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|
/*
* Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
*
* Copyright (c) 2003 Intracom S.A.
* by Pantelis Antoniou <panto@intracom.gr>
*
* 2005 (c) MontaVista Software, Inc.
* Vitaly Bordug <vbordug@ru.mvista.com>
*
* Heavily based on original FEC driver by Dan Malek <dan@embeddededge.com>
* and modifications by Joakim Tjernlund <joakim.tjernlund@lumentis.se>
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#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/pgtable.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include "fs_enet.h"
/*************************************************/
/*
* 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 fs_enet_private *fep = netdev_priv(dev);
fep->phy_timer_list.expires = jiffies + HZ / 2;
add_timer(&fep->phy_timer_list);
fs_mii_link_status_change_check(dev, 0);
}
static void generic_startup(struct net_device *dev)
{
struct fs_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 fs_enet_private *fep = netdev_priv(dev);
del_timer_sync(&fep->phy_timer_list);
}
/* ------------------------------------------------------------------------- */
/* The Davicom DM9161 is used on the NETTA board */
/* register definitions */
#define MII_DM9161_ANAR 4 /* Aux. Config Register */
#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 fs_enet_private *fep = netdev_priv(dev);
fs_mii_write(dev, fep->mii_if.phy_id, MII_DM9161_INTR, 0x0000);
/* Start autonegotiation */
fs_mii_write(dev, fep->mii_if.phy_id, MII_BMCR, 0x1200);
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(HZ*8);
}
static void dm9161_ack_int(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
fs_mii_read(dev, fep->mii_if.phy_id, MII_DM9161_INTR);
}
static void dm9161_shutdown(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
fs_mii_write(dev, fep->mii_if.phy_id, MII_DM9161_INTR, 0x0f00);
}
/**********************************************************************************/
static const struct phy_info phy_info[] = {
{
.id = 0x00181b88,
.name = "DM9161",
.startup = dm9161_startup,
.ack_int = dm9161_ack_int,
.shutdown = dm9161_shutdown,
}, {
.id = 0,
.name = "GENERIC",
.startup = generic_startup,
.shutdown = generic_shutdown,
},
};
/**********************************************************************************/
static int phy_id_detect(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
const struct fs_platform_info *fpi = fep->fpi;
struct fs_enet_mii_bus *bus = fep->mii_bus;
int i, r, start, end, phytype, physubtype;
const struct phy_info *phy;
int phy_hwid, phy_id;
phy_hwid = -1;
fep->phy = NULL;
/* auto-detect? */
if (fpi->phy_addr == -1) {
start = 1;
end = 32;
} else { /* direct */
start = fpi->phy_addr;
end = start + 1;
}
for (phy_id = start; phy_id < end; phy_id++) {
/* skip already used phy addresses on this bus */
if (bus->usage_map & (1 << phy_id))
continue;
r = fs_mii_read(dev, phy_id, MII_PHYSID1);
if (r == -1 || (phytype = (r & 0xffff)) == 0xffff)
continue;
r = fs_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! range=0x%02x-0x%02x\n",
dev->name, start, end);
return -1;
}
for (i = 0, phy = phy_info; i < ARRAY_SIZE(phy_info); i++, phy++)
if (phy->id == (phy_hwid >> 4) || phy->id == 0)
break;
if (i >= ARRAY_SIZE(phy_info)) {
printk(KERN_ERR DRV_MODULE_NAME
": %s PHY id 0x%08x is not supported!\n",
dev->name, phy_hwid);
return -1;
}
fep->phy = phy;
/* mark this address as used */
bus->usage_map |= (1 << phy_id);
printk(KERN_INFO DRV_MODULE_NAME
": %s Phy @ 0x%x, type %s (0x%08x)%s\n",
dev->name, phy_id, fep->phy->name, phy_hwid,
fpi->phy_addr == -1 ? " (auto-detected)" : "");
return phy_id;
}
void fs_mii_startup(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
if (fep->phy->startup)
(*fep->phy->startup) (dev);
}
void fs_mii_shutdown(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
if (fep->phy->shutdown)
(*fep->phy->shutdown) (dev);
}
void fs_mii_ack_int(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
if (fep->phy->ack_int)
(*fep->phy->ack_int) (dev);
}
#define MII_LINK 0x0001
#define MII_HALF 0x0002
#define MII_FULL 0x0004
#define MII_BASE4 0x0008
#define MII_10M 0x0010
#define MII_100M 0x0020
#define MII_1G 0x0040
#define MII_10G 0x0080
/* return full mii info at one gulp, with a usable form */
static unsigned int mii_full_status(struct mii_if_info *mii)
{
unsigned int status;
int bmsr, adv, lpa, neg;
struct fs_enet_private* fep = netdev_priv(mii->dev);
/* first, a dummy read, needed to latch some MII phys */
(void)mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR);
bmsr = mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR);
/* no link */
if ((
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