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152 lines
3.3 KiB
152 lines
3.3 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* System Specific setup for Soekris net5501 |
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* At the moment this means setup of GPIO control of LEDs and buttons |
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* on net5501 boards. |
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* |
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* Copyright (C) 2008-2009 Tower Technologies |
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* Written by Alessandro Zummo <[email protected]> |
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* |
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* Copyright (C) 2008 Constantin Baranov <[email protected]> |
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* Copyright (C) 2011 Ed Wildgoose <[email protected]> |
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* and Philip Prindeville <[email protected]> |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/io.h> |
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#include <linux/string.h> |
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#include <linux/leds.h> |
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#include <linux/platform_device.h> |
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#include <linux/input.h> |
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#include <linux/gpio_keys.h> |
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#include <linux/gpio/machine.h> |
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#include <asm/geode.h> |
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#define BIOS_REGION_BASE 0xffff0000 |
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#define BIOS_REGION_SIZE 0x00010000 |
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static struct gpio_keys_button net5501_gpio_buttons[] = { |
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{ |
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.code = KEY_RESTART, |
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.gpio = 24, |
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.active_low = 1, |
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.desc = "Reset button", |
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.type = EV_KEY, |
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.wakeup = 0, |
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.debounce_interval = 100, |
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.can_disable = 0, |
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} |
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}; |
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static struct gpio_keys_platform_data net5501_buttons_data = { |
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.buttons = net5501_gpio_buttons, |
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.nbuttons = ARRAY_SIZE(net5501_gpio_buttons), |
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.poll_interval = 20, |
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}; |
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static struct platform_device net5501_buttons_dev = { |
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.name = "gpio-keys-polled", |
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.id = 1, |
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.dev = { |
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.platform_data = &net5501_buttons_data, |
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} |
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}; |
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static struct gpio_led net5501_leds[] = { |
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{ |
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.name = "net5501:1", |
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.default_trigger = "default-on", |
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}, |
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}; |
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static struct gpio_led_platform_data net5501_leds_data = { |
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.num_leds = ARRAY_SIZE(net5501_leds), |
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.leds = net5501_leds, |
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}; |
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static struct gpiod_lookup_table net5501_leds_gpio_table = { |
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.dev_id = "leds-gpio", |
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.table = { |
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/* The Geode GPIOs should be on the CS5535 companion chip */ |
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GPIO_LOOKUP_IDX("cs5535-gpio", 6, NULL, 0, GPIO_ACTIVE_HIGH), |
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{ } |
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}, |
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}; |
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static struct platform_device net5501_leds_dev = { |
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.name = "leds-gpio", |
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.id = -1, |
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.dev.platform_data = &net5501_leds_data, |
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}; |
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static struct platform_device *net5501_devs[] __initdata = { |
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&net5501_buttons_dev, |
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&net5501_leds_dev, |
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}; |
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static void __init register_net5501(void) |
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{ |
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/* Setup LED control through leds-gpio driver */ |
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gpiod_add_lookup_table(&net5501_leds_gpio_table); |
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platform_add_devices(net5501_devs, ARRAY_SIZE(net5501_devs)); |
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} |
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struct net5501_board { |
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u16 offset; |
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u16 len; |
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char *sig; |
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}; |
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static struct net5501_board __initdata boards[] = { |
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{ 0xb7b, 7, "net5501" }, /* net5501 v1.33/1.33c */ |
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{ 0xb1f, 7, "net5501" }, /* net5501 v1.32i */ |
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}; |
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static bool __init net5501_present(void) |
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{ |
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int i; |
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unsigned char *rombase, *bios; |
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bool found = false; |
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rombase = ioremap(BIOS_REGION_BASE, BIOS_REGION_SIZE - 1); |
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if (!rombase) { |
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printk(KERN_ERR "%s: failed to get rombase\n", KBUILD_MODNAME); |
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return found; |
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} |
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bios = rombase + 0x20; /* null terminated */ |
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if (memcmp(bios, "comBIOS", 7)) |
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goto unmap; |
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for (i = 0; i < ARRAY_SIZE(boards); i++) { |
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unsigned char *model = rombase + boards[i].offset; |
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if (!memcmp(model, boards[i].sig, boards[i].len)) { |
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printk(KERN_INFO "%s: system is recognized as \"%s\"\n", |
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KBUILD_MODNAME, model); |
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found = true; |
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break; |
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} |
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} |
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unmap: |
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iounmap(rombase); |
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return found; |
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} |
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static int __init net5501_init(void) |
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{ |
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if (!is_geode()) |
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return 0; |
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if (!net5501_present()) |
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return 0; |
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register_net5501(); |
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return 0; |
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} |
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device_initcall(net5501_init);
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