git.oblomov.eu Git - linux-2.6/blob - drivers/atm/solos-pci.c

   1 /*
   2  * Driver for the Solos PCI ADSL2+ card, designed to support Linux by
   3  *  Traverse Technologies -- http://www.traverse.com.au/
   4  *  Xrio Limited          -- http://www.xrio.com/
   5  *
   6  *
   7  * Copyright © 2008 Traverse Technologies
   8  * Copyright © 2008 Intel Corporation
   9  *
  10  * Authors: Nathan Williams <nathan@traverse.com.au>
  11  *          David Woodhouse <dwmw2@infradead.org>
  12  *          Treker Chen <treker@xrio.com>
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License
  16  * version 2, as published by the Free Software Foundation.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  */
  23
  24 #define DEBUG
  25 #define VERBOSE_DEBUG
  26
  27 #include <linux/interrupt.h>
  28 #include <linux/module.h>
  29 #include <linux/kernel.h>
  30 #include <linux/errno.h>
  31 #include <linux/ioport.h>
  32 #include <linux/types.h>
  33 #include <linux/pci.h>
  34 #include <linux/atm.h>
  35 #include <linux/atmdev.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/sysfs.h>
  38 #include <linux/device.h>
  39 #include <linux/kobject.h>
  40 #include <linux/firmware.h>
  41 #include <linux/ctype.h>
  42 #include <linux/swab.h>
  43
  44 #define VERSION "0.07"
  45 #define PTAG "solos-pci"
  46
  47 #define CONFIG_RAM_SIZE 128
  48 #define FLAGS_ADDR      0x7C
  49 #define IRQ_EN_ADDR     0x78
  50 #define FPGA_VER        0x74
  51 #define IRQ_CLEAR       0x70
  52 #define WRITE_FLASH     0x6C
  53 #define PORTS           0x68
  54 #define FLASH_BLOCK     0x64
  55 #define FLASH_BUSY      0x60
  56 #define FPGA_MODE       0x5C
  57 #define FLASH_MODE      0x58
  58
  59 #define DATA_RAM_SIZE   32768
  60 #define BUF_SIZE        4096
  61 #define FPGA_PAGE       528 /* FPGA flash page size*/
  62 #define SOLOS_PAGE      512 /* Solos flash page size*/
  63 #define FPGA_BLOCK      (FPGA_PAGE * 8) /* FPGA flash block size*/
  64 #define SOLOS_BLOCK     (SOLOS_PAGE * 8) /* Solos flash block size*/
  65
  66 #define RX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2)
  67 #define TX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2 + BUF_SIZE)
  68
  69 static int debug = 0;
  70 static int atmdebug = 0;
  71 static int firmware_upgrade = 0;
  72 static int fpga_upgrade = 0;
  73
  74 struct pkt_hdr {
  75         __le16 size;
  76         __le16 vpi;
  77         __le16 vci;
  78         __le16 type;
  79 };
  80
  81 #define PKT_DATA        0
  82 #define PKT_COMMAND     1
  83 #define PKT_POPEN       3
  84 #define PKT_PCLOSE      4
  85 #define PKT_STATUS      5
  86
  87 struct solos_card {
  88         void __iomem *config_regs;
  89         void __iomem *buffers;
  90         int nr_ports;
  91         struct pci_dev *dev;
  92         struct atm_dev *atmdev[4];
  93         struct tasklet_struct tlet;
  94         spinlock_t tx_lock;
  95         spinlock_t tx_queue_lock;
  96         spinlock_t cli_queue_lock;
  97         spinlock_t param_queue_lock;
  98         struct list_head param_queue;
  99         struct sk_buff_head tx_queue[4];
 100         struct sk_buff_head cli_queue[4];
 101         wait_queue_head_t param_wq;
 102         wait_queue_head_t fw_wq;
 103 };
 104
 105
 106 struct solos_param {
 107         struct list_head list;
 108         pid_t pid;
 109         int port;
 110         struct sk_buff *response;
 111         wait_queue_head_t wq;
 112 };
 113
 114 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
 115
 116 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
 117 MODULE_DESCRIPTION("Solos PCI driver");
 118 MODULE_VERSION(VERSION);
 119 MODULE_LICENSE("GPL");
 120 MODULE_PARM_DESC(debug, "Enable Loopback");
 121 MODULE_PARM_DESC(atmdebug, "Print ATM data");
 122 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
 123 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
 124 module_param(debug, int, 0444);
 125 module_param(atmdebug, int, 0644);
 126 module_param(firmware_upgrade, int, 0444);
 127 module_param(fpga_upgrade, int, 0444);
 128
 129 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
 130                        struct atm_vcc *vcc);
 131 static int fpga_tx(struct solos_card *);
 132 static irqreturn_t solos_irq(int irq, void *dev_id);
 133 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
 134 static int list_vccs(int vci);
 135 static void release_vccs(struct atm_dev *dev);
 136 static int atm_init(struct solos_card *);
 137 static void atm_remove(struct solos_card *);
 138 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
 139 static void solos_bh(unsigned long);
 140 static int print_buffer(struct sk_buff *buf);
 141
 142 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
 143 {
 144         if (vcc->pop)
 145                 vcc->pop(vcc, skb);
 146         else
 147                 dev_kfree_skb_any(skb);
 148 }
 149
 150 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
 151                                 char *buf)
 152 {
 153         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 154         struct solos_card *card = atmdev->dev_data;
 155         struct solos_param prm;
 156         struct sk_buff *skb;
 157         struct pkt_hdr *header;
 158         int buflen;
 159
 160         buflen = strlen(attr->attr.name) + 10;
 161
 162         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
 163         if (!skb) {
 164                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
 165                 return -ENOMEM;
 166         }
 167
 168         header = (void *)skb_put(skb, sizeof(*header));
 169
 170         buflen = snprintf((void *)&header[1], buflen - 1,
 171                           "L%05d\n%s\n", current->pid, attr->attr.name);
 172         skb_put(skb, buflen);
 173
 174         header->size = cpu_to_le16(buflen);
 175         header->vpi = cpu_to_le16(0);
 176         header->vci = cpu_to_le16(0);
 177         header->type = cpu_to_le16(PKT_COMMAND);
 178
 179         prm.pid = current->pid;
 180         prm.response = NULL;
 181         prm.port = SOLOS_CHAN(atmdev);
 182
 183         spin_lock_irq(&card->param_queue_lock);
 184         list_add(&prm.list, &card->param_queue);
 185         spin_unlock_irq(&card->param_queue_lock);
 186
 187         fpga_queue(card, prm.port, skb, NULL);
 188
 189         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
 190
 191         spin_lock_irq(&card->param_queue_lock);
 192         list_del(&prm.list);
 193         spin_unlock_irq(&card->param_queue_lock);
 194
 195         if (!prm.response)
 196                 return -EIO;
 197
 198         buflen = prm.response->len;
 199         memcpy(buf, prm.response->data, buflen);
 200         kfree_skb(prm.response);
 201
 202         return buflen;
 203 }
 204
 205 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
 206                                  const char *buf, size_t count)
 207 {
 208         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 209         struct solos_card *card = atmdev->dev_data;
 210         struct solos_param prm;
 211         struct sk_buff *skb;
 212         struct pkt_hdr *header;
 213         int buflen;
 214         ssize_t ret;
 215
 216         buflen = strlen(attr->attr.name) + 11 + count;
 217
 218         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
 219         if (!skb) {
 220                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
 221                 return -ENOMEM;
 222         }
 223
 224         header = (void *)skb_put(skb, sizeof(*header));
 225
 226         buflen = snprintf((void *)&header[1], buflen - 1,
 227                           "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
 228
 229         skb_put(skb, buflen);
 230         header->size = cpu_to_le16(buflen);
 231         header->vpi = cpu_to_le16(0);
 232         header->vci = cpu_to_le16(0);
 233         header->type = cpu_to_le16(PKT_COMMAND);
 234
 235         prm.pid = current->pid;
 236         prm.response = NULL;
 237         prm.port = SOLOS_CHAN(atmdev);
 238
 239         spin_lock_irq(&card->param_queue_lock);
 240         list_add(&prm.list, &card->param_queue);
 241         spin_unlock_irq(&card->param_queue_lock);
 242
 243         fpga_queue(card, prm.port, skb, NULL);
 244
 245         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
 246
 247         spin_lock_irq(&card->param_queue_lock);
 248         list_del(&prm.list);
 249         spin_unlock_irq(&card->param_queue_lock);
 250
 251         skb = prm.response;
 252
 253         if (!skb)
 254                 return -EIO;
 255
 256         buflen = skb->len;
 257
 258         /* Sometimes it has a newline, sometimes it doesn't. */
 259         if (skb->data[buflen - 1] == '\n')
 260                 buflen--;
 261
 262         if (buflen == 2 && !strncmp(skb->data, "OK", 2))
 263                 ret = count;
 264         else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
 265                 ret = -EIO;
 266         else {
 267                 /* We know we have enough space allocated for this; we allocated
 268                    it ourselves */
 269                 skb->data[buflen] = 0;
 270
 271                 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
 272                          skb->data);
 273                 ret = -EIO;
 274         }
 275         kfree_skb(skb);
 276
 277         return ret;
 278 }
 279
 280 static char *next_string(struct sk_buff *skb)
 281 {
 282         int i = 0;
 283         char *this = skb->data;
 284
 285         while (i < skb->len) {
 286                 if (this[i] == '\n') {
 287                         this[i] = 0;
 288                         skb_pull(skb, i);
 289                         return this;
 290                 }
 291         }
 292         return NULL;
 293 }
 294
 295 /*
 296  * Status packet has fields separated by \n, starting with a version number
 297  * for the information therein. Fields are....
 298  *
 299  *     packet version
 300  *     TxBitRate        (version >= 1)
 301  *     RxBitRate        (version >= 1)
 302  *     State            (version >= 1)
 303  */
 304 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
 305 {
 306         char *str, *end, *state_str;
 307         int ver, rate_up, rate_down, state, snr, attn;
 308
 309         if (!card->atmdev[port])
 310                 return -ENODEV;
 311
 312         str = next_string(skb);
 313         if (!str)
 314                 return -EIO;
 315
 316         ver = simple_strtol(str, NULL, 10);
 317         if (ver < 1) {
 318                 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
 319                          ver);
 320                 return -EIO;
 321         }
 322
 323         str = next_string(skb);
 324         rate_up = simple_strtol(str, &end, 10);
 325         if (*end)
 326                 return -EIO;
 327
 328         str = next_string(skb);
 329         rate_down = simple_strtol(str, &end, 10);
 330         if (*end)
 331                 return -EIO;
 332
 333         state_str = next_string(skb);
 334         if (!strcmp(state_str, "Showtime"))
 335                 state = ATM_PHY_SIG_FOUND;
 336         else {
 337                 state = ATM_PHY_SIG_LOST;
 338                 release_vccs(card->atmdev[port]);
 339         }
 340
 341         str = next_string(skb);
 342         snr = simple_strtol(str, &end, 10);
 343         if (*end)
 344                 return -EIO;
 345
 346         str = next_string(skb);
 347         attn = simple_strtol(str, &end, 10);
 348         if (*end)
 349                 return -EIO;
 350
 351         if (state == ATM_PHY_SIG_LOST && !rate_up && !rate_down)
 352                 dev_info(&card->dev->dev, "Port %d ATM state: %s\n",
 353                          port, state_str);
 354         else
 355                 dev_info(&card->dev->dev, "Port %d ATM state: %s (%d/%d kb/s, SNR %ddB, Attn %ddB)\n",
 356                          port, state_str, rate_up/1000, rate_down/1000,
 357                          snr, attn);
 358
 359         card->atmdev[port]->link_rate = rate_down;
 360         card->atmdev[port]->signal = state;
 361
 362         return 0;
 363 }
 364
 365 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
 366 {
 367         struct solos_param *prm;
 368         unsigned long flags;
 369         int cmdpid;
 370         int found = 0;
 371
 372         if (skb->len < 7)
 373                 return 0;
 374
 375         if (skb->data[0] != 'L'    || !isdigit(skb->data[1]) ||
 376             !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
 377             !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
 378             skb->data[6] != '\n')
 379                 return 0;
 380
 381         cmdpid = simple_strtol(&skb->data[1], NULL, 10);
 382
 383         spin_lock_irqsave(&card->param_queue_lock, flags);
 384         list_for_each_entry(prm, &card->param_queue, list) {
 385                 if (prm->port == port && prm->pid == cmdpid) {
 386                         prm->response = skb;
 387                         skb_pull(skb, 7);
 388                         wake_up(&card->param_wq);
 389                         found = 1;
 390                         break;
 391                 }
 392         }
 393         spin_unlock_irqrestore(&card->param_queue_lock, flags);
 394         return found;
 395 }
 396
 397 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
 398                             char *buf)
 399 {
 400         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 401         struct solos_card *card = atmdev->dev_data;
 402         struct sk_buff *skb;
 403
 404         spin_lock(&card->cli_queue_lock);
 405         skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
 406         spin_unlock(&card->cli_queue_lock);
 407         if(skb == NULL)
 408                 return sprintf(buf, "No data.\n");
 409
 410         memcpy(buf, skb->data, skb->len);
 411         dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
 412
 413         kfree_skb(skb);
 414         return skb->len;
 415 }
 416
 417 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
 418 {
 419         struct sk_buff *skb;
 420         struct pkt_hdr *header;
 421
 422 //      dev_dbg(&card->dev->dev, "size: %d\n", size);
 423
 424         if (size > (BUF_SIZE - sizeof(*header))) {
 425                 dev_dbg(&card->dev->dev, "Command is too big.  Dropping request\n");
 426                 return 0;
 427         }
 428         skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
 429         if (!skb) {
 430                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
 431                 return 0;
 432         }
 433
 434         header = (void *)skb_put(skb, sizeof(*header));
 435
 436         header->size = cpu_to_le16(size);
 437         header->vpi = cpu_to_le16(0);
 438         header->vci = cpu_to_le16(0);
 439         header->type = cpu_to_le16(PKT_COMMAND);
 440
 441         memcpy(skb_put(skb, size), buf, size);
 442
 443         fpga_queue(card, dev, skb, NULL);
 444
 445         return 0;
 446 }
 447
 448 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
 449                              const char *buf, size_t count)
 450 {
 451         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 452         struct solos_card *card = atmdev->dev_data;
 453         int err;
 454
 455         err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
 456
 457         return err?:count;
 458 }
 459
 460 static DEVICE_ATTR(console, 0644, console_show, console_store);
 461
 462
 463 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
 464 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
 465
 466 #include "solos-attrlist.c"
 467
 468 #undef SOLOS_ATTR_RO
 469 #undef SOLOS_ATTR_RW
 470
 471 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
 472 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
 473
 474 static struct attribute *solos_attrs[] = {
 475 #include "solos-attrlist.c"
 476         NULL
 477 };
 478
 479 static struct attribute_group solos_attr_group = {
 480         .attrs = solos_attrs,
 481         .name = "parameters",
 482 };
 483
 484 static int flash_upgrade(struct solos_card *card, int chip)
 485 {
 486         const struct firmware *fw;
 487         const char *fw_name;
 488         uint32_t data32 = 0;
 489         int blocksize = 0;
 490         int numblocks = 0;
 491         int offset;
 492
 493         if (chip == 0) {
 494                 fw_name = "solos-FPGA.bin";
 495                 blocksize = FPGA_BLOCK;
 496         } else {
 497                 fw_name = "solos-Firmware.bin";
 498                 blocksize = SOLOS_BLOCK;
 499         }
 500
 501         if (request_firmware(&fw, fw_name, &card->dev->dev))
 502                 return -ENOENT;
 503
 504         dev_info(&card->dev->dev, "Flash upgrade starting\n");
 505
 506         numblocks = fw->size / blocksize;
 507         dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
 508         dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
 509
 510         dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
 511         iowrite32(1, card->config_regs + FPGA_MODE);
 512         data32 = ioread32(card->config_regs + FPGA_MODE);
 513
 514         /* Set mode to Chip Erase */
 515         dev_info(&card->dev->dev, "Set FPGA Flash mode to %s Chip Erase\n",
 516                  chip?"Solos":"FPGA");
 517         iowrite32((chip * 2), card->config_regs + FLASH_MODE);
 518
 519
 520         iowrite32(1, card->config_regs + WRITE_FLASH);
 521         wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
 522
 523         for (offset = 0; offset < fw->size; offset += blocksize) {
 524                 int i;
 525
 526                 /* Clear write flag */
 527                 iowrite32(0, card->config_regs + WRITE_FLASH);
 528
 529                 /* Set mode to Block Write */
 530                 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
 531                 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
 532
 533                 /* Copy block to buffer, swapping each 16 bits */
 534                 for(i = 0; i < blocksize; i += 4) {
 535                         uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
 536                         iowrite32(word, RX_BUF(card, 3) + i);
 537                 }
 538
 539                 /* Specify block number and then trigger flash write */
 540                 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
 541                 iowrite32(1, card->config_regs + WRITE_FLASH);
 542                 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
 543         }
 544
 545         release_firmware(fw);
 546         iowrite32(0, card->config_regs + WRITE_FLASH);
 547         iowrite32(0, card->config_regs + FPGA_MODE);
 548         iowrite32(0, card->config_regs + FLASH_MODE);
 549         dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
 550         return 0;
 551 }
 552
 553 static irqreturn_t solos_irq(int irq, void *dev_id)
 554 {
 555         struct solos_card *card = dev_id;
 556         int handled = 1;
 557
 558         //ACK IRQ
 559         iowrite32(0, card->config_regs + IRQ_CLEAR);
 560         //Disable IRQs from FPGA
 561         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
 562
 563         if (card->atmdev[0])
 564                 tasklet_schedule(&card->tlet);
 565         else
 566                 wake_up(&card->fw_wq);
 567
 568         //Enable IRQs from FPGA
 569         iowrite32(1, card->config_regs + IRQ_EN_ADDR);
 570         return IRQ_RETVAL(handled);
 571 }
 572
 573 void solos_bh(unsigned long card_arg)
 574 {
 575         struct solos_card *card = (void *)card_arg;
 576         int port;
 577         uint32_t card_flags;
 578         uint32_t tx_mask;
 579         uint32_t rx_done = 0;
 580
 581         card_flags = ioread32(card->config_regs + FLAGS_ADDR);
 582
 583         /* The TX bits are set if the channel is busy; clear if not. We want to
 584            invoke fpga_tx() unless _all_ the bits for active channels are set */
 585         tx_mask = (1 << card->nr_ports) - 1;
 586         if ((card_flags & tx_mask) != tx_mask)
 587                 fpga_tx(card);
 588
 589         for (port = 0; port < card->nr_ports; port++) {
 590                 if (card_flags & (0x10 << port)) {
 591                         struct pkt_hdr header;
 592                         struct sk_buff *skb;
 593                         struct atm_vcc *vcc;
 594                         int size;
 595
 596                         rx_done |= 0x10 << port;
 597
 598                         memcpy_fromio(&header, RX_BUF(card, port), sizeof(header));
 599
 600                         size = le16_to_cpu(header.size);
 601
 602                         skb = alloc_skb(size + 1, GFP_ATOMIC);
 603                         if (!skb) {
 604                                 if (net_ratelimit())
 605                                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
 606                                 continue;
 607                         }
 608
 609                         memcpy_fromio(skb_put(skb, size),
 610                                       RX_BUF(card, port) + sizeof(header),
 611                                       size);
 612
 613                         if (atmdebug) {
 614                                 dev_info(&card->dev->dev, "Received: device %d\n", port);
 615                                 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
 616                                          size, le16_to_cpu(header.vpi),
 617                                          le16_to_cpu(header.vci));
 618                                 print_buffer(skb);
 619                         }
 620
 621                         switch (le16_to_cpu(header.type)) {
 622                         case PKT_DATA:
 623                                 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header.vpi),
 624                                                le16_to_cpu(header.vci));
 625                                 if (!vcc) {
 626                                         if (net_ratelimit())
 627                                                 dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
 628                                                          le16_to_cpu(header.vci), le16_to_cpu(header.vpi),
 629                                                          port);
 630                                         continue;
 631                                 }
 632                                 atm_charge(vcc, skb->truesize);
 633                                 vcc->push(vcc, skb);
 634                                 atomic_inc(&vcc->stats->rx);
 635                                 break;
 636
 637                         case PKT_STATUS:
 638                                 process_status(card, port, skb);
 639                                 dev_kfree_skb(skb);
 640                                 break;
 641
 642                         case PKT_COMMAND:
 643                         default: /* FIXME: Not really, surely? */
 644                                 if (process_command(card, port, skb))
 645                                         break;
 646                                 spin_lock(&card->cli_queue_lock);
 647                                 if (skb_queue_len(&card->cli_queue[port]) > 10) {
 648                                         if (net_ratelimit())
 649                                                 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
 650                                                          port);
 651                                 } else
 652                                         skb_queue_tail(&card->cli_queue[port], skb);
 653                                 spin_unlock(&card->cli_queue_lock);
 654                                 break;
 655                         }
 656                 }
 657         }
 658         if (rx_done)
 659                 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
 660
 661         return;
 662 }
 663
 664 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
 665 {
 666         struct hlist_head *head;
 667         struct atm_vcc *vcc = NULL;
 668         struct hlist_node *node;
 669         struct sock *s;
 670
 671         read_lock(&vcc_sklist_lock);
 672         head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
 673         sk_for_each(s, node, head) {
 674                 vcc = atm_sk(s);
 675                 if (vcc->dev == dev && vcc->vci == vci &&
 676                     vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
 677                         goto out;
 678         }
 679         vcc = NULL;
 680  out:
 681         read_unlock(&vcc_sklist_lock);
 682         return vcc;
 683 }
 684
 685 static int list_vccs(int vci)
 686 {
 687         struct hlist_head *head;
 688         struct atm_vcc *vcc;
 689         struct hlist_node *node;
 690         struct sock *s;
 691         int num_found = 0;
 692         int i;
 693
 694         read_lock(&vcc_sklist_lock);
 695         if (vci != 0){
 696                 head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
 697                 sk_for_each(s, node, head) {
 698                         num_found ++;
 699                         vcc = atm_sk(s);
 700                         printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
 701                                vcc->dev->number,
 702                                vcc->vpi,
 703                                vcc->vci);
 704                 }
 705         } else {
 706                 for(i = 0; i < VCC_HTABLE_SIZE; i++){
 707                         head = &vcc_hash[i];
 708                         sk_for_each(s, node, head) {
 709                                 num_found ++;
 710                                 vcc = atm_sk(s);
 711                                 printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
 712                                        vcc->dev->number,
 713                                        vcc->vpi,
 714                                        vcc->vci);
 715                         }
 716                 }
 717         }
 718         read_unlock(&vcc_sklist_lock);
 719         return num_found;
 720 }
 721
 722 static void release_vccs(struct atm_dev *dev)
 723 {
 724         int i;
 725
 726         write_lock_irq(&vcc_sklist_lock);
 727         for (i = 0; i < VCC_HTABLE_SIZE; i++) {
 728                 struct hlist_head *head = &vcc_hash[i];
 729                 struct hlist_node *node, *tmp;
 730                 struct sock *s;
 731                 struct atm_vcc *vcc;
 732
 733                 sk_for_each_safe(s, node, tmp, head) {
 734                         vcc = atm_sk(s);
 735                         if (vcc->dev == dev) {
 736                                 vcc_release_async(vcc, -EPIPE);
 737                                 sk_del_node_init(s);
 738                         }
 739                 }
 740         }
 741         write_unlock_irq(&vcc_sklist_lock);
 742 }
 743
 744
 745 static int popen(struct atm_vcc *vcc)
 746 {
 747         struct solos_card *card = vcc->dev->dev_data;
 748         struct sk_buff *skb;
 749         struct pkt_hdr *header;
 750
 751         if (vcc->qos.aal != ATM_AAL5) {
 752                 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
 753                          vcc->qos.aal);
 754                 return -EINVAL;
 755         }
 756
 757         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
 758         if (!skb && net_ratelimit()) {
 759                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
 760                 return -ENOMEM;
 761         }
 762         header = (void *)skb_put(skb, sizeof(*header));
 763
 764         header->size = cpu_to_le16(0);
 765         header->vpi = cpu_to_le16(vcc->vpi);
 766         header->vci = cpu_to_le16(vcc->vci);
 767         header->type = cpu_to_le16(PKT_POPEN);
 768
 769         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
 770
 771 //      dev_dbg(&card->dev->dev, "Open for vpi %d and vci %d on interface %d\n", vcc->vpi, vcc->vci, SOLOS_CHAN(vcc->dev));
 772         set_bit(ATM_VF_ADDR, &vcc->flags); // accept the vpi / vci
 773         set_bit(ATM_VF_READY, &vcc->flags);
 774         list_vccs(0);
 775
 776
 777         return 0;
 778 }
 779
 780 static void pclose(struct atm_vcc *vcc)
 781 {
 782         struct solos_card *card = vcc->dev->dev_data;
 783         struct sk_buff *skb;
 784         struct pkt_hdr *header;
 785
 786         skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
 787         if (!skb) {
 788                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
 789                 return;
 790         }
 791         header = (void *)skb_put(skb, sizeof(*header));
 792
 793         header->size = cpu_to_le16(0);
 794         header->vpi = cpu_to_le16(vcc->vpi);
 795         header->vci = cpu_to_le16(vcc->vci);
 796         header->type = cpu_to_le16(PKT_PCLOSE);
 797
 798         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
 799
 800 //      dev_dbg(&card->dev->dev, "Close for vpi %d and vci %d on interface %d\n", vcc->vpi, vcc->vci, SOLOS_CHAN(vcc->dev));
 801
 802         clear_bit(ATM_VF_ADDR, &vcc->flags);
 803         clear_bit(ATM_VF_READY, &vcc->flags);
 804
 805         return;
 806 }
 807
 808 static int print_buffer(struct sk_buff *buf)
 809 {
 810         int len,i;
 811         char msg[500];
 812         char item[10];
 813
 814         len = buf->len;
 815         for (i = 0; i < len; i++){
 816                 if(i % 8 == 0)
 817                         sprintf(msg, "%02X: ", i);
 818
 819                 sprintf(item,"%02X ",*(buf->data + i));
 820                 strcat(msg, item);
 821                 if(i % 8 == 7) {
 822                         sprintf(item, "\n");
 823                         strcat(msg, item);
 824                         printk(KERN_DEBUG "%s", msg);
 825                 }
 826         }
 827         if (i % 8 != 0) {
 828                 sprintf(item, "\n");
 829                 strcat(msg, item);
 830                 printk(KERN_DEBUG "%s", msg);
 831         }
 832         printk(KERN_DEBUG "\n");
 833
 834         return 0;
 835 }
 836
 837 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
 838                        struct atm_vcc *vcc)
 839 {
 840         int old_len;
 841
 842         *(void **)skb->cb = vcc;
 843
 844         spin_lock(&card->tx_queue_lock);
 845         old_len = skb_queue_len(&card->tx_queue[port]);
 846         skb_queue_tail(&card->tx_queue[port], skb);
 847         spin_unlock(&card->tx_queue_lock);
 848
 849         /* If TX might need to be started, do so */
 850         if (!old_len)
 851                 fpga_tx(card);
 852 }
 853
 854 static int fpga_tx(struct solos_card *card)
 855 {
 856         uint32_t tx_pending;
 857         uint32_t tx_started = 0;
 858         struct sk_buff *skb;
 859         struct atm_vcc *vcc;
 860         unsigned char port;
 861         unsigned long flags;
 862
 863         spin_lock_irqsave(&card->tx_lock, flags);
 864
 865         tx_pending = ioread32(card->config_regs + FLAGS_ADDR);
 866
 867         dev_vdbg(&card->dev->dev, "TX Flags are %X\n", tx_pending);
 868
 869         for (port = 0; port < card->nr_ports; port++) {
 870                 if (card->atmdev[port] && !(tx_pending & (1 << port))) {
 871
 872                         spin_lock(&card->tx_queue_lock);
 873                         skb = skb_dequeue(&card->tx_queue[port]);
 874                         spin_unlock(&card->tx_queue_lock);
 875
 876                         if (!skb)
 877                                 continue;
 878
 879                         if (atmdebug) {
 880                                 dev_info(&card->dev->dev, "Transmitted: port %d\n",
 881                                          port);
 882                                 print_buffer(skb);
 883                         }
 884                         memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
 885
 886                         vcc = *(void **)skb->cb;
 887
 888                         if (vcc) {
 889                                 atomic_inc(&vcc->stats->tx);
 890                                 solos_pop(vcc, skb);
 891                         } else
 892                                 dev_kfree_skb_irq(skb);
 893
 894                         tx_started |= 1 << port; //Set TX full flag
 895                 }
 896         }
 897         if (tx_started)
 898                 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
 899
 900         spin_unlock_irqrestore(&card->tx_lock, flags);
 901         return 0;
 902 }
 903
 904 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
 905 {
 906         struct solos_card *card = vcc->dev->dev_data;
 907         struct sk_buff *skb2 = NULL;
 908         struct pkt_hdr *header;
 909         int pktlen;
 910
 911         //dev_dbg(&card->dev->dev, "psend called.\n");
 912         //dev_dbg(&card->dev->dev, "dev,vpi,vci = %d,%d,%d\n",SOLOS_CHAN(vcc->dev),vcc->vpi,vcc->vci);
 913
 914         if (debug) {
 915                 skb2 = atm_alloc_charge(vcc, skb->len, GFP_ATOMIC);
 916                 if (skb2) {
 917                         memcpy(skb2->data, skb->data, skb->len);
 918                         skb_put(skb2, skb->len);
 919                         vcc->push(vcc, skb2);
 920                         atomic_inc(&vcc->stats->rx);
 921                 }
 922                 atomic_inc(&vcc->stats->tx);
 923                 solos_pop(vcc, skb);
 924                 return 0;
 925         }
 926
 927         pktlen = skb->len;
 928         if (pktlen > (BUF_SIZE - sizeof(*header))) {
 929                 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
 930                 solos_pop(vcc, skb);
 931                 return 0;
 932         }
 933
 934         if (!skb_clone_writable(skb, sizeof(*header))) {
 935                 int expand_by = 0;
 936                 int ret;
 937
 938                 if (skb_headroom(skb) < sizeof(*header))
 939                         expand_by = sizeof(*header) - skb_headroom(skb);
 940
 941                 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
 942                 if (ret) {
 943                         dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
 944                         solos_pop(vcc, skb);
 945                         return ret;
 946                 }
 947         }
 948
 949         header = (void *)skb_push(skb, sizeof(*header));
 950
 951         /* This does _not_ include the size of the header */
 952         header->size = cpu_to_le16(pktlen);
 953         header->vpi = cpu_to_le16(vcc->vpi);
 954         header->vci = cpu_to_le16(vcc->vci);
 955         header->type = cpu_to_le16(PKT_DATA);
 956
 957         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
 958
 959         return 0;
 960 }
 961
 962 static struct atmdev_ops fpga_ops = {
 963         .open =         popen,
 964         .close =        pclose,
 965         .ioctl =        NULL,
 966         .getsockopt =   NULL,
 967         .setsockopt =   NULL,
 968         .send =         psend,
 969         .send_oam =     NULL,
 970         .phy_put =      NULL,
 971         .phy_get =      NULL,
 972         .change_qos =   NULL,
 973         .proc_read =    NULL,
 974         .owner =        THIS_MODULE
 975 };
 976
 977 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
 978 {
 979         int err, i;
 980         uint16_t fpga_ver;
 981         uint8_t major_ver, minor_ver;
 982         uint32_t data32;
 983         struct solos_card *card;
 984
 985         if (debug)
 986                 return 0;
 987
 988         card = kzalloc(sizeof(*card), GFP_KERNEL);
 989         if (!card)
 990                 return -ENOMEM;
 991
 992         card->dev = dev;
 993         init_waitqueue_head(&card->fw_wq);
 994         init_waitqueue_head(&card->param_wq);
 995
 996         err = pci_enable_device(dev);
 997         if (err) {
 998                 dev_warn(&dev->dev,  "Failed to enable PCI device\n");
 999                 goto out;
1000         }
1001
1002         err = pci_request_regions(dev, "solos");
1003         if (err) {
1004                 dev_warn(&dev->dev, "Failed to request regions\n");
1005                 goto out;
1006         }
1007
1008         card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1009         if (!card->config_regs) {
1010                 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1011                 goto out_release_regions;
1012         }
1013         card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1014         if (!card->buffers) {
1015                 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1016                 goto out_unmap_config;
1017         }
1018
1019 //      for(i=0;i<64 ;i+=4){
1020 //              data32=ioread32(card->buffers + i);
1021 //              dev_dbg(&card->dev->dev, "%08lX\n",(unsigned long)data32);
1022 //      }
1023
1024         //Fill Config Mem with zeros
1025         for(i = 0; i < 128; i += 4)
1026                 iowrite32(0, card->config_regs + i);
1027
1028         //Set RX empty flags
1029         iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1030
1031         data32 = ioread32(card->config_regs + FPGA_VER);
1032         fpga_ver = (data32 & 0x0000FFFF);
1033         major_ver = ((data32 & 0xFF000000) >> 24);
1034         minor_ver = ((data32 & 0x00FF0000) >> 16);
1035         dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1036                  major_ver, minor_ver, fpga_ver);
1037
1038         card->nr_ports = 2; /* FIXME: Detect daughterboard */
1039
1040         pci_set_drvdata(dev, card);
1041
1042         tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1043         spin_lock_init(&card->tx_lock);
1044         spin_lock_init(&card->tx_queue_lock);
1045         spin_lock_init(&card->cli_queue_lock);
1046         spin_lock_init(&card->param_queue_lock);
1047         INIT_LIST_HEAD(&card->param_queue);
1048
1049 /*
1050         // Set Loopback mode
1051         data32 = 0x00010000;
1052         iowrite32(data32,card->config_regs + FLAGS_ADDR);
1053 */
1054 /*
1055         // Fill Buffers with zeros
1056         for (i = 0; i < BUF_SIZE * 8; i += 4)
1057                 iowrite32(0, card->buffers + i);
1058 */
1059 /*
1060         for(i = 0; i < (BUF_SIZE * 1); i += 4)
1061                 iowrite32(0x12345678, card->buffers + i + (0*BUF_SIZE));
1062         for(i = 0; i < (BUF_SIZE * 1); i += 4)
1063                 iowrite32(0xabcdef98, card->buffers + i + (1*BUF_SIZE));
1064
1065         // Read Config Memory
1066         printk(KERN_DEBUG "Reading Config MEM\n");
1067         i = 0;
1068         for(i = 0; i < 16; i++) {
1069                 data32=ioread32(card->buffers + i*(BUF_SIZE/2));
1070                 printk(KERN_ALERT "Addr: %lX Data: %08lX\n",
1071                        (unsigned long)(addr_start + i*(BUF_SIZE/2)),
1072                        (unsigned long)data32);
1073         }
1074 */
1075         //dev_dbg(&card->dev->dev, "Requesting IRQ: %d\n",dev->irq);
1076         err = request_irq(dev->irq, solos_irq, IRQF_DISABLED|IRQF_SHARED,
1077                           "solos-pci", card);
1078         if (err) {
1079                 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1080                 goto out_unmap_both;
1081         }
1082
1083         // Enable IRQs
1084         iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1085
1086         if (fpga_upgrade)
1087                 flash_upgrade(card, 0);
1088
1089         if (firmware_upgrade)
1090                 flash_upgrade(card, 1);
1091
1092         err = atm_init(card);
1093         if (err)
1094                 goto out_free_irq;
1095
1096         return 0;
1097
1098  out_free_irq:
1099         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1100         free_irq(dev->irq, card);
1101         tasklet_kill(&card->tlet);
1102
1103  out_unmap_both:
1104         pci_set_drvdata(dev, NULL);
1105         pci_iounmap(dev, card->config_regs);
1106  out_unmap_config:
1107         pci_iounmap(dev, card->buffers);
1108  out_release_regions:
1109         pci_release_regions(dev);
1110  out:
1111         return err;
1112 }
1113
1114 static int atm_init(struct solos_card *card)
1115 {
1116         int i;
1117
1118         for (i = 0; i < card->nr_ports; i++) {
1119                 struct sk_buff *skb;
1120                 struct pkt_hdr *header;
1121
1122                 skb_queue_head_init(&card->tx_queue[i]);
1123                 skb_queue_head_init(&card->cli_queue[i]);
1124
1125                 card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
1126                 if (!card->atmdev[i]) {
1127                         dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1128                         atm_remove(card);
1129                         return -ENODEV;
1130                 }
1131                 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1132                         dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1133                 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1134                         dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1135
1136                 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1137
1138                 card->atmdev[i]->ci_range.vpi_bits = 8;
1139                 card->atmdev[i]->ci_range.vci_bits = 16;
1140                 card->atmdev[i]->dev_data = card;
1141                 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1142                 card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
1143
1144                 skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
1145                 if (!skb) {
1146                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1147                         continue;
1148                 }
1149
1150                 header = (void *)skb_put(skb, sizeof(*header));
1151
1152                 header->size = cpu_to_le16(0);
1153                 header->vpi = cpu_to_le16(0);
1154                 header->vci = cpu_to_le16(0);
1155                 header->type = cpu_to_le16(PKT_STATUS);
1156
1157                 fpga_queue(card, i, skb, NULL);
1158         }
1159         return 0;
1160 }
1161
1162 static void atm_remove(struct solos_card *card)
1163 {
1164         int i;
1165
1166         for (i = 0; i < card->nr_ports; i++) {
1167                 if (card->atmdev[i]) {
1168                         dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1169
1170                         sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1171                         atm_dev_deregister(card->atmdev[i]);
1172                 }
1173         }
1174 }
1175
1176 static void fpga_remove(struct pci_dev *dev)
1177 {
1178         struct solos_card *card = pci_get_drvdata(dev);
1179
1180         if (debug)
1181                 return;
1182
1183         atm_remove(card);
1184
1185         dev_vdbg(&dev->dev, "Freeing IRQ\n");
1186         // Disable IRQs from FPGA
1187         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1188         free_irq(dev->irq, card);
1189         tasklet_kill(&card->tlet);
1190
1191         //      iowrite32(0x01,pciregs);
1192         dev_vdbg(&dev->dev, "Unmapping PCI resource\n");
1193         pci_iounmap(dev, card->buffers);
1194         pci_iounmap(dev, card->config_regs);
1195
1196         dev_vdbg(&dev->dev, "Releasing PCI Region\n");
1197         pci_release_regions(dev);
1198         pci_disable_device(dev);
1199
1200         pci_set_drvdata(dev, NULL);
1201         kfree(card);
1202 //      dev_dbg(&card->dev->dev, "fpga_remove\n");
1203         return;
1204 }
1205
1206 static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
1207         { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1208         { 0, }
1209 };
1210
1211 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1212
1213 static struct pci_driver fpga_driver = {
1214         .name =         "solos",
1215         .id_table =     fpga_pci_tbl,
1216         .probe =        fpga_probe,
1217         .remove =       fpga_remove,
1218 };
1219
1220
1221 static int __init solos_pci_init(void)
1222 {
1223         printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1224         return pci_register_driver(&fpga_driver);
1225 }
1226
1227 static void __exit solos_pci_exit(void)
1228 {
1229         pci_unregister_driver(&fpga_driver);
1230         printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1231 }
1232
1233 module_init(solos_pci_init);
1234 module_exit(solos_pci_exit);