Commit da4e3302 authored by Philip Prindeville's avatar Philip Prindeville Committed by Ingo Molnar

x86/geode/net5501: Add platform driver for Soekris Engineering net5501

Add platform driver for the Soekris Engineering net5501 single-board
computer.  Probes well-known locations in ROM for BIOS signature
to confirm correct platform.  Registers 1 LED and 1 GPIO-based
button (typically used for soft reset).
Signed-off-by: default avatarPhilip Prindeville <philipp@redfish-solutions.com>
Acked-by: default avatarAlessandro Zummo <a.zummo@towertech.it>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Andres Salomon <dilinger@queued.net>
Cc: Matthew Garrett <mjg@redhat.com>
[ Removed Kconfig and Makefile detritus from drivers/leds/]
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/n/tip-jv5uf34996juqh5syes8mn4h@git.kernel.orgSigned-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 373913b5
......@@ -2114,6 +2114,12 @@ config ALIX
Note: You have to set alix.force=1 for boards with Award BIOS.
config NET5501
bool "Soekris Engineering net5501 System Support (LEDS, GPIO, etc)"
select GPIOLIB
---help---
This option enables system support for the Soekris Engineering net5501.
endif # X86_32
config AMD_NB
......
obj-$(CONFIG_ALIX) += alix.o
obj-$(CONFIG_NET5501) += net5501.o
/*
* Soekris board support code
* System Specific setup for Soekris net5501
* At the moment this means setup of GPIO control of LEDs and buttons
* on net5501 boards.
*
*
* Copyright (C) 2008-2009 Tower Technologies
* Written by Alessandro Zummo <a.zummo@towertech.it>
*
* Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
* Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
* and Philip Prindeville <philipp@redfish-solutions.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
......@@ -13,18 +20,50 @@
#include <linux/init.h>
#include <linux/io.h>
#include <linux/string.h>
#include <linux/module.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/gpio_keys.h>
#include <asm/geode.h>
static const struct gpio_led net5501_leds[] = {
#define BIOS_REGION_BASE 0xffff0000
#define BIOS_REGION_SIZE 0x00010000
static struct gpio_keys_button net5501_gpio_buttons[] = {
{
.code = KEY_RESTART,
.gpio = 24,
.active_low = 1,
.desc = "Reset button",
.type = EV_KEY,
.wakeup = 0,
.debounce_interval = 100,
.can_disable = 0,
}
};
static struct gpio_keys_platform_data net5501_buttons_data = {
.buttons = net5501_gpio_buttons,
.nbuttons = ARRAY_SIZE(net5501_gpio_buttons),
.poll_interval = 20,
};
static struct platform_device net5501_buttons_dev = {
.name = "gpio-keys-polled",
.id = 1,
.dev = {
.platform_data = &net5501_buttons_data,
}
};
static struct gpio_led net5501_leds[] = {
{
.name = "error",
.name = "net5501:1",
.gpio = 6,
.default_trigger = "default-on",
.active_low = 1,
},
};
......@@ -39,59 +78,77 @@ static struct platform_device net5501_leds_dev = {
.dev.platform_data = &net5501_leds_data,
};
static void __init init_net5501(void)
static struct __initdata platform_device *net5501_devs[] = {
&net5501_buttons_dev,
&net5501_leds_dev,
};
static void __init register_net5501(void)
{
platform_device_register(&net5501_leds_dev);
/* Setup LED control through leds-gpio driver */
platform_add_devices(net5501_devs, ARRAY_SIZE(net5501_devs));
}
struct soekris_board {
struct net5501_board {
u16 offset;
u16 len;
char *sig;
u8 len;
void (*init)(void);
};
static struct soekris_board __initdata boards[] = {
{ 0xb7b, "net5501", 7, init_net5501 }, /* net5501 v1.33/1.33c */
{ 0xb1f, "net5501", 7, init_net5501 }, /* net5501 v1.32i */
static struct net5501_board __initdata boards[] = {
{ 0xb7b, 7, "net5501" }, /* net5501 v1.33/1.33c */
{ 0xb1f, 7, "net5501" }, /* net5501 v1.32i */
};
static int __init soekris_init(void)
static bool __init net5501_present(void)
{
int i;
unsigned char *rombase, *bios;
bool found = false;
if (!is_geode())
return 0;
rombase = ioremap(0xffff0000, 0xffff);
rombase = ioremap(BIOS_REGION_BASE, BIOS_REGION_SIZE - 1);
if (!rombase) {
printk(KERN_INFO "Soekris net5501 LED driver failed to get rombase");
return 0;
printk(KERN_ERR "%s: failed to get rombase\n", KBUILD_MODNAME);
return found;
}
bios = rombase + 0x20; /* null terminated */
if (strncmp(bios, "comBIOS", 7))
if (memcmp(bios, "comBIOS", 7))
goto unmap;
for (i = 0; i < ARRAY_SIZE(boards); i++) {
unsigned char *model = rombase + boards[i].offset;
if (strncmp(model, boards[i].sig, boards[i].len) == 0) {
printk(KERN_INFO "Soekris %s: %s\n", model, bios);
if (!memcmp(model, boards[i].sig, boards[i].len)) {
printk(KERN_INFO "%s: system is recognized as \"%s\"\n",
KBUILD_MODNAME, model);
if (boards[i].init)
boards[i].init();
found = true;
break;
}
}
unmap:
iounmap(rombase);
return found;
}
static int __init net5501_init(void)
{
if (!is_geode())
return 0;
if (!net5501_present())
return 0;
register_net5501();
return 0;
}
arch_initcall(soekris_init);
module_init(net5501_init);
MODULE_AUTHOR("Philip Prindeville <philipp@redfish-solutions.com>");
MODULE_DESCRIPTION("Soekris net5501 System Setup");
MODULE_LICENSE("GPL");
......@@ -89,16 +89,6 @@ config LEDS_NET48XX
This option enables support for the Soekris net4801 and net4826 error
LED.
config LEDS_NET5501
tristate "LED Support for Soekris net5501 series Error LED"
depends on LEDS_TRIGGERS
depends on X86 && GPIO_CS5535
select LEDS_TRIGGER_DEFAULT_ON
default n
help
Add support for the Soekris net5501 board (detection, error led
and GPIO).
config LEDS_FSG
tristate "LED Support for the Freecom FSG-3"
depends on LEDS_CLASS
......
......@@ -14,7 +14,6 @@ obj-$(CONFIG_LEDS_MIKROTIK_RB532) += leds-rb532.o
obj-$(CONFIG_LEDS_S3C24XX) += leds-s3c24xx.o
obj-$(CONFIG_LEDS_AMS_DELTA) += leds-ams-delta.o
obj-$(CONFIG_LEDS_NET48XX) += leds-net48xx.o
obj-$(CONFIG_LEDS_NET5501) += leds-net5501.o
obj-$(CONFIG_LEDS_WRAP) += leds-wrap.o
obj-$(CONFIG_LEDS_COBALT_QUBE) += leds-cobalt-qube.o
obj-$(CONFIG_LEDS_COBALT_RAQ) += leds-cobalt-raq.o
......
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