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Diffstat (limited to 'drivers/net/fec_8xx/fec_mii.c')
-rw-r--r--drivers/net/fec_8xx/fec_mii.c380
1 files changed, 380 insertions, 0 deletions
diff --git a/drivers/net/fec_8xx/fec_mii.c b/drivers/net/fec_8xx/fec_mii.c
new file mode 100644
index 00000000000..803eb095cf8
--- /dev/null
+++ b/drivers/net/fec_8xx/fec_mii.c
@@ -0,0 +1,380 @@
+/*
+ * Fast Ethernet Controller (FEC) driver for Motorola MPC8xx.
+ *
+ * Copyright (c) 2003 Intracom S.A.
+ * by Pantelis Antoniou <panto@intracom.gr>
+ *
+ * Heavily based on original FEC driver by Dan Malek <dan@embeddededge.com>
+ * and modifications by Joakim Tjernlund <joakim.tjernlund@lumentis.se>
+ *
+ * Released under the GPL
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/bitops.h>
+
+#include <asm/8xx_immap.h>
+#include <asm/pgtable.h>
+#include <asm/mpc8xx.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/commproc.h>
+
+/*************************************************/
+
+#include "fec_8xx.h"
+
+/*************************************************/
+
+/* Make MII read/write commands for the FEC.
+*/
+#define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18))
+#define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff))
+#define mk_mii_end 0
+
+/*************************************************/
+
+/* XXX both FECs use the MII interface of FEC1 */
+static DEFINE_SPINLOCK(fec_mii_lock);
+
+#define FEC_MII_LOOPS 10000
+
+int fec_mii_read(struct net_device *dev, int phy_id, int location)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ fec_t *fecp;
+ int i, ret = -1;
+ unsigned long flags;
+
+ /* XXX MII interface is only connected to FEC1 */
+ fecp = &((immap_t *) IMAP_ADDR)->im_cpm.cp_fec;
+
+ spin_lock_irqsave(&fec_mii_lock, flags);
+
+ if ((FR(fecp, r_cntrl) & FEC_RCNTRL_MII_MODE) == 0) {
+ FS(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
+ FS(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
+ FW(fecp, ievent, FEC_ENET_MII);
+ }
+
+ /* Add PHY address to register command. */
+ FW(fecp, mii_speed, fep->fec_phy_speed);
+ FW(fecp, mii_data, (phy_id << 23) | mk_mii_read(location));
+
+ for (i = 0; i < FEC_MII_LOOPS; i++)
+ if ((FR(fecp, ievent) & FEC_ENET_MII) != 0)
+ break;
+
+ if (i < FEC_MII_LOOPS) {
+ FW(fecp, ievent, FEC_ENET_MII);
+ ret = FR(fecp, mii_data) & 0xffff;
+ }
+
+ spin_unlock_irqrestore(&fec_mii_lock, flags);
+
+ return ret;
+}
+
+void fec_mii_write(struct net_device *dev, int phy_id, int location, int value)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ fec_t *fecp;
+ unsigned long flags;
+ int i;
+
+ /* XXX MII interface is only connected to FEC1 */
+ fecp = &((immap_t *) IMAP_ADDR)->im_cpm.cp_fec;
+
+ spin_lock_irqsave(&fec_mii_lock, flags);
+
+ if ((FR(fecp, r_cntrl) & FEC_RCNTRL_MII_MODE) == 0) {
+ FS(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
+ FS(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
+ FW(fecp, ievent, FEC_ENET_MII);
+ }
+
+ /* Add PHY address to register command. */
+ FW(fecp, mii_speed, fep->fec_phy_speed); /* always adapt mii speed */
+ FW(fecp, mii_data, (phy_id << 23) | mk_mii_write(location, value));
+
+ for (i = 0; i < FEC_MII_LOOPS; i++)
+ if ((FR(fecp, ievent) & FEC_ENET_MII) != 0)
+ break;
+
+ if (i < FEC_MII_LOOPS)
+ FW(fecp, ievent, FEC_ENET_MII);
+
+ spin_unlock_irqrestore(&fec_mii_lock, flags);
+}
+
+/*************************************************/
+
+#ifdef CONFIG_FEC_8XX_GENERIC_PHY
+
+/*
+ * Generic PHY support.
+ * Should work for all PHYs, but link change is detected by polling
+ */
+
+static void generic_timer_callback(unsigned long data)
+{
+ struct net_device *dev = (struct net_device *)data;
+ struct fec_enet_private *fep = netdev_priv(dev);
+
+ fep->phy_timer_list.expires = jiffies + HZ / 2;
+
+ add_timer(&fep->phy_timer_list);
+
+ fec_mii_link_status_change_check(dev, 0);
+}
+
+static void generic_startup(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+
+ fep->phy_timer_list.expires = jiffies + HZ / 2; /* every 500ms */
+ fep->phy_timer_list.data = (unsigned long)dev;
+ fep->phy_timer_list.function = generic_timer_callback;
+ add_timer(&fep->phy_timer_list);
+}
+
+static void generic_shutdown(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+
+ del_timer_sync(&fep->phy_timer_list);
+}
+
+#endif
+
+#ifdef CONFIG_FEC_8XX_DM9161_PHY
+
+/* ------------------------------------------------------------------------- */
+/* The Davicom DM9161 is used on the NETTA board */
+
+/* register definitions */
+
+#define MII_DM9161_ACR 16 /* Aux. Config Register */
+#define MII_DM9161_ACSR 17 /* Aux. Config/Status Register */
+#define MII_DM9161_10TCSR 18 /* 10BaseT Config/Status Reg. */
+#define MII_DM9161_INTR 21 /* Interrupt Register */
+#define MII_DM9161_RECR 22 /* Receive Error Counter Reg. */
+#define MII_DM9161_DISCR 23 /* Disconnect Counter Register */
+
+static void dm9161_startup(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+
+ fec_mii_write(dev, fep->mii_if.phy_id, MII_DM9161_INTR, 0x0000);
+}
+
+static void dm9161_ack_int(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+
+ fec_mii_read(dev, fep->mii_if.phy_id, MII_DM9161_INTR);
+}
+
+static void dm9161_shutdown(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+
+ fec_mii_write(dev, fep->mii_if.phy_id, MII_DM9161_INTR, 0x0f00);
+}
+
+#endif
+
+/**********************************************************************************/
+
+static const struct phy_info phy_info[] = {
+#ifdef CONFIG_FEC_8XX_DM9161_PHY
+ {
+ .id = 0x00181b88,
+ .name = "DM9161",
+ .startup = dm9161_startup,
+ .ack_int = dm9161_ack_int,
+ .shutdown = dm9161_shutdown,
+ },
+#endif
+#ifdef CONFIG_FEC_8XX_GENERIC_PHY
+ {
+ .id = 0,
+ .name = "GENERIC",
+ .startup = generic_startup,
+ .shutdown = generic_shutdown,
+ },
+#endif
+};
+
+/**********************************************************************************/
+
+int fec_mii_phy_id_detect(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ const struct fec_platform_info *fpi = fep->fpi;
+ int i, r, start, end, phytype, physubtype;
+ const struct phy_info *phy;
+ int phy_hwid, phy_id;
+
+ /* if no MDIO */
+ if (fpi->use_mdio == 0)
+ return -1;
+
+ phy_hwid = -1;
+ fep->phy = NULL;
+
+ /* auto-detect? */
+ if (fpi->phy_addr == -1) {
+ start = 0;
+ end = 32;
+ } else { /* direct */
+ start = fpi->phy_addr;
+ end = start + 1;
+ }
+
+ for (phy_id = start; phy_id < end; phy_id++) {
+ r = fec_mii_read(dev, phy_id, MII_PHYSID1);
+ if (r == -1 || (phytype = (r & 0xffff)) == 0xffff)
+ continue;
+ r = fec_mii_read(dev, phy_id, MII_PHYSID2);
+ if (r == -1 || (physubtype = (r & 0xffff)) == 0xffff)
+ continue;
+ phy_hwid = (phytype << 16) | physubtype;
+ if (phy_hwid != -1)
+ break;
+ }
+
+ if (phy_hwid == -1) {
+ printk(KERN_ERR DRV_MODULE_NAME
+ ": %s No PHY detected!\n", dev->name);
+ return -1;
+ }
+
+ for (i = 0, phy = phy_info; i < sizeof(phy_info) / sizeof(phy_info[0]);
+ i++, phy++)
+ if (phy->id == (phy_hwid >> 4) || phy->id == 0)
+ break;
+
+ if (i >= sizeof(phy_info) / sizeof(phy_info[0])) {
+ printk(KERN_ERR DRV_MODULE_NAME
+ ": %s PHY id 0x%08x is not supported!\n",
+ dev->name, phy_hwid);
+ return -1;
+ }
+
+ fep->phy = phy;
+
+ printk(KERN_INFO DRV_MODULE_NAME
+ ": %s Phy @ 0x%x, type %s (0x%08x)\n",
+ dev->name, phy_id, fep->phy->name, phy_hwid);
+
+ return phy_id;
+}
+
+void fec_mii_startup(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ const struct fec_platform_info *fpi = fep->fpi;
+
+ if (!fpi->use_mdio || fep->phy == NULL)
+ return;
+
+ if (fep->phy->startup == NULL)
+ return;
+
+ (*fep->phy->startup) (dev);
+}
+
+void fec_mii_shutdown(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ const struct fec_platform_info *fpi = fep->fpi;
+
+ if (!fpi->use_mdio || fep->phy == NULL)
+ return;
+
+ if (fep->phy->shutdown == NULL)
+ return;
+
+ (*fep->phy->shutdown) (dev);
+}
+
+void fec_mii_ack_int(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ const struct fec_platform_info *fpi = fep->fpi;
+
+ if (!fpi->use_mdio || fep->phy == NULL)
+ return;
+
+ if (fep->phy->ack_int == NULL)
+ return;
+
+ (*fep->phy->ack_int) (dev);
+}
+
+/* helper function */
+static int mii_negotiated(struct mii_if_info *mii)
+{
+ int advert, lpa, val;
+
+ if (!mii_link_ok(mii))
+ return 0;
+
+ val = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_BMSR);
+ if ((val & BMSR_ANEGCOMPLETE) == 0)
+ return 0;
+
+ advert = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_ADVERTISE);
+ lpa = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_LPA);
+
+ return mii_nway_result(advert & lpa);
+}
+
+void fec_mii_link_status_change_check(struct net_device *dev, int init_media)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ unsigned int media;
+ unsigned long flags;
+
+ if (mii_check_media(&fep->mii_if, netif_msg_link(fep), init_media) == 0)
+ return;
+
+ media = mii_negotiated(&fep->mii_if);
+
+ if (netif_carrier_ok(dev)) {
+ spin_lock_irqsave(&fep->lock, flags);
+ fec_restart(dev, !!(media & ADVERTISE_FULL),
+ (media & (ADVERTISE_100FULL | ADVERTISE_100HALF)) ?
+ 100 : 10);
+ spin_unlock_irqrestore(&fep->lock, flags);
+
+ netif_start_queue(dev);
+ } else {
+ netif_stop_queue(dev);
+
+ spin_lock_irqsave(&fep->lock, flags);
+ fec_stop(dev);
+ spin_unlock_irqrestore(&fep->lock, flags);
+
+ }
+}
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