[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
#define GPIO_IO_SIZE_CENTERTON	128

#define WDTBASE		0x84
#define WDT_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 resource wdt_sch_resource = {
		.flags = IORESOURCE_IO,
};

static struct mfd_cell tunnelcreek_cells[] = {
	{
		.name = "ie6xx_wdt",
		.num_resources = 1,
		.resources = &wdt_sch_resource,
	},
};

static DEFINE_PCI_DEVICE_TABLE(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) },
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CENTERTON_ILB) },
	{ 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;
	int ret;

	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;

	if (id->device == PCI_DEVICE_ID_INTEL_CENTERTON_ILB)
		gpio_sch_resource.end = base_addr + GPIO_IO_SIZE_CENTERTON - 1;
	else
		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;

	ret = mfd_add_devices(&dev->dev, 0,
			lpc_sch_cells, ARRAY_SIZE(lpc_sch_cells), NULL, 0);
	if (ret)
		goto out_dev;

	if (id->device == PCI_DEVICE_ID_INTEL_ITC_LPC
	 || id->device == PCI_DEVICE_ID_INTEL_CENTERTON_ILB) {
		pci_read_config_dword(dev, WDTBASE, &base_addr_cfg);
		if (!(base_addr_cfg & (1 << 31))) {
			dev_err(&dev->dev, "Decode of the WDT I/O range disabled\n");
			ret = -ENODEV;
			goto out_dev;
		}
		base_addr = (unsigned short)base_addr_cfg;
		if (base_addr == 0) {
			dev_err(&dev->dev, "I/O space for WDT uninitialized\n");
			ret = -ENODEV;
			goto out_dev;
		}

		wdt_sch_resource.start = base_addr;
		wdt_sch_resource.end = base_addr + WDT_IO_SIZE - 1;

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

		ret = mfd_add_devices(&dev->dev, 0, tunnelcreek_cells,
			ARRAY_SIZE(tunnelcreek_cells), NULL, 0);
	}

	return ret;
out_dev:
	mfd_remove_devices(&dev->dev);
	return ret;
}

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),
};

module_pci_driver(lpc_sch_driver);

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
8ee3c2a7	39	#define GPIO_IO_SIZE_CENTERTON 128
e82c60ae	40
19921ef6 AS	41	#define WDTBASE 0x84
	42	#define WDT_IO_SIZE 64
	43
e82c60ae DT	44	static struct resource smbus_sch_resource = {
	45	.flags = IORESOURCE_IO,
	46	};
	47
	48
	49	static struct resource gpio_sch_resource = {
	50	.flags = IORESOURCE_IO,
	51	};
	52
	53	static struct mfd_cell lpc_sch_cells[] = {
	54	{
	55	.name = "isch_smbus",
	56	.num_resources = 1,
	57	.resources = &smbus_sch_resource,
	58	},
	59	{
	60	.name = "sch_gpio",
	61	.num_resources = 1,
	62	.resources = &gpio_sch_resource,
	63	},
	64	};
	65
19921ef6 AS	66	static struct resource wdt_sch_resource = {
	67	.flags = IORESOURCE_IO,
	68	};
	69
	70	static struct mfd_cell tunnelcreek_cells[] = {
	71	{
805b237a	72	.name = "ie6xx_wdt",
19921ef6 AS	73	.num_resources = 1,
	74	.resources = &wdt_sch_resource,
	75	},
	76	};
	77
61485c63	78	static DEFINE_PCI_DEVICE_TABLE(lpc_sch_ids) = {
e82c60ae	79	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SCH_LPC) },
e967f77d	80	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ITC_LPC) },
8ee3c2a7	81	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CENTERTON_ILB) },
e82c60ae DT	82	{ 0, }
	83	};
	84	MODULE_DEVICE_TABLE(pci, lpc_sch_ids);
	85
	86	static int __devinit lpc_sch_probe(struct pci_dev *dev,
	87	const struct pci_device_id *id)
	88	{
	89	unsigned int base_addr_cfg;
	90	unsigned short base_addr;
e967f77d	91	int i;
19921ef6	92	int ret;
e82c60ae DT	93
	94	pci_read_config_dword(dev, SMBASE, &base_addr_cfg);
	95	if (!(base_addr_cfg & (1 << 31))) {
	96	dev_err(&dev->dev, "Decode of the SMBus I/O range disabled\n");
	97	return -ENODEV;
	98	}
	99	base_addr = (unsigned short)base_addr_cfg;
	100	if (base_addr == 0) {
	101	dev_err(&dev->dev, "I/O space for SMBus uninitialized\n");
	102	return -ENODEV;
	103	}
	104
	105	smbus_sch_resource.start = base_addr;
	106	smbus_sch_resource.end = base_addr + SMBUS_IO_SIZE - 1;
	107
	108	pci_read_config_dword(dev, GPIOBASE, &base_addr_cfg);
	109	if (!(base_addr_cfg & (1 << 31))) {
	110	dev_err(&dev->dev, "Decode of the GPIO I/O range disabled\n");
	111	return -ENODEV;
	112	}
	113	base_addr = (unsigned short)base_addr_cfg;
	114	if (base_addr == 0) {
	115	dev_err(&dev->dev, "I/O space for GPIO uninitialized\n");
	116	return -ENODEV;
	117	}
	118
	119	gpio_sch_resource.start = base_addr;
8ee3c2a7 SH	120
	121	if (id->device == PCI_DEVICE_ID_INTEL_CENTERTON_ILB)
	122	gpio_sch_resource.end = base_addr + GPIO_IO_SIZE_CENTERTON - 1;
	123	else
	124	gpio_sch_resource.end = base_addr + GPIO_IO_SIZE - 1;
e82c60ae	125
e967f77d DT	126	for (i=0; i < ARRAY_SIZE(lpc_sch_cells); i++)
	127	lpc_sch_cells[i].id = id->device;
	128
19921ef6	129	ret = mfd_add_devices(&dev->dev, 0,
e82c60ae	130	lpc_sch_cells, ARRAY_SIZE(lpc_sch_cells), NULL, 0);
19921ef6 AS	131	if (ret)
	132	goto out_dev;
	133
8ee3c2a7 SH	134	if (id->device == PCI_DEVICE_ID_INTEL_ITC_LPC
8ee3c2a7 SH	135	\|\| id->device == PCI_DEVICE_ID_INTEL_CENTERTON_ILB) {
19921ef6 AS	136	pci_read_config_dword(dev, WDTBASE, &base_addr_cfg);
	137	if (!(base_addr_cfg & (1 << 31))) {
	138	dev_err(&dev->dev, "Decode of the WDT I/O range disabled\n");
	139	ret = -ENODEV;
	140	goto out_dev;
	141	}
	142	base_addr = (unsigned short)base_addr_cfg;
	143	if (base_addr == 0) {
	144	dev_err(&dev->dev, "I/O space for WDT uninitialized\n");
	145	ret = -ENODEV;
	146	goto out_dev;
	147	}
	148
	149	wdt_sch_resource.start = base_addr;
	150	wdt_sch_resource.end = base_addr + WDT_IO_SIZE - 1;
	151
	152	for (i = 0; i < ARRAY_SIZE(tunnelcreek_cells); i++)
	153	tunnelcreek_cells[i].id = id->device;
	154
	155	ret = mfd_add_devices(&dev->dev, 0, tunnelcreek_cells,
	156	ARRAY_SIZE(tunnelcreek_cells), NULL, 0);
	157	}
	158
	159	return ret;
	160	out_dev:
	161	mfd_remove_devices(&dev->dev);
	162	return ret;
e82c60ae DT	163	}
	164
	165	static void __devexit lpc_sch_remove(struct pci_dev *dev)
	166	{
	167	mfd_remove_devices(&dev->dev);
	168	}
	169
	170	static struct pci_driver lpc_sch_driver = {
	171	.name = "lpc_sch",
	172	.id_table = lpc_sch_ids,
	173	.probe = lpc_sch_probe,
	174	.remove = __devexit_p(lpc_sch_remove),
	175	};
	176
38a36f5a	177	module_pci_driver(lpc_sch_driver);
e82c60ae DT	178
	179	MODULE_AUTHOR("Denis Turischev <denis@compulab.co.il>");
	180	MODULE_DESCRIPTION("LPC interface for Intel Poulsbo SCH");
	181	MODULE_LICENSE("GPL");