broadcom-wl: make it work on the RT-N16 and other device using the BCMA bus - refresh and reorder patches - introduce a unified BCMA/SSB glue driver to accomodate for both bus types on brcm47xx - extend wlunbind init script to detach device from bcma-pci-bridge as well

SVN-Revision: 27751

9 files changed, 568 insertions, 10 deletions

diff --git a/package/broadcom-wl/Makefile b/package/broadcom-wl/Makefile
index 9ece393..9500331 100644
--- a/package/broadcom-wl/Makefile
+++ b/package/broadcom-wl/Makefile
@@ -10,7 +10,7 @@ include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=broadcom-wl
 PKG_VERSION:=5.10.56.27.3
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION)_$(ARCH).tar.bz2
 PKG_SOURCE_URL:=http://downloads.openwrt.org/sources
@@ -34,8 +34,8 @@ define KernelPackage/brcm-wl/Default
   SECTION:=kernel
   DEPENDS:=@TARGET_brcm47xx||TARGET_brcm63xx +wireless-tools
   TITLE:=Kernel driver for BCM43xx chipsets
-  FILES:=$(PKG_BUILD_DIR)/driver$(1)/wl.ko
-  AUTOLOAD:=$(call AutoLoad,30,wl)
+  FILES:=$(PKG_BUILD_DIR)/driver$(1)/wl.ko $(PKG_BUILD_DIR)/glue/wl_glue.ko
+  AUTOLOAD:=$(call AutoLoad,30,wl_glue wl)
 endef
 
 define KernelPackage/brcm-wl/Default/description
@@ -100,6 +100,7 @@ MAKE_KMOD := $(MAKE) -C "$(LINUX_DIR)" \
 define Build/Prepare
 	$(call Build/Prepare/Default)
 	$(CP) $(PKG_BUILD_DIR)/driver $(PKG_BUILD_DIR)/driver-mini
+	$(CP) ./src/glue $(PKG_BUILD_DIR)/glue
 endef
 
 define Build/Compile
@@ -115,6 +116,11 @@ define Build/Compile
 		BUILD_TYPE="wl_apsta_mini" \
 		modules
 
+	# Compile glue driver
+	$(MAKE_KMOD) -C "$(LINUX_DIR)" \
+		SUBDIRS="$(PKG_BUILD_DIR)/glue" \
+		modules                                        
+
 	# Compile libshared
 	$(MAKE) -C $(PKG_BUILD_DIR)/shared \
 		$(TARGET_CONFIGURE_OPTS) \
diff --git a/package/broadcom-wl/files/etc/init.d/wlunbind b/package/broadcom-wl/files/etc/init.d/wlunbind
index 80a8f0e..0a29db5 100755
--- a/package/broadcom-wl/files/etc/init.d/wlunbind
+++ b/package/broadcom-wl/files/etc/init.d/wlunbind
@@ -1,17 +1,18 @@
 #!/bin/sh /etc/rc.common
-# Copyright (C) 2010 OpenWrt.org
+# Copyright (C) 2010-2011 OpenWrt.org
 
 START=09
 
-boot() {
-	local sysfs=/sys/bus/pci/drivers/b43-pci-bridge
+unbind_driver() {
+	local driver="$1"
+	local sysfs="/sys/bus/pci/drivers/$driver"
 	if [ -d "$sysfs" ]; then
 		local lnk
 		for lnk in $sysfs/*; do
 			[ -h "$lnk" ] || continue
 			case "${lnk##*/}" in
 				*:*:*.*)
-					logger "Unbinding WL PCI device ${lnk##*/} from B43 SSB bridge"
+					logger "Unbinding WL PCI device ${lnk##*/} from $driver"
 					echo -n "${lnk##*/}" > "$sysfs/unbind"
 				;;
 			esac
@@ -19,5 +20,10 @@ boot() {
 	fi
 }
 
+boot() {
+	unbind_driver b43-pci-bridge
+	unbind_driver bcma-pci-bridge
+}
+
 start() { :; }
 stop() { :; }
diff --git a/package/broadcom-wl/patches/006-fix-mem-leak-on-unload.patch b/package/broadcom-wl/patches/005-fix-mem-leak-on-unload.patch
index 41c246f..41c246f 100644
--- a/package/broadcom-wl/patches/006-fix-mem-leak-on-unload.patch
+++ b/package/broadcom-wl/patches/005-fix-mem-leak-on-unload.patch
diff --git a/package/broadcom-wl/patches/006-generic-dma-api.patch b/package/broadcom-wl/patches/006-generic-dma-api.patch
index a4ac1d8..a90bbe1 100644
--- a/package/broadcom-wl/patches/006-generic-dma-api.patch
+++ b/package/broadcom-wl/patches/006-generic-dma-api.patch
@@ -11,8 +11,8 @@ Signed-off-by: George Kashperko <george@znau.edu.ua>
 ---
  driver/linux_osl.c |   28 +++++++++++++++++++++++-----
  1 file changed, 23 insertions(+), 5 deletions(-)
---- broadcom-wl-5.10.56.27.3.orig/driver/linux_osl.c	2011-05-17 23:40:00.000000000 +0300
-+++ broadcom-wl-5.10.56.27.3/driver/linux_osl.c	2011-05-17 23:46:01.000000000 +0300
+--- a/driver/linux_osl.c
++++ b/driver/linux_osl.c
 @@ -25,6 +25,9 @@
  #include <asm/paccess.h>
  #endif /* mips */
diff --git a/package/broadcom-wl/patches/007-add-bcma-support.patch b/package/broadcom-wl/patches/007-add-bcma-support.patch
new file mode 100644
index 0000000..2639abc
--- /dev/null
+++ b/package/broadcom-wl/patches/007-add-bcma-support.patch
@@ -0,0 +1,184 @@
+--- a/driver/wl_linux.c
++++ b/driver/wl_linux.c
+@@ -85,10 +85,9 @@ typedef void wlc_hw_info_t;
+ #include <bcmjtag.h>
+ #endif	/* BCMJTAG */
+ 
+-
+-#ifdef CONFIG_SSB
+-#include <linux/ssb/ssb.h>
+-#endif
++#if defined(CONFIG_SSB) || defined(CONFIG_BCMA)
++#include <wl_glue.h>
++#endif /* defined(CONFIG_SSB) || defined(CONFIG_BCMA) */
+ 
+ /* Linux wireless extension support */
+ #ifdef CONFIG_WIRELESS_EXT
+@@ -997,62 +996,32 @@ static struct pci_driver wl_pci_driver =
+ #endif	/* CONFIG_PCI */
+ #endif  
+ 
++#ifdef BCMJTAG
++static bcmjtag_driver_t wl_jtag_driver = {
++		wl_jtag_probe,
++		wl_jtag_detach,
++		wl_jtag_poll,
++		};
++#endif	/* BCMJTAG */
+ 
+-static int wl_ssb_probe(struct ssb_device *dev, const struct ssb_device_id *id)
++#if defined(CONFIG_SSB) || defined(CONFIG_BCMA)
++static void * glue_attach_cb(u16 vendor, u16 device,
++                                ulong mmio, void *dev, u32 irq)
+ {
+-	wl_info_t *wl;
+-	void *mmio;
+-
+-	if (dev->bus->bustype != SSB_BUSTYPE_SSB) {
+-		printk("Attaching to SSB behind PCI is not supported. Please remove the b43 ssb bridge\n");
+-		return -EINVAL;
+-	}
+-
+-	mmio = (void *) 0x18000000 + dev->core_index * 0x1000;
+-	wl = wl_attach(id->vendor, id->coreid, (ulong) mmio, SI_BUS, dev, dev->irq);
+-	if (!wl) {
+-		printk("wl_attach failed\n");
+-		return -ENODEV;
+-	}
+-
+-	ssb_set_drvdata(dev, wl);
+-
+-	return 0;
++	return wl_attach(vendor, device, mmio, SI_BUS, dev, irq);
+ }
+ 
+-static void wl_ssb_remove(struct ssb_device *dev)
++static void glue_remove_cb(void *wldev)
+ {
+-	wl_info_t *wl = (wl_info_t *) ssb_get_drvdata(dev);
++	wl_info_t *wl = (wl_info_t *)wldev;
+ 
+ 	WL_LOCK(wl);
+ 	WL_APSTA_UPDN(("wl%d (%s): wl_remove() -> wl_down()\n", wl->pub->unit, wl->dev->name));
+ 	wl_down(wl);
+ 	WL_UNLOCK(wl);
+ 	wl_free(wl);
+-	ssb_set_drvdata(dev, NULL);
+ }
+-
+-static const struct ssb_device_id wl_ssb_tbl[] = {
+-	SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, SSB_ANY_REV),
+-	SSB_DEVTABLE_END
+-};
+-
+-#ifdef CONFIG_SSB
+-static struct ssb_driver wl_ssb_driver = {
+-	.name	= KBUILD_MODNAME,
+-	.id_table = wl_ssb_tbl,
+-	.probe = wl_ssb_probe,
+-	.remove = wl_ssb_remove,
+-};
+-#endif
+-
+-#ifdef BCMJTAG
+-static bcmjtag_driver_t wl_jtag_driver = {
+-		wl_jtag_probe,
+-		wl_jtag_detach,
+-		wl_jtag_poll,
+-		};
+-#endif	/* BCMJTAG */
++#endif/* defined(CONFIG_SSB) || defined(CONFIG_BCMA) */
+ 
+ 
+ /** 
+@@ -1067,11 +1036,13 @@ wl_module_init(void)
+ {
+ 	int error = -ENODEV;
+ 
+-#ifdef CONFIG_SSB
+-	error = ssb_driver_register(&wl_ssb_driver);
++#if defined(CONFIG_SSB) || defined(CONFIG_BCMA)
++	wl_glue_set_attach_callback(&glue_attach_cb);
++	wl_glue_set_remove_callback(&glue_remove_cb);
++	error = wl_glue_register();
+ 	if (error)
+ 		return error;
+-#endif	/* CONFIG_SSB */
++#endif /* defined(CONFIG_SSB) || defined(CONFIG_BCMA) */
+ 
+ #ifdef CONFIG_PCI
+ 	error = pci_register_driver(&wl_pci_driver);
+@@ -1082,7 +1053,9 @@ wl_module_init(void)
+ 	return 0;
+ 
+ error_pci:
+-	ssb_driver_unregister(&wl_ssb_driver);
++#if defined(CONFIG_SSB) || defined(CONFIG_BCMA)
++	wl_glue_unregister();
++#endif /* defined(CONFIG_SSB) || defined(CONFIG_BCMA) */
+ 	return error;
+ }
+ 
+@@ -1099,9 +1072,9 @@ wl_module_exit(void)
+ #ifdef CONFIG_PCI
+ 	pci_unregister_driver(&wl_pci_driver);
+ #endif	/* CONFIG_PCI */
+-#ifdef CONFIG_SSB
+-	ssb_driver_unregister(&wl_ssb_driver);
+-#endif	/* CONFIG_SSB */
++#if defined(CONFIG_SSB) || defined(CONFIG_BCMA)
++	wl_glue_unregister();
++#endif /* defined(CONFIG_SSB) || defined(CONFIG_BCMA) */
+ }
+ 
+ module_init(wl_module_init);
+--- a/driver/linux_osl.c
++++ b/driver/linux_osl.c
+@@ -25,9 +25,9 @@
+ #include <asm/paccess.h>
+ #endif /* mips */
+ #include <pcicfg.h>
+-#ifdef CONFIG_SSB
+-#include <linux/ssb/ssb.h>
+-#endif
++#if defined(CONFIG_SSB) || defined(CONFIG_BCMA)
++#include <wl_glue.h>
++#endif /* defined(CONFIG_SSB) || defined(CONFIG_BCMA) */
+ 
+ #define PCI_CFG_RETRY 		10
+ 
+@@ -370,15 +370,17 @@ osl_dma_consistent_align(void)
+ static struct device *
+ osl_get_dmadev(osl_t *osh)
+ {
+-#ifdef CONFIG_SSB
++#if defined(CONFIG_SSB) || defined(CONFIG_BCMA)
+ 	if (osh->bustype == SI_BUS) {
+-		/* This can be SiliconBackplane emulated as pci with Broadcom or
+-		 * ssb device. Less harmful is to check for pci_bus_type and if
+-		 * no match then assume we got ssb */
++		/* This can be SiliconBackplane emulated as pci with Broadcom,
++		 * ssb or bcma device. Less harmful is to check for pci_bus_type and if
++		 * no match then assume we got either ssb or bcma */
+ 		if (((struct pci_dev *)osh->pdev)->dev.bus != &pci_bus_type)
+-			return ((struct ssb_device *)osh->pdev)->dma_dev;
++		{
++			return wl_glue_get_dmadev(osh->pdev);
++		}
+ 	}
+-#endif
++#endif /* defined(CONFIG_SSB) || defined(CONFIG_BCMA) */
+ 	return &((struct pci_dev *)osh->pdev)->dev;
+ }
+ 
+--- a/driver/Makefile
++++ b/driver/Makefile
+@@ -1,7 +1,7 @@
+ BUILD_TYPE=wl_apsta
+ include $(src)/$(BUILD_TYPE)/buildflags.mk
+ 
+-EXTRA_CFLAGS += -I$(src)/include -I$(src) -DBCMDRIVER $(WLFLAGS)
++EXTRA_CFLAGS += -I$(src)/include -I$(src) -I$(realpath $(src)/../glue) -DBCMDRIVER $(WLFLAGS)
+ 
+ wl-objs := $(BUILD_TYPE)/wl_prebuilt.o wl_iw.o wl_linux.o linux_osl.o siutils.o aiutils.o hndpmu.o bcmutils.o sbutils.o nicpci.o hnddma.o bcmsrom.o nvram_stub.o
+ 
diff --git a/package/broadcom-wl/patches/910-fallback-sprom.patch b/package/broadcom-wl/patches/910-fallback-sprom.patch
index 407ec5a..749ecbf 100644
--- a/package/broadcom-wl/patches/910-fallback-sprom.patch
+++ b/package/broadcom-wl/patches/910-fallback-sprom.patch
@@ -23,7 +23,7 @@
  	/*
  	 * Apply CRC over SROM content regardless SROM is present or not,
  	 * and use variable <devpath>sromrev's existance in flash to decide
-@@ -2120,6 +2130,58 @@ BCMATTACHFN(initvars_srom_pci)(si_t *sih
+@@ -2120,6 +2129,58 @@ BCMATTACHFN(initvars_srom_pci)(si_t *sih
  			goto varscont;
  		}
  
diff --git a/package/broadcom-wl/src/glue/Makefile b/package/broadcom-wl/src/glue/Makefile
new file mode 100644
index 0000000..81f0c8a
--- /dev/null
+++ b/package/broadcom-wl/src/glue/Makefile
@@ -0,0 +1,17 @@
+#
+# Makefile for wl_glue driver
+#
+# Copyright (C) 2011 Jo-Philipp Wich <jow@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 := wl_glue.o
+
+ifeq ($(MAKING_MODULES),1)
+-include $(TOPDIR)/Rules.make
+endif
+
diff --git a/package/broadcom-wl/src/glue/wl_glue.c b/package/broadcom-wl/src/glue/wl_glue.c
new file mode 100644
index 0000000..18e2b3a
--- /dev/null
+++ b/package/broadcom-wl/src/glue/wl_glue.c
@@ -0,0 +1,323 @@
+/*
+ * wl_glue.c: Broadcom WL support module providing a unified SSB/BCMA handling.
+ * Copyright (C) 2011 Jo-Philipp Wich <jow@openwrt.org>
+ */
+
+#include "wl_glue.h"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#ifdef CONFIG_BCM47XX
+#include <bcm47xx.h>
+#endif
+
+#ifdef CONFIG_SSB
+#include <linux/ssb/ssb.h>
+#endif
+
+#ifdef CONFIG_BCMA
+#include <linux/bcma/bcma.h>
+#endif
+
+MODULE_AUTHOR("Jo-Philipp Wich (jow@openwrt.org)");
+MODULE_DESCRIPTION("Broadcom WL SSB/BCMA compatibility layer");
+MODULE_LICENSE("GPL");
+
+static wl_glue_attach_cb_t attach_cb = NULL;
+static wl_glue_remove_cb_t remove_cb = NULL;
+static enum wl_glue_bus_type active_bus_type = WL_GLUE_BUS_TYPE_UNSPEC;
+static int wl_glue_attached = 0;
+
+
+#ifdef CONFIG_SSB
+static int wl_glue_ssb_probe(struct ssb_device *dev, const struct ssb_device_id *id)
+{
+	void *mmio;
+	void *wldev;
+
+	if (!attach_cb)
+	{
+		pr_err("No attach callback registered\n");
+		return -ENOSYS;
+	}
+
+	if (dev->bus->bustype != SSB_BUSTYPE_SSB)
+	{
+		pr_err("Attaching to SSB behind PCI is not supported. Please remove the b43 ssb bridge\n");
+		return -EINVAL;
+	}
+
+	mmio = (void *) 0x18000000 + dev->core_index * 0x1000;
+	wldev = attach_cb(id->vendor, id->coreid, (ulong)mmio, dev, dev->irq);
+
+	if (!wldev)
+	{
+		pr_err("The attach callback failed, SSB probe aborted\n");
+		return -ENODEV;
+	}
+
+	ssb_set_drvdata(dev, wldev);
+	return 0;
+}
+
+static void wl_glue_ssb_remove(struct ssb_device *dev)
+{
+	void *wldev = ssb_get_drvdata(dev);
+
+	if (remove_cb)
+		remove_cb(wldev);
+
+	ssb_set_drvdata(dev, NULL);
+}
+
+static const struct ssb_device_id wl_glue_ssb_tbl[] = {
+	SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, SSB_ANY_REV),
+	SSB_DEVTABLE_END
+};
+
+static struct ssb_driver wl_glue_ssb_driver = {
+	.name     = KBUILD_MODNAME,
+	.id_table = wl_glue_ssb_tbl,
+	.probe    = wl_glue_ssb_probe,
+	.remove   = wl_glue_ssb_remove,
+};
+#endif /* CONFIG_SSB */
+
+#ifdef CONFIG_BCMA
+static int wl_glue_bcma_probe(struct bcma_device *dev)
+{
+	void *mmio;
+	void *wldev;
+
+	if (!attach_cb)
+	{
+		pr_err("No attach callback registered\n");
+		return -ENOSYS;
+	}
+
+	if (dev->bus->hosttype != BCMA_HOSTTYPE_SOC)
+	{
+		pr_err("Unsupported BCMA bus type %d\n", dev->bus->hosttype);
+		return -EINVAL;
+	}
+
+	/*
+	 * NB:
+	 * 0x18000000 = BCMA_ADDR_BASE
+	 * 0x1000     = BCMA_CORE_SIZE
+	 */
+
+	mmio = (void *) 0x18000000 + dev->core_index * 0x1000;
+	wldev = attach_cb(dev->id.manuf, dev->id.id, (ulong)mmio, dev, dev->irq);
+
+	if (!wldev)
+	{
+		pr_err("The attach callback failed, BCMA probe aborted\n");
+		return -ENODEV;
+	}
+
+	bcma_set_drvdata(dev, wldev);
+	return 0;
+}
+
+static void wl_glue_bcma_remove(struct bcma_device *dev)
+{
+	void *wldev = bcma_get_drvdata(dev);
+
+	if (remove_cb)
+		remove_cb(wldev);
+
+	bcma_set_drvdata(dev, NULL);
+}
+
+static const struct bcma_device_id wl_glue_bcma_tbl[] = {
+	BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, BCMA_ANY_REV, BCMA_ANY_CLASS),
+	BCMA_CORETABLE_END
+};
+
+static struct bcma_driver wl_glue_bcma_driver = {
+	.name     = KBUILD_MODNAME,
+	.id_table = wl_glue_bcma_tbl,
+	.probe    = wl_glue_bcma_probe,
+	.remove   = wl_glue_bcma_remove,
+};
+#endif /* CONFIG_BCMA */
+
+
+void wl_glue_set_attach_callback(wl_glue_attach_cb_t cb)
+{
+	attach_cb = cb;
+}
+EXPORT_SYMBOL(wl_glue_set_attach_callback);
+
+void wl_glue_set_remove_callback(wl_glue_remove_cb_t cb)
+{
+	remove_cb = cb;
+}
+EXPORT_SYMBOL(wl_glue_set_remove_callback);
+
+int wl_glue_register(void)
+{
+	int err;
+
+	switch(active_bus_type)
+	{
+#ifdef CONFIG_SSB
+	case WL_GLUE_BUS_TYPE_SSB:
+		err = ssb_driver_register(&wl_glue_ssb_driver);
+		break;
+#endif /* CONFIG_SSB */
+
+#ifdef CONFIG_BCMA
+	case WL_GLUE_BUS_TYPE_BCMA:
+		err = bcma_driver_register(&wl_glue_bcma_driver);
+		break;
+#endif /* CONFIG_BCMA */
+
+	default:
+		pr_err("Not attaching through glue driver due to unsupported bus\n");
+		err = -ENOSYS;
+		break;
+	}
+
+	if (!err)
+	{
+		pr_info("SSB/BCMA glue driver successfully attached\n");
+		wl_glue_attached = 1;
+	}
+
+	return err;
+}
+EXPORT_SYMBOL(wl_glue_register);
+
+int wl_glue_unregister(void)
+{
+	int err;
+
+	if (!wl_glue_attached)
+		return -ENOSYS;
+
+	switch (active_bus_type)
+	{
+#ifdef CONFIG_SSB
+	case WL_GLUE_BUS_TYPE_SSB:
+		ssb_driver_unregister(&wl_glue_ssb_driver);
+		err = 0;
+		break;
+#endif /* CONFIG_SSB */
+
+#ifdef CONFIG_BCMA
+	case WL_GLUE_BUS_TYPE_BCMA:
+		bcma_driver_unregister(&wl_glue_bcma_driver);
+		err = 0;
+		break;
+#endif /* CONFIG_BCMA */
+
+	default:
+		pr_err("Not removing glue driver due to unsupported bus\n");
+		err = -ENOSYS;
+		break;
+	}
+
+	if (!err)
+	{
+		pr_info("SSB/BCMA glue driver successfully detached\n");
+		wl_glue_attached = 0;
+	}
+
+	return err;
+}
+EXPORT_SYMBOL(wl_glue_unregister);
+
+struct device * wl_glue_get_dmadev(void *dev)
+{
+	struct device *dma_dev;
+
+	if (!wl_glue_attached)
+	{
+		BUG();
+		return NULL;
+	}
+
+	switch (active_bus_type)
+	{
+#ifdef CONFIG_SSB
+	case WL_GLUE_BUS_TYPE_SSB:
+		dma_dev = ((struct ssb_device *)dev)->dma_dev;
+		break;
+#endif /* CONFIG_SSB */
+
+#ifdef CONFIG_BCMA
+	case WL_GLUE_BUS_TYPE_BCMA:
+		dma_dev = ((struct bcma_device *)dev)->dma_dev;
+		break;
+#endif /* CONFIG_BCMA */
+
+	default:
+		BUG();
+		dma_dev = NULL;
+		break;
+	}
+
+	return dma_dev;
+}
+EXPORT_SYMBOL(wl_glue_get_dmadev);
+
+
+static int __init wl_glue_init(void)
+{
+#ifdef CONFIG_BCM47XX
+	/*
+	 * BCM47xx currently supports either SSB or BCMA bus,
+	 * determine the used one from the info set by the
+	 * platform setup code.
+	 */
+	switch (bcm47xx_active_bus_type)
+	{
+#ifdef CONFIG_SSB
+	case BCM47XX_BUS_TYPE_SSB:
+		active_bus_type = WL_GLUE_BUS_TYPE_SSB;
+		break;
+#endif /* CONFIG_SSB */
+
+#ifdef CONFIG_BCMA
+	case BCM47XX_BUS_TYPE_BCMA:
+		active_bus_type = WL_GLUE_BUS_TYPE_BCMA;
+		break;
+#endif /* CONFIG_BCMA */
+	}
+#endif /* CONFIG_BCM47XX */
+
+#ifdef CONFIG_BCM63XX
+#ifdef CONFIG_SSB
+	/*
+	 * BCM63xx currently only uses SSB, so assume that.
+	 */
+	active_bus_type = WL_GLUE_BUS_TYPE_SSB;
+#endif /* CONFIG_SSB */
+#endif /* CONFIG_BCM63XX */
+
+	/* do not fail here, let wl_glue_register() return -ENOSYS later */
+	if (active_bus_type == WL_GLUE_BUS_TYPE_UNSPEC)
+		pr_err("Unable to determine used system bus type\n");
+
+	return 0;
+}
+
+static void __exit wl_glue_exit(void)
+{
+	if (wl_glue_attached)
+	{
+		if (wl_glue_unregister())
+			pr_err("Failed to unregister glue driver\n");
+
+		wl_glue_attached = 0;
+	}
+
+	return;
+}
+
+module_init(wl_glue_init);
+module_exit(wl_glue_exit);
diff --git a/package/broadcom-wl/src/glue/wl_glue.h b/package/broadcom-wl/src/glue/wl_glue.h
new file mode 100644
index 0000000..b3c8aa3
--- /dev/null
+++ b/package/broadcom-wl/src/glue/wl_glue.h
@@ -0,0 +1,22 @@
+/*
+ * wl_glue.h: Broadcom WL support module providing a unified SSB/BCMA handling.
+ * Copyright (C) 2011 Jo-Philipp Wich <jow@openwrt.org>
+ */
+
+#include <linux/types.h>
+
+typedef void * (*wl_glue_attach_cb_t)(u16, u16, ulong, void *, u32);
+typedef void (*wl_glue_remove_cb_t)(void *);
+
+enum wl_glue_bus_type {
+	WL_GLUE_BUS_TYPE_UNSPEC,
+	WL_GLUE_BUS_TYPE_SSB,
+	WL_GLUE_BUS_TYPE_BCMA
+};
+
+extern void wl_glue_set_attach_callback(wl_glue_attach_cb_t cb);
+extern void wl_glue_set_remove_callback(wl_glue_remove_cb_t cb);
+extern int wl_glue_register(void);
+extern int wl_glue_unregister(void);
+extern struct device * wl_glue_get_dmadev(void *);
+