1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Driver for Analog Devices ADV748X HDMI receiver with AFE 4 * 5 * Copyright (C) 2017 Renesas Electronics Corp. 6 * 7 * Authors: 8 * Koji Matsuoka <koji.matsuoka.xm@renesas.com> 9 * Niklas Söderlund <niklas.soderlund@ragnatech.se> 10 * Kieran Bingham <kieran.bingham@ideasonboard.com> 11 */ 12 13 #include <linux/delay.h> 14 #include <linux/errno.h> 15 #include <linux/i2c.h> 16 #include <linux/module.h> 17 #include <linux/mutex.h> 18 #include <linux/of_graph.h> 19 #include <linux/regmap.h> 20 #include <linux/slab.h> 21 #include <linux/v4l2-dv-timings.h> 22 23 #include <media/v4l2-ctrls.h> 24 #include <media/v4l2-device.h> 25 #include <media/v4l2-dv-timings.h> 26 #include <media/v4l2-fwnode.h> 27 #include <media/v4l2-ioctl.h> 28 29 #include "adv748x.h" 30 31 /* ----------------------------------------------------------------------------- 32 * Register manipulation 33 */ 34 35 #define ADV748X_REGMAP_CONF(n) \ 36 { \ 37 .name = n, \ 38 .reg_bits = 8, \ 39 .val_bits = 8, \ 40 .max_register = 0xff, \ 41 .cache_type = REGCACHE_NONE, \ 42 } 43 44 static const struct regmap_config adv748x_regmap_cnf[] = { 45 ADV748X_REGMAP_CONF("io"), 46 ADV748X_REGMAP_CONF("dpll"), 47 ADV748X_REGMAP_CONF("cp"), 48 ADV748X_REGMAP_CONF("hdmi"), 49 ADV748X_REGMAP_CONF("edid"), 50 ADV748X_REGMAP_CONF("repeater"), 51 ADV748X_REGMAP_CONF("infoframe"), 52 ADV748X_REGMAP_CONF("cbus"), 53 ADV748X_REGMAP_CONF("cec"), 54 ADV748X_REGMAP_CONF("sdp"), 55 ADV748X_REGMAP_CONF("txa"), 56 ADV748X_REGMAP_CONF("txb"), 57 }; 58 adv748x_configure_regmap(struct adv748x_state * state,int region)59 static int adv748x_configure_regmap(struct adv748x_state *state, int region) 60 { 61 int err; 62 63 if (!state->i2c_clients[region]) 64 return -ENODEV; 65 66 state->regmap[region] = 67 devm_regmap_init_i2c(state->i2c_clients[region], 68 &adv748x_regmap_cnf[region]); 69 70 if (IS_ERR(state->regmap[region])) { 71 err = PTR_ERR(state->regmap[region]); 72 adv_err(state, 73 "Error initializing regmap %d with error %d\n", 74 region, err); 75 return -EINVAL; 76 } 77 78 return 0; 79 } 80 struct adv748x_register_map { 81 const char *name; 82 u8 default_addr; 83 }; 84 85 static const struct adv748x_register_map adv748x_default_addresses[] = { 86 [ADV748X_PAGE_IO] = { "main", 0x70 }, 87 [ADV748X_PAGE_DPLL] = { "dpll", 0x26 }, 88 [ADV748X_PAGE_CP] = { "cp", 0x22 }, 89 [ADV748X_PAGE_HDMI] = { "hdmi", 0x34 }, 90 [ADV748X_PAGE_EDID] = { "edid", 0x36 }, 91 [ADV748X_PAGE_REPEATER] = { "repeater", 0x32 }, 92 [ADV748X_PAGE_INFOFRAME] = { "infoframe", 0x31 }, 93 [ADV748X_PAGE_CBUS] = { "cbus", 0x30 }, 94 [ADV748X_PAGE_CEC] = { "cec", 0x41 }, 95 [ADV748X_PAGE_SDP] = { "sdp", 0x79 }, 96 [ADV748X_PAGE_TXB] = { "txb", 0x48 }, 97 [ADV748X_PAGE_TXA] = { "txa", 0x4a }, 98 }; 99 adv748x_read_check(struct adv748x_state * state,int client_page,u8 reg)100 static int adv748x_read_check(struct adv748x_state *state, 101 int client_page, u8 reg) 102 { 103 struct i2c_client *client = state->i2c_clients[client_page]; 104 int err; 105 unsigned int val; 106 107 err = regmap_read(state->regmap[client_page], reg, &val); 108 109 if (err) { 110 adv_err(state, "error reading %02x, %02x\n", 111 client->addr, reg); 112 return err; 113 } 114 115 return val; 116 } 117 adv748x_read(struct adv748x_state * state,u8 page,u8 reg)118 int adv748x_read(struct adv748x_state *state, u8 page, u8 reg) 119 { 120 return adv748x_read_check(state, page, reg); 121 } 122 adv748x_write(struct adv748x_state * state,u8 page,u8 reg,u8 value)123 int adv748x_write(struct adv748x_state *state, u8 page, u8 reg, u8 value) 124 { 125 return regmap_write(state->regmap[page], reg, value); 126 } 127 adv748x_write_check(struct adv748x_state * state,u8 page,u8 reg,u8 value,int * error)128 static int adv748x_write_check(struct adv748x_state *state, u8 page, u8 reg, 129 u8 value, int *error) 130 { 131 if (*error) 132 return *error; 133 134 *error = adv748x_write(state, page, reg, value); 135 return *error; 136 } 137 138 /* adv748x_write_block(): Write raw data with a maximum of I2C_SMBUS_BLOCK_MAX 139 * size to one or more registers. 140 * 141 * A value of zero will be returned on success, a negative errno will 142 * be returned in error cases. 143 */ adv748x_write_block(struct adv748x_state * state,int client_page,unsigned int init_reg,const void * val,size_t val_len)144 int adv748x_write_block(struct adv748x_state *state, int client_page, 145 unsigned int init_reg, const void *val, 146 size_t val_len) 147 { 148 struct regmap *regmap = state->regmap[client_page]; 149 150 if (val_len > I2C_SMBUS_BLOCK_MAX) 151 val_len = I2C_SMBUS_BLOCK_MAX; 152 153 return regmap_raw_write(regmap, init_reg, val, val_len); 154 } 155 adv748x_set_slave_addresses(struct adv748x_state * state)156 static int adv748x_set_slave_addresses(struct adv748x_state *state) 157 { 158 struct i2c_client *client; 159 unsigned int i; 160 u8 io_reg; 161 162 for (i = ADV748X_PAGE_DPLL; i < ADV748X_PAGE_MAX; ++i) { 163 io_reg = ADV748X_IO_SLAVE_ADDR_BASE + i; 164 client = state->i2c_clients[i]; 165 166 io_write(state, io_reg, client->addr << 1); 167 } 168 169 return 0; 170 } 171 adv748x_unregister_clients(struct adv748x_state * state)172 static void adv748x_unregister_clients(struct adv748x_state *state) 173 { 174 unsigned int i; 175 176 for (i = 1; i < ARRAY_SIZE(state->i2c_clients); ++i) 177 i2c_unregister_device(state->i2c_clients[i]); 178 } 179 adv748x_initialise_clients(struct adv748x_state * state)180 static int adv748x_initialise_clients(struct adv748x_state *state) 181 { 182 unsigned int i; 183 int ret; 184 185 for (i = ADV748X_PAGE_DPLL; i < ADV748X_PAGE_MAX; ++i) { 186 state->i2c_clients[i] = i2c_new_ancillary_device( 187 state->client, 188 adv748x_default_addresses[i].name, 189 adv748x_default_addresses[i].default_addr); 190 191 if (IS_ERR(state->i2c_clients[i])) { 192 adv_err(state, "failed to create i2c client %u\n", i); 193 return PTR_ERR(state->i2c_clients[i]); 194 } 195 196 ret = adv748x_configure_regmap(state, i); 197 if (ret) 198 return ret; 199 } 200 201 return 0; 202 } 203 204 /** 205 * struct adv748x_reg_value - Register write instruction 206 * @page: Regmap page identifier 207 * @reg: I2C register 208 * @value: value to write to @page at @reg 209 */ 210 struct adv748x_reg_value { 211 u8 page; 212 u8 reg; 213 u8 value; 214 }; 215 adv748x_write_regs(struct adv748x_state * state,const struct adv748x_reg_value * regs)216 static int adv748x_write_regs(struct adv748x_state *state, 217 const struct adv748x_reg_value *regs) 218 { 219 int ret; 220 221 for (; regs->page != ADV748X_PAGE_EOR; regs++) { 222 ret = adv748x_write(state, regs->page, regs->reg, regs->value); 223 if (ret < 0) { 224 adv_err(state, "Error regs page: 0x%02x reg: 0x%02x\n", 225 regs->page, regs->reg); 226 return ret; 227 } 228 } 229 230 return 0; 231 } 232 233 /* ----------------------------------------------------------------------------- 234 * TXA and TXB 235 */ 236 adv748x_power_up_tx(struct adv748x_csi2 * tx)237 static int adv748x_power_up_tx(struct adv748x_csi2 *tx) 238 { 239 struct adv748x_state *state = tx->state; 240 u8 page = is_txa(tx) ? ADV748X_PAGE_TXA : ADV748X_PAGE_TXB; 241 int ret = 0; 242 243 /* Enable n-lane MIPI */ 244 adv748x_write_check(state, page, 0x00, 0x80 | tx->active_lanes, &ret); 245 246 /* Set Auto DPHY Timing */ 247 adv748x_write_check(state, page, 0x00, 0xa0 | tx->active_lanes, &ret); 248 249 /* ADI Required Write */ 250 if (tx->src == &state->hdmi.sd) { 251 adv748x_write_check(state, page, 0xdb, 0x10, &ret); 252 adv748x_write_check(state, page, 0xd6, 0x07, &ret); 253 } else { 254 adv748x_write_check(state, page, 0xd2, 0x40, &ret); 255 } 256 257 adv748x_write_check(state, page, 0xc4, 0x0a, &ret); 258 adv748x_write_check(state, page, 0x71, 0x33, &ret); 259 adv748x_write_check(state, page, 0x72, 0x11, &ret); 260 261 /* i2c_dphy_pwdn - 1'b0 */ 262 adv748x_write_check(state, page, 0xf0, 0x00, &ret); 263 264 /* ADI Required Writes*/ 265 adv748x_write_check(state, page, 0x31, 0x82, &ret); 266 adv748x_write_check(state, page, 0x1e, 0x40, &ret); 267 268 /* i2c_mipi_pll_en - 1'b1 */ 269 adv748x_write_check(state, page, 0xda, 0x01, &ret); 270 usleep_range(2000, 2500); 271 272 /* Power-up CSI-TX */ 273 adv748x_write_check(state, page, 0x00, 0x20 | tx->active_lanes, &ret); 274 usleep_range(1000, 1500); 275 276 /* ADI Required Writes */ 277 adv748x_write_check(state, page, 0xc1, 0x2b, &ret); 278 usleep_range(1000, 1500); 279 adv748x_write_check(state, page, 0x31, 0x80, &ret); 280 281 return ret; 282 } 283 adv748x_power_down_tx(struct adv748x_csi2 * tx)284 static int adv748x_power_down_tx(struct adv748x_csi2 *tx) 285 { 286 struct adv748x_state *state = tx->state; 287 u8 page = is_txa(tx) ? ADV748X_PAGE_TXA : ADV748X_PAGE_TXB; 288 int ret = 0; 289 290 /* ADI Required Writes */ 291 adv748x_write_check(state, page, 0x31, 0x82, &ret); 292 adv748x_write_check(state, page, 0x1e, 0x00, &ret); 293 294 /* Enable n-lane MIPI */ 295 adv748x_write_check(state, page, 0x00, 0x80 | tx->active_lanes, &ret); 296 297 /* i2c_mipi_pll_en - 1'b1 */ 298 adv748x_write_check(state, page, 0xda, 0x01, &ret); 299 300 /* ADI Required Write */ 301 adv748x_write_check(state, page, 0xc1, 0x3b, &ret); 302 303 return ret; 304 } 305 adv748x_tx_power(struct adv748x_csi2 * tx,bool on)306 int adv748x_tx_power(struct adv748x_csi2 *tx, bool on) 307 { 308 int val; 309 310 if (!is_tx_enabled(tx)) 311 return 0; 312 313 val = tx_read(tx, ADV748X_CSI_FS_AS_LS); 314 if (val < 0) 315 return val; 316 317 /* 318 * This test against BIT(6) is not documented by the datasheet, but was 319 * specified in the downstream driver. 320 * Track with a WARN_ONCE to determine if it is ever set by HW. 321 */ 322 WARN_ONCE((on && val & ADV748X_CSI_FS_AS_LS_UNKNOWN), 323 "Enabling with unknown bit set"); 324 325 return on ? adv748x_power_up_tx(tx) : adv748x_power_down_tx(tx); 326 } 327 328 /* ----------------------------------------------------------------------------- 329 * Media Operations 330 */ adv748x_link_setup(struct media_entity * entity,const struct media_pad * local,const struct media_pad * remote,u32 flags)331 static int adv748x_link_setup(struct media_entity *entity, 332 const struct media_pad *local, 333 const struct media_pad *remote, u32 flags) 334 { 335 struct v4l2_subdev *rsd = media_entity_to_v4l2_subdev(remote->entity); 336 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); 337 struct adv748x_state *state = v4l2_get_subdevdata(sd); 338 struct adv748x_csi2 *tx = adv748x_sd_to_csi2(sd); 339 bool enable = flags & MEDIA_LNK_FL_ENABLED; 340 u8 io10_mask = ADV748X_IO_10_CSI1_EN | 341 ADV748X_IO_10_CSI4_EN | 342 ADV748X_IO_10_CSI4_IN_SEL_AFE; 343 u8 io10 = 0; 344 345 /* Refuse to enable multiple links to the same TX at the same time. */ 346 if (enable && tx->src) 347 return -EINVAL; 348 349 /* Set or clear the source (HDMI or AFE) and the current TX. */ 350 if (rsd == &state->afe.sd) 351 state->afe.tx = enable ? tx : NULL; 352 else 353 state->hdmi.tx = enable ? tx : NULL; 354 355 tx->src = enable ? rsd : NULL; 356 357 if (state->afe.tx) { 358 /* AFE Requires TXA enabled, even when output to TXB */ 359 io10 |= ADV748X_IO_10_CSI4_EN; 360 if (is_txa(tx)) { 361 /* 362 * Output from the SD-core (480i and 576i) from the TXA 363 * interface requires reducing the number of enabled 364 * data lanes in order to guarantee a valid link 365 * frequency. 366 */ 367 tx->active_lanes = min(tx->num_lanes, 2U); 368 io10 |= ADV748X_IO_10_CSI4_IN_SEL_AFE; 369 } else { 370 /* TXB has a single data lane, no need to adjust. */ 371 io10 |= ADV748X_IO_10_CSI1_EN; 372 } 373 } 374 375 if (state->hdmi.tx) { 376 /* 377 * Restore the number of active lanes, in case we have gone 378 * through an AFE->TXA streaming sessions. 379 */ 380 tx->active_lanes = tx->num_lanes; 381 io10 |= ADV748X_IO_10_CSI4_EN; 382 } 383 384 return io_clrset(state, ADV748X_IO_10, io10_mask, io10); 385 } 386 387 static const struct media_entity_operations adv748x_tx_media_ops = { 388 .link_setup = adv748x_link_setup, 389 .link_validate = v4l2_subdev_link_validate, 390 }; 391 392 static const struct media_entity_operations adv748x_media_ops = { 393 .link_validate = v4l2_subdev_link_validate, 394 }; 395 396 /* ----------------------------------------------------------------------------- 397 * HW setup 398 */ 399 400 /* Initialize CP Core with RGB888 format. */ 401 static const struct adv748x_reg_value adv748x_init_hdmi[] = { 402 /* Disable chip powerdown & Enable HDMI Rx block */ 403 {ADV748X_PAGE_IO, 0x00, 0x40}, 404 405 {ADV748X_PAGE_REPEATER, 0x40, 0x83}, /* Enable HDCP 1.1 */ 406 407 {ADV748X_PAGE_HDMI, 0x00, 0x08},/* Foreground Channel = A */ 408 {ADV748X_PAGE_HDMI, 0x98, 0xff},/* ADI Required Write */ 409 {ADV748X_PAGE_HDMI, 0x99, 0xa3},/* ADI Required Write */ 410 {ADV748X_PAGE_HDMI, 0x9a, 0x00},/* ADI Required Write */ 411 {ADV748X_PAGE_HDMI, 0x9b, 0x0a},/* ADI Required Write */ 412 {ADV748X_PAGE_HDMI, 0x9d, 0x40},/* ADI Required Write */ 413 {ADV748X_PAGE_HDMI, 0xcb, 0x09},/* ADI Required Write */ 414 {ADV748X_PAGE_HDMI, 0x3d, 0x10},/* ADI Required Write */ 415 {ADV748X_PAGE_HDMI, 0x3e, 0x7b},/* ADI Required Write */ 416 {ADV748X_PAGE_HDMI, 0x3f, 0x5e},/* ADI Required Write */ 417 {ADV748X_PAGE_HDMI, 0x4e, 0xfe},/* ADI Required Write */ 418 {ADV748X_PAGE_HDMI, 0x4f, 0x18},/* ADI Required Write */ 419 {ADV748X_PAGE_HDMI, 0x57, 0xa3},/* ADI Required Write */ 420 {ADV748X_PAGE_HDMI, 0x58, 0x04},/* ADI Required Write */ 421 {ADV748X_PAGE_HDMI, 0x85, 0x10},/* ADI Required Write */ 422 423 {ADV748X_PAGE_HDMI, 0x83, 0x00},/* Enable All Terminations */ 424 {ADV748X_PAGE_HDMI, 0xa3, 0x01},/* ADI Required Write */ 425 {ADV748X_PAGE_HDMI, 0xbe, 0x00},/* ADI Required Write */ 426 427 {ADV748X_PAGE_HDMI, 0x6c, 0x01},/* HPA Manual Enable */ 428 {ADV748X_PAGE_HDMI, 0xf8, 0x01},/* HPA Asserted */ 429 {ADV748X_PAGE_HDMI, 0x0f, 0x00},/* Audio Mute Speed Set to Fastest */ 430 /* (Smallest Step Size) */ 431 432 {ADV748X_PAGE_IO, 0x04, 0x02}, /* RGB Out of CP */ 433 {ADV748X_PAGE_IO, 0x12, 0xf0}, /* CSC Depends on ip Packets, SDR 444 */ 434 {ADV748X_PAGE_IO, 0x17, 0x80}, /* Luma & Chroma can reach 254d */ 435 {ADV748X_PAGE_IO, 0x03, 0x86}, /* CP-Insert_AV_Code */ 436 437 {ADV748X_PAGE_CP, 0x7c, 0x00}, /* ADI Required Write */ 438 439 {ADV748X_PAGE_IO, 0x0c, 0xe0}, /* Enable LLC_DLL & Double LLC Timing */ 440 {ADV748X_PAGE_IO, 0x0e, 0xdd}, /* LLC/PIX/SPI PINS TRISTATED AUD */ 441 442 {ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */ 443 }; 444 445 /* Initialize AFE core with YUV8 format. */ 446 static const struct adv748x_reg_value adv748x_init_afe[] = { 447 {ADV748X_PAGE_IO, 0x00, 0x30}, /* Disable chip powerdown Rx */ 448 {ADV748X_PAGE_IO, 0xf2, 0x01}, /* Enable I2C Read Auto-Increment */ 449 450 {ADV748X_PAGE_IO, 0x0e, 0xff}, /* LLC/PIX/AUD/SPI PINS TRISTATED */ 451 452 {ADV748X_PAGE_SDP, 0x0f, 0x00}, /* Exit Power Down Mode */ 453 {ADV748X_PAGE_SDP, 0x52, 0xcd}, /* ADI Required Write */ 454 455 {ADV748X_PAGE_SDP, 0x0e, 0x80}, /* ADI Required Write */ 456 {ADV748X_PAGE_SDP, 0x9c, 0x00}, /* ADI Required Write */ 457 {ADV748X_PAGE_SDP, 0x9c, 0xff}, /* ADI Required Write */ 458 {ADV748X_PAGE_SDP, 0x0e, 0x00}, /* ADI Required Write */ 459 460 /* ADI recommended writes for improved video quality */ 461 {ADV748X_PAGE_SDP, 0x80, 0x51}, /* ADI Required Write */ 462 {ADV748X_PAGE_SDP, 0x81, 0x51}, /* ADI Required Write */ 463 {ADV748X_PAGE_SDP, 0x82, 0x68}, /* ADI Required Write */ 464 465 {ADV748X_PAGE_SDP, 0x03, 0x42}, /* Tri-S Output , PwrDwn 656 pads */ 466 {ADV748X_PAGE_SDP, 0x04, 0xb5}, /* ITU-R BT.656-4 compatible */ 467 {ADV748X_PAGE_SDP, 0x13, 0x00}, /* ADI Required Write */ 468 469 {ADV748X_PAGE_SDP, 0x17, 0x41}, /* Select SH1 */ 470 {ADV748X_PAGE_SDP, 0x31, 0x12}, /* ADI Required Write */ 471 {ADV748X_PAGE_SDP, 0xe6, 0x4f}, /* V bit end pos manually in NTSC */ 472 473 {ADV748X_PAGE_EOR, 0xff, 0xff} /* End of register table */ 474 }; 475 adv748x_sw_reset(struct adv748x_state * state)476 static int adv748x_sw_reset(struct adv748x_state *state) 477 { 478 int ret; 479 480 ret = io_write(state, ADV748X_IO_REG_FF, ADV748X_IO_REG_FF_MAIN_RESET); 481 if (ret) 482 return ret; 483 484 usleep_range(5000, 6000); 485 486 /* Disable CEC Wakeup from power-down mode */ 487 ret = io_clrset(state, ADV748X_IO_REG_01, ADV748X_IO_REG_01_PWRDN_MASK, 488 ADV748X_IO_REG_01_PWRDNB); 489 if (ret) 490 return ret; 491 492 /* Enable I2C Read Auto-Increment for consecutive reads */ 493 return io_write(state, ADV748X_IO_REG_F2, 494 ADV748X_IO_REG_F2_READ_AUTO_INC); 495 } 496 adv748x_reset(struct adv748x_state * state)497 static int adv748x_reset(struct adv748x_state *state) 498 { 499 int ret; 500 u8 regval = 0; 501 502 ret = adv748x_sw_reset(state); 503 if (ret < 0) 504 return ret; 505 506 ret = adv748x_set_slave_addresses(state); 507 if (ret < 0) 508 return ret; 509 510 /* Initialize CP and AFE cores. */ 511 ret = adv748x_write_regs(state, adv748x_init_hdmi); 512 if (ret) 513 return ret; 514 515 ret = adv748x_write_regs(state, adv748x_init_afe); 516 if (ret) 517 return ret; 518 519 adv748x_afe_s_input(&state->afe, state->afe.input); 520 521 adv_dbg(state, "AFE Default input set to %d\n", state->afe.input); 522 523 /* Reset TXA and TXB */ 524 adv748x_tx_power(&state->txa, 1); 525 adv748x_tx_power(&state->txa, 0); 526 adv748x_tx_power(&state->txb, 1); 527 adv748x_tx_power(&state->txb, 0); 528 529 /* Disable chip powerdown & Enable HDMI Rx block */ 530 io_write(state, ADV748X_IO_PD, ADV748X_IO_PD_RX_EN); 531 532 /* Conditionally enable TXa and TXb. */ 533 if (is_tx_enabled(&state->txa)) { 534 regval |= ADV748X_IO_10_CSI4_EN; 535 adv748x_csi2_set_virtual_channel(&state->txa, 0); 536 } 537 if (is_tx_enabled(&state->txb)) { 538 regval |= ADV748X_IO_10_CSI1_EN; 539 adv748x_csi2_set_virtual_channel(&state->txb, 0); 540 } 541 io_write(state, ADV748X_IO_10, regval); 542 543 /* Use vid_std and v_freq as freerun resolution for CP */ 544 cp_clrset(state, ADV748X_CP_CLMP_POS, ADV748X_CP_CLMP_POS_DIS_AUTO, 545 ADV748X_CP_CLMP_POS_DIS_AUTO); 546 547 return 0; 548 } 549 adv748x_identify_chip(struct adv748x_state * state)550 static int adv748x_identify_chip(struct adv748x_state *state) 551 { 552 int msb, lsb; 553 554 lsb = io_read(state, ADV748X_IO_CHIP_REV_ID_1); 555 msb = io_read(state, ADV748X_IO_CHIP_REV_ID_2); 556 557 if (lsb < 0 || msb < 0) { 558 adv_err(state, "Failed to read chip revision\n"); 559 return -EIO; 560 } 561 562 adv_info(state, "chip found @ 0x%02x revision %02x%02x\n", 563 state->client->addr << 1, lsb, msb); 564 565 return 0; 566 } 567 568 /* ----------------------------------------------------------------------------- 569 * Suspend / Resume 570 */ 571 adv748x_resume_early(struct device * dev)572 static int __maybe_unused adv748x_resume_early(struct device *dev) 573 { 574 struct i2c_client *client = to_i2c_client(dev); 575 struct adv748x_state *state = i2c_get_clientdata(client); 576 577 return adv748x_reset(state); 578 } 579 580 /* ----------------------------------------------------------------------------- 581 * i2c driver 582 */ 583 adv748x_subdev_init(struct v4l2_subdev * sd,struct adv748x_state * state,const struct v4l2_subdev_ops * ops,u32 function,const char * ident)584 void adv748x_subdev_init(struct v4l2_subdev *sd, struct adv748x_state *state, 585 const struct v4l2_subdev_ops *ops, u32 function, 586 const char *ident) 587 { 588 v4l2_subdev_init(sd, ops); 589 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; 590 591 /* the owner is the same as the i2c_client's driver owner */ 592 sd->owner = state->dev->driver->owner; 593 sd->dev = state->dev; 594 595 v4l2_set_subdevdata(sd, state); 596 597 /* initialize name */ 598 snprintf(sd->name, sizeof(sd->name), "%s %d-%04x %s", 599 state->dev->driver->name, 600 i2c_adapter_id(state->client->adapter), 601 state->client->addr, ident); 602 603 sd->entity.function = function; 604 sd->entity.ops = is_tx(adv748x_sd_to_csi2(sd)) ? 605 &adv748x_tx_media_ops : &adv748x_media_ops; 606 } 607 adv748x_parse_csi2_lanes(struct adv748x_state * state,unsigned int port,struct device_node * ep)608 static int adv748x_parse_csi2_lanes(struct adv748x_state *state, 609 unsigned int port, 610 struct device_node *ep) 611 { 612 struct v4l2_fwnode_endpoint vep = { .bus_type = V4L2_MBUS_CSI2_DPHY }; 613 unsigned int num_lanes; 614 int ret; 615 616 if (port != ADV748X_PORT_TXA && port != ADV748X_PORT_TXB) 617 return 0; 618 619 ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &vep); 620 if (ret) 621 return ret; 622 623 num_lanes = vep.bus.mipi_csi2.num_data_lanes; 624 625 if (vep.base.port == ADV748X_PORT_TXA) { 626 if (num_lanes != 1 && num_lanes != 2 && num_lanes != 4) { 627 adv_err(state, "TXA: Invalid number (%u) of lanes\n", 628 num_lanes); 629 return -EINVAL; 630 } 631 632 state->txa.num_lanes = num_lanes; 633 state->txa.active_lanes = num_lanes; 634 adv_dbg(state, "TXA: using %u lanes\n", state->txa.num_lanes); 635 } 636 637 if (vep.base.port == ADV748X_PORT_TXB) { 638 if (num_lanes != 1) { 639 adv_err(state, "TXB: Invalid number (%u) of lanes\n", 640 num_lanes); 641 return -EINVAL; 642 } 643 644 state->txb.num_lanes = num_lanes; 645 state->txb.active_lanes = num_lanes; 646 adv_dbg(state, "TXB: using %u lanes\n", state->txb.num_lanes); 647 } 648 649 return 0; 650 } 651 adv748x_parse_dt(struct adv748x_state * state)652 static int adv748x_parse_dt(struct adv748x_state *state) 653 { 654 struct device_node *ep_np = NULL; 655 struct of_endpoint ep; 656 bool out_found = false; 657 bool in_found = false; 658 int ret; 659 660 for_each_endpoint_of_node(state->dev->of_node, ep_np) { 661 of_graph_parse_endpoint(ep_np, &ep); 662 adv_info(state, "Endpoint %pOF on port %d", ep.local_node, 663 ep.port); 664 665 if (ep.port >= ADV748X_PORT_MAX) { 666 adv_err(state, "Invalid endpoint %pOF on port %d", 667 ep.local_node, ep.port); 668 669 continue; 670 } 671 672 if (state->endpoints[ep.port]) { 673 adv_err(state, 674 "Multiple port endpoints are not supported"); 675 continue; 676 } 677 678 of_node_get(ep_np); 679 state->endpoints[ep.port] = ep_np; 680 681 /* 682 * At least one input endpoint and one output endpoint shall 683 * be defined. 684 */ 685 if (ep.port < ADV748X_PORT_TXA) 686 in_found = true; 687 else 688 out_found = true; 689 690 /* Store number of CSI-2 lanes used for TXA and TXB. */ 691 ret = adv748x_parse_csi2_lanes(state, ep.port, ep_np); 692 if (ret) 693 return ret; 694 } 695 696 return in_found && out_found ? 0 : -ENODEV; 697 } 698 adv748x_dt_cleanup(struct adv748x_state * state)699 static void adv748x_dt_cleanup(struct adv748x_state *state) 700 { 701 unsigned int i; 702 703 for (i = 0; i < ADV748X_PORT_MAX; i++) 704 of_node_put(state->endpoints[i]); 705 } 706 adv748x_probe(struct i2c_client * client)707 static int adv748x_probe(struct i2c_client *client) 708 { 709 struct adv748x_state *state; 710 int ret; 711 712 /* Check if the adapter supports the needed features */ 713 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 714 return -EIO; 715 716 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); 717 if (!state) 718 return -ENOMEM; 719 720 mutex_init(&state->mutex); 721 722 state->dev = &client->dev; 723 state->client = client; 724 state->i2c_clients[ADV748X_PAGE_IO] = client; 725 i2c_set_clientdata(client, state); 726 727 /* 728 * We can not use container_of to get back to the state with two TXs; 729 * Initialize the TXs's fields unconditionally on the endpoint 730 * presence to access them later. 731 */ 732 state->txa.state = state->txb.state = state; 733 state->txa.page = ADV748X_PAGE_TXA; 734 state->txb.page = ADV748X_PAGE_TXB; 735 state->txa.port = ADV748X_PORT_TXA; 736 state->txb.port = ADV748X_PORT_TXB; 737 738 /* Discover and process ports declared by the Device tree endpoints */ 739 ret = adv748x_parse_dt(state); 740 if (ret) { 741 adv_err(state, "Failed to parse device tree"); 742 goto err_free_mutex; 743 } 744 745 /* Configure IO Regmap region */ 746 ret = adv748x_configure_regmap(state, ADV748X_PAGE_IO); 747 if (ret) { 748 adv_err(state, "Error configuring IO regmap region"); 749 goto err_cleanup_dt; 750 } 751 752 ret = adv748x_identify_chip(state); 753 if (ret) { 754 adv_err(state, "Failed to identify chip"); 755 goto err_cleanup_dt; 756 } 757 758 /* Configure remaining pages as I2C clients with regmap access */ 759 ret = adv748x_initialise_clients(state); 760 if (ret) { 761 adv_err(state, "Failed to setup client regmap pages"); 762 goto err_cleanup_clients; 763 } 764 765 /* SW reset ADV748X to its default values */ 766 ret = adv748x_reset(state); 767 if (ret) { 768 adv_err(state, "Failed to reset hardware"); 769 goto err_cleanup_clients; 770 } 771 772 /* Initialise HDMI */ 773 ret = adv748x_hdmi_init(&state->hdmi); 774 if (ret) { 775 adv_err(state, "Failed to probe HDMI"); 776 goto err_cleanup_clients; 777 } 778 779 /* Initialise AFE */ 780 ret = adv748x_afe_init(&state->afe); 781 if (ret) { 782 adv_err(state, "Failed to probe AFE"); 783 goto err_cleanup_hdmi; 784 } 785 786 /* Initialise TXA */ 787 ret = adv748x_csi2_init(state, &state->txa); 788 if (ret) { 789 adv_err(state, "Failed to probe TXA"); 790 goto err_cleanup_afe; 791 } 792 793 /* Initialise TXB */ 794 ret = adv748x_csi2_init(state, &state->txb); 795 if (ret) { 796 adv_err(state, "Failed to probe TXB"); 797 goto err_cleanup_txa; 798 } 799 800 return 0; 801 802 err_cleanup_txa: 803 adv748x_csi2_cleanup(&state->txa); 804 err_cleanup_afe: 805 adv748x_afe_cleanup(&state->afe); 806 err_cleanup_hdmi: 807 adv748x_hdmi_cleanup(&state->hdmi); 808 err_cleanup_clients: 809 adv748x_unregister_clients(state); 810 err_cleanup_dt: 811 adv748x_dt_cleanup(state); 812 err_free_mutex: 813 mutex_destroy(&state->mutex); 814 815 return ret; 816 } 817 adv748x_remove(struct i2c_client * client)818 static void adv748x_remove(struct i2c_client *client) 819 { 820 struct adv748x_state *state = i2c_get_clientdata(client); 821 822 adv748x_afe_cleanup(&state->afe); 823 adv748x_hdmi_cleanup(&state->hdmi); 824 825 adv748x_csi2_cleanup(&state->txa); 826 adv748x_csi2_cleanup(&state->txb); 827 828 adv748x_unregister_clients(state); 829 adv748x_dt_cleanup(state); 830 mutex_destroy(&state->mutex); 831 } 832 833 static const struct of_device_id adv748x_of_table[] = { 834 { .compatible = "adi,adv7481", }, 835 { .compatible = "adi,adv7482", }, 836 { } 837 }; 838 MODULE_DEVICE_TABLE(of, adv748x_of_table); 839 840 static const struct dev_pm_ops adv748x_pm_ops = { 841 SET_LATE_SYSTEM_SLEEP_PM_OPS(NULL, adv748x_resume_early) 842 }; 843 844 static struct i2c_driver adv748x_driver = { 845 .driver = { 846 .name = "adv748x", 847 .of_match_table = adv748x_of_table, 848 .pm = &adv748x_pm_ops, 849 }, 850 .probe = adv748x_probe, 851 .remove = adv748x_remove, 852 }; 853 854 module_i2c_driver(adv748x_driver); 855 856 MODULE_AUTHOR("Kieran Bingham <kieran.bingham@ideasonboard.com>"); 857 MODULE_DESCRIPTION("ADV748X video decoder"); 858 MODULE_LICENSE("GPL"); 859