port new diag driver to kamikaze

SVN-Revision: 5426

2 files changed, 957 insertions, 0 deletions

diff --git a/package/broadcom-diag/src/Makefile b/package/broadcom-diag/src/Makefile
new file mode 100644
index 0000000000..a43f5f3043
--- /dev/null
+++ b/package/broadcom-diag/src/Makefile
@@ -0,0 +1,18 @@
+# $Id$
+#
+# Makefile for diag driver
+#
+# Copyright (C) 2005 Felix Fietkau <nbd@openwrt.org>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version
+# 2 of the License, or (at your option) any later version.
+#
+
+obj-m := diag.o
+
+ifeq ($(MAKING_MODULES),1)
+
+-include $(TOPDIR)/Rules.make
+endif
diff --git a/package/broadcom-diag/src/diag.c b/package/broadcom-diag/src/diag.c
new file mode 100644
index 0000000000..b7c67314f7
--- /dev/null
+++ b/package/broadcom-diag/src/diag.c
@@ -0,0 +1,939 @@
+/*
+ * diag.c - GPIO interface driver for Broadcom boards
+ *
+ * Copyright (C) 2006 Mike Baker <mbm@openwrt.org>,
+ *                    Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * $Id:$
+ */
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/kmod.h>
+#include <linux/proc_fs.h>
+#include <linux/timer.h>
+#include <linux/version.h>
+#include <asm/uaccess.h>
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+#include <linux/kobject.h>
+#include <linux/workqueue.h>
+#define hotplug_path uevent_helper
+#else
+#include <linux/tqueue.h>
+#define INIT_WORK INIT_TQUEUE
+#define schedule_work schedule_task
+#define work_struct tq_struct
+#define sbh bcm947xx_sbh
+#define sbh_lock bcm947xx_sbh_lock
+#endif
+
+#include <typedefs.h>
+#include <osl.h>
+#include <bcmdevs.h>
+#include <sbutils.h>
+#include <sbconfig.h>
+#include <sbchipc.h>
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+#include <sbmips.h>
+#else
+#include <hndcpu.h>
+#endif
+
+#define MODULE_NAME "diag"
+
+#define MAX_GPIO 8
+#define FLASH_TIME HZ/6
+
+#define EXTIF_ADDR 0x1f000000
+#define EXTIF_UART (EXTIF_ADDR + 0x00800000)
+
+/* For LEDs */
+#define GPIO_TYPE_NORMAL	(0x0 << 24)
+#define GPIO_TYPE_EXTIF 	(0x1 << 24)
+#define GPIO_TYPE_MASK  	(0xf << 24)
+
+static unsigned int gpiomask = 0;
+module_param(gpiomask, int, 0644);
+
+enum polarity_t {
+	REVERSE = 0,
+	NORMAL = 1,
+};
+
+enum {
+	PROC_BUTTON,
+	PROC_LED,
+	PROC_MODEL,
+	PROC_GPIOMASK
+};
+
+struct prochandler_t {
+	int type;
+	void *ptr;
+};
+
+struct button_t {
+	struct prochandler_t proc;
+	char *name;
+	u16 gpio;
+	u8 polarity;
+	u8 pressed;
+	unsigned long seen;
+};
+
+struct led_t {
+	struct prochandler_t proc;
+	char *name;
+	u32 gpio;
+	u8 polarity;
+	u8 flash;
+	u8 state;
+};
+
+struct platform_t {
+	char *name;
+	struct button_t buttons[MAX_GPIO];
+	struct led_t leds[MAX_GPIO];
+};
+
+enum {
+	/* Linksys */
+	WAP54GV1,
+	WAP54GV3,
+	WRT54GV1,
+	WRT54G,
+	WRTSL54GS,
+	WRT54G3G,
+	
+	/* ASUS */
+	WLHDD,
+	WL300G,
+	WL500G,
+	WL500GD,
+	WL500GP,
+	ASUS_4702,
+	
+	/* Buffalo */
+	WBR2_G54,
+	WHR_G54S,
+	WHR_HP_G54,
+	WHR2_A54G54,
+	WLA2_G54L,
+	BUFFALO_UNKNOWN,
+	BUFFALO_UNKNOWN_4710,
+
+	/* Siemens */
+	SE505V1,
+	SE505V2,
+	
+	/* US Robotics */
+	USR5461,
+
+	/* Dell */
+	TM2300,
+
+	/* Motorola */
+	WE800G,
+	WR850GV1,
+	WR850GV2,
+
+	/* Belkin */
+	BELKIN_UNKNOWN,
+};
+
+static struct platform_t platforms[] = {
+	/* Linksys */
+	[WAP54GV1] = {
+		.name		= "Linksys WAP54G V1",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 0 },
+		},
+		.leds		= { 
+			{ .name = "diag",	.gpio = 1 << 3 },
+			{ .name = "wlan",	.gpio = 1 << 4 },
+		},
+	},
+	[WAP54GV3] = {
+		.name		= "Linksys WAP54G V3",
+		.buttons	= {
+			/* FIXME: verify this */
+			{ .name = "reset",	.gpio = 1 << 7 },
+			{ .name = "ses",	.gpio = 1 << 0 },
+		},
+		.leds		= { 
+			/* FIXME: diag? */
+			{ .name = "ses",	.gpio = 1 << 1 },
+		},
+	},
+	[WRT54GV1] = {
+		.name		= "Linksys WRT54G V1.x",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 6 },
+		},
+		.leds		= { 
+			{ .name = "diag",	.gpio = 0x13 | GPIO_TYPE_EXTIF, .polarity = NORMAL },
+			{ .name = "dmz",	.gpio = 0x12 | GPIO_TYPE_EXTIF, .polarity = NORMAL },
+		},
+	},
+	[WRT54G] = {
+		.name		= "Linksys WRT54G*",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 6 },
+			{ .name = "ses",	.gpio = 1 << 4 },
+		},
+		.leds		= {
+			{ .name = "power",	.gpio = 1 << 1, .polarity = NORMAL },
+			{ .name = "dmz",	.gpio = 1 << 7, .polarity = REVERSE },
+			{ .name = "ses_white",	.gpio = 1 << 2, .polarity = REVERSE },
+			{ .name = "ses_orange",	.gpio = 1 << 3, .polarity = REVERSE },
+			{ .name = "wlan",	.gpio = 1 << 0, .polarity = REVERSE },
+		},
+	},
+	[WRTSL54GS] = {
+		.name		= "Linksys WRTSL54GS",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 6 },
+			{ .name = "ses",	.gpio = 1 << 4 },
+		},
+		.leds		= {
+			{ .name = "power",	.gpio = 1 << 1, .polarity = NORMAL },
+			{ .name = "dmz",	.gpio = 1 << 7, .polarity = REVERSE },
+			{ .name = "ses_white",	.gpio = 1 << 5, .polarity = REVERSE },
+			{ .name = "ses_orange",	.gpio = 1 << 7, .polarity = REVERSE },
+		},
+	},
+	[WRT54G3G] = {
+		.name		= "Linksys WRT54G3G",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 6 },
+			{ .name = "3g",		.gpio = 1 << 4 },
+		},
+		.leds		= {
+			{ .name = "power",	.gpio = 1 << 1, .polarity = NORMAL },
+			{ .name = "dmz",	.gpio = 1 << 7, .polarity = REVERSE },
+			{ .name = "3g_green",	.gpio = 1 << 2, .polarity = NORMAL },
+			{ .name = "3g_blue",	.gpio = 1 << 3, .polarity = NORMAL },
+			{ .name = "3g_blink",	.gpio = 1 << 5, .polarity = NORMAL },
+		},
+	},
+	/* Asus */
+	[WLHDD] = {
+		.name		= "ASUS WL-HDD",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 6 },
+		},
+		.leds		= {
+			{ .name = "power",	.gpio = 1 << 0, .polarity = REVERSE },
+		},
+	},
+	[WL300G] = {
+		.name		= "ASUS WL-500g",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 6 },
+		},
+		.leds		= {
+			{ .name = "power",	.gpio = 1 << 0, .polarity = REVERSE },
+		},
+	},
+	[WL500G] = {
+		.name		= "ASUS WL-500g",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 6 },
+		},
+		.leds		= {
+			{ .name = "power",	.gpio = 1 << 0, .polarity = REVERSE },
+		},
+	},
+	[WL500GD] = {
+		.name		= "ASUS WL-500g Deluxe",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 6 },
+		},
+		.leds		= {
+			{ .name = "power",	.gpio = 1 << 0, .polarity = REVERSE },
+		},
+	},
+	[WL500GP] = {
+		.name		= "ASUS WL-500g Premium",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 0 },
+			{ .name = "ses",	.gpio = 1 << 4 },
+		},
+		.leds		= {
+			{ .name = "power",	.gpio = 1 << 1, .polarity = REVERSE },
+		},
+	},
+	[ASUS_4702] = {
+		.name		= "ASUS (unknown, BCM4702)",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 6 },
+		},
+		.leds		= {
+			{ .name = "power",	.gpio = 1 << 0, .polarity = REVERSE },
+		},
+	},
+	/* Buffalo */
+	[WHR_G54S] = {
+		.name		= "Buffalo WHR-G54S",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 4 },
+			{ .name = "ses",	.gpio = 1 << 0 },
+		},
+		.leds		= {
+			{ .name = "diag",	.gpio = 1 << 1, .polarity = REVERSE },
+			{ .name = "internal",	.gpio = 1 << 3, .polarity = REVERSE },
+			{ .name = "ses",	.gpio = 1 << 6, .polarity = REVERSE },
+		},
+	},
+	[WBR2_G54] = {
+		.name		= "Buffalo WBR2-G54",
+		/* FIXME: verify */
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 7 },
+		},
+		.leds		= {
+			{ .name = "diag",	.gpio = 1 << 1, .polarity = REVERSE },
+		},
+	},
+	[WHR_HP_G54] = {
+		.name		= "Buffalo WHR-HP-G54",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 4 },
+			{ .name = "bridge",	.gpio = 1 << 5 },
+			{ .name = "ses",	.gpio = 1 << 0 },
+		},
+		.leds		= {
+			{ .name = "diag",	.gpio = 1 << 7, .polarity = REVERSE },
+			{ .name = "bridge",	.gpio = 1 << 1, .polarity = REVERSE },
+			{ .name = "ses",	.gpio = 1 << 6, .polarity = REVERSE },
+		},
+	},
+	[WHR2_A54G54] = {
+		.name		= "Buffalo WHR2-A54G54",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 4 },
+		},
+		.leds		= {
+			{ .name = "diag",	.gpio = 1 << 7, .polarity = REVERSE },
+		},
+	},
+	[WLA2_G54L] = {
+		.name		= "Buffalo WLA2-G54L",
+		/* FIXME: verify */
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 7 },
+		},
+		.leds		= {
+			{ .name = "diag",	.gpio = 1 << 1, .polarity = REVERSE },
+		},
+	},
+	[BUFFALO_UNKNOWN] = {
+		.name		= "Buffalo (unknown)",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 7 },
+		},
+		.leds		= {
+			{ .name = "diag",	.gpio = 1 << 1, .polarity = REVERSE },
+		},
+	},
+	[BUFFALO_UNKNOWN_4710] = {
+		.name		= "Buffalo (unknown, BCM4710)",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 4 },
+		},
+		.leds		= {
+			{ .name = "diag",	.gpio = 1 << 1, .polarity = REVERSE },
+		},
+	},
+	/* Siemens */
+	[SE505V1] = {
+		.name		= "Siemens SE505 V1",
+		.buttons	= {
+			/* No usable buttons */
+		},
+		.leds		= {
+			{ .name = "dmz",	.gpio = 1 << 4, .polarity = REVERSE },
+			{ .name = "wlan",	.gpio = 1 << 3, .polarity = REVERSE },
+		},
+	},
+	[SE505V2] = {
+		.name		= "Siemens SE505 V2",
+		.buttons	= {
+			/* No usable buttons */
+		},
+		.leds		= {
+			{ .name = "power",	.gpio = 1 << 5, .polarity = REVERSE },
+			{ .name = "dmz",	.gpio = 1 << 0, .polarity = REVERSE },
+			{ .name = "wlan",	.gpio = 1 << 3, .polarity = REVERSE },
+		},
+	},
+	/* US Robotics */
+	[USR5461] = {
+		.name		= "U.S. Robotics USR5461",
+		.buttons	= {
+			/* No usable buttons */
+		},
+		.leds		= {
+			{ .name = "wlan",	.gpio = 1 << 0, .polarity = REVERSE },
+			{ .name = "printer",	.gpio = 1 << 1, .polarity = REVERSE },
+		},
+	},
+	/* Dell */
+	[TM2300] = {
+		.name		= "Dell TrueMobile 2300",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 0 },
+		},
+		.leds		= {
+			{ .name = "diag",	.gpio = 1 << 7, .polarity = REVERSE },
+		},
+	},
+	/* Motorola */
+	[WE800G] = {
+		.name		= "Motorola WE800G",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 0 },
+		},
+		.leds		= {
+			{ .name = "power",	.gpio = 1 << 4, .polarity = NORMAL },
+			{ .name = "diag",	.gpio = 1 << 2, .polarity = REVERSE },
+			{ .name = "wlan_amber",	.gpio = 1 << 1, .polarity = NORMAL },
+		},
+	},
+	[WR850GV1] = {
+		.name		= "Motorola WR850G V1",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 0 },
+		},
+		.leds		= {
+			{ .name = "power",	.gpio = 1 << 4, .polarity = NORMAL },
+			{ .name = "diag",	.gpio = 1 << 3, .polarity = REVERSE },
+			{ .name = "modem",	.gpio = 1 << 6, .polarity = NORMAL },
+			{ .name = "wlan_red",	.gpio = 1 << 5, .polarity = REVERSE },
+			{ .name = "wlan_green",	.gpio = 1 << 7, .polarity = REVERSE },
+		},
+	},
+	[WR850GV2] = {
+		.name		= "Motorola WR850G V2",
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 5 },
+		},
+		.leds		= {
+			{ .name = "diag",	.gpio = 1 << 1, .polarity = REVERSE },
+			{ .name = "wlan",	.gpio = 1 << 0, .polarity = NORMAL },
+			{ .name = "modem_green",.gpio = 1 << 6, .polarity = REVERSE },
+			{ .name = "modem_red",	.gpio = 1 << 7, .polarity = REVERSE },
+		},
+	},
+	/* Belkin */
+	[BELKIN_UNKNOWN] = {
+		.name		= "Belkin (unknown)",
+		/* FIXME: verify & add detection */
+		.buttons	= {
+			{ .name = "reset",	.gpio = 1 << 7 },
+		},
+		.leds		= {
+			{ .name = "power",	.gpio = 1 << 5, .polarity = NORMAL },
+			{ .name = "wlan",	.gpio = 1 << 3, .polarity = NORMAL },
+			{ .name = "connected",	.gpio = 1 << 0, .polarity = NORMAL },
+		},
+	},
+};
+
+extern void *sbh;
+extern spinlock_t sbh_lock;
+extern char *nvram_get(char *str);
+
+static struct proc_dir_entry *diag, *leds;
+static struct platform_t platform;
+static void led_flash(unsigned long dummy);
+
+#define getvar(str) (nvram_get(str)?:"")
+
+static void set_led_extif(struct led_t *led)
+{
+	volatile u8 *addr = (volatile u8 *) KSEG1ADDR(EXTIF_UART) + (led->gpio & ~GPIO_TYPE_MASK);
+	if (led->state)
+		*addr = 0xFF;
+	else
+		*addr;
+}
+
+static struct platform_t __init *platform_detect(void)
+{
+	char *boardnum, *boardtype, *buf;
+
+	boardnum = getvar("boardnum");
+	boardtype = getvar("boardtype");
+	if (strncmp(getvar("pmon_ver"), "CFE", 3) == 0) {
+		/* CFE based - newer hardware */
+		if (!strcmp(boardnum, "42")) { /* Linksys */
+			if (!strcmp(boardtype, "0x0101"))
+				return &platforms[WRT54G3G];
+
+			if (!strcmp(getvar("et1phyaddr"),"5") && !strcmp(getvar("et1mdcport"), "1"))
+				return &platforms[WRTSL54GS];
+			
+			/* default to WRT54G */
+			return &platforms[WRT54G];
+		}
+		
+		if (!strcmp(boardnum, "45")) { /* ASUS */
+			if (!strcmp(boardtype,"0x042f"))
+				return &platforms[WL500GP];
+			else
+				return &platforms[WL500GD];
+		}
+		
+		if (!strcmp(boardnum, "10496"))
+			return &platforms[USR5461];
+	} else { /* PMON based - old stuff */
+		if (!strncmp(boardtype, "bcm94710dev", 11)) {
+			if (!strcmp(boardnum, "42"))
+				return &platforms[WRT54GV1];
+			if (simple_strtoul(boardnum, NULL, 9) == 2)
+				return &platforms[WAP54GV1];
+		}
+		if (!strncmp(getvar("hardware_version"), "WL500-", 6))
+			return &platforms[WL500G];
+		if (!strncmp(getvar("hardware_version"), "WL300-", 6)) {
+			/* Either WL-300g or WL-HDD, do more extensive checks */
+			if ((simple_strtoul(getvar("et0phyaddr"), NULL, 0) == 0) &&
+				(simple_strtoul(getvar("et1phyaddr"), NULL, 9) == 1))
+				return &platforms[WLHDD];
+			if ((simple_strtoul(getvar("et0phyaddr"), NULL, 0) == 0) &&
+				(simple_strtoul(getvar("et1phyaddr"), NULL, 9) == 10))
+				return &platforms[WL300G];
+		}
+
+		/* unknown asus stuff, probably bcm4702 */
+		if (!strncmp(boardnum, "asusX", 5))
+			return &platforms[ASUS_4702];
+
+		if ((simple_strtoul(getvar("GemtekPmonVer"), NULL, 0) == 9) &&
+			(simple_strtoul(getvar("et0phyaddr"), NULL, 0) == 30)) {
+			if (!strncmp(getvar("ModelId"),"WE800G", 6))
+				return &platforms[WE800G];
+			else
+				return &platforms[WR850GV1];
+		}
+	}
+
+	if ((buf = (nvram_get("melco_id") ?: nvram_get("buffalo_id")))) {
+		/* Buffalo hardware, check id for specific hardware matches */
+		if (!strcmp(buf, "29bb0332"))
+			return &platforms[WBR2_G54];
+		if (!strcmp(buf, "29129"))
+			return &platforms[WLA2_G54L];
+		if (!strcmp(buf, "30189"))
+			return &platforms[WHR_HP_G54];
+		if (!strcmp(buf, "30182"))
+			return &platforms[WHR_G54S];
+		if (!strcmp(buf, "290441dd"))
+			return &platforms[WHR2_A54G54];
+	}
+
+	if (buf || !strcmp(boardnum, "00")) {/* probably buffalo */
+		if (!strncmp(boardtype, "bcm94710ap", 10))
+			return &platforms[BUFFALO_UNKNOWN_4710];
+		else
+			return &platforms[BUFFALO_UNKNOWN];
+	}
+
+	if (!strcmp(getvar("CFEver"), "MotoWRv203"))
+		return &platforms[WR850GV2];
+
+	/* not found */
+	return NULL;
+}
+
+static ssize_t diag_proc_read(struct file *file, char *buf, size_t count, loff_t *ppos);
+static ssize_t diag_proc_write(struct file *file, const char *buf, size_t count, void *data);
+static struct file_operations diag_proc_fops = {
+	read: diag_proc_read,
+	write: diag_proc_write
+};
+
+
+
+static ssize_t diag_proc_read(struct file *file, char *buf, size_t count, loff_t *ppos)
+{
+#ifdef LINUX_2_4
+	struct inode *inode = file->f_dentry->d_inode;
+	struct proc_dir_entry *dent = inode->u.generic_ip;
+#else
+	struct proc_dir_entry *dent = PDE(file->f_dentry->d_inode);
+#endif
+	char *page;
+	int len = 0;
+	
+	if ((page = kmalloc(1024, GFP_KERNEL)) == NULL)
+		return -ENOBUFS;
+	
+	if (dent->data != NULL) {
+		struct prochandler_t *handler = (struct prochandler_t *) dent->data;
+		switch (handler->type) {
+			case PROC_LED: {
+				struct led_t * led = (struct led_t *) handler->ptr;
+				if (led->flash) {
+					len = sprintf(page, "f\n");
+				} else {
+					if (led->gpio & GPIO_TYPE_EXTIF) {
+						len = sprintf(page, "%d\n", led->state);
+					} else {
+						int in = (sb_gpioin(sbh) & led->gpio ? 1 : 0);
+						int p = (led->polarity == NORMAL ? 0 : 1);
+						len = sprintf(page, "%d\n", ((in ^ p) ? 1 : 0));
+					}
+				}
+				break;
+			}
+			case PROC_MODEL:
+				len = sprintf(page, "%s\n", platform.name);
+				break;
+			case PROC_GPIOMASK:
+				len = sprintf(page, "%d\n", gpiomask);
+				break;
+		}
+	}
+	len += 1;
+
+	if (*ppos < len) {
+		len = min_t(int, len - *ppos, count);
+		if (copy_to_user(buf, (page + *ppos), len)) {
+			kfree(page);
+			return -EFAULT;
+		}
+		*ppos += len;
+	} else {
+		len = 0;
+	}
+
+	return len;
+}
+
+
+static ssize_t diag_proc_write(struct file *file, const char *buf, size_t count, void *data)
+{
+#ifdef LINUX_2_4
+	struct inode *inode = file->f_dentry->d_inode;
+	struct proc_dir_entry *dent = inode->u.generic_ip;
+#else
+	struct proc_dir_entry *dent = PDE(file->f_dentry->d_inode);
+#endif
+	char *page;
+	int ret = -EINVAL;
+
+	if ((page = kmalloc(count + 1, GFP_KERNEL)) == NULL)
+		return -ENOBUFS;
+
+	if (copy_from_user(page, buf, count)) {
+		kfree(page);
+		return -EINVAL;
+	}
+	page[count] = 0;
+	
+	if (dent->data != NULL) {
+		struct prochandler_t *handler = (struct prochandler_t *) dent->data;
+		switch (handler->type) {
+			case PROC_LED: {
+				struct led_t *led = (struct led_t *) handler->ptr;
+				int p = (led->polarity == NORMAL ? 0 : 1);
+				
+				if (!(led->gpio & GPIO_TYPE_EXTIF) && (led->gpio & gpiomask))
+					break;
+
+				if (page[0] == 'f') {
+					led->flash = 1;
+					led_flash(0);
+				} else {
+					led->flash = 0;
+					if (led->gpio & GPIO_TYPE_EXTIF) {
+						led->state = p ^ ((page[0] == '1') ? 1 : 0);
+						set_led_extif(led);
+					} else {
+						sb_gpioouten(sbh, led->gpio, led->gpio, GPIO_DRV_PRIORITY);
+						sb_gpiocontrol(sbh, led->gpio, 0, GPIO_DRV_PRIORITY);
+						sb_gpioout(sbh, led->gpio, ((p ^ (page[0] == '1')) ? led->gpio : 0), GPIO_DRV_PRIORITY);
+					}
+				}
+				break;
+			}
+			case PROC_GPIOMASK:
+				gpiomask = simple_strtoul(page, NULL, 16);
+				break;
+		}
+		ret = count;
+	}
+
+	kfree(page);
+	return ret;
+}
+
+struct event_t {
+	struct work_struct tq;
+	char buf[256];
+	char *argv[3];
+	char *envp[6];
+};
+
+static void hotplug_button(struct event_t *event)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+	call_usermodehelper (event->argv[0], event->argv, event->envp, 1);
+#else
+	call_usermodehelper (event->argv[0], event->argv, event->envp);
+#endif
+	kfree(event);
+}
+
+static void set_irqenable(int enabled)
+{
+	unsigned int coreidx;
+	unsigned long flags;
+	chipcregs_t *cc;
+
+	spin_lock_irqsave(sbh_lock, flags);
+	coreidx = sb_coreidx(sbh);
+	if ((cc = sb_setcore(sbh, SB_CC, 0))) {
+		int intmask;
+
+		intmask = readl(&cc->intmask);
+		if (enabled)
+			intmask |= CI_GPIO;
+		else
+			intmask &= ~CI_GPIO;
+		writel(intmask, &cc->intmask);
+	}
+	sb_setcoreidx(sbh, coreidx);
+	spin_unlock_irqrestore(sbh_lock, flags);
+}
+
+
+static irqreturn_t button_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct button_t *b;
+	int in = sb_gpioin(sbh);
+	struct event_t *event;
+
+	set_irqenable(0);
+	for (b = platform.buttons; b->name; b++) { 
+		if (b->gpio & gpiomask)
+			continue;
+
+		if (b->polarity != (in & b->gpio)) {
+			b->pressed ^= 1;
+
+			if ((event = (struct event_t *)kmalloc (sizeof(struct event_t), GFP_ATOMIC))) {
+				int i;
+				char *scratch = event->buf;
+
+				i = 0;
+				event->argv[i++] = hotplug_path;
+				event->argv[i++] = "button";
+				event->argv[i] = 0;
+
+				i = 0;
+				event->envp[i++] = "HOME=/";
+				event->envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
+				event->envp[i++] = scratch;
+				scratch += sprintf (scratch, "ACTION=%s", b->pressed?"pressed":"released") + 1;
+				event->envp[i++] = scratch;
+				scratch += sprintf (scratch, "BUTTON=%s", b->name) + 1;
+				event->envp[i++] = scratch;
+				scratch += sprintf (scratch, "SEEN=%ld", (jiffies - b->seen)/HZ) + 1;
+				event->envp[i] = 0;
+
+				INIT_WORK(&event->tq, (void *)(void *)hotplug_button, (void *)event);
+				schedule_work(&event->tq);
+			}
+
+			b->seen = jiffies;
+			b->polarity ^= b->gpio;
+			sb_gpiointpolarity(sbh, b->gpio, b->polarity, GPIO_DRV_PRIORITY);
+		}
+	}
+	set_irqenable(1);
+	return IRQ_HANDLED;
+}
+
+static struct timer_list led_timer = {
+	function: &led_flash
+};
+
+static void led_flash(unsigned long dummy) {
+	struct led_t *l;
+	unsigned mask = 0;
+	unsigned extif_blink = 0;
+
+	for (l = platform.leds; l->name; l++) {
+		if (l->flash) {
+			if (l->gpio & GPIO_TYPE_EXTIF) {
+				extif_blink = 1;
+				l->state = !l->state;
+				set_led_extif(l);
+			} else {
+				mask |= l->gpio;
+			}
+		}
+	}
+
+	mask &= ~gpiomask;
+	if (mask) {
+		unsigned val;
+
+		val = ~sb_gpioin(sbh);
+		val &= mask;
+
+		sb_gpioouten(sbh, mask, mask, GPIO_DRV_PRIORITY);
+		sb_gpiocontrol(sbh, mask, 0, GPIO_DRV_PRIORITY);
+		sb_gpioout(sbh, mask, val, GPIO_DRV_PRIORITY);
+	}
+	if (mask || extif_blink) {
+		mod_timer(&led_timer, jiffies + FLASH_TIME);
+	}
+}
+
+static void __init register_buttons(struct button_t *b)
+{
+	int irq = sb_irq(sbh) + 2;
+
+	request_irq(irq, button_handler, SA_SHIRQ | SA_SAMPLE_RANDOM, "gpio", button_handler);
+
+	for (; b->name; b++) {
+		if (b->gpio & gpiomask)
+			continue;
+
+		sb_gpioouten(sbh, b->gpio,0, GPIO_DRV_PRIORITY);
+		sb_gpiocontrol(sbh, b->gpio,0, GPIO_DRV_PRIORITY);
+		b->polarity = sb_gpioin(sbh) & b->gpio;
+		sb_gpiointpolarity(sbh, b->gpio, b->polarity, GPIO_DRV_PRIORITY);
+		sb_gpiointmask(sbh, b->gpio, b->gpio, GPIO_DRV_PRIORITY);
+	}
+	set_irqenable(1);
+}
+
+static void __exit unregister_buttons(struct button_t *b)
+{
+	int irq = sb_irq(sbh) + 2;
+
+	for (; b->name; b++)
+		sb_gpiointmask(sbh, b->gpio, 0, GPIO_DRV_PRIORITY);
+
+	free_irq(irq, button_handler);
+}
+
+static void __init register_leds(struct led_t *l)
+{
+	struct proc_dir_entry *p;
+
+	leds = proc_mkdir("led", diag);
+	if (!leds) 
+		return;
+
+	for(; l->name; l++) {
+		if (l->gpio & gpiomask)
+			continue;
+	
+		if (l->gpio & GPIO_TYPE_EXTIF) {
+			l->state = 0;
+			set_led_extif(l);
+		} else {
+			sb_gpioouten(sbh, l->gpio, l->gpio, GPIO_DRV_PRIORITY);
+			sb_gpiocontrol(sbh, l->gpio, 0, GPIO_DRV_PRIORITY);
+			sb_gpioout(sbh, l->gpio, (l->polarity == NORMAL)?0:l->gpio, GPIO_DRV_PRIORITY);
+		}
+
+		if ((p = create_proc_entry(l->name, S_IRUSR, leds))) {
+			l->proc.type = PROC_LED;
+			l->proc.ptr = l;
+			p->data = (void *) &l->proc;
+			p->proc_fops = &diag_proc_fops;
+		}
+	}
+}
+
+static void __exit unregister_leds(struct led_t *l)
+{
+	for(; l->name; l++)
+		remove_proc_entry(l->name, leds);
+
+	remove_proc_entry("led", diag);
+}
+
+static void __exit diag_exit(void)
+{
+
+	del_timer(&led_timer);
+
+	if (platform.buttons)
+		unregister_buttons(platform.buttons);
+
+	if (platform.leds)
+		unregister_leds(platform.leds);
+
+	remove_proc_entry("model", diag);
+	remove_proc_entry("gpiomask", diag);
+	remove_proc_entry("diag", NULL);
+}
+
+static struct prochandler_t proc_model = { .type = PROC_MODEL };
+static struct prochandler_t proc_gpiomask = { .type = PROC_GPIOMASK };
+
+static int __init diag_init(void)
+{
+	static struct proc_dir_entry *p;
+	static struct platform_t *detected;
+
+	detected = platform_detect();
+	if (!detected) {
+		printk(MODULE_NAME ": Router model not detected.\n");
+		return -ENODEV;
+	}
+	memcpy(&platform, detected, sizeof(struct platform_t));
+
+	printk(MODULE_NAME ": Detected '%s'\n", platform.name);
+
+	if (!(diag = proc_mkdir("diag", NULL))) {
+		printk(MODULE_NAME ": proc_mkdir on /proc/diag failed\n");
+		return -EINVAL;
+	}
+
+	if ((p = create_proc_entry("model", S_IRUSR, diag))) {
+		p->data = (void *) &proc_model;
+		p->proc_fops = &diag_proc_fops;
+	}
+
+	if ((p = create_proc_entry("gpiomask", S_IRUSR | S_IWUSR, diag))) {
+		p->data = (void *) &proc_gpiomask;
+		p->proc_fops = &diag_proc_fops;
+	}
+
+	if (platform.buttons)
+		register_buttons(platform.buttons);
+
+	if (platform.leds)
+		register_leds(platform.leds);
+
+	return 0;
+}
+
+module_init(diag_init);
+module_exit(diag_exit);
+
+MODULE_AUTHOR("Mike Baker, Felix Fietkau / OpenWrt.org");
+MODULE_LICENSE("GPL");