drivers/gpio/cs5535-gpio.c: add some additional cs5535-specific GPIO functionality

[pandora-kernel.git] / drivers / gpio / cs5535-gpio.c

diff --git a/drivers/gpio/cs5535-gpio.c b/drivers/gpio/cs5535-gpio.c
index d3e55a0..815d98b 100644 (file)
--- a/drivers/gpio/cs5535-gpio.c
+++ b/drivers/gpio/cs5535-gpio.c
@@ -15,6 +15,7 @@
 #include <linux/gpio.h>
 #include <linux/io.h>
 #include <linux/cs5535.h>
+#include <asm/msr.h>
 
 #define DRV_NAME "cs5535-gpio"
 #define GPIO_BAR 1
@@ -144,6 +145,57 @@ int cs5535_gpio_isset(unsigned offset, unsigned int reg)
 }
 EXPORT_SYMBOL_GPL(cs5535_gpio_isset);
 
+int cs5535_gpio_set_irq(unsigned group, unsigned irq)
+{
+       uint32_t lo, hi;
+
+       if (group > 7 || irq > 15)
+               return -EINVAL;
+
+       rdmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
+
+       lo &= ~(0xF << (group * 4));
+       lo |= (irq & 0xF) << (group * 4);
+
+       wrmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
+       return 0;
+}
+EXPORT_SYMBOL_GPL(cs5535_gpio_set_irq);
+
+void cs5535_gpio_setup_event(unsigned offset, int pair, int pme)
+{
+       struct cs5535_gpio_chip *chip = &cs5535_gpio_chip;
+       uint32_t shift = (offset % 8) * 4;
+       unsigned long flags;
+       uint32_t val;
+
+       if (offset >= 24)
+               offset = GPIO_MAP_W;
+       else if (offset >= 16)
+               offset = GPIO_MAP_Z;
+       else if (offset >= 8)
+               offset = GPIO_MAP_Y;
+       else
+               offset = GPIO_MAP_X;
+
+       spin_lock_irqsave(&chip->lock, flags);
+       val = inl(chip->base + offset);
+
+       /* Clear whatever was there before */
+       val &= ~(0xF << shift);
+
+       /* Set the new value */
+       val |= ((pair & 7) << shift);
+
+       /* Set the PME bit if this is a PME event */
+       if (pme)
+               val |= (1 << (shift + 3));
+
+       outl(val, chip->base + offset);
+       spin_unlock_irqrestore(&chip->lock, flags);
+}
+EXPORT_SYMBOL_GPL(cs5535_gpio_setup_event);
+
 /*
  * Generic gpio_chip API support.
  */