drivers/video/sm501.c

   1 /*
   2  * (C) Copyright 2002
   3  * Stäubli Faverges - <www.staubli.com>
   4  * Pierre AUBERT  p.aubert@staubli.com
   5  *
   6  * (C) Copyright 2005
   7  * Martin Krause TQ-Systems GmbH martin.krause@tqs.de
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 /*
  29  * Basic video support for SMI SM501 "Voyager" graphic controller
  30  */
  31
  32 #include <common.h>
  33
  34 #include <asm/io.h>
  35 #include <video_fb.h>
  36 #include <sm501.h>
  37
  38 #define read8(ptrReg)                \
  39     *(volatile unsigned char *)(sm501.isaBase + ptrReg)
  40
  41 #define write8(ptrReg,value) \
  42     *(volatile unsigned char *)(sm501.isaBase + ptrReg) = value
  43
  44 #define read16(ptrReg) \
  45     (*(volatile unsigned short *)(sm501.isaBase + ptrReg))
  46
  47 #define write16(ptrReg,value) \
  48     (*(volatile unsigned short *)(sm501.isaBase + ptrReg) = value)
  49
  50 #define read32(ptrReg) \
  51     (*(volatile unsigned int *)(sm501.isaBase + ptrReg))
  52
  53 #define write32(ptrReg, value) \
  54     (*(volatile unsigned int *)(sm501.isaBase + ptrReg) = value)
  55
  56 GraphicDevice sm501;
  57
  58 void write_be32(int off, unsigned int val)
  59 {
  60         out_be32((unsigned __iomem *)(sm501.isaBase + off), val);
  61 }
  62
  63 void write_le32(int off, unsigned int val)
  64 {
  65         out_le32((unsigned __iomem *)(sm501.isaBase + off), val);
  66 }
  67
  68 void (*write_reg32)(int off, unsigned int val) = write_be32;
  69
  70 /*-----------------------------------------------------------------------------
  71  * SmiSetRegs --
  72  *-----------------------------------------------------------------------------
  73  */
  74 static void SmiSetRegs (void)
  75 {
  76         /*
  77          * The content of the chipset register depends on the board (clocks,
  78          * ...)
  79          */
  80         const SMI_REGS *preg = board_get_regs ();
  81         while (preg->Index) {
  82                 write_reg32 (preg->Index, preg->Value);
  83                 /*
  84                  * Insert a delay between
  85                  */
  86                 udelay (1000);
  87                 preg ++;
  88         }
  89 }
  90
  91 #ifdef CONFIG_VIDEO_SM501_PCI
  92 static struct pci_device_id sm501_pci_tbl[] = {
  93         { PCI_VENDOR_ID_SMI, PCI_DEVICE_ID_SMI_501 },
  94         {}
  95 };
  96 #endif
  97
  98 /*
  99  * We do not enforce board code to provide empty/unused
 100  * functions for this driver and define weak default
 101  * functions here.
 102  */
 103 unsigned int __board_video_init (void)
 104 {
 105         return 0;
 106 }
 107
 108 unsigned int board_video_init (void)
 109                         __attribute__((weak, alias("__board_video_init")));
 110
 111 unsigned int __board_video_get_fb (void)
 112 {
 113         return 0;
 114 }
 115
 116 unsigned int board_video_get_fb (void)
 117                         __attribute__((weak, alias("__board_video_get_fb")));
 118
 119 void __board_validate_screen (unsigned int base)
 120 {
 121 }
 122
 123 void board_validate_screen (unsigned int base)
 124                         __attribute__((weak, alias("__board_validate_screen")));
 125
 126 /*-----------------------------------------------------------------------------
 127  * video_hw_init --
 128  *-----------------------------------------------------------------------------
 129  */
 130 void *video_hw_init (void)
 131 {
 132 #ifdef CONFIG_VIDEO_SM501_PCI
 133         unsigned int pci_mem_base, pci_mmio_base;
 134         unsigned int id;
 135         unsigned short device_id;
 136         pci_dev_t devbusfn;
 137         int mem;
 138 #endif
 139         unsigned int *vm, i;
 140
 141         memset (&sm501, 0, sizeof (GraphicDevice));
 142
 143 #ifdef CONFIG_VIDEO_SM501_PCI
 144         printf("Video: ");
 145
 146         /* Look for SM501/SM502 chips */
 147         devbusfn = pci_find_devices(sm501_pci_tbl, 0);
 148         if (devbusfn < 0) {
 149                 printf ("PCI Controller not found.\n");
 150                 goto not_pci;
 151         }
 152
 153         /* Setup */
 154         pci_write_config_dword (devbusfn, PCI_COMMAND,
 155                                 (PCI_COMMAND_MEMORY | PCI_COMMAND_IO));
 156         pci_read_config_word (devbusfn, PCI_DEVICE_ID, &device_id);
 157         pci_read_config_dword (devbusfn, PCI_REVISION_ID, &id);
 158         pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_0, &pci_mem_base);
 159         pci_read_config_dword (devbusfn, PCI_BASE_ADDRESS_1, &pci_mmio_base);
 160         sm501.frameAdrs = pci_mem_to_phys (devbusfn, pci_mem_base);
 161         sm501.isaBase = pci_mem_to_phys (devbusfn, pci_mmio_base);
 162
 163         if (sm501.isaBase)
 164                 write_reg32 = write_le32;
 165
 166         mem = in_le32 ((unsigned __iomem *)(sm501.isaBase + 0x10));
 167         mem = (mem & 0x0000e000) >> 13;
 168         switch (mem) {
 169         case 1:
 170                 mem = 8;
 171                 break;
 172         case 2:
 173                 mem = 16;
 174                 break;
 175         case 3:
 176                 mem = 32;
 177                 break;
 178         case 4:
 179                 mem = 64;
 180                 break;
 181         case 5:
 182                 mem = 2;
 183                 break;
 184         case 0:
 185         default:
 186                 mem = 4;
 187         }
 188         printf ("PCI SM50%d %d MB\n", ((id & 0xff) == 0xC0) ? 2 : 1, mem);
 189 not_pci:
 190 #endif
 191         /*
 192          * Initialization of the access to the graphic chipset Retreive base
 193          * address of the chipset (see board/RPXClassic/eccx.c)
 194          */
 195         if (!sm501.isaBase) {
 196                 sm501.isaBase = board_video_init ();
 197                 if (!sm501.isaBase)
 198                         return NULL;
 199         }
 200
 201         if (!sm501.frameAdrs) {
 202                 sm501.frameAdrs = board_video_get_fb ();
 203                 if (!sm501.frameAdrs)
 204                         return NULL;
 205         }
 206
 207         sm501.winSizeX = board_get_width ();
 208         sm501.winSizeY = board_get_height ();
 209
 210 #if defined(CONFIG_VIDEO_SM501_8BPP)
 211         sm501.gdfIndex = GDF__8BIT_INDEX;
 212         sm501.gdfBytesPP = 1;
 213
 214 #elif defined(CONFIG_VIDEO_SM501_16BPP)
 215         sm501.gdfIndex = GDF_16BIT_565RGB;
 216         sm501.gdfBytesPP = 2;
 217
 218 #elif defined(CONFIG_VIDEO_SM501_32BPP)
 219         sm501.gdfIndex = GDF_32BIT_X888RGB;
 220         sm501.gdfBytesPP = 4;
 221 #else
 222 #error Unsupported SM501 BPP
 223 #endif
 224
 225         sm501.memSize = sm501.winSizeX * sm501.winSizeY * sm501.gdfBytesPP;
 226
 227         /* Load Smi registers */
 228         SmiSetRegs ();
 229
 230         /* (see board/RPXClassic/RPXClassic.c) */
 231         board_validate_screen (sm501.isaBase);
 232
 233         /* Clear video memory */
 234         i = sm501.memSize/4;
 235         vm = (unsigned int *)sm501.frameAdrs;
 236         while(i--)
 237                 *vm++ = 0;
 238
 239         return (&sm501);
 240 }