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 <linux/gpio/machine.h>
18 #include <asm/mach-types.h>
19 #include <asm/mach/arch.h>
20 #include <asm/mach/pci.h>
21 #include <plat/orion-gpio.h>
22 #include "common.h"
23 #include "orion5x.h"
24
25 /*****************************************************************************
26 * LaCie d2 Network Info
27 ****************************************************************************/
28
29 /*****************************************************************************
30 * GPIO LED's
31 ****************************************************************************/
32
33 /*
34 * The blue front LED is wired to the CPLD and can blink in relation with the
35 * SATA activity.
36 *
37 * The following array detail the different LED registers and the combination
38 * of their possible values:
39 *
40 * led_off | blink_ctrl | SATA active | LED state
41 * | | |
42 * 1 | x | x | off
43 * 0 | 0 | 0 | off
44 * 0 | 1 | 0 | blink (rate 300ms)
45 * 0 | x | 1 | on
46 *
47 * Notes: The blue and the red front LED's can't be on at the same time.
48 * Red LED have priority.
49 */
50
51 #define D2NET_GPIO_RED_LED 6
52 #define D2NET_GPIO_BLUE_LED_BLINK_CTRL 16
53 #define D2NET_GPIO_BLUE_LED_OFF 23
54
55 static struct gpio_led d2net_leds[] = {
56 {
57 .name = "d2net:blue:sata",
58 .default_trigger = "default-on",
59 },
60 {
61 .name = "d2net:red:fail",
62 },
63 };
64
65 static struct gpio_led_platform_data d2net_led_data = {
66 .num_leds = ARRAY_SIZE(d2net_leds),
67 .leds = d2net_leds,
68 };
69
70 static struct platform_device d2net_gpio_leds = {
71 .name = "leds-gpio",
72 .id = -1,
73 .dev = {
74 .platform_data = &d2net_led_data,
75 },
76 };
77
78 static struct gpiod_lookup_table d2net_leds_gpio_table = {
79 .dev_id = "leds-gpio",
80 .table = {
81 GPIO_LOOKUP_IDX("orion_gpio0", D2NET_GPIO_BLUE_LED_OFF, NULL,
82 0, GPIO_ACTIVE_LOW),
83 GPIO_LOOKUP_IDX("orion_gpio0", D2NET_GPIO_RED_LED, NULL,
84 1, GPIO_ACTIVE_HIGH),
85 { },
86 },
87 };
88
d2net_gpio_leds_init(void)89 static void __init d2net_gpio_leds_init(void)
90 {
91 int err;
92
93 /* Configure register blink_ctrl to allow SATA activity LED blinking. */
94 err = gpio_request(D2NET_GPIO_BLUE_LED_BLINK_CTRL, "blue LED blink");
95 if (err == 0) {
96 err = gpio_direction_output(D2NET_GPIO_BLUE_LED_BLINK_CTRL, 1);
97 if (err)
98 gpio_free(D2NET_GPIO_BLUE_LED_BLINK_CTRL);
99 }
100 if (err)
101 pr_err("d2net: failed to configure blue LED blink GPIO\n");
102
103 gpiod_add_lookup_table(&d2net_leds_gpio_table);
104 platform_device_register(&d2net_gpio_leds);
105 }
106
107 /*****************************************************************************
108 * General Setup
109 ****************************************************************************/
110
d2net_init(void)111 void __init d2net_init(void)
112 {
113 d2net_gpio_leds_init();
114
115 pr_notice("d2net: Flash write are not yet supported.\n");
116 }
117