Fabio Belavenuto | 46a60cf | 2008-12-30 19:27:09 -0300 | [diff] [blame] | 1 | /* |
| 2 | * driver/media/radio/radio-tea5764.c |
| 3 | * |
| 4 | * Driver for TEA5764 radio chip for linux 2.6. |
| 5 | * This driver is for TEA5764 chip from NXP, used in EZX phones from Motorola. |
| 6 | * The I2C protocol is used for communicate with chip. |
| 7 | * |
| 8 | * Based in radio-tea5761.c Copyright (C) 2005 Nokia Corporation |
| 9 | * |
| 10 | * Copyright (c) 2008 Fabio Belavenuto <belavenuto@gmail.com> |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 25 | * |
| 26 | * History: |
| 27 | * 2008-12-06 Fabio Belavenuto <belavenuto@gmail.com> |
| 28 | * initial code |
| 29 | * |
| 30 | * TODO: |
| 31 | * add platform_data support for IRQs platform dependencies |
| 32 | * add RDS support |
| 33 | */ |
| 34 | #include <linux/kernel.h> |
| 35 | #include <linux/module.h> |
| 36 | #include <linux/init.h> /* Initdata */ |
| 37 | #include <linux/videodev2.h> /* kernel radio structs */ |
| 38 | #include <linux/i2c.h> /* I2C */ |
| 39 | #include <media/v4l2-common.h> |
| 40 | #include <media/v4l2-ioctl.h> |
| 41 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ |
| 42 | |
| 43 | #define DRIVER_VERSION "v0.01" |
| 44 | #define RADIO_VERSION KERNEL_VERSION(0, 0, 1) |
| 45 | |
| 46 | #define DRIVER_AUTHOR "Fabio Belavenuto <belavenuto@gmail.com>" |
| 47 | #define DRIVER_DESC "A driver for the TEA5764 radio chip for EZX Phones." |
| 48 | |
| 49 | #define PINFO(format, ...)\ |
| 50 | printk(KERN_INFO KBUILD_MODNAME ": "\ |
| 51 | DRIVER_VERSION ": " format "\n", ## __VA_ARGS__) |
| 52 | #define PWARN(format, ...)\ |
| 53 | printk(KERN_WARNING KBUILD_MODNAME ": "\ |
| 54 | DRIVER_VERSION ": " format "\n", ## __VA_ARGS__) |
| 55 | # define PDEBUG(format, ...)\ |
| 56 | printk(KERN_DEBUG KBUILD_MODNAME ": "\ |
| 57 | DRIVER_VERSION ": " format "\n", ## __VA_ARGS__) |
| 58 | |
| 59 | /* Frequency limits in MHz -- these are European values. For Japanese |
| 60 | devices, that would be 76000 and 91000. */ |
| 61 | #define FREQ_MIN 87500 |
| 62 | #define FREQ_MAX 108000 |
| 63 | #define FREQ_MUL 16 |
| 64 | |
| 65 | /* TEA5764 registers */ |
| 66 | #define TEA5764_MANID 0x002b |
| 67 | #define TEA5764_CHIPID 0x5764 |
| 68 | |
| 69 | #define TEA5764_INTREG_BLMSK 0x0001 |
| 70 | #define TEA5764_INTREG_FRRMSK 0x0002 |
| 71 | #define TEA5764_INTREG_LEVMSK 0x0008 |
| 72 | #define TEA5764_INTREG_IFMSK 0x0010 |
| 73 | #define TEA5764_INTREG_BLMFLAG 0x0100 |
| 74 | #define TEA5764_INTREG_FRRFLAG 0x0200 |
| 75 | #define TEA5764_INTREG_LEVFLAG 0x0800 |
| 76 | #define TEA5764_INTREG_IFFLAG 0x1000 |
| 77 | |
| 78 | #define TEA5764_FRQSET_SUD 0x8000 |
| 79 | #define TEA5764_FRQSET_SM 0x4000 |
| 80 | |
| 81 | #define TEA5764_TNCTRL_PUPD1 0x8000 |
| 82 | #define TEA5764_TNCTRL_PUPD0 0x4000 |
| 83 | #define TEA5764_TNCTRL_BLIM 0x2000 |
| 84 | #define TEA5764_TNCTRL_SWPM 0x1000 |
| 85 | #define TEA5764_TNCTRL_IFCTC 0x0800 |
| 86 | #define TEA5764_TNCTRL_AFM 0x0400 |
| 87 | #define TEA5764_TNCTRL_SMUTE 0x0200 |
| 88 | #define TEA5764_TNCTRL_SNC 0x0100 |
| 89 | #define TEA5764_TNCTRL_MU 0x0080 |
| 90 | #define TEA5764_TNCTRL_SSL1 0x0040 |
| 91 | #define TEA5764_TNCTRL_SSL0 0x0020 |
| 92 | #define TEA5764_TNCTRL_HLSI 0x0010 |
| 93 | #define TEA5764_TNCTRL_MST 0x0008 |
| 94 | #define TEA5764_TNCTRL_SWP 0x0004 |
| 95 | #define TEA5764_TNCTRL_DTC 0x0002 |
| 96 | #define TEA5764_TNCTRL_AHLSI 0x0001 |
| 97 | |
| 98 | #define TEA5764_TUNCHK_LEVEL(x) (((x) & 0x00F0) >> 4) |
| 99 | #define TEA5764_TUNCHK_IFCNT(x) (((x) & 0xFE00) >> 9) |
| 100 | #define TEA5764_TUNCHK_TUNTO 0x0100 |
| 101 | #define TEA5764_TUNCHK_LD 0x0008 |
| 102 | #define TEA5764_TUNCHK_STEREO 0x0004 |
| 103 | |
| 104 | #define TEA5764_TESTREG_TRIGFR 0x0800 |
| 105 | |
| 106 | struct tea5764_regs { |
| 107 | u16 intreg; /* INTFLAG & INTMSK */ |
| 108 | u16 frqset; /* FRQSETMSB & FRQSETLSB */ |
| 109 | u16 tnctrl; /* TNCTRL1 & TNCTRL2 */ |
| 110 | u16 frqchk; /* FRQCHKMSB & FRQCHKLSB */ |
| 111 | u16 tunchk; /* IFCHK & LEVCHK */ |
| 112 | u16 testreg; /* TESTBITS & TESTMODE */ |
| 113 | u16 rdsstat; /* RDSSTAT1 & RDSSTAT2 */ |
| 114 | u16 rdslb; /* RDSLBMSB & RDSLBLSB */ |
| 115 | u16 rdspb; /* RDSPBMSB & RDSPBLSB */ |
| 116 | u16 rdsbc; /* RDSBBC & RDSGBC */ |
| 117 | u16 rdsctrl; /* RDSCTRL1 & RDSCTRL2 */ |
| 118 | u16 rdsbbl; /* PAUSEDET & RDSBBL */ |
| 119 | u16 manid; /* MANID1 & MANID2 */ |
| 120 | u16 chipid; /* CHIPID1 & CHIPID2 */ |
| 121 | } __attribute__ ((packed)); |
| 122 | |
| 123 | struct tea5764_write_regs { |
| 124 | u8 intreg; /* INTMSK */ |
| 125 | u16 frqset; /* FRQSETMSB & FRQSETLSB */ |
| 126 | u16 tnctrl; /* TNCTRL1 & TNCTRL2 */ |
| 127 | u16 testreg; /* TESTBITS & TESTMODE */ |
| 128 | u16 rdsctrl; /* RDSCTRL1 & RDSCTRL2 */ |
| 129 | u16 rdsbbl; /* PAUSEDET & RDSBBL */ |
| 130 | } __attribute__ ((packed)); |
| 131 | |
| 132 | #ifndef RADIO_TEA5764_XTAL |
| 133 | #define RADIO_TEA5764_XTAL 1 |
| 134 | #endif |
| 135 | |
| 136 | static int radio_nr = -1; |
| 137 | static int use_xtal = RADIO_TEA5764_XTAL; |
| 138 | |
| 139 | struct tea5764_device { |
| 140 | struct i2c_client *i2c_client; |
| 141 | struct video_device *videodev; |
| 142 | struct tea5764_regs regs; |
| 143 | struct mutex mutex; |
| 144 | int users; |
| 145 | }; |
| 146 | |
| 147 | /* I2C code related */ |
| 148 | int tea5764_i2c_read(struct tea5764_device *radio) |
| 149 | { |
| 150 | int i; |
| 151 | u16 *p = (u16 *) &radio->regs; |
| 152 | |
| 153 | struct i2c_msg msgs[1] = { |
| 154 | { radio->i2c_client->addr, I2C_M_RD, sizeof(radio->regs), |
| 155 | (void *)&radio->regs }, |
| 156 | }; |
| 157 | if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1) |
| 158 | return -EIO; |
| 159 | for (i = 0; i < sizeof(struct tea5764_regs) / sizeof(u16); i++) |
| 160 | p[i] = __be16_to_cpu(p[i]); |
| 161 | |
| 162 | return 0; |
| 163 | } |
| 164 | |
| 165 | int tea5764_i2c_write(struct tea5764_device *radio) |
| 166 | { |
| 167 | struct tea5764_write_regs wr; |
| 168 | struct tea5764_regs *r = &radio->regs; |
| 169 | struct i2c_msg msgs[1] = { |
| 170 | { radio->i2c_client->addr, 0, sizeof(wr), (void *) &wr }, |
| 171 | }; |
| 172 | wr.intreg = r->intreg & 0xff; |
| 173 | wr.frqset = __cpu_to_be16(r->frqset); |
| 174 | wr.tnctrl = __cpu_to_be16(r->tnctrl); |
| 175 | wr.testreg = __cpu_to_be16(r->testreg); |
| 176 | wr.rdsctrl = __cpu_to_be16(r->rdsctrl); |
| 177 | wr.rdsbbl = __cpu_to_be16(r->rdsbbl); |
| 178 | if (i2c_transfer(radio->i2c_client->adapter, msgs, 1) != 1) |
| 179 | return -EIO; |
| 180 | return 0; |
| 181 | } |
| 182 | |
| 183 | /* V4L2 code related */ |
| 184 | static struct v4l2_queryctrl radio_qctrl[] = { |
| 185 | { |
| 186 | .id = V4L2_CID_AUDIO_MUTE, |
| 187 | .name = "Mute", |
| 188 | .minimum = 0, |
| 189 | .maximum = 1, |
| 190 | .default_value = 1, |
| 191 | .type = V4L2_CTRL_TYPE_BOOLEAN, |
| 192 | } |
| 193 | }; |
| 194 | |
| 195 | static void tea5764_power_up(struct tea5764_device *radio) |
| 196 | { |
| 197 | struct tea5764_regs *r = &radio->regs; |
| 198 | |
| 199 | if (!(r->tnctrl & TEA5764_TNCTRL_PUPD0)) { |
| 200 | r->tnctrl &= ~(TEA5764_TNCTRL_AFM | TEA5764_TNCTRL_MU | |
| 201 | TEA5764_TNCTRL_HLSI); |
| 202 | if (!use_xtal) |
| 203 | r->testreg |= TEA5764_TESTREG_TRIGFR; |
| 204 | else |
| 205 | r->testreg &= ~TEA5764_TESTREG_TRIGFR; |
| 206 | |
| 207 | r->tnctrl |= TEA5764_TNCTRL_PUPD0; |
| 208 | tea5764_i2c_write(radio); |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | static void tea5764_power_down(struct tea5764_device *radio) |
| 213 | { |
| 214 | struct tea5764_regs *r = &radio->regs; |
| 215 | |
| 216 | if (r->tnctrl & TEA5764_TNCTRL_PUPD0) { |
| 217 | r->tnctrl &= ~TEA5764_TNCTRL_PUPD0; |
| 218 | tea5764_i2c_write(radio); |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | static void tea5764_set_freq(struct tea5764_device *radio, int freq) |
| 223 | { |
| 224 | struct tea5764_regs *r = &radio->regs; |
| 225 | |
| 226 | /* formula: (freq [+ or -] 225000) / 8192 */ |
| 227 | if (r->tnctrl & TEA5764_TNCTRL_HLSI) |
| 228 | r->frqset = (freq + 225000) / 8192; |
| 229 | else |
| 230 | r->frqset = (freq - 225000) / 8192; |
| 231 | } |
| 232 | |
| 233 | static int tea5764_get_freq(struct tea5764_device *radio) |
| 234 | { |
| 235 | struct tea5764_regs *r = &radio->regs; |
| 236 | |
| 237 | if (r->tnctrl & TEA5764_TNCTRL_HLSI) |
| 238 | return (r->frqchk * 8192) - 225000; |
| 239 | else |
| 240 | return (r->frqchk * 8192) + 225000; |
| 241 | } |
| 242 | |
| 243 | /* tune an frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */ |
| 244 | static void tea5764_tune(struct tea5764_device *radio, int freq) |
| 245 | { |
| 246 | tea5764_set_freq(radio, freq); |
| 247 | if (tea5764_i2c_write(radio)) |
| 248 | PWARN("Could not set frequency!"); |
| 249 | } |
| 250 | |
| 251 | static void tea5764_set_audout_mode(struct tea5764_device *radio, int audmode) |
| 252 | { |
| 253 | struct tea5764_regs *r = &radio->regs; |
| 254 | int tnctrl = r->tnctrl; |
| 255 | |
| 256 | if (audmode == V4L2_TUNER_MODE_MONO) |
| 257 | r->tnctrl |= TEA5764_TNCTRL_MST; |
| 258 | else |
| 259 | r->tnctrl &= ~TEA5764_TNCTRL_MST; |
| 260 | if (tnctrl != r->tnctrl) |
| 261 | tea5764_i2c_write(radio); |
| 262 | } |
| 263 | |
| 264 | static int tea5764_get_audout_mode(struct tea5764_device *radio) |
| 265 | { |
| 266 | struct tea5764_regs *r = &radio->regs; |
| 267 | |
| 268 | if (r->tnctrl & TEA5764_TNCTRL_MST) |
| 269 | return V4L2_TUNER_MODE_MONO; |
| 270 | else |
| 271 | return V4L2_TUNER_MODE_STEREO; |
| 272 | } |
| 273 | |
| 274 | static void tea5764_mute(struct tea5764_device *radio, int on) |
| 275 | { |
| 276 | struct tea5764_regs *r = &radio->regs; |
| 277 | int tnctrl = r->tnctrl; |
| 278 | |
| 279 | if (on) |
| 280 | r->tnctrl |= TEA5764_TNCTRL_MU; |
| 281 | else |
| 282 | r->tnctrl &= ~TEA5764_TNCTRL_MU; |
| 283 | if (tnctrl != r->tnctrl) |
| 284 | tea5764_i2c_write(radio); |
| 285 | } |
| 286 | |
| 287 | static int tea5764_is_muted(struct tea5764_device *radio) |
| 288 | { |
| 289 | return radio->regs.tnctrl & TEA5764_TNCTRL_MU; |
| 290 | } |
| 291 | |
| 292 | /* V4L2 vidioc */ |
| 293 | static int vidioc_querycap(struct file *file, void *priv, |
| 294 | struct v4l2_capability *v) |
| 295 | { |
| 296 | struct tea5764_device *radio = video_drvdata(file); |
| 297 | struct video_device *dev = radio->videodev; |
| 298 | |
| 299 | strlcpy(v->driver, dev->dev.driver->name, sizeof(v->driver)); |
| 300 | strlcpy(v->card, dev->name, sizeof(v->card)); |
| 301 | snprintf(v->bus_info, sizeof(v->bus_info), "I2C:%s", dev->dev.bus_id); |
| 302 | v->version = RADIO_VERSION; |
| 303 | v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; |
| 304 | return 0; |
| 305 | } |
| 306 | |
| 307 | static int vidioc_g_tuner(struct file *file, void *priv, |
| 308 | struct v4l2_tuner *v) |
| 309 | { |
| 310 | struct tea5764_device *radio = video_drvdata(file); |
| 311 | struct tea5764_regs *r = &radio->regs; |
| 312 | |
| 313 | if (v->index > 0) |
| 314 | return -EINVAL; |
| 315 | |
| 316 | memset(v, 0, sizeof(v)); |
| 317 | strcpy(v->name, "FM"); |
| 318 | v->type = V4L2_TUNER_RADIO; |
| 319 | tea5764_i2c_read(radio); |
| 320 | v->rangelow = FREQ_MIN * FREQ_MUL; |
| 321 | v->rangehigh = FREQ_MAX * FREQ_MUL; |
| 322 | v->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO; |
| 323 | if (r->tunchk & TEA5764_TUNCHK_STEREO) |
| 324 | v->rxsubchans = V4L2_TUNER_SUB_STEREO; |
| 325 | v->audmode = tea5764_get_audout_mode(radio); |
| 326 | v->signal = TEA5764_TUNCHK_LEVEL(r->tunchk) * 0xffff / 0xf; |
| 327 | v->afc = TEA5764_TUNCHK_IFCNT(r->tunchk); |
| 328 | |
| 329 | return 0; |
| 330 | } |
| 331 | |
| 332 | static int vidioc_s_tuner(struct file *file, void *priv, |
| 333 | struct v4l2_tuner *v) |
| 334 | { |
| 335 | struct tea5764_device *radio = video_drvdata(file); |
| 336 | |
| 337 | if (v->index > 0) |
| 338 | return -EINVAL; |
| 339 | |
| 340 | tea5764_set_audout_mode(radio, v->audmode); |
| 341 | return 0; |
| 342 | } |
| 343 | |
| 344 | static int vidioc_s_frequency(struct file *file, void *priv, |
| 345 | struct v4l2_frequency *f) |
| 346 | { |
| 347 | struct tea5764_device *radio = video_drvdata(file); |
| 348 | |
| 349 | if (f->tuner != 0) |
| 350 | return -EINVAL; |
| 351 | if (f->frequency == 0) { |
| 352 | /* We special case this as a power down control. */ |
| 353 | tea5764_power_down(radio); |
| 354 | } |
| 355 | if (f->frequency < (FREQ_MIN * FREQ_MUL)) |
| 356 | return -EINVAL; |
| 357 | if (f->frequency > (FREQ_MAX * FREQ_MUL)) |
| 358 | return -EINVAL; |
| 359 | tea5764_power_up(radio); |
| 360 | tea5764_tune(radio, (f->frequency * 125) / 2); |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | static int vidioc_g_frequency(struct file *file, void *priv, |
| 365 | struct v4l2_frequency *f) |
| 366 | { |
| 367 | struct tea5764_device *radio = video_drvdata(file); |
| 368 | struct tea5764_regs *r = &radio->regs; |
| 369 | |
| 370 | tea5764_i2c_read(radio); |
| 371 | memset(f, 0, sizeof(f)); |
| 372 | f->type = V4L2_TUNER_RADIO; |
| 373 | if (r->tnctrl & TEA5764_TNCTRL_PUPD0) |
| 374 | f->frequency = (tea5764_get_freq(radio) * 2) / 125; |
| 375 | else |
| 376 | f->frequency = 0; |
| 377 | |
| 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | static int vidioc_queryctrl(struct file *file, void *priv, |
| 382 | struct v4l2_queryctrl *qc) |
| 383 | { |
| 384 | int i; |
| 385 | |
| 386 | for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { |
| 387 | if (qc->id && qc->id == radio_qctrl[i].id) { |
| 388 | memcpy(qc, &(radio_qctrl[i]), sizeof(*qc)); |
| 389 | return 0; |
| 390 | } |
| 391 | } |
| 392 | return -EINVAL; |
| 393 | } |
| 394 | |
| 395 | static int vidioc_g_ctrl(struct file *file, void *priv, |
| 396 | struct v4l2_control *ctrl) |
| 397 | { |
| 398 | struct tea5764_device *radio = video_drvdata(file); |
| 399 | |
| 400 | switch (ctrl->id) { |
| 401 | case V4L2_CID_AUDIO_MUTE: |
| 402 | tea5764_i2c_read(radio); |
| 403 | ctrl->value = tea5764_is_muted(radio) ? 1 : 0; |
| 404 | return 0; |
| 405 | } |
| 406 | return -EINVAL; |
| 407 | } |
| 408 | |
| 409 | static int vidioc_s_ctrl(struct file *file, void *priv, |
| 410 | struct v4l2_control *ctrl) |
| 411 | { |
| 412 | struct tea5764_device *radio = video_drvdata(file); |
| 413 | |
| 414 | switch (ctrl->id) { |
| 415 | case V4L2_CID_AUDIO_MUTE: |
| 416 | tea5764_mute(radio, ctrl->value); |
| 417 | return 0; |
| 418 | } |
| 419 | return -EINVAL; |
| 420 | } |
| 421 | |
| 422 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) |
| 423 | { |
| 424 | *i = 0; |
| 425 | return 0; |
| 426 | } |
| 427 | |
| 428 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) |
| 429 | { |
| 430 | if (i != 0) |
| 431 | return -EINVAL; |
| 432 | return 0; |
| 433 | } |
| 434 | |
| 435 | static int vidioc_g_audio(struct file *file, void *priv, |
| 436 | struct v4l2_audio *a) |
| 437 | { |
| 438 | if (a->index > 1) |
| 439 | return -EINVAL; |
| 440 | |
| 441 | strcpy(a->name, "Radio"); |
| 442 | a->capability = V4L2_AUDCAP_STEREO; |
| 443 | return 0; |
| 444 | } |
| 445 | |
| 446 | static int vidioc_s_audio(struct file *file, void *priv, |
| 447 | struct v4l2_audio *a) |
| 448 | { |
| 449 | if (a->index != 0) |
| 450 | return -EINVAL; |
| 451 | |
| 452 | return 0; |
| 453 | } |
| 454 | |
| 455 | static int tea5764_open(struct file *file) |
| 456 | { |
| 457 | /* Currently we support only one device */ |
| 458 | int minor = video_devdata(file)->minor; |
| 459 | struct tea5764_device *radio = video_drvdata(file); |
| 460 | |
| 461 | if (radio->videodev->minor != minor) |
| 462 | return -ENODEV; |
| 463 | |
| 464 | mutex_lock(&radio->mutex); |
| 465 | /* Only exclusive access */ |
| 466 | if (radio->users) { |
| 467 | mutex_unlock(&radio->mutex); |
| 468 | return -EBUSY; |
| 469 | } |
| 470 | radio->users++; |
| 471 | mutex_unlock(&radio->mutex); |
| 472 | file->private_data = radio; |
| 473 | return 0; |
| 474 | } |
| 475 | |
| 476 | static int tea5764_close(struct file *file) |
| 477 | { |
| 478 | struct tea5764_device *radio = video_drvdata(file); |
| 479 | |
| 480 | if (!radio) |
| 481 | return -ENODEV; |
| 482 | mutex_lock(&radio->mutex); |
| 483 | radio->users--; |
| 484 | mutex_unlock(&radio->mutex); |
| 485 | return 0; |
| 486 | } |
| 487 | |
| 488 | /* File system interface */ |
| 489 | static const struct v4l2_file_operations tea5764_fops = { |
| 490 | .owner = THIS_MODULE, |
| 491 | .open = tea5764_open, |
| 492 | .release = tea5764_close, |
| 493 | .ioctl = video_ioctl2, |
| 494 | }; |
| 495 | |
| 496 | static const struct v4l2_ioctl_ops tea5764_ioctl_ops = { |
| 497 | .vidioc_querycap = vidioc_querycap, |
| 498 | .vidioc_g_tuner = vidioc_g_tuner, |
| 499 | .vidioc_s_tuner = vidioc_s_tuner, |
| 500 | .vidioc_g_audio = vidioc_g_audio, |
| 501 | .vidioc_s_audio = vidioc_s_audio, |
| 502 | .vidioc_g_input = vidioc_g_input, |
| 503 | .vidioc_s_input = vidioc_s_input, |
| 504 | .vidioc_g_frequency = vidioc_g_frequency, |
| 505 | .vidioc_s_frequency = vidioc_s_frequency, |
| 506 | .vidioc_queryctrl = vidioc_queryctrl, |
| 507 | .vidioc_g_ctrl = vidioc_g_ctrl, |
| 508 | .vidioc_s_ctrl = vidioc_s_ctrl, |
| 509 | }; |
| 510 | |
| 511 | /* V4L2 interface */ |
| 512 | static struct video_device tea5764_radio_template = { |
| 513 | .name = "TEA5764 FM-Radio", |
| 514 | .fops = &tea5764_fops, |
| 515 | .ioctl_ops = &tea5764_ioctl_ops, |
| 516 | .release = video_device_release, |
| 517 | }; |
| 518 | |
| 519 | /* I2C probe: check if the device exists and register with v4l if it is */ |
| 520 | static int __devinit tea5764_i2c_probe(struct i2c_client *client, |
| 521 | const struct i2c_device_id *id) |
| 522 | { |
| 523 | struct tea5764_device *radio; |
| 524 | struct tea5764_regs *r; |
| 525 | int ret; |
| 526 | |
| 527 | PDEBUG("probe"); |
| 528 | radio = kmalloc(sizeof(struct tea5764_device), GFP_KERNEL); |
| 529 | if (!radio) |
| 530 | return -ENOMEM; |
| 531 | |
| 532 | mutex_init(&radio->mutex); |
| 533 | radio->i2c_client = client; |
| 534 | ret = tea5764_i2c_read(radio); |
| 535 | if (ret) |
| 536 | goto errfr; |
| 537 | r = &radio->regs; |
| 538 | PDEBUG("chipid = %04X, manid = %04X", r->chipid, r->manid); |
| 539 | if (r->chipid != TEA5764_CHIPID || |
| 540 | (r->manid & 0x0fff) != TEA5764_MANID) { |
| 541 | PWARN("This chip is not a TEA5764!"); |
| 542 | ret = -EINVAL; |
| 543 | goto errfr; |
| 544 | } |
| 545 | |
| 546 | radio->videodev = video_device_alloc(); |
| 547 | if (!(radio->videodev)) { |
| 548 | ret = -ENOMEM; |
| 549 | goto errfr; |
| 550 | } |
| 551 | memcpy(radio->videodev, &tea5764_radio_template, |
| 552 | sizeof(tea5764_radio_template)); |
| 553 | |
| 554 | i2c_set_clientdata(client, radio); |
| 555 | video_set_drvdata(radio->videodev, radio); |
| 556 | |
| 557 | ret = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr); |
| 558 | if (ret < 0) { |
| 559 | PWARN("Could not register video device!"); |
| 560 | goto errrel; |
| 561 | } |
| 562 | |
| 563 | /* initialize and power off the chip */ |
| 564 | tea5764_i2c_read(radio); |
| 565 | tea5764_set_audout_mode(radio, V4L2_TUNER_MODE_STEREO); |
| 566 | tea5764_mute(radio, 1); |
| 567 | tea5764_power_down(radio); |
| 568 | |
| 569 | PINFO("registered."); |
| 570 | return 0; |
| 571 | errrel: |
| 572 | video_device_release(radio->videodev); |
| 573 | errfr: |
| 574 | kfree(radio); |
| 575 | return ret; |
| 576 | } |
| 577 | |
| 578 | static int __devexit tea5764_i2c_remove(struct i2c_client *client) |
| 579 | { |
| 580 | struct tea5764_device *radio = i2c_get_clientdata(client); |
| 581 | |
| 582 | PDEBUG("remove"); |
| 583 | if (radio) { |
| 584 | tea5764_power_down(radio); |
| 585 | video_unregister_device(radio->videodev); |
| 586 | kfree(radio); |
| 587 | } |
| 588 | return 0; |
| 589 | } |
| 590 | |
| 591 | /* I2C subsystem interface */ |
| 592 | static const struct i2c_device_id tea5764_id[] = { |
| 593 | { "radio-tea5764", 0 }, |
| 594 | { } /* Terminating entry */ |
| 595 | }; |
| 596 | MODULE_DEVICE_TABLE(i2c, tea5764_id); |
| 597 | |
| 598 | static struct i2c_driver tea5764_i2c_driver = { |
| 599 | .driver = { |
| 600 | .name = "radio-tea5764", |
| 601 | .owner = THIS_MODULE, |
| 602 | }, |
| 603 | .probe = tea5764_i2c_probe, |
| 604 | .remove = __devexit_p(tea5764_i2c_remove), |
| 605 | .id_table = tea5764_id, |
| 606 | }; |
| 607 | |
| 608 | /* init the driver */ |
| 609 | static int __init tea5764_init(void) |
| 610 | { |
| 611 | int ret = i2c_add_driver(&tea5764_i2c_driver); |
| 612 | |
| 613 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ": " |
| 614 | DRIVER_DESC "\n"); |
| 615 | return ret; |
| 616 | } |
| 617 | |
| 618 | /* cleanup the driver */ |
| 619 | static void __exit tea5764_exit(void) |
| 620 | { |
| 621 | i2c_del_driver(&tea5764_i2c_driver); |
| 622 | } |
| 623 | |
| 624 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 625 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 626 | MODULE_LICENSE("GPL"); |
| 627 | |
| 628 | module_param(use_xtal, int, 1); |
| 629 | MODULE_PARM_DESC(use_xtal, "Chip have a xtal connected in board"); |
| 630 | module_param(radio_nr, int, 0); |
| 631 | MODULE_PARM_DESC(radio_nr, "video4linux device number to use"); |
| 632 | |
| 633 | module_init(tea5764_init); |
| 634 | module_exit(tea5764_exit); |