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1// SPDX-License-Identifier: GPL-2.0-only2/* mvme147.c : the Linux/mvme147/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/gfp.h>19#include <linux/pgtable.h>20/* Used for the temporal inet entries and routing */21#include <linux/socket.h>22#include <linux/route.h>23#include <linux/netdevice.h>24#include <linux/etherdevice.h>25#include <linux/skbuff.h>26 27#include <asm/io.h>28#include <asm/mvme147hw.h>29 30/* We have 32K of RAM for the init block and buffers. This places31 * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx32 * buffers and 2 Tx buffers, it takes (8 + 2) * 1544 bytes.33 */34#define LANCE_LOG_TX_BUFFERS 135#define LANCE_LOG_RX_BUFFERS 336 37#include "7990.h" /* use generic LANCE code */38 39/* Our private data structure */40struct m147lance_private {41 struct lance_private lance;42 unsigned long ram;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 m147lance_open(struct net_device *dev);51static int m147lance_close(struct net_device *dev);52static void m147lance_writerap(struct lance_private *lp, unsigned short value);53static void m147lance_writerdp(struct lance_private *lp, unsigned short value);54static unsigned short m147lance_readrdp(struct lance_private *lp);55 56typedef void (*writerap_t)(void *, unsigned short);57typedef void (*writerdp_t)(void *, unsigned short);58typedef unsigned short (*readrdp_t)(void *);59 60static const struct net_device_ops lance_netdev_ops = {61 .ndo_open = m147lance_open,62 .ndo_stop = m147lance_close,63 .ndo_start_xmit = lance_start_xmit,64 .ndo_set_rx_mode = lance_set_multicast,65 .ndo_tx_timeout = lance_tx_timeout,66 .ndo_validate_addr = eth_validate_addr,67 .ndo_set_mac_address = eth_mac_addr,68};69 70/* Initialise the one and only on-board 7990 */71static struct net_device * __init mvme147lance_probe(void)72{73 struct net_device *dev;74 static int called;75 static const char name[] = "MVME147 LANCE";76 struct m147lance_private *lp;77 u8 macaddr[ETH_ALEN];78 u_long *addr;79 u_long address;80 int err;81 82 if (!MACH_IS_MVME147 || called)83 return ERR_PTR(-ENODEV);84 called++;85 86 dev = alloc_etherdev(sizeof(struct m147lance_private));87 if (!dev)88 return ERR_PTR(-ENOMEM);89 90 /* Fill the dev fields */91 dev->base_addr = (unsigned long)MVME147_LANCE_BASE;92 dev->netdev_ops = &lance_netdev_ops;93 dev->dma = 0;94 95 addr = (u_long *)ETHERNET_ADDRESS;96 address = *addr;97 macaddr[0] = 0x08;98 macaddr[1] = 0x00;99 macaddr[2] = 0x3e;100 address = address >> 8;101 macaddr[5] = address&0xff;102 address = address >> 8;103 macaddr[4] = address&0xff;104 address = address >> 8;105 macaddr[3] = address&0xff;106 eth_hw_addr_set(dev, macaddr);107 108 lp = netdev_priv(dev);109 lp->ram = __get_dma_pages(GFP_ATOMIC, 3); /* 32K */110 if (!lp->ram) {111 printk("%s: No memory for LANCE buffers\n", dev->name);112 free_netdev(dev);113 return ERR_PTR(-ENOMEM);114 }115 116 lp->lance.name = name;117 lp->lance.base = dev->base_addr;118 lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */119 lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram); /* LANCE addr of same RAM */120 lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */121 lp->lance.irq = MVME147_LANCE_IRQ;122 lp->lance.writerap = (writerap_t)m147lance_writerap;123 lp->lance.writerdp = (writerdp_t)m147lance_writerdp;124 lp->lance.readrdp = (readrdp_t)m147lance_readrdp;125 lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;126 lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;127 lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;128 lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;129 130 err = register_netdev(dev);131 if (err) {132 free_pages(lp->ram, 3);133 free_netdev(dev);134 return ERR_PTR(err);135 }136 137 netdev_info(dev, "MVME147 at 0x%08lx, irq %d, Hardware Address %pM\n",138 dev->base_addr, MVME147_LANCE_IRQ, dev->dev_addr);139 140 return dev;141}142 143static void m147lance_writerap(struct lance_private *lp, unsigned short value)144{145 out_be16(lp->base + LANCE_RAP, value);146}147 148static void m147lance_writerdp(struct lance_private *lp, unsigned short value)149{150 out_be16(lp->base + LANCE_RDP, value);151}152 153static unsigned short m147lance_readrdp(struct lance_private *lp)154{155 return in_be16(lp->base + LANCE_RDP);156}157 158static int m147lance_open(struct net_device *dev)159{160 int status;161 162 status = lance_open(dev); /* call generic lance open code */163 if (status)164 return status;165 /* enable interrupts at board level. */166 m147_pcc->lan_cntrl = 0; /* clear the interrupts (if any) */167 m147_pcc->lan_cntrl = 0x08 | 0x04; /* Enable irq 4 */168 169 return 0;170}171 172static int m147lance_close(struct net_device *dev)173{174 /* disable interrupts at boardlevel */175 m147_pcc->lan_cntrl = 0x0; /* disable interrupts */176 lance_close(dev);177 return 0;178}179 180MODULE_DESCRIPTION("MVME147 LANCE Ethernet driver");181MODULE_LICENSE("GPL");182 183static struct net_device *dev_mvme147_lance;184static int __init m147lance_init(void)185{186 dev_mvme147_lance = mvme147lance_probe();187 return PTR_ERR_OR_ZERO(dev_mvme147_lance);188}189module_init(m147lance_init);190 191static void __exit m147lance_exit(void)192{193 struct m147lance_private *lp = netdev_priv(dev_mvme147_lance);194 unregister_netdev(dev_mvme147_lance);195 free_pages(lp->ram, 3);196 free_netdev(dev_mvme147_lance);197}198module_exit(m147lance_exit);199