[PATCH RESEND] b43: implement baseband init for LP-PHY <= rev1

[PATCH RESEND] b43: implement baseband init for LP-PHY <= rev1

[Gábor Stefanik]

Implement baseband init for rev.0 and rev.1 LP PHYs. Convert
boardflags_hi values to defines.
Implement b43_phy_copy for easier copying between registers, as needed
by LP-PHY init.

Signed-off-by: Gábor Stefanik<netrolller.3d@gmail.com>
Cc: Michael Buesch<mb@bu3sch.de>
Cc: Larry Finger<larry.finger@lwfinger.net>
---

Hopefully this mail will survive the trip through the arcane world of Gmail's servers...

If this very-very-very-long line (including	a	few	tab	characters) doesn't get mangled, chances are that the mail didn't get mangled. More text to make this line even longer.

  b43.h        |   11 ++++++
  phy_common.c |    7 ++++
  phy_lp.c     |   95 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
  phy_lp.h     |    8 +++-
  phy_n.c      |    3 +
  5 files changed, 120 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/b43/b43.h b/drivers/net/wireless/b43/b43.h
index 4e8ad84..41ca727 100644
--- a/drivers/net/wireless/b43/b43.h
+++ b/drivers/net/wireless/b43/b43.h
@@ -142,6 +142,17 @@
  #define B43_BFL_BTCMOD			0x4000	/* BFL_BTCOEXIST is given in alternate GPIOs */
  #define B43_BFL_ALTIQ			0x8000	/* alternate I/Q settings */

+/* SPROM boardflags_hi values */
+#define B43_BFH_NOPA			0x0001	/* has no PA */
+#define B43_BFH_RSSIINV			0x0002	/* RSSI uses positive slope (not TSSI) */
+#define B43_BFH_PAREF			0x0004	/* uses the PARef LDO */
+#define B43_BFH_3TSWITCH		0x0008	/* uses a triple throw switch shared
+						 * with bluetooth */
+#define B43_BFH_PHASESHIFT		0x0010	/* can support phase shifter */
+#define B43_BFH_BUCKBOOST		0x0020	/* has buck/booster */
+#define B43_BFH_FEM_BT			0x0040	/* has FEM and switch to share antenna
+						 * with bluetooth */
+
  /* GPIO register offset, in both ChipCommon and PCI core. */
  #define B43_GPIO_CONTROL		0x6c

diff --git a/drivers/net/wireless/b43/phy_common.c b/drivers/net/wireless/b43/phy_common.c
index e176b6e..999e0bd 100644
--- a/drivers/net/wireless/b43/phy_common.c
+++ b/drivers/net/wireless/b43/phy_common.c
@@ -240,6 +240,13 @@ void b43_phy_write(struct b43_wldev *dev, u16 reg, u16 value)
  	dev->phy.ops->phy_write(dev, reg, value);
  }

+void b43_phy_copy(struct b43_wldev *dev, u16 srcreg, u16 destreg)
+{
+	assert_mac_suspended(dev);
+	dev->phy.ops->phy_write(dev, destreg,
+		dev->phy.ops->phy_read(dev, srcreg));
+}
+
  void b43_phy_mask(struct b43_wldev *dev, u16 offset, u16 mask)
  {
  	b43_phy_write(dev, offset,
diff --git a/drivers/net/wireless/b43/phy_lp.c b/drivers/net/wireless/b43/phy_lp.c
index 58e319d..dbaa2e4 100644
--- a/drivers/net/wireless/b43/phy_lp.c
+++ b/drivers/net/wireless/b43/phy_lp.c
@@ -66,7 +66,100 @@ static void lpphy_table_init(struct b43_wldev *dev)

  static void lpphy_baseband_rev0_1_init(struct b43_wldev *dev)
  {
-	B43_WARN_ON(1);//TODO rev<  2 not supported, yet.
+	struct ssb_bus *bus = dev->dev->bus;
+	struct b43_phy_lp *lpphy = dev->phy.lp;
+	u16 tmp, tmp2;
+
+	if (dev->phy.rev == 1&&
+	   (bus->sprom.boardflags_hi&  B43_BFH_FEM_BT)) {
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0xFFC0, 0x000A);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0x3F00, 0x0900);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xFFC0, 0x000A);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xC0FF, 0x0B00);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xFFC0, 0x000A);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xC0FF, 0x0400);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xFFC0, 0x000A);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xC0FF, 0x0B00);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_5, 0xFFC0, 0x000A);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_5, 0xC0FF, 0x0900);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_6, 0xFFC0, 0x000A);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_6, 0xC0FF, 0x0B00);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_7, 0xFFC0, 0x000A);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_7, 0xC0FF, 0x0900);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_8, 0xFFC0, 0x000A);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_8, 0xC0FF, 0x0B00);
+	} else if (b43_current_band(dev->wl) == IEEE80211_BAND_5GHZ ||
+		  (bus->boardinfo.type == 0x048A) || ((dev->phy.rev == 0)&&
+		  (bus->sprom.boardflags_lo&  B43_BFL_FEM))) {
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0xFFC0, 0x0001);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0xC0FF, 0x0400);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xFFC0, 0x0001);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xC0FF, 0x0500);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xFFC0, 0x0002);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xC0FF, 0x0800);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xFFC0, 0x0002);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xC0FF, 0x0A00);
+	} else if (dev->phy.rev == 1 ||
+		  (bus->sprom.boardflags_lo&  B43_BFL_FEM)) {
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0xFFC0, 0x0004);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0xC0FF, 0x0800);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xFFC0, 0x0004);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xC0FF, 0x0C00);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xFFC0, 0x0002);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xC0FF, 0x0100);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xFFC0, 0x0002);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xC0FF, 0x0300);
+	} else {
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0xFFC0, 0x000A);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0xC0FF, 0x0900);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xFFC0, 0x000A);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xC0FF, 0x0B00);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xFFC0, 0x0006);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xC0FF, 0x0500);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xFFC0, 0x0006);
+		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xC0FF, 0x0700);
+	}
+	if (dev->phy.rev == 1) {
+		b43_phy_copy(dev, B43_LPPHY_TR_LOOKUP_1, B43_LPPHY_TR_LOOKUP_5);
+		b43_phy_copy(dev, B43_LPPHY_TR_LOOKUP_2, B43_LPPHY_TR_LOOKUP_6);
+		b43_phy_copy(dev, B43_LPPHY_TR_LOOKUP_3, B43_LPPHY_TR_LOOKUP_7);
+		b43_phy_copy(dev, B43_LPPHY_TR_LOOKUP_4, B43_LPPHY_TR_LOOKUP_8);
+	}
+	if (bus->sprom.boardflags_hi&  B43_BFH_FEM_BT)&&
+	   (bus->chip_id == 0x5354)&&
+	   (bus->chip_package == SSB_CHIPPACK_BCM4712S)) {
+		b43_phy_set(dev, B43_LPPHY_CRSGAIN_CTL, 0x0006);
+		b43_phy_write(dev, B43_LPPHY_GPIO_SELECT, 0x0005);
+		b43_phy_write(dev, B43_LPPHY_GPIO_OUTEN, 0xFFFF);
+		b43_hf_write(dev, b43_hf_read | 0x0800ULL<<  32);
+	}
+	if (b43_current_band(dev->wl) == IEEE80211_BAND_2GHZ) {
+		b43_phy_set(dev, B43_LPPHY_LP_PHY_CTL, 0x8000);
+		b43_phy_set(dev, B43_LPPHY_CRSGAIN_CTL, 0x0040);
+		b43_phy_maskset(dev, B43_LPPHY_MINPWR_LEVEL, 0x00FF, 0xA400);
+		b43_phy_maskset(dev, B43_LPPHY_CRSGAIN_CTL, 0xF0FF, 0x0B00);
+		b43_phy_maskset(dev, 0x030, 0xFFF8, 0x0007);
+		b43_phy_maskset(dev, B43_LPPHY_DSSS_CONFIRM_CNT, 0xFFF8, 0x0003);
+		b43_phy_maskset(dev, B43_LPPHY_DSSS_CONFIRM_CNT, 0xFFC7, 0x0020);
+		b43_phy_mask(dev, B43_LPPHY_IDLEAFTERPKTRXTO, 0x00FF);
+	} else { /* 5GHz */
+		b43_phy_mask(dev, 0x448, 0x7FFF);
+		b43_phy_mask(dev, B43_LPPHY_CRSGAIN_CTL, 0xFFBF);
+	}
+	if (dev->phy.rev == 1) {
+		tmp = b43_read(dev, B43_LPPHY_CLIPCTRTHRESH);
+		tmp2 = (tmp&  0x03E0)>>  5
+		tmp2 |= tmp<<  5;
+		b43_phy_write(dev, 0x4C3, tmp2);
+		tmp = b43_read(dev, B43_LPPHY_OFDMSYNCTHRESH0);
+		tmp2 = (tmp&  0x1F00)>>  8
+		tmp2 |= tmp<<  5;
+		b43_phy_write(dev, 0x4C4, tmp2);
+		tmp = b43_read(dev, B43_LPPHY_VERYLOWGAINDB);
+		tmp2 = tmp&  0x00FF
+		tmp2 |= tmp<<  8;
+		b43_phy_write(dev, 0x4C5, tmp2);
+	}
  }

  static void lpphy_baseband_rev2plus_init(struct b43_wldev *dev)
diff --git a/drivers/net/wireless/b43/phy_lp.h b/drivers/net/wireless/b43/phy_lp.h
index 18370b4..d0e67e4 100644
--- a/drivers/net/wireless/b43/phy_lp.h
+++ b/drivers/net/wireless/b43/phy_lp.h
@@ -273,12 +273,16 @@
  #define B43_LPPHY_AFE_DDFS_POINTER_INIT		B43_PHY_OFDM(0xB8) /* AFE DDFS pointer init */
  #define B43_LPPHY_AFE_DDFS_INCR_INIT		B43_PHY_OFDM(0xB9) /* AFE DDFS incr init */
  #define B43_LPPHY_MRCNOISEREDUCTION		B43_PHY_OFDM(0xBA) /* mrcNoiseReduction */
-#define B43_LPPHY_TRLOOKUP3			B43_PHY_OFDM(0xBB) /* TRLookup3 */
-#define B43_LPPHY_TRLOOKUP4			B43_PHY_OFDM(0xBC) /* TRLookup4 */
+#define B43_LPPHY_TR_LOOKUP_3			B43_PHY_OFDM(0xBB) /* TR Lookup 3 */
+#define B43_LPPHY_TR_LOOKUP_4			B43_PHY_OFDM(0xBC) /* TR Lookup 4 */
  #define B43_LPPHY_RADAR_FIFO_STAT		B43_PHY_OFDM(0xBD) /* Radar FIFO Status */
  #define B43_LPPHY_GPIO_OUTEN			B43_PHY_OFDM(0xBE) /* GPIO Out enable */
  #define B43_LPPHY_GPIO_SELECT			B43_PHY_OFDM(0xBF) /* GPIO Select */
  #define B43_LPPHY_GPIO_OUT			B43_PHY_OFDM(0xC0) /* GPIO Out */
+#define B43_LPPHY_TR_LOOKUP_5			B43_PHY_OFDM(0xC7) /* TR Lookup 5 */
+#define B43_LPPHY_TR_LOOKUP_6			B43_PHY_OFDM(0xC8) /* TR Lookup 6 */
+#define B43_LPPHY_TR_LOOKUP_7			B43_PHY_OFDM(0xC9) /* TR Lookup 7 */
+#define B43_LPPHY_TR_LOOKUP_8			B43_PHY_OFDM(0xCA) /* TR Lookup 8 */



diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
index 8bcfda5..14ad95a 100644
--- a/drivers/net/wireless/b43/phy_n.c
+++ b/drivers/net/wireless/b43/phy_n.c
@@ -137,7 +137,8 @@ static void b43_radio_init2055_post(struct b43_wldev *dev)

  	b43_radio_mask(dev, B2055_MASTER1, 0xFFF3);
  	msleep(1);
-	if ((sprom->revision != 4) || !(sprom->boardflags_hi&  0x0002)) {
+	if ((sprom->revision != 4) ||
+	   !(sprom->boardflags_hi&  B43_BFH_RSSIINV)) {
  		if ((binfo->vendor != PCI_VENDOR_ID_BROADCOM) ||
  		    (binfo->type != 0x46D) ||
  		    (binfo->rev<  0x41)) {

Re: [PATCH RESEND] b43: implement baseband init for LP-PHY <= rev1

[Gábor Stefanik]

2009/8/3 Gábor Stefanik <netrolller.3d@gmail.com>:
> Implement baseband init for rev.0 and rev.1 LP PHYs. Convert
> boardflags_hi values to defines.
> Implement b43_phy_copy for easier copying between registers, as needed
> by LP-PHY init.
>
> Signed-off-by: Gábor Stefanik<netrolller.3d@gmail.com>
> Cc: Michael Buesch<mb@bu3sch.de>
> Cc: Larry Finger<larry.finger@lwfinger.net>
> ---
>

Looks like this one survived.

-- 
Vista: [V]iruses, [I]ntruders, [S]pyware, [T]rojans and [A]dware. :-)

Re: [PATCH RESEND] b43: implement baseband init for LP-PHY <= rev1

[Michael Buesch]

On Monday 03 August 2009 00:18:22 Gábor Stefanik wrote:
> Implement baseband init for rev.0 and rev.1 LP PHYs. Convert
> boardflags_hi values to defines.
> Implement b43_phy_copy for easier copying between registers, as needed
> by LP-PHY init.
> 
> Signed-off-by: Gábor Stefanik<netrolller.3d@gmail.com>
> Cc: Michael Buesch<mb@bu3sch.de>
> Cc: Larry Finger<larry.finger@lwfinger.net>
> ---
> 
> Hopefully this mail will survive the trip through the arcane world of Gmail's servers...
> 
> If this very-very-very-long line (including	a	few	tab	characters) doesn't get mangled, chances are that the mail didn't get mangled. More text to make this line even longer.
> 
>   b43.h        |   11 ++++++
>   phy_common.c |    7 ++++
>   phy_lp.c     |   95 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
>   phy_lp.h     |    8 +++-
>   phy_n.c      |    3 +
>   5 files changed, 120 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/wireless/b43/b43.h b/drivers/net/wireless/b43/b43.h
> index 4e8ad84..41ca727 100644
> --- a/drivers/net/wireless/b43/b43.h
> +++ b/drivers/net/wireless/b43/b43.h
> @@ -142,6 +142,17 @@
>   #define B43_BFL_BTCMOD			0x4000	/* BFL_BTCOEXIST is given in alternate GPIOs */
>   #define B43_BFL_ALTIQ			0x8000	/* alternate I/Q settings */
> 
> +/* SPROM boardflags_hi values */
> +#define B43_BFH_NOPA			0x0001	/* has no PA */
> +#define B43_BFH_RSSIINV			0x0002	/* RSSI uses positive slope (not TSSI) */
> +#define B43_BFH_PAREF			0x0004	/* uses the PARef LDO */
> +#define B43_BFH_3TSWITCH		0x0008	/* uses a triple throw switch shared
> +						 * with bluetooth */
> +#define B43_BFH_PHASESHIFT		0x0010	/* can support phase shifter */
> +#define B43_BFH_BUCKBOOST		0x0020	/* has buck/booster */
> +#define B43_BFH_FEM_BT			0x0040	/* has FEM and switch to share antenna
> +						 * with bluetooth */
> +
>   /* GPIO register offset, in both ChipCommon and PCI core. */
>   #define B43_GPIO_CONTROL		0x6c
> 
> diff --git a/drivers/net/wireless/b43/phy_common.c b/drivers/net/wireless/b43/phy_common.c
> index e176b6e..999e0bd 100644
> --- a/drivers/net/wireless/b43/phy_common.c
> +++ b/drivers/net/wireless/b43/phy_common.c
> @@ -240,6 +240,13 @@ void b43_phy_write(struct b43_wldev *dev, u16 reg, u16 value)
>   	dev->phy.ops->phy_write(dev, reg, value);
>   }
> 
> +void b43_phy_copy(struct b43_wldev *dev, u16 srcreg, u16 destreg)
> +{
> +	assert_mac_suspended(dev);
> +	dev->phy.ops->phy_write(dev, destreg,
> +		dev->phy.ops->phy_read(dev, srcreg));
> +}

Hm, can you reverse the srcreg/destreg order?
All C-standard copy functions use func(dest, src).
I think we should stick with it.

> +
>   void b43_phy_mask(struct b43_wldev *dev, u16 offset, u16 mask)
>   {
>   	b43_phy_write(dev, offset,
> diff --git a/drivers/net/wireless/b43/phy_lp.c b/drivers/net/wireless/b43/phy_lp.c
> index 58e319d..dbaa2e4 100644
> --- a/drivers/net/wireless/b43/phy_lp.c
> +++ b/drivers/net/wireless/b43/phy_lp.c
> @@ -66,7 +66,100 @@ static void lpphy_table_init(struct b43_wldev *dev)
> 
>   static void lpphy_baseband_rev0_1_init(struct b43_wldev *dev)
>   {
> -	B43_WARN_ON(1);//TODO rev<  2 not supported, yet.
> +	struct ssb_bus *bus = dev->dev->bus;
> +	struct b43_phy_lp *lpphy = dev->phy.lp;
> +	u16 tmp, tmp2;
> +
> +	if (dev->phy.rev == 1&&
                             ^
> +	   (bus->sprom.boardflags_hi&  B43_BFH_FEM_BT)) {
                                    ^
whitespaces


> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0xFFC0, 0x000A);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0x3F00, 0x0900);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xFFC0, 0x000A);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xC0FF, 0x0B00);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xFFC0, 0x000A);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xC0FF, 0x0400);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xFFC0, 0x000A);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xC0FF, 0x0B00);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_5, 0xFFC0, 0x000A);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_5, 0xC0FF, 0x0900);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_6, 0xFFC0, 0x000A);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_6, 0xC0FF, 0x0B00);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_7, 0xFFC0, 0x000A);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_7, 0xC0FF, 0x0900);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_8, 0xFFC0, 0x000A);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_8, 0xC0FF, 0x0B00);
> +	} else if (b43_current_band(dev->wl) == IEEE80211_BAND_5GHZ ||
> +		  (bus->boardinfo.type == 0x048A) || ((dev->phy.rev == 0)&&
                                                                         ^
whitespace

> +		  (bus->sprom.boardflags_lo&  B43_BFL_FEM))) {
                                           ^
whitespace

> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0xFFC0, 0x0001);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0xC0FF, 0x0400);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xFFC0, 0x0001);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xC0FF, 0x0500);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xFFC0, 0x0002);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xC0FF, 0x0800);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xFFC0, 0x0002);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xC0FF, 0x0A00);
> +	} else if (dev->phy.rev == 1 ||
> +		  (bus->sprom.boardflags_lo&  B43_BFL_FEM)) {
                                           ^
whitespace

> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0xFFC0, 0x0004);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0xC0FF, 0x0800);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xFFC0, 0x0004);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xC0FF, 0x0C00);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xFFC0, 0x0002);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xC0FF, 0x0100);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xFFC0, 0x0002);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xC0FF, 0x0300);
> +	} else {
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0xFFC0, 0x000A);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_1, 0xC0FF, 0x0900);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xFFC0, 0x000A);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_2, 0xC0FF, 0x0B00);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xFFC0, 0x0006);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_3, 0xC0FF, 0x0500);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xFFC0, 0x0006);
> +		b43_phy_maskset(dev, B43_LPPHY_TR_LOOKUP_4, 0xC0FF, 0x0700);
> +	}
> +	if (dev->phy.rev == 1) {
> +		b43_phy_copy(dev, B43_LPPHY_TR_LOOKUP_1, B43_LPPHY_TR_LOOKUP_5);
> +		b43_phy_copy(dev, B43_LPPHY_TR_LOOKUP_2, B43_LPPHY_TR_LOOKUP_6);
> +		b43_phy_copy(dev, B43_LPPHY_TR_LOOKUP_3, B43_LPPHY_TR_LOOKUP_7);
> +		b43_phy_copy(dev, B43_LPPHY_TR_LOOKUP_4, B43_LPPHY_TR_LOOKUP_8);

(Reverse them, if you reverse the meaning of b43_phy_copy())

> +	}
> +	if (bus->sprom.boardflags_hi&  B43_BFH_FEM_BT)&&
> +	   (bus->chip_id == 0x5354)&&

Lots of whitespace needed here...

> +	   (bus->chip_package == SSB_CHIPPACK_BCM4712S)) {
> +		b43_phy_set(dev, B43_LPPHY_CRSGAIN_CTL, 0x0006);
> +		b43_phy_write(dev, B43_LPPHY_GPIO_SELECT, 0x0005);
> +		b43_phy_write(dev, B43_LPPHY_GPIO_OUTEN, 0xFFFF);
> +		b43_hf_write(dev, b43_hf_read | 0x0800ULL<<  32);
                                            ^^           ^  ^
b43_hf_read is not called. You OR the function pointer.
And whitespace at the wrong spot.

> +	}
> +	if (b43_current_band(dev->wl) == IEEE80211_BAND_2GHZ) {
> +		b43_phy_set(dev, B43_LPPHY_LP_PHY_CTL, 0x8000);
> +		b43_phy_set(dev, B43_LPPHY_CRSGAIN_CTL, 0x0040);
> +		b43_phy_maskset(dev, B43_LPPHY_MINPWR_LEVEL, 0x00FF, 0xA400);
> +		b43_phy_maskset(dev, B43_LPPHY_CRSGAIN_CTL, 0xF0FF, 0x0B00);
> +		b43_phy_maskset(dev, 0x030, 0xFFF8, 0x0007);

Any chance to define a name for the register?
Even if it's just B43_LPPHY_030 or something like that.

> +		b43_phy_maskset(dev, B43_LPPHY_DSSS_CONFIRM_CNT, 0xFFF8, 0x0003);
> +		b43_phy_maskset(dev, B43_LPPHY_DSSS_CONFIRM_CNT, 0xFFC7, 0x0020);
> +		b43_phy_mask(dev, B43_LPPHY_IDLEAFTERPKTRXTO, 0x00FF);
> +	} else { /* 5GHz */
> +		b43_phy_mask(dev, 0x448, 0x7FFF);
> +		b43_phy_mask(dev, B43_LPPHY_CRSGAIN_CTL, 0xFFBF);
> +	}
> +	if (dev->phy.rev == 1) {
> +		tmp = b43_read(dev, B43_LPPHY_CLIPCTRTHRESH);
> +		tmp2 = (tmp&  0x03E0)>>  5
> +		tmp2 |= tmp<<  5;
> +		b43_phy_write(dev, 0x4C3, tmp2);
> +		tmp = b43_read(dev, B43_LPPHY_OFDMSYNCTHRESH0);
> +		tmp2 = (tmp&  0x1F00)>>  8
> +		tmp2 |= tmp<<  5;
> +		b43_phy_write(dev, 0x4C4, tmp2);
> +		tmp = b43_read(dev, B43_LPPHY_VERYLOWGAINDB);
> +		tmp2 = tmp&  0x00FF
> +		tmp2 |= tmp<<  8;
> +		b43_phy_write(dev, 0x4C5, tmp2);

Lots of whitespace problems in this code block.
And please define the registers. Even if you just assign numeric names (like above).
(hint: also use the B43_PHY_OFDM() macro)

> +	}
>   }
> 
>   static void lpphy_baseband_rev2plus_init(struct b43_wldev *dev)
> diff --git a/drivers/net/wireless/b43/phy_lp.h b/drivers/net/wireless/b43/phy_lp.h
> index 18370b4..d0e67e4 100644
> --- a/drivers/net/wireless/b43/phy_lp.h
> +++ b/drivers/net/wireless/b43/phy_lp.h
> @@ -273,12 +273,16 @@
>   #define B43_LPPHY_AFE_DDFS_POINTER_INIT		B43_PHY_OFDM(0xB8) /* AFE DDFS pointer init */
>   #define B43_LPPHY_AFE_DDFS_INCR_INIT		B43_PHY_OFDM(0xB9) /* AFE DDFS incr init */
>   #define B43_LPPHY_MRCNOISEREDUCTION		B43_PHY_OFDM(0xBA) /* mrcNoiseReduction */
> -#define B43_LPPHY_TRLOOKUP3			B43_PHY_OFDM(0xBB) /* TRLookup3 */
> -#define B43_LPPHY_TRLOOKUP4			B43_PHY_OFDM(0xBC) /* TRLookup4 */
> +#define B43_LPPHY_TR_LOOKUP_3			B43_PHY_OFDM(0xBB) /* TR Lookup 3 */
> +#define B43_LPPHY_TR_LOOKUP_4			B43_PHY_OFDM(0xBC) /* TR Lookup 4 */
>   #define B43_LPPHY_RADAR_FIFO_STAT		B43_PHY_OFDM(0xBD) /* Radar FIFO Status */
>   #define B43_LPPHY_GPIO_OUTEN			B43_PHY_OFDM(0xBE) /* GPIO Out enable */
>   #define B43_LPPHY_GPIO_SELECT			B43_PHY_OFDM(0xBF) /* GPIO Select */
>   #define B43_LPPHY_GPIO_OUT			B43_PHY_OFDM(0xC0) /* GPIO Out */
> +#define B43_LPPHY_TR_LOOKUP_5			B43_PHY_OFDM(0xC7) /* TR Lookup 5 */
> +#define B43_LPPHY_TR_LOOKUP_6			B43_PHY_OFDM(0xC8) /* TR Lookup 6 */
> +#define B43_LPPHY_TR_LOOKUP_7			B43_PHY_OFDM(0xC9) /* TR Lookup 7 */
> +#define B43_LPPHY_TR_LOOKUP_8			B43_PHY_OFDM(0xCA) /* TR Lookup 8 */
> 
> 
> 
> diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
> index 8bcfda5..14ad95a 100644
> --- a/drivers/net/wireless/b43/phy_n.c
> +++ b/drivers/net/wireless/b43/phy_n.c
> @@ -137,7 +137,8 @@ static void b43_radio_init2055_post(struct b43_wldev *dev)
> 
>   	b43_radio_mask(dev, B2055_MASTER1, 0xFFF3);
>   	msleep(1);
> -	if ((sprom->revision != 4) || !(sprom->boardflags_hi&  0x0002)) {
> +	if ((sprom->revision != 4) ||
> +	   !(sprom->boardflags_hi&  B43_BFH_RSSIINV)) {
                                 ^
whitespace

>   		if ((binfo->vendor != PCI_VENDOR_ID_BROADCOM) ||
>   		    (binfo->type != 0x46D) ||
>   		    (binfo->rev<  0x41)) {
> 
> 
> 
> 



-- 
Greetings, Michael.

Re: [PATCH RESEND] b43: implement baseband init for LP-PHY <= rev1

[Michael Buesch]

On Monday 03 August 2009 00:18:22 Gábor Stefanik wrote:
> Implement baseband init for rev.0 and rev.1 LP PHYs. Convert
> boardflags_hi values to defines.
> Implement b43_phy_copy for easier copying between registers, as needed
> by LP-PHY init.

> +	if (bus->sprom.boardflags_hi&  B43_BFH_FEM_BT)&&
> +	   (bus->chip_id == 0x5354)&&
> +	   (bus->chip_package == SSB_CHIPPACK_BCM4712S)) {
> +		b43_phy_set(dev, B43_LPPHY_CRSGAIN_CTL, 0x0006);
> +		b43_phy_write(dev, B43_LPPHY_GPIO_SELECT, 0x0005);
> +		b43_phy_write(dev, B43_LPPHY_GPIO_OUTEN, 0xFFFF);
> +		b43_hf_write(dev, b43_hf_read | 0x0800ULL<<  32);
> +	}

The HF write is wrong. Read the specification:
http://bcm-v4.sipsolutions.net/802.11/Mhf

Patch otherwise looks ok.
-- 
Greetings, Michael.

Re: [PATCH RESEND] b43: implement baseband init for LP-PHY <= rev1

[Michael Buesch]

On Monday 03 August 2009 11:13:37 Michael Buesch wrote:
> On Monday 03 August 2009 00:18:22 Gábor Stefanik wrote:
> > Implement baseband init for rev.0 and rev.1 LP PHYs. Convert
> > boardflags_hi values to defines.
> > Implement b43_phy_copy for easier copying between registers, as needed
> > by LP-PHY init.
> 
> > +	if (bus->sprom.boardflags_hi&  B43_BFH_FEM_BT)&&
> > +	   (bus->chip_id == 0x5354)&&
> > +	   (bus->chip_package == SSB_CHIPPACK_BCM4712S)) {
> > +		b43_phy_set(dev, B43_LPPHY_CRSGAIN_CTL, 0x0006);
> > +		b43_phy_write(dev, B43_LPPHY_GPIO_SELECT, 0x0005);
> > +		b43_phy_write(dev, B43_LPPHY_GPIO_OUTEN, 0xFFFF);
> > +		b43_hf_write(dev, b43_hf_read | 0x0800ULL<<  32);
> > +	}
> 
> The HF write is wrong. Read the specification:
> http://bcm-v4.sipsolutions.net/802.11/Mhf
> 
> Patch otherwise looks ok.

Sorry, I replied to the wrong mail. But this does also apply to V2 patch.

-- 
Greetings, Michael.

Re: [PATCH RESEND] b43: implement baseband init for LP-PHY <= rev1

[Gábor Stefanik]

On Mon, Aug 3, 2009 at 11:15 AM, Michael Buesch<mb@bu3sch.de> wrote:
> On Monday 03 August 2009 11:13:37 Michael Buesch wrote:
>> On Monday 03 August 2009 00:18:22 Gábor Stefanik wrote:
>> > Implement baseband init for rev.0 and rev.1 LP PHYs. Convert
>> > boardflags_hi values to defines.
>> > Implement b43_phy_copy for easier copying between registers, as needed
>> > by LP-PHY init.
>>
>> > +   if (bus->sprom.boardflags_hi&  B43_BFH_FEM_BT)&&
>> > +      (bus->chip_id == 0x5354)&&
>> > +      (bus->chip_package == SSB_CHIPPACK_BCM4712S)) {
>> > +           b43_phy_set(dev, B43_LPPHY_CRSGAIN_CTL, 0x0006);
>> > +           b43_phy_write(dev, B43_LPPHY_GPIO_SELECT, 0x0005);
>> > +           b43_phy_write(dev, B43_LPPHY_GPIO_OUTEN, 0xFFFF);
>> > +           b43_hf_write(dev, b43_hf_read | 0x0800ULL<<  32);
>> > +   }
>>
>> The HF write is wrong. Read the specification:
>> http://bcm-v4.sipsolutions.net/802.11/Mhf
>>
>> Patch otherwise looks ok.
>
> Sorry, I replied to the wrong mail. But this does also apply to V2 patch.
>
> --
> Greetings, Michael.
>

In V2, this line is as follows (b43_hf_read corrected):

b43_hf_write(dev, b43_hf_read(dev) | 0x0800ULL << 32)

The command in the specs is this:

mhf(2, 0x800, 0x800, 1)

2 means B43_SHM_SH_HOSTFHI, 0x800 is the bit to set, and 1 is
allbands, which, per Larry, can be ignored in our current
implementation (it is specific to the caching behavior of the mips
driver).

>From what I read in b43_hf_write, writing to HOSTFHI can be achieved
by left-shifting by 32 (16 for HOSTFMI).

Is the problem that we write all 3 hostflags registers here?

(BTW are there any other known host flags? If there are, maybe we
should #define them.)

-- 
Vista: [V]iruses, [I]ntruders, [S]pyware, [T]rojans and [A]dware. :-)

Re: [PATCH RESEND] b43: implement baseband init for LP-PHY <= rev1

[Michael Buesch]

On Monday 03 August 2009 15:55:29 Gábor Stefanik wrote:
> On Mon, Aug 3, 2009 at 11:15 AM, Michael Buesch<mb@bu3sch.de> wrote:
> > On Monday 03 August 2009 11:13:37 Michael Buesch wrote:
> >> On Monday 03 August 2009 00:18:22 Gábor Stefanik wrote:
> >> > Implement baseband init for rev.0 and rev.1 LP PHYs. Convert
> >> > boardflags_hi values to defines.
> >> > Implement b43_phy_copy for easier copying between registers, as needed
> >> > by LP-PHY init.
> >>
> >> > +   if (bus->sprom.boardflags_hi&  B43_BFH_FEM_BT)&&
> >> > +      (bus->chip_id == 0x5354)&&
> >> > +      (bus->chip_package == SSB_CHIPPACK_BCM4712S)) {
> >> > +           b43_phy_set(dev, B43_LPPHY_CRSGAIN_CTL, 0x0006);
> >> > +           b43_phy_write(dev, B43_LPPHY_GPIO_SELECT, 0x0005);
> >> > +           b43_phy_write(dev, B43_LPPHY_GPIO_OUTEN, 0xFFFF);
> >> > +           b43_hf_write(dev, b43_hf_read | 0x0800ULL<<  32);
> >> > +   }
> >>
> >> The HF write is wrong. Read the specification:
> >> http://bcm-v4.sipsolutions.net/802.11/Mhf
> >>
> >> Patch otherwise looks ok.
> >
> > Sorry, I replied to the wrong mail. But this does also apply to V2 patch.
> >
> > --
> > Greetings, Michael.
> >
> 
> In V2, this line is as follows (b43_hf_read corrected):
> 
> b43_hf_write(dev, b43_hf_read(dev) | 0x0800ULL << 32)
> 
> The command in the specs is this:
> 
> mhf(2, 0x800, 0x800, 1)
> 
> 2 means B43_SHM_SH_HOSTFHI, 0x800 is the bit to set, and 1 is
> allbands, which, per Larry, can be ignored in our current
> implementation (it is specific to the caching behavior of the mips
> driver).
> 
> From what I read in b43_hf_write, writing to HOSTFHI can be achieved
> by left-shifting by 32 (16 for HOSTFMI).
> 
> Is the problem that we write all 3 hostflags registers here?
> 
> (BTW are there any other known host flags? If there are, maybe we
> should #define them.)
> 

My point is that update_mhf does not write to actual hardware, as far
as I understand the code. Larry, can you please explain that part of the
specs?

-- 
Greetings, Michael.

Re: [PATCH RESEND] b43: implement baseband init for LP-PHY <= rev1

[Gábor Stefanik]

2009/8/3 Michael Buesch <mb@bu3sch.de>:
> On Monday 03 August 2009 15:55:29 Gábor Stefanik wrote:
>> On Mon, Aug 3, 2009 at 11:15 AM, Michael Buesch<mb@bu3sch.de> wrote:
>> > On Monday 03 August 2009 11:13:37 Michael Buesch wrote:
>> >> On Monday 03 August 2009 00:18:22 Gábor Stefanik wrote:
>> >> > Implement baseband init for rev.0 and rev.1 LP PHYs. Convert
>> >> > boardflags_hi values to defines.
>> >> > Implement b43_phy_copy for easier copying between registers, as needed
>> >> > by LP-PHY init.
>> >>
>> >> > +   if (bus->sprom.boardflags_hi&  B43_BFH_FEM_BT)&&
>> >> > +      (bus->chip_id == 0x5354)&&
>> >> > +      (bus->chip_package == SSB_CHIPPACK_BCM4712S)) {
>> >> > +           b43_phy_set(dev, B43_LPPHY_CRSGAIN_CTL, 0x0006);
>> >> > +           b43_phy_write(dev, B43_LPPHY_GPIO_SELECT, 0x0005);
>> >> > +           b43_phy_write(dev, B43_LPPHY_GPIO_OUTEN, 0xFFFF);
>> >> > +           b43_hf_write(dev, b43_hf_read | 0x0800ULL<<  32);
>> >> > +   }
>> >>
>> >> The HF write is wrong. Read the specification:
>> >> http://bcm-v4.sipsolutions.net/802.11/Mhf
>> >>
>> >> Patch otherwise looks ok.
>> >
>> > Sorry, I replied to the wrong mail. But this does also apply to V2 patch.
>> >
>> > --
>> > Greetings, Michael.
>> >
>>
>> In V2, this line is as follows (b43_hf_read corrected):
>>
>> b43_hf_write(dev, b43_hf_read(dev) | 0x0800ULL << 32)
>>
>> The command in the specs is this:
>>
>> mhf(2, 0x800, 0x800, 1)
>>
>> 2 means B43_SHM_SH_HOSTFHI, 0x800 is the bit to set, and 1 is
>> allbands, which, per Larry, can be ignored in our current
>> implementation (it is specific to the caching behavior of the mips
>> driver).
>>
>> From what I read in b43_hf_write, writing to HOSTFHI can be achieved
>> by left-shifting by 32 (16 for HOSTFMI).
>>
>> Is the problem that we write all 3 hostflags registers here?
>>
>> (BTW are there any other known host flags? If there are, maybe we
>> should #define them.)
>>
>
> My point is that update_mhf does not write to actual hardware, as far
> as I understand the code. Larry, can you please explain that part of the
> specs?
>

>From 802.11/Mhf:
"If core->clk is not zero AND band->mhfs[idx] is not equal to tmp:
   1. Write band->mhfs[idx] to Shared Memory Address addr[idx]"

This looks to me like it does indeed write to SHM, though the actual
mhf() tries to avoid writing to SHM if possible, while b43_hf_write
doesn't perform this optimization. (We don't have a band->mhfs, nor a
bandstate[] array.)

-- 
Vista: [V]iruses, [I]ntruders, [S]pyware, [T]rojans and [A]dware. :-)

Re: [PATCH RESEND] b43: implement baseband init for LP-PHY <= rev1

[Larry Finger]

Gábor Stefanik wrote:
> 2009/8/3 Michael Buesch <mb@bu3sch.de>:
>> On Monday 03 August 2009 15:55:29 Gábor Stefanik wrote:
>>> On Mon, Aug 3, 2009 at 11:15 AM, Michael Buesch<mb@bu3sch.de> wrote:
>>>> On Monday 03 August 2009 11:13:37 Michael Buesch wrote:
>>>>> On Monday 03 August 2009 00:18:22 Gábor Stefanik wrote:
>>>>>> Implement baseband init for rev.0 and rev.1 LP PHYs. Convert
>>>>>> boardflags_hi values to defines.
>>>>>> Implement b43_phy_copy for easier copying between registers, as needed
>>>>>> by LP-PHY init.
>>>>>> +   if (bus->sprom.boardflags_hi&  B43_BFH_FEM_BT)&&
>>>>>> +      (bus->chip_id == 0x5354)&&
>>>>>> +      (bus->chip_package == SSB_CHIPPACK_BCM4712S)) {
>>>>>> +           b43_phy_set(dev, B43_LPPHY_CRSGAIN_CTL, 0x0006);
>>>>>> +           b43_phy_write(dev, B43_LPPHY_GPIO_SELECT, 0x0005);
>>>>>> +           b43_phy_write(dev, B43_LPPHY_GPIO_OUTEN, 0xFFFF);
>>>>>> +           b43_hf_write(dev, b43_hf_read | 0x0800ULL<<  32);
>>>>>> +   }
>>>>> The HF write is wrong. Read the specification:
>>>>> http://bcm-v4.sipsolutions.net/802.11/Mhf
>>>>>
>>>>> Patch otherwise looks ok.
>>>> Sorry, I replied to the wrong mail. But this does also apply to V2 patch.
>>>>
>>>> --
>>>> Greetings, Michael.
>>>>
>>> In V2, this line is as follows (b43_hf_read corrected):
>>>
>>> b43_hf_write(dev, b43_hf_read(dev) | 0x0800ULL << 32)
>>>
>>> The command in the specs is this:
>>>
>>> mhf(2, 0x800, 0x800, 1)
>>>
>>> 2 means B43_SHM_SH_HOSTFHI, 0x800 is the bit to set, and 1 is
>>> allbands, which, per Larry, can be ignored in our current
>>> implementation (it is specific to the caching behavior of the mips
>>> driver).
>>>
>>> From what I read in b43_hf_write, writing to HOSTFHI can be achieved
>>> by left-shifting by 32 (16 for HOSTFMI).
>>>
>>> Is the problem that we write all 3 hostflags registers here?
>>>
>>> (BTW are there any other known host flags? If there are, maybe we
>>> should #define them.)
>>>
>> My point is that update_mhf does not write to actual hardware, as far
>> as I understand the code. Larry, can you please explain that part of the
>> specs?
>>
> 
>>From 802.11/Mhf:
> "If core->clk is not zero AND band->mhfs[idx] is not equal to tmp:
>    1. Write band->mhfs[idx] to Shared Memory Address addr[idx]"
> 
> This looks to me like it does indeed write to SHM, though the actual
> mhf() tries to avoid writing to SHM if possible, while b43_hf_write
> doesn't perform this optimization. (We don't have a band->mhfs, nor a
> bandstate[] array.)

Gábor states it the way the Broadcom routine is written. They have the
flags divided into 3 16-bit values - high, middle, and low. The values
are kept in arrays - one set is for the current band and the other is
for both bands. When the routine is entered, the appropriate quantity
is saved in a temporary, then the array value is maskset. Only when
the resulting value changes is the shared memory location updated. The
implication is that shared memory writes are expensive. Is that true?

Larry

Re: [PATCH RESEND] b43: implement baseband init for LP-PHY <= rev1

[Michael Buesch]

On Monday 03 August 2009 22:58:30 Larry Finger wrote:
> Gábor states it the way the Broadcom routine is written. They have the
> flags divided into 3 16-bit values - high, middle, and low. The values
> are kept in arrays - one set is for the current band and the other is
> for both bands. When the routine is entered, the appropriate quantity
> is saved in a temporary, then the array value is maskset. Only when
> the resulting value changes is the shared memory location updated. The
> implication is that shared memory writes are expensive. Is that true?

No. I think it has other reasons.

-- 
Greetings, Michael.

Re: [PATCH RESEND] b43: implement baseband init for LP-PHY <= rev1

[Gábor Stefanik]

On Mon, Aug 3, 2009 at 11:16 PM, Michael Buesch<mb@bu3sch.de> wrote:
> On Monday 03 August 2009 22:58:30 Larry Finger wrote:
>> Gábor states it the way the Broadcom routine is written. They have the
>> flags divided into 3 16-bit values - high, middle, and low. The values
>> are kept in arrays - one set is for the current band and the other is
>> for both bands. When the routine is entered, the appropriate quantity
>> is saved in a temporary, then the array value is maskset. Only when
>> the resulting value changes is the shared memory location updated. The
>> implication is that shared memory writes are expensive. Is that true?
>
> No. I think it has other reasons.
>
> --
> Greetings, Michael.
>

In that case, is the code correct:

-- 
Vista: [V]iruses, [I]ntruders, [S]pyware, [T]rojans and [A]dware. :-)