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/system.h> 26 #include <asm/io.h> 27 #include <asm/pgtable.h> 28 #include <asm/mvme147hw.h> 29 30 /* We have 16834 bytes 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. 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 */ 40 struct 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 */ 50 static int m147lance_open(struct net_device *dev); 51 static int m147lance_close(struct net_device *dev); 52 static void m147lance_writerap(struct lance_private *lp, unsigned short value); 53 static void m147lance_writerdp(struct lance_private *lp, unsigned short value); 54 static unsigned short m147lance_readrdp(struct lance_private *lp); 55 56 typedef void (*writerap_t)(void *, unsigned short); 57 typedef void (*writerdp_t)(void *, unsigned short); 58 typedef unsigned short (*readrdp_t)(void *); 59 60 static 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_change_mtu = eth_change_mtu, 67 .ndo_validate_addr = eth_validate_addr, 68 .ndo_set_mac_address = eth_mac_addr, 69 }; 70 71 /* Initialise the one and only on-board 7990 */ 72 struct net_device * __init mvme147lance_probe(int unit) 73 { 74 struct net_device *dev; 75 static int called; 76 static const char name[] = "MVME147 LANCE"; 77 struct m147lance_private *lp; 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 if (unit >= 0) 91 sprintf(dev->name, "eth%d", unit); 92 93 /* Fill the dev fields */ 94 dev->base_addr = (unsigned long)MVME147_LANCE_BASE; 95 dev->netdev_ops = &lance_netdev_ops; 96 dev->dma = 0; 97 98 addr=(u_long *)ETHERNET_ADDRESS; 99 address = *addr; 100 dev->dev_addr[0]=0x08; 101 dev->dev_addr[1]=0x00; 102 dev->dev_addr[2]=0x3e; 103 address=address>>8; 104 dev->dev_addr[5]=address&0xff; 105 address=address>>8; 106 dev->dev_addr[4]=address&0xff; 107 address=address>>8; 108 dev->dev_addr[3]=address&0xff; 109 110 printk("%s: MVME147 at 0x%08lx, irq %d, " 111 "Hardware Address %pM\n", 112 dev->name, dev->base_addr, MVME147_LANCE_IRQ, 113 dev->dev_addr); 114 115 lp = netdev_priv(dev); 116 lp->ram = __get_dma_pages(GFP_ATOMIC, 3); /* 16K */ 117 if (!lp->ram) 118 { 119 printk("%s: No memory for LANCE buffers\n", dev->name); 120 free_netdev(dev); 121 return ERR_PTR(-ENOMEM); 122 } 123 124 lp->lance.name = (char*)name; /* discards const, shut up gcc */ 125 lp->lance.base = dev->base_addr; 126 lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */ 127 lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram); /* LANCE addr of same RAM */ 128 lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ 129 lp->lance.irq = MVME147_LANCE_IRQ; 130 lp->lance.writerap = (writerap_t)m147lance_writerap; 131 lp->lance.writerdp = (writerdp_t)m147lance_writerdp; 132 lp->lance.readrdp = (readrdp_t)m147lance_readrdp; 133 lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS; 134 lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS; 135 lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK; 136 lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK; 137 138 err = register_netdev(dev); 139 if (err) { 140 free_pages(lp->ram, 3); 141 free_netdev(dev); 142 return ERR_PTR(err); 143 } 144 145 return dev; 146 } 147 148 static void m147lance_writerap(struct lance_private *lp, unsigned short value) 149 { 150 out_be16(lp->base + LANCE_RAP, value); 151 } 152 153 static void m147lance_writerdp(struct lance_private *lp, unsigned short value) 154 { 155 out_be16(lp->base + LANCE_RDP, value); 156 } 157 158 static unsigned short m147lance_readrdp(struct lance_private *lp) 159 { 160 return in_be16(lp->base + LANCE_RDP); 161 } 162 163 static int m147lance_open(struct net_device *dev) 164 { 165 int status; 166 167 status = lance_open(dev); /* call generic lance open code */ 168 if (status) 169 return status; 170 /* enable interrupts at board level. */ 171 m147_pcc->lan_cntrl=0; /* clear the interrupts (if any) */ 172 m147_pcc->lan_cntrl=0x08 | 0x04; /* Enable irq 4 */ 173 174 return 0; 175 } 176 177 static int m147lance_close(struct net_device *dev) 178 { 179 /* disable interrupts at boardlevel */ 180 m147_pcc->lan_cntrl=0x0; /* disable interrupts */ 181 lance_close(dev); 182 return 0; 183 } 184 185 #ifdef MODULE 186 MODULE_LICENSE("GPL"); 187 188 static struct net_device *dev_mvme147_lance; 189 int __init init_module(void) 190 { 191 dev_mvme147_lance = mvme147lance_probe(-1); 192 if (IS_ERR(dev_mvme147_lance)) 193 return PTR_ERR(dev_mvme147_lance); 194 return 0; 195 } 196 197 void __exit cleanup_module(void) 198 { 199 struct m147lance_private *lp = netdev_priv(dev_mvme147_lance); 200 unregister_netdev(dev_mvme147_lance); 201 free_pages(lp->ram, 3); 202 free_netdev(dev_mvme147_lance); 203 } 204 205 #endif /* MODULE */ 206