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ppc4xx: Yosemite/Yellowstone: Check and reconfigure the PCI sync clock

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This patch now uses the 440EP(x)/GR(x) function to check and dynamically
reconfigure the PCI sync clock.

Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Stefan Roese 2009-10-19 14:14:08 +02:00
parent 23c51a2d63
commit c85b583970
1 changed files with 23 additions and 3 deletions
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26
board/amcc/yosemite/yosemite.c
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@ -33,6 +33,15 @@ DECLARE_GLOBAL_DATA_PTR;
extern flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
static inline u32 get_async_pci_freq(void)
{
if (in_8((void *)(CONFIG_SYS_BCSR_BASE + 5)) &
CONFIG_SYS_BCSR5_PCI66EN)
return 66666666;
else
return 33333333;
}
int board_early_init_f(void)
{
register uint reg;
@ -106,6 +115,9 @@ int board_early_init_f(void)
mtsdr(SDR0_PFC0, 0x00003e00); /* Pin function */
mtsdr(SDR0_PFC1, 0x00048000); /* Pin function: UART0 has 4 pins */
/* Check and reconfigure the PCI sync clock if necessary */
ppc4xx_pci_sync_clock_config(get_async_pci_freq());
/*clear tmrclk divisor */
*(unsigned char *)(CONFIG_SYS_BCSR_BASE | 0x04) = 0x00;
@ -178,7 +190,7 @@ int checkboard(void)
{
char *s = getenv("serial#");
u8 rev;
u8 val;
u32 clock = get_async_pci_freq();
#ifdef CONFIG_440EP
printf("Board: Yosemite - AMCC PPC440EP Evaluation Board");
@ -187,8 +199,7 @@ int checkboard(void)
#endif
rev = in_8((void *)(CONFIG_SYS_BCSR_BASE + 0));
val = in_8((void *)(CONFIG_SYS_BCSR_BASE + 5)) & CONFIG_SYS_BCSR5_PCI66EN;
printf(", Rev. %X, PCI=%d MHz", rev, val ? 66 : 33);
printf(", Rev. %X, PCI-Async=%d MHz", rev, clock / 1000000);
if (s != NULL) {
puts(", serial# ");
@ -196,6 +207,15 @@ int checkboard(void)
}
putc('\n');
/*
* Reconfiguration of the PCI sync clock is already done,
* now check again if everything is in range:
*/
if (ppc4xx_pci_sync_clock_config(clock)) {
printf("ERROR: PCI clocking incorrect (async=%d "
"sync=%ld)!\n", clock, get_PCI_freq());
}
return (0);
}