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   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 #include <linux/slab.h>
  44
  45 #define VERSION "0.07"
  46 #define PTAG "solos-pci"
  47
  48 #define CONFIG_RAM_SIZE 128
  49 #define FLAGS_ADDR      0x7C
  50 #define IRQ_EN_ADDR     0x78
  51 #define FPGA_VER        0x74
  52 #define IRQ_CLEAR       0x70
  53 #define WRITE_FLASH     0x6C
  54 #define PORTS           0x68
  55 #define FLASH_BLOCK     0x64
  56 #define FLASH_BUSY      0x60
  57 #define FPGA_MODE       0x5C
  58 #define FLASH_MODE      0x58
  59 #define TX_DMA_ADDR(port)       (0x40 + (4 * (port)))
  60 #define RX_DMA_ADDR(port)       (0x30 + (4 * (port)))
  61
  62 #define DATA_RAM_SIZE   32768
  63 #define BUF_SIZE        2048
  64 #define OLD_BUF_SIZE    4096 /* For FPGA versions <= 2*/
  65 #define FPGA_PAGE       528 /* FPGA flash page size*/
  66 #define SOLOS_PAGE      512 /* Solos flash page size*/
  67 #define FPGA_BLOCK      (FPGA_PAGE * 8) /* FPGA flash block size*/
  68 #define SOLOS_BLOCK     (SOLOS_PAGE * 8) /* Solos flash block size*/
  69
  70 #define RX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2)
  71 #define TX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2 + (card->buffer_size))
  72 #define FLASH_BUF ((card->buffers) + 4*(card->buffer_size)*2)
  73
  74 #define RX_DMA_SIZE     2048
  75
  76 #define FPGA_VERSION(a,b) (((a) << 8) + (b))
  77 #define LEGACY_BUFFERS  2
  78 #define DMA_SUPPORTED   4
  79
  80 static int reset = 0;
  81 static int atmdebug = 0;
  82 static int firmware_upgrade = 0;
  83 static int fpga_upgrade = 0;
  84 static int db_firmware_upgrade = 0;
  85 static int db_fpga_upgrade = 0;
  86
  87 struct pkt_hdr {
  88         __le16 size;
  89         __le16 vpi;
  90         __le16 vci;
  91         __le16 type;
  92 };
  93
  94 struct solos_skb_cb {
  95         struct atm_vcc *vcc;
  96         uint32_t dma_addr;
  97 };
  98
  99
 100 #define SKB_CB(skb)             ((struct solos_skb_cb *)skb->cb)
 101
 102 #define PKT_DATA        0
 103 #define PKT_COMMAND     1
 104 #define PKT_POPEN       3
 105 #define PKT_PCLOSE      4
 106 #define PKT_STATUS      5
 107
 108 struct solos_card {
 109         void __iomem *config_regs;
 110         void __iomem *buffers;
 111         int nr_ports;
 112         int tx_mask;
 113         struct pci_dev *dev;
 114         struct atm_dev *atmdev[4];
 115         struct tasklet_struct tlet;
 116         spinlock_t tx_lock;
 117         spinlock_t tx_queue_lock;
 118         spinlock_t cli_queue_lock;
 119         spinlock_t param_queue_lock;
 120         struct list_head param_queue;
 121         struct sk_buff_head tx_queue[4];
 122         struct sk_buff_head cli_queue[4];
 123         struct sk_buff *tx_skb[4];
 124         struct sk_buff *rx_skb[4];
 125         wait_queue_head_t param_wq;
 126         wait_queue_head_t fw_wq;
 127         int using_dma;
 128         int fpga_version;
 129         int buffer_size;
 130 };
 131
 132
 133 struct solos_param {
 134         struct list_head list;
 135         pid_t pid;
 136         int port;
 137         struct sk_buff *response;
 138 };
 139
 140 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
 141
 142 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
 143 MODULE_DESCRIPTION("Solos PCI driver");
 144 MODULE_VERSION(VERSION);
 145 MODULE_LICENSE("GPL");
 146 MODULE_FIRMWARE("solos-FPGA.bin");
 147 MODULE_FIRMWARE("solos-Firmware.bin");
 148 MODULE_FIRMWARE("solos-db-FPGA.bin");
 149 MODULE_PARM_DESC(reset, "Reset Solos chips on startup");
 150 MODULE_PARM_DESC(atmdebug, "Print ATM data");
 151 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
 152 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
 153 MODULE_PARM_DESC(db_firmware_upgrade, "Initiate daughter board Solos firmware upgrade");
 154 MODULE_PARM_DESC(db_fpga_upgrade, "Initiate daughter board FPGA upgrade");
 155 module_param(reset, int, 0444);
 156 module_param(atmdebug, int, 0644);
 157 module_param(firmware_upgrade, int, 0444);
 158 module_param(fpga_upgrade, int, 0444);
 159 module_param(db_firmware_upgrade, int, 0444);
 160 module_param(db_fpga_upgrade, int, 0444);
 161
 162 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
 163                        struct atm_vcc *vcc);
 164 static uint32_t fpga_tx(struct solos_card *);
 165 static irqreturn_t solos_irq(int irq, void *dev_id);
 166 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
 167 static int list_vccs(int vci);
 168 static void release_vccs(struct atm_dev *dev);
 169 static int atm_init(struct solos_card *);
 170 static void atm_remove(struct solos_card *);
 171 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
 172 static void solos_bh(unsigned long);
 173 static int print_buffer(struct sk_buff *buf);
 174
 175 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
 176 {
 177         if (vcc->pop)
 178                 vcc->pop(vcc, skb);
 179         else
 180                 dev_kfree_skb_any(skb);
 181 }
 182
 183 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
 184                                 char *buf)
 185 {
 186         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 187         struct solos_card *card = atmdev->dev_data;
 188         struct solos_param prm;
 189         struct sk_buff *skb;
 190         struct pkt_hdr *header;
 191         int buflen;
 192
 193         buflen = strlen(attr->attr.name) + 10;
 194
 195         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
 196         if (!skb) {
 197                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
 198                 return -ENOMEM;
 199         }
 200
 201         header = (void *)skb_put(skb, sizeof(*header));
 202
 203         buflen = snprintf((void *)&header[1], buflen - 1,
 204                           "L%05d\n%s\n", current->pid, attr->attr.name);
 205         skb_put(skb, buflen);
 206
 207         header->size = cpu_to_le16(buflen);
 208         header->vpi = cpu_to_le16(0);
 209         header->vci = cpu_to_le16(0);
 210         header->type = cpu_to_le16(PKT_COMMAND);
 211
 212         prm.pid = current->pid;
 213         prm.response = NULL;
 214         prm.port = SOLOS_CHAN(atmdev);
 215
 216         spin_lock_irq(&card->param_queue_lock);
 217         list_add(&prm.list, &card->param_queue);
 218         spin_unlock_irq(&card->param_queue_lock);
 219
 220         fpga_queue(card, prm.port, skb, NULL);
 221
 222         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
 223
 224         spin_lock_irq(&card->param_queue_lock);
 225         list_del(&prm.list);
 226         spin_unlock_irq(&card->param_queue_lock);
 227
 228         if (!prm.response)
 229                 return -EIO;
 230
 231         buflen = prm.response->len;
 232         memcpy(buf, prm.response->data, buflen);
 233         kfree_skb(prm.response);
 234
 235         return buflen;
 236 }
 237
 238 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
 239                                  const char *buf, size_t count)
 240 {
 241         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 242         struct solos_card *card = atmdev->dev_data;
 243         struct solos_param prm;
 244         struct sk_buff *skb;
 245         struct pkt_hdr *header;
 246         int buflen;
 247         ssize_t ret;
 248
 249         buflen = strlen(attr->attr.name) + 11 + count;
 250
 251         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
 252         if (!skb) {
 253                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
 254                 return -ENOMEM;
 255         }
 256
 257         header = (void *)skb_put(skb, sizeof(*header));
 258
 259         buflen = snprintf((void *)&header[1], buflen - 1,
 260                           "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
 261
 262         skb_put(skb, buflen);
 263         header->size = cpu_to_le16(buflen);
 264         header->vpi = cpu_to_le16(0);
 265         header->vci = cpu_to_le16(0);
 266         header->type = cpu_to_le16(PKT_COMMAND);
 267
 268         prm.pid = current->pid;
 269         prm.response = NULL;
 270         prm.port = SOLOS_CHAN(atmdev);
 271
 272         spin_lock_irq(&card->param_queue_lock);
 273         list_add(&prm.list, &card->param_queue);
 274         spin_unlock_irq(&card->param_queue_lock);
 275
 276         fpga_queue(card, prm.port, skb, NULL);
 277
 278         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
 279
 280         spin_lock_irq(&card->param_queue_lock);
 281         list_del(&prm.list);
 282         spin_unlock_irq(&card->param_queue_lock);
 283
 284         skb = prm.response;
 285
 286         if (!skb)
 287                 return -EIO;
 288
 289         buflen = skb->len;
 290
 291         /* Sometimes it has a newline, sometimes it doesn't. */
 292         if (skb->data[buflen - 1] == '\n')
 293                 buflen--;
 294
 295         if (buflen == 2 && !strncmp(skb->data, "OK", 2))
 296                 ret = count;
 297         else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
 298                 ret = -EIO;
 299         else {
 300                 /* We know we have enough space allocated for this; we allocated
 301                    it ourselves */
 302                 skb->data[buflen] = 0;
 303
 304                 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
 305                          skb->data);
 306                 ret = -EIO;
 307         }
 308         kfree_skb(skb);
 309
 310         return ret;
 311 }
 312
 313 static char *next_string(struct sk_buff *skb)
 314 {
 315         int i = 0;
 316         char *this = skb->data;
 317
 318         for (i = 0; i < skb->len; i++) {
 319                 if (this[i] == '\n') {
 320                         this[i] = 0;
 321                         skb_pull(skb, i + 1);
 322                         return this;
 323                 }
 324                 if (!isprint(this[i]))
 325                         return NULL;
 326         }
 327         return NULL;
 328 }
 329
 330 /*
 331  * Status packet has fields separated by \n, starting with a version number
 332  * for the information therein. Fields are....
 333  *
 334  *     packet version
 335  *     RxBitRate        (version >= 1)
 336  *     TxBitRate        (version >= 1)
 337  *     State            (version >= 1)
 338  *     LocalSNRMargin   (version >= 1)
 339  *     LocalLineAttn    (version >= 1)
 340  */
 341 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
 342 {
 343         char *str, *end, *state_str, *snr, *attn;
 344         int ver, rate_up, rate_down;
 345
 346         if (!card->atmdev[port])
 347                 return -ENODEV;
 348
 349         str = next_string(skb);
 350         if (!str)
 351                 return -EIO;
 352
 353         ver = simple_strtol(str, NULL, 10);
 354         if (ver < 1) {
 355                 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
 356                          ver);
 357                 return -EIO;
 358         }
 359
 360         str = next_string(skb);
 361         if (!str)
 362                 return -EIO;
 363         if (!strcmp(str, "ERROR")) {
 364                 dev_dbg(&card->dev->dev, "Status packet indicated Solos error on port %d (starting up?)\n",
 365                          port);
 366                 return 0;
 367         }
 368
 369         rate_down = simple_strtol(str, &end, 10);
 370         if (*end)
 371                 return -EIO;
 372
 373         str = next_string(skb);
 374         if (!str)
 375                 return -EIO;
 376         rate_up = simple_strtol(str, &end, 10);
 377         if (*end)
 378                 return -EIO;
 379
 380         state_str = next_string(skb);
 381         if (!state_str)
 382                 return -EIO;
 383
 384         /* Anything but 'Showtime' is down */
 385         if (strcmp(state_str, "Showtime")) {
 386                 card->atmdev[port]->signal = ATM_PHY_SIG_LOST;
 387                 release_vccs(card->atmdev[port]);
 388                 dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
 389                 return 0;
 390         }
 391
 392         snr = next_string(skb);
 393         if (!snr)
 394                 return -EIO;
 395         attn = next_string(skb);
 396         if (!attn)
 397                 return -EIO;
 398
 399         dev_info(&card->dev->dev, "Port %d: %s @%d/%d kb/s%s%s%s%s\n",
 400                  port, state_str, rate_down/1000, rate_up/1000,
 401                  snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
 402
 403         card->atmdev[port]->link_rate = rate_down / 424;
 404         card->atmdev[port]->signal = ATM_PHY_SIG_FOUND;
 405
 406         return 0;
 407 }
 408
 409 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
 410 {
 411         struct solos_param *prm;
 412         unsigned long flags;
 413         int cmdpid;
 414         int found = 0;
 415
 416         if (skb->len < 7)
 417                 return 0;
 418
 419         if (skb->data[0] != 'L'    || !isdigit(skb->data[1]) ||
 420             !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
 421             !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
 422             skb->data[6] != '\n')
 423                 return 0;
 424
 425         cmdpid = simple_strtol(&skb->data[1], NULL, 10);
 426
 427         spin_lock_irqsave(&card->param_queue_lock, flags);
 428         list_for_each_entry(prm, &card->param_queue, list) {
 429                 if (prm->port == port && prm->pid == cmdpid) {
 430                         prm->response = skb;
 431                         skb_pull(skb, 7);
 432                         wake_up(&card->param_wq);
 433                         found = 1;
 434                         break;
 435                 }
 436         }
 437         spin_unlock_irqrestore(&card->param_queue_lock, flags);
 438         return found;
 439 }
 440
 441 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
 442                             char *buf)
 443 {
 444         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 445         struct solos_card *card = atmdev->dev_data;
 446         struct sk_buff *skb;
 447
 448         spin_lock(&card->cli_queue_lock);
 449         skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
 450         spin_unlock(&card->cli_queue_lock);
 451         if(skb == NULL)
 452                 return sprintf(buf, "No data.\n");
 453
 454         memcpy(buf, skb->data, skb->len);
 455         dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
 456
 457         kfree_skb(skb);
 458         return skb->len;
 459 }
 460
 461 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
 462 {
 463         struct sk_buff *skb;
 464         struct pkt_hdr *header;
 465
 466         if (size > (BUF_SIZE - sizeof(*header))) {
 467                 dev_dbg(&card->dev->dev, "Command is too big.  Dropping request\n");
 468                 return 0;
 469         }
 470         skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
 471         if (!skb) {
 472                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
 473                 return 0;
 474         }
 475
 476         header = (void *)skb_put(skb, sizeof(*header));
 477
 478         header->size = cpu_to_le16(size);
 479         header->vpi = cpu_to_le16(0);
 480         header->vci = cpu_to_le16(0);
 481         header->type = cpu_to_le16(PKT_COMMAND);
 482
 483         memcpy(skb_put(skb, size), buf, size);
 484
 485         fpga_queue(card, dev, skb, NULL);
 486
 487         return 0;
 488 }
 489
 490 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
 491                              const char *buf, size_t count)
 492 {
 493         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 494         struct solos_card *card = atmdev->dev_data;
 495         int err;
 496
 497         err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
 498
 499         return err?:count;
 500 }
 501
 502 static DEVICE_ATTR(console, 0644, console_show, console_store);
 503
 504
 505 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
 506 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
 507
 508 #include "solos-attrlist.c"
 509
 510 #undef SOLOS_ATTR_RO
 511 #undef SOLOS_ATTR_RW
 512
 513 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
 514 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
 515
 516 static struct attribute *solos_attrs[] = {
 517 #include "solos-attrlist.c"
 518         NULL
 519 };
 520
 521 static struct attribute_group solos_attr_group = {
 522         .attrs = solos_attrs,
 523         .name = "parameters",
 524 };
 525
 526 static int flash_upgrade(struct solos_card *card, int chip)
 527 {
 528         const struct firmware *fw;
 529         const char *fw_name;
 530         uint32_t data32 = 0;
 531         int blocksize = 0;
 532         int numblocks = 0;
 533         int offset;
 534
 535         switch (chip) {
 536         case 0:
 537                 fw_name = "solos-FPGA.bin";
 538                 blocksize = FPGA_BLOCK;
 539                 break;
 540         case 1:
 541                 fw_name = "solos-Firmware.bin";
 542                 blocksize = SOLOS_BLOCK;
 543                 break;
 544         case 2:
 545                 if (card->fpga_version > LEGACY_BUFFERS){
 546                         fw_name = "solos-db-FPGA.bin";
 547                         blocksize = FPGA_BLOCK;
 548                 } else {
 549                         dev_info(&card->dev->dev, "FPGA version doesn't support"
 550                                         " daughter board upgrades\n");
 551                         return -EPERM;
 552                 }
 553                 break;
 554         case 3:
 555                 if (card->fpga_version > LEGACY_BUFFERS){
 556                         fw_name = "solos-Firmware.bin";
 557                         blocksize = SOLOS_BLOCK;
 558                 } else {
 559                         dev_info(&card->dev->dev, "FPGA version doesn't support"
 560                                         " daughter board upgrades\n");
 561                         return -EPERM;
 562                 }
 563                 break;
 564         default:
 565                 return -ENODEV;
 566         }
 567
 568         if (request_firmware(&fw, fw_name, &card->dev->dev))
 569                 return -ENOENT;
 570
 571         dev_info(&card->dev->dev, "Flash upgrade starting\n");
 572
 573         numblocks = fw->size / blocksize;
 574         dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
 575         dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
 576
 577         dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
 578         iowrite32(1, card->config_regs + FPGA_MODE);
 579         data32 = ioread32(card->config_regs + FPGA_MODE);
 580
 581         /* Set mode to Chip Erase */
 582         if(chip == 0 || chip == 2)
 583                 dev_info(&card->dev->dev, "Set FPGA Flash mode to FPGA Chip Erase\n");
 584         if(chip == 1 || chip == 3)
 585                 dev_info(&card->dev->dev, "Set FPGA Flash mode to Solos Chip Erase\n");
 586         iowrite32((chip * 2), card->config_regs + FLASH_MODE);
 587
 588
 589         iowrite32(1, card->config_regs + WRITE_FLASH);
 590         wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
 591
 592         for (offset = 0; offset < fw->size; offset += blocksize) {
 593                 int i;
 594
 595                 /* Clear write flag */
 596                 iowrite32(0, card->config_regs + WRITE_FLASH);
 597
 598                 /* Set mode to Block Write */
 599                 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
 600                 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
 601
 602                 /* Copy block to buffer, swapping each 16 bits */
 603                 for(i = 0; i < blocksize; i += 4) {
 604                         uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
 605                         if(card->fpga_version > LEGACY_BUFFERS)
 606                                 iowrite32(word, FLASH_BUF + i);
 607                         else
 608                                 iowrite32(word, RX_BUF(card, 3) + i);
 609                 }
 610
 611                 /* Specify block number and then trigger flash write */
 612                 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
 613                 iowrite32(1, card->config_regs + WRITE_FLASH);
 614                 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
 615         }
 616
 617         release_firmware(fw);
 618         iowrite32(0, card->config_regs + WRITE_FLASH);
 619         iowrite32(0, card->config_regs + FPGA_MODE);
 620         iowrite32(0, card->config_regs + FLASH_MODE);
 621         dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
 622         return 0;
 623 }
 624
 625 static irqreturn_t solos_irq(int irq, void *dev_id)
 626 {
 627         struct solos_card *card = dev_id;
 628         int handled = 1;
 629
 630         iowrite32(0, card->config_regs + IRQ_CLEAR);
 631
 632         /* If we're up and running, just kick the tasklet to process TX/RX */
 633         if (card->atmdev[0])
 634                 tasklet_schedule(&card->tlet);
 635         else
 636                 wake_up(&card->fw_wq);
 637
 638         return IRQ_RETVAL(handled);
 639 }
 640
 641 void solos_bh(unsigned long card_arg)
 642 {
 643         struct solos_card *card = (void *)card_arg;
 644         uint32_t card_flags;
 645         uint32_t rx_done = 0;
 646         int port;
 647
 648         /*
 649          * Since fpga_tx() is going to need to read the flags under its lock,
 650          * it can return them to us so that we don't have to hit PCI MMIO
 651          * again for the same information
 652          */
 653         card_flags = fpga_tx(card);
 654
 655         for (port = 0; port < card->nr_ports; port++) {
 656                 if (card_flags & (0x10 << port)) {
 657                         struct pkt_hdr _hdr, *header;
 658                         struct sk_buff *skb;
 659                         struct atm_vcc *vcc;
 660                         int size;
 661
 662                         if (card->using_dma) {
 663                                 skb = card->rx_skb[port];
 664                                 card->rx_skb[port] = NULL;
 665
 666                                 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
 667                                                  RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
 668
 669                                 header = (void *)skb->data;
 670                                 size = le16_to_cpu(header->size);
 671                                 skb_put(skb, size + sizeof(*header));
 672                                 skb_pull(skb, sizeof(*header));
 673                         } else {
 674                                 header = &_hdr;
 675
 676                                 rx_done |= 0x10 << port;
 677
 678                                 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
 679
 680                                 size = le16_to_cpu(header->size);
 681                                 if (size > (card->buffer_size - sizeof(*header))){
 682                                         dev_warn(&card->dev->dev, "Invalid buffer size\n");
 683                                         continue;
 684                                 }
 685
 686                                 skb = alloc_skb(size + 1, GFP_ATOMIC);
 687                                 if (!skb) {
 688                                         if (net_ratelimit())
 689                                                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
 690                                         continue;
 691                                 }
 692
 693                                 memcpy_fromio(skb_put(skb, size),
 694                                               RX_BUF(card, port) + sizeof(*header),
 695                                               size);
 696                         }
 697                         if (atmdebug) {
 698                                 dev_info(&card->dev->dev, "Received: device %d\n", port);
 699                                 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
 700                                          size, le16_to_cpu(header->vpi),
 701                                          le16_to_cpu(header->vci));
 702                                 print_buffer(skb);
 703                         }
 704
 705                         switch (le16_to_cpu(header->type)) {
 706                         case PKT_DATA:
 707                                 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
 708                                                le16_to_cpu(header->vci));
 709                                 if (!vcc) {
 710                                         if (net_ratelimit())
 711                                                 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
 712                                                          le16_to_cpu(header->vci), le16_to_cpu(header->vpi),
 713                                                          port);
 714                                         continue;
 715                                 }
 716                                 atm_charge(vcc, skb->truesize);
 717                                 vcc->push(vcc, skb);
 718                                 atomic_inc(&vcc->stats->rx);
 719                                 break;
 720
 721                         case PKT_STATUS:
 722                                 if (process_status(card, port, skb) &&
 723                                     net_ratelimit()) {
 724                                         dev_warn(&card->dev->dev, "Bad status packet of %d bytes on port %d:\n", skb->len, port);
 725                                         print_buffer(skb);
 726                                 }
 727                                 dev_kfree_skb_any(skb);
 728                                 break;
 729
 730                         case PKT_COMMAND:
 731                         default: /* FIXME: Not really, surely? */
 732                                 if (process_command(card, port, skb))
 733                                         break;
 734                                 spin_lock(&card->cli_queue_lock);
 735                                 if (skb_queue_len(&card->cli_queue[port]) > 10) {
 736                                         if (net_ratelimit())
 737                                                 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
 738                                                          port);
 739                                         dev_kfree_skb_any(skb);
 740                                 } else
 741                                         skb_queue_tail(&card->cli_queue[port], skb);
 742                                 spin_unlock(&card->cli_queue_lock);
 743                                 break;
 744                         }
 745                 }
 746                 /* Allocate RX skbs for any ports which need them */
 747                 if (card->using_dma && card->atmdev[port] &&
 748                     !card->rx_skb[port]) {
 749                         struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
 750                         if (skb) {
 751                                 SKB_CB(skb)->dma_addr =
 752                                         pci_map_single(card->dev, skb->data,
 753                                                        RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
 754                                 iowrite32(SKB_CB(skb)->dma_addr,
 755                                           card->config_regs + RX_DMA_ADDR(port));
 756                                 card->rx_skb[port] = skb;
 757                         } else {
 758                                 if (net_ratelimit())
 759                                         dev_warn(&card->dev->dev, "Failed to allocate RX skb");
 760
 761                                 /* We'll have to try again later */
 762                                 tasklet_schedule(&card->tlet);
 763                         }
 764                 }
 765         }
 766         if (rx_done)
 767                 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
 768
 769         return;
 770 }
 771
 772 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
 773 {
 774         struct hlist_head *head;
 775         struct atm_vcc *vcc = NULL;
 776         struct hlist_node *node;
 777         struct sock *s;
 778
 779         read_lock(&vcc_sklist_lock);
 780         head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
 781         sk_for_each(s, node, head) {
 782                 vcc = atm_sk(s);
 783                 if (vcc->dev == dev && vcc->vci == vci &&
 784                     vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
 785                         goto out;
 786         }
 787         vcc = NULL;
 788  out:
 789         read_unlock(&vcc_sklist_lock);
 790         return vcc;
 791 }
 792
 793 static int list_vccs(int vci)
 794 {
 795         struct hlist_head *head;
 796         struct atm_vcc *vcc;
 797         struct hlist_node *node;
 798         struct sock *s;
 799         int num_found = 0;
 800         int i;
 801
 802         read_lock(&vcc_sklist_lock);
 803         if (vci != 0){
 804                 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
 805                 sk_for_each(s, node, head) {
 806                         num_found ++;
 807                         vcc = atm_sk(s);
 808                         printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
 809                                vcc->dev->number,
 810                                vcc->vpi,
 811                                vcc->vci);
 812                 }
 813         } else {
 814                 for(i = 0; i < VCC_HTABLE_SIZE; i++){
 815                         head = &vcc_hash[i];
 816                         sk_for_each(s, node, head) {
 817                                 num_found ++;
 818                                 vcc = atm_sk(s);
 819                                 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
 820                                        vcc->dev->number,
 821                                        vcc->vpi,
 822                                        vcc->vci);
 823                         }
 824                 }
 825         }
 826         read_unlock(&vcc_sklist_lock);
 827         return num_found;
 828 }
 829
 830 static void release_vccs(struct atm_dev *dev)
 831 {
 832         int i;
 833
 834         write_lock_irq(&vcc_sklist_lock);
 835         for (i = 0; i < VCC_HTABLE_SIZE; i++) {
 836                 struct hlist_head *head = &vcc_hash[i];
 837                 struct hlist_node *node, *tmp;
 838                 struct sock *s;
 839                 struct atm_vcc *vcc;
 840
 841                 sk_for_each_safe(s, node, tmp, head) {
 842                         vcc = atm_sk(s);
 843                         if (vcc->dev == dev) {
 844                                 vcc_release_async(vcc, -EPIPE);
 845                                 sk_del_node_init(s);
 846                         }
 847                 }
 848         }
 849         write_unlock_irq(&vcc_sklist_lock);
 850 }
 851
 852
 853 static int popen(struct atm_vcc *vcc)
 854 {
 855         struct solos_card *card = vcc->dev->dev_data;
 856         struct sk_buff *skb;
 857         struct pkt_hdr *header;
 858
 859         if (vcc->qos.aal != ATM_AAL5) {
 860                 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
 861                          vcc->qos.aal);
 862                 return -EINVAL;
 863         }
 864
 865         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
 866         if (!skb && net_ratelimit()) {
 867                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
 868                 return -ENOMEM;
 869         }
 870         header = (void *)skb_put(skb, sizeof(*header));
 871
 872         header->size = cpu_to_le16(0);
 873         header->vpi = cpu_to_le16(vcc->vpi);
 874         header->vci = cpu_to_le16(vcc->vci);
 875         header->type = cpu_to_le16(PKT_POPEN);
 876
 877         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
 878
 879         set_bit(ATM_VF_ADDR, &vcc->flags);
 880         set_bit(ATM_VF_READY, &vcc->flags);
 881         list_vccs(0);
 882
 883
 884         return 0;
 885 }
 886
 887 static void pclose(struct atm_vcc *vcc)
 888 {
 889         struct solos_card *card = vcc->dev->dev_data;
 890         struct sk_buff *skb;
 891         struct pkt_hdr *header;
 892
 893         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
 894         if (!skb) {
 895                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
 896                 return;
 897         }
 898         header = (void *)skb_put(skb, sizeof(*header));
 899
 900         header->size = cpu_to_le16(0);
 901         header->vpi = cpu_to_le16(vcc->vpi);
 902         header->vci = cpu_to_le16(vcc->vci);
 903         header->type = cpu_to_le16(PKT_PCLOSE);
 904
 905         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
 906
 907         clear_bit(ATM_VF_ADDR, &vcc->flags);
 908         clear_bit(ATM_VF_READY, &vcc->flags);
 909
 910         return;
 911 }
 912
 913 static int print_buffer(struct sk_buff *buf)
 914 {
 915         int len,i;
 916         char msg[500];
 917         char item[10];
 918
 919         len = buf->len;
 920         for (i = 0; i < len; i++){
 921                 if(i % 8 == 0)
 922                         sprintf(msg, "%02X: ", i);
 923
 924                 sprintf(item,"%02X ",*(buf->data + i));
 925                 strcat(msg, item);
 926                 if(i % 8 == 7) {
 927                         sprintf(item, "\n");
 928                         strcat(msg, item);
 929                         printk(KERN_DEBUG "%s", msg);
 930                 }
 931         }
 932         if (i % 8 != 0) {
 933                 sprintf(item, "\n");
 934                 strcat(msg, item);
 935                 printk(KERN_DEBUG "%s", msg);
 936         }
 937         printk(KERN_DEBUG "\n");
 938
 939         return 0;
 940 }
 941
 942 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
 943                        struct atm_vcc *vcc)
 944 {
 945         int old_len;
 946         unsigned long flags;
 947
 948         SKB_CB(skb)->vcc = vcc;
 949
 950         spin_lock_irqsave(&card->tx_queue_lock, flags);
 951         old_len = skb_queue_len(&card->tx_queue[port]);
 952         skb_queue_tail(&card->tx_queue[port], skb);
 953         if (!old_len)
 954                 card->tx_mask |= (1 << port);
 955         spin_unlock_irqrestore(&card->tx_queue_lock, flags);
 956
 957         /* Theoretically we could just schedule the tasklet here, but
 958            that introduces latency we don't want -- it's noticeable */
 959         if (!old_len)
 960                 fpga_tx(card);
 961 }
 962
 963 static uint32_t fpga_tx(struct solos_card *card)
 964 {
 965         uint32_t tx_pending, card_flags;
 966         uint32_t tx_started = 0;
 967         struct sk_buff *skb;
 968         struct atm_vcc *vcc;
 969         unsigned char port;
 970         unsigned long flags;
 971
 972         spin_lock_irqsave(&card->tx_lock, flags);
 973
 974         card_flags = ioread32(card->config_regs + FLAGS_ADDR);
 975         /*
 976          * The queue lock is required for _writing_ to tx_mask, but we're
 977          * OK to read it here without locking. The only potential update
 978          * that we could race with is in fpga_queue() where it sets a bit
 979          * for a new port... but it's going to call this function again if
 980          * it's doing that, anyway.
 981          */
 982         tx_pending = card->tx_mask & ~card_flags;
 983
 984         for (port = 0; tx_pending; tx_pending >>= 1, port++) {
 985                 if (tx_pending & 1) {
 986                         struct sk_buff *oldskb = card->tx_skb[port];
 987                         if (oldskb)
 988                                 pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
 989                                                  oldskb->len, PCI_DMA_TODEVICE);
 990
 991                         spin_lock(&card->tx_queue_lock);
 992                         skb = skb_dequeue(&card->tx_queue[port]);
 993                         if (!skb)
 994                                 card->tx_mask &= ~(1 << port);
 995                         spin_unlock(&card->tx_queue_lock);
 996
 997                         if (skb && !card->using_dma) {
 998                                 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
 999                                 tx_started |= 1 << port;
1000                                 oldskb = skb; /* We're done with this skb already */
1001                         } else if (skb && card->using_dma) {
1002                                 SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
1003                                                                        skb->len, PCI_DMA_TODEVICE);
1004                                 iowrite32(SKB_CB(skb)->dma_addr,
1005                                           card->config_regs + TX_DMA_ADDR(port));
1006                         }
1007
1008                         if (!oldskb)
1009                                 continue;
1010
1011                         /* Clean up and free oldskb now it's gone */
1012                         if (atmdebug) {
1013                                 dev_info(&card->dev->dev, "Transmitted: port %d\n",
1014                                          port);
1015                                 print_buffer(oldskb);
1016                         }
1017
1018                         vcc = SKB_CB(oldskb)->vcc;
1019
1020                         if (vcc) {
1021                                 atomic_inc(&vcc->stats->tx);
1022                                 solos_pop(vcc, oldskb);
1023                         } else
1024                                 dev_kfree_skb_irq(oldskb);
1025
1026                 }
1027         }
1028         /* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
1029         if (tx_started)
1030                 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
1031
1032         spin_unlock_irqrestore(&card->tx_lock, flags);
1033         return card_flags;
1034 }
1035
1036 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
1037 {
1038         struct solos_card *card = vcc->dev->dev_data;
1039         struct pkt_hdr *header;
1040         int pktlen;
1041
1042         pktlen = skb->len;
1043         if (pktlen > (BUF_SIZE - sizeof(*header))) {
1044                 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
1045                 solos_pop(vcc, skb);
1046                 return 0;
1047         }
1048
1049         if (!skb_clone_writable(skb, sizeof(*header))) {
1050                 int expand_by = 0;
1051                 int ret;
1052
1053                 if (skb_headroom(skb) < sizeof(*header))
1054                         expand_by = sizeof(*header) - skb_headroom(skb);
1055
1056                 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1057                 if (ret) {
1058                         dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1059                         solos_pop(vcc, skb);
1060                         return ret;
1061                 }
1062         }
1063
1064         header = (void *)skb_push(skb, sizeof(*header));
1065
1066         /* This does _not_ include the size of the header */
1067         header->size = cpu_to_le16(pktlen);
1068         header->vpi = cpu_to_le16(vcc->vpi);
1069         header->vci = cpu_to_le16(vcc->vci);
1070         header->type = cpu_to_le16(PKT_DATA);
1071
1072         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1073
1074         return 0;
1075 }
1076
1077 static struct atmdev_ops fpga_ops = {
1078         .open =         popen,
1079         .close =        pclose,
1080         .ioctl =        NULL,
1081         .getsockopt =   NULL,
1082         .setsockopt =   NULL,
1083         .send =         psend,
1084         .send_oam =     NULL,
1085         .phy_put =      NULL,
1086         .phy_get =      NULL,
1087         .change_qos =   NULL,
1088         .proc_read =    NULL,
1089         .owner =        THIS_MODULE
1090 };
1091
1092 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1093 {
1094         int err;
1095         uint16_t fpga_ver;
1096         uint8_t major_ver, minor_ver;
1097         uint32_t data32;
1098         struct solos_card *card;
1099
1100         card = kzalloc(sizeof(*card), GFP_KERNEL);
1101         if (!card)
1102                 return -ENOMEM;
1103
1104         card->dev = dev;
1105         init_waitqueue_head(&card->fw_wq);
1106         init_waitqueue_head(&card->param_wq);
1107
1108         err = pci_enable_device(dev);
1109         if (err) {
1110                 dev_warn(&dev->dev,  "Failed to enable PCI device\n");
1111                 goto out;
1112         }
1113
1114         err = pci_set_dma_mask(dev, DMA_BIT_MASK(32));
1115         if (err) {
1116                 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1117                 goto out;
1118         }
1119
1120         err = pci_request_regions(dev, "solos");
1121         if (err) {
1122                 dev_warn(&dev->dev, "Failed to request regions\n");
1123                 goto out;
1124         }
1125
1126         card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1127         if (!card->config_regs) {
1128                 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1129                 goto out_release_regions;
1130         }
1131         card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1132         if (!card->buffers) {
1133                 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1134                 goto out_unmap_config;
1135         }
1136
1137         if (reset) {
1138                 iowrite32(1, card->config_regs + FPGA_MODE);
1139                 data32 = ioread32(card->config_regs + FPGA_MODE);
1140
1141                 iowrite32(0, card->config_regs + FPGA_MODE);
1142                 data32 = ioread32(card->config_regs + FPGA_MODE);
1143         }
1144
1145         data32 = ioread32(card->config_regs + FPGA_VER);
1146         fpga_ver = (data32 & 0x0000FFFF);
1147         major_ver = ((data32 & 0xFF000000) >> 24);
1148         minor_ver = ((data32 & 0x00FF0000) >> 16);
1149         card->fpga_version = FPGA_VERSION(major_ver,minor_ver);
1150         if (card->fpga_version > LEGACY_BUFFERS)
1151                 card->buffer_size = BUF_SIZE;
1152         else
1153                 card->buffer_size = OLD_BUF_SIZE;
1154         dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1155                  major_ver, minor_ver, fpga_ver);
1156
1157         if (card->fpga_version >= DMA_SUPPORTED){
1158                 card->using_dma = 1;
1159         } else {
1160                 card->using_dma = 0;
1161                 /* Set RX empty flag for all ports */
1162                 iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1163         }
1164
1165         data32 = ioread32(card->config_regs + PORTS);
1166         card->nr_ports = (data32 & 0x000000FF);
1167
1168         pci_set_drvdata(dev, card);
1169
1170         tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1171         spin_lock_init(&card->tx_lock);
1172         spin_lock_init(&card->tx_queue_lock);
1173         spin_lock_init(&card->cli_queue_lock);
1174         spin_lock_init(&card->param_queue_lock);
1175         INIT_LIST_HEAD(&card->param_queue);
1176
1177         err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1178                           "solos-pci", card);
1179         if (err) {
1180                 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1181                 goto out_unmap_both;
1182         }
1183
1184         iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1185
1186         if (fpga_upgrade)
1187                 flash_upgrade(card, 0);
1188
1189         if (firmware_upgrade)
1190                 flash_upgrade(card, 1);
1191
1192         if (db_fpga_upgrade)
1193                 flash_upgrade(card, 2);
1194
1195         if (db_firmware_upgrade)
1196                 flash_upgrade(card, 3);
1197
1198         err = atm_init(card);
1199         if (err)
1200                 goto out_free_irq;
1201
1202         return 0;
1203
1204  out_free_irq:
1205         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1206         free_irq(dev->irq, card);
1207         tasklet_kill(&card->tlet);
1208
1209  out_unmap_both:
1210         pci_set_drvdata(dev, NULL);
1211         pci_iounmap(dev, card->config_regs);
1212  out_unmap_config:
1213         pci_iounmap(dev, card->buffers);
1214  out_release_regions:
1215         pci_release_regions(dev);
1216  out:
1217         kfree(card);
1218         return err;
1219 }
1220
1221 static int atm_init(struct solos_card *card)
1222 {
1223         int i;
1224
1225         for (i = 0; i < card->nr_ports; i++) {
1226                 struct sk_buff *skb;
1227                 struct pkt_hdr *header;
1228
1229                 skb_queue_head_init(&card->tx_queue[i]);
1230                 skb_queue_head_init(&card->cli_queue[i]);
1231
1232                 card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
1233                 if (!card->atmdev[i]) {
1234                         dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1235                         atm_remove(card);
1236                         return -ENODEV;
1237                 }
1238                 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1239                         dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1240                 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1241                         dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1242
1243                 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1244
1245                 card->atmdev[i]->ci_range.vpi_bits = 8;
1246                 card->atmdev[i]->ci_range.vci_bits = 16;
1247                 card->atmdev[i]->dev_data = card;
1248                 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1249                 card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
1250
1251                 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1252                 if (!skb) {
1253                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1254                         continue;
1255                 }
1256
1257                 header = (void *)skb_put(skb, sizeof(*header));
1258
1259                 header->size = cpu_to_le16(0);
1260                 header->vpi = cpu_to_le16(0);
1261                 header->vci = cpu_to_le16(0);
1262                 header->type = cpu_to_le16(PKT_STATUS);
1263
1264                 fpga_queue(card, i, skb, NULL);
1265         }
1266         return 0;
1267 }
1268
1269 static void atm_remove(struct solos_card *card)
1270 {
1271         int i;
1272
1273         for (i = 0; i < card->nr_ports; i++) {
1274                 if (card->atmdev[i]) {
1275                         struct sk_buff *skb;
1276
1277                         dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1278
1279                         sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1280                         atm_dev_deregister(card->atmdev[i]);
1281
1282                         skb = card->rx_skb[i];
1283                         if (skb) {
1284                                 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
1285                                                  RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
1286                                 dev_kfree_skb(skb);
1287                         }
1288                         skb = card->tx_skb[i];
1289                         if (skb) {
1290                                 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
1291                                                  skb->len, PCI_DMA_TODEVICE);
1292                                 dev_kfree_skb(skb);
1293                         }
1294                         while ((skb = skb_dequeue(&card->tx_queue[i])))
1295                                 dev_kfree_skb(skb);
1296
1297                 }
1298         }
1299 }
1300
1301 static void fpga_remove(struct pci_dev *dev)
1302 {
1303         struct solos_card *card = pci_get_drvdata(dev);
1304
1305         /* Disable IRQs */
1306         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1307
1308         /* Reset FPGA */
1309         iowrite32(1, card->config_regs + FPGA_MODE);
1310         (void)ioread32(card->config_regs + FPGA_MODE);
1311
1312         atm_remove(card);
1313
1314         free_irq(dev->irq, card);
1315         tasklet_kill(&card->tlet);
1316
1317         /* Release device from reset */
1318         iowrite32(0, card->config_regs + FPGA_MODE);
1319         (void)ioread32(card->config_regs + FPGA_MODE);
1320
1321         pci_iounmap(dev, card->buffers);
1322         pci_iounmap(dev, card->config_regs);
1323
1324         pci_release_regions(dev);
1325         pci_disable_device(dev);
1326
1327         pci_set_drvdata(dev, NULL);
1328         kfree(card);
1329 }
1330
1331 static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
1332         { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1333         { 0, }
1334 };
1335
1336 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1337
1338 static struct pci_driver fpga_driver = {
1339         .name =         "solos",
1340         .id_table =     fpga_pci_tbl,
1341         .probe =        fpga_probe,
1342         .remove =       fpga_remove,
1343 };
1344
1345
1346 static int __init solos_pci_init(void)
1347 {
1348         printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1349         return pci_register_driver(&fpga_driver);
1350 }
1351
1352 static void __exit solos_pci_exit(void)
1353 {
1354         pci_unregister_driver(&fpga_driver);
1355         printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1356 }
1357
1358 module_init(solos_pci_init);
1359 module_exit(solos_pci_exit);