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