diff options
Diffstat (limited to 'arch/powerpc/platforms/44x/warp.c')
| -rw-r--r-- | arch/powerpc/platforms/44x/warp.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/44x/warp.c b/arch/powerpc/platforms/44x/warp.c new file mode 100644 index 000000000000..8f01563dbd2a --- /dev/null +++ b/arch/powerpc/platforms/44x/warp.c @@ -0,0 +1,153 @@ +/* + * 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 + 0x20, 4); + 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 |