[POWERPC] 4xx: PIKA Warp base platform

Add the base platform support for the PIKA Warp boards.

Signed-off-by: Sean MacLennan <smaclennan@pikatech.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

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