- 根目录:
- drivers
- pnp
- interface.c
/*
* interface.c - contains everything related to the user interface
*
* Some code, especially possible resource dumping is based on isapnp_proc.c (c) Jaroslav Kysela <perex@perex.cz>
* Copyright 2002 Adam Belay <ambx1@neo.rr.com>
* Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
* Bjorn Helgaas <bjorn.helgaas@hp.com>
*/
#include <linux/pnp.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/stat.h>
#include <linux/ctype.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
#include "base.h"
struct pnp_info_buffer {
char *buffer; /* pointer to begin of buffer */
char *curr; /* current position in buffer */
unsigned long size; /* current size */
unsigned long len; /* total length of buffer */
int stop; /* stop flag */
int error; /* error code */
};
typedef struct pnp_info_buffer pnp_info_buffer_t;
static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
{
va_list args;
int res;
if (buffer->stop || buffer->error)
return 0;
va_start(args, fmt);
res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);
va_end(args);
if (buffer->size + res >= buffer->len) {
buffer->stop = 1;
return 0;
}
buffer->curr += res;
buffer->size += res;
return res;
}
static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
struct pnp_port *port)
{
pnp_printf(buffer, "%sport %#llx-%#llx, align %#llx, size %#llx, "
"%i-bit address decoding\n", space,
(unsigned long long) port->min,
(unsigned long long) port->max,
port->align ? ((unsigned long long) port->align - 1) : 0,
(unsigned long long) port->size,
port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10);
}
static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
struct pnp_irq *irq)
{
int first = 1, i;
pnp_printf(buffer, "%sirq ", space);
for (i = 0; i < PNP_IRQ_NR; i++)
if (test_bit(i, irq->map.bits)) {
if (!first) {
pnp_printf(buffer, ",");
} else {
first = 0;
}
if (i == 2 || i == 9)
pnp_printf(buffer, "2/9");
else
pnp_printf(buffer, "%i", i);
}
if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
pnp_printf(buffer, "<none>");
if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
pnp_printf(buffer, " High-Edge");
if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
pnp_printf(buffer, " Low-Edge");
if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
pnp_printf(buffer, " High-Level");
if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
pnp_printf(buffer, " Low-Level");
if (irq->flags & IORESOURCE_IRQ_OPTIONAL)
pnp_printf(buffer, " (optional)");
pnp_printf(buffer, "\n");
}
static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
struct pnp_dma *dma)
{
int first = 1, i;
char *s;
pnp_printf(buffer, "%sdma ", space);
for (i = 0; i < 8; i++)
if (dma->map & (1 << i)) {
if (!first) {
pnp_printf(buffer, ",");
} else {
first = 0;
}
pnp_printf(buffer, "%i", i);
}
if (!dma->map)
pnp_printf(buffer, "<none>");
switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
case IORESOURCE_DMA_8BIT:
s = "8-bit";
break;
case IORESOURCE_DMA_8AND16BIT:
s = "8-bit&16-bit";
break;
default:
s = "16-bit";
}
pnp_printf(buffer, " %s", s);
if (dma->flags & IORESOURCE_DMA_MASTER)
pnp_printf(buffer, " master");
if (dma->flags & IORESOURCE_DMA_BYTE)
pnp_printf(buffer, " byte-count");
if (dma->flags & IORESOURCE_DMA_WORD)
pnp_printf(buffer, " word-count");
switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
case IORESOURCE_DMA_TYPEA:
s = "type-A";
break;
case IORESOURCE_DMA_TYPEB:
s = "type-B";
break;
case IORESOURCE_DMA_TYPEF:
s = "type-F";
break;
default:
s = "compatible";
break;
}
pnp_printf(buffer, " %s\n", s);
}
static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
struct pnp_mem *mem)
{
char *s;
pnp_printf(buffer, "%sMemory %#llx-%#llx, align %#llx, size %#llx",
space, (unsigned long long) mem->min,
(unsigned long long) mem->max,
(unsigned long long) mem->align,
(unsigned long long) mem->size);
if (mem->flags & IORESOURCE_MEM_WRITEABLE)
pnp_printf(buffer, ", writeable");
if (mem->flags & IORESOURCE_MEM_CACHEABLE)
pnp_printf(buffer, ", cacheable");
if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
pnp_printf(buffer, ", range-length");
if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
pnp_printf(buffer, ", shadowable");
if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
pnp_printf(buffer, ", expansion ROM");
switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
case IORESOURCE_MEM_8BIT:
s = "8-bit";
break;
case IORESOURCE_MEM_8AND16BIT:
s = "8-bit&16-bit";
break;
case IORESOURCE_MEM_32BIT:
s = "32-bit";
break;
default:
s = "16-bit";
}
pnp_printf(buffer, ", %s\n", s);
}
static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
struct pnp_option *option)
{
switch (option->type) {
case IORESOURCE_IO:
pnp_print_port(buffer, space, &option->u.port);
break;
case IORESOURCE_MEM:
pnp_print_mem(buffer, space, &option->u.mem);
break;
case IORESOURCE_IRQ:
pnp_print_irq(buffer, space, &option->u.irq);
break;
case IORESOURCE_DMA:
pnp_print_dma(buffer, space, &option->u.dma);
break;
}
}
static ssize_t pnp_show_options(struct device *dmdev,
struct device_attribute *attr, char *buf)
{
struct pnp_dev *dev = to_pnp_dev(dmdev);
pnp_info_buffer_t *buffer;
struct pnp_option *option;
int ret, dep = 0, set = 0;
char *indent;
buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
if (!buffer)
return -ENOMEM;
buffer->len = PAGE_SIZE;
buffer->buffer = buf;
buffer->curr = buffer->buffer;
list_for_each_entry(option, &dev->options, list) {
if (pnp_option_is_dependent(option)) {
indent = " ";
if (!dep || pnp_option_set(option) != set) {
set = pnp_option_set(option);
dep = 1;
pnp_printf(buffer, "Dependent: %02i - "
"Priority %s\n", set,
pnp_option_priority_name(option));
}
} else {
dep = 0;
indent = "";
}
pnp_print_option(buffer, indent, option);
}
ret = (buffer->curr - buf);
kfree(buffer);
return ret;
}
static ssize_t pnp_show_current_resources(struct device *dmdev,
struct device_attribute *attr,
char *buf)
{
struct pnp_dev *dev = to_pnp_dev(dmdev);
pnp_info_buffer_t *buffer;
struct pnp_resource *pnp_res;
struct resource *res;
int ret;
if (!dev)
return -EINVAL;
buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
if (!buffer)
return -ENOMEM;
buffer->len = PAGE_SIZE;
buffer->buffer = buf;
buffer->curr = buffer->buffer;
pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");
list_for_each_entry(pnp_res, &dev->resources, list) {
res = &pnp_res->res;
pnp_printf(buffer, pnp_resource_type_name(res));
if (res->flags & IORESOURCE_DISABLED) {
pnp_printf(buffer, " disabled\n");
continue;
}
switch (pnp_resource_type(res)) {
case IORESOURCE_IO:
case IORESOURCE_MEM:
case IORESOURCE_BUS:
pnp_printf(buffer, " %#llx-%#llx%s\n",
(unsigned long long) res->start,
(unsigned long long) res->end,
res->flags & IORESOURCE_WINDOW ?
" window" : "");
break;
case IORESOURCE_IRQ:
case IORESOURCE_DMA:
pnp_printf(buffer, " %lld\n",
(unsigned long long) res->start);
break;
}
}
ret = (buffer->curr - buf);
kfree(buffer);
return ret;
}
static ssize_t pnp_set_current_resources(struct device *dmdev,
struct device_attribute *attr,
const char *ubuf, size_t count)
{
struct pnp_dev *dev = to_pnp_dev(dmdev);
char *buf = (void *)ubuf;
int retval = 0;
resource_size_t start, end;
if (dev->status & PNP_ATTACHED) {
retval = -EBUSY;
dev_info(&dev->dev, "in use; can't configure\n");
goto done;
}
buf = skip_spaces(buf);
if (!strnicmp(buf, "disable", 7)) {
retval = pnp_disable_dev(dev);
goto done;
}
if (!strnicmp(buf, "activate", 8)) {
retval = pnp_activate_dev(dev);
goto done;
}
if (!strnicmp(buf, "fill", 4)) {
if (dev->active)
goto done;
retval = pnp_auto_config_dev(dev);
goto done;
}
if (!strnicmp(buf, "auto", 4)) {
if (dev->active)
goto done;
pnp_init_resources(dev);
retval = pnp_auto_config_dev(dev);
goto done;
}
if (!strnicmp(buf, "clear", 5)) {
if (dev->active)
goto done;
pnp_init_resources(dev);
goto done;
}
if (!strnicmp(buf, "get", 3)) {
mutex_lock(&pnp_res_mutex);
if (pnp_can_read(dev))
dev->protocol->get(dev);
mutex_unlock(&pnp_res_mutex);
goto done;
}
if (!strnicmp(buf, "set", 3)) {
if (dev->active)
goto done;
buf += 3;
pnp_init_resources(dev);
mutex_lock(&pnp_res_mutex);
while (1) {
buf = skip_spaces(buf);
if (!strnicmp(buf, "io", 2)) {
buf = skip_spaces(buf + 2);
start = simple_strtoul(buf, &buf, 0);
buf = skip_spaces(buf);
if (*buf == '-') {
buf = skip_spaces(buf + 1);
end = simple_strtoul(buf, &buf, 0);
} else
end = start;
pnp_add_io_resource(dev, start, end, 0);
continue;
}
if (!strnicmp(buf, "mem", 3)) {
buf = skip_spaces(buf + 3);
start = simple_strtoul(buf, &buf, 0);
buf = skip_spaces(buf);
if (*buf == '-') {
buf = skip_spaces(buf + 1);
end = simple_strtoul(buf, &buf, 0);
} else
end = start;
pnp_add_mem_resource(dev, start, end, 0);
continue;
}
if (!strnicmp(buf, "irq", 3)) {
buf = skip_spaces(buf + 3);
start = simple_strtoul(buf, &buf, 0);
pnp_add_irq_resource(dev, start, 0);
continue;
}
if (!strnicmp(buf, "dma", 3)) {
buf = skip_spaces(buf + 3);
start = simple_strtoul(buf, &buf, 0);
pnp_add_dma_resource(dev, start, 0);
continue;
}
break;
}
mutex_unlock(&pnp_res_mutex);
goto done;
}
done:
if (retval < 0)
return retval;
return count;
}
static ssize_t pnp_show_current_ids(struct device *dmdev,
struct device_attribute *attr, char *buf)
{
char *str = buf;
struct pnp_dev *dev = to_pnp_dev(dmdev);
struct pnp_id *pos = dev->id;
while (pos) {
str += sprintf(str, "%s\n", pos->id);
pos = pos->next;
}
return (str - buf);
}
struct device_attribute pnp_interface_attrs[] = {
__ATTR(resources, S_IRUGO | S_IWUSR,
pnp_show_current_resources,
pnp_set_current_resources),
__ATTR(options, S_IRUGO, pnp_show_options, NULL),
__ATTR(id, S_IRUGO, pnp_show_current_ids, NULL),
__ATTR_NULL,
};