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
d2net_gpio_leds_init(void)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
d2net_init(void)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