#include <linux/random.h>
#include <linux/major.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <linux/interrupt.h>
#include <linux/poll.h>
#include <linux/device.h>
return NULL;
}
-static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap,
- int max, int add_cr)
-{
- int i;
- int len = 0;
-
- for (i = NBITS(max) - 1; i > 0; i--)
- if (bitmap[i])
- break;
-
- for (; i >= 0; i--)
- len += snprintf(buf + len, max(buf_size - len, 0),
- "%lx%s", bitmap[i], i > 0 ? " " : "");
-
- if (add_cr)
- len += snprintf(buf + len, max(buf_size - len, 0), "\n");
-
- return len;
-}
-
#ifdef CONFIG_PROC_FS
static struct proc_dir_entry *proc_bus_input_dir;
wake_up(&input_devices_poll_wait);
}
-static unsigned int input_devices_poll(struct file *file, poll_table *wait)
+static unsigned int input_proc_devices_poll(struct file *file, poll_table *wait)
{
int state = input_devices_state;
poll_wait(file, &input_devices_poll_wait, wait);
return 0;
}
-#define SPRINTF_BIT(ev, bm) \
- do { \
- len += sprintf(buf + len, "B: %s=", #ev); \
- len += input_print_bitmap(buf + len, INT_MAX, \
- dev->bm##bit, ev##_MAX, 1); \
- } while (0)
+static struct list_head *list_get_nth_element(struct list_head *list, loff_t *pos)
+{
+ struct list_head *node;
+ loff_t i = 0;
-#define TEST_AND_SPRINTF_BIT(ev, bm) \
- do { \
- if (test_bit(EV_##ev, dev->evbit)) \
- SPRINTF_BIT(ev, bm); \
- } while (0)
+ list_for_each(node, list)
+ if (i++ == *pos)
+ return node;
+
+ return NULL;
+}
-static int input_devices_read(char *buf, char **start, off_t pos, int count, int *eof, void *data)
+static struct list_head *list_get_next_element(struct list_head *list, struct list_head *element, loff_t *pos)
{
- struct input_dev *dev;
- struct input_handle *handle;
- const char *path;
+ if (element->next == list)
+ return NULL;
- off_t at = 0;
- int len, cnt = 0;
+ ++(*pos);
+ return element->next;
+}
- list_for_each_entry(dev, &input_dev_list, node) {
+static void *input_devices_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ /* acquire lock here ... Yes, we do need locking, I knowi, I know... */
- path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL);
+ return list_get_nth_element(&input_dev_list, pos);
+}
- len = sprintf(buf, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n",
- dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version);
+static void *input_devices_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ return list_get_next_element(&input_dev_list, v, pos);
+}
- len += sprintf(buf + len, "N: Name=\"%s\"\n", dev->name ? dev->name : "");
- len += sprintf(buf + len, "P: Phys=%s\n", dev->phys ? dev->phys : "");
- len += sprintf(buf + len, "S: Sysfs=%s\n", path ? path : "");
- len += sprintf(buf + len, "H: Handlers=");
+static void input_devices_seq_stop(struct seq_file *seq, void *v)
+{
+ /* release lock here */
+}
- list_for_each_entry(handle, &dev->h_list, d_node)
- len += sprintf(buf + len, "%s ", handle->name);
-
- len += sprintf(buf + len, "\n");
-
- SPRINTF_BIT(EV, ev);
- TEST_AND_SPRINTF_BIT(KEY, key);
- TEST_AND_SPRINTF_BIT(REL, rel);
- TEST_AND_SPRINTF_BIT(ABS, abs);
- TEST_AND_SPRINTF_BIT(MSC, msc);
- TEST_AND_SPRINTF_BIT(LED, led);
- TEST_AND_SPRINTF_BIT(SND, snd);
- TEST_AND_SPRINTF_BIT(FF, ff);
- TEST_AND_SPRINTF_BIT(SW, sw);
-
- len += sprintf(buf + len, "\n");
-
- at += len;
-
- if (at >= pos) {
- if (!*start) {
- *start = buf + (pos - (at - len));
- cnt = at - pos;
- } else cnt += len;
- buf += len;
- if (cnt >= count)
- break;
- }
+static void input_seq_print_bitmap(struct seq_file *seq, const char *name,
+ unsigned long *bitmap, int max)
+{
+ int i;
- kfree(path);
- }
+ for (i = NBITS(max) - 1; i > 0; i--)
+ if (bitmap[i])
+ break;
+
+ seq_printf(seq, "B: %s=", name);
+ for (; i >= 0; i--)
+ seq_printf(seq, "%lx%s", bitmap[i], i > 0 ? " " : "");
+ seq_putc(seq, '\n');
+}
+
+static int input_devices_seq_show(struct seq_file *seq, void *v)
+{
+ struct input_dev *dev = container_of(v, struct input_dev, node);
+ const char *path = kobject_get_path(&dev->cdev.kobj, GFP_KERNEL);
+ struct input_handle *handle;
+
+ seq_printf(seq, "I: Bus=%04x Vendor=%04x Product=%04x Version=%04x\n",
+ dev->id.bustype, dev->id.vendor, dev->id.product, dev->id.version);
+
+ seq_printf(seq, "N: Name=\"%s\"\n", dev->name ? dev->name : "");
+ seq_printf(seq, "P: Phys=%s\n", dev->phys ? dev->phys : "");
+ seq_printf(seq, "S: Sysfs=%s\n", path ? path : "");
+ seq_printf(seq, "H: Handlers=");
- if (&dev->node == &input_dev_list)
- *eof = 1;
+ list_for_each_entry(handle, &dev->h_list, d_node)
+ seq_printf(seq, "%s ", handle->name);
+ seq_putc(seq, '\n');
- return (count > cnt) ? cnt : count;
+ input_seq_print_bitmap(seq, "EV", dev->evbit, EV_MAX);
+ if (test_bit(EV_KEY, dev->evbit))
+ input_seq_print_bitmap(seq, "KEY", dev->keybit, KEY_MAX);
+ if (test_bit(EV_REL, dev->evbit))
+ input_seq_print_bitmap(seq, "REL", dev->relbit, REL_MAX);
+ if (test_bit(EV_ABS, dev->evbit))
+ input_seq_print_bitmap(seq, "ABS", dev->absbit, ABS_MAX);
+ if (test_bit(EV_MSC, dev->evbit))
+ input_seq_print_bitmap(seq, "MSC", dev->mscbit, MSC_MAX);
+ if (test_bit(EV_LED, dev->evbit))
+ input_seq_print_bitmap(seq, "LED", dev->ledbit, LED_MAX);
+ if (test_bit(EV_SND, dev->evbit))
+ input_seq_print_bitmap(seq, "SND", dev->sndbit, SND_MAX);
+ if (test_bit(EV_FF, dev->evbit))
+ input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX);
+ if (test_bit(EV_SW, dev->evbit))
+ input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX);
+
+ seq_putc(seq, '\n');
+
+ kfree(path);
+ return 0;
}
-static int input_handlers_read(char *buf, char **start, off_t pos, int count, int *eof, void *data)
+static struct seq_operations input_devices_seq_ops = {
+ .start = input_devices_seq_start,
+ .next = input_devices_seq_next,
+ .stop = input_devices_seq_stop,
+ .show = input_devices_seq_show,
+};
+
+static int input_proc_devices_open(struct inode *inode, struct file *file)
{
- struct input_handler *handler;
+ return seq_open(file, &input_devices_seq_ops);
+}
- off_t at = 0;
- int len = 0, cnt = 0;
- int i = 0;
+static struct file_operations input_devices_fileops = {
+ .owner = THIS_MODULE,
+ .open = input_proc_devices_open,
+ .poll = input_proc_devices_poll,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
- list_for_each_entry(handler, &input_handler_list, node) {
+static void *input_handlers_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ /* acquire lock here ... Yes, we do need locking, I knowi, I know... */
+ seq->private = (void *)(unsigned long)*pos;
+ return list_get_nth_element(&input_handler_list, pos);
+}
- if (handler->fops)
- len = sprintf(buf, "N: Number=%d Name=%s Minor=%d\n",
- i++, handler->name, handler->minor);
- else
- len = sprintf(buf, "N: Number=%d Name=%s\n",
- i++, handler->name);
+static void *input_handlers_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ seq->private = (void *)(unsigned long)(*pos + 1);
+ return list_get_next_element(&input_handler_list, v, pos);
+}
- at += len;
+static void input_handlers_seq_stop(struct seq_file *seq, void *v)
+{
+ /* release lock here */
+}
- if (at >= pos) {
- if (!*start) {
- *start = buf + (pos - (at - len));
- cnt = at - pos;
- } else cnt += len;
- buf += len;
- if (cnt >= count)
- break;
- }
- }
- if (&handler->node == &input_handler_list)
- *eof = 1;
+static int input_handlers_seq_show(struct seq_file *seq, void *v)
+{
+ struct input_handler *handler = container_of(v, struct input_handler, node);
- return (count > cnt) ? cnt : count;
+ seq_printf(seq, "N: Number=%ld Name=%s",
+ (unsigned long)seq->private, handler->name);
+ if (handler->fops)
+ seq_printf(seq, " Minor=%d", handler->minor);
+ seq_putc(seq, '\n');
+
+ return 0;
}
+static struct seq_operations input_handlers_seq_ops = {
+ .start = input_handlers_seq_start,
+ .next = input_handlers_seq_next,
+ .stop = input_handlers_seq_stop,
+ .show = input_handlers_seq_show,
+};
-static struct file_operations input_fileops;
+static int input_proc_handlers_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &input_handlers_seq_ops);
+}
+
+static struct file_operations input_handlers_fileops = {
+ .owner = THIS_MODULE,
+ .open = input_proc_handlers_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
static int __init input_proc_init(void)
{
proc_bus_input_dir->owner = THIS_MODULE;
- entry = create_proc_read_entry("devices", 0, proc_bus_input_dir, input_devices_read, NULL);
+ entry = create_proc_entry("devices", 0, proc_bus_input_dir);
if (!entry)
goto fail1;
entry->owner = THIS_MODULE;
- input_fileops = *entry->proc_fops;
- input_fileops.poll = input_devices_poll;
- entry->proc_fops = &input_fileops;
+ entry->proc_fops = &input_devices_fileops;
- entry = create_proc_read_entry("handlers", 0, proc_bus_input_dir, input_handlers_read, NULL);
+ entry = create_proc_entry("handlers", 0, proc_bus_input_dir);
if (!entry)
goto fail2;
entry->owner = THIS_MODULE;
+ entry->proc_fops = &input_handlers_fileops;
return 0;
.attrs = input_dev_id_attrs,
};
+static int input_print_bitmap(char *buf, int buf_size, unsigned long *bitmap,
+ int max, int add_cr)
+{
+ int i;
+ int len = 0;
+
+ for (i = NBITS(max) - 1; i > 0; i--)
+ if (bitmap[i])
+ break;
+
+ for (; i >= 0; i--)
+ len += snprintf(buf + len, max(buf_size - len, 0),
+ "%lx%s", bitmap[i], i > 0 ? " " : "");
+
+ if (add_cr)
+ len += snprintf(buf + len, max(buf_size - len, 0), "\n");
+
+ return len;
+}
+
#define INPUT_DEV_CAP_ATTR(ev, bm) \
static ssize_t input_dev_show_cap_##bm(struct class_device *dev, char *buf) \
{ \
projects / platform / kernel / linux-rpi.git / commitdiff