Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8baf560b4c901fb554d15e056aaa7f34b2345be5
Commit: 8baf560b4c901fb554d15e056aaa7f34b2345be5
Parent: 471b9a6c7304d5f59503d111e71e60a7e19fb9a0
Author: Michael Hennerich <[EMAIL PROTECTED]>
AuthorDate: Mon Dec 24 18:51:34 2007 +0800
Committer: Bryan Wu <[EMAIL PROTECTED]>
CommitDate: Mon Dec 24 18:51:34 2007 +0800
[Blackfin] arch: Enable both edge triggered GPIO IRQs on BF54x and use
irq_to_gpio()
Signed-off-by: Michael Hennerich <[EMAIL PROTECTED]>
Signed-off-by: Bryan Wu <[EMAIL PROTECTED]>
---
arch/blackfin/mach-common/ints-priority-sc.c | 67 ++++++++++++++++++--------
1 files changed, 46 insertions(+), 21 deletions(-)
diff --git a/arch/blackfin/mach-common/ints-priority-sc.c
b/arch/blackfin/mach-common/ints-priority-sc.c
index 36ef4d1..dec42ac 100644
--- a/arch/blackfin/mach-common/ints-priority-sc.c
+++ b/arch/blackfin/mach-common/ints-priority-sc.c
@@ -483,6 +483,10 @@ static void bfin_demux_gpio_irq(unsigned int intb_irq,
static unsigned char irq2pint_lut[NR_PINTS];
static unsigned char pint2irq_lut[NR_PINT_SYS_IRQS * NR_PINT_BITS];
+static unsigned int gpio_both_edge_triggered[NR_PINT_SYS_IRQS];
+static unsigned short gpio_enabled[gpio_bank(MAX_BLACKFIN_GPIOS)];
+
+
struct pin_int_t {
unsigned int mask_set;
unsigned int mask_clear;
@@ -549,13 +553,20 @@ void init_pint_lut(void)
}
-static unsigned short gpio_enabled[gpio_bank(MAX_BLACKFIN_GPIOS)];
-
static void bfin_gpio_ack_irq(unsigned int irq)
{
u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
+ u32 pintbit = PINT_BIT(pint_val);
+ u8 bank = PINT_2_BANK(pint_val);
+
+ if (unlikely(gpio_both_edge_triggered[bank] & pintbit)) {
+ if (pint[bank]->invert_set & pintbit)
+ pint[bank]->invert_clear = pintbit;
+ else
+ pint[bank]->invert_set = pintbit;
+ }
+ pint[bank]->request = pintbit;
- pint[PINT_2_BANK(pint_val)]->request = PINT_BIT(pint_val);
SSYNC();
}
@@ -565,6 +576,13 @@ static void bfin_gpio_mask_ack_irq(unsigned int irq)
u32 pintbit = PINT_BIT(pint_val);
u8 bank = PINT_2_BANK(pint_val);
+ if (unlikely(gpio_both_edge_triggered[bank] & pintbit)) {
+ if (pint[bank]->invert_set & pintbit)
+ pint[bank]->invert_clear = pintbit;
+ else
+ pint[bank]->invert_set = pintbit;
+ }
+
pint[bank]->request = pintbit;
pint[bank]->mask_clear = pintbit;
SSYNC();
@@ -593,7 +611,7 @@ static unsigned int bfin_gpio_irq_startup(unsigned int irq)
{
unsigned int ret;
char buf[8];
- u16 gpionr = irq - IRQ_PA0;
+ u16 gpionr = irq_to_gpio(irq);
u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
if (pint_val == IRQ_NOT_AVAIL) {
@@ -618,9 +636,11 @@ static unsigned int bfin_gpio_irq_startup(unsigned int irq)
static void bfin_gpio_irq_shutdown(unsigned int irq)
{
+ u16 gpionr = irq_to_gpio(irq);
+
bfin_gpio_mask_irq(irq);
- gpio_free(irq - IRQ_PA0);
- gpio_enabled[gpio_bank(irq - IRQ_PA0)] &= ~gpio_bit(irq - IRQ_PA0);
+ gpio_free(gpionr);
+ gpio_enabled[gpio_bank(gpionr)] &= ~gpio_bit(gpionr);
}
static int bfin_gpio_irq_type(unsigned int irq, unsigned int type)
@@ -628,7 +648,7 @@ static int bfin_gpio_irq_type(unsigned int irq, unsigned
int type)
unsigned int ret;
char buf[8];
- u16 gpionr = irq - IRQ_PA0;
+ u16 gpionr = irq_to_gpio(irq);
u8 pint_val = irq2pint_lut[irq - SYS_IRQS];
u32 pintbit = PINT_BIT(pint_val);
u8 bank = PINT_2_BANK(pint_val);
@@ -660,28 +680,33 @@ static int bfin_gpio_irq_type(unsigned int irq, unsigned
int type)
gpio_direction_input(gpionr);
- if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
- pint[bank]->edge_set = pintbit;
- } else {
- pint[bank]->edge_clear = pintbit;
- }
-
if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW)))
pint[bank]->invert_set = pintbit; /* low or falling edge
denoted by one */
else
- pint[bank]->invert_set = pintbit; /* high or rising edge
denoted by zero */
+ pint[bank]->invert_clear = pintbit; /* high or rising edge
denoted by zero */
- if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
- pint[bank]->invert_set = pintbit;
- else
- pint[bank]->invert_set = pintbit;
+ if ((type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
+ == (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
- SSYNC();
+ gpio_both_edge_triggered[bank] |= pintbit;
- if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
+ if (gpio_get_value(gpionr))
+ pint[bank]->invert_set = pintbit;
+ else
+ pint[bank]->invert_clear = pintbit;
+ } else {
+ gpio_both_edge_triggered[bank] &= ~pintbit;
+ }
+
+ if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
+ pint[bank]->edge_set = pintbit;
set_irq_handler(irq, handle_edge_irq);
- else
+ } else {
+ pint[bank]->edge_clear = pintbit;
set_irq_handler(irq, handle_level_irq);
+ }
+
+ SSYNC();
return 0;
}
-
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