diff options
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 55 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.h | 10 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/prm.h | 11 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/prm44xx.c | 33 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/prm_common.c | 45 |
5 files changed, 146 insertions, 8 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 68616b2b5b96..083adbed0bfd 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -187,6 +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 */ @@ -1983,6 +1985,42 @@ 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 * * @@ -2065,6 +2103,9 @@ 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) { @@ -3907,17 +3948,21 @@ 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); @@ -4032,6 +4077,8 @@ 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; diff --git a/arch/arm/mach-omap2/omap_hwmod.h b/arch/arm/mach-omap2/omap_hwmod.h index 87b59b45c678..421ff65562b0 100644 --- a/arch/arm/mach-omap2/omap_hwmod.h +++ b/arch/arm/mach-omap2/omap_hwmod.h @@ -2,7 +2,7 @@ * omap_hwmod macros, structures * * Copyright (C) 2009-2011 Nokia Corporation - * Copyright (C) 2012 Texas Instruments, Inc. + * Copyright (C) 2011-2012 Texas Instruments, Inc. * Paul Walmsley * * Created in collaboration with (alphabetical order): Benoît Cousson, @@ -394,12 +394,15 @@ struct omap_hwmod_omap2_prcm { /** * struct omap_hwmod_omap4_prcm - OMAP4-specific PRCM data - * @clkctrl_reg: PRCM address of the clock control register - * @rstctrl_reg: address of the XXX_RSTCTRL register located in the PRM + * @clkctrl_offs: offset of the PRCM clock control register + * @rstctrl_offs: offset of the XXX_RSTCTRL register located in the PRM + * @context_offs: offset of the RM_*_CONTEXT register * @lostcontext_mask: bitmask for selecting bits from RM_*_CONTEXT register * @rstst_reg: (AM33XX only) address of the XXX_RSTST register in the PRM * @submodule_wkdep_bit: bit shift of the WKDEP range * @flags: PRCM register capabilities for this IP block + * @modulemode: allowable modulemodes + * @context_lost_counter: Count of module level context lost * * If @lostcontext_mask is not defined, context loss check code uses * whole register without masking. @lostcontext_mask should only be @@ -415,6 +418,7 @@ struct omap_hwmod_omap4_prcm { u8 submodule_wkdep_bit; u8 modulemode; u8 flags; + int context_lost_counter; }; diff --git a/arch/arm/mach-omap2/prm.h b/arch/arm/mach-omap2/prm.h index a1a266ce90da..ac25ae6667cf 100644 --- a/arch/arm/mach-omap2/prm.h +++ b/arch/arm/mach-omap2/prm.h @@ -114,16 +114,25 @@ struct prm_reset_src_map { /** * struct prm_ll_data - fn ptrs to per-SoC PRM function implementations - * @read_reset_sources: ptr to the Soc PRM-specific get_reset_source impl + * @read_reset_sources: ptr to the SoC PRM-specific get_reset_source impl + * @was_any_context_lost_old: ptr to the SoC PRM context loss test fn + * @clear_context_loss_flags_old: ptr to the SoC PRM context loss flag clear fn + * + * XXX @was_any_context_lost_old and @clear_context_loss_flags_old are + * deprecated. */ struct prm_ll_data { u32 (*read_reset_sources)(void); + bool (*was_any_context_lost_old)(u8 part, s16 inst, u16 idx); + void (*clear_context_loss_flags_old)(u8 part, s16 inst, u16 idx); }; extern int prm_register(struct prm_ll_data *pld); extern int prm_unregister(struct prm_ll_data *pld); extern u32 prm_read_reset_sources(void); +extern bool prm_was_any_context_lost_old(u8 part, s16 inst, u16 idx); +extern void prm_clear_context_loss_flags_old(u8 part, s16 inst, u16 idx); #endif diff --git a/arch/arm/mach-omap2/prm44xx.c b/arch/arm/mach-omap2/prm44xx.c index 9db1bd279f8e..7498bc77fe8b 100644 --- a/arch/arm/mach-omap2/prm44xx.c +++ b/arch/arm/mach-omap2/prm44xx.c @@ -346,6 +346,37 @@ static u32 omap44xx_prm_read_reset_sources(void) return r; } +/** + * omap44xx_prm_was_any_context_lost_old - was module hardware context lost? + * @part: PRM partition ID (e.g., OMAP4430_PRM_PARTITION) + * @inst: PRM instance offset (e.g., OMAP4430_PRM_MPU_INST) + * @idx: CONTEXT register offset + * + * Return 1 if any bits were set in the *_CONTEXT_* register + * identified by (@part, @inst, @idx), which means that some context + * was lost for that module; otherwise, return 0. + */ +static bool omap44xx_prm_was_any_context_lost_old(u8 part, s16 inst, u16 idx) +{ + return (omap4_prminst_read_inst_reg(part, inst, idx)) ? 1 : 0; +} + +/** + * omap44xx_prm_clear_context_lost_flags_old - clear context loss flags + * @part: PRM partition ID (e.g., OMAP4430_PRM_PARTITION) + * @inst: PRM instance offset (e.g., OMAP4430_PRM_MPU_INST) + * @idx: CONTEXT register offset + * + * Clear hardware context loss bits for the module identified by + * (@part, @inst, @idx). No return value. XXX Writes to reserved bits; + * is there a way to avoid this? + */ +static void omap44xx_prm_clear_context_loss_flags_old(u8 part, s16 inst, + u16 idx) +{ + omap4_prminst_write_inst_reg(0xffffffff, part, inst, idx); +} + /* Powerdomain low-level functions */ static int omap4_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst) @@ -613,6 +644,8 @@ struct pwrdm_ops omap4_pwrdm_operations = { */ static struct prm_ll_data omap44xx_prm_ll_data = { .read_reset_sources = &omap44xx_prm_read_reset_sources, + .was_any_context_lost_old = &omap44xx_prm_was_any_context_lost_old, + .clear_context_loss_flags_old = &omap44xx_prm_clear_context_loss_flags_old, }; int __init omap44xx_prm_init(void) diff --git a/arch/arm/mach-omap2/prm_common.c b/arch/arm/mach-omap2/prm_common.c index d2e0798a4c82..c6ae53ca8224 100644 --- a/arch/arm/mach-omap2/prm_common.c +++ b/arch/arm/mach-omap2/prm_common.c @@ -367,6 +367,51 @@ u32 prm_read_reset_sources(void) } /** + * prm_was_any_context_lost_old - was device context lost? (old API) + * @part: PRM partition ID (e.g., OMAP4430_PRM_PARTITION) + * @inst: PRM instance offset (e.g., OMAP4430_PRM_MPU_INST) + * @idx: CONTEXT register offset + * + * Return 1 if any bits were set in the *_CONTEXT_* register + * identified by (@part, @inst, @idx), which means that some context + * was lost for that module; otherwise, return 0. XXX Deprecated; + * callers need to use a less-SoC-dependent way to identify hardware + * IP blocks. + */ +bool prm_was_any_context_lost_old(u8 part, s16 inst, u16 idx) +{ + bool ret = true; + + if (prm_ll_data->was_any_context_lost_old) + ret = prm_ll_data->was_any_context_lost_old(part, inst, idx); + else + WARN_ONCE(1, "prm: %s: no mapping function defined\n", + __func__); + + return ret; +} + +/** + * prm_clear_context_lost_flags_old - clear context loss flags (old API) + * @part: PRM partition ID (e.g., OMAP4430_PRM_PARTITION) + * @inst: PRM instance offset (e.g., OMAP4430_PRM_MPU_INST) + * @idx: CONTEXT register offset + * + * Clear hardware context loss bits for the module identified by + * (@part, @inst, @idx). No return value. XXX Deprecated; callers + * need to use a less-SoC-dependent way to identify hardware IP + * blocks. + */ +void prm_clear_context_loss_flags_old(u8 part, s16 inst, u16 idx) +{ + if (prm_ll_data->clear_context_loss_flags_old) + prm_ll_data->clear_context_loss_flags_old(part, inst, idx); + else + WARN_ONCE(1, "prm: %s: no mapping function defined\n", + __func__); +} + +/** * prm_register - register per-SoC low-level data with the PRM * @pld: low-level per-SoC OMAP PRM data & function pointers to register * |