[mirror_ubuntu-eoan-kernel.git] / drivers / pci / host / pcie-iproc-platform.c

/*
 * Copyright (C) 2015 Broadcom Corporation
 *
 * 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 version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/clk.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/of_address.h>
#include <linux/of_pci.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/phy/phy.h>

#include "pcie-iproc.h"

static const struct of_device_id iproc_pcie_of_match_table[] = {
	{
		.compatible = "brcm,iproc-pcie",
		.data = (int *)IPROC_PCIE_PAXB,
	}, {
		.compatible = "brcm,iproc-pcie-paxb-v2",
		.data = (int *)IPROC_PCIE_PAXB_V2,
	}, {
		.compatible = "brcm,iproc-pcie-paxc",
		.data = (int *)IPROC_PCIE_PAXC,
	}, {
		.compatible = "brcm,iproc-pcie-paxc-v2",
		.data = (int *)IPROC_PCIE_PAXC_V2,
	},
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);

static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct iproc_pcie *pcie;
	struct device_node *np = dev->of_node;
	struct resource reg;
	resource_size_t iobase = 0;
	LIST_HEAD(resources);
	int ret;

	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
	if (!pcie)
		return -ENOMEM;

	pcie->dev = dev;
	pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev);

	ret = of_address_to_resource(np, 0, &reg);
	if (ret < 0) {
		dev_err(dev, "unable to obtain controller resources\n");
		return ret;
	}

	pcie->base = devm_ioremap(dev, reg.start, resource_size(&reg));
	if (!pcie->base) {
		dev_err(dev, "unable to map controller registers\n");
		return -ENOMEM;
	}
	pcie->base_addr = reg.start;

	if (of_property_read_bool(np, "brcm,pcie-ob")) {
		u32 val;

		ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
					   &val);
		if (ret) {
			dev_err(dev,
				"missing brcm,pcie-ob-axi-offset property\n");
			return ret;
		}
		pcie->ob.axi_offset = val;
		pcie->need_ob_cfg = true;
	}

	/* PHY use is optional */
	pcie->phy = devm_phy_get(dev, "pcie-phy");
	if (IS_ERR(pcie->phy)) {
		if (PTR_ERR(pcie->phy) == -EPROBE_DEFER)
			return -EPROBE_DEFER;
		pcie->phy = NULL;
	}

	ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &resources,
					       &iobase);
	if (ret) {
		dev_err(dev, "unable to get PCI host bridge resources\n");
		return ret;
	}

	/* PAXC doesn't support legacy IRQs, skip mapping */
	switch (pcie->type) {
	case IPROC_PCIE_PAXC:
	case IPROC_PCIE_PAXC_V2:
		break;
	default:
		pcie->map_irq = of_irq_parse_and_map_pci;
	}

	ret = iproc_pcie_setup(pcie, &resources);
	if (ret) {
		dev_err(dev, "PCIe controller setup failed\n");
		pci_free_resource_list(&resources);
		return ret;
	}

	platform_set_drvdata(pdev, pcie);
	return 0;
}

static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
{
	struct iproc_pcie *pcie = platform_get_drvdata(pdev);

	return iproc_pcie_remove(pcie);
}

static struct platform_driver iproc_pcie_pltfm_driver = {
	.driver = {
		.name = "iproc-pcie",
		.of_match_table = of_match_ptr(iproc_pcie_of_match_table),
	},
	.probe = iproc_pcie_pltfm_probe,
	.remove = iproc_pcie_pltfm_remove,
};
module_platform_driver(iproc_pcie_pltfm_driver);

MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
1fb37a81 RJ	1	/*
	2	* Copyright (C) 2015 Broadcom Corporation
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License as
	6	* published by the Free Software Foundation version 2.
	7	*
	8	* This program is distributed "as is" WITHOUT ANY WARRANTY of any
	9	* kind, whether express or implied; without even the implied warranty
	10	* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*/
	13
	14	#include <linux/kernel.h>
	15	#include <linux/pci.h>
	16	#include <linux/clk.h>
	17	#include <linux/module.h>
	18	#include <linux/slab.h>
	19	#include <linux/interrupt.h>
	20	#include <linux/platform_device.h>
	21	#include <linux/of_address.h>
	22	#include <linux/of_pci.h>
	23	#include <linux/of_irq.h>
	24	#include <linux/of_platform.h>
	25	#include <linux/phy/phy.h>
	26
	27	#include "pcie-iproc.h"
	28
943ebae7 RJ	29	static const struct of_device_id iproc_pcie_of_match_table[] = {
	30	{
	31	.compatible = "brcm,iproc-pcie",
	32	.data = (int *)IPROC_PCIE_PAXB,
c7c44527 RJ	33	}, {
	34	.compatible = "brcm,iproc-pcie-paxb-v2",
	35	.data = (int *)IPROC_PCIE_PAXB_V2,
943ebae7 RJ	36	}, {
	37	.compatible = "brcm,iproc-pcie-paxc",
	38	.data = (int *)IPROC_PCIE_PAXC,
787b3c4f RJ	39	}, {
	40	.compatible = "brcm,iproc-pcie-paxc-v2",
	41	.data = (int *)IPROC_PCIE_PAXC_V2,
943ebae7 RJ	42	},
	43	{ /* sentinel */ }
	44	};
	45	MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
	46
1fb37a81 RJ	47	static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
1fb37a81 RJ	48	{
786aeccb	49	struct device *dev = &pdev->dev;
1fb37a81	50	struct iproc_pcie *pcie;
786aeccb	51	struct device_node *np = dev->of_node;
1fb37a81 RJ	52	struct resource reg;
1fb37a81 RJ	53	resource_size_t iobase = 0;
6e347b5e	54	LIST_HEAD(resources);
1fb37a81 RJ	55	int ret;
1fb37a81 RJ	56
786aeccb	57	pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
1fb37a81 RJ	58	if (!pcie)
	59	return -ENOMEM;
	60
786aeccb	61	pcie->dev = dev;
e5c3b3e9	62	pcie->type = (enum iproc_pcie_type) of_device_get_match_data(dev);
1fb37a81 RJ	63
	64	ret = of_address_to_resource(np, 0, &reg);
	65	if (ret < 0) {
786aeccb	66	dev_err(dev, "unable to obtain controller resources\n");
1fb37a81 RJ	67	return ret;
	68	}
	69
786aeccb	70	pcie->base = devm_ioremap(dev, reg.start, resource_size(&reg));
1fb37a81	71	if (!pcie->base) {
786aeccb	72	dev_err(dev, "unable to map controller registers\n");
1fb37a81 RJ	73	return -ENOMEM;
1fb37a81 RJ	74	}
3bc2b234	75	pcie->base_addr = reg.start;
1fb37a81	76
e99a187b RJ	77	if (of_property_read_bool(np, "brcm,pcie-ob")) {
	78	u32 val;
	79
	80	ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
	81	&val);
	82	if (ret) {
786aeccb	83	dev_err(dev,
e99a187b RJ	84	"missing brcm,pcie-ob-axi-offset property\n");
	85	return ret;
	86	}
	87	pcie->ob.axi_offset = val;
e99a187b RJ	88	pcie->need_ob_cfg = true;
	89	}
	90
1fb37a81	91	/* PHY use is optional */
786aeccb	92	pcie->phy = devm_phy_get(dev, "pcie-phy");
1fb37a81 RJ	93	if (IS_ERR(pcie->phy)) {
	94	if (PTR_ERR(pcie->phy) == -EPROBE_DEFER)
	95	return -EPROBE_DEFER;
	96	pcie->phy = NULL;
	97	}
	98
6e347b5e BH	99	ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &resources,
6e347b5e BH	100	&iobase);
1fb37a81	101	if (ret) {
6e347b5e	102	dev_err(dev, "unable to get PCI host bridge resources\n");
1fb37a81 RJ	103	return ret;
	104	}
	105
ffbd7968 AG	106	/* PAXC doesn't support legacy IRQs, skip mapping */
	107	switch (pcie->type) {
	108	case IPROC_PCIE_PAXC:
	109	case IPROC_PCIE_PAXC_V2:
	110	break;
	111	default:
	112	pcie->map_irq = of_irq_parse_and_map_pci;
	113	}
c1e02cea	114
6e347b5e BH	115	ret = iproc_pcie_setup(pcie, &resources);
6e347b5e BH	116	if (ret) {
786aeccb	117	dev_err(dev, "PCIe controller setup failed\n");
6e347b5e BH	118	pci_free_resource_list(&resources);
	119	return ret;
	120	}
ef07991a	121
556c7bb7	122	platform_set_drvdata(pdev, pcie);
6e347b5e	123	return 0;
1fb37a81 RJ	124	}
	125
	126	static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
	127	{
	128	struct iproc_pcie *pcie = platform_get_drvdata(pdev);
	129
	130	return iproc_pcie_remove(pcie);
	131	}
	132
1fb37a81 RJ	133	static struct platform_driver iproc_pcie_pltfm_driver = {
	134	.driver = {
	135	.name = "iproc-pcie",
	136	.of_match_table = of_match_ptr(iproc_pcie_of_match_table),
	137	},
	138	.probe = iproc_pcie_pltfm_probe,
	139	.remove = iproc_pcie_pltfm_remove,
	140	};
	141	module_platform_driver(iproc_pcie_pltfm_driver);
	142
	143	MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
	144	MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
	145	MODULE_LICENSE("GPL v2");