36c04a61f5
Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
516 lines
14 KiB
C
516 lines
14 KiB
C
/*
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* drivers/net/netx-eth.c
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*
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* Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/platform_device.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/mii.h>
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#include <asm/io.h>
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#include <mach/hardware.h>
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#include <mach/netx-regs.h>
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#include <mach/pfifo.h>
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#include <mach/xc.h>
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#include <mach/eth.h>
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/* XC Fifo Offsets */
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#define EMPTY_PTR_FIFO(xcno) (0 + ((xcno) << 3)) /* Index of the empty pointer FIFO */
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#define IND_FIFO_PORT_HI(xcno) (1 + ((xcno) << 3)) /* Index of the FIFO where received */
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/* Data packages are indicated by XC */
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#define IND_FIFO_PORT_LO(xcno) (2 + ((xcno) << 3)) /* Index of the FIFO where received */
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/* Data packages are indicated by XC */
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#define REQ_FIFO_PORT_HI(xcno) (3 + ((xcno) << 3)) /* Index of the FIFO where Data packages */
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/* have to be indicated by ARM which */
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/* shall be sent */
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#define REQ_FIFO_PORT_LO(xcno) (4 + ((xcno) << 3)) /* Index of the FIFO where Data packages */
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/* have to be indicated by ARM which shall */
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/* be sent */
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#define CON_FIFO_PORT_HI(xcno) (5 + ((xcno) << 3)) /* Index of the FIFO where sent Data packages */
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/* are confirmed */
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#define CON_FIFO_PORT_LO(xcno) (6 + ((xcno) << 3)) /* Index of the FIFO where sent Data */
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/* packages are confirmed */
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#define PFIFO_MASK(xcno) (0x7f << (xcno*8))
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#define FIFO_PTR_FRAMELEN_SHIFT 0
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#define FIFO_PTR_FRAMELEN_MASK (0x7ff << 0)
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#define FIFO_PTR_FRAMELEN(len) (((len) << 0) & FIFO_PTR_FRAMELEN_MASK)
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#define FIFO_PTR_TIMETRIG (1<<11)
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#define FIFO_PTR_MULTI_REQ
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#define FIFO_PTR_ORIGIN (1<<14)
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#define FIFO_PTR_VLAN (1<<15)
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#define FIFO_PTR_FRAMENO_SHIFT 16
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#define FIFO_PTR_FRAMENO_MASK (0x3f << 16)
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#define FIFO_PTR_FRAMENO(no) (((no) << 16) & FIFO_PTR_FRAMENO_MASK)
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#define FIFO_PTR_SEGMENT_SHIFT 22
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#define FIFO_PTR_SEGMENT_MASK (0xf << 22)
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#define FIFO_PTR_SEGMENT(seg) (((seg) & 0xf) << 22)
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#define FIFO_PTR_ERROR_SHIFT 28
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#define FIFO_PTR_ERROR_MASK (0xf << 28)
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#define ISR_LINK_STATUS_CHANGE (1<<4)
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#define ISR_IND_LO (1<<3)
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#define ISR_CON_LO (1<<2)
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#define ISR_IND_HI (1<<1)
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#define ISR_CON_HI (1<<0)
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#define ETH_MAC_LOCAL_CONFIG 0x1560
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#define ETH_MAC_4321 0x1564
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#define ETH_MAC_65 0x1568
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#define MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT 16
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#define MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK (0xf<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT)
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#define MAC_TRAFFIC_CLASS_ARRANGEMENT(x) (((x)<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT) & MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK)
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#define LOCAL_CONFIG_LINK_STATUS_IRQ_EN (1<<24)
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#define LOCAL_CONFIG_CON_LO_IRQ_EN (1<<23)
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#define LOCAL_CONFIG_CON_HI_IRQ_EN (1<<22)
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#define LOCAL_CONFIG_IND_LO_IRQ_EN (1<<21)
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#define LOCAL_CONFIG_IND_HI_IRQ_EN (1<<20)
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#define CARDNAME "netx-eth"
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/* LSB must be zero */
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#define INTERNAL_PHY_ADR 0x1c
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struct netx_eth_priv {
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void __iomem *sram_base, *xpec_base, *xmac_base;
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int id;
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struct mii_if_info mii;
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u32 msg_enable;
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struct xc *xc;
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spinlock_t lock;
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};
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static void netx_eth_set_multicast_list(struct net_device *ndev)
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{
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/* implement me */
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}
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static int
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netx_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
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{
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struct netx_eth_priv *priv = netdev_priv(ndev);
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unsigned char *buf = skb->data;
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unsigned int len = skb->len;
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spin_lock_irq(&priv->lock);
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memcpy_toio(priv->sram_base + 1560, (void *)buf, len);
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if (len < 60) {
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memset_io(priv->sram_base + 1560 + len, 0, 60 - len);
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len = 60;
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}
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pfifo_push(REQ_FIFO_PORT_LO(priv->id),
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FIFO_PTR_SEGMENT(priv->id) |
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FIFO_PTR_FRAMENO(1) |
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FIFO_PTR_FRAMELEN(len));
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ndev->trans_start = jiffies;
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ndev->stats.tx_packets++;
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ndev->stats.tx_bytes += skb->len;
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netif_stop_queue(ndev);
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spin_unlock_irq(&priv->lock);
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dev_kfree_skb(skb);
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return NETDEV_TX_OK;
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}
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static void netx_eth_receive(struct net_device *ndev)
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{
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struct netx_eth_priv *priv = netdev_priv(ndev);
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unsigned int val, frameno, seg, len;
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unsigned char *data;
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struct sk_buff *skb;
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val = pfifo_pop(IND_FIFO_PORT_LO(priv->id));
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frameno = (val & FIFO_PTR_FRAMENO_MASK) >> FIFO_PTR_FRAMENO_SHIFT;
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seg = (val & FIFO_PTR_SEGMENT_MASK) >> FIFO_PTR_SEGMENT_SHIFT;
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len = (val & FIFO_PTR_FRAMELEN_MASK) >> FIFO_PTR_FRAMELEN_SHIFT;
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skb = dev_alloc_skb(len);
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if (unlikely(skb == NULL)) {
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printk(KERN_NOTICE "%s: Low memory, packet dropped.\n",
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ndev->name);
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ndev->stats.rx_dropped++;
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return;
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}
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data = skb_put(skb, len);
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memcpy_fromio(data, priv->sram_base + frameno * 1560, len);
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pfifo_push(EMPTY_PTR_FIFO(priv->id),
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FIFO_PTR_SEGMENT(seg) | FIFO_PTR_FRAMENO(frameno));
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skb->protocol = eth_type_trans(skb, ndev);
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netif_rx(skb);
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ndev->stats.rx_packets++;
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ndev->stats.rx_bytes += len;
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}
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static irqreturn_t
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netx_eth_interrupt(int irq, void *dev_id)
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{
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struct net_device *ndev = dev_id;
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struct netx_eth_priv *priv = netdev_priv(ndev);
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int status;
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unsigned long flags;
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spin_lock_irqsave(&priv->lock, flags);
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status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
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while (status) {
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int fill_level;
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writel(status, NETX_PFIFO_XPEC_ISR(priv->id));
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if ((status & ISR_CON_HI) || (status & ISR_IND_HI))
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printk("%s: unexpected status: 0x%08x\n",
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__func__, status);
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fill_level =
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readl(NETX_PFIFO_FILL_LEVEL(IND_FIFO_PORT_LO(priv->id)));
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while (fill_level--)
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netx_eth_receive(ndev);
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if (status & ISR_CON_LO)
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netif_wake_queue(ndev);
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if (status & ISR_LINK_STATUS_CHANGE)
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mii_check_media(&priv->mii, netif_msg_link(priv), 1);
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status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
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}
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spin_unlock_irqrestore(&priv->lock, flags);
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return IRQ_HANDLED;
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}
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static int netx_eth_open(struct net_device *ndev)
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{
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struct netx_eth_priv *priv = netdev_priv(ndev);
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if (request_irq
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(ndev->irq, &netx_eth_interrupt, IRQF_SHARED, ndev->name, ndev))
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return -EAGAIN;
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writel(ndev->dev_addr[0] |
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ndev->dev_addr[1]<<8 |
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ndev->dev_addr[2]<<16 |
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ndev->dev_addr[3]<<24,
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priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
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writel(ndev->dev_addr[4] |
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ndev->dev_addr[5]<<8,
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priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_65);
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writel(LOCAL_CONFIG_LINK_STATUS_IRQ_EN |
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LOCAL_CONFIG_CON_LO_IRQ_EN |
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LOCAL_CONFIG_CON_HI_IRQ_EN |
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LOCAL_CONFIG_IND_LO_IRQ_EN |
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LOCAL_CONFIG_IND_HI_IRQ_EN,
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priv->xpec_base + NETX_XPEC_RAM_START_OFS +
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ETH_MAC_LOCAL_CONFIG);
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mii_check_media(&priv->mii, netif_msg_link(priv), 1);
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netif_start_queue(ndev);
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return 0;
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}
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static int netx_eth_close(struct net_device *ndev)
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{
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struct netx_eth_priv *priv = netdev_priv(ndev);
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netif_stop_queue(ndev);
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writel(0,
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priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_LOCAL_CONFIG);
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free_irq(ndev->irq, ndev);
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return 0;
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}
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static void netx_eth_timeout(struct net_device *ndev)
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{
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struct netx_eth_priv *priv = netdev_priv(ndev);
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int i;
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printk(KERN_ERR "%s: transmit timed out, resetting\n", ndev->name);
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spin_lock_irq(&priv->lock);
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xc_reset(priv->xc);
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xc_start(priv->xc);
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for (i=2; i<=18; i++)
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pfifo_push(EMPTY_PTR_FIFO(priv->id),
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FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));
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spin_unlock_irq(&priv->lock);
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netif_wake_queue(ndev);
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}
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static int
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netx_eth_phy_read(struct net_device *ndev, int phy_id, int reg)
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{
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unsigned int val;
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val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
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MIIMU_REGADDR(reg) | MIIMU_PHY_NRES;
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writel(val, NETX_MIIMU);
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while (readl(NETX_MIIMU) & MIIMU_SNRDY);
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return readl(NETX_MIIMU) >> 16;
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}
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static void
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netx_eth_phy_write(struct net_device *ndev, int phy_id, int reg, int value)
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{
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unsigned int val;
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val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
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MIIMU_REGADDR(reg) | MIIMU_PHY_NRES | MIIMU_OPMODE_WRITE |
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MIIMU_DATA(value);
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writel(val, NETX_MIIMU);
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while (readl(NETX_MIIMU) & MIIMU_SNRDY);
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}
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static const struct net_device_ops netx_eth_netdev_ops = {
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.ndo_open = netx_eth_open,
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.ndo_stop = netx_eth_close,
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.ndo_start_xmit = netx_eth_hard_start_xmit,
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.ndo_tx_timeout = netx_eth_timeout,
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.ndo_set_multicast_list = netx_eth_set_multicast_list,
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.ndo_change_mtu = eth_change_mtu,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_set_mac_address = eth_mac_addr,
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};
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static int netx_eth_enable(struct net_device *ndev)
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{
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struct netx_eth_priv *priv = netdev_priv(ndev);
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unsigned int mac4321, mac65;
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int running, i;
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ether_setup(ndev);
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ndev->netdev_ops = &netx_eth_netdev_ops;
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ndev->watchdog_timeo = msecs_to_jiffies(5000);
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priv->msg_enable = NETIF_MSG_LINK;
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priv->mii.phy_id_mask = 0x1f;
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priv->mii.reg_num_mask = 0x1f;
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priv->mii.force_media = 0;
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priv->mii.full_duplex = 0;
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priv->mii.dev = ndev;
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priv->mii.mdio_read = netx_eth_phy_read;
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priv->mii.mdio_write = netx_eth_phy_write;
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priv->mii.phy_id = INTERNAL_PHY_ADR + priv->id;
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running = xc_running(priv->xc);
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xc_stop(priv->xc);
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/* if the xc engine is already running, assume the bootloader has
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* loaded the firmware for us
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*/
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if (running) {
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/* get Node Address from hardware */
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mac4321 = readl(priv->xpec_base +
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NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
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mac65 = readl(priv->xpec_base +
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NETX_XPEC_RAM_START_OFS + ETH_MAC_65);
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ndev->dev_addr[0] = mac4321 & 0xff;
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ndev->dev_addr[1] = (mac4321 >> 8) & 0xff;
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ndev->dev_addr[2] = (mac4321 >> 16) & 0xff;
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ndev->dev_addr[3] = (mac4321 >> 24) & 0xff;
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ndev->dev_addr[4] = mac65 & 0xff;
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ndev->dev_addr[5] = (mac65 >> 8) & 0xff;
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} else {
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if (xc_request_firmware(priv->xc)) {
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printk(CARDNAME ": requesting firmware failed\n");
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return -ENODEV;
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}
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}
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xc_reset(priv->xc);
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xc_start(priv->xc);
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if (!is_valid_ether_addr(ndev->dev_addr))
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printk("%s: Invalid ethernet MAC address. Please "
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"set using ifconfig\n", ndev->name);
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for (i=2; i<=18; i++)
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pfifo_push(EMPTY_PTR_FIFO(priv->id),
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FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));
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return register_netdev(ndev);
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}
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static int netx_eth_drv_probe(struct platform_device *pdev)
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{
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struct netx_eth_priv *priv;
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struct net_device *ndev;
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struct netxeth_platform_data *pdata;
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int ret;
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ndev = alloc_etherdev(sizeof (struct netx_eth_priv));
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if (!ndev) {
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printk("%s: could not allocate device.\n", CARDNAME);
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ret = -ENOMEM;
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goto exit;
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}
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SET_NETDEV_DEV(ndev, &pdev->dev);
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platform_set_drvdata(pdev, ndev);
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priv = netdev_priv(ndev);
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pdata = (struct netxeth_platform_data *)pdev->dev.platform_data;
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priv->xc = request_xc(pdata->xcno, &pdev->dev);
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if (!priv->xc) {
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dev_err(&pdev->dev, "unable to request xc engine\n");
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ret = -ENODEV;
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goto exit_free_netdev;
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}
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ndev->irq = priv->xc->irq;
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priv->id = pdev->id;
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priv->xpec_base = priv->xc->xpec_base;
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priv->xmac_base = priv->xc->xmac_base;
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priv->sram_base = priv->xc->sram_base;
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spin_lock_init(&priv->lock);
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ret = pfifo_request(PFIFO_MASK(priv->id));
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if (ret) {
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printk("unable to request PFIFO\n");
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goto exit_free_xc;
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}
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ret = netx_eth_enable(ndev);
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if (ret)
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goto exit_free_pfifo;
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return 0;
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exit_free_pfifo:
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pfifo_free(PFIFO_MASK(priv->id));
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exit_free_xc:
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free_xc(priv->xc);
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exit_free_netdev:
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platform_set_drvdata(pdev, NULL);
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free_netdev(ndev);
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exit:
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return ret;
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}
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static int netx_eth_drv_remove(struct platform_device *pdev)
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{
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struct net_device *ndev = dev_get_drvdata(&pdev->dev);
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struct netx_eth_priv *priv = netdev_priv(ndev);
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platform_set_drvdata(pdev, NULL);
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unregister_netdev(ndev);
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xc_stop(priv->xc);
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free_xc(priv->xc);
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free_netdev(ndev);
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pfifo_free(PFIFO_MASK(priv->id));
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return 0;
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}
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static int netx_eth_drv_suspend(struct platform_device *pdev, pm_message_t state)
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{
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dev_err(&pdev->dev, "suspend not implemented\n");
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return 0;
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}
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static int netx_eth_drv_resume(struct platform_device *pdev)
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{
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dev_err(&pdev->dev, "resume not implemented\n");
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return 0;
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}
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static struct platform_driver netx_eth_driver = {
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.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");
|