arch/powerpc/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/fsl_diu_fb.h"
  31
  32 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
  33 #include <stdio_dev.h>
  34 #include <video_fb.h>
  35 #endif
  36
  37 DECLARE_GLOBAL_DATA_PTR;
  38
  39 #ifdef CONFIG_FSL_DIU_LOGO_BMP
  40 extern unsigned int FSL_Logo_BMP[];
  41 #else
  42 #define FSL_Logo_BMP NULL
  43 #endif
  44
  45 static int xres, yres;
  46
  47 void diu_set_pixel_clock(unsigned int pixclock)
  48 {
  49         volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
  50         volatile clk512x_t *clk = &immap->clk;
  51         volatile unsigned int *clkdvdr = &clk->scfr[0];
  52         unsigned long speed_ccb, temp, pixval;
  53
  54         speed_ccb = get_bus_freq(0) * 4;
  55         temp = 1000000000/pixclock;
  56         temp *= 1000;
  57         pixval = speed_ccb / temp;
  58         debug("DIU pixval = %lu\n", pixval);
  59
  60         /* Modify PXCLK in GUTS CLKDVDR */
  61         debug("DIU: Current value of CLKDVDR = 0x%08x\n", in_be32(clkdvdr));
  62         temp = in_be32(clkdvdr) & 0xFFFFFF00;
  63         out_be32(clkdvdr, temp | (pixval & 0xFF));
  64         debug("DIU: Modified value of CLKDVDR = 0x%08x\n", in_be32(clkdvdr));
  65 }
  66
  67 char *valid_bmp(char *addr)
  68 {
  69         unsigned long h_addr;
  70         bd_t *bd = gd->bd;
  71
  72         h_addr = simple_strtoul(addr, NULL, 16);
  73         if (h_addr < bd->bi_flashstart ||
  74             h_addr >= (bd->bi_flashstart + bd->bi_flashsize - 1)) {
  75                 printf("bmp addr %lx is not a valid flash address\n", h_addr);
  76                 return 0;
  77         } else if ((*(char *)(h_addr) != 'B') || (*(char *)(h_addr+1) != 'M')) {
  78                 printf("bmp addr is not a bmp\n");
  79                 return 0;
  80         } else
  81                 return (char *)h_addr;
  82 }
  83
  84 int mpc5121_diu_init(void)
  85 {
  86         unsigned int pixel_format;
  87         char *bmp = NULL;
  88         char *bmp_env;
  89
  90 #if defined(CONFIG_VIDEO_XRES) & defined(CONFIG_VIDEO_YRES)
  91         xres = CONFIG_VIDEO_XRES;
  92         yres = CONFIG_VIDEO_YRES;
  93 #else
  94         xres = 1024;
  95         yres = 768;
  96 #endif
  97         pixel_format = 0x88883316;
  98
  99         debug("mpc5121_diu_init\n");
 100         bmp_env = getenv("diu_bmp_addr");
 101         if (bmp_env) {
 102                 bmp = valid_bmp(bmp_env);
 103         }
 104         if (!bmp)
 105                 bmp = (char *)FSL_Logo_BMP;
 106         return fsl_diu_init(xres, pixel_format, 0, (unsigned char *)bmp);
 107 }
 108
 109 int mpc5121diu_init_show_bmp(cmd_tbl_t *cmdtp,
 110                              int flag, int argc, char *argv[])
 111 {
 112         unsigned int addr;
 113
 114         if (argc < 2) {
 115                 cmd_usage(cmdtp);
 116                 return 1;
 117         }
 118
 119         if (!strncmp(argv[1], "init", 4)) {
 120 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
 121                 fsl_diu_clear_screen();
 122                 drv_video_init();
 123 #else
 124                 return mpc5121_diu_init();
 125 #endif
 126         } else {
 127                 addr = simple_strtoul(argv[1], NULL, 16);
 128                 fsl_diu_clear_screen();
 129                 fsl_diu_display_bmp((unsigned char *)addr, 0, 0, 0);
 130         }
 131
 132         return 0;
 133 }
 134
 135 U_BOOT_CMD(
 136         diufb, CONFIG_SYS_MAXARGS, 1, mpc5121diu_init_show_bmp,
 137         "Init or Display BMP file",
 138         "init\n    - initialize DIU\n"
 139         "addr\n    - display bmp at address 'addr'"
 140         );
 141
 142
 143 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
 144
 145 /*
 146  * The Graphic Device
 147  */
 148 GraphicDevice ctfb;
 149 void *video_hw_init(void)
 150 {
 151         GraphicDevice *pGD = (GraphicDevice *) &ctfb;
 152         struct fb_info *info;
 153
 154         if (mpc5121_diu_init() < 0)
 155                 return NULL;
 156
 157         /* fill in Graphic device struct */
 158         sprintf(pGD->modeIdent, "%dx%dx%d %dkHz %dHz",
 159                 xres, yres, 32, 64, 60);
 160
 161         pGD->frameAdrs = (unsigned int)fsl_fb_open(&info);
 162         pGD->winSizeX = xres;
 163         pGD->winSizeY = yres - info->logo_height;
 164         pGD->plnSizeX = pGD->winSizeX;
 165         pGD->plnSizeY = pGD->winSizeY;
 166
 167         pGD->gdfBytesPP = 4;
 168         pGD->gdfIndex = GDF_32BIT_X888RGB;
 169
 170         pGD->isaBase = 0;
 171         pGD->pciBase = 0;
 172         pGD->memSize = info->screen_size - info->logo_size;
 173
 174         /* Cursor Start Address */
 175         pGD->dprBase = 0;
 176         pGD->vprBase = 0;
 177         pGD->cprBase = 0;
 178
 179         return (void *)pGD;
 180 }
 181
 182 #endif /* defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE) */