b43: add bus device abstraction layer

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/Makefile

 b43-y				+= main.o
+b43-y				+= bus.o
 b43-y				+= tables.o
 b43-$(CONFIG_B43_PHY_N)		+= tables_nphy.o
 b43-$(CONFIG_B43_PHY_N)		+= radio_2055.o

drivers/net/wireless/b43/b43.h

@@ -11,6 +11,7 @@
 #include "debugfs.h"
 #include "leds.h"
 #include "rfkill.h"
+#include "bus.h"
 #include "lo.h"
 #include "phy_common.h"
 
@@ -707,7 +708,8 @@ enum {
 
 /* Data structure for one wireless device (802.11 core) */
 struct b43_wldev {
-	struct ssb_device *sdev;
+	struct ssb_device *sdev; /* TODO: remove when b43_bus_dev is ready */
+	struct b43_bus_dev *dev;
 	struct b43_wl *wl;
 
 	/* The device initialization status.

drivers/net/wireless/b43/bus.c

+/*
+
+  Broadcom B43 wireless driver
+  Bus abstraction layer
+
+  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; see the file COPYING.  If not, write to
+  the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
+  Boston, MA 02110-1301, USA.
+
+*/
+
+#include "b43.h"
+#include "bus.h"
+
+
+/* SSB */
+struct b43_bus_dev *b43_bus_dev_ssb_init(struct ssb_device *sdev)
+{
+	struct b43_bus_dev *dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+
+	dev->bus_type = B43_BUS_SSB;
+	dev->sdev = sdev;
+
+	return dev;
+}

drivers/net/wireless/b43/bus.h

+#ifndef B43_BUS_H_
+#define B43_BUS_H_
+
+enum b43_bus_type {
+	B43_BUS_SSB,
+};
+
+struct b43_bus_dev {
+	enum b43_bus_type bus_type;
+	union {
+		struct ssb_device *sdev;
+	};
+};
+
+struct b43_bus_dev *b43_bus_dev_ssb_init(struct ssb_device *sdev);
+
+#endif /* B43_BUS_H_ */

drivers/net/wireless/b43/main.c

@@ -4845,7 +4845,7 @@ static int b43_wireless_core_attach(struct b43_wldev *dev)
 	return err;
 }
 
-static void b43_one_core_detach(struct ssb_device *dev)
+static void b43_one_core_detach(struct b43_bus_dev *dev)
 {
 	struct b43_wldev *wldev;
 	struct b43_wl *wl;
@@ -4853,17 +4853,17 @@ static void b43_one_core_detach(struct ssb_device *dev)
 	/* Do not cancel ieee80211-workqueue based work here.
 	 * See comment in b43_remove(). */
 
-	wldev = ssb_get_drvdata(dev);
+	wldev = ssb_get_drvdata(dev->sdev);
 	wl = wldev->wl;
 	b43_debugfs_remove_device(wldev);
 	b43_wireless_core_detach(wldev);
 	list_del(&wldev->list);
 	wl->nr_devs--;
-	ssb_set_drvdata(dev, NULL);
+	ssb_set_drvdata(dev->sdev, NULL);
 	kfree(wldev);
 }
 
-static int b43_one_core_attach(struct ssb_device *dev, struct b43_wl *wl)
+static int b43_one_core_attach(struct b43_bus_dev *dev, struct b43_wl *wl)
 {
 	struct b43_wldev *wldev;
 	int err = -ENOMEM;
@@ -4873,7 +4873,8 @@ static int b43_one_core_attach(struct ssb_device *dev, struct b43_wl *wl)
 		goto out;
 
 	wldev->use_pio = b43_modparam_pio;
-	wldev->sdev = dev;
+	wldev->dev = dev;
+	wldev->sdev = dev->sdev; /* TODO: Remove when not needed */
 	wldev->wl = wl;
 	b43_set_status(wldev, B43_STAT_UNINIT);
 	wldev->bad_frames_preempt = modparam_bad_frames_preempt;
@@ -4885,7 +4886,7 @@ static int b43_one_core_attach(struct ssb_device *dev, struct b43_wl *wl)
 
 	list_add(&wldev->list, &wl->devlist);
 	wl->nr_devs++;
-	ssb_set_drvdata(dev, wldev);
+	ssb_set_drvdata(dev->sdev, wldev);
 	b43_debugfs_add_device(wldev);
 
       out:
@@ -4926,11 +4927,11 @@ static void b43_sprom_fixup(struct ssb_bus *bus)
 	}
 }
 
-static void b43_wireless_exit(struct ssb_device *dev, struct b43_wl *wl)
+static void b43_wireless_exit(struct b43_bus_dev *dev, struct b43_wl *wl)
 {
 	struct ieee80211_hw *hw = wl->hw;
 
-	ssb_set_devtypedata(dev, NULL);
+	ssb_set_devtypedata(dev->sdev, NULL);
 	ieee80211_free_hw(hw);
 }
 
@@ -4985,10 +4986,13 @@ static struct b43_wl *b43_wireless_init(struct ssb_device *dev)
 static
 int b43_ssb_probe(struct ssb_device *sdev, const struct ssb_device_id *id)
 {
+	struct b43_bus_dev *dev;
 	struct b43_wl *wl;
 	int err;
 	int first = 0;
 
+	dev = b43_bus_dev_ssb_init(sdev);
+
 	wl = ssb_get_devtypedata(sdev);
 	if (!wl) {
 		/* Probing the first core. Must setup common struct b43_wl */
@@ -5002,7 +5006,7 @@ int b43_ssb_probe(struct ssb_device *sdev, const struct ssb_device_id *id)
 		ssb_set_devtypedata(sdev, wl);
 		B43_WARN_ON(ssb_get_devtypedata(sdev) != wl);
 	}
-	err = b43_one_core_attach(sdev, wl);
+	err = b43_one_core_attach(dev, wl);
 	if (err)
 		goto err_wireless_exit;
 
@@ -5017,10 +5021,10 @@ int b43_ssb_probe(struct ssb_device *sdev, const struct ssb_device_id *id)
 	return err;
 
       err_one_core_detach:
-	b43_one_core_detach(sdev);
+	b43_one_core_detach(dev);
       err_wireless_exit:
 	if (first)
-		b43_wireless_exit(sdev, wl);
+		b43_wireless_exit(dev, wl);
 	return err;
 }
 
@@ -5043,14 +5047,14 @@ static void b43_ssb_remove(struct ssb_device *sdev)
 		ieee80211_unregister_hw(wl->hw);
 	}
 
-	b43_one_core_detach(sdev);
+	b43_one_core_detach(wldev->dev);
 
 	if (list_empty(&wl->devlist)) {
 		b43_leds_unregister(wl);
 		/* Last core on the chip unregistered.
 		 * We can destroy common struct b43_wl.
 		 */
-		b43_wireless_exit(sdev, wl);
+		b43_wireless_exit(wldev->dev, wl);
 	}
 }