HID: wiimote: Allow direct DRM debug access
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
Jiri Kosina
parent
1d3452c63d
commit
43d782ae80
3 changed files with 107 additions and 4 deletions
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@ -238,6 +238,7 @@ void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm)
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cmd[1] = 0;
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cmd[2] = drm;
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wdata->state.drm = drm;
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wiiproto_keep_rumble(wdata, &cmd[1]);
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wiimote_queue(wdata, cmd, sizeof(cmd));
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}
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@ -1141,6 +1142,7 @@ static struct wiimote_data *wiimote_create(struct hid_device *hdev)
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spin_lock_init(&wdata->state.lock);
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init_completion(&wdata->state.ready);
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mutex_init(&wdata->state.sync);
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wdata->state.drm = WIIPROTO_REQ_DRM_K;
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return wdata;
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@ -12,6 +12,7 @@
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#include <linux/debugfs.h>
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#include <linux/module.h>
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#include <linux/seq_file.h>
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#include <linux/spinlock.h>
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#include <linux/uaccess.h>
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#include "hid-wiimote.h"
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@ -19,6 +20,7 @@
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struct wiimote_debug {
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struct wiimote_data *wdata;
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struct dentry *eeprom;
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struct dentry *drm;
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};
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static int wiidebug_eeprom_open(struct inode *i, struct file *f)
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@ -86,10 +88,97 @@ static const struct file_operations wiidebug_eeprom_fops = {
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.llseek = generic_file_llseek,
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};
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static const char *wiidebug_drmmap[] = {
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[WIIPROTO_REQ_NULL] = "NULL",
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[WIIPROTO_REQ_DRM_K] = "K",
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[WIIPROTO_REQ_DRM_KA] = "KA",
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[WIIPROTO_REQ_DRM_KE] = "KE",
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[WIIPROTO_REQ_DRM_KAI] = "KAI",
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[WIIPROTO_REQ_DRM_KEE] = "KEE",
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[WIIPROTO_REQ_DRM_KAE] = "KAE",
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[WIIPROTO_REQ_DRM_KIE] = "KIE",
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[WIIPROTO_REQ_DRM_KAIE] = "KAIE",
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[WIIPROTO_REQ_DRM_E] = "E",
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[WIIPROTO_REQ_DRM_SKAI1] = "SKAI1",
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[WIIPROTO_REQ_DRM_SKAI2] = "SKAI2",
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[WIIPROTO_REQ_MAX] = NULL
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};
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static int wiidebug_drm_show(struct seq_file *f, void *p)
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{
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struct wiimote_debug *dbg = f->private;
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const char *str = NULL;
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unsigned long flags;
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__u8 drm;
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spin_lock_irqsave(&dbg->wdata->state.lock, flags);
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drm = dbg->wdata->state.drm;
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spin_unlock_irqrestore(&dbg->wdata->state.lock, flags);
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if (drm < WIIPROTO_REQ_MAX)
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str = wiidebug_drmmap[drm];
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if (!str)
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str = "unknown";
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seq_printf(f, "%s\n", str);
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return 0;
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}
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static int wiidebug_drm_open(struct inode *i, struct file *f)
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{
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return single_open(f, wiidebug_drm_show, i->i_private);
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}
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static ssize_t wiidebug_drm_write(struct file *f, const char __user *u,
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size_t s, loff_t *off)
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{
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struct wiimote_debug *dbg = f->private_data;
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unsigned long flags;
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char buf[16];
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ssize_t len;
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int i;
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if (s == 0)
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return -EINVAL;
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len = min((size_t) 15, s);
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if (copy_from_user(buf, u, len))
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return -EFAULT;
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buf[15] = 0;
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for (i = 0; i < WIIPROTO_REQ_MAX; ++i) {
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if (!wiidebug_drmmap[i])
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continue;
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if (!strcasecmp(buf, wiidebug_drmmap[i]))
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break;
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}
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if (i == WIIPROTO_REQ_MAX)
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i = simple_strtoul(buf, NULL, 10);
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spin_lock_irqsave(&dbg->wdata->state.lock, flags);
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wiiproto_req_drm(dbg->wdata, (__u8) i);
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spin_unlock_irqrestore(&dbg->wdata->state.lock, flags);
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return len;
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}
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static const struct file_operations wiidebug_drm_fops = {
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.owner = THIS_MODULE,
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.open = wiidebug_drm_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.write = wiidebug_drm_write,
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.release = single_release,
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};
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int wiidebug_init(struct wiimote_data *wdata)
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{
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struct wiimote_debug *dbg;
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unsigned long flags;
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int ret = -ENOMEM;
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dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
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if (!dbg)
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@ -99,16 +188,25 @@ int wiidebug_init(struct wiimote_data *wdata)
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dbg->eeprom = debugfs_create_file("eeprom", S_IRUSR,
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dbg->wdata->hdev->debug_dir, dbg, &wiidebug_eeprom_fops);
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if (!dbg->eeprom) {
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kfree(dbg);
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return -ENOMEM;
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}
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if (!dbg->eeprom)
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goto err;
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dbg->drm = debugfs_create_file("drm", S_IRUSR,
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dbg->wdata->hdev->debug_dir, dbg, &wiidebug_drm_fops);
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if (!dbg->drm)
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goto err_drm;
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spin_lock_irqsave(&wdata->state.lock, flags);
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wdata->debug = dbg;
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spin_unlock_irqrestore(&wdata->state.lock, flags);
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return 0;
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err_drm:
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debugfs_remove(dbg->eeprom);
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err:
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kfree(dbg);
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return ret;
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}
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void wiidebug_deinit(struct wiimote_data *wdata)
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@ -123,6 +221,7 @@ void wiidebug_deinit(struct wiimote_data *wdata)
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wdata->debug = NULL;
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spin_unlock_irqrestore(&wdata->state.lock, flags);
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debugfs_remove(dbg->drm);
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debugfs_remove(dbg->eeprom);
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kfree(dbg);
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}
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@ -52,6 +52,7 @@ struct wiimote_state {
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spinlock_t lock;
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__u8 flags;
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__u8 accel_split[2];
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__u8 drm;
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/* synchronous cmd requests */
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struct mutex sync;
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@ -109,6 +110,7 @@ enum wiiproto_reqs {
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WIIPROTO_REQ_DRM_E = 0x3d,
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WIIPROTO_REQ_DRM_SKAI1 = 0x3e,
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WIIPROTO_REQ_DRM_SKAI2 = 0x3f,
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WIIPROTO_REQ_MAX
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};
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#define dev_to_wii(pdev) hid_get_drvdata(container_of(pdev, struct hid_device, \
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