1 files changed, 101 insertions, 204 deletions

diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
index d7bc31a..f9c8676 100644
--- a/arch/arm/mach-omap2/cpuidle34xx.c
+++ b/arch/arm/mach-omap2/cpuidle34xx.c
@@ -36,35 +36,6 @@
 
 #ifdef CONFIG_CPU_IDLE
 
-#define OMAP3_MAX_STATES 7
-#define OMAP3_STATE_C1 0 /* C1 - MPU WFI + Core active */
-#define OMAP3_STATE_C2 1 /* C2 - MPU WFI + Core inactive */
-#define OMAP3_STATE_C3 2 /* C3 - MPU CSWR + Core inactive */
-#define OMAP3_STATE_C4 3 /* C4 - MPU OFF + Core iactive */
-#define OMAP3_STATE_C5 4 /* C5 - MPU RET + Core RET */
-#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
-
-#define CPUIDLE_FLAG_CHECK_BM	0x10000	/* use omap3_enter_idle_bm() */
-
-struct omap3_processor_cx {
-	u8 valid;
-	u8 type;
-	u32 exit_latency;
-	u32 mpu_state;
-	u32 core_state;
-	u32 target_residency;
-	u32 flags;
-	const char *desc;
-};
-
-struct omap3_processor_cx omap3_power_states[OMAP3_MAX_STATES];
-struct omap3_processor_cx current_cx_state;
-struct powerdomain *mpu_pd, *core_pd, *per_pd;
-struct powerdomain *cam_pd;
-
 /*
  * The latencies/thresholds for various C states have
  * to be configured from the respective board files.
@@ -88,6 +59,17 @@ static struct cpuidle_params cpuidle_params_table[] = {
 	/* C7 */
 	{10000 + 30000, 300000, 1},
 };
+#define OMAP3_NUM_STATES ARRAY_SIZE(cpuidle_params_table)
+
+/* Mach specific information to be recorded in the C-state driver_data */
+struct omap3_idle_statedata {
+	u32 mpu_state;
+	u32 core_state;
+	u8 valid;
+};
+struct omap3_idle_statedata omap3_idle_data[OMAP3_NUM_STATES];
+
+struct powerdomain *mpu_pd, *core_pd, *per_pd, *cam_pd;
 
 static int omap3_idle_bm_check(void)
 {
@@ -121,12 +103,10 @@ static int _cpuidle_deny_idle(struct powerdomain *pwrdm,
 static int omap3_enter_idle(struct cpuidle_device *dev,
 			struct cpuidle_state *state)
 {
-	struct omap3_processor_cx *cx = cpuidle_get_statedata(state);
+	struct omap3_idle_statedata *cx = cpuidle_get_statedata(state);
 	struct timespec ts_preidle, ts_postidle, ts_idle;
 	u32 mpu_state = cx->mpu_state, core_state = cx->core_state;
 
-	current_cx_state = *cx;
-
 	/* Used to keep track of the total time in idle */
 	getnstimeofday(&ts_preidle);
 
@@ -139,7 +119,8 @@ static int omap3_enter_idle(struct cpuidle_device *dev,
 	if (omap_irq_pending() || need_resched())
 		goto return_sleep_time;
 
-	if (cx->type == OMAP3_STATE_C1) {
+	/* Deny idle for C1 */
+	if (state == &dev->states[0]) {
 		pwrdm_for_each_clkdm(mpu_pd, _cpuidle_deny_idle);
 		pwrdm_for_each_clkdm(core_pd, _cpuidle_deny_idle);
 	}
@@ -147,7 +128,8 @@ static int omap3_enter_idle(struct cpuidle_device *dev,
 	/* Execute ARM wfi */
 	omap_sram_idle();
 
-	if (cx->type == OMAP3_STATE_C1) {
+	/* Re-allow idle for C1 */
+	if (state == &dev->states[0]) {
 		pwrdm_for_each_clkdm(mpu_pd, _cpuidle_allow_idle);
 		pwrdm_for_each_clkdm(core_pd, _cpuidle_allow_idle);
 	}
@@ -169,26 +151,26 @@ return_sleep_time:
  *
  * 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[]).
+ * valid.
  */
 static struct cpuidle_state *next_valid_state(struct cpuidle_device *dev,
-						struct cpuidle_state *curr)
+					      struct cpuidle_state *curr)
 {
 	struct cpuidle_state *next = NULL;
-	struct omap3_processor_cx *cx;
+	struct omap3_idle_statedata *cx;
 
-	cx = (struct omap3_processor_cx *)cpuidle_get_statedata(curr);
+	cx = cpuidle_get_statedata(curr);
 
 	/* Check if current state is valid */
 	if (cx->valid) {
 		return curr;
 	} else {
-		u8 idx = OMAP3_STATE_MAX;
+		int idx = OMAP3_NUM_STATES - 1;
 
 		/*
 		 * Reach the current state starting at highest C-state
 		 */
-		for (; idx >= OMAP3_STATE_C1; idx--) {
+		for (; idx >= 0; idx--) {
 			if (&dev->states[idx] == curr) {
 				next = &dev->states[idx];
 				break;
@@ -205,9 +187,7 @@ static struct cpuidle_state *next_valid_state(struct cpuidle_device *dev,
 		 * Start search from the next (lower) state.
 		 */
 		idx--;
-		for (; idx >= OMAP3_STATE_C1; idx--) {
-			struct omap3_processor_cx *cx;
-
+		for (; idx >= 0; idx--) {
 			cx = cpuidle_get_statedata(&dev->states[idx]);
 			if (cx->valid) {
 				next = &dev->states[idx];
@@ -215,7 +195,7 @@ static struct cpuidle_state *next_valid_state(struct cpuidle_device *dev,
 			}
 		}
 		/*
-		 * C1 and C2 are always valid.
+		 * C1 is always valid.
 		 * So, no need to check for 'next==NULL' outside this loop.
 		 */
 	}
@@ -228,9 +208,8 @@ static struct cpuidle_state *next_valid_state(struct cpuidle_device *dev,
  * @dev: cpuidle device
  * @state: The target state to be programmed
  *
- * Used for C states with CPUIDLE_FLAG_CHECK_BM flag set. This
- * function checks for any pending activity and then programs the
- * device to the specified or a safer state.
+ * This function checks for any pending activity and then programs
+ * the device to the specified or a safer state.
  */
 static int omap3_enter_idle_bm(struct cpuidle_device *dev,
 			       struct cpuidle_state *state)
@@ -238,10 +217,10 @@ static int omap3_enter_idle_bm(struct cpuidle_device *dev,
 	struct cpuidle_state *new_state = next_valid_state(dev, state);
 	u32 core_next_state, per_next_state = 0, per_saved_state = 0;
 	u32 cam_state;
-	struct omap3_processor_cx *cx;
+	struct omap3_idle_statedata *cx;
 	int ret;
 
-	if ((state->flags & CPUIDLE_FLAG_CHECK_BM) && omap3_idle_bm_check()) {
+	if (omap3_idle_bm_check()) {
 		BUG_ON(!dev->safe_state);
 		new_state = dev->safe_state;
 		goto select_state;
@@ -307,8 +286,8 @@ void omap3_cpuidle_update_states(u32 mpu_deepest_state, u32 core_deepest_state)
 {
 	int i;
 
-	for (i = OMAP3_STATE_C1; i < OMAP3_MAX_STATES; i++) {
-		struct omap3_processor_cx *cx = &omap3_power_states[i];
+	for (i = 0; i < OMAP3_NUM_STATES; i++) {
+		struct omap3_idle_statedata *cx = &omap3_idle_data[i];
 
 		if ((cx->mpu_state >= mpu_deepest_state) &&
 		    (cx->core_state >= core_deepest_state)) {
@@ -326,9 +305,8 @@ void omap3_pm_init_cpuidle(struct cpuidle_params *cpuidle_board_params)
 	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;
+	for (i = 0; i < OMAP3_NUM_STATES; i++) {
+		cpuidle_params_table[i].valid =	cpuidle_board_params[i].valid;
 		cpuidle_params_table[i].exit_latency =
 			cpuidle_board_params[i].exit_latency;
 		cpuidle_params_table[i].target_residency =
@@ -337,185 +315,104 @@ void omap3_pm_init_cpuidle(struct cpuidle_params *cpuidle_board_params)
 	return;
 }
 
-/* omap3_init_power_states - Initialises the OMAP3 specific C states.
- *
- * Below is the desciption of each C state.
- * 	C1 . MPU WFI + Core active
- *	C2 . MPU WFI + Core inactive
- *	C3 . MPU CSWR + Core inactive
- *	C4 . MPU OFF + Core inactive
- *	C5 . MPU CSWR + Core CSWR
- *	C6 . MPU OFF + Core CSWR
- *	C7 . MPU OFF + Core OFF
- */
-void omap_init_power_states(void)
-{
-	/* C1 . MPU WFI + Core active */
-	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].exit_latency =
-			cpuidle_params_table[OMAP3_STATE_C1].exit_latency;
-	omap3_power_states[OMAP3_STATE_C1].target_residency =
-			cpuidle_params_table[OMAP3_STATE_C1].target_residency;
-	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;
-	omap3_power_states[OMAP3_STATE_C1].desc = "MPU ON + CORE ON";
-
-	/* C2 . MPU WFI + Core inactive */
-	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].exit_latency =
-			cpuidle_params_table[OMAP3_STATE_C2].exit_latency;
-	omap3_power_states[OMAP3_STATE_C2].target_residency =
-			cpuidle_params_table[OMAP3_STATE_C2].target_residency;
-	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 |
-				CPUIDLE_FLAG_CHECK_BM;
-	omap3_power_states[OMAP3_STATE_C2].desc = "MPU ON + CORE ON";
-
-	/* C3 . MPU CSWR + Core inactive */
-	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].exit_latency =
-			cpuidle_params_table[OMAP3_STATE_C3].exit_latency;
-	omap3_power_states[OMAP3_STATE_C3].target_residency =
-			cpuidle_params_table[OMAP3_STATE_C3].target_residency;
-	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;
-	omap3_power_states[OMAP3_STATE_C3].desc = "MPU RET + CORE ON";
-
-	/* C4 . MPU OFF + Core inactive */
-	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].exit_latency =
-			cpuidle_params_table[OMAP3_STATE_C4].exit_latency;
-	omap3_power_states[OMAP3_STATE_C4].target_residency =
-			cpuidle_params_table[OMAP3_STATE_C4].target_residency;
-	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;
-	omap3_power_states[OMAP3_STATE_C4].desc = "MPU OFF + CORE ON";
-
-	/* C5 . MPU CSWR + Core CSWR*/
-	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].exit_latency =
-			cpuidle_params_table[OMAP3_STATE_C5].exit_latency;
-	omap3_power_states[OMAP3_STATE_C5].target_residency =
-			cpuidle_params_table[OMAP3_STATE_C5].target_residency;
-	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;
-	omap3_power_states[OMAP3_STATE_C5].desc = "MPU RET + CORE RET";
-
-	/* C6 . MPU OFF + Core CSWR */
-	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].exit_latency =
-			cpuidle_params_table[OMAP3_STATE_C6].exit_latency;
-	omap3_power_states[OMAP3_STATE_C6].target_residency =
-			cpuidle_params_table[OMAP3_STATE_C6].target_residency;
-	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;
-	omap3_power_states[OMAP3_STATE_C6].desc = "MPU OFF + CORE RET";
-
-	/* C7 . MPU OFF + Core OFF */
-	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].exit_latency =
-			cpuidle_params_table[OMAP3_STATE_C7].exit_latency;
-	omap3_power_states[OMAP3_STATE_C7].target_residency =
-			cpuidle_params_table[OMAP3_STATE_C7].target_residency;
-	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 |
-				CPUIDLE_FLAG_CHECK_BM;
-	omap3_power_states[OMAP3_STATE_C7].desc = "MPU OFF + CORE OFF";
-
-	/*
-	 * Erratum i583: implementation for ES rev < Es1.2 on 3630. We cannot
-	 * enable OFF mode in a stable form for previous revisions.
-	 * we disable C7 state as a result.
-	 */
-	if (IS_PM34XX_ERRATUM(PM_SDRC_WAKEUP_ERRATUM_i583)) {
-		omap3_power_states[OMAP3_STATE_C7].valid = 0;
-		cpuidle_params_table[OMAP3_STATE_C7].valid = 0;
-		pr_warn("%s: core off state C7 disabled due to i583\n",
-				__func__);
-	}
-}
-
 struct cpuidle_driver omap3_idle_driver = {
 	.name = 	"omap3_idle",
 	.owner = 	THIS_MODULE,
 };
 
+/* Fill in the state data from the mach tables and register the driver_data */
+static inline struct omap3_idle_statedata *_fill_cstate(
+					struct cpuidle_device *dev,
+					int idx, const char *descr)
+{
+	struct omap3_idle_statedata *cx = &omap3_idle_data[idx];
+	struct cpuidle_state *state = &dev->states[idx];
+
+	state->exit_latency	= cpuidle_params_table[idx].exit_latency;
+	state->target_residency	= cpuidle_params_table[idx].target_residency;
+	state->flags		= CPUIDLE_FLAG_TIME_VALID;
+	state->enter		= omap3_enter_idle_bm;
+	cx->valid		= cpuidle_params_table[idx].valid;
+	sprintf(state->name, "C%d", idx + 1);
+	strncpy(state->desc, descr, CPUIDLE_DESC_LEN);
+	cpuidle_set_statedata(state, cx);
+
+	return cx;
+}
+
 /**
  * omap3_idle_init - Init routine for OMAP3 idle
  *
- * Registers the OMAP3 specific cpuidle driver with the cpuidle
+ * Registers the OMAP3 specific cpuidle driver to the cpuidle
  * framework with the valid set of states.
  */
 int __init omap3_idle_init(void)
 {
-	int i, count = 0;
-	struct omap3_processor_cx *cx;
-	struct cpuidle_state *state;
 	struct cpuidle_device *dev;
+	struct omap3_idle_statedata *cx;
 
 	mpu_pd = pwrdm_lookup("mpu_pwrdm");
 	core_pd = pwrdm_lookup("core_pwrdm");
 	per_pd = pwrdm_lookup("per_pwrdm");
 	cam_pd = pwrdm_lookup("cam_pwrdm");
 
-	omap_init_power_states();
 	cpuidle_register_driver(&omap3_idle_driver);
-
 	dev = &per_cpu(omap3_idle_dev, smp_processor_id());
 
-	for (i = OMAP3_STATE_C1; i < OMAP3_MAX_STATES; i++) {
-		cx = &omap3_power_states[i];
-		state = &dev->states[count];
-
-		if (!cx->valid)
-			continue;
-		cpuidle_set_statedata(state, cx);
-		state->exit_latency = cx->exit_latency;
-		state->target_residency = cx->target_residency;
-		state->flags = cx->flags;
-		state->enter = (state->flags & CPUIDLE_FLAG_CHECK_BM) ?
-			omap3_enter_idle_bm : omap3_enter_idle;
-		if (cx->type == OMAP3_STATE_C1)
-			dev->safe_state = state;
-		sprintf(state->name, "C%d", count+1);
-		strncpy(state->desc, cx->desc, CPUIDLE_DESC_LEN);
-		count++;
-	}
+	/* C1 . MPU WFI + Core active */
+	cx = _fill_cstate(dev, 0, "MPU ON + CORE ON");
+	(&dev->states[0])->enter = omap3_enter_idle;
+	dev->safe_state = &dev->states[0];
+	cx->valid = 1;	/* C1 is always valid */
+	cx->mpu_state = PWRDM_POWER_ON;
+	cx->core_state = PWRDM_POWER_ON;
+
+	/* C2 . MPU WFI + Core inactive */
+	cx = _fill_cstate(dev, 1, "MPU ON + CORE ON");
+	cx->mpu_state = PWRDM_POWER_ON;
+	cx->core_state = PWRDM_POWER_ON;
+
+	/* C3 . MPU CSWR + Core inactive */
+	cx = _fill_cstate(dev, 2, "MPU RET + CORE ON");
+	cx->mpu_state = PWRDM_POWER_RET;
+	cx->core_state = PWRDM_POWER_ON;
+
+	/* C4 . MPU OFF + Core inactive */
+	cx = _fill_cstate(dev, 3, "MPU OFF + CORE ON");
+	cx->mpu_state = PWRDM_POWER_OFF;
+	cx->core_state = PWRDM_POWER_ON;
+
+	/* C5 . MPU RET + Core RET */
+	cx = _fill_cstate(dev, 4, "MPU RET + CORE RET");
+	cx->mpu_state = PWRDM_POWER_RET;
+	cx->core_state = PWRDM_POWER_RET;
 
-	if (!count)
-		return -EINVAL;
-	dev->state_count = count;
+	/* C6 . MPU OFF + Core RET */
+	cx = _fill_cstate(dev, 5, "MPU OFF + CORE RET");
+	cx->mpu_state = PWRDM_POWER_OFF;
+	cx->core_state = PWRDM_POWER_RET;
+
+	/* C7 . MPU OFF + Core OFF */
+	cx = _fill_cstate(dev, 6, "MPU OFF + CORE OFF");
+	/*
+	 * Erratum i583: implementation for ES rev < Es1.2 on 3630. We cannot
+	 * enable OFF mode in a stable form for previous revisions.
+	 * We disable C7 state as a result.
+	 */
+	if (IS_PM34XX_ERRATUM(PM_SDRC_WAKEUP_ERRATUM_i583)) {
+		cx->valid = 0;
+		pr_warn("%s: core off state C7 disabled due to i583\n",
+			__func__);
+	}
+	cx->mpu_state = PWRDM_POWER_OFF;
+	cx->core_state = PWRDM_POWER_OFF;
 
 	if (enable_off_mode)
 		omap3_cpuidle_update_states(PWRDM_POWER_OFF, PWRDM_POWER_OFF);
 	else
 		omap3_cpuidle_update_states(PWRDM_POWER_RET, PWRDM_POWER_RET);
 
+	dev->state_count = OMAP3_NUM_STATES;
 	if (cpuidle_register_device(dev)) {
 		printk(KERN_ERR "%s: CPUidle register device failed\n",
 		       __func__);