diff options
Diffstat (limited to 'drivers/net/arcnet/com20020.c')
| -rw-r--r-- | drivers/net/arcnet/com20020.c | 418 |
1 files changed, 418 insertions, 0 deletions
diff --git a/drivers/net/arcnet/com20020.c b/drivers/net/arcnet/com20020.c new file mode 100644 index 0000000000..06e1651b59 --- /dev/null +++ b/drivers/net/arcnet/com20020.c @@ -0,0 +1,418 @@ +/* + * 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 + * + * ********************** + */ + +#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt + +#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/io.h> + +#include "arcdevice.h" +#include "com20020.h" + +static const char * const clockrates[] = { + "XXXXXXX", "XXXXXXXX", "XXXXXX", "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 */ + arcnet_outb((ofs >> 8) | RDDATAflag | AUTOINCflag, + ioaddr, COM20020_REG_W_ADDR_HI); + arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO); + + /* copy the data */ + TIME(dev, "insb", count, + arcnet_insb(ioaddr, COM20020_REG_RW_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 */ + arcnet_outb((ofs >> 8) | AUTOINCflag, ioaddr, COM20020_REG_W_ADDR_HI); + arcnet_outb(ofs & 0xff, ioaddr, COM20020_REG_W_ADDR_LO); + + /* copy the data */ + TIME(dev, "outsb", count, + arcnet_outsb(ioaddr, COM20020_REG_RW_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); + + arcnet_outb(XTOcfg(3) | RESETcfg, ioaddr, COM20020_REG_W_CONFIG); + udelay(5); + arcnet_outb(XTOcfg(3), ioaddr, COM20020_REG_W_CONFIG); + 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; + + com20020_set_subaddress(lp, ioaddr, SUB_SETUP1); + arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG); + + if (lp->clockm != 0) { + com20020_set_subaddress(lp, ioaddr, SUB_SETUP2); + arcnet_outb(lp->setup2, ioaddr, COM20020_REG_W_XREG); + + /* must now write the magic "restart operation" command */ + mdelay(1); + arcnet_outb(STARTIOcmd, ioaddr, COM20020_REG_W_COMMAND); + } + + lp->config = (lp->timeout << 3) | (lp->backplane << 2) | SUB_NODE; + /* set node ID to 0x42 (but transmitter is disabled, so it's okay) */ + arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG); + arcnet_outb(0x42, ioaddr, COM20020_REG_W_XREG); + + status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS); + + if ((status & 0x99) != (NORXflag | TXFREEflag | RESETflag)) { + arc_printk(D_NORMAL, dev, "status invalid (%Xh).\n", status); + return -ENODEV; + } + arc_printk(D_INIT_REASONS, dev, "status after reset: %X\n", status); + + arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear, + ioaddr, COM20020_REG_W_COMMAND); + status = arcnet_inb(ioaddr, COM20020_REG_R_STATUS); + arc_printk(D_INIT_REASONS, dev, "status after reset acknowledged: %X\n", + status); + + /* Read first location of memory */ + arcnet_outb(0 | RDDATAflag | AUTOINCflag, + ioaddr, COM20020_REG_W_ADDR_HI); + arcnet_outb(0, ioaddr, COM20020_REG_W_ADDR_LO); + + status = arcnet_inb(ioaddr, COM20020_REG_RW_MEMDATA); + if (status != TESTvalue) { + arc_printk(D_NORMAL, dev, "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; + + dev_addr_set(dev, hwaddr->sa_data); + com20020_set_subaddress(lp, ioaddr, SUB_NODE); + arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG); + + return 0; +} + +static int com20020_netdev_open(struct net_device *dev) +{ + int ioaddr = dev->base_addr; + struct arcnet_local *lp = netdev_priv(dev); + + lp->config |= TXENcfg; + arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG); + + return arcnet_open(dev); +} + +static int com20020_netdev_close(struct net_device *dev) +{ + int ioaddr = dev->base_addr; + struct arcnet_local *lp = netdev_priv(dev); + + arcnet_close(dev); + + /* disable transmitter */ + lp->config &= ~TXENcfg; + arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG); + return 0; +} + +const struct net_device_ops com20020_netdev_ops = { + .ndo_open = com20020_netdev_open, + .ndo_stop = com20020_netdev_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; + + /* FIXME: do this some other way! */ + if (!dev->dev_addr[0]) + arcnet_set_addr(dev, arcnet_inb(ioaddr, 8)); + + com20020_set_subaddress(lp, ioaddr, SUB_SETUP1); + arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG); + + if (lp->card_flags & ARC_CAN_10MBIT) { + com20020_set_subaddress(lp, ioaddr, SUB_SETUP2); + arcnet_outb(lp->setup2, ioaddr, COM20020_REG_W_XREG); + + /* must now write the magic "restart operation" command */ + mdelay(1); + arcnet_outb(STARTIOcmd, ioaddr, COM20020_REG_W_COMMAND); + } + + lp->config = (lp->timeout << 3) | (lp->backplane << 2) | SUB_NODE; + /* Default 0x38 + register: Node ID */ + arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG); + arcnet_outb(dev->dev_addr[0], ioaddr, COM20020_REG_W_XREG); + + /* reserve the irq */ + if (request_irq(dev->irq, arcnet_interrupt, shared, + "arcnet (COM20020)", dev)) { + arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", dev->irq); + return -ENODEV; + } + + arc_printk(D_NORMAL, dev, "%s: station %02Xh found at %03lXh, IRQ %d.\n", + lp->card_name, dev->dev_addr[0], dev->base_addr, dev->irq); + + if (lp->backplane) + arc_printk(D_NORMAL, dev, "Using backplane mode.\n"); + + if (lp->timeout != 3) + arc_printk(D_NORMAL, dev, "Using extended timeout value of %d\n", + lp->timeout); + + arc_printk(D_NORMAL, dev, "Using CKP %d - data rate %s\n", + lp->setup >> 1, + clockrates[3 - + ((lp->setup2 & 0xF0) >> 4) + + ((lp->setup & 0x0F) >> 1)]); + /* The clockrates array index looks very fragile. + * It seems like it could have negative indexing. + */ + + 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; + + arc_printk(D_DEBUG, dev, "%s: %d: %s: dev: %p, lp: %p, dev->name: %s\n", + __FILE__, __LINE__, __func__, dev, lp, dev->name); + arc_printk(D_INIT, dev, "Resetting %s (status=%02Xh)\n", + dev->name, arcnet_inb(ioaddr, COM20020_REG_R_STATUS)); + + arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); + lp->config |= (lp->timeout << 3) | (lp->backplane << 2); + /* power-up defaults */ + arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG); + arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); + + if (really_reset) { + /* reset the card */ + arcnet_outb(lp->config | RESETcfg, ioaddr, COM20020_REG_W_CONFIG); + udelay(5); + arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG); + mdelay(RESETtime * 2); + /* COM20020 seems to be slower sometimes */ + } + /* clear flags & end reset */ + arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); + arcnet_outb(CFLAGScmd | RESETclear | CONFIGclear, + ioaddr, COM20020_REG_W_COMMAND); + + /* verify that the ARCnet signature byte is present */ + arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); + + com20020_copy_from_card(dev, 0, 0, &inbyte, 1); + arc_printk(D_DEBUG, dev, "%s: %d: %s\n", __FILE__, __LINE__, __func__); + if (inbyte != TESTvalue) { + arc_printk(D_DEBUG, dev, "%s: %d: %s\n", + __FILE__, __LINE__, __func__); + arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n"); + return 1; + } + /* enable extended (512-byte) packets */ + arcnet_outb(CONFIGcmd | EXTconf, ioaddr, COM20020_REG_W_COMMAND); + + arc_printk(D_DEBUG, dev, "%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; + + arc_printk(D_DURING, dev, "Setting mask to %x at %x\n", mask, ioaddr); + arcnet_outb(mask, ioaddr, COM20020_REG_W_INTMASK); +} + +static void com20020_command(struct net_device *dev, int cmd) +{ + u_int ioaddr = dev->base_addr; + + arcnet_outb(cmd, ioaddr, COM20020_REG_W_COMMAND); +} + +static int com20020_status(struct net_device *dev) +{ + u_int ioaddr = dev->base_addr; + + return arcnet_inb(ioaddr, COM20020_REG_R_STATUS) + + (arcnet_inb(ioaddr, COM20020_REG_R_DIAGSTAT) << 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; + arcnet_outb(lp->config, ioaddr, COM20020_REG_W_CONFIG); +} + +/* 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)) + arc_printk(D_NORMAL, dev, "Setting promiscuous flag...\n"); + com20020_set_subaddress(lp, ioaddr, SUB_SETUP1); + lp->setup |= PROMISCset; + arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_XREG); + } else { + /* Disable promiscuous mode, use normal mode */ + if ((lp->setup & PROMISCset)) + arc_printk(D_NORMAL, dev, "Resetting promiscuous flag...\n"); + com20020_set_subaddress(lp, ioaddr, SUB_SETUP1); + lp->setup &= ~PROMISCset; + arcnet_outb(lp->setup, ioaddr, COM20020_REG_W_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) +{ + if (BUGLVL(D_NORMAL)) + pr_info("%s\n", "COM20020 chipset support (by David Woodhouse et al.)"); + return 0; +} + +static void __exit com20020_module_exit(void) +{ +} +module_init(com20020_module_init); +module_exit(com20020_module_exit); +#endif /* MODULE */ |