drivers/char/pcmcia/ipwireless/hardware.c

   1 /*
   2  * IPWireless 3G PCMCIA Network Driver
   3  *
   4  * Original code
   5  *   by Stephen Blackheath <stephen@blacksapphire.com>,
   6  *      Ben Martel <benm@symmetric.co.nz>
   7  *
   8  * Copyrighted as follows:
   9  *   Copyright (C) 2004 by Symmetric Systems Ltd (NZ)
  10  *
  11  * Various driver changes and rewrites, port to new kernels
  12  *   Copyright (C) 2006-2007 Jiri Kosina
  13  *
  14  * Misc code cleanups and updates
  15  *   Copyright (C) 2007 David Sterba
  16  */
  17
  18 #include <linux/interrupt.h>
  19 #include <linux/io.h>
  20 #include <linux/irq.h>
  21 #include <linux/kernel.h>
  22 #include <linux/list.h>
  23 #include <linux/slab.h>
  24
  25 #include "hardware.h"
  26 #include "setup_protocol.h"
  27 #include "network.h"
  28 #include "main.h"
  29
  30 static void ipw_send_setup_packet(struct ipw_hardware *hw);
  31 static void handle_received_SETUP_packet(struct ipw_hardware *ipw,
  32                                          unsigned int address,
  33                                          unsigned char *data, int len,
  34                                          int is_last);
  35 static void ipwireless_setup_timer(unsigned long data);
  36 static void handle_received_CTRL_packet(struct ipw_hardware *hw,
  37                 unsigned int channel_idx, unsigned char *data, int len);
  38
  39 /*#define TIMING_DIAGNOSTICS*/
  40
  41 #ifdef TIMING_DIAGNOSTICS
  42
  43 static struct timing_stats {
  44         unsigned long last_report_time;
  45         unsigned long read_time;
  46         unsigned long write_time;
  47         unsigned long read_bytes;
  48         unsigned long write_bytes;
  49         unsigned long start_time;
  50 };
  51
  52 static void start_timing(void)
  53 {
  54         timing_stats.start_time = jiffies;
  55 }
  56
  57 static void end_read_timing(unsigned length)
  58 {
  59         timing_stats.read_time += (jiffies - start_time);
  60         timing_stats.read_bytes += length + 2;
  61         report_timing();
  62 }
  63
  64 static void end_write_timing(unsigned length)
  65 {
  66         timing_stats.write_time += (jiffies - start_time);
  67         timing_stats.write_bytes += length + 2;
  68         report_timing();
  69 }
  70
  71 static void report_timing(void)
  72 {
  73         unsigned long since = jiffies - timing_stats.last_report_time;
  74
  75         /* If it's been more than one second... */
  76         if (since >= HZ) {
  77                 int first = (timing_stats.last_report_time == 0);
  78
  79                 timing_stats.last_report_time = jiffies;
  80                 if (!first)
  81                         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
  82                                ": %u us elapsed - read %lu bytes in %u us, "
  83                                "wrote %lu bytes in %u us\n",
  84                                jiffies_to_usecs(since),
  85                                timing_stats.read_bytes,
  86                                jiffies_to_usecs(timing_stats.read_time),
  87                                timing_stats.write_bytes,
  88                                jiffies_to_usecs(timing_stats.write_time));
  89
  90                 timing_stats.read_time = 0;
  91                 timing_stats.write_time = 0;
  92                 timing_stats.read_bytes = 0;
  93                 timing_stats.write_bytes = 0;
  94         }
  95 }
  96 #else
  97 static void start_timing(void) { }
  98 static void end_read_timing(unsigned length) { }
  99 static void end_write_timing(unsigned length) { }
 100 #endif
 101
 102 /* Imported IPW definitions */
 103
 104 #define LL_MTU_V1 318
 105 #define LL_MTU_V2 250
 106 #define LL_MTU_MAX (LL_MTU_V1 > LL_MTU_V2 ? LL_MTU_V1 : LL_MTU_V2)
 107
 108 #define PRIO_DATA  2
 109 #define PRIO_CTRL  1
 110 #define PRIO_SETUP 0
 111
 112 /* Addresses */
 113 #define ADDR_SETUP_PROT 0
 114
 115 /* Protocol ids */
 116 enum {
 117         /* Identifier for the Com Data protocol */
 118         TL_PROTOCOLID_COM_DATA = 0,
 119
 120         /* Identifier for the Com Control protocol */
 121         TL_PROTOCOLID_COM_CTRL = 1,
 122
 123         /* Identifier for the Setup protocol */
 124         TL_PROTOCOLID_SETUP = 2
 125 };
 126
 127 /* Number of bytes in NL packet header (cannot do
 128  * sizeof(nl_packet_header) since it's a bitfield) */
 129 #define NL_FIRST_PACKET_HEADER_SIZE        3
 130
 131 /* Number of bytes in NL packet header (cannot do
 132  * sizeof(nl_packet_header) since it's a bitfield) */
 133 #define NL_FOLLOWING_PACKET_HEADER_SIZE    1
 134
 135 struct nl_first_packet_header {
 136 #if defined(__BIG_ENDIAN_BITFIELD)
 137         unsigned char packet_rank:2;
 138         unsigned char address:3;
 139         unsigned char protocol:3;
 140 #else
 141         unsigned char protocol:3;
 142         unsigned char address:3;
 143         unsigned char packet_rank:2;
 144 #endif
 145         unsigned char length_lsb;
 146         unsigned char length_msb;
 147 };
 148
 149 struct nl_packet_header {
 150 #if defined(__BIG_ENDIAN_BITFIELD)
 151         unsigned char packet_rank:2;
 152         unsigned char address:3;
 153         unsigned char protocol:3;
 154 #else
 155         unsigned char protocol:3;
 156         unsigned char address:3;
 157         unsigned char packet_rank:2;
 158 #endif
 159 };
 160
 161 /* Value of 'packet_rank' above */
 162 #define NL_INTERMEDIATE_PACKET    0x0
 163 #define NL_LAST_PACKET            0x1
 164 #define NL_FIRST_PACKET           0x2
 165
 166 union nl_packet {
 167         /* Network packet header of the first packet (a special case) */
 168         struct nl_first_packet_header hdr_first;
 169         /* Network packet header of the following packets (if any) */
 170         struct nl_packet_header hdr;
 171         /* Complete network packet (header + data) */
 172         unsigned char rawpkt[LL_MTU_MAX];
 173 } __attribute__ ((__packed__));
 174
 175 #define HW_VERSION_UNKNOWN -1
 176 #define HW_VERSION_1 1
 177 #define HW_VERSION_2 2
 178
 179 /* IPW I/O ports */
 180 #define IOIER 0x00              /* Interrupt Enable Register */
 181 #define IOIR  0x02              /* Interrupt Source/ACK register */
 182 #define IODCR 0x04              /* Data Control Register */
 183 #define IODRR 0x06              /* Data Read Register */
 184 #define IODWR 0x08              /* Data Write Register */
 185 #define IOESR 0x0A              /* Embedded Driver Status Register */
 186 #define IORXR 0x0C              /* Rx Fifo Register (Host to Embedded) */
 187 #define IOTXR 0x0E              /* Tx Fifo Register (Embedded to Host) */
 188
 189 /* I/O ports and bit definitions for version 1 of the hardware */
 190
 191 /* IER bits*/
 192 #define IER_RXENABLED   0x1
 193 #define IER_TXENABLED   0x2
 194
 195 /* ISR bits */
 196 #define IR_RXINTR       0x1
 197 #define IR_TXINTR       0x2
 198
 199 /* DCR bits */
 200 #define DCR_RXDONE      0x1
 201 #define DCR_TXDONE      0x2
 202 #define DCR_RXRESET     0x4
 203 #define DCR_TXRESET     0x8
 204
 205 /* I/O ports and bit definitions for version 2 of the hardware */
 206
 207 struct MEMCCR {
 208         unsigned short reg_config_option;       /* PCCOR: Configuration Option Register */
 209         unsigned short reg_config_and_status;   /* PCCSR: Configuration and Status Register */
 210         unsigned short reg_pin_replacement;     /* PCPRR: Pin Replacemant Register */
 211         unsigned short reg_socket_and_copy;     /* PCSCR: Socket and Copy Register */
 212         unsigned short reg_ext_status;          /* PCESR: Extendend Status Register */
 213         unsigned short reg_io_base;             /* PCIOB: I/O Base Register */
 214 };
 215
 216 struct MEMINFREG {
 217         unsigned short memreg_tx_old;   /* TX Register (R/W) */
 218         unsigned short pad1;
 219         unsigned short memreg_rx_done;  /* RXDone Register (R/W) */
 220         unsigned short pad2;
 221         unsigned short memreg_rx;       /* RX Register (R/W) */
 222         unsigned short pad3;
 223         unsigned short memreg_pc_interrupt_ack; /* PC intr Ack Register (W) */
 224         unsigned short pad4;
 225         unsigned long memreg_card_present;/* Mask for Host to check (R) for
 226                                            * CARD_PRESENT_VALUE */
 227         unsigned short memreg_tx_new;   /* TX2 (new) Register (R/W) */
 228 };
 229
 230 #define IODMADPR 0x00           /* DMA Data Port Register (R/W) */
 231
 232 #define CARD_PRESENT_VALUE (0xBEEFCAFEUL)
 233
 234 #define MEMTX_TX                       0x0001
 235 #define MEMRX_RX                       0x0001
 236 #define MEMRX_RX_DONE                  0x0001
 237 #define MEMRX_PCINTACKK                0x0001
 238 #define MEMRX_MEMSPURIOUSINT           0x0001
 239
 240 #define NL_NUM_OF_PRIORITIES       3
 241 #define NL_NUM_OF_PROTOCOLS        3
 242 #define NL_NUM_OF_ADDRESSES        NO_OF_IPW_CHANNELS
 243
 244 struct ipw_hardware {
 245         unsigned int base_port;
 246         short hw_version;
 247         unsigned short ll_mtu;
 248         spinlock_t spinlock;
 249
 250         int initializing;
 251         int init_loops;
 252         struct timer_list setup_timer;
 253
 254         /* Flag if hw is ready to send next packet */
 255         int tx_ready;
 256         /* Count of pending packets to be sent */
 257         int tx_queued;
 258         struct list_head tx_queue[NL_NUM_OF_PRIORITIES];
 259
 260         int rx_bytes_queued;
 261         struct list_head rx_queue;
 262         /* Pool of rx_packet structures that are not currently used. */
 263         struct list_head rx_pool;
 264         int rx_pool_size;
 265         /* True if reception of data is blocked while userspace processes it. */
 266         int blocking_rx;
 267         /* True if there is RX data ready on the hardware. */
 268         int rx_ready;
 269         unsigned short last_memtx_serial;
 270         /*
 271          * Newer versions of the V2 card firmware send serial numbers in the
 272          * MemTX register. 'serial_number_detected' is set true when we detect
 273          * a non-zero serial number (indicating the new firmware).  Thereafter,
 274          * the driver can safely ignore the Timer Recovery re-sends to avoid
 275          * out-of-sync problems.
 276          */
 277         int serial_number_detected;
 278         struct work_struct work_rx;
 279
 280         /* True if we are to send the set-up data to the hardware. */
 281         int to_setup;
 282
 283         /* Card has been removed */
 284         int removed;
 285         /* Saved irq value when we disable the interrupt. */
 286         int irq;
 287         /* True if this driver is shutting down. */
 288         int shutting_down;
 289         /* Modem control lines */
 290         unsigned int control_lines[NL_NUM_OF_ADDRESSES];
 291         struct ipw_rx_packet *packet_assembler[NL_NUM_OF_ADDRESSES];
 292
 293         struct tasklet_struct tasklet;
 294
 295         /* The handle for the network layer, for the sending of events to it. */
 296         struct ipw_network *network;
 297         struct MEMINFREG __iomem *memory_info_regs;
 298         struct MEMCCR __iomem *memregs_CCR;
 299         void (*reboot_callback) (void *data);
 300         void *reboot_callback_data;
 301
 302         unsigned short __iomem *memreg_tx;
 303 };
 304
 305 /*
 306  * Packet info structure for tx packets.
 307  * Note: not all the fields defined here are required for all protocols
 308  */
 309 struct ipw_tx_packet {
 310         struct list_head queue;
 311         /* channel idx + 1 */
 312         unsigned char dest_addr;
 313         /* SETUP, CTRL or DATA */
 314         unsigned char protocol;
 315         /* Length of data block, which starts at the end of this structure */
 316         unsigned short length;
 317         /* Sending state */
 318         /* Offset of where we've sent up to so far */
 319         unsigned long offset;
 320         /* Count of packet fragments, starting at 0 */
 321         int fragment_count;
 322
 323         /* Called after packet is sent and before is freed */
 324         void (*packet_callback) (void *cb_data, unsigned int packet_length);
 325         void *callback_data;
 326 };
 327
 328 /* Signals from DTE */
 329 #define COMCTRL_RTS     0
 330 #define COMCTRL_DTR     1
 331
 332 /* Signals from DCE */
 333 #define COMCTRL_CTS     2
 334 #define COMCTRL_DCD     3
 335 #define COMCTRL_DSR     4
 336 #define COMCTRL_RI      5
 337
 338 struct ipw_control_packet_body {
 339         /* DTE signal or DCE signal */
 340         unsigned char sig_no;
 341         /* 0: set signal, 1: clear signal */
 342         unsigned char value;
 343 } __attribute__ ((__packed__));
 344
 345 struct ipw_control_packet {
 346         struct ipw_tx_packet header;
 347         struct ipw_control_packet_body body;
 348 };
 349
 350 struct ipw_rx_packet {
 351         struct list_head queue;
 352         unsigned int capacity;
 353         unsigned int length;
 354         unsigned int protocol;
 355         unsigned int channel_idx;
 356 };
 357
 358 static char *data_type(const unsigned char *buf, unsigned length)
 359 {
 360         struct nl_packet_header *hdr = (struct nl_packet_header *) buf;
 361
 362         if (length == 0)
 363                 return "     ";
 364
 365         if (hdr->packet_rank & NL_FIRST_PACKET) {
 366                 switch (hdr->protocol) {
 367                 case TL_PROTOCOLID_COM_DATA:    return "DATA ";
 368                 case TL_PROTOCOLID_COM_CTRL:    return "CTRL ";
 369                 case TL_PROTOCOLID_SETUP:       return "SETUP";
 370                 default: return "???? ";
 371                 }
 372         } else
 373                 return "     ";
 374 }
 375
 376 #define DUMP_MAX_BYTES 64
 377
 378 static void dump_data_bytes(const char *type, const unsigned char *data,
 379                             unsigned length)
 380 {
 381         char prefix[56];
 382
 383         sprintf(prefix, IPWIRELESS_PCCARD_NAME ": %s %s ",
 384                         type, data_type(data, length));
 385         print_hex_dump_bytes(prefix, 0, (void *)data,
 386                         length < DUMP_MAX_BYTES ? length : DUMP_MAX_BYTES);
 387 }
 388
 389 static int do_send_fragment(struct ipw_hardware *hw, const unsigned char *data,
 390                             unsigned length)
 391 {
 392         int i;
 393         unsigned long flags;
 394
 395         start_timing();
 396
 397         if (length == 0)
 398                 return 0;
 399
 400         if (length > hw->ll_mtu)
 401                 return -1;
 402
 403         if (ipwireless_debug)
 404                 dump_data_bytes("send", data, length);
 405
 406         spin_lock_irqsave(&hw->spinlock, flags);
 407
 408         hw->tx_ready = 0;
 409
 410         if (hw->hw_version == HW_VERSION_1) {
 411                 outw((unsigned short) length, hw->base_port + IODWR);
 412
 413                 for (i = 0; i < length; i += 2) {
 414                         unsigned short d = data[i];
 415                         __le16 raw_data;
 416
 417                         if (likely(i + 1 < length))
 418                                 d |= data[i + 1] << 8;
 419                         raw_data = cpu_to_le16(d);
 420                         outw(raw_data, hw->base_port + IODWR);
 421                 }
 422
 423                 outw(DCR_TXDONE, hw->base_port + IODCR);
 424         } else if (hw->hw_version == HW_VERSION_2) {
 425                 outw((unsigned short) length, hw->base_port + IODMADPR);
 426
 427                 for (i = 0; i < length; i += 2) {
 428                         unsigned short d = data[i];
 429                         __le16 raw_data;
 430
 431                         if ((i + 1 < length))
 432                                 d |= data[i + 1] << 8;
 433                         raw_data = cpu_to_le16(d);
 434                         outw(raw_data, hw->base_port + IODMADPR);
 435                 }
 436                 while ((i & 3) != 2) {
 437                         outw((unsigned short) 0xDEAD, hw->base_port + IODMADPR);
 438                         i += 2;
 439                 }
 440                 writew(MEMRX_RX, &hw->memory_info_regs->memreg_rx);
 441         }
 442
 443         spin_unlock_irqrestore(&hw->spinlock, flags);
 444
 445         end_write_timing(length);
 446
 447         return 0;
 448 }
 449
 450 static int do_send_packet(struct ipw_hardware *hw, struct ipw_tx_packet *packet)
 451 {
 452         unsigned short fragment_data_len;
 453         unsigned short data_left = packet->length - packet->offset;
 454         unsigned short header_size;
 455         union nl_packet pkt;
 456
 457         header_size =
 458             (packet->fragment_count == 0)
 459             ? NL_FIRST_PACKET_HEADER_SIZE
 460             : NL_FOLLOWING_PACKET_HEADER_SIZE;
 461         fragment_data_len = hw->ll_mtu - header_size;
 462         if (data_left < fragment_data_len)
 463                 fragment_data_len = data_left;
 464
 465         pkt.hdr_first.protocol = packet->protocol;
 466         pkt.hdr_first.address = packet->dest_addr;
 467         pkt.hdr_first.packet_rank = 0;
 468
 469         /* First packet? */
 470         if (packet->fragment_count == 0) {
 471                 pkt.hdr_first.packet_rank |= NL_FIRST_PACKET;
 472                 pkt.hdr_first.length_lsb = (unsigned char) packet->length;
 473                 pkt.hdr_first.length_msb =
 474                         (unsigned char) (packet->length >> 8);
 475         }
 476
 477         memcpy(pkt.rawpkt + header_size,
 478                ((unsigned char *) packet) + sizeof(struct ipw_tx_packet) +
 479                packet->offset, fragment_data_len);
 480         packet->offset += fragment_data_len;
 481         packet->fragment_count++;
 482
 483         /* Last packet? (May also be first packet.) */
 484         if (packet->offset == packet->length)
 485                 pkt.hdr_first.packet_rank |= NL_LAST_PACKET;
 486         do_send_fragment(hw, pkt.rawpkt, header_size + fragment_data_len);
 487
 488         /* If this packet has unsent data, then re-queue it. */
 489         if (packet->offset < packet->length) {
 490                 /*
 491                  * Re-queue it at the head of the highest priority queue so
 492                  * it goes before all other packets
 493                  */
 494                 unsigned long flags;
 495
 496                 spin_lock_irqsave(&hw->spinlock, flags);
 497                 list_add(&packet->queue, &hw->tx_queue[0]);
 498                 hw->tx_queued++;
 499                 spin_unlock_irqrestore(&hw->spinlock, flags);
 500         } else {
 501                 if (packet->packet_callback)
 502                         packet->packet_callback(packet->callback_data,
 503                                         packet->length);
 504                 kfree(packet);
 505         }
 506
 507         return 0;
 508 }
 509
 510 static void ipw_setup_hardware(struct ipw_hardware *hw)
 511 {
 512         unsigned long flags;
 513
 514         spin_lock_irqsave(&hw->spinlock, flags);
 515         if (hw->hw_version == HW_VERSION_1) {
 516                 /* Reset RX FIFO */
 517                 outw(DCR_RXRESET, hw->base_port + IODCR);
 518                 /* SB: Reset TX FIFO */
 519                 outw(DCR_TXRESET, hw->base_port + IODCR);
 520
 521                 /* Enable TX and RX interrupts. */
 522                 outw(IER_TXENABLED | IER_RXENABLED, hw->base_port + IOIER);
 523         } else {
 524                 /*
 525                  * Set INTRACK bit (bit 0), which means we must explicitly
 526                  * acknowledge interrupts by clearing bit 2 of reg_config_and_status.
 527                  */
 528                 unsigned short csr = readw(&hw->memregs_CCR->reg_config_and_status);
 529
 530                 csr |= 1;
 531                 writew(csr, &hw->memregs_CCR->reg_config_and_status);
 532         }
 533         spin_unlock_irqrestore(&hw->spinlock, flags);
 534 }
 535
 536 /*
 537  * If 'packet' is NULL, then this function allocates a new packet, setting its
 538  * length to 0 and ensuring it has the specified minimum amount of free space.
 539  *
 540  * If 'packet' is not NULL, then this function enlarges it if it doesn't
 541  * have the specified minimum amount of free space.
 542  *
 543  */
 544 static struct ipw_rx_packet *pool_allocate(struct ipw_hardware *hw,
 545                                            struct ipw_rx_packet *packet,
 546                                            int minimum_free_space)
 547 {
 548
 549         if (!packet) {
 550                 unsigned long flags;
 551
 552                 /*
 553                  * If this is the first fragment, then we will need to fetch a
 554                  * packet to put it in.
 555                  */
 556                 spin_lock_irqsave(&hw->spinlock, flags);
 557                 /* If we have one in our pool, then pull it out. */
 558                 if (!list_empty(&hw->rx_pool)) {
 559                         packet = list_first_entry(&hw->rx_pool,
 560                                         struct ipw_rx_packet, queue);
 561                         list_del(&packet->queue);
 562                         hw->rx_pool_size--;
 563                         spin_unlock_irqrestore(&hw->spinlock, flags);
 564                 } else {
 565                         /* Otherwise allocate a new one. */
 566                         static int min_capacity = 256;
 567                         int new_capacity;
 568
 569                         spin_unlock_irqrestore(&hw->spinlock, flags);
 570                         new_capacity =
 571                             minimum_free_space > min_capacity
 572                             ? minimum_free_space
 573                             : min_capacity;
 574                         packet = kmalloc(sizeof(struct ipw_rx_packet)
 575                                         + new_capacity, GFP_ATOMIC);
 576                         if (!packet)
 577                                 return NULL;
 578                         packet->capacity = new_capacity;
 579                 }
 580                 packet->length = 0;
 581         }
 582
 583         /*
 584          * If this packet does not have sufficient capacity for the data we
 585          * want to add, then make it bigger.
 586          */
 587         if (packet->length + minimum_free_space > packet->capacity) {
 588                 struct ipw_rx_packet *old_packet = packet;
 589
 590                 packet = kmalloc(sizeof(struct ipw_rx_packet) +
 591                                 old_packet->length + minimum_free_space,
 592                                 GFP_ATOMIC);
 593                 if (!packet) {
 594                         kfree(old_packet);
 595                         return NULL;
 596                 }
 597                 memcpy(packet, old_packet,
 598                                 sizeof(struct ipw_rx_packet)
 599                                         + old_packet->length);
 600                 packet->capacity = old_packet->length + minimum_free_space;
 601                 kfree(old_packet);
 602         }
 603
 604         return packet;
 605 }
 606
 607 static void pool_free(struct ipw_hardware *hw, struct ipw_rx_packet *packet)
 608 {
 609         if (hw->rx_pool_size > 6)
 610                 kfree(packet);
 611         else {
 612                 hw->rx_pool_size++;
 613                 list_add_tail(&packet->queue, &hw->rx_pool);
 614         }
 615 }
 616
 617 static void queue_received_packet(struct ipw_hardware *hw,
 618                                   unsigned int protocol, unsigned int address,
 619                                   unsigned char *data, int length, int is_last)
 620 {
 621         unsigned int channel_idx = address - 1;
 622         struct ipw_rx_packet *packet = NULL;
 623         unsigned long flags;
 624
 625         /* Discard packet if channel index is out of range. */
 626         if (channel_idx >= NL_NUM_OF_ADDRESSES) {
 627                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 628                        ": data packet has bad address %u\n", address);
 629                 return;
 630         }
 631
 632         /*
 633          * ->packet_assembler is safe to touch unlocked, this is the only place
 634          */
 635         if (protocol == TL_PROTOCOLID_COM_DATA) {
 636                 struct ipw_rx_packet **assem =
 637                         &hw->packet_assembler[channel_idx];
 638
 639                 /*
 640                  * Create a new packet, or assembler already contains one
 641                  * enlarge it by 'length' bytes.
 642                  */
 643                 (*assem) = pool_allocate(hw, *assem, length);
 644                 if (!(*assem)) {
 645                         printk(KERN_ERR IPWIRELESS_PCCARD_NAME
 646                                 ": no memory for incomming data packet, dropped!\n");
 647                         return;
 648                 }
 649                 (*assem)->protocol = protocol;
 650                 (*assem)->channel_idx = channel_idx;
 651
 652                 /* Append this packet data onto existing data. */
 653                 memcpy((unsigned char *)(*assem) +
 654                                sizeof(struct ipw_rx_packet)
 655                                 + (*assem)->length, data, length);
 656                 (*assem)->length += length;
 657                 if (is_last) {
 658                         packet = *assem;
 659                         *assem = NULL;
 660                         /* Count queued DATA bytes only */
 661                         spin_lock_irqsave(&hw->spinlock, flags);
 662                         hw->rx_bytes_queued += packet->length;
 663                         spin_unlock_irqrestore(&hw->spinlock, flags);
 664                 }
 665         } else {
 666                 /* If it's a CTRL packet, don't assemble, just queue it. */
 667                 packet = pool_allocate(hw, NULL, length);
 668                 if (!packet) {
 669                         printk(KERN_ERR IPWIRELESS_PCCARD_NAME
 670                                 ": no memory for incomming ctrl packet, dropped!\n");
 671                         return;
 672                 }
 673                 packet->protocol = protocol;
 674                 packet->channel_idx = channel_idx;
 675                 memcpy((unsigned char *)packet + sizeof(struct ipw_rx_packet),
 676                                 data, length);
 677                 packet->length = length;
 678         }
 679
 680         /*
 681          * If this is the last packet, then send the assembled packet on to the
 682          * network layer.
 683          */
 684         if (packet) {
 685                 spin_lock_irqsave(&hw->spinlock, flags);
 686                 list_add_tail(&packet->queue, &hw->rx_queue);
 687                 /* Block reception of incoming packets if queue is full. */
 688                 hw->blocking_rx =
 689                         hw->rx_bytes_queued >= IPWIRELESS_RX_QUEUE_SIZE;
 690
 691                 spin_unlock_irqrestore(&hw->spinlock, flags);
 692                 schedule_work(&hw->work_rx);
 693         }
 694 }
 695
 696 /*
 697  * Workqueue callback
 698  */
 699 static void ipw_receive_data_work(struct work_struct *work_rx)
 700 {
 701         struct ipw_hardware *hw =
 702             container_of(work_rx, struct ipw_hardware, work_rx);
 703         unsigned long flags;
 704
 705         spin_lock_irqsave(&hw->spinlock, flags);
 706         while (!list_empty(&hw->rx_queue)) {
 707                 struct ipw_rx_packet *packet =
 708                         list_first_entry(&hw->rx_queue,
 709                                         struct ipw_rx_packet, queue);
 710
 711                 if (hw->shutting_down)
 712                         break;
 713                 list_del(&packet->queue);
 714
 715                 /*
 716                  * Note: ipwireless_network_packet_received must be called in a
 717                  * process context (i.e. via schedule_work) because the tty
 718                  * output code can sleep in the tty_flip_buffer_push call.
 719                  */
 720                 if (packet->protocol == TL_PROTOCOLID_COM_DATA) {
 721                         if (hw->network != NULL) {
 722                                 /* If the network hasn't been disconnected. */
 723                                 spin_unlock_irqrestore(&hw->spinlock, flags);
 724                                 /*
 725                                  * This must run unlocked due to tty processing
 726                                  * and mutex locking
 727                                  */
 728                                 ipwireless_network_packet_received(
 729                                                 hw->network,
 730                                                 packet->channel_idx,
 731                                                 (unsigned char *)packet
 732                                                 + sizeof(struct ipw_rx_packet),
 733                                                 packet->length);
 734                                 spin_lock_irqsave(&hw->spinlock, flags);
 735                         }
 736                         /* Count queued DATA bytes only */
 737                         hw->rx_bytes_queued -= packet->length;
 738                 } else {
 739                         /*
 740                          * This is safe to be called locked, callchain does
 741                          * not block
 742                          */
 743                         handle_received_CTRL_packet(hw, packet->channel_idx,
 744                                         (unsigned char *)packet
 745                                         + sizeof(struct ipw_rx_packet),
 746                                         packet->length);
 747                 }
 748                 pool_free(hw, packet);
 749                 /*
 750                  * Unblock reception of incoming packets if queue is no longer
 751                  * full.
 752                  */
 753                 hw->blocking_rx =
 754                         hw->rx_bytes_queued >= IPWIRELESS_RX_QUEUE_SIZE;
 755                 if (hw->shutting_down)
 756                         break;
 757         }
 758         spin_unlock_irqrestore(&hw->spinlock, flags);
 759 }
 760
 761 static void handle_received_CTRL_packet(struct ipw_hardware *hw,
 762                                         unsigned int channel_idx,
 763                                         unsigned char *data, int len)
 764 {
 765         struct ipw_control_packet_body *body =
 766                 (struct ipw_control_packet_body *) data;
 767         unsigned int changed_mask;
 768
 769         if (len != sizeof(struct ipw_control_packet_body)) {
 770                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 771                        ": control packet was %d bytes - wrong size!\n",
 772                        len);
 773                 return;
 774         }
 775
 776         switch (body->sig_no) {
 777         case COMCTRL_CTS:
 778                 changed_mask = IPW_CONTROL_LINE_CTS;
 779                 break;
 780         case COMCTRL_DCD:
 781                 changed_mask = IPW_CONTROL_LINE_DCD;
 782                 break;
 783         case COMCTRL_DSR:
 784                 changed_mask = IPW_CONTROL_LINE_DSR;
 785                 break;
 786         case COMCTRL_RI:
 787                 changed_mask = IPW_CONTROL_LINE_RI;
 788                 break;
 789         default:
 790                 changed_mask = 0;
 791         }
 792
 793         if (changed_mask != 0) {
 794                 if (body->value)
 795                         hw->control_lines[channel_idx] |= changed_mask;
 796                 else
 797                         hw->control_lines[channel_idx] &= ~changed_mask;
 798                 if (hw->network)
 799                         ipwireless_network_notify_control_line_change(
 800                                         hw->network,
 801                                         channel_idx,
 802                                         hw->control_lines[channel_idx],
 803                                         changed_mask);
 804         }
 805 }
 806
 807 static void handle_received_packet(struct ipw_hardware *hw,
 808                                    union nl_packet *packet,
 809                                    unsigned short len)
 810 {
 811         unsigned int protocol = packet->hdr.protocol;
 812         unsigned int address = packet->hdr.address;
 813         unsigned int header_length;
 814         unsigned char *data;
 815         unsigned int data_len;
 816         int is_last = packet->hdr.packet_rank & NL_LAST_PACKET;
 817
 818         if (packet->hdr.packet_rank & NL_FIRST_PACKET)
 819                 header_length = NL_FIRST_PACKET_HEADER_SIZE;
 820         else
 821                 header_length = NL_FOLLOWING_PACKET_HEADER_SIZE;
 822
 823         data = packet->rawpkt + header_length;
 824         data_len = len - header_length;
 825         switch (protocol) {
 826         case TL_PROTOCOLID_COM_DATA:
 827         case TL_PROTOCOLID_COM_CTRL:
 828                 queue_received_packet(hw, protocol, address, data, data_len,
 829                                 is_last);
 830                 break;
 831         case TL_PROTOCOLID_SETUP:
 832                 handle_received_SETUP_packet(hw, address, data, data_len,
 833                                 is_last);
 834                 break;
 835         }
 836 }
 837
 838 static void acknowledge_data_read(struct ipw_hardware *hw)
 839 {
 840         if (hw->hw_version == HW_VERSION_1)
 841                 outw(DCR_RXDONE, hw->base_port + IODCR);
 842         else
 843                 writew(MEMRX_PCINTACKK,
 844                                 &hw->memory_info_regs->memreg_pc_interrupt_ack);
 845 }
 846
 847 /*
 848  * Retrieve a packet from the IPW hardware.
 849  */
 850 static void do_receive_packet(struct ipw_hardware *hw)
 851 {
 852         unsigned len;
 853         unsigned int i;
 854         unsigned char pkt[LL_MTU_MAX];
 855
 856         start_timing();
 857
 858         if (hw->hw_version == HW_VERSION_1) {
 859                 len = inw(hw->base_port + IODRR);
 860                 if (len > hw->ll_mtu) {
 861                         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 862                                ": received a packet of %u bytes - "
 863                                "longer than the MTU!\n", len);
 864                         outw(DCR_RXDONE | DCR_RXRESET, hw->base_port + IODCR);
 865                         return;
 866                 }
 867
 868                 for (i = 0; i < len; i += 2) {
 869                         __le16 raw_data = inw(hw->base_port + IODRR);
 870                         unsigned short data = le16_to_cpu(raw_data);
 871
 872                         pkt[i] = (unsigned char) data;
 873                         pkt[i + 1] = (unsigned char) (data >> 8);
 874                 }
 875         } else {
 876                 len = inw(hw->base_port + IODMADPR);
 877                 if (len > hw->ll_mtu) {
 878                         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 879                                ": received a packet of %u bytes - "
 880                                "longer than the MTU!\n", len);
 881                         writew(MEMRX_PCINTACKK,
 882                                 &hw->memory_info_regs->memreg_pc_interrupt_ack);
 883                         return;
 884                 }
 885
 886                 for (i = 0; i < len; i += 2) {
 887                         __le16 raw_data = inw(hw->base_port + IODMADPR);
 888                         unsigned short data = le16_to_cpu(raw_data);
 889
 890                         pkt[i] = (unsigned char) data;
 891                         pkt[i + 1] = (unsigned char) (data >> 8);
 892                 }
 893
 894                 while ((i & 3) != 2) {
 895                         inw(hw->base_port + IODMADPR);
 896                         i += 2;
 897                 }
 898         }
 899
 900         acknowledge_data_read(hw);
 901
 902         if (ipwireless_debug)
 903                 dump_data_bytes("recv", pkt, len);
 904
 905         handle_received_packet(hw, (union nl_packet *) pkt, len);
 906
 907         end_read_timing(len);
 908 }
 909
 910 static int get_current_packet_priority(struct ipw_hardware *hw)
 911 {
 912         /*
 913          * If we're initializing, don't send anything of higher priority than
 914          * PRIO_SETUP.  The network layer therefore need not care about
 915          * hardware initialization - any of its stuff will simply be queued
 916          * until setup is complete.
 917          */
 918         return (hw->to_setup || hw->initializing
 919                         ? PRIO_SETUP + 1 :
 920                         NL_NUM_OF_PRIORITIES);
 921 }
 922
 923 /*
 924  * return 1 if something has been received from hw
 925  */
 926 static int get_packets_from_hw(struct ipw_hardware *hw)
 927 {
 928         int received = 0;
 929         unsigned long flags;
 930
 931         spin_lock_irqsave(&hw->spinlock, flags);
 932         while (hw->rx_ready && !hw->blocking_rx) {
 933                 received = 1;
 934                 hw->rx_ready--;
 935                 spin_unlock_irqrestore(&hw->spinlock, flags);
 936
 937                 do_receive_packet(hw);
 938
 939                 spin_lock_irqsave(&hw->spinlock, flags);
 940         }
 941         spin_unlock_irqrestore(&hw->spinlock, flags);
 942
 943         return received;
 944 }
 945
 946 /*
 947  * Send pending packet up to given priority, prioritize SETUP data until
 948  * hardware is fully setup.
 949  *
 950  * return 1 if more packets can be sent
 951  */
 952 static int send_pending_packet(struct ipw_hardware *hw, int priority_limit)
 953 {
 954         int more_to_send = 0;
 955         unsigned long flags;
 956
 957         spin_lock_irqsave(&hw->spinlock, flags);
 958         if (hw->tx_queued && hw->tx_ready) {
 959                 int priority;
 960                 struct ipw_tx_packet *packet = NULL;
 961
 962                 /* Pick a packet */
 963                 for (priority = 0; priority < priority_limit; priority++) {
 964                         if (!list_empty(&hw->tx_queue[priority])) {
 965                                 packet = list_first_entry(
 966                                                 &hw->tx_queue[priority],
 967                                                 struct ipw_tx_packet,
 968                                                 queue);
 969
 970                                 hw->tx_queued--;
 971                                 list_del(&packet->queue);
 972
 973                                 break;
 974                         }
 975                 }
 976                 if (!packet) {
 977                         hw->tx_queued = 0;
 978                         spin_unlock_irqrestore(&hw->spinlock, flags);
 979                         return 0;
 980                 }
 981
 982                 spin_unlock_irqrestore(&hw->spinlock, flags);
 983
 984                 /* Send */
 985                 do_send_packet(hw, packet);
 986
 987                 /* Check if more to send */
 988                 spin_lock_irqsave(&hw->spinlock, flags);
 989                 for (priority = 0; priority < priority_limit; priority++)
 990                         if (!list_empty(&hw->tx_queue[priority])) {
 991                                 more_to_send = 1;
 992                                 break;
 993                         }
 994
 995                 if (!more_to_send)
 996                         hw->tx_queued = 0;
 997         }
 998         spin_unlock_irqrestore(&hw->spinlock, flags);
 999
1000         return more_to_send;
1001 }
1002
1003 /*
1004  * Send and receive all queued packets.
1005  */
1006 static void ipwireless_do_tasklet(unsigned long hw_)
1007 {
1008         struct ipw_hardware *hw = (struct ipw_hardware *) hw_;
1009         unsigned long flags;
1010
1011         spin_lock_irqsave(&hw->spinlock, flags);
1012         if (hw->shutting_down) {
1013                 spin_unlock_irqrestore(&hw->spinlock, flags);
1014                 return;
1015         }
1016
1017         if (hw->to_setup == 1) {
1018                 /*
1019                  * Initial setup data sent to hardware
1020                  */
1021                 hw->to_setup = 2;
1022                 spin_unlock_irqrestore(&hw->spinlock, flags);
1023
1024                 ipw_setup_hardware(hw);
1025                 ipw_send_setup_packet(hw);
1026
1027                 send_pending_packet(hw, PRIO_SETUP + 1);
1028                 get_packets_from_hw(hw);
1029         } else {
1030                 int priority_limit = get_current_packet_priority(hw);
1031                 int again;
1032
1033                 spin_unlock_irqrestore(&hw->spinlock, flags);
1034
1035                 do {
1036                         again = send_pending_packet(hw, priority_limit);
1037                         again |= get_packets_from_hw(hw);
1038                 } while (again);
1039         }
1040 }
1041
1042 /*
1043  * return true if the card is physically present.
1044  */
1045 static int is_card_present(struct ipw_hardware *hw)
1046 {
1047         if (hw->hw_version == HW_VERSION_1)
1048                 return inw(hw->base_port + IOIR) != 0xFFFF;
1049         else
1050                 return readl(&hw->memory_info_regs->memreg_card_present) ==
1051                     CARD_PRESENT_VALUE;
1052 }
1053
1054 static irqreturn_t ipwireless_handle_v1_interrupt(int irq,
1055                                                   struct ipw_hardware *hw)
1056 {
1057         unsigned short irqn;
1058
1059         irqn = inw(hw->base_port + IOIR);
1060
1061         /* Check if card is present */
1062         if (irqn == 0xFFFF)
1063                 return IRQ_NONE;
1064         else if (irqn != 0) {
1065                 unsigned short ack = 0;
1066                 unsigned long flags;
1067
1068                 /* Transmit complete. */
1069                 if (irqn & IR_TXINTR) {
1070                         ack |= IR_TXINTR;
1071                         spin_lock_irqsave(&hw->spinlock, flags);
1072                         hw->tx_ready = 1;
1073                         spin_unlock_irqrestore(&hw->spinlock, flags);
1074                 }
1075                 /* Received data */
1076                 if (irqn & IR_RXINTR) {
1077                         ack |= IR_RXINTR;
1078                         spin_lock_irqsave(&hw->spinlock, flags);
1079                         hw->rx_ready++;
1080                         spin_unlock_irqrestore(&hw->spinlock, flags);
1081                 }
1082                 if (ack != 0) {
1083                         outw(ack, hw->base_port + IOIR);
1084                         tasklet_schedule(&hw->tasklet);
1085                 }
1086                 return IRQ_HANDLED;
1087         }
1088         return IRQ_NONE;
1089 }
1090
1091 static void acknowledge_pcmcia_interrupt(struct ipw_hardware *hw)
1092 {
1093         unsigned short csr = readw(&hw->memregs_CCR->reg_config_and_status);
1094
1095         csr &= 0xfffd;
1096         writew(csr, &hw->memregs_CCR->reg_config_and_status);
1097 }
1098
1099 static irqreturn_t ipwireless_handle_v2_v3_interrupt(int irq,
1100                                                      struct ipw_hardware *hw)
1101 {
1102         int tx = 0;
1103         int rx = 0;
1104         int rx_repeat = 0;
1105         int try_mem_tx_old;
1106         unsigned long flags;
1107
1108         do {
1109
1110         unsigned short memtx = readw(hw->memreg_tx);
1111         unsigned short memtx_serial;
1112         unsigned short memrxdone =
1113                 readw(&hw->memory_info_regs->memreg_rx_done);
1114
1115         try_mem_tx_old = 0;
1116
1117         /* check whether the interrupt was generated by ipwireless card */
1118         if (!(memtx & MEMTX_TX) && !(memrxdone & MEMRX_RX_DONE)) {
1119
1120                 /* check if the card uses memreg_tx_old register */
1121                 if (hw->memreg_tx == &hw->memory_info_regs->memreg_tx_new) {
1122                         memtx = readw(&hw->memory_info_regs->memreg_tx_old);
1123                         if (memtx & MEMTX_TX) {
1124                                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
1125                                         ": Using memreg_tx_old\n");
1126                                 hw->memreg_tx =
1127                                         &hw->memory_info_regs->memreg_tx_old;
1128                         } else {
1129                                 return IRQ_NONE;
1130                         }
1131                 } else {
1132                         return IRQ_NONE;
1133                 }
1134         }
1135
1136         /*
1137          * See if the card is physically present. Note that while it is
1138          * powering up, it appears not to be present.
1139          */
1140         if (!is_card_present(hw)) {
1141                 acknowledge_pcmcia_interrupt(hw);
1142                 return IRQ_HANDLED;
1143         }
1144
1145         memtx_serial = memtx & (unsigned short) 0xff00;
1146         if (memtx & MEMTX_TX) {
1147                 writew(memtx_serial, hw->memreg_tx);
1148
1149                 if (hw->serial_number_detected) {
1150                         if (memtx_serial != hw->last_memtx_serial) {
1151                                 hw->last_memtx_serial = memtx_serial;
1152                                 spin_lock_irqsave(&hw->spinlock, flags);
1153                                 hw->rx_ready++;
1154                                 spin_unlock_irqrestore(&hw->spinlock, flags);
1155                                 rx = 1;
1156                         } else
1157                                 /* Ignore 'Timer Recovery' duplicates. */
1158                                 rx_repeat = 1;
1159                 } else {
1160                         /*
1161                          * If a non-zero serial number is seen, then enable
1162                          * serial number checking.
1163                          */
1164                         if (memtx_serial != 0) {
1165                                 hw->serial_number_detected = 1;
1166                                 printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME
1167                                         ": memreg_tx serial num detected\n");
1168
1169                                 spin_lock_irqsave(&hw->spinlock, flags);
1170                                 hw->rx_ready++;
1171                                 spin_unlock_irqrestore(&hw->spinlock, flags);
1172                         }
1173                         rx = 1;
1174                 }
1175         }
1176         if (memrxdone & MEMRX_RX_DONE) {
1177                 writew(0, &hw->memory_info_regs->memreg_rx_done);
1178                 spin_lock_irqsave(&hw->spinlock, flags);
1179                 hw->tx_ready = 1;
1180                 spin_unlock_irqrestore(&hw->spinlock, flags);
1181                 tx = 1;
1182         }
1183         if (tx)
1184                 writew(MEMRX_PCINTACKK,
1185                                 &hw->memory_info_regs->memreg_pc_interrupt_ack);
1186
1187         acknowledge_pcmcia_interrupt(hw);
1188
1189         if (tx || rx)
1190                 tasklet_schedule(&hw->tasklet);
1191         else if (!rx_repeat) {
1192                 if (hw->memreg_tx == &hw->memory_info_regs->memreg_tx_new) {
1193                         if (hw->serial_number_detected)
1194                                 printk(KERN_WARNING IPWIRELESS_PCCARD_NAME
1195                                         ": spurious interrupt - new_tx mode\n");
1196                         else {
1197                                 printk(KERN_WARNING IPWIRELESS_PCCARD_NAME
1198                                         ": no valid memreg_tx value - "
1199                                         "switching to the old memreg_tx\n");
1200                                 hw->memreg_tx =
1201                                         &hw->memory_info_regs->memreg_tx_old;
1202                                 try_mem_tx_old = 1;
1203                         }
1204                 } else
1205                         printk(KERN_WARNING IPWIRELESS_PCCARD_NAME
1206                                         ": spurious interrupt - old_tx mode\n");
1207         }
1208
1209         } while (try_mem_tx_old == 1);
1210
1211         return IRQ_HANDLED;
1212 }
1213
1214 irqreturn_t ipwireless_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1215 {
1216         struct ipw_hardware *hw = dev_id;
1217
1218         if (hw->hw_version == HW_VERSION_1)
1219                 return ipwireless_handle_v1_interrupt(irq, hw);
1220         else
1221                 return ipwireless_handle_v2_v3_interrupt(irq, hw);
1222 }
1223
1224 static void flush_packets_to_hw(struct ipw_hardware *hw)
1225 {
1226         int priority_limit;
1227         unsigned long flags;
1228
1229         spin_lock_irqsave(&hw->spinlock, flags);
1230         priority_limit = get_current_packet_priority(hw);
1231         spin_unlock_irqrestore(&hw->spinlock, flags);
1232
1233         while (send_pending_packet(hw, priority_limit));
1234 }
1235
1236 static void send_packet(struct ipw_hardware *hw, int priority,
1237                         struct ipw_tx_packet *packet)
1238 {
1239         unsigned long flags;
1240
1241         spin_lock_irqsave(&hw->spinlock, flags);
1242         list_add_tail(&packet->queue, &hw->tx_queue[priority]);
1243         hw->tx_queued++;
1244         spin_unlock_irqrestore(&hw->spinlock, flags);
1245
1246         flush_packets_to_hw(hw);
1247 }
1248
1249 /* Create data packet, non-atomic allocation */
1250 static void *alloc_data_packet(int data_size,
1251                                 unsigned char dest_addr,
1252                                 unsigned char protocol)
1253 {
1254         struct ipw_tx_packet *packet = kzalloc(
1255                         sizeof(struct ipw_tx_packet) + data_size,
1256                         GFP_ATOMIC);
1257
1258         if (!packet)
1259                 return NULL;
1260
1261         INIT_LIST_HEAD(&packet->queue);
1262         packet->dest_addr = dest_addr;
1263         packet->protocol = protocol;
1264         packet->length = data_size;
1265
1266         return packet;
1267 }
1268
1269 static void *alloc_ctrl_packet(int header_size,
1270                                unsigned char dest_addr,
1271                                unsigned char protocol,
1272                                unsigned char sig_no)
1273 {
1274         /*
1275          * sig_no is located right after ipw_tx_packet struct in every
1276          * CTRL or SETUP packets, we can use ipw_control_packet as a
1277          * common struct
1278          */
1279         struct ipw_control_packet *packet = kzalloc(header_size, GFP_ATOMIC);
1280
1281         if (!packet)
1282                 return NULL;
1283
1284         INIT_LIST_HEAD(&packet->header.queue);
1285         packet->header.dest_addr = dest_addr;
1286         packet->header.protocol = protocol;
1287         packet->header.length = header_size - sizeof(struct ipw_tx_packet);
1288         packet->body.sig_no = sig_no;
1289
1290         return packet;
1291 }
1292
1293 int ipwireless_send_packet(struct ipw_hardware *hw, unsigned int channel_idx,
1294                             unsigned char *data, unsigned int length,
1295                             void (*callback) (void *cb, unsigned int length),
1296                             void *callback_data)
1297 {
1298         struct ipw_tx_packet *packet;
1299
1300         packet = alloc_data_packet(length,
1301                                (unsigned char) (channel_idx + 1),
1302                                TL_PROTOCOLID_COM_DATA);
1303         if (!packet)
1304                 return -ENOMEM;
1305         packet->packet_callback = callback;
1306         packet->callback_data = callback_data;
1307         memcpy((unsigned char *) packet +
1308                         sizeof(struct ipw_tx_packet), data, length);
1309
1310         send_packet(hw, PRIO_DATA, packet);
1311         return 0;
1312 }
1313
1314 static int set_control_line(struct ipw_hardware *hw, int prio,
1315                            unsigned int channel_idx, int line, int state)
1316 {
1317         struct ipw_control_packet *packet;
1318         int protocolid = TL_PROTOCOLID_COM_CTRL;
1319
1320         if (prio == PRIO_SETUP)
1321                 protocolid = TL_PROTOCOLID_SETUP;
1322
1323         packet = alloc_ctrl_packet(sizeof(struct ipw_control_packet),
1324                         (unsigned char) (channel_idx + 1),
1325                         protocolid, line);
1326         if (!packet)
1327                 return -ENOMEM;
1328         packet->header.length = sizeof(struct ipw_control_packet_body);
1329         packet->body.value = (unsigned char) (state == 0 ? 0 : 1);
1330         send_packet(hw, prio, &packet->header);
1331         return 0;
1332 }
1333
1334
1335 static int set_DTR(struct ipw_hardware *hw, int priority,
1336                    unsigned int channel_idx, int state)
1337 {
1338         if (state != 0)
1339                 hw->control_lines[channel_idx] |= IPW_CONTROL_LINE_DTR;
1340         else
1341                 hw->control_lines[channel_idx] &= ~IPW_CONTROL_LINE_DTR;
1342
1343         return set_control_line(hw, priority, channel_idx, COMCTRL_DTR, state);
1344 }
1345
1346 static int set_RTS(struct ipw_hardware *hw, int priority,
1347                    unsigned int channel_idx, int state)
1348 {
1349         if (state != 0)
1350                 hw->control_lines[channel_idx] |= IPW_CONTROL_LINE_RTS;
1351         else
1352                 hw->control_lines[channel_idx] &= ~IPW_CONTROL_LINE_RTS;
1353
1354         return set_control_line(hw, priority, channel_idx, COMCTRL_RTS, state);
1355 }
1356
1357 int ipwireless_set_DTR(struct ipw_hardware *hw, unsigned int channel_idx,
1358                        int state)
1359 {
1360         return set_DTR(hw, PRIO_CTRL, channel_idx, state);
1361 }
1362
1363 int ipwireless_set_RTS(struct ipw_hardware *hw, unsigned int channel_idx,
1364                        int state)
1365 {
1366         return set_RTS(hw, PRIO_CTRL, channel_idx, state);
1367 }
1368
1369 struct ipw_setup_get_version_query_packet {
1370         struct ipw_tx_packet header;
1371         struct tl_setup_get_version_qry body;
1372 };
1373
1374 struct ipw_setup_config_packet {
1375         struct ipw_tx_packet header;
1376         struct tl_setup_config_msg body;
1377 };
1378
1379 struct ipw_setup_config_done_packet {
1380         struct ipw_tx_packet header;
1381         struct tl_setup_config_done_msg body;
1382 };
1383
1384 struct ipw_setup_open_packet {
1385         struct ipw_tx_packet header;
1386         struct tl_setup_open_msg body;
1387 };
1388
1389 struct ipw_setup_info_packet {
1390         struct ipw_tx_packet header;
1391         struct tl_setup_info_msg body;
1392 };
1393
1394 struct ipw_setup_reboot_msg_ack {
1395         struct ipw_tx_packet header;
1396         struct TlSetupRebootMsgAck body;
1397 };
1398
1399 /* This handles the actual initialization of the card */
1400 static void __handle_setup_get_version_rsp(struct ipw_hardware *hw)
1401 {
1402         struct ipw_setup_config_packet *config_packet;
1403         struct ipw_setup_config_done_packet *config_done_packet;
1404         struct ipw_setup_open_packet *open_packet;
1405         struct ipw_setup_info_packet *info_packet;
1406         int port;
1407         unsigned int channel_idx;
1408
1409         /* generate config packet */
1410         for (port = 1; port <= NL_NUM_OF_ADDRESSES; port++) {
1411                 config_packet = alloc_ctrl_packet(
1412                                 sizeof(struct ipw_setup_config_packet),
1413                                 ADDR_SETUP_PROT,
1414                                 TL_PROTOCOLID_SETUP,
1415                                 TL_SETUP_SIGNO_CONFIG_MSG);
1416                 if (!config_packet)
1417                         goto exit_nomem;
1418                 config_packet->header.length = sizeof(struct tl_setup_config_msg);
1419                 config_packet->body.port_no = port;
1420                 config_packet->body.prio_data = PRIO_DATA;
1421                 config_packet->body.prio_ctrl = PRIO_CTRL;
1422                 send_packet(hw, PRIO_SETUP, &config_packet->header);
1423         }
1424         config_done_packet = alloc_ctrl_packet(
1425                         sizeof(struct ipw_setup_config_done_packet),
1426                         ADDR_SETUP_PROT,
1427                         TL_PROTOCOLID_SETUP,
1428                         TL_SETUP_SIGNO_CONFIG_DONE_MSG);
1429         if (!config_done_packet)
1430                 goto exit_nomem;
1431         config_done_packet->header.length = sizeof(struct tl_setup_config_done_msg);
1432         send_packet(hw, PRIO_SETUP, &config_done_packet->header);
1433
1434         /* generate open packet */
1435         for (port = 1; port <= NL_NUM_OF_ADDRESSES; port++) {
1436                 open_packet = alloc_ctrl_packet(
1437                                 sizeof(struct ipw_setup_open_packet),
1438                                 ADDR_SETUP_PROT,
1439                                 TL_PROTOCOLID_SETUP,
1440                                 TL_SETUP_SIGNO_OPEN_MSG);
1441                 if (!open_packet)
1442                         goto exit_nomem;
1443                 open_packet->header.length = sizeof(struct tl_setup_open_msg);
1444                 open_packet->body.port_no = port;
1445                 send_packet(hw, PRIO_SETUP, &open_packet->header);
1446         }
1447         for (channel_idx = 0;
1448                         channel_idx < NL_NUM_OF_ADDRESSES; channel_idx++) {
1449                 int ret;
1450
1451                 ret = set_DTR(hw, PRIO_SETUP, channel_idx,
1452                         (hw->control_lines[channel_idx] &
1453                          IPW_CONTROL_LINE_DTR) != 0);
1454                 if (ret) {
1455                         printk(KERN_ERR IPWIRELESS_PCCARD_NAME
1456                                         ": error setting DTR (%d)\n", ret);
1457                         return;
1458                 }
1459
1460                 set_RTS(hw, PRIO_SETUP, channel_idx,
1461                         (hw->control_lines [channel_idx] &
1462                          IPW_CONTROL_LINE_RTS) != 0);
1463                 if (ret) {
1464                         printk(KERN_ERR IPWIRELESS_PCCARD_NAME
1465                                         ": error setting RTS (%d)\n", ret);
1466                         return;
1467                 }
1468         }
1469         /*
1470          * For NDIS we assume that we are using sync PPP frames, for COM async.
1471          * This driver uses NDIS mode too. We don't bother with translation
1472          * from async -> sync PPP.
1473          */
1474         info_packet = alloc_ctrl_packet(sizeof(struct ipw_setup_info_packet),
1475                         ADDR_SETUP_PROT,
1476                         TL_PROTOCOLID_SETUP,
1477                         TL_SETUP_SIGNO_INFO_MSG);
1478         if (!info_packet)
1479                 goto exit_nomem;
1480         info_packet->header.length = sizeof(struct tl_setup_info_msg);
1481         info_packet->body.driver_type = NDISWAN_DRIVER;
1482         info_packet->body.major_version = NDISWAN_DRIVER_MAJOR_VERSION;
1483         info_packet->body.minor_version = NDISWAN_DRIVER_MINOR_VERSION;
1484         send_packet(hw, PRIO_SETUP, &info_packet->header);
1485
1486         /* Initialization is now complete, so we clear the 'to_setup' flag */
1487         hw->to_setup = 0;
1488
1489         return;
1490
1491 exit_nomem:
1492         printk(KERN_ERR IPWIRELESS_PCCARD_NAME
1493                         ": not enough memory to alloc control packet\n");
1494         hw->to_setup = -1;
1495 }
1496
1497 static void handle_setup_get_version_rsp(struct ipw_hardware *hw,
1498                 unsigned char vers_no)
1499 {
1500         del_timer(&hw->setup_timer);
1501         hw->initializing = 0;
1502         printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": card is ready.\n");
1503
1504         if (vers_no == TL_SETUP_VERSION)
1505                 __handle_setup_get_version_rsp(hw);
1506         else
1507                 printk(KERN_ERR
1508                                 IPWIRELESS_PCCARD_NAME
1509                                 ": invalid hardware version no %u\n",
1510                                 (unsigned int) vers_no);
1511 }
1512
1513 static void ipw_send_setup_packet(struct ipw_hardware *hw)
1514 {
1515         struct ipw_setup_get_version_query_packet *ver_packet;
1516
1517         ver_packet = alloc_ctrl_packet(
1518                         sizeof(struct ipw_setup_get_version_query_packet),
1519                         ADDR_SETUP_PROT, TL_PROTOCOLID_SETUP,
1520                         TL_SETUP_SIGNO_GET_VERSION_QRY);
1521         ver_packet->header.length = sizeof(struct tl_setup_get_version_qry);
1522
1523         /*
1524          * Response is handled in handle_received_SETUP_packet
1525          */
1526         send_packet(hw, PRIO_SETUP, &ver_packet->header);
1527 }
1528
1529 static void handle_received_SETUP_packet(struct ipw_hardware *hw,
1530                                          unsigned int address,
1531                                          unsigned char *data, int len,
1532                                          int is_last)
1533 {
1534         union ipw_setup_rx_msg *rx_msg = (union ipw_setup_rx_msg *) data;
1535
1536         if (address != ADDR_SETUP_PROT) {
1537                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
1538                        ": setup packet has bad address %d\n", address);
1539                 return;
1540         }
1541
1542         switch (rx_msg->sig_no) {
1543         case TL_SETUP_SIGNO_GET_VERSION_RSP:
1544                 if (hw->to_setup)
1545                         handle_setup_get_version_rsp(hw,
1546                                         rx_msg->version_rsp_msg.version);
1547                 break;
1548
1549         case TL_SETUP_SIGNO_OPEN_MSG:
1550                 if (ipwireless_debug) {
1551                         unsigned int channel_idx = rx_msg->open_msg.port_no - 1;
1552
1553                         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
1554                                ": OPEN_MSG [channel %u] reply received\n",
1555                                channel_idx);
1556                 }
1557                 break;
1558
1559         case TL_SETUP_SIGNO_INFO_MSG_ACK:
1560                 if (ipwireless_debug)
1561                         printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME
1562                                ": card successfully configured as NDISWAN\n");
1563                 break;
1564
1565         case TL_SETUP_SIGNO_REBOOT_MSG:
1566                 if (hw->to_setup)
1567                         printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME
1568                                ": Setup not completed - ignoring reboot msg\n");
1569                 else {
1570                         struct ipw_setup_reboot_msg_ack *packet;
1571
1572                         printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME
1573                                ": Acknowledging REBOOT message\n");
1574                         packet = alloc_ctrl_packet(
1575                                         sizeof(struct ipw_setup_reboot_msg_ack),
1576                                         ADDR_SETUP_PROT, TL_PROTOCOLID_SETUP,
1577                                         TL_SETUP_SIGNO_REBOOT_MSG_ACK);
1578                         packet->header.length =
1579                                 sizeof(struct TlSetupRebootMsgAck);
1580                         send_packet(hw, PRIO_SETUP, &packet->header);
1581                         if (hw->reboot_callback)
1582                                 hw->reboot_callback(hw->reboot_callback_data);
1583                 }
1584                 break;
1585
1586         default:
1587                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
1588                        ": unknown setup message %u received\n",
1589                        (unsigned int) rx_msg->sig_no);
1590         }
1591 }
1592
1593 static void do_close_hardware(struct ipw_hardware *hw)
1594 {
1595         unsigned int irqn;
1596
1597         if (hw->hw_version == HW_VERSION_1) {
1598                 /* Disable TX and RX interrupts. */
1599                 outw(0, hw->base_port + IOIER);
1600
1601                 /* Acknowledge any outstanding interrupt requests */
1602                 irqn = inw(hw->base_port + IOIR);
1603                 if (irqn & IR_TXINTR)
1604                         outw(IR_TXINTR, hw->base_port + IOIR);
1605                 if (irqn & IR_RXINTR)
1606                         outw(IR_RXINTR, hw->base_port + IOIR);
1607
1608                 synchronize_irq(hw->irq);
1609         }
1610 }
1611
1612 struct ipw_hardware *ipwireless_hardware_create(void)
1613 {
1614         int i;
1615         struct ipw_hardware *hw =
1616                 kzalloc(sizeof(struct ipw_hardware), GFP_KERNEL);
1617
1618         if (!hw)
1619                 return NULL;
1620
1621         hw->irq = -1;
1622         hw->initializing = 1;
1623         hw->tx_ready = 1;
1624         hw->rx_bytes_queued = 0;
1625         hw->rx_pool_size = 0;
1626         hw->last_memtx_serial = (unsigned short) 0xffff;
1627         for (i = 0; i < NL_NUM_OF_PRIORITIES; i++)
1628                 INIT_LIST_HEAD(&hw->tx_queue[i]);
1629
1630         INIT_LIST_HEAD(&hw->rx_queue);
1631         INIT_LIST_HEAD(&hw->rx_pool);
1632         spin_lock_init(&hw->spinlock);
1633         tasklet_init(&hw->tasklet, ipwireless_do_tasklet, (unsigned long) hw);
1634         INIT_WORK(&hw->work_rx, ipw_receive_data_work);
1635         setup_timer(&hw->setup_timer, ipwireless_setup_timer,
1636                         (unsigned long) hw);
1637
1638         return hw;
1639 }
1640
1641 void ipwireless_init_hardware_v1(struct ipw_hardware *hw,
1642                 unsigned int base_port,
1643                 void __iomem *attr_memory,
1644                 void __iomem *common_memory,
1645                 int is_v2_card,
1646                 void (*reboot_callback) (void *data),
1647                 void *reboot_callback_data)
1648 {
1649         if (hw->removed) {
1650                 hw->removed = 0;
1651                 enable_irq(hw->irq);
1652         }
1653         hw->base_port = base_port;
1654         hw->hw_version = is_v2_card ? HW_VERSION_2 : HW_VERSION_1;
1655         hw->ll_mtu = hw->hw_version == HW_VERSION_1 ? LL_MTU_V1 : LL_MTU_V2;
1656         hw->memregs_CCR = (struct MEMCCR __iomem *)
1657                         ((unsigned short __iomem *) attr_memory + 0x200);
1658         hw->memory_info_regs = (struct MEMINFREG __iomem *) common_memory;
1659         hw->memreg_tx = &hw->memory_info_regs->memreg_tx_new;
1660         hw->reboot_callback = reboot_callback;
1661         hw->reboot_callback_data = reboot_callback_data;
1662 }
1663
1664 void ipwireless_init_hardware_v2_v3(struct ipw_hardware *hw)
1665 {
1666         hw->initializing = 1;
1667         hw->init_loops = 0;
1668         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
1669                ": waiting for card to start up...\n");
1670         ipwireless_setup_timer((unsigned long) hw);
1671 }
1672
1673 static void ipwireless_setup_timer(unsigned long data)
1674 {
1675         struct ipw_hardware *hw = (struct ipw_hardware *) data;
1676
1677         hw->init_loops++;
1678
1679         if (hw->init_loops == TL_SETUP_MAX_VERSION_QRY &&
1680                         hw->hw_version == HW_VERSION_2 &&
1681                         hw->memreg_tx == &hw->memory_info_regs->memreg_tx_new) {
1682                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
1683                                 ": failed to startup using TX2, trying TX\n");
1684
1685                 hw->memreg_tx = &hw->memory_info_regs->memreg_tx_old;
1686                 hw->init_loops = 0;
1687         }
1688         /* Give up after a certain number of retries */
1689         if (hw->init_loops == TL_SETUP_MAX_VERSION_QRY) {
1690                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
1691                        ": card failed to start up!\n");
1692                 hw->initializing = 0;
1693         } else {
1694                 /* Do not attempt to write to the board if it is not present. */
1695                 if (is_card_present(hw)) {
1696                         unsigned long flags;
1697
1698                         spin_lock_irqsave(&hw->spinlock, flags);
1699                         hw->to_setup = 1;
1700                         hw->tx_ready = 1;
1701                         spin_unlock_irqrestore(&hw->spinlock, flags);
1702                         tasklet_schedule(&hw->tasklet);
1703                 }
1704
1705                 mod_timer(&hw->setup_timer,
1706                         jiffies + msecs_to_jiffies(TL_SETUP_VERSION_QRY_TMO));
1707         }
1708 }
1709
1710 /*
1711  * Stop any interrupts from executing so that, once this function returns,
1712  * other layers of the driver can be sure they won't get any more callbacks.
1713  * Thus must be called on a proper process context.
1714  */
1715 void ipwireless_stop_interrupts(struct ipw_hardware *hw)
1716 {
1717         if (!hw->shutting_down) {
1718                 /* Tell everyone we are going down. */
1719                 hw->shutting_down = 1;
1720                 del_timer(&hw->setup_timer);
1721
1722                 /* Prevent the hardware from sending any more interrupts */
1723                 do_close_hardware(hw);
1724         }
1725 }
1726
1727 void ipwireless_hardware_free(struct ipw_hardware *hw)
1728 {
1729         int i;
1730         struct ipw_rx_packet *rp, *rq;
1731         struct ipw_tx_packet *tp, *tq;
1732
1733         ipwireless_stop_interrupts(hw);
1734
1735         flush_scheduled_work();
1736
1737         for (i = 0; i < NL_NUM_OF_ADDRESSES; i++)
1738                 if (hw->packet_assembler[i] != NULL)
1739                         kfree(hw->packet_assembler[i]);
1740
1741         for (i = 0; i < NL_NUM_OF_PRIORITIES; i++)
1742                 list_for_each_entry_safe(tp, tq, &hw->tx_queue[i], queue) {
1743                         list_del(&tp->queue);
1744                         kfree(tp);
1745                 }
1746
1747         list_for_each_entry_safe(rp, rq, &hw->rx_queue, queue) {
1748                 list_del(&rp->queue);
1749                 kfree(rp);
1750         }
1751
1752         list_for_each_entry_safe(rp, rq, &hw->rx_pool, queue) {
1753                 list_del(&rp->queue);
1754                 kfree(rp);
1755         }
1756         kfree(hw);
1757 }
1758
1759 /*
1760  * Associate the specified network with this hardware, so it will receive events
1761  * from it.
1762  */
1763 void ipwireless_associate_network(struct ipw_hardware *hw,
1764                                   struct ipw_network *network)
1765 {
1766         hw->network = network;
1767 }