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418 lines
13 KiB
418 lines
13 KiB
/* |
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* Linux ARCnet driver - COM20020 chipset support |
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* |
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* Written 1997 by David Woodhouse. |
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* Written 1994-1999 by Avery Pennarun. |
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* Written 1999 by Martin Mares <[email protected]>. |
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* Derived from skeleton.c by Donald Becker. |
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* |
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* Special thanks to Contemporary Controls, Inc. (www.ccontrols.com) |
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* for sponsoring the further development of this driver. |
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* |
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* ********************** |
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* |
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* The original copyright of skeleton.c was as follows: |
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* |
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* skeleton.c Written 1993 by Donald Becker. |
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* Copyright 1993 United States Government as represented by the |
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* Director, National Security Agency. This software may only be used |
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* and distributed according to the terms of the GNU General Public License as |
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* modified by SRC, incorporated herein by reference. |
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* |
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* ********************** |
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* |
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* For more details, see drivers/net/arcnet.c |
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* |
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* ********************** |
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*/ |
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#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/ioport.h> |
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#include <linux/errno.h> |
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#include <linux/delay.h> |
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#include <linux/netdevice.h> |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/io.h> |
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#include "arcdevice.h" |
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#include "com20020.h" |
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static const char * const clockrates[] = { |
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"XXXXXXX", "XXXXXXXX", "XXXXXX", "2.5 Mb/s", |
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"1.25Mb/s", "625 Kb/s", "312.5 Kb/s", "156.25 Kb/s", |
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"Reserved", "Reserved", "Reserved" |
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}; |
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static void com20020_command(struct net_device *dev, int command); |
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static int com20020_status(struct net_device *dev); |
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static void com20020_setmask(struct net_device *dev, int mask); |
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static int com20020_reset(struct net_device *dev, int really_reset); |
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static void com20020_copy_to_card(struct net_device *dev, int bufnum, |
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int offset, void *buf, int count); |
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static void com20020_copy_from_card(struct net_device *dev, int bufnum, |
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int offset, void *buf, int count); |
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static void com20020_set_mc_list(struct net_device *dev); |
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static void com20020_close(struct net_device *); |
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static void com20020_copy_from_card(struct net_device *dev, int bufnum, |
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int offset, void *buf, int count) |
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{ |
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int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset; |
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/* set up the address register */ |
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arcnet_outb((ofs >> 8) | RDDATAflag | AUTOINCflag, |
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ioaddr, COM20020_REG_W_ADDR_HI); |
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arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO); |
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/* copy the data */ |
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TIME(dev, "insb", count, |
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arcnet_insb(ioaddr, COM20020_REG_RW_MEMDATA, buf, count)); |
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} |
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static void com20020_copy_to_card(struct net_device *dev, int bufnum, |
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int offset, void *buf, int count) |
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{ |
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int ioaddr = dev->base_addr, ofs = 512 * bufnum + offset; |
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/* set up the address register */ |
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arcnet_outb((ofs >> 8) | AUTOINCflag, ioaddr, COM20020_REG_W_ADDR_HI); |
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arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO); |
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/* copy the data */ |
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TIME(dev, "outsb", count, |
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arcnet_outsb(ioaddr, COM20020_REG_RW_MEMDATA, buf, count)); |
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} |
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/* Reset the card and check some basic stuff during the detection stage. */ |
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int com20020_check(struct net_device *dev) |
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{ |
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int ioaddr = dev->base_addr, status; |
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struct arcnet_local *lp = netdev_priv(dev); |
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arcnet_outb(XTOcfg(3) | RESETcfg, ioaddr, COM20020_REG_W_CONFIG); |
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udelay(5); |
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arcnet_outb(XTOcfg(3), ioaddr, COM20020_REG_W_CONFIG); |
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mdelay(RESETtime); |
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lp->setup = lp->clockm ? 0 : (lp->clockp << 1); |
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lp->setup2 = (lp->clockm << 4) | 8; |
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/* CHECK: should we do this for SOHARD cards ? */ |
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/* Enable P1Mode for backplane mode */ |
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lp->setup = lp->setup | P1MODE; |
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com20020_set_subaddress(lp, ioaddr, SUB_SETUP1); |
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arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG); |
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if (lp->clockm != 0) { |
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com20020_set_subaddress(lp, ioaddr, SUB_SETUP2); |
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arcnet_outb(lp->setup2, ioaddr, COM20020_REG_W_XREG); |
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/* must now write the magic "restart operation" command */ |
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mdelay(1); |
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arcnet_outb(STARTIOcmd, ioaddr, COM20020_REG_W_COMMAND); |
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} |
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lp->config = (lp->timeout << 3) | (lp->backplane << 2) | SUB_NODE; |
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/* set node ID to 0x42 (but transmitter is disabled, so it's okay) */ |
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arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG); |
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arcnet_outb(0x42, ioaddr, COM20020_REG_W_XREG); |
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status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS); |
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if ((status & 0x99) != (NORXflag | TXFREEflag | RESETflag)) { |
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arc_printk(D_NORMAL, dev, "status invalid (%Xh).\n", status); |
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return -ENODEV; |
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} |
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arc_printk(D_INIT_REASONS, dev, "status after reset: %X\n", status); |
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arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear, |
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ioaddr, COM20020_REG_W_COMMAND); |
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status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS); |
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arc_printk(D_INIT_REASONS, dev, "status after reset acknowledged: %X\n", |
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status); |
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/* Read first location of memory */ |
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arcnet_outb(0 | RDDATAflag | AUTOINCflag, |
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ioaddr, COM20020_REG_W_ADDR_HI); |
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arcnet_outb(0, ioaddr, COM20020_REG_W_ADDR_LO); |
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status = arcnet_inb(ioaddr, COM20020_REG_RW_MEMDATA); |
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if (status != TESTvalue) { |
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arc_printk(D_NORMAL, dev, "Signature byte not found (%02Xh != D1h).\n", |
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status); |
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return -ENODEV; |
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} |
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return 0; |
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} |
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static int com20020_set_hwaddr(struct net_device *dev, void *addr) |
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{ |
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int ioaddr = dev->base_addr; |
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struct arcnet_local *lp = netdev_priv(dev); |
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struct sockaddr *hwaddr = addr; |
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memcpy(dev->dev_addr, hwaddr->sa_data, 1); |
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com20020_set_subaddress(lp, ioaddr, SUB_NODE); |
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arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG); |
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return 0; |
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} |
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static int com20020_netdev_open(struct net_device *dev) |
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{ |
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int ioaddr = dev->base_addr; |
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struct arcnet_local *lp = netdev_priv(dev); |
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lp->config |= TXENcfg; |
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arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG); |
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return arcnet_open(dev); |
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} |
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static int com20020_netdev_close(struct net_device *dev) |
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{ |
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int ioaddr = dev->base_addr; |
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struct arcnet_local *lp = netdev_priv(dev); |
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arcnet_close(dev); |
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/* disable transmitter */ |
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lp->config &= ~TXENcfg; |
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arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG); |
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return 0; |
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} |
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const struct net_device_ops com20020_netdev_ops = { |
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.ndo_open = com20020_netdev_open, |
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.ndo_stop = com20020_netdev_close, |
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.ndo_start_xmit = arcnet_send_packet, |
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.ndo_tx_timeout = arcnet_timeout, |
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.ndo_set_mac_address = com20020_set_hwaddr, |
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.ndo_set_rx_mode = com20020_set_mc_list, |
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}; |
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/* Set up the struct net_device associated with this card. Called after |
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* probing succeeds. |
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*/ |
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int com20020_found(struct net_device *dev, int shared) |
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{ |
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struct arcnet_local *lp; |
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int ioaddr = dev->base_addr; |
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/* Initialize the rest of the device structure. */ |
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lp = netdev_priv(dev); |
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lp->hw.owner = THIS_MODULE; |
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lp->hw.command = com20020_command; |
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lp->hw.status = com20020_status; |
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lp->hw.intmask = com20020_setmask; |
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lp->hw.reset = com20020_reset; |
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lp->hw.copy_to_card = com20020_copy_to_card; |
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lp->hw.copy_from_card = com20020_copy_from_card; |
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lp->hw.close = com20020_close; |
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/* FIXME: do this some other way! */ |
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if (!dev->dev_addr[0]) |
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dev->dev_addr[0] = arcnet_inb(ioaddr, 8); |
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com20020_set_subaddress(lp, ioaddr, SUB_SETUP1); |
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arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG); |
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if (lp->card_flags & ARC_CAN_10MBIT) { |
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com20020_set_subaddress(lp, ioaddr, SUB_SETUP2); |
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arcnet_outb(lp->setup2, ioaddr, COM20020_REG_W_XREG); |
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/* must now write the magic "restart operation" command */ |
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mdelay(1); |
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arcnet_outb(STARTIOcmd, ioaddr, COM20020_REG_W_COMMAND); |
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} |
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lp->config = (lp->timeout << 3) | (lp->backplane << 2) | SUB_NODE; |
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/* Default 0x38 + register: Node ID */ |
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arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG); |
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arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG); |
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/* reserve the irq */ |
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if (request_irq(dev->irq, arcnet_interrupt, shared, |
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"arcnet (COM20020)", dev)) { |
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arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq); |
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return -ENODEV; |
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} |
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arc_printk(D_NORMAL, dev, "%s: station %02Xh found at %03lXh, IRQ %d.\n", |
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lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq); |
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if (lp->backplane) |
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arc_printk(D_NORMAL, dev, "Using backplane mode.\n"); |
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if (lp->timeout != 3) |
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arc_printk(D_NORMAL, dev, "Using extended timeout value of %d\n", |
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lp->timeout); |
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arc_printk(D_NORMAL, dev, "Using CKP %d - data rate %s\n", |
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lp->setup >> 1, |
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clockrates[3 - |
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((lp->setup2 & 0xF0) >> 4) + |
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((lp->setup & 0x0F) >> 1)]); |
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/* The clockrates array index looks very fragile. |
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* It seems like it could have negative indexing. |
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*/ |
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if (register_netdev(dev)) { |
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free_irq(dev->irq, dev); |
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return -EIO; |
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} |
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return 0; |
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} |
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/* Do a hardware reset on the card, and set up necessary registers. |
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* |
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* This should be called as little as possible, because it disrupts the |
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* token on the network (causes a RECON) and requires a significant delay. |
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* |
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* However, it does make sure the card is in a defined state. |
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*/ |
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static int com20020_reset(struct net_device *dev, int really_reset) |
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{ |
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struct arcnet_local *lp = netdev_priv(dev); |
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u_int ioaddr = dev->base_addr; |
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u_char inbyte; |
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arc_printk(D_DEBUG, dev, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n", |
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__FILE__, __LINE__, __func__, dev, lp, dev->name); |
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arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n", |
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dev->name, arcnet_inb(ioaddr, COM20020_REG_R_STATUS)); |
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arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); |
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lp->config |= (lp->timeout << 3) | (lp->backplane << 2); |
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/* power-up defaults */ |
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arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG); |
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arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); |
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if (really_reset) { |
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/* reset the card */ |
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arcnet_outb(lp->config | RESETcfg, ioaddr, COM20020_REG_W_CONFIG); |
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udelay(5); |
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arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG); |
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mdelay(RESETtime * 2); |
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/* COM20020 seems to be slower sometimes */ |
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} |
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/* clear flags & end reset */ |
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arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); |
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arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear, |
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ioaddr, COM20020_REG_W_COMMAND); |
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/* verify that the ARCnet signature byte is present */ |
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arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); |
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com20020_copy_from_card(dev, 0, 0, &inbyte, 1); |
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arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); |
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if (inbyte != TESTvalue) { |
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arc_printk(D_DEBUG, dev, "%s: %d: %s\n", |
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__FILE__, __LINE__, __func__); |
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arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n"); |
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return 1; |
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} |
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/* enable extended (512-byte) packets */ |
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arcnet_outb(CONFIGcmd | EXTconf, ioaddr, COM20020_REG_W_COMMAND); |
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arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); |
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/* done! return success. */ |
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return 0; |
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} |
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static void com20020_setmask(struct net_device *dev, int mask) |
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{ |
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u_int ioaddr = dev->base_addr; |
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arc_printk(D_DURING, dev, "Setting mask to %x at %x\n", mask, ioaddr); |
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arcnet_outb(mask, ioaddr, COM20020_REG_W_INTMASK); |
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} |
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static void com20020_command(struct net_device *dev, int cmd) |
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{ |
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u_int ioaddr = dev->base_addr; |
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arcnet_outb(cmd, ioaddr, COM20020_REG_W_COMMAND); |
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} |
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static int com20020_status(struct net_device *dev) |
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{ |
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u_int ioaddr = dev->base_addr; |
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return arcnet_inb(ioaddr, COM20020_REG_R_STATUS) + |
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(arcnet_inb(ioaddr, COM20020_REG_R_DIAGSTAT) << 8); |
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} |
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static void com20020_close(struct net_device *dev) |
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{ |
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struct arcnet_local *lp = netdev_priv(dev); |
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int ioaddr = dev->base_addr; |
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/* disable transmitter */ |
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lp->config &= ~TXENcfg; |
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arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG); |
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} |
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/* Set or clear the multicast filter for this adaptor. |
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* num_addrs == -1 Promiscuous mode, receive all packets |
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* num_addrs == 0 Normal mode, clear multicast list |
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* num_addrs > 0 Multicast mode, receive normal and MC packets, and do |
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* best-effort filtering. |
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* FIXME - do multicast stuff, not just promiscuous. |
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*/ |
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static void com20020_set_mc_list(struct net_device *dev) |
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{ |
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struct arcnet_local *lp = netdev_priv(dev); |
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int ioaddr = dev->base_addr; |
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if ((dev->flags & IFF_PROMISC) && (dev->flags & IFF_UP)) { |
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/* Enable promiscuous mode */ |
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if (!(lp->setup & PROMISCset)) |
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arc_printk(D_NORMAL, dev, "Setting promiscuous flag...\n"); |
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com20020_set_subaddress(lp, ioaddr, SUB_SETUP1); |
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lp->setup |= PROMISCset; |
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arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG); |
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} else { |
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/* Disable promiscuous mode, use normal mode */ |
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if ((lp->setup & PROMISCset)) |
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arc_printk(D_NORMAL, dev, "Resetting promiscuous flag...\n"); |
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com20020_set_subaddress(lp, ioaddr, SUB_SETUP1); |
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lp->setup &= ~PROMISCset; |
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arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG); |
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} |
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} |
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#if defined(CONFIG_ARCNET_COM20020_PCI_MODULE) || \ |
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defined(CONFIG_ARCNET_COM20020_ISA_MODULE) || \ |
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defined(CONFIG_ARCNET_COM20020_CS_MODULE) |
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EXPORT_SYMBOL(com20020_check); |
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EXPORT_SYMBOL(com20020_found); |
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EXPORT_SYMBOL(com20020_netdev_ops); |
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#endif |
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MODULE_LICENSE("GPL"); |
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#ifdef MODULE |
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static int __init com20020_module_init(void) |
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{ |
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if (BUGLVL(D_NORMAL)) |
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pr_info("%s\n", "COM20020 chipset support (by David Woodhouse et al.)"); |
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return 0; |
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} |
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static void __exit com20020_module_exit(void) |
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{ |
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} |
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module_init(com20020_module_init); |
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module_exit(com20020_module_exit); |
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#endif /* MODULE */
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