[ALSA] caiaq - misc input handling fixes

 - link input device with its parent so that it placed in proper spot
   in sysfs hierarchy
 - drivers that allow changing their keymaps should use private copy
   of the keymap so that one instance of a device does not affect
   another instance
 - it is preferred for drivers to properly set up input_dev->phys to
   help userspace locate devices
 - drivers should use usb_to_input_id(), or perform endianess conversion,
   themselves, otherwise ID is not correct on big-endian boxes
 - whitespace and formatting cleanup
Acked-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/sound/usb/caiaq/caiaq-device.h b/sound/usb/caiaq/caiaq-device.h
index 79bc5be..6857612 100644 (file)
--- a/sound/usb/caiaq/caiaq-device.h
+++ b/sound/usb/caiaq/caiaq-device.h
@@ -7,7 +7,7 @@
 
 #define USB_PID_RIGKONTROL2    0x1969
 #define USB_PID_RIGKONTROL3    0x1940
-#define USB_PID_KORECONTROLLER         0x4711
+#define USB_PID_KORECONTROLLER 0x4711
 #define USB_PID_AK1            0x0815
 #define USB_PID_AUDIO8DJ       0x1978
 
@@ -62,7 +62,7 @@ struct snd_usb_caiaqdev {
        struct urb **data_urbs_in;
        struct urb **data_urbs_out;
        struct snd_usb_caiaq_cb_info *data_cb_info;
-       
+
        unsigned char ep1_in_buf[EP1_BUFSIZE];
        unsigned char ep1_out_buf[EP1_BUFSIZE];
        unsigned char midi_out_buf[EP1_BUFSIZE];
@@ -72,7 +72,7 @@ struct snd_usb_caiaqdev {
        wait_queue_head_t ep1_wait_queue;
        wait_queue_head_t prepare_wait_queue;
        int spec_received, audio_parm_answer;
-       
+
        char vendor_name[CAIAQ_USB_STR_LEN];
        char product_name[CAIAQ_USB_STR_LEN];
        char serial[CAIAQ_USB_STR_LEN];
@@ -93,8 +93,10 @@ struct snd_usb_caiaqdev {
        /* Linux input */
 #ifdef CONFIG_SND_USB_CAIAQ_INPUT
        struct input_dev *input_dev;
+       char phys[64];                  /* physical device path */
+       unsigned short keycode[10];
 #endif
-       
+
        /* ALSA */
        struct snd_pcm *pcm;
        struct snd_pcm_hardware pcm_info;

diff --git a/sound/usb/caiaq/caiaq-input.c b/sound/usb/caiaq/caiaq-input.c
index cd536ca..03bf4c6 100644 (file)
--- a/sound/usb/caiaq/caiaq-input.c
+++ b/sound/usb/caiaq/caiaq-input.c
@@ -21,6 +21,7 @@
 #include <linux/moduleparam.h>
 #include <linux/input.h>
 #include <linux/usb.h>
+#include <linux/usb/input.h>
 #include <linux/spinlock.h>
 #include <sound/driver.h>
 #include <sound/core.h>
@@ -31,18 +32,18 @@
 
 #ifdef CONFIG_SND_USB_CAIAQ_INPUT
 
-static unsigned char keycode_ak1[] =  { KEY_C, KEY_B, KEY_A };
-static unsigned char keycode_rk2[] =  { KEY_1, KEY_2, KEY_3, KEY_4, 
-                                       KEY_5, KEY_6, KEY_7 };
-static unsigned char keycode_rk3[] =  { KEY_1, KEY_2, KEY_3, KEY_4,
-                                       KEY_5, KEY_6, KEY_7, KEY_5, KEY_6 };
+static unsigned short keycode_ak1[] =  { KEY_C, KEY_B, KEY_A };
+static unsigned short keycode_rk2[] =  { KEY_1, KEY_2, KEY_3, KEY_4,
+                                        KEY_5, KEY_6, KEY_7 };
+static unsigned short keycode_rk3[] =  { KEY_1, KEY_2, KEY_3, KEY_4,
+                                        KEY_5, KEY_6, KEY_7, KEY_5, KEY_6 };
 
-#define DEG90  (range/2)
-#define DEG180 (range)
-#define DEG270 (DEG90 + DEG180)
-#define DEG360 (DEG180 * 2)
-#define HIGH_PEAK (268)
-#define LOW_PEAK (-7)
+#define DEG90          (range / 2)
+#define DEG180         (range)
+#define DEG270         (DEG90 + DEG180)
+#define DEG360         (DEG180 * 2)
+#define HIGH_PEAK      (268)
+#define LOW_PEAK       (-7)
 
 /* some of these devices have endless rotation potentiometers
  * built in which use two tapers, 90 degrees phase shifted.
@@ -56,8 +57,8 @@ static unsigned int decode_erp(unsigned char a, unsigned char b)
        int range = HIGH_PEAK - LOW_PEAK;
        int mid_value = (HIGH_PEAK + LOW_PEAK) / 2;
 
-       weight_b = abs(mid_value-a) - (range/2 - 100)/2;
-       
+       weight_b = abs(mid_value - a) - (range / 2 - 100) / 2;
+
        if (weight_b < 0)
                weight_b = 0;
 
@@ -93,7 +94,7 @@ static unsigned int decode_erp(unsigned char a, unsigned char b)
 
        if (ret < 0)
                ret += 1000;
-       
+
        if (ret >= 1000)
                ret -= 1000;
 
@@ -108,76 +109,80 @@ static unsigned int decode_erp(unsigned char a, unsigned char b)
 #undef LOW_PEAK
 
 
-static void snd_caiaq_input_read_analog(struct snd_usb_caiaqdev *dev, 
+static void snd_caiaq_input_read_analog(struct snd_usb_caiaqdev *dev,
                                        const unsigned char *buf,
                                        unsigned int len)
 {
-       switch(dev->input_dev->id.product) {
+       struct input_dev *input_dev = dev->input_dev;
+
+       switch (input_dev->id.product) {
        case USB_PID_RIGKONTROL2:
-               input_report_abs(dev->input_dev, ABS_X, (buf[4] << 8) |buf[5]);
-               input_report_abs(dev->input_dev, ABS_Y, (buf[0] << 8) |buf[1]);
-               input_report_abs(dev->input_dev, ABS_Z, (buf[2] << 8) |buf[3]);
-               input_sync(dev->input_dev);
+               input_report_abs(input_dev, ABS_X, (buf[4] << 8) | buf[5]);
+               input_report_abs(input_dev, ABS_Y, (buf[0] << 8) | buf[1]);
+               input_report_abs(input_dev, ABS_Z, (buf[2] << 8) | buf[3]);
+               input_sync(input_dev);
                break;
        case USB_PID_RIGKONTROL3:
-               input_report_abs(dev->input_dev, ABS_X, (buf[0] << 8) |buf[1]);
-               input_report_abs(dev->input_dev, ABS_Y, (buf[2] << 8) |buf[3]);
-               input_report_abs(dev->input_dev, ABS_Z, (buf[4] << 8) |buf[5]);
-               input_sync(dev->input_dev);
+               input_report_abs(input_dev, ABS_X, (buf[0] << 8) | buf[1]);
+               input_report_abs(input_dev, ABS_Y, (buf[2] << 8) | buf[3]);
+               input_report_abs(input_dev, ABS_Z, (buf[4] << 8) | buf[5]);
+               input_sync(input_dev);
                break;
        }
 }
 
-static void snd_caiaq_input_read_erp(struct snd_usb_caiaqdev *dev, 
+static void snd_caiaq_input_read_erp(struct snd_usb_caiaqdev *dev,
                                     const char *buf, unsigned int len)
 {
+       struct input_dev *input_dev = dev->input_dev;
        int i;
 
-       switch(dev->input_dev->id.product) {
+       switch (input_dev->id.product) {
        case USB_PID_AK1:
                i = decode_erp(buf[0], buf[1]);
-               input_report_abs(dev->input_dev, ABS_X, i);
-               input_sync(dev->input_dev);
+               input_report_abs(input_dev, ABS_X, i);
+               input_sync(input_dev);
                break;
        }
 }
 
-static void snd_caiaq_input_read_io(struct snd_usb_caiaqdev *dev, 
+static void snd_caiaq_input_read_io(struct snd_usb_caiaqdev *dev,
                                    char *buf, unsigned int len)
 {
+       struct input_dev *input_dev = dev->input_dev;
+       unsigned short *keycode = input_dev->keycode;
        int i;
-       unsigned char *keycode = dev->input_dev->keycode;
 
        if (!keycode)
                return;
 
-       if (dev->input_dev->id.product == USB_PID_RIGKONTROL2)
-               for (i=0; i<len; i++)
+       if (input_dev->id.product == USB_PID_RIGKONTROL2)
+               for (i = 0; i < len; i++)
                        buf[i] = ~buf[i];
 
-       for (i=0; (i<dev->input_dev->keycodemax) && (i < len); i++)
-               input_report_key(dev->input_dev, keycode[i], 
-                                       buf[i/8] & (1 << (i%8)));
+       for (i = 0; i < input_dev->keycodemax && i < len; i++)
+               input_report_key(input_dev, keycode[i],
+                                buf[i / 8] & (1 << (i % 8)));
 
-       input_sync(dev->input_dev);
+       input_sync(input_dev);
 }
 
-void snd_usb_caiaq_input_dispatch(struct snd_usb_caiaqdev *dev, 
-                                 char *buf, 
+void snd_usb_caiaq_input_dispatch(struct snd_usb_caiaqdev *dev,
+                                 char *buf,
                                  unsigned int len)
 {
-       if (!dev->input_dev || (len < 1))
+       if (!dev->input_dev || len < 1)
                return;
 
        switch (buf[0]) {
        case EP1_CMD_READ_ANALOG:
-               snd_caiaq_input_read_analog(dev, buf+1, len-1);
+               snd_caiaq_input_read_analog(dev, buf + 1, len - 1);
                break;
        case EP1_CMD_READ_ERP:
-               snd_caiaq_input_read_erp(dev, buf+1, len-1);
+               snd_caiaq_input_read_erp(dev, buf + 1, len - 1);
                break;
        case EP1_CMD_READ_IO:
-               snd_caiaq_input_read_io(dev, buf+1, len-1);
+               snd_caiaq_input_read_io(dev, buf + 1, len - 1);
                break;
        }
 }
@@ -192,37 +197,34 @@ int snd_usb_caiaq_input_init(struct snd_usb_caiaqdev *dev)
        if (!input)
                return -ENOMEM;
 
+       usb_make_path(usb_dev, dev->phys, sizeof(dev->phys));
+       strlcat(dev->phys, "/input0", sizeof(dev->phys));
+
        input->name = dev->product_name;
-       input->id.bustype = BUS_USB;
-       input->id.vendor  = usb_dev->descriptor.idVendor;
-       input->id.product = usb_dev->descriptor.idProduct;
-       input->id.version = usb_dev->descriptor.bcdDevice;
+       input->phys = dev->phys;
+       usb_to_input_id(usb_dev, &input->id);
+       input->dev.parent = &usb_dev->dev;
 
         switch (dev->chip.usb_id) {
        case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL2):
                input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
                input->absbit[0] = BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) |
                        BIT_MASK(ABS_Z);
-               input->keycode = keycode_rk2;
-               input->keycodesize = sizeof(char);
+               BUILD_BUG_ON(sizeof(dev->keycode) < sizeof(keycode_rk2));
+               memcpy(dev->keycode, keycode_rk2, sizeof(keycode_rk2));
                input->keycodemax = ARRAY_SIZE(keycode_rk2);
-               for (i=0; i<ARRAY_SIZE(keycode_rk2); i++)
-                       set_bit(keycode_rk2[i], input->keybit);
-
                input_set_abs_params(input, ABS_X, 0, 4096, 0, 10);
                input_set_abs_params(input, ABS_Y, 0, 4096, 0, 10);
                input_set_abs_params(input, ABS_Z, 0, 4096, 0, 10);
                snd_usb_caiaq_set_auto_msg(dev, 1, 10, 0);
                break;
+
        case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
                input->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
                input->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_Z);
-               input->keycode = keycode_rk3;
-               input->keycodesize = sizeof(char);
+               BUILD_BUG_ON(sizeof(dev->keycode) < sizeof(keycode_rk3));
+               memcpy(dev->keycode, keycode_rk3, sizeof(keycode_rk3));
                input->keycodemax = ARRAY_SIZE(keycode_rk3);
-               for (i=0; i<ARRAY_SIZE(keycode_rk3); i++)
-                       set_bit(keycode_rk3[i], input->keybit);
-
                input_set_abs_params(input, ABS_X, 0, 1024, 0, 10);
                input_set_abs_params(input, ABS_Y, 0, 1024, 0, 10);
                input_set_abs_params(input, ABS_Z, 0, 1024, 0, 10);
@@ -231,12 +233,9 @@ int snd_usb_caiaq_input_init(struct snd_usb_caiaqdev *dev)
        case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
                input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
                input->absbit[0] = BIT_MASK(ABS_X);
-               input->keycode = keycode_ak1;
-               input->keycodesize = sizeof(char);
+               BUILD_BUG_ON(sizeof(dev->keycode) < sizeof(keycode_ak1));
+               memcpy(dev->keycode, keycode_ak1, sizeof(keycode_ak1));
                input->keycodemax = ARRAY_SIZE(keycode_ak1);
-               for (i=0; i<ARRAY_SIZE(keycode_ak1); i++)
-                       set_bit(keycode_ak1[i], input->keybit);
-
                input_set_abs_params(input, ABS_X, 0, 999, 0, 10);
                snd_usb_caiaq_set_auto_msg(dev, 1, 0, 5);
                break;
@@ -246,6 +245,11 @@ int snd_usb_caiaq_input_init(struct snd_usb_caiaqdev *dev)
                return 0;
        }
 
+       input->keycode = dev->keycode;
+       input->keycodesize = sizeof(unsigned short);
+       for (i = 0; i < input->keycodemax; i++)
+               __set_bit(dev->keycode[i], input->keybit);
+
        ret = input_register_device(input);
        if (ret < 0) {
                input_free_device(input);