diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/net/hplance.c |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/net/hplance.c')
-rw-r--r-- | drivers/net/hplance.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/drivers/net/hplance.c b/drivers/net/hplance.c new file mode 100644 index 000000000000..08703d6f934c --- /dev/null +++ b/drivers/net/hplance.c @@ -0,0 +1,231 @@ +/* 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"); |