Re: [9front] driver for intel wireless 7260?

[kemal <kemalinanc8@gmail.com>]

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> just now i cleaned up those patches and now i have a diff that
> should work. it can be applied with `ape/patch -p0 < diff.txt`

fuck forgot one thing... openbsd sends a command for 7k family
after boot, it initializes tx backoffs to minimum. in addition,
obsd does not check for errors for this command, gonna do the
same.

the new diff is attached.

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--- /sys/src/9/pc/etheriwl.c
+++ /sys/src/9/pc/etheriwl.c
@@ -1,9 +1,10 @@
 /*
  * Intel WiFi Link driver.
  *
- * Written without any documentation but Damien Bergaminis
- * OpenBSD iwn(4) and iwm(4) driver sources. Requires intel
- * firmware to be present in /lib/firmware/iwn-* on attach.
+ * Written without any documentation but Damien Bergamini's
+ * iwn(4) and Stefan Sperling's iwm(4) OpenBSD driver sources.
+ * Requires Intel firmware to be present in /lib/firmware/iw[nm]-*
+ * on attach.
  */
 
 #include "u.h"
@@ -242,6 +243,8 @@
 
 	SbCpu1Status	= 0xa01e30,
 	SbCpu2Status	= 0xa01e34,
+	OscClk		= 0xa04068,
+		OscClkCtrl	= 1<<3,
 	UregChick	= 0xa05c00,
 		UregChickMsiEnable	= 1<<24,
 
@@ -631,6 +634,7 @@
 	Type6005	= 11,	/* also Centrino Advanced-N 6030, 6235 */
 	Type2030	= 12,
 	Type2000	= 16,
+	Type7260	= 30,
 
 	Type8265	= 35,
 };
@@ -686,6 +690,7 @@
 	[Type6005] "iwn-6005", /* see in iwlattach() below */
 	[Type2030] "iwn-2030",
 	[Type2000] "iwn-2000",
+	[Type7260] "iwm-7260-17",
 };
 
 static char *qcmd(Ctlr *ctlr, uint qid, uint code, uchar *data, int size, Block *block);
@@ -1088,6 +1093,22 @@
 		nicunlock(ctlr);
 	}
 
+	/* Enable the oscillator to count wake up time for L1 exit. (weird W/A) */
+	if(ctlr->type == Type7260){
+		if((err = niclock(ctlr)) != nil)
+			return err;
+
+		prphread(ctlr, OscClk);
+		prphread(ctlr, OscClk);
+		delay(20);
+
+		prphwrite(ctlr, OscClk, prphread(ctlr, OscClk) | OscClkCtrl);
+
+		prphread(ctlr, OscClk);
+		prphread(ctlr, OscClk);
+
+		nicunlock(ctlr);
+	}
 	if(ctlr->family < 8000){
 		if((err = niclock(ctlr)) != nil)
 			return err;
@@ -2800,6 +2821,12 @@
 	return cmd(ctlr, 210, c, 11*4);
 }
 
+static void
+tttxbackoff(Ctlr *ctlr, u32int backoff)
+{
+	cmd(ctlr, 126, (uchar*)&backoff, sizeof(backoff));
+}
+
 static char*
 updatedevicepower(Ctlr *ctlr)
 {
@@ -2864,6 +2891,10 @@
 		if((err = sendbtcoexadv(ctlr)) != nil)
 			return err;
 
+		/* Initialize tx backoffs to the minimum. */
+		if(ctlr->family == 7000)
+			tttxbackoff(ctlr, 0);
+
 		if((err = updatedevicepower(ctlr)) != nil){
 			print("can't update device power: %s\n", err);
 			return err;
@@ -3416,6 +3447,12 @@
 		iunlock(ctlr);
 		return "qcmd: broken";
 	}
+	/* wake up the nic (just needed for 7k) */
+	if(ctlr->family == 7000 && q->n == 0)
+		if(niclock(ctlr) != nil){
+			iunlock(ctlr);
+			return "qcmd: busy";
+		}
 	q->n++;
 	q->lastcmd = code;
 
@@ -4242,6 +4279,9 @@
 		if(tx != nil && tx->n > 0){
 			tx->n--;
 			wakeup(tx);
+			/* unlock 7k family nics as all commands are done */
+			if(ctlr->family == 7000 && tx->n == 0)
+				nicunlock(ctlr);
 		}
 	}
 
@@ -4349,6 +4389,11 @@
 		case 0x088e:	/* Centrino Advanced-N 6235 */
 		case 0x088f:	/* Centrino Advanced-N 6235 */
 			family = 0;
+			fwname = nil;
+			break;
+		case 0x08b1:	/* Wireless AC 7260 */
+		case 0x08b2:	/* Wireless AC 7260 */
+			family = 7000;
 			fwname = nil;
 			break;
 		case 0x24f3:	/* Wireless AC 8260 */