[net-next-2.6.git] / arch / powerpc / platforms / amigaone / setup.c

/*
 * AmigaOne platform setup
 *
 * Copyright 2008 Gerhard Pircher (gerhard_pircher@gmx.net)
 *
 *   Based on original amigaone_setup.c source code
 * Copyright 2003 by Hans-Joerg Frieden and Thomas Frieden
 *
 * 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/kernel.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/seq_file.h>
#include <generated/utsrelease.h>

#include <asm/machdep.h>
#include <asm/cputable.h>
#include <asm/pci-bridge.h>
#include <asm/i8259.h>
#include <asm/time.h>
#include <asm/udbg.h>

extern void __flush_disable_L1(void);

void amigaone_show_cpuinfo(struct seq_file *m)
{
	seq_printf(m, "vendor\t\t: Eyetech Ltd.\n");
}

static int __init amigaone_add_bridge(struct device_node *dev)
{
	const u32 *cfg_addr, *cfg_data;
	int len;
	const int *bus_range;
	struct pci_controller *hose;

	printk(KERN_INFO "Adding PCI host bridge %s\n", dev->full_name);

	cfg_addr = of_get_address(dev, 0, NULL, NULL);
	cfg_data = of_get_address(dev, 1, NULL, NULL);
	if ((cfg_addr == NULL) || (cfg_data == NULL))
		return -ENODEV;

	bus_range = of_get_property(dev, "bus-range", &len);
	if ((bus_range == NULL) || (len < 2 * sizeof(int)))
		printk(KERN_WARNING "Can't get bus-range for %s, assume"
		       " bus 0\n", dev->full_name);

	hose = pcibios_alloc_controller(dev);
	if (hose == NULL)
		return -ENOMEM;

	hose->first_busno = bus_range ? bus_range[0] : 0;
	hose->last_busno = bus_range ? bus_range[1] : 0xff;

	setup_indirect_pci(hose, cfg_addr[0], cfg_data[0], 0);

	/* Interpret the "ranges" property */
	/* This also maps the I/O region and sets isa_io/mem_base */
	pci_process_bridge_OF_ranges(hose, dev, 1);

	return 0;
}

void __init amigaone_setup_arch(void)
{
	struct device_node *np;
	int phb = -ENODEV;

	/* Lookup PCI host bridges. */
	for_each_compatible_node(np, "pci", "mai-logic,articia-s")
		phb = amigaone_add_bridge(np);

	BUG_ON(phb != 0);

	if (ppc_md.progress)
		ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0);
}

void __init amigaone_init_IRQ(void)
{
	struct device_node *pic, *np = NULL;
	const unsigned long *prop = NULL;
	unsigned long int_ack = 0;

	/* Search for ISA interrupt controller. */
	pic = of_find_compatible_node(NULL, "interrupt-controller",
	                              "pnpPNP,000");
	BUG_ON(pic == NULL);

	/* Look for interrupt acknowledge address in the PCI root node. */
	np = of_find_compatible_node(NULL, "pci", "mai-logic,articia-s");
	if (np) {
		prop = of_get_property(np, "8259-interrupt-acknowledge", NULL);
		if (prop)
			int_ack = prop[0];
		of_node_put(np);
	}

	if (int_ack == 0)
		printk(KERN_WARNING "Cannot find PCI interrupt acknowledge"
		       " address, polling\n");

	i8259_init(pic, int_ack);
	ppc_md.get_irq = i8259_irq;
	irq_set_default_host(i8259_get_host());
}

static int __init request_isa_regions(void)
{
	request_region(0x00, 0x20, "dma1");
	request_region(0x40, 0x20, "timer");
	request_region(0x80, 0x10, "dma page reg");
	request_region(0xc0, 0x20, "dma2");

	return 0;
}
machine_device_initcall(amigaone, request_isa_regions);

void amigaone_restart(char *cmd)
{
	local_irq_disable();

	/* Flush and disable caches. */
	__flush_disable_L1();

        /* Set SRR0 to the reset vector and turn on MSR_IP. */
	mtspr(SPRN_SRR0, 0xfff00100);
	mtspr(SPRN_SRR1, MSR_IP);

	/* Do an rfi to jump back to firmware. */
	__asm__ __volatile__("rfi" : : : "memory");

	/* Not reached. */
	while (1);
}

static int __init amigaone_probe(void)
{
	unsigned long root = of_get_flat_dt_root();

	if (of_flat_dt_is_compatible(root, "eyetech,amigaone")) {
		/*
		 * Coherent memory access cause complete system lockup! Thus
		 * disable this CPU feature, even if the CPU needs it.
		 */
		cur_cpu_spec->cpu_features &= ~CPU_FTR_NEED_COHERENT;

		ISA_DMA_THRESHOLD = 0x00ffffff;
		DMA_MODE_READ = 0x44;
		DMA_MODE_WRITE = 0x48;

		return 1;
	}

	return 0;
}

define_machine(amigaone) {
	.name			= "AmigaOne",
	.probe			= amigaone_probe,
	.setup_arch		= amigaone_setup_arch,
	.show_cpuinfo		= amigaone_show_cpuinfo,
	.init_IRQ		= amigaone_init_IRQ,
	.restart		= amigaone_restart,
	.calibrate_decr		= generic_calibrate_decr,
	.progress		= udbg_progress,
};
Commit	Line	Data
54b318aa GP	1	/*
	2	* AmigaOne platform setup
	3	*
	4	* Copyright 2008 Gerhard Pircher (gerhard_pircher@gmx.net)
	5	*
	6	* Based on original amigaone_setup.c source code
	7	* Copyright 2003 by Hans-Joerg Frieden and Thomas Frieden
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the
	11	* Free Software Foundation; either version 2 of the License, or (at your
	12	* option) any later version.
	13	*/
	14
	15	#include <linux/kernel.h>
22ae782f GL	16	#include <linux/of.h>
22ae782f GL	17	#include <linux/of_address.h>
54b318aa	18	#include <linux/seq_file.h>
273b281f	19	#include <generated/utsrelease.h>
54b318aa GP	20
	21	#include <asm/machdep.h>
	22	#include <asm/cputable.h>
54b318aa GP	23	#include <asm/pci-bridge.h>
	24	#include <asm/i8259.h>
	25	#include <asm/time.h>
	26	#include <asm/udbg.h>
	27
	28	extern void __flush_disable_L1(void);
	29
	30	void amigaone_show_cpuinfo(struct seq_file *m)
	31	{
	32	seq_printf(m, "vendor\t\t: Eyetech Ltd.\n");
	33	}
	34
	35	static int __init amigaone_add_bridge(struct device_node *dev)
	36	{
	37	const u32 cfg_addr, cfg_data;
	38	int len;
	39	const int *bus_range;
	40	struct pci_controller *hose;
	41
	42	printk(KERN_INFO "Adding PCI host bridge %s\n", dev->full_name);
	43
	44	cfg_addr = of_get_address(dev, 0, NULL, NULL);
	45	cfg_data = of_get_address(dev, 1, NULL, NULL);
	46	if ((cfg_addr == NULL) \|\| (cfg_data == NULL))
	47	return -ENODEV;
	48
	49	bus_range = of_get_property(dev, "bus-range", &len);
	50	if ((bus_range == NULL) \|\| (len < 2 * sizeof(int)))
	51	printk(KERN_WARNING "Can't get bus-range for %s, assume"
	52	" bus 0\n", dev->full_name);
	53
	54	hose = pcibios_alloc_controller(dev);
	55	if (hose == NULL)
	56	return -ENOMEM;
	57
	58	hose->first_busno = bus_range ? bus_range[0] : 0;
	59	hose->last_busno = bus_range ? bus_range[1] : 0xff;
	60
	61	setup_indirect_pci(hose, cfg_addr[0], cfg_data[0], 0);
	62
	63	/* Interpret the "ranges" property */
	64	/* This also maps the I/O region and sets isa_io/mem_base */
	65	pci_process_bridge_OF_ranges(hose, dev, 1);
	66
	67	return 0;
	68	}
	69
	70	void __init amigaone_setup_arch(void)
	71	{
	72	struct device_node *np;
	73	int phb = -ENODEV;
	74
	75	/* Lookup PCI host bridges. */
	76	for_each_compatible_node(np, "pci", "mai-logic,articia-s")
	77	phb = amigaone_add_bridge(np);
	78
	79	BUG_ON(phb != 0);
	80
	81	if (ppc_md.progress)
	82	ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0);
	83	}
	84
	85	void __init amigaone_init_IRQ(void)
	86	{
87	struct device_node pic, np = NULL;
88	const unsigned long *prop = NULL;
89	unsigned long int_ack = 0;
90
91	/* Search for ISA interrupt controller. */
92	pic = of_find_compatible_node(NULL, "interrupt-controller",
93	"pnpPNP,000");
94	BUG_ON(pic == NULL);
95
96	/* Look for interrupt acknowledge address in the PCI root node. */
97	np = of_find_compatible_node(NULL, "pci", "mai-logic,articia-s");
98	if (np) {
99	prop = of_get_property(np, "8259-interrupt-acknowledge", NULL);
100	if (prop)
101	int_ack = prop[0];
102	of_node_put(np);
103	}
104
105	if (int_ack == 0)
106	printk(KERN_WARNING "Cannot find PCI interrupt acknowledge"
107	" address, polling\n");
108
109	i8259_init(pic, int_ack);
110	ppc_md.get_irq = i8259_irq;
111	irq_set_default_host(i8259_get_host());
112	}
113
66dc3304	114	static int __init request_isa_regions(void)
54b318aa GP	115	{
	116	request_region(0x00, 0x20, "dma1");
	117	request_region(0x40, 0x20, "timer");
	118	request_region(0x80, 0x10, "dma page reg");
	119	request_region(0xc0, 0x20, "dma2");
66dc3304 GP	120
66dc3304 GP	121	return 0;
54b318aa	122	}
66dc3304	123	machine_device_initcall(amigaone, request_isa_regions);
54b318aa GP	124
	125	void amigaone_restart(char *cmd)
	126	{
	127	local_irq_disable();
	128
	129	/* Flush and disable caches. */
	130	__flush_disable_L1();
	131
	132	/* Set SRR0 to the reset vector and turn on MSR_IP. */
	133	mtspr(SPRN_SRR0, 0xfff00100);
	134	mtspr(SPRN_SRR1, MSR_IP);
	135
	136	/* Do an rfi to jump back to firmware. */
	137	__asm__ __volatile__("rfi" : : : "memory");
	138
	139	/* Not reached. */
	140	while (1);
	141	}
	142
	143	static int __init amigaone_probe(void)
	144	{
	145	unsigned long root = of_get_flat_dt_root();
	146
	147	if (of_flat_dt_is_compatible(root, "eyetech,amigaone")) {
	148	/*
	149	* Coherent memory access cause complete system lockup! Thus
	150	* disable this CPU feature, even if the CPU needs it.
	151	*/
	152	cur_cpu_spec->cpu_features &= ~CPU_FTR_NEED_COHERENT;
	153
	154	ISA_DMA_THRESHOLD = 0x00ffffff;
	155	DMA_MODE_READ = 0x44;
	156	DMA_MODE_WRITE = 0x48;
	157
	158	return 1;
	159	}
	160
	161	return 0;
	162	}
	163
	164	define_machine(amigaone) {
	165	.name = "AmigaOne",
	166	.probe = amigaone_probe,
	167	.setup_arch = amigaone_setup_arch,
54b318aa GP	168	.show_cpuinfo = amigaone_show_cpuinfo,
	169	.init_IRQ = amigaone_init_IRQ,
	170	.restart = amigaone_restart,
	171	.calibrate_decr = generic_calibrate_decr,
	172	.progress = udbg_progress,
	173	};