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         if (!strcmp(str, "ERROR")) {
 344                 dev_dbg(&card->dev->dev, "Status packet indicated Solos error on port %d (starting up?)\n",
 345                          port);
 346                 return 0;
 347         }
 348
 349         rate_up = simple_strtol(str, &end, 10);
 350         if (*end)
 351                 return -EIO;
 352
 353         str = next_string(skb);
 354         if (!str)
 355                 return -EIO;
 356         rate_down = simple_strtol(str, &end, 10);
 357         if (*end)
 358                 return -EIO;
 359
 360         state_str = next_string(skb);
 361         if (!state_str)
 362                 return -EIO;
 363         if (!strcmp(state_str, "Showtime"))
 364                 state = ATM_PHY_SIG_FOUND;
 365         else {
 366                 state = ATM_PHY_SIG_LOST;
 367                 release_vccs(card->atmdev[port]);
 368         }
 369
 370         if (state == ATM_PHY_SIG_LOST) {
 371                 dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
 372         } else {
 373                 char *snr, *attn;
 374
 375                 snr = next_string(skb);
 376                 if (!str)
 377                         return -EIO;
 378                 attn = next_string(skb);
 379                 if (!attn)
 380                         return -EIO;
 381
 382                 dev_info(&card->dev->dev, "Port %d: %s @%d/%d kb/s%s%s%s%s\n",
 383                          port, state_str, rate_down/1000, rate_up/1000,
 384                          snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
 385         }
 386         card->atmdev[port]->link_rate = rate_down / 424;
 387         card->atmdev[port]->signal = state;
 388
 389         return 0;
 390 }
 391
 392 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
 393 {
 394         struct solos_param *prm;
 395         unsigned long flags;
 396         int cmdpid;
 397         int found = 0;
 398
 399         if (skb->len < 7)
 400                 return 0;
 401
 402         if (skb->data[0] != 'L'    || !isdigit(skb->data[1]) ||
 403             !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
 404             !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
 405             skb->data[6] != '\n')
 406                 return 0;
 407
 408         cmdpid = simple_strtol(&skb->data[1], NULL, 10);
 409
 410         spin_lock_irqsave(&card->param_queue_lock, flags);
 411         list_for_each_entry(prm, &card->param_queue, list) {
 412                 if (prm->port == port && prm->pid == cmdpid) {
 413                         prm->response = skb;
 414                         skb_pull(skb, 7);
 415                         wake_up(&card->param_wq);
 416                         found = 1;
 417                         break;
 418                 }
 419         }
 420         spin_unlock_irqrestore(&card->param_queue_lock, flags);
 421         return found;
 422 }
 423
 424 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
 425                             char *buf)
 426 {
 427         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 428         struct solos_card *card = atmdev->dev_data;
 429         struct sk_buff *skb;
 430
 431         spin_lock(&card->cli_queue_lock);
 432         skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
 433         spin_unlock(&card->cli_queue_lock);
 434         if(skb == NULL)
 435                 return sprintf(buf, "No data.\n");
 436
 437         memcpy(buf, skb->data, skb->len);
 438         dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
 439
 440         kfree_skb(skb);
 441         return skb->len;
 442 }
 443
 444 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
 445 {
 446         struct sk_buff *skb;
 447         struct pkt_hdr *header;
 448
 449         if (size > (BUF_SIZE - sizeof(*header))) {
 450                 dev_dbg(&card->dev->dev, "Command is too big.  Dropping request\n");
 451                 return 0;
 452         }
 453         skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
 454         if (!skb) {
 455                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
 456                 return 0;
 457         }
 458
 459         header = (void *)skb_put(skb, sizeof(*header));
 460
 461         header->size = cpu_to_le16(size);
 462         header->vpi = cpu_to_le16(0);
 463         header->vci = cpu_to_le16(0);
 464         header->type = cpu_to_le16(PKT_COMMAND);
 465
 466         memcpy(skb_put(skb, size), buf, size);
 467
 468         fpga_queue(card, dev, skb, NULL);
 469
 470         return 0;
 471 }
 472
 473 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
 474                              const char *buf, size_t count)
 475 {
 476         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 477         struct solos_card *card = atmdev->dev_data;
 478         int err;
 479
 480         err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
 481
 482         return err?:count;
 483 }
 484
 485 static DEVICE_ATTR(console, 0644, console_show, console_store);
 486
 487
 488 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
 489 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
 490
 491 #include "solos-attrlist.c"
 492
 493 #undef SOLOS_ATTR_RO
 494 #undef SOLOS_ATTR_RW
 495
 496 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
 497 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
 498
 499 static struct attribute *solos_attrs[] = {
 500 #include "solos-attrlist.c"
 501         NULL
 502 };
 503
 504 static struct attribute_group solos_attr_group = {
 505         .attrs = solos_attrs,
 506         .name = "parameters",
 507 };
 508
 509 static int flash_upgrade(struct solos_card *card, int chip)
 510 {
 511         const struct firmware *fw;
 512         const char *fw_name;
 513         uint32_t data32 = 0;
 514         int blocksize = 0;
 515         int numblocks = 0;
 516         int offset;
 517
 518         if (chip == 0) {
 519                 fw_name = "solos-FPGA.bin";
 520                 blocksize = FPGA_BLOCK;
 521         } else {
 522                 fw_name = "solos-Firmware.bin";
 523                 blocksize = SOLOS_BLOCK;
 524         }
 525
 526         if (request_firmware(&fw, fw_name, &card->dev->dev))
 527                 return -ENOENT;
 528
 529         dev_info(&card->dev->dev, "Flash upgrade starting\n");
 530
 531         numblocks = fw->size / blocksize;
 532         dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
 533         dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
 534
 535         dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
 536         iowrite32(1, card->config_regs + FPGA_MODE);
 537         data32 = ioread32(card->config_regs + FPGA_MODE);
 538
 539         /* Set mode to Chip Erase */
 540         dev_info(&card->dev->dev, "Set FPGA Flash mode to %s Chip Erase\n",
 541                  chip?"Solos":"FPGA");
 542         iowrite32((chip * 2), card->config_regs + FLASH_MODE);
 543
 544
 545         iowrite32(1, card->config_regs + WRITE_FLASH);
 546         wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
 547
 548         for (offset = 0; offset < fw->size; offset += blocksize) {
 549                 int i;
 550
 551                 /* Clear write flag */
 552                 iowrite32(0, card->config_regs + WRITE_FLASH);
 553
 554                 /* Set mode to Block Write */
 555                 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
 556                 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
 557
 558                 /* Copy block to buffer, swapping each 16 bits */
 559                 for(i = 0; i < blocksize; i += 4) {
 560                         uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
 561                         iowrite32(word, RX_BUF(card, 3) + i);
 562                 }
 563
 564                 /* Specify block number and then trigger flash write */
 565                 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
 566                 iowrite32(1, card->config_regs + WRITE_FLASH);
 567                 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
 568         }
 569
 570         release_firmware(fw);
 571         iowrite32(0, card->config_regs + WRITE_FLASH);
 572         iowrite32(0, card->config_regs + FPGA_MODE);
 573         iowrite32(0, card->config_regs + FLASH_MODE);
 574         dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
 575         return 0;
 576 }
 577
 578 static irqreturn_t solos_irq(int irq, void *dev_id)
 579 {
 580         struct solos_card *card = dev_id;
 581         int handled = 1;
 582
 583         iowrite32(0, card->config_regs + IRQ_CLEAR);
 584
 585         /* If we're up and running, just kick the tasklet to process TX/RX */
 586         if (card->atmdev[0])
 587                 tasklet_schedule(&card->tlet);
 588         else
 589                 wake_up(&card->fw_wq);
 590
 591         return IRQ_RETVAL(handled);
 592 }
 593
 594 void solos_bh(unsigned long card_arg)
 595 {
 596         struct solos_card *card = (void *)card_arg;
 597         uint32_t card_flags;
 598         uint32_t rx_done = 0;
 599         int port;
 600
 601         /*
 602          * Since fpga_tx() is going to need to read the flags under its lock,
 603          * it can return them to us so that we don't have to hit PCI MMIO
 604          * again for the same information
 605          */
 606         card_flags = fpga_tx(card);
 607
 608         for (port = 0; port < card->nr_ports; port++) {
 609                 if (card_flags & (0x10 << port)) {
 610                         struct pkt_hdr _hdr, *header;
 611                         struct sk_buff *skb;
 612                         struct atm_vcc *vcc;
 613                         int size;
 614
 615                         if (card->using_dma) {
 616                                 skb = card->rx_skb[port];
 617                                 card->rx_skb[port] = NULL;
 618
 619                                 pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
 620                                                  RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
 621
 622                                 header = (void *)skb->data;
 623                                 size = le16_to_cpu(header->size);
 624                                 skb_put(skb, size + sizeof(*header));
 625                                 skb_pull(skb, sizeof(*header));
 626                         } else {
 627                                 header = &_hdr;
 628
 629                                 rx_done |= 0x10 << port;
 630
 631                                 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
 632
 633                                 size = le16_to_cpu(header->size);
 634
 635                                 skb = alloc_skb(size + 1, GFP_ATOMIC);
 636                                 if (!skb) {
 637                                         if (net_ratelimit())
 638                                                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
 639                                         continue;
 640                                 }
 641
 642                                 memcpy_fromio(skb_put(skb, size),
 643                                               RX_BUF(card, port) + sizeof(*header),
 644                                               size);
 645                         }
 646                         if (atmdebug) {
 647                                 dev_info(&card->dev->dev, "Received: device %d\n", port);
 648                                 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
 649                                          size, le16_to_cpu(header->vpi),
 650                                          le16_to_cpu(header->vci));
 651                                 print_buffer(skb);
 652                         }
 653
 654                         switch (le16_to_cpu(header->type)) {
 655                         case PKT_DATA:
 656                                 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
 657                                                le16_to_cpu(header->vci));
 658                                 if (!vcc) {
 659                                         if (net_ratelimit())
 660                                                 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
 661                                                          le16_to_cpu(header->vci), le16_to_cpu(header->vpi),
 662                                                          port);
 663                                         continue;
 664                                 }
 665                                 atm_charge(vcc, skb->truesize);
 666                                 vcc->push(vcc, skb);
 667                                 atomic_inc(&vcc->stats->rx);
 668                                 break;
 669
 670                         case PKT_STATUS:
 671                                 if (process_status(card, port, skb) &&
 672                                     net_ratelimit()) {
 673                                         dev_warn(&card->dev->dev, "Bad status packet of %d bytes on port %d:\n", skb->len, port);
 674                                         print_buffer(skb);
 675                                 }
 676                                 dev_kfree_skb_any(skb);
 677                                 break;
 678
 679                         case PKT_COMMAND:
 680                         default: /* FIXME: Not really, surely? */
 681                                 if (process_command(card, port, skb))
 682                                         break;
 683                                 spin_lock(&card->cli_queue_lock);
 684                                 if (skb_queue_len(&card->cli_queue[port]) > 10) {
 685                                         if (net_ratelimit())
 686                                                 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
 687                                                          port);
 688                                         dev_kfree_skb_any(skb);
 689                                 } else
 690                                         skb_queue_tail(&card->cli_queue[port], skb);
 691                                 spin_unlock(&card->cli_queue_lock);
 692                                 break;
 693                         }
 694                 }
 695                 /* Allocate RX skbs for any ports which need them */
 696                 if (card->using_dma && card->atmdev[port] &&
 697                     !card->rx_skb[port]) {
 698                         struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
 699                         if (skb) {
 700                                 SKB_CB(skb)->dma_addr =
 701                                         pci_map_single(card->dev, skb->data,
 702                                                        RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
 703                                 iowrite32(SKB_CB(skb)->dma_addr,
 704                                           card->config_regs + RX_DMA_ADDR(port));
 705                                 card->rx_skb[port] = skb;
 706                         } else {
 707                                 if (net_ratelimit())
 708                                         dev_warn(&card->dev->dev, "Failed to allocate RX skb");
 709
 710                                 /* We'll have to try again later */
 711                                 tasklet_schedule(&card->tlet);
 712                         }
 713                 }
 714         }
 715         if (rx_done)
 716                 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
 717
 718         return;
 719 }
 720
 721 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
 722 {
 723         struct hlist_head *head;
 724         struct atm_vcc *vcc = NULL;
 725         struct hlist_node *node;
 726         struct sock *s;
 727
 728         read_lock(&vcc_sklist_lock);
 729         head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
 730         sk_for_each(s, node, head) {
 731                 vcc = atm_sk(s);
 732                 if (vcc->dev == dev && vcc->vci == vci &&
 733                     vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
 734                         goto out;
 735         }
 736         vcc = NULL;
 737  out:
 738         read_unlock(&vcc_sklist_lock);
 739         return vcc;
 740 }
 741
 742 static int list_vccs(int vci)
 743 {
 744         struct hlist_head *head;
 745         struct atm_vcc *vcc;
 746         struct hlist_node *node;
 747         struct sock *s;
 748         int num_found = 0;
 749         int i;
 750
 751         read_lock(&vcc_sklist_lock);
 752         if (vci != 0){
 753                 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
 754                 sk_for_each(s, node, head) {
 755                         num_found ++;
 756                         vcc = atm_sk(s);
 757                         printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
 758                                vcc->dev->number,
 759                                vcc->vpi,
 760                                vcc->vci);
 761                 }
 762         } else {
 763                 for(i = 0; i < VCC_HTABLE_SIZE; i++){
 764                         head = &vcc_hash[i];
 765                         sk_for_each(s, node, head) {
 766                                 num_found ++;
 767                                 vcc = atm_sk(s);
 768                                 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
 769                                        vcc->dev->number,
 770                                        vcc->vpi,
 771                                        vcc->vci);
 772                         }
 773                 }
 774         }
 775         read_unlock(&vcc_sklist_lock);
 776         return num_found;
 777 }
 778
 779 static void release_vccs(struct atm_dev *dev)
 780 {
 781         int i;
 782
 783         write_lock_irq(&vcc_sklist_lock);
 784         for (i = 0; i < VCC_HTABLE_SIZE; i++) {
 785                 struct hlist_head *head = &vcc_hash[i];
 786                 struct hlist_node *node, *tmp;
 787                 struct sock *s;
 788                 struct atm_vcc *vcc;
 789
 790                 sk_for_each_safe(s, node, tmp, head) {
 791                         vcc = atm_sk(s);
 792                         if (vcc->dev == dev) {
 793                                 vcc_release_async(vcc, -EPIPE);
 794                                 sk_del_node_init(s);
 795                         }
 796                 }
 797         }
 798         write_unlock_irq(&vcc_sklist_lock);
 799 }
 800
 801
 802 static int popen(struct atm_vcc *vcc)
 803 {
 804         struct solos_card *card = vcc->dev->dev_data;
 805         struct sk_buff *skb;
 806         struct pkt_hdr *header;
 807
 808         if (vcc->qos.aal != ATM_AAL5) {
 809                 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
 810                          vcc->qos.aal);
 811                 return -EINVAL;
 812         }
 813
 814         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
 815         if (!skb && net_ratelimit()) {
 816                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
 817                 return -ENOMEM;
 818         }
 819         header = (void *)skb_put(skb, sizeof(*header));
 820
 821         header->size = cpu_to_le16(0);
 822         header->vpi = cpu_to_le16(vcc->vpi);
 823         header->vci = cpu_to_le16(vcc->vci);
 824         header->type = cpu_to_le16(PKT_POPEN);
 825
 826         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
 827
 828         set_bit(ATM_VF_ADDR, &vcc->flags);
 829         set_bit(ATM_VF_READY, &vcc->flags);
 830         list_vccs(0);
 831
 832
 833         return 0;
 834 }
 835
 836 static void pclose(struct atm_vcc *vcc)
 837 {
 838         struct solos_card *card = vcc->dev->dev_data;
 839         struct sk_buff *skb;
 840         struct pkt_hdr *header;
 841
 842         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
 843         if (!skb) {
 844                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
 845                 return;
 846         }
 847         header = (void *)skb_put(skb, sizeof(*header));
 848
 849         header->size = cpu_to_le16(0);
 850         header->vpi = cpu_to_le16(vcc->vpi);
 851         header->vci = cpu_to_le16(vcc->vci);
 852         header->type = cpu_to_le16(PKT_PCLOSE);
 853
 854         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
 855
 856         clear_bit(ATM_VF_ADDR, &vcc->flags);
 857         clear_bit(ATM_VF_READY, &vcc->flags);
 858
 859         return;
 860 }
 861
 862 static int print_buffer(struct sk_buff *buf)
 863 {
 864         int len,i;
 865         char msg[500];
 866         char item[10];
 867
 868         len = buf->len;
 869         for (i = 0; i < len; i++){
 870                 if(i % 8 == 0)
 871                         sprintf(msg, "%02X: ", i);
 872
 873                 sprintf(item,"%02X ",*(buf->data + i));
 874                 strcat(msg, item);
 875                 if(i % 8 == 7) {
 876                         sprintf(item, "\n");
 877                         strcat(msg, item);
 878                         printk(KERN_DEBUG "%s", msg);
 879                 }
 880         }
 881         if (i % 8 != 0) {
 882                 sprintf(item, "\n");
 883                 strcat(msg, item);
 884                 printk(KERN_DEBUG "%s", msg);
 885         }
 886         printk(KERN_DEBUG "\n");
 887
 888         return 0;
 889 }
 890
 891 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
 892                        struct atm_vcc *vcc)
 893 {
 894         int old_len;
 895         unsigned long flags;
 896
 897         SKB_CB(skb)->vcc = vcc;
 898
 899         spin_lock_irqsave(&card->tx_queue_lock, flags);
 900         old_len = skb_queue_len(&card->tx_queue[port]);
 901         skb_queue_tail(&card->tx_queue[port], skb);
 902         if (!old_len)
 903                 card->tx_mask |= (1 << port);
 904         spin_unlock_irqrestore(&card->tx_queue_lock, flags);
 905
 906         /* Theoretically we could just schedule the tasklet here, but
 907            that introduces latency we don't want -- it's noticeable */
 908         if (!old_len)
 909                 fpga_tx(card);
 910 }
 911
 912 static uint32_t fpga_tx(struct solos_card *card)
 913 {
 914         uint32_t tx_pending, card_flags;
 915         uint32_t tx_started = 0;
 916         struct sk_buff *skb;
 917         struct atm_vcc *vcc;
 918         unsigned char port;
 919         unsigned long flags;
 920
 921         spin_lock_irqsave(&card->tx_lock, flags);
 922
 923         card_flags = ioread32(card->config_regs + FLAGS_ADDR);
 924         /*
 925          * The queue lock is required for _writing_ to tx_mask, but we're
 926          * OK to read it here without locking. The only potential update
 927          * that we could race with is in fpga_queue() where it sets a bit
 928          * for a new port... but it's going to call this function again if
 929          * it's doing that, anyway.
 930          */
 931         tx_pending = card->tx_mask & ~card_flags;
 932
 933         for (port = 0; tx_pending; tx_pending >>= 1, port++) {
 934                 if (tx_pending & 1) {
 935                         struct sk_buff *oldskb = card->tx_skb[port];
 936                         if (oldskb)
 937                                 pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
 938                                                  oldskb->len, PCI_DMA_TODEVICE);
 939
 940                         spin_lock(&card->tx_queue_lock);
 941                         skb = skb_dequeue(&card->tx_queue[port]);
 942                         if (!skb)
 943                                 card->tx_mask &= ~(1 << port);
 944                         spin_unlock(&card->tx_queue_lock);
 945
 946                         if (skb && !card->using_dma) {
 947                                 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
 948                                 tx_started |= 1 << port;
 949                                 oldskb = skb; /* We're done with this skb already */
 950                         } else if (skb && card->using_dma) {
 951                                 SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
 952                                                                        skb->len, PCI_DMA_TODEVICE);
 953                                 iowrite32(SKB_CB(skb)->dma_addr,
 954                                           card->config_regs + TX_DMA_ADDR(port));
 955                         }
 956
 957                         if (!oldskb)
 958                                 continue;
 959
 960                         /* Clean up and free oldskb now it's gone */
 961                         if (atmdebug) {
 962                                 dev_info(&card->dev->dev, "Transmitted: port %d\n",
 963                                          port);
 964                                 print_buffer(oldskb);
 965                         }
 966
 967                         vcc = SKB_CB(oldskb)->vcc;
 968
 969                         if (vcc) {
 970                                 atomic_inc(&vcc->stats->tx);
 971                                 solos_pop(vcc, oldskb);
 972                         } else
 973                                 dev_kfree_skb_irq(oldskb);
 974
 975                 }
 976         }
 977         /* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
 978         if (tx_started)
 979                 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
 980
 981         spin_unlock_irqrestore(&card->tx_lock, flags);
 982         return card_flags;
 983 }
 984
 985 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
 986 {
 987         struct solos_card *card = vcc->dev->dev_data;
 988         struct pkt_hdr *header;
 989         int pktlen;
 990
 991         pktlen = skb->len;
 992         if (pktlen > (BUF_SIZE - sizeof(*header))) {
 993                 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
 994                 solos_pop(vcc, skb);
 995                 return 0;
 996         }
 997
 998         if (!skb_clone_writable(skb, sizeof(*header))) {
 999                 int expand_by = 0;
1000                 int ret;
1001
1002                 if (skb_headroom(skb) < sizeof(*header))
1003                         expand_by = sizeof(*header) - skb_headroom(skb);
1004
1005                 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1006                 if (ret) {
1007                         dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1008                         solos_pop(vcc, skb);
1009                         return ret;
1010                 }
1011         }
1012
1013         header = (void *)skb_push(skb, sizeof(*header));
1014
1015         /* This does _not_ include the size of the header */
1016         header->size = cpu_to_le16(pktlen);
1017         header->vpi = cpu_to_le16(vcc->vpi);
1018         header->vci = cpu_to_le16(vcc->vci);
1019         header->type = cpu_to_le16(PKT_DATA);
1020
1021         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1022
1023         return 0;
1024 }
1025
1026 static struct atmdev_ops fpga_ops = {
1027         .open =         popen,
1028         .close =        pclose,
1029         .ioctl =        NULL,
1030         .getsockopt =   NULL,
1031         .setsockopt =   NULL,
1032         .send =         psend,
1033         .send_oam =     NULL,
1034         .phy_put =      NULL,
1035         .phy_get =      NULL,
1036         .change_qos =   NULL,
1037         .proc_read =    NULL,
1038         .owner =        THIS_MODULE
1039 };
1040
1041 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1042 {
1043         int err, i;
1044         uint16_t fpga_ver;
1045         uint8_t major_ver, minor_ver;
1046         uint32_t data32;
1047         struct solos_card *card;
1048
1049         card = kzalloc(sizeof(*card), GFP_KERNEL);
1050         if (!card)
1051                 return -ENOMEM;
1052
1053         card->dev = dev;
1054         init_waitqueue_head(&card->fw_wq);
1055         init_waitqueue_head(&card->param_wq);
1056
1057         err = pci_enable_device(dev);
1058         if (err) {
1059                 dev_warn(&dev->dev,  "Failed to enable PCI device\n");
1060                 goto out;
1061         }
1062
1063         err = pci_set_dma_mask(dev, DMA_32BIT_MASK);
1064         if (err) {
1065                 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1066                 goto out;
1067         }
1068
1069         err = pci_request_regions(dev, "solos");
1070         if (err) {
1071                 dev_warn(&dev->dev, "Failed to request regions\n");
1072                 goto out;
1073         }
1074
1075         card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1076         if (!card->config_regs) {
1077                 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1078                 goto out_release_regions;
1079         }
1080         card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1081         if (!card->buffers) {
1082                 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1083                 goto out_unmap_config;
1084         }
1085
1086         if (reset) {
1087                 iowrite32(1, card->config_regs + FPGA_MODE);
1088                 data32 = ioread32(card->config_regs + FPGA_MODE);
1089
1090                 iowrite32(0, card->config_regs + FPGA_MODE);
1091                 data32 = ioread32(card->config_regs + FPGA_MODE);
1092         }
1093         //Fill Config Mem with zeros
1094         for(i = 0; i < 128; i += 4)
1095                 iowrite32(0, card->config_regs + i);
1096
1097         //Set RX empty flags
1098         iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1099
1100         data32 = ioread32(card->config_regs + FPGA_VER);
1101         fpga_ver = (data32 & 0x0000FFFF);
1102         major_ver = ((data32 & 0xFF000000) >> 24);
1103         minor_ver = ((data32 & 0x00FF0000) >> 16);
1104         dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1105                  major_ver, minor_ver, fpga_ver);
1106
1107         if (fpga_ver > 27)
1108                 card->using_dma = 1;
1109
1110         card->nr_ports = 2; /* FIXME: Detect daughterboard */
1111
1112         pci_set_drvdata(dev, card);
1113
1114         tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1115         spin_lock_init(&card->tx_lock);
1116         spin_lock_init(&card->tx_queue_lock);
1117         spin_lock_init(&card->cli_queue_lock);
1118         spin_lock_init(&card->param_queue_lock);
1119         INIT_LIST_HEAD(&card->param_queue);
1120
1121         err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1122                           "solos-pci", card);
1123         if (err) {
1124                 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1125                 goto out_unmap_both;
1126         }
1127
1128         iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1129
1130         if (fpga_upgrade)
1131                 flash_upgrade(card, 0);
1132
1133         if (firmware_upgrade)
1134                 flash_upgrade(card, 1);
1135
1136         err = atm_init(card);
1137         if (err)
1138                 goto out_free_irq;
1139
1140         return 0;
1141
1142  out_free_irq:
1143         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1144         free_irq(dev->irq, card);
1145         tasklet_kill(&card->tlet);
1146
1147  out_unmap_both:
1148         pci_set_drvdata(dev, NULL);
1149         pci_iounmap(dev, card->config_regs);
1150  out_unmap_config:
1151         pci_iounmap(dev, card->buffers);
1152  out_release_regions:
1153         pci_release_regions(dev);
1154  out:
1155         return err;
1156 }
1157
1158 static int atm_init(struct solos_card *card)
1159 {
1160         int i;
1161
1162         for (i = 0; i < card->nr_ports; i++) {
1163                 struct sk_buff *skb;
1164                 struct pkt_hdr *header;
1165
1166                 skb_queue_head_init(&card->tx_queue[i]);
1167                 skb_queue_head_init(&card->cli_queue[i]);
1168
1169                 card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
1170                 if (!card->atmdev[i]) {
1171                         dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1172                         atm_remove(card);
1173                         return -ENODEV;
1174                 }
1175                 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1176                         dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1177                 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1178                         dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1179
1180                 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1181
1182                 card->atmdev[i]->ci_range.vpi_bits = 8;
1183                 card->atmdev[i]->ci_range.vci_bits = 16;
1184                 card->atmdev[i]->dev_data = card;
1185                 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1186                 card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
1187
1188                 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1189                 if (!skb) {
1190                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1191                         continue;
1192                 }
1193
1194                 header = (void *)skb_put(skb, sizeof(*header));
1195
1196                 header->size = cpu_to_le16(0);
1197                 header->vpi = cpu_to_le16(0);
1198                 header->vci = cpu_to_le16(0);
1199                 header->type = cpu_to_le16(PKT_STATUS);
1200
1201                 fpga_queue(card, i, skb, NULL);
1202         }
1203         return 0;
1204 }
1205
1206 static void atm_remove(struct solos_card *card)
1207 {
1208         int i;
1209
1210         for (i = 0; i < card->nr_ports; i++) {
1211                 if (card->atmdev[i]) {
1212                         dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1213
1214                         sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1215                         atm_dev_deregister(card->atmdev[i]);
1216                 }
1217         }
1218 }
1219
1220 static void fpga_remove(struct pci_dev *dev)
1221 {
1222         struct solos_card *card = pci_get_drvdata(dev);
1223
1224         atm_remove(card);
1225
1226         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1227         free_irq(dev->irq, card);
1228         tasklet_kill(&card->tlet);
1229
1230         pci_iounmap(dev, card->buffers);
1231         pci_iounmap(dev, card->config_regs);
1232
1233         pci_release_regions(dev);
1234         pci_disable_device(dev);
1235
1236         pci_set_drvdata(dev, NULL);
1237         kfree(card);
1238 }
1239
1240 static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
1241         { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1242         { 0, }
1243 };
1244
1245 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1246
1247 static struct pci_driver fpga_driver = {
1248         .name =         "solos",
1249         .id_table =     fpga_pci_tbl,
1250         .probe =        fpga_probe,
1251         .remove =       fpga_remove,
1252 };
1253
1254
1255 static int __init solos_pci_init(void)
1256 {
1257         printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1258         return pci_register_driver(&fpga_driver);
1259 }
1260
1261 static void __exit solos_pci_exit(void)
1262 {
1263         pci_unregister_driver(&fpga_driver);
1264         printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1265 }
1266
1267 module_init(solos_pci_init);
1268 module_exit(solos_pci_exit);