/* hplance.c : the Linux/hp300/lance ethernet driver * * Copyright (C) 05/1998 Peter Maydell * Based on the Sun Lance driver and the NetBSD HP Lance driver * Uses the generic 7990.c LANCE code. */ #include #include #include #include #include #include #include #include #include #include /* Used for the temporal inet entries and routing */ #include #include #include #include #include #include #include #include #include #include "hplance.h" /* We have 16834 bytes of RAM for the init block and buffers. This places * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx * buffers and 2 Tx buffers. */ #define LANCE_LOG_TX_BUFFERS 1 #define LANCE_LOG_RX_BUFFERS 3 #include "7990.h" /* use generic LANCE code */ /* Our private data structure */ struct hplance_private { struct lance_private lance; unsigned int scode; void *base; }; /* function prototypes... This is easy because all the grot is in the * generic LANCE support. All we have to support is probing for boards, * plus board-specific init, open and close actions. * Oh, and we need to tell the generic code how to read and write LANCE registers... */ static void hplance_init(struct net_device *dev, int scode); static int hplance_open(struct net_device *dev); static int hplance_close(struct net_device *dev); static void hplance_writerap(void *priv, unsigned short value); static void hplance_writerdp(void *priv, unsigned short value); static unsigned short hplance_readrdp(void *priv); #ifdef MODULE static struct hplance_private *root_hplance_dev; #endif static void cleanup_card(struct net_device *dev) { struct hplance_private *lp = netdev_priv(dev); dio_unconfig_board(lp->scode); } /* Find all the HP Lance boards and initialise them... */ struct net_device * __init hplance_probe(int unit) { struct net_device *dev; if (!MACH_IS_HP300) return ERR_PTR(-ENODEV); dev = alloc_etherdev(sizeof(struct hplance_private)); if (!dev) return ERR_PTR(-ENOMEM); if (unit >= 0) { sprintf(dev->name, "eth%d", unit); netdev_boot_setup_check(dev); } SET_MODULE_OWNER(dev); /* Isn't DIO nice? */ for(;;) { int scode = dio_find(DIO_ID_LAN); if (!scode) break; dio_config_board(scode); hplance_init(dev, scode); if (!register_netdev(dev)) { struct hplance_private *lp = netdev_priv(dev); lp->next_module = root_hplance_dev; root_hplance_dev = lp; return dev; } cleanup_card(dev); } free_netdev(dev); return ERR_PTR(-ENODEV); } /* Initialise a single lance board at the given select code */ static void __init hplance_init(struct net_device *dev, int scode) { const char *name = dio_scodetoname(scode); void *va = dio_scodetoviraddr(scode); struct hplance_private *lp; int i; printk("%s: %s; select code %d, addr", dev->name, name, scode); /* reset the board */ out_8(va+DIO_IDOFF, 0xff); udelay(100); /* ariba! ariba! udelay! udelay! */ /* Fill the dev fields */ dev->base_addr = (unsigned long)va; dev->open = &hplance_open; dev->stop = &hplance_close; dev->hard_start_xmit = &lance_start_xmit; dev->get_stats = &lance_get_stats; dev->set_multicast_list = &lance_set_multicast; dev->dma = 0; for (i=0; i<6; i++) { /* The NVRAM holds our ethernet address, one nibble per byte, * at bytes NVRAMOFF+1,3,5,7,9... */ dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4) | (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF); printk("%c%2.2x", i == 0 ? ' ' : ':', dev->dev_addr[i]); } lp = netdev_priv(dev); lp->lance.name = (char*)name; /* discards const, shut up gcc */ lp->lance.ll = (struct lance_regs *)(va + HPLANCE_REGOFF); lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */ lp->lance.lance_init_block = 0; /* LANCE addr of same RAM */ lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ lp->lance.irq = dio_scodetoipl(scode); lp->lance.writerap = hplance_writerap; lp->lance.writerdp = hplance_writerdp; lp->lance.readrdp = hplance_readrdp; lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS; lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS; lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK; lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK; lp->scode = scode; lp->base = va; printk(", irq %d\n", lp->lance.irq); } /* This is disgusting. We have to check the DIO status register for ack every * time we read or write the LANCE registers. */ static void hplance_writerap(void *priv, unsigned short value) { struct hplance_private *lp = (struct hplance_private *)priv; struct hplance_reg *hpregs = (struct hplance_reg *)lp->base; do { lp->lance.ll->rap = value; } while ((hpregs->status & LE_ACK) == 0); } static void hplance_writerdp(void *priv, unsigned short value) { struct hplance_private *lp = (struct hplance_private *)priv; struct hplance_reg *hpregs = (struct hplance_reg *)lp->base; do { lp->lance.ll->rdp = value; } while ((hpregs->status & LE_ACK) == 0); } static unsigned short hplance_readrdp(void *priv) { unsigned short val; struct hplance_private *lp = (struct hplance_private *)priv; struct hplance_reg *hpregs = (struct hplance_reg *)lp->base; do { val = lp->lance.ll->rdp; } while ((hpregs->status & LE_ACK) == 0); return val; } static int hplance_open(struct net_device *dev) { int status; struct hplance_private *lp = netdev_priv(dev); struct hplance_reg *hpregs = (struct hplance_reg *)lp->base; status = lance_open(dev); /* call generic lance open code */ if (status) return status; /* enable interrupts at board level. */ out_8(&(hpregs->status), LE_IE); return 0; } static int hplance_close(struct net_device *dev) { struct hplance_private *lp = netdev_priv(dev); struct hplance_reg *hpregs = (struct hplance_reg *)lp->base; out_8(&(hpregs->status), 8); /* disable interrupts at boardlevel */ lance_close(dev); return 0; } #ifdef MODULE MODULE_LICENSE("GPL"); int init_module(void) { int found = 0; while (!IS_ERR(hplance_probe(-1))) found++; return found ? 0 : -ENODEV; } void cleanup_module(void) { /* Walk the chain of devices, unregistering them */ struct hplance_private *lp; while (root_hplance_dev) { lp = root_hplance_dev->next_module; unregister_netdev(root_lance_dev->dev); cleanup_card(root_lance_dev->dev); free_netdev(root_lance_dev->dev); root_lance_dev = lp; } } #endif /* MODULE */