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
mwifiex_sdio_probe(struct sdio_func * func,const struct sdio_device_id * id)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 */
mwifiex_sdio_resume(struct device * dev)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
mwifiex_sdio_remove(struct sdio_func * func)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 */
mwifiex_sdio_suspend(struct device * dev)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
mwifiex_write_reg_locked(struct sdio_func * func,u32 reg,u8 data)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
mwifiex_write_reg(struct mwifiex_adapter * adapter,u32 reg,u8 data)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
mwifiex_read_reg(struct mwifiex_adapter * adapter,u32 reg,u8 * data)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
mwifiex_write_data_sync(struct mwifiex_adapter * adapter,u8 * buffer,u32 pkt_len,u32 port)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 */
mwifiex_read_data_sync(struct mwifiex_adapter * adapter,u8 * buffer,u32 len,u32 port,u8 claim)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 */
mwifiex_pm_wakeup_card(struct mwifiex_adapter * adapter)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 */
mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter * adapter)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 */
mwifiex_init_sdio_new_mode(struct mwifiex_adapter * adapter)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, ®))
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, ®))
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, ®))
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 */
mwifiex_init_sdio_ioport(struct mwifiex_adapter * adapter)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, ®))
513 adapter->ioport |= (reg & 0xff);
514 else
515 return -1;
516
517 if (!mwifiex_read_reg(adapter, card->reg->io_port_1_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, ®))
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, ®))
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, ®))
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 */
mwifiex_write_data_to_card(struct mwifiex_adapter * adapter,u8 * payload,u32 pkt_len,u32 port)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 */
mwifiex_get_rd_port(struct mwifiex_adapter * adapter,u8 * port)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 */
mwifiex_get_wr_port_data(struct mwifiex_adapter * adapter,u32 * port)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
mwifiex_sdio_poll_card_status(struct mwifiex_adapter * adapter,u8 bits)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
mwifiex_sdio_read_fw_status(struct mwifiex_adapter * adapter,u16 * dat)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 */
mwifiex_sdio_disable_host_int(struct mwifiex_adapter * adapter)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 */
mwifiex_interrupt_status(struct mwifiex_adapter * adapter)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
mwifiex_sdio_interrupt(struct sdio_func * func)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 */
mwifiex_sdio_enable_host_int(struct mwifiex_adapter * adapter)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 */
mwifiex_sdio_card_to_host(struct mwifiex_adapter * adapter,u32 * type,u8 * buffer,u32 npayload,u32 ioport)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 */
mwifiex_prog_fw_w_helper(struct mwifiex_adapter * adapter,struct mwifiex_fw_image * fw)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 */
mwifiex_check_fw_status(struct mwifiex_adapter * adapter,u32 poll_num)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 */
mwifiex_deaggr_sdio_pkt(struct mwifiex_adapter * adapter,struct sk_buff * skb)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 */
mwifiex_decode_rx_packet(struct mwifiex_adapter * adapter,struct sk_buff * skb,u32 upld_typ)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 */
mwifiex_sdio_card_to_host_mp_aggr(struct mwifiex_adapter * adapter,u16 rx_len,u8 port)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 */
mwifiex_process_int_status(struct mwifiex_adapter * adapter)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 */
mwifiex_host_to_card_mp_aggr(struct mwifiex_adapter * adapter,u8 * payload,u32 pkt_len,u32 port,u32 next_pkt_len)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 */
mwifiex_sdio_host_to_card(struct mwifiex_adapter * adapter,u8 type,struct sk_buff * skb,struct mwifiex_tx_param * tx_param)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 */
mwifiex_alloc_sdio_mpa_buffers(struct mwifiex_adapter * adapter,u32 mpa_tx_buf_size,u32 mpa_rx_buf_size)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
mwifiex_unregister_dev(struct mwifiex_adapter * adapter)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 */
mwifiex_register_dev(struct mwifiex_adapter * adapter)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 */
mwifiex_init_sdio(struct mwifiex_adapter * adapter)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 */
mwifiex_cleanup_mpa_buf(struct mwifiex_adapter * adapter)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 */
mwifiex_cleanup_sdio(struct mwifiex_adapter * adapter)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
mwifiex_update_mp_end_port(struct mwifiex_adapter * adapter,u16 port)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;
mwifiex_sdio_card_reset_work(struct mwifiex_adapter * 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
mwifiex_sdio_rdwr_firmware(struct mwifiex_adapter * adapter,u8 doneflag)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 */
mwifiex_sdio_fw_dump_work(struct mwifiex_adapter * adapter)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
mwifiex_sdio_work(struct work_struct * work)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 */
mwifiex_sdio_card_reset(struct mwifiex_adapter * adapter)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 */
mwifiex_sdio_fw_dump(struct mwifiex_adapter * adapter)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
mwifiex_sdio_reg_dump(struct mwifiex_adapter * adapter,char * drv_buf)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
mwifiex_sdio_init_module(void)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
mwifiex_sdio_cleanup_module(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