diff options
Diffstat (limited to 'arch/arm/mach-omap2/powerdomain.c')
| -rw-r--r-- | arch/arm/mach-omap2/powerdomain.c | 776 |
1 files changed, 294 insertions, 482 deletions
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c index 26b3f3ee82a3..9a0fb385622b 100644 --- a/arch/arm/mach-omap2/powerdomain.c +++ b/arch/arm/mach-omap2/powerdomain.c @@ -2,10 +2,12 @@ * OMAP powerdomain control * * Copyright (C) 2007-2008 Texas Instruments, Inc. - * Copyright (C) 2007-2008 Nokia Corporation + * Copyright (C) 2007-2009 Nokia Corporation * * Written by Paul Walmsley * + * Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@ti.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 * published by the Free Software Foundation. @@ -26,12 +28,15 @@ #include "cm.h" #include "cm-regbits-34xx.h" +#include "cm-regbits-44xx.h" #include "prm.h" #include "prm-regbits-34xx.h" +#include "prm-regbits-44xx.h" #include <plat/cpu.h> #include <plat/powerdomain.h> #include <plat/clockdomain.h> +#include <plat/prcm.h> #include "pm.h" @@ -40,28 +45,42 @@ enum { PWRDM_STATE_PREV, }; -/* pwrdm_list contains all registered struct powerdomains */ -static LIST_HEAD(pwrdm_list); +/* Variable holding value of the CPU dependent PWRSTCTRL Register Offset */ +static u16 pwrstctrl_reg_offs; -/* - * pwrdm_rwlock protects pwrdm_list add and del ops - also reused to - * protect pwrdm_clkdms[] during clkdm add/del ops - */ -static DEFINE_RWLOCK(pwrdm_rwlock); +/* Variable holding value of the CPU dependent PWRSTST Register Offset */ +static u16 pwrstst_reg_offs; +/* OMAP3 and OMAP4 specific register bit initialisations + * Notice that the names here are not according to each power + * domain but the bit mapping used applies to all of them + */ -/* Private functions */ - -static u32 prm_read_mod_bits_shift(s16 domain, s16 idx, u32 mask) -{ - u32 v; +/* OMAP3 and OMAP4 Memory Onstate Masks (common across all power domains) */ +#define OMAP_MEM0_ONSTATE_MASK OMAP3430_SHAREDL1CACHEFLATONSTATE_MASK +#define OMAP_MEM1_ONSTATE_MASK OMAP3430_L1FLATMEMONSTATE_MASK +#define OMAP_MEM2_ONSTATE_MASK OMAP3430_SHAREDL2CACHEFLATONSTATE_MASK +#define OMAP_MEM3_ONSTATE_MASK OMAP3430_L2FLATMEMONSTATE_MASK +#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_MEM4_RETSTATE_MASK OMAP4430_OCP_NRET_BANK_RETSTATE_MASK + +/* OMAP3 and OMAP4 Memory Status bits */ +#define OMAP_MEM0_STATEST_MASK OMAP3430_SHAREDL1CACHEFLATSTATEST_MASK +#define OMAP_MEM1_STATEST_MASK OMAP3430_L1FLATMEMSTATEST_MASK +#define OMAP_MEM2_STATEST_MASK OMAP3430_SHAREDL2CACHEFLATSTATEST_MASK +#define OMAP_MEM3_STATEST_MASK OMAP3430_L2FLATMEMSTATEST_MASK +#define OMAP_MEM4_STATEST_MASK OMAP4430_OCP_NRET_BANK_STATEST_MASK - v = prm_read_mod_reg(domain, idx); - v &= mask; - v >>= __ffs(mask); +/* pwrdm_list contains all registered struct powerdomains */ +static LIST_HEAD(pwrdm_list); - return v; -} +/* Private functions */ static struct powerdomain *_pwrdm_lookup(const char *name) { @@ -79,32 +98,63 @@ static struct powerdomain *_pwrdm_lookup(const char *name) return pwrdm; } -/* _pwrdm_deps_lookup - look up the specified powerdomain in a pwrdm list */ -static struct powerdomain *_pwrdm_deps_lookup(struct powerdomain *pwrdm, - struct pwrdm_dep *deps) +/** + * _pwrdm_register - register a powerdomain + * @pwrdm: struct powerdomain * to register + * + * Adds a powerdomain to the internal powerdomain list. Returns + * -EINVAL if given a null pointer, -EEXIST if a powerdomain is + * already registered by the provided name, or 0 upon success. + */ +static int _pwrdm_register(struct powerdomain *pwrdm) { - struct pwrdm_dep *pd; + int i; + + if (!pwrdm) + return -EINVAL; + + if (!omap_chip_is(pwrdm->omap_chip)) + return -EINVAL; - if (!pwrdm || !deps || !omap_chip_is(pwrdm->omap_chip)) - return ERR_PTR(-EINVAL); + if (_pwrdm_lookup(pwrdm->name)) + return -EEXIST; - for (pd = deps; pd->pwrdm_name; pd++) { + list_add(&pwrdm->node, &pwrdm_list); - if (!omap_chip_is(pd->omap_chip)) - continue; + /* Initialize the powerdomain's state counter */ + for (i = 0; i < PWRDM_MAX_PWRSTS; i++) + pwrdm->state_counter[i] = 0; - if (!pd->pwrdm && pd->pwrdm_name) - pd->pwrdm = pwrdm_lookup(pd->pwrdm_name); + pwrdm->ret_logic_off_counter = 0; + for (i = 0; i < pwrdm->banks; i++) + pwrdm->ret_mem_off_counter[i] = 0; - if (pd->pwrdm == pwrdm) - break; + pwrdm_wait_transition(pwrdm); + pwrdm->state = pwrdm_read_pwrst(pwrdm); + pwrdm->state_counter[pwrdm->state] = 1; - } + pr_debug("powerdomain: registered %s\n", pwrdm->name); - if (!pd->pwrdm_name) - return ERR_PTR(-ENOENT); + return 0; +} - return pd->pwrdm; +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) @@ -126,6 +176,8 @@ 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; @@ -154,134 +206,71 @@ static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused) return 0; } -static __init void _pwrdm_setup(struct powerdomain *pwrdm) -{ - int i; - - for (i = 0; i < PWRDM_MAX_PWRSTS; i++) - pwrdm->state_counter[i] = 0; - - pwrdm_wait_transition(pwrdm); - pwrdm->state = pwrdm_read_pwrst(pwrdm); - pwrdm->state_counter[pwrdm->state] = 1; - -} - /* Public functions */ /** * 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 (pwrdm_list) { - for (p = pwrdm_list; *p; p++) { - pwrdm_register(*p); - _pwrdm_setup(*p); - } + if (cpu_is_omap24xx() | cpu_is_omap34xx()) { + pwrstctrl_reg_offs = OMAP2_PM_PWSTCTRL; + pwrstst_reg_offs = OMAP2_PM_PWSTST; + } else if (cpu_is_omap44xx()) { + pwrstctrl_reg_offs = OMAP4_PM_PWSTCTRL; + pwrstst_reg_offs = OMAP4_PM_PWSTST; + } else { + printk(KERN_ERR "Power Domain struct not supported for " \ + "this CPU\n"); + return; } -} - -/** - * pwrdm_register - register a powerdomain - * @pwrdm: struct powerdomain * to register - * - * Adds a powerdomain to the internal powerdomain list. Returns - * -EINVAL if given a null pointer, -EEXIST if a powerdomain is - * already registered by the provided name, or 0 upon success. - */ -int pwrdm_register(struct powerdomain *pwrdm) -{ - unsigned long flags; - int ret = -EINVAL; - - if (!pwrdm) - return -EINVAL; - if (!omap_chip_is(pwrdm->omap_chip)) - return -EINVAL; - - write_lock_irqsave(&pwrdm_rwlock, flags); - if (_pwrdm_lookup(pwrdm->name)) { - ret = -EEXIST; - goto pr_unlock; + if (pwrdm_list) { + for (p = pwrdm_list; *p; p++) + _pwrdm_register(*p); } - - list_add(&pwrdm->node, &pwrdm_list); - - pr_debug("powerdomain: registered %s\n", pwrdm->name); - ret = 0; - -pr_unlock: - write_unlock_irqrestore(&pwrdm_rwlock, flags); - - return ret; -} - -/** - * pwrdm_unregister - unregister a powerdomain - * @pwrdm: struct powerdomain * to unregister - * - * Removes a powerdomain from the internal powerdomain list. Returns - * -EINVAL if pwrdm argument is NULL. - */ -int pwrdm_unregister(struct powerdomain *pwrdm) -{ - unsigned long flags; - - if (!pwrdm) - return -EINVAL; - - write_lock_irqsave(&pwrdm_rwlock, flags); - list_del(&pwrdm->node); - write_unlock_irqrestore(&pwrdm_rwlock, flags); - - pr_debug("powerdomain: unregistered %s\n", pwrdm->name); - - return 0; } /** * 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) { struct powerdomain *pwrdm; - unsigned long flags; if (!name) return NULL; - read_lock_irqsave(&pwrdm_rwlock, flags); pwrdm = _pwrdm_lookup(name); - read_unlock_irqrestore(&pwrdm_rwlock, flags); return pwrdm; } /** - * pwrdm_for_each_nolock - call function on each registered clockdomain + * 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_nolock(int (*fn)(struct powerdomain *pwrdm, void *user), - void *user) +int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user), + void *user) { struct powerdomain *temp_pwrdm; int ret = 0; @@ -299,40 +288,17 @@ int pwrdm_for_each_nolock(int (*fn)(struct powerdomain *pwrdm, void *user), } /** - * pwrdm_for_each - call function on each registered clockdomain - * @fn: callback function * - * - * This function is the same as 'pwrdm_for_each_nolock()', but keeps the - * &pwrdm_rwlock locked for reading, so no powerdomain structure manipulation - * functions should be called from the callback, although hardware powerdomain - * control functions are fine. - */ -int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user), - void *user) -{ - unsigned long flags; - int ret; - - read_lock_irqsave(&pwrdm_rwlock, flags); - ret = pwrdm_for_each_nolock(fn, user); - read_unlock_irqrestore(&pwrdm_rwlock, flags); - - return ret; -} - -/** * pwrdm_add_clkdm - add a clockdomain to a powerdomain * @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. */ int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) { - unsigned long flags; int i; int ret = -EINVAL; @@ -342,8 +308,6 @@ int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) pr_debug("powerdomain: associating clockdomain %s with powerdomain " "%s\n", clkdm->name, pwrdm->name); - write_lock_irqsave(&pwrdm_rwlock, flags); - for (i = 0; i < PWRDM_MAX_CLKDMS; i++) { if (!pwrdm->pwrdm_clkdms[i]) break; @@ -368,8 +332,6 @@ int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) ret = 0; pac_exit: - write_unlock_irqrestore(&pwrdm_rwlock, flags); - return ret; } @@ -378,14 +340,13 @@ pac_exit: * @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) { - unsigned long flags; int ret = -EINVAL; int i; @@ -395,8 +356,6 @@ int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) pr_debug("powerdomain: dissociating clockdomain %s from powerdomain " "%s\n", clkdm->name, pwrdm->name); - write_lock_irqsave(&pwrdm_rwlock, flags); - for (i = 0; i < PWRDM_MAX_CLKDMS; i++) if (pwrdm->pwrdm_clkdms[i] == clkdm) break; @@ -413,8 +372,6 @@ int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm) ret = 0; pdc_exit: - write_unlock_irqrestore(&pwrdm_rwlock, flags); - return ret; } @@ -423,259 +380,34 @@ pdc_exit: * @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 - * out early from the iterator. The callback function is called with - * the pwrdm_rwlock held for reading, so no powerdomain structure - * manipulation functions should be called from the callback, although - * hardware powerdomain control functions are fine. 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 to indicate failure. + * 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 + * to indicate failure. */ int pwrdm_for_each_clkdm(struct powerdomain *pwrdm, int (*fn)(struct powerdomain *pwrdm, struct clockdomain *clkdm)) { - unsigned long flags; int ret = 0; int i; if (!fn) return -EINVAL; - read_lock_irqsave(&pwrdm_rwlock, flags); - for (i = 0; i < PWRDM_MAX_CLKDMS && !ret; i++) ret = (*fn)(pwrdm, pwrdm->pwrdm_clkdms[i]); - read_unlock_irqrestore(&pwrdm_rwlock, flags); - return ret; } - -/** - * pwrdm_add_wkdep - add a wakeup dependency from pwrdm2 to pwrdm1 - * @pwrdm1: wake this struct powerdomain * up (dependent) - * @pwrdm2: when this struct powerdomain * wakes up (source) - * - * When the powerdomain represented by pwrdm2 wakes up (due to an - * interrupt), wake up pwrdm1. Implemented in hardware on the OMAP, - * this feature is designed to reduce wakeup latency of the dependent - * powerdomain. Returns -EINVAL if presented with invalid powerdomain - * pointers, -ENOENT if pwrdm2 cannot wake up pwrdm1 in hardware, or - * 0 upon success. - */ -int pwrdm_add_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2) -{ - struct powerdomain *p; - - if (!pwrdm1) - return -EINVAL; - - p = _pwrdm_deps_lookup(pwrdm2, pwrdm1->wkdep_srcs); - if (IS_ERR(p)) { - pr_debug("powerdomain: hardware cannot set/clear wake up of " - "%s when %s wakes up\n", pwrdm1->name, pwrdm2->name); - return PTR_ERR(p); - } - - pr_debug("powerdomain: hardware will wake up %s when %s wakes up\n", - pwrdm1->name, pwrdm2->name); - - prm_set_mod_reg_bits((1 << pwrdm2->dep_bit), - pwrdm1->prcm_offs, PM_WKDEP); - - return 0; -} - -/** - * pwrdm_del_wkdep - remove a wakeup dependency from pwrdm2 to pwrdm1 - * @pwrdm1: wake this struct powerdomain * up (dependent) - * @pwrdm2: when this struct powerdomain * wakes up (source) - * - * Remove a wakeup dependency that causes pwrdm1 to wake up when pwrdm2 - * wakes up. Returns -EINVAL if presented with invalid powerdomain - * pointers, -ENOENT if pwrdm2 cannot wake up pwrdm1 in hardware, or - * 0 upon success. - */ -int pwrdm_del_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2) -{ - struct powerdomain *p; - - if (!pwrdm1) - return -EINVAL; - - p = _pwrdm_deps_lookup(pwrdm2, pwrdm1->wkdep_srcs); - if (IS_ERR(p)) { - pr_debug("powerdomain: hardware cannot set/clear wake up of " - "%s when %s wakes up\n", pwrdm1->name, pwrdm2->name); - return PTR_ERR(p); - } - - pr_debug("powerdomain: hardware will no longer wake up %s after %s " - "wakes up\n", pwrdm1->name, pwrdm2->name); - - prm_clear_mod_reg_bits((1 << pwrdm2->dep_bit), - pwrdm1->prcm_offs, PM_WKDEP); - - return 0; -} - -/** - * pwrdm_read_wkdep - read wakeup dependency state from pwrdm2 to pwrdm1 - * @pwrdm1: wake this struct powerdomain * up (dependent) - * @pwrdm2: when this struct powerdomain * wakes up (source) - * - * Return 1 if a hardware wakeup dependency exists wherein pwrdm1 will be - * awoken when pwrdm2 wakes up; 0 if dependency is not set; -EINVAL - * if either powerdomain pointer is invalid; or -ENOENT if the hardware - * is incapable. - * - * REVISIT: Currently this function only represents software-controllable - * wakeup dependencies. Wakeup dependencies fixed in hardware are not - * yet handled here. - */ -int pwrdm_read_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2) -{ - struct powerdomain *p; - - if (!pwrdm1) - return -EINVAL; - - p = _pwrdm_deps_lookup(pwrdm2, pwrdm1->wkdep_srcs); - if (IS_ERR(p)) { - pr_debug("powerdomain: hardware cannot set/clear wake up of " - "%s when %s wakes up\n", pwrdm1->name, pwrdm2->name); - return PTR_ERR(p); - } - - return prm_read_mod_bits_shift(pwrdm1->prcm_offs, PM_WKDEP, - (1 << pwrdm2->dep_bit)); -} - -/** - * pwrdm_add_sleepdep - add a sleep dependency from pwrdm2 to pwrdm1 - * @pwrdm1: prevent this struct powerdomain * from sleeping (dependent) - * @pwrdm2: when this struct powerdomain * is active (source) - * - * Prevent pwrdm1 from automatically going inactive (and then to - * retention or off) if pwrdm2 is still active. Returns -EINVAL if - * presented with invalid powerdomain pointers or called on a machine - * that does not support software-configurable hardware sleep dependencies, - * -ENOENT if the specified dependency cannot be set in hardware, or - * 0 upon success. - */ -int pwrdm_add_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2) -{ - struct powerdomain *p; - - if (!cpu_is_omap34xx()) - return -EINVAL; - - if (!pwrdm1) - return -EINVAL; - - p = _pwrdm_deps_lookup(pwrdm2, pwrdm1->sleepdep_srcs); - if (IS_ERR(p)) { - pr_debug("powerdomain: hardware cannot set/clear sleep " - "dependency affecting %s from %s\n", pwrdm1->name, - pwrdm2->name); - return PTR_ERR(p); - } - - pr_debug("powerdomain: will prevent %s from sleeping if %s is active\n", - pwrdm1->name, pwrdm2->name); - - cm_set_mod_reg_bits((1 << pwrdm2->dep_bit), - pwrdm1->prcm_offs, OMAP3430_CM_SLEEPDEP); - - return 0; -} - -/** - * pwrdm_del_sleepdep - remove a sleep dependency from pwrdm2 to pwrdm1 - * @pwrdm1: prevent this struct powerdomain * from sleeping (dependent) - * @pwrdm2: when this struct powerdomain * is active (source) - * - * Allow pwrdm1 to automatically go inactive (and then to retention or - * off), independent of the activity state of pwrdm2. Returns -EINVAL - * if presented with invalid powerdomain pointers or called on a machine - * that does not support software-configurable hardware sleep dependencies, - * -ENOENT if the specified dependency cannot be cleared in hardware, or - * 0 upon success. - */ -int pwrdm_del_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2) -{ - struct powerdomain *p; - - if (!cpu_is_omap34xx()) - return -EINVAL; - - if (!pwrdm1) - return -EINVAL; - - p = _pwrdm_deps_lookup(pwrdm2, pwrdm1->sleepdep_srcs); - if (IS_ERR(p)) { - pr_debug("powerdomain: hardware cannot set/clear sleep " - "dependency affecting %s from %s\n", pwrdm1->name, - pwrdm2->name); - return PTR_ERR(p); - } - - pr_debug("powerdomain: will no longer prevent %s from sleeping if " - "%s is active\n", pwrdm1->name, pwrdm2->name); - - cm_clear_mod_reg_bits((1 << pwrdm2->dep_bit), - pwrdm1->prcm_offs, OMAP3430_CM_SLEEPDEP); - - return 0; -} - -/** - * pwrdm_read_sleepdep - read sleep dependency state from pwrdm2 to pwrdm1 - * @pwrdm1: prevent this struct powerdomain * from sleeping (dependent) - * @pwrdm2: when this struct powerdomain * is active (source) - * - * Return 1 if a hardware sleep dependency exists wherein pwrdm1 will - * not be allowed to automatically go inactive if pwrdm2 is active; - * 0 if pwrdm1's automatic power state inactivity transition is independent - * of pwrdm2's; -EINVAL if either powerdomain pointer is invalid or called - * on a machine that does not support software-configurable hardware sleep - * dependencies; or -ENOENT if the hardware is incapable. - * - * REVISIT: Currently this function only represents software-controllable - * sleep dependencies. Sleep dependencies fixed in hardware are not - * yet handled here. - */ -int pwrdm_read_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2) -{ - struct powerdomain *p; - - if (!cpu_is_omap34xx()) - return -EINVAL; - - if (!pwrdm1) - return -EINVAL; - - p = _pwrdm_deps_lookup(pwrdm2, pwrdm1->sleepdep_srcs); - if (IS_ERR(p)) { - pr_debug("powerdomain: hardware cannot set/clear sleep " - "dependency affecting %s from %s\n", pwrdm1->name, - pwrdm2->name); - return PTR_ERR(p); - } - - return prm_read_mod_bits_shift(pwrdm1->prcm_offs, OMAP3430_CM_SLEEPDEP, - (1 << pwrdm2->dep_bit)); -} - /** * 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) @@ -691,7 +423,7 @@ 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 @@ -710,7 +442,7 @@ int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst) prm_rmw_mod_reg_bits(OMAP_POWERSTATE_MASK, (pwrst << OMAP_POWERSTATE_SHIFT), - pwrdm->prcm_offs, PM_PWSTCTRL); + pwrdm->prcm_offs, pwrstctrl_reg_offs); return 0; } @@ -719,7 +451,7 @@ int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst) * 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. */ @@ -728,15 +460,15 @@ int pwrdm_read_next_pwrst(struct powerdomain *pwrdm) if (!pwrdm) return -EINVAL; - return prm_read_mod_bits_shift(pwrdm->prcm_offs, PM_PWSTCTRL, - OMAP_POWERSTATE_MASK); + return prm_read_mod_bits_shift(pwrdm->prcm_offs, + pwrstctrl_reg_offs, OMAP_POWERSTATE_MASK); } /** * 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. */ @@ -745,15 +477,15 @@ int pwrdm_read_pwrst(struct powerdomain *pwrdm) if (!pwrdm) return -EINVAL; - return prm_read_mod_bits_shift(pwrdm->prcm_offs, PM_PWSTST, - OMAP_POWERSTATEST_MASK); + return prm_read_mod_bits_shift(pwrdm->prcm_offs, + pwrstst_reg_offs, OMAP_POWERSTATEST_MASK); } /** * 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. */ @@ -771,11 +503,11 @@ int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm) * @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) { @@ -796,7 +528,7 @@ int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) */ prm_rmw_mod_reg_bits(OMAP3430_LOGICL1CACHERETSTATE, (pwrst << __ffs(OMAP3430_LOGICL1CACHERETSTATE)), - pwrdm->prcm_offs, PM_PWSTCTRL); + pwrdm->prcm_offs, pwrstctrl_reg_offs); return 0; } @@ -807,13 +539,14 @@ int pwrdm_set_logic_retst(struct powerdomain *pwrdm, 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 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) { @@ -839,16 +572,19 @@ int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) */ switch (bank) { case 0: - m = OMAP3430_SHAREDL1CACHEFLATONSTATE_MASK; + m = OMAP_MEM0_ONSTATE_MASK; break; case 1: - m = OMAP3430_L1FLATMEMONSTATE_MASK; + m = OMAP_MEM1_ONSTATE_MASK; break; case 2: - m = OMAP3430_SHAREDL2CACHEFLATONSTATE_MASK; + m = OMAP_MEM2_ONSTATE_MASK; break; case 3: - m = OMAP3430_L2FLATMEMONSTATE_MASK; + m = OMAP_MEM3_ONSTATE_MASK; + break; + case 4: + m = OMAP_MEM4_ONSTATE_MASK; break; default: WARN_ON(1); /* should never happen */ @@ -856,7 +592,7 @@ int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) } prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), - pwrdm->prcm_offs, PM_PWSTCTRL); + pwrdm->prcm_offs, pwrstctrl_reg_offs); return 0; } @@ -867,14 +603,15 @@ 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) { @@ -900,16 +637,19 @@ int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) */ switch (bank) { case 0: - m = OMAP3430_SHAREDL1CACHEFLATRETSTATE; + m = OMAP_MEM0_RETSTATE_MASK; break; case 1: - m = OMAP3430_L1FLATMEMRETSTATE; + m = OMAP_MEM1_RETSTATE_MASK; break; case 2: - m = OMAP3430_SHAREDL2CACHEFLATRETSTATE; + m = OMAP_MEM2_RETSTATE_MASK; break; case 3: - m = OMAP3430_L2FLATMEMRETSTATE; + m = OMAP_MEM3_RETSTATE_MASK; + break; + case 4: + m = OMAP_MEM4_RETSTATE_MASK; break; default: WARN_ON(1); /* should never happen */ @@ -917,7 +657,7 @@ int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) } prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs, - PM_PWSTCTRL); + pwrstctrl_reg_offs); return 0; } @@ -926,27 +666,27 @@ 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, PM_PWSTST, - OMAP3430_LOGICSTATEST); + return prm_read_mod_bits_shift(pwrdm->prcm_offs, + pwrstst_reg_offs, OMAP3430_LOGICSTATEST); } /** * 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) { @@ -964,12 +704,35 @@ int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm) } /** + * 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); +} + +/** * pwrdm_read_mem_pwrst - get current memory bank power state * @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. */ @@ -994,23 +757,27 @@ int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) */ switch (bank) { case 0: - m = OMAP3430_SHAREDL1CACHEFLATSTATEST_MASK; + m = OMAP_MEM0_STATEST_MASK; break; case 1: - m = OMAP3430_L1FLATMEMSTATEST_MASK; + m = OMAP_MEM1_STATEST_MASK; break; case 2: - m = OMAP3430_SHAREDL2CACHEFLATSTATEST_MASK; + m = OMAP_MEM2_STATEST_MASK; break; case 3: - m = OMAP3430_L2FLATMEMSTATEST_MASK; + m = OMAP_MEM3_STATEST_MASK; + break; + case 4: + m = OMAP_MEM4_STATEST_MASK; break; default: WARN_ON(1); /* should never happen */ return -EEXIST; } - return prm_read_mod_bits_shift(pwrdm->prcm_offs, PM_PWSTST, m); + return prm_read_mod_bits_shift(pwrdm->prcm_offs, + pwrstst_reg_offs, m); } /** @@ -1018,10 +785,11 @@ int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) * @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) { @@ -1065,13 +833,63 @@ 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) { @@ -1096,11 +914,11 @@ 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) { @@ -1114,7 +932,7 @@ int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm) pwrdm->name); prm_rmw_mod_reg_bits(0, 1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT, - pwrdm->prcm_offs, PM_PWSTCTRL); + pwrdm->prcm_offs, pwrstctrl_reg_offs); return 0; } @@ -1124,11 +942,11 @@ 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) { @@ -1142,7 +960,7 @@ int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm) pwrdm->name); prm_rmw_mod_reg_bits(1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT, 0, - pwrdm->prcm_offs, PM_PWSTCTRL); + pwrdm->prcm_offs, pwrstctrl_reg_offs); return 0; } @@ -1151,7 +969,7 @@ 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) @@ -1163,7 +981,7 @@ bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm) * 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 @@ -1183,10 +1001,10 @@ int pwrdm_wait_transition(struct powerdomain *pwrdm) */ /* XXX Is this udelay() value meaningful? */ - while ((prm_read_mod_reg(pwrdm->prcm_offs, PM_PWSTST) & + while ((prm_read_mod_reg(pwrdm->prcm_offs, pwrstst_reg_offs) & OMAP_INTRANSITION) && (c++ < PWRDM_TRANSITION_BAILOUT)) - udelay(1); + udelay(1); if (c > PWRDM_TRANSITION_BAILOUT) { printk(KERN_ERR "powerdomain: waited too long for " @@ -1213,12 +1031,6 @@ int pwrdm_clkdm_state_switch(struct clockdomain *clkdm) 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) { |