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Merge remote-tracking branch 'asoc/fix/max98357a' into asoc-linus
[deliverable/linux.git] / 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
51 static struct semaphore add_remove_card_sem;
52
53 static struct memory_type_mapping mem_type_mapping_tbl[] = {
54 {"ITCM", NULL, 0, 0xF0},
55 {"DTCM", NULL, 0, 0xF1},
56 {"SQRAM", NULL, 0, 0xF2},
57 {"APU", NULL, 0, 0xF3},
58 {"CIU", NULL, 0, 0xF4},
59 {"ICU", NULL, 0, 0xF5},
60 {"MAC", NULL, 0, 0xF6},
61 {"EXT7", NULL, 0, 0xF7},
62 {"EXT8", NULL, 0, 0xF8},
63 {"EXT9", NULL, 0, 0xF9},
64 {"EXT10", NULL, 0, 0xFA},
65 {"EXT11", NULL, 0, 0xFB},
66 {"EXT12", NULL, 0, 0xFC},
67 {"EXT13", NULL, 0, 0xFD},
68 {"EXTLAST", NULL, 0, 0xFE},
69 };
70
71 /*
72 * SDIO probe.
73 *
74 * This function probes an mwifiex device and registers it. It allocates
75 * the card structure, enables SDIO function number and initiates the
76 * device registration and initialization procedure by adding a logical
77 * interface.
78 */
79 static int
80 mwifiex_sdio_probe(struct sdio_func *func, const struct sdio_device_id *id)
81 {
82 int ret;
83 struct sdio_mmc_card *card = NULL;
84
85 pr_debug("info: vendor=0x%4.04X device=0x%4.04X class=%d function=%d\n",
86 func->vendor, func->device, func->class, func->num);
87
88 card = kzalloc(sizeof(struct sdio_mmc_card), GFP_KERNEL);
89 if (!card)
90 return -ENOMEM;
91
92 card->func = func;
93
94 func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
95
96 if (id->driver_data) {
97 struct mwifiex_sdio_device *data = (void *)id->driver_data;
98
99 card->firmware = data->firmware;
100 card->reg = data->reg;
101 card->max_ports = data->max_ports;
102 card->mp_agg_pkt_limit = data->mp_agg_pkt_limit;
103 card->supports_sdio_new_mode = data->supports_sdio_new_mode;
104 card->has_control_mask = data->has_control_mask;
105 card->tx_buf_size = data->tx_buf_size;
106 card->mp_tx_agg_buf_size = data->mp_tx_agg_buf_size;
107 card->mp_rx_agg_buf_size = data->mp_rx_agg_buf_size;
108 card->supports_fw_dump = data->supports_fw_dump;
109 card->auto_tdls = data->auto_tdls;
110 card->can_ext_scan = data->can_ext_scan;
111 }
112
113 sdio_claim_host(func);
114 ret = sdio_enable_func(func);
115 sdio_release_host(func);
116
117 if (ret) {
118 pr_err("%s: failed to enable function\n", __func__);
119 kfree(card);
120 return -EIO;
121 }
122
123 if (mwifiex_add_card(card, &add_remove_card_sem, &sdio_ops,
124 MWIFIEX_SDIO)) {
125 pr_err("%s: add card failed\n", __func__);
126 kfree(card);
127 sdio_claim_host(func);
128 ret = sdio_disable_func(func);
129 sdio_release_host(func);
130 ret = -1;
131 }
132
133 return ret;
134 }
135
136 /*
137 * SDIO resume.
138 *
139 * Kernel needs to suspend all functions separately. Therefore all
140 * registered functions must have drivers with suspend and resume
141 * methods. Failing that the kernel simply removes the whole card.
142 *
143 * If already not resumed, this function turns on the traffic and
144 * sends a host sleep cancel request to the firmware.
145 */
146 static int mwifiex_sdio_resume(struct device *dev)
147 {
148 struct sdio_func *func = dev_to_sdio_func(dev);
149 struct sdio_mmc_card *card;
150 struct mwifiex_adapter *adapter;
151 mmc_pm_flag_t pm_flag = 0;
152
153 if (func) {
154 pm_flag = sdio_get_host_pm_caps(func);
155 card = sdio_get_drvdata(func);
156 if (!card || !card->adapter) {
157 pr_err("resume: invalid card or adapter\n");
158 return 0;
159 }
160 } else {
161 pr_err("resume: sdio_func is not specified\n");
162 return 0;
163 }
164
165 adapter = card->adapter;
166
167 if (!adapter->is_suspended) {
168 dev_warn(adapter->dev, "device already resumed\n");
169 return 0;
170 }
171
172 adapter->is_suspended = false;
173
174 /* Disable Host Sleep */
175 mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
176 MWIFIEX_ASYNC_CMD);
177
178 return 0;
179 }
180
181 /*
182 * SDIO remove.
183 *
184 * This function removes the interface and frees up the card structure.
185 */
186 static void
187 mwifiex_sdio_remove(struct sdio_func *func)
188 {
189 struct sdio_mmc_card *card;
190 struct mwifiex_adapter *adapter;
191 struct mwifiex_private *priv;
192
193 pr_debug("info: SDIO func num=%d\n", func->num);
194
195 card = sdio_get_drvdata(func);
196 if (!card)
197 return;
198
199 adapter = card->adapter;
200 if (!adapter || !adapter->priv_num)
201 return;
202
203 cancel_work_sync(&adapter->iface_work);
204
205 if (user_rmmod) {
206 if (adapter->is_suspended)
207 mwifiex_sdio_resume(adapter->dev);
208
209 mwifiex_deauthenticate_all(adapter);
210
211 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
212 mwifiex_disable_auto_ds(priv);
213 mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
214 }
215
216 mwifiex_remove_card(card->adapter, &add_remove_card_sem);
217 }
218
219 /*
220 * SDIO suspend.
221 *
222 * Kernel needs to suspend all functions separately. Therefore all
223 * registered functions must have drivers with suspend and resume
224 * methods. Failing that the kernel simply removes the whole card.
225 *
226 * If already not suspended, this function allocates and sends a host
227 * sleep activate request to the firmware and turns off the traffic.
228 */
229 static int mwifiex_sdio_suspend(struct device *dev)
230 {
231 struct sdio_func *func = dev_to_sdio_func(dev);
232 struct sdio_mmc_card *card;
233 struct mwifiex_adapter *adapter;
234 mmc_pm_flag_t pm_flag = 0;
235 int ret = 0;
236
237 if (func) {
238 pm_flag = sdio_get_host_pm_caps(func);
239 pr_debug("cmd: %s: suspend: PM flag = 0x%x\n",
240 sdio_func_id(func), pm_flag);
241 if (!(pm_flag & MMC_PM_KEEP_POWER)) {
242 pr_err("%s: cannot remain alive while host is"
243 " suspended\n", sdio_func_id(func));
244 return -ENOSYS;
245 }
246
247 card = sdio_get_drvdata(func);
248 if (!card || !card->adapter) {
249 pr_err("suspend: invalid card or adapter\n");
250 return 0;
251 }
252 } else {
253 pr_err("suspend: sdio_func is not specified\n");
254 return 0;
255 }
256
257 adapter = card->adapter;
258
259 /* Enable the Host Sleep */
260 if (!mwifiex_enable_hs(adapter)) {
261 dev_err(adapter->dev, "cmd: failed to suspend\n");
262 adapter->hs_enabling = false;
263 return -EFAULT;
264 }
265
266 dev_dbg(adapter->dev, "cmd: suspend with MMC_PM_KEEP_POWER\n");
267 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
268
269 /* Indicate device suspended */
270 adapter->is_suspended = true;
271 adapter->hs_enabling = false;
272
273 return ret;
274 }
275
276 /* Device ID for SD8786 */
277 #define SDIO_DEVICE_ID_MARVELL_8786 (0x9116)
278 /* Device ID for SD8787 */
279 #define SDIO_DEVICE_ID_MARVELL_8787 (0x9119)
280 /* Device ID for SD8797 */
281 #define SDIO_DEVICE_ID_MARVELL_8797 (0x9129)
282 /* Device ID for SD8897 */
283 #define SDIO_DEVICE_ID_MARVELL_8897 (0x912d)
284 /* Device ID for SD8887 */
285 #define SDIO_DEVICE_ID_MARVELL_8887 (0x9135)
286 /* Device ID for SD8801 */
287 #define SDIO_DEVICE_ID_MARVELL_8801 (0x9139)
288
289
290 /* WLAN IDs */
291 static const struct sdio_device_id mwifiex_ids[] = {
292 {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8786),
293 .driver_data = (unsigned long) &mwifiex_sdio_sd8786},
294 {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8787),
295 .driver_data = (unsigned long) &mwifiex_sdio_sd8787},
296 {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797),
297 .driver_data = (unsigned long) &mwifiex_sdio_sd8797},
298 {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8897),
299 .driver_data = (unsigned long) &mwifiex_sdio_sd8897},
300 {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8887),
301 .driver_data = (unsigned long)&mwifiex_sdio_sd8887},
302 {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8801),
303 .driver_data = (unsigned long)&mwifiex_sdio_sd8801},
304 {},
305 };
306
307 MODULE_DEVICE_TABLE(sdio, mwifiex_ids);
308
309 static const struct dev_pm_ops mwifiex_sdio_pm_ops = {
310 .suspend = mwifiex_sdio_suspend,
311 .resume = mwifiex_sdio_resume,
312 };
313
314 static struct sdio_driver mwifiex_sdio = {
315 .name = "mwifiex_sdio",
316 .id_table = mwifiex_ids,
317 .probe = mwifiex_sdio_probe,
318 .remove = mwifiex_sdio_remove,
319 .drv = {
320 .owner = THIS_MODULE,
321 .pm = &mwifiex_sdio_pm_ops,
322 }
323 };
324
325 /* Write data into SDIO card register. Caller claims SDIO device. */
326 static int
327 mwifiex_write_reg_locked(struct sdio_func *func, u32 reg, u8 data)
328 {
329 int ret = -1;
330 sdio_writeb(func, data, reg, &ret);
331 return ret;
332 }
333
334 /*
335 * This function writes data into SDIO card register.
336 */
337 static int
338 mwifiex_write_reg(struct mwifiex_adapter *adapter, u32 reg, u8 data)
339 {
340 struct sdio_mmc_card *card = adapter->card;
341 int ret;
342
343 sdio_claim_host(card->func);
344 ret = mwifiex_write_reg_locked(card->func, reg, data);
345 sdio_release_host(card->func);
346
347 return ret;
348 }
349
350 /*
351 * This function reads data from SDIO card register.
352 */
353 static int
354 mwifiex_read_reg(struct mwifiex_adapter *adapter, u32 reg, u8 *data)
355 {
356 struct sdio_mmc_card *card = adapter->card;
357 int ret = -1;
358 u8 val;
359
360 sdio_claim_host(card->func);
361 val = sdio_readb(card->func, reg, &ret);
362 sdio_release_host(card->func);
363
364 *data = val;
365
366 return ret;
367 }
368
369 /*
370 * This function writes multiple data into SDIO card memory.
371 *
372 * This does not work in suspended mode.
373 */
374 static int
375 mwifiex_write_data_sync(struct mwifiex_adapter *adapter,
376 u8 *buffer, u32 pkt_len, u32 port)
377 {
378 struct sdio_mmc_card *card = adapter->card;
379 int ret;
380 u8 blk_mode =
381 (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE : BLOCK_MODE;
382 u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
383 u32 blk_cnt =
384 (blk_mode ==
385 BLOCK_MODE) ? (pkt_len /
386 MWIFIEX_SDIO_BLOCK_SIZE) : pkt_len;
387 u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
388
389 if (adapter->is_suspended) {
390 dev_err(adapter->dev,
391 "%s: not allowed while suspended\n", __func__);
392 return -1;
393 }
394
395 sdio_claim_host(card->func);
396
397 ret = sdio_writesb(card->func, ioport, buffer, blk_cnt * blk_size);
398
399 sdio_release_host(card->func);
400
401 return ret;
402 }
403
404 /*
405 * This function reads multiple data from SDIO card memory.
406 */
407 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *buffer,
408 u32 len, u32 port, u8 claim)
409 {
410 struct sdio_mmc_card *card = adapter->card;
411 int ret;
412 u8 blk_mode = (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE
413 : BLOCK_MODE;
414 u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
415 u32 blk_cnt = (blk_mode == BLOCK_MODE) ? (len / MWIFIEX_SDIO_BLOCK_SIZE)
416 : len;
417 u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
418
419 if (claim)
420 sdio_claim_host(card->func);
421
422 ret = sdio_readsb(card->func, buffer, ioport, blk_cnt * blk_size);
423
424 if (claim)
425 sdio_release_host(card->func);
426
427 return ret;
428 }
429
430 /*
431 * This function wakes up the card.
432 *
433 * A host power up command is written to the card configuration
434 * register to wake up the card.
435 */
436 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
437 {
438 dev_dbg(adapter->dev, "event: wakeup device...\n");
439
440 return mwifiex_write_reg(adapter, CONFIGURATION_REG, HOST_POWER_UP);
441 }
442
443 /*
444 * This function is called after the card has woken up.
445 *
446 * The card configuration register is reset.
447 */
448 static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
449 {
450 dev_dbg(adapter->dev, "cmd: wakeup device completed\n");
451
452 return mwifiex_write_reg(adapter, CONFIGURATION_REG, 0);
453 }
454
455 /*
456 * This function is used to initialize IO ports for the
457 * chipsets supporting SDIO new mode eg SD8897.
458 */
459 static int mwifiex_init_sdio_new_mode(struct mwifiex_adapter *adapter)
460 {
461 u8 reg;
462 struct sdio_mmc_card *card = adapter->card;
463
464 adapter->ioport = MEM_PORT;
465
466 /* enable sdio new mode */
467 if (mwifiex_read_reg(adapter, card->reg->card_cfg_2_1_reg, &reg))
468 return -1;
469 if (mwifiex_write_reg(adapter, card->reg->card_cfg_2_1_reg,
470 reg | CMD53_NEW_MODE))
471 return -1;
472
473 /* Configure cmd port and enable reading rx length from the register */
474 if (mwifiex_read_reg(adapter, card->reg->cmd_cfg_0, &reg))
475 return -1;
476 if (mwifiex_write_reg(adapter, card->reg->cmd_cfg_0,
477 reg | CMD_PORT_RD_LEN_EN))
478 return -1;
479
480 /* Enable Dnld/Upld ready auto reset for cmd port after cmd53 is
481 * completed
482 */
483 if (mwifiex_read_reg(adapter, card->reg->cmd_cfg_1, &reg))
484 return -1;
485 if (mwifiex_write_reg(adapter, card->reg->cmd_cfg_1,
486 reg | CMD_PORT_AUTO_EN))
487 return -1;
488
489 return 0;
490 }
491
492 /* This function initializes the IO ports.
493 *
494 * The following operations are performed -
495 * - Read the IO ports (0, 1 and 2)
496 * - Set host interrupt Reset-To-Read to clear
497 * - Set auto re-enable interrupt
498 */
499 static int mwifiex_init_sdio_ioport(struct mwifiex_adapter *adapter)
500 {
501 u8 reg;
502 struct sdio_mmc_card *card = adapter->card;
503
504 adapter->ioport = 0;
505
506 if (card->supports_sdio_new_mode) {
507 if (mwifiex_init_sdio_new_mode(adapter))
508 return -1;
509 goto cont;
510 }
511
512 /* Read the IO port */
513 if (!mwifiex_read_reg(adapter, card->reg->io_port_0_reg, &reg))
514 adapter->ioport |= (reg & 0xff);
515 else
516 return -1;
517
518 if (!mwifiex_read_reg(adapter, card->reg->io_port_1_reg, &reg))
519 adapter->ioport |= ((reg & 0xff) << 8);
520 else
521 return -1;
522
523 if (!mwifiex_read_reg(adapter, card->reg->io_port_2_reg, &reg))
524 adapter->ioport |= ((reg & 0xff) << 16);
525 else
526 return -1;
527 cont:
528 pr_debug("info: SDIO FUNC1 IO port: %#x\n", adapter->ioport);
529
530 /* Set Host interrupt reset to read to clear */
531 if (!mwifiex_read_reg(adapter, card->reg->host_int_rsr_reg, &reg))
532 mwifiex_write_reg(adapter, card->reg->host_int_rsr_reg,
533 reg | card->reg->sdio_int_mask);
534 else
535 return -1;
536
537 /* Dnld/Upld ready set to auto reset */
538 if (!mwifiex_read_reg(adapter, card->reg->card_misc_cfg_reg, &reg))
539 mwifiex_write_reg(adapter, card->reg->card_misc_cfg_reg,
540 reg | AUTO_RE_ENABLE_INT);
541 else
542 return -1;
543
544 return 0;
545 }
546
547 /*
548 * This function sends data to the card.
549 */
550 static int mwifiex_write_data_to_card(struct mwifiex_adapter *adapter,
551 u8 *payload, u32 pkt_len, u32 port)
552 {
553 u32 i = 0;
554 int ret;
555
556 do {
557 ret = mwifiex_write_data_sync(adapter, payload, pkt_len, port);
558 if (ret) {
559 i++;
560 dev_err(adapter->dev, "host_to_card, write iomem"
561 " (%d) failed: %d\n", i, ret);
562 if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
563 dev_err(adapter->dev, "write CFG reg failed\n");
564
565 ret = -1;
566 if (i > MAX_WRITE_IOMEM_RETRY)
567 return ret;
568 }
569 } while (ret == -1);
570
571 return ret;
572 }
573
574 /*
575 * This function gets the read port.
576 *
577 * If control port bit is set in MP read bitmap, the control port
578 * is returned, otherwise the current read port is returned and
579 * the value is increased (provided it does not reach the maximum
580 * limit, in which case it is reset to 1)
581 */
582 static int mwifiex_get_rd_port(struct mwifiex_adapter *adapter, u8 *port)
583 {
584 struct sdio_mmc_card *card = adapter->card;
585 const struct mwifiex_sdio_card_reg *reg = card->reg;
586 u32 rd_bitmap = card->mp_rd_bitmap;
587
588 dev_dbg(adapter->dev, "data: mp_rd_bitmap=0x%08x\n", rd_bitmap);
589
590 if (card->supports_sdio_new_mode) {
591 if (!(rd_bitmap & reg->data_port_mask))
592 return -1;
593 } else {
594 if (!(rd_bitmap & (CTRL_PORT_MASK | reg->data_port_mask)))
595 return -1;
596 }
597
598 if ((card->has_control_mask) &&
599 (card->mp_rd_bitmap & CTRL_PORT_MASK)) {
600 card->mp_rd_bitmap &= (u32) (~CTRL_PORT_MASK);
601 *port = CTRL_PORT;
602 dev_dbg(adapter->dev, "data: port=%d mp_rd_bitmap=0x%08x\n",
603 *port, card->mp_rd_bitmap);
604 return 0;
605 }
606
607 if (!(card->mp_rd_bitmap & (1 << card->curr_rd_port)))
608 return -1;
609
610 /* We are now handling the SDIO data ports */
611 card->mp_rd_bitmap &= (u32)(~(1 << card->curr_rd_port));
612 *port = card->curr_rd_port;
613
614 if (++card->curr_rd_port == card->max_ports)
615 card->curr_rd_port = reg->start_rd_port;
616
617 dev_dbg(adapter->dev,
618 "data: port=%d mp_rd_bitmap=0x%08x -> 0x%08x\n",
619 *port, rd_bitmap, card->mp_rd_bitmap);
620
621 return 0;
622 }
623
624 /*
625 * This function gets the write port for data.
626 *
627 * The current write port is returned if available and the value is
628 * increased (provided it does not reach the maximum limit, in which
629 * case it is reset to 1)
630 */
631 static int mwifiex_get_wr_port_data(struct mwifiex_adapter *adapter, u32 *port)
632 {
633 struct sdio_mmc_card *card = adapter->card;
634 const struct mwifiex_sdio_card_reg *reg = card->reg;
635 u32 wr_bitmap = card->mp_wr_bitmap;
636
637 dev_dbg(adapter->dev, "data: mp_wr_bitmap=0x%08x\n", wr_bitmap);
638
639 if (!(wr_bitmap & card->mp_data_port_mask)) {
640 adapter->data_sent = true;
641 return -EBUSY;
642 }
643
644 if (card->mp_wr_bitmap & (1 << card->curr_wr_port)) {
645 card->mp_wr_bitmap &= (u32) (~(1 << card->curr_wr_port));
646 *port = card->curr_wr_port;
647 if (++card->curr_wr_port == card->mp_end_port)
648 card->curr_wr_port = reg->start_wr_port;
649 } else {
650 adapter->data_sent = true;
651 return -EBUSY;
652 }
653
654 if ((card->has_control_mask) && (*port == CTRL_PORT)) {
655 dev_err(adapter->dev,
656 "invalid data port=%d cur port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
657 *port, card->curr_wr_port, wr_bitmap,
658 card->mp_wr_bitmap);
659 return -1;
660 }
661
662 dev_dbg(adapter->dev, "data: port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
663 *port, wr_bitmap, card->mp_wr_bitmap);
664
665 return 0;
666 }
667
668 /*
669 * This function polls the card status.
670 */
671 static int
672 mwifiex_sdio_poll_card_status(struct mwifiex_adapter *adapter, u8 bits)
673 {
674 struct sdio_mmc_card *card = adapter->card;
675 u32 tries;
676 u8 cs;
677
678 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
679 if (mwifiex_read_reg(adapter, card->reg->poll_reg, &cs))
680 break;
681 else if ((cs & bits) == bits)
682 return 0;
683
684 usleep_range(10, 20);
685 }
686
687 dev_err(adapter->dev, "poll card status failed, tries = %d\n", tries);
688
689 return -1;
690 }
691
692 /*
693 * This function reads the firmware status.
694 */
695 static int
696 mwifiex_sdio_read_fw_status(struct mwifiex_adapter *adapter, u16 *dat)
697 {
698 struct sdio_mmc_card *card = adapter->card;
699 const struct mwifiex_sdio_card_reg *reg = card->reg;
700 u8 fws0, fws1;
701
702 if (mwifiex_read_reg(adapter, reg->status_reg_0, &fws0))
703 return -1;
704
705 if (mwifiex_read_reg(adapter, reg->status_reg_1, &fws1))
706 return -1;
707
708 *dat = (u16) ((fws1 << 8) | fws0);
709
710 return 0;
711 }
712
713 /*
714 * This function disables the host interrupt.
715 *
716 * The host interrupt mask is read, the disable bit is reset and
717 * written back to the card host interrupt mask register.
718 */
719 static void mwifiex_sdio_disable_host_int(struct mwifiex_adapter *adapter)
720 {
721 struct sdio_mmc_card *card = adapter->card;
722 struct sdio_func *func = card->func;
723
724 sdio_claim_host(func);
725 mwifiex_write_reg_locked(func, card->reg->host_int_mask_reg, 0);
726 sdio_release_irq(func);
727 sdio_release_host(func);
728 }
729
730 /*
731 * This function reads the interrupt status from card.
732 */
733 static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter)
734 {
735 struct sdio_mmc_card *card = adapter->card;
736 u8 sdio_ireg;
737 unsigned long flags;
738
739 if (mwifiex_read_data_sync(adapter, card->mp_regs,
740 card->reg->max_mp_regs,
741 REG_PORT | MWIFIEX_SDIO_BYTE_MODE_MASK, 0)) {
742 dev_err(adapter->dev, "read mp_regs failed\n");
743 return;
744 }
745
746 sdio_ireg = card->mp_regs[card->reg->host_int_status_reg];
747 if (sdio_ireg) {
748 /*
749 * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
750 * For SDIO new mode CMD port interrupts
751 * DN_LD_CMD_PORT_HOST_INT_STATUS and/or
752 * UP_LD_CMD_PORT_HOST_INT_STATUS
753 * Clear the interrupt status register
754 */
755 dev_dbg(adapter->dev, "int: sdio_ireg = %#x\n", sdio_ireg);
756 spin_lock_irqsave(&adapter->int_lock, flags);
757 adapter->int_status |= sdio_ireg;
758 spin_unlock_irqrestore(&adapter->int_lock, flags);
759 }
760 }
761
762 /*
763 * SDIO interrupt handler.
764 *
765 * This function reads the interrupt status from firmware and handles
766 * the interrupt in current thread (ksdioirqd) right away.
767 */
768 static void
769 mwifiex_sdio_interrupt(struct sdio_func *func)
770 {
771 struct mwifiex_adapter *adapter;
772 struct sdio_mmc_card *card;
773
774 card = sdio_get_drvdata(func);
775 if (!card || !card->adapter) {
776 pr_debug("int: func=%p card=%p adapter=%p\n",
777 func, card, card ? card->adapter : NULL);
778 return;
779 }
780 adapter = card->adapter;
781
782 if (!adapter->pps_uapsd_mode && adapter->ps_state == PS_STATE_SLEEP)
783 adapter->ps_state = PS_STATE_AWAKE;
784
785 mwifiex_interrupt_status(adapter);
786 mwifiex_main_process(adapter);
787 }
788
789 /*
790 * This function enables the host interrupt.
791 *
792 * The host interrupt enable mask is written to the card
793 * host interrupt mask register.
794 */
795 static int mwifiex_sdio_enable_host_int(struct mwifiex_adapter *adapter)
796 {
797 struct sdio_mmc_card *card = adapter->card;
798 struct sdio_func *func = card->func;
799 int ret;
800
801 sdio_claim_host(func);
802
803 /* Request the SDIO IRQ */
804 ret = sdio_claim_irq(func, mwifiex_sdio_interrupt);
805 if (ret) {
806 dev_err(adapter->dev, "claim irq failed: ret=%d\n", ret);
807 goto out;
808 }
809
810 /* Simply write the mask to the register */
811 ret = mwifiex_write_reg_locked(func, card->reg->host_int_mask_reg,
812 card->reg->host_int_enable);
813 if (ret) {
814 dev_err(adapter->dev, "enable host interrupt failed\n");
815 sdio_release_irq(func);
816 }
817
818 out:
819 sdio_release_host(func);
820 return ret;
821 }
822
823 /*
824 * This function sends a data buffer to the card.
825 */
826 static int mwifiex_sdio_card_to_host(struct mwifiex_adapter *adapter,
827 u32 *type, u8 *buffer,
828 u32 npayload, u32 ioport)
829 {
830 int ret;
831 u32 nb;
832
833 if (!buffer) {
834 dev_err(adapter->dev, "%s: buffer is NULL\n", __func__);
835 return -1;
836 }
837
838 ret = mwifiex_read_data_sync(adapter, buffer, npayload, ioport, 1);
839
840 if (ret) {
841 dev_err(adapter->dev, "%s: read iomem failed: %d\n", __func__,
842 ret);
843 return -1;
844 }
845
846 nb = le16_to_cpu(*(__le16 *) (buffer));
847 if (nb > npayload) {
848 dev_err(adapter->dev, "%s: invalid packet, nb=%d npayload=%d\n",
849 __func__, nb, npayload);
850 return -1;
851 }
852
853 *type = le16_to_cpu(*(__le16 *) (buffer + 2));
854
855 return ret;
856 }
857
858 /*
859 * This function downloads the firmware to the card.
860 *
861 * Firmware is downloaded to the card in blocks. Every block download
862 * is tested for CRC errors, and retried a number of times before
863 * returning failure.
864 */
865 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
866 struct mwifiex_fw_image *fw)
867 {
868 struct sdio_mmc_card *card = adapter->card;
869 const struct mwifiex_sdio_card_reg *reg = card->reg;
870 int ret;
871 u8 *firmware = fw->fw_buf;
872 u32 firmware_len = fw->fw_len;
873 u32 offset = 0;
874 u8 base0, base1;
875 u8 *fwbuf;
876 u16 len = 0;
877 u32 txlen, tx_blocks = 0, tries;
878 u32 i = 0;
879
880 if (!firmware_len) {
881 dev_err(adapter->dev,
882 "firmware image not found! Terminating download\n");
883 return -1;
884 }
885
886 dev_dbg(adapter->dev, "info: downloading FW image (%d bytes)\n",
887 firmware_len);
888
889 /* Assume that the allocated buffer is 8-byte aligned */
890 fwbuf = kzalloc(MWIFIEX_UPLD_SIZE, GFP_KERNEL);
891 if (!fwbuf)
892 return -ENOMEM;
893
894 /* Perform firmware data transfer */
895 do {
896 /* The host polls for the DN_LD_CARD_RDY and CARD_IO_READY
897 bits */
898 ret = mwifiex_sdio_poll_card_status(adapter, CARD_IO_READY |
899 DN_LD_CARD_RDY);
900 if (ret) {
901 dev_err(adapter->dev, "FW download with helper:"
902 " poll status timeout @ %d\n", offset);
903 goto done;
904 }
905
906 /* More data? */
907 if (offset >= firmware_len)
908 break;
909
910 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
911 ret = mwifiex_read_reg(adapter, reg->base_0_reg,
912 &base0);
913 if (ret) {
914 dev_err(adapter->dev,
915 "dev BASE0 register read failed: "
916 "base0=%#04X(%d). Terminating dnld\n",
917 base0, base0);
918 goto done;
919 }
920 ret = mwifiex_read_reg(adapter, reg->base_1_reg,
921 &base1);
922 if (ret) {
923 dev_err(adapter->dev,
924 "dev BASE1 register read failed: "
925 "base1=%#04X(%d). Terminating dnld\n",
926 base1, base1);
927 goto done;
928 }
929 len = (u16) (((base1 & 0xff) << 8) | (base0 & 0xff));
930
931 if (len)
932 break;
933
934 usleep_range(10, 20);
935 }
936
937 if (!len) {
938 break;
939 } else if (len > MWIFIEX_UPLD_SIZE) {
940 dev_err(adapter->dev,
941 "FW dnld failed @ %d, invalid length %d\n",
942 offset, len);
943 ret = -1;
944 goto done;
945 }
946
947 txlen = len;
948
949 if (len & BIT(0)) {
950 i++;
951 if (i > MAX_WRITE_IOMEM_RETRY) {
952 dev_err(adapter->dev,
953 "FW dnld failed @ %d, over max retry\n",
954 offset);
955 ret = -1;
956 goto done;
957 }
958 dev_err(adapter->dev, "CRC indicated by the helper:"
959 " len = 0x%04X, txlen = %d\n", len, txlen);
960 len &= ~BIT(0);
961 /* Setting this to 0 to resend from same offset */
962 txlen = 0;
963 } else {
964 i = 0;
965
966 /* Set blocksize to transfer - checking for last
967 block */
968 if (firmware_len - offset < txlen)
969 txlen = firmware_len - offset;
970
971 tx_blocks = (txlen + MWIFIEX_SDIO_BLOCK_SIZE - 1)
972 / MWIFIEX_SDIO_BLOCK_SIZE;
973
974 /* Copy payload to buffer */
975 memmove(fwbuf, &firmware[offset], txlen);
976 }
977
978 ret = mwifiex_write_data_sync(adapter, fwbuf, tx_blocks *
979 MWIFIEX_SDIO_BLOCK_SIZE,
980 adapter->ioport);
981 if (ret) {
982 dev_err(adapter->dev,
983 "FW download, write iomem (%d) failed @ %d\n",
984 i, offset);
985 if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
986 dev_err(adapter->dev, "write CFG reg failed\n");
987
988 ret = -1;
989 goto done;
990 }
991
992 offset += txlen;
993 } while (true);
994
995 dev_notice(adapter->dev,
996 "info: FW download over, size %d bytes\n", offset);
997
998 ret = 0;
999 done:
1000 kfree(fwbuf);
1001 return ret;
1002 }
1003
1004 /*
1005 * This function checks the firmware status in card.
1006 *
1007 * The winner interface is also determined by this function.
1008 */
1009 static int mwifiex_check_fw_status(struct mwifiex_adapter *adapter,
1010 u32 poll_num)
1011 {
1012 struct sdio_mmc_card *card = adapter->card;
1013 int ret = 0;
1014 u16 firmware_stat;
1015 u32 tries;
1016 u8 winner_status;
1017
1018 /* Wait for firmware initialization event */
1019 for (tries = 0; tries < poll_num; tries++) {
1020 ret = mwifiex_sdio_read_fw_status(adapter, &firmware_stat);
1021 if (ret)
1022 continue;
1023 if (firmware_stat == FIRMWARE_READY_SDIO) {
1024 ret = 0;
1025 break;
1026 } else {
1027 msleep(100);
1028 ret = -1;
1029 }
1030 }
1031
1032 if (ret) {
1033 if (mwifiex_read_reg
1034 (adapter, card->reg->status_reg_0, &winner_status))
1035 winner_status = 0;
1036
1037 if (winner_status)
1038 adapter->winner = 0;
1039 else
1040 adapter->winner = 1;
1041 }
1042 return ret;
1043 }
1044
1045 /*
1046 * This function decodes a received packet.
1047 *
1048 * Based on the type, the packet is treated as either a data, or
1049 * a command response, or an event, and the correct handler
1050 * function is invoked.
1051 */
1052 static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter,
1053 struct sk_buff *skb, u32 upld_typ)
1054 {
1055 u8 *cmd_buf;
1056 __le16 *curr_ptr = (__le16 *)skb->data;
1057 u16 pkt_len = le16_to_cpu(*curr_ptr);
1058
1059 skb_trim(skb, pkt_len);
1060 skb_pull(skb, INTF_HEADER_LEN);
1061
1062 switch (upld_typ) {
1063 case MWIFIEX_TYPE_DATA:
1064 dev_dbg(adapter->dev, "info: --- Rx: Data packet ---\n");
1065 if (adapter->rx_work_enabled) {
1066 skb_queue_tail(&adapter->rx_data_q, skb);
1067 adapter->data_received = true;
1068 atomic_inc(&adapter->rx_pending);
1069 } else {
1070 mwifiex_handle_rx_packet(adapter, skb);
1071 }
1072 break;
1073
1074 case MWIFIEX_TYPE_CMD:
1075 dev_dbg(adapter->dev, "info: --- Rx: Cmd Response ---\n");
1076 /* take care of curr_cmd = NULL case */
1077 if (!adapter->curr_cmd) {
1078 cmd_buf = adapter->upld_buf;
1079
1080 if (adapter->ps_state == PS_STATE_SLEEP_CFM)
1081 mwifiex_process_sleep_confirm_resp(adapter,
1082 skb->data,
1083 skb->len);
1084
1085 memcpy(cmd_buf, skb->data,
1086 min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER,
1087 skb->len));
1088
1089 dev_kfree_skb_any(skb);
1090 } else {
1091 adapter->cmd_resp_received = true;
1092 adapter->curr_cmd->resp_skb = skb;
1093 }
1094 break;
1095
1096 case MWIFIEX_TYPE_EVENT:
1097 dev_dbg(adapter->dev, "info: --- Rx: Event ---\n");
1098 adapter->event_cause = le32_to_cpu(*(__le32 *) skb->data);
1099
1100 if ((skb->len > 0) && (skb->len < MAX_EVENT_SIZE))
1101 memcpy(adapter->event_body,
1102 skb->data + MWIFIEX_EVENT_HEADER_LEN,
1103 skb->len);
1104
1105 /* event cause has been saved to adapter->event_cause */
1106 adapter->event_received = true;
1107 adapter->event_skb = skb;
1108
1109 break;
1110
1111 default:
1112 dev_err(adapter->dev, "unknown upload type %#x\n", upld_typ);
1113 dev_kfree_skb_any(skb);
1114 break;
1115 }
1116
1117 return 0;
1118 }
1119
1120 /*
1121 * This function transfers received packets from card to driver, performing
1122 * aggregation if required.
1123 *
1124 * For data received on control port, or if aggregation is disabled, the
1125 * received buffers are uploaded as separate packets. However, if aggregation
1126 * is enabled and required, the buffers are copied onto an aggregation buffer,
1127 * provided there is space left, processed and finally uploaded.
1128 */
1129 static int mwifiex_sdio_card_to_host_mp_aggr(struct mwifiex_adapter *adapter,
1130 struct sk_buff *skb, u8 port)
1131 {
1132 struct sdio_mmc_card *card = adapter->card;
1133 s32 f_do_rx_aggr = 0;
1134 s32 f_do_rx_cur = 0;
1135 s32 f_aggr_cur = 0;
1136 struct sk_buff *skb_deaggr;
1137 u32 pind;
1138 u32 pkt_len, pkt_type, mport;
1139 u8 *curr_ptr;
1140 u32 rx_len = skb->len;
1141
1142 if ((card->has_control_mask) && (port == CTRL_PORT)) {
1143 /* Read the command Resp without aggr */
1144 dev_dbg(adapter->dev, "info: %s: no aggregation for cmd "
1145 "response\n", __func__);
1146
1147 f_do_rx_cur = 1;
1148 goto rx_curr_single;
1149 }
1150
1151 if (!card->mpa_rx.enabled) {
1152 dev_dbg(adapter->dev, "info: %s: rx aggregation disabled\n",
1153 __func__);
1154
1155 f_do_rx_cur = 1;
1156 goto rx_curr_single;
1157 }
1158
1159 if ((!card->has_control_mask && (card->mp_rd_bitmap &
1160 card->reg->data_port_mask)) ||
1161 (card->has_control_mask && (card->mp_rd_bitmap &
1162 (~((u32) CTRL_PORT_MASK))))) {
1163 /* Some more data RX pending */
1164 dev_dbg(adapter->dev, "info: %s: not last packet\n", __func__);
1165
1166 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1167 if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len)) {
1168 f_aggr_cur = 1;
1169 } else {
1170 /* No room in Aggr buf, do rx aggr now */
1171 f_do_rx_aggr = 1;
1172 f_do_rx_cur = 1;
1173 }
1174 } else {
1175 /* Rx aggr not in progress */
1176 f_aggr_cur = 1;
1177 }
1178
1179 } else {
1180 /* No more data RX pending */
1181 dev_dbg(adapter->dev, "info: %s: last packet\n", __func__);
1182
1183 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1184 f_do_rx_aggr = 1;
1185 if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len))
1186 f_aggr_cur = 1;
1187 else
1188 /* No room in Aggr buf, do rx aggr now */
1189 f_do_rx_cur = 1;
1190 } else {
1191 f_do_rx_cur = 1;
1192 }
1193 }
1194
1195 if (f_aggr_cur) {
1196 dev_dbg(adapter->dev, "info: current packet aggregation\n");
1197 /* Curr pkt can be aggregated */
1198 mp_rx_aggr_setup(card, skb, port);
1199
1200 if (MP_RX_AGGR_PKT_LIMIT_REACHED(card) ||
1201 mp_rx_aggr_port_limit_reached(card)) {
1202 dev_dbg(adapter->dev, "info: %s: aggregated packet "
1203 "limit reached\n", __func__);
1204 /* No more pkts allowed in Aggr buf, rx it */
1205 f_do_rx_aggr = 1;
1206 }
1207 }
1208
1209 if (f_do_rx_aggr) {
1210 /* do aggr RX now */
1211 dev_dbg(adapter->dev, "info: do_rx_aggr: num of packets: %d\n",
1212 card->mpa_rx.pkt_cnt);
1213
1214 if (card->supports_sdio_new_mode) {
1215 int i;
1216 u32 port_count;
1217
1218 for (i = 0, port_count = 0; i < card->max_ports; i++)
1219 if (card->mpa_rx.ports & BIT(i))
1220 port_count++;
1221
1222 /* Reading data from "start_port + 0" to "start_port +
1223 * port_count -1", so decrease the count by 1
1224 */
1225 port_count--;
1226 mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1227 (port_count << 8)) + card->mpa_rx.start_port;
1228 } else {
1229 mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1230 (card->mpa_rx.ports << 4)) +
1231 card->mpa_rx.start_port;
1232 }
1233
1234 if (mwifiex_read_data_sync(adapter, card->mpa_rx.buf,
1235 card->mpa_rx.buf_len, mport, 1))
1236 goto error;
1237
1238 curr_ptr = card->mpa_rx.buf;
1239
1240 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1241
1242 /* get curr PKT len & type */
1243 pkt_len = le16_to_cpu(*(__le16 *) &curr_ptr[0]);
1244 pkt_type = le16_to_cpu(*(__le16 *) &curr_ptr[2]);
1245
1246 /* copy pkt to deaggr buf */
1247 skb_deaggr = card->mpa_rx.skb_arr[pind];
1248
1249 if ((pkt_type == MWIFIEX_TYPE_DATA) && (pkt_len <=
1250 card->mpa_rx.len_arr[pind])) {
1251
1252 memcpy(skb_deaggr->data, curr_ptr, pkt_len);
1253
1254 skb_trim(skb_deaggr, pkt_len);
1255
1256 /* Process de-aggr packet */
1257 mwifiex_decode_rx_packet(adapter, skb_deaggr,
1258 pkt_type);
1259 } else {
1260 dev_err(adapter->dev, "wrong aggr pkt:"
1261 " type=%d len=%d max_len=%d\n",
1262 pkt_type, pkt_len,
1263 card->mpa_rx.len_arr[pind]);
1264 dev_kfree_skb_any(skb_deaggr);
1265 }
1266 curr_ptr += card->mpa_rx.len_arr[pind];
1267 }
1268 MP_RX_AGGR_BUF_RESET(card);
1269 }
1270
1271 rx_curr_single:
1272 if (f_do_rx_cur) {
1273 dev_dbg(adapter->dev, "info: RX: port: %d, rx_len: %d\n",
1274 port, rx_len);
1275
1276 if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
1277 skb->data, skb->len,
1278 adapter->ioport + port))
1279 goto error;
1280
1281 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1282 }
1283
1284 return 0;
1285
1286 error:
1287 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1288 /* Multiport-aggregation transfer failed - cleanup */
1289 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1290 /* copy pkt to deaggr buf */
1291 skb_deaggr = card->mpa_rx.skb_arr[pind];
1292 dev_kfree_skb_any(skb_deaggr);
1293 }
1294 MP_RX_AGGR_BUF_RESET(card);
1295 }
1296
1297 if (f_do_rx_cur)
1298 /* Single transfer pending. Free curr buff also */
1299 dev_kfree_skb_any(skb);
1300
1301 return -1;
1302 }
1303
1304 /*
1305 * This function checks the current interrupt status.
1306 *
1307 * The following interrupts are checked and handled by this function -
1308 * - Data sent
1309 * - Command sent
1310 * - Packets received
1311 *
1312 * Since the firmware does not generate download ready interrupt if the
1313 * port updated is command port only, command sent interrupt checking
1314 * should be done manually, and for every SDIO interrupt.
1315 *
1316 * In case of Rx packets received, the packets are uploaded from card to
1317 * host and processed accordingly.
1318 */
1319 static int mwifiex_process_int_status(struct mwifiex_adapter *adapter)
1320 {
1321 struct sdio_mmc_card *card = adapter->card;
1322 const struct mwifiex_sdio_card_reg *reg = card->reg;
1323 int ret = 0;
1324 u8 sdio_ireg;
1325 struct sk_buff *skb;
1326 u8 port = CTRL_PORT;
1327 u32 len_reg_l, len_reg_u;
1328 u32 rx_blocks;
1329 u16 rx_len;
1330 unsigned long flags;
1331 u32 bitmap;
1332 u8 cr;
1333
1334 spin_lock_irqsave(&adapter->int_lock, flags);
1335 sdio_ireg = adapter->int_status;
1336 adapter->int_status = 0;
1337 spin_unlock_irqrestore(&adapter->int_lock, flags);
1338
1339 if (!sdio_ireg)
1340 return ret;
1341
1342 /* Following interrupt is only for SDIO new mode */
1343 if (sdio_ireg & DN_LD_CMD_PORT_HOST_INT_STATUS && adapter->cmd_sent)
1344 adapter->cmd_sent = false;
1345
1346 /* Following interrupt is only for SDIO new mode */
1347 if (sdio_ireg & UP_LD_CMD_PORT_HOST_INT_STATUS) {
1348 u32 pkt_type;
1349
1350 /* read the len of control packet */
1351 rx_len = card->mp_regs[reg->cmd_rd_len_1] << 8;
1352 rx_len |= (u16)card->mp_regs[reg->cmd_rd_len_0];
1353 rx_blocks = DIV_ROUND_UP(rx_len, MWIFIEX_SDIO_BLOCK_SIZE);
1354 if (rx_len <= INTF_HEADER_LEN ||
1355 (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1356 MWIFIEX_RX_DATA_BUF_SIZE)
1357 return -1;
1358 rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1359
1360 skb = dev_alloc_skb(rx_len);
1361 if (!skb)
1362 return -1;
1363
1364 skb_put(skb, rx_len);
1365
1366 if (mwifiex_sdio_card_to_host(adapter, &pkt_type, skb->data,
1367 skb->len, adapter->ioport |
1368 CMD_PORT_SLCT)) {
1369 dev_err(adapter->dev,
1370 "%s: failed to card_to_host", __func__);
1371 dev_kfree_skb_any(skb);
1372 goto term_cmd;
1373 }
1374
1375 if ((pkt_type != MWIFIEX_TYPE_CMD) &&
1376 (pkt_type != MWIFIEX_TYPE_EVENT))
1377 dev_err(adapter->dev,
1378 "%s:Received wrong packet on cmd port",
1379 __func__);
1380
1381 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1382 }
1383
1384 if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
1385 bitmap = (u32) card->mp_regs[reg->wr_bitmap_l];
1386 bitmap |= ((u32) card->mp_regs[reg->wr_bitmap_u]) << 8;
1387 if (card->supports_sdio_new_mode) {
1388 bitmap |=
1389 ((u32) card->mp_regs[reg->wr_bitmap_1l]) << 16;
1390 bitmap |=
1391 ((u32) card->mp_regs[reg->wr_bitmap_1u]) << 24;
1392 }
1393 card->mp_wr_bitmap = bitmap;
1394
1395 dev_dbg(adapter->dev, "int: DNLD: wr_bitmap=0x%x\n",
1396 card->mp_wr_bitmap);
1397 if (adapter->data_sent &&
1398 (card->mp_wr_bitmap & card->mp_data_port_mask)) {
1399 dev_dbg(adapter->dev,
1400 "info: <--- Tx DONE Interrupt --->\n");
1401 adapter->data_sent = false;
1402 }
1403 }
1404
1405 /* As firmware will not generate download ready interrupt if the port
1406 updated is command port only, cmd_sent should be done for any SDIO
1407 interrupt. */
1408 if (card->has_control_mask && adapter->cmd_sent) {
1409 /* Check if firmware has attach buffer at command port and
1410 update just that in wr_bit_map. */
1411 card->mp_wr_bitmap |=
1412 (u32) card->mp_regs[reg->wr_bitmap_l] & CTRL_PORT_MASK;
1413 if (card->mp_wr_bitmap & CTRL_PORT_MASK)
1414 adapter->cmd_sent = false;
1415 }
1416
1417 dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n",
1418 adapter->cmd_sent, adapter->data_sent);
1419 if (sdio_ireg & UP_LD_HOST_INT_STATUS) {
1420 bitmap = (u32) card->mp_regs[reg->rd_bitmap_l];
1421 bitmap |= ((u32) card->mp_regs[reg->rd_bitmap_u]) << 8;
1422 if (card->supports_sdio_new_mode) {
1423 bitmap |=
1424 ((u32) card->mp_regs[reg->rd_bitmap_1l]) << 16;
1425 bitmap |=
1426 ((u32) card->mp_regs[reg->rd_bitmap_1u]) << 24;
1427 }
1428 card->mp_rd_bitmap = bitmap;
1429 dev_dbg(adapter->dev, "int: UPLD: rd_bitmap=0x%x\n",
1430 card->mp_rd_bitmap);
1431
1432 while (true) {
1433 ret = mwifiex_get_rd_port(adapter, &port);
1434 if (ret) {
1435 dev_dbg(adapter->dev,
1436 "info: no more rd_port available\n");
1437 break;
1438 }
1439 len_reg_l = reg->rd_len_p0_l + (port << 1);
1440 len_reg_u = reg->rd_len_p0_u + (port << 1);
1441 rx_len = ((u16) card->mp_regs[len_reg_u]) << 8;
1442 rx_len |= (u16) card->mp_regs[len_reg_l];
1443 dev_dbg(adapter->dev, "info: RX: port=%d rx_len=%u\n",
1444 port, rx_len);
1445 rx_blocks =
1446 (rx_len + MWIFIEX_SDIO_BLOCK_SIZE -
1447 1) / MWIFIEX_SDIO_BLOCK_SIZE;
1448 if (rx_len <= INTF_HEADER_LEN ||
1449 (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1450 MWIFIEX_RX_DATA_BUF_SIZE) {
1451 dev_err(adapter->dev, "invalid rx_len=%d\n",
1452 rx_len);
1453 return -1;
1454 }
1455 rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1456
1457 skb = dev_alloc_skb(rx_len);
1458
1459 if (!skb) {
1460 dev_err(adapter->dev, "%s: failed to alloc skb",
1461 __func__);
1462 return -1;
1463 }
1464
1465 skb_put(skb, rx_len);
1466
1467 dev_dbg(adapter->dev, "info: rx_len = %d skb->len = %d\n",
1468 rx_len, skb->len);
1469
1470 if (mwifiex_sdio_card_to_host_mp_aggr(adapter, skb,
1471 port)) {
1472 dev_err(adapter->dev, "card_to_host_mpa failed:"
1473 " int status=%#x\n", sdio_ireg);
1474 goto term_cmd;
1475 }
1476 }
1477 }
1478
1479 return 0;
1480
1481 term_cmd:
1482 /* terminate cmd */
1483 if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1484 dev_err(adapter->dev, "read CFG reg failed\n");
1485 else
1486 dev_dbg(adapter->dev, "info: CFG reg val = %d\n", cr);
1487
1488 if (mwifiex_write_reg(adapter, CONFIGURATION_REG, (cr | 0x04)))
1489 dev_err(adapter->dev, "write CFG reg failed\n");
1490 else
1491 dev_dbg(adapter->dev, "info: write success\n");
1492
1493 if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
1494 dev_err(adapter->dev, "read CFG reg failed\n");
1495 else
1496 dev_dbg(adapter->dev, "info: CFG reg val =%x\n", cr);
1497
1498 return -1;
1499 }
1500
1501 /*
1502 * This function aggregates transmission buffers in driver and downloads
1503 * the aggregated packet to card.
1504 *
1505 * The individual packets are aggregated by copying into an aggregation
1506 * buffer and then downloaded to the card. Previous unsent packets in the
1507 * aggregation buffer are pre-copied first before new packets are added.
1508 * Aggregation is done till there is space left in the aggregation buffer,
1509 * or till new packets are available.
1510 *
1511 * The function will only download the packet to the card when aggregation
1512 * stops, otherwise it will just aggregate the packet in aggregation buffer
1513 * and return.
1514 */
1515 static int mwifiex_host_to_card_mp_aggr(struct mwifiex_adapter *adapter,
1516 u8 *payload, u32 pkt_len, u32 port,
1517 u32 next_pkt_len)
1518 {
1519 struct sdio_mmc_card *card = adapter->card;
1520 int ret = 0;
1521 s32 f_send_aggr_buf = 0;
1522 s32 f_send_cur_buf = 0;
1523 s32 f_precopy_cur_buf = 0;
1524 s32 f_postcopy_cur_buf = 0;
1525 u32 mport;
1526
1527 if (!card->mpa_tx.enabled ||
1528 (card->has_control_mask && (port == CTRL_PORT)) ||
1529 (card->supports_sdio_new_mode && (port == CMD_PORT_SLCT))) {
1530 dev_dbg(adapter->dev, "info: %s: tx aggregation disabled\n",
1531 __func__);
1532
1533 f_send_cur_buf = 1;
1534 goto tx_curr_single;
1535 }
1536
1537 if (next_pkt_len) {
1538 /* More pkt in TX queue */
1539 dev_dbg(adapter->dev, "info: %s: more packets in queue.\n",
1540 __func__);
1541
1542 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1543 if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len)) {
1544 f_precopy_cur_buf = 1;
1545
1546 if (!(card->mp_wr_bitmap &
1547 (1 << card->curr_wr_port)) ||
1548 !MP_TX_AGGR_BUF_HAS_ROOM(
1549 card, pkt_len + next_pkt_len))
1550 f_send_aggr_buf = 1;
1551 } else {
1552 /* No room in Aggr buf, send it */
1553 f_send_aggr_buf = 1;
1554
1555 if (!(card->mp_wr_bitmap &
1556 (1 << card->curr_wr_port)))
1557 f_send_cur_buf = 1;
1558 else
1559 f_postcopy_cur_buf = 1;
1560 }
1561 } else {
1562 if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len) &&
1563 (card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1564 f_precopy_cur_buf = 1;
1565 else
1566 f_send_cur_buf = 1;
1567 }
1568 } else {
1569 /* Last pkt in TX queue */
1570 dev_dbg(adapter->dev, "info: %s: Last packet in Tx Queue.\n",
1571 __func__);
1572
1573 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1574 /* some packs in Aggr buf already */
1575 f_send_aggr_buf = 1;
1576
1577 if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len))
1578 f_precopy_cur_buf = 1;
1579 else
1580 /* No room in Aggr buf, send it */
1581 f_send_cur_buf = 1;
1582 } else {
1583 f_send_cur_buf = 1;
1584 }
1585 }
1586
1587 if (f_precopy_cur_buf) {
1588 dev_dbg(adapter->dev, "data: %s: precopy current buffer\n",
1589 __func__);
1590 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1591
1592 if (MP_TX_AGGR_PKT_LIMIT_REACHED(card) ||
1593 mp_tx_aggr_port_limit_reached(card))
1594 /* No more pkts allowed in Aggr buf, send it */
1595 f_send_aggr_buf = 1;
1596 }
1597
1598 if (f_send_aggr_buf) {
1599 dev_dbg(adapter->dev, "data: %s: send aggr buffer: %d %d\n",
1600 __func__,
1601 card->mpa_tx.start_port, card->mpa_tx.ports);
1602 if (card->supports_sdio_new_mode) {
1603 u32 port_count;
1604 int i;
1605
1606 for (i = 0, port_count = 0; i < card->max_ports; i++)
1607 if (card->mpa_tx.ports & BIT(i))
1608 port_count++;
1609
1610 /* Writing data from "start_port + 0" to "start_port +
1611 * port_count -1", so decrease the count by 1
1612 */
1613 port_count--;
1614 mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1615 (port_count << 8)) + card->mpa_tx.start_port;
1616 } else {
1617 mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
1618 (card->mpa_tx.ports << 4)) +
1619 card->mpa_tx.start_port;
1620 }
1621
1622 ret = mwifiex_write_data_to_card(adapter, card->mpa_tx.buf,
1623 card->mpa_tx.buf_len, mport);
1624
1625 MP_TX_AGGR_BUF_RESET(card);
1626 }
1627
1628 tx_curr_single:
1629 if (f_send_cur_buf) {
1630 dev_dbg(adapter->dev, "data: %s: send current buffer %d\n",
1631 __func__, port);
1632 ret = mwifiex_write_data_to_card(adapter, payload, pkt_len,
1633 adapter->ioport + port);
1634 }
1635
1636 if (f_postcopy_cur_buf) {
1637 dev_dbg(adapter->dev, "data: %s: postcopy current buffer\n",
1638 __func__);
1639 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1640 }
1641
1642 return ret;
1643 }
1644
1645 /*
1646 * This function downloads data from driver to card.
1647 *
1648 * Both commands and data packets are transferred to the card by this
1649 * function.
1650 *
1651 * This function adds the SDIO specific header to the front of the buffer
1652 * before transferring. The header contains the length of the packet and
1653 * the type. The firmware handles the packets based upon this set type.
1654 */
1655 static int mwifiex_sdio_host_to_card(struct mwifiex_adapter *adapter,
1656 u8 type, struct sk_buff *skb,
1657 struct mwifiex_tx_param *tx_param)
1658 {
1659 struct sdio_mmc_card *card = adapter->card;
1660 int ret;
1661 u32 buf_block_len;
1662 u32 blk_size;
1663 u32 port = CTRL_PORT;
1664 u8 *payload = (u8 *)skb->data;
1665 u32 pkt_len = skb->len;
1666
1667 /* Allocate buffer and copy payload */
1668 blk_size = MWIFIEX_SDIO_BLOCK_SIZE;
1669 buf_block_len = (pkt_len + blk_size - 1) / blk_size;
1670 *(__le16 *)&payload[0] = cpu_to_le16((u16)pkt_len);
1671 *(__le16 *)&payload[2] = cpu_to_le16(type);
1672
1673 /*
1674 * This is SDIO specific header
1675 * u16 length,
1676 * u16 type (MWIFIEX_TYPE_DATA = 0, MWIFIEX_TYPE_CMD = 1,
1677 * MWIFIEX_TYPE_EVENT = 3)
1678 */
1679 if (type == MWIFIEX_TYPE_DATA) {
1680 ret = mwifiex_get_wr_port_data(adapter, &port);
1681 if (ret) {
1682 dev_err(adapter->dev, "%s: no wr_port available\n",
1683 __func__);
1684 return ret;
1685 }
1686 } else {
1687 adapter->cmd_sent = true;
1688 /* Type must be MWIFIEX_TYPE_CMD */
1689
1690 if (pkt_len <= INTF_HEADER_LEN ||
1691 pkt_len > MWIFIEX_UPLD_SIZE)
1692 dev_err(adapter->dev, "%s: payload=%p, nb=%d\n",
1693 __func__, payload, pkt_len);
1694
1695 if (card->supports_sdio_new_mode)
1696 port = CMD_PORT_SLCT;
1697 }
1698
1699 /* Transfer data to card */
1700 pkt_len = buf_block_len * blk_size;
1701
1702 if (tx_param)
1703 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1704 port, tx_param->next_pkt_len
1705 );
1706 else
1707 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1708 port, 0);
1709
1710 if (ret) {
1711 if (type == MWIFIEX_TYPE_CMD)
1712 adapter->cmd_sent = false;
1713 if (type == MWIFIEX_TYPE_DATA) {
1714 adapter->data_sent = false;
1715 /* restore curr_wr_port in error cases */
1716 card->curr_wr_port = port;
1717 card->mp_wr_bitmap |= (u32)(1 << card->curr_wr_port);
1718 }
1719 } else {
1720 if (type == MWIFIEX_TYPE_DATA) {
1721 if (!(card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1722 adapter->data_sent = true;
1723 else
1724 adapter->data_sent = false;
1725 }
1726 }
1727
1728 return ret;
1729 }
1730
1731 /*
1732 * This function allocates the MPA Tx and Rx buffers.
1733 */
1734 static int mwifiex_alloc_sdio_mpa_buffers(struct mwifiex_adapter *adapter,
1735 u32 mpa_tx_buf_size, u32 mpa_rx_buf_size)
1736 {
1737 struct sdio_mmc_card *card = adapter->card;
1738 int ret = 0;
1739
1740 card->mpa_tx.buf = kzalloc(mpa_tx_buf_size, GFP_KERNEL);
1741 if (!card->mpa_tx.buf) {
1742 ret = -1;
1743 goto error;
1744 }
1745
1746 card->mpa_tx.buf_size = mpa_tx_buf_size;
1747
1748 card->mpa_rx.buf = kzalloc(mpa_rx_buf_size, GFP_KERNEL);
1749 if (!card->mpa_rx.buf) {
1750 ret = -1;
1751 goto error;
1752 }
1753
1754 card->mpa_rx.buf_size = mpa_rx_buf_size;
1755
1756 error:
1757 if (ret) {
1758 kfree(card->mpa_tx.buf);
1759 kfree(card->mpa_rx.buf);
1760 }
1761
1762 return ret;
1763 }
1764
1765 /*
1766 * This function unregisters the SDIO device.
1767 *
1768 * The SDIO IRQ is released, the function is disabled and driver
1769 * data is set to null.
1770 */
1771 static void
1772 mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
1773 {
1774 struct sdio_mmc_card *card = adapter->card;
1775
1776 if (adapter->card) {
1777 sdio_claim_host(card->func);
1778 sdio_disable_func(card->func);
1779 sdio_release_host(card->func);
1780 }
1781 }
1782
1783 /*
1784 * This function registers the SDIO device.
1785 *
1786 * SDIO IRQ is claimed, block size is set and driver data is initialized.
1787 */
1788 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
1789 {
1790 int ret;
1791 struct sdio_mmc_card *card = adapter->card;
1792 struct sdio_func *func = card->func;
1793
1794 /* save adapter pointer in card */
1795 card->adapter = adapter;
1796 adapter->tx_buf_size = card->tx_buf_size;
1797
1798 sdio_claim_host(func);
1799
1800 /* Set block size */
1801 ret = sdio_set_block_size(card->func, MWIFIEX_SDIO_BLOCK_SIZE);
1802 sdio_release_host(func);
1803 if (ret) {
1804 pr_err("cannot set SDIO block size\n");
1805 return ret;
1806 }
1807
1808
1809 adapter->dev = &func->dev;
1810
1811 strcpy(adapter->fw_name, card->firmware);
1812 adapter->mem_type_mapping_tbl = mem_type_mapping_tbl;
1813 adapter->num_mem_types = ARRAY_SIZE(mem_type_mapping_tbl);
1814
1815 return 0;
1816 }
1817
1818 /*
1819 * This function initializes the SDIO driver.
1820 *
1821 * The following initializations steps are followed -
1822 * - Read the Host interrupt status register to acknowledge
1823 * the first interrupt got from bootloader
1824 * - Disable host interrupt mask register
1825 * - Get SDIO port
1826 * - Initialize SDIO variables in card
1827 * - Allocate MP registers
1828 * - Allocate MPA Tx and Rx buffers
1829 */
1830 static int mwifiex_init_sdio(struct mwifiex_adapter *adapter)
1831 {
1832 struct sdio_mmc_card *card = adapter->card;
1833 const struct mwifiex_sdio_card_reg *reg = card->reg;
1834 int ret;
1835 u8 sdio_ireg;
1836
1837 sdio_set_drvdata(card->func, card);
1838
1839 /*
1840 * Read the host_int_status_reg for ACK the first interrupt got
1841 * from the bootloader. If we don't do this we get a interrupt
1842 * as soon as we register the irq.
1843 */
1844 mwifiex_read_reg(adapter, card->reg->host_int_status_reg, &sdio_ireg);
1845
1846 /* Get SDIO ioport */
1847 mwifiex_init_sdio_ioport(adapter);
1848
1849 /* Initialize SDIO variables in card */
1850 card->mp_rd_bitmap = 0;
1851 card->mp_wr_bitmap = 0;
1852 card->curr_rd_port = reg->start_rd_port;
1853 card->curr_wr_port = reg->start_wr_port;
1854
1855 card->mp_data_port_mask = reg->data_port_mask;
1856
1857 card->mpa_tx.buf_len = 0;
1858 card->mpa_tx.pkt_cnt = 0;
1859 card->mpa_tx.start_port = 0;
1860
1861 card->mpa_tx.enabled = 1;
1862 card->mpa_tx.pkt_aggr_limit = card->mp_agg_pkt_limit;
1863
1864 card->mpa_rx.buf_len = 0;
1865 card->mpa_rx.pkt_cnt = 0;
1866 card->mpa_rx.start_port = 0;
1867
1868 card->mpa_rx.enabled = 1;
1869 card->mpa_rx.pkt_aggr_limit = card->mp_agg_pkt_limit;
1870
1871 /* Allocate buffers for SDIO MP-A */
1872 card->mp_regs = kzalloc(reg->max_mp_regs, GFP_KERNEL);
1873 if (!card->mp_regs)
1874 return -ENOMEM;
1875
1876 /* Allocate skb pointer buffers */
1877 card->mpa_rx.skb_arr = kzalloc((sizeof(void *)) *
1878 card->mp_agg_pkt_limit, GFP_KERNEL);
1879 card->mpa_rx.len_arr = kzalloc(sizeof(*card->mpa_rx.len_arr) *
1880 card->mp_agg_pkt_limit, GFP_KERNEL);
1881 ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
1882 card->mp_tx_agg_buf_size,
1883 card->mp_rx_agg_buf_size);
1884 if (ret) {
1885 dev_err(adapter->dev, "failed to alloc sdio mp-a buffers\n");
1886 kfree(card->mp_regs);
1887 return -1;
1888 }
1889
1890 adapter->auto_tdls = card->auto_tdls;
1891 adapter->ext_scan = card->can_ext_scan;
1892 return ret;
1893 }
1894
1895 /*
1896 * This function resets the MPA Tx and Rx buffers.
1897 */
1898 static void mwifiex_cleanup_mpa_buf(struct mwifiex_adapter *adapter)
1899 {
1900 struct sdio_mmc_card *card = adapter->card;
1901
1902 MP_TX_AGGR_BUF_RESET(card);
1903 MP_RX_AGGR_BUF_RESET(card);
1904 }
1905
1906 /*
1907 * This function cleans up the allocated card buffers.
1908 *
1909 * The following are freed by this function -
1910 * - MP registers
1911 * - MPA Tx buffer
1912 * - MPA Rx buffer
1913 */
1914 static void mwifiex_cleanup_sdio(struct mwifiex_adapter *adapter)
1915 {
1916 struct sdio_mmc_card *card = adapter->card;
1917
1918 kfree(card->mp_regs);
1919 kfree(card->mpa_rx.skb_arr);
1920 kfree(card->mpa_rx.len_arr);
1921 kfree(card->mpa_tx.buf);
1922 kfree(card->mpa_rx.buf);
1923 sdio_set_drvdata(card->func, NULL);
1924 kfree(card);
1925 }
1926
1927 /*
1928 * This function updates the MP end port in card.
1929 */
1930 static void
1931 mwifiex_update_mp_end_port(struct mwifiex_adapter *adapter, u16 port)
1932 {
1933 struct sdio_mmc_card *card = adapter->card;
1934 const struct mwifiex_sdio_card_reg *reg = card->reg;
1935 int i;
1936
1937 card->mp_end_port = port;
1938
1939 card->mp_data_port_mask = reg->data_port_mask;
1940
1941 if (reg->start_wr_port) {
1942 for (i = 1; i <= card->max_ports - card->mp_end_port; i++)
1943 card->mp_data_port_mask &=
1944 ~(1 << (card->max_ports - i));
1945 }
1946
1947 card->curr_wr_port = reg->start_wr_port;
1948
1949 dev_dbg(adapter->dev, "cmd: mp_end_port %d, data port mask 0x%x\n",
1950 port, card->mp_data_port_mask);
1951 }
1952
1953 static void mwifiex_sdio_card_reset_work(struct mwifiex_adapter *adapter)
1954 {
1955 struct sdio_mmc_card *card = adapter->card;
1956 struct mmc_host *target = card->func->card->host;
1957
1958 /* The actual reset operation must be run outside of driver thread.
1959 * This is because mmc_remove_host() will cause the device to be
1960 * instantly destroyed, and the driver then needs to end its thread,
1961 * leading to a deadlock.
1962 *
1963 * We run it in a totally independent workqueue.
1964 */
1965
1966 pr_err("Resetting card...\n");
1967 mmc_remove_host(target);
1968 /* 200ms delay is based on experiment with sdhci controller */
1969 mdelay(200);
1970 target->rescan_entered = 0; /* rescan non-removable cards */
1971 mmc_add_host(target);
1972 }
1973
1974 /* This function read/write firmware */
1975 static enum
1976 rdwr_status mwifiex_sdio_rdwr_firmware(struct mwifiex_adapter *adapter,
1977 u8 doneflag)
1978 {
1979 struct sdio_mmc_card *card = adapter->card;
1980 int ret, tries;
1981 u8 ctrl_data = 0;
1982
1983 sdio_writeb(card->func, FW_DUMP_HOST_READY, card->reg->fw_dump_ctrl,
1984 &ret);
1985 if (ret) {
1986 dev_err(adapter->dev, "SDIO Write ERR\n");
1987 return RDWR_STATUS_FAILURE;
1988 }
1989 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
1990 ctrl_data = sdio_readb(card->func, card->reg->fw_dump_ctrl,
1991 &ret);
1992 if (ret) {
1993 dev_err(adapter->dev, "SDIO read err\n");
1994 return RDWR_STATUS_FAILURE;
1995 }
1996 if (ctrl_data == FW_DUMP_DONE)
1997 break;
1998 if (doneflag && ctrl_data == doneflag)
1999 return RDWR_STATUS_DONE;
2000 if (ctrl_data != FW_DUMP_HOST_READY) {
2001 dev_info(adapter->dev,
2002 "The ctrl reg was changed, re-try again!\n");
2003 sdio_writeb(card->func, FW_DUMP_HOST_READY,
2004 card->reg->fw_dump_ctrl, &ret);
2005 if (ret) {
2006 dev_err(adapter->dev, "SDIO write err\n");
2007 return RDWR_STATUS_FAILURE;
2008 }
2009 }
2010 usleep_range(100, 200);
2011 }
2012 if (ctrl_data == FW_DUMP_HOST_READY) {
2013 dev_err(adapter->dev, "Fail to pull ctrl_data\n");
2014 return RDWR_STATUS_FAILURE;
2015 }
2016
2017 return RDWR_STATUS_SUCCESS;
2018 }
2019
2020 /* This function dump firmware memory to file */
2021 static void mwifiex_sdio_fw_dump_work(struct work_struct *work)
2022 {
2023 struct mwifiex_adapter *adapter =
2024 container_of(work, struct mwifiex_adapter, iface_work);
2025 struct sdio_mmc_card *card = adapter->card;
2026 int ret = 0;
2027 unsigned int reg, reg_start, reg_end;
2028 u8 *dbg_ptr, *end_ptr, dump_num, idx, i, read_reg, doneflag = 0;
2029 enum rdwr_status stat;
2030 u32 memory_size;
2031 static char *env[] = { "DRIVER=mwifiex_sdio", "EVENT=fw_dump", NULL };
2032
2033 mwifiex_dump_drv_info(adapter);
2034
2035 if (!card->supports_fw_dump)
2036 return;
2037
2038 for (idx = 0; idx < ARRAY_SIZE(mem_type_mapping_tbl); idx++) {
2039 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
2040
2041 if (entry->mem_ptr) {
2042 vfree(entry->mem_ptr);
2043 entry->mem_ptr = NULL;
2044 }
2045 entry->mem_size = 0;
2046 }
2047
2048 mwifiex_pm_wakeup_card(adapter);
2049 sdio_claim_host(card->func);
2050
2051 dev_info(adapter->dev, "== mwifiex firmware dump start ==\n");
2052
2053 stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2054 if (stat == RDWR_STATUS_FAILURE)
2055 goto done;
2056
2057 reg = card->reg->fw_dump_start;
2058 /* Read the number of the memories which will dump */
2059 dump_num = sdio_readb(card->func, reg, &ret);
2060 if (ret) {
2061 dev_err(adapter->dev, "SDIO read memory length err\n");
2062 goto done;
2063 }
2064
2065 /* Read the length of every memory which will dump */
2066 for (idx = 0; idx < dump_num; idx++) {
2067 struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
2068
2069 stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2070 if (stat == RDWR_STATUS_FAILURE)
2071 goto done;
2072
2073 memory_size = 0;
2074 reg = card->reg->fw_dump_start;
2075 for (i = 0; i < 4; i++) {
2076 read_reg = sdio_readb(card->func, reg, &ret);
2077 if (ret) {
2078 dev_err(adapter->dev, "SDIO read err\n");
2079 goto done;
2080 }
2081 memory_size |= (read_reg << i*8);
2082 reg++;
2083 }
2084
2085 if (memory_size == 0) {
2086 dev_info(adapter->dev, "Firmware dump Finished!\n");
2087 break;
2088 }
2089
2090 dev_info(adapter->dev,
2091 "%s_SIZE=0x%x\n", entry->mem_name, memory_size);
2092 entry->mem_ptr = vmalloc(memory_size + 1);
2093 entry->mem_size = memory_size;
2094 if (!entry->mem_ptr) {
2095 dev_err(adapter->dev, "Vmalloc %s failed\n",
2096 entry->mem_name);
2097 goto done;
2098 }
2099 dbg_ptr = entry->mem_ptr;
2100 end_ptr = dbg_ptr + memory_size;
2101
2102 doneflag = entry->done_flag;
2103 dev_info(adapter->dev, "Start %s output, please wait...\n",
2104 entry->mem_name);
2105
2106 do {
2107 stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
2108 if (stat == RDWR_STATUS_FAILURE)
2109 goto done;
2110
2111 reg_start = card->reg->fw_dump_start;
2112 reg_end = card->reg->fw_dump_end;
2113 for (reg = reg_start; reg <= reg_end; reg++) {
2114 *dbg_ptr = sdio_readb(card->func, reg, &ret);
2115 if (ret) {
2116 dev_err(adapter->dev,
2117 "SDIO read err\n");
2118 goto done;
2119 }
2120 if (dbg_ptr < end_ptr)
2121 dbg_ptr++;
2122 else
2123 dev_err(adapter->dev,
2124 "Allocated buf not enough\n");
2125 }
2126
2127 if (stat != RDWR_STATUS_DONE)
2128 continue;
2129
2130 dev_info(adapter->dev, "%s done: size=0x%tx\n",
2131 entry->mem_name, dbg_ptr - entry->mem_ptr);
2132 break;
2133 } while (1);
2134 }
2135 dev_info(adapter->dev, "== mwifiex firmware dump end ==\n");
2136
2137 kobject_uevent_env(&adapter->wiphy->dev.kobj, KOBJ_CHANGE, env);
2138
2139 done:
2140 sdio_release_host(card->func);
2141 adapter->curr_mem_idx = 0;
2142 }
2143
2144 static void mwifiex_sdio_work(struct work_struct *work)
2145 {
2146 struct mwifiex_adapter *adapter =
2147 container_of(work, struct mwifiex_adapter, iface_work);
2148
2149 if (test_and_clear_bit(MWIFIEX_IFACE_WORK_CARD_RESET,
2150 &adapter->iface_work_flags))
2151 mwifiex_sdio_card_reset_work(adapter);
2152 if (test_and_clear_bit(MWIFIEX_IFACE_WORK_FW_DUMP,
2153 &adapter->iface_work_flags))
2154 mwifiex_sdio_fw_dump_work(work);
2155 }
2156
2157 /* This function resets the card */
2158 static void mwifiex_sdio_card_reset(struct mwifiex_adapter *adapter)
2159 {
2160 if (test_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &adapter->iface_work_flags))
2161 return;
2162
2163 set_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &adapter->iface_work_flags);
2164
2165 schedule_work(&adapter->iface_work);
2166 }
2167
2168 /* This function dumps FW information */
2169 static void mwifiex_sdio_fw_dump(struct mwifiex_adapter *adapter)
2170 {
2171 if (test_bit(MWIFIEX_IFACE_WORK_FW_DUMP, &adapter->iface_work_flags))
2172 return;
2173
2174 set_bit(MWIFIEX_IFACE_WORK_FW_DUMP, &adapter->iface_work_flags);
2175 schedule_work(&adapter->iface_work);
2176 }
2177
2178 /* Function to dump SDIO function registers and SDIO scratch registers in case
2179 * of FW crash
2180 */
2181 static int
2182 mwifiex_sdio_reg_dump(struct mwifiex_adapter *adapter, char *drv_buf)
2183 {
2184 char *p = drv_buf;
2185 struct sdio_mmc_card *cardp = adapter->card;
2186 int ret = 0;
2187 u8 count, func, data, index = 0, size = 0;
2188 u8 reg, reg_start, reg_end;
2189 char buf[256], *ptr;
2190
2191 if (!p)
2192 return 0;
2193
2194 dev_info(adapter->dev, "SDIO register DUMP START\n");
2195
2196 mwifiex_pm_wakeup_card(adapter);
2197
2198 sdio_claim_host(cardp->func);
2199
2200 for (count = 0; count < 5; count++) {
2201 memset(buf, 0, sizeof(buf));
2202 ptr = buf;
2203
2204 switch (count) {
2205 case 0:
2206 /* Read the registers of SDIO function0 */
2207 func = count;
2208 reg_start = 0;
2209 reg_end = 9;
2210 break;
2211 case 1:
2212 /* Read the registers of SDIO function1 */
2213 func = count;
2214 reg_start = cardp->reg->func1_dump_reg_start;
2215 reg_end = cardp->reg->func1_dump_reg_end;
2216 break;
2217 case 2:
2218 index = 0;
2219 func = 1;
2220 reg_start = cardp->reg->func1_spec_reg_table[index++];
2221 size = cardp->reg->func1_spec_reg_num;
2222 reg_end = cardp->reg->func1_spec_reg_table[size-1];
2223 break;
2224 default:
2225 /* Read the scratch registers of SDIO function1 */
2226 if (count == 4)
2227 mdelay(100);
2228 func = 1;
2229 reg_start = cardp->reg->func1_scratch_reg;
2230 reg_end = reg_start + MWIFIEX_SDIO_SCRATCH_SIZE;
2231 }
2232
2233 if (count != 2)
2234 ptr += sprintf(ptr, "SDIO Func%d (%#x-%#x): ",
2235 func, reg_start, reg_end);
2236 else
2237 ptr += sprintf(ptr, "SDIO Func%d: ", func);
2238
2239 for (reg = reg_start; reg <= reg_end;) {
2240 if (func == 0)
2241 data = sdio_f0_readb(cardp->func, reg, &ret);
2242 else
2243 data = sdio_readb(cardp->func, reg, &ret);
2244
2245 if (count == 2)
2246 ptr += sprintf(ptr, "(%#x) ", reg);
2247 if (!ret) {
2248 ptr += sprintf(ptr, "%02x ", data);
2249 } else {
2250 ptr += sprintf(ptr, "ERR");
2251 break;
2252 }
2253
2254 if (count == 2 && reg < reg_end)
2255 reg = cardp->reg->func1_spec_reg_table[index++];
2256 else
2257 reg++;
2258 }
2259
2260 dev_info(adapter->dev, "%s\n", buf);
2261 p += sprintf(p, "%s\n", buf);
2262 }
2263
2264 sdio_release_host(cardp->func);
2265
2266 dev_info(adapter->dev, "SDIO register DUMP END\n");
2267
2268 return p - drv_buf;
2269 }
2270
2271 static struct mwifiex_if_ops sdio_ops = {
2272 .init_if = mwifiex_init_sdio,
2273 .cleanup_if = mwifiex_cleanup_sdio,
2274 .check_fw_status = mwifiex_check_fw_status,
2275 .prog_fw = mwifiex_prog_fw_w_helper,
2276 .register_dev = mwifiex_register_dev,
2277 .unregister_dev = mwifiex_unregister_dev,
2278 .enable_int = mwifiex_sdio_enable_host_int,
2279 .disable_int = mwifiex_sdio_disable_host_int,
2280 .process_int_status = mwifiex_process_int_status,
2281 .host_to_card = mwifiex_sdio_host_to_card,
2282 .wakeup = mwifiex_pm_wakeup_card,
2283 .wakeup_complete = mwifiex_pm_wakeup_card_complete,
2284
2285 /* SDIO specific */
2286 .update_mp_end_port = mwifiex_update_mp_end_port,
2287 .cleanup_mpa_buf = mwifiex_cleanup_mpa_buf,
2288 .cmdrsp_complete = mwifiex_sdio_cmdrsp_complete,
2289 .event_complete = mwifiex_sdio_event_complete,
2290 .card_reset = mwifiex_sdio_card_reset,
2291 .iface_work = mwifiex_sdio_work,
2292 .fw_dump = mwifiex_sdio_fw_dump,
2293 .reg_dump = mwifiex_sdio_reg_dump,
2294 };
2295
2296 /*
2297 * This function initializes the SDIO driver.
2298 *
2299 * This initiates the semaphore and registers the device with
2300 * SDIO bus.
2301 */
2302 static int
2303 mwifiex_sdio_init_module(void)
2304 {
2305 sema_init(&add_remove_card_sem, 1);
2306
2307 /* Clear the flag in case user removes the card. */
2308 user_rmmod = 0;
2309
2310 return sdio_register_driver(&mwifiex_sdio);
2311 }
2312
2313 /*
2314 * This function cleans up the SDIO driver.
2315 *
2316 * The following major steps are followed for cleanup -
2317 * - Resume the device if its suspended
2318 * - Disconnect the device if connected
2319 * - Shutdown the firmware
2320 * - Unregister the device from SDIO bus.
2321 */
2322 static void
2323 mwifiex_sdio_cleanup_module(void)
2324 {
2325 if (!down_interruptible(&add_remove_card_sem))
2326 up(&add_remove_card_sem);
2327
2328 /* Set the flag as user is removing this module. */
2329 user_rmmod = 1;
2330
2331 sdio_unregister_driver(&mwifiex_sdio);
2332 }
2333
2334 module_init(mwifiex_sdio_init_module);
2335 module_exit(mwifiex_sdio_cleanup_module);
2336
2337 MODULE_AUTHOR("Marvell International Ltd.");
2338 MODULE_DESCRIPTION("Marvell WiFi-Ex SDIO Driver version " SDIO_VERSION);
2339 MODULE_VERSION(SDIO_VERSION);
2340 MODULE_LICENSE("GPL v2");
2341 MODULE_FIRMWARE(SD8786_DEFAULT_FW_NAME);
2342 MODULE_FIRMWARE(SD8787_DEFAULT_FW_NAME);
2343 MODULE_FIRMWARE(SD8797_DEFAULT_FW_NAME);
2344 MODULE_FIRMWARE(SD8897_DEFAULT_FW_NAME);
2345 MODULE_FIRMWARE(SD8887_DEFAULT_FW_NAME);
Linux kernel - Deliverables
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