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HID: wiimote: Allow direct DRM debug access

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Keep track of current drm and add new debugfs file which reads or writes the
current DRM.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
David Herrmann 2011-11-17 14:12:12 +01:00 committed by Jiri Kosina
parent 1d3452c63d
commit 43d782ae80
3 changed files with 107 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/hid/hid-wiimote-core.c
View File

@ -238,6 +238,7 @@ void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm)
cmd[1] = 0;
cmd[2] = drm;
wdata->state.drm = drm;
wiiproto_keep_rumble(wdata, &cmd[1]);
wiimote_queue(wdata, cmd, sizeof(cmd));
}
@ -1141,6 +1142,7 @@ static struct wiimote_data *wiimote_create(struct hid_device *hdev)
spin_lock_init(&wdata->state.lock);
init_completion(&wdata->state.ready);
mutex_init(&wdata->state.sync);
wdata->state.drm = WIIPROTO_REQ_DRM_K;
return wdata;

107
drivers/hid/hid-wiimote-debug.c
View File

@ -12,6 +12,7 @@
#include <linux/debugfs.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/spinlock.h>
#include <linux/uaccess.h>
#include "hid-wiimote.h"
@ -19,6 +20,7 @@
struct wiimote_debug {
struct wiimote_data *wdata;
struct dentry *eeprom;
struct dentry *drm;
};
static int wiidebug_eeprom_open(struct inode *i, struct file *f)
@ -86,10 +88,97 @@ static const struct file_operations wiidebug_eeprom_fops = {
.llseek = generic_file_llseek,
};
static const char *wiidebug_drmmap[] = {
[WIIPROTO_REQ_NULL] = "NULL",
[WIIPROTO_REQ_DRM_K] = "K",
[WIIPROTO_REQ_DRM_KA] = "KA",
[WIIPROTO_REQ_DRM_KE] = "KE",
[WIIPROTO_REQ_DRM_KAI] = "KAI",
[WIIPROTO_REQ_DRM_KEE] = "KEE",
[WIIPROTO_REQ_DRM_KAE] = "KAE",
[WIIPROTO_REQ_DRM_KIE] = "KIE",
[WIIPROTO_REQ_DRM_KAIE] = "KAIE",
[WIIPROTO_REQ_DRM_E] = "E",
[WIIPROTO_REQ_DRM_SKAI1] = "SKAI1",
[WIIPROTO_REQ_DRM_SKAI2] = "SKAI2",
[WIIPROTO_REQ_MAX] = NULL
};
static int wiidebug_drm_show(struct seq_file *f, void *p)
{
struct wiimote_debug *dbg = f->private;
const char *str = NULL;
unsigned long flags;
__u8 drm;
spin_lock_irqsave(&dbg->wdata->state.lock, flags);
drm = dbg->wdata->state.drm;
spin_unlock_irqrestore(&dbg->wdata->state.lock, flags);
if (drm < WIIPROTO_REQ_MAX)
str = wiidebug_drmmap[drm];
if (!str)
str = "unknown";
seq_printf(f, "%s\n", str);
return 0;
}
static int wiidebug_drm_open(struct inode *i, struct file *f)
{
return single_open(f, wiidebug_drm_show, i->i_private);
}
static ssize_t wiidebug_drm_write(struct file *f, const char __user *u,
size_t s, loff_t *off)
{
struct wiimote_debug *dbg = f->private_data;
unsigned long flags;
char buf[16];
ssize_t len;
int i;
if (s == 0)
return -EINVAL;
len = min((size_t) 15, s);
if (copy_from_user(buf, u, len))
return -EFAULT;
buf[15] = 0;
for (i = 0; i < WIIPROTO_REQ_MAX; ++i) {
if (!wiidebug_drmmap[i])
continue;
if (!strcasecmp(buf, wiidebug_drmmap[i]))
break;
}
if (i == WIIPROTO_REQ_MAX)
i = simple_strtoul(buf, NULL, 10);
spin_lock_irqsave(&dbg->wdata->state.lock, flags);
wiiproto_req_drm(dbg->wdata, (__u8) i);
spin_unlock_irqrestore(&dbg->wdata->state.lock, flags);
return len;
}
static const struct file_operations wiidebug_drm_fops = {
.owner = THIS_MODULE,
.open = wiidebug_drm_open,
.read = seq_read,
.llseek = seq_lseek,
.write = wiidebug_drm_write,
.release = single_release,
};
int wiidebug_init(struct wiimote_data *wdata)
{
struct wiimote_debug *dbg;
unsigned long flags;
int ret = -ENOMEM;
dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
if (!dbg)
@ -99,16 +188,25 @@ int wiidebug_init(struct wiimote_data *wdata)
dbg->eeprom = debugfs_create_file("eeprom", S_IRUSR,
dbg->wdata->hdev->debug_dir, dbg, &wiidebug_eeprom_fops);
if (!dbg->eeprom) {
kfree(dbg);
return -ENOMEM;
}
if (!dbg->eeprom)
goto err;
dbg->drm = debugfs_create_file("drm", S_IRUSR,
dbg->wdata->hdev->debug_dir, dbg, &wiidebug_drm_fops);
if (!dbg->drm)
goto err_drm;
spin_lock_irqsave(&wdata->state.lock, flags);
wdata->debug = dbg;
spin_unlock_irqrestore(&wdata->state.lock, flags);
return 0;
err_drm:
debugfs_remove(dbg->eeprom);
err:
kfree(dbg);
return ret;
}
void wiidebug_deinit(struct wiimote_data *wdata)
@ -123,6 +221,7 @@ void wiidebug_deinit(struct wiimote_data *wdata)
wdata->debug = NULL;
spin_unlock_irqrestore(&wdata->state.lock, flags);
debugfs_remove(dbg->drm);
debugfs_remove(dbg->eeprom);
kfree(dbg);
}

2
drivers/hid/hid-wiimote.h
View File

@ -52,6 +52,7 @@ struct wiimote_state {
spinlock_t lock;
__u8 flags;
__u8 accel_split[2];
__u8 drm;
/* synchronous cmd requests */
struct mutex sync;
@ -109,6 +110,7 @@ enum wiiproto_reqs {
WIIPROTO_REQ_DRM_E = 0x3d,
WIIPROTO_REQ_DRM_SKAI1 = 0x3e,
WIIPROTO_REQ_DRM_SKAI2 = 0x3f,
WIIPROTO_REQ_MAX
};
#define dev_to_wii(pdev) hid_get_drvdata(container_of(pdev, struct hid_device, \