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/v4l2-common.h> 31#include <media/v4l2-chip-ident.h> 32 33MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC"); 34MODULE_AUTHOR("Martin Vaughan"); 35MODULE_LICENSE("GPL"); 36 37static int debug = 0; 38 39module_param(debug, bool, 0644); 40 41MODULE_PARM_DESC(debug, "Debugging messages\n\t\t\t0=Off (default), 1=On"); 42 43static unsigned short normal_i2c[] = { 0x22 >> 1, I2C_CLIENT_END }; 44 45 46I2C_CLIENT_INSMOD; 47 48/* ----------------------------------------------------------------------- */ 49 50static int cs53l32a_write(struct i2c_client *client, u8 reg, u8 value) 51{ 52 return i2c_smbus_write_byte_data(client, reg, value); 53} 54 55static int cs53l32a_read(struct i2c_client *client, u8 reg) 56{ 57 return i2c_smbus_read_byte_data(client, reg); 58} 59 60static int cs53l32a_command(struct i2c_client *client, unsigned int cmd, 61 void *arg) 62{ 63 struct v4l2_routing *route = arg; 64 struct v4l2_control *ctrl = arg; 65 66 switch (cmd) { 67 case VIDIOC_INT_G_AUDIO_ROUTING: 68 route->input = (cs53l32a_read(client, 0x01) >> 4) & 3; 69 route->output = 0; 70 break; 71 72 case VIDIOC_INT_S_AUDIO_ROUTING: 73 /* There are 2 physical inputs, but the second input can be 74 placed in two modes, the first mode bypasses the PGA (gain), 75 the second goes through the PGA. Hence there are three 76 possible inputs to choose from. */ 77 if (route->input > 2) { 78 v4l_err(client, "Invalid input %d.\n", route->input); 79 return -EINVAL; 80 } 81 cs53l32a_write(client, 0x01, 0x01 + (route->input << 4)); 82 break; 83 84 case VIDIOC_G_CTRL: 85 if (ctrl->id == V4L2_CID_AUDIO_MUTE) { 86 ctrl->value = (cs53l32a_read(client, 0x03) & 0xc0) != 0; 87 break; 88 } 89 if (ctrl->id != V4L2_CID_AUDIO_VOLUME) 90 return -EINVAL; 91 ctrl->value = (s8)cs53l32a_read(client, 0x04); 92 break; 93 94 case VIDIOC_S_CTRL: 95 if (ctrl->id == V4L2_CID_AUDIO_MUTE) { 96 cs53l32a_write(client, 0x03, ctrl->value ? 0xf0 : 0x30); 97 break; 98 } 99 if (ctrl->id != V4L2_CID_AUDIO_VOLUME) 100 return -EINVAL; 101 if (ctrl->value > 12 || ctrl->value < -96) 102 return -EINVAL; 103 cs53l32a_write(client, 0x04, (u8) ctrl->value); 104 cs53l32a_write(client, 0x05, (u8) ctrl->value); 105 break; 106 107 case VIDIOC_G_CHIP_IDENT: 108 return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_CS53l32A, 0); 109 110 case VIDIOC_LOG_STATUS: 111 { 112 u8 v = cs53l32a_read(client, 0x01); 113 u8 m = cs53l32a_read(client, 0x03); 114 s8 vol = cs53l32a_read(client, 0x04); 115 116 v4l_info(client, "Input: %d%s\n", (v >> 4) & 3, 117 (m & 0xC0) ? " (muted)" : ""); 118 v4l_info(client, "Volume: %d dB\n", vol); 119 break; 120 } 121 122 default: 123 return -EINVAL; 124 } 125 return 0; 126} 127 128/* ----------------------------------------------------------------------- */ 129 130/* i2c implementation */ 131 132/* 133 * Generic i2c probe 134 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' 135 */ 136 137static struct i2c_driver i2c_driver; 138 139static int cs53l32a_attach(struct i2c_adapter *adapter, int address, int kind) 140{ 141 struct i2c_client *client; 142 int i; 143 144 /* Check if the adapter supports the needed features */ 145 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 146 return 0; 147 148 client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); 149 if (client == 0) 150 return -ENOMEM; 151 152 client->addr = address; 153 client->adapter = adapter; 154 client->driver = &i2c_driver; 155 snprintf(client->name, sizeof(client->name) - 1, "cs53l32a"); 156 157 v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name); 158 159 for (i = 1; i <= 7; i++) { 160 u8 v = cs53l32a_read(client, i); 161 162 v4l_dbg(1, debug, client, "Read Reg %d %02x\n", i, v); 163 } 164 165 /* Set cs53l32a internal register for Adaptec 2010/2410 setup */ 166 167 cs53l32a_write(client, 0x01, (u8) 0x21); 168 cs53l32a_write(client, 0x02, (u8) 0x29); 169 cs53l32a_write(client, 0x03, (u8) 0x30); 170 cs53l32a_write(client, 0x04, (u8) 0x00); 171 cs53l32a_write(client, 0x05, (u8) 0x00); 172 cs53l32a_write(client, 0x06, (u8) 0x00); 173 cs53l32a_write(client, 0x07, (u8) 0x00); 174 175 /* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */ 176 177 for (i = 1; i <= 7; i++) { 178 u8 v = cs53l32a_read(client, i); 179 180 v4l_dbg(1, debug, client, "Read Reg %d %02x\n", i, v); 181 } 182 183 i2c_attach_client(client); 184 185 return 0; 186} 187 188static int cs53l32a_probe(struct i2c_adapter *adapter) 189{ 190 if (adapter->class & I2C_CLASS_TV_ANALOG) 191 return i2c_probe(adapter, &addr_data, cs53l32a_attach); 192 return 0; 193} 194 195static int cs53l32a_detach(struct i2c_client *client) 196{ 197 int err; 198 199 err = i2c_detach_client(client); 200 if (err) { 201 return err; 202 } 203 kfree(client); 204 205 return 0; 206} 207 208/* ----------------------------------------------------------------------- */ 209 210/* i2c implementation */ 211static struct i2c_driver i2c_driver = { 212 .driver = { 213 .name = "cs53l32a", 214 }, 215 .id = I2C_DRIVERID_CS53L32A, 216 .attach_adapter = cs53l32a_probe, 217 .detach_client = cs53l32a_detach, 218 .command = cs53l32a_command, 219}; 220 221 222static int __init cs53l32a_init_module(void) 223{ 224 return i2c_add_driver(&i2c_driver); 225} 226 227static void __exit cs53l32a_cleanup_module(void) 228{ 229 i2c_del_driver(&i2c_driver); 230} 231 232module_init(cs53l32a_init_module); 233module_exit(cs53l32a_cleanup_module); 234