1 #include <linux/module.h>
2 #include <linux/kernel.h> /* printk() */
3 #include <linux/types.h> /* size_t */
5 #include <linux/spinlock.h>
6 #include <asm/rc32434/rb.h>
8 #define GPIO_BADDR 0xb8050000
11 static volatile unsigned char *devCtl3Base = 0;
12 static unsigned char latchU5State = 0;
13 static spinlock_t clu5Lock = SPIN_LOCK_UNLOCKED;
15 void set434Reg(unsigned regOffs, unsigned bit, unsigned len, unsigned val) {
18 spin_lock_irqsave(&clu5Lock, flags);
19 data = *(volatile unsigned *) (IDT434_REG_BASE + regOffs);
20 for (i = 0; i != len; ++i) {
21 if (val & (1 << i)) data |= (1 << (i + bit));
22 else data &= ~(1 << (i + bit));
24 *(volatile unsigned *) (IDT434_REG_BASE + regOffs) = data;
25 spin_unlock_irqrestore(&clu5Lock, flags);
28 void changeLatchU5(unsigned char orMask, unsigned char nandMask) {
30 spin_lock_irqsave(&clu5Lock, flags);
31 latchU5State = (latchU5State | orMask) & ~nandMask;
32 if( !devCtl3Base) devCtl3Base = (volatile unsigned char *)
33 KSEG1ADDR(*(volatile unsigned *) KSEG1ADDR(0x18010030));
34 *devCtl3Base = latchU5State;
35 spin_unlock_irqrestore(&clu5Lock, flags);
38 u32 gpio_get(gpio_func func)
40 return readl((void *) GPIO_BADDR + func);
43 void gpio_set(gpio_func func, u32 mask, u32 value)
45 u32 val = readl((void *) GPIO_BADDR + func);
50 writel(val, (void *) GPIO_BADDR + func);
53 EXPORT_SYMBOL(gpio_set);
54 EXPORT_SYMBOL(gpio_get);
55 EXPORT_SYMBOL(set434Reg);
56 EXPORT_SYMBOL(changeLatchU5);