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