catc.c
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上传日期:2013-02-24
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- /*
- * Copyright (c) 2001 Vojtech Pavlik
- *
- * CATC EL1210A NetMate USB Ethernet driver
- *
- * Sponsored by SuSE
- *
- * Based on the work of
- * Donald Becker
- */
- /*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Should you need to contact me, the author, you can do so either by
- * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
- * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
- */
- #include <linux/init.h>
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <linux/slab.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/skbuff.h>
- #include <linux/spinlock.h>
- #include <asm/bitops.h>
- #undef DEBUG
- #include <linux/usb.h>
- /*
- * Version information.
- */
- #define DRIVER_VERSION "v2.7"
- #define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@suse.cz>"
- #define DRIVER_DESC "CATC EL1210A NetMate USB Ethernet driver"
- MODULE_AUTHOR(DRIVER_AUTHOR);
- MODULE_DESCRIPTION(DRIVER_DESC);
- MODULE_LICENSE("GPL");
- /*
- * Some defines.
- */
- #define STATS_UPDATE (HZ) /* Time between stats updates */
- #define TX_TIMEOUT (5*HZ) /* Max time the queue can be stopped */
- #define PKT_SZ 1536 /* Max Ethernet packet size */
- #define RX_MAX_BURST 15 /* Max packets per rx buffer (> 0, < 16) */
- #define TX_MAX_BURST 15 /* Max full sized packets per tx buffer (> 0) */
- #define CTRL_QUEUE 16 /* Max control requests in flight (power of two) */
- /*
- * Control requests.
- */
- enum control_requests {
- ReadMem = 0xf1,
- GetMac = 0xf2,
- Reset = 0xf4,
- SetMac = 0xf5,
- WriteROM = 0xf8,
- SetReg = 0xfa,
- GetReg = 0xfb,
- WriteMem = 0xfc,
- ReadROM = 0xfd,
- };
- /*
- * Registers.
- */
- enum register_offsets {
- TxBufCount = 0x20,
- RxBufCount = 0x21,
- OpModes = 0x22,
- TxQed = 0x23,
- RxQed = 0x24,
- MaxBurst = 0x25,
- RxUnit = 0x60,
- EthStatus = 0x61,
- StationAddr0 = 0x67,
- EthStats = 0x69,
- LEDCtrl = 0x81,
- };
- enum eth_stats {
- TxSingleColl = 0x00,
- TxMultiColl = 0x02,
- TxExcessColl = 0x04,
- RxFramErr = 0x06,
- };
- enum op_mode_bits {
- Op3MemWaits = 0x03,
- OpLenInclude = 0x08,
- OpRxMerge = 0x10,
- OpTxMerge = 0x20,
- OpWin95bugfix = 0x40,
- OpLoopback = 0x80,
- };
- enum rx_filter_bits {
- RxEnable = 0x01,
- RxPolarity = 0x02,
- RxForceOK = 0x04,
- RxMultiCast = 0x08,
- RxPromisc = 0x10,
- };
- enum led_values {
- LEDFast = 0x01,
- LEDSlow = 0x02,
- LEDFlash = 0x03,
- LEDPulse = 0x04,
- LEDLink = 0x08,
- };
- /*
- * The catc struct.
- */
- #define CTRL_RUNNING 0
- #define RX_RUNNING 1
- #define TX_RUNNING 2
- struct catc {
- struct net_device *netdev;
- struct usb_device *usbdev;
- struct net_device_stats stats;
- unsigned long flags;
- unsigned int tx_ptr, tx_idx;
- unsigned int ctrl_head, ctrl_tail;
- spinlock_t tx_lock, ctrl_lock;
- u8 tx_buf[2][TX_MAX_BURST * (PKT_SZ + 2)];
- u8 rx_buf[RX_MAX_BURST * (PKT_SZ + 2)];
- u8 irq_buf[2];
- u8 ctrl_buf[64];
- devrequest ctrl_dr;
- struct timer_list timer;
- u8 stats_buf[8];
- u16 stats_vals[4];
- unsigned long last_stats;
- u8 multicast[64];
- struct ctrl_queue {
- u8 dir;
- u8 request;
- u16 value;
- u16 index;
- void *buf;
- int len;
- void (*callback)(struct catc *catc, struct ctrl_queue *q);
- } ctrl_queue[CTRL_QUEUE];
- struct urb tx_urb, rx_urb, irq_urb, ctrl_urb;
- };
- /*
- * Useful macros.
- */
- #define catc_get_mac(catc, mac) catc_ctrl_msg(catc, USB_DIR_IN, GetMac, 0, 0, mac, 6)
- #define catc_reset(catc) catc_ctrl_msg(catc, USB_DIR_OUT, Reset, 0, 0, NULL, 0)
- #define catc_set_reg(catc, reg, val) catc_ctrl_msg(catc, USB_DIR_OUT, SetReg, val, reg, NULL, 0)
- #define catc_get_reg(catc, reg, buf) catc_ctrl_msg(catc, USB_DIR_IN, GetReg, 0, reg, buf, 1)
- #define catc_write_mem(catc, addr, buf, size) catc_ctrl_msg(catc, USB_DIR_OUT, WriteMem, 0, addr, buf, size)
- #define catc_read_mem(catc, addr, buf, size) catc_ctrl_msg(catc, USB_DIR_IN, ReadMem, 0, addr, buf, size)
- #define catc_set_reg_async(catc, reg, val) catc_ctrl_async(catc, USB_DIR_OUT, SetReg, val, reg, NULL, 0, NULL)
- #define catc_get_reg_async(catc, reg, cb) catc_ctrl_async(catc, USB_DIR_IN, GetReg, 0, reg, NULL, 1, cb)
- #define catc_write_mem_async(catc, addr, buf, size) catc_ctrl_async(catc, USB_DIR_OUT, WriteMem, 0, addr, buf, size, NULL)
- /*
- * Receive routines.
- */
- static void catc_rx_done(struct urb *urb)
- {
- struct catc *catc = urb->context;
- u8 *pkt_start = urb->transfer_buffer;
- struct sk_buff *skb;
- int pkt_len;
- clear_bit(RX_RUNNING, &catc->flags);
- if (urb->status) {
- dbg("rx_done, status %d, length %d", urb->status, urb->actual_length);
- return;
- }
- do {
- pkt_len = le16_to_cpup((u16*)pkt_start);
- if (pkt_len > urb->actual_length) {
- catc->stats.rx_length_errors++;
- catc->stats.rx_errors++;
- break;
- }
- if (!(skb = dev_alloc_skb(pkt_len)))
- return;
- skb->dev = catc->netdev;
- eth_copy_and_sum(skb, pkt_start + 2, pkt_len, 0);
- skb_put(skb, pkt_len);
- skb->protocol = eth_type_trans(skb, catc->netdev);
- netif_rx(skb);
- catc->stats.rx_packets++;
- catc->stats.rx_bytes += pkt_len;
- pkt_start += (((pkt_len + 1) >> 6) + 1) << 6;
- } while (pkt_start - (u8 *) urb->transfer_buffer < urb->actual_length);
- catc->netdev->last_rx = jiffies;
- }
- static void catc_irq_done(struct urb *urb)
- {
- struct catc *catc = urb->context;
- u8 *data = urb->transfer_buffer;
- int status;
- if (urb->status) {
- dbg("irq_done, status %d, data %02x %02x.", urb->status, data[0], data[1]);
- return;
- }
- if ((data[1] & 0x80) && !test_and_set_bit(RX_RUNNING, &catc->flags)) {
- catc->rx_urb.dev = catc->usbdev;
- if ((status = usb_submit_urb(&catc->rx_urb)) < 0) {
- err("submit(rx_urb) status %d", status);
- return;
- }
- }
- if (data[1] & 0x40)
- dbg("link ok");
- if (data[1] & 0x20)
- dbg("link bad");
- }
- /*
- * Transmit routines.
- */
- static void catc_tx_run(struct catc *catc)
- {
- int status;
- catc->tx_urb.transfer_buffer_length = catc->tx_ptr;
- catc->tx_urb.transfer_buffer = catc->tx_buf[catc->tx_idx];
- catc->tx_urb.dev = catc->usbdev;
- if ((status = usb_submit_urb(&catc->tx_urb)) < 0)
- err("submit(tx_urb), status %d", status);
- catc->tx_idx = !catc->tx_idx;
- catc->tx_ptr = 0;
- catc->netdev->trans_start = jiffies;
- }
- static void catc_tx_done(struct urb *urb)
- {
- struct catc *catc = urb->context;
- unsigned long flags;
- if (urb->status == -ECONNRESET) {
- dbg("Tx Reset.");
- urb->transfer_flags &= ~USB_ASYNC_UNLINK;
- urb->status = 0;
- catc->netdev->trans_start = jiffies;
- catc->stats.tx_errors++;
- clear_bit(TX_RUNNING, &catc->flags);
- netif_wake_queue(catc->netdev);
- return;
- }
- if (urb->status) {
- dbg("tx_done, status %d, length %d", urb->status, urb->actual_length);
- return;
- }
- spin_lock_irqsave(&catc->tx_lock, flags);
- if (catc->tx_ptr)
- catc_tx_run(catc);
- else
- clear_bit(TX_RUNNING, &catc->flags);
- netif_wake_queue(catc->netdev);
- spin_unlock_irqrestore(&catc->tx_lock, flags);
- }
- static int catc_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev)
- {
- struct catc *catc = netdev->priv;
- unsigned long flags;
- char *tx_buf;
- spin_lock_irqsave(&catc->tx_lock, flags);
- catc->tx_ptr = (((catc->tx_ptr - 1) >> 6) + 1) << 6;
- tx_buf = catc->tx_buf[catc->tx_idx] + catc->tx_ptr;
- *((u16*)tx_buf) = cpu_to_le16((u16)skb->len);
- memcpy(tx_buf + 2, skb->data, skb->len);
- catc->tx_ptr += skb->len + 2;
- if (!test_and_set_bit(TX_RUNNING, &catc->flags))
- catc_tx_run(catc);
- if (catc->tx_ptr >= ((TX_MAX_BURST - 1) * (PKT_SZ + 2)))
- netif_stop_queue(netdev);
- spin_unlock_irqrestore(&catc->tx_lock, flags);
- catc->stats.tx_bytes += skb->len;
- catc->stats.tx_packets++;
- dev_kfree_skb(skb);
- return 0;
- }
- static void catc_tx_timeout(struct net_device *netdev)
- {
- struct catc *catc = netdev->priv;
- warn("Transmit timed out.");
- catc->tx_urb.transfer_flags |= USB_ASYNC_UNLINK;
- usb_unlink_urb(&catc->tx_urb);
- }
- /*
- * Control messages.
- */
- static int catc_ctrl_msg(struct catc *catc, u8 dir, u8 request, u16 value, u16 index, void *buf, int len)
- {
- int retval = usb_control_msg(catc->usbdev,
- dir ? usb_rcvctrlpipe(catc->usbdev, 0) : usb_sndctrlpipe(catc->usbdev, 0),
- request, 0x40 | dir, value, index, buf, len, HZ);
- return retval < 0 ? retval : 0;
- }
- static void catc_ctrl_run(struct catc *catc)
- {
- struct ctrl_queue *q = catc->ctrl_queue + catc->ctrl_tail;
- struct usb_device *usbdev = catc->usbdev;
- struct urb *urb = &catc->ctrl_urb;
- devrequest *dr = &catc->ctrl_dr;
- int status;
- dr->request = q->request;
- dr->requesttype = 0x40 | q->dir;
- dr->value = cpu_to_le16(q->value);
- dr->index = cpu_to_le16(q->index);
- dr->length = cpu_to_le16(q->len);
- urb->pipe = q->dir ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0);
- urb->transfer_buffer_length = q->len;
- urb->transfer_buffer = catc->ctrl_buf;
- urb->setup_packet = (void *) dr;
- urb->dev = usbdev;
- if (!q->dir && q->buf && q->len)
- memcpy(catc->ctrl_buf, q->buf, q->len);
- if ((status = usb_submit_urb(&catc->ctrl_urb)))
- err("submit(ctrl_urb) status %d", status);
- }
- static void catc_ctrl_done(struct urb *urb)
- {
- struct catc *catc = urb->context;
- struct ctrl_queue *q;
- long flags;
- if (urb->status)
- dbg("ctrl_done, status %d, len %d.", urb->status, urb->actual_length);
- spin_lock_irqsave(&catc->ctrl_lock, flags);
- q = catc->ctrl_queue + catc->ctrl_tail;
- if (q->dir) {
- if (q->buf && q->len)
- memcpy(q->buf, catc->ctrl_buf, q->len);
- else
- q->buf = catc->ctrl_buf;
- }
- if (q->callback)
- q->callback(catc, q);
- catc->ctrl_tail = (catc->ctrl_tail + 1) & (CTRL_QUEUE - 1);
- if (catc->ctrl_head != catc->ctrl_tail)
- catc_ctrl_run(catc);
- else
- clear_bit(CTRL_RUNNING, &catc->flags);
- spin_unlock_irqrestore(&catc->ctrl_lock, flags);
- }
- static int catc_ctrl_async(struct catc *catc, u8 dir, u8 request, u16 value,
- u16 index, void *buf, int len, void (*callback)(struct catc *catc, struct ctrl_queue *q))
- {
- struct ctrl_queue *q;
- int retval = 0;
- long flags;
- spin_lock_irqsave(&catc->ctrl_lock, flags);
-
- q = catc->ctrl_queue + catc->ctrl_head;
- q->dir = dir;
- q->request = request;
- q->value = value;
- q->index = index;
- q->buf = buf;
- q->len = len;
- q->callback = callback;
- catc->ctrl_head = (catc->ctrl_head + 1) & (CTRL_QUEUE - 1);
- if (catc->ctrl_head == catc->ctrl_tail) {
- err("ctrl queue full");
- catc->ctrl_tail = (catc->ctrl_tail + 1) & (CTRL_QUEUE - 1);
- retval = -1;
- }
- if (!test_and_set_bit(CTRL_RUNNING, &catc->flags))
- catc_ctrl_run(catc);
- spin_unlock_irqrestore(&catc->ctrl_lock, flags);
- return retval;
- }
- /*
- * Statistics.
- */
- static void catc_stats_done(struct catc *catc, struct ctrl_queue *q)
- {
- int index = q->index - EthStats;
- u16 data, last;
- catc->stats_buf[index] = *((char *)q->buf);
- if (index & 1)
- return;
- data = ((u16)catc->stats_buf[index] << 8) | catc->stats_buf[index + 1];
- last = catc->stats_vals[index >> 1];
- switch (index) {
- case TxSingleColl:
- case TxMultiColl:
- catc->stats.collisions += data - last;
- break;
- case TxExcessColl:
- catc->stats.tx_aborted_errors += data - last;
- catc->stats.tx_errors += data - last;
- break;
- case RxFramErr:
- catc->stats.rx_frame_errors += data - last;
- catc->stats.rx_errors += data - last;
- break;
- }
- catc->stats_vals[index >> 1] = data;
- }
- static void catc_stats_timer(unsigned long data)
- {
- struct catc *catc = (void *) data;
- int i;
- for (i = 0; i < 8; i++)
- catc_get_reg_async(catc, EthStats + 7 - i, catc_stats_done);
- mod_timer(&catc->timer, jiffies + STATS_UPDATE);
- }
- static struct net_device_stats *catc_get_stats(struct net_device *netdev)
- {
- struct catc *catc = netdev->priv;
- return &catc->stats;
- }
- /*
- * Receive modes. Broadcast, Multicast, Promisc.
- */
- static void catc_multicast(unsigned char *addr, u8 *multicast)
- {
- unsigned int crc = 0xffffffff;
- u8 byte, idx, bit;
- for (idx = 0; idx < 6; idx++)
- for (byte = *addr++, bit = 0; bit < 8; bit++, byte >>= 1)
- crc = (crc >> 1) ^ (((crc ^ byte) & 1) ? 0xedb88320U : 0);
- multicast[(crc >> 3) & 0x3f] |= 1 << (crc & 7);
- }
- static void catc_set_multicast_list(struct net_device *netdev)
- {
- struct catc *catc = netdev->priv;
- struct dev_mc_list *mc;
- u8 broadcast[6];
- u8 rx = RxEnable | RxPolarity | RxMultiCast;
- int i;
- memset(broadcast, 0xff, 6);
- memset(catc->multicast, 0, 64);
- catc_multicast(broadcast, catc->multicast);
- catc_multicast(netdev->dev_addr, catc->multicast);
- if (netdev->flags & IFF_PROMISC) {
- memset(catc->multicast, 0xff, 64);
- rx |= RxPromisc;
- }
- if (netdev->flags & IFF_ALLMULTI)
- memset(catc->multicast, 0xff, 64);
- for (i = 0, mc = netdev->mc_list; mc && i < netdev->mc_count; i++, mc = mc->next)
- catc_multicast(mc->dmi_addr, catc->multicast);
- catc_set_reg_async(catc, RxUnit, rx);
- catc_write_mem_async(catc, 0xfa80, catc->multicast, 64);
- }
- /*
- * Open, close.
- */
- static int catc_open(struct net_device *netdev)
- {
- struct catc *catc = netdev->priv;
- int status;
- catc->irq_urb.dev = catc->usbdev;
- if ((status = usb_submit_urb(&catc->irq_urb)) < 0) {
- err("submit(irq_urb) status %d", status);
- return -1;
- }
- netif_start_queue(netdev);
- mod_timer(&catc->timer, jiffies + STATS_UPDATE);
- return 0;
- }
- static int catc_stop(struct net_device *netdev)
- {
- struct catc *catc = netdev->priv;
- netif_stop_queue(netdev);
- del_timer_sync(&catc->timer);
- usb_unlink_urb(&catc->rx_urb);
- usb_unlink_urb(&catc->tx_urb);
- usb_unlink_urb(&catc->irq_urb);
- usb_unlink_urb(&catc->ctrl_urb);
- return 0;
- }
- /*
- * USB probe, disconnect.
- */
- static void *catc_probe(struct usb_device *usbdev, unsigned int ifnum, const struct usb_device_id *id)
- {
- struct net_device *netdev;
- struct catc *catc;
- u8 broadcast[6];
- int i;
- if (usb_set_interface(usbdev, ifnum, 1)) {
- err("Can't set altsetting 1.");
- return NULL;
- }
- catc = kmalloc(sizeof(struct catc), GFP_KERNEL);
- memset(catc, 0, sizeof(struct catc));
- netdev = init_etherdev(0, 0);
- netdev->open = catc_open;
- netdev->hard_start_xmit = catc_hard_start_xmit;
- netdev->stop = catc_stop;
- netdev->get_stats = catc_get_stats;
- netdev->tx_timeout = catc_tx_timeout;
- netdev->watchdog_timeo = TX_TIMEOUT;
- netdev->set_multicast_list = catc_set_multicast_list;
- netdev->priv = catc;
- catc->usbdev = usbdev;
- catc->netdev = netdev;
- catc->tx_lock = SPIN_LOCK_UNLOCKED;
- catc->ctrl_lock = SPIN_LOCK_UNLOCKED;
- init_timer(&catc->timer);
- catc->timer.data = (long) catc;
- catc->timer.function = catc_stats_timer;
- FILL_CONTROL_URB(&catc->ctrl_urb, usbdev, usb_sndctrlpipe(usbdev, 0),
- NULL, NULL, 0, catc_ctrl_done, catc);
- FILL_BULK_URB(&catc->tx_urb, usbdev, usb_sndbulkpipe(usbdev, 1),
- NULL, 0, catc_tx_done, catc);
- FILL_BULK_URB(&catc->rx_urb, usbdev, usb_rcvbulkpipe(usbdev, 1),
- catc->rx_buf, RX_MAX_BURST * (PKT_SZ + 2), catc_rx_done, catc);
- FILL_INT_URB(&catc->irq_urb, usbdev, usb_rcvintpipe(usbdev, 2),
- catc->irq_buf, 2, catc_irq_done, catc, 1);
- dbg("Checking memory sizen");
- i = 0x12345678;
- catc_write_mem(catc, 0x7a80, &i, 4);
- i = 0x87654321;
- catc_write_mem(catc, 0xfa80, &i, 4);
- catc_read_mem(catc, 0x7a80, &i, 4);
- switch (i) {
- case 0x12345678:
- catc_set_reg(catc, TxBufCount, 8);
- catc_set_reg(catc, RxBufCount, 32);
- dbg("64k Memoryn");
- break;
- default:
- warn("Couldn't detect memory size, assuming 32k");
- case 0x87654321:
- catc_set_reg(catc, TxBufCount, 4);
- catc_set_reg(catc, RxBufCount, 16);
- dbg("32k Memoryn");
- break;
- }
- dbg("Getting MAC from SEEROM.");
- catc_get_mac(catc, netdev->dev_addr);
- dbg("Setting MAC into registers.");
- for (i = 0; i < 6; i++)
- catc_set_reg(catc, StationAddr0 - i, netdev->dev_addr[i]);
- dbg("Filling the multicast list.");
- memset(broadcast, 0xff, 8);
- catc_multicast(broadcast, catc->multicast);
- catc_multicast(netdev->dev_addr, catc->multicast);
- catc_write_mem(catc, 0xfa80, catc->multicast, 64);
- dbg("Clearing error counters.");
- for (i = 0; i < 8; i++)
- catc_set_reg(catc, EthStats + i, 0);
- catc->last_stats = jiffies;
- dbg("Enabling.");
- catc_set_reg(catc, MaxBurst, RX_MAX_BURST);
- catc_set_reg(catc, OpModes, OpTxMerge | OpRxMerge | OpLenInclude | Op3MemWaits);
- catc_set_reg(catc, LEDCtrl, LEDLink);
- catc_set_reg(catc, RxUnit, RxEnable | RxPolarity | RxMultiCast);
- dbg("Init done.");
- printk(KERN_INFO "%s: CATC EL1210A NetMate USB Ethernet at usb%d:%d.%d, ",
- netdev->name, usbdev->bus->busnum, usbdev->devnum, ifnum);
- for (i = 0; i < 5; i++) printk("%2.2x:", netdev->dev_addr[i]);
- printk("%2.2x.n", netdev->dev_addr[i]);
- return catc;
- }
- static void catc_disconnect(struct usb_device *usbdev, void *dev_ptr)
- {
- struct catc *catc = dev_ptr;
- unregister_netdev(catc->netdev);
- kfree(catc->netdev);
- kfree(catc);
- }
- /*
- * Module functions and tables.
- */
- static struct usb_device_id catc_id_table [] = {
- { USB_DEVICE(0x0423, 0xa) }, /* CATC Netmate */
- { USB_DEVICE(0x0423, 0xc) }, /* CATC Netmate II, Belkin F5U111 */
- { USB_DEVICE(0x08d1, 0x1) }, /* smartBridges smartNIC */
- { }
- };
- MODULE_DEVICE_TABLE(usb, catc_id_table);
- static struct usb_driver catc_driver = {
- name: "catc",
- probe: catc_probe,
- disconnect: catc_disconnect,
- id_table: catc_id_table,
- };
- static int __init catc_init(void)
- {
- info(DRIVER_VERSION " " DRIVER_DESC);
- usb_register(&catc_driver);
- return 0;
- }
- static void __exit catc_exit(void)
- {
- usb_deregister(&catc_driver);
- }
- module_init(catc_init);
- module_exit(catc_exit);