[people/arne_f/kernel.git] / arch / arm / mach-footbridge / ebsa285.c

// SPDX-License-Identifier: GPL-2.0
/*
 * linux/arch/arm/mach-footbridge/ebsa285.c
 *
 * EBSA285 machine fixup
 */
#include <linux/init.h>
#include <linux/io.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/leds.h>

#include <asm/hardware/dec21285.h>
#include <asm/mach-types.h>

#include <asm/mach/arch.h>

#include "common.h"

/* LEDs */
#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
#define XBUS_AMBER_L	BIT(0)
#define XBUS_GREEN_L	BIT(1)
#define XBUS_RED_L	BIT(2)
#define XBUS_TOGGLE	BIT(7)

struct ebsa285_led {
	struct led_classdev     cdev;
	u8                      mask;
};

/*
 * The triggers lines up below will only be used if the
 * LED triggers are compiled in.
 */
static const struct {
	const char *name;
	const char *trigger;
} ebsa285_leds[] = {
	{ "ebsa285:amber", "cpu0", },
	{ "ebsa285:green", "heartbeat", },
	{ "ebsa285:red",},
};

static unsigned char hw_led_state;
static void __iomem *xbus;

static void ebsa285_led_set(struct led_classdev *cdev,
		enum led_brightness b)
{
	struct ebsa285_led *led = container_of(cdev,
			struct ebsa285_led, cdev);

	if (b == LED_OFF)
		hw_led_state |= led->mask;
	else
		hw_led_state &= ~led->mask;
	writeb(hw_led_state, xbus);
}

static enum led_brightness ebsa285_led_get(struct led_classdev *cdev)
{
	struct ebsa285_led *led = container_of(cdev,
			struct ebsa285_led, cdev);

	return hw_led_state & led->mask ? LED_OFF : LED_FULL;
}

static int __init ebsa285_leds_init(void)
{
	int i;

	if (!machine_is_ebsa285())
		return -ENODEV;

	xbus = ioremap(XBUS_CS2, SZ_4K);
	if (!xbus)
		return -ENOMEM;

	/* 3 LEDS all off */
	hw_led_state = XBUS_AMBER_L | XBUS_GREEN_L | XBUS_RED_L;
	writeb(hw_led_state, xbus);

	for (i = 0; i < ARRAY_SIZE(ebsa285_leds); i++) {
		struct ebsa285_led *led;

		led = kzalloc(sizeof(*led), GFP_KERNEL);
		if (!led)
			break;

		led->cdev.name = ebsa285_leds[i].name;
		led->cdev.brightness_set = ebsa285_led_set;
		led->cdev.brightness_get = ebsa285_led_get;
		led->cdev.default_trigger = ebsa285_leds[i].trigger;
		led->mask = BIT(i);

		if (led_classdev_register(NULL, &led->cdev) < 0) {
			kfree(led);
			break;
		}
	}

	return 0;
}

/*
 * Since we may have triggers on any subsystem, defer registration
 * until after subsystem_init.
 */
fs_initcall(ebsa285_leds_init);
#endif

MACHINE_START(EBSA285, "EBSA285")
	/* Maintainer: Russell King */
	.atag_offset	= 0x100,
	.video_start	= 0x000a0000,
	.video_end	= 0x000bffff,
	.map_io		= footbridge_map_io,
	.init_early	= footbridge_sched_clock,
	.init_irq	= footbridge_init_irq,
	.init_time	= footbridge_timer_init,
	.restart	= footbridge_restart,
MACHINE_END
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/*
	3	* linux/arch/arm/mach-footbridge/ebsa285.c
	4	*
	5	* EBSA285 machine fixup
	6	*/
	7	#include <linux/init.h>
43024ed6	8	#include <linux/io.h>
70d13e08	9	#include <linux/spinlock.h>
cf6856d6 BW	10	#include <linux/slab.h>
cf6856d6 BW	11	#include <linux/leds.h>
1da177e4 LT	12
	13	#include <asm/hardware/dec21285.h>
	14	#include <asm/mach-types.h>
	15
	16	#include <asm/mach/arch.h>
	17
	18	#include "common.h"
	19
cf6856d6 BW	20	/* LEDs */
cf6856d6 BW	21	#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
43024ed6 RK	22	#define XBUS_AMBER_L BIT(0)
	23	#define XBUS_GREEN_L BIT(1)
	24	#define XBUS_RED_L BIT(2)
	25	#define XBUS_TOGGLE BIT(7)
	26
cf6856d6 BW	27	struct ebsa285_led {
	28	struct led_classdev cdev;
	29	u8 mask;
	30	};
	31
	32	/*
	33	* The triggers lines up below will only be used if the
	34	* LED triggers are compiled in.
	35	*/
	36	static const struct {
	37	const char *name;
	38	const char *trigger;
	39	} ebsa285_leds[] = {
67130c54 RK	40	{ "ebsa285:amber", "cpu0", },
67130c54 RK	41	{ "ebsa285:green", "heartbeat", },
cf6856d6 BW	42	{ "ebsa285:red",},
	43	};
	44
67130c54	45	static unsigned char hw_led_state;
43024ed6	46	static void __iomem *xbus;
67130c54	47
cf6856d6 BW	48	static void ebsa285_led_set(struct led_classdev *cdev,
	49	enum led_brightness b)
	50	{
	51	struct ebsa285_led *led = container_of(cdev,
	52	struct ebsa285_led, cdev);
	53
67130c54 RK	54	if (b == LED_OFF)
67130c54 RK	55	hw_led_state \|= led->mask;
cf6856d6	56	else
67130c54	57	hw_led_state &= ~led->mask;
43024ed6	58	writeb(hw_led_state, xbus);
cf6856d6 BW	59	}
	60
	61	static enum led_brightness ebsa285_led_get(struct led_classdev *cdev)
	62	{
	63	struct ebsa285_led *led = container_of(cdev,
	64	struct ebsa285_led, cdev);
	65
67130c54	66	return hw_led_state & led->mask ? LED_OFF : LED_FULL;
cf6856d6 BW	67	}
	68
	69	static int __init ebsa285_leds_init(void)
	70	{
	71	int i;
	72
67130c54	73	if (!machine_is_ebsa285())
cf6856d6 BW	74	return -ENODEV;
cf6856d6 BW	75
43024ed6 RK	76	xbus = ioremap(XBUS_CS2, SZ_4K);
	77	if (!xbus)
	78	return -ENOMEM;
	79
67130c54	80	/* 3 LEDS all off */
43024ed6 RK	81	hw_led_state = XBUS_AMBER_L \| XBUS_GREEN_L \| XBUS_RED_L;
43024ed6 RK	82	writeb(hw_led_state, xbus);
cf6856d6 BW	83
	84	for (i = 0; i < ARRAY_SIZE(ebsa285_leds); i++) {
	85	struct ebsa285_led *led;
	86
	87	led = kzalloc(sizeof(*led), GFP_KERNEL);
	88	if (!led)
	89	break;
	90
	91	led->cdev.name = ebsa285_leds[i].name;
	92	led->cdev.brightness_set = ebsa285_led_set;
	93	led->cdev.brightness_get = ebsa285_led_get;
	94	led->cdev.default_trigger = ebsa285_leds[i].trigger;
	95	led->mask = BIT(i);
	96
	97	if (led_classdev_register(NULL, &led->cdev) < 0) {
	98	kfree(led);
	99	break;
	100	}
	101	}
	102
	103	return 0;
	104	}
	105
	106	/*
	107	* Since we may have triggers on any subsystem, defer registration
	108	* until after subsystem_init.
	109	*/
	110	fs_initcall(ebsa285_leds_init);
	111	#endif
	112
1da177e4	113	MACHINE_START(EBSA285, "EBSA285")
e9dea0c6	114	/* Maintainer: Russell King */
93ef8883	115	.atag_offset = 0x100,
e9dea0c6 RK	116	.video_start = 0x000a0000,
	117	.video_end = 0x000bffff,
	118	.map_io = footbridge_map_io,
6cefe92f	119	.init_early = footbridge_sched_clock,
e9dea0c6	120	.init_irq = footbridge_init_irq,
6bb27d73	121	.init_time = footbridge_timer_init,
6fca1e17	122	.restart = footbridge_restart,
1da177e4 LT	123	MACHINE_END
1da177e4 LT	124