From: Thomas Petazzoni <t-petazzoni@xxxxxx>
Introduce a chained interrupt handler mechanism for the PRCM
interrupt, so that individual PRCM event can cleanly be handled by
handlers in separate drivers. We do this by introducing PRCM event
names, which are then matched to the particular PRCM interrupt bit
depending on the specific OMAP SoC being used.
arch/arm/mach-omap2/prcm.c implements the chained interrupt mechanism
itself, with individual PRCM events for OMAP3 and OMAP4 being
described in arch/arm/mach-omap2/prcm3xxx.c and
arch/arm/mach-omap2/prcm4xxx.c respectively. At initialization time,
the set of PRCM events is filtered against the SoC on which we are
running, keeping only the ones that are actually useful. All the logic
is written to be generic with regard to OMAP3/OMAP4, even though OMAP3
has single PRCM event registers and OMAP4 has two PRCM event
registers.
The wakeup and I/O PRCM events are now handled as two separate
interrupts, and their handler is registered with IRQF_NO_SUSPEND,
otherwise the IRQ gets disabled during suspend, which prevents resume.
Patch tested on OMAP3 BeagleBoard, with a suspend/resume cycle to both
retention and off mode. No test done on OMAP4.
Signed-off-by: Thomas Petazzoni <t-petazzoni@xxxxxx>
Cc: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
Cc: Cousson, Benoit <b-cousson@xxxxxx>
---
arch/arm/mach-omap2/Makefile | 4 +
arch/arm/mach-omap2/pm34xx.c | 104 ++++++------------
arch/arm/mach-omap2/pm44xx.c | 8 ++
arch/arm/mach-omap2/prcm.c | 186 ++++++++++++++++++++++++++++++++
arch/arm/mach-omap2/prcm3xxx.c | 117 ++++++++++++++++++++
arch/arm/mach-omap2/prcm4xxx.c | 146 +++++++++++++++++++++++++
arch/arm/plat-omap/include/plat/irqs.h | 9 ++-
arch/arm/plat-omap/include/plat/prcm.h | 45 ++++++++
8 files changed, 548 insertions(+), 71 deletions(-)
create mode 100644 arch/arm/mach-omap2/prcm3xxx.c
create mode 100644 arch/arm/mach-omap2/prcm4xxx.c
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index 7805545..a227f4d 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -36,6 +36,10 @@ AFLAGS_sram242x.o :=-Wa,-march=armv6
AFLAGS_sram243x.o :=-Wa,-march=armv6
AFLAGS_sram34xx.o :=-Wa,-march=armv7-a
+# PRCM
+obj-$(CONFIG_ARCH_OMAP3) += prcm3xxx.o
+obj-$(CONFIG_ARCH_OMAP4) += prcm4xxx.o
+
# Pin multiplexing
obj-$(CONFIG_ARCH_OMAP2420) += mux2420.o
obj-$(CONFIG_ARCH_OMAP2430) += mux2430.o
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 1c716c8..ec1b7f6 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -236,7 +236,7 @@ static int prcm_clear_mod_irqs(s16 module, u8 regs)
return c;
}
-static int _prcm_int_handle_wakeup(void)
+static irqreturn_t _prcm_int_handle_wakeup(int irq, void *unused)
{
int c;
@@ -248,64 +248,10 @@ static int _prcm_int_handle_wakeup(void)
c += prcm_clear_mod_irqs(OMAP3430ES2_USBHOST_MOD, 1);
}
- return c;
-}
-
-/*
- * PRCM Interrupt Handler
- *
- * The PRM_IRQSTATUS_MPU register indicates if there are any pending
- * interrupts from the PRCM for the MPU. These bits must be cleared in
- * order to clear the PRCM interrupt. The PRCM interrupt handler is
- * implemented to simply clear the PRM_IRQSTATUS_MPU in order to clear
- * the PRCM interrupt. Please note that bit 0 of the PRM_IRQSTATUS_MPU
- * register indicates that a wake-up event is pending for the MPU and
- * this bit can only be cleared if the all the wake-up events latched
- * in the various PM_WKST_x registers have been cleared. The interrupt
- * handler is implemented using a do-while loop so that if a wake-up
- * event occurred during the processing of the prcm interrupt handler
- * (setting a bit in the corresponding PM_WKST_x register and thus
- * preventing us from clearing bit 0 of the PRM_IRQSTATUS_MPU register)
- * this would be handled.
- */
-static irqreturn_t prcm_interrupt_handler (int irq, void *dev_id)
-{
- u32 irqenable_mpu, irqstatus_mpu;
- int c = 0;
-
- irqenable_mpu = omap2_prm_read_mod_reg(OCP_MOD,
- OMAP3_PRM_IRQENABLE_MPU_OFFSET);
- irqstatus_mpu = omap2_prm_read_mod_reg(OCP_MOD,
- OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
- irqstatus_mpu &= irqenable_mpu;
-
- do {
- if (irqstatus_mpu & (OMAP3430_WKUP_ST_MASK |
- OMAP3430_IO_ST_MASK)) {
- c = _prcm_int_handle_wakeup();
-
- /*
- * Is the MPU PRCM interrupt handler racing with the
- * IVA2 PRCM interrupt handler ?
- */
- WARN(c == 0, "prcm: WARNING: PRCM indicated MPU wakeup "
- "but no wakeup sources are marked\n");
- } else {
- /* XXX we need to expand our PRCM interrupt handler */
- WARN(1, "prcm: WARNING: PRCM interrupt received, but "
- "no code to handle it (%08x)\n", irqstatus_mpu);
- }
-
- omap2_prm_write_mod_reg(irqstatus_mpu, OCP_MOD,
- OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
-
- irqstatus_mpu = omap2_prm_read_mod_reg(OCP_MOD,
- OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
- irqstatus_mpu &= irqenable_mpu;
-
- } while (irqstatus_mpu);
-
- return IRQ_HANDLED;
+ if (c)
+ return IRQ_HANDLED;
+ else
+ return IRQ_NONE;
}
static void restore_control_register(u32 val)
@@ -1006,20 +952,32 @@ static int __init omap3_pm_init(void)
/* XXX prcm_setup_regs needs to be before enabling hw
* supervised mode for powerdomains */
prcm_setup_regs();
+ ret = omap_prcm_irq_init();
+ if (ret) {
+ pr_err("omap_prcm_irq_init() failed with %d\n", ret);
+ goto err_prcm_irq_init;
+ }
+
+ ret = request_irq(omap_prcm_event_to_irq("wkup"),
+ _prcm_int_handle_wakeup,
+ IRQF_NO_SUSPEND, "prcm_wkup", NULL);
+ if (ret) {
+ pr_err("request_irq failed to register for PRCM wakeup\n");
+ goto err_prcm_irq_wkup;
+ }
- ret = request_irq(INT_34XX_PRCM_MPU_IRQ,
- (irq_handler_t)prcm_interrupt_handler,
- IRQF_DISABLED, "prcm", NULL);
+ ret = request_irq(omap_prcm_event_to_irq("io"),
+ _prcm_int_handle_wakeup,
+ IRQF_NO_SUSPEND, "prcm_io", NULL);
if (ret) {
- printk(KERN_ERR "request_irq failed to register for 0x%x\n",
- INT_34XX_PRCM_MPU_IRQ);
- goto err1;
+ pr_err("request_irq failed to register for PRCM io\n");
+ goto err_prcm_irq_io;
}
ret = pwrdm_for_each(pwrdms_setup, NULL);
if (ret) {
printk(KERN_ERR "Failed to setup powerdomains\n");
- goto err2;
+ goto err_pwrdms_setup;
}
(void) clkdm_for_each(clkdms_setup, NULL);
@@ -1027,7 +985,7 @@ static int __init omap3_pm_init(void)
mpu_pwrdm = pwrdm_lookup("mpu_pwrdm");
if (mpu_pwrdm == NULL) {
printk(KERN_ERR "Failed to get mpu_pwrdm\n");
- goto err2;
+ goto err_pwrdms_setup;
}
neon_pwrdm = pwrdm_lookup("neon_pwrdm");
@@ -1068,14 +1026,20 @@ static int __init omap3_pm_init(void)
}
omap3_save_scratchpad_contents();
-err1:
+
return ret;
-err2:
- free_irq(INT_34XX_PRCM_MPU_IRQ, NULL);
+
+ err_pwrdms_setup:
+ free_irq(omap_prcm_event_to_irq("io"), NULL);
list_for_each_entry_safe(pwrst, tmp, &pwrst_list, node) {
list_del(&pwrst->node);
kfree(pwrst);
}
+ err_prcm_irq_io:
+ free_irq(omap_prcm_event_to_irq("wkup"), NULL);
+ err_prcm_irq_wkup:
+ omap_prcm_irq_cleanup();
+ err_prcm_irq_init:
return ret;
}
diff --git a/arch/arm/mach-omap2/pm44xx.c b/arch/arm/mach-omap2/pm44xx.c
index e9f4862..127ae4a 100644
--- a/arch/arm/mach-omap2/pm44xx.c
+++ b/arch/arm/mach-omap2/pm44xx.c
@@ -18,6 +18,7 @@
#include "powerdomain.h"
#include <mach/omap4-common.h>
+#include <plat/prcm.h>
struct power_state {
struct powerdomain *pwrdm;
@@ -104,6 +105,11 @@ static int __init omap4_pm_init(void)
return -ENODEV;
pr_err("Power Management for TI OMAP4.\n");
+ ret = omap_prcm_irq_init();
+ if (ret) {
+ pr_err("omap_prcm_irq_init() failed with %d\n", ret);
+ goto err1;
+ }
#ifdef CONFIG_PM
ret = pwrdm_for_each(pwrdms_setup, NULL);
@@ -118,6 +124,8 @@ static int __init omap4_pm_init(void)
#endif /* CONFIG_SUSPEND */
err2:
+ omap_prcm_irq_cleanup();
+err1:
return ret;
}
late_initcall(omap4_pm_init);
diff --git a/arch/arm/mach-omap2/prcm.c b/arch/arm/mach-omap2/prcm.c
index c22e726..e9e26b6 100644
--- a/arch/arm/mach-omap2/prcm.c
+++ b/arch/arm/mach-omap2/prcm.c
@@ -23,6 +23,8 @@
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
#include <plat/common.h>
#include <plat/prcm.h>
@@ -44,6 +46,190 @@ void __iomem *cm2_base;
#define MAX_MODULE_ENABLE_WAIT 100000
+/* Array of valid PRCM events for the current OMAP */
+static struct omap_prcm_irq *omap_prcm_irqs;
+
+/* Number of entries in omap_prcm_irqs */
+static int omap_prcm_irqs_nr;
+
+/* Pointers to either OMAP3 or OMAP4 specific functions */
+static void (*omap_prcm_mask_event)(unsigned event);
+static void (*omap_prcm_unmask_event)(unsigned event);
+static void (*omap_prcm_ack_event)(unsigned event);
+static void (*omap_prcm_pending_events)(unsigned long *pending);
+
+static void prcm_irq_ack(unsigned irq)
+{
+ unsigned int prcm_irq = irq - OMAP_PRCM_IRQ_BASE;
+ omap_prcm_ack_event(prcm_irq);
+}
+
+static void prcm_irq_mask(unsigned irq)
+{
+ unsigned int prcm_irq = irq - OMAP_PRCM_IRQ_BASE;
+ omap_prcm_mask_event(prcm_irq);
+}
+
+static void prcm_irq_unmask(unsigned irq)
+{
+ unsigned int prcm_irq = irq - OMAP_PRCM_IRQ_BASE;
+ omap_prcm_unmask_event(prcm_irq);
+}
+
+static struct irq_chip prcm_irq_chip = {
+ .name = "PRCM",
+ .ack = prcm_irq_ack,
+ .mask = prcm_irq_mask,
+ .unmask = prcm_irq_unmask,
+};
+
+/*
+ * PRCM Interrupt Handler
+ *
+ * The PRM_IRQSTATUS_MPU register indicates if there are any pending
+ * interrupts from the PRCM for the MPU. These bits must be cleared in
+ * order to clear the PRCM interrupt. The PRCM interrupt handler is
+ * implemented to simply clear the PRM_IRQSTATUS_MPU in order to clear
+ * the PRCM interrupt. Please note that bit 0 of the PRM_IRQSTATUS_MPU
+ * register indicates that a wake-up event is pending for the MPU and
+ * this bit can only be cleared if the all the wake-up events latched
+ * in the various PM_WKST_x registers have been cleared. The interrupt
+ * handler is implemented using a do-while loop so that if a wake-up
+ * event occurred during the processing of the prcm interrupt handler
+ * (setting a bit in the corresponding PM_WKST_x register and thus
+ * preventing us from clearing bit 0 of the PRM_IRQSTATUS_MPU register)
+ * this would be handled.
+ */
+static void prcm_irq_handler(unsigned int irq, struct irq_desc *desc)
+{
+ unsigned long pending[OMAP_PRCM_MAX_NR_PENDING_REG];
+
+ /*
+ * Loop until all pending irqs are handled, since
+ * generic_handle_irq(), called by prcm_irq_handle_virtirqs()
+ * can cause new irqs to come
+ */
+ while (1) {
+ unsigned int virtirq;
+
+ desc->chip->ack(irq);
+
+ memset(pending, 0, sizeof(pending));
+ omap_prcm_pending_events(pending);
+
+ /* No bit set, then all IRQs are handled */
+ if (find_first_bit(pending, OMAP_PRCM_NR_IRQS)
+ >= OMAP_PRCM_NR_IRQS) {
+ desc->chip->unmask(irq);
+ break;
+ }
+
+ /*
+ * Loop on all currently pending irqs so that new irqs
+ * cannot starve previously pending irqs
+ */
+ for_each_set_bit(virtirq, pending, OMAP_PRCM_NR_IRQS)
+ generic_handle_irq(OMAP_PRCM_IRQ_BASE + virtirq);
+
+ desc->chip->unmask(irq);
+ }
+}
+
+/*
+ * Given a PRCM event name, returns the corresponding IRQ on which the
+ * handler should be registered.
+ */
+int omap_prcm_event_to_irq(const char *name)
+{
+ int i;
+
+ for (i = 0; i < omap_prcm_irqs_nr; i++)
+ if (!strcmp(omap_prcm_irqs[i].name, name))
+ return OMAP_PRCM_IRQ_BASE + omap_prcm_irqs[i].offset;
+
+ return -ENOENT;
+}
+
+/*
+ * Prepare the array of PRCM events corresponding to the current SoC,
+ * and set-up the chained interrupt handler mechanism.
+ */
+int omap_prcm_irq_init(void)
+{
+ int i, j;
+ struct omap_prcm_irq *unfiltered_irqs;
+ unsigned unfiltered_irqs_nr;
+
+ if (cpu_is_omap34xx() || cpu_is_omap3630()) {
+ unfiltered_irqs = omap_prcm_3xxx_irqs;
+ unfiltered_irqs_nr = omap_prcm_3xxx_irqs_nr;
+ omap_prcm_mask_event = omap3_prcm_mask_event;
+ omap_prcm_unmask_event = omap3_prcm_unmask_event;
+ omap_prcm_ack_event = omap3_prcm_ack_event;
+ omap_prcm_pending_events = omap3_prcm_pending_events;
+ set_irq_chained_handler(INT_34XX_PRCM_MPU_IRQ,
+ prcm_irq_handler);
+ } else if (cpu_is_omap44xx()) {
+ unfiltered_irqs = omap_prcm_4xxx_irqs;
+ unfiltered_irqs_nr = omap_prcm_4xxx_irqs_nr;
+ omap_prcm_mask_event = omap4_prcm_mask_event;
+ omap_prcm_unmask_event = omap4_prcm_unmask_event;
+ omap_prcm_ack_event = omap4_prcm_ack_event;
+ omap_prcm_pending_events = omap4_prcm_pending_events;
+ set_irq_chained_handler(OMAP44XX_IRQ_PRCM, prcm_irq_handler);
+ } else {
+ return -ENODEV;
+ }
+
+ for (i = 0; i < unfiltered_irqs_nr; i++)
+ if (omap_chip_is(unfiltered_irqs[i].omap_chip))
+ omap_prcm_irqs_nr++;
+
+ omap_prcm_irqs = kmalloc(omap_prcm_irqs_nr *
+ sizeof(struct omap_prcm_irq),
+ GFP_KERNEL);
+ if (!omap_prcm_irqs)
+ return -ENOMEM;
+
+ for (i = 0, j = 0; i < unfiltered_irqs_nr; i++)
+ if (omap_chip_is(unfiltered_irqs[i].omap_chip)) {
+ memcpy(&omap_prcm_irqs[j], &unfiltered_irqs[i],
+ sizeof(struct omap_prcm_irq));
+ j++;
+ }
+
+ for (i = OMAP_PRCM_IRQ_BASE; i < OMAP_PRCM_IRQ_END; i++) {
+ set_irq_chip(i, &prcm_irq_chip);
+ set_irq_handler(i, handle_level_irq);
+ set_irq_flags(i, IRQF_VALID);
+ }
+
+ return 0;
+}
+
+/*
+ * Reverses memory allocated and other setups done by
+ * omap_prcm_irq_init().
+ */
+void omap_prcm_irq_cleanup(void)
+{
+ int i;
+
+ for (i = OMAP_PRCM_IRQ_BASE; i < OMAP_PRCM_IRQ_END; i++) {
+ set_irq_chip(i, NULL);
+ set_irq_handler(i, NULL);
+ set_irq_flags(i, 0);
+ }
+
+ kfree(omap_prcm_irqs);
+
+ if (cpu_is_omap34xx() || cpu_is_omap3630()) {
+ set_irq_chained_handler(INT_34XX_PRCM_MPU_IRQ, NULL);
+ } else {
+ set_irq_chained_handler(OMAP44XX_IRQ_PRCM, NULL);
+ }
+}
+
u32 omap_prcm_get_reset_sources(void)
{
/* XXX This presumably needs modification for 34XX */
diff --git a/arch/arm/mach-omap2/prcm3xxx.c b/arch/arm/mach-omap2/prcm3xxx.c
new file mode 100644
index 0000000..a57fe69
--- /dev/null
+++ b/arch/arm/mach-omap2/prcm3xxx.c
@@ -0,0 +1,117 @@
+/*
+ * linux/arch/arm/mach-omap2/prcm3xxx.c
+ *
+ * OMAP 3xxx Power Reset and Clock Management (PRCM) interrupt
+ * definitions
+ *
+ * Written by Thomas Petazzoni <t-petazzoni@xxxxxx>
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+
+#include <plat/prcm.h>
+
+#include "prm-regbits-24xx.h"
+
+struct omap_prcm_irq __initdata omap_prcm_3xxx_irqs[] = {
+ OMAP_PRCM_IRQ("wkup", 0,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("evgenon", 2,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("evgenoff", 3,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("transition", 4,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("core_dpll_recal", 5,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("periph_dpll_recal", 6,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("mpu_dpll_recal", 7,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("iva2_dpll_recal", 8,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("io", 9,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vp1_oppchangedone", 10,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vp1_minvdd", 11,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vp1_maxvdd", 12,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vp1_nosmpsack", 13,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vp1_eqvalue", 14,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vp1_tranxdone", 15,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vp2_oppchangedone", 16,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vp2_minvdd", 17,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vp2_maxvdd", 18,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vp2_nosmpsack", 19,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vp2_eqvalue", 20,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vp2_tranxdone", 21,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vc_saerr", 22,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vc_raerr", 23,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vc_timeout_err", 24,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("snd_periph_recal", 25,
+ CHIP_IS_OMAP3430 | CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("abb_ldo_tranxdone", 26,
+ CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vc_vp1_ack", 27,
+ CHIP_GE_OMAP3630ES1_1),
+ OMAP_PRCM_IRQ("vc_bypass_ack", 28,
+ CHIP_GE_OMAP3630ES1_1),
+};
+
+unsigned int __initdata
+omap_prcm_3xxx_irqs_nr = ARRAY_SIZE(omap_prcm_3xxx_irqs);
+
+void omap3_prcm_mask_event(unsigned event)
+{
+ unsigned int bit = BIT(event);
+
+ omap2_prm_rmw_mod_reg_bits(bit, 0, OCP_MOD,
+ OMAP3_PRM_IRQENABLE_MPU_OFFSET);
+}
+
+void omap3_prcm_unmask_event(unsigned event)
+{
+ unsigned int bit = BIT(event);
+
+ omap2_prm_rmw_mod_reg_bits(0, bit, OCP_MOD,
+ OMAP3_PRM_IRQENABLE_MPU_OFFSET);
+}
+
+void omap3_prcm_ack_event(unsigned event)
+{
+ unsigned int bit = BIT(event);
+
+ omap2_prm_write_mod_reg(bit, OCP_MOD,
+ OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
+}
+
+void omap3_prcm_pending_events(unsigned long *events)
+{
+ u32 irqenable_mpu =
+ omap2_prm_read_mod_reg(OCP_MOD,
+ OMAP3_PRM_IRQENABLE_MPU_OFFSET);
+ u32 irqstatus_mpu =
+ omap2_prm_read_mod_reg(OCP_MOD,
+ OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
+ events[0] = irqenable_mpu & irqstatus_mpu;
+}
diff --git a/arch/arm/mach-omap2/prcm4xxx.c b/arch/arm/mach-omap2/prcm4xxx.c
new file mode 100644
index 0000000..e70f267
--- /dev/null
+++ b/arch/arm/mach-omap2/prcm4xxx.c
@@ -0,0 +1,146 @@
+/*
+ * linux/arch/arm/mach-omap2/prcm4xxx.c
+ *
+ * OMAP 4xxx Power Reset and Clock Management (PRCM) interrupt
+ * definitions
+ *
+ * Written by Thomas Petazzoni <t-petazzoni@xxxxxx>
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+
+#include <plat/prcm.h>
+
+#include "prcm44xx.h"
+#include "prm44xx.h"
+
+struct omap_prcm_irq __initdata omap_prcm_4xxx_irqs[] = {
+ OMAP_PRCM_IRQ("dpll_core_recal", 0,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("dpll_mpu_recal", 1,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("dpll_iva_recal", 2,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("dpll_per_recal", 3,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("dpll_abe_recal", 4,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("dpll_usb_recal", 5,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("dpll_unipro_recal", 7,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("transition", 8,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("io", 9,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vc_saerr", 11,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vc_raerr", 12,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vc_toerr", 13,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vc_bypassack", 14,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_core_oppchangedone", 16,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_core_minvdd", 17,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_core_maxvdd", 18,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_core_nosmpsack", 19,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_core_eqvalue", 20,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_core_tranxdone", 21,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_iva_oppchangedone", 24,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_iva_minvdd", 25,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_iva_maxvdd", 26,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_iva_nosmpsack", 27,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_iva_eqvalue", 28,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_iva_tranxdone", 29,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_iva_vpack", 30,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("abb_iva_done", 31,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_mpu_oppchangedone", 32,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_mpu_minvdd", 33,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_mpu_maxvdd", 34,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_mpu_nosmpsack", 35,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_mpu_eqvalue", 36,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_mpu_tranxdone", 37,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("vp_mpu_vpack", 38,
+ CHIP_IS_OMAP4430),
+ OMAP_PRCM_IRQ("abb_mpu_done", 39,
+ CHIP_IS_OMAP4430),
+};
+
+unsigned int __initdata
+omap_prcm_4xxx_irqs_nr = ARRAY_SIZE(omap_prcm_4xxx_irqs);
+
+void omap4_prcm_mask_event(unsigned event)
+{
+ unsigned int bit = BIT(event % 32);
+ unsigned int off = (event / 32) * 4;
+
+ omap4_prm_rmw_inst_reg_bits(bit, 0,
+ OMAP4430_PRM_OCP_SOCKET_INST,
+ OMAP4_PRM_IRQENABLE_MPU_OFFSET + off);
+}
+
+void omap4_prcm_unmask_event(unsigned event)
+{
+ unsigned int bit = BIT(event % 32);
+ unsigned int off = (event / 32) * 4;
+
+ omap4_prm_rmw_inst_reg_bits(0, bit,
+ OMAP4430_PRM_OCP_SOCKET_INST,
+ OMAP4_PRM_IRQENABLE_MPU_OFFSET + off);
+}
+
+void omap4_prcm_ack_event(unsigned event)
+{
+ unsigned int bit = BIT(event % 32);
+ unsigned int off = (event / 32) * 4;
+
+ omap4_prm_write_inst_reg(bit,
+ OMAP4430_PRM_OCP_SOCKET_INST,
+ OMAP4_PRM_IRQSTATUS_MPU_OFFSET + off);
+}
+
+void omap4_prcm_pending_events(unsigned long *events)
+{
+ u32 irqenable_mpu, irqstatus_mpu;
+ int i;
+
+ /* OMAP4 has two enable/status registers for the PRCM */
+ for (i = 0; i < 2; i++) {
+ irqenable_mpu =
+ omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
+ OMAP4_PRM_IRQENABLE_MPU_OFFSET
+ + i * 4);
+ irqstatus_mpu =
+ omap4_prm_read_inst_reg(OMAP4430_PRM_OCP_SOCKET_INST,
+ OMAP4_PRM_IRQSTATUS_MPU_OFFSET
+ + i * 4);
+ events[i] = irqenable_mpu & irqstatus_mpu;
+ }
+}
diff --git a/arch/arm/plat-omap/include/plat/irqs.h b/arch/arm/plat-omap/include/plat/irqs.h
index 2910de9..82c708a 100644
--- a/arch/arm/plat-omap/include/plat/irqs.h
+++ b/arch/arm/plat-omap/include/plat/irqs.h
@@ -363,7 +363,14 @@
#define OMAP_MAX_GPIO_LINES 192
#define IH_GPIO_BASE (128 + IH2_BASE)
#define IH_MPUIO_BASE (OMAP_MAX_GPIO_LINES + IH_GPIO_BASE)
-#define OMAP_IRQ_END (IH_MPUIO_BASE + 16)
+#define OMAP_MPUIO_IRQ_END (IH_MPUIO_BASE + 16)
+
+/* 64 IRQs for the PRCM (32 are needed on OMAP3, 64 on OMAP4) */
+#define OMAP_PRCM_IRQ_BASE (OMAP_MPUIO_IRQ_END)
+#define OMAP_PRCM_NR_IRQS 64
+#define OMAP_PRCM_IRQ_END (OMAP_PRCM_IRQ_BASE + OMAP_PRCM_NR_IRQS)
+
+#define OMAP_IRQ_END (OMAP_PRCM_IRQ_END)
/* External FPGA handles interrupts on Innovator boards */
#define OMAP_FPGA_IRQ_BASE (OMAP_IRQ_END)
diff --git a/arch/arm/plat-omap/include/plat/prcm.h b/arch/arm/plat-omap/include/plat/prcm.h
index 2fdf8c8..a260274 100644
--- a/arch/arm/plat-omap/include/plat/prcm.h
+++ b/arch/arm/plat-omap/include/plat/prcm.h
@@ -27,6 +27,51 @@
#ifndef __ASM_ARM_ARCH_OMAP_PRCM_H
#define __ASM_ARM_ARCH_OMAP_PRCM_H
+#include <plat/cpu.h>
+
+/*
+ * Structure describing the interrupt corresponding to each PRCM event
+ */
+struct omap_prcm_irq {
+ /* Logical name for the interrupt */
+ const char *name;
+
+ /*
+ * Corresponding offset in the status/enable register. The
+ * offset can be greater than 32, in which case it spans over
+ * the second status register
+ */
+ unsigned int offset;
+
+ /* OMAP chip for which this PRCM event exists */
+ const struct omap_chip_id omap_chip;
+};
+
+#define OMAP_PRCM_IRQ(_name, _offset, _chip) \
+ { .name = _name, \
+ .offset = _offset, \
+ .omap_chip = OMAP_CHIP_INIT(_chip) }
+
+/* Maximum number of PRCM interrupt status registers */
+#define OMAP_PRCM_MAX_NR_PENDING_REG 2
+
+extern struct omap_prcm_irq omap_prcm_3xxx_irqs[];
+extern unsigned int omap_prcm_3xxx_irqs_nr;
+void omap3_prcm_mask_event(unsigned event);
+void omap3_prcm_unmask_event(unsigned event);
+void omap3_prcm_ack_event(unsigned event);
+void omap3_prcm_pending_events(unsigned long *pending);
+
+extern struct omap_prcm_irq omap_prcm_4xxx_irqs[];
+extern unsigned int omap_prcm_4xxx_irqs_nr;
+void omap4_prcm_mask_event(unsigned event);
+void omap4_prcm_unmask_event(unsigned event);
+void omap4_prcm_ack_event(unsigned event);
+void omap4_prcm_pending_events(unsigned long *pending);
+
+int omap_prcm_event_to_irq(const char *name);
+int omap_prcm_irq_init(void);
+void omap_prcm_irq_cleanup(void);
u32 omap_prcm_get_reset_sources(void);
void omap_prcm_arch_reset(char mode, const char *cmd);
int omap2_cm_wait_idlest(void __iomem *reg, u32 mask, u8 idlest,
--
1.7.0.4
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