board/cm-bf548/video.c

   1 /*
   2  * video.c - run splash screen on lcd
   3  *
   4  * Copyright (c) 2007-2008 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later.
   7  */
   8
   9 #include <stdarg.h>
  10 #include <common.h>
  11 #include <config.h>
  12 #include <malloc.h>
  13 #include <asm/blackfin.h>
  14 #include <asm/clock.h>
  15 #include <asm/gpio.h>
  16 #include <asm/portmux.h>
  17 #include <asm/mach-common/bits/dma.h>
  18 #include <i2c.h>
  19 #include <linux/types.h>
  20 #include <stdio_dev.h>
  21
  22 #include <lzma/LzmaTypes.h>
  23 #include <lzma/LzmaDec.h>
  24 #include <lzma/LzmaTools.h>
  25
  26 #define DMA_SIZE16      2
  27
  28 #include <asm/mach-common/bits/eppi.h>
  29
  30 #include EASYLOGO_HEADER
  31
  32 #define LCD_X_RES               480     /*Horizontal Resolution */
  33 #define LCD_Y_RES               272     /* Vertical Resolution */
  34
  35 #define LCD_BPP                 24      /* Bit Per Pixel */
  36 #define LCD_PIXEL_SIZE          (LCD_BPP / 8)
  37 #define DMA_BUS_SIZE            32
  38 #define ACTIVE_VIDEO_MEM_OFFSET 0
  39
  40 /*      -- Horizontal synchronizing --
  41  *
  42  * Timing characteristics taken from the SHARP LQ043T1DG01 datasheet
  43  * (LCY-W-06602A Page 9 of 22)
  44  *
  45  * Clock Frequency      1/Tc Min 7.83 Typ 9.00 Max 9.26 MHz
  46  *
  47  * Period               TH - 525 - Clock
  48  * Pulse width          THp - 41 - Clock
  49  * Horizontal period    THd - 480 - Clock
  50  * Back porch           THb - 2 - Clock
  51  * Front porch          THf - 2 - Clock
  52  *
  53  * -- Vertical synchronizing --
  54  * Period               TV - 286 - Line
  55  * Pulse width          TVp - 10 - Line
  56  * Vertical period      TVd - 272 - Line
  57  * Back porch           TVb - 2 - Line
  58  * Front porch          TVf - 2 - Line
  59  */
  60
  61 #define LCD_CLK                 (8*1000*1000)   /* 8MHz */
  62
  63 /* # active data to transfer after Horizontal Delay clock */
  64 #define EPPI_HCOUNT             LCD_X_RES
  65
  66 /* # active lines to transfer after Vertical Delay clock */
  67 #define EPPI_VCOUNT             LCD_Y_RES
  68
  69 /* Samples per Line = 480 (active data) + 45 (padding) */
  70 #define EPPI_LINE               525
  71
  72 /* Lines per Frame = 272 (active data) + 14 (padding) */
  73 #define EPPI_FRAME              286
  74
  75 /* FS1 (Hsync) Width (Typical)*/
  76 #define EPPI_FS1W_HBL           41
  77
  78 /* FS1 (Hsync) Period (Typical) */
  79 #define EPPI_FS1P_AVPL          EPPI_LINE
  80
  81 /* Horizontal Delay clock after assertion of Hsync (Typical) */
  82 #define EPPI_HDELAY             43
  83
  84 /* FS2 (Vsync) Width    = FS1 (Hsync) Period * 10 */
  85 #define EPPI_FS2W_LVB           (EPPI_LINE * 10)
  86
  87  /* FS2 (Vsync) Period   = FS1 (Hsync) Period * Lines per Frame */
  88 #define EPPI_FS2P_LAVF          (EPPI_LINE * EPPI_FRAME)
  89
  90 /* Vertical Delay after assertion of Vsync (2 Lines) */
  91 #define EPPI_VDELAY             12
  92
  93 #define EPPI_CLIP               0xFF00FF00
  94
  95 /* EPPI Control register configuration value for RGB out
  96  * - EPPI as Output
  97  * GP 2 frame sync mode,
  98  * Internal Clock generation disabled, Internal FS generation enabled,
  99  * Receives samples on EPPI_CLK raising edge, Transmits samples on EPPI_CLK falling edge,
 100  * FS1 & FS2 are active high,
 101  * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
 102  * DMA Unpacking disabled when RGB Formating is enabled, otherwise DMA unpacking enabled
 103  * Swapping Enabled,
 104  * One (DMA) Channel Mode,
 105  * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
 106  * Regular watermark - when FIFO is 100% full,
 107  * Urgent watermark - when FIFO is 75% full
 108  */
 109
 110 #define EPPI_CONTROL            (0x20136E2E)
 111
 112 static inline u16 get_eppi_clkdiv(u32 target_ppi_clk)
 113 {
 114         u32 sclk = get_sclk();
 115
 116         /* EPPI_CLK = (SCLK) / (2 * (EPPI_CLKDIV[15:0] + 1)) */
 117
 118         return (((sclk / target_ppi_clk) / 2) - 1);
 119 }
 120
 121 void Init_PPI(void)
 122 {
 123         u16 eppi_clkdiv = get_eppi_clkdiv(LCD_CLK);
 124
 125         bfin_write_EPPI0_FS1W_HBL(EPPI_FS1W_HBL);
 126         bfin_write_EPPI0_FS1P_AVPL(EPPI_FS1P_AVPL);
 127         bfin_write_EPPI0_FS2W_LVB(EPPI_FS2W_LVB);
 128         bfin_write_EPPI0_FS2P_LAVF(EPPI_FS2P_LAVF);
 129         bfin_write_EPPI0_CLIP(EPPI_CLIP);
 130
 131         bfin_write_EPPI0_FRAME(EPPI_FRAME);
 132         bfin_write_EPPI0_LINE(EPPI_LINE);
 133
 134         bfin_write_EPPI0_HCOUNT(EPPI_HCOUNT);
 135         bfin_write_EPPI0_HDELAY(EPPI_HDELAY);
 136         bfin_write_EPPI0_VCOUNT(EPPI_VCOUNT);
 137         bfin_write_EPPI0_VDELAY(EPPI_VDELAY);
 138
 139         bfin_write_EPPI0_CLKDIV(eppi_clkdiv);
 140
 141 /*
 142  * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
 143  * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
 144  */
 145 #if defined(CONFIG_VIDEO_RGB666)
 146         bfin_write_EPPI0_CONTROL((EPPI_CONTROL & ~DLENGTH) | DLEN_18 |
 147                                  RGB_FMT_EN);
 148 #else
 149         bfin_write_EPPI0_CONTROL(((EPPI_CONTROL & ~DLENGTH) | DLEN_24) &
 150                                  ~RGB_FMT_EN);
 151 #endif
 152
 153 }
 154
 155 #define               DEB2_URGENT  0x2000       /* DEB2 Urgent */
 156
 157 void Init_DMA(void *dst)
 158 {
 159 #if defined(CONFIG_DEB_DMA_URGENT)
 160         bfin_write_EBIU_DDRQUE(bfin_read_EBIU_DDRQUE() | DEB2_URGENT);
 161 #endif
 162
 163         bfin_write_DMA12_START_ADDR(dst);
 164
 165         /* X count */
 166         bfin_write_DMA12_X_COUNT((LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE);
 167         bfin_write_DMA12_X_MODIFY(DMA_BUS_SIZE / 8);
 168
 169         /* Y count */
 170         bfin_write_DMA12_Y_COUNT(LCD_Y_RES);
 171         bfin_write_DMA12_Y_MODIFY(DMA_BUS_SIZE / 8);
 172
 173         /* DMA Config */
 174         bfin_write_DMA12_CONFIG(
 175             WDSIZE_32 | /* 32 bit DMA */
 176             DMA2D |             /* 2D DMA */
 177             FLOW_AUTO           /* autobuffer mode */
 178         );
 179 }
 180
 181 void Init_Ports(void)
 182 {
 183         const unsigned short pins[] = {
 184                 P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3, P_PPI0_D4,
 185                 P_PPI0_D5, P_PPI0_D6, P_PPI0_D7, P_PPI0_D8, P_PPI0_D9,
 186                 P_PPI0_D10, P_PPI0_D11, P_PPI0_D12, P_PPI0_D13, P_PPI0_D14,
 187                 P_PPI0_D15, P_PPI0_D16, P_PPI0_D17,
 188 #if !defined(CONFIG_VIDEO_RGB666)
 189                 P_PPI0_D18, P_PPI0_D19, P_PPI0_D20, P_PPI0_D21, P_PPI0_D22,
 190                 P_PPI0_D23,
 191 #endif
 192                 P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2, 0,
 193         };
 194         peripheral_request_list(pins, "lcd");
 195
 196         gpio_request(GPIO_PE3, "lcd-disp");
 197         gpio_direction_output(GPIO_PE3, 1);
 198 }
 199
 200 void EnableDMA(void)
 201 {
 202         bfin_write_DMA12_CONFIG(bfin_read_DMA12_CONFIG() | DMAEN);
 203 }
 204
 205 void DisableDMA(void)
 206 {
 207         bfin_write_DMA12_CONFIG(bfin_read_DMA12_CONFIG() & ~DMAEN);
 208 }
 209
 210 /* enable and disable PPI functions */
 211 void EnablePPI(void)
 212 {
 213         bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
 214 }
 215
 216 void DisablePPI(void)
 217 {
 218         bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
 219 }
 220
 221 int video_init(void *dst)
 222 {
 223         Init_Ports();
 224         Init_DMA(dst);
 225         EnableDMA();
 226         Init_PPI();
 227         EnablePPI();
 228
 229         return 0;
 230 }
 231
 232 void video_stop(void)
 233 {
 234         DisablePPI();
 235         DisableDMA();
 236 }
 237
 238 static void dma_bitblit(void *dst, fastimage_t *logo, int x, int y)
 239 {
 240         if (dcache_status())
 241                 blackfin_dcache_flush_range(logo->data,
 242                                             logo->data + logo->size);
 243
 244         bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR);
 245
 246         /* Setup destination start address */
 247         bfin_write_MDMA_D0_START_ADDR(dst + ((x & -2) * LCD_PIXEL_SIZE)
 248                                       + (y * LCD_X_RES * LCD_PIXEL_SIZE));
 249         /* Setup destination xcount */
 250         bfin_write_MDMA_D0_X_COUNT(logo->width * LCD_PIXEL_SIZE / DMA_SIZE16);
 251         /* Setup destination xmodify */
 252         bfin_write_MDMA_D0_X_MODIFY(DMA_SIZE16);
 253
 254         /* Setup destination ycount */
 255         bfin_write_MDMA_D0_Y_COUNT(logo->height);
 256         /* Setup destination ymodify */
 257         bfin_write_MDMA_D0_Y_MODIFY((LCD_X_RES - logo->width) * LCD_PIXEL_SIZE +
 258                                     DMA_SIZE16);
 259
 260         /* Setup Source start address */
 261         bfin_write_MDMA_S0_START_ADDR(logo->data);
 262         /* Setup Source xcount */
 263         bfin_write_MDMA_S0_X_COUNT(logo->width * LCD_PIXEL_SIZE / DMA_SIZE16);
 264         /* Setup Source xmodify */
 265         bfin_write_MDMA_S0_X_MODIFY(DMA_SIZE16);
 266
 267         /* Setup Source ycount */
 268         bfin_write_MDMA_S0_Y_COUNT(logo->height);
 269         /* Setup Source ymodify */
 270         bfin_write_MDMA_S0_Y_MODIFY(DMA_SIZE16);
 271
 272         /* Enable source DMA */
 273         bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_16 | DMA2D);
 274         SSYNC();
 275         bfin_write_MDMA_D0_CONFIG(WNR | DMAEN | WDSIZE_16 | DMA2D);
 276
 277         while (bfin_read_MDMA_D0_IRQ_STATUS() & DMA_RUN) ;
 278
 279         bfin_write_MDMA_S0_IRQ_STATUS(bfin_read_MDMA_S0_IRQ_STATUS() | DMA_DONE
 280                                       | DMA_ERR);
 281         bfin_write_MDMA_D0_IRQ_STATUS(bfin_read_MDMA_D0_IRQ_STATUS() | DMA_DONE
 282                                       | DMA_ERR);
 283
 284 }
 285
 286 int drv_video_init(void)
 287 {
 288         int error, devices = 1;
 289         struct stdio_dev videodev;
 290
 291         u8 *dst;
 292         u32 fbmem_size =
 293             LCD_X_RES * LCD_Y_RES * LCD_PIXEL_SIZE + ACTIVE_VIDEO_MEM_OFFSET;
 294
 295         dst = malloc(fbmem_size);
 296
 297         if (dst == NULL) {
 298                 printf("Failed to alloc FB memory\n");
 299                 return -1;
 300         }
 301
 302 #ifdef EASYLOGO_ENABLE_GZIP
 303         unsigned char *data = EASYLOGO_DECOMP_BUFFER;
 304         unsigned long src_len = EASYLOGO_ENABLE_GZIP;
 305         error = gunzip(data, bfin_logo.size, bfin_logo.data, &src_len);
 306         bfin_logo.data = data;
 307 #elif defined(EASYLOGO_ENABLE_LZMA)
 308         unsigned char *data = EASYLOGO_DECOMP_BUFFER;
 309         SizeT lzma_len = bfin_logo.size;
 310         error = lzmaBuffToBuffDecompress(data, &lzma_len,
 311                 bfin_logo.data, EASYLOGO_ENABLE_LZMA);
 312         bfin_logo.data = data;
 313 #else
 314         error = 0;
 315 #endif
 316
 317         if (error) {
 318                 puts("Failed to decompress logo\n");
 319                 free(dst);
 320                 return -1;
 321         }
 322
 323         memset(dst + ACTIVE_VIDEO_MEM_OFFSET, bfin_logo.data[0],
 324                fbmem_size - ACTIVE_VIDEO_MEM_OFFSET);
 325
 326         dma_bitblit(dst + ACTIVE_VIDEO_MEM_OFFSET, &bfin_logo,
 327                     (LCD_X_RES - bfin_logo.width) / 2,
 328                     (LCD_Y_RES - bfin_logo.height) / 2);
 329
 330         video_init(dst);        /* Video initialization */
 331
 332         memset(&videodev, 0, sizeof(videodev));
 333
 334         strcpy(videodev.name, "video");
 335
 336         error = stdio_register(&videodev);
 337
 338         return (error == 0) ? devices : error;
 339 }