[net-next-2.6.git] / arch / sparc / kernel / auxio_64.c

/* auxio.c: Probing for the Sparc AUXIO register at boot time.
 *
 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
 *
 * Refactoring for unified NCR/PCIO support 2002 Eric Brower (ebrower@usa.net)
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/of_device.h>

#include <asm/prom.h>
#include <asm/io.h>
#include <asm/auxio.h>

void __iomem *auxio_register = NULL;
EXPORT_SYMBOL(auxio_register);

enum auxio_type {
	AUXIO_TYPE_NODEV,
	AUXIO_TYPE_SBUS,
	AUXIO_TYPE_EBUS
};

static enum auxio_type auxio_devtype = AUXIO_TYPE_NODEV;
static DEFINE_SPINLOCK(auxio_lock);

static void __auxio_rmw(u8 bits_on, u8 bits_off, int ebus)
{
	if (auxio_register) {
		unsigned long flags;
		u8 regval, newval;

		spin_lock_irqsave(&auxio_lock, flags);

		regval = (ebus ?
			  (u8) readl(auxio_register) :
			  sbus_readb(auxio_register));
		newval =  regval | bits_on;
		newval &= ~bits_off;
		if (!ebus)
			newval &= ~AUXIO_AUX1_MASK;
		if (ebus)
			writel((u32) newval, auxio_register);
		else
			sbus_writeb(newval, auxio_register);
		
		spin_unlock_irqrestore(&auxio_lock, flags);
	}
}

static void __auxio_set_bit(u8 bit, int on, int ebus)
{
	u8 bits_on = (ebus ? AUXIO_PCIO_LED : AUXIO_AUX1_LED);
	u8 bits_off = 0;

	if (!on) {
		u8 tmp = bits_off;
		bits_off = bits_on;
		bits_on = tmp;
	}
	__auxio_rmw(bits_on, bits_off, ebus);
}

void auxio_set_led(int on)
{
	int ebus = auxio_devtype == AUXIO_TYPE_EBUS;
	u8 bit;

	bit = (ebus ? AUXIO_PCIO_LED : AUXIO_AUX1_LED);
	__auxio_set_bit(bit, on, ebus);
}
EXPORT_SYMBOL(auxio_set_led);

static void __auxio_sbus_set_lte(int on)
{
	__auxio_set_bit(AUXIO_AUX1_LTE, on, 0);
}

void auxio_set_lte(int on)
{
	switch(auxio_devtype) {
	case AUXIO_TYPE_SBUS:
		__auxio_sbus_set_lte(on);
		break;
	case AUXIO_TYPE_EBUS:
		/* FALL-THROUGH */
	default:
		break;
	}
}
EXPORT_SYMBOL(auxio_set_lte);

static struct of_device_id __initdata auxio_match[] = {
	{
		.name = "auxio",
	},
	{},
};

MODULE_DEVICE_TABLE(of, auxio_match);

static int __devinit auxio_probe(struct of_device *dev, const struct of_device_id *match)
{
	struct device_node *dp = dev->node;
	unsigned long size;

	if (!strcmp(dp->parent->name, "ebus")) {
		auxio_devtype = AUXIO_TYPE_EBUS;
		size = sizeof(u32);
	} else if (!strcmp(dp->parent->name, "sbus")) {
		auxio_devtype = AUXIO_TYPE_SBUS;
		size = 1;
	} else {
		printk("auxio: Unknown parent bus type [%s]\n",
		       dp->parent->name);
		return -ENODEV;
	}
	auxio_register = of_ioremap(&dev->resource[0], 0, size, "auxio");
	if (!auxio_register)
		return -ENODEV;

	printk(KERN_INFO "AUXIO: Found device at %s\n",
	       dp->full_name);

	if (auxio_devtype == AUXIO_TYPE_EBUS)
		auxio_set_led(AUXIO_LED_ON);

	return 0;
}

static struct of_platform_driver auxio_driver = {
	.match_table	= auxio_match,
	.probe		= auxio_probe,
	.driver		= {
		.name	= "auxio",
	},
};

static int __init auxio_init(void)
{
	return of_register_driver(&auxio_driver, &of_platform_bus_type);
}

/* Must be after subsys_initcall() so that busses are probed.  Must
 * be before device_initcall() because things like the floppy driver
 * need to use the AUXIO register.
 */
fs_initcall(auxio_init);
Commit	Line	Data
1da177e4 LT	1	/* auxio.c: Probing for the Sparc AUXIO register at boot time.
	2	*
	3	* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
	4	*
	5	* Refactoring for unified NCR/PCIO support 2002 Eric Brower (ebrower@usa.net)
	6	*/
	7
dda9beb4	8	#include <linux/module.h>
1da177e4 LT	9	#include <linux/kernel.h>
	10	#include <linux/init.h>
	11	#include <linux/ioport.h>
764f2579	12	#include <linux/of_device.h>
1da177e4	13
f2ad06a2	14	#include <asm/prom.h>
1da177e4	15	#include <asm/io.h>
1da177e4 LT	16	#include <asm/auxio.h>
1da177e4 LT	17
1da177e4	18	void __iomem *auxio_register = NULL;
dda9beb4	19	EXPORT_SYMBOL(auxio_register);
1da177e4 LT	20
	21	enum auxio_type {
	22	AUXIO_TYPE_NODEV,
	23	AUXIO_TYPE_SBUS,
	24	AUXIO_TYPE_EBUS
	25	};
	26
	27	static enum auxio_type auxio_devtype = AUXIO_TYPE_NODEV;
	28	static DEFINE_SPINLOCK(auxio_lock);
	29
86821d18	30	static void __auxio_rmw(u8 bits_on, u8 bits_off, int ebus)
1da177e4 LT	31	{
1da177e4 LT	32	if (auxio_register) {
1da177e4	33	unsigned long flags;
86821d18	34	u8 regval, newval;
1da177e4 LT	35
	36	spin_lock_irqsave(&auxio_lock, flags);
	37
86821d18 DM	38	regval = (ebus ?
	39	(u8) readl(auxio_register) :
	40	sbus_readb(auxio_register));
1da177e4 LT	41	newval = regval \| bits_on;
1da177e4 LT	42	newval &= ~bits_off;
86821d18 DM	43	if (!ebus)
	44	newval &= ~AUXIO_AUX1_MASK;
	45	if (ebus)
	46	writel((u32) newval, auxio_register);
	47	else
	48	sbus_writeb(newval, auxio_register);
1da177e4 LT	49
	50	spin_unlock_irqrestore(&auxio_lock, flags);
	51	}
	52	}
	53
86821d18	54	static void __auxio_set_bit(u8 bit, int on, int ebus)
1da177e4	55	{
86821d18 DM	56	u8 bits_on = (ebus ? AUXIO_PCIO_LED : AUXIO_AUX1_LED);
86821d18 DM	57	u8 bits_off = 0;
1da177e4	58
86821d18 DM	59	if (!on) {
	60	u8 tmp = bits_off;
	61	bits_off = bits_on;
	62	bits_on = tmp;
1da177e4	63	}
86821d18	64	__auxio_rmw(bits_on, bits_off, ebus);
1da177e4 LT	65	}
	66
	67	void auxio_set_led(int on)
	68	{
86821d18 DM	69	int ebus = auxio_devtype == AUXIO_TYPE_EBUS;
	70	u8 bit;
	71
	72	bit = (ebus ? AUXIO_PCIO_LED : AUXIO_AUX1_LED);
	73	__auxio_set_bit(bit, on, ebus);
1da177e4	74	}
917c3660	75	EXPORT_SYMBOL(auxio_set_led);
1da177e4	76
86821d18	77	static void __auxio_sbus_set_lte(int on)
1da177e4	78	{
86821d18	79	__auxio_set_bit(AUXIO_AUX1_LTE, on, 0);
1da177e4 LT	80	}
	81
	82	void auxio_set_lte(int on)
	83	{
	84	switch(auxio_devtype) {
	85	case AUXIO_TYPE_SBUS:
	86	__auxio_sbus_set_lte(on);
	87	break;
	88	case AUXIO_TYPE_EBUS:
	89	/* FALL-THROUGH */
	90	default:
	91	break;
	92	}
	93	}
917c3660	94	EXPORT_SYMBOL(auxio_set_lte);
1da177e4	95
fd098316	96	static struct of_device_id __initdata auxio_match[] = {
b5ba0740 DM	97	{
	98	.name = "auxio",
	99	},
	100	{},
	101	};
	102
	103	MODULE_DEVICE_TABLE(of, auxio_match);
	104
36a59bd8	105	static int __devinit auxio_probe(struct of_device dev, const struct of_device_id match)
b5ba0740	106	{
36a59bd8 DM	107	struct device_node *dp = dev->node;
	108	unsigned long size;
	109
	110	if (!strcmp(dp->parent->name, "ebus")) {
	111	auxio_devtype = AUXIO_TYPE_EBUS;
	112	size = sizeof(u32);
	113	} else if (!strcmp(dp->parent->name, "sbus")) {
	114	auxio_devtype = AUXIO_TYPE_SBUS;
	115	size = 1;
	116	} else {
	117	printk("auxio: Unknown parent bus type [%s]\n",
	118	dp->parent->name);
b5ba0740	119	return -ENODEV;
36a59bd8 DM	120	}
36a59bd8 DM	121	auxio_register = of_ioremap(&dev->resource[0], 0, size, "auxio");
b5ba0740 DM	122	if (!auxio_register)
	123	return -ENODEV;
	124
36a59bd8 DM	125	printk(KERN_INFO "AUXIO: Found device at %s\n",
36a59bd8 DM	126	dp->full_name);
b5ba0740	127
36a59bd8 DM	128	if (auxio_devtype == AUXIO_TYPE_EBUS)
36a59bd8 DM	129	auxio_set_led(AUXIO_LED_ON);
b5ba0740 DM	130
	131	return 0;
	132	}
	133
36a59bd8	134	static struct of_platform_driver auxio_driver = {
b5ba0740	135	.match_table = auxio_match,
36a59bd8	136	.probe = auxio_probe,
a2cd1558 SR	137	.driver = {
	138	.name = "auxio",
	139	},
b5ba0740	140	};
b5ba0740	141
36a59bd8	142	static int __init auxio_init(void)
b5ba0740	143	{
37b7754a	144	return of_register_driver(&auxio_driver, &of_platform_bus_type);
1da177e4	145	}
b5ba0740 DM	146
	147	/* Must be after subsys_initcall() so that busses are probed. Must
	148	* be before device_initcall() because things like the floppy driver
	149	* need to use the AUXIO register.
	150	*/
36a59bd8	151	fs_initcall(auxio_init);