[deliverable/linux.git] / drivers / mfd / lpc_sch.c

/*
 *  lpc_sch.c - LPC interface for Intel Poulsbo SCH
 *
 *  LPC bridge function of the Intel SCH contains many other
 *  functional units, such as Interrupt controllers, Timers,
 *  Power Management, System Management, GPIO, RTC, and LPC
 *  Configuration Registers.
 *
 *  Copyright (c) 2010 CompuLab Ltd
 *  Author: Denis Turischev <denis@compulab.co.il>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License 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; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 */

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

#define SMBASE		0x40
#define SMBUS_IO_SIZE	64

#define GPIOBASE	0x44
#define GPIO_IO_SIZE	64

static struct resource smbus_sch_resource = {
		.flags = IORESOURCE_IO,
};


static struct resource gpio_sch_resource = {
		.flags = IORESOURCE_IO,
};

static struct mfd_cell lpc_sch_cells[] = {
	{
		.name = "isch_smbus",
		.num_resources = 1,
		.resources = &smbus_sch_resource,
	},
	{
		.name = "sch_gpio",
		.num_resources = 1,
		.resources = &gpio_sch_resource,
	},
};

static struct pci_device_id lpc_sch_ids[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SCH_LPC) },
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ITC_LPC) },
	{ 0, }
};
MODULE_DEVICE_TABLE(pci, lpc_sch_ids);

static int __devinit lpc_sch_probe(struct pci_dev *dev,
				const struct pci_device_id *id)
{
	unsigned int base_addr_cfg;
	unsigned short base_addr;
	int i;

	pci_read_config_dword(dev, SMBASE, &base_addr_cfg);
	if (!(base_addr_cfg & (1 << 31))) {
		dev_err(&dev->dev, "Decode of the SMBus I/O range disabled\n");
		return -ENODEV;
	}
	base_addr = (unsigned short)base_addr_cfg;
	if (base_addr == 0) {
		dev_err(&dev->dev, "I/O space for SMBus uninitialized\n");
		return -ENODEV;
	}

	smbus_sch_resource.start = base_addr;
	smbus_sch_resource.end = base_addr + SMBUS_IO_SIZE - 1;

	pci_read_config_dword(dev, GPIOBASE, &base_addr_cfg);
	if (!(base_addr_cfg & (1 << 31))) {
		dev_err(&dev->dev, "Decode of the GPIO I/O range disabled\n");
		return -ENODEV;
	}
	base_addr = (unsigned short)base_addr_cfg;
	if (base_addr == 0) {
		dev_err(&dev->dev, "I/O space for GPIO uninitialized\n");
		return -ENODEV;
	}

	gpio_sch_resource.start = base_addr;
	gpio_sch_resource.end = base_addr + GPIO_IO_SIZE - 1;

	for (i=0; i < ARRAY_SIZE(lpc_sch_cells); i++)
		lpc_sch_cells[i].id = id->device;

	return mfd_add_devices(&dev->dev, 0,
			lpc_sch_cells, ARRAY_SIZE(lpc_sch_cells), NULL, 0);
}

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

static struct pci_driver lpc_sch_driver = {
	.name		= "lpc_sch",
	.id_table	= lpc_sch_ids,
	.probe		= lpc_sch_probe,
	.remove		= __devexit_p(lpc_sch_remove),
};

static int __init lpc_sch_init(void)
{
	return pci_register_driver(&lpc_sch_driver);
}

static void __exit lpc_sch_exit(void)
{
	pci_unregister_driver(&lpc_sch_driver);
}

module_init(lpc_sch_init);
module_exit(lpc_sch_exit);

MODULE_AUTHOR("Denis Turischev <denis@compulab.co.il>");
MODULE_DESCRIPTION("LPC interface for Intel Poulsbo SCH");
MODULE_LICENSE("GPL");
Commit	Line	Data
e82c60ae DT	1	/*
	2	* lpc_sch.c - LPC interface for Intel Poulsbo SCH
	3	*
	4	* LPC bridge function of the Intel SCH contains many other
	5	* functional units, such as Interrupt controllers, Timers,
	6	* Power Management, System Management, GPIO, RTC, and LPC
	7	* Configuration Registers.
	8	*
	9	* Copyright (c) 2010 CompuLab Ltd
	10	* Author: Denis Turischev <denis@compulab.co.il>
	11	*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License 2 as published
	14	* by the Free Software Foundation.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; see the file COPYING. If not, write to
	23	* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
	24	*/
	25
	26	#include <linux/init.h>
	27	#include <linux/kernel.h>
	28	#include <linux/module.h>
	29	#include <linux/errno.h>
	30	#include <linux/acpi.h>
	31	#include <linux/pci.h>
	32	#include <linux/mfd/core.h>
	33
	34	#define SMBASE 0x40
	35	#define SMBUS_IO_SIZE 64
	36
	37	#define GPIOBASE 0x44
	38	#define GPIO_IO_SIZE 64
	39
	40	static struct resource smbus_sch_resource = {
	41	.flags = IORESOURCE_IO,
	42	};
	43
	44
	45	static struct resource gpio_sch_resource = {
	46	.flags = IORESOURCE_IO,
	47	};
	48
	49	static struct mfd_cell lpc_sch_cells[] = {
	50	{
	51	.name = "isch_smbus",
	52	.num_resources = 1,
	53	.resources = &smbus_sch_resource,
	54	},
	55	{
	56	.name = "sch_gpio",
	57	.num_resources = 1,
	58	.resources = &gpio_sch_resource,
	59	},
	60	};
	61
	62	static struct pci_device_id lpc_sch_ids[] = {
	63	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SCH_LPC) },
e967f77d	64	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ITC_LPC) },
e82c60ae DT	65	{ 0, }
	66	};
	67	MODULE_DEVICE_TABLE(pci, lpc_sch_ids);
	68
	69	static int __devinit lpc_sch_probe(struct pci_dev *dev,
	70	const struct pci_device_id *id)
	71	{
	72	unsigned int base_addr_cfg;
	73	unsigned short base_addr;
e967f77d	74	int i;
e82c60ae DT	75
	76	pci_read_config_dword(dev, SMBASE, &base_addr_cfg);
	77	if (!(base_addr_cfg & (1 << 31))) {
	78	dev_err(&dev->dev, "Decode of the SMBus I/O range disabled\n");
	79	return -ENODEV;
	80	}
	81	base_addr = (unsigned short)base_addr_cfg;
	82	if (base_addr == 0) {
	83	dev_err(&dev->dev, "I/O space for SMBus uninitialized\n");
	84	return -ENODEV;
	85	}
	86
	87	smbus_sch_resource.start = base_addr;
	88	smbus_sch_resource.end = base_addr + SMBUS_IO_SIZE - 1;
	89
	90	pci_read_config_dword(dev, GPIOBASE, &base_addr_cfg);
	91	if (!(base_addr_cfg & (1 << 31))) {
	92	dev_err(&dev->dev, "Decode of the GPIO I/O range disabled\n");
	93	return -ENODEV;
	94	}
	95	base_addr = (unsigned short)base_addr_cfg;
	96	if (base_addr == 0) {
	97	dev_err(&dev->dev, "I/O space for GPIO uninitialized\n");
	98	return -ENODEV;
	99	}
	100
	101	gpio_sch_resource.start = base_addr;
	102	gpio_sch_resource.end = base_addr + GPIO_IO_SIZE - 1;
	103
e967f77d DT	104	for (i=0; i < ARRAY_SIZE(lpc_sch_cells); i++)
	105	lpc_sch_cells[i].id = id->device;
	106
	107	return mfd_add_devices(&dev->dev, 0,
e82c60ae DT	108	lpc_sch_cells, ARRAY_SIZE(lpc_sch_cells), NULL, 0);
	109	}
	110
	111	static void __devexit lpc_sch_remove(struct pci_dev *dev)
	112	{
	113	mfd_remove_devices(&dev->dev);
	114	}
	115
	116	static struct pci_driver lpc_sch_driver = {
	117	.name = "lpc_sch",
	118	.id_table = lpc_sch_ids,
	119	.probe = lpc_sch_probe,
	120	.remove = __devexit_p(lpc_sch_remove),
	121	};
	122
	123	static int __init lpc_sch_init(void)
	124	{
	125	return pci_register_driver(&lpc_sch_driver);
	126	}
	127
	128	static void __exit lpc_sch_exit(void)
	129	{
	130	pci_unregister_driver(&lpc_sch_driver);
	131	}
	132
	133	module_init(lpc_sch_init);
	134	module_exit(lpc_sch_exit);
	135
	136	MODULE_AUTHOR("Denis Turischev <denis@compulab.co.il>");
	137	MODULE_DESCRIPTION("LPC interface for Intel Poulsbo SCH");
	138	MODULE_LICENSE("GPL");