1/* 2 *************************************************************************** 3 * 4 * radio-gemtek-pci.c - Gemtek PCI Radio driver 5 * (C) 2001 Vladimir Shebordaev <vshebordaev@mail.ru> 6 * 7 *************************************************************************** 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License as 11 * published by the Free Software Foundation; either version 2 of 12 * the License, or (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public 20 * License along with this program; if not, write to the Free 21 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, 22 * USA. 23 * 24 *************************************************************************** 25 * 26 * Gemtek Corp still silently refuses to release any specifications 27 * of their multimedia devices, so the protocol still has to be 28 * reverse engineered. 29 * 30 * The v4l code was inspired by Jonas Munsin's Gemtek serial line 31 * radio device driver. 32 * 33 * Please, let me know if this piece of code was useful :) 34 * 35 * TODO: multiple device support and portability were not tested 36 * 37 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org> 38 * 39 *************************************************************************** 40 */ 41 42#include <linux/types.h> 43#include <linux/list.h> 44#include <linux/module.h> 45#include <linux/init.h> 46#include <linux/pci.h> 47#include <linux/videodev2.h> 48#include <linux/errno.h> 49#include <linux/version.h> /* for KERNEL_VERSION MACRO */ 50#include <linux/io.h> 51#include <linux/slab.h> 52#include <media/v4l2-device.h> 53#include <media/v4l2-ioctl.h> 54 55MODULE_AUTHOR("Vladimir Shebordaev <vshebordaev@mail.ru>"); 56MODULE_DESCRIPTION("The video4linux driver for the Gemtek PCI Radio Card"); 57MODULE_LICENSE("GPL"); 58 59static int nr_radio = -1; 60static int mx = 1; 61 62module_param(mx, bool, 0); 63MODULE_PARM_DESC(mx, "single digit: 1 - turn off the turner upon module exit (default), 0 - do not"); 64module_param(nr_radio, int, 0); 65MODULE_PARM_DESC(nr_radio, "video4linux device number to use"); 66 67#define RADIO_VERSION KERNEL_VERSION(0, 0, 2) 68 69#ifndef PCI_VENDOR_ID_GEMTEK 70#define PCI_VENDOR_ID_GEMTEK 0x5046 71#endif 72 73#ifndef PCI_DEVICE_ID_GEMTEK_PR103 74#define PCI_DEVICE_ID_GEMTEK_PR103 0x1001 75#endif 76 77#ifndef GEMTEK_PCI_RANGE_LOW 78#define GEMTEK_PCI_RANGE_LOW (87*16000) 79#endif 80 81#ifndef GEMTEK_PCI_RANGE_HIGH 82#define GEMTEK_PCI_RANGE_HIGH (108*16000) 83#endif 84 85struct gemtek_pci { 86 struct v4l2_device v4l2_dev; 87 struct video_device vdev; 88 struct mutex lock; 89 struct pci_dev *pdev; 90 91 u32 iobase; 92 u32 length; 93 94 u32 current_frequency; 95 u8 mute; 96}; 97 98static inline struct gemtek_pci *to_gemtek_pci(struct v4l2_device *v4l2_dev) 99{ 100 return container_of(v4l2_dev, struct gemtek_pci, v4l2_dev); 101} 102 103static inline u8 gemtek_pci_out(u16 value, u32 port) 104{ 105 outw(value, port); 106 107 return (u8)value; 108} 109 110#define _b0(v) (*((u8 *)&v)) 111 112static void __gemtek_pci_cmd(u16 value, u32 port, u8 *last_byte, int keep) 113{ 114 u8 byte = *last_byte; 115 116 if (!value) { 117 if (!keep) 118 value = (u16)port; 119 byte &= 0xfd; 120 } else 121 byte |= 2; 122 123 _b0(value) = byte; 124 outw(value, port); 125 byte |= 1; 126 _b0(value) = byte; 127 outw(value, port); 128 byte &= 0xfe; 129 _b0(value) = byte; 130 outw(value, port); 131 132 *last_byte = byte; 133} 134 135static inline void gemtek_pci_nil(u32 port, u8 *last_byte) 136{ 137 __gemtek_pci_cmd(0x00, port, last_byte, false); 138} 139 140static inline void gemtek_pci_cmd(u16 cmd, u32 port, u8 *last_byte) 141{ 142 __gemtek_pci_cmd(cmd, port, last_byte, true); 143} 144 145static void gemtek_pci_setfrequency(struct gemtek_pci *card, unsigned long frequency) 146{ 147 int i; 148 u32 value = frequency / 200 + 856; 149 u16 mask = 0x8000; 150 u8 last_byte; 151 u32 port = card->iobase; 152 153 mutex_lock(&card->lock); 154 card->current_frequency = frequency; 155 last_byte = gemtek_pci_out(0x06, port); 156 157 i = 0; 158 do { 159 gemtek_pci_nil(port, &last_byte); 160 i++; 161 } while (i < 9); 162 163 i = 0; 164 do { 165 gemtek_pci_cmd(value & mask, port, &last_byte); 166 mask >>= 1; 167 i++; 168 } while (i < 16); 169 170 outw(0x10, port); 171 mutex_unlock(&card->lock); 172} 173 174 175static void gemtek_pci_mute(struct gemtek_pci *card) 176{ 177 mutex_lock(&card->lock); 178 outb(0x1f, card->iobase); 179 card->mute = true; 180 mutex_unlock(&card->lock); 181} 182 183static void gemtek_pci_unmute(struct gemtek_pci *card) 184{ 185 if (card->mute) { 186 gemtek_pci_setfrequency(card, card->current_frequency); 187 card->mute = false; 188 } 189} 190 191static int gemtek_pci_getsignal(struct gemtek_pci *card) 192{ 193 int sig; 194 195 mutex_lock(&card->lock); 196 sig = (inb(card->iobase) & 0x08) ? 0 : 1; 197 mutex_unlock(&card->lock); 198 return sig; 199} 200 201static int vidioc_querycap(struct file *file, void *priv, 202 struct v4l2_capability *v) 203{ 204 struct gemtek_pci *card = video_drvdata(file); 205 206 strlcpy(v->driver, "radio-gemtek-pci", sizeof(v->driver)); 207 strlcpy(v->card, "GemTek PCI Radio", sizeof(v->card)); 208 snprintf(v->bus_info, sizeof(v->bus_info), "PCI:%s", pci_name(card->pdev)); 209 v->version = RADIO_VERSION; 210 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; 211 return 0; 212} 213 214static int vidioc_g_tuner(struct file *file, void *priv, 215 struct v4l2_tuner *v) 216{ 217 struct gemtek_pci *card = video_drvdata(file); 218 219 if (v->index > 0) 220 return -EINVAL; 221 222 strlcpy(v->name, "FM", sizeof(v->name)); 223 v->type = V4L2_TUNER_RADIO; 224 v->rangelow = GEMTEK_PCI_RANGE_LOW; 225 v->rangehigh = GEMTEK_PCI_RANGE_HIGH; 226 v->rxsubchans = V4L2_TUNER_SUB_MONO; 227 v->capability = V4L2_TUNER_CAP_LOW; 228 v->audmode = V4L2_TUNER_MODE_MONO; 229 v->signal = 0xffff * gemtek_pci_getsignal(card); 230 return 0; 231} 232 233static int vidioc_s_tuner(struct file *file, void *priv, 234 struct v4l2_tuner *v) 235{ 236 return v->index ? -EINVAL : 0; 237} 238 239static int vidioc_s_frequency(struct file *file, void *priv, 240 struct v4l2_frequency *f) 241{ 242 struct gemtek_pci *card = video_drvdata(file); 243 244 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) 245 return -EINVAL; 246 if (f->frequency < GEMTEK_PCI_RANGE_LOW || 247 f->frequency > GEMTEK_PCI_RANGE_HIGH) 248 return -EINVAL; 249 gemtek_pci_setfrequency(card, f->frequency); 250 card->mute = false; 251 return 0; 252} 253 254static int vidioc_g_frequency(struct file *file, void *priv, 255 struct v4l2_frequency *f) 256{ 257 struct gemtek_pci *card = video_drvdata(file); 258 259 if (f->tuner != 0) 260 return -EINVAL; 261 f->type = V4L2_TUNER_RADIO; 262 f->frequency = card->current_frequency; 263 return 0; 264} 265 266static int vidioc_queryctrl(struct file *file, void *priv, 267 struct v4l2_queryctrl *qc) 268{ 269 switch (qc->id) { 270 case V4L2_CID_AUDIO_MUTE: 271 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); 272 case V4L2_CID_AUDIO_VOLUME: 273 return v4l2_ctrl_query_fill(qc, 0, 65535, 65535, 65535); 274 } 275 return -EINVAL; 276} 277 278static int vidioc_g_ctrl(struct file *file, void *priv, 279 struct v4l2_control *ctrl) 280{ 281 struct gemtek_pci *card = video_drvdata(file); 282 283 switch (ctrl->id) { 284 case V4L2_CID_AUDIO_MUTE: 285 ctrl->value = card->mute; 286 return 0; 287 case V4L2_CID_AUDIO_VOLUME: 288 if (card->mute) 289 ctrl->value = 0; 290 else 291 ctrl->value = 65535; 292 return 0; 293 } 294 return -EINVAL; 295} 296 297static int vidioc_s_ctrl(struct file *file, void *priv, 298 struct v4l2_control *ctrl) 299{ 300 struct gemtek_pci *card = video_drvdata(file); 301 302 switch (ctrl->id) { 303 case V4L2_CID_AUDIO_MUTE: 304 if (ctrl->value) 305 gemtek_pci_mute(card); 306 else 307 gemtek_pci_unmute(card); 308 return 0; 309 case V4L2_CID_AUDIO_VOLUME: 310 if (ctrl->value) 311 gemtek_pci_unmute(card); 312 else 313 gemtek_pci_mute(card); 314 return 0; 315 } 316 return -EINVAL; 317} 318 319static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) 320{ 321 *i = 0; 322 return 0; 323} 324 325static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) 326{ 327 return i ? -EINVAL : 0; 328} 329 330static int vidioc_g_audio(struct file *file, void *priv, 331 struct v4l2_audio *a) 332{ 333 a->index = 0; 334 strlcpy(a->name, "Radio", sizeof(a->name)); 335 a->capability = V4L2_AUDCAP_STEREO; 336 return 0; 337} 338 339static int vidioc_s_audio(struct file *file, void *priv, 340 struct v4l2_audio *a) 341{ 342 return a->index ? -EINVAL : 0; 343} 344 345enum { 346 GEMTEK_PR103 347}; 348 349static char *card_names[] __devinitdata = { 350 "GEMTEK_PR103" 351}; 352 353static struct pci_device_id gemtek_pci_id[] = 354{ 355 { PCI_VENDOR_ID_GEMTEK, PCI_DEVICE_ID_GEMTEK_PR103, 356 PCI_ANY_ID, PCI_ANY_ID, 0, 0, GEMTEK_PR103 }, 357 { 0 } 358}; 359 360MODULE_DEVICE_TABLE(pci, gemtek_pci_id); 361 362static const struct v4l2_file_operations gemtek_pci_fops = { 363 .owner = THIS_MODULE, 364 .ioctl = video_ioctl2, 365}; 366 367static const struct v4l2_ioctl_ops gemtek_pci_ioctl_ops = { 368 .vidioc_querycap = vidioc_querycap, 369 .vidioc_g_tuner = vidioc_g_tuner, 370 .vidioc_s_tuner = vidioc_s_tuner, 371 .vidioc_g_audio = vidioc_g_audio, 372 .vidioc_s_audio = vidioc_s_audio, 373 .vidioc_g_input = vidioc_g_input, 374 .vidioc_s_input = vidioc_s_input, 375 .vidioc_g_frequency = vidioc_g_frequency, 376 .vidioc_s_frequency = vidioc_s_frequency, 377 .vidioc_queryctrl = vidioc_queryctrl, 378 .vidioc_g_ctrl = vidioc_g_ctrl, 379 .vidioc_s_ctrl = vidioc_s_ctrl, 380}; 381 382static int __devinit gemtek_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id) 383{ 384 struct gemtek_pci *card; 385 struct v4l2_device *v4l2_dev; 386 int res; 387 388 card = kzalloc(sizeof(struct gemtek_pci), GFP_KERNEL); 389 if (card == NULL) { 390 dev_err(&pdev->dev, "out of memory\n"); 391 return -ENOMEM; 392 } 393 394 v4l2_dev = &card->v4l2_dev; 395 mutex_init(&card->lock); 396 card->pdev = pdev; 397 398 strlcpy(v4l2_dev->name, "gemtek_pci", sizeof(v4l2_dev->name)); 399 400 res = v4l2_device_register(&pdev->dev, v4l2_dev); 401 if (res < 0) { 402 v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); 403 kfree(card); 404 return res; 405 } 406 407 if (pci_enable_device(pdev)) 408 goto err_pci; 409 410 card->iobase = pci_resource_start(pdev, 0); 411 card->length = pci_resource_len(pdev, 0); 412 413 if (request_region(card->iobase, card->length, card_names[pci_id->driver_data]) == NULL) { 414 v4l2_err(v4l2_dev, "i/o port already in use\n"); 415 goto err_pci; 416 } 417 418 strlcpy(card->vdev.name, v4l2_dev->name, sizeof(card->vdev.name)); 419 card->vdev.v4l2_dev = v4l2_dev; 420 card->vdev.fops = &gemtek_pci_fops; 421 card->vdev.ioctl_ops = &gemtek_pci_ioctl_ops; 422 card->vdev.release = video_device_release_empty; 423 video_set_drvdata(&card->vdev, card); 424 425 if (video_register_device(&card->vdev, VFL_TYPE_RADIO, nr_radio) < 0) 426 goto err_video; 427 428 gemtek_pci_mute(card); 429 430 v4l2_info(v4l2_dev, "Gemtek PCI Radio (rev. %d) found at 0x%04x-0x%04x.\n", 431 pdev->revision, card->iobase, card->iobase + card->length - 1); 432 433 return 0; 434 435err_video: 436 release_region(card->iobase, card->length); 437 438err_pci: 439 v4l2_device_unregister(v4l2_dev); 440 kfree(card); 441 return -ENODEV; 442} 443 444static void __devexit gemtek_pci_remove(struct pci_dev *pdev) 445{ 446 struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev); 447 struct gemtek_pci *card = to_gemtek_pci(v4l2_dev); 448 449 video_unregister_device(&card->vdev); 450 v4l2_device_unregister(v4l2_dev); 451 452 release_region(card->iobase, card->length); 453 454 if (mx) 455 gemtek_pci_mute(card); 456 457 kfree(card); 458} 459 460static struct pci_driver gemtek_pci_driver = { 461 .name = "gemtek_pci", 462 .id_table = gemtek_pci_id, 463 .probe = gemtek_pci_probe, 464 .remove = __devexit_p(gemtek_pci_remove), 465}; 466 467static int __init gemtek_pci_init(void) 468{ 469 return pci_register_driver(&gemtek_pci_driver); 470} 471 472static void __exit gemtek_pci_exit(void) 473{ 474 pci_unregister_driver(&gemtek_pci_driver); 475} 476 477module_init(gemtek_pci_init); 478module_exit(gemtek_pci_exit); 479