1 /* SF16FMI 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.cox@linux.org> 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 SF16FMI 15 * 16 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org> 17 */ 18 19 #include <linux/version.h> 20 #include <linux/kernel.h> /* __setup */ 21 #include <linux/module.h> /* Modules */ 22 #include <linux/init.h> /* Initdata */ 23 #include <linux/ioport.h> /* request_region */ 24 #include <linux/delay.h> /* udelay */ 25 #include <linux/videodev2.h> /* kernel radio structs */ 26 #include <media/v4l2-common.h> 27 #include <media/v4l2-ioctl.h> 28 #include <linux/isapnp.h> 29 #include <asm/io.h> /* outb, outb_p */ 30 #include <asm/uaccess.h> /* copy to/from user */ 31 #include <linux/mutex.h> 32 33 #define RADIO_VERSION KERNEL_VERSION(0,0,2) 34 35 static struct v4l2_queryctrl radio_qctrl[] = { 36 { 37 .id = V4L2_CID_AUDIO_MUTE, 38 .name = "Mute", 39 .minimum = 0, 40 .maximum = 1, 41 .default_value = 1, 42 .type = V4L2_CTRL_TYPE_BOOLEAN, 43 } 44 }; 45 46 struct fmi_device 47 { 48 int port; 49 int curvol; /* 1 or 0 */ 50 unsigned long curfreq; /* freq in kHz */ 51 __u32 flags; 52 }; 53 54 static int io = -1; 55 static int radio_nr = -1; 56 static struct pnp_dev *dev = NULL; 57 static struct mutex lock; 58 59 /* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */ 60 /* It is only useful to give freq in intervall of 800 (=0.05Mhz), 61 * other bits will be truncated, e.g 92.7400016 -> 92.7, but 62 * 92.7400017 -> 92.75 63 */ 64 #define RSF16_ENCODE(x) ((x)/800+214) 65 #define RSF16_MINFREQ 87*16000 66 #define RSF16_MAXFREQ 108*16000 67 68 static void outbits(int bits, unsigned int data, int port) 69 { 70 while(bits--) { 71 if(data & 1) { 72 outb(5, port); 73 udelay(6); 74 outb(7, port); 75 udelay(6); 76 } else { 77 outb(1, port); 78 udelay(6); 79 outb(3, port); 80 udelay(6); 81 } 82 data>>=1; 83 } 84 } 85 86 static inline void fmi_mute(int port) 87 { 88 mutex_lock(&lock); 89 outb(0x00, port); 90 mutex_unlock(&lock); 91 } 92 93 static inline void fmi_unmute(int port) 94 { 95 mutex_lock(&lock); 96 outb(0x08, port); 97 mutex_unlock(&lock); 98 } 99 100 static inline int fmi_setfreq(struct fmi_device *dev) 101 { 102 int myport = dev->port; 103 unsigned long freq = dev->curfreq; 104 105 mutex_lock(&lock); 106 107 outbits(16, RSF16_ENCODE(freq), myport); 108 outbits(8, 0xC0, myport); 109 msleep(143); /* was schedule_timeout(HZ/7) */ 110 mutex_unlock(&lock); 111 if (dev->curvol) fmi_unmute(myport); 112 return 0; 113 } 114 115 static inline int fmi_getsigstr(struct fmi_device *dev) 116 { 117 int val; 118 int res; 119 int myport = dev->port; 120 121 122 mutex_lock(&lock); 123 val = dev->curvol ? 0x08 : 0x00; /* unmute/mute */ 124 outb(val, myport); 125 outb(val | 0x10, myport); 126 msleep(143); /* was schedule_timeout(HZ/7) */ 127 res = (int)inb(myport+1); 128 outb(val, myport); 129 130 mutex_unlock(&lock); 131 return (res & 2) ? 0 : 0xFFFF; 132 } 133 134 static int vidioc_querycap(struct file *file, void *priv, 135 struct v4l2_capability *v) 136 { 137 strlcpy(v->driver, "radio-sf16fmi", sizeof(v->driver)); 138 strlcpy(v->card, "SF16-FMx radio", sizeof(v->card)); 139 sprintf(v->bus_info, "ISA"); 140 v->version = RADIO_VERSION; 141 v->capabilities = V4L2_CAP_TUNER; 142 return 0; 143 } 144 145 static int vidioc_g_tuner(struct file *file, void *priv, 146 struct v4l2_tuner *v) 147 { 148 int mult; 149 struct video_device *dev = video_devdata(file); 150 struct fmi_device *fmi = dev->priv; 151 152 if (v->index > 0) 153 return -EINVAL; 154 155 strcpy(v->name, "FM"); 156 v->type = V4L2_TUNER_RADIO; 157 mult = (fmi->flags & V4L2_TUNER_CAP_LOW) ? 1 : 1000; 158 v->rangelow = RSF16_MINFREQ/mult; 159 v->rangehigh = RSF16_MAXFREQ/mult; 160 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_MODE_STEREO; 161 v->capability = fmi->flags&V4L2_TUNER_CAP_LOW; 162 v->audmode = V4L2_TUNER_MODE_STEREO; 163 v->signal = fmi_getsigstr(fmi); 164 return 0; 165 } 166 167 static int vidioc_s_tuner(struct file *file, void *priv, 168 struct v4l2_tuner *v) 169 { 170 if (v->index > 0) 171 return -EINVAL; 172 return 0; 173 } 174 175 static int vidioc_s_frequency(struct file *file, void *priv, 176 struct v4l2_frequency *f) 177 { 178 struct video_device *dev = video_devdata(file); 179 struct fmi_device *fmi = dev->priv; 180 181 if (!(fmi->flags & V4L2_TUNER_CAP_LOW)) 182 f->frequency *= 1000; 183 if (f->frequency < RSF16_MINFREQ || 184 f->frequency > RSF16_MAXFREQ ) 185 return -EINVAL; 186 /*rounding in steps of 800 to match th freq 187 that will be used */ 188 fmi->curfreq = (f->frequency/800)*800; 189 fmi_setfreq(fmi); 190 return 0; 191 } 192 193 static int vidioc_g_frequency(struct file *file, void *priv, 194 struct v4l2_frequency *f) 195 { 196 struct video_device *dev = video_devdata(file); 197 struct fmi_device *fmi = dev->priv; 198 199 f->type = V4L2_TUNER_RADIO; 200 f->frequency = fmi->curfreq; 201 if (!(fmi->flags & V4L2_TUNER_CAP_LOW)) 202 f->frequency /= 1000; 203 return 0; 204 } 205 206 static int vidioc_queryctrl(struct file *file, void *priv, 207 struct v4l2_queryctrl *qc) 208 { 209 int i; 210 211 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { 212 if (qc->id && qc->id == radio_qctrl[i].id) { 213 memcpy(qc, &(radio_qctrl[i]), 214 sizeof(*qc)); 215 return 0; 216 } 217 } 218 return -EINVAL; 219 } 220 221 static int vidioc_g_ctrl(struct file *file, void *priv, 222 struct v4l2_control *ctrl) 223 { 224 struct video_device *dev = video_devdata(file); 225 struct fmi_device *fmi = dev->priv; 226 227 switch (ctrl->id) { 228 case V4L2_CID_AUDIO_MUTE: 229 ctrl->value = fmi->curvol; 230 return 0; 231 } 232 return -EINVAL; 233 } 234 235 static int vidioc_s_ctrl(struct file *file, void *priv, 236 struct v4l2_control *ctrl) 237 { 238 struct video_device *dev = video_devdata(file); 239 struct fmi_device *fmi = dev->priv; 240 241 switch (ctrl->id) { 242 case V4L2_CID_AUDIO_MUTE: 243 if (ctrl->value) 244 fmi_mute(fmi->port); 245 else 246 fmi_unmute(fmi->port); 247 fmi->curvol = ctrl->value; 248 return 0; 249 } 250 return -EINVAL; 251 } 252 253 static int vidioc_g_audio(struct file *file, void *priv, 254 struct v4l2_audio *a) 255 { 256 if (a->index > 1) 257 return -EINVAL; 258 259 strcpy(a->name, "Radio"); 260 a->capability = V4L2_AUDCAP_STEREO; 261 return 0; 262 } 263 264 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) 265 { 266 *i = 0; 267 return 0; 268 } 269 270 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) 271 { 272 if (i != 0) 273 return -EINVAL; 274 return 0; 275 } 276 277 static int vidioc_s_audio(struct file *file, void *priv, 278 struct v4l2_audio *a) 279 { 280 if (a->index != 0) 281 return -EINVAL; 282 return 0; 283 } 284 285 static struct fmi_device fmi_unit; 286 287 static const struct file_operations fmi_fops = { 288 .owner = THIS_MODULE, 289 .open = video_exclusive_open, 290 .release = video_exclusive_release, 291 .ioctl = video_ioctl2, 292 #ifdef CONFIG_COMPAT 293 .compat_ioctl = v4l_compat_ioctl32, 294 #endif 295 .llseek = no_llseek, 296 }; 297 298 static const struct v4l2_ioctl_ops fmi_ioctl_ops = { 299 .vidioc_querycap = vidioc_querycap, 300 .vidioc_g_tuner = vidioc_g_tuner, 301 .vidioc_s_tuner = vidioc_s_tuner, 302 .vidioc_g_audio = vidioc_g_audio, 303 .vidioc_s_audio = vidioc_s_audio, 304 .vidioc_g_input = vidioc_g_input, 305 .vidioc_s_input = vidioc_s_input, 306 .vidioc_g_frequency = vidioc_g_frequency, 307 .vidioc_s_frequency = vidioc_s_frequency, 308 .vidioc_queryctrl = vidioc_queryctrl, 309 .vidioc_g_ctrl = vidioc_g_ctrl, 310 .vidioc_s_ctrl = vidioc_s_ctrl, 311 }; 312 313 static struct video_device fmi_radio = { 314 .name = "SF16FMx radio", 315 .fops = &fmi_fops, 316 .ioctl_ops = &fmi_ioctl_ops, 317 }; 318 319 /* ladis: this is my card. does any other types exist? */ 320 static struct isapnp_device_id id_table[] __devinitdata = { 321 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, 322 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0}, 323 { ISAPNP_CARD_END, }, 324 }; 325 326 MODULE_DEVICE_TABLE(isapnp, id_table); 327 328 static int __init isapnp_fmi_probe(void) 329 { 330 int i = 0; 331 332 while (id_table[i].card_vendor != 0 && dev == NULL) { 333 dev = pnp_find_dev(NULL, id_table[i].vendor, 334 id_table[i].function, NULL); 335 i++; 336 } 337 338 if (!dev) 339 return -ENODEV; 340 if (pnp_device_attach(dev) < 0) 341 return -EAGAIN; 342 if (pnp_activate_dev(dev) < 0) { 343 printk ("radio-sf16fmi: PnP configure failed (out of resources?)\n"); 344 pnp_device_detach(dev); 345 return -ENOMEM; 346 } 347 if (!pnp_port_valid(dev, 0)) { 348 pnp_device_detach(dev); 349 return -ENODEV; 350 } 351 352 i = pnp_port_start(dev, 0); 353 printk ("radio-sf16fmi: PnP reports card at %#x\n", i); 354 355 return i; 356 } 357 358 static int __init fmi_init(void) 359 { 360 if (io < 0) 361 io = isapnp_fmi_probe(); 362 if (io < 0) { 363 printk(KERN_ERR "radio-sf16fmi: No PnP card found.\n"); 364 return io; 365 } 366 if (!request_region(io, 2, "radio-sf16fmi")) { 367 printk(KERN_ERR "radio-sf16fmi: port 0x%x already in use\n", io); 368 pnp_device_detach(dev); 369 return -EBUSY; 370 } 371 372 fmi_unit.port = io; 373 fmi_unit.curvol = 0; 374 fmi_unit.curfreq = 0; 375 fmi_unit.flags = V4L2_TUNER_CAP_LOW; 376 fmi_radio.priv = &fmi_unit; 377 378 mutex_init(&lock); 379 380 if (video_register_device(&fmi_radio, VFL_TYPE_RADIO, radio_nr) < 0) { 381 release_region(io, 2); 382 return -EINVAL; 383 } 384 385 printk(KERN_INFO "SF16FMx radio card driver at 0x%x\n", io); 386 /* mute card - prevents noisy bootups */ 387 fmi_mute(io); 388 return 0; 389 } 390 391 MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood"); 392 MODULE_DESCRIPTION("A driver for the SF16MI radio."); 393 MODULE_LICENSE("GPL"); 394 395 module_param(io, int, 0); 396 MODULE_PARM_DESC(io, "I/O address of the SF16MI card (0x284 or 0x384)"); 397 module_param(radio_nr, int, 0); 398 399 static void __exit fmi_cleanup_module(void) 400 { 401 video_unregister_device(&fmi_radio); 402 release_region(io, 2); 403 if (dev) 404 pnp_device_detach(dev); 405 } 406 407 module_init(fmi_init); 408 module_exit(fmi_cleanup_module); 409