Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | tda9840 - i2c-driver for the tda9840 by SGS Thomson |
| 3 | |
| 4 | Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de> |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 5 | Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | |
| 7 | The tda9840 is a stereo/dual sound processor with digital |
| 8 | identification. It can be found at address 0x84 on the i2c-bus. |
| 9 | |
| 10 | For detailed informations download the specifications directly |
| 11 | from SGS Thomson at http://www.st.com |
| 12 | |
| 13 | This program is free software; you can redistribute it and/or modify |
| 14 | it under the terms of the GNU General Public License as published by |
| 15 | the Free Software Foundation; either version 2 of the License, or |
| 16 | (at your option) any later version. |
| 17 | |
| 18 | This program is distributed in the hope that it will be useful, |
| 19 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | GNU General Public License for more details. |
| 22 | |
| 23 | You should have received a copy of the GNU General Public License |
| 24 | along with this program; if not, write to the Free Software |
| 25 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 26 | */ |
| 27 | |
Mauro Carvalho Chehab | a8733ca | 2006-03-17 10:37:02 -0300 | [diff] [blame] | 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/module.h> |
| 30 | #include <linux/ioctl.h> |
| 31 | #include <linux/i2c.h> |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 32 | #include <media/v4l2-device.h> |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 33 | #include <media/v4l2-i2c-drv-legacy.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include "tda9840.h" |
| 35 | |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 36 | MODULE_AUTHOR("Michael Hunold <michael@mihu.de>"); |
| 37 | MODULE_DESCRIPTION("tda9840 driver"); |
| 38 | MODULE_LICENSE("GPL"); |
Hans Verkuil | f87086e | 2008-07-18 00:50:58 -0300 | [diff] [blame] | 39 | |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 40 | static int debug; |
| 41 | module_param(debug, int, 0644); |
| 42 | |
| 43 | MODULE_PARM_DESC(debug, "Debug level (0-1)"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
| 45 | #define SWITCH 0x00 |
| 46 | #define LEVEL_ADJUST 0x02 |
| 47 | #define STEREO_ADJUST 0x03 |
| 48 | #define TEST 0x04 |
| 49 | |
Hans Verkuil | 707ecf4 | 2008-09-06 15:40:25 -0300 | [diff] [blame] | 50 | #define TDA9840_SET_MUTE 0x00 |
| 51 | #define TDA9840_SET_MONO 0x10 |
| 52 | #define TDA9840_SET_STEREO 0x2a |
| 53 | #define TDA9840_SET_LANG1 0x12 |
| 54 | #define TDA9840_SET_LANG2 0x1e |
| 55 | #define TDA9840_SET_BOTH 0x1a |
| 56 | #define TDA9840_SET_BOTH_R 0x16 |
| 57 | #define TDA9840_SET_EXTERNAL 0x7a |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | /* addresses to scan, found only at 0x42 (7-Bit) */ |
Mauro Carvalho Chehab | 09df1c1 | 2006-03-18 08:31:34 -0300 | [diff] [blame] | 60 | static unsigned short normal_i2c[] = { I2C_ADDR_TDA9840, I2C_CLIENT_END }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
| 62 | /* magic definition of all other variables and things */ |
| 63 | I2C_CLIENT_INSMOD; |
| 64 | |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 65 | static void tda9840_write(struct v4l2_subdev *sd, u8 reg, u8 val) |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 66 | { |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 67 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 68 | |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 69 | if (i2c_smbus_write_byte_data(client, reg, val)) |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 70 | v4l2_dbg(1, debug, sd, "error writing %02x to %02x\n", |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 71 | val, reg); |
| 72 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 74 | static int tda9840_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | { |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 76 | int byte; |
| 77 | |
| 78 | if (t->index) |
| 79 | return -EINVAL; |
| 80 | |
| 81 | switch (t->audmode) { |
| 82 | case V4L2_TUNER_MODE_STEREO: |
| 83 | byte = TDA9840_SET_STEREO; |
| 84 | break; |
| 85 | case V4L2_TUNER_MODE_LANG1_LANG2: |
| 86 | byte = TDA9840_SET_BOTH; |
| 87 | break; |
| 88 | case V4L2_TUNER_MODE_LANG1: |
| 89 | byte = TDA9840_SET_LANG1; |
| 90 | break; |
| 91 | case V4L2_TUNER_MODE_LANG2: |
| 92 | byte = TDA9840_SET_LANG2; |
| 93 | break; |
| 94 | default: |
| 95 | byte = TDA9840_SET_MONO; |
| 96 | break; |
| 97 | } |
| 98 | v4l2_dbg(1, debug, sd, "TDA9840_SWITCH: 0x%02x\n", byte); |
| 99 | tda9840_write(sd, SWITCH, byte); |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | static int tda9840_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *t) |
| 104 | { |
| 105 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
| 106 | u8 byte; |
| 107 | |
| 108 | t->rxsubchans = V4L2_TUNER_SUB_MONO; |
| 109 | if (1 != i2c_master_recv(client, &byte, 1)) { |
| 110 | v4l2_dbg(1, debug, sd, |
| 111 | "i2c_master_recv() failed\n"); |
| 112 | return -EIO; |
| 113 | } |
| 114 | |
| 115 | if (byte & 0x80) { |
| 116 | v4l2_dbg(1, debug, sd, |
| 117 | "TDA9840_DETECT: register contents invalid\n"); |
| 118 | return -EINVAL; |
| 119 | } |
| 120 | |
| 121 | v4l2_dbg(1, debug, sd, "TDA9840_DETECT: byte: 0x%02x\n", byte); |
| 122 | |
| 123 | switch (byte & 0x60) { |
| 124 | case 0x00: |
| 125 | t->rxsubchans = V4L2_TUNER_SUB_MONO; |
| 126 | break; |
| 127 | case 0x20: |
| 128 | t->rxsubchans = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2; |
| 129 | break; |
| 130 | case 0x40: |
| 131 | t->rxsubchans = V4L2_TUNER_SUB_STEREO | V4L2_TUNER_SUB_MONO; |
| 132 | break; |
| 133 | default: /* Incorrect detect */ |
| 134 | t->rxsubchans = V4L2_TUNER_MODE_MONO; |
| 135 | break; |
| 136 | } |
| 137 | return 0; |
| 138 | } |
| 139 | |
Hans Verkuil | 069b747 | 2008-12-30 07:04:34 -0300 | [diff] [blame] | 140 | static long tda9840_ioctl(struct v4l2_subdev *sd, unsigned cmd, void *arg) |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 141 | { |
| 142 | int byte; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
| 144 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | case TDA9840_LEVEL_ADJUST: |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 146 | byte = *(int *)arg; |
| 147 | v4l2_dbg(1, debug, sd, "TDA9840_LEVEL_ADJUST: %d\n", byte); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
| 149 | /* check for correct range */ |
| 150 | if (byte > 25 || byte < -20) |
| 151 | return -EINVAL; |
| 152 | |
| 153 | /* calculate actual value to set, see specs, page 18 */ |
| 154 | byte /= 5; |
| 155 | if (0 < byte) |
| 156 | byte += 0x8; |
| 157 | else |
| 158 | byte = -byte; |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 159 | tda9840_write(sd, LEVEL_ADJUST, byte); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | break; |
| 161 | |
| 162 | case TDA9840_STEREO_ADJUST: |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 163 | byte = *(int *)arg; |
| 164 | v4l2_dbg(1, debug, sd, "TDA9840_STEREO_ADJUST: %d\n", byte); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
| 166 | /* check for correct range */ |
| 167 | if (byte > 25 || byte < -24) |
| 168 | return -EINVAL; |
| 169 | |
| 170 | /* calculate actual value to set */ |
| 171 | byte /= 5; |
| 172 | if (0 < byte) |
| 173 | byte += 0x20; |
| 174 | else |
| 175 | byte = -byte; |
| 176 | |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 177 | tda9840_write(sd, STEREO_ADJUST, byte); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | default: |
| 180 | return -ENOIOCTLCMD; |
| 181 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | return 0; |
| 183 | } |
| 184 | |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 185 | static int tda9840_command(struct i2c_client *client, unsigned cmd, void *arg) |
| 186 | { |
| 187 | return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg); |
| 188 | } |
| 189 | |
| 190 | /* ----------------------------------------------------------------------- */ |
| 191 | |
| 192 | static const struct v4l2_subdev_core_ops tda9840_core_ops = { |
| 193 | .ioctl = tda9840_ioctl, |
| 194 | }; |
| 195 | |
| 196 | static const struct v4l2_subdev_tuner_ops tda9840_tuner_ops = { |
| 197 | .s_tuner = tda9840_s_tuner, |
| 198 | .g_tuner = tda9840_g_tuner, |
| 199 | }; |
| 200 | |
| 201 | static const struct v4l2_subdev_ops tda9840_ops = { |
| 202 | .core = &tda9840_core_ops, |
| 203 | .tuner = &tda9840_tuner_ops, |
| 204 | }; |
| 205 | |
| 206 | /* ----------------------------------------------------------------------- */ |
| 207 | |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 208 | static int tda9840_probe(struct i2c_client *client, |
| 209 | const struct i2c_device_id *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | { |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 211 | struct v4l2_subdev *sd; |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 212 | int result; |
| 213 | int byte; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | |
| 215 | /* let's see whether this adapter can support what we need */ |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 216 | if (!i2c_check_functionality(client->adapter, |
| 217 | I2C_FUNC_SMBUS_READ_BYTE_DATA | |
| 218 | I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 219 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 221 | v4l_info(client, "chip found @ 0x%x (%s)\n", |
| 222 | client->addr << 1, client->adapter->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 224 | sd = kmalloc(sizeof(struct v4l2_subdev), GFP_KERNEL); |
| 225 | if (sd == NULL) |
| 226 | return -ENOMEM; |
| 227 | v4l2_i2c_subdev_init(sd, client, &tda9840_ops); |
| 228 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | /* set initial values for level & stereo - adjustment, mode */ |
| 230 | byte = 0; |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 231 | result = tda9840_ioctl(sd, TDA9840_LEVEL_ADJUST, &byte); |
| 232 | result |= tda9840_ioctl(sd, TDA9840_STEREO_ADJUST, &byte); |
| 233 | tda9840_write(sd, SWITCH, TDA9840_SET_STEREO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | if (result) { |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 235 | v4l2_dbg(1, debug, sd, "could not initialize tda9840\n"); |
| 236 | kfree(sd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | return -ENODEV; |
| 238 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | return 0; |
| 240 | } |
| 241 | |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 242 | static int tda9840_remove(struct i2c_client *client) |
| 243 | { |
| 244 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
| 245 | |
| 246 | v4l2_device_unregister_subdev(sd); |
| 247 | kfree(sd); |
| 248 | return 0; |
| 249 | } |
| 250 | |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 251 | static int tda9840_legacy_probe(struct i2c_adapter *adapter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | { |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 253 | /* Let's see whether this is a known adapter we can attach to. |
| 254 | Prevents conflicts with tvaudio.c. */ |
| 255 | return adapter->id == I2C_HW_SAA7146; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | } |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 257 | static const struct i2c_device_id tda9840_id[] = { |
| 258 | { "tda9840", 0 }, |
| 259 | { } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | }; |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 261 | MODULE_DEVICE_TABLE(i2c, tda9840_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 263 | static struct v4l2_i2c_driver_data v4l2_i2c_data = { |
Jean Delvare | fae91e7 | 2005-08-15 19:57:04 +0200 | [diff] [blame] | 264 | .name = "tda9840", |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 265 | .driverid = I2C_DRIVERID_TDA9840, |
| 266 | .command = tda9840_command, |
| 267 | .probe = tda9840_probe, |
Hans Verkuil | 973909e | 2008-12-18 13:21:57 -0300 | [diff] [blame] | 268 | .remove = tda9840_remove, |
Hans Verkuil | a832781 | 2008-07-25 10:31:23 -0300 | [diff] [blame] | 269 | .legacy_probe = tda9840_legacy_probe, |
| 270 | .id_table = tda9840_id, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | }; |