[deliverable/linux.git] / arch / x86 / kernel / scx200_32.c

/*
 *  Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
 *
 *  National Semiconductor SCx200 support.
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/pci.h>

#include <linux/scx200.h>
#include <linux/scx200_gpio.h>

/* Verify that the configuration block really is there */
#define scx200_cb_probe(base) (inw((base) + SCx200_CBA) == (base))

#define NAME "scx200"

MODULE_AUTHOR("Christer Weinigel <wingel@nano-system.com>");
MODULE_DESCRIPTION("NatSemi SCx200 Driver");
MODULE_LICENSE("GPL");

unsigned scx200_gpio_base = 0;
unsigned long scx200_gpio_shadow[2];

unsigned scx200_cb_base = 0;

static struct pci_device_id scx200_tbl[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SCx200_BRIDGE) },
	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_BRIDGE) },
	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SCx200_XBUS)   },
	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_XBUS)   },
	{ },
};
MODULE_DEVICE_TABLE(pci,scx200_tbl);

static int __devinit scx200_probe(struct pci_dev *, const struct pci_device_id *);

static struct pci_driver scx200_pci_driver = {
	.name = "scx200",
	.id_table = scx200_tbl,
	.probe = scx200_probe,
};

static DEFINE_MUTEX(scx200_gpio_config_lock);

static void __devinit scx200_init_shadow(void)
{
	int bank;

	/* read the current values driven on the GPIO signals */
	for (bank = 0; bank < 2; ++bank)
		scx200_gpio_shadow[bank] = inl(scx200_gpio_base + 0x10 * bank);
}

static int __devinit scx200_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	unsigned base;

	if (pdev->device == PCI_DEVICE_ID_NS_SCx200_BRIDGE ||
	    pdev->device == PCI_DEVICE_ID_NS_SC1100_BRIDGE) {
		base = pci_resource_start(pdev, 0);
		printk(KERN_INFO NAME ": GPIO base 0x%x\n", base);

		if (!request_region(base, SCx200_GPIO_SIZE, "NatSemi SCx200 GPIO")) {
			printk(KERN_ERR NAME ": can't allocate I/O for GPIOs\n");
			return -EBUSY;
		}

		scx200_gpio_base = base;
		scx200_init_shadow();

	} else {
		/* find the base of the Configuration Block */
		if (scx200_cb_probe(SCx200_CB_BASE_FIXED)) {
			scx200_cb_base = SCx200_CB_BASE_FIXED;
		} else {
			pci_read_config_dword(pdev, SCx200_CBA_SCRATCH, &base);
			if (scx200_cb_probe(base)) {
				scx200_cb_base = base;
			} else {
				printk(KERN_WARNING NAME ": Configuration Block not found\n");
				return -ENODEV;
			}
		}
		printk(KERN_INFO NAME ": Configuration Block base 0x%x\n", scx200_cb_base);
	}

	return 0;
}

u32 scx200_gpio_configure(unsigned index, u32 mask, u32 bits)
{
	u32 config, new_config;

	mutex_lock(&scx200_gpio_config_lock);

	outl(index, scx200_gpio_base + 0x20);
	config = inl(scx200_gpio_base + 0x24);

	new_config = (config & mask) | bits;
	outl(new_config, scx200_gpio_base + 0x24);

	mutex_unlock(&scx200_gpio_config_lock);

	return config;
}

static int __init scx200_init(void)
{
	printk(KERN_INFO NAME ": NatSemi SCx200 Driver\n");

	return pci_register_driver(&scx200_pci_driver);
}

static void __exit scx200_cleanup(void)
{
	pci_unregister_driver(&scx200_pci_driver);
	release_region(scx200_gpio_base, SCx200_GPIO_SIZE);
}

module_init(scx200_init);
module_exit(scx200_cleanup);

EXPORT_SYMBOL(scx200_gpio_base);
EXPORT_SYMBOL(scx200_gpio_shadow);
EXPORT_SYMBOL(scx200_gpio_configure);
EXPORT_SYMBOL(scx200_cb_base);
Commit	Line	Data
835c34a1 DJ	1	/*
	2	* Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
	3	*
	4	* National Semiconductor SCx200 support.
	5	*/
1da177e4	6
1da177e4 LT	7	#include <linux/module.h>
	8	#include <linux/errno.h>
	9	#include <linux/kernel.h>
	10	#include <linux/init.h>
8bcf6135	11	#include <linux/mutex.h>
1da177e4 LT	12	#include <linux/pci.h>
	13
	14	#include <linux/scx200.h>
cc658cfe	15	#include <linux/scx200_gpio.h>
1da177e4 LT	16
	17	/* Verify that the configuration block really is there */
	18	#define scx200_cb_probe(base) (inw((base) + SCx200_CBA) == (base))
	19
	20	#define NAME "scx200"
	21
	22	MODULE_AUTHOR("Christer Weinigel <wingel@nano-system.com>");
	23	MODULE_DESCRIPTION("NatSemi SCx200 Driver");
	24	MODULE_LICENSE("GPL");
	25
	26	unsigned scx200_gpio_base = 0;
64b33619	27	unsigned long scx200_gpio_shadow[2];
1da177e4 LT	28
	29	unsigned scx200_cb_base = 0;
	30
	31	static struct pci_device_id scx200_tbl[] = {
	32	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SCx200_BRIDGE) },
	33	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_BRIDGE) },
	34	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SCx200_XBUS) },
	35	{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_XBUS) },
	36	{ },
	37	};
	38	MODULE_DEVICE_TABLE(pci,scx200_tbl);
	39
	40	static int __devinit scx200_probe(struct pci_dev , const struct pci_device_id );
	41
	42	static struct pci_driver scx200_pci_driver = {
	43	.name = "scx200",
	44	.id_table = scx200_tbl,
	45	.probe = scx200_probe,
	46	};
	47
8bcf6135	48	static DEFINE_MUTEX(scx200_gpio_config_lock);
1da177e4	49
9b170b8f	50	static void __devinit scx200_init_shadow(void)
1da177e4 LT	51	{
1da177e4 LT	52	int bank;
9b170b8f JC	53
	54	/* read the current values driven on the GPIO signals */
	55	for (bank = 0; bank < 2; ++bank)
	56	scx200_gpio_shadow[bank] = inl(scx200_gpio_base + 0x10 * bank);
	57	}
	58
	59	static int __devinit scx200_probe(struct pci_dev pdev, const struct pci_device_id ent)
	60	{
1da177e4 LT	61	unsigned base;
	62
	63	if (pdev->device == PCI_DEVICE_ID_NS_SCx200_BRIDGE \|\|
	64	pdev->device == PCI_DEVICE_ID_NS_SC1100_BRIDGE) {
	65	base = pci_resource_start(pdev, 0);
	66	printk(KERN_INFO NAME ": GPIO base 0x%x\n", base);
	67
706b7e15	68	if (!request_region(base, SCx200_GPIO_SIZE, "NatSemi SCx200 GPIO")) {
1da177e4 LT	69	printk(KERN_ERR NAME ": can't allocate I/O for GPIOs\n");
	70	return -EBUSY;
	71	}
	72
	73	scx200_gpio_base = base;
9b170b8f	74	scx200_init_shadow();
1da177e4 LT	75
	76	} else {
	77	/* find the base of the Configuration Block */
	78	if (scx200_cb_probe(SCx200_CB_BASE_FIXED)) {
	79	scx200_cb_base = SCx200_CB_BASE_FIXED;
	80	} else {
	81	pci_read_config_dword(pdev, SCx200_CBA_SCRATCH, &base);
	82	if (scx200_cb_probe(base)) {
	83	scx200_cb_base = base;
	84	} else {
	85	printk(KERN_WARNING NAME ": Configuration Block not found\n");
	86	return -ENODEV;
	87	}
	88	}
	89	printk(KERN_INFO NAME ": Configuration Block base 0x%x\n", scx200_cb_base);
	90	}
	91
	92	return 0;
	93	}
	94
55b8c045	95	u32 scx200_gpio_configure(unsigned index, u32 mask, u32 bits)
1da177e4 LT	96	{
1da177e4 LT	97	u32 config, new_config;
1da177e4	98
8bcf6135	99	mutex_lock(&scx200_gpio_config_lock);
1da177e4 LT	100
	101	outl(index, scx200_gpio_base + 0x20);
	102	config = inl(scx200_gpio_base + 0x24);
	103
	104	new_config = (config & mask) \| bits;
	105	outl(new_config, scx200_gpio_base + 0x24);
	106
8bcf6135	107	mutex_unlock(&scx200_gpio_config_lock);
1da177e4 LT	108
	109	return config;
	110	}
	111
1da177e4 LT	112	static int __init scx200_init(void)
	113	{
	114	printk(KERN_INFO NAME ": NatSemi SCx200 Driver\n");
	115
d1d6da8f	116	return pci_register_driver(&scx200_pci_driver);
1da177e4 LT	117	}
	118
	119	static void __exit scx200_cleanup(void)
	120	{
	121	pci_unregister_driver(&scx200_pci_driver);
	122	release_region(scx200_gpio_base, SCx200_GPIO_SIZE);
	123	}
	124
	125	module_init(scx200_init);
	126	module_exit(scx200_cleanup);
	127
	128	EXPORT_SYMBOL(scx200_gpio_base);
	129	EXPORT_SYMBOL(scx200_gpio_shadow);
	130	EXPORT_SYMBOL(scx200_gpio_configure);
	131	EXPORT_SYMBOL(scx200_cb_base);