| /* |
| modified from SH-IPL+g |
| Renesaso SuperH / Solution Enginge MS775xSE01 BSC setting. |
| |
| Support CPU : SH7750/SH7750S/SH7750R/SH7751/SH7751R |
| |
| Coyright (c) 2007 Nobuhiro Iwamatsu <iwmatsu@nigauri.org> |
| |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <config.h> |
| |
| #include <asm/processor.h> |
| #include <asm/macro.h> |
| |
| #ifdef CONFIG_CPU_SH7751 |
| #define BCR2_D_VALUE 0x2FFC /* Area 1-6 width: 32/32/32/32/32/16 */ |
| #define WCR1_D_VALUE 0x02770771 /* DMA:0 A6:2 A3:0 A0:1 Others:15 */ |
| #ifdef CONFIG_MARUBUN_PCCARD |
| #define WCR2_D_VALUE 0xFFFE4FE7 /* A6:15 A6B:7 A5:15 A5B:7 A4:15 |
| A3:2 A2:15 A1:15 A0:6 A0B:7 */ |
| #else /* CONFIG_MARUBUN_PCCARD */ |
| #define WCR2_D_VALUE 0x7FFE4FE7 /* A6:3 A6B:7 A5:15 A5B:7 A4:15 |
| A3:2 A2:15 A1:15 A0:6 A0B:7 */ |
| #endif /* CONFIG_MARUBUN_PCCARD */ |
| #define WCR3_D_VALUE 0x01777771 /* A6: 0-1 A5: 1-3 A4: 1-3 A3: 1-3 |
| A2: 1-3 A1: 1-3 A0: 0-1 */ |
| #define RTCOR_D_VALUE 0xA50D /* Write code A5, data 0D (~15us?) */ |
| #define SDMR3_ADDRESS 0xFF940088 /* SDMR3 address on 32-bit bus */ |
| #define MCR_D1_VALUE 0x100901B4 /* SDRAM 32-bit, CAS/RAS Refresh, .. */ |
| #define MCR_D2_VALUE 0x500901B4 /* Same w/MRSET now 1 (mode reg cmd) */ |
| #else /* CONFIG_CPU_SH7751 */ |
| #define BCR2_D_VALUE 0x2E3C /* Area 1-6 width: 32/32/64/16/32/16 */ |
| #define WCR1_D_VALUE 0x02720777 /* DMA:0 A6:2 A4:2 A3:0 Others:15 */ |
| #define WCR2_D_VALUE 0xFFFE4FFF /* A6:15 A6B:7 A5:15 A5B:7 A4:15 |
| A3:2 A2:15 A1:15 A0:15 A0B:7 */ |
| #define WCR3_D_VALUE 0x01717771 /* A6: 0-1 A5: 1-3 A4: 0-1 A3: 1-3 |
| A2: 1-3 A1: 1-3 A0: 0-1 */ |
| #define RTCOR_D_VALUE 0xA510 /* Write code A5, data 10 (~15us?) */ |
| #define SDMR3_ADDRESS 0xFF940110 /* SDMR3 address on 64-bit bus */ |
| #define MCR_D1_VALUE 0x8801001C /* SDRAM 64-bit, CAS/RAS Refresh, .. */ |
| #define MCR_D2_VALUE 0xC801001C /* Same w/MRSET now 1 (mode reg cmd) */ |
| #endif /* CONFIG_CPU_SH7751 */ |
| |
| .global lowlevel_init |
| .text |
| .align 2 |
| |
| lowlevel_init: |
| |
| write32 CCR_A, CCR_D_DISABLE |
| |
| init_bsc: |
| write16 FRQCR_A, FRQCR_D |
| |
| write32 BCR1_A, BCR1_D |
| |
| write16 BCR2_A, BCR2_D |
| |
| write32 WCR1_A, WCR1_D |
| |
| write32 WCR2_A, WCR2_D |
| |
| write32 WCR3_A, WCR3_D |
| |
| write32 MCR_A, MCR_D1 |
| |
| /* Set SDRAM mode */ |
| write8 SDMR3_A, SDMR3_D |
| |
| ! Do you need PCMCIA setting? |
| ! If so, please add the lines here... |
| |
| write16 RTCNT_A, RTCNT_D |
| |
| write16 RTCOR_A, RTCOR_D |
| |
| write16 RTCSR_A, RTCSR_D |
| |
| write16 RFCR_A, RFCR_D |
| |
| /* Wait DRAM refresh 30 times */ |
| mov #30, r3 |
| 1: |
| mov.w @r1, r0 |
| extu.w r0, r2 |
| cmp/hi r3, r2 |
| bf 1b |
| |
| write32 MCR_A, MCR_D2 |
| |
| /* Set SDRAM mode */ |
| write8 SDMR3_A, SDMR3_D |
| |
| rts |
| nop |
| |
| .align 2 |
| |
| CCR_A: .long CCR |
| CCR_D_DISABLE: .long 0x0808 |
| FRQCR_A: .long FRQCR |
| FRQCR_D: |
| #ifdef CONFIG_CPU_TYPE_R |
| .word 0x0e1a /* 12:3:3 */ |
| #else /* CONFIG_CPU_TYPE_R */ |
| #ifdef CONFIG_GOOD_SESH4 |
| .word 0x00e13 /* 6:2:1 */ |
| #else |
| .word 0x00e23 /* 6:1:1 */ |
| #endif |
| .align 2 |
| #endif /* CONFIG_CPU_TYPE_R */ |
| |
| BCR1_A: .long BCR1 |
| BCR1_D: .long 0x00000008 /* Area 3 SDRAM */ |
| BCR2_A: .long BCR2 |
| BCR2_D: .long BCR2_D_VALUE /* Bus width settings */ |
| WCR1_A: .long WCR1 |
| WCR1_D: .long WCR1_D_VALUE /* Inter-area or turnaround wait states */ |
| WCR2_A: .long WCR2 |
| WCR2_D: .long WCR2_D_VALUE /* Per-area access and burst wait states */ |
| WCR3_A: .long WCR3 |
| WCR3_D: .long WCR3_D_VALUE /* Address setup and data hold cycles */ |
| RTCSR_A: .long RTCSR |
| RTCSR_D: .word 0xA518 /* RTCSR Write Code A5h Data 18h */ |
| .align 2 |
| RTCNT_A: .long RTCNT |
| RTCNT_D: .word 0xA500 /* RTCNT Write Code A5h Data 00h */ |
| .align 2 |
| RTCOR_A: .long RTCOR |
| RTCOR_D: .word RTCOR_D_VALUE /* Set refresh time (about 15us) */ |
| .align 2 |
| SDMR3_A: .long SDMR3_ADDRESS |
| SDMR3_D: .long 0x00 |
| MCR_A: .long MCR |
| MCR_D1: .long MCR_D1_VALUE |
| MCR_D2: .long MCR_D2_VALUE |
| RFCR_A: .long RFCR |
| RFCR_D: .word 0xA400 /* RFCR Write Code A4h Data 00h */ |
| .align 2 |
