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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 | /* * for the TEA6300 chip (only found on Gateway STB TV/FM cards tho the best * of my knowledge) * WARNING: THIS DRIVER WILL LOAD WITHOUT COMPLAINTS EVEN IF THE WRONG * CHIP (i.e., an MSP3400) IS ON I2C ADDRESS 0x80 (it relies on i2c to * make sure that there is a device acknowledging that address). This * is a potential problem because the MSP3400 is very popular and does * use this address! You have been warned! * * Copyright (c) 1998 Greg Alexander <galexand@acm.org> * This code is placed under the terms of the GNU General Public License * Code liberally copied from msp3400.c, which is by Gerd Knorr * * All of this should work, though it would be nice to eventually support * balance (different left,right values) and, if someone ever finds a card * with the support (or if you're careful with a soldering iron), fade * (front/back). */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/string.h> #include <linux/timer.h> #include <linux/delay.h> #include <linux/errno.h> #include <linux/malloc.h> #include <linux/videodev.h> #include <linux/i2c.h> #include <linux/i2c-algo-bit.h> #include "bttv.h" #include "audiochip.h" /* Addresses to scan */ #define I2C_TEA6300 0x80 static unsigned short normal_i2c[] = { I2C_TEA6300 >> 1, I2C_CLIENT_END}; static unsigned short normal_i2c_range[] = {I2C_CLIENT_END}; static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END }; static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END }; static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END }; static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END }; static unsigned short force[2] = { I2C_CLIENT_END, I2C_CLIENT_END }; static struct i2c_client_address_data addr_data = { normal_i2c, normal_i2c_range, probe, probe_range, ignore, ignore_range, force }; MODULE_PARM(debug,"i"); static int debug = 0; /* insmod parameter */ #define dprintk if (debug) printk struct tea6300 { int mode; /* set to AUDIO_{OFF,TUNER,RADIO,EXTERN} */ int stereo; __u16 left,right; __u16 bass,treble; }; static struct i2c_driver driver; static struct i2c_client client_template; #define TEA6300_VL 0x00 /* volume left */ #define TEA6300_VR 0x01 /* volume right */ #define TEA6300_BA 0x02 /* bass */ #define TEA6300_TR 0x03 /* treble */ #define TEA6300_FA 0x04 /* fader control */ #define TEA6300_S 0x05 /* switch register */ /* values for those registers: */ #define TEA6300_S_SA 0x01 /* stereo A input */ #define TEA6300_S_SB 0x02 /* stereo B */ #define TEA6300_S_SC 0x04 /* stereo C */ #define TEA6300_S_GMU 0x80 /* general mute */ /* ******************************** * * functions for talking to TEA6300 * * ******************************** */ static int tea6300_write(struct i2c_client *client, int addr, int val) { unsigned char buffer[2]; buffer[0] = addr; buffer[1] = val; if (2 != i2c_master_send(client,buffer,2)) { printk(KERN_WARNING "tea6300: I/O error, trying (write %d 0x%x)\n", addr, val); return -1; } return 0; } static void tea6300_set(struct i2c_client *client) { struct tea6300 *tea = client->data; /* mode is ignored today */ dprintk(KERN_DEBUG "tea6300_set(%04x,%04x,%04x,%04x)\n",tea->left>>10,tea->right>>10,tea->bass>>12,tea->treble>>12); tea6300_write(client, TEA6300_VL, tea->left>>10 ); tea6300_write(client, TEA6300_VR, tea->right>>10 ); tea6300_write(client, TEA6300_BA, tea->bass>>12 ); tea6300_write(client, TEA6300_TR, tea->treble>>12); } static void do_tea6300_init(struct i2c_client *client) { struct tea6300 *tea = client->data; tea->left=tea->right =49152; /* -10dB (loud enough, but not beyond normal line levels - so as to avoid clipping */ tea->bass=tea->treble=28672; /* 0dB */ tea->mode=AUDIO_OFF; tea->stereo=1; /* left=right=0x27<<10, bass=treble=0x07<<12 */ tea6300_write(client, TEA6300_FA, 0x3f ); /* fader off */ tea6300_write(client, TEA6300_S , TEA6300_S_GMU); /* mute */ tea6300_set(client); } static void tea6300_audio(struct i2c_client *client, int mode) { struct tea6300 *tea = client->data; /* valid for AUDIO_TUNER, RADIO, EXTERN, OFF */ dprintk(KERN_DEBUG "tea6300_audio:%d (T,R,E,I,O)\n",mode); tea->mode=mode; if (mode==AUDIO_OFF) { /* just mute it */ tea6300_write(client, TEA6300_S, TEA6300_S_GMU); return; } switch(mode) { case AUDIO_TUNER: tea6300_write(client, TEA6300_S, TEA6300_S_SA); break; case AUDIO_RADIO: tea6300_write(client, TEA6300_S, TEA6300_S_SB); break; case AUDIO_EXTERN: tea6300_write(client, TEA6300_S, TEA6300_S_SC); break; } } /* *********************** * * i2c interface functions * * *********************** */ static int tea6300_attach(struct i2c_adapter *adap, int addr, unsigned short flags, int kind) { struct tea6300 *tea; struct i2c_client *client; client = kmalloc(sizeof *client,GFP_KERNEL); if (!client) return -ENOMEM; memcpy(client,&client_template,sizeof(struct i2c_client)); client->adapter = adap; client->addr = addr; client->data = tea = kmalloc(sizeof *tea,GFP_KERNEL); if (!tea) return -ENOMEM; memset(tea,0,sizeof *tea); do_tea6300_init(client); MOD_INC_USE_COUNT; strcpy(client->name,"TEA6300T"); printk(KERN_INFO "tea6300: initialized\n"); i2c_attach_client(client); return 0; } static int tea6300_probe(struct i2c_adapter *adap) { if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848)) return i2c_probe(adap, &addr_data, tea6300_attach); return 0; } static int tea6300_detach(struct i2c_client *client) { struct tea6300 *tea = client->data; do_tea6300_init(client); i2c_detach_client(client); kfree(tea); kfree(client); MOD_DEC_USE_COUNT; return 0; } static int tea6300_command(struct i2c_client *client, unsigned int cmd, void *arg) { struct tea6300 *tea = client->data; __u16 *sarg = arg; switch (cmd) { case AUDC_SET_RADIO: tea6300_audio(client,AUDIO_RADIO); break; case AUDC_SET_INPUT: tea6300_audio(client,*sarg); break; /* --- v4l ioctls --- */ /* take care: bttv does userspace copying, we'll get a kernel pointer here... */ case VIDIOCGAUDIO: { struct video_audio *va = arg; va->flags |= VIDEO_AUDIO_VOLUME | VIDEO_AUDIO_BASS | VIDEO_AUDIO_TREBLE; va->volume=MAX(tea->left,tea->right); va->balance=(32768*MIN(tea->left,tea->right))/ (va->volume ? va->volume : 1); va->balance=(tea->left<tea->right)? (65535-va->balance) : va->balance; va->bass = tea->bass; va->treble = tea->treble; break; } case VIDIOCSAUDIO: { struct video_audio *va = arg; tea->left = (MIN(65536 - va->balance,32768) * va->volume) / 32768; tea->right = (MIN(va->balance,32768) * va->volume) / 32768; tea->bass = va->bass; tea->treble = va->treble; tea6300_set(client); break; } #if 0 /* --- old, obsolete interface --- */ case AUDC_GET_VOLUME_LEFT: *sarg = tea->left; break; case AUDC_GET_VOLUME_RIGHT: *sarg = tea->right; break; case AUDC_SET_VOLUME_LEFT: tea->left = *sarg; tea6300_set(client); break; case AUDC_SET_VOLUME_RIGHT: tea->right = *sarg; tea6300_set(client); break; case AUDC_GET_BASS: *sarg = tea->bass; break; case AUDC_SET_BASS: tea->bass = *sarg; tea6300_set(client); break; case AUDC_GET_TREBLE: *sarg = tea->treble; break; case AUDC_SET_TREBLE: tea->treble = *sarg; tea6300_set(client); break; case AUDC_GET_STEREO: *sarg = tea->stereo?VIDEO_SOUND_STEREO:VIDEO_SOUND_MONO; break; case AUDC_SET_STEREO: tea->stereo=(*sarg==VIDEO_SOUND_MONO)?0:1; /* TODO: make this write to the TDA9850? */ break; /* case AUDC_SWITCH_MUTE: someday, maybe -- not a lot of point to case AUDC_NEWCHANNEL: it and it would require preserving state case AUDC_GET_DC: huh?? (not used by bttv.c) */ #endif default: /* nothing */ } return 0; } static struct i2c_driver driver = { "i2c tea6300 driver", I2C_DRIVERID_TEA6300, I2C_DF_NOTIFY, tea6300_probe, tea6300_detach, tea6300_command, }; static struct i2c_client client_template = { "(unset)", /* name */ -1, 0, 0, NULL, &driver }; #ifdef MODULE int init_module(void) #else int tea6300_init(void) #endif { i2c_add_driver(&driver); return 0; } #ifdef MODULE void cleanup_module(void) { i2c_del_driver(&driver); } #endif /* * Local variables: * c-basic-offset: 8 * End: */ |