1 /* SF16-FMI, SF16-FMP and SF16-FMD 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/SF16-FMD 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 #include <media/v4l2-ctrls.h> 31 #include <media/v4l2-event.h> 32 #include "lm7000.h" 33 34 MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood"); 35 MODULE_DESCRIPTION("A driver for the SF16-FMI, SF16-FMP and SF16-FMD radio."); 36 MODULE_LICENSE("GPL"); 37 MODULE_VERSION("0.0.3"); 38 39 static int io = -1; 40 static int radio_nr = -1; 41 42 module_param(io, int, 0); 43 MODULE_PARM_DESC(io, "I/O address of the SF16-FMI/SF16-FMP/SF16-FMD card (0x284 or 0x384)"); 44 module_param(radio_nr, int, 0); 45 46 struct fmi 47 { 48 struct v4l2_device v4l2_dev; 49 struct v4l2_ctrl_handler hdl; 50 struct video_device vdev; 51 int io; 52 bool mute; 53 u32 curfreq; /* freq in kHz */ 54 struct mutex lock; 55 }; 56 57 static struct fmi fmi_card; 58 static struct pnp_dev *dev; 59 static bool pnp_attached; 60 61 #define RSF16_MINFREQ (87U * 16000) 62 #define RSF16_MAXFREQ (108U * 16000) 63 64 #define FMI_BIT_TUN_CE (1 << 0) 65 #define FMI_BIT_TUN_CLK (1 << 1) 66 #define FMI_BIT_TUN_DATA (1 << 2) 67 #define FMI_BIT_VOL_SW (1 << 3) 68 #define FMI_BIT_TUN_STRQ (1 << 4) 69 70 static void fmi_set_pins(void *handle, u8 pins) 71 { 72 struct fmi *fmi = handle; 73 u8 bits = FMI_BIT_TUN_STRQ; 74 75 if (!fmi->mute) 76 bits |= FMI_BIT_VOL_SW; 77 78 if (pins & LM7000_DATA) 79 bits |= FMI_BIT_TUN_DATA; 80 if (pins & LM7000_CLK) 81 bits |= FMI_BIT_TUN_CLK; 82 if (pins & LM7000_CE) 83 bits |= FMI_BIT_TUN_CE; 84 85 mutex_lock(&fmi->lock); 86 outb_p(bits, fmi->io); 87 mutex_unlock(&fmi->lock); 88 } 89 90 static inline void fmi_mute(struct fmi *fmi) 91 { 92 mutex_lock(&fmi->lock); 93 outb(0x00, fmi->io); 94 mutex_unlock(&fmi->lock); 95 } 96 97 static inline void fmi_unmute(struct fmi *fmi) 98 { 99 mutex_lock(&fmi->lock); 100 outb(0x08, fmi->io); 101 mutex_unlock(&fmi->lock); 102 } 103 104 static inline int fmi_getsigstr(struct fmi *fmi) 105 { 106 int val; 107 int res; 108 109 mutex_lock(&fmi->lock); 110 val = fmi->mute ? 0x00 : 0x08; /* mute/unmute */ 111 outb(val, fmi->io); 112 outb(val | 0x10, fmi->io); 113 msleep(143); /* was schedule_timeout(HZ/7) */ 114 res = (int)inb(fmi->io + 1); 115 outb(val, fmi->io); 116 117 mutex_unlock(&fmi->lock); 118 return (res & 2) ? 0 : 0xFFFF; 119 } 120 121 static void fmi_set_freq(struct fmi *fmi) 122 { 123 fmi->curfreq = clamp(fmi->curfreq, RSF16_MINFREQ, RSF16_MAXFREQ); 124 /* rounding in steps of 800 to match the freq 125 that will be used */ 126 lm7000_set_freq((fmi->curfreq / 800) * 800, fmi, fmi_set_pins); 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-FMI/FMP/FMD radio", sizeof(v->card)); 134 strlcpy(v->bus_info, "ISA:radio-sf16fmi", sizeof(v->bus_info)); 135 v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO; 136 v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS; 137 return 0; 138 } 139 140 static int vidioc_g_tuner(struct file *file, void *priv, 141 struct v4l2_tuner *v) 142 { 143 struct fmi *fmi = video_drvdata(file); 144 145 if (v->index > 0) 146 return -EINVAL; 147 148 strlcpy(v->name, "FM", sizeof(v->name)); 149 v->type = V4L2_TUNER_RADIO; 150 v->rangelow = RSF16_MINFREQ; 151 v->rangehigh = RSF16_MAXFREQ; 152 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; 153 v->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW; 154 v->audmode = V4L2_TUNER_MODE_STEREO; 155 v->signal = fmi_getsigstr(fmi); 156 return 0; 157 } 158 159 static int vidioc_s_tuner(struct file *file, void *priv, 160 const struct v4l2_tuner *v) 161 { 162 return v->index ? -EINVAL : 0; 163 } 164 165 static int vidioc_s_frequency(struct file *file, void *priv, 166 const struct v4l2_frequency *f) 167 { 168 struct fmi *fmi = video_drvdata(file); 169 170 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) 171 return -EINVAL; 172 173 fmi->curfreq = f->frequency; 174 fmi_set_freq(fmi); 175 176 return 0; 177 } 178 179 static int vidioc_g_frequency(struct file *file, void *priv, 180 struct v4l2_frequency *f) 181 { 182 struct fmi *fmi = video_drvdata(file); 183 184 if (f->tuner != 0) 185 return -EINVAL; 186 f->type = V4L2_TUNER_RADIO; 187 f->frequency = fmi->curfreq; 188 return 0; 189 } 190 191 static int fmi_s_ctrl(struct v4l2_ctrl *ctrl) 192 { 193 struct fmi *fmi = container_of(ctrl->handler, struct fmi, hdl); 194 195 switch (ctrl->id) { 196 case V4L2_CID_AUDIO_MUTE: 197 if (ctrl->val) 198 fmi_mute(fmi); 199 else 200 fmi_unmute(fmi); 201 fmi->mute = ctrl->val; 202 return 0; 203 } 204 return -EINVAL; 205 } 206 207 static const struct v4l2_ctrl_ops fmi_ctrl_ops = { 208 .s_ctrl = fmi_s_ctrl, 209 }; 210 211 static const struct v4l2_file_operations fmi_fops = { 212 .owner = THIS_MODULE, 213 .open = v4l2_fh_open, 214 .release = v4l2_fh_release, 215 .poll = v4l2_ctrl_poll, 216 .unlocked_ioctl = video_ioctl2, 217 }; 218 219 static const struct v4l2_ioctl_ops fmi_ioctl_ops = { 220 .vidioc_querycap = vidioc_querycap, 221 .vidioc_g_tuner = vidioc_g_tuner, 222 .vidioc_s_tuner = vidioc_s_tuner, 223 .vidioc_g_frequency = vidioc_g_frequency, 224 .vidioc_s_frequency = vidioc_s_frequency, 225 .vidioc_log_status = v4l2_ctrl_log_status, 226 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 227 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 228 }; 229 230 /* ladis: this is my card. does any other types exist? */ 231 static struct isapnp_device_id id_table[] = { 232 /* SF16-FMI */ 233 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, 234 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0}, 235 /* SF16-FMD */ 236 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, 237 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad12), 0}, 238 { ISAPNP_CARD_END, }, 239 }; 240 241 MODULE_DEVICE_TABLE(isapnp, id_table); 242 243 static int __init isapnp_fmi_probe(void) 244 { 245 int i = 0; 246 247 while (id_table[i].card_vendor != 0 && dev == NULL) { 248 dev = pnp_find_dev(NULL, id_table[i].vendor, 249 id_table[i].function, NULL); 250 i++; 251 } 252 253 if (!dev) 254 return -ENODEV; 255 if (pnp_device_attach(dev) < 0) 256 return -EAGAIN; 257 if (pnp_activate_dev(dev) < 0) { 258 printk(KERN_ERR "radio-sf16fmi: PnP configure failed (out of resources?)\n"); 259 pnp_device_detach(dev); 260 return -ENOMEM; 261 } 262 if (!pnp_port_valid(dev, 0)) { 263 pnp_device_detach(dev); 264 return -ENODEV; 265 } 266 267 i = pnp_port_start(dev, 0); 268 printk(KERN_INFO "radio-sf16fmi: PnP reports card at %#x\n", i); 269 270 return i; 271 } 272 273 static int __init fmi_init(void) 274 { 275 struct fmi *fmi = &fmi_card; 276 struct v4l2_device *v4l2_dev = &fmi->v4l2_dev; 277 struct v4l2_ctrl_handler *hdl = &fmi->hdl; 278 int res, i; 279 int probe_ports[] = { 0, 0x284, 0x384 }; 280 281 if (io < 0) { 282 for (i = 0; i < ARRAY_SIZE(probe_ports); i++) { 283 io = probe_ports[i]; 284 if (io == 0) { 285 io = isapnp_fmi_probe(); 286 if (io < 0) 287 continue; 288 pnp_attached = true; 289 } 290 if (!request_region(io, 2, "radio-sf16fmi")) { 291 if (pnp_attached) 292 pnp_device_detach(dev); 293 io = -1; 294 continue; 295 } 296 if (pnp_attached || 297 ((inb(io) & 0xf9) == 0xf9 && (inb(io) & 0x4) == 0)) 298 break; 299 release_region(io, 2); 300 io = -1; 301 } 302 } else { 303 if (!request_region(io, 2, "radio-sf16fmi")) { 304 printk(KERN_ERR "radio-sf16fmi: port %#x already in use\n", io); 305 return -EBUSY; 306 } 307 if (inb(io) == 0xff) { 308 printk(KERN_ERR "radio-sf16fmi: card not present at %#x\n", io); 309 release_region(io, 2); 310 return -ENODEV; 311 } 312 } 313 if (io < 0) { 314 printk(KERN_ERR "radio-sf16fmi: no cards found\n"); 315 return -ENODEV; 316 } 317 318 strlcpy(v4l2_dev->name, "sf16fmi", sizeof(v4l2_dev->name)); 319 fmi->io = io; 320 321 res = v4l2_device_register(NULL, v4l2_dev); 322 if (res < 0) { 323 release_region(fmi->io, 2); 324 if (pnp_attached) 325 pnp_device_detach(dev); 326 v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); 327 return res; 328 } 329 330 v4l2_ctrl_handler_init(hdl, 1); 331 v4l2_ctrl_new_std(hdl, &fmi_ctrl_ops, 332 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); 333 v4l2_dev->ctrl_handler = hdl; 334 if (hdl->error) { 335 res = hdl->error; 336 v4l2_err(v4l2_dev, "Could not register controls\n"); 337 v4l2_ctrl_handler_free(hdl); 338 v4l2_device_unregister(v4l2_dev); 339 return res; 340 } 341 342 strlcpy(fmi->vdev.name, v4l2_dev->name, sizeof(fmi->vdev.name)); 343 fmi->vdev.v4l2_dev = v4l2_dev; 344 fmi->vdev.fops = &fmi_fops; 345 fmi->vdev.ioctl_ops = &fmi_ioctl_ops; 346 fmi->vdev.release = video_device_release_empty; 347 video_set_drvdata(&fmi->vdev, fmi); 348 349 mutex_init(&fmi->lock); 350 351 /* mute card and set default frequency */ 352 fmi->mute = true; 353 fmi->curfreq = RSF16_MINFREQ; 354 fmi_set_freq(fmi); 355 356 if (video_register_device(&fmi->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { 357 v4l2_ctrl_handler_free(hdl); 358 v4l2_device_unregister(v4l2_dev); 359 release_region(fmi->io, 2); 360 if (pnp_attached) 361 pnp_device_detach(dev); 362 return -EINVAL; 363 } 364 365 v4l2_info(v4l2_dev, "card driver at 0x%x\n", fmi->io); 366 return 0; 367 } 368 369 static void __exit fmi_exit(void) 370 { 371 struct fmi *fmi = &fmi_card; 372 373 v4l2_ctrl_handler_free(&fmi->hdl); 374 video_unregister_device(&fmi->vdev); 375 v4l2_device_unregister(&fmi->v4l2_dev); 376 release_region(fmi->io, 2); 377 if (dev && pnp_attached) 378 pnp_device_detach(dev); 379 } 380 381 module_init(fmi_init); 382 module_exit(fmi_exit); 383