[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / sparc64 / kernel / auxio.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_sbus_set(u8 bits_on, u8 bits_off)
{
	if (auxio_register) {
		unsigned char regval;
		unsigned long flags;
		unsigned char newval;

		spin_lock_irqsave(&auxio_lock, flags);

		regval =  sbus_readb(auxio_register);
		newval =  regval | bits_on;
		newval &= ~bits_off;
		newval &= ~AUXIO_AUX1_MASK;
		sbus_writeb(newval, auxio_register);
		
		spin_unlock_irqrestore(&auxio_lock, flags);
	}
}

static void __auxio_ebus_set(u8 bits_on, u8 bits_off)
{
	if (auxio_register) {
		unsigned char regval;
		unsigned long flags;
		unsigned char newval;

		spin_lock_irqsave(&auxio_lock, flags);

		regval =  (u8)readl(auxio_register);
		newval =  regval | bits_on;
		newval &= ~bits_off;
		writel((u32)newval, auxio_register);

		spin_unlock_irqrestore(&auxio_lock, flags);
	}
}

static inline void __auxio_ebus_set_led(int on)
{
	(on) ? __auxio_ebus_set(AUXIO_PCIO_LED, 0) :
		__auxio_ebus_set(0, AUXIO_PCIO_LED) ;
}

static inline void __auxio_sbus_set_led(int on)
{
	(on) ? __auxio_sbus_set(AUXIO_AUX1_LED, 0) :
		__auxio_sbus_set(0, AUXIO_AUX1_LED) ;
}

void auxio_set_led(int on)
{
	switch(auxio_devtype) {
	case AUXIO_TYPE_SBUS:
		__auxio_sbus_set_led(on);
		break;
	case AUXIO_TYPE_EBUS:
		__auxio_ebus_set_led(on);
		break;
	default:
		break;
	}
}

static inline void __auxio_sbus_set_lte(int on)
{
	(on) ? __auxio_sbus_set(AUXIO_AUX1_LTE, 0) : 
		__auxio_sbus_set(0, AUXIO_AUX1_LTE) ;
}

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;
	}
}

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
	30	static void __auxio_sbus_set(u8 bits_on, u8 bits_off)
	31	{
	32	if (auxio_register) {
	33	unsigned char regval;
	34	unsigned long flags;
	35	unsigned char newval;
	36
	37	spin_lock_irqsave(&auxio_lock, flags);
	38
	39	regval = sbus_readb(auxio_register);
	40	newval = regval \| bits_on;
	41	newval &= ~bits_off;
	42	newval &= ~AUXIO_AUX1_MASK;
	43	sbus_writeb(newval, auxio_register);
	44
	45	spin_unlock_irqrestore(&auxio_lock, flags);
	46	}
	47	}
	48
	49	static void __auxio_ebus_set(u8 bits_on, u8 bits_off)
	50	{
	51	if (auxio_register) {
	52	unsigned char regval;
	53	unsigned long flags;
	54	unsigned char newval;
	55
	56	spin_lock_irqsave(&auxio_lock, flags);
	57
	58	regval = (u8)readl(auxio_register);
	59	newval = regval \| bits_on;
	60	newval &= ~bits_off;
	61	writel((u32)newval, auxio_register);
	62
	63	spin_unlock_irqrestore(&auxio_lock, flags);
	64	}
	65	}
	66
	67	static inline void __auxio_ebus_set_led(int on)
	68	{
	69	(on) ? __auxio_ebus_set(AUXIO_PCIO_LED, 0) :
	70	__auxio_ebus_set(0, AUXIO_PCIO_LED) ;
	71	}
	72
	73	static inline void __auxio_sbus_set_led(int on)
	74	{
	75	(on) ? __auxio_sbus_set(AUXIO_AUX1_LED, 0) :
	76	__auxio_sbus_set(0, AUXIO_AUX1_LED) ;
	77	}
	78
	79	void auxio_set_led(int on)
	80	{
	81	switch(auxio_devtype) {
	82	case AUXIO_TYPE_SBUS:
	83	__auxio_sbus_set_led(on);
84	break;
85	case AUXIO_TYPE_EBUS:
86	__auxio_ebus_set_led(on);
87	break;
88	default:
89	break;
90	}
91	}
92
93	static inline void __auxio_sbus_set_lte(int on)
94	{
95	(on) ? __auxio_sbus_set(AUXIO_AUX1_LTE, 0) :
96	__auxio_sbus_set(0, AUXIO_AUX1_LTE) ;
97	}
98
99	void auxio_set_lte(int on)
100	{
101	switch(auxio_devtype) {
102	case AUXIO_TYPE_SBUS:
103	__auxio_sbus_set_lte(on);
104	break;
105	case AUXIO_TYPE_EBUS:
106	/* FALL-THROUGH */
107	default:
108	break;
109	}
110	}
111
fd098316	112	static struct of_device_id __initdata auxio_match[] = {
b5ba0740 DM	113	{
	114	.name = "auxio",
	115	},
	116	{},
	117	};
	118
	119	MODULE_DEVICE_TABLE(of, auxio_match);
	120
36a59bd8	121	static int __devinit auxio_probe(struct of_device dev, const struct of_device_id match)
b5ba0740	122	{
36a59bd8 DM	123	struct device_node *dp = dev->node;
	124	unsigned long size;
	125
	126	if (!strcmp(dp->parent->name, "ebus")) {
	127	auxio_devtype = AUXIO_TYPE_EBUS;
	128	size = sizeof(u32);
	129	} else if (!strcmp(dp->parent->name, "sbus")) {
	130	auxio_devtype = AUXIO_TYPE_SBUS;
	131	size = 1;
	132	} else {
	133	printk("auxio: Unknown parent bus type [%s]\n",
	134	dp->parent->name);
b5ba0740	135	return -ENODEV;
36a59bd8 DM	136	}
36a59bd8 DM	137	auxio_register = of_ioremap(&dev->resource[0], 0, size, "auxio");
b5ba0740 DM	138	if (!auxio_register)
	139	return -ENODEV;
	140
36a59bd8 DM	141	printk(KERN_INFO "AUXIO: Found device at %s\n",
36a59bd8 DM	142	dp->full_name);
b5ba0740	143
36a59bd8 DM	144	if (auxio_devtype == AUXIO_TYPE_EBUS)
36a59bd8 DM	145	auxio_set_led(AUXIO_LED_ON);
b5ba0740 DM	146
	147	return 0;
	148	}
	149
36a59bd8	150	static struct of_platform_driver auxio_driver = {
b5ba0740	151	.match_table = auxio_match,
36a59bd8	152	.probe = auxio_probe,
a2cd1558 SR	153	.driver = {
	154	.name = "auxio",
	155	},
b5ba0740	156	};
b5ba0740	157
36a59bd8	158	static int __init auxio_init(void)
b5ba0740	159	{
37b7754a	160	return of_register_driver(&auxio_driver, &of_platform_bus_type);
1da177e4	161	}
b5ba0740 DM	162
	163	/* Must be after subsys_initcall() so that busses are probed. Must
	164	* be before device_initcall() because things like the floppy driver
	165	* need to use the AUXIO register.
	166	*/
36a59bd8	167	fs_initcall(auxio_init);