--- /dev/null
+/*
+ * Linux ARCnet driver - COM20020 chipset support
+ *
+ * Written 1997 by David Woodhouse.
+ * Written 1994-1999 by Avery Pennarun.
+ * Written 1999 by Martin Mares <mj@ucw.cz>.
+ * Derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ * for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency. This software may only be used
+ * and distributed according to the terms of the GNU General Public License as
+ * modified by SRC, incorporated herein by reference.
+ *
+ * **********************
+ *
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/ioport.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/arcdevice.h>
+#include <linux/com20020.h>
+
+#include <asm/io.h>
+
+#define VERSION "arcnet: COM20020 chipset support (by David Woodhouse et al.)\n"
+
+static char *clockrates[] =
+{"10 Mb/s", "Reserved", "5 Mb/s",
+ "2.5 Mb/s", "1.25Mb/s", "625 Kb/s", "312.5 Kb/s",
+ "156.25 Kb/s", "Reserved", "Reserved", "Reserved"};
+
+static void com20020_command(struct net_device *dev, int command);
+static int com20020_status(struct net_device *dev);
+static void com20020_setmask(struct net_device *dev, int mask);
+static int com20020_reset(struct net_device *dev, int really_reset);
+static void com20020_copy_to_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count);
+static void com20020_copy_from_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count);
+static void com20020_set_mc_list(struct net_device *dev);
+static void com20020_close(struct net_device *);
+
+static void com20020_copy_from_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count)
+{
+ int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;
+
+ /* set up the address register */
+ outb((ofs >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
+ outb(ofs & 0xff, _ADDR_LO);
+
+ /* copy the data */
+ TIME("insb", count, insb(_MEMDATA, buf, count));
+}
+
+
+static void com20020_copy_to_card(struct net_device *dev, int bufnum,
+ int offset, void *buf, int count)
+{
+ int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset;
+
+ /* set up the address register */
+ outb((ofs >> 8) | AUTOINCflag, _ADDR_HI);
+ outb(ofs & 0xff, _ADDR_LO);
+
+ /* copy the data */
+ TIME("outsb", count, outsb(_MEMDATA, buf, count));
+}
+
+
+/* Reset the card and check some basic stuff during the detection stage. */
+int com20020_check(struct net_device *dev)
+{
+ int ioaddr = dev->base_addr, status;
+ struct arcnet_local *lp = netdev_priv(dev);
+
+ ARCRESET0;
+ mdelay(RESETtime);
+
+ lp->setup = lp->clockm ? 0 : (lp->clockp << 1);
+ lp->setup2 = (lp->clockm << 4) | 8;
+
+ /* CHECK: should we do this for SOHARD cards ? */
+ /* Enable P1Mode for backplane mode */
+ lp->setup = lp->setup | P1MODE;
+
+ SET_SUBADR(SUB_SETUP1);
+ outb(lp->setup, _XREG);
+
+ if (lp->clockm != 0)
+ {
+ SET_SUBADR(SUB_SETUP2);
+ outb(lp->setup2, _XREG);
+
+ /* must now write the magic "restart operation" command */
+ mdelay(1);
+ outb(0x18, _COMMAND);
+ }
+
+ lp->config = 0x21 | (lp->timeout << 3) | (lp->backplane << 2);
+ /* set node ID to 0x42 (but transmitter is disabled, so it's okay) */
+ SETCONF;
+ outb(0x42, ioaddr + BUS_ALIGN*7);
+
+ status = ASTATUS();
+
+ if ((status & 0x99) != (NORXflag | TXFREEflag | RESETflag)) {
+ BUGMSG(D_NORMAL, "status invalid (%Xh).\n", status);
+ return -ENODEV;
+ }
+ BUGMSG(D_INIT_REASONS, "status after reset: %X\n", status);
+
+ /* Enable TX */
+ outb(0x39, _CONFIG);
+ outb(inb(ioaddr + BUS_ALIGN*8), ioaddr + BUS_ALIGN*7);
+
+ ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear);
+
+ status = ASTATUS();
+ BUGMSG(D_INIT_REASONS, "status after reset acknowledged: %X\n",
+ status);
+
+ /* Read first location of memory */
+ outb(0 | RDDATAflag | AUTOINCflag, _ADDR_HI);
+ outb(0, _ADDR_LO);
+
+ if ((status = inb(_MEMDATA)) != TESTvalue) {
+ BUGMSG(D_NORMAL, "Signature byte not found (%02Xh != D1h).\n",
+ status);
+ return -ENODEV;
+ }
+ return 0;
+}
+
+static int com20020_set_hwaddr(struct net_device *dev, void *addr)
+{
+ int ioaddr = dev->base_addr;
+ struct arcnet_local *lp = netdev_priv(dev);
+ struct sockaddr *hwaddr = addr;
+
+ memcpy(dev->dev_addr, hwaddr->sa_data, 1);
+ SET_SUBADR(SUB_NODE);
+ outb(dev->dev_addr[0], _XREG);
+
+ return 0;
+}
+
+const struct net_device_ops com20020_netdev_ops = {
+ .ndo_open = arcnet_open,
+ .ndo_stop = arcnet_close,
+ .ndo_start_xmit = arcnet_send_packet,
+ .ndo_tx_timeout = arcnet_timeout,
+ .ndo_set_mac_address = com20020_set_hwaddr,
+ .ndo_set_rx_mode = com20020_set_mc_list,
+};
+
+/* Set up the struct net_device associated with this card. Called after
+ * probing succeeds.
+ */
+int com20020_found(struct net_device *dev, int shared)
+{
+ struct arcnet_local *lp;
+ int ioaddr = dev->base_addr;
+
+ /* Initialize the rest of the device structure. */
+
+ lp = netdev_priv(dev);
+
+ lp->hw.owner = THIS_MODULE;
+ lp->hw.command = com20020_command;
+ lp->hw.status = com20020_status;
+ lp->hw.intmask = com20020_setmask;
+ lp->hw.reset = com20020_reset;
+ lp->hw.copy_to_card = com20020_copy_to_card;
+ lp->hw.copy_from_card = com20020_copy_from_card;
+ lp->hw.close = com20020_close;
+
+ if (!dev->dev_addr[0])
+ dev->dev_addr[0] = inb(ioaddr + BUS_ALIGN*8); /* FIXME: do this some other way! */
+
+ SET_SUBADR(SUB_SETUP1);
+ outb(lp->setup, _XREG);
+
+ if (lp->card_flags & ARC_CAN_10MBIT)
+ {
+ SET_SUBADR(SUB_SETUP2);
+ outb(lp->setup2, _XREG);
+
+ /* must now write the magic "restart operation" command */
+ mdelay(1);
+ outb(0x18, _COMMAND);
+ }
+
+ lp->config = 0x20 | (lp->timeout << 3) | (lp->backplane << 2) | 1;
+ /* Default 0x38 + register: Node ID */
+ SETCONF;
+ outb(dev->dev_addr[0], _XREG);
+
+ /* reserve the irq */
+ if (request_irq(dev->irq, arcnet_interrupt, shared,
+ "arcnet (COM20020)", dev)) {
+ BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq);
+ return -ENODEV;
+ }
+
+ dev->base_addr = ioaddr;
+
+ BUGMSG(D_NORMAL, "%s: station %02Xh found at %03lXh, IRQ %d.\n",
+ lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq);
+
+ if (lp->backplane)
+ BUGMSG(D_NORMAL, "Using backplane mode.\n");
+
+ if (lp->timeout != 3)
+ BUGMSG(D_NORMAL, "Using extended timeout value of %d.\n", lp->timeout);
+
+ BUGMSG(D_NORMAL, "Using CKP %d - data rate %s.\n",
+ lp->setup >> 1,
+ clockrates[3 - ((lp->setup2 & 0xF0) >> 4) + ((lp->setup & 0x0F) >> 1)]);
+
+ if (register_netdev(dev)) {
+ free_irq(dev->irq, dev);
+ return -EIO;
+ }
+ return 0;
+}
+
+
+/*
+ * Do a hardware reset on the card, and set up necessary registers.
+ *
+ * This should be called as little as possible, because it disrupts the
+ * token on the network (causes a RECON) and requires a significant delay.
+ *
+ * However, it does make sure the card is in a defined state.
+ */
+static int com20020_reset(struct net_device *dev, int really_reset)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ u_int ioaddr = dev->base_addr;
+ u_char inbyte;
+
+ BUGMSG(D_DEBUG, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n",
+ __FILE__,__LINE__,__func__,dev,lp,dev->name);
+ BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n",
+ dev->name, ASTATUS());
+
+ BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__);
+ lp->config = TXENcfg | (lp->timeout << 3) | (lp->backplane << 2);
+ /* power-up defaults */
+ SETCONF;
+ BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__);
+
+ if (really_reset) {
+ /* reset the card */
+ ARCRESET;
+ mdelay(RESETtime * 2); /* COM20020 seems to be slower sometimes */
+ }
+ /* clear flags & end reset */
+ BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__);
+ ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear);
+
+ /* verify that the ARCnet signature byte is present */
+ BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__);
+
+ com20020_copy_from_card(dev, 0, 0, &inbyte, 1);
+ BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__);
+ if (inbyte != TESTvalue) {
+ BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__);
+ BUGMSG(D_NORMAL, "reset failed: TESTvalue not present.\n");
+ return 1;
+ }
+ /* enable extended (512-byte) packets */
+ ACOMMAND(CONFIGcmd | EXTconf);
+ BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__func__);
+
+ /* done! return success. */
+ return 0;
+}
+
+
+static void com20020_setmask(struct net_device *dev, int mask)
+{
+ u_int ioaddr = dev->base_addr;
+ BUGMSG(D_DURING, "Setting mask to %x at %x\n",mask,ioaddr);
+ AINTMASK(mask);
+}
+
+
+static void com20020_command(struct net_device *dev, int cmd)
+{
+ u_int ioaddr = dev->base_addr;
+ ACOMMAND(cmd);
+}
+
+
+static int com20020_status(struct net_device *dev)
+{
+ u_int ioaddr = dev->base_addr;
+
+ return ASTATUS() + (ADIAGSTATUS()<<8);
+}
+
+static void com20020_close(struct net_device *dev)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ int ioaddr = dev->base_addr;
+
+ /* disable transmitter */
+ lp->config &= ~TXENcfg;
+ SETCONF;
+}
+
+/* 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.
+ * FIXME - do multicast stuff, not just promiscuous.
+ */
+static void com20020_set_mc_list(struct net_device *dev)
+{
+ struct arcnet_local *lp = netdev_priv(dev);
+ int ioaddr = dev->base_addr;
+
+ if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) { /* Enable promiscuous mode */
+ if (!(lp->setup & PROMISCset))
+ BUGMSG(D_NORMAL, "Setting promiscuous flag...\n");
+ SET_SUBADR(SUB_SETUP1);
+ lp->setup |= PROMISCset;
+ outb(lp->setup, _XREG);
+ } else
+ /* Disable promiscuous mode, use normal mode */
+ {
+ if ((lp->setup & PROMISCset))
+ BUGMSG(D_NORMAL, "Resetting promiscuous flag...\n");
+ SET_SUBADR(SUB_SETUP1);
+ lp->setup &= ~PROMISCset;
+ outb(lp->setup, _XREG);
+ }
+}
+
+#if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \
+ defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \
+ defined(CONFIG_ARCNET_COM20020_CS_MODULE)
+EXPORT_SYMBOL(com20020_check);
+EXPORT_SYMBOL(com20020_found);
+EXPORT_SYMBOL(com20020_netdev_ops);
+#endif
+
+MODULE_LICENSE("GPL");
+
+#ifdef MODULE
+
+static int __init com20020_module_init(void)
+{
+ BUGLVL(D_NORMAL) printk(VERSION);
+ return 0;
+}
+
+static void __exit com20020_module_exit(void)
+{
+}
+module_init(com20020_module_init);
+module_exit(com20020_module_exit);
+#endif /* MODULE */
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