[mirror_ubuntu-bionic-kernel.git] / drivers / mfd / cs5535-mfd.c

/*
 * cs5535-mfd.c - core MFD driver for CS5535/CS5536 southbridges
 *
 * The CS5535 and CS5536 has an ISA bridge on the PCI bus that is
 * used for accessing GPIOs, MFGPTs, ACPI, etc.  Each subdevice has
 * an IO range that's specified in a single BAR.  The BAR order is
 * hardcoded in the CS553x specifications.
 *
 * Copyright (c) 2010  Andres Salomon <dilinger@queued.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/pci.h>

#define DRV_NAME "cs5535-mfd"

enum cs5535_mfd_bars {
	SMB_BAR = 0,
	GPIO_BAR = 1,
	MFGPT_BAR = 2,
	PMS_BAR = 4,
	ACPI_BAR = 5,
	NR_BARS,
};

static int cs5535_mfd_res_enable(struct platform_device *pdev)
{
	struct resource *res;

	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	if (!res) {
		dev_err(&pdev->dev, "can't fetch device resource info\n");
		return -EIO;
	}

	if (!request_region(res->start, resource_size(res), DRV_NAME)) {
		dev_err(&pdev->dev, "can't request region\n");
		return -EIO;
	}

	return 0;
}

static int cs5535_mfd_res_disable(struct platform_device *pdev)
{
	struct resource *res;
	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	if (!res) {
		dev_err(&pdev->dev, "can't fetch device resource info\n");
		return -EIO;
	}

	release_region(res->start, resource_size(res));
	return 0;
}

static __devinitdata struct resource cs5535_mfd_resources[NR_BARS];

static __devinitdata struct mfd_cell cs5535_mfd_cells[] = {
	{
		.id = SMB_BAR,
		.name = "cs5535-smb",
		.num_resources = 1,
		.resources = &cs5535_mfd_resources[SMB_BAR],
	},
	{
		.id = GPIO_BAR,
		.name = "cs5535-gpio",
		.num_resources = 1,
		.resources = &cs5535_mfd_resources[GPIO_BAR],
	},
	{
		.id = MFGPT_BAR,
		.name = "cs5535-mfgpt",
		.num_resources = 1,
		.resources = &cs5535_mfd_resources[MFGPT_BAR],
	},
	{
		.id = PMS_BAR,
		.name = "cs5535-pms",
		.num_resources = 1,
		.resources = &cs5535_mfd_resources[PMS_BAR],

		.enable = cs5535_mfd_res_enable,
		.disable = cs5535_mfd_res_disable,
	},
	{
		.id = ACPI_BAR,
		.name = "cs5535-acpi",
		.num_resources = 1,
		.resources = &cs5535_mfd_resources[ACPI_BAR],

		.enable = cs5535_mfd_res_enable,
		.disable = cs5535_mfd_res_disable,
	},
};

static int __devinit cs5535_mfd_probe(struct pci_dev *pdev,
		const struct pci_device_id *id)
{
	int err, i;

	err = pci_enable_device(pdev);
	if (err)
		return err;

	/* fill in IO range for each cell; subdrivers handle the region */
	for (i = 0; i < ARRAY_SIZE(cs5535_mfd_cells); i++) {
		int bar = cs5535_mfd_cells[i].id;
		struct resource *r = &cs5535_mfd_resources[bar];

		r->flags = IORESOURCE_IO;
		r->start = pci_resource_start(pdev, bar);
		r->end = pci_resource_end(pdev, bar);

		/* id is used for temporarily storing BAR; unset it now */
		cs5535_mfd_cells[i].id = 0;
	}

	err = mfd_add_devices(&pdev->dev, -1, cs5535_mfd_cells,
			ARRAY_SIZE(cs5535_mfd_cells), NULL, 0);
	if (err) {
		dev_err(&pdev->dev, "MFD add devices failed: %d\n", err);
		goto err_disable;
	}

	dev_info(&pdev->dev, "%zu devices registered.\n",
			ARRAY_SIZE(cs5535_mfd_cells));

	return 0;

err_disable:
	pci_disable_device(pdev);
	return err;
}

static void __devexit cs5535_mfd_remove(struct pci_dev *pdev)
{
	mfd_remove_devices(&pdev->dev);
	pci_disable_device(pdev);
}

static struct pci_device_id cs5535_mfd_pci_tbl[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) },
	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) },
	{ 0, }
};
MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl);

static struct pci_driver cs5535_mfd_drv = {
	.name = DRV_NAME,
	.id_table = cs5535_mfd_pci_tbl,
	.probe = cs5535_mfd_probe,
	.remove = __devexit_p(cs5535_mfd_remove),
};

static int __init cs5535_mfd_init(void)
{
	return pci_register_driver(&cs5535_mfd_drv);
}

static void __exit cs5535_mfd_exit(void)
{
	pci_unregister_driver(&cs5535_mfd_drv);
}

module_init(cs5535_mfd_init);
module_exit(cs5535_mfd_exit);

MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>");
MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device");
MODULE_LICENSE("GPL");
Commit	Line	Data
f71e1afd AS	1	/*
	2	* cs5535-mfd.c - core MFD driver for CS5535/CS5536 southbridges
	3	*
	4	* The CS5535 and CS5536 has an ISA bridge on the PCI bus that is
	5	* used for accessing GPIOs, MFGPTs, ACPI, etc. Each subdevice has
	6	* an IO range that's specified in a single BAR. The BAR order is
	7	* hardcoded in the CS553x specifications.
	8	*
	9	* Copyright (c) 2010 Andres Salomon <dilinger@queued.net>
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License version 2 as
	13	* published by the Free Software Foundation.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	23	*/
	24
	25	#include <linux/kernel.h>
	26	#include <linux/init.h>
	27	#include <linux/mfd/core.h>
	28	#include <linux/module.h>
	29	#include <linux/pci.h>
	30
	31	#define DRV_NAME "cs5535-mfd"
	32
	33	enum cs5535_mfd_bars {
	34	SMB_BAR = 0,
	35	GPIO_BAR = 1,
	36	MFGPT_BAR = 2,
	37	PMS_BAR = 4,
	38	ACPI_BAR = 5,
	39	NR_BARS,
	40	};
	41
1310e6d6 AS	42	static int cs5535_mfd_res_enable(struct platform_device *pdev)
	43	{
	44	struct resource *res;
	45
	46	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	47	if (!res) {
	48	dev_err(&pdev->dev, "can't fetch device resource info\n");
	49	return -EIO;
	50	}
	51
	52	if (!request_region(res->start, resource_size(res), DRV_NAME)) {
	53	dev_err(&pdev->dev, "can't request region\n");
	54	return -EIO;
	55	}
	56
	57	return 0;
	58	}
	59
	60	static int cs5535_mfd_res_disable(struct platform_device *pdev)
	61	{
	62	struct resource *res;
	63	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	64	if (!res) {
	65	dev_err(&pdev->dev, "can't fetch device resource info\n");
	66	return -EIO;
	67	}
	68
	69	release_region(res->start, resource_size(res));
	70	return 0;
	71	}
	72
f71e1afd AS	73	static __devinitdata struct resource cs5535_mfd_resources[NR_BARS];
	74
	75	static __devinitdata struct mfd_cell cs5535_mfd_cells[] = {
	76	{
	77	.id = SMB_BAR,
	78	.name = "cs5535-smb",
	79	.num_resources = 1,
	80	.resources = &cs5535_mfd_resources[SMB_BAR],
	81	},
	82	{
	83	.id = GPIO_BAR,
	84	.name = "cs5535-gpio",
	85	.num_resources = 1,
	86	.resources = &cs5535_mfd_resources[GPIO_BAR],
	87	},
	88	{
	89	.id = MFGPT_BAR,
	90	.name = "cs5535-mfgpt",
	91	.num_resources = 1,
	92	.resources = &cs5535_mfd_resources[MFGPT_BAR],
	93	},
	94	{
	95	.id = PMS_BAR,
	96	.name = "cs5535-pms",
	97	.num_resources = 1,
	98	.resources = &cs5535_mfd_resources[PMS_BAR],
1310e6d6 AS	99
	100	.enable = cs5535_mfd_res_enable,
	101	.disable = cs5535_mfd_res_disable,
f71e1afd AS	102	},
	103	{
	104	.id = ACPI_BAR,
	105	.name = "cs5535-acpi",
	106	.num_resources = 1,
	107	.resources = &cs5535_mfd_resources[ACPI_BAR],
1310e6d6 AS	108
	109	.enable = cs5535_mfd_res_enable,
	110	.disable = cs5535_mfd_res_disable,
f71e1afd AS	111	},
	112	};
	113
	114	static int __devinit cs5535_mfd_probe(struct pci_dev *pdev,
	115	const struct pci_device_id *id)
	116	{
	117	int err, i;
	118
	119	err = pci_enable_device(pdev);
	120	if (err)
	121	return err;
	122
	123	/* fill in IO range for each cell; subdrivers handle the region */
	124	for (i = 0; i < ARRAY_SIZE(cs5535_mfd_cells); i++) {
	125	int bar = cs5535_mfd_cells[i].id;
	126	struct resource *r = &cs5535_mfd_resources[bar];
	127
	128	r->flags = IORESOURCE_IO;
	129	r->start = pci_resource_start(pdev, bar);
	130	r->end = pci_resource_end(pdev, bar);
	131
	132	/* id is used for temporarily storing BAR; unset it now */
	133	cs5535_mfd_cells[i].id = 0;
	134	}
	135
	136	err = mfd_add_devices(&pdev->dev, -1, cs5535_mfd_cells,
	137	ARRAY_SIZE(cs5535_mfd_cells), NULL, 0);
	138	if (err) {
	139	dev_err(&pdev->dev, "MFD add devices failed: %d\n", err);
	140	goto err_disable;
	141	}
	142
816b4580	143	dev_info(&pdev->dev, "%zu devices registered.\n",
f71e1afd AS	144	ARRAY_SIZE(cs5535_mfd_cells));
	145
	146	return 0;
	147
	148	err_disable:
	149	pci_disable_device(pdev);
	150	return err;
	151	}
	152
	153	static void __devexit cs5535_mfd_remove(struct pci_dev *pdev)
	154	{
	155	mfd_remove_devices(&pdev->dev);
	156	pci_disable_device(pdev);
	157	}
	158
	159	static struct pci_device_id cs5535_mfd_pci_tbl[] = {
	160	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) },
	161	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) },
	162	{ 0, }
	163	};
	164	MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl);
	165
	166	static struct pci_driver cs5535_mfd_drv = {
	167	.name = DRV_NAME,
	168	.id_table = cs5535_mfd_pci_tbl,
	169	.probe = cs5535_mfd_probe,
	170	.remove = __devexit_p(cs5535_mfd_remove),
	171	};
	172
	173	static int __init cs5535_mfd_init(void)
	174	{
	175	return pci_register_driver(&cs5535_mfd_drv);
	176	}
	177
	178	static void __exit cs5535_mfd_exit(void)
	179	{
	180	pci_unregister_driver(&cs5535_mfd_drv);
	181	}
	182
	183	module_init(cs5535_mfd_init);
	184	module_exit(cs5535_mfd_exit);
	185
	186	MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>");
	187	MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device");
	188	MODULE_LICENSE("GPL");