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