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 32K 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, it takes (8 + 2) * 1544 bytes. 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 */ 39 struct 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 */ 49 static int m147lance_open(struct net_device *dev); 50 static int m147lance_close(struct net_device *dev); 51 static void m147lance_writerap(struct lance_private *lp, unsigned short value); 52 static void m147lance_writerdp(struct lance_private *lp, unsigned short value); 53 static unsigned short m147lance_readrdp(struct lance_private *lp); 54 55 typedef void (*writerap_t)(void *, unsigned short); 56 typedef void (*writerdp_t)(void *, unsigned short); 57 typedef unsigned short (*readrdp_t)(void *); 58 59 static 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_validate_addr = eth_validate_addr, 66 .ndo_set_mac_address = eth_mac_addr, 67 }; 68 69 /* Initialise the one and only on-board 7990 */ 70 struct net_device * __init mvme147lance_probe(int unit) 71 { 72 struct net_device *dev; 73 static int called; 74 static const char name[] = "MVME147 LANCE"; 75 struct m147lance_private *lp; 76 u_long *addr; 77 u_long address; 78 int err; 79 80 if (!MACH_IS_MVME147 || called) 81 return ERR_PTR(-ENODEV); 82 called++; 83 84 dev = alloc_etherdev(sizeof(struct m147lance_private)); 85 if (!dev) 86 return ERR_PTR(-ENOMEM); 87 88 if (unit >= 0) 89 sprintf(dev->name, "eth%d", unit); 90 91 /* Fill the dev fields */ 92 dev->base_addr = (unsigned long)MVME147_LANCE_BASE; 93 dev->netdev_ops = &lance_netdev_ops; 94 dev->dma = 0; 95 96 addr = (u_long *)ETHERNET_ADDRESS; 97 address = *addr; 98 dev->dev_addr[0] = 0x08; 99 dev->dev_addr[1] = 0x00; 100 dev->dev_addr[2] = 0x3e; 101 address = address >> 8; 102 dev->dev_addr[5] = address&0xff; 103 address = address >> 8; 104 dev->dev_addr[4] = address&0xff; 105 address = address >> 8; 106 dev->dev_addr[3] = address&0xff; 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 } 143 144 static void m147lance_writerap(struct lance_private *lp, unsigned short value) 145 { 146 out_be16(lp->base + LANCE_RAP, value); 147 } 148 149 static void m147lance_writerdp(struct lance_private *lp, unsigned short value) 150 { 151 out_be16(lp->base + LANCE_RDP, value); 152 } 153 154 static unsigned short m147lance_readrdp(struct lance_private *lp) 155 { 156 return in_be16(lp->base + LANCE_RDP); 157 } 158 159 static 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 } 172 173 static 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 } 180 181 #ifdef MODULE 182 MODULE_LICENSE("GPL"); 183 184 static struct net_device *dev_mvme147_lance; 185 int __init init_module(void) 186 { 187 dev_mvme147_lance = mvme147lance_probe(-1); 188 return PTR_ERR_OR_ZERO(dev_mvme147_lance); 189 } 190 191 void __exit cleanup_module(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 } 198 199 #endif /* MODULE */ 200