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-rw-r--r--board/zylonite/lowlevel_init.S373
1 files changed, 0 insertions, 373 deletions
diff --git a/board/zylonite/lowlevel_init.S b/board/zylonite/lowlevel_init.S
deleted file mode 100644
index 6f2ad23..0000000
--- a/board/zylonite/lowlevel_init.S
+++ /dev/null
@@ -1,373 +0,0 @@
-/*
- * 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.
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * 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
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <config.h>
-#include <version.h>
-#include <asm/arch/pxa-regs.h>
-
-DRAM_SIZE: .long CONFIG_SYS_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
- str r3, [r2]
-0:
- 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 41 - 48 as UART1 / altern. Fkt. 2 */
- ldr r0, =0x40E10438 @ GPIO41 FFRXD
- ldr r1, =0x802
- str r1, [r0]
-
- ldr r0, =0x40E1043C @ GPIO42 FFTXD
- ldr r1, =0x802
- str r1, [r0]
-
- ldr r0, =0x40E10440 @ GPIO43 FFCTS
- ldr r1, =0x802
- str r1, [r0]
-
- ldr r0, =0x40E10444 @ GPIO 44 FFDCD
- ldr r1, =0x802
- str r1, [r0]
-
- ldr r0, =0x40E10448 @ GPIO 45 FFDSR
- ldr r1, =0x802
- str r1, [r0]
-
- ldr r0, =0x40E1044C @ GPIO 46 FFRI
- ldr r1, =0x802
- str r1, [r0]
-
- ldr r0, =0x40E10450 @ GPIO 47 FFDTR
- ldr r1, =0x802
- str r1, [r0]
-
- ldr r0, =0x40E10454 @ GPIO 48
- ldr r1, =0x802
- 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 */
- /* */
- /* The sequence below is based on the recommended init steps */
- /* detailed in the Intel PXA250 Operating Systems Developers Guide, */
- /* Chapter 10. */
- /* ---------------------------------------------------------------- */
-
- /* ---------------------------------------------------------------- */
- /* Step 1: Wait for at least 200 microsedonds to allow internal */
- /* clocks to settle. Only necessary after hard reset... */
- /* FIXME: can be optimized later */
- /* ---------------------------------------------------------------- */
-
- /* mk: replaced with wait macro */
-/* ldr r3, =OSCR /\* reset the OS Timer Count to zero *\/ */
-/* mov r2, #0 */
-/* str r2, [r3] */
-/* ldr r4, =0x300 /\* really 0x2E1 is about 200usec, *\/ */
-/* /\* so 0x300 should be plenty *\/ */
-/* 1: */
-/* ldr r2, [r3] */
-/* cmp r4, r2 */
-/* bgt 1b */
- wait #0x300
-
-mem_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]
-
-#ifndef CONFIG_SYS_SKIP_DRAM_SCRUB
- /* scrub/init SDRAM if enabled/present */
-/* ldr r11, =0xa0000000 /\* base address of SDRAM (CONFIG_SYS_DRAM_BASE) *\/ */
-/* ldr r12, =0x04000000 /\* size of memory to scrub (CONFIG_SYS_DRAM_SIZE) *\/ */
-/* mov r8,r12 /\* save DRAM size (mk: why???) *\/ */
- ldr r8, =0xa0000000 /* base address of SDRAM (CONFIG_SYS_DRAM_BASE) */
- ldr r9, =0x04000000 /* size of memory to scrub (CONFIG_SYS_DRAM_SIZE) */
- mov r0, #0 /* scrub with 0x0000:0000 */
- mov r1, #0
- mov r2, #0
- mov r3, #0
- mov r4, #0
- mov r5, #0
- mov r6, #0
- mov r7, #0
-10: /* fastScrubLoop */
- subs r9, r9, #32 /* 32 bytes/line */
- stmia r8!, {r0-r7}
- beq 15f
- b 10b
-#endif /* CONFIG_SYS_SKIP_DRAM_SCRUB */
-
-15:
- /* Mask all interrupts */
- mov r1, #0
- mcr p6, 0, r1, c1, c0, 0 @ ICMR
-
- /* 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 */
-
- /* Enable all debug functionality */
- mov r0,#0x80000000
- mcr p14,0,r0,c10,c0,0 /* dcsr */
-
- /* We are finished with Intel's memory controller initialisation */
-
- /* ---------------------------------------------------------------- */
- /* End lowlevel_init */
- /* ---------------------------------------------------------------- */
-
-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
-*/
generated by cgit v1.1 at 2024-12-03 03:20:39 +0000