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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>
* 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>
#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:
mov.l CCR_A, r1 ! CCR Address
mov.l CCR_D_DISABLE, r0 ! CCR Data
mov.l r0, @r1
init_bsc:
mov.l FRQCR_A,r1 /* FRQCR Address */
mov.l FRQCR_D,r0 /* FRQCR Data */
mov.w r0,@r1
mov.l BCR1_A,r1 /* BCR1 Address */
mov.l BCR1_D,r0 /* BCR1 Data */
mov.l r0,@r1
mov.l BCR2_A,r1 /* BCR2 Address */
mov.l BCR2_D,r0 /* BCR2 Data */
mov.w r0,@r1
mov.l WCR1_A,r1 /* WCR1 Address */
mov.l WCR1_D,r0 /* WCR1 Data */
mov.l r0,@r1
mov.l WCR2_A,r1 /* WCR2 Address */
mov.l WCR2_D,r0 /* WCR2 Data */
mov.l r0,@r1
mov.l WCR3_A,r1 /* WCR3 Address */
mov.l WCR3_D,r0 /* WCR3 Data */
mov.l r0,@r1
mov.l MCR_A,r1 /* MCR Address */
mov.l MCR_D1,r0 /* MCR Data1 */
mov.l r0,@r1
mov.l SDMR3_A,r1 /* Set SDRAM mode */
mov #0,r0
mov.b r0,@r1
! Do you need PCMCIA setting?
! If so, please add the lines here...
mov.l RTCNT_A,r1 /* RTCNT Address */
mov.l RTCNT_D,r0 /* RTCNT Data */
mov.w r0,@r1
mov.l RTCOR_A,r1 /* RTCOR Address */
mov.l RTCOR_D,r0 /* RTCOR Data */
mov.w r0,@r1
mov.l RTCSR_A,r1 /* RTCSR Address */
mov.l RTCSR_D,r0 /* RTCSR Data */
mov.w r0,@r1
mov.l RFCR_A,r1 /* RFCR Address */
mov.l RFCR_D,r0 /* RFCR Data */
mov.w r0,@r1 /* Clear reflesh counter */
/* Wait DRAM refresh 30 times */
mov #30,r3
1:
mov.w @r1,r0
extu.w r0,r2
cmp/hi r3,r2
bf 1b
mov.l MCR_A,r1 /* MCR Address */
mov.l MCR_D2,r0 /* MCR Data2 */
mov.l r0,@r1
mov.l SDMR3_A,r1 /* Set SDRAM mode */
mov #0,r0
mov.b r0,@r1
rts
nop
.align 2
CCR_A: .long CCR
CCR_D_DISABLE: .long 0x0808
FRQCR_A: .long FRQCR
FRQCR_D:
#ifdef CONFIG_CPU_TYPE_R
.long 0x00000e1a /* 12:3:3 */
#else /* CONFIG_CPU_TYPE_R */
#ifdef CONFIG_GOOD_SESH4
.long 0x00000e13 /* 6:2:1 */
#else
.long 0x00000e23 /* 6:1:1 */
#endif
#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: .long 0xA518 /* RTCSR Write Code A5h Data 18h */
RTCNT_A: .long RTCNT
RTCNT_D: .long 0xA500 /* RTCNT Write Code A5h Data 00h */
RTCOR_A: .long RTCOR
RTCOR_D: .long RTCOR_D_VALUE /* Set refresh time (about 15us) */
SDMR3_A: .long SDMR3_ADDRESS
MCR_A: .long MCR
MCR_D1: .long MCR_D1_VALUE
MCR_D2: .long MCR_D2_VALUE
RFCR_A: .long RFCR
RFCR_D: .long 0xA400 /* RFCR Write Code A4h Data 00h */
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