184 lines
5.0 KiB
C
184 lines
5.0 KiB
C
/*
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* cs53l32a (Adaptec AVC-2010 and AVC-2410) i2c ivtv driver.
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* Copyright (C) 2005 Martin Vaughan
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*
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* Audio source switching for Adaptec AVC-2410 added by Trev Jackson
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/ioctl.h>
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#include <asm/uaccess.h>
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#include <linux/i2c.h>
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#include <linux/i2c-id.h>
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#include <linux/videodev.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-chip-ident.h>
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#include <media/v4l2-i2c-drv-legacy.h>
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MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC");
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MODULE_AUTHOR("Martin Vaughan");
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MODULE_LICENSE("GPL");
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static int debug;
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module_param(debug, bool, 0644);
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MODULE_PARM_DESC(debug, "Debugging messages\n\t\t\t0=Off (default), 1=On");
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static unsigned short normal_i2c[] = { 0x22 >> 1, I2C_CLIENT_END };
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I2C_CLIENT_INSMOD;
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/* ----------------------------------------------------------------------- */
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static int cs53l32a_write(struct i2c_client *client, u8 reg, u8 value)
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{
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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static int cs53l32a_read(struct i2c_client *client, u8 reg)
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{
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return i2c_smbus_read_byte_data(client, reg);
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}
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static int cs53l32a_command(struct i2c_client *client, unsigned cmd, void *arg)
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{
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struct v4l2_routing *route = arg;
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struct v4l2_control *ctrl = arg;
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switch (cmd) {
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case VIDIOC_INT_G_AUDIO_ROUTING:
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route->input = (cs53l32a_read(client, 0x01) >> 4) & 3;
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route->output = 0;
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break;
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case VIDIOC_INT_S_AUDIO_ROUTING:
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/* There are 2 physical inputs, but the second input can be
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placed in two modes, the first mode bypasses the PGA (gain),
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the second goes through the PGA. Hence there are three
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possible inputs to choose from. */
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if (route->input > 2) {
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v4l_err(client, "Invalid input %d.\n", route->input);
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return -EINVAL;
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}
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cs53l32a_write(client, 0x01, 0x01 + (route->input << 4));
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break;
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case VIDIOC_G_CTRL:
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if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
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ctrl->value = (cs53l32a_read(client, 0x03) & 0xc0) != 0;
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break;
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}
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if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
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return -EINVAL;
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ctrl->value = (s8)cs53l32a_read(client, 0x04);
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break;
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case VIDIOC_S_CTRL:
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if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
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cs53l32a_write(client, 0x03, ctrl->value ? 0xf0 : 0x30);
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break;
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}
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if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
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return -EINVAL;
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if (ctrl->value > 12 || ctrl->value < -96)
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return -EINVAL;
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cs53l32a_write(client, 0x04, (u8) ctrl->value);
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cs53l32a_write(client, 0x05, (u8) ctrl->value);
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break;
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case VIDIOC_G_CHIP_IDENT:
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return v4l2_chip_ident_i2c_client(client,
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arg, V4L2_IDENT_CS53l32A, 0);
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case VIDIOC_LOG_STATUS:
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{
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u8 v = cs53l32a_read(client, 0x01);
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u8 m = cs53l32a_read(client, 0x03);
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s8 vol = cs53l32a_read(client, 0x04);
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v4l_info(client, "Input: %d%s\n", (v >> 4) & 3,
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(m & 0xC0) ? " (muted)" : "");
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v4l_info(client, "Volume: %d dB\n", vol);
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break;
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}
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default:
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return -EINVAL;
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}
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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/* i2c implementation */
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/*
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* Generic i2c probe
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* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
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*/
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static int cs53l32a_probe(struct i2c_client *client)
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{
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int i;
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/* Check if the adapter supports the needed features */
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -EIO;
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snprintf(client->name, sizeof(client->name) - 1, "cs53l32a");
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v4l_info(client, "chip found @ 0x%x (%s)\n",
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client->addr << 1, client->adapter->name);
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for (i = 1; i <= 7; i++) {
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u8 v = cs53l32a_read(client, i);
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v4l_dbg(1, debug, client, "Read Reg %d %02x\n", i, v);
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}
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/* Set cs53l32a internal register for Adaptec 2010/2410 setup */
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cs53l32a_write(client, 0x01, (u8) 0x21);
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cs53l32a_write(client, 0x02, (u8) 0x29);
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cs53l32a_write(client, 0x03, (u8) 0x30);
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cs53l32a_write(client, 0x04, (u8) 0x00);
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cs53l32a_write(client, 0x05, (u8) 0x00);
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cs53l32a_write(client, 0x06, (u8) 0x00);
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cs53l32a_write(client, 0x07, (u8) 0x00);
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/* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */
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for (i = 1; i <= 7; i++) {
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u8 v = cs53l32a_read(client, i);
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v4l_dbg(1, debug, client, "Read Reg %d %02x\n", i, v);
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}
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return 0;
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}
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static struct v4l2_i2c_driver_data v4l2_i2c_data = {
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.name = "cs53l32a",
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.driverid = I2C_DRIVERID_CS53L32A,
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.command = cs53l32a_command,
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.probe = cs53l32a_probe,
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};
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