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1// SPDX-License-Identifier: GPL-2.0-only2/* hplance.c : the Linux/hp300/lance ethernet driver3 *4 * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>5 * Based on the Sun Lance driver and the NetBSD HP Lance driver6 * Uses the generic 7990.c LANCE code.7 */8 9#include <linux/module.h>10#include <linux/kernel.h>11#include <linux/types.h>12#include <linux/interrupt.h>13#include <linux/ioport.h>14#include <linux/string.h>15#include <linux/delay.h>16#include <linux/init.h>17#include <linux/errno.h>18#include <linux/pgtable.h>19/* Used for the temporal inet entries and routing */20#include <linux/socket.h>21#include <linux/route.h>22#include <linux/dio.h>23#include <linux/netdevice.h>24#include <linux/etherdevice.h>25#include <linux/skbuff.h>26 27#include <asm/io.h>28 29#include "hplance.h"30 31/* We have 16392 bytes of RAM for the init block and buffers. This places32 * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx33 * buffers and 2 Tx buffers, it takes (8 + 2) * 1544 bytes.34 */35#define LANCE_LOG_TX_BUFFERS 136#define LANCE_LOG_RX_BUFFERS 337 38#include "7990.h" /* use generic LANCE code */39 40/* Our private data structure */41struct hplance_private {42 struct lance_private lance;43};44 45/* function prototypes... This is easy because all the grot is in the46 * generic LANCE support. All we have to support is probing for boards,47 * plus board-specific init, open and close actions.48 * Oh, and we need to tell the generic code how to read and write LANCE registers...49 */50static int hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent);51static void hplance_init(struct net_device *dev, struct dio_dev *d);52static void hplance_remove_one(struct dio_dev *d);53static void hplance_writerap(void *priv, unsigned short value);54static void hplance_writerdp(void *priv, unsigned short value);55static unsigned short hplance_readrdp(void *priv);56static int hplance_open(struct net_device *dev);57static int hplance_close(struct net_device *dev);58 59static struct dio_device_id hplance_dio_tbl[] = {60 { DIO_ID_LAN },61 { 0 }62};63 64static struct dio_driver hplance_driver = {65 .name = "hplance",66 .id_table = hplance_dio_tbl,67 .probe = hplance_init_one,68 .remove = hplance_remove_one,69};70 71static const struct net_device_ops hplance_netdev_ops = {72 .ndo_open = hplance_open,73 .ndo_stop = hplance_close,74 .ndo_start_xmit = lance_start_xmit,75 .ndo_set_rx_mode = lance_set_multicast,76 .ndo_validate_addr = eth_validate_addr,77 .ndo_set_mac_address = eth_mac_addr,78#ifdef CONFIG_NET_POLL_CONTROLLER79 .ndo_poll_controller = lance_poll,80#endif81};82 83/* Find all the HP Lance boards and initialise them... */84static int hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent)85{86 struct net_device *dev;87 int err = -ENOMEM;88 89 dev = alloc_etherdev(sizeof(struct hplance_private));90 if (!dev)91 goto out;92 93 err = -EBUSY;94 if (!request_mem_region(dio_resource_start(d),95 dio_resource_len(d), d->name))96 goto out_free_netdev;97 98 hplance_init(dev, d);99 err = register_netdev(dev);100 if (err)101 goto out_release_mem_region;102 103 dio_set_drvdata(d, dev);104 105 printk(KERN_INFO "%s: %s; select code %d, addr %pM, irq %d\n",106 dev->name, d->name, d->scode, dev->dev_addr, d->ipl);107 108 return 0;109 110 out_release_mem_region:111 release_mem_region(dio_resource_start(d), dio_resource_len(d));112 out_free_netdev:113 free_netdev(dev);114 out:115 return err;116}117 118static void hplance_remove_one(struct dio_dev *d)119{120 struct net_device *dev = dio_get_drvdata(d);121 122 unregister_netdev(dev);123 release_mem_region(dio_resource_start(d), dio_resource_len(d));124 free_netdev(dev);125}126 127/* Initialise a single lance board at the given DIO device */128static void hplance_init(struct net_device *dev, struct dio_dev *d)129{130 unsigned long va = (d->resource.start + DIO_VIRADDRBASE);131 struct hplance_private *lp;132 u8 addr[ETH_ALEN];133 int i;134 135 /* reset the board */136 out_8(va + DIO_IDOFF, 0xff);137 udelay(100); /* ariba! ariba! udelay! udelay! */138 139 /* Fill the dev fields */140 dev->base_addr = va;141 dev->netdev_ops = &hplance_netdev_ops;142 dev->dma = 0;143 144 for (i = 0; i < 6; i++) {145 /* The NVRAM holds our ethernet address, one nibble per byte,146 * at bytes NVRAMOFF+1,3,5,7,9...147 */148 addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4)149 | (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF);150 }151 eth_hw_addr_set(dev, addr);152 153 lp = netdev_priv(dev);154 lp->lance.name = d->name;155 lp->lance.base = va;156 lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */157 lp->lance.lance_init_block = NULL; /* LANCE addr of same RAM */158 lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */159 lp->lance.irq = d->ipl;160 lp->lance.writerap = hplance_writerap;161 lp->lance.writerdp = hplance_writerdp;162 lp->lance.readrdp = hplance_readrdp;163 lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;164 lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;165 lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;166 lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;167}168 169/* This is disgusting. We have to check the DIO status register for ack every170 * time we read or write the LANCE registers.171 */172static void hplance_writerap(void *priv, unsigned short value)173{174 struct lance_private *lp = (struct lance_private *)priv;175 176 do {177 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);178 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);179}180 181static void hplance_writerdp(void *priv, unsigned short value)182{183 struct lance_private *lp = (struct lance_private *)priv;184 185 do {186 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);187 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);188}189 190static unsigned short hplance_readrdp(void *priv)191{192 struct lance_private *lp = (struct lance_private *)priv;193 __u16 value;194 195 do {196 value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);197 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);198 return value;199}200 201static int hplance_open(struct net_device *dev)202{203 int status;204 struct lance_private *lp = netdev_priv(dev);205 206 status = lance_open(dev); /* call generic lance open code */207 if (status)208 return status;209 /* enable interrupts at board level. */210 out_8(lp->base + HPLANCE_STATUS, LE_IE);211 212 return 0;213}214 215static int hplance_close(struct net_device *dev)216{217 struct lance_private *lp = netdev_priv(dev);218 219 out_8(lp->base + HPLANCE_STATUS, 0); /* disable interrupts at boardlevel */220 lance_close(dev);221 return 0;222}223 224static int __init hplance_init_module(void)225{226 return dio_register_driver(&hplance_driver);227}228 229static void __exit hplance_cleanup_module(void)230{231 dio_unregister_driver(&hplance_driver);232}233 234module_init(hplance_init_module);235module_exit(hplance_cleanup_module);236 237MODULE_DESCRIPTION("HP300 on-board LANCE Ethernet driver");238MODULE_LICENSE("GPL");239