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- /*
- 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
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