ivtv-gpio.c (9766B)
1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 gpio functions. 4 Merging GPIO support into driver: 5 Copyright (C) 2004 Chris Kennedy <c@groovy.org> 6 Copyright (C) 2005-2007 Hans Verkuil <hverkuil@xs4all.nl> 7 8 */ 9 10#include "ivtv-driver.h" 11#include "ivtv-cards.h" 12#include "ivtv-gpio.h" 13#include "xc2028.h" 14#include <media/tuner.h> 15#include <media/v4l2-ctrls.h> 16 17/* 18 * GPIO assignment of Yuan MPG600/MPG160 19 * 20 * bit 15 14 13 12 | 11 10 9 8 | 7 6 5 4 | 3 2 1 0 21 * OUTPUT IN1 IN0 AM3 AM2 AM1 AM0 22 * INPUT DM1 DM0 23 * 24 * IN* : Input selection 25 * IN1 IN0 26 * 1 1 N/A 27 * 1 0 Line 28 * 0 1 N/A 29 * 0 0 Tuner 30 * 31 * AM* : Audio Mode 32 * AM3 0: Normal 1: Mixed(Sub+Main channel) 33 * AM2 0: Subchannel 1: Main channel 34 * AM1 0: Stereo 1: Mono 35 * AM0 0: Normal 1: Mute 36 * 37 * DM* : Detected tuner audio Mode 38 * DM1 0: Stereo 1: Mono 39 * DM0 0: Multiplex 1: Normal 40 * 41 * GPIO Initial Settings 42 * MPG600 MPG160 43 * DIR 0x3080 0x7080 44 * OUTPUT 0x000C 0x400C 45 * 46 * Special thanks to Makoto Iguchi <iguchi@tahoo.org> and Mr. Anonymous 47 * for analyzing GPIO of MPG160. 48 * 49 ***************************************************************************** 50 * 51 * GPIO assignment of Avermedia M179 (per information direct from AVerMedia) 52 * 53 * bit 15 14 13 12 | 11 10 9 8 | 7 6 5 4 | 3 2 1 0 54 * OUTPUT IN0 AM0 IN1 AM1 AM2 IN2 BR0 BR1 55 * INPUT 56 * 57 * IN* : Input selection 58 * IN0 IN1 IN2 59 * * 1 * Mute 60 * 0 0 0 Line-In 61 * 1 0 0 TV Tuner Audio 62 * 0 0 1 FM Audio 63 * 1 0 1 Mute 64 * 65 * AM* : Audio Mode 66 * AM0 AM1 AM2 67 * 0 0 0 TV Tuner Audio: L_OUT=(L+R)/2, R_OUT=SAP 68 * 0 0 1 TV Tuner Audio: L_OUT=R_OUT=SAP (SAP) 69 * 0 1 0 TV Tuner Audio: L_OUT=L, R_OUT=R (stereo) 70 * 0 1 1 TV Tuner Audio: mute 71 * 1 * * TV Tuner Audio: L_OUT=R_OUT=(L+R)/2 (mono) 72 * 73 * BR* : Audio Sample Rate (BR stands for bitrate for some reason) 74 * BR0 BR1 75 * 0 0 32 kHz 76 * 0 1 44.1 kHz 77 * 1 0 48 kHz 78 * 79 * DM* : Detected tuner audio Mode 80 * Unknown currently 81 * 82 * Special thanks to AVerMedia Technologies, Inc. and Jiun-Kuei Jung at 83 * AVerMedia for providing the GPIO information used to add support 84 * for the M179 cards. 85 */ 86 87/********************* GPIO stuffs *********************/ 88 89/* GPIO registers */ 90#define IVTV_REG_GPIO_IN 0x9008 91#define IVTV_REG_GPIO_OUT 0x900c 92#define IVTV_REG_GPIO_DIR 0x9020 93 94void ivtv_reset_ir_gpio(struct ivtv *itv) 95{ 96 int curdir, curout; 97 98 if (itv->card->type != IVTV_CARD_PVR_150) 99 return; 100 IVTV_DEBUG_INFO("Resetting PVR150 IR\n"); 101 curout = read_reg(IVTV_REG_GPIO_OUT); 102 curdir = read_reg(IVTV_REG_GPIO_DIR); 103 curdir |= 0x80; 104 write_reg(curdir, IVTV_REG_GPIO_DIR); 105 curout = (curout & ~0xF) | 1; 106 write_reg(curout, IVTV_REG_GPIO_OUT); 107 /* We could use something else for smaller time */ 108 schedule_timeout_interruptible(msecs_to_jiffies(1)); 109 curout |= 2; 110 write_reg(curout, IVTV_REG_GPIO_OUT); 111 curdir &= ~0x80; 112 write_reg(curdir, IVTV_REG_GPIO_DIR); 113} 114 115/* Xceive tuner reset function */ 116int ivtv_reset_tuner_gpio(void *dev, int component, int cmd, int value) 117{ 118 struct i2c_algo_bit_data *algo = dev; 119 struct ivtv *itv = algo->data; 120 u32 curout; 121 122 if (cmd != XC2028_TUNER_RESET) 123 return 0; 124 IVTV_DEBUG_INFO("Resetting tuner\n"); 125 curout = read_reg(IVTV_REG_GPIO_OUT); 126 curout &= ~(1 << itv->card->xceive_pin); 127 write_reg(curout, IVTV_REG_GPIO_OUT); 128 schedule_timeout_interruptible(msecs_to_jiffies(1)); 129 130 curout |= 1 << itv->card->xceive_pin; 131 write_reg(curout, IVTV_REG_GPIO_OUT); 132 schedule_timeout_interruptible(msecs_to_jiffies(1)); 133 return 0; 134} 135 136static inline struct ivtv *sd_to_ivtv(struct v4l2_subdev *sd) 137{ 138 return container_of(sd, struct ivtv, sd_gpio); 139} 140 141static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) 142{ 143 return &container_of(ctrl->handler, struct ivtv, hdl_gpio)->sd_gpio; 144} 145 146static int subdev_s_clock_freq(struct v4l2_subdev *sd, u32 freq) 147{ 148 struct ivtv *itv = sd_to_ivtv(sd); 149 u16 mask, data; 150 151 mask = itv->card->gpio_audio_freq.mask; 152 switch (freq) { 153 case 32000: 154 data = itv->card->gpio_audio_freq.f32000; 155 break; 156 case 44100: 157 data = itv->card->gpio_audio_freq.f44100; 158 break; 159 case 48000: 160 default: 161 data = itv->card->gpio_audio_freq.f48000; 162 break; 163 } 164 if (mask) 165 write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT); 166 return 0; 167} 168 169static int subdev_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt) 170{ 171 struct ivtv *itv = sd_to_ivtv(sd); 172 u16 mask; 173 174 mask = itv->card->gpio_audio_detect.mask; 175 if (mask == 0 || (read_reg(IVTV_REG_GPIO_IN) & mask)) 176 vt->rxsubchans = V4L2_TUNER_SUB_STEREO | 177 V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2; 178 else 179 vt->rxsubchans = V4L2_TUNER_SUB_MONO; 180 return 0; 181} 182 183static int subdev_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt) 184{ 185 struct ivtv *itv = sd_to_ivtv(sd); 186 u16 mask, data; 187 188 mask = itv->card->gpio_audio_mode.mask; 189 switch (vt->audmode) { 190 case V4L2_TUNER_MODE_LANG1: 191 data = itv->card->gpio_audio_mode.lang1; 192 break; 193 case V4L2_TUNER_MODE_LANG2: 194 data = itv->card->gpio_audio_mode.lang2; 195 break; 196 case V4L2_TUNER_MODE_MONO: 197 data = itv->card->gpio_audio_mode.mono; 198 break; 199 case V4L2_TUNER_MODE_STEREO: 200 case V4L2_TUNER_MODE_LANG1_LANG2: 201 default: 202 data = itv->card->gpio_audio_mode.stereo; 203 break; 204 } 205 if (mask) 206 write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT); 207 return 0; 208} 209 210static int subdev_s_radio(struct v4l2_subdev *sd) 211{ 212 struct ivtv *itv = sd_to_ivtv(sd); 213 u16 mask, data; 214 215 mask = itv->card->gpio_audio_input.mask; 216 data = itv->card->gpio_audio_input.radio; 217 if (mask) 218 write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT); 219 return 0; 220} 221 222static int subdev_s_audio_routing(struct v4l2_subdev *sd, 223 u32 input, u32 output, u32 config) 224{ 225 struct ivtv *itv = sd_to_ivtv(sd); 226 u16 mask, data; 227 228 if (input > 2) 229 return -EINVAL; 230 mask = itv->card->gpio_audio_input.mask; 231 switch (input) { 232 case 0: 233 data = itv->card->gpio_audio_input.tuner; 234 break; 235 case 1: 236 data = itv->card->gpio_audio_input.linein; 237 break; 238 case 2: 239 default: 240 data = itv->card->gpio_audio_input.radio; 241 break; 242 } 243 if (mask) 244 write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT); 245 return 0; 246} 247 248static int subdev_s_ctrl(struct v4l2_ctrl *ctrl) 249{ 250 struct v4l2_subdev *sd = to_sd(ctrl); 251 struct ivtv *itv = sd_to_ivtv(sd); 252 u16 mask, data; 253 254 switch (ctrl->id) { 255 case V4L2_CID_AUDIO_MUTE: 256 mask = itv->card->gpio_audio_mute.mask; 257 data = ctrl->val ? itv->card->gpio_audio_mute.mute : 0; 258 if (mask) 259 write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | 260 (data & mask), IVTV_REG_GPIO_OUT); 261 return 0; 262 } 263 return -EINVAL; 264} 265 266 267static int subdev_log_status(struct v4l2_subdev *sd) 268{ 269 struct ivtv *itv = sd_to_ivtv(sd); 270 271 IVTV_INFO("GPIO status: DIR=0x%04x OUT=0x%04x IN=0x%04x\n", 272 read_reg(IVTV_REG_GPIO_DIR), read_reg(IVTV_REG_GPIO_OUT), 273 read_reg(IVTV_REG_GPIO_IN)); 274 v4l2_ctrl_handler_log_status(&itv->hdl_gpio, sd->name); 275 return 0; 276} 277 278static int subdev_s_video_routing(struct v4l2_subdev *sd, 279 u32 input, u32 output, u32 config) 280{ 281 struct ivtv *itv = sd_to_ivtv(sd); 282 u16 mask, data; 283 284 if (input > 2) /* 0:Tuner 1:Composite 2:S-Video */ 285 return -EINVAL; 286 mask = itv->card->gpio_video_input.mask; 287 if (input == 0) 288 data = itv->card->gpio_video_input.tuner; 289 else if (input == 1) 290 data = itv->card->gpio_video_input.composite; 291 else 292 data = itv->card->gpio_video_input.svideo; 293 if (mask) 294 write_reg((read_reg(IVTV_REG_GPIO_OUT) & ~mask) | (data & mask), IVTV_REG_GPIO_OUT); 295 return 0; 296} 297 298static const struct v4l2_ctrl_ops gpio_ctrl_ops = { 299 .s_ctrl = subdev_s_ctrl, 300}; 301 302static const struct v4l2_subdev_core_ops subdev_core_ops = { 303 .log_status = subdev_log_status, 304}; 305 306static const struct v4l2_subdev_tuner_ops subdev_tuner_ops = { 307 .s_radio = subdev_s_radio, 308 .g_tuner = subdev_g_tuner, 309 .s_tuner = subdev_s_tuner, 310}; 311 312static const struct v4l2_subdev_audio_ops subdev_audio_ops = { 313 .s_clock_freq = subdev_s_clock_freq, 314 .s_routing = subdev_s_audio_routing, 315}; 316 317static const struct v4l2_subdev_video_ops subdev_video_ops = { 318 .s_routing = subdev_s_video_routing, 319}; 320 321static const struct v4l2_subdev_ops subdev_ops = { 322 .core = &subdev_core_ops, 323 .tuner = &subdev_tuner_ops, 324 .audio = &subdev_audio_ops, 325 .video = &subdev_video_ops, 326}; 327 328int ivtv_gpio_init(struct ivtv *itv) 329{ 330 u16 pin = 0; 331 332 if (itv->card->xceive_pin) 333 pin = 1 << itv->card->xceive_pin; 334 335 if ((itv->card->gpio_init.direction | pin) == 0) 336 return 0; 337 338 IVTV_DEBUG_INFO("GPIO initial dir: %08x out: %08x\n", 339 read_reg(IVTV_REG_GPIO_DIR), read_reg(IVTV_REG_GPIO_OUT)); 340 341 /* init output data then direction */ 342 write_reg(itv->card->gpio_init.initial_value | pin, IVTV_REG_GPIO_OUT); 343 write_reg(itv->card->gpio_init.direction | pin, IVTV_REG_GPIO_DIR); 344 v4l2_subdev_init(&itv->sd_gpio, &subdev_ops); 345 snprintf(itv->sd_gpio.name, sizeof(itv->sd_gpio.name), "%s-gpio", itv->v4l2_dev.name); 346 itv->sd_gpio.grp_id = IVTV_HW_GPIO; 347 v4l2_ctrl_handler_init(&itv->hdl_gpio, 1); 348 v4l2_ctrl_new_std(&itv->hdl_gpio, &gpio_ctrl_ops, 349 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); 350 if (itv->hdl_gpio.error) 351 return itv->hdl_gpio.error; 352 itv->sd_gpio.ctrl_handler = &itv->hdl_gpio; 353 v4l2_ctrl_handler_setup(&itv->hdl_gpio); 354 return v4l2_device_register_subdev(&itv->v4l2_dev, &itv->sd_gpio); 355}