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Diffstat (limited to 'arch/arm/mach-omap2/sleep.S')
| -rw-r--r-- | arch/arm/mach-omap2/sleep.S | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/arch/arm/mach-omap2/sleep.S b/arch/arm/mach-omap2/sleep.S deleted file mode 100644 index 87a706fd5f8..00000000000 --- a/arch/arm/mach-omap2/sleep.S +++ /dev/null @@ -1,128 +0,0 @@ -/* - * linux/arch/arm/mach-omap2/sleep.S - * - * (C) Copyright 2004 - * Texas Instruments, <www.ti.com> - * Richard Woodruff <r-woodruff2@ti.com> - * - * 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 <linux/linkage.h> -#include <asm/assembler.h> -#include <mach/io.h> -#include <mach/pm.h> - -#include "sdrc.h" - -/* First address of reserved address space? apparently valid for OMAP2 & 3 */ -#define A_SDRC0_V (0xC0000000) - - .text - -/* - * Forces OMAP into idle state - * - * omap24xx_idle_loop_suspend() - This bit of code just executes the WFI - * for normal idles. - * - * Note: This code get's copied to internal SRAM at boot. When the OMAP - * wakes up it continues execution at the point it went to sleep. - */ -ENTRY(omap24xx_idle_loop_suspend) - stmfd sp!, {r0, lr} @ save registers on stack - mov r0, #0 @ clear for mcr setup - mcr p15, 0, r0, c7, c0, 4 @ wait for interrupt - ldmfd sp!, {r0, pc} @ restore regs and return - -ENTRY(omap24xx_idle_loop_suspend_sz) - .word . - omap24xx_idle_loop_suspend - -/* - * omap242x_cpu_suspend() - Forces OMAP into deep sleep state by completing - * SDRC shutdown then ARM shutdown. Upon wake MPU is back on so just restore - * SDRC. - * - * Input: - * R0 : DLL ctrl value pre-Sleep - * R1 : Processor+Revision - * 2420: 0x21 = 242xES1, 0x26 = 242xES2.2 - * 2430: 0x31 = 2430ES1, 0x32 = 2430ES2 - * - * The if the DPLL is going to AutoIdle. It seems like the DPLL may be back on - * when we get called, but the DLL probably isn't. We will wait a bit more in - * case the DPLL isn't quite there yet. The code will wait on DLL for DDR even - * if in unlocked mode. - * - * For less than 242x-ES2.2 upon wake from a sleep mode where the external - * oscillator was stopped, a timing bug exists where a non-stabilized 12MHz - * clock can pass into the PRCM can cause problems at DSP and IVA. - * To work around this the code will switch to the 32kHz source prior to sleep. - * Post sleep we will shift back to using the DPLL. Apparently, - * CM_IDLEST_CLKGEN does not reflect the full clock change so you need to wait - * 3x12MHz + 3x32kHz clocks for a full switch. - * - * The DLL load value is not kept in RETENTION or OFF. It needs to be restored - * at wake - */ -ENTRY(omap24xx_cpu_suspend) - stmfd sp!, {r0 - r12, lr} @ save registers on stack - mov r3, #0x0 @ clear for mrc call - mcr p15, 0, r3, c7, c10, 4 @ memory barrier, hope SDR/DDR finished - nop - nop - ldr r3, A_SDRC_POWER @ addr of sdrc power - ldr r4, [r3] @ value of sdrc power - orr r4, r4, #0x40 @ enable self refresh on idle req - mov r5, #0x2000 @ set delay (DPLL relock + DLL relock) - str r4, [r3] @ make it so - mov r2, #0 - nop - mcr p15, 0, r2, c7, c0, 4 @ wait for interrupt - nop -loop: - subs r5, r5, #0x1 @ awake, wait just a bit - bne loop - - /* The DPLL has on before we take the DDR out of self refresh */ - bic r4, r4, #0x40 @ now clear self refresh bit. - str r4, [r3] @ put vlaue back. - ldr r4, A_SDRC0 @ make a clock happen - ldr r4, [r4] - nop @ start auto refresh only after clk ok - movs r0, r0 @ see if DDR or SDR - ldrne r1, A_SDRC_DLLA_CTRL_S @ get addr of DLL ctrl - strne r0, [r1] @ rewrite DLLA to force DLL reload - addne r1, r1, #0x8 @ move to DLLB - strne r0, [r1] @ rewrite DLLB to force DLL reload - - mov r5, #0x1000 -loop2: - subs r5, r5, #0x1 - bne loop2 - /* resume*/ - ldmfd sp!, {r0 - r12, pc} @ restore regs and return - -A_SDRC_POWER: - .word OMAP242X_SDRC_REGADDR(SDRC_POWER) -A_SDRC0: - .word A_SDRC0_V -A_SDRC_DLLA_CTRL_S: - .word OMAP242X_SDRC_REGADDR(SDRC_DLLA_CTRL) - -ENTRY(omap24xx_cpu_suspend_sz) - .word . - omap24xx_cpu_suspend - |