V4L/DVB: wm8739: convert to the new control framework

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 62 insertions, 117 deletions

diff --git a/drivers/media/video/wm8739.c b/drivers/media/video/wm8739.c
index a11b99b4226b..d5965543ecab 100644
--- a/drivers/media/video/wm8739.c
+++ b/drivers/media/video/wm8739.c
@@ -27,11 +27,11 @@
 #include <linux/ioctl.h>
 #include <asm/uaccess.h>
 #include <linux/i2c.h>
-#include <linux/i2c-id.h>
 #include <linux/videodev2.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-chip-ident.h>
 #include <media/v4l2-i2c-drv.h>
+#include <media/v4l2-ctrls.h>
 
 MODULE_DESCRIPTION("wm8739 driver");
 MODULE_AUTHOR("T. Adachi, Hans Verkuil");
@@ -54,12 +54,14 @@ enum {
 
 struct wm8739_state {
         struct v4l2_subdev sd;
+        struct v4l2_ctrl_handler hdl;
+        struct {
+                /* audio cluster */
+                struct v4l2_ctrl *volume;
+                struct v4l2_ctrl *mute;
+                struct v4l2_ctrl *balance;
+        };
         u32 clock_freq;
-        u8 muted;
-        u16 volume;
-        u16 balance;
-        u8 vol_l;               /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
-        u8 vol_r;               /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
 };
 
 static inline struct wm8739_state *to_state(struct v4l2_subdev *sd)
@@ -67,6 +69,11 @@ static inline struct wm8739_state *to_state(struct v4l2_subdev *sd)
         return container_of(sd, struct wm8739_state, sd);
 }
 
+static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
+{
+        return &container_of(ctrl->handler, struct wm8739_state, hdl)->sd;
+}
+
 /* ------------------------------------------------------------------------ */
 
 static int wm8739_write(struct v4l2_subdev *sd, int reg, u16 val)
@@ -89,58 +96,17 @@ static int wm8739_write(struct v4l2_subdev *sd, int reg, u16 val)
         return -1;
 }
 
-/* write regs to set audio volume etc */
-static void wm8739_set_audio(struct v4l2_subdev *sd)
-{
-        struct wm8739_state *state = to_state(sd);
-        u16 mute = state->muted ? 0x80 : 0;
-
-        /* Volume setting: bits 0-4, 0x1f = 12 dB, 0x00 = -34.5 dB
-         * Default setting: 0x17 = 0 dB
-         */
-        wm8739_write(sd, R0, (state->vol_l & 0x1f) | mute);
-        wm8739_write(sd, R1, (state->vol_r & 0x1f) | mute);
-}
-
-static int wm8739_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
-{
-        struct wm8739_state *state = to_state(sd);
-
-        switch (ctrl->id) {
-        case V4L2_CID_AUDIO_MUTE:
-                ctrl->value = state->muted;
-                break;
-
-        case V4L2_CID_AUDIO_VOLUME:
-                ctrl->value = state->volume;
-                break;
-
-        case V4L2_CID_AUDIO_BALANCE:
-                ctrl->value = state->balance;
-                break;
-
-        default:
-                return -EINVAL;
-        }
-        return 0;
-}
-
-static int wm8739_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+static int wm8739_s_ctrl(struct v4l2_ctrl *ctrl)
 {
+        struct v4l2_subdev *sd = to_sd(ctrl);
         struct wm8739_state *state = to_state(sd);
         unsigned int work_l, work_r;
+        u8 vol_l;       /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
+        u8 vol_r;       /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
+        u16 mute;
 
         switch (ctrl->id) {
-        case V4L2_CID_AUDIO_MUTE:
-                state->muted = ctrl->value;
-                break;
-
         case V4L2_CID_AUDIO_VOLUME:
-                state->volume = ctrl->value;
-                break;
-
-        case V4L2_CID_AUDIO_BALANCE:
-                state->balance = ctrl->value;
                 break;
 
         default:
@@ -148,52 +114,25 @@ static int wm8739_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
         }
 
         /* normalize ( 65535 to 0 -> 31 to 0 (12dB to -34.5dB) ) */
-        work_l = (min(65536 - state->balance, 32768) * state->volume) / 32768;
-        work_r = (min(state->balance, (u16)32768) * state->volume) / 32768;
+        work_l = (min(65536 - state->balance->val, 32768) * state->volume->val) / 32768;
+        work_r = (min(state->balance->val, 32768) * state->volume->val) / 32768;
 
-        state->vol_l = (long)work_l * 31 / 65535;
-        state->vol_r = (long)work_r * 31 / 65535;
+        vol_l = (long)work_l * 31 / 65535;
+        vol_r = (long)work_r * 31 / 65535;
 
         /* set audio volume etc. */
-        wm8739_set_audio(sd);
+        mute = state->mute->val ? 0x80 : 0;
+
+        /* Volume setting: bits 0-4, 0x1f = 12 dB, 0x00 = -34.5 dB
+         * Default setting: 0x17 = 0 dB
+         */
+        wm8739_write(sd, R0, (vol_l & 0x1f) | mute);
+        wm8739_write(sd, R1, (vol_r & 0x1f) | mute);
         return 0;
 }
 
 /* ------------------------------------------------------------------------ */
 
-static struct v4l2_queryctrl wm8739_qctrl[] = {
-        {
-                .id            = V4L2_CID_AUDIO_VOLUME,
-                .name          = "Volume",
-                .minimum       = 0,
-                .maximum       = 65535,
-                .step          = 65535/100,
-                .default_value = 58880,
-                .flags         = 0,
-                .type          = V4L2_CTRL_TYPE_INTEGER,
-        }, {
-                .id            = V4L2_CID_AUDIO_MUTE,
-                .name          = "Mute",
-                .minimum       = 0,
-                .maximum       = 1,
-                .step          = 1,
-                .default_value = 1,
-                .flags         = 0,
-                .type          = V4L2_CTRL_TYPE_BOOLEAN,
-        }, {
-                .id            = V4L2_CID_AUDIO_BALANCE,
-                .name          = "Balance",
-                .minimum       = 0,
-                .maximum       = 65535,
-                .step          = 65535/100,
-                .default_value = 32768,
-                .flags         = 0,
-                .type          = V4L2_CTRL_TYPE_INTEGER,
-        }
-};
-
-/* ------------------------------------------------------------------------ */
-
 static int wm8739_s_clock_freq(struct v4l2_subdev *sd, u32 audiofreq)
 {
         struct wm8739_state *state = to_state(sd);
@@ -222,18 +161,6 @@ static int wm8739_s_clock_freq(struct v4l2_subdev *sd, u32 audiofreq)
         return 0;
 }
 
-static int wm8739_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
-{
-        int i;
-
-        for (i = 0; i < ARRAY_SIZE(wm8739_qctrl); i++)
-                if (qc->id && qc->id == wm8739_qctrl[i].id) {
-                        memcpy(qc, &wm8739_qctrl[i], sizeof(*qc));
-                        return 0;
-                }
-        return -EINVAL;
-}
-
 static int wm8739_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 {
         struct i2c_client *client = v4l2_get_subdevdata(sd);
@@ -246,21 +173,26 @@ static int wm8739_log_status(struct v4l2_subdev *sd)
         struct wm8739_state *state = to_state(sd);
 
         v4l2_info(sd, "Frequency: %u Hz\n", state->clock_freq);
-        v4l2_info(sd, "Volume L:  %02x%s\n", state->vol_l & 0x1f,
-                        state->muted ? " (muted)" : "");
-        v4l2_info(sd, "Volume R:  %02x%s\n", state->vol_r & 0x1f,
-                        state->muted ? " (muted)" : "");
+        v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
         return 0;
 }
 
 /* ----------------------------------------------------------------------- */
 
+static const struct v4l2_ctrl_ops wm8739_ctrl_ops = {
+        .s_ctrl = wm8739_s_ctrl,
+};
+
 static const struct v4l2_subdev_core_ops wm8739_core_ops = {
         .log_status = wm8739_log_status,
         .g_chip_ident = wm8739_g_chip_ident,
-        .queryctrl = wm8739_queryctrl,
-        .g_ctrl = wm8739_g_ctrl,
-        .s_ctrl = wm8739_s_ctrl,
+        .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
+        .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
+        .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
+        .g_ctrl = v4l2_subdev_g_ctrl,
+        .s_ctrl = v4l2_subdev_s_ctrl,
+        .queryctrl = v4l2_subdev_queryctrl,
+        .querymenu = v4l2_subdev_querymenu,
 };
 
 static const struct v4l2_subdev_audio_ops wm8739_audio_ops = {
@@ -289,17 +221,28 @@ static int wm8739_probe(struct i2c_client *client,
         v4l_info(client, "chip found @ 0x%x (%s)\n",
                         client->addr << 1, client->adapter->name);
 
-        state = kmalloc(sizeof(struct wm8739_state), GFP_KERNEL);
+        state = kzalloc(sizeof(struct wm8739_state), GFP_KERNEL);
         if (state == NULL)
                 return -ENOMEM;
         sd = &state->sd;
         v4l2_i2c_subdev_init(sd, client, &wm8739_ops);
-        state->vol_l = 0x17; /* 0dB */
-        state->vol_r = 0x17; /* 0dB */
-        state->muted = 0;
-        state->balance = 32768;
-        /* normalize (12dB(31) to -34.5dB(0) [0dB(23)] -> 65535 to 0) */
-        state->volume = ((long)state->vol_l + 1) * 65535 / 31;
+        v4l2_ctrl_handler_init(&state->hdl, 2);
+        state->volume = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops,
+                        V4L2_CID_AUDIO_VOLUME, 0, 65535, 65535 / 100, 50736);
+        state->mute = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops,
+                        V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
+        state->balance = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops,
+                        V4L2_CID_AUDIO_BALANCE, 0, 65535, 65535 / 100, 32768);
+        sd->ctrl_handler = &state->hdl;
+        if (state->hdl.error) {
+                int err = state->hdl.error;
+
+                v4l2_ctrl_handler_free(&state->hdl);
+                kfree(state);
+                return err;
+        }
+        v4l2_ctrl_cluster(3, &state->volume);
+
         state->clock_freq = 48000;
 
         /* Initialize wm8739 */
@@ -318,15 +261,17 @@ static int wm8739_probe(struct i2c_client *client,
         /* activate */
         wm8739_write(sd, R9, 0x001);
         /* set volume/mute */
-        wm8739_set_audio(sd);
+        v4l2_ctrl_handler_setup(&state->hdl);
         return 0;
 }
 
 static int wm8739_remove(struct i2c_client *client)
 {
         struct v4l2_subdev *sd = i2c_get_clientdata(client);
+        struct wm8739_state *state = to_state(sd);
 
         v4l2_device_unregister_subdev(sd);
+        v4l2_ctrl_handler_free(&state->hdl);
         kfree(to_state(sd));
         return 0;
 }