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         struct lbs_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 < 1000; i++) {
 152                 u8 val = if_cs_read8(card, addr);
 153                 if (val == reg)
 154                         return i;
 155                 udelay(500);
 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_POWER_DOWN           0x0008
 174 #define IF_CS_H_IC_HOST_EVENT           0x0010
 175 #define IF_CS_H_IC_MASK                 0x001f
 176
 177 #define IF_CS_H_INT_MASK                0x00000004
 178 #define IF_CS_H_IM_MASK                 0x001f
 179
 180 #define IF_CS_H_WRITE_LEN               0x00000014
 181
 182 #define IF_CS_H_WRITE                   0x00000016
 183
 184 #define IF_CS_H_CMD_LEN                 0x00000018
 185
 186 #define IF_CS_H_CMD                     0x0000001A
 187
 188 #define IF_CS_C_READ_LEN                0x00000024
 189
 190 #define IF_CS_H_READ                    0x00000010
 191
 192 /* Card control registers and their bit definitions */
 193
 194 #define IF_CS_C_STATUS                  0x00000020
 195 #define IF_CS_C_S_TX_DNLD_RDY           0x0001
 196 #define IF_CS_C_S_RX_UPLD_RDY           0x0002
 197 #define IF_CS_C_S_CMD_DNLD_RDY          0x0004
 198 #define IF_CS_C_S_CMD_UPLD_RDY          0x0008
 199 #define IF_CS_C_S_CARDEVENT             0x0010
 200 #define IF_CS_C_S_MASK                  0x001f
 201 #define IF_CS_C_S_STATUS_MASK           0x7f00
 202 /* The following definitions should be the same as the MRVDRV_ ones */
 203
 204 #if MRVDRV_CMD_DNLD_RDY != IF_CS_C_S_CMD_DNLD_RDY
 205 #error MRVDRV_CMD_DNLD_RDY and IF_CS_C_S_CMD_DNLD_RDY not in sync
 206 #endif
 207 #if MRVDRV_CMD_UPLD_RDY != IF_CS_C_S_CMD_UPLD_RDY
 208 #error MRVDRV_CMD_UPLD_RDY and IF_CS_C_S_CMD_UPLD_RDY not in sync
 209 #endif
 210 #if MRVDRV_CARDEVENT != IF_CS_C_S_CARDEVENT
 211 #error MRVDRV_CARDEVENT and IF_CS_C_S_CARDEVENT not in sync
 212 #endif
 213
 214 #define IF_CS_C_INT_CAUSE               0x00000022
 215 #define IF_CS_C_IC_MASK                 0x001f
 216
 217 #define IF_CS_C_SQ_READ_LOW             0x00000028
 218 #define IF_CS_C_SQ_HELPER_OK            0x10
 219
 220 #define IF_CS_C_CMD_LEN                 0x00000030
 221
 222 #define IF_CS_C_CMD                     0x00000012
 223
 224 #define IF_CS_SCRATCH                   0x0000003F
 225
 226
 227
 228 /********************************************************************/
 229 /* Interrupts                                                       */
 230 /********************************************************************/
 231
 232 static inline void if_cs_enable_ints(struct if_cs_card *card)
 233 {
 234         lbs_deb_enter(LBS_DEB_CS);
 235         if_cs_write16(card, IF_CS_H_INT_MASK, 0);
 236 }
 237
 238 static inline void if_cs_disable_ints(struct if_cs_card *card)
 239 {
 240         lbs_deb_enter(LBS_DEB_CS);
 241         if_cs_write16(card, IF_CS_H_INT_MASK, IF_CS_H_IM_MASK);
 242 }
 243
 244 static irqreturn_t if_cs_interrupt(int irq, void *data)
 245 {
 246         struct if_cs_card *card = data;
 247         u16 int_cause;
 248
 249         lbs_deb_enter(LBS_DEB_CS);
 250
 251         int_cause = if_cs_read16(card, IF_CS_C_INT_CAUSE);
 252         if (int_cause == 0x0) {
 253                 /* Not for us */
 254                 return IRQ_NONE;
 255
 256         } else if (int_cause == 0xffff) {
 257                 /* Read in junk, the card has probably been removed */
 258                 card->priv->surpriseremoved = 1;
 259                 return IRQ_HANDLED;
 260         } else {
 261                 if (int_cause & IF_CS_H_IC_TX_OVER)
 262                         lbs_host_to_card_done(card->priv);
 263
 264                 /* clear interrupt */
 265                 if_cs_write16(card, IF_CS_C_INT_CAUSE, int_cause & IF_CS_C_IC_MASK);
 266         }
 267         spin_lock(&card->priv->driver_lock);
 268         lbs_interrupt(card->priv);
 269         spin_unlock(&card->priv->driver_lock);
 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(struct lbs_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(struct lbs_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(struct lbs_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 > LBS_CMD_BUFFER_SIZE)) {
 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         /* This is a workaround for a firmware that reports too much
 378          * bytes */
 379         *len -= 8;
 380         ret = 0;
 381 out:
 382         lbs_deb_leave_args(LBS_DEB_CS, "ret %d, len %d", ret, *len);
 383         return ret;
 384 }
 385
 386
 387 static struct sk_buff *if_cs_receive_data(struct lbs_private *priv)
 388 {
 389         struct sk_buff *skb = NULL;
 390         u16 len;
 391         u8 *data;
 392
 393         lbs_deb_enter(LBS_DEB_CS);
 394
 395         len = if_cs_read16(priv->card, IF_CS_C_READ_LEN);
 396         if (len == 0 || len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
 397                 lbs_pr_err("card data buffer has invalid # of bytes (%d)\n", len);
 398                 priv->stats.rx_dropped++;
 399                 printk(KERN_INFO "##HS %s:%d TODO\n", __FUNCTION__, __LINE__);
 400                 goto dat_err;
 401         }
 402
 403         //TODO: skb = dev_alloc_skb(len+ETH_FRAME_LEN+MRVDRV_SNAP_HEADER_LEN+EXTRA_LEN);
 404         skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + 2);
 405         if (!skb)
 406                 goto out;
 407         skb_put(skb, len);
 408         skb_reserve(skb, 2);/* 16 byte align */
 409         data = skb->data;
 410
 411         /* read even number of bytes, then odd byte if necessary */
 412         if_cs_read16_rep(priv->card, IF_CS_H_READ, data, len/sizeof(u16));
 413         if (len & 1)
 414                 data[len-1] = if_cs_read8(priv->card, IF_CS_H_READ);
 415
 416 dat_err:
 417         if_cs_write16(priv->card, IF_CS_H_STATUS, IF_CS_H_STATUS_RX_OVER);
 418         if_cs_write16(priv->card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_RX_OVER);
 419
 420 out:
 421         lbs_deb_leave_args(LBS_DEB_CS, "ret %p", skb);
 422         return skb;
 423 }
 424
 425
 426
 427 /********************************************************************/
 428 /* Firmware                                                         */
 429 /********************************************************************/
 430
 431 /*
 432  * Tries to program the helper firmware.
 433  *
 434  * Return 0 on success
 435  */
 436 static int if_cs_prog_helper(struct if_cs_card *card)
 437 {
 438         int ret = 0;
 439         int sent = 0;
 440         u8  scratch;
 441         const struct firmware *fw;
 442
 443         lbs_deb_enter(LBS_DEB_CS);
 444
 445         scratch = if_cs_read8(card, IF_CS_SCRATCH);
 446
 447         /* "If the value is 0x5a, the firmware is already
 448          * downloaded successfully"
 449          */
 450         if (scratch == 0x5a)
 451                 goto done;
 452
 453         /* "If the value is != 00, it is invalid value of register */
 454         if (scratch != 0x00) {
 455                 ret = -ENODEV;
 456                 goto done;
 457         }
 458
 459         /* TODO: make firmware file configurable */
 460         ret = request_firmware(&fw, "libertas_cs_helper.fw",
 461                 &handle_to_dev(card->p_dev));
 462         if (ret) {
 463                 lbs_pr_err("can't load helper firmware\n");
 464                 ret = -ENODEV;
 465                 goto done;
 466         }
 467         lbs_deb_cs("helper size %td\n", fw->size);
 468
 469         /* "Set the 5 bytes of the helper image to 0" */
 470         /* Not needed, this contains an ARM branch instruction */
 471
 472         for (;;) {
 473                 /* "the number of bytes to send is 256" */
 474                 int count = 256;
 475                 int remain = fw->size - sent;
 476
 477                 if (remain < count)
 478                         count = remain;
 479                 /* printk(KERN_INFO "//HS %d loading %d of %d bytes\n",
 480                         __LINE__, sent, fw->size); */
 481
 482                 /* "write the number of bytes to be sent to the I/O Command
 483                  * write length register" */
 484                 if_cs_write16(card, IF_CS_H_CMD_LEN, count);
 485
 486                 /* "write this to I/O Command port register as 16 bit writes */
 487                 if (count)
 488                         if_cs_write16_rep(card, IF_CS_H_CMD,
 489                                 &fw->data[sent],
 490                                 count >> 1);
 491
 492                 /* "Assert the download over interrupt command in the Host
 493                  * status register" */
 494                 if_cs_write8(card, IF_CS_H_STATUS, IF_CS_H_STATUS_DNLD_OVER);
 495
 496                 /* "Assert the download over interrupt command in the Card
 497                  * interrupt case register" */
 498                 if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_DNLD_OVER);
 499
 500                 /* "The host polls the Card Status register ... for 50 ms before
 501                    declaring a failure */
 502                 ret = if_cs_poll_while_fw_download(card, IF_CS_C_STATUS,
 503                         IF_CS_C_S_CMD_DNLD_RDY);
 504                 if (ret < 0) {
 505                         lbs_pr_err("can't download helper at 0x%x, ret %d\n",
 506                                 sent, ret);
 507                         goto done;
 508                 }
 509
 510                 if (count == 0)
 511                         break;
 512
 513                 sent += count;
 514         }
 515
 516         release_firmware(fw);
 517         ret = 0;
 518
 519 done:
 520         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
 521         return ret;
 522 }
 523
 524
 525 static int if_cs_prog_real(struct if_cs_card *card)
 526 {
 527         const struct firmware *fw;
 528         int ret = 0;
 529         int retry = 0;
 530         int len = 0;
 531         int sent;
 532
 533         lbs_deb_enter(LBS_DEB_CS);
 534
 535         /* TODO: make firmware file configurable */
 536         ret = request_firmware(&fw, "libertas_cs.fw",
 537                 &handle_to_dev(card->p_dev));
 538         if (ret) {
 539                 lbs_pr_err("can't load firmware\n");
 540                 ret = -ENODEV;
 541                 goto done;
 542         }
 543         lbs_deb_cs("fw size %td\n", fw->size);
 544
 545         ret = if_cs_poll_while_fw_download(card, IF_CS_C_SQ_READ_LOW, IF_CS_C_SQ_HELPER_OK);
 546         if (ret < 0) {
 547                 int i;
 548                 lbs_pr_err("helper firmware doesn't answer\n");
 549                 for (i = 0; i < 0x50; i += 2)
 550                         printk(KERN_INFO "## HS %02x: %04x\n",
 551                                 i, if_cs_read16(card, i));
 552                 goto err_release;
 553         }
 554
 555         for (sent = 0; sent < fw->size; sent += len) {
 556                 len = if_cs_read16(card, IF_CS_C_SQ_READ_LOW);
 557                 /* printk(KERN_INFO "//HS %d loading %d of %d bytes\n",
 558                         __LINE__, sent, fw->size); */
 559                 if (len & 1) {
 560                         retry++;
 561                         lbs_pr_info("odd, need to retry this firmware block\n");
 562                 } else {
 563                         retry = 0;
 564                 }
 565
 566                 if (retry > 20) {
 567                         lbs_pr_err("could not download firmware\n");
 568                         ret = -ENODEV;
 569                         goto err_release;
 570                 }
 571                 if (retry) {
 572                         sent -= len;
 573                 }
 574
 575
 576                 if_cs_write16(card, IF_CS_H_CMD_LEN, len);
 577
 578                 if_cs_write16_rep(card, IF_CS_H_CMD,
 579                         &fw->data[sent],
 580                         (len+1) >> 1);
 581                 if_cs_write8(card, IF_CS_H_STATUS, IF_CS_H_STATUS_DNLD_OVER);
 582                 if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_DNLD_OVER);
 583
 584                 ret = if_cs_poll_while_fw_download(card, IF_CS_C_STATUS,
 585                         IF_CS_C_S_CMD_DNLD_RDY);
 586                 if (ret < 0) {
 587                         lbs_pr_err("can't download firmware at 0x%x\n", sent);
 588                         goto err_release;
 589                 }
 590         }
 591
 592         ret = if_cs_poll_while_fw_download(card, IF_CS_SCRATCH, 0x5a);
 593         if (ret < 0) {
 594                 lbs_pr_err("firmware download failed\n");
 595                 goto err_release;
 596         }
 597
 598         ret = 0;
 599         goto done;
 600
 601
 602 err_release:
 603         release_firmware(fw);
 604
 605 done:
 606         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
 607         return ret;
 608 }
 609
 610
 611
 612 /********************************************************************/
 613 /* Callback functions for libertas.ko                               */
 614 /********************************************************************/
 615
 616 /* Send commands or data packets to the card */
 617 static int if_cs_host_to_card(struct lbs_private *priv,
 618         u8 type,
 619         u8 *buf,
 620         u16 nb)
 621 {
 622         int ret = -1;
 623
 624         lbs_deb_enter_args(LBS_DEB_CS, "type %d, bytes %d", type, nb);
 625
 626         switch (type) {
 627         case MVMS_DAT:
 628                 priv->dnld_sent = DNLD_DATA_SENT;
 629                 if_cs_send_data(priv, buf, nb);
 630                 ret = 0;
 631                 break;
 632         case MVMS_CMD:
 633                 priv->dnld_sent = DNLD_CMD_SENT;
 634                 ret = if_cs_send_cmd(priv, buf, nb);
 635                 break;
 636         default:
 637                 lbs_pr_err("%s: unsupported type %d\n", __FUNCTION__, type);
 638         }
 639
 640         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
 641         return ret;
 642 }
 643
 644
 645 static int if_cs_get_int_status(struct lbs_private *priv, u8 *ireg)
 646 {
 647         struct if_cs_card *card = (struct if_cs_card *)priv->card;
 648         int ret = 0;
 649         u16 int_cause;
 650         *ireg = 0;
 651
 652         lbs_deb_enter(LBS_DEB_CS);
 653
 654         if (priv->surpriseremoved)
 655                 goto out;
 656
 657         int_cause = if_cs_read16(card, IF_CS_C_INT_CAUSE) & IF_CS_C_IC_MASK;
 658         if_cs_write16(card, IF_CS_C_INT_CAUSE, int_cause);
 659
 660         *ireg = if_cs_read16(card, IF_CS_C_STATUS) & IF_CS_C_S_MASK;
 661
 662         if (!*ireg)
 663                 goto sbi_get_int_status_exit;
 664
 665 sbi_get_int_status_exit:
 666
 667         /* is there a data packet for us? */
 668         if (*ireg & IF_CS_C_S_RX_UPLD_RDY) {
 669                 struct sk_buff *skb = if_cs_receive_data(priv);
 670                 lbs_process_rxed_packet(priv, skb);
 671                 *ireg &= ~IF_CS_C_S_RX_UPLD_RDY;
 672         }
 673
 674         if (*ireg & IF_CS_C_S_TX_DNLD_RDY) {
 675                 priv->dnld_sent = DNLD_RES_RECEIVED;
 676         }
 677
 678         /* Card has a command result for us */
 679         if (*ireg & IF_CS_C_S_CMD_UPLD_RDY) {
 680                 spin_lock(&priv->driver_lock);
 681                 ret = if_cs_receive_cmdres(priv, priv->upld_buf, &priv->upld_len);
 682                 spin_unlock(&priv->driver_lock);
 683                 if (ret < 0)
 684                         lbs_pr_err("could not receive cmd from card\n");
 685         }
 686
 687 out:
 688         lbs_deb_leave_args(LBS_DEB_CS, "ret %d, ireg 0x%x, hisregcpy 0x%x", ret, *ireg, priv->hisregcpy);
 689         return ret;
 690 }
 691
 692
 693 static int if_cs_read_event_cause(struct lbs_private *priv)
 694 {
 695         lbs_deb_enter(LBS_DEB_CS);
 696
 697         priv->eventcause = (if_cs_read16(priv->card, IF_CS_C_STATUS) & IF_CS_C_S_STATUS_MASK) >> 5;
 698         if_cs_write16(priv->card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_HOST_EVENT);
 699
 700         return 0;
 701 }
 702
 703
 704
 705 /********************************************************************/
 706 /* Card Services                                                    */
 707 /********************************************************************/
 708
 709 /*
 710  * After a card is removed, if_cs_release() will unregister the
 711  * device, and release the PCMCIA configuration.  If the device is
 712  * still open, this will be postponed until it is closed.
 713  */
 714 static void if_cs_release(struct pcmcia_device *p_dev)
 715 {
 716         struct if_cs_card *card = p_dev->priv;
 717
 718         lbs_deb_enter(LBS_DEB_CS);
 719
 720         free_irq(p_dev->irq.AssignedIRQ, card);
 721         pcmcia_disable_device(p_dev);
 722         if (card->iobase)
 723                 ioport_unmap(card->iobase);
 724
 725         lbs_deb_leave(LBS_DEB_CS);
 726 }
 727
 728
 729 /*
 730  * This creates an "instance" of the driver, allocating local data
 731  * structures for one device.  The device is registered with Card
 732  * Services.
 733  *
 734  * The dev_link structure is initialized, but we don't actually
 735  * configure the card at this point -- we wait until we receive a card
 736  * insertion event.
 737  */
 738 static int if_cs_probe(struct pcmcia_device *p_dev)
 739 {
 740         int ret = -ENOMEM;
 741         struct lbs_private *priv;
 742         struct if_cs_card *card;
 743         /* CIS parsing */
 744         tuple_t tuple;
 745         cisparse_t parse;
 746         cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
 747         cistpl_io_t *io = &cfg->io;
 748         u_char buf[64];
 749
 750         lbs_deb_enter(LBS_DEB_CS);
 751
 752         card = kzalloc(sizeof(struct if_cs_card), GFP_KERNEL);
 753         if (!card) {
 754                 lbs_pr_err("error in kzalloc\n");
 755                 goto out;
 756         }
 757         card->p_dev = p_dev;
 758         p_dev->priv = card;
 759
 760         p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
 761         p_dev->irq.Handler = NULL;
 762         p_dev->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_LEVEL_ID;
 763
 764         p_dev->conf.Attributes = 0;
 765         p_dev->conf.IntType = INT_MEMORY_AND_IO;
 766
 767         tuple.Attributes = 0;
 768         tuple.TupleData = buf;
 769         tuple.TupleDataMax = sizeof(buf);
 770         tuple.TupleOffset = 0;
 771
 772         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 773         if ((ret = pcmcia_get_first_tuple(p_dev, &tuple)) != 0 ||
 774             (ret = pcmcia_get_tuple_data(p_dev, &tuple)) != 0 ||
 775             (ret = pcmcia_parse_tuple(p_dev, &tuple, &parse)) != 0)
 776         {
 777                 lbs_pr_err("error in pcmcia_get_first_tuple etc\n");
 778                 goto out1;
 779         }
 780
 781         p_dev->conf.ConfigIndex = cfg->index;
 782
 783         /* Do we need to allocate an interrupt? */
 784         if (cfg->irq.IRQInfo1) {
 785                 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
 786         }
 787
 788         /* IO window settings */
 789         if (cfg->io.nwin != 1) {
 790                 lbs_pr_err("wrong CIS (check number of IO windows)\n");
 791                 ret = -ENODEV;
 792                 goto out1;
 793         }
 794         p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 795         p_dev->io.BasePort1 = io->win[0].base;
 796         p_dev->io.NumPorts1 = io->win[0].len;
 797
 798         /* This reserves IO space but doesn't actually enable it */
 799         ret = pcmcia_request_io(p_dev, &p_dev->io);
 800         if (ret) {
 801                 lbs_pr_err("error in pcmcia_request_io\n");
 802                 goto out1;
 803         }
 804
 805         /*
 806          * Allocate an interrupt line.  Note that this does not assign
 807          * a handler to the interrupt, unless the 'Handler' member of
 808          * the irq structure is initialized.
 809          */
 810         if (p_dev->conf.Attributes & CONF_ENABLE_IRQ) {
 811                 ret = pcmcia_request_irq(p_dev, &p_dev->irq);
 812                 if (ret) {
 813                         lbs_pr_err("error in pcmcia_request_irq\n");
 814                         goto out1;
 815                 }
 816         }
 817
 818         /* Initialize io access */
 819         card->iobase = ioport_map(p_dev->io.BasePort1, p_dev->io.NumPorts1);
 820         if (!card->iobase) {
 821                 lbs_pr_err("error in ioport_map\n");
 822                 ret = -EIO;
 823                 goto out1;
 824         }
 825
 826         /*
 827          * This actually configures the PCMCIA socket -- setting up
 828          * the I/O windows and the interrupt mapping, and putting the
 829          * card and host interface into "Memory and IO" mode.
 830          */
 831         ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
 832         if (ret) {
 833                 lbs_pr_err("error in pcmcia_request_configuration\n");
 834                 goto out2;
 835         }
 836
 837         /* Finally, report what we've done */
 838         lbs_deb_cs("irq %d, io 0x%04x-0x%04x\n",
 839                p_dev->irq.AssignedIRQ, p_dev->io.BasePort1,
 840                p_dev->io.BasePort1 + p_dev->io.NumPorts1 - 1);
 841
 842
 843         /* Load the firmware early, before calling into libertas.ko */
 844         ret = if_cs_prog_helper(card);
 845         if (ret == 0)
 846                 ret = if_cs_prog_real(card);
 847         if (ret)
 848                 goto out2;
 849
 850         /* Make this card known to the libertas driver */
 851         priv = lbs_add_card(card, &p_dev->dev);
 852         if (!priv) {
 853                 ret = -ENOMEM;
 854                 goto out2;
 855         }
 856
 857         /* Store pointers to our call-back functions */
 858         card->priv = priv;
 859         priv->card = card;
 860         priv->hw_host_to_card     = if_cs_host_to_card;
 861         priv->hw_get_int_status   = if_cs_get_int_status;
 862         priv->hw_read_event_cause = if_cs_read_event_cause;
 863
 864         priv->fw_ready = 1;
 865
 866         /* Now actually get the IRQ */
 867         ret = request_irq(p_dev->irq.AssignedIRQ, if_cs_interrupt,
 868                 IRQF_SHARED, DRV_NAME, card);
 869         if (ret) {
 870                 lbs_pr_err("error in request_irq\n");
 871                 goto out3;
 872         }
 873
 874         /* Clear any interrupt cause that happend while sending
 875          * firmware/initializing card */
 876         if_cs_write16(card, IF_CS_C_INT_CAUSE, IF_CS_C_IC_MASK);
 877         if_cs_enable_ints(card);
 878
 879         /* And finally bring the card up */
 880         if (lbs_start_card(priv) != 0) {
 881                 lbs_pr_err("could not activate card\n");
 882                 goto out3;
 883         }
 884
 885         ret = 0;
 886         goto out;
 887
 888 out3:
 889         lbs_remove_card(priv);
 890 out2:
 891         ioport_unmap(card->iobase);
 892 out1:
 893         pcmcia_disable_device(p_dev);
 894 out:
 895         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
 896         return ret;
 897 }
 898
 899
 900 /*
 901  * This deletes a driver "instance".  The device is de-registered with
 902  * Card Services.  If it has been released, all local data structures
 903  * are freed.  Otherwise, the structures will be freed when the device
 904  * is released.
 905  */
 906 static void if_cs_detach(struct pcmcia_device *p_dev)
 907 {
 908         struct if_cs_card *card = p_dev->priv;
 909
 910         lbs_deb_enter(LBS_DEB_CS);
 911
 912         lbs_stop_card(card->priv);
 913         lbs_remove_card(card->priv);
 914         if_cs_disable_ints(card);
 915         if_cs_release(p_dev);
 916         kfree(card);
 917
 918         lbs_deb_leave(LBS_DEB_CS);
 919 }
 920
 921
 922
 923 /********************************************************************/
 924 /* Module initialization                                            */
 925 /********************************************************************/
 926
 927 static struct pcmcia_device_id if_cs_ids[] = {
 928         PCMCIA_DEVICE_MANF_CARD(0x02df, 0x8103),
 929         PCMCIA_DEVICE_NULL,
 930 };
 931 MODULE_DEVICE_TABLE(pcmcia, if_cs_ids);
 932
 933
 934 static struct pcmcia_driver lbs_driver = {
 935         .owner          = THIS_MODULE,
 936         .drv            = {
 937                 .name   = DRV_NAME,
 938         },
 939         .probe          = if_cs_probe,
 940         .remove         = if_cs_detach,
 941         .id_table       = if_cs_ids,
 942 };
 943
 944
 945 static int __init if_cs_init(void)
 946 {
 947         int ret;
 948
 949         lbs_deb_enter(LBS_DEB_CS);
 950         ret = pcmcia_register_driver(&lbs_driver);
 951         lbs_deb_leave(LBS_DEB_CS);
 952         return ret;
 953 }
 954
 955
 956 static void __exit if_cs_exit(void)
 957 {
 958         lbs_deb_enter(LBS_DEB_CS);
 959         pcmcia_unregister_driver(&lbs_driver);
 960         lbs_deb_leave(LBS_DEB_CS);
 961 }
 962
 963
 964 module_init(if_cs_init);
 965 module_exit(if_cs_exit);