Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * $Id: tuner-core.c,v 1.5 2005/02/15 15:59:35 kraxel Exp $ |
| 3 | * |
| 4 | * i2c tv tuner chip device driver |
| 5 | * core core, i.e. kernel interfaces, registering and so on |
| 6 | */ |
| 7 | |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/moduleparam.h> |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/sched.h> |
| 12 | #include <linux/string.h> |
| 13 | #include <linux/timer.h> |
| 14 | #include <linux/delay.h> |
| 15 | #include <linux/errno.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/poll.h> |
| 18 | #include <linux/i2c.h> |
| 19 | #include <linux/types.h> |
| 20 | #include <linux/videodev.h> |
| 21 | #include <linux/init.h> |
| 22 | |
| 23 | #include <media/tuner.h> |
| 24 | #include <media/audiochip.h> |
| 25 | |
| 26 | #define UNSET (-1U) |
| 27 | |
| 28 | /* standard i2c insmod options */ |
| 29 | static unsigned short normal_i2c[] = { |
| 30 | 0x4b, /* tda8290 */ |
| 31 | I2C_CLIENT_END |
| 32 | }; |
| 33 | static unsigned short normal_i2c_range[] = { |
| 34 | 0x60, 0x6f, |
| 35 | I2C_CLIENT_END |
| 36 | }; |
| 37 | I2C_CLIENT_INSMOD; |
| 38 | |
| 39 | /* insmod options used at init time => read/only */ |
| 40 | static unsigned int addr = 0; |
| 41 | module_param(addr, int, 0444); |
| 42 | |
| 43 | /* insmod options used at runtime => read/write */ |
| 44 | unsigned int tuner_debug = 0; |
| 45 | module_param(tuner_debug, int, 0644); |
| 46 | |
| 47 | static unsigned int tv_range[2] = { 44, 958 }; |
| 48 | static unsigned int radio_range[2] = { 65, 108 }; |
| 49 | |
| 50 | module_param_array(tv_range, int, NULL, 0644); |
| 51 | module_param_array(radio_range, int, NULL, 0644); |
| 52 | |
| 53 | MODULE_DESCRIPTION("device driver for various TV and TV+FM radio tuners"); |
| 54 | MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer"); |
| 55 | MODULE_LICENSE("GPL"); |
| 56 | |
| 57 | static int this_adap; |
| 58 | |
| 59 | static struct i2c_driver driver; |
| 60 | static struct i2c_client client_template; |
| 61 | |
| 62 | /* ---------------------------------------------------------------------- */ |
| 63 | |
| 64 | // Set tuner frequency, freq in Units of 62.5kHz = 1/16MHz |
| 65 | static void set_tv_freq(struct i2c_client *c, unsigned int freq) |
| 66 | { |
| 67 | struct tuner *t = i2c_get_clientdata(c); |
| 68 | |
| 69 | if (t->type == UNSET) { |
| 70 | tuner_info("tuner type not set\n"); |
| 71 | return; |
| 72 | } |
| 73 | if (NULL == t->tv_freq) { |
| 74 | tuner_info("Huh? tv_set is NULL?\n"); |
| 75 | return; |
| 76 | } |
| 77 | if (freq < tv_range[0]*16 || freq > tv_range[1]*16) { |
| 78 | /* FIXME: better do that chip-specific, but |
| 79 | right now we don't have that in the config |
| 80 | struct and this way is still better than no |
| 81 | check at all */ |
| 82 | tuner_info("TV freq (%d.%02d) out of range (%d-%d)\n", |
| 83 | freq/16,freq%16*100/16,tv_range[0],tv_range[1]); |
| 84 | return; |
| 85 | } |
| 86 | t->tv_freq(c,freq); |
| 87 | } |
| 88 | |
| 89 | static void set_radio_freq(struct i2c_client *c, unsigned int freq) |
| 90 | { |
| 91 | struct tuner *t = i2c_get_clientdata(c); |
| 92 | |
| 93 | if (t->type == UNSET) { |
| 94 | tuner_info("tuner type not set\n"); |
| 95 | return; |
| 96 | } |
| 97 | if (NULL == t->radio_freq) { |
| 98 | tuner_info("no radio tuning for this one, sorry.\n"); |
| 99 | return; |
| 100 | } |
| 101 | if (freq < radio_range[0]*16 || freq > radio_range[1]*16) { |
| 102 | tuner_info("radio freq (%d.%02d) out of range (%d-%d)\n", |
| 103 | freq/16,freq%16*100/16, |
| 104 | radio_range[0],radio_range[1]); |
| 105 | return; |
| 106 | } |
| 107 | t->radio_freq(c,freq); |
| 108 | } |
| 109 | |
| 110 | static void set_freq(struct i2c_client *c, unsigned long freq) |
| 111 | { |
| 112 | struct tuner *t = i2c_get_clientdata(c); |
| 113 | |
| 114 | switch (t->mode) { |
| 115 | case V4L2_TUNER_RADIO: |
| 116 | tuner_dbg("radio freq set to %lu.%02lu\n", |
| 117 | freq/16,freq%16*100/16); |
| 118 | set_radio_freq(c,freq); |
| 119 | break; |
| 120 | case V4L2_TUNER_ANALOG_TV: |
| 121 | case V4L2_TUNER_DIGITAL_TV: |
| 122 | tuner_dbg("tv freq set to %lu.%02lu\n", |
| 123 | freq/16,freq%16*100/16); |
| 124 | set_tv_freq(c, freq); |
| 125 | break; |
| 126 | } |
| 127 | t->freq = freq; |
| 128 | } |
| 129 | |
| 130 | static void set_type(struct i2c_client *c, unsigned int type) |
| 131 | { |
| 132 | struct tuner *t = i2c_get_clientdata(c); |
| 133 | |
| 134 | /* sanity check */ |
| 135 | if (type == UNSET || type == TUNER_ABSENT) |
| 136 | return; |
| 137 | if (type >= tuner_count) |
| 138 | return; |
| 139 | |
| 140 | if (NULL == t->i2c.dev.driver) { |
| 141 | /* not registered yet */ |
| 142 | t->type = type; |
| 143 | return; |
| 144 | } |
| 145 | if (t->initialized) |
| 146 | /* run only once */ |
| 147 | return; |
| 148 | |
| 149 | t->initialized = 1; |
| 150 | t->type = type; |
| 151 | switch (t->type) { |
| 152 | case TUNER_MT2032: |
| 153 | microtune_init(c); |
| 154 | break; |
| 155 | case TUNER_PHILIPS_TDA8290: |
| 156 | tda8290_init(c); |
| 157 | break; |
| 158 | default: |
| 159 | default_tuner_init(c); |
| 160 | break; |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | static char pal[] = "-"; |
| 165 | module_param_string(pal, pal, 0644, sizeof(pal)); |
| 166 | |
| 167 | static int tuner_fixup_std(struct tuner *t) |
| 168 | { |
| 169 | if ((t->std & V4L2_STD_PAL) == V4L2_STD_PAL) { |
| 170 | /* get more precise norm info from insmod option */ |
| 171 | switch (pal[0]) { |
| 172 | case 'b': |
| 173 | case 'B': |
| 174 | case 'g': |
| 175 | case 'G': |
| 176 | tuner_dbg("insmod fixup: PAL => PAL-BG\n"); |
| 177 | t->std = V4L2_STD_PAL_BG; |
| 178 | break; |
| 179 | case 'i': |
| 180 | case 'I': |
| 181 | tuner_dbg("insmod fixup: PAL => PAL-I\n"); |
| 182 | t->std = V4L2_STD_PAL_I; |
| 183 | break; |
| 184 | case 'd': |
| 185 | case 'D': |
| 186 | case 'k': |
| 187 | case 'K': |
| 188 | tuner_dbg("insmod fixup: PAL => PAL-DK\n"); |
| 189 | t->std = V4L2_STD_PAL_DK; |
| 190 | break; |
| 191 | } |
| 192 | } |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | /* ---------------------------------------------------------------------- */ |
| 197 | |
| 198 | static int tuner_attach(struct i2c_adapter *adap, int addr, int kind) |
| 199 | { |
| 200 | struct tuner *t; |
| 201 | |
| 202 | if (this_adap > 0) |
| 203 | return -1; |
| 204 | this_adap++; |
| 205 | |
| 206 | client_template.adapter = adap; |
| 207 | client_template.addr = addr; |
| 208 | |
| 209 | t = kmalloc(sizeof(struct tuner),GFP_KERNEL); |
| 210 | if (NULL == t) |
| 211 | return -ENOMEM; |
| 212 | memset(t,0,sizeof(struct tuner)); |
| 213 | memcpy(&t->i2c,&client_template,sizeof(struct i2c_client)); |
| 214 | i2c_set_clientdata(&t->i2c, t); |
| 215 | t->type = UNSET; |
| 216 | t->radio_if2 = 10700*1000; // 10.7MHz - FM radio |
| 217 | |
| 218 | i2c_attach_client(&t->i2c); |
| 219 | tuner_info("chip found @ 0x%x (%s)\n", |
| 220 | addr << 1, adap->name); |
| 221 | set_type(&t->i2c, t->type); |
| 222 | return 0; |
| 223 | } |
| 224 | |
| 225 | static int tuner_probe(struct i2c_adapter *adap) |
| 226 | { |
| 227 | if (0 != addr) { |
| 228 | normal_i2c[0] = addr; |
| 229 | normal_i2c_range[0] = addr; |
| 230 | normal_i2c_range[1] = addr; |
| 231 | } |
| 232 | this_adap = 0; |
| 233 | |
| 234 | if (adap->class & I2C_CLASS_TV_ANALOG) |
| 235 | return i2c_probe(adap, &addr_data, tuner_attach); |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | static int tuner_detach(struct i2c_client *client) |
| 240 | { |
| 241 | struct tuner *t = i2c_get_clientdata(client); |
| 242 | |
| 243 | i2c_detach_client(&t->i2c); |
| 244 | kfree(t); |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | #define SWITCH_V4L2 if (!t->using_v4l2 && tuner_debug) \ |
| 249 | tuner_info("switching to v4l2\n"); \ |
| 250 | t->using_v4l2 = 1; |
| 251 | #define CHECK_V4L2 if (t->using_v4l2) { if (tuner_debug) \ |
| 252 | tuner_info("ignore v4l1 call\n"); \ |
| 253 | return 0; } |
| 254 | |
| 255 | static int |
| 256 | tuner_command(struct i2c_client *client, unsigned int cmd, void *arg) |
| 257 | { |
| 258 | struct tuner *t = i2c_get_clientdata(client); |
| 259 | unsigned int *iarg = (int*)arg; |
| 260 | |
| 261 | switch (cmd) { |
| 262 | |
| 263 | /* --- configuration --- */ |
| 264 | case TUNER_SET_TYPE: |
| 265 | set_type(client,*iarg); |
| 266 | break; |
| 267 | case AUDC_SET_RADIO: |
| 268 | if (V4L2_TUNER_RADIO != t->mode) { |
| 269 | set_tv_freq(client,400 * 16); |
| 270 | t->mode = V4L2_TUNER_RADIO; |
| 271 | } |
| 272 | break; |
| 273 | case AUDC_CONFIG_PINNACLE: |
| 274 | switch (*iarg) { |
| 275 | case 2: |
| 276 | tuner_dbg("pinnacle pal\n"); |
| 277 | t->radio_if2 = 33300 * 1000; |
| 278 | break; |
| 279 | case 3: |
| 280 | tuner_dbg("pinnacle ntsc\n"); |
| 281 | t->radio_if2 = 41300 * 1000; |
| 282 | break; |
| 283 | } |
| 284 | break; |
| 285 | |
| 286 | /* --- v4l ioctls --- */ |
| 287 | /* take care: bttv does userspace copying, we'll get a |
| 288 | kernel pointer here... */ |
| 289 | case VIDIOCSCHAN: |
| 290 | { |
| 291 | static const v4l2_std_id map[] = { |
| 292 | [ VIDEO_MODE_PAL ] = V4L2_STD_PAL, |
| 293 | [ VIDEO_MODE_NTSC ] = V4L2_STD_NTSC_M, |
| 294 | [ VIDEO_MODE_SECAM ] = V4L2_STD_SECAM, |
| 295 | [ 4 /* bttv */ ] = V4L2_STD_PAL_M, |
| 296 | [ 5 /* bttv */ ] = V4L2_STD_PAL_N, |
| 297 | [ 6 /* bttv */ ] = V4L2_STD_NTSC_M_JP, |
| 298 | }; |
| 299 | struct video_channel *vc = arg; |
| 300 | |
| 301 | CHECK_V4L2; |
| 302 | t->mode = V4L2_TUNER_ANALOG_TV; |
| 303 | if (vc->norm < ARRAY_SIZE(map)) |
| 304 | t->std = map[vc->norm]; |
| 305 | tuner_fixup_std(t); |
| 306 | if (t->freq) |
| 307 | set_tv_freq(client,t->freq); |
| 308 | return 0; |
| 309 | } |
| 310 | case VIDIOCSFREQ: |
| 311 | { |
| 312 | unsigned long *v = arg; |
| 313 | |
| 314 | CHECK_V4L2; |
| 315 | set_freq(client,*v); |
| 316 | return 0; |
| 317 | } |
| 318 | case VIDIOCGTUNER: |
| 319 | { |
| 320 | struct video_tuner *vt = arg; |
| 321 | |
| 322 | CHECK_V4L2; |
| 323 | if (V4L2_TUNER_RADIO == t->mode && t->has_signal) |
| 324 | vt->signal = t->has_signal(client); |
| 325 | return 0; |
| 326 | } |
| 327 | case VIDIOCGAUDIO: |
| 328 | { |
| 329 | struct video_audio *va = arg; |
| 330 | |
| 331 | CHECK_V4L2; |
| 332 | if (V4L2_TUNER_RADIO == t->mode && t->is_stereo) |
| 333 | va->mode = t->is_stereo(client) |
| 334 | ? VIDEO_SOUND_STEREO |
| 335 | : VIDEO_SOUND_MONO; |
| 336 | return 0; |
| 337 | } |
| 338 | |
| 339 | case VIDIOC_S_STD: |
| 340 | { |
| 341 | v4l2_std_id *id = arg; |
| 342 | |
| 343 | SWITCH_V4L2; |
| 344 | t->mode = V4L2_TUNER_ANALOG_TV; |
| 345 | t->std = *id; |
| 346 | tuner_fixup_std(t); |
| 347 | if (t->freq) |
| 348 | set_freq(client,t->freq); |
| 349 | break; |
| 350 | } |
| 351 | case VIDIOC_S_FREQUENCY: |
| 352 | { |
| 353 | struct v4l2_frequency *f = arg; |
| 354 | |
| 355 | SWITCH_V4L2; |
| 356 | if (V4L2_TUNER_RADIO == f->type && |
| 357 | V4L2_TUNER_RADIO != t->mode) |
| 358 | set_tv_freq(client,400*16); |
| 359 | t->mode = f->type; |
| 360 | t->freq = f->frequency; |
| 361 | set_freq(client,t->freq); |
| 362 | break; |
| 363 | } |
| 364 | case VIDIOC_G_TUNER: |
| 365 | { |
| 366 | struct v4l2_tuner *tuner = arg; |
| 367 | |
| 368 | SWITCH_V4L2; |
| 369 | if (V4L2_TUNER_RADIO == t->mode && t->has_signal) |
| 370 | tuner->signal = t->has_signal(client); |
| 371 | break; |
| 372 | } |
| 373 | default: |
| 374 | /* nothing */ |
| 375 | break; |
| 376 | } |
| 377 | |
| 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | static int tuner_suspend(struct device * dev, u32 state, u32 level) |
| 382 | { |
| 383 | struct i2c_client *c = container_of(dev, struct i2c_client, dev); |
| 384 | struct tuner *t = i2c_get_clientdata(c); |
| 385 | |
| 386 | tuner_dbg("suspend\n"); |
| 387 | /* FIXME: power down ??? */ |
| 388 | return 0; |
| 389 | } |
| 390 | |
| 391 | static int tuner_resume(struct device * dev, u32 level) |
| 392 | { |
| 393 | struct i2c_client *c = container_of(dev, struct i2c_client, dev); |
| 394 | struct tuner *t = i2c_get_clientdata(c); |
| 395 | |
| 396 | tuner_dbg("resume\n"); |
| 397 | if (t->freq) |
| 398 | set_freq(c,t->freq); |
| 399 | return 0; |
| 400 | } |
| 401 | |
| 402 | /* ----------------------------------------------------------------------- */ |
| 403 | |
| 404 | static struct i2c_driver driver = { |
| 405 | .owner = THIS_MODULE, |
| 406 | .name = "tuner", |
| 407 | .id = I2C_DRIVERID_TUNER, |
| 408 | .flags = I2C_DF_NOTIFY, |
| 409 | .attach_adapter = tuner_probe, |
| 410 | .detach_client = tuner_detach, |
| 411 | .command = tuner_command, |
| 412 | .driver = { |
| 413 | .suspend = tuner_suspend, |
| 414 | .resume = tuner_resume, |
| 415 | }, |
| 416 | }; |
| 417 | static struct i2c_client client_template = |
| 418 | { |
| 419 | I2C_DEVNAME("(tuner unset)"), |
| 420 | .flags = I2C_CLIENT_ALLOW_USE, |
| 421 | .driver = &driver, |
| 422 | }; |
| 423 | |
| 424 | static int __init tuner_init_module(void) |
| 425 | { |
| 426 | return i2c_add_driver(&driver); |
| 427 | } |
| 428 | |
| 429 | static void __exit tuner_cleanup_module(void) |
| 430 | { |
| 431 | i2c_del_driver(&driver); |
| 432 | } |
| 433 | |
| 434 | module_init(tuner_init_module); |
| 435 | module_exit(tuner_cleanup_module); |
| 436 | |
| 437 | /* |
| 438 | * Overrides for Emacs so that we follow Linus's tabbing style. |
| 439 | * --------------------------------------------------------------------------- |
| 440 | * Local variables: |
| 441 | * c-basic-offset: 8 |
| 442 | * End: |
| 443 | */ |