u-boot/board/genietv/genietv.c
2005-10-13 16:45:02 +02:00

360 lines
8.3 KiB
C

/*
* 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 & ~MBMR_TLFB_MSK) | MBMR_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, (long *) SDRAM_BASE1_PRELIM,
SDRAM_MAX_SIZE);
size_b0 = size8;
/* printf ("\nChecking bank2..."); */
size_b1 =
dram_size (memctl->memc_mbmr, (long *) 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)
{
long size;
/*memctl->memc_mbmr = mbmr_value; */
size = get_ram_size (base, maxsize);
if (size) {
/* printf("(%08lx)", size); */
} else {
printf ("(0)");
}
return (size);
}
#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 */