diff options
Diffstat (limited to 'board/mpr2/lowlevel_init.S')
| -rw-r--r-- | board/mpr2/lowlevel_init.S | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/board/mpr2/lowlevel_init.S b/board/mpr2/lowlevel_init.S new file mode 100644 index 0000000..060957a --- /dev/null +++ b/board/mpr2/lowlevel_init.S @@ -0,0 +1,148 @@ +/* + * (C) Copyright 2008 + * Mark Jonas <mark.jonas@de.bosch.com> + * + * (C) Copyright 2007 + * Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com> + * + * board/mpr2/lowlevel_init.S + * + * 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 + */ + + .global lowlevel_init + + .text + .align 2 + +lowlevel_init: + +/* + * Set frequency multipliers and dividers in FRQCR. + */ + mov.l WTCSR_A,r1 + mov.l WTCSR_D,r0 + mov.w r0,@r1 + + mov.l WTCNT_A,r1 + mov.l WTCNT_D,r0 + mov.w r0,@r1 + + mov.l FRQCR_A,r1 + mov.l FRQCR_D,r0 + mov.w r0,@r1 + +/* + * Setup CS0 (Flash). + */ + mov.l CS0BCR_A, r1 + mov.l CS0BCR_D, r0 + mov.l r0, @r1 + + mov.l CS0WCR_A, r1 + mov.l CS0WCR_D, r0 + mov.l r0, @r1 + +/* + * Setup CS3 (SDRAM). + */ + mov.l CS3BCR_A, r1 + mov.l CS3BCR_D, r0 + mov.l r0, @r1 + + mov.l CS3WCR_A, r1 + mov.l CS3WCR_D, r0 + mov.l r0, @r1 + + mov.l SDCR_A, r1 + mov.l SDCR_D1, r0 + mov.l r0, @r1 + + mov.l RTCSR_A, r1 + mov.l RTCSR_D, r0 + mov.l r0, @r1 + + mov.l RTCNT_A, r1 + mov.l RTCNT_D, r0 + mov.l r0, @r1 + + mov.l RTCOR_A, r1 + mov.l RTCOR_D, r0 + mov.l r0, @r1 + + mov.l SDCR_A, r1 + mov.l SDCR_D2, r0 + mov.l r0, @r1 + + 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: .long 0x1103 /* I:B:P=8:4:2 */ +WTCNT_D: .long 0x5A00 /* start counting at zero */ +WTCSR_D: .long 0xA507 /* divide by 4096 */ + +/* + * Spansion S29GL256N11 @ 48 MHz + */ +CS0BCR_D: .long 0x12490400 /* 1 idle cycle inserted, normal space, 16 bit */ +CS0WCR_D: .long 0x00000340 /* tSW=0.5ck, 6 wait cycles, NO external wait, tHW=0.5ck */ + +/* + * Samsung K4S511632B-UL75 @ 48 MHz + * Micron MT48LC32M16A2-75 @ 48 MHz + */ +CS3BCR_D: .long 0x10004400 /* CS3BCR = 0x10004400, minimum idle cycles, SDRAM, 16 bit */ +CS3WCR_D: .long 0x00000091 /* tRP=1ck, tRCD=1ck, CL=2, tRWL=2ck, tRC=4ck */ +SDCR_D1: .long 0x00000012 /* no refresh, 13 rows, 10 cols, NO bank active mode */ +SDCR_D2: .long 0x00000812 /* refresh */ +RTCSR_D: .long 0xA55A0008 /* 1/4, once */ +RTCNT_D: .long 0xA55A005D /* count 93 */ +RTCOR_D: .long 0xa55a005d /* count 93 */ +SDMR3_D: .long 0x440 /* mode register CL2, burst read and SINGLE WRITE */ + +/* + * 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 |