axnet_cs.c
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上传日期:2013-02-24
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文件大小:56k
- /*======================================================================
- A PCMCIA ethernet driver for Asix AX88190-based cards
- The Asix AX88190 is a NS8390-derived chipset with a few nasty
- idiosyncracies that make it very inconvenient to support with a
- standard 8390 driver. This driver is based on pcnet_cs, with the
- tweaked 8390 code grafted on the end. Much of what I did was to
- clean up and update a similar driver supplied by Asix, which was
- adapted by William Lee, william@asix.com.tw.
- Copyright (C) 2001 David A. Hinds -- dahinds@users.sourceforge.net
- axnet_cs.c 1.24 2001/11/18 02:46:51
-
- The network driver code is based on Donald Becker's NE2000 code:
- Written 1992,1993 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.
- Donald Becker may be reached at becker@scyld.com
- ======================================================================*/
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/sched.h>
- #include <linux/ptrace.h>
- #include <linux/slab.h>
- #include <linux/string.h>
- #include <linux/timer.h>
- #include <linux/delay.h>
- #include <linux/spinlock.h>
- #include <asm/io.h>
- #include <asm/system.h>
- #include <asm/byteorder.h>
- #include <linux/netdevice.h>
- #include "../8390.h"
- #include <pcmcia/version.h>
- #include <pcmcia/cs_types.h>
- #include <pcmcia/cs.h>
- #include <pcmcia/cistpl.h>
- #include <pcmcia/ciscode.h>
- #include <pcmcia/ds.h>
- #include <pcmcia/cisreg.h>
- #define AXNET_CMD 0x00
- #define AXNET_DATAPORT 0x10 /* NatSemi-defined port window offset. */
- #define AXNET_RESET 0x1f /* Issue a read to reset, a write to clear. */
- #define AXNET_MII_EEP 0x14 /* Offset of MII access port */
- #define AXNET_START_PG 0x40 /* First page of TX buffer */
- #define AXNET_STOP_PG 0x80 /* Last page +1 of RX ring */
- #define AXNET_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */
- /*====================================================================*/
- /* Module parameters */
- MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
- MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver");
- MODULE_LICENSE("GPL");
- #define INT_MODULE_PARM(n, v) static int n = v; MODULE_PARM(n, "i")
- /* Bit map of interrupts to choose from */
- INT_MODULE_PARM(irq_mask, 0xdeb8);
- static int irq_list[4] = { -1 };
- MODULE_PARM(irq_list, "1-4i");
- #ifdef PCMCIA_DEBUG
- INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
- #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
- static char *version =
- "axnet_cs.c 1.24 2001/11/18 02:46:51 (David Hinds)";
- #else
- #define DEBUG(n, args...)
- #endif
- /*====================================================================*/
- static void axnet_config(dev_link_t *link);
- static void axnet_release(u_long arg);
- static int axnet_event(event_t event, int priority,
- event_callback_args_t *args);
- static int axnet_open(struct net_device *dev);
- static int axnet_close(struct net_device *dev);
- static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
- static void ei_irq_wrapper(int irq, void *dev_id, struct pt_regs *regs);
- static void ei_watchdog(u_long arg);
- static void axnet_reset_8390(struct net_device *dev);
- static int mdio_read(ioaddr_t addr, int phy_id, int loc);
- static void mdio_write(ioaddr_t addr, int phy_id, int loc, int value);
- static void get_8390_hdr(struct net_device *,
- struct e8390_pkt_hdr *, int);
- static void block_input(struct net_device *dev, int count,
- struct sk_buff *skb, int ring_offset);
- static void block_output(struct net_device *dev, int count,
- const u_char *buf, const int start_page);
- static dev_link_t *axnet_attach(void);
- static void axnet_detach(dev_link_t *);
- static dev_info_t dev_info = "axnet_cs";
- static dev_link_t *dev_list;
- static int axdev_init(struct net_device *dev);
- static void AX88190_init(struct net_device *dev, int startp);
- static int ax_open(struct net_device *dev);
- static void ax_interrupt(int irq, void *dev_id, struct pt_regs *regs);
- /*====================================================================*/
- typedef struct axnet_dev_t {
- struct net_device dev; /* so &dev == &axnet_dev_t */
- dev_link_t link;
- dev_node_t node;
- caddr_t base;
- struct timer_list watchdog;
- int stale, fast_poll;
- u_short link_status;
- u_char duplex_flag;
- int phy_id;
- } axnet_dev_t;
- /*======================================================================
- This bit of code is used to avoid unregistering network devices
- at inappropriate times. 2.2 and later kernels are fairly picky
- about when this can happen.
-
- ======================================================================*/
- static void flush_stale_links(void)
- {
- dev_link_t *link, *next;
- for (link = dev_list; link; link = next) {
- next = link->next;
- if (link->state & DEV_STALE_LINK)
- axnet_detach(link);
- }
- }
- /*====================================================================*/
- static void cs_error(client_handle_t handle, int func, int ret)
- {
- error_info_t err = { func, ret };
- CardServices(ReportError, handle, &err);
- }
- /*======================================================================
- We never need to do anything when a axnet device is "initialized"
- by the net software, because we only register already-found cards.
- ======================================================================*/
- static int axnet_init(struct net_device *dev)
- {
- return 0;
- }
- /*======================================================================
- axnet_attach() creates an "instance" of the driver, allocating
- local data structures for one device. The device is registered
- with Card Services.
- ======================================================================*/
- static dev_link_t *axnet_attach(void)
- {
- axnet_dev_t *info;
- dev_link_t *link;
- struct net_device *dev;
- client_reg_t client_reg;
- int i, ret;
- DEBUG(0, "axnet_attach()n");
- flush_stale_links();
- /* Create new ethernet device */
- info = kmalloc(sizeof(*info), GFP_KERNEL);
- if (!info) return NULL;
- memset(info, 0, sizeof(*info));
- link = &info->link; dev = &info->dev;
- link->priv = info;
-
- link->release.function = &axnet_release;
- link->release.data = (u_long)link;
- link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
- link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID;
- if (irq_list[0] == -1)
- link->irq.IRQInfo2 = irq_mask;
- else
- for (i = 0; i < 4; i++)
- link->irq.IRQInfo2 |= 1 << irq_list[i];
- link->conf.Attributes = CONF_ENABLE_IRQ;
- link->conf.IntType = INT_MEMORY_AND_IO;
- axdev_init(dev);
- dev->init = &axnet_init;
- dev->open = &axnet_open;
- dev->stop = &axnet_close;
- dev->do_ioctl = &axnet_ioctl;
- /* Register with Card Services */
- link->next = dev_list;
- dev_list = link;
- client_reg.dev_info = &dev_info;
- client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
- client_reg.EventMask =
- CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
- CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
- CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
- client_reg.event_handler = &axnet_event;
- client_reg.Version = 0x0210;
- client_reg.event_callback_args.client_data = link;
- ret = CardServices(RegisterClient, &link->handle, &client_reg);
- if (ret != CS_SUCCESS) {
- cs_error(link->handle, RegisterClient, ret);
- axnet_detach(link);
- return NULL;
- }
- return link;
- } /* axnet_attach */
- /*======================================================================
- This deletes a driver "instance". The device is de-registered
- with Card Services. If it has been released, all local data
- structures are freed. Otherwise, the structures will be freed
- when the device is released.
- ======================================================================*/
- static void axnet_detach(dev_link_t *link)
- {
- axnet_dev_t *info = link->priv;
- dev_link_t **linkp;
- DEBUG(0, "axnet_detach(0x%p)n", link);
- /* Locate device structure */
- for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
- if (*linkp == link) break;
- if (*linkp == NULL)
- return;
- del_timer(&link->release);
- if (link->state & DEV_CONFIG) {
- axnet_release((u_long)link);
- if (link->state & DEV_STALE_CONFIG) {
- link->state |= DEV_STALE_LINK;
- return;
- }
- }
- if (link->handle)
- CardServices(DeregisterClient, link->handle);
- /* Unlink device structure, free bits */
- *linkp = link->next;
- if (link->dev)
- unregister_netdev(&info->dev);
- kfree(info);
- } /* axnet_detach */
- /*======================================================================
- This probes for a card's hardware address by reading the PROM.
- ======================================================================*/
- static int get_prom(dev_link_t *link)
- {
- struct net_device *dev = link->priv;
- ioaddr_t ioaddr = dev->base_addr;
- int i, j;
- /* This is based on drivers/net/ne.c */
- struct {
- u_char value, offset;
- } program_seq[] = {
- {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
- {0x01, EN0_DCFG}, /* Set word-wide access. */
- {0x00, EN0_RCNTLO}, /* Clear the count regs. */
- {0x00, EN0_RCNTHI},
- {0x00, EN0_IMR}, /* Mask completion irq. */
- {0xFF, EN0_ISR},
- {E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */
- {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
- {0x10, EN0_RCNTLO},
- {0x00, EN0_RCNTHI},
- {0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */
- {0x04, EN0_RSARHI},
- {E8390_RREAD+E8390_START, E8390_CMD},
- };
- /* Not much of a test, but the alternatives are messy */
- if (link->conf.ConfigBase != 0x03c0)
- return 0;
- axnet_reset_8390(dev);
- mdelay(10);
- for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
- outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
- for (i = 0; i < 6; i += 2) {
- j = inw(ioaddr + AXNET_DATAPORT);
- dev->dev_addr[i] = j & 0xff;
- dev->dev_addr[i+1] = j >> 8;
- }
- return 1;
- } /* get_prom */
- /*======================================================================
- axnet_config() is scheduled to run after a CARD_INSERTION event
- is received, to configure the PCMCIA socket, and to make the
- ethernet device available to the system.
- ======================================================================*/
- #define CS_CHECK(fn, args...)
- while ((last_ret=CardServices(last_fn=(fn), args))!=0) goto cs_failed
- #define CFG_CHECK(fn, args...)
- if (CardServices(fn, args) != 0) goto next_entry
- static int try_io_port(dev_link_t *link)
- {
- int j, ret;
- if (link->io.NumPorts1 == 32) {
- link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
- if (link->io.NumPorts2 > 0) {
- /* for master/slave multifunction cards */
- link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
- link->irq.Attributes =
- IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
- }
- } else {
- /* This should be two 16-port windows */
- link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
- link->io.Attributes2 = IO_DATA_PATH_WIDTH_16;
- }
- if (link->io.BasePort1 == 0) {
- link->io.IOAddrLines = 16;
- for (j = 0; j < 0x400; j += 0x20) {
- link->io.BasePort1 = j ^ 0x300;
- link->io.BasePort2 = (j ^ 0x300) + 0x10;
- ret = CardServices(RequestIO, link->handle, &link->io);
- if (ret == CS_SUCCESS) return ret;
- }
- return ret;
- } else {
- return CardServices(RequestIO, link->handle, &link->io);
- }
- }
- static void axnet_config(dev_link_t *link)
- {
- client_handle_t handle = link->handle;
- axnet_dev_t *info = link->priv;
- struct net_device *dev = &info->dev;
- tuple_t tuple;
- cisparse_t parse;
- int i, j, last_ret, last_fn;
- u_short buf[64];
- config_info_t conf;
- DEBUG(0, "axnet_config(0x%p)n", link);
- tuple.Attributes = 0;
- tuple.TupleData = (cisdata_t *)buf;
- tuple.TupleDataMax = sizeof(buf);
- tuple.TupleOffset = 0;
- tuple.DesiredTuple = CISTPL_CONFIG;
- CS_CHECK(GetFirstTuple, handle, &tuple);
- CS_CHECK(GetTupleData, handle, &tuple);
- CS_CHECK(ParseTuple, handle, &tuple, &parse);
- link->conf.ConfigBase = parse.config.base;
- /* don't trust the CIS on this; Linksys got it wrong */
- link->conf.Present = 0x63;
- /* Configure card */
- link->state |= DEV_CONFIG;
- /* Look up current Vcc */
- CS_CHECK(GetConfigurationInfo, handle, &conf);
- link->conf.Vcc = conf.Vcc;
- tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
- tuple.Attributes = 0;
- CS_CHECK(GetFirstTuple, handle, &tuple);
- while (last_ret == CS_SUCCESS) {
- cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
- cistpl_io_t *io = &(parse.cftable_entry.io);
-
- CFG_CHECK(GetTupleData, handle, &tuple);
- CFG_CHECK(ParseTuple, handle, &tuple, &parse);
- if ((cfg->index == 0) || (cfg->io.nwin == 0))
- goto next_entry;
-
- link->conf.ConfigIndex = 0x05;
- /* For multifunction cards, by convention, we configure the
- network function with window 0, and serial with window 1 */
- if (io->nwin > 1) {
- i = (io->win[1].len > io->win[0].len);
- link->io.BasePort2 = io->win[1-i].base;
- link->io.NumPorts2 = io->win[1-i].len;
- } else {
- i = link->io.NumPorts2 = 0;
- }
- link->io.BasePort1 = io->win[i].base;
- link->io.NumPorts1 = io->win[i].len;
- link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
- if (link->io.NumPorts1 + link->io.NumPorts2 >= 32) {
- last_ret = try_io_port(link);
- if (last_ret == CS_SUCCESS) break;
- }
- next_entry:
- last_ret = CardServices(GetNextTuple, handle, &tuple);
- }
- if (last_ret != CS_SUCCESS) {
- cs_error(handle, RequestIO, last_ret);
- goto failed;
- }
- CS_CHECK(RequestIRQ, handle, &link->irq);
-
- if (link->io.NumPorts2 == 8) {
- link->conf.Attributes |= CONF_ENABLE_SPKR;
- link->conf.Status = CCSR_AUDIO_ENA;
- }
-
- CS_CHECK(RequestConfiguration, handle, &link->conf);
- dev->irq = link->irq.AssignedIRQ;
- dev->base_addr = link->io.BasePort1;
- if (register_netdev(dev) != 0) {
- printk(KERN_NOTICE "axnet_cs: register_netdev() failedn");
- goto failed;
- }
- if (!get_prom(link)) {
- printk(KERN_NOTICE "axnet_cs: this is not an AX88190 card!n");
- printk(KERN_NOTICE "axnet_cs: use pcnet_cs instead.n");
- unregister_netdev(dev);
- goto failed;
- }
- ei_status.name = "AX88190";
- ei_status.word16 = 1;
- ei_status.tx_start_page = AXNET_START_PG;
- ei_status.rx_start_page = AXNET_START_PG + TX_PAGES;
- ei_status.stop_page = AXNET_STOP_PG;
- ei_status.reset_8390 = &axnet_reset_8390;
- ei_status.get_8390_hdr = &get_8390_hdr;
- ei_status.block_input = &block_input;
- ei_status.block_output = &block_output;
- strcpy(info->node.dev_name, dev->name);
- link->dev = &info->node;
- link->state &= ~DEV_CONFIG_PENDING;
- printk(KERN_INFO "%s: Asix AX88190: io %#3lx, irq %d, hw_addr ",
- dev->name, dev->base_addr, dev->irq);
- for (i = 0; i < 6; i++)
- printk("%02X%s", dev->dev_addr[i], ((i<5) ? ":" : "n"));
- for (i = 0; i < 32; i++) {
- j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
- if ((j != 0) && (j != 0xffff)) break;
- }
- info->phy_id = (i < 32) ? i : -1;
- if (i < 32) {
- DEBUG(0, " MII transceiver at index %d, status %x.n", i, j);
- } else {
- printk(KERN_NOTICE " No MII transceivers found!n");
- }
- return;
- cs_failed:
- cs_error(link->handle, last_fn, last_ret);
- failed:
- axnet_release((u_long)link);
- return;
- } /* axnet_config */
- /*======================================================================
- After a card is removed, axnet_release() will unregister the net
- device, and release the PCMCIA configuration. If the device is
- still open, this will be postponed until it is closed.
- ======================================================================*/
- static void axnet_release(u_long arg)
- {
- dev_link_t *link = (dev_link_t *)arg;
- DEBUG(0, "axnet_release(0x%p)n", link);
- if (link->open) {
- DEBUG(1, "axnet_cs: release postponed, '%s' still openn",
- ((axnet_dev_t *)(link->priv))->node.dev_name);
- link->state |= DEV_STALE_CONFIG;
- return;
- }
- CardServices(ReleaseConfiguration, link->handle);
- CardServices(ReleaseIO, link->handle, &link->io);
- CardServices(ReleaseIRQ, link->handle, &link->irq);
- link->state &= ~DEV_CONFIG;
- } /* axnet_release */
- /*======================================================================
- The card status event handler. Mostly, this schedules other
- stuff to run after an event is received. A CARD_REMOVAL event
- also sets some flags to discourage the net drivers from trying
- to talk to the card any more.
- ======================================================================*/
- static int axnet_event(event_t event, int priority,
- event_callback_args_t *args)
- {
- dev_link_t *link = args->client_data;
- axnet_dev_t *info = link->priv;
- DEBUG(2, "axnet_event(0x%06x)n", event);
- switch (event) {
- case CS_EVENT_CARD_REMOVAL:
- link->state &= ~DEV_PRESENT;
- if (link->state & DEV_CONFIG) {
- netif_device_detach(&info->dev);
- mod_timer(&link->release, jiffies + HZ/20);
- }
- break;
- case CS_EVENT_CARD_INSERTION:
- link->state |= DEV_PRESENT;
- axnet_config(link);
- break;
- case CS_EVENT_PM_SUSPEND:
- link->state |= DEV_SUSPEND;
- /* Fall through... */
- case CS_EVENT_RESET_PHYSICAL:
- if (link->state & DEV_CONFIG) {
- if (link->open)
- netif_device_detach(&info->dev);
- CardServices(ReleaseConfiguration, link->handle);
- }
- break;
- case CS_EVENT_PM_RESUME:
- link->state &= ~DEV_SUSPEND;
- /* Fall through... */
- case CS_EVENT_CARD_RESET:
- if (link->state & DEV_CONFIG) {
- CardServices(RequestConfiguration, link->handle, &link->conf);
- if (link->open) {
- axnet_reset_8390(&info->dev);
- AX88190_init(&info->dev, 1);
- netif_device_attach(&info->dev);
- }
- }
- break;
- }
- return 0;
- } /* axnet_event */
- /*======================================================================
- MII interface support
- ======================================================================*/
- #define MDIO_SHIFT_CLK 0x01
- #define MDIO_DATA_WRITE0 0x00
- #define MDIO_DATA_WRITE1 0x08
- #define MDIO_DATA_READ 0x04
- #define MDIO_MASK 0x0f
- #define MDIO_ENB_IN 0x02
- static void mdio_sync(ioaddr_t addr)
- {
- int bits;
- for (bits = 0; bits < 32; bits++) {
- outb_p(MDIO_DATA_WRITE1, addr);
- outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
- }
- }
- static int mdio_read(ioaddr_t addr, int phy_id, int loc)
- {
- u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
- int i, retval = 0;
- mdio_sync(addr);
- for (i = 14; i >= 0; i--) {
- int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
- outb_p(dat, addr);
- outb_p(dat | MDIO_SHIFT_CLK, addr);
- }
- for (i = 19; i > 0; i--) {
- outb_p(MDIO_ENB_IN, addr);
- retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
- outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
- }
- return (retval>>1) & 0xffff;
- }
- static void mdio_write(ioaddr_t addr, int phy_id, int loc, int value)
- {
- u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
- int i;
- mdio_sync(addr);
- for (i = 31; i >= 0; i--) {
- int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
- outb_p(dat, addr);
- outb_p(dat | MDIO_SHIFT_CLK, addr);
- }
- for (i = 1; i >= 0; i--) {
- outb_p(MDIO_ENB_IN, addr);
- outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
- }
- }
- /*====================================================================*/
- static int axnet_open(struct net_device *dev)
- {
- axnet_dev_t *info = (axnet_dev_t *)dev;
- dev_link_t *link = &info->link;
-
- DEBUG(2, "axnet_open('%s')n", dev->name);
- if (!DEV_OK(link))
- return -ENODEV;
- link->open++;
- MOD_INC_USE_COUNT;
- request_irq(dev->irq, ei_irq_wrapper, SA_SHIRQ, dev_info, dev);
- info->link_status = 0x00;
- info->watchdog.function = &ei_watchdog;
- info->watchdog.data = (u_long)info;
- info->watchdog.expires = jiffies + HZ;
- add_timer(&info->watchdog);
- return ax_open(dev);
- } /* axnet_open */
- /*====================================================================*/
- static int axnet_close(struct net_device *dev)
- {
- axnet_dev_t *info = (axnet_dev_t *)dev;
- dev_link_t *link = &info->link;
- DEBUG(2, "axnet_close('%s')n", dev->name);
- free_irq(dev->irq, dev);
-
- link->open--;
- netif_stop_queue(dev);
- del_timer(&info->watchdog);
- if (link->state & DEV_STALE_CONFIG)
- mod_timer(&link->release, jiffies + HZ/20);
- MOD_DEC_USE_COUNT;
- return 0;
- } /* axnet_close */
- /*======================================================================
- Hard reset the card. This used to pause for the same period that
- a 8390 reset command required, but that shouldn't be necessary.
- ======================================================================*/
- static void axnet_reset_8390(struct net_device *dev)
- {
- ioaddr_t nic_base = dev->base_addr;
- int i;
- ei_status.txing = ei_status.dmaing = 0;
- outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);
- outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);
- for (i = 0; i < 100; i++) {
- if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
- break;
- udelay(100);
- }
- outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
-
- if (i == 100)
- printk(KERN_ERR "%s: axnet_reset_8390() did not complete.n",
- dev->name);
-
- } /* axnet_reset_8390 */
- /*====================================================================*/
- static void ei_irq_wrapper(int irq, void *dev_id, struct pt_regs *regs)
- {
- axnet_dev_t *info = dev_id;
- info->stale = 0;
- ax_interrupt(irq, dev_id, regs);
- }
- static void ei_watchdog(u_long arg)
- {
- axnet_dev_t *info = (axnet_dev_t *)(arg);
- struct net_device *dev = &info->dev;
- ioaddr_t nic_base = dev->base_addr;
- ioaddr_t 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)
- printk(KERN_INFO "%s: interrupt(s) dropped!n", dev->name);
- ei_irq_wrapper(dev->irq, dev, NULL);
- 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)) {
- printk(KERN_INFO "%s: MII is missing!n", dev->name);
- info->phy_id = -1;
- goto reschedule;
- }
- link &= 0x0004;
- if (link != info->link_status) {
- u_short p = mdio_read(mii_addr, info->phy_id, 5);
- printk(KERN_INFO "%s: %s link beatn", dev->name,
- (link) ? "found" : "lost");
- if (link) {
- info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
- if (p)
- printk(KERN_INFO "%s: autonegotiation complete: "
- "%sbaseT-%cD selectedn", dev->name,
- ((p & 0x0180) ? "100" : "10"),
- ((p & 0x0140) ? 'F' : 'H'));
- else
- printk(KERN_INFO "%s: link partner did not autonegotiaten",
- dev->name);
- 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)
- {
- axnet_dev_t *info = (axnet_dev_t *)dev;
- u16 *data = (u16 *)&rq->ifr_data;
- ioaddr_t mii_addr = dev->base_addr + AXNET_MII_EEP;
- switch (cmd) {
- case SIOCDEVPRIVATE:
- data[0] = info->phy_id;
- case SIOCDEVPRIVATE+1:
- data[3] = mdio_read(mii_addr, data[0], data[1] & 0x1f);
- return 0;
- case SIOCDEVPRIVATE+2:
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- mdio_write(mii_addr, data[0], data[1] & 0x1f, data[2]);
- return 0;
- }
- return -EOPNOTSUPP;
- }
- /*====================================================================*/
- static void get_8390_hdr(struct net_device *dev,
- struct e8390_pkt_hdr *hdr,
- int ring_page)
- {
- ioaddr_t 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)
- {
- ioaddr_t nic_base = dev->base_addr;
- int xfer_count = count;
- char *buf = skb->data;
- #ifdef PCMCIA_DEBUG
- if ((ei_debug > 4) && (count != 4))
- printk(KERN_DEBUG "%s: [bi=%d]n", dev->name, count+4);
- #endif
- 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)
- {
- ioaddr_t nic_base = dev->base_addr;
- #ifdef PCMCIA_DEBUG
- if (ei_debug > 4)
- printk(KERN_DEBUG "%s: [bo=%d]n", dev->name, count);
- #endif
- /* 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 int __init init_axnet_cs(void)
- {
- servinfo_t serv;
- DEBUG(0, "%sn", version);
- CardServices(GetCardServicesInfo, &serv);
- if (serv.Revision != CS_RELEASE_CODE) {
- printk(KERN_NOTICE "axnet_cs: Card Services release "
- "does not match!n");
- return -1;
- }
- register_pccard_driver(&dev_info, &axnet_attach, &axnet_detach);
- return 0;
- }
- static void __exit exit_axnet_cs(void)
- {
- DEBUG(0, "axnet_cs: unloadingn");
- unregister_pccard_driver(&dev_info);
- while (dev_list != NULL)
- axnet_detach(dev_list);
- }
- module_init(init_axnet_cs);
- module_exit(exit_axnet_cs);
- /*====================================================================*/
- /* 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 becker@scyld.com, 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 arbitary 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.
- */
- static const char *version_8390 =
- "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@scyld.com)n";
- #include <asm/uaccess.h>
- #include <asm/bitops.h>
- #include <asm/irq.h>
- #include <linux/fcntl.h>
- #include <linux/in.h>
- #include <linux/interrupt.h>
- #include <linux/etherdevice.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)
- /* use 0 for production, 1 for verification, >2 for debug */
- #ifndef ei_debug
- int ei_debug = 1;
- #endif
- /* Index to functions. */
- static void ei_tx_intr(struct net_device *dev);
- static void ei_tx_err(struct net_device *dev);
- static void ei_tx_timeout(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 set_multicast_list(struct net_device *dev);
- static void do_set_multicast_list(struct net_device *dev);
- /*
- * SMP and the 8390 setup.
- *
- * The 8390 isnt 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 = (struct ei_device *) dev->priv;
- /* This can't happen unless somebody forgot to call axdev_init(). */
- if (ei_local == NULL)
- {
- printk(KERN_EMERG "%s: ax_open passed a non-existent device!n", dev->name);
- return -ENXIO;
- }
- #ifdef HAVE_TX_TIMEOUT
- /* The card I/O part of the driver (e.g. 3c503) can hook a Tx timeout
- wrapper that does e.g. media check & then calls ei_tx_timeout. */
- if (dev->tx_timeout == NULL)
- dev->tx_timeout = ei_tx_timeout;
- if (dev->watchdog_timeo <= 0)
- dev->watchdog_timeo = TX_TIMEOUT;
- #endif
- /*
- * 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;
- }
- /**
- * ei_tx_timeout - handle transmit time out condition
- * @dev: network device which has apparently fallen asleep
- *
- * Called by kernel when device never acknowledges a transmit has
- * completed (or failed) - i.e. never posted a Tx related interrupt.
- */
- void ei_tx_timeout(struct net_device *dev)
- {
- long e8390_base = dev->base_addr;
- struct ei_device *ei_local = (struct ei_device *) dev->priv;
- int txsr, isr, tickssofar = jiffies - dev->trans_start;
- unsigned long flags;
- ei_local->stat.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);
- printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.n",
- dev->name, (txsr & ENTSR_ABT) ? "excess collisions." :
- (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar);
- if (!isr && !ei_local->stat.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 */
-
- disable_irq_nosync(dev->irq);
- spin_lock(&ei_local->page_lock);
-
- /* Try to restart the card. Perhaps the user has fixed something. */
- ei_reset_8390(dev);
- AX88190_init(dev, 1);
-
- spin_unlock(&ei_local->page_lock);
- enable_irq(dev->irq);
- netif_wake_queue(dev);
- }
-
- /**
- * ei_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 int ei_start_xmit(struct sk_buff *skb, struct net_device *dev)
- {
- long e8390_base = dev->base_addr;
- struct ei_device *ei_local = (struct ei_device *) dev->priv;
- int length, send_length, output_page;
- unsigned long flags;
- 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 dont lock */
-
- spin_lock_irqsave(&ei_local->page_lock, flags);
- outb_p(0x00, e8390_base + EN0_IMR);
- spin_unlock_irqrestore(&ei_local->page_lock, flags);
-
- /*
- * Slow phase with lock held.
- */
-
- disable_irq_nosync(dev->irq);
-
- spin_lock(&ei_local->page_lock);
-
- ei_local->irqlock = 1;
- send_length = ETH_ZLEN < length ? 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 (ei_debug && ei_local->tx2 > 0)
- printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.n",
- dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing);
- }
- else if (ei_local->tx2 == 0)
- {
- output_page = ei_local->tx_start_page + TX_1X_PAGES;
- ei_local->tx2 = send_length;
- if (ei_debug && ei_local->tx1 > 0)
- printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.n",
- dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing);
- }
- else
- { /* We should never get here. */
- if (ei_debug)
- printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%dn",
- dev->name, 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(&ei_local->page_lock);
- enable_irq(dev->irq);
- ei_local->stat.tx_errors++;
- return 1;
- }
- /*
- * 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.
- */
- ei_block_output(dev, length, skb->data, output_page);
- if (! ei_local->txing)
- {
- ei_local->txing = 1;
- NS8390_trigger_send(dev, send_length, output_page);
- dev->trans_start = jiffies;
- 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(&ei_local->page_lock);
- enable_irq(dev->irq);
- dev_kfree_skb (skb);
- ei_local->stat.tx_bytes += send_length;
-
- return 0;
- }
- /**
- * ax_interrupt - handle the interrupts from an 8390
- * @irq: interrupt number
- * @dev_id: a pointer to the net_device
- * @regs: unused
- *
- * 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
- * neccessary. We also update the counters and do other housekeeping as
- * needed.
- */
- static void ax_interrupt(int irq, void *dev_id, struct pt_regs * regs)
- {
- struct net_device *dev = dev_id;
- long e8390_base;
- int interrupts, nr_serviced = 0, i;
- struct ei_device *ei_local;
-
- if (dev == NULL)
- {
- printk ("net_interrupt(): irq %d for unknown device.n", irq);
- return;
- }
-
- e8390_base = dev->base_addr;
- ei_local = (struct ei_device *) dev->priv;
- /*
- * Protect the irq test too.
- */
-
- spin_lock(&ei_local->page_lock);
- if (ei_local->irqlock)
- {
- #if 1 /* This might just be an interrupt for a PCI device sharing this line */
- /* The "irqlock" check is only for testing. */
- printk(ei_local->irqlock
- ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.n"
- : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.n",
- dev->name, inb_p(e8390_base + EN0_ISR),
- inb_p(e8390_base + EN0_IMR));
- #endif
- spin_unlock(&ei_local->page_lock);
- return;
- }
-
- if (ei_debug > 3)
- printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).n", dev->name,
- 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)) {
- if (ei_debug > 1)
- printk(KERN_WARNING "%s: interrupt from stopped cardn", dev->name);
- outb_p(interrupts, e8390_base + EN0_ISR);
- interrupts = 0;
- break;
- }
- /* 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)
- {
- ei_local->stat.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
- ei_local->stat.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
- ei_local->stat.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
- }
- }
-
- if (interrupts && ei_debug)
- {
- if (nr_serviced >= MAX_SERVICE)
- {
- /* 0xFF is valid for a card removal */
- if(interrupts!=0xFF)
- printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2xn",
- dev->name, interrupts);
- outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
- } else {
- printk(KERN_WARNING "%s: unknown interrupt %#2xn", dev->name, 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(&ei_local->page_lock);
- return;
- }
- /**
- * 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;
- struct ei_device *ei_local = (struct ei_device *) dev->priv;
- unsigned char txsr = inb_p(e8390_base+EN0_TSR);
- unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
- #ifdef VERBOSE_ERROR_DUMP
- printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr);
- if (txsr & ENTSR_ABT)
- printk("excess-collisions ");
- if (txsr & ENTSR_ND)
- printk("non-deferral ");
- if (txsr & ENTSR_CRS)
- printk("lost-carrier ");
- if (txsr & ENTSR_FU)
- printk("FIFO-underrun ");
- if (txsr & ENTSR_CDH)
- printk("lost-heartbeat ");
- printk("n");
- #endif
- if (tx_was_aborted)
- ei_tx_intr(dev);
- else
- {
- ei_local->stat.tx_errors++;
- if (txsr & ENTSR_CRS) ei_local->stat.tx_carrier_errors++;
- if (txsr & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++;
- if (txsr & ENTSR_OWC) ei_local->stat.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 = (struct ei_device *) dev->priv;
- 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)
- printk(KERN_ERR "%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);
- dev->trans_start = jiffies;
- 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)
- printk("%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);
- dev->trans_start = jiffies;
- ei_local->tx1 = -1;
- ei_local->lasttx = 1;
- }
- else
- ei_local->lasttx = 10, ei_local->txing = 0;
- }
- // else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.n",
- // dev->name, ei_local->lasttx);
- /* Minimize Tx latency: update the statistics after we restart TXing. */
- if (status & ENTSR_COL)
- ei_local->stat.collisions++;
- if (status & ENTSR_PTX)
- ei_local->stat.tx_packets++;
- else
- {
- ei_local->stat.tx_errors++;
- if (status & ENTSR_ABT)
- {
- ei_local->stat.tx_aborted_errors++;
- ei_local->stat.collisions += 16;
- }
- if (status & ENTSR_CRS)
- ei_local->stat.tx_carrier_errors++;
- if (status & ENTSR_FU)
- ei_local->stat.tx_fifo_errors++;
- if (status & ENTSR_CDH)
- ei_local->stat.tx_heartbeat_errors++;
- if (status & ENTSR_OWC)
- ei_local->stat.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 = (struct ei_device *) dev->priv;
- 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 (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
- printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.n",
- dev->name, 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)
- {
- if (ei_debug)
- printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.n",
- dev->name, rx_frame.count, rx_frame.status,
- rx_frame.next);
- ei_local->stat.rx_errors++;
- ei_local->stat.rx_length_errors++;
- }
- else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
- {
- struct sk_buff *skb;
-
- skb = dev_alloc_skb(pkt_len+2);
- if (skb == NULL)
- {
- if (ei_debug > 1)
- printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.n",
- dev->name, pkt_len);
- ei_local->stat.rx_dropped++;
- break;
- }
- else
- {
- skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
- skb->dev = dev;
- 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->last_rx = jiffies;
- ei_local->stat.rx_packets++;
- ei_local->stat.rx_bytes += pkt_len;
- if (pkt_stat & ENRSR_PHY)
- ei_local->stat.multicast++;
- }
- }
- else
- {
- if (ei_debug)
- printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%dn",
- dev->name, rx_frame.status, rx_frame.next,
- rx_frame.count);
- ei_local->stat.rx_errors++;
- /* NB: The NIC counts CRC, frame and missed errors. */
- if (pkt_stat & ENRSR_FO)
- ei_local->stat.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) {
- printk("%s: next frame inconsistency, %#2xn", dev->name,
- next_frame);
- next_frame = ei_local->rx_start_page;
- }
- ei_local->current_page = next_frame;
- outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
- }
- return;
- }
- /**
- * 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)
- {
- axnet_dev_t *info = (axnet_dev_t *)dev;
- long e8390_base = dev->base_addr;
- unsigned char was_txing, must_resend = 0;
- struct ei_device *ei_local = (struct ei_device *) dev->priv;
-
- /*
- * 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);
-
- if (ei_debug > 1)
- printk(KERN_DEBUG "%s: Receiver overrun.n", dev->name);
- ei_local->stat.rx_over_errors++;
-
- /*
- * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
- * Early datasheets said to poll the reset bit, but now they say that
- * it "is not a reliable indicator and subsequently should be ignored."
- * We wait at least 10ms.
- */
- mdelay(10);
- /*
- * 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 = (struct ei_device *) dev->priv;
- unsigned long flags;
-
- /* If the card is stopped, just return the present stats. */
- if (!netif_running(dev))
- return &ei_local->stat;
- spin_lock_irqsave(&ei_local->page_lock,flags);
- /* Read the counter registers, assuming we are in page 0. */
- ei_local->stat.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
- ei_local->stat.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
- ei_local->stat.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
- spin_unlock_irqrestore(&ei_local->page_lock, flags);
-
- return &ei_local->stat;
- }
- /**
- * 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. May be called
- * from a BH in 2.1.x. Must be called with lock held.
- */
-
- static void do_set_multicast_list(struct net_device *dev)
- {
- long e8390_base = dev->base_addr;
- if(dev->flags&IFF_PROMISC)
- outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR);
- else if(dev->flags&IFF_ALLMULTI || dev->mc_list)
- outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR);
- else
- outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR);
- }
- /*
- * 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
- */
- #define dev_lock(dev) (((struct ei_device *)(dev)->priv)->page_lock)
- 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);
- }
- /**
- * axdev_init - init rest of 8390 device struct
- * @dev: network device structure to init
- *
- * Initialize the rest of the 8390 device structure. Do NOT __init
- * this, as it is used by 8390 based modular drivers too.
- */
- static int axdev_init(struct net_device *dev)
- {
- if (ei_debug > 1)
- printk(version_8390);
-
- if (dev->priv == NULL)
- {
- struct ei_device *ei_local;
-
- dev->priv = kmalloc(sizeof(struct ei_device), GFP_KERNEL);
- if (dev->priv == NULL)
- return -ENOMEM;
- memset(dev->priv, 0, sizeof(struct ei_device));
- ei_local = (struct ei_device *)dev->priv;
- spin_lock_init(&ei_local->page_lock);
- }
-
- dev->hard_start_xmit = &ei_start_xmit;
- dev->get_stats = get_stats;
- dev->set_multicast_list = &set_multicast_list;
- ether_setup(dev);
-
- return 0;
- }
- /* 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)
- {
- axnet_dev_t *info = (axnet_dev_t *)dev;
- long e8390_base = dev->base_addr;
- struct ei_device *ei_local = (struct ei_device *) dev->priv;
- int i;
- int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
-
- if(sizeof(struct e8390_pkt_hdr)!=4)
- panic("8390.c: header struct mispackedn");
- /* 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])
- printk(KERN_ERR "Hw. address read/write mismap %dn",i);
- }
- /*
- * Initialize the multicast list to accept-all. If we enable multicast
- * the higher levels can do the filtering.
- */
- for (i = 0; i < 8; i++)
- outb_p(0xff, e8390_base + EN1_MULT + 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 (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)) = (struct ei_device *) dev->priv;
-
- if (inb_p(e8390_base) & E8390_TRANS)
- {
- printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.n",
- dev->name);
- 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);
- }