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|
/*
* drivers/net/ethernet/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, see <http://www.gnu.org/licenses/>.
*/
#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 <linux/platform_data/eth-netx.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 = netdev_alloc_skb(ndev, len);
if (unlikely(skb == NULL)) {
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,
|