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path: root/drivers/media/video/wm8739.c
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Diffstat (limited to 'drivers/media/video/wm8739.c')
-rw-r--r--drivers/media/video/wm8739.c355
1 files changed, 355 insertions, 0 deletions
diff --git a/drivers/media/video/wm8739.c b/drivers/media/video/wm8739.c
new file mode 100644
index 00000000000..a9b59c35cd6
--- /dev/null
+++ b/drivers/media/video/wm8739.c
@@ -0,0 +1,355 @@
+/*
+ * wm8739
+ *
+ * Copyright (C) 2005 T. Adachi <tadachi@tadachi-net.com>
+ *
+ * Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
+ * - Cleanup
+ *
+ * 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/ioctl.h>
+#include <asm/uaccess.h>
+#include <linux/i2c.h>
+#include <linux/i2c-id.h>
+#include <linux/videodev.h>
+#include <media/v4l2-common.h>
+
+MODULE_DESCRIPTION("wm8739 driver");
+MODULE_AUTHOR("T. Adachi, Hans Verkuil");
+MODULE_LICENSE("GPL");
+
+static int debug = 0;
+static unsigned short normal_i2c[] = { 0x34 >> 1, 0x36 >> 1, I2C_CLIENT_END };
+
+module_param(debug, int, 0644);
+
+MODULE_PARM_DESC(debug, "Debug level (0-1)");
+
+
+I2C_CLIENT_INSMOD;
+
+/* ------------------------------------------------------------------------ */
+
+enum {
+ R0 = 0, R1,
+ R5 = 5, R6, R7, R8, R9, R15 = 15,
+ TOT_REGS
+};
+
+struct wm8739_state {
+ 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 int wm8739_write(struct i2c_client *client, int reg, u16 val)
+{
+ int i;
+
+ if (reg < 0 || reg >= TOT_REGS) {
+ v4l_err(client, "Invalid register R%d\n", reg);
+ return -1;
+ }
+
+ v4l_dbg(1, debug, client, "write: %02x %02x\n", reg, val);
+
+ 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);
+ return -1;
+}
+
+/* write regs to set audio volume etc */
+static void wm8739_set_audio(struct i2c_client *client)
+{
+ struct wm8739_state *state = i2c_get_clientdata(client);
+ 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(client, R0, (state->vol_l & 0x1f) | mute);
+ wm8739_write(client, R1, (state->vol_r & 0x1f) | mute);
+}
+
+static int wm8739_get_ctrl(struct i2c_client *client, struct v4l2_control *ctrl)
+{
+ struct wm8739_state *state = i2c_get_clientdata(client);
+
+ 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_set_ctrl(struct i2c_client *client, struct v4l2_control *ctrl)
+{
+ struct wm8739_state *state = i2c_get_clientdata(client);
+ unsigned int work_l, work_r;
+
+ 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:
+ return -EINVAL;
+ }
+
+ /* 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;
+
+ state->vol_l = (long)work_l * 31 / 65535;
+ state->vol_r = (long)work_r * 31 / 65535;
+
+ /* set audio volume etc. */
+ wm8739_set_audio(client);
+ 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_command(struct i2c_client *client, unsigned int cmd, void *arg)
+{
+ struct wm8739_state *state = i2c_get_clientdata(client);
+
+ switch (cmd) {
+ case VIDIOC_INT_AUDIO_CLOCK_FREQ:
+ {
+ u32 audiofreq = *(u32 *)arg;
+
+ state->clock_freq = audiofreq;
+ wm8739_write(client, R9, 0x000); /* de-activate */
+ switch (audiofreq) {
+ case 44100:
+ wm8739_write(client, R8, 0x020); /* 256fps, fs=44.1k */
+ break;
+ case 48000:
+ wm8739_write(client, R8, 0x000); /* 256fps, fs=48k */
+ break;
+ case 32000:
+ wm8739_write(client, R8, 0x018); /* 256fps, fs=32k */
+ break;
+ default:
+ break;
+ }
+ wm8739_write(client, R9, 0x001); /* activate */
+ break;
+ }
+
+ case VIDIOC_G_CTRL:
+ return wm8739_get_ctrl(client, arg);
+
+ case VIDIOC_S_CTRL:
+ return wm8739_set_ctrl(client, arg);
+
+ case VIDIOC_QUERYCTRL:
+ {
+ struct v4l2_queryctrl *qc = arg;
+ 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;
+ }
+
+ case VIDIOC_LOG_STATUS:
+ v4l_info(client, "Frequency: %u Hz\n", state->clock_freq);
+ v4l_info(client, "Volume L: %02x%s\n", state->vol_l & 0x1f,
+ state->muted ? " (muted)" : "");
+ v4l_info(client, "Volume R: %02x%s\n", state->vol_r & 0x1f,
+ state->muted ? " (muted)" : "");
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* ------------------------------------------------------------------------ */
+
+/* i2c implementation */
+
+static struct i2c_driver i2c_driver;
+
+static int wm8739_attach(struct i2c_adapter *adapter, int address, int kind)
+{
+ struct i2c_client *client;
+ struct wm8739_state *state;
+
+ /* Check if the adapter supports the needed features */
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return 0;
+
+ client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
+ if (client == NULL)
+ return -ENOMEM;
+
+ client->addr = address;
+ client->adapter = adapter;
+ client->driver = &i2c_driver;
+ snprintf(client->name, sizeof(client->name) - 1, "wm8739");
+
+ v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
+
+ state = kmalloc(sizeof(struct wm8739_state), GFP_KERNEL);
+ if (state == NULL) {
+ kfree(client);
+ return -ENOMEM;
+ }
+ 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;
+ state->clock_freq = 48000;
+ i2c_set_clientdata(client, state);
+
+ /* initialize wm8739 */
+ wm8739_write(client, R15, 0x00); /* reset */
+ wm8739_write(client, R5, 0x000); /* filter setting, high path, offet clear */
+ wm8739_write(client, R6, 0x000); /* ADC, OSC, Power Off mode Disable */
+ wm8739_write(client, R7, 0x049); /* Digital Audio interface format */
+ /* Enable Master mode */
+ /* 24 bit, MSB first/left justified */
+ wm8739_write(client, R8, 0x000); /* sampling control */
+ /* normal, 256fs, 48KHz sampling rate */
+ wm8739_write(client, R9, 0x001); /* activate */
+ wm8739_set_audio(client); /* set volume/mute */
+
+ i2c_attach_client(client);
+
+ return 0;
+}
+
+static int wm8739_probe(struct i2c_adapter *adapter)
+{
+ if (adapter->class & I2C_CLASS_TV_ANALOG)
+ return i2c_probe(adapter, &addr_data, wm8739_attach);
+ return 0;
+}
+
+static int wm8739_detach(struct i2c_client *client)
+{
+ int err;
+
+ err = i2c_detach_client(client);
+ if (err)
+ return err;
+
+ kfree(client);
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+/* i2c implementation */
+static struct i2c_driver i2c_driver = {
+ .driver = {
+ .name = "wm8739",
+ },
+ .id = I2C_DRIVERID_WM8739,
+ .attach_adapter = wm8739_probe,
+ .detach_client = wm8739_detach,
+ .command = wm8739_command,
+};
+
+
+static int __init wm8739_init_module(void)
+{
+ return i2c_add_driver(&i2c_driver);
+}
+
+static void __exit wm8739_cleanup_module(void)
+{
+ i2c_del_driver(&i2c_driver);
+}
+
+module_init(wm8739_init_module);
+module_exit(wm8739_cleanup_module);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-13 00:58:28 +0000