1 files changed, 525 insertions, 0 deletions

diff --git a/arch/arm/mach-omap1/sleep.S b/arch/arm/mach-omap1/sleep.S
new file mode 100644
index 000000000000..e58295e2d3b2
--- /dev/null
+++ b/arch/arm/mach-omap1/sleep.S
@@ -0,0 +1,525 @@
+/*
+ * linux/arch/arm/mach-omap1/sleep.S
+ *
+ * Low-level OMAP730/1510/1610 sleep/wakeUp support
+ *
+ * Initial SA1110 code:
+ * Copyright (c) 2001 Cliff Brake <cbrake@accelent.com>
+ *
+ * Adapted for PXA by Nicolas Pitre:
+ * Copyright (c) 2002 Monta Vista Software, Inc.
+ *
+ * Support for OMAP1510/1610 by Dirk Behme <dirk.behme@de.bosch.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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/config.h>
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/arch/io.h>
+#include <asm/arch/pm.h>
+
+                .text
+
+/*
+ * Forces OMAP into idle state
+ *
+ * omapXXXX_idle_loop_suspend()
+ *
+ * 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.
+ *
+ * Note: Because of slightly different configuration values we have
+ *       processor specific functions here.
+ */
+
+#if defined(CONFIG_ARCH_OMAP730)
+ENTRY(omap730_idle_loop_suspend)
+
+        stmfd   sp!, {r0 - r12, lr}             @ save registers on stack
+
+        @ load base address of ARM_IDLECT1 and ARM_IDLECT2
+        mov     r4, #CLKGEN_REG_ASM_BASE & 0xff000000
+        orr     r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000
+        orr     r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00
+
+        @ turn off clock domains
+        @ get ARM_IDLECT2 into r2
+        ldrh    r2, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
+        mov     r5, #OMAP730_IDLECT2_SLEEP_VAL & 0xff
+        orr     r5, r5, #OMAP730_IDLECT2_SLEEP_VAL & 0xff00
+        strh    r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
+
+        @ request ARM idle
+        @ get ARM_IDLECT1 into r1
+        ldrh    r1, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
+        orr     r3, r1, #OMAP730_IDLE_LOOP_REQUEST & 0xffff
+        strh    r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
+
+        mov     r5, #IDLE_WAIT_CYCLES & 0xff
+        orr     r5, r5, #IDLE_WAIT_CYCLES & 0xff00
+l_730:  subs    r5, r5, #1
+        bne     l_730
+/*
+ * Let's wait for the next clock tick to wake us up.
+ */
+        mov     r0, #0
+        mcr     p15, 0, r0, c7, c0, 4           @ wait for interrupt
+/*
+ * omap730_idle_loop_suspend()'s resume point.
+ *
+ * It will just start executing here, so we'll restore stuff from the
+ * stack, reset the ARM_IDLECT1 and ARM_IDLECT2.
+ */
+
+        @ restore ARM_IDLECT1 and ARM_IDLECT2 and return
+        @ r1 has ARM_IDLECT1 and r2 still has ARM_IDLECT2
+        strh    r2, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
+        strh    r1, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
+
+        ldmfd   sp!, {r0 - r12, pc}             @ restore regs and return
+
+ENTRY(omap730_idle_loop_suspend_sz)
+        .word   . - omap730_idle_loop_suspend
+#endif /* CONFIG_ARCH_OMAP730 */
+
+#ifdef CONFIG_ARCH_OMAP15XX
+ENTRY(omap1510_idle_loop_suspend)
+
+        stmfd   sp!, {r0 - r12, lr}             @ save registers on stack
+
+        @ load base address of ARM_IDLECT1 and ARM_IDLECT2
+        mov     r4, #CLKGEN_REG_ASM_BASE & 0xff000000
+        orr     r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000
+        orr     r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00
+
+        @ turn off clock domains
+        @ get ARM_IDLECT2 into r2
+        ldrh    r2, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
+        mov     r5, #OMAP1510_IDLE_CLOCK_DOMAINS & 0xff
+        orr     r5, r5, #OMAP1510_IDLE_CLOCK_DOMAINS & 0xff00
+        strh    r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
+
+        @ request ARM idle
+        @ get ARM_IDLECT1 into r1
+        ldrh    r1, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
+        orr     r3, r1, #OMAP1510_IDLE_LOOP_REQUEST & 0xffff
+        strh    r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
+
+        mov     r5, #IDLE_WAIT_CYCLES & 0xff
+        orr     r5, r5, #IDLE_WAIT_CYCLES & 0xff00
+l_1510: subs    r5, r5, #1
+        bne     l_1510
+/*
+ * Let's wait for the next clock tick to wake us up.
+ */
+        mov     r0, #0
+        mcr     p15, 0, r0, c7, c0, 4           @ wait for interrupt
+/*
+ * omap1510_idle_loop_suspend()'s resume point.
+ *
+ * It will just start executing here, so we'll restore stuff from the
+ * stack, reset the ARM_IDLECT1 and ARM_IDLECT2.
+ */
+
+        @ restore ARM_IDLECT1 and ARM_IDLECT2 and return
+        @ r1 has ARM_IDLECT1 and r2 still has ARM_IDLECT2
+        strh    r2, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
+        strh    r1, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
+
+        ldmfd   sp!, {r0 - r12, pc}             @ restore regs and return
+
+ENTRY(omap1510_idle_loop_suspend_sz)
+        .word   . - omap1510_idle_loop_suspend
+#endif /* CONFIG_ARCH_OMAP15XX */
+
+#if defined(CONFIG_ARCH_OMAP16XX)
+ENTRY(omap1610_idle_loop_suspend)
+
+        stmfd   sp!, {r0 - r12, lr}             @ save registers on stack
+
+        @ load base address of ARM_IDLECT1 and ARM_IDLECT2
+        mov     r4, #CLKGEN_REG_ASM_BASE & 0xff000000
+        orr     r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000
+        orr     r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00
+
+        @ turn off clock domains
+        @ get ARM_IDLECT2 into r2
+        ldrh    r2, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
+        mov     r5, #OMAP1610_IDLECT2_SLEEP_VAL & 0xff
+        orr     r5, r5, #OMAP1610_IDLECT2_SLEEP_VAL & 0xff00
+        strh    r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
+
+        @ request ARM idle
+        @ get ARM_IDLECT1 into r1
+        ldrh    r1, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
+        orr     r3, r1, #OMAP1610_IDLE_LOOP_REQUEST & 0xffff
+        strh    r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
+
+        mov     r5, #IDLE_WAIT_CYCLES & 0xff
+        orr     r5, r5, #IDLE_WAIT_CYCLES & 0xff00
+l_1610: subs    r5, r5, #1
+        bne     l_1610
+/*
+ * Let's wait for the next clock tick to wake us up.
+ */
+        mov     r0, #0
+        mcr     p15, 0, r0, c7, c0, 4           @ wait for interrupt
+/*
+ * omap1610_idle_loop_suspend()'s resume point.
+ *
+ * It will just start executing here, so we'll restore stuff from the
+ * stack, reset the ARM_IDLECT1 and ARM_IDLECT2.
+ */
+
+        @ restore ARM_IDLECT1 and ARM_IDLECT2 and return
+        @ r1 has ARM_IDLECT1 and r2 still has ARM_IDLECT2
+        strh    r2, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
+        strh    r1, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
+
+        ldmfd   sp!, {r0 - r12, pc}             @ restore regs and return
+
+ENTRY(omap1610_idle_loop_suspend_sz)
+        .word   . - omap1610_idle_loop_suspend
+#endif /* CONFIG_ARCH_OMAP16XX */
+
+/*
+ * Forces OMAP into deep sleep state
+ *
+ * omapXXXX_cpu_suspend()
+ *
+ * The values of the registers ARM_IDLECT1 and ARM_IDLECT2 are passed
+ * as arg0 and arg1 from caller. arg0 is stored in register r0 and arg1
+ * in register r1.
+ *
+ * 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.
+ *
+ * Note: Because of errata work arounds we have processor specific functions
+ *       here. They are mostly the same, but slightly different.
+ *
+ */
+
+#if defined(CONFIG_ARCH_OMAP730)
+ENTRY(omap730_cpu_suspend)
+
+        @ save registers on stack
+        stmfd   sp!, {r0 - r12, lr}
+
+        @ Drain write cache
+        mov     r4, #0
+        mcr     p15, 0, r0, c7, c10, 4
+        nop
+
+        @ load base address of Traffic Controller
+        mov     r6, #TCMIF_ASM_BASE & 0xff000000
+        orr     r6, r6, #TCMIF_ASM_BASE & 0x00ff0000
+        orr     r6, r6, #TCMIF_ASM_BASE & 0x0000ff00
+
+        @ prepare to put SDRAM into self-refresh manually
+        ldr     r7, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff]
+        orr     r9, r7, #SELF_REFRESH_MODE & 0xff000000
+        orr     r9, r9, #SELF_REFRESH_MODE & 0x000000ff
+        str     r9, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff]
+
+        @ prepare to put EMIFS to Sleep
+        ldr     r8, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff]
+        orr     r9, r8, #IDLE_EMIFS_REQUEST & 0xff
+        str     r9, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff]
+
+        @ load base address of ARM_IDLECT1 and ARM_IDLECT2
+        mov     r4, #CLKGEN_REG_ASM_BASE & 0xff000000
+        orr     r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000
+        orr     r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00
+
+        @ turn off clock domains
+        @ do not disable PERCK (0x04)
+        mov     r5, #OMAP730_IDLECT2_SLEEP_VAL & 0xff
+        orr     r5, r5, #OMAP730_IDLECT2_SLEEP_VAL & 0xff00
+        strh    r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
+
+        @ request ARM idle
+        mov     r3, #OMAP730_IDLECT1_SLEEP_VAL & 0xff
+        orr     r3, r3, #OMAP730_IDLECT1_SLEEP_VAL & 0xff00
+        strh    r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
+
+        @ disable instruction cache
+        mrc     p15, 0, r9, c1, c0, 0
+        bic     r2, r9, #0x1000
+        mcr     p15, 0, r2, c1, c0, 0
+        nop
+
+/*
+ * Let's wait for the next wake up event to wake us up. r0 can't be
+ * used here because r0 holds ARM_IDLECT1
+ */
+        mov     r2, #0
+        mcr     p15, 0, r2, c7, c0, 4           @ wait for interrupt
+/*
+ * omap730_cpu_suspend()'s resume point.
+ *
+ * It will just start executing here, so we'll restore stuff from the
+ * stack.
+ */
+        @ re-enable Icache
+        mcr     p15, 0, r9, c1, c0, 0
+
+        @ reset the ARM_IDLECT1 and ARM_IDLECT2.
+        strh    r1, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
+        strh    r0, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
+
+        @ Restore EMIFF controls
+        str     r7, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff]
+        str     r8, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff]
+
+        @ restore regs and return
+        ldmfd   sp!, {r0 - r12, pc}
+
+ENTRY(omap730_cpu_suspend_sz)
+        .word   . - omap730_cpu_suspend
+#endif /* CONFIG_ARCH_OMAP730 */
+
+#ifdef CONFIG_ARCH_OMAP15XX
+ENTRY(omap1510_cpu_suspend)
+
+        @ save registers on stack
+        stmfd   sp!, {r0 - r12, lr}
+
+        @ load base address of Traffic Controller
+        mov     r4, #TCMIF_ASM_BASE & 0xff000000
+        orr     r4, r4, #TCMIF_ASM_BASE & 0x00ff0000
+        orr     r4, r4, #TCMIF_ASM_BASE & 0x0000ff00
+
+        @ work around errata of OMAP1510 PDE bit for TC shut down
+        @ clear PDE bit
+        ldr     r5, [r4, #EMIFS_CONFIG_ASM_OFFSET & 0xff]
+        bic     r5, r5, #PDE_BIT & 0xff
+        str     r5, [r4, #EMIFS_CONFIG_ASM_OFFSET & 0xff]
+
+        @ set PWD_EN bit
+        and     r5, r5, #PWD_EN_BIT & 0xff
+        str     r5, [r4, #EMIFS_CONFIG_ASM_OFFSET & 0xff]
+
+        @ prepare to put SDRAM into self-refresh manually
+        ldr     r5, [r4, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff]
+        orr     r5, r5, #SELF_REFRESH_MODE & 0xff000000
+        orr     r5, r5, #SELF_REFRESH_MODE & 0x000000ff
+        str     r5, [r4, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff]
+
+        @ prepare to put EMIFS to Sleep
+        ldr     r5, [r4, #EMIFS_CONFIG_ASM_OFFSET & 0xff]
+        orr     r5, r5, #IDLE_EMIFS_REQUEST & 0xff
+        str     r5, [r4, #EMIFS_CONFIG_ASM_OFFSET & 0xff]
+
+        @ load base address of ARM_IDLECT1 and ARM_IDLECT2
+        mov     r4, #CLKGEN_REG_ASM_BASE & 0xff000000
+        orr     r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000
+        orr     r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00
+
+        @ turn off clock domains
+        mov     r5, #OMAP1510_IDLE_CLOCK_DOMAINS & 0xff
+        orr     r5, r5, #OMAP1510_IDLE_CLOCK_DOMAINS & 0xff00
+        strh    r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
+
+        @ request ARM idle
+        mov     r3, #OMAP1510_DEEP_SLEEP_REQUEST & 0xff
+        orr     r3, r3, #OMAP1510_DEEP_SLEEP_REQUEST & 0xff00
+        strh    r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
+
+        mov     r5, #IDLE_WAIT_CYCLES & 0xff
+        orr     r5, r5, #IDLE_WAIT_CYCLES & 0xff00
+l_1510_2:
+        subs    r5, r5, #1
+        bne     l_1510_2
+/*
+ * Let's wait for the next wake up event to wake us up. r0 can't be
+ * used here because r0 holds ARM_IDLECT1
+ */
+        mov     r2, #0
+        mcr     p15, 0, r2, c7, c0, 4           @ wait for interrupt
+/*
+ * omap1510_cpu_suspend()'s resume point.
+ *
+ * It will just start executing here, so we'll restore stuff from the
+ * stack, reset the ARM_IDLECT1 and ARM_IDLECT2.
+ */
+        strh    r1, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
+        strh    r0, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
+
+        @ restore regs and return
+        ldmfd   sp!, {r0 - r12, pc}
+
+ENTRY(omap1510_cpu_suspend_sz)
+        .word   . - omap1510_cpu_suspend
+#endif /* CONFIG_ARCH_OMAP15XX */
+
+#if defined(CONFIG_ARCH_OMAP16XX)
+ENTRY(omap1610_cpu_suspend)
+
+        @ save registers on stack
+        stmfd   sp!, {r0 - r12, lr}
+
+        @ Drain write cache
+        mov     r4, #0
+        mcr     p15, 0, r0, c7, c10, 4
+        nop
+
+        @ Load base address of Traffic Controller
+        mov     r6, #TCMIF_ASM_BASE & 0xff000000
+        orr     r6, r6, #TCMIF_ASM_BASE & 0x00ff0000
+        orr     r6, r6, #TCMIF_ASM_BASE & 0x0000ff00
+
+        @ Prepare to put SDRAM into self-refresh manually
+        ldr     r7, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff]
+        orr     r9, r7, #SELF_REFRESH_MODE & 0xff000000
+        orr     r9, r9, #SELF_REFRESH_MODE & 0x000000ff
+        str     r9, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff]
+
+        @ Prepare to put EMIFS to Sleep
+        ldr     r8, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff]
+        orr     r9, r8, #IDLE_EMIFS_REQUEST & 0xff
+        str     r9, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff]
+
+        @ Load base address of ARM_IDLECT1 and ARM_IDLECT2
+        mov     r4, #CLKGEN_REG_ASM_BASE & 0xff000000
+        orr     r4, r4, #CLKGEN_REG_ASM_BASE & 0x00ff0000
+        orr     r4, r4, #CLKGEN_REG_ASM_BASE & 0x0000ff00
+
+        @ Turn off clock domains
+        @ Do not disable PERCK (0x04)
+        mov     r5, #OMAP1610_IDLECT2_SLEEP_VAL & 0xff
+        orr     r5, r5, #OMAP1610_IDLECT2_SLEEP_VAL & 0xff00
+        strh    r5, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
+
+        @ Request ARM idle
+        mov     r3, #OMAP1610_IDLECT1_SLEEP_VAL & 0xff
+        orr     r3, r3, #OMAP1610_IDLECT1_SLEEP_VAL & 0xff00
+        strh    r3, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
+
+/*
+ * Let's wait for the next wake up event to wake us up. r0 can't be
+ * used here because r0 holds ARM_IDLECT1
+ */
+        mov     r2, #0
+        mcr     p15, 0, r2, c7, c0, 4           @ wait for interrupt
+
+        @ Errata (HEL3SU467, section 1.4.4) specifies nop-instructions
+        @ according to this formula:
+        @ 2 + (4*DPLL_MULT)/DPLL_DIV/ARMDIV
+        @ Max DPLL_MULT = 18
+        @ DPLL_DIV = 1
+        @ ARMDIV = 1
+        @ => 74 nop-instructions
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop     @10
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop     @20
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop     @30
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop     @40
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop     @50
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop     @60
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop
+        nop     @70
+        nop
+        nop
+        nop
+        nop     @74
+/*
+ * omap1610_cpu_suspend()'s resume point.
+ *
+ * It will just start executing here, so we'll restore stuff from the
+ * stack.
+ */
+        @ Restore the ARM_IDLECT1 and ARM_IDLECT2.
+        strh    r1, [r4, #ARM_IDLECT2_ASM_OFFSET & 0xff]
+        strh    r0, [r4, #ARM_IDLECT1_ASM_OFFSET & 0xff]
+
+        @ Restore EMIFF controls
+        str     r7, [r6, #EMIFF_SDRAM_CONFIG_ASM_OFFSET & 0xff]
+        str     r8, [r6, #EMIFS_CONFIG_ASM_OFFSET & 0xff]
+
+        @ Restore regs and return
+        ldmfd   sp!, {r0 - r12, pc}
+
+ENTRY(omap1610_cpu_suspend_sz)
+        .word   . - omap1610_cpu_suspend
+#endif /* CONFIG_ARCH_OMAP16XX */