#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/i2c-id.h>
-#include <linux/videodev.h>
-#include <media/v4l2-common.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-chip-ident.h>
+#include <media/v4l2-i2c-drv.h>
MODULE_DESCRIPTION("wm8775 driver");
MODULE_AUTHOR("Ulf Eklund, Hans Verkuil");
MODULE_LICENSE("GPL");
-static unsigned short normal_i2c[] = { 0x36 >> 1, I2C_CLIENT_END };
-I2C_CLIENT_INSMOD;
-
/* ----------------------------------------------------------------------- */
enum {
};
struct wm8775_state {
+ struct v4l2_subdev sd;
u8 input; /* Last selected input (0-0xf) */
u8 muted;
};
-static int wm8775_write(struct i2c_client *client, int reg, u16 val)
+static inline struct wm8775_state *to_state(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct wm8775_state, 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) {
- v4l_err(client, "Invalid register R%d\n", reg);
+ 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) {
+ for (i = 0; i < 3; i++)
+ if (i2c_smbus_write_byte_data(client,
+ (reg << 1) | (val >> 8), val & 0xff) == 0)
return 0;
- }
- }
- v4l_err(client, "I2C: cannot write %03x to register R%d\n", val, reg);
+ v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg);
return -1;
}
-static int wm8775_command(struct i2c_client *client, unsigned int cmd,
- void *arg)
+static int wm8775_s_routing(struct v4l2_subdev *sd,
+ u32 input, u32 output, u32 config)
{
- struct wm8775_state *state = i2c_get_clientdata(client);
- struct v4l2_audio *input = arg;
- struct v4l2_control *ctrl = arg;
-
- switch (cmd) {
- case VIDIOC_S_AUDIO:
- /* 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->index > 15) {
- v4l_err(client, "Invalid input %d.\n", input->index);
- return -EINVAL;
- }
- state->input = input->index;
- if (state->muted)
- break;
- wm8775_write(client, R21, 0x0c0);
- wm8775_write(client, R14, 0x1d4);
- wm8775_write(client, R15, 0x1d4);
- wm8775_write(client, R21, 0x100 + state->input);
- break;
-
- case VIDIOC_G_AUDIO:
- memset(input, 0, sizeof(*input));
- input->index = state->input;
- break;
-
- case VIDIOC_G_CTRL:
- if (ctrl->id != V4L2_CID_AUDIO_MUTE)
- return -EINVAL;
- ctrl->value = state->muted;
- break;
-
- case VIDIOC_S_CTRL:
- if (ctrl->id != V4L2_CID_AUDIO_MUTE)
- return -EINVAL;
- state->muted = ctrl->value;
- wm8775_write(client, R21, 0x0c0);
- wm8775_write(client, R14, 0x1d4);
- wm8775_write(client, R15, 0x1d4);
- if (!state->muted)
- wm8775_write(client, R21, 0x100 + state->input);
- break;
-
- case VIDIOC_LOG_STATUS:
- v4l_info(client, "Input: %d%s\n", state->input,
- state->muted ? " (muted)" : "");
- break;
-
- case VIDIOC_S_FREQUENCY:
- /* If I remove this, then it can happen that I have no
- sound the first time I tune from static to a valid channel.
- It's difficult to reproduce and is almost certainly related
- to the zero cross detect circuit. */
- wm8775_write(client, R21, 0x0c0);
- wm8775_write(client, R14, 0x1d4);
- wm8775_write(client, R15, 0x1d4);
- wm8775_write(client, R21, 0x100 + state->input);
- break;
-
- default:
+ 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 (state->muted)
+ return 0;
+ wm8775_write(sd, R21, 0x0c0);
+ wm8775_write(sd, R14, 0x1d4);
+ wm8775_write(sd, R15, 0x1d4);
+ wm8775_write(sd, R21, 0x100 + state->input);
+ return 0;
+}
+
+static int wm8775_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+ struct wm8775_state *state = to_state(sd);
+
+ if (ctrl->id != V4L2_CID_AUDIO_MUTE)
+ return -EINVAL;
+ ctrl->value = state->muted;
+ return 0;
+}
+
+static int wm8775_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+ struct wm8775_state *state = to_state(sd);
+
+ if (ctrl->id != V4L2_CID_AUDIO_MUTE)
+ return -EINVAL;
+ state->muted = ctrl->value;
+ wm8775_write(sd, R21, 0x0c0);
+ wm8775_write(sd, R14, 0x1d4);
+ wm8775_write(sd, R15, 0x1d4);
+ if (!state->muted)
+ wm8775_write(sd, R21, 0x100 + state->input);
+ return 0;
+}
+
+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%s\n", state->input,
+ state->muted ? " (muted)" : "");
+ return 0;
+}
+
+static int wm8775_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *freq)
+{
+ struct wm8775_state *state = to_state(sd);
+
+ /* If I remove this, then it can happen that I have no
+ sound the first time I tune from static to a valid channel.
+ It's difficult to reproduce and is almost certainly related
+ to the zero cross detect circuit. */
+ wm8775_write(sd, R21, 0x0c0);
+ wm8775_write(sd, R14, 0x1d4);
+ wm8775_write(sd, R15, 0x1d4);
+ wm8775_write(sd, R21, 0x100 + state->input);
return 0;
}
/* ----------------------------------------------------------------------- */
+static const struct v4l2_subdev_core_ops wm8775_core_ops = {
+ .log_status = wm8775_log_status,
+ .g_chip_ident = wm8775_g_chip_ident,
+ .g_ctrl = wm8775_g_ctrl,
+ .s_ctrl = wm8775_s_ctrl,
+};
+
+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 */
/*
* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
*/
-static struct i2c_driver i2c_driver;
-
-static int wm8775_attach(struct i2c_adapter *adapter, int address, int kind)
+static int wm8775_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
{
- struct i2c_client *client;
struct wm8775_state *state;
+ struct v4l2_subdev *sd;
/* Check if the adapter supports the needed features */
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- return 0;
-
- client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
- if (client == 0)
- return -ENOMEM;
-
- memset(client, 0, sizeof(struct i2c_client));
- client->addr = address;
- client->adapter = adapter;
- client->driver = &i2c_driver;
- snprintf(client->name, sizeof(client->name) - 1, "wm8775");
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -EIO;
- v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
+ v4l_info(client, "chip found @ 0x%02x (%s)\n",
+ client->addr << 1, client->adapter->name);
state = kmalloc(sizeof(struct wm8775_state), GFP_KERNEL);
- if (state == NULL) {
- kfree(client);
+ if (state == NULL)
return -ENOMEM;
- }
+ sd = &state->sd;
+ v4l2_i2c_subdev_init(sd, client, &wm8775_ops);
state->input = 2;
state->muted = 0;
- i2c_set_clientdata(client, state);
-
- /* initialize wm8775 */
- wm8775_write(client, R23, 0x000); /* RESET */
- wm8775_write(client, R7, 0x000); /* Disable zero cross detect timeout */
- wm8775_write(client, R11, 0x021); /* Left justified, 24-bit mode */
- wm8775_write(client, R12, 0x102); /* Master mode, clock ratio 256fs */
- wm8775_write(client, R13, 0x000); /* Powered up */
- wm8775_write(client, R14, 0x1d4); /* ADC gain +2.5dB, enable zero cross */
- wm8775_write(client, R15, 0x1d4); /* ADC gain +2.5dB, enable zero cross */
- wm8775_write(client, R16, 0x1bf); /* ALC Stereo, ALC target level -1dB FS */
- /* max gain +8dB */
- wm8775_write(client, R17, 0x185); /* Enable gain control, use zero cross */
- /* detection, ALC hold time 42.6 ms */
- wm8775_write(client, R18, 0x0a2); /* ALC gain ramp up delay 34 s, */
- /* ALC gain ramp down delay 33 ms */
- wm8775_write(client, R19, 0x005); /* Enable noise gate, threshold -72dBfs */
- wm8775_write(client, R20, 0x07a); /* Transient window 4ms, lower PGA gain */
- /* limit -1dB */
- wm8775_write(client, R21, 0x102); /* LRBOTH = 1, use input 2. */
- i2c_attach_client(client);
-
- return 0;
-}
-static int wm8775_probe(struct i2c_adapter *adapter)
-{
- if (adapter->class & I2C_CLASS_TV_ANALOG)
- return i2c_probe(adapter, &addr_data, wm8775_attach);
+ /* Initialize wm8775 */
+
+ /* RESET */
+ wm8775_write(sd, R23, 0x000);
+ /* Disable zero cross detect timeout */
+ wm8775_write(sd, R7, 0x000);
+ /* Left justified, 24-bit mode */
+ wm8775_write(sd, R11, 0x021);
+ /* Master mode, clock ratio 256fs */
+ wm8775_write(sd, R12, 0x102);
+ /* Powered up */
+ wm8775_write(sd, R13, 0x000);
+ /* 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);
+ /* 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);
+ /* Transient window 4ms, lower PGA gain limit -1dB */
+ wm8775_write(sd, R20, 0x07a);
+ /* LRBOTH = 1, use input 2. */
+ wm8775_write(sd, R21, 0x102);
return 0;
}
-static int wm8775_detach(struct i2c_client *client)
+static int wm8775_remove(struct i2c_client *client)
{
- int err;
-
- err = i2c_detach_client(client);
- if (err) {
- return err;
- }
- kfree(client);
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ v4l2_device_unregister_subdev(sd);
+ kfree(to_state(sd));
return 0;
}
-/* ----------------------------------------------------------------------- */
-
-/* i2c implementation */
-static struct i2c_driver i2c_driver = {
- .driver = {
- .name = "wm8775",
- },
- .id = I2C_DRIVERID_WM8775,
- .attach_adapter = wm8775_probe,
- .detach_client = wm8775_detach,
- .command = wm8775_command,
+static const struct i2c_device_id wm8775_id[] = {
+ { "wm8775", 0 },
+ { }
};
+MODULE_DEVICE_TABLE(i2c, wm8775_id);
-
-static int __init wm8775_init_module(void)
-{
- return i2c_add_driver(&i2c_driver);
-}
-
-static void __exit wm8775_cleanup_module(void)
-{
- i2c_del_driver(&i2c_driver);
-}
-
-module_init(wm8775_init_module);
-module_exit(wm8775_cleanup_module);
+static struct v4l2_i2c_driver_data v4l2_i2c_data = {
+ .name = "wm8775",
+ .probe = wm8775_probe,
+ .remove = wm8775_remove,
+ .id_table = wm8775_id,
+};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff