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/*
* Helper functions for I/O pins.
*
* Copyright (c) 2005-2007 Axis Communications AB.
*/
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <asm/io.h>
#include <mach/pinmux.h>
#include <hwregs/gio_defs.h>
struct crisv32_ioport crisv32_ioports[] = {
{
(unsigned long *)REG_ADDR(gio, regi_gio, rw_pa_oe),
(unsigned long *)REG_ADDR(gio, regi_gio, rw_pa_dout),
(unsigned long *)REG_ADDR(gio, regi_gio, r_pa_din),
32
},
{
(unsigned long *)REG_ADDR(gio, regi_gio, rw_pb_oe),
(unsigned long *)REG_ADDR(gio, regi_gio, rw_pb_dout),
(unsigned long *)REG_ADDR(gio, regi_gio, r_pb_din),
32
},
{
(unsigned long *)REG_ADDR(gio, regi_gio, rw_pc_oe),
(unsigned long *)REG_ADDR(gio, regi_gio, rw_pc_dout),
(unsigned long *)REG_ADDR(gio, regi_gio, r_pc_din),
16
},
};
#define NBR_OF_PORTS sizeof(crisv32_ioports)/sizeof(struct crisv32_ioport)
struct crisv32_iopin crisv32_led_net0_green;
struct crisv32_iopin crisv32_led_net0_red;
struct crisv32_iopin crisv32_led2_green;
struct crisv32_iopin crisv32_led2_red;
struct crisv32_iopin crisv32_led3_green;
struct crisv32_iopin crisv32_led3_red;
/* Dummy port used when green LED and red LED is on the same bit */
static unsigned long io_dummy;
static struct crisv32_ioport dummy_port = {
&io_dummy,
&io_dummy,
&io_dummy,
32
};
static struct crisv32_iopin dummy_led = {
&dummy_port,
0
};
static int __init crisv32_io_init(void)
{
int ret = 0;
u32 i;
/* Locks *should* be dynamically initialized. */
for (i = 0; i < ARRAY_SIZE(crisv32_ioports); i++)
spin_lock_init(&crisv32_ioports[i].lock);
spin_lock_init(&dummy_port.lock);
/* Initialize LEDs */
#if (defined(CONFIG_ETRAX_NBR_LED_GRP_ONE) || defined(CONFIG_ETRAX_NBR_LED_GRP_TWO))
ret += crisv32_io_get_name(&crisv32_led_net0_green,
CONFIG_ETRAX_LED_G_NET0);
crisv32_io_set_dir(&crisv32_led_net0_green, crisv32_io_dir_out);
if (strcmp(CONFIG_ETRAX_LED_G_NET0, CONFIG_ETRAX_LED_R_NET0)) {
ret += crisv32_io_get_name(&crisv32_led_net0_red,
CONFIG_ETRAX_LED_R_NET0);
crisv32_io_set_dir(&crisv32_led_net0_red, crisv32_io_dir_out);
} else
crisv32_led_net0_red = dummy_led;
#endif
ret += crisv32_io_get_name(&crisv32_led2_green, CONFIG_ETRAX_V32_LED2G);
ret += crisv32_io_get_name(&crisv32_led2_red, CONFIG_ETRAX_V32_LED2R);
ret += crisv32_io_get_name(&crisv32_led3_green, CONFIG_ETRAX_V32_LED3G);
ret += crisv32_io_get_name(&crisv32_led3_red, CONFIG_ETRAX_V32_LED3R);
crisv32_io_set_dir(&crisv32_led2_green, crisv32_io_dir_out);
crisv32_io_set_dir(&crisv32_led2_red, crisv32_io_dir_out);
crisv32_io_set_dir(&crisv32_led3_green, crisv32_io_dir_out);
crisv32_io_set_dir(&crisv32_led3_red, crisv32_io_dir_out);
return ret;
}
__initcall(crisv32_io_init);
int crisv32_io_get(struct crisv32_iopin *iopin,
unsigned int port, unsigned int pin)
{
if (port > NBR_OF_PORTS)
return -EINVAL;
if (port > crisv32_ioports[port].pin_count)
return -EINVAL;
iopin->bit = 1 << pin;
iopin->port = &crisv32_ioports[port];
if (crisv32_pinmux_alloc(port, pin, pin, pinmux_gpio))
return -EIO;
return 0;
}
int crisv32_io_get_name(struct crisv32_iopin *iopin, const char *name)
{
int port;
int pin;
if (toupper(*name) == 'P')
name++;
if (toupper(*name) < 'A' || toupper(*name) > 'E')
return -EINVAL;
port = toupper(*name) - 'A';
name++;
pin = simple_strtoul(name, NULL, 10);
if (pin < 0 || pin > crisv32_ioports[port].pin_count)
return -EINVAL;
iopin->bit = 1 << pin;
iopin->port = &crisv32_ioports[port];
if (crisv32_pinmux_alloc(port, pin, pin, pinmux_gpio))
return -EIO;
return 0;
}
#ifdef CONFIG_PCI
/* PCI I/O access stuff */
struct cris_io_operations *cris_iops = NULL;
EXPORT_SYMBOL(cris_iops);
#endif
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