1 /* SF16-FMI and SF16-FMP radio driver for Linux radio support 2 * heavily based on rtrack driver... 3 * (c) 1997 M. Kirkwood 4 * (c) 1998 Petr Vandrovec, vandrove@vc.cvut.cz 5 * 6 * Fitted to new interface by Alan Cox <alan@lxorguk.ukuu.org.uk> 7 * Made working and cleaned up functions <mikael.hedin@irf.se> 8 * Support for ISAPnP by Ladislav Michl <ladis@psi.cz> 9 * 10 * Notes on the hardware 11 * 12 * Frequency control is done digitally -- ie out(port,encodefreq(95.8)); 13 * No volume control - only mute/unmute - you have to use line volume 14 * control on SB-part of SF16-FMI/SF16-FMP 15 * 16 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org> 17 */ 18 19 #include <linux/kernel.h> /* __setup */ 20 #include <linux/module.h> /* Modules */ 21 #include <linux/init.h> /* Initdata */ 22 #include <linux/ioport.h> /* request_region */ 23 #include <linux/delay.h> /* udelay */ 24 #include <linux/isapnp.h> 25 #include <linux/mutex.h> 26 #include <linux/videodev2.h> /* kernel radio structs */ 27 #include <linux/io.h> /* outb, outb_p */ 28 #include <media/v4l2-device.h> 29 #include <media/v4l2-ioctl.h> 30 31 MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood"); 32 MODULE_DESCRIPTION("A driver for the SF16-FMI and SF16-FMP radio."); 33 MODULE_LICENSE("GPL"); 34 MODULE_VERSION("0.0.3"); 35 36 static int io = -1; 37 static int radio_nr = -1; 38 39 module_param(io, int, 0); 40 MODULE_PARM_DESC(io, "I/O address of the SF16-FMI or SF16-FMP card (0x284 or 0x384)"); 41 module_param(radio_nr, int, 0); 42 43 struct fmi 44 { 45 struct v4l2_device v4l2_dev; 46 struct video_device vdev; 47 int io; 48 bool mute; 49 unsigned long curfreq; /* freq in kHz */ 50 struct mutex lock; 51 }; 52 53 static struct fmi fmi_card; 54 static struct pnp_dev *dev; 55 bool pnp_attached; 56 57 /* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */ 58 /* It is only useful to give freq in interval of 800 (=0.05Mhz), 59 * other bits will be truncated, e.g 92.7400016 -> 92.7, but 60 * 92.7400017 -> 92.75 61 */ 62 #define RSF16_ENCODE(x) ((x) / 800 + 214) 63 #define RSF16_MINFREQ (87 * 16000) 64 #define RSF16_MAXFREQ (108 * 16000) 65 66 static void outbits(int bits, unsigned int data, int io) 67 { 68 while (bits--) { 69 if (data & 1) { 70 outb(5, io); 71 udelay(6); 72 outb(7, io); 73 udelay(6); 74 } else { 75 outb(1, io); 76 udelay(6); 77 outb(3, io); 78 udelay(6); 79 } 80 data >>= 1; 81 } 82 } 83 84 static inline void fmi_mute(struct fmi *fmi) 85 { 86 mutex_lock(&fmi->lock); 87 outb(0x00, fmi->io); 88 mutex_unlock(&fmi->lock); 89 } 90 91 static inline void fmi_unmute(struct fmi *fmi) 92 { 93 mutex_lock(&fmi->lock); 94 outb(0x08, fmi->io); 95 mutex_unlock(&fmi->lock); 96 } 97 98 static inline int fmi_setfreq(struct fmi *fmi, unsigned long freq) 99 { 100 mutex_lock(&fmi->lock); 101 fmi->curfreq = freq; 102 103 outbits(16, RSF16_ENCODE(freq), fmi->io); 104 outbits(8, 0xC0, fmi->io); 105 msleep(143); /* was schedule_timeout(HZ/7) */ 106 mutex_unlock(&fmi->lock); 107 if (!fmi->mute) 108 fmi_unmute(fmi); 109 return 0; 110 } 111 112 static inline int fmi_getsigstr(struct fmi *fmi) 113 { 114 int val; 115 int res; 116 117 mutex_lock(&fmi->lock); 118 val = fmi->mute ? 0x00 : 0x08; /* mute/unmute */ 119 outb(val, fmi->io); 120 outb(val | 0x10, fmi->io); 121 msleep(143); /* was schedule_timeout(HZ/7) */ 122 res = (int)inb(fmi->io + 1); 123 outb(val, fmi->io); 124 125 mutex_unlock(&fmi->lock); 126 return (res & 2) ? 0 : 0xFFFF; 127 } 128 129 static int vidioc_querycap(struct file *file, void *priv, 130 struct v4l2_capability *v) 131 { 132 strlcpy(v->driver, "radio-sf16fmi", sizeof(v->driver)); 133 strlcpy(v->card, "SF16-FMx radio", sizeof(v->card)); 134 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info)); 135 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; 136 return 0; 137 } 138 139 static int vidioc_g_tuner(struct file *file, void *priv, 140 struct v4l2_tuner *v) 141 { 142 struct fmi *fmi = video_drvdata(file); 143 144 if (v->index > 0) 145 return -EINVAL; 146 147 strlcpy(v->name, "FM", sizeof(v->name)); 148 v->type = V4L2_TUNER_RADIO; 149 v->rangelow = RSF16_MINFREQ; 150 v->rangehigh = RSF16_MAXFREQ; 151 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; 152 v->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW; 153 v->audmode = V4L2_TUNER_MODE_STEREO; 154 v->signal = fmi_getsigstr(fmi); 155 return 0; 156 } 157 158 static int vidioc_s_tuner(struct file *file, void *priv, 159 struct v4l2_tuner *v) 160 { 161 return v->index ? -EINVAL : 0; 162 } 163 164 static int vidioc_s_frequency(struct file *file, void *priv, 165 struct v4l2_frequency *f) 166 { 167 struct fmi *fmi = video_drvdata(file); 168 169 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) 170 return -EINVAL; 171 if (f->frequency < RSF16_MINFREQ || 172 f->frequency > RSF16_MAXFREQ) 173 return -EINVAL; 174 /* rounding in steps of 800 to match the freq 175 that will be used */ 176 fmi_setfreq(fmi, (f->frequency / 800) * 800); 177 return 0; 178 } 179 180 static int vidioc_g_frequency(struct file *file, void *priv, 181 struct v4l2_frequency *f) 182 { 183 struct fmi *fmi = video_drvdata(file); 184 185 if (f->tuner != 0) 186 return -EINVAL; 187 f->type = V4L2_TUNER_RADIO; 188 f->frequency = fmi->curfreq; 189 return 0; 190 } 191 192 static int vidioc_queryctrl(struct file *file, void *priv, 193 struct v4l2_queryctrl *qc) 194 { 195 switch (qc->id) { 196 case V4L2_CID_AUDIO_MUTE: 197 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); 198 } 199 return -EINVAL; 200 } 201 202 static int vidioc_g_ctrl(struct file *file, void *priv, 203 struct v4l2_control *ctrl) 204 { 205 struct fmi *fmi = video_drvdata(file); 206 207 switch (ctrl->id) { 208 case V4L2_CID_AUDIO_MUTE: 209 ctrl->value = fmi->mute; 210 return 0; 211 } 212 return -EINVAL; 213 } 214 215 static int vidioc_s_ctrl(struct file *file, void *priv, 216 struct v4l2_control *ctrl) 217 { 218 struct fmi *fmi = video_drvdata(file); 219 220 switch (ctrl->id) { 221 case V4L2_CID_AUDIO_MUTE: 222 if (ctrl->value) 223 fmi_mute(fmi); 224 else 225 fmi_unmute(fmi); 226 fmi->mute = ctrl->value; 227 return 0; 228 } 229 return -EINVAL; 230 } 231 232 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) 233 { 234 *i = 0; 235 return 0; 236 } 237 238 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) 239 { 240 return i ? -EINVAL : 0; 241 } 242 243 static int vidioc_g_audio(struct file *file, void *priv, 244 struct v4l2_audio *a) 245 { 246 a->index = 0; 247 strlcpy(a->name, "Radio", sizeof(a->name)); 248 a->capability = V4L2_AUDCAP_STEREO; 249 return 0; 250 } 251 252 static int vidioc_s_audio(struct file *file, void *priv, 253 struct v4l2_audio *a) 254 { 255 return a->index ? -EINVAL : 0; 256 } 257 258 static const struct v4l2_file_operations fmi_fops = { 259 .owner = THIS_MODULE, 260 .unlocked_ioctl = video_ioctl2, 261 }; 262 263 static const struct v4l2_ioctl_ops fmi_ioctl_ops = { 264 .vidioc_querycap = vidioc_querycap, 265 .vidioc_g_tuner = vidioc_g_tuner, 266 .vidioc_s_tuner = vidioc_s_tuner, 267 .vidioc_g_audio = vidioc_g_audio, 268 .vidioc_s_audio = vidioc_s_audio, 269 .vidioc_g_input = vidioc_g_input, 270 .vidioc_s_input = vidioc_s_input, 271 .vidioc_g_frequency = vidioc_g_frequency, 272 .vidioc_s_frequency = vidioc_s_frequency, 273 .vidioc_queryctrl = vidioc_queryctrl, 274 .vidioc_g_ctrl = vidioc_g_ctrl, 275 .vidioc_s_ctrl = vidioc_s_ctrl, 276 }; 277 278 /* ladis: this is my card. does any other types exist? */ 279 static struct isapnp_device_id id_table[] __devinitdata = { 280 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, 281 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0}, 282 { ISAPNP_CARD_END, }, 283 }; 284 285 MODULE_DEVICE_TABLE(isapnp, id_table); 286 287 static int __init isapnp_fmi_probe(void) 288 { 289 int i = 0; 290 291 while (id_table[i].card_vendor != 0 && dev == NULL) { 292 dev = pnp_find_dev(NULL, id_table[i].vendor, 293 id_table[i].function, NULL); 294 i++; 295 } 296 297 if (!dev) 298 return -ENODEV; 299 if (pnp_device_attach(dev) < 0) 300 return -EAGAIN; 301 if (pnp_activate_dev(dev) < 0) { 302 printk(KERN_ERR "radio-sf16fmi: PnP configure failed (out of resources?)\n"); 303 pnp_device_detach(dev); 304 return -ENOMEM; 305 } 306 if (!pnp_port_valid(dev, 0)) { 307 pnp_device_detach(dev); 308 return -ENODEV; 309 } 310 311 i = pnp_port_start(dev, 0); 312 printk(KERN_INFO "radio-sf16fmi: PnP reports card at %#x\n", i); 313 314 return i; 315 } 316 317 static int __init fmi_init(void) 318 { 319 struct fmi *fmi = &fmi_card; 320 struct v4l2_device *v4l2_dev = &fmi->v4l2_dev; 321 int res, i; 322 int probe_ports[] = { 0, 0x284, 0x384 }; 323 324 if (io < 0) { 325 for (i = 0; i < ARRAY_SIZE(probe_ports); i++) { 326 io = probe_ports[i]; 327 if (io == 0) { 328 io = isapnp_fmi_probe(); 329 if (io < 0) 330 continue; 331 pnp_attached = 1; 332 } 333 if (!request_region(io, 2, "radio-sf16fmi")) { 334 if (pnp_attached) 335 pnp_device_detach(dev); 336 io = -1; 337 continue; 338 } 339 if (pnp_attached || 340 ((inb(io) & 0xf9) == 0xf9 && (inb(io) & 0x4) == 0)) 341 break; 342 release_region(io, 2); 343 io = -1; 344 } 345 } else { 346 if (!request_region(io, 2, "radio-sf16fmi")) { 347 printk(KERN_ERR "radio-sf16fmi: port %#x already in use\n", io); 348 return -EBUSY; 349 } 350 if (inb(io) == 0xff) { 351 printk(KERN_ERR "radio-sf16fmi: card not present at %#x\n", io); 352 release_region(io, 2); 353 return -ENODEV; 354 } 355 } 356 if (io < 0) { 357 printk(KERN_ERR "radio-sf16fmi: no cards found\n"); 358 return -ENODEV; 359 } 360 361 strlcpy(v4l2_dev->name, "sf16fmi", sizeof(v4l2_dev->name)); 362 fmi->io = io; 363 364 res = v4l2_device_register(NULL, v4l2_dev); 365 if (res < 0) { 366 release_region(fmi->io, 2); 367 if (pnp_attached) 368 pnp_device_detach(dev); 369 v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); 370 return res; 371 } 372 373 strlcpy(fmi->vdev.name, v4l2_dev->name, sizeof(fmi->vdev.name)); 374 fmi->vdev.v4l2_dev = v4l2_dev; 375 fmi->vdev.fops = &fmi_fops; 376 fmi->vdev.ioctl_ops = &fmi_ioctl_ops; 377 fmi->vdev.release = video_device_release_empty; 378 video_set_drvdata(&fmi->vdev, fmi); 379 380 mutex_init(&fmi->lock); 381 382 /* mute card - prevents noisy bootups */ 383 fmi_mute(fmi); 384 385 if (video_register_device(&fmi->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { 386 v4l2_device_unregister(v4l2_dev); 387 release_region(fmi->io, 2); 388 if (pnp_attached) 389 pnp_device_detach(dev); 390 return -EINVAL; 391 } 392 393 v4l2_info(v4l2_dev, "card driver at 0x%x\n", fmi->io); 394 return 0; 395 } 396 397 static void __exit fmi_exit(void) 398 { 399 struct fmi *fmi = &fmi_card; 400 401 video_unregister_device(&fmi->vdev); 402 v4l2_device_unregister(&fmi->v4l2_dev); 403 release_region(fmi->io, 2); 404 if (dev && pnp_attached) 405 pnp_device_detach(dev); 406 } 407 408 module_init(fmi_init); 409 module_exit(fmi_exit); 410