[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / powerpc / kernel / of_platform.c

/*
 *    Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
 *			 <benh@kernel.crashing.org>
 *    and		 Arnd Bergmann, IBM Corp.
 *
 *  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.
 *
 */

#undef DEBUG

#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/pci.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>

#include <asm/errno.h>
#include <asm/topology.h>
#include <asm/pci-bridge.h>
#include <asm/ppc-pci.h>
#include <asm/atomic.h>

#ifdef CONFIG_PPC_OF_PLATFORM_PCI

/* The probing of PCI controllers from of_platform is currently
 * 64 bits only, mostly due to gratuitous differences between
 * the 32 and 64 bits PCI code on PowerPC and the 32 bits one
 * lacking some bits needed here.
 */

static int __devinit of_pci_phb_probe(struct platform_device *dev,
				      const struct of_device_id *match)
{
	struct pci_controller *phb;

	/* Check if we can do that ... */
	if (ppc_md.pci_setup_phb == NULL)
		return -ENODEV;

	pr_info("Setting up PCI bus %s\n", dev->dev.of_node->full_name);

	/* Alloc and setup PHB data structure */
	phb = pcibios_alloc_controller(dev->dev.of_node);
	if (!phb)
		return -ENODEV;

	/* Setup parent in sysfs */
	phb->parent = &dev->dev;

	/* Setup the PHB using arch provided callback */
	if (ppc_md.pci_setup_phb(phb)) {
		pcibios_free_controller(phb);
		return -ENODEV;
	}

	/* Process "ranges" property */
	pci_process_bridge_OF_ranges(phb, dev->dev.of_node, 0);

	/* Init pci_dn data structures */
	pci_devs_phb_init_dynamic(phb);

	/* Register devices with EEH */
#ifdef CONFIG_EEH
	if (dev->dev.of_node->child)
		eeh_add_device_tree_early(dev->dev.of_node);
#endif /* CONFIG_EEH */

	/* Scan the bus */
	pcibios_scan_phb(phb, dev->dev.of_node);
	if (phb->bus == NULL)
		return -ENXIO;

	/* Claim resources. This might need some rework as well depending
	 * wether we are doing probe-only or not, like assigning unassigned
	 * resources etc...
	 */
	pcibios_claim_one_bus(phb->bus);

	/* Finish EEH setup */
#ifdef CONFIG_EEH
	eeh_add_device_tree_late(phb->bus);
#endif

	/* Add probed PCI devices to the device model */
	pci_bus_add_devices(phb->bus);

	return 0;
}

static struct of_device_id of_pci_phb_ids[] = {
	{ .type = "pci", },
	{ .type = "pcix", },
	{ .type = "pcie", },
	{ .type = "pciex", },
	{ .type = "ht", },
	{}
};

static struct of_platform_driver of_pci_phb_driver = {
	.probe = of_pci_phb_probe,
	.driver = {
		.name = "of-pci",
		.owner = THIS_MODULE,
		.of_match_table = of_pci_phb_ids,
	},
};

static __init int of_pci_phb_init(void)
{
	return of_register_platform_driver(&of_pci_phb_driver);
}

device_initcall(of_pci_phb_init);

#endif /* CONFIG_PPC_OF_PLATFORM_PCI */
Commit	Line	Data
7eebde70 BH	1	/*
	2	* Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
	3	* <benh@kernel.crashing.org>
4c9d2800	4	* and Arnd Bergmann, IBM Corp.
7eebde70 BH	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the License, or (at your option) any later version.
	10	*
	11	*/
	12
	13	#undef DEBUG
	14
	15	#include <linux/string.h>
	16	#include <linux/kernel.h>
	17	#include <linux/init.h>
	18	#include <linux/module.h>
	19	#include <linux/mod_devicetable.h>
4c9d2800	20	#include <linux/pci.h>
283029d1	21	#include <linux/of.h>
cd6eed37 SR	22	#include <linux/of_device.h>
cd6eed37 SR	23	#include <linux/of_platform.h>
7eebde70 BH	24
7eebde70 BH	25	#include <asm/errno.h>
12d04eef	26	#include <asm/topology.h>
4c9d2800 BH	27	#include <asm/pci-bridge.h>
4c9d2800 BH	28	#include <asm/ppc-pci.h>
9309180f BH	29	#include <asm/atomic.h>
9309180f BH	30
4c9d2800 BH	31	#ifdef CONFIG_PPC_OF_PLATFORM_PCI
	32
	33	/* The probing of PCI controllers from of_platform is currently
	34	* 64 bits only, mostly due to gratuitous differences between
	35	* the 32 and 64 bits PCI code on PowerPC and the 32 bits one
	36	* lacking some bits needed here.
	37	*/
	38
a454dc50	39	static int __devinit of_pci_phb_probe(struct platform_device *dev,
4c9d2800 BH	40	const struct of_device_id *match)
	41	{
	42	struct pci_controller *phb;
	43
	44	/* Check if we can do that ... */
	45	if (ppc_md.pci_setup_phb == NULL)
	46	return -ENODEV;
	47
61c7a080	48	pr_info("Setting up PCI bus %s\n", dev->dev.of_node->full_name);
4c9d2800 BH	49
4c9d2800 BH	50	/* Alloc and setup PHB data structure */
61c7a080	51	phb = pcibios_alloc_controller(dev->dev.of_node);
4c9d2800 BH	52	if (!phb)
	53	return -ENODEV;
	54
	55	/* Setup parent in sysfs */
	56	phb->parent = &dev->dev;
	57
	58	/* Setup the PHB using arch provided callback */
	59	if (ppc_md.pci_setup_phb(phb)) {
	60	pcibios_free_controller(phb);
	61	return -ENODEV;
	62	}
	63
	64	/* Process "ranges" property */
61c7a080	65	pci_process_bridge_OF_ranges(phb, dev->dev.of_node, 0);
4c9d2800	66
4c9d2800 BH	67	/* Init pci_dn data structures */
	68	pci_devs_phb_init_dynamic(phb);
	69
	70	/* Register devices with EEH */
	71	#ifdef CONFIG_EEH
61c7a080 GL	72	if (dev->dev.of_node->child)
61c7a080 GL	73	eeh_add_device_tree_early(dev->dev.of_node);
4c9d2800 BH	74	#endif /* CONFIG_EEH */
	75
	76	/* Scan the bus */
61c7a080	77	pcibios_scan_phb(phb, dev->dev.of_node);
7cfb62a2 IK	78	if (phb->bus == NULL)
7cfb62a2 IK	79	return -ENXIO;
4c9d2800 BH	80
	81	/* Claim resources. This might need some rework as well depending
	82	* wether we are doing probe-only or not, like assigning unassigned
	83	* resources etc...
	84	*/
	85	pcibios_claim_one_bus(phb->bus);
	86
	87	/* Finish EEH setup */
	88	#ifdef CONFIG_EEH
	89	eeh_add_device_tree_late(phb->bus);
	90	#endif
	91
	92	/* Add probed PCI devices to the device model */
	93	pci_bus_add_devices(phb->bus);
	94
	95	return 0;
	96	}
	97
	98	static struct of_device_id of_pci_phb_ids[] = {
	99	{ .type = "pci", },
	100	{ .type = "pcix", },
	101	{ .type = "pcie", },
	102	{ .type = "pciex", },
	103	{ .type = "ht", },
	104	{}
	105	};
	106
	107	static struct of_platform_driver of_pci_phb_driver = {
cd6eed37 SR	108	.probe = of_pci_phb_probe,
	109	.driver = {
	110	.name = "of-pci",
4018294b GL	111	.owner = THIS_MODULE,
4018294b GL	112	.of_match_table = of_pci_phb_ids,
cd6eed37	113	},
4c9d2800 BH	114	};
	115
	116	static __init int of_pci_phb_init(void)
	117	{
	118	return of_register_platform_driver(&of_pci_phb_driver);
	119	}
	120
	121	device_initcall(of_pci_phb_init);
	122
	123	#endif /* CONFIG_PPC_OF_PLATFORM_PCI */