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 < 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 = (struct if_cs_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->adapter->surpriseremoved = 1;
 259
 260         } else {
 261                 if(int_cause & IF_CS_H_IC_TX_OVER) {
 262                         card->priv->dnld_sent = DNLD_RES_RECEIVED;
 263                         if (!card->priv->adapter->cur_cmd)
 264                                 wake_up_interruptible(&card->priv->waitq);
 265
 266                         if (card->priv->adapter->connect_status == LIBERTAS_CONNECTED)
 267                                 netif_wake_queue(card->priv->dev);
 268                 }
 269
 270                 /* clear interrupt */
 271                 if_cs_write16(card, IF_CS_C_INT_CAUSE, int_cause & IF_CS_C_IC_MASK);
 272         }
 273
 274         libertas_interrupt(card->priv->dev);
 275
 276         return IRQ_HANDLED;
 277 }
 278
 279
 280
 281
 282 /********************************************************************/
 283 /* I/O                                                              */
 284 /********************************************************************/
 285
 286 /*
 287  * Called from if_cs_host_to_card to send a command to the hardware
 288  */
 289 static int if_cs_send_cmd(wlan_private *priv, u8 *buf, u16 nb)
 290 {
 291         struct if_cs_card *card = (struct if_cs_card *)priv->card;
 292         int ret = -1;
 293         int loops = 0;
 294
 295         lbs_deb_enter(LBS_DEB_CS);
 296
 297         /* Is hardware ready? */
 298         while (1) {
 299                 u16 val = if_cs_read16(card, IF_CS_C_STATUS);
 300                 if (val & IF_CS_C_S_CMD_DNLD_RDY)
 301                         break;
 302                 if (++loops > 100) {
 303                         lbs_pr_err("card not ready for commands\n");
 304                         goto done;
 305                 }
 306                 mdelay(1);
 307         }
 308
 309         if_cs_write16(card, IF_CS_H_CMD_LEN, nb);
 310
 311         if_cs_write16_rep(card, IF_CS_H_CMD, buf, nb / 2);
 312         /* Are we supposed to transfer an odd amount of bytes? */
 313         if (nb & 1)
 314                 if_cs_write8(card, IF_CS_H_CMD, buf[nb-1]);
 315
 316         /* "Assert the download over interrupt command in the Host
 317          * status register" */
 318         if_cs_write16(card, IF_CS_H_STATUS, IF_CS_H_STATUS_DNLD_OVER);
 319
 320         /* "Assert the download over interrupt command in the Card
 321          * interrupt case register" */
 322         if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_DNLD_OVER);
 323         ret = 0;
 324
 325 done:
 326         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
 327         return ret;
 328 }
 329
 330
 331 /*
 332  * Called from if_cs_host_to_card to send a data to the hardware
 333  */
 334 static void if_cs_send_data(wlan_private *priv, u8 *buf, u16 nb)
 335 {
 336         struct if_cs_card *card = (struct if_cs_card *)priv->card;
 337
 338         lbs_deb_enter(LBS_DEB_CS);
 339
 340         if_cs_write16(card, IF_CS_H_WRITE_LEN, nb);
 341
 342         /* write even number of bytes, then odd byte if necessary */
 343         if_cs_write16_rep(card, IF_CS_H_WRITE, buf, nb / 2);
 344         if (nb & 1)
 345                 if_cs_write8(card, IF_CS_H_WRITE, buf[nb-1]);
 346
 347         if_cs_write16(card, IF_CS_H_STATUS, IF_CS_H_STATUS_TX_OVER);
 348         if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_STATUS_TX_OVER);
 349
 350         lbs_deb_leave(LBS_DEB_CS);
 351 }
 352
 353
 354 /*
 355  * Get the command result out of the card.
 356  */
 357 static int if_cs_receive_cmdres(wlan_private *priv, u8* data, u32 *len)
 358 {
 359         int ret = -1;
 360         u16 val;
 361
 362         lbs_deb_enter(LBS_DEB_CS);
 363
 364         /* is hardware ready? */
 365         val = if_cs_read16(priv->card, IF_CS_C_STATUS);
 366         if ((val & IF_CS_C_S_CMD_UPLD_RDY) == 0) {
 367                 lbs_pr_err("card not ready for CMD\n");
 368                 goto out;
 369         }
 370
 371         *len = if_cs_read16(priv->card, IF_CS_C_CMD_LEN);
 372         if ((*len == 0) || (*len > MRVDRV_SIZE_OF_CMD_BUFFER)) {
 373                 lbs_pr_err("card cmd buffer has invalid # of bytes (%d)\n", *len);
 374                 goto out;
 375         }
 376
 377         /* read even number of bytes, then odd byte if necessary */
 378         if_cs_read16_rep(priv->card, IF_CS_C_CMD, data, *len/sizeof(u16));
 379         if (*len & 1)
 380                 data[*len-1] = if_cs_read8(priv->card, IF_CS_C_CMD);
 381
 382         ret = 0;
 383 out:
 384         lbs_deb_leave_args(LBS_DEB_CS, "ret %d, len %d", ret, *len);
 385         return ret;
 386 }
 387
 388
 389 static struct sk_buff *if_cs_receive_data(wlan_private *priv)
 390 {
 391         struct sk_buff *skb = NULL;
 392         u16 len;
 393         u8 *data;
 394
 395         lbs_deb_enter(LBS_DEB_CS);
 396
 397         len = if_cs_read16(priv->card, IF_CS_C_READ_LEN);
 398         if (len == 0 || len > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
 399                 lbs_pr_err("card data buffer has invalid # of bytes (%d)\n", len);
 400                 priv->stats.rx_dropped++;
 401                 printk(KERN_INFO "##HS %s:%d TODO\n", __FUNCTION__, __LINE__);
 402                 goto dat_err;
 403         }
 404
 405         //TODO: skb = dev_alloc_skb(len+ETH_FRAME_LEN+MRVDRV_SNAP_HEADER_LEN+EXTRA_LEN);
 406         skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + 2);
 407         if (!skb)
 408                 goto out;
 409         skb_put(skb, len);
 410         skb_reserve(skb, 2);/* 16 byte align */
 411         data = skb->data;
 412
 413         /* read even number of bytes, then odd byte if necessary */
 414         if_cs_read16_rep(priv->card, IF_CS_H_READ, data, len/sizeof(u16));
 415         if (len & 1)
 416                 data[len-1] = if_cs_read8(priv->card, IF_CS_H_READ);
 417
 418 dat_err:
 419         if_cs_write16(priv->card, IF_CS_H_STATUS, IF_CS_H_STATUS_RX_OVER);
 420         if_cs_write16(priv->card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_RX_OVER);
 421
 422 out:
 423         lbs_deb_leave_args(LBS_DEB_CS, "ret %p", skb);
 424         return skb;
 425 }
 426
 427
 428
 429 /********************************************************************/
 430 /* Firmware                                                         */
 431 /********************************************************************/
 432
 433 /*
 434  * Tries to program the helper firmware.
 435  *
 436  * Return 0 on success
 437  */
 438 static int if_cs_prog_helper(struct if_cs_card *card)
 439 {
 440         int ret = 0;
 441         int sent = 0;
 442         u8  scratch;
 443         const struct firmware *fw;
 444
 445         lbs_deb_enter(LBS_DEB_CS);
 446
 447         scratch = if_cs_read8(card, IF_CS_SCRATCH);
 448
 449         /* "If the value is 0x5a, the firmware is already
 450          * downloaded successfully"
 451          */
 452         if (scratch == 0x5a)
 453                 goto done;
 454
 455         /* "If the value is != 00, it is invalid value of register */
 456         if (scratch != 0x00) {
 457                 ret = -ENODEV;
 458                 goto done;
 459         }
 460
 461         /* TODO: make firmware file configurable */
 462         ret = request_firmware(&fw, "libertas_cs_helper.fw",
 463                 &handle_to_dev(card->p_dev));
 464         if (ret) {
 465                 lbs_pr_err("can't load helper firmware\n");
 466                 ret = -ENODEV;
 467                 goto done;
 468         }
 469         lbs_deb_cs("helper size %td\n", fw->size);
 470
 471         /* "Set the 5 bytes of the helper image to 0" */
 472         /* Not needed, this contains an ARM branch instruction */
 473
 474         for (;;) {
 475                 /* "the number of bytes to send is 256" */
 476                 int count = 256;
 477                 int remain = fw->size - sent;
 478
 479                 if (remain < count)
 480                         count = remain;
 481                 /* printk(KERN_INFO "//HS %d loading %d of %d bytes\n",
 482                         __LINE__, sent, fw->size); */
 483
 484                 /* "write the number of bytes to be sent to the I/O Command
 485                  * write length register" */
 486                 if_cs_write16(card, IF_CS_H_CMD_LEN, count);
 487
 488                 /* "write this to I/O Command port register as 16 bit writes */
 489                 if (count)
 490                         if_cs_write16_rep(card, IF_CS_H_CMD,
 491                                 &fw->data[sent],
 492                                 count >> 1);
 493
 494                 /* "Assert the download over interrupt command in the Host
 495                  * status register" */
 496                 if_cs_write8(card, IF_CS_H_STATUS, IF_CS_H_STATUS_DNLD_OVER);
 497
 498                 /* "Assert the download over interrupt command in the Card
 499                  * interrupt case register" */
 500                 if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_DNLD_OVER);
 501
 502                 /* "The host polls the Card Status register ... for 50 ms before
 503                    declaring a failure */
 504                 ret = if_cs_poll_while_fw_download(card, IF_CS_C_STATUS,
 505                         IF_CS_C_S_CMD_DNLD_RDY);
 506                 if (ret < 0) {
 507                         lbs_pr_err("can't download helper at 0x%x, ret %d\n",
 508                                 sent, ret);
 509                         goto done;
 510                 }
 511
 512                 if (count == 0)
 513                         break;
 514
 515                 sent += count;
 516         }
 517
 518         release_firmware(fw);
 519         ret = 0;
 520
 521 done:
 522         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
 523         return ret;
 524 }
 525
 526
 527 static int if_cs_prog_real(struct if_cs_card *card)
 528 {
 529         const struct firmware *fw;
 530         int ret = 0;
 531         int retry = 0;
 532         int len = 0;
 533         int sent;
 534
 535         lbs_deb_enter(LBS_DEB_CS);
 536
 537         /* TODO: make firmware file configurable */
 538         ret = request_firmware(&fw, "libertas_cs.fw",
 539                 &handle_to_dev(card->p_dev));
 540         if (ret) {
 541                 lbs_pr_err("can't load firmware\n");
 542                 ret = -ENODEV;
 543                 goto done;
 544         }
 545         lbs_deb_cs("fw size %td\n", fw->size);
 546
 547         ret = if_cs_poll_while_fw_download(card, IF_CS_C_SQ_READ_LOW, IF_CS_C_SQ_HELPER_OK);
 548         if (ret < 0) {
 549                 int i;
 550                 lbs_pr_err("helper firmware doesn't answer\n");
 551                 for (i = 0; i < 0x50; i += 2)
 552                         printk(KERN_INFO "## HS %02x: %04x\n",
 553                                 i, if_cs_read16(card, i));
 554                 goto err_release;
 555         }
 556
 557         for (sent = 0; sent < fw->size; sent += len) {
 558                 len = if_cs_read16(card, IF_CS_C_SQ_READ_LOW);
 559                 /* printk(KERN_INFO "//HS %d loading %d of %d bytes\n",
 560                         __LINE__, sent, fw->size); */
 561                 if (len & 1) {
 562                         retry++;
 563                         lbs_pr_info("odd, need to retry this firmware block\n");
 564                 } else {
 565                         retry = 0;
 566                 }
 567
 568                 if (retry > 20) {
 569                         lbs_pr_err("could not download firmware\n");
 570                         ret = -ENODEV;
 571                         goto err_release;
 572                 }
 573                 if (retry) {
 574                         sent -= len;
 575                 }
 576
 577
 578                 if_cs_write16(card, IF_CS_H_CMD_LEN, len);
 579
 580                 if_cs_write16_rep(card, IF_CS_H_CMD,
 581                         &fw->data[sent],
 582                         (len+1) >> 1);
 583                 if_cs_write8(card, IF_CS_H_STATUS, IF_CS_H_STATUS_DNLD_OVER);
 584                 if_cs_write16(card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_DNLD_OVER);
 585
 586                 ret = if_cs_poll_while_fw_download(card, IF_CS_C_STATUS,
 587                         IF_CS_C_S_CMD_DNLD_RDY);
 588                 if (ret < 0) {
 589                         lbs_pr_err("can't download firmware at 0x%x\n", sent);
 590                         goto err_release;
 591                 }
 592         }
 593
 594         ret = if_cs_poll_while_fw_download(card, IF_CS_SCRATCH, 0x5a);
 595         if (ret < 0) {
 596                 lbs_pr_err("firmware download failed\n");
 597                 goto err_release;
 598         }
 599
 600         ret = 0;
 601         goto done;
 602
 603
 604 err_release:
 605         release_firmware(fw);
 606
 607 done:
 608         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
 609         return ret;
 610 }
 611
 612
 613
 614 /********************************************************************/
 615 /* Callback functions for libertas.ko                               */
 616 /********************************************************************/
 617
 618 /* Send commands or data packets to the card */
 619 static int if_cs_host_to_card(wlan_private *priv, u8 type, u8 *buf, u16 nb)
 620 {
 621         int ret = -1;
 622
 623         lbs_deb_enter_args(LBS_DEB_CS, "type %d, bytes %d", type, nb);
 624
 625         switch (type) {
 626         case MVMS_DAT:
 627                 priv->dnld_sent = DNLD_DATA_SENT;
 628                 if_cs_send_data(priv, buf, nb);
 629                 ret = 0;
 630                 break;
 631         case MVMS_CMD:
 632                 priv->dnld_sent = DNLD_CMD_SENT;
 633                 ret = if_cs_send_cmd(priv, buf, nb);
 634                 break;
 635         default:
 636                 lbs_pr_err("%s: unsupported type %d\n", __FUNCTION__, type);
 637         }
 638
 639         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
 640         return ret;
 641 }
 642
 643
 644 static int if_cs_get_int_status(wlan_private *priv, u8 *ireg)
 645 {
 646         struct if_cs_card *card = (struct if_cs_card *)priv->card;
 647         //wlan_adapter *adapter = priv->adapter;
 648         int ret = 0;
 649         u16 int_cause;
 650         u8 *cmdbuf;
 651         *ireg = 0;
 652
 653         lbs_deb_enter(LBS_DEB_CS);
 654
 655         if (priv->adapter->surpriseremoved)
 656                 goto out;
 657
 658         int_cause = if_cs_read16(card, IF_CS_C_INT_CAUSE) & IF_CS_C_IC_MASK;
 659         if_cs_write16(card, IF_CS_C_INT_CAUSE, int_cause);
 660
 661         *ireg = if_cs_read16(card, IF_CS_C_STATUS) & IF_CS_C_S_MASK;
 662
 663         if (!*ireg)
 664                 goto sbi_get_int_status_exit;
 665
 666 sbi_get_int_status_exit:
 667
 668         /* is there a data packet for us? */
 669         if (*ireg & IF_CS_C_S_RX_UPLD_RDY) {
 670                 struct sk_buff *skb = if_cs_receive_data(priv);
 671                 libertas_process_rxed_packet(priv, skb);
 672                 *ireg &= ~IF_CS_C_S_RX_UPLD_RDY;
 673         }
 674
 675         if (*ireg & IF_CS_C_S_TX_DNLD_RDY) {
 676                 priv->dnld_sent = DNLD_RES_RECEIVED;
 677         }
 678
 679         /* Card has a command result for us */
 680         if (*ireg & IF_CS_C_S_CMD_UPLD_RDY) {
 681                 spin_lock(&priv->adapter->driver_lock);
 682                 if (!priv->adapter->cur_cmd) {
 683                         cmdbuf = priv->upld_buf;
 684                         priv->adapter->hisregcpy &= ~IF_CS_C_S_RX_UPLD_RDY;
 685                 } else {
 686                         cmdbuf = priv->adapter->cur_cmd->bufvirtualaddr;
 687                 }
 688
 689                 ret = if_cs_receive_cmdres(priv, cmdbuf, &priv->upld_len);
 690                 spin_unlock(&priv->adapter->driver_lock);
 691                 if (ret < 0)
 692                         lbs_pr_err("could not receive cmd from card\n");
 693         }
 694
 695 out:
 696         lbs_deb_leave_args(LBS_DEB_CS, "ret %d, ireg 0x%x, hisregcpy 0x%x", ret, *ireg, priv->adapter->hisregcpy);
 697         return ret;
 698 }
 699
 700
 701 static int if_cs_read_event_cause(wlan_private *priv)
 702 {
 703         lbs_deb_enter(LBS_DEB_CS);
 704
 705         priv->adapter->eventcause = (if_cs_read16(priv->card, IF_CS_C_STATUS) & IF_CS_C_S_STATUS_MASK) >> 5;
 706         if_cs_write16(priv->card, IF_CS_H_INT_CAUSE, IF_CS_H_IC_HOST_EVENT);
 707
 708         return 0;
 709 }
 710
 711
 712
 713 /********************************************************************/
 714 /* Card Services                                                    */
 715 /********************************************************************/
 716
 717 /*
 718  * After a card is removed, if_cs_release() will unregister the
 719  * device, and release the PCMCIA configuration.  If the device is
 720  * still open, this will be postponed until it is closed.
 721  */
 722 static void if_cs_release(struct pcmcia_device *p_dev)
 723 {
 724         struct if_cs_card *card = p_dev->priv;
 725
 726         lbs_deb_enter(LBS_DEB_CS);
 727
 728         pcmcia_disable_device(p_dev);
 729         free_irq(p_dev->irq.AssignedIRQ, card);
 730         if (card->iobase)
 731                 ioport_unmap(card->iobase);
 732
 733         lbs_deb_leave(LBS_DEB_CS);
 734 }
 735
 736
 737 /*
 738  * This creates an "instance" of the driver, allocating local data
 739  * structures for one device.  The device is registered with Card
 740  * Services.
 741  *
 742  * The dev_link structure is initialized, but we don't actually
 743  * configure the card at this point -- we wait until we receive a card
 744  * insertion event.
 745  */
 746 static int if_cs_probe(struct pcmcia_device *p_dev)
 747 {
 748         int ret = -ENOMEM;
 749         wlan_private *priv;
 750         struct if_cs_card *card;
 751         /* CIS parsing */
 752         tuple_t tuple;
 753         cisparse_t parse;
 754         cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
 755         cistpl_io_t *io = &cfg->io;
 756         u_char buf[64];
 757
 758         lbs_deb_enter(LBS_DEB_CS);
 759
 760         card = kzalloc(sizeof(struct if_cs_card), GFP_KERNEL);
 761         if (!card) {
 762                 lbs_pr_err("error in kzalloc\n");
 763                 goto out;
 764         }
 765         card->p_dev = p_dev;
 766         p_dev->priv = card;
 767
 768         p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
 769         p_dev->irq.Handler = NULL;
 770         p_dev->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_LEVEL_ID;
 771
 772         p_dev->conf.Attributes = 0;
 773         p_dev->conf.IntType = INT_MEMORY_AND_IO;
 774
 775         tuple.Attributes = 0;
 776         tuple.TupleData = buf;
 777         tuple.TupleDataMax = sizeof(buf);
 778         tuple.TupleOffset = 0;
 779
 780         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 781         if ((ret = pcmcia_get_first_tuple(p_dev, &tuple)) != 0 ||
 782             (ret = pcmcia_get_tuple_data(p_dev, &tuple)) != 0 ||
 783             (ret = pcmcia_parse_tuple(p_dev, &tuple, &parse)) != 0)
 784         {
 785                 lbs_pr_err("error in pcmcia_get_first_tuple etc\n");
 786                 goto out1;
 787         }
 788
 789         p_dev->conf.ConfigIndex = cfg->index;
 790
 791         /* Do we need to allocate an interrupt? */
 792         if (cfg->irq.IRQInfo1) {
 793                 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
 794         }
 795
 796         /* IO window settings */
 797         if (cfg->io.nwin != 1) {
 798                 lbs_pr_err("wrong CIS (check number of IO windows)\n");
 799                 ret = -ENODEV;
 800                 goto out1;
 801         }
 802         p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
 803         p_dev->io.BasePort1 = io->win[0].base;
 804         p_dev->io.NumPorts1 = io->win[0].len;
 805
 806         /* This reserves IO space but doesn't actually enable it */
 807         ret = pcmcia_request_io(p_dev, &p_dev->io);
 808         if (ret) {
 809                 lbs_pr_err("error in pcmcia_request_io\n");
 810                 goto out1;
 811         }
 812
 813         /*
 814          * Allocate an interrupt line.  Note that this does not assign
 815          * a handler to the interrupt, unless the 'Handler' member of
 816          * the irq structure is initialized.
 817          */
 818         if (p_dev->conf.Attributes & CONF_ENABLE_IRQ) {
 819                 ret = pcmcia_request_irq(p_dev, &p_dev->irq);
 820                 if (ret) {
 821                         lbs_pr_err("error in pcmcia_request_irq\n");
 822                         goto out1;
 823                 }
 824         }
 825
 826         /* Initialize io access */
 827         card->iobase = ioport_map(p_dev->io.BasePort1, p_dev->io.NumPorts1);
 828         if (!card->iobase) {
 829                 lbs_pr_err("error in ioport_map\n");
 830                 ret = -EIO;
 831                 goto out1;
 832         }
 833
 834         /*
 835          * This actually configures the PCMCIA socket -- setting up
 836          * the I/O windows and the interrupt mapping, and putting the
 837          * card and host interface into "Memory and IO" mode.
 838          */
 839         ret = pcmcia_request_configuration(p_dev, &p_dev->conf);
 840         if (ret) {
 841                 lbs_pr_err("error in pcmcia_request_configuration\n");
 842                 goto out2;
 843         }
 844
 845         /* Finally, report what we've done */
 846         lbs_deb_cs("irq %d, io 0x%04x-0x%04x\n",
 847                p_dev->irq.AssignedIRQ, p_dev->io.BasePort1,
 848                p_dev->io.BasePort1 + p_dev->io.NumPorts1 - 1);
 849
 850
 851         /* Load the firmware early, before calling into libertas.ko */
 852         ret = if_cs_prog_helper(card);
 853         if (ret == 0)
 854                 ret = if_cs_prog_real(card);
 855         if (ret)
 856                 goto out2;
 857
 858         /* Make this card known to the libertas driver */
 859         priv = libertas_add_card(card, &p_dev->dev);
 860         if (!priv) {
 861                 ret = -ENOMEM;
 862                 goto out2;
 863         }
 864
 865         /* Store pointers to our call-back functions */
 866         card->priv = priv;
 867         priv->card = card;
 868         priv->hw_host_to_card     = if_cs_host_to_card;
 869         priv->hw_get_int_status   = if_cs_get_int_status;
 870         priv->hw_read_event_cause = if_cs_read_event_cause;
 871
 872         priv->adapter->fw_ready = 1;
 873
 874         /* Now actually get the IRQ */
 875         ret = request_irq(p_dev->irq.AssignedIRQ, if_cs_interrupt,
 876                 IRQF_SHARED, DRV_NAME, card);
 877         if (ret) {
 878                 lbs_pr_err("error in request_irq\n");
 879                 goto out3;
 880         }
 881
 882         /* Clear any interrupt cause that happend while sending
 883          * firmware/initializing card */
 884         if_cs_write16(card, IF_CS_C_INT_CAUSE, IF_CS_C_IC_MASK);
 885         if_cs_enable_ints(card);
 886
 887         /* And finally bring the card up */
 888         if (libertas_start_card(priv) != 0) {
 889                 lbs_pr_err("could not activate card\n");
 890                 goto out3;
 891         }
 892
 893         ret = 0;
 894         goto out;
 895
 896 out3:
 897         libertas_remove_card(priv);
 898 out2:
 899         ioport_unmap(card->iobase);
 900 out1:
 901         pcmcia_disable_device(p_dev);
 902 out:
 903         lbs_deb_leave_args(LBS_DEB_CS, "ret %d", ret);
 904         return ret;
 905 }
 906
 907
 908 /*
 909  * This deletes a driver "instance".  The device is de-registered with
 910  * Card Services.  If it has been released, all local data structures
 911  * are freed.  Otherwise, the structures will be freed when the device
 912  * is released.
 913  */
 914 static void if_cs_detach(struct pcmcia_device *p_dev)
 915 {
 916         struct if_cs_card *card = p_dev->priv;
 917
 918         lbs_deb_enter(LBS_DEB_CS);
 919
 920         libertas_stop_card(card->priv);
 921         libertas_remove_card(card->priv);
 922         if_cs_disable_ints(card);
 923         if_cs_release(p_dev);
 924         kfree(card);
 925
 926         lbs_deb_leave(LBS_DEB_CS);
 927 }
 928
 929
 930
 931 /********************************************************************/
 932 /* Module initialization                                            */
 933 /********************************************************************/
 934
 935 static struct pcmcia_device_id if_cs_ids[] = {
 936         PCMCIA_DEVICE_MANF_CARD(0x02df, 0x8103),
 937         PCMCIA_DEVICE_NULL,
 938 };
 939 MODULE_DEVICE_TABLE(pcmcia, if_cs_ids);
 940
 941
 942 static struct pcmcia_driver libertas_driver = {
 943         .owner          = THIS_MODULE,
 944         .drv            = {
 945                 .name   = DRV_NAME,
 946         },
 947         .probe          = if_cs_probe,
 948         .remove         = if_cs_detach,
 949         .id_table       = if_cs_ids,
 950 };
 951
 952
 953 static int __init if_cs_init(void)
 954 {
 955         int ret;
 956
 957         lbs_deb_enter(LBS_DEB_CS);
 958         ret = pcmcia_register_driver(&libertas_driver);
 959         lbs_deb_leave(LBS_DEB_CS);
 960         return ret;
 961 }
 962
 963
 964 static void __exit if_cs_exit(void)
 965 {
 966         lbs_deb_enter(LBS_DEB_CS);
 967         pcmcia_unregister_driver(&libertas_driver);
 968         lbs_deb_leave(LBS_DEB_CS);
 969 }
 970
 971
 972 module_init(if_cs_init);
 973 module_exit(if_cs_exit);