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path: root/arch/arm/plat-s5p/irq-gpioint.c
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Diffstat (limited to 'arch/arm/plat-s5p/irq-gpioint.c')
-rw-r--r--arch/arm/plat-s5p/irq-gpioint.c170
1 files changed, 102 insertions, 68 deletions
diff --git a/arch/arm/plat-s5p/irq-gpioint.c b/arch/arm/plat-s5p/irq-gpioint.c
index 3b6bf89d173..cd87d3256e0 100644
--- a/arch/arm/plat-s5p/irq-gpioint.c
+++ b/arch/arm/plat-s5p/irq-gpioint.c
@@ -17,82 +17,79 @@
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/gpio.h>
+#include <linux/slab.h>
#include <mach/map.h>
#include <plat/gpio-core.h>
#include <plat/gpio-cfg.h>
-#define S5P_GPIOREG(x) (S5P_VA_GPIO + (x))
+#define GPIO_BASE(chip) (((unsigned long)(chip)->base) & 0xFFFFF000u)
-#define GPIOINT_CON_OFFSET 0x700
-#define GPIOINT_MASK_OFFSET 0x900
-#define GPIOINT_PEND_OFFSET 0xA00
+#define CON_OFFSET 0x700
+#define MASK_OFFSET 0x900
+#define PEND_OFFSET 0xA00
+#define REG_OFFSET(x) ((x) << 2)
-static struct s3c_gpio_chip *irq_chips[S5P_GPIOINT_GROUP_MAXNR];
-
-static int s5p_gpioint_get_group(struct irq_data *data)
-{
- struct gpio_chip *chip = irq_data_get_irq_data(data);
- struct s3c_gpio_chip *s3c_chip = container_of(chip,
- struct s3c_gpio_chip, chip);
- int group;
-
- for (group = 0; group < S5P_GPIOINT_GROUP_MAXNR; group++)
- if (s3c_chip == irq_chips[group])
- break;
+struct s5p_gpioint_bank {
+ struct list_head list;
+ int start;
+ int nr_groups;
+ int irq;
+ struct s3c_gpio_chip **chips;
+ void (*handler)(unsigned int, struct irq_desc *);
+};
- return group;
-}
+LIST_HEAD(banks);
static int s5p_gpioint_get_offset(struct irq_data *data)
{
- struct gpio_chip *chip = irq_data_get_irq_data(data);
- struct s3c_gpio_chip *s3c_chip = container_of(chip,
- struct s3c_gpio_chip, chip);
-
- return data->irq - s3c_chip->irq_base;
+ struct s3c_gpio_chip *chip = irq_data_get_irq_data(data);
+ return data->irq - chip->irq_base;
}
static void s5p_gpioint_ack(struct irq_data *data)
{
+ struct s3c_gpio_chip *chip = irq_data_get_irq_data(data);
int group, offset, pend_offset;
unsigned int value;
- group = s5p_gpioint_get_group(data);
+ group = chip->group;
offset = s5p_gpioint_get_offset(data);
- pend_offset = group << 2;
+ pend_offset = REG_OFFSET(group);
- value = __raw_readl(S5P_GPIOREG(GPIOINT_PEND_OFFSET) + pend_offset);
- value |= 1 << offset;
- __raw_writel(value, S5P_GPIOREG(GPIOINT_PEND_OFFSET) + pend_offset);
+ value = __raw_readl(GPIO_BASE(chip) + PEND_OFFSET + pend_offset);
+ value |= BIT(offset);
+ __raw_writel(value, GPIO_BASE(chip) + PEND_OFFSET + pend_offset);
}
static void s5p_gpioint_mask(struct irq_data *data)
{
+ struct s3c_gpio_chip *chip = irq_data_get_irq_data(data);
int group, offset, mask_offset;
unsigned int value;
- group = s5p_gpioint_get_group(data);
+ group = chip->group;
offset = s5p_gpioint_get_offset(data);
- mask_offset = group << 2;
+ mask_offset = REG_OFFSET(group);
- value = __raw_readl(S5P_GPIOREG(GPIOINT_MASK_OFFSET) + mask_offset);
- value |= 1 << offset;
- __raw_writel(value, S5P_GPIOREG(GPIOINT_MASK_OFFSET) + mask_offset);
+ value = __raw_readl(GPIO_BASE(chip) + MASK_OFFSET + mask_offset);
+ value |= BIT(offset);
+ __raw_writel(value, GPIO_BASE(chip) + MASK_OFFSET + mask_offset);
}
static void s5p_gpioint_unmask(struct irq_data *data)
{
+ struct s3c_gpio_chip *chip = irq_data_get_irq_data(data);
int group, offset, mask_offset;
unsigned int value;
- group = s5p_gpioint_get_group(data);
+ group = chip->group;
offset = s5p_gpioint_get_offset(data);
- mask_offset = group << 2;
+ mask_offset = REG_OFFSET(group);
- value = __raw_readl(S5P_GPIOREG(GPIOINT_MASK_OFFSET) + mask_offset);
- value &= ~(1 << offset);
- __raw_writel(value, S5P_GPIOREG(GPIOINT_MASK_OFFSET) + mask_offset);
+ value = __raw_readl(GPIO_BASE(chip) + MASK_OFFSET + mask_offset);
+ value &= ~BIT(offset);
+ __raw_writel(value, GPIO_BASE(chip) + MASK_OFFSET + mask_offset);
}
static void s5p_gpioint_mask_ack(struct irq_data *data)
@@ -103,12 +100,13 @@ static void s5p_gpioint_mask_ack(struct irq_data *data)
static int s5p_gpioint_set_type(struct irq_data *data, unsigned int type)
{
+ struct s3c_gpio_chip *chip = irq_data_get_irq_data(data);
int group, offset, con_offset;
unsigned int value;
- group = s5p_gpioint_get_group(data);
+ group = chip->group;
offset = s5p_gpioint_get_offset(data);
- con_offset = group << 2;
+ con_offset = REG_OFFSET(group);
switch (type) {
case IRQ_TYPE_EDGE_RISING:
@@ -132,15 +130,15 @@ static int s5p_gpioint_set_type(struct irq_data *data, unsigned int type)
return -EINVAL;
}
- value = __raw_readl(S5P_GPIOREG(GPIOINT_CON_OFFSET) + con_offset);
+ value = __raw_readl(GPIO_BASE(chip) + CON_OFFSET + con_offset);
value &= ~(0x7 << (offset * 0x4));
value |= (type << (offset * 0x4));
- __raw_writel(value, S5P_GPIOREG(GPIOINT_CON_OFFSET) + con_offset);
+ __raw_writel(value, GPIO_BASE(chip) + CON_OFFSET + con_offset);
return 0;
}
-struct irq_chip s5p_gpioint = {
+static struct irq_chip s5p_gpioint = {
.name = "s5p_gpioint",
.irq_ack = s5p_gpioint_ack,
.irq_mask = s5p_gpioint_mask,
@@ -151,30 +149,29 @@ struct irq_chip s5p_gpioint = {
static void s5p_gpioint_handler(unsigned int irq, struct irq_desc *desc)
{
- int group, offset, pend_offset, mask_offset;
- int real_irq;
+ struct s5p_gpioint_bank *bank = get_irq_data(irq);
+ int group, pend_offset, mask_offset;
unsigned int pend, mask;
- for (group = 0; group < S5P_GPIOINT_GROUP_MAXNR; group++) {
- pend_offset = group << 2;
- pend = __raw_readl(S5P_GPIOREG(GPIOINT_PEND_OFFSET) +
- pend_offset);
+ for (group = 0; group < bank->nr_groups; group++) {
+ struct s3c_gpio_chip *chip = bank->chips[group];
+ if (!chip)
+ continue;
+
+ pend_offset = REG_OFFSET(group);
+ pend = __raw_readl(GPIO_BASE(chip) + PEND_OFFSET + pend_offset);
if (!pend)
continue;
- mask_offset = group << 2;
- mask = __raw_readl(S5P_GPIOREG(GPIOINT_MASK_OFFSET) +
- mask_offset);
+ mask_offset = REG_OFFSET(group);
+ mask = __raw_readl(GPIO_BASE(chip) + MASK_OFFSET + mask_offset);
pend &= ~mask;
- for (offset = 0; offset < 8; offset++) {
- if (pend & (1 << offset)) {
- struct s3c_gpio_chip *chip = irq_chips[group];
- if (chip) {
- real_irq = chip->irq_base + offset;
- generic_handle_irq(real_irq);
- }
- }
+ while (pend) {
+ int offset = fls(pend) - 1;
+ int real_irq = chip->irq_base + offset;
+ generic_handle_irq(real_irq);
+ pend &= ~BIT(offset);
}
}
}
@@ -182,27 +179,48 @@ static void s5p_gpioint_handler(unsigned int irq, struct irq_desc *desc)
static __init int s5p_gpioint_add(struct s3c_gpio_chip *chip)
{
static int used_gpioint_groups = 0;
- static bool handler_registered = 0;
int irq, group = chip->group;
int i;
+ struct s5p_gpioint_bank *bank = NULL;
if (used_gpioint_groups >= S5P_GPIOINT_GROUP_COUNT)
return -ENOMEM;
+ list_for_each_entry(bank, &banks, list) {
+ if (group >= bank->start &&
+ group < bank->start + bank->nr_groups)
+ break;
+ }
+ if (!bank)
+ return -EINVAL;
+
+ if (!bank->handler) {
+ bank->chips = kzalloc(sizeof(struct s3c_gpio_chip *) *
+ bank->nr_groups, GFP_KERNEL);
+ if (!bank->chips)
+ return -ENOMEM;
+
+ set_irq_chained_handler(bank->irq, s5p_gpioint_handler);
+ set_irq_data(bank->irq, bank);
+ bank->handler = s5p_gpioint_handler;
+ printk(KERN_INFO "Registered chained gpio int handler for interrupt %d.\n",
+ bank->irq);
+ }
+
+ /*
+ * chained GPIO irq has been sucessfully registered, allocate new gpio
+ * int group and assign irq nubmers
+ */
+
chip->irq_base = S5P_GPIOINT_BASE +
used_gpioint_groups * S5P_GPIOINT_GROUP_SIZE;
used_gpioint_groups++;
- if (!handler_registered) {
- set_irq_chained_handler(IRQ_GPIOINT, s5p_gpioint_handler);
- handler_registered = 1;
- }
-
- irq_chips[group] = chip;
+ bank->chips[group - bank->start] = chip;
for (i = 0; i < chip->chip.ngpio; i++) {
irq = chip->irq_base + i;
set_irq_chip(irq, &s5p_gpioint);
- set_irq_data(irq, &chip->chip);
+ set_irq_data(irq, chip);
set_irq_handler(irq, handle_level_irq);
set_irq_flags(irq, IRQF_VALID);
}
@@ -235,3 +253,19 @@ int __init s5p_register_gpio_interrupt(int pin)
}
return ret;
}
+
+int __init s5p_register_gpioint_bank(int chain_irq, int start, int nr_groups)
+{
+ struct s5p_gpioint_bank *bank;
+
+ bank = kzalloc(sizeof(*bank), GFP_KERNEL);
+ if (!bank)
+ return -ENOMEM;
+
+ bank->start = start;
+ bank->nr_groups = nr_groups;
+ bank->irq = chain_irq;
+
+ list_add_tail(&bank->list, &banks);
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-18 04:13:47 +0000