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