drivers/video/fbdev/omap2/omapfb/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 #include <video/omapfb_dss.h>
  32
  33 struct panel_drv_data {
  34         struct omap_dss_device dssdev;
  35         struct omap_dss_device *in;
  36
  37         int data_lines;
  38
  39         struct omap_video_timings videomode;
  40
  41         struct spi_device *spi_dev;
  42 };
  43
  44 static const struct omap_video_timings td028ttec1_panel_timings = {
  45         .x_res          = 480,
  46         .y_res          = 640,
  47         .pixelclock     = 22153000,
  48         .hfp            = 24,
  49         .hsw            = 8,
  50         .hbp            = 8,
  51         .vfp            = 4,
  52         .vsw            = 2,
  53         .vbp            = 2,
  54
  55         .vsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  56         .hsync_level    = OMAPDSS_SIG_ACTIVE_LOW,
  57
  58         .data_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
  59         .de_level       = OMAPDSS_SIG_ACTIVE_HIGH,
  60         .sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
  61 };
  62
  63 #define JBT_COMMAND     0x000
  64 #define JBT_DATA        0x100
  65
  66 static int jbt_ret_write_0(struct panel_drv_data *ddata, u8 reg)
  67 {
  68         int rc;
  69         u16 tx_buf = JBT_COMMAND | reg;
  70
  71         rc = spi_write(ddata->spi_dev, (u8 *)&tx_buf,
  72                         1*sizeof(u16));
  73         if (rc != 0)
  74                 dev_err(&ddata->spi_dev->dev,
  75                         "jbt_ret_write_0 spi_write ret %d\n", rc);
  76
  77         return rc;
  78 }
  79
  80 static int jbt_reg_write_1(struct panel_drv_data *ddata, u8 reg, u8 data)
  81 {
  82         int rc;
  83         u16 tx_buf[2];
  84
  85         tx_buf[0] = JBT_COMMAND | reg;
  86         tx_buf[1] = JBT_DATA | data;
  87         rc = spi_write(ddata->spi_dev, (u8 *)tx_buf,
  88                         2*sizeof(u16));
  89         if (rc != 0)
  90                 dev_err(&ddata->spi_dev->dev,
  91                         "jbt_reg_write_1 spi_write ret %d\n", rc);
  92
  93         return rc;
  94 }
  95
  96 static int jbt_reg_write_2(struct panel_drv_data *ddata, u8 reg, u16 data)
  97 {
  98         int rc;
  99         u16 tx_buf[3];
 100
 101         tx_buf[0] = JBT_COMMAND | reg;
 102         tx_buf[1] = JBT_DATA | (data >> 8);
 103         tx_buf[2] = JBT_DATA | (data & 0xff);
 104
 105         rc = spi_write(ddata->spi_dev, (u8 *)tx_buf,
 106                         3*sizeof(u16));
 107
 108         if (rc != 0)
 109                 dev_err(&ddata->spi_dev->dev,
 110                         "jbt_reg_write_2 spi_write ret %d\n", rc);
 111
 112         return rc;
 113 }
 114
 115 enum jbt_register {
 116         JBT_REG_SLEEP_IN                = 0x10,
 117         JBT_REG_SLEEP_OUT               = 0x11,
 118
 119         JBT_REG_DISPLAY_OFF             = 0x28,
 120         JBT_REG_DISPLAY_ON              = 0x29,
 121
 122         JBT_REG_RGB_FORMAT              = 0x3a,
 123         JBT_REG_QUAD_RATE               = 0x3b,
 124
 125         JBT_REG_POWER_ON_OFF            = 0xb0,
 126         JBT_REG_BOOSTER_OP              = 0xb1,
 127         JBT_REG_BOOSTER_MODE            = 0xb2,
 128         JBT_REG_BOOSTER_FREQ            = 0xb3,
 129         JBT_REG_OPAMP_SYSCLK            = 0xb4,
 130         JBT_REG_VSC_VOLTAGE             = 0xb5,
 131         JBT_REG_VCOM_VOLTAGE            = 0xb6,
 132         JBT_REG_EXT_DISPL               = 0xb7,
 133         JBT_REG_OUTPUT_CONTROL          = 0xb8,
 134         JBT_REG_DCCLK_DCEV              = 0xb9,
 135         JBT_REG_DISPLAY_MODE1           = 0xba,
 136         JBT_REG_DISPLAY_MODE2           = 0xbb,
 137         JBT_REG_DISPLAY_MODE            = 0xbc,
 138         JBT_REG_ASW_SLEW                = 0xbd,
 139         JBT_REG_DUMMY_DISPLAY           = 0xbe,
 140         JBT_REG_DRIVE_SYSTEM            = 0xbf,
 141
 142         JBT_REG_SLEEP_OUT_FR_A          = 0xc0,
 143         JBT_REG_SLEEP_OUT_FR_B          = 0xc1,
 144         JBT_REG_SLEEP_OUT_FR_C          = 0xc2,
 145         JBT_REG_SLEEP_IN_LCCNT_D        = 0xc3,
 146         JBT_REG_SLEEP_IN_LCCNT_E        = 0xc4,
 147         JBT_REG_SLEEP_IN_LCCNT_F        = 0xc5,
 148         JBT_REG_SLEEP_IN_LCCNT_G        = 0xc6,
 149
 150         JBT_REG_GAMMA1_FINE_1           = 0xc7,
 151         JBT_REG_GAMMA1_FINE_2           = 0xc8,
 152         JBT_REG_GAMMA1_INCLINATION      = 0xc9,
 153         JBT_REG_GAMMA1_BLUE_OFFSET      = 0xca,
 154
 155         JBT_REG_BLANK_CONTROL           = 0xcf,
 156         JBT_REG_BLANK_TH_TV             = 0xd0,
 157         JBT_REG_CKV_ON_OFF              = 0xd1,
 158         JBT_REG_CKV_1_2                 = 0xd2,
 159         JBT_REG_OEV_TIMING              = 0xd3,
 160         JBT_REG_ASW_TIMING_1            = 0xd4,
 161         JBT_REG_ASW_TIMING_2            = 0xd5,
 162
 163         JBT_REG_HCLOCK_VGA              = 0xec,
 164         JBT_REG_HCLOCK_QVGA             = 0xed,
 165 };
 166
 167 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
 168
 169 static int td028ttec1_panel_connect(struct omap_dss_device *dssdev)
 170 {
 171         struct panel_drv_data *ddata = to_panel_data(dssdev);
 172         struct omap_dss_device *in = ddata->in;
 173         int r;
 174
 175         if (omapdss_device_is_connected(dssdev))
 176                 return 0;
 177
 178         r = in->ops.dpi->connect(in, dssdev);
 179         if (r)
 180                 return r;
 181
 182         return 0;
 183 }
 184
 185 static void td028ttec1_panel_disconnect(struct omap_dss_device *dssdev)
 186 {
 187         struct panel_drv_data *ddata = to_panel_data(dssdev);
 188         struct omap_dss_device *in = ddata->in;
 189
 190         if (!omapdss_device_is_connected(dssdev))
 191                 return;
 192
 193         in->ops.dpi->disconnect(in, dssdev);
 194 }
 195
 196 static int td028ttec1_panel_enable(struct omap_dss_device *dssdev)
 197 {
 198         struct panel_drv_data *ddata = to_panel_data(dssdev);
 199         struct omap_dss_device *in = ddata->in;
 200         int r;
 201
 202         if (!omapdss_device_is_connected(dssdev))
 203                 return -ENODEV;
 204
 205         if (omapdss_device_is_enabled(dssdev))
 206                 return 0;
 207
 208         if (ddata->data_lines)
 209                 in->ops.dpi->set_data_lines(in, ddata->data_lines);
 210         in->ops.dpi->set_timings(in, &ddata->videomode);
 211
 212         r = in->ops.dpi->enable(in);
 213         if (r)
 214                 return r;
 215
 216         dev_dbg(dssdev->dev, "td028ttec1_panel_enable() - state %d\n",
 217                 dssdev->state);
 218
 219         /* three times command zero */
 220         r |= jbt_ret_write_0(ddata, 0x00);
 221         usleep_range(1000, 2000);
 222         r |= jbt_ret_write_0(ddata, 0x00);
 223         usleep_range(1000, 2000);
 224         r |= jbt_ret_write_0(ddata, 0x00);
 225         usleep_range(1000, 2000);
 226
 227         if (r) {
 228                 dev_warn(dssdev->dev, "transfer error\n");
 229                 goto transfer_err;
 230         }
 231
 232         /* deep standby out */
 233         r |= jbt_reg_write_1(ddata, JBT_REG_POWER_ON_OFF, 0x17);
 234
 235         /* RGB I/F on, RAM write off, QVGA through, SIGCON enable */
 236         r |= jbt_reg_write_1(ddata, JBT_REG_DISPLAY_MODE, 0x80);
 237
 238         /* Quad mode off */
 239         r |= jbt_reg_write_1(ddata, JBT_REG_QUAD_RATE, 0x00);
 240
 241         /* AVDD on, XVDD on */
 242         r |= jbt_reg_write_1(ddata, JBT_REG_POWER_ON_OFF, 0x16);
 243
 244         /* Output control */
 245         r |= jbt_reg_write_2(ddata, JBT_REG_OUTPUT_CONTROL, 0xfff9);
 246
 247         /* Sleep mode off */
 248         r |= jbt_ret_write_0(ddata, JBT_REG_SLEEP_OUT);
 249
 250         /* at this point we have like 50% grey */
 251
 252         /* initialize register set */
 253         r |= jbt_reg_write_1(ddata, JBT_REG_DISPLAY_MODE1, 0x01);
 254         r |= jbt_reg_write_1(ddata, JBT_REG_DISPLAY_MODE2, 0x00);
 255         r |= jbt_reg_write_1(ddata, JBT_REG_RGB_FORMAT, 0x60);
 256         r |= jbt_reg_write_1(ddata, JBT_REG_DRIVE_SYSTEM, 0x10);
 257         r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_OP, 0x56);
 258         r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_MODE, 0x33);
 259         r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_FREQ, 0x11);
 260         r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_FREQ, 0x11);
 261         r |= jbt_reg_write_1(ddata, JBT_REG_OPAMP_SYSCLK, 0x02);
 262         r |= jbt_reg_write_1(ddata, JBT_REG_VSC_VOLTAGE, 0x2b);
 263         r |= jbt_reg_write_1(ddata, JBT_REG_VCOM_VOLTAGE, 0x40);
 264         r |= jbt_reg_write_1(ddata, JBT_REG_EXT_DISPL, 0x03);
 265         r |= jbt_reg_write_1(ddata, JBT_REG_DCCLK_DCEV, 0x04);
 266         /*
 267          * default of 0x02 in JBT_REG_ASW_SLEW responsible for 72Hz requirement
 268          * to avoid red / blue flicker
 269          */
 270         r |= jbt_reg_write_1(ddata, JBT_REG_ASW_SLEW, 0x04);
 271         r |= jbt_reg_write_1(ddata, JBT_REG_DUMMY_DISPLAY, 0x00);
 272
 273         r |= jbt_reg_write_1(ddata, JBT_REG_SLEEP_OUT_FR_A, 0x11);
 274         r |= jbt_reg_write_1(ddata, JBT_REG_SLEEP_OUT_FR_B, 0x11);
 275         r |= jbt_reg_write_1(ddata, JBT_REG_SLEEP_OUT_FR_C, 0x11);
 276         r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_D, 0x2040);
 277         r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_E, 0x60c0);
 278         r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_F, 0x1020);
 279         r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_G, 0x60c0);
 280
 281         r |= jbt_reg_write_2(ddata, JBT_REG_GAMMA1_FINE_1, 0x5533);
 282         r |= jbt_reg_write_1(ddata, JBT_REG_GAMMA1_FINE_2, 0x00);
 283         r |= jbt_reg_write_1(ddata, JBT_REG_GAMMA1_INCLINATION, 0x00);
 284         r |= jbt_reg_write_1(ddata, JBT_REG_GAMMA1_BLUE_OFFSET, 0x00);
 285
 286         r |= jbt_reg_write_2(ddata, JBT_REG_HCLOCK_VGA, 0x1f0);
 287         r |= jbt_reg_write_1(ddata, JBT_REG_BLANK_CONTROL, 0x02);
 288         r |= jbt_reg_write_2(ddata, JBT_REG_BLANK_TH_TV, 0x0804);
 289
 290         r |= jbt_reg_write_1(ddata, JBT_REG_CKV_ON_OFF, 0x01);
 291         r |= jbt_reg_write_2(ddata, JBT_REG_CKV_1_2, 0x0000);
 292
 293         r |= jbt_reg_write_2(ddata, JBT_REG_OEV_TIMING, 0x0d0e);
 294         r |= jbt_reg_write_2(ddata, JBT_REG_ASW_TIMING_1, 0x11a4);
 295         r |= jbt_reg_write_1(ddata, JBT_REG_ASW_TIMING_2, 0x0e);
 296
 297         r |= jbt_ret_write_0(ddata, JBT_REG_DISPLAY_ON);
 298
 299         dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
 300
 301 transfer_err:
 302
 303         return r ? -EIO : 0;
 304 }
 305
 306 static void td028ttec1_panel_disable(struct omap_dss_device *dssdev)
 307 {
 308         struct panel_drv_data *ddata = to_panel_data(dssdev);
 309         struct omap_dss_device *in = ddata->in;
 310
 311         if (!omapdss_device_is_enabled(dssdev))
 312                 return;
 313
 314         dev_dbg(dssdev->dev, "td028ttec1_panel_disable()\n");
 315
 316         jbt_ret_write_0(ddata, JBT_REG_DISPLAY_OFF);
 317         jbt_reg_write_2(ddata, JBT_REG_OUTPUT_CONTROL, 0x8002);
 318         jbt_ret_write_0(ddata, JBT_REG_SLEEP_IN);
 319         jbt_reg_write_1(ddata, JBT_REG_POWER_ON_OFF, 0x00);
 320
 321         in->ops.dpi->disable(in);
 322
 323         dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
 324 }
 325
 326 static void td028ttec1_panel_set_timings(struct omap_dss_device *dssdev,
 327                 struct omap_video_timings *timings)
 328 {
 329         struct panel_drv_data *ddata = to_panel_data(dssdev);
 330         struct omap_dss_device *in = ddata->in;
 331
 332         ddata->videomode = *timings;
 333         dssdev->panel.timings = *timings;
 334
 335         in->ops.dpi->set_timings(in, timings);
 336 }
 337
 338 static void td028ttec1_panel_get_timings(struct omap_dss_device *dssdev,
 339                 struct omap_video_timings *timings)
 340 {
 341         struct panel_drv_data *ddata = to_panel_data(dssdev);
 342
 343         *timings = ddata->videomode;
 344 }
 345
 346 static int td028ttec1_panel_check_timings(struct omap_dss_device *dssdev,
 347                 struct omap_video_timings *timings)
 348 {
 349         struct panel_drv_data *ddata = to_panel_data(dssdev);
 350         struct omap_dss_device *in = ddata->in;
 351
 352         return in->ops.dpi->check_timings(in, timings);
 353 }
 354
 355 static struct omap_dss_driver td028ttec1_ops = {
 356         .connect        = td028ttec1_panel_connect,
 357         .disconnect     = td028ttec1_panel_disconnect,
 358
 359         .enable         = td028ttec1_panel_enable,
 360         .disable        = td028ttec1_panel_disable,
 361
 362         .set_timings    = td028ttec1_panel_set_timings,
 363         .get_timings    = td028ttec1_panel_get_timings,
 364         .check_timings  = td028ttec1_panel_check_timings,
 365 };
 366
 367 static int td028ttec1_probe_of(struct spi_device *spi)
 368 {
 369         struct device_node *node = spi->dev.of_node;
 370         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 371         struct omap_dss_device *in;
 372
 373         in = omapdss_of_find_source_for_first_ep(node);
 374         if (IS_ERR(in)) {
 375                 dev_err(&spi->dev, "failed to find video source\n");
 376                 return PTR_ERR(in);
 377         }
 378
 379         ddata->in = in;
 380
 381         return 0;
 382 }
 383
 384 static int td028ttec1_panel_probe(struct spi_device *spi)
 385 {
 386         struct panel_drv_data *ddata;
 387         struct omap_dss_device *dssdev;
 388         int r;
 389
 390         dev_dbg(&spi->dev, "%s\n", __func__);
 391
 392         if (!spi->dev.of_node)
 393                 return -ENODEV;
 394
 395         spi->bits_per_word = 9;
 396         spi->mode = SPI_MODE_3;
 397
 398         r = spi_setup(spi);
 399         if (r < 0) {
 400                 dev_err(&spi->dev, "spi_setup failed: %d\n", r);
 401                 return r;
 402         }
 403
 404         ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
 405         if (ddata == NULL)
 406                 return -ENOMEM;
 407
 408         dev_set_drvdata(&spi->dev, ddata);
 409
 410         ddata->spi_dev = spi;
 411
 412         r = td028ttec1_probe_of(spi);
 413         if (r)
 414                 return r;
 415
 416         ddata->videomode = td028ttec1_panel_timings;
 417
 418         dssdev = &ddata->dssdev;
 419         dssdev->dev = &spi->dev;
 420         dssdev->driver = &td028ttec1_ops;
 421         dssdev->type = OMAP_DISPLAY_TYPE_DPI;
 422         dssdev->owner = THIS_MODULE;
 423         dssdev->panel.timings = ddata->videomode;
 424         dssdev->phy.dpi.data_lines = ddata->data_lines;
 425
 426         r = omapdss_register_display(dssdev);
 427         if (r) {
 428                 dev_err(&spi->dev, "Failed to register panel\n");
 429                 goto err_reg;
 430         }
 431
 432         return 0;
 433
 434 err_reg:
 435         omap_dss_put_device(ddata->in);
 436         return r;
 437 }
 438
 439 static int td028ttec1_panel_remove(struct spi_device *spi)
 440 {
 441         struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
 442         struct omap_dss_device *dssdev = &ddata->dssdev;
 443         struct omap_dss_device *in = ddata->in;
 444
 445         dev_dbg(&ddata->spi_dev->dev, "%s\n", __func__);
 446
 447         omapdss_unregister_display(dssdev);
 448
 449         td028ttec1_panel_disable(dssdev);
 450         td028ttec1_panel_disconnect(dssdev);
 451
 452         omap_dss_put_device(in);
 453
 454         return 0;
 455 }
 456
 457 static const struct of_device_id td028ttec1_of_match[] = {
 458         { .compatible = "omapdss,tpo,td028ttec1", },
 459         /* keep to not break older DTB */
 460         { .compatible = "omapdss,toppoly,td028ttec1", },
 461         {},
 462 };
 463
 464 MODULE_DEVICE_TABLE(of, td028ttec1_of_match);
 465
 466 static struct spi_driver td028ttec1_spi_driver = {
 467         .probe          = td028ttec1_panel_probe,
 468         .remove         = td028ttec1_panel_remove,
 469
 470         .driver         = {
 471                 .name   = "panel-tpo-td028ttec1",
 472                 .of_match_table = td028ttec1_of_match,
 473                 .suppress_bind_attrs = true,
 474         },
 475 };
 476
 477 module_spi_driver(td028ttec1_spi_driver);
 478
 479 MODULE_ALIAS("spi:tpo,td028ttec1");
 480 MODULE_ALIAS("spi:toppoly,td028ttec1");
 481 MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>");
 482 MODULE_DESCRIPTION("Toppoly TD028TTEC1 panel driver");
 483 MODULE_LICENSE("GPL");