/* * Linux ARCnet driver - "RIM I" (entirely mem-mapped) cards * * Written 1994-1999 by Avery Pennarun. * Written 1999-2000 by Martin Mares . * 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 #include #include #include #include #include #include #include #include #include #define VERSION "arcnet: RIM I (entirely mem-mapped) support\n" /* Internal function declarations */ static int arcrimi_probe(struct net_device *dev); static int arcrimi_found(struct net_device *dev); static void arcrimi_command(struct net_device *dev, int command); static int arcrimi_status(struct net_device *dev); static void arcrimi_setmask(struct net_device *dev, int mask); static int arcrimi_reset(struct net_device *dev, int really_reset); static void arcrimi_openclose(struct net_device *dev, bool open); static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset, void *buf, int count); static void arcrimi_copy_from_card(struct net_device *dev, int bufnum, int offset, void *buf, int count); /* Handy defines for ARCnet specific stuff */ /* Amount of I/O memory used by the card */ #define BUFFER_SIZE (512) #define MIRROR_SIZE (BUFFER_SIZE*4) /* COM 9026 controller chip --> ARCnet register addresses */ #define _INTMASK (ioaddr+0) /* writable */ #define _STATUS (ioaddr+0) /* readable */ #define _COMMAND (ioaddr+1) /* writable, returns random vals on read (?) */ #define _RESET (ioaddr+8) /* software reset (on read) */ #define _MEMDATA (ioaddr+12) /* Data port for IO-mapped memory */ #define _ADDR_HI (ioaddr+15) /* Control registers for said */ #define _ADDR_LO (ioaddr+14) #define _CONFIG (ioaddr+2) /* Configuration register */ #undef ASTATUS #undef ACOMMAND #undef AINTMASK #define ASTATUS() readb(_STATUS) #define ACOMMAND(cmd) writeb((cmd),_COMMAND) #define AINTMASK(msk) writeb((msk),_INTMASK) #define SETCONF() writeb(lp->config,_CONFIG) /* * We cannot probe for a RIM I card; one reason is I don't know how to reset * them. In fact, we can't even get their node ID automatically. So, we * need to be passed a specific shmem address, IRQ, and node ID. */ static int __init arcrimi_probe(struct net_device *dev) { BUGLVL(D_NORMAL) printk(VERSION); BUGLVL(D_NORMAL) printk("E-mail me if you actually test the RIM I driver, please!\n"); BUGMSG(D_NORMAL, "Given: node %02Xh, shmem %lXh, irq %d\n", dev->dev_addr[0], dev->mem_start, dev->irq); if (dev->mem_start <= 0 || dev->irq <= 0) { BUGMSG(D_NORMAL, "No autoprobe for RIM I; you " "must specify the shmem and irq!\n"); return -ENODEV; } if (check_mem_region(dev->mem_start, BUFFER_SIZE)) { BUGMSG(D_NORMAL, "Card memory already allocated\n"); return -ENODEV; } if (dev->dev_addr[0] == 0) { BUGMSG(D_NORMAL, "You need to specify your card's station " "ID!\n"); return -ENODEV; } return arcrimi_found(dev); } /* * Set up the struct net_device associated with this card. Called after * probing succeeds. */ static int __init arcrimi_found(struct net_device *dev) { struct arcnet_local *lp; u_long first_mirror, last_mirror, shmem; int mirror_size; /* reserve the irq */ { if (request_irq(dev->irq, &arcnet_interrupt, 0, "arcnet (RIM I)", dev)) BUGMSG(D_NORMAL, "Can't get IRQ %d!\n", dev->irq); return -ENODEV; } shmem = dev->mem_start; isa_writeb(TESTvalue, shmem); isa_writeb(dev->dev_addr[0], shmem + 1); /* actually the node ID */ /* find the real shared memory start/end points, including mirrors */ /* guess the actual size of one "memory mirror" - the number of * bytes between copies of the shared memory. On most cards, it's * 2k (or there are no mirrors at all) but on some, it's 4k. */ mirror_size = MIRROR_SIZE; if (isa_readb(shmem) == TESTvalue && isa_readb(shmem - mirror_size) != TESTvalue && isa_readb(shmem - 2 * mirror_size) == TESTvalue) mirror_size *= 2; first_mirror = last_mirror = shmem; while (isa_readb(first_mirror) == TESTvalue) first_mirror -= mirror_size; first_mirror += mirror_size; while (isa_readb(last_mirror) == TESTvalue) last_mirror += mirror_size; last_mirror -= mirror_size; dev->mem_start = first_mirror; dev->mem_end = last_mirror + MIRROR_SIZE - 1; dev->rmem_start = dev->mem_start + BUFFER_SIZE * 0; dev->rmem_end = dev->mem_start + BUFFER_SIZE * 2 - 1; /* initialize the rest of the device structure. */ lp = dev->priv = kmalloc(sizeof(struct arcnet_local), GFP_KERNEL); if (!lp) { BUGMSG(D_NORMAL, "Can't allocate device data!\n"); goto err_free_irq; } lp->card_name = "RIM I"; lp->hw.command = arcrimi_command; lp->hw.status = arcrimi_status; lp->hw.intmask = arcrimi_setmask; lp->hw.reset = arcrimi_reset; lp->hw.open_close = arcrimi_openclose; lp->hw.copy_to_card = arcrimi_copy_to_card; lp->hw.copy_from_card = arcrimi_copy_from_card; lp->mem_start = ioremap(dev->mem_start, dev->mem_end - dev->mem_start + 1); if (!lp->mem_start) { BUGMSG(D_NORMAL, "Can't remap device memory!\n"); goto err_free_dev_priv; } /* Fill in the fields of the device structure with generic * values. */ arcdev_setup(dev); /* get and check the station ID from offset 1 in shmem */ dev->dev_addr[0] = readb(lp->mem_start + 1); /* reserve the memory region - guaranteed to work by check_region */ request_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1, "arcnet (90xx)"); BUGMSG(D_NORMAL, "ARCnet RIM I: station %02Xh found at IRQ %d, " "ShMem %lXh (%ld*%d bytes).\n", dev->dev_addr[0], dev->irq, dev->mem_start, (dev->mem_end - dev->mem_start + 1) / mirror_size, mirror_size); return 0; err_free_dev_priv: kfree(dev->priv); err_free_irq: free_irq(dev->irq, dev); return -EIO; } /* * 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 arcrimi_reset(struct net_device *dev, int really_reset) { struct arcnet_local *lp = (struct arcnet_local *) dev->priv; void *ioaddr = lp->mem_start + 0x800; BUGMSG(D_INIT, "Resetting %s (status=%02Xh)\n", dev->name, ASTATUS()); if (really_reset) { writeb(TESTvalue, ioaddr - 0x800); /* fake reset */ return 0; } ACOMMAND(CFLAGScmd | RESETclear); /* clear flags & end reset */ ACOMMAND(CFLAGScmd | CONFIGclear); /* enable extended (512-byte) packets */ ACOMMAND(CONFIGcmd | EXTconf); /* done! return success. */ return 0; } static void arcrimi_openclose(struct net_device *dev, int open) { if (open) MOD_INC_USE_COUNT; else MOD_DEC_USE_COUNT; } static void arcrimi_setmask(struct net_device *dev, int mask) { struct arcnet_local *lp = (struct arcnet_local *) dev->priv; void *ioaddr = lp->mem_start + 0x800; AINTMASK(mask); } static int arcrimi_status(struct net_device *dev) { struct arcnet_local *lp = (struct arcnet_local *) dev->priv; void *ioaddr = lp->mem_start + 0x800; return ASTATUS(); } static void arcrimi_command(struct net_device *dev, int cmd) { struct arcnet_local *lp = (struct arcnet_local *) dev->priv; void *ioaddr = lp->mem_start + 0x800; ACOMMAND(cmd); } static void arcrimi_copy_to_card(struct net_device *dev, int bufnum, int offset, void *buf, int count) { struct arcnet_local *lp = (struct arcnet_local *) dev->priv; void *memaddr = lp->mem_start + 0x800 + bufnum * 512 + offset; TIME("memcpy_toio", count, memcpy_toio(memaddr, buf, count)); } static void arcrimi_copy_from_card(struct net_device *dev, int bufnum, int offset, void *buf, int count) { struct arcnet_local *lp = (struct arcnet_local *) dev->priv; void *memaddr = lp->mem_start + 0x800 + bufnum * 512 + offset; TIME("memcpy_fromio", count, memcpy_fromio(buf, memaddr, count)); } #ifdef MODULE static struct net_device *my_dev; /* Module parameters */ static int node = 0; static int io = 0x0; /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */ static int irq = 0; /* or use the insmod io= irq= shmem= options */ static char *device; /* use eg. device="arc1" to change name */ MODULE_PARM(node, "i"); MODULE_PARM(io, "i"); MODULE_PARM(irq, "i"); MODULE_PARM(device, "s"); MODULE_LICENSE("GPL"); int init_module(void) { struct net_device *dev; int err; dev = dev_alloc(device ? : "arc%d", &err); if (!dev) return err; if (node && node != 0xff) dev->dev_addr[0] = node; dev->base_addr = io; dev->irq = irq; if (dev->irq == 2) dev->irq = 9; if (arcrimi_probe(dev)) return -EIO; my_dev = dev; return 0; } void cleanup_module(void) { struct net_device *dev = my_dev; struct arcnet_local *lp = (struct arcnet_local *) dev->priv; unregister_netdev(dev); free_irq(dev->irq, dev); iounmap(lp->mem_start); release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1); kfree(dev->priv); kfree(dev); } #else static int __init arcrimi_setup(char *s) { struct net_device *dev; int ints[8]; s = get_options(s, 8, ints); if (!ints[0]) return 1; dev = alloc_bootmem(sizeof(struct net_device)); memset(dev, 0, sizeof(struct net_device)); dev->init = arcrimi_probe; switch (ints[0]) { default: /* ERROR */ printk("arcrimi: Too many arguments.\n"); case 3: /* Node ID */ dev->dev_addr[0] = ints[3]; case 2: /* IRQ */ dev->irq = ints[2]; case 1: /* IO address */ dev->mem_start = ints[1]; } if (*s) strncpy(dev->name, s, 9); else strcpy(dev->name, "arc%d"); if (register_netdev(dev)) printk(KERN_ERR "arc-rimi: Cannot register arcnet device\n"); return 1; } __setup("arcrimi=", arcrimi_setup); #endif /* MODULE */