diff options
Diffstat (limited to 'board/genietv')
| -rw-r--r-- | board/genietv/genietv.c | 375 |
1 files changed, 375 insertions, 0 deletions
diff --git a/board/genietv/genietv.c b/board/genietv/genietv.c new file mode 100644 index 0000000..8f32ad7 --- /dev/null +++ b/board/genietv/genietv.c @@ -0,0 +1,375 @@ +/* + * genietv/genietv.c + * + * The GENIETV is using the following physical memorymap (copied from + * the FADS configuration): + * + * ff020000 -> ff02ffff : pcmcia + * ff010000 -> ff01ffff : BCSR connected to CS1, setup by 8xxROM + * ff000000 -> ff00ffff : IMAP internal in the cpu + * 02800000 -> 0287ffff : flash connected to CS0 + * 00000000 -> nnnnnnnn : sdram setup by U-Boot + * + * CS pins are connected as follows: + * + * CS0 -512Kb boot flash + * CS1 - SDRAM #1 + * CS2 - SDRAM #2 + * CS3 - Flash #1 + * CS4 - Flash #2 + * CS5 - LON (if present) + * CS6 - PCMCIA #1 + * CS7 - PCMCIA #2 + * + * Ports are configured as follows: + * + * PA7 - SDRAM banks enable + */ + +#include <common.h> +#include <mpc8xx.h> + +#define CFG_PA7 0x0100 + +/* ------------------------------------------------------------------------- */ + +static long int dram_size (long int, long int *, long int); + +/* ------------------------------------------------------------------------- */ + +#define _NOT_USED_ 0xFFFFFFFF + +const uint sdram_table[] = +{ + /* + * Single Read. (Offset 0 in UPMB RAM) + */ + 0x1F0DFC04, 0xEEAFBC04, 0x11AF7C04, 0xEFBEEC00, + 0x1FFDDC47, /* last */ + /* + * SDRAM Initialization (offset 5 in UPMB RAM) + * + * This is no UPM entry point. The following definition uses + * the remaining space to establish an initialization + * sequence, which is executed by a RUN command. + * + */ + 0x1FFDDC34, 0xEFEEAC34, 0x1FBD5C35, /* last */ + /* + * Burst Read. (Offset 8 in UPMB RAM) + */ + 0x1F0DFC04, 0xEEAFBC04, 0x10AF7C04, 0xF0AFFC00, + 0xF0AFFC00, 0xF1AFFC00, 0xEFBEEC00, 0x1FFDDC47, /* last */ + _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, + _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, + /* + * Single Write. (Offset 18 in UPMB RAM) + */ + 0x1F2DFC04, 0xEEAFAC00, 0x01BE4C04, 0x1FFDDC47, /* last */ + _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, + /* + * Burst Write. (Offset 20 in UPMB RAM) + */ + 0x1F0DFC04, 0xEEAFAC00, 0x10AF5C00, 0xF0AFFC00, + 0xF0AFFC00, 0xE1BEEC04, 0x1FFDDC47, /* last */ + _NOT_USED_, + _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, + _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, + /* + * Refresh (Offset 30 in UPMB RAM) + */ + 0x1FFD7C84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04, + 0xFFFFFC84, 0xFFFFFC07, /* last */ + _NOT_USED_, _NOT_USED_, + _NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_, + /* + * Exception. (Offset 3c in UPMB RAM) + */ + 0x7FFFFC07, /* last */ + _NOT_USED_, _NOT_USED_, _NOT_USED_, +}; + +/* ------------------------------------------------------------------------- */ + + +/* + * Check Board Identity + */ + +int checkboard (void) +{ + puts ("Board: GenieTV\n"); + return 0; +} + +#if 0 +static void PrintState(void) +{ + volatile immap_t *im = (immap_t *)CFG_IMMR; + volatile memctl8xx_t *memctl = &im->im_memctl; + + printf("\n0 - FLASH: B=%08x O=%08x", memctl->memc_br0, memctl->memc_or0); + printf("\n1 - SDRAM: B=%08x O=%08x", memctl->memc_br1, memctl->memc_or1); + printf("\n2 - SDRAM: B=%08x O=%08x", memctl->memc_br2, memctl->memc_or2); +} +#endif + +/* ------------------------------------------------------------------------- */ + +long int initdram (int board_type) +{ + volatile immap_t *im = (immap_t *)CFG_IMMR; + volatile memctl8xx_t *memctl = &im->im_memctl; + long int size_b0, size_b1, size8; + + /* Enable SDRAM */ + + /* Configuring PA7 for general purpouse output pin */ + im->im_ioport.iop_papar &= ~CFG_PA7 ; /* 0 = general purpouse */ + im->im_ioport.iop_padir |= CFG_PA7 ; /* 1 = output */ + + /* Enable SDRAM - PA7 = 1 */ + im->im_ioport.iop_padat |= CFG_PA7 ; /* value of PA7 */ + + /* + * Preliminary prescaler for refresh (depends on number of + * banks): This value is selected for four cycles every 62.4 us + * with two SDRAM banks or four cycles every 31.2 us with one + * bank. It will be adjusted after memory sizing. + */ + memctl->memc_mptpr = CFG_MPTPR_2BK_4K ; + + memctl->memc_mbmr = CFG_MBMR_8COL; + + upmconfig(UPMB, (uint *)sdram_table, sizeof(sdram_table)/sizeof(uint)); + + /* + * Map controller banks 1 and 2 to the SDRAM banks 1 and 2 at + * preliminary addresses - these have to be modified after the + * SDRAM size has been determined. + */ + + memctl->memc_or1 = 0xF0000000 | CFG_OR_TIMING_SDRAM; + memctl->memc_br1 = ((SDRAM_BASE1_PRELIM & BR_BA_MSK) | BR_MS_UPMB | BR_V); + + memctl->memc_or2 = 0xF0000000 | CFG_OR_TIMING_SDRAM; + memctl->memc_br2 = ((SDRAM_BASE2_PRELIM & BR_BA_MSK) | BR_MS_UPMB | BR_V); + + /* perform SDRAM initialization sequence */ + memctl->memc_mar = 0x00000088; + + memctl->memc_mcr = 0x80802105; /* SDRAM bank 0 */ + + memctl->memc_mcr = 0x80804105; /* SDRAM bank 1 */ + + /* Execute refresh 8 times */ + memctl->memc_mbmr = (CFG_MBMR_8COL & ~MAMR_TLFB_MSK) | MAMR_TLFB_8X ; + + memctl->memc_mcr = 0x80802130; /* SDRAM bank 0 - execute twice */ + + memctl->memc_mcr = 0x80804130; /* SDRAM bank 1 - execute twice */ + + /* Execute refresh 4 times */ + memctl->memc_mbmr = CFG_MBMR_8COL; + + /* + * Check Bank 0 Memory Size for re-configuration + * + * try 8 column mode + */ + +#if 0 + PrintState(); +#endif +/* printf ("\nChecking bank1..."); */ + size8 = dram_size (CFG_MBMR_8COL, (ulong *)SDRAM_BASE1_PRELIM, SDRAM_MAX_SIZE); + + size_b0 = size8 ; + +/* printf ("\nChecking bank2..."); */ + size_b1 = dram_size (memctl->memc_mbmr, (ulong *)SDRAM_BASE2_PRELIM,SDRAM_MAX_SIZE); + + /* + * Final mapping: map bigger bank first + */ + + memctl->memc_or1 = ((-size_b0) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM; + memctl->memc_br1 = (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMB | BR_V; + + if (size_b1 > 0) + { + /* + * Position Bank 1 immediately above Bank 0 + */ + memctl->memc_or2 = ((-size_b1) & 0xFFFF0000) | CFG_OR_TIMING_SDRAM; + memctl->memc_br2 = ((CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMB | BR_V) + + (size_b0 & BR_BA_MSK); + } + else + { + /* + * No bank 1 + * + * invalidate bank + */ + memctl->memc_br2 = 0; + /* adjust refresh rate depending on SDRAM type, one bank */ + memctl->memc_mptpr = CFG_MPTPR_1BK_4K; + } + + /* If no memory detected, disable SDRAM */ + if ((size_b0 + size_b1) == 0) + { + printf("disabling SDRAM!\n"); + /* Disable SDRAM - PA7 = 1 */ + im->im_ioport.iop_padat &= ~CFG_PA7 ; /* value of PA7 */ + } +/* else */ +/* printf("done! (%08lx)\n", size_b0 + size_b1); */ + +#if 0 + PrintState(); +#endif + return (size_b0 + size_b1); +} + +/* ------------------------------------------------------------------------- */ + +/* + * Check memory range for valid RAM. A simple memory test determines + * the actually available RAM size between addresses `base' and + * `base + maxsize'. Some (not all) hardware errors are detected: + * - short between address lines + * - short between data lines + */ + +static long int dram_size (long int mbmr_value, long int *base, long int maxsize) +{ + volatile long int *addr; + long int cnt, val; + + /*memctl->memc_mbmr = mbmr_value; */ + + for (cnt = maxsize/sizeof(long); cnt > 0; cnt >>= 1) { + addr = base + cnt; /* pointer arith! */ + + *addr = ~cnt; + } + + /* write 0 to base address */ + addr = base; + *addr = 0; + + /* check at base address */ + if ((val = *addr) != 0) { + printf("(0)"); + return (0); + } + + for (cnt = 1; ; cnt <<= 1) { + addr = base + cnt; /* pointer arith! */ + + val = *addr; + if (val != (~cnt)) { +/* printf("(%08lx)", cnt*sizeof(long)); */ + return (cnt * sizeof(long)); + } + } + /* NOTREACHED */ + return (0); +} + +#if (CONFIG_COMMANDS & CFG_CMD_PCMCIA) + +#ifdef CFG_PCMCIA_MEM_ADDR +volatile unsigned char *pcmcia_mem = (unsigned char*)CFG_PCMCIA_MEM_ADDR; +#endif + +int pcmcia_init(void) +{ + volatile pcmconf8xx_t *pcmp; + uint v, slota, slotb; + + /* + ** Enable the PCMCIA for a Flash card. + */ + pcmp = (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia)); + +#if 0 + pcmp->pcmc_pbr0 = CFG_PCMCIA_MEM_ADDR; + pcmp->pcmc_por0 = 0xc00ff05d; +#endif + + /* Set all slots to zero by default. */ + pcmp->pcmc_pgcra = 0; + pcmp->pcmc_pgcrb = 0; +#ifdef PCMCIA_SLOT_A + pcmp->pcmc_pgcra = 0x40; +#endif +#ifdef PCMCIA_SLOT_B + pcmp->pcmc_pgcrb = 0x40; +#endif + + /* Check if any PCMCIA card is luged in. */ + slota = (pcmp->pcmc_pipr & 0x18000000) == 0 ; + slotb = (pcmp->pcmc_pipr & 0x00001800) == 0 ; + + if (!(slota || slotb)) + { + printf("No card present\n"); +#ifdef PCMCIA_SLOT_A + pcmp->pcmc_pgcra = 0; +#endif +#ifdef PCMCIA_SLOT_B + pcmp->pcmc_pgcrb = 0; +#endif + return -1; + } + else + printf("Unknown card ("); + + v = 0; + + switch( (pcmp->pcmc_pipr >> 14) & 3 ) + { + case 0x00 : + printf("5V"); + v = 5; + break; + case 0x01 : + printf("5V and 3V"); + v = 3; + break; + case 0x03 : + printf("5V, 3V and x.xV"); + v = 3; + break; + } + + switch(v){ + case 3: + printf("; using 3V"); + /* Enable 3 volt Vcc. */ + + break; + + default: + printf("; unknown voltage"); + return -1; + } + printf(")\n"); + /* disable pcmcia reset after a while */ + + udelay(20); + + pcmp->pcmc_pgcrb = 0; + + /* If you using a real hd you should give a short + * spin-up time. */ +#ifdef CONFIG_DISK_SPINUP_TIME + udelay(CONFIG_DISK_SPINUP_TIME); +#endif + + return 0; +} +#endif /* CFG_CMD_PCMCIA */ |