/*
* File: arch/blackfin/mach-common/dpmc.S
* Based on:
* Author: LG Soft India
*
* Created: ?
* Description: Watchdog Timer APIs
*
* Modified:
* Copyright 2004-2006 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
* 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, see the file COPYING, or write
* to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/linkage.h>
#include <asm/blackfin.h>
#include <asm/mach/irq.h>
.text
ENTRY(_unmask_wdog_wakeup_evt)
[--SP] = ( R7:0, P5:0 );
#if defined(CONFIG_BF561)
P0.H = hi(SICA_IWR1);
P0.L = lo(SICA_IWR1);
#else
P0.h = (SIC_IWR >> 16);
P0.l = (SIC_IWR & 0xFFFF);
#endif
R7 = [P0];
#if defined(CONFIG_BF561)
BITSET(R7, 27);
#else
BITSET(R7,(IRQ_WATCH - IVG7));
#endif
[P0] = R7;
SSYNC;
( R7:0, P5:0 ) = [SP++];
RTS;
.LWRITE_TO_STAT:
/* When watch dog timer is enabled, a write to STAT will load the
* contents of CNT to STAT
*/
R7 = 0x0000(z);
#if defined(CONFIG_BF561)
P0.h = (WDOGA_STAT >> 16);
P0.l = (WDOGA_STAT & 0xFFFF);
#else
P0.h = (WDOG_STAT >> 16);
P0.l = (WDOG_STAT & 0xFFFF);
#endif
[P0] = R7;
SSYNC;
JUMP .LSKIP_WRITE_TO_STAT;
ENTRY(_program_wdog_timer)
[--SP] = ( R7:0, P5:0 );
#if defined(CONFIG_BF561)
P0.h = (WDOGA_CNT >> 16);
P0.l = (WDOGA_CNT & 0xFFFF);
#else
P0.h = (WDOG_CNT >> 16);
P0.l = (WDOG_CNT & 0xFFFF);
#endif
[P0] = R0;
SSYNC;
#if defined(CONFIG_BF561)
P0.h = (WDOGA_CTL >> 16);
P0.l = (WDOGA_CTL & 0xFFFF);
#else
P0.h = (WDOG_CTL >> 16);
P0.l = (WDOG_CTL & 0xFFFF);
#endif
R7 = W[P0](Z);
CC = BITTST(R7,1);
if !CC JUMP .LWRITE_TO_STAT;
CC = BITTST(R7,2);
if !CC JUMP .LWRITE_TO_STAT;
.LSKIP_WRITE_TO_STAT:
#if defined(CONFIG_BF561)
P0.h = (WDOGA_CTL >> 16);
P0.l = (WDOGA_CTL & 0xFFFF);
#else
P0.h = (WDOG_CTL >> 16);
P0.l = (WDOG_CTL & 0xFFFF);
#endif
R7 = W[P0](Z);
BITCLR(R7,1); /* Enable GP event */
BITSET(R7,2);
W[P0] = R7.L;
SSYNC;
NOP;
R7 = W[P0](Z);
BITCLR(R7,4); /* Enable the wdog counter */
W[P0] = R7.L;
SSYNC;
( R7:0, P5:0 ) = [SP++];
RTS;
ENTRY(_clear_wdog_wakeup_evt)
[--SP] = ( R7:0, P5:0 );
#if defined(CONFIG_BF561)
P0.h = (WDOGA_CTL >> 16);
P0.l = (WDOGA_CTL & 0xFFFF);
#else
P0.h = (WDOG_CTL >> 16);
P0.l = (WDOG_CTL & 0xFFFF);
#endif
R7 = 0x0AD6(Z);
W[P0] = R7.L;
SSYNC;
R7 = W[P0](Z);
BITSET(R7,15);
W[P0] = R7.L;
SSYNC;
R7 = W[P0](Z);
BITSET(R7,1);
BITSET(R7,2);
W[P0] = R7.L;
SSYNC;
( R7:0, P5:0 ) = [SP++];
RTS;
ENTRY(_disable_wdog_timer)
[--SP] = ( R7:0, P5:0 );
#if defined(CONFIG_BF561)
P0.h = (WDOGA_CTL >> 16);
P0.l = (WDOGA_CTL & 0xFFFF);
#else
P0.h = (WDOG_CTL >> 16);
P0.l = (WDOG_CTL & 0xFFFF);
#endif
R7 = 0xAD6(Z);
W[P0] = R7.L;
SSYNC;
( R7:0, P5:0 ) = [SP++];
RTS;
#if !defined(CONFIG_BF561)
.section .l1.text
ENTRY(_sleep_mode)
[--SP] = ( R7:0, P5:0 );
[--SP] = RETS;
call _set_sic_iwr;
R0 = 0xFFFF (Z);
call _set_rtc_istat
P0.H = hi(PLL_CTL);
P0.L = lo(PLL_CTL);
R1 = W[P0](z);
BITSET (R1, 3);
W[P0] = R1.L;
CLI R2;
SSYNC;
IDLE;
STI R2;
call _test_pll_locked;
R0 = IWR_ENABLE(0);
call _set_sic_iwr;
P0.H = hi(PLL_CTL);
P0.L = lo(PLL_CTL);
R7 = w[p0](z);
BITCLR (R7, 3);
BITCLR (R7, 5);
w[p0] = R7.L;
IDLE;
call _test_pll_locked;
RETS = [SP++];
( R7:0, P5:0 ) = [SP++];
RTS;
ENTRY(_hibernate_mode)
[--SP] = ( R7:0, P5:0 );
[--SP] = RETS;
call _set_sic_iwr;
R0 = 0xFFFF (Z);
call _set_rtc_istat
P0.H = hi(VR_CTL);
P0.L = lo(VR_CTL);
R1 = W[P0](z);
BITSET (R1, 8);
BITCLR (R1, 0);
BITCLR (R1, 1);
W[P0] = R1.L;
SSYNC;
CLI R2;
IDLE;
/* Actually, adding anything may not be necessary...SDRAM contents
* are lost
*/
ENTRY(_deep_sleep)
[--SP] = ( R7:0, P5:0 );
[--SP] = RETS;
CLI R4;
call _set_sic_iwr;
call _set_sdram_srfs;
/* Clear all the interrupts,bits sticky */
R0 = 0xFFFF (Z);
call _set_rtc_istat
P0.H = hi(PLL_CTL);
P0.L = lo(PLL_CTL);
R0 = W[P0](z);
BITSET (R0, 5);
W[P0] = R0.L;
call _test_pll_locked;
SSYNC;
IDLE;
call _unset_sdram_srfs;
call _test_pll_locked;
R0 = IWR_ENABLE(0);
call _set_sic_iwr;
P0.H = hi(PLL_CTL);
P0.L = lo(PLL_CTL);
R0 = w[p0](z);
BITCLR (R0, 3);
BITCLR (R0, 5);
BITCLR (R0, 8);
w[p0] = R0;
IDLE;
call _test_pll_locked;
STI R4;
RETS = [SP++];
( R7:0, P5:0 ) = [SP++];
RTS;
ENTRY(_sleep_deeper)
[--SP] = ( R7:0, P5:0 );
[--SP] = RETS;
CLI R4;
P3 = R0;
R0 = IWR_ENABLE(0);
call _set_sic_iwr;
call _set_sdram_srfs;
/* Clear all the interrupts,bits sticky */
R0 = 0xFFFF (Z);
call _set_rtc_istat
P0.H = hi(PLL_DIV);
P0.L = lo(PLL_DIV);
R6 = W[P0](z);
R0.L = 0xF;
W[P0] = R0.l;
P0.H = hi(PLL_CTL);
P0.L = lo(PLL_CTL);
R5 = W[P0](z);
R0.L = (MIN_VC/CONFIG_CLKIN_HZ) << 9;
W[P0] = R0.l;
SSYNC;
IDLE;
call _test_pll_locked;
P0.H = hi(VR_CTL);
P0.L = lo(VR_CTL);
R7 = W[P0](z);
R1 = 0x6;
R1 <<= 16;
R2 = 0x0404(Z);
R1 = R1|R2;
R2 = DEPOSIT(R7, R1);
W[P0] = R2;
SSYNC;
IDLE;
call _test_pll_locked;
P0.H = hi(PLL_CTL);
P0.L = lo(PLL_CTL);
R0 = W[P0](z);
BITSET (R0, 3);
W[P0] = R0.L;
R0 = P3;
call _set_sic_iwr;
SSYNC;
IDLE;
call _test_pll_locked;
R0 = IWR_ENABLE(0);
call _set_sic_iwr;
P0.H = hi(VR_CTL);
P0.L = lo(VR_CTL);
W[P0]= R7;
SSYNC;
IDLE;
call _test_pll_locked;
P0.H = hi(PLL_DIV);
P0.L = lo(PLL_DIV);
W[P0]= R6;
P0.H = hi(PLL_CTL);
P0.L = lo(PLL_CTL);
w[p0] = R5;
IDLE;
call _test_pll_locked;
call _unset_sdram_srfs;
STI R4;
RETS = [SP++];
( R7:0, P5:0 ) = [SP++];
RTS;
ENTRY(_set_sdram_srfs)
/* set the sdram to self refresh mode */
P0.H = hi(EBIU_SDGCTL);
P0.L = lo(EBIU_SDGCTL);
R2 = [P0];
R3.H = hi(SRFS);
R3.L = lo(SRFS);
R2 = R2|R3;
[P0] = R2;
ssync;
RTS;
ENTRY(_unset_sdram_srfs)
/* set the sdram out of self refresh mode */
P0.H = hi(EBIU_SDGCTL);
P0.L = lo(EBIU_SDGCTL);
R2 = [P0];
R3.H = hi(SRFS);
R3.L = lo(SRFS);
R3 = ~R3;
R2 = R2&R3;
[P0] = R2;
ssync;
RTS;
ENTRY(_set_sic_iwr)
P0.H = hi(SIC_IWR);
P0.L = lo(SIC_IWR);
[P0] = R0;
SSYNC;
RTS;
ENTRY(_set_rtc_istat)
P0.H = hi(RTC_ISTAT);
P0.L = lo(RTC_ISTAT);
w[P0] = R0.L;
SSYNC;
RTS;
ENTRY(_test_pll_locked)
P0.H = hi(PLL_STAT);
P0.L = lo(PLL_STAT);
1:
R0 = W[P0] (Z);
CC = BITTST(R0,5);
IF !CC JUMP 1b;
RTS;
#endif
