HID: driver for PS2/3 Buzz controllers

This patch adds support for PS2/3 Buzz controllers into hid-sony

It has been tested on Debian 7 with kernel version 3.10.0-rc2. Unfortunately
I can't test the patch with a regular six-axis controller myself.

Signed-off-by: Colin Leitner <colin.leitner@gmail.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: linux-input@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 301 insertions, 9 deletions

diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index 312098e4af4f..41e829c8bc48 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -6,6 +6,7 @@
  *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
  *  Copyright (c) 2008 Jiri Slaby
  *  Copyright (c) 2006-2008 Jiri Kosina
+ *  Copyright (c) 2013 Colin Leitner <colin.leitner@gmail.com>
  */
 
 /*
@@ -26,6 +27,7 @@
 #define VAIO_RDESC_CONSTANT     (1 << 0)
 #define SIXAXIS_CONTROLLER_USB  (1 << 1)
 #define SIXAXIS_CONTROLLER_BT   (1 << 2)
+#define BUZZ_CONTROLLER         (1 << 3)
 
 static const u8 sixaxis_rdesc_fixup[] = {
         0x95, 0x13, 0x09, 0x01, 0x81, 0x02, 0x95, 0x0C,
@@ -55,8 +57,56 @@ static const u8 sixaxis_rdesc_fixup2[] = {
         0xb1, 0x02, 0xc0, 0xc0,
 };
 
+static const unsigned int buzz_keymap[] = {
+        /* The controller has 4 remote buzzers, each with one LED and 5
+         * buttons.
+         * 
+         * We use the mapping chosen by the controller, which is:
+         *
+         * Key          Offset
+         * -------------------
+         * Buzz              1
+         * Blue              5
+         * Orange            4
+         * Green             3
+         * Yellow            2
+         *
+         * So, for example, the orange button on the third buzzer is mapped to
+         * BTN_TRIGGER_HAPPY14
+         */
+        [ 1] = BTN_TRIGGER_HAPPY1,
+        [ 2] = BTN_TRIGGER_HAPPY2,
+        [ 3] = BTN_TRIGGER_HAPPY3,
+        [ 4] = BTN_TRIGGER_HAPPY4,
+        [ 5] = BTN_TRIGGER_HAPPY5,
+        [ 6] = BTN_TRIGGER_HAPPY6,
+        [ 7] = BTN_TRIGGER_HAPPY7,
+        [ 8] = BTN_TRIGGER_HAPPY8,
+        [ 9] = BTN_TRIGGER_HAPPY9,
+        [10] = BTN_TRIGGER_HAPPY10,
+        [11] = BTN_TRIGGER_HAPPY11,
+        [12] = BTN_TRIGGER_HAPPY12,
+        [13] = BTN_TRIGGER_HAPPY13,
+        [14] = BTN_TRIGGER_HAPPY14,
+        [15] = BTN_TRIGGER_HAPPY15,
+        [16] = BTN_TRIGGER_HAPPY16,
+        [17] = BTN_TRIGGER_HAPPY17,
+        [18] = BTN_TRIGGER_HAPPY18,
+        [19] = BTN_TRIGGER_HAPPY19,
+        [20] = BTN_TRIGGER_HAPPY20,
+};
+
 struct sony_sc {
         unsigned long quirks;
+
+        void *extra;
+};
+
+struct buzz_extra {
+#ifdef CONFIG_LEDS_CLASS
+        int led_state;
+        struct led_classdev *leds[4];
+#endif
 };
 
 /* Sony Vaio VGX has wrongly mouse pointer declared as constant */
@@ -117,6 +167,38 @@ static int sony_raw_event(struct hid_device *hdev, struct hid_report *report,
         return 0;
 }
 
+static int sony_mapping(struct hid_device *hdev, struct hid_input *hi,
+                        struct hid_field *field, struct hid_usage *usage,
+                        unsigned long **bit, int *max)
+{
+        struct sony_sc *sc = hid_get_drvdata(hdev);
+
+        if (sc->quirks & BUZZ_CONTROLLER) {
+                unsigned int key = usage->hid & HID_USAGE;
+
+                if ((usage->hid & HID_USAGE_PAGE) != HID_UP_BUTTON)
+                        return -1;
+
+                switch (usage->collection_index) {
+                case 1:
+                        if (key >= ARRAY_SIZE(buzz_keymap))
+                                return -1;
+
+                        key = buzz_keymap[key];
+                        if (!key)
+                                return -1;
+                        break;
+                default:
+                        return -1;
+                }
+
+                hid_map_usage_clear(hi, usage, bit, max, EV_KEY, key);
+                return 1;
+        }
+
+        return -1;
+}
+
 /*
  * The Sony Sixaxis does not handle HID Output Reports on the Interrupt EP
  * like it should according to usbhid/hid-core.c::usbhid_output_raw_report()
@@ -192,11 +274,201 @@ static int sixaxis_set_operational_bt(struct hid_device *hdev)
         return hdev->hid_output_raw_report(hdev, buf, sizeof(buf), HID_FEATURE_REPORT);
 }
 
+#ifdef CONFIG_LEDS_CLASS
+static void buzz_set_leds(struct hid_device *hdev, int leds)
+{
+        struct list_head *report_list =
+                &hdev->report_enum[HID_OUTPUT_REPORT].report_list;
+        struct hid_report *report = list_entry(report_list->next,
+                struct hid_report, list);
+        __s32 *value = report->field[0]->value;
+
+        value[0] = 0x00;
+        value[1] = (leds & 1) ? 0xff : 0x00;
+        value[2] = (leds & 2) ? 0xff : 0x00;
+        value[3] = (leds & 4) ? 0xff : 0x00;
+        value[4] = (leds & 8) ? 0xff : 0x00;
+        value[5] = 0x00;
+        value[6] = 0x00;
+        hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
+}
+
+static void buzz_led_set_brightness(struct led_classdev *led,
+                                    enum led_brightness value)
+{
+        struct device *dev = led->dev->parent;
+        struct hid_device *hdev = container_of(dev, struct hid_device, dev);
+        struct sony_sc *drv_data;
+        struct buzz_extra *buzz;
+
+        int n;
+
+        drv_data = hid_get_drvdata(hdev);
+        if (!drv_data || !drv_data->extra) {
+                hid_err(hdev, "No device data\n");
+                return;
+        }
+        buzz = drv_data->extra;
+
+        for (n = 0; n < 4; n++) {
+                if (led == buzz->leds[n]) {
+                        int on = !! (buzz->led_state & (1 << n));
+                        if (value == LED_OFF && on) {
+                                buzz->led_state &= ~(1 << n);
+                                buzz_set_leds(hdev, buzz->led_state);
+                        } else if (value != LED_OFF && !on) {
+                                buzz->led_state |= (1 << n);
+                                buzz_set_leds(hdev, buzz->led_state);
+                        }
+                        break;
+                }
+        }
+}
+
+static enum led_brightness buzz_led_get_brightness(struct led_classdev *led)
+{
+        struct device *dev = led->dev->parent;
+        struct hid_device *hdev = container_of(dev, struct hid_device, dev);
+        struct sony_sc *drv_data;
+        struct buzz_extra *buzz;
+
+        int n;
+        int on = 0;
+
+        drv_data = hid_get_drvdata(hdev);
+        if (!drv_data || !drv_data->extra) {
+                hid_err(hdev, "No device data\n");
+                return LED_OFF;
+        }
+        buzz = drv_data->extra;
+
+        for (n = 0; n < 4; n++) {
+                if (led == buzz->leds[n]) {
+                        on = !! (buzz->led_state & (1 << n));
+                        break;
+                }
+        }
+
+        return on ? LED_FULL : LED_OFF;
+}
+#endif
+
+static int buzz_init(struct hid_device *hdev)
+{
+        struct sony_sc *drv_data;
+        struct buzz_extra *buzz;
+        int ret = 0;
+
+        drv_data = hid_get_drvdata(hdev);
+        BUG_ON(!(drv_data->quirks & BUZZ_CONTROLLER));
+
+        buzz = kzalloc(sizeof(*buzz), GFP_KERNEL);
+        if (!buzz) {
+                hid_err(hdev, "Insufficient memory, cannot allocate driver data\n");
+                return -ENOMEM;
+        }
+        drv_data->extra = buzz;
+
+        /* Clear LEDs as we have no way of reading their initial state. This is
+         * only relevant if the driver is loaded after somebody actively set the
+         * LEDs to on */
+        buzz_set_leds(hdev, 0x00);
+
+#ifdef CONFIG_LEDS_CLASS
+        {
+                int n;
+                struct led_classdev *led;
+                size_t name_sz;
+                char *name;
+
+                name_sz = strlen(dev_name(&hdev->dev)) + strlen("::buzz#") + 1;
+
+                for (n = 0; n < 4; n++) {
+                        led = kzalloc(sizeof(struct led_classdev) + name_sz, GFP_KERNEL);
+                        if (!led) {
+                                hid_err(hdev, "Couldn't allocate memory for LED %d\n", n);
+                                goto error_leds;
+                        }
+
+                        name = (void *)(&led[1]);
+                        snprintf(name, name_sz, "%s::buzz%d", dev_name(&hdev->dev), n + 1);
+                        led->name = name;
+                        led->brightness = 0;
+                        led->max_brightness = 1;
+                        led->brightness_get = buzz_led_get_brightness;
+                        led->brightness_set = buzz_led_set_brightness;
+
+                        if (led_classdev_register(&hdev->dev, led)) {
+                                hid_err(hdev, "Failed to register LED %d\n", n);
+                                kfree(led);
+                                goto error_leds;
+                        }
+
+                        buzz->leds[n] = led;
+                }
+        }
+#endif
+
+        return ret;
+
+#ifdef CONFIG_LEDS_CLASS
+error_leds:
+        {
+                int n;
+                struct led_classdev *led;
+
+                for (n = 0; n < 4; n++) {
+                        led = buzz->leds[n];
+                        buzz->leds[n] = NULL;
+                        if (!led)
+                                continue;
+                        led_classdev_unregister(led);
+                        kfree(led);
+                }
+        }
+
+        kfree(drv_data->extra);
+        drv_data->extra = NULL;
+        return ret;
+#endif
+}
+
+static void buzz_remove(struct hid_device *hdev)
+{
+        struct sony_sc *drv_data;
+        struct buzz_extra *buzz;
+
+        drv_data = hid_get_drvdata(hdev);
+        BUG_ON(!(drv_data->quirks & BUZZ_CONTROLLER));
+
+        buzz = drv_data->extra;
+        
+#ifdef CONFIG_LEDS_CLASS
+        {
+                int n;
+                struct led_classdev *led;
+
+                for (n = 0; n < 4; n++) {
+                        led = buzz->leds[n];
+                        buzz->leds[n] = NULL;
+                        if (!led)
+                                continue;
+                        led_classdev_unregister(led);
+                        kfree(led);
+                }
+        }
+#endif
+
+        kfree(drv_data->extra);
+        drv_data->extra = NULL;
+}
+
 static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id)
 {
         int ret;
         unsigned long quirks = id->driver_data;
         struct sony_sc *sc;
+        unsigned int connect_mask = HID_CONNECT_DEFAULT;
 
         sc = kzalloc(sizeof(*sc), GFP_KERNEL);
         if (sc == NULL) {
@@ -213,8 +485,14 @@ static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id)
                 goto err_free;
         }
 
-        ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT |
-                        HID_CONNECT_HIDDEV_FORCE);
+        if (sc->quirks & VAIO_RDESC_CONSTANT)
+                connect_mask |= HID_CONNECT_HIDDEV_FORCE;
+        else if (sc->quirks & SIXAXIS_CONTROLLER_USB)
+                connect_mask |= HID_CONNECT_HIDDEV_FORCE;
+        else if (sc->quirks & SIXAXIS_CONTROLLER_BT)
+                connect_mask |= HID_CONNECT_HIDDEV_FORCE;
+
+        ret = hid_hw_start(hdev, connect_mask);
         if (ret) {
                 hid_err(hdev, "hw start failed\n");
                 goto err_free;
@@ -226,6 +504,8 @@ static int sony_probe(struct hid_device *hdev, const struct hid_device_id *id)
         }
         else if (sc->quirks & SIXAXIS_CONTROLLER_BT)
                 ret = sixaxis_set_operational_bt(hdev);
+        else if (sc->quirks & BUZZ_CONTROLLER)
+                ret = buzz_init(hdev);
         else
                 ret = 0;
 
@@ -242,8 +522,13 @@ err_free:
 
 static void sony_remove(struct hid_device *hdev)
 {
+        struct sony_sc *sc = hid_get_drvdata(hdev);
+
+        if (sc->quirks & BUZZ_CONTROLLER)
+                buzz_remove(hdev);
+
         hid_hw_stop(hdev);
-        kfree(hid_get_drvdata(hdev));
+        kfree(sc);
 }
 
 static const struct hid_device_id sony_devices[] = {
@@ -257,17 +542,24 @@ static const struct hid_device_id sony_devices[] = {
                 .driver_data = VAIO_RDESC_CONSTANT },
         { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_VAIO_VGP_MOUSE),
                 .driver_data = VAIO_RDESC_CONSTANT },
+        /* Wired Buzz Controller. Reported as Sony Hub from its USB ID and as
+         * Logitech joystick from the device descriptor. */
+        { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_BUZZ_CONTROLLER),
+                .driver_data = BUZZ_CONTROLLER },
+        { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_WIRELESS_BUZZ_CONTROLLER),
+                .driver_data = BUZZ_CONTROLLER },
         { }
 };
 MODULE_DEVICE_TABLE(hid, sony_devices);
 
 static struct hid_driver sony_driver = {
-        .name = "sony",
-        .id_table = sony_devices,
-        .probe = sony_probe,
-        .remove = sony_remove,
-        .report_fixup = sony_report_fixup,
-        .raw_event = sony_raw_event
+        .name          = "sony",
+        .id_table      = sony_devices,
+        .input_mapping = sony_mapping,
+        .probe         = sony_probe,
+        .remove        = sony_remove,
+        .report_fixup  = sony_report_fixup,
+        .raw_event     = sony_raw_event
 };
 module_hid_driver(sony_driver);