[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
--- 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 @@
}
#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 @@
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
--- 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 */