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1707 lines
50 KiB
1707 lines
50 KiB
/*====================================================================== |
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|
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A PCMCIA ethernet driver for Asix AX88190-based cards |
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|
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The Asix AX88190 is a NS8390-derived chipset with a few nasty |
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idiosyncracies that make it very inconvenient to support with a |
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standard 8390 driver. This driver is based on pcnet_cs, with the |
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tweaked 8390 code grafted on the end. Much of what I did was to |
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clean up and update a similar driver supplied by Asix, which was |
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adapted by William Lee, [email protected]. |
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|
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Copyright (C) 2001 David A. Hinds -- [email protected] |
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axnet_cs.c 1.28 2002/06/29 06:27:37 |
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The network driver code is based on Donald Becker's NE2000 code: |
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Written 1992,1993 by Donald Becker. |
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Copyright 1993 United States Government as represented by the |
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Director, National Security Agency. This software may be used and |
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distributed according to the terms of the GNU General Public License, |
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incorporated herein by reference. |
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Donald Becker may be reached at [email protected] |
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======================================================================*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/ptrace.h> |
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#include <linux/string.h> |
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#include <linux/timer.h> |
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#include <linux/delay.h> |
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#include <linux/spinlock.h> |
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#include <linux/netdevice.h> |
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#include <linux/etherdevice.h> |
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#include <linux/crc32.h> |
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#include <linux/mii.h> |
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#include "8390.h" |
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#include <pcmcia/cistpl.h> |
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#include <pcmcia/ciscode.h> |
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#include <pcmcia/ds.h> |
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#include <pcmcia/cisreg.h> |
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#include <asm/io.h> |
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#include <asm/byteorder.h> |
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#include <linux/uaccess.h> |
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#define AXNET_CMD 0x00 |
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#define AXNET_DATAPORT 0x10 /* NatSemi-defined port window offset. */ |
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#define AXNET_RESET 0x1f /* Issue a read to reset, a write to clear. */ |
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#define AXNET_MII_EEP 0x14 /* Offset of MII access port */ |
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#define AXNET_TEST 0x15 /* Offset of TEST Register port */ |
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#define AXNET_GPIO 0x17 /* Offset of General Purpose Register Port */ |
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#define AXNET_START_PG 0x40 /* First page of TX buffer */ |
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#define AXNET_STOP_PG 0x80 /* Last page +1 of RX ring */ |
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#define AXNET_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */ |
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#define IS_AX88190 0x0001 |
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#define IS_AX88790 0x0002 |
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/*====================================================================*/ |
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/* Module parameters */ |
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MODULE_AUTHOR("David Hinds <[email protected]>"); |
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MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver"); |
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MODULE_LICENSE("GPL"); |
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/*====================================================================*/ |
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static int axnet_config(struct pcmcia_device *link); |
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static void axnet_release(struct pcmcia_device *link); |
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static int axnet_open(struct net_device *dev); |
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static int axnet_close(struct net_device *dev); |
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static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); |
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static netdev_tx_t axnet_start_xmit(struct sk_buff *skb, |
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struct net_device *dev); |
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static struct net_device_stats *get_stats(struct net_device *dev); |
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static void set_multicast_list(struct net_device *dev); |
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static void axnet_tx_timeout(struct net_device *dev, unsigned int txqueue); |
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static irqreturn_t ei_irq_wrapper(int irq, void *dev_id); |
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static void ei_watchdog(struct timer_list *t); |
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static void axnet_reset_8390(struct net_device *dev); |
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static int mdio_read(unsigned int addr, int phy_id, int loc); |
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static void mdio_write(unsigned int addr, int phy_id, int loc, int value); |
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static void get_8390_hdr(struct net_device *, |
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struct e8390_pkt_hdr *, int); |
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static void block_input(struct net_device *dev, int count, |
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struct sk_buff *skb, int ring_offset); |
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static void block_output(struct net_device *dev, int count, |
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const u_char *buf, const int start_page); |
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static void axnet_detach(struct pcmcia_device *p_dev); |
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static void AX88190_init(struct net_device *dev, int startp); |
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static int ax_open(struct net_device *dev); |
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static int ax_close(struct net_device *dev); |
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static irqreturn_t ax_interrupt(int irq, void *dev_id); |
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/*====================================================================*/ |
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struct axnet_dev { |
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struct pcmcia_device *p_dev; |
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caddr_t base; |
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struct timer_list watchdog; |
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int stale, fast_poll; |
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u_short link_status; |
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u_char duplex_flag; |
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int phy_id; |
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int flags; |
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int active_low; |
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}; |
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static inline struct axnet_dev *PRIV(struct net_device *dev) |
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{ |
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void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device); |
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return p; |
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} |
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static const struct net_device_ops axnet_netdev_ops = { |
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.ndo_open = axnet_open, |
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.ndo_stop = axnet_close, |
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.ndo_eth_ioctl = axnet_ioctl, |
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.ndo_start_xmit = axnet_start_xmit, |
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.ndo_tx_timeout = axnet_tx_timeout, |
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.ndo_get_stats = get_stats, |
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.ndo_set_rx_mode = set_multicast_list, |
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.ndo_set_mac_address = eth_mac_addr, |
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.ndo_validate_addr = eth_validate_addr, |
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}; |
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static int axnet_probe(struct pcmcia_device *link) |
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{ |
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struct axnet_dev *info; |
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struct net_device *dev; |
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struct ei_device *ei_local; |
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dev_dbg(&link->dev, "axnet_attach()\n"); |
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dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(struct axnet_dev)); |
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if (!dev) |
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return -ENOMEM; |
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ei_local = netdev_priv(dev); |
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spin_lock_init(&ei_local->page_lock); |
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info = PRIV(dev); |
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info->p_dev = link; |
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link->priv = dev; |
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link->config_flags |= CONF_ENABLE_IRQ; |
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dev->netdev_ops = &axnet_netdev_ops; |
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dev->watchdog_timeo = TX_TIMEOUT; |
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return axnet_config(link); |
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} /* axnet_attach */ |
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static void axnet_detach(struct pcmcia_device *link) |
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{ |
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struct net_device *dev = link->priv; |
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dev_dbg(&link->dev, "axnet_detach(0x%p)\n", link); |
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unregister_netdev(dev); |
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axnet_release(link); |
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free_netdev(dev); |
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} /* axnet_detach */ |
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/*====================================================================== |
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This probes for a card's hardware address by reading the PROM. |
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======================================================================*/ |
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static int get_prom(struct pcmcia_device *link) |
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{ |
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struct net_device *dev = link->priv; |
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unsigned int ioaddr = dev->base_addr; |
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int i, j; |
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/* This is based on drivers/net/ethernet/8390/ne.c */ |
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struct { |
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u_char value, offset; |
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} program_seq[] = { |
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{E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/ |
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{0x01, EN0_DCFG}, /* Set word-wide access. */ |
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{0x00, EN0_RCNTLO}, /* Clear the count regs. */ |
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{0x00, EN0_RCNTHI}, |
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{0x00, EN0_IMR}, /* Mask completion irq. */ |
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{0xFF, EN0_ISR}, |
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{E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */ |
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{E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */ |
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{0x10, EN0_RCNTLO}, |
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{0x00, EN0_RCNTHI}, |
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{0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */ |
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{0x04, EN0_RSARHI}, |
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{E8390_RREAD+E8390_START, E8390_CMD}, |
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}; |
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/* Not much of a test, but the alternatives are messy */ |
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if (link->config_base != 0x03c0) |
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return 0; |
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axnet_reset_8390(dev); |
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mdelay(10); |
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for (i = 0; i < ARRAY_SIZE(program_seq); i++) |
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outb_p(program_seq[i].value, ioaddr + program_seq[i].offset); |
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for (i = 0; i < 6; i += 2) { |
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j = inw(ioaddr + AXNET_DATAPORT); |
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dev->dev_addr[i] = j & 0xff; |
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dev->dev_addr[i+1] = j >> 8; |
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} |
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return 1; |
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} /* get_prom */ |
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static int try_io_port(struct pcmcia_device *link) |
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{ |
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int j, ret; |
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link->resource[0]->flags &= ~IO_DATA_PATH_WIDTH; |
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link->resource[1]->flags &= ~IO_DATA_PATH_WIDTH; |
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if (link->resource[0]->end == 32) { |
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link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO; |
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/* for master/slave multifunction cards */ |
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if (link->resource[1]->end > 0) |
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link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8; |
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} else { |
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/* This should be two 16-port windows */ |
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link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; |
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link->resource[1]->flags |= IO_DATA_PATH_WIDTH_16; |
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} |
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if (link->resource[0]->start == 0) { |
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for (j = 0; j < 0x400; j += 0x20) { |
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link->resource[0]->start = j ^ 0x300; |
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link->resource[1]->start = (j ^ 0x300) + 0x10; |
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link->io_lines = 16; |
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ret = pcmcia_request_io(link); |
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if (ret == 0) |
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return ret; |
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} |
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return ret; |
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} else { |
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return pcmcia_request_io(link); |
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} |
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} |
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static int axnet_configcheck(struct pcmcia_device *p_dev, void *priv_data) |
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{ |
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if (p_dev->config_index == 0) |
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return -EINVAL; |
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p_dev->config_index = 0x05; |
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if (p_dev->resource[0]->end + p_dev->resource[1]->end < 32) |
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return -ENODEV; |
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return try_io_port(p_dev); |
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} |
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static int axnet_config(struct pcmcia_device *link) |
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{ |
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struct net_device *dev = link->priv; |
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struct axnet_dev *info = PRIV(dev); |
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int i, j, j2, ret; |
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dev_dbg(&link->dev, "axnet_config(0x%p)\n", link); |
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/* don't trust the CIS on this; Linksys got it wrong */ |
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link->config_regs = 0x63; |
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link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO; |
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ret = pcmcia_loop_config(link, axnet_configcheck, NULL); |
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if (ret != 0) |
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goto failed; |
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if (!link->irq) |
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goto failed; |
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if (resource_size(link->resource[1]) == 8) |
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link->config_flags |= CONF_ENABLE_SPKR; |
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ret = pcmcia_enable_device(link); |
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if (ret) |
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goto failed; |
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dev->irq = link->irq; |
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dev->base_addr = link->resource[0]->start; |
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if (!get_prom(link)) { |
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pr_notice("this is not an AX88190 card!\n"); |
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pr_notice("use pcnet_cs instead.\n"); |
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goto failed; |
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} |
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ei_status.name = "AX88190"; |
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ei_status.word16 = 1; |
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ei_status.tx_start_page = AXNET_START_PG; |
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ei_status.rx_start_page = AXNET_START_PG + TX_PAGES; |
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ei_status.stop_page = AXNET_STOP_PG; |
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ei_status.reset_8390 = axnet_reset_8390; |
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ei_status.get_8390_hdr = get_8390_hdr; |
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ei_status.block_input = block_input; |
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ei_status.block_output = block_output; |
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if (inb(dev->base_addr + AXNET_TEST) != 0) |
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info->flags |= IS_AX88790; |
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else |
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info->flags |= IS_AX88190; |
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if (info->flags & IS_AX88790) |
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outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */ |
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info->active_low = 0; |
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for (i = 0; i < 32; i++) { |
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j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1); |
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j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2); |
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if (j == j2) continue; |
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if ((j != 0) && (j != 0xffff)) break; |
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} |
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if (i == 32) { |
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/* Maybe PHY is in power down mode. (PPD_SET = 1) |
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Bit 2 of CCSR is active low. */ |
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pcmcia_write_config_byte(link, CISREG_CCSR, 0x04); |
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for (i = 0; i < 32; i++) { |
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j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1); |
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j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2); |
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if (j == j2) continue; |
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if ((j != 0) && (j != 0xffff)) { |
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info->active_low = 1; |
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break; |
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} |
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} |
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} |
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info->phy_id = (i < 32) ? i : -1; |
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SET_NETDEV_DEV(dev, &link->dev); |
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if (register_netdev(dev) != 0) { |
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pr_notice("register_netdev() failed\n"); |
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goto failed; |
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} |
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netdev_info(dev, "Asix AX88%d90: io %#3lx, irq %d, hw_addr %pM\n", |
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((info->flags & IS_AX88790) ? 7 : 1), |
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dev->base_addr, dev->irq, dev->dev_addr); |
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if (info->phy_id != -1) { |
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netdev_dbg(dev, " MII transceiver at index %d, status %x\n", |
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info->phy_id, j); |
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} else { |
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netdev_notice(dev, " No MII transceivers found!\n"); |
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} |
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return 0; |
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failed: |
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axnet_release(link); |
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return -ENODEV; |
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} /* axnet_config */ |
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static void axnet_release(struct pcmcia_device *link) |
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{ |
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pcmcia_disable_device(link); |
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} |
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static int axnet_suspend(struct pcmcia_device *link) |
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{ |
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struct net_device *dev = link->priv; |
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if (link->open) |
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netif_device_detach(dev); |
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return 0; |
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} |
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static int axnet_resume(struct pcmcia_device *link) |
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{ |
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struct net_device *dev = link->priv; |
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struct axnet_dev *info = PRIV(dev); |
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if (link->open) { |
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if (info->active_low == 1) |
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pcmcia_write_config_byte(link, CISREG_CCSR, 0x04); |
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axnet_reset_8390(dev); |
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AX88190_init(dev, 1); |
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netif_device_attach(dev); |
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} |
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return 0; |
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} |
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/*====================================================================== |
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MII interface support |
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======================================================================*/ |
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#define MDIO_SHIFT_CLK 0x01 |
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#define MDIO_DATA_WRITE0 0x00 |
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#define MDIO_DATA_WRITE1 0x08 |
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#define MDIO_DATA_READ 0x04 |
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#define MDIO_MASK 0x0f |
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#define MDIO_ENB_IN 0x02 |
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static void mdio_sync(unsigned int addr) |
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{ |
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int bits; |
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for (bits = 0; bits < 32; bits++) { |
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outb_p(MDIO_DATA_WRITE1, addr); |
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outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr); |
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} |
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} |
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static int mdio_read(unsigned int addr, int phy_id, int loc) |
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{ |
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u_int cmd = (0xf6<<10)|(phy_id<<5)|loc; |
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int i, retval = 0; |
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mdio_sync(addr); |
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for (i = 14; i >= 0; i--) { |
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int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; |
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outb_p(dat, addr); |
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outb_p(dat | MDIO_SHIFT_CLK, addr); |
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} |
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for (i = 19; i > 0; i--) { |
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outb_p(MDIO_ENB_IN, addr); |
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retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0); |
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outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr); |
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} |
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return (retval>>1) & 0xffff; |
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} |
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static void mdio_write(unsigned int addr, int phy_id, int loc, int value) |
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{ |
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u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value; |
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int i; |
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|
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mdio_sync(addr); |
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for (i = 31; i >= 0; i--) { |
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int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0; |
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outb_p(dat, addr); |
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outb_p(dat | MDIO_SHIFT_CLK, addr); |
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} |
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for (i = 1; i >= 0; i--) { |
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outb_p(MDIO_ENB_IN, addr); |
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outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr); |
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} |
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} |
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/*====================================================================*/ |
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static int axnet_open(struct net_device *dev) |
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{ |
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int ret; |
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struct axnet_dev *info = PRIV(dev); |
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struct pcmcia_device *link = info->p_dev; |
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unsigned int nic_base = dev->base_addr; |
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dev_dbg(&link->dev, "axnet_open('%s')\n", dev->name); |
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|
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if (!pcmcia_dev_present(link)) |
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return -ENODEV; |
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outb_p(0xFF, nic_base + EN0_ISR); /* Clear bogus intr. */ |
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ret = request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev); |
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if (ret) |
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return ret; |
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|
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link->open++; |
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|
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info->link_status = 0x00; |
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timer_setup(&info->watchdog, ei_watchdog, 0); |
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mod_timer(&info->watchdog, jiffies + HZ); |
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|
|
return ax_open(dev); |
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} /* axnet_open */ |
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|
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/*====================================================================*/ |
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|
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static int axnet_close(struct net_device *dev) |
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{ |
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struct axnet_dev *info = PRIV(dev); |
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struct pcmcia_device *link = info->p_dev; |
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|
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dev_dbg(&link->dev, "axnet_close('%s')\n", dev->name); |
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|
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ax_close(dev); |
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free_irq(dev->irq, dev); |
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|
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link->open--; |
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netif_stop_queue(dev); |
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del_timer_sync(&info->watchdog); |
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|
|
return 0; |
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} /* axnet_close */ |
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|
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/*====================================================================== |
|
|
|
Hard reset the card. This used to pause for the same period that |
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a 8390 reset command required, but that shouldn't be necessary. |
|
|
|
======================================================================*/ |
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|
|
static void axnet_reset_8390(struct net_device *dev) |
|
{ |
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unsigned int nic_base = dev->base_addr; |
|
int i; |
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|
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ei_status.txing = ei_status.dmaing = 0; |
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|
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD); |
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|
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outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET); |
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|
|
for (i = 0; i < 100; i++) { |
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if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0) |
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break; |
|
udelay(100); |
|
} |
|
outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */ |
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|
|
if (i == 100) |
|
netdev_err(dev, "axnet_reset_8390() did not complete\n"); |
|
|
|
} /* axnet_reset_8390 */ |
|
|
|
/*====================================================================*/ |
|
|
|
static irqreturn_t ei_irq_wrapper(int irq, void *dev_id) |
|
{ |
|
struct net_device *dev = dev_id; |
|
PRIV(dev)->stale = 0; |
|
return ax_interrupt(irq, dev_id); |
|
} |
|
|
|
static void ei_watchdog(struct timer_list *t) |
|
{ |
|
struct axnet_dev *info = from_timer(info, t, watchdog); |
|
struct net_device *dev = info->p_dev->priv; |
|
unsigned int nic_base = dev->base_addr; |
|
unsigned int mii_addr = nic_base + AXNET_MII_EEP; |
|
u_short link; |
|
|
|
if (!netif_device_present(dev)) goto reschedule; |
|
|
|
/* Check for pending interrupt with expired latency timer: with |
|
this, we can limp along even if the interrupt is blocked */ |
|
if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) { |
|
if (!info->fast_poll) |
|
netdev_info(dev, "interrupt(s) dropped!\n"); |
|
ei_irq_wrapper(dev->irq, dev); |
|
info->fast_poll = HZ; |
|
} |
|
if (info->fast_poll) { |
|
info->fast_poll--; |
|
info->watchdog.expires = jiffies + 1; |
|
add_timer(&info->watchdog); |
|
return; |
|
} |
|
|
|
if (info->phy_id < 0) |
|
goto reschedule; |
|
link = mdio_read(mii_addr, info->phy_id, 1); |
|
if (!link || (link == 0xffff)) { |
|
netdev_info(dev, "MII is missing!\n"); |
|
info->phy_id = -1; |
|
goto reschedule; |
|
} |
|
|
|
link &= 0x0004; |
|
if (link != info->link_status) { |
|
u_short p = mdio_read(mii_addr, info->phy_id, 5); |
|
netdev_info(dev, "%s link beat\n", link ? "found" : "lost"); |
|
if (link) { |
|
info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00; |
|
if (p) |
|
netdev_info(dev, "autonegotiation complete: %dbaseT-%cD selected\n", |
|
(p & 0x0180) ? 100 : 10, (p & 0x0140) ? 'F' : 'H'); |
|
else |
|
netdev_info(dev, "link partner did not autonegotiate\n"); |
|
AX88190_init(dev, 1); |
|
} |
|
info->link_status = link; |
|
} |
|
|
|
reschedule: |
|
info->watchdog.expires = jiffies + HZ; |
|
add_timer(&info->watchdog); |
|
} |
|
|
|
/*====================================================================*/ |
|
|
|
static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
|
{ |
|
struct axnet_dev *info = PRIV(dev); |
|
struct mii_ioctl_data *data = if_mii(rq); |
|
unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP; |
|
switch (cmd) { |
|
case SIOCGMIIPHY: |
|
data->phy_id = info->phy_id; |
|
fallthrough; |
|
case SIOCGMIIREG: /* Read MII PHY register. */ |
|
data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f); |
|
return 0; |
|
case SIOCSMIIREG: /* Write MII PHY register. */ |
|
mdio_write(mii_addr, data->phy_id, data->reg_num & 0x1f, data->val_in); |
|
return 0; |
|
} |
|
return -EOPNOTSUPP; |
|
} |
|
|
|
/*====================================================================*/ |
|
|
|
static void get_8390_hdr(struct net_device *dev, |
|
struct e8390_pkt_hdr *hdr, |
|
int ring_page) |
|
{ |
|
unsigned int nic_base = dev->base_addr; |
|
|
|
outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */ |
|
outb_p(ring_page, nic_base + EN0_RSARHI); |
|
outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD); |
|
|
|
insw(nic_base + AXNET_DATAPORT, hdr, |
|
sizeof(struct e8390_pkt_hdr)>>1); |
|
/* Fix for big endian systems */ |
|
hdr->count = le16_to_cpu(hdr->count); |
|
|
|
} |
|
|
|
/*====================================================================*/ |
|
|
|
static void block_input(struct net_device *dev, int count, |
|
struct sk_buff *skb, int ring_offset) |
|
{ |
|
unsigned int nic_base = dev->base_addr; |
|
struct ei_device *ei_local = netdev_priv(dev); |
|
int xfer_count = count; |
|
char *buf = skb->data; |
|
|
|
if ((netif_msg_rx_status(ei_local)) && (count != 4)) |
|
netdev_dbg(dev, "[bi=%d]\n", count+4); |
|
outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO); |
|
outb_p(ring_offset >> 8, nic_base + EN0_RSARHI); |
|
outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD); |
|
|
|
insw(nic_base + AXNET_DATAPORT,buf,count>>1); |
|
if (count & 0x01) { |
|
buf[count-1] = inb(nic_base + AXNET_DATAPORT); |
|
xfer_count++; |
|
} |
|
|
|
} |
|
|
|
/*====================================================================*/ |
|
|
|
static void block_output(struct net_device *dev, int count, |
|
const u_char *buf, const int start_page) |
|
{ |
|
unsigned int nic_base = dev->base_addr; |
|
|
|
pr_debug("%s: [bo=%d]\n", dev->name, count); |
|
|
|
/* Round the count up for word writes. Do we need to do this? |
|
What effect will an odd byte count have on the 8390? |
|
I should check someday. */ |
|
if (count & 0x01) |
|
count++; |
|
|
|
outb_p(0x00, nic_base + EN0_RSARLO); |
|
outb_p(start_page, nic_base + EN0_RSARHI); |
|
outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD); |
|
outsw(nic_base + AXNET_DATAPORT, buf, count>>1); |
|
} |
|
|
|
static const struct pcmcia_device_id axnet_ids[] = { |
|
PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081), |
|
PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301), |
|
PCMCIA_DEVICE_MANF_CARD(0x01bf, 0x2328), |
|
PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301), |
|
PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303), |
|
PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309), |
|
PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106), |
|
PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab), |
|
PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202), |
|
PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090), |
|
PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc), |
|
PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef), |
|
PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef), |
|
PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1), |
|
PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc), |
|
PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b), |
|
PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5), |
|
PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e), |
|
PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXM", 0x5261440f, 0x3abbd061), |
|
PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90), |
|
PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2), |
|
PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8), |
|
PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609), |
|
PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875), |
|
PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04), |
|
PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116), |
|
PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058), |
|
PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef), |
|
PCMCIA_DEVICE_NULL, |
|
}; |
|
MODULE_DEVICE_TABLE(pcmcia, axnet_ids); |
|
|
|
static struct pcmcia_driver axnet_cs_driver = { |
|
.owner = THIS_MODULE, |
|
.name = "axnet_cs", |
|
.probe = axnet_probe, |
|
.remove = axnet_detach, |
|
.id_table = axnet_ids, |
|
.suspend = axnet_suspend, |
|
.resume = axnet_resume, |
|
}; |
|
module_pcmcia_driver(axnet_cs_driver); |
|
|
|
/*====================================================================*/ |
|
|
|
/* 8390.c: A general NS8390 ethernet driver core for linux. */ |
|
/* |
|
Written 1992-94 by Donald Becker. |
|
|
|
Copyright 1993 United States Government as represented by the |
|
Director, National Security Agency. |
|
|
|
This software may be used and distributed according to the terms |
|
of the GNU General Public License, incorporated herein by reference. |
|
|
|
The author may be reached as [email protected], or C/O |
|
Scyld Computing Corporation |
|
410 Severn Ave., Suite 210 |
|
Annapolis MD 21403 |
|
|
|
This is the chip-specific code for many 8390-based ethernet adaptors. |
|
This is not a complete driver, it must be combined with board-specific |
|
code such as ne.c, wd.c, 3c503.c, etc. |
|
|
|
Seeing how at least eight drivers use this code, (not counting the |
|
PCMCIA ones either) it is easy to break some card by what seems like |
|
a simple innocent change. Please contact me or Donald if you think |
|
you have found something that needs changing. -- PG |
|
|
|
Changelog: |
|
|
|
Paul Gortmaker : remove set_bit lock, other cleanups. |
|
Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to |
|
ei_block_input() for eth_io_copy_and_sum(). |
|
Paul Gortmaker : exchange static int ei_pingpong for a #define, |
|
also add better Tx error handling. |
|
Paul Gortmaker : rewrite Rx overrun handling as per NS specs. |
|
Alexey Kuznetsov : use the 8390's six bit hash multicast filter. |
|
Paul Gortmaker : tweak ANK's above multicast changes a bit. |
|
Paul Gortmaker : update packet statistics for v2.1.x |
|
Alan Cox : support arbitrary stupid port mappings on the |
|
68K Macintosh. Support >16bit I/O spaces |
|
Paul Gortmaker : add kmod support for auto-loading of the 8390 |
|
module by all drivers that require it. |
|
Alan Cox : Spinlocking work, added 'BUG_83C690' |
|
Paul Gortmaker : Separate out Tx timeout code from Tx path. |
|
|
|
Sources: |
|
The National Semiconductor LAN Databook, and the 3Com 3c503 databook. |
|
|
|
*/ |
|
|
|
#include <linux/bitops.h> |
|
#include <asm/irq.h> |
|
#include <linux/fcntl.h> |
|
#include <linux/in.h> |
|
#include <linux/interrupt.h> |
|
|
|
#define BUG_83C690 |
|
|
|
/* These are the operational function interfaces to board-specific |
|
routines. |
|
void reset_8390(struct net_device *dev) |
|
Resets the board associated with DEV, including a hardware reset of |
|
the 8390. This is only called when there is a transmit timeout, and |
|
it is always followed by 8390_init(). |
|
void block_output(struct net_device *dev, int count, const unsigned char *buf, |
|
int start_page) |
|
Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The |
|
"page" value uses the 8390's 256-byte pages. |
|
void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page) |
|
Read the 4 byte, page aligned 8390 header. *If* there is a |
|
subsequent read, it will be of the rest of the packet. |
|
void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset) |
|
Read COUNT bytes from the packet buffer into the skb data area. Start |
|
reading from RING_OFFSET, the address as the 8390 sees it. This will always |
|
follow the read of the 8390 header. |
|
*/ |
|
#define ei_reset_8390 (ei_local->reset_8390) |
|
#define ei_block_output (ei_local->block_output) |
|
#define ei_block_input (ei_local->block_input) |
|
#define ei_get_8390_hdr (ei_local->get_8390_hdr) |
|
|
|
/* Index to functions. */ |
|
static void ei_tx_intr(struct net_device *dev); |
|
static void ei_tx_err(struct net_device *dev); |
|
static void ei_receive(struct net_device *dev); |
|
static void ei_rx_overrun(struct net_device *dev); |
|
|
|
/* Routines generic to NS8390-based boards. */ |
|
static void NS8390_trigger_send(struct net_device *dev, unsigned int length, |
|
int start_page); |
|
static void do_set_multicast_list(struct net_device *dev); |
|
|
|
/* |
|
* SMP and the 8390 setup. |
|
* |
|
* The 8390 isn't exactly designed to be multithreaded on RX/TX. There is |
|
* a page register that controls bank and packet buffer access. We guard |
|
* this with ei_local->page_lock. Nobody should assume or set the page other |
|
* than zero when the lock is not held. Lock holders must restore page 0 |
|
* before unlocking. Even pure readers must take the lock to protect in |
|
* page 0. |
|
* |
|
* To make life difficult the chip can also be very slow. We therefore can't |
|
* just use spinlocks. For the longer lockups we disable the irq the device |
|
* sits on and hold the lock. We must hold the lock because there is a dual |
|
* processor case other than interrupts (get stats/set multicast list in |
|
* parallel with each other and transmit). |
|
* |
|
* Note: in theory we can just disable the irq on the card _but_ there is |
|
* a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs" |
|
* enter lock, take the queued irq. So we waddle instead of flying. |
|
* |
|
* Finally by special arrangement for the purpose of being generally |
|
* annoying the transmit function is called bh atomic. That places |
|
* restrictions on the user context callers as disable_irq won't save |
|
* them. |
|
*/ |
|
|
|
/** |
|
* ax_open - Open/initialize the board. |
|
* @dev: network device to initialize |
|
* |
|
* This routine goes all-out, setting everything |
|
* up anew at each open, even though many of these registers should only |
|
* need to be set once at boot. |
|
*/ |
|
static int ax_open(struct net_device *dev) |
|
{ |
|
unsigned long flags; |
|
struct ei_device *ei_local = netdev_priv(dev); |
|
|
|
/* |
|
* Grab the page lock so we own the register set, then call |
|
* the init function. |
|
*/ |
|
|
|
spin_lock_irqsave(&ei_local->page_lock, flags); |
|
AX88190_init(dev, 1); |
|
/* Set the flag before we drop the lock, That way the IRQ arrives |
|
after its set and we get no silly warnings */ |
|
netif_start_queue(dev); |
|
spin_unlock_irqrestore(&ei_local->page_lock, flags); |
|
ei_local->irqlock = 0; |
|
return 0; |
|
} |
|
|
|
#define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock) |
|
|
|
/** |
|
* ax_close - shut down network device |
|
* @dev: network device to close |
|
* |
|
* Opposite of ax_open(). Only used when "ifconfig <devname> down" is done. |
|
*/ |
|
static int ax_close(struct net_device *dev) |
|
{ |
|
unsigned long flags; |
|
|
|
/* |
|
* Hold the page lock during close |
|
*/ |
|
|
|
spin_lock_irqsave(&dev_lock(dev), flags); |
|
AX88190_init(dev, 0); |
|
spin_unlock_irqrestore(&dev_lock(dev), flags); |
|
netif_stop_queue(dev); |
|
return 0; |
|
} |
|
|
|
/** |
|
* axnet_tx_timeout - handle transmit time out condition |
|
* @dev: network device which has apparently fallen asleep |
|
* @txqueue: unused |
|
* |
|
* Called by kernel when device never acknowledges a transmit has |
|
* completed (or failed) - i.e. never posted a Tx related interrupt. |
|
*/ |
|
|
|
static void axnet_tx_timeout(struct net_device *dev, unsigned int txqueue) |
|
{ |
|
long e8390_base = dev->base_addr; |
|
struct ei_device *ei_local = netdev_priv(dev); |
|
int txsr, isr, tickssofar = jiffies - dev_trans_start(dev); |
|
unsigned long flags; |
|
|
|
dev->stats.tx_errors++; |
|
|
|
spin_lock_irqsave(&ei_local->page_lock, flags); |
|
txsr = inb(e8390_base+EN0_TSR); |
|
isr = inb(e8390_base+EN0_ISR); |
|
spin_unlock_irqrestore(&ei_local->page_lock, flags); |
|
|
|
netdev_dbg(dev, "Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n", |
|
(txsr & ENTSR_ABT) ? "excess collisions." : |
|
(isr) ? "lost interrupt?" : "cable problem?", |
|
txsr, isr, tickssofar); |
|
|
|
if (!isr && !dev->stats.tx_packets) |
|
{ |
|
/* The 8390 probably hasn't gotten on the cable yet. */ |
|
ei_local->interface_num ^= 1; /* Try a different xcvr. */ |
|
} |
|
|
|
/* Ugly but a reset can be slow, yet must be protected */ |
|
|
|
spin_lock_irqsave(&ei_local->page_lock, flags); |
|
|
|
/* Try to restart the card. Perhaps the user has fixed something. */ |
|
ei_reset_8390(dev); |
|
AX88190_init(dev, 1); |
|
|
|
spin_unlock_irqrestore(&ei_local->page_lock, flags); |
|
netif_wake_queue(dev); |
|
} |
|
|
|
/** |
|
* axnet_start_xmit - begin packet transmission |
|
* @skb: packet to be sent |
|
* @dev: network device to which packet is sent |
|
* |
|
* Sends a packet to an 8390 network device. |
|
*/ |
|
|
|
static netdev_tx_t axnet_start_xmit(struct sk_buff *skb, |
|
struct net_device *dev) |
|
{ |
|
long e8390_base = dev->base_addr; |
|
struct ei_device *ei_local = netdev_priv(dev); |
|
int length, send_length, output_page; |
|
unsigned long flags; |
|
u8 packet[ETH_ZLEN]; |
|
|
|
netif_stop_queue(dev); |
|
|
|
length = skb->len; |
|
|
|
/* Mask interrupts from the ethercard. |
|
SMP: We have to grab the lock here otherwise the IRQ handler |
|
on another CPU can flip window and race the IRQ mask set. We end |
|
up trashing the mcast filter not disabling irqs if we don't lock */ |
|
|
|
spin_lock_irqsave(&ei_local->page_lock, flags); |
|
outb_p(0x00, e8390_base + EN0_IMR); |
|
|
|
/* |
|
* Slow phase with lock held. |
|
*/ |
|
|
|
ei_local->irqlock = 1; |
|
|
|
send_length = max(length, ETH_ZLEN); |
|
|
|
/* |
|
* We have two Tx slots available for use. Find the first free |
|
* slot, and then perform some sanity checks. With two Tx bufs, |
|
* you get very close to transmitting back-to-back packets. With |
|
* only one Tx buf, the transmitter sits idle while you reload the |
|
* card, leaving a substantial gap between each transmitted packet. |
|
*/ |
|
|
|
if (ei_local->tx1 == 0) |
|
{ |
|
output_page = ei_local->tx_start_page; |
|
ei_local->tx1 = send_length; |
|
if ((netif_msg_tx_queued(ei_local)) && |
|
ei_local->tx2 > 0) |
|
netdev_dbg(dev, |
|
"idle transmitter tx2=%d, lasttx=%d, txing=%d\n", |
|
ei_local->tx2, ei_local->lasttx, |
|
ei_local->txing); |
|
} |
|
else if (ei_local->tx2 == 0) |
|
{ |
|
output_page = ei_local->tx_start_page + TX_PAGES/2; |
|
ei_local->tx2 = send_length; |
|
if ((netif_msg_tx_queued(ei_local)) && |
|
ei_local->tx1 > 0) |
|
netdev_dbg(dev, |
|
"idle transmitter, tx1=%d, lasttx=%d, txing=%d\n", |
|
ei_local->tx1, ei_local->lasttx, |
|
ei_local->txing); |
|
} |
|
else |
|
{ /* We should never get here. */ |
|
netif_dbg(ei_local, tx_err, dev, |
|
"No Tx buffers free! tx1=%d tx2=%d last=%d\n", |
|
ei_local->tx1, ei_local->tx2, |
|
ei_local->lasttx); |
|
ei_local->irqlock = 0; |
|
netif_stop_queue(dev); |
|
outb_p(ENISR_ALL, e8390_base + EN0_IMR); |
|
spin_unlock_irqrestore(&ei_local->page_lock, flags); |
|
dev->stats.tx_errors++; |
|
return NETDEV_TX_BUSY; |
|
} |
|
|
|
/* |
|
* Okay, now upload the packet and trigger a send if the transmitter |
|
* isn't already sending. If it is busy, the interrupt handler will |
|
* trigger the send later, upon receiving a Tx done interrupt. |
|
*/ |
|
|
|
if (length == skb->len) |
|
ei_block_output(dev, length, skb->data, output_page); |
|
else { |
|
memset(packet, 0, ETH_ZLEN); |
|
skb_copy_from_linear_data(skb, packet, skb->len); |
|
ei_block_output(dev, length, packet, output_page); |
|
} |
|
|
|
if (! ei_local->txing) |
|
{ |
|
ei_local->txing = 1; |
|
NS8390_trigger_send(dev, send_length, output_page); |
|
netif_trans_update(dev); |
|
if (output_page == ei_local->tx_start_page) |
|
{ |
|
ei_local->tx1 = -1; |
|
ei_local->lasttx = -1; |
|
} |
|
else |
|
{ |
|
ei_local->tx2 = -1; |
|
ei_local->lasttx = -2; |
|
} |
|
} |
|
else ei_local->txqueue++; |
|
|
|
if (ei_local->tx1 && ei_local->tx2) |
|
netif_stop_queue(dev); |
|
else |
|
netif_start_queue(dev); |
|
|
|
/* Turn 8390 interrupts back on. */ |
|
ei_local->irqlock = 0; |
|
outb_p(ENISR_ALL, e8390_base + EN0_IMR); |
|
|
|
spin_unlock_irqrestore(&ei_local->page_lock, flags); |
|
|
|
dev_kfree_skb (skb); |
|
dev->stats.tx_bytes += send_length; |
|
|
|
return NETDEV_TX_OK; |
|
} |
|
|
|
/** |
|
* ax_interrupt - handle the interrupts from an 8390 |
|
* @irq: interrupt number |
|
* @dev_id: a pointer to the net_device |
|
* |
|
* Handle the ether interface interrupts. We pull packets from |
|
* the 8390 via the card specific functions and fire them at the networking |
|
* stack. We also handle transmit completions and wake the transmit path if |
|
* necessary. We also update the counters and do other housekeeping as |
|
* needed. |
|
*/ |
|
|
|
static irqreturn_t ax_interrupt(int irq, void *dev_id) |
|
{ |
|
struct net_device *dev = dev_id; |
|
long e8390_base; |
|
int interrupts, nr_serviced = 0, i; |
|
struct ei_device *ei_local; |
|
int handled = 0; |
|
unsigned long flags; |
|
|
|
e8390_base = dev->base_addr; |
|
ei_local = netdev_priv(dev); |
|
|
|
/* |
|
* Protect the irq test too. |
|
*/ |
|
|
|
spin_lock_irqsave(&ei_local->page_lock, flags); |
|
|
|
if (ei_local->irqlock) { |
|
#if 1 /* This might just be an interrupt for a PCI device sharing this line */ |
|
const char *msg; |
|
/* The "irqlock" check is only for testing. */ |
|
if (ei_local->irqlock) |
|
msg = "Interrupted while interrupts are masked!"; |
|
else |
|
msg = "Reentering the interrupt handler!"; |
|
netdev_info(dev, "%s, isr=%#2x imr=%#2x\n", |
|
msg, |
|
inb_p(e8390_base + EN0_ISR), |
|
inb_p(e8390_base + EN0_IMR)); |
|
#endif |
|
spin_unlock_irqrestore(&ei_local->page_lock, flags); |
|
return IRQ_NONE; |
|
} |
|
|
|
netif_dbg(ei_local, intr, dev, "interrupt(isr=%#2.2x)\n", |
|
inb_p(e8390_base + EN0_ISR)); |
|
|
|
outb_p(0x00, e8390_base + EN0_ISR); |
|
ei_local->irqlock = 1; |
|
|
|
/* !!Assumption!! -- we stay in page 0. Don't break this. */ |
|
while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 && |
|
++nr_serviced < MAX_SERVICE) |
|
{ |
|
if (!netif_running(dev) || (interrupts == 0xff)) { |
|
netif_warn(ei_local, intr, dev, |
|
"interrupt from stopped card\n"); |
|
outb_p(interrupts, e8390_base + EN0_ISR); |
|
interrupts = 0; |
|
break; |
|
} |
|
handled = 1; |
|
|
|
/* AX88190 bug fix. */ |
|
outb_p(interrupts, e8390_base + EN0_ISR); |
|
for (i = 0; i < 10; i++) { |
|
if (!(inb(e8390_base + EN0_ISR) & interrupts)) |
|
break; |
|
outb_p(0, e8390_base + EN0_ISR); |
|
outb_p(interrupts, e8390_base + EN0_ISR); |
|
} |
|
if (interrupts & ENISR_OVER) |
|
ei_rx_overrun(dev); |
|
else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) |
|
{ |
|
/* Got a good (?) packet. */ |
|
ei_receive(dev); |
|
} |
|
/* Push the next to-transmit packet through. */ |
|
if (interrupts & ENISR_TX) |
|
ei_tx_intr(dev); |
|
else if (interrupts & ENISR_TX_ERR) |
|
ei_tx_err(dev); |
|
|
|
if (interrupts & ENISR_COUNTERS) |
|
{ |
|
dev->stats.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0); |
|
dev->stats.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1); |
|
dev->stats.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2); |
|
} |
|
} |
|
|
|
if (interrupts && (netif_msg_intr(ei_local))) |
|
{ |
|
handled = 1; |
|
if (nr_serviced >= MAX_SERVICE) |
|
{ |
|
/* 0xFF is valid for a card removal */ |
|
if (interrupts != 0xFF) |
|
netdev_warn(dev, |
|
"Too much work at interrupt, status %#2.2x\n", |
|
interrupts); |
|
outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */ |
|
} else { |
|
netdev_warn(dev, "unknown interrupt %#2x\n", |
|
interrupts); |
|
outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */ |
|
} |
|
} |
|
|
|
/* Turn 8390 interrupts back on. */ |
|
ei_local->irqlock = 0; |
|
outb_p(ENISR_ALL, e8390_base + EN0_IMR); |
|
|
|
spin_unlock_irqrestore(&ei_local->page_lock, flags); |
|
return IRQ_RETVAL(handled); |
|
} |
|
|
|
/** |
|
* ei_tx_err - handle transmitter error |
|
* @dev: network device which threw the exception |
|
* |
|
* A transmitter error has happened. Most likely excess collisions (which |
|
* is a fairly normal condition). If the error is one where the Tx will |
|
* have been aborted, we try and send another one right away, instead of |
|
* letting the failed packet sit and collect dust in the Tx buffer. This |
|
* is a much better solution as it avoids kernel based Tx timeouts, and |
|
* an unnecessary card reset. |
|
* |
|
* Called with lock held. |
|
*/ |
|
|
|
static void ei_tx_err(struct net_device *dev) |
|
{ |
|
long e8390_base = dev->base_addr; |
|
unsigned char txsr = inb_p(e8390_base+EN0_TSR); |
|
unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU); |
|
|
|
#ifdef VERBOSE_ERROR_DUMP |
|
netdev_dbg(dev, "transmitter error (%#2x):", txsr); |
|
if (txsr & ENTSR_ABT) |
|
pr_cont(" excess-collisions"); |
|
if (txsr & ENTSR_ND) |
|
pr_cont(" non-deferral"); |
|
if (txsr & ENTSR_CRS) |
|
pr_cont(" lost-carrier"); |
|
if (txsr & ENTSR_FU) |
|
pr_cont(" FIFO-underrun"); |
|
if (txsr & ENTSR_CDH) |
|
pr_cont(" lost-heartbeat"); |
|
pr_cont("\n"); |
|
#endif |
|
|
|
if (tx_was_aborted) |
|
ei_tx_intr(dev); |
|
else |
|
{ |
|
dev->stats.tx_errors++; |
|
if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++; |
|
if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++; |
|
if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++; |
|
} |
|
} |
|
|
|
/** |
|
* ei_tx_intr - transmit interrupt handler |
|
* @dev: network device for which tx intr is handled |
|
* |
|
* We have finished a transmit: check for errors and then trigger the next |
|
* packet to be sent. Called with lock held. |
|
*/ |
|
|
|
static void ei_tx_intr(struct net_device *dev) |
|
{ |
|
long e8390_base = dev->base_addr; |
|
struct ei_device *ei_local = netdev_priv(dev); |
|
int status = inb(e8390_base + EN0_TSR); |
|
|
|
/* |
|
* There are two Tx buffers, see which one finished, and trigger |
|
* the send of another one if it exists. |
|
*/ |
|
ei_local->txqueue--; |
|
|
|
if (ei_local->tx1 < 0) |
|
{ |
|
if (ei_local->lasttx != 1 && ei_local->lasttx != -1) |
|
netdev_err(dev, "%s: bogus last_tx_buffer %d, tx1=%d\n", |
|
ei_local->name, ei_local->lasttx, |
|
ei_local->tx1); |
|
ei_local->tx1 = 0; |
|
if (ei_local->tx2 > 0) |
|
{ |
|
ei_local->txing = 1; |
|
NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6); |
|
netif_trans_update(dev); |
|
ei_local->tx2 = -1; |
|
ei_local->lasttx = 2; |
|
} else { |
|
ei_local->lasttx = 20; |
|
ei_local->txing = 0; |
|
} |
|
} |
|
else if (ei_local->tx2 < 0) |
|
{ |
|
if (ei_local->lasttx != 2 && ei_local->lasttx != -2) |
|
netdev_err(dev, "%s: bogus last_tx_buffer %d, tx2=%d\n", |
|
ei_local->name, ei_local->lasttx, |
|
ei_local->tx2); |
|
ei_local->tx2 = 0; |
|
if (ei_local->tx1 > 0) |
|
{ |
|
ei_local->txing = 1; |
|
NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page); |
|
netif_trans_update(dev); |
|
ei_local->tx1 = -1; |
|
ei_local->lasttx = 1; |
|
} else { |
|
ei_local->lasttx = 10; |
|
ei_local->txing = 0; |
|
} |
|
} |
|
// else |
|
// netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n", |
|
// ei_local->lasttx); |
|
|
|
/* Minimize Tx latency: update the statistics after we restart TXing. */ |
|
if (status & ENTSR_COL) |
|
dev->stats.collisions++; |
|
if (status & ENTSR_PTX) |
|
dev->stats.tx_packets++; |
|
else |
|
{ |
|
dev->stats.tx_errors++; |
|
if (status & ENTSR_ABT) |
|
{ |
|
dev->stats.tx_aborted_errors++; |
|
dev->stats.collisions += 16; |
|
} |
|
if (status & ENTSR_CRS) |
|
dev->stats.tx_carrier_errors++; |
|
if (status & ENTSR_FU) |
|
dev->stats.tx_fifo_errors++; |
|
if (status & ENTSR_CDH) |
|
dev->stats.tx_heartbeat_errors++; |
|
if (status & ENTSR_OWC) |
|
dev->stats.tx_window_errors++; |
|
} |
|
netif_wake_queue(dev); |
|
} |
|
|
|
/** |
|
* ei_receive - receive some packets |
|
* @dev: network device with which receive will be run |
|
* |
|
* We have a good packet(s), get it/them out of the buffers. |
|
* Called with lock held. |
|
*/ |
|
|
|
static void ei_receive(struct net_device *dev) |
|
{ |
|
long e8390_base = dev->base_addr; |
|
struct ei_device *ei_local = netdev_priv(dev); |
|
unsigned char rxing_page, this_frame, next_frame; |
|
unsigned short current_offset; |
|
int rx_pkt_count = 0; |
|
struct e8390_pkt_hdr rx_frame; |
|
|
|
while (++rx_pkt_count < 10) |
|
{ |
|
int pkt_len, pkt_stat; |
|
|
|
/* Get the rx page (incoming packet pointer). */ |
|
rxing_page = inb_p(e8390_base + EN1_CURPAG -1); |
|
|
|
/* Remove one frame from the ring. Boundary is always a page behind. */ |
|
this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1; |
|
if (this_frame >= ei_local->stop_page) |
|
this_frame = ei_local->rx_start_page; |
|
|
|
/* Someday we'll omit the previous, iff we never get this message. |
|
(There is at least one clone claimed to have a problem.) |
|
|
|
Keep quiet if it looks like a card removal. One problem here |
|
is that some clones crash in roughly the same way. |
|
*/ |
|
if ((netif_msg_rx_err(ei_local)) && |
|
this_frame != ei_local->current_page && |
|
(this_frame != 0x0 || rxing_page != 0xFF)) |
|
netdev_err(dev, "mismatched read page pointers %2x vs %2x\n", |
|
this_frame, ei_local->current_page); |
|
|
|
if (this_frame == rxing_page) /* Read all the frames? */ |
|
break; /* Done for now */ |
|
|
|
current_offset = this_frame << 8; |
|
ei_get_8390_hdr(dev, &rx_frame, this_frame); |
|
|
|
pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr); |
|
pkt_stat = rx_frame.status; |
|
|
|
next_frame = this_frame + 1 + ((pkt_len+4)>>8); |
|
|
|
if (pkt_len < 60 || pkt_len > 1518) |
|
{ |
|
netif_err(ei_local, rx_err, dev, |
|
"bogus packet size: %d, status=%#2x nxpg=%#2x\n", |
|
rx_frame.count, rx_frame.status, |
|
rx_frame.next); |
|
dev->stats.rx_errors++; |
|
dev->stats.rx_length_errors++; |
|
} |
|
else if ((pkt_stat & 0x0F) == ENRSR_RXOK) |
|
{ |
|
struct sk_buff *skb; |
|
|
|
skb = netdev_alloc_skb(dev, pkt_len + 2); |
|
if (skb == NULL) |
|
{ |
|
netif_err(ei_local, rx_err, dev, |
|
"Couldn't allocate a sk_buff of size %d\n", |
|
pkt_len); |
|
dev->stats.rx_dropped++; |
|
break; |
|
} |
|
else |
|
{ |
|
skb_reserve(skb,2); /* IP headers on 16 byte boundaries */ |
|
skb_put(skb, pkt_len); /* Make room */ |
|
ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame)); |
|
skb->protocol=eth_type_trans(skb,dev); |
|
netif_rx(skb); |
|
dev->stats.rx_packets++; |
|
dev->stats.rx_bytes += pkt_len; |
|
if (pkt_stat & ENRSR_PHY) |
|
dev->stats.multicast++; |
|
} |
|
} |
|
else |
|
{ |
|
netif_err(ei_local, rx_err, dev, |
|
"bogus packet: status=%#2x nxpg=%#2x size=%d\n", |
|
rx_frame.status, rx_frame.next, |
|
rx_frame.count); |
|
dev->stats.rx_errors++; |
|
/* NB: The NIC counts CRC, frame and missed errors. */ |
|
if (pkt_stat & ENRSR_FO) |
|
dev->stats.rx_fifo_errors++; |
|
} |
|
next_frame = rx_frame.next; |
|
|
|
/* This _should_ never happen: it's here for avoiding bad clones. */ |
|
if (next_frame >= ei_local->stop_page) { |
|
netdev_info(dev, "next frame inconsistency, %#2x\n", |
|
next_frame); |
|
next_frame = ei_local->rx_start_page; |
|
} |
|
ei_local->current_page = next_frame; |
|
outb_p(next_frame-1, e8390_base+EN0_BOUNDARY); |
|
} |
|
} |
|
|
|
/** |
|
* ei_rx_overrun - handle receiver overrun |
|
* @dev: network device which threw exception |
|
* |
|
* We have a receiver overrun: we have to kick the 8390 to get it started |
|
* again. Problem is that you have to kick it exactly as NS prescribes in |
|
* the updated datasheets, or "the NIC may act in an unpredictable manner." |
|
* This includes causing "the NIC to defer indefinitely when it is stopped |
|
* on a busy network." Ugh. |
|
* Called with lock held. Don't call this with the interrupts off or your |
|
* computer will hate you - it takes 10ms or so. |
|
*/ |
|
|
|
static void ei_rx_overrun(struct net_device *dev) |
|
{ |
|
struct axnet_dev *info = PRIV(dev); |
|
long e8390_base = dev->base_addr; |
|
unsigned char was_txing, must_resend = 0; |
|
struct ei_device *ei_local = netdev_priv(dev); |
|
|
|
/* |
|
* Record whether a Tx was in progress and then issue the |
|
* stop command. |
|
*/ |
|
was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS; |
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); |
|
|
|
netif_dbg(ei_local, rx_err, dev, "Receiver overrun\n"); |
|
dev->stats.rx_over_errors++; |
|
|
|
/* |
|
* Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total. |
|
* We wait at least 2ms. |
|
*/ |
|
|
|
mdelay(2); |
|
|
|
/* |
|
* Reset RBCR[01] back to zero as per magic incantation. |
|
*/ |
|
outb_p(0x00, e8390_base+EN0_RCNTLO); |
|
outb_p(0x00, e8390_base+EN0_RCNTHI); |
|
|
|
/* |
|
* See if any Tx was interrupted or not. According to NS, this |
|
* step is vital, and skipping it will cause no end of havoc. |
|
*/ |
|
|
|
if (was_txing) |
|
{ |
|
unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR); |
|
if (!tx_completed) |
|
must_resend = 1; |
|
} |
|
|
|
/* |
|
* Have to enter loopback mode and then restart the NIC before |
|
* you are allowed to slurp packets up off the ring. |
|
*/ |
|
outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); |
|
outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD); |
|
|
|
/* |
|
* Clear the Rx ring of all the debris, and ack the interrupt. |
|
*/ |
|
ei_receive(dev); |
|
|
|
/* |
|
* Leave loopback mode, and resend any packet that got stopped. |
|
*/ |
|
outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR); |
|
if (must_resend) |
|
outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD); |
|
} |
|
|
|
/* |
|
* Collect the stats. This is called unlocked and from several contexts. |
|
*/ |
|
|
|
static struct net_device_stats *get_stats(struct net_device *dev) |
|
{ |
|
long ioaddr = dev->base_addr; |
|
struct ei_device *ei_local = netdev_priv(dev); |
|
unsigned long flags; |
|
|
|
/* If the card is stopped, just return the present stats. */ |
|
if (!netif_running(dev)) |
|
return &dev->stats; |
|
|
|
spin_lock_irqsave(&ei_local->page_lock,flags); |
|
/* Read the counter registers, assuming we are in page 0. */ |
|
dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0); |
|
dev->stats.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1); |
|
dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2); |
|
spin_unlock_irqrestore(&ei_local->page_lock, flags); |
|
|
|
return &dev->stats; |
|
} |
|
|
|
/* |
|
* Form the 64 bit 8390 multicast table from the linked list of addresses |
|
* associated with this dev structure. |
|
*/ |
|
|
|
static inline void make_mc_bits(u8 *bits, struct net_device *dev) |
|
{ |
|
struct netdev_hw_addr *ha; |
|
u32 crc; |
|
|
|
netdev_for_each_mc_addr(ha, dev) { |
|
crc = ether_crc(ETH_ALEN, ha->addr); |
|
/* |
|
* The 8390 uses the 6 most significant bits of the |
|
* CRC to index the multicast table. |
|
*/ |
|
bits[crc>>29] |= (1<<((crc>>26)&7)); |
|
} |
|
} |
|
|
|
/** |
|
* do_set_multicast_list - set/clear multicast filter |
|
* @dev: net device for which multicast filter is adjusted |
|
* |
|
* Set or clear the multicast filter for this adaptor. |
|
* Must be called with lock held. |
|
*/ |
|
|
|
static void do_set_multicast_list(struct net_device *dev) |
|
{ |
|
long e8390_base = dev->base_addr; |
|
int i; |
|
struct ei_device *ei_local = netdev_priv(dev); |
|
|
|
if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) { |
|
memset(ei_local->mcfilter, 0, 8); |
|
if (!netdev_mc_empty(dev)) |
|
make_mc_bits(ei_local->mcfilter, dev); |
|
} else { |
|
/* set to accept-all */ |
|
memset(ei_local->mcfilter, 0xFF, 8); |
|
} |
|
|
|
outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD); |
|
for(i = 0; i < 8; i++) |
|
{ |
|
outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i)); |
|
} |
|
outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD); |
|
|
|
if(dev->flags&IFF_PROMISC) |
|
outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR); |
|
else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) |
|
outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR); |
|
else |
|
outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); |
|
|
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD); |
|
} |
|
|
|
/* |
|
* Called without lock held. This is invoked from user context and may |
|
* be parallel to just about everything else. Its also fairly quick and |
|
* not called too often. Must protect against both bh and irq users |
|
*/ |
|
|
|
static void set_multicast_list(struct net_device *dev) |
|
{ |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&dev_lock(dev), flags); |
|
do_set_multicast_list(dev); |
|
spin_unlock_irqrestore(&dev_lock(dev), flags); |
|
} |
|
|
|
/* This page of functions should be 8390 generic */ |
|
/* Follow National Semi's recommendations for initializing the "NIC". */ |
|
|
|
/** |
|
* AX88190_init - initialize 8390 hardware |
|
* @dev: network device to initialize |
|
* @startp: boolean. non-zero value to initiate chip processing |
|
* |
|
* Must be called with lock held. |
|
*/ |
|
|
|
static void AX88190_init(struct net_device *dev, int startp) |
|
{ |
|
struct axnet_dev *info = PRIV(dev); |
|
long e8390_base = dev->base_addr; |
|
struct ei_device *ei_local = netdev_priv(dev); |
|
int i; |
|
int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48; |
|
|
|
if(sizeof(struct e8390_pkt_hdr)!=4) |
|
panic("8390.c: header struct mispacked\n"); |
|
/* Follow National Semi's recommendations for initing the DP83902. */ |
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */ |
|
outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */ |
|
/* Clear the remote byte count registers. */ |
|
outb_p(0x00, e8390_base + EN0_RCNTLO); |
|
outb_p(0x00, e8390_base + EN0_RCNTHI); |
|
/* Set to monitor and loopback mode -- this is vital!. */ |
|
outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */ |
|
outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */ |
|
/* Set the transmit page and receive ring. */ |
|
outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR); |
|
ei_local->tx1 = ei_local->tx2 = 0; |
|
outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG); |
|
outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/ |
|
ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */ |
|
outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG); |
|
/* Clear the pending interrupts and mask. */ |
|
outb_p(0xFF, e8390_base + EN0_ISR); |
|
outb_p(0x00, e8390_base + EN0_IMR); |
|
|
|
/* Copy the station address into the DS8390 registers. */ |
|
|
|
outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */ |
|
for(i = 0; i < 6; i++) |
|
{ |
|
outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i)); |
|
if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i]) |
|
netdev_err(dev, "Hw. address read/write mismap %d\n", i); |
|
} |
|
|
|
outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG); |
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); |
|
|
|
netif_start_queue(dev); |
|
ei_local->tx1 = ei_local->tx2 = 0; |
|
ei_local->txing = 0; |
|
|
|
if (info->flags & IS_AX88790) /* select Internal PHY */ |
|
outb(0x10, e8390_base + AXNET_GPIO); |
|
|
|
if (startp) |
|
{ |
|
outb_p(0xff, e8390_base + EN0_ISR); |
|
outb_p(ENISR_ALL, e8390_base + EN0_IMR); |
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD); |
|
outb_p(E8390_TXCONFIG | info->duplex_flag, |
|
e8390_base + EN0_TXCR); /* xmit on. */ |
|
/* 3c503 TechMan says rxconfig only after the NIC is started. */ |
|
outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */ |
|
do_set_multicast_list(dev); /* (re)load the mcast table */ |
|
} |
|
} |
|
|
|
/* Trigger a transmit start, assuming the length is valid. |
|
Always called with the page lock held */ |
|
|
|
static void NS8390_trigger_send(struct net_device *dev, unsigned int length, |
|
int start_page) |
|
{ |
|
long e8390_base = dev->base_addr; |
|
struct ei_device *ei_local __attribute((unused)) = netdev_priv(dev); |
|
|
|
if (inb_p(e8390_base) & E8390_TRANS) |
|
{ |
|
netdev_warn(dev, "trigger_send() called with the transmitter busy\n"); |
|
return; |
|
} |
|
outb_p(length & 0xff, e8390_base + EN0_TCNTLO); |
|
outb_p(length >> 8, e8390_base + EN0_TCNTHI); |
|
outb_p(start_page, e8390_base + EN0_TPSR); |
|
outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD); |
|
}
|
|
|