forked from Minki/linux
b533f8ae79
Make the interrupt numbers match the OpenPIC spec intead of the Freescale docs which distinguish between internal and external interrupts. Now we can use the interrupt number directly to find the register offset associated with it. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
132 lines
2.9 KiB
C
132 lines
2.9 KiB
C
/*
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* MPC8544 DS Board Setup
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*
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* Author Xianghua Xiao (x.xiao@freescale.com)
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* Copyright 2007 Freescale Semiconductor Inc.
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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/stddef.h>
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#include <linux/kernel.h>
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#include <linux/kdev_t.h>
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#include <linux/delay.h>
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#include <linux/seq_file.h>
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#include <asm/system.h>
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#include <asm/time.h>
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#include <asm/machdep.h>
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#include <asm/mpc85xx.h>
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#include <mm/mmu_decl.h>
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#include <asm/prom.h>
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#include <asm/udbg.h>
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#include <asm/mpic.h>
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#include <asm/i8259.h>
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#include <sysdev/fsl_soc.h>
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#include "mpc85xx.h"
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#undef DEBUG
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#ifdef DEBUG
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#define DBG(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
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#else
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#define DBG(fmt, args...)
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#endif
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void __init mpc8544_ds_pic_init(void)
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{
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struct mpic *mpic;
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struct resource r;
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struct device_node *np = NULL;
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#ifdef CONFIG_PPC_I8259
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struct device_node *cascade_node = NULL;
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int cascade_irq;
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#endif
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np = of_find_node_by_type(np, "open-pic");
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if (np == NULL) {
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printk(KERN_ERR "Could not find open-pic node\n");
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return;
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}
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if (of_address_to_resource(np, 0, &r)) {
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printk(KERN_ERR "Failed to map mpic register space\n");
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of_node_put(np);
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return;
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}
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mpic = mpic_alloc(np, r.start,
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MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
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0, 256, " OpenPIC ");
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BUG_ON(mpic == NULL);
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mpic_init(mpic);
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#ifdef CONFIG_PPC_I8259
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/* Initialize the i8259 controller */
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for_each_node_by_type(np, "interrupt-controller")
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if (of_device_is_compatible(np, "chrp,iic")) {
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cascade_node = np;
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break;
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}
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if (cascade_node == NULL) {
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printk(KERN_DEBUG "Could not find i8259 PIC\n");
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return;
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}
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cascade_irq = irq_of_parse_and_map(cascade_node, 0);
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if (cascade_irq == NO_IRQ) {
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printk(KERN_ERR "Failed to map cascade interrupt\n");
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return;
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}
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DBG("mpc8544ds: cascade mapped to irq %d\n", cascade_irq);
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i8259_init(cascade_node, 0);
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of_node_put(cascade_node);
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set_irq_chained_handler(cascade_irq, mpc8544_8259_cascade);
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#endif /* CONFIG_PPC_I8259 */
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}
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/*
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* Setup the architecture
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*/
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static void __init mpc8544_ds_setup_arch(void)
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{
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if (ppc_md.progress)
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ppc_md.progress("mpc8544_ds_setup_arch()", 0);
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printk("MPC8544 DS board from Freescale Semiconductor\n");
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}
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/*
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* Called very early, device-tree isn't unflattened
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*/
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static int __init mpc8544_ds_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, "MPC8544DS");
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}
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define_machine(mpc8544_ds) {
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.name = "MPC8544 DS",
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.probe = mpc8544_ds_probe,
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.setup_arch = mpc8544_ds_setup_arch,
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.init_IRQ = mpc8544_ds_pic_init,
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.get_irq = mpic_get_irq,
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.restart = mpc85xx_restart,
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.calibrate_decr = generic_calibrate_decr,
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.progress = udbg_progress,
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};
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