diff options
Diffstat (limited to 'drivers/media/video/cs53l32a.c')
| -rw-r--r-- | drivers/media/video/cs53l32a.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/drivers/media/video/cs53l32a.c b/drivers/media/video/cs53l32a.c new file mode 100644 index 000000000000..7434e5e66d59 --- /dev/null +++ b/drivers/media/video/cs53l32a.c @@ -0,0 +1,234 @@ +/* + * 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/videodev.h> +#include <media/audiochip.h> +#include <media/id.h> + +MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC"); +MODULE_AUTHOR("Martin Vaughan"); +MODULE_LICENSE("GPL"); + +static int debug = 0; + +module_param(debug, bool, 0644); + +MODULE_PARM_DESC(debug, "Debugging messages\n\t\t\t0=Off (default), 1=On"); + +#define cs53l32a_dbg(fmt, arg...) \ + do { \ + if (debug) \ + printk(KERN_INFO "%s debug %d-%04x: " fmt, client->driver->name, \ + i2c_adapter_id(client->adapter), client->addr , ## arg); \ + } while (0) + +#define cs53l32a_err(fmt, arg...) do { \ + printk(KERN_ERR "%s %d-%04x: " fmt, client->driver->name, \ + i2c_adapter_id(client->adapter), client->addr , ## arg); } while (0) +#define cs53l32a_info(fmt, arg...) do { \ + printk(KERN_INFO "%s %d-%04x: " fmt, client->driver->name, \ + i2c_adapter_id(client->adapter), client->addr , ## arg); } while (0) + +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 int cmd, + void *arg) +{ + int *input = arg; + + switch (cmd) { + case AUDC_SET_INPUT: + switch (*input) { + case AUDIO_TUNER: + cs53l32a_write(client, 0x01, 0x01); + break; + case AUDIO_EXTERN: + cs53l32a_write(client, 0x01, 0x21); + break; + case AUDIO_MUTE: + cs53l32a_write(client, 0x03, 0xF0); + break; + case AUDIO_UNMUTE: + cs53l32a_write(client, 0x03, 0x30); + break; + default: + cs53l32a_err("Invalid input %d.\n", *input); + return -EINVAL; + } + break; + + case VIDIOC_S_CTRL: + { + struct v4l2_control *ctrl = arg; + + if (ctrl->id != V4L2_CID_AUDIO_VOLUME) + return -EINVAL; + if (ctrl->value > 12 || ctrl->value < -90) + return -EINVAL; + cs53l32a_write(client, 0x04, (u8) ctrl->value); + cs53l32a_write(client, 0x05, (u8) ctrl->value); + break; + } + + case VIDIOC_LOG_STATUS: + { + u8 v = cs53l32a_read(client, 0x01); + u8 m = cs53l32a_read(client, 0x03); + + cs53l32a_info("Input: %s%s\n", + v == 0x21 ? "external line in" : "tuner", + (m & 0xC0) ? " (muted)" : ""); + 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 struct i2c_driver i2c_driver; + +static int cs53l32a_attach(struct i2c_adapter *adapter, int address, int kind) +{ + struct i2c_client *client; + int i; + + /* Check if the adapter supports the needed features */ + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return 0; + + client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL); + if (client == 0) + return -ENOMEM; + + memset(client, 0, sizeof(struct i2c_client)); + client->addr = address; + client->adapter = adapter; + client->driver = &i2c_driver; + client->flags = I2C_CLIENT_ALLOW_USE; + snprintf(client->name, sizeof(client->name) - 1, "cs53l32a"); + + cs53l32a_info("chip found @ 0x%x (%s)\n", address << 1, adapter->name); + + for (i = 1; i <= 7; i++) { + u8 v = cs53l32a_read(client, i); + + cs53l32a_dbg("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); + + cs53l32a_dbg("Read Reg %d %02x\n", i, v); + } + + i2c_attach_client(client); + + return 0; +} + +static int cs53l32a_probe(struct i2c_adapter *adapter) +{ + return i2c_probe(adapter, &addr_data, cs53l32a_attach); +} + +static int cs53l32a_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 = { + .name = "cs53l32a", + .id = I2C_DRIVERID_CS53L32A, + .flags = I2C_DF_NOTIFY, + .attach_adapter = cs53l32a_probe, + .detach_client = cs53l32a_detach, + .command = cs53l32a_command, + .owner = THIS_MODULE, +}; + + +static int __init cs53l32a_init_module(void) +{ + return i2c_add_driver(&i2c_driver); +} + +static void __exit cs53l32a_cleanup_module(void) +{ + i2c_del_driver(&i2c_driver); +} + +module_init(cs53l32a_init_module); +module_exit(cs53l32a_cleanup_module); |