Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 227 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/pm.c b/arch/arm/mach-pxa/pm.c
new file mode 100644
index 00000000000..82a4bf34c25
--- /dev/null
+++ b/arch/arm/mach-pxa/pm.c
@@ -0,0 +1,227 @@
+/*
+ * PXA250/210 Power Management Routines
+ *
+ * Original code for the SA11x0:
+ * Copyright (c) 2001 Cliff Brake <cbrake@accelent.com>
+ *
+ * Modified for the PXA250 by Nicolas Pitre:
+ * Copyright (c) 2002 Monta Vista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/suspend.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+
+#include <asm/hardware.h>
+#include <asm/memory.h>
+#include <asm/system.h>
+#include <asm/arch/pxa-regs.h>
+#include <asm/arch/lubbock.h>
+#include <asm/mach/time.h>
+
+
+/*
+ * Debug macros
+ */
+#undef DEBUG
+
+extern void pxa_cpu_suspend(void);
+extern void pxa_cpu_resume(void);
+
+#define SAVE(x)		sleep_save[SLEEP_SAVE_##x] = x
+#define RESTORE(x)	x = sleep_save[SLEEP_SAVE_##x]
+
+#define RESTORE_GPLEVEL(n) do { \
+	GPSR##n = sleep_save[SLEEP_SAVE_GPLR##n]; \
+	GPCR##n = ~sleep_save[SLEEP_SAVE_GPLR##n]; \
+} while (0)
+
+/*
+ * List of global PXA peripheral registers to preserve.
+ * More ones like CP and general purpose register values are preserved
+ * with the stack pointer in sleep.S.
+ */
+enum {	SLEEP_SAVE_START = 0,
+
+	SLEEP_SAVE_GPLR0, SLEEP_SAVE_GPLR1, SLEEP_SAVE_GPLR2, SLEEP_SAVE_GPLR3,
+	SLEEP_SAVE_GPDR0, SLEEP_SAVE_GPDR1, SLEEP_SAVE_GPDR2, SLEEP_SAVE_GPDR3,
+	SLEEP_SAVE_GRER0, SLEEP_SAVE_GRER1, SLEEP_SAVE_GRER2, SLEEP_SAVE_GRER3,
+	SLEEP_SAVE_GFER0, SLEEP_SAVE_GFER1, SLEEP_SAVE_GFER2, SLEEP_SAVE_GFER3,
+	SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2, SLEEP_SAVE_PGSR3,
+
+	SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,
+	SLEEP_SAVE_GAFR1_L, SLEEP_SAVE_GAFR1_U,
+	SLEEP_SAVE_GAFR2_L, SLEEP_SAVE_GAFR2_U,
+	SLEEP_SAVE_GAFR3_L, SLEEP_SAVE_GAFR3_U,
+
+	SLEEP_SAVE_PSTR,
+
+	SLEEP_SAVE_ICMR,
+	SLEEP_SAVE_CKEN,
+
+	SLEEP_SAVE_CKSUM,
+
+	SLEEP_SAVE_SIZE
+};
+
+
+static int pxa_pm_enter(suspend_state_t state)
+{
+	unsigned long sleep_save[SLEEP_SAVE_SIZE];
+	unsigned long checksum = 0;
+	struct timespec delta, rtc;
+	int i;
+
+	if (state != PM_SUSPEND_MEM)
+		return -EINVAL;
+
+#ifdef CONFIG_IWMMXT
+	/* force any iWMMXt context to ram **/
+	iwmmxt_task_disable(NULL);
+#endif
+
+	/* preserve current time */
+	rtc.tv_sec = RCNR;
+	rtc.tv_nsec = 0;
+	save_time_delta(&delta, &rtc);
+
+	SAVE(GPLR0); SAVE(GPLR1); SAVE(GPLR2);
+	SAVE(GPDR0); SAVE(GPDR1); SAVE(GPDR2);
+	SAVE(GRER0); SAVE(GRER1); SAVE(GRER2);
+	SAVE(GFER0); SAVE(GFER1); SAVE(GFER2);
+	SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2);
+
+	SAVE(GAFR0_L); SAVE(GAFR0_U);
+	SAVE(GAFR1_L); SAVE(GAFR1_U);
+	SAVE(GAFR2_L); SAVE(GAFR2_U);
+
+#ifdef CONFIG_PXA27x
+	SAVE(GPLR3); SAVE(GPDR3); SAVE(GRER3); SAVE(GFER3); SAVE(PGSR3);
+	SAVE(GAFR3_L); SAVE(GAFR3_U);
+#endif
+
+	SAVE(ICMR);
+	ICMR = 0;
+
+	SAVE(CKEN);
+	CKEN = 0;
+
+	SAVE(PSTR);
+
+	/* Note: wake up source are set up in each machine specific files */
+
+	/* clear GPIO transition detect  bits */
+	GEDR0 = GEDR0; GEDR1 = GEDR1; GEDR2 = GEDR2;
+#ifdef CONFIG_PXA27x
+	GEDR3 = GEDR3;
+#endif
+
+	/* Clear sleep reset status */
+	RCSR = RCSR_SMR;
+
+	/* set resume return address */
+	PSPR = virt_to_phys(pxa_cpu_resume);
+
+	/* before sleeping, calculate and save a checksum */
+	for (i = 0; i < SLEEP_SAVE_SIZE - 1; i++)
+		checksum += sleep_save[i];
+	sleep_save[SLEEP_SAVE_CKSUM] = checksum;
+
+	/* *** go zzz *** */
+	pxa_cpu_suspend();
+
+	/* after sleeping, validate the checksum */
+	checksum = 0;
+	for (i = 0; i < SLEEP_SAVE_SIZE - 1; i++)
+		checksum += sleep_save[i];
+
+	/* if invalid, display message and wait for a hardware reset */
+	if (checksum != sleep_save[SLEEP_SAVE_CKSUM]) {
+#ifdef CONFIG_ARCH_LUBBOCK
+		LUB_HEXLED = 0xbadbadc5;
+#endif
+		while (1)
+			pxa_cpu_suspend();
+	}
+
+	/* ensure not to come back here if it wasn't intended */
+	PSPR = 0;
+
+	/* restore registers */
+	RESTORE(GAFR0_L); RESTORE(GAFR0_U);
+	RESTORE(GAFR1_L); RESTORE(GAFR1_U);
+	RESTORE(GAFR2_L); RESTORE(GAFR2_U);
+	RESTORE_GPLEVEL(0); RESTORE_GPLEVEL(1); RESTORE_GPLEVEL(2);
+	RESTORE(GPDR0); RESTORE(GPDR1); RESTORE(GPDR2);
+	RESTORE(GRER0); RESTORE(GRER1); RESTORE(GRER2);
+	RESTORE(GFER0); RESTORE(GFER1); RESTORE(GFER2);
+	RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2);
+
+#ifdef CONFIG_PXA27x
+	RESTORE(GAFR3_L); RESTORE(GAFR3_U); RESTORE_GPLEVEL(3);
+	RESTORE(GPDR3); RESTORE(GRER3); RESTORE(GFER3); RESTORE(PGSR3);
+#endif
+
+	PSSR = PSSR_RDH | PSSR_PH;
+
+	RESTORE(CKEN);
+
+	ICLR = 0;
+	ICCR = 1;
+	RESTORE(ICMR);
+
+	RESTORE(PSTR);
+
+	/* restore current time */
+	rtc.tv_sec = RCNR;
+	restore_time_delta(&delta, &rtc);
+
+#ifdef DEBUG
+	printk(KERN_DEBUG "*** made it back from resume\n");
+#endif
+
+	return 0;
+}
+
+unsigned long sleep_phys_sp(void *sp)
+{
+	return virt_to_phys(sp);
+}
+
+/*
+ * Called after processes are frozen, but before we shut down devices.
+ */
+static int pxa_pm_prepare(suspend_state_t state)
+{
+	return 0;
+}
+
+/*
+ * Called after devices are re-setup, but before processes are thawed.
+ */
+static int pxa_pm_finish(suspend_state_t state)
+{
+	return 0;
+}
+
+/*
+ * Set to PM_DISK_FIRMWARE so we can quickly veto suspend-to-disk.
+ */
+static struct pm_ops pxa_pm_ops = {
+	.pm_disk_mode	= PM_DISK_FIRMWARE,
+	.prepare	= pxa_pm_prepare,
+	.enter		= pxa_pm_enter,
+	.finish		= pxa_pm_finish,
+};
+
+static int __init pxa_pm_init(void)
+{
+	pm_set_ops(&pxa_pm_ops);
+	return 0;
+}
+
+late_initcall(pxa_pm_init);