Version:  2.0.40 2.2.26 2.4.37 3.5 3.6 3.7 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

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

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us