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path: root/board/davedenx/qong/lowlevel_init.S
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Diffstat (limited to 'board/davedenx/qong/lowlevel_init.S')
-rw-r--r--board/davedenx/qong/lowlevel_init.S130
1 files changed, 97 insertions, 33 deletions
diff --git a/board/davedenx/qong/lowlevel_init.S b/board/davedenx/qong/lowlevel_init.S
index 198dd76..80bed92 100644
--- a/board/davedenx/qong/lowlevel_init.S
+++ b/board/davedenx/qong/lowlevel_init.S
@@ -42,6 +42,27 @@
bcs 1b
.endm
+.macro SETUP_RAM cfg, ctl
+ /* B8xxxxxx - NAND, 8xxxxxxx - CSD0 RAM */
+ REG 0xB8001010, 0x00000004
+ ldr r3, =\cfg
+ ldr r2, =WEIM_ESDCFG0
+ str r3, [r2]
+ REG 0xB8001000, 0x92100000
+ REG 0x80000f00, 0x12344321
+ REG 0xB8001000, 0xa2100000
+ REG 0x80000000, 0x12344321
+ REG 0x80000000, 0x12344321
+ REG 0xB8001000, 0xb2100000
+ REG8 0x80000033, 0xda
+ REG8 0x81000000, 0xff
+ ldr r3, =\ctl
+ ldr r2, =WEIM_ESDCTL0
+ str r3, [r2]
+ REG 0x80000000, 0xDEADBEEF
+ REG 0xB8001010, 0x0000000c
+
+.endm
/* RedBoot: To support 133MHz DDR */
.macro init_drive_strength
/*
@@ -130,43 +151,86 @@ lowlevel_init:
/* Default: 1, 4, 12, 1 */
REG CCM_SPCTL, PLL_PD(1) | PLL_MFD(4) | PLL_MFI(12) | PLL_MFN(1)
- /* B8xxxxxx - NAND, 8xxxxxxx - CSD0 RAM */
- REG 0xB8001010, 0x00000004
- REG 0xB8001004, ((3 << 21) | /* tXP */ \
- (0 << 20) | /* tWTR */ \
- (2 << 18) | /* tRP */ \
- (1 << 16) | /* tMRD */ \
- (0 << 15) | /* tWR */ \
- (5 << 12) | /* tRAS */ \
- (1 << 10) | /* tRRD */ \
- (3 << 8) | /* tCAS */ \
- (2 << 4) | /* tRCD */ \
- (7 << 0) /* tRC */ )
- REG 0xB8001000, 0x92100000
- REG 0x80000f00, 0x12344321
- REG 0xB8001000, 0xa2100000
- REG 0x80000000, 0x12344321
- REG 0x80000000, 0x12344321
- REG 0xB8001000, 0xb2100000
- REG8 0x80000033, 0xda
- REG8 0x81000000, 0xff
- REG 0xB8001000, ((1 << 31) | \
- (0 << 28) | \
- (0 << 27) | \
- (3 << 24) | /* 14 rows */ \
- (2 << 20) | /* 10 cols */ \
- (2 << 16) | \
- (4 << 13) | /* 3.91us (64ms/16384) */ \
- (0 << 10) | \
- (0 << 8) | \
- (1 << 7) | \
- (0 << 0))
- REG 0x80000000, 0xDEADBEEF
- REG 0xB8001010, 0x0000000c
+check_ddr_module:
+/* Set stackpointer in internal RAM to call get_ram_size */
+ ldr sp, =(IRAM_BASE_ADDR + IRAM_SIZE - 16)
+ stmfd sp!, {r0-r11, ip, lr}
+ mov ip, lr /* save link reg across call */
+
+ ldr r0,=0x08000000
+ SETUP_RAM ESDCFG0_256MB, ESDCTL0_256MB
+ ldr r0,=0x80000000
+ ldr r1,=0x10000000
+ bl get_ram_size
+ ldr r1,=0x10000000
+ cmp r0,r1
+ beq restore_regs
+ SETUP_RAM ESDCFG0_128MB, ESDCTL0_128MB
+ ldr r0,=0x80000000
+ ldr r1,=0x08000000
+ bl get_ram_size
+ ldr r1,=0x08000000
+ cmp r0,r1
+ beq restore_regs
+
+restore_regs:
+ ldmfd sp!, {r0-r11, ip, lr}
+ mov lr, ip /* restore link reg */
mov pc, lr
+
MPCTL_PARAM_399:
.word (((1 - 1) << 26) + ((52 - 1) << 16) + (7 << 10) + (35 << 0))
UPCTL_PARAM_240:
.word (((2 - 1) << 26) + ((13 - 1) << 16) + (9 << 10) + (3 << 0))
+
+ .equ ESDCFG0_128MB, \
+ (0 << 21) + /* tXP */ \
+ (1 << 20) + /* tWTR */ \
+ (2 << 18) + /* tRP */ \
+ (1 << 16) + /* tMRD */ \
+ (0 << 15) + /* tWR */ \
+ (5 << 12) + /* tRAS */ \
+ (1 << 10) + /* tRRD */ \
+ (3 << 8) + /* tCAS */ \
+ (2 << 4) + /* tRCD */ \
+ (0x0F << 0) /* tRC */
+
+ .equ ESDCTL0_128MB, \
+ (1 << 31) + /* enable */ \
+ (0 << 28) + /* mode */ \
+ (0 << 27) + /* supervisor protect */ \
+ (2 << 24) + /* 13 rows */ \
+ (2 << 20) + /* 10 cols */ \
+ (2 << 16) + /* 32 bit */ \
+ (3 << 13) + /* 7.81us (64ms/8192) */ \
+ (0 << 10) + /* power down timer */ \
+ (0 << 8) + /* full page */ \
+ (1 << 7) + /* burst length */ \
+ (0 << 0) /* precharge timer */
+
+ .equ ESDCFG0_256MB, \
+ (3 << 21) + /* tXP */ \
+ (0 << 20) + /* tWTR */ \
+ (2 << 18) + /* tRP */ \
+ (1 << 16) + /* tMRD */ \
+ (0 << 15) + /* tWR */ \
+ (5 << 12) + /* tRAS */ \
+ (1 << 10) + /* tRRD */ \
+ (3 << 8) + /* tCAS */ \
+ (2 << 4) + /* tRCD */ \
+ (7 << 0) /* tRC */
+
+ .equ ESDCTL0_256MB, \
+ (1 << 31) + \
+ (0 << 28) + \
+ (0 << 27) + \
+ (3 << 24) + /* 14 rows */ \
+ (2 << 20) + /* 10 cols */ \
+ (2 << 16) + \
+ (4 << 13) + /* 3.91us (64ms/16384) */ \
+ (0 << 10) + \
+ (0 << 8) + \
+ (1 << 7) + \
+ (0 << 0)