首先是平台设备的register和unregister. 点击(此处)折叠或打开 /* * Search DM9000 board, allocate space and register it */static int __devinitdm9000_probe(struct platform_device *pdev){ struct dm9000_plat_data *pdata = pdev->dev.platform_data; struct board_info *db; /* Point a board information structure */ struct net_device *ndev; const unsigned char *mac_src; int ret = 0; int iosize; int i; u32 id_val; /* Init network device */ ndev = alloc_etherdev(sizeof(struct board_info)); if (!ndev) { dev_err(&pdev->dev, "could not allocate device.n"); return -ENOMEM; } SET_NETDEV_DEV(ndev, &pdev->dev); dev_dbg(&pdev->dev, "dm9000_probe()n"); /* setup board info structure */ db = netdev_priv(ndev); db->dev = &pdev->dev; db->ndev = ndev; spin_lock_init(&db->lock); mutex_init(&db->addr_lock); INIT_DELAYED_WORK(&db->phy_poll, dm9000_poll_work); db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (db->addr_res == NULL || db->data_res == NULL || db->irq_res == NULL) { dev_err(db->dev, "insufficient resourcesn"); ret = -ENOENT; goto out; } iosize = resource_size(db->addr_res); db->addr_req = request_mem_region(db->addr_res->start, iosize, pdev->name); if (db->addr_req == NULL) { dev_err(db->dev, "cannot claim address reg arean"); ret = -EIO; goto out; } db->io_addr = ioremap(db->addr_res->start, iosize); if (db->io_addr == NULL) { dev_err(db->dev, "failed to ioremap address regn"); ret = -EINVAL; goto out; } iosize = resource_size(db->data_res); db->data_req = request_mem_region(db->data_res->start, iosize, pdev->name); if (db->data_req == NULL) { dev_err(db->dev, "cannot claim data reg arean"); ret = -EIO; goto out; } db->io_data = ioremap(db->data_res->start, iosize); if (db->io_data == NULL) { dev_err(db->dev, "failed to ioremap data regn"); ret = -EINVAL; goto out; } /* fill in parameters for net-dev structure */ ndev->base_addr = (unsigned long)db->io_addr; ndev->irq = db->irq_res->start; /* ensure at least we have a default set of IO routines */ dm9000_set_io(db, iosize); /* check to see if anything is being over-ridden */ if (pdata != NULL) { /* check to see if the driver wants to over-ride the * default IO width */ if (pdata->flags & DM9000_PLATF_8BITONLY) dm9000_set_io(db, 1); if (pdata->flags & DM9000_PLATF_16BITONLY) dm9000_set_io(db, 2); if (pdata->flags & DM9000_PLATF_32BITONLY) dm9000_set_io(db, 4); /* check to see if there are any IO routine * over-rides */ if (pdata->inblk != NULL) db->inblk = pdata->inblk; if (pdata->outblk != NULL) db->outblk = pdata->outblk; if (pdata->dumpblk != NULL) db->dumpblk = pdata->dumpblk; db->flags = pdata->flags; }#ifdef CONFIG_DM9000_FORCE_SIMPLE_PHY_POLL db->flags |= DM9000_PLATF_SIMPLE_PHY;#endif dm9000_reset(db); /* try multiple times, DM9000 sometimes gets the read wrong */ for (i = 0; i < 8; i++) { id_val = ior(db, DM9000_VIDL); id_val |= (u32)ior(db, DM9000_VIDH) << 8; id_val |= (u32)ior(db, DM9000_PIDL) << 16; id_val |= (u32)ior(db, DM9000_PIDH) << 24; if (id_val == DM9000_ID) break; dev_err(db->dev, "read wrong id 0x%08xn", id_val); } if (id_val != DM9000_ID) { dev_err(db->dev, "wrong id: 0x%08xn", id_val); ret = -ENODEV; goto out; } /* Identify what type of DM9000 we are working on */ id_val = ior(db, DM9000_CHIPR); dev_dbg(db->dev, "dm9000 revision 0x%02xn", id_val); switch (id_val) { case CHIPR_DM9000A: db->type = TYPE_DM9000A; break; case CHIPR_DM9000B: db->type = TYPE_DM9000B; break; default: dev_dbg(db->dev, "ID %02x => defaulting to DM9000En", id_val); db->type = TYPE_DM9000E; } /* dm9000a/b are capable of hardware checksum offload */ if (db->type == TYPE_DM9000A || db->type == TYPE_DM9000B) { db->can_csum = 1; db->rx_csum = 1; ndev->features |= NETIF_F_IP_CSUM; } /* from this point we assume that we have found a DM9000 */ /* driver system function */ ether_setup(ndev); ndev->netdev_ops = &dm9000_netdev_ops; ndev->watchdog_timeo = msecs_to_jiffies(watchdog); ndev->ethtool_ops = &dm9000_ethtool_ops;// db->msg_enable = NETIF_MSG_LINK; db->msg_enable = 0xffff; db->mii.phy_id_mask = 0x1f; db->mii.reg_num_mask = 0x1f; db->mii.force_media = 0; db->mii.full_duplex = 0; db->mii.dev = ndev; db->mii.mdio_read = dm9000_phy_read; db->mii.mdio_write = dm9000_phy_write; mac_src = "eeprom"; /* try reading the node address from the attached EEPROM */ for (i = 0; i < 6; i += 2) dm9000_read_eeprom(db, i / 2, ndev->dev_addr+i); if (!is_valid_ether_addr(ndev->dev_addr) && pdata != NULL) { mac_src = "platform data"; memcpy(ndev->dev_addr, pdata->dev_addr, 6); } if (!is_valid_ether_addr(ndev->dev_addr)) { /* try reading from mac */ mac_src = "chip"; for (i = 0; i < 6; i++) ndev->dev_addr[i] = ior(db, i+DM9000_PAR); } memcpy(ndev->dev_addr, "x08x90x90x90x90x90", 6); if (!is_valid_ether_addr(ndev->dev_addr)) dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please " "set using ifconfign", ndev->name); platform_set_drvdata(pdev, ndev); ret = register_netdev(ndev); if (ret == 0) printk(KERN_INFO "%s: dm9000%c at %p,%p IRQ %d MAC: %pM (%s)n", ndev->name, dm9000_type_to_char(db->type), db->io_addr, db->io_data, ndev->irq, ndev->dev_addr, mac_src); return 0;out: dev_err(db->dev, "not found (%d).n", ret); dm9000_release_board(pdev, db); free_netdev(ndev); return ret;}
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