arch/ppc/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 #ifdef CONFIG_FSL_DIU_LOGO_BMP
  38 extern unsigned int FSL_Logo_BMP[];
  39 #else
  40 #define FSL_Logo_BMP NULL
  41 #endif
  42
  43 static int xres, yres;
  44
  45 void diu_set_pixel_clock(unsigned int pixclock)
  46 {
  47         volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
  48         volatile clk512x_t *clk = &immap->clk;
  49         volatile unsigned int *clkdvdr = &clk->scfr[0];
  50         unsigned long speed_ccb, temp, pixval;
  51
  52         speed_ccb = get_bus_freq(0) * 4;
  53         temp = 1000000000/pixclock;
  54         temp *= 1000;
  55         pixval = speed_ccb / temp;
  56         debug("DIU pixval = %lu\n", pixval);
  57
  58         /* Modify PXCLK in GUTS CLKDVDR */
  59         debug("DIU: Current value of CLKDVDR = 0x%08x\n", in_be32(clkdvdr));
  60         temp = in_be32(clkdvdr) & 0xFFFFFF00;
  61         out_be32(clkdvdr, temp | (pixval & 0xFF));
  62         debug("DIU: Modified value of CLKDVDR = 0x%08x\n", in_be32(clkdvdr));
  63 }
  64
  65 char *valid_bmp(char *addr)
  66 {
  67         unsigned long h_addr;
  68
  69         h_addr = simple_strtoul(addr, NULL, 16);
  70         if (h_addr < CONFIG_SYS_FLASH_BASE ||
  71                         h_addr >= (CONFIG_SYS_FLASH_BASE + CONFIG_SYS_FLASH_SIZE - 1)) {
  72                 printf("bmp addr %lx is not a valid flash address\n", h_addr);
  73                 return 0;
  74         } else if ((*(char *)(h_addr) != 'B') || (*(char *)(h_addr+1) != 'M')) {
  75                 printf("bmp addr is not a bmp\n");
  76                 return 0;
  77         } else
  78                 return (char *)h_addr;
  79 }
  80
  81 int mpc5121_diu_init(void)
  82 {
  83         unsigned int pixel_format;
  84         char *bmp = NULL;
  85         char *bmp_env;
  86
  87         xres = 1024;
  88         yres = 768;
  89         pixel_format = 0x88883316;
  90
  91         debug("mpc5121_diu_init\n");
  92         bmp_env = getenv("diu_bmp_addr");
  93         if (bmp_env) {
  94                 bmp = valid_bmp(bmp_env);
  95         }
  96         if (!bmp)
  97                 bmp = (char *)FSL_Logo_BMP;
  98         return fsl_diu_init(xres, pixel_format, 0, (unsigned char *)bmp);
  99 }
 100
 101 int mpc5121diu_init_show_bmp(cmd_tbl_t *cmdtp,
 102                              int flag, int argc, char *argv[])
 103 {
 104         unsigned int addr;
 105
 106         if (argc < 2) {
 107                 cmd_usage(cmdtp);
 108                 return 1;
 109         }
 110
 111         if (!strncmp(argv[1], "init", 4)) {
 112 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
 113                 fsl_diu_clear_screen();
 114                 drv_video_init();
 115 #else
 116                 return mpc5121_diu_init();
 117 #endif
 118         } else {
 119                 addr = simple_strtoul(argv[1], NULL, 16);
 120                 fsl_diu_clear_screen();
 121                 fsl_diu_display_bmp((unsigned char *)addr, 0, 0, 0);
 122         }
 123
 124         return 0;
 125 }
 126
 127 U_BOOT_CMD(
 128         diufb, CONFIG_SYS_MAXARGS, 1, mpc5121diu_init_show_bmp,
 129         "Init or Display BMP file",
 130         "init\n    - initialize DIU\n"
 131         "addr\n    - display bmp at address 'addr'"
 132         );
 133
 134
 135 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
 136
 137 /*
 138  * The Graphic Device
 139  */
 140 GraphicDevice ctfb;
 141 void *video_hw_init(void)
 142 {
 143         GraphicDevice *pGD = (GraphicDevice *) &ctfb;
 144         struct fb_info *info;
 145
 146         if (mpc5121_diu_init() < 0)
 147                 return NULL;
 148
 149         /* fill in Graphic device struct */
 150         sprintf(pGD->modeIdent, "%dx%dx%d %dkHz %dHz",
 151                 xres, yres, 32, 64, 60);
 152
 153         pGD->frameAdrs = (unsigned int)fsl_fb_open(&info);
 154         pGD->winSizeX = xres;
 155         pGD->winSizeY = yres - info->logo_height;
 156         pGD->plnSizeX = pGD->winSizeX;
 157         pGD->plnSizeY = pGD->winSizeY;
 158
 159         pGD->gdfBytesPP = 4;
 160         pGD->gdfIndex = GDF_32BIT_X888RGB;
 161
 162         pGD->isaBase = 0;
 163         pGD->pciBase = 0;
 164         pGD->memSize = info->screen_size - info->logo_size;
 165
 166         /* Cursor Start Address */
 167         pGD->dprBase = 0;
 168         pGD->vprBase = 0;
 169         pGD->cprBase = 0;
 170
 171         return (void *)pGD;
 172 }
 173
 174 /**
 175   * Set the LUT
 176   *
 177   * @index: color number
 178   * @r: red
 179   * @b: blue
 180   * @g: green
 181   */
 182 void video_set_lut
 183         (unsigned int index, unsigned char r, unsigned char g, unsigned char b)
 184 {
 185         return;
 186 }
 187
 188 #endif /* defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE) */