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-rw-r--r--arch/mips/bcm47xx/gpio.c85
-rw-r--r--arch/mips/bcm47xx/setup.c5
-rw-r--r--arch/mips/bcm47xx/wgt634u.c40
3 files changed, 77 insertions, 53 deletions
diff --git a/arch/mips/bcm47xx/gpio.c b/arch/mips/bcm47xx/gpio.c
index f5a53acf995..9b798800258 100644
--- a/arch/mips/bcm47xx/gpio.c
+++ b/arch/mips/bcm47xx/gpio.c
@@ -12,68 +12,51 @@
#include <asm/mach-bcm47xx/bcm47xx.h>
#include <asm/mach-bcm47xx/gpio.h>
-int bcm47xx_gpio_to_irq(unsigned gpio)
+#if (BCM47XX_CHIPCO_GPIO_LINES > BCM47XX_EXTIF_GPIO_LINES)
+static DECLARE_BITMAP(gpio_in_use, BCM47XX_CHIPCO_GPIO_LINES);
+#else
+static DECLARE_BITMAP(gpio_in_use, BCM47XX_EXTIF_GPIO_LINES);
+#endif
+
+int gpio_request(unsigned gpio, const char *tag)
{
- if (ssb_bcm47xx.chipco.dev)
- return ssb_mips_irq(ssb_bcm47xx.chipco.dev) + 2;
- else if (ssb_bcm47xx.extif.dev)
- return ssb_mips_irq(ssb_bcm47xx.extif.dev) + 2;
- else
+ if (ssb_chipco_available(&ssb_bcm47xx.chipco) &&
+ ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
return -EINVAL;
-}
-EXPORT_SYMBOL_GPL(bcm47xx_gpio_to_irq);
-int bcm47xx_gpio_get_value(unsigned gpio)
-{
- if (ssb_bcm47xx.chipco.dev)
- return ssb_chipco_gpio_in(&ssb_bcm47xx.chipco, 1 << gpio);
- else if (ssb_bcm47xx.extif.dev)
- return ssb_extif_gpio_in(&ssb_bcm47xx.extif, 1 << gpio);
- else
- return 0;
-}
-EXPORT_SYMBOL_GPL(bcm47xx_gpio_get_value);
+ if (ssb_extif_available(&ssb_bcm47xx.extif) &&
+ ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
+ return -EINVAL;
-void bcm47xx_gpio_set_value(unsigned gpio, int value)
-{
- if (ssb_bcm47xx.chipco.dev)
- ssb_chipco_gpio_out(&ssb_bcm47xx.chipco,
- 1 << gpio,
- value ? 1 << gpio : 0);
- else if (ssb_bcm47xx.extif.dev)
- ssb_extif_gpio_out(&ssb_bcm47xx.extif,
- 1 << gpio,
- value ? 1 << gpio : 0);
-}
-EXPORT_SYMBOL_GPL(bcm47xx_gpio_set_value);
+ if (test_and_set_bit(gpio, gpio_in_use))
+ return -EBUSY;
-int bcm47xx_gpio_direction_input(unsigned gpio)
-{
- if (ssb_bcm47xx.chipco.dev && (gpio < BCM47XX_CHIPCO_GPIO_LINES))
- ssb_chipco_gpio_outen(&ssb_bcm47xx.chipco,
- 1 << gpio, 0);
- else if (ssb_bcm47xx.extif.dev && (gpio < BCM47XX_EXTIF_GPIO_LINES))
- ssb_extif_gpio_outen(&ssb_bcm47xx.extif,
- 1 << gpio, 0);
- else
- return -EINVAL;
return 0;
}
-EXPORT_SYMBOL_GPL(bcm47xx_gpio_direction_input);
+EXPORT_SYMBOL(gpio_request);
-int bcm47xx_gpio_direction_output(unsigned gpio, int value)
+void gpio_free(unsigned gpio)
{
- bcm47xx_gpio_set_value(gpio, value);
+ if (ssb_chipco_available(&ssb_bcm47xx.chipco) &&
+ ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
+ return;
+
+ if (ssb_extif_available(&ssb_bcm47xx.extif) &&
+ ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
+ return;
+
+ clear_bit(gpio, gpio_in_use);
+}
+EXPORT_SYMBOL(gpio_free);
- if (ssb_bcm47xx.chipco.dev && (gpio < BCM47XX_CHIPCO_GPIO_LINES))
- ssb_chipco_gpio_outen(&ssb_bcm47xx.chipco,
- 1 << gpio, 1 << gpio);
- else if (ssb_bcm47xx.extif.dev && (gpio < BCM47XX_EXTIF_GPIO_LINES))
- ssb_extif_gpio_outen(&ssb_bcm47xx.extif,
- 1 << gpio, 1 << gpio);
+int gpio_to_irq(unsigned gpio)
+{
+ if (ssb_chipco_available(&ssb_bcm47xx.chipco))
+ return ssb_mips_irq(ssb_bcm47xx.chipco.dev) + 2;
+ else if (ssb_extif_available(&ssb_bcm47xx.extif))
+ return ssb_mips_irq(ssb_bcm47xx.extif.dev) + 2;
else
return -EINVAL;
- return 0;
}
-EXPORT_SYMBOL_GPL(bcm47xx_gpio_direction_output);
+EXPORT_SYMBOL_GPL(gpio_to_irq);
diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c
index 8d36f186890..2f580fa160c 100644
--- a/arch/mips/bcm47xx/setup.c
+++ b/arch/mips/bcm47xx/setup.c
@@ -27,6 +27,7 @@
#include <linux/types.h>
#include <linux/ssb/ssb.h>
+#include <linux/ssb/ssb_embedded.h>
#include <asm/bootinfo.h>
#include <asm/reboot.h>
#include <asm/time.h>
@@ -41,7 +42,7 @@ static void bcm47xx_machine_restart(char *command)
printk(KERN_ALERT "Please stand by while rebooting the system...\n");
local_irq_disable();
/* Set the watchdog timer to reset immediately */
- ssb_chipco_watchdog_timer_set(&ssb_bcm47xx.chipco, 1);
+ ssb_watchdog_timer_set(&ssb_bcm47xx, 1);
while (1)
cpu_relax();
}
@@ -50,7 +51,7 @@ static void bcm47xx_machine_halt(void)
{
/* Disable interrupts and watchdog and spin forever */
local_irq_disable();
- ssb_chipco_watchdog_timer_set(&ssb_bcm47xx.chipco, 0);
+ ssb_watchdog_timer_set(&ssb_bcm47xx, 0);
while (1)
cpu_relax();
}
diff --git a/arch/mips/bcm47xx/wgt634u.c b/arch/mips/bcm47xx/wgt634u.c
index d1d90c9ef2f..ef00e7f58c2 100644
--- a/arch/mips/bcm47xx/wgt634u.c
+++ b/arch/mips/bcm47xx/wgt634u.c
@@ -11,6 +11,9 @@
#include <linux/leds.h>
#include <linux/mtd/physmap.h>
#include <linux/ssb/ssb.h>
+#include <linux/interrupt.h>
+#include <linux/reboot.h>
+#include <linux/gpio.h>
#include <asm/mach-bcm47xx/bcm47xx.h>
/* GPIO definitions for the WGT634U */
@@ -99,6 +102,30 @@ static struct platform_device *wgt634u_devices[] __initdata = {
&wgt634u_gpio_leds,
};
+static irqreturn_t gpio_interrupt(int irq, void *ignored)
+{
+ int state;
+
+ /* Interrupts are shared, check if the current one is
+ a GPIO interrupt. */
+ if (!ssb_chipco_irq_status(&ssb_bcm47xx.chipco,
+ SSB_CHIPCO_IRQ_GPIO))
+ return IRQ_NONE;
+
+ state = gpio_get_value(WGT634U_GPIO_RESET);
+
+ /* Interrupt are level triggered, revert the interrupt polarity
+ to clear the interrupt. */
+ gpio_polarity(WGT634U_GPIO_RESET, state);
+
+ if (!state) {
+ printk(KERN_INFO "Reset button pressed");
+ ctrl_alt_del();
+ }
+
+ return IRQ_HANDLED;
+}
+
static int __init wgt634u_init(void)
{
/* There is no easy way to detect that we are running on a WGT634U
@@ -112,6 +139,19 @@ static int __init wgt634u_init(void)
((et0mac[1] == 0x09 && et0mac[2] == 0x5b) ||
(et0mac[1] == 0x0f && et0mac[2] == 0xb5))) {
struct ssb_mipscore *mcore = &ssb_bcm47xx.mipscore;
+
+ printk(KERN_INFO "WGT634U machine detected.\n");
+
+ if (!request_irq(gpio_to_irq(WGT634U_GPIO_RESET),
+ gpio_interrupt, IRQF_SHARED,
+ "WGT634U GPIO", &ssb_bcm47xx.chipco)) {
+ gpio_direction_input(WGT634U_GPIO_RESET);
+ gpio_intmask(WGT634U_GPIO_RESET, 1);
+ ssb_chipco_irq_mask(&ssb_bcm47xx.chipco,
+ SSB_CHIPCO_IRQ_GPIO,
+ SSB_CHIPCO_IRQ_GPIO);
+ }
+
wgt634u_flash_data.width = mcore->flash_buswidth;
wgt634u_flash_resource.start = mcore->flash_window;
wgt634u_flash_resource.end = mcore->flash_window
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-19 06:37:36 +0000