@@ -195,6 +195,13 @@ static struct omap_hwmod_soc_ops soc_ops;
/* omap_hwmod_list contains all registered struct omap_hwmods */
static LIST_HEAD(omap_hwmod_list);
+struct hwmod_ops {
+ void (*hwmod_update_context_lost)(struct omap_hwmod *oh);
+ int (*hwmod_get_context_lost)(struct omap_hwmod *oh);
+};
+
+static struct hwmod_ops *arch_hwmod;
+
/* mpu_oh: used to add/remove MPU initiator from sleepdep list */
static struct omap_hwmod *mpu_oh;
@@ -1789,6 +1796,52 @@ 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)
+{
+ u32 r;
+
+ if (oh->prcm.omap4.flags & HWMOD_OMAP4_NO_CONTEXT_LOSS_BIT)
+ return;
+
+ r = omap4_prminst_read_inst_reg(oh->clkdm->pwrdm.ptr->prcm_partition,
+ oh->clkdm->pwrdm.ptr->prcm_offs,
+ oh->prcm.omap4.context_offs);
+
+ if (!r)
+ return;
+
+ oh->prcm.omap4.context_lost_counter++;
+
+ omap4_prminst_write_inst_reg(r, 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;
+}
+
+static struct hwmod_ops omap4_hwmod_ops = {
+ .hwmod_update_context_lost = _omap4_update_context_lost,
+ .hwmod_get_context_lost = _omap4_get_context_lost,
+};
+
+/**
* _enable - enable an omap_hwmod
* @oh: struct omap_hwmod *
*
@@ -1870,6 +1923,9 @@ static int _enable(struct omap_hwmod *oh)
if (soc_ops.enable_module)
soc_ops.enable_module(oh);
+ if (arch_hwmod && arch_hwmod->hwmod_update_context_lost)
+ arch_hwmod->hwmod_update_context_lost(oh);
+
r = (soc_ops.wait_target_ready) ? soc_ops.wait_target_ready(oh) :
-EINVAL;
if (!r) {
@@ -2903,6 +2959,9 @@ int __init omap_hwmod_setup_one(const char *oh_name)
*/
static int __init omap_hwmod_setup_all(void)
{
+ if (cpu_is_omap44xx())
+ arch_hwmod = &omap4_hwmod_ops;
+
_ensure_mpu_hwmod_is_setup(NULL);
omap_hwmod_for_each(_init, NULL);
@@ -3557,17 +3616,21 @@ 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 (arch_hwmod && arch_hwmod->hwmod_get_context_lost)
+ return arch_hwmod->hwmod_get_context_lost(oh);
+
pwrdm = omap_hwmod_get_pwrdm(oh);
if (pwrdm)
ret = pwrdm_get_context_loss_count(pwrdm);
@@ -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,
@@ -392,14 +392,16 @@ struct omap_hwmod_omap2_prcm {
* flag bit should be set in those cases
*/
#define HWMOD_OMAP4_NO_CONTEXT_LOSS_BIT (1 << 0)
-
/**
* 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
* @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
*/
struct omap_hwmod_omap4_prcm {
u16 clkctrl_offs;
@@ -409,6 +411,7 @@ struct omap_hwmod_omap4_prcm {
u8 submodule_wkdep_bit;
u8 modulemode;
u8 flags;
+ unsigned context_lost_counter;
};