--- /dev/null
+/*
+ * cs53l32a (Adaptec AVC-2010 and AVC-2410) i2c ivtv driver.
+ * Copyright (C) 2005 Martin Vaughan
+ *
+ * Audio source switching for Adaptec AVC-2410 added by Trev Jackson
+ *
+ * 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("i2c device driver for cs53l32a Audio ADC");
+MODULE_AUTHOR("Martin Vaughan");
+MODULE_LICENSE("GPL");
+
+static bool debug;
+
+module_param(debug, bool, 0644);
+
+MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
+
+
+struct cs53l32a_state {
+ struct v4l2_subdev sd;
+ struct v4l2_ctrl_handler hdl;
+};
+
+static inline struct cs53l32a_state *to_state(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct cs53l32a_state, sd);
+}
+
+static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
+{
+ return &container_of(ctrl->handler, struct cs53l32a_state, hdl)->sd;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int cs53l32a_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 int cs53l32a_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 cs53l32a_s_routing(struct v4l2_subdev *sd,
+ u32 input, u32 output, u32 config)
+{
+ /* There are 2 physical inputs, but the second input can be
+ placed in two modes, the first mode bypasses the PGA (gain),
+ the second goes through the PGA. Hence there are three
+ possible inputs to choose from. */
+ if (input > 2) {
+ v4l2_err(sd, "Invalid input %d.\n", input);
+ return -EINVAL;
+ }
+ cs53l32a_write(sd, 0x01, 0x01 + (input << 4));
+ return 0;
+}
+
+static int cs53l32a_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct v4l2_subdev *sd = to_sd(ctrl);
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ cs53l32a_write(sd, 0x03, ctrl->val ? 0xf0 : 0x30);
+ return 0;
+ case V4L2_CID_AUDIO_VOLUME:
+ cs53l32a_write(sd, 0x04, (u8)ctrl->val);
+ cs53l32a_write(sd, 0x05, (u8)ctrl->val);
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int cs53l32a_log_status(struct v4l2_subdev *sd)
+{
+ struct cs53l32a_state *state = to_state(sd);
+ u8 v = cs53l32a_read(sd, 0x01);
+
+ v4l2_info(sd, "Input: %d\n", (v >> 4) & 3);
+ v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_ctrl_ops cs53l32a_ctrl_ops = {
+ .s_ctrl = cs53l32a_s_ctrl,
+};
+
+static const struct v4l2_subdev_core_ops cs53l32a_core_ops = {
+ .log_status = cs53l32a_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 cs53l32a_audio_ops = {
+ .s_routing = cs53l32a_s_routing,
+};
+
+static const struct v4l2_subdev_ops cs53l32a_ops = {
+ .core = &cs53l32a_core_ops,
+ .audio = &cs53l32a_audio_ops,
+};
+
+/* ----------------------------------------------------------------------- */
+
+/* i2c implementation */
+
+/*
+ * Generic i2c probe
+ * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
+ */
+
+static int cs53l32a_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct cs53l32a_state *state;
+ struct v4l2_subdev *sd;
+ int i;
+
+ /* Check if the adapter supports the needed features */
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -EIO;
+
+ if (!id)
+ strlcpy(client->name, "cs53l32a", sizeof(client->name));
+
+ 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, &cs53l32a_ops);
+
+ for (i = 1; i <= 7; i++) {
+ u8 v = cs53l32a_read(sd, i);
+
+ v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v);
+ }
+
+ v4l2_ctrl_handler_init(&state->hdl, 2);
+ v4l2_ctrl_new_std(&state->hdl, &cs53l32a_ctrl_ops,
+ V4L2_CID_AUDIO_VOLUME, -96, 12, 1, 0);
+ v4l2_ctrl_new_std(&state->hdl, &cs53l32a_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;
+ }
+
+ /* Set cs53l32a internal register for Adaptec 2010/2410 setup */
+
+ cs53l32a_write(sd, 0x01, 0x21);
+ cs53l32a_write(sd, 0x02, 0x29);
+ cs53l32a_write(sd, 0x03, 0x30);
+ cs53l32a_write(sd, 0x04, 0x00);
+ cs53l32a_write(sd, 0x05, 0x00);
+ cs53l32a_write(sd, 0x06, 0x00);
+ cs53l32a_write(sd, 0x07, 0x00);
+
+ /* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */
+
+ for (i = 1; i <= 7; i++) {
+ u8 v = cs53l32a_read(sd, i);
+
+ v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v);
+ }
+ return 0;
+}
+
+static int cs53l32a_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct cs53l32a_state *state = to_state(sd);
+
+ v4l2_device_unregister_subdev(sd);
+ v4l2_ctrl_handler_free(&state->hdl);
+ return 0;
+}
+
+static const struct i2c_device_id cs53l32a_id[] = {
+ { "cs53l32a", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, cs53l32a_id);
+
+static struct i2c_driver cs53l32a_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "cs53l32a",
+ },
+ .probe = cs53l32a_probe,
+ .remove = cs53l32a_remove,
+ .id_table = cs53l32a_id,
+};
+
+module_i2c_driver(cs53l32a_driver);
Code Review / kvmfornfv.git / blobdiff