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 #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        4096
  63 #define FPGA_PAGE       528 /* FPGA flash page size*/
  64 #define SOLOS_PAGE      512 /* Solos flash page size*/
  65 #define FPGA_BLOCK      (FPGA_PAGE * 8) /* FPGA flash block size*/
  66 #define SOLOS_BLOCK     (SOLOS_PAGE * 8) /* Solos flash block size*/
  67
  68 #define RX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2)
  69 #define TX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2 + BUF_SIZE)
  70
  71 #define RX_DMA_SIZE     2048
  72
  73 static int reset = 0;
  74 static int atmdebug = 0;
  75 static int firmware_upgrade = 0;
  76 static int fpga_upgrade = 0;
  77
  78 struct pkt_hdr {
  79         __le16 size;
  80         __le16 vpi;
  81         __le16 vci;
  82         __le16 type;
  83 };
  84
  85 struct solos_skb_cb {
  86         struct atm_vcc *vcc;
  87         uint32_t dma_addr;
  88 };
  89
  90
  91 #define SKB_CB(skb)             ((struct solos_skb_cb *)skb->cb)
  92
  93 #define PKT_DATA        0
  94 #define PKT_COMMAND     1
  95 #define PKT_POPEN       3
  96 #define PKT_PCLOSE      4
  97 #define PKT_STATUS      5
  98
  99 struct solos_card {
 100         void __iomem *config_regs;
 101         void __iomem *buffers;
 102         int nr_ports;
 103         int tx_mask;
 104         struct pci_dev *dev;
 105         struct atm_dev *atmdev[4];
 106         struct tasklet_struct tlet;
 107         spinlock_t tx_lock;
 108         spinlock_t tx_queue_lock;
 109         spinlock_t cli_queue_lock;
 110         spinlock_t param_queue_lock;
 111         struct list_head param_queue;
 112         struct sk_buff_head tx_queue[4];
 113         struct sk_buff_head cli_queue[4];
 114         struct sk_buff *tx_skb[4];
 115         struct sk_buff *rx_skb[4];
 116         wait_queue_head_t param_wq;
 117         wait_queue_head_t fw_wq;
 118         int using_dma;
 119 };
 120
 121
 122 struct solos_param {
 123         struct list_head list;
 124         pid_t pid;
 125         int port;
 126         struct sk_buff *response;
 127 };
 128
 129 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
 130
 131 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
 132 MODULE_DESCRIPTION("Solos PCI driver");
 133 MODULE_VERSION(VERSION);
 134 MODULE_LICENSE("GPL");
 135 MODULE_PARM_DESC(reset, "Reset Solos chips on startup");
 136 MODULE_PARM_DESC(atmdebug, "Print ATM data");
 137 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
 138 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
 139 module_param(reset, int, 0444);
 140 module_param(atmdebug, int, 0644);
 141 module_param(firmware_upgrade, int, 0444);
 142 module_param(fpga_upgrade, int, 0444);
 143
 144 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
 145                        struct atm_vcc *vcc);
 146 static uint32_t fpga_tx(struct solos_card *);
 147 static irqreturn_t solos_irq(int irq, void *dev_id);
 148 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
 149 static int list_vccs(int vci);
 150 static void release_vccs(struct atm_dev *dev);
 151 static int atm_init(struct solos_card *);
 152 static void atm_remove(struct solos_card *);
 153 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
 154 static void solos_bh(unsigned long);
 155 static int print_buffer(struct sk_buff *buf);
 156
 157 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
 158 {
 159         if (vcc->pop)
 160                 vcc->pop(vcc, skb);
 161         else
 162                 dev_kfree_skb_any(skb);
 163 }
 164
 165 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
 166                                 char *buf)
 167 {
 168         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 169         struct solos_card *card = atmdev->dev_data;
 170         struct solos_param prm;
 171         struct sk_buff *skb;
 172         struct pkt_hdr *header;
 173         int buflen;
 174
 175         buflen = strlen(attr->attr.name) + 10;
 176
 177         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
 178         if (!skb) {
 179                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
 180                 return -ENOMEM;
 181         }
 182
 183         header = (void *)skb_put(skb, sizeof(*header));
 184
 185         buflen = snprintf((void *)&header[1], buflen - 1,
 186                           "L%05d\n%s\n", current->pid, attr->attr.name);
 187         skb_put(skb, buflen);
 188
 189         header->size = cpu_to_le16(buflen);
 190         header->vpi = cpu_to_le16(0);
 191         header->vci = cpu_to_le16(0);
 192         header->type = cpu_to_le16(PKT_COMMAND);
 193
 194         prm.pid = current->pid;
 195         prm.response = NULL;
 196         prm.port = SOLOS_CHAN(atmdev);
 197
 198         spin_lock_irq(&card->param_queue_lock);
 199         list_add(&prm.list, &card->param_queue);
 200         spin_unlock_irq(&card->param_queue_lock);
 201
 202         fpga_queue(card, prm.port, skb, NULL);
 203
 204         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
 205
 206         spin_lock_irq(&card->param_queue_lock);
 207         list_del(&prm.list);
 208         spin_unlock_irq(&card->param_queue_lock);
 209
 210         if (!prm.response)
 211                 return -EIO;
 212
 213         buflen = prm.response->len;
 214         memcpy(buf, prm.response->data, buflen);
 215         kfree_skb(prm.response);
 216
 217         return buflen;
 218 }
 219
 220 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
 221                                  const char *buf, size_t count)
 222 {
 223         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 224         struct solos_card *card = atmdev->dev_data;
 225         struct solos_param prm;
 226         struct sk_buff *skb;
 227         struct pkt_hdr *header;
 228         int buflen;
 229         ssize_t ret;
 230
 231         buflen = strlen(attr->attr.name) + 11 + count;
 232
 233         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
 234         if (!skb) {
 235                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
 236                 return -ENOMEM;
 237         }
 238
 239         header = (void *)skb_put(skb, sizeof(*header));
 240
 241         buflen = snprintf((void *)&header[1], buflen - 1,
 242                           "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
 243
 244         skb_put(skb, buflen);
 245         header->size = cpu_to_le16(buflen);
 246         header->vpi = cpu_to_le16(0);
 247         header->vci = cpu_to_le16(0);
 248         header->type = cpu_to_le16(PKT_COMMAND);
 249
 250         prm.pid = current->pid;
 251         prm.response = NULL;
 252         prm.port = SOLOS_CHAN(atmdev);
 253
 254         spin_lock_irq(&card->param_queue_lock);
 255         list_add(&prm.list, &card->param_queue);
 256         spin_unlock_irq(&card->param_queue_lock);
 257
 258         fpga_queue(card, prm.port, skb, NULL);
 259
 260         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
 261
 262         spin_lock_irq(&card->param_queue_lock);
 263         list_del(&prm.list);
 264         spin_unlock_irq(&card->param_queue_lock);
 265
 266         skb = prm.response;
 267
 268         if (!skb)
 269                 return -EIO;
 270
 271         buflen = skb->len;
 272
 273         /* Sometimes it has a newline, sometimes it doesn't. */
 274         if (skb->data[buflen - 1] == '\n')
 275                 buflen--;
 276
 277         if (buflen == 2 && !strncmp(skb->data, "OK", 2))
 278                 ret = count;
 279         else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
 280                 ret = -EIO;
 281         else {
 282                 /* We know we have enough space allocated for this; we allocated
 283                    it ourselves */
 284                 skb->data[buflen] = 0;
 285
 286                 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
 287                          skb->data);
 288                 ret = -EIO;
 289         }
 290         kfree_skb(skb);
 291
 292         return ret;
 293 }
 294
 295 static char *next_string(struct sk_buff *skb)
 296 {
 297         int i = 0;
 298         char *this = skb->data;
 299
 300         for (i = 0; i < skb->len; i++) {
 301                 if (this[i] == '\n') {
 302                         this[i] = 0;
 303                         skb_pull(skb, i + 1);
 304                         return this;
 305                 }
 306                 if (!isprint(this[i]))
 307                         return NULL;
 308         }
 309         return NULL;
 310 }
 311
 312 /*
 313  * Status packet has fields separated by \n, starting with a version number
 314  * for the information therein. Fields are....
 315  *
 316  *     packet version
 317  *     TxBitRate        (version >= 1)
 318  *     RxBitRate        (version >= 1)
 319  *     State            (version >= 1)
 320  */
 321 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
 322 {
 323         char *str, *end, *state_str;
 324         int ver, rate_up, rate_down, state;
 325
 326         if (!card->atmdev[port])
 327                 return -ENODEV;
 328
 329         str = next_string(skb);
 330         if (!str)
 331                 return -EIO;
 332
 333         ver = simple_strtol(str, NULL, 10);
 334         if (ver < 1) {
 335                 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
 336                          ver);
 337                 return -EIO;
 338         }
 339
 340         str = next_string(skb);
 341         if (!str)
 342                 return -EIO;
 343         rate_up = simple_strtol(str, &end, 10);
 344         if (*end)
 345                 return -EIO;
 346
 347         str = next_string(skb);
 348         if (!str)
 349                 return -EIO;
 350         rate_down = simple_strtol(str, &end, 10);
 351         if (*end)
 352                 return -EIO;
 353
 354         state_str = next_string(skb);
 355         if (!state_str)
 356                 return -EIO;
 357         if (!strcmp(state_str, "Showtime"))
 358                 state = ATM_PHY_SIG_FOUND;
 359         else {
 360                 state = ATM_PHY_SIG_LOST;
 361                 release_vccs(card->atmdev[port]);
 362         }
 363
 364         if (state == ATM_PHY_SIG_LOST) {
 365                 dev_info(&card->dev->dev, "Port %d ATM state: %s\n",
 366                          port, state_str);
 367         } else {
 368                 char *snr, *attn;
 369
 370                 snr = next_string(skb);
 371                 if (!str)
 372                         return -EIO;
 373                 attn = next_string(skb);
 374                 if (!attn)
 375                         return -EIO;
 376
 377                 dev_info(&card->dev->dev, "Port %d: %s (%d/%d kb/s%s%s%s%s)\n",
 378                          port, state_str, rate_down/1000, rate_up/1000,
 379                          snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
 380         }
 381         card->atmdev[port]->link_rate = rate_down / 424;
 382         card->atmdev[port]->signal = state;
 383
 384         return 0;
 385 }
 386
 387 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
 388 {
 389         struct solos_param *prm;
 390         unsigned long flags;
 391         int cmdpid;
 392         int found = 0;
 393
 394         if (skb->len < 7)
 395                 return 0;
 396
 397         if (skb->data[0] != 'L'    || !isdigit(skb->data[1]) ||
 398             !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
 399             !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
 400             skb->data[6] != '\n')
 401                 return 0;
 402
 403         cmdpid = simple_strtol(&skb->data[1], NULL, 10);
 404
 405         spin_lock_irqsave(&card->param_queue_lock, flags);
 406         list_for_each_entry(prm, &card->param_queue, list) {
 407                 if (prm->port == port && prm->pid == cmdpid) {
 408                         prm->response = skb;
 409                         skb_pull(skb, 7);
 410                         wake_up(&card->param_wq);
 411                         found = 1;
 412                         break;
 413                 }
 414         }
 415         spin_unlock_irqrestore(&card->param_queue_lock, flags);
 416         return found;
 417 }
 418
 419 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
 420                             char *buf)
 421 {
 422         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 423         struct solos_card *card = atmdev->dev_data;
 424         struct sk_buff *skb;
 425
 426         spin_lock(&card->cli_queue_lock);
 427         skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
 428         spin_unlock(&card->cli_queue_lock);
 429         if(skb == NULL)
 430                 return sprintf(buf, "No data.\n");
 431
 432         memcpy(buf, skb->data, skb->len);
 433         dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
 434
 435         kfree_skb(skb);
 436         return skb->len;
 437 }
 438
 439 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
 440 {
 441         struct sk_buff *skb;
 442         struct pkt_hdr *header;
 443
 444         if (size > (BUF_SIZE - sizeof(*header))) {
 445                 dev_dbg(&card->dev->dev, "Command is too big.  Dropping request\n");
 446                 return 0;
 447         }
 448         skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
 449         if (!skb) {
 450                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
 451                 return 0;
 452         }
 453
 454         header = (void *)skb_put(skb, sizeof(*header));
 455
 456         header->size = cpu_to_le16(size);
 457         header->vpi = cpu_to_le16(0);
 458         header->vci = cpu_to_le16(0);
 459         header->type = cpu_to_le16(PKT_COMMAND);
 460
 461         memcpy(skb_put(skb, size), buf, size);
 462
 463         fpga_queue(card, dev, skb, NULL);
 464
 465         return 0;
 466 }
 467
 468 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
 469                              const char *buf, size_t count)
 470 {
 471         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 472         struct solos_card *card = atmdev->dev_data;
 473         int err;
 474
 475         err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
 476
 477         return err?:count;
 478 }
 479
 480 static DEVICE_ATTR(console, 0644, console_show, console_store);
 481
 482
 483 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
 484 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
 485
 486 #include "solos-attrlist.c"
 487
 488 #undef SOLOS_ATTR_RO
 489 #undef SOLOS_ATTR_RW
 490
 491 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
 492 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
 493
 494 static struct attribute *solos_attrs[] = {
 495 #include "solos-attrlist.c"
 496         NULL
 497 };
 498
 499 static struct attribute_group solos_attr_group = {
 500         .attrs = solos_attrs,
 501         .name = "parameters",
 502 };
 503
 504 static int flash_upgrade(struct solos_card *card, int chip)
 505 {
 506         const struct firmware *fw;
 507         const char *fw_name;
 508         uint32_t data32 = 0;
 509         int blocksize = 0;
 510         int numblocks = 0;
 511         int offset;
 512
 513         if (chip == 0) {
 514                 fw_name = "solos-FPGA.bin";
 515                 blocksize = FPGA_BLOCK;
 516         } else {
 517                 fw_name = "solos-Firmware.bin";
 518                 blocksize = SOLOS_BLOCK;
 519         }
 520
 521         if (request_firmware(&fw, fw_name, &card->dev->dev))
 522                 return -ENOENT;
 523
 524         dev_info(&card->dev->dev, "Flash upgrade starting\n");
 525
 526         numblocks = fw->size / blocksize;
 527         dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
 528         dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
 529
 530         dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
 531         iowrite32(1, card->config_regs + FPGA_MODE);
 532         data32 = ioread32(card->config_regs + FPGA_MODE);
 533
 534         /* Set mode to Chip Erase */
 535         dev_info(&card->dev->dev, "Set FPGA Flash mode to %s Chip Erase\n",
 536                  chip?"Solos":"FPGA");
 537         iowrite32((chip * 2), card->config_regs + FLASH_MODE);
 538
 539
 540         iowrite32(1, card->config_regs + WRITE_FLASH);
 541         wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
 542
 543         for (offset = 0; offset < fw->size; offset += blocksize) {
 544                 int i;
 545
 546                 /* Clear write flag */
 547                 iowrite32(0, card->config_regs + WRITE_FLASH);
 548
 549                 /* Set mode to Block Write */
 550                 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
 551                 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
 552
 553                 /* Copy block to buffer, swapping each 16 bits */
 554                 for(i = 0; i < blocksize; i += 4) {
 555                         uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
 556                         iowrite32(word, RX_BUF(card, 3) + i);
 557                 }
 558
 559                 /* Specify block number and then trigger flash write */
 560                 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
 561                 iowrite32(1, card->config_regs + WRITE_FLASH);
 562                 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
 563         }
 564
 565         release_firmware(fw);
 566         iowrite32(0, card->config_regs + WRITE_FLASH);
 567         iowrite32(0, card->config_regs + FPGA_MODE);
 568         iowrite32(0, card->config_regs + FLASH_MODE);
 569         dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
 570         return 0;
 571 }
 572
 573 static irqreturn_t solos_irq(int irq, void *dev_id)
 574 {
 575         struct solos_card *card = dev_id;
 576         int handled = 1;
 577
 578         iowrite32(0, card->config_regs + IRQ_CLEAR);
 579
 580         /* If we're up and running, just kick the tasklet to process TX/RX */
 581         if (card->atmdev[0])
 582                 tasklet_schedule(&card->tlet);
 583         else
 584                 wake_up(&card->fw_wq);
 585
 586         return IRQ_RETVAL(handled);
 587 }
 588
 589 void solos_bh(unsigned long card_arg)
 590 {
 591         struct solos_card *card = (void *)card_arg;
 592         uint32_t card_flags;
 593         uint32_t rx_done = 0;
 594         int port;
 595
 596         /*
 597          * Since fpga_tx() is going to need to read the flags under its lock,
 598          * it can return them to us so that we don't have to hit PCI MMIO
 599          * again for the same information
 600          */
 601         card_flags = fpga_tx(card);
 602
 603         for (port = 0; port < card->nr_ports; port++) {
 604                 if (card_flags & (0x10 << port)) {
 605                         struct pkt_hdr _hdr, *header;
 606                         struct sk_buff *skb;
 607                         struct atm_vcc *vcc;
 608                         int size;
 609
 610                         if (card->using_dma) {
 611                                 skb = card->rx_skb[port];
 612                                 card->rx_skb[port] = NULL;
 613
 614                                 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
 615                                                  RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
 616
 617                                 header = (void *)skb->data;
 618                                 size = le16_to_cpu(header->size);
 619                                 skb_put(skb, size + sizeof(*header));
 620                                 skb_pull(skb, sizeof(*header));
 621                         } else {
 622                                 header = &_hdr;
 623
 624                                 rx_done |= 0x10 << port;
 625
 626                                 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
 627
 628                                 size = le16_to_cpu(header->size);
 629
 630                                 skb = alloc_skb(size + 1, GFP_ATOMIC);
 631                                 if (!skb) {
 632                                         if (net_ratelimit())
 633                                                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
 634                                         continue;
 635                                 }
 636
 637                                 memcpy_fromio(skb_put(skb, size),
 638                                               RX_BUF(card, port) + sizeof(*header),
 639                                               size);
 640                         }
 641                         if (atmdebug) {
 642                                 dev_info(&card->dev->dev, "Received: device %d\n", port);
 643                                 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
 644                                          size, le16_to_cpu(header->vpi),
 645                                          le16_to_cpu(header->vci));
 646                                 print_buffer(skb);
 647                         }
 648
 649                         switch (le16_to_cpu(header->type)) {
 650                         case PKT_DATA:
 651                                 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
 652                                                le16_to_cpu(header->vci));
 653                                 if (!vcc) {
 654                                         if (net_ratelimit())
 655                                                 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
 656                                                          le16_to_cpu(header->vci), le16_to_cpu(header->vpi),
 657                                                          port);
 658                                         continue;
 659                                 }
 660                                 atm_charge(vcc, skb->truesize);
 661                                 vcc->push(vcc, skb);
 662                                 atomic_inc(&vcc->stats->rx);
 663                                 break;
 664
 665                         case PKT_STATUS:
 666                                 process_status(card, port, skb);
 667                                 dev_kfree_skb_any(skb);
 668                                 break;
 669
 670                         case PKT_COMMAND:
 671                         default: /* FIXME: Not really, surely? */
 672                                 if (process_command(card, port, skb))
 673                                         break;
 674                                 spin_lock(&card->cli_queue_lock);
 675                                 if (skb_queue_len(&card->cli_queue[port]) > 10) {
 676                                         if (net_ratelimit())
 677                                                 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
 678                                                          port);
 679                                         dev_kfree_skb_any(skb);
 680                                 } else
 681                                         skb_queue_tail(&card->cli_queue[port], skb);
 682                                 spin_unlock(&card->cli_queue_lock);
 683                                 break;
 684                         }
 685                 }
 686                 /* Allocate RX skbs for any ports which need them */
 687                 if (card->using_dma && card->atmdev[port] &&
 688                     !card->rx_skb[port]) {
 689                         struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
 690                         if (skb) {
 691                                 SKB_CB(skb)->dma_addr =
 692                                         pci_map_single(card->dev, skb->data,
 693                                                        RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
 694                                 iowrite32(SKB_CB(skb)->dma_addr,
 695                                           card->config_regs + RX_DMA_ADDR(port));
 696                                 card->rx_skb[port] = skb;
 697                         } else {
 698                                 if (net_ratelimit())
 699                                         dev_warn(&card->dev->dev, "Failed to allocate RX skb");
 700
 701                                 /* We'll have to try again later */
 702                                 tasklet_schedule(&card->tlet);
 703                         }
 704                 }
 705         }
 706         if (rx_done)
 707                 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
 708
 709         return;
 710 }
 711
 712 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
 713 {
 714         struct hlist_head *head;
 715         struct atm_vcc *vcc = NULL;
 716         struct hlist_node *node;
 717         struct sock *s;
 718
 719         read_lock(&vcc_sklist_lock);
 720         head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
 721         sk_for_each(s, node, head) {
 722                 vcc = atm_sk(s);
 723                 if (vcc->dev == dev && vcc->vci == vci &&
 724                     vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
 725                         goto out;
 726         }
 727         vcc = NULL;
 728  out:
 729         read_unlock(&vcc_sklist_lock);
 730         return vcc;
 731 }
 732
 733 static int list_vccs(int vci)
 734 {
 735         struct hlist_head *head;
 736         struct atm_vcc *vcc;
 737         struct hlist_node *node;
 738         struct sock *s;
 739         int num_found = 0;
 740         int i;
 741
 742         read_lock(&vcc_sklist_lock);
 743         if (vci != 0){
 744                 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
 745                 sk_for_each(s, node, head) {
 746                         num_found ++;
 747                         vcc = atm_sk(s);
 748                         printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
 749                                vcc->dev->number,
 750                                vcc->vpi,
 751                                vcc->vci);
 752                 }
 753         } else {
 754                 for(i = 0; i < VCC_HTABLE_SIZE; i++){
 755                         head = &vcc_hash[i];
 756                         sk_for_each(s, node, head) {
 757                                 num_found ++;
 758                                 vcc = atm_sk(s);
 759                                 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
 760                                        vcc->dev->number,
 761                                        vcc->vpi,
 762                                        vcc->vci);
 763                         }
 764                 }
 765         }
 766         read_unlock(&vcc_sklist_lock);
 767         return num_found;
 768 }
 769
 770 static void release_vccs(struct atm_dev *dev)
 771 {
 772         int i;
 773
 774         write_lock_irq(&vcc_sklist_lock);
 775         for (i = 0; i < VCC_HTABLE_SIZE; i++) {
 776                 struct hlist_head *head = &vcc_hash[i];
 777                 struct hlist_node *node, *tmp;
 778                 struct sock *s;
 779                 struct atm_vcc *vcc;
 780
 781                 sk_for_each_safe(s, node, tmp, head) {
 782                         vcc = atm_sk(s);
 783                         if (vcc->dev == dev) {
 784                                 vcc_release_async(vcc, -EPIPE);
 785                                 sk_del_node_init(s);
 786                         }
 787                 }
 788         }
 789         write_unlock_irq(&vcc_sklist_lock);
 790 }
 791
 792
 793 static int popen(struct atm_vcc *vcc)
 794 {
 795         struct solos_card *card = vcc->dev->dev_data;
 796         struct sk_buff *skb;
 797         struct pkt_hdr *header;
 798
 799         if (vcc->qos.aal != ATM_AAL5) {
 800                 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
 801                          vcc->qos.aal);
 802                 return -EINVAL;
 803         }
 804
 805         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
 806         if (!skb && net_ratelimit()) {
 807                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
 808                 return -ENOMEM;
 809         }
 810         header = (void *)skb_put(skb, sizeof(*header));
 811
 812         header->size = cpu_to_le16(0);
 813         header->vpi = cpu_to_le16(vcc->vpi);
 814         header->vci = cpu_to_le16(vcc->vci);
 815         header->type = cpu_to_le16(PKT_POPEN);
 816
 817         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
 818
 819         set_bit(ATM_VF_ADDR, &vcc->flags);
 820         set_bit(ATM_VF_READY, &vcc->flags);
 821         list_vccs(0);
 822
 823
 824         return 0;
 825 }
 826
 827 static void pclose(struct atm_vcc *vcc)
 828 {
 829         struct solos_card *card = vcc->dev->dev_data;
 830         struct sk_buff *skb;
 831         struct pkt_hdr *header;
 832
 833         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
 834         if (!skb) {
 835                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
 836                 return;
 837         }
 838         header = (void *)skb_put(skb, sizeof(*header));
 839
 840         header->size = cpu_to_le16(0);
 841         header->vpi = cpu_to_le16(vcc->vpi);
 842         header->vci = cpu_to_le16(vcc->vci);
 843         header->type = cpu_to_le16(PKT_PCLOSE);
 844
 845         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
 846
 847         clear_bit(ATM_VF_ADDR, &vcc->flags);
 848         clear_bit(ATM_VF_READY, &vcc->flags);
 849
 850         return;
 851 }
 852
 853 static int print_buffer(struct sk_buff *buf)
 854 {
 855         int len,i;
 856         char msg[500];
 857         char item[10];
 858
 859         len = buf->len;
 860         for (i = 0; i < len; i++){
 861                 if(i % 8 == 0)
 862                         sprintf(msg, "%02X: ", i);
 863
 864                 sprintf(item,"%02X ",*(buf->data + i));
 865                 strcat(msg, item);
 866                 if(i % 8 == 7) {
 867                         sprintf(item, "\n");
 868                         strcat(msg, item);
 869                         printk(KERN_DEBUG "%s", msg);
 870                 }
 871         }
 872         if (i % 8 != 0) {
 873                 sprintf(item, "\n");
 874                 strcat(msg, item);
 875                 printk(KERN_DEBUG "%s", msg);
 876         }
 877         printk(KERN_DEBUG "\n");
 878
 879         return 0;
 880 }
 881
 882 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
 883                        struct atm_vcc *vcc)
 884 {
 885         int old_len;
 886         unsigned long flags;
 887
 888         SKB_CB(skb)->vcc = vcc;
 889
 890         spin_lock_irqsave(&card->tx_queue_lock, flags);
 891         old_len = skb_queue_len(&card->tx_queue[port]);
 892         skb_queue_tail(&card->tx_queue[port], skb);
 893         if (!old_len)
 894                 card->tx_mask |= (1 << port);
 895         spin_unlock_irqrestore(&card->tx_queue_lock, flags);
 896
 897         /* Theoretically we could just schedule the tasklet here, but
 898            that introduces latency we don't want -- it's noticeable */
 899         if (!old_len)
 900                 fpga_tx(card);
 901 }
 902
 903 static uint32_t fpga_tx(struct solos_card *card)
 904 {
 905         uint32_t tx_pending, card_flags;
 906         uint32_t tx_started = 0;
 907         struct sk_buff *skb;
 908         struct atm_vcc *vcc;
 909         unsigned char port;
 910         unsigned long flags;
 911
 912         spin_lock_irqsave(&card->tx_lock, flags);
 913
 914         card_flags = ioread32(card->config_regs + FLAGS_ADDR);
 915         /*
 916          * The queue lock is required for _writing_ to tx_mask, but we're
 917          * OK to read it here without locking. The only potential update
 918          * that we could race with is in fpga_queue() where it sets a bit
 919          * for a new port... but it's going to call this function again if
 920          * it's doing that, anyway.
 921          */
 922         tx_pending = card->tx_mask & ~card_flags;
 923
 924         for (port = 0; tx_pending; tx_pending >>= 1, port++) {
 925                 if (tx_pending & 1) {
 926                         struct sk_buff *oldskb = card->tx_skb[port];
 927                         if (oldskb)
 928                                 pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
 929                                                  oldskb->len, PCI_DMA_TODEVICE);
 930
 931                         spin_lock(&card->tx_queue_lock);
 932                         skb = skb_dequeue(&card->tx_queue[port]);
 933                         if (!skb)
 934                                 card->tx_mask &= ~(1 << port);
 935                         spin_unlock(&card->tx_queue_lock);
 936
 937                         if (skb && !card->using_dma) {
 938                                 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
 939                                 tx_started |= 1 << port;
 940                                 oldskb = skb; /* We're done with this skb already */
 941                         } else if (skb && card->using_dma) {
 942                                 SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
 943                                                                        skb->len, PCI_DMA_TODEVICE);
 944                                 iowrite32(SKB_CB(skb)->dma_addr,
 945                                           card->config_regs + TX_DMA_ADDR(port));
 946                         }
 947
 948                         if (!oldskb)
 949                                 continue;
 950
 951                         /* Clean up and free oldskb now it's gone */
 952                         if (atmdebug) {
 953                                 dev_info(&card->dev->dev, "Transmitted: port %d\n",
 954                                          port);
 955                                 print_buffer(oldskb);
 956                         }
 957
 958                         vcc = SKB_CB(oldskb)->vcc;
 959
 960                         if (vcc) {
 961                                 atomic_inc(&vcc->stats->tx);
 962                                 solos_pop(vcc, oldskb);
 963                         } else
 964                                 dev_kfree_skb_irq(oldskb);
 965
 966                 }
 967         }
 968         /* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
 969         if (tx_started)
 970                 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
 971
 972         spin_unlock_irqrestore(&card->tx_lock, flags);
 973         return card_flags;
 974 }
 975
 976 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
 977 {
 978         struct solos_card *card = vcc->dev->dev_data;
 979         struct pkt_hdr *header;
 980         int pktlen;
 981
 982         pktlen = skb->len;
 983         if (pktlen > (BUF_SIZE - sizeof(*header))) {
 984                 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
 985                 solos_pop(vcc, skb);
 986                 return 0;
 987         }
 988
 989         if (!skb_clone_writable(skb, sizeof(*header))) {
 990                 int expand_by = 0;
 991                 int ret;
 992
 993                 if (skb_headroom(skb) < sizeof(*header))
 994                         expand_by = sizeof(*header) - skb_headroom(skb);
 995
 996                 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
 997                 if (ret) {
 998                         dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
 999                         solos_pop(vcc, skb);
1000                         return ret;
1001                 }
1002         }
1003
1004         header = (void *)skb_push(skb, sizeof(*header));
1005
1006         /* This does _not_ include the size of the header */
1007         header->size = cpu_to_le16(pktlen);
1008         header->vpi = cpu_to_le16(vcc->vpi);
1009         header->vci = cpu_to_le16(vcc->vci);
1010         header->type = cpu_to_le16(PKT_DATA);
1011
1012         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1013
1014         return 0;
1015 }
1016
1017 static struct atmdev_ops fpga_ops = {
1018         .open =         popen,
1019         .close =        pclose,
1020         .ioctl =        NULL,
1021         .getsockopt =   NULL,
1022         .setsockopt =   NULL,
1023         .send =         psend,
1024         .send_oam =     NULL,
1025         .phy_put =      NULL,
1026         .phy_get =      NULL,
1027         .change_qos =   NULL,
1028         .proc_read =    NULL,
1029         .owner =        THIS_MODULE
1030 };
1031
1032 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1033 {
1034         int err, i;
1035         uint16_t fpga_ver;
1036         uint8_t major_ver, minor_ver;
1037         uint32_t data32;
1038         struct solos_card *card;
1039
1040         card = kzalloc(sizeof(*card), GFP_KERNEL);
1041         if (!card)
1042                 return -ENOMEM;
1043
1044         card->dev = dev;
1045         init_waitqueue_head(&card->fw_wq);
1046         init_waitqueue_head(&card->param_wq);
1047
1048         err = pci_enable_device(dev);
1049         if (err) {
1050                 dev_warn(&dev->dev,  "Failed to enable PCI device\n");
1051                 goto out;
1052         }
1053
1054         err = pci_set_dma_mask(dev, DMA_32BIT_MASK);
1055         if (err) {
1056                 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1057                 goto out;
1058         }
1059
1060         err = pci_request_regions(dev, "solos");
1061         if (err) {
1062                 dev_warn(&dev->dev, "Failed to request regions\n");
1063                 goto out;
1064         }
1065
1066         card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1067         if (!card->config_regs) {
1068                 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1069                 goto out_release_regions;
1070         }
1071         card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1072         if (!card->buffers) {
1073                 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1074                 goto out_unmap_config;
1075         }
1076
1077         if (reset) {
1078                 iowrite32(1, card->config_regs + FPGA_MODE);
1079                 data32 = ioread32(card->config_regs + FPGA_MODE);
1080
1081                 iowrite32(0, card->config_regs + FPGA_MODE);
1082                 data32 = ioread32(card->config_regs + FPGA_MODE);
1083         }
1084         //Fill Config Mem with zeros
1085         for(i = 0; i < 128; i += 4)
1086                 iowrite32(0, card->config_regs + i);
1087
1088         //Set RX empty flags
1089         iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1090
1091         data32 = ioread32(card->config_regs + FPGA_VER);
1092         fpga_ver = (data32 & 0x0000FFFF);
1093         major_ver = ((data32 & 0xFF000000) >> 24);
1094         minor_ver = ((data32 & 0x00FF0000) >> 16);
1095         dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1096                  major_ver, minor_ver, fpga_ver);
1097
1098         if (fpga_ver > 27)
1099                 card->using_dma = 1;
1100
1101         card->nr_ports = 2; /* FIXME: Detect daughterboard */
1102
1103         pci_set_drvdata(dev, card);
1104
1105         tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1106         spin_lock_init(&card->tx_lock);
1107         spin_lock_init(&card->tx_queue_lock);
1108         spin_lock_init(&card->cli_queue_lock);
1109         spin_lock_init(&card->param_queue_lock);
1110         INIT_LIST_HEAD(&card->param_queue);
1111
1112         err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1113                           "solos-pci", card);
1114         if (err) {
1115                 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1116                 goto out_unmap_both;
1117         }
1118
1119         iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1120
1121         if (fpga_upgrade)
1122                 flash_upgrade(card, 0);
1123
1124         if (firmware_upgrade)
1125                 flash_upgrade(card, 1);
1126
1127         err = atm_init(card);
1128         if (err)
1129                 goto out_free_irq;
1130
1131         return 0;
1132
1133  out_free_irq:
1134         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1135         free_irq(dev->irq, card);
1136         tasklet_kill(&card->tlet);
1137
1138  out_unmap_both:
1139         pci_set_drvdata(dev, NULL);
1140         pci_iounmap(dev, card->config_regs);
1141  out_unmap_config:
1142         pci_iounmap(dev, card->buffers);
1143  out_release_regions:
1144         pci_release_regions(dev);
1145  out:
1146         return err;
1147 }
1148
1149 static int atm_init(struct solos_card *card)
1150 {
1151         int i;
1152
1153         for (i = 0; i < card->nr_ports; i++) {
1154                 struct sk_buff *skb;
1155                 struct pkt_hdr *header;
1156
1157                 skb_queue_head_init(&card->tx_queue[i]);
1158                 skb_queue_head_init(&card->cli_queue[i]);
1159
1160                 card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
1161                 if (!card->atmdev[i]) {
1162                         dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1163                         atm_remove(card);
1164                         return -ENODEV;
1165                 }
1166                 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1167                         dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1168                 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1169                         dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1170
1171                 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1172
1173                 card->atmdev[i]->ci_range.vpi_bits = 8;
1174                 card->atmdev[i]->ci_range.vci_bits = 16;
1175                 card->atmdev[i]->dev_data = card;
1176                 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1177                 card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
1178
1179                 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1180                 if (!skb) {
1181                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1182                         continue;
1183                 }
1184
1185                 header = (void *)skb_put(skb, sizeof(*header));
1186
1187                 header->size = cpu_to_le16(0);
1188                 header->vpi = cpu_to_le16(0);
1189                 header->vci = cpu_to_le16(0);
1190                 header->type = cpu_to_le16(PKT_STATUS);
1191
1192                 fpga_queue(card, i, skb, NULL);
1193         }
1194         return 0;
1195 }
1196
1197 static void atm_remove(struct solos_card *card)
1198 {
1199         int i;
1200
1201         for (i = 0; i < card->nr_ports; i++) {
1202                 if (card->atmdev[i]) {
1203                         dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1204
1205                         sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1206                         atm_dev_deregister(card->atmdev[i]);
1207                 }
1208         }
1209 }
1210
1211 static void fpga_remove(struct pci_dev *dev)
1212 {
1213         struct solos_card *card = pci_get_drvdata(dev);
1214
1215         atm_remove(card);
1216
1217         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1218         free_irq(dev->irq, card);
1219         tasklet_kill(&card->tlet);
1220
1221         pci_iounmap(dev, card->buffers);
1222         pci_iounmap(dev, card->config_regs);
1223
1224         pci_release_regions(dev);
1225         pci_disable_device(dev);
1226
1227         pci_set_drvdata(dev, NULL);
1228         kfree(card);
1229 }
1230
1231 static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
1232         { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1233         { 0, }
1234 };
1235
1236 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1237
1238 static struct pci_driver fpga_driver = {
1239         .name =         "solos",
1240         .id_table =     fpga_pci_tbl,
1241         .probe =        fpga_probe,
1242         .remove =       fpga_remove,
1243 };
1244
1245
1246 static int __init solos_pci_init(void)
1247 {
1248         printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1249         return pci_register_driver(&fpga_driver);
1250 }
1251
1252 static void __exit solos_pci_exit(void)
1253 {
1254         pci_unregister_driver(&fpga_driver);
1255         printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1256 }
1257
1258 module_init(solos_pci_init);
1259 module_exit(solos_pci_exit);