sound/i2c/other/tea575x-tuner.c

   1 /*
   2  *   ALSA driver for TEA5757/5759 Philips AM/FM radio tuner chips
   3  *
   4  *      Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
   5  *
   6  *
   7  *   This program is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License as published by
   9  *   the Free Software Foundation; either version 2 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  *
  21  */
  22
  23 #include <asm/io.h>
  24 #include <linux/delay.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/init.h>
  27 #include <linux/version.h>
  28 #include <sound/core.h>
  29 #include <sound/tea575x-tuner.h>
  30
  31 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  32 MODULE_DESCRIPTION("Routines for control of TEA5757/5759 Philips AM/FM radio tuner chips");
  33 MODULE_LICENSE("GPL");
  34
  35 static int radio_nr = -1;
  36 module_param(radio_nr, int, 0);
  37
  38 #define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
  39 #define FREQ_LO          (87 * 16000)
  40 #define FREQ_HI         (108 * 16000)
  41
  42 /*
  43  * definitions
  44  */
  45
  46 #define TEA575X_BIT_SEARCH      (1<<24)         /* 1 = search action, 0 = tuned */
  47 #define TEA575X_BIT_UPDOWN      (1<<23)         /* 0 = search down, 1 = search up */
  48 #define TEA575X_BIT_MONO        (1<<22)         /* 0 = stereo, 1 = mono */
  49 #define TEA575X_BIT_BAND_MASK   (3<<20)
  50 #define TEA575X_BIT_BAND_FM     (0<<20)
  51 #define TEA575X_BIT_BAND_MW     (1<<20)
  52 #define TEA575X_BIT_BAND_LW     (1<<21)
  53 #define TEA575X_BIT_BAND_SW     (1<<22)
  54 #define TEA575X_BIT_PORT_0      (1<<19)         /* user bit */
  55 #define TEA575X_BIT_PORT_1      (1<<18)         /* user bit */
  56 #define TEA575X_BIT_SEARCH_MASK (3<<16)         /* search level */
  57 #define TEA575X_BIT_SEARCH_5_28      (0<<16)    /* FM >5uV, AM >28uV */
  58 #define TEA575X_BIT_SEARCH_10_40     (1<<16)    /* FM >10uV, AM > 40uV */
  59 #define TEA575X_BIT_SEARCH_30_63     (2<<16)    /* FM >30uV, AM > 63uV */
  60 #define TEA575X_BIT_SEARCH_150_1000  (3<<16)    /* FM > 150uV, AM > 1000uV */
  61 #define TEA575X_BIT_DUMMY       (1<<15)         /* buffer */
  62 #define TEA575X_BIT_FREQ_MASK   0x7fff
  63
  64 static struct v4l2_queryctrl radio_qctrl[] = {
  65         {
  66                 .id            = V4L2_CID_AUDIO_MUTE,
  67                 .name          = "Mute",
  68                 .minimum       = 0,
  69                 .maximum       = 1,
  70                 .default_value = 1,
  71                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
  72         }
  73 };
  74
  75 /*
  76  * lowlevel part
  77  */
  78
  79 static void snd_tea575x_set_freq(struct snd_tea575x *tea)
  80 {
  81         unsigned long freq;
  82
  83         freq = tea->freq / 16;          /* to kHz */
  84         if (freq > 108000)
  85                 freq = 108000;
  86         if (freq < 87000)
  87                 freq = 87000;
  88         /* crystal fixup */
  89         if (tea->tea5759)
  90                 freq -= tea->freq_fixup;
  91         else
  92                 freq += tea->freq_fixup;
  93         /* freq /= 12.5 */
  94         freq *= 10;
  95         freq /= 125;
  96
  97         tea->val &= ~TEA575X_BIT_FREQ_MASK;
  98         tea->val |= freq & TEA575X_BIT_FREQ_MASK;
  99         tea->ops->write(tea, tea->val);
 100 }
 101
 102 /*
 103  * Linux Video interface
 104  */
 105
 106 static int vidioc_querycap(struct file *file, void  *priv,
 107                                         struct v4l2_capability *v)
 108 {
 109         struct snd_tea575x *tea = video_drvdata(file);
 110
 111         strcpy(v->card, tea->tea5759 ? "TEA5759" : "TEA5757");
 112         strlcpy(v->driver, "tea575x-tuner", sizeof(v->driver));
 113         strlcpy(v->card, "Maestro Radio", sizeof(v->card));
 114         sprintf(v->bus_info, "PCI");
 115         v->version = RADIO_VERSION;
 116         v->capabilities = V4L2_CAP_TUNER;
 117         return 0;
 118 }
 119
 120 static int vidioc_g_tuner(struct file *file, void *priv,
 121                                         struct v4l2_tuner *v)
 122 {
 123         if (v->index > 0)
 124                 return -EINVAL;
 125
 126         strcpy(v->name, "FM");
 127         v->type = V4L2_TUNER_RADIO;
 128         v->rangelow = FREQ_LO;
 129         v->rangehigh = FREQ_HI;
 130         v->rxsubchans = V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
 131         v->capability = V4L2_TUNER_CAP_LOW;
 132         v->audmode = V4L2_TUNER_MODE_MONO;
 133         v->signal = 0xffff;
 134         return 0;
 135 }
 136
 137 static int vidioc_s_tuner(struct file *file, void *priv,
 138                                         struct v4l2_tuner *v)
 139 {
 140         if (v->index > 0)
 141                 return -EINVAL;
 142         return 0;
 143 }
 144
 145 static int vidioc_g_frequency(struct file *file, void *priv,
 146                                         struct v4l2_frequency *f)
 147 {
 148         struct snd_tea575x *tea = video_drvdata(file);
 149
 150         f->type = V4L2_TUNER_RADIO;
 151         f->frequency = tea->freq;
 152         return 0;
 153 }
 154
 155 static int vidioc_s_frequency(struct file *file, void *priv,
 156                                         struct v4l2_frequency *f)
 157 {
 158         struct snd_tea575x *tea = video_drvdata(file);
 159
 160         if (f->frequency < FREQ_LO || f->frequency > FREQ_HI)
 161                 return -EINVAL;
 162
 163         tea->freq = f->frequency;
 164
 165         snd_tea575x_set_freq(tea);
 166
 167         return 0;
 168 }
 169
 170 static int vidioc_g_audio(struct file *file, void *priv,
 171                                         struct v4l2_audio *a)
 172 {
 173         if (a->index > 1)
 174                 return -EINVAL;
 175
 176         strcpy(a->name, "Radio");
 177         a->capability = V4L2_AUDCAP_STEREO;
 178         return 0;
 179 }
 180
 181 static int vidioc_s_audio(struct file *file, void *priv,
 182                                         struct v4l2_audio *a)
 183 {
 184         if (a->index != 0)
 185                 return -EINVAL;
 186         return 0;
 187 }
 188
 189 static int vidioc_queryctrl(struct file *file, void *priv,
 190                                         struct v4l2_queryctrl *qc)
 191 {
 192         int i;
 193
 194         for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
 195                 if (qc->id && qc->id == radio_qctrl[i].id) {
 196                         memcpy(qc, &(radio_qctrl[i]),
 197                                                 sizeof(*qc));
 198                         return 0;
 199                 }
 200         }
 201         return -EINVAL;
 202 }
 203
 204 static int vidioc_g_ctrl(struct file *file, void *priv,
 205                                         struct v4l2_control *ctrl)
 206 {
 207         struct snd_tea575x *tea = video_drvdata(file);
 208
 209         switch (ctrl->id) {
 210         case V4L2_CID_AUDIO_MUTE:
 211                 if (tea->ops->mute) {
 212                         ctrl->value = tea->mute;
 213                         return 0;
 214                 }
 215         }
 216         return -EINVAL;
 217 }
 218
 219 static int vidioc_s_ctrl(struct file *file, void *priv,
 220                                         struct v4l2_control *ctrl)
 221 {
 222         struct snd_tea575x *tea = video_drvdata(file);
 223
 224         switch (ctrl->id) {
 225         case V4L2_CID_AUDIO_MUTE:
 226                 if (tea->ops->mute) {
 227                         tea->ops->mute(tea, ctrl->value);
 228                         tea->mute = 1;
 229                         return 0;
 230                 }
 231         }
 232         return -EINVAL;
 233 }
 234
 235 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 236 {
 237         *i = 0;
 238         return 0;
 239 }
 240
 241 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 242 {
 243         if (i != 0)
 244                 return -EINVAL;
 245         return 0;
 246 }
 247
 248 static int snd_tea575x_exclusive_open(struct file *file)
 249 {
 250         struct snd_tea575x *tea = video_drvdata(file);
 251
 252         return test_and_set_bit(0, &tea->in_use) ? -EBUSY : 0;
 253 }
 254
 255 static int snd_tea575x_exclusive_release(struct file *file)
 256 {
 257         struct snd_tea575x *tea = video_drvdata(file);
 258
 259         clear_bit(0, &tea->in_use);
 260         return 0;
 261 }
 262
 263 static const struct v4l2_file_operations tea575x_fops = {
 264         .owner          = THIS_MODULE,
 265         .open           = snd_tea575x_exclusive_open,
 266         .release        = snd_tea575x_exclusive_release,
 267         .ioctl          = video_ioctl2,
 268 };
 269
 270 static const struct v4l2_ioctl_ops tea575x_ioctl_ops = {
 271         .vidioc_querycap    = vidioc_querycap,
 272         .vidioc_g_tuner     = vidioc_g_tuner,
 273         .vidioc_s_tuner     = vidioc_s_tuner,
 274         .vidioc_g_audio     = vidioc_g_audio,
 275         .vidioc_s_audio     = vidioc_s_audio,
 276         .vidioc_g_input     = vidioc_g_input,
 277         .vidioc_s_input     = vidioc_s_input,
 278         .vidioc_g_frequency = vidioc_g_frequency,
 279         .vidioc_s_frequency = vidioc_s_frequency,
 280         .vidioc_queryctrl   = vidioc_queryctrl,
 281         .vidioc_g_ctrl      = vidioc_g_ctrl,
 282         .vidioc_s_ctrl      = vidioc_s_ctrl,
 283 };
 284
 285 static struct video_device tea575x_radio = {
 286         .name           = "tea575x-tuner",
 287         .fops           = &tea575x_fops,
 288         .ioctl_ops      = &tea575x_ioctl_ops,
 289         .release        = video_device_release,
 290 };
 291
 292 /*
 293  * initialize all the tea575x chips
 294  */
 295 void snd_tea575x_init(struct snd_tea575x *tea)
 296 {
 297         int retval;
 298         unsigned int val;
 299         struct video_device *tea575x_radio_inst;
 300
 301         val = tea->ops->read(tea);
 302         if (val == 0x1ffffff || val == 0) {
 303                 snd_printk(KERN_ERR
 304                            "tea575x-tuner: Cannot find TEA575x chip\n");
 305                 return;
 306         }
 307
 308         tea->in_use = 0;
 309         tea->val = TEA575X_BIT_BAND_FM | TEA575X_BIT_SEARCH_10_40;
 310         tea->freq = 90500 * 16;         /* 90.5Mhz default */
 311
 312         tea575x_radio_inst = video_device_alloc();
 313         if (tea575x_radio_inst == NULL) {
 314                 printk(KERN_ERR "tea575x-tuner: not enough memory\n");
 315                 return;
 316         }
 317
 318         memcpy(tea575x_radio_inst, &tea575x_radio, sizeof(tea575x_radio));
 319
 320         strcpy(tea575x_radio.name, tea->tea5759 ?
 321                                    "TEA5759 radio" : "TEA5757 radio");
 322
 323         video_set_drvdata(tea575x_radio_inst, tea);
 324
 325         retval = video_register_device(tea575x_radio_inst,
 326                                        VFL_TYPE_RADIO, radio_nr);
 327         if (retval) {
 328                 printk(KERN_ERR "tea575x-tuner: can't register video device!\n");
 329                 kfree(tea575x_radio_inst);
 330                 return;
 331         }
 332
 333         snd_tea575x_set_freq(tea);
 334
 335         /* mute on init */
 336         if (tea->ops->mute) {
 337                 tea->ops->mute(tea, 1);
 338                 tea->mute = 1;
 339         }
 340         tea->vd = tea575x_radio_inst;
 341 }
 342
 343 void snd_tea575x_exit(struct snd_tea575x *tea)
 344 {
 345         if (tea->vd) {
 346                 video_unregister_device(tea->vd);
 347                 tea->vd = NULL;
 348         }
 349 }
 350
 351 static int __init alsa_tea575x_module_init(void)
 352 {
 353         return 0;
 354 }
 355
 356 static void __exit alsa_tea575x_module_exit(void)
 357 {
 358 }
 359
 360 module_init(alsa_tea575x_module_init)
 361 module_exit(alsa_tea575x_module_exit)
 362
 363 EXPORT_SYMBOL(snd_tea575x_init);
 364 EXPORT_SYMBOL(snd_tea575x_exit);