| /* |
| * (C) Copyright 2008 |
| * Mark Jonas <mark.jonas@de.bosch.com> |
| * |
| * (C) Copyright 2007 |
| * Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> |
| * |
| * board/mpr2/lowlevel_init.S |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| #include <asm/macro.h> |
| |
| .global lowlevel_init |
| |
| .text |
| .align 2 |
| |
| lowlevel_init: |
| |
| /* |
| * Set frequency multipliers and dividers in FRQCR. |
| */ |
| write16 WTCSR_A, WTCSR_D |
| |
| write16 WTCNT_A, WTCNT_D |
| |
| write16 FRQCR_A, FRQCR_D |
| |
| /* |
| * Setup CS0 (Flash). |
| */ |
| write32 CS0BCR_A, CS0BCR_D |
| |
| write32 CS0WCR_A, CS0WCR_D |
| |
| /* |
| * Setup CS3 (SDRAM). |
| */ |
| write32 CS3BCR_A, CS3BCR_D |
| |
| write32 CS3WCR_A, CS3WCR_D |
| |
| write32 SDCR_A, SDCR_D1 |
| |
| write32 RTCSR_A, RTCSR_D |
| |
| write32 RTCNT_A, RTCNT_D |
| |
| write32 RTCOR_A, RTCOR_D |
| |
| write32 SDCR_A, SDCR_D2 |
| |
| mov.l SDMR3_A, r1 |
| mov.l SDMR3_D, r0 |
| add r0, r1 |
| mov #0, r0 |
| mov.w r0, @r1 |
| |
| rts |
| nop |
| |
| .align 4 |
| |
| /* |
| * Configuration for MPR2 A.3 through A.7 |
| */ |
| |
| /* |
| * PLL Settings |
| */ |
| FRQCR_D: .word 0x1103 /* I:B:P=8:4:2 */ |
| WTCNT_D: .word 0x5A00 /* start counting at zero */ |
| WTCSR_D: .word 0xA507 /* divide by 4096 */ |
| .align 2 |
| /* |
| * Spansion S29GL256N11 @ 48 MHz |
| */ |
| /* 1 idle cycle inserted, normal space, 16 bit */ |
| CS0BCR_D: .long 0x12490400 |
| /* tSW=0.5ck, 6 wait cycles, NO external wait, tHW=0.5ck */ |
| CS0WCR_D: .long 0x00000340 |
| |
| /* |
| * Samsung K4S511632B-UL75 @ 48 MHz |
| * Micron MT48LC32M16A2-75 @ 48 MHz |
| */ |
| /* CS3BCR = 0x10004400, minimum idle cycles, SDRAM, 16 bit */ |
| CS3BCR_D: .long 0x10004400 |
| /* tRP=1ck, tRCD=1ck, CL=2, tRWL=2ck, tRC=4ck */ |
| CS3WCR_D: .long 0x00000091 |
| /* no refresh, 13 rows, 10 cols, NO bank active mode */ |
| SDCR_D1: .long 0x00000012 |
| SDCR_D2: .long 0x00000812 /* refresh */ |
| RTCSR_D: .long 0xA55A0008 /* 1/4, once */ |
| RTCNT_D: .long 0xA55A005D /* count 93 */ |
| RTCOR_D: .long 0xa55a005d /* count 93 */ |
| /* mode register CL2, burst read and SINGLE WRITE */ |
| SDMR3_D: .long 0x440 |
| |
| /* |
| * Registers |
| */ |
| |
| FRQCR_A: .long 0xA415FF80 |
| WTCNT_A: .long 0xA415FF84 |
| WTCSR_A: .long 0xA415FF86 |
| |
| #define BSC_BASE 0xA4FD0000 |
| CS0BCR_A: .long BSC_BASE + 0x04 |
| CS3BCR_A: .long BSC_BASE + 0x0C |
| CS0WCR_A: .long BSC_BASE + 0x24 |
| CS3WCR_A: .long BSC_BASE + 0x2C |
| SDCR_A: .long BSC_BASE + 0x44 |
| RTCSR_A: .long BSC_BASE + 0x48 |
| RTCNT_A: .long BSC_BASE + 0x4C |
| RTCOR_A: .long BSC_BASE + 0x50 |
| SDMR3_A: .long BSC_BASE + 0x5000 |