git.oblomov.eu Git - linux-2.6/blob - 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
  59 #define DATA_RAM_SIZE   32768
  60 #define BUF_SIZE        4096
  61 #define FPGA_PAGE       528 /* FPGA flash page size*/
  62 #define SOLOS_PAGE      512 /* Solos flash page size*/
  63 #define FPGA_BLOCK      (FPGA_PAGE * 8) /* FPGA flash block size*/
  64 #define SOLOS_BLOCK     (SOLOS_PAGE * 8) /* Solos flash block size*/
  65
  66 #define RX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2)
  67 #define TX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2 + BUF_SIZE)
  68
  69 static int debug = 0;
  70 static int atmdebug = 0;
  71 static int firmware_upgrade = 0;
  72 static int fpga_upgrade = 0;
  73
  74 struct pkt_hdr {
  75         __le16 size;
  76         __le16 vpi;
  77         __le16 vci;
  78         __le16 type;
  79 };
  80
  81 #define PKT_DATA        0
  82 #define PKT_COMMAND     1
  83 #define PKT_POPEN       3
  84 #define PKT_PCLOSE      4
  85 #define PKT_STATUS      5
  86
  87 struct solos_card {
  88         void __iomem *config_regs;
  89         void __iomem *buffers;
  90         int nr_ports;
  91         struct pci_dev *dev;
  92         struct atm_dev *atmdev[4];
  93         struct tasklet_struct tlet;
  94         spinlock_t tx_lock;
  95         spinlock_t tx_queue_lock;
  96         spinlock_t cli_queue_lock;
  97         spinlock_t param_queue_lock;
  98         struct list_head param_queue;
  99         struct sk_buff_head tx_queue[4];
 100         struct sk_buff_head cli_queue[4];
 101         wait_queue_head_t param_wq;
 102         wait_queue_head_t fw_wq;
 103 };
 104
 105
 106 struct solos_param {
 107         struct list_head list;
 108         pid_t pid;
 109         int port;
 110         struct sk_buff *response;
 111         wait_queue_head_t wq;
 112 };
 113
 114 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
 115
 116 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
 117 MODULE_DESCRIPTION("Solos PCI driver");
 118 MODULE_VERSION(VERSION);
 119 MODULE_LICENSE("GPL");
 120 MODULE_PARM_DESC(debug, "Enable Loopback");
 121 MODULE_PARM_DESC(atmdebug, "Print ATM data");
 122 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
 123 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
 124 module_param(debug, int, 0444);
 125 module_param(atmdebug, int, 0644);
 126 module_param(firmware_upgrade, int, 0444);
 127 module_param(fpga_upgrade, int, 0444);
 128
 129 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
 130                        struct atm_vcc *vcc);
 131 static int fpga_tx(struct solos_card *);
 132 static irqreturn_t solos_irq(int irq, void *dev_id);
 133 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
 134 static int list_vccs(int vci);
 135 static void release_vccs(struct atm_dev *dev);
 136 static int atm_init(struct solos_card *);
 137 static void atm_remove(struct solos_card *);
 138 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
 139 static void solos_bh(unsigned long);
 140 static int print_buffer(struct sk_buff *buf);
 141
 142 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
 143 {
 144         if (vcc->pop)
 145                 vcc->pop(vcc, skb);
 146         else
 147                 dev_kfree_skb_any(skb);
 148 }
 149
 150 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
 151                                 char *buf)
 152 {
 153         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 154         struct solos_card *card = atmdev->dev_data;
 155         struct solos_param prm;
 156         struct sk_buff *skb;
 157         struct pkt_hdr *header;
 158         int buflen;
 159
 160         buflen = strlen(attr->attr.name) + 10;
 161
 162         skb = alloc_skb(buflen, GFP_KERNEL);
 163         if (!skb) {
 164                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
 165                 return -ENOMEM;
 166         }
 167
 168         header = (void *)skb_put(skb, sizeof(*header));
 169
 170         buflen = snprintf((void *)&header[1], buflen - 1,
 171                           "L%05d\n%s\n", current->pid, attr->attr.name);
 172         skb_put(skb, buflen);
 173
 174         header->size = cpu_to_le16(buflen);
 175         header->vpi = cpu_to_le16(0);
 176         header->vci = cpu_to_le16(0);
 177         header->type = cpu_to_le16(PKT_COMMAND);
 178
 179         prm.pid = current->pid;
 180         prm.response = NULL;
 181         prm.port = SOLOS_CHAN(atmdev);
 182
 183         spin_lock_irq(&card->param_queue_lock);
 184         list_add(&prm.list, &card->param_queue);
 185         spin_unlock_irq(&card->param_queue_lock);
 186
 187         fpga_queue(card, prm.port, skb, NULL);
 188
 189         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
 190
 191         spin_lock_irq(&card->param_queue_lock);
 192         list_del(&prm.list);
 193         spin_unlock_irq(&card->param_queue_lock);
 194
 195         if (!prm.response)
 196                 return -EIO;
 197
 198         buflen = prm.response->len;
 199         memcpy(buf, prm.response->data, buflen);
 200         kfree_skb(prm.response);
 201
 202         return buflen;
 203 }
 204
 205 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
 206                                  const char *buf, size_t count)
 207 {
 208         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 209         struct solos_card *card = atmdev->dev_data;
 210         struct solos_param prm;
 211         struct sk_buff *skb;
 212         struct pkt_hdr *header;
 213         int buflen;
 214         ssize_t ret;
 215
 216         buflen = strlen(attr->attr.name) + 11 + count;
 217
 218         skb = alloc_skb(buflen, GFP_KERNEL);
 219         if (!skb) {
 220                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
 221                 return -ENOMEM;
 222         }
 223
 224         header = (void *)skb_put(skb, sizeof(*header));
 225
 226         buflen = snprintf((void *)&header[1], buflen - 1,
 227                           "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
 228
 229         skb_put(skb, buflen);
 230         header->size = cpu_to_le16(buflen);
 231         header->vpi = cpu_to_le16(0);
 232         header->vci = cpu_to_le16(0);
 233         header->type = cpu_to_le16(PKT_COMMAND);
 234
 235         prm.pid = current->pid;
 236         prm.response = NULL;
 237         prm.port = SOLOS_CHAN(atmdev);
 238
 239         spin_lock_irq(&card->param_queue_lock);
 240         list_add(&prm.list, &card->param_queue);
 241         spin_unlock_irq(&card->param_queue_lock);
 242
 243         fpga_queue(card, prm.port, skb, NULL);
 244
 245         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
 246
 247         spin_lock_irq(&card->param_queue_lock);
 248         list_del(&prm.list);
 249         spin_unlock_irq(&card->param_queue_lock);
 250
 251         skb = prm.response;
 252
 253         if (!skb)
 254                 return -EIO;
 255
 256         buflen = skb->len;
 257
 258         /* Sometimes it has a newline, sometimes it doesn't. */
 259         if (skb->data[buflen - 1] == '\n')
 260                 buflen--;
 261
 262         if (buflen == 2 && !strncmp(skb->data, "OK", 2))
 263                 ret = count;
 264         else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
 265                 ret = -EIO;
 266         else {
 267                 /* We know we have enough space allocated for this; we allocated
 268                    it ourselves */
 269                 skb->data[buflen] = 0;
 270
 271                 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
 272                          skb->data);
 273                 ret = -EIO;
 274         }
 275         kfree_skb(skb);
 276
 277         return ret;
 278 }
 279
 280 static char *next_string(struct sk_buff *skb)
 281 {
 282         int i = 0;
 283         char *this = skb->data;
 284
 285         while (i < skb->len) {
 286                 if (this[i] == '\n') {
 287                         this[i] = 0;
 288                         skb_pull(skb, i);
 289                         return this;
 290                 }
 291         }
 292         return NULL;
 293 }
 294
 295 /*
 296  * Status packet has fields separated by \n, starting with a version number
 297  * for the information therein. Fields are....
 298  *
 299  *     packet version
 300  *     TxBitRate        (version >= 1)
 301  *     RxBitRate        (version >= 1)
 302  *     State            (version >= 1)
 303  */
 304 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
 305 {
 306         char *str, *end;
 307         int ver, rate_up, rate_down, state;
 308
 309         if (!card->atmdev[port])
 310                 return -ENODEV;
 311
 312         str = next_string(skb);
 313         if (!str)
 314                 return -EIO;
 315
 316         ver = simple_strtol(str, NULL, 10);
 317         if (ver < 1) {
 318                 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
 319                          ver);
 320                 return -EIO;
 321         }
 322
 323         str = next_string(skb);
 324         rate_up = simple_strtol(str, &end, 10);
 325         if (*end)
 326                 return -EIO;
 327
 328         str = next_string(skb);
 329         rate_down = simple_strtol(str, &end, 10);
 330         if (*end)
 331                 return -EIO;
 332
 333         str = next_string(skb);
 334         if (!strcmp(str, "Showtime"))
 335                 state = ATM_PHY_SIG_FOUND;
 336         else {
 337                 state = ATM_PHY_SIG_LOST;
 338                 release_vccs(card->atmdev[port]);
 339         }
 340
 341         card->atmdev[port]->link_rate = rate_down;
 342         card->atmdev[port]->signal = state;
 343
 344         dev_info(&card->dev->dev, "ATM state: '%s', %d/%d kb/s up/down.\n",
 345                  str, rate_up/1000, rate_down/1000);
 346         return 0;
 347 }
 348
 349 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
 350 {
 351         struct solos_param *prm;
 352         unsigned long flags;
 353         int cmdpid;
 354         int found = 0;
 355
 356         if (skb->len < 7)
 357                 return 0;
 358
 359         if (skb->data[0] != 'L'    || !isdigit(skb->data[1]) ||
 360             !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
 361             !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
 362             skb->data[6] != '\n')
 363                 return 0;
 364
 365         cmdpid = simple_strtol(&skb->data[1], NULL, 10);
 366
 367         spin_lock_irqsave(&card->param_queue_lock, flags);
 368         list_for_each_entry(prm, &card->param_queue, list) {
 369                 if (prm->port == port && prm->pid == cmdpid) {
 370                         prm->response = skb;
 371                         skb_pull(skb, 7);
 372                         wake_up(&card->param_wq);
 373                         found = 1;
 374                         break;
 375                 }
 376         }
 377         spin_unlock_irqrestore(&card->param_queue_lock, flags);
 378         return found;
 379 }
 380
 381 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
 382                             char *buf)
 383 {
 384         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 385         struct solos_card *card = atmdev->dev_data;
 386         struct sk_buff *skb;
 387
 388         spin_lock(&card->cli_queue_lock);
 389         skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
 390         spin_unlock(&card->cli_queue_lock);
 391         if(skb == NULL)
 392                 return sprintf(buf, "No data.\n");
 393
 394         memcpy(buf, skb->data, skb->len);
 395         dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
 396
 397         kfree_skb(skb);
 398         return skb->len;
 399 }
 400
 401 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
 402 {
 403         struct sk_buff *skb;
 404         struct pkt_hdr *header;
 405
 406 //      dev_dbg(&card->dev->dev, "size: %d\n", size);
 407
 408         if (size > (BUF_SIZE - sizeof(*header))) {
 409                 dev_dbg(&card->dev->dev, "Command is too big.  Dropping request\n");
 410                 return 0;
 411         }
 412         skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
 413         if (!skb) {
 414                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
 415                 return 0;
 416         }
 417
 418         header = (void *)skb_put(skb, sizeof(*header));
 419
 420         header->size = cpu_to_le16(size);
 421         header->vpi = cpu_to_le16(0);
 422         header->vci = cpu_to_le16(0);
 423         header->type = cpu_to_le16(PKT_COMMAND);
 424
 425         memcpy(skb_put(skb, size), buf, size);
 426
 427         fpga_queue(card, dev, skb, NULL);
 428
 429         return 0;
 430 }
 431
 432 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
 433                              const char *buf, size_t count)
 434 {
 435         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 436         struct solos_card *card = atmdev->dev_data;
 437         int err;
 438
 439         err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
 440
 441         return err?:count;
 442 }
 443
 444 static DEVICE_ATTR(console, 0644, console_show, console_store);
 445
 446
 447 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
 448 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
 449
 450 #include "solos-attrlist.c"
 451
 452 #undef SOLOS_ATTR_RO
 453 #undef SOLOS_ATTR_RW
 454
 455 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
 456 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
 457
 458 static struct attribute *solos_attrs[] = {
 459 #include "solos-attrlist.c"
 460         NULL
 461 };
 462
 463 static struct attribute_group solos_attr_group = {
 464         .attrs = solos_attrs,
 465         .name = "parameters",
 466 };
 467
 468 static int flash_upgrade(struct solos_card *card, int chip)
 469 {
 470         const struct firmware *fw;
 471         const char *fw_name;
 472         uint32_t data32 = 0;
 473         int blocksize = 0;
 474         int numblocks = 0;
 475         int offset;
 476
 477         if (chip == 0) {
 478                 fw_name = "solos-FPGA.bin";
 479                 blocksize = FPGA_BLOCK;
 480         } else {
 481                 fw_name = "solos-Firmware.bin";
 482                 blocksize = SOLOS_BLOCK;
 483         }
 484
 485         if (request_firmware(&fw, fw_name, &card->dev->dev))
 486                 return -ENOENT;
 487
 488         dev_info(&card->dev->dev, "Flash upgrade starting\n");
 489
 490         numblocks = fw->size / blocksize;
 491         dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
 492         dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
 493
 494         dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
 495         iowrite32(1, card->config_regs + FPGA_MODE);
 496         data32 = ioread32(card->config_regs + FPGA_MODE);
 497
 498         /* Set mode to Chip Erase */
 499         dev_info(&card->dev->dev, "Set FPGA Flash mode to %s Chip Erase\n",
 500                  chip?"Solos":"FPGA");
 501         iowrite32((chip * 2), card->config_regs + FLASH_MODE);
 502
 503
 504         iowrite32(1, card->config_regs + WRITE_FLASH);
 505         wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
 506
 507         for (offset = 0; offset < fw->size; offset += blocksize) {
 508                 int i;
 509
 510                 /* Clear write flag */
 511                 iowrite32(0, card->config_regs + WRITE_FLASH);
 512
 513                 /* Set mode to Block Write */
 514                 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
 515                 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
 516
 517                 /* Copy block to buffer, swapping each 16 bits */
 518                 for(i = 0; i < blocksize; i += 4) {
 519                         uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
 520                         iowrite32(word, RX_BUF(card, 3) + i);
 521                 }
 522
 523                 /* Specify block number and then trigger flash write */
 524                 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
 525                 iowrite32(1, card->config_regs + WRITE_FLASH);
 526                 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
 527         }
 528
 529         release_firmware(fw);
 530         iowrite32(0, card->config_regs + WRITE_FLASH);
 531         iowrite32(0, card->config_regs + FPGA_MODE);
 532         iowrite32(0, card->config_regs + FLASH_MODE);
 533         dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
 534         return 0;
 535 }
 536
 537 static irqreturn_t solos_irq(int irq, void *dev_id)
 538 {
 539         struct solos_card *card = dev_id;
 540         int handled = 1;
 541
 542         //ACK IRQ
 543         iowrite32(0, card->config_regs + IRQ_CLEAR);
 544         //Disable IRQs from FPGA
 545         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
 546
 547         if (card->atmdev[0])
 548                 tasklet_schedule(&card->tlet);
 549         else
 550                 wake_up(&card->fw_wq);
 551
 552         //Enable IRQs from FPGA
 553         iowrite32(1, card->config_regs + IRQ_EN_ADDR);
 554         return IRQ_RETVAL(handled);
 555 }
 556
 557 void solos_bh(unsigned long card_arg)
 558 {
 559         struct solos_card *card = (void *)card_arg;
 560         int port;
 561         uint32_t card_flags;
 562         uint32_t tx_mask;
 563         uint32_t rx_done = 0;
 564
 565         card_flags = ioread32(card->config_regs + FLAGS_ADDR);
 566
 567         /* The TX bits are set if the channel is busy; clear if not. We want to
 568            invoke fpga_tx() unless _all_ the bits for active channels are set */
 569         tx_mask = (1 << card->nr_ports) - 1;
 570         if ((card_flags & tx_mask) != tx_mask)
 571                 fpga_tx(card);
 572
 573         for (port = 0; port < card->nr_ports; port++) {
 574                 if (card_flags & (0x10 << port)) {
 575                         struct pkt_hdr header;
 576                         struct sk_buff *skb;
 577                         struct atm_vcc *vcc;
 578                         int size;
 579
 580                         rx_done |= 0x10 << port;
 581
 582                         memcpy_fromio(&header, RX_BUF(card, port), sizeof(header));
 583
 584                         size = le16_to_cpu(header.size);
 585
 586                         skb = alloc_skb(size + 1, GFP_ATOMIC);
 587                         if (!skb) {
 588                                 if (net_ratelimit())
 589                                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
 590                                 continue;
 591                         }
 592
 593                         memcpy_fromio(skb_put(skb, size),
 594                                       RX_BUF(card, port) + sizeof(header),
 595                                       size);
 596
 597                         if (atmdebug) {
 598                                 dev_info(&card->dev->dev, "Received: device %d\n", port);
 599                                 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
 600                                          size, le16_to_cpu(header.vpi),
 601                                          le16_to_cpu(header.vci));
 602                                 print_buffer(skb);
 603                         }
 604
 605                         switch (le16_to_cpu(header.type)) {
 606                         case PKT_DATA:
 607                                 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header.vpi),
 608                                                le16_to_cpu(header.vci));
 609                                 if (!vcc) {
 610                                         if (net_ratelimit())
 611                                                 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
 612                                                          le16_to_cpu(header.vci), le16_to_cpu(header.vpi),
 613                                                          port);
 614                                         continue;
 615                                 }
 616                                 atm_charge(vcc, skb->truesize);
 617                                 vcc->push(vcc, skb);
 618                                 atomic_inc(&vcc->stats->rx);
 619                                 break;
 620
 621                         case PKT_STATUS:
 622                                 process_status(card, port, skb);
 623                                 dev_kfree_skb(skb);
 624                                 break;
 625
 626                         case PKT_COMMAND:
 627                         default: /* FIXME: Not really, surely? */
 628                                 if (process_command(card, port, skb))
 629                                         break;
 630                                 spin_lock(&card->cli_queue_lock);
 631                                 if (skb_queue_len(&card->cli_queue[port]) > 10) {
 632                                         if (net_ratelimit())
 633                                                 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
 634                                                          port);
 635                                 } else
 636                                         skb_queue_tail(&card->cli_queue[port], skb);
 637                                 spin_unlock(&card->cli_queue_lock);
 638                                 break;
 639                         }
 640                 }
 641         }
 642         if (rx_done)
 643                 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
 644
 645         return;
 646 }
 647
 648 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
 649 {
 650         struct hlist_head *head;
 651         struct atm_vcc *vcc = NULL;
 652         struct hlist_node *node;
 653         struct sock *s;
 654
 655         read_lock(&vcc_sklist_lock);
 656         head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
 657         sk_for_each(s, node, head) {
 658                 vcc = atm_sk(s);
 659                 if (vcc->dev == dev && vcc->vci == vci &&
 660                     vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
 661                         goto out;
 662         }
 663         vcc = NULL;
 664  out:
 665         read_unlock(&vcc_sklist_lock);
 666         return vcc;
 667 }
 668
 669 static int list_vccs(int vci)
 670 {
 671         struct hlist_head *head;
 672         struct atm_vcc *vcc;
 673         struct hlist_node *node;
 674         struct sock *s;
 675         int num_found = 0;
 676         int i;
 677
 678         read_lock(&vcc_sklist_lock);
 679         if (vci != 0){
 680                 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
 681                 sk_for_each(s, node, head) {
 682                         num_found ++;
 683                         vcc = atm_sk(s);
 684                         printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
 685                                vcc->dev->number,
 686                                vcc->vpi,
 687                                vcc->vci);
 688                 }
 689         } else {
 690                 for(i = 0; i < VCC_HTABLE_SIZE; i++){
 691                         head = &vcc_hash[i];
 692                         sk_for_each(s, node, head) {
 693                                 num_found ++;
 694                                 vcc = atm_sk(s);
 695                                 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
 696                                        vcc->dev->number,
 697                                        vcc->vpi,
 698                                        vcc->vci);
 699                         }
 700                 }
 701         }
 702         read_unlock(&vcc_sklist_lock);
 703         return num_found;
 704 }
 705
 706 static void release_vccs(struct atm_dev *dev)
 707 {
 708         int i;
 709
 710         write_lock_irq(&vcc_sklist_lock);
 711         for (i = 0; i < VCC_HTABLE_SIZE; i++) {
 712                 struct hlist_head *head = &vcc_hash[i];
 713                 struct hlist_node *node, *tmp;
 714                 struct sock *s;
 715                 struct atm_vcc *vcc;
 716
 717                 sk_for_each_safe(s, node, tmp, head) {
 718                         vcc = atm_sk(s);
 719                         if (vcc->dev == dev) {
 720                                 vcc_release_async(vcc, -EPIPE);
 721                                 sk_del_node_init(s);
 722                         }
 723                 }
 724         }
 725         write_unlock_irq(&vcc_sklist_lock);
 726 }
 727
 728
 729 static int popen(struct atm_vcc *vcc)
 730 {
 731         struct solos_card *card = vcc->dev->dev_data;
 732         struct sk_buff *skb;
 733         struct pkt_hdr *header;
 734
 735         if (vcc->qos.aal != ATM_AAL5) {
 736                 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
 737                          vcc->qos.aal);
 738                 return -EINVAL;
 739         }
 740
 741         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
 742         if (!skb && net_ratelimit()) {
 743                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
 744                 return -ENOMEM;
 745         }
 746         header = (void *)skb_put(skb, sizeof(*header));
 747
 748         header->size = cpu_to_le16(0);
 749         header->vpi = cpu_to_le16(vcc->vpi);
 750         header->vci = cpu_to_le16(vcc->vci);
 751         header->type = cpu_to_le16(PKT_POPEN);
 752
 753         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
 754
 755 //      dev_dbg(&card->dev->dev, "Open for vpi %d and vci %d on interface %d\n", vcc->vpi, vcc->vci, SOLOS_CHAN(vcc->dev));
 756         set_bit(ATM_VF_ADDR, &vcc->flags); // accept the vpi / vci
 757         set_bit(ATM_VF_READY, &vcc->flags);
 758         list_vccs(0);
 759
 760
 761         return 0;
 762 }
 763
 764 static void pclose(struct atm_vcc *vcc)
 765 {
 766         struct solos_card *card = vcc->dev->dev_data;
 767         struct sk_buff *skb;
 768         struct pkt_hdr *header;
 769
 770         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
 771         if (!skb) {
 772                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
 773                 return;
 774         }
 775         header = (void *)skb_put(skb, sizeof(*header));
 776
 777         header->size = cpu_to_le16(0);
 778         header->vpi = cpu_to_le16(vcc->vpi);
 779         header->vci = cpu_to_le16(vcc->vci);
 780         header->type = cpu_to_le16(PKT_PCLOSE);
 781
 782         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
 783
 784 //      dev_dbg(&card->dev->dev, "Close for vpi %d and vci %d on interface %d\n", vcc->vpi, vcc->vci, SOLOS_CHAN(vcc->dev));
 785
 786         clear_bit(ATM_VF_ADDR, &vcc->flags);
 787         clear_bit(ATM_VF_READY, &vcc->flags);
 788
 789         return;
 790 }
 791
 792 static int print_buffer(struct sk_buff *buf)
 793 {
 794         int len,i;
 795         char msg[500];
 796         char item[10];
 797
 798         len = buf->len;
 799         for (i = 0; i < len; i++){
 800                 if(i % 8 == 0)
 801                         sprintf(msg, "%02X: ", i);
 802
 803                 sprintf(item,"%02X ",*(buf->data + i));
 804                 strcat(msg, item);
 805                 if(i % 8 == 7) {
 806                         sprintf(item, "\n");
 807                         strcat(msg, item);
 808                         printk(KERN_DEBUG "%s", msg);
 809                 }
 810         }
 811         if (i % 8 != 0) {
 812                 sprintf(item, "\n");
 813                 strcat(msg, item);
 814                 printk(KERN_DEBUG "%s", msg);
 815         }
 816         printk(KERN_DEBUG "\n");
 817
 818         return 0;
 819 }
 820
 821 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
 822                        struct atm_vcc *vcc)
 823 {
 824         int old_len;
 825
 826         *(void **)skb->cb = vcc;
 827
 828         spin_lock(&card->tx_queue_lock);
 829         old_len = skb_queue_len(&card->tx_queue[port]);
 830         skb_queue_tail(&card->tx_queue[port], skb);
 831         spin_unlock(&card->tx_queue_lock);
 832
 833         /* If TX might need to be started, do so */
 834         if (!old_len)
 835                 fpga_tx(card);
 836 }
 837
 838 static int fpga_tx(struct solos_card *card)
 839 {
 840         uint32_t tx_pending;
 841         uint32_t tx_started = 0;
 842         struct sk_buff *skb;
 843         struct atm_vcc *vcc;
 844         unsigned char port;
 845         unsigned long flags;
 846
 847         spin_lock_irqsave(&card->tx_lock, flags);
 848
 849         tx_pending = ioread32(card->config_regs + FLAGS_ADDR);
 850
 851         dev_vdbg(&card->dev->dev, "TX Flags are %X\n", tx_pending);
 852
 853         for (port = 0; port < card->nr_ports; port++) {
 854                 if (!(tx_pending & (1 << port))) {
 855
 856                         spin_lock(&card->tx_queue_lock);
 857                         skb = skb_dequeue(&card->tx_queue[port]);
 858                         spin_unlock(&card->tx_queue_lock);
 859
 860                         if (!skb)
 861                                 continue;
 862
 863                         if (atmdebug) {
 864                                 dev_info(&card->dev->dev, "Transmitted: port %d\n",
 865                                          port);
 866                                 print_buffer(skb);
 867                         }
 868                         memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
 869
 870                         vcc = *(void **)skb->cb;
 871
 872                         if (vcc) {
 873                                 atomic_inc(&vcc->stats->tx);
 874                                 solos_pop(vcc, skb);
 875                         } else
 876                                 dev_kfree_skb_irq(skb);
 877
 878                         tx_started |= 1 << port; //Set TX full flag
 879                 }
 880         }
 881         if (tx_started)
 882                 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
 883
 884         spin_unlock_irqrestore(&card->tx_lock, flags);
 885         return 0;
 886 }
 887
 888 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
 889 {
 890         struct solos_card *card = vcc->dev->dev_data;
 891         struct sk_buff *skb2 = NULL;
 892         struct pkt_hdr *header;
 893         int pktlen;
 894
 895         //dev_dbg(&card->dev->dev, "psend called.\n");
 896         //dev_dbg(&card->dev->dev, "dev,vpi,vci = %d,%d,%d\n",SOLOS_CHAN(vcc->dev),vcc->vpi,vcc->vci);
 897
 898         if (debug) {
 899                 skb2 = atm_alloc_charge(vcc, skb->len, GFP_ATOMIC);
 900                 if (skb2) {
 901                         memcpy(skb2->data, skb->data, skb->len);
 902                         skb_put(skb2, skb->len);
 903                         vcc->push(vcc, skb2);
 904                         atomic_inc(&vcc->stats->rx);
 905                 }
 906                 atomic_inc(&vcc->stats->tx);
 907                 solos_pop(vcc, skb);
 908                 return 0;
 909         }
 910
 911         pktlen = skb->len;
 912         if (pktlen > (BUF_SIZE - sizeof(*header))) {
 913                 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
 914                 solos_pop(vcc, skb);
 915                 return 0;
 916         }
 917
 918         if (!skb_clone_writable(skb, sizeof(*header))) {
 919                 int expand_by = 0;
 920                 int ret;
 921
 922                 if (skb_headroom(skb) < sizeof(*header))
 923                         expand_by = sizeof(*header) - skb_headroom(skb);
 924
 925                 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
 926                 if (ret) {
 927                         dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
 928                         solos_pop(vcc, skb);
 929                         return ret;
 930                 }
 931         }
 932
 933         header = (void *)skb_push(skb, sizeof(*header));
 934
 935         /* This does _not_ include the size of the header */
 936         header->size = cpu_to_le16(pktlen);
 937         header->vpi = cpu_to_le16(vcc->vpi);
 938         header->vci = cpu_to_le16(vcc->vci);
 939         header->type = cpu_to_le16(PKT_DATA);
 940
 941         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
 942
 943         return 0;
 944 }
 945
 946 static struct atmdev_ops fpga_ops = {
 947         .open =         popen,
 948         .close =        pclose,
 949         .ioctl =        NULL,
 950         .getsockopt =   NULL,
 951         .setsockopt =   NULL,
 952         .send =         psend,
 953         .send_oam =     NULL,
 954         .phy_put =      NULL,
 955         .phy_get =      NULL,
 956         .change_qos =   NULL,
 957         .proc_read =    NULL,
 958         .owner =        THIS_MODULE
 959 };
 960
 961 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
 962 {
 963         int err, i;
 964         uint16_t fpga_ver;
 965         uint8_t major_ver, minor_ver;
 966         uint32_t data32;
 967         struct solos_card *card;
 968
 969         if (debug)
 970                 return 0;
 971
 972         card = kzalloc(sizeof(*card), GFP_KERNEL);
 973         if (!card)
 974                 return -ENOMEM;
 975
 976         card->dev = dev;
 977         init_waitqueue_head(&card->fw_wq);
 978         init_waitqueue_head(&card->param_wq);
 979
 980         err = pci_enable_device(dev);
 981         if (err) {
 982                 dev_warn(&dev->dev,  "Failed to enable PCI device\n");
 983                 goto out;
 984         }
 985
 986         err = pci_request_regions(dev, "solos");
 987         if (err) {
 988                 dev_warn(&dev->dev, "Failed to request regions\n");
 989                 goto out;
 990         }
 991
 992         card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
 993         if (!card->config_regs) {
 994                 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
 995                 goto out_release_regions;
 996         }
 997         card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
 998         if (!card->buffers) {
 999                 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1000                 goto out_unmap_config;
1001         }
1002
1003 //      for(i=0;i<64 ;i+=4){
1004 //              data32=ioread32(card->buffers + i);
1005 //              dev_dbg(&card->dev->dev, "%08lX\n",(unsigned long)data32);
1006 //      }
1007
1008         //Fill Config Mem with zeros
1009         for(i = 0; i < 128; i += 4)
1010                 iowrite32(0, card->config_regs + i);
1011
1012         //Set RX empty flags
1013         iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1014
1015         data32 = ioread32(card->config_regs + FPGA_VER);
1016         fpga_ver = (data32 & 0x0000FFFF);
1017         major_ver = ((data32 & 0xFF000000) >> 24);
1018         minor_ver = ((data32 & 0x00FF0000) >> 16);
1019         dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1020                  major_ver, minor_ver, fpga_ver);
1021
1022         card->nr_ports = 2; /* FIXME: Detect daughterboard */
1023
1024         pci_set_drvdata(dev, card);
1025
1026         tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1027         spin_lock_init(&card->tx_lock);
1028         spin_lock_init(&card->tx_queue_lock);
1029         spin_lock_init(&card->cli_queue_lock);
1030         spin_lock_init(&card->param_queue_lock);
1031         INIT_LIST_HEAD(&card->param_queue);
1032
1033 /*
1034         // Set Loopback mode
1035         data32 = 0x00010000;
1036         iowrite32(data32,card->config_regs + FLAGS_ADDR);
1037 */
1038 /*
1039         // Fill Buffers with zeros
1040         for (i = 0; i < BUF_SIZE * 8; i += 4)
1041                 iowrite32(0, card->buffers + i);
1042 */
1043 /*
1044         for(i = 0; i < (BUF_SIZE * 1); i += 4)
1045                 iowrite32(0x12345678, card->buffers + i + (0*BUF_SIZE));
1046         for(i = 0; i < (BUF_SIZE * 1); i += 4)
1047                 iowrite32(0xabcdef98, card->buffers + i + (1*BUF_SIZE));
1048
1049         // Read Config Memory
1050         printk(KERN_DEBUG "Reading Config MEM\n");
1051         i = 0;
1052         for(i = 0; i < 16; i++) {
1053                 data32=ioread32(card->buffers + i*(BUF_SIZE/2));
1054                 printk(KERN_ALERT "Addr: %lX Data: %08lX\n",
1055                        (unsigned long)(addr_start + i*(BUF_SIZE/2)),
1056                        (unsigned long)data32);
1057         }
1058 */
1059         //dev_dbg(&card->dev->dev, "Requesting IRQ: %d\n",dev->irq);
1060         err = request_irq(dev->irq, solos_irq, IRQF_DISABLED|IRQF_SHARED,
1061                           "solos-pci", card);
1062         if (err) {
1063                 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1064                 goto out_unmap_both;
1065         }
1066
1067         // Enable IRQs
1068         iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1069
1070         if (fpga_upgrade)
1071                 flash_upgrade(card, 0);
1072
1073         if (firmware_upgrade)
1074                 flash_upgrade(card, 1);
1075
1076         err = atm_init(card);
1077         if (err)
1078                 goto out_free_irq;
1079
1080         return 0;
1081
1082  out_free_irq:
1083         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1084         free_irq(dev->irq, card);
1085         tasklet_kill(&card->tlet);
1086
1087  out_unmap_both:
1088         pci_set_drvdata(dev, NULL);
1089         pci_iounmap(dev, card->config_regs);
1090  out_unmap_config:
1091         pci_iounmap(dev, card->buffers);
1092  out_release_regions:
1093         pci_release_regions(dev);
1094  out:
1095         return err;
1096 }
1097
1098 static int atm_init(struct solos_card *card)
1099 {
1100         int i;
1101
1102         for (i = 0; i < card->nr_ports; i++) {
1103                 struct sk_buff *skb;
1104                 struct pkt_hdr *header;
1105
1106                 skb_queue_head_init(&card->tx_queue[i]);
1107                 skb_queue_head_init(&card->cli_queue[i]);
1108
1109                 card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
1110                 if (!card->atmdev[i]) {
1111                         dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1112                         atm_remove(card);
1113                         return -ENODEV;
1114                 }
1115                 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1116                         dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1117                 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1118                         dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1119
1120                 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1121
1122                 card->atmdev[i]->ci_range.vpi_bits = 8;
1123                 card->atmdev[i]->ci_range.vci_bits = 16;
1124                 card->atmdev[i]->dev_data = card;
1125                 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1126                 card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
1127
1128                 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1129                 if (!skb) {
1130                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1131                         continue;
1132                 }
1133
1134                 header = (void *)skb_put(skb, sizeof(*header));
1135
1136                 header->size = cpu_to_le16(0);
1137                 header->vpi = cpu_to_le16(0);
1138                 header->vci = cpu_to_le16(0);
1139                 header->type = cpu_to_le16(PKT_STATUS);
1140
1141                 fpga_queue(card, i, skb, NULL);
1142         }
1143         return 0;
1144 }
1145
1146 static void atm_remove(struct solos_card *card)
1147 {
1148         int i;
1149
1150         for (i = 0; i < card->nr_ports; i++) {
1151                 if (card->atmdev[i]) {
1152                         dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1153                         atm_dev_deregister(card->atmdev[i]);
1154                 }
1155         }
1156 }
1157
1158 static void fpga_remove(struct pci_dev *dev)
1159 {
1160         struct solos_card *card = pci_get_drvdata(dev);
1161
1162         if (debug)
1163                 return;
1164
1165         atm_remove(card);
1166
1167         dev_vdbg(&dev->dev, "Freeing IRQ\n");
1168         // Disable IRQs from FPGA
1169         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1170         free_irq(dev->irq, card);
1171         tasklet_kill(&card->tlet);
1172
1173         //      iowrite32(0x01,pciregs);
1174         dev_vdbg(&dev->dev, "Unmapping PCI resource\n");
1175         pci_iounmap(dev, card->buffers);
1176         pci_iounmap(dev, card->config_regs);
1177
1178         dev_vdbg(&dev->dev, "Releasing PCI Region\n");
1179         pci_release_regions(dev);
1180         pci_disable_device(dev);
1181
1182         pci_set_drvdata(dev, NULL);
1183         kfree(card);
1184 //      dev_dbg(&card->dev->dev, "fpga_remove\n");
1185         return;
1186 }
1187
1188 static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
1189         { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1190         { 0, }
1191 };
1192
1193 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1194
1195 static struct pci_driver fpga_driver = {
1196         .name =         "solos",
1197         .id_table =     fpga_pci_tbl,
1198         .probe =        fpga_probe,
1199         .remove =       fpga_remove,
1200 };
1201
1202
1203 static int __init solos_pci_init(void)
1204 {
1205         printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1206         return pci_register_driver(&fpga_driver);
1207 }
1208
1209 static void __exit solos_pci_exit(void)
1210 {
1211         pci_unregister_driver(&fpga_driver);
1212         printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1213 }
1214
1215 module_init(solos_pci_init);
1216 module_exit(solos_pci_exit);