1/* mvme147.c : the Linux/mvme147/lance ethernet driver 2 * 3 * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk> 4 * Based on the Sun Lance driver and the NetBSD HP Lance driver 5 * Uses the generic 7990.c LANCE code. 6 */ 7 8#include <linux/module.h> 9#include <linux/kernel.h> 10#include <linux/types.h> 11#include <linux/interrupt.h> 12#include <linux/ioport.h> 13#include <linux/string.h> 14#include <linux/delay.h> 15#include <linux/init.h> 16#include <linux/errno.h> 17#include <linux/gfp.h> 18/* Used for the temporal inet entries and routing */ 19#include <linux/socket.h> 20#include <linux/route.h> 21#include <linux/netdevice.h> 22#include <linux/etherdevice.h> 23#include <linux/skbuff.h> 24 25#include <asm/io.h> 26#include <asm/pgtable.h> 27#include <asm/mvme147hw.h> 28 29/* We have 16834 bytes of RAM for the init block and buffers. This places 30 * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx 31 * buffers and 2 Tx buffers. 32 */ 33#define LANCE_LOG_TX_BUFFERS 1 34#define LANCE_LOG_RX_BUFFERS 3 35 36#include "7990.h" /* use generic LANCE code */ 37 38/* Our private data structure */ 39struct m147lance_private { 40 struct lance_private lance; 41 unsigned long ram; 42}; 43 44/* function prototypes... This is easy because all the grot is in the 45 * generic LANCE support. All we have to support is probing for boards, 46 * plus board-specific init, open and close actions. 47 * Oh, and we need to tell the generic code how to read and write LANCE registers... 48 */ 49static int m147lance_open(struct net_device *dev); 50static int m147lance_close(struct net_device *dev); 51static void m147lance_writerap(struct lance_private *lp, unsigned short value); 52static void m147lance_writerdp(struct lance_private *lp, unsigned short value); 53static unsigned short m147lance_readrdp(struct lance_private *lp); 54 55typedef void (*writerap_t)(void *, unsigned short); 56typedef void (*writerdp_t)(void *, unsigned short); 57typedef unsigned short (*readrdp_t)(void *); 58 59static const struct net_device_ops lance_netdev_ops = { 60 .ndo_open = m147lance_open, 61 .ndo_stop = m147lance_close, 62 .ndo_start_xmit = lance_start_xmit, 63 .ndo_set_rx_mode = lance_set_multicast, 64 .ndo_tx_timeout = lance_tx_timeout, 65 .ndo_change_mtu = eth_change_mtu, 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 */ 71struct net_device * __init mvme147lance_probe(int unit) 72{ 73 struct net_device *dev; 74 static int called; 75 static const char name[] = "MVME147 LANCE"; 76 struct m147lance_private *lp; 77 u_long *addr; 78 u_long address; 79 int err; 80 81 if (!MACH_IS_MVME147 || called) 82 return ERR_PTR(-ENODEV); 83 called++; 84 85 dev = alloc_etherdev(sizeof(struct m147lance_private)); 86 if (!dev) 87 return ERR_PTR(-ENOMEM); 88 89 if (unit >= 0) 90 sprintf(dev->name, "eth%d", unit); 91 92 /* Fill the dev fields */ 93 dev->base_addr = (unsigned long)MVME147_LANCE_BASE; 94 dev->netdev_ops = &lance_netdev_ops; 95 dev->dma = 0; 96 97 addr=(u_long *)ETHERNET_ADDRESS; 98 address = *addr; 99 dev->dev_addr[0]=0x08; 100 dev->dev_addr[1]=0x00; 101 dev->dev_addr[2]=0x3e; 102 address=address>>8; 103 dev->dev_addr[5]=address&0xff; 104 address=address>>8; 105 dev->dev_addr[4]=address&0xff; 106 address=address>>8; 107 dev->dev_addr[3]=address&0xff; 108 109 printk("%s: MVME147 at 0x%08lx, irq %d, " 110 "Hardware Address %pM\n", 111 dev->name, dev->base_addr, MVME147_LANCE_IRQ, 112 dev->dev_addr); 113 114 lp = netdev_priv(dev); 115 lp->ram = __get_dma_pages(GFP_ATOMIC, 3); /* 16K */ 116 if (!lp->ram) 117 { 118 printk("%s: No memory for LANCE buffers\n", dev->name); 119 free_netdev(dev); 120 return ERR_PTR(-ENOMEM); 121 } 122 123 lp->lance.name = (char*)name; /* discards const, shut up gcc */ 124 lp->lance.base = dev->base_addr; 125 lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */ 126 lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram); /* LANCE addr of same RAM */ 127 lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ 128 lp->lance.irq = MVME147_LANCE_IRQ; 129 lp->lance.writerap = (writerap_t)m147lance_writerap; 130 lp->lance.writerdp = (writerdp_t)m147lance_writerdp; 131 lp->lance.readrdp = (readrdp_t)m147lance_readrdp; 132 lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS; 133 lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS; 134 lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK; 135 lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK; 136 137 err = register_netdev(dev); 138 if (err) { 139 free_pages(lp->ram, 3); 140 free_netdev(dev); 141 return ERR_PTR(err); 142 } 143 144 return dev; 145} 146 147static void m147lance_writerap(struct lance_private *lp, unsigned short value) 148{ 149 out_be16(lp->base + LANCE_RAP, value); 150} 151 152static void m147lance_writerdp(struct lance_private *lp, unsigned short value) 153{ 154 out_be16(lp->base + LANCE_RDP, value); 155} 156 157static unsigned short m147lance_readrdp(struct lance_private *lp) 158{ 159 return in_be16(lp->base + LANCE_RDP); 160} 161 162static int m147lance_open(struct net_device *dev) 163{ 164 int status; 165 166 status = lance_open(dev); /* call generic lance open code */ 167 if (status) 168 return status; 169 /* enable interrupts at board level. */ 170 m147_pcc->lan_cntrl=0; /* clear the interrupts (if any) */ 171 m147_pcc->lan_cntrl=0x08 | 0x04; /* Enable irq 4 */ 172 173 return 0; 174} 175 176static int m147lance_close(struct net_device *dev) 177{ 178 /* disable interrupts at boardlevel */ 179 m147_pcc->lan_cntrl=0x0; /* disable interrupts */ 180 lance_close(dev); 181 return 0; 182} 183 184#ifdef MODULE 185MODULE_LICENSE("GPL"); 186 187static struct net_device *dev_mvme147_lance; 188int __init init_module(void) 189{ 190 dev_mvme147_lance = mvme147lance_probe(-1); 191 if (IS_ERR(dev_mvme147_lance)) 192 return PTR_ERR(dev_mvme147_lance); 193 return 0; 194} 195 196void __exit cleanup_module(void) 197{ 198 struct m147lance_private *lp = netdev_priv(dev_mvme147_lance); 199 unregister_netdev(dev_mvme147_lance); 200 free_pages(lp->ram, 3); 201 free_netdev(dev_mvme147_lance); 202} 203 204#endif /* MODULE */ 205