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/gpio.h>
  15 #include <asm/portmux.h>
  16 #include <asm/mach-common/bits/dma.h>
  17 #include <i2c.h>
  18 #include <linux/types.h>
  19 #include <stdio_dev.h>
  20
  21 #ifdef CONFIG_VIDEO
  22
  23 #define DMA_SIZE16      2
  24
  25 #include <asm/mach-common/bits/eppi.h>
  26
  27 #include <asm/bfin_logo_230x230.h>
  28
  29 #define LCD_X_RES               480     /*Horizontal Resolution */
  30 #define LCD_Y_RES               272     /* Vertical Resolution */
  31
  32 #define LCD_BPP                 24      /* Bit Per Pixel */
  33 #define LCD_PIXEL_SIZE          (LCD_BPP / 8)
  34 #define DMA_BUS_SIZE            32
  35 #define ACTIVE_VIDEO_MEM_OFFSET 0
  36
  37 /*      -- Horizontal synchronizing --
  38  *
  39  * Timing characteristics taken from the SHARP LQ043T1DG01 datasheet
  40  * (LCY-W-06602A Page 9 of 22)
  41  *
  42  * Clock Frequency      1/Tc Min 7.83 Typ 9.00 Max 9.26 MHz
  43  *
  44  * Period               TH - 525 - Clock
  45  * Pulse width          THp - 41 - Clock
  46  * Horizontal period    THd - 480 - Clock
  47  * Back porch           THb - 2 - Clock
  48  * Front porch          THf - 2 - Clock
  49  *
  50  * -- Vertical synchronizing --
  51  * Period               TV - 286 - Line
  52  * Pulse width          TVp - 10 - Line
  53  * Vertical period      TVd - 272 - Line
  54  * Back porch           TVb - 2 - Line
  55  * Front porch          TVf - 2 - Line
  56  */
  57
  58 #define LCD_CLK                 (8*1000*1000)   /* 8MHz */
  59
  60 /* # active data to transfer after Horizontal Delay clock */
  61 #define EPPI_HCOUNT             LCD_X_RES
  62
  63 /* # active lines to transfer after Vertical Delay clock */
  64 #define EPPI_VCOUNT             LCD_Y_RES
  65
  66 /* Samples per Line = 480 (active data) + 45 (padding) */
  67 #define EPPI_LINE               525
  68
  69 /* Lines per Frame = 272 (active data) + 14 (padding) */
  70 #define EPPI_FRAME              286
  71
  72 /* FS1 (Hsync) Width (Typical)*/
  73 #define EPPI_FS1W_HBL           41
  74
  75 /* FS1 (Hsync) Period (Typical) */
  76 #define EPPI_FS1P_AVPL          EPPI_LINE
  77
  78 /* Horizontal Delay clock after assertion of Hsync (Typical) */
  79 #define EPPI_HDELAY             43
  80
  81 /* FS2 (Vsync) Width    = FS1 (Hsync) Period * 10 */
  82 #define EPPI_FS2W_LVB           (EPPI_LINE * 10)
  83
  84  /* FS2 (Vsync) Period   = FS1 (Hsync) Period * Lines per Frame */
  85 #define EPPI_FS2P_LAVF          (EPPI_LINE * EPPI_FRAME)
  86
  87 /* Vertical Delay after assertion of Vsync (2 Lines) */
  88 #define EPPI_VDELAY             12
  89
  90 #define EPPI_CLIP               0xFF00FF00
  91
  92 /* EPPI Control register configuration value for RGB out
  93  * - EPPI as Output
  94  * GP 2 frame sync mode,
  95  * Internal Clock generation disabled, Internal FS generation enabled,
  96  * Receives samples on EPPI_CLK raising edge, Transmits samples on EPPI_CLK falling edge,
  97  * FS1 & FS2 are active high,
  98  * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
  99  * DMA Unpacking disabled when RGB Formating is enabled, otherwise DMA unpacking enabled
 100  * Swapping Enabled,
 101  * One (DMA) Channel Mode,
 102  * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
 103  * Regular watermark - when FIFO is 100% full,
 104  * Urgent watermark - when FIFO is 75% full
 105  */
 106
 107 #define EPPI_CONTROL            (0x20136E2E)
 108
 109 static inline u16 get_eppi_clkdiv(u32 target_ppi_clk)
 110 {
 111         u32 sclk = get_sclk();
 112
 113         /* EPPI_CLK = (SCLK) / (2 * (EPPI_CLKDIV[15:0] + 1)) */
 114
 115         return (((sclk / target_ppi_clk) / 2) - 1);
 116 }
 117
 118 void Init_PPI(void)
 119 {
 120         u16 eppi_clkdiv = get_eppi_clkdiv(LCD_CLK);
 121
 122         bfin_write_EPPI0_FS1W_HBL(EPPI_FS1W_HBL);
 123         bfin_write_EPPI0_FS1P_AVPL(EPPI_FS1P_AVPL);
 124         bfin_write_EPPI0_FS2W_LVB(EPPI_FS2W_LVB);
 125         bfin_write_EPPI0_FS2P_LAVF(EPPI_FS2P_LAVF);
 126         bfin_write_EPPI0_CLIP(EPPI_CLIP);
 127
 128         bfin_write_EPPI0_FRAME(EPPI_FRAME);
 129         bfin_write_EPPI0_LINE(EPPI_LINE);
 130
 131         bfin_write_EPPI0_HCOUNT(EPPI_HCOUNT);
 132         bfin_write_EPPI0_HDELAY(EPPI_HDELAY);
 133         bfin_write_EPPI0_VCOUNT(EPPI_VCOUNT);
 134         bfin_write_EPPI0_VDELAY(EPPI_VDELAY);
 135
 136         bfin_write_EPPI0_CLKDIV(eppi_clkdiv);
 137
 138 /*
 139  * DLEN = 6 (24 bits for RGB888 out) or 5 (18 bits for RGB666 out)
 140  * RGB Formatting Enabled for RGB666 output, disabled for RGB888 output
 141  */
 142 #if defined(CONFIG_VIDEO_RGB666)
 143         bfin_write_EPPI0_CONTROL((EPPI_CONTROL & ~DLENGTH) | DLEN_18 |
 144                                  RGB_FMT_EN);
 145 #else
 146         bfin_write_EPPI0_CONTROL(((EPPI_CONTROL & ~DLENGTH) | DLEN_24) &
 147                                  ~RGB_FMT_EN);
 148 #endif
 149
 150 }
 151
 152 #define               DEB2_URGENT  0x2000       /* DEB2 Urgent */
 153
 154 void Init_DMA(void *dst)
 155 {
 156
 157 #if defined(CONFIG_DEB_DMA_URGENT)
 158         *pEBIU_DDRQUE |= DEB2_URGENT;
 159 #endif
 160
 161         *pDMA12_START_ADDR = dst;
 162
 163         /* X count */
 164         *pDMA12_X_COUNT = (LCD_X_RES * LCD_BPP) / DMA_BUS_SIZE;
 165         *pDMA12_X_MODIFY = DMA_BUS_SIZE / 8;
 166
 167         /* Y count */
 168         *pDMA12_Y_COUNT = LCD_Y_RES;
 169         *pDMA12_Y_MODIFY = DMA_BUS_SIZE / 8;
 170
 171         /* DMA Config */
 172         *pDMA12_CONFIG = WDSIZE_32 |    /* 32 bit DMA */
 173             DMA2D |             /* 2D DMA */
 174             FLOW_AUTO;          /* autobuffer mode */
 175 }
 176
 177 void Init_Ports(void)
 178 {
 179         const unsigned short pins[] = {
 180                 P_PPI0_D0, P_PPI0_D1, P_PPI0_D2, P_PPI0_D3, P_PPI0_D4,
 181                 P_PPI0_D5, P_PPI0_D6, P_PPI0_D7, P_PPI0_D8, P_PPI0_D9,
 182                 P_PPI0_D10, P_PPI0_D11, P_PPI0_D12, P_PPI0_D13, P_PPI0_D14,
 183                 P_PPI0_D15, P_PPI0_D16, P_PPI0_D17,
 184 #if !defined(CONFIG_VIDEO_RGB666)
 185                 P_PPI0_D18, P_PPI0_D19, P_PPI0_D20, P_PPI0_D21, P_PPI0_D22,
 186                 P_PPI0_D23,
 187 #endif
 188                 P_PPI0_CLK, P_PPI0_FS1, P_PPI0_FS2, 0,
 189         };
 190         peripheral_request_list(pins, "lcd");
 191
 192         gpio_request(GPIO_PE3, "lcd-disp");
 193         gpio_direction_output(GPIO_PE3, 1);
 194 }
 195
 196 void EnableDMA(void)
 197 {
 198         *pDMA12_CONFIG |= DMAEN;
 199 }
 200
 201 void DisableDMA(void)
 202 {
 203         *pDMA12_CONFIG &= ~DMAEN;
 204 }
 205
 206 /* enable and disable PPI functions */
 207 void EnablePPI(void)
 208 {
 209         bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN);
 210 }
 211
 212 void DisablePPI(void)
 213 {
 214         bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN);
 215 }
 216
 217 int video_init(void *dst)
 218 {
 219         Init_Ports();
 220         Init_DMA(dst);
 221         EnableDMA();
 222         Init_PPI();
 223         EnablePPI();
 224
 225         return 0;
 226 }
 227
 228 static void dma_bitblit(void *dst, fastimage_t *logo, int x, int y)
 229 {
 230         if (dcache_status())
 231                 blackfin_dcache_flush_range(logo->data,
 232                                             logo->data + logo->size);
 233
 234         bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR);
 235
 236         /* Setup destination start address */
 237         bfin_write_MDMA_D0_START_ADDR(dst + ((x & -2) * LCD_PIXEL_SIZE)
 238                                       + (y * LCD_X_RES * LCD_PIXEL_SIZE));
 239         /* Setup destination xcount */
 240         bfin_write_MDMA_D0_X_COUNT(logo->width * LCD_PIXEL_SIZE / DMA_SIZE16);
 241         /* Setup destination xmodify */
 242         bfin_write_MDMA_D0_X_MODIFY(DMA_SIZE16);
 243
 244         /* Setup destination ycount */
 245         bfin_write_MDMA_D0_Y_COUNT(logo->height);
 246         /* Setup destination ymodify */
 247         bfin_write_MDMA_D0_Y_MODIFY((LCD_X_RES - logo->width) * LCD_PIXEL_SIZE +
 248                                     DMA_SIZE16);
 249
 250         /* Setup Source start address */
 251         bfin_write_MDMA_S0_START_ADDR(logo->data);
 252         /* Setup Source xcount */
 253         bfin_write_MDMA_S0_X_COUNT(logo->width * LCD_PIXEL_SIZE / DMA_SIZE16);
 254         /* Setup Source xmodify */
 255         bfin_write_MDMA_S0_X_MODIFY(DMA_SIZE16);
 256
 257         /* Setup Source ycount */
 258         bfin_write_MDMA_S0_Y_COUNT(logo->height);
 259         /* Setup Source ymodify */
 260         bfin_write_MDMA_S0_Y_MODIFY(DMA_SIZE16);
 261
 262         /* Enable source DMA */
 263         bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_16 | DMA2D);
 264         SSYNC();
 265         bfin_write_MDMA_D0_CONFIG(WNR | DMAEN | WDSIZE_16 | DMA2D);
 266
 267         while (bfin_read_MDMA_D0_IRQ_STATUS() & DMA_RUN) ;
 268
 269         bfin_write_MDMA_S0_IRQ_STATUS(bfin_read_MDMA_S0_IRQ_STATUS() | DMA_DONE
 270                                       | DMA_ERR);
 271         bfin_write_MDMA_D0_IRQ_STATUS(bfin_read_MDMA_D0_IRQ_STATUS() | DMA_DONE
 272                                       | DMA_ERR);
 273
 274 }
 275
 276 void video_putc(const char c)
 277 {
 278 }
 279
 280 void video_puts(const char *s)
 281 {
 282 }
 283
 284 int drv_video_init(void)
 285 {
 286         int error, devices = 1;
 287         struct stdio_dev videodev;
 288
 289         u8 *dst;
 290         u32 fbmem_size =
 291             LCD_X_RES * LCD_Y_RES * LCD_PIXEL_SIZE + ACTIVE_VIDEO_MEM_OFFSET;
 292
 293         dst = malloc(fbmem_size);
 294
 295         if (dst == NULL) {
 296                 printf("Failed to alloc FB memory\n");
 297                 return -1;
 298         }
 299 #ifdef EASYLOGO_ENABLE_GZIP
 300         unsigned char *data = EASYLOGO_DECOMP_BUFFER;
 301         unsigned long src_len = EASYLOGO_ENABLE_GZIP;
 302         if (gunzip(data, bfin_logo.size, bfin_logo.data, &src_len)) {
 303                 puts("Failed to decompress logo\n");
 304                 free(dst);
 305                 return -1;
 306         }
 307         bfin_logo.data = data;
 308 #endif
 309
 310         memset(dst + ACTIVE_VIDEO_MEM_OFFSET, bfin_logo.data[0],
 311                fbmem_size - ACTIVE_VIDEO_MEM_OFFSET);
 312
 313         dma_bitblit(dst + ACTIVE_VIDEO_MEM_OFFSET, &bfin_logo,
 314                     (LCD_X_RES - bfin_logo.width) / 2,
 315                     (LCD_Y_RES - bfin_logo.height) / 2);
 316
 317         video_init(dst);        /* Video initialization */
 318
 319         memset(&videodev, 0, sizeof(videodev));
 320
 321         strcpy(videodev.name, "video");
 322         videodev.ext = DEV_EXT_VIDEO;   /* Video extensions */
 323         videodev.flags = DEV_FLAGS_SYSTEM;      /* No Output */
 324         videodev.putc = video_putc;     /* 'putc' function */
 325         videodev.puts = video_puts;     /* 'puts' function */
 326
 327         error = stdio_register(&videodev);
 328
 329         return (error == 0) ? devices : error;
 330 }
 331
 332 #endif