Keep track of current drm and add new debugfs file which reads or writes the
current DRM.
Signed-off-by: David Herrmann <dh.herrmann@xxxxxxxxxxxxxx>
---
drivers/hid/hid-wiimote-core.c | 2 +
drivers/hid/hid-wiimote-debug.c | 107 +++++++++++++++++++++++++++++++++++++--
drivers/hid/hid-wiimote.h | 2 +
3 files changed, 107 insertions(+), 4 deletions(-)
diff --git a/drivers/hid/hid-wiimote-core.c b/drivers/hid/hid-wiimote-core.c
index 2fd2f03..745667e 100644
--- a/drivers/hid/hid-wiimote-core.c
+++ b/drivers/hid/hid-wiimote-core.c
@@ -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;
diff --git a/drivers/hid/hid-wiimote-debug.c b/drivers/hid/hid-wiimote-debug.c
index f81243c..17dabc1 100644
--- a/drivers/hid/hid-wiimote-debug.c
+++ b/drivers/hid/hid-wiimote-debug.c
@@ -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);
}
diff --git a/drivers/hid/hid-wiimote.h b/drivers/hid/hid-wiimote.h
index 7b67657..c81dbeb 100644
--- a/drivers/hid/hid-wiimote.h
+++ b/drivers/hid/hid-wiimote.h
@@ -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, \
--
1.7.7.3
--
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