From: Manuel Lauss <mano@xxxxxxxxxxxxxxxxxxxxxxx>
- Make PM code compile on Au1200.
- sleep code for Au1200/Au1550.
Signed-off-by: Manuel Lauss <mano@xxxxxxxxxxxxxxxxxxxxxxx>
---
arch/mips/au1000/common/platform.c | 5 +-
arch/mips/au1000/common/power.c | 111 +++++++++++++++++++++------------
arch/mips/au1000/common/sleeper.S | 121 ++++++++++++++++++++++--------------
3 files changed, 150 insertions(+), 87 deletions(-)
diff --git a/arch/mips/au1000/common/platform.c b/arch/mips/au1000/common/platform.c
index bb08d51..e5712b7 100644
--- a/arch/mips/au1000/common/platform.c
+++ b/arch/mips/au1000/common/platform.c
@@ -419,6 +419,7 @@ static int pm_do_sleep(ctl_table *ctl, int write, struct file *file,
return 0;
}
+#if !defined(CONFIG_SOC_AU1200) && !defined(CONFIG_SOC_AU1550)
/*
* This is the number of bits of precision for the loops_per_jiffy.
* Each bit takes on average 1.5/HZ seconds. This (like the original)
@@ -566,7 +567,7 @@ static int pm_do_freq(ctl_table *ctl, int write, struct file *file,
return retval;
}
-
+#endif
static struct ctl_table pm_table[] = {
{
@@ -577,6 +578,7 @@ static struct ctl_table pm_table[] = {
.mode = 0600,
.proc_handler = &pm_do_sleep
},
+#if !defined(CONFIG_SOC_AU1200) && !defined(CONFIG_SOC_AU1550)
{
.ctl_name = CTL_UNNUMBERED,
.procname = "freq",
@@ -585,6 +587,7 @@ static struct ctl_table pm_table[] = {
.mode = 0600,
.proc_handler = &pm_do_freq
},
+#endif
{}
};
diff --git a/arch/mips/au1000/common/power.c b/arch/mips/au1000/common/power.c
index 4b0f6a1..ba4c946 100644
--- a/arch/mips/au1000/common/power.c
+++ b/arch/mips/au1000/common/power.c
@@ -26,13 +26,13 @@
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#include <linux/init.h>
-#include <asm/cacheflush.h>
-#include <asm/mach-au1x00/au1000.h>
-
#ifdef CONFIG_PM
+#include <asm/mach-au1x00/au1000.h>
+
extern void save_and_sleep(void);
+extern void save_au1xxx_intctl(void);
+extern void restore_au1xxx_intctl(void);
/*
* We need to save/restore a bunch of core registers that are
@@ -44,23 +44,18 @@ extern void save_and_sleep(void);
* We only have to save/restore registers that aren't otherwise
* done as part of a driver pm_* function.
*/
-static unsigned int sleep_aux_pll_cntrl;
-static unsigned int sleep_cpu_pll_cntrl;
-static unsigned int sleep_pin_function;
-static unsigned int sleep_uart0_inten;
-static unsigned int sleep_uart0_fifoctl;
-static unsigned int sleep_uart0_linectl;
-static unsigned int sleep_uart0_clkdiv;
-static unsigned int sleep_uart0_enable;
-static unsigned int sleep_usbhost_enable;
-static unsigned int sleep_usbdev_enable;
-static unsigned int sleep_static_memctlr[4][3];
+static unsigned int sleep_uart0_inten;
+static unsigned int sleep_uart0_fifoctl;
+static unsigned int sleep_uart0_linectl;
+static unsigned int sleep_uart0_clkdiv;
+static unsigned int sleep_uart0_enable;
+static unsigned int sleep_usb[2];
+static unsigned int sleep_sys_clocks[5];
+static unsigned int sleep_sys_pinfunc;
+static unsigned int sleep_static_memctlr[4][3];
static void save_core_regs(void)
{
- extern void save_au1xxx_intctl(void);
- extern void pm_eth0_shutdown(void);
-
/*
* Do the serial ports.....these really should be a pm_*
* registered function by the driver......but of course the
@@ -72,31 +67,45 @@ static void save_core_regs(void)
sleep_uart0_linectl = au_readl(UART0_ADDR + UART_LCR);
sleep_uart0_clkdiv = au_readl(UART0_ADDR + UART_CLK);
sleep_uart0_enable = au_readl(UART0_ADDR + UART_MOD_CNTRL);
+ au_sync();
+#ifndef CONFIG_SOC_AU1200
/* Shutdown USB host/device. */
- sleep_usbhost_enable = au_readl(USB_HOST_CONFIG);
+ sleep_usb[0] = au_readl(USB_HOST_CONFIG);
/* There appears to be some undocumented reset register.... */
- au_writel(0, 0xb0100004); au_sync();
- au_writel(0, USB_HOST_CONFIG); au_sync();
+ au_writel(0, 0xb0100004);
+ au_sync();
+ au_writel(0, USB_HOST_CONFIG);
+ au_sync();
+
+ sleep_usb[1] = au_readl(USBD_ENABLE);
+ au_writel(0, USBD_ENABLE);
+ au_sync();
- sleep_usbdev_enable = au_readl(USBD_ENABLE);
- au_writel(0, USBD_ENABLE); au_sync();
+#else /* AU1200 */
+
+ /* enable access to OTG mmio so we can save OTG CAP/MUX.
+ * FIXME: write an OTG driver and move this stuff there!
+ */
+ au_writel(au_readl(USB_MSR_BASE + 4) | (1 << 6), USB_MSR_BASE + 4);
+ au_sync();
+ sleep_usb[0] = au_readl(0xb4020020); /* OTG_CAP */
+ sleep_usb[1] = au_readl(0xb4020024); /* OTG_MUX */
+#endif
/* Save interrupt controller state. */
save_au1xxx_intctl();
/* Clocks and PLLs. */
- sleep_aux_pll_cntrl = au_readl(SYS_AUXPLL);
-
- /*
- * We don't really need to do this one, but unless we
- * write it again it won't have a valid value if we
- * happen to read it.
- */
- sleep_cpu_pll_cntrl = au_readl(SYS_CPUPLL);
+ sleep_sys_clocks[0] = au_readl(SYS_FREQCTRL0);
+ sleep_sys_clocks[1] = au_readl(SYS_FREQCTRL1);
+ sleep_sys_clocks[2] = au_readl(SYS_CLKSRC);
+ sleep_sys_clocks[3] = au_readl(SYS_CPUPLL);
+ sleep_sys_clocks[4] = au_readl(SYS_AUXPLL);
- sleep_pin_function = au_readl(SYS_PINFUNC);
+ /* pin mux config */
+ sleep_sys_pinfunc = au_readl(SYS_PINFUNC);
/* Save the static memory controller configuration. */
sleep_static_memctlr[0][0] = au_readl(MEM_STCFG0);
@@ -115,12 +124,37 @@ static void save_core_regs(void)
static void restore_core_regs(void)
{
- extern void restore_au1xxx_intctl(void);
- extern void wakeup_counter0_adjust(void);
-
- au_writel(sleep_aux_pll_cntrl, SYS_AUXPLL); au_sync();
- au_writel(sleep_cpu_pll_cntrl, SYS_CPUPLL); au_sync();
- au_writel(sleep_pin_function, SYS_PINFUNC); au_sync();
+ /* restore clock configuration. Writing CPUPLL last will
+ * stall a bit and stabilize other clocks (unless this is
+ * one of those Au1000 with a write-only PLL, where we dont
+ * have a valid value)
+ */
+ au_writel(sleep_sys_clocks[0], SYS_FREQCTRL0);
+ au_writel(sleep_sys_clocks[1], SYS_FREQCTRL1);
+ au_writel(sleep_sys_clocks[2], SYS_CLKSRC);
+ au_writel(sleep_sys_clocks[4], SYS_AUXPLL);
+ if (!au1xxx_cpu_has_pll_wo())
+ au_writel(sleep_sys_clocks[3], SYS_CPUPLL);
+ au_sync();
+
+ au_writel(sleep_sys_pinfunc, SYS_PINFUNC);
+ au_sync();
+
+#ifndef CONFIG_SOC_AU1200
+ au_writel(sleep_usb[0], USB_HOST_CONFIG);
+ au_writel(sleep_usb[1], USBD_ENABLE);
+ au_sync();
+#else
+ /* enable accces to OTG memory */
+ au_writel(au_readl(USB_MSR_BASE + 4) | (1 << 6), USB_MSR_BASE + 4);
+ au_sync();
+
+ /* restore OTG caps and port mux. */
+ au_writel(sleep_usb[0], 0xb4020020 + 0); /* OTG_CAP */
+ au_sync();
+ au_writel(sleep_usb[1], 0xb4020020 + 4); /* OTG_MUX */
+ au_sync();
+#endif
/* Restore the static memory controller configuration. */
au_writel(sleep_static_memctlr[0][0], MEM_STCFG0);
@@ -156,7 +190,6 @@ static void restore_core_regs(void)
void au_sleep(void)
{
save_core_regs();
- flush_cache_all();
save_and_sleep();
restore_core_regs();
}
diff --git a/arch/mips/au1000/common/sleeper.S b/arch/mips/au1000/common/sleeper.S
index 4b3cf02..76506aa 100644
--- a/arch/mips/au1000/common/sleeper.S
+++ b/arch/mips/au1000/common/sleeper.S
@@ -15,9 +15,11 @@
#include <asm/regdef.h>
#include <asm/stackframe.h>
+ .extern __flush_cache_all
+
.text
- .set macro
- .set noat
+ .set noreorder
+ .set noat
.align 5
/* Save all of the processor general registers and go to sleep.
@@ -33,14 +35,6 @@ LEAF(save_and_sleep)
sw $5, PT_R5(sp)
sw $6, PT_R6(sp)
sw $7, PT_R7(sp)
- sw $8, PT_R8(sp)
- sw $9, PT_R9(sp)
- sw $10, PT_R10(sp)
- sw $11, PT_R11(sp)
- sw $12, PT_R12(sp)
- sw $13, PT_R13(sp)
- sw $14, PT_R14(sp)
- sw $15, PT_R15(sp)
sw $16, PT_R16(sp)
sw $17, PT_R17(sp)
sw $18, PT_R18(sp)
@@ -49,12 +43,9 @@ LEAF(save_and_sleep)
sw $21, PT_R21(sp)
sw $22, PT_R22(sp)
sw $23, PT_R23(sp)
- sw $24, PT_R24(sp)
- sw $25, PT_R25(sp)
sw $26, PT_R26(sp)
sw $27, PT_R27(sp)
sw $28, PT_R28(sp)
- sw $29, PT_R29(sp)
sw $30, PT_R30(sp)
sw $31, PT_R31(sp)
mfc0 k0, CP0_STATUS
@@ -66,44 +57,89 @@ LEAF(save_and_sleep)
mfc0 k0, CP0_CONFIG
sw k0, 0x14(sp)
+ /* flush caches to make sure context is in memory */
+ la t1, __flush_cache_all
+ lw t0, 0(t1)
+ jal t0
+ nop
+
/* Now set up the scratch registers so the boot rom will
* return to this point upon wakeup.
+ * sys_scratch0 : SP
+ * sys_scratch1 : RA
*/
- la k0, 1f
- lui k1, 0xb190
- ori k1, 0x18
- sw sp, 0(k1)
- ori k1, 0x1c
- sw k0, 0(k1)
-
-/* Put SDRAM into self refresh. Preload instructions into cache,
- * issue a precharge, then auto refresh, then sleep commands to it.
- */
- la t0, sdsleep
+ li t3, 0xb1900000 /* sys_xxx */
+ sw sp, 0x0018(t3)
+ la k0, resume_from_sleep
+ sw k0, 0x001c(t3)
+
+ /* Put SDRAM into self refresh. Preload instructions into cache,
+ * issue a precharge, then auto refresh, then sleep commands to it.
+ */
+ la t0, sdsleep
.set mips3
- cache 0x14, 0(t0)
- cache 0x14, 32(t0)
- cache 0x14, 64(t0)
- cache 0x14, 96(t0)
+ cache 0x14, 0(t0)
+ cache 0x14, 32(t0)
+ cache 0x14, 64(t0)
+ cache 0x14, 96(t0)
.set mips0
sdsleep:
- lui k0, 0xb400
- sw zero, 0x001c(k0) /* Precharge */
- sw zero, 0x0020(k0) /* Auto refresh */
- sw zero, 0x0030(k0) /* SDRAM sleep */
+ li a0, 0xb4000000 /* mem_xxx */
+#if defined(CONFIG_SOC_AU1000) || defined(CONFIG_SOC_AU1100) || \
+ defined(CONFIG_SOC_AU1500)
+ sw zero, 0x001c(a0) /* Precharge */
+ sync
+ sw zero, 0x0020(a0) /* Auto Refresh */
+ sync
+ sw zero, 0x0030(a0) /* Sleep */
sync
+#endif
- lui k1, 0xb190
- sw zero, 0x0078(k1) /* get ready to sleep */
+#if defined(CONFIG_SOC_AU1550) || defined(CONFIG_SOC_AU1200)
+ sw zero, 0x08c0(a0) /* Precharge */
sync
- sw zero, 0x007c(k1) /* Put processor to sleep */
+ sw zero, 0x08d0(a0) /* Self Refresh */
sync
+ /* wait for sdram to enter self-refresh mode */
+ li t0, 0x01000000
+sref_wait_loop:
+ lw t1, 0x0850(a0) /* mem_sdstat */
+ and t2, t1, t0
+ beq t2, zero, sref_wait_loop
+ nop
+
+ /* Disable SDRAM clocks */
+ li t0, ~0x30000000
+ lw t1, 0x0840(a0) /* mem_sdconfiga */
+ and t1, t0, t1 /* clear CE[1:0] */
+ sw t1, 0x0840(a0) /* mem_sdconfiga */
+ sync
+#endif
+
+ /* put power supply and processor to sleep */
+ sw zero, 0x0078(t3) /* sys_slppwr */
+ sync
+ sw zero, 0x007c(t3) /* sys_sleep */
+ sync
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+
/* This is where we return upon wakeup.
* Reload all of the registers and return.
*/
-1: nop
+resume_from_sleep:
+ nop
+ .set nomacro
+ .set noat
+
lw k0, 0x20(sp)
mtc0 k0, CP0_STATUS
lw k0, 0x1c(sp)
@@ -117,6 +153,7 @@ sdsleep:
* the write-only Config[OD] bit and set it back to one...
*/
jal au1x00_fixup_config_od
+ nop
lw $1, PT_R1(sp)
lw $2, PT_R2(sp)
lw $3, PT_R3(sp)
@@ -124,14 +161,6 @@ sdsleep:
lw $5, PT_R5(sp)
lw $6, PT_R6(sp)
lw $7, PT_R7(sp)
- lw $8, PT_R8(sp)
- lw $9, PT_R9(sp)
- lw $10, PT_R10(sp)
- lw $11, PT_R11(sp)
- lw $12, PT_R12(sp)
- lw $13, PT_R13(sp)
- lw $14, PT_R14(sp)
- lw $15, PT_R15(sp)
lw $16, PT_R16(sp)
lw $17, PT_R17(sp)
lw $18, PT_R18(sp)
@@ -140,15 +169,13 @@ sdsleep:
lw $21, PT_R21(sp)
lw $22, PT_R22(sp)
lw $23, PT_R23(sp)
- lw $24, PT_R24(sp)
- lw $25, PT_R25(sp)
lw $26, PT_R26(sp)
lw $27, PT_R27(sp)
lw $28, PT_R28(sp)
- lw $29, PT_R29(sp)
lw $30, PT_R30(sp)
lw $31, PT_R31(sp)
addiu sp, PT_SIZE
jr ra
+ nop
END(save_and_sleep)
--
1.5.5.4
