diff options
Diffstat (limited to 'drivers/media/video/cs53l32a.c')
| -rw-r--r-- | drivers/media/video/cs53l32a.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/drivers/media/video/cs53l32a.c b/drivers/media/video/cs53l32a.c new file mode 100644 index 0000000..c444450 --- /dev/null +++ b/drivers/media/video/cs53l32a.c @@ -0,0 +1,190 @@ +/* + * 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/ioctl.h> +#include <asm/uaccess.h> +#include <linux/i2c.h> +#include <linux/i2c-id.h> +#include <linux/videodev2.h> +#include <media/v4l2-common.h> +#include <media/v4l2-chip-ident.h> +#include <media/v4l2-i2c-drv-legacy.h> + +MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC"); +MODULE_AUTHOR("Martin Vaughan"); +MODULE_LICENSE("GPL"); + +static int debug; + +module_param(debug, bool, 0644); + +MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On"); + +static unsigned short normal_i2c[] = { 0x22 >> 1, I2C_CLIENT_END }; + +I2C_CLIENT_INSMOD; + +/* ----------------------------------------------------------------------- */ + +static int cs53l32a_write(struct i2c_client *client, u8 reg, u8 value) +{ + return i2c_smbus_write_byte_data(client, reg, value); +} + +static int cs53l32a_read(struct i2c_client *client, u8 reg) +{ + return i2c_smbus_read_byte_data(client, reg); +} + +static int cs53l32a_command(struct i2c_client *client, unsigned cmd, void *arg) +{ + struct v4l2_routing *route = arg; + struct v4l2_control *ctrl = arg; + + switch (cmd) { + case VIDIOC_INT_G_AUDIO_ROUTING: + route->input = (cs53l32a_read(client, 0x01) >> 4) & 3; + route->output = 0; + break; + + case VIDIOC_INT_S_AUDIO_ROUTING: + /* 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 (route->input > 2) { + v4l_err(client, "Invalid input %d.\n", route->input); + return -EINVAL; + } + cs53l32a_write(client, 0x01, 0x01 + (route->input << 4)); + break; + + case VIDIOC_G_CTRL: + if (ctrl->id == V4L2_CID_AUDIO_MUTE) { + ctrl->value = (cs53l32a_read(client, 0x03) & 0xc0) != 0; + break; + } + if (ctrl->id != V4L2_CID_AUDIO_VOLUME) + return -EINVAL; + ctrl->value = (s8)cs53l32a_read(client, 0x04); + break; + + case VIDIOC_S_CTRL: + if (ctrl->id == V4L2_CID_AUDIO_MUTE) { + cs53l32a_write(client, 0x03, ctrl->value ? 0xf0 : 0x30); + break; + } + if (ctrl->id != V4L2_CID_AUDIO_VOLUME) + return -EINVAL; + if (ctrl->value > 12 || ctrl->value < -96) + return -EINVAL; + cs53l32a_write(client, 0x04, (u8) ctrl->value); + cs53l32a_write(client, 0x05, (u8) ctrl->value); + break; + + case VIDIOC_G_CHIP_IDENT: + return v4l2_chip_ident_i2c_client(client, + arg, V4L2_IDENT_CS53l32A, 0); + + case VIDIOC_LOG_STATUS: + { + u8 v = cs53l32a_read(client, 0x01); + u8 m = cs53l32a_read(client, 0x03); + s8 vol = cs53l32a_read(client, 0x04); + + v4l_info(client, "Input: %d%s\n", (v >> 4) & 3, + (m & 0xC0) ? " (muted)" : ""); + v4l_info(client, "Volume: %d dB\n", vol); + break; + } + + default: + return -EINVAL; + } + return 0; +} + +/* ----------------------------------------------------------------------- */ + +/* 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) +{ + 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); + + for (i = 1; i <= 7; i++) { + u8 v = cs53l32a_read(client, i); + + v4l_dbg(1, debug, client, "Read Reg %d %02x\n", i, v); + } + + /* Set cs53l32a internal register for Adaptec 2010/2410 setup */ + + cs53l32a_write(client, 0x01, (u8) 0x21); + cs53l32a_write(client, 0x02, (u8) 0x29); + cs53l32a_write(client, 0x03, (u8) 0x30); + cs53l32a_write(client, 0x04, (u8) 0x00); + cs53l32a_write(client, 0x05, (u8) 0x00); + cs53l32a_write(client, 0x06, (u8) 0x00); + cs53l32a_write(client, 0x07, (u8) 0x00); + + /* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */ + + for (i = 1; i <= 7; i++) { + u8 v = cs53l32a_read(client, i); + + v4l_dbg(1, debug, client, "Read Reg %d %02x\n", i, v); + } + return 0; +} + +static const struct i2c_device_id cs53l32a_id[] = { + { "cs53l32a", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, cs53l32a_id); + +static struct v4l2_i2c_driver_data v4l2_i2c_data = { + .name = "cs53l32a", + .driverid = I2C_DRIVERID_CS53L32A, + .command = cs53l32a_command, + .probe = cs53l32a_probe, + .id_table = cs53l32a_id, +}; |
