Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4

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

  1 /*
  2  * Marvell Wireless LAN device driver: SDIO specific handling
  3  *
  4  * Copyright (C) 2011-2014, 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 static unsigned long iface_work_flags;
 51 
 52 static struct semaphore add_remove_card_sem;
 53 
 54 static struct memory_type_mapping generic_mem_type_map[] = {
 55         {"DUMP", NULL, 0, 0xDD},
 56 };
 57 
 58 static struct memory_type_mapping mem_type_mapping_tbl[] = {
 59         {"ITCM", NULL, 0, 0xF0},
 60         {"DTCM", NULL, 0, 0xF1},
 61         {"SQRAM", NULL, 0, 0xF2},
 62         {"APU", NULL, 0, 0xF3},
 63         {"CIU", NULL, 0, 0xF4},
 64         {"ICU", NULL, 0, 0xF5},
 65         {"MAC", NULL, 0, 0xF6},
 66         {"EXT7", NULL, 0, 0xF7},
 67         {"EXT8", NULL, 0, 0xF8},
 68         {"EXT9", NULL, 0, 0xF9},
 69         {"EXT10", NULL, 0, 0xFA},
 70         {"EXT11", NULL, 0, 0xFB},
 71         {"EXT12", NULL, 0, 0xFC},
 72         {"EXT13", NULL, 0, 0xFD},
 73         {"EXTLAST", NULL, 0, 0xFE},
 74 };
 75 
 76 /*
 77  * SDIO probe.
 78  *
 79  * This function probes an mwifiex device and registers it. It allocates
 80  * the card structure, enables SDIO function number and initiates the
 81  * device registration and initialization procedure by adding a logical
 82  * interface.
 83  */
 84 static int
 85 mwifiex_sdio_probe(struct sdio_func *func, const struct sdio_device_id *id)
 86 {
 87         int ret;
 88         struct sdio_mmc_card *card = NULL;
 89 
 90         pr_debug("info: vendor=0x%4.04X device=0x%4.04X class=%d function=%d\n",
 91                  func->vendor, func->device, func->class, func->num);
 92 
 93         card = kzalloc(sizeof(struct sdio_mmc_card), GFP_KERNEL);
 94         if (!card)
 95                 return -ENOMEM;
 96 
 97         card->func = func;
 98         card->device_id = id;
 99 
100         func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
101 
102         if (id->driver_data) {
103                 struct mwifiex_sdio_device *data = (void *)id->driver_data;
104 
105                 card->firmware = data->firmware;
106                 card->reg = data->reg;
107                 card->max_ports = data->max_ports;
108                 card->mp_agg_pkt_limit = data->mp_agg_pkt_limit;
109                 card->supports_sdio_new_mode = data->supports_sdio_new_mode;
110                 card->has_control_mask = data->has_control_mask;
111                 card->tx_buf_size = data->tx_buf_size;
112                 card->mp_tx_agg_buf_size = data->mp_tx_agg_buf_size;
113                 card->mp_rx_agg_buf_size = data->mp_rx_agg_buf_size;
114                 card->can_dump_fw = data->can_dump_fw;
115                 card->fw_dump_enh = data->fw_dump_enh;
116                 card->can_auto_tdls = data->can_auto_tdls;
117                 card->can_ext_scan = data->can_ext_scan;
118         }
119 
120         sdio_claim_host(func);
121         ret = sdio_enable_func(func);
122         sdio_release_host(func);
123 
124         if (ret) {
125                 pr_err("%s: failed to enable function\n", __func__);
126                 kfree(card);
127                 return -EIO;
128         }
129 
130         if (mwifiex_add_card(card, &add_remove_card_sem, &sdio_ops,
131                              MWIFIEX_SDIO)) {
132                 pr_err("%s: add card failed\n", __func__);
133                 kfree(card);
134                 sdio_claim_host(func);
135                 ret = sdio_disable_func(func);
136                 sdio_release_host(func);
137                 ret = -1;
138         }
139 
140         return ret;
141 }
142 
143 /*
144  * SDIO resume.
145  *
146  * Kernel needs to suspend all functions separately. Therefore all
147  * registered functions must have drivers with suspend and resume
148  * methods. Failing that the kernel simply removes the whole card.
149  *
150  * If already not resumed, this function turns on the traffic and
151  * sends a host sleep cancel request to the firmware.
152  */
153 static int mwifiex_sdio_resume(struct device *dev)
154 {
155         struct sdio_func *func = dev_to_sdio_func(dev);
156         struct sdio_mmc_card *card;
157         struct mwifiex_adapter *adapter;
158         mmc_pm_flag_t pm_flag = 0;
159 
160         if (func) {
161                 pm_flag = sdio_get_host_pm_caps(func);
162                 card = sdio_get_drvdata(func);
163                 if (!card || !card->adapter) {
164                         pr_err("resume: invalid card or adapter\n");
165                         return 0;
166                 }
167         } else {
168                 pr_err("resume: sdio_func is not specified\n");
169                 return 0;
170         }
171 
172         adapter = card->adapter;
173 
174         if (!adapter->is_suspended) {
175                 mwifiex_dbg(adapter, WARN,
176                             "device already resumed\n");
177                 return 0;
178         }
179 
180         adapter->is_suspended = false;
181 
182         /* Disable Host Sleep */
183         mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
184                           MWIFIEX_ASYNC_CMD);
185 
186         return 0;
187 }
188 
189 /*
190  * SDIO remove.
191  *
192  * This function removes the interface and frees up the card structure.
193  */
194 static void
195 mwifiex_sdio_remove(struct sdio_func *func)
196 {
197         struct sdio_mmc_card *card;
198         struct mwifiex_adapter *adapter;
199         struct mwifiex_private *priv;
200 
201         card = sdio_get_drvdata(func);
202         if (!card)
203                 return;
204 
205         adapter = card->adapter;
206         if (!adapter || !adapter->priv_num)
207                 return;
208 
209         mwifiex_dbg(adapter, INFO, "info: SDIO func num=%d\n", func->num);
210 
211         if (user_rmmod) {
212                 if (adapter->is_suspended)
213                         mwifiex_sdio_resume(adapter->dev);
214 
215                 mwifiex_deauthenticate_all(adapter);
216 
217                 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
218                 mwifiex_disable_auto_ds(priv);
219                 mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
220         }
221 
222         mwifiex_remove_card(card->adapter, &add_remove_card_sem);
223 }
224 
225 /*
226  * SDIO suspend.
227  *
228  * Kernel needs to suspend all functions separately. Therefore all
229  * registered functions must have drivers with suspend and resume
230  * methods. Failing that the kernel simply removes the whole card.
231  *
232  * If already not suspended, this function allocates and sends a host
233  * sleep activate request to the firmware and turns off the traffic.
234  */
235 static int mwifiex_sdio_suspend(struct device *dev)
236 {
237         struct sdio_func *func = dev_to_sdio_func(dev);
238         struct sdio_mmc_card *card;
239         struct mwifiex_adapter *adapter;
240         mmc_pm_flag_t pm_flag = 0;
241         int ret = 0;
242 
243         if (func) {
244                 pm_flag = sdio_get_host_pm_caps(func);
245                 pr_debug("cmd: %s: suspend: PM flag = 0x%x\n",
246                          sdio_func_id(func), pm_flag);
247                 if (!(pm_flag & MMC_PM_KEEP_POWER)) {
248                         pr_err("%s: cannot remain alive while host is"
249                                 " suspended\n", sdio_func_id(func));
250                         return -ENOSYS;
251                 }
252 
253                 card = sdio_get_drvdata(func);
254                 if (!card || !card->adapter) {
255                         pr_err("suspend: invalid card or adapter\n");
256                         return 0;
257                 }
258         } else {
259                 pr_err("suspend: sdio_func is not specified\n");
260                 return 0;
261         }
262 
263         adapter = card->adapter;
264 
265         /* Enable the Host Sleep */
266         if (!mwifiex_enable_hs(adapter)) {
267                 mwifiex_dbg(adapter, ERROR,
268                             "cmd: failed to suspend\n");
269                 adapter->hs_enabling = false;
270                 return -EFAULT;
271         }
272 
273         mwifiex_dbg(adapter, INFO,
274                     "cmd: suspend with MMC_PM_KEEP_POWER\n");
275         ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
276 
277         /* Indicate device suspended */
278         adapter->is_suspended = true;
279         adapter->hs_enabling = false;
280 
281         return ret;
282 }
283 
284 /* Device ID for SD8786 */
285 #define SDIO_DEVICE_ID_MARVELL_8786   (0x9116)
286 /* Device ID for SD8787 */
287 #define SDIO_DEVICE_ID_MARVELL_8787   (0x9119)
288 /* Device ID for SD8797 */
289 #define SDIO_DEVICE_ID_MARVELL_8797   (0x9129)
290 /* Device ID for SD8897 */
291 #define SDIO_DEVICE_ID_MARVELL_8897   (0x912d)
292 /* Device ID for SD8887 */
293 #define SDIO_DEVICE_ID_MARVELL_8887   (0x9135)
294 /* Device ID for SD8801 */
295 #define SDIO_DEVICE_ID_MARVELL_8801   (0x9139)
296 /* Device ID for SD8997 */
297 #define SDIO_DEVICE_ID_MARVELL_8997   (0x9141)
298 
299 
300 /* WLAN IDs */
301 static const struct sdio_device_id mwifiex_ids[] = {
302         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8786),
303                 .driver_data = (unsigned long) &mwifiex_sdio_sd8786},
304         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8787),
305                 .driver_data = (unsigned long) &mwifiex_sdio_sd8787},
306         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797),
307                 .driver_data = (unsigned long) &mwifiex_sdio_sd8797},
308         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8897),
309                 .driver_data = (unsigned long) &mwifiex_sdio_sd8897},
310         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8887),
311                 .driver_data = (unsigned long)&mwifiex_sdio_sd8887},
312         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8801),
313                 .driver_data = (unsigned long)&mwifiex_sdio_sd8801},
314         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8997),
315                 .driver_data = (unsigned long)&mwifiex_sdio_sd8997},
316         {},
317 };
318 
319 MODULE_DEVICE_TABLE(sdio, mwifiex_ids);
320 
321 static const struct dev_pm_ops mwifiex_sdio_pm_ops = {
322         .suspend = mwifiex_sdio_suspend,
323         .resume = mwifiex_sdio_resume,
324 };
325 
326 static struct sdio_driver mwifiex_sdio = {
327         .name = "mwifiex_sdio",
328         .id_table = mwifiex_ids,
329         .probe = mwifiex_sdio_probe,
330         .remove = mwifiex_sdio_remove,
331         .drv = {
332                 .owner = THIS_MODULE,
333                 .pm = &mwifiex_sdio_pm_ops,
334         }
335 };
336 
337 /* Write data into SDIO card register. Caller claims SDIO device. */
338 static int
339 mwifiex_write_reg_locked(struct sdio_func *func, u32 reg, u8 data)
340 {
341         int ret = -1;
342         sdio_writeb(func, data, reg, &ret);
343         return ret;
344 }
345 
346 /*
347  * This function writes data into SDIO card register.
348  */
349 static int
350 mwifiex_write_reg(struct mwifiex_adapter *adapter, u32 reg, u8 data)
351 {
352         struct sdio_mmc_card *card = adapter->card;
353         int ret;
354 
355         sdio_claim_host(card->func);
356         ret = mwifiex_write_reg_locked(card->func, reg, data);
357         sdio_release_host(card->func);
358 
359         return ret;
360 }
361 
362 /*
363  * This function reads data from SDIO card register.
364  */
365 static int
366 mwifiex_read_reg(struct mwifiex_adapter *adapter, u32 reg, u8 *data)
367 {
368         struct sdio_mmc_card *card = adapter->card;
369         int ret = -1;
370         u8 val;
371 
372         sdio_claim_host(card->func);
373         val = sdio_readb(card->func, reg, &ret);
374         sdio_release_host(card->func);
375 
376         *data = val;
377 
378         return ret;
379 }
380 
381 /*
382  * This function writes multiple data into SDIO card memory.
383  *
384  * This does not work in suspended mode.
385  */
386 static int
387 mwifiex_write_data_sync(struct mwifiex_adapter *adapter,
388                         u8 *buffer, u32 pkt_len, u32 port)
389 {
390         struct sdio_mmc_card *card = adapter->card;
391         int ret;
392         u8 blk_mode =
393                 (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE : BLOCK_MODE;
394         u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
395         u32 blk_cnt =
396                 (blk_mode ==
397                  BLOCK_MODE) ? (pkt_len /
398                                 MWIFIEX_SDIO_BLOCK_SIZE) : pkt_len;
399         u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
400 
401         if (adapter->is_suspended) {
402                 mwifiex_dbg(adapter, ERROR,
403                             "%s: not allowed while suspended\n", __func__);
404                 return -1;
405         }
406 
407         sdio_claim_host(card->func);
408 
409         ret = sdio_writesb(card->func, ioport, buffer, blk_cnt * blk_size);
410 
411         sdio_release_host(card->func);
412 
413         return ret;
414 }
415 
416 /*
417  * This function reads multiple data from SDIO card memory.
418  */
419 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *buffer,
420                                   u32 len, u32 port, u8 claim)
421 {
422         struct sdio_mmc_card *card = adapter->card;
423         int ret;
424         u8 blk_mode = (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE
425                        : BLOCK_MODE;
426         u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
427         u32 blk_cnt = (blk_mode == BLOCK_MODE) ? (len / MWIFIEX_SDIO_BLOCK_SIZE)
428                         : len;
429         u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
430 
431         if (claim)
432                 sdio_claim_host(card->func);
433 
434         ret = sdio_readsb(card->func, buffer, ioport, blk_cnt * blk_size);
435 
436         if (claim)
437                 sdio_release_host(card->func);
438 
439         return ret;
440 }
441 
442 /*
443  * This function wakes up the card.
444  *
445  * A host power up command is written to the card configuration
446  * register to wake up the card.
447  */
448 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
449 {
450         mwifiex_dbg(adapter, EVENT,
451                     "event: wakeup device...\n");
452 
453         return mwifiex_write_reg(adapter, CONFIGURATION_REG, HOST_POWER_UP);
454 }
455 
456 /*
457  * This function is called after the card has woken up.
458  *
459  * The card configuration register is reset.
460  */
461 static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
462 {
463         mwifiex_dbg(adapter, EVENT,
464                     "cmd: wakeup device completed\n");
465 
466         return mwifiex_write_reg(adapter, CONFIGURATION_REG, 0);
467 }
468 
469 /*
470  * This function is used to initialize IO ports for the
471  * chipsets supporting SDIO new mode eg SD8897.
472  */
473 static int mwifiex_init_sdio_new_mode(struct mwifiex_adapter *adapter)
474 {
475         u8 reg;
476         struct sdio_mmc_card *card = adapter->card;
477 
478         adapter->ioport = MEM_PORT;
479 
480         /* enable sdio new mode */
481         if (mwifiex_read_reg(adapter, card->reg->card_cfg_2_1_reg, &reg))
482                 return -1;
483         if (mwifiex_write_reg(adapter, card->reg->card_cfg_2_1_reg,
484                               reg | CMD53_NEW_MODE))
485                 return -1;
486 
487         /* Configure cmd port and enable reading rx length from the register */
488         if (mwifiex_read_reg(adapter, card->reg->cmd_cfg_0, &reg))
489                 return -1;
490         if (mwifiex_write_reg(adapter, card->reg->cmd_cfg_0,
491                               reg | CMD_PORT_RD_LEN_EN))
492                 return -1;
493 
494         /* Enable Dnld/Upld ready auto reset for cmd port after cmd53 is
495          * completed
496          */
497         if (mwifiex_read_reg(adapter, card->reg->cmd_cfg_1, &reg))
498                 return -1;
499         if (mwifiex_write_reg(adapter, card->reg->cmd_cfg_1,
500                               reg | CMD_PORT_AUTO_EN))
501                 return -1;
502 
503         return 0;
504 }
505 
506 /* This function initializes the IO ports.
507  *
508  * The following operations are performed -
509  *      - Read the IO ports (0, 1 and 2)
510  *      - Set host interrupt Reset-To-Read to clear
511  *      - Set auto re-enable interrupt
512  */
513 static int mwifiex_init_sdio_ioport(struct mwifiex_adapter *adapter)
514 {
515         u8 reg;
516         struct sdio_mmc_card *card = adapter->card;
517 
518         adapter->ioport = 0;
519 
520         if (card->supports_sdio_new_mode) {
521                 if (mwifiex_init_sdio_new_mode(adapter))
522                         return -1;
523                 goto cont;
524         }
525 
526         /* Read the IO port */
527         if (!mwifiex_read_reg(adapter, card->reg->io_port_0_reg, &reg))
528                 adapter->ioport |= (reg & 0xff);
529         else
530                 return -1;
531 
532         if (!mwifiex_read_reg(adapter, card->reg->io_port_1_reg, &reg))
533                 adapter->ioport |= ((reg & 0xff) << 8);
534         else
535                 return -1;
536 
537         if (!mwifiex_read_reg(adapter, card->reg->io_port_2_reg, &reg))
538                 adapter->ioport |= ((reg & 0xff) << 16);
539         else
540                 return -1;
541 cont:
542         mwifiex_dbg(adapter, INFO,
543                     "info: SDIO FUNC1 IO port: %#x\n", adapter->ioport);
544 
545         /* Set Host interrupt reset to read to clear */
546         if (!mwifiex_read_reg(adapter, card->reg->host_int_rsr_reg, &reg))
547                 mwifiex_write_reg(adapter, card->reg->host_int_rsr_reg,
548                                   reg | card->reg->sdio_int_mask);
549         else
550                 return -1;
551 
552         /* Dnld/Upld ready set to auto reset */
553         if (!mwifiex_read_reg(adapter, card->reg->card_misc_cfg_reg, &reg))
554                 mwifiex_write_reg(adapter, card->reg->card_misc_cfg_reg,
555                                   reg | AUTO_RE_ENABLE_INT);
556         else
557                 return -1;
558 
559         return 0;
560 }
561 
562 /*
563  * This function sends data to the card.
564  */
565 static int mwifiex_write_data_to_card(struct mwifiex_adapter *adapter,
566                                       u8 *payload, u32 pkt_len, u32 port)
567 {
568         u32 i = 0;
569         int ret;
570 
571         do {
572                 ret = mwifiex_write_data_sync(adapter, payload, pkt_len, port);
573                 if (ret) {
574                         i++;
575                         mwifiex_dbg(adapter, ERROR,
576                                     "host_to_card, write iomem\t"
577                                     "(%d) failed: %d\n", i, ret);
578                         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
579                                 mwifiex_dbg(adapter, ERROR,
580                                             "write CFG reg failed\n");
581 
582                         ret = -1;
583                         if (i > MAX_WRITE_IOMEM_RETRY)
584                                 return ret;
585                 }
586         } while (ret == -1);
587 
588         return ret;
589 }
590 
591 /*
592  * This function gets the read port.
593  *
594  * If control port bit is set in MP read bitmap, the control port
595  * is returned, otherwise the current read port is returned and
596  * the value is increased (provided it does not reach the maximum
597  * limit, in which case it is reset to 1)
598  */
599 static int mwifiex_get_rd_port(struct mwifiex_adapter *adapter, u8 *port)
600 {
601         struct sdio_mmc_card *card = adapter->card;
602         const struct mwifiex_sdio_card_reg *reg = card->reg;
603         u32 rd_bitmap = card->mp_rd_bitmap;
604 
605         mwifiex_dbg(adapter, DATA,
606                     "data: mp_rd_bitmap=0x%08x\n", rd_bitmap);
607 
608         if (card->supports_sdio_new_mode) {
609                 if (!(rd_bitmap & reg->data_port_mask))
610                         return -1;
611         } else {
612                 if (!(rd_bitmap & (CTRL_PORT_MASK | reg->data_port_mask)))
613                         return -1;
614         }
615 
616         if ((card->has_control_mask) &&
617             (card->mp_rd_bitmap & CTRL_PORT_MASK)) {
618                 card->mp_rd_bitmap &= (u32) (~CTRL_PORT_MASK);
619                 *port = CTRL_PORT;
620                 mwifiex_dbg(adapter, DATA,
621                             "data: port=%d mp_rd_bitmap=0x%08x\n",
622                             *port, card->mp_rd_bitmap);
623                 return 0;
624         }
625 
626         if (!(card->mp_rd_bitmap & (1 << card->curr_rd_port)))
627                 return -1;
628 
629         /* We are now handling the SDIO data ports */
630         card->mp_rd_bitmap &= (u32)(~(1 << card->curr_rd_port));
631         *port = card->curr_rd_port;
632 
633         if (++card->curr_rd_port == card->max_ports)
634                 card->curr_rd_port = reg->start_rd_port;
635 
636         mwifiex_dbg(adapter, DATA,
637                     "data: port=%d mp_rd_bitmap=0x%08x -> 0x%08x\n",
638                     *port, rd_bitmap, card->mp_rd_bitmap);
639 
640         return 0;
641 }
642 
643 /*
644  * This function gets the write port for data.
645  *
646  * The current write port is returned if available and the value is
647  * increased (provided it does not reach the maximum limit, in which
648  * case it is reset to 1)
649  */
650 static int mwifiex_get_wr_port_data(struct mwifiex_adapter *adapter, u32 *port)
651 {
652         struct sdio_mmc_card *card = adapter->card;
653         const struct mwifiex_sdio_card_reg *reg = card->reg;
654         u32 wr_bitmap = card->mp_wr_bitmap;
655 
656         mwifiex_dbg(adapter, DATA,
657                     "data: mp_wr_bitmap=0x%08x\n", wr_bitmap);
658 
659         if (!(wr_bitmap & card->mp_data_port_mask)) {
660                 adapter->data_sent = true;
661                 return -EBUSY;
662         }
663 
664         if (card->mp_wr_bitmap & (1 << card->curr_wr_port)) {
665                 card->mp_wr_bitmap &= (u32) (~(1 << card->curr_wr_port));
666                 *port = card->curr_wr_port;
667                 if (++card->curr_wr_port == card->mp_end_port)
668                         card->curr_wr_port = reg->start_wr_port;
669         } else {
670                 adapter->data_sent = true;
671                 return -EBUSY;
672         }
673 
674         if ((card->has_control_mask) && (*port == CTRL_PORT)) {
675                 mwifiex_dbg(adapter, ERROR,
676                             "invalid data port=%d cur port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
677                             *port, card->curr_wr_port, wr_bitmap,
678                             card->mp_wr_bitmap);
679                 return -1;
680         }
681 
682         mwifiex_dbg(adapter, DATA,
683                     "data: port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
684                     *port, wr_bitmap, card->mp_wr_bitmap);
685 
686         return 0;
687 }
688 
689 /*
690  * This function polls the card status.
691  */
692 static int
693 mwifiex_sdio_poll_card_status(struct mwifiex_adapter *adapter, u8 bits)
694 {
695         struct sdio_mmc_card *card = adapter->card;
696         u32 tries;
697         u8 cs;
698 
699         for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
700                 if (mwifiex_read_reg(adapter, card->reg->poll_reg, &cs))
701                         break;
702                 else if ((cs & bits) == bits)
703                         return 0;
704 
705                 usleep_range(10, 20);
706         }
707 
708         mwifiex_dbg(adapter, ERROR,
709                     "poll card status failed, tries = %d\n", tries);
710 
711         return -1;
712 }
713 
714 /*
715  * This function reads the firmware status.
716  */
717 static int
718 mwifiex_sdio_read_fw_status(struct mwifiex_adapter *adapter, u16 *dat)
719 {
720         struct sdio_mmc_card *card = adapter->card;
721         const struct mwifiex_sdio_card_reg *reg = card->reg;
722         u8 fws0, fws1;
723 
724         if (mwifiex_read_reg(adapter, reg->status_reg_0, &fws0))
725                 return -1;
726 
727         if (mwifiex_read_reg(adapter, reg->status_reg_1, &fws1))
728                 return -1;
729 
730         *dat = (u16) ((fws1 << 8) | fws0);
731 
732         return 0;
733 }
734 
735 /*
736  * This function disables the host interrupt.
737  *
738  * The host interrupt mask is read, the disable bit is reset and
739  * written back to the card host interrupt mask register.
740  */
741 static void mwifiex_sdio_disable_host_int(struct mwifiex_adapter *adapter)
742 {
743         struct sdio_mmc_card *card = adapter->card;
744         struct sdio_func *func = card->func;
745 
746         sdio_claim_host(func);
747         mwifiex_write_reg_locked(func, card->reg->host_int_mask_reg, 0);
748         sdio_release_irq(func);
749         sdio_release_host(func);
750 }
751 
752 /*
753  * This function reads the interrupt status from card.
754  */
755 static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter)
756 {
757         struct sdio_mmc_card *card = adapter->card;
758         u8 sdio_ireg;
759         unsigned long flags;
760 
761         if (mwifiex_read_data_sync(adapter, card->mp_regs,
762                                    card->reg->max_mp_regs,
763                                    REG_PORT | MWIFIEX_SDIO_BYTE_MODE_MASK, 0)) {
764                 mwifiex_dbg(adapter, ERROR, "read mp_regs failed\n");
765                 return;
766         }
767 
768         sdio_ireg = card->mp_regs[card->reg->host_int_status_reg];
769         if (sdio_ireg) {
770                 /*
771                  * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
772                  * For SDIO new mode CMD port interrupts
773                  *      DN_LD_CMD_PORT_HOST_INT_STATUS and/or
774                  *      UP_LD_CMD_PORT_HOST_INT_STATUS
775                  * Clear the interrupt status register
776                  */
777                 mwifiex_dbg(adapter, INTR,
778                             "int: sdio_ireg = %#x\n", sdio_ireg);
779                 spin_lock_irqsave(&adapter->int_lock, flags);
780                 adapter->int_status |= sdio_ireg;
781                 spin_unlock_irqrestore(&adapter->int_lock, flags);
782         }
783 }
784 
785 /*
786  * SDIO interrupt handler.
787  *
788  * This function reads the interrupt status from firmware and handles
789  * the interrupt in current thread (ksdioirqd) right away.
790  */
791 static void
792 mwifiex_sdio_interrupt(struct sdio_func *func)
793 {
794         struct mwifiex_adapter *adapter;
795         struct sdio_mmc_card *card;
796 
797         card = sdio_get_drvdata(func);
798         if (!card || !card->adapter) {
799                 pr_debug("int: func=%p card=%p adapter=%p\n",
800                          func, card, card ? card->adapter : NULL);
801                 return;
802         }
803         adapter = card->adapter;
804 
805         if (!adapter->pps_uapsd_mode && adapter->ps_state == PS_STATE_SLEEP)
806                 adapter->ps_state = PS_STATE_AWAKE;
807 
808         mwifiex_interrupt_status(adapter);
809         mwifiex_main_process(adapter);
810 }
811 
812 /*
813  * This function enables the host interrupt.
814  *
815  * The host interrupt enable mask is written to the card
816  * host interrupt mask register.
817  */
818 static int mwifiex_sdio_enable_host_int(struct mwifiex_adapter *adapter)
819 {
820         struct sdio_mmc_card *card = adapter->card;
821         struct sdio_func *func = card->func;
822         int ret;
823 
824         sdio_claim_host(func);
825 
826         /* Request the SDIO IRQ */
827         ret = sdio_claim_irq(func, mwifiex_sdio_interrupt);
828         if (ret) {
829                 mwifiex_dbg(adapter, ERROR,
830                             "claim irq failed: ret=%d\n", ret);
831                 goto out;
832         }
833 
834         /* Simply write the mask to the register */
835         ret = mwifiex_write_reg_locked(func, card->reg->host_int_mask_reg,
836                                        card->reg->host_int_enable);
837         if (ret) {
838                 mwifiex_dbg(adapter, ERROR,
839                             "enable host interrupt failed\n");
840                 sdio_release_irq(func);
841         }
842 
843 out:
844         sdio_release_host(func);
845         return ret;
846 }
847 
848 /*
849  * This function sends a data buffer to the card.
850  */
851 static int mwifiex_sdio_card_to_host(struct mwifiex_adapter *adapter,
852                                      u32 *type, u8 *buffer,
853                                      u32 npayload, u32 ioport)
854 {
855         int ret;
856         u32 nb;
857 
858         if (!buffer) {
859                 mwifiex_dbg(adapter, ERROR,
860                             "%s: buffer is NULL\n", __func__);
861                 return -1;
862         }
863 
864         ret = mwifiex_read_data_sync(adapter, buffer, npayload, ioport, 1);
865 
866         if (ret) {
867                 mwifiex_dbg(adapter, ERROR,
868                             "%s: read iomem failed: %d\n", __func__,
869                         ret);
870                 return -1;
871         }
872 
873         nb = le16_to_cpu(*(__le16 *) (buffer));
874         if (nb > npayload) {
875                 mwifiex_dbg(adapter, ERROR,
876                             "%s: invalid packet, nb=%d npayload=%d\n",
877                             __func__, nb, npayload);
878                 return -1;
879         }
880 
881         *type = le16_to_cpu(*(__le16 *) (buffer + 2));
882 
883         return ret;
884 }
885 
886 /*
887  * This function downloads the firmware to the card.
888  *
889  * Firmware is downloaded to the card in blocks. Every block download
890  * is tested for CRC errors, and retried a number of times before
891  * returning failure.
892  */
893 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
894                                     struct mwifiex_fw_image *fw)
895 {
896         struct sdio_mmc_card *card = adapter->card;
897         const struct mwifiex_sdio_card_reg *reg = card->reg;
898         int ret;
899         u8 *firmware = fw->fw_buf;
900         u32 firmware_len = fw->fw_len;
901         u32 offset = 0;
902         u8 base0, base1;
903         u8 *fwbuf;
904         u16 len = 0;
905         u32 txlen, tx_blocks = 0, tries;
906         u32 i = 0;
907 
908         if (!firmware_len) {
909                 mwifiex_dbg(adapter, ERROR,
910                             "firmware image not found! Terminating download\n");
911                 return -1;
912         }
913 
914         mwifiex_dbg(adapter, INFO,
915                     "info: downloading FW image (%d bytes)\n",
916                     firmware_len);
917 
918         /* Assume that the allocated buffer is 8-byte aligned */
919         fwbuf = kzalloc(MWIFIEX_UPLD_SIZE, GFP_KERNEL);
920         if (!fwbuf)
921                 return -ENOMEM;
922 
923         sdio_claim_host(card->func);
924 
925         /* Perform firmware data transfer */
926         do {
927                 /* The host polls for the DN_LD_CARD_RDY and CARD_IO_READY
928                    bits */
929                 ret = mwifiex_sdio_poll_card_status(adapter, CARD_IO_READY |
930                                                     DN_LD_CARD_RDY);
931                 if (ret) {
932                         mwifiex_dbg(adapter, ERROR,
933                                     "FW download with helper:\t"
934                                     "poll status timeout @ %d\n", offset);
935                         goto done;
936                 }
937 
938                 /* More data? */
939                 if (offset >= firmware_len)
940                         break;
941 
942                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
943                         ret = mwifiex_read_reg(adapter, reg->base_0_reg,
944                                                &base0);
945                         if (ret) {
946                                 mwifiex_dbg(adapter, ERROR,
947                                             "dev BASE0 register read failed:\t"
948                                             "base0=%#04X(%d). Terminating dnld\n",
949                                             base0, base0);
950                                 goto done;
951                         }
952                         ret = mwifiex_read_reg(adapter, reg->base_1_reg,
953                                                &base1);
954                         if (ret) {
955                                 mwifiex_dbg(adapter, ERROR,
956                                             "dev BASE1 register read failed:\t"
957                                             "base1=%#04X(%d). Terminating dnld\n",
958                                             base1, base1);
959                                 goto done;
960                         }
961                         len = (u16) (((base1 & 0xff) << 8) | (base0 & 0xff));
962 
963                         if (len)
964                                 break;
965 
966                         usleep_range(10, 20);
967                 }
968 
969                 if (!len) {
970                         break;
971                 } else if (len > MWIFIEX_UPLD_SIZE) {
972                         mwifiex_dbg(adapter, ERROR,
973                                     "FW dnld failed @ %d, invalid length %d\n",
974                                     offset, len);
975                         ret = -1;
976                         goto done;
977                 }
978 
979                 txlen = len;
980 
981                 if (len & BIT(0)) {
982                         i++;
983                         if (i > MAX_WRITE_IOMEM_RETRY) {
984                                 mwifiex_dbg(adapter, ERROR,
985                                             "FW dnld failed @ %d, over max retry\n",
986                                             offset);
987                                 ret = -1;
988                                 goto done;
989                         }
990                         mwifiex_dbg(adapter, ERROR,
991                                     "CRC indicated by the helper:\t"
992                                     "len = 0x%04X, txlen = %d\n", len, txlen);
993                         len &= ~BIT(0);
994                         /* Setting this to 0 to resend from same offset */
995                         txlen = 0;
996                 } else {
997                         i = 0;
998 
999                         /* Set blocksize to transfer - checking for last
1000                            block */
1001                         if (firmware_len - offset < txlen)
1002                                 txlen = firmware_len - offset;
1003 
1004                         tx_blocks = (txlen + MWIFIEX_SDIO_BLOCK_SIZE - 1)
1005                                     / MWIFIEX_SDIO_BLOCK_SIZE;
1006 
1007                         /* Copy payload to buffer */
1008                         memmove(fwbuf, &firmware[offset], txlen);
1009                 }
1010 
1011                 ret = mwifiex_write_data_sync(adapter, fwbuf, tx_blocks *
1012                                               MWIFIEX_SDIO_BLOCK_SIZE,
1013                                               adapter->ioport);
1014                 if (ret) {
1015                         mwifiex_dbg(adapter, ERROR,
1016                                     "FW download, write iomem (%d) failed @ %d\n",
1017                                     i, offset);
1018                         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
1019                                 mwifiex_dbg(adapter, ERROR,
1020                                             "write CFG reg failed\n");
1021 
1022                         ret = -1;
1023                         goto done;
1024                 }
1025 
1026                 offset += txlen;
1027         } while (true);
1028 
1029         sdio_release_host(card->func);
1030 
1031         mwifiex_dbg(adapter, MSG,
1032                     "info: FW download over, size %d bytes\n", offset);
1033 
1034         ret = 0;
1035 done:
1036         kfree(fwbuf);
1037         return ret;
1038 }
1039 
1040 /*
1041  * This function checks the firmware status in card.
1042  *
1043  * The winner interface is also determined by this function.
1044  */
1045 static int mwifiex_check_fw_status(struct mwifiex_adapter *adapter,
1046                                    u32 poll_num)
1047 {
1048         struct sdio_mmc_card *card = adapter->card;
1049         int ret = 0;
1050         u16 firmware_stat;
1051         u32 tries;
1052         u8 winner_status;
1053 
1054         /* Wait for firmware initialization event */
1055         for (tries = 0; tries < poll_num; tries++) {
1056                 ret = mwifiex_sdio_read_fw_status(adapter, &firmware_stat);
1057                 if (ret)
1058                         continue;
1059                 if (firmware_stat == FIRMWARE_READY_SDIO) {
1060                         ret = 0;
1061                         break;
1062                 } else {
1063                         msleep(100);
1064                         ret = -1;
1065                 }
1066         }
1067 
1068         if (ret) {
1069                 if (mwifiex_read_reg
1070                     (adapter, card->reg->status_reg_0, &winner_status))
1071                         winner_status = 0;
1072 
1073                 if (winner_status)
1074                         adapter->winner = 0;
1075                 else
1076                         adapter->winner = 1;
1077         }
1078         return ret;
1079 }
1080 
1081 /*
1082  * This function decode sdio aggreation pkt.
1083  *
1084  * Based on the the data block size and pkt_len,
1085  * skb data will be decoded to few packets.
1086  */
1087 static void mwifiex_deaggr_sdio_pkt(struct mwifiex_adapter *adapter,
1088                                     struct sk_buff *skb)
1089 {
1090         u32 total_pkt_len, pkt_len;
1091         struct sk_buff *skb_deaggr;
1092         u32 pkt_type;
1093         u16 blk_size;
1094         u8 blk_num;
1095         u8 *data;
1096 
1097         data = skb->data;
1098         total_pkt_len = skb->len;
1099 
1100         while (total_pkt_len >= (SDIO_HEADER_OFFSET + INTF_HEADER_LEN)) {
1101                 if (total_pkt_len < adapter->sdio_rx_block_size)
1102                         break;
1103                 blk_num = *(data + BLOCK_NUMBER_OFFSET);
1104                 blk_size = adapter->sdio_rx_block_size * blk_num;
1105                 if (blk_size > total_pkt_len) {
1106                         mwifiex_dbg(adapter, ERROR,
1107                                     "%s: error in blk_size,\t"
1108                                     "blk_num=%d, blk_size=%d, total_pkt_len=%d\n",
1109                                     __func__, blk_num, blk_size, total_pkt_len);
1110                         break;
1111                 }
1112                 pkt_len = le16_to_cpu(*(__le16 *)(data + SDIO_HEADER_OFFSET));
1113                 pkt_type = le16_to_cpu(*(__le16 *)(data + SDIO_HEADER_OFFSET +
1114                                          2));
1115                 if ((pkt_len + SDIO_HEADER_OFFSET) > blk_size) {
1116                         mwifiex_dbg(adapter, ERROR,
1117                                     "%s: error in pkt_len,\t"
1118                                     "pkt_len=%d, blk_size=%d\n",
1119                                     __func__, pkt_len, blk_size);
1120                         break;
1121                 }
1122                 skb_deaggr = mwifiex_alloc_dma_align_buf(pkt_len,
1123                                                          GFP_KERNEL | GFP_DMA);
1124                 if (!skb_deaggr)
1125                         break;
1126                 skb_put(skb_deaggr, pkt_len);
1127                 memcpy(skb_deaggr->data, data + SDIO_HEADER_OFFSET, pkt_len);
1128                 skb_pull(skb_deaggr, INTF_HEADER_LEN);
1129 
1130                 mwifiex_handle_rx_packet(adapter, skb_deaggr);
1131                 data += blk_size;
1132                 total_pkt_len -= blk_size;
1133         }
1134 }
1135 
1136 /*
1137  * This function decodes a received packet.
1138  *
1139  * Based on the type, the packet is treated as either a data, or
1140  * a command response, or an event, and the correct handler
1141  * function is invoked.
1142  */
1143 static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter,
1144                                     struct sk_buff *skb, u32 upld_typ)
1145 {
1146         u8 *cmd_buf;
1147         __le16 *curr_ptr = (__le16 *)skb->data;
1148         u16 pkt_len = le16_to_cpu(*curr_ptr);
1149         struct mwifiex_rxinfo *rx_info;
1150 
1151         if (upld_typ != MWIFIEX_TYPE_AGGR_DATA) {
1152                 skb_trim(skb, pkt_len);
1153                 skb_pull(skb, INTF_HEADER_LEN);
1154         }
1155 
1156         switch (upld_typ) {
1157         case MWIFIEX_TYPE_AGGR_DATA:
1158                 mwifiex_dbg(adapter, INFO,
1159                             "info: --- Rx: Aggr Data packet ---\n");
1160                 rx_info = MWIFIEX_SKB_RXCB(skb);
1161                 rx_info->buf_type = MWIFIEX_TYPE_AGGR_DATA;
1162                 if (adapter->rx_work_enabled) {
1163                         skb_queue_tail(&adapter->rx_data_q, skb);
1164                         atomic_inc(&adapter->rx_pending);
1165                         adapter->data_received = true;
1166                 } else {
1167                         mwifiex_deaggr_sdio_pkt(adapter, skb);
1168                         dev_kfree_skb_any(skb);
1169                 }
1170                 break;
1171 
1172         case MWIFIEX_TYPE_DATA:
1173                 mwifiex_dbg(adapter, DATA,
1174                             "info: --- Rx: Data packet ---\n");
1175                 if (adapter->rx_work_enabled) {
1176                         skb_queue_tail(&adapter->rx_data_q, skb);
1177                         adapter->data_received = true;
1178                         atomic_inc(&adapter->rx_pending);
1179                 } else {
1180                         mwifiex_handle_rx_packet(adapter, skb);
1181                 }
1182                 break;
1183 
1184         case MWIFIEX_TYPE_CMD:
1185                 mwifiex_dbg(adapter, CMD,
1186                             "info: --- Rx: Cmd Response ---\n");
1187                 /* take care of curr_cmd = NULL case */
1188                 if (!adapter->curr_cmd) {
1189                         cmd_buf = adapter->upld_buf;
1190 
1191                         if (adapter->ps_state == PS_STATE_SLEEP_CFM)
1192                                 mwifiex_process_sleep_confirm_resp(adapter,
1193                                                                    skb->data,
1194                                                                    skb->len);
1195 
1196                         memcpy(cmd_buf, skb->data,
1197                                min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER,
1198                                      skb->len));
1199 
1200                         dev_kfree_skb_any(skb);
1201                 } else {
1202                         adapter->cmd_resp_received = true;
1203                         adapter->curr_cmd->resp_skb = skb;
1204                 }
1205                 break;
1206 
1207         case MWIFIEX_TYPE_EVENT:
1208                 mwifiex_dbg(adapter, EVENT,
1209                             "info: --- Rx: Event ---\n");
1210                 adapter->event_cause = le32_to_cpu(*(__le32 *) skb->data);
1211 
1212                 if ((skb->len > 0) && (skb->len  < MAX_EVENT_SIZE))
1213                         memcpy(adapter->event_body,
1214                                skb->data + MWIFIEX_EVENT_HEADER_LEN,
1215                                skb->len);
1216 
1217                 /* event cause has been saved to adapter->event_cause */
1218                 adapter->event_received = true;
1219                 adapter->event_skb = skb;
1220 
1221                 break;
1222 
1223         default:
1224                 mwifiex_dbg(adapter, ERROR,
1225                             "unknown upload type %#x\n", upld_typ);
1226                 dev_kfree_skb_any(skb);
1227                 break;
1228         }
1229 
1230         return 0;
1231 }
1232 
1233 /*
1234  * This function transfers received packets from card to driver, performing
1235  * aggregation if required.
1236  *
1237  * For data received on control port, or if aggregation is disabled, the
1238  * received buffers are uploaded as separate packets. However, if aggregation
1239  * is enabled and required, the buffers are copied onto an aggregation buffer,
1240  * provided there is space left, processed and finally uploaded.
1241  */
1242 static int mwifiex_sdio_card_to_host_mp_aggr(struct mwifiex_adapter *adapter,
1243                                              u16 rx_len, u8 port)
1244 {
1245         struct sdio_mmc_card *card = adapter->card;
1246         s32 f_do_rx_aggr = 0;
1247         s32 f_do_rx_cur = 0;
1248         s32 f_aggr_cur = 0;
1249         s32 f_post_aggr_cur = 0;
1250         struct sk_buff *skb_deaggr;
1251         struct sk_buff *skb = NULL;
1252         u32 pkt_len, pkt_type, mport, pind;
1253         u8 *curr_ptr;
1254 
1255         if ((card->has_control_mask) && (port == CTRL_PORT)) {
1256                 /* Read the command Resp without aggr */
1257                 mwifiex_dbg(adapter, CMD,
1258                             "info: %s: no aggregation for cmd\t"
1259                             "response\n", __func__);
1260 
1261                 f_do_rx_cur = 1;
1262                 goto rx_curr_single;
1263         }
1264 
1265         if (!card->mpa_rx.enabled) {
1266                 mwifiex_dbg(adapter, WARN,
1267                             "info: %s: rx aggregation disabled\n",
1268                             __func__);
1269 
1270                 f_do_rx_cur = 1;
1271                 goto rx_curr_single;
1272         }
1273 
1274         if ((!card->has_control_mask && (card->mp_rd_bitmap &
1275                                          card->reg->data_port_mask)) ||
1276             (card->has_control_mask && (card->mp_rd_bitmap &
1277                                         (~((u32) CTRL_PORT_MASK))))) {
1278                 /* Some more data RX pending */
1279                 mwifiex_dbg(adapter, INFO,
1280                             "info: %s: not last packet\n", __func__);
1281 
1282                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1283                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, rx_len)) {
1284                                 f_aggr_cur = 1;
1285                         } else {
1286                                 /* No room in Aggr buf, do rx aggr now */
1287                                 f_do_rx_aggr = 1;
1288                                 f_post_aggr_cur = 1;
1289                         }
1290                 } else {
1291                         /* Rx aggr not in progress */
1292                         f_aggr_cur = 1;
1293                 }
1294 
1295         } else {
1296                 /* No more data RX pending */
1297                 mwifiex_dbg(adapter, INFO,
1298                             "info: %s: last packet\n", __func__);
1299 
1300                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1301                         f_do_rx_aggr = 1;
1302                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, rx_len))
1303                                 f_aggr_cur = 1;
1304                         else
1305                                 /* No room in Aggr buf, do rx aggr now */
1306                                 f_do_rx_cur = 1;
1307                 } else {
1308                         f_do_rx_cur = 1;
1309                 }
1310         }
1311 
1312         if (f_aggr_cur) {
1313                 mwifiex_dbg(adapter, INFO,
1314                             "info: current packet aggregation\n");
1315                 /* Curr pkt can be aggregated */
1316                 mp_rx_aggr_setup(card, rx_len, port);
1317 
1318                 if (MP_RX_AGGR_PKT_LIMIT_REACHED(card) ||
1319                     mp_rx_aggr_port_limit_reached(card)) {
1320                         mwifiex_dbg(adapter, INFO,
1321                                     "info: %s: aggregated packet\t"
1322                                     "limit reached\n", __func__);
1323                         /* No more pkts allowed in Aggr buf, rx it */
1324                         f_do_rx_aggr = 1;
1325                 }
1326         }
1327 
1328         if (f_do_rx_aggr) {
1329                 /* do aggr RX now */
1330                 mwifiex_dbg(adapter, DATA,
1331                             "info: do_rx_aggr: num of packets: %d\n",
1332                             card->mpa_rx.pkt_cnt);
1333 
1334                 if (card->supports_sdio_new_mode) {
1335                         int i;
1336                         u32 port_count;
1337 
1338                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1339                                 if (card->mpa_rx.ports & BIT(i))
1340                                         port_count++;
1341 
1342                         /* Reading data from "start_port + 0" to "start_port +
1343                          * port_count -1", so decrease the count by 1
1344                          */
1345                         port_count--;
1346                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1347                                  (port_count << 8)) + card->mpa_rx.start_port;
1348                 } else {
1349                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1350                                  (card->mpa_rx.ports << 4)) +
1351                                  card->mpa_rx.start_port;
1352                 }
1353 
1354                 if (mwifiex_read_data_sync(adapter, card->mpa_rx.buf,
1355                                            card->mpa_rx.buf_len, mport, 1))
1356                         goto error;
1357 
1358                 curr_ptr = card->mpa_rx.buf;
1359 
1360                 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1361                         u32 *len_arr = card->mpa_rx.len_arr;
1362 
1363                         /* get curr PKT len & type */
1364                         pkt_len = le16_to_cpu(*(__le16 *) &curr_ptr[0]);
1365                         pkt_type = le16_to_cpu(*(__le16 *) &curr_ptr[2]);
1366 
1367                         /* copy pkt to deaggr buf */
1368                         skb_deaggr = mwifiex_alloc_dma_align_buf(len_arr[pind],
1369                                                                  GFP_KERNEL |
1370                                                                  GFP_DMA);
1371                         if (!skb_deaggr) {
1372                                 mwifiex_dbg(adapter, ERROR, "skb allocation failure\t"
1373                                             "drop pkt len=%d type=%d\n",
1374                                             pkt_len, pkt_type);
1375                                 curr_ptr += len_arr[pind];
1376                                 continue;
1377                         }
1378 
1379                         skb_put(skb_deaggr, len_arr[pind]);
1380 
1381                         if ((pkt_type == MWIFIEX_TYPE_DATA ||
1382                              (pkt_type == MWIFIEX_TYPE_AGGR_DATA &&
1383                               adapter->sdio_rx_aggr_enable)) &&
1384                             (pkt_len <= len_arr[pind])) {
1385 
1386                                 memcpy(skb_deaggr->data, curr_ptr, pkt_len);
1387 
1388                                 skb_trim(skb_deaggr, pkt_len);
1389 
1390                                 /* Process de-aggr packet */
1391                                 mwifiex_decode_rx_packet(adapter, skb_deaggr,
1392                                                          pkt_type);
1393                         } else {
1394                                 mwifiex_dbg(adapter, ERROR,
1395                                             "drop wrong aggr pkt:\t"
1396                                             "sdio_single_port_rx_aggr=%d\t"
1397                                             "type=%d len=%d max_len=%d\n",
1398                                             adapter->sdio_rx_aggr_enable,
1399                                             pkt_type, pkt_len, len_arr[pind]);
1400                                 dev_kfree_skb_any(skb_deaggr);
1401                         }
1402                         curr_ptr += len_arr[pind];
1403                 }
1404                 MP_RX_AGGR_BUF_RESET(card);
1405         }
1406 
1407 rx_curr_single:
1408         if (f_do_rx_cur) {
1409                 mwifiex_dbg(adapter, INFO, "info: RX: port: %d, rx_len: %d\n",
1410                             port, rx_len);
1411 
1412                 skb = mwifiex_alloc_dma_align_buf(rx_len, GFP_KERNEL | GFP_DMA);
1413                 if (!skb) {
1414                         mwifiex_dbg(adapter, ERROR,
1415                                     "single skb allocated fail,\t"
1416                                     "drop pkt port=%d len=%d\n", port, rx_len);
1417                         if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
1418                                                       card->mpa_rx.buf, rx_len,
1419                                                       adapter->ioport + port))
1420                                 goto error;
1421                         return 0;
1422                 }
1423 
1424                 skb_put(skb, rx_len);
1425 
1426                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
1427                                               skb->data, skb->len,
1428                                               adapter->ioport + port))
1429                         goto error;
1430                 if (!adapter->sdio_rx_aggr_enable &&
1431                     pkt_type == MWIFIEX_TYPE_AGGR_DATA) {
1432                         mwifiex_dbg(adapter, ERROR, "drop wrong pkt type %d\t"
1433                                     "current SDIO RX Aggr not enabled\n",
1434                                     pkt_type);
1435                         dev_kfree_skb_any(skb);
1436                         return 0;
1437                 }
1438 
1439                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1440         }
1441         if (f_post_aggr_cur) {
1442                 mwifiex_dbg(adapter, INFO,
1443                             "info: current packet aggregation\n");
1444                 /* Curr pkt can be aggregated */
1445                 mp_rx_aggr_setup(card, rx_len, port);
1446         }
1447 
1448         return 0;
1449 error:
1450         if (MP_RX_AGGR_IN_PROGRESS(card))
1451                 MP_RX_AGGR_BUF_RESET(card);
1452 
1453         if (f_do_rx_cur && skb)
1454                 /* Single transfer pending. Free curr buff also */
1455                 dev_kfree_skb_any(skb);
1456 
1457         return -1;
1458 }
1459 
1460 /*
1461  * This function checks the current interrupt status.
1462  *
1463  * The following interrupts are checked and handled by this function -
1464  *      - Data sent
1465  *      - Command sent
1466  *      - Packets received
1467  *
1468  * Since the firmware does not generate download ready interrupt if the
1469  * port updated is command port only, command sent interrupt checking
1470  * should be done manually, and for every SDIO interrupt.
1471  *
1472  * In case of Rx packets received, the packets are uploaded from card to
1473  * host and processed accordingly.
1474  */
1475 static int mwifiex_process_int_status(struct mwifiex_adapter *adapter)
1476 {
1477         struct sdio_mmc_card *card = adapter->card;
1478         const struct mwifiex_sdio_card_reg *reg = card->reg;
1479         int ret = 0;
1480         u8 sdio_ireg;
1481         struct sk_buff *skb;
1482         u8 port = CTRL_PORT;
1483         u32 len_reg_l, len_reg_u;
1484         u32 rx_blocks;
1485         u16 rx_len;
1486         unsigned long flags;
1487         u32 bitmap;
1488         u8 cr;
1489 
1490         spin_lock_irqsave(&adapter->int_lock, flags);
1491         sdio_ireg = adapter->int_status;
1492         adapter->int_status = 0;
1493         spin_unlock_irqrestore(&adapter->int_lock, flags);
1494 
1495         if (!sdio_ireg)
1496                 return ret;
1497 
1498         /* Following interrupt is only for SDIO new mode */
1499         if (sdio_ireg & DN_LD_CMD_PORT_HOST_INT_STATUS && adapter->cmd_sent)
1500                 adapter->cmd_sent = false;
1501 
1502         /* Following interrupt is only for SDIO new mode */
1503         if (sdio_ireg & UP_LD_CMD_PORT_HOST_INT_STATUS) {
1504                 u32 pkt_type;
1505 
1506                 /* read the len of control packet */
1507                 rx_len = card->mp_regs[reg->cmd_rd_len_1] << 8;
1508                 rx_len |= (u16)card->mp_regs[reg->cmd_rd_len_0];
1509                 rx_blocks = DIV_ROUND_UP(rx_len, MWIFIEX_SDIO_BLOCK_SIZE);
1510                 if (rx_len <= INTF_HEADER_LEN ||
1511                     (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1512                      MWIFIEX_RX_DATA_BUF_SIZE)
1513                         return -1;
1514                 rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1515                 mwifiex_dbg(adapter, INFO, "info: rx_len = %d\n", rx_len);
1516 
1517                 skb = mwifiex_alloc_dma_align_buf(rx_len, GFP_KERNEL | GFP_DMA);
1518                 if (!skb)
1519                         return -1;
1520 
1521                 skb_put(skb, rx_len);
1522 
1523                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type, skb->data,
1524                                               skb->len, adapter->ioport |
1525                                                         CMD_PORT_SLCT)) {
1526                         mwifiex_dbg(adapter, ERROR,
1527                                     "%s: failed to card_to_host", __func__);
1528                         dev_kfree_skb_any(skb);
1529                         goto term_cmd;
1530                 }
1531 
1532                 if ((pkt_type != MWIFIEX_TYPE_CMD) &&
1533                     (pkt_type != MWIFIEX_TYPE_EVENT))
1534                         mwifiex_dbg(adapter, ERROR,
1535                                     "%s:Received wrong packet on cmd port",
1536                                     __func__);
1537 
1538                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1539         }
1540 
1541         if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
1542                 bitmap = (u32) card->mp_regs[reg->wr_bitmap_l];
1543                 bitmap |= ((u32) card->mp_regs[reg->wr_bitmap_u]) << 8;
1544                 if (card->supports_sdio_new_mode) {
1545                         bitmap |=
1546                                 ((u32) card->mp_regs[reg->wr_bitmap_1l]) << 16;
1547                         bitmap |=
1548                                 ((u32) card->mp_regs[reg->wr_bitmap_1u]) << 24;
1549                 }
1550                 card->mp_wr_bitmap = bitmap;
1551 
1552                 mwifiex_dbg(adapter, INTR,
1553                             "int: DNLD: wr_bitmap=0x%x\n",
1554                             card->mp_wr_bitmap);
1555                 if (adapter->data_sent &&
1556                     (card->mp_wr_bitmap & card->mp_data_port_mask)) {
1557                         mwifiex_dbg(adapter, INTR,
1558                                     "info:  <--- Tx DONE Interrupt --->\n");
1559                         adapter->data_sent = false;
1560                 }
1561         }
1562 
1563         /* As firmware will not generate download ready interrupt if the port
1564            updated is command port only, cmd_sent should be done for any SDIO
1565            interrupt. */
1566         if (card->has_control_mask && adapter->cmd_sent) {
1567                 /* Check if firmware has attach buffer at command port and
1568                    update just that in wr_bit_map. */
1569                 card->mp_wr_bitmap |=
1570                         (u32) card->mp_regs[reg->wr_bitmap_l] & CTRL_PORT_MASK;
1571                 if (card->mp_wr_bitmap & CTRL_PORT_MASK)
1572                         adapter->cmd_sent = false;
1573         }
1574 
1575         mwifiex_dbg(adapter, INTR, "info: cmd_sent=%d data_sent=%d\n",
1576                     adapter->cmd_sent, adapter->data_sent);
1577         if (sdio_ireg & UP_LD_HOST_INT_STATUS) {
1578                 bitmap = (u32) card->mp_regs[reg->rd_bitmap_l];
1579                 bitmap |= ((u32) card->mp_regs[reg->rd_bitmap_u]) << 8;
1580                 if (card->supports_sdio_new_mode) {
1581                         bitmap |=
1582                                 ((u32) card->mp_regs[reg->rd_bitmap_1l]) << 16;
1583                         bitmap |=
1584                                 ((u32) card->mp_regs[reg->rd_bitmap_1u]) << 24;
1585                 }
1586                 card->mp_rd_bitmap = bitmap;
1587                 mwifiex_dbg(adapter, INTR,
1588                             "int: UPLD: rd_bitmap=0x%x\n",
1589                             card->mp_rd_bitmap);
1590 
1591                 while (true) {
1592                         ret = mwifiex_get_rd_port(adapter, &port);
1593                         if (ret) {
1594                                 mwifiex_dbg(adapter, INFO,
1595                                             "info: no more rd_port available\n");
1596                                 break;
1597                         }
1598                         len_reg_l = reg->rd_len_p0_l + (port << 1);
1599                         len_reg_u = reg->rd_len_p0_u + (port << 1);
1600                         rx_len = ((u16) card->mp_regs[len_reg_u]) << 8;
1601                         rx_len |= (u16) card->mp_regs[len_reg_l];
1602                         mwifiex_dbg(adapter, INFO,
1603                                     "info: RX: port=%d rx_len=%u\n",
1604                                     port, rx_len);
1605                         rx_blocks =
1606                                 (rx_len + MWIFIEX_SDIO_BLOCK_SIZE -
1607                                  1) / MWIFIEX_SDIO_BLOCK_SIZE;
1608                         if (rx_len <= INTF_HEADER_LEN ||
1609                             (card->mpa_rx.enabled &&
1610                              ((rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1611                               card->mpa_rx.buf_size))) {
1612                                 mwifiex_dbg(adapter, ERROR,
1613                                             "invalid rx_len=%d\n",
1614                                             rx_len);
1615                                 return -1;
1616                         }
1617 
1618                         rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1619                         mwifiex_dbg(adapter, INFO, "info: rx_len = %d\n",
1620                                     rx_len);
1621 
1622                         if (mwifiex_sdio_card_to_host_mp_aggr(adapter, rx_len,
1623                                                               port)) {
1624                                 mwifiex_dbg(adapter, ERROR,
1625                                             "card_to_host_mpa failed: int status=%#x\n",
1626                                             sdio_ireg);
1627                                 goto term_cmd;
1628                         }
1629                 }
1630         }
1631 
1632         return 0;
1633 
1634 term_cmd:
1635         /* terminate cmd */
1636         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1637                 mwifiex_dbg(adapter, ERROR, "read CFG reg failed\n");
1638         else
1639                 mwifiex_dbg(adapter, INFO,
1640                             "info: CFG reg val = %d\n", cr);
1641 
1642         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, (cr | 0x04)))
1643                 mwifiex_dbg(adapter, ERROR,
1644                             "write CFG reg failed\n");
1645         else
1646                 mwifiex_dbg(adapter, INFO, "info: write success\n");
1647 
1648         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1649                 mwifiex_dbg(adapter, ERROR,
1650                             "read CFG reg failed\n");
1651         else
1652                 mwifiex_dbg(adapter, INFO,
1653                             "info: CFG reg val =%x\n", cr);
1654 
1655         return -1;
1656 }
1657 
1658 /*
1659  * This function aggregates transmission buffers in driver and downloads
1660  * the aggregated packet to card.
1661  *
1662  * The individual packets are aggregated by copying into an aggregation
1663  * buffer and then downloaded to the card. Previous unsent packets in the
1664  * aggregation buffer are pre-copied first before new packets are added.
1665  * Aggregation is done till there is space left in the aggregation buffer,
1666  * or till new packets are available.
1667  *
1668  * The function will only download the packet to the card when aggregation
1669  * stops, otherwise it will just aggregate the packet in aggregation buffer
1670  * and return.
1671  */
1672 static int mwifiex_host_to_card_mp_aggr(struct mwifiex_adapter *adapter,
1673                                         u8 *payload, u32 pkt_len, u32 port,
1674                                         u32 next_pkt_len)
1675 {
1676         struct sdio_mmc_card *card = adapter->card;
1677         int ret = 0;
1678         s32 f_send_aggr_buf = 0;
1679         s32 f_send_cur_buf = 0;
1680         s32 f_precopy_cur_buf = 0;
1681         s32 f_postcopy_cur_buf = 0;
1682         u32 mport;
1683 
1684         if (!card->mpa_tx.enabled ||
1685             (card->has_control_mask && (port == CTRL_PORT)) ||
1686             (card->supports_sdio_new_mode && (port == CMD_PORT_SLCT))) {
1687                 mwifiex_dbg(adapter, WARN,
1688                             "info: %s: tx aggregation disabled\n",
1689                             __func__);
1690 
1691                 f_send_cur_buf = 1;
1692                 goto tx_curr_single;
1693         }
1694 
1695         if (next_pkt_len) {
1696                 /* More pkt in TX queue */
1697                 mwifiex_dbg(adapter, INFO,
1698                             "info: %s: more packets in queue.\n",
1699                             __func__);
1700 
1701                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1702                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len)) {
1703                                 f_precopy_cur_buf = 1;
1704 
1705                                 if (!(card->mp_wr_bitmap &
1706                                       (1 << card->curr_wr_port)) ||
1707                                     !MP_TX_AGGR_BUF_HAS_ROOM(
1708                                             card, pkt_len + next_pkt_len))
1709                                         f_send_aggr_buf = 1;
1710                         } else {
1711                                 /* No room in Aggr buf, send it */
1712                                 f_send_aggr_buf = 1;
1713 
1714                                 if (!(card->mp_wr_bitmap &
1715                                       (1 << card->curr_wr_port)))
1716                                         f_send_cur_buf = 1;
1717                                 else
1718                                         f_postcopy_cur_buf = 1;
1719                         }
1720                 } else {
1721                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len) &&
1722                             (card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1723                                 f_precopy_cur_buf = 1;
1724                         else
1725                                 f_send_cur_buf = 1;
1726                 }
1727         } else {
1728                 /* Last pkt in TX queue */
1729                 mwifiex_dbg(adapter, INFO,
1730                             "info: %s: Last packet in Tx Queue.\n",
1731                             __func__);
1732 
1733                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1734                         /* some packs in Aggr buf already */
1735                         f_send_aggr_buf = 1;
1736 
1737                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len))
1738                                 f_precopy_cur_buf = 1;
1739                         else
1740                                 /* No room in Aggr buf, send it */
1741                                 f_send_cur_buf = 1;
1742                 } else {
1743                         f_send_cur_buf = 1;
1744                 }
1745         }
1746 
1747         if (f_precopy_cur_buf) {
1748                 mwifiex_dbg(adapter, DATA,
1749                             "data: %s: precopy current buffer\n",
1750                             __func__);
1751                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1752 
1753                 if (MP_TX_AGGR_PKT_LIMIT_REACHED(card) ||
1754                     mp_tx_aggr_port_limit_reached(card))
1755                         /* No more pkts allowed in Aggr buf, send it */
1756                         f_send_aggr_buf = 1;
1757         }
1758 
1759         if (f_send_aggr_buf) {
1760                 mwifiex_dbg(adapter, DATA,
1761                             "data: %s: send aggr buffer: %d %d\n",
1762                             __func__, card->mpa_tx.start_port,
1763                             card->mpa_tx.ports);
1764                 if (card->supports_sdio_new_mode) {
1765                         u32 port_count;
1766                         int i;
1767 
1768                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1769                                 if (card->mpa_tx.ports & BIT(i))
1770                                         port_count++;
1771 
1772                         /* Writing data from "start_port + 0" to "start_port +
1773                          * port_count -1", so decrease the count by 1
1774                          */
1775                         port_count--;
1776                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1777                                  (port_count << 8)) + card->mpa_tx.start_port;
1778                 } else {
1779                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1780                                  (card->mpa_tx.ports << 4)) +
1781                                  card->mpa_tx.start_port;
1782                 }
1783 
1784                 ret = mwifiex_write_data_to_card(adapter, card->mpa_tx.buf,
1785                                                  card->mpa_tx.buf_len, mport);
1786 
1787                 MP_TX_AGGR_BUF_RESET(card);
1788         }
1789 
1790 tx_curr_single:
1791         if (f_send_cur_buf) {
1792                 mwifiex_dbg(adapter, DATA,
1793                             "data: %s: send current buffer %d\n",
1794                             __func__, port);
1795                 ret = mwifiex_write_data_to_card(adapter, payload, pkt_len,
1796                                                  adapter->ioport + port);
1797         }
1798 
1799         if (f_postcopy_cur_buf) {
1800                 mwifiex_dbg(adapter, DATA,
1801                             "data: %s: postcopy current buffer\n",
1802                             __func__);
1803                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1804         }
1805 
1806         return ret;
1807 }
1808 
1809 /*
1810  * This function downloads data from driver to card.
1811  *
1812  * Both commands and data packets are transferred to the card by this
1813  * function.
1814  *
1815  * This function adds the SDIO specific header to the front of the buffer
1816  * before transferring. The header contains the length of the packet and
1817  * the type. The firmware handles the packets based upon this set type.
1818  */
1819 static int mwifiex_sdio_host_to_card(struct mwifiex_adapter *adapter,
1820                                      u8 type, struct sk_buff *skb,
1821                                      struct mwifiex_tx_param *tx_param)
1822 {
1823         struct sdio_mmc_card *card = adapter->card;
1824         int ret;
1825         u32 buf_block_len;
1826         u32 blk_size;
1827         u32 port = CTRL_PORT;
1828         u8 *payload = (u8 *)skb->data;
1829         u32 pkt_len = skb->len;
1830 
1831         /* Allocate buffer and copy payload */
1832         blk_size = MWIFIEX_SDIO_BLOCK_SIZE;
1833         buf_block_len = (pkt_len + blk_size - 1) / blk_size;
1834         *(__le16 *)&payload[0] = cpu_to_le16((u16)pkt_len);
1835         *(__le16 *)&payload[2] = cpu_to_le16(type);
1836 
1837         /*
1838          * This is SDIO specific header
1839          *  u16 length,
1840          *  u16 type (MWIFIEX_TYPE_DATA = 0, MWIFIEX_TYPE_CMD = 1,
1841          *  MWIFIEX_TYPE_EVENT = 3)
1842          */
1843         if (type == MWIFIEX_TYPE_DATA) {
1844                 ret = mwifiex_get_wr_port_data(adapter, &port);
1845                 if (ret) {
1846                         mwifiex_dbg(adapter, ERROR,
1847                                     "%s: no wr_port available\n",
1848                                     __func__);
1849                         return ret;
1850                 }
1851         } else {
1852                 adapter->cmd_sent = true;
1853                 /* Type must be MWIFIEX_TYPE_CMD */
1854 
1855                 if (pkt_len <= INTF_HEADER_LEN ||
1856                     pkt_len > MWIFIEX_UPLD_SIZE)
1857                         mwifiex_dbg(adapter, ERROR,
1858                                     "%s: payload=%p, nb=%d\n",
1859                                     __func__, payload, pkt_len);
1860 
1861                 if (card->supports_sdio_new_mode)
1862                         port = CMD_PORT_SLCT;
1863         }
1864 
1865         /* Transfer data to card */
1866         pkt_len = buf_block_len * blk_size;
1867 
1868         if (tx_param)
1869                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1870                                                    port, tx_param->next_pkt_len
1871                                                    );
1872         else
1873                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1874                                                    port, 0);
1875 
1876         if (ret) {
1877                 if (type == MWIFIEX_TYPE_CMD)
1878                         adapter->cmd_sent = false;
1879                 if (type == MWIFIEX_TYPE_DATA) {
1880                         adapter->data_sent = false;
1881                         /* restore curr_wr_port in error cases */
1882                         card->curr_wr_port = port;
1883                         card->mp_wr_bitmap |= (u32)(1 << card->curr_wr_port);
1884                 }
1885         } else {
1886                 if (type == MWIFIEX_TYPE_DATA) {
1887                         if (!(card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1888                                 adapter->data_sent = true;
1889                         else
1890                                 adapter->data_sent = false;
1891                 }
1892         }
1893 
1894         return ret;
1895 }
1896 
1897 /*
1898  * This function allocates the MPA Tx and Rx buffers.
1899  */
1900 static int mwifiex_alloc_sdio_mpa_buffers(struct mwifiex_adapter *adapter,
1901                                    u32 mpa_tx_buf_size, u32 mpa_rx_buf_size)
1902 {
1903         struct sdio_mmc_card *card = adapter->card;
1904         u32 rx_buf_size;
1905         int ret = 0;
1906 
1907         card->mpa_tx.buf = kzalloc(mpa_tx_buf_size, GFP_KERNEL);
1908         if (!card->mpa_tx.buf) {
1909                 ret = -1;
1910                 goto error;
1911         }
1912 
1913         card->mpa_tx.buf_size = mpa_tx_buf_size;
1914 
1915         rx_buf_size = max_t(u32, mpa_rx_buf_size,
1916                             (u32)SDIO_MAX_AGGR_BUF_SIZE);
1917         card->mpa_rx.buf = kzalloc(rx_buf_size, GFP_KERNEL);
1918         if (!card->mpa_rx.buf) {
1919                 ret = -1;
1920                 goto error;
1921         }
1922 
1923         card->mpa_rx.buf_size = rx_buf_size;
1924 
1925 error:
1926         if (ret) {
1927                 kfree(card->mpa_tx.buf);
1928                 kfree(card->mpa_rx.buf);
1929                 card->mpa_tx.buf_size = 0;
1930                 card->mpa_rx.buf_size = 0;
1931         }
1932 
1933         return ret;
1934 }
1935 
1936 /*
1937  * This function unregisters the SDIO device.
1938  *
1939  * The SDIO IRQ is released, the function is disabled and driver
1940  * data is set to null.
1941  */
1942 static void
1943 mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
1944 {
1945         struct sdio_mmc_card *card = adapter->card;
1946 
1947         if (adapter->card) {
1948                 sdio_claim_host(card->func);
1949                 sdio_disable_func(card->func);
1950                 sdio_release_host(card->func);
1951         }
1952 }
1953 
1954 /*
1955  * This function registers the SDIO device.
1956  *
1957  * SDIO IRQ is claimed, block size is set and driver data is initialized.
1958  */
1959 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
1960 {
1961         int ret;
1962         struct sdio_mmc_card *card = adapter->card;
1963         struct sdio_func *func = card->func;
1964 
1965         /* save adapter pointer in card */
1966         card->adapter = adapter;
1967         adapter->tx_buf_size = card->tx_buf_size;
1968 
1969         sdio_claim_host(func);
1970 
1971         /* Set block size */
1972         ret = sdio_set_block_size(card->func, MWIFIEX_SDIO_BLOCK_SIZE);
1973         sdio_release_host(func);
1974         if (ret) {
1975                 mwifiex_dbg(adapter, ERROR,
1976                             "cannot set SDIO block size\n");
1977                 return ret;
1978         }
1979 
1980 
1981         adapter->dev = &func->dev;
1982 
1983         strcpy(adapter->fw_name, card->firmware);
1984         if (card->fw_dump_enh) {
1985                 adapter->mem_type_mapping_tbl = generic_mem_type_map;
1986                 adapter->num_mem_types = 1;
1987         } else {
1988                 adapter->mem_type_mapping_tbl = mem_type_mapping_tbl;
1989                 adapter->num_mem_types = ARRAY_SIZE(mem_type_mapping_tbl);
1990         }
1991 
1992         return 0;
1993 }
1994 
1995 /*
1996  * This function initializes the SDIO driver.
1997  *
1998  * The following initializations steps are followed -
1999  *      - Read the Host interrupt status register to acknowledge
2000  *        the first interrupt got from bootloader
2001  *      - Disable host interrupt mask register
2002  *      - Get SDIO port
2003  *      - Initialize SDIO variables in card
2004  *      - Allocate MP registers
2005  *      - Allocate MPA Tx and Rx buffers
2006  */
2007 static int mwifiex_init_sdio(struct mwifiex_adapter *adapter)
2008 {
2009         struct sdio_mmc_card *card = adapter->card;
2010         const struct mwifiex_sdio_card_reg *reg = card->reg;
2011         int ret;
2012         u8 sdio_ireg;
2013 
2014         sdio_set_drvdata(card->func, card);
2015 
2016         /*
2017          * Read the host_int_status_reg for ACK the first interrupt got
2018          * from the bootloader. If we don't do this we get a interrupt
2019          * as soon as we register the irq.
2020          */
2021         mwifiex_read_reg(adapter, card->reg->host_int_status_reg, &sdio_ireg);
2022 
2023         /* Get SDIO ioport */
2024         mwifiex_init_sdio_ioport(adapter);
2025 
2026         /* Initialize SDIO variables in card */
2027         card->mp_rd_bitmap = 0;
2028         card->mp_wr_bitmap = 0;
2029         card->curr_rd_port = reg->start_rd_port;
2030         card->curr_wr_port = reg->start_wr_port;
2031 
2032         card->mp_data_port_mask = reg->data_port_mask;
2033 
2034         card->mpa_tx.buf_len = 0;
2035         card->mpa_tx.pkt_cnt = 0;
2036         card->mpa_tx.start_port = 0;
2037 
2038         card->mpa_tx.enabled = 1;
2039         card->mpa_tx.pkt_aggr_limit = card->mp_agg_pkt_limit;
2040 
2041         card->mpa_rx.buf_len = 0;
2042         card->mpa_rx.pkt_cnt = 0;
2043         card->mpa_rx.start_port = 0;
2044 
2045         card->mpa_rx.enabled = 1;
2046         card->mpa_rx.pkt_aggr_limit = card->mp_agg_pkt_limit;
2047 
2048         /* Allocate buffers for SDIO MP-A */
2049         card->mp_regs = kzalloc(reg->max_mp_regs, GFP_KERNEL);
2050         if (!card->mp_regs)
2051                 return -ENOMEM;
2052 
2053         /* Allocate skb pointer buffers */
2054         card->mpa_rx.skb_arr = kzalloc((sizeof(void *)) *
2055                                        card->mp_agg_pkt_limit, GFP_KERNEL);
2056         card->mpa_rx.len_arr = kzalloc(sizeof(*card->mpa_rx.len_arr) *
2057                                        card->mp_agg_pkt_limit, GFP_KERNEL);
2058         ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
2059                                              card->mp_tx_agg_buf_size,
2060                                              card->mp_rx_agg_buf_size);
2061 
2062         /* Allocate 32k MPA Tx/Rx buffers if 64k memory allocation fails */
2063         if (ret && (card->mp_tx_agg_buf_size == MWIFIEX_MP_AGGR_BUF_SIZE_MAX ||
2064                     card->mp_rx_agg_buf_size == MWIFIEX_MP_AGGR_BUF_SIZE_MAX)) {
2065                 /* Disable rx single port aggregation */
2066                 adapter->host_disable_sdio_rx_aggr = true;
2067 
2068                 ret = mwifiex_alloc_sdio_mpa_buffers
2069                         (adapter, MWIFIEX_MP_AGGR_BUF_SIZE_32K,
2070                          MWIFIEX_MP_AGGR_BUF_SIZE_32K);
2071                 if (ret) {
2072                         /* Disable multi port aggregation */
2073                         card->mpa_tx.enabled = 0;
2074                         card->mpa_rx.enabled = 0;
2075                 }
2076         }
2077 
2078         adapter->auto_tdls = card->can_auto_tdls;
2079         adapter->ext_scan = card->can_ext_scan;
2080         return 0;
2081 }
2082 
2083 /*
2084  * This function resets the MPA Tx and Rx buffers.
2085  */
2086 static void mwifiex_cleanup_mpa_buf(struct mwifiex_adapter *adapter)
2087 {
2088         struct sdio_mmc_card *card = adapter->card;
2089 
2090         MP_TX_AGGR_BUF_RESET(card);
2091         MP_RX_AGGR_BUF_RESET(card);
2092 }
2093 
2094 /*
2095  * This function cleans up the allocated card buffers.
2096  *
2097  * The following are freed by this function -
2098  *      - MP registers
2099  *      - MPA Tx buffer
2100  *      - MPA Rx buffer
2101  */
2102 static void mwifiex_cleanup_sdio(struct mwifiex_adapter *adapter)
2103 {
2104         struct sdio_mmc_card *card = adapter->card;
2105 
2106         kfree(card->mp_regs);
2107         kfree(card->mpa_rx.skb_arr);
2108         kfree(card->mpa_rx.len_arr);
2109         kfree(card->mpa_tx.buf);
2110         kfree(card->mpa_rx.buf);
2111         sdio_set_drvdata(card->func, NULL);
2112         kfree(card);
2113 }
2114 
2115 /*
2116  * This function updates the MP end port in card.
2117  */
2118 static void
2119 mwifiex_update_mp_end_port(struct mwifiex_adapter *adapter, u16 port)
2120 {
2121         struct sdio_mmc_card *card = adapter->card;
2122         const struct mwifiex_sdio_card_reg *reg = card->reg;
2123         int i;
2124 
2125         card->mp_end_port = port;
2126 
2127         card->mp_data_port_mask = reg->data_port_mask;
2128 
2129         if (reg->start_wr_port) {
2130                 for (i = 1; i <= card->max_ports - card->mp_end_port; i++)
2131                         card->mp_data_port_mask &=
2132                                         ~(1 << (card->max_ports - i));
2133         }
2134 
2135         card->curr_wr_port = reg->start_wr_port;
2136 
2137         mwifiex_dbg(adapter, CMD,
2138                     "cmd: mp_end_port %d, data port mask 0x%x\n",
2139                     port, card->mp_data_port_mask);
2140 }
2141 
2142 static void mwifiex_recreate_adapter(struct sdio_mmc_card *card)
2143 {
2144         struct sdio_func *func = card->func;
2145         const struct sdio_device_id *device_id = card->device_id;
2146 
2147         /* TODO mmc_hw_reset does not require destroying and re-probing the
2148          * whole adapter. Hence there was no need to for this rube-goldberg
2149          * design to reload the fw from an external workqueue. If we don't
2150          * destroy the adapter we could reload the fw from
2151          * mwifiex_main_work_queue directly.
2152          * The real difficulty with fw reset is to restore all the user
2153          * settings applied through ioctl. By destroying and recreating the
2154          * adapter, we take the easy way out, since we rely on user space to
2155          * restore them. We assume that user space will treat the new
2156          * incarnation of the adapter(interfaces) as if they had been just
2157          * discovered and initializes them from scratch.
2158          */
2159 
2160         mwifiex_sdio_remove(func);
2161 
2162         /* power cycle the adapter */
2163         sdio_claim_host(func);
2164         mmc_hw_reset(func->card->host);
2165         sdio_release_host(func);
2166 
2167         mwifiex_sdio_probe(func, device_id);
2168 }
2169 
2170 static struct mwifiex_adapter *save_adapter;
2171 static void mwifiex_sdio_card_reset_work(struct mwifiex_adapter *adapter)
2172 {
2173         struct sdio_mmc_card *card = adapter->card;
2174 
2175         /* TODO card pointer is unprotected. If the adapter is removed
2176          * physically, sdio core might trigger mwifiex_sdio_remove, before this
2177          * workqueue is run, which will destroy the adapter struct. When this
2178          * workqueue eventually exceutes it will dereference an invalid adapter
2179          * pointer
2180          */
2181         mwifiex_recreate_adapter(card);
2182 }
2183 
2184 /* This function read/write firmware */
2185 static enum
2186 rdwr_status mwifiex_sdio_rdwr_firmware(struct mwifiex_adapter *adapter,
2187                                        u8 doneflag)
2188 {
2189         struct sdio_mmc_card *card = adapter->card;
2190         int ret, tries;
2191         u8 ctrl_data = 0;
2192 
2193         sdio_writeb(card->func, card->reg->fw_dump_host_ready,
2194                     card->reg->fw_dump_ctrl, &ret);
2195         if (ret) {
2196                 mwifiex_dbg(adapter, ERROR, "SDIO Write ERR\n");
2197                 return RDWR_STATUS_FAILURE;
2198         }
2199         for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
2200                 ctrl_data = sdio_readb(card->func, card->reg->fw_dump_ctrl,
2201                                        &ret);
2202                 if (ret) {
2203                         mwifiex_dbg(adapter, ERROR, "SDIO read err\n");
2204                         return RDWR_STATUS_FAILURE;
2205                 }
2206                 if (ctrl_data == FW_DUMP_DONE)
2207                         break;
2208                 if (doneflag && ctrl_data == doneflag)
2209                         return RDWR_STATUS_DONE;
2210                 if (ctrl_data != card->reg->fw_dump_host_ready) {
2211                         mwifiex_dbg(adapter, WARN,
2212                                     "The ctrl reg was changed, re-try again\n");
2213                         sdio_writeb(card->func, card->reg->fw_dump_host_ready,
2214                                     card->reg->fw_dump_ctrl, &ret);
2215                         if (ret) {
2216                                 mwifiex_dbg(adapter, ERROR, "SDIO write err\n");
2217                                 return RDWR_STATUS_FAILURE;
2218                         }
2219                 }
2220                 usleep_range(100, 200);
2221         }
2222         if (ctrl_data == card->reg->fw_dump_host_ready) {
2223                 mwifiex_dbg(adapter, ERROR,
2224                             "Fail to pull ctrl_data\n");
2225                 return RDWR_STATUS_FAILURE;
2226         }
2227 
2228         return RDWR_STATUS_SUCCESS;
2229 }
2230 
2231 /* This function dump firmware memory to file */
2232 static void mwifiex_sdio_fw_dump(struct mwifiex_adapter *adapter)
2233 {
2234         struct sdio_mmc_card *card = adapter->card;
2235         int ret = 0;
2236         unsigned int reg, reg_start, reg_end;
2237         u8 *dbg_ptr, *end_ptr, dump_num, idx, i, read_reg, doneflag = 0;
2238         enum rdwr_status stat;
2239         u32 memory_size;
2240 
2241         if (!card->can_dump_fw)
2242                 return;
2243 
2244         for (idx = 0; idx < ARRAY_SIZE(mem_type_mapping_tbl); idx++) {
2245                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
2246 
2247                 if (entry->mem_ptr) {
2248                         vfree(entry->mem_ptr);
2249                         entry->mem_ptr = NULL;
2250                 }
2251                 entry->mem_size = 0;
2252         }
2253 
2254         mwifiex_pm_wakeup_card(adapter);
2255         sdio_claim_host(card->func);
2256 
2257         mwifiex_dbg(adapter, MSG, "== mwifiex firmware dump start ==\n");
2258 
2259         stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2260         if (stat == RDWR_STATUS_FAILURE)
2261                 goto done;
2262 
2263         reg = card->reg->fw_dump_start;
2264         /* Read the number of the memories which will dump */
2265         dump_num = sdio_readb(card->func, reg, &ret);
2266         if (ret) {
2267                 mwifiex_dbg(adapter, ERROR, "SDIO read memory length err\n");
2268                 goto done;
2269         }
2270 
2271         /* Read the length of every memory which will dump */
2272         for (idx = 0; idx < dump_num; idx++) {
2273                 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
2274 
2275                 stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2276                 if (stat == RDWR_STATUS_FAILURE)
2277                         goto done;
2278 
2279                 memory_size = 0;
2280                 reg = card->reg->fw_dump_start;
2281                 for (i = 0; i < 4; i++) {
2282                         read_reg = sdio_readb(card->func, reg, &ret);
2283                         if (ret) {
2284                                 mwifiex_dbg(adapter, ERROR, "SDIO read err\n");
2285                                 goto done;
2286                         }
2287                         memory_size |= (read_reg << i*8);
2288                         reg++;
2289                 }
2290 
2291                 if (memory_size == 0) {
2292                         mwifiex_dbg(adapter, DUMP, "Firmware dump Finished!\n");
2293                         ret = mwifiex_write_reg(adapter,
2294                                                 card->reg->fw_dump_ctrl,
2295                                                 FW_DUMP_READ_DONE);
2296                         if (ret) {
2297                                 mwifiex_dbg(adapter, ERROR, "SDIO write err\n");
2298                                 return;
2299                         }
2300                         break;
2301                 }
2302 
2303                 mwifiex_dbg(adapter, DUMP,
2304                             "%s_SIZE=0x%x\n", entry->mem_name, memory_size);
2305                 entry->mem_ptr = vmalloc(memory_size + 1);
2306                 entry->mem_size = memory_size;
2307                 if (!entry->mem_ptr) {
2308                         mwifiex_dbg(adapter, ERROR, "Vmalloc %s failed\n",
2309                                     entry->mem_name);
2310                         goto done;
2311                 }
2312                 dbg_ptr = entry->mem_ptr;
2313                 end_ptr = dbg_ptr + memory_size;
2314 
2315                 doneflag = entry->done_flag;
2316                 mwifiex_dbg(adapter, DUMP,
2317                             "Start %s output, please wait...\n",
2318                             entry->mem_name);
2319 
2320                 do {
2321                         stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2322                         if (stat == RDWR_STATUS_FAILURE)
2323                                 goto done;
2324 
2325                         reg_start = card->reg->fw_dump_start;
2326                         reg_end = card->reg->fw_dump_end;
2327                         for (reg = reg_start; reg <= reg_end; reg++) {
2328                                 *dbg_ptr = sdio_readb(card->func, reg, &ret);
2329                                 if (ret) {
2330                                         mwifiex_dbg(adapter, ERROR,
2331                                                     "SDIO read err\n");
2332                                         goto done;
2333                                 }
2334                                 if (dbg_ptr < end_ptr)
2335                                         dbg_ptr++;
2336                                 else
2337                                         mwifiex_dbg(adapter, ERROR,
2338                                                     "Allocated buf not enough\n");
2339                         }
2340 
2341                         if (stat != RDWR_STATUS_DONE)
2342                                 continue;
2343 
2344                         mwifiex_dbg(adapter, DUMP, "%s done: size=0x%tx\n",
2345                                     entry->mem_name, dbg_ptr - entry->mem_ptr);
2346                         break;
2347                 } while (1);
2348         }
2349         mwifiex_dbg(adapter, MSG, "== mwifiex firmware dump end ==\n");
2350 
2351 done:
2352         sdio_release_host(card->func);
2353 }
2354 
2355 static void mwifiex_sdio_generic_fw_dump(struct mwifiex_adapter *adapter)
2356 {
2357         struct sdio_mmc_card *card = adapter->card;
2358         struct memory_type_mapping *entry = &generic_mem_type_map[0];
2359         unsigned int reg, reg_start, reg_end;
2360         u8 start_flag = 0, done_flag = 0;
2361         u8 *dbg_ptr, *end_ptr;
2362         enum rdwr_status stat;
2363         int ret = -1, tries;
2364 
2365         if (!card->fw_dump_enh)
2366                 return;
2367 
2368         if (entry->mem_ptr) {
2369                 vfree(entry->mem_ptr);
2370                 entry->mem_ptr = NULL;
2371         }
2372         entry->mem_size = 0;
2373 
2374         mwifiex_pm_wakeup_card(adapter);
2375         sdio_claim_host(card->func);
2376 
2377         mwifiex_dbg(adapter, MSG, "== mwifiex firmware dump start ==\n");
2378 
2379         stat = mwifiex_sdio_rdwr_firmware(adapter, done_flag);
2380         if (stat == RDWR_STATUS_FAILURE)
2381                 goto done;
2382 
2383         reg_start = card->reg->fw_dump_start;
2384         reg_end = card->reg->fw_dump_end;
2385         for (reg = reg_start; reg <= reg_end; reg++) {
2386                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
2387                         start_flag = sdio_readb(card->func, reg, &ret);
2388                         if (ret) {
2389                                 mwifiex_dbg(adapter, ERROR,
2390                                             "SDIO read err\n");
2391                                 goto done;
2392                         }
2393                         if (start_flag == 0)
2394                                 break;
2395                         if (tries == MAX_POLL_TRIES) {
2396                                 mwifiex_dbg(adapter, ERROR,
2397                                             "FW not ready to dump\n");
2398                                 ret = -1;
2399                                 goto done;
2400                         }
2401                 }
2402                 usleep_range(100, 200);
2403         }
2404 
2405         entry->mem_ptr = vmalloc(0xf0000 + 1);
2406         if (!entry->mem_ptr) {
2407                 ret = -1;
2408                 goto done;
2409         }
2410         dbg_ptr = entry->mem_ptr;
2411         entry->mem_size = 0xf0000;
2412         end_ptr = dbg_ptr + entry->mem_size;
2413 
2414         done_flag = entry->done_flag;
2415         mwifiex_dbg(adapter, DUMP,
2416                     "Start %s output, please wait...\n", entry->mem_name);
2417 
2418         while (true) {
2419                 stat = mwifiex_sdio_rdwr_firmware(adapter, done_flag);
2420                 if (stat == RDWR_STATUS_FAILURE)
2421                         goto done;
2422                 for (reg = reg_start; reg <= reg_end; reg++) {
2423                         *dbg_ptr = sdio_readb(card->func, reg, &ret);
2424                         if (ret) {
2425                                 mwifiex_dbg(adapter, ERROR,
2426                                             "SDIO read err\n");
2427                                 goto done;
2428                         }
2429                         dbg_ptr++;
2430                         if (dbg_ptr >= end_ptr) {
2431                                 u8 *tmp_ptr;
2432 
2433                                 tmp_ptr = vmalloc(entry->mem_size + 0x4000 + 1);
2434                                 if (!tmp_ptr)
2435                                         goto done;
2436 
2437                                 memcpy(tmp_ptr, entry->mem_ptr,
2438                                        entry->mem_size);
2439                                 vfree(entry->mem_ptr);
2440                                 entry->mem_ptr = tmp_ptr;
2441                                 tmp_ptr = NULL;
2442                                 dbg_ptr = entry->mem_ptr + entry->mem_size;
2443                                 entry->mem_size += 0x4000;
2444                                 end_ptr = entry->mem_ptr + entry->mem_size;
2445                         }
2446                 }
2447                 if (stat == RDWR_STATUS_DONE) {
2448                         entry->mem_size = dbg_ptr - entry->mem_ptr;
2449                         mwifiex_dbg(adapter, DUMP, "dump %s done size=0x%x\n",
2450                                     entry->mem_name, entry->mem_size);
2451                         ret = 0;
2452                         break;
2453                 }
2454         }
2455         mwifiex_dbg(adapter, MSG, "== mwifiex firmware dump end ==\n");
2456 
2457 done:
2458         if (ret) {
2459                 mwifiex_dbg(adapter, ERROR, "firmware dump failed\n");
2460                 if (entry->mem_ptr) {
2461                         vfree(entry->mem_ptr);
2462                         entry->mem_ptr = NULL;
2463                 }
2464                 entry->mem_size = 0;
2465         }
2466         sdio_release_host(card->func);
2467 }
2468 
2469 static void mwifiex_sdio_device_dump_work(struct mwifiex_adapter *adapter)
2470 {
2471         struct sdio_mmc_card *card = adapter->card;
2472 
2473         mwifiex_drv_info_dump(adapter);
2474         if (card->fw_dump_enh)
2475                 mwifiex_sdio_generic_fw_dump(adapter);
2476         else
2477                 mwifiex_sdio_fw_dump(adapter);
2478         mwifiex_upload_device_dump(adapter);
2479 }
2480 
2481 static void mwifiex_sdio_work(struct work_struct *work)
2482 {
2483         if (test_and_clear_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP,
2484                                &iface_work_flags))
2485                 mwifiex_sdio_device_dump_work(save_adapter);
2486         if (test_and_clear_bit(MWIFIEX_IFACE_WORK_CARD_RESET,
2487                                &iface_work_flags))
2488                 mwifiex_sdio_card_reset_work(save_adapter);
2489 }
2490 
2491 static DECLARE_WORK(sdio_work, mwifiex_sdio_work);
2492 /* This function resets the card */
2493 static void mwifiex_sdio_card_reset(struct mwifiex_adapter *adapter)
2494 {
2495         save_adapter = adapter;
2496         if (test_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &iface_work_flags))
2497                 return;
2498 
2499         set_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &iface_work_flags);
2500 
2501         schedule_work(&sdio_work);
2502 }
2503 
2504 /* This function dumps FW information */
2505 static void mwifiex_sdio_device_dump(struct mwifiex_adapter *adapter)
2506 {
2507         save_adapter = adapter;
2508         if (test_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &iface_work_flags))
2509                 return;
2510 
2511         set_bit(MWIFIEX_IFACE_WORK_DEVICE_DUMP, &iface_work_flags);
2512         schedule_work(&sdio_work);
2513 }
2514 
2515 /* Function to dump SDIO function registers and SDIO scratch registers in case
2516  * of FW crash
2517  */
2518 static int
2519 mwifiex_sdio_reg_dump(struct mwifiex_adapter *adapter, char *drv_buf)
2520 {
2521         char *p = drv_buf;
2522         struct sdio_mmc_card *cardp = adapter->card;
2523         int ret = 0;
2524         u8 count, func, data, index = 0, size = 0;
2525         u8 reg, reg_start, reg_end;
2526         char buf[256], *ptr;
2527 
2528         if (!p)
2529                 return 0;
2530 
2531         mwifiex_dbg(adapter, MSG, "SDIO register dump start\n");
2532 
2533         mwifiex_pm_wakeup_card(adapter);
2534 
2535         sdio_claim_host(cardp->func);
2536 
2537         for (count = 0; count < 5; count++) {
2538                 memset(buf, 0, sizeof(buf));
2539                 ptr = buf;
2540 
2541                 switch (count) {
2542                 case 0:
2543                         /* Read the registers of SDIO function0 */
2544                         func = count;
2545                         reg_start = 0;
2546                         reg_end = 9;
2547                         break;
2548                 case 1:
2549                         /* Read the registers of SDIO function1 */
2550                         func = count;
2551                         reg_start = cardp->reg->func1_dump_reg_start;
2552                         reg_end = cardp->reg->func1_dump_reg_end;
2553                         break;
2554                 case 2:
2555                         index = 0;
2556                         func = 1;
2557                         reg_start = cardp->reg->func1_spec_reg_table[index++];
2558                         size = cardp->reg->func1_spec_reg_num;
2559                         reg_end = cardp->reg->func1_spec_reg_table[size-1];
2560                         break;
2561                 default:
2562                         /* Read the scratch registers of SDIO function1 */
2563                         if (count == 4)
2564                                 mdelay(100);
2565                         func = 1;
2566                         reg_start = cardp->reg->func1_scratch_reg;
2567                         reg_end = reg_start + MWIFIEX_SDIO_SCRATCH_SIZE;
2568                 }
2569 
2570                 if (count != 2)
2571                         ptr += sprintf(ptr, "SDIO Func%d (%#x-%#x): ",
2572                                        func, reg_start, reg_end);
2573                 else
2574                         ptr += sprintf(ptr, "SDIO Func%d: ", func);
2575 
2576                 for (reg = reg_start; reg <= reg_end;) {
2577                         if (func == 0)
2578                                 data = sdio_f0_readb(cardp->func, reg, &ret);
2579                         else
2580                                 data = sdio_readb(cardp->func, reg, &ret);
2581 
2582                         if (count == 2)
2583                                 ptr += sprintf(ptr, "(%#x) ", reg);
2584                         if (!ret) {
2585                                 ptr += sprintf(ptr, "%02x ", data);
2586                         } else {
2587                                 ptr += sprintf(ptr, "ERR");
2588                                 break;
2589                         }
2590 
2591                         if (count == 2 && reg < reg_end)
2592                                 reg = cardp->reg->func1_spec_reg_table[index++];
2593                         else
2594                                 reg++;
2595                 }
2596 
2597                 mwifiex_dbg(adapter, MSG, "%s\n", buf);
2598                 p += sprintf(p, "%s\n", buf);
2599         }
2600 
2601         sdio_release_host(cardp->func);
2602 
2603         mwifiex_dbg(adapter, MSG, "SDIO register dump end\n");
2604 
2605         return p - drv_buf;
2606 }
2607 
2608 static struct mwifiex_if_ops sdio_ops = {
2609         .init_if = mwifiex_init_sdio,
2610         .cleanup_if = mwifiex_cleanup_sdio,
2611         .check_fw_status = mwifiex_check_fw_status,
2612         .prog_fw = mwifiex_prog_fw_w_helper,
2613         .register_dev = mwifiex_register_dev,
2614         .unregister_dev = mwifiex_unregister_dev,
2615         .enable_int = mwifiex_sdio_enable_host_int,
2616         .disable_int = mwifiex_sdio_disable_host_int,
2617         .process_int_status = mwifiex_process_int_status,
2618         .host_to_card = mwifiex_sdio_host_to_card,
2619         .wakeup = mwifiex_pm_wakeup_card,
2620         .wakeup_complete = mwifiex_pm_wakeup_card_complete,
2621 
2622         /* SDIO specific */
2623         .update_mp_end_port = mwifiex_update_mp_end_port,
2624         .cleanup_mpa_buf = mwifiex_cleanup_mpa_buf,
2625         .cmdrsp_complete = mwifiex_sdio_cmdrsp_complete,
2626         .event_complete = mwifiex_sdio_event_complete,
2627         .card_reset = mwifiex_sdio_card_reset,
2628         .reg_dump = mwifiex_sdio_reg_dump,
2629         .device_dump = mwifiex_sdio_device_dump,
2630         .deaggr_pkt = mwifiex_deaggr_sdio_pkt,
2631 };
2632 
2633 /*
2634  * This function initializes the SDIO driver.
2635  *
2636  * This initiates the semaphore and registers the device with
2637  * SDIO bus.
2638  */
2639 static int
2640 mwifiex_sdio_init_module(void)
2641 {
2642         sema_init(&add_remove_card_sem, 1);
2643 
2644         /* Clear the flag in case user removes the card. */
2645         user_rmmod = 0;
2646 
2647         return sdio_register_driver(&mwifiex_sdio);
2648 }
2649 
2650 /*
2651  * This function cleans up the SDIO driver.
2652  *
2653  * The following major steps are followed for cleanup -
2654  *      - Resume the device if its suspended
2655  *      - Disconnect the device if connected
2656  *      - Shutdown the firmware
2657  *      - Unregister the device from SDIO bus.
2658  */
2659 static void
2660 mwifiex_sdio_cleanup_module(void)
2661 {
2662         if (!down_interruptible(&add_remove_card_sem))
2663                 up(&add_remove_card_sem);
2664 
2665         /* Set the flag as user is removing this module. */
2666         user_rmmod = 1;
2667         cancel_work_sync(&sdio_work);
2668 
2669         sdio_unregister_driver(&mwifiex_sdio);
2670 }
2671 
2672 module_init(mwifiex_sdio_init_module);
2673 module_exit(mwifiex_sdio_cleanup_module);
2674 
2675 MODULE_AUTHOR("Marvell International Ltd.");
2676 MODULE_DESCRIPTION("Marvell WiFi-Ex SDIO Driver version " SDIO_VERSION);
2677 MODULE_VERSION(SDIO_VERSION);
2678 MODULE_LICENSE("GPL v2");
2679 MODULE_FIRMWARE(SD8786_DEFAULT_FW_NAME);
2680 MODULE_FIRMWARE(SD8787_DEFAULT_FW_NAME);
2681 MODULE_FIRMWARE(SD8797_DEFAULT_FW_NAME);
2682 MODULE_FIRMWARE(SD8897_DEFAULT_FW_NAME);
2683 MODULE_FIRMWARE(SD8887_DEFAULT_FW_NAME);
2684 MODULE_FIRMWARE(SD8997_DEFAULT_FW_NAME);
2685 

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