Rajesh Bharathwaj | dcc7af8 | 2019-12-15 22:42:55 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2020, The Linux Foundation. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 and |
| 6 | * only version 2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | #include <linux/device.h> |
| 16 | #include <linux/i2c.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/platform_device.h> |
| 19 | #include <linux/input.h> |
| 20 | #include <linux/types.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/fs.h> |
| 23 | #include <linux/of.h> |
| 24 | #include <linux/of_graph.h> |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/of_gpio.h> |
| 27 | #include <linux/gpio.h> |
| 28 | #include <linux/delay.h> |
| 29 | #include <linux/regulator/consumer.h> |
| 30 | #include <linux/rwlock.h> |
| 31 | #include <linux/leds.h> |
| 32 | |
| 33 | struct vxr7200 { |
| 34 | struct device *dev; |
| 35 | struct device_node *host_node; |
| 36 | |
| 37 | u8 i2c_addr; |
| 38 | int irq; |
| 39 | u32 vxr_3v3_en; |
| 40 | u32 led_5v_en; |
| 41 | u32 led_drive_en1; |
| 42 | u32 led_drive_en2; |
| 43 | u32 display_1v8_en; |
| 44 | u32 mipi_sw_1v8_en; |
| 45 | u32 display_res1; |
| 46 | u32 selab_gpio; |
| 47 | u32 oenab_gpio; |
| 48 | bool gpioInit; |
| 49 | |
| 50 | struct i2c_client *i2c_client; |
| 51 | |
| 52 | struct regulator *vddio; |
| 53 | struct regulator *lab; |
| 54 | struct regulator *ibb; |
| 55 | |
| 56 | bool power_on; |
| 57 | }; |
| 58 | |
| 59 | static int vxr7200_read(struct vxr7200 *pdata, u8 *reg, u8 *buf, u32 size) |
| 60 | { |
| 61 | struct i2c_client *client = pdata->i2c_client; |
| 62 | struct i2c_msg msg[2] = { |
| 63 | { |
| 64 | .addr = client->addr, |
| 65 | .flags = 0, |
| 66 | .len = 4, |
| 67 | .buf = reg, |
| 68 | }, |
| 69 | { |
| 70 | .addr = client->addr, |
| 71 | .flags = I2C_M_RD, |
| 72 | .len = size, |
| 73 | .buf = buf, |
| 74 | } |
| 75 | }; |
| 76 | |
| 77 | if (i2c_transfer(client->adapter, msg, 2) != 2) { |
| 78 | pr_err("i2c read failed\n"); |
| 79 | return -EIO; |
| 80 | } |
| 81 | |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | static int turnGpio(struct vxr7200 *pdata, int gpio, char *name, bool on) |
| 86 | { |
| 87 | int ret = -1; |
| 88 | |
| 89 | pr_info("%s vxr7200 gpio:%d, name:%s, on:%d\n", __func__, gpio, |
| 90 | name, on); |
| 91 | if (!pdata->gpioInit) { |
| 92 | ret = gpio_request(gpio, name); |
| 93 | if (ret) { |
| 94 | pr_err("vxr7200 %s gpio request failed\n", name); |
| 95 | goto error; |
| 96 | } |
| 97 | } |
| 98 | if (on) { |
| 99 | ret = gpio_direction_output(gpio, 0); |
| 100 | if (ret) { |
| 101 | pr_err("vxr7200 gpio direction failed\n"); |
| 102 | goto error; |
| 103 | } |
| 104 | gpio_set_value(gpio, 1); |
| 105 | pr_debug("%s vxr7200 gpio:%d set to high\n", __func__, gpio); |
| 106 | } else { |
| 107 | ret = gpio_direction_output(gpio, 1); |
| 108 | if (ret) { |
| 109 | pr_err("vxr7200 gpio direction failed\n"); |
| 110 | goto error; |
| 111 | } |
| 112 | gpio_set_value(gpio, 0); |
| 113 | pr_debug("%s vxr7200 gpio:%d set to low\n", __func__, gpio); |
| 114 | } |
| 115 | return 0; |
| 116 | error: |
| 117 | return -EINVAL; |
| 118 | } |
| 119 | |
| 120 | static void vxr7200_set_gpios(struct vxr7200 *pdata, bool turnOn) |
| 121 | { |
| 122 | int rc; |
| 123 | |
| 124 | pr_debug("%s, turnOn:%d\n", __func__, turnOn); |
| 125 | if (pdata) { |
| 126 | rc = turnGpio(pdata, pdata->vxr_3v3_en, "vxr_3v3_en", turnOn); |
| 127 | if (rc) |
| 128 | goto gpio1Fail; |
| 129 | rc = turnGpio(pdata, pdata->led_5v_en, "led_5v_en", turnOn); |
| 130 | if (rc) |
| 131 | goto gpio2Fail; |
| 132 | rc = turnGpio(pdata, pdata->led_drive_en1, |
| 133 | "led_drive_en1", turnOn); |
| 134 | if (rc) |
| 135 | goto gpio3Fail; |
| 136 | rc = turnGpio(pdata, pdata->led_drive_en2, |
| 137 | "led_drive_en2", turnOn); |
| 138 | if (rc) |
| 139 | goto gpio4Fail; |
| 140 | rc = turnGpio(pdata, pdata->display_1v8_en, |
| 141 | "disp_1v8_en", turnOn); |
| 142 | if (rc) |
| 143 | goto gpio5Fail; |
| 144 | pdata->mipi_sw_1v8_en += 1100; |
| 145 | rc = turnGpio(pdata, pdata->mipi_sw_1v8_en, |
| 146 | "mipi_sw1v8_en", turnOn); |
| 147 | if (rc) |
| 148 | goto gpio6Fail; |
| 149 | rc = turnGpio(pdata, pdata->display_res1, |
| 150 | "display_res1", turnOn); |
| 151 | if (rc) |
| 152 | goto gpio7Fail; |
| 153 | } |
| 154 | |
| 155 | gpio7Fail: |
| 156 | gpio_free(pdata->display_res1); |
| 157 | gpio6Fail: |
| 158 | gpio_free(pdata->mipi_sw_1v8_en); |
| 159 | gpio5Fail: |
| 160 | gpio_free(pdata->display_1v8_en); |
| 161 | gpio4Fail: |
| 162 | gpio_free(pdata->led_drive_en2); |
| 163 | gpio3Fail: |
| 164 | gpio_free(pdata->led_drive_en1); |
| 165 | gpio2Fail: |
| 166 | gpio_free(pdata->led_5v_en); |
| 167 | gpio1Fail: |
| 168 | gpio_free(pdata->vxr_3v3_en); |
| 169 | } |
| 170 | |
| 171 | static void vxr7200_free_gpios(struct vxr7200 *pdata) |
| 172 | { |
| 173 | if (pdata) { |
| 174 | gpio_free(pdata->vxr_3v3_en); |
| 175 | gpio_free(pdata->led_5v_en); |
| 176 | gpio_free(pdata->led_drive_en1); |
| 177 | gpio_free(pdata->led_drive_en2); |
| 178 | gpio_free(pdata->display_1v8_en); |
| 179 | gpio_free(pdata->mipi_sw_1v8_en); |
| 180 | gpio_free(pdata->display_res1); |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | |
| 185 | static int vxr7200_parse_dt(struct device *dev, |
| 186 | struct vxr7200 *pdata) |
| 187 | { |
| 188 | struct device_node *np = dev->of_node; |
| 189 | int rc = 0; |
| 190 | |
| 191 | pdata->vxr_3v3_en = |
| 192 | of_get_named_gpio(np, "qcom,vxr_3v3_en", 0); |
| 193 | if (!gpio_is_valid(pdata->vxr_3v3_en)) { |
| 194 | pr_err("vxr_3v3_en gpio not specified\n"); |
| 195 | rc = -EINVAL; |
| 196 | } |
| 197 | |
| 198 | pdata->led_5v_en = |
| 199 | of_get_named_gpio(np, "qcom,led-5v-en-gpio", 0); |
| 200 | if (!gpio_is_valid(pdata->led_5v_en)) { |
| 201 | pr_err("led_5v_en gpio not specified\n"); |
| 202 | rc = -EINVAL; |
| 203 | } |
| 204 | |
| 205 | pdata->led_drive_en1 = |
| 206 | of_get_named_gpio(np, "qcom,led-driver-en1-gpio", 0); |
| 207 | if (!gpio_is_valid(pdata->led_drive_en1)) { |
| 208 | pr_err("led_drive_en1 gpio not specified\n"); |
| 209 | rc = -EINVAL; |
| 210 | } |
| 211 | |
| 212 | pdata->led_drive_en2 = |
| 213 | of_get_named_gpio(np, "qcom,led-driver-en2-gpio", 0); |
| 214 | if (!gpio_is_valid(pdata->led_drive_en2)) { |
| 215 | pr_err("led_drive_en2 gpio not specified\n"); |
| 216 | rc = -EINVAL; |
| 217 | } |
| 218 | |
| 219 | pdata->display_1v8_en = |
| 220 | of_get_named_gpio(np, "qcom,1p8-en-gpio", 0); |
| 221 | if (!gpio_is_valid(pdata->display_1v8_en)) { |
| 222 | pr_err("display_1v8_en gpio not specified\n"); |
| 223 | rc = -EINVAL; |
| 224 | } |
| 225 | |
| 226 | pdata->mipi_sw_1v8_en = |
| 227 | of_get_named_gpio(np, "qcom,switch-power-gpio", 0); |
| 228 | if (!gpio_is_valid(pdata->mipi_sw_1v8_en)) { |
| 229 | pr_err("mipi_sw_1v8_en gpio not specified\n"); |
| 230 | rc = -EINVAL; |
| 231 | } |
| 232 | |
| 233 | pdata->display_res1 = |
| 234 | of_get_named_gpio(np, "qcom,platform-reset-gpio", 0); |
| 235 | if (!gpio_is_valid(pdata->display_res1)) { |
| 236 | pr_err("display_res1 gpio not specified\n"); |
| 237 | rc = -EINVAL; |
| 238 | } |
| 239 | |
| 240 | if (!rc) |
| 241 | vxr7200_set_gpios(pdata, true); |
| 242 | |
| 243 | pdata->selab_gpio = of_get_named_gpio(np, "qcom,selab-gpio", 0); |
| 244 | if (!gpio_is_valid(pdata->selab_gpio)) { |
| 245 | pr_err("selab_gpio gpio not specified\n"); |
| 246 | rc = -EINVAL; |
| 247 | goto gpio_selab_fail; |
| 248 | } else |
| 249 | turnGpio(pdata, pdata->selab_gpio, "selab_gpio", 0); |
| 250 | |
| 251 | pdata->oenab_gpio = of_get_named_gpio(np, "qcom,oenab-gpio", 0); |
| 252 | if (!gpio_is_valid(pdata->oenab_gpio)) { |
| 253 | pr_err("oenab_gpio gpio not specified\n"); |
| 254 | rc = -EINVAL; |
| 255 | goto gpio_oenab_fail; |
| 256 | } else |
| 257 | turnGpio(pdata, pdata->oenab_gpio, "oenab_gpio", 0); |
| 258 | |
| 259 | if (!pdata->gpioInit) |
| 260 | pdata->gpioInit = true; |
| 261 | |
| 262 | return rc; |
| 263 | |
| 264 | gpio_oenab_fail: |
| 265 | gpio_free(pdata->oenab_gpio); |
| 266 | gpio_selab_fail: |
| 267 | gpio_free(pdata->selab_gpio); |
| 268 | vxr7200_free_gpios(pdata); |
| 269 | return rc; |
| 270 | } |
| 271 | |
| 272 | static void vxr7200_display_pwr_enable_vregs(struct vxr7200 *pdata) |
| 273 | { |
| 274 | int rc = 0; |
| 275 | |
| 276 | pdata->vddio = devm_regulator_get(pdata->dev, "pm660_l11"); |
| 277 | rc = PTR_RET(pdata->vddio); |
| 278 | if (rc) { |
| 279 | pr_err("Failed to get pm660_l11 regulator %s\n", __func__); |
| 280 | goto vddio_fail; |
| 281 | } |
| 282 | rc = regulator_set_load(pdata->vddio, 62000); |
| 283 | if (rc < 0) { |
| 284 | pr_err("Load setting failed for vddio %s\n", __func__); |
| 285 | goto vddio_fail; |
| 286 | } |
| 287 | rc = regulator_set_voltage(pdata->vddio, 1800000, 1800000); |
| 288 | if (rc) { |
| 289 | pr_err("Set voltage(vddio) fail, rc=%d %s\n", rc, __func__); |
| 290 | goto vddio_fail; |
| 291 | } |
| 292 | rc = regulator_enable(pdata->vddio); |
| 293 | if (rc) { |
| 294 | pr_err("enable failed for vddio, rc=%d %s\n", rc, __func__); |
| 295 | goto vddio_fail; |
| 296 | } |
| 297 | |
| 298 | pdata->lab = devm_regulator_get(pdata->dev, "lcdb_ldo"); |
| 299 | rc = PTR_RET(pdata->lab); |
| 300 | if (rc) { |
| 301 | pr_err("Failed to get lcdb_ldo_vreg regulator %s\n", __func__); |
| 302 | goto lab_fail; |
| 303 | } |
| 304 | rc = regulator_set_load(pdata->lab, 100000); |
| 305 | if (rc < 0) { |
| 306 | pr_err("Load Setting failed for lab %s\n", __func__); |
| 307 | goto lab_fail; |
| 308 | } |
| 309 | rc = regulator_set_voltage(pdata->lab, 4600000, 6000000); |
| 310 | if (rc) { |
| 311 | pr_err("Set voltage(lab) fail, rc=%d %s\n", rc, __func__); |
| 312 | goto lab_fail; |
| 313 | } |
| 314 | rc = regulator_enable(pdata->lab); |
| 315 | if (rc) { |
| 316 | pr_err("enable failed for lab, rc=%d %s\n", rc, __func__); |
| 317 | goto lab_fail; |
| 318 | } |
| 319 | |
| 320 | pdata->ibb = devm_regulator_get(pdata->dev, "lcdb_ncp"); |
| 321 | rc = PTR_RET(pdata->ibb); |
| 322 | if (rc) { |
| 323 | pr_err("Failed to get lcdb_ncp_vreg regulator %s\n", __func__); |
| 324 | goto ibb_fail; |
| 325 | } |
| 326 | rc = regulator_set_load(pdata->ibb, 100000); |
| 327 | if (rc < 0) { |
| 328 | pr_err("Load Setting failed for ibb %s\n", __func__); |
| 329 | goto ibb_fail; |
| 330 | } |
| 331 | rc = regulator_set_voltage(pdata->ibb, 4600000, 6000000); |
| 332 | if (rc) { |
| 333 | pr_err("Set voltage(ibb) fail, rc=%d %s\n", rc, __func__); |
| 334 | goto ibb_fail; |
| 335 | } |
| 336 | rc = regulator_enable(pdata->ibb); |
| 337 | if (rc) { |
| 338 | pr_err("enable failed for ibb, rc=%d %s\n", rc, __func__); |
| 339 | goto ibb_fail; |
| 340 | } |
| 341 | |
| 342 | return; |
| 343 | |
| 344 | ibb_fail: |
| 345 | devm_regulator_put(pdata->ibb); |
| 346 | (void)regulator_set_load(pdata->ibb, 100); |
| 347 | (void)regulator_set_voltage(pdata->ibb, 0, 6000000); |
| 348 | |
| 349 | lab_fail: |
| 350 | (void)regulator_set_voltage(pdata->lab, 0, 6000000); |
| 351 | (void)regulator_set_load(pdata->lab, 100); |
| 352 | devm_regulator_put(pdata->lab); |
| 353 | |
| 354 | vddio_fail: |
| 355 | (void)regulator_set_load(pdata->vddio, 100); |
| 356 | (void)regulator_set_voltage(pdata->vddio, 0, 1800000); |
| 357 | devm_regulator_put(pdata->vddio); |
| 358 | } |
| 359 | |
| 360 | static __init int vxr7200_probe(struct i2c_client *client, |
| 361 | const struct i2c_device_id *id) |
| 362 | { |
| 363 | int rc; |
| 364 | struct vxr7200 *pdata; |
| 365 | char *cmdline; |
| 366 | u8 reg[4] = {0x00, 0x20, 0x01, 0x60}; |
| 367 | u8 buf[4] = {0x00, 0x0, 0x0, 0x0}; |
| 368 | |
| 369 | if (!client || !client->dev.of_node) { |
| 370 | pr_err("%s invalid input\n", __func__); |
| 371 | return -EINVAL; |
| 372 | } |
| 373 | |
| 374 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { |
| 375 | pr_err("%s device doesn't support I2C\n", __func__); |
| 376 | return -ENODEV; |
| 377 | } |
| 378 | |
| 379 | pdata = devm_kzalloc(&client->dev, |
| 380 | sizeof(struct vxr7200), GFP_KERNEL); |
| 381 | if (!pdata) |
| 382 | return -ENOMEM; |
| 383 | |
| 384 | pdata->gpioInit = false; |
| 385 | |
| 386 | cmdline = strnstr(boot_command_line, "msm_drm.dsi_display0=", |
| 387 | strlen(boot_command_line)); |
| 388 | if (cmdline) { |
| 389 | cmdline = strnstr(boot_command_line, |
| 390 | "msm_drm.dsi_display0=dsi_sim_vid_display", |
| 391 | strlen(boot_command_line)); |
| 392 | if (cmdline) { |
| 393 | pr_debug("%s DSI SIM, going to dp init cmdline:%s\n", |
| 394 | __func__, cmdline); |
| 395 | goto dp_init; |
| 396 | } |
| 397 | } |
| 398 | pr_debug("%s DSI way, cmdline:%s\n", __func__, cmdline); |
| 399 | goto dsi_display; |
| 400 | |
| 401 | dp_init: |
| 402 | rc = vxr7200_parse_dt(&client->dev, pdata); |
| 403 | if (rc) { |
| 404 | pr_err("%s failed to parse device tree\n", __func__); |
| 405 | goto err_dt_parse; |
| 406 | } |
| 407 | pdata->dev = &client->dev; |
| 408 | pdata->i2c_client = client; |
| 409 | |
| 410 | vxr7200_display_pwr_enable_vregs(pdata); |
| 411 | |
| 412 | i2c_set_clientdata(client, pdata); |
| 413 | dev_set_drvdata(&client->dev, pdata); |
| 414 | |
| 415 | //vxr7200_write(pdata, 0x0A, 0x02);//Enable 4-lane DP |
| 416 | vxr7200_read(pdata, reg, buf, 4);//Enable 4-lane DP |
| 417 | |
| 418 | dsi_display: |
| 419 | return rc; |
| 420 | |
| 421 | err_dt_parse: |
| 422 | devm_kfree(&client->dev, pdata); |
| 423 | |
| 424 | return rc; |
| 425 | } |
| 426 | |
| 427 | static int vxr7200_remove(struct i2c_client *client) |
| 428 | { |
| 429 | struct vxr7200 *pdata = i2c_get_clientdata(client); |
| 430 | |
| 431 | if (pdata) |
| 432 | devm_kfree(&client->dev, pdata); |
| 433 | return 0; |
| 434 | } |
| 435 | |
| 436 | |
| 437 | static void vxr7200_shutdown(struct i2c_client *client) |
| 438 | { |
| 439 | dev_info(&(client->dev), "shutdown"); |
| 440 | } |
| 441 | |
| 442 | static int vxr7200_pm_freeze(struct device *dev) |
| 443 | { |
| 444 | struct i2c_client *client = to_i2c_client(dev); |
| 445 | struct vxr7200 *pdata = i2c_get_clientdata(client); |
| 446 | |
| 447 | dev_info(dev, "freeze"); |
| 448 | vxr7200_set_gpios(pdata, false); |
| 449 | return 0; |
| 450 | } |
| 451 | static int vxr7200_pm_restore(struct device *dev) |
| 452 | { |
| 453 | struct i2c_client *client = to_i2c_client(dev); |
| 454 | struct vxr7200 *pdata = i2c_get_clientdata(client); |
| 455 | |
| 456 | dev_info(dev, "restore"); |
| 457 | vxr7200_set_gpios(pdata, true); |
| 458 | return 0; |
| 459 | } |
| 460 | static int vxr7200_pm_suspend(struct device *dev) |
| 461 | { |
| 462 | struct i2c_client *client = to_i2c_client(dev); |
| 463 | struct vxr7200 *pdata = i2c_get_clientdata(client); |
| 464 | |
| 465 | dev_info(dev, "suspend"); |
| 466 | vxr7200_set_gpios(pdata, false); |
| 467 | return 0; |
| 468 | } |
| 469 | |
| 470 | static int vxr7200_pm_resume(struct device *dev) |
| 471 | { |
| 472 | struct i2c_client *client = to_i2c_client(dev); |
| 473 | struct vxr7200 *pdata = i2c_get_clientdata(client); |
| 474 | |
| 475 | dev_info(dev, "resume"); |
| 476 | vxr7200_set_gpios(pdata, true); |
| 477 | return 0; |
| 478 | } |
| 479 | |
| 480 | static const struct dev_pm_ops vxr7200_dev_pm_ops = { |
| 481 | .suspend = vxr7200_pm_suspend, |
| 482 | .resume = vxr7200_pm_resume, |
| 483 | .freeze = vxr7200_pm_freeze, |
| 484 | .restore = vxr7200_pm_restore, |
| 485 | .thaw = vxr7200_pm_restore, |
| 486 | .poweroff = vxr7200_pm_suspend, |
| 487 | }; |
| 488 | |
| 489 | static const struct i2c_device_id vxr7200_id_table[] = { |
| 490 | {"vxr7200", 0}, |
| 491 | {} |
| 492 | }; |
| 493 | |
| 494 | static struct i2c_driver vxr7200_i2c_driver = { |
| 495 | .probe = vxr7200_probe, |
| 496 | .remove = vxr7200_remove, |
| 497 | .shutdown = vxr7200_shutdown, |
| 498 | .driver = { |
| 499 | .name = "vxr7200", |
| 500 | .owner = THIS_MODULE, |
| 501 | .pm = &vxr7200_dev_pm_ops, |
| 502 | }, |
| 503 | .id_table = vxr7200_id_table, |
| 504 | }; |
| 505 | module_i2c_driver(vxr7200_i2c_driver); |
| 506 | MODULE_DEVICE_TABLE(i2c, vxr7200_id_table); |
| 507 | MODULE_DESCRIPTION("VXR7200 DP2DSI Bridge"); |