Wolfgang,
This is a new patch that relaxes the timing constraints of the MPC85xxCDS based flash parts to allow for the faster parts being shipped on newer board revs.
Thanks, jdl
* Patch by Jon Loeliger, Kumar Gala, 2005-02-08 - For MPC85xxCDS: Adds Relaxed Timing TRLX bit to FLASH ORx regs to allow for faster flash parts. Add documentation for BR/OR for FLASH.
diff -Nur --exclude=CVS u-boot/include/configs/MPC8541CDS.h u-boot-pq3/include/configs/MPC8541CDS.h --- u-boot/include/configs/MPC8541CDS.h 2005-02-02 15:58:50.000000000 -0600 +++ u-boot-pq3/include/configs/MPC8541CDS.h 2005-02-01 13:17:15.000000000 -0600 @@ -94,18 +95,50 @@ #error ("CONFIG_SPD_EEPROM is required by MPC85555CDS") #endif
+#undef CONFIG_CLOCKS_IN_MHZ + + /* - * SDRAM on the Local Bus + * Local Bus Definitions */ -#define CFG_LBC_SDRAM_BASE 0xf0000000 /* Localbus SDRAM */ -#define CFG_LBC_SDRAM_SIZE 64 /* LBC SDRAM is 64MB */ + +/* + * FLASH on the Local Bus + * Two banks, 8M each, using the CFI driver. + * Boot from BR0/OR0 bank at 0xff00_0000 + * Alternate BR1/OR1 bank at 0xff80_0000 + * + * BR0, BR1: + * Base address 0 = 0xff00_0000 = BR0[0:16] = 1111 1111 0000 0000 0 + * Base address 1 = 0xff80_0000 = BR1[0:16] = 1111 1111 1000 0000 0 + * Port Size = 16 bits = BRx[19:20] = 10 + * Use GPCM = BRx[24:26] = 000 + * Valid = BRx[31] = 1 + * + * 0 4 8 12 16 20 24 28 + * 1111 1111 1000 0000 0001 0000 0000 0001 = ff801001 BR0 + * 1111 1111 0000 0000 0001 0000 0000 0001 = ff001001 BR1 + * + * OR0, OR1: + * Addr Mask = 8M = ORx[0:16] = 1111 1111 1000 0000 0 + * Reserved ORx[17:18] = 11, confusion here? + * CSNT = ORx[20] = 1 + * ACS = half cycle delay = ORx[21:22] = 11 + * SCY = 6 = ORx[24:27] = 0110 + * TRLX = use relaxed timing = ORx[29] = 1 + * EAD = use external address latch delay = OR[31] = 1 + * + * 0 4 8 12 16 20 24 28 + * 1111 1111 1000 0000 0110 1110 0110 0101 = ff806e65 ORx + */ + #define CFG_FLASH_BASE 0xff000000 /* start of FLASH 8M */
-#define CFG_BR0_PRELIM 0xff801001 /* port size 16bit */ -#define CFG_BR1_PRELIM 0xff001001 /* port size 16bit */ +#define CFG_BR0_PRELIM 0xff801001 +#define CFG_BR1_PRELIM 0xff001001
-#define CFG_OR0_PRELIM 0xff806e61 /* 8MB Flash */ -#define CFG_OR1_PRELIM 0xff806e61 /* 8MB Flash */ +#define CFG_OR0_PRELIM 0xff806e65 +#define CFG_OR1_PRELIM 0xff806e65
#define CFG_FLASH_BANKS_LIST {0xff800000, CFG_FLASH_BASE} #define CFG_MAX_FLASH_BANKS 2 /* number of banks */ @@ -120,11 +153,12 @@ #define CFG_FLASH_CFI #define CFG_FLASH_EMPTY_INFO
-#undef CONFIG_CLOCKS_IN_MHZ
/* - * Local Bus Definitions + * SDRAM on the Local Bus */ +#define CFG_LBC_SDRAM_BASE 0xf0000000 /* Localbus SDRAM */ +#define CFG_LBC_SDRAM_SIZE 64 /* LBC SDRAM is 64MB */
/* * Base Register 2 and Option Register 2 configure SDRAM. diff -Nur --exclude=CVS u-boot/include/configs/MPC8555CDS.h u-boot-pq3/include/configs/MPC8555CDS.h --- u-boot/include/configs/MPC8555CDS.h 2005-02-02 15:58:50.000000000 -0600 +++ u-boot-pq3/include/configs/MPC8555CDS.h 2005-02-01 13:17:15.000000000 -0600 @@ -94,18 +95,50 @@ #error ("CONFIG_SPD_EEPROM is required by MPC85555CDS") #endif
+#undef CONFIG_CLOCKS_IN_MHZ + + /* - * SDRAM on the Local Bus + * Local Bus Definitions */ -#define CFG_LBC_SDRAM_BASE 0xf0000000 /* Localbus SDRAM */ -#define CFG_LBC_SDRAM_SIZE 64 /* LBC SDRAM is 64MB */ + +/* + * FLASH on the Local Bus + * Two banks, 8M each, using the CFI driver. + * Boot from BR0/OR0 bank at 0xff00_0000 + * Alternate BR1/OR1 bank at 0xff80_0000 + * + * BR0, BR1: + * Base address 0 = 0xff00_0000 = BR0[0:16] = 1111 1111 0000 0000 0 + * Base address 1 = 0xff80_0000 = BR1[0:16] = 1111 1111 1000 0000 0 + * Port Size = 16 bits = BRx[19:20] = 10 + * Use GPCM = BRx[24:26] = 000 + * Valid = BRx[31] = 1 + * + * 0 4 8 12 16 20 24 28 + * 1111 1111 1000 0000 0001 0000 0000 0001 = ff801001 BR0 + * 1111 1111 0000 0000 0001 0000 0000 0001 = ff001001 BR1 + * + * OR0, OR1: + * Addr Mask = 8M = ORx[0:16] = 1111 1111 1000 0000 0 + * Reserved ORx[17:18] = 11, confusion here? + * CSNT = ORx[20] = 1 + * ACS = half cycle delay = ORx[21:22] = 11 + * SCY = 6 = ORx[24:27] = 0110 + * TRLX = use relaxed timing = ORx[29] = 1 + * EAD = use external address latch delay = OR[31] = 1 + * + * 0 4 8 12 16 20 24 28 + * 1111 1111 1000 0000 0110 1110 0110 0101 = ff806e65 ORx + */ + #define CFG_FLASH_BASE 0xff000000 /* start of FLASH 8M */
-#define CFG_BR0_PRELIM 0xff801001 /* port size 16bit */ -#define CFG_BR1_PRELIM 0xff001001 /* port size 16bit */ +#define CFG_BR0_PRELIM 0xff801001 +#define CFG_BR1_PRELIM 0xff001001
-#define CFG_OR0_PRELIM 0xff806e61 /* 8MB Flash */ -#define CFG_OR1_PRELIM 0xff806e61 /* 8MB Flash */ +#define CFG_OR0_PRELIM 0xff806e65 +#define CFG_OR1_PRELIM 0xff806e65
#define CFG_FLASH_BANKS_LIST {0xff800000, CFG_FLASH_BASE} #define CFG_MAX_FLASH_BANKS 2 /* number of banks */ @@ -120,11 +153,12 @@ #define CFG_FLASH_CFI #define CFG_FLASH_EMPTY_INFO
-#undef CONFIG_CLOCKS_IN_MHZ
/* - * Local Bus Definitions + * SDRAM on the Local Bus */ +#define CFG_LBC_SDRAM_BASE 0xf0000000 /* Localbus SDRAM */ +#define CFG_LBC_SDRAM_SIZE 64 /* LBC SDRAM is 64MB */
/* * Base Register 2 and Option Register 2 configure SDRAM.