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linux-sg2042/drivers/net/netx-eth.c

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/*
* 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/interrupt.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->stats.tx_packets++;
ndev->stats.tx_bytes += skb->len;
netif_stop_queue(ndev);
spin_unlock_irq(&priv->lock);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
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 const struct net_device_ops netx_eth_netdev_ops = {
.ndo_open = netx_eth_open,
.ndo_stop = netx_eth_close,
.ndo_start_xmit = netx_eth_hard_start_xmit,
.ndo_tx_timeout = netx_eth_timeout,
.ndo_set_multicast_list = netx_eth_set_multicast_list,
.ndo_change_mtu = eth_change_mtu,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
};
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->netdev_ops = &netx_eth_netdev_ops;
ndev->watchdog_timeo = msecs_to_jiffies(5000);
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;
spin_lock_init(&priv->lock);
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);
MODULE_FIRMWARE("xc0.bin");
MODULE_FIRMWARE("xc1.bin");
MODULE_FIRMWARE("xc2.bin");
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