[ARM] 4488/1: pxa: move pxa25x/pxa27x specific code out of pm.c
1. introduce a structure pxa_cpu_pm_fns for pxa25x/pxa27x specific
operations as follows:
struct pxa_cpu_pm_fns {
int save_size;
void (*save)(unsigned long *);
void (*restore)(unsigned long *);
int (*valid)(suspend_state_t state);
void (*enter)(suspend_state_t state);
}
2. processor specific registers saving and restoring are performed
by calling the corresponding (*save) and (*restore)
3. pxa_cpu_pm_fns->save_size should be initialized to the required
size for processor specific registers saving, the allocated
memory address will be passed to (*save) and (*restore)
memory allocation happens early in pxa_pm_init(), and save_size
should be assigned prior to this (which is usually true, since
pxa_pm_init() happens in device_initcall()
4. there're some redundancies for those SLEEP_SAVE_XXX and related
macros, will be fixed later, one way possible is for the system
devices to handle the specific registers saving and restoring
Signed-off-by: eric miao <eric.y.miao@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-pxa/pm.c b/arch/arm/mach-pxa/pm.c
index e66dbc2..b59a81a 100644
--- a/arch/arm/mach-pxa/pm.c
+++ b/arch/arm/mach-pxa/pm.c
@@ -24,61 +24,13 @@
#include <asm/arch/lubbock.h>
#include <asm/mach/time.h>
-
-/*
- * 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
-};
-
+struct pxa_cpu_pm_fns *pxa_cpu_pm_fns;
+static unsigned long *sleep_save;
int pxa_pm_enter(suspend_state_t state)
{
- unsigned long sleep_save[SLEEP_SAVE_SIZE];
- unsigned long checksum = 0;
+ 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 **/
@@ -86,100 +38,35 @@
iwmmxt_task_disable(NULL);
#endif
- 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;
+ pxa_cpu_pm_fns->restore(sleep_save);
- /* restore registers */
- RESTORE_GPLEVEL(0); RESTORE_GPLEVEL(1); RESTORE_GPLEVEL(2);
- RESTORE(GPDR0); RESTORE(GPDR1); RESTORE(GPDR2);
- RESTORE(GAFR0_L); RESTORE(GAFR0_U);
- RESTORE(GAFR1_L); RESTORE(GAFR1_U);
- RESTORE(GAFR2_L); RESTORE(GAFR2_U);
- RESTORE(GRER0); RESTORE(GRER1); RESTORE(GRER2);
- RESTORE(GFER0); RESTORE(GFER1); RESTORE(GFER2);
- RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2);
-
-#ifdef CONFIG_PXA27x
- RESTORE(MDREFR);
- RESTORE_GPLEVEL(3); RESTORE(GPDR3);
- RESTORE(GAFR3_L); RESTORE(GAFR3_U);
- 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);
-
- RESTORE(PSTR);
-
-#ifdef DEBUG
- printk(KERN_DEBUG "*** made it back from resume\n");
-#endif
+ pr_debug("*** made it back from resume\n");
return 0;
}
@@ -190,3 +77,35 @@
{
return virt_to_phys(sp);
}
+
+static int pxa_pm_valid(suspend_state_t state)
+{
+ if (pxa_cpu_pm_fns)
+ return pxa_cpu_pm_fns->valid(state);
+
+ return -EINVAL;
+}
+
+static struct pm_ops pxa_pm_ops = {
+ .valid = pxa_pm_valid,
+ .enter = pxa_pm_enter,
+};
+
+static int __init pxa_pm_init(void)
+{
+ 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;
+ }
+
+ pm_set_ops(&pxa_pm_ops);
+ return 0;
+}
+
+device_initcall(pxa_pm_init);