/* hplance.c : the Linux/hp300/lance ethernet driver * * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk> * Based on the Sun Lance driver and the NetBSD HP Lance driver * Uses the generic 7990.c LANCE code. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/interrupt.h> #include <linux/ioport.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/errno.h> /* Used for the temporal inet entries and routing */ #include <linux/socket.h> #include <linux/route.h> #include <linux/dio.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/skbuff.h> #include <asm/system.h> #include <asm/io.h> #include <asm/pgtable.h> #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; }; /* 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 int __devinit hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent); static void __devinit hplance_init(struct net_device *dev, struct dio_dev *d); static void __devexit hplance_remove_one(struct dio_dev *d); 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); static int hplance_open(struct net_device *dev); static int hplance_close(struct net_device *dev); static struct dio_device_id hplance_dio_tbl[] = { { DIO_ID_LAN }, { 0 } }; static struct dio_driver hplance_driver = { .name = "hplance", .id_table = hplance_dio_tbl, .probe = hplance_init_one, .remove = __devexit_p(hplance_remove_one), }; /* Find all the HP Lance boards and initialise them... */ static int __devinit hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent) { struct net_device *dev; int err = -ENOMEM; dev = alloc_etherdev(sizeof(struct hplance_private)); if (!dev) goto out; err = -EBUSY; if (!request_mem_region(dio_resource_start(d), dio_resource_len(d), d->name)) goto out_free_netdev; hplance_init(dev, d); err = register_netdev(dev); if (err) goto out_release_mem_region; dio_set_drvdata(d, dev); return 0; out_release_mem_region: release_mem_region(dio_resource_start(d), dio_resource_len(d)); out_free_netdev: free_netdev(dev); out: return err; } static void __devexit hplance_remove_one(struct dio_dev *d) { struct net_device *dev = dio_get_drvdata(d); unregister_netdev(dev); release_mem_region(dio_resource_start(d), dio_resource_len(d)); free_netdev(dev); } /* Initialise a single lance board at the given DIO device */ static void __init hplance_init(struct net_device *dev, struct dio_dev *d) { unsigned long va = (d->resource.start + DIO_VIRADDRBASE); struct hplance_private *lp; int i; printk(KERN_INFO "%s: %s; select code %d, addr", dev->name, d->name, d->scode); /* reset the board */ out_8(va+DIO_IDOFF, 0xff); udelay(100); /* ariba! ariba! udelay! udelay! */ /* Fill the dev fields */ dev->base_addr = va; dev->open = &hplance_open; dev->stop = &hplance_close; #ifdef CONFIG_NET_POLL_CONTROLLER dev->poll_controller = lance_poll; #endif 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*)d->name; /* discards const, shut up gcc */ lp->lance.base = va; 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 = d->ipl; 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; 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 lance_private *lp = (struct lance_private *)priv; do { out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value); } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); } static void hplance_writerdp(void *priv, unsigned short value) { struct lance_private *lp = (struct lance_private *)priv; do { out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value); } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); } static unsigned short hplance_readrdp(void *priv) { struct lance_private *lp = (struct lance_private *)priv; __u16 value; do { value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP); } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); return value; } static int hplance_open(struct net_device *dev) { int status; struct lance_private *lp = netdev_priv(dev); status = lance_open(dev); /* call generic lance open code */ if (status) return status; /* enable interrupts at board level. */ out_8(lp->base + HPLANCE_STATUS, LE_IE); return 0; } static int hplance_close(struct net_device *dev) { struct lance_private *lp = netdev_priv(dev); out_8(lp->base + HPLANCE_STATUS, 0); /* disable interrupts at boardlevel */ lance_close(dev); return 0; } int __init hplance_init_module(void) { return dio_module_init(&hplance_driver); } void __exit hplance_cleanup_module(void) { dio_unregister_driver(&hplance_driver); } module_init(hplance_init_module); module_exit(hplance_cleanup_module); MODULE_LICENSE("GPL");