netdev - Re: [PATCH] bcm43xx: Fix code for spec changes of 2/7/2007

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Date:	Fri, 09 Feb 2007 12:11:32 -0600
From:	Larry Finger <larry.finger@...inger.net>
To:	Michael Buesch <mb@...sch.de>
CC:	John Linville <linville@...driver.com>, netdev@...r.kernel.org,
	Bcm43xx-dev@...ts.berlios.de, linux-wireless@...r.kernel.org
Subject: Re: [PATCH] bcm43xx: Fix code for spec changes of 2/7/2007

Michael,

Michael Buesch wrote:
> On Friday 09 February 2007 17:32, Larry Finger wrote:
>> The specifications for the bcm43xx driver have been modified. This patch
>> incorporates these changes in the code, which results in the BCM4311 and
>> BCM4312 working. The name of one of the PHY parameters, previously known
>> as "version", has been changed to "analog core version" .
>>
>> Signed-off-by: Larry Finger<Larry.Finger@...inger.net>
>> ---
> 
>> @@ -729,19 +729,19 @@ static void bcm43xx_phy_initb5(struct bc
>>  	struct bcm43xx_phyinfo *phy = bcm43xx_current_phy(bcm);
>>  	struct bcm43xx_radioinfo *radio = bcm43xx_current_radio(bcm);
>>  	u16 offset;
>> +	u16 value;
>> +	u8 old_channel;
>>  
>> -	if (phy->version == 1 &&
>> -	    radio->version == 0x2050) {
> 
> Why do you delete the check to radio version.
> It's still there in latest specs:
> http://bcm-v4.sipsolutions.net/802.11/PHY/Init/B5

As I have no real understanding of the differences between V3 and V4 firmware, I only follow the V3
specs at http://bcm-specs.sipsolutions.net. My usage of the V4 specs is to checking if they can
clean a point of confusion in the V3 spec. The radio version check is eliminated at the beginning of
the phy_initb5 routine in http://bcm-specs.sipsolutions.net/B5PHY. As there are radio version checks
later in the routine, I think it was meant to be removed here.

>> +	if (phy->analog == 1)
>>  		bcm43xx_radio_write16(bcm, 0x007A,
>>  				      bcm43xx_radio_read16(bcm, 0x007A)
>>  				      | 0x0050);
>> -	}
>>  	if ((bcm->board_vendor != PCI_VENDOR_ID_BROADCOM) &&
>>  	    (bcm->board_type != 0x0416)) {
>> +		value = 0x2120;
>>  		for (offset = 0x00A8 ; offset < 0x00C7; offset++) {
>> -			bcm43xx_phy_write(bcm, offset,
>> -					  (bcm43xx_phy_read(bcm, offset) + 0x2020)
>> -					  & 0x3F3F);
>> +			bcm43xx_phy_write(bcm, offset, value);
>> +			value += 0x0202;
>>  		}
> 
> I don't see how this matches specs.

See step 2 of http://bcm-specs.sipsolutions.net/B5PHY.

>>  	}
>>  	bcm43xx_phy_write(bcm, 0x0035,
>> @@ -776,7 +776,7 @@ static void bcm43xx_phy_initb5(struct bc
>>  				  bcm43xx_phy_read(bcm, BCM43xx_PHY_RADIO_BITFIELD) | (1 << 11));
>>  	}
>>  
>> -	if (phy->version == 1 && radio->version == 0x2050) {
> 
> Dito.

Ibid Step 7.

>> +	if (phy->analog == 1) {
>>  		bcm43xx_phy_write(bcm, 0x0026, 0xCE00);
>>  		bcm43xx_phy_write(bcm, 0x0021, 0x3763);
>>  		bcm43xx_phy_write(bcm, 0x0022, 0x1BC3);
>> @@ -787,14 +787,15 @@ static void bcm43xx_phy_initb5(struct bc
>>  	bcm43xx_phy_write(bcm, 0x0030, 0x00C6);
>>  	bcm43xx_write16(bcm, 0x03EC, 0x3F22);
>>  
>> -	if (phy->version == 1 && radio->version == 0x2050)
> 
> Dito.

Step 11.

>> +	if (phy->analog == 1)
>>  		bcm43xx_phy_write(bcm, 0x0020, 0x3E1C);
>>  	else
>>  		bcm43xx_phy_write(bcm, 0x0020, 0x301C);
>>  
>> -	if (phy->version == 0)
>> +	if (phy->analog == 0)
>>  		bcm43xx_write16(bcm, 0x03E4, 0x3000);
>>  
>> +	old_channel = radio->channel;
>>  	/* Force to channel 7, even if not supported. */
>>  	bcm43xx_radio_selectchannel(bcm, 7, 0);
>>  
>> @@ -816,11 +817,11 @@ static void bcm43xx_phy_initb5(struct bc
>>  
>>  	bcm43xx_radio_write16(bcm, 0x007A, bcm43xx_radio_read16(bcm, 0x007A) | 0x0007);
>>  
>> -	bcm43xx_radio_selectchannel(bcm, BCM43xx_RADIO_DEFAULT_CHANNEL_BG, 0);
>> +	bcm43xx_radio_selectchannel(bcm, old_channel, 0);
>>  
>>  	bcm43xx_phy_write(bcm, 0x0014, 0x0080);
>>  	bcm43xx_phy_write(bcm, 0x0032, 0x00CA);
>> -	bcm43xx_phy_write(bcm, 0x88A3, 0x002A);
>> +	bcm43xx_phy_write(bcm, 0x002A, 0x88A3);
> 
> Well, this seems correct, but specs are still different. From where did you get this?

Steps 14 - 26 of http://bcm-specs.sipsolutions.net/B5PHY
> 
> 
> Well, I don't review the rest until you say to which specs you did the changes. ;)

As I said earlier, everything came from http://bcm-specs.sipsolutions.net.

Larry

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