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Diffstat (limited to 'arch/arm/mach-omap2/mux.c')
-rw-r--r--arch/arm/mach-omap2/mux.c111
1 files changed, 98 insertions, 13 deletions
diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c
index 655e9480eb9..fb8bc9fa43b 100644
--- a/arch/arm/mach-omap2/mux.c
+++ b/arch/arm/mach-omap2/mux.c
@@ -32,6 +32,8 @@
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/uaccess.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
#include <asm/system.h>
@@ -39,6 +41,7 @@
#include "control.h"
#include "mux.h"
+#include "prm.h"
#define OMAP_MUX_BASE_OFFSET 0x30 /* Offset from CTRL_BASE */
#define OMAP_MUX_BASE_SZ 0x5ca
@@ -97,8 +100,8 @@ void omap_mux_write_array(struct omap_mux_partition *partition,
static char *omap_mux_options;
-static int __init _omap_mux_init_gpio(struct omap_mux_partition *partition,
- int gpio, int val)
+static int _omap_mux_init_gpio(struct omap_mux_partition *partition,
+ int gpio, int val)
{
struct omap_mux_entry *e;
struct omap_mux *gpio_mux = NULL;
@@ -142,7 +145,7 @@ static int __init _omap_mux_init_gpio(struct omap_mux_partition *partition,
return 0;
}
-int __init omap_mux_init_gpio(int gpio, int val)
+int omap_mux_init_gpio(int gpio, int val)
{
struct omap_mux_partition *partition;
int ret;
@@ -156,9 +159,9 @@ int __init omap_mux_init_gpio(int gpio, int val)
return -ENODEV;
}
-static int __init _omap_mux_get_by_name(struct omap_mux_partition *partition,
- const char *muxname,
- struct omap_mux **found_mux)
+static int _omap_mux_get_by_name(struct omap_mux_partition *partition,
+ const char *muxname,
+ struct omap_mux **found_mux)
{
struct omap_mux *mux = NULL;
struct omap_mux_entry *e;
@@ -237,7 +240,7 @@ omap_mux_get_by_name(const char *muxname,
return -ENODEV;
}
-int __init omap_mux_init_signal(const char *muxname, int val)
+int omap_mux_init_signal(const char *muxname, int val)
{
struct omap_mux_partition *partition = NULL;
struct omap_mux *mux = NULL;
@@ -306,7 +309,8 @@ omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads)
pad->idle = bpad->idle;
pad->off = bpad->off;
- if (pad->flags & OMAP_DEVICE_PAD_REMUX)
+ if (pad->flags &
+ (OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP))
nr_pads_dynamic++;
pr_debug("%s: Initialized %s\n", __func__, pad->name);
@@ -331,7 +335,8 @@ omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads)
for (i = 0; i < hmux->nr_pads; i++) {
struct omap_device_pad *pad = &hmux->pads[i];
- if (pad->flags & OMAP_DEVICE_PAD_REMUX) {
+ if (pad->flags &
+ (OMAP_DEVICE_PAD_REMUX | OMAP_DEVICE_PAD_WAKEUP)) {
pr_debug("%s: pad %s tagged dynamic\n",
__func__, pad->name);
hmux->pads_dynamic[nr_pads_dynamic] = pad;
@@ -351,6 +356,78 @@ err1:
return NULL;
}
+/**
+ * omap_hwmod_mux_scan_wakeups - omap hwmod scan wakeup pads
+ * @hmux: Pads for a hwmod
+ * @mpu_irqs: MPU irq array for a hwmod
+ *
+ * Scans the wakeup status of pads for a single hwmod. If an irq
+ * array is defined for this mux, the parser will call the registered
+ * ISRs for corresponding pads, otherwise the parser will stop at the
+ * first wakeup active pad and return. Returns true if there is a
+ * pending and non-served wakeup event for the mux, otherwise false.
+ */
+static bool omap_hwmod_mux_scan_wakeups(struct omap_hwmod_mux_info *hmux,
+ struct omap_hwmod_irq_info *mpu_irqs)
+{
+ int i, irq;
+ unsigned int val;
+ u32 handled_irqs = 0;
+
+ for (i = 0; i < hmux->nr_pads_dynamic; i++) {
+ struct omap_device_pad *pad = hmux->pads_dynamic[i];
+
+ if (!(pad->flags & OMAP_DEVICE_PAD_WAKEUP) ||
+ !(pad->idle & OMAP_WAKEUP_EN))
+ continue;
+
+ val = omap_mux_read(pad->partition, pad->mux->reg_offset);
+ if (!(val & OMAP_WAKEUP_EVENT))
+ continue;
+
+ if (!hmux->irqs)
+ return true;
+
+ irq = hmux->irqs[i];
+ /* make sure we only handle each irq once */
+ if (handled_irqs & 1 << irq)
+ continue;
+
+ handled_irqs |= 1 << irq;
+
+ generic_handle_irq(mpu_irqs[irq].irq);
+ }
+
+ return false;
+}
+
+/**
+ * _omap_hwmod_mux_handle_irq - Process wakeup events for a single hwmod
+ *
+ * Checks a single hwmod for every wakeup capable pad to see if there is an
+ * active wakeup event. If this is the case, call the corresponding ISR.
+ */
+static int _omap_hwmod_mux_handle_irq(struct omap_hwmod *oh, void *data)
+{
+ if (!oh->mux || !oh->mux->enabled)
+ return 0;
+ if (omap_hwmod_mux_scan_wakeups(oh->mux, oh->mpu_irqs))
+ generic_handle_irq(oh->mpu_irqs[0].irq);
+ return 0;
+}
+
+/**
+ * omap_hwmod_mux_handle_irq - Process pad wakeup irqs.
+ *
+ * Calls a function for each registered omap_hwmod to check
+ * pad wakeup statuses.
+ */
+static irqreturn_t omap_hwmod_mux_handle_irq(int irq, void *unused)
+{
+ omap_hwmod_for_each(_omap_hwmod_mux_handle_irq, NULL);
+ return IRQ_HANDLED;
+}
+
/* Assumes the calling function takes care of locking */
void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state)
{
@@ -715,6 +792,7 @@ static void __init omap_mux_free_names(struct omap_mux *m)
static int __init omap_mux_late_init(void)
{
struct omap_mux_partition *partition;
+ int ret;
list_for_each_entry(partition, &mux_partitions, node) {
struct omap_mux_entry *e, *tmp;
@@ -735,6 +813,13 @@ static int __init omap_mux_late_init(void)
}
}
+ ret = request_irq(omap_prcm_event_to_irq("io"),
+ omap_hwmod_mux_handle_irq, IRQF_SHARED | IRQF_NO_SUSPEND,
+ "hwmod_io", omap_mux_late_init);
+
+ if (ret)
+ pr_warning("mux: Failed to setup hwmod io irq %d\n", ret);
+
omap_mux_dbg_init();
return 0;
@@ -1009,8 +1094,8 @@ static void omap_mux_init_package(struct omap_mux *superset,
omap_mux_package_init_balls(package_balls, superset);
}
-static void omap_mux_init_signals(struct omap_mux_partition *partition,
- struct omap_board_mux *board_mux)
+static void __init omap_mux_init_signals(struct omap_mux_partition *partition,
+ struct omap_board_mux *board_mux)
{
omap_mux_set_cmdline_signals();
omap_mux_write_array(partition, board_mux);
@@ -1024,8 +1109,8 @@ static void omap_mux_init_package(struct omap_mux *superset,
{
}
-static void omap_mux_init_signals(struct omap_mux_partition *partition,
- struct omap_board_mux *board_mux)
+static void __init omap_mux_init_signals(struct omap_mux_partition *partition,
+ struct omap_board_mux *board_mux)
{
}