[net-next-2.6.git] / drivers / macintosh / via-pmu-led.c

/*
 * via-pmu LED class device
 *
 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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, GOOD TITLE or
 * NON INFRINGEMENT.  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; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 *
 */
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/leds.h>
#include <linux/adb.h>
#include <linux/pmu.h>
#include <asm/prom.h>

static spinlock_t pmu_blink_lock;
static struct adb_request pmu_blink_req;
/* -1: no change, 0: request off, 1: request on */
static int requested_change;
static int sleeping;

static void pmu_req_done(struct adb_request * req)
{
	unsigned long flags;

	spin_lock_irqsave(&pmu_blink_lock, flags);
	/* if someone requested a change in the meantime
	 * (we only see the last one which is fine)
	 * then apply it now */
	if (requested_change != -1 && !sleeping)
		pmu_request(&pmu_blink_req, NULL, 4, 0xee, 4, 0, requested_change);
	/* reset requested change */
	requested_change = -1;
	spin_unlock_irqrestore(&pmu_blink_lock, flags);
}

static void pmu_led_set(struct led_classdev *led_cdev,
			enum led_brightness brightness)
{
	unsigned long flags;

	spin_lock_irqsave(&pmu_blink_lock, flags);
	switch (brightness) {
	case LED_OFF:
		requested_change = 0;
		break;
	case LED_FULL:
		requested_change = 1;
		break;
	default:
		goto out;
		break;
	}
	/* if request isn't done, then don't do anything */
	if (pmu_blink_req.complete && !sleeping)
		pmu_request(&pmu_blink_req, NULL, 4, 0xee, 4, 0, requested_change);
 out:
 	spin_unlock_irqrestore(&pmu_blink_lock, flags);
}

static struct led_classdev pmu_led = {
	.name = "pmu-front-led",
#ifdef CONFIG_BLK_DEV_IDE_PMAC_BLINK
	.default_trigger = "ide-disk",
#endif
	.brightness_set = pmu_led_set,
};

#ifdef CONFIG_PM
static int pmu_led_sleep_call(struct pmu_sleep_notifier *self, int when)
{
	unsigned long flags;

	spin_lock_irqsave(&pmu_blink_lock, flags);

	switch (when) {
	case PBOOK_SLEEP_REQUEST:
		sleeping = 1;
		break;
	case PBOOK_WAKE:
		sleeping = 0;
		break;
	default:
		/* do nothing */
		break;
	}
	spin_unlock_irqrestore(&pmu_blink_lock, flags);

	return PBOOK_SLEEP_OK;
}

static struct pmu_sleep_notifier via_pmu_led_sleep_notif = {
	.notifier_call = pmu_led_sleep_call,
};
#endif

static int __init via_pmu_led_init(void)
{
	struct device_node *dt;
	const char *model;

	/* only do this on keylargo based models */
	if (pmu_get_model() != PMU_KEYLARGO_BASED)
		return -ENODEV;

	dt = of_find_node_by_path("/");
	if (dt == NULL)
		return -ENODEV;
	model = (const char *)get_property(dt, "model", NULL);
	if (model == NULL)
		return -ENODEV;
	if (strncmp(model, "PowerBook", strlen("PowerBook")) != 0 &&
	    strncmp(model, "iBook", strlen("iBook")) != 0) {
		of_node_put(dt);
		/* ignore */
		return -ENODEV;
	}
	of_node_put(dt);

	spin_lock_init(&pmu_blink_lock);
	/* no outstanding req */
	pmu_blink_req.complete = 1;
	pmu_blink_req.done = pmu_req_done;
#ifdef CONFIG_PM
	pmu_register_sleep_notifier(&via_pmu_led_sleep_notif);
#endif
	return led_classdev_register(NULL, &pmu_led);
}

late_initcall(via_pmu_led_init);
Commit	Line	Data
70c3967d JB	1	/*
	2	* via-pmu LED class device
	3	*
	4	* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
	14	* NON INFRINGEMENT. See the GNU General Public License for more
	15	* details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	20	*
	21	*/
	22	#include <linux/types.h>
	23	#include <linux/kernel.h>
	24	#include <linux/device.h>
	25	#include <linux/leds.h>
	26	#include <linux/adb.h>
	27	#include <linux/pmu.h>
	28	#include <asm/prom.h>
	29
	30	static spinlock_t pmu_blink_lock;
	31	static struct adb_request pmu_blink_req;
	32	/* -1: no change, 0: request off, 1: request on */
	33	static int requested_change;
	34	static int sleeping;
	35
	36	static void pmu_req_done(struct adb_request * req)
	37	{
	38	unsigned long flags;
	39
	40	spin_lock_irqsave(&pmu_blink_lock, flags);
	41	/* if someone requested a change in the meantime
	42	* (we only see the last one which is fine)
	43	* then apply it now */
	44	if (requested_change != -1 && !sleeping)
	45	pmu_request(&pmu_blink_req, NULL, 4, 0xee, 4, 0, requested_change);
	46	/* reset requested change */
	47	requested_change = -1;
	48	spin_unlock_irqrestore(&pmu_blink_lock, flags);
	49	}
	50
	51	static void pmu_led_set(struct led_classdev *led_cdev,
	52	enum led_brightness brightness)
	53	{
	54	unsigned long flags;
	55
	56	spin_lock_irqsave(&pmu_blink_lock, flags);
	57	switch (brightness) {
	58	case LED_OFF:
	59	requested_change = 0;
	60	break;
	61	case LED_FULL:
	62	requested_change = 1;
	63	break;
	64	default:
65	goto out;
66	break;
67	}
68	/* if request isn't done, then don't do anything */
69	if (pmu_blink_req.complete && !sleeping)
70	pmu_request(&pmu_blink_req, NULL, 4, 0xee, 4, 0, requested_change);
71	out:
72	spin_unlock_irqrestore(&pmu_blink_lock, flags);
73	}
74
75	static struct led_classdev pmu_led = {
76	.name = "pmu-front-led",
77	#ifdef CONFIG_BLK_DEV_IDE_PMAC_BLINK
78	.default_trigger = "ide-disk",
79	#endif
80	.brightness_set = pmu_led_set,
81	};
82
83	#ifdef CONFIG_PM
84	static int pmu_led_sleep_call(struct pmu_sleep_notifier *self, int when)
85	{
86	unsigned long flags;
87
88	spin_lock_irqsave(&pmu_blink_lock, flags);
89
90	switch (when) {
91	case PBOOK_SLEEP_REQUEST:
92	sleeping = 1;
93	break;
94	case PBOOK_WAKE:
95	sleeping = 0;
96	break;
97	default:
98	/* do nothing */
99	break;
100	}
101	spin_unlock_irqrestore(&pmu_blink_lock, flags);
102
103	return PBOOK_SLEEP_OK;
104	}
105
106	static struct pmu_sleep_notifier via_pmu_led_sleep_notif = {
107	.notifier_call = pmu_led_sleep_call,
108	};
109	#endif
110
111	static int __init via_pmu_led_init(void)
112	{
113	struct device_node *dt;
114	const char *model;
115
116	/* only do this on keylargo based models */
117	if (pmu_get_model() != PMU_KEYLARGO_BASED)
118	return -ENODEV;
119
120	dt = of_find_node_by_path("/");
121	if (dt == NULL)
122	return -ENODEV;
123	model = (const char *)get_property(dt, "model", NULL);
124	if (model == NULL)
125	return -ENODEV;
126	if (strncmp(model, "PowerBook", strlen("PowerBook")) != 0 &&
127	strncmp(model, "iBook", strlen("iBook")) != 0) {
128	of_node_put(dt);
129	/* ignore */
130	return -ENODEV;
131	}
132	of_node_put(dt);
133
134	spin_lock_init(&pmu_blink_lock);
135	/* no outstanding req */
136	pmu_blink_req.complete = 1;
137	pmu_blink_req.done = pmu_req_done;
138	#ifdef CONFIG_PM
139	pmu_register_sleep_notifier(&via_pmu_led_sleep_notif);
140	#endif
141	return led_classdev_register(NULL, &pmu_led);
142	}
143
144	late_initcall(via_pmu_led_init);