diff options
Diffstat (limited to 'u-boot/board/ms7750se/lowlevel_init.S')
| -rw-r--r-- | u-boot/board/ms7750se/lowlevel_init.S | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/u-boot/board/ms7750se/lowlevel_init.S b/u-boot/board/ms7750se/lowlevel_init.S new file mode 100644 index 0000000..3041e64 --- /dev/null +++ b/u-boot/board/ms7750se/lowlevel_init.S @@ -0,0 +1,159 @@ +/* + 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> + + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA +*/ + +#include <config.h> +#include <version.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 |