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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * adv7175 - adv7175a video encoder driver version 0.0.34 *5 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>6 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>7 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>8 * - some corrections for Pinnacle Systems Inc. DC10plus card.9 *10 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>11 * - moved over to linux>=2.4.x i2c protocol (9/9/2002)12 */13 14#include <linux/module.h>15#include <linux/types.h>16#include <linux/slab.h>17#include <linux/ioctl.h>18#include <linux/uaccess.h>19#include <linux/i2c.h>20#include <linux/videodev2.h>21#include <media/v4l2-device.h>22 23MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");24MODULE_AUTHOR("Dave Perks");25MODULE_LICENSE("GPL");26 27#define I2C_ADV7175 0xd428#define I2C_ADV7176 0x5429 30 31static int debug;32module_param(debug, int, 0);33MODULE_PARM_DESC(debug, "Debug level (0-1)");34 35/* ----------------------------------------------------------------------- */36 37struct adv7175 {38 struct v4l2_subdev sd;39 v4l2_std_id norm;40 int input;41};42 43static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)44{45 return container_of(sd, struct adv7175, sd);46}47 48static char *inputs[] = { "pass_through", "play_back", "color_bar" };49 50static u32 adv7175_codes[] = {51 MEDIA_BUS_FMT_UYVY8_2X8,52 MEDIA_BUS_FMT_UYVY8_1X16,53};54 55/* ----------------------------------------------------------------------- */56 57static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)58{59 struct i2c_client *client = v4l2_get_subdevdata(sd);60 61 return i2c_smbus_write_byte_data(client, reg, value);62}63 64static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)65{66 struct i2c_client *client = v4l2_get_subdevdata(sd);67 68 return i2c_smbus_read_byte_data(client, reg);69}70 71static int adv7175_write_block(struct v4l2_subdev *sd,72 const u8 *data, unsigned int len)73{74 struct i2c_client *client = v4l2_get_subdevdata(sd);75 int ret = -1;76 u8 reg;77 78 /* the adv7175 has an autoincrement function, use it if79 * the adapter understands raw I2C */80 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {81 /* do raw I2C, not smbus compatible */82 u8 block_data[32];83 int block_len;84 85 while (len >= 2) {86 block_len = 0;87 block_data[block_len++] = reg = data[0];88 do {89 block_data[block_len++] = data[1];90 reg++;91 len -= 2;92 data += 2;93 } while (len >= 2 && data[0] == reg && block_len < 32);94 ret = i2c_master_send(client, block_data, block_len);95 if (ret < 0)96 break;97 }98 } else {99 /* do some slow I2C emulation kind of thing */100 while (len >= 2) {101 reg = *data++;102 ret = adv7175_write(sd, reg, *data++);103 if (ret < 0)104 break;105 len -= 2;106 }107 }108 109 return ret;110}111 112static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)113{114 /* for some reason pass_through NTSC needs115 * a different sub-carrier freq to remain stable. */116 if (pass_through)117 adv7175_write(sd, 0x02, 0x00);118 else119 adv7175_write(sd, 0x02, 0x55);120 121 adv7175_write(sd, 0x03, 0x55);122 adv7175_write(sd, 0x04, 0x55);123 adv7175_write(sd, 0x05, 0x25);124}125 126/* ----------------------------------------------------------------------- */127/* Output filter: S-Video Composite */128 129#define MR050 0x11 /* 0x09 */130#define MR060 0x14 /* 0x0c */131 132/* ----------------------------------------------------------------------- */133 134#define TR0MODE 0x46135#define TR0RST 0x80136 137#define TR1CAPT 0x80138#define TR1PLAY 0x00139 140static const unsigned char init_common[] = {141 142 0x00, MR050, /* MR0, PAL enabled */143 0x01, 0x00, /* MR1 */144 0x02, 0x0c, /* subc. freq. */145 0x03, 0x8c, /* subc. freq. */146 0x04, 0x79, /* subc. freq. */147 0x05, 0x26, /* subc. freq. */148 0x06, 0x40, /* subc. phase */149 150 0x07, TR0MODE, /* TR0, 16bit */151 0x08, 0x21, /* */152 0x09, 0x00, /* */153 0x0a, 0x00, /* */154 0x0b, 0x00, /* */155 0x0c, TR1CAPT, /* TR1 */156 0x0d, 0x4f, /* MR2 */157 0x0e, 0x00, /* */158 0x0f, 0x00, /* */159 0x10, 0x00, /* */160 0x11, 0x00, /* */161};162 163static const unsigned char init_pal[] = {164 0x00, MR050, /* MR0, PAL enabled */165 0x01, 0x00, /* MR1 */166 0x02, 0x0c, /* subc. freq. */167 0x03, 0x8c, /* subc. freq. */168 0x04, 0x79, /* subc. freq. */169 0x05, 0x26, /* subc. freq. */170 0x06, 0x40, /* subc. phase */171};172 173static const unsigned char init_ntsc[] = {174 0x00, MR060, /* MR0, NTSC enabled */175 0x01, 0x00, /* MR1 */176 0x02, 0x55, /* subc. freq. */177 0x03, 0x55, /* subc. freq. */178 0x04, 0x55, /* subc. freq. */179 0x05, 0x25, /* subc. freq. */180 0x06, 0x1a, /* subc. phase */181};182 183static int adv7175_init(struct v4l2_subdev *sd, u32 val)184{185 /* This is just for testing!!! */186 adv7175_write_block(sd, init_common, sizeof(init_common));187 adv7175_write(sd, 0x07, TR0MODE | TR0RST);188 adv7175_write(sd, 0x07, TR0MODE);189 return 0;190}191 192static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)193{194 struct adv7175 *encoder = to_adv7175(sd);195 196 if (std & V4L2_STD_NTSC) {197 adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));198 if (encoder->input == 0)199 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */200 adv7175_write(sd, 0x07, TR0MODE | TR0RST);201 adv7175_write(sd, 0x07, TR0MODE);202 } else if (std & V4L2_STD_PAL) {203 adv7175_write_block(sd, init_pal, sizeof(init_pal));204 if (encoder->input == 0)205 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */206 adv7175_write(sd, 0x07, TR0MODE | TR0RST);207 adv7175_write(sd, 0x07, TR0MODE);208 } else if (std & V4L2_STD_SECAM) {209 /* This is an attempt to convert210 * SECAM->PAL (typically it does not work211 * due to genlock: when decoder is in SECAM212 * and encoder in in PAL the subcarrier can213 * not be synchronized with horizontal214 * quency) */215 adv7175_write_block(sd, init_pal, sizeof(init_pal));216 if (encoder->input == 0)217 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */218 adv7175_write(sd, 0x07, TR0MODE | TR0RST);219 adv7175_write(sd, 0x07, TR0MODE);220 } else {221 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",222 (unsigned long long)std);223 return -EINVAL;224 }225 v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);226 encoder->norm = std;227 return 0;228}229 230static int adv7175_s_routing(struct v4l2_subdev *sd,231 u32 input, u32 output, u32 config)232{233 struct adv7175 *encoder = to_adv7175(sd);234 235 /* RJ: input = 0: input is from decoder236 input = 1: input is from ZR36060237 input = 2: color bar */238 239 switch (input) {240 case 0:241 adv7175_write(sd, 0x01, 0x00);242 243 if (encoder->norm & V4L2_STD_NTSC)244 set_subcarrier_freq(sd, 1);245 246 adv7175_write(sd, 0x0c, TR1CAPT); /* TR1 */247 if (encoder->norm & V4L2_STD_SECAM)248 adv7175_write(sd, 0x0d, 0x49); /* Disable genlock */249 else250 adv7175_write(sd, 0x0d, 0x4f); /* Enable genlock */251 adv7175_write(sd, 0x07, TR0MODE | TR0RST);252 adv7175_write(sd, 0x07, TR0MODE);253 /*udelay(10);*/254 break;255 256 case 1:257 adv7175_write(sd, 0x01, 0x00);258 259 if (encoder->norm & V4L2_STD_NTSC)260 set_subcarrier_freq(sd, 0);261 262 adv7175_write(sd, 0x0c, TR1PLAY); /* TR1 */263 adv7175_write(sd, 0x0d, 0x49);264 adv7175_write(sd, 0x07, TR0MODE | TR0RST);265 adv7175_write(sd, 0x07, TR0MODE);266 /* udelay(10); */267 break;268 269 case 2:270 adv7175_write(sd, 0x01, 0x80);271 272 if (encoder->norm & V4L2_STD_NTSC)273 set_subcarrier_freq(sd, 0);274 275 adv7175_write(sd, 0x0d, 0x49);276 adv7175_write(sd, 0x07, TR0MODE | TR0RST);277 adv7175_write(sd, 0x07, TR0MODE);278 /* udelay(10); */279 break;280 281 default:282 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);283 return -EINVAL;284 }285 v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);286 encoder->input = input;287 return 0;288}289 290static int adv7175_enum_mbus_code(struct v4l2_subdev *sd,291 struct v4l2_subdev_state *sd_state,292 struct v4l2_subdev_mbus_code_enum *code)293{294 if (code->pad || code->index >= ARRAY_SIZE(adv7175_codes))295 return -EINVAL;296 297 code->code = adv7175_codes[code->index];298 return 0;299}300 301static int adv7175_get_fmt(struct v4l2_subdev *sd,302 struct v4l2_subdev_state *sd_state,303 struct v4l2_subdev_format *format)304{305 struct v4l2_mbus_framefmt *mf = &format->format;306 u8 val = adv7175_read(sd, 0x7);307 308 if (format->pad)309 return -EINVAL;310 311 if ((val & 0x40) == (1 << 6))312 mf->code = MEDIA_BUS_FMT_UYVY8_1X16;313 else314 mf->code = MEDIA_BUS_FMT_UYVY8_2X8;315 316 mf->colorspace = V4L2_COLORSPACE_SMPTE170M;317 mf->width = 0;318 mf->height = 0;319 mf->field = V4L2_FIELD_ANY;320 321 return 0;322}323 324static int adv7175_set_fmt(struct v4l2_subdev *sd,325 struct v4l2_subdev_state *sd_state,326 struct v4l2_subdev_format *format)327{328 struct v4l2_mbus_framefmt *mf = &format->format;329 u8 val = adv7175_read(sd, 0x7);330 int ret = 0;331 332 if (format->pad)333 return -EINVAL;334 335 switch (mf->code) {336 case MEDIA_BUS_FMT_UYVY8_2X8:337 val &= ~0x40;338 break;339 340 case MEDIA_BUS_FMT_UYVY8_1X16:341 val |= 0x40;342 break;343 344 default:345 v4l2_dbg(1, debug, sd,346 "illegal v4l2_mbus_framefmt code: %d\n", mf->code);347 return -EINVAL;348 }349 350 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)351 ret = adv7175_write(sd, 0x7, val);352 353 return ret;354}355 356static int adv7175_s_power(struct v4l2_subdev *sd, int on)357{358 if (on)359 adv7175_write(sd, 0x01, 0x00);360 else361 adv7175_write(sd, 0x01, 0x78);362 363 return 0;364}365 366/* ----------------------------------------------------------------------- */367 368static const struct v4l2_subdev_core_ops adv7175_core_ops = {369 .init = adv7175_init,370 .s_power = adv7175_s_power,371};372 373static const struct v4l2_subdev_video_ops adv7175_video_ops = {374 .s_std_output = adv7175_s_std_output,375 .s_routing = adv7175_s_routing,376};377 378static const struct v4l2_subdev_pad_ops adv7175_pad_ops = {379 .enum_mbus_code = adv7175_enum_mbus_code,380 .get_fmt = adv7175_get_fmt,381 .set_fmt = adv7175_set_fmt,382};383 384static const struct v4l2_subdev_ops adv7175_ops = {385 .core = &adv7175_core_ops,386 .video = &adv7175_video_ops,387 .pad = &adv7175_pad_ops,388};389 390/* ----------------------------------------------------------------------- */391 392static int adv7175_probe(struct i2c_client *client)393{394 int i;395 struct adv7175 *encoder;396 struct v4l2_subdev *sd;397 398 /* Check if the adapter supports the needed features */399 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))400 return -ENODEV;401 402 v4l_info(client, "chip found @ 0x%x (%s)\n",403 client->addr << 1, client->adapter->name);404 405 encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);406 if (encoder == NULL)407 return -ENOMEM;408 sd = &encoder->sd;409 v4l2_i2c_subdev_init(sd, client, &adv7175_ops);410 encoder->norm = V4L2_STD_NTSC;411 encoder->input = 0;412 413 i = adv7175_write_block(sd, init_common, sizeof(init_common));414 if (i >= 0) {415 i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);416 i = adv7175_write(sd, 0x07, TR0MODE);417 i = adv7175_read(sd, 0x12);418 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);419 }420 if (i < 0)421 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);422 return 0;423}424 425static void adv7175_remove(struct i2c_client *client)426{427 struct v4l2_subdev *sd = i2c_get_clientdata(client);428 429 v4l2_device_unregister_subdev(sd);430}431 432/* ----------------------------------------------------------------------- */433 434static const struct i2c_device_id adv7175_id[] = {435 { "adv7175" },436 { "adv7176" },437 { }438};439MODULE_DEVICE_TABLE(i2c, adv7175_id);440 441static struct i2c_driver adv7175_driver = {442 .driver = {443 .name = "adv7175",444 },445 .probe = adv7175_probe,446 .remove = adv7175_remove,447 .id_table = adv7175_id,448};449 450module_i2c_driver(adv7175_driver);451