Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm

* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (212 commits)
  [ARM] pxa: Phycore pcm-990-specific code for the PXA270 Quick Capture driver
  [ARM] pxa: V4L2 soc_camera driver for PXA270
  [ARM] pxa: restrict availability of pxa2xx PCMCIA drivers
  [ARM] 5005/1: BAST: Fix kset_name initialiser
  [ARM] 4967/1: Adds functions to set clkout rate for Samsung S3C2410
  [ARM] 4988/1: Add GPIO lib support to the EP93xx
  [ARM] Add initial sparsemem support
  [ARM] pxa: initialise PXA devices before platform init code
  [ARM] 5002/1: tosa: add two more leds
  [ARM] 5004/1: Tosa: make several unreferenced structures static.
  [ARM] 5003/1: Shut up sparse warnings
  [ARM] 4977/2: soc - pxa2xx-ac97 - Add missing clk_enable()
  [ARM] 4976/1: zylonite: Configure GPIO for WM9713 IRQ line
  [ARM] 4974/1: Drop unused leds-tosa.
  [ARM] 4973/1: Tosa: use leds-gpio driver.
  [ARM] 4972/1: Tosa: convert scoop GPIOs usage to generic gpio code
  [ARM] 4971/1: pxaficp_ir: provide startup and shutdown hooks
  [ARM] pxa: lubbock: move mis-placed SPI info
  [ARM] 4970/1: tosa: correct gpio used for wake up.
  [ARM] 4966/1: magician: add MFP pin configuration
  ...

1 files changed, 149 insertions, 16 deletions

diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c
index a67defd5043..39733b6992a 100644
--- a/arch/arm/mach-at91/pm.c
+++ b/arch/arm/mach-at91/pm.c
@@ -26,12 +26,135 @@
 #include <asm/mach-types.h>
 
 #include <asm/arch/at91_pmc.h>
-#include <asm/arch/at91rm9200_mc.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/cpu.h>
 
 #include "generic.h"
 
+#ifdef CONFIG_ARCH_AT91RM9200
+#include <asm/arch/at91rm9200_mc.h>
+
+/*
+ * The AT91RM9200 goes into self-refresh mode with this command, and will
+ * terminate self-refresh automatically on the next SDRAM access.
+ */
+#define sdram_selfrefresh_enable()	at91_sys_write(AT91_SDRAMC_SRR, 1)
+#define sdram_selfrefresh_disable()	do {} while (0)
+
+#elif defined(CONFIG_ARCH_AT91CAP9)
+#include <asm/arch/at91cap9_ddrsdr.h>
+
+static u32 saved_lpr;
+
+static inline void sdram_selfrefresh_enable(void)
+{
+	u32 lpr;
+
+	saved_lpr = at91_sys_read(AT91_DDRSDRC_LPR);
+
+	lpr = saved_lpr & ~AT91_DDRSDRC_LPCB;
+	at91_sys_write(AT91_DDRSDRC_LPR, lpr | AT91_DDRSDRC_LPCB_SELF_REFRESH);
+}
+
+#define sdram_selfrefresh_disable()	at91_sys_write(AT91_DDRSDRC_LPR, saved_lpr)
+
+#else
+#include <asm/arch/at91sam9_sdramc.h>
+
+static u32 saved_lpr;
+
+static inline void sdram_selfrefresh_enable(void)
+{
+	u32 lpr;
+
+	saved_lpr = at91_sys_read(AT91_SDRAMC_LPR);
+
+	lpr = saved_lpr & ~AT91_SDRAMC_LPCB;
+	at91_sys_write(AT91_SDRAMC_LPR, lpr | AT91_SDRAMC_LPCB_SELF_REFRESH);
+}
+
+#define sdram_selfrefresh_disable()	at91_sys_write(AT91_SDRAMC_LPR, saved_lpr)
+
+/*
+ * FIXME: The AT91SAM9263 has a second EBI controller which may have
+ *        additional SDRAM.  pm_slowclock.S will require a similar fix.
+ */
+
+#endif
+
+
+/*
+ * Show the reason for the previous system reset.
+ */
+#if defined(AT91_SHDWC)
+
+#include <asm/arch/at91_rstc.h>
+#include <asm/arch/at91_shdwc.h>
+
+static void __init show_reset_status(void)
+{
+	static char reset[] __initdata = "reset";
+
+	static char general[] __initdata = "general";
+	static char wakeup[] __initdata = "wakeup";
+	static char watchdog[] __initdata = "watchdog";
+	static char software[] __initdata = "software";
+	static char user[] __initdata = "user";
+	static char unknown[] __initdata = "unknown";
+
+	static char signal[] __initdata = "signal";
+	static char rtc[] __initdata = "rtc";
+	static char rtt[] __initdata = "rtt";
+	static char restore[] __initdata = "power-restored";
+
+	char *reason, *r2 = reset;
+	u32 reset_type, wake_type;
+
+	reset_type = at91_sys_read(AT91_RSTC_SR) & AT91_RSTC_RSTTYP;
+	wake_type = at91_sys_read(AT91_SHDW_SR);
+
+	switch (reset_type) {
+	case AT91_RSTC_RSTTYP_GENERAL:
+		reason = general;
+		break;
+	case AT91_RSTC_RSTTYP_WAKEUP:
+		/* board-specific code enabled the wakeup sources */
+		reason = wakeup;
+
+		/* "wakeup signal" */
+		if (wake_type & AT91_SHDW_WAKEUP0)
+			r2 = signal;
+		else {
+			r2 = reason;
+			if (wake_type & AT91_SHDW_RTTWK)	/* rtt wakeup */
+				reason = rtt;
+			else if (wake_type & AT91_SHDW_RTCWK)	/* rtc wakeup */
+				reason = rtc;
+			else if (wake_type == 0)	/* power-restored wakeup */
+				reason = restore;
+			else				/* unknown wakeup */
+				reason = unknown;
+		}
+		break;
+	case AT91_RSTC_RSTTYP_WATCHDOG:
+		reason = watchdog;
+		break;
+	case AT91_RSTC_RSTTYP_SOFTWARE:
+		reason = software;
+		break;
+	case AT91_RSTC_RSTTYP_USER:
+		reason = user;
+		break;
+	default:
+		reason = unknown;
+		break;
+	}
+	pr_info("AT91: Starting after %s %s\n", reason, r2);
+}
+#else
+static void __init show_reset_status(void) {}
+#endif
+
 
 static int at91_pm_valid_state(suspend_state_t state)
 {
@@ -125,6 +248,11 @@ EXPORT_SYMBOL(at91_suspend_entering_slow_clock);
 
 static void (*slow_clock)(void);
 
+#ifdef CONFIG_AT91_SLOW_CLOCK
+extern void at91_slow_clock(void);
+extern u32 at91_slow_clock_sz;
+#endif
+
 
 static int at91_pm_enter(suspend_state_t state)
 {
@@ -158,11 +286,14 @@ static int at91_pm_enter(suspend_state_t state)
 			 * turning off the main oscillator; reverse on wakeup.
 			 */
 			if (slow_clock) {
+#ifdef CONFIG_AT91_SLOW_CLOCK
+				/* copy slow_clock handler to SRAM, and call it */
+				memcpy(slow_clock, at91_slow_clock, at91_slow_clock_sz);
+#endif
 				slow_clock();
 				break;
 			} else {
-				/* DEVELOPMENT ONLY */
-				pr_info("AT91: PM - no slow clock mode yet ...\n");
+				pr_info("AT91: PM - no slow clock mode enabled ...\n");
 				/* FALLTHROUGH leaving master clock alone */
 			}
 
@@ -175,13 +306,15 @@ static int at91_pm_enter(suspend_state_t state)
 		case PM_SUSPEND_STANDBY:
 			/*
 			 * NOTE: the Wait-for-Interrupt instruction needs to be
-			 * in icache so the SDRAM stays in self-refresh mode until
-			 * the wakeup IRQ occurs.
+			 * in icache so no SDRAM accesses are needed until the
+			 * wakeup IRQ occurs and self-refresh is terminated.
 			 */
 			asm("b 1f; .align 5; 1:");
 			asm("mcr p15, 0, r0, c7, c10, 4");	/* drain write buffer */
-			at91_sys_write(AT91_SDRAMC_SRR, 1);	/* self-refresh mode */
-			/* fall though to next state */
+			sdram_selfrefresh_enable();
+			asm("mcr p15, 0, r0, c7, c0, 4");	/* wait for interrupt */
+			sdram_selfrefresh_disable();
+			break;
 
 		case PM_SUSPEND_ON:
 			asm("mcr p15, 0, r0, c7, c0, 4");	/* wait for interrupt */
@@ -196,6 +329,7 @@ static int at91_pm_enter(suspend_state_t state)
 			at91_sys_read(AT91_AIC_IPR) & at91_sys_read(AT91_AIC_IMR));
 
 error:
+	sdram_selfrefresh_disable();
 	target_state = PM_SUSPEND_ON;
 	at91_irq_resume();
 	at91_gpio_resume();
@@ -220,21 +354,20 @@ static struct platform_suspend_ops at91_pm_ops ={
 
 static int __init at91_pm_init(void)
 {
-	printk("AT91: Power Management\n");
-
-#ifdef CONFIG_AT91_PM_SLOW_CLOCK
-	/* REVISIT allocations of SRAM should be dynamically managed.
-	 * FIQ handlers and other components will want SRAM/TCM too...
-	 */
-	slow_clock = (void *) (AT91_VA_BASE_SRAM + (3 * SZ_4K));
-	memcpy(slow_clock, at91rm9200_slow_clock, at91rm9200_slow_clock_sz);
+#ifdef CONFIG_AT91_SLOW_CLOCK
+	slow_clock = (void *) (AT91_IO_VIRT_BASE - at91_slow_clock_sz);
 #endif
 
-	/* Disable SDRAM low-power mode.  Cannot be used with self-refresh. */
+	pr_info("AT91: Power Management%s\n", (slow_clock ? " (with slow clock mode)" : ""));
+
+#ifdef CONFIG_ARCH_AT91RM9200
+	/* AT91RM9200 SDRAM low-power mode cannot be used with self-refresh. */
 	at91_sys_write(AT91_SDRAMC_LPR, 0);
+#endif
 
 	suspend_set_ops(&at91_pm_ops);
 
+	show_reset_status();
 	return 0;
 }
 arch_initcall(at91_pm_init);