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 16392 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, it takes (8 + 2) * 1544 bytes. 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 hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent); 50 static void hplance_init(struct net_device *dev, struct dio_dev *d); 51 static void hplance_remove_one(struct dio_dev *d); 52 static void hplance_writerap(void *priv, unsigned short value); 53 static void hplance_writerdp(void *priv, unsigned short value); 54 static unsigned short hplance_readrdp(void *priv); 55 static int hplance_open(struct net_device *dev); 56 static int hplance_close(struct net_device *dev); 57 58 static struct dio_device_id hplance_dio_tbl[] = { 59 { DIO_ID_LAN }, 60 { 0 } 61 }; 62 63 static struct dio_driver hplance_driver = { 64 .name = "hplance", 65 .id_table = hplance_dio_tbl, 66 .probe = hplance_init_one, 67 .remove = hplance_remove_one, 68 }; 69 70 static const struct net_device_ops hplance_netdev_ops = { 71 .ndo_open = hplance_open, 72 .ndo_stop = hplance_close, 73 .ndo_start_xmit = lance_start_xmit, 74 .ndo_set_rx_mode = lance_set_multicast, 75 .ndo_validate_addr = eth_validate_addr, 76 .ndo_set_mac_address = eth_mac_addr, 77 #ifdef CONFIG_NET_POLL_CONTROLLER 78 .ndo_poll_controller = lance_poll, 79 #endif 80 }; 81 82 /* Find all the HP Lance boards and initialise them... */ 83 static int hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent) 84 { 85 struct net_device *dev; 86 int err = -ENOMEM; 87 88 dev = alloc_etherdev(sizeof(struct hplance_private)); 89 if (!dev) 90 goto out; 91 92 err = -EBUSY; 93 if (!request_mem_region(dio_resource_start(d), 94 dio_resource_len(d), d->name)) 95 goto out_free_netdev; 96 97 hplance_init(dev, d); 98 err = register_netdev(dev); 99 if (err) 100 goto out_release_mem_region; 101 102 dio_set_drvdata(d, dev); 103 104 printk(KERN_INFO "%s: %s; select code %d, addr %pM, irq %d\n", 105 dev->name, d->name, d->scode, dev->dev_addr, d->ipl); 106 107 return 0; 108 109 out_release_mem_region: 110 release_mem_region(dio_resource_start(d), dio_resource_len(d)); 111 out_free_netdev: 112 free_netdev(dev); 113 out: 114 return err; 115 } 116 117 static void hplance_remove_one(struct dio_dev *d) 118 { 119 struct net_device *dev = dio_get_drvdata(d); 120 121 unregister_netdev(dev); 122 release_mem_region(dio_resource_start(d), dio_resource_len(d)); 123 free_netdev(dev); 124 } 125 126 /* Initialise a single lance board at the given DIO device */ 127 static void hplance_init(struct net_device *dev, struct dio_dev *d) 128 { 129 unsigned long va = (d->resource.start + DIO_VIRADDRBASE); 130 struct hplance_private *lp; 131 int i; 132 133 /* reset the board */ 134 out_8(va + DIO_IDOFF, 0xff); 135 udelay(100); /* ariba! ariba! udelay! udelay! */ 136 137 /* Fill the dev fields */ 138 dev->base_addr = va; 139 dev->netdev_ops = &hplance_netdev_ops; 140 dev->dma = 0; 141 142 for (i = 0; i < 6; i++) { 143 /* The NVRAM holds our ethernet address, one nibble per byte, 144 * at bytes NVRAMOFF+1,3,5,7,9... 145 */ 146 dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4) 147 | (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF); 148 } 149 150 lp = netdev_priv(dev); 151 lp->lance.name = d->name; 152 lp->lance.base = va; 153 lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */ 154 lp->lance.lance_init_block = NULL; /* LANCE addr of same RAM */ 155 lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ 156 lp->lance.irq = d->ipl; 157 lp->lance.writerap = hplance_writerap; 158 lp->lance.writerdp = hplance_writerdp; 159 lp->lance.readrdp = hplance_readrdp; 160 lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS; 161 lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS; 162 lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK; 163 lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK; 164 } 165 166 /* This is disgusting. We have to check the DIO status register for ack every 167 * time we read or write the LANCE registers. 168 */ 169 static void hplance_writerap(void *priv, unsigned short value) 170 { 171 struct lance_private *lp = (struct lance_private *)priv; 172 do { 173 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value); 174 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); 175 } 176 177 static void hplance_writerdp(void *priv, unsigned short value) 178 { 179 struct lance_private *lp = (struct lance_private *)priv; 180 do { 181 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value); 182 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); 183 } 184 185 static unsigned short hplance_readrdp(void *priv) 186 { 187 struct lance_private *lp = (struct lance_private *)priv; 188 __u16 value; 189 do { 190 value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP); 191 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); 192 return value; 193 } 194 195 static int hplance_open(struct net_device *dev) 196 { 197 int status; 198 struct lance_private *lp = netdev_priv(dev); 199 200 status = lance_open(dev); /* call generic lance open code */ 201 if (status) 202 return status; 203 /* enable interrupts at board level. */ 204 out_8(lp->base + HPLANCE_STATUS, LE_IE); 205 206 return 0; 207 } 208 209 static int hplance_close(struct net_device *dev) 210 { 211 struct lance_private *lp = netdev_priv(dev); 212 213 out_8(lp->base + HPLANCE_STATUS, 0); /* disable interrupts at boardlevel */ 214 lance_close(dev); 215 return 0; 216 } 217 218 static int __init hplance_init_module(void) 219 { 220 return dio_register_driver(&hplance_driver); 221 } 222 223 static void __exit hplance_cleanup_module(void) 224 { 225 dio_unregister_driver(&hplance_driver); 226 } 227 228 module_init(hplance_init_module); 229 module_exit(hplance_cleanup_module); 230 231 MODULE_LICENSE("GPL"); 232