mirror of https://gitee.com/openkylin/linux.git
154 lines
3.2 KiB
C
154 lines
3.2 KiB
C
/*
|
|
* PIKA Warp(tm) board specific routines
|
|
*
|
|
* Copyright (c) 2008 PIKA Technologies
|
|
* Sean MacLennan <smaclennan@pikatech.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/kthread.h>
|
|
|
|
#include <asm/machdep.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/udbg.h>
|
|
#include <asm/time.h>
|
|
#include <asm/uic.h>
|
|
|
|
#include "44x.h"
|
|
|
|
|
|
static __initdata struct of_device_id warp_of_bus[] = {
|
|
{ .compatible = "ibm,plb4", },
|
|
{ .compatible = "ibm,opb", },
|
|
{ .compatible = "ibm,ebc", },
|
|
{},
|
|
};
|
|
|
|
static int __init warp_device_probe(void)
|
|
{
|
|
of_platform_bus_probe(NULL, warp_of_bus, NULL);
|
|
return 0;
|
|
}
|
|
machine_device_initcall(warp, warp_device_probe);
|
|
|
|
static int __init warp_probe(void)
|
|
{
|
|
unsigned long root = of_get_flat_dt_root();
|
|
|
|
return of_flat_dt_is_compatible(root, "pika,warp");
|
|
}
|
|
|
|
define_machine(warp) {
|
|
.name = "Warp",
|
|
.probe = warp_probe,
|
|
.progress = udbg_progress,
|
|
.init_IRQ = uic_init_tree,
|
|
.get_irq = uic_get_irq,
|
|
.restart = ppc44x_reset_system,
|
|
.calibrate_decr = generic_calibrate_decr,
|
|
};
|
|
|
|
|
|
#define LED_GREEN (0x80000000 >> 0)
|
|
#define LED_RED (0x80000000 >> 1)
|
|
|
|
|
|
/* This is for the power LEDs 1 = on, 0 = off, -1 = leave alone */
|
|
void warp_set_power_leds(int green, int red)
|
|
{
|
|
static void __iomem *gpio_base = NULL;
|
|
unsigned leds;
|
|
|
|
if (gpio_base == NULL) {
|
|
struct device_node *np;
|
|
|
|
/* Power LEDS are on the second GPIO controller */
|
|
np = of_find_compatible_node(NULL, NULL, "ibm,gpio-440EP");
|
|
if (np)
|
|
np = of_find_compatible_node(np, NULL, "ibm,gpio-440EP");
|
|
if (np == NULL) {
|
|
printk(KERN_ERR __FILE__ ": Unable to find gpio\n");
|
|
return;
|
|
}
|
|
|
|
gpio_base = of_iomap(np, 0);
|
|
of_node_put(np);
|
|
if (gpio_base == NULL) {
|
|
printk(KERN_ERR __FILE__ ": Unable to map gpio");
|
|
return;
|
|
}
|
|
}
|
|
|
|
leds = in_be32(gpio_base);
|
|
|
|
switch (green) {
|
|
case 0: leds &= ~LED_GREEN; break;
|
|
case 1: leds |= LED_GREEN; break;
|
|
}
|
|
switch (red) {
|
|
case 0: leds &= ~LED_RED; break;
|
|
case 1: leds |= LED_RED; break;
|
|
}
|
|
|
|
out_be32(gpio_base, leds);
|
|
}
|
|
EXPORT_SYMBOL(warp_set_power_leds);
|
|
|
|
|
|
#ifdef CONFIG_SENSORS_AD7414
|
|
static int pika_dtm_thread(void __iomem *fpga)
|
|
{
|
|
extern int ad7414_get_temp(int index);
|
|
|
|
while (!kthread_should_stop()) {
|
|
int temp = ad7414_get_temp(0);
|
|
|
|
out_be32(fpga, temp);
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
schedule_timeout(HZ);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init pika_dtm_start(void)
|
|
{
|
|
struct task_struct *dtm_thread;
|
|
struct device_node *np;
|
|
struct resource res;
|
|
void __iomem *fpga;
|
|
|
|
np = of_find_compatible_node(NULL, NULL, "pika,fpga");
|
|
if (np == NULL)
|
|
return -ENOENT;
|
|
|
|
/* We do not call of_iomap here since it would map in the entire
|
|
* fpga space, which is over 8k.
|
|
*/
|
|
if (of_address_to_resource(np, 0, &res)) {
|
|
of_node_put(np);
|
|
return -ENOENT;
|
|
}
|
|
of_node_put(np);
|
|
|
|
fpga = ioremap(res.start, 0x24);
|
|
if (fpga == NULL)
|
|
return -ENOENT;
|
|
|
|
dtm_thread = kthread_run(pika_dtm_thread, fpga + 0x20, "pika-dtm");
|
|
if (IS_ERR(dtm_thread)) {
|
|
iounmap(fpga);
|
|
return PTR_ERR(dtm_thread);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
device_initcall(pika_dtm_start);
|
|
#endif
|