diff options
Diffstat (limited to 'arch/arm/mach-omap2/omap_hwmod.c')
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 208 |
1 files changed, 160 insertions, 48 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 87cc6d058de2..4653efb87a27 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -130,7 +130,7 @@ #include <linux/kernel.h> #include <linux/errno.h> #include <linux/io.h> -#include <linux/clk.h> +#include <linux/clk-provider.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/list.h> @@ -139,27 +139,25 @@ #include <linux/slab.h> #include <linux/bootmem.h> -#include <plat/clock.h> -#include <plat/omap_hwmod.h> -#include <plat/prcm.h> +#include "clock.h" +#include "omap_hwmod.h" #include "soc.h" #include "common.h" #include "clockdomain.h" #include "powerdomain.h" -#include "cm2xxx_3xxx.h" +#include "cm2xxx.h" +#include "cm3xxx.h" #include "cminst44xx.h" #include "cm33xx.h" -#include "prm2xxx_3xxx.h" +#include "prm.h" +#include "prm3xxx.h" #include "prm44xx.h" #include "prm33xx.h" #include "prminst44xx.h" #include "mux.h" #include "pm.h" -/* Maximum microseconds to wait for OMAP module to softreset */ -#define MAX_MODULE_SOFTRESET_WAIT 10000 - /* Name of the OMAP hwmod for the MPU */ #define MPU_INITIATOR_NAME "mpu" @@ -189,6 +187,8 @@ struct omap_hwmod_soc_ops { int (*is_hardreset_asserted)(struct omap_hwmod *oh, struct omap_hwmod_rst_info *ohri); int (*init_clkdm)(struct omap_hwmod *oh); + void (*update_context_lost)(struct omap_hwmod *oh); + int (*get_context_lost)(struct omap_hwmod *oh); }; /* soc_ops: adapts the omap_hwmod code to the currently-booted SoC */ @@ -648,6 +648,19 @@ static int _disable_wakeup(struct omap_hwmod *oh, u32 *v) return 0; } +static struct clockdomain *_get_clkdm(struct omap_hwmod *oh) +{ + struct clk_hw_omap *clk; + + if (oh->clkdm) { + return oh->clkdm; + } else if (oh->_clk) { + clk = to_clk_hw_omap(__clk_get_hw(oh->_clk)); + return clk->clkdm; + } + return NULL; +} + /** * _add_initiator_dep: prevent @oh from smart-idling while @init_oh is active * @oh: struct omap_hwmod * @@ -663,13 +676,18 @@ static int _disable_wakeup(struct omap_hwmod *oh, u32 *v) */ static int _add_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh) { - if (!oh->_clk) + struct clockdomain *clkdm, *init_clkdm; + + clkdm = _get_clkdm(oh); + init_clkdm = _get_clkdm(init_oh); + + if (!clkdm || !init_clkdm) return -EINVAL; - if (oh->_clk->clkdm && oh->_clk->clkdm->flags & CLKDM_NO_AUTODEPS) + if (clkdm && clkdm->flags & CLKDM_NO_AUTODEPS) return 0; - return clkdm_add_sleepdep(oh->_clk->clkdm, init_oh->_clk->clkdm); + return clkdm_add_sleepdep(clkdm, init_clkdm); } /** @@ -687,13 +705,18 @@ static int _add_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh) */ static int _del_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh) { - if (!oh->_clk) + struct clockdomain *clkdm, *init_clkdm; + + clkdm = _get_clkdm(oh); + init_clkdm = _get_clkdm(init_oh); + + if (!clkdm || !init_clkdm) return -EINVAL; - if (oh->_clk->clkdm && oh->_clk->clkdm->flags & CLKDM_NO_AUTODEPS) + if (clkdm && clkdm->flags & CLKDM_NO_AUTODEPS) return 0; - return clkdm_del_sleepdep(oh->_clk->clkdm, init_oh->_clk->clkdm); + return clkdm_del_sleepdep(clkdm, init_clkdm); } /** @@ -727,7 +750,7 @@ static int _init_main_clk(struct omap_hwmod *oh) */ clk_prepare(oh->_clk); - if (!oh->_clk->clkdm) + if (!_get_clkdm(oh)) pr_debug("omap_hwmod: %s: missing clockdomain for %s.\n", oh->name, oh->main_clk); @@ -1310,6 +1333,7 @@ static void _enable_sysc(struct omap_hwmod *oh) u8 idlemode, sf; u32 v; bool clkdm_act; + struct clockdomain *clkdm; if (!oh->class->sysc) return; @@ -1329,11 +1353,9 @@ static void _enable_sysc(struct omap_hwmod *oh) v = oh->_sysc_cache; sf = oh->class->sysc->sysc_flags; + clkdm = _get_clkdm(oh); if (sf & SYSC_HAS_SIDLEMODE) { - clkdm_act = ((oh->clkdm && - oh->clkdm->flags & CLKDM_ACTIVE_WITH_MPU) || - (oh->_clk && oh->_clk->clkdm && - oh->_clk->clkdm->flags & CLKDM_ACTIVE_WITH_MPU)); + clkdm_act = (clkdm && clkdm->flags & CLKDM_ACTIVE_WITH_MPU); if (clkdm_act && !(oh->class->sysc->idlemodes & (SIDLE_SMART | SIDLE_SMART_WKUP))) idlemode = HWMOD_IDLEMODE_FORCE; @@ -1535,11 +1557,12 @@ static int _init_clocks(struct omap_hwmod *oh, void *data) pr_debug("omap_hwmod: %s: looking up clocks\n", oh->name); + if (soc_ops.init_clkdm) + ret |= soc_ops.init_clkdm(oh); + ret |= _init_main_clk(oh); ret |= _init_interface_clks(oh); ret |= _init_opt_clks(oh); - if (soc_ops.init_clkdm) - ret |= soc_ops.init_clkdm(oh); if (!ret) oh->_state = _HWMOD_STATE_CLKS_INITED; @@ -1994,6 +2017,42 @@ static void _reconfigure_io_chain(void) } /** + * _omap4_update_context_lost - increment hwmod context loss counter if + * hwmod context was lost, and clear hardware context loss reg + * @oh: hwmod to check for context loss + * + * If the PRCM indicates that the hwmod @oh lost context, increment + * our in-memory context loss counter, and clear the RM_*_CONTEXT + * bits. No return value. + */ +static void _omap4_update_context_lost(struct omap_hwmod *oh) +{ + if (oh->prcm.omap4.flags & HWMOD_OMAP4_NO_CONTEXT_LOSS_BIT) + return; + + if (!prm_was_any_context_lost_old(oh->clkdm->pwrdm.ptr->prcm_partition, + oh->clkdm->pwrdm.ptr->prcm_offs, + oh->prcm.omap4.context_offs)) + return; + + oh->prcm.omap4.context_lost_counter++; + prm_clear_context_loss_flags_old(oh->clkdm->pwrdm.ptr->prcm_partition, + oh->clkdm->pwrdm.ptr->prcm_offs, + oh->prcm.omap4.context_offs); +} + +/** + * _omap4_get_context_lost - get context loss counter for a hwmod + * @oh: hwmod to get context loss counter for + * + * Returns the in-memory context loss counter for a hwmod. + */ +static int _omap4_get_context_lost(struct omap_hwmod *oh) +{ + return oh->prcm.omap4.context_lost_counter; +} + +/** * _enable - enable an omap_hwmod * @oh: struct omap_hwmod * * @@ -2076,6 +2135,9 @@ static int _enable(struct omap_hwmod *oh) if (soc_ops.enable_module) soc_ops.enable_module(oh); + if (soc_ops.update_context_lost) + soc_ops.update_context_lost(oh); + r = (soc_ops.wait_target_ready) ? soc_ops.wait_target_ready(oh) : -EINVAL; if (!r) { @@ -2095,7 +2157,8 @@ static int _enable(struct omap_hwmod *oh) _enable_sysc(oh); } } else { - _omap4_disable_module(oh); + if (soc_ops.disable_module) + soc_ops.disable_module(oh); _disable_clocks(oh); pr_debug("omap_hwmod: %s: _wait_target_ready: %d\n", oh->name, r); @@ -2703,7 +2766,7 @@ static int __init _alloc_linkspace(struct omap_hwmod_ocp_if **ois) /* Static functions intended only for use in soc_ops field function pointers */ /** - * _omap2_wait_target_ready - wait for a module to leave slave idle + * _omap2xxx_wait_target_ready - wait for a module to leave slave idle * @oh: struct omap_hwmod * * * Wait for a module @oh to leave slave idle. Returns 0 if the module @@ -2711,7 +2774,7 @@ static int __init _alloc_linkspace(struct omap_hwmod_ocp_if **ois) * slave idle; otherwise, pass along the return value of the * appropriate *_cm*_wait_module_ready() function. */ -static int _omap2_wait_target_ready(struct omap_hwmod *oh) +static int _omap2xxx_wait_target_ready(struct omap_hwmod *oh) { if (!oh) return -EINVAL; @@ -2724,9 +2787,36 @@ static int _omap2_wait_target_ready(struct omap_hwmod *oh) /* XXX check module SIDLEMODE, hardreset status, enabled clocks */ - return omap2_cm_wait_module_ready(oh->prcm.omap2.module_offs, - oh->prcm.omap2.idlest_reg_id, - oh->prcm.omap2.idlest_idle_bit); + return omap2xxx_cm_wait_module_ready(oh->prcm.omap2.module_offs, + oh->prcm.omap2.idlest_reg_id, + oh->prcm.omap2.idlest_idle_bit); +} + +/** + * _omap3xxx_wait_target_ready - wait for a module to leave slave idle + * @oh: struct omap_hwmod * + * + * Wait for a module @oh to leave slave idle. Returns 0 if the module + * does not have an IDLEST bit or if the module successfully leaves + * slave idle; otherwise, pass along the return value of the + * appropriate *_cm*_wait_module_ready() function. + */ +static int _omap3xxx_wait_target_ready(struct omap_hwmod *oh) +{ + if (!oh) + return -EINVAL; + + if (oh->flags & HWMOD_NO_IDLEST) + return 0; + + if (!_find_mpu_rt_port(oh)) + return 0; + + /* XXX check module SIDLEMODE, hardreset status, enabled clocks */ + + return omap3xxx_cm_wait_module_ready(oh->prcm.omap2.module_offs, + oh->prcm.omap2.idlest_reg_id, + oh->prcm.omap2.idlest_idle_bit); } /** @@ -3372,7 +3462,7 @@ int omap_hwmod_reset(struct omap_hwmod *oh) /** * omap_hwmod_count_resources - count number of struct resources needed by hwmod * @oh: struct omap_hwmod * - * @res: pointer to the first element of an array of struct resource to fill + * @flags: Type of resources to include when counting (IRQ/DMA/MEM) * * Count the number of struct resource array elements necessary to * contain omap_hwmod @oh resources. Intended to be called by code @@ -3385,20 +3475,25 @@ int omap_hwmod_reset(struct omap_hwmod *oh) * resource IDs. * */ -int omap_hwmod_count_resources(struct omap_hwmod *oh) +int omap_hwmod_count_resources(struct omap_hwmod *oh, unsigned long flags) { - struct omap_hwmod_ocp_if *os; - struct list_head *p; - int ret; - int i = 0; + int ret = 0; - ret = _count_mpu_irqs(oh) + _count_sdma_reqs(oh); + if (flags & IORESOURCE_IRQ) + ret += _count_mpu_irqs(oh); - p = oh->slave_ports.next; + if (flags & IORESOURCE_DMA) + ret += _count_sdma_reqs(oh); - while (i < oh->slaves_cnt) { - os = _fetch_next_ocp_if(&p, &i); - ret += _count_ocp_if_addr_spaces(os); + if (flags & IORESOURCE_MEM) { + int i = 0; + struct omap_hwmod_ocp_if *os; + struct list_head *p = oh->slave_ports.next; + + while (i < oh->slaves_cnt) { + os = _fetch_next_ocp_if(&p, &i); + ret += _count_ocp_if_addr_spaces(os); + } } return ret; @@ -3565,10 +3660,15 @@ struct powerdomain *omap_hwmod_get_pwrdm(struct omap_hwmod *oh) { struct clk *c; struct omap_hwmod_ocp_if *oi; + struct clockdomain *clkdm; + struct clk_hw_omap *clk; if (!oh) return NULL; + if (oh->clkdm) + return oh->clkdm->pwrdm.ptr; + if (oh->_clk) { c = oh->_clk; } else { @@ -3578,11 +3678,12 @@ struct powerdomain *omap_hwmod_get_pwrdm(struct omap_hwmod *oh) c = oi->_clk; } - if (!c->clkdm) + clk = to_clk_hw_omap(__clk_get_hw(c)); + clkdm = clk->clkdm; + if (!clkdm) return NULL; - return c->clkdm->pwrdm.ptr; - + return clkdm->pwrdm.ptr; } /** @@ -3887,17 +3988,21 @@ ohsps_unlock: * 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 associated @oh + * upon success, or zero if no context loss data is available. * - * Returns the context loss count of the powerdomain assocated with @oh - * upon success, or zero if no powerdomain exists for @oh. + * On OMAP4, this queries the per-hwmod context loss register, + * assuming one exists. If not, or on OMAP2/3, this queries the + * enclosing powerdomain context loss count. */ int omap_hwmod_get_context_loss_count(struct omap_hwmod *oh) { struct powerdomain *pwrdm; int ret = 0; + if (soc_ops.get_context_lost) + return soc_ops.get_context_lost(oh); + pwrdm = omap_hwmod_get_pwrdm(oh); if (pwrdm) ret = pwrdm_get_context_loss_count(pwrdm); @@ -3994,8 +4099,13 @@ int omap_hwmod_pad_route_irq(struct omap_hwmod *oh, int pad_idx, int irq_idx) */ void __init omap_hwmod_init(void) { - if (cpu_is_omap24xx() || cpu_is_omap34xx()) { - soc_ops.wait_target_ready = _omap2_wait_target_ready; + if (cpu_is_omap24xx()) { + soc_ops.wait_target_ready = _omap2xxx_wait_target_ready; + soc_ops.assert_hardreset = _omap2_assert_hardreset; + soc_ops.deassert_hardreset = _omap2_deassert_hardreset; + soc_ops.is_hardreset_asserted = _omap2_is_hardreset_asserted; + } else if (cpu_is_omap34xx()) { + soc_ops.wait_target_ready = _omap3xxx_wait_target_ready; soc_ops.assert_hardreset = _omap2_assert_hardreset; soc_ops.deassert_hardreset = _omap2_deassert_hardreset; soc_ops.is_hardreset_asserted = _omap2_is_hardreset_asserted; @@ -4007,6 +4117,8 @@ void __init omap_hwmod_init(void) soc_ops.deassert_hardreset = _omap4_deassert_hardreset; soc_ops.is_hardreset_asserted = _omap4_is_hardreset_asserted; soc_ops.init_clkdm = _init_clkdm; + soc_ops.update_context_lost = _omap4_update_context_lost; + soc_ops.get_context_lost = _omap4_get_context_lost; } else if (soc_is_am33xx()) { soc_ops.enable_module = _am33xx_enable_module; soc_ops.disable_module = _am33xx_disable_module; |