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