[PATCH] b44: add wol for old nic

This patch adds wol support for the older 440x nics that use pattern matching.
This patch is a redo thanks to feedback from Michael Chan and Francois Romieu.

Signed-off-by: Gary Zambrano  <zambrano@broadcom.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/net/b44.c b/drivers/net/b44.c
index 12fc67a..98c0675 100644 (file)
--- a/drivers/net/b44.c
+++ b/drivers/net/b44.c
@@ -75,6 +75,15 @@
 /* minimum number of free TX descriptors required to wake up TX process */
 #define B44_TX_WAKEUP_THRESH           (B44_TX_RING_SIZE / 4)
 
+/* b44 internal pattern match filter info */
+#define B44_PATTERN_BASE       0x400
+#define B44_PATTERN_SIZE       0x80
+#define B44_PMASK_BASE         0x600
+#define B44_PMASK_SIZE         0x10
+#define B44_MAX_PATTERNS       16
+#define B44_ETHIPV6UDP_HLEN    62
+#define B44_ETHIPV4UDP_HLEN    42
+
 static char version[] __devinitdata =
        DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n";
 
@@ -1457,6 +1466,103 @@ static void b44_poll_controller(struct net_device *dev)
 }
 #endif
 
+static void bwfilter_table(struct b44 *bp, u8 *pp, u32 bytes, u32 table_offset)
+{
+       u32 i;
+       u32 *pattern = (u32 *) pp;
+
+       for (i = 0; i < bytes; i += sizeof(u32)) {
+               bw32(bp, B44_FILT_ADDR, table_offset + i);
+               bw32(bp, B44_FILT_DATA, pattern[i / sizeof(u32)]);
+       }
+}
+
+static int b44_magic_pattern(u8 *macaddr, u8 *ppattern, u8 *pmask, int offset)
+{
+       int magicsync = 6;
+       int k, j, len = offset;
+       int ethaddr_bytes = ETH_ALEN;
+
+       memset(ppattern + offset, 0xff, magicsync);
+       for (j = 0; j < magicsync; j++)
+               set_bit(len++, (unsigned long *) pmask);
+
+       for (j = 0; j < B44_MAX_PATTERNS; j++) {
+               if ((B44_PATTERN_SIZE - len) >= ETH_ALEN)
+                       ethaddr_bytes = ETH_ALEN;
+               else
+                       ethaddr_bytes = B44_PATTERN_SIZE - len;
+               if (ethaddr_bytes <=0)
+                       break;
+               for (k = 0; k< ethaddr_bytes; k++) {
+                       ppattern[offset + magicsync +
+                               (j * ETH_ALEN) + k] = macaddr[k];
+                       len++;
+                       set_bit(len, (unsigned long *) pmask);
+               }
+       }
+       return len - 1;
+}
+
+/* Setup magic packet patterns in the b44 WOL
+ * pattern matching filter.
+ */
+static void b44_setup_pseudo_magicp(struct b44 *bp)
+{
+
+       u32 val;
+       int plen0, plen1, plen2;
+       u8 *pwol_pattern;
+       u8 pwol_mask[B44_PMASK_SIZE];
+
+       pwol_pattern = kmalloc(B44_PATTERN_SIZE, GFP_KERNEL);
+       if (!pwol_pattern) {
+               printk(KERN_ERR PFX "Memory not available for WOL\n");
+               return;
+       }
+
+       /* Ipv4 magic packet pattern - pattern 0.*/
+       memset(pwol_pattern, 0, B44_PATTERN_SIZE);
+       memset(pwol_mask, 0, B44_PMASK_SIZE);
+       plen0 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
+                                 B44_ETHIPV4UDP_HLEN);
+
+       bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE, B44_PATTERN_BASE);
+       bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE, B44_PMASK_BASE);
+
+       /* Raw ethernet II magic packet pattern - pattern 1 */
+       memset(pwol_pattern, 0, B44_PATTERN_SIZE);
+       memset(pwol_mask, 0, B44_PMASK_SIZE);
+       plen1 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
+                                 ETH_HLEN);
+
+       bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
+                      B44_PATTERN_BASE + B44_PATTERN_SIZE);
+       bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
+                      B44_PMASK_BASE + B44_PMASK_SIZE);
+
+       /* Ipv6 magic packet pattern - pattern 2 */
+       memset(pwol_pattern, 0, B44_PATTERN_SIZE);
+       memset(pwol_mask, 0, B44_PMASK_SIZE);
+       plen2 = b44_magic_pattern(bp->dev->dev_addr, pwol_pattern, pwol_mask,
+                                 B44_ETHIPV6UDP_HLEN);
+
+       bwfilter_table(bp, pwol_pattern, B44_PATTERN_SIZE,
+                      B44_PATTERN_BASE + B44_PATTERN_SIZE + B44_PATTERN_SIZE);
+       bwfilter_table(bp, pwol_mask, B44_PMASK_SIZE,
+                      B44_PMASK_BASE + B44_PMASK_SIZE + B44_PMASK_SIZE);
+
+       kfree(pwol_pattern);
+
+       /* set these pattern's lengths: one less than each real length */
+       val = plen0 | (plen1 << 8) | (plen2 << 16) | WKUP_LEN_ENABLE_THREE;
+       bw32(bp, B44_WKUP_LEN, val);
+
+       /* enable wakeup pattern matching */
+       val = br32(bp, B44_DEVCTRL);
+       bw32(bp, B44_DEVCTRL, val | DEVCTRL_PFE);
+
+}
 
 static void b44_setup_wol(struct b44 *bp)
 {
@@ -1482,7 +1588,9 @@ static void b44_setup_wol(struct b44 *bp)
                val = br32(bp, B44_DEVCTRL);
                bw32(bp, B44_DEVCTRL, val | DEVCTRL_MPM | DEVCTRL_PFE);
 
-       }
+       } else {
+               b44_setup_pseudo_magicp(bp);
+       }
 
        val = br32(bp, B44_SBTMSLOW);
        bw32(bp, B44_SBTMSLOW, val | SBTMSLOW_PE);

diff --git a/drivers/net/b44.h b/drivers/net/b44.h
index 1f47777..4944507 100644 (file)
--- a/drivers/net/b44.h
+++ b/drivers/net/b44.h
@@ -24,6 +24,9 @@
 #define  WKUP_LEN_P3_MASK      0x7f000000 /* Pattern 3 */
 #define  WKUP_LEN_P3_SHIFT     24
 #define  WKUP_LEN_D3           0x80000000
+#define  WKUP_LEN_DISABLE      0x80808080
+#define  WKUP_LEN_ENABLE_TWO   0x80800000
+#define  WKUP_LEN_ENABLE_THREE 0x80000000
 #define B44_ISTAT      0x0020UL /* Interrupt Status */
 #define  ISTAT_LS              0x00000020 /* Link Change (B0 only) */
 #define  ISTAT_PME             0x00000040 /* Power Management Event */