Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* 3c507.c: An EtherLink16 device driver for Linux. */ |
| 2 | /* |
| 3 | Written 1993,1994 by Donald Becker. |
| 4 | |
| 5 | Copyright 1993 United States Government as represented by the |
| 6 | Director, National Security Agency. |
| 7 | |
| 8 | This software may be used and distributed according to the terms |
| 9 | of the GNU General Public License, incorporated herein by reference. |
| 10 | |
| 11 | The author may be reached as becker@scyld.com, or C/O |
| 12 | Scyld Computing Corporation |
| 13 | 410 Severn Ave., Suite 210 |
| 14 | Annapolis MD 21403 |
| 15 | |
| 16 | |
| 17 | Thanks go to jennings@Montrouge.SMR.slb.com ( Patrick Jennings) |
| 18 | and jrs@world.std.com (Rick Sladkey) for testing and bugfixes. |
| 19 | Mark Salazar <leslie@access.digex.net> made the changes for cards with |
| 20 | only 16K packet buffers. |
| 21 | |
| 22 | Things remaining to do: |
| 23 | Verify that the tx and rx buffers don't have fencepost errors. |
| 24 | Move the theory of operation and memory map documentation. |
| 25 | The statistics need to be updated correctly. |
| 26 | */ |
| 27 | |
| 28 | #define DRV_NAME "3c507" |
| 29 | #define DRV_VERSION "1.10a" |
| 30 | #define DRV_RELDATE "11/17/2001" |
| 31 | |
| 32 | static const char version[] = |
| 33 | DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Donald Becker (becker@scyld.com)\n"; |
| 34 | |
| 35 | /* |
| 36 | Sources: |
| 37 | This driver wouldn't have been written with the availability of the |
| 38 | Crynwr driver source code. It provided a known-working implementation |
| 39 | that filled in the gaping holes of the Intel documentation. Three cheers |
| 40 | for Russ Nelson. |
| 41 | |
| 42 | Intel Microcommunications Databook, Vol. 1, 1990. It provides just enough |
| 43 | info that the casual reader might think that it documents the i82586 :-<. |
| 44 | */ |
| 45 | |
| 46 | #include <linux/module.h> |
| 47 | #include <linux/kernel.h> |
| 48 | #include <linux/types.h> |
| 49 | #include <linux/fcntl.h> |
| 50 | #include <linux/interrupt.h> |
| 51 | #include <linux/ioport.h> |
| 52 | #include <linux/in.h> |
| 53 | #include <linux/string.h> |
| 54 | #include <linux/spinlock.h> |
| 55 | #include <linux/ethtool.h> |
| 56 | #include <linux/errno.h> |
| 57 | #include <linux/netdevice.h> |
| 58 | #include <linux/etherdevice.h> |
| 59 | #include <linux/skbuff.h> |
| 60 | #include <linux/slab.h> |
| 61 | #include <linux/init.h> |
| 62 | #include <linux/bitops.h> |
| 63 | |
| 64 | #include <asm/dma.h> |
| 65 | #include <asm/io.h> |
| 66 | #include <asm/system.h> |
| 67 | #include <asm/uaccess.h> |
| 68 | |
| 69 | /* use 0 for production, 1 for verification, 2..7 for debug */ |
| 70 | #ifndef NET_DEBUG |
| 71 | #define NET_DEBUG 1 |
| 72 | #endif |
| 73 | static unsigned int net_debug = NET_DEBUG; |
| 74 | #define debug net_debug |
| 75 | |
| 76 | |
| 77 | /* |
| 78 | Details of the i82586. |
| 79 | |
| 80 | You'll really need the databook to understand the details of this part, |
| 81 | but the outline is that the i82586 has two separate processing units. |
| 82 | Both are started from a list of three configuration tables, of which only |
| 83 | the last, the System Control Block (SCB), is used after reset-time. The SCB |
| 84 | has the following fields: |
| 85 | Status word |
| 86 | Command word |
| 87 | Tx/Command block addr. |
| 88 | Rx block addr. |
| 89 | The command word accepts the following controls for the Tx and Rx units: |
| 90 | */ |
| 91 | |
| 92 | #define CUC_START 0x0100 |
| 93 | #define CUC_RESUME 0x0200 |
| 94 | #define CUC_SUSPEND 0x0300 |
| 95 | #define RX_START 0x0010 |
| 96 | #define RX_RESUME 0x0020 |
| 97 | #define RX_SUSPEND 0x0030 |
| 98 | |
| 99 | /* The Rx unit uses a list of frame descriptors and a list of data buffer |
| 100 | descriptors. We use full-sized (1518 byte) data buffers, so there is |
| 101 | a one-to-one pairing of frame descriptors to buffer descriptors. |
| 102 | |
| 103 | The Tx ("command") unit executes a list of commands that look like: |
| 104 | Status word Written by the 82586 when the command is done. |
| 105 | Command word Command in lower 3 bits, post-command action in upper 3 |
| 106 | Link word The address of the next command. |
| 107 | Parameters (as needed). |
| 108 | |
| 109 | Some definitions related to the Command Word are: |
| 110 | */ |
| 111 | #define CMD_EOL 0x8000 /* The last command of the list, stop. */ |
| 112 | #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */ |
| 113 | #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */ |
| 114 | |
| 115 | enum commands { |
| 116 | CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3, |
| 117 | CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7}; |
| 118 | |
| 119 | /* Information that need to be kept for each board. */ |
| 120 | struct net_local { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | int last_restart; |
| 122 | ushort rx_head; |
| 123 | ushort rx_tail; |
| 124 | ushort tx_head; |
| 125 | ushort tx_cmd_link; |
| 126 | ushort tx_reap; |
| 127 | ushort tx_pkts_in_ring; |
| 128 | spinlock_t lock; |
| 129 | void __iomem *base; |
| 130 | }; |
| 131 | |
| 132 | /* |
| 133 | Details of the EtherLink16 Implementation |
| 134 | The 3c507 is a generic shared-memory i82586 implementation. |
| 135 | The host can map 16K, 32K, 48K, or 64K of the 64K memory into |
| 136 | 0x0[CD][08]0000, or all 64K into 0xF[02468]0000. |
| 137 | */ |
| 138 | |
| 139 | /* Offsets from the base I/O address. */ |
| 140 | #define SA_DATA 0 /* Station address data, or 3Com signature. */ |
| 141 | #define MISC_CTRL 6 /* Switch the SA_DATA banks, and bus config bits. */ |
| 142 | #define RESET_IRQ 10 /* Reset the latched IRQ line. */ |
| 143 | #define SIGNAL_CA 11 /* Frob the 82586 Channel Attention line. */ |
| 144 | #define ROM_CONFIG 13 |
| 145 | #define MEM_CONFIG 14 |
| 146 | #define IRQ_CONFIG 15 |
| 147 | #define EL16_IO_EXTENT 16 |
| 148 | |
| 149 | /* The ID port is used at boot-time to locate the ethercard. */ |
| 150 | #define ID_PORT 0x100 |
| 151 | |
| 152 | /* Offsets to registers in the mailbox (SCB). */ |
| 153 | #define iSCB_STATUS 0x8 |
| 154 | #define iSCB_CMD 0xA |
| 155 | #define iSCB_CBL 0xC /* Command BLock offset. */ |
| 156 | #define iSCB_RFA 0xE /* Rx Frame Area offset. */ |
| 157 | |
| 158 | /* Since the 3c507 maps the shared memory window so that the last byte is |
| 159 | at 82586 address FFFF, the first byte is at 82586 address 0, 16K, 32K, or |
| 160 | 48K corresponding to window sizes of 64K, 48K, 32K and 16K respectively. |
| 161 | We can account for this be setting the 'SBC Base' entry in the ISCP table |
| 162 | below for all the 16 bit offset addresses, and also adding the 'SCB Base' |
| 163 | value to all 24 bit physical addresses (in the SCP table and the TX and RX |
| 164 | Buffer Descriptors). |
| 165 | -Mark |
| 166 | */ |
| 167 | #define SCB_BASE ((unsigned)64*1024 - (dev->mem_end - dev->mem_start)) |
| 168 | |
| 169 | /* |
| 170 | What follows in 'init_words[]' is the "program" that is downloaded to the |
| 171 | 82586 memory. It's mostly tables and command blocks, and starts at the |
| 172 | reset address 0xfffff6. This is designed to be similar to the EtherExpress, |
| 173 | thus the unusual location of the SCB at 0x0008. |
| 174 | |
| 175 | Even with the additional "don't care" values, doing it this way takes less |
| 176 | program space than initializing the individual tables, and I feel it's much |
| 177 | cleaner. |
| 178 | |
| 179 | The databook is particularly useless for the first two structures, I had |
| 180 | to use the Crynwr driver as an example. |
| 181 | |
| 182 | The memory setup is as follows: |
| 183 | */ |
| 184 | |
| 185 | #define CONFIG_CMD 0x0018 |
| 186 | #define SET_SA_CMD 0x0024 |
| 187 | #define SA_OFFSET 0x002A |
| 188 | #define IDLELOOP 0x30 |
| 189 | #define TDR_CMD 0x38 |
| 190 | #define TDR_TIME 0x3C |
| 191 | #define DUMP_CMD 0x40 |
| 192 | #define DIAG_CMD 0x48 |
| 193 | #define SET_MC_CMD 0x4E |
| 194 | #define DUMP_DATA 0x56 /* A 170 byte buffer for dump and Set-MC into. */ |
| 195 | |
| 196 | #define TX_BUF_START 0x0100 |
| 197 | #define NUM_TX_BUFS 5 |
| 198 | #define TX_BUF_SIZE (1518+14+20+16) /* packet+header+TBD */ |
| 199 | |
| 200 | #define RX_BUF_START 0x2000 |
| 201 | #define RX_BUF_SIZE (1518+14+18) /* packet+header+RBD */ |
| 202 | #define RX_BUF_END (dev->mem_end - dev->mem_start) |
| 203 | |
| 204 | #define TX_TIMEOUT 5 |
| 205 | |
| 206 | /* |
| 207 | That's it: only 86 bytes to set up the beast, including every extra |
| 208 | command available. The 170 byte buffer at DUMP_DATA is shared between the |
| 209 | Dump command (called only by the diagnostic program) and the SetMulticastList |
| 210 | command. |
| 211 | |
| 212 | To complete the memory setup you only have to write the station address at |
| 213 | SA_OFFSET and create the Tx & Rx buffer lists. |
| 214 | |
| 215 | The Tx command chain and buffer list is setup as follows: |
| 216 | A Tx command table, with the data buffer pointing to... |
| 217 | A Tx data buffer descriptor. The packet is in a single buffer, rather than |
| 218 | chaining together several smaller buffers. |
| 219 | A NoOp command, which initially points to itself, |
| 220 | And the packet data. |
| 221 | |
| 222 | A transmit is done by filling in the Tx command table and data buffer, |
| 223 | re-writing the NoOp command, and finally changing the offset of the last |
| 224 | command to point to the current Tx command. When the Tx command is finished, |
| 225 | it jumps to the NoOp, when it loops until the next Tx command changes the |
| 226 | "link offset" in the NoOp. This way the 82586 never has to go through the |
| 227 | slow restart sequence. |
| 228 | |
| 229 | The Rx buffer list is set up in the obvious ring structure. We have enough |
| 230 | memory (and low enough interrupt latency) that we can avoid the complicated |
| 231 | Rx buffer linked lists by alway associating a full-size Rx data buffer with |
| 232 | each Rx data frame. |
| 233 | |
| 234 | I current use four transmit buffers starting at TX_BUF_START (0x0100), and |
| 235 | use the rest of memory, from RX_BUF_START to RX_BUF_END, for Rx buffers. |
| 236 | |
| 237 | */ |
| 238 | |
| 239 | static unsigned short init_words[] = { |
| 240 | /* System Configuration Pointer (SCP). */ |
| 241 | 0x0000, /* Set bus size to 16 bits. */ |
| 242 | 0,0, /* pad words. */ |
| 243 | 0x0000,0x0000, /* ISCP phys addr, set in init_82586_mem(). */ |
| 244 | |
| 245 | /* Intermediate System Configuration Pointer (ISCP). */ |
| 246 | 0x0001, /* Status word that's cleared when init is done. */ |
| 247 | 0x0008,0,0, /* SCB offset, (skip, skip) */ |
| 248 | |
| 249 | /* System Control Block (SCB). */ |
| 250 | 0,0xf000|RX_START|CUC_START, /* SCB status and cmd. */ |
| 251 | CONFIG_CMD, /* Command list pointer, points to Configure. */ |
| 252 | RX_BUF_START, /* Rx block list. */ |
| 253 | 0,0,0,0, /* Error count: CRC, align, buffer, overrun. */ |
| 254 | |
| 255 | /* 0x0018: Configure command. Change to put MAC data with packet. */ |
| 256 | 0, CmdConfigure, /* Status, command. */ |
| 257 | SET_SA_CMD, /* Next command is Set Station Addr. */ |
| 258 | 0x0804, /* "4" bytes of config data, 8 byte FIFO. */ |
| 259 | 0x2e40, /* Magic values, including MAC data location. */ |
| 260 | 0, /* Unused pad word. */ |
| 261 | |
| 262 | /* 0x0024: Setup station address command. */ |
| 263 | 0, CmdSASetup, |
| 264 | SET_MC_CMD, /* Next command. */ |
| 265 | 0xaa00,0xb000,0x0bad, /* Station address (to be filled in) */ |
| 266 | |
| 267 | /* 0x0030: NOP, looping back to itself. Point to first Tx buffer to Tx. */ |
| 268 | 0, CmdNOp, IDLELOOP, 0 /* pad */, |
| 269 | |
| 270 | /* 0x0038: A unused Time-Domain Reflectometer command. */ |
| 271 | 0, CmdTDR, IDLELOOP, 0, |
| 272 | |
| 273 | /* 0x0040: An unused Dump State command. */ |
| 274 | 0, CmdDump, IDLELOOP, DUMP_DATA, |
| 275 | |
| 276 | /* 0x0048: An unused Diagnose command. */ |
| 277 | 0, CmdDiagnose, IDLELOOP, |
| 278 | |
| 279 | /* 0x004E: An empty set-multicast-list command. */ |
| 280 | 0, CmdMulticastList, IDLELOOP, 0, |
| 281 | }; |
| 282 | |
| 283 | /* Index to functions, as function prototypes. */ |
| 284 | |
| 285 | static int el16_probe1(struct net_device *dev, int ioaddr); |
| 286 | static int el16_open(struct net_device *dev); |
Stephen Hemminger | 27a1de9 | 2009-08-31 19:50:54 +0000 | [diff] [blame] | 287 | static netdev_tx_t el16_send_packet(struct sk_buff *skb, |
| 288 | struct net_device *dev); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 289 | static irqreturn_t el16_interrupt(int irq, void *dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | static void el16_rx(struct net_device *dev); |
| 291 | static int el16_close(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | static void el16_tx_timeout (struct net_device *dev); |
| 293 | |
| 294 | static void hardware_send_packet(struct net_device *dev, void *buf, short length, short pad); |
| 295 | static void init_82586_mem(struct net_device *dev); |
Jeff Garzik | 7282d49 | 2006-09-13 14:30:00 -0400 | [diff] [blame] | 296 | static const struct ethtool_ops netdev_ethtool_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | static void init_rx_bufs(struct net_device *); |
| 298 | |
| 299 | static int io = 0x300; |
| 300 | static int irq; |
| 301 | static int mem_start; |
| 302 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 303 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | /* Check for a network adaptor of this type, and return '0' iff one exists. |
| 305 | If dev->base_addr == 0, probe all likely locations. |
| 306 | If dev->base_addr == 1, always return failure. |
| 307 | If dev->base_addr == 2, (detachable devices only) allocate space for the |
| 308 | device and return success. |
| 309 | */ |
| 310 | |
| 311 | struct net_device * __init el16_probe(int unit) |
| 312 | { |
| 313 | struct net_device *dev = alloc_etherdev(sizeof(struct net_local)); |
| 314 | static unsigned ports[] = { 0x300, 0x320, 0x340, 0x280, 0}; |
| 315 | unsigned *port; |
| 316 | int err = -ENODEV; |
| 317 | |
| 318 | if (!dev) |
| 319 | return ERR_PTR(-ENODEV); |
| 320 | |
| 321 | if (unit >= 0) { |
| 322 | sprintf(dev->name, "eth%d", unit); |
| 323 | netdev_boot_setup_check(dev); |
| 324 | io = dev->base_addr; |
| 325 | irq = dev->irq; |
| 326 | mem_start = dev->mem_start & 15; |
| 327 | } |
| 328 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | if (io > 0x1ff) /* Check a single specified location. */ |
| 330 | err = el16_probe1(dev, io); |
| 331 | else if (io != 0) |
| 332 | err = -ENXIO; /* Don't probe at all. */ |
| 333 | else { |
| 334 | for (port = ports; *port; port++) { |
| 335 | err = el16_probe1(dev, *port); |
| 336 | if (!err) |
| 337 | break; |
| 338 | } |
| 339 | } |
| 340 | |
| 341 | if (err) |
| 342 | goto out; |
| 343 | err = register_netdev(dev); |
| 344 | if (err) |
| 345 | goto out1; |
| 346 | return dev; |
| 347 | out1: |
| 348 | free_irq(dev->irq, dev); |
| 349 | iounmap(((struct net_local *)netdev_priv(dev))->base); |
| 350 | release_region(dev->base_addr, EL16_IO_EXTENT); |
| 351 | out: |
| 352 | free_netdev(dev); |
| 353 | return ERR_PTR(err); |
| 354 | } |
| 355 | |
Stephen Hemminger | 1722de5 | 2009-01-09 13:01:13 +0000 | [diff] [blame] | 356 | static const struct net_device_ops netdev_ops = { |
| 357 | .ndo_open = el16_open, |
| 358 | .ndo_stop = el16_close, |
| 359 | .ndo_start_xmit = el16_send_packet, |
| 360 | .ndo_tx_timeout = el16_tx_timeout, |
| 361 | .ndo_change_mtu = eth_change_mtu, |
| 362 | .ndo_set_mac_address = eth_mac_addr, |
| 363 | .ndo_validate_addr = eth_validate_addr, |
| 364 | }; |
| 365 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | static int __init el16_probe1(struct net_device *dev, int ioaddr) |
| 367 | { |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 368 | static unsigned char init_ID_done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | int i, irq, irqval, retval; |
| 370 | struct net_local *lp; |
| 371 | |
| 372 | if (init_ID_done == 0) { |
| 373 | ushort lrs_state = 0xff; |
| 374 | /* Send the ID sequence to the ID_PORT to enable the board(s). */ |
| 375 | outb(0x00, ID_PORT); |
| 376 | for(i = 0; i < 255; i++) { |
| 377 | outb(lrs_state, ID_PORT); |
| 378 | lrs_state <<= 1; |
| 379 | if (lrs_state & 0x100) |
| 380 | lrs_state ^= 0xe7; |
| 381 | } |
| 382 | outb(0x00, ID_PORT); |
| 383 | init_ID_done = 1; |
| 384 | } |
| 385 | |
| 386 | if (!request_region(ioaddr, EL16_IO_EXTENT, DRV_NAME)) |
| 387 | return -ENODEV; |
| 388 | |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 389 | if ((inb(ioaddr) != '*') || (inb(ioaddr + 1) != '3') || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | (inb(ioaddr + 2) != 'C') || (inb(ioaddr + 3) != 'O')) { |
| 391 | retval = -ENODEV; |
| 392 | goto out; |
| 393 | } |
| 394 | |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 395 | pr_info("%s: 3c507 at %#x,", dev->name, ioaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | |
| 397 | /* We should make a few more checks here, like the first three octets of |
| 398 | the S.A. for the manufacturer's code. */ |
| 399 | |
| 400 | irq = inb(ioaddr + IRQ_CONFIG) & 0x0f; |
| 401 | |
Joe Perches | a0607fd | 2009-11-18 23:29:17 -0800 | [diff] [blame] | 402 | irqval = request_irq(irq, el16_interrupt, 0, DRV_NAME, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | if (irqval) { |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 404 | pr_cont("\n"); |
| 405 | pr_err("3c507: unable to get IRQ %d (irqval=%d).\n", irq, irqval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | retval = -EAGAIN; |
| 407 | goto out; |
| 408 | } |
| 409 | |
| 410 | /* We've committed to using the board, and can start filling in *dev. */ |
| 411 | dev->base_addr = ioaddr; |
| 412 | |
| 413 | outb(0x01, ioaddr + MISC_CTRL); |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 414 | for (i = 0; i < 6; i++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | dev->dev_addr[i] = inb(ioaddr + i); |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 416 | pr_cont(" %pM", dev->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | |
| 418 | if (mem_start) |
| 419 | net_debug = mem_start & 7; |
| 420 | |
| 421 | #ifdef MEM_BASE |
| 422 | dev->mem_start = MEM_BASE; |
| 423 | dev->mem_end = dev->mem_start + 0x10000; |
| 424 | #else |
| 425 | { |
| 426 | int base; |
| 427 | int size; |
| 428 | char mem_config = inb(ioaddr + MEM_CONFIG); |
| 429 | if (mem_config & 0x20) { |
| 430 | size = 64*1024; |
| 431 | base = 0xf00000 + (mem_config & 0x08 ? 0x080000 |
| 432 | : ((mem_config & 3) << 17)); |
| 433 | } else { |
| 434 | size = ((mem_config & 3) + 1) << 14; |
| 435 | base = 0x0c0000 + ( (mem_config & 0x18) << 12); |
| 436 | } |
| 437 | dev->mem_start = base; |
| 438 | dev->mem_end = base + size; |
| 439 | } |
| 440 | #endif |
| 441 | |
| 442 | dev->if_port = (inb(ioaddr + ROM_CONFIG) & 0x80) ? 1 : 0; |
| 443 | dev->irq = inb(ioaddr + IRQ_CONFIG) & 0x0f; |
| 444 | |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 445 | pr_cont(", IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->irq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | dev->if_port ? "ex" : "in", dev->mem_start, dev->mem_end-1); |
| 447 | |
| 448 | if (net_debug) |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 449 | pr_debug("%s", version); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | |
| 451 | lp = netdev_priv(dev); |
| 452 | memset(lp, 0, sizeof(*lp)); |
| 453 | spin_lock_init(&lp->lock); |
| 454 | lp->base = ioremap(dev->mem_start, RX_BUF_END); |
| 455 | if (!lp->base) { |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 456 | pr_err("3c507: unable to remap memory\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | retval = -EAGAIN; |
| 458 | goto out1; |
| 459 | } |
| 460 | |
Stephen Hemminger | 1722de5 | 2009-01-09 13:01:13 +0000 | [diff] [blame] | 461 | dev->netdev_ops = &netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | dev->watchdog_timeo = TX_TIMEOUT; |
| 463 | dev->ethtool_ops = &netdev_ethtool_ops; |
| 464 | dev->flags &= ~IFF_MULTICAST; /* Multicast doesn't work */ |
| 465 | return 0; |
| 466 | out1: |
| 467 | free_irq(dev->irq, dev); |
| 468 | out: |
| 469 | release_region(ioaddr, EL16_IO_EXTENT); |
| 470 | return retval; |
| 471 | } |
| 472 | |
| 473 | static int el16_open(struct net_device *dev) |
| 474 | { |
| 475 | /* Initialize the 82586 memory and start it. */ |
| 476 | init_82586_mem(dev); |
| 477 | |
| 478 | netif_start_queue(dev); |
| 479 | return 0; |
| 480 | } |
| 481 | |
| 482 | |
| 483 | static void el16_tx_timeout (struct net_device *dev) |
| 484 | { |
| 485 | struct net_local *lp = netdev_priv(dev); |
| 486 | int ioaddr = dev->base_addr; |
| 487 | void __iomem *shmem = lp->base; |
| 488 | |
| 489 | if (net_debug > 1) |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 490 | pr_debug("%s: transmit timed out, %s? ", dev->name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | readw(shmem + iSCB_STATUS) & 0x8000 ? "IRQ conflict" : |
| 492 | "network cable problem"); |
| 493 | /* Try to restart the adaptor. */ |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 494 | if (lp->last_restart == dev->stats.tx_packets) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | if (net_debug > 1) |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 496 | pr_cont("Resetting board.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | /* Completely reset the adaptor. */ |
| 498 | init_82586_mem (dev); |
| 499 | lp->tx_pkts_in_ring = 0; |
| 500 | } else { |
| 501 | /* Issue the channel attention signal and hope it "gets better". */ |
| 502 | if (net_debug > 1) |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 503 | pr_cont("Kicking board.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | writew(0xf000 | CUC_START | RX_START, shmem + iSCB_CMD); |
| 505 | outb (0, ioaddr + SIGNAL_CA); /* Issue channel-attn. */ |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 506 | lp->last_restart = dev->stats.tx_packets; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | } |
| 508 | dev->trans_start = jiffies; |
| 509 | netif_wake_queue (dev); |
| 510 | } |
| 511 | |
| 512 | |
Stephen Hemminger | 27a1de9 | 2009-08-31 19:50:54 +0000 | [diff] [blame] | 513 | static netdev_tx_t el16_send_packet (struct sk_buff *skb, |
| 514 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | { |
| 516 | struct net_local *lp = netdev_priv(dev); |
| 517 | int ioaddr = dev->base_addr; |
| 518 | unsigned long flags; |
| 519 | short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; |
| 520 | unsigned char *buf = skb->data; |
| 521 | |
| 522 | netif_stop_queue (dev); |
| 523 | |
| 524 | spin_lock_irqsave (&lp->lock, flags); |
| 525 | |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 526 | dev->stats.tx_bytes += length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | /* Disable the 82586's input to the interrupt line. */ |
| 528 | outb (0x80, ioaddr + MISC_CTRL); |
| 529 | |
| 530 | hardware_send_packet (dev, buf, skb->len, length - skb->len); |
| 531 | |
| 532 | dev->trans_start = jiffies; |
| 533 | /* Enable the 82586 interrupt input. */ |
| 534 | outb (0x84, ioaddr + MISC_CTRL); |
| 535 | |
| 536 | spin_unlock_irqrestore (&lp->lock, flags); |
| 537 | |
| 538 | dev_kfree_skb (skb); |
| 539 | |
| 540 | /* You might need to clean up and record Tx statistics here. */ |
| 541 | |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 542 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | /* The typical workload of the driver: |
| 546 | Handle the network interface interrupts. */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 547 | static irqreturn_t el16_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | { |
| 549 | struct net_device *dev = dev_id; |
| 550 | struct net_local *lp; |
| 551 | int ioaddr, status, boguscount = 0; |
| 552 | ushort ack_cmd = 0; |
| 553 | void __iomem *shmem; |
| 554 | |
| 555 | if (dev == NULL) { |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 556 | pr_err("%s: net_interrupt(): irq %d for unknown device.\n", |
| 557 | dev->name, irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | return IRQ_NONE; |
| 559 | } |
| 560 | |
| 561 | ioaddr = dev->base_addr; |
| 562 | lp = netdev_priv(dev); |
| 563 | shmem = lp->base; |
| 564 | |
| 565 | spin_lock(&lp->lock); |
| 566 | |
| 567 | status = readw(shmem+iSCB_STATUS); |
| 568 | |
| 569 | if (net_debug > 4) { |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 570 | pr_debug("%s: 3c507 interrupt, status %4.4x.\n", dev->name, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | } |
| 572 | |
| 573 | /* Disable the 82586's input to the interrupt line. */ |
| 574 | outb(0x80, ioaddr + MISC_CTRL); |
| 575 | |
| 576 | /* Reap the Tx packet buffers. */ |
| 577 | while (lp->tx_pkts_in_ring) { |
| 578 | unsigned short tx_status = readw(shmem+lp->tx_reap); |
| 579 | if (!(tx_status & 0x8000)) { |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 580 | if (net_debug > 5) |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 581 | pr_debug("Tx command incomplete (%#x).\n", lp->tx_reap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | break; |
| 583 | } |
| 584 | /* Tx unsuccessful or some interesting status bit set. */ |
| 585 | if (!(tx_status & 0x2000) || (tx_status & 0x0f3f)) { |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 586 | dev->stats.tx_errors++; |
| 587 | if (tx_status & 0x0600) dev->stats.tx_carrier_errors++; |
| 588 | if (tx_status & 0x0100) dev->stats.tx_fifo_errors++; |
| 589 | if (!(tx_status & 0x0040)) dev->stats.tx_heartbeat_errors++; |
| 590 | if (tx_status & 0x0020) dev->stats.tx_aborted_errors++; |
| 591 | dev->stats.collisions += tx_status & 0xf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | } |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 593 | dev->stats.tx_packets++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | if (net_debug > 5) |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 595 | pr_debug("Reaped %x, Tx status %04x.\n" , lp->tx_reap, tx_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | lp->tx_reap += TX_BUF_SIZE; |
| 597 | if (lp->tx_reap > RX_BUF_START - TX_BUF_SIZE) |
| 598 | lp->tx_reap = TX_BUF_START; |
| 599 | |
| 600 | lp->tx_pkts_in_ring--; |
| 601 | /* There is always more space in the Tx ring buffer now. */ |
| 602 | netif_wake_queue(dev); |
| 603 | |
| 604 | if (++boguscount > 10) |
| 605 | break; |
| 606 | } |
| 607 | |
| 608 | if (status & 0x4000) { /* Packet received. */ |
| 609 | if (net_debug > 5) |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 610 | pr_debug("Received packet, rx_head %04x.\n", lp->rx_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | el16_rx(dev); |
| 612 | } |
| 613 | |
| 614 | /* Acknowledge the interrupt sources. */ |
| 615 | ack_cmd = status & 0xf000; |
| 616 | |
| 617 | if ((status & 0x0700) != 0x0200 && netif_running(dev)) { |
| 618 | if (net_debug) |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 619 | pr_debug("%s: Command unit stopped, status %04x, restarting.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | dev->name, status); |
| 621 | /* If this ever occurs we should really re-write the idle loop, reset |
| 622 | the Tx list, and do a complete restart of the command unit. |
| 623 | For now we rely on the Tx timeout if the resume doesn't work. */ |
| 624 | ack_cmd |= CUC_RESUME; |
| 625 | } |
| 626 | |
| 627 | if ((status & 0x0070) != 0x0040 && netif_running(dev)) { |
| 628 | /* The Rx unit is not ready, it must be hung. Restart the receiver by |
| 629 | initializing the rx buffers, and issuing an Rx start command. */ |
| 630 | if (net_debug) |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 631 | pr_debug("%s: Rx unit stopped, status %04x, restarting.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | dev->name, status); |
| 633 | init_rx_bufs(dev); |
| 634 | writew(RX_BUF_START,shmem+iSCB_RFA); |
| 635 | ack_cmd |= RX_START; |
| 636 | } |
| 637 | |
| 638 | writew(ack_cmd,shmem+iSCB_CMD); |
| 639 | outb(0, ioaddr + SIGNAL_CA); /* Issue channel-attn. */ |
| 640 | |
| 641 | /* Clear the latched interrupt. */ |
| 642 | outb(0, ioaddr + RESET_IRQ); |
| 643 | |
| 644 | /* Enable the 82586's interrupt input. */ |
| 645 | outb(0x84, ioaddr + MISC_CTRL); |
| 646 | spin_unlock(&lp->lock); |
| 647 | return IRQ_HANDLED; |
| 648 | } |
| 649 | |
| 650 | static int el16_close(struct net_device *dev) |
| 651 | { |
| 652 | struct net_local *lp = netdev_priv(dev); |
| 653 | int ioaddr = dev->base_addr; |
| 654 | void __iomem *shmem = lp->base; |
| 655 | |
| 656 | netif_stop_queue(dev); |
| 657 | |
| 658 | /* Flush the Tx and disable Rx. */ |
| 659 | writew(RX_SUSPEND | CUC_SUSPEND,shmem+iSCB_CMD); |
| 660 | outb(0, ioaddr + SIGNAL_CA); |
| 661 | |
| 662 | /* Disable the 82586's input to the interrupt line. */ |
| 663 | outb(0x80, ioaddr + MISC_CTRL); |
| 664 | |
| 665 | /* We always physically use the IRQ line, so we don't do free_irq(). */ |
| 666 | |
| 667 | /* Update the statistics here. */ |
| 668 | |
| 669 | return 0; |
| 670 | } |
| 671 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | /* Initialize the Rx-block list. */ |
| 673 | static void init_rx_bufs(struct net_device *dev) |
| 674 | { |
| 675 | struct net_local *lp = netdev_priv(dev); |
| 676 | void __iomem *write_ptr; |
| 677 | unsigned short SCB_base = SCB_BASE; |
| 678 | |
| 679 | int cur_rxbuf = lp->rx_head = RX_BUF_START; |
| 680 | |
| 681 | /* Initialize each Rx frame + data buffer. */ |
| 682 | do { /* While there is room for one more. */ |
| 683 | |
| 684 | write_ptr = lp->base + cur_rxbuf; |
| 685 | |
| 686 | writew(0x0000,write_ptr); /* Status */ |
| 687 | writew(0x0000,write_ptr+=2); /* Command */ |
| 688 | writew(cur_rxbuf + RX_BUF_SIZE,write_ptr+=2); /* Link */ |
| 689 | writew(cur_rxbuf + 22,write_ptr+=2); /* Buffer offset */ |
| 690 | writew(0x0000,write_ptr+=2); /* Pad for dest addr. */ |
| 691 | writew(0x0000,write_ptr+=2); |
| 692 | writew(0x0000,write_ptr+=2); |
| 693 | writew(0x0000,write_ptr+=2); /* Pad for source addr. */ |
| 694 | writew(0x0000,write_ptr+=2); |
| 695 | writew(0x0000,write_ptr+=2); |
| 696 | writew(0x0000,write_ptr+=2); /* Pad for protocol. */ |
| 697 | |
| 698 | writew(0x0000,write_ptr+=2); /* Buffer: Actual count */ |
| 699 | writew(-1,write_ptr+=2); /* Buffer: Next (none). */ |
| 700 | writew(cur_rxbuf + 0x20 + SCB_base,write_ptr+=2);/* Buffer: Address low */ |
| 701 | writew(0x0000,write_ptr+=2); |
| 702 | /* Finally, the number of bytes in the buffer. */ |
| 703 | writew(0x8000 + RX_BUF_SIZE-0x20,write_ptr+=2); |
| 704 | |
| 705 | lp->rx_tail = cur_rxbuf; |
| 706 | cur_rxbuf += RX_BUF_SIZE; |
| 707 | } while (cur_rxbuf <= RX_BUF_END - RX_BUF_SIZE); |
| 708 | |
| 709 | /* Terminate the list by setting the EOL bit, and wrap the pointer to make |
| 710 | the list a ring. */ |
| 711 | write_ptr = lp->base + lp->rx_tail + 2; |
| 712 | writew(0xC000,write_ptr); /* Command, mark as last. */ |
| 713 | writew(lp->rx_head,write_ptr+2); /* Link */ |
| 714 | } |
| 715 | |
| 716 | static void init_82586_mem(struct net_device *dev) |
| 717 | { |
| 718 | struct net_local *lp = netdev_priv(dev); |
| 719 | short ioaddr = dev->base_addr; |
| 720 | void __iomem *shmem = lp->base; |
| 721 | |
| 722 | /* Enable loopback to protect the wire while starting up, |
| 723 | and hold the 586 in reset during the memory initialization. */ |
| 724 | outb(0x20, ioaddr + MISC_CTRL); |
| 725 | |
| 726 | /* Fix the ISCP address and base. */ |
| 727 | init_words[3] = SCB_BASE; |
| 728 | init_words[7] = SCB_BASE; |
| 729 | |
| 730 | /* Write the words at 0xfff6 (address-aliased to 0xfffff6). */ |
| 731 | memcpy_toio(lp->base + RX_BUF_END - 10, init_words, 10); |
| 732 | |
| 733 | /* Write the words at 0x0000. */ |
| 734 | memcpy_toio(lp->base, init_words + 5, sizeof(init_words) - 10); |
| 735 | |
| 736 | /* Fill in the station address. */ |
| 737 | memcpy_toio(lp->base+SA_OFFSET, dev->dev_addr, |
| 738 | sizeof(dev->dev_addr)); |
| 739 | |
| 740 | /* The Tx-block list is written as needed. We just set up the values. */ |
| 741 | lp->tx_cmd_link = IDLELOOP + 4; |
| 742 | lp->tx_head = lp->tx_reap = TX_BUF_START; |
| 743 | |
| 744 | init_rx_bufs(dev); |
| 745 | |
| 746 | /* Start the 586 by releasing the reset line, but leave loopback. */ |
| 747 | outb(0xA0, ioaddr + MISC_CTRL); |
| 748 | |
| 749 | /* This was time consuming to track down: you need to give two channel |
| 750 | attention signals to reliably start up the i82586. */ |
| 751 | outb(0, ioaddr + SIGNAL_CA); |
| 752 | |
| 753 | { |
| 754 | int boguscnt = 50; |
| 755 | while (readw(shmem+iSCB_STATUS) == 0) |
| 756 | if (--boguscnt == 0) { |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 757 | pr_warning("%s: i82586 initialization timed out with status %04x, cmd %04x.\n", |
| 758 | dev->name, readw(shmem+iSCB_STATUS), readw(shmem+iSCB_CMD)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | break; |
| 760 | } |
| 761 | /* Issue channel-attn -- the 82586 won't start. */ |
| 762 | outb(0, ioaddr + SIGNAL_CA); |
| 763 | } |
| 764 | |
| 765 | /* Disable loopback and enable interrupts. */ |
| 766 | outb(0x84, ioaddr + MISC_CTRL); |
| 767 | if (net_debug > 4) |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 768 | pr_debug("%s: Initialized 82586, status %04x.\n", dev->name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | readw(shmem+iSCB_STATUS)); |
| 770 | return; |
| 771 | } |
| 772 | |
| 773 | static void hardware_send_packet(struct net_device *dev, void *buf, short length, short pad) |
| 774 | { |
| 775 | struct net_local *lp = netdev_priv(dev); |
| 776 | short ioaddr = dev->base_addr; |
| 777 | ushort tx_block = lp->tx_head; |
| 778 | void __iomem *write_ptr = lp->base + tx_block; |
| 779 | static char padding[ETH_ZLEN]; |
| 780 | |
| 781 | /* Set the write pointer to the Tx block, and put out the header. */ |
| 782 | writew(0x0000,write_ptr); /* Tx status */ |
| 783 | writew(CMD_INTR|CmdTx,write_ptr+=2); /* Tx command */ |
| 784 | writew(tx_block+16,write_ptr+=2); /* Next command is a NoOp. */ |
| 785 | writew(tx_block+8,write_ptr+=2); /* Data Buffer offset. */ |
| 786 | |
| 787 | /* Output the data buffer descriptor. */ |
| 788 | writew((pad + length) | 0x8000,write_ptr+=2); /* Byte count parameter. */ |
| 789 | writew(-1,write_ptr+=2); /* No next data buffer. */ |
| 790 | writew(tx_block+22+SCB_BASE,write_ptr+=2); /* Buffer follows the NoOp command. */ |
| 791 | writew(0x0000,write_ptr+=2); /* Buffer address high bits (always zero). */ |
| 792 | |
| 793 | /* Output the Loop-back NoOp command. */ |
| 794 | writew(0x0000,write_ptr+=2); /* Tx status */ |
| 795 | writew(CmdNOp,write_ptr+=2); /* Tx command */ |
| 796 | writew(tx_block+16,write_ptr+=2); /* Next is myself. */ |
| 797 | |
| 798 | /* Output the packet at the write pointer. */ |
| 799 | memcpy_toio(write_ptr+2, buf, length); |
| 800 | if (pad) |
| 801 | memcpy_toio(write_ptr+length+2, padding, pad); |
| 802 | |
| 803 | /* Set the old command link pointing to this send packet. */ |
| 804 | writew(tx_block,lp->base + lp->tx_cmd_link); |
| 805 | lp->tx_cmd_link = tx_block + 20; |
| 806 | |
| 807 | /* Set the next free tx region. */ |
| 808 | lp->tx_head = tx_block + TX_BUF_SIZE; |
| 809 | if (lp->tx_head > RX_BUF_START - TX_BUF_SIZE) |
| 810 | lp->tx_head = TX_BUF_START; |
| 811 | |
| 812 | if (net_debug > 4) { |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 813 | pr_debug("%s: 3c507 @%x send length = %d, tx_block %3x, next %3x.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | dev->name, ioaddr, length, tx_block, lp->tx_head); |
| 815 | } |
| 816 | |
| 817 | /* Grimly block further packets if there has been insufficient reaping. */ |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 818 | if (++lp->tx_pkts_in_ring < NUM_TX_BUFS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | netif_wake_queue(dev); |
| 820 | } |
| 821 | |
| 822 | static void el16_rx(struct net_device *dev) |
| 823 | { |
| 824 | struct net_local *lp = netdev_priv(dev); |
| 825 | void __iomem *shmem = lp->base; |
| 826 | ushort rx_head = lp->rx_head; |
| 827 | ushort rx_tail = lp->rx_tail; |
| 828 | ushort boguscount = 10; |
| 829 | short frame_status; |
| 830 | |
| 831 | while ((frame_status = readw(shmem+rx_head)) < 0) { /* Command complete */ |
| 832 | void __iomem *read_frame = lp->base + rx_head; |
| 833 | ushort rfd_cmd = readw(read_frame+2); |
| 834 | ushort next_rx_frame = readw(read_frame+4); |
| 835 | ushort data_buffer_addr = readw(read_frame+6); |
| 836 | void __iomem *data_frame = lp->base + data_buffer_addr; |
| 837 | ushort pkt_len = readw(data_frame); |
| 838 | |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame^] | 839 | if (rfd_cmd != 0 || data_buffer_addr != rx_head + 22 || |
| 840 | (pkt_len & 0xC000) != 0xC000) { |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 841 | pr_err("%s: Rx frame at %#x corrupted, " |
Jeff Garzik | cba0516 | 2007-11-23 21:50:34 -0500 | [diff] [blame] | 842 | "status %04x cmd %04x next %04x " |
| 843 | "data-buf @%04x %04x.\n", |
| 844 | dev->name, rx_head, frame_status, rfd_cmd, |
| 845 | next_rx_frame, data_buffer_addr, pkt_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | } else if ((frame_status & 0x2000) == 0) { |
| 847 | /* Frame Rxed, but with error. */ |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 848 | dev->stats.rx_errors++; |
| 849 | if (frame_status & 0x0800) dev->stats.rx_crc_errors++; |
| 850 | if (frame_status & 0x0400) dev->stats.rx_frame_errors++; |
| 851 | if (frame_status & 0x0200) dev->stats.rx_fifo_errors++; |
| 852 | if (frame_status & 0x0100) dev->stats.rx_over_errors++; |
| 853 | if (frame_status & 0x0080) dev->stats.rx_length_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | } else { |
| 855 | /* Malloc up new buffer. */ |
| 856 | struct sk_buff *skb; |
| 857 | |
| 858 | pkt_len &= 0x3fff; |
| 859 | skb = dev_alloc_skb(pkt_len+2); |
| 860 | if (skb == NULL) { |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 861 | pr_err("%s: Memory squeeze, dropping packet.\n", |
Jeff Garzik | cba0516 | 2007-11-23 21:50:34 -0500 | [diff] [blame] | 862 | dev->name); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 863 | dev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | break; |
| 865 | } |
| 866 | |
| 867 | skb_reserve(skb,2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | |
| 869 | /* 'skb->data' points to the start of sk_buff data area. */ |
| 870 | memcpy_fromio(skb_put(skb,pkt_len), data_frame + 10, pkt_len); |
| 871 | |
| 872 | skb->protocol=eth_type_trans(skb,dev); |
| 873 | netif_rx(skb); |
Jeff Garzik | 09f75cd | 2007-10-03 17:41:50 -0700 | [diff] [blame] | 874 | dev->stats.rx_packets++; |
| 875 | dev->stats.rx_bytes += pkt_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | } |
| 877 | |
| 878 | /* Clear the status word and set End-of-List on the rx frame. */ |
| 879 | writew(0,read_frame); |
| 880 | writew(0xC000,read_frame+2); |
| 881 | /* Clear the end-of-list on the prev. RFD. */ |
| 882 | writew(0x0000,lp->base + rx_tail + 2); |
| 883 | |
| 884 | rx_tail = rx_head; |
| 885 | rx_head = next_rx_frame; |
| 886 | if (--boguscount == 0) |
| 887 | break; |
| 888 | } |
| 889 | |
| 890 | lp->rx_head = rx_head; |
| 891 | lp->rx_tail = rx_tail; |
| 892 | } |
| 893 | |
| 894 | static void netdev_get_drvinfo(struct net_device *dev, |
| 895 | struct ethtool_drvinfo *info) |
| 896 | { |
| 897 | strcpy(info->driver, DRV_NAME); |
| 898 | strcpy(info->version, DRV_VERSION); |
| 899 | sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr); |
| 900 | } |
| 901 | |
| 902 | static u32 netdev_get_msglevel(struct net_device *dev) |
| 903 | { |
| 904 | return debug; |
| 905 | } |
| 906 | |
| 907 | static void netdev_set_msglevel(struct net_device *dev, u32 level) |
| 908 | { |
| 909 | debug = level; |
| 910 | } |
| 911 | |
Jeff Garzik | 7282d49 | 2006-09-13 14:30:00 -0400 | [diff] [blame] | 912 | static const struct ethtool_ops netdev_ethtool_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | .get_drvinfo = netdev_get_drvinfo, |
| 914 | .get_msglevel = netdev_get_msglevel, |
| 915 | .set_msglevel = netdev_set_msglevel, |
| 916 | }; |
| 917 | |
| 918 | #ifdef MODULE |
| 919 | static struct net_device *dev_3c507; |
| 920 | module_param(io, int, 0); |
| 921 | module_param(irq, int, 0); |
| 922 | MODULE_PARM_DESC(io, "EtherLink16 I/O base address"); |
| 923 | MODULE_PARM_DESC(irq, "(ignored)"); |
| 924 | |
Randy Dunlap | 96e672c | 2006-06-10 13:33:48 -0700 | [diff] [blame] | 925 | int __init init_module(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | { |
| 927 | if (io == 0) |
Alexander Beregalov | 646cdb3 | 2009-05-26 12:35:25 +0000 | [diff] [blame] | 928 | pr_notice("3c507: You should not use auto-probing with insmod!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | dev_3c507 = el16_probe(-1); |
| 930 | return IS_ERR(dev_3c507) ? PTR_ERR(dev_3c507) : 0; |
| 931 | } |
| 932 | |
Al Viro | afc8eb4 | 2006-06-14 18:50:53 -0400 | [diff] [blame] | 933 | void __exit |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | cleanup_module(void) |
| 935 | { |
| 936 | struct net_device *dev = dev_3c507; |
| 937 | unregister_netdev(dev); |
| 938 | free_irq(dev->irq, dev); |
| 939 | iounmap(((struct net_local *)netdev_priv(dev))->base); |
| 940 | release_region(dev->base_addr, EL16_IO_EXTENT); |
| 941 | free_netdev(dev); |
| 942 | } |
| 943 | #endif /* MODULE */ |
| 944 | MODULE_LICENSE("GPL"); |