[mirror_ubuntu-artful-kernel.git] / drivers / mcb / mcb-lpc.c

/*
 * MEN Chameleon Bus.
 *
 * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
 * Author: Andreas Werner <andreas.werner@men.de>
 *
 * 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 of the License.
 */

#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/dmi.h>
#include <linux/mcb.h>
#include <linux/io.h>
#include "mcb-internal.h"

struct priv {
	struct mcb_bus *bus;
	struct resource *mem;
	void __iomem *base;
};

static int mcb_lpc_probe(struct platform_device *pdev)
{
	struct resource *res;
	struct priv *priv;
	int ret = 0;

	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!priv->mem) {
		dev_err(&pdev->dev, "No Memory resource\n");
		return -ENODEV;
	}

	res = devm_request_mem_region(&pdev->dev, priv->mem->start,
				      resource_size(priv->mem),
				      KBUILD_MODNAME);
	if (!res) {
		dev_err(&pdev->dev, "Failed to request IO memory\n");
		return -EBUSY;
	}

	priv->base = devm_ioremap(&pdev->dev, priv->mem->start,
				  resource_size(priv->mem));
	if (!priv->base) {
		dev_err(&pdev->dev, "Cannot ioremap\n");
		return -ENOMEM;
	}

	platform_set_drvdata(pdev, priv);

	priv->bus = mcb_alloc_bus(&pdev->dev);
	if (IS_ERR(priv->bus))
		return PTR_ERR(priv->bus);

	ret = chameleon_parse_cells(priv->bus, priv->mem->start, priv->base);
	if (ret < 0) {
		mcb_release_bus(priv->bus);
		return ret;
	}

	dev_dbg(&pdev->dev, "Found %d cells\n", ret);

	mcb_bus_add_devices(priv->bus);

	return 0;

}

static int mcb_lpc_remove(struct platform_device *pdev)
{
	struct priv *priv = platform_get_drvdata(pdev);

	mcb_release_bus(priv->bus);

	return 0;
}

static struct platform_device *mcb_lpc_pdev;

static int mcb_lpc_create_platform_device(const struct dmi_system_id *id)
{
	struct resource *res = id->driver_data;
	int ret;

	mcb_lpc_pdev = platform_device_alloc("mcb-lpc", -1);
	if (!mcb_lpc_pdev)
		return -ENOMEM;

	ret = platform_device_add_resources(mcb_lpc_pdev, res, 1);
	if (ret)
		goto out_put;

	ret = platform_device_add(mcb_lpc_pdev);
	if (ret)
		goto out_put;

	return 0;

out_put:
	platform_device_put(mcb_lpc_pdev);
	return ret;
}

static struct resource sc24_fpga_resource = {
	.start = 0xe000e000,
	.end = 0xe000e000 + CHAM_HEADER_SIZE,
	.flags = IORESOURCE_MEM,
};

static struct resource sc31_fpga_resource = {
	.start = 0xf000e000,
	.end = 0xf000e000 + CHAM_HEADER_SIZE,
	.flags = IORESOURCE_MEM,
};

static struct platform_driver mcb_lpc_driver = {
	.driver		= {
		.name = "mcb-lpc",
	},
	.probe		= mcb_lpc_probe,
	.remove		= mcb_lpc_remove,
};

static const struct dmi_system_id mcb_lpc_dmi_table[] = {
	{
		.ident = "SC24",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "MEN"),
			DMI_MATCH(DMI_PRODUCT_VERSION, "14SC24"),
		},
		.driver_data = (void *)&sc24_fpga_resource,
		.callback = mcb_lpc_create_platform_device,
	},
	{
		.ident = "SC31",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "MEN"),
			DMI_MATCH(DMI_PRODUCT_VERSION, "14SC31"),
		},
		.driver_data = (void *)&sc31_fpga_resource,
		.callback = mcb_lpc_create_platform_device,
	},
	{}
};
MODULE_DEVICE_TABLE(dmi, mcb_lpc_dmi_table);

static int __init mcb_lpc_init(void)
{
	if (!dmi_check_system(mcb_lpc_dmi_table))
		return -ENODEV;

	return platform_driver_register(&mcb_lpc_driver);
}

static void __exit mcb_lpc_exit(void)
{
	platform_device_unregister(mcb_lpc_pdev);
	platform_driver_unregister(&mcb_lpc_driver);
}

module_init(mcb_lpc_init);
module_exit(mcb_lpc_exit);

MODULE_AUTHOR("Andreas Werner <andreas.werner@men.de>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("MCB over LPC support");
Commit	Line	Data
73edc8f7 AW	1	/*
	2	* MEN Chameleon Bus.
	3	*
	4	* Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
	5	* Author: Andreas Werner <andreas.werner@men.de>
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the Free
	9	* Software Foundation; version 2 of the License.
	10	*/
	11
	12	#include <linux/platform_device.h>
	13	#include <linux/module.h>
	14	#include <linux/dmi.h>
	15	#include <linux/mcb.h>
	16	#include <linux/io.h>
	17	#include "mcb-internal.h"
	18
	19	struct priv {
	20	struct mcb_bus *bus;
	21	struct resource *mem;
	22	void __iomem *base;
	23	};
	24
	25	static int mcb_lpc_probe(struct platform_device *pdev)
	26	{
	27	struct resource *res;
	28	struct priv *priv;
	29	int ret = 0;
	30
	31	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
	32	if (!priv)
	33	return -ENOMEM;
	34
	35	priv->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	36	if (!priv->mem) {
	37	dev_err(&pdev->dev, "No Memory resource\n");
	38	return -ENODEV;
	39	}
	40
	41	res = devm_request_mem_region(&pdev->dev, priv->mem->start,
	42	resource_size(priv->mem),
	43	KBUILD_MODNAME);
	44	if (!res) {
	45	dev_err(&pdev->dev, "Failed to request IO memory\n");
	46	return -EBUSY;
	47	}
	48
	49	priv->base = devm_ioremap(&pdev->dev, priv->mem->start,
	50	resource_size(priv->mem));
	51	if (!priv->base) {
	52	dev_err(&pdev->dev, "Cannot ioremap\n");
	53	return -ENOMEM;
	54	}
	55
	56	platform_set_drvdata(pdev, priv);
	57
	58	priv->bus = mcb_alloc_bus(&pdev->dev);
	59	if (IS_ERR(priv->bus))
	60	return PTR_ERR(priv->bus);
	61
	62	ret = chameleon_parse_cells(priv->bus, priv->mem->start, priv->base);
	63	if (ret < 0) {
	64	mcb_release_bus(priv->bus);
65	return ret;
66	}
67
68	dev_dbg(&pdev->dev, "Found %d cells\n", ret);
69
70	mcb_bus_add_devices(priv->bus);
71
72	return 0;
73
74	}
75
76	static int mcb_lpc_remove(struct platform_device *pdev)
77	{
78	struct priv *priv = platform_get_drvdata(pdev);
79
80	mcb_release_bus(priv->bus);
81
82	return 0;
83	}
84
85	static struct platform_device *mcb_lpc_pdev;
86
87	static int mcb_lpc_create_platform_device(const struct dmi_system_id *id)
88	{
89	struct resource *res = id->driver_data;
90	int ret;
91
92	mcb_lpc_pdev = platform_device_alloc("mcb-lpc", -1);
93	if (!mcb_lpc_pdev)
94	return -ENOMEM;
95
96	ret = platform_device_add_resources(mcb_lpc_pdev, res, 1);
97	if (ret)
98	goto out_put;
99
100	ret = platform_device_add(mcb_lpc_pdev);
101	if (ret)
102	goto out_put;
103
104	return 0;
105
106	out_put:
107	platform_device_put(mcb_lpc_pdev);
108	return ret;
109	}
110
111	static struct resource sc24_fpga_resource = {
112	.start = 0xe000e000,
113	.end = 0xe000e000 + CHAM_HEADER_SIZE,
114	.flags = IORESOURCE_MEM,
115	};
116
3a1f0576 MM	117	static struct resource sc31_fpga_resource = {
	118	.start = 0xf000e000,
	119	.end = 0xf000e000 + CHAM_HEADER_SIZE,
	120	.flags = IORESOURCE_MEM,
	121	};
	122
73edc8f7 AW	123	static struct platform_driver mcb_lpc_driver = {
	124	.driver = {
	125	.name = "mcb-lpc",
	126	},
	127	.probe = mcb_lpc_probe,
	128	.remove = mcb_lpc_remove,
	129	};
	130
	131	static const struct dmi_system_id mcb_lpc_dmi_table[] = {
	132	{
	133	.ident = "SC24",
	134	.matches = {
	135	DMI_MATCH(DMI_SYS_VENDOR, "MEN"),
	136	DMI_MATCH(DMI_PRODUCT_VERSION, "14SC24"),
	137	},
	138	.driver_data = (void *)&sc24_fpga_resource,
	139	.callback = mcb_lpc_create_platform_device,
	140	},
3a1f0576 MM	141	{
	142	.ident = "SC31",
	143	.matches = {
	144	DMI_MATCH(DMI_SYS_VENDOR, "MEN"),
	145	DMI_MATCH(DMI_PRODUCT_VERSION, "14SC31"),
	146	},
	147	.driver_data = (void *)&sc31_fpga_resource,
	148	.callback = mcb_lpc_create_platform_device,
	149	},
73edc8f7 AW	150	{}
	151	};
	152	MODULE_DEVICE_TABLE(dmi, mcb_lpc_dmi_table);
	153
	154	static int __init mcb_lpc_init(void)
	155	{
	156	if (!dmi_check_system(mcb_lpc_dmi_table))
	157	return -ENODEV;
	158
	159	return platform_driver_register(&mcb_lpc_driver);
	160	}
	161
	162	static void __exit mcb_lpc_exit(void)
	163	{
	164	platform_device_unregister(mcb_lpc_pdev);
	165	platform_driver_unregister(&mcb_lpc_driver);
	166	}
	167
	168	module_init(mcb_lpc_init);
	169	module_exit(mcb_lpc_exit);
	170
	171	MODULE_AUTHOR("Andreas Werner <andreas.werner@men.de>");
	172	MODULE_LICENSE("GPL");
	173	MODULE_DESCRIPTION("MCB over LPC support");