/*
* Copyright 2003 Digi International (www.digi.com)
* Scott H Kilau <Scott_Kilau at digi dot com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
*/
/*
* In the original out of kernel Digi dgap driver, firmware
* loading was done via user land to driver handshaking.
*
* For cards that support a concentrator (port expander),
* I believe the concentrator its self told the card which
* concentrator is actually attached and then that info
* was used to tell user land which concentrator firmware
* image was to be downloaded. I think even the BIOS or
* FEP images required could change with the connection
* of a particular concentrator.
*
* Since I have no access to any of these cards or
* concentrators, I cannot put the correct concentrator
* firmware file names into the firmware_info structure
* as is now done for the BIOS and FEP images.
*
* I think, but am not certain, that the cards supporting
* concentrators will function without them. So support
* of these cards has been left in this driver.
*
* In order to fully support those cards, they would
* either have to be acquired for dissection or maybe
* Digi International could provide some assistance.
*/
#undef DIGI_CONCENTRATORS_SUPPORTED
#define pr_fmt(fmt) "dgap: " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/delay.h> /* For udelay */
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/sched.h>
#include <linux/interrupt.h> /* For tasklet and interrupt structs/defines */
#include <linux/ctype.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial_reg.h>
#include <linux/io.h> /* For read[bwl]/write[bwl] */
#include <linux/string.h>
#include <linux/device.h>
#include <linux/kdev_t.h>
#include <linux/firmware.h>
#include "dgap.h"
/*
* File operations permitted on Control/Management major.
*/
static const struct file_operations dgap_board_fops = {
.owner = THIS_MODULE,
};
static uint dgap_numboards;
static struct board_t *dgap_board[MAXBOARDS];
static ulong dgap_poll_counter;
static int dgap_driver_state = DRIVER_INITIALIZED;
static int dgap_poll_tick = 20; /* Poll interval - 20 ms */
static struct class *dgap_class;
static uint dgap_count = 500;
/*
* Poller stuff
*/
static DEFINE_SPINLOCK(dgap_poll_lock); /* Poll scheduling lock */
static ulong dgap_poll_time; /* Time of next poll */
static uint dgap_poll_stop; /* Used to tell poller to stop */
static struct timer_list dgap_poll_timer;
/*
SUPPORTED PRODUCTS
Card Model Number of Ports Interface
----------------------------------------------------------------
Acceleport Xem 4 - 64 (EIA232 & EIA422)
Acceleport Xr 4 & 8 (EIA232)
Acceleport Xr 920 4 & 8 (EIA232)
Acceleport C/X 8 - 128 (EIA232)
Acceleport EPC/X 8 - 224 (EIA232)
Acceleport Xr/422 4 & 8 (EIA422)
Acceleport 2r/920 2 (EIA232)
Acceleport 4r/920 4 (EIA232)
Acceleport 8r/920 8 (EIA232)
IBM 8-Port Asynchronous PCI Adapter (EIA232)
IBM 128-Port Asynchronous PCI Adapter (EIA232 & EIA422)
*/
static struct pci_device_id dgap_pci_tbl[] = {
{ DIGI_VID, PCI_DEV_XEM_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ DIGI_VID, PCI_DEV_CX_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 },
{ DIGI_VID, PCI_DEV_CX_IBM_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2 },
{ DIGI_VID, PCI_DEV_EPCJ_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3 },
{ DIGI_VID, PCI_DEV_920_2_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 },
{ DIGI_VID, PCI_DEV_920_4_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5 },
{ DIGI_VID, PCI_DEV_920_8_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 6 },
{ DIGI_VID, PCI_DEV_XR_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 7 },
{ DIGI_VID, PCI_DEV_XRJ_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 8 },
{ DIGI_VID, PCI_DEV_XR_422_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 9 },
{ DIGI_VID, PCI_DEV_XR_IBM_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 10 },
{ DIGI_VID, PCI_DEV_XR_SAIP_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 11 },
{ DIGI_VID, PCI_DEV_XR_BULL_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 12 },
{ DIGI_VID, PCI_DEV_920_8_HP_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 13 },
{ DIGI_VID, PCI_DEV_XEM_HP_DID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 14 },
{0,} /* 0 terminated list. */
};
MODULE_DEVICE_TABLE(pci, dgap_pci_tbl);
/*
* A generic list of Product names, PCI Vendor ID, and PCI Device ID.
*/
struct board_id {
uint config_type;
u8 *name;
uint maxports;
uint dpatype;
};
static struct board_id dgap_ids[] = {
{PPCM, PCI_DEV_XEM_NAME, 64, (T_PCXM | T_PCLITE | T_PCIBUS)},
{PCX, PCI_DEV_CX_NAME, 128, (T_CX | T_PCIBUS) },
{PCX, PCI_DEV_CX_IBM_NAME, 128, (T_CX | T_PCIBUS) },
{PEPC, PCI_DEV_EPCJ_NAME, 224, (T_EPC | T_PCIBUS) },
{APORT2_920P, PCI_DEV_920_2_NAME, 2, (T_PCXR | T_PCLITE | T_PCIBUS)},
{APORT4_920P, PCI_DEV_920_4_NAME, 4, (T_PCXR | T_PCLITE | T_PCIBUS)},
{APORT8_920P, PCI_DEV_920_8_NAME, 8, (T_PCXR | T_PCLITE | T_PCIBUS)},
{PAPORT8, PCI_DEV_XR_NAME, 8, (T_PCXR | T_PCLITE | T_PCIBUS)},
{PAPORT8, PCI_DEV_XRJ_NAME, 8, (T_PCXR | T_PCLITE | T_PCIBUS)},
{PAPORT8, PCI_DEV_XR_422_NAME, 8, (T_PCXR | T_PCLITE | T_PCIBUS)},
{PAPORT8, PCI_DEV_XR_IBM_NAME, 8, (T_PCXR | T_PCLITE | T_PCIBUS)},
{PAPORT8, PCI_DEV_XR_SAIP_NAME, 8, (T_PCXR | T_PCLITE | T_PCIBUS)},
{PAPORT8, PCI_DEV_XR_BULL_NAME, 8, (T_PCXR | T_PCLITE | T_PCIBUS)},
{APORT8_920P, PCI_DEV_920_8_HP_NAME, 8, (T_PCXR | T_PCLITE | T_PCIBUS)},
{PPCM, PCI_DEV_XEM_HP_NAME, 64, (T_PCXM | T_PCLITE | T_PCIBUS)},
{0,} /* 0 terminated list. */
};
struct firmware_info {
u8 *conf_name; /* dgap.conf */
u8 *bios_name; /* BIOS filename */
u8 *fep_name; /* FEP filename */
u8 *con_name; /* Concentrator filename FIXME*/
int num; /* sequence number */
};
/*
* Firmware - BIOS, FEP, and CONC filenames
*/
static struct firmware_info fw_info[] = {
{ "dgap/dgap.conf", "dgap/sxbios.bin", "dgap/sxfep.bin", NULL, 0 },
{ "dgap/dgap.conf", "dgap/cxpbios.bin", "dgap/cxpfep.bin", NULL, 1 },
{ "dgap/dgap.conf", "dgap/cxpbios.bin", "dgap/cxpfep.bin", NULL, 2 },
{ "dgap/dgap.conf", "dgap/pcibios.bin", "dgap/pcifep.bin", NULL, 3 },
{ "dgap/dgap.conf", "dgap/xrbios.bin", "dgap/xrfep.bin", NULL, 4 },
{ "dgap/dgap.conf", "dgap/xrbios.bin", "dgap/xrfep.bin", NULL, 5 },
{ "dgap/dgap.conf", "dgap/xrbios.bin", "dgap/xrfep.bin", NULL, 6 },
{ "dgap/dgap.conf", "dgap/xrbios.bin", "dgap/xrfep.bin", NULL, 7 },
{ "dgap/dgap.conf", "dgap/xrbios.bin", "dgap/xrfep.bin", NULL, 8 },
{ "dgap/dgap.conf", "dgap/xrbios.bin", "dgap/xrfep.bin", NULL, 9 },
{ "dgap/dgap.conf", "dgap/xrbios.bin", "dgap/xrfep.bin", NULL, 10 },
{ "dgap/dgap.conf", "dgap/xrbios.bin", "dgap/xrfep.bin", NULL, 11 },
{ "dgap/dgap.conf", "dgap/xrbios.bin", "dgap/xrfep.bin", NULL, 12 },
{ "dgap/dgap.conf", "dgap/xrbios.bin", "dgap/xrfep.bin", NULL, 13 },
{ "dgap/dgap.conf", "dgap/sxbios.bin", "dgap/sxfep.bin", NULL, 14 },
{NULL,}
};
/*
* Default transparent print information.
*/
static struct digi_t dgap_digi_init = {
.digi_flags = DIGI_COOK, /* Flags */
.digi_maxcps = 100, /* Max CPS */
.digi_maxchar = 50, /* Max chars in print queue */
.digi_bufsize = 100, /* Printer buffer size */
.digi_onlen = 4, /* size of printer on string */
.digi_offlen = 4, /* size of printer off string */
.digi_onstr = "\033[5i", /* ANSI printer on string ] */
.digi_offstr = "\033[4i", /* ANSI printer off string ] */
.digi_term = "ansi" /* default terminal type */
};
/*
* Define a local default termios struct. All ports will be created
* with this termios initially.
*
* This defines a raw port at 9600 baud, 8 data bits, no parity,
* 1 stop bit.
*/
static struct ktermios dgap_default_termios = {
.c_iflag = (DEFAULT_IFLAGS), /* iflags */
.c_oflag = (DEFAULT_OFLAGS), /* oflags */
.c_cflag = (DEFAULT_CFLAGS), /* cflags */
.c_lflag = (DEFAULT_LFLAGS), /* lflags */
.c_cc = INIT_C_CC,
.c_line = 0,
};
/*
* Our needed internal static variables from dgap_parse.c
*/
static struct cnode dgap_head;
#define MAXCWORD 200
static char dgap_cword[MAXCWORD];
struct toklist {
int token;
char *string;
};
static struct toklist dgap_brdtype[] = {
{ PCX, "Digi_AccelePort_C/X_PCI" },
{ PEPC, "Digi_AccelePort_EPC/X_PCI" },
{ PPCM, "Digi_AccelePort_Xem_PCI" },
{ APORT2_920P, "Digi_AccelePort_2r_920_PCI" },
{ APORT4_920P, "Digi_AccelePort_4r_920_PCI" },
{ APORT8_920P, "Digi_AccelePort_8r_920_PCI" },
{ PAPORT4, "Digi_AccelePort_4r_PCI(EIA-232/RS-422)" },
{ PAPORT8, "Digi_AccelePort_8r_PCI(EIA-232/RS-422)" },
{ 0, NULL }
};
static struct toklist dgap_tlist[] = {
{ BEGIN, "config_begin" },
{ END, "config_end" },
{ BOARD, "board" },
{ PCIINFO, "pciinfo" },
{ LINE, "line" },
{ CONC, "conc" },
{ CONC, "concentrator" },
{ CX, "cx" },
{ CX, "ccon" },
{ EPC, "epccon" },
{ EPC, "epc" },
{ MOD, "module" },
{ ID, "id" },
{ STARTO, "start" },
{ SPEED, "speed" },
{ CABLE, "cable" },
{ CONNECT, "connect" },
{ METHOD, "method" },
{ STATUS, "status" },
{ CUSTOM, "Custom" },
{ BASIC, "Basic" },
{ MEM, "mem" },
{ MEM, "memory" },
{ PORTS, "ports" },
{ MODEM, "modem" },
{ NPORTS, "nports" },
{ TTYN, "ttyname" },
{ CU, "cuname" },
{ PRINT, "prname" },
{ CMAJOR, "major" },
{ ALTPIN, "altpin" },
{ USEINTR, "useintr" },
{ TTSIZ, "ttysize" },
{ CHSIZ, "chsize" },
{ BSSIZ, "boardsize" },
{ UNTSIZ, "schedsize" },
{ F2SIZ, "f2200size" },
{ VPSIZ, "vpixsize" },
{ 0, NULL }
};
/*
* get a word from the input stream, also keep track of current line number.
* words are separated by whitespace.
*/
static char *dgap_getword(char **in)
{
char *ret_ptr = *in;
char *ptr = strpbrk(*in, " \t\n");
/* If no word found, return null */
if (!ptr)
return NULL;
/* Mark new location for our buffer */
*ptr = '\0';
*in = ptr + 1;
/* Eat any extra spaces/tabs/newlines that might be present */
while (*in && **in && ((**in == ' ') ||
(**in == '\t') ||
(**in == '\n'))) {
**in = '\0';
*in = *in + 1;
}
return ret_ptr;
}
/*
* Get a token from the input file; return 0 if end of file is reached
*/
static int dgap_gettok(char **in)
{
char *w;
struct toklist *t;
if (strstr(dgap_cword, "board")) {
w = dgap_getword(in);
if (!w)
return 0;
snprintf(dgap_cword, MAXCWORD, "%s", w);
for (t = dgap_brdtype; t->token != 0; t++) {
if (!strcmp(w, t->string))
return t->token;
}
} else {
while ((w = dgap_getword(in))) {
snprintf(dgap_cword, MAXCWORD, "%s", w);
for (t = dgap_tlist; t->token != 0; t++) {
if (!strcmp(w, t->string))
return t->token;
}
}
}
return 0;
}
/*
* dgap_checknode: see if all the necessary info has been supplied for a node
* before creating the next node.
*/
static int dgap_checknode(struct cnode *p)
{
switch (p->type) {
case LNODE:
if (p->u.line.v_speed == 0) {
pr_err("line speed not specified");
return 1;
}
return 0;
case CNODE:
if (p->u.conc.v_speed == 0) {
pr_err("concentrator line speed not specified");
return 1;
}
if (p->u.conc.v_nport == 0) {
pr_err("number of ports on concentrator not specified");
return 1;
}
if (p->u.conc.v_id == 0) {
pr_err("concentrator id letter not specified");
return 1;
}
return 0;
case MNODE:
if (p->u.module.v_nport == 0) {
pr_err("number of ports on EBI module not specified");
return 1;
}
if (p->u.module.v_id == 0) {
pr_err("EBI module id letter not specified");
return 1;
}
return 0;
}
return 0;
}
/*
* Given a board pointer, returns whether we should use interrupts or not.
*/
static uint dgap_config_get_useintr(struct board_t *bd)
{
struct cnode *p;
if (!bd)
return 0;
for (p = bd->bd_config; p; p = p->next) {
if (p->type == INTRNODE) {
/*
* check for pcxr types.
*/
return p->u.useintr;
}
}
/* If not found, then don't turn on interrupts. */
return 0;
}
/*
* Given a board pointer, returns whether we turn on altpin or not.
*/
static uint dgap_config_get_altpin(struct board_t *bd)
{
struct cnode *p;
if (!bd)
return 0;
for (p = bd->bd_config; p; p = p->next) {
if (p->type == ANODE) {
/*
* check for pcxr types.
*/
return p->u.altpin;
}
}
/* If not found, then don't turn on interrupts. */
return 0;
}
/*
* Given a specific type of board, if found, detached link and
* returns the first occurrence in the list.
*/
static struct cnode *dgap_find_config(int type, int bus, int slot)
{
struct cnode *p, *prev, *prev2, *found;
p = &dgap_head;
while (p->next) {
prev = p;
p = p->next;
if (p->type != BNODE)
continue;
if (p->u.board.type != type)
continue;
if (p->u.board.v_pcibus &&
p->u.board.pcibus != bus)
continue;
if (p->u.board.v_pcislot &&
p->u.board.pcislot != slot)
continue;
found = p;
/*
* Keep walking thru the list till we
* find the next board.
*/
while (p->next) {
prev2 = p;
p = p->next;
if (p->type != BNODE)
continue;
/*
* Mark the end of our 1 board
* chain of configs.
*/
prev2->next = NULL;
/*
* Link the "next" board to the
* previous board, effectively
* "unlinking" our board from
* the main config.
*/
prev->next = p;
return found;
}
/*
* It must be the last board in the list.
*/
prev->next = NULL;
return found;
}
return NULL;
}
/*
* Given a board pointer, walks the config link, counting up
* all ports user specified should be on the board.
* (This does NOT mean they are all actually present right now tho)
*/
static uint dgap_config_get_num_prts(struct board_t *bd)
{
int count = 0;
struct cnode *p;
if (!bd)
return 0;
for (p = bd->bd_config; p; p = p->next) {
switch (p->type) {
case BNODE:
/*
* check for pcxr types.
*/
if (p->u.board.type > EPCFE)
count += p->u.board.nport;
break;
case CNODE:
count += p->u.conc.nport;
break;
case MNODE:
count += p->u.module.nport;
break;
}
}
return count;
}
static char *dgap_create_config_string(struct board_t *bd, char *string)
{
char *ptr = string;
struct cnode *p;
struct cnode *q;
int speed;
if (!bd) {
*ptr = 0xff;
return string;
}
for (p = bd->bd_config; p; p = p->next) {
switch (p->type) {
case LNODE:
*ptr = '\0';
ptr++;
*ptr = p->u.line.speed;
ptr++;
break;
case CNODE:
/*
* Because the EPC/con concentrators can have EM modules
* hanging off of them, we have to walk ahead in the
* list and keep adding the number of ports on each EM
* to the config. UGH!
*/
speed = p->u.conc.speed;
q = p->next;
if (q && (q->type == MNODE)) {
*ptr = (p->u.conc.nport + 0x80);
ptr++;
p = q;
while (q->next && (q->next->type) == MNODE) {
*ptr = (q->u.module.nport + 0x80);
ptr++;
p = q;
q = q->next;
}
*ptr = q->u.module.nport;
ptr++;
} else {
*ptr = p->u.conc.nport;
ptr++;
}
*ptr = speed;
ptr++;
break;
}
}
*ptr = 0xff;
return string;
}
/*
* Parse a configuration file read into memory as a string.
*/
static int dgap_parsefile(char **in)
{
struct cnode *p, *brd, *line, *conc;
int rc;
char *s;
int linecnt = 0;
p = &dgap_head;
brd = line = conc = NULL;
/* perhaps we are adding to an existing list? */
while (p->next)
p = p->next;
/* file must start with a BEGIN */
while ((rc = dgap_gettok(in)) != BEGIN) {
if (rc == 0) {
pr_err("unexpected EOF");
return -1;
}
}
for (; ;) {
int board_type = 0;
int conc_type = 0;
int module_type = 0;
rc = dgap_gettok(in);
if (rc == 0) {
pr_err("unexpected EOF");
return -1;
}
switch (rc) {
case BEGIN: /* should only be 1 begin */
pr_err("unexpected config_begin\n");
return -1;
case END:
return 0;
case BOARD: /* board info */
if (dgap_checknode(p))
return -1;
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = BNODE;
p->u.board.status = kstrdup("No", GFP_KERNEL);
line = conc = NULL;
brd = p;
linecnt = -1;
board_type = dgap_gettok(in);
if (board_type == 0) {
pr_err("board !!type not specified");
return -1;
}
p->u.board.type = board_type;
break;
case MEM: /* memory address */
if (p->type != BNODE) {
pr_err("memory address only valid for boards");
return -1;
}
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
kfree(p->u.board.addrstr);
p->u.board.addrstr = kstrdup(s, GFP_KERNEL);
if (kstrtoul(s, 0, &p->u.board.addr)) {
pr_err("bad number for memory address");
return -1;
}
p->u.board.v_addr = 1;
break;
case PCIINFO: /* pci information */
if (p->type != BNODE) {
pr_err("memory address only valid for boards");
return -1;
}
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
kfree(p->u.board.pcibusstr);
p->u.board.pcibusstr = kstrdup(s, GFP_KERNEL);
if (kstrtoul(s, 0, &p->u.board.pcibus)) {
pr_err("bad number for pci bus");
return -1;
}
p->u.board.v_pcibus = 1;
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
kfree(p->u.board.pcislotstr);
p->u.board.pcislotstr = kstrdup(s, GFP_KERNEL);
if (kstrtoul(s, 0, &p->u.board.pcislot)) {
pr_err("bad number for pci slot");
return -1;
}
p->u.board.v_pcislot = 1;
break;
case METHOD:
if (p->type != BNODE) {
pr_err("install method only valid for boards");
return -1;
}
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
kfree(p->u.board.method);
p->u.board.method = kstrdup(s, GFP_KERNEL);
p->u.board.v_method = 1;
break;
case STATUS:
if (p->type != BNODE) {
pr_err("config status only valid for boards");
return -1;
}
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
kfree(p->u.board.status);
p->u.board.status = kstrdup(s, GFP_KERNEL);
break;
case NPORTS: /* number of ports */
if (p->type == BNODE) {
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.board.nport)) {
pr_err("bad number for number of ports");
return -1;
}
p->u.board.v_nport = 1;
} else if (p->type == CNODE) {
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.conc.nport)) {
pr_err("bad number for number of ports");
return -1;
}
p->u.conc.v_nport = 1;
} else if (p->type == MNODE) {
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.module.nport)) {
pr_err("bad number for number of ports");
return -1;
}
p->u.module.v_nport = 1;
} else {
pr_err("nports only valid for concentrators or modules");
return -1;
}
break;
case ID: /* letter ID used in tty name */
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
kfree(p->u.board.status);
p->u.board.status = kstrdup(s, GFP_KERNEL);
if (p->type == CNODE) {
kfree(p->u.conc.id);
p->u.conc.id = kstrdup(s, GFP_KERNEL);
p->u.conc.v_id = 1;
} else if (p->type == MNODE) {
kfree(p->u.module.id);
p->u.module.id = kstrdup(s, GFP_KERNEL);
p->u.module.v_id = 1;
} else {
pr_err("id only valid for concentrators or modules");
return -1;
}
break;
case STARTO: /* start offset of ID */
if (p->type == BNODE) {
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.board.start)) {
pr_err("bad number for start of tty count");
return -1;
}
p->u.board.v_start = 1;
} else if (p->type == CNODE) {
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.conc.start)) {
pr_err("bad number for start of tty count");
return -1;
}
p->u.conc.v_start = 1;
} else if (p->type == MNODE) {
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.module.start)) {
pr_err("bad number for start of tty count");
return -1;
}
p->u.module.v_start = 1;
} else {
pr_err("start only valid for concentrators or modules");
return -1;
}
break;
case TTYN: /* tty name prefix */
if (dgap_checknode(p))
return -1;
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = TNODE;
s = dgap_getword(in);
if (!s) {
pr_err("unexpeced end of file");
return -1;
}
p->u.ttyname = kstrdup(s, GFP_KERNEL);
if (!p->u.ttyname)
return -1;
break;
case CU: /* cu name prefix */
if (dgap_checknode(p))
return -1;
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = CUNODE;
s = dgap_getword(in);
if (!s) {
pr_err("unexpeced end of file");
return -1;
}
p->u.cuname = kstrdup(s, GFP_KERNEL);
if (!p->u.cuname)
return -1;
break;
case LINE: /* line information */
if (dgap_checknode(p))
return -1;
if (!brd) {
pr_err("must specify board before line info");
return -1;
}
switch (brd->u.board.type) {
case PPCM:
pr_err("line not valid for PC/em");
return -1;
}
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = LNODE;
conc = NULL;
line = p;
linecnt++;
break;
case CONC: /* concentrator information */
if (dgap_checknode(p))
return -1;
if (!line) {
pr_err("must specify line info before concentrator");
return -1;
}
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = CNODE;
conc = p;
if (linecnt)
brd->u.board.conc2++;
else
brd->u.board.conc1++;
conc_type = dgap_gettok(in);
if (conc_type == 0 ||
(conc_type != CX && conc_type != EPC)) {
pr_err("failed to set a type of concentratros");
return -1;
}
p->u.conc.type = conc_type;
break;
case MOD: /* EBI module */
if (dgap_checknode(p))
return -1;
if (!brd) {
pr_err("must specify board info before EBI modules");
return -1;
}
switch (brd->u.board.type) {
case PPCM:
linecnt = 0;
break;
default:
if (!conc) {
pr_err("must specify concentrator info before EBI module");
return -1;
}
}
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = MNODE;
if (linecnt)
brd->u.board.module2++;
else
brd->u.board.module1++;
module_type = dgap_gettok(in);
if (module_type == 0 ||
(module_type != PORTS && module_type != MODEM)) {
pr_err("failed to set a type of module");
return -1;
}
p->u.module.type = module_type;
break;
case CABLE:
if (p->type == LNODE) {
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
kfree(p->u.line.cable);
p->u.line.cable = kstrdup(s, GFP_KERNEL);
p->u.line.v_cable = 1;
}
break;
case SPEED: /* sync line speed indication */
if (p->type == LNODE) {
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.line.speed)) {
pr_err("bad number for line speed");
return -1;
}
p->u.line.v_speed = 1;
} else if (p->type == CNODE) {
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.conc.speed)) {
pr_err("bad number for line speed");
return -1;
}
p->u.conc.v_speed = 1;
} else {
pr_err("speed valid only for lines or concentrators.");
return -1;
}
break;
case CONNECT:
if (p->type == CNODE) {
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
kfree(p->u.conc.connect);
p->u.conc.connect = kstrdup(s, GFP_KERNEL);
p->u.conc.v_connect = 1;
}
break;
case PRINT: /* transparent print name prefix */
if (dgap_checknode(p))
return -1;
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = PNODE;
s = dgap_getword(in);
if (!s) {
pr_err("unexpeced end of file");
return -1;
}
p->u.printname = kstrdup(s, GFP_KERNEL);
if (!p->u.printname)
return -1;
break;
case CMAJOR: /* major number */
if (dgap_checknode(p))
return -1;
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = JNODE;
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.majornumber)) {
pr_err("bad number for major number");
return -1;
}
break;
case ALTPIN: /* altpin setting */
if (dgap_checknode(p))
return -1;
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = ANODE;
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.altpin)) {
pr_err("bad number for altpin");
return -1;
}
break;
case USEINTR: /* enable interrupt setting */
if (dgap_checknode(p))
return -1;
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = INTRNODE;
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.useintr)) {
pr_err("bad number for useintr");
return -1;
}
break;
case TTSIZ: /* size of tty structure */
if (dgap_checknode(p))
return -1;
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = TSNODE;
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.ttysize)) {
pr_err("bad number for ttysize");
return -1;
}
break;
case CHSIZ: /* channel structure size */
if (dgap_checknode(p))
return -1;
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = CSNODE;
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.chsize)) {
pr_err("bad number for chsize");
return -1;
}
break;
case BSSIZ: /* board structure size */
if (dgap_checknode(p))
return -1;
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = BSNODE;
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.bssize)) {
pr_err("bad number for bssize");
return -1;
}
break;
case UNTSIZ: /* sched structure size */
if (dgap_checknode(p))
return -1;
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = USNODE;
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.unsize)) {
pr_err("bad number for schedsize");
return -1;
}
break;
case F2SIZ: /* f2200 structure size */
if (dgap_checknode(p))
return -1;
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = FSNODE;
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.f2size)) {
pr_err("bad number for f2200size");
return -1;
}
break;
case VPSIZ: /* vpix structure size */
if (dgap_checknode(p))
return -1;
p->next = kzalloc(sizeof(struct cnode), GFP_KERNEL);
if (!p->next)
return -ENOMEM;
p = p->next;
p->type = VSNODE;
s = dgap_getword(in);
if (!s) {
pr_err("unexpected end of file");
return -1;
}
if (kstrtol(s, 0, &p->u.vpixsize)) {
pr_err("bad number for vpixsize");
return -1;
}
break;
}
}
}
static void dgap_cleanup_nodes(void)
{
struct cnode *p;
p = &dgap_head;
while (p) {
struct cnode *tmp = p->next;
if (p->type == NULLNODE) {
p = tmp;
continue;
}
switch (p->type) {
case BNODE:
kfree(p->u.board.addrstr);
kfree(p->u.board.pcibusstr);
kfree(p->u.board.pcislotstr);
kfree(p->u.board.method);
break;
case CNODE:
kfree(p->u.conc.id);
kfree(p->u.conc.connect);
break;
case MNODE:
kfree(p->u.module.id);
break;
case TNODE:
kfree(p->u.ttyname);
break;
case CUNODE:
kfree(p->u.cuname);
break;
case LNODE:
kfree(p->u.line.cable);
break;
case PNODE:
kfree(p->u.printname);
break;
}
kfree(p->u.board.status);
kfree(p);
p = tmp;
}
}
/*
* Retrives the current custom baud rate from FEP memory,
* and returns it back to the user.
* Returns 0 on error.
*/
static uint dgap_get_custom_baud(struct channel_t *ch)
{
u8 __iomem *vaddr;
ulong offset;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return 0;
if (!ch->ch_bd || ch->ch_bd->magic != DGAP_BOARD_MAGIC)
return 0;
if (!(ch->ch_bd->bd_flags & BD_FEP5PLUS))
return 0;
vaddr = ch->ch_bd->re_map_membase;
if (!vaddr)
return 0;
/*
* Go get from fep mem, what the fep
* believes the custom baud rate is.
*/
offset = (ioread16(vaddr + ECS_SEG) << 4) + (ch->ch_portnum * 0x28)
+ LINE_SPEED;
return readw(vaddr + offset);
}
/*
* Remap PCI memory.
*/
static int dgap_remap(struct board_t *brd)
{
if (!brd || brd->magic != DGAP_BOARD_MAGIC)
return -EIO;
if (!request_mem_region(brd->membase, 0x200000, "dgap"))
return -ENOMEM;
if (!request_mem_region(brd->membase + PCI_IO_OFFSET, 0x200000, "dgap"))
goto err_req_mem;
brd->re_map_membase = ioremap(brd->membase, 0x200000);
if (!brd->re_map_membase)
goto err_remap_mem;
brd->re_map_port = ioremap((brd->membase + PCI_IO_OFFSET), 0x200000);
if (!brd->re_map_port)
goto err_remap_port;
return 0;
err_remap_port:
iounmap(brd->re_map_membase);
err_remap_mem:
release_mem_region(brd->membase + PCI_IO_OFFSET, 0x200000);
err_req_mem:
release_mem_region(brd->membase, 0x200000);
return -ENOMEM;
}
static void dgap_unmap(struct board_t *brd)
{
iounmap(brd->re_map_port);
iounmap(brd->re_map_membase);
release_mem_region(brd->membase + PCI_IO_OFFSET, 0x200000);
release_mem_region(brd->membase, 0x200000);
}
/*
* dgap_parity_scan()
*
* Convert the FEP5 way of reporting parity errors and breaks into
* the Linux line discipline way.
*/
static void dgap_parity_scan(struct channel_t *ch, unsigned char *cbuf,
unsigned char *fbuf, int *len)
{
int l = *len;
int count = 0;
unsigned char *in, *cout, *fout;
unsigned char c;
in = cbuf;
cout = cbuf;
fout = fbuf;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
while (l--) {
c = *in++;
switch (ch->pscan_state) {
default:
/* reset to sanity and fall through */
ch->pscan_state = 0;
case 0:
/* No FF seen yet */
if (c == (unsigned char)'\377')
/* delete this character from stream */
ch->pscan_state = 1;
else {
*cout++ = c;
*fout++ = TTY_NORMAL;
count += 1;
}
break;
case 1:
/* first FF seen */
if (c == (unsigned char)'\377') {
/* doubled ff, transform to single ff */
*cout++ = c;
*fout++ = TTY_NORMAL;
count += 1;
ch->pscan_state = 0;
} else {
/* save value examination in next state */
ch->pscan_savechar = c;
ch->pscan_state = 2;
}
break;
case 2:
/* third character of ff sequence */
*cout++ = c;
if (ch->pscan_savechar == 0x0) {
if (c == 0x0) {
ch->ch_err_break++;
*fout++ = TTY_BREAK;
} else {
ch->ch_err_parity++;
*fout++ = TTY_PARITY;
}
}
count += 1;
ch->pscan_state = 0;
}
}
*len = count;
}
/*=======================================================================
*
* dgap_input - Process received data.
*
* ch - Pointer to channel structure.
*
*=======================================================================*/
static void dgap_input(struct channel_t *ch)
{
struct board_t *bd;
struct bs_t __iomem *bs;
struct tty_struct *tp;
struct tty_ldisc *ld;
uint rmask;
uint head;
uint tail;
int data_len;
ulong lock_flags;
ulong lock_flags2;
int flip_len;
int len;
int n;
u8 *buf;
u8 tmpchar;
int s;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
tp = ch->ch_tun.un_tty;
bs = ch->ch_bs;
if (!bs)
return;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
/*
* Figure the number of characters in the buffer.
* Exit immediately if none.
*/
rmask = ch->ch_rsize - 1;
head = readw(&bs->rx_head);
head &= rmask;
tail = readw(&bs->rx_tail);
tail &= rmask;
data_len = (head - tail) & rmask;
if (data_len == 0) {
writeb(1, &bs->idata);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return;
}
/*
* If the device is not open, or CREAD is off, flush
* input data and return immediately.
*/
if ((bd->state != BOARD_READY) || !tp ||
(tp->magic != TTY_MAGIC) ||
!(ch->ch_tun.un_flags & UN_ISOPEN) ||
!(tp->termios.c_cflag & CREAD) ||
(ch->ch_tun.un_flags & UN_CLOSING)) {
writew(head, &bs->rx_tail);
writeb(1, &bs->idata);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return;
}
/*
* If we are throttled, simply don't read any data.
*/
if (ch->ch_flags & CH_RXBLOCK) {
writeb(1, &bs->idata);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return;
}
/*
* Ignore oruns.
*/
tmpchar = readb(&bs->orun);
if (tmpchar) {
ch->ch_err_overrun++;
writeb(0, &bs->orun);
}
/* Decide how much data we can send into the tty layer */
flip_len = TTY_FLIPBUF_SIZE;
/* Chop down the length, if needed */
len = min(data_len, flip_len);
len = min(len, (N_TTY_BUF_SIZE - 1));
ld = tty_ldisc_ref(tp);
#ifdef TTY_DONT_FLIP
/*
* If the DONT_FLIP flag is on, don't flush our buffer, and act
* like the ld doesn't have any space to put the data right now.
*/
if (test_bit(TTY_DONT_FLIP, &tp->flags))
len = 0;
#endif
/*
* If we were unable to get a reference to the ld,
* don't flush our buffer, and act like the ld doesn't
* have any space to put the data right now.
*/
if (!ld) {
len = 0;
} else {
/*
* If ld doesn't have a pointer to a receive_buf function,
* flush the data, then act like the ld doesn't have any
* space to put the data right now.
*/
if (!ld->ops->receive_buf) {
writew(head, &bs->rx_tail);
len = 0;
}
}
if (len <= 0) {
writeb(1, &bs->idata);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
if (ld)
tty_ldisc_deref(ld);
return;
}
buf = ch->ch_bd->flipbuf;
n = len;
/*
* n now contains the most amount of data we can copy,
* bounded either by our buffer size or the amount
* of data the card actually has pending...
*/
while (n) {
s = ((head >= tail) ? head : ch->ch_rsize) - tail;
s = min(s, n);
if (s <= 0)
break;
memcpy_fromio(buf, ch->ch_raddr + tail, s);
tail += s;
buf += s;
n -= s;
/* Flip queue if needed */
tail &= rmask;
}
writew(tail, &bs->rx_tail);
writeb(1, &bs->idata);
ch->ch_rxcount += len;
/*
* If we are completely raw, we don't need to go through a lot
* of the tty layers that exist.
* In this case, we take the shortest and fastest route we
* can to relay the data to the user.
*
* On the other hand, if we are not raw, we need to go through
* the tty layer, which has its API more well defined.
*/
if (I_PARMRK(tp) || I_BRKINT(tp) || I_INPCK(tp)) {
dgap_parity_scan(ch, ch->ch_bd->flipbuf,
ch->ch_bd->flipflagbuf, &len);
len = tty_buffer_request_room(tp->port, len);
tty_insert_flip_string_flags(tp->port, ch->ch_bd->flipbuf,
ch->ch_bd->flipflagbuf, len);
} else {
len = tty_buffer_request_room(tp->port, len);
tty_insert_flip_string(tp->port, ch->ch_bd->flipbuf, len);
}
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
/* Tell the tty layer its okay to "eat" the data now */
tty_flip_buffer_push(tp->port);
if (ld)
tty_ldisc_deref(ld);
}
static void dgap_write_wakeup(struct board_t *bd, struct channel_t *ch,
struct un_t *un, u32 mask,
unsigned long *irq_flags1,
unsigned long *irq_flags2)
{
if (!(un->un_flags & mask))
return;
un->un_flags &= ~mask;
if (!(un->un_flags & UN_ISOPEN))
return;
if ((un->un_tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
un->un_tty->ldisc->ops->write_wakeup) {
spin_unlock_irqrestore(&ch->ch_lock, *irq_flags2);
spin_unlock_irqrestore(&bd->bd_lock, *irq_flags1);
(un->un_tty->ldisc->ops->write_wakeup)(un->un_tty);
spin_lock_irqsave(&bd->bd_lock, *irq_flags1);
spin_lock_irqsave(&ch->ch_lock, *irq_flags2);
}
wake_up_interruptible(&un->un_tty->write_wait);
wake_up_interruptible(&un->un_flags_wait);
}
/************************************************************************
* Determines when CARRIER changes state and takes appropriate
* action.
************************************************************************/
static void dgap_carrier(struct channel_t *ch)
{
struct board_t *bd;
int virt_carrier = 0;
int phys_carrier = 0;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return;
/* Make sure altpin is always set correctly */
if (ch->ch_digi.digi_flags & DIGI_ALTPIN) {
ch->ch_dsr = DM_CD;
ch->ch_cd = DM_DSR;
} else {
ch->ch_dsr = DM_DSR;
ch->ch_cd = DM_CD;
}
if (ch->ch_mistat & D_CD(ch))
phys_carrier = 1;
if (ch->ch_digi.digi_flags & DIGI_FORCEDCD)
virt_carrier = 1;
if (ch->ch_c_cflag & CLOCAL)
virt_carrier = 1;
/*
* Test for a VIRTUAL carrier transition to HIGH.
*/
if (((ch->ch_flags & CH_FCAR) == 0) && (virt_carrier == 1)) {
/*
* When carrier rises, wake any threads waiting
* for carrier in the open routine.
*/
if (waitqueue_active(&(ch->ch_flags_wait)))
wake_up_interruptible(&ch->ch_flags_wait);
}
/*
* Test for a PHYSICAL carrier transition to HIGH.
*/
if (((ch->ch_flags & CH_CD) == 0) && (phys_carrier == 1)) {
/*
* When carrier rises, wake any threads waiting
* for carrier in the open routine.
*/
if (waitqueue_active(&(ch->ch_flags_wait)))
wake_up_interruptible(&ch->ch_flags_wait);
}
/*
* Test for a PHYSICAL transition to low, so long as we aren't
* currently ignoring physical transitions (which is what "virtual
* carrier" indicates).
*
* The transition of the virtual carrier to low really doesn't
* matter... it really only means "ignore carrier state", not
* "make pretend that carrier is there".
*/
if ((virt_carrier == 0) &&
((ch->ch_flags & CH_CD) != 0) &&
(phys_carrier == 0)) {
/*
* When carrier drops:
*
* Drop carrier on all open units.
*
* Flush queues, waking up any task waiting in the
* line discipline.
*
* Send a hangup to the control terminal.
*
* Enable all select calls.
*/
if (waitqueue_active(&(ch->ch_flags_wait)))
wake_up_interruptible(&ch->ch_flags_wait);
if (ch->ch_tun.un_open_count > 0)
tty_hangup(ch->ch_tun.un_tty);
if (ch->ch_pun.un_open_count > 0)
tty_hangup(ch->ch_pun.un_tty);
}
/*
* Make sure that our cached values reflect the current reality.
*/
if (virt_carrier == 1)
ch->ch_flags |= CH_FCAR;
else
ch->ch_flags &= ~CH_FCAR;
if (phys_carrier == 1)
ch->ch_flags |= CH_CD;
else
ch->ch_flags &= ~CH_CD;
}
/*=======================================================================
*
* dgap_event - FEP to host event processing routine.
*
* bd - Board of current event.
*
*=======================================================================*/
static int dgap_event(struct board_t *bd)
{
struct channel_t *ch;
ulong lock_flags;
ulong lock_flags2;
struct bs_t __iomem *bs;
u8 __iomem *event;
u8 __iomem *vaddr;
struct ev_t __iomem *eaddr;
uint head;
uint tail;
int port;
int reason;
int modem;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return -EIO;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
vaddr = bd->re_map_membase;
if (!vaddr) {
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return -EIO;
}
eaddr = (struct ev_t __iomem *)(vaddr + EVBUF);
/* Get our head and tail */
head = readw(&eaddr->ev_head);
tail = readw(&eaddr->ev_tail);
/*
* Forget it if pointers out of range.
*/
if (head >= EVMAX - EVSTART || tail >= EVMAX - EVSTART ||
(head | tail) & 03) {
/* Let go of board lock */
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return -EIO;
}
/*
* Loop to process all the events in the buffer.
*/
while (tail != head) {
/*
* Get interrupt information.
*/
event = bd->re_map_membase + tail + EVSTART;
port = ioread8(event);
reason = ioread8(event + 1);
modem = ioread8(event + 2);
ioread8(event + 3);
/*
* Make sure the interrupt is valid.
*/
if (port >= bd->nasync)
goto next;
if (!(reason & (IFMODEM | IFBREAK | IFTLW | IFTEM | IFDATA)))
goto next;
ch = bd->channels[port];
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
goto next;
/*
* If we have made it here, the event was valid.
* Lock down the channel.
*/
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
bs = ch->ch_bs;
if (!bs) {
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
goto next;
}
/*
* Process received data.
*/
if (reason & IFDATA) {
/*
* ALL LOCKS *MUST* BE DROPPED BEFORE CALLING INPUT!
* input could send some data to ld, which in turn
* could do a callback to one of our other functions.
*/
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
dgap_input(ch);
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
if (ch->ch_flags & CH_RACTIVE)
ch->ch_flags |= CH_RENABLE;
else
writeb(1, &bs->idata);
if (ch->ch_flags & CH_RWAIT) {
ch->ch_flags &= ~CH_RWAIT;
wake_up_interruptible
(&ch->ch_tun.un_flags_wait);
}
}
/*
* Process Modem change signals.
*/
if (reason & IFMODEM) {
ch->ch_mistat = modem;
dgap_carrier(ch);
}
/*
* Process break.
*/
if (reason & IFBREAK) {
if (ch->ch_tun.un_tty) {
/* A break has been indicated */
ch->ch_err_break++;
tty_buffer_request_room
(ch->ch_tun.un_tty->port, 1);
tty_insert_flip_char(ch->ch_tun.un_tty->port,
0, TTY_BREAK);
tty_flip_buffer_push(ch->ch_tun.un_tty->port);
}
}
/*
* Process Transmit low.
*/
if (reason & IFTLW) {
dgap_write_wakeup(bd, ch, &ch->ch_tun, UN_LOW,
&lock_flags, &lock_flags2);
dgap_write_wakeup(bd, ch, &ch->ch_pun, UN_LOW,
&lock_flags, &lock_flags2);
if (ch->ch_flags & CH_WLOW) {
ch->ch_flags &= ~CH_WLOW;
wake_up_interruptible(&ch->ch_flags_wait);
}
}
/*
* Process Transmit empty.
*/
if (reason & IFTEM) {
dgap_write_wakeup(bd, ch, &ch->ch_tun, UN_EMPTY,
&lock_flags, &lock_flags2);
dgap_write_wakeup(bd, ch, &ch->ch_pun, UN_EMPTY,
&lock_flags, &lock_flags2);
if (ch->ch_flags & CH_WEMPTY) {
ch->ch_flags &= ~CH_WEMPTY;
wake_up_interruptible(&ch->ch_flags_wait);
}
}
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
next:
tail = (tail + 4) & (EVMAX - EVSTART - 4);
}
writew(tail, &eaddr->ev_tail);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return 0;
}
/*
* Our board poller function.
*/
static void dgap_poll_tasklet(unsigned long data)
{
struct board_t *bd = (struct board_t *)data;
ulong lock_flags;
char __iomem *vaddr;
u16 head, tail;
if (!bd || (bd->magic != DGAP_BOARD_MAGIC))
return;
if (bd->inhibit_poller)
return;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
vaddr = bd->re_map_membase;
/*
* If board is ready, parse deeper to see if there is anything to do.
*/
if (bd->state == BOARD_READY) {
struct ev_t __iomem *eaddr;
if (!bd->re_map_membase) {
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return;
}
if (!bd->re_map_port) {
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return;
}
if (!bd->nasync)
goto out;
eaddr = (struct ev_t __iomem *)(vaddr + EVBUF);
/* Get our head and tail */
head = readw(&eaddr->ev_head);
tail = readw(&eaddr->ev_tail);
/*
* If there is an event pending. Go service it.
*/
if (head != tail) {
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
dgap_event(bd);
spin_lock_irqsave(&bd->bd_lock, lock_flags);
}
out:
/*
* If board is doing interrupts, ACK the interrupt.
*/
if (bd->intr_running)
readb(bd->re_map_port + 2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return;
}
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
}
/*
* dgap_found_board()
*
* A board has been found, init it.
*/
static struct board_t *dgap_found_board(struct pci_dev *pdev, int id,
int boardnum)
{
struct board_t *brd;
unsigned int pci_irq;
int i;
int ret;
/* get the board structure and prep it */
brd = kzalloc(sizeof(struct board_t), GFP_KERNEL);
if (!brd)
return ERR_PTR(-ENOMEM);
/* store the info for the board we've found */
brd->magic = DGAP_BOARD_MAGIC;
brd->boardnum = boardnum;
brd->vendor = dgap_pci_tbl[id].vendor;
brd->device = dgap_pci_tbl[id].device;
brd->pdev = pdev;
brd->pci_bus = pdev->bus->number;
brd->pci_slot = PCI_SLOT(pdev->devfn);
brd->name = dgap_ids[id].name;
brd->maxports = dgap_ids[id].maxports;
brd->type = dgap_ids[id].config_type;
brd->dpatype = dgap_ids[id].dpatype;
brd->dpastatus = BD_NOFEP;
init_waitqueue_head(&brd->state_wait);
spin_lock_init(&brd->bd_lock);
brd->inhibit_poller = FALSE;
brd->wait_for_bios = 0;
brd->wait_for_fep = 0;
for (i = 0; i < MAXPORTS; i++)
brd->channels[i] = NULL;
/* store which card & revision we have */
pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &brd->subvendor);
pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &brd->subdevice);
pci_read_config_byte(pdev, PCI_REVISION_ID, &brd->rev);
pci_irq = pdev->irq;
brd->irq = pci_irq;
/* get the PCI Base Address Registers */
/* Xr Jupiter and EPC use BAR 2 */
if (brd->device == PCI_DEV_XRJ_DID || brd->device == PCI_DEV_EPCJ_DID) {
brd->membase = pci_resource_start(pdev, 2);
brd->membase_end = pci_resource_end(pdev, 2);
}
/* Everyone else uses BAR 0 */
else {
brd->membase = pci_resource_start(pdev, 0);
brd->membase_end = pci_resource_end(pdev, 0);
}
if (!brd->membase) {
ret = -ENODEV;
goto free_brd;
}
if (brd->membase & 1)
brd->membase &= ~3;
else
brd->membase &= ~15;
/*
* On the PCI boards, there is no IO space allocated
* The I/O registers will be in the first 3 bytes of the
* upper 2MB of the 4MB memory space. The board memory
* will be mapped into the low 2MB of the 4MB memory space
*/
brd->port = brd->membase + PCI_IO_OFFSET;
brd->port_end = brd->port + PCI_IO_SIZE_DGAP;
/*
* Special initialization for non-PLX boards
*/
if (brd->device != PCI_DEV_XRJ_DID && brd->device != PCI_DEV_EPCJ_DID) {
unsigned short cmd;
pci_write_config_byte(pdev, 0x40, 0);
pci_write_config_byte(pdev, 0x46, 0);
/* Limit burst length to 2 doubleword transactions */
pci_write_config_byte(pdev, 0x42, 1);
/*
* Enable IO and mem if not already done.
* This was needed for support on Itanium.
*/
pci_read_config_word(pdev, PCI_COMMAND, &cmd);
cmd |= (PCI_COMMAND_IO | PCI_COMMAND_MEMORY);
pci_write_config_word(pdev, PCI_COMMAND, cmd);
}
/* init our poll helper tasklet */
tasklet_init(&brd->helper_tasklet, dgap_poll_tasklet,
(unsigned long)brd);
ret = dgap_remap(brd);
if (ret)
goto free_brd;
pr_info("dgap: board %d: %s (rev %d), irq %ld\n",
boardnum, brd->name, brd->rev, brd->irq);
return brd;
free_brd:
kfree(brd);
return ERR_PTR(ret);
}
/*
* dgap_intr()
*
* Driver interrupt handler.
*/
static irqreturn_t dgap_intr(int irq, void *voidbrd)
{
struct board_t *brd = voidbrd;
if (!brd)
return IRQ_NONE;
/*
* Check to make sure its for us.
*/
if (brd->magic != DGAP_BOARD_MAGIC)
return IRQ_NONE;
brd->intr_count++;
/*
* Schedule tasklet to run at a better time.
*/
tasklet_schedule(&brd->helper_tasklet);
return IRQ_HANDLED;
}
/*****************************************************************************
*
* Function:
*
* dgap_poll_handler
*
* Author:
*
* Scott H Kilau
*
* Parameters:
*
* dummy -- ignored
*
* Return Values:
*
* none
*
* Description:
*
* As each timer expires, it determines (a) whether the "transmit"
* waiter needs to be woken up, and (b) whether the poller needs to
* be rescheduled.
*
******************************************************************************/
static void dgap_poll_handler(ulong dummy)
{
unsigned int i;
struct board_t *brd;
unsigned long lock_flags;
ulong new_time;
dgap_poll_counter++;
/*
* Do not start the board state machine until
* driver tells us its up and running, and has
* everything it needs.
*/
if (dgap_driver_state != DRIVER_READY)
goto schedule_poller;
/*
* If we have just 1 board, or the system is not SMP,
* then use the typical old style poller.
* Otherwise, use our new tasklet based poller, which should
* speed things up for multiple boards.
*/
if ((dgap_numboards == 1) || (num_online_cpus() <= 1)) {
for (i = 0; i < dgap_numboards; i++) {
brd = dgap_board[i];
if (brd->state == BOARD_FAILED)
continue;
if (!brd->intr_running)
/* Call the real board poller directly */
dgap_poll_tasklet((unsigned long)brd);
}
} else {
/*
* Go thru each board, kicking off a
* tasklet for each if needed
*/
for (i = 0; i < dgap_numboards; i++) {
brd = dgap_board[i];
/*
* Attempt to grab the board lock.
*
* If we can't get it, no big deal, the next poll
* will get it. Basically, I just really don't want
* to spin in here, because I want to kick off my
* tasklets as fast as I can, and then get out the
* poller.
*/
if (!spin_trylock(&brd->bd_lock))
continue;
/*
* If board is in a failed state, don't bother
* scheduling a tasklet
*/
if (brd->state == BOARD_FAILED) {
spin_unlock(&brd->bd_lock);
continue;
}
/* Schedule a poll helper task */
if (!brd->intr_running)
tasklet_schedule(&brd->helper_tasklet);
/*
* Can't do DGAP_UNLOCK here, as we don't have
* lock_flags because we did a trylock above.
*/
spin_unlock(&brd->bd_lock);
}
}
schedule_poller:
/*
* Schedule ourself back at the nominal wakeup interval.
*/
spin_lock_irqsave(&dgap_poll_lock, lock_flags);
dgap_poll_time += dgap_jiffies_from_ms(dgap_poll_tick);
new_time = dgap_poll_time - jiffies;
if ((ulong)new_time >= 2 * dgap_poll_tick) {
dgap_poll_time =
jiffies + dgap_jiffies_from_ms(dgap_poll_tick);
}
dgap_poll_timer.function = dgap_poll_handler;
dgap_poll_timer.data = 0;
dgap_poll_timer.expires = dgap_poll_time;
spin_unlock_irqrestore(&dgap_poll_lock, lock_flags);
if (!dgap_poll_stop)
add_timer(&dgap_poll_timer);
}
/*=======================================================================
*
* dgap_cmdb - Sends a 2 byte command to the FEP.
*
* ch - Pointer to channel structure.
* cmd - Command to be sent.
* byte1 - Integer containing first byte to be sent.
* byte2 - Integer containing second byte to be sent.
* ncmds - Wait until ncmds or fewer cmds are left
* in the cmd buffer before returning.
*
*=======================================================================*/
static void dgap_cmdb(struct channel_t *ch, u8 cmd, u8 byte1,
u8 byte2, uint ncmds)
{
char __iomem *vaddr;
struct __iomem cm_t *cm_addr;
uint count;
uint n;
u16 head;
u16 tail;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
/*
* Check if board is still alive.
*/
if (ch->ch_bd->state == BOARD_FAILED)
return;
/*
* Make sure the pointers are in range before
* writing to the FEP memory.
*/
vaddr = ch->ch_bd->re_map_membase;
if (!vaddr)
return;
cm_addr = (struct cm_t __iomem *)(vaddr + CMDBUF);
head = readw(&cm_addr->cm_head);
/*
* Forget it if pointers out of range.
*/
if (head >= (CMDMAX - CMDSTART) || (head & 03)) {
ch->ch_bd->state = BOARD_FAILED;
return;
}
/*
* Put the data in the circular command buffer.
*/
writeb(cmd, (vaddr + head + CMDSTART + 0));
writeb((u8)ch->ch_portnum, (vaddr + head + CMDSTART + 1));
writeb(byte1, (vaddr + head + CMDSTART + 2));
writeb(byte2, (vaddr + head + CMDSTART + 3));
head = (head + 4) & (CMDMAX - CMDSTART - 4);
writew(head, &cm_addr->cm_head);
/*
* Wait if necessary before updating the head
* pointer to limit the number of outstanding
* commands to the FEP. If the time spent waiting
* is outlandish, declare the FEP dead.
*/
for (count = dgap_count ;;) {
head = readw(&cm_addr->cm_head);
tail = readw(&cm_addr->cm_tail);
n = (head - tail) & (CMDMAX - CMDSTART - 4);
if (n <= ncmds * sizeof(struct cm_t))
break;
if (--count == 0) {
ch->ch_bd->state = BOARD_FAILED;
return;
}
udelay(10);
}
}
/*=======================================================================
*
* dgap_cmdw - Sends a 1 word command to the FEP.
*
* ch - Pointer to channel structure.
* cmd - Command to be sent.
* word - Integer containing word to be sent.
* ncmds - Wait until ncmds or fewer cmds are left
* in the cmd buffer before returning.
*
*=======================================================================*/
static void dgap_cmdw(struct channel_t *ch, u8 cmd, u16 word, uint ncmds)
{
char __iomem *vaddr;
struct __iomem cm_t *cm_addr;
uint count;
uint n;
u16 head;
u16 tail;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
/*
* Check if board is still alive.
*/
if (ch->ch_bd->state == BOARD_FAILED)
return;
/*
* Make sure the pointers are in range before
* writing to the FEP memory.
*/
vaddr = ch->ch_bd->re_map_membase;
if (!vaddr)
return;
cm_addr = (struct cm_t __iomem *)(vaddr + CMDBUF);
head = readw(&cm_addr->cm_head);
/*
* Forget it if pointers out of range.
*/
if (head >= (CMDMAX - CMDSTART) || (head & 03)) {
ch->ch_bd->state = BOARD_FAILED;
return;
}
/*
* Put the data in the circular command buffer.
*/
writeb(cmd, (vaddr + head + CMDSTART + 0));
writeb((u8)ch->ch_portnum, (vaddr + head + CMDSTART + 1));
writew((u16)word, (vaddr + head + CMDSTART + 2));
head = (head + 4) & (CMDMAX - CMDSTART - 4);
writew(head, &cm_addr->cm_head);
/*
* Wait if necessary before updating the head
* pointer to limit the number of outstanding
* commands to the FEP. If the time spent waiting
* is outlandish, declare the FEP dead.
*/
for (count = dgap_count ;;) {
head = readw(&cm_addr->cm_head);
tail = readw(&cm_addr->cm_tail);
n = (head - tail) & (CMDMAX - CMDSTART - 4);
if (n <= ncmds * sizeof(struct cm_t))
break;
if (--count == 0) {
ch->ch_bd->state = BOARD_FAILED;
return;
}
udelay(10);
}
}
/*=======================================================================
*
* dgap_cmdw_ext - Sends a extended word command to the FEP.
*
* ch - Pointer to channel structure.
* cmd - Command to be sent.
* word - Integer containing word to be sent.
* ncmds - Wait until ncmds or fewer cmds are left
* in the cmd buffer before returning.
*
*=======================================================================*/
static void dgap_cmdw_ext(struct channel_t *ch, u16 cmd, u16 word, uint ncmds)
{
char __iomem *vaddr;
struct __iomem cm_t *cm_addr;
uint count;
uint n;
u16 head;
u16 tail;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
/*
* Check if board is still alive.
*/
if (ch->ch_bd->state == BOARD_FAILED)
return;
/*
* Make sure the pointers are in range before
* writing to the FEP memory.
*/
vaddr = ch->ch_bd->re_map_membase;
if (!vaddr)
return;
cm_addr = (struct cm_t __iomem *)(vaddr + CMDBUF);
head = readw(&cm_addr->cm_head);
/*
* Forget it if pointers out of range.
*/
if (head >= (CMDMAX - CMDSTART) || (head & 03)) {
ch->ch_bd->state = BOARD_FAILED;
return;
}
/*
* Put the data in the circular command buffer.
*/
/* Write an FF to tell the FEP that we want an extended command */
writeb((u8)0xff, (vaddr + head + CMDSTART + 0));
writeb((u8)ch->ch_portnum, (vaddr + head + CMDSTART + 1));
writew((u16)cmd, (vaddr + head + CMDSTART + 2));
/*
* If the second part of the command won't fit,
* put it at the beginning of the circular buffer.
*/
if (((head + 4) >= ((CMDMAX - CMDSTART)) || (head & 03)))
writew((u16)word, (vaddr + CMDSTART));
else
writew((u16)word, (vaddr + head + CMDSTART + 4));
head = (head + 8) & (CMDMAX - CMDSTART - 4);
writew(head, &cm_addr->cm_head);
/*
* Wait if necessary before updating the head
* pointer to limit the number of outstanding
* commands to the FEP. If the time spent waiting
* is outlandish, declare the FEP dead.
*/
for (count = dgap_count ;;) {
head = readw(&cm_addr->cm_head);
tail = readw(&cm_addr->cm_tail);
n = (head - tail) & (CMDMAX - CMDSTART - 4);
if (n <= ncmds * sizeof(struct cm_t))
break;
if (--count == 0) {
ch->ch_bd->state = BOARD_FAILED;
return;
}
udelay(10);
}
}
/*=======================================================================
*
* dgap_wmove - Write data to FEP buffer.
*
* ch - Pointer to channel structure.
* buf - Pointer to characters to be moved.
* cnt - Number of characters to move.
*
*=======================================================================*/
static void dgap_wmove(struct channel_t *ch, char *buf, uint cnt)
{
int n;
char __iomem *taddr;
struct bs_t __iomem *bs;
u16 head;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
/*
* Check parameters.
*/
bs = ch->ch_bs;
head = readw(&bs->tx_head);
/*
* If pointers are out of range, just return.
*/
if ((cnt > ch->ch_tsize) ||
(unsigned)(head - ch->ch_tstart) >= ch->ch_tsize)
return;
/*
* If the write wraps over the top of the circular buffer,
* move the portion up to the wrap point, and reset the
* pointers to the bottom.
*/
n = ch->ch_tstart + ch->ch_tsize - head;
if (cnt >= n) {
cnt -= n;
taddr = ch->ch_taddr + head;
memcpy_toio(taddr, buf, n);
head = ch->ch_tstart;
buf += n;
}
/*
* Move rest of data.
*/
taddr = ch->ch_taddr + head;
n = cnt;
memcpy_toio(taddr, buf, n);
head += cnt;
writew(head, &bs->tx_head);
}
/*
* Calls the firmware to reset this channel.
*/
static void dgap_firmware_reset_port(struct channel_t *ch)
{
dgap_cmdb(ch, CHRESET, 0, 0, 0);
/*
* Now that the channel is reset, we need to make sure
* all the current settings get reapplied to the port
* in the firmware.
*
* So we will set the driver's cache of firmware
* settings all to 0, and then call param.
*/
ch->ch_fepiflag = 0;
ch->ch_fepcflag = 0;
ch->ch_fepoflag = 0;
ch->ch_fepstartc = 0;
ch->ch_fepstopc = 0;
ch->ch_fepastartc = 0;
ch->ch_fepastopc = 0;
ch->ch_mostat = 0;
ch->ch_hflow = 0;
}
/*=======================================================================
*
* dgap_param - Set Digi parameters.
*
* struct tty_struct * - TTY for port.
*
*=======================================================================*/
static int dgap_param(struct channel_t *ch, struct board_t *bd, u32 un_type)
{
u16 head;
u16 cflag;
u16 iflag;
u8 mval;
u8 hflow;
/*
* If baud rate is zero, flush queues, and set mval to drop DTR.
*/
if ((ch->ch_c_cflag & (CBAUD)) == 0) {
/* flush rx */
head = readw(&ch->ch_bs->rx_head);
writew(head, &ch->ch_bs->rx_tail);
/* flush tx */
head = readw(&ch->ch_bs->tx_head);
writew(head, &ch->ch_bs->tx_tail);
ch->ch_flags |= (CH_BAUD0);
/* Drop RTS and DTR */
ch->ch_mval &= ~(D_RTS(ch) | D_DTR(ch));
mval = D_DTR(ch) | D_RTS(ch);
ch->ch_baud_info = 0;
} else if (ch->ch_custom_speed && (bd->bd_flags & BD_FEP5PLUS)) {
/*
* Tell the fep to do the command
*/
dgap_cmdw_ext(ch, 0xff01, ch->ch_custom_speed, 0);
/*
* Now go get from fep mem, what the fep
* believes the custom baud rate is.
*/
ch->ch_custom_speed = dgap_get_custom_baud(ch);
ch->ch_baud_info = ch->ch_custom_speed;
/* Handle transition from B0 */
if (ch->ch_flags & CH_BAUD0) {
ch->ch_flags &= ~(CH_BAUD0);
ch->ch_mval |= (D_RTS(ch) | D_DTR(ch));
}
mval = D_DTR(ch) | D_RTS(ch);
} else {
/*
* Set baud rate, character size, and parity.
*/
int iindex = 0;
int jindex = 0;
int baud = 0;
ulong bauds[4][16] = {
{ /* slowbaud */
0, 50, 75, 110,
134, 150, 200, 300,
600, 1200, 1800, 2400,
4800, 9600, 19200, 38400 },
{ /* slowbaud & CBAUDEX */
0, 57600, 115200, 230400,
460800, 150, 200, 921600,
600, 1200, 1800, 2400,
4800, 9600, 19200, 38400 },
{ /* fastbaud */
0, 57600, 76800, 115200,
14400, 57600, 230400, 76800,
115200, 230400, 28800, 460800,
921600, 9600, 19200, 38400 },
{ /* fastbaud & CBAUDEX */
0, 57600, 115200, 230400,
460800, 150, 200, 921600,
600, 1200, 1800, 2400,
4800, 9600, 19200, 38400 }
};
/*
* Only use the TXPrint baud rate if the
* terminal unit is NOT open
*/
if (!(ch->ch_tun.un_flags & UN_ISOPEN) &&
un_type == DGAP_PRINT)
baud = C_BAUD(ch->ch_pun.un_tty) & 0xff;
else
baud = C_BAUD(ch->ch_tun.un_tty) & 0xff;
if (ch->ch_c_cflag & CBAUDEX)
iindex = 1;
if (ch->ch_digi.digi_flags & DIGI_FAST)
iindex += 2;
jindex = baud;
if ((iindex >= 0) && (iindex < 4) &&
(jindex >= 0) && (jindex < 16))
baud = bauds[iindex][jindex];
else
baud = 0;
if (baud == 0)
baud = 9600;
ch->ch_baud_info = baud;
/*
* CBAUD has bit position 0x1000 set these days to
* indicate Linux baud rate remap.
* We use a different bit assignment for high speed.
* Clear this bit out while grabbing the parts of
* "cflag" we want.
*/
cflag = ch->ch_c_cflag & ((CBAUD ^ CBAUDEX) | PARODD | PARENB |
CSTOPB | CSIZE);
/*
* HUPCL bit is used by FEP to indicate fast baud
* table is to be used.
*/
if ((ch->ch_digi.digi_flags & DIGI_FAST) ||
(ch->ch_c_cflag & CBAUDEX))
cflag |= HUPCL;
if ((ch->ch_c_cflag & CBAUDEX) &&
!(ch->ch_digi.digi_flags & DIGI_FAST)) {
/*
* The below code is trying to guarantee that only
* baud rates 115200, 230400, 460800, 921600 are
* remapped. We use exclusive or because the various
* baud rates share common bit positions and therefore
* can't be tested for easily.
*/
tcflag_t tcflag = (ch->ch_c_cflag & CBAUD) | CBAUDEX;
int baudpart = 0;
/*
* Map high speed requests to index
* into FEP's baud table
*/
switch (tcflag) {
case B57600:
baudpart = 1;
break;
#ifdef B76800
case B76800:
baudpart = 2;
break;
#endif
case B115200:
baudpart = 3;
break;
case B230400:
baudpart = 9;
break;
case B460800:
baudpart = 11;
break;
#ifdef B921600
case B921600:
baudpart = 12;
break;
#endif
default:
baudpart = 0;
}
if (baudpart)
cflag = (cflag & ~(CBAUD | CBAUDEX)) | baudpart;
}
cflag &= 0xffff;
if (cflag != ch->ch_fepcflag) {
ch->ch_fepcflag = (u16)(cflag & 0xffff);
/*
* Okay to have channel and board
* locks held calling this
*/
dgap_cmdw(ch, SCFLAG, (u16)cflag, 0);
}
/* Handle transition from B0 */
if (ch->ch_flags & CH_BAUD0) {
ch->ch_flags &= ~(CH_BAUD0);
ch->ch_mval |= (D_RTS(ch) | D_DTR(ch));
}
mval = D_DTR(ch) | D_RTS(ch);
}
/*
* Get input flags.
*/
iflag = ch->ch_c_iflag & (IGNBRK | BRKINT | IGNPAR | PARMRK |
INPCK | ISTRIP | IXON | IXANY | IXOFF);
if ((ch->ch_startc == _POSIX_VDISABLE) ||
(ch->ch_stopc == _POSIX_VDISABLE)) {
iflag &= ~(IXON | IXOFF);
ch->ch_c_iflag &= ~(IXON | IXOFF);
}
/*
* Only the IBM Xr card can switch between
* 232 and 422 modes on the fly
*/
if (bd->device == PCI_DEV_XR_IBM_DID) {
if (ch->ch_digi.digi_flags & DIGI_422)
dgap_cmdb(ch, SCOMMODE, MODE_422, 0, 0);
else
dgap_cmdb(ch, SCOMMODE, MODE_232, 0, 0);
}
if (ch->ch_digi.digi_flags & DIGI_ALTPIN)
iflag |= IALTPIN;
if (iflag != ch->ch_fepiflag) {
ch->ch_fepiflag = iflag;
/* Okay to have channel and board locks held calling this */
dgap_cmdw(ch, SIFLAG, (u16)ch->ch_fepiflag, 0);
}
/*
* Select hardware handshaking.
*/
hflow = 0;
if (ch->ch_c_cflag & CRTSCTS)
hflow |= (D_RTS(ch) | D_CTS(ch));
if (ch->ch_digi.digi_flags & RTSPACE)
hflow |= D_RTS(ch);
if (ch->ch_digi.digi_flags & DTRPACE)
hflow |= D_DTR(ch);
if (ch->ch_digi.digi_flags & CTSPACE)
hflow |= D_CTS(ch);
if (ch->ch_digi.digi_flags & DSRPACE)
hflow |= D_DSR(ch);
if (ch->ch_digi.digi_flags & DCDPACE)
hflow |= D_CD(ch);
if (hflow != ch->ch_hflow) {
ch->ch_hflow = hflow;
/* Okay to have channel and board locks held calling this */
dgap_cmdb(ch, SHFLOW, (u8)hflow, 0xff, 0);
}
/*
* Set RTS and/or DTR Toggle if needed,
* but only if product is FEP5+ based.
*/
if (bd->bd_flags & BD_FEP5PLUS) {
u16 hflow2 = 0;
if (ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE)
hflow2 |= (D_RTS(ch));
if (ch->ch_digi.digi_flags & DIGI_DTR_TOGGLE)
hflow2 |= (D_DTR(ch));
dgap_cmdw_ext(ch, 0xff03, hflow2, 0);
}
/*
* Set modem control lines.
*/
mval ^= ch->ch_mforce & (mval ^ ch->ch_mval);
if (ch->ch_mostat ^ mval) {
ch->ch_mostat = mval;
/* Okay to have channel and board locks held calling this */
dgap_cmdb(ch, SMODEM, (u8)mval, D_RTS(ch) | D_DTR(ch), 0);
}
/*
* Read modem signals, and then call carrier function.
*/
ch->ch_mistat = readb(&ch->ch_bs->m_stat);
dgap_carrier(ch);
/*
* Set the start and stop characters.
*/
if (ch->ch_startc != ch->ch_fepstartc ||
ch->ch_stopc != ch->ch_fepstopc) {
ch->ch_fepstartc = ch->ch_startc;
ch->ch_fepstopc = ch->ch_stopc;
/* Okay to have channel and board locks held calling this */
dgap_cmdb(ch, SFLOWC, ch->ch_fepstartc, ch->ch_fepstopc, 0);
}
/*
* Set the Auxiliary start and stop characters.
*/
if (ch->ch_astartc != ch->ch_fepastartc ||
ch->ch_astopc != ch->ch_fepastopc) {
ch->ch_fepastartc = ch->ch_astartc;
ch->ch_fepastopc = ch->ch_astopc;
/* Okay to have channel and board locks held calling this */
dgap_cmdb(ch, SAFLOWC, ch->ch_fepastartc, ch->ch_fepastopc, 0);
}
return 0;
}
/*
* dgap_block_til_ready()
*
* Wait for DCD, if needed.
*/
static int dgap_block_til_ready(struct tty_struct *tty, struct file *file,
struct channel_t *ch)
{
int retval = 0;
struct un_t *un;
ulong lock_flags;
uint old_flags;
int sleep_on_un_flags;
if (!tty || tty->magic != TTY_MAGIC || !file || !ch ||
ch->magic != DGAP_CHANNEL_MAGIC)
return -EIO;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return -EIO;
spin_lock_irqsave(&ch->ch_lock, lock_flags);
ch->ch_wopen++;
/* Loop forever */
while (1) {
sleep_on_un_flags = 0;
/*
* If board has failed somehow during our sleep,
* bail with error.
*/
if (ch->ch_bd->state == BOARD_FAILED) {
retval = -EIO;
break;
}
/* If tty was hung up, break out of loop and set error. */
if (tty_hung_up_p(file)) {
retval = -EAGAIN;
break;
}
/*
* If either unit is in the middle of the fragile part of close,
* we just cannot touch the channel safely.
* Go back to sleep, knowing that when the channel can be
* touched safely, the close routine will signal the
* ch_wait_flags to wake us back up.
*/
if (!((ch->ch_tun.un_flags | ch->ch_pun.un_flags) &
UN_CLOSING)) {
/*
* Our conditions to leave cleanly and happily:
* 1) NONBLOCKING on the tty is set.
* 2) CLOCAL is set.
* 3) DCD (fake or real) is active.
*/
if (file->f_flags & O_NONBLOCK)
break;
if (tty->flags & (1 << TTY_IO_ERROR))
break;
if (ch->ch_flags & CH_CD)
break;
if (ch->ch_flags & CH_FCAR)
break;
} else {
sleep_on_un_flags = 1;
}
/*
* If there is a signal pending, the user probably
* interrupted (ctrl-c) us.
* Leave loop with error set.
*/
if (signal_pending(current)) {
retval = -ERESTARTSYS;
break;
}
/*
* Store the flags before we let go of channel lock
*/
if (sleep_on_un_flags)
old_flags = ch->ch_tun.un_flags | ch->ch_pun.un_flags;
else
old_flags = ch->ch_flags;
/*
* Let go of channel lock before calling schedule.
* Our poller will get any FEP events and wake us up when DCD
* eventually goes active.
*/
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
/*
* Wait for something in the flags to change
* from the current value.
*/
if (sleep_on_un_flags) {
retval = wait_event_interruptible(un->un_flags_wait,
(old_flags != (ch->ch_tun.un_flags |
ch->ch_pun.un_flags)));
} else {
retval = wait_event_interruptible(ch->ch_flags_wait,
(old_flags != ch->ch_flags));
}
/*
* We got woken up for some reason.
* Before looping around, grab our channel lock.
*/
spin_lock_irqsave(&ch->ch_lock, lock_flags);
}
ch->ch_wopen--;
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
return retval;
}
/*
* dgap_tty_flush_buffer()
*
* Flush Tx buffer (make in == out)
*/
static void dgap_tty_flush_buffer(struct tty_struct *tty)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
ulong lock_flags;
ulong lock_flags2;
u16 head;
if (!tty || tty->magic != TTY_MAGIC)
return;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
ch->ch_flags &= ~CH_STOP;
head = readw(&ch->ch_bs->tx_head);
dgap_cmdw(ch, FLUSHTX, (u16)head, 0);
dgap_cmdw(ch, RESUMETX, 0, 0);
if (ch->ch_tun.un_flags & (UN_LOW | UN_EMPTY)) {
ch->ch_tun.un_flags &= ~(UN_LOW | UN_EMPTY);
wake_up_interruptible(&ch->ch_tun.un_flags_wait);
}
if (ch->ch_pun.un_flags & (UN_LOW | UN_EMPTY)) {
ch->ch_pun.un_flags &= ~(UN_LOW | UN_EMPTY);
wake_up_interruptible(&ch->ch_pun.un_flags_wait);
}
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
if (waitqueue_active(&tty->write_wait))
wake_up_interruptible(&tty->write_wait);
tty_wakeup(tty);
}
/*
* dgap_tty_hangup()
*
* Hangup the port. Like a close, but don't wait for output to drain.
*/
static void dgap_tty_hangup(struct tty_struct *tty)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
if (!tty || tty->magic != TTY_MAGIC)
return;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return;
/* flush the transmit queues */
dgap_tty_flush_buffer(tty);
}
/*
* dgap_tty_chars_in_buffer()
*
* Return number of characters that have not been transmitted yet.
*
* This routine is used by the line discipline to determine if there
* is data waiting to be transmitted/drained/flushed or not.
*/
static int dgap_tty_chars_in_buffer(struct tty_struct *tty)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
struct bs_t __iomem *bs;
u8 tbusy;
uint chars;
u16 thead, ttail, tmask, chead, ctail;
ulong lock_flags = 0;
ulong lock_flags2 = 0;
if (!tty)
return 0;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return 0;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return 0;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return 0;
bs = ch->ch_bs;
if (!bs)
return 0;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
tmask = (ch->ch_tsize - 1);
/* Get Transmit queue pointers */
thead = readw(&bs->tx_head) & tmask;
ttail = readw(&bs->tx_tail) & tmask;
/* Get tbusy flag */
tbusy = readb(&bs->tbusy);
/* Get Command queue pointers */
chead = readw(&ch->ch_cm->cm_head);
ctail = readw(&ch->ch_cm->cm_tail);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
/*
* The only way we know for sure if there is no pending
* data left to be transferred, is if:
* 1) Transmit head and tail are equal (empty).
* 2) Command queue head and tail are equal (empty).
* 3) The "TBUSY" flag is 0. (Transmitter not busy).
*/
if ((ttail == thead) && (tbusy == 0) && (chead == ctail)) {
chars = 0;
} else {
if (thead >= ttail)
chars = thead - ttail;
else
chars = thead - ttail + ch->ch_tsize;
/*
* Fudge factor here.
* If chars is zero, we know that the command queue had
* something in it or tbusy was set. Because we cannot
* be sure if there is still some data to be transmitted,
* lets lie, and tell ld we have 1 byte left.
*/
if (chars == 0) {
/*
* If TBUSY is still set, and our tx buffers are empty,
* force the firmware to send me another wakeup after
* TBUSY has been cleared.
*/
if (tbusy != 0) {
spin_lock_irqsave(&ch->ch_lock, lock_flags);
un->un_flags |= UN_EMPTY;
writeb(1, &bs->iempty);
spin_unlock_irqrestore(&ch->ch_lock,
lock_flags);
}
chars = 1;
}
}
return chars;
}
static int dgap_wait_for_drain(struct tty_struct *tty)
{
struct channel_t *ch;
struct un_t *un;
struct bs_t __iomem *bs;
int ret = 0;
uint count = 1;
ulong lock_flags = 0;
if (!tty || tty->magic != TTY_MAGIC)
return -EIO;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return -EIO;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return -EIO;
bs = ch->ch_bs;
if (!bs)
return -EIO;
/* Loop until data is drained */
while (count != 0) {
count = dgap_tty_chars_in_buffer(tty);
if (count == 0)
break;
/* Set flag waiting for drain */
spin_lock_irqsave(&ch->ch_lock, lock_flags);
un->un_flags |= UN_EMPTY;
writeb(1, &bs->iempty);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
/* Go to sleep till we get woken up */
ret = wait_event_interruptible(un->un_flags_wait,
((un->un_flags & UN_EMPTY) == 0));
/* If ret is non-zero, user ctrl-c'ed us */
if (ret)
break;
}
spin_lock_irqsave(&ch->ch_lock, lock_flags);
un->un_flags &= ~(UN_EMPTY);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
return ret;
}
/*
* dgap_maxcps_room
*
* Reduces bytes_available to the max number of characters
* that can be sent currently given the maxcps value, and
* returns the new bytes_available. This only affects printer
* output.
*/
static int dgap_maxcps_room(struct channel_t *ch, struct un_t *un,
int bytes_available)
{
/*
* If its not the Transparent print device, return
* the full data amount.
*/
if (un->un_type != DGAP_PRINT)
return bytes_available;
if (ch->ch_digi.digi_maxcps > 0 && ch->ch_digi.digi_bufsize > 0) {
int cps_limit = 0;
unsigned long current_time = jiffies;
unsigned long buffer_time = current_time +
(HZ * ch->ch_digi.digi_bufsize) /
ch->ch_digi.digi_maxcps;
if (ch->ch_cpstime < current_time) {
/* buffer is empty */
ch->ch_cpstime = current_time; /* reset ch_cpstime */
cps_limit = ch->ch_digi.digi_bufsize;
} else if (ch->ch_cpstime < buffer_time) {
/* still room in the buffer */
cps_limit = ((buffer_time - ch->ch_cpstime) *
ch->ch_digi.digi_maxcps) / HZ;
} else {
/* no room in the buffer */
cps_limit = 0;
}
bytes_available = min(cps_limit, bytes_available);
}
return bytes_available;
}
static inline void dgap_set_firmware_event(struct un_t *un, unsigned int event)
{
struct channel_t *ch;
struct bs_t __iomem *bs;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
bs = ch->ch_bs;
if (!bs)
return;
if ((event & UN_LOW) != 0) {
if ((un->un_flags & UN_LOW) == 0) {
un->un_flags |= UN_LOW;
writeb(1, &bs->ilow);
}
}
if ((event & UN_LOW) != 0) {
if ((un->un_flags & UN_EMPTY) == 0) {
un->un_flags |= UN_EMPTY;
writeb(1, &bs->iempty);
}
}
}
/*
* dgap_tty_write_room()
*
* Return space available in Tx buffer
*/
static int dgap_tty_write_room(struct tty_struct *tty)
{
struct channel_t *ch;
struct un_t *un;
struct bs_t __iomem *bs;
u16 head, tail, tmask;
int ret;
ulong lock_flags = 0;
if (!tty)
return 0;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return 0;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return 0;
bs = ch->ch_bs;
if (!bs)
return 0;
spin_lock_irqsave(&ch->ch_lock, lock_flags);
tmask = ch->ch_tsize - 1;
head = readw(&bs->tx_head) & tmask;
tail = readw(&bs->tx_tail) & tmask;
ret = tail - head - 1;
if (ret < 0)
ret += ch->ch_tsize;
/* Limit printer to maxcps */
ret = dgap_maxcps_room(ch, un, ret);
/*
* If we are printer device, leave space for
* possibly both the on and off strings.
*/
if (un->un_type == DGAP_PRINT) {
if (!(ch->ch_flags & CH_PRON))
ret -= ch->ch_digi.digi_onlen;
ret -= ch->ch_digi.digi_offlen;
} else {
if (ch->ch_flags & CH_PRON)
ret -= ch->ch_digi.digi_offlen;
}
if (ret < 0)
ret = 0;
/*
* Schedule FEP to wake us up if needed.
*
* TODO: This might be overkill...
* Do we really need to schedule callbacks from the FEP
* in every case? Can we get smarter based on ret?
*/
dgap_set_firmware_event(un, UN_LOW | UN_EMPTY);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
return ret;
}
/*
* dgap_tty_write()
*
* Take data from the user or kernel and send it out to the FEP.
* In here exists all the Transparent Print magic as well.
*/
static int dgap_tty_write(struct tty_struct *tty, const unsigned char *buf,
int count)
{
struct channel_t *ch;
struct un_t *un;
struct bs_t __iomem *bs;
char __iomem *vaddr;
u16 head, tail, tmask, remain;
int bufcount, n;
ulong lock_flags;
if (!tty)
return 0;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return 0;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return 0;
bs = ch->ch_bs;
if (!bs)
return 0;
if (!count)
return 0;
spin_lock_irqsave(&ch->ch_lock, lock_flags);
/* Get our space available for the channel from the board */
tmask = ch->ch_tsize - 1;
head = readw(&(bs->tx_head)) & tmask;
tail = readw(&(bs->tx_tail)) & tmask;
bufcount = tail - head - 1;
if (bufcount < 0)
bufcount += ch->ch_tsize;
/*
* Limit printer output to maxcps overall, with bursts allowed
* up to bufsize characters.
*/
bufcount = dgap_maxcps_room(ch, un, bufcount);
/*
* Take minimum of what the user wants to send, and the
* space available in the FEP buffer.
*/
count = min(count, bufcount);
/*
* Bail if no space left.
*/
if (count <= 0) {
dgap_set_firmware_event(un, UN_LOW | UN_EMPTY);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
return 0;
}
/*
* Output the printer ON string, if we are in terminal mode, but
* need to be in printer mode.
*/
if ((un->un_type == DGAP_PRINT) && !(ch->ch_flags & CH_PRON)) {
dgap_wmove(ch, ch->ch_digi.digi_onstr,
(int)ch->ch_digi.digi_onlen);
head = readw(&bs->tx_head) & tmask;
ch->ch_flags |= CH_PRON;
}
/*
* On the other hand, output the printer OFF string, if we are
* currently in printer mode, but need to output to the terminal.
*/
if ((un->un_type != DGAP_PRINT) && (ch->ch_flags & CH_PRON)) {
dgap_wmove(ch, ch->ch_digi.digi_offstr,
(int)ch->ch_digi.digi_offlen);
head = readw(&bs->tx_head) & tmask;
ch->ch_flags &= ~CH_PRON;
}
n = count;
/*
* If the write wraps over the top of the circular buffer,
* move the portion up to the wrap point, and reset the
* pointers to the bottom.
*/
remain = ch->ch_tstart + ch->ch_tsize - head;
if (n >= remain) {
n -= remain;
vaddr = ch->ch_taddr + head;
memcpy_toio(vaddr, (u8 *)buf, remain);
head = ch->ch_tstart;
buf += remain;
}
if (n > 0) {
/*
* Move rest of data.
*/
vaddr = ch->ch_taddr + head;
remain = n;
memcpy_toio(vaddr, (u8 *)buf, remain);
head += remain;
}
if (count) {
ch->ch_txcount += count;
head &= tmask;
writew(head, &bs->tx_head);
}
dgap_set_firmware_event(un, UN_LOW | UN_EMPTY);
/*
* If this is the print device, and the
* printer is still on, we need to turn it
* off before going idle. If the buffer is
* non-empty, wait until it goes empty.
* Otherwise turn it off right now.
*/
if ((un->un_type == DGAP_PRINT) && (ch->ch_flags & CH_PRON)) {
tail = readw(&bs->tx_tail) & tmask;
if (tail != head) {
un->un_flags |= UN_EMPTY;
writeb(1, &bs->iempty);
} else {
dgap_wmove(ch, ch->ch_digi.digi_offstr,
(int)ch->ch_digi.digi_offlen);
head = readw(&bs->tx_head) & tmask;
ch->ch_flags &= ~CH_PRON;
}
}
/* Update printer buffer empty time. */
if ((un->un_type == DGAP_PRINT) && (ch->ch_digi.digi_maxcps > 0)
&& (ch->ch_digi.digi_bufsize > 0)) {
ch->ch_cpstime += (HZ * count) / ch->ch_digi.digi_maxcps;
}
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
return count;
}
/*
* dgap_tty_put_char()
*
* Put a character into ch->ch_buf
*
* - used by the line discipline for OPOST processing
*/
static int dgap_tty_put_char(struct tty_struct *tty, unsigned char c)
{
/*
* Simply call tty_write.
*/
dgap_tty_write(tty, &c, 1);
return 1;
}
/*
* Return modem signals to ld.
*/
static int dgap_tty_tiocmget(struct tty_struct *tty)
{
struct channel_t *ch;
struct un_t *un;
int result;
u8 mstat;
ulong lock_flags;
if (!tty || tty->magic != TTY_MAGIC)
return -EIO;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return -EIO;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return -EIO;
spin_lock_irqsave(&ch->ch_lock, lock_flags);
mstat = readb(&ch->ch_bs->m_stat);
/* Append any outbound signals that might be pending... */
mstat |= ch->ch_mostat;
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
result = 0;
if (mstat & D_DTR(ch))
result |= TIOCM_DTR;
if (mstat & D_RTS(ch))
result |= TIOCM_RTS;
if (mstat & D_CTS(ch))
result |= TIOCM_CTS;
if (mstat & D_DSR(ch))
result |= TIOCM_DSR;
if (mstat & D_RI(ch))
result |= TIOCM_RI;
if (mstat & D_CD(ch))
result |= TIOCM_CD;
return result;
}
/*
* dgap_tty_tiocmset()
*
* Set modem signals, called by ld.
*/
static int dgap_tty_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
ulong lock_flags;
ulong lock_flags2;
if (!tty || tty->magic != TTY_MAGIC)
return -EIO;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return -EIO;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return -EIO;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return -EIO;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
if (set & TIOCM_RTS) {
ch->ch_mforce |= D_RTS(ch);
ch->ch_mval |= D_RTS(ch);
}
if (set & TIOCM_DTR) {
ch->ch_mforce |= D_DTR(ch);
ch->ch_mval |= D_DTR(ch);
}
if (clear & TIOCM_RTS) {
ch->ch_mforce |= D_RTS(ch);
ch->ch_mval &= ~(D_RTS(ch));
}
if (clear & TIOCM_DTR) {
ch->ch_mforce |= D_DTR(ch);
ch->ch_mval &= ~(D_DTR(ch));
}
dgap_param(ch, bd, un->un_type);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return 0;
}
/*
* dgap_tty_send_break()
*
* Send a Break, called by ld.
*/
static int dgap_tty_send_break(struct tty_struct *tty, int msec)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
ulong lock_flags;
ulong lock_flags2;
if (!tty || tty->magic != TTY_MAGIC)
return -EIO;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return -EIO;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return -EIO;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return -EIO;
switch (msec) {
case -1:
msec = 0xFFFF;
break;
case 0:
msec = 1;
break;
default:
msec /= 10;
break;
}
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
#if 0
dgap_cmdw(ch, SBREAK, (u16) SBREAK_TIME, 0);
#endif
dgap_cmdw(ch, SBREAK, (u16)msec, 0);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return 0;
}
/*
* dgap_tty_wait_until_sent()
*
* wait until data has been transmitted, called by ld.
*/
static void dgap_tty_wait_until_sent(struct tty_struct *tty, int timeout)
{
dgap_wait_for_drain(tty);
}
/*
* dgap_send_xchar()
*
* send a high priority character, called by ld.
*/
static void dgap_tty_send_xchar(struct tty_struct *tty, char c)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
ulong lock_flags;
ulong lock_flags2;
if (!tty || tty->magic != TTY_MAGIC)
return;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
/*
* This is technically what we should do.
* However, the NIST tests specifically want
* to see each XON or XOFF character that it
* sends, so lets just send each character
* by hand...
*/
#if 0
if (c == STOP_CHAR(tty))
dgap_cmdw(ch, RPAUSE, 0, 0);
else if (c == START_CHAR(tty))
dgap_cmdw(ch, RRESUME, 0, 0);
else
dgap_wmove(ch, &c, 1);
#else
dgap_wmove(ch, &c, 1);
#endif
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
}
/*
* Return modem signals to ld.
*/
static int dgap_get_modem_info(struct channel_t *ch, unsigned int __user *value)
{
int result;
u8 mstat;
ulong lock_flags;
spin_lock_irqsave(&ch->ch_lock, lock_flags);
mstat = readb(&ch->ch_bs->m_stat);
/* Append any outbound signals that might be pending... */
mstat |= ch->ch_mostat;
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
result = 0;
if (mstat & D_DTR(ch))
result |= TIOCM_DTR;
if (mstat & D_RTS(ch))
result |= TIOCM_RTS;
if (mstat & D_CTS(ch))
result |= TIOCM_CTS;
if (mstat & D_DSR(ch))
result |= TIOCM_DSR;
if (mstat & D_RI(ch))
result |= TIOCM_RI;
if (mstat & D_CD(ch))
result |= TIOCM_CD;
return put_user(result, value);
}
/*
* dgap_set_modem_info()
*
* Set modem signals, called by ld.
*/
static int dgap_set_modem_info(struct channel_t *ch, struct board_t *bd,
struct un_t *un, unsigned int command,
unsigned int __user *value)
{
int ret;
unsigned int arg;
ulong lock_flags;
ulong lock_flags2;
ret = get_user(arg, value);
if (ret)
return ret;
switch (command) {
case TIOCMBIS:
if (arg & TIOCM_RTS) {
ch->ch_mforce |= D_RTS(ch);
ch->ch_mval |= D_RTS(ch);
}
if (arg & TIOCM_DTR) {
ch->ch_mforce |= D_DTR(ch);
ch->ch_mval |= D_DTR(ch);
}
break;
case TIOCMBIC:
if (arg & TIOCM_RTS) {
ch->ch_mforce |= D_RTS(ch);
ch->ch_mval &= ~(D_RTS(ch));
}
if (arg & TIOCM_DTR) {
ch->ch_mforce |= D_DTR(ch);
ch->ch_mval &= ~(D_DTR(ch));
}
break;
case TIOCMSET:
ch->ch_mforce = D_DTR(ch) | D_RTS(ch);
if (arg & TIOCM_RTS)
ch->ch_mval |= D_RTS(ch);
else
ch->ch_mval &= ~(D_RTS(ch));
if (arg & TIOCM_DTR)
ch->ch_mval |= (D_DTR(ch));
else
ch->ch_mval &= ~(D_DTR(ch));
break;
default:
return -EINVAL;
}
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
dgap_param(ch, bd, un->un_type);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return 0;
}
/*
* dgap_tty_digigeta()
*
* Ioctl to get the information for ditty.
*
*
*
*/
static int dgap_tty_digigeta(struct channel_t *ch,
struct digi_t __user *retinfo)
{
struct digi_t tmp;
ulong lock_flags;
if (!retinfo)
return -EFAULT;
memset(&tmp, 0, sizeof(tmp));
spin_lock_irqsave(&ch->ch_lock, lock_flags);
memcpy(&tmp, &ch->ch_digi, sizeof(tmp));
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
return 0;
}
/*
* dgap_tty_digiseta()
*
* Ioctl to set the information for ditty.
*
*
*
*/
static int dgap_tty_digiseta(struct channel_t *ch, struct board_t *bd,
struct un_t *un, struct digi_t __user *new_info)
{
struct digi_t new_digi;
ulong lock_flags = 0;
unsigned long lock_flags2;
if (copy_from_user(&new_digi, new_info, sizeof(struct digi_t)))
return -EFAULT;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
memcpy(&ch->ch_digi, &new_digi, sizeof(struct digi_t));
if (ch->ch_digi.digi_maxcps < 1)
ch->ch_digi.digi_maxcps = 1;
if (ch->ch_digi.digi_maxcps > 10000)
ch->ch_digi.digi_maxcps = 10000;
if (ch->ch_digi.digi_bufsize < 10)
ch->ch_digi.digi_bufsize = 10;
if (ch->ch_digi.digi_maxchar < 1)
ch->ch_digi.digi_maxchar = 1;
if (ch->ch_digi.digi_maxchar > ch->ch_digi.digi_bufsize)
ch->ch_digi.digi_maxchar = ch->ch_digi.digi_bufsize;
if (ch->ch_digi.digi_onlen > DIGI_PLEN)
ch->ch_digi.digi_onlen = DIGI_PLEN;
if (ch->ch_digi.digi_offlen > DIGI_PLEN)
ch->ch_digi.digi_offlen = DIGI_PLEN;
dgap_param(ch, bd, un->un_type);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return 0;
}
/*
* dgap_tty_digigetedelay()
*
* Ioctl to get the current edelay setting.
*
*
*
*/
static int dgap_tty_digigetedelay(struct tty_struct *tty, int __user *retinfo)
{
struct channel_t *ch;
struct un_t *un;
int tmp;
ulong lock_flags;
if (!retinfo)
return -EFAULT;
if (!tty || tty->magic != TTY_MAGIC)
return -EFAULT;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return -EFAULT;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return -EFAULT;
memset(&tmp, 0, sizeof(tmp));
spin_lock_irqsave(&ch->ch_lock, lock_flags);
tmp = readw(&ch->ch_bs->edelay);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
return 0;
}
/*
* dgap_tty_digisetedelay()
*
* Ioctl to set the EDELAY setting
*
*/
static int dgap_tty_digisetedelay(struct channel_t *ch, struct board_t *bd,
struct un_t *un, int __user *new_info)
{
int new_digi;
ulong lock_flags;
ulong lock_flags2;
if (copy_from_user(&new_digi, new_info, sizeof(int)))
return -EFAULT;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
writew((u16)new_digi, &ch->ch_bs->edelay);
dgap_param(ch, bd, un->un_type);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return 0;
}
/*
* dgap_tty_digigetcustombaud()
*
* Ioctl to get the current custom baud rate setting.
*/
static int dgap_tty_digigetcustombaud(struct channel_t *ch, struct un_t *un,
int __user *retinfo)
{
int tmp;
ulong lock_flags;
if (!retinfo)
return -EFAULT;
memset(&tmp, 0, sizeof(tmp));
spin_lock_irqsave(&ch->ch_lock, lock_flags);
tmp = dgap_get_custom_baud(ch);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
return 0;
}
/*
* dgap_tty_digisetcustombaud()
*
* Ioctl to set the custom baud rate setting
*/
static int dgap_tty_digisetcustombaud(struct channel_t *ch, struct board_t *bd,
struct un_t *un, int __user *new_info)
{
uint new_rate;
ulong lock_flags;
ulong lock_flags2;
if (copy_from_user(&new_rate, new_info, sizeof(unsigned int)))
return -EFAULT;
if (bd->bd_flags & BD_FEP5PLUS) {
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
ch->ch_custom_speed = new_rate;
dgap_param(ch, bd, un->un_type);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
}
return 0;
}
/*
* dgap_set_termios()
*/
static void dgap_tty_set_termios(struct tty_struct *tty,
struct ktermios *old_termios)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
unsigned long lock_flags;
unsigned long lock_flags2;
if (!tty || tty->magic != TTY_MAGIC)
return;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
ch->ch_c_cflag = tty->termios.c_cflag;
ch->ch_c_iflag = tty->termios.c_iflag;
ch->ch_c_oflag = tty->termios.c_oflag;
ch->ch_c_lflag = tty->termios.c_lflag;
ch->ch_startc = tty->termios.c_cc[VSTART];
ch->ch_stopc = tty->termios.c_cc[VSTOP];
dgap_carrier(ch);
dgap_param(ch, bd, un->un_type);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
}
static void dgap_tty_throttle(struct tty_struct *tty)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
ulong lock_flags;
ulong lock_flags2;
if (!tty || tty->magic != TTY_MAGIC)
return;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
ch->ch_flags |= (CH_RXBLOCK);
#if 1
dgap_cmdw(ch, RPAUSE, 0, 0);
#endif
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
}
static void dgap_tty_unthrottle(struct tty_struct *tty)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
ulong lock_flags;
ulong lock_flags2;
if (!tty || tty->magic != TTY_MAGIC)
return;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
ch->ch_flags &= ~(CH_RXBLOCK);
#if 1
dgap_cmdw(ch, RRESUME, 0, 0);
#endif
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
}
static struct board_t *find_board_by_major(unsigned int major)
{
unsigned int i;
for (i = 0; i < MAXBOARDS; i++) {
struct board_t *brd = dgap_board[i];
if (!brd)
return NULL;
if (major == brd->serial_driver->major ||
major == brd->print_driver->major)
return brd;
}
return NULL;
}
/************************************************************************
*
* TTY Entry points and helper functions
*
************************************************************************/
/*
* dgap_tty_open()
*
*/
static int dgap_tty_open(struct tty_struct *tty, struct file *file)
{
struct board_t *brd;
struct channel_t *ch;
struct un_t *un;
struct bs_t __iomem *bs;
uint major;
uint minor;
int rc;
ulong lock_flags;
ulong lock_flags2;
u16 head;
major = MAJOR(tty_devnum(tty));
minor = MINOR(tty_devnum(tty));
brd = find_board_by_major(major);
if (!brd)
return -EIO;
/*
* If board is not yet up to a state of READY, go to
* sleep waiting for it to happen or they cancel the open.
*/
rc = wait_event_interruptible(brd->state_wait,
(brd->state & BOARD_READY));
if (rc)
return rc;
spin_lock_irqsave(&brd->bd_lock, lock_flags);
/* The wait above should guarantee this cannot happen */
if (brd->state != BOARD_READY) {
spin_unlock_irqrestore(&brd->bd_lock, lock_flags);
return -EIO;
}
/* If opened device is greater than our number of ports, bail. */
if (MINOR(tty_devnum(tty)) > brd->nasync) {
spin_unlock_irqrestore(&brd->bd_lock, lock_flags);
return -EIO;
}
ch = brd->channels[minor];
if (!ch) {
spin_unlock_irqrestore(&brd->bd_lock, lock_flags);
return -EIO;
}
/* Grab channel lock */
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
/* Figure out our type */
if (major == brd->serial_driver->major) {
un = &brd->channels[minor]->ch_tun;
un->un_type = DGAP_SERIAL;
} else if (major == brd->print_driver->major) {
un = &brd->channels[minor]->ch_pun;
un->un_type = DGAP_PRINT;
} else {
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&brd->bd_lock, lock_flags);
return -EIO;
}
/* Store our unit into driver_data, so we always have it available. */
tty->driver_data = un;
/*
* Error if channel info pointer is NULL.
*/
bs = ch->ch_bs;
if (!bs) {
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&brd->bd_lock, lock_flags);
return -EIO;
}
/*
* Initialize tty's
*/
if (!(un->un_flags & UN_ISOPEN)) {
/* Store important variables. */
un->un_tty = tty;
/* Maybe do something here to the TTY struct as well? */
}
/*
* Initialize if neither terminal or printer is open.
*/
if (!((ch->ch_tun.un_flags | ch->ch_pun.un_flags) & UN_ISOPEN)) {
ch->ch_mforce = 0;
ch->ch_mval = 0;
/*
* Flush input queue.
*/
head = readw(&bs->rx_head);
writew(head, &bs->rx_tail);
ch->ch_flags = 0;
ch->pscan_state = 0;
ch->pscan_savechar = 0;
ch->ch_c_cflag = tty->termios.c_cflag;
ch->ch_c_iflag = tty->termios.c_iflag;
ch->ch_c_oflag = tty->termios.c_oflag;
ch->ch_c_lflag = tty->termios.c_lflag;
ch->ch_startc = tty->termios.c_cc[VSTART];
ch->ch_stopc = tty->termios.c_cc[VSTOP];
/* TODO: flush our TTY struct here? */
}
dgap_carrier(ch);
/*
* Run param in case we changed anything
*/
dgap_param(ch, brd, un->un_type);
/*
* follow protocol for opening port
*/
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&brd->bd_lock, lock_flags);
rc = dgap_block_til_ready(tty, file, ch);
if (!un->un_tty)
return -ENODEV;
/* No going back now, increment our unit and channel counters */
spin_lock_irqsave(&ch->ch_lock, lock_flags);
ch->ch_open_count++;
un->un_open_count++;
un->un_flags |= (UN_ISOPEN);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
return rc;
}
/*
* dgap_tty_close()
*
*/
static void dgap_tty_close(struct tty_struct *tty, struct file *file)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
ulong lock_flags;
if (!tty || tty->magic != TTY_MAGIC)
return;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return;
spin_lock_irqsave(&ch->ch_lock, lock_flags);
/*
* Determine if this is the last close or not - and if we agree about
* which type of close it is with the Line Discipline
*/
if ((tty->count == 1) && (un->un_open_count != 1)) {
/*
* Uh, oh. tty->count is 1, which means that the tty
* structure will be freed. un_open_count should always
* be one in these conditions. If it's greater than
* one, we've got real problems, since it means the
* serial port won't be shutdown.
*/
un->un_open_count = 1;
}
if (--un->un_open_count < 0)
un->un_open_count = 0;
ch->ch_open_count--;
if (ch->ch_open_count && un->un_open_count) {
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
return;
}
/* OK, its the last close on the unit */
un->un_flags |= UN_CLOSING;
tty->closing = 1;
/*
* Only officially close channel if count is 0 and
* DIGI_PRINTER bit is not set.
*/
if ((ch->ch_open_count == 0) &&
!(ch->ch_digi.digi_flags & DIGI_PRINTER)) {
ch->ch_flags &= ~(CH_RXBLOCK);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
/* wait for output to drain */
/* This will also return if we take an interrupt */
dgap_wait_for_drain(tty);
dgap_tty_flush_buffer(tty);
tty_ldisc_flush(tty);
spin_lock_irqsave(&ch->ch_lock, lock_flags);
tty->closing = 0;
/*
* If we have HUPCL set, lower DTR and RTS
*/
if (ch->ch_c_cflag & HUPCL) {
ch->ch_mostat &= ~(D_RTS(ch) | D_DTR(ch));
dgap_cmdb(ch, SMODEM, 0, D_DTR(ch) | D_RTS(ch), 0);
/*
* Go to sleep to ensure RTS/DTR
* have been dropped for modems to see it.
*/
spin_unlock_irqrestore(&ch->ch_lock,
lock_flags);
/* .25 second delay for dropping RTS/DTR */
schedule_timeout_interruptible(msecs_to_jiffies(250));
spin_lock_irqsave(&ch->ch_lock, lock_flags);
}
ch->pscan_state = 0;
ch->pscan_savechar = 0;
ch->ch_baud_info = 0;
}
/*
* turn off print device when closing print device.
*/
if ((un->un_type == DGAP_PRINT) && (ch->ch_flags & CH_PRON)) {
dgap_wmove(ch, ch->ch_digi.digi_offstr,
(int)ch->ch_digi.digi_offlen);
ch->ch_flags &= ~CH_PRON;
}
un->un_tty = NULL;
un->un_flags &= ~(UN_ISOPEN | UN_CLOSING);
tty->driver_data = NULL;
wake_up_interruptible(&ch->ch_flags_wait);
wake_up_interruptible(&un->un_flags_wait);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags);
}
static void dgap_tty_start(struct tty_struct *tty)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
ulong lock_flags;
ulong lock_flags2;
if (!tty || tty->magic != TTY_MAGIC)
return;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
dgap_cmdw(ch, RESUMETX, 0, 0);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
}
static void dgap_tty_stop(struct tty_struct *tty)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
ulong lock_flags;
ulong lock_flags2;
if (!tty || tty->magic != TTY_MAGIC)
return;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
dgap_cmdw(ch, PAUSETX, 0, 0);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
}
/*
* dgap_tty_flush_chars()
*
* Flush the cook buffer
*
* Note to self, and any other poor souls who venture here:
*
* flush in this case DOES NOT mean dispose of the data.
* instead, it means "stop buffering and send it if you
* haven't already." Just guess how I figured that out... SRW 2-Jun-98
*
* It is also always called in interrupt context - JAR 8-Sept-99
*/
static void dgap_tty_flush_chars(struct tty_struct *tty)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
ulong lock_flags;
ulong lock_flags2;
if (!tty || tty->magic != TTY_MAGIC)
return;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
/* TODO: Do something here */
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
}
/*****************************************************************************
*
* The IOCTL function and all of its helpers
*
*****************************************************************************/
/*
* dgap_tty_ioctl()
*
* The usual assortment of ioctl's
*/
static int dgap_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
unsigned long arg)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
int rc;
u16 head;
ulong lock_flags = 0;
ulong lock_flags2 = 0;
void __user *uarg = (void __user *)arg;
if (!tty || tty->magic != TTY_MAGIC)
return -ENODEV;
un = tty->driver_data;
if (!un || un->magic != DGAP_UNIT_MAGIC)
return -ENODEV;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return -ENODEV;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return -ENODEV;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
if (un->un_open_count <= 0) {
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return -EIO;
}
switch (cmd) {
/* Here are all the standard ioctl's that we MUST implement */
case TCSBRK:
/*
* TCSBRK is SVID version: non-zero arg --> no break
* this behaviour is exploited by tcdrain().
*
* According to POSIX.1 spec (7.2.2.1.2) breaks should be
* between 0.25 and 0.5 seconds so we'll ask for something
* in the middle: 0.375 seconds.
*/
rc = tty_check_change(tty);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
if (rc)
return rc;
rc = dgap_wait_for_drain(tty);
if (rc)
return -EINTR;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
if (((cmd == TCSBRK) && (!arg)) || (cmd == TCSBRKP))
dgap_cmdw(ch, SBREAK, (u16)SBREAK_TIME, 0);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return 0;
case TCSBRKP:
/* support for POSIX tcsendbreak()
* According to POSIX.1 spec (7.2.2.1.2) breaks should be
* between 0.25 and 0.5 seconds so we'll ask for something
* in the middle: 0.375 seconds.
*/
rc = tty_check_change(tty);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
if (rc)
return rc;
rc = dgap_wait_for_drain(tty);
if (rc)
return -EINTR;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
dgap_cmdw(ch, SBREAK, (u16)SBREAK_TIME, 0);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return 0;
case TIOCSBRK:
/*
* FEP5 doesn't support turning on a break unconditionally.
* The FEP5 device will stop sending a break automatically
* after the specified time value that was sent when turning on
* the break.
*/
rc = tty_check_change(tty);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
if (rc)
return rc;
rc = dgap_wait_for_drain(tty);
if (rc)
return -EINTR;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
dgap_cmdw(ch, SBREAK, (u16)SBREAK_TIME, 0);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return 0;
case TIOCCBRK:
/*
* FEP5 doesn't support turning off a break unconditionally.
* The FEP5 device will stop sending a break automatically
* after the specified time value that was sent when turning on
* the break.
*/
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return 0;
case TIOCGSOFTCAR:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return put_user(C_CLOCAL(tty) ? 1 : 0,
(unsigned long __user *)arg);
case TIOCSSOFTCAR:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
rc = get_user(arg, (unsigned long __user *)arg);
if (rc)
return rc;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
tty->termios.c_cflag = ((tty->termios.c_cflag & ~CLOCAL) |
(arg ? CLOCAL : 0));
dgap_param(ch, bd, un->un_type);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return 0;
case TIOCMGET:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return dgap_get_modem_info(ch, uarg);
case TIOCMBIS:
case TIOCMBIC:
case TIOCMSET:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return dgap_set_modem_info(ch, bd, un, cmd, uarg);
/*
* Here are any additional ioctl's that we want to implement
*/
case TCFLSH:
/*
* The linux tty driver doesn't have a flush
* input routine for the driver, assuming all backed
* up data is in the line disc. buffers. However,
* we all know that's not the case. Here, we
* act on the ioctl, but then lie and say we didn't
* so the line discipline will process the flush
* also.
*/
rc = tty_check_change(tty);
if (rc) {
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return rc;
}
if ((arg == TCIFLUSH) || (arg == TCIOFLUSH)) {
if (!(un->un_type == DGAP_PRINT)) {
head = readw(&ch->ch_bs->rx_head);
writew(head, &ch->ch_bs->rx_tail);
writeb(0, &ch->ch_bs->orun);
}
}
if ((arg != TCOFLUSH) && (arg != TCIOFLUSH)) {
/* pretend we didn't recognize this IOCTL */
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return -ENOIOCTLCMD;
}
ch->ch_flags &= ~CH_STOP;
head = readw(&ch->ch_bs->tx_head);
dgap_cmdw(ch, FLUSHTX, (u16)head, 0);
dgap_cmdw(ch, RESUMETX, 0, 0);
if (ch->ch_tun.un_flags & (UN_LOW | UN_EMPTY)) {
ch->ch_tun.un_flags &= ~(UN_LOW | UN_EMPTY);
wake_up_interruptible(&ch->ch_tun.un_flags_wait);
}
if (ch->ch_pun.un_flags & (UN_LOW | UN_EMPTY)) {
ch->ch_pun.un_flags &= ~(UN_LOW | UN_EMPTY);
wake_up_interruptible(&ch->ch_pun.un_flags_wait);
}
if (waitqueue_active(&tty->write_wait))
wake_up_interruptible(&tty->write_wait);
/* Can't hold any locks when calling tty_wakeup! */
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
tty_wakeup(tty);
/* pretend we didn't recognize this IOCTL */
return -ENOIOCTLCMD;
case TCSETSF:
case TCSETSW:
/*
* The linux tty driver doesn't have a flush
* input routine for the driver, assuming all backed
* up data is in the line disc. buffers. However,
* we all know that's not the case. Here, we
* act on the ioctl, but then lie and say we didn't
* so the line discipline will process the flush
* also.
*/
if (cmd == TCSETSF) {
/* flush rx */
ch->ch_flags &= ~CH_STOP;
head = readw(&ch->ch_bs->rx_head);
writew(head, &ch->ch_bs->rx_tail);
}
/* now wait for all the output to drain */
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
rc = dgap_wait_for_drain(tty);
if (rc)
return -EINTR;
/* pretend we didn't recognize this */
return -ENOIOCTLCMD;
case TCSETAW:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
rc = dgap_wait_for_drain(tty);
if (rc)
return -EINTR;
/* pretend we didn't recognize this */
return -ENOIOCTLCMD;
case TCXONC:
/*
* The Linux Line Discipline (LD) would do this for us if we
* let it, but we have the special firmware options to do this
* the "right way" regardless of hardware or software flow
* control so we'll do it outselves instead of letting the LD
* do it.
*/
rc = tty_check_change(tty);
if (rc) {
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return rc;
}
switch (arg) {
case TCOON:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
dgap_tty_start(tty);
return 0;
case TCOOFF:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
dgap_tty_stop(tty);
return 0;
case TCION:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
/* Make the ld do it */
return -ENOIOCTLCMD;
case TCIOFF:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
/* Make the ld do it */
return -ENOIOCTLCMD;
default:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return -EINVAL;
}
case DIGI_GETA:
/* get information for ditty */
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return dgap_tty_digigeta(ch, uarg);
case DIGI_SETAW:
case DIGI_SETAF:
/* set information for ditty */
if (cmd == (DIGI_SETAW)) {
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
rc = dgap_wait_for_drain(tty);
if (rc)
return -EINTR;
spin_lock_irqsave(&bd->bd_lock, lock_flags);
spin_lock_irqsave(&ch->ch_lock, lock_flags2);
} else
tty_ldisc_flush(tty);
/* fall thru */
case DIGI_SETA:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return dgap_tty_digiseta(ch, bd, un, uarg);
case DIGI_GEDELAY:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return dgap_tty_digigetedelay(tty, uarg);
case DIGI_SEDELAY:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return dgap_tty_digisetedelay(ch, bd, un, uarg);
case DIGI_GETCUSTOMBAUD:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return dgap_tty_digigetcustombaud(ch, un, uarg);
case DIGI_SETCUSTOMBAUD:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return dgap_tty_digisetcustombaud(ch, bd, un, uarg);
case DIGI_RESET_PORT:
dgap_firmware_reset_port(ch);
dgap_param(ch, bd, un->un_type);
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return 0;
default:
spin_unlock_irqrestore(&ch->ch_lock, lock_flags2);
spin_unlock_irqrestore(&bd->bd_lock, lock_flags);
return -ENOIOCTLCMD;
}
}
static const struct tty_operations dgap_tty_ops = {
.open = dgap_tty_open,
.close = dgap_tty_close,
.write = dgap_tty_write,
.write_room = dgap_tty_write_room,
.flush_buffer = dgap_tty_flush_buffer,
.chars_in_buffer = dgap_tty_chars_in_buffer,
.flush_chars = dgap_tty_flush_chars,
.ioctl = dgap_tty_ioctl,
.set_termios = dgap_tty_set_termios,
.stop = dgap_tty_stop,
.start = dgap_tty_start,
.throttle = dgap_tty_throttle,
.unthrottle = dgap_tty_unthrottle,
.hangup = dgap_tty_hangup,
.put_char = dgap_tty_put_char,
.tiocmget = dgap_tty_tiocmget,
.tiocmset = dgap_tty_tiocmset,
.break_ctl = dgap_tty_send_break,
.wait_until_sent = dgap_tty_wait_until_sent,
.send_xchar = dgap_tty_send_xchar
};
/************************************************************************
*
* TTY Initialization/Cleanup Functions
*
************************************************************************/
/*
* dgap_tty_register()
*
* Init the tty subsystem for this board.
*/
static int dgap_tty_register(struct board_t *brd)
{
int rc;
brd->serial_driver = tty_alloc_driver(MAXPORTS,
TTY_DRIVER_REAL_RAW |
TTY_DRIVER_DYNAMIC_DEV |
TTY_DRIVER_HARDWARE_BREAK);
if (IS_ERR(brd->serial_driver))
return PTR_ERR(brd->serial_driver);
snprintf(brd->serial_name, MAXTTYNAMELEN, "tty_dgap_%d_",
brd->boardnum);
brd->serial_driver->name = brd->serial_name;
brd->serial_driver->name_base = 0;
brd->serial_driver->major = 0;
brd->serial_driver->minor_start = 0;
brd->serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
brd->serial_driver->subtype = SERIAL_TYPE_NORMAL;
brd->serial_driver->init_termios = dgap_default_termios;
brd->serial_driver->driver_name = DRVSTR;
/*
* Entry points for driver. Called by the kernel from
* tty_io.c and n_tty.c.
*/
tty_set_operations(brd->serial_driver, &dgap_tty_ops);
/*
* If we're doing transparent print, we have to do all of the above
* again, separately so we don't get the LD confused about what major
* we are when we get into the dgap_tty_open() routine.
*/
brd->print_driver = tty_alloc_driver(MAXPORTS,
TTY_DRIVER_REAL_RAW |
TTY_DRIVER_DYNAMIC_DEV |
TTY_DRIVER_HARDWARE_BREAK);
if (IS_ERR(brd->print_driver)) {
rc = PTR_ERR(brd->print_driver);
goto free_serial_drv;
}
snprintf(brd->print_name, MAXTTYNAMELEN, "pr_dgap_%d_",
brd->boardnum);
brd->print_driver->name = brd->print_name;
brd->print_driver->name_base = 0;
brd->print_driver->major = 0;
brd->print_driver->minor_start = 0;
brd->print_driver->type = TTY_DRIVER_TYPE_SERIAL;
brd->print_driver->subtype = SERIAL_TYPE_NORMAL;
brd->print_driver->init_termios = dgap_default_termios;
brd->print_driver->driver_name = DRVSTR;
/*
* Entry points for driver. Called by the kernel from
* tty_io.c and n_tty.c.
*/
tty_set_operations(brd->print_driver, &dgap_tty_ops);
/* Register tty devices */
rc = tty_register_driver(brd->serial_driver);
if (rc < 0)
goto free_print_drv;
/* Register Transparent Print devices */
rc = tty_register_driver(brd->print_driver);
if (rc < 0)
goto unregister_serial_drv;
return 0;
unregister_serial_drv:
tty_unregister_driver(brd->serial_driver);
free_print_drv:
put_tty_driver(brd->print_driver);
free_serial_drv:
put_tty_driver(brd->serial_driver);
return rc;
}
static void dgap_tty_unregister(struct board_t *brd)
{
tty_unregister_driver(brd->print_driver);
tty_unregister_driver(brd->serial_driver);
put_tty_driver(brd->print_driver);
put_tty_driver(brd->serial_driver);
}
static int dgap_alloc_flipbuf(struct board_t *brd)
{
/*
* allocate flip buffer for board.
*/
brd->flipbuf = kmalloc(MYFLIPLEN, GFP_KERNEL);
if (!brd->flipbuf)
return -ENOMEM;
brd->flipflagbuf = kmalloc(MYFLIPLEN, GFP_KERNEL);
if (!brd->flipflagbuf) {
kfree(brd->flipbuf);
return -ENOMEM;
}
return 0;
}
static void dgap_free_flipbuf(struct board_t *brd)
{
kfree(brd->flipbuf);
kfree(brd->flipflagbuf);
}
static struct board_t *dgap_verify_board(struct device *p)
{
struct board_t *bd;
if (!p)
return NULL;
bd = dev_get_drvdata(p);
if (!bd || bd->magic != DGAP_BOARD_MAGIC || bd->state != BOARD_READY)
return NULL;
return bd;
}
static ssize_t dgap_ports_state_show(struct device *p,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
int count = 0;
unsigned int i;
bd = dgap_verify_board(p);
if (!bd)
return 0;
for (i = 0; i < bd->nasync; i++) {
count += snprintf(buf + count, PAGE_SIZE - count,
"%d %s\n", bd->channels[i]->ch_portnum,
bd->channels[i]->ch_open_count ? "Open" : "Closed");
}
return count;
}
static DEVICE_ATTR(ports_state, S_IRUSR, dgap_ports_state_show, NULL);
static ssize_t dgap_ports_baud_show(struct device *p,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
int count = 0;
unsigned int i;
bd = dgap_verify_board(p);
if (!bd)
return 0;
for (i = 0; i < bd->nasync; i++) {
count += snprintf(buf + count, PAGE_SIZE - count, "%d %d\n",
bd->channels[i]->ch_portnum,
bd->channels[i]->ch_baud_info);
}
return count;
}
static DEVICE_ATTR(ports_baud, S_IRUSR, dgap_ports_baud_show, NULL);
static ssize_t dgap_ports_msignals_show(struct device *p,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
int count = 0;
unsigned int i;
bd = dgap_verify_board(p);
if (!bd)
return 0;
for (i = 0; i < bd->nasync; i++) {
if (bd->channels[i]->ch_open_count)
count += snprintf(buf + count, PAGE_SIZE - count,
"%d %s %s %s %s %s %s\n",
bd->channels[i]->ch_portnum,
(bd->channels[i]->ch_mostat &
UART_MCR_RTS) ? "RTS" : "",
(bd->channels[i]->ch_mistat &
UART_MSR_CTS) ? "CTS" : "",
(bd->channels[i]->ch_mostat &
UART_MCR_DTR) ? "DTR" : "",
(bd->channels[i]->ch_mistat &
UART_MSR_DSR) ? "DSR" : "",
(bd->channels[i]->ch_mistat &
UART_MSR_DCD) ? "DCD" : "",
(bd->channels[i]->ch_mistat &
UART_MSR_RI) ? "RI" : "");
else
count += snprintf(buf + count, PAGE_SIZE - count,
"%d\n", bd->channels[i]->ch_portnum);
}
return count;
}
static DEVICE_ATTR(ports_msignals, S_IRUSR, dgap_ports_msignals_show, NULL);
static ssize_t dgap_ports_iflag_show(struct device *p,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
int count = 0;
unsigned int i;
bd = dgap_verify_board(p);
if (!bd)
return 0;
for (i = 0; i < bd->nasync; i++)
count += snprintf(buf + count, PAGE_SIZE - count, "%d %x\n",
bd->channels[i]->ch_portnum,
bd->channels[i]->ch_c_iflag);
return count;
}
static DEVICE_ATTR(ports_iflag, S_IRUSR, dgap_ports_iflag_show, NULL);
static ssize_t dgap_ports_cflag_show(struct device *p,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
int count = 0;
unsigned int i;
bd = dgap_verify_board(p);
if (!bd)
return 0;
for (i = 0; i < bd->nasync; i++)
count += snprintf(buf + count, PAGE_SIZE - count, "%d %x\n",
bd->channels[i]->ch_portnum,
bd->channels[i]->ch_c_cflag);
return count;
}
static DEVICE_ATTR(ports_cflag, S_IRUSR, dgap_ports_cflag_show, NULL);
static ssize_t dgap_ports_oflag_show(struct device *p,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
int count = 0;
unsigned int i;
bd = dgap_verify_board(p);
if (!bd)
return 0;
for (i = 0; i < bd->nasync; i++)
count += snprintf(buf + count, PAGE_SIZE - count, "%d %x\n",
bd->channels[i]->ch_portnum,
bd->channels[i]->ch_c_oflag);
return count;
}
static DEVICE_ATTR(ports_oflag, S_IRUSR, dgap_ports_oflag_show, NULL);
static ssize_t dgap_ports_lflag_show(struct device *p,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
int count = 0;
unsigned int i;
bd = dgap_verify_board(p);
if (!bd)
return 0;
for (i = 0; i < bd->nasync; i++)
count += snprintf(buf + count, PAGE_SIZE - count, "%d %x\n",
bd->channels[i]->ch_portnum,
bd->channels[i]->ch_c_lflag);
return count;
}
static DEVICE_ATTR(ports_lflag, S_IRUSR, dgap_ports_lflag_show, NULL);
static ssize_t dgap_ports_digi_flag_show(struct device *p,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
int count = 0;
unsigned int i;
bd = dgap_verify_board(p);
if (!bd)
return 0;
for (i = 0; i < bd->nasync; i++)
count += snprintf(buf + count, PAGE_SIZE - count, "%d %x\n",
bd->channels[i]->ch_portnum,
bd->channels[i]->ch_digi.digi_flags);
return count;
}
static DEVICE_ATTR(ports_digi_flag, S_IRUSR, dgap_ports_digi_flag_show, NULL);
static ssize_t dgap_ports_rxcount_show(struct device *p,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
int count = 0;
unsigned int i;
bd = dgap_verify_board(p);
if (!bd)
return 0;
for (i = 0; i < bd->nasync; i++)
count += snprintf(buf + count, PAGE_SIZE - count, "%d %ld\n",
bd->channels[i]->ch_portnum,
bd->channels[i]->ch_rxcount);
return count;
}
static DEVICE_ATTR(ports_rxcount, S_IRUSR, dgap_ports_rxcount_show, NULL);
static ssize_t dgap_ports_txcount_show(struct device *p,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
int count = 0;
unsigned int i;
bd = dgap_verify_board(p);
if (!bd)
return 0;
for (i = 0; i < bd->nasync; i++)
count += snprintf(buf + count, PAGE_SIZE - count, "%d %ld\n",
bd->channels[i]->ch_portnum,
bd->channels[i]->ch_txcount);
return count;
}
static DEVICE_ATTR(ports_txcount, S_IRUSR, dgap_ports_txcount_show, NULL);
static ssize_t dgap_tty_state_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
if (!d)
return 0;
un = dev_get_drvdata(d);
if (!un || un->magic != DGAP_UNIT_MAGIC)
return 0;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return 0;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return 0;
if (bd->state != BOARD_READY)
return 0;
return snprintf(buf, PAGE_SIZE, "%s", un->un_open_count ?
"Open" : "Closed");
}
static DEVICE_ATTR(state, S_IRUSR, dgap_tty_state_show, NULL);
static ssize_t dgap_tty_baud_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
if (!d)
return 0;
un = dev_get_drvdata(d);
if (!un || un->magic != DGAP_UNIT_MAGIC)
return 0;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return 0;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return 0;
if (bd->state != BOARD_READY)
return 0;
return snprintf(buf, PAGE_SIZE, "%d\n", ch->ch_baud_info);
}
static DEVICE_ATTR(baud, S_IRUSR, dgap_tty_baud_show, NULL);
static ssize_t dgap_tty_msignals_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
if (!d)
return 0;
un = dev_get_drvdata(d);
if (!un || un->magic != DGAP_UNIT_MAGIC)
return 0;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return 0;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return 0;
if (bd->state != BOARD_READY)
return 0;
if (ch->ch_open_count) {
return snprintf(buf, PAGE_SIZE, "%s %s %s %s %s %s\n",
(ch->ch_mostat & UART_MCR_RTS) ? "RTS" : "",
(ch->ch_mistat & UART_MSR_CTS) ? "CTS" : "",
(ch->ch_mostat & UART_MCR_DTR) ? "DTR" : "",
(ch->ch_mistat & UART_MSR_DSR) ? "DSR" : "",
(ch->ch_mistat & UART_MSR_DCD) ? "DCD" : "",
(ch->ch_mistat & UART_MSR_RI) ? "RI" : "");
}
return 0;
}
static DEVICE_ATTR(msignals, S_IRUSR, dgap_tty_msignals_show, NULL);
static ssize_t dgap_tty_iflag_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
if (!d)
return 0;
un = dev_get_drvdata(d);
if (!un || un->magic != DGAP_UNIT_MAGIC)
return 0;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return 0;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return 0;
if (bd->state != BOARD_READY)
return 0;
return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_c_iflag);
}
static DEVICE_ATTR(iflag, S_IRUSR, dgap_tty_iflag_show, NULL);
static ssize_t dgap_tty_cflag_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
if (!d)
return 0;
un = dev_get_drvdata(d);
if (!un || un->magic != DGAP_UNIT_MAGIC)
return 0;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return 0;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return 0;
if (bd->state != BOARD_READY)
return 0;
return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_c_cflag);
}
static DEVICE_ATTR(cflag, S_IRUSR, dgap_tty_cflag_show, NULL);
static ssize_t dgap_tty_oflag_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
if (!d)
return 0;
un = dev_get_drvdata(d);
if (!un || un->magic != DGAP_UNIT_MAGIC)
return 0;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return 0;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return 0;
if (bd->state != BOARD_READY)
return 0;
return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_c_oflag);
}
static DEVICE_ATTR(oflag, S_IRUSR, dgap_tty_oflag_show, NULL);
static ssize_t dgap_tty_lflag_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
if (!d)
return 0;
un = dev_get_drvdata(d);
if (!un || un->magic != DGAP_UNIT_MAGIC)
return 0;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return 0;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return 0;
if (bd->state != BOARD_READY)
return 0;
return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_c_lflag);
}
static DEVICE_ATTR(lflag, S_IRUSR, dgap_tty_lflag_show, NULL);
static ssize_t dgap_tty_digi_flag_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
if (!d)
return 0;
un = dev_get_drvdata(d);
if (!un || un->magic != DGAP_UNIT_MAGIC)
return 0;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return 0;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return 0;
if (bd->state != BOARD_READY)
return 0;
return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_digi.digi_flags);
}
static DEVICE_ATTR(digi_flag, S_IRUSR, dgap_tty_digi_flag_show, NULL);
static ssize_t dgap_tty_rxcount_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
if (!d)
return 0;
un = dev_get_drvdata(d);
if (!un || un->magic != DGAP_UNIT_MAGIC)
return 0;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return 0;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return 0;
if (bd->state != BOARD_READY)
return 0;
return snprintf(buf, PAGE_SIZE, "%ld\n", ch->ch_rxcount);
}
static DEVICE_ATTR(rxcount, S_IRUSR, dgap_tty_rxcount_show, NULL);
static ssize_t dgap_tty_txcount_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
if (!d)
return 0;
un = dev_get_drvdata(d);
if (!un || un->magic != DGAP_UNIT_MAGIC)
return 0;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return 0;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return 0;
if (bd->state != BOARD_READY)
return 0;
return snprintf(buf, PAGE_SIZE, "%ld\n", ch->ch_txcount);
}
static DEVICE_ATTR(txcount, S_IRUSR, dgap_tty_txcount_show, NULL);
static ssize_t dgap_tty_name_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct board_t *bd;
struct channel_t *ch;
struct un_t *un;
int cn;
int bn;
struct cnode *cptr;
int found = FALSE;
int ncount = 0;
int starto = 0;
int i;
if (!d)
return 0;
un = dev_get_drvdata(d);
if (!un || un->magic != DGAP_UNIT_MAGIC)
return 0;
ch = un->un_ch;
if (!ch || ch->magic != DGAP_CHANNEL_MAGIC)
return 0;
bd = ch->ch_bd;
if (!bd || bd->magic != DGAP_BOARD_MAGIC)
return 0;
if (bd->state != BOARD_READY)
return 0;
bn = bd->boardnum;
cn = ch->ch_portnum;
for (cptr = bd->bd_config; cptr; cptr = cptr->next) {
if ((cptr->type == BNODE) &&
((cptr->u.board.type == APORT2_920P) ||
(cptr->u.board.type == APORT4_920P) ||
(cptr->u.board.type == APORT8_920P) ||
(cptr->u.board.type == PAPORT4) ||
(cptr->u.board.type == PAPORT8))) {
found = TRUE;
if (cptr->u.board.v_start)
starto = cptr->u.board.start;
else
starto = 1;
}
if (cptr->type == TNODE && found == TRUE) {
char *ptr1;
if (strstr(cptr->u.ttyname, "tty")) {
ptr1 = cptr->u.ttyname;
ptr1 += 3;
} else
ptr1 = cptr->u.ttyname;
for (i = 0; i < dgap_config_get_num_prts(bd); i++) {
if (cn != i)
continue;
return snprintf(buf, PAGE_SIZE, "%s%s%02d\n",
(un->un_type == DGAP_PRINT) ?
"pr" : "tty",
ptr1, i + starto);
}
}
if (cptr->type == CNODE) {
for (i = 0; i < cptr->u.conc.nport; i++) {
if (cn != (i + ncount))
continue;
return snprintf(buf, PAGE_SIZE, "%s%s%02ld\n",
(un->un_type == DGAP_PRINT) ?
"pr" : "tty",
cptr->u.conc.id,
i + (cptr->u.conc.v_start ?
cptr->u.conc.start : 1));
}
ncount += cptr->u.conc.nport;
}
if (cptr->type == MNODE) {
for (i = 0; i < cptr->u.module.nport; i++) {
if (cn != (i + ncount))
continue;
return snprintf(buf, PAGE_SIZE, "%s%s%02ld\n",
(un->un_type == DGAP_PRINT) ?
"pr" : "tty",
cptr->u.module.id,
i + (cptr->u.module.v_start ?
cptr->u.module.start : 1));
}
ncount += cptr->u.module.nport;
}
}
return snprintf(buf, PAGE_SIZE, "%s_dgap_%d_%d\n",
(un->un_type == DGAP_PRINT) ? "pr" : "tty", bn, cn);
}
static DEVICE_ATTR(custom_name, S_IRUSR, dgap_tty_name_show, NULL);
static struct attribute *dgap_sysfs_tty_entries[] = {
&dev_attr_state.attr,
&dev_attr_baud.attr,
&dev_attr_msignals.attr,
&dev_attr_iflag.attr,
&dev_attr_cflag.attr,
&dev_attr_oflag.attr,
&dev_attr_lflag.attr,
&dev_attr_digi_flag.attr,
&dev_attr_rxcount.attr,
&dev_attr_txcount.attr,
&dev_attr_custom_name.attr,
NULL
};
/* this function creates the sys files that will export each signal status
* to sysfs each value will be put in a separate filename
*/
static void dgap_create_ports_sysfiles(struct board_t *bd)
{
dev_set_drvdata(&bd->pdev->dev, bd);
device_create_file(&bd->pdev->dev, &dev_attr_ports_state);
device_create_file(&bd->pdev->dev, &dev_attr_ports_baud);
device_create_file(&bd->pdev->dev, &dev_attr_ports_msignals);
device_create_file(&bd->pdev->dev, &dev_attr_ports_iflag);
device_create_file(&bd->pdev->dev, &dev_attr_ports_cflag);
device_create_file(&bd->pdev->dev, &dev_attr_ports_oflag);
device_create_file(&bd->pdev->dev, &dev_attr_ports_lflag);
device_create_file(&bd->pdev->dev, &dev_attr_ports_digi_flag);
device_create_file(&bd->pdev->dev, &dev_attr_ports_rxcount);
device_create_file(&bd->pdev->dev, &dev_attr_ports_txcount);
}
/* removes all the sys files created for that port */
static void dgap_remove_ports_sysfiles(struct board_t *bd)
{
device_remove_file(&bd->pdev->dev, &dev_attr_ports_state);
device_remove_file(&bd->pdev->dev, &dev_attr_ports_baud);
device_remove_file(&bd->pdev->dev, &dev_attr_ports_msignals);
device_remove_file(&bd->pdev->dev, &dev_attr_ports_iflag);
device_remove_file(&bd->pdev->dev, &dev_attr_ports_cflag);
device_remove_file(&bd->pdev->dev, &dev_attr_ports_oflag);
device_remove_file(&bd->pdev->dev, &dev_attr_ports_lflag);
device_remove_file(&bd->pdev->dev, &dev_attr_ports_digi_flag);
device_remove_file(&bd->pdev->dev, &dev_attr_ports_rxcount);
device_remove_file(&bd->pdev->dev, &dev_attr_ports_txcount);
}
/*
* Copies the BIOS code from the user to the board,
* and starts the BIOS running.
*/
static void dgap_do_bios_load(struct board_t *brd, const u8 *ubios, int len)
{
u8 __iomem *addr;
uint offset;
unsigned int i;
if (!brd || (brd->magic != DGAP_BOARD_MAGIC) || !brd->re_map_membase)
return;
addr = brd->re_map_membase;
/*
* clear POST area
*/
for (i = 0; i < 16; i++)
writeb(0, addr + POSTAREA + i);
/*
* Download bios
*/
offset = 0x1000;
memcpy_toio(addr + offset, ubios, len);
writel(0x0bf00401, addr);
writel(0, (addr + 4));
/* Clear the reset, and change states. */
writeb(FEPCLR, brd->re_map_port);
}
/*
* Checks to see if the BIOS completed running on the card.
*/
static int dgap_test_bios(struct board_t *brd)
{
u8 __iomem *addr;
u16 word;
u16 err1;
u16 err2;
if (!brd || (brd->magic != DGAP_BOARD_MAGIC) || !brd->re_map_membase)
return -EINVAL;
addr = brd->re_map_membase;
word = readw(addr + POSTAREA);
/*
* It can take 5-6 seconds for a board to
* pass the bios self test and post results.
* Give it 10 seconds.
*/
brd->wait_for_bios = 0;
while (brd->wait_for_bios < 1000) {
/* Check to see if BIOS thinks board is good. (GD). */
if (word == *(u16 *)"GD")
return 0;
msleep_interruptible(10);
brd->wait_for_bios++;
word = readw(addr + POSTAREA);
}
/* Gave up on board after too long of time taken */
err1 = readw(addr + SEQUENCE);
err2 = readw(addr + ERROR);
dev_warn(&brd->pdev->dev, "%s failed diagnostics. Error #(%x,%x).\n",
brd->name, err1, err2);
brd->state = BOARD_FAILED;
brd->dpastatus = BD_NOBIOS;
return -EIO;
}
/*
* Copies the FEP code from the user to the board,
* and starts the FEP running.
*/
static void dgap_do_fep_load(struct board_t *brd, const u8 *ufep, int len)
{
u8 __iomem *addr;
uint offset;
if (!brd || (brd->magic != DGAP_BOARD_MAGIC) || !brd->re_map_membase)
return;
addr = brd->re_map_membase;
/*
* Download FEP
*/
offset = 0x1000;
memcpy_toio(addr + offset, ufep, len);
/*
* If board is a concentrator product, we need to give
* it its config string describing how the concentrators look.
*/
if ((brd->type == PCX) || (brd->type == PEPC)) {
u8 string[100];
u8 __iomem *config;
u8 *xconfig;
unsigned int i = 0;
xconfig = dgap_create_config_string(brd, string);
/* Write string to board memory */
config = addr + CONFIG;
for (; i < CONFIGSIZE; i++, config++, xconfig++) {
writeb(*xconfig, config);
if ((*xconfig & 0xff) == 0xff)
break;
}
}
writel(0xbfc01004, (addr + 0xc34));
writel(0x3, (addr + 0xc30));
}
/*
* Waits for the FEP to report thats its ready for us to use.
*/
static int dgap_test_fep(struct board_t *brd)
{
u8 __iomem *addr;
u16 word;
u16 err1;
u16 err2;
if (!brd || (brd->magic != DGAP_BOARD_MAGIC) || !brd->re_map_membase)
return -EINVAL;
addr = brd->re_map_membase;
word = readw(addr + FEPSTAT);
/*
* It can take 2-3 seconds for the FEP to
* be up and running. Give it 5 secs.
*/
brd->wait_for_fep = 0;
while (brd->wait_for_fep < 500) {
/* Check to see if FEP is up and running now. */
if (word == *(u16 *)"OS") {
/*
* Check to see if the board can support FEP5+ commands.
*/
word = readw(addr + FEP5_PLUS);
if (word == *(u16 *)"5A")
brd->bd_flags |= BD_FEP5PLUS;
return 0;
}
msleep_interruptible(10);
brd->wait_for_fep++;
word = readw(addr + FEPSTAT);
}
/* Gave up on board after too long of time taken */
err1 = readw(addr + SEQUENCE);
err2 = readw(addr + ERROR);
dev_warn(&brd->pdev->dev,
"FEPOS for %s not functioning. Error #(%x,%x).\n",
brd->name, err1, err2);
brd->state = BOARD_FAILED;
brd->dpastatus = BD_NOFEP;
return -EIO;
}
/*
* Physically forces the FEP5 card to reset itself.
*/
static void dgap_do_reset_board(struct board_t *brd)
{
u8 check;
u32 check1;
u32 check2;
unsigned int i;
if (!brd || (brd->magic != DGAP_BOARD_MAGIC) ||
!brd->re_map_membase || !brd->re_map_port)
return;
/* FEPRST does not vary among supported boards */
writeb(FEPRST, brd->re_map_port);
for (i = 0; i <= 1000; i++) {
check = readb(brd->re_map_port) & 0xe;
if (check == FEPRST)
break;
udelay(10);
}
if (i > 1000) {
dev_warn(&brd->pdev->dev,
"dgap: Board not resetting... Failing board.\n");
brd->state = BOARD_FAILED;
brd->dpastatus = BD_NOFEP;
return;
}
/*
* Make sure there really is memory out there.
*/
writel(0xa55a3cc3, (brd->re_map_membase + LOWMEM));
writel(0x5aa5c33c, (brd->re_map_membase + HIGHMEM));
check1 = readl(brd->re_map_membase + LOWMEM);
check2 = readl(brd->re_map_membase + HIGHMEM);
if ((check1 != 0xa55a3cc3) || (check2 != 0x5aa5c33c)) {
dev_warn(&brd->pdev->dev,
"No memory at %p for board.\n",
brd->re_map_membase);
brd->state = BOARD_FAILED;
brd->dpastatus = BD_NOFEP;
return;
}
}
#ifdef DIGI_CONCENTRATORS_SUPPORTED
/*
* Sends a concentrator image into the FEP5 board.
*/
static void dgap_do_conc_load(struct board_t *brd, u8 *uaddr, int len)
{
char __iomem *vaddr;
u16 offset;
struct downld_t *to_dp;
if (!brd || (brd->magic != DGAP_BOARD_MAGIC) || !brd->re_map_membase)
return;
vaddr = brd->re_map_membase;
offset = readw((u16 *)(vaddr + DOWNREQ));
to_dp = (struct downld_t *)(vaddr + (int)offset);
memcpy_toio(to_dp, uaddr, len);
/* Tell card we have data for it */
writew(0, vaddr + (DOWNREQ));
brd->conc_dl_status = NO_PENDING_CONCENTRATOR_REQUESTS;
}
#endif
#define EXPANSION_ROM_SIZE (64 * 1024)
#define FEP5_ROM_MAGIC (0xFEFFFFFF)
static void dgap_get_vpd(struct board_t *brd)
{
u32 magic;
u32 base_offset;
u16 rom_offset;
u16 vpd_offset;
u16 image_length;
u16 i;
u8 byte1;
u8 byte2;
/*
* Poke the magic number at the PCI Rom Address location.
* If VPD is supported, the value read from that address
* will be non-zero.
*/
magic = FEP5_ROM_MAGIC;
pci_write_config_dword(brd->pdev, PCI_ROM_ADDRESS, magic);
pci_read_config_dword(brd->pdev, PCI_ROM_ADDRESS, &magic);
/* VPD not supported, bail */
if (!magic)
return;
/*
* To get to the OTPROM memory, we have to send the boards base
* address or'ed with 1 into the PCI Rom Address location.
*/
magic = brd->membase | 0x01;
pci_write_config_dword(brd->pdev, PCI_ROM_ADDRESS, magic);
pci_read_config_dword(brd->pdev, PCI_ROM_ADDRESS, &magic);
byte1 = readb(brd->re_map_membase);
byte2 = readb(brd->re_map_membase + 1);
/*
* If the board correctly swapped to the OTPROM memory,
* the first 2 bytes (header) should be 0x55, 0xAA
*/
if (byte1 == 0x55 && byte2 == 0xAA) {
base_offset = 0;
/*
* We have to run through all the OTPROM memory looking
* for the VPD offset.
*/
while (base_offset <= EXPANSION_ROM_SIZE) {
/*
* Lots of magic numbers here.
*
* The VPD offset is located inside the ROM Data
* Structure.
*
* We also have to remember the length of each
* ROM Data Structure, so we can "hop" to the next
* entry if the VPD isn't in the current
* ROM Data Structure.
*/
rom_offset = readw(brd->re_map_membase +
base_offset + 0x18);
image_length = readw(brd->re_map_membase +
rom_offset + 0x10) * 512;
vpd_offset = readw(brd->re_map_membase +
rom_offset + 0x08);
/* Found the VPD entry */
if (vpd_offset)
break;
/* We didn't find a VPD entry, go to next ROM entry. */
base_offset += image_length;
byte1 = readb(brd->re_map_membase + base_offset);
byte2 = readb(brd->re_map_membase + base_offset + 1);
/*
* If the new ROM offset doesn't have 0x55, 0xAA
* as its header, we have run out of ROM.
*/
if (byte1 != 0x55 || byte2 != 0xAA)
break;
}
/*
* If we have a VPD offset, then mark the board
* as having a valid VPD, and copy VPDSIZE (512) bytes of
* that VPD to the buffer we have in our board structure.
*/
if (vpd_offset) {
brd->bd_flags |= BD_HAS_VPD;
for (i = 0; i < VPDSIZE; i++) {
brd->vpd[i] = readb(brd->re_map_membase +
vpd_offset + i);
}
}
}
/*
* We MUST poke the magic number at the PCI Rom Address location again.
* This makes the card report the regular board memory back to us,
* rather than the OTPROM memory.
*/
magic = FEP5_ROM_MAGIC;
pci_write_config_dword(brd->pdev, PCI_ROM_ADDRESS, magic);
}
static ssize_t dgap_driver_version_show(struct device_driver *ddp, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%s\n", DG_PART);
}
static DRIVER_ATTR(version, S_IRUSR, dgap_driver_version_show, NULL);
static ssize_t dgap_driver_boards_show(struct device_driver *ddp, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", dgap_numboards);
}
static DRIVER_ATTR(boards, S_IRUSR, dgap_driver_boards_show, NULL);
static ssize_t dgap_driver_maxboards_show(struct device_driver *ddp, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", MAXBOARDS);
}
static DRIVER_ATTR(maxboards, S_IRUSR, dgap_driver_maxboards_show, NULL);
static ssize_t dgap_driver_pollcounter_show(struct device_driver *ddp,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%ld\n", dgap_poll_counter);
}
static DRIVER_ATTR(pollcounter, S_IRUSR, dgap_driver_pollcounter_show, NULL);
static ssize_t dgap_driver_pollrate_show(struct device_driver *ddp, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%dms\n", dgap_poll_tick);
}
static ssize_t dgap_driver_pollrate_store(struct device_driver *ddp,
const char *buf, size_t count)
{
if (sscanf(buf, "%d\n", &dgap_poll_tick) != 1)
return -EINVAL;
return count;
}
static DRIVER_ATTR(pollrate, (S_IRUSR | S_IWUSR), dgap_driver_pollrate_show,
dgap_driver_pollrate_store);
static int dgap_create_driver_sysfiles(struct pci_driver *dgap_driver)
{
int rc = 0;
struct device_driver *driverfs = &dgap_driver->driver;
rc |= driver_create_file(driverfs, &driver_attr_version);
rc |= driver_create_file(driverfs, &driver_attr_boards);
rc |= driver_create_file(driverfs, &driver_attr_maxboards);
rc |= driver_create_file(driverfs, &driver_attr_pollrate);
rc |= driver_create_file(driverfs, &driver_attr_pollcounter);
return rc;
}
static void dgap_remove_driver_sysfiles(struct pci_driver *dgap_driver)
{
struct device_driver *driverfs = &dgap_driver->driver;
driver_remove_file(driverfs, &driver_attr_version);
driver_remove_file(driverfs, &driver_attr_boards);
driver_remove_file(driverfs, &driver_attr_maxboards);
driver_remove_file(driverfs, &driver_attr_pollrate);
driver_remove_file(driverfs, &driver_attr_pollcounter);
}
static struct attribute_group dgap_tty_attribute_group = {
.name = NULL,
.attrs = dgap_sysfs_tty_entries,
};
static void dgap_create_tty_sysfs(struct un_t *un, struct device *c)
{
int ret;
ret = sysfs_create_group(&c->kobj, &dgap_tty_attribute_group);
if (ret)
return;
dev_set_drvdata(c, un);
}
static void dgap_remove_tty_sysfs(struct device *c)
{
sysfs_remove_group(&c->kobj, &dgap_tty_attribute_group);
}
/*
* Create pr and tty device entries
*/
static int dgap_tty_register_ports(struct board_t *brd)
{
struct channel_t *ch;
int i;
int ret;
brd->serial_ports = kcalloc(brd->nasync, sizeof(*brd->serial_ports),
GFP_KERNEL);
if (!brd->serial_ports)
return -ENOMEM;
brd->printer_ports = kcalloc(brd->nasync, sizeof(*brd->printer_ports),
GFP_KERNEL);
if (!brd->printer_ports) {
ret = -ENOMEM;
goto free_serial_ports;
}
for (i = 0; i < brd->nasync; i++) {
tty_port_init(&brd->serial_ports[i]);
tty_port_init(&brd->printer_ports[i]);
}
ch = brd->channels[0];
for (i = 0; i < brd->nasync; i++, ch = brd->channels[i]) {
struct device *classp;
classp = tty_port_register_device(&brd->serial_ports[i],
brd->serial_driver,
i, NULL);
if (IS_ERR(classp)) {
ret = PTR_ERR(classp);
goto unregister_ttys;
}
dgap_create_tty_sysfs(&ch->ch_tun, classp);
ch->ch_tun.un_sysfs = classp;
classp = tty_port_register_device(&brd->printer_ports[i],
brd->print_driver,
i, NULL);
if (IS_ERR(classp)) {
ret = PTR_ERR(classp);
goto unregister_ttys;
}
dgap_create_tty_sysfs(&ch->ch_pun, classp);
ch->ch_pun.un_sysfs = classp;
}
dgap_create_ports_sysfiles(brd);
return 0;
unregister_ttys:
while (i >= 0) {
ch = brd->channels[i];
if (ch->ch_tun.un_sysfs) {
dgap_remove_tty_sysfs(ch->ch_tun.un_sysfs);
tty_unregister_device(brd->serial_driver, i);
}
if (ch->ch_pun.un_sysfs) {
dgap_remove_tty_sysfs(ch->ch_pun.un_sysfs);
tty_unregister_device(brd->print_driver, i);
}
i--;
}
for (i = 0; i < brd->nasync; i++) {
tty_port_destroy(&brd->serial_ports[i]);
tty_port_destroy(&brd->printer_ports[i]);
}
kfree(brd->printer_ports);
brd->printer_ports = NULL;
free_serial_ports:
kfree(brd->serial_ports);
brd->serial_ports = NULL;
return ret;
}
/*
* dgap_cleanup_tty()
*
* Uninitialize the TTY portion of this driver. Free all memory and
* resources.
*/
static void dgap_cleanup_tty(struct board_t *brd)
{
struct device *dev;
unsigned int i;
for (i = 0; i < brd->nasync; i++) {
tty_port_destroy(&brd->serial_ports[i]);
dev = brd->channels[i]->ch_tun.un_sysfs;
dgap_remove_tty_sysfs(dev);
tty_unregister_device(brd->serial_driver, i);
}
tty_unregister_driver(brd->serial_driver);
put_tty_driver(brd->serial_driver);
kfree(brd->serial_ports);
for (i = 0; i < brd->nasync; i++) {
tty_port_destroy(&brd->printer_ports[i]);
dev = brd->channels[i]->ch_pun.un_sysfs;
dgap_remove_tty_sysfs(dev);
tty_unregister_device(brd->print_driver, i);
}
tty_unregister_driver(brd->print_driver);
put_tty_driver(brd->print_driver);
kfree(brd->printer_ports);
}
static int dgap_request_irq(struct board_t *brd)
{
int rc;
if (!brd || brd->magic != DGAP_BOARD_MAGIC)
return -ENODEV;
/*
* Set up our interrupt handler if we are set to do interrupts.
*/
if (dgap_config_get_useintr(brd) && brd->irq) {
rc = request_irq(brd->irq, dgap_intr, IRQF_SHARED, "DGAP", brd);
if (!rc)
brd->intr_used = 1;
}
return 0;
}
static void dgap_free_irq(struct board_t *brd)
{
if (brd->intr_used && brd->irq)
free_irq(brd->irq, brd);
}
static int dgap_firmware_load(struct pci_dev *pdev, int card_type,
struct board_t *brd)
{
const struct firmware *fw;
char *tmp_ptr;
int ret;
char *dgap_config_buf;
dgap_get_vpd(brd);
dgap_do_reset_board(brd);
if (fw_info[card_type].conf_name) {
ret = request_firmware(&fw, fw_info[card_type].conf_name,
&pdev->dev);
if (ret) {
dev_err(&pdev->dev, "config file %s not found\n",
fw_info[card_type].conf_name);
return ret;
}
dgap_config_buf = kzalloc(fw->size + 1, GFP_KERNEL);
if (!dgap_config_buf) {
release_firmware(fw);
return -ENOMEM;
}
memcpy(dgap_config_buf, fw->data, fw->size);
release_firmware(fw);
/*
* preserve dgap_config_buf
* as dgap_parsefile would
* otherwise alter it.
*/
tmp_ptr = dgap_config_buf;
if (dgap_parsefile(&tmp_ptr) != 0) {
kfree(dgap_config_buf);
return -EINVAL;
}
kfree(dgap_config_buf);
}
/*
* Match this board to a config the user created for us.
*/
brd->bd_config =
dgap_find_config(brd->type, brd->pci_bus, brd->pci_slot);
/*
* Because the 4 port Xr products share the same PCI ID
* as the 8 port Xr products, if we receive a NULL config
* back, and this is a PAPORT8 board, retry with a
* PAPORT4 attempt as well.
*/
if (brd->type == PAPORT8 && !brd->bd_config)
brd->bd_config =
dgap_find_config(PAPORT4, brd->pci_bus, brd->pci_slot);
if (!brd->bd_config) {
dev_err(&pdev->dev, "No valid configuration found\n");
return -EINVAL;
}
if (fw_info[card_type].bios_name) {
ret = request_firmware(&fw, fw_info[card_type].bios_name,
&pdev->dev);
if (ret) {
dev_err(&pdev->dev, "bios file %s not found\n",
fw_info[card_type].bios_name);
return ret;
}
dgap_do_bios_load(brd, fw->data, fw->size);
release_firmware(fw);
/* Wait for BIOS to test board... */
ret = dgap_test_bios(brd);
if (ret)
return ret;
}
if (fw_info[card_type].fep_name) {
ret = request_firmware(&fw, fw_info[card_type].fep_name,
&pdev->dev);
if (ret) {
dev_err(&pdev->dev, "dgap: fep file %s not found\n",
fw_info[card_type].fep_name);
return ret;
}
dgap_do_fep_load(brd, fw->data, fw->size);
release_firmware(fw);
/* Wait for FEP to load on board... */
ret = dgap_test_fep(brd);
if (ret)
return ret;
}
#ifdef DIGI_CONCENTRATORS_SUPPORTED
/*
* If this is a CX or EPCX, we need to see if the firmware
* is requesting a concentrator image from us.
*/
if ((bd->type == PCX) || (bd->type == PEPC)) {
chk_addr = (u16 *)(vaddr + DOWNREQ);
/* Nonzero if FEP is requesting concentrator image. */
check = readw(chk_addr);
vaddr = brd->re_map_membase;
}
if (fw_info[card_type].con_name && check && vaddr) {
ret = request_firmware(&fw, fw_info[card_type].con_name,
&pdev->dev);
if (ret) {
dev_err(&pdev->dev, "conc file %s not found\n",
fw_info[card_type].con_name);
return ret;
}
/* Put concentrator firmware loading code here */
offset = readw((u16 *)(vaddr + DOWNREQ));
memcpy_toio(offset, fw->data, fw->size);
dgap_do_conc_load(brd, (char *)fw->data, fw->size)
release_firmware(fw);
}
#endif
return 0;
}
/*
* dgap_tty_init()
*
* Init the tty subsystem. Called once per board after board has been
* downloaded and init'ed.
*/
static int dgap_tty_init(struct board_t *brd)
{
int i;
int tlw;
uint true_count;
u8 __iomem *vaddr;
u8 modem;
struct channel_t *ch;
struct bs_t __iomem *bs;
struct cm_t __iomem *cm;
int ret;
/*
* Initialize board structure elements.
*/
vaddr = brd->re_map_membase;
true_count = readw((vaddr + NCHAN));
brd->nasync = dgap_config_get_num_prts(brd);
if (!brd->nasync)
brd->nasync = brd->maxports;
if (brd->nasync > brd->maxports)
brd->nasync = brd->maxports;
if (true_count != brd->nasync) {
dev_warn(&brd->pdev->dev,
"%s configured for %d ports, has %d ports.\n",
brd->name, brd->nasync, true_count);
if ((brd->type == PPCM) &&
(true_count == 64 || true_count == 0)) {
dev_warn(&brd->pdev->dev,
"Please make SURE the EBI cable running from the card\n");
dev_warn(&brd->pdev->dev,
"to each EM module is plugged into EBI IN!\n");
}
brd->nasync = true_count;
/* If no ports, don't bother going any further */
if (!brd->nasync) {
brd->state = BOARD_FAILED;
brd->dpastatus = BD_NOFEP;
return -EIO;
}
}
/*
* Allocate channel memory that might not have been allocated
* when the driver was first loaded.
*/
for (i = 0; i < brd->nasync; i++) {
brd->channels[i] =
kzalloc(sizeof(struct channel_t), GFP_KERNEL);
if (!brd->channels[i]) {
ret = -ENOMEM;
goto free_chan;
}
}
ch = brd->channels[0];
vaddr = brd->re_map_membase;
bs = (struct bs_t __iomem *)((ulong)vaddr + CHANBUF);
cm = (struct cm_t __iomem *)((ulong)vaddr + CMDBUF);
brd->bd_bs = bs;
/* Set up channel variables */
for (i = 0; i < brd->nasync; i++, ch = brd->channels[i], bs++) {
spin_lock_init(&ch->ch_lock);
/* Store all our magic numbers */
ch->magic = DGAP_CHANNEL_MAGIC;
ch->ch_tun.magic = DGAP_UNIT_MAGIC;
ch->ch_tun.un_type = DGAP_SERIAL;
ch->ch_tun.un_ch = ch;
ch->ch_tun.un_dev = i;
ch->ch_pun.magic = DGAP_UNIT_MAGIC;
ch->ch_pun.un_type = DGAP_PRINT;
ch->ch_pun.un_ch = ch;
ch->ch_pun.un_dev = i;
ch->ch_vaddr = vaddr;
ch->ch_bs = bs;
ch->ch_cm = cm;
ch->ch_bd = brd;
ch->ch_portnum = i;
ch->ch_digi = dgap_digi_init;
/*
* Set up digi dsr and dcd bits based on altpin flag.
*/
if (dgap_config_get_altpin(brd)) {
ch->ch_dsr = DM_CD;
ch->ch_cd = DM_DSR;
ch->ch_digi.digi_flags |= DIGI_ALTPIN;
} else {
ch->ch_cd = DM_CD;
ch->ch_dsr = DM_DSR;
}
ch->ch_taddr = vaddr + (ioread16(&ch->ch_bs->tx_seg) << 4);
ch->ch_raddr = vaddr + (ioread16(&ch->ch_bs->rx_seg) << 4);
ch->ch_tx_win = 0;
ch->ch_rx_win = 0;
ch->ch_tsize = readw(&ch->ch_bs->tx_max) + 1;
ch->ch_rsize = readw(&ch->ch_bs->rx_max) + 1;
ch->ch_tstart = 0;
ch->ch_rstart = 0;
/*
* Set queue water marks, interrupt mask,
* and general tty parameters.
*/
tlw = ch->ch_tsize >= 2000 ? ((ch->ch_tsize * 5) / 8) :
ch->ch_tsize / 2;
ch->ch_tlw = tlw;
dgap_cmdw(ch, STLOW, tlw, 0);
dgap_cmdw(ch, SRLOW, ch->ch_rsize / 2, 0);
dgap_cmdw(ch, SRHIGH, 7 * ch->ch_rsize / 8, 0);
ch->ch_mistat = readb(&ch->ch_bs->m_stat);
init_waitqueue_head(&ch->ch_flags_wait);
init_waitqueue_head(&ch->ch_tun.un_flags_wait);
init_waitqueue_head(&ch->ch_pun.un_flags_wait);
/* Turn on all modem interrupts for now */
modem = (DM_CD | DM_DSR | DM_CTS | DM_RI);
writeb(modem, &ch->ch_bs->m_int);
/*
* Set edelay to 0 if interrupts are turned on,
* otherwise set edelay to the usual 100.
*/
if (brd->intr_used)
writew(0, &ch->ch_bs->edelay);
else
writew(100, &ch->ch_bs->edelay);
writeb(1, &ch->ch_bs->idata);
}
return 0;
free_chan:
while (--i >= 0) {
kfree(brd->channels[i]);
brd->channels[i] = NULL;
}
return ret;
}
/*
* dgap_tty_free()
*
* Free the channles which are allocated in dgap_tty_init().
*/
static void dgap_tty_free(struct board_t *brd)
{
int i;
for (i = 0; i < brd->nasync; i++)
kfree(brd->channels[i]);
}
static int dgap_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
int rc;
struct board_t *brd;
if (dgap_numboards >= MAXBOARDS)
return -EPERM;
rc = pci_enable_device(pdev);
if (rc)
return -EIO;
brd = dgap_found_board(pdev, ent->driver_data, dgap_numboards);
if (IS_ERR(brd))
return PTR_ERR(brd);
rc = dgap_firmware_load(pdev, ent->driver_data, brd);
if (rc)
goto cleanup_brd;
rc = dgap_alloc_flipbuf(brd);
if (rc)
goto cleanup_brd;
rc = dgap_tty_register(brd);
if (rc)
goto free_flipbuf;
rc = dgap_request_irq(brd);
if (rc)
goto unregister_tty;
/*
* Do tty device initialization.
*/
rc = dgap_tty_init(brd);
if (rc < 0)
goto free_irq;
rc = dgap_tty_register_ports(brd);
if (rc)
goto tty_free;
brd->state = BOARD_READY;
brd->dpastatus = BD_RUNNING;
dgap_board[dgap_numboards++] = brd;
return 0;
tty_free:
dgap_tty_free(brd);
free_irq:
dgap_free_irq(brd);
unregister_tty:
dgap_tty_unregister(brd);
free_flipbuf:
dgap_free_flipbuf(brd);
cleanup_brd:
dgap_cleanup_nodes();
dgap_unmap(brd);
kfree(brd);
return rc;
}
/*
* dgap_cleanup_board()
*
* Free all the memory associated with a board
*/
static void dgap_cleanup_board(struct board_t *brd)
{
unsigned int i;
if (!brd || brd->magic != DGAP_BOARD_MAGIC)
return;
dgap_free_irq(brd);
tasklet_kill(&brd->helper_tasklet);
dgap_unmap(brd);
/* Free all allocated channels structs */
for (i = 0; i < MAXPORTS ; i++)
kfree(brd->channels[i]);
kfree(brd->flipbuf);
kfree(brd->flipflagbuf);
dgap_board[brd->boardnum] = NULL;
kfree(brd);
}
static void dgap_stop(bool removesys, struct pci_driver *drv)
{
unsigned long lock_flags;
spin_lock_irqsave(&dgap_poll_lock, lock_flags);
dgap_poll_stop = 1;
spin_unlock_irqrestore(&dgap_poll_lock, lock_flags);
del_timer_sync(&dgap_poll_timer);
if (removesys)
dgap_remove_driver_sysfiles(drv);
device_destroy(dgap_class, MKDEV(DIGI_DGAP_MAJOR, 0));
class_destroy(dgap_class);
unregister_chrdev(DIGI_DGAP_MAJOR, "dgap");
}
static void dgap_remove_one(struct pci_dev *dev)
{
unsigned int i;
struct pci_driver *drv = to_pci_driver(dev->dev.driver);
dgap_stop(true, drv);
for (i = 0; i < dgap_numboards; ++i) {
dgap_remove_ports_sysfiles(dgap_board[i]);
dgap_cleanup_tty(dgap_board[i]);
dgap_cleanup_board(dgap_board[i]);
}
dgap_cleanup_nodes();
}
static struct pci_driver dgap_driver = {
.name = "dgap",
.probe = dgap_init_one,
.id_table = dgap_pci_tbl,
.remove = dgap_remove_one,
};
/*
* Start of driver.
*/
static int dgap_start(void)
{
int rc;
unsigned long flags;
struct device *device;
dgap_numboards = 0;
pr_info("For the tools package please visit http://www.digi.com\n");
/*
* Register our base character device into the kernel.
*/
/*
* Register management/dpa devices
*/
rc = register_chrdev(DIGI_DGAP_MAJOR, "dgap", &dgap_board_fops);
if (rc < 0)
return rc;
dgap_class = class_create(THIS_MODULE, "dgap_mgmt");
if (IS_ERR(dgap_class)) {
rc = PTR_ERR(dgap_class);
goto failed_class;
}
device = device_create(dgap_class, NULL,
MKDEV(DIGI_DGAP_MAJOR, 0),
NULL, "dgap_mgmt");
if (IS_ERR(device)) {
rc = PTR_ERR(device);
goto failed_device;
}
/* Start the poller */
spin_lock_irqsave(&dgap_poll_lock, flags);
setup_timer(&dgap_poll_timer, dgap_poll_handler, 0);
dgap_poll_timer.data = 0;
dgap_poll_time = jiffies + dgap_jiffies_from_ms(dgap_poll_tick);
dgap_poll_timer.expires = dgap_poll_time;
spin_unlock_irqrestore(&dgap_poll_lock, flags);
add_timer(&dgap_poll_timer);
return rc;
failed_device:
class_destroy(dgap_class);
failed_class:
unregister_chrdev(DIGI_DGAP_MAJOR, "dgap");
return rc;
}
/************************************************************************
*
* Driver load/unload functions
*
************************************************************************/
/*
* init_module()
*
* Module load. This is where it all starts.
*/
static int dgap_init_module(void)
{
int rc;
pr_info("%s, Digi International Part Number %s\n", DG_NAME, DG_PART);
rc = dgap_start();
if (rc)
return rc;
rc = pci_register_driver(&dgap_driver);
if (rc) {
dgap_stop(false, NULL);
return rc;
}
rc = dgap_create_driver_sysfiles(&dgap_driver);
if (rc)
goto err_unregister;
dgap_driver_state = DRIVER_READY;
return 0;
err_unregister:
pci_unregister_driver(&dgap_driver);
return rc;
}
/*
* dgap_cleanup_module()
*
* Module unload. This is where it all ends.
*/
static void dgap_cleanup_module(void)
{
if (dgap_numboards)
pci_unregister_driver(&dgap_driver);
}
module_init(dgap_init_module);
module_exit(dgap_cleanup_module);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Digi International, http://www.digi.com");
MODULE_DESCRIPTION("Driver for the Digi International EPCA PCI based product line");
MODULE_SUPPORTED_DEVICE("dgap");