b43: HT-PHY: add place for writing HT PHY support

This is totally broken plus we do not have specs for HT PHY yet. Just
introduce place for writing driver if we discover anything.

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

drivers/net/wireless/b43/Kconfig

@@ -112,6 +112,14 @@ config B43_PHY_LP
 	  and embedded devices. It supports 802.11a/g
 	  (802.11a support is optional, and currently disabled).
 
+config B43_PHY_HT
+	bool "Support for HT-PHY devices (BROKEN)"
+	depends on B43 && BROKEN
+	---help---
+	  Support for the HT-PHY.
+
+	  Say N, this is BROKEN and crashes driver.
+
 # This config option automatically enables b43 LEDS support,
 # if it's possible.
 config B43_LEDS

drivers/net/wireless/b43/Makefile

@@ -10,6 +10,7 @@ b43-y				+= phy_a.o
 b43-$(CONFIG_B43_PHY_N)		+= phy_n.o
 b43-$(CONFIG_B43_PHY_LP)	+= phy_lp.o
 b43-$(CONFIG_B43_PHY_LP)	+= tables_lpphy.o
+b43-$(CONFIG_B43_PHY_HT)	+= phy_ht.o
 b43-y				+= sysfs.o
 b43-y				+= xmit.o
 b43-y				+= lo.o

drivers/net/wireless/b43/main.c

@@ -4096,6 +4096,12 @@ static int b43_phy_versioning(struct b43_wldev *dev)
 		if (phy_rev > 2)
 			unsupported = 1;
 		break;
+#endif
+#ifdef CONFIG_B43_PHY_HT
+	case B43_PHYTYPE_HT:
+		if (phy_rev > 1)
+			unsupported = 1;
+		break;
 #endif
 	default:
 		unsupported = 1;
@@ -4153,6 +4159,10 @@ static int b43_phy_versioning(struct b43_wldev *dev)
 		if (radio_ver != 0x2062 && radio_ver != 0x2063)
 			unsupported = 1;
 		break;
+	case B43_PHYTYPE_HT:
+		if (radio_ver != 0x2059)
+			unsupported = 1;
+		break;
 	default:
 		B43_WARN_ON(1);
 	}

drivers/net/wireless/b43/phy_common.c

@@ -31,6 +31,7 @@
 #include "phy_a.h"
 #include "phy_n.h"
 #include "phy_lp.h"
+#include "phy_ht.h"
 #include "b43.h"
 #include "main.h"
 
@@ -57,6 +58,11 @@ int b43_phy_allocate(struct b43_wldev *dev)
 	case B43_PHYTYPE_LP:
 #ifdef CONFIG_B43_PHY_LP
 		phy->ops = &b43_phyops_lp;
+#endif
+		break;
+	case B43_PHYTYPE_HT:
+#ifdef CONFIG_B43_PHY_HT
+		phy->ops = &b43_phyops_ht;
 #endif
 		break;
 	}

drivers/net/wireless/b43/phy_common.h

@@ -194,6 +194,7 @@ struct b43_phy_a;
 struct b43_phy_g;
 struct b43_phy_n;
 struct b43_phy_lp;
+struct b43_phy_ht;
 
 struct b43_phy {
 	/* Hardware operation callbacks. */
@@ -216,6 +217,8 @@ struct b43_phy {
 		struct b43_phy_n *n;
 		/* LP-PHY specific information */
 		struct b43_phy_lp *lp;
+		/* HT-PHY specific information */
+		struct b43_phy_ht *ht;
 	};
 
 	/* Band support flags. */

drivers/net/wireless/b43/phy_ht.c

@@ -0,0 +1,119 @@
+/*
+
+  Broadcom B43 wireless driver
+  IEEE 802.11n HT-PHY support
+
+  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 <linux/slab.h>
+
+#include "b43.h"
+#include "phy_ht.h"
+#include "main.h"
+
+/**************************************************
+ * Basic PHY ops.
+ **************************************************/
+
+static int b43_phy_ht_op_allocate(struct b43_wldev *dev)
+{
+	struct b43_phy_ht *phy_ht;
+
+	phy_ht = kzalloc(sizeof(*phy_ht), GFP_KERNEL);
+	if (!phy_ht)
+		return -ENOMEM;
+	dev->phy.ht = phy_ht;
+
+	return 0;
+}
+
+static void b43_phy_ht_op_prepare_structs(struct b43_wldev *dev)
+{
+	struct b43_phy *phy = &dev->phy;
+	struct b43_phy_ht *phy_ht = phy->ht;
+
+	memset(phy_ht, 0, sizeof(*phy_ht));
+}
+
+static void b43_phy_ht_op_free(struct b43_wldev *dev)
+{
+	struct b43_phy *phy = &dev->phy;
+	struct b43_phy_ht *phy_ht = phy->ht;
+
+	kfree(phy_ht);
+	phy->ht = NULL;
+}
+
+static unsigned int b43_phy_ht_op_get_default_chan(struct b43_wldev *dev)
+{
+	if (b43_current_band(dev->wl) == IEEE80211_BAND_2GHZ)
+		return 1;
+	return 36;
+}
+
+/**************************************************
+ * R/W ops.
+ **************************************************/
+
+static u16 b43_phy_ht_op_read(struct b43_wldev *dev, u16 reg)
+{
+	b43_write16(dev, B43_MMIO_PHY_CONTROL, reg);
+	return b43_read16(dev, B43_MMIO_PHY_DATA);
+}
+
+static void b43_phy_ht_op_write(struct b43_wldev *dev, u16 reg, u16 value)
+{
+	b43_write16(dev, B43_MMIO_PHY_CONTROL, reg);
+	b43_write16(dev, B43_MMIO_PHY_DATA, value);
+}
+
+static void b43_phy_ht_op_maskset(struct b43_wldev *dev, u16 reg, u16 mask,
+				 u16 set)
+{
+	b43_write16(dev, B43_MMIO_PHY_CONTROL, reg);
+	b43_write16(dev, B43_MMIO_PHY_DATA,
+		    (b43_read16(dev, B43_MMIO_PHY_DATA) & mask) | set);
+}
+
+/**************************************************
+ * PHY ops struct.
+ **************************************************/
+
+const struct b43_phy_operations b43_phyops_ht = {
+	.allocate		= b43_phy_ht_op_allocate,
+	.free			= b43_phy_ht_op_free,
+	.prepare_structs	= b43_phy_ht_op_prepare_structs,
+	/*
+	.init			= b43_phy_ht_op_init,
+	*/
+	.phy_read		= b43_phy_ht_op_read,
+	.phy_write		= b43_phy_ht_op_write,
+	.phy_maskset		= b43_phy_ht_op_maskset,
+	/*
+	.radio_read		= b43_phy_ht_op_radio_read,
+	.radio_write		= b43_phy_ht_op_radio_write,
+	.software_rfkill	= b43_phy_ht_op_software_rfkill,
+	.switch_analog		= b43_phy_ht_op_switch_analog,
+	.switch_channel		= b43_phy_ht_op_switch_channel,
+	*/
+	.get_default_chan	= b43_phy_ht_op_get_default_chan,
+	/*
+	.recalc_txpower		= b43_phy_ht_op_recalc_txpower,
+	.adjust_txpower		= b43_phy_ht_op_adjust_txpower,
+	*/
+};

drivers/net/wireless/b43/phy_ht.h

@@ -0,0 +1,19 @@
+#ifndef B43_PHY_HT_H_
+#define B43_PHY_HT_H_
+
+#include "phy_common.h"
+
+
+#define B43_PHY_HT_TABLE_ADDR			0x072 /* Table address */
+#define B43_PHY_HT_TABLE_DATALO			0x073 /* Table data low */
+#define B43_PHY_HT_TABLE_DATAHI			0x074 /* Table data high */
+
+
+struct b43_phy_ht {
+};
+
+
+struct b43_phy_operations;
+extern const struct b43_phy_operations b43_phyops_ht;
+
+#endif /* B43_PHY_HT_H_ */