* Copyright (C) 2007-2009 Nokia Corporation
*
* Written by Paul Walmsley
- *
* Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@ti.com>
+ * State counting code by Tero Kristo <tero.kristo@nokia.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
#define OMAP_MEM4_ONSTATE_MASK OMAP4430_OCP_NRET_BANK_ONSTATE_MASK
/* OMAP3 and OMAP4 Memory Retstate Masks (common across all power domains) */
-#define OMAP_MEM0_RETSTATE_MASK OMAP3430_SHAREDL1CACHEFLATRETSTATE
-#define OMAP_MEM1_RETSTATE_MASK OMAP3430_L1FLATMEMRETSTATE
-#define OMAP_MEM2_RETSTATE_MASK OMAP3430_SHAREDL2CACHEFLATRETSTATE
-#define OMAP_MEM3_RETSTATE_MASK OMAP3430_L2FLATMEMRETSTATE
+#define OMAP_MEM0_RETSTATE_MASK OMAP3430_SHAREDL1CACHEFLATRETSTATE_MASK
+#define OMAP_MEM1_RETSTATE_MASK OMAP3430_L1FLATMEMRETSTATE_MASK
+#define OMAP_MEM2_RETSTATE_MASK OMAP3430_SHAREDL2CACHEFLATRETSTATE_MASK
+#define OMAP_MEM3_RETSTATE_MASK OMAP3430_L2FLATMEMRETSTATE_MASK
#define OMAP_MEM4_RETSTATE_MASK OMAP4430_OCP_NRET_BANK_RETSTATE_MASK
/* OMAP3 and OMAP4 Memory Status bits */
for (i = 0; i < PWRDM_MAX_PWRSTS; i++)
pwrdm->state_counter[i] = 0;
+ pwrdm->ret_logic_off_counter = 0;
+ for (i = 0; i < pwrdm->banks; i++)
+ pwrdm->ret_mem_off_counter[i] = 0;
+
pwrdm_wait_transition(pwrdm);
pwrdm->state = pwrdm_read_pwrst(pwrdm);
pwrdm->state_counter[pwrdm->state] = 1;
return 0;
}
+static void _update_logic_membank_counters(struct powerdomain *pwrdm)
+{
+ int i;
+ u8 prev_logic_pwrst, prev_mem_pwrst;
+
+ prev_logic_pwrst = pwrdm_read_prev_logic_pwrst(pwrdm);
+ if ((pwrdm->pwrsts_logic_ret == PWRSTS_OFF_RET) &&
+ (prev_logic_pwrst == PWRDM_POWER_OFF))
+ pwrdm->ret_logic_off_counter++;
+
+ for (i = 0; i < pwrdm->banks; i++) {
+ prev_mem_pwrst = pwrdm_read_prev_mem_pwrst(pwrdm, i);
+
+ if ((pwrdm->pwrsts_mem_ret[i] == PWRSTS_OFF_RET) &&
+ (prev_mem_pwrst == PWRDM_POWER_OFF))
+ pwrdm->ret_mem_off_counter[i]++;
+ }
+}
+
static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag)
{
prev = pwrdm_read_prev_pwrst(pwrdm);
if (pwrdm->state != prev)
pwrdm->state_counter[prev]++;
+ if (prev == PWRDM_POWER_RET)
+ _update_logic_membank_counters(pwrdm);
break;
default:
return -EINVAL;
/**
* pwrdm_init - set up the powerdomain layer
+ * @pwrdm_list: array of struct powerdomain pointers to register
*
- * Loop through the list of powerdomains, registering all that are
- * available on the current CPU. If pwrdm_list is supplied and not
- * null, all of the referenced powerdomains will be registered. No
- * return value.
+ * Loop through the array of powerdomains @pwrdm_list, registering all
+ * that are available on the current CPU. If pwrdm_list is supplied
+ * and not null, all of the referenced powerdomains will be
+ * registered. No return value. XXX pwrdm_list is not really a
+ * "list"; it is an array. Rename appropriately.
*/
void pwrdm_init(struct powerdomain **pwrdm_list)
{
struct powerdomain **p = NULL;
- if (cpu_is_omap24xx() | cpu_is_omap34xx()) {
+ if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
pwrstctrl_reg_offs = OMAP2_PM_PWSTCTRL;
pwrstst_reg_offs = OMAP2_PM_PWSTST;
} else if (cpu_is_omap44xx()) {
* pwrdm_lookup - look up a powerdomain by name, return a pointer
* @name: name of powerdomain
*
- * Find a registered powerdomain by its name. Returns a pointer to the
- * struct powerdomain if found, or NULL otherwise.
+ * Find a registered powerdomain by its name @name. Returns a pointer
+ * to the struct powerdomain if found, or NULL otherwise.
*/
struct powerdomain *pwrdm_lookup(const char *name)
{
* pwrdm_for_each - call function on each registered clockdomain
* @fn: callback function *
*
- * Call the supplied function for each registered powerdomain. The
- * callback function can return anything but 0 to bail out early from
- * the iterator. Returns the last return value of the callback function, which
- * should be 0 for success or anything else to indicate failure; or -EINVAL if
- * the function pointer is null.
+ * Call the supplied function @fn for each registered powerdomain.
+ * The callback function @fn can return anything but 0 to bail out
+ * early from the iterator. Returns the last return value of the
+ * callback function, which should be 0 for success or anything else
+ * to indicate failure; or -EINVAL if the function pointer is null.
*/
int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user),
void *user)
* @pwrdm: struct powerdomain * to add the clockdomain to
* @clkdm: struct clockdomain * to associate with a powerdomain
*
- * Associate the clockdomain 'clkdm' with a powerdomain 'pwrdm'. This
+ * Associate the clockdomain @clkdm with a powerdomain @pwrdm. This
* enables the use of pwrdm_for_each_clkdm(). Returns -EINVAL if
* presented with invalid pointers; -ENOMEM if memory could not be allocated;
* or 0 upon success.
* @pwrdm: struct powerdomain * to add the clockdomain to
* @clkdm: struct clockdomain * to associate with a powerdomain
*
- * Dissociate the clockdomain 'clkdm' from the powerdomain
- * 'pwrdm'. Returns -EINVAL if presented with invalid pointers;
- * -ENOENT if the clkdm was not associated with the powerdomain, or 0
- * upon success.
+ * Dissociate the clockdomain @clkdm from the powerdomain
+ * @pwrdm. Returns -EINVAL if presented with invalid pointers; -ENOENT
+ * if @clkdm was not associated with the powerdomain, or 0 upon
+ * success.
*/
int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm)
{
* @pwrdm: struct powerdomain * to iterate over
* @fn: callback function *
*
- * Call the supplied function for each clockdomain in the powerdomain
- * 'pwrdm'. The callback function can return anything but 0 to bail
+ * Call the supplied function @fn for each clockdomain in the powerdomain
+ * @pwrdm. The callback function can return anything but 0 to bail
* out early from the iterator. Returns -EINVAL if presented with
* invalid pointers; or passes along the last return value of the
* callback function, which should be 0 for success or anything else
* pwrdm_get_mem_bank_count - get number of memory banks in this powerdomain
* @pwrdm: struct powerdomain *
*
- * Return the number of controllable memory banks in powerdomain pwrdm,
+ * Return the number of controllable memory banks in powerdomain @pwrdm,
* starting with 1. Returns -EINVAL if the powerdomain pointer is null.
*/
int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm)
* @pwrdm: struct powerdomain * to set
* @pwrst: one of the PWRDM_POWER_* macros
*
- * Set the powerdomain pwrdm's next power state to pwrst. The powerdomain
+ * Set the powerdomain @pwrdm's next power state to @pwrst. The powerdomain
* may not enter this state immediately if the preconditions for this state
* have not been satisfied. Returns -EINVAL if the powerdomain pointer is
* null or if the power state is invalid for the powerdomin, or returns 0
* pwrdm_read_next_pwrst - get next powerdomain power state
* @pwrdm: struct powerdomain * to get power state
*
- * Return the powerdomain pwrdm's next power state. Returns -EINVAL
+ * Return the powerdomain @pwrdm's next power state. Returns -EINVAL
* if the powerdomain pointer is null or returns the next power state
* upon success.
*/
* pwrdm_read_pwrst - get current powerdomain power state
* @pwrdm: struct powerdomain * to get power state
*
- * Return the powerdomain pwrdm's current power state. Returns -EINVAL
+ * Return the powerdomain @pwrdm's current power state. Returns -EINVAL
* if the powerdomain pointer is null or returns the current power state
* upon success.
*/
* pwrdm_read_prev_pwrst - get previous powerdomain power state
* @pwrdm: struct powerdomain * to get previous power state
*
- * Return the powerdomain pwrdm's previous power state. Returns -EINVAL
+ * Return the powerdomain @pwrdm's previous power state. Returns -EINVAL
* if the powerdomain pointer is null or returns the previous power state
* upon success.
*/
* @pwrdm: struct powerdomain * to set
* @pwrst: one of the PWRDM_POWER_* macros
*
- * Set the next power state that the logic portion of the powerdomain
- * pwrdm will enter when the powerdomain enters retention. This will
- * be either RETENTION or OFF, if supported. Returns -EINVAL if the
- * powerdomain pointer is null or the target power state is not not
- * supported, or returns 0 upon success.
+ * Set the next power state @pwrst that the logic portion of the
+ * powerdomain @pwrdm will enter when the powerdomain enters retention.
+ * This will be either RETENTION or OFF, if supported. Returns
+ * -EINVAL if the powerdomain pointer is null or the target power
+ * state is not not supported, or returns 0 upon success.
*/
int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
{
+ u32 v;
+
if (!pwrdm)
return -EINVAL;
* but the type of value returned is the same for each
* powerdomain.
*/
- prm_rmw_mod_reg_bits(OMAP3430_LOGICL1CACHERETSTATE,
- (pwrst << __ffs(OMAP3430_LOGICL1CACHERETSTATE)),
- pwrdm->prcm_offs, pwrstctrl_reg_offs);
+ v = pwrst << __ffs(OMAP3430_LOGICL1CACHERETSTATE_MASK);
+ prm_rmw_mod_reg_bits(OMAP3430_LOGICL1CACHERETSTATE_MASK, v,
+ pwrdm->prcm_offs, pwrstctrl_reg_offs);
return 0;
}
* @bank: memory bank number to set (0-3)
* @pwrst: one of the PWRDM_POWER_* macros
*
- * Set the next power state that memory bank x of the powerdomain
- * pwrdm will enter when the powerdomain enters the ON state. Bank
- * will be a number from 0 to 3, and represents different types of
- * memory, depending on the powerdomain. Returns -EINVAL if the
- * powerdomain pointer is null or the target power state is not not
- * supported for this memory bank, -EEXIST if the target memory bank
- * does not exist or is not controllable, or returns 0 upon success.
+ * Set the next power state @pwrst that memory bank @bank of the
+ * powerdomain @pwrdm will enter when the powerdomain enters the ON
+ * state. @bank will be a number from 0 to 3, and represents different
+ * types of memory, depending on the powerdomain. Returns -EINVAL if
+ * the powerdomain pointer is null or the target power state is not
+ * not supported for this memory bank, -EEXIST if the target memory
+ * bank does not exist or is not controllable, or returns 0 upon
+ * success.
*/
int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
{
* @bank: memory bank number to set (0-3)
* @pwrst: one of the PWRDM_POWER_* macros
*
- * Set the next power state that memory bank x of the powerdomain
- * pwrdm will enter when the powerdomain enters the RETENTION state.
- * Bank will be a number from 0 to 3, and represents different types
- * of memory, depending on the powerdomain. pwrst will be either
- * RETENTION or OFF, if supported. Returns -EINVAL if the powerdomain
- * pointer is null or the target power state is not not supported for
- * this memory bank, -EEXIST if the target memory bank does not exist
- * or is not controllable, or returns 0 upon success.
+ * Set the next power state @pwrst that memory bank @bank of the
+ * powerdomain @pwrdm will enter when the powerdomain enters the
+ * RETENTION state. Bank will be a number from 0 to 3, and represents
+ * different types of memory, depending on the powerdomain. @pwrst
+ * will be either RETENTION or OFF, if supported. Returns -EINVAL if
+ * the powerdomain pointer is null or the target power state is not
+ * not supported for this memory bank, -EEXIST if the target memory
+ * bank does not exist or is not controllable, or returns 0 upon
+ * success.
*/
int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
{
* pwrdm_read_logic_pwrst - get current powerdomain logic retention power state
* @pwrdm: struct powerdomain * to get current logic retention power state
*
- * Return the current power state that the logic portion of
- * powerdomain pwrdm will enter
- * Returns -EINVAL if the powerdomain pointer is null or returns the
- * current logic retention power state upon success.
+ * Return the power state that the logic portion of powerdomain @pwrdm
+ * will enter when the powerdomain enters retention. Returns -EINVAL
+ * if the powerdomain pointer is null or returns the logic retention
+ * power state upon success.
*/
int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm)
{
if (!pwrdm)
return -EINVAL;
- return prm_read_mod_bits_shift(pwrdm->prcm_offs,
- pwrstst_reg_offs, OMAP3430_LOGICSTATEST);
+ return prm_read_mod_bits_shift(pwrdm->prcm_offs, pwrstst_reg_offs,
+ OMAP3430_LOGICSTATEST_MASK);
}
/**
* pwrdm_read_prev_logic_pwrst - get previous powerdomain logic power state
* @pwrdm: struct powerdomain * to get previous logic power state
*
- * Return the powerdomain pwrdm's logic power state. Returns -EINVAL
- * if the powerdomain pointer is null or returns the previous logic
- * power state upon success.
+ * Return the powerdomain @pwrdm's previous logic power state. Returns
+ * -EINVAL if the powerdomain pointer is null or returns the previous
+ * logic power state upon success.
*/
int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm)
{
* powerdomain.
*/
return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP3430_PM_PREPWSTST,
- OMAP3430_LASTLOGICSTATEENTERED);
+ OMAP3430_LASTLOGICSTATEENTERED_MASK);
+}
+
+/**
+ * pwrdm_read_logic_retst - get next powerdomain logic power state
+ * @pwrdm: struct powerdomain * to get next logic power state
+ *
+ * Return the powerdomain pwrdm's logic power state. Returns -EINVAL
+ * if the powerdomain pointer is null or returns the next logic
+ * power state upon success.
+ */
+int pwrdm_read_logic_retst(struct powerdomain *pwrdm)
+{
+ if (!pwrdm)
+ return -EINVAL;
+
+ /*
+ * The register bit names below may not correspond to the
+ * actual names of the bits in each powerdomain's register,
+ * but the type of value returned is the same for each
+ * powerdomain.
+ */
+ return prm_read_mod_bits_shift(pwrdm->prcm_offs, pwrstctrl_reg_offs,
+ OMAP3430_LOGICSTATEST_MASK);
}
/**
* @pwrdm: struct powerdomain * to get current memory bank power state
* @bank: memory bank number (0-3)
*
- * Return the powerdomain pwrdm's current memory power state for bank
- * x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
+ * Return the powerdomain @pwrdm's current memory power state for bank
+ * @bank. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
* the target memory bank does not exist or is not controllable, or
* returns the current memory power state upon success.
*/
* @pwrdm: struct powerdomain * to get previous memory bank power state
* @bank: memory bank number (0-3)
*
- * Return the powerdomain pwrdm's previous memory power state for bank
- * x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
- * the target memory bank does not exist or is not controllable, or
- * returns the previous memory power state upon success.
+ * Return the powerdomain @pwrdm's previous memory power state for
+ * bank @bank. Returns -EINVAL if the powerdomain pointer is null,
+ * -EEXIST if the target memory bank does not exist or is not
+ * controllable, or returns the previous memory power state upon
+ * success.
*/
int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
{
}
/**
+ * pwrdm_read_mem_retst - get next memory bank power state
+ * @pwrdm: struct powerdomain * to get mext memory bank power state
+ * @bank: memory bank number (0-3)
+ *
+ * Return the powerdomain pwrdm's next memory power state for bank
+ * x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
+ * the target memory bank does not exist or is not controllable, or
+ * returns the next memory power state upon success.
+ */
+int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
+{
+ u32 m;
+
+ if (!pwrdm)
+ return -EINVAL;
+
+ if (pwrdm->banks < (bank + 1))
+ return -EEXIST;
+
+ /*
+ * The register bit names below may not correspond to the
+ * actual names of the bits in each powerdomain's register,
+ * but the type of value returned is the same for each
+ * powerdomain.
+ */
+ switch (bank) {
+ case 0:
+ m = OMAP_MEM0_RETSTATE_MASK;
+ break;
+ case 1:
+ m = OMAP_MEM1_RETSTATE_MASK;
+ break;
+ case 2:
+ m = OMAP_MEM2_RETSTATE_MASK;
+ break;
+ case 3:
+ m = OMAP_MEM3_RETSTATE_MASK;
+ break;
+ case 4:
+ m = OMAP_MEM4_RETSTATE_MASK;
+ default:
+ WARN_ON(1); /* should never happen */
+ return -EEXIST;
+ }
+
+ return prm_read_mod_bits_shift(pwrdm->prcm_offs,
+ pwrstctrl_reg_offs, m);
+}
+
+/**
* pwrdm_clear_all_prev_pwrst - clear previous powerstate register for a pwrdm
* @pwrdm: struct powerdomain * to clear
*
- * Clear the powerdomain's previous power state register. Clears the
- * entire register, including logic and memory bank previous power states.
- * Returns -EINVAL if the powerdomain pointer is null, or returns 0 upon
- * success.
+ * Clear the powerdomain's previous power state register @pwrdm.
+ * Clears the entire register, including logic and memory bank
+ * previous power states. Returns -EINVAL if the powerdomain pointer
+ * is null, or returns 0 upon success.
*/
int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)
{
* @pwrdm: struct powerdomain *
*
* Enable automatic context save-and-restore upon power state change
- * for some devices in a powerdomain. Warning: this only affects a
- * subset of devices in a powerdomain; check the TRM closely. Returns
- * -EINVAL if the powerdomain pointer is null or if the powerdomain
- * does not support automatic save-and-restore, or returns 0 upon
- * success.
+ * for some devices in the powerdomain @pwrdm. Warning: this only
+ * affects a subset of devices in a powerdomain; check the TRM
+ * closely. Returns -EINVAL if the powerdomain pointer is null or if
+ * the powerdomain does not support automatic save-and-restore, or
+ * returns 0 upon success.
*/
int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm)
{
* @pwrdm: struct powerdomain *
*
* Disable automatic context save-and-restore upon power state change
- * for some devices in a powerdomain. Warning: this only affects a
- * subset of devices in a powerdomain; check the TRM closely. Returns
- * -EINVAL if the powerdomain pointer is null or if the powerdomain
- * does not support automatic save-and-restore, or returns 0 upon
- * success.
+ * for some devices in the powerdomain @pwrdm. Warning: this only
+ * affects a subset of devices in a powerdomain; check the TRM
+ * closely. Returns -EINVAL if the powerdomain pointer is null or if
+ * the powerdomain does not support automatic save-and-restore, or
+ * returns 0 upon success.
*/
int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm)
{
* pwrdm_has_hdwr_sar - test whether powerdomain supports hardware SAR
* @pwrdm: struct powerdomain *
*
- * Returns 1 if powerdomain 'pwrdm' supports hardware save-and-restore
+ * Returns 1 if powerdomain @pwrdm supports hardware save-and-restore
* for some devices, or 0 if it does not.
*/
bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm)
}
/**
+ * pwrdm_set_lowpwrstchange - Request a low power state change
+ * @pwrdm: struct powerdomain *
+ *
+ * Allows a powerdomain to transtion to a lower power sleep state
+ * from an existing sleep state without waking up the powerdomain.
+ * Returns -EINVAL if the powerdomain pointer is null or if the
+ * powerdomain does not support LOWPOWERSTATECHANGE, or returns 0
+ * upon success.
+ */
+int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)
+{
+ if (!pwrdm)
+ return -EINVAL;
+
+ if (!(pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE))
+ return -EINVAL;
+
+ pr_debug("powerdomain: %s: setting LOWPOWERSTATECHANGE bit\n",
+ pwrdm->name);
+
+ prm_rmw_mod_reg_bits(OMAP4430_LOWPOWERSTATECHANGE_MASK,
+ (1 << OMAP4430_LOWPOWERSTATECHANGE_SHIFT),
+ pwrdm->prcm_offs, pwrstctrl_reg_offs);
+
+ return 0;
+}
+
+/**
* pwrdm_wait_transition - wait for powerdomain power transition to finish
* @pwrdm: struct powerdomain * to wait for
*
- * If the powerdomain pwrdm is in the process of a state transition,
+ * If the powerdomain @pwrdm is in the process of a state transition,
* spin until it completes the power transition, or until an iteration
* bailout value is reached. Returns -EINVAL if the powerdomain
* pointer is null, -EAGAIN if the bailout value was reached, or
/* XXX Is this udelay() value meaningful? */
while ((prm_read_mod_reg(pwrdm->prcm_offs, pwrstst_reg_offs) &
- OMAP_INTRANSITION) &&
+ OMAP_INTRANSITION_MASK) &&
(c++ < PWRDM_TRANSITION_BAILOUT))
udelay(1);
return -EINVAL;
}
-int pwrdm_clk_state_switch(struct clk *clk)
-{
- if (clk != NULL && clk->clkdm != NULL)
- return pwrdm_clkdm_state_switch(clk->clkdm);
- return -EINVAL;
-}
int pwrdm_pre_transition(void)
{
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff