[deliverable/linux.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-paxc",
		.data = (int *)IPROC_PCIE_PAXC,
	},
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);

static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
{
	const struct of_device_id *of_id;
	struct iproc_pcie *pcie;
	struct device_node *np = pdev->dev.of_node;
	struct resource reg;
	resource_size_t iobase = 0;
	LIST_HEAD(res);
	int ret;

	of_id = of_match_device(iproc_pcie_of_match_table, &pdev->dev);
	if (!of_id)
		return -EINVAL;

	pcie = devm_kzalloc(&pdev->dev, sizeof(struct iproc_pcie), GFP_KERNEL);
	if (!pcie)
		return -ENOMEM;

	pcie->dev = &pdev->dev;
	pcie->type = (enum iproc_pcie_type)of_id->data;
	platform_set_drvdata(pdev, pcie);

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

	pcie->base = devm_ioremap(pcie->dev, reg.start, resource_size(&reg));
	if (!pcie->base) {
		dev_err(pcie->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(pcie->dev,
				"missing brcm,pcie-ob-axi-offset property\n");
			return ret;
		}
		pcie->ob.axi_offset = val;

		ret = of_property_read_u32(np, "brcm,pcie-ob-window-size",
					   &val);
		if (ret) {
			dev_err(pcie->dev,
				"missing brcm,pcie-ob-window-size property\n");
			return ret;
		}
		pcie->ob.window_size = (resource_size_t)val * SZ_1M;

		if (of_property_read_bool(np, "brcm,pcie-ob-oarr-size"))
			pcie->ob.set_oarr_size = true;

		pcie->need_ob_cfg = true;
	}

	/* PHY use is optional */
	pcie->phy = devm_phy_get(&pdev->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, &res, &iobase);
	if (ret) {
		dev_err(pcie->dev,
			"unable to get PCI host bridge resources\n");
		return ret;
	}

	pcie->map_irq = of_irq_parse_and_map_pci;

	ret = iproc_pcie_setup(pcie, &res);
	if (ret)
		dev_err(pcie->dev, "PCIe controller setup failed\n");

	pci_free_resource_list(&res);

	return ret;
}

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,
	33	}, {
	34	.compatible = "brcm,iproc-pcie-paxc",
	35	.data = (int *)IPROC_PCIE_PAXC,
	36	},
	37	{ /* sentinel */ }
	38	};
	39	MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table);
	40
1fb37a81 RJ	41	static int iproc_pcie_pltfm_probe(struct platform_device *pdev)
1fb37a81 RJ	42	{
943ebae7	43	const struct of_device_id *of_id;
1fb37a81 RJ	44	struct iproc_pcie *pcie;
	45	struct device_node *np = pdev->dev.of_node;
	46	struct resource reg;
	47	resource_size_t iobase = 0;
	48	LIST_HEAD(res);
	49	int ret;
	50
943ebae7 RJ	51	of_id = of_match_device(iproc_pcie_of_match_table, &pdev->dev);
	52	if (!of_id)
	53	return -EINVAL;
	54
1fb37a81 RJ	55	pcie = devm_kzalloc(&pdev->dev, sizeof(struct iproc_pcie), GFP_KERNEL);
	56	if (!pcie)
	57	return -ENOMEM;
	58
	59	pcie->dev = &pdev->dev;
943ebae7	60	pcie->type = (enum iproc_pcie_type)of_id->data;
1fb37a81 RJ	61	platform_set_drvdata(pdev, pcie);
	62
	63	ret = of_address_to_resource(np, 0, &reg);
	64	if (ret < 0) {
	65	dev_err(pcie->dev, "unable to obtain controller resources\n");
	66	return ret;
	67	}
	68
	69	pcie->base = devm_ioremap(pcie->dev, reg.start, resource_size(&reg));
	70	if (!pcie->base) {
	71	dev_err(pcie->dev, "unable to map controller registers\n");
	72	return -ENOMEM;
	73	}
3bc2b234	74	pcie->base_addr = reg.start;
1fb37a81	75
e99a187b RJ	76	if (of_property_read_bool(np, "brcm,pcie-ob")) {
	77	u32 val;
	78
	79	ret = of_property_read_u32(np, "brcm,pcie-ob-axi-offset",
	80	&val);
	81	if (ret) {
	82	dev_err(pcie->dev,
	83	"missing brcm,pcie-ob-axi-offset property\n");
	84	return ret;
	85	}
	86	pcie->ob.axi_offset = val;
	87
	88	ret = of_property_read_u32(np, "brcm,pcie-ob-window-size",
	89	&val);
	90	if (ret) {
	91	dev_err(pcie->dev,
	92	"missing brcm,pcie-ob-window-size property\n");
	93	return ret;
	94	}
	95	pcie->ob.window_size = (resource_size_t)val * SZ_1M;
	96
	97	if (of_property_read_bool(np, "brcm,pcie-ob-oarr-size"))
	98	pcie->ob.set_oarr_size = true;
	99
	100	pcie->need_ob_cfg = true;
	101	}
	102
1fb37a81 RJ	103	/* PHY use is optional */
	104	pcie->phy = devm_phy_get(&pdev->dev, "pcie-phy");
	105	if (IS_ERR(pcie->phy)) {
	106	if (PTR_ERR(pcie->phy) == -EPROBE_DEFER)
	107	return -EPROBE_DEFER;
	108	pcie->phy = NULL;
	109	}
	110
	111	ret = of_pci_get_host_bridge_resources(np, 0, 0xff, &res, &iobase);
	112	if (ret) {
	113	dev_err(pcie->dev,
	114	"unable to get PCI host bridge resources\n");
	115	return ret;
	116	}
	117
c1e02cea HM	118	pcie->map_irq = of_irq_parse_and_map_pci;
c1e02cea HM	119
18c4342a	120	ret = iproc_pcie_setup(pcie, &res);
ef07991a	121	if (ret)
1fb37a81	122	dev_err(pcie->dev, "PCIe controller setup failed\n");
1fb37a81	123
ef07991a HM	124	pci_free_resource_list(&res);
	125
	126	return ret;
1fb37a81 RJ	127	}
	128
	129	static int iproc_pcie_pltfm_remove(struct platform_device *pdev)
	130	{
	131	struct iproc_pcie *pcie = platform_get_drvdata(pdev);
	132
	133	return iproc_pcie_remove(pcie);
	134	}
	135
1fb37a81 RJ	136	static struct platform_driver iproc_pcie_pltfm_driver = {
	137	.driver = {
	138	.name = "iproc-pcie",
	139	.of_match_table = of_match_ptr(iproc_pcie_of_match_table),
	140	},
	141	.probe = iproc_pcie_pltfm_probe,
	142	.remove = iproc_pcie_pltfm_remove,
	143	};
	144	module_platform_driver(iproc_pcie_pltfm_driver);
	145
	146	MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
	147	MODULE_DESCRIPTION("Broadcom iPROC PCIe platform driver");
	148	MODULE_LICENSE("GPL v2");