--- /dev/null
+/*
+ * tlv320aic23b - driver version 0.0.1
+ *
+ * Copyright (C) 2006 Scott Alfter <salfter@ssai.us>
+ *
+ * Based on wm8775 driver
+ *
+ * Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to>
+ * Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
+ *
+ * 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-ctrls.h>
+
+MODULE_DESCRIPTION("tlv320aic23b driver");
+MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil");
+MODULE_LICENSE("GPL");
+
+
+/* ----------------------------------------------------------------------- */
+
+struct tlv320aic23b_state {
+ struct v4l2_subdev sd;
+ struct v4l2_ctrl_handler hdl;
+};
+
+static inline struct tlv320aic23b_state *to_state(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct tlv320aic23b_state, sd);
+}
+
+static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
+{
+ return &container_of(ctrl->handler, struct tlv320aic23b_state, hdl)->sd;
+}
+
+static int tlv320aic23b_write(struct v4l2_subdev *sd, int reg, u16 val)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ int i;
+
+ if ((reg < 0 || reg > 9) && (reg != 15)) {
+ 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 int tlv320aic23b_s_clock_freq(struct v4l2_subdev *sd, u32 freq)
+{
+ switch (freq) {
+ case 32000: /* set sample rate to 32 kHz */
+ tlv320aic23b_write(sd, 8, 0x018);
+ break;
+ case 44100: /* set sample rate to 44.1 kHz */
+ tlv320aic23b_write(sd, 8, 0x022);
+ break;
+ case 48000: /* set sample rate to 48 kHz */
+ tlv320aic23b_write(sd, 8, 0x000);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int tlv320aic23b_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct v4l2_subdev *sd = to_sd(ctrl);
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ tlv320aic23b_write(sd, 0, 0x180); /* mute both channels */
+ /* set gain on both channels to +3.0 dB */
+ if (!ctrl->val)
+ tlv320aic23b_write(sd, 0, 0x119);
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int tlv320aic23b_log_status(struct v4l2_subdev *sd)
+{
+ struct tlv320aic23b_state *state = to_state(sd);
+
+ v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_ctrl_ops tlv320aic23b_ctrl_ops = {
+ .s_ctrl = tlv320aic23b_s_ctrl,
+};
+
+static const struct v4l2_subdev_core_ops tlv320aic23b_core_ops = {
+ .log_status = tlv320aic23b_log_status,
+ .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 tlv320aic23b_audio_ops = {
+ .s_clock_freq = tlv320aic23b_s_clock_freq,
+};
+
+static const struct v4l2_subdev_ops tlv320aic23b_ops = {
+ .core = &tlv320aic23b_core_ops,
+ .audio = &tlv320aic23b_audio_ops,
+};
+
+/* ----------------------------------------------------------------------- */
+
+/* i2c implementation */
+
+/*
+ * Generic i2c probe
+ * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
+ */
+
+static int tlv320aic23b_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct tlv320aic23b_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 = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
+ if (state == NULL)
+ return -ENOMEM;
+ sd = &state->sd;
+ v4l2_i2c_subdev_init(sd, client, &tlv320aic23b_ops);
+
+ /* Initialize tlv320aic23b */
+
+ /* RESET */
+ tlv320aic23b_write(sd, 15, 0x000);
+ /* turn off DAC & mic input */
+ tlv320aic23b_write(sd, 6, 0x00A);
+ /* left-justified, 24-bit, master mode */
+ tlv320aic23b_write(sd, 7, 0x049);
+ /* set gain on both channels to +3.0 dB */
+ tlv320aic23b_write(sd, 0, 0x119);
+ /* set sample rate to 48 kHz */
+ tlv320aic23b_write(sd, 8, 0x000);
+ /* activate digital interface */
+ tlv320aic23b_write(sd, 9, 0x001);
+
+ v4l2_ctrl_handler_init(&state->hdl, 1);
+ v4l2_ctrl_new_std(&state->hdl, &tlv320aic23b_ctrl_ops,
+ V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
+ sd->ctrl_handler = &state->hdl;
+ if (state->hdl.error) {
+ int err = state->hdl.error;
+
+ v4l2_ctrl_handler_free(&state->hdl);
+ return err;
+ }
+ v4l2_ctrl_handler_setup(&state->hdl);
+ return 0;
+}
+
+static int tlv320aic23b_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct tlv320aic23b_state *state = to_state(sd);
+
+ v4l2_device_unregister_subdev(sd);
+ v4l2_ctrl_handler_free(&state->hdl);
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct i2c_device_id tlv320aic23b_id[] = {
+ { "tlv320aic23b", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tlv320aic23b_id);
+
+static struct i2c_driver tlv320aic23b_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "tlv320aic23b",
+ },
+ .probe = tlv320aic23b_probe,
+ .remove = tlv320aic23b_remove,
+ .id_table = tlv320aic23b_id,
+};
+
+module_i2c_driver(tlv320aic23b_driver);
Code Review / kvmfornfv.git / blobdiff