Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

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

  1 /*
  2  * Marvell Wireless LAN device driver: SDIO specific handling
  3  *
  4  * Copyright (C) 2011, Marvell International Ltd.
  5  *
  6  * This software file (the "File") is distributed by Marvell International
  7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
  8  * (the "License").  You may use, redistribute and/or modify this File in
  9  * accordance with the terms and conditions of the License, a copy of which
 10  * is available by writing to the Free Software Foundation, Inc.,
 11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 13  *
 14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 17  * this warranty disclaimer.
 18  */
 19 
 20 #include <linux/firmware.h>
 21 
 22 #include "decl.h"
 23 #include "ioctl.h"
 24 #include "util.h"
 25 #include "fw.h"
 26 #include "main.h"
 27 #include "wmm.h"
 28 #include "11n.h"
 29 #include "sdio.h"
 30 
 31 
 32 #define SDIO_VERSION    "1.0"
 33 
 34 /* The mwifiex_sdio_remove() callback function is called when
 35  * user removes this module from kernel space or ejects
 36  * the card from the slot. The driver handles these 2 cases
 37  * differently.
 38  * If the user is removing the module, the few commands (FUNC_SHUTDOWN,
 39  * HS_CANCEL etc.) are sent to the firmware.
 40  * If the card is removed, there is no need to send these command.
 41  *
 42  * The variable 'user_rmmod' is used to distinguish these two
 43  * scenarios. This flag is initialized as FALSE in case the card
 44  * is removed, and will be set to TRUE for module removal when
 45  * module_exit function is called.
 46  */
 47 static u8 user_rmmod;
 48 
 49 static struct mwifiex_if_ops sdio_ops;
 50 
 51 static struct semaphore add_remove_card_sem;
 52 
 53 /*
 54  * SDIO probe.
 55  *
 56  * This function probes an mwifiex device and registers it. It allocates
 57  * the card structure, enables SDIO function number and initiates the
 58  * device registration and initialization procedure by adding a logical
 59  * interface.
 60  */
 61 static int
 62 mwifiex_sdio_probe(struct sdio_func *func, const struct sdio_device_id *id)
 63 {
 64         int ret;
 65         struct sdio_mmc_card *card = NULL;
 66 
 67         pr_debug("info: vendor=0x%4.04X device=0x%4.04X class=%d function=%d\n",
 68                  func->vendor, func->device, func->class, func->num);
 69 
 70         card = kzalloc(sizeof(struct sdio_mmc_card), GFP_KERNEL);
 71         if (!card)
 72                 return -ENOMEM;
 73 
 74         card->func = func;
 75 
 76         func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
 77 
 78         if (id->driver_data) {
 79                 struct mwifiex_sdio_device *data = (void *)id->driver_data;
 80 
 81                 card->firmware = data->firmware;
 82                 card->reg = data->reg;
 83                 card->max_ports = data->max_ports;
 84                 card->mp_agg_pkt_limit = data->mp_agg_pkt_limit;
 85                 card->supports_sdio_new_mode = data->supports_sdio_new_mode;
 86                 card->has_control_mask = data->has_control_mask;
 87                 card->tx_buf_size = data->tx_buf_size;
 88                 card->mp_tx_agg_buf_size = data->mp_tx_agg_buf_size;
 89                 card->mp_rx_agg_buf_size = data->mp_rx_agg_buf_size;
 90         }
 91 
 92         sdio_claim_host(func);
 93         ret = sdio_enable_func(func);
 94         sdio_release_host(func);
 95 
 96         if (ret) {
 97                 pr_err("%s: failed to enable function\n", __func__);
 98                 kfree(card);
 99                 return -EIO;
100         }
101 
102         if (mwifiex_add_card(card, &add_remove_card_sem, &sdio_ops,
103                              MWIFIEX_SDIO)) {
104                 pr_err("%s: add card failed\n", __func__);
105                 kfree(card);
106                 sdio_claim_host(func);
107                 ret = sdio_disable_func(func);
108                 sdio_release_host(func);
109                 ret = -1;
110         }
111 
112         return ret;
113 }
114 
115 /*
116  * SDIO resume.
117  *
118  * Kernel needs to suspend all functions separately. Therefore all
119  * registered functions must have drivers with suspend and resume
120  * methods. Failing that the kernel simply removes the whole card.
121  *
122  * If already not resumed, this function turns on the traffic and
123  * sends a host sleep cancel request to the firmware.
124  */
125 static int mwifiex_sdio_resume(struct device *dev)
126 {
127         struct sdio_func *func = dev_to_sdio_func(dev);
128         struct sdio_mmc_card *card;
129         struct mwifiex_adapter *adapter;
130         mmc_pm_flag_t pm_flag = 0;
131 
132         if (func) {
133                 pm_flag = sdio_get_host_pm_caps(func);
134                 card = sdio_get_drvdata(func);
135                 if (!card || !card->adapter) {
136                         pr_err("resume: invalid card or adapter\n");
137                         return 0;
138                 }
139         } else {
140                 pr_err("resume: sdio_func is not specified\n");
141                 return 0;
142         }
143 
144         adapter = card->adapter;
145 
146         if (!adapter->is_suspended) {
147                 dev_warn(adapter->dev, "device already resumed\n");
148                 return 0;
149         }
150 
151         adapter->is_suspended = false;
152 
153         /* Disable Host Sleep */
154         mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
155                           MWIFIEX_ASYNC_CMD);
156 
157         return 0;
158 }
159 
160 /*
161  * SDIO remove.
162  *
163  * This function removes the interface and frees up the card structure.
164  */
165 static void
166 mwifiex_sdio_remove(struct sdio_func *func)
167 {
168         struct sdio_mmc_card *card;
169         struct mwifiex_adapter *adapter;
170         struct mwifiex_private *priv;
171 
172         pr_debug("info: SDIO func num=%d\n", func->num);
173 
174         card = sdio_get_drvdata(func);
175         if (!card)
176                 return;
177 
178         adapter = card->adapter;
179         if (!adapter || !adapter->priv_num)
180                 return;
181 
182         if (user_rmmod) {
183                 if (adapter->is_suspended)
184                         mwifiex_sdio_resume(adapter->dev);
185 
186                 mwifiex_deauthenticate_all(adapter);
187 
188                 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
189                 mwifiex_disable_auto_ds(priv);
190                 mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
191         }
192 
193         mwifiex_remove_card(card->adapter, &add_remove_card_sem);
194 }
195 
196 /*
197  * SDIO suspend.
198  *
199  * Kernel needs to suspend all functions separately. Therefore all
200  * registered functions must have drivers with suspend and resume
201  * methods. Failing that the kernel simply removes the whole card.
202  *
203  * If already not suspended, this function allocates and sends a host
204  * sleep activate request to the firmware and turns off the traffic.
205  */
206 static int mwifiex_sdio_suspend(struct device *dev)
207 {
208         struct sdio_func *func = dev_to_sdio_func(dev);
209         struct sdio_mmc_card *card;
210         struct mwifiex_adapter *adapter;
211         mmc_pm_flag_t pm_flag = 0;
212         int ret = 0;
213 
214         if (func) {
215                 pm_flag = sdio_get_host_pm_caps(func);
216                 pr_debug("cmd: %s: suspend: PM flag = 0x%x\n",
217                          sdio_func_id(func), pm_flag);
218                 if (!(pm_flag & MMC_PM_KEEP_POWER)) {
219                         pr_err("%s: cannot remain alive while host is"
220                                 " suspended\n", sdio_func_id(func));
221                         return -ENOSYS;
222                 }
223 
224                 card = sdio_get_drvdata(func);
225                 if (!card || !card->adapter) {
226                         pr_err("suspend: invalid card or adapter\n");
227                         return 0;
228                 }
229         } else {
230                 pr_err("suspend: sdio_func is not specified\n");
231                 return 0;
232         }
233 
234         adapter = card->adapter;
235 
236         /* Enable the Host Sleep */
237         if (!mwifiex_enable_hs(adapter)) {
238                 dev_err(adapter->dev, "cmd: failed to suspend\n");
239                 adapter->hs_enabling = false;
240                 return -EFAULT;
241         }
242 
243         dev_dbg(adapter->dev, "cmd: suspend with MMC_PM_KEEP_POWER\n");
244         ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
245 
246         /* Indicate device suspended */
247         adapter->is_suspended = true;
248         adapter->hs_enabling = false;
249 
250         return ret;
251 }
252 
253 /* Device ID for SD8786 */
254 #define SDIO_DEVICE_ID_MARVELL_8786   (0x9116)
255 /* Device ID for SD8787 */
256 #define SDIO_DEVICE_ID_MARVELL_8787   (0x9119)
257 /* Device ID for SD8797 */
258 #define SDIO_DEVICE_ID_MARVELL_8797   (0x9129)
259 /* Device ID for SD8897 */
260 #define SDIO_DEVICE_ID_MARVELL_8897   (0x912d)
261 
262 /* WLAN IDs */
263 static const struct sdio_device_id mwifiex_ids[] = {
264         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8786),
265                 .driver_data = (unsigned long) &mwifiex_sdio_sd8786},
266         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8787),
267                 .driver_data = (unsigned long) &mwifiex_sdio_sd8787},
268         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797),
269                 .driver_data = (unsigned long) &mwifiex_sdio_sd8797},
270         {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8897),
271                 .driver_data = (unsigned long) &mwifiex_sdio_sd8897},
272         {},
273 };
274 
275 MODULE_DEVICE_TABLE(sdio, mwifiex_ids);
276 
277 static const struct dev_pm_ops mwifiex_sdio_pm_ops = {
278         .suspend = mwifiex_sdio_suspend,
279         .resume = mwifiex_sdio_resume,
280 };
281 
282 static struct sdio_driver mwifiex_sdio = {
283         .name = "mwifiex_sdio",
284         .id_table = mwifiex_ids,
285         .probe = mwifiex_sdio_probe,
286         .remove = mwifiex_sdio_remove,
287         .drv = {
288                 .owner = THIS_MODULE,
289                 .pm = &mwifiex_sdio_pm_ops,
290         }
291 };
292 
293 /* Write data into SDIO card register. Caller claims SDIO device. */
294 static int
295 mwifiex_write_reg_locked(struct sdio_func *func, u32 reg, u8 data)
296 {
297         int ret = -1;
298         sdio_writeb(func, data, reg, &ret);
299         return ret;
300 }
301 
302 /*
303  * This function writes data into SDIO card register.
304  */
305 static int
306 mwifiex_write_reg(struct mwifiex_adapter *adapter, u32 reg, u8 data)
307 {
308         struct sdio_mmc_card *card = adapter->card;
309         int ret;
310 
311         sdio_claim_host(card->func);
312         ret = mwifiex_write_reg_locked(card->func, reg, data);
313         sdio_release_host(card->func);
314 
315         return ret;
316 }
317 
318 /*
319  * This function reads data from SDIO card register.
320  */
321 static int
322 mwifiex_read_reg(struct mwifiex_adapter *adapter, u32 reg, u8 *data)
323 {
324         struct sdio_mmc_card *card = adapter->card;
325         int ret = -1;
326         u8 val;
327 
328         sdio_claim_host(card->func);
329         val = sdio_readb(card->func, reg, &ret);
330         sdio_release_host(card->func);
331 
332         *data = val;
333 
334         return ret;
335 }
336 
337 /*
338  * This function writes multiple data into SDIO card memory.
339  *
340  * This does not work in suspended mode.
341  */
342 static int
343 mwifiex_write_data_sync(struct mwifiex_adapter *adapter,
344                         u8 *buffer, u32 pkt_len, u32 port)
345 {
346         struct sdio_mmc_card *card = adapter->card;
347         int ret;
348         u8 blk_mode =
349                 (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE : BLOCK_MODE;
350         u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
351         u32 blk_cnt =
352                 (blk_mode ==
353                  BLOCK_MODE) ? (pkt_len /
354                                 MWIFIEX_SDIO_BLOCK_SIZE) : pkt_len;
355         u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
356 
357         if (adapter->is_suspended) {
358                 dev_err(adapter->dev,
359                         "%s: not allowed while suspended\n", __func__);
360                 return -1;
361         }
362 
363         sdio_claim_host(card->func);
364 
365         ret = sdio_writesb(card->func, ioport, buffer, blk_cnt * blk_size);
366 
367         sdio_release_host(card->func);
368 
369         return ret;
370 }
371 
372 /*
373  * This function reads multiple data from SDIO card memory.
374  */
375 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *buffer,
376                                   u32 len, u32 port, u8 claim)
377 {
378         struct sdio_mmc_card *card = adapter->card;
379         int ret;
380         u8 blk_mode = (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE
381                        : BLOCK_MODE;
382         u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
383         u32 blk_cnt = (blk_mode == BLOCK_MODE) ? (len / MWIFIEX_SDIO_BLOCK_SIZE)
384                         : len;
385         u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
386 
387         if (claim)
388                 sdio_claim_host(card->func);
389 
390         ret = sdio_readsb(card->func, buffer, ioport, blk_cnt * blk_size);
391 
392         if (claim)
393                 sdio_release_host(card->func);
394 
395         return ret;
396 }
397 
398 /*
399  * This function wakes up the card.
400  *
401  * A host power up command is written to the card configuration
402  * register to wake up the card.
403  */
404 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
405 {
406         dev_dbg(adapter->dev, "event: wakeup device...\n");
407 
408         return mwifiex_write_reg(adapter, CONFIGURATION_REG, HOST_POWER_UP);
409 }
410 
411 /*
412  * This function is called after the card has woken up.
413  *
414  * The card configuration register is reset.
415  */
416 static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
417 {
418         dev_dbg(adapter->dev, "cmd: wakeup device completed\n");
419 
420         return mwifiex_write_reg(adapter, CONFIGURATION_REG, 0);
421 }
422 
423 /*
424  * This function is used to initialize IO ports for the
425  * chipsets supporting SDIO new mode eg SD8897.
426  */
427 static int mwifiex_init_sdio_new_mode(struct mwifiex_adapter *adapter)
428 {
429         u8 reg;
430 
431         adapter->ioport = MEM_PORT;
432 
433         /* enable sdio new mode */
434         if (mwifiex_read_reg(adapter, CARD_CONFIG_2_1_REG, &reg))
435                 return -1;
436         if (mwifiex_write_reg(adapter, CARD_CONFIG_2_1_REG,
437                               reg | CMD53_NEW_MODE))
438                 return -1;
439 
440         /* Configure cmd port and enable reading rx length from the register */
441         if (mwifiex_read_reg(adapter, CMD_CONFIG_0, &reg))
442                 return -1;
443         if (mwifiex_write_reg(adapter, CMD_CONFIG_0, reg | CMD_PORT_RD_LEN_EN))
444                 return -1;
445 
446         /* Enable Dnld/Upld ready auto reset for cmd port after cmd53 is
447          * completed
448          */
449         if (mwifiex_read_reg(adapter, CMD_CONFIG_1, &reg))
450                 return -1;
451         if (mwifiex_write_reg(adapter, CMD_CONFIG_1, reg | CMD_PORT_AUTO_EN))
452                 return -1;
453 
454         return 0;
455 }
456 
457 /* This function initializes the IO ports.
458  *
459  * The following operations are performed -
460  *      - Read the IO ports (0, 1 and 2)
461  *      - Set host interrupt Reset-To-Read to clear
462  *      - Set auto re-enable interrupt
463  */
464 static int mwifiex_init_sdio_ioport(struct mwifiex_adapter *adapter)
465 {
466         u8 reg;
467         struct sdio_mmc_card *card = adapter->card;
468 
469         adapter->ioport = 0;
470 
471         if (card->supports_sdio_new_mode) {
472                 if (mwifiex_init_sdio_new_mode(adapter))
473                         return -1;
474                 goto cont;
475         }
476 
477         /* Read the IO port */
478         if (!mwifiex_read_reg(adapter, IO_PORT_0_REG, &reg))
479                 adapter->ioport |= (reg & 0xff);
480         else
481                 return -1;
482 
483         if (!mwifiex_read_reg(adapter, IO_PORT_1_REG, &reg))
484                 adapter->ioport |= ((reg & 0xff) << 8);
485         else
486                 return -1;
487 
488         if (!mwifiex_read_reg(adapter, IO_PORT_2_REG, &reg))
489                 adapter->ioport |= ((reg & 0xff) << 16);
490         else
491                 return -1;
492 cont:
493         pr_debug("info: SDIO FUNC1 IO port: %#x\n", adapter->ioport);
494 
495         /* Set Host interrupt reset to read to clear */
496         if (!mwifiex_read_reg(adapter, HOST_INT_RSR_REG, &reg))
497                 mwifiex_write_reg(adapter, HOST_INT_RSR_REG,
498                                   reg | card->reg->sdio_int_mask);
499         else
500                 return -1;
501 
502         /* Dnld/Upld ready set to auto reset */
503         if (!mwifiex_read_reg(adapter, card->reg->card_misc_cfg_reg, &reg))
504                 mwifiex_write_reg(adapter, card->reg->card_misc_cfg_reg,
505                                   reg | AUTO_RE_ENABLE_INT);
506         else
507                 return -1;
508 
509         return 0;
510 }
511 
512 /*
513  * This function sends data to the card.
514  */
515 static int mwifiex_write_data_to_card(struct mwifiex_adapter *adapter,
516                                       u8 *payload, u32 pkt_len, u32 port)
517 {
518         u32 i = 0;
519         int ret;
520 
521         do {
522                 ret = mwifiex_write_data_sync(adapter, payload, pkt_len, port);
523                 if (ret) {
524                         i++;
525                         dev_err(adapter->dev, "host_to_card, write iomem"
526                                         " (%d) failed: %d\n", i, ret);
527                         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
528                                 dev_err(adapter->dev, "write CFG reg failed\n");
529 
530                         ret = -1;
531                         if (i > MAX_WRITE_IOMEM_RETRY)
532                                 return ret;
533                 }
534         } while (ret == -1);
535 
536         return ret;
537 }
538 
539 /*
540  * This function gets the read port.
541  *
542  * If control port bit is set in MP read bitmap, the control port
543  * is returned, otherwise the current read port is returned and
544  * the value is increased (provided it does not reach the maximum
545  * limit, in which case it is reset to 1)
546  */
547 static int mwifiex_get_rd_port(struct mwifiex_adapter *adapter, u8 *port)
548 {
549         struct sdio_mmc_card *card = adapter->card;
550         const struct mwifiex_sdio_card_reg *reg = card->reg;
551         u32 rd_bitmap = card->mp_rd_bitmap;
552 
553         dev_dbg(adapter->dev, "data: mp_rd_bitmap=0x%08x\n", rd_bitmap);
554 
555         if (card->supports_sdio_new_mode) {
556                 if (!(rd_bitmap & reg->data_port_mask))
557                         return -1;
558         } else {
559                 if (!(rd_bitmap & (CTRL_PORT_MASK | reg->data_port_mask)))
560                         return -1;
561         }
562 
563         if ((card->has_control_mask) &&
564             (card->mp_rd_bitmap & CTRL_PORT_MASK)) {
565                 card->mp_rd_bitmap &= (u32) (~CTRL_PORT_MASK);
566                 *port = CTRL_PORT;
567                 dev_dbg(adapter->dev, "data: port=%d mp_rd_bitmap=0x%08x\n",
568                         *port, card->mp_rd_bitmap);
569                 return 0;
570         }
571 
572         if (!(card->mp_rd_bitmap & (1 << card->curr_rd_port)))
573                 return -1;
574 
575         /* We are now handling the SDIO data ports */
576         card->mp_rd_bitmap &= (u32)(~(1 << card->curr_rd_port));
577         *port = card->curr_rd_port;
578 
579         if (++card->curr_rd_port == card->max_ports)
580                 card->curr_rd_port = reg->start_rd_port;
581 
582         dev_dbg(adapter->dev,
583                 "data: port=%d mp_rd_bitmap=0x%08x -> 0x%08x\n",
584                 *port, rd_bitmap, card->mp_rd_bitmap);
585 
586         return 0;
587 }
588 
589 /*
590  * This function gets the write port for data.
591  *
592  * The current write port is returned if available and the value is
593  * increased (provided it does not reach the maximum limit, in which
594  * case it is reset to 1)
595  */
596 static int mwifiex_get_wr_port_data(struct mwifiex_adapter *adapter, u32 *port)
597 {
598         struct sdio_mmc_card *card = adapter->card;
599         const struct mwifiex_sdio_card_reg *reg = card->reg;
600         u32 wr_bitmap = card->mp_wr_bitmap;
601 
602         dev_dbg(adapter->dev, "data: mp_wr_bitmap=0x%08x\n", wr_bitmap);
603 
604         if (card->supports_sdio_new_mode &&
605             !(wr_bitmap & reg->data_port_mask)) {
606                 adapter->data_sent = true;
607                 return -EBUSY;
608         } else if (!card->supports_sdio_new_mode &&
609                    !(wr_bitmap & card->mp_data_port_mask)) {
610                 return -1;
611         }
612 
613         if (card->mp_wr_bitmap & (1 << card->curr_wr_port)) {
614                 card->mp_wr_bitmap &= (u32) (~(1 << card->curr_wr_port));
615                 *port = card->curr_wr_port;
616                 if (((card->supports_sdio_new_mode) &&
617                      (++card->curr_wr_port == card->max_ports)) ||
618                     ((!card->supports_sdio_new_mode) &&
619                      (++card->curr_wr_port == card->mp_end_port)))
620                         card->curr_wr_port = reg->start_wr_port;
621         } else {
622                 adapter->data_sent = true;
623                 return -EBUSY;
624         }
625 
626         if ((card->has_control_mask) && (*port == CTRL_PORT)) {
627                 dev_err(adapter->dev,
628                         "invalid data port=%d cur port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
629                         *port, card->curr_wr_port, wr_bitmap,
630                         card->mp_wr_bitmap);
631                 return -1;
632         }
633 
634         dev_dbg(adapter->dev, "data: port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
635                 *port, wr_bitmap, card->mp_wr_bitmap);
636 
637         return 0;
638 }
639 
640 /*
641  * This function polls the card status.
642  */
643 static int
644 mwifiex_sdio_poll_card_status(struct mwifiex_adapter *adapter, u8 bits)
645 {
646         struct sdio_mmc_card *card = adapter->card;
647         u32 tries;
648         u8 cs;
649 
650         for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
651                 if (mwifiex_read_reg(adapter, card->reg->poll_reg, &cs))
652                         break;
653                 else if ((cs & bits) == bits)
654                         return 0;
655 
656                 usleep_range(10, 20);
657         }
658 
659         dev_err(adapter->dev, "poll card status failed, tries = %d\n", tries);
660 
661         return -1;
662 }
663 
664 /*
665  * This function reads the firmware status.
666  */
667 static int
668 mwifiex_sdio_read_fw_status(struct mwifiex_adapter *adapter, u16 *dat)
669 {
670         struct sdio_mmc_card *card = adapter->card;
671         const struct mwifiex_sdio_card_reg *reg = card->reg;
672         u8 fws0, fws1;
673 
674         if (mwifiex_read_reg(adapter, reg->status_reg_0, &fws0))
675                 return -1;
676 
677         if (mwifiex_read_reg(adapter, reg->status_reg_1, &fws1))
678                 return -1;
679 
680         *dat = (u16) ((fws1 << 8) | fws0);
681 
682         return 0;
683 }
684 
685 /*
686  * This function disables the host interrupt.
687  *
688  * The host interrupt mask is read, the disable bit is reset and
689  * written back to the card host interrupt mask register.
690  */
691 static void mwifiex_sdio_disable_host_int(struct mwifiex_adapter *adapter)
692 {
693         struct sdio_mmc_card *card = adapter->card;
694         struct sdio_func *func = card->func;
695 
696         sdio_claim_host(func);
697         mwifiex_write_reg_locked(func, HOST_INT_MASK_REG, 0);
698         sdio_release_irq(func);
699         sdio_release_host(func);
700 }
701 
702 /*
703  * This function reads the interrupt status from card.
704  */
705 static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter)
706 {
707         struct sdio_mmc_card *card = adapter->card;
708         u8 sdio_ireg;
709         unsigned long flags;
710 
711         if (mwifiex_read_data_sync(adapter, card->mp_regs,
712                                    card->reg->max_mp_regs,
713                                    REG_PORT | MWIFIEX_SDIO_BYTE_MODE_MASK, 0)) {
714                 dev_err(adapter->dev, "read mp_regs failed\n");
715                 return;
716         }
717 
718         sdio_ireg = card->mp_regs[HOST_INTSTATUS_REG];
719         if (sdio_ireg) {
720                 /*
721                  * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
722                  * For SDIO new mode CMD port interrupts
723                  *      DN_LD_CMD_PORT_HOST_INT_STATUS and/or
724                  *      UP_LD_CMD_PORT_HOST_INT_STATUS
725                  * Clear the interrupt status register
726                  */
727                 dev_dbg(adapter->dev, "int: sdio_ireg = %#x\n", sdio_ireg);
728                 spin_lock_irqsave(&adapter->int_lock, flags);
729                 adapter->int_status |= sdio_ireg;
730                 spin_unlock_irqrestore(&adapter->int_lock, flags);
731         }
732 }
733 
734 /*
735  * SDIO interrupt handler.
736  *
737  * This function reads the interrupt status from firmware and handles
738  * the interrupt in current thread (ksdioirqd) right away.
739  */
740 static void
741 mwifiex_sdio_interrupt(struct sdio_func *func)
742 {
743         struct mwifiex_adapter *adapter;
744         struct sdio_mmc_card *card;
745 
746         card = sdio_get_drvdata(func);
747         if (!card || !card->adapter) {
748                 pr_debug("int: func=%p card=%p adapter=%p\n",
749                          func, card, card ? card->adapter : NULL);
750                 return;
751         }
752         adapter = card->adapter;
753 
754         if (!adapter->pps_uapsd_mode && adapter->ps_state == PS_STATE_SLEEP)
755                 adapter->ps_state = PS_STATE_AWAKE;
756 
757         mwifiex_interrupt_status(adapter);
758         mwifiex_main_process(adapter);
759 }
760 
761 /*
762  * This function enables the host interrupt.
763  *
764  * The host interrupt enable mask is written to the card
765  * host interrupt mask register.
766  */
767 static int mwifiex_sdio_enable_host_int(struct mwifiex_adapter *adapter)
768 {
769         struct sdio_mmc_card *card = adapter->card;
770         struct sdio_func *func = card->func;
771         int ret;
772 
773         sdio_claim_host(func);
774 
775         /* Request the SDIO IRQ */
776         ret = sdio_claim_irq(func, mwifiex_sdio_interrupt);
777         if (ret) {
778                 dev_err(adapter->dev, "claim irq failed: ret=%d\n", ret);
779                 goto out;
780         }
781 
782         /* Simply write the mask to the register */
783         ret = mwifiex_write_reg_locked(func, HOST_INT_MASK_REG,
784                                        card->reg->host_int_enable);
785         if (ret) {
786                 dev_err(adapter->dev, "enable host interrupt failed\n");
787                 sdio_release_irq(func);
788         }
789 
790 out:
791         sdio_release_host(func);
792         return ret;
793 }
794 
795 /*
796  * This function sends a data buffer to the card.
797  */
798 static int mwifiex_sdio_card_to_host(struct mwifiex_adapter *adapter,
799                                      u32 *type, u8 *buffer,
800                                      u32 npayload, u32 ioport)
801 {
802         int ret;
803         u32 nb;
804 
805         if (!buffer) {
806                 dev_err(adapter->dev, "%s: buffer is NULL\n", __func__);
807                 return -1;
808         }
809 
810         ret = mwifiex_read_data_sync(adapter, buffer, npayload, ioport, 1);
811 
812         if (ret) {
813                 dev_err(adapter->dev, "%s: read iomem failed: %d\n", __func__,
814                         ret);
815                 return -1;
816         }
817 
818         nb = le16_to_cpu(*(__le16 *) (buffer));
819         if (nb > npayload) {
820                 dev_err(adapter->dev, "%s: invalid packet, nb=%d npayload=%d\n",
821                         __func__, nb, npayload);
822                 return -1;
823         }
824 
825         *type = le16_to_cpu(*(__le16 *) (buffer + 2));
826 
827         return ret;
828 }
829 
830 /*
831  * This function downloads the firmware to the card.
832  *
833  * Firmware is downloaded to the card in blocks. Every block download
834  * is tested for CRC errors, and retried a number of times before
835  * returning failure.
836  */
837 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
838                                     struct mwifiex_fw_image *fw)
839 {
840         struct sdio_mmc_card *card = adapter->card;
841         const struct mwifiex_sdio_card_reg *reg = card->reg;
842         int ret;
843         u8 *firmware = fw->fw_buf;
844         u32 firmware_len = fw->fw_len;
845         u32 offset = 0;
846         u8 base0, base1;
847         u8 *fwbuf;
848         u16 len = 0;
849         u32 txlen, tx_blocks = 0, tries;
850         u32 i = 0;
851 
852         if (!firmware_len) {
853                 dev_err(adapter->dev,
854                         "firmware image not found! Terminating download\n");
855                 return -1;
856         }
857 
858         dev_dbg(adapter->dev, "info: downloading FW image (%d bytes)\n",
859                 firmware_len);
860 
861         /* Assume that the allocated buffer is 8-byte aligned */
862         fwbuf = kzalloc(MWIFIEX_UPLD_SIZE, GFP_KERNEL);
863         if (!fwbuf)
864                 return -ENOMEM;
865 
866         /* Perform firmware data transfer */
867         do {
868                 /* The host polls for the DN_LD_CARD_RDY and CARD_IO_READY
869                    bits */
870                 ret = mwifiex_sdio_poll_card_status(adapter, CARD_IO_READY |
871                                                     DN_LD_CARD_RDY);
872                 if (ret) {
873                         dev_err(adapter->dev, "FW download with helper:"
874                                 " poll status timeout @ %d\n", offset);
875                         goto done;
876                 }
877 
878                 /* More data? */
879                 if (offset >= firmware_len)
880                         break;
881 
882                 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
883                         ret = mwifiex_read_reg(adapter, reg->base_0_reg,
884                                                &base0);
885                         if (ret) {
886                                 dev_err(adapter->dev,
887                                         "dev BASE0 register read failed: "
888                                         "base0=%#04X(%d). Terminating dnld\n",
889                                         base0, base0);
890                                 goto done;
891                         }
892                         ret = mwifiex_read_reg(adapter, reg->base_1_reg,
893                                                &base1);
894                         if (ret) {
895                                 dev_err(adapter->dev,
896                                         "dev BASE1 register read failed: "
897                                         "base1=%#04X(%d). Terminating dnld\n",
898                                         base1, base1);
899                                 goto done;
900                         }
901                         len = (u16) (((base1 & 0xff) << 8) | (base0 & 0xff));
902 
903                         if (len)
904                                 break;
905 
906                         usleep_range(10, 20);
907                 }
908 
909                 if (!len) {
910                         break;
911                 } else if (len > MWIFIEX_UPLD_SIZE) {
912                         dev_err(adapter->dev,
913                                 "FW dnld failed @ %d, invalid length %d\n",
914                                 offset, len);
915                         ret = -1;
916                         goto done;
917                 }
918 
919                 txlen = len;
920 
921                 if (len & BIT(0)) {
922                         i++;
923                         if (i > MAX_WRITE_IOMEM_RETRY) {
924                                 dev_err(adapter->dev,
925                                         "FW dnld failed @ %d, over max retry\n",
926                                         offset);
927                                 ret = -1;
928                                 goto done;
929                         }
930                         dev_err(adapter->dev, "CRC indicated by the helper:"
931                                 " len = 0x%04X, txlen = %d\n", len, txlen);
932                         len &= ~BIT(0);
933                         /* Setting this to 0 to resend from same offset */
934                         txlen = 0;
935                 } else {
936                         i = 0;
937 
938                         /* Set blocksize to transfer - checking for last
939                            block */
940                         if (firmware_len - offset < txlen)
941                                 txlen = firmware_len - offset;
942 
943                         tx_blocks = (txlen + MWIFIEX_SDIO_BLOCK_SIZE - 1)
944                                     / MWIFIEX_SDIO_BLOCK_SIZE;
945 
946                         /* Copy payload to buffer */
947                         memmove(fwbuf, &firmware[offset], txlen);
948                 }
949 
950                 ret = mwifiex_write_data_sync(adapter, fwbuf, tx_blocks *
951                                               MWIFIEX_SDIO_BLOCK_SIZE,
952                                               adapter->ioport);
953                 if (ret) {
954                         dev_err(adapter->dev,
955                                 "FW download, write iomem (%d) failed @ %d\n",
956                                 i, offset);
957                         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
958                                 dev_err(adapter->dev, "write CFG reg failed\n");
959 
960                         ret = -1;
961                         goto done;
962                 }
963 
964                 offset += txlen;
965         } while (true);
966 
967         dev_dbg(adapter->dev, "info: FW download over, size %d bytes\n",
968                 offset);
969 
970         ret = 0;
971 done:
972         kfree(fwbuf);
973         return ret;
974 }
975 
976 /*
977  * This function checks the firmware status in card.
978  *
979  * The winner interface is also determined by this function.
980  */
981 static int mwifiex_check_fw_status(struct mwifiex_adapter *adapter,
982                                    u32 poll_num)
983 {
984         struct sdio_mmc_card *card = adapter->card;
985         int ret = 0;
986         u16 firmware_stat;
987         u32 tries;
988         u8 winner_status;
989 
990         /* Wait for firmware initialization event */
991         for (tries = 0; tries < poll_num; tries++) {
992                 ret = mwifiex_sdio_read_fw_status(adapter, &firmware_stat);
993                 if (ret)
994                         continue;
995                 if (firmware_stat == FIRMWARE_READY_SDIO) {
996                         ret = 0;
997                         break;
998                 } else {
999                         msleep(100);
1000                         ret = -1;
1001                 }
1002         }
1003 
1004         if (ret) {
1005                 if (mwifiex_read_reg
1006                     (adapter, card->reg->status_reg_0, &winner_status))
1007                         winner_status = 0;
1008 
1009                 if (winner_status)
1010                         adapter->winner = 0;
1011                 else
1012                         adapter->winner = 1;
1013         }
1014         return ret;
1015 }
1016 
1017 /*
1018  * This function decodes a received packet.
1019  *
1020  * Based on the type, the packet is treated as either a data, or
1021  * a command response, or an event, and the correct handler
1022  * function is invoked.
1023  */
1024 static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter,
1025                                     struct sk_buff *skb, u32 upld_typ)
1026 {
1027         u8 *cmd_buf;
1028         __le16 *curr_ptr = (__le16 *)skb->data;
1029         u16 pkt_len = le16_to_cpu(*curr_ptr);
1030 
1031         skb_trim(skb, pkt_len);
1032         skb_pull(skb, INTF_HEADER_LEN);
1033 
1034         switch (upld_typ) {
1035         case MWIFIEX_TYPE_DATA:
1036                 dev_dbg(adapter->dev, "info: --- Rx: Data packet ---\n");
1037                 mwifiex_handle_rx_packet(adapter, skb);
1038                 break;
1039 
1040         case MWIFIEX_TYPE_CMD:
1041                 dev_dbg(adapter->dev, "info: --- Rx: Cmd Response ---\n");
1042                 /* take care of curr_cmd = NULL case */
1043                 if (!adapter->curr_cmd) {
1044                         cmd_buf = adapter->upld_buf;
1045 
1046                         if (adapter->ps_state == PS_STATE_SLEEP_CFM)
1047                                 mwifiex_process_sleep_confirm_resp(adapter,
1048                                                                    skb->data,
1049                                                                    skb->len);
1050 
1051                         memcpy(cmd_buf, skb->data,
1052                                min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER,
1053                                      skb->len));
1054 
1055                         dev_kfree_skb_any(skb);
1056                 } else {
1057                         adapter->cmd_resp_received = true;
1058                         adapter->curr_cmd->resp_skb = skb;
1059                 }
1060                 break;
1061 
1062         case MWIFIEX_TYPE_EVENT:
1063                 dev_dbg(adapter->dev, "info: --- Rx: Event ---\n");
1064                 adapter->event_cause = le32_to_cpu(*(__le32 *) skb->data);
1065 
1066                 if ((skb->len > 0) && (skb->len  < MAX_EVENT_SIZE))
1067                         memcpy(adapter->event_body,
1068                                skb->data + MWIFIEX_EVENT_HEADER_LEN,
1069                                skb->len);
1070 
1071                 /* event cause has been saved to adapter->event_cause */
1072                 adapter->event_received = true;
1073                 adapter->event_skb = skb;
1074 
1075                 break;
1076 
1077         default:
1078                 dev_err(adapter->dev, "unknown upload type %#x\n", upld_typ);
1079                 dev_kfree_skb_any(skb);
1080                 break;
1081         }
1082 
1083         return 0;
1084 }
1085 
1086 /*
1087  * This function transfers received packets from card to driver, performing
1088  * aggregation if required.
1089  *
1090  * For data received on control port, or if aggregation is disabled, the
1091  * received buffers are uploaded as separate packets. However, if aggregation
1092  * is enabled and required, the buffers are copied onto an aggregation buffer,
1093  * provided there is space left, processed and finally uploaded.
1094  */
1095 static int mwifiex_sdio_card_to_host_mp_aggr(struct mwifiex_adapter *adapter,
1096                                              struct sk_buff *skb, u8 port)
1097 {
1098         struct sdio_mmc_card *card = adapter->card;
1099         s32 f_do_rx_aggr = 0;
1100         s32 f_do_rx_cur = 0;
1101         s32 f_aggr_cur = 0;
1102         struct sk_buff *skb_deaggr;
1103         u32 pind;
1104         u32 pkt_len, pkt_type, mport;
1105         u8 *curr_ptr;
1106         u32 rx_len = skb->len;
1107 
1108         if ((card->has_control_mask) && (port == CTRL_PORT)) {
1109                 /* Read the command Resp without aggr */
1110                 dev_dbg(adapter->dev, "info: %s: no aggregation for cmd "
1111                         "response\n", __func__);
1112 
1113                 f_do_rx_cur = 1;
1114                 goto rx_curr_single;
1115         }
1116 
1117         if (!card->mpa_rx.enabled) {
1118                 dev_dbg(adapter->dev, "info: %s: rx aggregation disabled\n",
1119                         __func__);
1120 
1121                 f_do_rx_cur = 1;
1122                 goto rx_curr_single;
1123         }
1124 
1125         if ((!card->has_control_mask && (card->mp_rd_bitmap &
1126                                          card->reg->data_port_mask)) ||
1127             (card->has_control_mask && (card->mp_rd_bitmap &
1128                                         (~((u32) CTRL_PORT_MASK))))) {
1129                 /* Some more data RX pending */
1130                 dev_dbg(adapter->dev, "info: %s: not last packet\n", __func__);
1131 
1132                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1133                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len)) {
1134                                 f_aggr_cur = 1;
1135                         } else {
1136                                 /* No room in Aggr buf, do rx aggr now */
1137                                 f_do_rx_aggr = 1;
1138                                 f_do_rx_cur = 1;
1139                         }
1140                 } else {
1141                         /* Rx aggr not in progress */
1142                         f_aggr_cur = 1;
1143                 }
1144 
1145         } else {
1146                 /* No more data RX pending */
1147                 dev_dbg(adapter->dev, "info: %s: last packet\n", __func__);
1148 
1149                 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1150                         f_do_rx_aggr = 1;
1151                         if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len))
1152                                 f_aggr_cur = 1;
1153                         else
1154                                 /* No room in Aggr buf, do rx aggr now */
1155                                 f_do_rx_cur = 1;
1156                 } else {
1157                         f_do_rx_cur = 1;
1158                 }
1159         }
1160 
1161         if (f_aggr_cur) {
1162                 dev_dbg(adapter->dev, "info: current packet aggregation\n");
1163                 /* Curr pkt can be aggregated */
1164                 mp_rx_aggr_setup(card, skb, port);
1165 
1166                 if (MP_RX_AGGR_PKT_LIMIT_REACHED(card) ||
1167                     mp_rx_aggr_port_limit_reached(card)) {
1168                         dev_dbg(adapter->dev, "info: %s: aggregated packet "
1169                                 "limit reached\n", __func__);
1170                         /* No more pkts allowed in Aggr buf, rx it */
1171                         f_do_rx_aggr = 1;
1172                 }
1173         }
1174 
1175         if (f_do_rx_aggr) {
1176                 /* do aggr RX now */
1177                 dev_dbg(adapter->dev, "info: do_rx_aggr: num of packets: %d\n",
1178                         card->mpa_rx.pkt_cnt);
1179 
1180                 if (card->supports_sdio_new_mode) {
1181                         int i;
1182                         u32 port_count;
1183 
1184                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1185                                 if (card->mpa_rx.ports & BIT(i))
1186                                         port_count++;
1187 
1188                         /* Reading data from "start_port + 0" to "start_port +
1189                          * port_count -1", so decrease the count by 1
1190                          */
1191                         port_count--;
1192                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1193                                  (port_count << 8)) + card->mpa_rx.start_port;
1194                 } else {
1195                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1196                                  (card->mpa_rx.ports << 4)) +
1197                                  card->mpa_rx.start_port;
1198                 }
1199 
1200                 if (mwifiex_read_data_sync(adapter, card->mpa_rx.buf,
1201                                            card->mpa_rx.buf_len, mport, 1))
1202                         goto error;
1203 
1204                 curr_ptr = card->mpa_rx.buf;
1205 
1206                 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1207 
1208                         /* get curr PKT len & type */
1209                         pkt_len = le16_to_cpu(*(__le16 *) &curr_ptr[0]);
1210                         pkt_type = le16_to_cpu(*(__le16 *) &curr_ptr[2]);
1211 
1212                         /* copy pkt to deaggr buf */
1213                         skb_deaggr = card->mpa_rx.skb_arr[pind];
1214 
1215                         if ((pkt_type == MWIFIEX_TYPE_DATA) && (pkt_len <=
1216                                          card->mpa_rx.len_arr[pind])) {
1217 
1218                                 memcpy(skb_deaggr->data, curr_ptr, pkt_len);
1219 
1220                                 skb_trim(skb_deaggr, pkt_len);
1221 
1222                                 /* Process de-aggr packet */
1223                                 mwifiex_decode_rx_packet(adapter, skb_deaggr,
1224                                                          pkt_type);
1225                         } else {
1226                                 dev_err(adapter->dev, "wrong aggr pkt:"
1227                                         " type=%d len=%d max_len=%d\n",
1228                                         pkt_type, pkt_len,
1229                                         card->mpa_rx.len_arr[pind]);
1230                                 dev_kfree_skb_any(skb_deaggr);
1231                         }
1232                         curr_ptr += card->mpa_rx.len_arr[pind];
1233                 }
1234                 MP_RX_AGGR_BUF_RESET(card);
1235         }
1236 
1237 rx_curr_single:
1238         if (f_do_rx_cur) {
1239                 dev_dbg(adapter->dev, "info: RX: port: %d, rx_len: %d\n",
1240                         port, rx_len);
1241 
1242                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
1243                                               skb->data, skb->len,
1244                                               adapter->ioport + port))
1245                         goto error;
1246 
1247                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1248         }
1249 
1250         return 0;
1251 
1252 error:
1253         if (MP_RX_AGGR_IN_PROGRESS(card)) {
1254                 /* Multiport-aggregation transfer failed - cleanup */
1255                 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1256                         /* copy pkt to deaggr buf */
1257                         skb_deaggr = card->mpa_rx.skb_arr[pind];
1258                         dev_kfree_skb_any(skb_deaggr);
1259                 }
1260                 MP_RX_AGGR_BUF_RESET(card);
1261         }
1262 
1263         if (f_do_rx_cur)
1264                 /* Single transfer pending. Free curr buff also */
1265                 dev_kfree_skb_any(skb);
1266 
1267         return -1;
1268 }
1269 
1270 /*
1271  * This function checks the current interrupt status.
1272  *
1273  * The following interrupts are checked and handled by this function -
1274  *      - Data sent
1275  *      - Command sent
1276  *      - Packets received
1277  *
1278  * Since the firmware does not generate download ready interrupt if the
1279  * port updated is command port only, command sent interrupt checking
1280  * should be done manually, and for every SDIO interrupt.
1281  *
1282  * In case of Rx packets received, the packets are uploaded from card to
1283  * host and processed accordingly.
1284  */
1285 static int mwifiex_process_int_status(struct mwifiex_adapter *adapter)
1286 {
1287         struct sdio_mmc_card *card = adapter->card;
1288         const struct mwifiex_sdio_card_reg *reg = card->reg;
1289         int ret = 0;
1290         u8 sdio_ireg;
1291         struct sk_buff *skb;
1292         u8 port = CTRL_PORT;
1293         u32 len_reg_l, len_reg_u;
1294         u32 rx_blocks;
1295         u16 rx_len;
1296         unsigned long flags;
1297         u32 bitmap;
1298         u8 cr;
1299 
1300         spin_lock_irqsave(&adapter->int_lock, flags);
1301         sdio_ireg = adapter->int_status;
1302         adapter->int_status = 0;
1303         spin_unlock_irqrestore(&adapter->int_lock, flags);
1304 
1305         if (!sdio_ireg)
1306                 return ret;
1307 
1308         /* Following interrupt is only for SDIO new mode */
1309         if (sdio_ireg & DN_LD_CMD_PORT_HOST_INT_STATUS && adapter->cmd_sent)
1310                 adapter->cmd_sent = false;
1311 
1312         /* Following interrupt is only for SDIO new mode */
1313         if (sdio_ireg & UP_LD_CMD_PORT_HOST_INT_STATUS) {
1314                 u32 pkt_type;
1315 
1316                 /* read the len of control packet */
1317                 rx_len = card->mp_regs[CMD_RD_LEN_1] << 8;
1318                 rx_len |= (u16) card->mp_regs[CMD_RD_LEN_0];
1319                 rx_blocks = DIV_ROUND_UP(rx_len, MWIFIEX_SDIO_BLOCK_SIZE);
1320                 if (rx_len <= INTF_HEADER_LEN ||
1321                     (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1322                      MWIFIEX_RX_DATA_BUF_SIZE)
1323                         return -1;
1324                 rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1325 
1326                 skb = dev_alloc_skb(rx_len);
1327                 if (!skb)
1328                         return -1;
1329 
1330                 skb_put(skb, rx_len);
1331 
1332                 if (mwifiex_sdio_card_to_host(adapter, &pkt_type, skb->data,
1333                                               skb->len, adapter->ioport |
1334                                                         CMD_PORT_SLCT)) {
1335                         dev_err(adapter->dev,
1336                                 "%s: failed to card_to_host", __func__);
1337                         dev_kfree_skb_any(skb);
1338                         goto term_cmd;
1339                 }
1340 
1341                 if ((pkt_type != MWIFIEX_TYPE_CMD) &&
1342                     (pkt_type != MWIFIEX_TYPE_EVENT))
1343                         dev_err(adapter->dev,
1344                                 "%s:Received wrong packet on cmd port",
1345                                 __func__);
1346 
1347                 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1348         }
1349 
1350         if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
1351                 bitmap = (u32) card->mp_regs[reg->wr_bitmap_l];
1352                 bitmap |= ((u32) card->mp_regs[reg->wr_bitmap_u]) << 8;
1353                 if (card->supports_sdio_new_mode) {
1354                         bitmap |=
1355                                 ((u32) card->mp_regs[reg->wr_bitmap_1l]) << 16;
1356                         bitmap |=
1357                                 ((u32) card->mp_regs[reg->wr_bitmap_1u]) << 24;
1358                 }
1359                 card->mp_wr_bitmap = bitmap;
1360 
1361                 dev_dbg(adapter->dev, "int: DNLD: wr_bitmap=0x%x\n",
1362                         card->mp_wr_bitmap);
1363                 if (adapter->data_sent &&
1364                     (card->mp_wr_bitmap & card->mp_data_port_mask)) {
1365                         dev_dbg(adapter->dev,
1366                                 "info:  <--- Tx DONE Interrupt --->\n");
1367                         adapter->data_sent = false;
1368                 }
1369         }
1370 
1371         /* As firmware will not generate download ready interrupt if the port
1372            updated is command port only, cmd_sent should be done for any SDIO
1373            interrupt. */
1374         if (card->has_control_mask && adapter->cmd_sent) {
1375                 /* Check if firmware has attach buffer at command port and
1376                    update just that in wr_bit_map. */
1377                 card->mp_wr_bitmap |=
1378                         (u32) card->mp_regs[reg->wr_bitmap_l] & CTRL_PORT_MASK;
1379                 if (card->mp_wr_bitmap & CTRL_PORT_MASK)
1380                         adapter->cmd_sent = false;
1381         }
1382 
1383         dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n",
1384                 adapter->cmd_sent, adapter->data_sent);
1385         if (sdio_ireg & UP_LD_HOST_INT_STATUS) {
1386                 bitmap = (u32) card->mp_regs[reg->rd_bitmap_l];
1387                 bitmap |= ((u32) card->mp_regs[reg->rd_bitmap_u]) << 8;
1388                 if (card->supports_sdio_new_mode) {
1389                         bitmap |=
1390                                 ((u32) card->mp_regs[reg->rd_bitmap_1l]) << 16;
1391                         bitmap |=
1392                                 ((u32) card->mp_regs[reg->rd_bitmap_1u]) << 24;
1393                 }
1394                 card->mp_rd_bitmap = bitmap;
1395                 dev_dbg(adapter->dev, "int: UPLD: rd_bitmap=0x%x\n",
1396                         card->mp_rd_bitmap);
1397 
1398                 while (true) {
1399                         ret = mwifiex_get_rd_port(adapter, &port);
1400                         if (ret) {
1401                                 dev_dbg(adapter->dev,
1402                                         "info: no more rd_port available\n");
1403                                 break;
1404                         }
1405                         len_reg_l = reg->rd_len_p0_l + (port << 1);
1406                         len_reg_u = reg->rd_len_p0_u + (port << 1);
1407                         rx_len = ((u16) card->mp_regs[len_reg_u]) << 8;
1408                         rx_len |= (u16) card->mp_regs[len_reg_l];
1409                         dev_dbg(adapter->dev, "info: RX: port=%d rx_len=%u\n",
1410                                 port, rx_len);
1411                         rx_blocks =
1412                                 (rx_len + MWIFIEX_SDIO_BLOCK_SIZE -
1413                                  1) / MWIFIEX_SDIO_BLOCK_SIZE;
1414                         if (rx_len <= INTF_HEADER_LEN ||
1415                             (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1416                              MWIFIEX_RX_DATA_BUF_SIZE) {
1417                                 dev_err(adapter->dev, "invalid rx_len=%d\n",
1418                                         rx_len);
1419                                 return -1;
1420                         }
1421                         rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1422 
1423                         skb = dev_alloc_skb(rx_len);
1424 
1425                         if (!skb) {
1426                                 dev_err(adapter->dev, "%s: failed to alloc skb",
1427                                         __func__);
1428                                 return -1;
1429                         }
1430 
1431                         skb_put(skb, rx_len);
1432 
1433                         dev_dbg(adapter->dev, "info: rx_len = %d skb->len = %d\n",
1434                                 rx_len, skb->len);
1435 
1436                         if (mwifiex_sdio_card_to_host_mp_aggr(adapter, skb,
1437                                                               port)) {
1438                                 dev_err(adapter->dev, "card_to_host_mpa failed:"
1439                                         " int status=%#x\n", sdio_ireg);
1440                                 goto term_cmd;
1441                         }
1442                 }
1443         }
1444 
1445         return 0;
1446 
1447 term_cmd:
1448         /* terminate cmd */
1449         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1450                 dev_err(adapter->dev, "read CFG reg failed\n");
1451         else
1452                 dev_dbg(adapter->dev, "info: CFG reg val = %d\n", cr);
1453 
1454         if (mwifiex_write_reg(adapter, CONFIGURATION_REG, (cr | 0x04)))
1455                 dev_err(adapter->dev, "write CFG reg failed\n");
1456         else
1457                 dev_dbg(adapter->dev, "info: write success\n");
1458 
1459         if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1460                 dev_err(adapter->dev, "read CFG reg failed\n");
1461         else
1462                 dev_dbg(adapter->dev, "info: CFG reg val =%x\n", cr);
1463 
1464         return -1;
1465 }
1466 
1467 /*
1468  * This function aggregates transmission buffers in driver and downloads
1469  * the aggregated packet to card.
1470  *
1471  * The individual packets are aggregated by copying into an aggregation
1472  * buffer and then downloaded to the card. Previous unsent packets in the
1473  * aggregation buffer are pre-copied first before new packets are added.
1474  * Aggregation is done till there is space left in the aggregation buffer,
1475  * or till new packets are available.
1476  *
1477  * The function will only download the packet to the card when aggregation
1478  * stops, otherwise it will just aggregate the packet in aggregation buffer
1479  * and return.
1480  */
1481 static int mwifiex_host_to_card_mp_aggr(struct mwifiex_adapter *adapter,
1482                                         u8 *payload, u32 pkt_len, u32 port,
1483                                         u32 next_pkt_len)
1484 {
1485         struct sdio_mmc_card *card = adapter->card;
1486         int ret = 0;
1487         s32 f_send_aggr_buf = 0;
1488         s32 f_send_cur_buf = 0;
1489         s32 f_precopy_cur_buf = 0;
1490         s32 f_postcopy_cur_buf = 0;
1491         u32 mport;
1492 
1493         if (!card->mpa_tx.enabled ||
1494             (card->has_control_mask && (port == CTRL_PORT)) ||
1495             (card->supports_sdio_new_mode && (port == CMD_PORT_SLCT))) {
1496                 dev_dbg(adapter->dev, "info: %s: tx aggregation disabled\n",
1497                         __func__);
1498 
1499                 f_send_cur_buf = 1;
1500                 goto tx_curr_single;
1501         }
1502 
1503         if (next_pkt_len) {
1504                 /* More pkt in TX queue */
1505                 dev_dbg(adapter->dev, "info: %s: more packets in queue.\n",
1506                         __func__);
1507 
1508                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1509                         if (!mp_tx_aggr_port_limit_reached(card) &&
1510                             MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len)) {
1511                                 f_precopy_cur_buf = 1;
1512 
1513                                 if (!(card->mp_wr_bitmap &
1514                                       (1 << card->curr_wr_port)) ||
1515                                     !MP_TX_AGGR_BUF_HAS_ROOM(
1516                                             card, pkt_len + next_pkt_len))
1517                                         f_send_aggr_buf = 1;
1518                         } else {
1519                                 /* No room in Aggr buf, send it */
1520                                 f_send_aggr_buf = 1;
1521 
1522                                 if (mp_tx_aggr_port_limit_reached(card) ||
1523                                     !(card->mp_wr_bitmap &
1524                                       (1 << card->curr_wr_port)))
1525                                         f_send_cur_buf = 1;
1526                                 else
1527                                         f_postcopy_cur_buf = 1;
1528                         }
1529                 } else {
1530                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len) &&
1531                             (card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1532                                 f_precopy_cur_buf = 1;
1533                         else
1534                                 f_send_cur_buf = 1;
1535                 }
1536         } else {
1537                 /* Last pkt in TX queue */
1538                 dev_dbg(adapter->dev, "info: %s: Last packet in Tx Queue.\n",
1539                         __func__);
1540 
1541                 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1542                         /* some packs in Aggr buf already */
1543                         f_send_aggr_buf = 1;
1544 
1545                         if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len))
1546                                 f_precopy_cur_buf = 1;
1547                         else
1548                                 /* No room in Aggr buf, send it */
1549                                 f_send_cur_buf = 1;
1550                 } else {
1551                         f_send_cur_buf = 1;
1552                 }
1553         }
1554 
1555         if (f_precopy_cur_buf) {
1556                 dev_dbg(adapter->dev, "data: %s: precopy current buffer\n",
1557                         __func__);
1558                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1559 
1560                 if (MP_TX_AGGR_PKT_LIMIT_REACHED(card) ||
1561                     mp_tx_aggr_port_limit_reached(card))
1562                         /* No more pkts allowed in Aggr buf, send it */
1563                         f_send_aggr_buf = 1;
1564         }
1565 
1566         if (f_send_aggr_buf) {
1567                 dev_dbg(adapter->dev, "data: %s: send aggr buffer: %d %d\n",
1568                         __func__,
1569                                 card->mpa_tx.start_port, card->mpa_tx.ports);
1570                 if (card->supports_sdio_new_mode) {
1571                         u32 port_count;
1572                         int i;
1573 
1574                         for (i = 0, port_count = 0; i < card->max_ports; i++)
1575                                 if (card->mpa_tx.ports & BIT(i))
1576                                         port_count++;
1577 
1578                         /* Writing data from "start_port + 0" to "start_port +
1579                          * port_count -1", so decrease the count by 1
1580                          */
1581                         port_count--;
1582                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1583                                  (port_count << 8)) + card->mpa_tx.start_port;
1584                 } else {
1585                         mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1586                                  (card->mpa_tx.ports << 4)) +
1587                                  card->mpa_tx.start_port;
1588                 }
1589 
1590                 ret = mwifiex_write_data_to_card(adapter, card->mpa_tx.buf,
1591                                                  card->mpa_tx.buf_len, mport);
1592 
1593                 MP_TX_AGGR_BUF_RESET(card);
1594         }
1595 
1596 tx_curr_single:
1597         if (f_send_cur_buf) {
1598                 dev_dbg(adapter->dev, "data: %s: send current buffer %d\n",
1599                         __func__, port);
1600                 ret = mwifiex_write_data_to_card(adapter, payload, pkt_len,
1601                                                  adapter->ioport + port);
1602         }
1603 
1604         if (f_postcopy_cur_buf) {
1605                 dev_dbg(adapter->dev, "data: %s: postcopy current buffer\n",
1606                         __func__);
1607                 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1608         }
1609 
1610         return ret;
1611 }
1612 
1613 /*
1614  * This function downloads data from driver to card.
1615  *
1616  * Both commands and data packets are transferred to the card by this
1617  * function.
1618  *
1619  * This function adds the SDIO specific header to the front of the buffer
1620  * before transferring. The header contains the length of the packet and
1621  * the type. The firmware handles the packets based upon this set type.
1622  */
1623 static int mwifiex_sdio_host_to_card(struct mwifiex_adapter *adapter,
1624                                      u8 type, struct sk_buff *skb,
1625                                      struct mwifiex_tx_param *tx_param)
1626 {
1627         struct sdio_mmc_card *card = adapter->card;
1628         int ret;
1629         u32 buf_block_len;
1630         u32 blk_size;
1631         u32 port = CTRL_PORT;
1632         u8 *payload = (u8 *)skb->data;
1633         u32 pkt_len = skb->len;
1634 
1635         /* Allocate buffer and copy payload */
1636         blk_size = MWIFIEX_SDIO_BLOCK_SIZE;
1637         buf_block_len = (pkt_len + blk_size - 1) / blk_size;
1638         *(__le16 *)&payload[0] = cpu_to_le16((u16)pkt_len);
1639         *(__le16 *)&payload[2] = cpu_to_le16(type);
1640 
1641         /*
1642          * This is SDIO specific header
1643          *  u16 length,
1644          *  u16 type (MWIFIEX_TYPE_DATA = 0, MWIFIEX_TYPE_CMD = 1,
1645          *  MWIFIEX_TYPE_EVENT = 3)
1646          */
1647         if (type == MWIFIEX_TYPE_DATA) {
1648                 ret = mwifiex_get_wr_port_data(adapter, &port);
1649                 if (ret) {
1650                         dev_err(adapter->dev, "%s: no wr_port available\n",
1651                                 __func__);
1652                         return ret;
1653                 }
1654         } else {
1655                 adapter->cmd_sent = true;
1656                 /* Type must be MWIFIEX_TYPE_CMD */
1657 
1658                 if (pkt_len <= INTF_HEADER_LEN ||
1659                     pkt_len > MWIFIEX_UPLD_SIZE)
1660                         dev_err(adapter->dev, "%s: payload=%p, nb=%d\n",
1661                                 __func__, payload, pkt_len);
1662 
1663                 if (card->supports_sdio_new_mode)
1664                         port = CMD_PORT_SLCT;
1665         }
1666 
1667         /* Transfer data to card */
1668         pkt_len = buf_block_len * blk_size;
1669 
1670         if (tx_param)
1671                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1672                                                    port, tx_param->next_pkt_len
1673                                                    );
1674         else
1675                 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1676                                                    port, 0);
1677 
1678         if (ret) {
1679                 if (type == MWIFIEX_TYPE_CMD)
1680                         adapter->cmd_sent = false;
1681                 if (type == MWIFIEX_TYPE_DATA) {
1682                         adapter->data_sent = false;
1683                         /* restore curr_wr_port in error cases */
1684                         card->curr_wr_port = port;
1685                         card->mp_wr_bitmap |= (u32)(1 << card->curr_wr_port);
1686                 }
1687         } else {
1688                 if (type == MWIFIEX_TYPE_DATA) {
1689                         if (!(card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1690                                 adapter->data_sent = true;
1691                         else
1692                                 adapter->data_sent = false;
1693                 }
1694         }
1695 
1696         return ret;
1697 }
1698 
1699 /*
1700  * This function allocates the MPA Tx and Rx buffers.
1701  */
1702 static int mwifiex_alloc_sdio_mpa_buffers(struct mwifiex_adapter *adapter,
1703                                    u32 mpa_tx_buf_size, u32 mpa_rx_buf_size)
1704 {
1705         struct sdio_mmc_card *card = adapter->card;
1706         int ret = 0;
1707 
1708         card->mpa_tx.buf = kzalloc(mpa_tx_buf_size, GFP_KERNEL);
1709         if (!card->mpa_tx.buf) {
1710                 ret = -1;
1711                 goto error;
1712         }
1713 
1714         card->mpa_tx.buf_size = mpa_tx_buf_size;
1715 
1716         card->mpa_rx.buf = kzalloc(mpa_rx_buf_size, GFP_KERNEL);
1717         if (!card->mpa_rx.buf) {
1718                 ret = -1;
1719                 goto error;
1720         }
1721 
1722         card->mpa_rx.buf_size = mpa_rx_buf_size;
1723 
1724 error:
1725         if (ret) {
1726                 kfree(card->mpa_tx.buf);
1727                 kfree(card->mpa_rx.buf);
1728         }
1729 
1730         return ret;
1731 }
1732 
1733 /*
1734  * This function unregisters the SDIO device.
1735  *
1736  * The SDIO IRQ is released, the function is disabled and driver
1737  * data is set to null.
1738  */
1739 static void
1740 mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
1741 {
1742         struct sdio_mmc_card *card = adapter->card;
1743 
1744         if (adapter->card) {
1745                 sdio_claim_host(card->func);
1746                 sdio_disable_func(card->func);
1747                 sdio_release_host(card->func);
1748         }
1749 }
1750 
1751 /*
1752  * This function registers the SDIO device.
1753  *
1754  * SDIO IRQ is claimed, block size is set and driver data is initialized.
1755  */
1756 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
1757 {
1758         int ret;
1759         struct sdio_mmc_card *card = adapter->card;
1760         struct sdio_func *func = card->func;
1761 
1762         /* save adapter pointer in card */
1763         card->adapter = adapter;
1764         adapter->tx_buf_size = card->tx_buf_size;
1765 
1766         sdio_claim_host(func);
1767 
1768         /* Set block size */
1769         ret = sdio_set_block_size(card->func, MWIFIEX_SDIO_BLOCK_SIZE);
1770         sdio_release_host(func);
1771         if (ret) {
1772                 pr_err("cannot set SDIO block size\n");
1773                 return ret;
1774         }
1775 
1776 
1777         adapter->dev = &func->dev;
1778 
1779         strcpy(adapter->fw_name, card->firmware);
1780 
1781         return 0;
1782 }
1783 
1784 /*
1785  * This function initializes the SDIO driver.
1786  *
1787  * The following initializations steps are followed -
1788  *      - Read the Host interrupt status register to acknowledge
1789  *        the first interrupt got from bootloader
1790  *      - Disable host interrupt mask register
1791  *      - Get SDIO port
1792  *      - Initialize SDIO variables in card
1793  *      - Allocate MP registers
1794  *      - Allocate MPA Tx and Rx buffers
1795  */
1796 static int mwifiex_init_sdio(struct mwifiex_adapter *adapter)
1797 {
1798         struct sdio_mmc_card *card = adapter->card;
1799         const struct mwifiex_sdio_card_reg *reg = card->reg;
1800         int ret;
1801         u8 sdio_ireg;
1802 
1803         sdio_set_drvdata(card->func, card);
1804 
1805         /*
1806          * Read the HOST_INT_STATUS_REG for ACK the first interrupt got
1807          * from the bootloader. If we don't do this we get a interrupt
1808          * as soon as we register the irq.
1809          */
1810         mwifiex_read_reg(adapter, HOST_INTSTATUS_REG, &sdio_ireg);
1811 
1812         /* Get SDIO ioport */
1813         mwifiex_init_sdio_ioport(adapter);
1814 
1815         /* Initialize SDIO variables in card */
1816         card->mp_rd_bitmap = 0;
1817         card->mp_wr_bitmap = 0;
1818         card->curr_rd_port = reg->start_rd_port;
1819         card->curr_wr_port = reg->start_wr_port;
1820 
1821         card->mp_data_port_mask = reg->data_port_mask;
1822 
1823         card->mpa_tx.buf_len = 0;
1824         card->mpa_tx.pkt_cnt = 0;
1825         card->mpa_tx.start_port = 0;
1826 
1827         card->mpa_tx.enabled = 1;
1828         card->mpa_tx.pkt_aggr_limit = card->mp_agg_pkt_limit;
1829 
1830         card->mpa_rx.buf_len = 0;
1831         card->mpa_rx.pkt_cnt = 0;
1832         card->mpa_rx.start_port = 0;
1833 
1834         card->mpa_rx.enabled = 1;
1835         card->mpa_rx.pkt_aggr_limit = card->mp_agg_pkt_limit;
1836 
1837         /* Allocate buffers for SDIO MP-A */
1838         card->mp_regs = kzalloc(reg->max_mp_regs, GFP_KERNEL);
1839         if (!card->mp_regs)
1840                 return -ENOMEM;
1841 
1842         /* Allocate skb pointer buffers */
1843         card->mpa_rx.skb_arr = kzalloc((sizeof(void *)) *
1844                                        card->mp_agg_pkt_limit, GFP_KERNEL);
1845         card->mpa_rx.len_arr = kzalloc(sizeof(*card->mpa_rx.len_arr) *
1846                                        card->mp_agg_pkt_limit, GFP_KERNEL);
1847         ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
1848                                              card->mp_tx_agg_buf_size,
1849                                              card->mp_rx_agg_buf_size);
1850         if (ret) {
1851                 dev_err(adapter->dev, "failed to alloc sdio mp-a buffers\n");
1852                 kfree(card->mp_regs);
1853                 return -1;
1854         }
1855 
1856         return ret;
1857 }
1858 
1859 /*
1860  * This function resets the MPA Tx and Rx buffers.
1861  */
1862 static void mwifiex_cleanup_mpa_buf(struct mwifiex_adapter *adapter)
1863 {
1864         struct sdio_mmc_card *card = adapter->card;
1865 
1866         MP_TX_AGGR_BUF_RESET(card);
1867         MP_RX_AGGR_BUF_RESET(card);
1868 }
1869 
1870 /*
1871  * This function cleans up the allocated card buffers.
1872  *
1873  * The following are freed by this function -
1874  *      - MP registers
1875  *      - MPA Tx buffer
1876  *      - MPA Rx buffer
1877  */
1878 static void mwifiex_cleanup_sdio(struct mwifiex_adapter *adapter)
1879 {
1880         struct sdio_mmc_card *card = adapter->card;
1881 
1882         kfree(card->mp_regs);
1883         kfree(card->mpa_rx.skb_arr);
1884         kfree(card->mpa_rx.len_arr);
1885         kfree(card->mpa_tx.buf);
1886         kfree(card->mpa_rx.buf);
1887         sdio_set_drvdata(card->func, NULL);
1888         kfree(card);
1889 }
1890 
1891 /*
1892  * This function updates the MP end port in card.
1893  */
1894 static void
1895 mwifiex_update_mp_end_port(struct mwifiex_adapter *adapter, u16 port)
1896 {
1897         struct sdio_mmc_card *card = adapter->card;
1898         const struct mwifiex_sdio_card_reg *reg = card->reg;
1899         int i;
1900 
1901         card->mp_end_port = port;
1902 
1903         card->mp_data_port_mask = reg->data_port_mask;
1904 
1905         if (reg->start_wr_port) {
1906                 for (i = 1; i <= card->max_ports - card->mp_end_port; i++)
1907                         card->mp_data_port_mask &=
1908                                         ~(1 << (card->max_ports - i));
1909         }
1910 
1911         card->curr_wr_port = reg->start_wr_port;
1912 
1913         dev_dbg(adapter->dev, "cmd: mp_end_port %d, data port mask 0x%x\n",
1914                 port, card->mp_data_port_mask);
1915 }
1916 
1917 static struct mmc_host *reset_host;
1918 static void sdio_card_reset_worker(struct work_struct *work)
1919 {
1920         struct mmc_host *target = reset_host;
1921 
1922         /* The actual reset operation must be run outside of driver thread.
1923          * This is because mmc_remove_host() will cause the device to be
1924          * instantly destroyed, and the driver then needs to end its thread,
1925          * leading to a deadlock.
1926          *
1927          * We run it in a totally independent workqueue.
1928          */
1929 
1930         pr_err("Resetting card...\n");
1931         mmc_remove_host(target);
1932         /* 20ms delay is based on experiment with sdhci controller */
1933         mdelay(20);
1934         mmc_add_host(target);
1935 }
1936 static DECLARE_WORK(card_reset_work, sdio_card_reset_worker);
1937 
1938 /* This function resets the card */
1939 static void mwifiex_sdio_card_reset(struct mwifiex_adapter *adapter)
1940 {
1941         struct sdio_mmc_card *card = adapter->card;
1942 
1943         reset_host = card->func->card->host;
1944         schedule_work(&card_reset_work);
1945 }
1946 
1947 static struct mwifiex_if_ops sdio_ops = {
1948         .init_if = mwifiex_init_sdio,
1949         .cleanup_if = mwifiex_cleanup_sdio,
1950         .check_fw_status = mwifiex_check_fw_status,
1951         .prog_fw = mwifiex_prog_fw_w_helper,
1952         .register_dev = mwifiex_register_dev,
1953         .unregister_dev = mwifiex_unregister_dev,
1954         .enable_int = mwifiex_sdio_enable_host_int,
1955         .disable_int = mwifiex_sdio_disable_host_int,
1956         .process_int_status = mwifiex_process_int_status,
1957         .host_to_card = mwifiex_sdio_host_to_card,
1958         .wakeup = mwifiex_pm_wakeup_card,
1959         .wakeup_complete = mwifiex_pm_wakeup_card_complete,
1960 
1961         /* SDIO specific */
1962         .update_mp_end_port = mwifiex_update_mp_end_port,
1963         .cleanup_mpa_buf = mwifiex_cleanup_mpa_buf,
1964         .cmdrsp_complete = mwifiex_sdio_cmdrsp_complete,
1965         .event_complete = mwifiex_sdio_event_complete,
1966         .card_reset = mwifiex_sdio_card_reset,
1967 };
1968 
1969 /*
1970  * This function initializes the SDIO driver.
1971  *
1972  * This initiates the semaphore and registers the device with
1973  * SDIO bus.
1974  */
1975 static int
1976 mwifiex_sdio_init_module(void)
1977 {
1978         sema_init(&add_remove_card_sem, 1);
1979 
1980         /* Clear the flag in case user removes the card. */
1981         user_rmmod = 0;
1982 
1983         return sdio_register_driver(&mwifiex_sdio);
1984 }
1985 
1986 /*
1987  * This function cleans up the SDIO driver.
1988  *
1989  * The following major steps are followed for cleanup -
1990  *      - Resume the device if its suspended
1991  *      - Disconnect the device if connected
1992  *      - Shutdown the firmware
1993  *      - Unregister the device from SDIO bus.
1994  */
1995 static void
1996 mwifiex_sdio_cleanup_module(void)
1997 {
1998         if (!down_interruptible(&add_remove_card_sem))
1999                 up(&add_remove_card_sem);
2000 
2001         /* Set the flag as user is removing this module. */
2002         user_rmmod = 1;
2003 
2004         cancel_work_sync(&card_reset_work);
2005         sdio_unregister_driver(&mwifiex_sdio);
2006 }
2007 
2008 module_init(mwifiex_sdio_init_module);
2009 module_exit(mwifiex_sdio_cleanup_module);
2010 
2011 MODULE_AUTHOR("Marvell International Ltd.");
2012 MODULE_DESCRIPTION("Marvell WiFi-Ex SDIO Driver version " SDIO_VERSION);
2013 MODULE_VERSION(SDIO_VERSION);
2014 MODULE_LICENSE("GPL v2");
2015 MODULE_FIRMWARE(SD8786_DEFAULT_FW_NAME);
2016 MODULE_FIRMWARE(SD8787_DEFAULT_FW_NAME);
2017 MODULE_FIRMWARE(SD8797_DEFAULT_FW_NAME);
2018 MODULE_FIRMWARE(SD8897_DEFAULT_FW_NAME);
2019 

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