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