diff options
Diffstat (limited to 'arch/arm/mach-omap2/omap_hwmod.c')
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 483 |
1 files changed, 292 insertions, 191 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 5a30658444d..e282e35769f 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -116,7 +116,6 @@ * - Open Core Protocol Specification 2.2 * * To do: - * - pin mux handling * - handle IO mapping * - bus throughput & module latency measurement code * @@ -135,17 +134,21 @@ #include <linux/err.h> #include <linux/list.h> #include <linux/mutex.h> +#include <linux/spinlock.h> #include <plat/common.h> #include <plat/cpu.h> -#include <plat/clockdomain.h> -#include <plat/powerdomain.h> +#include "clockdomain.h" +#include "powerdomain.h" #include <plat/clock.h> #include <plat/omap_hwmod.h> #include <plat/prcm.h> -#include "cm.h" -#include "prm.h" +#include "cm2xxx_3xxx.h" +#include "cm44xx.h" +#include "prm2xxx_3xxx.h" +#include "prm44xx.h" +#include "mux.h" /* Maximum microseconds to wait for OMAP module to softreset */ #define MAX_MODULE_SOFTRESET_WAIT 10000 @@ -156,8 +159,6 @@ /* omap_hwmod_list contains all registered struct omap_hwmods */ static LIST_HEAD(omap_hwmod_list); -static DEFINE_MUTEX(omap_hwmod_mutex); - /* mpu_oh: used to add/remove MPU initiator from sleepdep list */ static struct omap_hwmod *mpu_oh; @@ -209,10 +210,9 @@ static void _write_sysconfig(u32 v, struct omap_hwmod *oh) /* XXX ensure module interface clock is up */ - if (oh->_sysc_cache != v) { - oh->_sysc_cache = v; - omap_hwmod_write(v, oh, oh->class->sysc->sysc_offs); - } + /* Module might have lost context, always update cache and register */ + oh->_sysc_cache = v; + omap_hwmod_write(v, oh, oh->class->sysc->sysc_offs); } /** @@ -388,12 +388,13 @@ static int _set_module_autoidle(struct omap_hwmod *oh, u8 autoidle, * Allow the hardware module @oh to send wakeups. Returns -EINVAL * upon error or 0 upon success. */ -static int _enable_wakeup(struct omap_hwmod *oh) +static int _enable_wakeup(struct omap_hwmod *oh, u32 *v) { - u32 v, wakeup_mask; + u32 wakeup_mask; if (!oh->class->sysc || - !(oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) + !((oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) || + (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP))) return -EINVAL; if (!oh->class->sysc->sysc_fields) { @@ -403,9 +404,10 @@ static int _enable_wakeup(struct omap_hwmod *oh) wakeup_mask = (0x1 << oh->class->sysc->sysc_fields->enwkup_shift); - v = oh->_sysc_cache; - v |= wakeup_mask; - _write_sysconfig(v, oh); + *v |= wakeup_mask; + + if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) + _set_slave_idlemode(oh, HWMOD_IDLEMODE_SMART_WKUP, v); /* XXX test pwrdm_get_wken for this hwmod's subsystem */ @@ -421,12 +423,13 @@ static int _enable_wakeup(struct omap_hwmod *oh) * Prevent the hardware module @oh to send wakeups. Returns -EINVAL * upon error or 0 upon success. */ -static int _disable_wakeup(struct omap_hwmod *oh) +static int _disable_wakeup(struct omap_hwmod *oh, u32 *v) { - u32 v, wakeup_mask; + u32 wakeup_mask; if (!oh->class->sysc || - !(oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) + !((oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) || + (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP))) return -EINVAL; if (!oh->class->sysc->sysc_fields) { @@ -436,9 +439,10 @@ static int _disable_wakeup(struct omap_hwmod *oh) wakeup_mask = (0x1 << oh->class->sysc->sysc_fields->enwkup_shift); - v = oh->_sysc_cache; - v &= ~wakeup_mask; - _write_sysconfig(v, oh); + *v &= ~wakeup_mask; + + if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) + _set_slave_idlemode(oh, HWMOD_IDLEMODE_SMART, v); /* XXX test pwrdm_get_wken for this hwmod's subsystem */ @@ -675,7 +679,7 @@ static void _disable_optional_clocks(struct omap_hwmod *oh) * Returns the array index of the OCP slave port that the MPU * addresses the device on, or -EINVAL upon error or not found. */ -static int _find_mpu_port_index(struct omap_hwmod *oh) +static int __init _find_mpu_port_index(struct omap_hwmod *oh) { int i; int found = 0; @@ -709,7 +713,7 @@ static int _find_mpu_port_index(struct omap_hwmod *oh) * Return the virtual address of the base of the register target of * device @oh, or NULL on error. */ -static void __iomem *_find_mpu_rt_base(struct omap_hwmod *oh, u8 index) +static void __iomem * __init _find_mpu_rt_base(struct omap_hwmod *oh, u8 index) { struct omap_hwmod_ocp_if *os; struct omap_hwmod_addr_space *mem; @@ -786,11 +790,11 @@ static void _enable_sysc(struct omap_hwmod *oh) (sf & SYSC_HAS_CLOCKACTIVITY)) _set_clockactivity(oh, oh->class->sysc->clockact, &v); - _write_sysconfig(v, oh); - /* If slave is in SMARTIDLE, also enable wakeup */ if ((sf & SYSC_HAS_SIDLEMODE) && !(oh->flags & HWMOD_SWSUP_SIDLE)) - _enable_wakeup(oh); + _enable_wakeup(oh, &v); + + _write_sysconfig(v, oh); /* * Set the autoidle bit only after setting the smartidle bit @@ -836,6 +840,10 @@ static void _idle_sysc(struct omap_hwmod *oh) _set_master_standbymode(oh, idlemode, &v); } + /* If slave is in SMARTIDLE, also enable wakeup */ + if ((sf & SYSC_HAS_SIDLEMODE) && !(oh->flags & HWMOD_SWSUP_SIDLE)) + _enable_wakeup(oh, &v); + _write_sysconfig(v, oh); } @@ -874,7 +882,6 @@ static void _shutdown_sysc(struct omap_hwmod *oh) * @name: find an omap_hwmod by name * * Return a pointer to an omap_hwmod by name, or NULL if not found. - * Caller must hold omap_hwmod_mutex. */ static struct omap_hwmod *_lookup(const char *name) { @@ -1089,7 +1096,7 @@ static int _read_hardreset(struct omap_hwmod *oh, const char *name) } /** - * _reset - reset an omap_hwmod + * _ocp_softreset - reset an omap_hwmod via the OCP_SYSCONFIG bit * @oh: struct omap_hwmod * * * Resets an omap_hwmod @oh via the OCP_SYSCONFIG bit. hwmod must be @@ -1098,12 +1105,13 @@ static int _read_hardreset(struct omap_hwmod *oh, const char *name) * the module did not reset in time, or 0 upon success. * * In OMAP3 a specific SYSSTATUS register is used to get the reset status. - * Starting in OMAP4, some IPs does not have SYSSTATUS register and instead + * Starting in OMAP4, some IPs do not have SYSSTATUS registers and instead * use the SYSCONFIG softreset bit to provide the status. * - * Note that some IP like McBSP does have a reset control but no reset status. + * Note that some IP like McBSP do have reset control but don't have + * reset status. */ -static int _reset(struct omap_hwmod *oh) +static int _ocp_softreset(struct omap_hwmod *oh) { u32 v; int c = 0; @@ -1124,7 +1132,7 @@ static int _reset(struct omap_hwmod *oh) if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET) _enable_optional_clocks(oh); - pr_debug("omap_hwmod: %s: resetting\n", oh->name); + pr_debug("omap_hwmod: %s: resetting via OCP SOFTRESET\n", oh->name); v = oh->_sysc_cache; ret = _set_softreset(oh, &v); @@ -1164,17 +1172,41 @@ dis_opt_clks: } /** - * _omap_hwmod_enable - enable an omap_hwmod + * _reset - reset an omap_hwmod + * @oh: struct omap_hwmod * + * + * Resets an omap_hwmod @oh. The default software reset mechanism for + * most OMAP IP blocks is triggered via the OCP_SYSCONFIG.SOFTRESET + * bit. However, some hwmods cannot be reset via this method: some + * are not targets and therefore have no OCP header registers to + * access; others (like the IVA) have idiosyncratic reset sequences. + * So for these relatively rare cases, custom reset code can be + * supplied in the struct omap_hwmod_class .reset function pointer. + * Passes along the return value from either _reset() or the custom + * reset function - these must return -EINVAL if the hwmod cannot be + * reset this way or if the hwmod is in the wrong state, -ETIMEDOUT if + * the module did not reset in time, or 0 upon success. + */ +static int _reset(struct omap_hwmod *oh) +{ + int ret; + + pr_debug("omap_hwmod: %s: resetting\n", oh->name); + + ret = (oh->class->reset) ? oh->class->reset(oh) : _ocp_softreset(oh); + + return ret; +} + +/** + * _enable - enable an omap_hwmod * @oh: struct omap_hwmod * * * Enables an omap_hwmod @oh such that the MPU can access the hwmod's - * register target. (This function has a full name -- - * _omap_hwmod_enable() rather than simply _enable() -- because it is - * currently required by the pm34xx.c idle loop.) Returns -EINVAL if - * the hwmod is in the wrong state or passes along the return value of - * _wait_target_ready(). + * register target. Returns -EINVAL if the hwmod is in the wrong + * state or passes along the return value of _wait_target_ready(). */ -int _omap_hwmod_enable(struct omap_hwmod *oh) +static int _enable(struct omap_hwmod *oh) { int r; @@ -1197,7 +1229,9 @@ int _omap_hwmod_enable(struct omap_hwmod *oh) oh->_state == _HWMOD_STATE_DISABLED) && oh->rst_lines_cnt == 1) _deassert_hardreset(oh, oh->rst_lines[0].name); - /* XXX mux balls */ + /* Mux pins for device runtime if populated */ + if (oh->mux) + omap_hwmod_mux(oh->mux, _HWMOD_STATE_ENABLED); _add_initiator_dep(oh, mpu_oh); _enable_clocks(oh); @@ -1213,6 +1247,7 @@ int _omap_hwmod_enable(struct omap_hwmod *oh) _enable_sysc(oh); } } else { + _disable_clocks(oh); pr_debug("omap_hwmod: %s: _wait_target_ready: %d\n", oh->name, r); } @@ -1221,16 +1256,14 @@ int _omap_hwmod_enable(struct omap_hwmod *oh) } /** - * _omap_hwmod_idle - idle an omap_hwmod + * _idle - idle an omap_hwmod * @oh: struct omap_hwmod * * * Idles an omap_hwmod @oh. This should be called once the hwmod has - * no further work. (This function has a full name -- - * _omap_hwmod_idle() rather than simply _idle() -- because it is - * currently required by the pm34xx.c idle loop.) Returns -EINVAL if - * the hwmod is in the wrong state or returns 0. + * no further work. Returns -EINVAL if the hwmod is in the wrong + * state or returns 0. */ -int _omap_hwmod_idle(struct omap_hwmod *oh) +static int _idle(struct omap_hwmod *oh) { if (oh->_state != _HWMOD_STATE_ENABLED) { WARN(1, "omap_hwmod: %s: idle state can only be entered from " @@ -1245,6 +1278,10 @@ int _omap_hwmod_idle(struct omap_hwmod *oh) _del_initiator_dep(oh, mpu_oh); _disable_clocks(oh); + /* Mux pins for device idle if populated */ + if (oh->mux) + omap_hwmod_mux(oh->mux, _HWMOD_STATE_IDLE); + oh->_state = _HWMOD_STATE_IDLE; return 0; @@ -1261,6 +1298,9 @@ int _omap_hwmod_idle(struct omap_hwmod *oh) */ static int _shutdown(struct omap_hwmod *oh) { + int ret; + u8 prev_state; + if (oh->_state != _HWMOD_STATE_IDLE && oh->_state != _HWMOD_STATE_ENABLED) { WARN(1, "omap_hwmod: %s: disabled state can only be entered " @@ -1270,6 +1310,18 @@ static int _shutdown(struct omap_hwmod *oh) pr_debug("omap_hwmod: %s: disabling\n", oh->name); + if (oh->class->pre_shutdown) { + prev_state = oh->_state; + if (oh->_state == _HWMOD_STATE_IDLE) + _enable(oh); + ret = oh->class->pre_shutdown(oh); + if (ret) { + if (prev_state == _HWMOD_STATE_IDLE) + _idle(oh); + return ret; + } + } + if (oh->class->sysc) _shutdown_sysc(oh); @@ -1288,7 +1340,9 @@ static int _shutdown(struct omap_hwmod *oh) } /* XXX Should this code also force-disable the optional clocks? */ - /* XXX mux any associated balls to safe mode */ + /* Mux pins to safe mode or use populated off mode values */ + if (oh->mux) + omap_hwmod_mux(oh->mux, _HWMOD_STATE_DISABLED); oh->_state = _HWMOD_STATE_DISABLED; @@ -1298,23 +1352,15 @@ static int _shutdown(struct omap_hwmod *oh) /** * _setup - do initial configuration of omap_hwmod * @oh: struct omap_hwmod * - * @skip_setup_idle_p: do not idle hwmods at the end of the fn if 1 * * Writes the CLOCKACTIVITY bits @clockact to the hwmod @oh - * OCP_SYSCONFIG register. @skip_setup_idle is intended to be used on - * a system that will not call omap_hwmod_enable() to enable devices - * (e.g., a system without PM runtime). Returns -EINVAL if the hwmod - * is in the wrong state or returns 0. + * OCP_SYSCONFIG register. Returns -EINVAL if the hwmod is in the + * wrong state or returns 0. */ static int _setup(struct omap_hwmod *oh, void *data) { int i, r; - u8 skip_setup_idle; - - if (!oh || !data) - return -EINVAL; - - skip_setup_idle = *(u8 *)data; + u8 postsetup_state; /* Set iclk autoidle mode */ if (oh->slaves_cnt > 0) { @@ -1334,7 +1380,6 @@ static int _setup(struct omap_hwmod *oh, void *data) } } - mutex_init(&oh->_mutex); oh->_state = _HWMOD_STATE_INITIALIZED; /* @@ -1347,7 +1392,7 @@ static int _setup(struct omap_hwmod *oh, void *data) if ((oh->flags & HWMOD_INIT_NO_RESET) && oh->rst_lines_cnt == 1) return 0; - r = _omap_hwmod_enable(oh); + r = _enable(oh); if (r) { pr_warning("omap_hwmod: %s: cannot be enabled (%d)\n", oh->name, oh->_state); @@ -1359,7 +1404,7 @@ static int _setup(struct omap_hwmod *oh, void *data) /* * OCP_SYSCONFIG bits need to be reprogrammed after a softreset. - * The _omap_hwmod_enable() function should be split to + * The _enable() function should be split to * avoid the rewrite of the OCP_SYSCONFIG register. */ if (oh->class->sysc) { @@ -1368,12 +1413,77 @@ static int _setup(struct omap_hwmod *oh, void *data) } } - if (!(oh->flags & HWMOD_INIT_NO_IDLE) && !skip_setup_idle) - _omap_hwmod_idle(oh); + postsetup_state = oh->_postsetup_state; + if (postsetup_state == _HWMOD_STATE_UNKNOWN) + postsetup_state = _HWMOD_STATE_ENABLED; + + /* + * XXX HWMOD_INIT_NO_IDLE does not belong in hwmod data - + * it should be set by the core code as a runtime flag during startup + */ + if ((oh->flags & HWMOD_INIT_NO_IDLE) && + (postsetup_state == _HWMOD_STATE_IDLE)) + postsetup_state = _HWMOD_STATE_ENABLED; + + if (postsetup_state == _HWMOD_STATE_IDLE) + _idle(oh); + else if (postsetup_state == _HWMOD_STATE_DISABLED) + _shutdown(oh); + else if (postsetup_state != _HWMOD_STATE_ENABLED) + WARN(1, "hwmod: %s: unknown postsetup state %d! defaulting to enabled\n", + oh->name, postsetup_state); return 0; } +/** + * _register - register a struct omap_hwmod + * @oh: struct omap_hwmod * + * + * Registers the omap_hwmod @oh. Returns -EEXIST if an omap_hwmod + * already has been registered by the same name; -EINVAL if the + * omap_hwmod is in the wrong state, if @oh is NULL, if the + * omap_hwmod's class field is NULL; if the omap_hwmod is missing a + * name, or if the omap_hwmod's class is missing a name; or 0 upon + * success. + * + * XXX The data should be copied into bootmem, so the original data + * should be marked __initdata and freed after init. This would allow + * unneeded omap_hwmods to be freed on multi-OMAP configurations. Note + * that the copy process would be relatively complex due to the large number + * of substructures. + */ +static int __init _register(struct omap_hwmod *oh) +{ + int ret, ms_id; + + if (!oh || !oh->name || !oh->class || !oh->class->name || + (oh->_state != _HWMOD_STATE_UNKNOWN)) + return -EINVAL; + + pr_debug("omap_hwmod: %s: registering\n", oh->name); + + if (_lookup(oh->name)) + return -EEXIST; + + ms_id = _find_mpu_port_index(oh); + if (!IS_ERR_VALUE(ms_id)) { + oh->_mpu_port_index = ms_id; + oh->_mpu_rt_va = _find_mpu_rt_base(oh, oh->_mpu_port_index); + } else { + oh->_int_flags |= _HWMOD_NO_MPU_PORT; + } + + list_add_tail(&oh->node, &omap_hwmod_list); + + spin_lock_init(&oh->_lock); + + oh->_state = _HWMOD_STATE_REGISTERED; + + ret = 0; + + return ret; +} /* Public functions */ @@ -1427,59 +1537,6 @@ int omap_hwmod_set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode) } /** - * omap_hwmod_register - register a struct omap_hwmod - * @oh: struct omap_hwmod * - * - * Registers the omap_hwmod @oh. Returns -EEXIST if an omap_hwmod - * already has been registered by the same name; -EINVAL if the - * omap_hwmod is in the wrong state, if @oh is NULL, if the - * omap_hwmod's class field is NULL; if the omap_hwmod is missing a - * name, or if the omap_hwmod's class is missing a name; or 0 upon - * success. - * - * XXX The data should be copied into bootmem, so the original data - * should be marked __initdata and freed after init. This would allow - * unneeded omap_hwmods to be freed on multi-OMAP configurations. Note - * that the copy process would be relatively complex due to the large number - * of substructures. - */ -int omap_hwmod_register(struct omap_hwmod *oh) -{ - int ret, ms_id; - - if (!oh || !oh->name || !oh->class || !oh->class->name || - (oh->_state != _HWMOD_STATE_UNKNOWN)) - return -EINVAL; - - mutex_lock(&omap_hwmod_mutex); - - pr_debug("omap_hwmod: %s: registering\n", oh->name); - - if (_lookup(oh->name)) { - ret = -EEXIST; - goto ohr_unlock; - } - - ms_id = _find_mpu_port_index(oh); - if (!IS_ERR_VALUE(ms_id)) { - oh->_mpu_port_index = ms_id; - oh->_mpu_rt_va = _find_mpu_rt_base(oh, oh->_mpu_port_index); - } else { - oh->_int_flags |= _HWMOD_NO_MPU_PORT; - } - - list_add_tail(&oh->node, &omap_hwmod_list); - - oh->_state = _HWMOD_STATE_REGISTERED; - - ret = 0; - -ohr_unlock: - mutex_unlock(&omap_hwmod_mutex); - return ret; -} - -/** * omap_hwmod_lookup - look up a registered omap_hwmod by name * @name: name of the omap_hwmod to look up * @@ -1493,9 +1550,7 @@ struct omap_hwmod *omap_hwmod_lookup(const char *name) if (!name) return NULL; - mutex_lock(&omap_hwmod_mutex); oh = _lookup(name); - mutex_unlock(&omap_hwmod_mutex); return oh; } @@ -1521,13 +1576,11 @@ int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh, void *data), if (!fn) return -EINVAL; - mutex_lock(&omap_hwmod_mutex); list_for_each_entry(temp_oh, &omap_hwmod_list, node) { ret = (*fn)(temp_oh, data); if (ret) break; } - mutex_unlock(&omap_hwmod_mutex); return ret; } @@ -1542,7 +1595,7 @@ int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh, void *data), * listed in @ohs that are valid for this chip. Returns -EINVAL if * omap_hwmod_init() has already been called or 0 otherwise. */ -int omap_hwmod_init(struct omap_hwmod **ohs) +int __init omap_hwmod_init(struct omap_hwmod **ohs) { struct omap_hwmod *oh; int r; @@ -1558,8 +1611,8 @@ int omap_hwmod_init(struct omap_hwmod **ohs) oh = *ohs; while (oh) { if (omap_chip_is(oh->omap_chip)) { - r = omap_hwmod_register(oh); - WARN(r, "omap_hwmod: %s: omap_hwmod_register returned " + r = _register(oh); + WARN(r, "omap_hwmod: %s: _register returned " "%d\n", oh->name, r); } oh = *++ohs; @@ -1570,13 +1623,12 @@ int omap_hwmod_init(struct omap_hwmod **ohs) /** * omap_hwmod_late_init - do some post-clock framework initialization - * @skip_setup_idle: if 1, do not idle hwmods in _setup() * * Must be called after omap2_clk_init(). Resolves the struct clk names * to struct clk pointers for each registered omap_hwmod. Also calls * _setup() on each hwmod. Returns 0. */ -int omap_hwmod_late_init(u8 skip_setup_idle) +int omap_hwmod_late_init(void) { int r; @@ -1588,36 +1640,7 @@ int omap_hwmod_late_init(u8 skip_setup_idle) WARN(!mpu_oh, "omap_hwmod: could not find MPU initiator hwmod %s\n", MPU_INITIATOR_NAME); - if (skip_setup_idle) - pr_debug("omap_hwmod: will leave hwmods enabled during setup\n"); - - omap_hwmod_for_each(_setup, &skip_setup_idle); - - return 0; -} - -/** - * omap_hwmod_unregister - unregister an omap_hwmod - * @oh: struct omap_hwmod * - * - * Unregisters a previously-registered omap_hwmod @oh. There's probably - * no use case for this, so it is likely to be removed in a later version. - * - * XXX Free all of the bootmem-allocated structures here when that is - * implemented. Make it clear that core code is the only code that is - * expected to unregister modules. - */ -int omap_hwmod_unregister(struct omap_hwmod *oh) -{ - if (!oh) - return -EINVAL; - - pr_debug("omap_hwmod: %s: unregistering\n", oh->name); - - mutex_lock(&omap_hwmod_mutex); - iounmap(oh->_mpu_rt_va); - list_del(&oh->node); - mutex_unlock(&omap_hwmod_mutex); + omap_hwmod_for_each(_setup, NULL); return 0; } @@ -1632,18 +1655,18 @@ int omap_hwmod_unregister(struct omap_hwmod *oh) int omap_hwmod_enable(struct omap_hwmod *oh) { int r; + unsigned long flags; if (!oh) return -EINVAL; - mutex_lock(&oh->_mutex); - r = _omap_hwmod_enable(oh); - mutex_unlock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); + r = _enable(oh); + spin_unlock_irqrestore(&oh->_lock, flags); return r; } - /** * omap_hwmod_idle - idle an omap_hwmod * @oh: struct omap_hwmod * @@ -1653,12 +1676,14 @@ int omap_hwmod_enable(struct omap_hwmod *oh) */ int omap_hwmod_idle(struct omap_hwmod *oh) { + unsigned long flags; + if (!oh) return -EINVAL; - mutex_lock(&oh->_mutex); - _omap_hwmod_idle(oh); - mutex_unlock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); + _idle(oh); + spin_unlock_irqrestore(&oh->_lock, flags); return 0; } @@ -1673,12 +1698,14 @@ int omap_hwmod_idle(struct omap_hwmod *oh) */ int omap_hwmod_shutdown(struct omap_hwmod *oh) { + unsigned long flags; + if (!oh) return -EINVAL; - mutex_lock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); _shutdown(oh); - mutex_unlock(&oh->_mutex); + spin_unlock_irqrestore(&oh->_lock, flags); return 0; } @@ -1691,9 +1718,11 @@ int omap_hwmod_shutdown(struct omap_hwmod *oh) */ int omap_hwmod_enable_clocks(struct omap_hwmod *oh) { - mutex_lock(&oh->_mutex); + unsigned long flags; + + spin_lock_irqsave(&oh->_lock, flags); _enable_clocks(oh); - mutex_unlock(&oh->_mutex); + spin_unlock_irqrestore(&oh->_lock, flags); return 0; } @@ -1706,9 +1735,11 @@ int omap_hwmod_enable_clocks(struct omap_hwmod *oh) */ int omap_hwmod_disable_clocks(struct omap_hwmod *oh) { - mutex_lock(&oh->_mutex); + unsigned long flags; + + spin_lock_irqsave(&oh->_lock, flags); _disable_clocks(oh); - mutex_unlock(&oh->_mutex); + spin_unlock_irqrestore(&oh->_lock, flags); return 0; } @@ -1752,13 +1783,14 @@ void omap_hwmod_ocp_barrier(struct omap_hwmod *oh) int omap_hwmod_reset(struct omap_hwmod *oh) { int r; + unsigned long flags; if (!oh) return -EINVAL; - mutex_lock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); r = _reset(oh); - mutex_unlock(&oh->_mutex); + spin_unlock_irqrestore(&oh->_lock, flags); return r; } @@ -1955,13 +1987,18 @@ int omap_hwmod_del_initiator_dep(struct omap_hwmod *oh, */ int omap_hwmod_enable_wakeup(struct omap_hwmod *oh) { + unsigned long flags; + u32 v; + if (!oh->class->sysc || !(oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) return -EINVAL; - mutex_lock(&oh->_mutex); - _enable_wakeup(oh); - mutex_unlock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); + v = oh->_sysc_cache; + _enable_wakeup(oh, &v); + _write_sysconfig(v, oh); + spin_unlock_irqrestore(&oh->_lock, flags); return 0; } @@ -1980,13 +2017,18 @@ int omap_hwmod_enable_wakeup(struct omap_hwmod *oh) */ int omap_hwmod_disable_wakeup(struct omap_hwmod *oh) { + unsigned long flags; + u32 v; + if (!oh->class->sysc || !(oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) return -EINVAL; - mutex_lock(&oh->_mutex); - _disable_wakeup(oh); - mutex_unlock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); + v = oh->_sysc_cache; + _disable_wakeup(oh, &v); + _write_sysconfig(v, oh); + spin_unlock_irqrestore(&oh->_lock, flags); return 0; } @@ -2006,13 +2048,14 @@ int omap_hwmod_disable_wakeup(struct omap_hwmod *oh) int omap_hwmod_assert_hardreset(struct omap_hwmod *oh, const char *name) { int ret; + unsigned long flags; if (!oh) return -EINVAL; - mutex_lock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); ret = _assert_hardreset(oh, name); - mutex_unlock(&oh->_mutex); + spin_unlock_irqrestore(&oh->_lock, flags); return ret; } @@ -2032,13 +2075,14 @@ int omap_hwmod_assert_hardreset(struct omap_hwmod *oh, const char *name) int omap_hwmod_deassert_hardreset(struct omap_hwmod *oh, const char *name) { int ret; + unsigned long flags; if (!oh) return -EINVAL; - mutex_lock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); ret = _deassert_hardreset(oh, name); - mutex_unlock(&oh->_mutex); + spin_unlock_irqrestore(&oh->_lock, flags); return ret; } @@ -2057,13 +2101,14 @@ int omap_hwmod_deassert_hardreset(struct omap_hwmod *oh, const char *name) int omap_hwmod_read_hardreset(struct omap_hwmod *oh, const char *name) { int ret; + unsigned long flags; if (!oh) return -EINVAL; - mutex_lock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); ret = _read_hardreset(oh, name); - mutex_unlock(&oh->_mutex); + spin_unlock_irqrestore(&oh->_lock, flags); return ret; } @@ -2075,9 +2120,8 @@ int omap_hwmod_read_hardreset(struct omap_hwmod *oh, const char *name) * @fn: callback function pointer to call for each hwmod in class @classname * @user: arbitrary context data to pass to the callback function * - * For each omap_hwmod of class @classname, call @fn. Takes - * omap_hwmod_mutex to prevent the hwmod list from changing during the - * iteration. If the callback function returns something other than + * For each omap_hwmod of class @classname, call @fn. + * If the callback function returns something other than * zero, the iterator is terminated, and the callback function's return * value is passed back to the caller. Returns 0 upon success, -EINVAL * if @classname or @fn are NULL, or passes back the error code from @fn. @@ -2096,8 +2140,6 @@ int omap_hwmod_for_each_by_class(const char *classname, pr_debug("omap_hwmod: %s: looking for modules of class %s\n", __func__, classname); - mutex_lock(&omap_hwmod_mutex); - list_for_each_entry(temp_oh, &omap_hwmod_list, node) { if (!strcmp(temp_oh->class->name, classname)) { pr_debug("omap_hwmod: %s: %s: calling callback fn\n", @@ -2108,8 +2150,6 @@ int omap_hwmod_for_each_by_class(const char *classname, } } - mutex_unlock(&omap_hwmod_mutex); - if (ret) pr_debug("omap_hwmod: %s: iterator terminated early: %d\n", __func__, ret); @@ -2117,3 +2157,64 @@ int omap_hwmod_for_each_by_class(const char *classname, return ret; } +/** + * omap_hwmod_set_postsetup_state - set the post-_setup() state for this hwmod + * @oh: struct omap_hwmod * + * @state: state that _setup() should leave the hwmod in + * + * Sets the hwmod state that @oh will enter at the end of _setup() (called by + * omap_hwmod_late_init()). Only valid to call between calls to + * omap_hwmod_init() and omap_hwmod_late_init(). Returns 0 upon success or + * -EINVAL if there is a problem with the arguments or if the hwmod is + * in the wrong state. + */ +int omap_hwmod_set_postsetup_state(struct omap_hwmod *oh, u8 state) +{ + int ret; + unsigned long flags; + + if (!oh) + return -EINVAL; + + if (state != _HWMOD_STATE_DISABLED && + state != _HWMOD_STATE_ENABLED && + state != _HWMOD_STATE_IDLE) + return -EINVAL; + + spin_lock_irqsave(&oh->_lock, flags); + + if (oh->_state != _HWMOD_STATE_REGISTERED) { + ret = -EINVAL; + goto ohsps_unlock; + } + + oh->_postsetup_state = state; + ret = 0; + +ohsps_unlock: + spin_unlock_irqrestore(&oh->_lock, flags); + + return ret; +} + +/** + * omap_hwmod_get_context_loss_count - get lost context count + * @oh: struct omap_hwmod * + * + * Query the powerdomain of of @oh to get the context loss + * count for this device. + * + * Returns the context loss count of the powerdomain assocated with @oh + * upon success, or zero if no powerdomain exists for @oh. + */ +u32 omap_hwmod_get_context_loss_count(struct omap_hwmod *oh) +{ + struct powerdomain *pwrdm; + int ret = 0; + + pwrdm = omap_hwmod_get_pwrdm(oh); + if (pwrdm) + ret = pwrdm_get_context_loss_count(pwrdm); + + return ret; +} |