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authorLars-Peter Clausen <lars@metafoo.de>2010-03-08 20:32:08 +0000
committerLars-Peter Clausen <lars@metafoo.de>2010-03-08 20:32:08 +0000
commitfa445c6a47010f08b7b2e28b3584af150b440d2e (patch)
treebd76e7a6aed361cd12a43da234b2b57087d23b9b /target
parent4ccab48a6bb9b296c8b758d542a482bc7a823398 (diff)
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Export gpio and irq registers through debugfs
SVN-Revision: 20069
Diffstat (limited to 'target')
-rw-r--r--target/linux/xburst/files-2.6.32/arch/mips/jz4740/gpio.c63
-rw-r--r--target/linux/xburst/files-2.6.32/arch/mips/jz4740/irq.c45
2 files changed, 90 insertions, 18 deletions
diff --git a/target/linux/xburst/files-2.6.32/arch/mips/jz4740/gpio.c b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/gpio.c
index 60d6053840..ccaa0602a9 100644
--- a/target/linux/xburst/files-2.6.32/arch/mips/jz4740/gpio.c
+++ b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/gpio.c
@@ -25,6 +25,9 @@
#include <linux/interrupt.h>
#include <linux/bitops.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
#define JZ_GPIO_BASE_A (32*0)
#define JZ_GPIO_BASE_B (32*1)
#define JZ_GPIO_BASE_C (32*2)
@@ -301,6 +304,7 @@ static void jz_gpio_irq_unmask(unsigned int irq)
jz_gpio_set_irq_bit(irq, JZ_REG_GPIO_MASK_CLEAR);
};
+
/* TODO: Check if function is gpio */
static unsigned int jz_gpio_irq_startup(unsigned int irq)
{
@@ -445,18 +449,6 @@ int jz_gpio_suspend(void)
}
chip = jz_gpio_chips;
-#if 0
- for (i = 0; i < ARRAY_SIZE(jz_gpio_chips); ++i, ++chip) {
- printk("GPIO %d: \n", i);
- printk("\tPin: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_PIN)));
- printk("\tData: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_DATA)));
- printk("\tPull: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_PULL)));
- printk("\tFunc: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_FUNC)));
- printk("\tSelect: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_SELECT)));
- printk("\tDirection: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_DIRECTION)));
- printk("\tTrigger: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_TRIGGER)));
- }
-#endif
return 0;
}
@@ -465,6 +457,7 @@ int jz_gpio_resume(void)
{
struct jz_gpio_chip *chip = jz_gpio_chips;
int i;
+
for (i = 0; i < ARRAY_SIZE(jz_gpio_chips); ++i, ++chip) {
writel(~(chip->suspend_mask), GPIO_TO_REG(chip->gpio_chip.base, JZ_REG_GPIO_MASK_CLEAR));
}
@@ -495,3 +488,49 @@ int __init jz_gpiolib_init(void)
return 0;
}
+
+#ifdef CONFIG_DEBUG_FS
+
+static int gpio_regs_show(struct seq_file *s, void *unused)
+{
+ struct jz_gpio_chip *chip = jz_gpio_chips;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(jz_gpio_chips); ++i, ++chip) {
+ seq_printf(s, "GPIO %d: \n", i);
+ seq_printf(s, "\tPin: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_PIN)));
+ seq_printf(s, "\tData: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_DATA)));
+ seq_printf(s, "\tMask: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_MASK)));
+ seq_printf(s, "\tData: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_DATA)));
+ seq_printf(s, "\tPull: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_PULL)));
+ seq_printf(s, "\tFunc: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_FUNC)));
+ seq_printf(s, "\tSelect: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_SELECT)));
+ seq_printf(s, "\tDirection: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_DIRECTION)));
+ seq_printf(s, "\tTrigger: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_TRIGGER)));
+ seq_printf(s, "\tFlag: %.8x\n", readl(CHIP_TO_REG(&chip->gpio_chip, JZ_REG_GPIO_FLAG)));
+ }
+
+ return 0;
+}
+
+static int gpio_regs_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, gpio_regs_show, NULL);
+}
+
+static const struct file_operations gpio_regs_operations = {
+ .open = gpio_regs_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __init gpio_debugfs_init(void)
+{
+ (void) debugfs_create_file("jz_regs_gpio", S_IFREG | S_IRUGO,
+ NULL, NULL, &gpio_regs_operations);
+ return 0;
+}
+subsys_initcall(gpio_debugfs_init);
+
+#endif
diff --git a/target/linux/xburst/files-2.6.32/arch/mips/jz4740/irq.c b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/irq.c
index 2167f2d4cd..a6f4bbf28c 100644
--- a/target/linux/xburst/files-2.6.32/arch/mips/jz4740/irq.c
+++ b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/irq.c
@@ -22,6 +22,9 @@
#include <linux/slab.h>
#include <linux/delay.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
#include <asm/io.h>
#include <asm/mipsregs.h>
#include <asm/irq_cpu.h>
@@ -76,14 +79,11 @@ static struct irq_chip intc_irq_type = {
static irqreturn_t jz4740_cascade(int irq, void *data)
{
uint32_t irq_reg;
- irq_reg = readl(jz_intc_base + JZ_REG_INTC_PENDING);
- if (irq_reg) {
- generic_handle_irq(ffs(irq_reg) - 1 + JZ_IRQ_BASE);
- return IRQ_HANDLED;
- }
+ irq_reg = readl(jz_intc_base + JZ_REG_INTC_PENDING);
+ generic_handle_irq(ffs(irq_reg) - 1 + JZ_IRQ_BASE);
- return 0;
+ return IRQ_HANDLED;
}
static struct irqaction jz4740_cascade_action = {
@@ -128,3 +128,36 @@ void jz4740_intc_resume(void)
{
writel(~jz_intc_saved, jz_intc_base + JZ_REG_INTC_CLEAR_MASK);
}
+
+#ifdef CONFIG_DEBUG_FS
+
+static int intc_regs_show(struct seq_file *s, void *unused)
+{
+ seq_printf(s, "Status:\t\t%08x\n", readl(jz_intc_base + JZ_REG_INTC_STATUS));
+ seq_printf(s, "Mask\t\t%08x\n", readl(jz_intc_base + JZ_REG_INTC_MASK));
+ seq_printf(s, "Pending:\t%08x\n", readl(jz_intc_base + JZ_REG_INTC_PENDING));
+
+ return 0;
+}
+
+static int intc_regs_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, intc_regs_show, NULL);
+}
+
+static const struct file_operations intc_regs_operations = {
+ .open = intc_regs_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __init intc_debugfs_init(void)
+{
+ (void) debugfs_create_file("jz_regs_intc", S_IFREG | S_IRUGO,
+ NULL, NULL, &intc_regs_operations);
+ return 0;
+}
+subsys_initcall(intc_debugfs_init);
+
+#endif