diff --git a/arch/arm/mach-omap2/board-3430sdp.c b/arch/arm/mach-omap2/board-3430sdp.c
index a10e96f48aea..f312b1513753 100644
--- a/arch/arm/mach-omap2/board-3430sdp.c
+++ b/arch/arm/mach-omap2/board-3430sdp.c
@@ -46,6 +46,7 @@
#include "mux.h"
#include "sdram-qimonda-hyb18m512160af-6.h"
#include "hsmmc.h"
+#include "pm.h"
#define CONFIG_DISABLE_HFCLK 1
@@ -57,6 +58,24 @@
#define TWL4030_MSECURE_GPIO 22
+/* FIXME: These values need to be updated based on more profiling on 3430sdp*/
+static struct cpuidle_params omap3_cpuidle_params_table[] = {
+ /* C1 */
+ {1, 2, 2, 5},
+ /* C2 */
+ {1, 10, 10, 30},
+ /* C3 */
+ {1, 50, 50, 300},
+ /* C4 */
+ {1, 1500, 1800, 4000},
+ /* C5 */
+ {1, 2500, 7500, 12000},
+ /* C6 */
+ {1, 3000, 8500, 15000},
+ /* C7 */
+ {1, 10000, 30000, 300000},
+};
+
static int board_keymap[] = {
KEY(0, 0, KEY_LEFT),
KEY(0, 1, KEY_RIGHT),
@@ -307,6 +326,7 @@ static void __init omap_3430sdp_init_irq(void)
{
omap_board_config = sdp3430_config;
omap_board_config_size = ARRAY_SIZE(sdp3430_config);
+ omap3_pm_init_cpuidle(omap3_cpuidle_params_table);
omap2_init_common_hw(hyb18m512160af6_sdrc_params, NULL);
omap_init_irq();
omap_gpio_init();
diff --git a/arch/arm/mach-omap2/board-rx51.c b/arch/arm/mach-omap2/board-rx51.c
index 0ccb8b46d157..b155c366c650 100644
--- a/arch/arm/mach-omap2/board-rx51.c
+++ b/arch/arm/mach-omap2/board-rx51.c
@@ -16,6 +16,7 @@
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/gpio.h>
+#include <linux/leds.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
@@ -30,9 +31,49 @@
#include <plat/usb.h>
#include "mux.h"
+#include "pm.h"
+
+#define RX51_GPIO_SLEEP_IND 162
struct omap_sdrc_params *rx51_get_sdram_timings(void);
+static struct gpio_led gpio_leds[] = {
+ {
+ .name = "sleep_ind",
+ .gpio = RX51_GPIO_SLEEP_IND,
+ },
+};
+
+static struct gpio_led_platform_data gpio_led_info = {
+ .leds = gpio_leds,
+ .num_leds = ARRAY_SIZE(gpio_leds),
+};
+
+static struct platform_device leds_gpio = {
+ .name = "leds-gpio",
+ .id = -1,
+ .dev = {
+ .platform_data = &gpio_led_info,
+ },
+};
+
+static struct cpuidle_params rx51_cpuidle_params[] = {
+ /* C1 */
+ {1, 110, 162, 5},
+ /* C2 */
+ {1, 106, 180, 309},
+ /* C3 */
+ {0, 107, 410, 46057},
+ /* C4 */
+ {0, 121, 3374, 46057},
+ /* C5 */
+ {1, 855, 1146, 46057},
+ /* C6 */
+ {0, 7580, 4134, 484329},
+ /* C7 */
+ {1, 7505, 15274, 484329},
+};
+
static struct omap_lcd_config rx51_lcd_config = {
.ctrl_name = "internal",
};
@@ -62,6 +103,7 @@ static void __init rx51_init_irq(void)
omap_board_config = rx51_config;
omap_board_config_size = ARRAY_SIZE(rx51_config);
+ omap3_pm_init_cpuidle(rx51_cpuidle_params);
sdrc_params = rx51_get_sdram_timings();
omap2_init_common_hw(sdrc_params, sdrc_params);
omap_init_irq();
@@ -94,6 +136,8 @@ static void __init rx51_init(void)
/* Ensure SDRC pins are mux'd for self-refresh */
omap_mux_init_signal("sdrc_cke0", OMAP_PIN_OUTPUT);
omap_mux_init_signal("sdrc_cke1", OMAP_PIN_OUTPUT);
+
+ platform_device_register(&leds_gpio);
}
static void __init rx51_map_io(void)
diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
index 12f0cbfc2894..3d3d035db9af 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -45,6 +45,8 @@
#define OMAP3_STATE_C6 5 /* C6 - MPU OFF + Core RET */
#define OMAP3_STATE_C7 6 /* C7 - MPU OFF + Core OFF */
+#define OMAP3_STATE_MAX OMAP3_STATE_C7
+
struct omap3_processor_cx {
u8 valid;
u8 type;
@@ -60,6 +62,30 @@ struct omap3_processor_cx omap3_power_states[OMAP3_MAX_STATES];
struct omap3_processor_cx current_cx_state;
struct powerdomain *mpu_pd, *core_pd;
+/*
+ * The latencies/thresholds for various C states have
+ * to be configured from the respective board files.
+ * These are some default values (which might not provide
+ * the best power savings) used on boards which do not
+ * pass these details from the board file.
+ */
+static struct cpuidle_params cpuidle_params_table[] = {
+ /* C1 */
+ {1, 2, 2, 5},
+ /* C2 */
+ {1, 10, 10, 30},
+ /* C3 */
+ {1, 50, 50, 300},
+ /* C4 */
+ {1, 1500, 1800, 4000},
+ /* C5 */
+ {1, 2500, 7500, 12000},
+ /* C6 */
+ {1, 3000, 8500, 15000},
+ /* C7 */
+ {1, 10000, 30000, 300000},
+};
+
static int omap3_idle_bm_check(void)
{
if (!omap3_can_sleep())
@@ -104,13 +130,6 @@ static int omap3_enter_idle(struct cpuidle_device *dev,
local_irq_disable();
local_fiq_disable();
- if (!enable_off_mode) {
- if (mpu_state < PWRDM_POWER_RET)
- mpu_state = PWRDM_POWER_RET;
- if (core_state < PWRDM_POWER_RET)
- core_state = PWRDM_POWER_RET;
- }
-
pwrdm_set_next_pwrst(mpu_pd, mpu_state);
pwrdm_set_next_pwrst(core_pd, core_state);
@@ -140,6 +159,67 @@ return_sleep_time:
return ts_idle.tv_nsec / NSEC_PER_USEC + ts_idle.tv_sec * USEC_PER_SEC;
}
+/**
+ * next_valid_state - Find next valid c-state
+ * @dev: cpuidle device
+ * @state: Currently selected c-state
+ *
+ * If the current state is valid, it is returned back to the caller.
+ * Else, this function searches for a lower c-state which is still
+ * valid (as defined in omap3_power_states[]).
+ */
+static struct cpuidle_state *next_valid_state(struct cpuidle_device *dev,
+ struct cpuidle_state *curr)
+{
+ struct cpuidle_state *next = NULL;
+ struct omap3_processor_cx *cx;
+
+ cx = (struct omap3_processor_cx *)cpuidle_get_statedata(curr);
+
+ /* Check if current state is valid */
+ if (cx->valid) {
+ return curr;
+ } else {
+ u8 idx = OMAP3_STATE_MAX;
+
+ /*
+ * Reach the current state starting at highest C-state
+ */
+ for (; idx >= OMAP3_STATE_C1; idx--) {
+ if (&dev->states[idx] == curr) {
+ next = &dev->states[idx];
+ break;
+ }
+ }
+
+ /*
+ * Should never hit this condition.
+ */
+ WARN_ON(next == NULL);
+
+ /*
+ * Drop to next valid state.
+ * Start search from the next (lower) state.
+ */
+ idx--;
+ for (; idx >= OMAP3_STATE_C1; idx--) {
+ struct omap3_processor_cx *cx;
+
+ cx = cpuidle_get_statedata(&dev->states[idx]);
+ if (cx->valid) {
+ next = &dev->states[idx];
+ break;
+ }
+ }
+ /*
+ * C1 and C2 are always valid.
+ * So, no need to check for 'next==NULL' outside this loop.
+ */
+ }
+
+ return next;
+}
+
/**
* omap3_enter_idle_bm - Checks for any bus activity
* @dev: cpuidle device
@@ -152,7 +232,7 @@ return_sleep_time:
static int omap3_enter_idle_bm(struct cpuidle_device *dev,
struct cpuidle_state *state)
{
- struct cpuidle_state *new_state = state;
+ struct cpuidle_state *new_state = next_valid_state(dev, state);
if ((state->flags & CPUIDLE_FLAG_CHECK_BM) && omap3_idle_bm_check()) {
BUG_ON(!dev->safe_state);
@@ -165,6 +245,50 @@ static int omap3_enter_idle_bm(struct cpuidle_device *dev,
DEFINE_PER_CPU(struct cpuidle_device, omap3_idle_dev);
+/**
+ * omap3_cpuidle_update_states - Update the cpuidle states.
+ *
+ * Currently, this function toggles the validity of idle states based upon
+ * the flag 'enable_off_mode'. When the flag is set all states are valid.
+ * Else, states leading to OFF state set to be invalid.
+ */
+void omap3_cpuidle_update_states(void)
+{
+ int i;
+
+ for (i = OMAP3_STATE_C1; i < OMAP3_MAX_STATES; i++) {
+ struct omap3_processor_cx *cx = &omap3_power_states[i];
+
+ if (enable_off_mode) {
+ cx->valid = 1;
+ } else {
+ if ((cx->mpu_state == PWRDM_POWER_OFF) ||
+ (cx->core_state == PWRDM_POWER_OFF))
+ cx->valid = 0;
+ }
+ }
+}
+
+void omap3_pm_init_cpuidle(struct cpuidle_params *cpuidle_board_params)
+{
+ int i;
+
+ if (!cpuidle_board_params)
+ return;
+
+ for (i = OMAP3_STATE_C1; i < OMAP3_MAX_STATES; i++) {
+ cpuidle_params_table[i].valid =
+ cpuidle_board_params[i].valid;
+ cpuidle_params_table[i].sleep_latency =
+ cpuidle_board_params[i].sleep_latency;
+ cpuidle_params_table[i].wake_latency =
+ cpuidle_board_params[i].wake_latency;
+ cpuidle_params_table[i].threshold =
+ cpuidle_board_params[i].threshold;
+ }
+ return;
+}
+
/* omap3_init_power_states - Initialises the OMAP3 specific C states.
*
* Below is the desciption of each C state.
@@ -179,75 +303,103 @@ DEFINE_PER_CPU(struct cpuidle_device, omap3_idle_dev);
void omap_init_power_states(void)
{
/* C1 . MPU WFI + Core active */
- omap3_power_states[OMAP3_STATE_C1].valid = 1;
+ omap3_power_states[OMAP3_STATE_C1].valid =
+ cpuidle_params_table[OMAP3_STATE_C1].valid;
omap3_power_states[OMAP3_STATE_C1].type = OMAP3_STATE_C1;
- omap3_power_states[OMAP3_STATE_C1].sleep_latency = 2;
- omap3_power_states[OMAP3_STATE_C1].wakeup_latency = 2;
- omap3_power_states[OMAP3_STATE_C1].threshold = 5;
+ omap3_power_states[OMAP3_STATE_C1].sleep_latency =
+ cpuidle_params_table[OMAP3_STATE_C1].sleep_latency;
+ omap3_power_states[OMAP3_STATE_C1].wakeup_latency =
+ cpuidle_params_table[OMAP3_STATE_C1].wake_latency;
+ omap3_power_states[OMAP3_STATE_C1].threshold =
+ cpuidle_params_table[OMAP3_STATE_C1].threshold;
omap3_power_states[OMAP3_STATE_C1].mpu_state = PWRDM_POWER_ON;
omap3_power_states[OMAP3_STATE_C1].core_state = PWRDM_POWER_ON;
omap3_power_states[OMAP3_STATE_C1].flags = CPUIDLE_FLAG_TIME_VALID;
/* C2 . MPU WFI + Core inactive */
- omap3_power_states[OMAP3_STATE_C2].valid = 1;
+ omap3_power_states[OMAP3_STATE_C2].valid =
+ cpuidle_params_table[OMAP3_STATE_C2].valid;
omap3_power_states[OMAP3_STATE_C2].type = OMAP3_STATE_C2;
- omap3_power_states[OMAP3_STATE_C2].sleep_latency = 10;
- omap3_power_states[OMAP3_STATE_C2].wakeup_latency = 10;
- omap3_power_states[OMAP3_STATE_C2].threshold = 30;
+ omap3_power_states[OMAP3_STATE_C2].sleep_latency =
+ cpuidle_params_table[OMAP3_STATE_C2].sleep_latency;
+ omap3_power_states[OMAP3_STATE_C2].wakeup_latency =
+ cpuidle_params_table[OMAP3_STATE_C2].wake_latency;
+ omap3_power_states[OMAP3_STATE_C2].threshold =
+ cpuidle_params_table[OMAP3_STATE_C2].threshold;
omap3_power_states[OMAP3_STATE_C2].mpu_state = PWRDM_POWER_ON;
omap3_power_states[OMAP3_STATE_C2].core_state = PWRDM_POWER_ON;
omap3_power_states[OMAP3_STATE_C2].flags = CPUIDLE_FLAG_TIME_VALID;
/* C3 . MPU CSWR + Core inactive */
- omap3_power_states[OMAP3_STATE_C3].valid = 1;
+ omap3_power_states[OMAP3_STATE_C3].valid =
+ cpuidle_params_table[OMAP3_STATE_C3].valid;
omap3_power_states[OMAP3_STATE_C3].type = OMAP3_STATE_C3;
- omap3_power_states[OMAP3_STATE_C3].sleep_latency = 50;
- omap3_power_states[OMAP3_STATE_C3].wakeup_latency = 50;
- omap3_power_states[OMAP3_STATE_C3].threshold = 300;
+ omap3_power_states[OMAP3_STATE_C3].sleep_latency =
+ cpuidle_params_table[OMAP3_STATE_C3].sleep_latency;
+ omap3_power_states[OMAP3_STATE_C3].wakeup_latency =
+ cpuidle_params_table[OMAP3_STATE_C3].wake_latency;
+ omap3_power_states[OMAP3_STATE_C3].threshold =
+ cpuidle_params_table[OMAP3_STATE_C3].threshold;
omap3_power_states[OMAP3_STATE_C3].mpu_state = PWRDM_POWER_RET;
omap3_power_states[OMAP3_STATE_C3].core_state = PWRDM_POWER_ON;
omap3_power_states[OMAP3_STATE_C3].flags = CPUIDLE_FLAG_TIME_VALID |
CPUIDLE_FLAG_CHECK_BM;
/* C4 . MPU OFF + Core inactive */
- omap3_power_states[OMAP3_STATE_C4].valid = 1;
+ omap3_power_states[OMAP3_STATE_C4].valid =
+ cpuidle_params_table[OMAP3_STATE_C4].valid;
omap3_power_states[OMAP3_STATE_C4].type = OMAP3_STATE_C4;
- omap3_power_states[OMAP3_STATE_C4].sleep_latency = 1500;
- omap3_power_states[OMAP3_STATE_C4].wakeup_latency = 1800;
- omap3_power_states[OMAP3_STATE_C4].threshold = 4000;
+ omap3_power_states[OMAP3_STATE_C4].sleep_latency =
+ cpuidle_params_table[OMAP3_STATE_C4].sleep_latency;
+ omap3_power_states[OMAP3_STATE_C4].wakeup_latency =
+ cpuidle_params_table[OMAP3_STATE_C4].wake_latency;
+ omap3_power_states[OMAP3_STATE_C4].threshold =
+ cpuidle_params_table[OMAP3_STATE_C4].threshold;
omap3_power_states[OMAP3_STATE_C4].mpu_state = PWRDM_POWER_OFF;
omap3_power_states[OMAP3_STATE_C4].core_state = PWRDM_POWER_ON;
omap3_power_states[OMAP3_STATE_C4].flags = CPUIDLE_FLAG_TIME_VALID |
CPUIDLE_FLAG_CHECK_BM;
/* C5 . MPU CSWR + Core CSWR*/
- omap3_power_states[OMAP3_STATE_C5].valid = 1;
+ omap3_power_states[OMAP3_STATE_C5].valid =
+ cpuidle_params_table[OMAP3_STATE_C5].valid;
omap3_power_states[OMAP3_STATE_C5].type = OMAP3_STATE_C5;
- omap3_power_states[OMAP3_STATE_C5].sleep_latency = 2500;
- omap3_power_states[OMAP3_STATE_C5].wakeup_latency = 7500;
- omap3_power_states[OMAP3_STATE_C5].threshold = 12000;
+ omap3_power_states[OMAP3_STATE_C5].sleep_latency =
+ cpuidle_params_table[OMAP3_STATE_C5].sleep_latency;
+ omap3_power_states[OMAP3_STATE_C5].wakeup_latency =
+ cpuidle_params_table[OMAP3_STATE_C5].wake_latency;
+ omap3_power_states[OMAP3_STATE_C5].threshold =
+ cpuidle_params_table[OMAP3_STATE_C5].threshold;
omap3_power_states[OMAP3_STATE_C5].mpu_state = PWRDM_POWER_RET;
omap3_power_states[OMAP3_STATE_C5].core_state = PWRDM_POWER_RET;
omap3_power_states[OMAP3_STATE_C5].flags = CPUIDLE_FLAG_TIME_VALID |
CPUIDLE_FLAG_CHECK_BM;
/* C6 . MPU OFF + Core CSWR */
- omap3_power_states[OMAP3_STATE_C6].valid = 1;
+ omap3_power_states[OMAP3_STATE_C6].valid =
+ cpuidle_params_table[OMAP3_STATE_C6].valid;
omap3_power_states[OMAP3_STATE_C6].type = OMAP3_STATE_C6;
- omap3_power_states[OMAP3_STATE_C6].sleep_latency = 3000;
- omap3_power_states[OMAP3_STATE_C6].wakeup_latency = 8500;
- omap3_power_states[OMAP3_STATE_C6].threshold = 15000;
+ omap3_power_states[OMAP3_STATE_C6].sleep_latency =
+ cpuidle_params_table[OMAP3_STATE_C6].sleep_latency;
+ omap3_power_states[OMAP3_STATE_C6].wakeup_latency =
+ cpuidle_params_table[OMAP3_STATE_C6].wake_latency;
+ omap3_power_states[OMAP3_STATE_C6].threshold =
+ cpuidle_params_table[OMAP3_STATE_C6].threshold;
omap3_power_states[OMAP3_STATE_C6].mpu_state = PWRDM_POWER_OFF;
omap3_power_states[OMAP3_STATE_C6].core_state = PWRDM_POWER_RET;
omap3_power_states[OMAP3_STATE_C6].flags = CPUIDLE_FLAG_TIME_VALID |
CPUIDLE_FLAG_CHECK_BM;
/* C7 . MPU OFF + Core OFF */
- omap3_power_states[OMAP3_STATE_C7].valid = 1;
+ omap3_power_states[OMAP3_STATE_C7].valid =
+ cpuidle_params_table[OMAP3_STATE_C7].valid;
omap3_power_states[OMAP3_STATE_C7].type = OMAP3_STATE_C7;
- omap3_power_states[OMAP3_STATE_C7].sleep_latency = 10000;
- omap3_power_states[OMAP3_STATE_C7].wakeup_latency = 30000;
- omap3_power_states[OMAP3_STATE_C7].threshold = 300000;
+ omap3_power_states[OMAP3_STATE_C7].sleep_latency =
+ cpuidle_params_table[OMAP3_STATE_C7].sleep_latency;
+ omap3_power_states[OMAP3_STATE_C7].wakeup_latency =
+ cpuidle_params_table[OMAP3_STATE_C7].wake_latency;
+ omap3_power_states[OMAP3_STATE_C7].threshold =
+ cpuidle_params_table[OMAP3_STATE_C7].threshold;
omap3_power_states[OMAP3_STATE_C7].mpu_state = PWRDM_POWER_OFF;
omap3_power_states[OMAP3_STATE_C7].core_state = PWRDM_POWER_OFF;
omap3_power_states[OMAP3_STATE_C7].flags = CPUIDLE_FLAG_TIME_VALID |
@@ -302,6 +454,8 @@ int __init omap3_idle_init(void)
return -EINVAL;
dev->state_count = count;
+ omap3_cpuidle_update_states();
+
if (cpuidle_register_device(dev)) {
printk(KERN_ERR "%s: CPUidle register device failed\n",
__func__);
diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h
index 7a9c2d004511..bd6466a2b039 100644
--- a/arch/arm/mach-omap2/pm.h
+++ b/arch/arm/mach-omap2/pm.h
@@ -23,6 +23,22 @@ extern int omap3_can_sleep(void);
extern int set_pwrdm_state(struct powerdomain *pwrdm, u32 state);
extern int omap3_idle_init(void);
+struct cpuidle_params {
+ u8 valid;
+ u32 sleep_latency;
+ u32 wake_latency;
+ u32 threshold;
+};
+
+#if defined(CONFIG_PM) && defined(CONFIG_CPU_IDLE)
+extern void omap3_pm_init_cpuidle(struct cpuidle_params *cpuidle_board_params);
+#else
+static
+inline void omap3_pm_init_cpuidle(struct cpuidle_params *cpuidle_board_params)
+{
+}
+#endif
+
extern int omap3_pm_get_suspend_state(struct powerdomain *pwrdm);
extern int omap3_pm_set_suspend_state(struct powerdomain *pwrdm, int state);
@@ -37,6 +53,10 @@ extern int omap2_pm_debug;
#define omap2_pm_debug 0
#endif
+#if defined(CONFIG_CPU_IDLE)
+extern void omap3_cpuidle_update_states(void);
+#endif
+
#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
extern void pm_dbg_update_time(struct powerdomain *pwrdm, int prev);
extern int pm_dbg_regset_save(int reg_set);
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 5087b153b093..5320229926e4 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -941,6 +941,10 @@ void omap3_pm_off_mode_enable(int enable)
else
state = PWRDM_POWER_RET;
+#ifdef CONFIG_CPU_IDLE
+ omap3_cpuidle_update_states();
+#endif
+
list_for_each_entry(pwrst, &pwrst_list, node) {
pwrst->next_state = state;
set_pwrdm_state(pwrst->pwrdm, state);
diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S
index 22fcc14e63be..d522cd70bf53 100644
--- a/arch/arm/mach-omap2/sleep34xx.S
+++ b/arch/arm/mach-omap2/sleep34xx.S
@@ -33,6 +33,8 @@
#include "prm.h"
#include "sdrc.h"
+#define SDRC_SCRATCHPAD_SEM_V 0xfa00291c
+
#define PM_PREPWSTST_CORE_V OMAP34XX_PRM_REGADDR(CORE_MOD, \
OMAP3430_PM_PREPWSTST)
#define PM_PREPWSTST_CORE_P 0x48306AE8
@@ -57,6 +59,37 @@
#define SDRC_DLLA_STATUS_V OMAP34XX_SDRC_REGADDR(SDRC_DLLA_STATUS)
#define SDRC_DLLA_CTRL_V OMAP34XX_SDRC_REGADDR(SDRC_DLLA_CTRL)
+ .text
+/* Function to aquire the semaphore in scratchpad */
+ENTRY(lock_scratchpad_sem)
+ stmfd sp!, {lr} @ save registers on stack
+wait_sem:
+ mov r0,#1
+ ldr r1, sdrc_scratchpad_sem
+wait_loop:
+ ldr r2, [r1] @ load the lock value
+ cmp r2, r0 @ is the lock free ?
+ beq wait_loop @ not free...
+ swp r2, r0, [r1] @ semaphore free so lock it and proceed
+ cmp r2, r0 @ did we succeed ?
+ beq wait_sem @ no - try again
+ ldmfd sp!, {pc} @ restore regs and return
+sdrc_scratchpad_sem:
+ .word SDRC_SCRATCHPAD_SEM_V
+ENTRY(lock_scratchpad_sem_sz)
+ .word . - lock_scratchpad_sem
+
+ .text
+/* Function to release the scratchpad semaphore */
+ENTRY(unlock_scratchpad_sem)
+ stmfd sp!, {lr} @ save registers on stack
+ ldr r3, sdrc_scratchpad_sem
+ mov r2,#0
+ str r2,[r3]
+ ldmfd sp!, {pc} @ restore regs and return
+ENTRY(unlock_scratchpad_sem_sz)
+ .word . - unlock_scratchpad_sem
+
.text
/* Function call to get the restore pointer for resume from OFF */
ENTRY(get_restore_pointer)
@@ -251,6 +284,21 @@ restore:
mcr p15, 0, r0, c7, c10, 5 @ data memory barrier
.word 0xE1600071 @ call SMI monitor (smi #1)
+#ifdef CONFIG_OMAP3_L2_AUX_SECURE_SAVE_RESTORE
+ /* Restore L2 aux control register */
+ @ set service ID for PPA
+ mov r0, #CONFIG_OMAP3_L2_AUX_SECURE_SERVICE_SET_ID
+ mov r12, r0 @ copy service ID in r12
+ mov r1, #0 @ set task ID for ROM code in r1
+ mov r2, #4 @ set some flags in r2, r6
+ mov r6, #0xff
+ ldr r4, scratchpad_base
+ ldr r3, [r4, #0xBC]
+ adds r3, r3, #8 @ r3 points to parameters
+ mcr p15, 0, r0, c7, c10, 4 @ data write barrier
+ mcr p15, 0, r0, c7, c10, 5 @ data memory barrier
+ .word 0xE1600071 @ call SMI monitor (smi #1)
+#endif
b logic_l1_restore
l2_inv_api_params:
.word 0x1, 0x00
@@ -264,6 +312,11 @@ smi: .word 0xE1600070 @ Call SMI monitor (smieq)
ldr r0, [r3,#4]
mov r12, #0x3
.word 0xE1600070 @ Call SMI monitor (smieq)
+ ldr r4, scratchpad_base
+ ldr r3, [r4,#0xBC]
+ ldr r0, [r3,#12]
+ mov r12, #0x2
+ .word 0xE1600070 @ Call SMI monitor (smieq)
logic_l1_restore:
mov r1, #0
/* Invalidate all instruction caches to PoU
@@ -272,7 +325,7 @@ logic_l1_restore:
ldr r4, scratchpad_base
ldr r3, [r4,#0xBC]
- adds r3, r3, #8
+ adds r3, r3, #16
ldmia r3!, {r4-r6}
mov sp, r4
msr spsr_cxsf, r5
@@ -391,7 +444,9 @@ save_context_wfi:
mov r8, r0 /* Store SDRAM address in r8 */
mrc p15, 0, r5, c1, c0, 1 @ Read Auxiliary Control Register
mov r4, #0x1 @ Number of parameters for restore call
- stmia r8!, {r4-r5}
+ stmia r8!, {r4-r5} @ Push parameters for restore call
+ mrc p15, 1, r5, c9, c0, 2 @ Read L2 AUX ctrl register
+ stmia r8!, {r4-r5} @ Push parameters for restore call
/* Check what that target sleep state is:stored in r1*/
/* 1 - Only L1 and logic lost */
/* 2 - Only L2 lost */
diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig
index 97d0c79ffd2b..be9484a28b12 100644
--- a/arch/arm/plat-omap/Kconfig
+++ b/arch/arm/plat-omap/Kconfig
@@ -135,6 +135,23 @@ config OMAP_32K_TIMER
endchoice
+config OMAP3_L2_AUX_SECURE_SAVE_RESTORE
+ bool "OMAP3 HS/EMU save and restore for L2 AUX control register"
+ depends on ARCH_OMAP3 && PM
+ default n
+ help
+ Without this option, L2 Auxiliary control register contents are
+ lost during off-mode entry on HS/EMU devices. This feature
+ requires support from PPA / boot-loader in HS/EMU devices, which
+ currently does not exist by default.
+
+config OMAP3_L2_AUX_SECURE_SERVICE_SET_ID
+ int "Service ID for the support routine to set L2 AUX control"
+ depends on OMAP3_L2_AUX_SECURE_SAVE_RESTORE
+ default 43
+ help
+ PPA routine service ID for setting L2 auxiliary control register.
+
config OMAP_32K_TIMER_HZ
int "Kernel internal timer frequency for 32KHz timer"
range 32 1024