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MIPS: Lantiq: Add ethernet driver 

This patch adds the driver for the ETOP Packet Processing Engine (PPE32)
found inside the XWAY family of Lantiq MIPS SoCs. This driver makes 100MBit
ethernet work. Support for all 8 dma channels, gbit and the embedded switch
found on the ar9/vr9 still needs to be implemented.

Signed-off-by: John Crispin <blogic@openwrt.org>
Signed-off-by: Ralph Hempel <ralph.hempel@lantiq.com>
Cc: linux-mips@linux-mips.org
Cc: netdev@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/2357/
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
John Crispin 2011-05-06 00:10:01 +02:00 committed by Ralf Baechle
parent dfec1a827d
commit 504d4721ee
7 changed files with 846 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/mips/include/asm/mach-lantiq/lantiq_platform.h
View File

@ -10,6 +10,7 @@
#define _LANTIQ_PLATFORM_H__
#include <linux/mtd/partitions.h>
#include <linux/socket.h>
/* struct used to pass info to the pci core */
enum {
@ -43,4 +44,10 @@ struct ltq_pci_data {
int irq[16];
};
/* struct used to pass info to network drivers */
struct ltq_eth_data {
struct sockaddr mac;
int mii_mode;
};
#endif

4
arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
View File

@ -82,8 +82,8 @@
#define PMU_SWITCH 0x10000000
/* ETOP - ethernet */
#define LTQ_PPE32_BASE_ADDR 0xBE180000
#define LTQ_PPE32_SIZE 0x40000
#define LTQ_ETOP_BASE_ADDR 0x1E180000
#define LTQ_ETOP_SIZE 0x40000
/* DMA */
#define LTQ_DMA_BASE_ADDR 0x1E104100

23
arch/mips/lantiq/xway/devices.c
View File

@ -96,3 +96,26 @@ void __init ltq_register_ase_asc(void)
platform_device_register_simple("ltq_asc", 0,
ltq_ase_asc_resources, ARRAY_SIZE(ltq_ase_asc_resources));
}
/* ethernet */
static struct resource ltq_etop_resources = {
.name = "etop",
.start = LTQ_ETOP_BASE_ADDR,
.end = LTQ_ETOP_BASE_ADDR + LTQ_ETOP_SIZE - 1,
.flags = IORESOURCE_MEM,
};
static struct platform_device ltq_etop = {
.name = "ltq_etop",
.resource = &ltq_etop_resources,
.num_resources = 1,
};
void __init
ltq_register_etop(struct ltq_eth_data *eth)
{
if (eth) {
ltq_etop.dev.platform_data = eth;
platform_device_register(&ltq_etop);
}
}

1
arch/mips/lantiq/xway/devices.h
View File

@ -15,5 +15,6 @@
extern void ltq_register_gpio(void);
extern void ltq_register_gpio_stp(void);
extern void ltq_register_ase_asc(void);
extern void ltq_register_etop(struct ltq_eth_data *eth);
#endif

7
drivers/net/Kconfig
View File

@ -2017,6 +2017,13 @@ config FTMAC100
from Faraday. It is used on Faraday A320, Andes AG101 and some
other ARM/NDS32 SoC's.
config LANTIQ_ETOP
tristate "Lantiq SoC ETOP driver"
depends on SOC_TYPE_XWAY
help
Support for the MII0 inside the Lantiq SoC
source "drivers/net/fs_enet/Kconfig"
source "drivers/net/octeon/Kconfig"

1
drivers/net/Makefile
View File

@ -259,6 +259,7 @@ obj-$(CONFIG_MLX4_CORE) += mlx4/
obj-$(CONFIG_ENC28J60) += enc28j60.o
obj-$(CONFIG_ETHOC) += ethoc.o
obj-$(CONFIG_GRETH) += greth.o
obj-$(CONFIG_LANTIQ_ETOP) += lantiq_etop.o
obj-$(CONFIG_XTENSA_XT2000_SONIC) += xtsonic.o

805
drivers/net/lantiq_etop.c Normal file
View File

@ -0,0 +1,805 @@
/*
* This program is free software; you can redistribute 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 that 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.
*
* Copyright (C) 2011 John Crispin <blogic@openwrt.org>
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/uaccess.h>
#include <linux/in.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/phy.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/skbuff.h>
#include <linux/mm.h>
#include <linux/platform_device.h>
#include <linux/ethtool.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <asm/checksum.h>
#include <lantiq_soc.h>
#include <xway_dma.h>
#include <lantiq_platform.h>
#define LTQ_ETOP_MDIO 0x11804
#define MDIO_REQUEST 0x80000000
#define MDIO_READ 0x40000000
#define MDIO_ADDR_MASK 0x1f
#define MDIO_ADDR_OFFSET 0x15
#define MDIO_REG_MASK 0x1f
#define MDIO_REG_OFFSET 0x10
#define MDIO_VAL_MASK 0xffff
#define PPE32_CGEN 0x800
#define LQ_PPE32_ENET_MAC_CFG 0x1840
#define LTQ_ETOP_ENETS0 0x11850
#define LTQ_ETOP_MAC_DA0 0x1186C
#define LTQ_ETOP_MAC_DA1 0x11870
#define LTQ_ETOP_CFG 0x16020
#define LTQ_ETOP_IGPLEN 0x16080
#define MAX_DMA_CHAN 0x8
#define MAX_DMA_CRC_LEN 0x4
#define MAX_DMA_DATA_LEN 0x600
#define ETOP_FTCU BIT(28)
#define ETOP_MII_MASK 0xf
#define ETOP_MII_NORMAL 0xd
#define ETOP_MII_REVERSE 0xe
#define ETOP_PLEN_UNDER 0x40
#define ETOP_CGEN 0x800
/* use 2 static channels for TX/RX */
#define LTQ_ETOP_TX_CHANNEL 1
#define LTQ_ETOP_RX_CHANNEL 6
#define IS_TX(x) (x == LTQ_ETOP_TX_CHANNEL)
#define IS_RX(x) (x == LTQ_ETOP_RX_CHANNEL)
#define ltq_etop_r32(x) ltq_r32(ltq_etop_membase + (x))
#define ltq_etop_w32(x, y) ltq_w32(x, ltq_etop_membase + (y))
#define ltq_etop_w32_mask(x, y, z) \
ltq_w32_mask(x, y, ltq_etop_membase + (z))
#define DRV_VERSION "1.0"
static void __iomem *ltq_etop_membase;
struct ltq_etop_chan {
int idx;
int tx_free;
struct net_device *netdev;
struct napi_struct napi;
struct ltq_dma_channel dma;
struct sk_buff *skb[LTQ_DESC_NUM];
};
struct ltq_etop_priv {
struct net_device *netdev;
struct ltq_eth_data *pldata;
struct resource *res;
struct mii_bus *mii_bus;
struct phy_device *phydev;
struct ltq_etop_chan ch[MAX_DMA_CHAN];
int tx_free[MAX_DMA_CHAN >> 1];
spinlock_t lock;
};
static int
ltq_etop_alloc_skb(struct ltq_etop_chan *ch)
{
ch->skb[ch->dma.desc] = dev_alloc_skb(MAX_DMA_DATA_LEN);
if (!ch->skb[ch->dma.desc])
return -ENOMEM;
ch->dma.desc_base[ch->dma.desc].addr = dma_map_single(NULL,
ch->skb[ch->dma.desc]->data, MAX_DMA_DATA_LEN,
DMA_FROM_DEVICE);
ch->dma.desc_base[ch->dma.desc].addr =
CPHYSADDR(ch->skb[ch->dma.desc]->data);
ch->dma.desc_base[ch->dma.desc].ctl =
LTQ_DMA_OWN | LTQ_DMA_RX_OFFSET(NET_IP_ALIGN) |
MAX_DMA_DATA_LEN;
skb_reserve(ch->skb[ch->dma.desc], NET_IP_ALIGN);
return 0;
}
static void
ltq_etop_hw_receive(struct ltq_etop_chan *ch)
{
struct ltq_etop_priv *priv = netdev_priv(ch->netdev);
struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];
struct sk_buff *skb = ch->skb[ch->dma.desc];
int len = (desc->ctl & LTQ_DMA_SIZE_MASK) - MAX_DMA_CRC_LEN;
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
if (ltq_etop_alloc_skb(ch)) {
netdev_err(ch->netdev,
"failed to allocate new rx buffer, stopping DMA\n");
ltq_dma_close(&ch->dma);
}
ch->dma.desc++;
ch->dma.desc %= LTQ_DESC_NUM;
spin_unlock_irqrestore(&priv->lock, flags);
skb_put(skb, len);
skb->dev = ch->netdev;
skb->protocol = eth_type_trans(skb, ch->netdev);
netif_receive_skb(skb);
}
static int
ltq_etop_poll_rx(struct napi_struct *napi, int budget)
{
struct ltq_etop_chan *ch = container_of(napi,
struct ltq_etop_chan, napi);
int rx = 0;
int complete = 0;
while ((rx < budget) && !complete) {
struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];
if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) == LTQ_DMA_C) {
ltq_etop_hw_receive(ch);
rx++;
} else {
complete = 1;
}
}
if (complete || !rx) {
napi_complete(&ch->napi);
ltq_dma_ack_irq(&ch->dma);
}
return rx;
}
static int
ltq_etop_poll_tx(struct napi_struct *napi, int budget)
{
struct ltq_etop_chan *ch =
container_of(napi, struct ltq_etop_chan, napi);
struct ltq_etop_priv *priv = netdev_priv(ch->netdev);
struct netdev_queue *txq =
netdev_get_tx_queue(ch->netdev, ch->idx >> 1);
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
while ((ch->dma.desc_base[ch->tx_free].ctl &
(LTQ_DMA_OWN | LTQ_DMA_C)) == LTQ_DMA_C) {
dev_kfree_skb_any(ch->skb[ch->tx_free]);
ch->skb[ch->tx_free] = NULL;
memset(&ch->dma.desc_base[ch->tx_free], 0,
sizeof(struct ltq_dma_desc));
ch->tx_free++;
ch->tx_free %= LTQ_DESC_NUM;
}
spin_unlock_irqrestore(&priv->lock, flags);
if (netif_tx_queue_stopped(txq))
netif_tx_start_queue(txq);
napi_complete(&ch->napi);
ltq_dma_ack_irq(&ch->dma);
return 1;
}
static irqreturn_t
ltq_etop_dma_irq(int irq, void *_priv)
{
struct ltq_etop_priv *priv = _priv;
int ch = irq - LTQ_DMA_CH0_INT;
napi_schedule(&priv->ch[ch].napi);
return IRQ_HANDLED;
}
static void
ltq_etop_free_channel(struct net_device *dev, struct ltq_etop_chan *ch)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
ltq_dma_free(&ch->dma);
if (ch->dma.irq)
free_irq(ch->dma.irq, priv);
if (IS_RX(ch->idx)) {
int desc;
for (desc = 0; desc < LTQ_DESC_NUM; desc++)
dev_kfree_skb_any(ch->skb[ch->dma.desc]);
}
}
static void
ltq_etop_hw_exit(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
int i;
ltq_pmu_disable(PMU_PPE);
for (i = 0; i < MAX_DMA_CHAN; i++)
if (IS_TX(i) || IS_RX(i))
ltq_etop_free_channel(dev, &priv->ch[i]);
}
static int
ltq_etop_hw_init(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
int i;
ltq_pmu_enable(PMU_PPE);
switch (priv->pldata->mii_mode) {
case PHY_INTERFACE_MODE_RMII:
ltq_etop_w32_mask(ETOP_MII_MASK,
ETOP_MII_REVERSE, LTQ_ETOP_CFG);
break;
case PHY_INTERFACE_MODE_MII:
ltq_etop_w32_mask(ETOP_MII_MASK,
ETOP_MII_NORMAL, LTQ_ETOP_CFG);
break;
default:
netdev_err(dev, "unknown mii mode %d\n",
priv->pldata->mii_mode);
return -ENOTSUPP;
}
/* enable crc generation */
ltq_etop_w32(PPE32_CGEN, LQ_PPE32_ENET_MAC_CFG);
ltq_dma_init_port(DMA_PORT_ETOP);
for (i = 0; i < MAX_DMA_CHAN; i++) {
int irq = LTQ_DMA_CH0_INT + i;
struct ltq_etop_chan *ch = &priv->ch[i];
ch->idx = ch->dma.nr = i;
if (IS_TX(i)) {
ltq_dma_alloc_tx(&ch->dma);
request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
"etop_tx", priv);
} else if (IS_RX(i)) {
ltq_dma_alloc_rx(&ch->dma);
for (ch->dma.desc = 0; ch->dma.desc < LTQ_DESC_NUM;
ch->dma.desc++)
if (ltq_etop_alloc_skb(ch))
return -ENOMEM;
ch->dma.desc = 0;
request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
"etop_rx", priv);
}
ch->dma.irq = irq;
}
return 0;
}
static void
ltq_etop_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
strcpy(info->driver, "Lantiq ETOP");
strcpy(info->bus_info, "internal");
strcpy(info->version, DRV_VERSION);
}
static int
ltq_etop_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
return phy_ethtool_gset(priv->phydev, cmd);
}
static int
ltq_etop_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
return phy_ethtool_sset(priv->phydev, cmd);
}
static int
ltq_etop_nway_reset(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
return phy_start_aneg(priv->phydev);
}
static const struct ethtool_ops ltq_etop_ethtool_ops = {
.get_drvinfo = ltq_etop_get_drvinfo,
.get_settings = ltq_etop_get_settings,
.set_settings = ltq_etop_set_settings,
.nway_reset = ltq_etop_nway_reset,
};
static int
ltq_etop_mdio_wr(struct mii_bus *bus, int phy_addr, int phy_reg, u16 phy_data)
{
u32 val = MDIO_REQUEST |
((phy_addr & MDIO_ADDR_MASK) << MDIO_ADDR_OFFSET) |
((phy_reg & MDIO_REG_MASK) << MDIO_REG_OFFSET) |
phy_data;
while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST)
;
ltq_etop_w32(val, LTQ_ETOP_MDIO);
return 0;
}
static int
ltq_etop_mdio_rd(struct mii_bus *bus, int phy_addr, int phy_reg)
{
u32 val = MDIO_REQUEST | MDIO_READ |
((phy_addr & MDIO_ADDR_MASK) << MDIO_ADDR_OFFSET) |
((phy_reg & MDIO_REG_MASK) << MDIO_REG_OFFSET);
while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST)
;
ltq_etop_w32(val, LTQ_ETOP_MDIO);
while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST)
;
val = ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_VAL_MASK;
return val;
}
static void
ltq_etop_mdio_link(struct net_device *dev)
{
/* nothing to do */
}
static int
ltq_etop_mdio_probe(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
struct phy_device *phydev = NULL;
int phy_addr;
for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
if (priv->mii_bus->phy_map[phy_addr]) {
phydev = priv->mii_bus->phy_map[phy_addr];
break;
}
}
if (!phydev) {
netdev_err(dev, "no PHY found\n");
return -ENODEV;
}
phydev = phy_connect(dev, dev_name(&phydev->dev), &ltq_etop_mdio_link,
0, priv->pldata->mii_mode);
if (IS_ERR(phydev)) {
netdev_err(dev, "Could not attach to PHY\n");
return PTR_ERR(phydev);
}
phydev->supported &= (SUPPORTED_10baseT_Half
| SUPPORTED_10baseT_Full
| SUPPORTED_100baseT_Half
| SUPPORTED_100baseT_Full
| SUPPORTED_Autoneg
| SUPPORTED_MII
| SUPPORTED_TP);
phydev->advertising = phydev->supported;
priv->phydev = phydev;
pr_info("%s: attached PHY [%s] (phy_addr=%s, irq=%d)\n",
dev->name, phydev->drv->name,
dev_name(&phydev->dev), phydev->irq);
return 0;
}
static int
ltq_etop_mdio_init(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
int i;
int err;
priv->mii_bus = mdiobus_alloc();
if (!priv->mii_bus) {
netdev_err(dev, "failed to allocate mii bus\n");
err = -ENOMEM;
goto err_out;
}
priv->mii_bus->priv = dev;
priv->mii_bus->read = ltq_etop_mdio_rd;
priv->mii_bus->write = ltq_etop_mdio_wr;
priv->mii_bus->name = "ltq_mii";
snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%x", 0);
priv->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
if (!priv->mii_bus->irq) {
err = -ENOMEM;
goto err_out_free_mdiobus;
}
for (i = 0; i < PHY_MAX_ADDR; ++i)
priv->mii_bus->irq[i] = PHY_POLL;
if (mdiobus_register(priv->mii_bus)) {
err = -ENXIO;
goto err_out_free_mdio_irq;
}
if (ltq_etop_mdio_probe(dev)) {
err = -ENXIO;
goto err_out_unregister_bus;
}
return 0;
err_out_unregister_bus:
mdiobus_unregister(priv->mii_bus);
err_out_free_mdio_irq:
kfree(priv->mii_bus->irq);
err_out_free_mdiobus:
mdiobus_free(priv->mii_bus);
err_out:
return err;
}
static void
ltq_etop_mdio_cleanup(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
phy_disconnect(priv->phydev);
mdiobus_unregister(priv->mii_bus);
kfree(priv->mii_bus->irq);
mdiobus_free(priv->mii_bus);
}
static int
ltq_etop_open(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
int i;
for (i = 0; i < MAX_DMA_CHAN; i++) {
struct ltq_etop_chan *ch = &priv->ch[i];
if (!IS_TX(i) && (!IS_RX(i)))
continue;
ltq_dma_open(&ch->dma);
napi_enable(&ch->napi);
}
phy_start(priv->phydev);
netif_tx_start_all_queues(dev);
return 0;
}
static int
ltq_etop_stop(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
int i;
netif_tx_stop_all_queues(dev);
phy_stop(priv->phydev);
for (i = 0; i < MAX_DMA_CHAN; i++) {
struct ltq_etop_chan *ch = &priv->ch[i];
if (!IS_RX(i) && !IS_TX(i))
continue;
napi_disable(&ch->napi);
ltq_dma_close(&ch->dma);
}
return 0;
}
static int
ltq_etop_tx(struct sk_buff *skb, struct net_device *dev)
{
int queue = skb_get_queue_mapping(skb);
struct netdev_queue *txq = netdev_get_tx_queue(dev, queue);
struct ltq_etop_priv *priv = netdev_priv(dev);
struct ltq_etop_chan *ch = &priv->ch[(queue << 1) | 1];
struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];
int len;
unsigned long flags;
u32 byte_offset;
len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) || ch->skb[ch->dma.desc]) {
dev_kfree_skb_any(skb);
netdev_err(dev, "tx ring full\n");
netif_tx_stop_queue(txq);
return NETDEV_TX_BUSY;
}
/* dma needs to start on a 16 byte aligned address */
byte_offset = CPHYSADDR(skb->data) % 16;
ch->skb[ch->dma.desc] = skb;
dev->trans_start = jiffies;
spin_lock_irqsave(&priv->lock, flags);
desc->addr = ((unsigned int) dma_map_single(NULL, skb->data, len,
DMA_TO_DEVICE)) - byte_offset;
wmb();
desc->ctl = LTQ_DMA_OWN | LTQ_DMA_SOP | LTQ_DMA_EOP |
LTQ_DMA_TX_OFFSET(byte_offset) | (len & LTQ_DMA_SIZE_MASK);
ch->dma.desc++;
ch->dma.desc %= LTQ_DESC_NUM;
spin_unlock_irqrestore(&priv->lock, flags);
if (ch->dma.desc_base[ch->dma.desc].ctl & LTQ_DMA_OWN)
netif_tx_stop_queue(txq);
return NETDEV_TX_OK;
}
static int
ltq_etop_change_mtu(struct net_device *dev, int new_mtu)
{
int ret = eth_change_mtu(dev, new_mtu);
if (!ret) {
struct ltq_etop_priv *priv = netdev_priv(dev);
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
ltq_etop_w32((ETOP_PLEN_UNDER << 16) | new_mtu,
LTQ_ETOP_IGPLEN);
spin_unlock_irqrestore(&priv->lock, flags);
}
return ret;
}
static int
ltq_etop_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
/* TODO: mii-toll reports "No MII transceiver present!." ?!*/
return phy_mii_ioctl(priv->phydev, rq, cmd);
}
static int
ltq_etop_set_mac_address(struct net_device *dev, void *p)
{
int ret = eth_mac_addr(dev, p);
if (!ret) {
struct ltq_etop_priv *priv = netdev_priv(dev);
unsigned long flags;
/* store the mac for the unicast filter */
spin_lock_irqsave(&priv->lock, flags);
ltq_etop_w32(*((u32 *)dev->dev_addr), LTQ_ETOP_MAC_DA0);
ltq_etop_w32(*((u16 *)&dev->dev_addr[4]) << 16,
LTQ_ETOP_MAC_DA1);
spin_unlock_irqrestore(&priv->lock, flags);
}
return ret;
}
static void
ltq_etop_set_multicast_list(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
unsigned long flags;
/* ensure that the unicast filter is not enabled in promiscious mode */
spin_lock_irqsave(&priv->lock, flags);
if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI))
ltq_etop_w32_mask(ETOP_FTCU, 0, LTQ_ETOP_ENETS0);
else
ltq_etop_w32_mask(0, ETOP_FTCU, LTQ_ETOP_ENETS0);
spin_unlock_irqrestore(&priv->lock, flags);
}
static u16
ltq_etop_select_queue(struct net_device *dev, struct sk_buff *skb)
{
/* we are currently only using the first queue */
return 0;
}
static int
ltq_etop_init(struct net_device *dev)
{
struct ltq_etop_priv *priv = netdev_priv(dev);
struct sockaddr mac;
int err;
ether_setup(dev);
dev->watchdog_timeo = 10 * HZ;
err = ltq_etop_hw_init(dev);
if (err)
goto err_hw;
ltq_etop_change_mtu(dev, 1500);
memcpy(&mac, &priv->pldata->mac, sizeof(struct sockaddr));
if (!is_valid_ether_addr(mac.sa_data)) {
pr_warn("etop: invalid MAC, using random\n");
random_ether_addr(mac.sa_data);
}
err = ltq_etop_set_mac_address(dev, &mac);
if (err)
goto err_netdev;
ltq_etop_set_multicast_list(dev);
err = ltq_etop_mdio_init(dev);
if (err)
goto err_netdev;
return 0;
err_netdev:
unregister_netdev(dev);
free_netdev(dev);
err_hw:
ltq_etop_hw_exit(dev);
return err;
}
static void
ltq_etop_tx_timeout(struct net_device *dev)
{
int err;
ltq_etop_hw_exit(dev);
err = ltq_etop_hw_init(dev);
if (err)
goto err_hw;
dev->trans_start = jiffies;
netif_wake_queue(dev);
return;
err_hw:
ltq_etop_hw_exit(dev);
netdev_err(dev, "failed to restart etop after TX timeout\n");
}
static const struct net_device_ops ltq_eth_netdev_ops = {
.ndo_open = ltq_etop_open,
.ndo_stop = ltq_etop_stop,
.ndo_start_xmit = ltq_etop_tx,
.ndo_change_mtu = ltq_etop_change_mtu,
.ndo_do_ioctl = ltq_etop_ioctl,
.ndo_set_mac_address = ltq_etop_set_mac_address,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_multicast_list = ltq_etop_set_multicast_list,
.ndo_select_queue = ltq_etop_select_queue,
.ndo_init = ltq_etop_init,
.ndo_tx_timeout = ltq_etop_tx_timeout,
};
static int __init
ltq_etop_probe(struct platform_device *pdev)
{
struct net_device *dev;
struct ltq_etop_priv *priv;
struct resource *res;
int err;
int i;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "failed to get etop resource\n");
err = -ENOENT;
goto err_out;
}
res = devm_request_mem_region(&pdev->dev, res->start,
resource_size(res), dev_name(&pdev->dev));
if (!res) {
dev_err(&pdev->dev, "failed to request etop resource\n");
err = -EBUSY;
goto err_out;
}
ltq_etop_membase = devm_ioremap_nocache(&pdev->dev,
res->start, resource_size(res));
if (!ltq_etop_membase) {
dev_err(&pdev->dev, "failed to remap etop engine %d\n",
pdev->id);
err = -ENOMEM;
goto err_out;
}
dev = alloc_etherdev_mq(sizeof(struct ltq_etop_priv), 4);
strcpy(dev->name, "eth%d");
dev->netdev_ops = &ltq_eth_netdev_ops;
dev->ethtool_ops = &ltq_etop_ethtool_ops;
priv = netdev_priv(dev);
priv->res = res;
priv->pldata = dev_get_platdata(&pdev->dev);
priv->netdev = dev;
spin_lock_init(&priv->lock);
for (i = 0; i < MAX_DMA_CHAN; i++) {
if (IS_TX(i))
netif_napi_add(dev, &priv->ch[i].napi,
ltq_etop_poll_tx, 8);
else if (IS_RX(i))
netif_napi_add(dev, &priv->ch[i].napi,
ltq_etop_poll_rx, 32);
priv->ch[i].netdev = dev;
}
err = register_netdev(dev);
if (err)
goto err_free;
platform_set_drvdata(pdev, dev);
return 0;
err_free:
kfree(dev);
err_out:
return err;
}
static int __devexit
ltq_etop_remove(struct platform_device *pdev)
{
struct net_device *dev = platform_get_drvdata(pdev);
if (dev) {
netif_tx_stop_all_queues(dev);
ltq_etop_hw_exit(dev);
ltq_etop_mdio_cleanup(dev);
unregister_netdev(dev);
}
return 0;
}
static struct platform_driver ltq_mii_driver = {
.remove = __devexit_p(ltq_etop_remove),
.driver = {
.name = "ltq_etop",
.owner = THIS_MODULE,
},
};
int __init
init_ltq_etop(void)
{
int ret = platform_driver_probe(&ltq_mii_driver, ltq_etop_probe);
if (ret)
pr_err("ltq_etop: Error registering platfom driver!");
return ret;
}
static void __exit
exit_ltq_etop(void)
{
platform_driver_unregister(&ltq_mii_driver);
}
module_init(init_ltq_etop);
module_exit(exit_ltq_etop);
MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
MODULE_DESCRIPTION("Lantiq SoC ETOP");
MODULE_LICENSE("GPL");