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toshiba_acpi: convert to seq_file

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Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: John W. Linville <linville@tuxdriver.com>
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Alexey Dobriyan 2009-12-21 16:20:02 -08:00 committed by Len Brown
parent ff93be5dea
commit 936c8bcd7f
1 changed files with 148 additions and 113 deletions
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261
drivers/platform/x86/toshiba_acpi.c
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@ -42,6 +42,7 @@
#include <linux/init.h> #include <linux/init.h>
#include <linux/types.h> #include <linux/types.h>
#include <linux/proc_fs.h> #include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/backlight.h> #include <linux/backlight.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/rfkill.h> #include <linux/rfkill.h>
@ -357,63 +358,6 @@ static int force_fan;
static int last_key_event; static int last_key_event;
static int key_event_valid; static int key_event_valid;
typedef struct _ProcItem {
const char *name;
char *(*read_func) (char *);
unsigned long (*write_func) (const char *, unsigned long);
} ProcItem;
/* proc file handlers
*/
static int
dispatch_read(char *page, char **start, off_t off, int count, int *eof,
ProcItem * item)
{
char *p = page;
int len;
if (off == 0)
p = item->read_func(p);
/* ISSUE: I don't understand this code */
len = (p - page);
if (len <= off + count)
*eof = 1;
*start = page + off;
len -= off;
if (len > count)
len = count;
if (len < 0)
len = 0;
return len;
}
static int
dispatch_write(struct file *file, const char __user * buffer,
unsigned long count, ProcItem * item)
{
int result;
char *tmp_buffer;
/* Arg buffer points to userspace memory, which can't be accessed
* directly. Since we're making a copy, zero-terminate the
* destination so that sscanf can be used on it safely.
*/
tmp_buffer = kmalloc(count + 1, GFP_KERNEL);
if (!tmp_buffer)
return -ENOMEM;
if (copy_from_user(tmp_buffer, buffer, count)) {
result = -EFAULT;
} else {
tmp_buffer[count] = 0;
result = item->write_func(tmp_buffer, count);
}
kfree(tmp_buffer);
return result;
}
static int get_lcd(struct backlight_device *bd) static int get_lcd(struct backlight_device *bd)
{ {
u32 hci_result; u32 hci_result;
@ -426,19 +370,24 @@ static int get_lcd(struct backlight_device *bd)
return -EFAULT; return -EFAULT;
} }
static char *read_lcd(char *p) static int lcd_proc_show(struct seq_file *m, void *v)
{ {
int value = get_lcd(NULL); int value = get_lcd(NULL);
if (value >= 0) { if (value >= 0) {
p += sprintf(p, "brightness: %d\n", value); seq_printf(m, "brightness: %d\n", value);
p += sprintf(p, "brightness_levels: %d\n", seq_printf(m, "brightness_levels: %d\n",
HCI_LCD_BRIGHTNESS_LEVELS); HCI_LCD_BRIGHTNESS_LEVELS);
} else { } else {
printk(MY_ERR "Error reading LCD brightness\n"); printk(MY_ERR "Error reading LCD brightness\n");
} }
return p; return 0;
}
static int lcd_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, lcd_proc_show, NULL);
} }
static int set_lcd(int value) static int set_lcd(int value)
@ -458,12 +407,20 @@ static int set_lcd_status(struct backlight_device *bd)
return set_lcd(bd->props.brightness); return set_lcd(bd->props.brightness);
} }
static unsigned long write_lcd(const char *buffer, unsigned long count) static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
size_t count, loff_t *pos)
{ {
char cmd[42];
size_t len;
int value; int value;
int ret; int ret;
if (sscanf(buffer, " brightness : %i", &value) == 1 && len = min(count, sizeof(cmd) - 1);
if (copy_from_user(cmd, buf, len))
return -EFAULT;
cmd[len] = '\0';
if (sscanf(cmd, " brightness : %i", &value) == 1 &&
value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) { value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) {
ret = set_lcd(value); ret = set_lcd(value);
if (ret == 0) if (ret == 0)
@ -474,7 +431,16 @@ static unsigned long write_lcd(const char *buffer, unsigned long count)
return ret; return ret;
} }
static char *read_video(char *p) static const struct file_operations lcd_proc_fops = {
.owner = THIS_MODULE,
.open = lcd_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = lcd_proc_write,
};
static int video_proc_show(struct seq_file *m, void *v)
{ {
u32 hci_result; u32 hci_result;
u32 value; u32 value;
@ -484,18 +450,25 @@ static char *read_video(char *p)
int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0; int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0; int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0; int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
p += sprintf(p, "lcd_out: %d\n", is_lcd); seq_printf(m, "lcd_out: %d\n", is_lcd);
p += sprintf(p, "crt_out: %d\n", is_crt); seq_printf(m, "crt_out: %d\n", is_crt);
p += sprintf(p, "tv_out: %d\n", is_tv); seq_printf(m, "tv_out: %d\n", is_tv);
} else { } else {
printk(MY_ERR "Error reading video out status\n"); printk(MY_ERR "Error reading video out status\n");
} }
return p; return 0;
} }
static unsigned long write_video(const char *buffer, unsigned long count) static int video_proc_open(struct inode *inode, struct file *file)
{ {
return single_open(file, video_proc_show, NULL);
}
static ssize_t video_proc_write(struct file *file, const char __user *buf,
size_t count, loff_t *pos)
{
char *cmd, *buffer;
int value; int value;
int remain = count; int remain = count;
int lcd_out = -1; int lcd_out = -1;
@ -504,6 +477,17 @@ static unsigned long write_video(const char *buffer, unsigned long count)
u32 hci_result; u32 hci_result;
u32 video_out; u32 video_out;
cmd = kmalloc(count + 1, GFP_KERNEL);
if (!cmd)
return -ENOMEM;
if (copy_from_user(cmd, buf, count)) {
kfree(cmd);
return -EFAULT;
}
cmd[count] = '\0';
buffer = cmd;
/* scan expression. Multiple expressions may be delimited with ; /* scan expression. Multiple expressions may be delimited with ;
* *
* NOTE: to keep scanning simple, invalid fields are ignored * NOTE: to keep scanning simple, invalid fields are ignored
@ -523,6 +507,8 @@ static unsigned long write_video(const char *buffer, unsigned long count)
while (remain && *(buffer - 1) != ';'); while (remain && *(buffer - 1) != ';');
} }
kfree(cmd);
hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result); hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result);
if (hci_result == HCI_SUCCESS) { if (hci_result == HCI_SUCCESS) {
unsigned int new_video_out = video_out; unsigned int new_video_out = video_out;
@ -543,28 +529,50 @@ static unsigned long write_video(const char *buffer, unsigned long count)
return count; return count;
} }
static char *read_fan(char *p) static const struct file_operations video_proc_fops = {
.owner = THIS_MODULE,
.open = video_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = video_proc_write,
};
static int fan_proc_show(struct seq_file *m, void *v)
{ {
u32 hci_result; u32 hci_result;
u32 value; u32 value;
hci_read1(HCI_FAN, &value, &hci_result); hci_read1(HCI_FAN, &value, &hci_result);
if (hci_result == HCI_SUCCESS) { if (hci_result == HCI_SUCCESS) {
p += sprintf(p, "running: %d\n", (value > 0)); seq_printf(m, "running: %d\n", (value > 0));
p += sprintf(p, "force_on: %d\n", force_fan); seq_printf(m, "force_on: %d\n", force_fan);
} else { } else {
printk(MY_ERR "Error reading fan status\n"); printk(MY_ERR "Error reading fan status\n");
} }
return p; return 0;
} }
static unsigned long write_fan(const char *buffer, unsigned long count) static int fan_proc_open(struct inode *inode, struct file *file)
{ {
return single_open(file, fan_proc_show, NULL);
}
static ssize_t fan_proc_write(struct file *file, const char __user *buf,
size_t count, loff_t *pos)
{
char cmd[42];
size_t len;
int value; int value;
u32 hci_result; u32 hci_result;
if (sscanf(buffer, " force_on : %i", &value) == 1 && len = min(count, sizeof(cmd) - 1);
if (copy_from_user(cmd, buf, len))
return -EFAULT;
cmd[len] = '\0';
if (sscanf(cmd, " force_on : %i", &value) == 1 &&
value >= 0 && value <= 1) { value >= 0 && value <= 1) {
hci_write1(HCI_FAN, value, &hci_result); hci_write1(HCI_FAN, value, &hci_result);
if (hci_result != HCI_SUCCESS) if (hci_result != HCI_SUCCESS)
@ -578,7 +586,16 @@ static unsigned long write_fan(const char *buffer, unsigned long count)
return count; return count;
} }
static char *read_keys(char *p) static const struct file_operations fan_proc_fops = {
.owner = THIS_MODULE,
.open = fan_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = fan_proc_write,
};
static int keys_proc_show(struct seq_file *m, void *v)
{ {
u32 hci_result; u32 hci_result;
u32 value; u32 value;
@ -602,18 +619,30 @@ static char *read_keys(char *p)
} }
} }
p += sprintf(p, "hotkey_ready: %d\n", key_event_valid); seq_printf(m, "hotkey_ready: %d\n", key_event_valid);
p += sprintf(p, "hotkey: 0x%04x\n", last_key_event); seq_printf(m, "hotkey: 0x%04x\n", last_key_event);
end:
end: return 0;
return p;
} }
static unsigned long write_keys(const char *buffer, unsigned long count) static int keys_proc_open(struct inode *inode, struct file *file)
{ {
return single_open(file, keys_proc_show, NULL);
}
static ssize_t keys_proc_write(struct file *file, const char __user *buf,
size_t count, loff_t *pos)
{
char cmd[42];
size_t len;
int value; int value;
if (sscanf(buffer, " hotkey_ready : %i", &value) == 1 && value == 0) { len = min(count, sizeof(cmd) - 1);
if (copy_from_user(cmd, buf, len))
return -EFAULT;
cmd[len] = '\0';
if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) {
key_event_valid = 0; key_event_valid = 0;
} else { } else {
return -EINVAL; return -EINVAL;
@ -622,52 +651,58 @@ static unsigned long write_keys(const char *buffer, unsigned long count)
return count; return count;
} }
static char *read_version(char *p) static const struct file_operations keys_proc_fops = {
.owner = THIS_MODULE,
.open = keys_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = keys_proc_write,
};
static int version_proc_show(struct seq_file *m, void *v)
{ {
p += sprintf(p, "driver: %s\n", TOSHIBA_ACPI_VERSION); seq_printf(m, "driver: %s\n", TOSHIBA_ACPI_VERSION);
p += sprintf(p, "proc_interface: %d\n", seq_printf(m, "proc_interface: %d\n", PROC_INTERFACE_VERSION);
PROC_INTERFACE_VERSION); return 0;
return p;
} }
static int version_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, version_proc_show, PDE(inode)->data);
}
static const struct file_operations version_proc_fops = {
.owner = THIS_MODULE,
.open = version_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/* proc and module init /* proc and module init
*/ */
#define PROC_TOSHIBA "toshiba" #define PROC_TOSHIBA "toshiba"
static ProcItem proc_items[] = {
{"lcd", read_lcd, write_lcd},
{"video", read_video, write_video},
{"fan", read_fan, write_fan},
{"keys", read_keys, write_keys},
{"version", read_version, NULL},
{NULL}
};
static acpi_status __init add_device(void) static acpi_status __init add_device(void)
{ {
struct proc_dir_entry *proc; proc_create("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir, &lcd_proc_fops);
ProcItem *item; proc_create("video", S_IRUGO | S_IWUSR, toshiba_proc_dir, &video_proc_fops);
proc_create("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir, &fan_proc_fops);
for (item = proc_items; item->name; ++item) { proc_create("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir, &keys_proc_fops);
proc = create_proc_read_entry(item->name, proc_create("version", S_IRUGO, toshiba_proc_dir, &version_proc_fops);
S_IFREG | S_IRUGO | S_IWUSR,
toshiba_proc_dir,
(read_proc_t *) dispatch_read,
item);
if (proc && item->write_func)
proc->write_proc = (write_proc_t *) dispatch_write;
}
return AE_OK; return AE_OK;
} }
static acpi_status remove_device(void) static acpi_status remove_device(void)
{ {
ProcItem *item; remove_proc_entry("lcd", toshiba_proc_dir);
remove_proc_entry("video", toshiba_proc_dir);
for (item = proc_items; item->name; ++item) remove_proc_entry("fan", toshiba_proc_dir);
remove_proc_entry(item->name, toshiba_proc_dir); remove_proc_entry("keys", toshiba_proc_dir);
remove_proc_entry("version", toshiba_proc_dir);
return AE_OK; return AE_OK;
} }