drivers/gpu/drm/omapdrm/displays/panel-tpo-td028ttec1.c

   1 /*
   2  * Toppoly TD028TTEC1 panel support
   3  *
   4  * Copyright (C) 2008 Nokia Corporation
   5  * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
   6  *
   7  * Neo 1973 code (jbt6k74.c):
   8  * Copyright (C) 2006-2007 by OpenMoko, Inc.
   9  * Author: Harald Welte <laforge@openmoko.org>
  10  *
  11  * Ported and adapted from Neo 1973 U-Boot by:
  12  * H. Nikolaus Schaller <hns@goldelico.com>
  13  *
  14  * This program is free software; you can redistribute it and/or modify it
  15  * under the terms of the GNU General Public License version 2 as published by
  16  * the Free Software Foundation.
  17  *
  18  * This program is distributed in the hope that it will be useful, but WITHOUT
  19  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  20  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  21  * more details.
  22  *
  23  * You should have received a copy of the GNU General Public License along with
  24  * this program.  If not, see <http://www.gnu.org/licenses/>.
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/delay.h>
  29 #include <linux/spi/spi.h>
  30 #include <linux/gpio.h>
  31
  32 #include "../dss/omapdss.h"
  33
  34 struct panel_drv_data {
  35         struct omap_dss_device dssdev;
  36         struct omap_dss_device *in;
  37
  38         int data_lines;
  39
  40         struct omap_video_timings videomode;
  41
  42         struct spi_device *spi_dev;
  43 };
  44
  45 static struct omap_video_timings td028ttec1_panel_timings = {
  46         .hactive        = 480,
  47         .y_res          = 640,
  48         .pixelclock     = 22153000,
  49         .hfp            = 24,
  50         .hsw            = 8,
  51         .hbp            = 8,
  52         .vfp            = 4,
  53         .vsw            = 2,
  54         .vbp            = 2,
  55
  56         .vsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  57         .hsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  58
  59         .data_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
  60         .de_level       = OMAPDSS_SIG_ACTIVE_HIGH,
  61         .sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
  62 };
  63
  64 #define JBT_COMMAND     0x000
  65 #define JBT_DATA        0x100
  66
  67 static int jbt_ret_write_0(struct panel_drv_data *ddata, u8 reg)
  68 {
  69         int rc;
  70         u16 tx_buf = JBT_COMMAND | reg;
  71
  72         rc = spi_write(ddata->spi_dev, (u8 *)&tx_buf,
  73                         1*sizeof(u16));
  74         if (rc != 0)
  75                 dev_err(&ddata->spi_dev->dev,
  76                         "jbt_ret_write_0 spi_write ret %d\n", rc);
  77
  78         return rc;
  79 }
  80
  81 static int jbt_reg_write_1(struct panel_drv_data *ddata, u8 reg, u8 data)
  82 {
  83         int rc;
  84         u16 tx_buf[2];
  85
  86         tx_buf[0] = JBT_COMMAND | reg;
  87         tx_buf[1] = JBT_DATA | data;
  88         rc = spi_write(ddata->spi_dev, (u8 *)tx_buf,
  89                         2*sizeof(u16));
  90         if (rc != 0)
  91                 dev_err(&ddata->spi_dev->dev,
  92                         "jbt_reg_write_1 spi_write ret %d\n", rc);
  93
  94         return rc;
  95 }
  96
  97 static int jbt_reg_write_2(struct panel_drv_data *ddata, u8 reg, u16 data)
  98 {
  99         int rc;
 100         u16 tx_buf[3];
 101
 102         tx_buf[0] = JBT_COMMAND | reg;
 103         tx_buf[1] = JBT_DATA | (data >> 8);
 104         tx_buf[2] = JBT_DATA | (data & 0xff);
 105
 106         rc = spi_write(ddata->spi_dev, (u8 *)tx_buf,
 107                         3*sizeof(u16));
 108
 109         if (rc != 0)
 110                 dev_err(&ddata->spi_dev->dev,
 111                         "jbt_reg_write_2 spi_write ret %d\n", rc);
 112
 113         return rc;
 114 }
 115
 116 enum jbt_register {
 117         JBT_REG_SLEEP_IN                = 0x10,
 118         JBT_REG_SLEEP_OUT               = 0x11,
 119
 120         JBT_REG_DISPLAY_OFF             = 0x28,
 121         JBT_REG_DISPLAY_ON              = 0x29,
 122
 123         JBT_REG_RGB_FORMAT              = 0x3a,
 124         JBT_REG_QUAD_RATE               = 0x3b,
 125
 126         JBT_REG_POWER_ON_OFF            = 0xb0,
 127         JBT_REG_BOOSTER_OP              = 0xb1,
 128         JBT_REG_BOOSTER_MODE            = 0xb2,
 129         JBT_REG_BOOSTER_FREQ            = 0xb3,
 130         JBT_REG_OPAMP_SYSCLK            = 0xb4,
 131         JBT_REG_VSC_VOLTAGE             = 0xb5,
 132         JBT_REG_VCOM_VOLTAGE            = 0xb6,
 133         JBT_REG_EXT_DISPL               = 0xb7,
 134         JBT_REG_OUTPUT_CONTROL          = 0xb8,
 135         JBT_REG_DCCLK_DCEV              = 0xb9,
 136         JBT_REG_DISPLAY_MODE1           = 0xba,
 137         JBT_REG_DISPLAY_MODE2           = 0xbb,
 138         JBT_REG_DISPLAY_MODE            = 0xbc,
 139         JBT_REG_ASW_SLEW                = 0xbd,
 140         JBT_REG_DUMMY_DISPLAY           = 0xbe,
 141         JBT_REG_DRIVE_SYSTEM            = 0xbf,
 142
 143         JBT_REG_SLEEP_OUT_FR_A          = 0xc0,
 144         JBT_REG_SLEEP_OUT_FR_B          = 0xc1,
 145         JBT_REG_SLEEP_OUT_FR_C          = 0xc2,
 146         JBT_REG_SLEEP_IN_LCCNT_D        = 0xc3,
 147         JBT_REG_SLEEP_IN_LCCNT_E        = 0xc4,
 148         JBT_REG_SLEEP_IN_LCCNT_F        = 0xc5,
 149         JBT_REG_SLEEP_IN_LCCNT_G        = 0xc6,
 150
 151         JBT_REG_GAMMA1_FINE_1           = 0xc7,
 152         JBT_REG_GAMMA1_FINE_2           = 0xc8,
 153         JBT_REG_GAMMA1_INCLINATION      = 0xc9,
 154         JBT_REG_GAMMA1_BLUE_OFFSET      = 0xca,
 155
 156         JBT_REG_BLANK_CONTROL           = 0xcf,
 157         JBT_REG_BLANK_TH_TV             = 0xd0,
 158         JBT_REG_CKV_ON_OFF              = 0xd1,
 159         JBT_REG_CKV_1_2                 = 0xd2,
 160         JBT_REG_OEV_TIMING              = 0xd3,
 161         JBT_REG_ASW_TIMING_1            = 0xd4,
 162         JBT_REG_ASW_TIMING_2            = 0xd5,
 163
 164         JBT_REG_HCLOCK_VGA              = 0xec,
 165         JBT_REG_HCLOCK_QVGA             = 0xed,
 166 };
 167
 168 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
 169
 170 static int td028ttec1_panel_connect(struct omap_dss_device *dssdev)
 171 {
 172         struct panel_drv_data *ddata = to_panel_data(dssdev);
 173         struct omap_dss_device *in = ddata->in;
 174         int r;
 175
 176         if (omapdss_device_is_connected(dssdev))
 177                 return 0;
 178
 179         r = in->ops.dpi->connect(in, dssdev);
 180         if (r)
 181                 return r;
 182
 183         return 0;
 184 }
 185
 186 static void td028ttec1_panel_disconnect(struct omap_dss_device *dssdev)
 187 {
 188         struct panel_drv_data *ddata = to_panel_data(dssdev);
 189         struct omap_dss_device *in = ddata->in;
 190
 191         if (!omapdss_device_is_connected(dssdev))
 192                 return;
 193
 194         in->ops.dpi->disconnect(in, dssdev);
 195 }
 196
 197 static int td028ttec1_panel_enable(struct omap_dss_device *dssdev)
 198 {
 199         struct panel_drv_data *ddata = to_panel_data(dssdev);
 200         struct omap_dss_device *in = ddata->in;
 201         int r;
 202
 203         if (!omapdss_device_is_connected(dssdev))
 204                 return -ENODEV;
 205
 206         if (omapdss_device_is_enabled(dssdev))
 207                 return 0;
 208
 209         if (ddata->data_lines)
 210                 in->ops.dpi->set_data_lines(in, ddata->data_lines);
 211         in->ops.dpi->set_timings(in, &ddata->videomode);
 212
 213         r = in->ops.dpi->enable(in);
 214         if (r)
 215                 return r;
 216
 217         dev_dbg(dssdev->dev, "td028ttec1_panel_enable() - state %d\n",
 218                 dssdev->state);
 219
 220         /* three times command zero */
 221         r |= jbt_ret_write_0(ddata, 0x00);
 222         usleep_range(1000, 2000);
 223         r |= jbt_ret_write_0(ddata, 0x00);
 224         usleep_range(1000, 2000);
 225         r |= jbt_ret_write_0(ddata, 0x00);
 226         usleep_range(1000, 2000);
 227
 228         if (r) {
 229                 dev_warn(dssdev->dev, "transfer error\n");
 230                 goto transfer_err;
 231         }
 232
 233         /* deep standby out */
 234         r |= jbt_reg_write_1(ddata, JBT_REG_POWER_ON_OFF, 0x17);
 235
 236         /* RGB I/F on, RAM write off, QVGA through, SIGCON enable */
 237         r |= jbt_reg_write_1(ddata, JBT_REG_DISPLAY_MODE, 0x80);
 238
 239         /* Quad mode off */
 240         r |= jbt_reg_write_1(ddata, JBT_REG_QUAD_RATE, 0x00);
 241
 242         /* AVDD on, XVDD on */
 243         r |= jbt_reg_write_1(ddata, JBT_REG_POWER_ON_OFF, 0x16);
 244
 245         /* Output control */
 246         r |= jbt_reg_write_2(ddata, JBT_REG_OUTPUT_CONTROL, 0xfff9);
 247
 248         /* Sleep mode off */
 249         r |= jbt_ret_write_0(ddata, JBT_REG_SLEEP_OUT);
 250
 251         /* at this point we have like 50% grey */
 252
 253         /* initialize register set */
 254         r |= jbt_reg_write_1(ddata, JBT_REG_DISPLAY_MODE1, 0x01);
 255         r |= jbt_reg_write_1(ddata, JBT_REG_DISPLAY_MODE2, 0x00);
 256         r |= jbt_reg_write_1(ddata, JBT_REG_RGB_FORMAT, 0x60);
 257         r |= jbt_reg_write_1(ddata, JBT_REG_DRIVE_SYSTEM, 0x10);
 258         r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_OP, 0x56);
 259         r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_MODE, 0x33);
 260         r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_FREQ, 0x11);
 261         r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_FREQ, 0x11);
 262         r |= jbt_reg_write_1(ddata, JBT_REG_OPAMP_SYSCLK, 0x02);
 263         r |= jbt_reg_write_1(ddata, JBT_REG_VSC_VOLTAGE, 0x2b);
 264         r |= jbt_reg_write_1(ddata, JBT_REG_VCOM_VOLTAGE, 0x40);
 265         r |= jbt_reg_write_1(ddata, JBT_REG_EXT_DISPL, 0x03);
 266         r |= jbt_reg_write_1(ddata, JBT_REG_DCCLK_DCEV, 0x04);
 267         /*
 268          * default of 0x02 in JBT_REG_ASW_SLEW responsible for 72Hz requirement
 269          * to avoid red / blue flicker
 270          */
 271         r |= jbt_reg_write_1(ddata, JBT_REG_ASW_SLEW, 0x04);
 272         r |= jbt_reg_write_1(ddata, JBT_REG_DUMMY_DISPLAY, 0x00);
 273
 274         r |= jbt_reg_write_1(ddata, JBT_REG_SLEEP_OUT_FR_A, 0x11);
 275         r |= jbt_reg_write_1(ddata, JBT_REG_SLEEP_OUT_FR_B, 0x11);
 276         r |= jbt_reg_write_1(ddata, JBT_REG_SLEEP_OUT_FR_C, 0x11);
 277         r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_D, 0x2040);
 278         r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_E, 0x60c0);
 279         r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_F, 0x1020);
 280         r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_G, 0x60c0);
 281
 282         r |= jbt_reg_write_2(ddata, JBT_REG_GAMMA1_FINE_1, 0x5533);
 283         r |= jbt_reg_write_1(ddata, JBT_REG_GAMMA1_FINE_2, 0x00);
 284         r |= jbt_reg_write_1(ddata, JBT_REG_GAMMA1_INCLINATION, 0x00);
 285         r |= jbt_reg_write_1(ddata, JBT_REG_GAMMA1_BLUE_OFFSET, 0x00);
 286
 287         r |= jbt_reg_write_2(ddata, JBT_REG_HCLOCK_VGA, 0x1f0);
 288         r |= jbt_reg_write_1(ddata, JBT_REG_BLANK_CONTROL, 0x02);
 289         r |= jbt_reg_write_2(ddata, JBT_REG_BLANK_TH_TV, 0x0804);
 290
 291         r |= jbt_reg_write_1(ddata, JBT_REG_CKV_ON_OFF, 0x01);
 292         r |= jbt_reg_write_2(ddata, JBT_REG_CKV_1_2, 0x0000);
 293
 294         r |= jbt_reg_write_2(ddata, JBT_REG_OEV_TIMING, 0x0d0e);
 295         r |= jbt_reg_write_2(ddata, JBT_REG_ASW_TIMING_1, 0x11a4);
 296         r |= jbt_reg_write_1(ddata, JBT_REG_ASW_TIMING_2, 0x0e);
 297
 298         r |= jbt_ret_write_0(ddata, JBT_REG_DISPLAY_ON);
 299
 300         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 301
 302 transfer_err:
 303
 304         return r ? -EIO : 0;
 305 }
 306
 307 static void td028ttec1_panel_disable(struct omap_dss_device *dssdev)
 308 {
 309         struct panel_drv_data *ddata = to_panel_data(dssdev);
 310         struct omap_dss_device *in = ddata->in;
 311
 312         if (!omapdss_device_is_enabled(dssdev))
 313                 return;
 314
 315         dev_dbg(dssdev->dev, "td028ttec1_panel_disable()\n");
 316
 317         jbt_ret_write_0(ddata, JBT_REG_DISPLAY_OFF);
 318         jbt_reg_write_2(ddata, JBT_REG_OUTPUT_CONTROL, 0x8002);
 319         jbt_ret_write_0(ddata, JBT_REG_SLEEP_IN);
 320         jbt_reg_write_1(ddata, JBT_REG_POWER_ON_OFF, 0x00);
 321
 322         in->ops.dpi->disable(in);
 323
 324         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 325 }
 326
 327 static void td028ttec1_panel_set_timings(struct omap_dss_device *dssdev,
 328                 struct omap_video_timings *timings)
 329 {
 330         struct panel_drv_data *ddata = to_panel_data(dssdev);
 331         struct omap_dss_device *in = ddata->in;
 332
 333         ddata->videomode = *timings;
 334         dssdev->panel.timings = *timings;
 335
 336         in->ops.dpi->set_timings(in, timings);
 337 }
 338
 339 static void td028ttec1_panel_get_timings(struct omap_dss_device *dssdev,
 340                 struct omap_video_timings *timings)
 341 {
 342         struct panel_drv_data *ddata = to_panel_data(dssdev);
 343
 344         *timings = ddata->videomode;
 345 }
 346
 347 static int td028ttec1_panel_check_timings(struct omap_dss_device *dssdev,
 348                 struct omap_video_timings *timings)
 349 {
 350         struct panel_drv_data *ddata = to_panel_data(dssdev);
 351         struct omap_dss_device *in = ddata->in;
 352
 353         return in->ops.dpi->check_timings(in, timings);
 354 }
 355
 356 static struct omap_dss_driver td028ttec1_ops = {
 357         .connect        = td028ttec1_panel_connect,
 358         .disconnect     = td028ttec1_panel_disconnect,
 359
 360         .enable         = td028ttec1_panel_enable,
 361         .disable        = td028ttec1_panel_disable,
 362
 363         .set_timings    = td028ttec1_panel_set_timings,
 364         .get_timings    = td028ttec1_panel_get_timings,
 365         .check_timings  = td028ttec1_panel_check_timings,
 366 };
 367
 368 static int td028ttec1_probe_of(struct spi_device *spi)
 369 {
 370         struct device_node *node = spi->dev.of_node;
 371         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 372         struct omap_dss_device *in;
 373
 374         in = omapdss_of_find_source_for_first_ep(node);
 375         if (IS_ERR(in)) {
 376                 dev_err(&spi->dev, "failed to find video source\n");
 377                 return PTR_ERR(in);
 378         }
 379
 380         ddata->in = in;
 381
 382         return 0;
 383 }
 384
 385 static int td028ttec1_panel_probe(struct spi_device *spi)
 386 {
 387         struct panel_drv_data *ddata;
 388         struct omap_dss_device *dssdev;
 389         int r;
 390
 391         dev_dbg(&spi->dev, "%s\n", __func__);
 392
 393         spi->bits_per_word = 9;
 394         spi->mode = SPI_MODE_3;
 395
 396         r = spi_setup(spi);
 397         if (r < 0) {
 398                 dev_err(&spi->dev, "spi_setup failed: %d\n", r);
 399                 return r;
 400         }
 401
 402         ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
 403         if (ddata == NULL)
 404                 return -ENOMEM;
 405
 406         dev_set_drvdata(&spi->dev, ddata);
 407
 408         ddata->spi_dev = spi;
 409
 410         if (!spi->dev.of_node)
 411                 return -ENODEV;
 412
 413         r = td028ttec1_probe_of(spi);
 414         if (r)
 415                 return r;
 416
 417         ddata->videomode = td028ttec1_panel_timings;
 418
 419         dssdev = &ddata->dssdev;
 420         dssdev->dev = &spi->dev;
 421         dssdev->driver = &td028ttec1_ops;
 422         dssdev->type = OMAP_DISPLAY_TYPE_DPI;
 423         dssdev->owner = THIS_MODULE;
 424         dssdev->panel.timings = ddata->videomode;
 425         dssdev->phy.dpi.data_lines = ddata->data_lines;
 426
 427         r = omapdss_register_display(dssdev);
 428         if (r) {
 429                 dev_err(&spi->dev, "Failed to register panel\n");
 430                 goto err_reg;
 431         }
 432
 433         return 0;
 434
 435 err_reg:
 436         omap_dss_put_device(ddata->in);
 437         return r;
 438 }
 439
 440 static int td028ttec1_panel_remove(struct spi_device *spi)
 441 {
 442         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 443         struct omap_dss_device *dssdev = &ddata->dssdev;
 444         struct omap_dss_device *in = ddata->in;
 445
 446         dev_dbg(&ddata->spi_dev->dev, "%s\n", __func__);
 447
 448         omapdss_unregister_display(dssdev);
 449
 450         td028ttec1_panel_disable(dssdev);
 451         td028ttec1_panel_disconnect(dssdev);
 452
 453         omap_dss_put_device(in);
 454
 455         return 0;
 456 }
 457
 458 static const struct of_device_id td028ttec1_of_match[] = {
 459         { .compatible = "omapdss,toppoly,td028ttec1", },
 460         {},
 461 };
 462
 463 MODULE_DEVICE_TABLE(of, td028ttec1_of_match);
 464
 465 static struct spi_driver td028ttec1_spi_driver = {
 466         .probe          = td028ttec1_panel_probe,
 467         .remove         = td028ttec1_panel_remove,
 468
 469         .driver         = {
 470                 .name   = "panel-tpo-td028ttec1",
 471                 .of_match_table = td028ttec1_of_match,
 472                 .suppress_bind_attrs = true,
 473         },
 474 };
 475
 476 module_spi_driver(td028ttec1_spi_driver);
 477
 478 MODULE_ALIAS("spi:toppoly,td028ttec1");
 479 MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>");
 480 MODULE_DESCRIPTION("Toppoly TD028TTEC1 panel driver");
 481 MODULE_LICENSE("GPL");