Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 1 | /* |
| 2 | * 7990.c -- LANCE ethernet IC generic routines. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * This is an attempt to separate out the bits of various ethernet |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 4 | * drivers that are common because they all use the AMD 7990 LANCE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * (Local Area Network Controller for Ethernet) chip. |
| 6 | * |
| 7 | * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk> |
| 8 | * |
| 9 | * Most of this stuff was obtained by looking at other LANCE drivers, |
| 10 | * in particular a2065.[ch]. The AMD C-LANCE datasheet was also helpful. |
| 11 | * NB: this was made easy by the fact that Jes Sorensen had cleaned up |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 12 | * most of a2025 and sunlance with the aim of merging them, so the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * common code was pretty obvious. |
| 14 | */ |
| 15 | #include <linux/crc32.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/errno.h> |
| 18 | #include <linux/netdevice.h> |
| 19 | #include <linux/etherdevice.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/types.h> |
| 24 | #include <linux/fcntl.h> |
| 25 | #include <linux/interrupt.h> |
| 26 | #include <linux/ioport.h> |
| 27 | #include <linux/in.h> |
| 28 | #include <linux/route.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/string.h> |
| 31 | #include <linux/skbuff.h> |
Al Viro | 3c13958 | 2005-12-01 06:44:55 -0500 | [diff] [blame] | 32 | #include <asm/irq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | /* Used for the temporal inet entries and routing */ |
| 34 | #include <linux/socket.h> |
| 35 | #include <linux/bitops.h> |
| 36 | |
| 37 | #include <asm/system.h> |
| 38 | #include <asm/io.h> |
| 39 | #include <asm/dma.h> |
| 40 | #include <asm/pgtable.h> |
| 41 | #ifdef CONFIG_HP300 |
| 42 | #include <asm/blinken.h> |
| 43 | #endif |
| 44 | |
| 45 | #include "7990.h" |
| 46 | |
| 47 | #define WRITERAP(lp,x) out_be16(lp->base + LANCE_RAP, (x)) |
| 48 | #define WRITERDP(lp,x) out_be16(lp->base + LANCE_RDP, (x)) |
| 49 | #define READRDP(lp) in_be16(lp->base + LANCE_RDP) |
| 50 | |
| 51 | #if defined(CONFIG_HPLANCE) || defined(CONFIG_HPLANCE_MODULE) |
| 52 | #include "hplance.h" |
| 53 | |
| 54 | #undef WRITERAP |
| 55 | #undef WRITERDP |
| 56 | #undef READRDP |
| 57 | |
| 58 | #if defined(CONFIG_MVME147_NET) || defined(CONFIG_MVME147_NET_MODULE) |
| 59 | |
| 60 | /* Lossage Factor Nine, Mr Sulu. */ |
| 61 | #define WRITERAP(lp,x) (lp->writerap(lp,x)) |
| 62 | #define WRITERDP(lp,x) (lp->writerdp(lp,x)) |
| 63 | #define READRDP(lp) (lp->readrdp(lp)) |
| 64 | |
| 65 | #else |
| 66 | |
| 67 | /* These inlines can be used if only CONFIG_HPLANCE is defined */ |
| 68 | static inline void WRITERAP(struct lance_private *lp, __u16 value) |
| 69 | { |
| 70 | do { |
| 71 | out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value); |
| 72 | } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); |
| 73 | } |
| 74 | |
| 75 | static inline void WRITERDP(struct lance_private *lp, __u16 value) |
| 76 | { |
| 77 | do { |
| 78 | out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value); |
| 79 | } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); |
| 80 | } |
| 81 | |
| 82 | static inline __u16 READRDP(struct lance_private *lp) |
| 83 | { |
| 84 | __u16 value; |
| 85 | do { |
| 86 | value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP); |
| 87 | } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); |
| 88 | return value; |
| 89 | } |
| 90 | |
| 91 | #endif |
| 92 | #endif /* CONFIG_HPLANCE || CONFIG_HPLANCE_MODULE */ |
| 93 | |
| 94 | /* debugging output macros, various flavours */ |
| 95 | /* #define TEST_HITS */ |
| 96 | #ifdef UNDEF |
| 97 | #define PRINT_RINGS() \ |
| 98 | do { \ |
| 99 | int t; \ |
| 100 | for (t=0; t < RX_RING_SIZE; t++) { \ |
| 101 | printk("R%d: @(%02X %04X) len %04X, mblen %04X, bits %02X\n",\ |
| 102 | t, ib->brx_ring[t].rmd1_hadr, ib->brx_ring[t].rmd0,\ |
| 103 | ib->brx_ring[t].length,\ |
| 104 | ib->brx_ring[t].mblength, ib->brx_ring[t].rmd1_bits);\ |
| 105 | }\ |
| 106 | for (t=0; t < TX_RING_SIZE; t++) { \ |
| 107 | printk("T%d: @(%02X %04X) len %04X, misc %04X, bits %02X\n",\ |
| 108 | t, ib->btx_ring[t].tmd1_hadr, ib->btx_ring[t].tmd0,\ |
| 109 | ib->btx_ring[t].length,\ |
| 110 | ib->btx_ring[t].misc, ib->btx_ring[t].tmd1_bits);\ |
| 111 | }\ |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 112 | } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | #else |
| 114 | #define PRINT_RINGS() |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 115 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | |
| 117 | /* Load the CSR registers. The LANCE has to be STOPped when we do this! */ |
| 118 | static void load_csrs (struct lance_private *lp) |
| 119 | { |
| 120 | volatile struct lance_init_block *aib = lp->lance_init_block; |
| 121 | int leptr; |
| 122 | |
| 123 | leptr = LANCE_ADDR (aib); |
| 124 | |
| 125 | WRITERAP(lp, LE_CSR1); /* load address of init block */ |
| 126 | WRITERDP(lp, leptr & 0xFFFF); |
| 127 | WRITERAP(lp, LE_CSR2); |
| 128 | WRITERDP(lp, leptr >> 16); |
| 129 | WRITERAP(lp, LE_CSR3); |
| 130 | WRITERDP(lp, lp->busmaster_regval); /* set byteswap/ALEctrl/byte ctrl */ |
| 131 | |
| 132 | /* Point back to csr0 */ |
| 133 | WRITERAP(lp, LE_CSR0); |
| 134 | } |
| 135 | |
| 136 | /* #define to 0 or 1 appropriately */ |
| 137 | #define DEBUG_IRING 0 |
| 138 | /* Set up the Lance Rx and Tx rings and the init block */ |
| 139 | static void lance_init_ring (struct net_device *dev) |
| 140 | { |
| 141 | struct lance_private *lp = netdev_priv(dev); |
| 142 | volatile struct lance_init_block *ib = lp->init_block; |
| 143 | volatile struct lance_init_block *aib; /* for LANCE_ADDR computations */ |
| 144 | int leptr; |
| 145 | int i; |
| 146 | |
| 147 | aib = lp->lance_init_block; |
| 148 | |
| 149 | lp->rx_new = lp->tx_new = 0; |
| 150 | lp->rx_old = lp->tx_old = 0; |
| 151 | |
| 152 | ib->mode = LE_MO_PROM; /* normal, enable Tx & Rx */ |
| 153 | |
| 154 | /* Copy the ethernet address to the lance init block |
| 155 | * Notice that we do a byteswap if we're big endian. |
| 156 | * [I think this is the right criterion; at least, sunlance, |
| 157 | * a2065 and atarilance do the byteswap and lance.c (PC) doesn't. |
| 158 | * However, the datasheet says that the BSWAP bit doesn't affect |
| 159 | * the init block, so surely it should be low byte first for |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 160 | * everybody? Um.] |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | * We could define the ib->physaddr as three 16bit values and |
| 162 | * use (addr[1] << 8) | addr[0] & co, but this is more efficient. |
| 163 | */ |
| 164 | #ifdef __BIG_ENDIAN |
| 165 | ib->phys_addr [0] = dev->dev_addr [1]; |
| 166 | ib->phys_addr [1] = dev->dev_addr [0]; |
| 167 | ib->phys_addr [2] = dev->dev_addr [3]; |
| 168 | ib->phys_addr [3] = dev->dev_addr [2]; |
| 169 | ib->phys_addr [4] = dev->dev_addr [5]; |
| 170 | ib->phys_addr [5] = dev->dev_addr [4]; |
| 171 | #else |
| 172 | for (i=0; i<6; i++) |
| 173 | ib->phys_addr[i] = dev->dev_addr[i]; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 174 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | |
| 176 | if (DEBUG_IRING) |
| 177 | printk ("TX rings:\n"); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | lp->tx_full = 0; |
| 180 | /* Setup the Tx ring entries */ |
| 181 | for (i = 0; i < (1<<lp->lance_log_tx_bufs); i++) { |
| 182 | leptr = LANCE_ADDR(&aib->tx_buf[i][0]); |
| 183 | ib->btx_ring [i].tmd0 = leptr; |
| 184 | ib->btx_ring [i].tmd1_hadr = leptr >> 16; |
| 185 | ib->btx_ring [i].tmd1_bits = 0; |
| 186 | ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */ |
| 187 | ib->btx_ring [i].misc = 0; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 188 | if (DEBUG_IRING) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | printk ("%d: 0x%8.8x\n", i, leptr); |
| 190 | } |
| 191 | |
| 192 | /* Setup the Rx ring entries */ |
| 193 | if (DEBUG_IRING) |
| 194 | printk ("RX rings:\n"); |
| 195 | for (i = 0; i < (1<<lp->lance_log_rx_bufs); i++) { |
| 196 | leptr = LANCE_ADDR(&aib->rx_buf[i][0]); |
| 197 | |
| 198 | ib->brx_ring [i].rmd0 = leptr; |
| 199 | ib->brx_ring [i].rmd1_hadr = leptr >> 16; |
| 200 | ib->brx_ring [i].rmd1_bits = LE_R1_OWN; |
| 201 | /* 0xf000 == bits that must be one (reserved, presumably) */ |
| 202 | ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000; |
| 203 | ib->brx_ring [i].mblength = 0; |
| 204 | if (DEBUG_IRING) |
| 205 | printk ("%d: 0x%8.8x\n", i, leptr); |
| 206 | } |
| 207 | |
| 208 | /* Setup the initialization block */ |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 209 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | /* Setup rx descriptor pointer */ |
| 211 | leptr = LANCE_ADDR(&aib->brx_ring); |
| 212 | ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16); |
| 213 | ib->rx_ptr = leptr; |
| 214 | if (DEBUG_IRING) |
| 215 | printk ("RX ptr: %8.8x\n", leptr); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 216 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | /* Setup tx descriptor pointer */ |
| 218 | leptr = LANCE_ADDR(&aib->btx_ring); |
| 219 | ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16); |
| 220 | ib->tx_ptr = leptr; |
| 221 | if (DEBUG_IRING) |
| 222 | printk ("TX ptr: %8.8x\n", leptr); |
| 223 | |
| 224 | /* Clear the multicast filter */ |
| 225 | ib->filter [0] = 0; |
| 226 | ib->filter [1] = 0; |
| 227 | PRINT_RINGS(); |
| 228 | } |
| 229 | |
| 230 | /* LANCE must be STOPped before we do this, too... */ |
| 231 | static int init_restart_lance (struct lance_private *lp) |
| 232 | { |
| 233 | int i; |
| 234 | |
| 235 | WRITERAP(lp, LE_CSR0); |
| 236 | WRITERDP(lp, LE_C0_INIT); |
| 237 | |
| 238 | /* Need a hook here for sunlance ledma stuff */ |
| 239 | |
| 240 | /* Wait for the lance to complete initialization */ |
| 241 | for (i = 0; (i < 100) && !(READRDP(lp) & (LE_C0_ERR | LE_C0_IDON)); i++) |
| 242 | barrier(); |
| 243 | if ((i == 100) || (READRDP(lp) & LE_C0_ERR)) { |
| 244 | printk ("LANCE unopened after %d ticks, csr0=%4.4x.\n", i, READRDP(lp)); |
| 245 | return -1; |
| 246 | } |
| 247 | |
| 248 | /* Clear IDON by writing a "1", enable interrupts and start lance */ |
| 249 | WRITERDP(lp, LE_C0_IDON); |
| 250 | WRITERDP(lp, LE_C0_INEA | LE_C0_STRT); |
| 251 | |
| 252 | return 0; |
| 253 | } |
| 254 | |
| 255 | static int lance_reset (struct net_device *dev) |
| 256 | { |
| 257 | struct lance_private *lp = netdev_priv(dev); |
| 258 | int status; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 259 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | /* Stop the lance */ |
| 261 | WRITERAP(lp, LE_CSR0); |
| 262 | WRITERDP(lp, LE_C0_STOP); |
| 263 | |
| 264 | load_csrs (lp); |
| 265 | lance_init_ring (dev); |
| 266 | dev->trans_start = jiffies; |
| 267 | status = init_restart_lance (lp); |
| 268 | #ifdef DEBUG_DRIVER |
| 269 | printk ("Lance restart=%d\n", status); |
| 270 | #endif |
| 271 | return status; |
| 272 | } |
| 273 | |
| 274 | static int lance_rx (struct net_device *dev) |
| 275 | { |
| 276 | struct lance_private *lp = netdev_priv(dev); |
| 277 | volatile struct lance_init_block *ib = lp->init_block; |
| 278 | volatile struct lance_rx_desc *rd; |
| 279 | unsigned char bits; |
| 280 | int len = 0; /* XXX shut up gcc warnings */ |
| 281 | struct sk_buff *skb = 0; /* XXX shut up gcc warnings */ |
| 282 | #ifdef TEST_HITS |
| 283 | int i; |
| 284 | #endif |
| 285 | |
| 286 | #ifdef TEST_HITS |
| 287 | printk ("["); |
| 288 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 289 | if (i == lp->rx_new) |
| 290 | printk ("%s", |
| 291 | ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "_" : "X"); |
| 292 | else |
| 293 | printk ("%s", |
| 294 | ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "." : "1"); |
| 295 | } |
| 296 | printk ("]"); |
| 297 | #endif |
| 298 | #ifdef CONFIG_HP300 |
| 299 | blinken_leds(0x40, 0); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 300 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | WRITERDP(lp, LE_C0_RINT | LE_C0_INEA); /* ack Rx int, reenable ints */ |
| 302 | for (rd = &ib->brx_ring [lp->rx_new]; /* For each Rx ring we own... */ |
| 303 | !((bits = rd->rmd1_bits) & LE_R1_OWN); |
| 304 | rd = &ib->brx_ring [lp->rx_new]) { |
| 305 | |
| 306 | /* We got an incomplete frame? */ |
| 307 | if ((bits & LE_R1_POK) != LE_R1_POK) { |
| 308 | lp->stats.rx_over_errors++; |
| 309 | lp->stats.rx_errors++; |
| 310 | continue; |
| 311 | } else if (bits & LE_R1_ERR) { |
| 312 | /* Count only the end frame as a rx error, |
| 313 | * not the beginning |
| 314 | */ |
| 315 | if (bits & LE_R1_BUF) lp->stats.rx_fifo_errors++; |
| 316 | if (bits & LE_R1_CRC) lp->stats.rx_crc_errors++; |
| 317 | if (bits & LE_R1_OFL) lp->stats.rx_over_errors++; |
| 318 | if (bits & LE_R1_FRA) lp->stats.rx_frame_errors++; |
| 319 | if (bits & LE_R1_EOP) lp->stats.rx_errors++; |
| 320 | } else { |
| 321 | len = (rd->mblength & 0xfff) - 4; |
| 322 | skb = dev_alloc_skb (len+2); |
| 323 | |
| 324 | if (skb == 0) { |
| 325 | printk ("%s: Memory squeeze, deferring packet.\n", |
| 326 | dev->name); |
| 327 | lp->stats.rx_dropped++; |
| 328 | rd->mblength = 0; |
| 329 | rd->rmd1_bits = LE_R1_OWN; |
| 330 | lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask; |
| 331 | return 0; |
| 332 | } |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | skb_reserve (skb, 2); /* 16 byte align */ |
| 335 | skb_put (skb, len); /* make room */ |
| 336 | eth_copy_and_sum(skb, |
| 337 | (unsigned char *)&(ib->rx_buf [lp->rx_new][0]), |
| 338 | len, 0); |
| 339 | skb->protocol = eth_type_trans (skb, dev); |
| 340 | netif_rx (skb); |
| 341 | dev->last_rx = jiffies; |
| 342 | lp->stats.rx_packets++; |
| 343 | lp->stats.rx_bytes += len; |
| 344 | } |
| 345 | |
| 346 | /* Return the packet to the pool */ |
| 347 | rd->mblength = 0; |
| 348 | rd->rmd1_bits = LE_R1_OWN; |
| 349 | lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask; |
| 350 | } |
| 351 | return 0; |
| 352 | } |
| 353 | |
| 354 | static int lance_tx (struct net_device *dev) |
| 355 | { |
| 356 | struct lance_private *lp = netdev_priv(dev); |
| 357 | volatile struct lance_init_block *ib = lp->init_block; |
| 358 | volatile struct lance_tx_desc *td; |
| 359 | int i, j; |
| 360 | int status; |
| 361 | |
| 362 | #ifdef CONFIG_HP300 |
| 363 | blinken_leds(0x80, 0); |
| 364 | #endif |
| 365 | /* csr0 is 2f3 */ |
| 366 | WRITERDP(lp, LE_C0_TINT | LE_C0_INEA); |
| 367 | /* csr0 is 73 */ |
| 368 | |
| 369 | j = lp->tx_old; |
| 370 | for (i = j; i != lp->tx_new; i = j) { |
| 371 | td = &ib->btx_ring [i]; |
| 372 | |
| 373 | /* If we hit a packet not owned by us, stop */ |
| 374 | if (td->tmd1_bits & LE_T1_OWN) |
| 375 | break; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | if (td->tmd1_bits & LE_T1_ERR) { |
| 378 | status = td->misc; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 379 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | lp->stats.tx_errors++; |
| 381 | if (status & LE_T3_RTY) lp->stats.tx_aborted_errors++; |
| 382 | if (status & LE_T3_LCOL) lp->stats.tx_window_errors++; |
| 383 | |
| 384 | if (status & LE_T3_CLOS) { |
| 385 | lp->stats.tx_carrier_errors++; |
| 386 | if (lp->auto_select) { |
| 387 | lp->tpe = 1 - lp->tpe; |
| 388 | printk("%s: Carrier Lost, trying %s\n", |
| 389 | dev->name, lp->tpe?"TPE":"AUI"); |
| 390 | /* Stop the lance */ |
| 391 | WRITERAP(lp, LE_CSR0); |
| 392 | WRITERDP(lp, LE_C0_STOP); |
| 393 | lance_init_ring (dev); |
| 394 | load_csrs (lp); |
| 395 | init_restart_lance (lp); |
| 396 | return 0; |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | /* buffer errors and underflows turn off the transmitter */ |
| 401 | /* Restart the adapter */ |
| 402 | if (status & (LE_T3_BUF|LE_T3_UFL)) { |
| 403 | lp->stats.tx_fifo_errors++; |
| 404 | |
| 405 | printk ("%s: Tx: ERR_BUF|ERR_UFL, restarting\n", |
| 406 | dev->name); |
| 407 | /* Stop the lance */ |
| 408 | WRITERAP(lp, LE_CSR0); |
| 409 | WRITERDP(lp, LE_C0_STOP); |
| 410 | lance_init_ring (dev); |
| 411 | load_csrs (lp); |
| 412 | init_restart_lance (lp); |
| 413 | return 0; |
| 414 | } |
| 415 | } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) { |
| 416 | /* |
| 417 | * So we don't count the packet more than once. |
| 418 | */ |
| 419 | td->tmd1_bits &= ~(LE_T1_POK); |
| 420 | |
| 421 | /* One collision before packet was sent. */ |
| 422 | if (td->tmd1_bits & LE_T1_EONE) |
| 423 | lp->stats.collisions++; |
| 424 | |
| 425 | /* More than one collision, be optimistic. */ |
| 426 | if (td->tmd1_bits & LE_T1_EMORE) |
| 427 | lp->stats.collisions += 2; |
| 428 | |
| 429 | lp->stats.tx_packets++; |
| 430 | } |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 431 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | j = (j + 1) & lp->tx_ring_mod_mask; |
| 433 | } |
| 434 | lp->tx_old = j; |
| 435 | WRITERDP(lp, LE_C0_TINT | LE_C0_INEA); |
| 436 | return 0; |
| 437 | } |
| 438 | |
| 439 | static irqreturn_t |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 440 | lance_interrupt (int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | { |
| 442 | struct net_device *dev = (struct net_device *)dev_id; |
| 443 | struct lance_private *lp = netdev_priv(dev); |
| 444 | int csr0; |
| 445 | |
| 446 | spin_lock (&lp->devlock); |
| 447 | |
| 448 | WRITERAP(lp, LE_CSR0); /* LANCE Controller Status */ |
| 449 | csr0 = READRDP(lp); |
| 450 | |
| 451 | PRINT_RINGS(); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 452 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | if (!(csr0 & LE_C0_INTR)) { /* Check if any interrupt has */ |
| 454 | spin_unlock (&lp->devlock); |
| 455 | return IRQ_NONE; /* been generated by the Lance. */ |
| 456 | } |
| 457 | |
| 458 | /* Acknowledge all the interrupt sources ASAP */ |
| 459 | WRITERDP(lp, csr0 & ~(LE_C0_INEA|LE_C0_TDMD|LE_C0_STOP|LE_C0_STRT|LE_C0_INIT)); |
| 460 | |
| 461 | if ((csr0 & LE_C0_ERR)) { |
| 462 | /* Clear the error condition */ |
| 463 | WRITERDP(lp, LE_C0_BABL|LE_C0_ERR|LE_C0_MISS|LE_C0_INEA); |
| 464 | } |
| 465 | |
| 466 | if (csr0 & LE_C0_RINT) |
| 467 | lance_rx (dev); |
| 468 | |
| 469 | if (csr0 & LE_C0_TINT) |
| 470 | lance_tx (dev); |
| 471 | |
| 472 | /* Log misc errors. */ |
| 473 | if (csr0 & LE_C0_BABL) |
| 474 | lp->stats.tx_errors++; /* Tx babble. */ |
| 475 | if (csr0 & LE_C0_MISS) |
| 476 | lp->stats.rx_errors++; /* Missed a Rx frame. */ |
| 477 | if (csr0 & LE_C0_MERR) { |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 478 | printk("%s: Bus master arbitration failure, status %4.4x.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | dev->name, csr0); |
| 480 | /* Restart the chip. */ |
| 481 | WRITERDP(lp, LE_C0_STRT); |
| 482 | } |
| 483 | |
| 484 | if (lp->tx_full && netif_queue_stopped(dev) && (TX_BUFFS_AVAIL >= 0)) { |
| 485 | lp->tx_full = 0; |
| 486 | netif_wake_queue (dev); |
| 487 | } |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 488 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | WRITERAP(lp, LE_CSR0); |
| 490 | WRITERDP(lp, LE_C0_BABL|LE_C0_CERR|LE_C0_MISS|LE_C0_MERR|LE_C0_IDON|LE_C0_INEA); |
| 491 | |
| 492 | spin_unlock (&lp->devlock); |
| 493 | return IRQ_HANDLED; |
| 494 | } |
| 495 | |
| 496 | int lance_open (struct net_device *dev) |
| 497 | { |
| 498 | struct lance_private *lp = netdev_priv(dev); |
| 499 | int res; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 500 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | /* Install the Interrupt handler. Or we could shunt this out to specific drivers? */ |
Thomas Gleixner | 38515e9 | 2007-02-14 00:33:16 -0800 | [diff] [blame] | 502 | if (request_irq(lp->irq, lance_interrupt, IRQF_SHARED, lp->name, dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | return -EAGAIN; |
| 504 | |
| 505 | res = lance_reset(dev); |
| 506 | spin_lock_init(&lp->devlock); |
| 507 | netif_start_queue (dev); |
| 508 | |
| 509 | return res; |
| 510 | } |
| 511 | |
| 512 | int lance_close (struct net_device *dev) |
| 513 | { |
| 514 | struct lance_private *lp = netdev_priv(dev); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 515 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | netif_stop_queue (dev); |
| 517 | |
| 518 | /* Stop the LANCE */ |
| 519 | WRITERAP(lp, LE_CSR0); |
| 520 | WRITERDP(lp, LE_C0_STOP); |
| 521 | |
| 522 | free_irq(lp->irq, dev); |
| 523 | |
| 524 | return 0; |
| 525 | } |
| 526 | |
| 527 | void lance_tx_timeout(struct net_device *dev) |
| 528 | { |
| 529 | printk("lance_tx_timeout\n"); |
| 530 | lance_reset(dev); |
| 531 | dev->trans_start = jiffies; |
| 532 | netif_wake_queue (dev); |
| 533 | } |
| 534 | |
| 535 | |
| 536 | int lance_start_xmit (struct sk_buff *skb, struct net_device *dev) |
| 537 | { |
| 538 | struct lance_private *lp = netdev_priv(dev); |
| 539 | volatile struct lance_init_block *ib = lp->init_block; |
| 540 | int entry, skblen, len; |
| 541 | static int outs; |
| 542 | unsigned long flags; |
| 543 | |
| 544 | if (!TX_BUFFS_AVAIL) |
| 545 | return -1; |
| 546 | |
| 547 | netif_stop_queue (dev); |
| 548 | |
| 549 | skblen = skb->len; |
| 550 | |
| 551 | #ifdef DEBUG_DRIVER |
| 552 | /* dump the packet */ |
| 553 | { |
| 554 | int i; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 555 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | for (i = 0; i < 64; i++) { |
| 557 | if ((i % 16) == 0) |
| 558 | printk ("\n"); |
| 559 | printk ("%2.2x ", skb->data [i]); |
| 560 | } |
| 561 | } |
| 562 | #endif |
| 563 | len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen; |
| 564 | entry = lp->tx_new & lp->tx_ring_mod_mask; |
| 565 | ib->btx_ring [entry].length = (-len) | 0xf000; |
| 566 | ib->btx_ring [entry].misc = 0; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 567 | |
Geert Uytterhoeven | cfa08bb | 2007-05-01 22:33:05 +0200 | [diff] [blame] | 568 | if (skb->len < ETH_ZLEN) |
| 569 | memset((void *)&ib->tx_buf[entry][0], 0, ETH_ZLEN); |
| 570 | skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | /* Now, give the packet to the lance */ |
| 573 | ib->btx_ring [entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN); |
| 574 | lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask; |
| 575 | |
| 576 | outs++; |
| 577 | /* Kick the lance: transmit now */ |
| 578 | WRITERDP(lp, LE_C0_INEA | LE_C0_TDMD); |
| 579 | dev->trans_start = jiffies; |
| 580 | dev_kfree_skb (skb); |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 581 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | spin_lock_irqsave (&lp->devlock, flags); |
| 583 | if (TX_BUFFS_AVAIL) |
| 584 | netif_start_queue (dev); |
| 585 | else |
| 586 | lp->tx_full = 1; |
| 587 | spin_unlock_irqrestore (&lp->devlock, flags); |
| 588 | |
| 589 | return 0; |
| 590 | } |
| 591 | |
| 592 | struct net_device_stats *lance_get_stats (struct net_device *dev) |
| 593 | { |
| 594 | struct lance_private *lp = netdev_priv(dev); |
| 595 | |
| 596 | return &lp->stats; |
| 597 | } |
| 598 | |
| 599 | /* taken from the depca driver via a2065.c */ |
| 600 | static void lance_load_multicast (struct net_device *dev) |
| 601 | { |
| 602 | struct lance_private *lp = netdev_priv(dev); |
| 603 | volatile struct lance_init_block *ib = lp->init_block; |
| 604 | volatile u16 *mcast_table = (u16 *)&ib->filter; |
| 605 | struct dev_mc_list *dmi=dev->mc_list; |
| 606 | char *addrs; |
| 607 | int i; |
| 608 | u32 crc; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 609 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | /* set all multicast bits */ |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 611 | if (dev->flags & IFF_ALLMULTI){ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | ib->filter [0] = 0xffffffff; |
| 613 | ib->filter [1] = 0xffffffff; |
| 614 | return; |
| 615 | } |
| 616 | /* clear the multicast filter */ |
| 617 | ib->filter [0] = 0; |
| 618 | ib->filter [1] = 0; |
| 619 | |
| 620 | /* Add addresses */ |
| 621 | for (i = 0; i < dev->mc_count; i++){ |
| 622 | addrs = dmi->dmi_addr; |
| 623 | dmi = dmi->next; |
| 624 | |
| 625 | /* multicast address? */ |
| 626 | if (!(*addrs & 1)) |
| 627 | continue; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 628 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | crc = ether_crc_le(6, addrs); |
| 630 | crc = crc >> 26; |
| 631 | mcast_table [crc >> 4] |= 1 << (crc & 0xf); |
| 632 | } |
| 633 | return; |
| 634 | } |
| 635 | |
| 636 | |
| 637 | void lance_set_multicast (struct net_device *dev) |
| 638 | { |
| 639 | struct lance_private *lp = netdev_priv(dev); |
| 640 | volatile struct lance_init_block *ib = lp->init_block; |
| 641 | int stopped; |
| 642 | |
| 643 | stopped = netif_queue_stopped(dev); |
| 644 | if (!stopped) |
| 645 | netif_stop_queue (dev); |
| 646 | |
| 647 | while (lp->tx_old != lp->tx_new) |
| 648 | schedule(); |
| 649 | |
| 650 | WRITERAP(lp, LE_CSR0); |
| 651 | WRITERDP(lp, LE_C0_STOP); |
| 652 | lance_init_ring (dev); |
| 653 | |
| 654 | if (dev->flags & IFF_PROMISC) { |
| 655 | ib->mode |= LE_MO_PROM; |
| 656 | } else { |
| 657 | ib->mode &= ~LE_MO_PROM; |
| 658 | lance_load_multicast (dev); |
| 659 | } |
| 660 | load_csrs (lp); |
| 661 | init_restart_lance (lp); |
| 662 | |
| 663 | if (!stopped) |
| 664 | netif_start_queue (dev); |
| 665 | } |
| 666 | |
| 667 | #ifdef CONFIG_NET_POLL_CONTROLLER |
| 668 | void lance_poll(struct net_device *dev) |
| 669 | { |
| 670 | struct lance_private *lp = netdev_priv(dev); |
| 671 | |
| 672 | spin_lock (&lp->devlock); |
| 673 | WRITERAP(lp, LE_CSR0); |
| 674 | WRITERDP(lp, LE_C0_STRT); |
| 675 | spin_unlock (&lp->devlock); |
Al Viro | 2850bc2 | 2006-10-07 14:16:45 +0100 | [diff] [blame] | 676 | lance_interrupt(dev->irq, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | } |
| 678 | #endif |
| 679 | |
| 680 | MODULE_LICENSE("GPL"); |