Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/net/wireless/mwifiex/sdio.c

  1 /*
  2  * Marvell Wireless LAN device driver: SDIO specific handling
  3  *
  4  * Copyright (C) 2011, Marvell International Ltd.
  5  *
  6  * This software file (the "File") is distributed by Marvell International
  7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
  8  * (the "License").  You may use, redistribute and/or modify this File in
  9  * accordance with the terms and conditions of the License, a copy of which
 10  * is available by writing to the Free Software Foundation, Inc.,
 11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 13  *
 14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 17  * this warranty disclaimer.
 18  */
 19 
 20 #include <linux/firmware.h>
 21 
 22 #include "decl.h"
 23 #include "ioctl.h"
 24 #include "util.h"
 25 #include "fw.h"
 26 #include "main.h"
 27 #include "wmm.h"
 28 #include "11n.h"
 29 #include "sdio.h"
 30 
 31 
 32 #define SDIO_VERSION    "1.0"
 33 
 34 /* The mwifiex_sdio_remove() callback function is called when
 35  * user removes this module from kernel space or ejects
 36  * the card from the slot. The driver handles these 2 cases
 37  * differently.
 38  * If the user is removing the module, the few commands (FUNC_SHUTDOWN,
 39  * HS_CANCEL etc.) are sent to the firmware.
 40  * If the card is removed, there is no need to send these command.
 41  *
 42  * The variable 'user_rmmod' is used to distinguish these two
 43  * scenarios. This flag is initialized as FALSE in case the card
 44  * is removed, and will be set to TRUE for module removal when
 45  * module_exit function is called.
 46  */
 47 static u8 user_rmmod;
 48 
 49 static struct mwifiex_if_ops sdio_ops;
 50 
 51 static struct semaphore add_remove_card_sem;
 52 
 53 /*
 54  * SDIO probe.
 55  *
 56  * This function probes an mwifiex device and registers it. It allocates
 57  * the card structure, enables SDIO function number and initiates the
 58  * device registration and initialization procedure by adding a logical
 59  * interface.
 60  */
 61 static int
 62 mwifiex_sdio_probe(struct sdio_func *func, const struct sdio_device_id *id)
 63 {
 64         int ret;
 65         struct sdio_mmc_card *card = NULL;
 66 
 67         pr_debug("info: vendor=0x%4.04X device=0x%4.04X class=%d function=%d\n",
 68                  func->vendor, func->device, func->class, func->num);
 69 
 70         card = kzalloc(sizeof(struct sdio_mmc_card), GFP_KERNEL);
 71         if (!card)
 72                 return -ENOMEM;
 73 
 74         card->func = func;
 75 
 76         func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
 77 
 78         if (id->driver_data) {
 79                 struct mwifiex_sdio_device *data = (void *)id->driver_data;
 80 
 81                 card->firmware = data->firmware;
 82                 card->reg = data->reg;
 83                 card->max_ports = data->max_ports;
 84                 card->mp_agg_pkt_limit = data->mp_agg_pkt_limit;
 85                 card->supports_sdio_new_mode = data->supports_sdio_new_mode;
 86                 card->has_control_mask = data->has_control_mask;
 87                 card->tx_buf_size = data->tx_buf_size;
 88         }
 89 
 90         sdio_claim_host(func);
 91         ret = sdio_enable_func(func);
 92         sdio_release_host(func);
 93 
 94         if (ret) {
 95                 pr_err("%s: failed to enable function\n", __func__);
 96                 kfree(card);
 97                 return -EIO;
 98         }
 99 
100         if (mwifiex_add_card(card, &add_remove_card_sem, &sdio_ops,
101                              MWIFIEX_SDIO)) {
102                 pr_err("%s: add card failed\n", __func__);
103                 kfree(card);
104                 sdio_claim_host(func);
105                 ret = sdio_disable_func(func);
106                 sdio_release_host(func);
107                 ret = -1;
108         }
109 
110         return ret;
111 }
112 
113 /*
114  * SDIO resume.
115  *
116  * Kernel needs to suspend all functions separately. Therefore all
117  * registered functions must have drivers with suspend and resume
118  * methods. Failing that the kernel simply removes the whole card.
119  *
120  * If already not resumed, this function turns on the traffic and
121  * sends a host sleep cancel request to the firmware.
122  */
123 static int mwifiex_sdio_resume(struct device *dev)
124 {
125         struct sdio_func *func = dev_to_sdio_func(dev);
126         struct sdio_mmc_card *card;
127         struct mwifiex_adapter *adapter;
128         mmc_pm_flag_t pm_flag = 0;
129 
130         if (func) {
131                 pm_flag = sdio_get_host_pm_caps(func);
132                 card = sdio_get_drvdata(func);
133                 if (!card || !card->adapter) {
134                         pr_err("resume: invalid card or adapter\n");
135                         return 0;
136                 }
137         } else {
138                 pr_err("resume: sdio_func is not specified\n");
139                 return 0;
140         }
141 
142         adapter = card->adapter;
143 
144         if (!adapter->is_suspended) {
145                 dev_warn(adapter->dev, "device already resumed\n");
146                 return 0;
147         }
148 
149         adapter->is_suspended = false;
150 
151         /* Disable Host Sleep */
152         mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
153                           MWIFIEX_ASYNC_CMD);
154 
155         return 0;
156 }
157 
158 /*
159  * SDIO remove.
160  *
161  * This function removes the interface and frees up the card structure.
162  */
163 static void
164 mwifiex_sdio_remove(struct sdio_func *func)
165 {
166         struct sdio_mmc_card *card;
167         struct mwifiex_adapter *adapter;
168         struct mwifiex_private *priv;
169 
170         pr_debug("info: SDIO func num=%d\n", func->num);
171 
172         card = sdio_get_drvdata(func);
173         if (!card)
174                 return;
175 
176         adapter = card->adapter;
177         if (!adapter || !adapter->priv_num)
178                 return;
179 
180         /* In case driver is removed when asynchronous FW load is in progress */
181         wait_for_completion(&adapter->fw_load);
182 
183         if (user_rmmod) {
184                 if (adapter->is_suspended)
185                         mwifiex_sdio_resume(adapter->dev);
186 
187                 mwifiex_deauthenticate_all(adapter);
188 
189                 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
190                 mwifiex_disable_auto_ds(priv);
191                 mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
192         }
193 
194         mwifiex_remove_card(card->adapter, &add_remove_card_sem);
195 }
196 
197 /*
198  * SDIO suspend.
199  *
200  * Kernel needs to suspend all functions separately. Therefore all
201  * registered functions must have drivers with suspend and resume
202  * methods. Failing that the kernel simply removes the whole card.
203  *
204  * If already not suspended, this function allocates and sends a host
205  * sleep activate request to the firmware and turns off the traffic.
206  */
207 static int mwifiex_sdio_suspend(struct device *dev)
208 {
209         struct sdio_func *func = dev_to_sdio_func(dev);
210         struct sdio_mmc_card *card;
211         struct mwifiex_adapter *adapter;
212         mmc_pm_flag_t pm_flag = 0;
213         int ret = 0;
214 
215         if (func) {
216                 pm_flag = sdio_get_host_pm_caps(func);
217                 pr_debug("cmd: %s: suspend: PM flag = 0x%x\n",
218                          sdio_func_id(func), pm_flag);
219                 if (!(pm_flag & MMC_PM_KEEP_POWER)) {
220                         pr_err("%s: cannot remain alive while host is"
221                                 " suspended\n", sdio_func_id(func));
222                         return -ENOSYS;
223                 }
224 
225                 card = sdio_get_drvdata(func);
226                 if (!card || !card->adapter) {
227                         pr_err("suspend: invalid card or adapter\n");
228                         return 0;
229                 }
230         } else {
231                 pr_err("suspend: sdio_func is not specified\n");
232                 return 0;
233         }
234 
235         adapter = card->adapter;
236 
237         /* Enable the Host Sleep */
238         if (!mwifiex_enable_hs(adapter)) {
239                 dev_err(adapter->dev, "cmd: failed to suspend\n");
240                 adapter->hs_enabling = false;
241                 return -EFAULT;
242         }
243 
244         dev_dbg(adapter->dev, "cmd: suspend with MMC_PM_KEEP_POWER\n");
245         ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
246 
247         /* Indicate device suspended */
248         adapter->is_suspended = true;
249         adapter->hs_enabling = false;
250 
251         return ret;
252 }
253 
254 /* Device ID for SD8786 */
255 #define SDIO_DEVICE_ID_MARVELL_8786   (0x9116)
256 /* Device ID for SD8787 */
257 #define SDIO_DEVICE_ID_MARVELL_8787   (0x9119)
258 /* Device ID for SD8797 */
259 #define SDIO_DEVICE_ID_MARVELL_8797   (0x9129)
260 /* Device ID for SD8897 */
261 #define SDIO_DEVICE_ID_MARVELL_8897   (0x912d)
262 
263 /* WLAN IDs */
264 static const struct sdio_device_id mwifiex_ids[] = {
265         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8786),
266                 .driver_data = (unsigned long) &mwifiex_sdio_sd8786},
267         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8787),
268                 .driver_data = (unsigned long) &mwifiex_sdio_sd8787},
269         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797),
270                 .driver_data = (unsigned long) &mwifiex_sdio_sd8797},
271         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8897),
272                 .driver_data = (unsigned long) &mwifiex_sdio_sd8897},
273         {},
274 };
275 
276 MODULE_DEVICE_TABLE(sdio, mwifiex_ids);
277 
278 static const struct dev_pm_ops mwifiex_sdio_pm_ops = {
279         .suspend = mwifiex_sdio_suspend,
280         .resume = mwifiex_sdio_resume,
281 };
282 
283 static struct sdio_driver mwifiex_sdio = {
284         .name = "mwifiex_sdio",
285         .id_table = mwifiex_ids,
286         .probe = mwifiex_sdio_probe,
287         .remove = mwifiex_sdio_remove,
288         .drv = {
289                 .owner = THIS_MODULE,
290                 .pm = &mwifiex_sdio_pm_ops,
291         }
292 };
293 
294 /* Write data into SDIO card register. Caller claims SDIO device. */
295 static int
296 mwifiex_write_reg_locked(struct sdio_func *func, u32 reg, u8 data)
297 {
298         int ret = -1;
299         sdio_writeb(func, data, reg, &ret);
300         return ret;
301 }
302 
303 /*
304  * This function writes data into SDIO card register.
305  */
306 static int
307 mwifiex_write_reg(struct mwifiex_adapter *adapter, u32 reg, u8 data)
308 {
309         struct sdio_mmc_card *card = adapter->card;
310         int ret;
311 
312         sdio_claim_host(card->func);
313         ret = mwifiex_write_reg_locked(card->func, reg, data);
314         sdio_release_host(card->func);
315 
316         return ret;
317 }
318 
319 /*
320  * This function reads data from SDIO card register.
321  */
322 static int
323 mwifiex_read_reg(struct mwifiex_adapter *adapter, u32 reg, u8 *data)
324 {
325         struct sdio_mmc_card *card = adapter->card;
326         int ret = -1;
327         u8 val;
328 
329         sdio_claim_host(card->func);
330         val = sdio_readb(card->func, reg, &ret);
331         sdio_release_host(card->func);
332 
333         *data = val;
334 
335         return ret;
336 }
337 
338 /*
339  * This function writes multiple data into SDIO card memory.
340  *
341  * This does not work in suspended mode.
342  */
343 static int
344 mwifiex_write_data_sync(struct mwifiex_adapter *adapter,
345                         u8 *buffer, u32 pkt_len, u32 port)
346 {
347         struct sdio_mmc_card *card = adapter->card;
348         int ret;
349         u8 blk_mode =
350                 (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE : BLOCK_MODE;
351         u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
352         u32 blk_cnt =
353                 (blk_mode ==
354                  BLOCK_MODE) ? (pkt_len /
355                                 MWIFIEX_SDIO_BLOCK_SIZE) : pkt_len;
356         u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
357 
358         if (adapter->is_suspended) {
359                 dev_err(adapter->dev,
360                         "%s: not allowed while suspended\n", __func__);
361                 return -1;
362         }
363 
364         sdio_claim_host(card->func);
365 
366         ret = sdio_writesb(card->func, ioport, buffer, blk_cnt * blk_size);
367 
368         sdio_release_host(card->func);
369 
370         return ret;
371 }
372 
373 /*
374  * This function reads multiple data from SDIO card memory.
375  */
376 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *buffer,
377                                   u32 len, u32 port, u8 claim)
378 {
379         struct sdio_mmc_card *card = adapter->card;
380         int ret;
381         u8 blk_mode = (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE
382                        : BLOCK_MODE;
383         u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
384         u32 blk_cnt = (blk_mode == BLOCK_MODE) ? (len / MWIFIEX_SDIO_BLOCK_SIZE)
385                         : len;
386         u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
387 
388         if (claim)
389                 sdio_claim_host(card->func);
390 
391         ret = sdio_readsb(card->func, buffer, ioport, blk_cnt * blk_size);
392 
393         if (claim)
394                 sdio_release_host(card->func);
395 
396         return ret;
397 }
398 
399 /*
400  * This function wakes up the card.
401  *
402  * A host power up command is written to the card configuration
403  * register to wake up the card.
404  */
405 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
406 {
407         dev_dbg(adapter->dev, "event: wakeup device...\n");
408 
409         return mwifiex_write_reg(adapter, CONFIGURATION_REG, HOST_POWER_UP);
410 }
411 
412 /*
413  * This function is called after the card has woken up.
414  *
415  * The card configuration register is reset.
416  */
417 static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
418 {
419         dev_dbg(adapter->dev, "cmd: wakeup device completed\n");
420 
421         return mwifiex_write_reg(adapter, CONFIGURATION_REG, 0);
422 }
423 
424 /*
425  * This function is used to initialize IO ports for the
426  * chipsets supporting SDIO new mode eg SD8897.
427  */
428 static int mwifiex_init_sdio_new_mode(struct mwifiex_adapter *adapter)
429 {
430         u8 reg;
431 
432         adapter->ioport = MEM_PORT;
433 
434         /* enable sdio new mode */
435         if (mwifiex_read_reg(adapter, CARD_CONFIG_2_1_REG, &reg))
436                 return -1;
437         if (mwifiex_write_reg(adapter, CARD_CONFIG_2_1_REG,
438                               reg | CMD53_NEW_MODE))
439                 return -1;
440 
441         /* Configure cmd port and enable reading rx length from the register */
442         if (mwifiex_read_reg(adapter, CMD_CONFIG_0, &reg))
443                 return -1;
444         if (mwifiex_write_reg(adapter, CMD_CONFIG_0, reg | CMD_PORT_RD_LEN_EN))
445                 return -1;
446 
447         /* Enable Dnld/Upld ready auto reset for cmd port after cmd53 is
448          * completed
449          */
450         if (mwifiex_read_reg(adapter, CMD_CONFIG_1, &reg))
451                 return -1;
452         if (mwifiex_write_reg(adapter, CMD_CONFIG_1, reg | CMD_PORT_AUTO_EN))
453                 return -1;
454 
455         return 0;
456 }
457 
458 /* This function initializes the IO ports.
459  *
460  * The following operations are performed -
461  *      - Read the IO ports (0, 1 and 2)
462  *      - Set host interrupt Reset-To-Read to clear
463  *      - Set auto re-enable interrupt
464  */
465 static int mwifiex_init_sdio_ioport(struct mwifiex_adapter *adapter)
466 {
467         u8 reg;
468         struct sdio_mmc_card *card = adapter->card;
469 
470         adapter->ioport = 0;
471 
472         if (card->supports_sdio_new_mode) {
473                 if (mwifiex_init_sdio_new_mode(adapter))
474                         return -1;
475                 goto cont;
476         }
477 
478         /* Read the IO port */
479         if (!mwifiex_read_reg(adapter, IO_PORT_0_REG, &reg))
480                 adapter->ioport |= (reg & 0xff);
481         else
482                 return -1;
483 
484         if (!mwifiex_read_reg(adapter, IO_PORT_1_REG, &reg))
485                 adapter->ioport |= ((reg & 0xff) << 8);
486         else
487                 return -1;
488 
489         if (!mwifiex_read_reg(adapter, IO_PORT_2_REG, &reg))
490                 adapter->ioport |= ((reg & 0xff) << 16);
491         else
492                 return -1;
493 cont:
494         pr_debug("info: SDIO FUNC1 IO port: %#x\n", adapter->ioport);
495 
496         /* Set Host interrupt reset to read to clear */
497         if (!mwifiex_read_reg(adapter, HOST_INT_RSR_REG, &reg))
498                 mwifiex_write_reg(adapter, HOST_INT_RSR_REG,
499                                   reg | card->reg->sdio_int_mask);
500         else
501                 return -1;
502 
503         /* Dnld/Upld ready set to auto reset */
504         if (!mwifiex_read_reg(adapter, card->reg->card_misc_cfg_reg, &reg))
505                 mwifiex_write_reg(adapter, card->reg->card_misc_cfg_reg,
506                                   reg | AUTO_RE_ENABLE_INT);
507         else
508                 return -1;
509 
510         return 0;
511 }
512 
513 /*
514  * This function sends data to the card.
515  */
516 static int mwifiex_write_data_to_card(struct mwifiex_adapter *adapter,
517                                       u8 *payload, u32 pkt_len, u32 port)
518 {
519         u32 i = 0;
520         int ret;
521 
522         do {
523                 ret = mwifiex_write_data_sync(adapter, payload, pkt_len, port);
524                 if (ret) {
525                         i++;
526                         dev_err(adapter->dev, "host_to_card, write iomem"
527                                         " (%d) failed: %d\n", i, ret);
528                         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
529                                 dev_err(adapter->dev, "write CFG reg failed\n");
530 
531                         ret = -1;
532                         if (i > MAX_WRITE_IOMEM_RETRY)
533                                 return ret;
534                 }
535         } while (ret == -1);
536 
537         return ret;
538 }
539 
540 /*
541  * This function gets the read port.
542  *
543  * If control port bit is set in MP read bitmap, the control port
544  * is returned, otherwise the current read port is returned and
545  * the value is increased (provided it does not reach the maximum
546  * limit, in which case it is reset to 1)
547  */
548 static int mwifiex_get_rd_port(struct mwifiex_adapter *adapter, u8 *port)
549 {
550         struct sdio_mmc_card *card = adapter->card;
551         const struct mwifiex_sdio_card_reg *reg = card->reg;
552         u32 rd_bitmap = card->mp_rd_bitmap;
553 
554         dev_dbg(adapter->dev, "data: mp_rd_bitmap=0x%08x\n", rd_bitmap);
555 
556         if (card->supports_sdio_new_mode) {
557                 if (!(rd_bitmap & reg->data_port_mask))
558                         return -1;
559         } else {
560                 if (!(rd_bitmap & (CTRL_PORT_MASK | reg->data_port_mask)))
561                         return -1;
562         }
563 
564         if ((card->has_control_mask) &&
565             (card->mp_rd_bitmap & CTRL_PORT_MASK)) {
566                 card->mp_rd_bitmap &= (u32) (~CTRL_PORT_MASK);
567                 *port = CTRL_PORT;
568                 dev_dbg(adapter->dev, "data: port=%d mp_rd_bitmap=0x%08x\n",
569                         *port, card->mp_rd_bitmap);
570                 return 0;
571         }
572 
573         if (!(card->mp_rd_bitmap & (1 << card->curr_rd_port)))
574                 return -1;
575 
576         /* We are now handling the SDIO data ports */
577         card->mp_rd_bitmap &= (u32)(~(1 << card->curr_rd_port));
578         *port = card->curr_rd_port;
579 
580         if (++card->curr_rd_port == card->max_ports)
581                 card->curr_rd_port = reg->start_rd_port;
582 
583         dev_dbg(adapter->dev,
584                 "data: port=%d mp_rd_bitmap=0x%08x -> 0x%08x\n",
585                 *port, rd_bitmap, card->mp_rd_bitmap);
586 
587         return 0;
588 }
589 
590 /*
591  * This function gets the write port for data.
592  *
593  * The current write port is returned if available and the value is
594  * increased (provided it does not reach the maximum limit, in which
595  * case it is reset to 1)
596  */
597 static int mwifiex_get_wr_port_data(struct mwifiex_adapter *adapter, u32 *port)
598 {
599         struct sdio_mmc_card *card = adapter->card;
600         const struct mwifiex_sdio_card_reg *reg = card->reg;
601         u32 wr_bitmap = card->mp_wr_bitmap;
602 
603         dev_dbg(adapter->dev, "data: mp_wr_bitmap=0x%08x\n", wr_bitmap);
604 
605         if (card->supports_sdio_new_mode &&
606             !(wr_bitmap & reg->data_port_mask)) {
607                 adapter->data_sent = true;
608                 return -EBUSY;
609         } else if (!card->supports_sdio_new_mode &&
610                    !(wr_bitmap & card->mp_data_port_mask)) {
611                 return -1;
612         }
613 
614         if (card->mp_wr_bitmap & (1 << card->curr_wr_port)) {
615                 card->mp_wr_bitmap &= (u32) (~(1 << card->curr_wr_port));
616                 *port = card->curr_wr_port;
617                 if (((card->supports_sdio_new_mode) &&
618                      (++card->curr_wr_port == card->max_ports)) ||
619                     ((!card->supports_sdio_new_mode) &&
620                      (++card->curr_wr_port == card->mp_end_port)))
621                         card->curr_wr_port = reg->start_wr_port;
622         } else {
623                 adapter->data_sent = true;
624                 return -EBUSY;
625         }
626 
627         if ((card->has_control_mask) && (*port == CTRL_PORT)) {
628                 dev_err(adapter->dev,
629                         "invalid data port=%d cur port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
630                         *port, card->curr_wr_port, wr_bitmap,
631                         card->mp_wr_bitmap);
632                 return -1;
633         }
634 
635         dev_dbg(adapter->dev, "data: port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
636                 *port, wr_bitmap, card->mp_wr_bitmap);
637 
638         return 0;
639 }
640 
641 /*
642  * This function polls the card status.
643  */
644 static int
645 mwifiex_sdio_poll_card_status(struct mwifiex_adapter *adapter, u8 bits)
646 {
647         struct sdio_mmc_card *card = adapter->card;
648         u32 tries;
649         u8 cs;
650 
651         for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
652                 if (mwifiex_read_reg(adapter, card->reg->poll_reg, &cs))
653                         break;
654                 else if ((cs & bits) == bits)
655                         return 0;
656 
657                 usleep_range(10, 20);
658         }
659 
660         dev_err(adapter->dev, "poll card status failed, tries = %d\n", tries);
661 
662         return -1;
663 }
664 
665 /*
666  * This function reads the firmware status.
667  */
668 static int
669 mwifiex_sdio_read_fw_status(struct mwifiex_adapter *adapter, u16 *dat)
670 {
671         struct sdio_mmc_card *card = adapter->card;
672         const struct mwifiex_sdio_card_reg *reg = card->reg;
673         u8 fws0, fws1;
674 
675         if (mwifiex_read_reg(adapter, reg->status_reg_0, &fws0))
676                 return -1;
677 
678         if (mwifiex_read_reg(adapter, reg->status_reg_1, &fws1))
679                 return -1;
680 
681         *dat = (u16) ((fws1 << 8) | fws0);
682 
683         return 0;
684 }
685 
686 /*
687  * This function disables the host interrupt.
688  *
689  * The host interrupt mask is read, the disable bit is reset and
690  * written back to the card host interrupt mask register.
691  */
692 static void mwifiex_sdio_disable_host_int(struct mwifiex_adapter *adapter)
693 {
694         struct sdio_mmc_card *card = adapter->card;
695         struct sdio_func *func = card->func;
696 
697         sdio_claim_host(func);
698         mwifiex_write_reg_locked(func, HOST_INT_MASK_REG, 0);
699         sdio_release_irq(func);
700         sdio_release_host(func);
701 }
702 
703 /*
704  * This function reads the interrupt status from card.
705  */
706 static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter)
707 {
708         struct sdio_mmc_card *card = adapter->card;
709         u8 sdio_ireg;
710         unsigned long flags;
711 
712         if (mwifiex_read_data_sync(adapter, card->mp_regs,
713                                    card->reg->max_mp_regs,
714                                    REG_PORT | MWIFIEX_SDIO_BYTE_MODE_MASK, 0)) {
715                 dev_err(adapter->dev, "read mp_regs failed\n");
716                 return;
717         }
718 
719         sdio_ireg = card->mp_regs[HOST_INTSTATUS_REG];
720         if (sdio_ireg) {
721                 /*
722                  * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
723                  * For SDIO new mode CMD port interrupts
724                  *      DN_LD_CMD_PORT_HOST_INT_STATUS and/or
725                  *      UP_LD_CMD_PORT_HOST_INT_STATUS
726                  * Clear the interrupt status register
727                  */
728                 dev_dbg(adapter->dev, "int: sdio_ireg = %#x\n", sdio_ireg);
729                 spin_lock_irqsave(&adapter->int_lock, flags);
730                 adapter->int_status |= sdio_ireg;
731                 spin_unlock_irqrestore(&adapter->int_lock, flags);
732         }
733 }
734 
735 /*
736  * SDIO interrupt handler.
737  *
738  * This function reads the interrupt status from firmware and handles
739  * the interrupt in current thread (ksdioirqd) right away.
740  */
741 static void
742 mwifiex_sdio_interrupt(struct sdio_func *func)
743 {
744         struct mwifiex_adapter *adapter;
745         struct sdio_mmc_card *card;
746 
747         card = sdio_get_drvdata(func);
748         if (!card || !card->adapter) {
749                 pr_debug("int: func=%p card=%p adapter=%p\n",
750                          func, card, card ? card->adapter : NULL);
751                 return;
752         }
753         adapter = card->adapter;
754 
755         if (!adapter->pps_uapsd_mode && adapter->ps_state == PS_STATE_SLEEP)
756                 adapter->ps_state = PS_STATE_AWAKE;
757 
758         mwifiex_interrupt_status(adapter);
759         mwifiex_main_process(adapter);
760 }
761 
762 /*
763  * This function enables the host interrupt.
764  *
765  * The host interrupt enable mask is written to the card
766  * host interrupt mask register.
767  */
768 static int mwifiex_sdio_enable_host_int(struct mwifiex_adapter *adapter)
769 {
770         struct sdio_mmc_card *card = adapter->card;
771         struct sdio_func *func = card->func;
772         int ret;
773 
774         sdio_claim_host(func);
775 
776         /* Request the SDIO IRQ */
777         ret = sdio_claim_irq(func, mwifiex_sdio_interrupt);
778         if (ret) {
779                 dev_err(adapter->dev, "claim irq failed: ret=%d\n", ret);
780                 goto out;
781         }
782 
783         /* Simply write the mask to the register */
784         ret = mwifiex_write_reg_locked(func, HOST_INT_MASK_REG,
785                                        card->reg->host_int_enable);
786         if (ret) {
787                 dev_err(adapter->dev, "enable host interrupt failed\n");
788                 sdio_release_irq(func);
789         }
790 
791 out:
792         sdio_release_host(func);
793         return ret;
794 }
795 
796 /*
797  * This function sends a data buffer to the card.
798  */
799 static int mwifiex_sdio_card_to_host(struct mwifiex_adapter *adapter,
800                                      u32 *type, u8 *buffer,
801                                      u32 npayload, u32 ioport)
802 {
803         int ret;
804         u32 nb;
805 
806         if (!buffer) {
807                 dev_err(adapter->dev, "%s: buffer is NULL\n", __func__);
808                 return -1;
809         }
810 
811         ret = mwifiex_read_data_sync(adapter, buffer, npayload, ioport, 1);
812 
813         if (ret) {
814                 dev_err(adapter->dev, "%s: read iomem failed: %d\n", __func__,
815                         ret);
816                 return -1;
817         }
818 
819         nb = le16_to_cpu(*(__le16 *) (buffer));
820         if (nb > npayload) {
821                 dev_err(adapter->dev, "%s: invalid packet, nb=%d npayload=%d\n",
822                         __func__, nb, npayload);
823                 return -1;
824         }
825 
826         *type = le16_to_cpu(*(__le16 *) (buffer + 2));
827 
828         return ret;
829 }
830 
831 /*
832  * This function downloads the firmware to the card.
833  *
834  * Firmware is downloaded to the card in blocks. Every block download
835  * is tested for CRC errors, and retried a number of times before
836  * returning failure.
837  */
838 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
839                                     struct mwifiex_fw_image *fw)
840 {
841         struct sdio_mmc_card *card = adapter->card;
842         const struct mwifiex_sdio_card_reg *reg = card->reg;
843         int ret;
844         u8 *firmware = fw->fw_buf;
845         u32 firmware_len = fw->fw_len;
846         u32 offset = 0;
847         u8 base0, base1;
848         u8 *fwbuf;
849         u16 len = 0;
850         u32 txlen, tx_blocks = 0, tries;
851         u32 i = 0;
852 
853         if (!firmware_len) {
854                 dev_err(adapter->dev,
855                         "firmware image not found! Terminating download\n");
856                 return -1;
857         }
858 
859         dev_dbg(adapter->dev, "info: downloading FW image (%d bytes)\n",
860                 firmware_len);
861 
862         /* Assume that the allocated buffer is 8-byte aligned */
863         fwbuf = kzalloc(MWIFIEX_UPLD_SIZE, GFP_KERNEL);
864         if (!fwbuf)
865                 return -ENOMEM;
866 
867         /* Perform firmware data transfer */
868         do {
869                 /* The host polls for the DN_LD_CARD_RDY and CARD_IO_READY
870                    bits */
871                 ret = mwifiex_sdio_poll_card_status(adapter, CARD_IO_READY |
872                                                     DN_LD_CARD_RDY);
873                 if (ret) {
874                         dev_err(adapter->dev, "FW download with helper:"
875                                 " poll status timeout @ %d\n", offset);
876                         goto done;
877                 }
878 
879                 /* More data? */
880                 if (offset >= firmware_len)
881                         break;
882 
883                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
884                         ret = mwifiex_read_reg(adapter, reg->base_0_reg,
885                                                &base0);
886                         if (ret) {
887                                 dev_err(adapter->dev,
888                                         "dev BASE0 register read failed: "
889                                         "base0=%#04X(%d). Terminating dnld\n",
890                                         base0, base0);
891                                 goto done;
892                         }
893                         ret = mwifiex_read_reg(adapter, reg->base_1_reg,
894                                                &base1);
895                         if (ret) {
896                                 dev_err(adapter->dev,
897                                         "dev BASE1 register read failed: "
898                                         "base1=%#04X(%d). Terminating dnld\n",
899                                         base1, base1);
900                                 goto done;
901                         }
902                         len = (u16) (((base1 & 0xff) << 8) | (base0 & 0xff));
903 
904                         if (len)
905                                 break;
906 
907                         usleep_range(10, 20);
908                 }
909 
910                 if (!len) {
911                         break;
912                 } else if (len > MWIFIEX_UPLD_SIZE) {
913                         dev_err(adapter->dev,
914                                 "FW dnld failed @ %d, invalid length %d\n",
915                                 offset, len);
916                         ret = -1;
917                         goto done;
918                 }
919 
920                 txlen = len;
921 
922                 if (len & BIT(0)) {
923                         i++;
924                         if (i > MAX_WRITE_IOMEM_RETRY) {
925                                 dev_err(adapter->dev,
926                                         "FW dnld failed @ %d, over max retry\n",
927                                         offset);
928                                 ret = -1;
929                                 goto done;
930                         }
931                         dev_err(adapter->dev, "CRC indicated by the helper:"
932                                 " len = 0x%04X, txlen = %d\n", len, txlen);
933                         len &= ~BIT(0);
934                         /* Setting this to 0 to resend from same offset */
935                         txlen = 0;
936                 } else {
937                         i = 0;
938 
939                         /* Set blocksize to transfer - checking for last
940                            block */
941                         if (firmware_len - offset < txlen)
942                                 txlen = firmware_len - offset;
943 
944                         tx_blocks = (txlen + MWIFIEX_SDIO_BLOCK_SIZE - 1)
945                                     / MWIFIEX_SDIO_BLOCK_SIZE;
946 
947                         /* Copy payload to buffer */
948                         memmove(fwbuf, &firmware[offset], txlen);
949                 }
950 
951                 ret = mwifiex_write_data_sync(adapter, fwbuf, tx_blocks *
952                                               MWIFIEX_SDIO_BLOCK_SIZE,
953                                               adapter->ioport);
954                 if (ret) {
955                         dev_err(adapter->dev,
956                                 "FW download, write iomem (%d) failed @ %d\n",
957                                 i, offset);
958                         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
959                                 dev_err(adapter->dev, "write CFG reg failed\n");
960 
961                         ret = -1;
962                         goto done;
963                 }
964 
965                 offset += txlen;
966         } while (true);
967 
968         dev_dbg(adapter->dev, "info: FW download over, size %d bytes\n",
969                 offset);
970 
971         ret = 0;
972 done:
973         kfree(fwbuf);
974         return ret;
975 }
976 
977 /*
978  * This function checks the firmware status in card.
979  *
980  * The winner interface is also determined by this function.
981  */
982 static int mwifiex_check_fw_status(struct mwifiex_adapter *adapter,
983                                    u32 poll_num)
984 {
985         struct sdio_mmc_card *card = adapter->card;
986         int ret = 0;
987         u16 firmware_stat;
988         u32 tries;
989         u8 winner_status;
990 
991         /* Wait for firmware initialization event */
992         for (tries = 0; tries < poll_num; tries++) {
993                 ret = mwifiex_sdio_read_fw_status(adapter, &firmware_stat);
994                 if (ret)
995                         continue;
996                 if (firmware_stat == FIRMWARE_READY_SDIO) {
997                         ret = 0;
998                         break;
999                 } else {
1000                         msleep(100);
1001                         ret = -1;
1002                 }
1003         }
1004 
1005         if (ret) {
1006                 if (mwifiex_read_reg
1007                     (adapter, card->reg->status_reg_0, &winner_status))
1008                         winner_status = 0;
1009 
1010                 if (winner_status)
1011                         adapter->winner = 0;
1012                 else
1013                         adapter->winner = 1;
1014         }
1015         return ret;
1016 }
1017 
1018 /*
1019  * This function decodes a received packet.
1020  *
1021  * Based on the type, the packet is treated as either a data, or
1022  * a command response, or an event, and the correct handler
1023  * function is invoked.
1024  */
1025 static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter,
1026                                     struct sk_buff *skb, u32 upld_typ)
1027 {
1028         u8 *cmd_buf;
1029         __le16 *curr_ptr = (__le16 *)skb->data;
1030         u16 pkt_len = le16_to_cpu(*curr_ptr);
1031 
1032         skb_trim(skb, pkt_len);
1033         skb_pull(skb, INTF_HEADER_LEN);
1034 
1035         switch (upld_typ) {
1036         case MWIFIEX_TYPE_DATA:
1037                 dev_dbg(adapter->dev, "info: --- Rx: Data packet ---\n");
1038                 mwifiex_handle_rx_packet(adapter, skb);
1039                 break;
1040 
1041         case MWIFIEX_TYPE_CMD:
1042                 dev_dbg(adapter->dev, "info: --- Rx: Cmd Response ---\n");
1043                 /* take care of curr_cmd = NULL case */
1044                 if (!adapter->curr_cmd) {
1045                         cmd_buf = adapter->upld_buf;
1046 
1047                         if (adapter->ps_state == PS_STATE_SLEEP_CFM)
1048                                 mwifiex_process_sleep_confirm_resp(adapter,
1049                                                                    skb->data,
1050                                                                    skb->len);
1051 
1052                         memcpy(cmd_buf, skb->data,
1053                                min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER,
1054                                      skb->len));
1055 
1056                         dev_kfree_skb_any(skb);
1057                 } else {
1058                         adapter->cmd_resp_received = true;
1059                         adapter->curr_cmd->resp_skb = skb;
1060                 }
1061                 break;
1062 
1063         case MWIFIEX_TYPE_EVENT:
1064                 dev_dbg(adapter->dev, "info: --- Rx: Event ---\n");
1065                 adapter->event_cause = le32_to_cpu(*(__le32 *) skb->data);
1066 
1067                 if ((skb->len > 0) && (skb->len  < MAX_EVENT_SIZE))
1068                         memcpy(adapter->event_body,
1069                                skb->data + MWIFIEX_EVENT_HEADER_LEN,
1070                                skb->len);
1071 
1072                 /* event cause has been saved to adapter->event_cause */
1073                 adapter->event_received = true;
1074                 adapter->event_skb = skb;
1075 
1076                 break;
1077 
1078         default:
1079                 dev_err(adapter->dev, "unknown upload type %#x\n", upld_typ);
1080                 dev_kfree_skb_any(skb);
1081                 break;
1082         }
1083 
1084         return 0;
1085 }
1086 
1087 /*
1088  * This function transfers received packets from card to driver, performing
1089  * aggregation if required.
1090  *
1091  * For data received on control port, or if aggregation is disabled, the
1092  * received buffers are uploaded as separate packets. However, if aggregation
1093  * is enabled and required, the buffers are copied onto an aggregation buffer,
1094  * provided there is space left, processed and finally uploaded.
1095  */
1096 static int mwifiex_sdio_card_to_host_mp_aggr(struct mwifiex_adapter *adapter,
1097                                              struct sk_buff *skb, u8 port)
1098 {
1099         struct sdio_mmc_card *card = adapter->card;
1100         s32 f_do_rx_aggr = 0;
1101         s32 f_do_rx_cur = 0;
1102         s32 f_aggr_cur = 0;
1103         struct sk_buff *skb_deaggr;
1104         u32 pind;
1105         u32 pkt_len, pkt_type, mport;
1106         u8 *curr_ptr;
1107         u32 rx_len = skb->len;
1108 
1109         if ((card->has_control_mask) && (port == CTRL_PORT)) {
1110                 /* Read the command Resp without aggr */
1111                 dev_dbg(adapter->dev, "info: %s: no aggregation for cmd "
1112                         "response\n", __func__);
1113 
1114                 f_do_rx_cur = 1;
1115                 goto rx_curr_single;
1116         }
1117 
1118         if (!card->mpa_rx.enabled) {
1119                 dev_dbg(adapter->dev, "info: %s: rx aggregation disabled\n",
1120                         __func__);
1121 
1122                 f_do_rx_cur = 1;
1123                 goto rx_curr_single;
1124         }
1125 
1126         if ((!card->has_control_mask && (card->mp_rd_bitmap &
1127                                          card->reg->data_port_mask)) ||
1128             (card->has_control_mask && (card->mp_rd_bitmap &
1129                                         (~((u32) CTRL_PORT_MASK))))) {
1130                 /* Some more data RX pending */
1131                 dev_dbg(adapter->dev, "info: %s: not last packet\n", __func__);
1132 
1133                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1134                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len)) {
1135                                 f_aggr_cur = 1;
1136                         } else {
1137                                 /* No room in Aggr buf, do rx aggr now */
1138                                 f_do_rx_aggr = 1;
1139                                 f_do_rx_cur = 1;
1140                         }
1141                 } else {
1142                         /* Rx aggr not in progress */
1143                         f_aggr_cur = 1;
1144                 }
1145 
1146         } else {
1147                 /* No more data RX pending */
1148                 dev_dbg(adapter->dev, "info: %s: last packet\n", __func__);
1149 
1150                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1151                         f_do_rx_aggr = 1;
1152                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len))
1153                                 f_aggr_cur = 1;
1154                         else
1155                                 /* No room in Aggr buf, do rx aggr now */
1156                                 f_do_rx_cur = 1;
1157                 } else {
1158                         f_do_rx_cur = 1;
1159                 }
1160         }
1161 
1162         if (f_aggr_cur) {
1163                 dev_dbg(adapter->dev, "info: current packet aggregation\n");
1164                 /* Curr pkt can be aggregated */
1165                 mp_rx_aggr_setup(card, skb, port);
1166 
1167                 if (MP_RX_AGGR_PKT_LIMIT_REACHED(card) ||
1168                     mp_rx_aggr_port_limit_reached(card)) {
1169                         dev_dbg(adapter->dev, "info: %s: aggregated packet "
1170                                 "limit reached\n", __func__);
1171                         /* No more pkts allowed in Aggr buf, rx it */
1172                         f_do_rx_aggr = 1;
1173                 }
1174         }
1175 
1176         if (f_do_rx_aggr) {
1177                 /* do aggr RX now */
1178                 dev_dbg(adapter->dev, "info: do_rx_aggr: num of packets: %d\n",
1179                         card->mpa_rx.pkt_cnt);
1180 
1181                 if (card->supports_sdio_new_mode) {
1182                         int i;
1183                         u32 port_count;
1184 
1185                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1186                                 if (card->mpa_rx.ports & BIT(i))
1187                                         port_count++;
1188 
1189                         /* Reading data from "start_port + 0" to "start_port +
1190                          * port_count -1", so decrease the count by 1
1191                          */
1192                         port_count--;
1193                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1194                                  (port_count << 8)) + card->mpa_rx.start_port;
1195                 } else {
1196                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1197                                  (card->mpa_rx.ports << 4)) +
1198                                  card->mpa_rx.start_port;
1199                 }
1200 
1201                 if (mwifiex_read_data_sync(adapter, card->mpa_rx.buf,
1202                                            card->mpa_rx.buf_len, mport, 1))
1203                         goto error;
1204 
1205                 curr_ptr = card->mpa_rx.buf;
1206 
1207                 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1208 
1209                         /* get curr PKT len & type */
1210                         pkt_len = le16_to_cpu(*(__le16 *) &curr_ptr[0]);
1211                         pkt_type = le16_to_cpu(*(__le16 *) &curr_ptr[2]);
1212 
1213                         /* copy pkt to deaggr buf */
1214                         skb_deaggr = card->mpa_rx.skb_arr[pind];
1215 
1216                         if ((pkt_type == MWIFIEX_TYPE_DATA) && (pkt_len <=
1217                                          card->mpa_rx.len_arr[pind])) {
1218 
1219                                 memcpy(skb_deaggr->data, curr_ptr, pkt_len);
1220 
1221                                 skb_trim(skb_deaggr, pkt_len);
1222 
1223                                 /* Process de-aggr packet */
1224                                 mwifiex_decode_rx_packet(adapter, skb_deaggr,
1225                                                          pkt_type);
1226                         } else {
1227                                 dev_err(adapter->dev, "wrong aggr pkt:"
1228                                         " type=%d len=%d max_len=%d\n",
1229                                         pkt_type, pkt_len,
1230                                         card->mpa_rx.len_arr[pind]);
1231                                 dev_kfree_skb_any(skb_deaggr);
1232                         }
1233                         curr_ptr += card->mpa_rx.len_arr[pind];
1234                 }
1235                 MP_RX_AGGR_BUF_RESET(card);
1236         }
1237 
1238 rx_curr_single:
1239         if (f_do_rx_cur) {
1240                 dev_dbg(adapter->dev, "info: RX: port: %d, rx_len: %d\n",
1241                         port, rx_len);
1242 
1243                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
1244                                               skb->data, skb->len,
1245                                               adapter->ioport + port))
1246                         goto error;
1247 
1248                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1249         }
1250 
1251         return 0;
1252 
1253 error:
1254         if (MP_RX_AGGR_IN_PROGRESS(card)) {
1255                 /* Multiport-aggregation transfer failed - cleanup */
1256                 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1257                         /* copy pkt to deaggr buf */
1258                         skb_deaggr = card->mpa_rx.skb_arr[pind];
1259                         dev_kfree_skb_any(skb_deaggr);
1260                 }
1261                 MP_RX_AGGR_BUF_RESET(card);
1262         }
1263 
1264         if (f_do_rx_cur)
1265                 /* Single transfer pending. Free curr buff also */
1266                 dev_kfree_skb_any(skb);
1267 
1268         return -1;
1269 }
1270 
1271 /*
1272  * This function checks the current interrupt status.
1273  *
1274  * The following interrupts are checked and handled by this function -
1275  *      - Data sent
1276  *      - Command sent
1277  *      - Packets received
1278  *
1279  * Since the firmware does not generate download ready interrupt if the
1280  * port updated is command port only, command sent interrupt checking
1281  * should be done manually, and for every SDIO interrupt.
1282  *
1283  * In case of Rx packets received, the packets are uploaded from card to
1284  * host and processed accordingly.
1285  */
1286 static int mwifiex_process_int_status(struct mwifiex_adapter *adapter)
1287 {
1288         struct sdio_mmc_card *card = adapter->card;
1289         const struct mwifiex_sdio_card_reg *reg = card->reg;
1290         int ret = 0;
1291         u8 sdio_ireg;
1292         struct sk_buff *skb;
1293         u8 port = CTRL_PORT;
1294         u32 len_reg_l, len_reg_u;
1295         u32 rx_blocks;
1296         u16 rx_len;
1297         unsigned long flags;
1298         u32 bitmap;
1299         u8 cr;
1300 
1301         spin_lock_irqsave(&adapter->int_lock, flags);
1302         sdio_ireg = adapter->int_status;
1303         adapter->int_status = 0;
1304         spin_unlock_irqrestore(&adapter->int_lock, flags);
1305 
1306         if (!sdio_ireg)
1307                 return ret;
1308 
1309         /* Following interrupt is only for SDIO new mode */
1310         if (sdio_ireg & DN_LD_CMD_PORT_HOST_INT_STATUS && adapter->cmd_sent)
1311                 adapter->cmd_sent = false;
1312 
1313         /* Following interrupt is only for SDIO new mode */
1314         if (sdio_ireg & UP_LD_CMD_PORT_HOST_INT_STATUS) {
1315                 u32 pkt_type;
1316 
1317                 /* read the len of control packet */
1318                 rx_len = card->mp_regs[CMD_RD_LEN_1] << 8;
1319                 rx_len |= (u16) card->mp_regs[CMD_RD_LEN_0];
1320                 rx_blocks = DIV_ROUND_UP(rx_len, MWIFIEX_SDIO_BLOCK_SIZE);
1321                 if (rx_len <= INTF_HEADER_LEN ||
1322                     (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1323                      MWIFIEX_RX_DATA_BUF_SIZE)
1324                         return -1;
1325                 rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1326 
1327                 skb = dev_alloc_skb(rx_len);
1328                 if (!skb)
1329                         return -1;
1330 
1331                 skb_put(skb, rx_len);
1332 
1333                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type, skb->data,
1334                                               skb->len, adapter->ioport |
1335                                                         CMD_PORT_SLCT)) {
1336                         dev_err(adapter->dev,
1337                                 "%s: failed to card_to_host", __func__);
1338                         dev_kfree_skb_any(skb);
1339                         goto term_cmd;
1340                 }
1341 
1342                 if ((pkt_type != MWIFIEX_TYPE_CMD) &&
1343                     (pkt_type != MWIFIEX_TYPE_EVENT))
1344                         dev_err(adapter->dev,
1345                                 "%s:Received wrong packet on cmd port",
1346                                 __func__);
1347 
1348                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1349         }
1350 
1351         if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
1352                 bitmap = (u32) card->mp_regs[reg->wr_bitmap_l];
1353                 bitmap |= ((u32) card->mp_regs[reg->wr_bitmap_u]) << 8;
1354                 if (card->supports_sdio_new_mode) {
1355                         bitmap |=
1356                                 ((u32) card->mp_regs[reg->wr_bitmap_1l]) << 16;
1357                         bitmap |=
1358                                 ((u32) card->mp_regs[reg->wr_bitmap_1u]) << 24;
1359                 }
1360                 card->mp_wr_bitmap = bitmap;
1361 
1362                 dev_dbg(adapter->dev, "int: DNLD: wr_bitmap=0x%x\n",
1363                         card->mp_wr_bitmap);
1364                 if (adapter->data_sent &&
1365                     (card->mp_wr_bitmap & card->mp_data_port_mask)) {
1366                         dev_dbg(adapter->dev,
1367                                 "info:  <--- Tx DONE Interrupt --->\n");
1368                         adapter->data_sent = false;
1369                 }
1370         }
1371 
1372         /* As firmware will not generate download ready interrupt if the port
1373            updated is command port only, cmd_sent should be done for any SDIO
1374            interrupt. */
1375         if (card->has_control_mask && adapter->cmd_sent) {
1376                 /* Check if firmware has attach buffer at command port and
1377                    update just that in wr_bit_map. */
1378                 card->mp_wr_bitmap |=
1379                         (u32) card->mp_regs[reg->wr_bitmap_l] & CTRL_PORT_MASK;
1380                 if (card->mp_wr_bitmap & CTRL_PORT_MASK)
1381                         adapter->cmd_sent = false;
1382         }
1383 
1384         dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n",
1385                 adapter->cmd_sent, adapter->data_sent);
1386         if (sdio_ireg & UP_LD_HOST_INT_STATUS) {
1387                 bitmap = (u32) card->mp_regs[reg->rd_bitmap_l];
1388                 bitmap |= ((u32) card->mp_regs[reg->rd_bitmap_u]) << 8;
1389                 if (card->supports_sdio_new_mode) {
1390                         bitmap |=
1391                                 ((u32) card->mp_regs[reg->rd_bitmap_1l]) << 16;
1392                         bitmap |=
1393                                 ((u32) card->mp_regs[reg->rd_bitmap_1u]) << 24;
1394                 }
1395                 card->mp_rd_bitmap = bitmap;
1396                 dev_dbg(adapter->dev, "int: UPLD: rd_bitmap=0x%x\n",
1397                         card->mp_rd_bitmap);
1398 
1399                 while (true) {
1400                         ret = mwifiex_get_rd_port(adapter, &port);
1401                         if (ret) {
1402                                 dev_dbg(adapter->dev,
1403                                         "info: no more rd_port available\n");
1404                                 break;
1405                         }
1406                         len_reg_l = reg->rd_len_p0_l + (port << 1);
1407                         len_reg_u = reg->rd_len_p0_u + (port << 1);
1408                         rx_len = ((u16) card->mp_regs[len_reg_u]) << 8;
1409                         rx_len |= (u16) card->mp_regs[len_reg_l];
1410                         dev_dbg(adapter->dev, "info: RX: port=%d rx_len=%u\n",
1411                                 port, rx_len);
1412                         rx_blocks =
1413                                 (rx_len + MWIFIEX_SDIO_BLOCK_SIZE -
1414                                  1) / MWIFIEX_SDIO_BLOCK_SIZE;
1415                         if (rx_len <= INTF_HEADER_LEN ||
1416                             (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1417                              MWIFIEX_RX_DATA_BUF_SIZE) {
1418                                 dev_err(adapter->dev, "invalid rx_len=%d\n",
1419                                         rx_len);
1420                                 return -1;
1421                         }
1422                         rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1423 
1424                         skb = dev_alloc_skb(rx_len);
1425 
1426                         if (!skb) {
1427                                 dev_err(adapter->dev, "%s: failed to alloc skb",
1428                                         __func__);
1429                                 return -1;
1430                         }
1431 
1432                         skb_put(skb, rx_len);
1433 
1434                         dev_dbg(adapter->dev, "info: rx_len = %d skb->len = %d\n",
1435                                 rx_len, skb->len);
1436 
1437                         if (mwifiex_sdio_card_to_host_mp_aggr(adapter, skb,
1438                                                               port)) {
1439                                 dev_err(adapter->dev, "card_to_host_mpa failed:"
1440                                         " int status=%#x\n", sdio_ireg);
1441                                 goto term_cmd;
1442                         }
1443                 }
1444         }
1445 
1446         return 0;
1447 
1448 term_cmd:
1449         /* terminate cmd */
1450         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1451                 dev_err(adapter->dev, "read CFG reg failed\n");
1452         else
1453                 dev_dbg(adapter->dev, "info: CFG reg val = %d\n", cr);
1454 
1455         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, (cr | 0x04)))
1456                 dev_err(adapter->dev, "write CFG reg failed\n");
1457         else
1458                 dev_dbg(adapter->dev, "info: write success\n");
1459 
1460         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1461                 dev_err(adapter->dev, "read CFG reg failed\n");
1462         else
1463                 dev_dbg(adapter->dev, "info: CFG reg val =%x\n", cr);
1464 
1465         return -1;
1466 }
1467 
1468 /*
1469  * This function aggregates transmission buffers in driver and downloads
1470  * the aggregated packet to card.
1471  *
1472  * The individual packets are aggregated by copying into an aggregation
1473  * buffer and then downloaded to the card. Previous unsent packets in the
1474  * aggregation buffer are pre-copied first before new packets are added.
1475  * Aggregation is done till there is space left in the aggregation buffer,
1476  * or till new packets are available.
1477  *
1478  * The function will only download the packet to the card when aggregation
1479  * stops, otherwise it will just aggregate the packet in aggregation buffer
1480  * and return.
1481  */
1482 static int mwifiex_host_to_card_mp_aggr(struct mwifiex_adapter *adapter,
1483                                         u8 *payload, u32 pkt_len, u32 port,
1484                                         u32 next_pkt_len)
1485 {
1486         struct sdio_mmc_card *card = adapter->card;
1487         int ret = 0;
1488         s32 f_send_aggr_buf = 0;
1489         s32 f_send_cur_buf = 0;
1490         s32 f_precopy_cur_buf = 0;
1491         s32 f_postcopy_cur_buf = 0;
1492         u32 mport;
1493 
1494         if (!card->mpa_tx.enabled ||
1495             (card->has_control_mask && (port == CTRL_PORT)) ||
1496             (card->supports_sdio_new_mode && (port == CMD_PORT_SLCT))) {
1497                 dev_dbg(adapter->dev, "info: %s: tx aggregation disabled\n",
1498                         __func__);
1499 
1500                 f_send_cur_buf = 1;
1501                 goto tx_curr_single;
1502         }
1503 
1504         if (next_pkt_len) {
1505                 /* More pkt in TX queue */
1506                 dev_dbg(adapter->dev, "info: %s: more packets in queue.\n",
1507                         __func__);
1508 
1509                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1510                         if (!mp_tx_aggr_port_limit_reached(card) &&
1511                             MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len)) {
1512                                 f_precopy_cur_buf = 1;
1513 
1514                                 if (!(card->mp_wr_bitmap &
1515                                       (1 << card->curr_wr_port)) ||
1516                                     !MP_TX_AGGR_BUF_HAS_ROOM(
1517                                             card, pkt_len + next_pkt_len))
1518                                         f_send_aggr_buf = 1;
1519                         } else {
1520                                 /* No room in Aggr buf, send it */
1521                                 f_send_aggr_buf = 1;
1522 
1523                                 if (mp_tx_aggr_port_limit_reached(card) ||
1524                                     !(card->mp_wr_bitmap &
1525                                       (1 << card->curr_wr_port)))
1526                                         f_send_cur_buf = 1;
1527                                 else
1528                                         f_postcopy_cur_buf = 1;
1529                         }
1530                 } else {
1531                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len) &&
1532                             (card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1533                                 f_precopy_cur_buf = 1;
1534                         else
1535                                 f_send_cur_buf = 1;
1536                 }
1537         } else {
1538                 /* Last pkt in TX queue */
1539                 dev_dbg(adapter->dev, "info: %s: Last packet in Tx Queue.\n",
1540                         __func__);
1541 
1542                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1543                         /* some packs in Aggr buf already */
1544                         f_send_aggr_buf = 1;
1545 
1546                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len))
1547                                 f_precopy_cur_buf = 1;
1548                         else
1549                                 /* No room in Aggr buf, send it */
1550                                 f_send_cur_buf = 1;
1551                 } else {
1552                         f_send_cur_buf = 1;
1553                 }
1554         }
1555 
1556         if (f_precopy_cur_buf) {
1557                 dev_dbg(adapter->dev, "data: %s: precopy current buffer\n",
1558                         __func__);
1559                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1560 
1561                 if (MP_TX_AGGR_PKT_LIMIT_REACHED(card) ||
1562                     mp_tx_aggr_port_limit_reached(card))
1563                         /* No more pkts allowed in Aggr buf, send it */
1564                         f_send_aggr_buf = 1;
1565         }
1566 
1567         if (f_send_aggr_buf) {
1568                 dev_dbg(adapter->dev, "data: %s: send aggr buffer: %d %d\n",
1569                         __func__,
1570                                 card->mpa_tx.start_port, card->mpa_tx.ports);
1571                 if (card->supports_sdio_new_mode) {
1572                         u32 port_count;
1573                         int i;
1574 
1575                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1576                                 if (card->mpa_tx.ports & BIT(i))
1577                                         port_count++;
1578 
1579                         /* Writing data from "start_port + 0" to "start_port +
1580                          * port_count -1", so decrease the count by 1
1581                          */
1582                         port_count--;
1583                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1584                                  (port_count << 8)) + card->mpa_tx.start_port;
1585                 } else {
1586                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1587                                  (card->mpa_tx.ports << 4)) +
1588                                  card->mpa_tx.start_port;
1589                 }
1590 
1591                 ret = mwifiex_write_data_to_card(adapter, card->mpa_tx.buf,
1592                                                  card->mpa_tx.buf_len, mport);
1593 
1594                 MP_TX_AGGR_BUF_RESET(card);
1595         }
1596 
1597 tx_curr_single:
1598         if (f_send_cur_buf) {
1599                 dev_dbg(adapter->dev, "data: %s: send current buffer %d\n",
1600                         __func__, port);
1601                 ret = mwifiex_write_data_to_card(adapter, payload, pkt_len,
1602                                                  adapter->ioport + port);
1603         }
1604 
1605         if (f_postcopy_cur_buf) {
1606                 dev_dbg(adapter->dev, "data: %s: postcopy current buffer\n",
1607                         __func__);
1608                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1609         }
1610 
1611         return ret;
1612 }
1613 
1614 /*
1615  * This function downloads data from driver to card.
1616  *
1617  * Both commands and data packets are transferred to the card by this
1618  * function.
1619  *
1620  * This function adds the SDIO specific header to the front of the buffer
1621  * before transferring. The header contains the length of the packet and
1622  * the type. The firmware handles the packets based upon this set type.
1623  */
1624 static int mwifiex_sdio_host_to_card(struct mwifiex_adapter *adapter,
1625                                      u8 type, struct sk_buff *skb,
1626                                      struct mwifiex_tx_param *tx_param)
1627 {
1628         struct sdio_mmc_card *card = adapter->card;
1629         int ret;
1630         u32 buf_block_len;
1631         u32 blk_size;
1632         u32 port = CTRL_PORT;
1633         u8 *payload = (u8 *)skb->data;
1634         u32 pkt_len = skb->len;
1635 
1636         /* Allocate buffer and copy payload */
1637         blk_size = MWIFIEX_SDIO_BLOCK_SIZE;
1638         buf_block_len = (pkt_len + blk_size - 1) / blk_size;
1639         *(__le16 *)&payload[0] = cpu_to_le16((u16)pkt_len);
1640         *(__le16 *)&payload[2] = cpu_to_le16(type);
1641 
1642         /*
1643          * This is SDIO specific header
1644          *  u16 length,
1645          *  u16 type (MWIFIEX_TYPE_DATA = 0, MWIFIEX_TYPE_CMD = 1,
1646          *  MWIFIEX_TYPE_EVENT = 3)
1647          */
1648         if (type == MWIFIEX_TYPE_DATA) {
1649                 ret = mwifiex_get_wr_port_data(adapter, &port);
1650                 if (ret) {
1651                         dev_err(adapter->dev, "%s: no wr_port available\n",
1652                                 __func__);
1653                         return ret;
1654                 }
1655         } else {
1656                 adapter->cmd_sent = true;
1657                 /* Type must be MWIFIEX_TYPE_CMD */
1658 
1659                 if (pkt_len <= INTF_HEADER_LEN ||
1660                     pkt_len > MWIFIEX_UPLD_SIZE)
1661                         dev_err(adapter->dev, "%s: payload=%p, nb=%d\n",
1662                                 __func__, payload, pkt_len);
1663 
1664                 if (card->supports_sdio_new_mode)
1665                         port = CMD_PORT_SLCT;
1666         }
1667 
1668         /* Transfer data to card */
1669         pkt_len = buf_block_len * blk_size;
1670 
1671         if (tx_param)
1672                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1673                                                    port, tx_param->next_pkt_len
1674                                                    );
1675         else
1676                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1677                                                    port, 0);
1678 
1679         if (ret) {
1680                 if (type == MWIFIEX_TYPE_CMD)
1681                         adapter->cmd_sent = false;
1682                 if (type == MWIFIEX_TYPE_DATA)
1683                         adapter->data_sent = false;
1684         } else {
1685                 if (type == MWIFIEX_TYPE_DATA) {
1686                         if (!(card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1687                                 adapter->data_sent = true;
1688                         else
1689                                 adapter->data_sent = false;
1690                 }
1691         }
1692 
1693         return ret;
1694 }
1695 
1696 /*
1697  * This function allocates the MPA Tx and Rx buffers.
1698  */
1699 static int mwifiex_alloc_sdio_mpa_buffers(struct mwifiex_adapter *adapter,
1700                                    u32 mpa_tx_buf_size, u32 mpa_rx_buf_size)
1701 {
1702         struct sdio_mmc_card *card = adapter->card;
1703         int ret = 0;
1704 
1705         card->mpa_tx.buf = kzalloc(mpa_tx_buf_size, GFP_KERNEL);
1706         if (!card->mpa_tx.buf) {
1707                 ret = -1;
1708                 goto error;
1709         }
1710 
1711         card->mpa_tx.buf_size = mpa_tx_buf_size;
1712 
1713         card->mpa_rx.buf = kzalloc(mpa_rx_buf_size, GFP_KERNEL);
1714         if (!card->mpa_rx.buf) {
1715                 ret = -1;
1716                 goto error;
1717         }
1718 
1719         card->mpa_rx.buf_size = mpa_rx_buf_size;
1720 
1721 error:
1722         if (ret) {
1723                 kfree(card->mpa_tx.buf);
1724                 kfree(card->mpa_rx.buf);
1725         }
1726 
1727         return ret;
1728 }
1729 
1730 /*
1731  * This function unregisters the SDIO device.
1732  *
1733  * The SDIO IRQ is released, the function is disabled and driver
1734  * data is set to null.
1735  */
1736 static void
1737 mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
1738 {
1739         struct sdio_mmc_card *card = adapter->card;
1740 
1741         if (adapter->card) {
1742                 sdio_claim_host(card->func);
1743                 sdio_disable_func(card->func);
1744                 sdio_release_host(card->func);
1745         }
1746 }
1747 
1748 /*
1749  * This function registers the SDIO device.
1750  *
1751  * SDIO IRQ is claimed, block size is set and driver data is initialized.
1752  */
1753 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
1754 {
1755         int ret;
1756         struct sdio_mmc_card *card = adapter->card;
1757         struct sdio_func *func = card->func;
1758 
1759         /* save adapter pointer in card */
1760         card->adapter = adapter;
1761         adapter->tx_buf_size = card->tx_buf_size;
1762 
1763         sdio_claim_host(func);
1764 
1765         /* Set block size */
1766         ret = sdio_set_block_size(card->func, MWIFIEX_SDIO_BLOCK_SIZE);
1767         sdio_release_host(func);
1768         if (ret) {
1769                 pr_err("cannot set SDIO block size\n");
1770                 return ret;
1771         }
1772 
1773 
1774         adapter->dev = &func->dev;
1775 
1776         strcpy(adapter->fw_name, card->firmware);
1777 
1778         return 0;
1779 }
1780 
1781 /*
1782  * This function initializes the SDIO driver.
1783  *
1784  * The following initializations steps are followed -
1785  *      - Read the Host interrupt status register to acknowledge
1786  *        the first interrupt got from bootloader
1787  *      - Disable host interrupt mask register
1788  *      - Get SDIO port
1789  *      - Initialize SDIO variables in card
1790  *      - Allocate MP registers
1791  *      - Allocate MPA Tx and Rx buffers
1792  */
1793 static int mwifiex_init_sdio(struct mwifiex_adapter *adapter)
1794 {
1795         struct sdio_mmc_card *card = adapter->card;
1796         const struct mwifiex_sdio_card_reg *reg = card->reg;
1797         int ret;
1798         u8 sdio_ireg;
1799 
1800         sdio_set_drvdata(card->func, card);
1801 
1802         /*
1803          * Read the HOST_INT_STATUS_REG for ACK the first interrupt got
1804          * from the bootloader. If we don't do this we get a interrupt
1805          * as soon as we register the irq.
1806          */
1807         mwifiex_read_reg(adapter, HOST_INTSTATUS_REG, &sdio_ireg);
1808 
1809         /* Get SDIO ioport */
1810         mwifiex_init_sdio_ioport(adapter);
1811 
1812         /* Initialize SDIO variables in card */
1813         card->mp_rd_bitmap = 0;
1814         card->mp_wr_bitmap = 0;
1815         card->curr_rd_port = reg->start_rd_port;
1816         card->curr_wr_port = reg->start_wr_port;
1817 
1818         card->mp_data_port_mask = reg->data_port_mask;
1819 
1820         card->mpa_tx.buf_len = 0;
1821         card->mpa_tx.pkt_cnt = 0;
1822         card->mpa_tx.start_port = 0;
1823 
1824         card->mpa_tx.enabled = 1;
1825         card->mpa_tx.pkt_aggr_limit = card->mp_agg_pkt_limit;
1826 
1827         card->mpa_rx.buf_len = 0;
1828         card->mpa_rx.pkt_cnt = 0;
1829         card->mpa_rx.start_port = 0;
1830 
1831         card->mpa_rx.enabled = 1;
1832         card->mpa_rx.pkt_aggr_limit = card->mp_agg_pkt_limit;
1833 
1834         /* Allocate buffers for SDIO MP-A */
1835         card->mp_regs = kzalloc(reg->max_mp_regs, GFP_KERNEL);
1836         if (!card->mp_regs)
1837                 return -ENOMEM;
1838 
1839         /* Allocate skb pointer buffers */
1840         card->mpa_rx.skb_arr = kzalloc((sizeof(void *)) *
1841                                        card->mp_agg_pkt_limit, GFP_KERNEL);
1842         card->mpa_rx.len_arr = kzalloc(sizeof(*card->mpa_rx.len_arr) *
1843                                        card->mp_agg_pkt_limit, GFP_KERNEL);
1844         ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
1845                                              SDIO_MP_TX_AGGR_DEF_BUF_SIZE,
1846                                              SDIO_MP_RX_AGGR_DEF_BUF_SIZE);
1847         if (ret) {
1848                 dev_err(adapter->dev, "failed to alloc sdio mp-a buffers\n");
1849                 kfree(card->mp_regs);
1850                 return -1;
1851         }
1852 
1853         return ret;
1854 }
1855 
1856 /*
1857  * This function resets the MPA Tx and Rx buffers.
1858  */
1859 static void mwifiex_cleanup_mpa_buf(struct mwifiex_adapter *adapter)
1860 {
1861         struct sdio_mmc_card *card = adapter->card;
1862 
1863         MP_TX_AGGR_BUF_RESET(card);
1864         MP_RX_AGGR_BUF_RESET(card);
1865 }
1866 
1867 /*
1868  * This function cleans up the allocated card buffers.
1869  *
1870  * The following are freed by this function -
1871  *      - MP registers
1872  *      - MPA Tx buffer
1873  *      - MPA Rx buffer
1874  */
1875 static void mwifiex_cleanup_sdio(struct mwifiex_adapter *adapter)
1876 {
1877         struct sdio_mmc_card *card = adapter->card;
1878 
1879         kfree(card->mp_regs);
1880         kfree(card->mpa_rx.skb_arr);
1881         kfree(card->mpa_rx.len_arr);
1882         kfree(card->mpa_tx.buf);
1883         kfree(card->mpa_rx.buf);
1884         sdio_set_drvdata(card->func, NULL);
1885         kfree(card);
1886 }
1887 
1888 /*
1889  * This function updates the MP end port in card.
1890  */
1891 static void
1892 mwifiex_update_mp_end_port(struct mwifiex_adapter *adapter, u16 port)
1893 {
1894         struct sdio_mmc_card *card = adapter->card;
1895         const struct mwifiex_sdio_card_reg *reg = card->reg;
1896         int i;
1897 
1898         card->mp_end_port = port;
1899 
1900         card->mp_data_port_mask = reg->data_port_mask;
1901 
1902         if (reg->start_wr_port) {
1903                 for (i = 1; i <= card->max_ports - card->mp_end_port; i++)
1904                         card->mp_data_port_mask &=
1905                                         ~(1 << (card->max_ports - i));
1906         }
1907 
1908         card->curr_wr_port = reg->start_wr_port;
1909 
1910         dev_dbg(adapter->dev, "cmd: mp_end_port %d, data port mask 0x%x\n",
1911                 port, card->mp_data_port_mask);
1912 }
1913 
1914 static struct mmc_host *reset_host;
1915 static void sdio_card_reset_worker(struct work_struct *work)
1916 {
1917         struct mmc_host *target = reset_host;
1918 
1919         /* The actual reset operation must be run outside of driver thread.
1920          * This is because mmc_remove_host() will cause the device to be
1921          * instantly destroyed, and the driver then needs to end its thread,
1922          * leading to a deadlock.
1923          *
1924          * We run it in a totally independent workqueue.
1925          */
1926 
1927         pr_err("Resetting card...\n");
1928         mmc_remove_host(target);
1929         /* 20ms delay is based on experiment with sdhci controller */
1930         mdelay(20);
1931         mmc_add_host(target);
1932 }
1933 static DECLARE_WORK(card_reset_work, sdio_card_reset_worker);
1934 
1935 /* This function resets the card */
1936 static void mwifiex_sdio_card_reset(struct mwifiex_adapter *adapter)
1937 {
1938         struct sdio_mmc_card *card = adapter->card;
1939 
1940         reset_host = card->func->card->host;
1941         schedule_work(&card_reset_work);
1942 }
1943 
1944 static struct mwifiex_if_ops sdio_ops = {
1945         .init_if = mwifiex_init_sdio,
1946         .cleanup_if = mwifiex_cleanup_sdio,
1947         .check_fw_status = mwifiex_check_fw_status,
1948         .prog_fw = mwifiex_prog_fw_w_helper,
1949         .register_dev = mwifiex_register_dev,
1950         .unregister_dev = mwifiex_unregister_dev,
1951         .enable_int = mwifiex_sdio_enable_host_int,
1952         .disable_int = mwifiex_sdio_disable_host_int,
1953         .process_int_status = mwifiex_process_int_status,
1954         .host_to_card = mwifiex_sdio_host_to_card,
1955         .wakeup = mwifiex_pm_wakeup_card,
1956         .wakeup_complete = mwifiex_pm_wakeup_card_complete,
1957 
1958         /* SDIO specific */
1959         .update_mp_end_port = mwifiex_update_mp_end_port,
1960         .cleanup_mpa_buf = mwifiex_cleanup_mpa_buf,
1961         .cmdrsp_complete = mwifiex_sdio_cmdrsp_complete,
1962         .event_complete = mwifiex_sdio_event_complete,
1963         .card_reset = mwifiex_sdio_card_reset,
1964 };
1965 
1966 /*
1967  * This function initializes the SDIO driver.
1968  *
1969  * This initiates the semaphore and registers the device with
1970  * SDIO bus.
1971  */
1972 static int
1973 mwifiex_sdio_init_module(void)
1974 {
1975         sema_init(&add_remove_card_sem, 1);
1976 
1977         /* Clear the flag in case user removes the card. */
1978         user_rmmod = 0;
1979 
1980         return sdio_register_driver(&mwifiex_sdio);
1981 }
1982 
1983 /*
1984  * This function cleans up the SDIO driver.
1985  *
1986  * The following major steps are followed for cleanup -
1987  *      - Resume the device if its suspended
1988  *      - Disconnect the device if connected
1989  *      - Shutdown the firmware
1990  *      - Unregister the device from SDIO bus.
1991  */
1992 static void
1993 mwifiex_sdio_cleanup_module(void)
1994 {
1995         if (!down_interruptible(&add_remove_card_sem))
1996                 up(&add_remove_card_sem);
1997 
1998         /* Set the flag as user is removing this module. */
1999         user_rmmod = 1;
2000 
2001         cancel_work_sync(&card_reset_work);
2002         sdio_unregister_driver(&mwifiex_sdio);
2003 }
2004 
2005 module_init(mwifiex_sdio_init_module);
2006 module_exit(mwifiex_sdio_cleanup_module);
2007 
2008 MODULE_AUTHOR("Marvell International Ltd.");
2009 MODULE_DESCRIPTION("Marvell WiFi-Ex SDIO Driver version " SDIO_VERSION);
2010 MODULE_VERSION(SDIO_VERSION);
2011 MODULE_LICENSE("GPL v2");
2012 MODULE_FIRMWARE(SD8786_DEFAULT_FW_NAME);
2013 MODULE_FIRMWARE(SD8787_DEFAULT_FW_NAME);
2014 MODULE_FIRMWARE(SD8797_DEFAULT_FW_NAME);
2015 MODULE_FIRMWARE(SD8897_DEFAULT_FW_NAME);
2016 

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