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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * adv7170 - adv7170, adv7171 video encoder driver version 0.0.14 *5 * Copyright (C) 2002 Maxim Yevtyushkin <max@linuxmedialabs.com>6 *7 * Based on adv7176 driver by:8 *9 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>10 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>11 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>12 * - some corrections for Pinnacle Systems Inc. DC10plus card.13 *14 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>15 * - moved over to linux>=2.4.x i2c protocol (1/1/2003)16 */17 18#include <linux/module.h>19#include <linux/types.h>20#include <linux/slab.h>21#include <linux/ioctl.h>22#include <linux/uaccess.h>23#include <linux/i2c.h>24#include <linux/videodev2.h>25#include <media/v4l2-device.h>26 27MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");28MODULE_AUTHOR("Maxim Yevtyushkin");29MODULE_LICENSE("GPL");30 31 32static int debug;33module_param(debug, int, 0);34MODULE_PARM_DESC(debug, "Debug level (0-1)");35 36/* ----------------------------------------------------------------------- */37 38struct adv7170 {39 struct v4l2_subdev sd;40 unsigned char reg[128];41 42 v4l2_std_id norm;43 int input;44};45 46static inline struct adv7170 *to_adv7170(struct v4l2_subdev *sd)47{48 return container_of(sd, struct adv7170, sd);49}50 51static char *inputs[] = { "pass_through", "play_back" };52 53static u32 adv7170_codes[] = {54 MEDIA_BUS_FMT_UYVY8_2X8,55 MEDIA_BUS_FMT_UYVY8_1X16,56};57 58/* ----------------------------------------------------------------------- */59 60static inline int adv7170_write(struct v4l2_subdev *sd, u8 reg, u8 value)61{62 struct i2c_client *client = v4l2_get_subdevdata(sd);63 struct adv7170 *encoder = to_adv7170(sd);64 65 encoder->reg[reg] = value;66 return i2c_smbus_write_byte_data(client, reg, value);67}68 69static inline int adv7170_read(struct v4l2_subdev *sd, u8 reg)70{71 struct i2c_client *client = v4l2_get_subdevdata(sd);72 73 return i2c_smbus_read_byte_data(client, reg);74}75 76static int adv7170_write_block(struct v4l2_subdev *sd,77 const u8 *data, unsigned int len)78{79 struct i2c_client *client = v4l2_get_subdevdata(sd);80 struct adv7170 *encoder = to_adv7170(sd);81 int ret = -1;82 u8 reg;83 84 /* the adv7170 has an autoincrement function, use it if85 * the adapter understands raw I2C */86 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {87 /* do raw I2C, not smbus compatible */88 u8 block_data[32];89 int block_len;90 91 while (len >= 2) {92 block_len = 0;93 block_data[block_len++] = reg = data[0];94 do {95 block_data[block_len++] =96 encoder->reg[reg++] = data[1];97 len -= 2;98 data += 2;99 } while (len >= 2 && data[0] == reg && block_len < 32);100 ret = i2c_master_send(client, block_data, block_len);101 if (ret < 0)102 break;103 }104 } else {105 /* do some slow I2C emulation kind of thing */106 while (len >= 2) {107 reg = *data++;108 ret = adv7170_write(sd, reg, *data++);109 if (ret < 0)110 break;111 len -= 2;112 }113 }114 return ret;115}116 117/* ----------------------------------------------------------------------- */118 119#define TR0MODE 0x4c120#define TR0RST 0x80121 122#define TR1CAPT 0x00123#define TR1PLAY 0x00124 125static const unsigned char init_NTSC[] = {126 0x00, 0x10, /* MR0 */127 0x01, 0x20, /* MR1 */128 0x02, 0x0e, /* MR2 RTC control: bits 2 and 1 */129 0x03, 0x80, /* MR3 */130 0x04, 0x30, /* MR4 */131 0x05, 0x00, /* Reserved */132 0x06, 0x00, /* Reserved */133 0x07, TR0MODE, /* TM0 */134 0x08, TR1CAPT, /* TM1 */135 0x09, 0x16, /* Fsc0 */136 0x0a, 0x7c, /* Fsc1 */137 0x0b, 0xf0, /* Fsc2 */138 0x0c, 0x21, /* Fsc3 */139 0x0d, 0x00, /* Subcarrier Phase */140 0x0e, 0x00, /* Closed Capt. Ext 0 */141 0x0f, 0x00, /* Closed Capt. Ext 1 */142 0x10, 0x00, /* Closed Capt. 0 */143 0x11, 0x00, /* Closed Capt. 1 */144 0x12, 0x00, /* Pedestal Ctl 0 */145 0x13, 0x00, /* Pedestal Ctl 1 */146 0x14, 0x00, /* Pedestal Ctl 2 */147 0x15, 0x00, /* Pedestal Ctl 3 */148 0x16, 0x00, /* CGMS_WSS_0 */149 0x17, 0x00, /* CGMS_WSS_1 */150 0x18, 0x00, /* CGMS_WSS_2 */151 0x19, 0x00, /* Teletext Ctl */152};153 154static const unsigned char init_PAL[] = {155 0x00, 0x71, /* MR0 */156 0x01, 0x20, /* MR1 */157 0x02, 0x0e, /* MR2 RTC control: bits 2 and 1 */158 0x03, 0x80, /* MR3 */159 0x04, 0x30, /* MR4 */160 0x05, 0x00, /* Reserved */161 0x06, 0x00, /* Reserved */162 0x07, TR0MODE, /* TM0 */163 0x08, TR1CAPT, /* TM1 */164 0x09, 0xcb, /* Fsc0 */165 0x0a, 0x8a, /* Fsc1 */166 0x0b, 0x09, /* Fsc2 */167 0x0c, 0x2a, /* Fsc3 */168 0x0d, 0x00, /* Subcarrier Phase */169 0x0e, 0x00, /* Closed Capt. Ext 0 */170 0x0f, 0x00, /* Closed Capt. Ext 1 */171 0x10, 0x00, /* Closed Capt. 0 */172 0x11, 0x00, /* Closed Capt. 1 */173 0x12, 0x00, /* Pedestal Ctl 0 */174 0x13, 0x00, /* Pedestal Ctl 1 */175 0x14, 0x00, /* Pedestal Ctl 2 */176 0x15, 0x00, /* Pedestal Ctl 3 */177 0x16, 0x00, /* CGMS_WSS_0 */178 0x17, 0x00, /* CGMS_WSS_1 */179 0x18, 0x00, /* CGMS_WSS_2 */180 0x19, 0x00, /* Teletext Ctl */181};182 183 184static int adv7170_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)185{186 struct adv7170 *encoder = to_adv7170(sd);187 188 v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);189 190 if (std & V4L2_STD_NTSC) {191 adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));192 if (encoder->input == 0)193 adv7170_write(sd, 0x02, 0x0e); /* Enable genlock */194 adv7170_write(sd, 0x07, TR0MODE | TR0RST);195 adv7170_write(sd, 0x07, TR0MODE);196 } else if (std & V4L2_STD_PAL) {197 adv7170_write_block(sd, init_PAL, sizeof(init_PAL));198 if (encoder->input == 0)199 adv7170_write(sd, 0x02, 0x0e); /* Enable genlock */200 adv7170_write(sd, 0x07, TR0MODE | TR0RST);201 adv7170_write(sd, 0x07, TR0MODE);202 } else {203 v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",204 (unsigned long long)std);205 return -EINVAL;206 }207 v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);208 encoder->norm = std;209 return 0;210}211 212static int adv7170_s_routing(struct v4l2_subdev *sd,213 u32 input, u32 output, u32 config)214{215 struct adv7170 *encoder = to_adv7170(sd);216 217 /* RJ: input = 0: input is from decoder218 input = 1: input is from ZR36060219 input = 2: color bar */220 221 v4l2_dbg(1, debug, sd, "set input from %s\n",222 input == 0 ? "decoder" : "ZR36060");223 224 switch (input) {225 case 0:226 adv7170_write(sd, 0x01, 0x20);227 adv7170_write(sd, 0x08, TR1CAPT); /* TR1 */228 adv7170_write(sd, 0x02, 0x0e); /* Enable genlock */229 adv7170_write(sd, 0x07, TR0MODE | TR0RST);230 adv7170_write(sd, 0x07, TR0MODE);231 /* udelay(10); */232 break;233 234 case 1:235 adv7170_write(sd, 0x01, 0x00);236 adv7170_write(sd, 0x08, TR1PLAY); /* TR1 */237 adv7170_write(sd, 0x02, 0x08);238 adv7170_write(sd, 0x07, TR0MODE | TR0RST);239 adv7170_write(sd, 0x07, TR0MODE);240 /* udelay(10); */241 break;242 243 default:244 v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);245 return -EINVAL;246 }247 v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);248 encoder->input = input;249 return 0;250}251 252static int adv7170_enum_mbus_code(struct v4l2_subdev *sd,253 struct v4l2_subdev_state *sd_state,254 struct v4l2_subdev_mbus_code_enum *code)255{256 if (code->pad || code->index >= ARRAY_SIZE(adv7170_codes))257 return -EINVAL;258 259 code->code = adv7170_codes[code->index];260 return 0;261}262 263static int adv7170_get_fmt(struct v4l2_subdev *sd,264 struct v4l2_subdev_state *sd_state,265 struct v4l2_subdev_format *format)266{267 struct v4l2_mbus_framefmt *mf = &format->format;268 u8 val = adv7170_read(sd, 0x7);269 270 if (format->pad)271 return -EINVAL;272 273 if ((val & 0x40) == (1 << 6))274 mf->code = MEDIA_BUS_FMT_UYVY8_1X16;275 else276 mf->code = MEDIA_BUS_FMT_UYVY8_2X8;277 278 mf->colorspace = V4L2_COLORSPACE_SMPTE170M;279 mf->width = 0;280 mf->height = 0;281 mf->field = V4L2_FIELD_ANY;282 283 return 0;284}285 286static int adv7170_set_fmt(struct v4l2_subdev *sd,287 struct v4l2_subdev_state *sd_state,288 struct v4l2_subdev_format *format)289{290 struct v4l2_mbus_framefmt *mf = &format->format;291 u8 val = adv7170_read(sd, 0x7);292 293 if (format->pad)294 return -EINVAL;295 296 switch (mf->code) {297 case MEDIA_BUS_FMT_UYVY8_2X8:298 val &= ~0x40;299 break;300 301 case MEDIA_BUS_FMT_UYVY8_1X16:302 val |= 0x40;303 break;304 305 default:306 v4l2_dbg(1, debug, sd,307 "illegal v4l2_mbus_framefmt code: %d\n", mf->code);308 return -EINVAL;309 }310 311 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)312 return adv7170_write(sd, 0x7, val);313 314 return 0;315}316 317/* ----------------------------------------------------------------------- */318 319static const struct v4l2_subdev_video_ops adv7170_video_ops = {320 .s_std_output = adv7170_s_std_output,321 .s_routing = adv7170_s_routing,322};323 324static const struct v4l2_subdev_pad_ops adv7170_pad_ops = {325 .enum_mbus_code = adv7170_enum_mbus_code,326 .get_fmt = adv7170_get_fmt,327 .set_fmt = adv7170_set_fmt,328};329 330static const struct v4l2_subdev_ops adv7170_ops = {331 .video = &adv7170_video_ops,332 .pad = &adv7170_pad_ops,333};334 335/* ----------------------------------------------------------------------- */336 337static int adv7170_probe(struct i2c_client *client)338{339 struct adv7170 *encoder;340 struct v4l2_subdev *sd;341 int i;342 343 /* Check if the adapter supports the needed features */344 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))345 return -ENODEV;346 347 v4l_info(client, "chip found @ 0x%x (%s)\n",348 client->addr << 1, client->adapter->name);349 350 encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);351 if (encoder == NULL)352 return -ENOMEM;353 sd = &encoder->sd;354 v4l2_i2c_subdev_init(sd, client, &adv7170_ops);355 encoder->norm = V4L2_STD_NTSC;356 encoder->input = 0;357 358 i = adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));359 if (i >= 0) {360 i = adv7170_write(sd, 0x07, TR0MODE | TR0RST);361 i = adv7170_write(sd, 0x07, TR0MODE);362 i = adv7170_read(sd, 0x12);363 v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);364 }365 if (i < 0)366 v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);367 return 0;368}369 370static void adv7170_remove(struct i2c_client *client)371{372 struct v4l2_subdev *sd = i2c_get_clientdata(client);373 374 v4l2_device_unregister_subdev(sd);375}376 377/* ----------------------------------------------------------------------- */378 379static const struct i2c_device_id adv7170_id[] = {380 { "adv7170" },381 { "adv7171" },382 { }383};384MODULE_DEVICE_TABLE(i2c, adv7170_id);385 386static struct i2c_driver adv7170_driver = {387 .driver = {388 .name = "adv7170",389 },390 .probe = adv7170_probe,391 .remove = adv7170_remove,392 .id_table = adv7170_id,393};394 395module_i2c_driver(adv7170_driver);396