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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         }
 88 
 89         sdio_claim_host(func);
 90         ret = sdio_enable_func(func);
 91         sdio_release_host(func);
 92 
 93         if (ret) {
 94                 pr_err("%s: failed to enable function\n", __func__);
 95                 kfree(card);
 96                 return -EIO;
 97         }
 98 
 99         if (mwifiex_add_card(card, &add_remove_card_sem, &sdio_ops,
100                              MWIFIEX_SDIO)) {
101                 pr_err("%s: add card failed\n", __func__);
102                 kfree(card);
103                 sdio_claim_host(func);
104                 ret = sdio_disable_func(func);
105                 sdio_release_host(func);
106                 ret = -1;
107         }
108 
109         return ret;
110 }
111 
112 /*
113  * SDIO resume.
114  *
115  * Kernel needs to suspend all functions separately. Therefore all
116  * registered functions must have drivers with suspend and resume
117  * methods. Failing that the kernel simply removes the whole card.
118  *
119  * If already not resumed, this function turns on the traffic and
120  * sends a host sleep cancel request to the firmware.
121  */
122 static int mwifiex_sdio_resume(struct device *dev)
123 {
124         struct sdio_func *func = dev_to_sdio_func(dev);
125         struct sdio_mmc_card *card;
126         struct mwifiex_adapter *adapter;
127         mmc_pm_flag_t pm_flag = 0;
128 
129         if (func) {
130                 pm_flag = sdio_get_host_pm_caps(func);
131                 card = sdio_get_drvdata(func);
132                 if (!card || !card->adapter) {
133                         pr_err("resume: invalid card or adapter\n");
134                         return 0;
135                 }
136         } else {
137                 pr_err("resume: sdio_func is not specified\n");
138                 return 0;
139         }
140 
141         adapter = card->adapter;
142 
143         if (!adapter->is_suspended) {
144                 dev_warn(adapter->dev, "device already resumed\n");
145                 return 0;
146         }
147 
148         adapter->is_suspended = false;
149 
150         /* Disable Host Sleep */
151         mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
152                           MWIFIEX_ASYNC_CMD);
153 
154         return 0;
155 }
156 
157 /*
158  * SDIO remove.
159  *
160  * This function removes the interface and frees up the card structure.
161  */
162 static void
163 mwifiex_sdio_remove(struct sdio_func *func)
164 {
165         struct sdio_mmc_card *card;
166         struct mwifiex_adapter *adapter;
167         struct mwifiex_private *priv;
168         int i;
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                 for (i = 0; i < adapter->priv_num; i++)
188                         if ((GET_BSS_ROLE(adapter->priv[i]) ==
189                                                 MWIFIEX_BSS_ROLE_STA) &&
190                             adapter->priv[i]->media_connected)
191                                 mwifiex_deauthenticate(adapter->priv[i], NULL);
192 
193                 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
194                 mwifiex_disable_auto_ds(priv);
195                 mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
196         }
197 
198         mwifiex_remove_card(card->adapter, &add_remove_card_sem);
199 }
200 
201 /*
202  * SDIO suspend.
203  *
204  * Kernel needs to suspend all functions separately. Therefore all
205  * registered functions must have drivers with suspend and resume
206  * methods. Failing that the kernel simply removes the whole card.
207  *
208  * If already not suspended, this function allocates and sends a host
209  * sleep activate request to the firmware and turns off the traffic.
210  */
211 static int mwifiex_sdio_suspend(struct device *dev)
212 {
213         struct sdio_func *func = dev_to_sdio_func(dev);
214         struct sdio_mmc_card *card;
215         struct mwifiex_adapter *adapter;
216         mmc_pm_flag_t pm_flag = 0;
217         int ret = 0;
218 
219         if (func) {
220                 pm_flag = sdio_get_host_pm_caps(func);
221                 pr_debug("cmd: %s: suspend: PM flag = 0x%x\n",
222                          sdio_func_id(func), pm_flag);
223                 if (!(pm_flag & MMC_PM_KEEP_POWER)) {
224                         pr_err("%s: cannot remain alive while host is"
225                                 " suspended\n", sdio_func_id(func));
226                         return -ENOSYS;
227                 }
228 
229                 card = sdio_get_drvdata(func);
230                 if (!card || !card->adapter) {
231                         pr_err("suspend: invalid card or adapter\n");
232                         return 0;
233                 }
234         } else {
235                 pr_err("suspend: sdio_func is not specified\n");
236                 return 0;
237         }
238 
239         adapter = card->adapter;
240 
241         /* Enable the Host Sleep */
242         if (!mwifiex_enable_hs(adapter)) {
243                 dev_err(adapter->dev, "cmd: failed to suspend\n");
244                 return -EFAULT;
245         }
246 
247         dev_dbg(adapter->dev, "cmd: suspend with MMC_PM_KEEP_POWER\n");
248         ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
249 
250         /* Indicate device suspended */
251         adapter->is_suspended = true;
252 
253         return ret;
254 }
255 
256 /* Device ID for SD8786 */
257 #define SDIO_DEVICE_ID_MARVELL_8786   (0x9116)
258 /* Device ID for SD8787 */
259 #define SDIO_DEVICE_ID_MARVELL_8787   (0x9119)
260 /* Device ID for SD8797 */
261 #define SDIO_DEVICE_ID_MARVELL_8797   (0x9129)
262 /* Device ID for SD8897 */
263 #define SDIO_DEVICE_ID_MARVELL_8897   (0x912d)
264 
265 /* WLAN IDs */
266 static const struct sdio_device_id mwifiex_ids[] = {
267         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8786),
268                 .driver_data = (unsigned long) &mwifiex_sdio_sd8786},
269         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8787),
270                 .driver_data = (unsigned long) &mwifiex_sdio_sd8787},
271         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797),
272                 .driver_data = (unsigned long) &mwifiex_sdio_sd8797},
273         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8897),
274                 .driver_data = (unsigned long) &mwifiex_sdio_sd8897},
275         {},
276 };
277 
278 MODULE_DEVICE_TABLE(sdio, mwifiex_ids);
279 
280 static const struct dev_pm_ops mwifiex_sdio_pm_ops = {
281         .suspend = mwifiex_sdio_suspend,
282         .resume = mwifiex_sdio_resume,
283 };
284 
285 static struct sdio_driver mwifiex_sdio = {
286         .name = "mwifiex_sdio",
287         .id_table = mwifiex_ids,
288         .probe = mwifiex_sdio_probe,
289         .remove = mwifiex_sdio_remove,
290         .drv = {
291                 .owner = THIS_MODULE,
292                 .pm = &mwifiex_sdio_pm_ops,
293         }
294 };
295 
296 /* Write data into SDIO card register. Caller claims SDIO device. */
297 static int
298 mwifiex_write_reg_locked(struct sdio_func *func, u32 reg, u8 data)
299 {
300         int ret = -1;
301         sdio_writeb(func, data, reg, &ret);
302         return ret;
303 }
304 
305 /*
306  * This function writes data into SDIO card register.
307  */
308 static int
309 mwifiex_write_reg(struct mwifiex_adapter *adapter, u32 reg, u8 data)
310 {
311         struct sdio_mmc_card *card = adapter->card;
312         int ret;
313 
314         sdio_claim_host(card->func);
315         ret = mwifiex_write_reg_locked(card->func, reg, data);
316         sdio_release_host(card->func);
317 
318         return ret;
319 }
320 
321 /*
322  * This function reads data from SDIO card register.
323  */
324 static int
325 mwifiex_read_reg(struct mwifiex_adapter *adapter, u32 reg, u8 *data)
326 {
327         struct sdio_mmc_card *card = adapter->card;
328         int ret = -1;
329         u8 val;
330 
331         sdio_claim_host(card->func);
332         val = sdio_readb(card->func, reg, &ret);
333         sdio_release_host(card->func);
334 
335         *data = val;
336 
337         return ret;
338 }
339 
340 /*
341  * This function writes multiple data into SDIO card memory.
342  *
343  * This does not work in suspended mode.
344  */
345 static int
346 mwifiex_write_data_sync(struct mwifiex_adapter *adapter,
347                         u8 *buffer, u32 pkt_len, u32 port)
348 {
349         struct sdio_mmc_card *card = adapter->card;
350         int ret;
351         u8 blk_mode =
352                 (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE : BLOCK_MODE;
353         u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
354         u32 blk_cnt =
355                 (blk_mode ==
356                  BLOCK_MODE) ? (pkt_len /
357                                 MWIFIEX_SDIO_BLOCK_SIZE) : pkt_len;
358         u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
359 
360         if (adapter->is_suspended) {
361                 dev_err(adapter->dev,
362                         "%s: not allowed while suspended\n", __func__);
363                 return -1;
364         }
365 
366         sdio_claim_host(card->func);
367 
368         ret = sdio_writesb(card->func, ioport, buffer, blk_cnt * blk_size);
369 
370         sdio_release_host(card->func);
371 
372         return ret;
373 }
374 
375 /*
376  * This function reads multiple data from SDIO card memory.
377  */
378 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *buffer,
379                                   u32 len, u32 port, u8 claim)
380 {
381         struct sdio_mmc_card *card = adapter->card;
382         int ret;
383         u8 blk_mode = (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE
384                        : BLOCK_MODE;
385         u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
386         u32 blk_cnt = (blk_mode == BLOCK_MODE) ? (len / MWIFIEX_SDIO_BLOCK_SIZE)
387                         : len;
388         u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
389 
390         if (claim)
391                 sdio_claim_host(card->func);
392 
393         ret = sdio_readsb(card->func, buffer, ioport, blk_cnt * blk_size);
394 
395         if (claim)
396                 sdio_release_host(card->func);
397 
398         return ret;
399 }
400 
401 /*
402  * This function wakes up the card.
403  *
404  * A host power up command is written to the card configuration
405  * register to wake up the card.
406  */
407 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
408 {
409         dev_dbg(adapter->dev, "event: wakeup device...\n");
410 
411         return mwifiex_write_reg(adapter, CONFIGURATION_REG, HOST_POWER_UP);
412 }
413 
414 /*
415  * This function is called after the card has woken up.
416  *
417  * The card configuration register is reset.
418  */
419 static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
420 {
421         dev_dbg(adapter->dev, "cmd: wakeup device completed\n");
422 
423         return mwifiex_write_reg(adapter, CONFIGURATION_REG, 0);
424 }
425 
426 /*
427  * This function is used to initialize IO ports for the
428  * chipsets supporting SDIO new mode eg SD8897.
429  */
430 static int mwifiex_init_sdio_new_mode(struct mwifiex_adapter *adapter)
431 {
432         u8 reg;
433 
434         adapter->ioport = MEM_PORT;
435 
436         /* enable sdio new mode */
437         if (mwifiex_read_reg(adapter, CARD_CONFIG_2_1_REG, &reg))
438                 return -1;
439         if (mwifiex_write_reg(adapter, CARD_CONFIG_2_1_REG,
440                               reg | CMD53_NEW_MODE))
441                 return -1;
442 
443         /* Configure cmd port and enable reading rx length from the register */
444         if (mwifiex_read_reg(adapter, CMD_CONFIG_0, &reg))
445                 return -1;
446         if (mwifiex_write_reg(adapter, CMD_CONFIG_0, reg | CMD_PORT_RD_LEN_EN))
447                 return -1;
448 
449         /* Enable Dnld/Upld ready auto reset for cmd port after cmd53 is
450          * completed
451          */
452         if (mwifiex_read_reg(adapter, CMD_CONFIG_1, &reg))
453                 return -1;
454         if (mwifiex_write_reg(adapter, CMD_CONFIG_1, reg | CMD_PORT_AUTO_EN))
455                 return -1;
456 
457         return 0;
458 }
459 
460 /* This function initializes the IO ports.
461  *
462  * The following operations are performed -
463  *      - Read the IO ports (0, 1 and 2)
464  *      - Set host interrupt Reset-To-Read to clear
465  *      - Set auto re-enable interrupt
466  */
467 static int mwifiex_init_sdio_ioport(struct mwifiex_adapter *adapter)
468 {
469         u8 reg;
470         struct sdio_mmc_card *card = adapter->card;
471 
472         adapter->ioport = 0;
473 
474         if (card->supports_sdio_new_mode) {
475                 if (mwifiex_init_sdio_new_mode(adapter))
476                         return -1;
477                 goto cont;
478         }
479 
480         /* Read the IO port */
481         if (!mwifiex_read_reg(adapter, IO_PORT_0_REG, &reg))
482                 adapter->ioport |= (reg & 0xff);
483         else
484                 return -1;
485 
486         if (!mwifiex_read_reg(adapter, IO_PORT_1_REG, &reg))
487                 adapter->ioport |= ((reg & 0xff) << 8);
488         else
489                 return -1;
490 
491         if (!mwifiex_read_reg(adapter, IO_PORT_2_REG, &reg))
492                 adapter->ioport |= ((reg & 0xff) << 16);
493         else
494                 return -1;
495 cont:
496         pr_debug("info: SDIO FUNC1 IO port: %#x\n", adapter->ioport);
497 
498         /* Set Host interrupt reset to read to clear */
499         if (!mwifiex_read_reg(adapter, HOST_INT_RSR_REG, &reg))
500                 mwifiex_write_reg(adapter, HOST_INT_RSR_REG,
501                                   reg | card->reg->sdio_int_mask);
502         else
503                 return -1;
504 
505         /* Dnld/Upld ready set to auto reset */
506         if (!mwifiex_read_reg(adapter, card->reg->card_misc_cfg_reg, &reg))
507                 mwifiex_write_reg(adapter, card->reg->card_misc_cfg_reg,
508                                   reg | AUTO_RE_ENABLE_INT);
509         else
510                 return -1;
511 
512         return 0;
513 }
514 
515 /*
516  * This function sends data to the card.
517  */
518 static int mwifiex_write_data_to_card(struct mwifiex_adapter *adapter,
519                                       u8 *payload, u32 pkt_len, u32 port)
520 {
521         u32 i = 0;
522         int ret;
523 
524         do {
525                 ret = mwifiex_write_data_sync(adapter, payload, pkt_len, port);
526                 if (ret) {
527                         i++;
528                         dev_err(adapter->dev, "host_to_card, write iomem"
529                                         " (%d) failed: %d\n", i, ret);
530                         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
531                                 dev_err(adapter->dev, "write CFG reg failed\n");
532 
533                         ret = -1;
534                         if (i > MAX_WRITE_IOMEM_RETRY)
535                                 return ret;
536                 }
537         } while (ret == -1);
538 
539         return ret;
540 }
541 
542 /*
543  * This function gets the read port.
544  *
545  * If control port bit is set in MP read bitmap, the control port
546  * is returned, otherwise the current read port is returned and
547  * the value is increased (provided it does not reach the maximum
548  * limit, in which case it is reset to 1)
549  */
550 static int mwifiex_get_rd_port(struct mwifiex_adapter *adapter, u8 *port)
551 {
552         struct sdio_mmc_card *card = adapter->card;
553         const struct mwifiex_sdio_card_reg *reg = card->reg;
554         u32 rd_bitmap = card->mp_rd_bitmap;
555 
556         dev_dbg(adapter->dev, "data: mp_rd_bitmap=0x%08x\n", rd_bitmap);
557 
558         if (card->supports_sdio_new_mode) {
559                 if (!(rd_bitmap & reg->data_port_mask))
560                         return -1;
561         } else {
562                 if (!(rd_bitmap & (CTRL_PORT_MASK | reg->data_port_mask)))
563                         return -1;
564         }
565 
566         if ((card->has_control_mask) &&
567             (card->mp_rd_bitmap & CTRL_PORT_MASK)) {
568                 card->mp_rd_bitmap &= (u32) (~CTRL_PORT_MASK);
569                 *port = CTRL_PORT;
570                 dev_dbg(adapter->dev, "data: port=%d mp_rd_bitmap=0x%08x\n",
571                         *port, card->mp_rd_bitmap);
572                 return 0;
573         }
574 
575         if (!(card->mp_rd_bitmap & (1 << card->curr_rd_port)))
576                 return -1;
577 
578         /* We are now handling the SDIO data ports */
579         card->mp_rd_bitmap &= (u32)(~(1 << card->curr_rd_port));
580         *port = card->curr_rd_port;
581 
582         if (++card->curr_rd_port == card->max_ports)
583                 card->curr_rd_port = reg->start_rd_port;
584 
585         dev_dbg(adapter->dev,
586                 "data: port=%d mp_rd_bitmap=0x%08x -> 0x%08x\n",
587                 *port, rd_bitmap, card->mp_rd_bitmap);
588 
589         return 0;
590 }
591 
592 /*
593  * This function gets the write port for data.
594  *
595  * The current write port is returned if available and the value is
596  * increased (provided it does not reach the maximum limit, in which
597  * case it is reset to 1)
598  */
599 static int mwifiex_get_wr_port_data(struct mwifiex_adapter *adapter, u32 *port)
600 {
601         struct sdio_mmc_card *card = adapter->card;
602         const struct mwifiex_sdio_card_reg *reg = card->reg;
603         u32 wr_bitmap = card->mp_wr_bitmap;
604 
605         dev_dbg(adapter->dev, "data: mp_wr_bitmap=0x%08x\n", wr_bitmap);
606 
607         if (card->supports_sdio_new_mode &&
608             !(wr_bitmap & reg->data_port_mask)) {
609                 adapter->data_sent = true;
610                 return -EBUSY;
611         } else if (!card->supports_sdio_new_mode &&
612                    !(wr_bitmap & card->mp_data_port_mask)) {
613                 return -1;
614         }
615 
616         if (card->mp_wr_bitmap & (1 << card->curr_wr_port)) {
617                 card->mp_wr_bitmap &= (u32) (~(1 << card->curr_wr_port));
618                 *port = card->curr_wr_port;
619                 if (((card->supports_sdio_new_mode) &&
620                      (++card->curr_wr_port == card->max_ports)) ||
621                     ((!card->supports_sdio_new_mode) &&
622                      (++card->curr_wr_port == card->mp_end_port)))
623                         card->curr_wr_port = reg->start_wr_port;
624         } else {
625                 adapter->data_sent = true;
626                 return -EBUSY;
627         }
628 
629         if ((card->has_control_mask) && (*port == CTRL_PORT)) {
630                 dev_err(adapter->dev,
631                         "invalid data port=%d cur port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
632                         *port, card->curr_wr_port, wr_bitmap,
633                         card->mp_wr_bitmap);
634                 return -1;
635         }
636 
637         dev_dbg(adapter->dev, "data: port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
638                 *port, wr_bitmap, card->mp_wr_bitmap);
639 
640         return 0;
641 }
642 
643 /*
644  * This function polls the card status.
645  */
646 static int
647 mwifiex_sdio_poll_card_status(struct mwifiex_adapter *adapter, u8 bits)
648 {
649         struct sdio_mmc_card *card = adapter->card;
650         u32 tries;
651         u8 cs;
652 
653         for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
654                 if (mwifiex_read_reg(adapter, card->reg->poll_reg, &cs))
655                         break;
656                 else if ((cs & bits) == bits)
657                         return 0;
658 
659                 usleep_range(10, 20);
660         }
661 
662         dev_err(adapter->dev, "poll card status failed, tries = %d\n", tries);
663 
664         return -1;
665 }
666 
667 /*
668  * This function reads the firmware status.
669  */
670 static int
671 mwifiex_sdio_read_fw_status(struct mwifiex_adapter *adapter, u16 *dat)
672 {
673         struct sdio_mmc_card *card = adapter->card;
674         const struct mwifiex_sdio_card_reg *reg = card->reg;
675         u8 fws0, fws1;
676 
677         if (mwifiex_read_reg(adapter, reg->status_reg_0, &fws0))
678                 return -1;
679 
680         if (mwifiex_read_reg(adapter, reg->status_reg_1, &fws1))
681                 return -1;
682 
683         *dat = (u16) ((fws1 << 8) | fws0);
684 
685         return 0;
686 }
687 
688 /*
689  * This function disables the host interrupt.
690  *
691  * The host interrupt mask is read, the disable bit is reset and
692  * written back to the card host interrupt mask register.
693  */
694 static void mwifiex_sdio_disable_host_int(struct mwifiex_adapter *adapter)
695 {
696         struct sdio_mmc_card *card = adapter->card;
697         struct sdio_func *func = card->func;
698 
699         sdio_claim_host(func);
700         mwifiex_write_reg_locked(func, HOST_INT_MASK_REG, 0);
701         sdio_release_irq(func);
702         sdio_release_host(func);
703 }
704 
705 /*
706  * This function reads the interrupt status from card.
707  */
708 static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter)
709 {
710         struct sdio_mmc_card *card = adapter->card;
711         u8 sdio_ireg;
712         unsigned long flags;
713 
714         if (mwifiex_read_data_sync(adapter, card->mp_regs,
715                                    card->reg->max_mp_regs,
716                                    REG_PORT | MWIFIEX_SDIO_BYTE_MODE_MASK, 0)) {
717                 dev_err(adapter->dev, "read mp_regs failed\n");
718                 return;
719         }
720 
721         sdio_ireg = card->mp_regs[HOST_INTSTATUS_REG];
722         if (sdio_ireg) {
723                 /*
724                  * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
725                  * For SDIO new mode CMD port interrupts
726                  *      DN_LD_CMD_PORT_HOST_INT_STATUS and/or
727                  *      UP_LD_CMD_PORT_HOST_INT_STATUS
728                  * Clear the interrupt status register
729                  */
730                 dev_dbg(adapter->dev, "int: sdio_ireg = %#x\n", sdio_ireg);
731                 spin_lock_irqsave(&adapter->int_lock, flags);
732                 adapter->int_status |= sdio_ireg;
733                 spin_unlock_irqrestore(&adapter->int_lock, flags);
734         }
735 }
736 
737 /*
738  * SDIO interrupt handler.
739  *
740  * This function reads the interrupt status from firmware and handles
741  * the interrupt in current thread (ksdioirqd) right away.
742  */
743 static void
744 mwifiex_sdio_interrupt(struct sdio_func *func)
745 {
746         struct mwifiex_adapter *adapter;
747         struct sdio_mmc_card *card;
748 
749         card = sdio_get_drvdata(func);
750         if (!card || !card->adapter) {
751                 pr_debug("int: func=%p card=%p adapter=%p\n",
752                          func, card, card ? card->adapter : NULL);
753                 return;
754         }
755         adapter = card->adapter;
756 
757         if (!adapter->pps_uapsd_mode && adapter->ps_state == PS_STATE_SLEEP)
758                 adapter->ps_state = PS_STATE_AWAKE;
759 
760         mwifiex_interrupt_status(adapter);
761         mwifiex_main_process(adapter);
762 }
763 
764 /*
765  * This function enables the host interrupt.
766  *
767  * The host interrupt enable mask is written to the card
768  * host interrupt mask register.
769  */
770 static int mwifiex_sdio_enable_host_int(struct mwifiex_adapter *adapter)
771 {
772         struct sdio_mmc_card *card = adapter->card;
773         struct sdio_func *func = card->func;
774         int ret;
775 
776         sdio_claim_host(func);
777 
778         /* Request the SDIO IRQ */
779         ret = sdio_claim_irq(func, mwifiex_sdio_interrupt);
780         if (ret) {
781                 dev_err(adapter->dev, "claim irq failed: ret=%d\n", ret);
782                 goto out;
783         }
784 
785         /* Simply write the mask to the register */
786         ret = mwifiex_write_reg_locked(func, HOST_INT_MASK_REG,
787                                        card->reg->host_int_enable);
788         if (ret) {
789                 dev_err(adapter->dev, "enable host interrupt failed\n");
790                 sdio_release_irq(func);
791         }
792 
793 out:
794         sdio_release_host(func);
795         return ret;
796 }
797 
798 /*
799  * This function sends a data buffer to the card.
800  */
801 static int mwifiex_sdio_card_to_host(struct mwifiex_adapter *adapter,
802                                      u32 *type, u8 *buffer,
803                                      u32 npayload, u32 ioport)
804 {
805         int ret;
806         u32 nb;
807 
808         if (!buffer) {
809                 dev_err(adapter->dev, "%s: buffer is NULL\n", __func__);
810                 return -1;
811         }
812 
813         ret = mwifiex_read_data_sync(adapter, buffer, npayload, ioport, 1);
814 
815         if (ret) {
816                 dev_err(adapter->dev, "%s: read iomem failed: %d\n", __func__,
817                         ret);
818                 return -1;
819         }
820 
821         nb = le16_to_cpu(*(__le16 *) (buffer));
822         if (nb > npayload) {
823                 dev_err(adapter->dev, "%s: invalid packet, nb=%d npayload=%d\n",
824                         __func__, nb, npayload);
825                 return -1;
826         }
827 
828         *type = le16_to_cpu(*(__le16 *) (buffer + 2));
829 
830         return ret;
831 }
832 
833 /*
834  * This function downloads the firmware to the card.
835  *
836  * Firmware is downloaded to the card in blocks. Every block download
837  * is tested for CRC errors, and retried a number of times before
838  * returning failure.
839  */
840 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
841                                     struct mwifiex_fw_image *fw)
842 {
843         struct sdio_mmc_card *card = adapter->card;
844         const struct mwifiex_sdio_card_reg *reg = card->reg;
845         int ret;
846         u8 *firmware = fw->fw_buf;
847         u32 firmware_len = fw->fw_len;
848         u32 offset = 0;
849         u8 base0, base1;
850         u8 *fwbuf;
851         u16 len = 0;
852         u32 txlen, tx_blocks = 0, tries;
853         u32 i = 0;
854 
855         if (!firmware_len) {
856                 dev_err(adapter->dev,
857                         "firmware image not found! Terminating download\n");
858                 return -1;
859         }
860 
861         dev_dbg(adapter->dev, "info: downloading FW image (%d bytes)\n",
862                 firmware_len);
863 
864         /* Assume that the allocated buffer is 8-byte aligned */
865         fwbuf = kzalloc(MWIFIEX_UPLD_SIZE, GFP_KERNEL);
866         if (!fwbuf)
867                 return -ENOMEM;
868 
869         /* Perform firmware data transfer */
870         do {
871                 /* The host polls for the DN_LD_CARD_RDY and CARD_IO_READY
872                    bits */
873                 ret = mwifiex_sdio_poll_card_status(adapter, CARD_IO_READY |
874                                                     DN_LD_CARD_RDY);
875                 if (ret) {
876                         dev_err(adapter->dev, "FW download with helper:"
877                                 " poll status timeout @ %d\n", offset);
878                         goto done;
879                 }
880 
881                 /* More data? */
882                 if (offset >= firmware_len)
883                         break;
884 
885                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
886                         ret = mwifiex_read_reg(adapter, reg->base_0_reg,
887                                                &base0);
888                         if (ret) {
889                                 dev_err(adapter->dev,
890                                         "dev BASE0 register read failed: "
891                                         "base0=%#04X(%d). Terminating dnld\n",
892                                         base0, base0);
893                                 goto done;
894                         }
895                         ret = mwifiex_read_reg(adapter, reg->base_1_reg,
896                                                &base1);
897                         if (ret) {
898                                 dev_err(adapter->dev,
899                                         "dev BASE1 register read failed: "
900                                         "base1=%#04X(%d). Terminating dnld\n",
901                                         base1, base1);
902                                 goto done;
903                         }
904                         len = (u16) (((base1 & 0xff) << 8) | (base0 & 0xff));
905 
906                         if (len)
907                                 break;
908 
909                         usleep_range(10, 20);
910                 }
911 
912                 if (!len) {
913                         break;
914                 } else if (len > MWIFIEX_UPLD_SIZE) {
915                         dev_err(adapter->dev,
916                                 "FW dnld failed @ %d, invalid length %d\n",
917                                 offset, len);
918                         ret = -1;
919                         goto done;
920                 }
921 
922                 txlen = len;
923 
924                 if (len & BIT(0)) {
925                         i++;
926                         if (i > MAX_WRITE_IOMEM_RETRY) {
927                                 dev_err(adapter->dev,
928                                         "FW dnld failed @ %d, over max retry\n",
929                                         offset);
930                                 ret = -1;
931                                 goto done;
932                         }
933                         dev_err(adapter->dev, "CRC indicated by the helper:"
934                                 " len = 0x%04X, txlen = %d\n", len, txlen);
935                         len &= ~BIT(0);
936                         /* Setting this to 0 to resend from same offset */
937                         txlen = 0;
938                 } else {
939                         i = 0;
940 
941                         /* Set blocksize to transfer - checking for last
942                            block */
943                         if (firmware_len - offset < txlen)
944                                 txlen = firmware_len - offset;
945 
946                         tx_blocks = (txlen + MWIFIEX_SDIO_BLOCK_SIZE - 1)
947                                     / MWIFIEX_SDIO_BLOCK_SIZE;
948 
949                         /* Copy payload to buffer */
950                         memmove(fwbuf, &firmware[offset], txlen);
951                 }
952 
953                 ret = mwifiex_write_data_sync(adapter, fwbuf, tx_blocks *
954                                               MWIFIEX_SDIO_BLOCK_SIZE,
955                                               adapter->ioport);
956                 if (ret) {
957                         dev_err(adapter->dev,
958                                 "FW download, write iomem (%d) failed @ %d\n",
959                                 i, offset);
960                         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
961                                 dev_err(adapter->dev, "write CFG reg failed\n");
962 
963                         ret = -1;
964                         goto done;
965                 }
966 
967                 offset += txlen;
968         } while (true);
969 
970         dev_dbg(adapter->dev, "info: FW download over, size %d bytes\n",
971                 offset);
972 
973         ret = 0;
974 done:
975         kfree(fwbuf);
976         return ret;
977 }
978 
979 /*
980  * This function checks the firmware status in card.
981  *
982  * The winner interface is also determined by this function.
983  */
984 static int mwifiex_check_fw_status(struct mwifiex_adapter *adapter,
985                                    u32 poll_num)
986 {
987         struct sdio_mmc_card *card = adapter->card;
988         int ret = 0;
989         u16 firmware_stat;
990         u32 tries;
991         u8 winner_status;
992 
993         /* Wait for firmware initialization event */
994         for (tries = 0; tries < poll_num; tries++) {
995                 ret = mwifiex_sdio_read_fw_status(adapter, &firmware_stat);
996                 if (ret)
997                         continue;
998                 if (firmware_stat == FIRMWARE_READY_SDIO) {
999                         ret = 0;
1000                         break;
1001                 } else {
1002                         msleep(100);
1003                         ret = -1;
1004                 }
1005         }
1006 
1007         if (ret) {
1008                 if (mwifiex_read_reg
1009                     (adapter, card->reg->status_reg_0, &winner_status))
1010                         winner_status = 0;
1011 
1012                 if (winner_status)
1013                         adapter->winner = 0;
1014                 else
1015                         adapter->winner = 1;
1016         }
1017         return ret;
1018 }
1019 
1020 /*
1021  * This function decodes a received packet.
1022  *
1023  * Based on the type, the packet is treated as either a data, or
1024  * a command response, or an event, and the correct handler
1025  * function is invoked.
1026  */
1027 static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter,
1028                                     struct sk_buff *skb, u32 upld_typ)
1029 {
1030         u8 *cmd_buf;
1031         __le16 *curr_ptr = (__le16 *)skb->data;
1032         u16 pkt_len = le16_to_cpu(*curr_ptr);
1033 
1034         skb_trim(skb, pkt_len);
1035         skb_pull(skb, INTF_HEADER_LEN);
1036 
1037         switch (upld_typ) {
1038         case MWIFIEX_TYPE_DATA:
1039                 dev_dbg(adapter->dev, "info: --- Rx: Data packet ---\n");
1040                 mwifiex_handle_rx_packet(adapter, skb);
1041                 break;
1042 
1043         case MWIFIEX_TYPE_CMD:
1044                 dev_dbg(adapter->dev, "info: --- Rx: Cmd Response ---\n");
1045                 /* take care of curr_cmd = NULL case */
1046                 if (!adapter->curr_cmd) {
1047                         cmd_buf = adapter->upld_buf;
1048 
1049                         if (adapter->ps_state == PS_STATE_SLEEP_CFM)
1050                                 mwifiex_process_sleep_confirm_resp(adapter,
1051                                                                    skb->data,
1052                                                                    skb->len);
1053 
1054                         memcpy(cmd_buf, skb->data,
1055                                min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER,
1056                                      skb->len));
1057 
1058                         dev_kfree_skb_any(skb);
1059                 } else {
1060                         adapter->cmd_resp_received = true;
1061                         adapter->curr_cmd->resp_skb = skb;
1062                 }
1063                 break;
1064 
1065         case MWIFIEX_TYPE_EVENT:
1066                 dev_dbg(adapter->dev, "info: --- Rx: Event ---\n");
1067                 adapter->event_cause = le32_to_cpu(*(__le32 *) skb->data);
1068 
1069                 if ((skb->len > 0) && (skb->len  < MAX_EVENT_SIZE))
1070                         memcpy(adapter->event_body,
1071                                skb->data + MWIFIEX_EVENT_HEADER_LEN,
1072                                skb->len);
1073 
1074                 /* event cause has been saved to adapter->event_cause */
1075                 adapter->event_received = true;
1076                 adapter->event_skb = skb;
1077 
1078                 break;
1079 
1080         default:
1081                 dev_err(adapter->dev, "unknown upload type %#x\n", upld_typ);
1082                 dev_kfree_skb_any(skb);
1083                 break;
1084         }
1085 
1086         return 0;
1087 }
1088 
1089 /*
1090  * This function transfers received packets from card to driver, performing
1091  * aggregation if required.
1092  *
1093  * For data received on control port, or if aggregation is disabled, the
1094  * received buffers are uploaded as separate packets. However, if aggregation
1095  * is enabled and required, the buffers are copied onto an aggregation buffer,
1096  * provided there is space left, processed and finally uploaded.
1097  */
1098 static int mwifiex_sdio_card_to_host_mp_aggr(struct mwifiex_adapter *adapter,
1099                                              struct sk_buff *skb, u8 port)
1100 {
1101         struct sdio_mmc_card *card = adapter->card;
1102         s32 f_do_rx_aggr = 0;
1103         s32 f_do_rx_cur = 0;
1104         s32 f_aggr_cur = 0;
1105         struct sk_buff *skb_deaggr;
1106         u32 pind;
1107         u32 pkt_len, pkt_type, mport;
1108         u8 *curr_ptr;
1109         u32 rx_len = skb->len;
1110 
1111         if ((card->has_control_mask) && (port == CTRL_PORT)) {
1112                 /* Read the command Resp without aggr */
1113                 dev_dbg(adapter->dev, "info: %s: no aggregation for cmd "
1114                         "response\n", __func__);
1115 
1116                 f_do_rx_cur = 1;
1117                 goto rx_curr_single;
1118         }
1119 
1120         if (!card->mpa_rx.enabled) {
1121                 dev_dbg(adapter->dev, "info: %s: rx aggregation disabled\n",
1122                         __func__);
1123 
1124                 f_do_rx_cur = 1;
1125                 goto rx_curr_single;
1126         }
1127 
1128         if ((!card->has_control_mask && (card->mp_rd_bitmap &
1129                                          card->reg->data_port_mask)) ||
1130             (card->has_control_mask && (card->mp_rd_bitmap &
1131                                         (~((u32) CTRL_PORT_MASK))))) {
1132                 /* Some more data RX pending */
1133                 dev_dbg(adapter->dev, "info: %s: not last packet\n", __func__);
1134 
1135                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1136                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len)) {
1137                                 f_aggr_cur = 1;
1138                         } else {
1139                                 /* No room in Aggr buf, do rx aggr now */
1140                                 f_do_rx_aggr = 1;
1141                                 f_do_rx_cur = 1;
1142                         }
1143                 } else {
1144                         /* Rx aggr not in progress */
1145                         f_aggr_cur = 1;
1146                 }
1147 
1148         } else {
1149                 /* No more data RX pending */
1150                 dev_dbg(adapter->dev, "info: %s: last packet\n", __func__);
1151 
1152                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1153                         f_do_rx_aggr = 1;
1154                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len))
1155                                 f_aggr_cur = 1;
1156                         else
1157                                 /* No room in Aggr buf, do rx aggr now */
1158                                 f_do_rx_cur = 1;
1159                 } else {
1160                         f_do_rx_cur = 1;
1161                 }
1162         }
1163 
1164         if (f_aggr_cur) {
1165                 dev_dbg(adapter->dev, "info: current packet aggregation\n");
1166                 /* Curr pkt can be aggregated */
1167                 mp_rx_aggr_setup(card, skb, port);
1168 
1169                 if (MP_RX_AGGR_PKT_LIMIT_REACHED(card) ||
1170                     mp_rx_aggr_port_limit_reached(card)) {
1171                         dev_dbg(adapter->dev, "info: %s: aggregated packet "
1172                                 "limit reached\n", __func__);
1173                         /* No more pkts allowed in Aggr buf, rx it */
1174                         f_do_rx_aggr = 1;
1175                 }
1176         }
1177 
1178         if (f_do_rx_aggr) {
1179                 /* do aggr RX now */
1180                 dev_dbg(adapter->dev, "info: do_rx_aggr: num of packets: %d\n",
1181                         card->mpa_rx.pkt_cnt);
1182 
1183                 if (card->supports_sdio_new_mode) {
1184                         int i;
1185                         u32 port_count;
1186 
1187                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1188                                 if (card->mpa_rx.ports & BIT(i))
1189                                         port_count++;
1190 
1191                         /* Reading data from "start_port + 0" to "start_port +
1192                          * port_count -1", so decrease the count by 1
1193                          */
1194                         port_count--;
1195                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1196                                  (port_count << 8)) + card->mpa_rx.start_port;
1197                 } else {
1198                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1199                                  (card->mpa_rx.ports << 4)) +
1200                                  card->mpa_rx.start_port;
1201                 }
1202 
1203                 if (mwifiex_read_data_sync(adapter, card->mpa_rx.buf,
1204                                            card->mpa_rx.buf_len, mport, 1))
1205                         goto error;
1206 
1207                 curr_ptr = card->mpa_rx.buf;
1208 
1209                 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1210 
1211                         /* get curr PKT len & type */
1212                         pkt_len = le16_to_cpu(*(__le16 *) &curr_ptr[0]);
1213                         pkt_type = le16_to_cpu(*(__le16 *) &curr_ptr[2]);
1214 
1215                         /* copy pkt to deaggr buf */
1216                         skb_deaggr = card->mpa_rx.skb_arr[pind];
1217 
1218                         if ((pkt_type == MWIFIEX_TYPE_DATA) && (pkt_len <=
1219                                          card->mpa_rx.len_arr[pind])) {
1220 
1221                                 memcpy(skb_deaggr->data, curr_ptr, pkt_len);
1222 
1223                                 skb_trim(skb_deaggr, pkt_len);
1224 
1225                                 /* Process de-aggr packet */
1226                                 mwifiex_decode_rx_packet(adapter, skb_deaggr,
1227                                                          pkt_type);
1228                         } else {
1229                                 dev_err(adapter->dev, "wrong aggr pkt:"
1230                                         " type=%d len=%d max_len=%d\n",
1231                                         pkt_type, pkt_len,
1232                                         card->mpa_rx.len_arr[pind]);
1233                                 dev_kfree_skb_any(skb_deaggr);
1234                         }
1235                         curr_ptr += card->mpa_rx.len_arr[pind];
1236                 }
1237                 MP_RX_AGGR_BUF_RESET(card);
1238         }
1239 
1240 rx_curr_single:
1241         if (f_do_rx_cur) {
1242                 dev_dbg(adapter->dev, "info: RX: port: %d, rx_len: %d\n",
1243                         port, rx_len);
1244 
1245                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
1246                                               skb->data, skb->len,
1247                                               adapter->ioport + port))
1248                         goto error;
1249 
1250                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1251         }
1252 
1253         return 0;
1254 
1255 error:
1256         if (MP_RX_AGGR_IN_PROGRESS(card)) {
1257                 /* Multiport-aggregation transfer failed - cleanup */
1258                 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1259                         /* copy pkt to deaggr buf */
1260                         skb_deaggr = card->mpa_rx.skb_arr[pind];
1261                         dev_kfree_skb_any(skb_deaggr);
1262                 }
1263                 MP_RX_AGGR_BUF_RESET(card);
1264         }
1265 
1266         if (f_do_rx_cur)
1267                 /* Single transfer pending. Free curr buff also */
1268                 dev_kfree_skb_any(skb);
1269 
1270         return -1;
1271 }
1272 
1273 /*
1274  * This function checks the current interrupt status.
1275  *
1276  * The following interrupts are checked and handled by this function -
1277  *      - Data sent
1278  *      - Command sent
1279  *      - Packets received
1280  *
1281  * Since the firmware does not generate download ready interrupt if the
1282  * port updated is command port only, command sent interrupt checking
1283  * should be done manually, and for every SDIO interrupt.
1284  *
1285  * In case of Rx packets received, the packets are uploaded from card to
1286  * host and processed accordingly.
1287  */
1288 static int mwifiex_process_int_status(struct mwifiex_adapter *adapter)
1289 {
1290         struct sdio_mmc_card *card = adapter->card;
1291         const struct mwifiex_sdio_card_reg *reg = card->reg;
1292         int ret = 0;
1293         u8 sdio_ireg;
1294         struct sk_buff *skb;
1295         u8 port = CTRL_PORT;
1296         u32 len_reg_l, len_reg_u;
1297         u32 rx_blocks;
1298         u16 rx_len;
1299         unsigned long flags;
1300         u32 bitmap;
1301         u8 cr;
1302 
1303         spin_lock_irqsave(&adapter->int_lock, flags);
1304         sdio_ireg = adapter->int_status;
1305         adapter->int_status = 0;
1306         spin_unlock_irqrestore(&adapter->int_lock, flags);
1307 
1308         if (!sdio_ireg)
1309                 return ret;
1310 
1311         /* Following interrupt is only for SDIO new mode */
1312         if (sdio_ireg & DN_LD_CMD_PORT_HOST_INT_STATUS && adapter->cmd_sent)
1313                 adapter->cmd_sent = false;
1314 
1315         /* Following interrupt is only for SDIO new mode */
1316         if (sdio_ireg & UP_LD_CMD_PORT_HOST_INT_STATUS) {
1317                 u32 pkt_type;
1318 
1319                 /* read the len of control packet */
1320                 rx_len = card->mp_regs[CMD_RD_LEN_1] << 8;
1321                 rx_len |= (u16) card->mp_regs[CMD_RD_LEN_0];
1322                 rx_blocks = DIV_ROUND_UP(rx_len, MWIFIEX_SDIO_BLOCK_SIZE);
1323                 if (rx_len <= INTF_HEADER_LEN ||
1324                     (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1325                      MWIFIEX_RX_DATA_BUF_SIZE)
1326                         return -1;
1327                 rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1328 
1329                 skb = dev_alloc_skb(rx_len);
1330                 if (!skb)
1331                         return -1;
1332 
1333                 skb_put(skb, rx_len);
1334 
1335                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type, skb->data,
1336                                               skb->len, adapter->ioport |
1337                                                         CMD_PORT_SLCT)) {
1338                         dev_err(adapter->dev,
1339                                 "%s: failed to card_to_host", __func__);
1340                         dev_kfree_skb_any(skb);
1341                         goto term_cmd;
1342                 }
1343 
1344                 if ((pkt_type != MWIFIEX_TYPE_CMD) &&
1345                     (pkt_type != MWIFIEX_TYPE_EVENT))
1346                         dev_err(adapter->dev,
1347                                 "%s:Received wrong packet on cmd port",
1348                                 __func__);
1349 
1350                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1351         }
1352 
1353         if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
1354                 bitmap = (u32) card->mp_regs[reg->wr_bitmap_l];
1355                 bitmap |= ((u32) card->mp_regs[reg->wr_bitmap_u]) << 8;
1356                 if (card->supports_sdio_new_mode) {
1357                         bitmap |=
1358                                 ((u32) card->mp_regs[reg->wr_bitmap_1l]) << 16;
1359                         bitmap |=
1360                                 ((u32) card->mp_regs[reg->wr_bitmap_1u]) << 24;
1361                 }
1362                 card->mp_wr_bitmap = bitmap;
1363 
1364                 dev_dbg(adapter->dev, "int: DNLD: wr_bitmap=0x%x\n",
1365                         card->mp_wr_bitmap);
1366                 if (adapter->data_sent &&
1367                     (card->mp_wr_bitmap & card->mp_data_port_mask)) {
1368                         dev_dbg(adapter->dev,
1369                                 "info:  <--- Tx DONE Interrupt --->\n");
1370                         adapter->data_sent = false;
1371                 }
1372         }
1373 
1374         /* As firmware will not generate download ready interrupt if the port
1375            updated is command port only, cmd_sent should be done for any SDIO
1376            interrupt. */
1377         if (card->has_control_mask && adapter->cmd_sent) {
1378                 /* Check if firmware has attach buffer at command port and
1379                    update just that in wr_bit_map. */
1380                 card->mp_wr_bitmap |=
1381                         (u32) card->mp_regs[reg->wr_bitmap_l] & CTRL_PORT_MASK;
1382                 if (card->mp_wr_bitmap & CTRL_PORT_MASK)
1383                         adapter->cmd_sent = false;
1384         }
1385 
1386         dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n",
1387                 adapter->cmd_sent, adapter->data_sent);
1388         if (sdio_ireg & UP_LD_HOST_INT_STATUS) {
1389                 bitmap = (u32) card->mp_regs[reg->rd_bitmap_l];
1390                 bitmap |= ((u32) card->mp_regs[reg->rd_bitmap_u]) << 8;
1391                 if (card->supports_sdio_new_mode) {
1392                         bitmap |=
1393                                 ((u32) card->mp_regs[reg->rd_bitmap_1l]) << 16;
1394                         bitmap |=
1395                                 ((u32) card->mp_regs[reg->rd_bitmap_1u]) << 24;
1396                 }
1397                 card->mp_rd_bitmap = bitmap;
1398                 dev_dbg(adapter->dev, "int: UPLD: rd_bitmap=0x%x\n",
1399                         card->mp_rd_bitmap);
1400 
1401                 while (true) {
1402                         ret = mwifiex_get_rd_port(adapter, &port);
1403                         if (ret) {
1404                                 dev_dbg(adapter->dev,
1405                                         "info: no more rd_port available\n");
1406                                 break;
1407                         }
1408                         len_reg_l = reg->rd_len_p0_l + (port << 1);
1409                         len_reg_u = reg->rd_len_p0_u + (port << 1);
1410                         rx_len = ((u16) card->mp_regs[len_reg_u]) << 8;
1411                         rx_len |= (u16) card->mp_regs[len_reg_l];
1412                         dev_dbg(adapter->dev, "info: RX: port=%d rx_len=%u\n",
1413                                 port, rx_len);
1414                         rx_blocks =
1415                                 (rx_len + MWIFIEX_SDIO_BLOCK_SIZE -
1416                                  1) / MWIFIEX_SDIO_BLOCK_SIZE;
1417                         if (rx_len <= INTF_HEADER_LEN ||
1418                             (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1419                              MWIFIEX_RX_DATA_BUF_SIZE) {
1420                                 dev_err(adapter->dev, "invalid rx_len=%d\n",
1421                                         rx_len);
1422                                 return -1;
1423                         }
1424                         rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1425 
1426                         skb = dev_alloc_skb(rx_len);
1427 
1428                         if (!skb) {
1429                                 dev_err(adapter->dev, "%s: failed to alloc skb",
1430                                         __func__);
1431                                 return -1;
1432                         }
1433 
1434                         skb_put(skb, rx_len);
1435 
1436                         dev_dbg(adapter->dev, "info: rx_len = %d skb->len = %d\n",
1437                                 rx_len, skb->len);
1438 
1439                         if (mwifiex_sdio_card_to_host_mp_aggr(adapter, skb,
1440                                                               port)) {
1441                                 dev_err(adapter->dev, "card_to_host_mpa failed:"
1442                                         " int status=%#x\n", sdio_ireg);
1443                                 goto term_cmd;
1444                         }
1445                 }
1446         }
1447 
1448         return 0;
1449 
1450 term_cmd:
1451         /* terminate cmd */
1452         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1453                 dev_err(adapter->dev, "read CFG reg failed\n");
1454         else
1455                 dev_dbg(adapter->dev, "info: CFG reg val = %d\n", cr);
1456 
1457         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, (cr | 0x04)))
1458                 dev_err(adapter->dev, "write CFG reg failed\n");
1459         else
1460                 dev_dbg(adapter->dev, "info: write success\n");
1461 
1462         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1463                 dev_err(adapter->dev, "read CFG reg failed\n");
1464         else
1465                 dev_dbg(adapter->dev, "info: CFG reg val =%x\n", cr);
1466 
1467         return -1;
1468 }
1469 
1470 /*
1471  * This function aggregates transmission buffers in driver and downloads
1472  * the aggregated packet to card.
1473  *
1474  * The individual packets are aggregated by copying into an aggregation
1475  * buffer and then downloaded to the card. Previous unsent packets in the
1476  * aggregation buffer are pre-copied first before new packets are added.
1477  * Aggregation is done till there is space left in the aggregation buffer,
1478  * or till new packets are available.
1479  *
1480  * The function will only download the packet to the card when aggregation
1481  * stops, otherwise it will just aggregate the packet in aggregation buffer
1482  * and return.
1483  */
1484 static int mwifiex_host_to_card_mp_aggr(struct mwifiex_adapter *adapter,
1485                                         u8 *payload, u32 pkt_len, u32 port,
1486                                         u32 next_pkt_len)
1487 {
1488         struct sdio_mmc_card *card = adapter->card;
1489         int ret = 0;
1490         s32 f_send_aggr_buf = 0;
1491         s32 f_send_cur_buf = 0;
1492         s32 f_precopy_cur_buf = 0;
1493         s32 f_postcopy_cur_buf = 0;
1494         u32 mport;
1495 
1496         if (!card->mpa_tx.enabled ||
1497             (card->has_control_mask && (port == CTRL_PORT)) ||
1498             (card->supports_sdio_new_mode && (port == CMD_PORT_SLCT))) {
1499                 dev_dbg(adapter->dev, "info: %s: tx aggregation disabled\n",
1500                         __func__);
1501 
1502                 f_send_cur_buf = 1;
1503                 goto tx_curr_single;
1504         }
1505 
1506         if (next_pkt_len) {
1507                 /* More pkt in TX queue */
1508                 dev_dbg(adapter->dev, "info: %s: more packets in queue.\n",
1509                         __func__);
1510 
1511                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1512                         if (!mp_tx_aggr_port_limit_reached(card) &&
1513                             MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len)) {
1514                                 f_precopy_cur_buf = 1;
1515 
1516                                 if (!(card->mp_wr_bitmap &
1517                                       (1 << card->curr_wr_port)) ||
1518                                     !MP_TX_AGGR_BUF_HAS_ROOM(
1519                                             card, pkt_len + next_pkt_len))
1520                                         f_send_aggr_buf = 1;
1521                         } else {
1522                                 /* No room in Aggr buf, send it */
1523                                 f_send_aggr_buf = 1;
1524 
1525                                 if (mp_tx_aggr_port_limit_reached(card) ||
1526                                     !(card->mp_wr_bitmap &
1527                                       (1 << card->curr_wr_port)))
1528                                         f_send_cur_buf = 1;
1529                                 else
1530                                         f_postcopy_cur_buf = 1;
1531                         }
1532                 } else {
1533                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len) &&
1534                             (card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1535                                 f_precopy_cur_buf = 1;
1536                         else
1537                                 f_send_cur_buf = 1;
1538                 }
1539         } else {
1540                 /* Last pkt in TX queue */
1541                 dev_dbg(adapter->dev, "info: %s: Last packet in Tx Queue.\n",
1542                         __func__);
1543 
1544                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1545                         /* some packs in Aggr buf already */
1546                         f_send_aggr_buf = 1;
1547 
1548                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len))
1549                                 f_precopy_cur_buf = 1;
1550                         else
1551                                 /* No room in Aggr buf, send it */
1552                                 f_send_cur_buf = 1;
1553                 } else {
1554                         f_send_cur_buf = 1;
1555                 }
1556         }
1557 
1558         if (f_precopy_cur_buf) {
1559                 dev_dbg(adapter->dev, "data: %s: precopy current buffer\n",
1560                         __func__);
1561                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1562 
1563                 if (MP_TX_AGGR_PKT_LIMIT_REACHED(card) ||
1564                     mp_tx_aggr_port_limit_reached(card))
1565                         /* No more pkts allowed in Aggr buf, send it */
1566                         f_send_aggr_buf = 1;
1567         }
1568 
1569         if (f_send_aggr_buf) {
1570                 dev_dbg(adapter->dev, "data: %s: send aggr buffer: %d %d\n",
1571                         __func__,
1572                                 card->mpa_tx.start_port, card->mpa_tx.ports);
1573                 if (card->supports_sdio_new_mode) {
1574                         u32 port_count;
1575                         int i;
1576 
1577                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1578                                 if (card->mpa_tx.ports & BIT(i))
1579                                         port_count++;
1580 
1581                         /* Writing data from "start_port + 0" to "start_port +
1582                          * port_count -1", so decrease the count by 1
1583                          */
1584                         port_count--;
1585                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1586                                  (port_count << 8)) + card->mpa_tx.start_port;
1587                 } else {
1588                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1589                                  (card->mpa_tx.ports << 4)) +
1590                                  card->mpa_tx.start_port;
1591                 }
1592 
1593                 ret = mwifiex_write_data_to_card(adapter, card->mpa_tx.buf,
1594                                                  card->mpa_tx.buf_len, mport);
1595 
1596                 MP_TX_AGGR_BUF_RESET(card);
1597         }
1598 
1599 tx_curr_single:
1600         if (f_send_cur_buf) {
1601                 dev_dbg(adapter->dev, "data: %s: send current buffer %d\n",
1602                         __func__, port);
1603                 ret = mwifiex_write_data_to_card(adapter, payload, pkt_len,
1604                                                  adapter->ioport + port);
1605         }
1606 
1607         if (f_postcopy_cur_buf) {
1608                 dev_dbg(adapter->dev, "data: %s: postcopy current buffer\n",
1609                         __func__);
1610                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1611         }
1612 
1613         return ret;
1614 }
1615 
1616 /*
1617  * This function downloads data from driver to card.
1618  *
1619  * Both commands and data packets are transferred to the card by this
1620  * function.
1621  *
1622  * This function adds the SDIO specific header to the front of the buffer
1623  * before transferring. The header contains the length of the packet and
1624  * the type. The firmware handles the packets based upon this set type.
1625  */
1626 static int mwifiex_sdio_host_to_card(struct mwifiex_adapter *adapter,
1627                                      u8 type, struct sk_buff *skb,
1628                                      struct mwifiex_tx_param *tx_param)
1629 {
1630         struct sdio_mmc_card *card = adapter->card;
1631         int ret;
1632         u32 buf_block_len;
1633         u32 blk_size;
1634         u32 port = CTRL_PORT;
1635         u8 *payload = (u8 *)skb->data;
1636         u32 pkt_len = skb->len;
1637 
1638         /* Allocate buffer and copy payload */
1639         blk_size = MWIFIEX_SDIO_BLOCK_SIZE;
1640         buf_block_len = (pkt_len + blk_size - 1) / blk_size;
1641         *(__le16 *)&payload[0] = cpu_to_le16((u16)pkt_len);
1642         *(__le16 *)&payload[2] = cpu_to_le16(type);
1643 
1644         /*
1645          * This is SDIO specific header
1646          *  u16 length,
1647          *  u16 type (MWIFIEX_TYPE_DATA = 0, MWIFIEX_TYPE_CMD = 1,
1648          *  MWIFIEX_TYPE_EVENT = 3)
1649          */
1650         if (type == MWIFIEX_TYPE_DATA) {
1651                 ret = mwifiex_get_wr_port_data(adapter, &port);
1652                 if (ret) {
1653                         dev_err(adapter->dev, "%s: no wr_port available\n",
1654                                 __func__);
1655                         return ret;
1656                 }
1657         } else {
1658                 adapter->cmd_sent = true;
1659                 /* Type must be MWIFIEX_TYPE_CMD */
1660 
1661                 if (pkt_len <= INTF_HEADER_LEN ||
1662                     pkt_len > MWIFIEX_UPLD_SIZE)
1663                         dev_err(adapter->dev, "%s: payload=%p, nb=%d\n",
1664                                 __func__, payload, pkt_len);
1665 
1666                 if (card->supports_sdio_new_mode)
1667                         port = CMD_PORT_SLCT;
1668         }
1669 
1670         /* Transfer data to card */
1671         pkt_len = buf_block_len * blk_size;
1672 
1673         if (tx_param)
1674                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1675                                                    port, tx_param->next_pkt_len
1676                                                    );
1677         else
1678                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1679                                                    port, 0);
1680 
1681         if (ret) {
1682                 if (type == MWIFIEX_TYPE_CMD)
1683                         adapter->cmd_sent = false;
1684                 if (type == MWIFIEX_TYPE_DATA)
1685                         adapter->data_sent = false;
1686         } else {
1687                 if (type == MWIFIEX_TYPE_DATA) {
1688                         if (!(card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1689                                 adapter->data_sent = true;
1690                         else
1691                                 adapter->data_sent = false;
1692                 }
1693         }
1694 
1695         return ret;
1696 }
1697 
1698 /*
1699  * This function allocates the MPA Tx and Rx buffers.
1700  */
1701 static int mwifiex_alloc_sdio_mpa_buffers(struct mwifiex_adapter *adapter,
1702                                    u32 mpa_tx_buf_size, u32 mpa_rx_buf_size)
1703 {
1704         struct sdio_mmc_card *card = adapter->card;
1705         int ret = 0;
1706 
1707         card->mpa_tx.buf = kzalloc(mpa_tx_buf_size, GFP_KERNEL);
1708         if (!card->mpa_tx.buf) {
1709                 ret = -1;
1710                 goto error;
1711         }
1712 
1713         card->mpa_tx.buf_size = mpa_tx_buf_size;
1714 
1715         card->mpa_rx.buf = kzalloc(mpa_rx_buf_size, GFP_KERNEL);
1716         if (!card->mpa_rx.buf) {
1717                 ret = -1;
1718                 goto error;
1719         }
1720 
1721         card->mpa_rx.buf_size = mpa_rx_buf_size;
1722 
1723 error:
1724         if (ret) {
1725                 kfree(card->mpa_tx.buf);
1726                 kfree(card->mpa_rx.buf);
1727         }
1728 
1729         return ret;
1730 }
1731 
1732 /*
1733  * This function unregisters the SDIO device.
1734  *
1735  * The SDIO IRQ is released, the function is disabled and driver
1736  * data is set to null.
1737  */
1738 static void
1739 mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
1740 {
1741         struct sdio_mmc_card *card = adapter->card;
1742 
1743         if (adapter->card) {
1744                 sdio_claim_host(card->func);
1745                 sdio_disable_func(card->func);
1746                 sdio_release_host(card->func);
1747         }
1748 }
1749 
1750 /*
1751  * This function registers the SDIO device.
1752  *
1753  * SDIO IRQ is claimed, block size is set and driver data is initialized.
1754  */
1755 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
1756 {
1757         int ret;
1758         struct sdio_mmc_card *card = adapter->card;
1759         struct sdio_func *func = card->func;
1760 
1761         /* save adapter pointer in card */
1762         card->adapter = adapter;
1763 
1764         sdio_claim_host(func);
1765 
1766         /* Set block size */
1767         ret = sdio_set_block_size(card->func, MWIFIEX_SDIO_BLOCK_SIZE);
1768         sdio_release_host(func);
1769         if (ret) {
1770                 pr_err("cannot set SDIO block size\n");
1771                 return ret;
1772         }
1773 
1774 
1775         adapter->dev = &func->dev;
1776 
1777         strcpy(adapter->fw_name, card->firmware);
1778 
1779         return 0;
1780 }
1781 
1782 /*
1783  * This function initializes the SDIO driver.
1784  *
1785  * The following initializations steps are followed -
1786  *      - Read the Host interrupt status register to acknowledge
1787  *        the first interrupt got from bootloader
1788  *      - Disable host interrupt mask register
1789  *      - Get SDIO port
1790  *      - Initialize SDIO variables in card
1791  *      - Allocate MP registers
1792  *      - Allocate MPA Tx and Rx buffers
1793  */
1794 static int mwifiex_init_sdio(struct mwifiex_adapter *adapter)
1795 {
1796         struct sdio_mmc_card *card = adapter->card;
1797         const struct mwifiex_sdio_card_reg *reg = card->reg;
1798         int ret;
1799         u8 sdio_ireg;
1800 
1801         sdio_set_drvdata(card->func, card);
1802 
1803         /*
1804          * Read the HOST_INT_STATUS_REG for ACK the first interrupt got
1805          * from the bootloader. If we don't do this we get a interrupt
1806          * as soon as we register the irq.
1807          */
1808         mwifiex_read_reg(adapter, HOST_INTSTATUS_REG, &sdio_ireg);
1809 
1810         /* Get SDIO ioport */
1811         mwifiex_init_sdio_ioport(adapter);
1812 
1813         /* Initialize SDIO variables in card */
1814         card->mp_rd_bitmap = 0;
1815         card->mp_wr_bitmap = 0;
1816         card->curr_rd_port = reg->start_rd_port;
1817         card->curr_wr_port = reg->start_wr_port;
1818 
1819         card->mp_data_port_mask = reg->data_port_mask;
1820 
1821         card->mpa_tx.buf_len = 0;
1822         card->mpa_tx.pkt_cnt = 0;
1823         card->mpa_tx.start_port = 0;
1824 
1825         card->mpa_tx.enabled = 1;
1826         card->mpa_tx.pkt_aggr_limit = card->mp_agg_pkt_limit;
1827 
1828         card->mpa_rx.buf_len = 0;
1829         card->mpa_rx.pkt_cnt = 0;
1830         card->mpa_rx.start_port = 0;
1831 
1832         card->mpa_rx.enabled = 1;
1833         card->mpa_rx.pkt_aggr_limit = card->mp_agg_pkt_limit;
1834 
1835         /* Allocate buffers for SDIO MP-A */
1836         card->mp_regs = kzalloc(reg->max_mp_regs, GFP_KERNEL);
1837         if (!card->mp_regs)
1838                 return -ENOMEM;
1839 
1840         /* Allocate skb pointer buffers */
1841         card->mpa_rx.skb_arr = kzalloc((sizeof(void *)) *
1842                                        card->mp_agg_pkt_limit, GFP_KERNEL);
1843         card->mpa_rx.len_arr = kzalloc(sizeof(*card->mpa_rx.len_arr) *
1844                                        card->mp_agg_pkt_limit, GFP_KERNEL);
1845         ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
1846                                              SDIO_MP_TX_AGGR_DEF_BUF_SIZE,
1847                                              SDIO_MP_RX_AGGR_DEF_BUF_SIZE);
1848         if (ret) {
1849                 dev_err(adapter->dev, "failed to alloc sdio mp-a buffers\n");
1850                 kfree(card->mp_regs);
1851                 return -1;
1852         }
1853 
1854         return ret;
1855 }
1856 
1857 /*
1858  * This function resets the MPA Tx and Rx buffers.
1859  */
1860 static void mwifiex_cleanup_mpa_buf(struct mwifiex_adapter *adapter)
1861 {
1862         struct sdio_mmc_card *card = adapter->card;
1863 
1864         MP_TX_AGGR_BUF_RESET(card);
1865         MP_RX_AGGR_BUF_RESET(card);
1866 }
1867 
1868 /*
1869  * This function cleans up the allocated card buffers.
1870  *
1871  * The following are freed by this function -
1872  *      - MP registers
1873  *      - MPA Tx buffer
1874  *      - MPA Rx buffer
1875  */
1876 static void mwifiex_cleanup_sdio(struct mwifiex_adapter *adapter)
1877 {
1878         struct sdio_mmc_card *card = adapter->card;
1879 
1880         kfree(card->mp_regs);
1881         kfree(card->mpa_rx.skb_arr);
1882         kfree(card->mpa_rx.len_arr);
1883         kfree(card->mpa_tx.buf);
1884         kfree(card->mpa_rx.buf);
1885         sdio_set_drvdata(card->func, NULL);
1886         kfree(card);
1887 }
1888 
1889 /*
1890  * This function updates the MP end port in card.
1891  */
1892 static void
1893 mwifiex_update_mp_end_port(struct mwifiex_adapter *adapter, u16 port)
1894 {
1895         struct sdio_mmc_card *card = adapter->card;
1896         const struct mwifiex_sdio_card_reg *reg = card->reg;
1897         int i;
1898 
1899         card->mp_end_port = port;
1900 
1901         card->mp_data_port_mask = reg->data_port_mask;
1902 
1903         if (reg->start_wr_port) {
1904                 for (i = 1; i <= card->max_ports - card->mp_end_port; i++)
1905                         card->mp_data_port_mask &=
1906                                         ~(1 << (card->max_ports - i));
1907         }
1908 
1909         card->curr_wr_port = reg->start_wr_port;
1910 
1911         dev_dbg(adapter->dev, "cmd: mp_end_port %d, data port mask 0x%x\n",
1912                 port, card->mp_data_port_mask);
1913 }
1914 
1915 static struct mmc_host *reset_host;
1916 static void sdio_card_reset_worker(struct work_struct *work)
1917 {
1918         struct mmc_host *target = reset_host;
1919 
1920         /* The actual reset operation must be run outside of driver thread.
1921          * This is because mmc_remove_host() will cause the device to be
1922          * instantly destroyed, and the driver then needs to end its thread,
1923          * leading to a deadlock.
1924          *
1925          * We run it in a totally independent workqueue.
1926          */
1927 
1928         pr_err("Resetting card...\n");
1929         mmc_remove_host(target);
1930         /* 20ms delay is based on experiment with sdhci controller */
1931         mdelay(20);
1932         mmc_add_host(target);
1933 }
1934 static DECLARE_WORK(card_reset_work, sdio_card_reset_worker);
1935 
1936 /* This function resets the card */
1937 static void mwifiex_sdio_card_reset(struct mwifiex_adapter *adapter)
1938 {
1939         struct sdio_mmc_card *card = adapter->card;
1940 
1941         reset_host = card->func->card->host;
1942         schedule_work(&card_reset_work);
1943 }
1944 
1945 static struct mwifiex_if_ops sdio_ops = {
1946         .init_if = mwifiex_init_sdio,
1947         .cleanup_if = mwifiex_cleanup_sdio,
1948         .check_fw_status = mwifiex_check_fw_status,
1949         .prog_fw = mwifiex_prog_fw_w_helper,
1950         .register_dev = mwifiex_register_dev,
1951         .unregister_dev = mwifiex_unregister_dev,
1952         .enable_int = mwifiex_sdio_enable_host_int,
1953         .disable_int = mwifiex_sdio_disable_host_int,
1954         .process_int_status = mwifiex_process_int_status,
1955         .host_to_card = mwifiex_sdio_host_to_card,
1956         .wakeup = mwifiex_pm_wakeup_card,
1957         .wakeup_complete = mwifiex_pm_wakeup_card_complete,
1958 
1959         /* SDIO specific */
1960         .update_mp_end_port = mwifiex_update_mp_end_port,
1961         .cleanup_mpa_buf = mwifiex_cleanup_mpa_buf,
1962         .cmdrsp_complete = mwifiex_sdio_cmdrsp_complete,
1963         .event_complete = mwifiex_sdio_event_complete,
1964         .card_reset = mwifiex_sdio_card_reset,
1965 };
1966 
1967 /*
1968  * This function initializes the SDIO driver.
1969  *
1970  * This initiates the semaphore and registers the device with
1971  * SDIO bus.
1972  */
1973 static int
1974 mwifiex_sdio_init_module(void)
1975 {
1976         sema_init(&add_remove_card_sem, 1);
1977 
1978         /* Clear the flag in case user removes the card. */
1979         user_rmmod = 0;
1980 
1981         return sdio_register_driver(&mwifiex_sdio);
1982 }
1983 
1984 /*
1985  * This function cleans up the SDIO driver.
1986  *
1987  * The following major steps are followed for cleanup -
1988  *      - Resume the device if its suspended
1989  *      - Disconnect the device if connected
1990  *      - Shutdown the firmware
1991  *      - Unregister the device from SDIO bus.
1992  */
1993 static void
1994 mwifiex_sdio_cleanup_module(void)
1995 {
1996         if (!down_interruptible(&add_remove_card_sem))
1997                 up(&add_remove_card_sem);
1998 
1999         /* Set the flag as user is removing this module. */
2000         user_rmmod = 1;
2001 
2002         cancel_work_sync(&card_reset_work);
2003         sdio_unregister_driver(&mwifiex_sdio);
2004 }
2005 
2006 module_init(mwifiex_sdio_init_module);
2007 module_exit(mwifiex_sdio_cleanup_module);
2008 
2009 MODULE_AUTHOR("Marvell International Ltd.");
2010 MODULE_DESCRIPTION("Marvell WiFi-Ex SDIO Driver version " SDIO_VERSION);
2011 MODULE_VERSION(SDIO_VERSION);
2012 MODULE_LICENSE("GPL v2");
2013 MODULE_FIRMWARE(SD8786_DEFAULT_FW_NAME);
2014 MODULE_FIRMWARE(SD8787_DEFAULT_FW_NAME);
2015 MODULE_FIRMWARE(SD8797_DEFAULT_FW_NAME);
2016 MODULE_FIRMWARE(SD8897_DEFAULT_FW_NAME);
2017 

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