package/broadcom-diag/src/gpio.h

   1 #ifndef __DIAG_GPIO_H
   2 #define __DIAG_GPIO_H
   3 #include <linux/interrupt.h>
   4 #include <linux/gpio.h>
   5 #include <asm/mach-bcm47xx/bcm47xx.h>
   6
   7 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,0,0)
   8 #define ssb_bcm47xx bcm47xx_bus.ssb
   9 #endif
  10
  11 static inline u32 __ssb_write32_masked(struct ssb_device *dev, u16 offset,
  12                                        u32 mask, u32 value)
  13 {
  14         value &= mask;
  15         value |= ssb_read32(dev, offset) & ~mask;
  16         ssb_write32(dev, offset, value);
  17         return value;
  18 }
  19
  20 static void gpio_set_irqenable(int enabled, irqreturn_t (*handler)(int, void *))
  21 {
  22         int irq;
  23
  24         irq = gpio_to_irq(0);
  25         if (irq == -EINVAL) return;
  26
  27         if (enabled) {
  28                 if (request_irq(irq, handler, IRQF_SHARED | IRQF_SAMPLE_RANDOM, "gpio", handler))
  29                         return;
  30         } else {
  31                 free_irq(irq, handler);
  32         }
  33
  34         if (ssb_bcm47xx.chipco.dev)
  35                 __ssb_write32_masked(ssb_bcm47xx.chipco.dev, SSB_CHIPCO_IRQMASK, SSB_CHIPCO_IRQ_GPIO, (enabled ? SSB_CHIPCO_IRQ_GPIO : 0));
  36 }
  37
  38 #define EXTIF_ADDR 0x1f000000
  39 #define EXTIF_UART (EXTIF_ADDR + 0x00800000)
  40
  41 #define GPIO_TYPE_NORMAL        (0x0 << 24)
  42 #define GPIO_TYPE_EXTIF         (0x1 << 24)
  43 #define GPIO_TYPE_MASK          (0xf << 24)
  44
  45 static inline void gpio_set_extif(int gpio, int value)
  46 {
  47         volatile u8 *addr = (volatile u8 *) KSEG1ADDR(EXTIF_UART) + (gpio & ~GPIO_TYPE_MASK);
  48         if (value)
  49                 *addr = 0xFF;
  50         else
  51                 *addr;
  52 }
  53
  54 #endif /* __DIAG_GPIO_H */