1 /* hplance.c : the Linux/hp300/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 /* Used for the temporal inet entries and routing */ 18 #include <linux/socket.h> 19 #include <linux/route.h> 20 #include <linux/dio.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 28 #include "hplance.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 hplance_private { 41 struct lance_private lance; 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 __devinit hplance_init_one(struct dio_dev *d, 50 const struct dio_device_id *ent); 51 static void __devinit hplance_init(struct net_device *dev, 52 struct dio_dev *d); 53 static void __devexit hplance_remove_one(struct dio_dev *d); 54 static void hplance_writerap(void *priv, unsigned short value); 55 static void hplance_writerdp(void *priv, unsigned short value); 56 static unsigned short hplance_readrdp(void *priv); 57 static int hplance_open(struct net_device *dev); 58 static int hplance_close(struct net_device *dev); 59 60 static struct dio_device_id hplance_dio_tbl[] = { 61 { DIO_ID_LAN }, 62 { 0 } 63 }; 64 65 static struct dio_driver hplance_driver = { 66 .name = "hplance", 67 .id_table = hplance_dio_tbl, 68 .probe = hplance_init_one, 69 .remove = __devexit_p(hplance_remove_one), 70 }; 71 72 static const struct net_device_ops hplance_netdev_ops = { 73 .ndo_open = hplance_open, 74 .ndo_stop = hplance_close, 75 .ndo_start_xmit = lance_start_xmit, 76 .ndo_set_rx_mode = lance_set_multicast, 77 .ndo_change_mtu = eth_change_mtu, 78 .ndo_validate_addr = eth_validate_addr, 79 .ndo_set_mac_address = eth_mac_addr, 80 #ifdef CONFIG_NET_POLL_CONTROLLER 81 .ndo_poll_controller = lance_poll, 82 #endif 83 }; 84 85 /* Find all the HP Lance boards and initialise them... */ 86 static int __devinit hplance_init_one(struct dio_dev *d, 87 const struct dio_device_id *ent) 88 { 89 struct net_device *dev; 90 int err = -ENOMEM; 91 92 dev = alloc_etherdev(sizeof(struct hplance_private)); 93 if (!dev) 94 goto out; 95 96 err = -EBUSY; 97 if (!request_mem_region(dio_resource_start(d), 98 dio_resource_len(d), d->name)) 99 goto out_free_netdev; 100 101 hplance_init(dev, d); 102 err = register_netdev(dev); 103 if (err) 104 goto out_release_mem_region; 105 106 dio_set_drvdata(d, dev); 107 108 printk(KERN_INFO "%s: %s; select code %d, addr %pM, irq %d\n", 109 dev->name, d->name, d->scode, dev->dev_addr, d->ipl); 110 111 return 0; 112 113 out_release_mem_region: 114 release_mem_region(dio_resource_start(d), dio_resource_len(d)); 115 out_free_netdev: 116 free_netdev(dev); 117 out: 118 return err; 119 } 120 121 static void __devexit hplance_remove_one(struct dio_dev *d) 122 { 123 struct net_device *dev = dio_get_drvdata(d); 124 125 unregister_netdev(dev); 126 release_mem_region(dio_resource_start(d), dio_resource_len(d)); 127 free_netdev(dev); 128 } 129 130 /* Initialise a single lance board at the given DIO device */ 131 static void __devinit hplance_init(struct net_device *dev, struct dio_dev *d) 132 { 133 unsigned long va = (d->resource.start + DIO_VIRADDRBASE); 134 struct hplance_private *lp; 135 int i; 136 137 /* reset the board */ 138 out_8(va+DIO_IDOFF, 0xff); 139 udelay(100); /* ariba! ariba! udelay! udelay! */ 140 141 /* Fill the dev fields */ 142 dev->base_addr = va; 143 dev->netdev_ops = &hplance_netdev_ops; 144 dev->dma = 0; 145 146 for (i=0; i<6; i++) { 147 /* The NVRAM holds our ethernet address, one nibble per byte, 148 * at bytes NVRAMOFF+1,3,5,7,9... 149 */ 150 dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4) 151 | (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF); 152 } 153 154 lp = netdev_priv(dev); 155 lp->lance.name = (char*)d->name; /* discards const, shut up gcc */ 156 lp->lance.base = va; 157 lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */ 158 lp->lance.lance_init_block = NULL; /* LANCE addr of same RAM */ 159 lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ 160 lp->lance.irq = d->ipl; 161 lp->lance.writerap = hplance_writerap; 162 lp->lance.writerdp = hplance_writerdp; 163 lp->lance.readrdp = hplance_readrdp; 164 lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS; 165 lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS; 166 lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK; 167 lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK; 168 } 169 170 /* This is disgusting. We have to check the DIO status register for ack every 171 * time we read or write the LANCE registers. 172 */ 173 static void hplance_writerap(void *priv, unsigned short value) 174 { 175 struct lance_private *lp = (struct lance_private *)priv; 176 do { 177 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value); 178 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); 179 } 180 181 static void hplance_writerdp(void *priv, unsigned short value) 182 { 183 struct lance_private *lp = (struct lance_private *)priv; 184 do { 185 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value); 186 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); 187 } 188 189 static unsigned short hplance_readrdp(void *priv) 190 { 191 struct lance_private *lp = (struct lance_private *)priv; 192 __u16 value; 193 do { 194 value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP); 195 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); 196 return value; 197 } 198 199 static int hplance_open(struct net_device *dev) 200 { 201 int status; 202 struct lance_private *lp = netdev_priv(dev); 203 204 status = lance_open(dev); /* call generic lance open code */ 205 if (status) 206 return status; 207 /* enable interrupts at board level. */ 208 out_8(lp->base + HPLANCE_STATUS, LE_IE); 209 210 return 0; 211 } 212 213 static int hplance_close(struct net_device *dev) 214 { 215 struct lance_private *lp = netdev_priv(dev); 216 217 out_8(lp->base + HPLANCE_STATUS, 0); /* disable interrupts at boardlevel */ 218 lance_close(dev); 219 return 0; 220 } 221 222 static int __init hplance_init_module(void) 223 { 224 return dio_register_driver(&hplance_driver); 225 } 226 227 static void __exit hplance_cleanup_module(void) 228 { 229 dio_unregister_driver(&hplance_driver); 230 } 231 232 module_init(hplance_init_module); 233 module_exit(hplance_cleanup_module); 234 235 MODULE_LICENSE("GPL"); 236