diff options
Diffstat (limited to 'drivers/net/arcnet/com20020.c')
| -rw-r--r-- | drivers/net/arcnet/com20020.c | 357 |
1 files changed, 357 insertions, 0 deletions
diff --git a/drivers/net/arcnet/com20020.c b/drivers/net/arcnet/com20020.c new file mode 100644 index 00000000000..0dc70c7b794 --- /dev/null +++ b/drivers/net/arcnet/com20020.c @@ -0,0 +1,357 @@ +/* + * 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/slab.h> +#include <linux/errno.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/init.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 = dev->priv; + + 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->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 = 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; +} + +/* 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 = dev->priv; + + 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; + + dev->set_multicast_list = com20020_set_mc_list; + + 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 = dev->priv; + 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__,__FUNCTION__,dev,lp,dev->name); + BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", + dev->name, ASTATUS()); + + BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__); + lp->config = TXENcfg | (lp->timeout << 3) | (lp->backplane << 2); + /* power-up defaults */ + SETCONF; + BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__); + + 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__,__FUNCTION__); + ACOMMAND(CFLAGScmd | RESETclear | CONFIGclear); + + /* verify that the ARCnet signature byte is present */ + BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__); + + com20020_copy_from_card(dev, 0, 0, &inbyte, 1); + BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__); + if (inbyte != TESTvalue) { + BUGMSG(D_DEBUG, "%s: %d: %s\n",__FILE__,__LINE__,__FUNCTION__); + 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__,__FUNCTION__); + + /* 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 = dev->priv; + 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 = dev->priv; + 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); + } +} + +#ifdef MODULE + +EXPORT_SYMBOL(com20020_check); +EXPORT_SYMBOL(com20020_found); + +MODULE_LICENSE("GPL"); + +int init_module(void) +{ + BUGLVL(D_NORMAL) printk(VERSION); + return 0; +} + +void cleanup_module(void) +{ +} + +#endif /* MODULE */ |