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 #include <linux/slab.h>
  44
  45 #define VERSION "1.04"
  46 #define DRIVER_VERSION 0x01
  47 #define PTAG "solos-pci"
  48
  49 #define CONFIG_RAM_SIZE 128
  50 #define FLAGS_ADDR      0x7C
  51 #define IRQ_EN_ADDR     0x78
  52 #define FPGA_VER        0x74
  53 #define IRQ_CLEAR       0x70
  54 #define WRITE_FLASH     0x6C
  55 #define PORTS           0x68
  56 #define FLASH_BLOCK     0x64
  57 #define FLASH_BUSY      0x60
  58 #define FPGA_MODE       0x5C
  59 #define FLASH_MODE      0x58
  60 #define GPIO_STATUS     0x54
  61 #define DRIVER_VER      0x50
  62 #define TX_DMA_ADDR(port)       (0x40 + (4 * (port)))
  63 #define RX_DMA_ADDR(port)       (0x30 + (4 * (port)))
  64
  65 #define DATA_RAM_SIZE   32768
  66 #define BUF_SIZE        2048
  67 #define OLD_BUF_SIZE    4096 /* For FPGA versions <= 2*/
  68 /* Old boards use ATMEL AD45DB161D flash */
  69 #define ATMEL_FPGA_PAGE 528 /* FPGA flash page size*/
  70 #define ATMEL_SOLOS_PAGE        512 /* Solos flash page size*/
  71 #define ATMEL_FPGA_BLOCK        (ATMEL_FPGA_PAGE * 8) /* FPGA block size*/
  72 #define ATMEL_SOLOS_BLOCK       (ATMEL_SOLOS_PAGE * 8) /* Solos block size*/
  73 /* Current boards use M25P/M25PE SPI flash */
  74 #define SPI_FLASH_BLOCK (256 * 64)
  75
  76 #define RX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2)
  77 #define TX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2 + (card->buffer_size))
  78 #define FLASH_BUF ((card->buffers) + 4*(card->buffer_size)*2)
  79
  80 #define RX_DMA_SIZE     2048
  81
  82 #define FPGA_VERSION(a,b) (((a) << 8) + (b))
  83 #define LEGACY_BUFFERS  2
  84 #define DMA_SUPPORTED   4
  85
  86 static int reset = 0;
  87 static int atmdebug = 0;
  88 static int firmware_upgrade = 0;
  89 static int fpga_upgrade = 0;
  90 static int db_firmware_upgrade = 0;
  91 static int db_fpga_upgrade = 0;
  92
  93 struct pkt_hdr {
  94         __le16 size;
  95         __le16 vpi;
  96         __le16 vci;
  97         __le16 type;
  98 };
  99
 100 struct solos_skb_cb {
 101         struct atm_vcc *vcc;
 102         uint32_t dma_addr;
 103 };
 104
 105
 106 #define SKB_CB(skb)             ((struct solos_skb_cb *)skb->cb)
 107
 108 #define PKT_DATA        0
 109 #define PKT_COMMAND     1
 110 #define PKT_POPEN       3
 111 #define PKT_PCLOSE      4
 112 #define PKT_STATUS      5
 113
 114 struct solos_card {
 115         void __iomem *config_regs;
 116         void __iomem *buffers;
 117         int nr_ports;
 118         int tx_mask;
 119         struct pci_dev *dev;
 120         struct atm_dev *atmdev[4];
 121         struct tasklet_struct tlet;
 122         spinlock_t tx_lock;
 123         spinlock_t tx_queue_lock;
 124         spinlock_t cli_queue_lock;
 125         spinlock_t param_queue_lock;
 126         struct list_head param_queue;
 127         struct sk_buff_head tx_queue[4];
 128         struct sk_buff_head cli_queue[4];
 129         struct sk_buff *tx_skb[4];
 130         struct sk_buff *rx_skb[4];
 131         unsigned char *dma_bounce;
 132         wait_queue_head_t param_wq;
 133         wait_queue_head_t fw_wq;
 134         int using_dma;
 135         int dma_alignment;
 136         int fpga_version;
 137         int buffer_size;
 138         int atmel_flash;
 139 };
 140
 141
 142 struct solos_param {
 143         struct list_head list;
 144         pid_t pid;
 145         int port;
 146         struct sk_buff *response;
 147 };
 148
 149 #define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
 150
 151 MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
 152 MODULE_DESCRIPTION("Solos PCI driver");
 153 MODULE_VERSION(VERSION);
 154 MODULE_LICENSE("GPL");
 155 /*(DEBLOBBED)*/
 156 MODULE_PARM_DESC(reset, "Reset Solos chips on startup");
 157 MODULE_PARM_DESC(atmdebug, "Print ATM data");
 158 MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
 159 MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
 160 MODULE_PARM_DESC(db_firmware_upgrade, "Initiate daughter board Solos firmware upgrade");
 161 MODULE_PARM_DESC(db_fpga_upgrade, "Initiate daughter board FPGA upgrade");
 162 module_param(reset, int, 0444);
 163 module_param(atmdebug, int, 0644);
 164 module_param(firmware_upgrade, int, 0444);
 165 module_param(fpga_upgrade, int, 0444);
 166 module_param(db_firmware_upgrade, int, 0444);
 167 module_param(db_fpga_upgrade, int, 0444);
 168
 169 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
 170                        struct atm_vcc *vcc);
 171 static uint32_t fpga_tx(struct solos_card *);
 172 static irqreturn_t solos_irq(int irq, void *dev_id);
 173 static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
 174 static int atm_init(struct solos_card *, struct device *);
 175 static void atm_remove(struct solos_card *);
 176 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
 177 static void solos_bh(unsigned long);
 178 static int print_buffer(struct sk_buff *buf);
 179
 180 static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
 181 {
 182         if (vcc->pop)
 183                 vcc->pop(vcc, skb);
 184         else
 185                 dev_kfree_skb_any(skb);
 186 }
 187
 188 static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
 189                                 char *buf)
 190 {
 191         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 192         struct solos_card *card = atmdev->dev_data;
 193         struct solos_param prm;
 194         struct sk_buff *skb;
 195         struct pkt_hdr *header;
 196         int buflen;
 197
 198         buflen = strlen(attr->attr.name) + 10;
 199
 200         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
 201         if (!skb) {
 202                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
 203                 return -ENOMEM;
 204         }
 205
 206         header = skb_put(skb, sizeof(*header));
 207
 208         buflen = snprintf((void *)&header[1], buflen - 1,
 209                           "L%05d\n%s\n", current->pid, attr->attr.name);
 210         skb_put(skb, buflen);
 211
 212         header->size = cpu_to_le16(buflen);
 213         header->vpi = cpu_to_le16(0);
 214         header->vci = cpu_to_le16(0);
 215         header->type = cpu_to_le16(PKT_COMMAND);
 216
 217         prm.pid = current->pid;
 218         prm.response = NULL;
 219         prm.port = SOLOS_CHAN(atmdev);
 220
 221         spin_lock_irq(&card->param_queue_lock);
 222         list_add(&prm.list, &card->param_queue);
 223         spin_unlock_irq(&card->param_queue_lock);
 224
 225         fpga_queue(card, prm.port, skb, NULL);
 226
 227         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
 228
 229         spin_lock_irq(&card->param_queue_lock);
 230         list_del(&prm.list);
 231         spin_unlock_irq(&card->param_queue_lock);
 232
 233         if (!prm.response)
 234                 return -EIO;
 235
 236         buflen = prm.response->len;
 237         memcpy(buf, prm.response->data, buflen);
 238         kfree_skb(prm.response);
 239
 240         return buflen;
 241 }
 242
 243 static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
 244                                  const char *buf, size_t count)
 245 {
 246         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 247         struct solos_card *card = atmdev->dev_data;
 248         struct solos_param prm;
 249         struct sk_buff *skb;
 250         struct pkt_hdr *header;
 251         int buflen;
 252         ssize_t ret;
 253
 254         buflen = strlen(attr->attr.name) + 11 + count;
 255
 256         skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
 257         if (!skb) {
 258                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
 259                 return -ENOMEM;
 260         }
 261
 262         header = skb_put(skb, sizeof(*header));
 263
 264         buflen = snprintf((void *)&header[1], buflen - 1,
 265                           "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
 266
 267         skb_put(skb, buflen);
 268         header->size = cpu_to_le16(buflen);
 269         header->vpi = cpu_to_le16(0);
 270         header->vci = cpu_to_le16(0);
 271         header->type = cpu_to_le16(PKT_COMMAND);
 272
 273         prm.pid = current->pid;
 274         prm.response = NULL;
 275         prm.port = SOLOS_CHAN(atmdev);
 276
 277         spin_lock_irq(&card->param_queue_lock);
 278         list_add(&prm.list, &card->param_queue);
 279         spin_unlock_irq(&card->param_queue_lock);
 280
 281         fpga_queue(card, prm.port, skb, NULL);
 282
 283         wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
 284
 285         spin_lock_irq(&card->param_queue_lock);
 286         list_del(&prm.list);
 287         spin_unlock_irq(&card->param_queue_lock);
 288
 289         skb = prm.response;
 290
 291         if (!skb)
 292                 return -EIO;
 293
 294         buflen = skb->len;
 295
 296         /* Sometimes it has a newline, sometimes it doesn't. */
 297         if (skb->data[buflen - 1] == '\n')
 298                 buflen--;
 299
 300         if (buflen == 2 && !strncmp(skb->data, "OK", 2))
 301                 ret = count;
 302         else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
 303                 ret = -EIO;
 304         else {
 305                 /* We know we have enough space allocated for this; we allocated
 306                    it ourselves */
 307                 skb->data[buflen] = 0;
 308
 309                 dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
 310                          skb->data);
 311                 ret = -EIO;
 312         }
 313         kfree_skb(skb);
 314
 315         return ret;
 316 }
 317
 318 static char *next_string(struct sk_buff *skb)
 319 {
 320         int i = 0;
 321         char *this = skb->data;
 322
 323         for (i = 0; i < skb->len; i++) {
 324                 if (this[i] == '\n') {
 325                         this[i] = 0;
 326                         skb_pull(skb, i + 1);
 327                         return this;
 328                 }
 329                 if (!isprint(this[i]))
 330                         return NULL;
 331         }
 332         return NULL;
 333 }
 334
 335 /*
 336  * Status packet has fields separated by \n, starting with a version number
 337  * for the information therein. Fields are....
 338  *
 339  *     packet version
 340  *     RxBitRate        (version >= 1)
 341  *     TxBitRate        (version >= 1)
 342  *     State            (version >= 1)
 343  *     LocalSNRMargin   (version >= 1)
 344  *     LocalLineAttn    (version >= 1)
 345  */
 346 static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
 347 {
 348         char *str, *state_str, *snr, *attn;
 349         int ver, rate_up, rate_down, err;
 350
 351         if (!card->atmdev[port])
 352                 return -ENODEV;
 353
 354         str = next_string(skb);
 355         if (!str)
 356                 return -EIO;
 357
 358         err = kstrtoint(str, 10, &ver);
 359         if (err) {
 360                 dev_warn(&card->dev->dev, "Unexpected status interrupt version\n");
 361                 return err;
 362         }
 363         if (ver < 1) {
 364                 dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
 365                          ver);
 366                 return -EIO;
 367         }
 368
 369         str = next_string(skb);
 370         if (!str)
 371                 return -EIO;
 372         if (!strcmp(str, "ERROR")) {
 373                 dev_dbg(&card->dev->dev, "Status packet indicated Solos error on port %d (starting up?)\n",
 374                          port);
 375                 return 0;
 376         }
 377
 378         err = kstrtoint(str, 10, &rate_down);
 379         if (err)
 380                 return err;
 381
 382         str = next_string(skb);
 383         if (!str)
 384                 return -EIO;
 385         err = kstrtoint(str, 10, &rate_up);
 386         if (err)
 387                 return err;
 388
 389         state_str = next_string(skb);
 390         if (!state_str)
 391                 return -EIO;
 392
 393         /* Anything but 'Showtime' is down */
 394         if (strcmp(state_str, "Showtime")) {
 395                 atm_dev_signal_change(card->atmdev[port], ATM_PHY_SIG_LOST);
 396                 dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
 397                 return 0;
 398         }
 399
 400         snr = next_string(skb);
 401         if (!snr)
 402                 return -EIO;
 403         attn = next_string(skb);
 404         if (!attn)
 405                 return -EIO;
 406
 407         dev_info(&card->dev->dev, "Port %d: %s @%d/%d kb/s%s%s%s%s\n",
 408                  port, state_str, rate_down/1000, rate_up/1000,
 409                  snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
 410
 411         card->atmdev[port]->link_rate = rate_down / 424;
 412         atm_dev_signal_change(card->atmdev[port], ATM_PHY_SIG_FOUND);
 413
 414         return 0;
 415 }
 416
 417 static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
 418 {
 419         struct solos_param *prm;
 420         unsigned long flags;
 421         int cmdpid;
 422         int found = 0, err;
 423
 424         if (skb->len < 7)
 425                 return 0;
 426
 427         if (skb->data[0] != 'L'    || !isdigit(skb->data[1]) ||
 428             !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
 429             !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
 430             skb->data[6] != '\n')
 431                 return 0;
 432
 433         err = kstrtoint(&skb->data[1], 10, &cmdpid);
 434         if (err)
 435                 return err;
 436
 437         spin_lock_irqsave(&card->param_queue_lock, flags);
 438         list_for_each_entry(prm, &card->param_queue, list) {
 439                 if (prm->port == port && prm->pid == cmdpid) {
 440                         prm->response = skb;
 441                         skb_pull(skb, 7);
 442                         wake_up(&card->param_wq);
 443                         found = 1;
 444                         break;
 445                 }
 446         }
 447         spin_unlock_irqrestore(&card->param_queue_lock, flags);
 448         return found;
 449 }
 450
 451 static ssize_t console_show(struct device *dev, struct device_attribute *attr,
 452                             char *buf)
 453 {
 454         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 455         struct solos_card *card = atmdev->dev_data;
 456         struct sk_buff *skb;
 457         unsigned int len;
 458
 459         spin_lock(&card->cli_queue_lock);
 460         skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
 461         spin_unlock(&card->cli_queue_lock);
 462         if(skb == NULL)
 463                 return sprintf(buf, "No data.\n");
 464
 465         len = skb->len;
 466         memcpy(buf, skb->data, len);
 467
 468         kfree_skb(skb);
 469         return len;
 470 }
 471
 472 static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
 473 {
 474         struct sk_buff *skb;
 475         struct pkt_hdr *header;
 476
 477         if (size > (BUF_SIZE - sizeof(*header))) {
 478                 dev_dbg(&card->dev->dev, "Command is too big.  Dropping request\n");
 479                 return 0;
 480         }
 481         skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
 482         if (!skb) {
 483                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
 484                 return 0;
 485         }
 486
 487         header = skb_put(skb, sizeof(*header));
 488
 489         header->size = cpu_to_le16(size);
 490         header->vpi = cpu_to_le16(0);
 491         header->vci = cpu_to_le16(0);
 492         header->type = cpu_to_le16(PKT_COMMAND);
 493
 494         skb_put_data(skb, buf, size);
 495
 496         fpga_queue(card, dev, skb, NULL);
 497
 498         return 0;
 499 }
 500
 501 static ssize_t console_store(struct device *dev, struct device_attribute *attr,
 502                              const char *buf, size_t count)
 503 {
 504         struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
 505         struct solos_card *card = atmdev->dev_data;
 506         int err;
 507
 508         err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
 509
 510         return err?:count;
 511 }
 512
 513 struct geos_gpio_attr {
 514         struct device_attribute attr;
 515         int offset;
 516 };
 517
 518 #define SOLOS_GPIO_ATTR(_name, _mode, _show, _store, _offset)   \
 519         struct geos_gpio_attr gpio_attr_##_name = {             \
 520                 .attr = __ATTR(_name, _mode, _show, _store),    \
 521                 .offset = _offset }
 522
 523 static ssize_t geos_gpio_store(struct device *dev, struct device_attribute *attr,
 524                                const char *buf, size_t count)
 525 {
 526         struct pci_dev *pdev = to_pci_dev(dev);
 527         struct geos_gpio_attr *gattr = container_of(attr, struct geos_gpio_attr, attr);
 528         struct solos_card *card = pci_get_drvdata(pdev);
 529         uint32_t data32;
 530
 531         if (count != 1 && (count != 2 || buf[1] != '\n'))
 532                 return -EINVAL;
 533
 534         spin_lock_irq(&card->param_queue_lock);
 535         data32 = ioread32(card->config_regs + GPIO_STATUS);
 536         if (buf[0] == '1') {
 537                 data32 |= 1 << gattr->offset;
 538                 iowrite32(data32, card->config_regs + GPIO_STATUS);
 539         } else if (buf[0] == '0') {
 540                 data32 &= ~(1 << gattr->offset);
 541                 iowrite32(data32, card->config_regs + GPIO_STATUS);
 542         } else {
 543                 count = -EINVAL;
 544         }
 545         spin_unlock_irq(&card->param_queue_lock);
 546         return count;
 547 }
 548
 549 static ssize_t geos_gpio_show(struct device *dev, struct device_attribute *attr,
 550                               char *buf)
 551 {
 552         struct pci_dev *pdev = to_pci_dev(dev);
 553         struct geos_gpio_attr *gattr = container_of(attr, struct geos_gpio_attr, attr);
 554         struct solos_card *card = pci_get_drvdata(pdev);
 555         uint32_t data32;
 556
 557         data32 = ioread32(card->config_regs + GPIO_STATUS);
 558         data32 = (data32 >> gattr->offset) & 1;
 559
 560         return sprintf(buf, "%d\n", data32);
 561 }
 562
 563 static ssize_t hardware_show(struct device *dev, struct device_attribute *attr,
 564                              char *buf)
 565 {
 566         struct pci_dev *pdev = to_pci_dev(dev);
 567         struct geos_gpio_attr *gattr = container_of(attr, struct geos_gpio_attr, attr);
 568         struct solos_card *card = pci_get_drvdata(pdev);
 569         uint32_t data32;
 570
 571         data32 = ioread32(card->config_regs + GPIO_STATUS);
 572         switch (gattr->offset) {
 573         case 0:
 574                 /* HardwareVersion */
 575                 data32 = data32 & 0x1F;
 576                 break;
 577         case 1:
 578                 /* HardwareVariant */
 579                 data32 = (data32 >> 5) & 0x0F;
 580                 break;
 581         }
 582         return sprintf(buf, "%d\n", data32);
 583 }
 584
 585 static DEVICE_ATTR_RW(console);
 586
 587
 588 #define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
 589 #define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
 590
 591 #include "solos-attrlist.c"
 592
 593 static SOLOS_GPIO_ATTR(GPIO1, 0644, geos_gpio_show, geos_gpio_store, 9);
 594 static SOLOS_GPIO_ATTR(GPIO2, 0644, geos_gpio_show, geos_gpio_store, 10);
 595 static SOLOS_GPIO_ATTR(GPIO3, 0644, geos_gpio_show, geos_gpio_store, 11);
 596 static SOLOS_GPIO_ATTR(GPIO4, 0644, geos_gpio_show, geos_gpio_store, 12);
 597 static SOLOS_GPIO_ATTR(GPIO5, 0644, geos_gpio_show, geos_gpio_store, 13);
 598 static SOLOS_GPIO_ATTR(PushButton, 0444, geos_gpio_show, NULL, 14);
 599 static SOLOS_GPIO_ATTR(HardwareVersion, 0444, hardware_show, NULL, 0);
 600 static SOLOS_GPIO_ATTR(HardwareVariant, 0444, hardware_show, NULL, 1);
 601 #undef SOLOS_ATTR_RO
 602 #undef SOLOS_ATTR_RW
 603
 604 #define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
 605 #define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
 606
 607 static struct attribute *solos_attrs[] = {
 608 #include "solos-attrlist.c"
 609         NULL
 610 };
 611
 612 static const struct attribute_group solos_attr_group = {
 613         .attrs = solos_attrs,
 614         .name = "parameters",
 615 };
 616
 617 static struct attribute *gpio_attrs[] = {
 618         &gpio_attr_GPIO1.attr.attr,
 619         &gpio_attr_GPIO2.attr.attr,
 620         &gpio_attr_GPIO3.attr.attr,
 621         &gpio_attr_GPIO4.attr.attr,
 622         &gpio_attr_GPIO5.attr.attr,
 623         &gpio_attr_PushButton.attr.attr,
 624         &gpio_attr_HardwareVersion.attr.attr,
 625         &gpio_attr_HardwareVariant.attr.attr,
 626         NULL
 627 };
 628
 629 static const struct attribute_group gpio_attr_group = {
 630         .attrs = gpio_attrs,
 631         .name = "gpio",
 632 };
 633
 634 static int flash_upgrade(struct solos_card *card, int chip)
 635 {
 636         const struct firmware *fw;
 637         const char *fw_name;
 638         int blocksize = 0;
 639         int numblocks = 0;
 640         int offset;
 641
 642         switch (chip) {
 643         case 0:
 644                 fw_name = "/*(DEBLOBBED)*/";
 645                 if (card->atmel_flash)
 646                         blocksize = ATMEL_FPGA_BLOCK;
 647                 else
 648                         blocksize = SPI_FLASH_BLOCK;
 649                 break;
 650         case 1:
 651                 fw_name = "/*(DEBLOBBED)*/";
 652                 if (card->atmel_flash)
 653                         blocksize = ATMEL_SOLOS_BLOCK;
 654                 else
 655                         blocksize = SPI_FLASH_BLOCK;
 656                 break;
 657         case 2:
 658                 if (card->fpga_version > LEGACY_BUFFERS){
 659                         fw_name = "/*(DEBLOBBED)*/";
 660                         if (card->atmel_flash)
 661                                 blocksize = ATMEL_FPGA_BLOCK;
 662                         else
 663                                 blocksize = SPI_FLASH_BLOCK;
 664                 } else {
 665                         dev_info(&card->dev->dev, "FPGA version doesn't support"
 666                                         " daughter board upgrades\n");
 667                         return -EPERM;
 668                 }
 669                 break;
 670         case 3:
 671                 if (card->fpga_version > LEGACY_BUFFERS){
 672                         fw_name = "/*(DEBLOBBED)*/";
 673                         if (card->atmel_flash)
 674                                 blocksize = ATMEL_SOLOS_BLOCK;
 675                         else
 676                                 blocksize = SPI_FLASH_BLOCK;
 677                 } else {
 678                         dev_info(&card->dev->dev, "FPGA version doesn't support"
 679                                         " daughter board upgrades\n");
 680                         return -EPERM;
 681                 }
 682                 break;
 683         default:
 684                 return -ENODEV;
 685         }
 686
 687         if (reject_firmware(&fw, fw_name, &card->dev->dev))
 688                 return -ENOENT;
 689
 690         dev_info(&card->dev->dev, "Flash upgrade starting\n");
 691
 692         /* New FPGAs require driver version before permitting flash upgrades */
 693         iowrite32(DRIVER_VERSION, card->config_regs + DRIVER_VER);
 694
 695         numblocks = fw->size / blocksize;
 696         dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
 697         dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
 698
 699         dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
 700         iowrite32(1, card->config_regs + FPGA_MODE);
 701         (void) ioread32(card->config_regs + FPGA_MODE);
 702
 703         /* Set mode to Chip Erase */
 704         if(chip == 0 || chip == 2)
 705                 dev_info(&card->dev->dev, "Set FPGA Flash mode to FPGA Chip Erase\n");
 706         if(chip == 1 || chip == 3)
 707                 dev_info(&card->dev->dev, "Set FPGA Flash mode to Solos Chip Erase\n");
 708         iowrite32((chip * 2), card->config_regs + FLASH_MODE);
 709
 710
 711         iowrite32(1, card->config_regs + WRITE_FLASH);
 712         wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
 713
 714         for (offset = 0; offset < fw->size; offset += blocksize) {
 715                 int i;
 716
 717                 /* Clear write flag */
 718                 iowrite32(0, card->config_regs + WRITE_FLASH);
 719
 720                 /* Set mode to Block Write */
 721                 /* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
 722                 iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
 723
 724                 /* Copy block to buffer, swapping each 16 bits for Atmel flash */
 725                 for(i = 0; i < blocksize; i += 4) {
 726                         uint32_t word;
 727                         if (card->atmel_flash)
 728                                 word = swahb32p((uint32_t *)(fw->data + offset + i));
 729                         else
 730                                 word = *(uint32_t *)(fw->data + offset + i);
 731                         if(card->fpga_version > LEGACY_BUFFERS)
 732                                 iowrite32(word, FLASH_BUF + i);
 733                         else
 734                                 iowrite32(word, RX_BUF(card, 3) + i);
 735                 }
 736
 737                 /* Specify block number and then trigger flash write */
 738                 iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
 739                 iowrite32(1, card->config_regs + WRITE_FLASH);
 740                 wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
 741         }
 742
 743         release_firmware(fw);
 744         iowrite32(0, card->config_regs + WRITE_FLASH);
 745         iowrite32(0, card->config_regs + FPGA_MODE);
 746         iowrite32(0, card->config_regs + FLASH_MODE);
 747         dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
 748         return 0;
 749 }
 750
 751 static irqreturn_t solos_irq(int irq, void *dev_id)
 752 {
 753         struct solos_card *card = dev_id;
 754         int handled = 1;
 755
 756         iowrite32(0, card->config_regs + IRQ_CLEAR);
 757
 758         /* If we're up and running, just kick the tasklet to process TX/RX */
 759         if (card->atmdev[0])
 760                 tasklet_schedule(&card->tlet);
 761         else
 762                 wake_up(&card->fw_wq);
 763
 764         return IRQ_RETVAL(handled);
 765 }
 766
 767 static void solos_bh(unsigned long card_arg)
 768 {
 769         struct solos_card *card = (void *)card_arg;
 770         uint32_t card_flags;
 771         uint32_t rx_done = 0;
 772         int port;
 773
 774         /*
 775          * Since fpga_tx() is going to need to read the flags under its lock,
 776          * it can return them to us so that we don't have to hit PCI MMIO
 777          * again for the same information
 778          */
 779         card_flags = fpga_tx(card);
 780
 781         for (port = 0; port < card->nr_ports; port++) {
 782                 if (card_flags & (0x10 << port)) {
 783                         struct pkt_hdr _hdr, *header;
 784                         struct sk_buff *skb;
 785                         struct atm_vcc *vcc;
 786                         int size;
 787
 788                         if (card->using_dma) {
 789                                 skb = card->rx_skb[port];
 790                                 card->rx_skb[port] = NULL;
 791
 792                                 dma_unmap_single(&card->dev->dev, SKB_CB(skb)->dma_addr,
 793                                                  RX_DMA_SIZE, DMA_FROM_DEVICE);
 794
 795                                 header = (void *)skb->data;
 796                                 size = le16_to_cpu(header->size);
 797                                 skb_put(skb, size + sizeof(*header));
 798                                 skb_pull(skb, sizeof(*header));
 799                         } else {
 800                                 header = &_hdr;
 801
 802                                 rx_done |= 0x10 << port;
 803
 804                                 memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
 805
 806                                 size = le16_to_cpu(header->size);
 807                                 if (size > (card->buffer_size - sizeof(*header))){
 808                                         dev_warn(&card->dev->dev, "Invalid buffer size\n");
 809                                         continue;
 810                                 }
 811
 812                                 /* Use netdev_alloc_skb() because it adds NET_SKB_PAD of
 813                                  * headroom, and ensures we can route packets back out an
 814                                  * Ethernet interface (for example) without having to
 815                                  * reallocate. Adding NET_IP_ALIGN also ensures that both
 816                                  * PPPoATM and PPPoEoBR2684 packets end up aligned. */
 817                                 skb = netdev_alloc_skb_ip_align(NULL, size + 1);
 818                                 if (!skb) {
 819                                         if (net_ratelimit())
 820                                                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
 821                                         continue;
 822                                 }
 823
 824                                 memcpy_fromio(skb_put(skb, size),
 825                                               RX_BUF(card, port) + sizeof(*header),
 826                                               size);
 827                         }
 828                         if (atmdebug) {
 829                                 dev_info(&card->dev->dev, "Received: port %d\n", port);
 830                                 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
 831                                          size, le16_to_cpu(header->vpi),
 832                                          le16_to_cpu(header->vci));
 833                                 print_buffer(skb);
 834                         }
 835
 836                         switch (le16_to_cpu(header->type)) {
 837                         case PKT_DATA:
 838                                 vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
 839                                                le16_to_cpu(header->vci));
 840                                 if (!vcc) {
 841                                         if (net_ratelimit())
 842                                                 dev_warn(&card->dev->dev, "Received packet for unknown VPI.VCI %d.%d on port %d\n",
 843                                                          le16_to_cpu(header->vpi), le16_to_cpu(header->vci),
 844                                                          port);
 845                                         dev_kfree_skb_any(skb);
 846                                         break;
 847                                 }
 848                                 atm_charge(vcc, skb->truesize);
 849                                 vcc->push(vcc, skb);
 850                                 atomic_inc(&vcc->stats->rx);
 851                                 break;
 852
 853                         case PKT_STATUS:
 854                                 if (process_status(card, port, skb) &&
 855                                     net_ratelimit()) {
 856                                         dev_warn(&card->dev->dev, "Bad status packet of %d bytes on port %d:\n", skb->len, port);
 857                                         print_buffer(skb);
 858                                 }
 859                                 dev_kfree_skb_any(skb);
 860                                 break;
 861
 862                         case PKT_COMMAND:
 863                         default: /* FIXME: Not really, surely? */
 864                                 if (process_command(card, port, skb))
 865                                         break;
 866                                 spin_lock(&card->cli_queue_lock);
 867                                 if (skb_queue_len(&card->cli_queue[port]) > 10) {
 868                                         if (net_ratelimit())
 869                                                 dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
 870                                                          port);
 871                                         dev_kfree_skb_any(skb);
 872                                 } else
 873                                         skb_queue_tail(&card->cli_queue[port], skb);
 874                                 spin_unlock(&card->cli_queue_lock);
 875                                 break;
 876                         }
 877                 }
 878                 /* Allocate RX skbs for any ports which need them */
 879                 if (card->using_dma && card->atmdev[port] &&
 880                     !card->rx_skb[port]) {
 881                         /* Unlike the MMIO case (qv) we can't add NET_IP_ALIGN
 882                          * here; the FPGA can only DMA to addresses which are
 883                          * aligned to 4 bytes. */
 884                         struct sk_buff *skb = dev_alloc_skb(RX_DMA_SIZE);
 885                         if (skb) {
 886                                 SKB_CB(skb)->dma_addr =
 887                                         dma_map_single(&card->dev->dev, skb->data,
 888                                                        RX_DMA_SIZE, DMA_FROM_DEVICE);
 889                                 iowrite32(SKB_CB(skb)->dma_addr,
 890                                           card->config_regs + RX_DMA_ADDR(port));
 891                                 card->rx_skb[port] = skb;
 892                         } else {
 893                                 if (net_ratelimit())
 894                                         dev_warn(&card->dev->dev, "Failed to allocate RX skb");
 895
 896                                 /* We'll have to try again later */
 897                                 tasklet_schedule(&card->tlet);
 898                         }
 899                 }
 900         }
 901         if (rx_done)
 902                 iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
 903
 904         return;
 905 }
 906
 907 static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
 908 {
 909         struct hlist_head *head;
 910         struct atm_vcc *vcc = NULL;
 911         struct sock *s;
 912
 913         read_lock(&vcc_sklist_lock);
 914         head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
 915         sk_for_each(s, head) {
 916                 vcc = atm_sk(s);
 917                 if (vcc->dev == dev && vcc->vci == vci &&
 918                     vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE &&
 919                     test_bit(ATM_VF_READY, &vcc->flags))
 920                         goto out;
 921         }
 922         vcc = NULL;
 923  out:
 924         read_unlock(&vcc_sklist_lock);
 925         return vcc;
 926 }
 927
 928 static int popen(struct atm_vcc *vcc)
 929 {
 930         struct solos_card *card = vcc->dev->dev_data;
 931         struct sk_buff *skb;
 932         struct pkt_hdr *header;
 933
 934         if (vcc->qos.aal != ATM_AAL5) {
 935                 dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
 936                          vcc->qos.aal);
 937                 return -EINVAL;
 938         }
 939
 940         skb = alloc_skb(sizeof(*header), GFP_KERNEL);
 941         if (!skb) {
 942                 if (net_ratelimit())
 943                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
 944                 return -ENOMEM;
 945         }
 946         header = skb_put(skb, sizeof(*header));
 947
 948         header->size = cpu_to_le16(0);
 949         header->vpi = cpu_to_le16(vcc->vpi);
 950         header->vci = cpu_to_le16(vcc->vci);
 951         header->type = cpu_to_le16(PKT_POPEN);
 952
 953         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
 954
 955         set_bit(ATM_VF_ADDR, &vcc->flags);
 956         set_bit(ATM_VF_READY, &vcc->flags);
 957
 958         return 0;
 959 }
 960
 961 static void pclose(struct atm_vcc *vcc)
 962 {
 963         struct solos_card *card = vcc->dev->dev_data;
 964         unsigned char port = SOLOS_CHAN(vcc->dev);
 965         struct sk_buff *skb, *tmpskb;
 966         struct pkt_hdr *header;
 967
 968         /* Remove any yet-to-be-transmitted packets from the pending queue */
 969         spin_lock(&card->tx_queue_lock);
 970         skb_queue_walk_safe(&card->tx_queue[port], skb, tmpskb) {
 971                 if (SKB_CB(skb)->vcc == vcc) {
 972                         skb_unlink(skb, &card->tx_queue[port]);
 973                         solos_pop(vcc, skb);
 974                 }
 975         }
 976         spin_unlock(&card->tx_queue_lock);
 977
 978         skb = alloc_skb(sizeof(*header), GFP_KERNEL);
 979         if (!skb) {
 980                 dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
 981                 return;
 982         }
 983         header = skb_put(skb, sizeof(*header));
 984
 985         header->size = cpu_to_le16(0);
 986         header->vpi = cpu_to_le16(vcc->vpi);
 987         header->vci = cpu_to_le16(vcc->vci);
 988         header->type = cpu_to_le16(PKT_PCLOSE);
 989
 990         skb_get(skb);
 991         fpga_queue(card, port, skb, NULL);
 992
 993         if (!wait_event_timeout(card->param_wq, !skb_shared(skb), 5 * HZ))
 994                 dev_warn(&card->dev->dev,
 995                          "Timeout waiting for VCC close on port %d\n", port);
 996
 997         dev_kfree_skb(skb);
 998
 999         /* Hold up vcc_destroy_socket() (our caller) until solos_bh() in the
1000            tasklet has finished processing any incoming packets (and, more to
1001            the point, using the vcc pointer). */
1002         tasklet_unlock_wait(&card->tlet);
1003
1004         clear_bit(ATM_VF_ADDR, &vcc->flags);
1005
1006         return;
1007 }
1008
1009 static int print_buffer(struct sk_buff *buf)
1010 {
1011         int len,i;
1012         char msg[500];
1013         char item[10];
1014
1015         len = buf->len;
1016         for (i = 0; i < len; i++){
1017                 if(i % 8 == 0)
1018                         sprintf(msg, "%02X: ", i);
1019
1020                 sprintf(item,"%02X ",*(buf->data + i));
1021                 strcat(msg, item);
1022                 if(i % 8 == 7) {
1023                         sprintf(item, "\n");
1024                         strcat(msg, item);
1025                         printk(KERN_DEBUG "%s", msg);
1026                 }
1027         }
1028         if (i % 8 != 0) {
1029                 sprintf(item, "\n");
1030                 strcat(msg, item);
1031                 printk(KERN_DEBUG "%s", msg);
1032         }
1033         printk(KERN_DEBUG "\n");
1034
1035         return 0;
1036 }
1037
1038 static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
1039                        struct atm_vcc *vcc)
1040 {
1041         int old_len;
1042         unsigned long flags;
1043
1044         SKB_CB(skb)->vcc = vcc;
1045
1046         spin_lock_irqsave(&card->tx_queue_lock, flags);
1047         old_len = skb_queue_len(&card->tx_queue[port]);
1048         skb_queue_tail(&card->tx_queue[port], skb);
1049         if (!old_len)
1050                 card->tx_mask |= (1 << port);
1051         spin_unlock_irqrestore(&card->tx_queue_lock, flags);
1052
1053         /* Theoretically we could just schedule the tasklet here, but
1054            that introduces latency we don't want -- it's noticeable */
1055         if (!old_len)
1056                 fpga_tx(card);
1057 }
1058
1059 static uint32_t fpga_tx(struct solos_card *card)
1060 {
1061         uint32_t tx_pending, card_flags;
1062         uint32_t tx_started = 0;
1063         struct sk_buff *skb;
1064         struct atm_vcc *vcc;
1065         unsigned char port;
1066         unsigned long flags;
1067
1068         spin_lock_irqsave(&card->tx_lock, flags);
1069
1070         card_flags = ioread32(card->config_regs + FLAGS_ADDR);
1071         /*
1072          * The queue lock is required for _writing_ to tx_mask, but we're
1073          * OK to read it here without locking. The only potential update
1074          * that we could race with is in fpga_queue() where it sets a bit
1075          * for a new port... but it's going to call this function again if
1076          * it's doing that, anyway.
1077          */
1078         tx_pending = card->tx_mask & ~card_flags;
1079
1080         for (port = 0; tx_pending; tx_pending >>= 1, port++) {
1081                 if (tx_pending & 1) {
1082                         struct sk_buff *oldskb = card->tx_skb[port];
1083                         if (oldskb) {
1084                                 dma_unmap_single(&card->dev->dev, SKB_CB(oldskb)->dma_addr,
1085                                                  oldskb->len, DMA_TO_DEVICE);
1086                                 card->tx_skb[port] = NULL;
1087                         }
1088                         spin_lock(&card->tx_queue_lock);
1089                         skb = skb_dequeue(&card->tx_queue[port]);
1090                         if (!skb)
1091                                 card->tx_mask &= ~(1 << port);
1092                         spin_unlock(&card->tx_queue_lock);
1093
1094                         if (skb && !card->using_dma) {
1095                                 memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
1096                                 tx_started |= 1 << port;
1097                                 oldskb = skb; /* We're done with this skb already */
1098                         } else if (skb && card->using_dma) {
1099                                 unsigned char *data = skb->data;
1100                                 if ((unsigned long)data & card->dma_alignment) {
1101                                         data = card->dma_bounce + (BUF_SIZE * port);
1102                                         memcpy(data, skb->data, skb->len);
1103                                 }
1104                                 SKB_CB(skb)->dma_addr = dma_map_single(&card->dev->dev, data,
1105                                                                        skb->len, DMA_TO_DEVICE);
1106                                 card->tx_skb[port] = skb;
1107                                 iowrite32(SKB_CB(skb)->dma_addr,
1108                                           card->config_regs + TX_DMA_ADDR(port));
1109                         }
1110
1111                         if (!oldskb)
1112                                 continue;
1113
1114                         /* Clean up and free oldskb now it's gone */
1115                         if (atmdebug) {
1116                                 struct pkt_hdr *header = (void *)oldskb->data;
1117                                 int size = le16_to_cpu(header->size);
1118
1119                                 skb_pull(oldskb, sizeof(*header));
1120                                 dev_info(&card->dev->dev, "Transmitted: port %d\n",
1121                                          port);
1122                                 dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
1123                                          size, le16_to_cpu(header->vpi),
1124                                          le16_to_cpu(header->vci));
1125                                 print_buffer(oldskb);
1126                         }
1127
1128                         vcc = SKB_CB(oldskb)->vcc;
1129
1130                         if (vcc) {
1131                                 atomic_inc(&vcc->stats->tx);
1132                                 solos_pop(vcc, oldskb);
1133                         } else {
1134                                 dev_kfree_skb_irq(oldskb);
1135                                 wake_up(&card->param_wq);
1136                         }
1137                 }
1138         }
1139         /* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
1140         if (tx_started)
1141                 iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
1142
1143         spin_unlock_irqrestore(&card->tx_lock, flags);
1144         return card_flags;
1145 }
1146
1147 static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
1148 {
1149         struct solos_card *card = vcc->dev->dev_data;
1150         struct pkt_hdr *header;
1151         int pktlen;
1152
1153         pktlen = skb->len;
1154         if (pktlen > (BUF_SIZE - sizeof(*header))) {
1155                 dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
1156                 solos_pop(vcc, skb);
1157                 return 0;
1158         }
1159
1160         if (!skb_clone_writable(skb, sizeof(*header))) {
1161                 int expand_by = 0;
1162                 int ret;
1163
1164                 if (skb_headroom(skb) < sizeof(*header))
1165                         expand_by = sizeof(*header) - skb_headroom(skb);
1166
1167                 ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
1168                 if (ret) {
1169                         dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
1170                         solos_pop(vcc, skb);
1171                         return ret;
1172                 }
1173         }
1174
1175         header = skb_push(skb, sizeof(*header));
1176
1177         /* This does _not_ include the size of the header */
1178         header->size = cpu_to_le16(pktlen);
1179         header->vpi = cpu_to_le16(vcc->vpi);
1180         header->vci = cpu_to_le16(vcc->vci);
1181         header->type = cpu_to_le16(PKT_DATA);
1182
1183         fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
1184
1185         return 0;
1186 }
1187
1188 static const struct atmdev_ops fpga_ops = {
1189         .open =         popen,
1190         .close =        pclose,
1191         .ioctl =        NULL,
1192         .getsockopt =   NULL,
1193         .setsockopt =   NULL,
1194         .send =         psend,
1195         .send_oam =     NULL,
1196         .phy_put =      NULL,
1197         .phy_get =      NULL,
1198         .change_qos =   NULL,
1199         .proc_read =    NULL,
1200         .owner =        THIS_MODULE
1201 };
1202
1203 static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
1204 {
1205         int err;
1206         uint16_t fpga_ver;
1207         uint8_t major_ver, minor_ver;
1208         uint32_t data32;
1209         struct solos_card *card;
1210
1211         card = kzalloc(sizeof(*card), GFP_KERNEL);
1212         if (!card)
1213                 return -ENOMEM;
1214
1215         card->dev = dev;
1216         init_waitqueue_head(&card->fw_wq);
1217         init_waitqueue_head(&card->param_wq);
1218
1219         err = pci_enable_device(dev);
1220         if (err) {
1221                 dev_warn(&dev->dev,  "Failed to enable PCI device\n");
1222                 goto out;
1223         }
1224
1225         err = dma_set_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
1226         if (err) {
1227                 dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
1228                 goto out;
1229         }
1230
1231         err = pci_request_regions(dev, "solos");
1232         if (err) {
1233                 dev_warn(&dev->dev, "Failed to request regions\n");
1234                 goto out;
1235         }
1236
1237         card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
1238         if (!card->config_regs) {
1239                 dev_warn(&dev->dev, "Failed to ioremap config registers\n");
1240                 err = -ENOMEM;
1241                 goto out_release_regions;
1242         }
1243         card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
1244         if (!card->buffers) {
1245                 dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
1246                 err = -ENOMEM;
1247                 goto out_unmap_config;
1248         }
1249
1250         if (reset) {
1251                 iowrite32(1, card->config_regs + FPGA_MODE);
1252                 ioread32(card->config_regs + FPGA_MODE);
1253
1254                 iowrite32(0, card->config_regs + FPGA_MODE);
1255                 ioread32(card->config_regs + FPGA_MODE);
1256         }
1257
1258         data32 = ioread32(card->config_regs + FPGA_VER);
1259         fpga_ver = (data32 & 0x0000FFFF);
1260         major_ver = ((data32 & 0xFF000000) >> 24);
1261         minor_ver = ((data32 & 0x00FF0000) >> 16);
1262         card->fpga_version = FPGA_VERSION(major_ver,minor_ver);
1263         if (card->fpga_version > LEGACY_BUFFERS)
1264                 card->buffer_size = BUF_SIZE;
1265         else
1266                 card->buffer_size = OLD_BUF_SIZE;
1267         dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
1268                  major_ver, minor_ver, fpga_ver);
1269
1270         if (fpga_ver < 37 && (fpga_upgrade || firmware_upgrade ||
1271                               db_fpga_upgrade || db_firmware_upgrade)) {
1272                 dev_warn(&dev->dev,
1273                          "FPGA too old; cannot upgrade flash. Use JTAG.\n");
1274                 fpga_upgrade = firmware_upgrade = 0;
1275                 db_fpga_upgrade = db_firmware_upgrade = 0;
1276         }
1277
1278         /* Stopped using Atmel flash after 0.03-38 */
1279         if (fpga_ver < 39)
1280                 card->atmel_flash = 1;
1281         else
1282                 card->atmel_flash = 0;
1283
1284         data32 = ioread32(card->config_regs + PORTS);
1285         card->nr_ports = (data32 & 0x000000FF);
1286
1287         if (card->fpga_version >= DMA_SUPPORTED) {
1288                 pci_set_master(dev);
1289                 card->using_dma = 1;
1290                 if (1) { /* All known FPGA versions so far */
1291                         card->dma_alignment = 3;
1292                         card->dma_bounce = kmalloc(card->nr_ports * BUF_SIZE, GFP_KERNEL);
1293                         if (!card->dma_bounce) {
1294                                 dev_warn(&card->dev->dev, "Failed to allocate DMA bounce buffers\n");
1295                                 err = -ENOMEM;
1296                                 /* Fallback to MMIO doesn't work */
1297                                 goto out_unmap_both;
1298                         }
1299                 }
1300         } else {
1301                 card->using_dma = 0;
1302                 /* Set RX empty flag for all ports */
1303                 iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
1304         }
1305
1306         pci_set_drvdata(dev, card);
1307
1308         tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
1309         spin_lock_init(&card->tx_lock);
1310         spin_lock_init(&card->tx_queue_lock);
1311         spin_lock_init(&card->cli_queue_lock);
1312         spin_lock_init(&card->param_queue_lock);
1313         INIT_LIST_HEAD(&card->param_queue);
1314
1315         err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
1316                           "solos-pci", card);
1317         if (err) {
1318                 dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
1319                 goto out_unmap_both;
1320         }
1321
1322         iowrite32(1, card->config_regs + IRQ_EN_ADDR);
1323
1324         if (fpga_upgrade)
1325                 flash_upgrade(card, 0);
1326
1327         if (firmware_upgrade)
1328                 flash_upgrade(card, 1);
1329
1330         if (db_fpga_upgrade)
1331                 flash_upgrade(card, 2);
1332
1333         if (db_firmware_upgrade)
1334                 flash_upgrade(card, 3);
1335
1336         err = atm_init(card, &dev->dev);
1337         if (err)
1338                 goto out_free_irq;
1339
1340         if (card->fpga_version >= DMA_SUPPORTED &&
1341             sysfs_create_group(&card->dev->dev.kobj, &gpio_attr_group))
1342                 dev_err(&card->dev->dev, "Could not register parameter group for GPIOs\n");
1343
1344         return 0;
1345
1346  out_free_irq:
1347         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1348         free_irq(dev->irq, card);
1349         tasklet_kill(&card->tlet);
1350
1351  out_unmap_both:
1352         kfree(card->dma_bounce);
1353         pci_iounmap(dev, card->buffers);
1354  out_unmap_config:
1355         pci_iounmap(dev, card->config_regs);
1356  out_release_regions:
1357         pci_release_regions(dev);
1358  out:
1359         kfree(card);
1360         return err;
1361 }
1362
1363 static int atm_init(struct solos_card *card, struct device *parent)
1364 {
1365         int i;
1366
1367         for (i = 0; i < card->nr_ports; i++) {
1368                 struct sk_buff *skb;
1369                 struct pkt_hdr *header;
1370
1371                 skb_queue_head_init(&card->tx_queue[i]);
1372                 skb_queue_head_init(&card->cli_queue[i]);
1373
1374                 card->atmdev[i] = atm_dev_register("solos-pci", parent, &fpga_ops, -1, NULL);
1375                 if (!card->atmdev[i]) {
1376                         dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
1377                         atm_remove(card);
1378                         return -ENODEV;
1379                 }
1380                 if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
1381                         dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
1382                 if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
1383                         dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
1384
1385                 dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
1386
1387                 card->atmdev[i]->ci_range.vpi_bits = 8;
1388                 card->atmdev[i]->ci_range.vci_bits = 16;
1389                 card->atmdev[i]->dev_data = card;
1390                 card->atmdev[i]->phy_data = (void *)(unsigned long)i;
1391                 atm_dev_signal_change(card->atmdev[i], ATM_PHY_SIG_FOUND);
1392
1393                 skb = alloc_skb(sizeof(*header), GFP_KERNEL);
1394                 if (!skb) {
1395                         dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
1396                         continue;
1397                 }
1398
1399                 header = skb_put(skb, sizeof(*header));
1400
1401                 header->size = cpu_to_le16(0);
1402                 header->vpi = cpu_to_le16(0);
1403                 header->vci = cpu_to_le16(0);
1404                 header->type = cpu_to_le16(PKT_STATUS);
1405
1406                 fpga_queue(card, i, skb, NULL);
1407         }
1408         return 0;
1409 }
1410
1411 static void atm_remove(struct solos_card *card)
1412 {
1413         int i;
1414
1415         for (i = 0; i < card->nr_ports; i++) {
1416                 if (card->atmdev[i]) {
1417                         struct sk_buff *skb;
1418
1419                         dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
1420
1421                         sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
1422                         atm_dev_deregister(card->atmdev[i]);
1423
1424                         skb = card->rx_skb[i];
1425                         if (skb) {
1426                                 dma_unmap_single(&card->dev->dev, SKB_CB(skb)->dma_addr,
1427                                                  RX_DMA_SIZE, DMA_FROM_DEVICE);
1428                                 dev_kfree_skb(skb);
1429                         }
1430                         skb = card->tx_skb[i];
1431                         if (skb) {
1432                                 dma_unmap_single(&card->dev->dev, SKB_CB(skb)->dma_addr,
1433                                                  skb->len, DMA_TO_DEVICE);
1434                                 dev_kfree_skb(skb);
1435                         }
1436                         while ((skb = skb_dequeue(&card->tx_queue[i])))
1437                                 dev_kfree_skb(skb);
1438
1439                 }
1440         }
1441 }
1442
1443 static void fpga_remove(struct pci_dev *dev)
1444 {
1445         struct solos_card *card = pci_get_drvdata(dev);
1446
1447         /* Disable IRQs */
1448         iowrite32(0, card->config_regs + IRQ_EN_ADDR);
1449
1450         /* Reset FPGA */
1451         iowrite32(1, card->config_regs + FPGA_MODE);
1452         (void)ioread32(card->config_regs + FPGA_MODE);
1453
1454         if (card->fpga_version >= DMA_SUPPORTED)
1455                 sysfs_remove_group(&card->dev->dev.kobj, &gpio_attr_group);
1456
1457         atm_remove(card);
1458
1459         free_irq(dev->irq, card);
1460         tasklet_kill(&card->tlet);
1461
1462         kfree(card->dma_bounce);
1463
1464         /* Release device from reset */
1465         iowrite32(0, card->config_regs + FPGA_MODE);
1466         (void)ioread32(card->config_regs + FPGA_MODE);
1467
1468         pci_iounmap(dev, card->buffers);
1469         pci_iounmap(dev, card->config_regs);
1470
1471         pci_release_regions(dev);
1472         pci_disable_device(dev);
1473
1474         kfree(card);
1475 }
1476
1477 static const struct pci_device_id fpga_pci_tbl[] = {
1478         { 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
1479         { 0, }
1480 };
1481
1482 MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
1483
1484 static struct pci_driver fpga_driver = {
1485         .name =         "solos",
1486         .id_table =     fpga_pci_tbl,
1487         .probe =        fpga_probe,
1488         .remove =       fpga_remove,
1489 };
1490
1491
1492 static int __init solos_pci_init(void)
1493 {
1494         BUILD_BUG_ON(sizeof(struct solos_skb_cb) > sizeof(((struct sk_buff *)0)->cb));
1495
1496         printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
1497         return pci_register_driver(&fpga_driver);
1498 }
1499
1500 static void __exit solos_pci_exit(void)
1501 {
1502         pci_unregister_driver(&fpga_driver);
1503         printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
1504 }
1505
1506 module_init(solos_pci_init);
1507 module_exit(solos_pci_exit);