From 552fc624f28d5db7b25f38c4e104fb7255d7df6b Mon Sep 17 00:00:00 2001 From: Markus Klotzbuecher Date: Mon, 20 Mar 2006 20:19:37 +0100 Subject: Cleanup of the monahans cpu and delta board port. --- board/delta/lowlevel_init.S | 245 +------------------------------------------- board/delta/nand.c | 10 +- 2 files changed, 5 insertions(+), 250 deletions(-) (limited to 'board/delta') diff --git a/board/delta/lowlevel_init.S b/board/delta/lowlevel_init.S index 498cf7f60..f059db505 100644 --- a/board/delta/lowlevel_init.S +++ b/board/delta/lowlevel_init.S @@ -1,10 +1,5 @@ /* - * Most of this taken from Redboot hal_platform_setup.h with cleanup - * - * NOTE: I haven't clean this up considerably, just enough to get it - * running. See hal_platform_setup.h for the source. See - * board/cradle/lowlevel_init.S for another PXA250 setup that is - * much cleaner. + * (C) Copyright 2006 DENX Software Engineering * * See file CREDITS for list of people who contributed to this * project. @@ -31,14 +26,6 @@ DRAM_SIZE: .long CFG_DRAM_SIZE -/* wait for coprocessor write complete */ -.macro CPWAIT reg - mrc p15,0,\reg,c2,c0,0 - mov \reg,\reg - sub pc,pc,#4 -.endm - - .macro wait time ldr r2, =OSCR mov r3, #0 @@ -49,13 +36,9 @@ DRAM_SIZE: .long CFG_DRAM_SIZE bls 0b .endm -/* - * Memory setup - */ - .globl lowlevel_init lowlevel_init: - /* Set up GPIO pins first ----------------------------------------- */ + /* Set up GPIO pins first */ mov r10, lr /* Configure GPIO Pins 97, 98 UART1 / altern. Fkt. 1 */ @@ -73,22 +56,7 @@ lowlevel_init: bic r1, r1, #0x80000000 str r1, [r0] - /* ---------------------------------------------------------------- */ - /* Enable memory interface */ - /* ---------------------------------------------------------------- */ - - /* ---------------------------------------------------------------- */ - /* Step 1: Wait for at least 200 microsedonds to allow internal */ - /* clocks to settle. Only necessary after hard reset... */ - /* FIXME: can be optimized later */ - /* ---------------------------------------------------------------- */ -; wait #300 - mem_init: - -#define NEW_SDRAM_INIT 1 -#ifdef NEW_SDRAM_INIT - /* Configure ACCR Register - enable DMEMC Clock at 260 / 2 MHz */ ldr r0, =ACCR ldr r1, [r0] @@ -99,7 +67,7 @@ mem_init: /* 2. Programm MDCNFG, leaving DMCEN de-asserted */ ldr r0, =MDCNFG ldr r1, =(MDCNFG_DMAP | MDCNFG_DTYPE | MDCNFG_DTC_2 | MDCNFG_DCSE0 | MDCNFG_DRAC_13) - /* ldr r1, =0x80000403 */ + /* ldr r1, =0x80000403 */ str r1, [r0] ldr r1, [r0] /* delay until written */ @@ -140,121 +108,6 @@ mem_init: orr r1, r1, #MDCNFG_DMCEN str r1, [r0] - -#else /* NEW_SDRAM_INIT */ - - /* configure the MEMCLKCFG register */ - ldr r1, =MEMCLKCFG - ldr r2, =0x00010001 - str r2, [r1] @ WRITE - ldr r2, [r1] @ DELAY UNTIL WRITTEN - - /* set CSADRCFG[0] to data flash SRAM mode */ - ldr r1, =CSADRCFG0 - ldr r2, =0x00320809 - str r2, [r1] @ WRITE - ldr r2, [r1] @ DELAY UNTIL WRITTEN - - /* set CSADRCFG[1] to data flash SRAM mode */ - ldr r1, =CSADRCFG1 - ldr r2, =0x00320809 - str r2, [r1] @ WRITE - ldr r2, [r1] @ DELAY UNTIL WRITTEN - - /* set MSC 0 register for SRAM memory */ - ldr r1, =MSC0 - ldr r2, =0x11191119 - str r2, [r1] @ WRITE - ldr r2, [r1] @ DELAY UNTIL WRITTEN - - /* set CSADRCFG[2] to data flash SRAM mode */ - ldr r1, =CSADRCFG2 - ldr r2, =0x00320809 - str r2, [r1] @ WRITE - ldr r2, [r1] @ DELAY UNTIL WRITTEN - - /* set CSADRCFG[3] to VLIO mode */ - ldr r1, =CSADRCFG3 - ldr r2, =0x0032080B - str r2, [r1] @ WRITE - ldr r2, [r1] @ DELAY UNTIL WRITTEN - - /* set MSC 1 register for VLIO memory */ - ldr r1, =MSC1 - ldr r2, =0x123C1119 - str r2, [r1] @ WRITE - ldr r2, [r1] @ DELAY UNTIL WRITTEN - -#if 0 - /* This does not work in Zylonite. -SC */ - ldr r0, =0x15fffff0 - ldr r1, =0xb10b - str r1, [r0] - str r1, [r0, #4] -#endif - - /* Configure ACCR Register */ - ldr r0, =ACCR @ ACCR - ldr r1, =0x0180b108 - str r1, [r0] - ldr r1, [r0] - - /* Configure MDCNFG Register */ - ldr r0, =MDCNFG @ MDCNFG - ldr r1, =0x403 - str r1, [r0] - ldr r1, [r0] - - /* Perform Resistive Compensation by configuring RCOMP register */ - ldr r1, =RCOMP @ RCOMP - ldr r2, =0x000000ff - str r2, [r1] - ldr r2, [r1] - - /* Configure MDMRS Register for SDCS0 */ - ldr r1, =MDMRS @ MDMRS - ldr r2, =0x60000023 - ldr r3, [r1] - orr r2, r2, r3 - str r2, [r1] - ldr r2, [r1] - - /* Configure MDMRS Register for SDCS1 */ - ldr r1, =MDMRS @ MDMRS - ldr r2, =0xa0000023 - ldr r3, [r1] - orr r2, r2, r3 - str r2, [r1] - ldr r2, [r1] - - /* Configure MDREFR */ - ldr r1, =MDREFR @ MDREFR - ldr r2, =0x00000006 - str r2, [r1] - ldr r2, [r1] - - /* Configure EMPI */ - ldr r1, =EMPI @ EMPI - ldr r2, =0x80000000 - str r2, [r1] - ldr r2, [r1] - - /* Hardware DDR Read-Strobe Delay Calibration */ - ldr r0, =DDR_HCAL @ DDR_HCAL - ldr r1, =0x803ffc07 @ the offset is correct? -SC - str r1, [r0] - wait #5 - ldr r1, [r0] - - /* Here we assume the hardware calibration alwasy be successful. -SC */ - /* Set DMCEN bit in MDCNFG Register */ - ldr r0, =MDCNFG @ MDCNFG - ldr r1, [r0] - orr r1, r1, #0x40000000 @ enable SDRAM for Normal Access - str r1, [r0] - -#endif /* NEW_SDRAM_INIT */ - #ifndef CFG_SKIP_DRAM_SCRUB /* scrub/init SDRAM if enabled/present */ ldr r8, =CFG_DRAM_BASE /* base address of SDRAM (CFG_DRAM_BASE) */ @@ -290,96 +143,4 @@ mem_init: mcr p14,0,r0,c10,c0,0 /* dcsr */ endlowlevel_init: - mov pc, lr - - -/* -@******************************************************************************** -@ DDR calibration -@ -@ This function is used to calibrate DQS delay lines. -@ Monahans supports three ways to do it. One is software -@ calibration. Two is hardware calibration. Three is hybrid -@ calibration. -@ -@ TBD -@ -SC -ddr_calibration: - - @ Case 1: Write the correct delay value once - @ Configure DDR_SCAL Register - ldr r0, =DDR_SCAL @ DDR_SCAL -q ldr r1, =0xaf2f2f2f - str r1, [r0] - ldr r1, [r0] -*/ -/* @ Case 2: Software Calibration - @ Write test pattern to memory - ldr r5, =0x0faf0faf @ Data Pattern - ldr r4, =0xa0000000 @ DDR ram - str r5, [r4] - - mov r1, =0x0 @ delay count - mov r6, =0x0 - mov r7, =0x0 -ddr_loop1: - add r1, r1, =0x1 - cmp r1, =0xf - ble end_loop - mov r3, r1 - mov r0, r1, lsl #30 - orr r3, r3, r0 - mov r0, r1, lsl #22 - orr r3, r3, r0 - mov r0, r1, lsl #14 - orr r3, r3, r0 - orr r3, r3, =0x80000000 - ldr r2, =DDR_SCAL - str r3, [r2] - - ldr r2, [r4] - cmp r2, r5 - bne ddr_loop1 - mov r6, r1 -ddr_loop2: - add r1, r1, =0x1 - cmp r1, =0xf - ble end_loop - mov r3, r1 - mov r0, r1, lsl #30 - orr r3, r3, r0 - mov r0, r1, lsl #22 - orr r3, r3, r0 - mov r0, r1, lsl #14 - orr r3, r3, r0 - orr r3, r3, =0x80000000 - ldr r2, =DDR_SCAL - str r3, [r2] - - ldr r2, [r4] - cmp r2, r5 - be ddr_loop2 - mov r7, r2 - - add r3, r6, r7 - lsr r3, r3, =0x1 - mov r0, r1, lsl #30 - orr r3, r3, r0 - mov r0, r1, lsl #22 - orr r3, r3, r0 - mov r0, r1, lsl #14 - orr r3, r3, r0 - orr r3, r3, =0x80000000 - ldr r2, =DDR_SCAL - -end_loop: - - @ Case 3: Hardware Calibratoin - ldr r0, =DDR_HCAL @ DDR_HCAL - ldr r1, =0x803ffc07 @ the offset is correct? -SC - str r1, [r0] - wait #5 - ldr r1, [r0] - mov pc, lr -*/ diff --git a/board/delta/nand.c b/board/delta/nand.c index 50def5909..c332f710d 100644 --- a/board/delta/nand.c +++ b/board/delta/nand.c @@ -293,11 +293,6 @@ static int dfc_wait(struct mtd_info *mtd, struct nand_chip *this, int state) { unsigned long ndsr=0, event=0; - /* mk@tbd set appropriate timeouts */ - /* if (state == FL_ERASING) */ - /* timeo = CFG_HZ * 400; */ - /* else */ - /* timeo = CFG_HZ * 20; */ if(state == FL_WRITING) { event = NDSR_CS0_CMDD | NDSR_CS0_BBD; } else if(state == FL_ERASING) { @@ -563,13 +558,12 @@ void board_nand_init(struct nand_chip *nand) /* wait 10 us due to cmd buffer clear reset */ - /* wait(10); */ + /* wait(10); */ nand->hwcontrol = dfc_hwcontrol; -/* nand->dev_ready = dfc_device_ready; */ +/* nand->dev_ready = dfc_device_ready; */ nand->eccmode = NAND_ECC_SOFT; - nand->chip_delay = NAND_DELAY_US; nand->options = NAND_BUSWIDTH_16; nand->waitfunc = dfc_wait; nand->read_byte = dfc_read_byte; -- cgit v1.2.3