diff options
Diffstat (limited to 'board/davedenx/qong/lowlevel_init.S')
| -rw-r--r-- | board/davedenx/qong/lowlevel_init.S | 130 |
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) |