1/* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff 2 * 3 * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood 4 * Converted to new API by Alan Cox <Alan.Cox@linux.org> 5 * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org> 6 * 7 * TODO: Allow for more than one of these foolish entities :-) 8 * 9 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org> 10 */ 11 12#include <linux/module.h> /* Modules */ 13#include <linux/init.h> /* Initdata */ 14#include <linux/ioport.h> /* request_region */ 15#include <linux/delay.h> /* udelay */ 16#include <asm/io.h> /* outb, outb_p */ 17#include <asm/uaccess.h> /* copy to/from user */ 18#include <linux/videodev2.h> /* kernel radio structs */ 19#include <media/v4l2-common.h> 20#include <linux/spinlock.h> 21 22#include <linux/version.h> /* for KERNEL_VERSION MACRO */ 23#define RADIO_VERSION KERNEL_VERSION(0,0,2) 24 25static struct v4l2_queryctrl radio_qctrl[] = { 26 { 27 .id = V4L2_CID_AUDIO_MUTE, 28 .name = "Mute", 29 .minimum = 0, 30 .maximum = 1, 31 .default_value = 1, 32 .type = V4L2_CTRL_TYPE_BOOLEAN, 33 },{ 34 .id = V4L2_CID_AUDIO_VOLUME, 35 .name = "Volume", 36 .minimum = 0, 37 .maximum = 65535, 38 .step = 65535, 39 .default_value = 0xff, 40 .type = V4L2_CTRL_TYPE_INTEGER, 41 } 42}; 43 44#ifndef CONFIG_RADIO_RTRACK2_PORT 45#define CONFIG_RADIO_RTRACK2_PORT -1 46#endif 47 48static int io = CONFIG_RADIO_RTRACK2_PORT; 49static int radio_nr = -1; 50static spinlock_t lock; 51 52struct rt_device 53{ 54 int port; 55 unsigned long curfreq; 56 int muted; 57}; 58 59 60/* local things */ 61 62static void rt_mute(struct rt_device *dev) 63{ 64 if(dev->muted) 65 return; 66 spin_lock(&lock); 67 outb(1, io); 68 spin_unlock(&lock); 69 dev->muted = 1; 70} 71 72static void rt_unmute(struct rt_device *dev) 73{ 74 if(dev->muted == 0) 75 return; 76 spin_lock(&lock); 77 outb(0, io); 78 spin_unlock(&lock); 79 dev->muted = 0; 80} 81 82static void zero(void) 83{ 84 outb_p(1, io); 85 outb_p(3, io); 86 outb_p(1, io); 87} 88 89static void one(void) 90{ 91 outb_p(5, io); 92 outb_p(7, io); 93 outb_p(5, io); 94} 95 96static int rt_setfreq(struct rt_device *dev, unsigned long freq) 97{ 98 int i; 99 100 freq = freq / 200 + 856; 101 102 spin_lock(&lock); 103 104 outb_p(0xc8, io); 105 outb_p(0xc9, io); 106 outb_p(0xc9, io); 107 108 for (i = 0; i < 10; i++) 109 zero (); 110 111 for (i = 14; i >= 0; i--) 112 if (freq & (1 << i)) 113 one (); 114 else 115 zero (); 116 117 outb_p(0xc8, io); 118 if (!dev->muted) 119 outb_p(0, io); 120 121 spin_unlock(&lock); 122 return 0; 123} 124 125static int vidioc_querycap(struct file *file, void *priv, 126 struct v4l2_capability *v) 127{ 128 strlcpy(v->driver, "radio-rtrack2", sizeof(v->driver)); 129 strlcpy(v->card, "RadioTrack II", sizeof(v->card)); 130 sprintf(v->bus_info, "ISA"); 131 v->version = RADIO_VERSION; 132 v->capabilities = V4L2_CAP_TUNER; 133 return 0; 134} 135 136static int vidioc_s_tuner(struct file *file, void *priv, 137 struct v4l2_tuner *v) 138{ 139 if (v->index > 0) 140 return -EINVAL; 141 142 return 0; 143} 144 145static int rt_getsigstr(struct rt_device *dev) 146{ 147 if (inb(io) & 2) /* bit set = no signal present */ 148 return 0; 149 return 1; /* signal present */ 150} 151 152static int vidioc_g_tuner(struct file *file, void *priv, 153 struct v4l2_tuner *v) 154{ 155 struct video_device *dev = video_devdata(file); 156 struct rt_device *rt = dev->priv; 157 158 if (v->index > 0) 159 return -EINVAL; 160 161 strcpy(v->name, "FM"); 162 v->type = V4L2_TUNER_RADIO; 163 v->rangelow = (88*16000); 164 v->rangehigh = (108*16000); 165 v->rxsubchans = V4L2_TUNER_SUB_MONO; 166 v->capability = V4L2_TUNER_CAP_LOW; 167 v->audmode = V4L2_TUNER_MODE_MONO; 168 v->signal = 0xFFFF*rt_getsigstr(rt); 169 return 0; 170} 171 172static int vidioc_s_frequency(struct file *file, void *priv, 173 struct v4l2_frequency *f) 174{ 175 struct video_device *dev = video_devdata(file); 176 struct rt_device *rt = dev->priv; 177 178 rt->curfreq = f->frequency; 179 rt_setfreq(rt, rt->curfreq); 180 return 0; 181} 182 183static int vidioc_g_frequency(struct file *file, void *priv, 184 struct v4l2_frequency *f) 185{ 186 struct video_device *dev = video_devdata(file); 187 struct rt_device *rt = dev->priv; 188 189 f->type = V4L2_TUNER_RADIO; 190 f->frequency = rt->curfreq; 191 return 0; 192} 193 194static int vidioc_queryctrl(struct file *file, void *priv, 195 struct v4l2_queryctrl *qc) 196{ 197 int i; 198 199 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { 200 if (qc->id && qc->id == radio_qctrl[i].id) { 201 memcpy(qc, &(radio_qctrl[i]), 202 sizeof(*qc)); 203 return 0; 204 } 205 } 206 return -EINVAL; 207} 208 209static int vidioc_g_ctrl(struct file *file, void *priv, 210 struct v4l2_control *ctrl) 211{ 212 struct video_device *dev = video_devdata(file); 213 struct rt_device *rt = dev->priv; 214 215 switch (ctrl->id) { 216 case V4L2_CID_AUDIO_MUTE: 217 ctrl->value = rt->muted; 218 return 0; 219 case V4L2_CID_AUDIO_VOLUME: 220 if (rt->muted) 221 ctrl->value = 0; 222 else 223 ctrl->value = 65535; 224 return 0; 225 } 226 return -EINVAL; 227} 228 229static int vidioc_s_ctrl(struct file *file, void *priv, 230 struct v4l2_control *ctrl) 231{ 232 struct video_device *dev = video_devdata(file); 233 struct rt_device *rt = dev->priv; 234 235 switch (ctrl->id) { 236 case V4L2_CID_AUDIO_MUTE: 237 if (ctrl->value) 238 rt_mute(rt); 239 else 240 rt_unmute(rt); 241 return 0; 242 case V4L2_CID_AUDIO_VOLUME: 243 if (ctrl->value) 244 rt_unmute(rt); 245 else 246 rt_mute(rt); 247 return 0; 248 } 249 return -EINVAL; 250} 251 252static int vidioc_g_audio(struct file *file, void *priv, 253 struct v4l2_audio *a) 254{ 255 if (a->index > 1) 256 return -EINVAL; 257 258 strcpy(a->name, "Radio"); 259 a->capability = V4L2_AUDCAP_STEREO; 260 return 0; 261} 262 263static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) 264{ 265 *i = 0; 266 return 0; 267} 268 269static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) 270{ 271 if (i != 0) 272 return -EINVAL; 273 return 0; 274} 275 276static int vidioc_s_audio(struct file *file, void *priv, 277 struct v4l2_audio *a) 278{ 279 if (a->index != 0) 280 return -EINVAL; 281 return 0; 282} 283 284static struct rt_device rtrack2_unit; 285 286static const struct file_operations rtrack2_fops = { 287 .owner = THIS_MODULE, 288 .open = video_exclusive_open, 289 .release = video_exclusive_release, 290 .ioctl = video_ioctl2, 291 .compat_ioctl = v4l_compat_ioctl32, 292 .llseek = no_llseek, 293}; 294 295static struct video_device rtrack2_radio= 296{ 297 .owner = THIS_MODULE, 298 .name = "RadioTrack II radio", 299 .type = VID_TYPE_TUNER, 300 .hardware = 0, 301 .fops = &rtrack2_fops, 302 .vidioc_querycap = vidioc_querycap, 303 .vidioc_g_tuner = vidioc_g_tuner, 304 .vidioc_s_tuner = vidioc_s_tuner, 305 .vidioc_g_frequency = vidioc_g_frequency, 306 .vidioc_s_frequency = vidioc_s_frequency, 307 .vidioc_queryctrl = vidioc_queryctrl, 308 .vidioc_g_ctrl = vidioc_g_ctrl, 309 .vidioc_s_ctrl = vidioc_s_ctrl, 310 .vidioc_g_audio = vidioc_g_audio, 311 .vidioc_s_audio = vidioc_s_audio, 312 .vidioc_g_input = vidioc_g_input, 313 .vidioc_s_input = vidioc_s_input, 314}; 315 316static int __init rtrack2_init(void) 317{ 318 if(io==-1) 319 { 320 printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n"); 321 return -EINVAL; 322 } 323 if (!request_region(io, 4, "rtrack2")) 324 { 325 printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io); 326 return -EBUSY; 327 } 328 329 rtrack2_radio.priv=&rtrack2_unit; 330 331 spin_lock_init(&lock); 332 if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr)==-1) 333 { 334 release_region(io, 4); 335 return -EINVAL; 336 } 337 338 printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n"); 339 340 /* mute card - prevents noisy bootups */ 341 outb(1, io); 342 rtrack2_unit.muted = 1; 343 344 return 0; 345} 346 347MODULE_AUTHOR("Ben Pfaff"); 348MODULE_DESCRIPTION("A driver for the RadioTrack II radio card."); 349MODULE_LICENSE("GPL"); 350 351module_param(io, int, 0); 352MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)"); 353module_param(radio_nr, int, 0); 354 355static void __exit rtrack2_cleanup_module(void) 356{ 357 video_unregister_device(&rtrack2_radio); 358 release_region(io,4); 359} 360 361module_init(rtrack2_init); 362module_exit(rtrack2_cleanup_module); 363 364/* 365 Local variables: 366 compile-command: "mmake" 367 End: 368*/ 369