drivers/media/video/cs53l32a.c

   1 /*
   2  * cs53l32a (Adaptec AVC-2010 and AVC-2410) i2c ivtv driver.
   3  * Copyright (C) 2005  Martin Vaughan
   4  *
   5  * Audio source switching for Adaptec AVC-2410 added by Trev Jackson
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22
  23 #include <linux/module.h>
  24 #include <linux/types.h>
  25 #include <linux/ioctl.h>
  26 #include <asm/uaccess.h>
  27 #include <linux/i2c.h>
  28 #include <linux/i2c-id.h>
  29 #include <linux/videodev.h>
  30 #include <media/audiochip.h>
  31
  32 MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC");
  33 MODULE_AUTHOR("Martin Vaughan");
  34 MODULE_LICENSE("GPL");
  35
  36 static int debug = 0;
  37
  38 module_param(debug, bool, 0644);
  39
  40 MODULE_PARM_DESC(debug, "Debugging messages\n\t\t\t0=Off (default), 1=On");
  41
  42 #define cs53l32a_dbg(fmt, arg...) \
  43         do { \
  44                 if (debug) \
  45                         printk(KERN_INFO "%s debug %d-%04x: " fmt, \
  46                                client->driver->driver.name, \
  47                                i2c_adapter_id(client->adapter), client->addr , ## arg); \
  48         } while (0)
  49
  50 #define cs53l32a_err(fmt, arg...) do { \
  51         printk(KERN_ERR "%s %d-%04x: " fmt, client->driver->driver.name, \
  52                 i2c_adapter_id(client->adapter), client->addr , ## arg); } while (0)
  53 #define cs53l32a_info(fmt, arg...) do { \
  54         printk(KERN_INFO "%s %d-%04x: " fmt, client->driver->driver.name, \
  55                 i2c_adapter_id(client->adapter), client->addr , ## arg); } while (0)
  56
  57 static unsigned short normal_i2c[] = { 0x22 >> 1, I2C_CLIENT_END };
  58
  59
  60 I2C_CLIENT_INSMOD;
  61
  62 /* ----------------------------------------------------------------------- */
  63
  64 static int cs53l32a_write(struct i2c_client *client, u8 reg, u8 value)
  65 {
  66         return i2c_smbus_write_byte_data(client, reg, value);
  67 }
  68
  69 static int cs53l32a_read(struct i2c_client *client, u8 reg)
  70 {
  71         return i2c_smbus_read_byte_data(client, reg);
  72 }
  73
  74 static int cs53l32a_command(struct i2c_client *client, unsigned int cmd,
  75                             void *arg)
  76 {
  77         int *input = arg;
  78
  79         switch (cmd) {
  80         case AUDC_SET_INPUT:
  81                 switch (*input) {
  82                 case AUDIO_TUNER:
  83                         cs53l32a_write(client, 0x01, 0x01);
  84                         break;
  85                 case AUDIO_EXTERN:
  86                         cs53l32a_write(client, 0x01, 0x21);
  87                         break;
  88                 case AUDIO_MUTE:
  89                         cs53l32a_write(client, 0x03, 0xF0);
  90                         break;
  91                 case AUDIO_UNMUTE:
  92                         cs53l32a_write(client, 0x03, 0x30);
  93                         break;
  94                 default:
  95                         cs53l32a_err("Invalid input %d.\n", *input);
  96                         return -EINVAL;
  97                 }
  98                 break;
  99
 100         case VIDIOC_S_CTRL:
 101                 {
 102                         struct v4l2_control *ctrl = arg;
 103
 104                         if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
 105                                 return -EINVAL;
 106                         if (ctrl->value > 12 || ctrl->value < -90)
 107                                 return -EINVAL;
 108                         cs53l32a_write(client, 0x04, (u8) ctrl->value);
 109                         cs53l32a_write(client, 0x05, (u8) ctrl->value);
 110                         break;
 111                 }
 112
 113         case VIDIOC_LOG_STATUS:
 114                 {
 115                         u8 v = cs53l32a_read(client, 0x01);
 116                         u8 m = cs53l32a_read(client, 0x03);
 117
 118                         cs53l32a_info("Input: %s%s\n",
 119                                       v == 0x21 ? "external line in" : "tuner",
 120                                       (m & 0xC0) ? " (muted)" : "");
 121                         break;
 122                 }
 123
 124         default:
 125                 return -EINVAL;
 126         }
 127         return 0;
 128 }
 129
 130 /* ----------------------------------------------------------------------- */
 131
 132 /* i2c implementation */
 133
 134 /*
 135  * Generic i2c probe
 136  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 137  */
 138
 139 static struct i2c_driver i2c_driver;
 140
 141 static int cs53l32a_attach(struct i2c_adapter *adapter, int address, int kind)
 142 {
 143         struct i2c_client *client;
 144         int i;
 145
 146         /* Check if the adapter supports the needed features */
 147         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 148                 return 0;
 149
 150         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
 151         if (client == 0)
 152                 return -ENOMEM;
 153
 154         memset(client, 0, sizeof(struct i2c_client));
 155         client->addr = address;
 156         client->adapter = adapter;
 157         client->driver = &i2c_driver;
 158         snprintf(client->name, sizeof(client->name) - 1, "cs53l32a");
 159
 160         cs53l32a_info("chip found @ 0x%x (%s)\n", address << 1, adapter->name);
 161
 162         for (i = 1; i <= 7; i++) {
 163                 u8 v = cs53l32a_read(client, i);
 164
 165                 cs53l32a_dbg("Read Reg %d %02x\n", i, v);
 166         }
 167
 168         /* Set cs53l32a internal register for Adaptec 2010/2410 setup */
 169
 170         cs53l32a_write(client, 0x01, (u8) 0x21);
 171         cs53l32a_write(client, 0x02, (u8) 0x29);
 172         cs53l32a_write(client, 0x03, (u8) 0x30);
 173         cs53l32a_write(client, 0x04, (u8) 0x00);
 174         cs53l32a_write(client, 0x05, (u8) 0x00);
 175         cs53l32a_write(client, 0x06, (u8) 0x00);
 176         cs53l32a_write(client, 0x07, (u8) 0x00);
 177
 178         /* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */
 179
 180         for (i = 1; i <= 7; i++) {
 181                 u8 v = cs53l32a_read(client, i);
 182
 183                 cs53l32a_dbg("Read Reg %d %02x\n", i, v);
 184         }
 185
 186         i2c_attach_client(client);
 187
 188         return 0;
 189 }
 190
 191 static int cs53l32a_probe(struct i2c_adapter *adapter)
 192 {
 193 #ifdef I2C_CLASS_TV_ANALOG
 194         if (adapter->class & I2C_CLASS_TV_ANALOG)
 195 #else
 196         if (adapter->id == I2C_HW_B_BT848)
 197 #endif
 198                 return i2c_probe(adapter, &addr_data, cs53l32a_attach);
 199         return 0;
 200 }
 201
 202 static int cs53l32a_detach(struct i2c_client *client)
 203 {
 204         int err;
 205
 206         err = i2c_detach_client(client);
 207         if (err) {
 208                 return err;
 209         }
 210         kfree(client);
 211
 212         return 0;
 213 }
 214
 215 /* ----------------------------------------------------------------------- */
 216
 217 /* i2c implementation */
 218 static struct i2c_driver i2c_driver = {
 219         .driver = {
 220                 .owner = THIS_MODULE,
 221                 .name = "cs53l32a",
 222         },
 223         .id = I2C_DRIVERID_CS53L32A,
 224         .attach_adapter = cs53l32a_probe,
 225         .detach_client = cs53l32a_detach,
 226         .command = cs53l32a_command,
 227 };
 228
 229
 230 static int __init cs53l32a_init_module(void)
 231 {
 232         return i2c_add_driver(&i2c_driver);
 233 }
 234
 235 static void __exit cs53l32a_cleanup_module(void)
 236 {
 237         i2c_del_driver(&i2c_driver);
 238 }
 239
 240 module_init(cs53l32a_init_module);
 241 module_exit(cs53l32a_cleanup_module);