1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * System Specific setup for Soekris net5501
4*4882a593Smuzhiyun * At the moment this means setup of GPIO control of LEDs and buttons
5*4882a593Smuzhiyun * on net5501 boards.
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Copyright (C) 2008-2009 Tower Technologies
8*4882a593Smuzhiyun * Written by Alessandro Zummo <a.zummo@towertech.it>
9*4882a593Smuzhiyun *
10*4882a593Smuzhiyun * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
11*4882a593Smuzhiyun * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
12*4882a593Smuzhiyun * and Philip Prindeville <philipp@redfish-solutions.com>
13*4882a593Smuzhiyun */
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include <linux/kernel.h>
16*4882a593Smuzhiyun #include <linux/init.h>
17*4882a593Smuzhiyun #include <linux/io.h>
18*4882a593Smuzhiyun #include <linux/string.h>
19*4882a593Smuzhiyun #include <linux/leds.h>
20*4882a593Smuzhiyun #include <linux/platform_device.h>
21*4882a593Smuzhiyun #include <linux/input.h>
22*4882a593Smuzhiyun #include <linux/gpio_keys.h>
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun #include <asm/geode.h>
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun #define BIOS_REGION_BASE 0xffff0000
27*4882a593Smuzhiyun #define BIOS_REGION_SIZE 0x00010000
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun static struct gpio_keys_button net5501_gpio_buttons[] = {
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun .code = KEY_RESTART,
32*4882a593Smuzhiyun .gpio = 24,
33*4882a593Smuzhiyun .active_low = 1,
34*4882a593Smuzhiyun .desc = "Reset button",
35*4882a593Smuzhiyun .type = EV_KEY,
36*4882a593Smuzhiyun .wakeup = 0,
37*4882a593Smuzhiyun .debounce_interval = 100,
38*4882a593Smuzhiyun .can_disable = 0,
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun };
41*4882a593Smuzhiyun static struct gpio_keys_platform_data net5501_buttons_data = {
42*4882a593Smuzhiyun .buttons = net5501_gpio_buttons,
43*4882a593Smuzhiyun .nbuttons = ARRAY_SIZE(net5501_gpio_buttons),
44*4882a593Smuzhiyun .poll_interval = 20,
45*4882a593Smuzhiyun };
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun static struct platform_device net5501_buttons_dev = {
48*4882a593Smuzhiyun .name = "gpio-keys-polled",
49*4882a593Smuzhiyun .id = 1,
50*4882a593Smuzhiyun .dev = {
51*4882a593Smuzhiyun .platform_data = &net5501_buttons_data,
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun };
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun static struct gpio_led net5501_leds[] = {
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun .name = "net5501:1",
58*4882a593Smuzhiyun .gpio = 6,
59*4882a593Smuzhiyun .default_trigger = "default-on",
60*4882a593Smuzhiyun .active_low = 0,
61*4882a593Smuzhiyun },
62*4882a593Smuzhiyun };
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun static struct gpio_led_platform_data net5501_leds_data = {
65*4882a593Smuzhiyun .num_leds = ARRAY_SIZE(net5501_leds),
66*4882a593Smuzhiyun .leds = net5501_leds,
67*4882a593Smuzhiyun };
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun static struct platform_device net5501_leds_dev = {
70*4882a593Smuzhiyun .name = "leds-gpio",
71*4882a593Smuzhiyun .id = -1,
72*4882a593Smuzhiyun .dev.platform_data = &net5501_leds_data,
73*4882a593Smuzhiyun };
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun static struct platform_device *net5501_devs[] __initdata = {
76*4882a593Smuzhiyun &net5501_buttons_dev,
77*4882a593Smuzhiyun &net5501_leds_dev,
78*4882a593Smuzhiyun };
79*4882a593Smuzhiyun
register_net5501(void)80*4882a593Smuzhiyun static void __init register_net5501(void)
81*4882a593Smuzhiyun {
82*4882a593Smuzhiyun /* Setup LED control through leds-gpio driver */
83*4882a593Smuzhiyun platform_add_devices(net5501_devs, ARRAY_SIZE(net5501_devs));
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun struct net5501_board {
87*4882a593Smuzhiyun u16 offset;
88*4882a593Smuzhiyun u16 len;
89*4882a593Smuzhiyun char *sig;
90*4882a593Smuzhiyun };
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun static struct net5501_board __initdata boards[] = {
93*4882a593Smuzhiyun { 0xb7b, 7, "net5501" }, /* net5501 v1.33/1.33c */
94*4882a593Smuzhiyun { 0xb1f, 7, "net5501" }, /* net5501 v1.32i */
95*4882a593Smuzhiyun };
96*4882a593Smuzhiyun
net5501_present(void)97*4882a593Smuzhiyun static bool __init net5501_present(void)
98*4882a593Smuzhiyun {
99*4882a593Smuzhiyun int i;
100*4882a593Smuzhiyun unsigned char *rombase, *bios;
101*4882a593Smuzhiyun bool found = false;
102*4882a593Smuzhiyun
103*4882a593Smuzhiyun rombase = ioremap(BIOS_REGION_BASE, BIOS_REGION_SIZE - 1);
104*4882a593Smuzhiyun if (!rombase) {
105*4882a593Smuzhiyun printk(KERN_ERR "%s: failed to get rombase\n", KBUILD_MODNAME);
106*4882a593Smuzhiyun return found;
107*4882a593Smuzhiyun }
108*4882a593Smuzhiyun
109*4882a593Smuzhiyun bios = rombase + 0x20; /* null terminated */
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun if (memcmp(bios, "comBIOS", 7))
112*4882a593Smuzhiyun goto unmap;
113*4882a593Smuzhiyun
114*4882a593Smuzhiyun for (i = 0; i < ARRAY_SIZE(boards); i++) {
115*4882a593Smuzhiyun unsigned char *model = rombase + boards[i].offset;
116*4882a593Smuzhiyun
117*4882a593Smuzhiyun if (!memcmp(model, boards[i].sig, boards[i].len)) {
118*4882a593Smuzhiyun printk(KERN_INFO "%s: system is recognized as \"%s\"\n",
119*4882a593Smuzhiyun KBUILD_MODNAME, model);
120*4882a593Smuzhiyun
121*4882a593Smuzhiyun found = true;
122*4882a593Smuzhiyun break;
123*4882a593Smuzhiyun }
124*4882a593Smuzhiyun }
125*4882a593Smuzhiyun
126*4882a593Smuzhiyun unmap:
127*4882a593Smuzhiyun iounmap(rombase);
128*4882a593Smuzhiyun return found;
129*4882a593Smuzhiyun }
130*4882a593Smuzhiyun
net5501_init(void)131*4882a593Smuzhiyun static int __init net5501_init(void)
132*4882a593Smuzhiyun {
133*4882a593Smuzhiyun if (!is_geode())
134*4882a593Smuzhiyun return 0;
135*4882a593Smuzhiyun
136*4882a593Smuzhiyun if (!net5501_present())
137*4882a593Smuzhiyun return 0;
138*4882a593Smuzhiyun
139*4882a593Smuzhiyun register_net5501();
140*4882a593Smuzhiyun
141*4882a593Smuzhiyun return 0;
142*4882a593Smuzhiyun }
143*4882a593Smuzhiyun device_initcall(net5501_init);
144