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/system.h> 26 #include <asm/io.h> 27 #include <asm/pgtable.h> 28 29 #include "hplance.h" 30 31 /* We have 16834 bytes of RAM for the init block and buffers. This places 32 * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx 33 * buffers and 2 Tx buffers. 34 */ 35 #define LANCE_LOG_TX_BUFFERS 1 36 #define LANCE_LOG_RX_BUFFERS 3 37 38 #include "7990.h" /* use generic LANCE code */ 39 40 /* Our private data structure */ 41 struct hplance_private { 42 struct lance_private lance; 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 __devinit hplance_init_one(struct dio_dev *d, 51 const struct dio_device_id *ent); 52 static void __devinit hplance_init(struct net_device *dev, 53 struct dio_dev *d); 54 static void __devexit hplance_remove_one(struct dio_dev *d); 55 static void hplance_writerap(void *priv, unsigned short value); 56 static void hplance_writerdp(void *priv, unsigned short value); 57 static unsigned short hplance_readrdp(void *priv); 58 static int hplance_open(struct net_device *dev); 59 static int hplance_close(struct net_device *dev); 60 61 static struct dio_device_id hplance_dio_tbl[] = { 62 { DIO_ID_LAN }, 63 { 0 } 64 }; 65 66 static struct dio_driver hplance_driver = { 67 .name = "hplance", 68 .id_table = hplance_dio_tbl, 69 .probe = hplance_init_one, 70 .remove = __devexit_p(hplance_remove_one), 71 }; 72 73 static const struct net_device_ops hplance_netdev_ops = { 74 .ndo_open = hplance_open, 75 .ndo_stop = hplance_close, 76 .ndo_start_xmit = lance_start_xmit, 77 .ndo_set_rx_mode = lance_set_multicast, 78 .ndo_change_mtu = eth_change_mtu, 79 .ndo_validate_addr = eth_validate_addr, 80 .ndo_set_mac_address = eth_mac_addr, 81 #ifdef CONFIG_NET_POLL_CONTROLLER 82 .ndo_poll_controller = lance_poll, 83 #endif 84 }; 85 86 /* Find all the HP Lance boards and initialise them... */ 87 static int __devinit hplance_init_one(struct dio_dev *d, 88 const struct dio_device_id *ent) 89 { 90 struct net_device *dev; 91 int err = -ENOMEM; 92 int i; 93 94 dev = alloc_etherdev(sizeof(struct hplance_private)); 95 if (!dev) 96 goto out; 97 98 err = -EBUSY; 99 if (!request_mem_region(dio_resource_start(d), 100 dio_resource_len(d), d->name)) 101 goto out_free_netdev; 102 103 hplance_init(dev, d); 104 err = register_netdev(dev); 105 if (err) 106 goto out_release_mem_region; 107 108 dio_set_drvdata(d, dev); 109 110 printk(KERN_INFO "%s: %s; select code %d, addr %2.2x", dev->name, d->name, d->scode, dev->dev_addr[0]); 111 112 for (i=1; i<6; i++) { 113 printk(":%2.2x", dev->dev_addr[i]); 114 } 115 116 printk(", irq %d\n", d->ipl); 117 118 return 0; 119 120 out_release_mem_region: 121 release_mem_region(dio_resource_start(d), dio_resource_len(d)); 122 out_free_netdev: 123 free_netdev(dev); 124 out: 125 return err; 126 } 127 128 static void __devexit hplance_remove_one(struct dio_dev *d) 129 { 130 struct net_device *dev = dio_get_drvdata(d); 131 132 unregister_netdev(dev); 133 release_mem_region(dio_resource_start(d), dio_resource_len(d)); 134 free_netdev(dev); 135 } 136 137 /* Initialise a single lance board at the given DIO device */ 138 static void __devinit hplance_init(struct net_device *dev, struct dio_dev *d) 139 { 140 unsigned long va = (d->resource.start + DIO_VIRADDRBASE); 141 struct hplance_private *lp; 142 int i; 143 144 /* reset the board */ 145 out_8(va+DIO_IDOFF, 0xff); 146 udelay(100); /* ariba! ariba! udelay! udelay! */ 147 148 /* Fill the dev fields */ 149 dev->base_addr = va; 150 dev->netdev_ops = &hplance_netdev_ops; 151 dev->dma = 0; 152 153 for (i=0; i<6; i++) { 154 /* The NVRAM holds our ethernet address, one nibble per byte, 155 * at bytes NVRAMOFF+1,3,5,7,9... 156 */ 157 dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4) 158 | (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF); 159 } 160 161 lp = netdev_priv(dev); 162 lp->lance.name = (char*)d->name; /* discards const, shut up gcc */ 163 lp->lance.base = va; 164 lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */ 165 lp->lance.lance_init_block = NULL; /* LANCE addr of same RAM */ 166 lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ 167 lp->lance.irq = d->ipl; 168 lp->lance.writerap = hplance_writerap; 169 lp->lance.writerdp = hplance_writerdp; 170 lp->lance.readrdp = hplance_readrdp; 171 lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS; 172 lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS; 173 lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK; 174 lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK; 175 } 176 177 /* This is disgusting. We have to check the DIO status register for ack every 178 * time we read or write the LANCE registers. 179 */ 180 static void hplance_writerap(void *priv, unsigned short value) 181 { 182 struct lance_private *lp = (struct lance_private *)priv; 183 do { 184 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value); 185 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); 186 } 187 188 static void hplance_writerdp(void *priv, unsigned short value) 189 { 190 struct lance_private *lp = (struct lance_private *)priv; 191 do { 192 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value); 193 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); 194 } 195 196 static unsigned short hplance_readrdp(void *priv) 197 { 198 struct lance_private *lp = (struct lance_private *)priv; 199 __u16 value; 200 do { 201 value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP); 202 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); 203 return value; 204 } 205 206 static int hplance_open(struct net_device *dev) 207 { 208 int status; 209 struct lance_private *lp = netdev_priv(dev); 210 211 status = lance_open(dev); /* call generic lance open code */ 212 if (status) 213 return status; 214 /* enable interrupts at board level. */ 215 out_8(lp->base + HPLANCE_STATUS, LE_IE); 216 217 return 0; 218 } 219 220 static int hplance_close(struct net_device *dev) 221 { 222 struct lance_private *lp = netdev_priv(dev); 223 224 out_8(lp->base + HPLANCE_STATUS, 0); /* disable interrupts at boardlevel */ 225 lance_close(dev); 226 return 0; 227 } 228 229 static int __init hplance_init_module(void) 230 { 231 return dio_register_driver(&hplance_driver); 232 } 233 234 static void __exit hplance_cleanup_module(void) 235 { 236 dio_unregister_driver(&hplance_driver); 237 } 238 239 module_init(hplance_init_module); 240 module_exit(hplance_cleanup_module); 241 242 MODULE_LICENSE("GPL"); 243