Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* Typhoon Radio Card driver for radio support |
| 2 | * (c) 1999 Dr. Henrik Seidel <Henrik.Seidel@gmx.de> |
| 3 | * |
| 4 | * Card manufacturer: |
| 5 | * http://194.18.155.92/idc/prod2.idc?nr=50753&lang=e |
| 6 | * |
| 7 | * Notes on the hardware |
| 8 | * |
| 9 | * This card has two output sockets, one for speakers and one for line. |
| 10 | * The speaker output has volume control, but only in four discrete |
| 11 | * steps. The line output has neither volume control nor mute. |
| 12 | * |
| 13 | * The card has auto-stereo according to its manual, although it all |
| 14 | * sounds mono to me (even with the Win/DOS drivers). Maybe it's my |
| 15 | * antenna - I really don't know for sure. |
| 16 | * |
| 17 | * Frequency control is done digitally. |
| 18 | * |
| 19 | * Volume control is done digitally, but there are only four different |
| 20 | * possible values. So you should better always turn the volume up and |
| 21 | * use line control. I got the best results by connecting line output |
| 22 | * to the sound card microphone input. For such a configuration the |
| 23 | * volume control has no effect, since volume control only influences |
| 24 | * the speaker output. |
| 25 | * |
| 26 | * There is no explicit mute/unmute. So I set the radio frequency to a |
| 27 | * value where I do expect just noise and turn the speaker volume down. |
| 28 | * The frequency change is necessary since the card never seems to be |
| 29 | * completely silent. |
Mauro Carvalho Chehab | 30c4830 | 2006-08-08 09:10:04 -0300 | [diff] [blame] | 30 | * |
| 31 | * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | */ |
| 33 | |
| 34 | #include <linux/module.h> /* Modules */ |
| 35 | #include <linux/init.h> /* Initdata */ |
Peter Osterlund | fb911ee | 2005-09-13 01:25:15 -0700 | [diff] [blame] | 36 | #include <linux/ioport.h> /* request_region */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <linux/proc_fs.h> /* radio card status report */ |
Alexey Dobriyan | 0b9c2b7 | 2008-04-10 21:34:39 -0300 | [diff] [blame] | 38 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <asm/io.h> /* outb, outb_p */ |
| 40 | #include <asm/uaccess.h> /* copy to/from user */ |
Mauro Carvalho Chehab | 30c4830 | 2006-08-08 09:10:04 -0300 | [diff] [blame] | 41 | #include <linux/videodev2.h> /* kernel radio structs */ |
Mauro Carvalho Chehab | 5e87efa | 2006-06-05 10:26:32 -0300 | [diff] [blame] | 42 | #include <media/v4l2-common.h> |
Hans Verkuil | 35ea11f | 2008-07-20 08:12:02 -0300 | [diff] [blame] | 43 | #include <media/v4l2-ioctl.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
Mauro Carvalho Chehab | 30c4830 | 2006-08-08 09:10:04 -0300 | [diff] [blame] | 45 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ |
| 46 | #define RADIO_VERSION KERNEL_VERSION(0,1,1) |
| 47 | #define BANNER "Typhoon Radio Card driver v0.1.1\n" |
| 48 | |
| 49 | static struct v4l2_queryctrl radio_qctrl[] = { |
| 50 | { |
| 51 | .id = V4L2_CID_AUDIO_MUTE, |
| 52 | .name = "Mute", |
| 53 | .minimum = 0, |
| 54 | .maximum = 1, |
| 55 | .default_value = 1, |
| 56 | .type = V4L2_CTRL_TYPE_BOOLEAN, |
| 57 | },{ |
| 58 | .id = V4L2_CID_AUDIO_VOLUME, |
| 59 | .name = "Volume", |
| 60 | .minimum = 0, |
| 61 | .maximum = 65535, |
| 62 | .step = 1<<14, |
| 63 | .default_value = 0xff, |
| 64 | .type = V4L2_CTRL_TYPE_INTEGER, |
| 65 | } |
| 66 | }; |
| 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
| 69 | #ifndef CONFIG_RADIO_TYPHOON_PORT |
| 70 | #define CONFIG_RADIO_TYPHOON_PORT -1 |
| 71 | #endif |
| 72 | |
| 73 | #ifndef CONFIG_RADIO_TYPHOON_MUTEFREQ |
| 74 | #define CONFIG_RADIO_TYPHOON_MUTEFREQ 0 |
| 75 | #endif |
| 76 | |
| 77 | #ifndef CONFIG_PROC_FS |
| 78 | #undef CONFIG_RADIO_TYPHOON_PROC_FS |
| 79 | #endif |
| 80 | |
| 81 | struct typhoon_device { |
Hans Verkuil | 3ca685a | 2008-08-23 04:49:13 -0300 | [diff] [blame] | 82 | unsigned long in_use; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | int iobase; |
| 84 | int curvol; |
| 85 | int muted; |
| 86 | unsigned long curfreq; |
| 87 | unsigned long mutefreq; |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 88 | struct mutex lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | }; |
| 90 | |
| 91 | static void typhoon_setvol_generic(struct typhoon_device *dev, int vol); |
| 92 | static int typhoon_setfreq_generic(struct typhoon_device *dev, |
| 93 | unsigned long frequency); |
| 94 | static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency); |
| 95 | static void typhoon_mute(struct typhoon_device *dev); |
| 96 | static void typhoon_unmute(struct typhoon_device *dev); |
| 97 | static int typhoon_setvol(struct typhoon_device *dev, int vol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
| 99 | static void typhoon_setvol_generic(struct typhoon_device *dev, int vol) |
| 100 | { |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 101 | mutex_lock(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | vol >>= 14; /* Map 16 bit to 2 bit */ |
| 103 | vol &= 3; |
| 104 | outb_p(vol / 2, dev->iobase); /* Set the volume, high bit. */ |
| 105 | outb_p(vol % 2, dev->iobase + 2); /* Set the volume, low bit. */ |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 106 | mutex_unlock(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | } |
| 108 | |
| 109 | static int typhoon_setfreq_generic(struct typhoon_device *dev, |
| 110 | unsigned long frequency) |
| 111 | { |
| 112 | unsigned long outval; |
| 113 | unsigned long x; |
| 114 | |
| 115 | /* |
| 116 | * The frequency transfer curve is not linear. The best fit I could |
| 117 | * get is |
| 118 | * |
| 119 | * outval = -155 + exp((f + 15.55) * 0.057)) |
| 120 | * |
| 121 | * where frequency f is in MHz. Since we don't have exp in the kernel, |
| 122 | * I approximate this function by a third order polynomial. |
| 123 | * |
| 124 | */ |
| 125 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 126 | mutex_lock(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | x = frequency / 160; |
| 128 | outval = (x * x + 2500) / 5000; |
| 129 | outval = (outval * x + 5000) / 10000; |
| 130 | outval -= (10 * x * x + 10433) / 20866; |
| 131 | outval += 4 * x - 11505; |
| 132 | |
| 133 | outb_p((outval >> 8) & 0x01, dev->iobase + 4); |
| 134 | outb_p(outval >> 9, dev->iobase + 6); |
| 135 | outb_p(outval & 0xff, dev->iobase + 8); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 136 | mutex_unlock(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
| 138 | return 0; |
| 139 | } |
| 140 | |
| 141 | static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency) |
| 142 | { |
| 143 | typhoon_setfreq_generic(dev, frequency); |
| 144 | dev->curfreq = frequency; |
| 145 | return 0; |
| 146 | } |
| 147 | |
| 148 | static void typhoon_mute(struct typhoon_device *dev) |
| 149 | { |
| 150 | if (dev->muted == 1) |
| 151 | return; |
| 152 | typhoon_setvol_generic(dev, 0); |
| 153 | typhoon_setfreq_generic(dev, dev->mutefreq); |
| 154 | dev->muted = 1; |
| 155 | } |
| 156 | |
| 157 | static void typhoon_unmute(struct typhoon_device *dev) |
| 158 | { |
| 159 | if (dev->muted == 0) |
| 160 | return; |
| 161 | typhoon_setfreq_generic(dev, dev->curfreq); |
| 162 | typhoon_setvol_generic(dev, dev->curvol); |
| 163 | dev->muted = 0; |
| 164 | } |
| 165 | |
| 166 | static int typhoon_setvol(struct typhoon_device *dev, int vol) |
| 167 | { |
| 168 | if (dev->muted && vol != 0) { /* user is unmuting the card */ |
| 169 | dev->curvol = vol; |
| 170 | typhoon_unmute(dev); |
| 171 | return 0; |
| 172 | } |
| 173 | if (vol == dev->curvol) /* requested volume == current */ |
| 174 | return 0; |
| 175 | |
| 176 | if (vol == 0) { /* volume == 0 means mute the card */ |
| 177 | typhoon_mute(dev); |
| 178 | dev->curvol = vol; |
| 179 | return 0; |
| 180 | } |
| 181 | typhoon_setvol_generic(dev, vol); |
| 182 | dev->curvol = vol; |
| 183 | return 0; |
| 184 | } |
| 185 | |
Douglas Landgraf | 3f6892a | 2007-04-24 08:40:06 -0300 | [diff] [blame] | 186 | static int vidioc_querycap(struct file *file, void *priv, |
| 187 | struct v4l2_capability *v) |
| 188 | { |
| 189 | strlcpy(v->driver, "radio-typhoon", sizeof(v->driver)); |
| 190 | strlcpy(v->card, "Typhoon Radio", sizeof(v->card)); |
| 191 | sprintf(v->bus_info, "ISA"); |
| 192 | v->version = RADIO_VERSION; |
| 193 | v->capabilities = V4L2_CAP_TUNER; |
| 194 | return 0; |
| 195 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
Douglas Landgraf | 3f6892a | 2007-04-24 08:40:06 -0300 | [diff] [blame] | 197 | static int vidioc_g_tuner(struct file *file, void *priv, |
| 198 | struct v4l2_tuner *v) |
| 199 | { |
| 200 | if (v->index > 0) |
| 201 | return -EINVAL; |
| 202 | |
| 203 | strcpy(v->name, "FM"); |
| 204 | v->type = V4L2_TUNER_RADIO; |
| 205 | v->rangelow = (87.5*16000); |
| 206 | v->rangehigh = (108*16000); |
| 207 | v->rxsubchans = V4L2_TUNER_SUB_MONO; |
| 208 | v->capability = V4L2_TUNER_CAP_LOW; |
| 209 | v->audmode = V4L2_TUNER_MODE_MONO; |
| 210 | v->signal = 0xFFFF; /* We can't get the signal strength */ |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | static int vidioc_s_tuner(struct file *file, void *priv, |
| 215 | struct v4l2_tuner *v) |
| 216 | { |
| 217 | if (v->index > 0) |
| 218 | return -EINVAL; |
| 219 | |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | static int vidioc_s_frequency(struct file *file, void *priv, |
| 224 | struct v4l2_frequency *f) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | { |
Hans Verkuil | c170ecf | 2008-08-23 08:32:09 -0300 | [diff] [blame] | 226 | struct typhoon_device *typhoon = video_drvdata(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | |
Douglas Landgraf | 3f6892a | 2007-04-24 08:40:06 -0300 | [diff] [blame] | 228 | typhoon->curfreq = f->frequency; |
| 229 | typhoon_setfreq(typhoon, typhoon->curfreq); |
| 230 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | } |
| 232 | |
Douglas Landgraf | 3f6892a | 2007-04-24 08:40:06 -0300 | [diff] [blame] | 233 | static int vidioc_g_frequency(struct file *file, void *priv, |
| 234 | struct v4l2_frequency *f) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | { |
Hans Verkuil | c170ecf | 2008-08-23 08:32:09 -0300 | [diff] [blame] | 236 | struct typhoon_device *typhoon = video_drvdata(file); |
Douglas Landgraf | 3f6892a | 2007-04-24 08:40:06 -0300 | [diff] [blame] | 237 | |
| 238 | f->type = V4L2_TUNER_RADIO; |
| 239 | f->frequency = typhoon->curfreq; |
| 240 | |
| 241 | return 0; |
| 242 | } |
| 243 | |
| 244 | static int vidioc_queryctrl(struct file *file, void *priv, |
| 245 | struct v4l2_queryctrl *qc) |
| 246 | { |
| 247 | int i; |
| 248 | |
| 249 | for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { |
| 250 | if (qc->id && qc->id == radio_qctrl[i].id) { |
| 251 | memcpy(qc, &(radio_qctrl[i]), |
| 252 | sizeof(*qc)); |
| 253 | return 0; |
| 254 | } |
| 255 | } |
| 256 | return -EINVAL; |
| 257 | } |
| 258 | |
| 259 | static int vidioc_g_ctrl(struct file *file, void *priv, |
| 260 | struct v4l2_control *ctrl) |
| 261 | { |
Hans Verkuil | c170ecf | 2008-08-23 08:32:09 -0300 | [diff] [blame] | 262 | struct typhoon_device *typhoon = video_drvdata(file); |
Douglas Landgraf | 3f6892a | 2007-04-24 08:40:06 -0300 | [diff] [blame] | 263 | |
| 264 | switch (ctrl->id) { |
| 265 | case V4L2_CID_AUDIO_MUTE: |
| 266 | ctrl->value = typhoon->muted; |
| 267 | return 0; |
| 268 | case V4L2_CID_AUDIO_VOLUME: |
| 269 | ctrl->value = typhoon->curvol; |
| 270 | return 0; |
| 271 | } |
| 272 | return -EINVAL; |
| 273 | } |
| 274 | |
| 275 | static int vidioc_s_ctrl (struct file *file, void *priv, |
| 276 | struct v4l2_control *ctrl) |
| 277 | { |
Hans Verkuil | c170ecf | 2008-08-23 08:32:09 -0300 | [diff] [blame] | 278 | struct typhoon_device *typhoon = video_drvdata(file); |
Douglas Landgraf | 3f6892a | 2007-04-24 08:40:06 -0300 | [diff] [blame] | 279 | |
| 280 | switch (ctrl->id) { |
| 281 | case V4L2_CID_AUDIO_MUTE: |
| 282 | if (ctrl->value) |
| 283 | typhoon_mute(typhoon); |
| 284 | else |
| 285 | typhoon_unmute(typhoon); |
| 286 | return 0; |
| 287 | case V4L2_CID_AUDIO_VOLUME: |
| 288 | typhoon_setvol(typhoon, ctrl->value); |
| 289 | return 0; |
| 290 | } |
| 291 | return -EINVAL; |
| 292 | } |
| 293 | |
| 294 | static int vidioc_g_audio(struct file *file, void *priv, |
| 295 | struct v4l2_audio *a) |
| 296 | { |
| 297 | if (a->index > 1) |
| 298 | return -EINVAL; |
| 299 | |
| 300 | strcpy(a->name, "Radio"); |
| 301 | a->capability = V4L2_AUDCAP_STEREO; |
| 302 | return 0; |
| 303 | } |
| 304 | |
| 305 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) |
| 306 | { |
| 307 | *i = 0; |
| 308 | return 0; |
| 309 | } |
| 310 | |
| 311 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) |
| 312 | { |
| 313 | if (i != 0) |
| 314 | return -EINVAL; |
| 315 | return 0; |
| 316 | } |
| 317 | |
| 318 | static int vidioc_s_audio(struct file *file, void *priv, |
| 319 | struct v4l2_audio *a) |
| 320 | { |
| 321 | if (a->index != 0) |
| 322 | return -EINVAL; |
| 323 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | } |
| 325 | |
| 326 | static struct typhoon_device typhoon_unit = |
| 327 | { |
| 328 | .iobase = CONFIG_RADIO_TYPHOON_PORT, |
| 329 | .curfreq = CONFIG_RADIO_TYPHOON_MUTEFREQ, |
| 330 | .mutefreq = CONFIG_RADIO_TYPHOON_MUTEFREQ, |
| 331 | }; |
| 332 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame^] | 333 | static int typhoon_exclusive_open(struct file *file) |
Hans Verkuil | 3ca685a | 2008-08-23 04:49:13 -0300 | [diff] [blame] | 334 | { |
| 335 | return test_and_set_bit(0, &typhoon_unit.in_use) ? -EBUSY : 0; |
| 336 | } |
| 337 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame^] | 338 | static int typhoon_exclusive_release(struct file *file) |
Hans Verkuil | 3ca685a | 2008-08-23 04:49:13 -0300 | [diff] [blame] | 339 | { |
| 340 | clear_bit(0, &typhoon_unit.in_use); |
| 341 | return 0; |
| 342 | } |
| 343 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame^] | 344 | static const struct v4l2_file_operations typhoon_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | .owner = THIS_MODULE, |
Hans Verkuil | 3ca685a | 2008-08-23 04:49:13 -0300 | [diff] [blame] | 346 | .open = typhoon_exclusive_open, |
| 347 | .release = typhoon_exclusive_release, |
Douglas Landgraf | 3f6892a | 2007-04-24 08:40:06 -0300 | [diff] [blame] | 348 | .ioctl = video_ioctl2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | }; |
| 350 | |
Hans Verkuil | a399810 | 2008-07-21 02:57:38 -0300 | [diff] [blame] | 351 | static const struct v4l2_ioctl_ops typhoon_ioctl_ops = { |
Douglas Landgraf | 3f6892a | 2007-04-24 08:40:06 -0300 | [diff] [blame] | 352 | .vidioc_querycap = vidioc_querycap, |
| 353 | .vidioc_g_tuner = vidioc_g_tuner, |
| 354 | .vidioc_s_tuner = vidioc_s_tuner, |
| 355 | .vidioc_g_audio = vidioc_g_audio, |
| 356 | .vidioc_s_audio = vidioc_s_audio, |
| 357 | .vidioc_g_input = vidioc_g_input, |
| 358 | .vidioc_s_input = vidioc_s_input, |
| 359 | .vidioc_g_frequency = vidioc_g_frequency, |
| 360 | .vidioc_s_frequency = vidioc_s_frequency, |
| 361 | .vidioc_queryctrl = vidioc_queryctrl, |
| 362 | .vidioc_g_ctrl = vidioc_g_ctrl, |
| 363 | .vidioc_s_ctrl = vidioc_s_ctrl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | }; |
| 365 | |
Hans Verkuil | a399810 | 2008-07-21 02:57:38 -0300 | [diff] [blame] | 366 | static struct video_device typhoon_radio = { |
Hans Verkuil | a399810 | 2008-07-21 02:57:38 -0300 | [diff] [blame] | 367 | .name = "Typhoon Radio", |
Hans Verkuil | a399810 | 2008-07-21 02:57:38 -0300 | [diff] [blame] | 368 | .fops = &typhoon_fops, |
| 369 | .ioctl_ops = &typhoon_ioctl_ops, |
Hans Verkuil | aa5e90a | 2008-08-23 06:23:55 -0300 | [diff] [blame] | 370 | .release = video_device_release_empty, |
Hans Verkuil | a399810 | 2008-07-21 02:57:38 -0300 | [diff] [blame] | 371 | }; |
| 372 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | #ifdef CONFIG_RADIO_TYPHOON_PROC_FS |
| 374 | |
Alexey Dobriyan | 0b9c2b7 | 2008-04-10 21:34:39 -0300 | [diff] [blame] | 375 | static int typhoon_proc_show(struct seq_file *m, void *v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | #ifdef MODULE |
| 378 | #define MODULEPROCSTRING "Driver loaded as a module" |
| 379 | #else |
| 380 | #define MODULEPROCSTRING "Driver compiled into kernel" |
| 381 | #endif |
| 382 | |
Alexey Dobriyan | 0b9c2b7 | 2008-04-10 21:34:39 -0300 | [diff] [blame] | 383 | seq_puts(m, BANNER); |
| 384 | seq_puts(m, "Load type: " MODULEPROCSTRING "\n\n"); |
| 385 | seq_printf(m, "frequency = %lu kHz\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | typhoon_unit.curfreq >> 4); |
Alexey Dobriyan | 0b9c2b7 | 2008-04-10 21:34:39 -0300 | [diff] [blame] | 387 | seq_printf(m, "volume = %d\n", typhoon_unit.curvol); |
| 388 | seq_printf(m, "mute = %s\n", typhoon_unit.muted ? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | "on" : "off"); |
Alexey Dobriyan | 0b9c2b7 | 2008-04-10 21:34:39 -0300 | [diff] [blame] | 390 | seq_printf(m, "iobase = 0x%x\n", typhoon_unit.iobase); |
| 391 | seq_printf(m, "mute frequency = %lu kHz\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | typhoon_unit.mutefreq >> 4); |
Alexey Dobriyan | 0b9c2b7 | 2008-04-10 21:34:39 -0300 | [diff] [blame] | 393 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | } |
| 395 | |
Alexey Dobriyan | 0b9c2b7 | 2008-04-10 21:34:39 -0300 | [diff] [blame] | 396 | static int typhoon_proc_open(struct inode *inode, struct file *file) |
| 397 | { |
| 398 | return single_open(file, typhoon_proc_show, NULL); |
| 399 | } |
| 400 | |
| 401 | static const struct file_operations typhoon_proc_fops = { |
| 402 | .owner = THIS_MODULE, |
| 403 | .open = typhoon_proc_open, |
| 404 | .read = seq_read, |
| 405 | .llseek = seq_lseek, |
| 406 | .release = single_release, |
| 407 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | #endif /* CONFIG_RADIO_TYPHOON_PROC_FS */ |
| 409 | |
| 410 | MODULE_AUTHOR("Dr. Henrik Seidel"); |
| 411 | MODULE_DESCRIPTION("A driver for the Typhoon radio card (a.k.a. EcoRadio)."); |
| 412 | MODULE_LICENSE("GPL"); |
| 413 | |
| 414 | static int io = -1; |
| 415 | static int radio_nr = -1; |
| 416 | |
| 417 | module_param(io, int, 0); |
| 418 | MODULE_PARM_DESC(io, "I/O address of the Typhoon card (0x316 or 0x336)"); |
| 419 | module_param(radio_nr, int, 0); |
| 420 | |
| 421 | #ifdef MODULE |
Douglas Schilling Landgraf | ff699e6 | 2008-04-22 14:41:48 -0300 | [diff] [blame] | 422 | static unsigned long mutefreq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | module_param(mutefreq, ulong, 0); |
| 424 | MODULE_PARM_DESC(mutefreq, "Frequency used when muting the card (in kHz)"); |
| 425 | #endif |
| 426 | |
| 427 | static int __init typhoon_init(void) |
| 428 | { |
| 429 | #ifdef MODULE |
| 430 | if (io == -1) { |
| 431 | printk(KERN_ERR "radio-typhoon: You must set an I/O address with io=0x316 or io=0x336\n"); |
| 432 | return -EINVAL; |
| 433 | } |
| 434 | typhoon_unit.iobase = io; |
| 435 | |
| 436 | if (mutefreq < 87000 || mutefreq > 108500) { |
| 437 | printk(KERN_ERR "radio-typhoon: You must set a frequency (in kHz) used when muting the card,\n"); |
| 438 | printk(KERN_ERR "radio-typhoon: e.g. with \"mutefreq=87500\" (87000 <= mutefreq <= 108500)\n"); |
| 439 | return -EINVAL; |
| 440 | } |
| 441 | typhoon_unit.mutefreq = mutefreq; |
| 442 | #endif /* MODULE */ |
| 443 | |
| 444 | printk(KERN_INFO BANNER); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 445 | mutex_init(&typhoon_unit.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | io = typhoon_unit.iobase; |
| 447 | if (!request_region(io, 8, "typhoon")) { |
| 448 | printk(KERN_ERR "radio-typhoon: port 0x%x already in use\n", |
| 449 | typhoon_unit.iobase); |
| 450 | return -EBUSY; |
| 451 | } |
| 452 | |
Hans Verkuil | 601e944 | 2008-08-23 07:24:07 -0300 | [diff] [blame] | 453 | video_set_drvdata(&typhoon_radio, &typhoon_unit); |
Hans Verkuil | 3ca685a | 2008-08-23 04:49:13 -0300 | [diff] [blame] | 454 | if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO, radio_nr) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | release_region(io, 8); |
| 456 | return -EINVAL; |
| 457 | } |
| 458 | printk(KERN_INFO "radio-typhoon: port 0x%x.\n", typhoon_unit.iobase); |
| 459 | printk(KERN_INFO "radio-typhoon: mute frequency is %lu kHz.\n", |
| 460 | typhoon_unit.mutefreq); |
| 461 | typhoon_unit.mutefreq <<= 4; |
| 462 | |
| 463 | /* mute card - prevents noisy bootups */ |
| 464 | typhoon_mute(&typhoon_unit); |
| 465 | |
| 466 | #ifdef CONFIG_RADIO_TYPHOON_PROC_FS |
Alexey Dobriyan | 0b9c2b7 | 2008-04-10 21:34:39 -0300 | [diff] [blame] | 467 | if (!proc_create("driver/radio-typhoon", 0, NULL, &typhoon_proc_fops)) |
Trent Piepho | 657de3c | 2006-06-20 00:30:57 -0300 | [diff] [blame] | 468 | printk(KERN_ERR "radio-typhoon: registering /proc/driver/radio-typhoon failed\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | #endif |
| 470 | |
| 471 | return 0; |
| 472 | } |
| 473 | |
| 474 | static void __exit typhoon_cleanup_module(void) |
| 475 | { |
| 476 | |
| 477 | #ifdef CONFIG_RADIO_TYPHOON_PROC_FS |
| 478 | remove_proc_entry("driver/radio-typhoon", NULL); |
| 479 | #endif |
| 480 | |
| 481 | video_unregister_device(&typhoon_radio); |
| 482 | release_region(io, 8); |
| 483 | } |
| 484 | |
| 485 | module_init(typhoon_init); |
| 486 | module_exit(typhoon_cleanup_module); |
| 487 | |