diff options
Diffstat (limited to 'board/tqm5200/tqm5200.c')
| -rw-r--r-- | board/tqm5200/tqm5200.c | 58 |
1 files changed, 45 insertions, 13 deletions
diff --git a/board/tqm5200/tqm5200.c b/board/tqm5200/tqm5200.c index 90275ec..6aad920 100644 --- a/board/tqm5200/tqm5200.c +++ b/board/tqm5200/tqm5200.c @@ -122,9 +122,9 @@ long int initdram (int board_type) /* find RAM size using SDRAM CS0 only */ sdram_start(0); - test1 = get_ram_size((ulong *)CFG_SDRAM_BASE, 0x20000000); + test1 = get_ram_size((long *)CFG_SDRAM_BASE, 0x20000000); sdram_start(1); - test2 = get_ram_size((ulong *)CFG_SDRAM_BASE, 0x20000000); + test2 = get_ram_size((long *)CFG_SDRAM_BASE, 0x20000000); if (test1 > test2) { sdram_start(0); dramsize = test1; @@ -150,9 +150,9 @@ long int initdram (int board_type) /* find RAM size using SDRAM CS1 only */ sdram_start(0); - test1 = get_ram_size((ulong *)(CFG_SDRAM_BASE + dramsize), 0x20000000); + test1 = get_ram_size((long *)(CFG_SDRAM_BASE + dramsize), 0x20000000); sdram_start(1); - test2 = get_ram_size((ulong *)(CFG_SDRAM_BASE + dramsize), 0x20000000); + test2 = get_ram_size((long *)(CFG_SDRAM_BASE + dramsize), 0x20000000); if (test1 > test2) { sdram_start(0); dramsize2 = test1; @@ -425,7 +425,7 @@ int last_stage_init (void) * Check for SRAM and SRAM size */ - /* save origianl SRAM content */ + /* save original SRAM content */ save = *(volatile u16 *)CFG_CS2_START; restore = 1; @@ -447,8 +447,7 @@ int last_stage_init (void) *(vu_long *)MPC5XXX_CS2_STOP = 0x0000FFFF; restore = 0; __asm__ volatile ("sync"); - } - else if (*(volatile u16 *)(CFG_CS2_START + (1<<19)) == 0xA5A5) { + } else if (*(volatile u16 *)(CFG_CS2_START + (1<<19)) == 0xA5A5) { /* make sure that we access a mirrored address */ *(volatile u16 *)CFG_CS2_START = 0x1111; __asm__ volatile ("sync"); @@ -461,8 +460,7 @@ int last_stage_init (void) } else puts ("!! possible error in SRAM detection\n"); - } - else { + } else { puts ("SRAM: 1 MB\n"); } /* restore origianl SRAM content */ @@ -497,8 +495,7 @@ int last_stage_init (void) *(vu_long *)MPC5XXX_CS1_STOP = 0x0000FFFF; restore = 0; __asm__ volatile ("sync"); - } - else { + } else { puts ("VGA: SMI501 (Voyager) with 8 MB\n"); } /* restore origianl FB content */ @@ -598,11 +595,46 @@ void video_get_info_str (int line_number, char *info) #endif /* - * Returns SM501 register base address. First thing called in the driver. + * Returns SM501 register base address. First thing called in the + * driver. Checks if SM501 is physically present. */ unsigned int board_video_init (void) { - return SM501_MMIO_BASE; + u16 save, tmp; + int restore, ret; + + /* + * Check for Grafic Controller + */ + + /* save origianl FB content */ + save = *(volatile u16 *)CFG_CS1_START; + restore = 1; + + /* write test pattern to FB memory */ + *(volatile u16 *)CFG_CS1_START = 0xA5A5; + __asm__ volatile ("sync"); + /* + * Put a different pattern on the data lines: otherwise they may float + * long enough to read back what we wrote. + */ + tmp = *(volatile u16 *)CFG_FLASH_BASE; + if (tmp == 0xA5A5) + puts ("!! possible error in grafic controller detection\n"); + + if (*(volatile u16 *)CFG_CS1_START != 0xA5A5) { + /* no grafic controller found */ + restore = 0; + ret = 0; + } else { + ret = SM501_MMIO_BASE; + } + + if (restore) { + *(volatile u16 *)CFG_CS1_START = save; + __asm__ volatile ("sync"); + } + return ret; } /* |