drivers/atm/solos-pci.c

   1 /*
   2  * Driver for the Solos PCI ADSL2+ card, designed to support Linux by
   3  *  Traverse Technologies -- http://www.traverse.com.au/
   4  *  Xrio Limited          -- http://www.xrio.com/
   5  *
   6  *
   7  * Copyright © 2008 Traverse Technologies
   8  * Copyright © 2008 Intel Corporation
   9  *
  10  * Authors: Nathan Williams <nathan@traverse.com.au>
  11  *          David Woodhouse <dwmw2@infradead.org>
  12  *          Treker Chen <treker@xrio.com>
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License
  16  * version 2, as published by the Free Software Foundation.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  */
  23
  24 #define DEBUG
  25 #define VERBOSE_DEBUG
  26
  27 #include <linux/interrupt.h>
  28 #include <linux/module.h>
  29 #include <linux/kernel.h>
  30 #include <linux/errno.h>
  31 #include <linux/ioport.h>
  32 #include <linux/types.h>
  33 #include <linux/pci.h>
  34 #include <linux/atm.h>
  35 #include <linux/atmdev.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/sysfs.h>
  38 #include <linux/device.h>
  39 #include <linux/kobject.h>
  40 #include <linux/firmware.h>
  41 #include <linux/ctype.h>
  42 #include <linux/swab.h>
  43
  44 #define VERSION "0.07"
  45 #define PTAG "solos-pci"
  46
  47 #define CONFIG_RAM_SIZE 128
  48 #define FLAGS_ADDR      0x7C
  49 #define IRQ_EN_ADDR     0x78
  50 #define FPGA_VER        0x74
  51 #define IRQ_CLEAR       0x70
  52 #define WRITE_FLASH     0x6C
  53 #define PORTS           0x68
  54 #define FLASH_BLOCK     0x64
  55 #define FLASH_BUSY      0x60
  56 #define FPGA_MODE       0x5C
  57 #define FLASH_MODE      0x58
  58 #define TX_DMA_ADDR(port)       (0x40 + (4 * (port)))
  59 #define RX_DMA_ADDR(port)       (0x30 + (4 * (port)))
  60
  61 #define DATA_RAM_SIZE   32768
  62 #define BUF_SIZE        2048
  63 #define OLD_BUF_SIZE    4096 /* For FPGA versions <= 2*/
  64 #define FPGA_PAGE       528 /* FPGA flash page size*/
  65 #define SOLOS_PAGE      512 /* Solos flash page size*/
  66 #define FPGA_BLOCK      (FPGA_PAGE * 8) /* FPGA flash block size*/
  67 #define SOLOS_BLOCK     (SOLOS_PAGE * 8) /* Solos flash block size*/
  68
  69 #define RX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2)
  70 #define TX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2 + (card->buffer_size))
  71 #define FLASH_BUF ((card->buffers) + 4*(card->buffer_size)*2)
  72
  73 #define RX_DMA_SIZE     2048
  74
  75 #define FPGA_VERSION(a,b) (((a) << 8) + (b))
  76 #define LEGACY_BUFFERS  2
  77 #define DMA_SUPPORTED   4
  78
  79 static int reset = 0;
  80 static int atmdebug = 0;
  81 static int firmware_upgrade = 0;
  82 static int fpga_upgrade = 0;
  83 static int db_firmware_upgrade = 0;
  84 static int db_fpga_upgrade = 0;
  85
  86 struct pkt_hdr {
  87         __le16 size;
  88         __le16 vpi;
  89         __le16 vci;
  90         __le16 type;
  91 };
  92
  93 struct solos_skb_cb {
  94         struct atm_vcc *vcc;
  95         uint32_t dma_addr;
  96 };
  97
  98
  99 #define SKB_CB(skb)             ((struct solos_skb_cb *)skb->cb)
 100
 101 #define PKT_DATA        0
 102 #define PKT_COMMAND     1
 103 #define PKT_POPEN       3
 104 #define PKT_PCLOSE      4
 105 #define PKT_STATUS      5
 106
 107 struct solos_card {
 108         void __iomem *config_regs;
 109         void __iomem *buffers;
 110         int nr_ports;
 111         int tx_mask;
 112         struct pci_dev *dev;
 113         struct atm_dev *atmdev[4];
 114         struct tasklet_struct tlet;
 115         spinlock_t tx_lock;
 116         spinlock_t tx_queue_lock;
 117         spinlock_t cli_queue_lock;
 118         spinlock_t param_queue_lock;
 119         struct list_head param_queue;
 120         struct sk_buff_head tx_queue[4];
 121         struct sk_buff_head cli_queue[4];
 122         struct sk_buff *tx_skb[4];
 123         struct sk_buff *rx_skb[4];
 124         wait_queue_head_t param_wq;
 125         wait_queue_head_t fw_wq;
 126         int using_dma;
 127         int fpga_version;
 128         int buffer_size;
 129 };
 130
 131
 132 struct solos_param {
 133         struct list_head list;
 134         pid_t pid;
 135         int port;
 136         struct sk_buff *response;
 137 };
 138
 139 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
 140
 141 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
 142 MODULE_DESCRIPTION("Solos PCI driver");
 143 MODULE_VERSION(VERSION);
 144 MODULE_LICENSE("GPL");
 145 MODULE_FIRMWARE("solos-FPGA.bin");
 146 MODULE_FIRMWARE("solos-Firmware.bin");
 147 MODULE_FIRMWARE("solos-db-FPGA.bin");
 148 MODULE_PARM_DESC(reset, "Reset Solos chips on startup");
 149 MODULE_PARM_DESC(atmdebug, "Print ATM data");
 150 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
 151 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
 152 MODULE_PARM_DESC(db_firmware_upgrade, "Initiate daughter board Solos firmware upgrade");
 153 MODULE_PARM_DESC(db_fpga_upgrade, "Initiate daughter board FPGA upgrade");
 154 module_param(reset, int, 0444);
 155 module_param(atmdebug, int, 0644);
 156 module_param(firmware_upgrade, int, 0444);
 157 module_param(fpga_upgrade, int, 0444);
 158 module_param(db_firmware_upgrade, int, 0444);
 159 module_param(db_fpga_upgrade, int, 0444);
 160
 161 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
 162                        struct atm_vcc *vcc);
 163 static uint32_t fpga_tx(struct solos_card *);
 164 static irqreturn_t solos_irq(int irq, void *dev_id);
 165 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
 166 static int list_vccs(int vci);
 167 static void release_vccs(struct atm_dev *dev);
 168 static int atm_init(struct solos_card *);
 169 static void atm_remove(struct solos_card *);
 170 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
 171 static void solos_bh(unsigned long);
 172 static int print_buffer(struct sk_buff *buf);
 173
 174 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
 175 {
 176         if (vcc->pop)
 177                 vcc->pop(vcc, skb);
 178         else
 179                 dev_kfree_skb_any(skb);
 180 }
 181
 182 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
 183                                 char *buf)
 184 {
 185         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 186         struct solos_card *card = atmdev->dev_data;
 187         struct solos_param prm;
 188         struct sk_buff *skb;
 189         struct pkt_hdr *header;
 190         int buflen;
 191
 192         buflen = strlen(attr->attr.name) + 10;
 193
 194         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
 195         if (!skb) {
 196                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
 197                 return -ENOMEM;
 198         }
 199
 200         header = (void *)skb_put(skb, sizeof(*header));
 201
 202         buflen = snprintf((void *)&header[1], buflen - 1,
 203                           "L%05d\n%s\n", current->pid, attr->attr.name);
 204         skb_put(skb, buflen);
 205
 206         header->size = cpu_to_le16(buflen);
 207         header->vpi = cpu_to_le16(0);
 208         header->vci = cpu_to_le16(0);
 209         header->type = cpu_to_le16(PKT_COMMAND);
 210
 211         prm.pid = current->pid;
 212         prm.response = NULL;
 213         prm.port = SOLOS_CHAN(atmdev);
 214
 215         spin_lock_irq(&card->param_queue_lock);
 216         list_add(&prm.list, &card->param_queue);
 217         spin_unlock_irq(&card->param_queue_lock);
 218
 219         fpga_queue(card, prm.port, skb, NULL);
 220
 221         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
 222
 223         spin_lock_irq(&card->param_queue_lock);
 224         list_del(&prm.list);
 225         spin_unlock_irq(&card->param_queue_lock);
 226
 227         if (!prm.response)
 228                 return -EIO;
 229
 230         buflen = prm.response->len;
 231         memcpy(buf, prm.response->data, buflen);
 232         kfree_skb(prm.response);
 233
 234         return buflen;
 235 }
 236
 237 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
 238                                  const char *buf, size_t count)
 239 {
 240         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 241         struct solos_card *card = atmdev->dev_data;
 242         struct solos_param prm;
 243         struct sk_buff *skb;
 244         struct pkt_hdr *header;
 245         int buflen;
 246         ssize_t ret;
 247
 248         buflen = strlen(attr->attr.name) + 11 + count;
 249
 250         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
 251         if (!skb) {
 252                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
 253                 return -ENOMEM;
 254         }
 255
 256         header = (void *)skb_put(skb, sizeof(*header));
 257
 258         buflen = snprintf((void *)&header[1], buflen - 1,
 259                           "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
 260
 261         skb_put(skb, buflen);
 262         header->size = cpu_to_le16(buflen);
 263         header->vpi = cpu_to_le16(0);
 264         header->vci = cpu_to_le16(0);
 265         header->type = cpu_to_le16(PKT_COMMAND);
 266
 267         prm.pid = current->pid;
 268         prm.response = NULL;
 269         prm.port = SOLOS_CHAN(atmdev);
 270
 271         spin_lock_irq(&card->param_queue_lock);
 272         list_add(&prm.list, &card->param_queue);
 273         spin_unlock_irq(&card->param_queue_lock);
 274
 275         fpga_queue(card, prm.port, skb, NULL);
 276
 277         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
 278
 279         spin_lock_irq(&card->param_queue_lock);
 280         list_del(&prm.list);
 281         spin_unlock_irq(&card->param_queue_lock);
 282
 283         skb = prm.response;
 284
 285         if (!skb)
 286                 return -EIO;
 287
 288         buflen = skb->len;
 289
 290         /* Sometimes it has a newline, sometimes it doesn't. */
 291         if (skb->data[buflen - 1] == '\n')
 292                 buflen--;
 293
 294         if (buflen == 2 && !strncmp(skb->data, "OK", 2))
 295                 ret = count;
 296         else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
 297                 ret = -EIO;
 298         else {
 299                 /* We know we have enough space allocated for this; we allocated
 300                    it ourselves */
 301                 skb->data[buflen] = 0;
 302
 303                 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
 304                          skb->data);
 305                 ret = -EIO;
 306         }
 307         kfree_skb(skb);
 308
 309         return ret;
 310 }
 311
 312 static char *next_string(struct sk_buff *skb)
 313 {
 314         int i = 0;
 315         char *this = skb->data;
 316
 317         for (i = 0; i < skb->len; i++) {
 318                 if (this[i] == '\n') {
 319                         this[i] = 0;
 320                         skb_pull(skb, i + 1);
 321                         return this;
 322                 }
 323                 if (!isprint(this[i]))
 324                         return NULL;
 325         }
 326         return NULL;
 327 }
 328
 329 /*
 330  * Status packet has fields separated by \n, starting with a version number
 331  * for the information therein. Fields are....
 332  *
 333  *     packet version
 334  *     RxBitRate        (version >= 1)
 335  *     TxBitRate        (version >= 1)
 336  *     State            (version >= 1)
 337  *     LocalSNRMargin   (version >= 1)
 338  *     LocalLineAttn    (version >= 1)
 339  */
 340 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
 341 {
 342         char *str, *end, *state_str, *snr, *attn;
 343         int ver, rate_up, rate_down;
 344
 345         if (!card->atmdev[port])
 346                 return -ENODEV;
 347
 348         str = next_string(skb);
 349         if (!str)
 350                 return -EIO;
 351
 352         ver = simple_strtol(str, NULL, 10);
 353         if (ver < 1) {
 354                 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
 355                          ver);
 356                 return -EIO;
 357         }
 358
 359         str = next_string(skb);
 360         if (!str)
 361                 return -EIO;
 362         if (!strcmp(str, "ERROR")) {
 363                 dev_dbg(&card->dev->dev, "Status packet indicated Solos error on port %d (starting up?)\n",
 364                          port);
 365                 return 0;
 366         }
 367
 368         rate_down = simple_strtol(str, &end, 10);
 369         if (*end)
 370                 return -EIO;
 371
 372         str = next_string(skb);
 373         if (!str)
 374                 return -EIO;
 375         rate_up = simple_strtol(str, &end, 10);
 376         if (*end)
 377                 return -EIO;
 378
 379         state_str = next_string(skb);
 380         if (!state_str)
 381                 return -EIO;
 382
 383         /* Anything but 'Showtime' is down */
 384         if (strcmp(state_str, "Showtime")) {
 385                 card->atmdev[port]->signal = ATM_PHY_SIG_LOST;
 386                 release_vccs(card->atmdev[port]);
 387                 dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
 388                 return 0;
 389         }
 390
 391         snr = next_string(skb);
 392         if (!snr)
 393                 return -EIO;
 394         attn = next_string(skb);
 395         if (!attn)
 396                 return -EIO;
 397
 398         dev_info(&card->dev->dev, "Port %d: %s @%d/%d kb/s%s%s%s%s\n",
 399                  port, state_str, rate_down/1000, rate_up/1000,
 400                  snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
 401
 402         card->atmdev[port]->link_rate = rate_down / 424;
 403         card->atmdev[port]->signal = ATM_PHY_SIG_FOUND;
 404
 405         return 0;
 406 }
 407
 408 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
 409 {
 410         struct solos_param *prm;
 411         unsigned long flags;
 412         int cmdpid;
 413         int found = 0;
 414
 415         if (skb->len < 7)
 416                 return 0;
 417
 418         if (skb->data[0] != 'L'    || !isdigit(skb->data[1]) ||
 419             !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
 420             !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
 421             skb->data[6] != '\n')
 422                 return 0;
 423
 424         cmdpid = simple_strtol(&skb->data[1], NULL, 10);
 425
 426         spin_lock_irqsave(&card->param_queue_lock, flags);
 427         list_for_each_entry(prm, &card->param_queue, list) {
 428                 if (prm->port == port && prm->pid == cmdpid) {
 429                         prm->response = skb;
 430                         skb_pull(skb, 7);
 431                         wake_up(&card->param_wq);
 432                         found = 1;
 433                         break;
 434                 }
 435         }
 436         spin_unlock_irqrestore(&card->param_queue_lock, flags);
 437         return found;
 438 }
 439
 440 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
 441                             char *buf)
 442 {
 443         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 444         struct solos_card *card = atmdev->dev_data;
 445         struct sk_buff *skb;
 446
 447         spin_lock(&card->cli_queue_lock);
 448         skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
 449         spin_unlock(&card->cli_queue_lock);
 450         if(skb == NULL)
 451                 return sprintf(buf, "No data.\n");
 452
 453         memcpy(buf, skb->data, skb->len);
 454         dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
 455
 456         kfree_skb(skb);
 457         return skb->len;
 458 }
 459
 460 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
 461 {
 462         struct sk_buff *skb;
 463         struct pkt_hdr *header;
 464
 465         if (size > (BUF_SIZE - sizeof(*header))) {
 466                 dev_dbg(&card->dev->dev, "Command is too big.  Dropping request\n");
 467                 return 0;
 468         }
 469         skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
 470         if (!skb) {
 471                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
 472                 return 0;
 473         }
 474
 475         header = (void *)skb_put(skb, sizeof(*header));
 476
 477         header->size = cpu_to_le16(size);
 478         header->vpi = cpu_to_le16(0);
 479         header->vci = cpu_to_le16(0);
 480         header->type = cpu_to_le16(PKT_COMMAND);
 481
 482         memcpy(skb_put(skb, size), buf, size);
 483
 484         fpga_queue(card, dev, skb, NULL);
 485
 486         return 0;
 487 }
 488
 489 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
 490                              const char *buf, size_t count)
 491 {
 492         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 493         struct solos_card *card = atmdev->dev_data;
 494         int err;
 495
 496         err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
 497
 498         return err?:count;
 499 }
 500
 501 static DEVICE_ATTR(console, 0644, console_show, console_store);
 502
 503
 504 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
 505 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
 506
 507 #include "solos-attrlist.c"
 508
 509 #undef SOLOS_ATTR_RO
 510 #undef SOLOS_ATTR_RW
 511
 512 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
 513 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
 514
 515 static struct attribute *solos_attrs[] = {
 516 #include "solos-attrlist.c"
 517         NULL
 518 };
 519
 520 static struct attribute_group solos_attr_group = {
 521         .attrs = solos_attrs,
 522         .name = "parameters",
 523 };
 524
 525 static int flash_upgrade(struct solos_card *card, int chip)
 526 {
 527         const struct firmware *fw;
 528         const char *fw_name;
 529         uint32_t data32 = 0;
 530         int blocksize = 0;
 531         int numblocks = 0;
 532         int offset;
 533
 534         switch (chip) {
 535         case 0:
 536                 fw_name = "solos-FPGA.bin";
 537                 blocksize = FPGA_BLOCK;
 538                 break;
 539         case 1:
 540                 fw_name = "solos-Firmware.bin";
 541                 blocksize = SOLOS_BLOCK;
 542                 break;
 543         case 2:
 544                 if (card->fpga_version > LEGACY_BUFFERS){
 545                         fw_name = "solos-db-FPGA.bin";
 546                         blocksize = FPGA_BLOCK;
 547                 } else {
 548                         dev_info(&card->dev->dev, "FPGA version doesn't support"
 549                                         " daughter board upgrades\n");
 550                         return -EPERM;
 551                 }
 552                 break;
 553         case 3:
 554                 if (card->fpga_version > LEGACY_BUFFERS){
 555                         fw_name = "solos-Firmware.bin";
 556                         blocksize = SOLOS_BLOCK;
 557                 } else {
 558                         dev_info(&card->dev->dev, "FPGA version doesn't support"
 559                                         " daughter board upgrades\n");
 560                         return -EPERM;
 561                 }
 562                 break;
 563         default:
 564                 return -ENODEV;
 565         }
 566
 567         if (request_firmware(&fw, fw_name, &card->dev->dev))
 568                 return -ENOENT;
 569
 570         dev_info(&card->dev->dev, "Flash upgrade starting\n");
 571
 572         numblocks = fw->size / blocksize;
 573         dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
 574         dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
 575
 576         dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
 577         iowrite32(1, card->config_regs + FPGA_MODE);
 578         data32 = ioread32(card->config_regs + FPGA_MODE);
 579
 580         /* Set mode to Chip Erase */
 581         if(chip == 0 || chip == 2)
 582                 dev_info(&card->dev->dev, "Set FPGA Flash mode to FPGA Chip Erase\n");
 583         if(chip == 1 || chip == 3)
 584                 dev_info(&card->dev->dev, "Set FPGA Flash mode to Solos Chip Erase\n");
 585         iowrite32((chip * 2), card->config_regs + FLASH_MODE);
 586
 587
 588         iowrite32(1, card->config_regs + WRITE_FLASH);
 589         wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
 590
 591         for (offset = 0; offset < fw->size; offset += blocksize) {
 592                 int i;
 593
 594                 /* Clear write flag */
 595                 iowrite32(0, card->config_regs + WRITE_FLASH);
 596
 597                 /* Set mode to Block Write */
 598                 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
 599                 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
 600
 601                 /* Copy block to buffer, swapping each 16 bits */
 602                 for(i = 0; i < blocksize; i += 4) {
 603                         uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
 604                         if(card->fpga_version > LEGACY_BUFFERS)
 605                                 iowrite32(word, FLASH_BUF + i);
 606                         else
 607                                 iowrite32(word, RX_BUF(card, 3) + i);
 608                 }
 609
 610                 /* Specify block number and then trigger flash write */
 611                 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
 612                 iowrite32(1, card->config_regs + WRITE_FLASH);
 613                 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
 614         }
 615
 616         release_firmware(fw);
 617         iowrite32(0, card->config_regs + WRITE_FLASH);
 618         iowrite32(0, card->config_regs + FPGA_MODE);
 619         iowrite32(0, card->config_regs + FLASH_MODE);
 620         dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
 621         return 0;
 622 }
 623
 624 static irqreturn_t solos_irq(int irq, void *dev_id)
 625 {
 626         struct solos_card *card = dev_id;
 627         int handled = 1;
 628
 629         iowrite32(0, card->config_regs + IRQ_CLEAR);
 630
 631         /* If we're up and running, just kick the tasklet to process TX/RX */
 632         if (card->atmdev[0])
 633                 tasklet_schedule(&card->tlet);
 634         else
 635                 wake_up(&card->fw_wq);
 636
 637         return IRQ_RETVAL(handled);
 638 }
 639
 640 void solos_bh(unsigned long card_arg)
 641 {
 642         struct solos_card *card = (void *)card_arg;
 643         uint32_t card_flags;
 644         uint32_t rx_done = 0;
 645         int port;
 646
 647         /*
 648          * Since fpga_tx() is going to need to read the flags under its lock,
 649          * it can return them to us so that we don't have to hit PCI MMIO
 650          * again for the same information
 651          */
 652         card_flags = fpga_tx(card);
 653
 654         for (port = 0; port < card->nr_ports; port++) {
 655                 if (card_flags & (0x10 << port)) {
 656                         struct pkt_hdr _hdr, *header;
 657                         struct sk_buff *skb;
 658                         struct atm_vcc *vcc;
 659                         int size;
 660
 661                         if (card->using_dma) {
 662                                 skb = card->rx_skb[port];
 663                                 card->rx_skb[port] = NULL;
 664
 665                                 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
 666                                                  RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
 667
 668                                 header = (void *)skb->data;
 669                                 size = le16_to_cpu(header->size);
 670                                 skb_put(skb, size + sizeof(*header));
 671                                 skb_pull(skb, sizeof(*header));
 672                         } else {
 673                                 header = &_hdr;
 674
 675                                 rx_done |= 0x10 << port;
 676
 677                                 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
 678
 679                                 size = le16_to_cpu(header->size);
 680                                 if (size > (card->buffer_size - sizeof(*header))){
 681                                         dev_warn(&card->dev->dev, "Invalid buffer size\n");
 682                                         continue;
 683                                 }
 684
 685                                 skb = alloc_skb(size + 1, GFP_ATOMIC);
 686                                 if (!skb) {
 687                                         if (net_ratelimit())
 688                                                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
 689                                         continue;
 690                                 }
 691
 692                                 memcpy_fromio(skb_put(skb, size),
 693                                               RX_BUF(card, port) + sizeof(*header),
 694                                               size);
 695                         }
 696                         if (atmdebug) {
 697                                 dev_info(&card->dev->dev, "Received: device %d\n", port);
 698                                 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
 699                                          size, le16_to_cpu(header->vpi),
 700                                          le16_to_cpu(header->vci));
 701                                 print_buffer(skb);
 702                         }
 703
 704                         switch (le16_to_cpu(header->type)) {
 705                         case PKT_DATA:
 706                                 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
 707                                                le16_to_cpu(header->vci));
 708                                 if (!vcc) {
 709                                         if (net_ratelimit())
 710                                                 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
 711                                                          le16_to_cpu(header->vci), le16_to_cpu(header->vpi),
 712                                                          port);
 713                                         continue;
 714                                 }
 715                                 atm_charge(vcc, skb->truesize);
 716                                 vcc->push(vcc, skb);
 717                                 atomic_inc(&vcc->stats->rx);
 718                                 break;
 719
 720                         case PKT_STATUS:
 721                                 if (process_status(card, port, skb) &&
 722                                     net_ratelimit()) {
 723                                         dev_warn(&card->dev->dev, "Bad status packet of %d bytes on port %d:\n", skb->len, port);
 724                                         print_buffer(skb);
 725                                 }
 726                                 dev_kfree_skb_any(skb);
 727                                 break;
 728
 729                         case PKT_COMMAND:
 730                         default: /* FIXME: Not really, surely? */
 731                                 if (process_command(card, port, skb))
 732                                         break;
 733                                 spin_lock(&card->cli_queue_lock);
 734                                 if (skb_queue_len(&card->cli_queue[port]) > 10) {
 735                                         if (net_ratelimit())
 736                                                 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
 737                                                          port);
 738                                         dev_kfree_skb_any(skb);
 739                                 } else
 740                                         skb_queue_tail(&card->cli_queue[port], skb);
 741                                 spin_unlock(&card->cli_queue_lock);
 742                                 break;
 743                         }
 744                 }
 745                 /* Allocate RX skbs for any ports which need them */
 746                 if (card->using_dma && card->atmdev[port] &&
 747                     !card->rx_skb[port]) {
 748                         struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
 749                         if (skb) {
 750                                 SKB_CB(skb)->dma_addr =
 751                                         pci_map_single(card->dev, skb->data,
 752                                                        RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
 753                                 iowrite32(SKB_CB(skb)->dma_addr,
 754                                           card->config_regs + RX_DMA_ADDR(port));
 755                                 card->rx_skb[port] = skb;
 756                         } else {
 757                                 if (net_ratelimit())
 758                                         dev_warn(&card->dev->dev, "Failed to allocate RX skb");
 759
 760                                 /* We'll have to try again later */
 761                                 tasklet_schedule(&card->tlet);
 762                         }
 763                 }
 764         }
 765         if (rx_done)
 766                 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
 767
 768         return;
 769 }
 770
 771 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
 772 {
 773         struct hlist_head *head;
 774         struct atm_vcc *vcc = NULL;
 775         struct hlist_node *node;
 776         struct sock *s;
 777
 778         read_lock(&vcc_sklist_lock);
 779         head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
 780         sk_for_each(s, node, head) {
 781                 vcc = atm_sk(s);
 782                 if (vcc->dev == dev && vcc->vci == vci &&
 783                     vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
 784                         goto out;
 785         }
 786         vcc = NULL;
 787  out:
 788         read_unlock(&vcc_sklist_lock);
 789         return vcc;
 790 }
 791
 792 static int list_vccs(int vci)
 793 {
 794         struct hlist_head *head;
 795         struct atm_vcc *vcc;
 796         struct hlist_node *node;
 797         struct sock *s;
 798         int num_found = 0;
 799         int i;
 800
 801         read_lock(&vcc_sklist_lock);
 802         if (vci != 0){
 803                 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
 804                 sk_for_each(s, node, head) {
 805                         num_found ++;
 806                         vcc = atm_sk(s);
 807                         printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
 808                                vcc->dev->number,
 809                                vcc->vpi,
 810                                vcc->vci);
 811                 }
 812         } else {
 813                 for(i = 0; i < VCC_HTABLE_SIZE; i++){
 814                         head = &vcc_hash[i];
 815                         sk_for_each(s, node, head) {
 816                                 num_found ++;
 817                                 vcc = atm_sk(s);
 818                                 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
 819                                        vcc->dev->number,
 820                                        vcc->vpi,
 821                                        vcc->vci);
 822                         }
 823                 }
 824         }
 825         read_unlock(&vcc_sklist_lock);
 826         return num_found;
 827 }
 828
 829 static void release_vccs(struct atm_dev *dev)
 830 {
 831         int i;
 832
 833         write_lock_irq(&vcc_sklist_lock);
 834         for (i = 0; i < VCC_HTABLE_SIZE; i++) {
 835                 struct hlist_head *head = &vcc_hash[i];
 836                 struct hlist_node *node, *tmp;
 837                 struct sock *s;
 838                 struct atm_vcc *vcc;
 839
 840                 sk_for_each_safe(s, node, tmp, head) {
 841                         vcc = atm_sk(s);
 842                         if (vcc->dev == dev) {
 843                                 vcc_release_async(vcc, -EPIPE);
 844                                 sk_del_node_init(s);
 845                         }
 846                 }
 847         }
 848         write_unlock_irq(&vcc_sklist_lock);
 849 }
 850
 851
 852 static int popen(struct atm_vcc *vcc)
 853 {
 854         struct solos_card *card = vcc->dev->dev_data;
 855         struct sk_buff *skb;
 856         struct pkt_hdr *header;
 857
 858         if (vcc->qos.aal != ATM_AAL5) {
 859                 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
 860                          vcc->qos.aal);
 861                 return -EINVAL;
 862         }
 863
 864         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
 865         if (!skb && net_ratelimit()) {
 866                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
 867                 return -ENOMEM;
 868         }
 869         header = (void *)skb_put(skb, sizeof(*header));
 870
 871         header->size = cpu_to_le16(0);
 872         header->vpi = cpu_to_le16(vcc->vpi);
 873         header->vci = cpu_to_le16(vcc->vci);
 874         header->type = cpu_to_le16(PKT_POPEN);
 875
 876         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
 877
 878         set_bit(ATM_VF_ADDR, &vcc->flags);
 879         set_bit(ATM_VF_READY, &vcc->flags);
 880         list_vccs(0);
 881
 882
 883         return 0;
 884 }
 885
 886 static void pclose(struct atm_vcc *vcc)
 887 {
 888         struct solos_card *card = vcc->dev->dev_data;
 889         struct sk_buff *skb;
 890         struct pkt_hdr *header;
 891
 892         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
 893         if (!skb) {
 894                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
 895                 return;
 896         }
 897         header = (void *)skb_put(skb, sizeof(*header));
 898
 899         header->size = cpu_to_le16(0);
 900         header->vpi = cpu_to_le16(vcc->vpi);
 901         header->vci = cpu_to_le16(vcc->vci);
 902         header->type = cpu_to_le16(PKT_PCLOSE);
 903
 904         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
 905
 906         clear_bit(ATM_VF_ADDR, &vcc->flags);
 907         clear_bit(ATM_VF_READY, &vcc->flags);
 908
 909         return;
 910 }
 911
 912 static int print_buffer(struct sk_buff *buf)
 913 {
 914         int len,i;
 915         char msg[500];
 916         char item[10];
 917
 918         len = buf->len;
 919         for (i = 0; i < len; i++){
 920                 if(i % 8 == 0)
 921                         sprintf(msg, "%02X: ", i);
 922
 923                 sprintf(item,"%02X ",*(buf->data + i));
 924                 strcat(msg, item);
 925                 if(i % 8 == 7) {
 926                         sprintf(item, "\n");
 927                         strcat(msg, item);
 928                         printk(KERN_DEBUG "%s", msg);
 929                 }
 930         }
 931         if (i % 8 != 0) {
 932                 sprintf(item, "\n");
 933                 strcat(msg, item);
 934                 printk(KERN_DEBUG "%s", msg);
 935         }
 936         printk(KERN_DEBUG "\n");
 937
 938         return 0;
 939 }
 940
 941 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
 942                        struct atm_vcc *vcc)
 943 {
 944         int old_len;
 945         unsigned long flags;
 946
 947         SKB_CB(skb)->vcc = vcc;
 948
 949         spin_lock_irqsave(&card->tx_queue_lock, flags);
 950         old_len = skb_queue_len(&card->tx_queue[port]);
 951         skb_queue_tail(&card->tx_queue[port], skb);
 952         if (!old_len)
 953                 card->tx_mask |= (1 << port);
 954         spin_unlock_irqrestore(&card->tx_queue_lock, flags);
 955
 956         /* Theoretically we could just schedule the tasklet here, but
 957            that introduces latency we don't want -- it's noticeable */
 958         if (!old_len)
 959                 fpga_tx(card);
 960 }
 961
 962 static uint32_t fpga_tx(struct solos_card *card)
 963 {
 964         uint32_t tx_pending, card_flags;
 965         uint32_t tx_started = 0;
 966         struct sk_buff *skb;
 967         struct atm_vcc *vcc;
 968         unsigned char port;
 969         unsigned long flags;
 970
 971         spin_lock_irqsave(&card->tx_lock, flags);
 972
 973         card_flags = ioread32(card->config_regs + FLAGS_ADDR);
 974         /*
 975          * The queue lock is required for _writing_ to tx_mask, but we're
 976          * OK to read it here without locking. The only potential update
 977          * that we could race with is in fpga_queue() where it sets a bit
 978          * for a new port... but it's going to call this function again if
 979          * it's doing that, anyway.
 980          */
 981         tx_pending = card->tx_mask & ~card_flags;
 982
 983         for (port = 0; tx_pending; tx_pending >>= 1, port++) {
 984                 if (tx_pending & 1) {
 985                         struct sk_buff *oldskb = card->tx_skb[port];
 986                         if (oldskb)
 987                                 pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
 988                                                  oldskb->len, PCI_DMA_TODEVICE);
 989
 990                         spin_lock(&card->tx_queue_lock);
 991                         skb = skb_dequeue(&card->tx_queue[port]);
 992                         if (!skb)
 993                                 card->tx_mask &= ~(1 << port);
 994                         spin_unlock(&card->tx_queue_lock);
 995
 996                         if (skb && !card->using_dma) {
 997                                 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
 998                                 tx_started |= 1 << port;
 999                                 oldskb = skb; /* We're done with this skb already */
1000                         } else if (skb && card->using_dma) {
1001                                 SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
1002                                                                        skb->len, PCI_DMA_TODEVICE);
1003                                 iowrite32(SKB_CB(skb)->dma_addr,
1004                                           card->config_regs + TX_DMA_ADDR(port));
1005                         }
1006
1007                         if (!oldskb)
1008                                 continue;
1009
1010                         /* Clean up and free oldskb now it's gone */
1011                         if (atmdebug) {
1012                                 dev_info(&card->dev->dev, "Transmitted: port %d\n",
1013                                          port);
1014                                 print_buffer(oldskb);
1015                         }
1016
1017                         vcc = SKB_CB(oldskb)->vcc;
1018
1019                         if (vcc) {
1020                                 atomic_inc(&vcc->stats->tx);
1021                                 solos_pop(vcc, oldskb);
1022                         } else
1023                                 dev_kfree_skb_irq(oldskb);
1024
1025                 }
1026         }
1027         /* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
1028         if (tx_started)
1029                 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
1030
1031         spin_unlock_irqrestore(&card->tx_lock, flags);
1032         return card_flags;
1033 }
1034
1035 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
1036 {
1037         struct solos_card *card = vcc->dev->dev_data;
1038         struct pkt_hdr *header;
1039         int pktlen;
1040
1041         pktlen = skb->len;
1042         if (pktlen > (BUF_SIZE - sizeof(*header))) {
1043                 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
1044                 solos_pop(vcc, skb);
1045                 return 0;
1046         }
1047
1048         if (!skb_clone_writable(skb, sizeof(*header))) {
1049                 int expand_by = 0;
1050                 int ret;
1051
1052                 if (skb_headroom(skb) < sizeof(*header))
1053                         expand_by = sizeof(*header) - skb_headroom(skb);
1054
1055                 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1056                 if (ret) {
1057                         dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1058                         solos_pop(vcc, skb);
1059                         return ret;
1060                 }
1061         }
1062
1063         header = (void *)skb_push(skb, sizeof(*header));
1064
1065         /* This does _not_ include the size of the header */
1066         header->size = cpu_to_le16(pktlen);
1067         header->vpi = cpu_to_le16(vcc->vpi);
1068         header->vci = cpu_to_le16(vcc->vci);
1069         header->type = cpu_to_le16(PKT_DATA);
1070
1071         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1072
1073         return 0;
1074 }
1075
1076 static struct atmdev_ops fpga_ops = {
1077         .open =         popen,
1078         .close =        pclose,
1079         .ioctl =        NULL,
1080         .getsockopt =   NULL,
1081         .setsockopt =   NULL,
1082         .send =         psend,
1083         .send_oam =     NULL,
1084         .phy_put =      NULL,
1085         .phy_get =      NULL,
1086         .change_qos =   NULL,
1087         .proc_read =    NULL,
1088         .owner =        THIS_MODULE
1089 };
1090
1091 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1092 {
1093         int err;
1094         uint16_t fpga_ver;
1095         uint8_t major_ver, minor_ver;
1096         uint32_t data32;
1097         struct solos_card *card;
1098
1099         card = kzalloc(sizeof(*card), GFP_KERNEL);
1100         if (!card)
1101                 return -ENOMEM;
1102
1103         card->dev = dev;
1104         init_waitqueue_head(&card->fw_wq);
1105         init_waitqueue_head(&card->param_wq);
1106
1107         err = pci_enable_device(dev);
1108         if (err) {
1109                 dev_warn(&dev->dev,  "Failed to enable PCI device\n");
1110                 goto out;
1111         }
1112
1113         err = pci_set_dma_mask(dev, DMA_BIT_MASK(32));
1114         if (err) {
1115                 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1116                 goto out;
1117         }
1118
1119         err = pci_request_regions(dev, "solos");
1120         if (err) {
1121                 dev_warn(&dev->dev, "Failed to request regions\n");
1122                 goto out;
1123         }
1124
1125         card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1126         if (!card->config_regs) {
1127                 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1128                 goto out_release_regions;
1129         }
1130         card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1131         if (!card->buffers) {
1132                 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1133                 goto out_unmap_config;
1134         }
1135
1136         if (reset) {
1137                 iowrite32(1, card->config_regs + FPGA_MODE);
1138                 data32 = ioread32(card->config_regs + FPGA_MODE);
1139
1140                 iowrite32(0, card->config_regs + FPGA_MODE);
1141                 data32 = ioread32(card->config_regs + FPGA_MODE);
1142         }
1143
1144         data32 = ioread32(card->config_regs + FPGA_VER);
1145         fpga_ver = (data32 & 0x0000FFFF);
1146         major_ver = ((data32 & 0xFF000000) >> 24);
1147         minor_ver = ((data32 & 0x00FF0000) >> 16);
1148         card->fpga_version = FPGA_VERSION(major_ver,minor_ver);
1149         if (card->fpga_version > LEGACY_BUFFERS)
1150                 card->buffer_size = BUF_SIZE;
1151         else
1152                 card->buffer_size = OLD_BUF_SIZE;
1153         dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1154                  major_ver, minor_ver, fpga_ver);
1155
1156         if (card->fpga_version >= DMA_SUPPORTED){
1157                 card->using_dma = 1;
1158         } else {
1159                 card->using_dma = 0;
1160                 /* Set RX empty flag for all ports */
1161                 iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1162         }
1163
1164         data32 = ioread32(card->config_regs + PORTS);
1165         card->nr_ports = (data32 & 0x000000FF);
1166
1167         pci_set_drvdata(dev, card);
1168
1169         tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1170         spin_lock_init(&card->tx_lock);
1171         spin_lock_init(&card->tx_queue_lock);
1172         spin_lock_init(&card->cli_queue_lock);
1173         spin_lock_init(&card->param_queue_lock);
1174         INIT_LIST_HEAD(&card->param_queue);
1175
1176         err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1177                           "solos-pci", card);
1178         if (err) {
1179                 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1180                 goto out_unmap_both;
1181         }
1182
1183         iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1184
1185         if (fpga_upgrade)
1186                 flash_upgrade(card, 0);
1187
1188         if (firmware_upgrade)
1189                 flash_upgrade(card, 1);
1190
1191         if (db_fpga_upgrade)
1192                 flash_upgrade(card, 2);
1193
1194         if (db_firmware_upgrade)
1195                 flash_upgrade(card, 3);
1196
1197         err = atm_init(card);
1198         if (err)
1199                 goto out_free_irq;
1200
1201         return 0;
1202
1203  out_free_irq:
1204         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1205         free_irq(dev->irq, card);
1206         tasklet_kill(&card->tlet);
1207
1208  out_unmap_both:
1209         pci_set_drvdata(dev, NULL);
1210         pci_iounmap(dev, card->config_regs);
1211  out_unmap_config:
1212         pci_iounmap(dev, card->buffers);
1213  out_release_regions:
1214         pci_release_regions(dev);
1215  out:
1216         kfree(card);
1217         return err;
1218 }
1219
1220 static int atm_init(struct solos_card *card)
1221 {
1222         int i;
1223
1224         for (i = 0; i < card->nr_ports; i++) {
1225                 struct sk_buff *skb;
1226                 struct pkt_hdr *header;
1227
1228                 skb_queue_head_init(&card->tx_queue[i]);
1229                 skb_queue_head_init(&card->cli_queue[i]);
1230
1231                 card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
1232                 if (!card->atmdev[i]) {
1233                         dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1234                         atm_remove(card);
1235                         return -ENODEV;
1236                 }
1237                 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1238                         dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1239                 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1240                         dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1241
1242                 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1243
1244                 card->atmdev[i]->ci_range.vpi_bits = 8;
1245                 card->atmdev[i]->ci_range.vci_bits = 16;
1246                 card->atmdev[i]->dev_data = card;
1247                 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1248                 card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
1249
1250                 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1251                 if (!skb) {
1252                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1253                         continue;
1254                 }
1255
1256                 header = (void *)skb_put(skb, sizeof(*header));
1257
1258                 header->size = cpu_to_le16(0);
1259                 header->vpi = cpu_to_le16(0);
1260                 header->vci = cpu_to_le16(0);
1261                 header->type = cpu_to_le16(PKT_STATUS);
1262
1263                 fpga_queue(card, i, skb, NULL);
1264         }
1265         return 0;
1266 }
1267
1268 static void atm_remove(struct solos_card *card)
1269 {
1270         int i;
1271
1272         for (i = 0; i < card->nr_ports; i++) {
1273                 if (card->atmdev[i]) {
1274                         struct sk_buff *skb;
1275
1276                         dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1277
1278                         sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1279                         atm_dev_deregister(card->atmdev[i]);
1280
1281                         skb = card->rx_skb[i];
1282                         if (skb) {
1283                                 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
1284                                                  RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
1285                                 dev_kfree_skb(skb);
1286                         }
1287                         skb = card->tx_skb[i];
1288                         if (skb) {
1289                                 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
1290                                                  skb->len, PCI_DMA_TODEVICE);
1291                                 dev_kfree_skb(skb);
1292                         }
1293                         while ((skb = skb_dequeue(&card->tx_queue[i])))
1294                                 dev_kfree_skb(skb);
1295
1296                 }
1297         }
1298 }
1299
1300 static void fpga_remove(struct pci_dev *dev)
1301 {
1302         struct solos_card *card = pci_get_drvdata(dev);
1303
1304         /* Disable IRQs */
1305         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1306
1307         /* Reset FPGA */
1308         iowrite32(1, card->config_regs + FPGA_MODE);
1309         (void)ioread32(card->config_regs + FPGA_MODE);
1310
1311         atm_remove(card);
1312
1313         free_irq(dev->irq, card);
1314         tasklet_kill(&card->tlet);
1315
1316         /* Release device from reset */
1317         iowrite32(0, card->config_regs + FPGA_MODE);
1318         (void)ioread32(card->config_regs + FPGA_MODE);
1319
1320         pci_iounmap(dev, card->buffers);
1321         pci_iounmap(dev, card->config_regs);
1322
1323         pci_release_regions(dev);
1324         pci_disable_device(dev);
1325
1326         pci_set_drvdata(dev, NULL);
1327         kfree(card);
1328 }
1329
1330 static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
1331         { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1332         { 0, }
1333 };
1334
1335 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1336
1337 static struct pci_driver fpga_driver = {
1338         .name =         "solos",
1339         .id_table =     fpga_pci_tbl,
1340         .probe =        fpga_probe,
1341         .remove =       fpga_remove,
1342 };
1343
1344
1345 static int __init solos_pci_init(void)
1346 {
1347         printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1348         return pci_register_driver(&fpga_driver);
1349 }
1350
1351 static void __exit solos_pci_exit(void)
1352 {
1353         pci_unregister_driver(&fpga_driver);
1354         printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1355 }
1356
1357 module_init(solos_pci_init);
1358 module_exit(solos_pci_exit);