Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 | /* hplance.c : the Linux/hp300/lance ethernet driver * * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk> * Based on the Sun Lance driver and the NetBSD HP Lance driver * Uses the generic 7990.c LANCE code. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/sched.h> #include <linux/types.h> #include <linux/interrupt.h> #include <linux/ptrace.h> #include <linux/ioport.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/errno.h> #include <asm/system.h> #include <asm/io.h> #include <asm/pgtable.h> /* Used for the temporal inet entries and routing */ #include <linux/socket.h> #include <linux/route.h> #include <linux/dio.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/skbuff.h> #include "hplance.h" /* We have 16834 bytes of RAM for the init block and buffers. This places * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx * buffers and 2 Tx buffers. */ #define LANCE_LOG_TX_BUFFERS 1 #define LANCE_LOG_RX_BUFFERS 3 #include "7990.h" /* use generic LANCE code */ /* Our private data structure */ struct hplance_private { struct lance_private lance; unsigned int scode; void *base; }; /* function prototypes... This is easy because all the grot is in the * generic LANCE support. All we have to support is probing for boards, * plus board-specific init, open and close actions. * Oh, and we need to tell the generic code how to read and write LANCE registers... */ int hplance_probe(struct net_device *dev); static int hplance_init(struct net_device *dev, int scode); static int hplance_open(struct net_device *dev); static int hplance_close(struct net_device *dev); static void hplance_writerap(struct hplance_private *lp, unsigned short value); static void hplance_writerdp(struct hplance_private *lp, unsigned short value); static unsigned short hplance_readrdp(struct hplance_private *lp); #ifdef MODULE static struct hplance_private *root_hplance_dev; #endif /* Find all the HP Lance boards and initialise them... */ int __init hplance_probe(struct net_device *dev) { int cards = 0, called = 0; if (!MACH_IS_HP300 || called) return(ENODEV); called++; /* Isn't DIO nice? */ for(;;) { int v, scode = dio_find(DIO_ID_LAN); if (!scode) break; if(cards) dev = NULL; /* don't trash previous device, make a new one */ cards++; v = hplance_init(dev, scode); if (v) /* error, abort immediately */ return v; } /* OK, return success, or ENODEV if we didn't find any cards */ if (!cards) return -ENODEV; return 0; } /* Initialise a single lance board at the given select code */ static int __init hplance_init(struct net_device *dev, int scode) { /* const char *name = dio_scodetoname(scode); */ static const char name[] = "HP LANCE"; void *va = dio_scodetoviraddr(scode); struct hplance_private *lp; int i; #ifdef MODULE dev = init_etherdev(0, sizeof(struct hplance_private)); if (!dev) return -ENOMEM; #else dev->priv = kmalloc(sizeof(struct hplance_private), GFP_KERNEL); if (dev->priv == NULL) return -ENOMEM; memset(dev->priv, 0, sizeof(struct hplance_private)); #endif SET_MODULE_OWNER(dev); printk("%s: HP LANCE; select code %d, addr", dev->name, scode); /* reset the board */ writeb(0xff,va+DIO_IDOFF); udelay(100); /* ariba! ariba! udelay! udelay! */ /* Fill the dev fields */ dev->base_addr = (unsigned long)va; dev->open = &hplance_open; dev->stop = &hplance_close; dev->hard_start_xmit = &lance_start_xmit; dev->get_stats = &lance_get_stats; dev->set_multicast_list = &lance_set_multicast; dev->dma = 0; for (i=0; i<6; i++) { /* The NVRAM holds our ethernet address, one nibble per byte, * at bytes NVRAMOFF+1,3,5,7,9... */ dev->dev_addr[i] = ((readb(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4) | (readb(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF); printk("%c%2.2x", i == 0 ? ' ' : ':', dev->dev_addr[i]); } lp = (struct hplance_private *)dev->priv; lp->lance.name = (char*)name; /* discards const, shut up gcc */ lp->lance.ll = (struct lance_regs *)(va + HPLANCE_REGOFF); lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */ lp->lance.lance_init_block = 0; /* LANCE addr of same RAM */ lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ lp->lance.irq = dio_scodetoipl(scode); lp->lance.writerap = hplance_writerap; lp->lance.writerdp = hplance_writerdp; lp->lance.readrdp = hplance_readrdp; lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS; lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS; lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK; lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK; lp->scode = scode; lp->base = va; ether_setup(dev); printk(", irq %d\n", lp->lance.irq); #ifdef MODULE dev->ifindex = dev_new_index(); lp->next_module = root_hplance_dev; root_hplance_dev = lp; #endif /* MODULE */ dio_config_board(scode); /* tell bus scanning code this one's taken */ return 0; } /* This is disgusting. We have to check the DIO status register for ack every * time we read or write the LANCE registers. */ static void hplance_writerap(struct hplance_private *lp, unsigned short value) { struct hplance_reg *hpregs = (struct hplance_reg *)lp->base; do { lp->lance.ll->rap = value; } while ((hpregs->status & LE_ACK) == 0); } static void hplance_writerdp(struct hplance_private *lp, unsigned short value) { struct hplance_reg *hpregs = (struct hplance_reg *)lp->base; do { lp->lance.ll->rdp = value; } while ((hpregs->status & LE_ACK) == 0); } static unsigned short hplance_readrdp(struct hplance_private *lp) { unsigned short val; struct hplance_reg *hpregs = (struct hplance_reg *)lp->base; do { val = lp->lance.ll->rdp; } while ((hpregs->status & LE_ACK) == 0); return val; } static int hplance_open(struct net_device *dev) { int status; struct hplance_private *lp = (struct hplance_private *)dev->priv; struct hplance_reg *hpregs = (struct hplance_reg *)lp->base; status = lance_open(dev); /* call generic lance open code */ if (status) return status; /* enable interrupts at board level. */ writeb(LE_IE, &(hpregs->status)); return 0; } static int hplance_close(struct net_device *dev) { struct hplance_private *lp = (struct hplance_private *)dev->priv; struct hplance_reg *hpregs = (struct hplance_reg *)lp->base; writeb(0,&(hpregs->status)); /* disable interrupts at boardlevel */ lance_close(dev); return 0; } #ifdef MODULE MODULE_LICENSE("GPL"); int init_module(void) { root_lance_dev = NULL; return hplance_probe(NULL); } void cleanup_module(void) { /* Walk the chain of devices, unregistering them */ struct hplance_private *lp; while (root_hplance_dev) { lp = root_hplance_dev->next_module; dio_unconfig_board(lp->scode); unregister_netdev(root_lance_dev->dev); kfree(root_lance_dev->dev); root_lance_dev = lp; } } #endif /* MODULE */ |