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