1 files changed, 252 insertions, 0 deletions

diff --git a/drivers/media/i2c/cs5345.c b/drivers/media/i2c/cs5345.c
new file mode 100644
index 000000000000..c8581e26fa9c
--- /dev/null
+++ b/drivers/media/i2c/cs5345.c
@@ -0,0 +1,252 @@
+/*
+ * cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC
+ * Copyright (C) 2007 Hans Verkuil
+ *
+ * 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/kernel.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <linux/slab.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-chip-ident.h>
+#include <media/v4l2-ctrls.h>
+
+MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
+MODULE_AUTHOR("Hans Verkuil");
+MODULE_LICENSE("GPL");
+
+static bool debug;
+
+module_param(debug, bool, 0644);
+
+MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
+
+struct cs5345_state {
+        struct v4l2_subdev sd;
+        struct v4l2_ctrl_handler hdl;
+};
+
+static inline struct cs5345_state *to_state(struct v4l2_subdev *sd)
+{
+        return container_of(sd, struct cs5345_state, sd);
+}
+
+static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
+{
+        return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        return i2c_smbus_write_byte_data(client, reg, value);
+}
+
+static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int cs5345_s_routing(struct v4l2_subdev *sd,
+                            u32 input, u32 output, u32 config)
+{
+        if ((input & 0xf) > 6) {
+                v4l2_err(sd, "Invalid input %d.\n", input);
+                return -EINVAL;
+        }
+        cs5345_write(sd, 0x09, input & 0xf);
+        cs5345_write(sd, 0x05, input & 0xf0);
+        return 0;
+}
+
+static int cs5345_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+        struct v4l2_subdev *sd = to_sd(ctrl);
+
+        switch (ctrl->id) {
+        case V4L2_CID_AUDIO_MUTE:
+                cs5345_write(sd, 0x04, ctrl->val ? 0x80 : 0);
+                return 0;
+        case V4L2_CID_AUDIO_VOLUME:
+                cs5345_write(sd, 0x07, ((u8)ctrl->val) & 0x3f);
+                cs5345_write(sd, 0x08, ((u8)ctrl->val) & 0x3f);
+                return 0;
+        }
+        return -EINVAL;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        if (!v4l2_chip_match_i2c_client(client, &reg->match))
+                return -EINVAL;
+        if (!capable(CAP_SYS_ADMIN))
+                return -EPERM;
+        reg->size = 1;
+        reg->val = cs5345_read(sd, reg->reg & 0x1f);
+        return 0;
+}
+
+static int cs5345_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
+{
+        struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+        if (!v4l2_chip_match_i2c_client(client, &reg->match))
+                return -EINVAL;
+        if (!capable(CAP_SYS_ADMIN))
+                return -EPERM;
+        cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff);
+        return 0;
+}
+#endif
+
+static int cs5345_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_CS5345, 0);
+}
+
+static int cs5345_log_status(struct v4l2_subdev *sd)
+{
+        u8 v = cs5345_read(sd, 0x09) & 7;
+        u8 m = cs5345_read(sd, 0x04);
+        int vol = cs5345_read(sd, 0x08) & 0x3f;
+
+        v4l2_info(sd, "Input:  %d%s\n", v,
+                        (m & 0x80) ? " (muted)" : "");
+        if (vol >= 32)
+                vol = vol - 64;
+        v4l2_info(sd, "Volume: %d dB\n", vol);
+        return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_ctrl_ops cs5345_ctrl_ops = {
+        .s_ctrl = cs5345_s_ctrl,
+};
+
+static const struct v4l2_subdev_core_ops cs5345_core_ops = {
+        .log_status = cs5345_log_status,
+        .g_chip_ident = cs5345_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,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+        .g_register = cs5345_g_register,
+        .s_register = cs5345_s_register,
+#endif
+};
+
+static const struct v4l2_subdev_audio_ops cs5345_audio_ops = {
+        .s_routing = cs5345_s_routing,
+};
+
+static const struct v4l2_subdev_ops cs5345_ops = {
+        .core = &cs5345_core_ops,
+        .audio = &cs5345_audio_ops,
+};
+
+/* ----------------------------------------------------------------------- */
+
+static int cs5345_probe(struct i2c_client *client,
+                        const struct i2c_device_id *id)
+{
+        struct cs5345_state *state;
+        struct v4l2_subdev *sd;
+
+        /* 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%x (%s)\n",
+                        client->addr << 1, client->adapter->name);
+
+        state = kzalloc(sizeof(struct cs5345_state), GFP_KERNEL);
+        if (state == NULL)
+                return -ENOMEM;
+        sd = &state->sd;
+        v4l2_i2c_subdev_init(sd, client, &cs5345_ops);
+
+        v4l2_ctrl_handler_init(&state->hdl, 2);
+        v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops,
+                        V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
+        v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops,
+                        V4L2_CID_AUDIO_VOLUME, -24, 24, 1, 0);
+        sd->ctrl_handler = &state->hdl;
+        if (state->hdl.error) {
+                int err = state->hdl.error;
+
+                v4l2_ctrl_handler_free(&state->hdl);
+                kfree(state);
+                return err;
+        }
+        /* set volume/mute */
+        v4l2_ctrl_handler_setup(&state->hdl);
+
+        cs5345_write(sd, 0x02, 0x00);
+        cs5345_write(sd, 0x04, 0x01);
+        cs5345_write(sd, 0x09, 0x01);
+        return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int cs5345_remove(struct i2c_client *client)
+{
+        struct v4l2_subdev *sd = i2c_get_clientdata(client);
+        struct cs5345_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 cs5345_id[] = {
+        { "cs5345", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, cs5345_id);
+
+static struct i2c_driver cs5345_driver = {
+        .driver = {
+                .owner  = THIS_MODULE,
+                .name   = "cs5345",
+        },
+        .probe          = cs5345_probe,
+        .remove         = cs5345_remove,
+        .id_table       = cs5345_id,
+};
+
+module_i2c_driver(cs5345_driver);