[Blackfin] arch: hook up set_irq_wake in Blackfin's irq code

 - Add support for irq_wake on system and gpio interrupts
 - Remove outdated kernel options
 - Add option to select default PM mode
 - Fix various places where SIC_IWRx was only handled partially

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

1 files changed, 121 insertions, 5 deletions

diff --git a/arch/blackfin/mach-common/ints-priority.c b/arch/blackfin/mach-common/ints-priority.c
index 166dbba0c396..81d00183ae91 100644
--- a/arch/blackfin/mach-common/ints-priority.c
+++ b/arch/blackfin/mach-common/ints-priority.c
@@ -1,5 +1,5 @@
 /*
- * File:         arch/blackfin/mach-common/ints-priority-sc.c
+ * File:         arch/blackfin/mach-common/ints-priority.c
  * Based on:
  * Author:
  *
@@ -13,7 +13,7 @@
  *               2002 Arcturus Networks Inc. MaTed <mated@sympatico.ca>
  *               2003 Metrowerks/Motorola
  *               2003 Bas Vermeulen <bas@buyways.nl>
- *               Copyright 2004-2007 Analog Devices Inc.
+ *               Copyright 2004-2008 Analog Devices Inc.
  *
  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
  *
@@ -69,6 +69,10 @@ unsigned long irq_flags = 0x1f;
 /* The number of spurious interrupts */
 atomic_t num_spurious;
 
+#ifdef CONFIG_PM
+unsigned long bfin_sic_iwr[3];  /* Up to 3 SIC_IWRx registers */
+#endif
+
 struct ivgx {
         /* irq number for request_irq, available in mach-bf533/irq.h */
         unsigned int irqno;
@@ -178,6 +182,27 @@ static void bfin_internal_unmask_irq(unsigned int irq)
         SSYNC();
 }
 
+#ifdef CONFIG_PM
+int bfin_internal_set_wake(unsigned int irq, unsigned int state)
+{
+        unsigned bank, bit;
+        unsigned long flags;
+        bank = (irq - (IRQ_CORETMR + 1)) / 32;
+        bit = (irq - (IRQ_CORETMR + 1)) % 32;
+
+        local_irq_save(flags);
+
+        if (state)
+                bfin_sic_iwr[bank] |= (1 << bit);
+        else
+                bfin_sic_iwr[bank] &= ~(1 << bit);
+
+        local_irq_restore(flags);
+
+        return 0;
+}
+#endif
+
 static struct irq_chip bfin_core_irqchip = {
         .ack = ack_noop,
         .mask = bfin_core_mask_irq,
@@ -188,6 +213,9 @@ static struct irq_chip bfin_internal_irqchip = {
         .ack = ack_noop,
         .mask = bfin_internal_mask_irq,
         .unmask = bfin_internal_unmask_irq,
+#ifdef CONFIG_PM
+        .set_wake = bfin_internal_set_wake,
+#endif
 };
 
 #ifdef BF537_GENERIC_ERROR_INT_DEMUX
@@ -434,6 +462,20 @@ static int bfin_gpio_irq_type(unsigned int irq, unsigned int type)
         return 0;
 }
 
+#ifdef CONFIG_PM
+int bfin_gpio_set_wake(unsigned int irq, unsigned int state)
+{
+        unsigned gpio = irq_to_gpio(irq);
+
+        if (state)
+                gpio_pm_wakeup_request(gpio, PM_WAKE_IGNORE);
+        else
+                gpio_pm_wakeup_free(gpio);
+
+        return 0;
+}
+#endif
+
 static struct irq_chip bfin_gpio_irqchip = {
         .ack = bfin_gpio_ack_irq,
         .mask = bfin_gpio_mask_irq,
@@ -441,7 +483,10 @@ static struct irq_chip bfin_gpio_irqchip = {
         .unmask = bfin_gpio_unmask_irq,
         .set_type = bfin_gpio_irq_type,
         .startup = bfin_gpio_irq_startup,
-        .shutdown = bfin_gpio_irq_shutdown
+        .shutdown = bfin_gpio_irq_shutdown,
+#ifdef CONFIG_PM
+        .set_wake = bfin_gpio_set_wake,
+#endif
 };
 
 static void bfin_demux_gpio_irq(unsigned int inta_irq,
@@ -487,7 +532,7 @@ static void bfin_demux_gpio_irq(unsigned int inta_irq,
         }
 
         if (search) {
-                for (i = 0; i < MAX_BLACKFIN_GPIOS; i += 16) {
+                for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
                         irq += i;
 
                         mask = get_gpiop_data(i) &
@@ -763,6 +808,74 @@ static int bfin_gpio_irq_type(unsigned int irq, unsigned int type)
         return 0;
 }
 
+#ifdef CONFIG_PM
+u32 pint_saved_masks[NR_PINT_SYS_IRQS];
+u32 pint_wakeup_masks[NR_PINT_SYS_IRQS];
+
+int bfin_gpio_set_wake(unsigned int irq, unsigned int state)
+{
+        u32 pint_irq;
+        u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
+        u32 bank = PINT_2_BANK(pint_val);
+        u32 pintbit = PINT_BIT(pint_val);
+
+        switch (bank) {
+        case 0:
+                pint_irq = IRQ_PINT0;
+                break;
+        case 2:
+                pint_irq = IRQ_PINT2;
+                break;
+        case 3:
+                pint_irq = IRQ_PINT3;
+                break;
+        case 1:
+                pint_irq = IRQ_PINT1;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        bfin_internal_set_wake(pint_irq, state);
+
+        if (state)
+                pint_wakeup_masks[bank] |= pintbit;
+        else
+                pint_wakeup_masks[bank] &= ~pintbit;
+
+        return 0;
+}
+
+u32 bfin_pm_setup(void)
+{
+        u32 val, i;
+
+        for (i = 0; i < NR_PINT_SYS_IRQS; i++) {
+                val = pint[i]->mask_clear;
+                pint_saved_masks[i] = val;
+                if (val ^ pint_wakeup_masks[i]) {
+                        pint[i]->mask_clear = val;
+                        pint[i]->mask_set = pint_wakeup_masks[i];
+                }
+        }
+
+        return 0;
+}
+
+void bfin_pm_restore(void)
+{
+        u32 i, val;
+
+        for (i = 0; i < NR_PINT_SYS_IRQS; i++) {
+                val = pint_saved_masks[i];
+                if (val ^ pint_wakeup_masks[i]) {
+                        pint[i]->mask_clear = pint[i]->mask_clear;
+                        pint[i]->mask_set = val;
+                }
+        }
+}
+#endif
+
 static struct irq_chip bfin_gpio_irqchip = {
         .ack = bfin_gpio_ack_irq,
         .mask = bfin_gpio_mask_irq,
@@ -770,7 +883,10 @@ static struct irq_chip bfin_gpio_irqchip = {
         .unmask = bfin_gpio_unmask_irq,
         .set_type = bfin_gpio_irq_type,
         .startup = bfin_gpio_irq_startup,
-        .shutdown = bfin_gpio_irq_shutdown
+        .shutdown = bfin_gpio_irq_shutdown,
+#ifdef CONFIG_PM
+        .set_wake = bfin_gpio_set_wake,
+#endif
 };
 
 static void bfin_demux_gpio_irq(unsigned int inta_irq,