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 "lm7000.h" 32 33 MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood"); 34 MODULE_DESCRIPTION("A driver for the SF16-FMI, SF16-FMP and SF16-FMD radio."); 35 MODULE_LICENSE("GPL"); 36 MODULE_VERSION("0.0.3"); 37 38 static int io = -1; 39 static int radio_nr = -1; 40 41 module_param(io, int, 0); 42 MODULE_PARM_DESC(io, "I/O address of the SF16-FMI/SF16-FMP/SF16-FMD card (0x284 or 0x384)"); 43 module_param(radio_nr, int, 0); 44 45 struct fmi 46 { 47 struct v4l2_device v4l2_dev; 48 struct v4l2_ctrl_handler hdl; 49 struct video_device vdev; 50 int io; 51 bool mute; 52 unsigned long curfreq; /* freq in kHz */ 53 struct mutex lock; 54 }; 55 56 static struct fmi fmi_card; 57 static struct pnp_dev *dev; 58 bool pnp_attached; 59 60 #define RSF16_MINFREQ (87U * 16000) 61 #define RSF16_MAXFREQ (108U * 16000) 62 63 #define FMI_BIT_TUN_CE (1 << 0) 64 #define FMI_BIT_TUN_CLK (1 << 1) 65 #define FMI_BIT_TUN_DATA (1 << 2) 66 #define FMI_BIT_VOL_SW (1 << 3) 67 #define FMI_BIT_TUN_STRQ (1 << 4) 68 69 static void fmi_set_pins(void *handle, u8 pins) 70 { 71 struct fmi *fmi = handle; 72 u8 bits = FMI_BIT_TUN_STRQ; 73 74 if (!fmi->mute) 75 bits |= FMI_BIT_VOL_SW; 76 77 if (pins & LM7000_DATA) 78 bits |= FMI_BIT_TUN_DATA; 79 if (pins & LM7000_CLK) 80 bits |= FMI_BIT_TUN_CLK; 81 if (pins & LM7000_CE) 82 bits |= FMI_BIT_TUN_CE; 83 84 mutex_lock(&fmi->lock); 85 outb_p(bits, fmi->io); 86 mutex_unlock(&fmi->lock); 87 } 88 89 static inline void fmi_mute(struct fmi *fmi) 90 { 91 mutex_lock(&fmi->lock); 92 outb(0x00, fmi->io); 93 mutex_unlock(&fmi->lock); 94 } 95 96 static inline void fmi_unmute(struct fmi *fmi) 97 { 98 mutex_lock(&fmi->lock); 99 outb(0x08, fmi->io); 100 mutex_unlock(&fmi->lock); 101 } 102 103 static inline int fmi_getsigstr(struct fmi *fmi) 104 { 105 int val; 106 int res; 107 108 mutex_lock(&fmi->lock); 109 val = fmi->mute ? 0x00 : 0x08; /* mute/unmute */ 110 outb(val, fmi->io); 111 outb(val | 0x10, fmi->io); 112 msleep(143); /* was schedule_timeout(HZ/7) */ 113 res = (int)inb(fmi->io + 1); 114 outb(val, fmi->io); 115 116 mutex_unlock(&fmi->lock); 117 return (res & 2) ? 0 : 0xFFFF; 118 } 119 120 static int vidioc_querycap(struct file *file, void *priv, 121 struct v4l2_capability *v) 122 { 123 strlcpy(v->driver, "radio-sf16fmi", sizeof(v->driver)); 124 strlcpy(v->card, "SF16-FMI/FMP/FMD radio", sizeof(v->card)); 125 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info)); 126 v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO; 127 v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS; 128 return 0; 129 } 130 131 static int vidioc_g_tuner(struct file *file, void *priv, 132 struct v4l2_tuner *v) 133 { 134 struct fmi *fmi = video_drvdata(file); 135 136 if (v->index > 0) 137 return -EINVAL; 138 139 strlcpy(v->name, "FM", sizeof(v->name)); 140 v->type = V4L2_TUNER_RADIO; 141 v->rangelow = RSF16_MINFREQ; 142 v->rangehigh = RSF16_MAXFREQ; 143 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; 144 v->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW; 145 v->audmode = V4L2_TUNER_MODE_STEREO; 146 v->signal = fmi_getsigstr(fmi); 147 return 0; 148 } 149 150 static int vidioc_s_tuner(struct file *file, void *priv, 151 const struct v4l2_tuner *v) 152 { 153 return v->index ? -EINVAL : 0; 154 } 155 156 static int vidioc_s_frequency(struct file *file, void *priv, 157 const struct v4l2_frequency *f) 158 { 159 struct fmi *fmi = video_drvdata(file); 160 unsigned freq = f->frequency; 161 162 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) 163 return -EINVAL; 164 clamp(freq, RSF16_MINFREQ, RSF16_MAXFREQ); 165 /* rounding in steps of 800 to match the freq 166 that will be used */ 167 lm7000_set_freq((freq / 800) * 800, fmi, fmi_set_pins); 168 return 0; 169 } 170 171 static int vidioc_g_frequency(struct file *file, void *priv, 172 struct v4l2_frequency *f) 173 { 174 struct fmi *fmi = video_drvdata(file); 175 176 if (f->tuner != 0) 177 return -EINVAL; 178 f->type = V4L2_TUNER_RADIO; 179 f->frequency = fmi->curfreq; 180 return 0; 181 } 182 183 static int fmi_s_ctrl(struct v4l2_ctrl *ctrl) 184 { 185 struct fmi *fmi = container_of(ctrl->handler, struct fmi, hdl); 186 187 switch (ctrl->id) { 188 case V4L2_CID_AUDIO_MUTE: 189 if (ctrl->val) 190 fmi_mute(fmi); 191 else 192 fmi_unmute(fmi); 193 fmi->mute = ctrl->val; 194 return 0; 195 } 196 return -EINVAL; 197 } 198 199 static const struct v4l2_ctrl_ops fmi_ctrl_ops = { 200 .s_ctrl = fmi_s_ctrl, 201 }; 202 203 static const struct v4l2_file_operations fmi_fops = { 204 .owner = THIS_MODULE, 205 .unlocked_ioctl = video_ioctl2, 206 }; 207 208 static const struct v4l2_ioctl_ops fmi_ioctl_ops = { 209 .vidioc_querycap = vidioc_querycap, 210 .vidioc_g_tuner = vidioc_g_tuner, 211 .vidioc_s_tuner = vidioc_s_tuner, 212 .vidioc_g_frequency = vidioc_g_frequency, 213 .vidioc_s_frequency = vidioc_s_frequency, 214 }; 215 216 /* ladis: this is my card. does any other types exist? */ 217 static struct isapnp_device_id id_table[] = { 218 /* SF16-FMI */ 219 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, 220 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0}, 221 /* SF16-FMD */ 222 { ISAPNP_ANY_ID, ISAPNP_ANY_ID, 223 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad12), 0}, 224 { ISAPNP_CARD_END, }, 225 }; 226 227 MODULE_DEVICE_TABLE(isapnp, id_table); 228 229 static int __init isapnp_fmi_probe(void) 230 { 231 int i = 0; 232 233 while (id_table[i].card_vendor != 0 && dev == NULL) { 234 dev = pnp_find_dev(NULL, id_table[i].vendor, 235 id_table[i].function, NULL); 236 i++; 237 } 238 239 if (!dev) 240 return -ENODEV; 241 if (pnp_device_attach(dev) < 0) 242 return -EAGAIN; 243 if (pnp_activate_dev(dev) < 0) { 244 printk(KERN_ERR "radio-sf16fmi: PnP configure failed (out of resources?)\n"); 245 pnp_device_detach(dev); 246 return -ENOMEM; 247 } 248 if (!pnp_port_valid(dev, 0)) { 249 pnp_device_detach(dev); 250 return -ENODEV; 251 } 252 253 i = pnp_port_start(dev, 0); 254 printk(KERN_INFO "radio-sf16fmi: PnP reports card at %#x\n", i); 255 256 return i; 257 } 258 259 static int __init fmi_init(void) 260 { 261 struct fmi *fmi = &fmi_card; 262 struct v4l2_device *v4l2_dev = &fmi->v4l2_dev; 263 struct v4l2_ctrl_handler *hdl = &fmi->hdl; 264 int res, i; 265 int probe_ports[] = { 0, 0x284, 0x384 }; 266 267 if (io < 0) { 268 for (i = 0; i < ARRAY_SIZE(probe_ports); i++) { 269 io = probe_ports[i]; 270 if (io == 0) { 271 io = isapnp_fmi_probe(); 272 if (io < 0) 273 continue; 274 pnp_attached = 1; 275 } 276 if (!request_region(io, 2, "radio-sf16fmi")) { 277 if (pnp_attached) 278 pnp_device_detach(dev); 279 io = -1; 280 continue; 281 } 282 if (pnp_attached || 283 ((inb(io) & 0xf9) == 0xf9 && (inb(io) & 0x4) == 0)) 284 break; 285 release_region(io, 2); 286 io = -1; 287 } 288 } else { 289 if (!request_region(io, 2, "radio-sf16fmi")) { 290 printk(KERN_ERR "radio-sf16fmi: port %#x already in use\n", io); 291 return -EBUSY; 292 } 293 if (inb(io) == 0xff) { 294 printk(KERN_ERR "radio-sf16fmi: card not present at %#x\n", io); 295 release_region(io, 2); 296 return -ENODEV; 297 } 298 } 299 if (io < 0) { 300 printk(KERN_ERR "radio-sf16fmi: no cards found\n"); 301 return -ENODEV; 302 } 303 304 strlcpy(v4l2_dev->name, "sf16fmi", sizeof(v4l2_dev->name)); 305 fmi->io = io; 306 307 res = v4l2_device_register(NULL, v4l2_dev); 308 if (res < 0) { 309 release_region(fmi->io, 2); 310 if (pnp_attached) 311 pnp_device_detach(dev); 312 v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); 313 return res; 314 } 315 316 v4l2_ctrl_handler_init(hdl, 1); 317 v4l2_ctrl_new_std(hdl, &fmi_ctrl_ops, 318 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); 319 v4l2_dev->ctrl_handler = hdl; 320 if (hdl->error) { 321 res = hdl->error; 322 v4l2_err(v4l2_dev, "Could not register controls\n"); 323 v4l2_ctrl_handler_free(hdl); 324 v4l2_device_unregister(v4l2_dev); 325 return res; 326 } 327 328 strlcpy(fmi->vdev.name, v4l2_dev->name, sizeof(fmi->vdev.name)); 329 fmi->vdev.v4l2_dev = v4l2_dev; 330 fmi->vdev.fops = &fmi_fops; 331 fmi->vdev.ioctl_ops = &fmi_ioctl_ops; 332 fmi->vdev.release = video_device_release_empty; 333 video_set_drvdata(&fmi->vdev, fmi); 334 335 mutex_init(&fmi->lock); 336 337 /* mute card - prevents noisy bootups */ 338 fmi_mute(fmi); 339 340 if (video_register_device(&fmi->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { 341 v4l2_ctrl_handler_free(hdl); 342 v4l2_device_unregister(v4l2_dev); 343 release_region(fmi->io, 2); 344 if (pnp_attached) 345 pnp_device_detach(dev); 346 return -EINVAL; 347 } 348 349 v4l2_info(v4l2_dev, "card driver at 0x%x\n", fmi->io); 350 return 0; 351 } 352 353 static void __exit fmi_exit(void) 354 { 355 struct fmi *fmi = &fmi_card; 356 357 v4l2_ctrl_handler_free(&fmi->hdl); 358 video_unregister_device(&fmi->vdev); 359 v4l2_device_unregister(&fmi->v4l2_dev); 360 release_region(fmi->io, 2); 361 if (dev && pnp_attached) 362 pnp_device_detach(dev); 363 } 364 365 module_init(fmi_init); 366 module_exit(fmi_exit); 367