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         current->state = TASK_INTERRUPTIBLE;
 119         schedule_timeout(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 #ifdef HAVE_XC3028
 127 int ivtv_reset_tuner_gpio(enum v4l2_tuner_type mode, void *priv, int ptr)
 128 {
 129         int curdir, curout;
 130         struct ivtv *itv = (struct ivtv *) priv;
 131
 132         if (itv->card->type != IVTV_CARD_PG600V2 || itv->options.tuner != TUNER_XCEIVE_XC3028)
 133                 return -EINVAL;
 134         IVTV_INFO("Resetting tuner.\n");
 135         curout = read_reg(IVTV_REG_GPIO_OUT);
 136         curdir = read_reg(IVTV_REG_GPIO_DIR);
 137         curdir |= (1 << 12);  /* GPIO bit 12 */
 138
 139         curout &= ~(1 << 12);
 140         write_reg(curout, IVTV_REG_GPIO_OUT);
 141         current->state = TASK_INTERRUPTIBLE;
 142         schedule_timeout(1);
 143
 144         curout |= (1 << 12);
 145         write_reg(curout, IVTV_REG_GPIO_OUT);
 146         current->state = TASK_INTERRUPTIBLE;
 147         schedule_timeout(1);
 148
 149         return 0;
 150 }
 151 #endif
 152
 153 void ivtv_gpio_init(struct ivtv *itv)
 154 {
 155         if (itv->card->gpio_init.direction == 0)
 156                 return;
 157
 158         IVTV_DEBUG_INFO("GPIO initial dir: %08x out: %08x\n",
 159                    read_reg(IVTV_REG_GPIO_DIR), read_reg(IVTV_REG_GPIO_OUT));
 160
 161         /* init output data then direction */
 162         write_reg(itv->card->gpio_init.initial_value, IVTV_REG_GPIO_OUT);
 163         write_reg(itv->card->gpio_init.direction, IVTV_REG_GPIO_DIR);
 164 }
 165
 166 static struct v4l2_queryctrl gpio_ctrl_mute = {
 167         .id            = V4L2_CID_AUDIO_MUTE,
 168         .type          = V4L2_CTRL_TYPE_BOOLEAN,
 169         .name          = "Mute",
 170         .minimum       = 0,
 171         .maximum       = 1,
 172         .step          = 1,
 173         .default_value = 1,
 174         .flags         = 0,
 175 };
 176
 177 int ivtv_gpio(struct ivtv *itv, unsigned int command, void *arg)
 178 {
 179         struct v4l2_tuner *tuner = arg;
 180         struct v4l2_control *ctrl = arg;
 181         struct v4l2_routing *route = arg;
 182         u16 mask, data;
 183
 184         switch (command) {
 185         case VIDIOC_INT_AUDIO_CLOCK_FREQ:
 186                 mask = itv->card->gpio_audio_freq.mask;
 187                 switch (*(u32 *)arg) {
 188                 case 32000:
 189                         data = itv->card->gpio_audio_freq.f32000;
 190                         break;
 191                 case 44100:
 192                         data = itv->card->gpio_audio_freq.f44100;
 193                         break;
 194                 case 48000:
 195                 default:
 196                         data = itv->card->gpio_audio_freq.f48000;
 197                         break;
 198                 }
 199                 break;
 200
 201         case VIDIOC_G_TUNER:
 202                 mask = itv->card->gpio_audio_detect.mask;
 203                 if (mask == 0 || (read_reg(IVTV_REG_GPIO_IN) & mask))
 204                         tuner->rxsubchans = V4L2_TUNER_MODE_STEREO |
 205                                V4L2_TUNER_MODE_LANG1 | V4L2_TUNER_MODE_LANG2;
 206                 else
 207                         tuner->rxsubchans = V4L2_TUNER_SUB_MONO;
 208                 return 0;
 209
 210         case VIDIOC_S_TUNER:
 211                 mask = itv->card->gpio_audio_mode.mask;
 212                 switch (tuner->audmode) {
 213                 case V4L2_TUNER_MODE_LANG1:
 214                         data = itv->card->gpio_audio_mode.lang1;
 215                         break;
 216                 case V4L2_TUNER_MODE_LANG2:
 217                         data = itv->card->gpio_audio_mode.lang2;
 218                         break;
 219                 case V4L2_TUNER_MODE_MONO:
 220                         data = itv->card->gpio_audio_mode.mono;
 221                         break;
 222                 case V4L2_TUNER_MODE_STEREO:
 223                 case V4L2_TUNER_MODE_LANG1_LANG2:
 224                 default:
 225                         data = itv->card->gpio_audio_mode.stereo;
 226                         break;
 227                 }
 228                 break;
 229
 230         case AUDC_SET_RADIO:
 231                 mask = itv->card->gpio_audio_input.mask;
 232                 data = itv->card->gpio_audio_input.radio;
 233                 break;
 234
 235         case VIDIOC_S_STD:
 236                 mask = itv->card->gpio_audio_input.mask;
 237                 data = itv->card->gpio_audio_input.tuner;
 238                 break;
 239
 240         case VIDIOC_INT_S_AUDIO_ROUTING:
 241                 if (route->input > 2)
 242                         return -EINVAL;
 243                 mask = itv->card->gpio_audio_input.mask;
 244                 switch (route->input) {
 245                         case 0:
 246                                 data = itv->card->gpio_audio_input.tuner;
 247                                 break;
 248                         case 1:
 249                                 data = itv->card->gpio_audio_input.linein;
 250                                 break;
 251                         case 2:
 252                         default:
 253                                 data = itv->card->gpio_audio_input.radio;
 254                                 break;
 255                 }
 256                 break;
 257
 258         case VIDIOC_G_CTRL:
 259                 if (ctrl->id != V4L2_CID_AUDIO_MUTE)
 260                         return -EINVAL;
 261                 mask = itv->card->gpio_audio_mute.mask;
 262                 data = itv->card->gpio_audio_mute.mute;
 263                 ctrl->value = (read_reg(IVTV_REG_GPIO_OUT) & mask) == data;
 264                 return 0;
 265
 266         case VIDIOC_S_CTRL:
 267                 if (ctrl->id != V4L2_CID_AUDIO_MUTE)
 268                         return -EINVAL;
 269                 mask = itv->card->gpio_audio_mute.mask;
 270                 data = ctrl->value ? itv->card->gpio_audio_mute.mute : 0;
 271                 break;
 272
 273         case VIDIOC_QUERYCTRL:
 274         {
 275                 struct v4l2_queryctrl *qc = arg;
 276
 277                 if (qc->id != V4L2_CID_AUDIO_MUTE)
 278                         return -EINVAL;
 279                 *qc = gpio_ctrl_mute;
 280                 return 0;
 281         }
 282
 283         case VIDIOC_LOG_STATUS:
 284                 IVTV_INFO("GPIO status: DIR=0x%04x OUT=0x%04x IN=0x%04x\n",
 285                         read_reg(IVTV_REG_GPIO_DIR), read_reg(IVTV_REG_GPIO_OUT),
 286                         read_reg(IVTV_REG_GPIO_IN));
 287                 return 0;
 288
 289         case VIDIOC_INT_S_VIDEO_ROUTING:
 290                 if (route->input > 2) /* 0:Tuner 1:Composite 2:S-Video */
 291                         return -EINVAL;
 292                 mask = itv->card->gpio_video_input.mask;
 293                 if  (route->input == 0)
 294                         data = itv->card->gpio_video_input.tuner;
 295                 else if  (route->input == 1)
 296                         data = itv->card->gpio_video_input.composite;
 297                 else
 298                         data = itv->card->gpio_video_input.svideo;
 299                 break;
 300
 301         default:
 302                 return -EINVAL;
 303         }
 304         if (mask)
 305                 write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT);
 306         return 0;
 307 }