mvme147.c (5799B)
1// SPDX-License-Identifier: GPL-2.0-only 2/* mvme147.c : the Linux/mvme147/lance ethernet driver 3 * 4 * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk> 5 * Based on the Sun Lance driver and the NetBSD HP Lance driver 6 * 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 places 31 * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx 32 * buffers and 2 Tx buffers, it takes (8 + 2) * 1544 bytes. 33 */ 34#define LANCE_LOG_TX_BUFFERS 1 35#define LANCE_LOG_RX_BUFFERS 3 36 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 the 46 * 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 printk("%s: MVME147 at 0x%08lx, irq %d, Hardware Address %pM\n", 109 dev->name, dev->base_addr, MVME147_LANCE_IRQ, 110 dev->dev_addr); 111 112 lp = netdev_priv(dev); 113 lp->ram = __get_dma_pages(GFP_ATOMIC, 3); /* 32K */ 114 if (!lp->ram) { 115 printk("%s: No memory for LANCE buffers\n", dev->name); 116 free_netdev(dev); 117 return ERR_PTR(-ENOMEM); 118 } 119 120 lp->lance.name = name; 121 lp->lance.base = dev->base_addr; 122 lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */ 123 lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram); /* LANCE addr of same RAM */ 124 lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ 125 lp->lance.irq = MVME147_LANCE_IRQ; 126 lp->lance.writerap = (writerap_t)m147lance_writerap; 127 lp->lance.writerdp = (writerdp_t)m147lance_writerdp; 128 lp->lance.readrdp = (readrdp_t)m147lance_readrdp; 129 lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS; 130 lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS; 131 lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK; 132 lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK; 133 134 err = register_netdev(dev); 135 if (err) { 136 free_pages(lp->ram, 3); 137 free_netdev(dev); 138 return ERR_PTR(err); 139 } 140 141 return dev; 142} 143 144static void m147lance_writerap(struct lance_private *lp, unsigned short value) 145{ 146 out_be16(lp->base + LANCE_RAP, value); 147} 148 149static void m147lance_writerdp(struct lance_private *lp, unsigned short value) 150{ 151 out_be16(lp->base + LANCE_RDP, value); 152} 153 154static unsigned short m147lance_readrdp(struct lance_private *lp) 155{ 156 return in_be16(lp->base + LANCE_RDP); 157} 158 159static int m147lance_open(struct net_device *dev) 160{ 161 int status; 162 163 status = lance_open(dev); /* call generic lance open code */ 164 if (status) 165 return status; 166 /* enable interrupts at board level. */ 167 m147_pcc->lan_cntrl = 0; /* clear the interrupts (if any) */ 168 m147_pcc->lan_cntrl = 0x08 | 0x04; /* Enable irq 4 */ 169 170 return 0; 171} 172 173static int m147lance_close(struct net_device *dev) 174{ 175 /* disable interrupts at boardlevel */ 176 m147_pcc->lan_cntrl = 0x0; /* disable interrupts */ 177 lance_close(dev); 178 return 0; 179} 180 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);