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232 lines
6.5 KiB
232 lines
6.5 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* hplance.c : the Linux/hp300/lance ethernet driver |
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* |
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* Copyright (C) 05/1998 Peter Maydell <[email protected]> |
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* Based on the Sun Lance driver and the NetBSD HP Lance driver |
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* Uses the generic 7990.c LANCE code. |
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*/ |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/interrupt.h> |
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#include <linux/ioport.h> |
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#include <linux/string.h> |
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#include <linux/delay.h> |
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#include <linux/init.h> |
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#include <linux/errno.h> |
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#include <linux/pgtable.h> |
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/* Used for the temporal inet entries and routing */ |
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#include <linux/socket.h> |
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#include <linux/route.h> |
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#include <linux/dio.h> |
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#include <linux/netdevice.h> |
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#include <linux/etherdevice.h> |
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#include <linux/skbuff.h> |
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#include <asm/io.h> |
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#include "hplance.h" |
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/* We have 16392 bytes of RAM for the init block and buffers. This places |
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* an upper limit on the number of buffers we can use. NetBSD uses 8 Rx |
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* buffers and 2 Tx buffers, it takes (8 + 2) * 1544 bytes. |
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*/ |
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#define LANCE_LOG_TX_BUFFERS 1 |
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#define LANCE_LOG_RX_BUFFERS 3 |
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#include "7990.h" /* use generic LANCE code */ |
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/* Our private data structure */ |
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struct hplance_private { |
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struct lance_private lance; |
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}; |
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/* function prototypes... This is easy because all the grot is in the |
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* generic LANCE support. All we have to support is probing for boards, |
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* plus board-specific init, open and close actions. |
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* Oh, and we need to tell the generic code how to read and write LANCE registers... |
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*/ |
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static int hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent); |
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static void hplance_init(struct net_device *dev, struct dio_dev *d); |
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static void hplance_remove_one(struct dio_dev *d); |
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static void hplance_writerap(void *priv, unsigned short value); |
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static void hplance_writerdp(void *priv, unsigned short value); |
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static unsigned short hplance_readrdp(void *priv); |
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static int hplance_open(struct net_device *dev); |
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static int hplance_close(struct net_device *dev); |
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static struct dio_device_id hplance_dio_tbl[] = { |
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{ DIO_ID_LAN }, |
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{ 0 } |
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}; |
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static struct dio_driver hplance_driver = { |
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.name = "hplance", |
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.id_table = hplance_dio_tbl, |
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.probe = hplance_init_one, |
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.remove = hplance_remove_one, |
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}; |
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static const struct net_device_ops hplance_netdev_ops = { |
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.ndo_open = hplance_open, |
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.ndo_stop = hplance_close, |
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.ndo_start_xmit = lance_start_xmit, |
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.ndo_set_rx_mode = lance_set_multicast, |
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.ndo_validate_addr = eth_validate_addr, |
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.ndo_set_mac_address = eth_mac_addr, |
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#ifdef CONFIG_NET_POLL_CONTROLLER |
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.ndo_poll_controller = lance_poll, |
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#endif |
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}; |
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/* Find all the HP Lance boards and initialise them... */ |
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static int hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent) |
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{ |
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struct net_device *dev; |
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int err = -ENOMEM; |
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dev = alloc_etherdev(sizeof(struct hplance_private)); |
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if (!dev) |
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goto out; |
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err = -EBUSY; |
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if (!request_mem_region(dio_resource_start(d), |
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dio_resource_len(d), d->name)) |
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goto out_free_netdev; |
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hplance_init(dev, d); |
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err = register_netdev(dev); |
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if (err) |
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goto out_release_mem_region; |
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dio_set_drvdata(d, dev); |
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printk(KERN_INFO "%s: %s; select code %d, addr %pM, irq %d\n", |
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dev->name, d->name, d->scode, dev->dev_addr, d->ipl); |
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return 0; |
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out_release_mem_region: |
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release_mem_region(dio_resource_start(d), dio_resource_len(d)); |
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out_free_netdev: |
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free_netdev(dev); |
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out: |
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return err; |
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} |
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static void hplance_remove_one(struct dio_dev *d) |
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{ |
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struct net_device *dev = dio_get_drvdata(d); |
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unregister_netdev(dev); |
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release_mem_region(dio_resource_start(d), dio_resource_len(d)); |
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free_netdev(dev); |
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} |
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/* Initialise a single lance board at the given DIO device */ |
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static void hplance_init(struct net_device *dev, struct dio_dev *d) |
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{ |
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unsigned long va = (d->resource.start + DIO_VIRADDRBASE); |
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struct hplance_private *lp; |
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int i; |
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/* reset the board */ |
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out_8(va + DIO_IDOFF, 0xff); |
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udelay(100); /* ariba! ariba! udelay! udelay! */ |
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/* Fill the dev fields */ |
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dev->base_addr = va; |
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dev->netdev_ops = &hplance_netdev_ops; |
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dev->dma = 0; |
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for (i = 0; i < 6; i++) { |
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/* The NVRAM holds our ethernet address, one nibble per byte, |
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* at bytes NVRAMOFF+1,3,5,7,9... |
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*/ |
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dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4) |
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| (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF); |
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} |
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lp = netdev_priv(dev); |
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lp->lance.name = d->name; |
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lp->lance.base = va; |
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lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */ |
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lp->lance.lance_init_block = NULL; /* LANCE addr of same RAM */ |
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lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ |
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lp->lance.irq = d->ipl; |
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lp->lance.writerap = hplance_writerap; |
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lp->lance.writerdp = hplance_writerdp; |
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lp->lance.readrdp = hplance_readrdp; |
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lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS; |
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lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS; |
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lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK; |
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lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK; |
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} |
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/* This is disgusting. We have to check the DIO status register for ack every |
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* time we read or write the LANCE registers. |
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*/ |
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static void hplance_writerap(void *priv, unsigned short value) |
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{ |
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struct lance_private *lp = (struct lance_private *)priv; |
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do { |
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out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value); |
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} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); |
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} |
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static void hplance_writerdp(void *priv, unsigned short value) |
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{ |
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struct lance_private *lp = (struct lance_private *)priv; |
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do { |
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out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value); |
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} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); |
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} |
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static unsigned short hplance_readrdp(void *priv) |
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{ |
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struct lance_private *lp = (struct lance_private *)priv; |
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__u16 value; |
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do { |
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value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP); |
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} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); |
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return value; |
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} |
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static int hplance_open(struct net_device *dev) |
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{ |
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int status; |
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struct lance_private *lp = netdev_priv(dev); |
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status = lance_open(dev); /* call generic lance open code */ |
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if (status) |
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return status; |
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/* enable interrupts at board level. */ |
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out_8(lp->base + HPLANCE_STATUS, LE_IE); |
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return 0; |
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} |
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static int hplance_close(struct net_device *dev) |
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{ |
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struct lance_private *lp = netdev_priv(dev); |
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out_8(lp->base + HPLANCE_STATUS, 0); /* disable interrupts at boardlevel */ |
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lance_close(dev); |
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return 0; |
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} |
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static int __init hplance_init_module(void) |
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{ |
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return dio_register_driver(&hplance_driver); |
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} |
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static void __exit hplance_cleanup_module(void) |
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{ |
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dio_unregister_driver(&hplance_driver); |
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} |
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module_init(hplance_init_module); |
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module_exit(hplance_cleanup_module); |
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MODULE_LICENSE("GPL");
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