- 根目录:
- drivers
- pcmcia
- vrc4173_cardu.c
/*
* FILE NAME
* drivers/pcmcia/vrc4173_cardu.c
*
* BRIEF MODULE DESCRIPTION
* NEC VRC4173 CARDU driver for Socket Services
* (This device doesn't support CardBus. it is supporting only 16bit PC Card.)
*
* Copyright 2002,2003 Yoichi Yuasa <yuasa@linux-mips.org>
*
* 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 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <asm/io.h>
#include <pcmcia/ss.h>
#include "vrc4173_cardu.h"
MODULE_DESCRIPTION("NEC VRC4173 CARDU driver for Socket Services");
MODULE_AUTHOR("Yoichi Yuasa <yuasa@linux-mips.org>");
MODULE_LICENSE("GPL");
static int vrc4173_cardu_slots;
static vrc4173_socket_t cardu_sockets[CARDU_MAX_SOCKETS];
extern struct socket_info_t *pcmcia_register_socket (int slot,
struct pccard_operations *vtable,
int use_bus_pm);
extern void pcmcia_unregister_socket(struct socket_info_t *s);
static inline uint8_t exca_readb(vrc4173_socket_t *socket, uint16_t offset)
{
return readb(socket->base + EXCA_REGS_BASE + offset);
}
static inline uint16_t exca_readw(vrc4173_socket_t *socket, uint16_t offset)
{
uint16_t val;
val = readb(socket->base + EXCA_REGS_BASE + offset);
val |= (u16)readb(socket->base + EXCA_REGS_BASE + offset + 1) << 8;
return val;
}
static inline void exca_writeb(vrc4173_socket_t *socket, uint16_t offset, uint8_t val)
{
writeb(val, socket->base + EXCA_REGS_BASE + offset);
}
static inline void exca_writew(vrc4173_socket_t *socket, uint8_t offset, uint16_t val)
{
writeb((u8)val, socket->base + EXCA_REGS_BASE + offset);
writeb((u8)(val >> 8), socket->base + EXCA_REGS_BASE + offset + 1);
}
static inline uint32_t cardbus_socket_readl(vrc4173_socket_t *socket, u16 offset)
{
return readl(socket->base + CARDBUS_SOCKET_REGS_BASE + offset);
}
static inline void cardbus_socket_writel(vrc4173_socket_t *socket, u16 offset, uint32_t val)
{
writel(val, socket->base + CARDBUS_SOCKET_REGS_BASE + offset);
}
static void cardu_pciregs_init(struct pci_dev *dev)
{
u32 syscnt;
u16 brgcnt;
u8 devcnt;
pci_write_config_dword(dev, 0x1c, 0x10000000);
pci_write_config_dword(dev, 0x20, 0x17fff000);
pci_write_config_dword(dev, 0x2c, 0);
pci_write_config_dword(dev, 0x30, 0xfffc);
pci_read_config_word(dev, BRGCNT, &brgcnt);
brgcnt &= ~IREQ_INT;
pci_write_config_word(dev, BRGCNT, brgcnt);
pci_read_config_dword(dev, SYSCNT, &syscnt);
syscnt &= ~(BAD_VCC_REQ_DISB|PCPCI_EN|CH_ASSIGN_MASK|SUB_ID_WR_EN|PCI_CLK_RIN);
syscnt |= (CH_ASSIGN_NODMA|ASYN_INT_MODE);
pci_write_config_dword(dev, SYSCNT, syscnt);
pci_read_config_byte(dev, DEVCNT, &devcnt);
devcnt &= ~(ZOOM_VIDEO_EN|SR_PCI_INT_SEL_MASK|PCI_INT_MODE|IRQ_MODE);
devcnt |= (SR_PCI_INT_SEL_NONE|IFG);
pci_write_config_byte(dev, DEVCNT, devcnt);
pci_write_config_byte(dev, CHIPCNT, S_PREF_DISB);
pci_write_config_byte(dev, SERRDIS, 0);
}
static int cardu_init(unsigned int slot)
{
vrc4173_socket_t *socket = &cardu_sockets[slot];
cardu_pciregs_init(socket->dev);
/* CARD_SC bits are cleared by reading CARD_SC. */
exca_writeb(socket, GLO_CNT, 0);
socket->cap.features |= SS_CAP_PCCARD | SS_CAP_PAGE_REGS;
socket->cap.irq_mask = 0;
socket->cap.map_size = 0x1000;
socket->cap.pci_irq = socket->dev->irq;
socket->events = 0;
spin_lock_init(socket->event_lock);
/* Enable PC Card status interrupts */
exca_writeb(socket, CARD_SCI, CARD_DT_EN|RDY_EN|BAT_WAR_EN|BAT_DEAD_EN);
return 0;
}
static int cardu_register_callback(unsigned int sock,
void (*handler)(void *, unsigned int),
void * info)
{
vrc4173_socket_t *socket = &cardu_sockets[sock];
socket->handler = handler;
socket->info = info;
return 0;
}
static int cardu_inquire_socket(unsigned int sock, socket_cap_t *cap)
{
vrc4173_socket_t *socket = &cardu_sockets[sock];
*cap = socket->cap;
return 0;
}
static int cardu_get_status(unsigned int sock, u_int *value)
{
vrc4173_socket_t *socket = &cardu_sockets[sock];
uint32_t state;
uint8_t status;
u_int val = 0;
status = exca_readb(socket, IF_STATUS);
if (status & CARD_PWR) val |= SS_POWERON;
if (status & READY) val |= SS_READY;
if (status & CARD_WP) val |= SS_WRPROT;
if ((status & (CARD_DETECT1|CARD_DETECT2)) == (CARD_DETECT1|CARD_DETECT2))
val |= SS_DETECT;
if (exca_readb(socket, INT_GEN_CNT) & CARD_TYPE_IO) {
if (status & STSCHG) val |= SS_STSCHG;
} else {
status &= BV_DETECT_MASK;
if (status != BV_DETECT_GOOD) {
if (status == BV_DETECT_WARN) val |= SS_BATWARN;
else val |= SS_BATDEAD;
}
}
state = cardbus_socket_readl(socket, SKT_PRE_STATE);
if (state & VOL_3V_CARD_DT) val |= SS_3VCARD;
if (state & VOL_XV_CARD_DT) val |= SS_XVCARD;
if (state & CB_CARD_DT) val |= SS_CARDBUS;
if (!(state &
(VOL_YV_CARD_DT|VOL_XV_CARD_DT|VOL_3V_CARD_DT|VOL_5V_CARD_DT|CCD20|CCD10)))
val |= SS_PENDING;
*value = val;
return 0;
}
static inline uint8_t set_Vcc_value(u_char Vcc)
{
switch (Vcc) {
case 33:
return VCC_3V;
case 50:
return VCC_5V;
}
return VCC_0V;
}
static inline uint8_t set_Vpp_value(u_char Vpp)
{
switch (Vpp) {
case 33:
case 50:
return VPP_VCC;
case 120:
return VPP_12V;
}
return VPP_0V;
}
static int cardu_set_socket(unsigned int sock, socket_state_t *state)
{
vrc4173_socket_t *socket = &cardu_sockets[sock];
uint8_t val;
if (((state->Vpp == 33) || (state->Vpp == 50)) && (state->Vpp != state->Vcc))
return -EINVAL;
val = set_Vcc_value(state->Vcc);
val |= set_Vpp_value(state->Vpp);
if (state->flags & SS_OUTPUT_ENA) val |= CARD_OUT_EN;
exca_writeb(socket, PWR_CNT, val);
val = exca_readb(socket, INT_GEN_CNT) & CARD_REST0;
if (state->flags & SS_RESET) val &= ~CARD_REST0;
else val |= CARD_REST0;
if (state->flags & SS_IOCARD) val |= CARD_TYPE_IO;
exca_writeb(socket, INT_GEN_CNT, val);
return 0;
}
static int cardu_get_io_map(unsigned int sock, struct pccard_io_map *io)
{
vrc4173_socket_t *socket = &cardu_sockets[sock];
uint8_t ioctl, window;
u_char map;
map = io->map;
if (map > 1)
return -EINVAL;
io->start = exca_readw(socket, IO_WIN_SA(map));
io->stop = exca_readw(socket, IO_WIN_EA(map));
ioctl = exca_readb(socket, IO_WIN_CNT);
window = exca_readb(socket, ADR_WIN_EN);
io->flags = (window & IO_WIN_EN(map)) ? MAP_ACTIVE : 0;
if (ioctl & IO_WIN_DATA_AUTOSZ(map))
io->flags |= MAP_AUTOSZ;
else if (ioctl & IO_WIN_DATA_16BIT(map))
io->flags |= MAP_16BIT;
return 0;
}
static int cardu_set_io_map(unsigned int sock, struct pccard_io_map *io)
{
vrc4173_socket_t *socket = &cardu_sockets[sock];
uint16_t ioctl;
uint8_t window, enable;
u_char map;
map = io->map;
if (map > 1)
return -EINVAL;
window = exca_readb(socket, ADR_WIN_EN);
enable = IO_WIN_EN(map);
if (window & enable) {
window &= ~enable;
exca_writeb(socket, ADR_WIN_EN, window);
}
exca_writew(socket, IO_WIN_SA(map), io->start);
exca_writew(socket, IO_WIN_EA(map), io->stop);
ioctl = exca_readb(socket, IO_WIN_CNT) & ~IO_WIN_CNT_MASK(map);
if (io->flags & MAP_AUTOSZ) ioctl |= IO_WIN_DATA_AUTOSZ(map);
else if (io->flags & MAP_16BIT) ioctl |= IO_WIN_DATA_16BIT(map);
exca_writeb(socket, IO_WIN_CNT, ioctl);
if (io->flags & MAP_ACTIVE)
exca_writeb(socket, ADR_WIN_EN, window | enable);
return 0;
}
static int cardu_get_mem_map(unsigned int sock, struct pccard_mem_map *mem)
{
vrc4173_socket_t *socket = &cardu_sockets[sock];
uint32_t start, stop, offset, page;
uint8_t window;
u_char map;
map = mem->map;
if (map > 4)
return -EINVAL;
window = exca_readb(socket, ADR_WIN_EN);
mem->flags = (window & MEM_WIN_EN(map)) ? MAP_ACTIVE : 0;
start = exca_readw(socket, MEM_WIN_SA(map));
mem->flags |= (start & MEM_WIN_DSIZE) ? MAP_16BIT : 0;
start = (start & 0x0fff) << 12;
stop = exca_readw(socket, MEM_WIN_EA(map));
stop = ((stop & 0x0fff) << 12) + 0x0fff;
offset = exca_readw(socket, MEM_WIN_OA(map));
mem->flags |= (offset & MEM_WIN_WP) ? MAP_WRPROT : 0;
mem->flags |= (offset & MEM_WIN_REGSET) ? MAP_ATTRIB : 0;
offset = ((offset & 0x3fff) << 12) + start;
mem->card_start = offset & 0x03ffffff;
page = exca_readb(socket, MEM_WIN_SAU(map)) << 24;
mem->sys_start = start + page;
mem->sys_stop = start + page;
return 0;
}
static int cardu_set_mem_map(unsigned int sock, struct pccard_mem_map *mem)
{
vrc4173_socket_t *socket = &cardu_sockets[sock];
uint16_t value;
uint8_t window, enable;
u_long sys_start, sys_stop, card_start;
u_char map;
map = mem->map;
sys_start = mem->sys_start;
sys_stop = mem->sys_stop;
card_start = mem->card_start;
if (map > 4 || sys_start > sys_stop || ((sys_start ^ sys_stop) >> 24) ||
(card_start >> 26))
return -EINVAL;
window = exca_readb(socket, ADR_WIN_EN);
enable = MEM_WIN_EN(map);
if (window & enable) {
window &= ~enable;
exca_writeb(socket, ADR_WIN_EN, window);
}
exca_writeb(socket, MEM_WIN_SAU(map), sys_start >> 24);
value = (sys_start >> 12) & 0x0fff;
if (mem->flags & MAP_16BIT) value |= MEM_WIN_DSIZE;
exca_writew(socket, MEM_WIN_SA(map), value);
value = (sys_stop >> 12) & 0x0fff;
exca_writew(socket, MEM_WIN_EA(map), value);
value = ((card_start - sys_start) >> 12) & 0x3fff;
if (mem->flags & MAP_WRPROT) value |= MEM_WIN_WP;
if (mem->flags & MAP_ATTRIB) value |= MEM_WIN_REGSET;
exca_writew(socket, MEM_WIN_OA(map), value);
if (mem->flags & MAP_ACTIVE)
exca_writeb(socket, ADR_WIN_EN, window | enable);
return 0;
}
static void cardu_proc_setup(unsigned int sock, struct proc_dir_entry *base)
{
}
static struct pccard_operations cardu_operations = {
.init = cardu_init,
.register_callback = cardu_register_callback,
.inquire_socket = cardu_inquire_socket,
.get_status = cardu_get_status,
.set_socket = cardu_set_socket,
.get_io_map = cardu_get_io_map,
.set_io_map = cardu_set_io_map,
.get_mem_map = cardu_get_mem_map,
.set_mem_map = cardu_set_mem_map,
.proc_setup = cardu_proc_setup,
};
static void cardu_bh(void *data)
{
vrc4173_socket_t *socket = (vrc4173_socket_t *)data;
uint16_t events;
spin_lock_irq(&socket->event_lock);
events = socket->events;
socket->events = 0;
spin_unlock_irq(&socket->event_lock);
if (socket->handler)
socket->handler(socket->info, events);
}
static uint16_t get_events(vrc4173_socket_t *socket)
{
uint16_t events = 0;
uint8_t csc, status;
status = exca_readb(socket, IF_STATUS);
csc = exca_readb(socket, CARD_SC);
if ((csc & CARD_DT_CHG) &&
((status & (CARD_DETECT1|CARD_DETECT2)) == (CARD_DETECT1|CARD_DETECT2)))
events |= SS_DETECT;
if ((csc & RDY_CHG) && (status & READY))
events |= SS_READY;
if (exca_readb(socket, INT_GEN_CNT) & CARD_TYPE_IO) {
if ((csc & BAT_DEAD_ST_CHG) && (status & STSCHG))
events |= SS_STSCHG;
} else {
if (csc & (BAT_WAR_CHG|BAT_DEAD_ST_CHG)) {
if ((status & BV_DETECT_MASK) != BV_DETECT_GOOD) {
if (status == BV_DETECT_WARN) events |= SS_BATWARN;
else events |= SS_BATDEAD;
}
}
}
return events;
}
static void cardu_interrupt(int irq, void *dev_id)
{
vrc4173_socket_t *socket = (vrc4173_socket_t *)dev_id;
uint16_t events;
INIT_WORK(&socket->tq_work, cardu_bh, socket);
events = get_events(socket);
if (events) {
spin_lock(&socket->event_lock);
socket->events |= events;
spin_unlock(&socket->event_lock);
schedule_work(&socket->tq_work);
}
}
static int vrc4173_cardu_probe(struct pci_dev *dev,
const struct pci_device_id *ent)
{
vrc4173_socket_t *socket;
unsigned long start, len, flags;
int slot, err, ret;
slot = vrc4173_cardu_slots++;
socket = &cardu_sockets[slot];
if (socket->noprobe != 0)
return -EBUSY;
sprintf(socket->name, "NEC VRC4173 CARDU%1d", slot+1);
if ((err = pci_enable_device(dev)) < 0)
return err;
start = pci_resource_start(dev, 0);
if (start == 0) {
ret = -ENODEV;
goto disable;
}
len = pci_resource_len(dev, 0);
if (len == 0) {
ret = -ENODEV;
goto disable;
}
flags = pci_resource_flags(dev, 0);
if ((flags & IORESOURCE_MEM) == 0) {
ret = -EBUSY;
goto disable;
}
err = pci_request_regions(dev, socket->name);
if (err < 0) {
ret = err;
goto disable;
}
socket->base = ioremap(start, len);
if (socket->base == NULL) {
ret = -ENODEV;
goto release;
}
socket->dev = dev;
socket->pcmcia_socket = pcmcia_register_socket(slot, &cardu_operations, 1);
if (socket->pcmcia_socket == NULL) {
ret = -ENOMEM;
goto unmap;
}
if (request_irq(dev->irq, cardu_interrupt, IRQF_SHARED, socket->name, socket) < 0) {
ret = -EBUSY;
goto unregister;
}
printk(KERN_INFO "%s at %#08lx, IRQ %d\n", socket->name, start, dev->irq);
return 0;
unregister:
pcmcia_unregister_socket(socket->pcmcia_socket);
socket->pcmcia_socket = NULL;
unmap:
iounmap(socket->base);
socket->base = NULL;
release:
pci_release_regions(dev);
disable:
pci_disable_device(dev);
return ret;
}
static int vrc4173_cardu_setup(char *options)
{
if (options == NULL || *options == '\0')
return 1;
if (strncmp(options, "cardu1:", 7) == 0) {
options += 7;
if (*options != '\0') {
if (strncmp(options, "noprobe", 7) == 0) {
cardu_sockets[CARDU1].noprobe = 1;
options += 7;
}
if (*options != ',')
return 1;
} else
return 1;
}
if (strncmp(options, "cardu2:", 7) == 0) {
options += 7;
if ((*options != '\0') && (strncmp(options, "noprobe", 7) == 0))
cardu_sockets[CARDU2].noprobe = 1;
}
return 1;
}
__setup("vrc4173_cardu=", vrc4173_cardu_setup);
static DEFINE_PCI_DEVICE_TABLE(vrc4173_cardu_id_table) = {
{ PCI_DEVICE(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_NAPCCARD) },
{0, }
};
static struct pci_driver vrc4173_cardu_driver = {
.name = "NEC VRC4173 CARDU",
.probe = vrc4173_cardu_probe,
.id_table = vrc4173_cardu_id_table,
};
static int vrc4173_cardu_init(void)
{
vrc4173_cardu_slots = 0;
return pci_register_driver(&vrc4173_cardu_driver);
}
static void vrc4173_cardu_exit(void)
{
pci_unregister_driver(&vrc4173_cardu_driver);
}
module_init(vrc4173_cardu_init);
module_exit(vrc4173_cardu_exit);
MODULE_DEVICE_TABLE(pci, vrc4173_cardu_id_table);