b43: Split PHY alloc and init

This splits the PHY allocation from the PHY init.
This is needed in order to properly support Analog handling.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/main.c

@@ -1091,8 +1091,12 @@ void b43_wireless_core_reset(struct b43_wldev *dev, u32 flags)
 	ssb_read32(dev->dev, SSB_TMSLOW);	/* flush */
 	msleep(1);
 
-	/* Turn Analog ON */
-	b43_switch_analog(dev, 1);
+	/* Turn Analog ON, but only if we already know the PHY-type.
+	 * This protects against very early setup where we don't know the
+	 * PHY-type, yet. wireless_core_reset will be called once again later,
+	 * when we know the PHY-type. */
+	if (dev->phy.ops)
+		b43_switch_analog(dev, 1);
 
 	macctl = b43_read32(dev, B43_MMIO_MACCTL);
 	macctl &= ~B43_MACCTL_GMODE;
@@ -2694,6 +2698,7 @@ static void b43_mgmtframe_txantenna(struct b43_wldev *dev, int antenna)
 /* This is the opposite of b43_chip_init() */
 static void b43_chip_exit(struct b43_wldev *dev)
 {
+	b43_phy_exit(dev);
 	b43_gpio_cleanup(dev);
 	/* firmware is released later */
 }
@@ -3952,7 +3957,6 @@ static void b43_wireless_core_exit(struct b43_wldev *dev)
 		dev_kfree_skb_any(dev->wl->current_beacon);
 		dev->wl->current_beacon = NULL;
 	}
-	b43_phy_exit(dev);
 
 	ssb_device_disable(dev->dev, 0);
 	ssb_bus_may_powerdown(dev->dev->bus);
@@ -3979,24 +3983,23 @@ static int b43_wireless_core_init(struct b43_wldev *dev)
 		b43_wireless_core_reset(dev, tmp);
 	}
 
+	/* Reset all data structures. */
 	setup_struct_wldev_for_init(dev);
-	err = b43_phy_operations_setup(dev);
-	if (err)
-		goto err_busdown;
+	phy->ops->prepare_structs(dev);
 
 	/* Enable IRQ routing to this device. */
 	ssb_pcicore_dev_irqvecs_enable(&bus->pcicore, dev->dev);
 
 	b43_imcfglo_timeouts_workaround(dev);
 	b43_bluetooth_coext_disable(dev);
-	if (phy->ops->prepare) {
-		err = phy->ops->prepare(dev);
+	if (phy->ops->prepare_hardware) {
+		err = phy->ops->prepare_hardware(dev);
 		if (err)
-			goto err_phy_exit;
+			goto err_busdown;
 	}
 	err = b43_chip_init(dev);
 	if (err)
-		goto err_phy_exit;
+		goto err_busdown;
 	b43_shm_write16(dev, B43_SHM_SHARED,
 			B43_SHM_SH_WLCOREREV, dev->dev->id.revision);
 	hf = b43_hf_read(dev);
@@ -4064,8 +4067,6 @@ static int b43_wireless_core_init(struct b43_wldev *dev)
 
 err_chip_exit:
 	b43_chip_exit(dev);
-err_phy_exit:
-	b43_phy_exit(dev);
 err_busdown:
 	ssb_bus_may_powerdown(bus);
 	B43_WARN_ON(b43_status(dev) != B43_STAT_UNINIT);
@@ -4342,6 +4343,7 @@ static void b43_wireless_core_detach(struct b43_wldev *dev)
 	/* We release firmware that late to not be required to re-request
 	 * is all the time when we reinit the core. */
 	b43_release_firmware(dev);
+	b43_phy_free(dev);
 }
 
 static int b43_wireless_core_attach(struct b43_wldev *dev)
@@ -4415,16 +4417,20 @@ static int b43_wireless_core_attach(struct b43_wldev *dev)
 		}
 	}
 
+	err = b43_phy_allocate(dev);
+	if (err)
+		goto err_powerdown;
+
 	dev->phy.gmode = have_2ghz_phy;
 	tmp = dev->phy.gmode ? B43_TMSLOW_GMODE : 0;
 	b43_wireless_core_reset(dev, tmp);
 
 	err = b43_validate_chipaccess(dev);
 	if (err)
-		goto err_powerdown;
+		goto err_phy_free;
 	err = b43_setup_bands(dev, have_2ghz_phy, have_5ghz_phy);
 	if (err)
-		goto err_powerdown;
+		goto err_phy_free;
 
 	/* Now set some default "current_dev" */
 	if (!wl->current_dev)
@@ -4438,6 +4444,8 @@ static int b43_wireless_core_attach(struct b43_wldev *dev)
 out:
 	return err;
 
+err_phy_free:
+	b43_phy_free(dev);
 err_powerdown:
 	ssb_bus_may_powerdown(bus);
 	return err;

drivers/net/wireless/b43/phy_a.c

@@ -391,8 +391,6 @@ static int b43_aphy_op_allocate(struct b43_wldev *dev)
 		return -ENOMEM;
 	dev->phy.a = aphy;
 
-	//TODO init struct b43_phy_a
-
 	err = b43_aphy_init_tssi2dbm_table(dev);
 	if (err)
 		goto err_free_aphy;
@@ -406,30 +404,47 @@ static int b43_aphy_op_allocate(struct b43_wldev *dev)
 	return err;
 }
 
-static int b43_aphy_op_init(struct b43_wldev *dev)
+static void b43_aphy_op_prepare_structs(struct b43_wldev *dev)
 {
-	struct b43_phy_a *aphy = dev->phy.a;
+	struct b43_phy *phy = &dev->phy;
+	struct b43_phy_a *aphy = phy->a;
+	const void *tssi2dbm;
+	int tgt_idle_tssi;
 
-	b43_phy_inita(dev);
-	aphy->initialised = 1;
+	/* tssi2dbm table is constant, so it is initialized at alloc time.
+	 * Save a copy of the pointer. */
+	tssi2dbm = aphy->tssi2dbm;
+	tgt_idle_tssi = aphy->tgt_idle_tssi;
+
+	/* Zero out the whole PHY structure. */
+	memset(aphy, 0, sizeof(*aphy));
+
+	aphy->tssi2dbm = tssi2dbm;
+	aphy->tgt_idle_tssi = tgt_idle_tssi;
+
+	//TODO init struct b43_phy_a
 
-	return 0;
 }
 
-static void b43_aphy_op_exit(struct b43_wldev *dev)
+static void b43_aphy_op_free(struct b43_wldev *dev)
 {
-	struct b43_phy_a *aphy = dev->phy.a;
+	struct b43_phy *phy = &dev->phy;
+	struct b43_phy_a *aphy = phy->a;
 
-	if (aphy->initialised) {
-		//TODO
-		aphy->initialised = 0;
-	}
-	//TODO
 	kfree(aphy->tssi2dbm);
+	aphy->tssi2dbm = NULL;
+
 	kfree(aphy);
 	dev->phy.a = NULL;
 }
 
+static int b43_aphy_op_init(struct b43_wldev *dev)
+{
+	b43_phy_inita(dev);
+
+	return 0;
+}
+
 static inline u16 adjust_phyreg(struct b43_wldev *dev, u16 offset)
 {
 	/* OFDM registers are base-registers for the A-PHY. */
@@ -608,8 +623,9 @@ static void b43_aphy_op_pwork_60sec(struct b43_wldev *dev)
 
 const struct b43_phy_operations b43_phyops_a = {
 	.allocate		= b43_aphy_op_allocate,
+	.free			= b43_aphy_op_free,
+	.prepare_structs	= b43_aphy_op_prepare_structs,
 	.init			= b43_aphy_op_init,
-	.exit			= b43_aphy_op_exit,
 	.phy_read		= b43_aphy_op_read,
 	.phy_write		= b43_aphy_op_write,
 	.radio_read		= b43_aphy_op_radio_read,

drivers/net/wireless/b43/phy_a.h

@@ -103,8 +103,6 @@ void b43_ofdmtab_write32(struct b43_wldev *dev, u16 table,
 
 
 struct b43_phy_a {
-	bool initialised;
-
 	/* Pointer to the table used to convert a
 	 * TSSI value to dBm-Q5.2 */
 	const s8 *tssi2dbm;

drivers/net/wireless/b43/phy_common.c

@@ -35,7 +35,7 @@
 #include "main.h"
 
 
-int b43_phy_operations_setup(struct b43_wldev *dev)
+int b43_phy_allocate(struct b43_wldev *dev)
 {
 	struct b43_phy *phy = &(dev->phy);
 	int err;
@@ -70,6 +70,12 @@ int b43_phy_operations_setup(struct b43_wldev *dev)
 	return err;
 }
 
+void b43_phy_free(struct b43_wldev *dev)
+{
+	dev->phy.ops->free(dev);
+	dev->phy.ops = NULL;
+}
+
 int b43_phy_init(struct b43_wldev *dev)
 {
 	struct b43_phy *phy = &dev->phy;

drivers/net/wireless/b43/phy_common.h

@@ -74,11 +74,21 @@ enum b43_txpwr_result {
 /**
  * struct b43_phy_operations - Function pointers for PHY ops.
  *
- * @prepare:		Prepare the PHY. This is called before @init.
+ * @allocate:		Allocate and initialise the PHY data structures.
+ * 			Must not be NULL.
+ * @free:		Destroy and free the PHY data structures.
+ * 			Must not be NULL.
+ *
+ * @prepare_structs:	Prepare the PHY data structures.
+ * 			The data structures allocated in @allocate are
+ * 			initialized here.
+ * 			Must not be NULL.
+ * @prepare_hardware:	Prepare the PHY. This is called before b43_chip_init to
+ * 			do some early early PHY hardware init.
  * 			Can be NULL, if not required.
  * @init:		Initialize the PHY.
  * 			Must not be NULL.
- * @exit:		Shutdown the PHY and free all data structures.
+ * @exit:		Shutdown the PHY.
  * 			Can be NULL, if not required.
  *
  * @phy_read:		Read from a PHY register.
@@ -133,7 +143,9 @@ enum b43_txpwr_result {
 struct b43_phy_operations {
 	/* Initialisation */
 	int (*allocate)(struct b43_wldev *dev);
-	int (*prepare)(struct b43_wldev *dev);
+	void (*free)(struct b43_wldev *dev);
+	void (*prepare_structs)(struct b43_wldev *dev);
+	int (*prepare_hardware)(struct b43_wldev *dev);
 	int (*init)(struct b43_wldev *dev);
 	void (*exit)(struct b43_wldev *dev);
 
@@ -237,10 +249,15 @@ struct b43_phy {
 
 
 /**
- * b43_phy_operations_setup - Initialize the PHY operations datastructure
- * based on the current PHY type.
+ * b43_phy_allocate - Allocate PHY structs
+ * Allocate the PHY data structures, based on the current dev->phy.type
+ */
+int b43_phy_allocate(struct b43_wldev *dev);
+
+/**
+ * b43_phy_free - Free PHY structs
  */
-int b43_phy_operations_setup(struct b43_wldev *dev);
+void b43_phy_free(struct b43_wldev *dev);
 
 /**
  * b43_phy_init - Initialise the PHY

drivers/net/wireless/b43/phy_g.c

@@ -2635,7 +2635,7 @@ static int b43_gphy_op_allocate(struct b43_wldev *dev)
 {
 	struct b43_phy_g *gphy;
 	struct b43_txpower_lo_control *lo;
-	int err, i;
+	int err;
 
 	gphy = kzalloc(sizeof(*gphy), GFP_KERNEL);
 	if (!gphy) {
@@ -2644,6 +2644,51 @@ static int b43_gphy_op_allocate(struct b43_wldev *dev)
 	}
 	dev->phy.g = gphy;
 
+	lo = kzalloc(sizeof(*lo), GFP_KERNEL);
+	if (!lo) {
+		err = -ENOMEM;
+		goto err_free_gphy;
+	}
+	gphy->lo_control = lo;
+
+	err = b43_gphy_init_tssi2dbm_table(dev);
+	if (err)
+		goto err_free_lo;
+
+	return 0;
+
+err_free_lo:
+	kfree(lo);
+err_free_gphy:
+	kfree(gphy);
+error:
+	return err;
+}
+
+static void b43_gphy_op_prepare_structs(struct b43_wldev *dev)
+{
+	struct b43_phy *phy = &dev->phy;
+	struct b43_phy_g *gphy = phy->g;
+	const void *tssi2dbm;
+	int tgt_idle_tssi;
+	struct b43_txpower_lo_control *lo;
+	unsigned int i;
+
+	/* tssi2dbm table is constant, so it is initialized at alloc time.
+	 * Save a copy of the pointer. */
+	tssi2dbm = gphy->tssi2dbm;
+	tgt_idle_tssi = gphy->tgt_idle_tssi;
+	/* Save the LO pointer. */
+	lo = gphy->lo_control;
+
+	/* Zero out the whole PHY structure. */
+	memset(gphy, 0, sizeof(*gphy));
+
+	/* Restore pointers. */
+	gphy->tssi2dbm = tssi2dbm;
+	gphy->tgt_idle_tssi = tgt_idle_tssi;
+	gphy->lo_control = lo;
+
 	memset(gphy->minlowsig, 0xFF, sizeof(gphy->minlowsig));
 
 	/* NRSSI */
@@ -2662,31 +2707,28 @@ static int b43_gphy_op_allocate(struct b43_wldev *dev)
 
 	gphy->average_tssi = 0xFF;
 
-	lo = kzalloc(sizeof(*lo), GFP_KERNEL);
-	if (!lo) {
-		err = -ENOMEM;
-		goto err_free_gphy;
-	}
-	gphy->lo_control = lo;
-
+	/* Local Osciallator structure */
 	lo->tx_bias = 0xFF;
 	INIT_LIST_HEAD(&lo->calib_list);
+}
 
-	err = b43_gphy_init_tssi2dbm_table(dev);
-	if (err)
-		goto err_free_lo;
+static void b43_gphy_op_free(struct b43_wldev *dev)
+{
+	struct b43_phy *phy = &dev->phy;
+	struct b43_phy_g *gphy = phy->g;
 
-	return 0;
+	kfree(gphy->lo_control);
+
+	if (gphy->dyn_tssi_tbl)
+		kfree(gphy->tssi2dbm);
+	gphy->dyn_tssi_tbl = 0;
+	gphy->tssi2dbm = NULL;
 
-err_free_lo:
-	kfree(lo);
-err_free_gphy:
 	kfree(gphy);
-error:
-	return err;
+	dev->phy.g = NULL;
 }
 
-static int b43_gphy_op_prepare(struct b43_wldev *dev)
+static int b43_gphy_op_prepare_hardware(struct b43_wldev *dev)
 {
 	struct b43_phy *phy = &dev->phy;
 	struct b43_phy_g *gphy = phy->g;
@@ -2718,28 +2760,14 @@ static int b43_gphy_op_prepare(struct b43_wldev *dev)
 
 static int b43_gphy_op_init(struct b43_wldev *dev)
 {
-	struct b43_phy_g *gphy = dev->phy.g;
-
 	b43_phy_initg(dev);
-	gphy->initialised = 1;
 
 	return 0;
 }
 
 static void b43_gphy_op_exit(struct b43_wldev *dev)
 {
-	struct b43_phy_g *gphy = dev->phy.g;
-
-	if (gphy->initialised) {
-		//TODO
-		gphy->initialised = 0;
-	}
 	b43_lo_g_cleanup(dev);
-	kfree(gphy->lo_control);
-	if (gphy->dyn_tssi_tbl)
-		kfree(gphy->tssi2dbm);
-	kfree(gphy);
-	dev->phy.g = NULL;
 }
 
 static u16 b43_gphy_op_read(struct b43_wldev *dev, u16 reg)
@@ -3232,7 +3260,9 @@ static void b43_gphy_op_pwork_60sec(struct b43_wldev *dev)
 
 const struct b43_phy_operations b43_phyops_g = {
 	.allocate		= b43_gphy_op_allocate,
-	.prepare		= b43_gphy_op_prepare,
+	.free			= b43_gphy_op_free,
+	.prepare_structs	= b43_gphy_op_prepare_structs,
+	.prepare_hardware	= b43_gphy_op_prepare_hardware,
 	.init			= b43_gphy_op_init,
 	.exit			= b43_gphy_op_exit,
 	.phy_read		= b43_gphy_op_read,

drivers/net/wireless/b43/phy_g.h

@@ -114,8 +114,6 @@ static inline bool b43_compare_bbatt(const struct b43_bbatt *a,
 struct b43_txpower_lo_control;
 
 struct b43_phy_g {
-	bool initialised;
-
 	/* ACI (adjacent channel interference) flags. */
 	bool aci_enable;
 	bool aci_wlan_automatic;

drivers/net/wireless/b43/phy_lp.c

@@ -36,34 +36,34 @@ static int b43_lpphy_op_allocate(struct b43_wldev *dev)
 		return -ENOMEM;
 	dev->phy.lp = lpphy;
 
-	//TODO
-
 	return 0;
 }
 
-static int b43_lpphy_op_init(struct b43_wldev *dev)
+static void b43_lpphy_op_prepare_structs(struct b43_wldev *dev)
 {
-	struct b43_phy_lp *lpphy = dev->phy.lp;
+	struct b43_phy *phy = &dev->phy;
+	struct b43_phy_lp *lpphy = phy->lp;
 
-	//TODO
-	lpphy->initialised = 1;
+	memset(lpphy, 0, sizeof(*lpphy));
 
-	return 0;
+	//TODO
 }
 
-static void b43_lpphy_op_exit(struct b43_wldev *dev)
+static void b43_lpphy_op_free(struct b43_wldev *dev)
 {
 	struct b43_phy_lp *lpphy = dev->phy.lp;
 
-	if (lpphy->initialised) {
-		//TODO
-		lpphy->initialised = 0;
-	}
-
 	kfree(lpphy);
 	dev->phy.lp = NULL;
 }
 
+static int b43_lpphy_op_init(struct b43_wldev *dev)
+{
+	//TODO
+
+	return 0;
+}
+
 static u16 b43_lpphy_op_read(struct b43_wldev *dev, u16 reg)
 {
 	b43_write16(dev, B43_MMIO_PHY_CONTROL, reg);
@@ -138,8 +138,9 @@ static enum b43_txpwr_result b43_lpphy_op_recalc_txpower(struct b43_wldev *dev,
 
 const struct b43_phy_operations b43_phyops_lp = {
 	.allocate		= b43_lpphy_op_allocate,
+	.free			= b43_lpphy_op_free,
+	.prepare_structs	= b43_lpphy_op_prepare_structs,
 	.init			= b43_lpphy_op_init,
-	.exit			= b43_lpphy_op_exit,
 	.phy_read		= b43_lpphy_op_read,
 	.phy_write		= b43_lpphy_op_write,
 	.radio_read		= b43_lpphy_op_radio_read,

drivers/net/wireless/b43/phy_lp.h

@@ -530,7 +530,7 @@
 
 
 struct b43_phy_lp {
-	bool initialised;
+	//TODO
 };
 
 

drivers/net/wireless/b43/phy_n.c

@@ -499,35 +499,31 @@ static int b43_nphy_op_allocate(struct b43_wldev *dev)
 		return -ENOMEM;
 	dev->phy.n = nphy;
 
-	//TODO init struct b43_phy_n
-
 	return 0;
 }
 
-static int b43_nphy_op_init(struct b43_wldev *dev)
+static void b43_nphy_op_prepare_structs(struct b43_wldev *dev)
 {
-	struct b43_phy_n *nphy = dev->phy.n;
-	int err;
+	struct b43_phy *phy = &dev->phy;
+	struct b43_phy_n *nphy = phy->n;
 
-	err = b43_phy_initn(dev);
-	if (err)
-		return err;
-	nphy->initialised = 1;
+	memset(nphy, 0, sizeof(*nphy));
 
-	return 0;
+	//TODO init struct b43_phy_n
 }
 
-static void b43_nphy_op_exit(struct b43_wldev *dev)
+static void b43_nphy_op_free(struct b43_wldev *dev)
 {
-	struct b43_phy_n *nphy = dev->phy.n;
+	struct b43_phy *phy = &dev->phy;
+	struct b43_phy_n *nphy = phy->n;
 
-	if (nphy->initialised) {
-		//TODO
-		nphy->initialised = 0;
-	}
-	//TODO
 	kfree(nphy);
-	dev->phy.n = NULL;
+	phy->n = NULL;
+}
+
+static int b43_nphy_op_init(struct b43_wldev *dev)
+{
+	return b43_phy_initn(dev);
 }
 
 static inline void check_phyreg(struct b43_wldev *dev, u16 offset)
@@ -610,8 +606,9 @@ static unsigned int b43_nphy_op_get_default_chan(struct b43_wldev *dev)
 
 const struct b43_phy_operations b43_phyops_n = {
 	.allocate		= b43_nphy_op_allocate,
+	.free			= b43_nphy_op_free,
+	.prepare_structs	= b43_nphy_op_prepare_structs,
 	.init			= b43_nphy_op_init,
-	.exit			= b43_nphy_op_exit,
 	.phy_read		= b43_nphy_op_read,
 	.phy_write		= b43_nphy_op_write,
 	.radio_read		= b43_nphy_op_radio_read,

drivers/net/wireless/b43/phy_n.h

@@ -920,8 +920,6 @@
 struct b43_wldev;
 
 struct b43_phy_n {
-	bool initialised;
-
 	//TODO lots of missing stuff
 };