1 files changed, 342 insertions, 0 deletions

diff --git a/drivers/media/i2c/wm8775.c b/drivers/media/i2c/wm8775.c
new file mode 100644
index 000000000000..bee77ea9f49e
--- /dev/null
+++ b/drivers/media/i2c/wm8775.c
@@ -0,0 +1,342 @@
+/*
+ * wm8775 - driver version 0.0.1
+ *
+ * Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to>
+ *
+ * Based on saa7115 driver
+ *
+ * Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
+ * - Cleanup
+ * - V4L2 API update
+ * - sound fixes
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/ioctl.h>
+#include <asm/uaccess.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-chip-ident.h>
+#include <media/v4l2-ctrls.h>
+#include <media/wm8775.h>
+
+MODULE_DESCRIPTION("wm8775 driver");
+MODULE_AUTHOR("Ulf Eklund, Hans Verkuil");
+MODULE_LICENSE("GPL");
+
+
+
+/* ----------------------------------------------------------------------- */
+
+enum {
+        R7 = 7, R11 = 11,
+        R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R23 = 23,
+        TOT_REGS
+};
+
+#define ALC_HOLD 0x85 /* R17: use zero cross detection, ALC hold time 42.6 ms */
+#define ALC_EN 0x100  /* R17: ALC enable */
+
+struct wm8775_state {
+        struct v4l2_subdev sd;
+        struct v4l2_ctrl_handler hdl;
+        struct v4l2_ctrl *mute;
+        struct v4l2_ctrl *vol;
+        struct v4l2_ctrl *bal;
+        struct v4l2_ctrl *loud;
+        u8 input;               /* Last selected input (0-0xf) */
+};
+
+static inline struct wm8775_state *to_state(struct v4l2_subdev *sd)
+{
+        return container_of(sd, struct wm8775_state, sd);
+}
+
+static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
+{
+        return &container_of(ctrl->handler, struct wm8775_state, hdl)->sd;
+}
+
+static int wm8775_write(struct v4l2_subdev *sd, int reg, u16 val)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+        int i;
+
+        if (reg < 0 || reg >= TOT_REGS) {
+                v4l2_err(sd, "Invalid register R%d\n", reg);
+                return -1;
+        }
+
+        for (i = 0; i < 3; i++)
+                if (i2c_smbus_write_byte_data(client,
+                                (reg << 1) | (val >> 8), val & 0xff) == 0)
+                        return 0;
+        v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg);
+        return -1;
+}
+
+static void wm8775_set_audio(struct v4l2_subdev *sd, int quietly)
+{
+        struct wm8775_state *state = to_state(sd);
+        u8 vol_l, vol_r;
+        int muted = 0 != state->mute->val;
+        u16 volume = (u16)state->vol->val;
+        u16 balance = (u16)state->bal->val;
+
+        /* normalize ( 65535 to 0 -> 255 to 0 (+24dB to -103dB) ) */
+        vol_l = (min(65536 - balance, 32768) * volume) >> 23;
+        vol_r = (min(balance, (u16)32768) * volume) >> 23;
+
+        /* Mute */
+        if (muted || quietly)
+                wm8775_write(sd, R21, 0x0c0 | state->input);
+
+        wm8775_write(sd, R14, vol_l | 0x100); /* 0x100= Left channel ADC zero cross enable */
+        wm8775_write(sd, R15, vol_r | 0x100); /* 0x100= Right channel ADC zero cross enable */
+
+        /* Un-mute */
+        if (!muted)
+                wm8775_write(sd, R21, state->input);
+}
+
+static int wm8775_s_routing(struct v4l2_subdev *sd,
+                            u32 input, u32 output, u32 config)
+{
+        struct wm8775_state *state = to_state(sd);
+
+        /* There are 4 inputs and one output. Zero or more inputs
+           are multiplexed together to the output. Hence there are
+           16 combinations.
+           If only one input is active (the normal case) then the
+           input values 1, 2, 4 or 8 should be used. */
+        if (input > 15) {
+                v4l2_err(sd, "Invalid input %d.\n", input);
+                return -EINVAL;
+        }
+        state->input = input;
+        if (!v4l2_ctrl_g_ctrl(state->mute))
+                return 0;
+        if (!v4l2_ctrl_g_ctrl(state->vol))
+                return 0;
+        if (!v4l2_ctrl_g_ctrl(state->bal))
+                return 0;
+        wm8775_set_audio(sd, 1);
+        return 0;
+}
+
+static int wm8775_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+        struct v4l2_subdev *sd = to_sd(ctrl);
+
+        switch (ctrl->id) {
+        case V4L2_CID_AUDIO_MUTE:
+        case V4L2_CID_AUDIO_VOLUME:
+        case V4L2_CID_AUDIO_BALANCE:
+                wm8775_set_audio(sd, 0);
+                return 0;
+        case V4L2_CID_AUDIO_LOUDNESS:
+                wm8775_write(sd, R17, (ctrl->val ? ALC_EN : 0) | ALC_HOLD);
+                return 0;
+        }
+        return -EINVAL;
+}
+
+static int wm8775_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_WM8775, 0);
+}
+
+static int wm8775_log_status(struct v4l2_subdev *sd)
+{
+        struct wm8775_state *state = to_state(sd);
+
+        v4l2_info(sd, "Input: %d\n", state->input);
+        v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
+        return 0;
+}
+
+static int wm8775_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *freq)
+{
+        wm8775_set_audio(sd, 0);
+        return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_ctrl_ops wm8775_ctrl_ops = {
+        .s_ctrl = wm8775_s_ctrl,
+};
+
+static const struct v4l2_subdev_core_ops wm8775_core_ops = {
+        .log_status = wm8775_log_status,
+        .g_chip_ident = wm8775_g_chip_ident,
+        .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_tuner_ops wm8775_tuner_ops = {
+        .s_frequency = wm8775_s_frequency,
+};
+
+static const struct v4l2_subdev_audio_ops wm8775_audio_ops = {
+        .s_routing = wm8775_s_routing,
+};
+
+static const struct v4l2_subdev_ops wm8775_ops = {
+        .core = &wm8775_core_ops,
+        .tuner = &wm8775_tuner_ops,
+        .audio = &wm8775_audio_ops,
+};
+
+/* ----------------------------------------------------------------------- */
+
+/* i2c implementation */
+
+/*
+ * Generic i2c probe
+ * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
+ */
+
+static int wm8775_probe(struct i2c_client *client,
+                        const struct i2c_device_id *id)
+{
+        struct wm8775_state *state;
+        struct v4l2_subdev *sd;
+        int err;
+        bool is_nova_s = false;
+
+        if (client->dev.platform_data) {
+                struct wm8775_platform_data *data = client->dev.platform_data;
+                is_nova_s = data->is_nova_s;
+        }
+
+        /* Check if the adapter supports the needed features */
+        if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+                return -EIO;
+
+        v4l_info(client, "chip found @ 0x%02x (%s)\n",
+                        client->addr << 1, client->adapter->name);
+
+        state = kzalloc(sizeof(struct wm8775_state), GFP_KERNEL);
+        if (state == NULL)
+                return -ENOMEM;
+        sd = &state->sd;
+        v4l2_i2c_subdev_init(sd, client, &wm8775_ops);
+        state->input = 2;
+
+        v4l2_ctrl_handler_init(&state->hdl, 4);
+        state->mute = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,
+                        V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
+        state->vol = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,
+                        V4L2_CID_AUDIO_VOLUME, 0, 65535, (65535+99)/100, 0xCF00); /* 0dB*/
+        state->bal = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,
+                        V4L2_CID_AUDIO_BALANCE, 0, 65535, (65535+99)/100, 32768);
+        state->loud = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops,
+                        V4L2_CID_AUDIO_LOUDNESS, 0, 1, 1, 1);
+        sd->ctrl_handler = &state->hdl;
+        err = state->hdl.error;
+        if (err) {
+                v4l2_ctrl_handler_free(&state->hdl);
+                kfree(state);
+                return err;
+        }
+
+        /* Initialize wm8775 */
+
+        /* RESET */
+        wm8775_write(sd, R23, 0x000);
+        /* Disable zero cross detect timeout */
+        wm8775_write(sd, R7, 0x000);
+        /* HPF enable, left justified, 24-bit (Philips) mode */
+        wm8775_write(sd, R11, 0x021);
+        /* Master mode, clock ratio 256fs */
+        wm8775_write(sd, R12, 0x102);
+        /* Powered up */
+        wm8775_write(sd, R13, 0x000);
+
+        if (!is_nova_s) {
+                /* ADC gain +2.5dB, enable zero cross */
+                wm8775_write(sd, R14, 0x1d4);
+                /* ADC gain +2.5dB, enable zero cross */
+                wm8775_write(sd, R15, 0x1d4);
+                /* ALC Stereo, ALC target level -1dB FS max gain +8dB */
+                wm8775_write(sd, R16, 0x1bf);
+                /* Enable gain control, use zero cross detection,
+                   ALC hold time 42.6 ms */
+                wm8775_write(sd, R17, 0x185);
+        } else {
+                /* ALC stereo, ALC target level -5dB FS, ALC max gain +8dB */
+                wm8775_write(sd, R16, 0x1bb);
+                /* Set ALC mode and hold time */
+                wm8775_write(sd, R17, (state->loud->val ? ALC_EN : 0) | ALC_HOLD);
+        }
+        /* ALC gain ramp up delay 34 s, ALC gain ramp down delay 33 ms */
+        wm8775_write(sd, R18, 0x0a2);
+        /* Enable noise gate, threshold -72dBfs */
+        wm8775_write(sd, R19, 0x005);
+        if (!is_nova_s) {
+                /* Transient window 4ms, lower PGA gain limit -1dB */
+                wm8775_write(sd, R20, 0x07a);
+                /* LRBOTH = 1, use input 2. */
+                wm8775_write(sd, R21, 0x102);
+        } else {
+                /* Transient window 4ms, ALC min gain -5dB  */
+                wm8775_write(sd, R20, 0x0fb);
+
+                wm8775_set_audio(sd, 1);      /* set volume/mute/mux */
+        }
+        return 0;
+}
+
+static int wm8775_remove(struct i2c_client *client)
+{
+        struct v4l2_subdev *sd = i2c_get_clientdata(client);
+        struct wm8775_state *state = to_state(sd);
+
+        v4l2_device_unregister_subdev(sd);
+        v4l2_ctrl_handler_free(&state->hdl);
+        kfree(state);
+        return 0;
+}
+
+static const struct i2c_device_id wm8775_id[] = {
+        { "wm8775", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, wm8775_id);
+
+static struct i2c_driver wm8775_driver = {
+        .driver = {
+                .owner  = THIS_MODULE,
+                .name   = "wm8775",
+        },
+        .probe          = wm8775_probe,
+        .remove         = wm8775_remove,
+        .id_table       = wm8775_id,
+};
+
+module_i2c_driver(wm8775_driver);