[linux-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 struct resource cs5535_mfd_resources[NR_BARS];

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

static struct mfd_cell cs5535_olpc_mfd_cells[] = {
	{
		.name = "olpc-xo1-pm-acpi",
		.num_resources = 1,
		.resources = &cs5535_mfd_resources[ACPI_BAR],
	},
	{
		.name = "olpc-xo1-sci-acpi",
		.num_resources = 1,
		.resources = &cs5535_mfd_resources[ACPI_BAR],
	},
};

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

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

	for (bar = 0; bar < NR_BARS; bar++) {
		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);
	}

	err = pci_request_region(pdev, PMS_BAR, DRV_NAME);
	if (err) {
		dev_err(&pdev->dev, "Failed to request PMS_BAR's IO region\n");
		goto err_disable;
	}

	err = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, cs5535_mfd_cells,
			      ARRAY_SIZE(cs5535_mfd_cells), NULL, 0, NULL);
	if (err) {
		dev_err(&pdev->dev,
			"Failed to add CS5535 sub-devices: %d\n", err);
		goto err_release_pms;
	}

	if (machine_is_olpc()) {
		err = pci_request_region(pdev, ACPI_BAR, DRV_NAME);
		if (err) {
			dev_err(&pdev->dev,
				"Failed to request ACPI_BAR's IO region\n");
			goto err_remove_devices;
		}

		err = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
				      cs5535_olpc_mfd_cells,
				      ARRAY_SIZE(cs5535_olpc_mfd_cells),
				      NULL, 0, NULL);
		if (err) {
			dev_err(&pdev->dev,
				"Failed to add CS5535 OLPC sub-devices: %d\n",
				err);
			goto err_release_acpi;
		}
	}

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

	return 0;

err_release_acpi:
	pci_release_region(pdev, ACPI_BAR);
err_remove_devices:
	mfd_remove_devices(&pdev->dev);
err_release_pms:
	pci_release_region(pdev, PMS_BAR);
err_disable:
	pci_disable_device(pdev);
	return err;
}

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

	if (machine_is_olpc())
		pci_release_region(pdev, ACPI_BAR);

	pci_release_region(pdev, PMS_BAR);
	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
a9e9ce4c	30	static struct resource cs5535_mfd_resources[NR_BARS];
f71e1afd	31
a9e9ce4c	32	static struct mfd_cell cs5535_mfd_cells[] = {
f71e1afd	33	{
f71e1afd AS	34	.name = "cs5535-smb",
	35	.num_resources = 1,
	36	.resources = &cs5535_mfd_resources[SMB_BAR],
	37	},
	38	{
f71e1afd AS	39	.name = "cs5535-gpio",
	40	.num_resources = 1,
	41	.resources = &cs5535_mfd_resources[GPIO_BAR],
	42	},
	43	{
f71e1afd AS	44	.name = "cs5535-mfgpt",
	45	.num_resources = 1,
	46	.resources = &cs5535_mfd_resources[MFGPT_BAR],
	47	},
	48	{
f71e1afd AS	49	.name = "cs5535-pms",
	50	.num_resources = 1,
	51	.resources = &cs5535_mfd_resources[PMS_BAR],
	52	},
99cd1059 LJ	53	};
	54
	55	static struct mfd_cell cs5535_olpc_mfd_cells[] = {
f71e1afd	56	{
99cd1059 LJ	57	.name = "olpc-xo1-pm-acpi",
	58	.num_resources = 1,
	59	.resources = &cs5535_mfd_resources[ACPI_BAR],
	60	},
	61	{
	62	.name = "olpc-xo1-sci-acpi",
f71e1afd AS	63	.num_resources = 1,
	64	.resources = &cs5535_mfd_resources[ACPI_BAR],
	65	},
fd54d65d	66	};
fa1df691	67
f791be49	68	static int cs5535_mfd_probe(struct pci_dev *pdev,
f71e1afd AS	69	const struct pci_device_id *id)
f71e1afd AS	70	{
2129e56e	71	int err, bar;
f71e1afd AS	72
	73	err = pci_enable_device(pdev);
	74	if (err)
	75	return err;
	76
2129e56e	77	for (bar = 0; bar < NR_BARS; bar++) {
f71e1afd AS	78	struct resource *r = &cs5535_mfd_resources[bar];
	79
	80	r->flags = IORESOURCE_IO;
	81	r->start = pci_resource_start(pdev, bar);
	82	r->end = pci_resource_end(pdev, bar);
f71e1afd AS	83	}
f71e1afd AS	84
2d4ba917 LJ	85	err = pci_request_region(pdev, PMS_BAR, DRV_NAME);
	86	if (err) {
	87	dev_err(&pdev->dev, "Failed to request PMS_BAR's IO region\n");
	88	goto err_disable;
	89	}
	90
601e4289	91	err = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, cs5535_mfd_cells,
0848c94f	92	ARRAY_SIZE(cs5535_mfd_cells), NULL, 0, NULL);
f71e1afd	93	if (err) {
601e4289 LJ	94	dev_err(&pdev->dev,
601e4289 LJ	95	"Failed to add CS5535 sub-devices: %d\n", err);
2d4ba917	96	goto err_release_pms;
f71e1afd	97	}
fd54d65d	98
2d4ba917 LJ	99	if (machine_is_olpc()) {
	100	err = pci_request_region(pdev, ACPI_BAR, DRV_NAME);
	101	if (err) {
	102	dev_err(&pdev->dev,
	103	"Failed to request ACPI_BAR's IO region\n");
	104	goto err_remove_devices;
	105	}
	106
99cd1059 LJ	107	err = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE,
	108	cs5535_olpc_mfd_cells,
	109	ARRAY_SIZE(cs5535_olpc_mfd_cells),
	110	NULL, 0, NULL);
2d4ba917	111	if (err) {
99cd1059 LJ	112	dev_err(&pdev->dev,
	113	"Failed to add CS5535 OLPC sub-devices: %d\n",
	114	err);
2d4ba917 LJ	115	goto err_release_acpi;
	116	}
	117	}
f71e1afd	118
816b4580	119	dev_info(&pdev->dev, "%zu devices registered.\n",
f71e1afd AS	120	ARRAY_SIZE(cs5535_mfd_cells));
	121
	122	return 0;
	123
2d4ba917 LJ	124	err_release_acpi:
	125	pci_release_region(pdev, ACPI_BAR);
	126	err_remove_devices:
	127	mfd_remove_devices(&pdev->dev);
	128	err_release_pms:
	129	pci_release_region(pdev, PMS_BAR);
f71e1afd AS	130	err_disable:
	131	pci_disable_device(pdev);
	132	return err;
	133	}
	134
4740f73f	135	static void cs5535_mfd_remove(struct pci_dev *pdev)
f71e1afd AS	136	{
f71e1afd AS	137	mfd_remove_devices(&pdev->dev);
2d4ba917 LJ	138
	139	if (machine_is_olpc())
	140	pci_release_region(pdev, ACPI_BAR);
	141
	142	pci_release_region(pdev, PMS_BAR);
f71e1afd AS	143	pci_disable_device(pdev);
	144	}
	145
36fcd06c	146	static const struct pci_device_id cs5535_mfd_pci_tbl[] = {
f71e1afd AS	147	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) },
	148	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) },
	149	{ 0, }
	150	};
	151	MODULE_DEVICE_TABLE(pci, cs5535_mfd_pci_tbl);
	152
97e43c98	153	static struct pci_driver cs5535_mfd_driver = {
f71e1afd AS	154	.name = DRV_NAME,
	155	.id_table = cs5535_mfd_pci_tbl,
	156	.probe = cs5535_mfd_probe,
84449216	157	.remove = cs5535_mfd_remove,
f71e1afd AS	158	};
f71e1afd AS	159
38a36f5a	160	module_pci_driver(cs5535_mfd_driver);
f71e1afd AS	161
	162	MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>");
	163	MODULE_DESCRIPTION("MFD driver for CS5535/CS5536 southbridge's ISA PCI device");
	164	MODULE_LICENSE("GPL");