drivers/media/video/ivtv/ivtv-gpio.c

   1 /*
   2     gpio functions.
   3     Merging GPIO support into driver:
   4     Copyright (C) 2004  Chris Kennedy <c@groovy.org>
   5     Copyright (C) 2005-2007  Hans Verkuil <hverkuil@xs4all.nl>
   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 #include "ivtv-driver.h"
  23 #include "ivtv-cards.h"
  24 #include "ivtv-gpio.h"
  25 #include "tuner-xc2028.h"
  26 #include <media/tuner.h>
  27
  28 /*
  29  * GPIO assignment of Yuan MPG600/MPG160
  30  *
  31  *    bit 15  14  13  12 |  11  10   9   8 |   7   6   5   4 |   3   2   1   0
  32  * OUTPUT         IN1 IN0                                       AM3 AM2 AM1 AM0
  33  *  INPUT                   DM1         DM0
  34  *
  35  *   IN* : Input selection
  36  *          IN1 IN0
  37  *           1   1  N/A
  38  *           1   0  Line
  39  *           0   1  N/A
  40  *           0   0  Tuner
  41  *
  42  *   AM* : Audio Mode
  43  *          AM3  0: Normal        1: Mixed(Sub+Main channel)
  44  *          AM2  0: Subchannel    1: Main channel
  45  *          AM1  0: Stereo        1: Mono
  46  *          AM0  0: Normal        1: Mute
  47  *
  48  *   DM* : Detected tuner audio Mode
  49  *          DM1  0: Stereo        1: Mono
  50  *          DM0  0: Multiplex     1: Normal
  51  *
  52  * GPIO Initial Settings
  53  *           MPG600   MPG160
  54  *     DIR   0x3080   0x7080
  55  *  OUTPUT   0x000C   0x400C
  56  *
  57  *  Special thanks to Makoto Iguchi <iguchi@tahoo.org> and Mr. Anonymous
  58  *  for analyzing GPIO of MPG160.
  59  *
  60  *****************************************************************************
  61  *
  62  * GPIO assignment of Avermedia M179 (per information direct from AVerMedia)
  63  *
  64  *    bit 15  14  13  12 |  11  10   9   8 |   7   6   5   4 |   3   2   1   0
  65  * OUTPUT IN0 AM0 IN1               AM1 AM2       IN2     BR0   BR1
  66  *  INPUT
  67  *
  68  *   IN* : Input selection
  69  *          IN0 IN1 IN2
  70  *           *   1   *  Mute
  71  *           0   0   0  Line-In
  72  *           1   0   0  TV Tuner Audio
  73  *           0   0   1  FM Audio
  74  *           1   0   1  Mute
  75  *
  76  *   AM* : Audio Mode
  77  *          AM0 AM1 AM2
  78  *           0   0   0  TV Tuner Audio: L_OUT=(L+R)/2, R_OUT=SAP
  79  *           0   0   1  TV Tuner Audio: L_OUT=R_OUT=SAP   (SAP)
  80  *           0   1   0  TV Tuner Audio: L_OUT=L, R_OUT=R   (stereo)
  81  *           0   1   1  TV Tuner Audio: mute
  82  *           1   *   *  TV Tuner Audio: L_OUT=R_OUT=(L+R)/2   (mono)
  83  *
  84  *   BR* : Audio Sample Rate (BR stands for bitrate for some reason)
  85  *          BR0 BR1
  86  *           0   0   32 kHz
  87  *           0   1   44.1 kHz
  88  *           1   0   48 kHz
  89  *
  90  *   DM* : Detected tuner audio Mode
  91  *         Unknown currently
  92  *
  93  * Special thanks to AVerMedia Technologies, Inc. and Jiun-Kuei Jung at
  94  * AVerMedia for providing the GPIO information used to add support
  95  * for the M179 cards.
  96  */
  97
  98 /********************* GPIO stuffs *********************/
  99
 100 /* GPIO registers */
 101 #define IVTV_REG_GPIO_IN    0x9008
 102 #define IVTV_REG_GPIO_OUT   0x900c
 103 #define IVTV_REG_GPIO_DIR   0x9020
 104
 105 void ivtv_reset_ir_gpio(struct ivtv *itv)
 106 {
 107         int curdir, curout;
 108
 109         if (itv->card->type != IVTV_CARD_PVR_150)
 110                 return;
 111         IVTV_DEBUG_INFO("Resetting PVR150 IR\n");
 112         curout = read_reg(IVTV_REG_GPIO_OUT);
 113         curdir = read_reg(IVTV_REG_GPIO_DIR);
 114         curdir |= 0x80;
 115         write_reg(curdir, IVTV_REG_GPIO_DIR);
 116         curout = (curout & ~0xF) | 1;
 117         write_reg(curout, IVTV_REG_GPIO_OUT);
 118         /* We could use something else for smaller time */
 119         schedule_timeout_interruptible(msecs_to_jiffies(1));
 120         curout |= 2;
 121         write_reg(curout, IVTV_REG_GPIO_OUT);
 122         curdir &= ~0x80;
 123         write_reg(curdir, IVTV_REG_GPIO_DIR);
 124 }
 125
 126 /* Xceive tuner reset function */
 127 int ivtv_reset_tuner_gpio(void *dev, int cmd, int value)
 128 {
 129         struct i2c_algo_bit_data *algo = dev;
 130         struct ivtv *itv = algo->data;
 131         int curdir, curout;
 132
 133         if (cmd != XC2028_TUNER_RESET)
 134                 return 0;
 135         IVTV_DEBUG_INFO("Resetting tuner\n");
 136         curout = read_reg(IVTV_REG_GPIO_OUT);
 137         curdir = read_reg(IVTV_REG_GPIO_DIR);
 138         curdir |= (1 << 12);  /* GPIO bit 12 */
 139
 140         curout &= ~(1 << 12);
 141         write_reg(curout, IVTV_REG_GPIO_OUT);
 142         schedule_timeout_interruptible(msecs_to_jiffies(1));
 143
 144         curout |= (1 << 12);
 145         write_reg(curout, IVTV_REG_GPIO_OUT);
 146         schedule_timeout_interruptible(msecs_to_jiffies(1));
 147         return 0;
 148 }
 149
 150 void ivtv_gpio_init(struct ivtv *itv)
 151 {
 152         if (itv->card->gpio_init.direction == 0)
 153                 return;
 154
 155         IVTV_DEBUG_INFO("GPIO initial dir: %08x out: %08x\n",
 156                    read_reg(IVTV_REG_GPIO_DIR), read_reg(IVTV_REG_GPIO_OUT));
 157
 158         /* init output data then direction */
 159         write_reg(itv->card->gpio_init.initial_value, IVTV_REG_GPIO_OUT);
 160         write_reg(itv->card->gpio_init.direction, IVTV_REG_GPIO_DIR);
 161 }
 162
 163 static struct v4l2_queryctrl gpio_ctrl_mute = {
 164         .id            = V4L2_CID_AUDIO_MUTE,
 165         .type          = V4L2_CTRL_TYPE_BOOLEAN,
 166         .name          = "Mute",
 167         .minimum       = 0,
 168         .maximum       = 1,
 169         .step          = 1,
 170         .default_value = 1,
 171         .flags         = 0,
 172 };
 173
 174 int ivtv_gpio(struct ivtv *itv, unsigned int command, void *arg)
 175 {
 176         struct v4l2_tuner *tuner = arg;
 177         struct v4l2_control *ctrl = arg;
 178         struct v4l2_routing *route = arg;
 179         u16 mask, data;
 180
 181         switch (command) {
 182         case VIDIOC_INT_AUDIO_CLOCK_FREQ:
 183                 mask = itv->card->gpio_audio_freq.mask;
 184                 switch (*(u32 *)arg) {
 185                 case 32000:
 186                         data = itv->card->gpio_audio_freq.f32000;
 187                         break;
 188                 case 44100:
 189                         data = itv->card->gpio_audio_freq.f44100;
 190                         break;
 191                 case 48000:
 192                 default:
 193                         data = itv->card->gpio_audio_freq.f48000;
 194                         break;
 195                 }
 196                 break;
 197
 198         case VIDIOC_G_TUNER:
 199                 mask = itv->card->gpio_audio_detect.mask;
 200                 if (mask == 0 || (read_reg(IVTV_REG_GPIO_IN) & mask))
 201                         tuner->rxsubchans = V4L2_TUNER_MODE_STEREO |
 202                                V4L2_TUNER_MODE_LANG1 | V4L2_TUNER_MODE_LANG2;
 203                 else
 204                         tuner->rxsubchans = V4L2_TUNER_SUB_MONO;
 205                 return 0;
 206
 207         case VIDIOC_S_TUNER:
 208                 mask = itv->card->gpio_audio_mode.mask;
 209                 switch (tuner->audmode) {
 210                 case V4L2_TUNER_MODE_LANG1:
 211                         data = itv->card->gpio_audio_mode.lang1;
 212                         break;
 213                 case V4L2_TUNER_MODE_LANG2:
 214                         data = itv->card->gpio_audio_mode.lang2;
 215                         break;
 216                 case V4L2_TUNER_MODE_MONO:
 217                         data = itv->card->gpio_audio_mode.mono;
 218                         break;
 219                 case V4L2_TUNER_MODE_STEREO:
 220                 case V4L2_TUNER_MODE_LANG1_LANG2:
 221                 default:
 222                         data = itv->card->gpio_audio_mode.stereo;
 223                         break;
 224                 }
 225                 break;
 226
 227         case AUDC_SET_RADIO:
 228                 mask = itv->card->gpio_audio_input.mask;
 229                 data = itv->card->gpio_audio_input.radio;
 230                 break;
 231
 232         case VIDIOC_S_STD:
 233                 mask = itv->card->gpio_audio_input.mask;
 234                 data = itv->card->gpio_audio_input.tuner;
 235                 break;
 236
 237         case VIDIOC_INT_S_AUDIO_ROUTING:
 238                 if (route->input > 2)
 239                         return -EINVAL;
 240                 mask = itv->card->gpio_audio_input.mask;
 241                 switch (route->input) {
 242                         case 0:
 243                                 data = itv->card->gpio_audio_input.tuner;
 244                                 break;
 245                         case 1:
 246                                 data = itv->card->gpio_audio_input.linein;
 247                                 break;
 248                         case 2:
 249                         default:
 250                                 data = itv->card->gpio_audio_input.radio;
 251                                 break;
 252                 }
 253                 break;
 254
 255         case VIDIOC_G_CTRL:
 256                 if (ctrl->id != V4L2_CID_AUDIO_MUTE)
 257                         return -EINVAL;
 258                 mask = itv->card->gpio_audio_mute.mask;
 259                 data = itv->card->gpio_audio_mute.mute;
 260                 ctrl->value = (read_reg(IVTV_REG_GPIO_OUT) & mask) == data;
 261                 return 0;
 262
 263         case VIDIOC_S_CTRL:
 264                 if (ctrl->id != V4L2_CID_AUDIO_MUTE)
 265                         return -EINVAL;
 266                 mask = itv->card->gpio_audio_mute.mask;
 267                 data = ctrl->value ? itv->card->gpio_audio_mute.mute : 0;
 268                 break;
 269
 270         case VIDIOC_QUERYCTRL:
 271         {
 272                 struct v4l2_queryctrl *qc = arg;
 273
 274                 if (qc->id != V4L2_CID_AUDIO_MUTE)
 275                         return -EINVAL;
 276                 *qc = gpio_ctrl_mute;
 277                 return 0;
 278         }
 279
 280         case VIDIOC_LOG_STATUS:
 281                 IVTV_INFO("GPIO status: DIR=0x%04x OUT=0x%04x IN=0x%04x\n",
 282                         read_reg(IVTV_REG_GPIO_DIR), read_reg(IVTV_REG_GPIO_OUT),
 283                         read_reg(IVTV_REG_GPIO_IN));
 284                 return 0;
 285
 286         case VIDIOC_INT_S_VIDEO_ROUTING:
 287                 if (route->input > 2) /* 0:Tuner 1:Composite 2:S-Video */
 288                         return -EINVAL;
 289                 mask = itv->card->gpio_video_input.mask;
 290                 if  (route->input == 0)
 291                         data = itv->card->gpio_video_input.tuner;
 292                 else if  (route->input == 1)
 293                         data = itv->card->gpio_video_input.composite;
 294                 else
 295                         data = itv->card->gpio_video_input.svideo;
 296                 break;
 297
 298         default:
 299                 return -EINVAL;
 300         }
 301         if (mask)
 302                 write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT);
 303         return 0;
 304 }