Pileus Git - ~andy/linux/blob - drivers/video/omap2/displays/panel-picodlp.c

   1 /*
   2  * picodlp panel driver
   3  * picodlp_i2c_driver: i2c_client driver
   4  *
   5  * Copyright (C) 2009-2011 Texas Instruments
   6  * Author: Mythri P K <mythripk@ti.com>
   7  * Mayuresh Janorkar <mayur@ti.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License version 2 as published by
  11  * the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but WITHOUT
  14  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  16  * more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along with
  19  * this program.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/input.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/firmware.h>
  27 #include <linux/slab.h>
  28 #include <linux/mutex.h>
  29 #include <linux/i2c.h>
  30 #include <linux/delay.h>
  31 #include <linux/gpio.h>
  32
  33 #include <video/omapdss.h>
  34 #include <video/omap-panel-picodlp.h>
  35
  36 #include "panel-picodlp.h"
  37
  38 struct picodlp_data {
  39         struct mutex lock;
  40         struct i2c_client *picodlp_i2c_client;
  41 };
  42
  43 static struct i2c_board_info picodlp_i2c_board_info = {
  44         I2C_BOARD_INFO("picodlp_i2c_driver", 0x1b),
  45 };
  46
  47 struct picodlp_i2c_data {
  48         struct mutex xfer_lock;
  49 };
  50
  51 static struct i2c_device_id picodlp_i2c_id[] = {
  52         { "picodlp_i2c_driver", 0 },
  53         { }
  54 };
  55
  56 struct picodlp_i2c_command {
  57         u8 reg;
  58         u32 value;
  59 };
  60
  61 static struct omap_video_timings pico_ls_timings = {
  62         .x_res          = 864,
  63         .y_res          = 480,
  64         .hsw            = 7,
  65         .hfp            = 11,
  66         .hbp            = 7,
  67
  68         .pixel_clock    = 19200,
  69
  70         .vsw            = 2,
  71         .vfp            = 3,
  72         .vbp            = 14,
  73
  74         .vsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  75         .hsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  76         .data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
  77         .de_level       = OMAPDSS_SIG_ACTIVE_HIGH,
  78         .sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
  79 };
  80
  81 static inline struct picodlp_panel_data
  82                 *get_panel_data(const struct omap_dss_device *dssdev)
  83 {
  84         return (struct picodlp_panel_data *) dssdev->data;
  85 }
  86
  87 static u32 picodlp_i2c_read(struct i2c_client *client, u8 reg)
  88 {
  89         u8 read_cmd[] = {READ_REG_SELECT, reg}, data[4];
  90         struct picodlp_i2c_data *picodlp_i2c_data = i2c_get_clientdata(client);
  91         struct i2c_msg msg[2];
  92
  93         mutex_lock(&picodlp_i2c_data->xfer_lock);
  94
  95         msg[0].addr = client->addr;
  96         msg[0].flags = 0;
  97         msg[0].len = 2;
  98         msg[0].buf = read_cmd;
  99
 100         msg[1].addr = client->addr;
 101         msg[1].flags = I2C_M_RD;
 102         msg[1].len = 4;
 103         msg[1].buf = data;
 104
 105         i2c_transfer(client->adapter, msg, 2);
 106         mutex_unlock(&picodlp_i2c_data->xfer_lock);
 107         return (data[3] | (data[2] << 8) | (data[1] << 16) | (data[0] << 24));
 108 }
 109
 110 static int picodlp_i2c_write_block(struct i2c_client *client,
 111                                         u8 *data, int len)
 112 {
 113         struct i2c_msg msg;
 114         int i, r, msg_count = 1;
 115
 116         struct picodlp_i2c_data *picodlp_i2c_data = i2c_get_clientdata(client);
 117
 118         if (len < 1 || len > 32) {
 119                 dev_err(&client->dev,
 120                         "too long syn_write_block len %d\n", len);
 121                 return -EIO;
 122         }
 123         mutex_lock(&picodlp_i2c_data->xfer_lock);
 124
 125         msg.addr = client->addr;
 126         msg.flags = 0;
 127         msg.len = len;
 128         msg.buf = data;
 129         r = i2c_transfer(client->adapter, &msg, msg_count);
 130         mutex_unlock(&picodlp_i2c_data->xfer_lock);
 131
 132         /*
 133          * i2c_transfer returns:
 134          * number of messages sent in case of success
 135          * a negative error number in case of failure
 136          */
 137         if (r != msg_count)
 138                 goto err;
 139
 140         /* In case of success */
 141         for (i = 0; i < len; i++)
 142                 dev_dbg(&client->dev,
 143                         "addr %x bw 0x%02x[%d]: 0x%02x\n",
 144                         client->addr, data[0] + i, i, data[i]);
 145
 146         return 0;
 147 err:
 148         dev_err(&client->dev, "picodlp_i2c_write error\n");
 149         return r;
 150 }
 151
 152 static int picodlp_i2c_write(struct i2c_client *client, u8 reg, u32 value)
 153 {
 154         u8 data[5];
 155         int i;
 156
 157         data[0] = reg;
 158         for (i = 1; i < 5; i++)
 159                 data[i] = (value >> (32 - (i) * 8)) & 0xFF;
 160
 161         return picodlp_i2c_write_block(client, data, 5);
 162 }
 163
 164 static int picodlp_i2c_write_array(struct i2c_client *client,
 165                         const struct picodlp_i2c_command commands[],
 166                         int count)
 167 {
 168         int i, r = 0;
 169         for (i = 0; i < count; i++) {
 170                 r = picodlp_i2c_write(client, commands[i].reg,
 171                                                 commands[i].value);
 172                 if (r)
 173                         return r;
 174         }
 175         return r;
 176 }
 177
 178 static int picodlp_wait_for_dma_done(struct i2c_client *client)
 179 {
 180         u8 trial = 100;
 181
 182         do {
 183                 msleep(1);
 184                 if (!trial--)
 185                         return -ETIMEDOUT;
 186         } while (picodlp_i2c_read(client, MAIN_STATUS) & DMA_STATUS);
 187
 188         return 0;
 189 }
 190
 191 /**
 192  * picodlp_i2c_init:    i2c_initialization routine
 193  * client:      i2c_client for communication
 194  *
 195  * return
 196  *              0       : Success, no error
 197  *      error code      : Failure
 198  */
 199 static int picodlp_i2c_init(struct i2c_client *client)
 200 {
 201         int r;
 202         static const struct picodlp_i2c_command init_cmd_set1[] = {
 203                 {SOFT_RESET, 1},
 204                 {DMD_PARK_TRIGGER, 1},
 205                 {MISC_REG, 5},
 206                 {SEQ_CONTROL, 0},
 207                 {SEQ_VECTOR, 0x100},
 208                 {DMD_BLOCK_COUNT, 7},
 209                 {DMD_VCC_CONTROL, 0x109},
 210                 {DMD_PARK_PULSE_COUNT, 0xA},
 211                 {DMD_PARK_PULSE_WIDTH, 0xB},
 212                 {DMD_PARK_DELAY, 0x2ED},
 213                 {DMD_SHADOW_ENABLE, 0},
 214                 {FLASH_OPCODE, 0xB},
 215                 {FLASH_DUMMY_BYTES, 1},
 216                 {FLASH_ADDR_BYTES, 3},
 217                 {PBC_CONTROL, 0},
 218                 {FLASH_START_ADDR, CMT_LUT_0_START_ADDR},
 219                 {FLASH_READ_BYTES, CMT_LUT_0_SIZE},
 220                 {CMT_SPLASH_LUT_START_ADDR, 0},
 221                 {CMT_SPLASH_LUT_DEST_SELECT, CMT_LUT_ALL},
 222                 {PBC_CONTROL, 1},
 223         };
 224
 225         static const struct picodlp_i2c_command init_cmd_set2[] = {
 226                 {PBC_CONTROL, 0},
 227                 {CMT_SPLASH_LUT_DEST_SELECT, 0},
 228                 {PBC_CONTROL, 0},
 229                 {FLASH_START_ADDR, SEQUENCE_0_START_ADDR},
 230                 {FLASH_READ_BYTES, SEQUENCE_0_SIZE},
 231                 {SEQ_RESET_LUT_START_ADDR, 0},
 232                 {SEQ_RESET_LUT_DEST_SELECT, SEQ_SEQ_LUT},
 233                 {PBC_CONTROL, 1},
 234         };
 235
 236         static const struct picodlp_i2c_command init_cmd_set3[] = {
 237                 {PBC_CONTROL, 0},
 238                 {SEQ_RESET_LUT_DEST_SELECT, 0},
 239                 {PBC_CONTROL, 0},
 240                 {FLASH_START_ADDR, DRC_TABLE_0_START_ADDR},
 241                 {FLASH_READ_BYTES, DRC_TABLE_0_SIZE},
 242                 {SEQ_RESET_LUT_START_ADDR, 0},
 243                 {SEQ_RESET_LUT_DEST_SELECT, SEQ_DRC_LUT_ALL},
 244                 {PBC_CONTROL, 1},
 245         };
 246
 247         static const struct picodlp_i2c_command init_cmd_set4[] = {
 248                 {PBC_CONTROL, 0},
 249                 {SEQ_RESET_LUT_DEST_SELECT, 0},
 250                 {SDC_ENABLE, 1},
 251                 {AGC_CTRL, 7},
 252                 {CCA_C1A, 0x100},
 253                 {CCA_C1B, 0x0},
 254                 {CCA_C1C, 0x0},
 255                 {CCA_C2A, 0x0},
 256                 {CCA_C2B, 0x100},
 257                 {CCA_C2C, 0x0},
 258                 {CCA_C3A, 0x0},
 259                 {CCA_C3B, 0x0},
 260                 {CCA_C3C, 0x100},
 261                 {CCA_C7A, 0x100},
 262                 {CCA_C7B, 0x100},
 263                 {CCA_C7C, 0x100},
 264                 {CCA_ENABLE, 1},
 265                 {CPU_IF_MODE, 1},
 266                 {SHORT_FLIP, 1},
 267                 {CURTAIN_CONTROL, 0},
 268                 {DMD_PARK_TRIGGER, 0},
 269                 {R_DRIVE_CURRENT, 0x298},
 270                 {G_DRIVE_CURRENT, 0x298},
 271                 {B_DRIVE_CURRENT, 0x298},
 272                 {RGB_DRIVER_ENABLE, 7},
 273                 {SEQ_CONTROL, 0},
 274                 {ACTGEN_CONTROL, 0x10},
 275                 {SEQUENCE_MODE, SEQ_LOCK},
 276                 {DATA_FORMAT, RGB888},
 277                 {INPUT_RESOLUTION, WVGA_864_LANDSCAPE},
 278                 {INPUT_SOURCE, PARALLEL_RGB},
 279                 {CPU_IF_SYNC_METHOD, 1},
 280                 {SEQ_CONTROL, 1}
 281         };
 282
 283         r = picodlp_i2c_write_array(client, init_cmd_set1,
 284                                                 ARRAY_SIZE(init_cmd_set1));
 285         if (r)
 286                 return r;
 287
 288         r = picodlp_wait_for_dma_done(client);
 289         if (r)
 290                 return r;
 291
 292         r = picodlp_i2c_write_array(client, init_cmd_set2,
 293                                         ARRAY_SIZE(init_cmd_set2));
 294         if (r)
 295                 return r;
 296
 297         r = picodlp_wait_for_dma_done(client);
 298         if (r)
 299                 return r;
 300
 301         r = picodlp_i2c_write_array(client, init_cmd_set3,
 302                                         ARRAY_SIZE(init_cmd_set3));
 303         if (r)
 304                 return r;
 305
 306         r = picodlp_wait_for_dma_done(client);
 307         if (r)
 308                 return r;
 309
 310         r = picodlp_i2c_write_array(client, init_cmd_set4,
 311                                         ARRAY_SIZE(init_cmd_set4));
 312         if (r)
 313                 return r;
 314
 315         return 0;
 316 }
 317
 318 static int picodlp_i2c_probe(struct i2c_client *client,
 319                 const struct i2c_device_id *id)
 320 {
 321         struct picodlp_i2c_data *picodlp_i2c_data;
 322
 323         picodlp_i2c_data = kzalloc(sizeof(struct picodlp_i2c_data), GFP_KERNEL);
 324
 325         if (!picodlp_i2c_data)
 326                 return -ENOMEM;
 327
 328         mutex_init(&picodlp_i2c_data->xfer_lock);
 329         i2c_set_clientdata(client, picodlp_i2c_data);
 330
 331         return 0;
 332 }
 333
 334 static int picodlp_i2c_remove(struct i2c_client *client)
 335 {
 336         struct picodlp_i2c_data *picodlp_i2c_data =
 337                                         i2c_get_clientdata(client);
 338         kfree(picodlp_i2c_data);
 339         return 0;
 340 }
 341
 342 static struct i2c_driver picodlp_i2c_driver = {
 343         .driver = {
 344                 .name   = "picodlp_i2c_driver",
 345         },
 346         .probe          = picodlp_i2c_probe,
 347         .remove         = picodlp_i2c_remove,
 348         .id_table       = picodlp_i2c_id,
 349 };
 350
 351 static int picodlp_panel_power_on(struct omap_dss_device *dssdev)
 352 {
 353         int r, trial = 100;
 354         struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
 355         struct picodlp_panel_data *picodlp_pdata = get_panel_data(dssdev);
 356
 357         if (dssdev->platform_enable) {
 358                 r = dssdev->platform_enable(dssdev);
 359                 if (r)
 360                         return r;
 361         }
 362
 363         gpio_set_value(picodlp_pdata->pwrgood_gpio, 0);
 364         msleep(1);
 365         gpio_set_value(picodlp_pdata->pwrgood_gpio, 1);
 366
 367         while (!gpio_get_value(picodlp_pdata->emu_done_gpio)) {
 368                 if (!trial--) {
 369                         dev_err(&dssdev->dev, "emu_done signal not"
 370                                                 " going high\n");
 371                         return -ETIMEDOUT;
 372                 }
 373                 msleep(5);
 374         }
 375         /*
 376          * As per dpp2600 programming guide,
 377          * it is required to sleep for 1000ms after emu_done signal goes high
 378          * then only i2c commands can be successfully sent to dpp2600
 379          */
 380         msleep(1000);
 381
 382         omapdss_dpi_set_timings(dssdev, &dssdev->panel.timings);
 383         omapdss_dpi_set_data_lines(dssdev, dssdev->phy.dpi.data_lines);
 384
 385         r = omapdss_dpi_display_enable(dssdev);
 386         if (r) {
 387                 dev_err(&dssdev->dev, "failed to enable DPI\n");
 388                 goto err1;
 389         }
 390
 391         r = picodlp_i2c_init(picod->picodlp_i2c_client);
 392         if (r)
 393                 goto err;
 394
 395         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 396
 397         return r;
 398 err:
 399         omapdss_dpi_display_disable(dssdev);
 400 err1:
 401         if (dssdev->platform_disable)
 402                 dssdev->platform_disable(dssdev);
 403
 404         return r;
 405 }
 406
 407 static void picodlp_panel_power_off(struct omap_dss_device *dssdev)
 408 {
 409         struct picodlp_panel_data *picodlp_pdata = get_panel_data(dssdev);
 410
 411         omapdss_dpi_display_disable(dssdev);
 412
 413         gpio_set_value(picodlp_pdata->emu_done_gpio, 0);
 414         gpio_set_value(picodlp_pdata->pwrgood_gpio, 0);
 415
 416         if (dssdev->platform_disable)
 417                 dssdev->platform_disable(dssdev);
 418 }
 419
 420 static int picodlp_panel_probe(struct omap_dss_device *dssdev)
 421 {
 422         struct picodlp_data *picod;
 423         struct picodlp_panel_data *picodlp_pdata = get_panel_data(dssdev);
 424         struct i2c_adapter *adapter;
 425         struct i2c_client *picodlp_i2c_client;
 426         int r = 0, picodlp_adapter_id;
 427
 428         dssdev->panel.timings = pico_ls_timings;
 429
 430         picod =  kzalloc(sizeof(struct picodlp_data), GFP_KERNEL);
 431         if (!picod)
 432                 return -ENOMEM;
 433
 434         mutex_init(&picod->lock);
 435
 436         picodlp_adapter_id = picodlp_pdata->picodlp_adapter_id;
 437
 438         adapter = i2c_get_adapter(picodlp_adapter_id);
 439         if (!adapter) {
 440                 dev_err(&dssdev->dev, "can't get i2c adapter\n");
 441                 r = -ENODEV;
 442                 goto err;
 443         }
 444
 445         picodlp_i2c_client = i2c_new_device(adapter, &picodlp_i2c_board_info);
 446         if (!picodlp_i2c_client) {
 447                 dev_err(&dssdev->dev, "can't add i2c device::"
 448                                          " picodlp_i2c_client is NULL\n");
 449                 r = -ENODEV;
 450                 goto err;
 451         }
 452
 453         picod->picodlp_i2c_client = picodlp_i2c_client;
 454
 455         dev_set_drvdata(&dssdev->dev, picod);
 456         return r;
 457 err:
 458         kfree(picod);
 459         return r;
 460 }
 461
 462 static void picodlp_panel_remove(struct omap_dss_device *dssdev)
 463 {
 464         struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
 465
 466         i2c_unregister_device(picod->picodlp_i2c_client);
 467         dev_set_drvdata(&dssdev->dev, NULL);
 468         dev_dbg(&dssdev->dev, "removing picodlp panel\n");
 469
 470         kfree(picod);
 471 }
 472
 473 static int picodlp_panel_enable(struct omap_dss_device *dssdev)
 474 {
 475         struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
 476         int r;
 477
 478         dev_dbg(&dssdev->dev, "enabling picodlp panel\n");
 479
 480         mutex_lock(&picod->lock);
 481         if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
 482                 mutex_unlock(&picod->lock);
 483                 return -EINVAL;
 484         }
 485
 486         r = picodlp_panel_power_on(dssdev);
 487         mutex_unlock(&picod->lock);
 488
 489         return r;
 490 }
 491
 492 static void picodlp_panel_disable(struct omap_dss_device *dssdev)
 493 {
 494         struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
 495
 496         mutex_lock(&picod->lock);
 497         /* Turn off DLP Power */
 498         if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
 499                 picodlp_panel_power_off(dssdev);
 500
 501         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 502         mutex_unlock(&picod->lock);
 503
 504         dev_dbg(&dssdev->dev, "disabling picodlp panel\n");
 505 }
 506
 507 static void picodlp_get_resolution(struct omap_dss_device *dssdev,
 508                                         u16 *xres, u16 *yres)
 509 {
 510         *xres = dssdev->panel.timings.x_res;
 511         *yres = dssdev->panel.timings.y_res;
 512 }
 513
 514 static struct omap_dss_driver picodlp_driver = {
 515         .probe          = picodlp_panel_probe,
 516         .remove         = picodlp_panel_remove,
 517
 518         .enable         = picodlp_panel_enable,
 519         .disable        = picodlp_panel_disable,
 520
 521         .get_resolution = picodlp_get_resolution,
 522
 523         .driver         = {
 524                 .name   = "picodlp_panel",
 525                 .owner  = THIS_MODULE,
 526         },
 527 };
 528
 529 static int __init picodlp_init(void)
 530 {
 531         int r = 0;
 532
 533         r = i2c_add_driver(&picodlp_i2c_driver);
 534         if (r) {
 535                 printk(KERN_WARNING "picodlp_i2c_driver" \
 536                         " registration failed\n");
 537                 return r;
 538         }
 539
 540         r = omap_dss_register_driver(&picodlp_driver);
 541         if (r)
 542                 i2c_del_driver(&picodlp_i2c_driver);
 543
 544         return r;
 545 }
 546
 547 static void __exit picodlp_exit(void)
 548 {
 549         i2c_del_driver(&picodlp_i2c_driver);
 550         omap_dss_unregister_driver(&picodlp_driver);
 551 }
 552
 553 module_init(picodlp_init);
 554 module_exit(picodlp_exit);
 555
 556 MODULE_AUTHOR("Mythri P K <mythripk@ti.com>");
 557 MODULE_DESCRIPTION("picodlp driver");
 558 MODULE_LICENSE("GPL");