diff options
Diffstat (limited to 'board/exbitgen/exbitgen.c')
| -rw-r--r-- | board/exbitgen/exbitgen.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/board/exbitgen/exbitgen.c b/board/exbitgen/exbitgen.c new file mode 100644 index 0000000..f2cd8ca --- /dev/null +++ b/board/exbitgen/exbitgen.c @@ -0,0 +1,117 @@ +#include <asm/u-boot.h> +#include <asm/processor.h> +#include <common.h> +#include "exbitgen.h" + +/* ************************************************************************ */ +int board_pre_init (void) +/* ------------------------------------------------------------------------ -- + * Purpose : + * Remarks : + * Restrictions: + * See also : + * Example : + * ************************************************************************ */ +{ + unsigned long i; + + /*-------------------------------------------------------------------------+ + | Interrupt controller setup for the Walnut board. + | Note: IRQ 0-15 405GP internally generated; active high; level sensitive + | IRQ 16 405GP internally generated; active low; level sensitive + | IRQ 17-24 RESERVED + | IRQ 25 (EXT IRQ 0) FPGA; active high; level sensitive + | IRQ 26 (EXT IRQ 1) SMI; active high; level sensitive + | IRQ 27 (EXT IRQ 2) Not Used + | IRQ 28 (EXT IRQ 3) PCI SLOT 3; active low; level sensitive + | IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive + | IRQ 30 (EXT IRQ 5) PCI SLOT 1; active low; level sensitive + | IRQ 31 (EXT IRQ 6) PCI SLOT 0; active low; level sensitive + | Note for Walnut board: + | An interrupt taken for the FPGA (IRQ 25) indicates that either + | the Mouse, Keyboard, IRDA, or External Expansion caused the + | interrupt. The FPGA must be read to determine which device + | caused the interrupt. The default setting of the FPGA clears + | + +-------------------------------------------------------------------------*/ + + mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */ + mtdcr (uicer, 0x00000000); /* disable all ints */ + mtdcr (uiccr, 0x00000020); /* set all but FPGA SMI to be non-critical */ + mtdcr (uicpr, 0xFFFFFF90); /* set int polarities */ + mtdcr (uictr, 0x10000000); /* set int trigger levels */ + mtdcr (uicvcr, 0x00000001); /* set vect base=0,INT0 highest priority */ + mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */ + + /* Perform reset of PHY connected to PPC via register in CPLD */ + out8 (PHY_CTRL_ADDR, 0x2e); /* activate nRESET,FDX,F100,ANEN, enable output */ + for (i = 0; i < 10000000; i++) { + ; + } + out8 (PHY_CTRL_ADDR, 0x2f); /* deactivate nRESET */ + + return 0; +} + + +/* ************************************************************************ */ +int checkboard (void) +/* ------------------------------------------------------------------------ -- + * Purpose : + * Remarks : + * Restrictions: + * See also : + * Example : + * ************************************************************************ */ +{ + printf ("Exbit H/W id: %d\n", in8 (HW_ID_ADDR)); + return (0); +} + +/* ************************************************************************ */ +long int initdram (int board_type) +/* ------------------------------------------------------------------------ -- + * Purpose : Determines size of mounted DRAM. + * Remarks : Size is determined by reading SDRAM configuration registers as + * set up by sdram_init. + * Restrictions: + * See also : + * Example : + * ************************************************************************ */ +{ + ulong tot_size; + ulong bank_size; + ulong tmp; + + tot_size = 0; + + mtdcr (memcfga, mem_mb0cf); + tmp = mfdcr (memcfgd); + if (tmp & 0x00000001) { + bank_size = 0x00400000 << ((tmp >> 17) & 0x7); + tot_size += bank_size; + } + + mtdcr (memcfga, mem_mb1cf); + tmp = mfdcr (memcfgd); + if (tmp & 0x00000001) { + bank_size = 0x00400000 << ((tmp >> 17) & 0x7); + tot_size += bank_size; + } + + mtdcr (memcfga, mem_mb2cf); + tmp = mfdcr (memcfgd); + if (tmp & 0x00000001) { + bank_size = 0x00400000 << ((tmp >> 17) & 0x7); + tot_size += bank_size; + } + + mtdcr (memcfga, mem_mb3cf); + tmp = mfdcr (memcfgd); + if (tmp & 0x00000001) { + bank_size = 0x00400000 << ((tmp >> 17) & 0x7); + tot_size += bank_size; + } + + return tot_size; +} |