1 /*
2 * Copyright (c) 2014 Redpine Signals Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 *
16 */
17
18 #include <linux/module.h>
19 #include "rsi_sdio.h"
20 #include "rsi_common.h"
21 #include "rsi_coex.h"
22 #include "rsi_hal.h"
23
24 /* Default operating mode is wlan STA + BT */
25 static u16 dev_oper_mode = DEV_OPMODE_STA_BT_DUAL;
26 module_param(dev_oper_mode, ushort, 0444);
27 MODULE_PARM_DESC(dev_oper_mode,
28 "1[Wi-Fi], 4[BT], 8[BT LE], 5[Wi-Fi STA + BT classic]\n"
29 "9[Wi-Fi STA + BT LE], 13[Wi-Fi STA + BT classic + BT LE]\n"
30 "6[AP + BT classic], 14[AP + BT classic + BT LE]");
31
32 /**
33 * rsi_sdio_set_cmd52_arg() - This function prepares cmd 52 read/write arg.
34 * @rw: Read/write
35 * @func: function number
36 * @raw: indicates whether to perform read after write
37 * @address: address to which to read/write
38 * @writedata: data to write
39 *
40 * Return: argument
41 */
rsi_sdio_set_cmd52_arg(bool rw,u8 func,u8 raw,u32 address,u8 writedata)42 static u32 rsi_sdio_set_cmd52_arg(bool rw,
43 u8 func,
44 u8 raw,
45 u32 address,
46 u8 writedata)
47 {
48 return ((rw & 1) << 31) | ((func & 0x7) << 28) |
49 ((raw & 1) << 27) | (1 << 26) |
50 ((address & 0x1FFFF) << 9) | (1 << 8) |
51 (writedata & 0xFF);
52 }
53
54 /**
55 * rsi_cmd52writebyte() - This function issues cmd52 byte write onto the card.
56 * @card: Pointer to the mmc_card.
57 * @address: Address to write.
58 * @byte: Data to write.
59 *
60 * Return: Write status.
61 */
rsi_cmd52writebyte(struct mmc_card * card,u32 address,u8 byte)62 static int rsi_cmd52writebyte(struct mmc_card *card,
63 u32 address,
64 u8 byte)
65 {
66 struct mmc_command io_cmd;
67 u32 arg;
68
69 memset(&io_cmd, 0, sizeof(io_cmd));
70 arg = rsi_sdio_set_cmd52_arg(1, 0, 0, address, byte);
71 io_cmd.opcode = SD_IO_RW_DIRECT;
72 io_cmd.arg = arg;
73 io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
74
75 return mmc_wait_for_cmd(card->host, &io_cmd, 0);
76 }
77
78 /**
79 * rsi_cmd52readbyte() - This function issues cmd52 byte read onto the card.
80 * @card: Pointer to the mmc_card.
81 * @address: Address to read from.
82 * @byte: Variable to store read value.
83 *
84 * Return: Read status.
85 */
rsi_cmd52readbyte(struct mmc_card * card,u32 address,u8 * byte)86 static int rsi_cmd52readbyte(struct mmc_card *card,
87 u32 address,
88 u8 *byte)
89 {
90 struct mmc_command io_cmd;
91 u32 arg;
92 int err;
93
94 memset(&io_cmd, 0, sizeof(io_cmd));
95 arg = rsi_sdio_set_cmd52_arg(0, 0, 0, address, 0);
96 io_cmd.opcode = SD_IO_RW_DIRECT;
97 io_cmd.arg = arg;
98 io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
99
100 err = mmc_wait_for_cmd(card->host, &io_cmd, 0);
101 if ((!err) && (byte))
102 *byte = io_cmd.resp[0] & 0xFF;
103 return err;
104 }
105
106 /**
107 * rsi_issue_sdiocommand() - This function issues sdio commands.
108 * @func: Pointer to the sdio_func structure.
109 * @opcode: Opcode value.
110 * @arg: Arguments to pass.
111 * @flags: Flags which are set.
112 * @resp: Pointer to store response.
113 *
114 * Return: err: command status as 0 or -1.
115 */
rsi_issue_sdiocommand(struct sdio_func * func,u32 opcode,u32 arg,u32 flags,u32 * resp)116 static int rsi_issue_sdiocommand(struct sdio_func *func,
117 u32 opcode,
118 u32 arg,
119 u32 flags,
120 u32 *resp)
121 {
122 struct mmc_command cmd;
123 struct mmc_host *host;
124 int err;
125
126 host = func->card->host;
127
128 memset(&cmd, 0, sizeof(struct mmc_command));
129 cmd.opcode = opcode;
130 cmd.arg = arg;
131 cmd.flags = flags;
132 err = mmc_wait_for_cmd(host, &cmd, 3);
133
134 if ((!err) && (resp))
135 *resp = cmd.resp[0];
136
137 return err;
138 }
139
140 /**
141 * rsi_handle_interrupt() - This function is called upon the occurrence
142 * of an interrupt.
143 * @function: Pointer to the sdio_func structure.
144 *
145 * Return: None.
146 */
rsi_handle_interrupt(struct sdio_func * function)147 static void rsi_handle_interrupt(struct sdio_func *function)
148 {
149 struct rsi_hw *adapter = sdio_get_drvdata(function);
150 struct rsi_91x_sdiodev *dev =
151 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
152
153 if (adapter->priv->fsm_state == FSM_FW_NOT_LOADED)
154 return;
155
156 dev->sdio_irq_task = current;
157 rsi_interrupt_handler(adapter);
158 dev->sdio_irq_task = NULL;
159 }
160
161 /**
162 * rsi_reset_card() - This function resets and re-initializes the card.
163 * @pfunction: Pointer to the sdio_func structure.
164 *
165 * Return: None.
166 */
rsi_reset_card(struct sdio_func * pfunction)167 static void rsi_reset_card(struct sdio_func *pfunction)
168 {
169 int ret = 0;
170 int err;
171 struct mmc_card *card = pfunction->card;
172 struct mmc_host *host = card->host;
173 u8 cmd52_resp;
174 u32 clock, resp, i;
175 u16 rca;
176
177 /* Reset 9110 chip */
178 ret = rsi_cmd52writebyte(pfunction->card,
179 SDIO_CCCR_ABORT,
180 (1 << 3));
181
182 /* Card will not send any response as it is getting reset immediately
183 * Hence expect a timeout status from host controller
184 */
185 if (ret != -ETIMEDOUT)
186 rsi_dbg(ERR_ZONE, "%s: Reset failed : %d\n", __func__, ret);
187
188 /* Wait for few milli seconds to get rid of residue charges if any */
189 msleep(20);
190
191 /* Initialize the SDIO card */
192 host->ios.chip_select = MMC_CS_DONTCARE;
193 host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
194 host->ios.power_mode = MMC_POWER_UP;
195 host->ios.bus_width = MMC_BUS_WIDTH_1;
196 host->ios.timing = MMC_TIMING_LEGACY;
197 host->ops->set_ios(host, &host->ios);
198
199 /*
200 * This delay should be sufficient to allow the power supply
201 * to reach the minimum voltage.
202 */
203 msleep(20);
204
205 host->ios.clock = host->f_min;
206 host->ios.power_mode = MMC_POWER_ON;
207 host->ops->set_ios(host, &host->ios);
208
209 /*
210 * This delay must be at least 74 clock sizes, or 1 ms, or the
211 * time required to reach a stable voltage.
212 */
213 msleep(20);
214
215 /* Issue CMD0. Goto idle state */
216 host->ios.chip_select = MMC_CS_HIGH;
217 host->ops->set_ios(host, &host->ios);
218 msleep(20);
219 err = rsi_issue_sdiocommand(pfunction,
220 MMC_GO_IDLE_STATE,
221 0,
222 (MMC_RSP_NONE | MMC_CMD_BC),
223 NULL);
224 host->ios.chip_select = MMC_CS_DONTCARE;
225 host->ops->set_ios(host, &host->ios);
226 msleep(20);
227 host->use_spi_crc = 0;
228
229 if (err)
230 rsi_dbg(ERR_ZONE, "%s: CMD0 failed : %d\n", __func__, err);
231
232 /* Issue CMD5, arg = 0 */
233 err = rsi_issue_sdiocommand(pfunction, SD_IO_SEND_OP_COND, 0,
234 (MMC_RSP_R4 | MMC_CMD_BCR), &resp);
235 if (err)
236 rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n",
237 __func__, err);
238 card->ocr = resp;
239 /* Issue CMD5, arg = ocr. Wait till card is ready */
240 for (i = 0; i < 100; i++) {
241 err = rsi_issue_sdiocommand(pfunction, SD_IO_SEND_OP_COND,
242 card->ocr,
243 (MMC_RSP_R4 | MMC_CMD_BCR), &resp);
244 if (err) {
245 rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n",
246 __func__, err);
247 break;
248 }
249
250 if (resp & MMC_CARD_BUSY)
251 break;
252 msleep(20);
253 }
254
255 if ((i == 100) || (err)) {
256 rsi_dbg(ERR_ZONE, "%s: card in not ready : %d %d\n",
257 __func__, i, err);
258 return;
259 }
260
261 /* Issue CMD3, get RCA */
262 err = rsi_issue_sdiocommand(pfunction,
263 SD_SEND_RELATIVE_ADDR,
264 0,
265 (MMC_RSP_R6 | MMC_CMD_BCR),
266 &resp);
267 if (err) {
268 rsi_dbg(ERR_ZONE, "%s: CMD3 failed : %d\n", __func__, err);
269 return;
270 }
271 rca = resp >> 16;
272 host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
273 host->ops->set_ios(host, &host->ios);
274
275 /* Issue CMD7, select card */
276 err = rsi_issue_sdiocommand(pfunction,
277 MMC_SELECT_CARD,
278 (rca << 16),
279 (MMC_RSP_R1 | MMC_CMD_AC),
280 NULL);
281 if (err) {
282 rsi_dbg(ERR_ZONE, "%s: CMD7 failed : %d\n", __func__, err);
283 return;
284 }
285
286 /* Enable high speed */
287 if (card->host->caps & MMC_CAP_SD_HIGHSPEED) {
288 rsi_dbg(ERR_ZONE, "%s: Set high speed mode\n", __func__);
289 err = rsi_cmd52readbyte(card, SDIO_CCCR_SPEED, &cmd52_resp);
290 if (err) {
291 rsi_dbg(ERR_ZONE, "%s: CCCR speed reg read failed: %d\n",
292 __func__, err);
293 } else {
294 err = rsi_cmd52writebyte(card,
295 SDIO_CCCR_SPEED,
296 (cmd52_resp | SDIO_SPEED_EHS));
297 if (err) {
298 rsi_dbg(ERR_ZONE,
299 "%s: CCR speed regwrite failed %d\n",
300 __func__, err);
301 return;
302 }
303 host->ios.timing = MMC_TIMING_SD_HS;
304 host->ops->set_ios(host, &host->ios);
305 }
306 }
307
308 /* Set clock */
309 if (mmc_card_hs(card))
310 clock = 50000000;
311 else
312 clock = card->cis.max_dtr;
313
314 if (clock > host->f_max)
315 clock = host->f_max;
316
317 host->ios.clock = clock;
318 host->ops->set_ios(host, &host->ios);
319
320 if (card->host->caps & MMC_CAP_4_BIT_DATA) {
321 /* CMD52: Set bus width & disable card detect resistor */
322 err = rsi_cmd52writebyte(card,
323 SDIO_CCCR_IF,
324 (SDIO_BUS_CD_DISABLE |
325 SDIO_BUS_WIDTH_4BIT));
326 if (err) {
327 rsi_dbg(ERR_ZONE, "%s: Set bus mode failed : %d\n",
328 __func__, err);
329 return;
330 }
331 host->ios.bus_width = MMC_BUS_WIDTH_4;
332 host->ops->set_ios(host, &host->ios);
333 }
334 }
335
336 /**
337 * rsi_setclock() - This function sets the clock frequency.
338 * @adapter: Pointer to the adapter structure.
339 * @freq: Clock frequency.
340 *
341 * Return: None.
342 */
rsi_setclock(struct rsi_hw * adapter,u32 freq)343 static void rsi_setclock(struct rsi_hw *adapter, u32 freq)
344 {
345 struct rsi_91x_sdiodev *dev =
346 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
347 struct mmc_host *host = dev->pfunction->card->host;
348 u32 clock;
349
350 clock = freq * 1000;
351 if (clock > host->f_max)
352 clock = host->f_max;
353 host->ios.clock = clock;
354 host->ops->set_ios(host, &host->ios);
355 }
356
357 /**
358 * rsi_setblocklength() - This function sets the host block length.
359 * @adapter: Pointer to the adapter structure.
360 * @length: Block length to be set.
361 *
362 * Return: status: 0 on success, -1 on failure.
363 */
rsi_setblocklength(struct rsi_hw * adapter,u32 length)364 static int rsi_setblocklength(struct rsi_hw *adapter, u32 length)
365 {
366 struct rsi_91x_sdiodev *dev =
367 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
368 int status;
369 rsi_dbg(INIT_ZONE, "%s: Setting the block length\n", __func__);
370
371 status = sdio_set_block_size(dev->pfunction, length);
372 dev->pfunction->max_blksize = 256;
373 adapter->block_size = dev->pfunction->max_blksize;
374
375 rsi_dbg(INFO_ZONE,
376 "%s: Operational blk length is %d\n", __func__, length);
377 return status;
378 }
379
380 /**
381 * rsi_setupcard() - This function queries and sets the card's features.
382 * @adapter: Pointer to the adapter structure.
383 *
384 * Return: status: 0 on success, -1 on failure.
385 */
rsi_setupcard(struct rsi_hw * adapter)386 static int rsi_setupcard(struct rsi_hw *adapter)
387 {
388 struct rsi_91x_sdiodev *dev =
389 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
390 int status = 0;
391
392 rsi_setclock(adapter, 50000);
393
394 dev->tx_blk_size = 256;
395 status = rsi_setblocklength(adapter, dev->tx_blk_size);
396 if (status)
397 rsi_dbg(ERR_ZONE,
398 "%s: Unable to set block length\n", __func__);
399 return status;
400 }
401
402 /**
403 * rsi_sdio_read_register() - This function reads one byte of information
404 * from a register.
405 * @adapter: Pointer to the adapter structure.
406 * @addr: Address of the register.
407 * @data: Pointer to the data that stores the data read.
408 *
409 * Return: 0 on success, -1 on failure.
410 */
rsi_sdio_read_register(struct rsi_hw * adapter,u32 addr,u8 * data)411 int rsi_sdio_read_register(struct rsi_hw *adapter,
412 u32 addr,
413 u8 *data)
414 {
415 struct rsi_91x_sdiodev *dev =
416 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
417 u8 fun_num = 0;
418 int status;
419
420 if (likely(dev->sdio_irq_task != current))
421 sdio_claim_host(dev->pfunction);
422
423 if (fun_num == 0)
424 *data = sdio_f0_readb(dev->pfunction, addr, &status);
425 else
426 *data = sdio_readb(dev->pfunction, addr, &status);
427
428 if (likely(dev->sdio_irq_task != current))
429 sdio_release_host(dev->pfunction);
430
431 return status;
432 }
433
434 /**
435 * rsi_sdio_write_register() - This function writes one byte of information
436 * into a register.
437 * @adapter: Pointer to the adapter structure.
438 * @function: Function Number.
439 * @addr: Address of the register.
440 * @data: Pointer to the data tha has to be written.
441 *
442 * Return: 0 on success, -1 on failure.
443 */
rsi_sdio_write_register(struct rsi_hw * adapter,u8 function,u32 addr,u8 * data)444 int rsi_sdio_write_register(struct rsi_hw *adapter,
445 u8 function,
446 u32 addr,
447 u8 *data)
448 {
449 struct rsi_91x_sdiodev *dev =
450 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
451 int status = 0;
452
453 if (likely(dev->sdio_irq_task != current))
454 sdio_claim_host(dev->pfunction);
455
456 if (function == 0)
457 sdio_f0_writeb(dev->pfunction, *data, addr, &status);
458 else
459 sdio_writeb(dev->pfunction, *data, addr, &status);
460
461 if (likely(dev->sdio_irq_task != current))
462 sdio_release_host(dev->pfunction);
463
464 return status;
465 }
466
467 /**
468 * rsi_sdio_ack_intr() - This function acks the interrupt received.
469 * @adapter: Pointer to the adapter structure.
470 * @int_bit: Interrupt bit to write into register.
471 *
472 * Return: None.
473 */
rsi_sdio_ack_intr(struct rsi_hw * adapter,u8 int_bit)474 void rsi_sdio_ack_intr(struct rsi_hw *adapter, u8 int_bit)
475 {
476 int status;
477 status = rsi_sdio_write_register(adapter,
478 1,
479 (SDIO_FUN1_INTR_CLR_REG |
480 RSI_SD_REQUEST_MASTER),
481 &int_bit);
482 if (status)
483 rsi_dbg(ERR_ZONE, "%s: unable to send ack\n", __func__);
484 }
485
486
487
488 /**
489 * rsi_sdio_read_register_multiple() - This function read multiple bytes of
490 * information from the SD card.
491 * @adapter: Pointer to the adapter structure.
492 * @addr: Address of the register.
493 * @count: Number of multiple bytes to be read.
494 * @data: Pointer to the read data.
495 *
496 * Return: 0 on success, -1 on failure.
497 */
rsi_sdio_read_register_multiple(struct rsi_hw * adapter,u32 addr,u8 * data,u16 count)498 static int rsi_sdio_read_register_multiple(struct rsi_hw *adapter,
499 u32 addr,
500 u8 *data,
501 u16 count)
502 {
503 struct rsi_91x_sdiodev *dev =
504 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
505 u32 status;
506
507 if (likely(dev->sdio_irq_task != current))
508 sdio_claim_host(dev->pfunction);
509
510 status = sdio_readsb(dev->pfunction, data, addr, count);
511
512 if (likely(dev->sdio_irq_task != current))
513 sdio_release_host(dev->pfunction);
514
515 if (status != 0)
516 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 read failed\n", __func__);
517 return status;
518 }
519
520 /**
521 * rsi_sdio_write_register_multiple() - This function writes multiple bytes of
522 * information to the SD card.
523 * @adapter: Pointer to the adapter structure.
524 * @addr: Address of the register.
525 * @data: Pointer to the data that has to be written.
526 * @count: Number of multiple bytes to be written.
527 *
528 * Return: 0 on success, -1 on failure.
529 */
rsi_sdio_write_register_multiple(struct rsi_hw * adapter,u32 addr,u8 * data,u16 count)530 int rsi_sdio_write_register_multiple(struct rsi_hw *adapter,
531 u32 addr,
532 u8 *data,
533 u16 count)
534 {
535 struct rsi_91x_sdiodev *dev =
536 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
537 int status;
538
539 if (dev->write_fail > 1) {
540 rsi_dbg(ERR_ZONE, "%s: Stopping card writes\n", __func__);
541 return 0;
542 } else if (dev->write_fail == 1) {
543 /**
544 * Assuming it is a CRC failure, we want to allow another
545 * card write
546 */
547 rsi_dbg(ERR_ZONE, "%s: Continue card writes\n", __func__);
548 dev->write_fail++;
549 }
550
551 if (likely(dev->sdio_irq_task != current))
552 sdio_claim_host(dev->pfunction);
553
554 status = sdio_writesb(dev->pfunction, addr, data, count);
555
556 if (likely(dev->sdio_irq_task != current))
557 sdio_release_host(dev->pfunction);
558
559 if (status) {
560 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 write failed %d\n",
561 __func__, status);
562 dev->write_fail = 2;
563 } else {
564 memcpy(dev->prev_desc, data, FRAME_DESC_SZ);
565 }
566 return status;
567 }
568
rsi_sdio_load_data_master_write(struct rsi_hw * adapter,u32 base_address,u32 instructions_sz,u16 block_size,u8 * ta_firmware)569 static int rsi_sdio_load_data_master_write(struct rsi_hw *adapter,
570 u32 base_address,
571 u32 instructions_sz,
572 u16 block_size,
573 u8 *ta_firmware)
574 {
575 u32 num_blocks, offset, i;
576 u16 msb_address, lsb_address;
577 u8 *temp_buf;
578 int status;
579
580 num_blocks = instructions_sz / block_size;
581 msb_address = base_address >> 16;
582
583 rsi_dbg(INFO_ZONE, "ins_size: %d, num_blocks: %d\n",
584 instructions_sz, num_blocks);
585
586 temp_buf = kmalloc(block_size, GFP_KERNEL);
587 if (!temp_buf)
588 return -ENOMEM;
589
590 /* Loading DM ms word in the sdio slave */
591 status = rsi_sdio_master_access_msword(adapter, msb_address);
592 if (status < 0) {
593 rsi_dbg(ERR_ZONE, "%s: Unable to set ms word reg\n", __func__);
594 goto out_free;
595 }
596
597 for (offset = 0, i = 0; i < num_blocks; i++, offset += block_size) {
598 memcpy(temp_buf, ta_firmware + offset, block_size);
599 lsb_address = (u16)base_address;
600 status = rsi_sdio_write_register_multiple
601 (adapter,
602 lsb_address | RSI_SD_REQUEST_MASTER,
603 temp_buf, block_size);
604 if (status < 0) {
605 rsi_dbg(ERR_ZONE, "%s: failed to write\n", __func__);
606 goto out_free;
607 }
608 rsi_dbg(INFO_ZONE, "%s: loading block: %d\n", __func__, i);
609 base_address += block_size;
610
611 if ((base_address >> 16) != msb_address) {
612 msb_address += 1;
613
614 /* Loading DM ms word in the sdio slave */
615 status = rsi_sdio_master_access_msword(adapter,
616 msb_address);
617 if (status < 0) {
618 rsi_dbg(ERR_ZONE,
619 "%s: Unable to set ms word reg\n",
620 __func__);
621 goto out_free;
622 }
623 }
624 }
625
626 if (instructions_sz % block_size) {
627 memset(temp_buf, 0, block_size);
628 memcpy(temp_buf, ta_firmware + offset,
629 instructions_sz % block_size);
630 lsb_address = (u16)base_address;
631 status = rsi_sdio_write_register_multiple
632 (adapter,
633 lsb_address | RSI_SD_REQUEST_MASTER,
634 temp_buf,
635 instructions_sz % block_size);
636 if (status < 0)
637 goto out_free;
638 rsi_dbg(INFO_ZONE,
639 "Written Last Block in Address 0x%x Successfully\n",
640 offset | RSI_SD_REQUEST_MASTER);
641 }
642
643 status = 0;
644 out_free:
645 kfree(temp_buf);
646 return status;
647 }
648
649 #define FLASH_SIZE_ADDR 0x04000016
rsi_sdio_master_reg_read(struct rsi_hw * adapter,u32 addr,u32 * read_buf,u16 size)650 static int rsi_sdio_master_reg_read(struct rsi_hw *adapter, u32 addr,
651 u32 *read_buf, u16 size)
652 {
653 u32 addr_on_bus, *data;
654 u16 ms_addr;
655 int status;
656
657 data = kzalloc(RSI_MASTER_REG_BUF_SIZE, GFP_KERNEL);
658 if (!data)
659 return -ENOMEM;
660
661 ms_addr = (addr >> 16);
662 status = rsi_sdio_master_access_msword(adapter, ms_addr);
663 if (status < 0) {
664 rsi_dbg(ERR_ZONE,
665 "%s: Unable to set ms word to common reg\n",
666 __func__);
667 goto err;
668 }
669 addr &= 0xFFFF;
670
671 addr_on_bus = (addr & 0xFF000000);
672 if ((addr_on_bus == (FLASH_SIZE_ADDR & 0xFF000000)) ||
673 (addr_on_bus == 0x0))
674 addr_on_bus = (addr & ~(0x3));
675 else
676 addr_on_bus = addr;
677
678 /* Bring TA out of reset */
679 status = rsi_sdio_read_register_multiple
680 (adapter,
681 (addr_on_bus | RSI_SD_REQUEST_MASTER),
682 (u8 *)data, 4);
683 if (status < 0) {
684 rsi_dbg(ERR_ZONE, "%s: AHB register read failed\n", __func__);
685 goto err;
686 }
687 if (size == 2) {
688 if ((addr & 0x3) == 0)
689 *read_buf = *data;
690 else
691 *read_buf = (*data >> 16);
692 *read_buf = (*read_buf & 0xFFFF);
693 } else if (size == 1) {
694 if ((addr & 0x3) == 0)
695 *read_buf = *data;
696 else if ((addr & 0x3) == 1)
697 *read_buf = (*data >> 8);
698 else if ((addr & 0x3) == 2)
699 *read_buf = (*data >> 16);
700 else
701 *read_buf = (*data >> 24);
702 *read_buf = (*read_buf & 0xFF);
703 } else {
704 *read_buf = *data;
705 }
706
707 err:
708 kfree(data);
709 return status;
710 }
711
rsi_sdio_master_reg_write(struct rsi_hw * adapter,unsigned long addr,unsigned long data,u16 size)712 static int rsi_sdio_master_reg_write(struct rsi_hw *adapter,
713 unsigned long addr,
714 unsigned long data, u16 size)
715 {
716 unsigned long *data_aligned;
717 int status;
718
719 data_aligned = kzalloc(RSI_MASTER_REG_BUF_SIZE, GFP_KERNEL);
720 if (!data_aligned)
721 return -ENOMEM;
722
723 if (size == 2) {
724 *data_aligned = ((data << 16) | (data & 0xFFFF));
725 } else if (size == 1) {
726 u32 temp_data = data & 0xFF;
727
728 *data_aligned = ((temp_data << 24) | (temp_data << 16) |
729 (temp_data << 8) | temp_data);
730 } else {
731 *data_aligned = data;
732 }
733 size = 4;
734
735 status = rsi_sdio_master_access_msword(adapter, (addr >> 16));
736 if (status < 0) {
737 rsi_dbg(ERR_ZONE,
738 "%s: Unable to set ms word to common reg\n",
739 __func__);
740 kfree(data_aligned);
741 return -EIO;
742 }
743 addr = addr & 0xFFFF;
744
745 /* Bring TA out of reset */
746 status = rsi_sdio_write_register_multiple
747 (adapter,
748 (addr | RSI_SD_REQUEST_MASTER),
749 (u8 *)data_aligned, size);
750 if (status < 0)
751 rsi_dbg(ERR_ZONE,
752 "%s: Unable to do AHB reg write\n", __func__);
753
754 kfree(data_aligned);
755 return status;
756 }
757
758 /**
759 * rsi_sdio_host_intf_write_pkt() - This function writes the packet to device.
760 * @adapter: Pointer to the adapter structure.
761 * @pkt: Pointer to the data to be written on to the device.
762 * @len: length of the data to be written on to the device.
763 *
764 * Return: 0 on success, -1 on failure.
765 */
rsi_sdio_host_intf_write_pkt(struct rsi_hw * adapter,u8 * pkt,u32 len)766 static int rsi_sdio_host_intf_write_pkt(struct rsi_hw *adapter,
767 u8 *pkt,
768 u32 len)
769 {
770 struct rsi_91x_sdiodev *dev =
771 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
772 u32 block_size = dev->tx_blk_size;
773 u32 num_blocks, address, length;
774 u32 queueno;
775 int status;
776
777 queueno = ((pkt[1] >> 4) & 0xf);
778 if (queueno == RSI_BT_MGMT_Q || queueno == RSI_BT_DATA_Q)
779 queueno = RSI_BT_Q;
780
781 num_blocks = len / block_size;
782
783 if (len % block_size)
784 num_blocks++;
785
786 address = (num_blocks * block_size | (queueno << 12));
787 length = num_blocks * block_size;
788
789 status = rsi_sdio_write_register_multiple(adapter,
790 address,
791 (u8 *)pkt,
792 length);
793 if (status)
794 rsi_dbg(ERR_ZONE, "%s: Unable to write onto the card: %d\n",
795 __func__, status);
796 rsi_dbg(DATA_TX_ZONE, "%s: Successfully written onto card\n", __func__);
797 return status;
798 }
799
800 /**
801 * rsi_sdio_host_intf_read_pkt() - This function reads the packet
802 * from the device.
803 * @adapter: Pointer to the adapter data structure.
804 * @pkt: Pointer to the packet data to be read from the the device.
805 * @length: Length of the data to be read from the device.
806 *
807 * Return: 0 on success, -1 on failure.
808 */
rsi_sdio_host_intf_read_pkt(struct rsi_hw * adapter,u8 * pkt,u32 length)809 int rsi_sdio_host_intf_read_pkt(struct rsi_hw *adapter,
810 u8 *pkt,
811 u32 length)
812 {
813 int status = -EINVAL;
814
815 if (!length) {
816 rsi_dbg(ERR_ZONE, "%s: Pkt size is zero\n", __func__);
817 return status;
818 }
819
820 status = rsi_sdio_read_register_multiple(adapter,
821 length,
822 (u8 *)pkt,
823 length); /*num of bytes*/
824
825 if (status)
826 rsi_dbg(ERR_ZONE, "%s: Failed to read frame: %d\n", __func__,
827 status);
828 return status;
829 }
830
831 /**
832 * rsi_init_sdio_interface() - This function does init specific to SDIO.
833 *
834 * @adapter: Pointer to the adapter data structure.
835 * @pfunction: Pointer to the sdio_func structure.
836 *
837 * Return: 0 on success, -1 on failure.
838 */
rsi_init_sdio_interface(struct rsi_hw * adapter,struct sdio_func * pfunction)839 static int rsi_init_sdio_interface(struct rsi_hw *adapter,
840 struct sdio_func *pfunction)
841 {
842 struct rsi_91x_sdiodev *rsi_91x_dev;
843 int status;
844
845 rsi_91x_dev = kzalloc(sizeof(*rsi_91x_dev), GFP_KERNEL);
846 if (!rsi_91x_dev)
847 return -ENOMEM;
848
849 adapter->rsi_dev = rsi_91x_dev;
850
851 sdio_claim_host(pfunction);
852
853 pfunction->enable_timeout = 100;
854 status = sdio_enable_func(pfunction);
855 if (status) {
856 rsi_dbg(ERR_ZONE, "%s: Failed to enable interface\n", __func__);
857 sdio_release_host(pfunction);
858 return status;
859 }
860
861 rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__);
862
863 rsi_91x_dev->pfunction = pfunction;
864 adapter->device = &pfunction->dev;
865
866 sdio_set_drvdata(pfunction, adapter);
867
868 status = rsi_setupcard(adapter);
869 if (status) {
870 rsi_dbg(ERR_ZONE, "%s: Failed to setup card\n", __func__);
871 goto fail;
872 }
873
874 rsi_dbg(INIT_ZONE, "%s: Setup card successfully\n", __func__);
875
876 status = rsi_init_sdio_slave_regs(adapter);
877 if (status) {
878 rsi_dbg(ERR_ZONE, "%s: Failed to init slave regs\n", __func__);
879 goto fail;
880 }
881 sdio_release_host(pfunction);
882
883 adapter->determine_event_timeout = rsi_sdio_determine_event_timeout;
884 adapter->check_hw_queue_status = rsi_sdio_check_buffer_status;
885
886 #ifdef CONFIG_RSI_DEBUGFS
887 adapter->num_debugfs_entries = MAX_DEBUGFS_ENTRIES;
888 #endif
889 return 0;
890 fail:
891 sdio_disable_func(pfunction);
892 sdio_release_host(pfunction);
893 return status;
894 }
895
rsi_sdio_reinit_device(struct rsi_hw * adapter)896 static int rsi_sdio_reinit_device(struct rsi_hw *adapter)
897 {
898 struct rsi_91x_sdiodev *sdev = adapter->rsi_dev;
899 struct sdio_func *pfunction = sdev->pfunction;
900 int ii;
901
902 for (ii = 0; ii < NUM_SOFT_QUEUES; ii++)
903 skb_queue_purge(&adapter->priv->tx_queue[ii]);
904
905 /* Initialize device again */
906 sdio_claim_host(pfunction);
907
908 sdio_release_irq(pfunction);
909 rsi_reset_card(pfunction);
910
911 sdio_enable_func(pfunction);
912 rsi_setupcard(adapter);
913 rsi_init_sdio_slave_regs(adapter);
914 sdio_claim_irq(pfunction, rsi_handle_interrupt);
915 rsi_hal_device_init(adapter);
916
917 sdio_release_host(pfunction);
918
919 return 0;
920 }
921
rsi_sdio_ta_reset(struct rsi_hw * adapter)922 static int rsi_sdio_ta_reset(struct rsi_hw *adapter)
923 {
924 int status;
925 u32 addr;
926 u8 *data;
927
928 data = kzalloc(RSI_9116_REG_SIZE, GFP_KERNEL);
929 if (!data)
930 return -ENOMEM;
931
932 status = rsi_sdio_master_access_msword(adapter, TA_BASE_ADDR);
933 if (status < 0) {
934 rsi_dbg(ERR_ZONE,
935 "Unable to set ms word to common reg\n");
936 goto err;
937 }
938
939 rsi_dbg(INIT_ZONE, "%s: Bring TA out of reset\n", __func__);
940 put_unaligned_le32(TA_HOLD_THREAD_VALUE, data);
941 addr = TA_HOLD_THREAD_REG | RSI_SD_REQUEST_MASTER;
942 status = rsi_sdio_write_register_multiple(adapter, addr,
943 (u8 *)data,
944 RSI_9116_REG_SIZE);
945 if (status < 0) {
946 rsi_dbg(ERR_ZONE, "Unable to hold TA threads\n");
947 goto err;
948 }
949
950 put_unaligned_le32(TA_SOFT_RST_CLR, data);
951 addr = TA_SOFT_RESET_REG | RSI_SD_REQUEST_MASTER;
952 status = rsi_sdio_write_register_multiple(adapter, addr,
953 (u8 *)data,
954 RSI_9116_REG_SIZE);
955 if (status < 0) {
956 rsi_dbg(ERR_ZONE, "Unable to get TA out of reset\n");
957 goto err;
958 }
959
960 put_unaligned_le32(TA_PC_ZERO, data);
961 addr = TA_TH0_PC_REG | RSI_SD_REQUEST_MASTER;
962 status = rsi_sdio_write_register_multiple(adapter, addr,
963 (u8 *)data,
964 RSI_9116_REG_SIZE);
965 if (status < 0) {
966 rsi_dbg(ERR_ZONE, "Unable to Reset TA PC value\n");
967 status = -EINVAL;
968 goto err;
969 }
970
971 put_unaligned_le32(TA_RELEASE_THREAD_VALUE, data);
972 addr = TA_RELEASE_THREAD_REG | RSI_SD_REQUEST_MASTER;
973 status = rsi_sdio_write_register_multiple(adapter, addr,
974 (u8 *)data,
975 RSI_9116_REG_SIZE);
976 if (status < 0) {
977 rsi_dbg(ERR_ZONE, "Unable to release TA threads\n");
978 goto err;
979 }
980
981 status = rsi_sdio_master_access_msword(adapter, MISC_CFG_BASE_ADDR);
982 if (status < 0) {
983 rsi_dbg(ERR_ZONE, "Unable to set ms word to common reg\n");
984 goto err;
985 }
986 rsi_dbg(INIT_ZONE, "***** TA Reset done *****\n");
987
988 err:
989 kfree(data);
990 return status;
991 }
992
993 static struct rsi_host_intf_ops sdio_host_intf_ops = {
994 .write_pkt = rsi_sdio_host_intf_write_pkt,
995 .read_pkt = rsi_sdio_host_intf_read_pkt,
996 .master_access_msword = rsi_sdio_master_access_msword,
997 .read_reg_multiple = rsi_sdio_read_register_multiple,
998 .write_reg_multiple = rsi_sdio_write_register_multiple,
999 .master_reg_read = rsi_sdio_master_reg_read,
1000 .master_reg_write = rsi_sdio_master_reg_write,
1001 .load_data_master_write = rsi_sdio_load_data_master_write,
1002 .reinit_device = rsi_sdio_reinit_device,
1003 .ta_reset = rsi_sdio_ta_reset,
1004 };
1005
1006 /**
1007 * rsi_probe() - This function is called by kernel when the driver provided
1008 * Vendor and device IDs are matched. All the initialization
1009 * work is done here.
1010 * @pfunction: Pointer to the sdio_func structure.
1011 * @id: Pointer to sdio_device_id structure.
1012 *
1013 * Return: 0 on success, 1 on failure.
1014 */
rsi_probe(struct sdio_func * pfunction,const struct sdio_device_id * id)1015 static int rsi_probe(struct sdio_func *pfunction,
1016 const struct sdio_device_id *id)
1017 {
1018 struct rsi_hw *adapter;
1019 struct rsi_91x_sdiodev *sdev;
1020 int status = -EINVAL;
1021
1022 rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__);
1023
1024 adapter = rsi_91x_init(dev_oper_mode);
1025 if (!adapter) {
1026 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n",
1027 __func__);
1028 return -EINVAL;
1029 }
1030 adapter->rsi_host_intf = RSI_HOST_INTF_SDIO;
1031 adapter->host_intf_ops = &sdio_host_intf_ops;
1032
1033 if (rsi_init_sdio_interface(adapter, pfunction)) {
1034 rsi_dbg(ERR_ZONE, "%s: Failed to init sdio interface\n",
1035 __func__);
1036 status = -EIO;
1037 goto fail_free_adapter;
1038 }
1039
1040 if (pfunction->device == SDIO_DEVICE_ID_RSI_9113) {
1041 rsi_dbg(ERR_ZONE, "%s: 9113 module detected\n", __func__);
1042 adapter->device_model = RSI_DEV_9113;
1043 } else if (pfunction->device == SDIO_DEVICE_ID_RSI_9116) {
1044 rsi_dbg(ERR_ZONE, "%s: 9116 module detected\n", __func__);
1045 adapter->device_model = RSI_DEV_9116;
1046 } else {
1047 rsi_dbg(ERR_ZONE,
1048 "%s: Unsupported RSI device id 0x%x\n", __func__,
1049 pfunction->device);
1050 goto fail_free_adapter;
1051 }
1052
1053 sdev = (struct rsi_91x_sdiodev *)adapter->rsi_dev;
1054 rsi_init_event(&sdev->rx_thread.event);
1055 status = rsi_create_kthread(adapter->priv, &sdev->rx_thread,
1056 rsi_sdio_rx_thread, "SDIO-RX-Thread");
1057 if (status) {
1058 rsi_dbg(ERR_ZONE, "%s: Unable to init rx thrd\n", __func__);
1059 goto fail_kill_thread;
1060 }
1061 skb_queue_head_init(&sdev->rx_q.head);
1062 sdev->rx_q.num_rx_pkts = 0;
1063
1064 sdio_claim_host(pfunction);
1065 if (sdio_claim_irq(pfunction, rsi_handle_interrupt)) {
1066 rsi_dbg(ERR_ZONE, "%s: Failed to request IRQ\n", __func__);
1067 sdio_release_host(pfunction);
1068 status = -EIO;
1069 goto fail_claim_irq;
1070 }
1071 sdio_release_host(pfunction);
1072 rsi_dbg(INIT_ZONE, "%s: Registered Interrupt handler\n", __func__);
1073
1074 if (rsi_hal_device_init(adapter)) {
1075 rsi_dbg(ERR_ZONE, "%s: Failed in device init\n", __func__);
1076 status = -EINVAL;
1077 goto fail_dev_init;
1078 }
1079 rsi_dbg(INFO_ZONE, "===> RSI Device Init Done <===\n");
1080
1081 if (rsi_sdio_master_access_msword(adapter, MISC_CFG_BASE_ADDR)) {
1082 rsi_dbg(ERR_ZONE, "%s: Unable to set ms word reg\n", __func__);
1083 status = -EIO;
1084 goto fail_dev_init;
1085 }
1086
1087 adapter->priv->hibernate_resume = false;
1088 adapter->priv->reinit_hw = false;
1089 return 0;
1090
1091 fail_dev_init:
1092 sdio_claim_host(pfunction);
1093 sdio_release_irq(pfunction);
1094 sdio_release_host(pfunction);
1095 fail_claim_irq:
1096 rsi_kill_thread(&sdev->rx_thread);
1097 fail_kill_thread:
1098 sdio_claim_host(pfunction);
1099 sdio_disable_func(pfunction);
1100 sdio_release_host(pfunction);
1101 fail_free_adapter:
1102 rsi_91x_deinit(adapter);
1103 rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__);
1104 return status;
1105 }
1106
ulp_read_write(struct rsi_hw * adapter,u16 addr,u32 data,u16 len_in_bits)1107 static void ulp_read_write(struct rsi_hw *adapter, u16 addr, u32 data,
1108 u16 len_in_bits)
1109 {
1110 rsi_sdio_master_reg_write(adapter, RSI_GSPI_DATA_REG1,
1111 ((addr << 6) | ((data >> 16) & 0xffff)), 2);
1112 rsi_sdio_master_reg_write(adapter, RSI_GSPI_DATA_REG0,
1113 (data & 0xffff), 2);
1114 rsi_sdio_master_reg_write(adapter, RSI_GSPI_CTRL_REG0,
1115 RSI_GSPI_CTRL_REG0_VALUE, 2);
1116 rsi_sdio_master_reg_write(adapter, RSI_GSPI_CTRL_REG1,
1117 ((len_in_bits - 1) | RSI_GSPI_TRIG), 2);
1118 msleep(20);
1119 }
1120
1121 /*This function resets and re-initializes the chip.*/
rsi_reset_chip(struct rsi_hw * adapter)1122 static void rsi_reset_chip(struct rsi_hw *adapter)
1123 {
1124 u8 *data;
1125 u8 sdio_interrupt_status = 0;
1126 u8 request = 1;
1127 int ret;
1128
1129 data = kzalloc(sizeof(u32), GFP_KERNEL);
1130 if (!data)
1131 return;
1132
1133 rsi_dbg(INFO_ZONE, "Writing disable to wakeup register\n");
1134 ret = rsi_sdio_write_register(adapter, 0, SDIO_WAKEUP_REG, &request);
1135 if (ret < 0) {
1136 rsi_dbg(ERR_ZONE,
1137 "%s: Failed to write SDIO wakeup register\n", __func__);
1138 goto err;
1139 }
1140 msleep(20);
1141 ret = rsi_sdio_read_register(adapter, RSI_FN1_INT_REGISTER,
1142 &sdio_interrupt_status);
1143 if (ret < 0) {
1144 rsi_dbg(ERR_ZONE, "%s: Failed to Read Intr Status Register\n",
1145 __func__);
1146 goto err;
1147 }
1148 rsi_dbg(INFO_ZONE, "%s: Intr Status Register value = %d\n",
1149 __func__, sdio_interrupt_status);
1150
1151 /* Put Thread-Arch processor on hold */
1152 if (rsi_sdio_master_access_msword(adapter, TA_BASE_ADDR)) {
1153 rsi_dbg(ERR_ZONE,
1154 "%s: Unable to set ms word to common reg\n",
1155 __func__);
1156 goto err;
1157 }
1158
1159 put_unaligned_le32(TA_HOLD_THREAD_VALUE, data);
1160 if (rsi_sdio_write_register_multiple(adapter, TA_HOLD_THREAD_REG |
1161 RSI_SD_REQUEST_MASTER,
1162 data, 4)) {
1163 rsi_dbg(ERR_ZONE,
1164 "%s: Unable to hold Thread-Arch processor threads\n",
1165 __func__);
1166 goto err;
1167 }
1168
1169 /* This msleep will ensure Thread-Arch processor to go to hold
1170 * and any pending dma transfers to rf spi in device to finish.
1171 */
1172 msleep(100);
1173 if (adapter->device_model != RSI_DEV_9116) {
1174 ulp_read_write(adapter, RSI_ULP_RESET_REG, RSI_ULP_WRITE_0, 32);
1175 ulp_read_write(adapter,
1176 RSI_WATCH_DOG_TIMER_1, RSI_ULP_WRITE_2, 32);
1177 ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_2, RSI_ULP_WRITE_0,
1178 32);
1179 ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_1,
1180 RSI_ULP_WRITE_50, 32);
1181 ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_2,
1182 RSI_ULP_WRITE_0, 32);
1183 ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_ENABLE,
1184 RSI_ULP_TIMER_ENABLE, 32);
1185 } else {
1186 if ((rsi_sdio_master_reg_write(adapter,
1187 NWP_WWD_INTERRUPT_TIMER,
1188 NWP_WWD_INT_TIMER_CLKS,
1189 RSI_9116_REG_SIZE)) < 0) {
1190 rsi_dbg(ERR_ZONE, "Failed to write to intr timer\n");
1191 }
1192 if ((rsi_sdio_master_reg_write(adapter,
1193 NWP_WWD_SYSTEM_RESET_TIMER,
1194 NWP_WWD_SYS_RESET_TIMER_CLKS,
1195 RSI_9116_REG_SIZE)) < 0) {
1196 rsi_dbg(ERR_ZONE,
1197 "Failed to write to system reset timer\n");
1198 }
1199 if ((rsi_sdio_master_reg_write(adapter,
1200 NWP_WWD_MODE_AND_RSTART,
1201 NWP_WWD_TIMER_DISABLE,
1202 RSI_9116_REG_SIZE)) < 0) {
1203 rsi_dbg(ERR_ZONE,
1204 "Failed to write to mode and restart\n");
1205 }
1206 rsi_dbg(ERR_ZONE, "***** Watch Dog Reset Successful *****\n");
1207 }
1208 /* This msleep will be sufficient for the ulp
1209 * read write operations to complete for chip reset.
1210 */
1211 msleep(500);
1212 err:
1213 kfree(data);
1214 return;
1215 }
1216
1217 /**
1218 * rsi_disconnect() - This function performs the reverse of the probe function.
1219 * @pfunction: Pointer to the sdio_func structure.
1220 *
1221 * Return: void.
1222 */
rsi_disconnect(struct sdio_func * pfunction)1223 static void rsi_disconnect(struct sdio_func *pfunction)
1224 {
1225 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1226 struct rsi_91x_sdiodev *dev;
1227
1228 if (!adapter)
1229 return;
1230
1231 dev = (struct rsi_91x_sdiodev *)adapter->rsi_dev;
1232
1233 rsi_kill_thread(&dev->rx_thread);
1234 sdio_claim_host(pfunction);
1235 sdio_release_irq(pfunction);
1236 sdio_release_host(pfunction);
1237 mdelay(10);
1238
1239 rsi_mac80211_detach(adapter);
1240 mdelay(10);
1241
1242 if (IS_ENABLED(CONFIG_RSI_COEX) && adapter->priv->coex_mode > 1 &&
1243 adapter->priv->bt_adapter) {
1244 rsi_bt_ops.detach(adapter->priv->bt_adapter);
1245 adapter->priv->bt_adapter = NULL;
1246 }
1247
1248 /* Reset Chip */
1249 rsi_reset_chip(adapter);
1250
1251 /* Resetting to take care of the case, where-in driver is re-loaded */
1252 sdio_claim_host(pfunction);
1253 rsi_reset_card(pfunction);
1254 sdio_disable_func(pfunction);
1255 sdio_release_host(pfunction);
1256 dev->write_fail = 2;
1257 rsi_91x_deinit(adapter);
1258 rsi_dbg(ERR_ZONE, "##### RSI SDIO device disconnected #####\n");
1259
1260 }
1261
1262 #ifdef CONFIG_PM
rsi_set_sdio_pm_caps(struct rsi_hw * adapter)1263 static int rsi_set_sdio_pm_caps(struct rsi_hw *adapter)
1264 {
1265 struct rsi_91x_sdiodev *dev =
1266 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
1267 struct sdio_func *func = dev->pfunction;
1268 int ret;
1269
1270 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1271 if (ret)
1272 rsi_dbg(ERR_ZONE, "Set sdio keep pwr flag failed: %d\n", ret);
1273
1274 return ret;
1275 }
1276
rsi_sdio_disable_interrupts(struct sdio_func * pfunc)1277 static int rsi_sdio_disable_interrupts(struct sdio_func *pfunc)
1278 {
1279 struct rsi_hw *adapter = sdio_get_drvdata(pfunc);
1280 u8 isr_status = 0, data = 0;
1281 int ret;
1282 unsigned long t1;
1283
1284 rsi_dbg(INFO_ZONE, "Waiting for interrupts to be cleared..");
1285 t1 = jiffies;
1286 do {
1287 rsi_sdio_read_register(adapter, RSI_FN1_INT_REGISTER,
1288 &isr_status);
1289 rsi_dbg(INFO_ZONE, ".");
1290 } while ((isr_status) && (jiffies_to_msecs(jiffies - t1) < 20));
1291 rsi_dbg(INFO_ZONE, "Interrupts cleared\n");
1292
1293 sdio_claim_host(pfunc);
1294 ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1295 if (ret < 0) {
1296 rsi_dbg(ERR_ZONE,
1297 "%s: Failed to read int enable register\n",
1298 __func__);
1299 goto done;
1300 }
1301
1302 data &= RSI_INT_ENABLE_MASK;
1303 ret = rsi_cmd52writebyte(pfunc->card, RSI_INT_ENABLE_REGISTER, data);
1304 if (ret < 0) {
1305 rsi_dbg(ERR_ZONE,
1306 "%s: Failed to write to int enable register\n",
1307 __func__);
1308 goto done;
1309 }
1310 ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1311 if (ret < 0) {
1312 rsi_dbg(ERR_ZONE,
1313 "%s: Failed to read int enable register\n",
1314 __func__);
1315 goto done;
1316 }
1317 rsi_dbg(INFO_ZONE, "int enable reg content = %x\n", data);
1318
1319 done:
1320 sdio_release_host(pfunc);
1321 return ret;
1322 }
1323
rsi_sdio_enable_interrupts(struct sdio_func * pfunc)1324 static int rsi_sdio_enable_interrupts(struct sdio_func *pfunc)
1325 {
1326 u8 data;
1327 int ret;
1328 struct rsi_hw *adapter = sdio_get_drvdata(pfunc);
1329 struct rsi_common *common = adapter->priv;
1330
1331 sdio_claim_host(pfunc);
1332 ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1333 if (ret < 0) {
1334 rsi_dbg(ERR_ZONE,
1335 "%s: Failed to read int enable register\n", __func__);
1336 goto done;
1337 }
1338
1339 data |= ~RSI_INT_ENABLE_MASK & 0xff;
1340
1341 ret = rsi_cmd52writebyte(pfunc->card, RSI_INT_ENABLE_REGISTER, data);
1342 if (ret < 0) {
1343 rsi_dbg(ERR_ZONE,
1344 "%s: Failed to write to int enable register\n",
1345 __func__);
1346 goto done;
1347 }
1348
1349 if ((common->wow_flags & RSI_WOW_ENABLED) &&
1350 (common->wow_flags & RSI_WOW_NO_CONNECTION))
1351 rsi_dbg(ERR_ZONE,
1352 "##### Device can not wake up through WLAN\n");
1353
1354 ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1355 if (ret < 0) {
1356 rsi_dbg(ERR_ZONE,
1357 "%s: Failed to read int enable register\n", __func__);
1358 goto done;
1359 }
1360 rsi_dbg(INFO_ZONE, "int enable reg content = %x\n", data);
1361
1362 done:
1363 sdio_release_host(pfunc);
1364 return ret;
1365 }
1366
rsi_suspend(struct device * dev)1367 static int rsi_suspend(struct device *dev)
1368 {
1369 int ret;
1370 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1371 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1372 struct rsi_common *common;
1373
1374 if (!adapter) {
1375 rsi_dbg(ERR_ZONE, "Device is not ready\n");
1376 return -ENODEV;
1377 }
1378 common = adapter->priv;
1379 rsi_sdio_disable_interrupts(pfunction);
1380
1381 ret = rsi_set_sdio_pm_caps(adapter);
1382 if (ret)
1383 rsi_dbg(INFO_ZONE,
1384 "Setting power management caps failed\n");
1385 common->fsm_state = FSM_CARD_NOT_READY;
1386
1387 return 0;
1388 }
1389
rsi_resume(struct device * dev)1390 static int rsi_resume(struct device *dev)
1391 {
1392 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1393 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1394 struct rsi_common *common = adapter->priv;
1395
1396 common->fsm_state = FSM_MAC_INIT_DONE;
1397 rsi_sdio_enable_interrupts(pfunction);
1398
1399 return 0;
1400 }
1401
rsi_freeze(struct device * dev)1402 static int rsi_freeze(struct device *dev)
1403 {
1404 int ret;
1405 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1406 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1407 struct rsi_common *common;
1408 struct rsi_91x_sdiodev *sdev;
1409
1410 rsi_dbg(INFO_ZONE, "SDIO Bus freeze ===>\n");
1411
1412 if (!adapter) {
1413 rsi_dbg(ERR_ZONE, "Device is not ready\n");
1414 return -ENODEV;
1415 }
1416 common = adapter->priv;
1417 sdev = (struct rsi_91x_sdiodev *)adapter->rsi_dev;
1418
1419 if ((common->wow_flags & RSI_WOW_ENABLED) &&
1420 (common->wow_flags & RSI_WOW_NO_CONNECTION))
1421 rsi_dbg(ERR_ZONE,
1422 "##### Device can not wake up through WLAN\n");
1423
1424 if (IS_ENABLED(CONFIG_RSI_COEX) && common->coex_mode > 1 &&
1425 common->bt_adapter) {
1426 rsi_bt_ops.detach(common->bt_adapter);
1427 common->bt_adapter = NULL;
1428 }
1429
1430 ret = rsi_sdio_disable_interrupts(pfunction);
1431
1432 if (sdev->write_fail)
1433 rsi_dbg(INFO_ZONE, "###### Device is not ready #######\n");
1434
1435 ret = rsi_set_sdio_pm_caps(adapter);
1436 if (ret)
1437 rsi_dbg(INFO_ZONE, "Setting power management caps failed\n");
1438
1439 rsi_dbg(INFO_ZONE, "***** RSI module freezed *****\n");
1440
1441 return 0;
1442 }
1443
rsi_thaw(struct device * dev)1444 static int rsi_thaw(struct device *dev)
1445 {
1446 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1447 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1448 struct rsi_common *common = adapter->priv;
1449
1450 rsi_dbg(ERR_ZONE, "SDIO Bus thaw =====>\n");
1451
1452 common->hibernate_resume = true;
1453 common->fsm_state = FSM_CARD_NOT_READY;
1454 common->iface_down = true;
1455
1456 rsi_sdio_enable_interrupts(pfunction);
1457
1458 rsi_dbg(INFO_ZONE, "***** RSI module thaw done *****\n");
1459
1460 return 0;
1461 }
1462
rsi_shutdown(struct device * dev)1463 static void rsi_shutdown(struct device *dev)
1464 {
1465 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1466 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1467 struct rsi_91x_sdiodev *sdev =
1468 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
1469 struct ieee80211_hw *hw = adapter->hw;
1470
1471 rsi_dbg(ERR_ZONE, "SDIO Bus shutdown =====>\n");
1472
1473 if (hw) {
1474 struct cfg80211_wowlan *wowlan = hw->wiphy->wowlan_config;
1475
1476 if (rsi_config_wowlan(adapter, wowlan))
1477 rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
1478 }
1479
1480 if (IS_ENABLED(CONFIG_RSI_COEX) && adapter->priv->coex_mode > 1 &&
1481 adapter->priv->bt_adapter) {
1482 rsi_bt_ops.detach(adapter->priv->bt_adapter);
1483 adapter->priv->bt_adapter = NULL;
1484 }
1485
1486 rsi_sdio_disable_interrupts(sdev->pfunction);
1487
1488 if (sdev->write_fail)
1489 rsi_dbg(INFO_ZONE, "###### Device is not ready #######\n");
1490
1491 if (rsi_set_sdio_pm_caps(adapter))
1492 rsi_dbg(INFO_ZONE, "Setting power management caps failed\n");
1493
1494 rsi_dbg(INFO_ZONE, "***** RSI module shut down *****\n");
1495 }
1496
rsi_restore(struct device * dev)1497 static int rsi_restore(struct device *dev)
1498 {
1499 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1500 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1501 struct rsi_common *common = adapter->priv;
1502
1503 rsi_dbg(INFO_ZONE, "SDIO Bus restore ======>\n");
1504 common->hibernate_resume = true;
1505 common->fsm_state = FSM_FW_NOT_LOADED;
1506 common->iface_down = true;
1507
1508 adapter->sc_nvifs = 0;
1509 adapter->ps_state = PS_NONE;
1510
1511 common->wow_flags = 0;
1512 common->iface_down = false;
1513
1514 rsi_dbg(INFO_ZONE, "RSI module restored\n");
1515
1516 return 0;
1517 }
1518 static const struct dev_pm_ops rsi_pm_ops = {
1519 .suspend = rsi_suspend,
1520 .resume = rsi_resume,
1521 .freeze = rsi_freeze,
1522 .thaw = rsi_thaw,
1523 .restore = rsi_restore,
1524 };
1525 #endif
1526
1527 static const struct sdio_device_id rsi_dev_table[] = {
1528 { SDIO_DEVICE(SDIO_VENDOR_ID_RSI, SDIO_DEVICE_ID_RSI_9113) },
1529 { SDIO_DEVICE(SDIO_VENDOR_ID_RSI, SDIO_DEVICE_ID_RSI_9116) },
1530 { /* Blank */},
1531 };
1532
1533 static struct sdio_driver rsi_driver = {
1534 .name = "RSI-SDIO WLAN",
1535 .probe = rsi_probe,
1536 .remove = rsi_disconnect,
1537 .id_table = rsi_dev_table,
1538 #ifdef CONFIG_PM
1539 .drv = {
1540 .pm = &rsi_pm_ops,
1541 .shutdown = rsi_shutdown,
1542 }
1543 #endif
1544 };
1545
1546 /**
1547 * rsi_module_init() - This function registers the sdio module.
1548 * @void: Void.
1549 *
1550 * Return: 0 on success.
1551 */
rsi_module_init(void)1552 static int rsi_module_init(void)
1553 {
1554 int ret;
1555
1556 ret = sdio_register_driver(&rsi_driver);
1557 rsi_dbg(INIT_ZONE, "%s: Registering driver\n", __func__);
1558 return ret;
1559 }
1560
1561 /**
1562 * rsi_module_exit() - This function unregisters the sdio module.
1563 * @void: Void.
1564 *
1565 * Return: None.
1566 */
rsi_module_exit(void)1567 static void rsi_module_exit(void)
1568 {
1569 sdio_unregister_driver(&rsi_driver);
1570 rsi_dbg(INFO_ZONE, "%s: Unregistering driver\n", __func__);
1571 }
1572
1573 module_init(rsi_module_init);
1574 module_exit(rsi_module_exit);
1575
1576 MODULE_AUTHOR("Redpine Signals Inc");
1577 MODULE_DESCRIPTION("Common SDIO layer for RSI drivers");
1578 MODULE_SUPPORTED_DEVICE("RSI-91x");
1579 MODULE_DEVICE_TABLE(sdio, rsi_dev_table);
1580 MODULE_FIRMWARE(FIRMWARE_RSI9113);
1581 MODULE_VERSION("0.1");
1582 MODULE_LICENSE("Dual BSD/GPL");
1583