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/slab.h> 14#include <linux/string.h> 15#include <linux/delay.h> 16#include <linux/init.h> 17#include <linux/errno.h> 18/* Used for the temporal inet entries and routing */ 19#include <linux/socket.h> 20#include <linux/route.h> 21#include <linux/dio.h> 22#include <linux/netdevice.h> 23#include <linux/etherdevice.h> 24#include <linux/skbuff.h> 25 26#include <asm/system.h> 27#include <asm/io.h> 28#include <asm/pgtable.h> 29 30#include "hplance.h" 31 32/* We have 16834 bytes of RAM for the init block and buffers. This places 33 * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx 34 * buffers and 2 Tx buffers. 35 */ 36#define LANCE_LOG_TX_BUFFERS 1 37#define LANCE_LOG_RX_BUFFERS 3 38 39#include "7990.h" /* use generic LANCE code */ 40 41/* Our private data structure */ 42struct hplance_private { 43 struct lance_private lance; 44}; 45 46/* function prototypes... This is easy because all the grot is in the 47 * generic LANCE support. All we have to support is probing for boards, 48 * plus board-specific init, open and close actions. 49 * Oh, and we need to tell the generic code how to read and write LANCE registers... 50 */ 51static int __devinit hplance_init_one(struct dio_dev *d, 52 const struct dio_device_id *ent); 53static void __devinit hplance_init(struct net_device *dev, 54 struct dio_dev *d); 55static void __devexit hplance_remove_one(struct dio_dev *d); 56static void hplance_writerap(void *priv, unsigned short value); 57static void hplance_writerdp(void *priv, unsigned short value); 58static unsigned short hplance_readrdp(void *priv); 59static int hplance_open(struct net_device *dev); 60static int hplance_close(struct net_device *dev); 61 62static struct dio_device_id hplance_dio_tbl[] = { 63 { DIO_ID_LAN }, 64 { 0 } 65}; 66 67static struct dio_driver hplance_driver = { 68 .name = "hplance", 69 .id_table = hplance_dio_tbl, 70 .probe = hplance_init_one, 71 .remove = __devexit_p(hplance_remove_one), 72}; 73 74/* Find all the HP Lance boards and initialise them... */ 75static int __devinit hplance_init_one(struct dio_dev *d, 76 const struct dio_device_id *ent) 77{ 78 struct net_device *dev; 79 int err = -ENOMEM; 80 int i; 81 82 dev = alloc_etherdev(sizeof(struct hplance_private)); 83 if (!dev) 84 goto out; 85 86 err = -EBUSY; 87 if (!request_mem_region(dio_resource_start(d), 88 dio_resource_len(d), d->name)) 89 goto out_free_netdev; 90 91 hplance_init(dev, d); 92 err = register_netdev(dev); 93 if (err) 94 goto out_release_mem_region; 95 96 dio_set_drvdata(d, dev); 97 98 printk(KERN_INFO "%s: %s; select code %d, addr %2.2x", dev->name, d->name, d->scode, dev->dev_addr[0]); 99 100 for (i=1; i<6; i++) { 101 printk(":%2.2x", dev->dev_addr[i]); 102 } 103 104 printk(", irq %d\n", d->ipl); 105 106 return 0; 107 108 out_release_mem_region: 109 release_mem_region(dio_resource_start(d), dio_resource_len(d)); 110 out_free_netdev: 111 free_netdev(dev); 112 out: 113 return err; 114} 115 116static void __devexit hplance_remove_one(struct dio_dev *d) 117{ 118 struct net_device *dev = dio_get_drvdata(d); 119 120 unregister_netdev(dev); 121 release_mem_region(dio_resource_start(d), dio_resource_len(d)); 122 free_netdev(dev); 123} 124 125/* Initialise a single lance board at the given DIO device */ 126static void __init hplance_init(struct net_device *dev, struct dio_dev *d) 127{ 128 unsigned long va = (d->resource.start + DIO_VIRADDRBASE); 129 struct hplance_private *lp; 130 int i; 131 132 /* reset the board */ 133 out_8(va+DIO_IDOFF, 0xff); 134 udelay(100); /* ariba! ariba! udelay! udelay! */ 135 136 /* Fill the dev fields */ 137 dev->base_addr = va; 138 dev->open = &hplance_open; 139 dev->stop = &hplance_close; 140#ifdef CONFIG_NET_POLL_CONTROLLER 141 dev->poll_controller = lance_poll; 142#endif 143 dev->hard_start_xmit = &lance_start_xmit; 144 dev->get_stats = &lance_get_stats; 145 dev->set_multicast_list = &lance_set_multicast; 146 dev->dma = 0; 147 148 for (i=0; i<6; i++) { 149 /* The NVRAM holds our ethernet address, one nibble per byte, 150 * at bytes NVRAMOFF+1,3,5,7,9... 151 */ 152 dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4) 153 | (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF); 154 } 155 156 lp = netdev_priv(dev); 157 lp->lance.name = (char*)d->name; /* discards const, shut up gcc */ 158 lp->lance.base = va; 159 lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */ 160 lp->lance.lance_init_block = NULL; /* LANCE addr of same RAM */ 161 lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ 162 lp->lance.irq = d->ipl; 163 lp->lance.writerap = hplance_writerap; 164 lp->lance.writerdp = hplance_writerdp; 165 lp->lance.readrdp = hplance_readrdp; 166 lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS; 167 lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS; 168 lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK; 169 lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK; 170} 171 172/* This is disgusting. We have to check the DIO status register for ack every 173 * time we read or write the LANCE registers. 174 */ 175static void hplance_writerap(void *priv, unsigned short value) 176{ 177 struct lance_private *lp = (struct lance_private *)priv; 178 do { 179 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value); 180 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); 181} 182 183static void hplance_writerdp(void *priv, unsigned short value) 184{ 185 struct lance_private *lp = (struct lance_private *)priv; 186 do { 187 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value); 188 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); 189} 190 191static unsigned short hplance_readrdp(void *priv) 192{ 193 struct lance_private *lp = (struct lance_private *)priv; 194 __u16 value; 195 do { 196 value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP); 197 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); 198 return value; 199} 200 201static int hplance_open(struct net_device *dev) 202{ 203 int status; 204 struct lance_private *lp = netdev_priv(dev); 205 206 status = lance_open(dev); /* call generic lance open code */ 207 if (status) 208 return status; 209 /* enable interrupts at board level. */ 210 out_8(lp->base + HPLANCE_STATUS, LE_IE); 211 212 return 0; 213} 214 215static int hplance_close(struct net_device *dev) 216{ 217 struct lance_private *lp = netdev_priv(dev); 218 219 out_8(lp->base + HPLANCE_STATUS, 0); /* disable interrupts at boardlevel */ 220 lance_close(dev); 221 return 0; 222} 223 224int __init hplance_init_module(void) 225{ 226 return dio_register_driver(&hplance_driver); 227} 228 229void __exit hplance_cleanup_module(void) 230{ 231 dio_unregister_driver(&hplance_driver); 232} 233 234module_init(hplance_init_module); 235module_exit(hplance_cleanup_module); 236 237MODULE_LICENSE("GPL"); 238