[linux-2.6-block.git] / drivers / mfd / cs5535-mfd.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * 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>
 */

#include <linux/kernel.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <asm/olpc.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 struct resource cs5535_mfd_resources[NR_BARS];

static 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,
	},
};

#ifdef CONFIG_OLPC
static void cs5535_clone_olpc_cells(void)
{
	static const char *acpi_clones[] = {
		"olpc-xo1-pm-acpi",
		"olpc-xo1-sci-acpi"
	};

	if (!machine_is_olpc())
		return;

	mfd_clone_cell("cs5535-acpi", acpi_clones, ARRAY_SIZE(acpi_clones));
}
#else
static void cs5535_clone_olpc_cells(void) { }
#endif

static int 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, NULL);
	if (err) {
		dev_err(&pdev->dev, "MFD add devices failed: %d\n", err);
		goto err_disable;
	}
	cs5535_clone_olpc_cells();

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

static const 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_driver = {
	.name = DRV_NAME,
	.id_table = cs5535_mfd_pci_tbl,
	.probe = cs5535_mfd_probe,
	.remove = cs5535_mfd_remove,
};

module_pci_driver(cs5535_mfd_driver);

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
82c29810	1	// SPDX-License-Identifier: GPL-2.0-only
f71e1afd AS	2	/*
	3	* cs5535-mfd.c - core MFD driver for CS5535/CS5536 southbridges
	4	*
	5	* The CS5535 and CS5536 has an ISA bridge on the PCI bus that is
	6	* used for accessing GPIOs, MFGPTs, ACPI, etc. Each subdevice has
	7	* an IO range that's specified in a single BAR. The BAR order is
	8	* hardcoded in the CS553x specifications.
	9	*
	10	* Copyright (c) 2010 Andres Salomon <dilinger@queued.net>
f71e1afd AS	11	*/
	12
	13	#include <linux/kernel.h>
f71e1afd AS	14	#include <linux/mfd/core.h>
	15	#include <linux/module.h>
	16	#include <linux/pci.h>
fa1df691	17	#include <asm/olpc.h>
f71e1afd AS	18
	19	#define DRV_NAME "cs5535-mfd"
	20
	21	enum cs5535_mfd_bars {
	22	SMB_BAR = 0,
	23	GPIO_BAR = 1,
	24	MFGPT_BAR = 2,
	25	PMS_BAR = 4,
	26	ACPI_BAR = 5,
	27	NR_BARS,
	28	};
	29
1310e6d6 AS	30	static int cs5535_mfd_res_enable(struct platform_device *pdev)
	31	{
	32	struct resource *res;
	33
	34	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	35	if (!res) {
	36	dev_err(&pdev->dev, "can't fetch device resource info\n");
	37	return -EIO;
	38	}
	39
	40	if (!request_region(res->start, resource_size(res), DRV_NAME)) {
	41	dev_err(&pdev->dev, "can't request region\n");
	42	return -EIO;
	43	}
	44
	45	return 0;
	46	}
	47
	48	static int cs5535_mfd_res_disable(struct platform_device *pdev)
	49	{
	50	struct resource *res;
740c1989	51
1310e6d6 AS	52	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
	53	if (!res) {
	54	dev_err(&pdev->dev, "can't fetch device resource info\n");
	55	return -EIO;
	56	}
	57
	58	release_region(res->start, resource_size(res));
	59	return 0;
	60	}
	61
a9e9ce4c	62	static struct resource cs5535_mfd_resources[NR_BARS];
f71e1afd	63
a9e9ce4c	64	static struct mfd_cell cs5535_mfd_cells[] = {
f71e1afd AS	65	{
	66	.id = SMB_BAR,
	67	.name = "cs5535-smb",
	68	.num_resources = 1,
	69	.resources = &cs5535_mfd_resources[SMB_BAR],
	70	},
	71	{
	72	.id = GPIO_BAR,
	73	.name = "cs5535-gpio",
	74	.num_resources = 1,
	75	.resources = &cs5535_mfd_resources[GPIO_BAR],
	76	},
	77	{
	78	.id = MFGPT_BAR,
	79	.name = "cs5535-mfgpt",
	80	.num_resources = 1,
	81	.resources = &cs5535_mfd_resources[MFGPT_BAR],
	82	},
	83	{
	84	.id = PMS_BAR,
	85	.name = "cs5535-pms",
	86	.num_resources = 1,
	87	.resources = &cs5535_mfd_resources[PMS_BAR],
1310e6d6 AS	88
	89	.enable = cs5535_mfd_res_enable,
	90	.disable = cs5535_mfd_res_disable,
f71e1afd AS	91	},
	92	{
	93	.id = ACPI_BAR,
	94	.name = "cs5535-acpi",
	95	.num_resources = 1,
	96	.resources = &cs5535_mfd_resources[ACPI_BAR],
1310e6d6 AS	97
	98	.enable = cs5535_mfd_res_enable,
	99	.disable = cs5535_mfd_res_disable,
f71e1afd AS	100	},
	101	};
	102
fa1df691	103	#ifdef CONFIG_OLPC
f791be49	104	static void cs5535_clone_olpc_cells(void)
fa1df691	105	{
740c1989 LJ	106	static const char *acpi_clones[] = {
	107	"olpc-xo1-pm-acpi",
	108	"olpc-xo1-sci-acpi"
	109	};
fa1df691 AS	110
	111	if (!machine_is_olpc())
	112	return;
	113
	114	mfd_clone_cell("cs5535-acpi", acpi_clones, ARRAY_SIZE(acpi_clones));
fa1df691 AS	115	}
	116	#else
	117	static void cs5535_clone_olpc_cells(void) { }
	118	#endif
	119
f791be49	120	static int cs5535_mfd_probe(struct pci_dev *pdev,
f71e1afd AS	121	const struct pci_device_id *id)
	122	{
	123	int err, i;
	124
	125	err = pci_enable_device(pdev);
	126	if (err)
	127	return err;
	128
	129	/* fill in IO range for each cell; subdrivers handle the region */
	130	for (i = 0; i < ARRAY_SIZE(cs5535_mfd_cells); i++) {
	131	int bar = cs5535_mfd_cells[i].id;
	132	struct resource *r = &cs5535_mfd_resources[bar];
	133
	134	r->flags = IORESOURCE_IO;
	135	r->start = pci_resource_start(pdev, bar);
	136	r->end = pci_resource_end(pdev, bar);
	137
	138	/* id is used for temporarily storing BAR; unset it now */
	139	cs5535_mfd_cells[i].id = 0;
	140	}
	141
	142	err = mfd_add_devices(&pdev->dev, -1, cs5535_mfd_cells,
0848c94f	143	ARRAY_SIZE(cs5535_mfd_cells), NULL, 0, NULL);
f71e1afd AS	144	if (err) {
	145	dev_err(&pdev->dev, "MFD add devices failed: %d\n", err);
	146	goto err_disable;
	147	}
fa1df691	148	cs5535_clone_olpc_cells();
f71e1afd	149
816b4580	150	dev_info(&pdev->dev, "%zu devices registered.\n",
f71e1afd AS	151	ARRAY_SIZE(cs5535_mfd_cells));
	152
	153	return 0;
	154
	155	err_disable:
	156	pci_disable_device(pdev);
	157	return err;
	158	}
	159
4740f73f	160	static void cs5535_mfd_remove(struct pci_dev *pdev)
f71e1afd AS	161	{
	162	mfd_remove_devices(&pdev->dev);
	163	pci_disable_device(pdev);
	164	}
	165
36fcd06c	166	static const struct pci_device_id cs5535_mfd_pci_tbl[] = {
f71e1afd AS	167	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) },
	168	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) },
	169	{ 0, }
	170	};
	171	MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl);
	172
97e43c98	173	static struct pci_driver cs5535_mfd_driver = {
f71e1afd AS	174	.name = DRV_NAME,
	175	.id_table = cs5535_mfd_pci_tbl,
	176	.probe = cs5535_mfd_probe,
84449216	177	.remove = cs5535_mfd_remove,
f71e1afd AS	178	};
f71e1afd AS	179
38a36f5a	180	module_pci_driver(cs5535_mfd_driver);
f71e1afd AS	181
	182	MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>");
	183	MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device");
	184	MODULE_LICENSE("GPL");