diff options
Diffstat (limited to 'drivers/net/fmv18x.c')
| -rw-r--r-- | drivers/net/fmv18x.c | 689 |
1 files changed, 689 insertions, 0 deletions
diff --git a/drivers/net/fmv18x.c b/drivers/net/fmv18x.c new file mode 100644 index 00000000000..04c74852347 --- /dev/null +++ b/drivers/net/fmv18x.c @@ -0,0 +1,689 @@ +/* fmv18x.c: A network device driver for the Fujitsu FMV-181/182/183/184. + + Original: at1700.c (1993-94 by Donald Becker). + Copyright 1993 United States Government as represented by the + Director, National Security Agency. + The author may be reached as becker@scyld.com, or C/O + Scyld Computing Corporation + 410 Severn Ave., Suite 210 + Annapolis MD 21403 + + Modified by Yutaka TAMIYA (tamy@flab.fujitsu.co.jp) + Copyright 1994 Fujitsu Laboratories Ltd. + Special thanks to: + Masayoshi UTAKA (utaka@ace.yk.fujitsu.co.jp) + for testing this driver. + H. NEGISHI (agy, negishi@sun45.psd.cs.fujitsu.co.jp) + for suggestion of some program modification. + Masahiro SEKIGUCHI <seki@sysrap.cs.fujitsu.co.jp> + for suggestion of some program modification. + Kazutoshi MORIOKA (morioka@aurora.oaks.cs.fujitsu.co.jp) + for testing this driver. + + This software may be used and distributed according to the terms + of the GNU General Public License, incorporated herein by reference. + + This is a device driver for the Fujitsu FMV-181/182/183/184, which + is a straight-forward Fujitsu MB86965 implementation. + + Sources: + at1700.c + The Fujitsu MB86965 datasheet. + The Fujitsu FMV-181/182 user's guide +*/ + +static const char version[] = + "fmv18x.c:v2.2.0 09/24/98 Yutaka TAMIYA (tamy@flab.fujitsu.co.jp)\n"; + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/fcntl.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/in.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/spinlock.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/delay.h> +#include <linux/bitops.h> + +#include <asm/system.h> +#include <asm/io.h> +#include <asm/dma.h> + +#define DRV_NAME "fmv18x" + +static unsigned fmv18x_probe_list[] __initdata = { + 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x300, 0x340, 0 +}; + +/* use 0 for production, 1 for verification, >2 for debug */ +#ifndef NET_DEBUG +#define NET_DEBUG 1 +#endif +static unsigned int net_debug = NET_DEBUG; + +typedef unsigned char uchar; + +/* Information that need to be kept for each board. */ +struct net_local { + struct net_device_stats stats; + long open_time; /* Useless example local info. */ + uint tx_started:1; /* Number of packet on the Tx queue. */ + uint tx_queue_ready:1; /* Tx queue is ready to be sent. */ + uint rx_started:1; /* Packets are Rxing. */ + uchar tx_queue; /* Number of packet on the Tx queue. */ + ushort tx_queue_len; /* Current length of the Tx queue. */ + spinlock_t lock; +}; + + +/* Offsets from the base address. */ +#define STATUS 0 +#define TX_STATUS 0 +#define RX_STATUS 1 +#define TX_INTR 2 /* Bit-mapped interrupt enable registers. */ +#define RX_INTR 3 +#define TX_MODE 4 +#define RX_MODE 5 +#define CONFIG_0 6 /* Misc. configuration settings. */ +#define CONFIG_1 7 +/* Run-time register bank 2 definitions. */ +#define DATAPORT 8 /* Word-wide DMA or programmed-I/O dataport. */ +#define TX_START 10 +#define COL16CNTL 11 /* Controll Reg for 16 collisions */ +#define MODE13 13 +/* Fujitsu FMV-18x Card Configuration */ +#define FJ_STATUS0 0x10 +#define FJ_STATUS1 0x11 +#define FJ_CONFIG0 0x12 +#define FJ_CONFIG1 0x13 +#define FJ_MACADDR 0x14 /* 0x14 - 0x19 */ +#define FJ_BUFCNTL 0x1A +#define FJ_BUFDATA 0x1C +#define FMV18X_IO_EXTENT 32 + +/* Index to functions, as function prototypes. */ + +static int fmv18x_probe1(struct net_device *dev, short ioaddr); +static int net_open(struct net_device *dev); +static int net_send_packet(struct sk_buff *skb, struct net_device *dev); +static irqreturn_t net_interrupt(int irq, void *dev_id, struct pt_regs *regs); +static void net_rx(struct net_device *dev); +static void net_timeout(struct net_device *dev); +static int net_close(struct net_device *dev); +static struct net_device_stats *net_get_stats(struct net_device *dev); +static void set_multicast_list(struct net_device *dev); + + +/* Check for a network adaptor of this type, and return '0' iff one exists. + If dev->base_addr == 0, probe all likely locations. + If dev->base_addr == 1, always return failure. + If dev->base_addr == 2, allocate space for the device and return success + (detachable devices only). + */ + +static int io = 0x220; +static int irq; + +struct net_device * __init fmv18x_probe(int unit) +{ + struct net_device *dev = alloc_etherdev(sizeof(struct net_local)); + unsigned *port; + int err = 0; + + if (!dev) + return ERR_PTR(-ENODEV); + + if (unit >= 0) { + sprintf(dev->name, "eth%d", unit); + netdev_boot_setup_check(dev); + io = dev->base_addr; + irq = dev->irq; + } + + SET_MODULE_OWNER(dev); + + if (io > 0x1ff) { /* Check a single specified location. */ + err = fmv18x_probe1(dev, io); + } else if (io != 0) { /* Don't probe at all. */ + err = -ENXIO; + } else { + for (port = fmv18x_probe_list; *port; port++) + if (fmv18x_probe1(dev, *port) == 0) + break; + if (!*port) + err = -ENODEV; + } + if (err) + goto out; + err = register_netdev(dev); + if (err) + goto out1; + return dev; +out1: + free_irq(dev->irq, dev); + release_region(dev->base_addr, FMV18X_IO_EXTENT); +out: + free_netdev(dev); + return ERR_PTR(err); +} + +/* The Fujitsu datasheet suggests that the NIC be probed for by checking its + "signature", the default bit pattern after a reset. This *doesn't* work -- + there is no way to reset the bus interface without a complete power-cycle! + + It turns out that ATI came to the same conclusion I did: the only thing + that can be done is checking a few bits and then diving right into MAC + address check. */ + +static int __init fmv18x_probe1(struct net_device *dev, short ioaddr) +{ + char irqmap[4] = {3, 7, 10, 15}; + char irqmap_pnp[8] = {3, 4, 5, 7, 9, 10, 11, 15}; + unsigned int i, retval; + struct net_local *lp; + + /* Resetting the chip doesn't reset the ISA interface, so don't bother. + That means we have to be careful with the register values we probe for. + */ + + if (!request_region(ioaddr, FMV18X_IO_EXTENT, DRV_NAME)) + return -EBUSY; + + dev->irq = irq; + dev->base_addr = ioaddr; + + /* Check I/O address configuration and Fujitsu vendor code */ + if (inb(ioaddr+FJ_MACADDR ) != 0x00 + || inb(ioaddr+FJ_MACADDR+1) != 0x00 + || inb(ioaddr+FJ_MACADDR+2) != 0x0e) { + retval = -ENODEV; + goto out; + } + + /* Check PnP mode for FMV-183/184/183A/184A. */ + /* This PnP routine is very poor. IO and IRQ should be known. */ + if (inb(ioaddr + FJ_STATUS1) & 0x20) { + for (i = 0; i < 8; i++) { + if (dev->irq == irqmap_pnp[i]) + break; + } + if (i == 8) { + retval = -ENODEV; + goto out; + } + } else { + if (fmv18x_probe_list[inb(ioaddr + FJ_CONFIG0) & 0x07] != ioaddr) + return -ENODEV; + dev->irq = irqmap[(inb(ioaddr + FJ_CONFIG0)>>6) & 0x03]; + } + + /* Snarf the interrupt vector now. */ + retval = request_irq(dev->irq, &net_interrupt, 0, DRV_NAME, dev); + if (retval) { + printk ("FMV-18x found at %#3x, but it's unusable due to a conflict on" + "IRQ %d.\n", ioaddr, dev->irq); + goto out; + } + + printk("%s: FMV-18x found at %#3x, IRQ %d, address ", dev->name, + ioaddr, dev->irq); + + for(i = 0; i < 6; i++) { + unsigned char val = inb(ioaddr + FJ_MACADDR + i); + printk("%02x", val); + dev->dev_addr[i] = val; + } + + /* "FJ_STATUS0" 12 bit 0x0400 means use regular 100 ohm 10baseT signals, + rather than 150 ohm shielded twisted pair compensation. + 0x0000 == auto-sense the interface + 0x0800 == use TP interface + 0x1800 == use coax interface + */ + { + const char *porttype[] = {"auto-sense", "10baseT", "auto-sense", "10base2/5"}; + ushort setup_value = inb(ioaddr + FJ_STATUS0); + + switch( setup_value & 0x07 ){ + case 0x01 /* 10base5 */: + case 0x02 /* 10base2 */: dev->if_port = 0x18; break; + case 0x04 /* 10baseT */: dev->if_port = 0x08; break; + default /* auto-sense*/: dev->if_port = 0x00; break; + } + printk(" %s interface.\n", porttype[(dev->if_port>>3) & 3]); + } + + /* Initialize LAN Controller and LAN Card */ + outb(0xda, ioaddr + CONFIG_0); /* Initialize LAN Controller */ + outb(0x00, ioaddr + CONFIG_1); /* Stand by mode */ + outb(0x00, ioaddr + FJ_CONFIG1); /* Disable IRQ of LAN Card */ + outb(0x00, ioaddr + FJ_BUFCNTL); /* Reset ? I'm not sure (TAMIYA) */ + + /* wait for a while */ + udelay(200); + + /* Set the station address in bank zero. */ + outb(0x00, ioaddr + CONFIG_1); + for (i = 0; i < 6; i++) + outb(dev->dev_addr[i], ioaddr + 8 + i); + + /* Switch to bank 1 and set the multicast table to accept none. */ + outb(0x04, ioaddr + CONFIG_1); + for (i = 0; i < 8; i++) + outb(0x00, ioaddr + 8 + i); + + /* Switch to bank 2 and lock our I/O address. */ + outb(0x08, ioaddr + CONFIG_1); + outb(dev->if_port, ioaddr + MODE13); + outb(0x00, ioaddr + COL16CNTL); + + if (net_debug) + printk(version); + + /* Initialize the device structure. */ + dev->priv = kmalloc(sizeof(struct net_local), GFP_KERNEL); + if (!dev->priv) { + retval = -ENOMEM; + goto out_irq; + } + memset(dev->priv, 0, sizeof(struct net_local)); + lp = dev->priv; + spin_lock_init(&lp->lock); + + dev->open = net_open; + dev->stop = net_close; + dev->hard_start_xmit = net_send_packet; + dev->tx_timeout = net_timeout; + dev->watchdog_timeo = HZ/10; + dev->get_stats = net_get_stats; + dev->set_multicast_list = set_multicast_list; + return 0; + +out_irq: + free_irq(dev->irq, dev); +out: + release_region(ioaddr, FMV18X_IO_EXTENT); + return retval; +} + + +static int net_open(struct net_device *dev) +{ + struct net_local *lp = dev->priv; + int ioaddr = dev->base_addr; + + /* Set the configuration register 0 to 32K 100ns. byte-wide memory, + 16 bit bus access, and two 4K Tx, enable the Rx and Tx. */ + outb(0x5a, ioaddr + CONFIG_0); + + /* Powerup and switch to register bank 2 for the run-time registers. */ + outb(0xe8, ioaddr + CONFIG_1); + + lp->tx_started = 0; + lp->tx_queue_ready = 1; + lp->rx_started = 0; + lp->tx_queue = 0; + lp->tx_queue_len = 0; + + /* Clear Tx and Rx Status */ + outb(0xff, ioaddr + TX_STATUS); + outb(0xff, ioaddr + RX_STATUS); + lp->open_time = jiffies; + + netif_start_queue(dev); + + /* Enable the IRQ of the LAN Card */ + outb(0x80, ioaddr + FJ_CONFIG1); + + /* Enable both Tx and Rx interrupts */ + outw(0x8182, ioaddr+TX_INTR); + + return 0; +} + +static void net_timeout(struct net_device *dev) +{ + struct net_local *lp = dev->priv; + int ioaddr = dev->base_addr; + unsigned long flags; + + + printk(KERN_WARNING "%s: transmit timed out with status %04x, %s?\n", dev->name, + htons(inw(ioaddr + TX_STATUS)), + inb(ioaddr + TX_STATUS) & 0x80 + ? "IRQ conflict" : "network cable problem"); + printk(KERN_WARNING "%s: timeout registers: %04x %04x %04x %04x %04x %04x %04x %04x.\n", + dev->name, htons(inw(ioaddr + 0)), + htons(inw(ioaddr + 2)), htons(inw(ioaddr + 4)), + htons(inw(ioaddr + 6)), htons(inw(ioaddr + 8)), + htons(inw(ioaddr +10)), htons(inw(ioaddr +12)), + htons(inw(ioaddr +14))); + printk(KERN_WARNING "eth card: %04x %04x\n", + htons(inw(ioaddr+FJ_STATUS0)), + htons(inw(ioaddr+FJ_CONFIG0))); + lp->stats.tx_errors++; + /* ToDo: We should try to restart the adaptor... */ + spin_lock_irqsave(&lp->lock, flags); + + /* Initialize LAN Controller and LAN Card */ + outb(0xda, ioaddr + CONFIG_0); /* Initialize LAN Controller */ + outb(0x00, ioaddr + CONFIG_1); /* Stand by mode */ + outb(0x00, ioaddr + FJ_CONFIG1); /* Disable IRQ of LAN Card */ + outb(0x00, ioaddr + FJ_BUFCNTL); /* Reset ? I'm not sure */ + net_open(dev); + spin_unlock_irqrestore(&lp->lock, flags); + + netif_wake_queue(dev); +} + +static int net_send_packet(struct sk_buff *skb, struct net_device *dev) +{ + struct net_local *lp = dev->priv; + int ioaddr = dev->base_addr; + short length = skb->len; + unsigned char *buf; + unsigned long flags; + + /* Block a transmit from overlapping. */ + + if (length > ETH_FRAME_LEN) { + if (net_debug) + printk("%s: Attempting to send a large packet (%d bytes).\n", + dev->name, length); + return 1; + } + + if (length < ETH_ZLEN) { + skb = skb_padto(skb, ETH_ZLEN); + if (skb == NULL) + return 0; + length = ETH_ZLEN; + } + buf = skb->data; + + if (net_debug > 4) + printk("%s: Transmitting a packet of length %lu.\n", dev->name, + (unsigned long)skb->len); + /* We may not start transmitting unless we finish transferring + a packet into the Tx queue. During executing the following + codes we possibly catch a Tx interrupt. Thus we flag off + tx_queue_ready, so that we prevent the interrupt routine + (net_interrupt) to start transmitting. */ + spin_lock_irqsave(&lp->lock, flags); + lp->tx_queue_ready = 0; + { + outw(length, ioaddr + DATAPORT); + outsw(ioaddr + DATAPORT, buf, (length + 1) >> 1); + lp->tx_queue++; + lp->tx_queue_len += length + 2; + } + lp->tx_queue_ready = 1; + spin_unlock_irqrestore(&lp->lock, flags); + + if (lp->tx_started == 0) { + /* If the Tx is idle, always trigger a transmit. */ + outb(0x80 | lp->tx_queue, ioaddr + TX_START); + lp->tx_queue = 0; + lp->tx_queue_len = 0; + dev->trans_start = jiffies; + lp->tx_started = 1; + } else if (lp->tx_queue_len >= 4096 - 1502) /* No room for a packet */ + netif_stop_queue(dev); + + dev_kfree_skb(skb); + return 0; +} + +/* The typical workload of the driver: + Handle the network interface interrupts. */ +static irqreturn_t +net_interrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + struct net_device *dev = dev_id; + struct net_local *lp; + int ioaddr, status; + + ioaddr = dev->base_addr; + lp = dev->priv; + status = inw(ioaddr + TX_STATUS); + outw(status, ioaddr + TX_STATUS); + + if (net_debug > 4) + printk("%s: Interrupt with status %04x.\n", dev->name, status); + if (lp->rx_started == 0 && + (status & 0xff00 || (inb(ioaddr + RX_MODE) & 0x40) == 0)) { + /* Got a packet(s). + We cannot execute net_rx more than once at the same time for + the same device. During executing net_rx, we possibly catch a + Tx interrupt. Thus we flag on rx_started, so that we prevent + the interrupt routine (net_interrupt) to dive into net_rx + again. */ + lp->rx_started = 1; + outb(0x00, ioaddr + RX_INTR); /* Disable RX intr. */ + net_rx(dev); + outb(0x81, ioaddr + RX_INTR); /* Enable RX intr. */ + lp->rx_started = 0; + } + if (status & 0x00ff) { + if (status & 0x02) { + /* More than 16 collisions occurred */ + if (net_debug > 4) + printk("%s: 16 Collision occur during Txing.\n", dev->name); + /* Cancel sending a packet. */ + outb(0x03, ioaddr + COL16CNTL); + lp->stats.collisions++; + } + if (status & 0x82) { + spin_lock(&lp->lock); + lp->stats.tx_packets++; + if (lp->tx_queue && lp->tx_queue_ready) { + outb(0x80 | lp->tx_queue, ioaddr + TX_START); + lp->tx_queue = 0; + lp->tx_queue_len = 0; + dev->trans_start = jiffies; + netif_wake_queue(dev); /* Inform upper layers. */ + } else { + lp->tx_started = 0; + netif_wake_queue(dev); /* Inform upper layers. */ + } + spin_unlock(&lp->lock); + } + } + return IRQ_RETVAL(status); +} + +/* We have a good packet(s), get it/them out of the buffers. */ +static void net_rx(struct net_device *dev) +{ + struct net_local *lp = dev->priv; + int ioaddr = dev->base_addr; + int boguscount = 5; + + while ((inb(ioaddr + RX_MODE) & 0x40) == 0) { + /* Clear PKT_RDY bit: by agy 19940922 */ + /* outb(0x80, ioaddr + RX_STATUS); */ + ushort status = inw(ioaddr + DATAPORT); + + if (net_debug > 4) + printk("%s: Rxing packet mode %02x status %04x.\n", + dev->name, inb(ioaddr + RX_MODE), status); +#ifndef final_version + if (status == 0) { + outb(0x05, ioaddr + 14); + break; + } +#endif + + if ((status & 0xF0) != 0x20) { /* There was an error. */ + lp->stats.rx_errors++; + if (status & 0x08) lp->stats.rx_length_errors++; + if (status & 0x04) lp->stats.rx_frame_errors++; + if (status & 0x02) lp->stats.rx_crc_errors++; + if (status & 0x01) lp->stats.rx_over_errors++; + } else { + ushort pkt_len = inw(ioaddr + DATAPORT); + /* Malloc up new buffer. */ + struct sk_buff *skb; + + if (pkt_len > 1550) { + printk("%s: The FMV-18x claimed a very large packet, size %d.\n", + dev->name, pkt_len); + outb(0x05, ioaddr + 14); + lp->stats.rx_errors++; + break; + } + skb = dev_alloc_skb(pkt_len+3); + if (skb == NULL) { + printk("%s: Memory squeeze, dropping packet (len %d).\n", + dev->name, pkt_len); + outb(0x05, ioaddr + 14); + lp->stats.rx_dropped++; + break; + } + skb->dev = dev; + skb_reserve(skb,2); + + insw(ioaddr + DATAPORT, skb_put(skb,pkt_len), (pkt_len + 1) >> 1); + + if (net_debug > 5) { + int i; + printk("%s: Rxed packet of length %d: ", dev->name, pkt_len); + for (i = 0; i < 14; i++) + printk(" %02x", skb->data[i]); + printk(".\n"); + } + + skb->protocol=eth_type_trans(skb, dev); + netif_rx(skb); + dev->last_rx = jiffies; + lp->stats.rx_packets++; + lp->stats.rx_bytes += pkt_len; + } + if (--boguscount <= 0) + break; + } + + /* If any worth-while packets have been received, dev_rint() + has done a mark_bh(NET_BH) for us and will work on them + when we get to the bottom-half routine. */ + { + int i; + for (i = 0; i < 20; i++) { + if ((inb(ioaddr + RX_MODE) & 0x40) == 0x40) + break; + (void)inw(ioaddr + DATAPORT); /* dummy status read */ + outb(0x05, ioaddr + 14); + } + + if (net_debug > 5 && i > 0) + printk("%s: Exint Rx packet with mode %02x after %d ticks.\n", + dev->name, inb(ioaddr + RX_MODE), i); + } + + return; +} + +/* The inverse routine to net_open(). */ +static int net_close(struct net_device *dev) +{ + int ioaddr = dev->base_addr; + + ((struct net_local *)dev->priv)->open_time = 0; + + netif_stop_queue(dev); + + /* Set configuration register 0 to disable Tx and Rx. */ + outb(0xda, ioaddr + CONFIG_0); + + /* Update the statistics -- ToDo. */ + + /* Power-down the chip. Green, green, green! */ + outb(0x00, ioaddr + CONFIG_1); + + /* Set the ethernet adaptor disable IRQ */ + outb(0x00, ioaddr + FJ_CONFIG1); + + return 0; +} + +/* Get the current statistics. This may be called with the card open or + closed. */ +static struct net_device_stats *net_get_stats(struct net_device *dev) +{ + struct net_local *lp = dev->priv; + return &lp->stats; +} + +/* Set or clear the multicast filter for this adaptor. + num_addrs == -1 Promiscuous mode, receive all packets + num_addrs == 0 Normal mode, clear multicast list + num_addrs > 0 Multicast mode, receive normal and MC packets, and do + best-effort filtering. + */ + +static void set_multicast_list(struct net_device *dev) +{ + short ioaddr = dev->base_addr; + if (dev->mc_count || dev->flags&(IFF_PROMISC|IFF_ALLMULTI)) + { + /* + * We must make the kernel realise we had to move + * into promisc mode or we start all out war on + * the cable. - AC + */ + dev->flags|=IFF_PROMISC; + + outb(3, ioaddr + RX_MODE); /* Enable promiscuous mode */ + } + else + outb(2, ioaddr + RX_MODE); /* Disable promiscuous, use normal mode */ +} + +#ifdef MODULE +static struct net_device *dev_fmv18x; + +MODULE_PARM(io, "i"); +MODULE_PARM(irq, "i"); +MODULE_PARM(net_debug, "i"); +MODULE_PARM_DESC(io, "FMV-18X I/O address"); +MODULE_PARM_DESC(irq, "FMV-18X IRQ number"); +MODULE_PARM_DESC(net_debug, "FMV-18X debug level (0-1,5-6)"); +MODULE_LICENSE("GPL"); + +int init_module(void) +{ + if (io == 0) + printk("fmv18x: You should not use auto-probing with insmod!\n"); + dev_fmv18x = fmv18x_probe(-1); + if (IS_ERR(dev_fmv18x)) + return PTR_ERR(dev_fmv18x); + return 0; +} + +void +cleanup_module(void) +{ + unregister_netdev(dev_fmv18x); + free_irq(dev_fmv18x->irq, dev_fmv18x); + release_region(dev_fmv18x->base_addr, FMV18X_IO_EXTENT); + free_netdev(dev_fmv18x); +} +#endif /* MODULE */ + +/* + * Local variables: + * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c fmv18x.c" + * version-control: t + * kept-new-versions: 5 + * tab-width: 4 + * c-indent-level: 4 + * End: + */ |