cpu/mpc512x/diu.c

   1 /*
   2  * Copyright 2008 Freescale Semiconductor, Inc.
   3  * York Sun <yorksun@freescale.com>
   4  *
   5  * FSL DIU Framebuffer driver
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25
  26 #include <common.h>
  27 #include <command.h>
  28 #include <asm/io.h>
  29
  30 #include "../../board/freescale/common/pixis.h"
  31 #include "../../board/freescale/common/fsl_diu_fb.h"
  32
  33 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
  34 #include <stdio_dev.h>
  35 #include <video_fb.h>
  36 #endif
  37
  38 #ifdef CONFIG_FSL_DIU_LOGO_BMP
  39 extern unsigned int FSL_Logo_BMP[];
  40 #else
  41 #define FSL_Logo_BMP NULL
  42 #endif
  43
  44 static int xres, yres;
  45
  46 void diu_set_pixel_clock(unsigned int pixclock)
  47 {
  48         volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
  49         volatile clk512x_t *clk = &immap->clk;
  50         volatile unsigned int *clkdvdr = &clk->scfr[0];
  51         unsigned long speed_ccb, temp, pixval;
  52
  53         speed_ccb = get_bus_freq(0) * 4;
  54         temp = 1000000000/pixclock;
  55         temp *= 1000;
  56         pixval = speed_ccb / temp;
  57         debug("DIU pixval = %lu\n", pixval);
  58
  59         /* Modify PXCLK in GUTS CLKDVDR */
  60         debug("DIU: Current value of CLKDVDR = 0x%08x\n", *clkdvdr);
  61         temp = *clkdvdr & 0xFFFFFF00;
  62         *clkdvdr = temp | (pixval & 0xFF);
  63         debug("DIU: Modified value of CLKDVDR = 0x%08x\n", *clkdvdr);
  64 }
  65
  66 char *valid_bmp(char *addr)
  67 {
  68         unsigned long h_addr;
  69
  70         h_addr = simple_strtoul(addr, NULL, 16);
  71         if (h_addr < CONFIG_SYS_FLASH_BASE ||
  72                         h_addr >= (CONFIG_SYS_FLASH_BASE + CONFIG_SYS_FLASH_SIZE - 1)) {
  73                 printf("bmp addr %lx is not a valid flash address\n", h_addr);
  74                 return 0;
  75         } else if ((*(char *)(h_addr) != 'B') || (*(char *)(h_addr+1) != 'M')) {
  76                 printf("bmp addr is not a bmp\n");
  77                 return 0;
  78         } else
  79                 return (char *)h_addr;
  80 }
  81
  82 int mpc5121_diu_init(void)
  83 {
  84         unsigned int pixel_format;
  85         char *bmp = NULL;
  86         char *bmp_env;
  87
  88         xres = 1024;
  89         yres = 768;
  90         pixel_format = 0x88883316;
  91
  92         debug("mpc5121_diu_init\n");
  93         bmp_env = getenv("diu_bmp_addr");
  94         if (bmp_env) {
  95                 bmp = valid_bmp(bmp_env);
  96         }
  97         if (!bmp)
  98                 bmp = (char *)FSL_Logo_BMP;
  99         return fsl_diu_init(xres, pixel_format, 0, (unsigned char *)bmp);
 100 }
 101
 102 int mpc5121diu_init_show_bmp(cmd_tbl_t *cmdtp,
 103                              int flag, int argc, char *argv[])
 104 {
 105         unsigned int addr;
 106
 107         if (argc < 2) {
 108                 cmd_usage(cmdtp);
 109                 return 1;
 110         }
 111
 112         if (!strncmp(argv[1], "init", 4)) {
 113 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
 114                 fsl_diu_clear_screen();
 115                 drv_video_init();
 116 #else
 117                 return mpc5121_diu_init();
 118 #endif
 119         } else {
 120                 addr = simple_strtoul(argv[1], NULL, 16);
 121                 fsl_diu_clear_screen();
 122                 fsl_diu_display_bmp((unsigned char *)addr, 0, 0, 0);
 123         }
 124
 125         return 0;
 126 }
 127
 128 U_BOOT_CMD(
 129         diufb, CONFIG_SYS_MAXARGS, 1, mpc5121diu_init_show_bmp,
 130         "Init or Display BMP file",
 131         "init\n    - initialize DIU\n"
 132         "addr\n    - display bmp at address 'addr'"
 133         );
 134
 135
 136 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
 137
 138 /*
 139  * The Graphic Device
 140  */
 141 GraphicDevice ctfb;
 142 void *video_hw_init(void)
 143 {
 144         GraphicDevice *pGD = (GraphicDevice *) &ctfb;
 145         struct fb_info *info;
 146
 147         if (mpc5121_diu_init() < 0)
 148                 return;
 149
 150         /* fill in Graphic device struct */
 151         sprintf(pGD->modeIdent, "%dx%dx%d %ldkHz %ldHz",
 152                 xres, yres, 32, 64, 60);
 153
 154         pGD->frameAdrs = (unsigned int)fsl_fb_open(&info);
 155         pGD->winSizeX = xres;
 156         pGD->winSizeY = yres - info->logo_height;
 157         pGD->plnSizeX = pGD->winSizeX;
 158         pGD->plnSizeY = pGD->winSizeY;
 159
 160         pGD->gdfBytesPP = 4;
 161         pGD->gdfIndex = GDF_32BIT_X888RGB;
 162
 163         pGD->isaBase = 0;
 164         pGD->pciBase = 0;
 165         pGD->memSize = info->screen_size - info->logo_size;
 166
 167         /* Cursor Start Address */
 168         pGD->dprBase = 0;
 169         pGD->vprBase = 0;
 170         pGD->cprBase = 0;
 171
 172         return (void *)pGD;
 173 }
 174
 175 /**
 176   * Set the LUT
 177   *
 178   * @index: color number
 179   * @r: red
 180   * @b: blue
 181   * @g: green
 182   */
 183 void video_set_lut
 184         (unsigned int index, unsigned char r, unsigned char g, unsigned char b)
 185 {
 186         return;
 187 }
 188
 189 #endif /* defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE) */