From da4e3302949f4a702f1ddfefe067762232d363d5 Mon Sep 17 00:00:00 2001 From: Philip Prindeville Date: Mon, 5 Mar 2012 15:05:15 -0800 Subject: 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: Philip Prindeville Acked-by: Alessandro Zummo Cc: Richard Purdie Cc: Andres Salomon Cc: Matthew Garrett [ Removed Kconfig and Makefile detritus from drivers/leds/] Signed-off-by: Andrew Morton Link: http://lkml.kernel.org/n/tip-jv5uf34996juqh5syes8mn4h@git.kernel.org Signed-off-by: Ingo Molnar --- arch/x86/platform/geode/Makefile | 1 + arch/x86/platform/geode/net5501.c | 154 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 155 insertions(+) create mode 100644 arch/x86/platform/geode/net5501.c (limited to 'arch/x86/platform') diff --git a/arch/x86/platform/geode/Makefile b/arch/x86/platform/geode/Makefile index 07c9cd05021..246b788847f 100644 --- a/arch/x86/platform/geode/Makefile +++ b/arch/x86/platform/geode/Makefile @@ -1 +1,2 @@ obj-$(CONFIG_ALIX) += alix.o +obj-$(CONFIG_NET5501) += net5501.o diff --git a/arch/x86/platform/geode/net5501.c b/arch/x86/platform/geode/net5501.c new file mode 100644 index 00000000000..66d377e334f --- /dev/null +++ b/arch/x86/platform/geode/net5501.c @@ -0,0 +1,154 @@ +/* + * 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 + * + * Copyright (C) 2008 Constantin Baranov + * Copyright (C) 2011 Ed Wildgoose + * and Philip Prindeville + * + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#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 = "net5501:1", + .gpio = 6, + .default_trigger = "default-on", + .active_low = 1, + }, +}; + +static struct gpio_led_platform_data net5501_leds_data = { + .num_leds = ARRAY_SIZE(net5501_leds), + .leds = net5501_leds, +}; + +static struct platform_device net5501_leds_dev = { + .name = "leds-gpio", + .id = -1, + .dev.platform_data = &net5501_leds_data, +}; + +static struct __initdata platform_device *net5501_devs[] = { + &net5501_buttons_dev, + &net5501_leds_dev, +}; + +static void __init register_net5501(void) +{ + /* Setup LED control through leds-gpio driver */ + platform_add_devices(net5501_devs, ARRAY_SIZE(net5501_devs)); +} + +struct net5501_board { + u16 offset; + u16 len; + char *sig; +}; + +static struct net5501_board __initdata boards[] = { + { 0xb7b, 7, "net5501" }, /* net5501 v1.33/1.33c */ + { 0xb1f, 7, "net5501" }, /* net5501 v1.32i */ +}; + +static bool __init net5501_present(void) +{ + int i; + unsigned char *rombase, *bios; + bool found = false; + + rombase = ioremap(BIOS_REGION_BASE, BIOS_REGION_SIZE - 1); + if (!rombase) { + printk(KERN_ERR "%s: failed to get rombase\n", KBUILD_MODNAME); + return found; + } + + bios = rombase + 0x20; /* null terminated */ + + if (memcmp(bios, "comBIOS", 7)) + goto unmap; + + for (i = 0; i < ARRAY_SIZE(boards); i++) { + unsigned char *model = rombase + boards[i].offset; + + if (!memcmp(model, boards[i].sig, boards[i].len)) { + printk(KERN_INFO "%s: system is recognized as \"%s\"\n", + KBUILD_MODNAME, model); + + 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; +} + +module_init(net5501_init); + +MODULE_AUTHOR("Philip Prindeville "); +MODULE_DESCRIPTION("Soekris net5501 System Setup"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3