1 /*
2  * arch/arm/mach-orion5x/board-d2net.c
3  *
4  * LaCie d2Network and Big Disk Network NAS setup
5  *
6  * Copyright (C) 2009 Simon Guinot <sguinot@lacie.com>
7  *
8  * This file is licensed under the terms of the GNU General Public
9  * License version 2. This program is licensed "as is" without any
10  * warranty of any kind, whether express or implied.
11  */
12 
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/platform_device.h>
16 #include <linux/pci.h>
17 #include <linux/irq.h>
18 #include <linux/leds.h>
19 #include <linux/gpio.h>
20 #include <asm/mach-types.h>
21 #include <asm/mach/arch.h>
22 #include <asm/mach/pci.h>
23 #include <plat/orion-gpio.h>
24 #include "common.h"
25 #include "orion5x.h"
26 
27 /*****************************************************************************
28  * LaCie d2 Network Info
29  ****************************************************************************/
30 
31 /*****************************************************************************
32  * GPIO LED's
33  ****************************************************************************/
34 
35 /*
36  * The blue front LED is wired to the CPLD and can blink in relation with the
37  * SATA activity.
38  *
39  * The following array detail the different LED registers and the combination
40  * of their possible values:
41  *
42  * led_off   | blink_ctrl | SATA active | LED state
43  *           |            |             |
44  *    1      |     x      |      x      |  off
45  *    0      |     0      |      0      |  off
46  *    0      |     1      |      0      |  blink (rate 300ms)
47  *    0      |     x      |      1      |  on
48  *
49  * Notes: The blue and the red front LED's can't be on at the same time.
50  *        Red LED have priority.
51  */
52 
53 #define D2NET_GPIO_RED_LED		6
54 #define D2NET_GPIO_BLUE_LED_BLINK_CTRL	16
55 #define D2NET_GPIO_BLUE_LED_OFF		23
56 
57 static struct gpio_led d2net_leds[] = {
58 	{
59 		.name = "d2net:blue:sata",
60 		.default_trigger = "default-on",
61 		.gpio = D2NET_GPIO_BLUE_LED_OFF,
62 		.active_low = 1,
63 	},
64 	{
65 		.name = "d2net:red:fail",
66 		.gpio = D2NET_GPIO_RED_LED,
67 	},
68 };
69 
70 static struct gpio_led_platform_data d2net_led_data = {
71 	.num_leds = ARRAY_SIZE(d2net_leds),
72 	.leds = d2net_leds,
73 };
74 
75 static struct platform_device d2net_gpio_leds = {
76 	.name           = "leds-gpio",
77 	.id             = -1,
78 	.dev            = {
79 		.platform_data  = &d2net_led_data,
80 	},
81 };
82 
83 static void __init d2net_gpio_leds_init(void)
84 {
85 	int err;
86 
87 	/* Configure register blink_ctrl to allow SATA activity LED blinking. */
88 	err = gpio_request(D2NET_GPIO_BLUE_LED_BLINK_CTRL, "blue LED blink");
89 	if (err == 0) {
90 		err = gpio_direction_output(D2NET_GPIO_BLUE_LED_BLINK_CTRL, 1);
91 		if (err)
92 			gpio_free(D2NET_GPIO_BLUE_LED_BLINK_CTRL);
93 	}
94 	if (err)
95 		pr_err("d2net: failed to configure blue LED blink GPIO\n");
96 
97 	platform_device_register(&d2net_gpio_leds);
98 }
99 
100 /*****************************************************************************
101  * General Setup
102  ****************************************************************************/
103 
104 void __init d2net_init(void)
105 {
106 	d2net_gpio_leds_init();
107 
108 	pr_notice("d2net: Flash write are not yet supported.\n");
109 }
110