Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* mac89x0.c: A Crystal Semiconductor CS89[02]0 driver for linux. */ |
| 2 | /* |
| 3 | Written 1996 by Russell Nelson, with reference to skeleton.c |
| 4 | written 1993-1994 by Donald Becker. |
| 5 | |
| 6 | This software may be used and distributed according to the terms |
| 7 | of the GNU General Public License, incorporated herein by reference. |
| 8 | |
| 9 | The author may be reached at nelson@crynwr.com, Crynwr |
| 10 | Software, 11 Grant St., Potsdam, NY 13676 |
| 11 | |
| 12 | Changelog: |
| 13 | |
| 14 | Mike Cruse : mcruse@cti-ltd.com |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 15 | : Changes for Linux 2.0 compatibility. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | : Added dev_id parameter in net_interrupt(), |
| 17 | : request_irq() and free_irq(). Just NULL for now. |
| 18 | |
| 19 | Mike Cruse : Added MOD_INC_USE_COUNT and MOD_DEC_USE_COUNT macros |
| 20 | : in net_open() and net_close() so kerneld would know |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 21 | : that the module is in use and wouldn't eject the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | : driver prematurely. |
| 23 | |
| 24 | Mike Cruse : Rewrote init_module() and cleanup_module using 8390.c |
| 25 | : as an example. Disabled autoprobing in init_module(), |
| 26 | : not a good thing to do to other devices while Linux |
| 27 | : is running from all accounts. |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | Alan Cox : Removed 1.2 support, added 2.1 extra counters. |
| 30 | |
| 31 | David Huggins-Daines <dhd@debian.org> |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | Split this off into mac89x0.c, and gutted it of all parts which are |
| 34 | not relevant to the existing CS8900 cards on the Macintosh |
| 35 | (i.e. basically the Daynaport CS and LC cards). To be precise: |
| 36 | |
| 37 | * Removed all the media-detection stuff, because these cards are |
| 38 | TP-only. |
| 39 | |
| 40 | * Lobotomized the ISA interrupt bogosity, because these cards use |
| 41 | a hardwired NuBus interrupt and a magic ISAIRQ value in the card. |
| 42 | |
| 43 | * Basically eliminated everything not relevant to getting the |
| 44 | cards minimally functioning on the Macintosh. |
| 45 | |
| 46 | I might add that these cards are badly designed even from the Mac |
| 47 | standpoint, in that Dayna, in their infinite wisdom, used NuBus slot |
| 48 | I/O space and NuBus interrupts for these cards, but neglected to |
| 49 | provide anything even remotely resembling a NuBus ROM. Therefore we |
| 50 | have to probe for them in a brain-damaged ISA-like fashion. |
| 51 | |
| 52 | Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 11/01/2001 |
| 53 | check kmalloc and release the allocated memory on failure in |
| 54 | mac89x0_probe and in init_module |
| 55 | use local_irq_{save,restore}(flags) in net_get_stat, not just |
| 56 | local_irq_{dis,en}able() |
| 57 | */ |
| 58 | |
| 59 | static char *version = |
| 60 | "cs89x0.c:v1.02 11/26/96 Russell Nelson <nelson@crynwr.com>\n"; |
| 61 | |
| 62 | /* ======================= configure the driver here ======================= */ |
| 63 | |
| 64 | /* use 0 for production, 1 for verification, >2 for debug */ |
| 65 | #ifndef NET_DEBUG |
| 66 | #define NET_DEBUG 0 |
| 67 | #endif |
| 68 | |
| 69 | /* ======================= end of configuration ======================= */ |
| 70 | |
| 71 | |
| 72 | /* Always include 'config.h' first in case the user wants to turn on |
| 73 | or override something. */ |
| 74 | #include <linux/module.h> |
| 75 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | /* |
| 77 | Sources: |
| 78 | |
| 79 | Crynwr packet driver epktisa. |
| 80 | |
| 81 | Crystal Semiconductor data sheets. |
| 82 | |
| 83 | */ |
| 84 | |
| 85 | #include <linux/kernel.h> |
| 86 | #include <linux/types.h> |
| 87 | #include <linux/fcntl.h> |
| 88 | #include <linux/interrupt.h> |
| 89 | #include <linux/ioport.h> |
| 90 | #include <linux/in.h> |
| 91 | #include <linux/slab.h> |
| 92 | #include <linux/string.h> |
| 93 | #include <linux/nubus.h> |
| 94 | #include <linux/errno.h> |
| 95 | #include <linux/init.h> |
| 96 | #include <linux/netdevice.h> |
| 97 | #include <linux/etherdevice.h> |
| 98 | #include <linux/skbuff.h> |
| 99 | #include <linux/delay.h> |
Jiri Slaby | 1977f03 | 2007-10-18 23:40:25 -0700 | [diff] [blame] | 100 | #include <linux/bitops.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
| 102 | #include <asm/system.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | #include <asm/io.h> |
| 104 | #include <asm/hwtest.h> |
| 105 | #include <asm/macints.h> |
| 106 | |
| 107 | #include "cs89x0.h" |
| 108 | |
| 109 | static unsigned int net_debug = NET_DEBUG; |
| 110 | |
| 111 | /* Information that need to be kept for each board. */ |
| 112 | struct net_local { |
| 113 | struct net_device_stats stats; |
| 114 | int chip_type; /* one of: CS8900, CS8920, CS8920M */ |
| 115 | char chip_revision; /* revision letter of the chip ('A'...) */ |
| 116 | int send_cmd; /* the propercommand used to send a packet. */ |
| 117 | int rx_mode; |
| 118 | int curr_rx_cfg; |
| 119 | int send_underrun; /* keep track of how many underruns in a row we get */ |
| 120 | struct sk_buff *skb; |
| 121 | }; |
| 122 | |
| 123 | /* Index to functions, as function prototypes. */ |
| 124 | |
| 125 | #if 0 |
| 126 | extern void reset_chip(struct net_device *dev); |
| 127 | #endif |
| 128 | static int net_open(struct net_device *dev); |
Matthias Urlichs | 39ad2cb | 2007-05-01 22:32:41 +0200 | [diff] [blame] | 129 | static int net_send_packet(struct sk_buff *skb, struct net_device *dev); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 130 | static irqreturn_t net_interrupt(int irq, void *dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | static void set_multicast_list(struct net_device *dev); |
| 132 | static void net_rx(struct net_device *dev); |
| 133 | static int net_close(struct net_device *dev); |
| 134 | static struct net_device_stats *net_get_stats(struct net_device *dev); |
| 135 | static int set_mac_address(struct net_device *dev, void *addr); |
| 136 | |
| 137 | |
| 138 | /* Example routines you must write ;->. */ |
| 139 | #define tx_done(dev) 1 |
| 140 | |
| 141 | /* For reading/writing registers ISA-style */ |
| 142 | static inline int |
| 143 | readreg_io(struct net_device *dev, int portno) |
| 144 | { |
| 145 | nubus_writew(swab16(portno), dev->base_addr + ADD_PORT); |
| 146 | return swab16(nubus_readw(dev->base_addr + DATA_PORT)); |
| 147 | } |
| 148 | |
| 149 | static inline void |
| 150 | writereg_io(struct net_device *dev, int portno, int value) |
| 151 | { |
| 152 | nubus_writew(swab16(portno), dev->base_addr + ADD_PORT); |
| 153 | nubus_writew(swab16(value), dev->base_addr + DATA_PORT); |
| 154 | } |
| 155 | |
| 156 | /* These are for reading/writing registers in shared memory */ |
| 157 | static inline int |
| 158 | readreg(struct net_device *dev, int portno) |
| 159 | { |
| 160 | return swab16(nubus_readw(dev->mem_start + portno)); |
| 161 | } |
| 162 | |
| 163 | static inline void |
| 164 | writereg(struct net_device *dev, int portno, int value) |
| 165 | { |
| 166 | nubus_writew(swab16(value), dev->mem_start + portno); |
| 167 | } |
| 168 | |
Alexander Beregalov | d0174ae | 2009-04-11 07:43:11 +0000 | [diff] [blame] | 169 | static const struct net_device_ops mac89x0_netdev_ops = { |
| 170 | .ndo_open = net_open, |
| 171 | .ndo_stop = net_close, |
| 172 | .ndo_start_xmit = net_send_packet, |
| 173 | .ndo_get_stats = net_get_stats, |
| 174 | .ndo_set_multicast_list = set_multicast_list, |
| 175 | .ndo_set_mac_address = set_mac_address, |
| 176 | .ndo_validate_addr = eth_validate_addr, |
| 177 | .ndo_change_mtu = eth_change_mtu, |
| 178 | }; |
| 179 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | /* Probe for the CS8900 card in slot E. We won't bother looking |
| 181 | anywhere else until we have a really good reason to do so. */ |
| 182 | struct net_device * __init mac89x0_probe(int unit) |
| 183 | { |
| 184 | struct net_device *dev; |
| 185 | static int once_is_enough; |
| 186 | struct net_local *lp; |
| 187 | static unsigned version_printed; |
| 188 | int i, slot; |
| 189 | unsigned rev_type = 0; |
| 190 | unsigned long ioaddr; |
| 191 | unsigned short sig; |
| 192 | int err = -ENODEV; |
| 193 | |
Geert Uytterhoeven | 0f73448 | 2008-05-18 20:47:16 +0200 | [diff] [blame] | 194 | if (!MACH_IS_MAC) |
| 195 | return ERR_PTR(-ENODEV); |
| 196 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | dev = alloc_etherdev(sizeof(struct net_local)); |
| 198 | if (!dev) |
| 199 | return ERR_PTR(-ENOMEM); |
| 200 | |
| 201 | if (unit >= 0) { |
| 202 | sprintf(dev->name, "eth%d", unit); |
| 203 | netdev_boot_setup_check(dev); |
| 204 | } |
| 205 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | if (once_is_enough) |
| 207 | goto out; |
| 208 | once_is_enough = 1; |
| 209 | |
| 210 | /* We might have to parameterize this later */ |
| 211 | slot = 0xE; |
| 212 | /* Get out now if there's a real NuBus card in slot E */ |
| 213 | if (nubus_find_slot(slot, NULL) != NULL) |
| 214 | goto out; |
| 215 | |
| 216 | /* The pseudo-ISA bits always live at offset 0x300 (gee, |
| 217 | wonder why...) */ |
| 218 | ioaddr = (unsigned long) |
| 219 | nubus_slot_addr(slot) | (((slot&0xf) << 20) + DEFAULTIOBASE); |
| 220 | { |
| 221 | unsigned long flags; |
| 222 | int card_present; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 223 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | local_irq_save(flags); |
Joe Perches | 8e95a20 | 2009-12-03 07:58:21 +0000 | [diff] [blame] | 225 | card_present = (hwreg_present((void*) ioaddr+4) && |
| 226 | hwreg_present((void*) ioaddr + DATA_PORT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | local_irq_restore(flags); |
| 228 | |
| 229 | if (!card_present) |
| 230 | goto out; |
| 231 | } |
| 232 | |
| 233 | nubus_writew(0, ioaddr + ADD_PORT); |
| 234 | sig = nubus_readw(ioaddr + DATA_PORT); |
| 235 | if (sig != swab16(CHIP_EISA_ID_SIG)) |
| 236 | goto out; |
| 237 | |
| 238 | /* Initialize the net_device structure. */ |
| 239 | lp = netdev_priv(dev); |
| 240 | |
| 241 | /* Fill in the 'dev' fields. */ |
| 242 | dev->base_addr = ioaddr; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 243 | dev->mem_start = (unsigned long) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | nubus_slot_addr(slot) | (((slot&0xf) << 20) + MMIOBASE); |
| 245 | dev->mem_end = dev->mem_start + 0x1000; |
| 246 | |
| 247 | /* Turn on shared memory */ |
| 248 | writereg_io(dev, PP_BusCTL, MEMORY_ON); |
| 249 | |
| 250 | /* get the chip type */ |
| 251 | rev_type = readreg(dev, PRODUCT_ID_ADD); |
| 252 | lp->chip_type = rev_type &~ REVISON_BITS; |
| 253 | lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A'; |
| 254 | |
| 255 | /* Check the chip type and revision in order to set the correct send command |
| 256 | CS8920 revision C and CS8900 revision F can use the faster send. */ |
| 257 | lp->send_cmd = TX_AFTER_381; |
| 258 | if (lp->chip_type == CS8900 && lp->chip_revision >= 'F') |
| 259 | lp->send_cmd = TX_NOW; |
| 260 | if (lp->chip_type != CS8900 && lp->chip_revision >= 'C') |
| 261 | lp->send_cmd = TX_NOW; |
| 262 | |
| 263 | if (net_debug && version_printed++ == 0) |
| 264 | printk(version); |
| 265 | |
| 266 | printk(KERN_INFO "%s: cs89%c0%s rev %c found at %#8lx", |
| 267 | dev->name, |
| 268 | lp->chip_type==CS8900?'0':'2', |
| 269 | lp->chip_type==CS8920M?"M":"", |
| 270 | lp->chip_revision, |
| 271 | dev->base_addr); |
| 272 | |
| 273 | /* Try to read the MAC address */ |
| 274 | if ((readreg(dev, PP_SelfST) & (EEPROM_PRESENT | EEPROM_OK)) == 0) { |
| 275 | printk("\nmac89x0: No EEPROM, giving up now.\n"); |
| 276 | goto out1; |
| 277 | } else { |
| 278 | for (i = 0; i < ETH_ALEN; i += 2) { |
| 279 | /* Big-endian (why??!) */ |
| 280 | unsigned short s = readreg(dev, PP_IA + i); |
| 281 | dev->dev_addr[i] = s >> 8; |
| 282 | dev->dev_addr[i+1] = s & 0xff; |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | dev->irq = SLOT2IRQ(slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 288 | /* print the IRQ and ethernet address. */ |
| 289 | |
Johannes Berg | e174961 | 2008-10-27 15:59:26 -0700 | [diff] [blame] | 290 | printk(" IRQ %d ADDR %pM\n", dev->irq, dev->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
Alexander Beregalov | d0174ae | 2009-04-11 07:43:11 +0000 | [diff] [blame] | 292 | dev->netdev_ops = &mac89x0_netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
| 294 | err = register_netdev(dev); |
| 295 | if (err) |
| 296 | goto out1; |
Al Viro | 79ea13c | 2008-01-24 02:06:46 -0800 | [diff] [blame] | 297 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | out1: |
| 299 | nubus_writew(0, dev->base_addr + ADD_PORT); |
| 300 | out: |
| 301 | free_netdev(dev); |
| 302 | return ERR_PTR(err); |
| 303 | } |
| 304 | |
| 305 | #if 0 |
| 306 | /* This is useful for something, but I don't know what yet. */ |
| 307 | void __init reset_chip(struct net_device *dev) |
| 308 | { |
| 309 | int reset_start_time; |
| 310 | |
| 311 | writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET); |
| 312 | |
| 313 | /* wait 30 ms */ |
| 314 | msleep_interruptible(30); |
| 315 | |
| 316 | /* Wait until the chip is reset */ |
| 317 | reset_start_time = jiffies; |
| 318 | while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2) |
| 319 | ; |
| 320 | } |
| 321 | #endif |
| 322 | |
| 323 | /* Open/initialize the board. This is called (in the current kernel) |
| 324 | sometime after booting when the 'ifconfig' program is run. |
| 325 | |
| 326 | This routine should set everything up anew at each open, even |
| 327 | registers that "should" only need to be set once at boot, so that |
| 328 | there is non-reboot way to recover if something goes wrong. |
| 329 | */ |
| 330 | static int |
| 331 | net_open(struct net_device *dev) |
| 332 | { |
| 333 | struct net_local *lp = netdev_priv(dev); |
| 334 | int i; |
| 335 | |
| 336 | /* Disable the interrupt for now */ |
| 337 | writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) & ~ENABLE_IRQ); |
| 338 | |
| 339 | /* Grab the interrupt */ |
Joe Perches | a0607fd | 2009-11-18 23:29:17 -0800 | [diff] [blame] | 340 | if (request_irq(dev->irq, net_interrupt, 0, "cs89x0", dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | return -EAGAIN; |
| 342 | |
| 343 | /* Set up the IRQ - Apparently magic */ |
| 344 | if (lp->chip_type == CS8900) |
| 345 | writereg(dev, PP_CS8900_ISAINT, 0); |
| 346 | else |
| 347 | writereg(dev, PP_CS8920_ISAINT, 0); |
| 348 | |
| 349 | /* set the Ethernet address */ |
| 350 | for (i=0; i < ETH_ALEN/2; i++) |
| 351 | writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8)); |
| 352 | |
| 353 | /* Turn on both receive and transmit operations */ |
| 354 | writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON); |
| 355 | |
| 356 | /* Receive only error free packets addressed to this card */ |
| 357 | lp->rx_mode = 0; |
| 358 | writereg(dev, PP_RxCTL, DEF_RX_ACCEPT); |
| 359 | |
| 360 | lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL; |
| 361 | |
| 362 | writereg(dev, PP_RxCFG, lp->curr_rx_cfg); |
| 363 | |
| 364 | writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL | |
| 365 | TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL); |
| 366 | |
| 367 | writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL | |
| 368 | TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL); |
| 369 | |
| 370 | /* now that we've got our act together, enable everything */ |
| 371 | writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ); |
| 372 | netif_start_queue(dev); |
| 373 | return 0; |
| 374 | } |
| 375 | |
| 376 | static int |
| 377 | net_send_packet(struct sk_buff *skb, struct net_device *dev) |
| 378 | { |
Matthias Urlichs | 39ad2cb | 2007-05-01 22:32:41 +0200 | [diff] [blame] | 379 | struct net_local *lp = netdev_priv(dev); |
| 380 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
Matthias Urlichs | 39ad2cb | 2007-05-01 22:32:41 +0200 | [diff] [blame] | 382 | if (net_debug > 3) |
| 383 | printk("%s: sent %d byte packet of type %x\n", |
| 384 | dev->name, skb->len, |
| 385 | (skb->data[ETH_ALEN+ETH_ALEN] << 8) |
| 386 | | skb->data[ETH_ALEN+ETH_ALEN+1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | |
Matthias Urlichs | 39ad2cb | 2007-05-01 22:32:41 +0200 | [diff] [blame] | 388 | /* keep the upload from being interrupted, since we |
| 389 | ask the chip to start transmitting before the |
| 390 | whole packet has been completely uploaded. */ |
| 391 | local_irq_save(flags); |
| 392 | netif_stop_queue(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
Matthias Urlichs | 39ad2cb | 2007-05-01 22:32:41 +0200 | [diff] [blame] | 394 | /* initiate a transmit sequence */ |
| 395 | writereg(dev, PP_TxCMD, lp->send_cmd); |
| 396 | writereg(dev, PP_TxLength, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | |
Matthias Urlichs | 39ad2cb | 2007-05-01 22:32:41 +0200 | [diff] [blame] | 398 | /* Test to see if the chip has allocated memory for the packet */ |
| 399 | if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) { |
| 400 | /* Gasp! It hasn't. But that shouldn't happen since |
| 401 | we're waiting for TxOk, so return 1 and requeue this packet. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | local_irq_restore(flags); |
Patrick McHardy | 5b54814 | 2009-06-12 06:22:29 +0000 | [diff] [blame] | 403 | return NETDEV_TX_BUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | } |
Matthias Urlichs | 39ad2cb | 2007-05-01 22:32:41 +0200 | [diff] [blame] | 405 | |
| 406 | /* Write the contents of the packet */ |
| 407 | skb_copy_from_linear_data(skb, (void *)(dev->mem_start + PP_TxFrame), |
| 408 | skb->len+1); |
| 409 | |
| 410 | local_irq_restore(flags); |
| 411 | dev->trans_start = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | dev_kfree_skb (skb); |
| 413 | |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 414 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | } |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 416 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | /* The typical workload of the driver: |
| 418 | Handle the network interface interrupts. */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 419 | static irqreturn_t net_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | { |
| 421 | struct net_device *dev = dev_id; |
| 422 | struct net_local *lp; |
| 423 | int ioaddr, status; |
| 424 | |
| 425 | if (dev == NULL) { |
| 426 | printk ("net_interrupt(): irq %d for unknown device.\n", irq); |
| 427 | return IRQ_NONE; |
| 428 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
| 430 | ioaddr = dev->base_addr; |
| 431 | lp = netdev_priv(dev); |
| 432 | |
| 433 | /* we MUST read all the events out of the ISQ, otherwise we'll never |
| 434 | get interrupted again. As a consequence, we can't have any limit |
| 435 | on the number of times we loop in the interrupt handler. The |
| 436 | hardware guarantees that eventually we'll run out of events. Of |
| 437 | course, if you're on a slow machine, and packets are arriving |
| 438 | faster than you can read them off, you're screwed. Hasta la |
| 439 | vista, baby! */ |
| 440 | while ((status = swab16(nubus_readw(dev->base_addr + ISQ_PORT)))) { |
| 441 | if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status); |
| 442 | switch(status & ISQ_EVENT_MASK) { |
| 443 | case ISQ_RECEIVER_EVENT: |
| 444 | /* Got a packet(s). */ |
| 445 | net_rx(dev); |
| 446 | break; |
| 447 | case ISQ_TRANSMITTER_EVENT: |
| 448 | lp->stats.tx_packets++; |
Matthias Urlichs | 39ad2cb | 2007-05-01 22:32:41 +0200 | [diff] [blame] | 449 | netif_wake_queue(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | if ((status & TX_OK) == 0) lp->stats.tx_errors++; |
| 451 | if (status & TX_LOST_CRS) lp->stats.tx_carrier_errors++; |
| 452 | if (status & TX_SQE_ERROR) lp->stats.tx_heartbeat_errors++; |
| 453 | if (status & TX_LATE_COL) lp->stats.tx_window_errors++; |
| 454 | if (status & TX_16_COL) lp->stats.tx_aborted_errors++; |
| 455 | break; |
| 456 | case ISQ_BUFFER_EVENT: |
| 457 | if (status & READY_FOR_TX) { |
| 458 | /* we tried to transmit a packet earlier, |
| 459 | but inexplicably ran out of buffers. |
| 460 | That shouldn't happen since we only ever |
| 461 | load one packet. Shrug. Do the right |
| 462 | thing anyway. */ |
Matthias Urlichs | 39ad2cb | 2007-05-01 22:32:41 +0200 | [diff] [blame] | 463 | netif_wake_queue(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | } |
| 465 | if (status & TX_UNDERRUN) { |
| 466 | if (net_debug > 0) printk("%s: transmit underrun\n", dev->name); |
| 467 | lp->send_underrun++; |
| 468 | if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381; |
| 469 | else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL; |
| 470 | } |
| 471 | break; |
| 472 | case ISQ_RX_MISS_EVENT: |
| 473 | lp->stats.rx_missed_errors += (status >>6); |
| 474 | break; |
| 475 | case ISQ_TX_COL_EVENT: |
| 476 | lp->stats.collisions += (status >>6); |
| 477 | break; |
| 478 | } |
| 479 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | return IRQ_HANDLED; |
| 481 | } |
| 482 | |
| 483 | /* We have a good packet(s), get it/them out of the buffers. */ |
| 484 | static void |
| 485 | net_rx(struct net_device *dev) |
| 486 | { |
| 487 | struct net_local *lp = netdev_priv(dev); |
| 488 | struct sk_buff *skb; |
| 489 | int status, length; |
| 490 | |
| 491 | status = readreg(dev, PP_RxStatus); |
| 492 | if ((status & RX_OK) == 0) { |
| 493 | lp->stats.rx_errors++; |
| 494 | if (status & RX_RUNT) lp->stats.rx_length_errors++; |
| 495 | if (status & RX_EXTRA_DATA) lp->stats.rx_length_errors++; |
| 496 | if (status & RX_CRC_ERROR) if (!(status & (RX_EXTRA_DATA|RX_RUNT))) |
| 497 | /* per str 172 */ |
| 498 | lp->stats.rx_crc_errors++; |
| 499 | if (status & RX_DRIBBLE) lp->stats.rx_frame_errors++; |
| 500 | return; |
| 501 | } |
| 502 | |
| 503 | length = readreg(dev, PP_RxLength); |
| 504 | /* Malloc up new buffer. */ |
| 505 | skb = alloc_skb(length, GFP_ATOMIC); |
| 506 | if (skb == NULL) { |
| 507 | printk("%s: Memory squeeze, dropping packet.\n", dev->name); |
| 508 | lp->stats.rx_dropped++; |
| 509 | return; |
| 510 | } |
| 511 | skb_put(skb, length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | |
Matthias Urlichs | 39ad2cb | 2007-05-01 22:32:41 +0200 | [diff] [blame] | 513 | skb_copy_to_linear_data(skb, (void *)(dev->mem_start + PP_RxFrame), |
| 514 | length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | |
| 516 | if (net_debug > 3)printk("%s: received %d byte packet of type %x\n", |
| 517 | dev->name, length, |
| 518 | (skb->data[ETH_ALEN+ETH_ALEN] << 8) |
| 519 | | skb->data[ETH_ALEN+ETH_ALEN+1]); |
| 520 | |
| 521 | skb->protocol=eth_type_trans(skb,dev); |
| 522 | netif_rx(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | lp->stats.rx_packets++; |
| 524 | lp->stats.rx_bytes += length; |
| 525 | } |
| 526 | |
| 527 | /* The inverse routine to net_open(). */ |
| 528 | static int |
| 529 | net_close(struct net_device *dev) |
| 530 | { |
| 531 | |
| 532 | writereg(dev, PP_RxCFG, 0); |
| 533 | writereg(dev, PP_TxCFG, 0); |
| 534 | writereg(dev, PP_BufCFG, 0); |
| 535 | writereg(dev, PP_BusCTL, 0); |
| 536 | |
| 537 | netif_stop_queue(dev); |
| 538 | |
| 539 | free_irq(dev->irq, dev); |
| 540 | |
| 541 | /* Update the statistics here. */ |
| 542 | |
| 543 | return 0; |
| 544 | |
| 545 | } |
| 546 | |
| 547 | /* Get the current statistics. This may be called with the card open or |
| 548 | closed. */ |
| 549 | static struct net_device_stats * |
| 550 | net_get_stats(struct net_device *dev) |
| 551 | { |
| 552 | struct net_local *lp = netdev_priv(dev); |
| 553 | unsigned long flags; |
| 554 | |
| 555 | local_irq_save(flags); |
| 556 | /* Update the statistics from the device registers. */ |
| 557 | lp->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6); |
| 558 | lp->stats.collisions += (readreg(dev, PP_TxCol) >> 6); |
| 559 | local_irq_restore(flags); |
| 560 | |
| 561 | return &lp->stats; |
| 562 | } |
| 563 | |
| 564 | static void set_multicast_list(struct net_device *dev) |
| 565 | { |
| 566 | struct net_local *lp = netdev_priv(dev); |
| 567 | |
| 568 | if(dev->flags&IFF_PROMISC) |
| 569 | { |
| 570 | lp->rx_mode = RX_ALL_ACCEPT; |
| 571 | } |
| 572 | else if((dev->flags&IFF_ALLMULTI)||dev->mc_list) |
| 573 | { |
| 574 | /* The multicast-accept list is initialized to accept-all, and we |
| 575 | rely on higher-level filtering for now. */ |
| 576 | lp->rx_mode = RX_MULTCAST_ACCEPT; |
Jeff Garzik | 6aa20a2 | 2006-09-13 13:24:59 -0400 | [diff] [blame] | 577 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | else |
| 579 | lp->rx_mode = 0; |
| 580 | |
| 581 | writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode); |
| 582 | |
| 583 | /* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */ |
| 584 | writereg(dev, PP_RxCFG, lp->curr_rx_cfg | |
| 585 | (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0)); |
| 586 | } |
| 587 | |
| 588 | |
| 589 | static int set_mac_address(struct net_device *dev, void *addr) |
| 590 | { |
| 591 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | printk("%s: Setting MAC address to ", dev->name); |
| 593 | for (i = 0; i < 6; i++) |
| 594 | printk(" %2.2x", dev->dev_addr[i] = ((unsigned char *)addr)[i]); |
| 595 | printk(".\n"); |
| 596 | /* set the Ethernet address */ |
| 597 | for (i=0; i < ETH_ALEN/2; i++) |
| 598 | writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8)); |
| 599 | |
| 600 | return 0; |
| 601 | } |
| 602 | |
| 603 | #ifdef MODULE |
| 604 | |
| 605 | static struct net_device *dev_cs89x0; |
| 606 | static int debug; |
| 607 | |
Rusty Russell | 8d3b33f | 2006-03-25 03:07:05 -0800 | [diff] [blame] | 608 | module_param(debug, int, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | MODULE_PARM_DESC(debug, "CS89[02]0 debug level (0-5)"); |
| 610 | MODULE_LICENSE("GPL"); |
| 611 | |
Al Viro | 446df4c | 2007-07-20 04:33:48 +0100 | [diff] [blame] | 612 | int __init |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | init_module(void) |
| 614 | { |
| 615 | net_debug = debug; |
| 616 | dev_cs89x0 = mac89x0_probe(-1); |
| 617 | if (IS_ERR(dev_cs89x0)) { |
| 618 | printk(KERN_WARNING "mac89x0.c: No card found\n"); |
| 619 | return PTR_ERR(dev_cs89x0); |
| 620 | } |
| 621 | return 0; |
| 622 | } |
| 623 | |
| 624 | void |
| 625 | cleanup_module(void) |
| 626 | { |
| 627 | unregister_netdev(dev_cs89x0); |
| 628 | nubus_writew(0, dev_cs89x0->base_addr + ADD_PORT); |
| 629 | free_netdev(dev_cs89x0); |
| 630 | } |
| 631 | #endif /* MODULE */ |