diff options
Diffstat (limited to 'board/adsvix/pxavoltage.S')
| -rw-r--r-- | board/adsvix/pxavoltage.S | 230 |
1 files changed, 0 insertions, 230 deletions
diff --git a/board/adsvix/pxavoltage.S b/board/adsvix/pxavoltage.S deleted file mode 100644 index 2fe1cabd7c..0000000000 --- a/board/adsvix/pxavoltage.S +++ /dev/null @@ -1,230 +0,0 @@ -/* - * (C) Copyright 2004 - * Robert Whaley, Applied Data Systems, Inc. rwhaley@applieddata.net - * - * 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 <asm/arch/pxa-regs.h> - -#define LTC1663_ADDR 0x20 - -#define LTC1663_SY 0x01 /* Sync ACK */ -#define LTC1663_SD 0x04 /* shutdown */ -#define LTC1663_BG 0x04 /* Internal Voltage Ref */ - -#define VOLT_1_55 18 /* DAC value for 1.55V */ - - .global initPXAvoltage - -@ Set the voltage to 1.55V early in the boot process so we can run -@ at a high clock speed and boot quickly. Note that this is necessary -@ because the reset button does not reset the CPU voltage, so if the -@ voltage was low (say 0.85V) then the CPU would crash without this -@ routine - -@ This routine clobbers r0-r4 - -initializei2c: - - ldr r2, =CKEN - ldr r3, [r2] - orr r3, r3, #CKEN15_PWRI2C - str r3, [r2] - - ldr r2, =PCFR - ldr r3, [r2] - orr r3, r3, #PCFR_PI2C_EN - str r3, [r2] - - /* delay for about 250msec - */ - ldr r3, =OSCR - mov r2, #0 - str r2, [r3] - ldr r1, =0xC0000 - -1: - ldr r2, [r3] - cmp r1, r2 - bgt 1b - ldr r0, =PWRICR - ldr r1, [r0] - bic r1, r1, #(ICR_MA | ICR_START | ICR_STOP) - str r1, [r0] - - orr r1, r1, #ICR_UR - str r1, [r0] - - ldr r2, =PWRISR - ldr r3, =0x7ff - str r3, [r2] - - bic r1, r1, #ICR_UR - str r1, [r0] - - mov r1, #(ICR_GCD | ICR_SCLE) - str r1, [r0] - - orr r1, r1, #ICR_IUE - str r1, [r0] - - orr r1, r1, #ICR_FM - str r1, [r0] - - /* delay for about 1msec - */ - ldr r3, =OSCR - mov r2, #0 - str r2, [r3] - ldr r1, =0xC00 - -1: - ldr r2, [r3] - cmp r1, r2 - bgt 1b - mov pc, lr - -sendbytei2c: - ldr r3, =PWRIDBR - str r0, [r3] - ldr r3, =PWRICR - ldr r0, [r3] - orr r0, r0, r1 - bic r0, r0, r2 - str r0, [r3] - orr r0, r0, #ICR_TB - str r0, [r3] - - mov r2, #0x100000 - -waitfortxemptyi2c: - - ldr r0, =PWRISR - ldr r1, [r0] - - /* take it from the top if we don't get empty after a while */ - subs r2, r2, #1 - moveq lr, r4 - beq initPXAvoltage - - tst r1, #ISR_ITE - - beq waitfortxemptyi2c - - orr r1, r1, #ISR_ITE - str r1, [r0] - - mov pc, lr - -initPXAvoltage: - - mov r4, lr - - bl setleds - - bl initializei2c - - bl setleds - - /* now send the real message to set the correct voltage */ - ldr r0, =LTC1663_ADDR - mov r0, r0, LSL #1 - mov r1, #ICR_START - ldr r2, =(ICR_STOP | ICR_ALDIE | ICR_ACKNAK) - bl sendbytei2c - - bl setleds - - mov r0, #LTC1663_BG - mov r1, #0 - mov r2, #(ICR_STOP | ICR_START) - bl sendbytei2c - - bl setleds - - ldr r0, =VOLT_1_55 - and r0, r0, #0xff - mov r1, #0 - mov r2, #(ICR_STOP | ICR_START) - bl sendbytei2c - - bl setleds - - ldr r0, =VOLT_1_55 - mov r0, r0, ASR #8 - and r0, r0, #0xff - mov r1, #ICR_STOP - mov r2, #ICR_START - bl sendbytei2c - - bl setleds - - @ delay a little for the volatage to stablize - ldr r3, =OSCR - mov r2, #0 - str r2, [r3] - ldr r1, =0xC0 - -1: - ldr r2, [r3] - cmp r1, r2 - bgt 1b - mov pc, r4 - -setleds: - mov pc, lr - - ldr r5, =0x40e00058 - ldr r3, [r5] - bic r3, r3, #0x3 - str r3, [r5] - ldr r5, =0x40e0000c - ldr r3, [r5] - orr r3, r3, #0x00010000 - str r3, [r5] - - @ inner loop - mov r0, #0x2 -1: - - ldr r5, =0x40e00018 - mov r3, #0x00010000 - str r3, [r5] - - @ outer loop - mov r3, #0x00F00000 -2: - subs r3, r3, #1 - bne 2b - - ldr r5, =0x40e00024 - mov r3, #0x00010000 - str r3, [r5] - - @ outer loop - mov r3, #0x00F00000 -3: - subs r3, r3, #1 - bne 3b - - subs r0, r0, #1 - bne 1b - - mov pc, lr |