b43: AC-PHY: prepare place for developing new PHY support

There are new (not anymore?) Broadcom 802.11ac wireless cards based on
chipsets like BCM4352 and BCM4360. They use a new PHY type (called
simply AC) that will require new specific code.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

7 files changed, 160 insertions, 1 deletions

diff --git a/drivers/net/wireless/b43/Kconfig b/drivers/net/wireless/b43/Kconfig
index 64a5b672e30a..759fb8d41fc9 100644
--- a/drivers/net/wireless/b43/Kconfig
+++ b/drivers/net/wireless/b43/Kconfig
@@ -166,6 +166,15 @@ config B43_PHY_LCN
 
           Say N, this is BROKEN and crashes driver.
 
+config B43_PHY_AC
+        bool "Support for AC-PHY (802.11ac) devices (BROKEN)"
+        depends on B43 && B43_BCMA && BROKEN
+        ---help---
+          This PHY type can be found in the following chipsets:
+          PCI: BCM4352, BCM4360
+
+          Say N, this is BROKEN and crashes driver.
+
 # This config option automatically enables b43 LEDS support,
 # if it's possible.
 config B43_LEDS
diff --git a/drivers/net/wireless/b43/Makefile b/drivers/net/wireless/b43/Makefile
index 9f7965aae93d..c624d4d90e4f 100644
--- a/drivers/net/wireless/b43/Makefile
+++ b/drivers/net/wireless/b43/Makefile
@@ -13,6 +13,7 @@ b43-$(CONFIG_B43_PHY_HT)	+= phy_ht.o
 b43-$(CONFIG_B43_PHY_HT)        += tables_phy_ht.o
 b43-$(CONFIG_B43_PHY_HT)        += radio_2059.o
 b43-$(CONFIG_B43_PHY_LCN)       += phy_lcn.o tables_phy_lcn.o
+b43-$(CONFIG_B43_PHY_AC)        += phy_ac.o
 b43-y                           += sysfs.o
 b43-y                           += xmit.o
 b43-y                           += dma.o
diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index 1784933573e4..2c9088633ec6 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -4544,6 +4544,12 @@ static int b43_phy_versioning(struct b43_wldev *dev)
                         unsupported = 1;
                 break;
 #endif
+#ifdef CONFIG_B43_PHY_AC
+        case B43_PHYTYPE_AC:
+                if (phy_rev > 1)
+                        unsupported = 1;
+                break;
+#endif
         default:
                 unsupported = 1;
         }
@@ -4640,6 +4646,10 @@ static int b43_phy_versioning(struct b43_wldev *dev)
                 if (radio_id != 0x2064)
                         unsupported = 1;
                 break;
+        case B43_PHYTYPE_AC:
+                if (radio_id != 0x2069)
+                        unsupported = 1;
+                break;
         default:
                 B43_WARN_ON(1);
         }
diff --git a/drivers/net/wireless/b43/phy_ac.c b/drivers/net/wireless/b43/phy_ac.c
new file mode 100644
index 000000000000..e75633d67938
--- /dev/null
+++ b/drivers/net/wireless/b43/phy_ac.c
@@ -0,0 +1,92 @@
+/*
+ * Broadcom B43 wireless driver
+ * IEEE 802.11ac AC-PHY support
+ *
+ * Copyright (c) 2015 Rafał Miłecki <zajec5@gmail.com>
+ *
+ * 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.
+ */
+
+#include "b43.h"
+#include "phy_ac.h"
+
+/**************************************************
+ * Basic PHY ops
+ **************************************************/
+
+static int b43_phy_ac_op_allocate(struct b43_wldev *dev)
+{
+        struct b43_phy_ac *phy_ac;
+
+        phy_ac = kzalloc(sizeof(*phy_ac), GFP_KERNEL);
+        if (!phy_ac)
+                return -ENOMEM;
+        dev->phy.ac = phy_ac;
+
+        return 0;
+}
+
+static void b43_phy_ac_op_free(struct b43_wldev *dev)
+{
+        struct b43_phy *phy = &dev->phy;
+        struct b43_phy_ac *phy_ac = phy->ac;
+
+        kfree(phy_ac);
+        phy->ac = NULL;
+}
+
+static void b43_phy_ac_op_maskset(struct b43_wldev *dev, u16 reg, u16 mask,
+                                  u16 set)
+{
+        b43_write16f(dev, B43_MMIO_PHY_CONTROL, reg);
+        b43_write16(dev, B43_MMIO_PHY_DATA,
+                    (b43_read16(dev, B43_MMIO_PHY_DATA) & mask) | set);
+}
+
+static u16 b43_phy_ac_op_radio_read(struct b43_wldev *dev, u16 reg)
+{
+        b43_write16f(dev, B43_MMIO_RADIO24_CONTROL, reg);
+        return b43_read16(dev, B43_MMIO_RADIO24_DATA);
+}
+
+static void b43_phy_ac_op_radio_write(struct b43_wldev *dev, u16 reg,
+                                      u16 value)
+{
+        b43_write16f(dev, B43_MMIO_RADIO24_CONTROL, reg);
+        b43_write16(dev, B43_MMIO_RADIO24_DATA, value);
+}
+
+static unsigned int b43_phy_ac_op_get_default_chan(struct b43_wldev *dev)
+{
+        if (b43_current_band(dev->wl) == IEEE80211_BAND_2GHZ)
+                return 11;
+        return 36;
+}
+
+static enum b43_txpwr_result
+b43_phy_ac_op_recalc_txpower(struct b43_wldev *dev, bool ignore_tssi)
+{
+        return B43_TXPWR_RES_DONE;
+}
+
+static void b43_phy_ac_op_adjust_txpower(struct b43_wldev *dev)
+{
+}
+
+/**************************************************
+ * PHY ops struct
+ **************************************************/
+
+const struct b43_phy_operations b43_phyops_ac = {
+        .allocate               = b43_phy_ac_op_allocate,
+        .free                   = b43_phy_ac_op_free,
+        .phy_maskset            = b43_phy_ac_op_maskset,
+        .radio_read             = b43_phy_ac_op_radio_read,
+        .radio_write            = b43_phy_ac_op_radio_write,
+        .get_default_chan       = b43_phy_ac_op_get_default_chan,
+        .recalc_txpower         = b43_phy_ac_op_recalc_txpower,
+        .adjust_txpower         = b43_phy_ac_op_adjust_txpower,
+};
diff --git a/drivers/net/wireless/b43/phy_ac.h b/drivers/net/wireless/b43/phy_ac.h
new file mode 100644
index 000000000000..d1ca79e0eb24
--- /dev/null
+++ b/drivers/net/wireless/b43/phy_ac.h
@@ -0,0 +1,38 @@
+#ifndef B43_PHY_AC_H_
+#define B43_PHY_AC_H_
+
+#include "phy_common.h"
+
+#define B43_PHY_AC_BBCFG                        0x001
+#define  B43_PHY_AC_BBCFG_RSTCCA                0x4000  /* Reset CCA */
+#define B43_PHY_AC_BANDCTL                      0x003   /* Band control */
+#define  B43_PHY_AC_BANDCTL_5GHZ                0x0001
+#define B43_PHY_AC_TABLE_ID                     0x00d
+#define B43_PHY_AC_TABLE_OFFSET                 0x00e
+#define B43_PHY_AC_TABLE_DATA1                  0x00f
+#define B43_PHY_AC_TABLE_DATA2                  0x010
+#define B43_PHY_AC_TABLE_DATA3                  0x011
+#define B43_PHY_AC_CLASSCTL                     0x140   /* Classifier control */
+#define  B43_PHY_AC_CLASSCTL_CCKEN              0x0001  /* CCK enable */
+#define  B43_PHY_AC_CLASSCTL_OFDMEN             0x0002  /* OFDM enable */
+#define  B43_PHY_AC_CLASSCTL_WAITEDEN           0x0004  /* Waited enable */
+#define B43_PHY_AC_BW1A                         0x371
+#define B43_PHY_AC_BW2                          0x372
+#define B43_PHY_AC_BW3                          0x373
+#define B43_PHY_AC_BW4                          0x374
+#define B43_PHY_AC_BW5                          0x375
+#define B43_PHY_AC_BW6                          0x376
+#define B43_PHY_AC_RFCTL_CMD                    0x408
+#define B43_PHY_AC_C1_CLIP                      0x6d4
+#define  B43_PHY_AC_C1_CLIP_DIS                 0x4000
+#define B43_PHY_AC_C2_CLIP                      0x8d4
+#define  B43_PHY_AC_C2_CLIP_DIS                 0x4000
+#define B43_PHY_AC_C3_CLIP                      0xad4
+#define  B43_PHY_AC_C3_CLIP_DIS                 0x4000
+
+struct b43_phy_ac {
+};
+
+extern const struct b43_phy_operations b43_phyops_ac;
+
+#endif /* B43_PHY_AC_H_ */
diff --git a/drivers/net/wireless/b43/phy_common.c b/drivers/net/wireless/b43/phy_common.c
index ee27b06074e1..ec2b9c577b90 100644
--- a/drivers/net/wireless/b43/phy_common.c
+++ b/drivers/net/wireless/b43/phy_common.c
@@ -33,6 +33,7 @@
 #include "phy_lp.h"
 #include "phy_ht.h"
 #include "phy_lcn.h"
+#include "phy_ac.h"
 #include "b43.h"
 #include "main.h"
 
@@ -70,6 +71,11 @@ int b43_phy_allocate(struct b43_wldev *dev)
                 phy->ops = &b43_phyops_lcn;
 #endif
                 break;
+        case B43_PHYTYPE_AC:
+#ifdef CONFIG_B43_PHY_AC
+                phy->ops = &b43_phyops_ac;
+#endif
+                break;
         }
         if (B43_WARN_ON(!phy->ops))
                 return -ENODEV;
@@ -572,7 +578,8 @@ void b43_phy_force_clock(struct b43_wldev *dev, bool force)
         u32 tmp;
 
         WARN_ON(dev->phy.type != B43_PHYTYPE_N &&
-                dev->phy.type != B43_PHYTYPE_HT);
+                dev->phy.type != B43_PHYTYPE_HT &&
+                dev->phy.type != B43_PHYTYPE_AC);
 
         switch (dev->dev->bus_type) {
 #ifdef CONFIG_B43_BCMA
diff --git a/drivers/net/wireless/b43/phy_common.h b/drivers/net/wireless/b43/phy_common.h
index 3912274f71e3..78d86526799e 100644
--- a/drivers/net/wireless/b43/phy_common.h
+++ b/drivers/net/wireless/b43/phy_common.h
@@ -222,6 +222,8 @@ struct b43_phy {
                 struct b43_phy_ht *ht;
                 /* LCN-PHY specific information */
                 struct b43_phy_lcn *lcn;
+                /* AC-PHY specific information */
+                struct b43_phy_ac *ac;
         };
 
         /* Band support flags. */