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Message-ID: <20070220223341.GC28895@austin.ibm.com>
Date: Tue, 20 Feb 2007 16:33:41 -0600
From: linas@...tin.ibm.com (Linas Vepstas)
To: Jeff Garzik <jeff@...zik.org>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>,
kou.ishizaki@...hiba.co.jp, arnd@...db.de,
Jens Osterkamp <jens@...ibm.com>, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH 3/12] spidernet: autoneg support for Celleb
From: Kou Ishizaki <kou.ishizaki@...hiba.co.jp>
Add auto negotiation support for Celleb.
Signed-off-by: Kou Ishizaki <kou.ishizaki@...hiba.co.jp>
Signed-off-by: Linas Vepstas <linas@...tin.ibm.com>
----
drivers/net/spider_net.c | 176 ++++++++++++++++++++++++++++++++++++++++++-----
drivers/net/spider_net.h | 10 ++
2 files changed, 170 insertions(+), 16 deletions(-)
Index: linux-2.6.20-git16/drivers/net/spider_net.h
===================================================================
--- linux-2.6.20-git16.orig/drivers/net/spider_net.h 2007-02-20 14:24:00.000000000 -0600
+++ linux-2.6.20-git16/drivers/net/spider_net.h 2007-02-20 15:02:32.000000000 -0600
@@ -50,6 +50,8 @@ extern char spider_net_driver_name[];
#define SPIDER_NET_TX_DESCRIPTORS_MAX 512
#define SPIDER_NET_TX_TIMER (HZ/5)
+#define SPIDER_NET_ANEG_TIMER (HZ)
+#define SPIDER_NET_ANEG_TIMEOUT 2
#define SPIDER_NET_RX_CSUM_DEFAULT 1
@@ -104,6 +106,7 @@ extern char spider_net_driver_name[];
#define SPIDER_NET_GMACOPEMD 0x00000100
#define SPIDER_NET_GMACLENLMT 0x00000108
+#define SPIDER_NET_GMACST 0x00000110
#define SPIDER_NET_GMACINTEN 0x00000118
#define SPIDER_NET_GMACPHYCTRL 0x00000120
@@ -333,9 +336,12 @@ enum spider_net_int2_status {
/* We rely on flagged descriptor interrupts */
#define SPIDER_NET_RXINT ( (1 << SPIDER_NET_GDAFDCINT) )
+#define SPIDER_NET_LINKINT ( 1 << SPIDER_NET_GMAC2INT )
+
#define SPIDER_NET_ERRINT ( 0xffffffff & \
(~SPIDER_NET_TXINT) & \
- (~SPIDER_NET_RXINT) )
+ (~SPIDER_NET_RXINT) & \
+ (~SPIDER_NET_LINKINT) )
#define SPIDER_NET_GPREXEC 0x80000000
#define SPIDER_NET_GPRDAT_MASK 0x0000ffff
@@ -442,6 +448,8 @@ struct spider_net_card {
struct spider_net_descr_chain rx_chain;
struct spider_net_descr *low_watermark;
+ int aneg_count;
+ struct timer_list aneg_timer;
struct timer_list tx_timer;
struct work_struct tx_timeout_task;
atomic_t tx_timeout_task_counter;
Index: linux-2.6.20-git16/drivers/net/spider_net.c
===================================================================
--- linux-2.6.20-git16.orig/drivers/net/spider_net.c 2007-02-20 14:36:13.000000000 -0600
+++ linux-2.6.20-git16/drivers/net/spider_net.c 2007-02-20 15:02:32.000000000 -0600
@@ -166,6 +166,41 @@ spider_net_read_phy(struct net_device *n
}
/**
+ * spider_net_setup_aneg - initial auto-negotiation setup
+ * @card: device structure
+ **/
+static void
+spider_net_setup_aneg(struct spider_net_card *card)
+{
+ struct mii_phy *phy = &card->phy;
+ u32 advertise = 0;
+ u16 bmcr, bmsr, stat1000, estat;
+
+ bmcr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMCR);
+ bmsr = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
+ stat1000 = spider_net_read_phy(card->netdev, phy->mii_id, MII_STAT1000);
+ estat = spider_net_read_phy(card->netdev, phy->mii_id, MII_ESTATUS);
+
+ if (bmsr & BMSR_10HALF)
+ advertise |= ADVERTISED_10baseT_Half;
+ if (bmsr & BMSR_10FULL)
+ advertise |= ADVERTISED_10baseT_Full;
+ if (bmsr & BMSR_100HALF)
+ advertise |= ADVERTISED_100baseT_Half;
+ if (bmsr & BMSR_100FULL)
+ advertise |= ADVERTISED_100baseT_Full;
+
+ if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_TFULL))
+ advertise |= SUPPORTED_1000baseT_Full;
+ if ((bmsr & BMSR_ESTATEN) && (estat & ESTATUS_1000_THALF))
+ advertise |= SUPPORTED_1000baseT_Half;
+
+ mii_phy_probe(phy, phy->mii_id);
+ phy->def->ops->setup_aneg(phy, advertise);
+
+}
+
+/**
* spider_net_rx_irq_off - switch off rx irq on this spider card
* @card: device structure
*
@@ -1248,6 +1283,33 @@ spider_net_set_mac(struct net_device *ne
}
/**
+ * spider_net_link_reset
+ * @netdev: net device structure
+ *
+ * This is called when the PHY_LINK signal is asserted. For the blade this is
+ * not connected so we should never get here.
+ *
+ */
+static void
+spider_net_link_reset(struct net_device *netdev)
+{
+
+ struct spider_net_card *card = netdev_priv(netdev);
+
+ del_timer_sync(&card->aneg_timer);
+
+ /* clear interrupt, block further interrupts */
+ spider_net_write_reg(card, SPIDER_NET_GMACST,
+ spider_net_read_reg(card, SPIDER_NET_GMACST));
+ spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
+
+ /* reset phy and setup aneg */
+ spider_net_setup_aneg(card);
+ mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
+
+}
+
+/**
* spider_net_handle_error_irq - handles errors raised by an interrupt
* @card: card structure
* @status_reg: interrupt status register 0 (GHIINT0STS)
@@ -1500,6 +1562,9 @@ spider_net_interrupt(int irq, void *ptr)
if (status_reg & SPIDER_NET_TXINT)
netif_rx_schedule(netdev);
+ if (status_reg & SPIDER_NET_LINKINT)
+ spider_net_link_reset(netdev);
+
if (status_reg & SPIDER_NET_ERRINT )
spider_net_handle_error_irq(card, status_reg);
@@ -1624,8 +1689,6 @@ spider_net_enable_card(struct spider_net
spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
SPIDER_NET_LENLMT_VALUE);
- spider_net_write_reg(card, SPIDER_NET_GMACMODE,
- SPIDER_NET_MACMODE_VALUE);
spider_net_write_reg(card, SPIDER_NET_GMACOPEMD,
SPIDER_NET_OPMODE_VALUE);
@@ -1656,6 +1719,11 @@ spider_net_open(struct net_device *netde
struct spider_net_card *card = netdev_priv(netdev);
int result;
+ /* start probing with copper */
+ spider_net_setup_aneg(card);
+ if (card->phy.def->phy_id)
+ mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
+
result = spider_net_init_chain(card, &card->tx_chain);
if (result)
goto alloc_tx_failed;
@@ -1693,17 +1761,88 @@ alloc_skbs_failed:
alloc_rx_failed:
spider_net_free_chain(card, &card->tx_chain);
alloc_tx_failed:
+ del_timer_sync(&card->aneg_timer);
return result;
}
/**
+ * spider_net_link_phy
+ * @data: used for pointer to card structure
+ *
+ */
+static void spider_net_link_phy(unsigned long data)
+{
+ struct spider_net_card *card = (struct spider_net_card *)data;
+ struct mii_phy *phy = &card->phy;
+
+ /* if link didn't come up after SPIDER_NET_ANEG_TIMEOUT tries, setup phy again */
+ if (card->aneg_count > SPIDER_NET_ANEG_TIMEOUT) {
+
+ pr_info("%s: link is down trying to bring it up\n", card->netdev->name);
+
+ switch (phy->medium) {
+ case GMII_COPPER:
+ /* enable fiber with autonegotiation first */
+ if (phy->def->ops->enable_fiber)
+ phy->def->ops->enable_fiber(phy, 1);
+ phy->medium = GMII_FIBER;
+ break;
+
+ case GMII_FIBER:
+ /* fiber didn't come up, try to disable fiber autoneg */
+ if (phy->def->ops->enable_fiber)
+ phy->def->ops->enable_fiber(phy, 0);
+ phy->medium = GMII_UNKNOWN;
+ break;
+
+ case GMII_UNKNOWN:
+ /* copper, fiber with and without failed,
+ * retry from beginning */
+ spider_net_setup_aneg(card);
+ phy->medium = GMII_COPPER;
+ break;
+ }
+
+ card->aneg_count = 0;
+ mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
+ return;
+ }
+
+ /* link still not up, try again later */
+ if (!(phy->def->ops->poll_link(phy))) {
+ card->aneg_count++;
+ mod_timer(&card->aneg_timer, jiffies + SPIDER_NET_ANEG_TIMER);
+ return;
+ }
+
+ /* link came up, get abilities */
+ phy->def->ops->read_link(phy);
+
+ spider_net_write_reg(card, SPIDER_NET_GMACST,
+ spider_net_read_reg(card, SPIDER_NET_GMACST));
+ spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0x4);
+
+ if (phy->speed == 1000)
+ spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0x00000001);
+ else
+ spider_net_write_reg(card, SPIDER_NET_GMACMODE, 0);
+
+ card->aneg_count = 0;
+
+ pr_debug("Found %s with %i Mbps, %s-duplex %sautoneg.\n",
+ phy->def->name, phy->speed, phy->duplex==1 ? "Full" : "Half",
+ phy->autoneg==1 ? "" : "no ");
+
+ return;
+}
+
+/**
* spider_net_setup_phy - setup PHY
* @card: card structure
*
* returns 0 on success, <0 on failure
*
- * spider_net_setup_phy is used as part of spider_net_probe. Sets
- * the PHY to 1000 Mbps
+ * spider_net_setup_phy is used as part of spider_net_probe.
**/
static int
spider_net_setup_phy(struct spider_net_card *card)
@@ -1714,21 +1853,21 @@ spider_net_setup_phy(struct spider_net_c
SPIDER_NET_DMASEL_VALUE);
spider_net_write_reg(card, SPIDER_NET_GPCCTRL,
SPIDER_NET_PHY_CTRL_VALUE);
- phy->mii_id = 1;
+
phy->dev = card->netdev;
phy->mdio_read = spider_net_read_phy;
phy->mdio_write = spider_net_write_phy;
- mii_phy_probe(phy, phy->mii_id);
-
- if (phy->def->ops->setup_forced)
- phy->def->ops->setup_forced(phy, SPEED_1000, DUPLEX_FULL);
-
- phy->def->ops->enable_fiber(phy);
-
- phy->def->ops->read_link(phy);
- pr_info("Found %s with %i Mbps, %s-duplex.\n", phy->def->name,
- phy->speed, phy->duplex==1 ? "Full" : "Half");
+ for (phy->mii_id = 1; phy->mii_id <= 31; phy->mii_id++) {
+ unsigned short id;
+ id = spider_net_read_phy(card->netdev, phy->mii_id, MII_BMSR);
+ if (id != 0x0000 && id != 0xffff) {
+ if (!mii_phy_probe(phy, phy->mii_id)) {
+ pr_info("Found %s.\n", phy->def->name);
+ break;
+ }
+ }
+ }
return 0;
}
@@ -1900,11 +2039,13 @@ spider_net_stop(struct net_device *netde
netif_carrier_off(netdev);
netif_stop_queue(netdev);
del_timer_sync(&card->tx_timer);
+ del_timer_sync(&card->aneg_timer);
/* disable/mask all interrupts */
spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
+ spider_net_write_reg(card, SPIDER_NET_GMACINTEN, 0);
free_irq(netdev->irq, netdev);
@@ -2043,6 +2184,11 @@ spider_net_setup_netdev(struct spider_ne
card->tx_timer.data = (unsigned long) card;
netdev->irq = card->pdev->irq;
+ card->aneg_count = 0;
+ init_timer(&card->aneg_timer);
+ card->aneg_timer.function = spider_net_link_phy;
+ card->aneg_timer.data = (unsigned long) card;
+
card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
card->tx_chain.num_desc = tx_descriptors;
-
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