[mirror_ubuntu-artful-kernel.git] / arch / powerpc / platforms / 85xx / stx_gp3.c

/*
 * Based on MPC8560 ADS and arch/ppc stx_gp3 ports
 *
 * Maintained by Kumar Gala (see MAINTAINERS for contact information)
 *
 * Copyright 2008 Freescale Semiconductor Inc.
 *
 * Dan Malek <dan@embeddededge.com>
 * Copyright 2004 Embedded Edge, LLC
 *
 * Copied from mpc8560_ads.c
 * Copyright 2002, 2003 Motorola Inc.
 *
 * Ported to 2.6, Matt Porter <mporter@kernel.crashing.org>
 * Copyright 2004-2005 MontaVista Software, Inc.
 *
 * 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/stddef.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/of_platform.h>

#include <asm/system.h>
#include <asm/time.h>
#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <asm/mpic.h>
#include <asm/prom.h>
#include <mm/mmu_decl.h>
#include <asm/udbg.h>

#include <sysdev/fsl_soc.h>
#include <sysdev/fsl_pci.h>

#ifdef CONFIG_CPM2
#include <asm/cpm2.h>
#include <sysdev/cpm2_pic.h>

static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
{
	struct irq_chip *chip = irq_desc_get_chip(desc);
	int cascade_irq;

	while ((cascade_irq = cpm2_get_irq()) >= 0)
		generic_handle_irq(cascade_irq);

	chip->irq_eoi(&desc->irq_data);
}
#endif /* CONFIG_CPM2 */

static void __init stx_gp3_pic_init(void)
{
	struct mpic *mpic;
	struct resource r;
	struct device_node *np;
#ifdef CONFIG_CPM2
	int irq;
#endif

	np = of_find_node_by_type(NULL, "open-pic");
	if (!np) {
		printk(KERN_ERR "Could not find open-pic node\n");
		return;
	}

	if (of_address_to_resource(np, 0, &r)) {
		printk(KERN_ERR "Could not map mpic register space\n");
		of_node_put(np);
		return;
	}

	mpic = mpic_alloc(np, r.start,
			MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
			0, 256, " OpenPIC  ");
	BUG_ON(mpic == NULL);
	of_node_put(np);

	mpic_init(mpic);

#ifdef CONFIG_CPM2
	/* Setup CPM2 PIC */
	np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
	if (np == NULL) {
		printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
		return;
	}
	irq = irq_of_parse_and_map(np, 0);

	if (irq == NO_IRQ) {
		of_node_put(np);
		printk(KERN_ERR "PIC init: got no IRQ for cpm cascade\n");
		return;
	}

	cpm2_pic_init(np);
	of_node_put(np);
	irq_set_chained_handler(irq, cpm2_cascade);
#endif
}

/*
 * Setup the architecture
 */
static void __init stx_gp3_setup_arch(void)
{
#ifdef CONFIG_PCI
	struct device_node *np;
#endif

	if (ppc_md.progress)
		ppc_md.progress("stx_gp3_setup_arch()", 0);

#ifdef CONFIG_CPM2
	cpm2_reset();
#endif

#ifdef CONFIG_PCI
	for_each_compatible_node(np, "pci", "fsl,mpc8540-pci")
		fsl_add_bridge(np, 1);
#endif
}

static void stx_gp3_show_cpuinfo(struct seq_file *m)
{
	uint pvid, svid, phid1;

	pvid = mfspr(SPRN_PVR);
	svid = mfspr(SPRN_SVR);

	seq_printf(m, "Vendor\t\t: RPC Electronics STx\n");
	seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
	seq_printf(m, "SVR\t\t: 0x%x\n", svid);

	/* Display cpu Pll setting */
	phid1 = mfspr(SPRN_HID1);
	seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
}

static struct of_device_id __initdata of_bus_ids[] = {
	{ .compatible = "simple-bus", },
	{ .compatible = "gianfar", },
	{},
};

static int __init declare_of_platform_devices(void)
{
	of_platform_bus_probe(NULL, of_bus_ids, NULL);

	return 0;
}
machine_device_initcall(stx_gp3, declare_of_platform_devices);

/*
 * Called very early, device-tree isn't unflattened
 */
static int __init stx_gp3_probe(void)
{
	unsigned long root = of_get_flat_dt_root();

	return of_flat_dt_is_compatible(root, "stx,gp3-8560");
}

define_machine(stx_gp3) {
	.name			= "STX GP3",
	.probe			= stx_gp3_probe,
	.setup_arch		= stx_gp3_setup_arch,
	.init_IRQ		= stx_gp3_pic_init,
	.show_cpuinfo		= stx_gp3_show_cpuinfo,
	.get_irq		= mpic_get_irq,
	.restart		= fsl_rstcr_restart,
	.calibrate_decr		= generic_calibrate_decr,
	.progress		= udbg_progress,
};
Commit	Line	Data
77e03a22 KG	1	/*
	2	* Based on MPC8560 ADS and arch/ppc stx_gp3 ports
	3	*
	4	* Maintained by Kumar Gala (see MAINTAINERS for contact information)
	5	*
	6	* Copyright 2008 Freescale Semiconductor Inc.
	7	*
	8	* Dan Malek <dan@embeddededge.com>
	9	* Copyright 2004 Embedded Edge, LLC
	10	*
	11	* Copied from mpc8560_ads.c
	12	* Copyright 2002, 2003 Motorola Inc.
	13	*
	14	* Ported to 2.6, Matt Porter <mporter@kernel.crashing.org>
	15	* Copyright 2004-2005 MontaVista Software, Inc.
	16	*
	17	* This program is free software; you can redistribute it and/or modify it
	18	* under the terms of the GNU General Public License as published by the
	19	* Free Software Foundation; either version 2 of the License, or (at your
	20	* option) any later version.
	21	*/
	22
	23	#include <linux/stddef.h>
	24	#include <linux/kernel.h>
	25	#include <linux/pci.h>
	26	#include <linux/kdev_t.h>
	27	#include <linux/delay.h>
	28	#include <linux/seq_file.h>
	29	#include <linux/of_platform.h>
	30
	31	#include <asm/system.h>
	32	#include <asm/time.h>
	33	#include <asm/machdep.h>
	34	#include <asm/pci-bridge.h>
	35	#include <asm/mpic.h>
	36	#include <asm/prom.h>
	37	#include <mm/mmu_decl.h>
	38	#include <asm/udbg.h>
	39
	40	#include <sysdev/fsl_soc.h>
	41	#include <sysdev/fsl_pci.h>
	42
	43	#ifdef CONFIG_CPM2
	44	#include <asm/cpm2.h>
	45	#include <sysdev/cpm2_pic.h>
	46
	47	static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
	48	{
ec775d0e	49	struct irq_chip *chip = irq_desc_get_chip(desc);
77e03a22 KG	50	int cascade_irq;
	51
	52	while ((cascade_irq = cpm2_get_irq()) >= 0)
	53	generic_handle_irq(cascade_irq);
	54
712d5d79	55	chip->irq_eoi(&desc->irq_data);
77e03a22 KG	56	}
	57	#endif /* CONFIG_CPM2 */
	58
	59	static void __init stx_gp3_pic_init(void)
	60	{
	61	struct mpic *mpic;
	62	struct resource r;
	63	struct device_node *np;
	64	#ifdef CONFIG_CPM2
	65	int irq;
	66	#endif
	67
	68	np = of_find_node_by_type(NULL, "open-pic");
	69	if (!np) {
	70	printk(KERN_ERR "Could not find open-pic node\n");
	71	return;
	72	}
	73
	74	if (of_address_to_resource(np, 0, &r)) {
	75	printk(KERN_ERR "Could not map mpic register space\n");
	76	of_node_put(np);
	77	return;
	78	}
	79
	80	mpic = mpic_alloc(np, r.start,
	81	MPIC_PRIMARY \| MPIC_WANTS_RESET \| MPIC_BIG_ENDIAN,
	82	0, 256, " OpenPIC ");
	83	BUG_ON(mpic == NULL);
	84	of_node_put(np);
	85
	86	mpic_init(mpic);
	87
	88	#ifdef CONFIG_CPM2
	89	/* Setup CPM2 PIC */
	90	np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
	91	if (np == NULL) {
	92	printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
	93	return;
	94	}
	95	irq = irq_of_parse_and_map(np, 0);
	96
	97	if (irq == NO_IRQ) {
	98	of_node_put(np);
	99	printk(KERN_ERR "PIC init: got no IRQ for cpm cascade\n");
	100	return;
	101	}
	102
	103	cpm2_pic_init(np);
	104	of_node_put(np);
ec775d0e	105	irq_set_chained_handler(irq, cpm2_cascade);
77e03a22 KG	106	#endif
	107	}
	108
	109	/*
	110	* Setup the architecture
	111	*/
	112	static void __init stx_gp3_setup_arch(void)
	113	{
	114	#ifdef CONFIG_PCI
	115	struct device_node *np;
	116	#endif
	117
	118	if (ppc_md.progress)
	119	ppc_md.progress("stx_gp3_setup_arch()", 0);
	120
	121	#ifdef CONFIG_CPM2
	122	cpm2_reset();
	123	#endif
	124
	125	#ifdef CONFIG_PCI
	126	for_each_compatible_node(np, "pci", "fsl,mpc8540-pci")
	127	fsl_add_bridge(np, 1);
	128	#endif
	129	}
	130
	131	static void stx_gp3_show_cpuinfo(struct seq_file *m)
	132	{
	133	uint pvid, svid, phid1;
77e03a22 KG	134
	135	pvid = mfspr(SPRN_PVR);
	136	svid = mfspr(SPRN_SVR);
	137
8354be9c	138	seq_printf(m, "Vendor\t\t: RPC Electronics STx\n");
77e03a22 KG	139	seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
	140	seq_printf(m, "SVR\t\t: 0x%x\n", svid);
	141
	142	/* Display cpu Pll setting */
	143	phid1 = mfspr(SPRN_HID1);
	144	seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
77e03a22 KG	145	}
	146
	147	static struct of_device_id __initdata of_bus_ids[] = {
77e03a22	148	{ .compatible = "simple-bus", },
84ba4a58	149	{ .compatible = "gianfar", },
77e03a22 KG	150	{},
	151	};
	152
	153	static int __init declare_of_platform_devices(void)
	154	{
	155	of_platform_bus_probe(NULL, of_bus_ids, NULL);
	156
	157	return 0;
	158	}
	159	machine_device_initcall(stx_gp3, declare_of_platform_devices);
	160
	161	/*
	162	* Called very early, device-tree isn't unflattened
	163	*/
	164	static int __init stx_gp3_probe(void)
	165	{
	166	unsigned long root = of_get_flat_dt_root();
	167
	168	return of_flat_dt_is_compatible(root, "stx,gp3-8560");
	169	}
	170
	171	define_machine(stx_gp3) {
	172	.name = "STX GP3",
	173	.probe = stx_gp3_probe,
	174	.setup_arch = stx_gp3_setup_arch,
	175	.init_IRQ = stx_gp3_pic_init,
	176	.show_cpuinfo = stx_gp3_show_cpuinfo,
	177	.get_irq = mpic_get_irq,
	178	.restart = fsl_rstcr_restart,
	179	.calibrate_decr = generic_calibrate_decr,
	180	.progress = udbg_progress,
	181	};