1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * arch/arm/mach-orion5x/board-d2net.c
4  *
5  * LaCie d2Network and Big Disk Network NAS setup
6  *
7  * Copyright (C) 2009 Simon Guinot <sguinot@lacie.com>
8  */
9 
10 #include <linux/kernel.h>
11 #include <linux/init.h>
12 #include <linux/platform_device.h>
13 #include <linux/pci.h>
14 #include <linux/irq.h>
15 #include <linux/leds.h>
16 #include <linux/gpio.h>
17 #include <asm/mach-types.h>
18 #include <asm/mach/arch.h>
19 #include <asm/mach/pci.h>
20 #include <plat/orion-gpio.h>
21 #include "common.h"
22 #include "orion5x.h"
23 
24 /*****************************************************************************
25  * LaCie d2 Network Info
26  ****************************************************************************/
27 
28 /*****************************************************************************
29  * GPIO LED's
30  ****************************************************************************/
31 
32 /*
33  * The blue front LED is wired to the CPLD and can blink in relation with the
34  * SATA activity.
35  *
36  * The following array detail the different LED registers and the combination
37  * of their possible values:
38  *
39  * led_off   | blink_ctrl | SATA active | LED state
40  *           |            |             |
41  *    1      |     x      |      x      |  off
42  *    0      |     0      |      0      |  off
43  *    0      |     1      |      0      |  blink (rate 300ms)
44  *    0      |     x      |      1      |  on
45  *
46  * Notes: The blue and the red front LED's can't be on at the same time.
47  *        Red LED have priority.
48  */
49 
50 #define D2NET_GPIO_RED_LED		6
51 #define D2NET_GPIO_BLUE_LED_BLINK_CTRL	16
52 #define D2NET_GPIO_BLUE_LED_OFF		23
53 
54 static struct gpio_led d2net_leds[] = {
55 	{
56 		.name = "d2net:blue:sata",
57 		.default_trigger = "default-on",
58 		.gpio = D2NET_GPIO_BLUE_LED_OFF,
59 		.active_low = 1,
60 	},
61 	{
62 		.name = "d2net:red:fail",
63 		.gpio = D2NET_GPIO_RED_LED,
64 	},
65 };
66 
67 static struct gpio_led_platform_data d2net_led_data = {
68 	.num_leds = ARRAY_SIZE(d2net_leds),
69 	.leds = d2net_leds,
70 };
71 
72 static struct platform_device d2net_gpio_leds = {
73 	.name           = "leds-gpio",
74 	.id             = -1,
75 	.dev            = {
76 		.platform_data  = &d2net_led_data,
77 	},
78 };
79 
80 static void __init d2net_gpio_leds_init(void)
81 {
82 	int err;
83 
84 	/* Configure register blink_ctrl to allow SATA activity LED blinking. */
85 	err = gpio_request(D2NET_GPIO_BLUE_LED_BLINK_CTRL, "blue LED blink");
86 	if (err == 0) {
87 		err = gpio_direction_output(D2NET_GPIO_BLUE_LED_BLINK_CTRL, 1);
88 		if (err)
89 			gpio_free(D2NET_GPIO_BLUE_LED_BLINK_CTRL);
90 	}
91 	if (err)
92 		pr_err("d2net: failed to configure blue LED blink GPIO\n");
93 
94 	platform_device_register(&d2net_gpio_leds);
95 }
96 
97 /*****************************************************************************
98  * General Setup
99  ****************************************************************************/
100 
101 void __init d2net_init(void)
102 {
103 	d2net_gpio_leds_init();
104 
105 	pr_notice("d2net: Flash write are not yet supported.\n");
106 }
107