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