drivers/net/wireless/libertas/if_cs.c

   1 /*
   2
   3   Driver for the Marvell 8385 based compact flash WLAN cards.
   4
   5   (C) 2007 by Holger Schurig <hs4233@mail.mn-solutions.de>
   6
   7   This program is free software; you can redistribute it and/or modify
   8   it under the terms of the GNU General Public License as published by
   9   the Free Software Foundation; either version 2 of the License, or
  10   (at your option) any later version.
  11
  12   This program is distributed in the hope that it will be useful,
  13   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15   GNU General Public License for more details.
  16
  17   You should have received a copy of the GNU General Public License
  18   along with this program; see the file COPYING.  If not, write to
  19   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  20   Boston, MA 02110-1301, USA.
  21
  22 */
  23
  24 #include <linux/module.h>
  25 #include <linux/delay.h>
  26 #include <linux/moduleparam.h>
  27 #include <linux/firmware.h>
  28 #include <linux/netdevice.h>
  29
  30 #include <pcmcia/cs_types.h>
  31 #include <pcmcia/cs.h>
  32 #include <pcmcia/cistpl.h>
  33 #include <pcmcia/ds.h>
  34
  35 #include <linux/io.h>
  36
  37 #define DRV_NAME "libertas_cs"
  38
  39 #include "decl.h"
  40 #include "defs.h"
  41 #include "dev.h"
  42
  43
  44 /********************************************************************/
  45 /* Module stuff                                                     */
  46 /********************************************************************/
  47
  48 MODULE_AUTHOR("Holger Schurig <hs4233@mail.mn-solutions.de>");
  49 MODULE_DESCRIPTION("Driver for Marvell 83xx compact flash WLAN cards");
  50 MODULE_LICENSE("GPL");
  51
  52
  53
  54 /********************************************************************/
  55 /* Data structures                                                  */
  56 /********************************************************************/
  57
  58 struct if_cs_card {
  59         struct pcmcia_device *p_dev;
  60         wlan_private *priv;
  61         void __iomem *iobase;
  62 };
  63
  64
  65
  66 /********************************************************************/
  67 /* Hardware access                                                  */
  68 /********************************************************************/
  69
  70 /* This define enables wrapper functions which allow you
  71    to dump all register accesses. You normally won't this,
  72    except for development */
  73 /* #define DEBUG_IO */
  74
  75 #ifdef DEBUG_IO
  76 static int debug_output = 0;
  77 #else
  78 /* This way the compiler optimizes the printk's away */
  79 #define debug_output 0
  80 #endif
  81
  82 static inline unsigned int if_cs_read8(struct if_cs_card *card, uint reg)
  83 {
  84         unsigned int val = ioread8(card->iobase + reg);
  85         if (debug_output)
  86                 printk(KERN_INFO "##inb %08x<%02x\n", reg, val);
  87         return val;
  88 }
  89 static inline unsigned int if_cs_read16(struct if_cs_card *card, uint reg)
  90 {
  91         unsigned int val = ioread16(card->iobase + reg);
  92         if (debug_output)
  93                 printk(KERN_INFO "##inw %08x<%04x\n", reg, val);
  94         return val;
  95 }
  96 static inline void if_cs_read16_rep(
  97         struct if_cs_card *card,
  98         uint reg,
  99         void *buf,
 100         unsigned long count)
 101 {
 102         if (debug_output)
 103                 printk(KERN_INFO "##insw %08x<(0x%lx words)\n",
 104                         reg, count);
 105         ioread16_rep(card->iobase + reg, buf, count);
 106 }
 107
 108 static inline void if_cs_write8(struct if_cs_card *card, uint reg, u8 val)
 109 {
 110         if (debug_output)
 111                 printk(KERN_INFO "##outb %08x>%02x\n", reg, val);
 112         iowrite8(val, card->iobase + reg);
 113 }
 114
 115 static inline void if_cs_write16(struct if_cs_card *card, uint reg, u16 val)
 116 {
 117         if (debug_output)
 118                 printk(KERN_INFO "##outw %08x>%04x\n", reg, val);
 119         iowrite16(val, card->iobase + reg);
 120 }
 121
 122 static inline void if_cs_write16_rep(
 123         struct if_cs_card *card,
 124         uint reg,
 125         void *buf,
 126         unsigned long count)
 127 {
 128         if (debug_output)
 129                 printk(KERN_INFO "##outsw %08x>(0x%lx words)\n",
 130                         reg, count);
 131         iowrite16_rep(card->iobase + reg, buf, count);
 132 }
 133
 134
 135 /*
 136  * I know that polling/delaying is frowned upon. However, this procedure
 137  * with polling is needed while downloading the firmware. At this stage,
 138  * the hardware does unfortunately not create any interrupts.
 139  *
 140  * Fortunately, this function is never used once the firmware is in
 141  * the card. :-)
 142  *
 143  * As a reference, see the "Firmware Specification v5.1", page 18
 144  * and 19. I did not follow their suggested timing to the word,
 145  * but this works nice & fast anyway.
 146  */
 147 static int if_cs_poll_while_fw_download(struct if_cs_card *card, uint addr, u8 reg)
 148 {
 149         int i;
 150
 151         for (i = 0; i < 500; i++) {
 152                 u8 val = if_cs_read8(card, addr);
 153                 if (val == reg)
 154                         return i;
 155                 udelay(100);
 156         }
 157         return -ETIME;
 158 }
 159
 160
 161
 162 /* Host control registers and their bit definitions */
 163
 164 #define IF_CS_H_STATUS                  0x00000000
 165 #define IF_CS_H_STATUS_TX_OVER          0x0001
 166 #define IF_CS_H_STATUS_RX_OVER          0x0002
 167 #define IF_CS_H_STATUS_DNLD_OVER        0x0004
 168
 169 #define IF_CS_H_INT_CAUSE               0x00000002
 170 #define IF_CS_H_IC_TX_OVER              0x0001
 171 #define IF_CS_H_IC_RX_OVER              0x0002
 172 #define IF_CS_H_IC_DNLD_OVER            0x0004
 173 #define IF_CS_H_IC_HOST_EVENT           0x0008
 174 #define IF_CS_H_IC_MASK                 0x001f
 175
 176 #define IF_CS_H_INT_MASK                0x00000004
 177 #define IF_CS_H_IM_MASK                 0x001f
 178
 179 #define IF_CS_H_WRITE_LEN               0x00000014
 180
 181 #define IF_CS_H_WRITE                   0x00000016
 182
 183 #define IF_CS_H_CMD_LEN                 0x00000018
 184
 185 #define IF_CS_H_CMD                     0x0000001A
 186
 187 #define IF_CS_C_READ_LEN                0x00000024
 188
 189 #define IF_CS_H_READ                    0x00000010
 190
 191 /* Card control registers and their bit definitions */
 192
 193 #define IF_CS_C_STATUS                  0x00000020
 194 #define IF_CS_C_S_TX_DNLD_RDY           0x0001
 195 #define IF_CS_C_S_RX_UPLD_RDY           0x0002
 196 #define IF_CS_C_S_CMD_DNLD_RDY          0x0004
 197 #define IF_CS_C_S_CMD_UPLD_RDY          0x0008
 198 #define IF_CS_C_S_CARDEVENT             0x0010
 199 #define IF_CS_C_S_MASK                  0x001f
 200 #define IF_CS_C_S_STATUS_MASK           0x7f00
 201 /* The following definitions should be the same as the MRVDRV_ ones */
 202
 203 #if MRVDRV_CMD_DNLD_RDY != IF_CS_C_S_CMD_DNLD_RDY
 204 #error MRVDRV_CMD_DNLD_RDY and IF_CS_C_S_CMD_DNLD_RDY not in sync
 205 #endif
 206 #if MRVDRV_CMD_UPLD_RDY != IF_CS_C_S_CMD_UPLD_RDY
 207 #error MRVDRV_CMD_UPLD_RDY and IF_CS_C_S_CMD_UPLD_RDY not in sync
 208 #endif
 209 #if MRVDRV_CARDEVENT != IF_CS_C_S_CARDEVENT
 210 #error MRVDRV_CARDEVENT and IF_CS_C_S_CARDEVENT not in sync
 211 #endif
 212
 213 #define IF_CS_C_INT_CAUSE               0x00000022
 214 #define IF_CS_C_IC_MASK                 0x001f
 215
 216 #define IF_CS_C_SQ_READ_LOW             0x00000028
 217 #define IF_CS_C_SQ_HELPER_OK            0x10
 218
 219 #define IF_CS_C_CMD_LEN                 0x00000030
 220
 221 #define IF_CS_C_CMD                     0x00000012
 222
 223 #define IF_CS_SCRATCH                   0x0000003F
 224
 225
 226
 227 /********************************************************************/
 228 /* Interrupts                                                       */
 229 /********************************************************************/
 230
 231 static inline void if_cs_enable_ints(struct if_cs_card *card)
 232 {
 233         lbs_deb_enter(LBS_DEB_CS);
 234         if_cs_write16(card, IF_CS_H_INT_MASK, 0);
 235 }
 236
 237 static inline void if_cs_disable_ints(struct if_cs_card *card)
 238 {
 239         lbs_deb_enter(LBS_DEB_CS);
 240         if_cs_write16(card, IF_CS_H_INT_MASK, IF_CS_H_IM_MASK);
 241 }
 242
 243 static irqreturn_t if_cs_interrupt(int irq, void *data)
 244 {
 245         struct if_cs_card *card = (struct if_cs_card *)data;
 246         u16 int_cause;
 247
 248         lbs_deb_enter(LBS_DEB_CS);
 249
 250         int_cause = if_cs_read16(card, IF_CS_C_INT_CAUSE);
 251         switch (int_cause) {
 252         case 0x0000:
 253                 /* not for us */
 254                 return IRQ_NONE;
 255         case 0xffff:
 256                 /* if one reads junk, then probably the card was removed */
 257                 card->priv->adapter->surpriseremoved = 1;
 258                 break;
 259         case IF_CS_H_IC_TX_OVER:
 260                 if (card->priv->adapter->connect_status == LIBERTAS_CONNECTED)
 261                         netif_wake_queue(card->priv->dev);
 262                 /* fallthrought */
 263         default:
 264                 /* clear interrupt */
 265                 if_cs_write16(card, IF_CS_C_INT_CAUSE, int_cause & IF_CS_C_IC_MASK);
 266                 if_cs_disable_ints(card);
 267         }
 268
 269         libertas_interrupt(card->priv->dev);
 270
 271         return IRQ_HANDLED;
 272 }
 273
 274
 275
 276
 277 /********************************************************************/
 278 /* I/O                                                              */
 279 /********************************************************************/
 280
 281 /*
 282  * Called from if_cs_host_to_card to send a command to the hardware
 283  */
 284 static int if_cs_send_cmd(wlan_private *priv, u8 *buf, u16 nb)
 285 {
 286         struct if_cs_card *card = (struct if_cs_card *)priv->card;
 287         int ret = -1;
 288         int loops = 0;
 289
 290         lbs_deb_enter(LBS_DEB_CS);
 291
 292         /* Is hardware ready? */
 293         while (1) {
 294                 u16 val = if_cs_read16(card, IF_CS_C_STATUS);
 295                 if (val & IF_CS_C_S_CMD_DNLD_RDY)
 296                         break;
 297                 if (++loops > 100) {
 298                         lbs_pr_err("card not ready for commands\n");
 299                         goto done;
 300                 }
 301                 mdelay(1);
 302         }
 303
 304         if_cs_write16(card, IF_CS_H_CMD_LEN, nb);
 305
 306         if_cs_write16_rep(card, IF_CS_H_CMD, buf, nb / 2);
 307         /* Are we supposed to transfer an odd amount of bytes? */
 308         if (nb & 1)
 309                 if_cs_write8(card, IF_CS_H_CMD, buf[nb-1]);
 310
 311         /* "Assert the download over interrupt command in the Host
 312          * status register" */
 313         if_cs_write16(card, IF_CS_H_STATUS, IF_CS_H_STATUS_DNLD_OVER);
 314
 315         /* "Assert the download over interrupt command in the Card
 316          * interrupt case register" */
 317         if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_DNLD_OVER);
 318         ret = 0;
 319
 320 done:
 321         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
 322         return ret;
 323 }
 324
 325
 326 /*
 327  * Called from if_cs_host_to_card to send a data to the hardware
 328  */
 329 static void if_cs_send_data(wlan_private *priv, u8 *buf, u16 nb)
 330 {
 331         struct if_cs_card *card = (struct if_cs_card *)priv->card;
 332
 333         lbs_deb_enter(LBS_DEB_CS);
 334
 335         if_cs_write16(card, IF_CS_H_WRITE_LEN, nb);
 336
 337         /* write even number of bytes, then odd byte if necessary */
 338         if_cs_write16_rep(card, IF_CS_H_WRITE, buf, nb / 2);
 339         if (nb & 1)
 340                 if_cs_write8(card, IF_CS_H_WRITE, buf[nb-1]);
 341
 342         if_cs_write16(card, IF_CS_H_STATUS, IF_CS_H_STATUS_TX_OVER);
 343         if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_STATUS_TX_OVER);
 344
 345         lbs_deb_leave(LBS_DEB_CS);
 346 }
 347
 348
 349 /*
 350  * Get the command result out of the card.
 351  */
 352 static int if_cs_receive_cmdres(wlan_private *priv, u8* data, u32 *len)
 353 {
 354         int ret = -1;
 355         u16 val;
 356
 357         lbs_deb_enter(LBS_DEB_CS);
 358
 359         /* is hardware ready? */
 360         val = if_cs_read16(priv->card, IF_CS_C_STATUS);
 361         if ((val & IF_CS_C_S_CMD_UPLD_RDY) == 0) {
 362                 lbs_pr_err("card not ready for CMD\n");
 363                 goto out;
 364         }
 365
 366         *len = if_cs_read16(priv->card, IF_CS_C_CMD_LEN);
 367         if ((*len == 0) || (*len > MRVDRV_SIZE_OF_CMD_BUFFER)) {
 368                 lbs_pr_err("card cmd buffer has invalid # of bytes (%d)\n", *len);
 369                 goto out;
 370         }
 371
 372         /* read even number of bytes, then odd byte if necessary */
 373         if_cs_read16_rep(priv->card, IF_CS_C_CMD, data, *len/sizeof(u16));
 374         if (*len & 1)
 375                 data[*len-1] = if_cs_read8(priv->card, IF_CS_C_CMD);
 376
 377         ret = 0;
 378 out:
 379         lbs_deb_leave_args(LBS_DEB_CS, "ret %d, len %d", ret, *len);
 380         return ret;
 381 }
 382
 383
 384 static struct sk_buff *if_cs_receive_data(wlan_private *priv)
 385 {
 386         struct sk_buff *skb = NULL;
 387         u16 len;
 388         u8 *data;
 389
 390         lbs_deb_enter(LBS_DEB_CS);
 391
 392         len = if_cs_read16(priv->card, IF_CS_C_READ_LEN);
 393         if (len == 0 || len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
 394                 lbs_pr_err("card data buffer has invalid # of bytes (%d)\n", len);
 395                 priv->stats.rx_dropped++;
 396                 printk(KERN_INFO "##HS %s:%d TODO\n", __FUNCTION__, __LINE__);
 397                 goto dat_err;
 398         }
 399
 400         //TODO: skb = dev_alloc_skb(len+ETH_FRAME_LEN+MRVDRV_SNAP_HEADER_LEN+EXTRA_LEN);
 401         skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
 402         if (!skb)
 403                 goto out;
 404         data = skb_put(skb, len);
 405
 406         /* read even number of bytes, then odd byte if necessary */
 407         if_cs_read16_rep(priv->card, IF_CS_H_READ, data, len/sizeof(u16));
 408         if (len & 1)
 409                 data[len-1] = if_cs_read8(priv->card, IF_CS_H_READ);
 410
 411 dat_err:
 412         if_cs_write16(priv->card, IF_CS_H_STATUS, IF_CS_H_STATUS_RX_OVER);
 413         if_cs_write16(priv->card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_RX_OVER);
 414
 415 out:
 416         lbs_deb_leave_args(LBS_DEB_CS, "ret %p", skb);
 417         return skb;
 418 }
 419
 420
 421
 422 /********************************************************************/
 423 /* Firmware                                                         */
 424 /********************************************************************/
 425
 426 /*
 427  * Tries to program the helper firmware.
 428  *
 429  * Return 0 on success
 430  */
 431 static int if_cs_prog_helper(struct if_cs_card *card)
 432 {
 433         int ret = 0;
 434         int sent = 0;
 435         u8  scratch;
 436         const struct firmware *fw;
 437
 438         lbs_deb_enter(LBS_DEB_CS);
 439
 440         scratch = if_cs_read8(card, IF_CS_SCRATCH);
 441
 442         /* "If the value is 0x5a, the firmware is already
 443          * downloaded successfully"
 444          */
 445         if (scratch == 0x5a)
 446                 goto done;
 447
 448         /* "If the value is != 00, it is invalid value of register */
 449         if (scratch != 0x00) {
 450                 ret = -ENODEV;
 451                 goto done;
 452         }
 453
 454         /* TODO: make firmware file configurable */
 455         ret = request_firmware(&fw, "libertas_cs_helper.fw",
 456                 &handle_to_dev(card->p_dev));
 457         if (ret) {
 458                 lbs_pr_err("can't load helper firmware\n");
 459                 ret = -ENODEV;
 460                 goto done;
 461         }
 462         lbs_deb_cs("helper size %td\n", fw->size);
 463
 464         /* "Set the 5 bytes of the helper image to 0" */
 465         /* Not needed, this contains an ARM branch instruction */
 466
 467         for (;;) {
 468                 /* "the number of bytes to send is 256" */
 469                 int count = 256;
 470                 int remain = fw->size - sent;
 471
 472                 if (remain < count)
 473                         count = remain;
 474                 /* printk(KERN_INFO "//HS %d loading %d of %d bytes\n",
 475                         __LINE__, sent, fw->size); */
 476
 477                 /* "write the number of bytes to be sent to the I/O Command
 478                  * write length register" */
 479                 if_cs_write16(card, IF_CS_H_CMD_LEN, count);
 480
 481                 /* "write this to I/O Command port register as 16 bit writes */
 482                 if (count)
 483                         if_cs_write16_rep(card, IF_CS_H_CMD,
 484                                 &fw->data[sent],
 485                                 count >> 1);
 486
 487                 /* "Assert the download over interrupt command in the Host
 488                  * status register" */
 489                 if_cs_write8(card, IF_CS_H_STATUS, IF_CS_H_STATUS_DNLD_OVER);
 490
 491                 /* "Assert the download over interrupt command in the Card
 492                  * interrupt case register" */
 493                 if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_DNLD_OVER);
 494
 495                 /* "The host polls the Card Status register ... for 50 ms before
 496                    declaring a failure */
 497                 ret = if_cs_poll_while_fw_download(card, IF_CS_C_STATUS,
 498                         IF_CS_C_S_CMD_DNLD_RDY);
 499                 if (ret < 0) {
 500                         lbs_pr_err("can't download helper at 0x%x, ret %d\n",
 501                                 sent, ret);
 502                         goto done;
 503                 }
 504
 505                 if (count == 0)
 506                         break;
 507
 508                 sent += count;
 509         }
 510
 511         release_firmware(fw);
 512         ret = 0;
 513
 514 done:
 515         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
 516         return ret;
 517 }
 518
 519
 520 static int if_cs_prog_real(struct if_cs_card *card)
 521 {
 522         const struct firmware *fw;
 523         int ret = 0;
 524         int retry = 0;
 525         int len = 0;
 526         int sent;
 527
 528         lbs_deb_enter(LBS_DEB_CS);
 529
 530         /* TODO: make firmware file configurable */
 531         ret = request_firmware(&fw, "libertas_cs.fw",
 532                 &handle_to_dev(card->p_dev));
 533         if (ret) {
 534                 lbs_pr_err("can't load firmware\n");
 535                 ret = -ENODEV;
 536                 goto done;
 537         }
 538         lbs_deb_cs("fw size %td\n", fw->size);
 539
 540         ret = if_cs_poll_while_fw_download(card, IF_CS_C_SQ_READ_LOW, IF_CS_C_SQ_HELPER_OK);
 541         if (ret < 0) {
 542                 int i;
 543                 lbs_pr_err("helper firmware doesn't answer\n");
 544                 for (i = 0; i < 0x50; i += 2)
 545                         printk(KERN_INFO "## HS %02x: %04x\n",
 546                                 i, if_cs_read16(card, i));
 547                 goto err_release;
 548         }
 549
 550         for (sent = 0; sent < fw->size; sent += len) {
 551                 len = if_cs_read16(card, IF_CS_C_SQ_READ_LOW);
 552                 /* printk(KERN_INFO "//HS %d loading %d of %d bytes\n",
 553                         __LINE__, sent, fw->size); */
 554                 if (len & 1) {
 555                         retry++;
 556                         lbs_pr_info("odd, need to retry this firmware block\n");
 557                 } else {
 558                         retry = 0;
 559                 }
 560
 561                 if (retry > 20) {
 562                         lbs_pr_err("could not download firmware\n");
 563                         ret = -ENODEV;
 564                         goto err_release;
 565                 }
 566                 if (retry) {
 567                         sent -= len;
 568                 }
 569
 570
 571                 if_cs_write16(card, IF_CS_H_CMD_LEN, len);
 572
 573                 if_cs_write16_rep(card, IF_CS_H_CMD,
 574                         &fw->data[sent],
 575                         (len+1) >> 1);
 576                 if_cs_write8(card, IF_CS_H_STATUS, IF_CS_H_STATUS_DNLD_OVER);
 577                 if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_DNLD_OVER);
 578
 579                 ret = if_cs_poll_while_fw_download(card, IF_CS_C_STATUS,
 580                         IF_CS_C_S_CMD_DNLD_RDY);
 581                 if (ret < 0) {
 582                         lbs_pr_err("can't download firmware at 0x%x\n", sent);
 583                         goto err_release;
 584                 }
 585         }
 586
 587         ret = if_cs_poll_while_fw_download(card, IF_CS_SCRATCH, 0x5a);
 588         if (ret < 0) {
 589                 lbs_pr_err("firmware download failed\n");
 590                 goto err_release;
 591         }
 592
 593         ret = 0;
 594         goto done;
 595
 596
 597 err_release:
 598         release_firmware(fw);
 599
 600 done:
 601         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
 602         return ret;
 603 }
 604
 605
 606
 607 /********************************************************************/
 608 /* Callback functions for libertas.ko                               */
 609 /********************************************************************/
 610
 611 /* Send commands or data packets to the card */
 612 static int if_cs_host_to_card(wlan_private *priv, u8 type, u8 *buf, u16 nb)
 613 {
 614         int ret = -1;
 615
 616         lbs_deb_enter_args(LBS_DEB_CS, "type %d, bytes %d", type, nb);
 617
 618         switch (type) {
 619         case MVMS_DAT:
 620                 priv->dnld_sent = DNLD_CMD_SENT;
 621                 if_cs_send_data(priv, buf, nb);
 622                 ret = 0;
 623                 break;
 624         case MVMS_CMD:
 625                 ret = if_cs_send_cmd(priv, buf, nb);
 626                 break;
 627         default:
 628                 lbs_pr_err("%s: unsupported type %d\n", __FUNCTION__, type);
 629         }
 630
 631         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
 632         return ret;
 633 }
 634
 635
 636 static int if_cs_get_int_status(wlan_private *priv, u8 *ireg)
 637 {
 638         struct if_cs_card *card = (struct if_cs_card *)priv->card;
 639         //wlan_adapter *adapter = priv->adapter;
 640         int ret = 0;
 641         u16 int_cause;
 642         u8 *cmdbuf;
 643         *ireg = 0;
 644
 645         lbs_deb_enter(LBS_DEB_CS);
 646
 647         if (priv->adapter->surpriseremoved)
 648                 goto out;
 649
 650         int_cause = if_cs_read16(card, IF_CS_C_INT_CAUSE) & IF_CS_C_IC_MASK;
 651         if_cs_write16(card, IF_CS_C_INT_CAUSE, int_cause);
 652
 653         *ireg = if_cs_read16(card, IF_CS_C_STATUS) & IF_CS_C_S_MASK;
 654         if_cs_enable_ints(card);
 655
 656         if (!*ireg)
 657                 goto sbi_get_int_status_exit;
 658
 659 sbi_get_int_status_exit:
 660
 661         /* is there a data packet for us? */
 662         if (*ireg & IF_CS_C_S_RX_UPLD_RDY) {
 663                 struct sk_buff *skb = if_cs_receive_data(priv);
 664                 libertas_process_rxed_packet(priv, skb);
 665                 *ireg &= ~IF_CS_C_S_RX_UPLD_RDY;
 666         }
 667
 668         if (*ireg & IF_CS_C_S_TX_DNLD_RDY) {
 669                 priv->dnld_sent = DNLD_RES_RECEIVED;
 670         }
 671
 672         /* Card has a command result for us */
 673         if (*ireg & IF_CS_C_S_CMD_UPLD_RDY) {
 674                 spin_lock(&priv->adapter->driver_lock);
 675                 if (!priv->adapter->cur_cmd) {
 676                         cmdbuf = priv->upld_buf;
 677                         priv->adapter->hisregcpy &= ~IF_CS_C_S_RX_UPLD_RDY;
 678                 } else {
 679                         cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;
 680                 }
 681
 682                 ret = if_cs_receive_cmdres(priv, cmdbuf, &priv->upld_len);
 683                 spin_unlock(&priv->adapter->driver_lock);
 684                 if (ret < 0)
 685                         lbs_pr_err("could not receive cmd from card\n");
 686         }
 687
 688 out:
 689         lbs_deb_leave_args(LBS_DEB_CS, "ret %d, ireg 0x%x, hisregcpy 0x%x", ret, *ireg, priv->adapter->hisregcpy);
 690         return ret;
 691 }
 692
 693
 694 static int if_cs_read_event_cause(wlan_private *priv)
 695 {
 696         lbs_deb_enter(LBS_DEB_CS);
 697
 698         priv->adapter->eventcause = (if_cs_read16(priv->card, IF_CS_C_STATUS) & IF_CS_C_S_STATUS_MASK) >> 5;
 699         if_cs_write16(priv->card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_HOST_EVENT);
 700
 701         return 0;
 702 }
 703
 704
 705
 706 /********************************************************************/
 707 /* Card Services                                                    */
 708 /********************************************************************/
 709
 710 /*
 711  * After a card is removed, if_cs_release() will unregister the
 712  * device, and release the PCMCIA configuration.  If the device is
 713  * still open, this will be postponed until it is closed.
 714  */
 715 static void if_cs_release(struct pcmcia_device *p_dev)
 716 {
 717         struct if_cs_card *card = p_dev->priv;
 718
 719         lbs_deb_enter(LBS_DEB_CS);
 720
 721         pcmcia_disable_device(p_dev);
 722         free_irq(p_dev->irq.AssignedIRQ, card);
 723         if (card->iobase)
 724                 ioport_unmap(card->iobase);
 725
 726         lbs_deb_leave(LBS_DEB_CS);
 727 }
 728
 729
 730 /*
 731  * This creates an "instance" of the driver, allocating local data
 732  * structures for one device.  The device is registered with Card
 733  * Services.
 734  *
 735  * The dev_link structure is initialized, but we don't actually
 736  * configure the card at this point -- we wait until we receive a card
 737  * insertion event.
 738  */
 739 static int if_cs_probe(struct pcmcia_device *p_dev)
 740 {
 741         int ret = -ENOMEM;
 742         wlan_private *priv;
 743         struct if_cs_card *card;
 744         /* CIS parsing */
 745         tuple_t tuple;
 746         cisparse_t parse;
 747         cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
 748         cistpl_io_t *io = &cfg->io;
 749         u_char buf[64];
 750
 751         lbs_deb_enter(LBS_DEB_CS);
 752
 753         card = kzalloc(sizeof(struct if_cs_card), GFP_KERNEL);
 754         if (!card) {
 755                 lbs_pr_err("error in kzalloc\n");
 756                 goto out;
 757         }
 758         card->p_dev = p_dev;
 759         p_dev->priv = card;
 760
 761         p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
 762         p_dev->irq.Handler = NULL;
 763         p_dev->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_LEVEL_ID;
 764
 765         p_dev->conf.Attributes = 0;
 766         p_dev->conf.IntType = INT_MEMORY_AND_IO;
 767
 768         tuple.Attributes = 0;
 769         tuple.TupleData = buf;
 770         tuple.TupleDataMax = sizeof(buf);
 771         tuple.TupleOffset = 0;
 772
 773         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 774         if ((ret = pcmcia_get_first_tuple(p_dev, &tuple)) != 0 ||
 775             (ret = pcmcia_get_tuple_data(p_dev, &tuple)) != 0 ||
 776             (ret = pcmcia_parse_tuple(p_dev, &tuple, &parse)) != 0)
 777         {
 778                 lbs_pr_err("error in pcmcia_get_first_tuple etc\n");
 779                 goto out1;
 780         }
 781
 782         p_dev->conf.ConfigIndex = cfg->index;
 783
 784         /* Do we need to allocate an interrupt? */
 785         if (cfg->irq.IRQInfo1) {
 786                 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
 787         }
 788
 789         /* IO window settings */
 790         if (cfg->io.nwin != 1) {
 791                 lbs_pr_err("wrong CIS (check number of IO windows)\n");
 792                 ret = -ENODEV;
 793                 goto out1;
 794         }
 795         p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 796         p_dev->io.BasePort1 = io->win[0].base;
 797         p_dev->io.NumPorts1 = io->win[0].len;
 798
 799         /* This reserves IO space but doesn't actually enable it */
 800         ret = pcmcia_request_io(p_dev, &p_dev->io);
 801         if (ret) {
 802                 lbs_pr_err("error in pcmcia_request_io\n");
 803                 goto out1;
 804         }
 805
 806         /*
 807          * Allocate an interrupt line.  Note that this does not assign
 808          * a handler to the interrupt, unless the 'Handler' member of
 809          * the irq structure is initialized.
 810          */
 811         if (p_dev->conf.Attributes & CONF_ENABLE_IRQ) {
 812                 ret = pcmcia_request_irq(p_dev, &p_dev->irq);
 813                 if (ret) {
 814                         lbs_pr_err("error in pcmcia_request_irq\n");
 815                         goto out1;
 816                 }
 817         }
 818
 819         /* Initialize io access */
 820         card->iobase = ioport_map(p_dev->io.BasePort1, p_dev->io.NumPorts1);
 821         if (!card->iobase) {
 822                 lbs_pr_err("error in ioport_map\n");
 823                 ret = -EIO;
 824                 goto out1;
 825         }
 826
 827         /*
 828          * This actually configures the PCMCIA socket -- setting up
 829          * the I/O windows and the interrupt mapping, and putting the
 830          * card and host interface into "Memory and IO" mode.
 831          */
 832         ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
 833         if (ret) {
 834                 lbs_pr_err("error in pcmcia_request_configuration\n");
 835                 goto out2;
 836         }
 837
 838         /* Finally, report what we've done */
 839         lbs_deb_cs("irq %d, io 0x%04x-0x%04x\n",
 840                p_dev->irq.AssignedIRQ, p_dev->io.BasePort1,
 841                p_dev->io.BasePort1 + p_dev->io.NumPorts1 - 1);
 842
 843         if_cs_enable_ints(card);
 844
 845         /* Load the firmware early, before calling into libertas.ko */
 846         ret = if_cs_prog_helper(card);
 847         if (ret == 0)
 848                 ret = if_cs_prog_real(card);
 849         if (ret)
 850                 goto out2;
 851
 852         /* Make this card known to the libertas driver */
 853         priv = libertas_add_card(card, &p_dev->dev);
 854         if (!priv) {
 855                 ret = -ENOMEM;
 856                 goto out2;
 857         }
 858
 859         /* Store pointers to our call-back functions */
 860         card->priv = priv;
 861         priv->card = card;
 862         priv->hw_host_to_card     = if_cs_host_to_card;
 863         priv->hw_get_int_status   = if_cs_get_int_status;
 864         priv->hw_read_event_cause = if_cs_read_event_cause;
 865
 866         priv->adapter->fw_ready = 1;
 867
 868         /* Now actually get the IRQ */
 869         ret = request_irq(p_dev->irq.AssignedIRQ, if_cs_interrupt,
 870                 IRQF_SHARED, DRV_NAME, card);
 871         if (ret) {
 872                 lbs_pr_err("error in request_irq\n");
 873                 goto out3;
 874         }
 875
 876         /* And finally bring the card up */
 877         if (libertas_start_card(priv) != 0) {
 878                 lbs_pr_err("could not activate card\n");
 879                 goto out3;
 880         }
 881
 882         ret = 0;
 883         goto out;
 884
 885 out3:
 886         libertas_remove_card(priv);
 887 out2:
 888         ioport_unmap(card->iobase);
 889 out1:
 890         pcmcia_disable_device(p_dev);
 891 out:
 892         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
 893         return ret;
 894 }
 895
 896
 897 /*
 898  * This deletes a driver "instance".  The device is de-registered with
 899  * Card Services.  If it has been released, all local data structures
 900  * are freed.  Otherwise, the structures will be freed when the device
 901  * is released.
 902  */
 903 static void if_cs_detach(struct pcmcia_device *p_dev)
 904 {
 905         struct if_cs_card *card = p_dev->priv;
 906
 907         lbs_deb_enter(LBS_DEB_CS);
 908
 909         libertas_stop_card(card->priv);
 910         libertas_remove_card(card->priv);
 911         if_cs_release(p_dev);
 912         kfree(card);
 913
 914         lbs_deb_leave(LBS_DEB_CS);
 915 }
 916
 917
 918
 919 /********************************************************************/
 920 /* Module initialization                                            */
 921 /********************************************************************/
 922
 923 static struct pcmcia_device_id if_cs_ids[] = {
 924         PCMCIA_DEVICE_MANF_CARD(0x02df, 0x8103),
 925         PCMCIA_DEVICE_NULL,
 926 };
 927 MODULE_DEVICE_TABLE(pcmcia, if_cs_ids);
 928
 929
 930 static struct pcmcia_driver libertas_driver = {
 931         .owner          = THIS_MODULE,
 932         .drv            = {
 933                 .name   = DRV_NAME,
 934         },
 935         .probe          = if_cs_probe,
 936         .remove         = if_cs_detach,
 937         .id_table       = if_cs_ids,
 938 };
 939
 940
 941 static int __init if_cs_init(void)
 942 {
 943         int ret;
 944
 945         lbs_deb_enter(LBS_DEB_CS);
 946         ret = pcmcia_register_driver(&libertas_driver);
 947         lbs_deb_leave(LBS_DEB_CS);
 948         return ret;
 949 }
 950
 951
 952 static void __exit if_cs_exit(void)
 953 {
 954         lbs_deb_enter(LBS_DEB_CS);
 955         pcmcia_unregister_driver(&libertas_driver);
 956         lbs_deb_leave(LBS_DEB_CS);
 957 }
 958
 959
 960 module_init(if_cs_init);
 961 module_exit(if_cs_exit);