linux/drivers/net/netx-eth.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

503 lines
13 KiB
C

/*
* drivers/net/netx-eth.c
*
* Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*
* 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
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/platform_device.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/mii.h>
#include <asm/io.h>
#include <mach/hardware.h>
#include <mach/netx-regs.h>
#include <mach/pfifo.h>
#include <mach/xc.h>
#include <mach/eth.h>
/* XC Fifo Offsets */
#define EMPTY_PTR_FIFO(xcno) (0 + ((xcno) << 3)) /* Index of the empty pointer FIFO */
#define IND_FIFO_PORT_HI(xcno) (1 + ((xcno) << 3)) /* Index of the FIFO where received */
/* Data packages are indicated by XC */
#define IND_FIFO_PORT_LO(xcno) (2 + ((xcno) << 3)) /* Index of the FIFO where received */
/* Data packages are indicated by XC */
#define REQ_FIFO_PORT_HI(xcno) (3 + ((xcno) << 3)) /* Index of the FIFO where Data packages */
/* have to be indicated by ARM which */
/* shall be sent */
#define REQ_FIFO_PORT_LO(xcno) (4 + ((xcno) << 3)) /* Index of the FIFO where Data packages */
/* have to be indicated by ARM which shall */
/* be sent */
#define CON_FIFO_PORT_HI(xcno) (5 + ((xcno) << 3)) /* Index of the FIFO where sent Data packages */
/* are confirmed */
#define CON_FIFO_PORT_LO(xcno) (6 + ((xcno) << 3)) /* Index of the FIFO where sent Data */
/* packages are confirmed */
#define PFIFO_MASK(xcno) (0x7f << (xcno*8))
#define FIFO_PTR_FRAMELEN_SHIFT 0
#define FIFO_PTR_FRAMELEN_MASK (0x7ff << 0)
#define FIFO_PTR_FRAMELEN(len) (((len) << 0) & FIFO_PTR_FRAMELEN_MASK)
#define FIFO_PTR_TIMETRIG (1<<11)
#define FIFO_PTR_MULTI_REQ
#define FIFO_PTR_ORIGIN (1<<14)
#define FIFO_PTR_VLAN (1<<15)
#define FIFO_PTR_FRAMENO_SHIFT 16
#define FIFO_PTR_FRAMENO_MASK (0x3f << 16)
#define FIFO_PTR_FRAMENO(no) (((no) << 16) & FIFO_PTR_FRAMENO_MASK)
#define FIFO_PTR_SEGMENT_SHIFT 22
#define FIFO_PTR_SEGMENT_MASK (0xf << 22)
#define FIFO_PTR_SEGMENT(seg) (((seg) & 0xf) << 22)
#define FIFO_PTR_ERROR_SHIFT 28
#define FIFO_PTR_ERROR_MASK (0xf << 28)
#define ISR_LINK_STATUS_CHANGE (1<<4)
#define ISR_IND_LO (1<<3)
#define ISR_CON_LO (1<<2)
#define ISR_IND_HI (1<<1)
#define ISR_CON_HI (1<<0)
#define ETH_MAC_LOCAL_CONFIG 0x1560
#define ETH_MAC_4321 0x1564
#define ETH_MAC_65 0x1568
#define MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT 16
#define MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK (0xf<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT)
#define MAC_TRAFFIC_CLASS_ARRANGEMENT(x) (((x)<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT) & MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK)
#define LOCAL_CONFIG_LINK_STATUS_IRQ_EN (1<<24)
#define LOCAL_CONFIG_CON_LO_IRQ_EN (1<<23)
#define LOCAL_CONFIG_CON_HI_IRQ_EN (1<<22)
#define LOCAL_CONFIG_IND_LO_IRQ_EN (1<<21)
#define LOCAL_CONFIG_IND_HI_IRQ_EN (1<<20)
#define CARDNAME "netx-eth"
/* LSB must be zero */
#define INTERNAL_PHY_ADR 0x1c
struct netx_eth_priv {
void __iomem *sram_base, *xpec_base, *xmac_base;
int id;
struct mii_if_info mii;
u32 msg_enable;
struct xc *xc;
spinlock_t lock;
};
static void netx_eth_set_multicast_list(struct net_device *ndev)
{
/* implement me */
}
static int
netx_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct netx_eth_priv *priv = netdev_priv(ndev);
unsigned char *buf = skb->data;
unsigned int len = skb->len;
spin_lock_irq(&priv->lock);
memcpy_toio(priv->sram_base + 1560, (void *)buf, len);
if (len < 60) {
memset_io(priv->sram_base + 1560 + len, 0, 60 - len);
len = 60;
}
pfifo_push(REQ_FIFO_PORT_LO(priv->id),
FIFO_PTR_SEGMENT(priv->id) |
FIFO_PTR_FRAMENO(1) |
FIFO_PTR_FRAMELEN(len));
ndev->trans_start = jiffies;
ndev->stats.tx_packets++;
ndev->stats.tx_bytes += skb->len;
netif_stop_queue(ndev);
spin_unlock_irq(&priv->lock);
dev_kfree_skb(skb);
return 0;
}
static void netx_eth_receive(struct net_device *ndev)
{
struct netx_eth_priv *priv = netdev_priv(ndev);
unsigned int val, frameno, seg, len;
unsigned char *data;
struct sk_buff *skb;
val = pfifo_pop(IND_FIFO_PORT_LO(priv->id));
frameno = (val & FIFO_PTR_FRAMENO_MASK) >> FIFO_PTR_FRAMENO_SHIFT;
seg = (val & FIFO_PTR_SEGMENT_MASK) >> FIFO_PTR_SEGMENT_SHIFT;
len = (val & FIFO_PTR_FRAMELEN_MASK) >> FIFO_PTR_FRAMELEN_SHIFT;
skb = dev_alloc_skb(len);
if (unlikely(skb == NULL)) {
printk(KERN_NOTICE "%s: Low memory, packet dropped.\n",
ndev->name);
ndev->stats.rx_dropped++;
return;
}
data = skb_put(skb, len);
memcpy_fromio(data, priv->sram_base + frameno * 1560, len);
pfifo_push(EMPTY_PTR_FIFO(priv->id),
FIFO_PTR_SEGMENT(seg) | FIFO_PTR_FRAMENO(frameno));
skb->protocol = eth_type_trans(skb, ndev);
netif_rx(skb);
ndev->stats.rx_packets++;
ndev->stats.rx_bytes += len;
}
static irqreturn_t
netx_eth_interrupt(int irq, void *dev_id)
{
struct net_device *ndev = dev_id;
struct netx_eth_priv *priv = netdev_priv(ndev);
int status;
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
while (status) {
int fill_level;
writel(status, NETX_PFIFO_XPEC_ISR(priv->id));
if ((status & ISR_CON_HI) || (status & ISR_IND_HI))
printk("%s: unexpected status: 0x%08x\n",
__func__, status);
fill_level =
readl(NETX_PFIFO_FILL_LEVEL(IND_FIFO_PORT_LO(priv->id)));
while (fill_level--)
netx_eth_receive(ndev);
if (status & ISR_CON_LO)
netif_wake_queue(ndev);
if (status & ISR_LINK_STATUS_CHANGE)
mii_check_media(&priv->mii, netif_msg_link(priv), 1);
status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
}
spin_unlock_irqrestore(&priv->lock, flags);
return IRQ_HANDLED;
}
static int netx_eth_open(struct net_device *ndev)
{
struct netx_eth_priv *priv = netdev_priv(ndev);
if (request_irq
(ndev->irq, &netx_eth_interrupt, IRQF_SHARED, ndev->name, ndev))
return -EAGAIN;
writel(ndev->dev_addr[0] |
ndev->dev_addr[1]<<8 |
ndev->dev_addr[2]<<16 |
ndev->dev_addr[3]<<24,
priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
writel(ndev->dev_addr[4] |
ndev->dev_addr[5]<<8,
priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_65);
writel(LOCAL_CONFIG_LINK_STATUS_IRQ_EN |
LOCAL_CONFIG_CON_LO_IRQ_EN |
LOCAL_CONFIG_CON_HI_IRQ_EN |
LOCAL_CONFIG_IND_LO_IRQ_EN |
LOCAL_CONFIG_IND_HI_IRQ_EN,
priv->xpec_base + NETX_XPEC_RAM_START_OFS +
ETH_MAC_LOCAL_CONFIG);
mii_check_media(&priv->mii, netif_msg_link(priv), 1);
netif_start_queue(ndev);
return 0;
}
static int netx_eth_close(struct net_device *ndev)
{
struct netx_eth_priv *priv = netdev_priv(ndev);
netif_stop_queue(ndev);
writel(0,
priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_LOCAL_CONFIG);
free_irq(ndev->irq, ndev);
return 0;
}
static void netx_eth_timeout(struct net_device *ndev)
{
struct netx_eth_priv *priv = netdev_priv(ndev);
int i;
printk(KERN_ERR "%s: transmit timed out, resetting\n", ndev->name);
spin_lock_irq(&priv->lock);
xc_reset(priv->xc);
xc_start(priv->xc);
for (i=2; i<=18; i++)
pfifo_push(EMPTY_PTR_FIFO(priv->id),
FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));
spin_unlock_irq(&priv->lock);
netif_wake_queue(ndev);
}
static int
netx_eth_phy_read(struct net_device *ndev, int phy_id, int reg)
{
unsigned int val;
val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
MIIMU_REGADDR(reg) | MIIMU_PHY_NRES;
writel(val, NETX_MIIMU);
while (readl(NETX_MIIMU) & MIIMU_SNRDY);
return readl(NETX_MIIMU) >> 16;
}
static void
netx_eth_phy_write(struct net_device *ndev, int phy_id, int reg, int value)
{
unsigned int val;
val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
MIIMU_REGADDR(reg) | MIIMU_PHY_NRES | MIIMU_OPMODE_WRITE |
MIIMU_DATA(value);
writel(val, NETX_MIIMU);
while (readl(NETX_MIIMU) & MIIMU_SNRDY);
}
static int netx_eth_enable(struct net_device *ndev)
{
struct netx_eth_priv *priv = netdev_priv(ndev);
unsigned int mac4321, mac65;
int running, i;
ether_setup(ndev);
ndev->open = netx_eth_open;
ndev->stop = netx_eth_close;
ndev->hard_start_xmit = netx_eth_hard_start_xmit;
ndev->tx_timeout = netx_eth_timeout;
ndev->watchdog_timeo = msecs_to_jiffies(5000);
ndev->set_multicast_list = netx_eth_set_multicast_list;
priv->msg_enable = NETIF_MSG_LINK;
priv->mii.phy_id_mask = 0x1f;
priv->mii.reg_num_mask = 0x1f;
priv->mii.force_media = 0;
priv->mii.full_duplex = 0;
priv->mii.dev = ndev;
priv->mii.mdio_read = netx_eth_phy_read;
priv->mii.mdio_write = netx_eth_phy_write;
priv->mii.phy_id = INTERNAL_PHY_ADR + priv->id;
running = xc_running(priv->xc);
xc_stop(priv->xc);
/* if the xc engine is already running, assume the bootloader has
* loaded the firmware for us
*/
if (running) {
/* get Node Address from hardware */
mac4321 = readl(priv->xpec_base +
NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
mac65 = readl(priv->xpec_base +
NETX_XPEC_RAM_START_OFS + ETH_MAC_65);
ndev->dev_addr[0] = mac4321 & 0xff;
ndev->dev_addr[1] = (mac4321 >> 8) & 0xff;
ndev->dev_addr[2] = (mac4321 >> 16) & 0xff;
ndev->dev_addr[3] = (mac4321 >> 24) & 0xff;
ndev->dev_addr[4] = mac65 & 0xff;
ndev->dev_addr[5] = (mac65 >> 8) & 0xff;
} else {
if (xc_request_firmware(priv->xc)) {
printk(CARDNAME ": requesting firmware failed\n");
return -ENODEV;
}
}
xc_reset(priv->xc);
xc_start(priv->xc);
if (!is_valid_ether_addr(ndev->dev_addr))
printk("%s: Invalid ethernet MAC address. Please "
"set using ifconfig\n", ndev->name);
for (i=2; i<=18; i++)
pfifo_push(EMPTY_PTR_FIFO(priv->id),
FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));
return register_netdev(ndev);
}
static int netx_eth_drv_probe(struct platform_device *pdev)
{
struct netx_eth_priv *priv;
struct net_device *ndev;
struct netxeth_platform_data *pdata;
int ret;
ndev = alloc_etherdev(sizeof (struct netx_eth_priv));
if (!ndev) {
printk("%s: could not allocate device.\n", CARDNAME);
ret = -ENOMEM;
goto exit;
}
SET_NETDEV_DEV(ndev, &pdev->dev);
platform_set_drvdata(pdev, ndev);
priv = netdev_priv(ndev);
pdata = (struct netxeth_platform_data *)pdev->dev.platform_data;
priv->xc = request_xc(pdata->xcno, &pdev->dev);
if (!priv->xc) {
dev_err(&pdev->dev, "unable to request xc engine\n");
ret = -ENODEV;
goto exit_free_netdev;
}
ndev->irq = priv->xc->irq;
priv->id = pdev->id;
priv->xpec_base = priv->xc->xpec_base;
priv->xmac_base = priv->xc->xmac_base;
priv->sram_base = priv->xc->sram_base;
ret = pfifo_request(PFIFO_MASK(priv->id));
if (ret) {
printk("unable to request PFIFO\n");
goto exit_free_xc;
}
ret = netx_eth_enable(ndev);
if (ret)
goto exit_free_pfifo;
return 0;
exit_free_pfifo:
pfifo_free(PFIFO_MASK(priv->id));
exit_free_xc:
free_xc(priv->xc);
exit_free_netdev:
platform_set_drvdata(pdev, NULL);
free_netdev(ndev);
exit:
return ret;
}
static int netx_eth_drv_remove(struct platform_device *pdev)
{
struct net_device *ndev = dev_get_drvdata(&pdev->dev);
struct netx_eth_priv *priv = netdev_priv(ndev);
platform_set_drvdata(pdev, NULL);
unregister_netdev(ndev);
xc_stop(priv->xc);
free_xc(priv->xc);
free_netdev(ndev);
pfifo_free(PFIFO_MASK(priv->id));
return 0;
}
static int netx_eth_drv_suspend(struct platform_device *pdev, pm_message_t state)
{
dev_err(&pdev->dev, "suspend not implemented\n");
return 0;
}
static int netx_eth_drv_resume(struct platform_device *pdev)
{
dev_err(&pdev->dev, "resume not implemented\n");
return 0;
}
static struct platform_driver netx_eth_driver = {
.probe = netx_eth_drv_probe,
.remove = netx_eth_drv_remove,
.suspend = netx_eth_drv_suspend,
.resume = netx_eth_drv_resume,
.driver = {
.name = CARDNAME,
.owner = THIS_MODULE,
},
};
static int __init netx_eth_init(void)
{
unsigned int phy_control, val;
printk("NetX Ethernet driver\n");
phy_control = PHY_CONTROL_PHY_ADDRESS(INTERNAL_PHY_ADR>>1) |
PHY_CONTROL_PHY1_MODE(PHY_MODE_ALL) |
PHY_CONTROL_PHY1_AUTOMDIX |
PHY_CONTROL_PHY1_EN |
PHY_CONTROL_PHY0_MODE(PHY_MODE_ALL) |
PHY_CONTROL_PHY0_AUTOMDIX |
PHY_CONTROL_PHY0_EN |
PHY_CONTROL_CLK_XLATIN;
val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);
writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);
writel(phy_control | PHY_CONTROL_RESET, NETX_SYSTEM_PHY_CONTROL);
udelay(100);
val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);
writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);
writel(phy_control, NETX_SYSTEM_PHY_CONTROL);
return platform_driver_register(&netx_eth_driver);
}
static void __exit netx_eth_cleanup(void)
{
platform_driver_unregister(&netx_eth_driver);
}
module_init(netx_eth_init);
module_exit(netx_eth_cleanup);
MODULE_AUTHOR("Sascha Hauer, Pengutronix");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" CARDNAME);