/*
- * 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
#include <version.h>
#include <asm/arch/pxa-regs.h>
-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
-
+DRAM_SIZE: .long CONFIG_SYS_DRAM_SIZE
.macro wait time
- ldr r2, =OSCR
- mov r3, #0
- str r3, [r2]
+ ldr r2, =OSCR
+ mov r3, #0
+ str r3, [r2]
0:
- ldr r3, [r2]
- cmp r3, \time
- bls 0b
+ ldr r3, [r2]
+ cmp r3, \time
+ bls 0b
.endm
-/*
- * Memory setup
- */
-
.globl lowlevel_init
lowlevel_init:
- /* Set up GPIO pins first ----------------------------------------- */
- mov r10, lr
-
- /* Configure GPIO Pins 97, 98 UART1 / altern. Fkt. 1 */
+ /* Set up GPIO pins first */
+ mov r10, lr
+
+ /* Configure GPIO Pins 97, 98 UART1 / altern. Fkt. 1 */
ldr r0, =GPIO97
ldr r1, =0x801
str r1, [r0]
ldr r0, =GPIO98
ldr r1, =0x801
str r1, [r0]
-
- /* tebrandt - ASCR, clear the RDH bit */
- ldr r0, =ASCR
- ldr r1, [r0]
- 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
+ /* tebrandt - ASCR, clear the RDH bit */
+ ldr r0, =ASCR
+ ldr r1, [r0]
+ bic r1, r1, #0x80000000
+ str r1, [r0]
+mem_init:
/* Configure ACCR Register - enable DMEMC Clock at 260 / 2 MHz */
ldr r0, =ACCR
ldr r1, [r0]
/* 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 */
- /* 3. wait nop power up waiting period (200ms)
+ /* 3. wait nop power up waiting period (200ms)
* optimization: Steps 4+6 can be done during this
*/
wait #300
ldr r1, =0x60000033
str r1, [r0]
wait #300
-
+
/* Configure MDREFR */
ldr r0, =MDREFR
ldr r1, =0x00000006
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
+#ifndef CONFIG_SYS_SKIP_DRAM_SCRUB
/* scrub/init SDRAM if enabled/present */
- ldr r8, =CFG_DRAM_BASE /* base address of SDRAM (CFG_DRAM_BASE) */
- ldr r9, =CFG_DRAM_SIZE /* size of memory to scrub (CFG_DRAM_SIZE) */
+ ldr r8, =CONFIG_SYS_DRAM_BASE /* base address of SDRAM (CONFIG_SYS_DRAM_BASE) */
+ ldr r9, =CONFIG_SYS_DRAM_SIZE /* size of memory to scrub (CONFIG_SYS_DRAM_SIZE) */
mov r0, #0 /* scrub with 0x0000:0000 */
mov r1, #0
- mov r2, #0
+ mov r2, #0
mov r3, #0
- mov r4, #0
+ mov r4, #0
mov r5, #0
- mov r6, #0
+ mov r6, #0
mov r7, #0
-10: /* fastScrubLoop */
+10: /* fastScrubLoop */
subs r9, r9, #32 /* 8 words/line */
stmia r8!, {r0-r7}
beq 15f
b 10b
-#endif /* CFG_SKIP_DRAM_SCRUB */
+#endif /* CONFIG_SYS_SKIP_DRAM_SCRUB */
15:
/* Mask all interrupts */
/* Disable software and data breakpoints */
mov r0, #0
- mcr p15,0,r0,c14,c8,0 // ibcr0
- mcr p15,0,r0,c14,c9,0 // ibcr1
- mcr p15,0,r0,c14,c4,0 // dbcon
+ mcr p15,0,r0,c14,c8,0 /* ibcr0 */
+ mcr p15,0,r0,c14,c9,0 /* ibcr1 */
+ mcr p15,0,r0,c14,c4,0 /* dbcon */
/* Enable all debug functionality */
mov r0,#0x80000000
- mcr p14,0,r0,c10,c0,0 // dcsr
+ 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
-*/
+ mov pc, lr
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