arch/arm/mach-omap2/display.c

   1 /*
   2  * OMAP2plus display device setup / initialization.
   3  *
   4  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
   5  *      Senthilvadivu Guruswamy
   6  *      Sumit Semwal
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  13  * kind, whether express or implied; without even the implied warranty
  14  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <linux/string.h>
  19 #include <linux/kernel.h>
  20 #include <linux/init.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/io.h>
  23 #include <linux/clk.h>
  24 #include <linux/err.h>
  25 #include <linux/delay.h>
  26
  27 #include <video/omapdss.h>
  28 #include "omap_hwmod.h"
  29 #include "omap_device.h"
  30 #include "omap-pm.h"
  31 #include "common.h"
  32
  33 #include "soc.h"
  34 #include "iomap.h"
  35 #include "mux.h"
  36 #include "control.h"
  37 #include "display.h"
  38 #include "prm.h"
  39
  40 #define DISPC_CONTROL           0x0040
  41 #define DISPC_CONTROL2          0x0238
  42 #define DISPC_CONTROL3          0x0848
  43 #define DISPC_IRQSTATUS         0x0018
  44
  45 #define DSS_SYSCONFIG           0x10
  46 #define DSS_SYSSTATUS           0x14
  47 #define DSS_CONTROL             0x40
  48 #define DSS_SDI_CONTROL         0x44
  49 #define DSS_PLL_CONTROL         0x48
  50
  51 #define LCD_EN_MASK             (0x1 << 0)
  52 #define DIGIT_EN_MASK           (0x1 << 1)
  53
  54 #define FRAMEDONE_IRQ_SHIFT     0
  55 #define EVSYNC_EVEN_IRQ_SHIFT   2
  56 #define EVSYNC_ODD_IRQ_SHIFT    3
  57 #define FRAMEDONE2_IRQ_SHIFT    22
  58 #define FRAMEDONE3_IRQ_SHIFT    30
  59 #define FRAMEDONETV_IRQ_SHIFT   24
  60
  61 /*
  62  * FRAMEDONE_IRQ_TIMEOUT: how long (in milliseconds) to wait during DISPC
  63  *     reset before deciding that something has gone wrong
  64  */
  65 #define FRAMEDONE_IRQ_TIMEOUT           100
  66
  67 static struct platform_device omap_display_device = {
  68         .name          = "omapdss",
  69         .id            = -1,
  70         .dev            = {
  71                 .platform_data = NULL,
  72         },
  73 };
  74
  75 struct omap_dss_hwmod_data {
  76         const char *oh_name;
  77         const char *dev_name;
  78         const int id;
  79 };
  80
  81 static const struct omap_dss_hwmod_data omap2_dss_hwmod_data[] __initconst = {
  82         { "dss_core", "omapdss_dss", -1 },
  83         { "dss_dispc", "omapdss_dispc", -1 },
  84         { "dss_rfbi", "omapdss_rfbi", -1 },
  85         { "dss_venc", "omapdss_venc", -1 },
  86 };
  87
  88 static const struct omap_dss_hwmod_data omap3_dss_hwmod_data[] __initconst = {
  89         { "dss_core", "omapdss_dss", -1 },
  90         { "dss_dispc", "omapdss_dispc", -1 },
  91         { "dss_rfbi", "omapdss_rfbi", -1 },
  92         { "dss_venc", "omapdss_venc", -1 },
  93         { "dss_dsi1", "omapdss_dsi", 0 },
  94 };
  95
  96 static const struct omap_dss_hwmod_data omap4_dss_hwmod_data[] __initconst = {
  97         { "dss_core", "omapdss_dss", -1 },
  98         { "dss_dispc", "omapdss_dispc", -1 },
  99         { "dss_rfbi", "omapdss_rfbi", -1 },
 100         { "dss_dsi1", "omapdss_dsi", 0 },
 101         { "dss_dsi2", "omapdss_dsi", 1 },
 102         { "dss_hdmi", "omapdss_hdmi", -1 },
 103 };
 104
 105 static void __init omap4_hdmi_mux_pads(enum omap_hdmi_flags flags)
 106 {
 107         u32 reg;
 108         u16 control_i2c_1;
 109
 110         omap_mux_init_signal("hdmi_cec",
 111                         OMAP_PIN_INPUT_PULLUP);
 112         omap_mux_init_signal("hdmi_ddc_scl",
 113                         OMAP_PIN_INPUT_PULLUP);
 114         omap_mux_init_signal("hdmi_ddc_sda",
 115                         OMAP_PIN_INPUT_PULLUP);
 116
 117         /*
 118          * CONTROL_I2C_1: HDMI_DDC_SDA_PULLUPRESX (bit 28) and
 119          * HDMI_DDC_SCL_PULLUPRESX (bit 24) are set to disable
 120          * internal pull up resistor.
 121          */
 122         if (flags & OMAP_HDMI_SDA_SCL_EXTERNAL_PULLUP) {
 123                 control_i2c_1 = OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_I2C_1;
 124                 reg = omap4_ctrl_pad_readl(control_i2c_1);
 125                 reg |= (OMAP4_HDMI_DDC_SDA_PULLUPRESX_MASK |
 126                         OMAP4_HDMI_DDC_SCL_PULLUPRESX_MASK);
 127                         omap4_ctrl_pad_writel(reg, control_i2c_1);
 128         }
 129 }
 130
 131 static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes)
 132 {
 133         u32 enable_mask, enable_shift;
 134         u32 pipd_mask, pipd_shift;
 135         u32 reg;
 136
 137         if (dsi_id == 0) {
 138                 enable_mask = OMAP4_DSI1_LANEENABLE_MASK;
 139                 enable_shift = OMAP4_DSI1_LANEENABLE_SHIFT;
 140                 pipd_mask = OMAP4_DSI1_PIPD_MASK;
 141                 pipd_shift = OMAP4_DSI1_PIPD_SHIFT;
 142         } else if (dsi_id == 1) {
 143                 enable_mask = OMAP4_DSI2_LANEENABLE_MASK;
 144                 enable_shift = OMAP4_DSI2_LANEENABLE_SHIFT;
 145                 pipd_mask = OMAP4_DSI2_PIPD_MASK;
 146                 pipd_shift = OMAP4_DSI2_PIPD_SHIFT;
 147         } else {
 148                 return -ENODEV;
 149         }
 150
 151         reg = omap4_ctrl_pad_readl(OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY);
 152
 153         reg &= ~enable_mask;
 154         reg &= ~pipd_mask;
 155
 156         reg |= (lanes << enable_shift) & enable_mask;
 157         reg |= (lanes << pipd_shift) & pipd_mask;
 158
 159         omap4_ctrl_pad_writel(reg, OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY);
 160
 161         return 0;
 162 }
 163
 164 int __init omap_hdmi_init(enum omap_hdmi_flags flags)
 165 {
 166         if (cpu_is_omap44xx())
 167                 omap4_hdmi_mux_pads(flags);
 168
 169         return 0;
 170 }
 171
 172 static int omap_dsi_enable_pads(int dsi_id, unsigned lane_mask)
 173 {
 174         if (cpu_is_omap44xx())
 175                 return omap4_dsi_mux_pads(dsi_id, lane_mask);
 176
 177         return 0;
 178 }
 179
 180 static void omap_dsi_disable_pads(int dsi_id, unsigned lane_mask)
 181 {
 182         if (cpu_is_omap44xx())
 183                 omap4_dsi_mux_pads(dsi_id, 0);
 184 }
 185
 186 static int omap_dss_set_min_bus_tput(struct device *dev, unsigned long tput)
 187 {
 188         return omap_pm_set_min_bus_tput(dev, OCP_INITIATOR_AGENT, tput);
 189 }
 190
 191 static struct platform_device *create_dss_pdev(const char *pdev_name,
 192                 int pdev_id, const char *oh_name, void *pdata, int pdata_len,
 193                 struct platform_device *parent)
 194 {
 195         struct platform_device *pdev;
 196         struct omap_device *od;
 197         struct omap_hwmod *ohs[1];
 198         struct omap_hwmod *oh;
 199         int r;
 200
 201         oh = omap_hwmod_lookup(oh_name);
 202         if (!oh) {
 203                 pr_err("Could not look up %s\n", oh_name);
 204                 r = -ENODEV;
 205                 goto err;
 206         }
 207
 208         pdev = platform_device_alloc(pdev_name, pdev_id);
 209         if (!pdev) {
 210                 pr_err("Could not create pdev for %s\n", pdev_name);
 211                 r = -ENOMEM;
 212                 goto err;
 213         }
 214
 215         if (parent != NULL)
 216                 pdev->dev.parent = &parent->dev;
 217
 218         if (pdev->id != -1)
 219                 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
 220         else
 221                 dev_set_name(&pdev->dev, "%s", pdev->name);
 222
 223         ohs[0] = oh;
 224         od = omap_device_alloc(pdev, ohs, 1, NULL, 0);
 225         if (IS_ERR(od)) {
 226                 pr_err("Could not alloc omap_device for %s\n", pdev_name);
 227                 r = -ENOMEM;
 228                 goto err;
 229         }
 230
 231         r = platform_device_add_data(pdev, pdata, pdata_len);
 232         if (r) {
 233                 pr_err("Could not set pdata for %s\n", pdev_name);
 234                 goto err;
 235         }
 236
 237         r = omap_device_register(pdev);
 238         if (r) {
 239                 pr_err("Could not register omap_device for %s\n", pdev_name);
 240                 goto err;
 241         }
 242
 243         return pdev;
 244
 245 err:
 246         return ERR_PTR(r);
 247 }
 248
 249 static struct platform_device *create_simple_dss_pdev(const char *pdev_name,
 250                 int pdev_id, void *pdata, int pdata_len,
 251                 struct platform_device *parent)
 252 {
 253         struct platform_device *pdev;
 254         int r;
 255
 256         pdev = platform_device_alloc(pdev_name, pdev_id);
 257         if (!pdev) {
 258                 pr_err("Could not create pdev for %s\n", pdev_name);
 259                 r = -ENOMEM;
 260                 goto err;
 261         }
 262
 263         if (parent != NULL)
 264                 pdev->dev.parent = &parent->dev;
 265
 266         if (pdev->id != -1)
 267                 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
 268         else
 269                 dev_set_name(&pdev->dev, "%s", pdev->name);
 270
 271         r = platform_device_add_data(pdev, pdata, pdata_len);
 272         if (r) {
 273                 pr_err("Could not set pdata for %s\n", pdev_name);
 274                 goto err;
 275         }
 276
 277         r = platform_device_add(pdev);
 278         if (r) {
 279                 pr_err("Could not register platform_device for %s\n", pdev_name);
 280                 goto err;
 281         }
 282
 283         return pdev;
 284
 285 err:
 286         return ERR_PTR(r);
 287 }
 288
 289 static enum omapdss_version __init omap_display_get_version(void)
 290 {
 291         if (cpu_is_omap24xx())
 292                 return OMAPDSS_VER_OMAP24xx;
 293         else if (cpu_is_omap3630())
 294                 return OMAPDSS_VER_OMAP3630;
 295         else if (cpu_is_omap34xx()) {
 296                 if (soc_is_am35xx()) {
 297                         return OMAPDSS_VER_AM35xx;
 298                 } else {
 299                         if (omap_rev() < OMAP3430_REV_ES3_0)
 300                                 return OMAPDSS_VER_OMAP34xx_ES1;
 301                         else
 302                                 return OMAPDSS_VER_OMAP34xx_ES3;
 303                 }
 304         } else if (omap_rev() == OMAP4430_REV_ES1_0)
 305                 return OMAPDSS_VER_OMAP4430_ES1;
 306         else if (omap_rev() == OMAP4430_REV_ES2_0 ||
 307                         omap_rev() == OMAP4430_REV_ES2_1 ||
 308                         omap_rev() == OMAP4430_REV_ES2_2)
 309                 return OMAPDSS_VER_OMAP4430_ES2;
 310         else if (cpu_is_omap44xx())
 311                 return OMAPDSS_VER_OMAP4;
 312         else if (soc_is_omap54xx())
 313                 return OMAPDSS_VER_OMAP5;
 314         else
 315                 return OMAPDSS_VER_UNKNOWN;
 316 }
 317
 318 int __init omap_display_init(struct omap_dss_board_info *board_data)
 319 {
 320         int r = 0;
 321         struct platform_device *pdev;
 322         int i, oh_count;
 323         const struct omap_dss_hwmod_data *curr_dss_hwmod;
 324         struct platform_device *dss_pdev;
 325         enum omapdss_version ver;
 326
 327         /* create omapdss device */
 328
 329         ver = omap_display_get_version();
 330
 331         if (ver == OMAPDSS_VER_UNKNOWN) {
 332                 pr_err("DSS not supported on this SoC\n");
 333                 return -ENODEV;
 334         }
 335
 336         board_data->version = ver;
 337         board_data->dsi_enable_pads = omap_dsi_enable_pads;
 338         board_data->dsi_disable_pads = omap_dsi_disable_pads;
 339         board_data->get_context_loss_count = omap_pm_get_dev_context_loss_count;
 340         board_data->set_min_bus_tput = omap_dss_set_min_bus_tput;
 341
 342         omap_display_device.dev.platform_data = board_data;
 343
 344         r = platform_device_register(&omap_display_device);
 345         if (r < 0) {
 346                 pr_err("Unable to register omapdss device\n");
 347                 return r;
 348         }
 349
 350         /* create devices for dss hwmods */
 351
 352         if (cpu_is_omap24xx()) {
 353                 curr_dss_hwmod = omap2_dss_hwmod_data;
 354                 oh_count = ARRAY_SIZE(omap2_dss_hwmod_data);
 355         } else if (cpu_is_omap34xx()) {
 356                 curr_dss_hwmod = omap3_dss_hwmod_data;
 357                 oh_count = ARRAY_SIZE(omap3_dss_hwmod_data);
 358         } else {
 359                 curr_dss_hwmod = omap4_dss_hwmod_data;
 360                 oh_count = ARRAY_SIZE(omap4_dss_hwmod_data);
 361         }
 362
 363         /*
 364          * First create the pdev for dss_core, which is used as a parent device
 365          * by the other dss pdevs. Note: dss_core has to be the first item in
 366          * the hwmod list.
 367          */
 368         dss_pdev = create_dss_pdev(curr_dss_hwmod[0].dev_name,
 369                         curr_dss_hwmod[0].id,
 370                         curr_dss_hwmod[0].oh_name,
 371                         board_data, sizeof(*board_data),
 372                         NULL);
 373
 374         if (IS_ERR(dss_pdev)) {
 375                 pr_err("Could not build omap_device for %s\n",
 376                                 curr_dss_hwmod[0].oh_name);
 377
 378                 return PTR_ERR(dss_pdev);
 379         }
 380
 381         for (i = 1; i < oh_count; i++) {
 382                 pdev = create_dss_pdev(curr_dss_hwmod[i].dev_name,
 383                                 curr_dss_hwmod[i].id,
 384                                 curr_dss_hwmod[i].oh_name,
 385                                 board_data, sizeof(*board_data),
 386                                 dss_pdev);
 387
 388                 if (IS_ERR(pdev)) {
 389                         pr_err("Could not build omap_device for %s\n",
 390                                         curr_dss_hwmod[i].oh_name);
 391
 392                         return PTR_ERR(pdev);
 393                 }
 394         }
 395
 396         /* Create devices for DPI and SDI */
 397
 398         pdev = create_simple_dss_pdev("omapdss_dpi", -1,
 399                         board_data, sizeof(*board_data), dss_pdev);
 400         if (IS_ERR(pdev)) {
 401                 pr_err("Could not build platform_device for omapdss_dpi\n");
 402                 return PTR_ERR(pdev);
 403         }
 404
 405         if (cpu_is_omap34xx()) {
 406                 pdev = create_simple_dss_pdev("omapdss_sdi", -1,
 407                                 board_data, sizeof(*board_data), dss_pdev);
 408                 if (IS_ERR(pdev)) {
 409                         pr_err("Could not build platform_device for omapdss_sdi\n");
 410                         return PTR_ERR(pdev);
 411                 }
 412         }
 413
 414         return 0;
 415 }
 416
 417 static void dispc_disable_outputs(void)
 418 {
 419         u32 v, irq_mask = 0;
 420         bool lcd_en, digit_en, lcd2_en = false, lcd3_en = false;
 421         int i;
 422         struct omap_dss_dispc_dev_attr *da;
 423         struct omap_hwmod *oh;
 424
 425         oh = omap_hwmod_lookup("dss_dispc");
 426         if (!oh) {
 427                 WARN(1, "display: could not disable outputs during reset - could not find dss_dispc hwmod\n");
 428                 return;
 429         }
 430
 431         if (!oh->dev_attr) {
 432                 pr_err("display: could not disable outputs during reset due to missing dev_attr\n");
 433                 return;
 434         }
 435
 436         da = (struct omap_dss_dispc_dev_attr *)oh->dev_attr;
 437
 438         /* store value of LCDENABLE and DIGITENABLE bits */
 439         v = omap_hwmod_read(oh, DISPC_CONTROL);
 440         lcd_en = v & LCD_EN_MASK;
 441         digit_en = v & DIGIT_EN_MASK;
 442
 443         /* store value of LCDENABLE for LCD2 */
 444         if (da->manager_count > 2) {
 445                 v = omap_hwmod_read(oh, DISPC_CONTROL2);
 446                 lcd2_en = v & LCD_EN_MASK;
 447         }
 448
 449         /* store value of LCDENABLE for LCD3 */
 450         if (da->manager_count > 3) {
 451                 v = omap_hwmod_read(oh, DISPC_CONTROL3);
 452                 lcd3_en = v & LCD_EN_MASK;
 453         }
 454
 455         if (!(lcd_en | digit_en | lcd2_en | lcd3_en))
 456                 return; /* no managers currently enabled */
 457
 458         /*
 459          * If any manager was enabled, we need to disable it before
 460          * DSS clocks are disabled or DISPC module is reset
 461          */
 462         if (lcd_en)
 463                 irq_mask |= 1 << FRAMEDONE_IRQ_SHIFT;
 464
 465         if (digit_en) {
 466                 if (da->has_framedonetv_irq) {
 467                         irq_mask |= 1 << FRAMEDONETV_IRQ_SHIFT;
 468                 } else {
 469                         irq_mask |= 1 << EVSYNC_EVEN_IRQ_SHIFT |
 470                                 1 << EVSYNC_ODD_IRQ_SHIFT;
 471                 }
 472         }
 473
 474         if (lcd2_en)
 475                 irq_mask |= 1 << FRAMEDONE2_IRQ_SHIFT;
 476         if (lcd3_en)
 477                 irq_mask |= 1 << FRAMEDONE3_IRQ_SHIFT;
 478
 479         /*
 480          * clear any previous FRAMEDONE, FRAMEDONETV,
 481          * EVSYNC_EVEN/ODD, FRAMEDONE2 or FRAMEDONE3 interrupts
 482          */
 483         omap_hwmod_write(irq_mask, oh, DISPC_IRQSTATUS);
 484
 485         /* disable LCD and TV managers */
 486         v = omap_hwmod_read(oh, DISPC_CONTROL);
 487         v &= ~(LCD_EN_MASK | DIGIT_EN_MASK);
 488         omap_hwmod_write(v, oh, DISPC_CONTROL);
 489
 490         /* disable LCD2 manager */
 491         if (da->manager_count > 2) {
 492                 v = omap_hwmod_read(oh, DISPC_CONTROL2);
 493                 v &= ~LCD_EN_MASK;
 494                 omap_hwmod_write(v, oh, DISPC_CONTROL2);
 495         }
 496
 497         /* disable LCD3 manager */
 498         if (da->manager_count > 3) {
 499                 v = omap_hwmod_read(oh, DISPC_CONTROL3);
 500                 v &= ~LCD_EN_MASK;
 501                 omap_hwmod_write(v, oh, DISPC_CONTROL3);
 502         }
 503
 504         i = 0;
 505         while ((omap_hwmod_read(oh, DISPC_IRQSTATUS) & irq_mask) !=
 506                irq_mask) {
 507                 i++;
 508                 if (i > FRAMEDONE_IRQ_TIMEOUT) {
 509                         pr_err("didn't get FRAMEDONE1/2/3 or TV interrupt\n");
 510                         break;
 511                 }
 512                 mdelay(1);
 513         }
 514 }
 515
 516 int omap_dss_reset(struct omap_hwmod *oh)
 517 {
 518         struct omap_hwmod_opt_clk *oc;
 519         int c = 0;
 520         int i, r;
 521
 522         if (!(oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS)) {
 523                 pr_err("dss_core: hwmod data doesn't contain reset data\n");
 524                 return -EINVAL;
 525         }
 526
 527         for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
 528                 if (oc->_clk)
 529                         clk_prepare_enable(oc->_clk);
 530
 531         dispc_disable_outputs();
 532
 533         /* clear SDI registers */
 534         if (cpu_is_omap3430()) {
 535                 omap_hwmod_write(0x0, oh, DSS_SDI_CONTROL);
 536                 omap_hwmod_write(0x0, oh, DSS_PLL_CONTROL);
 537         }
 538
 539         /*
 540          * clear DSS_CONTROL register to switch DSS clock sources to
 541          * PRCM clock, if any
 542          */
 543         omap_hwmod_write(0x0, oh, DSS_CONTROL);
 544
 545         omap_test_timeout((omap_hwmod_read(oh, oh->class->sysc->syss_offs)
 546                                 & SYSS_RESETDONE_MASK),
 547                         MAX_MODULE_SOFTRESET_WAIT, c);
 548
 549         if (c == MAX_MODULE_SOFTRESET_WAIT)
 550                 pr_warning("dss_core: waiting for reset to finish failed\n");
 551         else
 552                 pr_debug("dss_core: softreset done\n");
 553
 554         for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
 555                 if (oc->_clk)
 556                         clk_disable_unprepare(oc->_clk);
 557
 558         r = (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT : 0;
 559
 560         return r;
 561 }