err.no Git - linux-2.6/blob - 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, wrote %lu bytes in %u us\n",
  83                                jiffies_to_usecs(since),
  84                                timing_stats.read_bytes,
  85                                jiffies_to_usecs(timing_stats.read_time),
  86                                timing_stats.write_bytes,
  87                                jiffies_to_usecs(timing_stats.write_time));
  88
  89                 timing_stats.read_time = 0;
  90                 timing_stats.write_time = 0;
  91                 timing_stats.read_bytes = 0;
  92                 timing_stats.write_bytes = 0;
  93         }
  94 }
  95 #else
  96 static void start_timing(void) { }
  97 static void end_read_timing(unsigned length) { }
  98 static void end_write_timing(unsigned length) { }
  99 #endif
 100
 101 /* Imported IPW definitions */
 102
 103 #define LL_MTU_V1 318
 104 #define LL_MTU_V2 250
 105 #define LL_MTU_MAX (LL_MTU_V1 > LL_MTU_V2 ? LL_MTU_V1 : LL_MTU_V2)
 106
 107 #define PRIO_DATA  2
 108 #define PRIO_CTRL  1
 109 #define PRIO_SETUP 0
 110
 111 /* Addresses */
 112 #define ADDR_SETUP_PROT 0
 113
 114 /* Protocol ids */
 115 enum {
 116         /* Identifier for the Com Data protocol */
 117         TL_PROTOCOLID_COM_DATA = 0,
 118
 119         /* Identifier for the Com Control protocol */
 120         TL_PROTOCOLID_COM_CTRL = 1,
 121
 122         /* Identifier for the Setup protocol */
 123         TL_PROTOCOLID_SETUP = 2
 124 };
 125
 126 /* Number of bytes in NL packet header (cannot do
 127  * sizeof(nl_packet_header) since it's a bitfield) */
 128 #define NL_FIRST_PACKET_HEADER_SIZE        3
 129
 130 /* Number of bytes in NL packet header (cannot do
 131  * sizeof(nl_packet_header) since it's a bitfield) */
 132 #define NL_FOLLOWING_PACKET_HEADER_SIZE    1
 133
 134 struct nl_first_packet_header {
 135         unsigned char protocol:3;
 136         unsigned char address:3;
 137         unsigned char packet_rank:2;
 138         unsigned char length_lsb;
 139         unsigned char length_msb;
 140 };
 141
 142 struct nl_packet_header {
 143         unsigned char protocol:3;
 144         unsigned char address:3;
 145         unsigned char packet_rank:2;
 146 };
 147
 148 /* Value of 'packet_rank' above */
 149 #define NL_INTERMEDIATE_PACKET    0x0
 150 #define NL_LAST_PACKET            0x1
 151 #define NL_FIRST_PACKET           0x2
 152
 153 union nl_packet {
 154         /* Network packet header of the first packet (a special case) */
 155         struct nl_first_packet_header hdr_first;
 156         /* Network packet header of the following packets (if any) */
 157         struct nl_packet_header hdr;
 158         /* Complete network packet (header + data) */
 159         unsigned char rawpkt[LL_MTU_MAX];
 160 } __attribute__ ((__packed__));
 161
 162 #define HW_VERSION_UNKNOWN -1
 163 #define HW_VERSION_1 1
 164 #define HW_VERSION_2 2
 165
 166 /* IPW I/O ports */
 167 #define IOIER 0x00              /* Interrupt Enable Register */
 168 #define IOIR  0x02              /* Interrupt Source/ACK register */
 169 #define IODCR 0x04              /* Data Control Register */
 170 #define IODRR 0x06              /* Data Read Register */
 171 #define IODWR 0x08              /* Data Write Register */
 172 #define IOESR 0x0A              /* Embedded Driver Status Register */
 173 #define IORXR 0x0C              /* Rx Fifo Register (Host to Embedded) */
 174 #define IOTXR 0x0E              /* Tx Fifo Register (Embedded to Host) */
 175
 176 /* I/O ports and bit definitions for version 1 of the hardware */
 177
 178 /* IER bits*/
 179 #define IER_RXENABLED   0x1
 180 #define IER_TXENABLED   0x2
 181
 182 /* ISR bits */
 183 #define IR_RXINTR       0x1
 184 #define IR_TXINTR       0x2
 185
 186 /* DCR bits */
 187 #define DCR_RXDONE      0x1
 188 #define DCR_TXDONE      0x2
 189 #define DCR_RXRESET     0x4
 190 #define DCR_TXRESET     0x8
 191
 192 /* I/O ports and bit definitions for version 2 of the hardware */
 193
 194 struct MEMCCR {
 195         unsigned short reg_config_option;       /* PCCOR: Configuration Option Register */
 196         unsigned short reg_config_and_status;   /* PCCSR: Configuration and Status Register */
 197         unsigned short reg_pin_replacement;     /* PCPRR: Pin Replacemant Register */
 198         unsigned short reg_socket_and_copy;     /* PCSCR: Socket and Copy Register */
 199         unsigned short reg_ext_status;          /* PCESR: Extendend Status Register */
 200         unsigned short reg_io_base;             /* PCIOB: I/O Base Register */
 201 };
 202
 203 struct MEMINFREG {
 204         unsigned short memreg_tx_old;   /* TX Register (R/W) */
 205         unsigned short pad1;
 206         unsigned short memreg_rx_done;  /* RXDone Register (R/W) */
 207         unsigned short pad2;
 208         unsigned short memreg_rx;       /* RX Register (R/W) */
 209         unsigned short pad3;
 210         unsigned short memreg_pc_interrupt_ack; /* PC intr Ack Register (W) */
 211         unsigned short pad4;
 212         unsigned long memreg_card_present;/* Mask for Host to check (R) for
 213                                            * CARD_PRESENT_VALUE */
 214         unsigned short memreg_tx_new;   /* TX2 (new) Register (R/W) */
 215 };
 216
 217 #define CARD_PRESENT_VALUE (0xBEEFCAFEUL)
 218
 219 #define MEMTX_TX                       0x0001
 220 #define MEMRX_RX                       0x0001
 221 #define MEMRX_RX_DONE                  0x0001
 222 #define MEMRX_PCINTACKK                0x0001
 223
 224 #define NL_NUM_OF_PRIORITIES       3
 225 #define NL_NUM_OF_PROTOCOLS        3
 226 #define NL_NUM_OF_ADDRESSES        NO_OF_IPW_CHANNELS
 227
 228 struct ipw_hardware {
 229         unsigned int base_port;
 230         short hw_version;
 231         unsigned short ll_mtu;
 232         spinlock_t lock;
 233
 234         int initializing;
 235         int init_loops;
 236         struct timer_list setup_timer;
 237
 238         /* Flag if hw is ready to send next packet */
 239         int tx_ready;
 240         /* Count of pending packets to be sent */
 241         int tx_queued;
 242         struct list_head tx_queue[NL_NUM_OF_PRIORITIES];
 243
 244         int rx_bytes_queued;
 245         struct list_head rx_queue;
 246         /* Pool of rx_packet structures that are not currently used. */
 247         struct list_head rx_pool;
 248         int rx_pool_size;
 249         /* True if reception of data is blocked while userspace processes it. */
 250         int blocking_rx;
 251         /* True if there is RX data ready on the hardware. */
 252         int rx_ready;
 253         unsigned short last_memtx_serial;
 254         /*
 255          * Newer versions of the V2 card firmware send serial numbers in the
 256          * MemTX register. 'serial_number_detected' is set true when we detect
 257          * a non-zero serial number (indicating the new firmware).  Thereafter,
 258          * the driver can safely ignore the Timer Recovery re-sends to avoid
 259          * out-of-sync problems.
 260          */
 261         int serial_number_detected;
 262         struct work_struct work_rx;
 263
 264         /* True if we are to send the set-up data to the hardware. */
 265         int to_setup;
 266
 267         /* Card has been removed */
 268         int removed;
 269         /* Saved irq value when we disable the interrupt. */
 270         int irq;
 271         /* True if this driver is shutting down. */
 272         int shutting_down;
 273         /* Modem control lines */
 274         unsigned int control_lines[NL_NUM_OF_ADDRESSES];
 275         struct ipw_rx_packet *packet_assembler[NL_NUM_OF_ADDRESSES];
 276
 277         struct tasklet_struct tasklet;
 278
 279         /* The handle for the network layer, for the sending of events to it. */
 280         struct ipw_network *network;
 281         struct MEMINFREG __iomem *memory_info_regs;
 282         struct MEMCCR __iomem *memregs_CCR;
 283         void (*reboot_callback) (void *data);
 284         void *reboot_callback_data;
 285
 286         unsigned short __iomem *memreg_tx;
 287 };
 288
 289 /*
 290  * Packet info structure for tx packets.
 291  * Note: not all the fields defined here are required for all protocols
 292  */
 293 struct ipw_tx_packet {
 294         struct list_head queue;
 295         /* channel idx + 1 */
 296         unsigned char dest_addr;
 297         /* SETUP, CTRL or DATA */
 298         unsigned char protocol;
 299         /* Length of data block, which starts at the end of this structure */
 300         unsigned short length;
 301         /* Sending state */
 302         /* Offset of where we've sent up to so far */
 303         unsigned long offset;
 304         /* Count of packet fragments, starting at 0 */
 305         int fragment_count;
 306
 307         /* Called after packet is sent and before is freed */
 308         void (*packet_callback) (void *cb_data, unsigned int packet_length);
 309         void *callback_data;
 310 };
 311
 312 /* Signals from DTE */
 313 #define COMCTRL_RTS     0
 314 #define COMCTRL_DTR     1
 315
 316 /* Signals from DCE */
 317 #define COMCTRL_CTS     2
 318 #define COMCTRL_DCD     3
 319 #define COMCTRL_DSR     4
 320 #define COMCTRL_RI      5
 321
 322 struct ipw_control_packet_body {
 323         /* DTE signal or DCE signal */
 324         unsigned char sig_no;
 325         /* 0: set signal, 1: clear signal */
 326         unsigned char value;
 327 } __attribute__ ((__packed__));
 328
 329 struct ipw_control_packet {
 330         struct ipw_tx_packet header;
 331         struct ipw_control_packet_body body;
 332 };
 333
 334 struct ipw_rx_packet {
 335         struct list_head queue;
 336         unsigned int capacity;
 337         unsigned int length;
 338         unsigned int protocol;
 339         unsigned int channel_idx;
 340 };
 341
 342 static char *data_type(const unsigned char *buf, unsigned length)
 343 {
 344         struct nl_packet_header *hdr = (struct nl_packet_header *) buf;
 345
 346         if (length == 0)
 347                 return "     ";
 348
 349         if (hdr->packet_rank & NL_FIRST_PACKET) {
 350                 switch (hdr->protocol) {
 351                 case TL_PROTOCOLID_COM_DATA:    return "DATA ";
 352                 case TL_PROTOCOLID_COM_CTRL:    return "CTRL ";
 353                 case TL_PROTOCOLID_SETUP:       return "SETUP";
 354                 default: return "???? ";
 355                 }
 356         } else
 357                 return "     ";
 358 }
 359
 360 #define DUMP_MAX_BYTES 64
 361
 362 static void dump_data_bytes(const char *type, const unsigned char *data,
 363                             unsigned length)
 364 {
 365         char prefix[56];
 366
 367         sprintf(prefix, IPWIRELESS_PCCARD_NAME ": %s %s ",
 368                         type, data_type(data, length));
 369         print_hex_dump_bytes(prefix, 0, (void *)data,
 370                         length < DUMP_MAX_BYTES ? length : DUMP_MAX_BYTES);
 371 }
 372
 373 static void swap_packet_bitfield_to_le(unsigned char *data)
 374 {
 375 #ifdef __BIG_ENDIAN_BITFIELD
 376         unsigned char tmp = *data, ret = 0;
 377
 378         /*
 379          * transform bits from aa.bbb.ccc to ccc.bbb.aa
 380          */
 381         ret |= tmp & 0xc0 >> 6;
 382         ret |= tmp & 0x38 >> 1;
 383         ret |= tmp & 0x07 << 5;
 384         *data = ret & 0xff;
 385 #endif
 386 }
 387
 388 static void swap_packet_bitfield_from_le(unsigned char *data)
 389 {
 390 #ifdef __BIG_ENDIAN_BITFIELD
 391         unsigned char tmp = *data, ret = 0;
 392
 393         /*
 394          * transform bits from ccc.bbb.aa to aa.bbb.ccc
 395          */
 396         ret |= tmp & 0xe0 >> 5;
 397         ret |= tmp & 0x1c << 1;
 398         ret |= tmp & 0x03 << 6;
 399         *data = ret & 0xff;
 400 #endif
 401 }
 402
 403 static void do_send_fragment(struct ipw_hardware *hw, unsigned char *data,
 404                             unsigned length)
 405 {
 406         unsigned i;
 407         unsigned long flags;
 408
 409         start_timing();
 410         BUG_ON(length > hw->ll_mtu);
 411
 412         if (ipwireless_debug)
 413                 dump_data_bytes("send", data, length);
 414
 415         spin_lock_irqsave(&hw->lock, flags);
 416
 417         hw->tx_ready = 0;
 418         swap_packet_bitfield_to_le(data);
 419
 420         if (hw->hw_version == HW_VERSION_1) {
 421                 outw((unsigned short) length, hw->base_port + IODWR);
 422
 423                 for (i = 0; i < length; i += 2) {
 424                         unsigned short d = data[i];
 425                         __le16 raw_data;
 426
 427                         if (i + 1 < length)
 428                                 d |= data[i + 1] << 8;
 429                         raw_data = cpu_to_le16(d);
 430                         outw(raw_data, hw->base_port + IODWR);
 431                 }
 432
 433                 outw(DCR_TXDONE, hw->base_port + IODCR);
 434         } else if (hw->hw_version == HW_VERSION_2) {
 435                 outw((unsigned short) length, hw->base_port);
 436
 437                 for (i = 0; i < length; i += 2) {
 438                         unsigned short d = data[i];
 439                         __le16 raw_data;
 440
 441                         if (i + 1 < length)
 442                                 d |= data[i + 1] << 8;
 443                         raw_data = cpu_to_le16(d);
 444                         outw(raw_data, hw->base_port);
 445                 }
 446                 while ((i & 3) != 2) {
 447                         outw((unsigned short) 0xDEAD, hw->base_port);
 448                         i += 2;
 449                 }
 450                 writew(MEMRX_RX, &hw->memory_info_regs->memreg_rx);
 451         }
 452
 453         spin_unlock_irqrestore(&hw->lock, flags);
 454
 455         end_write_timing(length);
 456 }
 457
 458 static void do_send_packet(struct ipw_hardware *hw, struct ipw_tx_packet *packet)
 459 {
 460         unsigned short fragment_data_len;
 461         unsigned short data_left = packet->length - packet->offset;
 462         unsigned short header_size;
 463         union nl_packet pkt;
 464
 465         header_size =
 466             (packet->fragment_count == 0)
 467             ? NL_FIRST_PACKET_HEADER_SIZE
 468             : NL_FOLLOWING_PACKET_HEADER_SIZE;
 469         fragment_data_len = hw->ll_mtu - header_size;
 470         if (data_left < fragment_data_len)
 471                 fragment_data_len = data_left;
 472
 473         /*
 474          * hdr_first is now in machine bitfield order, which will be swapped
 475          * to le just before it goes to hw
 476          */
 477         pkt.hdr_first.protocol = packet->protocol;
 478         pkt.hdr_first.address = packet->dest_addr;
 479         pkt.hdr_first.packet_rank = 0;
 480
 481         /* First packet? */
 482         if (packet->fragment_count == 0) {
 483                 pkt.hdr_first.packet_rank |= NL_FIRST_PACKET;
 484                 pkt.hdr_first.length_lsb = (unsigned char) packet->length;
 485                 pkt.hdr_first.length_msb =
 486                         (unsigned char) (packet->length >> 8);
 487         }
 488
 489         memcpy(pkt.rawpkt + header_size,
 490                ((unsigned char *) packet) + sizeof(struct ipw_tx_packet) +
 491                packet->offset, fragment_data_len);
 492         packet->offset += fragment_data_len;
 493         packet->fragment_count++;
 494
 495         /* Last packet? (May also be first packet.) */
 496         if (packet->offset == packet->length)
 497                 pkt.hdr_first.packet_rank |= NL_LAST_PACKET;
 498         do_send_fragment(hw, pkt.rawpkt, header_size + fragment_data_len);
 499
 500         /* If this packet has unsent data, then re-queue it. */
 501         if (packet->offset < packet->length) {
 502                 /*
 503                  * Re-queue it at the head of the highest priority queue so
 504                  * it goes before all other packets
 505                  */
 506                 unsigned long flags;
 507
 508                 spin_lock_irqsave(&hw->lock, flags);
 509                 list_add(&packet->queue, &hw->tx_queue[0]);
 510                 hw->tx_queued++;
 511                 spin_unlock_irqrestore(&hw->lock, flags);
 512         } else {
 513                 if (packet->packet_callback)
 514                         packet->packet_callback(packet->callback_data,
 515                                         packet->length);
 516                 kfree(packet);
 517         }
 518 }
 519
 520 static void ipw_setup_hardware(struct ipw_hardware *hw)
 521 {
 522         unsigned long flags;
 523
 524         spin_lock_irqsave(&hw->lock, flags);
 525         if (hw->hw_version == HW_VERSION_1) {
 526                 /* Reset RX FIFO */
 527                 outw(DCR_RXRESET, hw->base_port + IODCR);
 528                 /* SB: Reset TX FIFO */
 529                 outw(DCR_TXRESET, hw->base_port + IODCR);
 530
 531                 /* Enable TX and RX interrupts. */
 532                 outw(IER_TXENABLED | IER_RXENABLED, hw->base_port + IOIER);
 533         } else {
 534                 /*
 535                  * Set INTRACK bit (bit 0), which means we must explicitly
 536                  * acknowledge interrupts by clearing bit 2 of reg_config_and_status.
 537                  */
 538                 unsigned short csr = readw(&hw->memregs_CCR->reg_config_and_status);
 539
 540                 csr |= 1;
 541                 writew(csr, &hw->memregs_CCR->reg_config_and_status);
 542         }
 543         spin_unlock_irqrestore(&hw->lock, flags);
 544 }
 545
 546 /*
 547  * If 'packet' is NULL, then this function allocates a new packet, setting its
 548  * length to 0 and ensuring it has the specified minimum amount of free space.
 549  *
 550  * If 'packet' is not NULL, then this function enlarges it if it doesn't
 551  * have the specified minimum amount of free space.
 552  *
 553  */
 554 static struct ipw_rx_packet *pool_allocate(struct ipw_hardware *hw,
 555                                            struct ipw_rx_packet *packet,
 556                                            int minimum_free_space)
 557 {
 558
 559         if (!packet) {
 560                 unsigned long flags;
 561
 562                 spin_lock_irqsave(&hw->lock, flags);
 563                 if (!list_empty(&hw->rx_pool)) {
 564                         packet = list_first_entry(&hw->rx_pool,
 565                                         struct ipw_rx_packet, queue);
 566                         list_del(&packet->queue);
 567                         hw->rx_pool_size--;
 568                         spin_unlock_irqrestore(&hw->lock, flags);
 569                 } else {
 570                         static int min_capacity = 256;
 571                         int new_capacity;
 572
 573                         spin_unlock_irqrestore(&hw->lock, flags);
 574                         new_capacity =
 575                                 (minimum_free_space > min_capacity
 576                                  ? minimum_free_space
 577                                  : min_capacity);
 578                         packet = kmalloc(sizeof(struct ipw_rx_packet)
 579                                         + new_capacity, GFP_ATOMIC);
 580                         if (!packet)
 581                                 return NULL;
 582                         packet->capacity = new_capacity;
 583                 }
 584                 packet->length = 0;
 585         }
 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->lock, flags);
 662                         hw->rx_bytes_queued += packet->length;
 663                         spin_unlock_irqrestore(&hw->lock, 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->lock, 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->lock, 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->lock, 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->lock, 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->lock, 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->lock, 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 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 - longer than the MTU!\n", len);
 863                         outw(DCR_RXDONE | DCR_RXRESET, hw->base_port + IODCR);
 864                         return;
 865                 }
 866
 867                 for (i = 0; i < len; i += 2) {
 868                         __le16 raw_data = inw(hw->base_port + IODRR);
 869                         unsigned short data = le16_to_cpu(raw_data);
 870
 871                         pkt[i] = (unsigned char) data;
 872                         pkt[i + 1] = (unsigned char) (data >> 8);
 873                 }
 874         } else {
 875                 len = inw(hw->base_port);
 876                 if (len > hw->ll_mtu) {
 877                         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
 878                                ": received a packet of %u bytes - longer than the MTU!\n", len);
 879                         writew(MEMRX_PCINTACKK,
 880                                 &hw->memory_info_regs->memreg_pc_interrupt_ack);
 881                         return;
 882                 }
 883
 884                 for (i = 0; i < len; i += 2) {
 885                         __le16 raw_data = inw(hw->base_port);
 886                         unsigned short data = le16_to_cpu(raw_data);
 887
 888                         pkt[i] = (unsigned char) data;
 889                         pkt[i + 1] = (unsigned char) (data >> 8);
 890                 }
 891
 892                 while ((i & 3) != 2) {
 893                         inw(hw->base_port);
 894                         i += 2;
 895                 }
 896         }
 897
 898         acknowledge_data_read(hw);
 899
 900         swap_packet_bitfield_from_le(pkt);
 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 : NL_NUM_OF_PRIORITIES);
 920 }
 921
 922 /*
 923  * return 1 if something has been received from hw
 924  */
 925 static int get_packets_from_hw(struct ipw_hardware *hw)
 926 {
 927         int received = 0;
 928         unsigned long flags;
 929
 930         spin_lock_irqsave(&hw->lock, flags);
 931         while (hw->rx_ready && !hw->blocking_rx) {
 932                 received = 1;
 933                 hw->rx_ready--;
 934                 spin_unlock_irqrestore(&hw->lock, flags);
 935
 936                 do_receive_packet(hw);
 937
 938                 spin_lock_irqsave(&hw->lock, flags);
 939         }
 940         spin_unlock_irqrestore(&hw->lock, flags);
 941
 942         return received;
 943 }
 944
 945 /*
 946  * Send pending packet up to given priority, prioritize SETUP data until
 947  * hardware is fully setup.
 948  *
 949  * return 1 if more packets can be sent
 950  */
 951 static int send_pending_packet(struct ipw_hardware *hw, int priority_limit)
 952 {
 953         int more_to_send = 0;
 954         unsigned long flags;
 955
 956         spin_lock_irqsave(&hw->lock, flags);
 957         if (hw->tx_queued && hw->tx_ready) {
 958                 int priority;
 959                 struct ipw_tx_packet *packet = NULL;
 960
 961                 /* Pick a packet */
 962                 for (priority = 0; priority < priority_limit; priority++) {
 963                         if (!list_empty(&hw->tx_queue[priority])) {
 964                                 packet = list_first_entry(
 965                                                 &hw->tx_queue[priority],
 966                                                 struct ipw_tx_packet,
 967                                                 queue);
 968
 969                                 hw->tx_queued--;
 970                                 list_del(&packet->queue);
 971
 972                                 break;
 973                         }
 974                 }
 975                 if (!packet) {
 976                         hw->tx_queued = 0;
 977                         spin_unlock_irqrestore(&hw->lock, flags);
 978                         return 0;
 979                 }
 980
 981                 spin_unlock_irqrestore(&hw->lock, flags);
 982
 983                 /* Send */
 984                 do_send_packet(hw, packet);
 985
 986                 /* Check if more to send */
 987                 spin_lock_irqsave(&hw->lock, flags);
 988                 for (priority = 0; priority < priority_limit; priority++)
 989                         if (!list_empty(&hw->tx_queue[priority])) {
 990                                 more_to_send = 1;
 991                                 break;
 992                         }
 993
 994                 if (!more_to_send)
 995                         hw->tx_queued = 0;
 996         }
 997         spin_unlock_irqrestore(&hw->lock, flags);
 998
 999         return more_to_send;
1000 }
1001
1002 /*
1003  * Send and receive all queued packets.
1004  */
1005 static void ipwireless_do_tasklet(unsigned long hw_)
1006 {
1007         struct ipw_hardware *hw = (struct ipw_hardware *) hw_;
1008         unsigned long flags;
1009
1010         spin_lock_irqsave(&hw->lock, flags);
1011         if (hw->shutting_down) {
1012                 spin_unlock_irqrestore(&hw->lock, flags);
1013                 return;
1014         }
1015
1016         if (hw->to_setup == 1) {
1017                 /*
1018                  * Initial setup data sent to hardware
1019                  */
1020                 hw->to_setup = 2;
1021                 spin_unlock_irqrestore(&hw->lock, flags);
1022
1023                 ipw_setup_hardware(hw);
1024                 ipw_send_setup_packet(hw);
1025
1026                 send_pending_packet(hw, PRIO_SETUP + 1);
1027                 get_packets_from_hw(hw);
1028         } else {
1029                 int priority_limit = get_current_packet_priority(hw);
1030                 int again;
1031
1032                 spin_unlock_irqrestore(&hw->lock, flags);
1033
1034                 do {
1035                         again = send_pending_packet(hw, priority_limit);
1036                         again |= get_packets_from_hw(hw);
1037                 } while (again);
1038         }
1039 }
1040
1041 /*
1042  * return true if the card is physically present.
1043  */
1044 static int is_card_present(struct ipw_hardware *hw)
1045 {
1046         if (hw->hw_version == HW_VERSION_1)
1047                 return inw(hw->base_port + IOIR) != 0xFFFF;
1048         else
1049                 return readl(&hw->memory_info_regs->memreg_card_present) ==
1050                     CARD_PRESENT_VALUE;
1051 }
1052
1053 static irqreturn_t ipwireless_handle_v1_interrupt(int irq,
1054                                                   struct ipw_hardware *hw)
1055 {
1056         unsigned short irqn;
1057
1058         irqn = inw(hw->base_port + IOIR);
1059
1060         /* Check if card is present */
1061         if (irqn == 0xFFFF)
1062                 return IRQ_NONE;
1063         else if (irqn != 0) {
1064                 unsigned short ack = 0;
1065                 unsigned long flags;
1066
1067                 /* Transmit complete. */
1068                 if (irqn & IR_TXINTR) {
1069                         ack |= IR_TXINTR;
1070                         spin_lock_irqsave(&hw->lock, flags);
1071                         hw->tx_ready = 1;
1072                         spin_unlock_irqrestore(&hw->lock, flags);
1073                 }
1074                 /* Received data */
1075                 if (irqn & IR_RXINTR) {
1076                         ack |= IR_RXINTR;
1077                         spin_lock_irqsave(&hw->lock, flags);
1078                         hw->rx_ready++;
1079                         spin_unlock_irqrestore(&hw->lock, flags);
1080                 }
1081                 if (ack != 0) {
1082                         outw(ack, hw->base_port + IOIR);
1083                         tasklet_schedule(&hw->tasklet);
1084                 }
1085                 return IRQ_HANDLED;
1086         }
1087         return IRQ_NONE;
1088 }
1089
1090 static void acknowledge_pcmcia_interrupt(struct ipw_hardware *hw)
1091 {
1092         unsigned short csr = readw(&hw->memregs_CCR->reg_config_and_status);
1093
1094         csr &= 0xfffd;
1095         writew(csr, &hw->memregs_CCR->reg_config_and_status);
1096 }
1097
1098 static irqreturn_t ipwireless_handle_v2_v3_interrupt(int irq,
1099                                                      struct ipw_hardware *hw)
1100 {
1101         int tx = 0;
1102         int rx = 0;
1103         int rx_repeat = 0;
1104         int try_mem_tx_old;
1105         unsigned long flags;
1106
1107         do {
1108
1109         unsigned short memtx = readw(hw->memreg_tx);
1110         unsigned short memtx_serial;
1111         unsigned short memrxdone =
1112                 readw(&hw->memory_info_regs->memreg_rx_done);
1113
1114         try_mem_tx_old = 0;
1115
1116         /* check whether the interrupt was generated by ipwireless card */
1117         if (!(memtx & MEMTX_TX) && !(memrxdone & MEMRX_RX_DONE)) {
1118
1119                 /* check if the card uses memreg_tx_old register */
1120                 if (hw->memreg_tx == &hw->memory_info_regs->memreg_tx_new) {
1121                         memtx = readw(&hw->memory_info_regs->memreg_tx_old);
1122                         if (memtx & MEMTX_TX) {
1123                                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
1124                                         ": Using memreg_tx_old\n");
1125                                 hw->memreg_tx =
1126                                         &hw->memory_info_regs->memreg_tx_old;
1127                         } else {
1128                                 return IRQ_NONE;
1129                         }
1130                 } else
1131                         return IRQ_NONE;
1132         }
1133
1134         /*
1135          * See if the card is physically present. Note that while it is
1136          * powering up, it appears not to be present.
1137          */
1138         if (!is_card_present(hw)) {
1139                 acknowledge_pcmcia_interrupt(hw);
1140                 return IRQ_HANDLED;
1141         }
1142
1143         memtx_serial = memtx & (unsigned short) 0xff00;
1144         if (memtx & MEMTX_TX) {
1145                 writew(memtx_serial, hw->memreg_tx);
1146
1147                 if (hw->serial_number_detected) {
1148                         if (memtx_serial != hw->last_memtx_serial) {
1149                                 hw->last_memtx_serial = memtx_serial;
1150                                 spin_lock_irqsave(&hw->lock, flags);
1151                                 hw->rx_ready++;
1152                                 spin_unlock_irqrestore(&hw->lock, flags);
1153                                 rx = 1;
1154                         } else
1155                                 /* Ignore 'Timer Recovery' duplicates. */
1156                                 rx_repeat = 1;
1157                 } else {
1158                         /*
1159                          * If a non-zero serial number is seen, then enable
1160                          * serial number checking.
1161                          */
1162                         if (memtx_serial != 0) {
1163                                 hw->serial_number_detected = 1;
1164                                 printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME
1165                                         ": memreg_tx serial num detected\n");
1166
1167                                 spin_lock_irqsave(&hw->lock, flags);
1168                                 hw->rx_ready++;
1169                                 spin_unlock_irqrestore(&hw->lock, flags);
1170                         }
1171                         rx = 1;
1172                 }
1173         }
1174         if (memrxdone & MEMRX_RX_DONE) {
1175                 writew(0, &hw->memory_info_regs->memreg_rx_done);
1176                 spin_lock_irqsave(&hw->lock, flags);
1177                 hw->tx_ready = 1;
1178                 spin_unlock_irqrestore(&hw->lock, flags);
1179                 tx = 1;
1180         }
1181         if (tx)
1182                 writew(MEMRX_PCINTACKK,
1183                                 &hw->memory_info_regs->memreg_pc_interrupt_ack);
1184
1185         acknowledge_pcmcia_interrupt(hw);
1186
1187         if (tx || rx)
1188                 tasklet_schedule(&hw->tasklet);
1189         else if (!rx_repeat) {
1190                 if (hw->memreg_tx == &hw->memory_info_regs->memreg_tx_new) {
1191                         if (hw->serial_number_detected)
1192                                 printk(KERN_WARNING IPWIRELESS_PCCARD_NAME
1193                                         ": spurious interrupt - new_tx mode\n");
1194                         else {
1195                                 printk(KERN_WARNING IPWIRELESS_PCCARD_NAME
1196                                         ": no valid memreg_tx value - switching to the old memreg_tx\n");
1197                                 hw->memreg_tx =
1198                                         &hw->memory_info_regs->memreg_tx_old;
1199                                 try_mem_tx_old = 1;
1200                         }
1201                 } else
1202                         printk(KERN_WARNING IPWIRELESS_PCCARD_NAME
1203                                         ": spurious interrupt - old_tx mode\n");
1204         }
1205
1206         } while (try_mem_tx_old == 1);
1207
1208         return IRQ_HANDLED;
1209 }
1210
1211 irqreturn_t ipwireless_interrupt(int irq, void *dev_id)
1212 {
1213         struct ipw_hardware *hw = dev_id;
1214
1215         if (hw->hw_version == HW_VERSION_1)
1216                 return ipwireless_handle_v1_interrupt(irq, hw);
1217         else
1218                 return ipwireless_handle_v2_v3_interrupt(irq, hw);
1219 }
1220
1221 static void flush_packets_to_hw(struct ipw_hardware *hw)
1222 {
1223         int priority_limit;
1224         unsigned long flags;
1225
1226         spin_lock_irqsave(&hw->lock, flags);
1227         priority_limit = get_current_packet_priority(hw);
1228         spin_unlock_irqrestore(&hw->lock, flags);
1229
1230         while (send_pending_packet(hw, priority_limit));
1231 }
1232
1233 static void send_packet(struct ipw_hardware *hw, int priority,
1234                         struct ipw_tx_packet *packet)
1235 {
1236         unsigned long flags;
1237
1238         spin_lock_irqsave(&hw->lock, flags);
1239         list_add_tail(&packet->queue, &hw->tx_queue[priority]);
1240         hw->tx_queued++;
1241         spin_unlock_irqrestore(&hw->lock, flags);
1242
1243         flush_packets_to_hw(hw);
1244 }
1245
1246 /* Create data packet, non-atomic allocation */
1247 static void *alloc_data_packet(int data_size,
1248                                 unsigned char dest_addr,
1249                                 unsigned char protocol)
1250 {
1251         struct ipw_tx_packet *packet = kzalloc(
1252                         sizeof(struct ipw_tx_packet) + data_size,
1253                         GFP_ATOMIC);
1254
1255         if (!packet)
1256                 return NULL;
1257
1258         INIT_LIST_HEAD(&packet->queue);
1259         packet->dest_addr = dest_addr;
1260         packet->protocol = protocol;
1261         packet->length = data_size;
1262
1263         return packet;
1264 }
1265
1266 static void *alloc_ctrl_packet(int header_size,
1267                                unsigned char dest_addr,
1268                                unsigned char protocol,
1269                                unsigned char sig_no)
1270 {
1271         /*
1272          * sig_no is located right after ipw_tx_packet struct in every
1273          * CTRL or SETUP packets, we can use ipw_control_packet as a
1274          * common struct
1275          */
1276         struct ipw_control_packet *packet = kzalloc(header_size, GFP_ATOMIC);
1277
1278         if (!packet)
1279                 return NULL;
1280
1281         INIT_LIST_HEAD(&packet->header.queue);
1282         packet->header.dest_addr = dest_addr;
1283         packet->header.protocol = protocol;
1284         packet->header.length = header_size - sizeof(struct ipw_tx_packet);
1285         packet->body.sig_no = sig_no;
1286
1287         return packet;
1288 }
1289
1290 int ipwireless_send_packet(struct ipw_hardware *hw, unsigned int channel_idx,
1291                             unsigned char *data, unsigned int length,
1292                             void (*callback) (void *cb, unsigned int length),
1293                             void *callback_data)
1294 {
1295         struct ipw_tx_packet *packet;
1296
1297         packet = alloc_data_packet(length, (channel_idx + 1),
1298                         TL_PROTOCOLID_COM_DATA);
1299         if (!packet)
1300                 return -ENOMEM;
1301         packet->packet_callback = callback;
1302         packet->callback_data = callback_data;
1303         memcpy((unsigned char *) packet + sizeof(struct ipw_tx_packet), data,
1304                         length);
1305
1306         send_packet(hw, PRIO_DATA, packet);
1307         return 0;
1308 }
1309
1310 static int set_control_line(struct ipw_hardware *hw, int prio,
1311                            unsigned int channel_idx, int line, int state)
1312 {
1313         struct ipw_control_packet *packet;
1314         int protocolid = TL_PROTOCOLID_COM_CTRL;
1315
1316         if (prio == PRIO_SETUP)
1317                 protocolid = TL_PROTOCOLID_SETUP;
1318
1319         packet = alloc_ctrl_packet(sizeof(struct ipw_control_packet),
1320                         (channel_idx + 1), protocolid, line);
1321         if (!packet)
1322                 return -ENOMEM;
1323         packet->header.length = sizeof(struct ipw_control_packet_body);
1324         packet->body.value = (state == 0 ? 0 : 1);
1325         send_packet(hw, prio, &packet->header);
1326         return 0;
1327 }
1328
1329
1330 static int set_DTR(struct ipw_hardware *hw, int priority,
1331                    unsigned int channel_idx, int state)
1332 {
1333         if (state != 0)
1334                 hw->control_lines[channel_idx] |= IPW_CONTROL_LINE_DTR;
1335         else
1336                 hw->control_lines[channel_idx] &= ~IPW_CONTROL_LINE_DTR;
1337
1338         return set_control_line(hw, priority, channel_idx, COMCTRL_DTR, state);
1339 }
1340
1341 static int set_RTS(struct ipw_hardware *hw, int priority,
1342                    unsigned int channel_idx, int state)
1343 {
1344         if (state != 0)
1345                 hw->control_lines[channel_idx] |= IPW_CONTROL_LINE_RTS;
1346         else
1347                 hw->control_lines[channel_idx] &= ~IPW_CONTROL_LINE_RTS;
1348
1349         return set_control_line(hw, priority, channel_idx, COMCTRL_RTS, state);
1350 }
1351
1352 int ipwireless_set_DTR(struct ipw_hardware *hw, unsigned int channel_idx,
1353                        int state)
1354 {
1355         return set_DTR(hw, PRIO_CTRL, channel_idx, state);
1356 }
1357
1358 int ipwireless_set_RTS(struct ipw_hardware *hw, unsigned int channel_idx,
1359                        int state)
1360 {
1361         return set_RTS(hw, PRIO_CTRL, channel_idx, state);
1362 }
1363
1364 struct ipw_setup_get_version_query_packet {
1365         struct ipw_tx_packet header;
1366         struct tl_setup_get_version_qry body;
1367 };
1368
1369 struct ipw_setup_config_packet {
1370         struct ipw_tx_packet header;
1371         struct tl_setup_config_msg body;
1372 };
1373
1374 struct ipw_setup_config_done_packet {
1375         struct ipw_tx_packet header;
1376         struct tl_setup_config_done_msg body;
1377 };
1378
1379 struct ipw_setup_open_packet {
1380         struct ipw_tx_packet header;
1381         struct tl_setup_open_msg body;
1382 };
1383
1384 struct ipw_setup_info_packet {
1385         struct ipw_tx_packet header;
1386         struct tl_setup_info_msg body;
1387 };
1388
1389 struct ipw_setup_reboot_msg_ack {
1390         struct ipw_tx_packet header;
1391         struct TlSetupRebootMsgAck body;
1392 };
1393
1394 /* This handles the actual initialization of the card */
1395 static void __handle_setup_get_version_rsp(struct ipw_hardware *hw)
1396 {
1397         struct ipw_setup_config_packet *config_packet;
1398         struct ipw_setup_config_done_packet *config_done_packet;
1399         struct ipw_setup_open_packet *open_packet;
1400         struct ipw_setup_info_packet *info_packet;
1401         int port;
1402         unsigned int channel_idx;
1403
1404         /* generate config packet */
1405         for (port = 1; port <= NL_NUM_OF_ADDRESSES; port++) {
1406                 config_packet = alloc_ctrl_packet(
1407                                 sizeof(struct ipw_setup_config_packet),
1408                                 ADDR_SETUP_PROT,
1409                                 TL_PROTOCOLID_SETUP,
1410                                 TL_SETUP_SIGNO_CONFIG_MSG);
1411                 if (!config_packet)
1412                         goto exit_nomem;
1413                 config_packet->header.length = sizeof(struct tl_setup_config_msg);
1414                 config_packet->body.port_no = port;
1415                 config_packet->body.prio_data = PRIO_DATA;
1416                 config_packet->body.prio_ctrl = PRIO_CTRL;
1417                 send_packet(hw, PRIO_SETUP, &config_packet->header);
1418         }
1419         config_done_packet = alloc_ctrl_packet(
1420                         sizeof(struct ipw_setup_config_done_packet),
1421                         ADDR_SETUP_PROT,
1422                         TL_PROTOCOLID_SETUP,
1423                         TL_SETUP_SIGNO_CONFIG_DONE_MSG);
1424         if (!config_done_packet)
1425                 goto exit_nomem;
1426         config_done_packet->header.length = sizeof(struct tl_setup_config_done_msg);
1427         send_packet(hw, PRIO_SETUP, &config_done_packet->header);
1428
1429         /* generate open packet */
1430         for (port = 1; port <= NL_NUM_OF_ADDRESSES; port++) {
1431                 open_packet = alloc_ctrl_packet(
1432                                 sizeof(struct ipw_setup_open_packet),
1433                                 ADDR_SETUP_PROT,
1434                                 TL_PROTOCOLID_SETUP,
1435                                 TL_SETUP_SIGNO_OPEN_MSG);
1436                 if (!open_packet)
1437                         goto exit_nomem;
1438                 open_packet->header.length = sizeof(struct tl_setup_open_msg);
1439                 open_packet->body.port_no = port;
1440                 send_packet(hw, PRIO_SETUP, &open_packet->header);
1441         }
1442         for (channel_idx = 0;
1443                         channel_idx < NL_NUM_OF_ADDRESSES; channel_idx++) {
1444                 int ret;
1445
1446                 ret = set_DTR(hw, PRIO_SETUP, channel_idx,
1447                         (hw->control_lines[channel_idx] &
1448                          IPW_CONTROL_LINE_DTR) != 0);
1449                 if (ret) {
1450                         printk(KERN_ERR IPWIRELESS_PCCARD_NAME
1451                                         ": error setting DTR (%d)\n", ret);
1452                         return;
1453                 }
1454
1455                 set_RTS(hw, PRIO_SETUP, channel_idx,
1456                         (hw->control_lines [channel_idx] &
1457                          IPW_CONTROL_LINE_RTS) != 0);
1458                 if (ret) {
1459                         printk(KERN_ERR IPWIRELESS_PCCARD_NAME
1460                                         ": error setting RTS (%d)\n", ret);
1461                         return;
1462                 }
1463         }
1464         /*
1465          * For NDIS we assume that we are using sync PPP frames, for COM async.
1466          * This driver uses NDIS mode too. We don't bother with translation
1467          * from async -> sync PPP.
1468          */
1469         info_packet = alloc_ctrl_packet(sizeof(struct ipw_setup_info_packet),
1470                         ADDR_SETUP_PROT,
1471                         TL_PROTOCOLID_SETUP,
1472                         TL_SETUP_SIGNO_INFO_MSG);
1473         if (!info_packet)
1474                 goto exit_nomem;
1475         info_packet->header.length = sizeof(struct tl_setup_info_msg);
1476         info_packet->body.driver_type = NDISWAN_DRIVER;
1477         info_packet->body.major_version = NDISWAN_DRIVER_MAJOR_VERSION;
1478         info_packet->body.minor_version = NDISWAN_DRIVER_MINOR_VERSION;
1479         send_packet(hw, PRIO_SETUP, &info_packet->header);
1480
1481         /* Initialization is now complete, so we clear the 'to_setup' flag */
1482         hw->to_setup = 0;
1483
1484         return;
1485
1486 exit_nomem:
1487         printk(KERN_ERR IPWIRELESS_PCCARD_NAME
1488                         ": not enough memory to alloc control packet\n");
1489         hw->to_setup = -1;
1490 }
1491
1492 static void handle_setup_get_version_rsp(struct ipw_hardware *hw,
1493                 unsigned char vers_no)
1494 {
1495         del_timer(&hw->setup_timer);
1496         hw->initializing = 0;
1497         printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": card is ready.\n");
1498
1499         if (vers_no == TL_SETUP_VERSION)
1500                 __handle_setup_get_version_rsp(hw);
1501         else
1502                 printk(KERN_ERR IPWIRELESS_PCCARD_NAME
1503                                 ": invalid hardware version no %u\n",
1504                                 (unsigned int) vers_no);
1505 }
1506
1507 static void ipw_send_setup_packet(struct ipw_hardware *hw)
1508 {
1509         struct ipw_setup_get_version_query_packet *ver_packet;
1510
1511         ver_packet = alloc_ctrl_packet(
1512                         sizeof(struct ipw_setup_get_version_query_packet),
1513                         ADDR_SETUP_PROT, TL_PROTOCOLID_SETUP,
1514                         TL_SETUP_SIGNO_GET_VERSION_QRY);
1515         ver_packet->header.length = sizeof(struct tl_setup_get_version_qry);
1516
1517         /*
1518          * Response is handled in handle_received_SETUP_packet
1519          */
1520         send_packet(hw, PRIO_SETUP, &ver_packet->header);
1521 }
1522
1523 static void handle_received_SETUP_packet(struct ipw_hardware *hw,
1524                                          unsigned int address,
1525                                          unsigned char *data, int len,
1526                                          int is_last)
1527 {
1528         union ipw_setup_rx_msg *rx_msg = (union ipw_setup_rx_msg *) data;
1529
1530         if (address != ADDR_SETUP_PROT) {
1531                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
1532                        ": setup packet has bad address %d\n", address);
1533                 return;
1534         }
1535
1536         switch (rx_msg->sig_no) {
1537         case TL_SETUP_SIGNO_GET_VERSION_RSP:
1538                 if (hw->to_setup)
1539                         handle_setup_get_version_rsp(hw,
1540                                         rx_msg->version_rsp_msg.version);
1541                 break;
1542
1543         case TL_SETUP_SIGNO_OPEN_MSG:
1544                 if (ipwireless_debug) {
1545                         unsigned int channel_idx = rx_msg->open_msg.port_no - 1;
1546
1547                         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
1548                                ": OPEN_MSG [channel %u] reply received\n",
1549                                channel_idx);
1550                 }
1551                 break;
1552
1553         case TL_SETUP_SIGNO_INFO_MSG_ACK:
1554                 if (ipwireless_debug)
1555                         printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME
1556                                ": card successfully configured as NDISWAN\n");
1557                 break;
1558
1559         case TL_SETUP_SIGNO_REBOOT_MSG:
1560                 if (hw->to_setup)
1561                         printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME
1562                                ": Setup not completed - ignoring reboot msg\n");
1563                 else {
1564                         struct ipw_setup_reboot_msg_ack *packet;
1565
1566                         printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME
1567                                ": Acknowledging REBOOT message\n");
1568                         packet = alloc_ctrl_packet(
1569                                         sizeof(struct ipw_setup_reboot_msg_ack),
1570                                         ADDR_SETUP_PROT, TL_PROTOCOLID_SETUP,
1571                                         TL_SETUP_SIGNO_REBOOT_MSG_ACK);
1572                         packet->header.length =
1573                                 sizeof(struct TlSetupRebootMsgAck);
1574                         send_packet(hw, PRIO_SETUP, &packet->header);
1575                         if (hw->reboot_callback)
1576                                 hw->reboot_callback(hw->reboot_callback_data);
1577                 }
1578                 break;
1579
1580         default:
1581                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
1582                        ": unknown setup message %u received\n",
1583                        (unsigned int) rx_msg->sig_no);
1584         }
1585 }
1586
1587 static void do_close_hardware(struct ipw_hardware *hw)
1588 {
1589         unsigned int irqn;
1590
1591         if (hw->hw_version == HW_VERSION_1) {
1592                 /* Disable TX and RX interrupts. */
1593                 outw(0, hw->base_port + IOIER);
1594
1595                 /* Acknowledge any outstanding interrupt requests */
1596                 irqn = inw(hw->base_port + IOIR);
1597                 if (irqn & IR_TXINTR)
1598                         outw(IR_TXINTR, hw->base_port + IOIR);
1599                 if (irqn & IR_RXINTR)
1600                         outw(IR_RXINTR, hw->base_port + IOIR);
1601
1602                 synchronize_irq(hw->irq);
1603         }
1604 }
1605
1606 struct ipw_hardware *ipwireless_hardware_create(void)
1607 {
1608         int i;
1609         struct ipw_hardware *hw =
1610                 kzalloc(sizeof(struct ipw_hardware), GFP_KERNEL);
1611
1612         if (!hw)
1613                 return NULL;
1614
1615         hw->irq = -1;
1616         hw->initializing = 1;
1617         hw->tx_ready = 1;
1618         hw->rx_bytes_queued = 0;
1619         hw->rx_pool_size = 0;
1620         hw->last_memtx_serial = (unsigned short) 0xffff;
1621         for (i = 0; i < NL_NUM_OF_PRIORITIES; i++)
1622                 INIT_LIST_HEAD(&hw->tx_queue[i]);
1623
1624         INIT_LIST_HEAD(&hw->rx_queue);
1625         INIT_LIST_HEAD(&hw->rx_pool);
1626         spin_lock_init(&hw->lock);
1627         tasklet_init(&hw->tasklet, ipwireless_do_tasklet, (unsigned long) hw);
1628         INIT_WORK(&hw->work_rx, ipw_receive_data_work);
1629         setup_timer(&hw->setup_timer, ipwireless_setup_timer,
1630                         (unsigned long) hw);
1631
1632         return hw;
1633 }
1634
1635 void ipwireless_init_hardware_v1(struct ipw_hardware *hw,
1636                 unsigned int base_port,
1637                 void __iomem *attr_memory,
1638                 void __iomem *common_memory,
1639                 int is_v2_card,
1640                 void (*reboot_callback) (void *data),
1641                 void *reboot_callback_data)
1642 {
1643         if (hw->removed) {
1644                 hw->removed = 0;
1645                 enable_irq(hw->irq);
1646         }
1647         hw->base_port = base_port;
1648         hw->hw_version = (is_v2_card ? HW_VERSION_2 : HW_VERSION_1);
1649         hw->ll_mtu = (hw->hw_version == HW_VERSION_1 ? LL_MTU_V1 : LL_MTU_V2);
1650         hw->memregs_CCR = (struct MEMCCR __iomem *)
1651                         ((unsigned short __iomem *) attr_memory + 0x200);
1652         hw->memory_info_regs = (struct MEMINFREG __iomem *) common_memory;
1653         hw->memreg_tx = &hw->memory_info_regs->memreg_tx_new;
1654         hw->reboot_callback = reboot_callback;
1655         hw->reboot_callback_data = reboot_callback_data;
1656 }
1657
1658 void ipwireless_init_hardware_v2_v3(struct ipw_hardware *hw)
1659 {
1660         hw->initializing = 1;
1661         hw->init_loops = 0;
1662         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
1663                ": waiting for card to start up...\n");
1664         ipwireless_setup_timer((unsigned long) hw);
1665 }
1666
1667 static void ipwireless_setup_timer(unsigned long data)
1668 {
1669         struct ipw_hardware *hw = (struct ipw_hardware *) data;
1670
1671         hw->init_loops++;
1672
1673         if (hw->init_loops == TL_SETUP_MAX_VERSION_QRY &&
1674                         hw->hw_version == HW_VERSION_2 &&
1675                         hw->memreg_tx == &hw->memory_info_regs->memreg_tx_new) {
1676                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
1677                                 ": failed to startup using TX2, trying TX\n");
1678
1679                 hw->memreg_tx = &hw->memory_info_regs->memreg_tx_old;
1680                 hw->init_loops = 0;
1681         }
1682         /* Give up after a certain number of retries */
1683         if (hw->init_loops == TL_SETUP_MAX_VERSION_QRY) {
1684                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
1685                        ": card failed to start up!\n");
1686                 hw->initializing = 0;
1687         } else {
1688                 /* Do not attempt to write to the board if it is not present. */
1689                 if (is_card_present(hw)) {
1690                         unsigned long flags;
1691
1692                         spin_lock_irqsave(&hw->lock, flags);
1693                         hw->to_setup = 1;
1694                         hw->tx_ready = 1;
1695                         spin_unlock_irqrestore(&hw->lock, flags);
1696                         tasklet_schedule(&hw->tasklet);
1697                 }
1698
1699                 mod_timer(&hw->setup_timer,
1700                         jiffies + msecs_to_jiffies(TL_SETUP_VERSION_QRY_TMO));
1701         }
1702 }
1703
1704 /*
1705  * Stop any interrupts from executing so that, once this function returns,
1706  * other layers of the driver can be sure they won't get any more callbacks.
1707  * Thus must be called on a proper process context.
1708  */
1709 void ipwireless_stop_interrupts(struct ipw_hardware *hw)
1710 {
1711         if (!hw->shutting_down) {
1712                 /* Tell everyone we are going down. */
1713                 hw->shutting_down = 1;
1714                 del_timer(&hw->setup_timer);
1715
1716                 /* Prevent the hardware from sending any more interrupts */
1717                 do_close_hardware(hw);
1718         }
1719 }
1720
1721 void ipwireless_hardware_free(struct ipw_hardware *hw)
1722 {
1723         int i;
1724         struct ipw_rx_packet *rp, *rq;
1725         struct ipw_tx_packet *tp, *tq;
1726
1727         ipwireless_stop_interrupts(hw);
1728
1729         flush_scheduled_work();
1730
1731         for (i = 0; i < NL_NUM_OF_ADDRESSES; i++)
1732                 if (hw->packet_assembler[i] != NULL)
1733                         kfree(hw->packet_assembler[i]);
1734
1735         for (i = 0; i < NL_NUM_OF_PRIORITIES; i++)
1736                 list_for_each_entry_safe(tp, tq, &hw->tx_queue[i], queue) {
1737                         list_del(&tp->queue);
1738                         kfree(tp);
1739                 }
1740
1741         list_for_each_entry_safe(rp, rq, &hw->rx_queue, queue) {
1742                 list_del(&rp->queue);
1743                 kfree(rp);
1744         }
1745
1746         list_for_each_entry_safe(rp, rq, &hw->rx_pool, queue) {
1747                 list_del(&rp->queue);
1748                 kfree(rp);
1749         }
1750         kfree(hw);
1751 }
1752
1753 /*
1754  * Associate the specified network with this hardware, so it will receive events
1755  * from it.
1756  */
1757 void ipwireless_associate_network(struct ipw_hardware *hw,
1758                                   struct ipw_network *network)
1759 {
1760         hw->network = network;
1761 }