drivers/video/fbdev/bfin-lq035q1-fb.c

   1 /*
   2  * Blackfin LCD Framebuffer driver SHARP LQ035Q1DH02
   3  *
   4  * Copyright 2008-2009 Analog Devices Inc.
   5  * Licensed under the GPL-2 or later.
   6  */
   7
   8 #define DRIVER_NAME "bfin-lq035q1"
   9 #define pr_fmt(fmt) DRIVER_NAME ": " fmt
  10
  11 #include <linux/module.h>
  12 #include <linux/kernel.h>
  13 #include <linux/errno.h>
  14 #include <linux/string.h>
  15 #include <linux/fb.h>
  16 #include <linux/gpio.h>
  17 #include <linux/slab.h>
  18 #include <linux/init.h>
  19 #include <linux/types.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/device.h>
  22 #include <linux/backlight.h>
  23 #include <linux/lcd.h>
  24 #include <linux/dma-mapping.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/spi/spi.h>
  27
  28 #include <asm/blackfin.h>
  29 #include <asm/irq.h>
  30 #include <asm/dma.h>
  31 #include <asm/portmux.h>
  32 #include <asm/gptimers.h>
  33
  34 #include <asm/bfin-lq035q1.h>
  35
  36 #if defined(BF533_FAMILY) || defined(BF538_FAMILY)
  37 #define TIMER_HSYNC_id                  TIMER1_id
  38 #define TIMER_HSYNCbit                  TIMER1bit
  39 #define TIMER_HSYNC_STATUS_TRUN         TIMER_STATUS_TRUN1
  40 #define TIMER_HSYNC_STATUS_TIMIL        TIMER_STATUS_TIMIL1
  41 #define TIMER_HSYNC_STATUS_TOVF         TIMER_STATUS_TOVF1
  42
  43 #define TIMER_VSYNC_id                  TIMER2_id
  44 #define TIMER_VSYNCbit                  TIMER2bit
  45 #define TIMER_VSYNC_STATUS_TRUN         TIMER_STATUS_TRUN2
  46 #define TIMER_VSYNC_STATUS_TIMIL        TIMER_STATUS_TIMIL2
  47 #define TIMER_VSYNC_STATUS_TOVF         TIMER_STATUS_TOVF2
  48 #else
  49 #define TIMER_HSYNC_id                  TIMER0_id
  50 #define TIMER_HSYNCbit                  TIMER0bit
  51 #define TIMER_HSYNC_STATUS_TRUN         TIMER_STATUS_TRUN0
  52 #define TIMER_HSYNC_STATUS_TIMIL        TIMER_STATUS_TIMIL0
  53 #define TIMER_HSYNC_STATUS_TOVF         TIMER_STATUS_TOVF0
  54
  55 #define TIMER_VSYNC_id                  TIMER1_id
  56 #define TIMER_VSYNCbit                  TIMER1bit
  57 #define TIMER_VSYNC_STATUS_TRUN         TIMER_STATUS_TRUN1
  58 #define TIMER_VSYNC_STATUS_TIMIL        TIMER_STATUS_TIMIL1
  59 #define TIMER_VSYNC_STATUS_TOVF         TIMER_STATUS_TOVF1
  60 #endif
  61
  62 #define LCD_X_RES               320     /* Horizontal Resolution */
  63 #define LCD_Y_RES               240     /* Vertical Resolution */
  64 #define DMA_BUS_SIZE            16
  65 #define U_LINE                  4       /* Blanking Lines */
  66
  67
  68 /* Interface 16/18-bit TFT over an 8-bit wide PPI using a small Programmable Logic Device (CPLD)
  69  * http://blackfin.uclinux.org/gf/project/stamp/frs/?action=FrsReleaseBrowse&frs_package_id=165
  70  */
  71
  72
  73 #define BFIN_LCD_NBR_PALETTE_ENTRIES    256
  74
  75 #define PPI_TX_MODE                     0x2
  76 #define PPI_XFER_TYPE_11                0xC
  77 #define PPI_PORT_CFG_01                 0x10
  78 #define PPI_POLS_1                      0x8000
  79
  80 #define LQ035_INDEX                     0x74
  81 #define LQ035_DATA                      0x76
  82
  83 #define LQ035_DRIVER_OUTPUT_CTL         0x1
  84 #define LQ035_SHUT_CTL                  0x11
  85
  86 #define LQ035_DRIVER_OUTPUT_MASK        (LQ035_LR | LQ035_TB | LQ035_BGR | LQ035_REV)
  87 #define LQ035_DRIVER_OUTPUT_DEFAULT     (0x2AEF & ~LQ035_DRIVER_OUTPUT_MASK)
  88
  89 #define LQ035_SHUT                      (1 << 0)        /* Shutdown */
  90 #define LQ035_ON                        (0 << 0)        /* Shutdown */
  91
  92 struct bfin_lq035q1fb_info {
  93         struct fb_info *fb;
  94         struct device *dev;
  95         struct spi_driver spidrv;
  96         struct bfin_lq035q1fb_disp_info *disp_info;
  97         unsigned char *fb_buffer;       /* RGB Buffer */
  98         dma_addr_t dma_handle;
  99         int lq035_open_cnt;
 100         int irq;
 101         spinlock_t lock;        /* lock */
 102         u32 pseudo_pal[16];
 103
 104         u32 lcd_bpp;
 105         u32 h_actpix;
 106         u32 h_period;
 107         u32 h_pulse;
 108         u32 h_start;
 109         u32 v_lines;
 110         u32 v_pulse;
 111         u32 v_period;
 112 };
 113
 114 static int nocursor;
 115 module_param(nocursor, int, 0644);
 116 MODULE_PARM_DESC(nocursor, "cursor enable/disable");
 117
 118 struct spi_control {
 119         unsigned short mode;
 120 };
 121
 122 static int lq035q1_control(struct spi_device *spi, unsigned char reg, unsigned short value)
 123 {
 124         int ret;
 125         u8 regs[3] = { LQ035_INDEX, 0, 0 };
 126         u8 dat[3] = { LQ035_DATA, 0, 0 };
 127
 128         if (!spi)
 129                 return -ENODEV;
 130
 131         regs[2] = reg;
 132         dat[1] = value >> 8;
 133         dat[2] = value & 0xFF;
 134
 135         ret = spi_write(spi, regs, ARRAY_SIZE(regs));
 136         ret |= spi_write(spi, dat, ARRAY_SIZE(dat));
 137         return ret;
 138 }
 139
 140 static int lq035q1_spidev_probe(struct spi_device *spi)
 141 {
 142         int ret;
 143         struct spi_control *ctl;
 144         struct bfin_lq035q1fb_info *info = container_of(spi->dev.driver,
 145                                                 struct bfin_lq035q1fb_info,
 146                                                 spidrv.driver);
 147
 148         ctl = kzalloc(sizeof(*ctl), GFP_KERNEL);
 149
 150         if (!ctl)
 151                 return -ENOMEM;
 152
 153         ctl->mode = (info->disp_info->mode &
 154                 LQ035_DRIVER_OUTPUT_MASK) | LQ035_DRIVER_OUTPUT_DEFAULT;
 155
 156         ret = lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_ON);
 157         ret |= lq035q1_control(spi, LQ035_DRIVER_OUTPUT_CTL, ctl->mode);
 158         if (ret) {
 159                 kfree(ctl);
 160                 return ret;
 161         }
 162
 163         spi_set_drvdata(spi, ctl);
 164
 165         return 0;
 166 }
 167
 168 static int lq035q1_spidev_remove(struct spi_device *spi)
 169 {
 170         return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
 171 }
 172
 173 #ifdef CONFIG_PM_SLEEP
 174 static int lq035q1_spidev_suspend(struct device *dev)
 175 {
 176         struct spi_device *spi = to_spi_device(dev);
 177
 178         return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
 179 }
 180
 181 static int lq035q1_spidev_resume(struct device *dev)
 182 {
 183         struct spi_device *spi = to_spi_device(dev);
 184         struct spi_control *ctl = spi_get_drvdata(spi);
 185         int ret;
 186
 187         ret = lq035q1_control(spi, LQ035_DRIVER_OUTPUT_CTL, ctl->mode);
 188         if (ret)
 189                 return ret;
 190
 191         return lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_ON);
 192 }
 193
 194 static SIMPLE_DEV_PM_OPS(lq035q1_spidev_pm_ops, lq035q1_spidev_suspend,
 195         lq035q1_spidev_resume);
 196 #define LQ035Q1_SPIDEV_PM_OPS (&lq035q1_spidev_pm_ops)
 197
 198 #else
 199 #define LQ035Q1_SPIDEV_PM_OPS NULL
 200 #endif
 201
 202 /* Power down all displays on reboot, poweroff or halt */
 203 static void lq035q1_spidev_shutdown(struct spi_device *spi)
 204 {
 205         lq035q1_control(spi, LQ035_SHUT_CTL, LQ035_SHUT);
 206 }
 207
 208 static int lq035q1_backlight(struct bfin_lq035q1fb_info *info, unsigned arg)
 209 {
 210         if (info->disp_info->use_bl)
 211                 gpio_set_value(info->disp_info->gpio_bl, arg);
 212
 213         return 0;
 214 }
 215
 216 static int bfin_lq035q1_calc_timing(struct bfin_lq035q1fb_info *fbi)
 217 {
 218         unsigned long clocks_per_pix, cpld_pipeline_delay_cor;
 219
 220         /*
 221          * Interface 16/18-bit TFT over an 8-bit wide PPI using a small
 222          * Programmable Logic Device (CPLD)
 223          * http://blackfin.uclinux.org/gf/project/stamp/frs/?action=FrsReleaseBrowse&frs_package_id=165
 224          */
 225
 226         switch (fbi->disp_info->ppi_mode) {
 227         case USE_RGB565_16_BIT_PPI:
 228                 fbi->lcd_bpp = 16;
 229                 clocks_per_pix = 1;
 230                 cpld_pipeline_delay_cor = 0;
 231                 break;
 232         case USE_RGB565_8_BIT_PPI:
 233                 fbi->lcd_bpp = 16;
 234                 clocks_per_pix = 2;
 235                 cpld_pipeline_delay_cor = 3;
 236                 break;
 237         case USE_RGB888_8_BIT_PPI:
 238                 fbi->lcd_bpp = 24;
 239                 clocks_per_pix = 3;
 240                 cpld_pipeline_delay_cor = 5;
 241                 break;
 242         default:
 243                 return -EINVAL;
 244         }
 245
 246         /*
 247          * HS and VS timing parameters (all in number of PPI clk ticks)
 248          */
 249
 250         fbi->h_actpix = (LCD_X_RES * clocks_per_pix);   /* active horizontal pixel */
 251         fbi->h_period = (336 * clocks_per_pix);         /* HS period */
 252         fbi->h_pulse = (2 * clocks_per_pix);                            /* HS pulse width */
 253         fbi->h_start = (7 * clocks_per_pix + cpld_pipeline_delay_cor);  /* first valid pixel */
 254
 255         fbi->v_lines = (LCD_Y_RES + U_LINE);            /* total vertical lines */
 256         fbi->v_pulse = (2 * clocks_per_pix);            /* VS pulse width (1-5 H_PERIODs) */
 257         fbi->v_period = (fbi->h_period * fbi->v_lines); /* VS period */
 258
 259         return 0;
 260 }
 261
 262 static void bfin_lq035q1_config_ppi(struct bfin_lq035q1fb_info *fbi)
 263 {
 264         unsigned ppi_pmode;
 265
 266         if (fbi->disp_info->ppi_mode == USE_RGB565_16_BIT_PPI)
 267                 ppi_pmode = DLEN_16;
 268         else
 269                 ppi_pmode = (DLEN_8 | PACK_EN);
 270
 271         bfin_write_PPI_DELAY(fbi->h_start);
 272         bfin_write_PPI_COUNT(fbi->h_actpix - 1);
 273         bfin_write_PPI_FRAME(fbi->v_lines);
 274
 275         bfin_write_PPI_CONTROL(PPI_TX_MODE |       /* output mode , PORT_DIR */
 276                                 PPI_XFER_TYPE_11 | /* sync mode XFR_TYPE */
 277                                 PPI_PORT_CFG_01 |  /* two frame sync PORT_CFG */
 278                                 ppi_pmode |        /* 8/16 bit data length / PACK_EN? */
 279                                 PPI_POLS_1);       /* faling edge syncs POLS */
 280 }
 281
 282 static inline void bfin_lq035q1_disable_ppi(void)
 283 {
 284         bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() & ~PORT_EN);
 285 }
 286
 287 static inline void bfin_lq035q1_enable_ppi(void)
 288 {
 289         bfin_write_PPI_CONTROL(bfin_read_PPI_CONTROL() | PORT_EN);
 290 }
 291
 292 static void bfin_lq035q1_start_timers(void)
 293 {
 294         enable_gptimers(TIMER_VSYNCbit | TIMER_HSYNCbit);
 295 }
 296
 297 static void bfin_lq035q1_stop_timers(void)
 298 {
 299         disable_gptimers(TIMER_HSYNCbit | TIMER_VSYNCbit);
 300
 301         set_gptimer_status(0, TIMER_HSYNC_STATUS_TRUN | TIMER_VSYNC_STATUS_TRUN |
 302                                 TIMER_HSYNC_STATUS_TIMIL | TIMER_VSYNC_STATUS_TIMIL |
 303                                  TIMER_HSYNC_STATUS_TOVF | TIMER_VSYNC_STATUS_TOVF);
 304
 305 }
 306
 307 static void bfin_lq035q1_init_timers(struct bfin_lq035q1fb_info *fbi)
 308 {
 309
 310         bfin_lq035q1_stop_timers();
 311
 312         set_gptimer_period(TIMER_HSYNC_id, fbi->h_period);
 313         set_gptimer_pwidth(TIMER_HSYNC_id, fbi->h_pulse);
 314         set_gptimer_config(TIMER_HSYNC_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
 315                                       TIMER_TIN_SEL | TIMER_CLK_SEL|
 316                                       TIMER_EMU_RUN);
 317
 318         set_gptimer_period(TIMER_VSYNC_id, fbi->v_period);
 319         set_gptimer_pwidth(TIMER_VSYNC_id, fbi->v_pulse);
 320         set_gptimer_config(TIMER_VSYNC_id, TIMER_MODE_PWM | TIMER_PERIOD_CNT |
 321                                       TIMER_TIN_SEL | TIMER_CLK_SEL |
 322                                       TIMER_EMU_RUN);
 323
 324 }
 325
 326 static void bfin_lq035q1_config_dma(struct bfin_lq035q1fb_info *fbi)
 327 {
 328
 329
 330         set_dma_config(CH_PPI,
 331                        set_bfin_dma_config(DIR_READ, DMA_FLOW_AUTO,
 332                                            INTR_DISABLE, DIMENSION_2D,
 333                                            DATA_SIZE_16,
 334                                            DMA_NOSYNC_KEEP_DMA_BUF));
 335         set_dma_x_count(CH_PPI, (LCD_X_RES * fbi->lcd_bpp) / DMA_BUS_SIZE);
 336         set_dma_x_modify(CH_PPI, DMA_BUS_SIZE / 8);
 337         set_dma_y_count(CH_PPI, fbi->v_lines);
 338
 339         set_dma_y_modify(CH_PPI, DMA_BUS_SIZE / 8);
 340         set_dma_start_addr(CH_PPI, (unsigned long)fbi->fb_buffer);
 341
 342 }
 343
 344 static const u16 ppi0_req_16[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
 345                             P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
 346                             P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
 347                             P_PPI0_D6, P_PPI0_D7, P_PPI0_D8,
 348                             P_PPI0_D9, P_PPI0_D10, P_PPI0_D11,
 349                             P_PPI0_D12, P_PPI0_D13, P_PPI0_D14,
 350                             P_PPI0_D15, 0};
 351
 352 static const u16 ppi0_req_8[] = {P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2,
 353                             P_PPI0_D0, P_PPI0_D1, P_PPI0_D2,
 354                             P_PPI0_D3, P_PPI0_D4, P_PPI0_D5,
 355                             P_PPI0_D6, P_PPI0_D7, 0};
 356
 357 static inline void bfin_lq035q1_free_ports(unsigned ppi16)
 358 {
 359         if (ppi16)
 360                 peripheral_free_list(ppi0_req_16);
 361         else
 362                 peripheral_free_list(ppi0_req_8);
 363
 364         if (ANOMALY_05000400)
 365                 gpio_free(P_IDENT(P_PPI0_FS3));
 366 }
 367
 368 static int bfin_lq035q1_request_ports(struct platform_device *pdev,
 369                                       unsigned ppi16)
 370 {
 371         int ret;
 372         /* ANOMALY_05000400 - PPI Does Not Start Properly In Specific Mode:
 373          * Drive PPI_FS3 Low
 374          */
 375         if (ANOMALY_05000400) {
 376                 int ret = gpio_request_one(P_IDENT(P_PPI0_FS3),
 377                                         GPIOF_OUT_INIT_LOW, "PPI_FS3");
 378                 if (ret)
 379                         return ret;
 380         }
 381
 382         if (ppi16)
 383                 ret = peripheral_request_list(ppi0_req_16, DRIVER_NAME);
 384         else
 385                 ret = peripheral_request_list(ppi0_req_8, DRIVER_NAME);
 386
 387         if (ret) {
 388                 dev_err(&pdev->dev, "requesting peripherals failed\n");
 389                 return -EFAULT;
 390         }
 391
 392         return 0;
 393 }
 394
 395 static int bfin_lq035q1_fb_open(struct fb_info *info, int user)
 396 {
 397         struct bfin_lq035q1fb_info *fbi = info->par;
 398
 399         spin_lock(&fbi->lock);
 400         fbi->lq035_open_cnt++;
 401
 402         if (fbi->lq035_open_cnt <= 1) {
 403
 404                 bfin_lq035q1_disable_ppi();
 405                 SSYNC();
 406
 407                 bfin_lq035q1_config_dma(fbi);
 408                 bfin_lq035q1_config_ppi(fbi);
 409                 bfin_lq035q1_init_timers(fbi);
 410
 411                 /* start dma */
 412                 enable_dma(CH_PPI);
 413                 bfin_lq035q1_enable_ppi();
 414                 bfin_lq035q1_start_timers();
 415                 lq035q1_backlight(fbi, 1);
 416         }
 417
 418         spin_unlock(&fbi->lock);
 419
 420         return 0;
 421 }
 422
 423 static int bfin_lq035q1_fb_release(struct fb_info *info, int user)
 424 {
 425         struct bfin_lq035q1fb_info *fbi = info->par;
 426
 427         spin_lock(&fbi->lock);
 428
 429         fbi->lq035_open_cnt--;
 430
 431         if (fbi->lq035_open_cnt <= 0) {
 432                 lq035q1_backlight(fbi, 0);
 433                 bfin_lq035q1_disable_ppi();
 434                 SSYNC();
 435                 disable_dma(CH_PPI);
 436                 bfin_lq035q1_stop_timers();
 437         }
 438
 439         spin_unlock(&fbi->lock);
 440
 441         return 0;
 442 }
 443
 444 static int bfin_lq035q1_fb_check_var(struct fb_var_screeninfo *var,
 445                                      struct fb_info *info)
 446 {
 447         struct bfin_lq035q1fb_info *fbi = info->par;
 448
 449         if (var->bits_per_pixel == fbi->lcd_bpp) {
 450                 var->red.offset = info->var.red.offset;
 451                 var->green.offset = info->var.green.offset;
 452                 var->blue.offset = info->var.blue.offset;
 453                 var->red.length = info->var.red.length;
 454                 var->green.length = info->var.green.length;
 455                 var->blue.length = info->var.blue.length;
 456                 var->transp.offset = 0;
 457                 var->transp.length = 0;
 458                 var->transp.msb_right = 0;
 459                 var->red.msb_right = 0;
 460                 var->green.msb_right = 0;
 461                 var->blue.msb_right = 0;
 462         } else {
 463                 pr_debug("%s: depth not supported: %u BPP\n", __func__,
 464                          var->bits_per_pixel);
 465                 return -EINVAL;
 466         }
 467
 468         if (info->var.xres != var->xres || info->var.yres != var->yres ||
 469             info->var.xres_virtual != var->xres_virtual ||
 470             info->var.yres_virtual != var->yres_virtual) {
 471                 pr_debug("%s: Resolution not supported: X%u x Y%u \n",
 472                          __func__, var->xres, var->yres);
 473                 return -EINVAL;
 474         }
 475
 476         /*
 477          *  Memory limit
 478          */
 479
 480         if ((info->fix.line_length * var->yres_virtual) > info->fix.smem_len) {
 481                 pr_debug("%s: Memory Limit requested yres_virtual = %u\n",
 482                          __func__, var->yres_virtual);
 483                 return -ENOMEM;
 484         }
 485
 486
 487         return 0;
 488 }
 489
 490 int bfin_lq035q1_fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
 491 {
 492         if (nocursor)
 493                 return 0;
 494         else
 495                 return -EINVAL; /* just to force soft_cursor() call */
 496 }
 497
 498 static int bfin_lq035q1_fb_setcolreg(u_int regno, u_int red, u_int green,
 499                                    u_int blue, u_int transp,
 500                                    struct fb_info *info)
 501 {
 502         if (regno >= BFIN_LCD_NBR_PALETTE_ENTRIES)
 503                 return -EINVAL;
 504
 505         if (info->var.grayscale) {
 506                 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
 507                 red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
 508         }
 509
 510         if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
 511
 512                 u32 value;
 513                 /* Place color in the pseudopalette */
 514                 if (regno > 16)
 515                         return -EINVAL;
 516
 517                 red >>= (16 - info->var.red.length);
 518                 green >>= (16 - info->var.green.length);
 519                 blue >>= (16 - info->var.blue.length);
 520
 521                 value = (red << info->var.red.offset) |
 522                     (green << info->var.green.offset) |
 523                     (blue << info->var.blue.offset);
 524                 value &= 0xFFFFFF;
 525
 526                 ((u32 *) (info->pseudo_palette))[regno] = value;
 527
 528         }
 529
 530         return 0;
 531 }
 532
 533 static struct fb_ops bfin_lq035q1_fb_ops = {
 534         .owner = THIS_MODULE,
 535         .fb_open = bfin_lq035q1_fb_open,
 536         .fb_release = bfin_lq035q1_fb_release,
 537         .fb_check_var = bfin_lq035q1_fb_check_var,
 538         .fb_fillrect = cfb_fillrect,
 539         .fb_copyarea = cfb_copyarea,
 540         .fb_imageblit = cfb_imageblit,
 541         .fb_cursor = bfin_lq035q1_fb_cursor,
 542         .fb_setcolreg = bfin_lq035q1_fb_setcolreg,
 543 };
 544
 545 static irqreturn_t bfin_lq035q1_irq_error(int irq, void *dev_id)
 546 {
 547         /*struct bfin_lq035q1fb_info *info = (struct bfin_lq035q1fb_info *)dev_id;*/
 548
 549         u16 status = bfin_read_PPI_STATUS();
 550         bfin_write_PPI_STATUS(-1);
 551
 552         if (status) {
 553                 bfin_lq035q1_disable_ppi();
 554                 disable_dma(CH_PPI);
 555
 556                 /* start dma */
 557                 enable_dma(CH_PPI);
 558                 bfin_lq035q1_enable_ppi();
 559                 bfin_write_PPI_STATUS(-1);
 560         }
 561
 562         return IRQ_HANDLED;
 563 }
 564
 565 static int bfin_lq035q1_probe(struct platform_device *pdev)
 566 {
 567         struct bfin_lq035q1fb_info *info;
 568         struct fb_info *fbinfo;
 569         u32 active_video_mem_offset;
 570         int ret;
 571
 572         ret = request_dma(CH_PPI, DRIVER_NAME"_CH_PPI");
 573         if (ret < 0) {
 574                 dev_err(&pdev->dev, "PPI DMA unavailable\n");
 575                 goto out1;
 576         }
 577
 578         fbinfo = framebuffer_alloc(sizeof(*info), &pdev->dev);
 579         if (!fbinfo) {
 580                 ret = -ENOMEM;
 581                 goto out2;
 582         }
 583
 584         info = fbinfo->par;
 585         info->fb = fbinfo;
 586         info->dev = &pdev->dev;
 587         spin_lock_init(&info->lock);
 588
 589         info->disp_info = pdev->dev.platform_data;
 590
 591         platform_set_drvdata(pdev, fbinfo);
 592
 593         ret = bfin_lq035q1_calc_timing(info);
 594         if (ret < 0) {
 595                 dev_err(&pdev->dev, "Failed PPI Mode\n");
 596                 goto out3;
 597         }
 598
 599         strcpy(fbinfo->fix.id, DRIVER_NAME);
 600
 601         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
 602         fbinfo->fix.type_aux = 0;
 603         fbinfo->fix.xpanstep = 0;
 604         fbinfo->fix.ypanstep = 0;
 605         fbinfo->fix.ywrapstep = 0;
 606         fbinfo->fix.accel = FB_ACCEL_NONE;
 607         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
 608
 609         fbinfo->var.nonstd = 0;
 610         fbinfo->var.activate = FB_ACTIVATE_NOW;
 611         fbinfo->var.height = -1;
 612         fbinfo->var.width = -1;
 613         fbinfo->var.accel_flags = 0;
 614         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
 615
 616         fbinfo->var.xres = LCD_X_RES;
 617         fbinfo->var.xres_virtual = LCD_X_RES;
 618         fbinfo->var.yres = LCD_Y_RES;
 619         fbinfo->var.yres_virtual = LCD_Y_RES;
 620         fbinfo->var.bits_per_pixel = info->lcd_bpp;
 621
 622         if (info->disp_info->mode & LQ035_BGR) {
 623                 if (info->lcd_bpp == 24) {
 624                         fbinfo->var.red.offset = 0;
 625                         fbinfo->var.green.offset = 8;
 626                         fbinfo->var.blue.offset = 16;
 627                 } else {
 628                         fbinfo->var.red.offset = 0;
 629                         fbinfo->var.green.offset = 5;
 630                         fbinfo->var.blue.offset = 11;
 631                 }
 632         } else {
 633                 if (info->lcd_bpp == 24) {
 634                         fbinfo->var.red.offset = 16;
 635                         fbinfo->var.green.offset = 8;
 636                         fbinfo->var.blue.offset = 0;
 637                 } else {
 638                         fbinfo->var.red.offset = 11;
 639                         fbinfo->var.green.offset = 5;
 640                         fbinfo->var.blue.offset = 0;
 641                 }
 642         }
 643
 644         fbinfo->var.transp.offset = 0;
 645
 646         if (info->lcd_bpp == 24) {
 647                 fbinfo->var.red.length = 8;
 648                 fbinfo->var.green.length = 8;
 649                 fbinfo->var.blue.length = 8;
 650         } else {
 651                 fbinfo->var.red.length = 5;
 652                 fbinfo->var.green.length = 6;
 653                 fbinfo->var.blue.length = 5;
 654         }
 655
 656         fbinfo->var.transp.length = 0;
 657
 658         active_video_mem_offset = ((U_LINE / 2) * LCD_X_RES * (info->lcd_bpp / 8));
 659
 660         fbinfo->fix.smem_len = LCD_X_RES * LCD_Y_RES * info->lcd_bpp / 8
 661                                 + active_video_mem_offset;
 662
 663         fbinfo->fix.line_length = fbinfo->var.xres_virtual *
 664             fbinfo->var.bits_per_pixel / 8;
 665
 666
 667         fbinfo->fbops = &bfin_lq035q1_fb_ops;
 668         fbinfo->flags = FBINFO_FLAG_DEFAULT;
 669
 670         info->fb_buffer =
 671             dma_alloc_coherent(NULL, fbinfo->fix.smem_len, &info->dma_handle,
 672                                GFP_KERNEL);
 673
 674         if (NULL == info->fb_buffer) {
 675                 dev_err(&pdev->dev, "couldn't allocate dma buffer\n");
 676                 ret = -ENOMEM;
 677                 goto out3;
 678         }
 679
 680         fbinfo->screen_base = (void *)info->fb_buffer + active_video_mem_offset;
 681         fbinfo->fix.smem_start = (int)info->fb_buffer + active_video_mem_offset;
 682
 683         fbinfo->fbops = &bfin_lq035q1_fb_ops;
 684
 685         fbinfo->pseudo_palette = &info->pseudo_pal;
 686
 687         ret = fb_alloc_cmap(&fbinfo->cmap, BFIN_LCD_NBR_PALETTE_ENTRIES, 0);
 688         if (ret < 0) {
 689                 dev_err(&pdev->dev, "failed to allocate colormap (%d entries)\n",
 690                        BFIN_LCD_NBR_PALETTE_ENTRIES);
 691                 goto out4;
 692         }
 693
 694         ret = bfin_lq035q1_request_ports(pdev,
 695                         info->disp_info->ppi_mode == USE_RGB565_16_BIT_PPI);
 696         if (ret) {
 697                 dev_err(&pdev->dev, "couldn't request gpio port\n");
 698                 goto out6;
 699         }
 700
 701         info->irq = platform_get_irq(pdev, 0);
 702         if (info->irq < 0) {
 703                 ret = -EINVAL;
 704                 goto out7;
 705         }
 706
 707         ret = request_irq(info->irq, bfin_lq035q1_irq_error, 0,
 708                         DRIVER_NAME" PPI ERROR", info);
 709         if (ret < 0) {
 710                 dev_err(&pdev->dev, "unable to request PPI ERROR IRQ\n");
 711                 goto out7;
 712         }
 713
 714         info->spidrv.driver.name = DRIVER_NAME"-spi";
 715         info->spidrv.probe    = lq035q1_spidev_probe;
 716         info->spidrv.remove   = lq035q1_spidev_remove;
 717         info->spidrv.shutdown = lq035q1_spidev_shutdown;
 718         info->spidrv.driver.pm = LQ035Q1_SPIDEV_PM_OPS;
 719
 720         ret = spi_register_driver(&info->spidrv);
 721         if (ret < 0) {
 722                 dev_err(&pdev->dev, "couldn't register SPI Interface\n");
 723                 goto out8;
 724         }
 725
 726         if (info->disp_info->use_bl) {
 727                 ret = gpio_request_one(info->disp_info->gpio_bl,
 728                                         GPIOF_OUT_INIT_LOW, "LQ035 Backlight");
 729
 730                 if (ret) {
 731                         dev_err(&pdev->dev, "failed to request GPIO %d\n",
 732                                 info->disp_info->gpio_bl);
 733                         goto out9;
 734                 }
 735         }
 736
 737         ret = register_framebuffer(fbinfo);
 738         if (ret < 0) {
 739                 dev_err(&pdev->dev, "unable to register framebuffer\n");
 740                 goto out10;
 741         }
 742
 743         dev_info(&pdev->dev, "%dx%d %d-bit RGB FrameBuffer initialized\n",
 744                 LCD_X_RES, LCD_Y_RES, info->lcd_bpp);
 745
 746         return 0;
 747
 748  out10:
 749         if (info->disp_info->use_bl)
 750                 gpio_free(info->disp_info->gpio_bl);
 751  out9:
 752         spi_unregister_driver(&info->spidrv);
 753  out8:
 754         free_irq(info->irq, info);
 755  out7:
 756         bfin_lq035q1_free_ports(info->disp_info->ppi_mode ==
 757                                 USE_RGB565_16_BIT_PPI);
 758  out6:
 759         fb_dealloc_cmap(&fbinfo->cmap);
 760  out4:
 761         dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 762                           info->dma_handle);
 763  out3:
 764         framebuffer_release(fbinfo);
 765  out2:
 766         free_dma(CH_PPI);
 767  out1:
 768
 769         return ret;
 770 }
 771
 772 static int bfin_lq035q1_remove(struct platform_device *pdev)
 773 {
 774         struct fb_info *fbinfo = platform_get_drvdata(pdev);
 775         struct bfin_lq035q1fb_info *info = fbinfo->par;
 776
 777         if (info->disp_info->use_bl)
 778                 gpio_free(info->disp_info->gpio_bl);
 779
 780         spi_unregister_driver(&info->spidrv);
 781
 782         unregister_framebuffer(fbinfo);
 783
 784         free_dma(CH_PPI);
 785         free_irq(info->irq, info);
 786
 787         if (info->fb_buffer != NULL)
 788                 dma_free_coherent(NULL, fbinfo->fix.smem_len, info->fb_buffer,
 789                                   info->dma_handle);
 790
 791         fb_dealloc_cmap(&fbinfo->cmap);
 792
 793         bfin_lq035q1_free_ports(info->disp_info->ppi_mode ==
 794                                 USE_RGB565_16_BIT_PPI);
 795
 796         framebuffer_release(fbinfo);
 797
 798         dev_info(&pdev->dev, "unregistered LCD driver\n");
 799
 800         return 0;
 801 }
 802
 803 #ifdef CONFIG_PM
 804 static int bfin_lq035q1_suspend(struct device *dev)
 805 {
 806         struct fb_info *fbinfo = dev_get_drvdata(dev);
 807         struct bfin_lq035q1fb_info *info = fbinfo->par;
 808
 809         if (info->lq035_open_cnt) {
 810                 lq035q1_backlight(info, 0);
 811                 bfin_lq035q1_disable_ppi();
 812                 SSYNC();
 813                 disable_dma(CH_PPI);
 814                 bfin_lq035q1_stop_timers();
 815                 bfin_write_PPI_STATUS(-1);
 816         }
 817
 818         return 0;
 819 }
 820
 821 static int bfin_lq035q1_resume(struct device *dev)
 822 {
 823         struct fb_info *fbinfo = dev_get_drvdata(dev);
 824         struct bfin_lq035q1fb_info *info = fbinfo->par;
 825
 826         if (info->lq035_open_cnt) {
 827                 bfin_lq035q1_disable_ppi();
 828                 SSYNC();
 829
 830                 bfin_lq035q1_config_dma(info);
 831                 bfin_lq035q1_config_ppi(info);
 832                 bfin_lq035q1_init_timers(info);
 833
 834                 /* start dma */
 835                 enable_dma(CH_PPI);
 836                 bfin_lq035q1_enable_ppi();
 837                 bfin_lq035q1_start_timers();
 838                 lq035q1_backlight(info, 1);
 839         }
 840
 841         return 0;
 842 }
 843
 844 static struct dev_pm_ops bfin_lq035q1_dev_pm_ops = {
 845         .suspend = bfin_lq035q1_suspend,
 846         .resume  = bfin_lq035q1_resume,
 847 };
 848 #endif
 849
 850 static struct platform_driver bfin_lq035q1_driver = {
 851         .probe   = bfin_lq035q1_probe,
 852         .remove  = bfin_lq035q1_remove,
 853         .driver = {
 854                 .name = DRIVER_NAME,
 855 #ifdef CONFIG_PM
 856                 .pm   = &bfin_lq035q1_dev_pm_ops,
 857 #endif
 858         },
 859 };
 860
 861 module_platform_driver(bfin_lq035q1_driver);
 862
 863 MODULE_DESCRIPTION("Blackfin TFT LCD Driver");
 864 MODULE_LICENSE("GPL");