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Date: Fri, 26 Dec 2008 02:26:02 +0100
From: Alessandro Zummo <alessandro.zummo@...ertech.it>
To: lkml <linux-kernel@...r.kernel.org>
Cc: rpurdie@...ys.net
Subject: [PATCH] Soekris net5501 board support code
This patch detects the net5501 board and instantiates the
correct platform devices (GPIO and leds).
Signed-off-by: Alessandro Zummo <a.zummo@...ertech.it>
---
arch/x86/Kconfig | 9 +++
arch/x86/kernel/Makefile | 1
arch/x86/kernel/soekris.c | 128 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 138 insertions(+)
--- linux-tuxrouter-2.6.28-isdn.orig/arch/x86/Kconfig 2008-12-25 16:55:23.000000000 +0100
+++ linux-tuxrouter-2.6.28-isdn/arch/x86/Kconfig 2008-12-25 16:55:24.000000000 +0100
@@ -1850,6 +1850,15 @@ config OLPC
Add support for detecting the unique features of the OLPC
XO hardware.
+config SOEKRIS
+ bool "Soekris net5501 support"
+ depends on MGEODE_LX
+ default n
+ help
+ Add support for the Soekris net5501 board. You might also want
+ to enable support for the AMD CS553X GPIOs (CONFIG_GPIO_CS553X)
+ and leds.
+
endif # X86_32
config K8_NB
--- linux-tuxrouter-2.6.28-isdn.orig/arch/x86/kernel/Makefile 2008-12-25 16:55:23.000000000 +0100
+++ linux-tuxrouter-2.6.28-isdn/arch/x86/kernel/Makefile 2008-12-25 16:55:24.000000000 +0100
@@ -99,6 +99,7 @@ obj-$(CONFIG_SCx200) += scx200.o
scx200-y += scx200_32.o
obj-$(CONFIG_OLPC) += olpc.o
+obj-$(CONFIG_SOEKRIS) += soekris.o
microcode-y := microcode_core.o
microcode-$(CONFIG_MICROCODE_INTEL) += microcode_intel.o
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-tuxrouter-2.6.28-isdn/arch/x86/kernel/soekris.c 2008-12-25 16:55:45.000000000 +0100
@@ -0,0 +1,128 @@
+/*
+ * Soekris board support code
+ *
+ * Copyright (c) 2008 Tower Technologies
+ * Written by Alessandro Zummo <a.zummo@...ertech.it>
+ *
+ * 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 <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/string.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+
+#include <asm/geode.h>
+
+#if defined(CONFIG_GPIO_CS553X) || defined(CONFIG_GPIO_CS553X_MODULE)
+#ifdef CONFIG_LEDS_CLASS
+static struct gpio_led net5501_leds[] = {
+ { .name = "error", .gpio = -1 }, /* filled later */
+};
+
+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,
+};
+#endif /* CONFIG_LEDS_CLASS */
+
+static int cs553x_gpio_setup(struct platform_device *pdev, unsigned base,
+ unsigned ngpio, void *context)
+{
+#ifdef CONFIG_LEDS_CLASS
+ net5501_leds[0].gpio = base + 6; /* "error" led */
+ return platform_device_register(&net5501_leds_dev);
+#else
+ return 0;
+#endif
+}
+
+static int cs553x_gpio_teardown(struct platform_device *pdev, unsigned base,
+ unsigned ngpio, void *context)
+{
+#ifdef CONFIG_LEDS_CLASS
+ platform_device_unregister(&net5501_leds_dev);
+#endif
+ return 0;
+}
+
+struct cs553x_gpio_platform_data net5501_gpio_data = {
+ .gpio_base = -1,
+ .io_base = 0, /* filled later */
+ .setup = cs553x_gpio_setup,
+ .teardown = cs553x_gpio_teardown,
+};
+
+static struct platform_device net5501_gpio = {
+ .name = "cs553x-gpio",
+ .id = -1,
+ .dev.platform_data = &net5501_gpio_data,
+};
+#endif /* CONFIG_GPIO_CS553X */
+
+static void __init init_net5501(void)
+{
+#if defined(CONFIG_GPIO_CS553X) || defined(CONFIG_GPIO_CS553X_MODULE)
+ net5501_gpio_data.io_base = geode_gpio_base();
+ platform_device_register(&net5501_gpio);
+#endif
+}
+
+struct soekris_board {
+ u16 offset;
+ 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 int __init soekris_init(void)
+{
+ int i;
+ unsigned char *rombase, *bios;
+
+ if (!is_geode() || geode_has_vsa2())
+ return 0;
+
+ rombase = ioremap(0xffff0000, 0xffff);
+ if (!rombase)
+ return 0;
+
+ bios = rombase + 0x20; /* null terminated */
+
+ if (strncmp(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 (boards[i].init)
+ boards[i].init();
+ break;
+ }
+ }
+
+unmap:
+ iounmap(rombase);
+ return 0;
+}
+
+arch_initcall(soekris_init);
--
Best regards,
Alessandro Zummo,
Tower Technologies - Torino, Italy
http://www.towertech.it
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