Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
kernel-fxtec-pro1x/drivers/net/fec_mpc52xx.c
David S. Miller babcda74e9 drivers/net: Kill now superfluous ->last_rx stores. 
The generic packet receive code takes care of setting
netdev->last_rx when necessary, for the sake of the
bonding ARP monitor.

Drivers need not do it any more.

Some cases had to be skipped over because the drivers
were making use of the ->last_rx value themselves.

Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-03 21:11:17 -08:00

1180 lines
30 KiB
C
Raw Blame History

/*
* Driver for the MPC5200 Fast Ethernet Controller
*
* Originally written by Dale Farnsworth <dfarnsworth@mvista.com> and
* now maintained by Sylvain Munaut <tnt@246tNt.com>
*
* Copyright (C) 2007 Domen Puncer, Telargo, Inc.
* Copyright (C) 2007 Sylvain Munaut <tnt@246tNt.com>
* Copyright (C) 2003-2004 MontaVista, Software, Inc.
*
* 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/kernel.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/crc32.h>
#include <linux/hardirq.h>
#include <linux/delay.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/skbuff.h>
#include <asm/io.h>
#include <asm/delay.h>
#include <asm/mpc52xx.h>
#include <sysdev/bestcomm/bestcomm.h>
#include <sysdev/bestcomm/fec.h>
#include "fec_mpc52xx.h"
#define DRIVER_NAME "mpc52xx-fec"
#define FEC5200_PHYADDR_NONE (-1)
#define FEC5200_PHYADDR_7WIRE (-2)
/* Private driver data structure */
struct mpc52xx_fec_priv {
int duplex;
int speed;
int r_irq;
int t_irq;
struct mpc52xx_fec __iomem *fec;
struct bcom_task *rx_dmatsk;
struct bcom_task *tx_dmatsk;
spinlock_t lock;
int msg_enable;
/* MDIO link details */
int phy_addr;
unsigned int phy_speed;
struct phy_device *phydev;
enum phy_state link;
};
static irqreturn_t mpc52xx_fec_interrupt(int, void *);
static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *);
static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *);
static void mpc52xx_fec_stop(struct net_device *dev);
static void mpc52xx_fec_start(struct net_device *dev);
static void mpc52xx_fec_reset(struct net_device *dev);
static u8 mpc52xx_fec_mac_addr[6];
module_param_array_named(mac, mpc52xx_fec_mac_addr, byte, NULL, 0);
MODULE_PARM_DESC(mac, "six hex digits, ie. 0x1,0x2,0xc0,0x01,0xba,0xbe");
#define MPC52xx_MESSAGES_DEFAULT ( NETIF_MSG_DRV | NETIF_MSG_PROBE | \
NETIF_MSG_LINK | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP)
static int debug = -1; /* the above default */
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "debugging messages level");
static void mpc52xx_fec_tx_timeout(struct net_device *dev)
{
dev_warn(&dev->dev, "transmit timed out\n");
mpc52xx_fec_reset(dev);
dev->stats.tx_errors++;
netif_wake_queue(dev);
}
static void mpc52xx_fec_set_paddr(struct net_device *dev, u8 *mac)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
struct mpc52xx_fec __iomem *fec = priv->fec;
out_be32(&fec->paddr1, *(u32 *)(&mac[0]));
out_be32(&fec->paddr2, (*(u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE);
}
static void mpc52xx_fec_get_paddr(struct net_device *dev, u8 *mac)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
struct mpc52xx_fec __iomem *fec = priv->fec;
*(u32 *)(&mac[0]) = in_be32(&fec->paddr1);
*(u16 *)(&mac[4]) = in_be32(&fec->paddr2) >> 16;
}
static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr)
{
struct sockaddr *sock = addr;
memcpy(dev->dev_addr, sock->sa_data, dev->addr_len);
mpc52xx_fec_set_paddr(dev, sock->sa_data);
return 0;
}
static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s)
{
while (!bcom_queue_empty(s)) {
struct bcom_fec_bd *bd;
struct sk_buff *skb;
skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);
dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_FROM_DEVICE);
kfree_skb(skb);
}
}
static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
{
while (!bcom_queue_full(rxtsk)) {
struct sk_buff *skb;
struct bcom_fec_bd *bd;
skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
if (skb == NULL)
return -EAGAIN;
/* zero out the initial receive buffers to aid debugging */
memset(skb->data, 0, FEC_RX_BUFFER_SIZE);
bd = (struct bcom_fec_bd *)bcom_prepare_next_buffer(rxtsk);
bd->status = FEC_RX_BUFFER_SIZE;
bd->skb_pa = dma_map_single(&dev->dev, skb->data,
FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
bcom_submit_next_buffer(rxtsk, skb);
}
return 0;
}
/* based on generic_adjust_link from fs_enet-main.c */
static void mpc52xx_fec_adjust_link(struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
struct phy_device *phydev = priv->phydev;
int new_state = 0;
if (phydev->link != PHY_DOWN) {
if (phydev->duplex != priv->duplex) {
struct mpc52xx_fec __iomem *fec = priv->fec;
u32 rcntrl;
u32 tcntrl;
new_state = 1;
priv->duplex = phydev->duplex;
rcntrl = in_be32(&fec->r_cntrl);
tcntrl = in_be32(&fec->x_cntrl);
rcntrl &= ~FEC_RCNTRL_DRT;
tcntrl &= ~FEC_TCNTRL_FDEN;
if (phydev->duplex == DUPLEX_FULL)
tcntrl |= FEC_TCNTRL_FDEN; /* FD enable */
else
rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
out_be32(&fec->r_cntrl, rcntrl);
out_be32(&fec->x_cntrl, tcntrl);
}
if (phydev->speed != priv->speed) {
new_state = 1;
priv->speed = phydev->speed;
}
if (priv->link == PHY_DOWN) {
new_state = 1;
priv->link = phydev->link;
}
} else if (priv->link) {
new_state = 1;
priv->link = PHY_DOWN;
priv->speed = 0;
priv->duplex = -1;
}
if (new_state && netif_msg_link(priv))
phy_print_status(phydev);
}
static int mpc52xx_fec_init_phy(struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
struct phy_device *phydev;
char phy_id[BUS_ID_SIZE];
snprintf(phy_id, BUS_ID_SIZE, "%x:%02x",
(unsigned int)dev->base_addr, priv->phy_addr);
priv->link = PHY_DOWN;
priv->speed = 0;
priv->duplex = -1;
phydev = phy_connect(dev, phy_id, &mpc52xx_fec_adjust_link, 0, PHY_INTERFACE_MODE_MII);
if (IS_ERR(phydev)) {
dev_err(&dev->dev, "phy_connect failed\n");
return PTR_ERR(phydev);
}
dev_info(&dev->dev, "attached phy %i to driver %s\n",
phydev->addr, phydev->drv->name);
priv->phydev = phydev;
return 0;
}
static int mpc52xx_fec_phy_start(struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
int err;
if (priv->phy_addr < 0)
return 0;
err = mpc52xx_fec_init_phy(dev);
if (err) {
dev_err(&dev->dev, "mpc52xx_fec_init_phy failed\n");
return err;
}
/* reset phy - this also wakes it from PDOWN */
phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
phy_start(priv->phydev);
return 0;
}
static void mpc52xx_fec_phy_stop(struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
if (!priv->phydev)
return;
phy_disconnect(priv->phydev);
/* power down phy */
phy_stop(priv->phydev);
phy_write(priv->phydev, MII_BMCR, BMCR_PDOWN);
}
static int mpc52xx_fec_phy_mii_ioctl(struct mpc52xx_fec_priv *priv,
struct mii_ioctl_data *mii_data, int cmd)
{
if (!priv->phydev)
return -ENOTSUPP;
return phy_mii_ioctl(priv->phydev, mii_data, cmd);
}
static void mpc52xx_fec_phy_hw_init(struct mpc52xx_fec_priv *priv)
{
struct mpc52xx_fec __iomem *fec = priv->fec;
if (priv->phydev)
return;
out_be32(&fec->mii_speed, priv->phy_speed);
}
static int mpc52xx_fec_open(struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
int err = -EBUSY;
if (request_irq(dev->irq, &mpc52xx_fec_interrupt, IRQF_SHARED,
DRIVER_NAME "_ctrl", dev)) {
dev_err(&dev->dev, "ctrl interrupt request failed\n");
goto out;
}
if (request_irq(priv->r_irq, &mpc52xx_fec_rx_interrupt, 0,
DRIVER_NAME "_rx", dev)) {
dev_err(&dev->dev, "rx interrupt request failed\n");
goto free_ctrl_irq;
}
if (request_irq(priv->t_irq, &mpc52xx_fec_tx_interrupt, 0,
DRIVER_NAME "_tx", dev)) {
dev_err(&dev->dev, "tx interrupt request failed\n");
goto free_2irqs;
}
bcom_fec_rx_reset(priv->rx_dmatsk);
bcom_fec_tx_reset(priv->tx_dmatsk);
err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
if (err) {
dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
goto free_irqs;
}
err = mpc52xx_fec_phy_start(dev);
if (err)
goto free_skbs;
bcom_enable(priv->rx_dmatsk);
bcom_enable(priv->tx_dmatsk);
mpc52xx_fec_start(dev);
netif_start_queue(dev);
return 0;
free_skbs:
mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
free_irqs:
free_irq(priv->t_irq, dev);
free_2irqs:
free_irq(priv->r_irq, dev);
free_ctrl_irq:
free_irq(dev->irq, dev);
out:
return err;
}
static int mpc52xx_fec_close(struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
netif_stop_queue(dev);
mpc52xx_fec_stop(dev);
mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
free_irq(dev->irq, dev);
free_irq(priv->r_irq, dev);
free_irq(priv->t_irq, dev);
mpc52xx_fec_phy_stop(dev);
return 0;
}
/* This will only be invoked if your driver is _not_ in XOFF state.
* What this means is that you need not check it, and that this
* invariant will hold if you make sure that the netif_*_queue()
* calls are done at the proper times.
*/
static int mpc52xx_fec_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
struct bcom_fec_bd *bd;
if (bcom_queue_full(priv->tx_dmatsk)) {
if (net_ratelimit())
dev_err(&dev->dev, "transmit queue overrun\n");
return 1;
}
spin_lock_irq(&priv->lock);
dev->trans_start = jiffies;
bd = (struct bcom_fec_bd *)
bcom_prepare_next_buffer(priv->tx_dmatsk);
bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
bd->skb_pa = dma_map_single(&dev->dev, skb->data, skb->len, DMA_TO_DEVICE);
bcom_submit_next_buffer(priv->tx_dmatsk, skb);
if (bcom_queue_full(priv->tx_dmatsk)) {
netif_stop_queue(dev);
}
spin_unlock_irq(&priv->lock);
return 0;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void mpc52xx_fec_poll_controller(struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
disable_irq(priv->t_irq);
mpc52xx_fec_tx_interrupt(priv->t_irq, dev);
enable_irq(priv->t_irq);
disable_irq(priv->r_irq);
mpc52xx_fec_rx_interrupt(priv->r_irq, dev);
enable_irq(priv->r_irq);
}
#endif
/* This handles BestComm transmit task interrupts
*/
static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
spin_lock(&priv->lock);
while (bcom_buffer_done(priv->tx_dmatsk)) {
struct sk_buff *skb;
struct bcom_fec_bd *bd;
skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
(struct bcom_bd **)&bd);
dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_TO_DEVICE);
dev_kfree_skb_irq(skb);
}
netif_wake_queue(dev);
spin_unlock(&priv->lock);
return IRQ_HANDLED;
}
static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
while (bcom_buffer_done(priv->rx_dmatsk)) {
struct sk_buff *skb;
struct sk_buff *rskb;
struct bcom_fec_bd *bd;
u32 status;
rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
(struct bcom_bd **)&bd);
dma_unmap_single(&dev->dev, bd->skb_pa, rskb->len, DMA_FROM_DEVICE);
/* Test for errors in received frame */
if (status & BCOM_FEC_RX_BD_ERRORS) {
/* Drop packet and reuse the buffer */
bd = (struct bcom_fec_bd *)
bcom_prepare_next_buffer(priv->rx_dmatsk);
bd->status = FEC_RX_BUFFER_SIZE;
bd->skb_pa = dma_map_single(&dev->dev, rskb->data,
FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
dev->stats.rx_dropped++;
continue;
}
/* skbs are allocated on open, so now we allocate a new one,
* and remove the old (with the packet) */
skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
if (skb) {
/* Process the received skb */
int length = status & BCOM_FEC_RX_BD_LEN_MASK;
skb_put(rskb, length - 4); /* length without CRC32 */
rskb->dev = dev;
rskb->protocol = eth_type_trans(rskb, dev);
netif_rx(rskb);
} else {
/* Can't get a new one : reuse the same & drop pkt */
dev_notice(&dev->dev, "Memory squeeze, dropping packet.\n");
dev->stats.rx_dropped++;
skb = rskb;
}
bd = (struct bcom_fec_bd *)
bcom_prepare_next_buffer(priv->rx_dmatsk);
bd->status = FEC_RX_BUFFER_SIZE;
bd->skb_pa = dma_map_single(&dev->dev, skb->data,
FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
bcom_submit_next_buffer(priv->rx_dmatsk, skb);
}
return IRQ_HANDLED;
}
static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
struct mpc52xx_fec __iomem *fec = priv->fec;
u32 ievent;
ievent = in_be32(&fec->ievent);
ievent &= ~FEC_IEVENT_MII; /* mii is handled separately */
if (!ievent)
return IRQ_NONE;
out_be32(&fec->ievent, ievent); /* clear pending events */
/* on fifo error, soft-reset fec */
if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
mpc52xx_fec_reset(dev);
netif_wake_queue(dev);
return IRQ_HANDLED;
}
if (ievent & ~FEC_IEVENT_TFINT)
dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
return IRQ_HANDLED;
}
/*
* Get the current statistics.
* This may be called with the card open or closed.
*/
static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
struct net_device_stats *stats = &dev->stats;
struct mpc52xx_fec __iomem *fec = priv->fec;
stats->rx_bytes = in_be32(&fec->rmon_r_octets);
stats->rx_packets = in_be32(&fec->rmon_r_packets);
stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
in_be32(&fec->rmon_r_undersize) +
in_be32(&fec->rmon_r_oversize) +
in_be32(&fec->rmon_r_frag) +
in_be32(&fec->rmon_r_jab);
stats->tx_bytes = in_be32(&fec->rmon_t_octets);
stats->tx_packets = in_be32(&fec->rmon_t_packets);
stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
in_be32(&fec->rmon_t_undersize) +
in_be32(&fec->rmon_t_oversize) +
in_be32(&fec->rmon_t_frag) +
in_be32(&fec->rmon_t_jab);
stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
stats->collisions = in_be32(&fec->rmon_t_col);
/* detailed rx_errors: */
stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
+ in_be32(&fec->rmon_r_oversize)
+ in_be32(&fec->rmon_r_frag)
+ in_be32(&fec->rmon_r_jab);
stats->rx_over_errors = in_be32(&fec->r_macerr);
stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
/* detailed tx_errors: */
stats->tx_aborted_errors = 0;
stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
return stats;
}
/*
* Read MIB counters in order to reset them,
* then zero all the stats fields in memory
*/
static void mpc52xx_fec_reset_stats(struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
struct mpc52xx_fec __iomem *fec = priv->fec;
out_be32(&fec->mib_control, FEC_MIB_DISABLE);
memset_io(&fec->rmon_t_drop, 0,
offsetof(struct mpc52xx_fec, reserved10) -
offsetof(struct mpc52xx_fec, rmon_t_drop));
out_be32(&fec->mib_control, 0);
memset(&dev->stats, 0, sizeof(dev->stats));
}
/*
* Set or clear the multicast filter for this adaptor.
*/
static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
struct mpc52xx_fec __iomem *fec = priv->fec;
u32 rx_control;
rx_control = in_be32(&fec->r_cntrl);
if (dev->flags & IFF_PROMISC) {
rx_control |= FEC_RCNTRL_PROM;
out_be32(&fec->r_cntrl, rx_control);
} else {
rx_control &= ~FEC_RCNTRL_PROM;
out_be32(&fec->r_cntrl, rx_control);
if (dev->flags & IFF_ALLMULTI) {
out_be32(&fec->gaddr1, 0xffffffff);
out_be32(&fec->gaddr2, 0xffffffff);
} else {
u32 crc;
int i;
struct dev_mc_list *dmi;
u32 gaddr1 = 0x00000000;
u32 gaddr2 = 0x00000000;
dmi = dev->mc_list;
for (i=0; i<dev->mc_count; i++) {
crc = ether_crc_le(6, dmi->dmi_addr) >> 26;
if (crc >= 32)
gaddr1 |= 1 << (crc-32);
else
gaddr2 |= 1 << crc;
dmi = dmi->next;
}
out_be32(&fec->gaddr1, gaddr1);
out_be32(&fec->gaddr2, gaddr2);
}
}
}
/**
* mpc52xx_fec_hw_init
* @dev: network device
*
* Setup various hardware setting, only needed once on start
*/
static void mpc52xx_fec_hw_init(struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
struct mpc52xx_fec __iomem *fec = priv->fec;
int i;
/* Whack a reset. We should wait for this. */
out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
for (i = 0; i < FEC_RESET_DELAY; ++i) {
if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
break;
udelay(1);
}
if (i == FEC_RESET_DELAY)
dev_err(&dev->dev, "FEC Reset timeout!\n");
/* set pause to 0x20 frames */
out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
/* high service request will be deasserted when there's < 7 bytes in fifo
* low service request will be deasserted when there's < 4*7 bytes in fifo
*/
out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
/* alarm when <= x bytes in FIFO */
out_be32(&fec->rfifo_alarm, 0x0000030c);
out_be32(&fec->tfifo_alarm, 0x00000100);
/* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
/* enable crc generation */
out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
out_be32(&fec->iaddr1, 0x00000000); /* No individual filter */
out_be32(&fec->iaddr2, 0x00000000); /* No individual filter */
/* set phy speed.
* this can't be done in phy driver, since it needs to be called
* before fec stuff (even on resume) */
mpc52xx_fec_phy_hw_init(priv);
}
/**
* mpc52xx_fec_start
* @dev: network device
*
* This function is called to start or restart the FEC during a link
* change. This happens on fifo errors or when switching between half
* and full duplex.
*/
static void mpc52xx_fec_start(struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
struct mpc52xx_fec __iomem *fec = priv->fec;
u32 rcntrl;
u32 tcntrl;
u32 tmp;
/* clear sticky error bits */
tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
/* FIFOs will reset on mpc52xx_fec_enable */
out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
/* Set station address. */
mpc52xx_fec_set_paddr(dev, dev->dev_addr);
mpc52xx_fec_set_multicast_list(dev);
/* set max frame len, enable flow control, select mii mode */
rcntrl = FEC_RX_BUFFER_SIZE << 16; /* max frame length */
rcntrl |= FEC_RCNTRL_FCE;
if (priv->phy_addr != FEC5200_PHYADDR_7WIRE)
rcntrl |= FEC_RCNTRL_MII_MODE;
if (priv->duplex == DUPLEX_FULL)
tcntrl = FEC_TCNTRL_FDEN; /* FD enable */
else {
rcntrl |= FEC_RCNTRL_DRT; /* disable Rx on Tx (HD) */
tcntrl = 0;
}
out_be32(&fec->r_cntrl, rcntrl);
out_be32(&fec->x_cntrl, tcntrl);
/* Clear any outstanding interrupt. */
out_be32(&fec->ievent, 0xffffffff);
/* Enable interrupts we wish to service. */
out_be32(&fec->imask, FEC_IMASK_ENABLE);
/* And last, enable the transmit and receive processing. */
out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
out_be32(&fec->r_des_active, 0x01000000);
}
/**
* mpc52xx_fec_stop
* @dev: network device
*
* stop all activity on fec and empty dma buffers
*/
static void mpc52xx_fec_stop(struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
struct mpc52xx_fec __iomem *fec = priv->fec;
unsigned long timeout;
/* disable all interrupts */
out_be32(&fec->imask, 0);
/* Disable the rx task. */
bcom_disable(priv->rx_dmatsk);
/* Wait for tx queue to drain, but only if we're in process context */
if (!in_interrupt()) {
timeout = jiffies + msecs_to_jiffies(2000);
while (time_before(jiffies, timeout) &&
!bcom_queue_empty(priv->tx_dmatsk))
msleep(100);
if (time_after_eq(jiffies, timeout))
dev_err(&dev->dev, "queues didn't drain\n");
#if 1
if (time_after_eq(jiffies, timeout)) {
dev_err(&dev->dev, " tx: index: %i, outdex: %i\n",
priv->tx_dmatsk->index,
priv->tx_dmatsk->outdex);
dev_err(&dev->dev, " rx: index: %i, outdex: %i\n",
priv->rx_dmatsk->index,
priv->rx_dmatsk->outdex);
}
#endif
}
bcom_disable(priv->tx_dmatsk);
/* Stop FEC */
out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
return;
}
/* reset fec and bestcomm tasks */
static void mpc52xx_fec_reset(struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
struct mpc52xx_fec __iomem *fec = priv->fec;
mpc52xx_fec_stop(dev);
out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
mpc52xx_fec_hw_init(dev);
phy_stop(priv->phydev);
phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
phy_start(priv->phydev);
bcom_fec_rx_reset(priv->rx_dmatsk);
bcom_fec_tx_reset(priv->tx_dmatsk);
mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
bcom_enable(priv->rx_dmatsk);
bcom_enable(priv->tx_dmatsk);
mpc52xx_fec_start(dev);
}
/* ethtool interface */
static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info)
{
strcpy(info->driver, DRIVER_NAME);
}
static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
return phy_ethtool_gset(priv->phydev, cmd);
}
static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
return phy_ethtool_sset(priv->phydev, cmd);
}
static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
return priv->msg_enable;
}
static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
priv->msg_enable = level;
}
static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
.get_drvinfo = mpc52xx_fec_get_drvinfo,
.get_settings = mpc52xx_fec_get_settings,
.set_settings = mpc52xx_fec_set_settings,
.get_link = ethtool_op_get_link,
.get_msglevel = mpc52xx_fec_get_msglevel,
.set_msglevel = mpc52xx_fec_set_msglevel,
};
static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct mpc52xx_fec_priv *priv = netdev_priv(dev);
return mpc52xx_fec_phy_mii_ioctl(priv, if_mii(rq), cmd);
}
/* ======================================================================== */
/* OF Driver */
/* ======================================================================== */
static int __devinit
mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match)
{
int rv;
struct net_device *ndev;
struct mpc52xx_fec_priv *priv = NULL;
struct resource mem;
struct device_node *phy_node;
const phandle *phy_handle;
const u32 *prop;
int prop_size;
phys_addr_t rx_fifo;
phys_addr_t tx_fifo;
/* Get the ether ndev & it's private zone */
ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
if (!ndev)
return -ENOMEM;
priv = netdev_priv(ndev);
/* Reserve FEC control zone */
rv = of_address_to_resource(op->node, 0, &mem);
if (rv) {
printk(KERN_ERR DRIVER_NAME ": "
"Error while parsing device node resource\n" );
return rv;
}
if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
printk(KERN_ERR DRIVER_NAME
" - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
(unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
return -EINVAL;
}
if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), DRIVER_NAME))
return -EBUSY;
/* Init ether ndev with what we have */
ndev->open = mpc52xx_fec_open;
ndev->stop = mpc52xx_fec_close;
ndev->hard_start_xmit = mpc52xx_fec_hard_start_xmit;
ndev->do_ioctl = mpc52xx_fec_ioctl;
ndev->ethtool_ops = &mpc52xx_fec_ethtool_ops;
ndev->get_stats = mpc52xx_fec_get_stats;
ndev->set_mac_address = mpc52xx_fec_set_mac_address;
ndev->set_multicast_list = mpc52xx_fec_set_multicast_list;
ndev->tx_timeout = mpc52xx_fec_tx_timeout;
ndev->watchdog_timeo = FEC_WATCHDOG_TIMEOUT;
ndev->base_addr = mem.start;
#ifdef CONFIG_NET_POLL_CONTROLLER
ndev->poll_controller = mpc52xx_fec_poll_controller;
#endif
priv->t_irq = priv->r_irq = ndev->irq = NO_IRQ; /* IRQ are free for now */
spin_lock_init(&priv->lock);
/* ioremap the zones */
priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
if (!priv->fec) {
rv = -ENOMEM;
goto probe_error;
}
/* Bestcomm init */
rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
rv = -ENOMEM;
goto probe_error;
}
/* Get the IRQ we need one by one */
/* Control */
ndev->irq = irq_of_parse_and_map(op->node, 0);
/* RX */
priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
/* TX */
priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
/* MAC address init */
if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
else
mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
/*
* Link mode configuration
*/
/* Start with safe defaults for link connection */
priv->phy_addr = FEC5200_PHYADDR_NONE;
priv->speed = 100;
priv->duplex = DUPLEX_HALF;
priv->phy_speed = ((mpc52xx_find_ipb_freq(op->node) >> 20) / 5) << 1;
/* the 7-wire property means don't use MII mode */
if (of_find_property(op->node, "fsl,7-wire-mode", NULL))
priv->phy_addr = FEC5200_PHYADDR_7WIRE;
/* The current speed preconfigures the speed of the MII link */
prop = of_get_property(op->node, "current-speed", &prop_size);
if (prop && (prop_size >= sizeof(u32) * 2)) {
priv->speed = prop[0];
priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
}
/* If there is a phy handle, setup link to that phy */
phy_handle = of_get_property(op->node, "phy-handle", &prop_size);
if (phy_handle && (prop_size >= sizeof(phandle))) {
phy_node = of_find_node_by_phandle(*phy_handle);
prop = of_get_property(phy_node, "reg", &prop_size);
if (prop && (prop_size >= sizeof(u32)))
if ((*prop >= 0) && (*prop < PHY_MAX_ADDR))
priv->phy_addr = *prop;
of_node_put(phy_node);
}
/* Hardware init */
mpc52xx_fec_hw_init(ndev);
mpc52xx_fec_reset_stats(ndev);
SET_NETDEV_DEV(ndev, &op->dev);
/* Register the new network device */
rv = register_netdev(ndev);
if (rv < 0)
goto probe_error;
/* Now report the link setup */
switch (priv->phy_addr) {
case FEC5200_PHYADDR_NONE:
dev_info(&ndev->dev, "Fixed speed MII link: %i%cD\n",
priv->speed, priv->duplex ? 'F' : 'H');
break;
case FEC5200_PHYADDR_7WIRE:
dev_info(&ndev->dev, "using 7-wire PHY mode\n");
break;
default:
dev_info(&ndev->dev, "Using PHY at MDIO address %i\n",
priv->phy_addr);
}
/* We're done ! */
dev_set_drvdata(&op->dev, ndev);
return 0;
/* Error handling - free everything that might be allocated */
probe_error:
irq_dispose_mapping(ndev->irq);
if (priv->rx_dmatsk)
bcom_fec_rx_release(priv->rx_dmatsk);
if (priv->tx_dmatsk)
bcom_fec_tx_release(priv->tx_dmatsk);
if (priv->fec)
iounmap(priv->fec);
release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
free_netdev(ndev);
return rv;
}
static int
mpc52xx_fec_remove(struct of_device *op)
{
struct net_device *ndev;
struct mpc52xx_fec_priv *priv;
ndev = dev_get_drvdata(&op->dev);
priv = netdev_priv(ndev);
unregister_netdev(ndev);
irq_dispose_mapping(ndev->irq);
bcom_fec_rx_release(priv->rx_dmatsk);
bcom_fec_tx_release(priv->tx_dmatsk);
iounmap(priv->fec);
release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
free_netdev(ndev);
dev_set_drvdata(&op->dev, NULL);
return 0;
}
#ifdef CONFIG_PM
static int mpc52xx_fec_of_suspend(struct of_device *op, pm_message_t state)
{
struct net_device *dev = dev_get_drvdata(&op->dev);
if (netif_running(dev))
mpc52xx_fec_close(dev);
return 0;
}
static int mpc52xx_fec_of_resume(struct of_device *op)
{
struct net_device *dev = dev_get_drvdata(&op->dev);
mpc52xx_fec_hw_init(dev);
mpc52xx_fec_reset_stats(dev);
if (netif_running(dev))
mpc52xx_fec_open(dev);
return 0;
}
#endif
static struct of_device_id mpc52xx_fec_match[] = {
{ .type = "network", .compatible = "fsl,mpc5200b-fec", },
{ .type = "network", .compatible = "fsl,mpc5200-fec", },
{ .type = "network", .compatible = "mpc5200-fec", },
{ }
};
MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
static struct of_platform_driver mpc52xx_fec_driver = {
.owner = THIS_MODULE,
.name = DRIVER_NAME,
.match_table = mpc52xx_fec_match,
.probe = mpc52xx_fec_probe,
.remove = mpc52xx_fec_remove,
#ifdef CONFIG_PM
.suspend = mpc52xx_fec_of_suspend,
.resume = mpc52xx_fec_of_resume,
#endif
};
/* ======================================================================== */
/* Module */
/* ======================================================================== */
static int __init
mpc52xx_fec_init(void)
{
#ifdef CONFIG_FEC_MPC52xx_MDIO
int ret;
ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver);
if (ret) {
printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
return ret;
}
#endif
return of_register_platform_driver(&mpc52xx_fec_driver);
}
static void __exit
mpc52xx_fec_exit(void)
{
of_unregister_platform_driver(&mpc52xx_fec_driver);
#ifdef CONFIG_FEC_MPC52xx_MDIO
of_unregister_platform_driver(&mpc52xx_fec_mdio_driver);
#endif
}
module_init(mpc52xx_fec_init);
module_exit(mpc52xx_fec_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Dale Farnsworth");
MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");
Reference in a new issue View git blame Copy permalink