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https://github.com/edk2-porting/linux-next.git
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HID: wiimote: convert LEDS to modules
Each of the 4 LEDs may be supported individually by devices. Therefore, we need one module for each device. To avoid code-duplication, we simply pass the LED ID as "arg" argument to the module loading code. This just moves the code over to wiimote-module. The semantics stay the same as before. Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
David Herrmann
Jiri Kosina
parent
dcf3923138
commit
6c5ae01805
@ -14,7 +14,6 @@
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/input.h>
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#include <linux/leds.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/spinlock.h>
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@ -151,7 +150,7 @@ void wiiproto_req_rumble(struct wiimote_data *wdata, __u8 rumble)
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wiimote_queue(wdata, cmd, sizeof(cmd));
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}
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static void wiiproto_req_leds(struct wiimote_data *wdata, int leds)
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void wiiproto_req_leds(struct wiimote_data *wdata, int leds)
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{
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__u8 cmd[2];
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@ -529,54 +528,6 @@ unlock:
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return ret;
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}
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static enum led_brightness wiimote_leds_get(struct led_classdev *led_dev)
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{
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struct wiimote_data *wdata;
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struct device *dev = led_dev->dev->parent;
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int i;
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unsigned long flags;
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bool value = false;
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wdata = hid_get_drvdata(container_of(dev, struct hid_device, dev));
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for (i = 0; i < 4; ++i) {
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if (wdata->leds[i] == led_dev) {
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spin_lock_irqsave(&wdata->state.lock, flags);
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value = wdata->state.flags & WIIPROTO_FLAG_LED(i + 1);
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spin_unlock_irqrestore(&wdata->state.lock, flags);
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break;
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}
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}
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return value ? LED_FULL : LED_OFF;
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}
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static void wiimote_leds_set(struct led_classdev *led_dev,
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enum led_brightness value)
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{
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struct wiimote_data *wdata;
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struct device *dev = led_dev->dev->parent;
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int i;
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unsigned long flags;
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__u8 state, flag;
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wdata = hid_get_drvdata(container_of(dev, struct hid_device, dev));
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for (i = 0; i < 4; ++i) {
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if (wdata->leds[i] == led_dev) {
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flag = WIIPROTO_FLAG_LED(i + 1);
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spin_lock_irqsave(&wdata->state.lock, flags);
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state = wdata->state.flags;
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if (value == LED_OFF)
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wiiproto_req_leds(wdata, state & ~flag);
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else
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wiiproto_req_leds(wdata, state | flag);
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spin_unlock_irqrestore(&wdata->state.lock, flags);
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break;
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}
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}
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}
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static int wiimote_accel_open(struct input_dev *dev)
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{
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struct wiimote_data *wdata = input_get_drvdata(dev);
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@ -626,18 +577,30 @@ static const __u8 * const wiimote_devtype_mods[WIIMOTE_DEV_NUM] = {
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WIIMOD_KEYS,
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WIIMOD_RUMBLE,
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WIIMOD_BATTERY,
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WIIMOD_LED1,
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WIIMOD_LED2,
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WIIMOD_LED3,
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WIIMOD_LED4,
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WIIMOD_NULL,
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},
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[WIIMOTE_DEV_GEN10] = (const __u8[]){
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WIIMOD_KEYS,
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WIIMOD_RUMBLE,
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WIIMOD_BATTERY,
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WIIMOD_LED1,
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WIIMOD_LED2,
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WIIMOD_LED3,
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WIIMOD_LED4,
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WIIMOD_NULL,
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},
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[WIIMOTE_DEV_GEN20] = (const __u8[]){
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WIIMOD_KEYS,
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WIIMOD_RUMBLE,
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WIIMOD_BATTERY,
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WIIMOD_LED1,
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WIIMOD_LED2,
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WIIMOD_LED3,
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WIIMOD_LED4,
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WIIMOD_NULL,
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},
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};
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@ -1159,58 +1122,6 @@ static int wiimote_hid_event(struct hid_device *hdev, struct hid_report *report,
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return 0;
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}
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static void wiimote_leds_destroy(struct wiimote_data *wdata)
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{
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int i;
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struct led_classdev *led;
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for (i = 0; i < 4; ++i) {
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if (wdata->leds[i]) {
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led = wdata->leds[i];
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wdata->leds[i] = NULL;
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led_classdev_unregister(led);
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kfree(led);
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}
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}
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}
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static int wiimote_leds_create(struct wiimote_data *wdata)
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{
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int i, ret;
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struct device *dev = &wdata->hdev->dev;
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size_t namesz = strlen(dev_name(dev)) + 9;
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struct led_classdev *led;
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char *name;
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for (i = 0; i < 4; ++i) {
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led = kzalloc(sizeof(struct led_classdev) + namesz, GFP_KERNEL);
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if (!led) {
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ret = -ENOMEM;
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goto err;
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}
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name = (void*)&led[1];
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snprintf(name, namesz, "%s:blue:p%d", dev_name(dev), i);
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led->name = name;
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led->brightness = 0;
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led->max_brightness = 1;
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led->brightness_get = wiimote_leds_get;
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led->brightness_set = wiimote_leds_set;
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ret = led_classdev_register(dev, led);
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if (ret) {
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kfree(led);
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goto err;
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}
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wdata->leds[i] = led;
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}
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return 0;
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err:
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wiimote_leds_destroy(wdata);
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return ret;
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}
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static struct wiimote_data *wiimote_create(struct hid_device *hdev)
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{
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struct wiimote_data *wdata;
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@ -1300,7 +1211,6 @@ static void wiimote_destroy(struct wiimote_data *wdata)
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{
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wiidebug_deinit(wdata);
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wiiext_deinit(wdata);
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wiimote_leds_destroy(wdata);
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cancel_work_sync(&wdata->init_worker);
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wiimote_modules_unload(wdata);
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@ -1357,10 +1267,6 @@ static int wiimote_hid_probe(struct hid_device *hdev,
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goto err_ir;
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}
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ret = wiimote_leds_create(wdata);
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if (ret)
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goto err_free;
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ret = wiiext_init(wdata);
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if (ret)
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goto err_free;
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@ -1371,11 +1277,6 @@ static int wiimote_hid_probe(struct hid_device *hdev,
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hid_info(hdev, "New device registered\n");
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/* by default set led1 after device initialization */
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spin_lock_irq(&wdata->state.lock);
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wiiproto_req_leds(wdata, WIIPROTO_FLAG_LED1);
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spin_unlock_irq(&wdata->state.lock);
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/* schedule device detection */
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schedule_work(&wdata->init_worker);
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@ -268,10 +268,150 @@ static const struct wiimod_ops wiimod_battery = {
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.remove = wiimod_battery_remove,
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};
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/*
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* LED
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* 0 to 4 player LEDs are supported by devices. The "arg" field of the
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* wiimod_ops structure specifies which LED this module controls. This allows
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* to register a limited number of LEDs.
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* State is managed by wiimote core.
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*/
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static enum led_brightness wiimod_led_get(struct led_classdev *led_dev)
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{
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struct wiimote_data *wdata;
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struct device *dev = led_dev->dev->parent;
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int i;
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unsigned long flags;
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bool value = false;
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wdata = hid_get_drvdata(container_of(dev, struct hid_device, dev));
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for (i = 0; i < 4; ++i) {
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if (wdata->leds[i] == led_dev) {
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spin_lock_irqsave(&wdata->state.lock, flags);
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value = wdata->state.flags & WIIPROTO_FLAG_LED(i + 1);
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spin_unlock_irqrestore(&wdata->state.lock, flags);
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break;
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}
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}
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return value ? LED_FULL : LED_OFF;
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}
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static void wiimod_led_set(struct led_classdev *led_dev,
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enum led_brightness value)
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{
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struct wiimote_data *wdata;
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struct device *dev = led_dev->dev->parent;
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int i;
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unsigned long flags;
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__u8 state, flag;
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wdata = hid_get_drvdata(container_of(dev, struct hid_device, dev));
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for (i = 0; i < 4; ++i) {
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if (wdata->leds[i] == led_dev) {
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flag = WIIPROTO_FLAG_LED(i + 1);
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spin_lock_irqsave(&wdata->state.lock, flags);
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state = wdata->state.flags;
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if (value == LED_OFF)
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wiiproto_req_leds(wdata, state & ~flag);
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else
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wiiproto_req_leds(wdata, state | flag);
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spin_unlock_irqrestore(&wdata->state.lock, flags);
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break;
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}
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}
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}
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static int wiimod_led_probe(const struct wiimod_ops *ops,
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struct wiimote_data *wdata)
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{
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struct device *dev = &wdata->hdev->dev;
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size_t namesz = strlen(dev_name(dev)) + 9;
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struct led_classdev *led;
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unsigned long flags;
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char *name;
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int ret;
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led = kzalloc(sizeof(struct led_classdev) + namesz, GFP_KERNEL);
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if (!led)
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return -ENOMEM;
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name = (void*)&led[1];
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snprintf(name, namesz, "%s:blue:p%lu", dev_name(dev), ops->arg);
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led->name = name;
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led->brightness = 0;
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led->max_brightness = 1;
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led->brightness_get = wiimod_led_get;
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led->brightness_set = wiimod_led_set;
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wdata->leds[ops->arg] = led;
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ret = led_classdev_register(dev, led);
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if (ret)
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goto err_free;
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/* enable LED1 to stop initial LED-blinking */
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if (ops->arg == 0) {
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spin_lock_irqsave(&wdata->state.lock, flags);
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wiiproto_req_leds(wdata, WIIPROTO_FLAG_LED1);
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spin_unlock_irqrestore(&wdata->state.lock, flags);
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}
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return 0;
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err_free:
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wdata->leds[ops->arg] = NULL;
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kfree(led);
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return ret;
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}
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static void wiimod_led_remove(const struct wiimod_ops *ops,
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struct wiimote_data *wdata)
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{
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if (!wdata->leds[ops->arg])
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return;
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led_classdev_unregister(wdata->leds[ops->arg]);
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kfree(wdata->leds[ops->arg]);
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wdata->leds[ops->arg] = NULL;
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}
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static const struct wiimod_ops wiimod_leds[4] = {
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{
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.flags = 0,
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.arg = 0,
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.probe = wiimod_led_probe,
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.remove = wiimod_led_remove,
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},
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{
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.flags = 0,
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.arg = 1,
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.probe = wiimod_led_probe,
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.remove = wiimod_led_remove,
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},
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{
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.flags = 0,
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.arg = 2,
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.probe = wiimod_led_probe,
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.remove = wiimod_led_remove,
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},
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{
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.flags = 0,
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.arg = 3,
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.probe = wiimod_led_probe,
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.remove = wiimod_led_remove,
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},
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};
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/* module table */
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const struct wiimod_ops *wiimod_table[WIIMOD_NUM] = {
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[WIIMOD_KEYS] = &wiimod_keys,
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[WIIMOD_RUMBLE] = &wiimod_rumble,
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[WIIMOD_BATTERY] = &wiimod_battery,
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[WIIMOD_LED1] = &wiimod_leds[0],
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[WIIMOD_LED2] = &wiimod_leds[1],
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[WIIMOD_LED3] = &wiimod_leds[2],
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[WIIMOD_LED4] = &wiimod_leds[3],
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};
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@ -129,6 +129,10 @@ enum wiimod_module {
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WIIMOD_KEYS,
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WIIMOD_RUMBLE,
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WIIMOD_BATTERY,
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WIIMOD_LED1,
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WIIMOD_LED2,
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WIIMOD_LED3,
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WIIMOD_LED4,
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WIIMOD_NUM,
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WIIMOD_NULL = WIIMOD_NUM,
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};
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@ -185,6 +189,7 @@ enum wiiproto_reqs {
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extern void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm);
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extern void wiiproto_req_rumble(struct wiimote_data *wdata, __u8 rumble);
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extern void wiiproto_req_leds(struct wiimote_data *wdata, int leds);
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extern void wiiproto_req_status(struct wiimote_data *wdata);
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extern int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,
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const __u8 *wmem, __u8 size);
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