* 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/module.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/pm.h>
#include <asm/arch/pxa-regs.h>
#include <asm/arch/lubbock.h>
#include <asm/mach/time.h>
+struct pxa_cpu_pm_fns *pxa_cpu_pm_fns;
+static unsigned long *sleep_save;
-/*
- * Debug macros
- */
-#undef DEBUG
-
-#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,
-
-#ifdef CONFIG_PXA27x
- SLEEP_SAVE_MDREFR,
- SLEEP_SAVE_PWER, SLEEP_SAVE_PCFR, SLEEP_SAVE_PRER,
- SLEEP_SAVE_PFER, SLEEP_SAVE_PKWR,
-#endif
-
- SLEEP_SAVE_CKSUM,
-
- SLEEP_SAVE_SIZE
-};
-
-
-static int pxa_pm_enter(suspend_state_t state)
+int pxa_pm_enter(suspend_state_t state)
{
- unsigned long sleep_save[SLEEP_SAVE_SIZE];
- unsigned long checksum = 0;
- struct timespec delta, rtc;
+ unsigned long sleep_save_checksum = 0, checksum = 0;
int i;
- extern void pxa_cpu_pm_enter(suspend_state_t state);
#ifdef CONFIG_IWMMXT
/* force any iWMMXt context to ram **/
- iwmmxt_task_disable(NULL);
+ if (elf_hwcap & HWCAP_IWMMXT)
+ 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(MDREFR);
- SAVE(GPLR3); SAVE(GPDR3); SAVE(GRER3); SAVE(GFER3); SAVE(PGSR3);
- SAVE(GAFR3_L); SAVE(GAFR3_U);
- SAVE(PWER); SAVE(PCFR); SAVE(PRER);
- SAVE(PFER); SAVE(PKWR);
-#endif
-
- SAVE(ICMR);
- ICMR = 0;
-
- SAVE(CKEN);
- 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
+ pxa_cpu_pm_fns->save(sleep_save);
/* Clear sleep reset status */
RCSR = RCSR_SMR;
/* 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;
+ for (i = 0; i < pxa_cpu_pm_fns->save_size - 1; i++)
+ sleep_save_checksum += sleep_save[i];
/* *** go zzz *** */
- pxa_cpu_pm_enter(state);
-
+ pxa_cpu_pm_fns->enter(state);
cpu_init();
/* after sleeping, validate the checksum */
- checksum = 0;
- for (i = 0; i < SLEEP_SAVE_SIZE - 1; i++)
+ for (i = 0; i < pxa_cpu_pm_fns->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]) {
+ if (checksum != sleep_save_checksum) {
#ifdef CONFIG_ARCH_LUBBOCK
LUB_HEXLED = 0xbadbadc5;
#endif
while (1)
- pxa_cpu_pm_enter(state);
+ pxa_cpu_pm_fns->enter(state);
}
- /* 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(MDREFR);
- RESTORE(GAFR3_L); RESTORE(GAFR3_U); RESTORE_GPLEVEL(3);
- RESTORE(GPDR3); RESTORE(GRER3); RESTORE(GFER3); RESTORE(PGSR3);
- RESTORE(PWER); RESTORE(PCFR); RESTORE(PRER);
- RESTORE(PFER); RESTORE(PKWR);
-#endif
-
- PSSR = PSSR_RDH | PSSR_PH;
-
- RESTORE(CKEN);
-
- ICLR = 0;
- ICCR = 1;
- RESTORE(ICMR);
+ pxa_cpu_pm_fns->restore(sleep_save);
- 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
+ pr_debug("*** made it back from resume\n");
return 0;
}
+EXPORT_SYMBOL_GPL(pxa_pm_enter);
+
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)
+static int pxa_pm_valid(suspend_state_t state)
{
- extern int pxa_cpu_pm_prepare(suspend_state_t state);
+ if (pxa_cpu_pm_fns)
+ return pxa_cpu_pm_fns->valid(state);
- return pxa_cpu_pm_prepare(state);
+ return -EINVAL;
}
-/*
- * 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,
+static struct platform_suspend_ops pxa_pm_ops = {
+ .valid = pxa_pm_valid,
.enter = pxa_pm_enter,
- .finish = pxa_pm_finish,
};
static int __init pxa_pm_init(void)
{
- pm_set_ops(&pxa_pm_ops);
+ if (!pxa_cpu_pm_fns) {
+ printk(KERN_ERR "no valid pxa_cpu_pm_fns defined\n");
+ return -EINVAL;
+ }
+
+ sleep_save = kmalloc(pxa_cpu_pm_fns->save_size, GFP_KERNEL);
+ if (!sleep_save) {
+ printk(KERN_ERR "failed to alloc memory for pm save\n");
+ return -ENOMEM;
+ }
+
+ suspend_set_ops(&pxa_pm_ops);
return 0;
}
-late_initcall(pxa_pm_init);
+device_initcall(pxa_pm_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff