Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-23 19:31:53 +00:00
Code Issues Packages Projects Releases Wiki Activity
c3b8542307
linux/drivers/net/au1000_eth.c
Patrick McHardy 5b54814022 net: use symbolic values for ndo_start_xmit() return codes 
Convert magic values 1 and -1 to NETDEV_TX_BUSY and NETDEV_TX_LOCKED respectively.

0 (NETDEV_TX_OK) is not changed to keep the noise down, except in very few cases
where its in direct proximity to one of the other values.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-06-13 01:18:50 -07:00

1306 lines
33 KiB
C
Raw Blame History

/*
*
* Alchemy Au1x00 ethernet driver
*
* Copyright 2001-2003, 2006 MontaVista Software Inc.
* Copyright 2002 TimeSys Corp.
* Added ethtool/mii-tool support,
* Copyright 2004 Matt Porter <mporter@kernel.crashing.org>
* Update: 2004 Bjoern Riemer, riemer@fokus.fraunhofer.de
* or riemer@riemer-nt.de: fixed the link beat detection with
* ioctls (SIOCGMIIPHY)
* Copyright 2006 Herbert Valerio Riedel <hvr@gnu.org>
* converted to use linux-2.6.x's PHY framework
*
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or source@mvista.com
*
* ########################################################################
*
* This program is free software; you can distribute it and/or modify it
* under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* ########################################################################
*
*
*/
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/errno.h>
#include <linux/in.h>
#include <linux/ioport.h>
#include <linux/bitops.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/crc32.h>
#include <linux/phy.h>
#include <asm/cpu.h>
#include <asm/mipsregs.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/processor.h>
#include <au1000.h>
#include <prom.h>
#include "au1000_eth.h"
#ifdef AU1000_ETH_DEBUG
static int au1000_debug = 5;
#else
static int au1000_debug = 3;
#endif
#define DRV_NAME "au1000_eth"
#define DRV_VERSION "1.6"
#define DRV_AUTHOR "Pete Popov <ppopov@embeddedalley.com>"
#define DRV_DESC "Au1xxx on-chip Ethernet driver"
MODULE_AUTHOR(DRV_AUTHOR);
MODULE_DESCRIPTION(DRV_DESC);
MODULE_LICENSE("GPL");
/*
* Theory of operation
*
* The Au1000 MACs use a simple rx and tx descriptor ring scheme.
* There are four receive and four transmit descriptors. These
* descriptors are not in memory; rather, they are just a set of
* hardware registers.
*
* Since the Au1000 has a coherent data cache, the receive and
* transmit buffers are allocated from the KSEG0 segment. The
* hardware registers, however, are still mapped at KSEG1 to
* make sure there's no out-of-order writes, and that all writes
* complete immediately.
*/
/* These addresses are only used if yamon doesn't tell us what
* the mac address is, and the mac address is not passed on the
* command line.
*/
static unsigned char au1000_mac_addr[6] __devinitdata = {
0x00, 0x50, 0xc2, 0x0c, 0x30, 0x00
};
struct au1000_private *au_macs[NUM_ETH_INTERFACES];
/*
* board-specific configurations
*
* PHY detection algorithm
*
* If AU1XXX_PHY_STATIC_CONFIG is undefined, the PHY setup is
* autodetected:
*
* mii_probe() first searches the current MAC's MII bus for a PHY,
* selecting the first (or last, if AU1XXX_PHY_SEARCH_HIGHEST_ADDR is
* defined) PHY address not already claimed by another netdev.
*
* If nothing was found that way when searching for the 2nd ethernet
* controller's PHY and AU1XXX_PHY1_SEARCH_ON_MAC0 is defined, then
* the first MII bus is searched as well for an unclaimed PHY; this is
* needed in case of a dual-PHY accessible only through the MAC0's MII
* bus.
*
* Finally, if no PHY is found, then the corresponding ethernet
* controller is not registered to the network subsystem.
*/
/* autodetection defaults */
#undef AU1XXX_PHY_SEARCH_HIGHEST_ADDR
#define AU1XXX_PHY1_SEARCH_ON_MAC0
/* static PHY setup
*
* most boards PHY setup should be detectable properly with the
* autodetection algorithm in mii_probe(), but in some cases (e.g. if
* you have a switch attached, or want to use the PHY's interrupt
* notification capabilities) you can provide a static PHY
* configuration here
*
* IRQs may only be set, if a PHY address was configured
* If a PHY address is given, also a bus id is required to be set
*
* ps: make sure the used irqs are configured properly in the board
* specific irq-map
*/
#if defined(CONFIG_MIPS_BOSPORUS)
/*
* Micrel/Kendin 5 port switch attached to MAC0,
* MAC0 is associated with PHY address 5 (== WAN port)
* MAC1 is not associated with any PHY, since it's connected directly
* to the switch.
* no interrupts are used
*/
# define AU1XXX_PHY_STATIC_CONFIG
# define AU1XXX_PHY0_ADDR 5
# define AU1XXX_PHY0_BUSID 0
# undef AU1XXX_PHY0_IRQ
# undef AU1XXX_PHY1_ADDR
# undef AU1XXX_PHY1_BUSID
# undef AU1XXX_PHY1_IRQ
#endif
#if defined(AU1XXX_PHY0_BUSID) && (AU1XXX_PHY0_BUSID > 0)
# error MAC0-associated PHY attached 2nd MACs MII bus not supported yet
#endif
static void enable_mac(struct net_device *dev, int force_reset)
{
unsigned long flags;
struct au1000_private *aup = netdev_priv(dev);
spin_lock_irqsave(&aup->lock, flags);
if(force_reset || (!aup->mac_enabled)) {
*aup->enable = MAC_EN_CLOCK_ENABLE;
au_sync_delay(2);
*aup->enable = (MAC_EN_RESET0 | MAC_EN_RESET1 | MAC_EN_RESET2
| MAC_EN_CLOCK_ENABLE);
au_sync_delay(2);
aup->mac_enabled = 1;
}
spin_unlock_irqrestore(&aup->lock, flags);
}
/*
* MII operations
*/
static int au1000_mdio_read(struct net_device *dev, int phy_addr, int reg)
{
struct au1000_private *aup = netdev_priv(dev);
volatile u32 *const mii_control_reg = &aup->mac->mii_control;
volatile u32 *const mii_data_reg = &aup->mac->mii_data;
u32 timedout = 20;
u32 mii_control;
while (*mii_control_reg & MAC_MII_BUSY) {
mdelay(1);
if (--timedout == 0) {
printk(KERN_ERR "%s: read_MII busy timeout!!\n",
dev->name);
return -1;
}
}
mii_control = MAC_SET_MII_SELECT_REG(reg) |
MAC_SET_MII_SELECT_PHY(phy_addr) | MAC_MII_READ;
*mii_control_reg = mii_control;
timedout = 20;
while (*mii_control_reg & MAC_MII_BUSY) {
mdelay(1);
if (--timedout == 0) {
printk(KERN_ERR "%s: mdio_read busy timeout!!\n",
dev->name);
return -1;
}
}
return (int)*mii_data_reg;
}
static void au1000_mdio_write(struct net_device *dev, int phy_addr,
int reg, u16 value)
{
struct au1000_private *aup = netdev_priv(dev);
volatile u32 *const mii_control_reg = &aup->mac->mii_control;
volatile u32 *const mii_data_reg = &aup->mac->mii_data;
u32 timedout = 20;
u32 mii_control;
while (*mii_control_reg & MAC_MII_BUSY) {
mdelay(1);
if (--timedout == 0) {
printk(KERN_ERR "%s: mdio_write busy timeout!!\n",
dev->name);
return;
}
}
mii_control = MAC_SET_MII_SELECT_REG(reg) |
MAC_SET_MII_SELECT_PHY(phy_addr) | MAC_MII_WRITE;
*mii_data_reg = value;
*mii_control_reg = mii_control;
}
static int au1000_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
{
/* WARNING: bus->phy_map[phy_addr].attached_dev == dev does
* _NOT_ hold (e.g. when PHY is accessed through other MAC's MII bus) */
struct net_device *const dev = bus->priv;
enable_mac(dev, 0); /* make sure the MAC associated with this
* mii_bus is enabled */
return au1000_mdio_read(dev, phy_addr, regnum);
}
static int au1000_mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum,
u16 value)
{
struct net_device *const dev = bus->priv;
enable_mac(dev, 0); /* make sure the MAC associated with this
* mii_bus is enabled */
au1000_mdio_write(dev, phy_addr, regnum, value);
return 0;
}
static int au1000_mdiobus_reset(struct mii_bus *bus)
{
struct net_device *const dev = bus->priv;
enable_mac(dev, 0); /* make sure the MAC associated with this
* mii_bus is enabled */
return 0;
}
static void hard_stop(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
if (au1000_debug > 4)
printk(KERN_INFO "%s: hard stop\n", dev->name);
aup->mac->control &= ~(MAC_RX_ENABLE | MAC_TX_ENABLE);
au_sync_delay(10);
}
static void enable_rx_tx(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
if (au1000_debug > 4)
printk(KERN_INFO "%s: enable_rx_tx\n", dev->name);
aup->mac->control |= (MAC_RX_ENABLE | MAC_TX_ENABLE);
au_sync_delay(10);
}
static void
au1000_adjust_link(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
struct phy_device *phydev = aup->phy_dev;
unsigned long flags;
int status_change = 0;
BUG_ON(!aup->phy_dev);
spin_lock_irqsave(&aup->lock, flags);
if (phydev->link && (aup->old_speed != phydev->speed)) {
// speed changed
switch(phydev->speed) {
case SPEED_10:
case SPEED_100:
break;
default:
printk(KERN_WARNING
"%s: Speed (%d) is not 10/100 ???\n",
dev->name, phydev->speed);
break;
}
aup->old_speed = phydev->speed;
status_change = 1;
}
if (phydev->link && (aup->old_duplex != phydev->duplex)) {
// duplex mode changed
/* switching duplex mode requires to disable rx and tx! */
hard_stop(dev);
if (DUPLEX_FULL == phydev->duplex)
aup->mac->control = ((aup->mac->control
| MAC_FULL_DUPLEX)
& ~MAC_DISABLE_RX_OWN);
else
aup->mac->control = ((aup->mac->control
& ~MAC_FULL_DUPLEX)
| MAC_DISABLE_RX_OWN);
au_sync_delay(1);
enable_rx_tx(dev);
aup->old_duplex = phydev->duplex;
status_change = 1;
}
if(phydev->link != aup->old_link) {
// link state changed
if (!phydev->link) {
/* link went down */
aup->old_speed = 0;
aup->old_duplex = -1;
}
aup->old_link = phydev->link;
status_change = 1;
}
spin_unlock_irqrestore(&aup->lock, flags);
if (status_change) {
if (phydev->link)
printk(KERN_INFO "%s: link up (%d/%s)\n",
dev->name, phydev->speed,
DUPLEX_FULL == phydev->duplex ? "Full" : "Half");
else
printk(KERN_INFO "%s: link down\n", dev->name);
}
}
static int mii_probe (struct net_device *dev)
{
struct au1000_private *const aup = netdev_priv(dev);
struct phy_device *phydev = NULL;
#if defined(AU1XXX_PHY_STATIC_CONFIG)
BUG_ON(aup->mac_id < 0 || aup->mac_id > 1);
if(aup->mac_id == 0) { /* get PHY0 */
# if defined(AU1XXX_PHY0_ADDR)
phydev = au_macs[AU1XXX_PHY0_BUSID]->mii_bus->phy_map[AU1XXX_PHY0_ADDR];
# else
printk (KERN_INFO DRV_NAME ":%s: using PHY-less setup\n",
dev->name);
return 0;
# endif /* defined(AU1XXX_PHY0_ADDR) */
} else if (aup->mac_id == 1) { /* get PHY1 */
# if defined(AU1XXX_PHY1_ADDR)
phydev = au_macs[AU1XXX_PHY1_BUSID]->mii_bus->phy_map[AU1XXX_PHY1_ADDR];
# else
printk (KERN_INFO DRV_NAME ":%s: using PHY-less setup\n",
dev->name);
return 0;
# endif /* defined(AU1XXX_PHY1_ADDR) */
}
#else /* defined(AU1XXX_PHY_STATIC_CONFIG) */
int phy_addr;
/* find the first (lowest address) PHY on the current MAC's MII bus */
for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++)
if (aup->mii_bus->phy_map[phy_addr]) {
phydev = aup->mii_bus->phy_map[phy_addr];
# if !defined(AU1XXX_PHY_SEARCH_HIGHEST_ADDR)
break; /* break out with first one found */
# endif
}
# if defined(AU1XXX_PHY1_SEARCH_ON_MAC0)
/* try harder to find a PHY */
if (!phydev && (aup->mac_id == 1)) {
/* no PHY found, maybe we have a dual PHY? */
printk (KERN_INFO DRV_NAME ": no PHY found on MAC1, "
"let's see if it's attached to MAC0...\n");
BUG_ON(!au_macs[0]);
/* find the first (lowest address) non-attached PHY on
* the MAC0 MII bus */
for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
struct phy_device *const tmp_phydev =
au_macs[0]->mii_bus->phy_map[phy_addr];
if (!tmp_phydev)
continue; /* no PHY here... */
if (tmp_phydev->attached_dev)
continue; /* already claimed by MAC0 */
phydev = tmp_phydev;
break; /* found it */
}
}
# endif /* defined(AU1XXX_PHY1_SEARCH_OTHER_BUS) */
#endif /* defined(AU1XXX_PHY_STATIC_CONFIG) */
if (!phydev) {
printk (KERN_ERR DRV_NAME ":%s: no PHY found\n", dev->name);
return -1;
}
/* now we are supposed to have a proper phydev, to attach to... */
BUG_ON(phydev->attached_dev);
phydev = phy_connect(dev, dev_name(&phydev->dev), &au1000_adjust_link,
0, PHY_INTERFACE_MODE_MII);
if (IS_ERR(phydev)) {
printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
return PTR_ERR(phydev);
}
/* mask with MAC supported features */
phydev->supported &= (SUPPORTED_10baseT_Half
| SUPPORTED_10baseT_Full
| SUPPORTED_100baseT_Half
| SUPPORTED_100baseT_Full
| SUPPORTED_Autoneg
/* | SUPPORTED_Pause | SUPPORTED_Asym_Pause */
| SUPPORTED_MII
| SUPPORTED_TP);
phydev->advertising = phydev->supported;
aup->old_link = 0;
aup->old_speed = 0;
aup->old_duplex = -1;
aup->phy_dev = phydev;
printk(KERN_INFO "%s: attached PHY driver [%s] "
"(mii_bus:phy_addr=%s, irq=%d)\n", dev->name,
phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
return 0;
}
/*
* Buffer allocation/deallocation routines. The buffer descriptor returned
* has the virtual and dma address of a buffer suitable for
* both, receive and transmit operations.
*/
static db_dest_t *GetFreeDB(struct au1000_private *aup)
{
db_dest_t *pDB;
pDB = aup->pDBfree;
if (pDB) {
aup->pDBfree = pDB->pnext;
}
return pDB;
}
void ReleaseDB(struct au1000_private *aup, db_dest_t *pDB)
{
db_dest_t *pDBfree = aup->pDBfree;
if (pDBfree)
pDBfree->pnext = pDB;
aup->pDBfree = pDB;
}
static void reset_mac_unlocked(struct net_device *dev)
{
struct au1000_private *const aup = netdev_priv(dev);
int i;
hard_stop(dev);
*aup->enable = MAC_EN_CLOCK_ENABLE;
au_sync_delay(2);
*aup->enable = 0;
au_sync_delay(2);
aup->tx_full = 0;
for (i = 0; i < NUM_RX_DMA; i++) {
/* reset control bits */
aup->rx_dma_ring[i]->buff_stat &= ~0xf;
}
for (i = 0; i < NUM_TX_DMA; i++) {
/* reset control bits */
aup->tx_dma_ring[i]->buff_stat &= ~0xf;
}
aup->mac_enabled = 0;
}
static void reset_mac(struct net_device *dev)
{
struct au1000_private *const aup = netdev_priv(dev);
unsigned long flags;
if (au1000_debug > 4)
printk(KERN_INFO "%s: reset mac, aup %x\n",
dev->name, (unsigned)aup);
spin_lock_irqsave(&aup->lock, flags);
reset_mac_unlocked (dev);
spin_unlock_irqrestore(&aup->lock, flags);
}
/*
* Setup the receive and transmit "rings". These pointers are the addresses
* of the rx and tx MAC DMA registers so they are fixed by the hardware --
* these are not descriptors sitting in memory.
*/
static void
setup_hw_rings(struct au1000_private *aup, u32 rx_base, u32 tx_base)
{
int i;
for (i = 0; i < NUM_RX_DMA; i++) {
aup->rx_dma_ring[i] =
(volatile rx_dma_t *) (rx_base + sizeof(rx_dma_t)*i);
}
for (i = 0; i < NUM_TX_DMA; i++) {
aup->tx_dma_ring[i] =
(volatile tx_dma_t *) (tx_base + sizeof(tx_dma_t)*i);
}
}
static struct {
u32 base_addr;
u32 macen_addr;
int irq;
struct net_device *dev;
} iflist[2] = {
#ifdef CONFIG_SOC_AU1000
{AU1000_ETH0_BASE, AU1000_MAC0_ENABLE, AU1000_MAC0_DMA_INT},
{AU1000_ETH1_BASE, AU1000_MAC1_ENABLE, AU1000_MAC1_DMA_INT}
#endif
#ifdef CONFIG_SOC_AU1100
{AU1100_ETH0_BASE, AU1100_MAC0_ENABLE, AU1100_MAC0_DMA_INT}
#endif
#ifdef CONFIG_SOC_AU1500
{AU1500_ETH0_BASE, AU1500_MAC0_ENABLE, AU1500_MAC0_DMA_INT},
{AU1500_ETH1_BASE, AU1500_MAC1_ENABLE, AU1500_MAC1_DMA_INT}
#endif
#ifdef CONFIG_SOC_AU1550
{AU1550_ETH0_BASE, AU1550_MAC0_ENABLE, AU1550_MAC0_DMA_INT},
{AU1550_ETH1_BASE, AU1550_MAC1_ENABLE, AU1550_MAC1_DMA_INT}
#endif
};
static int num_ifs;
/*
* ethtool operations
*/
static int au1000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct au1000_private *aup = netdev_priv(dev);
if (aup->phy_dev)
return phy_ethtool_gset(aup->phy_dev, cmd);
return -EINVAL;
}
static int au1000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct au1000_private *aup = netdev_priv(dev);
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (aup->phy_dev)
return phy_ethtool_sset(aup->phy_dev, cmd);
return -EINVAL;
}
static void
au1000_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
struct au1000_private *aup = netdev_priv(dev);
strcpy(info->driver, DRV_NAME);
strcpy(info->version, DRV_VERSION);
info->fw_version[0] = '\0';
sprintf(info->bus_info, "%s %d", DRV_NAME, aup->mac_id);
info->regdump_len = 0;
}
static const struct ethtool_ops au1000_ethtool_ops = {
.get_settings = au1000_get_settings,
.set_settings = au1000_set_settings,
.get_drvinfo = au1000_get_drvinfo,
.get_link = ethtool_op_get_link,
};
/*
* Initialize the interface.
*
* When the device powers up, the clocks are disabled and the
* mac is in reset state. When the interface is closed, we
* do the same -- reset the device and disable the clocks to
* conserve power. Thus, whenever au1000_init() is called,
* the device should already be in reset state.
*/
static int au1000_init(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
unsigned long flags;
int i;
u32 control;
if (au1000_debug > 4)
printk("%s: au1000_init\n", dev->name);
/* bring the device out of reset */
enable_mac(dev, 1);
spin_lock_irqsave(&aup->lock, flags);
aup->mac->control = 0;
aup->tx_head = (aup->tx_dma_ring[0]->buff_stat & 0xC) >> 2;
aup->tx_tail = aup->tx_head;
aup->rx_head = (aup->rx_dma_ring[0]->buff_stat & 0xC) >> 2;
aup->mac->mac_addr_high = dev->dev_addr[5]<<8 | dev->dev_addr[4];
aup->mac->mac_addr_low = dev->dev_addr[3]<<24 | dev->dev_addr[2]<<16 |
dev->dev_addr[1]<<8 | dev->dev_addr[0];
for (i = 0; i < NUM_RX_DMA; i++) {
aup->rx_dma_ring[i]->buff_stat |= RX_DMA_ENABLE;
}
au_sync();
control = MAC_RX_ENABLE | MAC_TX_ENABLE;
#ifndef CONFIG_CPU_LITTLE_ENDIAN
control |= MAC_BIG_ENDIAN;
#endif
if (aup->phy_dev) {
if (aup->phy_dev->link && (DUPLEX_FULL == aup->phy_dev->duplex))
control |= MAC_FULL_DUPLEX;
else
control |= MAC_DISABLE_RX_OWN;
} else { /* PHY-less op, assume full-duplex */
control |= MAC_FULL_DUPLEX;
}
aup->mac->control = control;
aup->mac->vlan1_tag = 0x8100; /* activate vlan support */
au_sync();
spin_unlock_irqrestore(&aup->lock, flags);
return 0;
}
static inline void update_rx_stats(struct net_device *dev, u32 status)
{
struct au1000_private *aup = netdev_priv(dev);
struct net_device_stats *ps = &dev->stats;
ps->rx_packets++;
if (status & RX_MCAST_FRAME)
ps->multicast++;
if (status & RX_ERROR) {
ps->rx_errors++;
if (status & RX_MISSED_FRAME)
ps->rx_missed_errors++;
if (status & (RX_OVERLEN | RX_OVERLEN | RX_LEN_ERROR))
ps->rx_length_errors++;
if (status & RX_CRC_ERROR)
ps->rx_crc_errors++;
if (status & RX_COLL)
ps->collisions++;
}
else
ps->rx_bytes += status & RX_FRAME_LEN_MASK;
}
/*
* Au1000 receive routine.
*/
static int au1000_rx(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
struct sk_buff *skb;
volatile rx_dma_t *prxd;
u32 buff_stat, status;
db_dest_t *pDB;
u32 frmlen;
if (au1000_debug > 5)
printk("%s: au1000_rx head %d\n", dev->name, aup->rx_head);
prxd = aup->rx_dma_ring[aup->rx_head];
buff_stat = prxd->buff_stat;
while (buff_stat & RX_T_DONE) {
status = prxd->status;
pDB = aup->rx_db_inuse[aup->rx_head];
update_rx_stats(dev, status);
if (!(status & RX_ERROR)) {
/* good frame */
frmlen = (status & RX_FRAME_LEN_MASK);
frmlen -= 4; /* Remove FCS */
skb = dev_alloc_skb(frmlen + 2);
if (skb == NULL) {
printk(KERN_ERR
"%s: Memory squeeze, dropping packet.\n",
dev->name);
dev->stats.rx_dropped++;
continue;
}
skb_reserve(skb, 2); /* 16 byte IP header align */
skb_copy_to_linear_data(skb,
(unsigned char *)pDB->vaddr, frmlen);
skb_put(skb, frmlen);
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb); /* pass the packet to upper layers */
}
else {
if (au1000_debug > 4) {
if (status & RX_MISSED_FRAME)
printk("rx miss\n");
if (status & RX_WDOG_TIMER)
printk("rx wdog\n");
if (status & RX_RUNT)
printk("rx runt\n");
if (status & RX_OVERLEN)
printk("rx overlen\n");
if (status & RX_COLL)
printk("rx coll\n");
if (status & RX_MII_ERROR)
printk("rx mii error\n");
if (status & RX_CRC_ERROR)
printk("rx crc error\n");
if (status & RX_LEN_ERROR)
printk("rx len error\n");
if (status & RX_U_CNTRL_FRAME)
printk("rx u control frame\n");
if (status & RX_MISSED_FRAME)
printk("rx miss\n");
}
}
prxd->buff_stat = (u32)(pDB->dma_addr | RX_DMA_ENABLE);
aup->rx_head = (aup->rx_head + 1) & (NUM_RX_DMA - 1);
au_sync();
/* next descriptor */
prxd = aup->rx_dma_ring[aup->rx_head];
buff_stat = prxd->buff_stat;
}
return 0;
}
static void update_tx_stats(struct net_device *dev, u32 status)
{
struct au1000_private *aup = netdev_priv(dev);
struct net_device_stats *ps = &dev->stats;
if (status & TX_FRAME_ABORTED) {
if (!aup->phy_dev || (DUPLEX_FULL == aup->phy_dev->duplex)) {
if (status & (TX_JAB_TIMEOUT | TX_UNDERRUN)) {
/* any other tx errors are only valid
* in half duplex mode */
ps->tx_errors++;
ps->tx_aborted_errors++;
}
}
else {
ps->tx_errors++;
ps->tx_aborted_errors++;
if (status & (TX_NO_CARRIER | TX_LOSS_CARRIER))
ps->tx_carrier_errors++;
}
}
}
/*
* Called from the interrupt service routine to acknowledge
* the TX DONE bits. This is a must if the irq is setup as
* edge triggered.
*/
static void au1000_tx_ack(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
volatile tx_dma_t *ptxd;
ptxd = aup->tx_dma_ring[aup->tx_tail];
while (ptxd->buff_stat & TX_T_DONE) {
update_tx_stats(dev, ptxd->status);
ptxd->buff_stat &= ~TX_T_DONE;
ptxd->len = 0;
au_sync();
aup->tx_tail = (aup->tx_tail + 1) & (NUM_TX_DMA - 1);
ptxd = aup->tx_dma_ring[aup->tx_tail];
if (aup->tx_full) {
aup->tx_full = 0;
netif_wake_queue(dev);
}
}
}
/*
* Au1000 interrupt service routine.
*/
static irqreturn_t au1000_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
/* Handle RX interrupts first to minimize chance of overrun */
au1000_rx(dev);
au1000_tx_ack(dev);
return IRQ_RETVAL(1);
}
static int au1000_open(struct net_device *dev)
{
int retval;
struct au1000_private *aup = netdev_priv(dev);
if (au1000_debug > 4)
printk("%s: open: dev=%p\n", dev->name, dev);
if ((retval = request_irq(dev->irq, &au1000_interrupt, 0,
dev->name, dev))) {
printk(KERN_ERR "%s: unable to get IRQ %d\n",
dev->name, dev->irq);
return retval;
}
if ((retval = au1000_init(dev))) {
printk(KERN_ERR "%s: error in au1000_init\n", dev->name);
free_irq(dev->irq, dev);
return retval;
}
if (aup->phy_dev) {
/* cause the PHY state machine to schedule a link state check */
aup->phy_dev->state = PHY_CHANGELINK;
phy_start(aup->phy_dev);
}
netif_start_queue(dev);
if (au1000_debug > 4)
printk("%s: open: Initialization done.\n", dev->name);
return 0;
}
static int au1000_close(struct net_device *dev)
{
unsigned long flags;
struct au1000_private *const aup = netdev_priv(dev);
if (au1000_debug > 4)
printk("%s: close: dev=%p\n", dev->name, dev);
if (aup->phy_dev)
phy_stop(aup->phy_dev);
spin_lock_irqsave(&aup->lock, flags);
reset_mac_unlocked (dev);
/* stop the device */
netif_stop_queue(dev);
/* disable the interrupt */
free_irq(dev->irq, dev);
spin_unlock_irqrestore(&aup->lock, flags);
return 0;
}
/*
* Au1000 transmit routine.
*/
static int au1000_tx(struct sk_buff *skb, struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
struct net_device_stats *ps = &dev->stats;
volatile tx_dma_t *ptxd;
u32 buff_stat;
db_dest_t *pDB;
int i;
if (au1000_debug > 5)
printk("%s: tx: aup %x len=%d, data=%p, head %d\n",
dev->name, (unsigned)aup, skb->len,
skb->data, aup->tx_head);
ptxd = aup->tx_dma_ring[aup->tx_head];
buff_stat = ptxd->buff_stat;
if (buff_stat & TX_DMA_ENABLE) {
/* We've wrapped around and the transmitter is still busy */
netif_stop_queue(dev);
aup->tx_full = 1;
return NETDEV_TX_BUSY;
}
else if (buff_stat & TX_T_DONE) {
update_tx_stats(dev, ptxd->status);
ptxd->len = 0;
}
if (aup->tx_full) {
aup->tx_full = 0;
netif_wake_queue(dev);
}
pDB = aup->tx_db_inuse[aup->tx_head];
skb_copy_from_linear_data(skb, pDB->vaddr, skb->len);
if (skb->len < ETH_ZLEN) {
for (i=skb->len; i<ETH_ZLEN; i++) {
((char *)pDB->vaddr)[i] = 0;
}
ptxd->len = ETH_ZLEN;
}
else
ptxd->len = skb->len;
ps->tx_packets++;
ps->tx_bytes += ptxd->len;
ptxd->buff_stat = pDB->dma_addr | TX_DMA_ENABLE;
au_sync();
dev_kfree_skb(skb);
aup->tx_head = (aup->tx_head + 1) & (NUM_TX_DMA - 1);
dev->trans_start = jiffies;
return 0;
}
/*
* The Tx ring has been full longer than the watchdog timeout
* value. The transmitter must be hung?
*/
static void au1000_tx_timeout(struct net_device *dev)
{
printk(KERN_ERR "%s: au1000_tx_timeout: dev=%p\n", dev->name, dev);
reset_mac(dev);
au1000_init(dev);
dev->trans_start = jiffies;
netif_wake_queue(dev);
}
static void au1000_multicast_list(struct net_device *dev)
{
struct au1000_private *aup = netdev_priv(dev);
if (au1000_debug > 4)
printk("%s: au1000_multicast_list: flags=%x\n", dev->name, dev->flags);
if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
aup->mac->control |= MAC_PROMISCUOUS;
} else if ((dev->flags & IFF_ALLMULTI) ||
dev->mc_count > MULTICAST_FILTER_LIMIT) {
aup->mac->control |= MAC_PASS_ALL_MULTI;
aup->mac->control &= ~MAC_PROMISCUOUS;
printk(KERN_INFO "%s: Pass all multicast\n", dev->name);
} else {
int i;
struct dev_mc_list *mclist;
u32 mc_filter[2]; /* Multicast hash filter */
mc_filter[1] = mc_filter[0] = 0;
for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
i++, mclist = mclist->next) {
set_bit(ether_crc(ETH_ALEN, mclist->dmi_addr)>>26,
(long *)mc_filter);
}
aup->mac->multi_hash_high = mc_filter[1];
aup->mac->multi_hash_low = mc_filter[0];
aup->mac->control &= ~MAC_PROMISCUOUS;
aup->mac->control |= MAC_HASH_MODE;
}
}
static int au1000_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct au1000_private *aup = netdev_priv(dev);
if (!netif_running(dev)) return -EINVAL;
if (!aup->phy_dev) return -EINVAL; // PHY not controllable
return phy_mii_ioctl(aup->phy_dev, if_mii(rq), cmd);
}
static const struct net_device_ops au1000_netdev_ops = {
.ndo_open = au1000_open,
.ndo_stop = au1000_close,
.ndo_start_xmit = au1000_tx,
.ndo_set_multicast_list = au1000_multicast_list,
.ndo_do_ioctl = au1000_ioctl,
.ndo_tx_timeout = au1000_tx_timeout,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
.ndo_change_mtu = eth_change_mtu,
};
static struct net_device * au1000_probe(int port_num)
{
static unsigned version_printed = 0;
struct au1000_private *aup = NULL;
struct net_device *dev = NULL;
db_dest_t *pDB, *pDBfree;
char ethaddr[6];
int irq, i, err;
u32 base, macen;
if (port_num >= NUM_ETH_INTERFACES)
return NULL;
base = CPHYSADDR(iflist[port_num].base_addr );
macen = CPHYSADDR(iflist[port_num].macen_addr);
irq = iflist[port_num].irq;
if (!request_mem_region( base, MAC_IOSIZE, "Au1x00 ENET") ||
!request_mem_region(macen, 4, "Au1x00 ENET"))
return NULL;
if (version_printed++ == 0)
printk("%s version %s %s\n", DRV_NAME, DRV_VERSION, DRV_AUTHOR);
dev = alloc_etherdev(sizeof(struct au1000_private));
if (!dev) {
printk(KERN_ERR "%s: alloc_etherdev failed\n", DRV_NAME);
return NULL;
}
if ((err = register_netdev(dev)) != 0) {
printk(KERN_ERR "%s: Cannot register net device, error %d\n",
DRV_NAME, err);
free_netdev(dev);
return NULL;
}
printk("%s: Au1xx0 Ethernet found at 0x%x, irq %d\n",
dev->name, base, irq);
aup = netdev_priv(dev);
spin_lock_init(&aup->lock);
/* Allocate the data buffers */
/* Snooping works fine with eth on all au1xxx */
aup->vaddr = (u32)dma_alloc_noncoherent(NULL, MAX_BUF_SIZE *
(NUM_TX_BUFFS + NUM_RX_BUFFS),
&aup->dma_addr, 0);
if (!aup->vaddr) {
free_netdev(dev);
release_mem_region( base, MAC_IOSIZE);
release_mem_region(macen, 4);
return NULL;
}
/* aup->mac is the base address of the MAC's registers */
aup->mac = (volatile mac_reg_t *)iflist[port_num].base_addr;
/* Setup some variables for quick register address access */
aup->enable = (volatile u32 *)iflist[port_num].macen_addr;
aup->mac_id = port_num;
au_macs[port_num] = aup;
if (port_num == 0) {
if (prom_get_ethernet_addr(ethaddr) == 0)
memcpy(au1000_mac_addr, ethaddr, sizeof(au1000_mac_addr));
else {
printk(KERN_INFO "%s: No MAC address found\n",
dev->name);
/* Use the hard coded MAC addresses */
}
setup_hw_rings(aup, MAC0_RX_DMA_ADDR, MAC0_TX_DMA_ADDR);
} else if (port_num == 1)
setup_hw_rings(aup, MAC1_RX_DMA_ADDR, MAC1_TX_DMA_ADDR);
/*
* Assign to the Ethernet ports two consecutive MAC addresses
* to match those that are printed on their stickers
*/
memcpy(dev->dev_addr, au1000_mac_addr, sizeof(au1000_mac_addr));
dev->dev_addr[5] += port_num;
*aup->enable = 0;
aup->mac_enabled = 0;
aup->mii_bus = mdiobus_alloc();
if (aup->mii_bus == NULL)
goto err_out;
aup->mii_bus->priv = dev;
aup->mii_bus->read = au1000_mdiobus_read;
aup->mii_bus->write = au1000_mdiobus_write;
aup->mii_bus->reset = au1000_mdiobus_reset;
aup->mii_bus->name = "au1000_eth_mii";
snprintf(aup->mii_bus->id, MII_BUS_ID_SIZE, "%x", aup->mac_id);
aup->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
for(i = 0; i < PHY_MAX_ADDR; ++i)
aup->mii_bus->irq[i] = PHY_POLL;
/* if known, set corresponding PHY IRQs */
#if defined(AU1XXX_PHY_STATIC_CONFIG)
# if defined(AU1XXX_PHY0_IRQ)
if (AU1XXX_PHY0_BUSID == aup->mac_id)
aup->mii_bus->irq[AU1XXX_PHY0_ADDR] = AU1XXX_PHY0_IRQ;
# endif
# if defined(AU1XXX_PHY1_IRQ)
if (AU1XXX_PHY1_BUSID == aup->mac_id)
aup->mii_bus->irq[AU1XXX_PHY1_ADDR] = AU1XXX_PHY1_IRQ;
# endif
#endif
mdiobus_register(aup->mii_bus);
if (mii_probe(dev) != 0) {
goto err_out;
}
pDBfree = NULL;
/* setup the data buffer descriptors and attach a buffer to each one */
pDB = aup->db;
for (i = 0; i < (NUM_TX_BUFFS+NUM_RX_BUFFS); i++) {
pDB->pnext = pDBfree;
pDBfree = pDB;
pDB->vaddr = (u32 *)((unsigned)aup->vaddr + MAX_BUF_SIZE*i);
pDB->dma_addr = (dma_addr_t)virt_to_bus(pDB->vaddr);
pDB++;
}
aup->pDBfree = pDBfree;
for (i = 0; i < NUM_RX_DMA; i++) {
pDB = GetFreeDB(aup);
if (!pDB) {
goto err_out;
}
aup->rx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr;
aup->rx_db_inuse[i] = pDB;
}
for (i = 0; i < NUM_TX_DMA; i++) {
pDB = GetFreeDB(aup);
if (!pDB) {
goto err_out;
}
aup->tx_dma_ring[i]->buff_stat = (unsigned)pDB->dma_addr;
aup->tx_dma_ring[i]->len = 0;
aup->tx_db_inuse[i] = pDB;
}
dev->base_addr = base;
dev->irq = irq;
dev->netdev_ops = &au1000_netdev_ops;
SET_ETHTOOL_OPS(dev, &au1000_ethtool_ops);
dev->watchdog_timeo = ETH_TX_TIMEOUT;
/*
* The boot code uses the ethernet controller, so reset it to start
* fresh. au1000_init() expects that the device is in reset state.
*/
reset_mac(dev);
return dev;
err_out:
if (aup->mii_bus != NULL) {
mdiobus_unregister(aup->mii_bus);
mdiobus_free(aup->mii_bus);
}
/* here we should have a valid dev plus aup-> register addresses
* so we can reset the mac properly.*/
reset_mac(dev);
for (i = 0; i < NUM_RX_DMA; i++) {
if (aup->rx_db_inuse[i])
ReleaseDB(aup, aup->rx_db_inuse[i]);
}
for (i = 0; i < NUM_TX_DMA; i++) {
if (aup->tx_db_inuse[i])
ReleaseDB(aup, aup->tx_db_inuse[i]);
}
dma_free_noncoherent(NULL, MAX_BUF_SIZE * (NUM_TX_BUFFS + NUM_RX_BUFFS),
(void *)aup->vaddr, aup->dma_addr);
unregister_netdev(dev);
free_netdev(dev);
release_mem_region( base, MAC_IOSIZE);
release_mem_region(macen, 4);
return NULL;
}
/*
* Setup the base address and interrupt of the Au1xxx ethernet macs
* based on cpu type and whether the interface is enabled in sys_pinfunc
* register. The last interface is enabled if SYS_PF_NI2 (bit 4) is 0.
*/
static int __init au1000_init_module(void)
{
int ni = (int)((au_readl(SYS_PINFUNC) & (u32)(SYS_PF_NI2)) >> 4);
struct net_device *dev;
int i, found_one = 0;
num_ifs = NUM_ETH_INTERFACES - ni;
for(i = 0; i < num_ifs; i++) {
dev = au1000_probe(i);
iflist[i].dev = dev;
if (dev)
found_one++;
}
if (!found_one)
return -ENODEV;
return 0;
}
static void __exit au1000_cleanup_module(void)
{
int i, j;
struct net_device *dev;
struct au1000_private *aup;
for (i = 0; i < num_ifs; i++) {
dev = iflist[i].dev;
if (dev) {
aup = netdev_priv(dev);
unregister_netdev(dev);
mdiobus_unregister(aup->mii_bus);
mdiobus_free(aup->mii_bus);
for (j = 0; j < NUM_RX_DMA; j++)
if (aup->rx_db_inuse[j])
ReleaseDB(aup, aup->rx_db_inuse[j]);
for (j = 0; j < NUM_TX_DMA; j++)
if (aup->tx_db_inuse[j])
ReleaseDB(aup, aup->tx_db_inuse[j]);
dma_free_noncoherent(NULL, MAX_BUF_SIZE *
(NUM_TX_BUFFS + NUM_RX_BUFFS),
(void *)aup->vaddr, aup->dma_addr);
release_mem_region(dev->base_addr, MAC_IOSIZE);
release_mem_region(CPHYSADDR(iflist[i].macen_addr), 4);
free_netdev(dev);
}
}
}
module_init(au1000_init_module);
module_exit(au1000_cleanup_module);
Reference in New Issue View Git Blame Copy Permalink