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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 */
25static u16 dev_oper_mode = DEV_OPMODE_STA_BT_DUAL;
26module_param(dev_oper_mode, ushort, 0444);
27MODULE_PARM_DESC(dev_oper_mode, DEV_OPMODE_PARAM_DESC);
28
29/**
30 * rsi_sdio_set_cmd52_arg() - This function prepares cmd 52 read/write arg.
31 * @rw: Read/write
32 * @func: function number
33 * @raw: indicates whether to perform read after write
34 * @address: address to which to read/write
35 * @writedata: data to write
36 *
37 * Return: argument
38 */
39static u32 rsi_sdio_set_cmd52_arg(bool rw,
40 u8 func,
41 u8 raw,
42 u32 address,
43 u8 writedata)
44{
45 return ((rw & 1) << 31) | ((func & 0x7) << 28) |
46 ((raw & 1) << 27) | (1 << 26) |
47 ((address & 0x1FFFF) << 9) | (1 << 8) |
48 (writedata & 0xFF);
49}
50
51/**
52 * rsi_cmd52writebyte() - This function issues cmd52 byte write onto the card.
53 * @card: Pointer to the mmc_card.
54 * @address: Address to write.
55 * @byte: Data to write.
56 *
57 * Return: Write status.
58 */
59static int rsi_cmd52writebyte(struct mmc_card *card,
60 u32 address,
61 u8 byte)
62{
63 struct mmc_command io_cmd;
64 u32 arg;
65
66 memset(&io_cmd, 0, sizeof(io_cmd));
67 arg = rsi_sdio_set_cmd52_arg(1, 0, 0, address, byte);
68 io_cmd.opcode = SD_IO_RW_DIRECT;
69 io_cmd.arg = arg;
70 io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
71
72 return mmc_wait_for_cmd(card->host, &io_cmd, 0);
73}
74
75/**
76 * rsi_cmd52readbyte() - This function issues cmd52 byte read onto the card.
77 * @card: Pointer to the mmc_card.
78 * @address: Address to read from.
79 * @byte: Variable to store read value.
80 *
81 * Return: Read status.
82 */
83static int rsi_cmd52readbyte(struct mmc_card *card,
84 u32 address,
85 u8 *byte)
86{
87 struct mmc_command io_cmd;
88 u32 arg;
89 int err;
90
91 memset(&io_cmd, 0, sizeof(io_cmd));
92 arg = rsi_sdio_set_cmd52_arg(0, 0, 0, address, 0);
93 io_cmd.opcode = SD_IO_RW_DIRECT;
94 io_cmd.arg = arg;
95 io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
96
97 err = mmc_wait_for_cmd(card->host, &io_cmd, 0);
98 if ((!err) && (byte))
99 *byte = io_cmd.resp[0] & 0xFF;
100 return err;
101}
102
103/**
104 * rsi_issue_sdiocommand() - This function issues sdio commands.
105 * @func: Pointer to the sdio_func structure.
106 * @opcode: Opcode value.
107 * @arg: Arguments to pass.
108 * @flags: Flags which are set.
109 * @resp: Pointer to store response.
110 *
111 * Return: err: command status as 0 or -1.
112 */
113static int rsi_issue_sdiocommand(struct sdio_func *func,
114 u32 opcode,
115 u32 arg,
116 u32 flags,
117 u32 *resp)
118{
119 struct mmc_command cmd;
120 struct mmc_host *host;
121 int err;
122
123 host = func->card->host;
124
125 memset(&cmd, 0, sizeof(struct mmc_command));
126 cmd.opcode = opcode;
127 cmd.arg = arg;
128 cmd.flags = flags;
129 err = mmc_wait_for_cmd(host, &cmd, 3);
130
131 if ((!err) && (resp))
132 *resp = cmd.resp[0];
133
134 return err;
135}
136
137/**
138 * rsi_handle_interrupt() - This function is called upon the occurrence
139 * of an interrupt.
140 * @function: Pointer to the sdio_func structure.
141 *
142 * Return: None.
143 */
144static void rsi_handle_interrupt(struct sdio_func *function)
145{
146 struct rsi_hw *adapter = sdio_get_drvdata(function);
147 struct rsi_91x_sdiodev *dev = adapter->rsi_dev;
148
149 if (adapter->priv->fsm_state == FSM_FW_NOT_LOADED)
150 return;
151
152 rsi_set_event(&dev->rx_thread.event);
153}
154
155/**
156 * rsi_reset_card() - This function resets and re-initializes the card.
157 * @pfunction: Pointer to the sdio_func structure.
158 *
159 * Return: None.
160 */
161static void rsi_reset_card(struct sdio_func *pfunction)
162{
163 int ret = 0;
164 int err;
165 struct mmc_card *card = pfunction->card;
166 struct mmc_host *host = card->host;
167 u8 cmd52_resp;
168 u32 clock, resp, i;
169 u16 rca;
170
171 /* Reset 9110 chip */
172 ret = rsi_cmd52writebyte(pfunction->card,
173 SDIO_CCCR_ABORT,
174 (1 << 3));
175
176 /* Card will not send any response as it is getting reset immediately
177 * Hence expect a timeout status from host controller
178 */
179 if (ret != -ETIMEDOUT)
180 rsi_dbg(ERR_ZONE, "%s: Reset failed : %d\n", __func__, ret);
181
182 /* Wait for few milli seconds to get rid of residue charges if any */
183 msleep(20);
184
185 /* Initialize the SDIO card */
186 host->ios.chip_select = MMC_CS_DONTCARE;
187 host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
188 host->ios.power_mode = MMC_POWER_UP;
189 host->ios.bus_width = MMC_BUS_WIDTH_1;
190 host->ios.timing = MMC_TIMING_LEGACY;
191 host->ops->set_ios(host, &host->ios);
192
193 /*
194 * This delay should be sufficient to allow the power supply
195 * to reach the minimum voltage.
196 */
197 msleep(20);
198
199 host->ios.clock = host->f_min;
200 host->ios.power_mode = MMC_POWER_ON;
201 host->ops->set_ios(host, &host->ios);
202
203 /*
204 * This delay must be at least 74 clock sizes, or 1 ms, or the
205 * time required to reach a stable voltage.
206 */
207 msleep(20);
208
209 /* Issue CMD0. Goto idle state */
210 host->ios.chip_select = MMC_CS_HIGH;
211 host->ops->set_ios(host, &host->ios);
212 msleep(20);
213 err = rsi_issue_sdiocommand(pfunction,
214 MMC_GO_IDLE_STATE,
215 0,
216 (MMC_RSP_NONE | MMC_CMD_BC),
217 NULL);
218 host->ios.chip_select = MMC_CS_DONTCARE;
219 host->ops->set_ios(host, &host->ios);
220 msleep(20);
221 host->use_spi_crc = 0;
222
223 if (err)
224 rsi_dbg(ERR_ZONE, "%s: CMD0 failed : %d\n", __func__, err);
225
226 /* Issue CMD5, arg = 0 */
227 err = rsi_issue_sdiocommand(pfunction, SD_IO_SEND_OP_COND, 0,
228 (MMC_RSP_R4 | MMC_CMD_BCR), &resp);
229 if (err)
230 rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n",
231 __func__, err);
232 card->ocr = resp;
233 /* Issue CMD5, arg = ocr. Wait till card is ready */
234 for (i = 0; i < 100; i++) {
235 err = rsi_issue_sdiocommand(pfunction, SD_IO_SEND_OP_COND,
236 card->ocr,
237 (MMC_RSP_R4 | MMC_CMD_BCR), &resp);
238 if (err) {
239 rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n",
240 __func__, err);
241 break;
242 }
243
244 if (resp & MMC_CARD_BUSY)
245 break;
246 msleep(20);
247 }
248
249 if ((i == 100) || (err)) {
250 rsi_dbg(ERR_ZONE, "%s: card in not ready : %d %d\n",
251 __func__, i, err);
252 return;
253 }
254
255 /* Issue CMD3, get RCA */
256 err = rsi_issue_sdiocommand(pfunction,
257 SD_SEND_RELATIVE_ADDR,
258 0,
259 (MMC_RSP_R6 | MMC_CMD_BCR),
260 &resp);
261 if (err) {
262 rsi_dbg(ERR_ZONE, "%s: CMD3 failed : %d\n", __func__, err);
263 return;
264 }
265 rca = resp >> 16;
266 host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
267 host->ops->set_ios(host, &host->ios);
268
269 /* Issue CMD7, select card */
270 err = rsi_issue_sdiocommand(pfunction,
271 MMC_SELECT_CARD,
272 (rca << 16),
273 (MMC_RSP_R1 | MMC_CMD_AC),
274 NULL);
275 if (err) {
276 rsi_dbg(ERR_ZONE, "%s: CMD7 failed : %d\n", __func__, err);
277 return;
278 }
279
280 /* Enable high speed */
281 if (card->host->caps & MMC_CAP_SD_HIGHSPEED) {
282 rsi_dbg(ERR_ZONE, "%s: Set high speed mode\n", __func__);
283 err = rsi_cmd52readbyte(card, SDIO_CCCR_SPEED, &cmd52_resp);
284 if (err) {
285 rsi_dbg(ERR_ZONE, "%s: CCCR speed reg read failed: %d\n",
286 __func__, err);
287 } else {
288 err = rsi_cmd52writebyte(card,
289 SDIO_CCCR_SPEED,
290 (cmd52_resp | SDIO_SPEED_EHS));
291 if (err) {
292 rsi_dbg(ERR_ZONE,
293 "%s: CCR speed regwrite failed %d\n",
294 __func__, err);
295 return;
296 }
297 host->ios.timing = MMC_TIMING_SD_HS;
298 host->ops->set_ios(host, &host->ios);
299 }
300 }
301
302 /* Set clock */
303 if (mmc_card_hs(card))
304 clock = 50000000;
305 else
306 clock = card->cis.max_dtr;
307
308 if (clock > host->f_max)
309 clock = host->f_max;
310
311 host->ios.clock = clock;
312 host->ops->set_ios(host, &host->ios);
313
314 if (card->host->caps & MMC_CAP_4_BIT_DATA) {
315 /* CMD52: Set bus width & disable card detect resistor */
316 err = rsi_cmd52writebyte(card,
317 SDIO_CCCR_IF,
318 (SDIO_BUS_CD_DISABLE |
319 SDIO_BUS_WIDTH_4BIT));
320 if (err) {
321 rsi_dbg(ERR_ZONE, "%s: Set bus mode failed : %d\n",
322 __func__, err);
323 return;
324 }
325 host->ios.bus_width = MMC_BUS_WIDTH_4;
326 host->ops->set_ios(host, &host->ios);
327 }
328}
329
330/**
331 * rsi_setclock() - This function sets the clock frequency.
332 * @adapter: Pointer to the adapter structure.
333 * @freq: Clock frequency.
334 *
335 * Return: None.
336 */
337static void rsi_setclock(struct rsi_hw *adapter, u32 freq)
338{
339 struct rsi_91x_sdiodev *dev = adapter->rsi_dev;
340 struct mmc_host *host = dev->pfunction->card->host;
341 u32 clock;
342
343 clock = freq * 1000;
344 if (clock > host->f_max)
345 clock = host->f_max;
346 host->ios.clock = clock;
347 host->ops->set_ios(host, &host->ios);
348}
349
350/**
351 * rsi_setblocklength() - This function sets the host block length.
352 * @adapter: Pointer to the adapter structure.
353 * @length: Block length to be set.
354 *
355 * Return: status: 0 on success, -1 on failure.
356 */
357static int rsi_setblocklength(struct rsi_hw *adapter, u32 length)
358{
359 struct rsi_91x_sdiodev *dev = adapter->rsi_dev;
360 int status;
361 rsi_dbg(INIT_ZONE, "%s: Setting the block length\n", __func__);
362
363 status = sdio_set_block_size(dev->pfunction, length);
364 dev->pfunction->max_blksize = 256;
365 adapter->block_size = dev->pfunction->max_blksize;
366
367 rsi_dbg(INFO_ZONE,
368 "%s: Operational blk length is %d\n", __func__, length);
369 return status;
370}
371
372/**
373 * rsi_setupcard() - This function queries and sets the card's features.
374 * @adapter: Pointer to the adapter structure.
375 *
376 * Return: status: 0 on success, -1 on failure.
377 */
378static int rsi_setupcard(struct rsi_hw *adapter)
379{
380 struct rsi_91x_sdiodev *dev = adapter->rsi_dev;
381 int status = 0;
382
383 rsi_setclock(adapter, 50000);
384
385 dev->tx_blk_size = 256;
386 status = rsi_setblocklength(adapter, dev->tx_blk_size);
387 if (status)
388 rsi_dbg(ERR_ZONE,
389 "%s: Unable to set block length\n", __func__);
390 return status;
391}
392
393/**
394 * rsi_sdio_read_register() - This function reads one byte of information
395 * from a register.
396 * @adapter: Pointer to the adapter structure.
397 * @addr: Address of the register.
398 * @data: Pointer to the data that stores the data read.
399 *
400 * Return: 0 on success, -1 on failure.
401 */
402int rsi_sdio_read_register(struct rsi_hw *adapter,
403 u32 addr,
404 u8 *data)
405{
406 struct rsi_91x_sdiodev *dev = adapter->rsi_dev;
407 u8 fun_num = 0;
408 int status;
409
410 if (likely(dev->sdio_irq_task != current))
411 sdio_claim_host(dev->pfunction);
412
413 if (fun_num == 0)
414 *data = sdio_f0_readb(dev->pfunction, addr, &status);
415 else
416 *data = sdio_readb(dev->pfunction, addr, &status);
417
418 if (likely(dev->sdio_irq_task != current))
419 sdio_release_host(dev->pfunction);
420
421 return status;
422}
423
424/**
425 * rsi_sdio_write_register() - This function writes one byte of information
426 * into a register.
427 * @adapter: Pointer to the adapter structure.
428 * @function: Function Number.
429 * @addr: Address of the register.
430 * @data: Pointer to the data tha has to be written.
431 *
432 * Return: 0 on success, -1 on failure.
433 */
434int rsi_sdio_write_register(struct rsi_hw *adapter,
435 u8 function,
436 u32 addr,
437 u8 *data)
438{
439 struct rsi_91x_sdiodev *dev = adapter->rsi_dev;
440 int status = 0;
441
442 if (likely(dev->sdio_irq_task != current))
443 sdio_claim_host(dev->pfunction);
444
445 if (function == 0)
446 sdio_f0_writeb(dev->pfunction, *data, addr, &status);
447 else
448 sdio_writeb(dev->pfunction, *data, addr, &status);
449
450 if (likely(dev->sdio_irq_task != current))
451 sdio_release_host(dev->pfunction);
452
453 return status;
454}
455
456/**
457 * rsi_sdio_ack_intr() - This function acks the interrupt received.
458 * @adapter: Pointer to the adapter structure.
459 * @int_bit: Interrupt bit to write into register.
460 *
461 * Return: None.
462 */
463void rsi_sdio_ack_intr(struct rsi_hw *adapter, u8 int_bit)
464{
465 int status;
466 status = rsi_sdio_write_register(adapter,
467 1,
468 (SDIO_FUN1_INTR_CLR_REG |
469 RSI_SD_REQUEST_MASTER),
470 &int_bit);
471 if (status)
472 rsi_dbg(ERR_ZONE, "%s: unable to send ack\n", __func__);
473}
474
475
476
477/**
478 * rsi_sdio_read_register_multiple() - This function read multiple bytes of
479 * information from the SD card.
480 * @adapter: Pointer to the adapter structure.
481 * @addr: Address of the register.
482 * @count: Number of multiple bytes to be read.
483 * @data: Pointer to the read data.
484 *
485 * Return: 0 on success, -1 on failure.
486 */
487static int rsi_sdio_read_register_multiple(struct rsi_hw *adapter,
488 u32 addr,
489 u8 *data,
490 u16 count)
491{
492 struct rsi_91x_sdiodev *dev = adapter->rsi_dev;
493 u32 status;
494
495 if (likely(dev->sdio_irq_task != current))
496 sdio_claim_host(dev->pfunction);
497
498 status = sdio_readsb(dev->pfunction, data, addr, count);
499
500 if (likely(dev->sdio_irq_task != current))
501 sdio_release_host(dev->pfunction);
502
503 if (status != 0)
504 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 read failed\n", __func__);
505 return status;
506}
507
508/**
509 * rsi_sdio_write_register_multiple() - This function writes multiple bytes of
510 * information to the SD card.
511 * @adapter: Pointer to the adapter structure.
512 * @addr: Address of the register.
513 * @data: Pointer to the data that has to be written.
514 * @count: Number of multiple bytes to be written.
515 *
516 * Return: 0 on success, -1 on failure.
517 */
518int rsi_sdio_write_register_multiple(struct rsi_hw *adapter,
519 u32 addr,
520 u8 *data,
521 u16 count)
522{
523 struct rsi_91x_sdiodev *dev = adapter->rsi_dev;
524 int status;
525
526 if (dev->write_fail > 1) {
527 rsi_dbg(ERR_ZONE, "%s: Stopping card writes\n", __func__);
528 return 0;
529 } else if (dev->write_fail == 1) {
530 /**
531 * Assuming it is a CRC failure, we want to allow another
532 * card write
533 */
534 rsi_dbg(ERR_ZONE, "%s: Continue card writes\n", __func__);
535 dev->write_fail++;
536 }
537
538 if (likely(dev->sdio_irq_task != current))
539 sdio_claim_host(dev->pfunction);
540
541 status = sdio_writesb(dev->pfunction, addr, data, count);
542
543 if (likely(dev->sdio_irq_task != current))
544 sdio_release_host(dev->pfunction);
545
546 if (status) {
547 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 write failed %d\n",
548 __func__, status);
549 dev->write_fail = 2;
550 } else {
551 memcpy(dev->prev_desc, data, FRAME_DESC_SZ);
552 }
553 return status;
554}
555
556static int rsi_sdio_load_data_master_write(struct rsi_hw *adapter,
557 u32 base_address,
558 u32 instructions_sz,
559 u16 block_size,
560 u8 *ta_firmware)
561{
562 u32 num_blocks, offset, i;
563 u16 msb_address, lsb_address;
564 u8 *temp_buf;
565 int status;
566
567 num_blocks = instructions_sz / block_size;
568 msb_address = base_address >> 16;
569
570 rsi_dbg(INFO_ZONE, "ins_size: %d, num_blocks: %d\n",
571 instructions_sz, num_blocks);
572
573 temp_buf = kmalloc(block_size, GFP_KERNEL);
574 if (!temp_buf)
575 return -ENOMEM;
576
577 /* Loading DM ms word in the sdio slave */
578 status = rsi_sdio_master_access_msword(adapter, msb_address);
579 if (status < 0) {
580 rsi_dbg(ERR_ZONE, "%s: Unable to set ms word reg\n", __func__);
581 goto out_free;
582 }
583
584 for (offset = 0, i = 0; i < num_blocks; i++, offset += block_size) {
585 memcpy(temp_buf, ta_firmware + offset, block_size);
586 lsb_address = (u16)base_address;
587 status = rsi_sdio_write_register_multiple
588 (adapter,
589 lsb_address | RSI_SD_REQUEST_MASTER,
590 temp_buf, block_size);
591 if (status < 0) {
592 rsi_dbg(ERR_ZONE, "%s: failed to write\n", __func__);
593 goto out_free;
594 }
595 rsi_dbg(INFO_ZONE, "%s: loading block: %d\n", __func__, i);
596 base_address += block_size;
597
598 if ((base_address >> 16) != msb_address) {
599 msb_address += 1;
600
601 /* Loading DM ms word in the sdio slave */
602 status = rsi_sdio_master_access_msword(adapter,
603 msb_address);
604 if (status < 0) {
605 rsi_dbg(ERR_ZONE,
606 "%s: Unable to set ms word reg\n",
607 __func__);
608 goto out_free;
609 }
610 }
611 }
612
613 if (instructions_sz % block_size) {
614 memset(temp_buf, 0, block_size);
615 memcpy(temp_buf, ta_firmware + offset,
616 instructions_sz % block_size);
617 lsb_address = (u16)base_address;
618 status = rsi_sdio_write_register_multiple
619 (adapter,
620 lsb_address | RSI_SD_REQUEST_MASTER,
621 temp_buf,
622 instructions_sz % block_size);
623 if (status < 0)
624 goto out_free;
625 rsi_dbg(INFO_ZONE,
626 "Written Last Block in Address 0x%x Successfully\n",
627 offset | RSI_SD_REQUEST_MASTER);
628 }
629
630 status = 0;
631out_free:
632 kfree(temp_buf);
633 return status;
634}
635
636#define FLASH_SIZE_ADDR 0x04000016
637static int rsi_sdio_master_reg_read(struct rsi_hw *adapter, u32 addr,
638 u32 *read_buf, u16 size)
639{
640 u32 addr_on_bus, *data;
641 u16 ms_addr;
642 int status;
643
644 data = kzalloc(RSI_MASTER_REG_BUF_SIZE, GFP_KERNEL);
645 if (!data)
646 return -ENOMEM;
647
648 ms_addr = (addr >> 16);
649 status = rsi_sdio_master_access_msword(adapter, ms_addr);
650 if (status < 0) {
651 rsi_dbg(ERR_ZONE,
652 "%s: Unable to set ms word to common reg\n",
653 __func__);
654 goto err;
655 }
656 addr &= 0xFFFF;
657
658 addr_on_bus = (addr & 0xFF000000);
659 if ((addr_on_bus == (FLASH_SIZE_ADDR & 0xFF000000)) ||
660 (addr_on_bus == 0x0))
661 addr_on_bus = (addr & ~(0x3));
662 else
663 addr_on_bus = addr;
664
665 /* Bring TA out of reset */
666 status = rsi_sdio_read_register_multiple
667 (adapter,
668 (addr_on_bus | RSI_SD_REQUEST_MASTER),
669 (u8 *)data, 4);
670 if (status < 0) {
671 rsi_dbg(ERR_ZONE, "%s: AHB register read failed\n", __func__);
672 goto err;
673 }
674 if (size == 2) {
675 if ((addr & 0x3) == 0)
676 *read_buf = *data;
677 else
678 *read_buf = (*data >> 16);
679 *read_buf = (*read_buf & 0xFFFF);
680 } else if (size == 1) {
681 if ((addr & 0x3) == 0)
682 *read_buf = *data;
683 else if ((addr & 0x3) == 1)
684 *read_buf = (*data >> 8);
685 else if ((addr & 0x3) == 2)
686 *read_buf = (*data >> 16);
687 else
688 *read_buf = (*data >> 24);
689 *read_buf = (*read_buf & 0xFF);
690 } else {
691 *read_buf = *data;
692 }
693
694err:
695 kfree(data);
696 return status;
697}
698
699static int rsi_sdio_master_reg_write(struct rsi_hw *adapter,
700 unsigned long addr,
701 unsigned long data, u16 size)
702{
703 unsigned long *data_aligned;
704 int status;
705
706 data_aligned = kzalloc(RSI_MASTER_REG_BUF_SIZE, GFP_KERNEL);
707 if (!data_aligned)
708 return -ENOMEM;
709
710 if (size == 2) {
711 *data_aligned = ((data << 16) | (data & 0xFFFF));
712 } else if (size == 1) {
713 u32 temp_data = data & 0xFF;
714
715 *data_aligned = ((temp_data << 24) | (temp_data << 16) |
716 (temp_data << 8) | temp_data);
717 } else {
718 *data_aligned = data;
719 }
720 size = 4;
721
722 status = rsi_sdio_master_access_msword(adapter, (addr >> 16));
723 if (status < 0) {
724 rsi_dbg(ERR_ZONE,
725 "%s: Unable to set ms word to common reg\n",
726 __func__);
727 kfree(data_aligned);
728 return -EIO;
729 }
730 addr = addr & 0xFFFF;
731
732 /* Bring TA out of reset */
733 status = rsi_sdio_write_register_multiple
734 (adapter,
735 (addr | RSI_SD_REQUEST_MASTER),
736 (u8 *)data_aligned, size);
737 if (status < 0)
738 rsi_dbg(ERR_ZONE,
739 "%s: Unable to do AHB reg write\n", __func__);
740
741 kfree(data_aligned);
742 return status;
743}
744
745/**
746 * rsi_sdio_host_intf_write_pkt() - This function writes the packet to device.
747 * @adapter: Pointer to the adapter structure.
748 * @pkt: Pointer to the data to be written on to the device.
749 * @len: length of the data to be written on to the device.
750 *
751 * Return: 0 on success, -1 on failure.
752 */
753static int rsi_sdio_host_intf_write_pkt(struct rsi_hw *adapter,
754 u8 *pkt,
755 u32 len)
756{
757 struct rsi_91x_sdiodev *dev = adapter->rsi_dev;
758 u32 block_size = dev->tx_blk_size;
759 u32 num_blocks, address, length;
760 u32 queueno;
761 int status;
762
763 queueno = ((pkt[1] >> 4) & 0xf);
764 if (queueno == RSI_BT_MGMT_Q || queueno == RSI_BT_DATA_Q)
765 queueno = RSI_BT_Q;
766
767 num_blocks = len / block_size;
768
769 if (len % block_size)
770 num_blocks++;
771
772 address = (num_blocks * block_size | (queueno << 12));
773 length = num_blocks * block_size;
774
775 status = rsi_sdio_write_register_multiple(adapter,
776 address,
777 (u8 *)pkt,
778 length);
779 if (status)
780 rsi_dbg(ERR_ZONE, "%s: Unable to write onto the card: %d\n",
781 __func__, status);
782 rsi_dbg(DATA_TX_ZONE, "%s: Successfully written onto card\n", __func__);
783 return status;
784}
785
786/**
787 * rsi_sdio_host_intf_read_pkt() - This function reads the packet
788 * from the device.
789 * @adapter: Pointer to the adapter data structure.
790 * @pkt: Pointer to the packet data to be read from the device.
791 * @length: Length of the data to be read from the device.
792 *
793 * Return: 0 on success, -1 on failure.
794 */
795int rsi_sdio_host_intf_read_pkt(struct rsi_hw *adapter,
796 u8 *pkt,
797 u32 length)
798{
799 int status = -EINVAL;
800
801 if (!length) {
802 rsi_dbg(ERR_ZONE, "%s: Pkt size is zero\n", __func__);
803 return status;
804 }
805
806 status = rsi_sdio_read_register_multiple(adapter,
807 length,
808 (u8 *)pkt,
809 length); /*num of bytes*/
810
811 if (status)
812 rsi_dbg(ERR_ZONE, "%s: Failed to read frame: %d\n", __func__,
813 status);
814 return status;
815}
816
817/**
818 * rsi_init_sdio_interface() - This function does init specific to SDIO.
819 *
820 * @adapter: Pointer to the adapter data structure.
821 * @pfunction: Pointer to the sdio_func structure.
822 *
823 * Return: 0 on success, -1 on failure.
824 */
825static int rsi_init_sdio_interface(struct rsi_hw *adapter,
826 struct sdio_func *pfunction)
827{
828 struct rsi_91x_sdiodev *rsi_91x_dev;
829 int status;
830
831 rsi_91x_dev = kzalloc(sizeof(*rsi_91x_dev), GFP_KERNEL);
832 if (!rsi_91x_dev)
833 return -ENOMEM;
834
835 adapter->rsi_dev = rsi_91x_dev;
836
837 sdio_claim_host(pfunction);
838
839 pfunction->enable_timeout = 100;
840 status = sdio_enable_func(pfunction);
841 if (status) {
842 rsi_dbg(ERR_ZONE, "%s: Failed to enable interface\n", __func__);
843 sdio_release_host(pfunction);
844 return status;
845 }
846
847 rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__);
848
849 rsi_91x_dev->pfunction = pfunction;
850 adapter->device = &pfunction->dev;
851
852 sdio_set_drvdata(pfunction, adapter);
853
854 status = rsi_setupcard(adapter);
855 if (status) {
856 rsi_dbg(ERR_ZONE, "%s: Failed to setup card\n", __func__);
857 goto fail;
858 }
859
860 rsi_dbg(INIT_ZONE, "%s: Setup card successfully\n", __func__);
861
862 status = rsi_init_sdio_slave_regs(adapter);
863 if (status) {
864 rsi_dbg(ERR_ZONE, "%s: Failed to init slave regs\n", __func__);
865 goto fail;
866 }
867 sdio_release_host(pfunction);
868
869 adapter->determine_event_timeout = rsi_sdio_determine_event_timeout;
870 adapter->check_hw_queue_status = rsi_sdio_check_buffer_status;
871
872#ifdef CONFIG_RSI_DEBUGFS
873 adapter->num_debugfs_entries = MAX_DEBUGFS_ENTRIES;
874#endif
875 return 0;
876fail:
877 sdio_disable_func(pfunction);
878 sdio_release_host(pfunction);
879 return status;
880}
881
882static int rsi_sdio_reinit_device(struct rsi_hw *adapter)
883{
884 struct rsi_91x_sdiodev *sdev = adapter->rsi_dev;
885 struct sdio_func *pfunction = sdev->pfunction;
886 int ii;
887
888 for (ii = 0; ii < NUM_SOFT_QUEUES; ii++)
889 skb_queue_purge(&adapter->priv->tx_queue[ii]);
890
891 /* Initialize device again */
892 sdio_claim_host(pfunction);
893
894 sdio_release_irq(pfunction);
895 rsi_reset_card(pfunction);
896
897 sdio_enable_func(pfunction);
898 rsi_setupcard(adapter);
899 rsi_init_sdio_slave_regs(adapter);
900 sdio_claim_irq(pfunction, rsi_handle_interrupt);
901 rsi_hal_device_init(adapter);
902
903 sdio_release_host(pfunction);
904
905 return 0;
906}
907
908static int rsi_sdio_ta_reset(struct rsi_hw *adapter)
909{
910 int status;
911 u32 addr;
912 u8 *data;
913
914 data = kzalloc(RSI_9116_REG_SIZE, GFP_KERNEL);
915 if (!data)
916 return -ENOMEM;
917
918 status = rsi_sdio_master_access_msword(adapter, TA_BASE_ADDR);
919 if (status < 0) {
920 rsi_dbg(ERR_ZONE,
921 "Unable to set ms word to common reg\n");
922 goto err;
923 }
924
925 rsi_dbg(INIT_ZONE, "%s: Bring TA out of reset\n", __func__);
926 put_unaligned_le32(TA_HOLD_THREAD_VALUE, data);
927 addr = TA_HOLD_THREAD_REG | RSI_SD_REQUEST_MASTER;
928 status = rsi_sdio_write_register_multiple(adapter, addr,
929 (u8 *)data,
930 RSI_9116_REG_SIZE);
931 if (status < 0) {
932 rsi_dbg(ERR_ZONE, "Unable to hold TA threads\n");
933 goto err;
934 }
935
936 put_unaligned_le32(TA_SOFT_RST_CLR, data);
937 addr = TA_SOFT_RESET_REG | RSI_SD_REQUEST_MASTER;
938 status = rsi_sdio_write_register_multiple(adapter, addr,
939 (u8 *)data,
940 RSI_9116_REG_SIZE);
941 if (status < 0) {
942 rsi_dbg(ERR_ZONE, "Unable to get TA out of reset\n");
943 goto err;
944 }
945
946 put_unaligned_le32(TA_PC_ZERO, data);
947 addr = TA_TH0_PC_REG | RSI_SD_REQUEST_MASTER;
948 status = rsi_sdio_write_register_multiple(adapter, addr,
949 (u8 *)data,
950 RSI_9116_REG_SIZE);
951 if (status < 0) {
952 rsi_dbg(ERR_ZONE, "Unable to Reset TA PC value\n");
953 status = -EINVAL;
954 goto err;
955 }
956
957 put_unaligned_le32(TA_RELEASE_THREAD_VALUE, data);
958 addr = TA_RELEASE_THREAD_REG | RSI_SD_REQUEST_MASTER;
959 status = rsi_sdio_write_register_multiple(adapter, addr,
960 (u8 *)data,
961 RSI_9116_REG_SIZE);
962 if (status < 0) {
963 rsi_dbg(ERR_ZONE, "Unable to release TA threads\n");
964 goto err;
965 }
966
967 status = rsi_sdio_master_access_msword(adapter, MISC_CFG_BASE_ADDR);
968 if (status < 0) {
969 rsi_dbg(ERR_ZONE, "Unable to set ms word to common reg\n");
970 goto err;
971 }
972 rsi_dbg(INIT_ZONE, "***** TA Reset done *****\n");
973
974err:
975 kfree(data);
976 return status;
977}
978
979static struct rsi_host_intf_ops sdio_host_intf_ops = {
980 .write_pkt = rsi_sdio_host_intf_write_pkt,
981 .read_pkt = rsi_sdio_host_intf_read_pkt,
982 .master_access_msword = rsi_sdio_master_access_msword,
983 .read_reg_multiple = rsi_sdio_read_register_multiple,
984 .write_reg_multiple = rsi_sdio_write_register_multiple,
985 .master_reg_read = rsi_sdio_master_reg_read,
986 .master_reg_write = rsi_sdio_master_reg_write,
987 .load_data_master_write = rsi_sdio_load_data_master_write,
988 .reinit_device = rsi_sdio_reinit_device,
989 .ta_reset = rsi_sdio_ta_reset,
990};
991
992/**
993 * rsi_probe() - This function is called by kernel when the driver provided
994 * Vendor and device IDs are matched. All the initialization
995 * work is done here.
996 * @pfunction: Pointer to the sdio_func structure.
997 * @id: Pointer to sdio_device_id structure.
998 *
999 * Return: 0 on success, 1 on failure.
1000 */
1001static int rsi_probe(struct sdio_func *pfunction,
1002 const struct sdio_device_id *id)
1003{
1004 struct rsi_hw *adapter;
1005 struct rsi_91x_sdiodev *sdev;
1006 int status = -EINVAL;
1007
1008 rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__);
1009
1010 adapter = rsi_91x_init(dev_oper_mode);
1011 if (!adapter) {
1012 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n",
1013 __func__);
1014 return -EINVAL;
1015 }
1016 adapter->rsi_host_intf = RSI_HOST_INTF_SDIO;
1017 adapter->host_intf_ops = &sdio_host_intf_ops;
1018
1019 if (rsi_init_sdio_interface(adapter, pfunction)) {
1020 rsi_dbg(ERR_ZONE, "%s: Failed to init sdio interface\n",
1021 __func__);
1022 status = -EIO;
1023 goto fail_free_adapter;
1024 }
1025
1026 if (pfunction->device == SDIO_DEVICE_ID_RSI_9113) {
1027 rsi_dbg(ERR_ZONE, "%s: 9113 module detected\n", __func__);
1028 adapter->device_model = RSI_DEV_9113;
1029 } else if (pfunction->device == SDIO_DEVICE_ID_RSI_9116) {
1030 rsi_dbg(ERR_ZONE, "%s: 9116 module detected\n", __func__);
1031 adapter->device_model = RSI_DEV_9116;
1032 } else {
1033 rsi_dbg(ERR_ZONE,
1034 "%s: Unsupported RSI device id 0x%x\n", __func__,
1035 pfunction->device);
1036 goto fail_free_adapter;
1037 }
1038
1039 sdev = adapter->rsi_dev;
1040 rsi_init_event(&sdev->rx_thread.event);
1041 status = rsi_create_kthread(adapter->priv, &sdev->rx_thread,
1042 rsi_sdio_rx_thread, "SDIO-RX-Thread");
1043 if (status) {
1044 rsi_dbg(ERR_ZONE, "%s: Unable to init rx thrd\n", __func__);
1045 goto fail_kill_thread;
1046 }
1047
1048 sdio_claim_host(pfunction);
1049 if (sdio_claim_irq(pfunction, rsi_handle_interrupt)) {
1050 rsi_dbg(ERR_ZONE, "%s: Failed to request IRQ\n", __func__);
1051 sdio_release_host(pfunction);
1052 status = -EIO;
1053 goto fail_claim_irq;
1054 }
1055 sdio_release_host(pfunction);
1056 rsi_dbg(INIT_ZONE, "%s: Registered Interrupt handler\n", __func__);
1057
1058 if (rsi_hal_device_init(adapter)) {
1059 rsi_dbg(ERR_ZONE, "%s: Failed in device init\n", __func__);
1060 status = -EINVAL;
1061 goto fail_dev_init;
1062 }
1063 rsi_dbg(INFO_ZONE, "===> RSI Device Init Done <===\n");
1064
1065 if (rsi_sdio_master_access_msword(adapter, MISC_CFG_BASE_ADDR)) {
1066 rsi_dbg(ERR_ZONE, "%s: Unable to set ms word reg\n", __func__);
1067 status = -EIO;
1068 goto fail_dev_init;
1069 }
1070
1071 adapter->priv->hibernate_resume = false;
1072 adapter->priv->reinit_hw = false;
1073 return 0;
1074
1075fail_dev_init:
1076 sdio_claim_host(pfunction);
1077 sdio_release_irq(pfunction);
1078 sdio_release_host(pfunction);
1079fail_claim_irq:
1080 rsi_kill_thread(&sdev->rx_thread);
1081fail_kill_thread:
1082 sdio_claim_host(pfunction);
1083 sdio_disable_func(pfunction);
1084 sdio_release_host(pfunction);
1085fail_free_adapter:
1086 rsi_91x_deinit(adapter);
1087 rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__);
1088 return status;
1089}
1090
1091static void ulp_read_write(struct rsi_hw *adapter, u16 addr, u32 data,
1092 u16 len_in_bits)
1093{
1094 rsi_sdio_master_reg_write(adapter, RSI_GSPI_DATA_REG1,
1095 ((addr << 6) | ((data >> 16) & 0xffff)), 2);
1096 rsi_sdio_master_reg_write(adapter, RSI_GSPI_DATA_REG0,
1097 (data & 0xffff), 2);
1098 rsi_sdio_master_reg_write(adapter, RSI_GSPI_CTRL_REG0,
1099 RSI_GSPI_CTRL_REG0_VALUE, 2);
1100 rsi_sdio_master_reg_write(adapter, RSI_GSPI_CTRL_REG1,
1101 ((len_in_bits - 1) | RSI_GSPI_TRIG), 2);
1102 msleep(20);
1103}
1104
1105/*This function resets and re-initializes the chip.*/
1106static void rsi_reset_chip(struct rsi_hw *adapter)
1107{
1108 u8 *data;
1109 u8 sdio_interrupt_status = 0;
1110 u8 request = 1;
1111 int ret;
1112
1113 data = kzalloc(sizeof(u32), GFP_KERNEL);
1114 if (!data)
1115 return;
1116
1117 rsi_dbg(INFO_ZONE, "Writing disable to wakeup register\n");
1118 ret = rsi_sdio_write_register(adapter, 0, SDIO_WAKEUP_REG, &request);
1119 if (ret < 0) {
1120 rsi_dbg(ERR_ZONE,
1121 "%s: Failed to write SDIO wakeup register\n", __func__);
1122 goto err;
1123 }
1124 msleep(20);
1125 ret = rsi_sdio_read_register(adapter, RSI_FN1_INT_REGISTER,
1126 &sdio_interrupt_status);
1127 if (ret < 0) {
1128 rsi_dbg(ERR_ZONE, "%s: Failed to Read Intr Status Register\n",
1129 __func__);
1130 goto err;
1131 }
1132 rsi_dbg(INFO_ZONE, "%s: Intr Status Register value = %d\n",
1133 __func__, sdio_interrupt_status);
1134
1135 /* Put Thread-Arch processor on hold */
1136 if (rsi_sdio_master_access_msword(adapter, TA_BASE_ADDR)) {
1137 rsi_dbg(ERR_ZONE,
1138 "%s: Unable to set ms word to common reg\n",
1139 __func__);
1140 goto err;
1141 }
1142
1143 put_unaligned_le32(TA_HOLD_THREAD_VALUE, data);
1144 if (rsi_sdio_write_register_multiple(adapter, TA_HOLD_THREAD_REG |
1145 RSI_SD_REQUEST_MASTER,
1146 data, 4)) {
1147 rsi_dbg(ERR_ZONE,
1148 "%s: Unable to hold Thread-Arch processor threads\n",
1149 __func__);
1150 goto err;
1151 }
1152
1153 /* This msleep will ensure Thread-Arch processor to go to hold
1154 * and any pending dma transfers to rf spi in device to finish.
1155 */
1156 msleep(100);
1157 if (adapter->device_model != RSI_DEV_9116) {
1158 ulp_read_write(adapter, RSI_ULP_RESET_REG, RSI_ULP_WRITE_0, 32);
1159 ulp_read_write(adapter,
1160 RSI_WATCH_DOG_TIMER_1, RSI_ULP_WRITE_2, 32);
1161 ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_2, RSI_ULP_WRITE_0,
1162 32);
1163 ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_1,
1164 RSI_ULP_WRITE_50, 32);
1165 ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_2,
1166 RSI_ULP_WRITE_0, 32);
1167 ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_ENABLE,
1168 RSI_ULP_TIMER_ENABLE, 32);
1169 } else {
1170 if ((rsi_sdio_master_reg_write(adapter,
1171 NWP_WWD_INTERRUPT_TIMER,
1172 NWP_WWD_INT_TIMER_CLKS,
1173 RSI_9116_REG_SIZE)) < 0) {
1174 rsi_dbg(ERR_ZONE, "Failed to write to intr timer\n");
1175 }
1176 if ((rsi_sdio_master_reg_write(adapter,
1177 NWP_WWD_SYSTEM_RESET_TIMER,
1178 NWP_WWD_SYS_RESET_TIMER_CLKS,
1179 RSI_9116_REG_SIZE)) < 0) {
1180 rsi_dbg(ERR_ZONE,
1181 "Failed to write to system reset timer\n");
1182 }
1183 if ((rsi_sdio_master_reg_write(adapter,
1184 NWP_WWD_MODE_AND_RSTART,
1185 NWP_WWD_TIMER_DISABLE,
1186 RSI_9116_REG_SIZE)) < 0) {
1187 rsi_dbg(ERR_ZONE,
1188 "Failed to write to mode and restart\n");
1189 }
1190 rsi_dbg(ERR_ZONE, "***** Watch Dog Reset Successful *****\n");
1191 }
1192 /* This msleep will be sufficient for the ulp
1193 * read write operations to complete for chip reset.
1194 */
1195 msleep(500);
1196err:
1197 kfree(data);
1198 return;
1199}
1200
1201/**
1202 * rsi_disconnect() - This function performs the reverse of the probe function.
1203 * @pfunction: Pointer to the sdio_func structure.
1204 *
1205 * Return: void.
1206 */
1207static void rsi_disconnect(struct sdio_func *pfunction)
1208{
1209 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1210 struct rsi_91x_sdiodev *dev;
1211
1212 if (!adapter)
1213 return;
1214
1215 dev = adapter->rsi_dev;
1216
1217 rsi_kill_thread(&dev->rx_thread);
1218 sdio_claim_host(pfunction);
1219 sdio_release_irq(pfunction);
1220 sdio_release_host(pfunction);
1221 mdelay(10);
1222
1223 rsi_mac80211_detach(adapter);
1224 mdelay(10);
1225
1226 if (IS_ENABLED(CONFIG_RSI_COEX) && adapter->priv->coex_mode > 1 &&
1227 adapter->priv->bt_adapter) {
1228 rsi_bt_ops.detach(adapter->priv->bt_adapter);
1229 adapter->priv->bt_adapter = NULL;
1230 }
1231
1232 /* Reset Chip */
1233 rsi_reset_chip(adapter);
1234
1235 /* Resetting to take care of the case, where-in driver is re-loaded */
1236 sdio_claim_host(pfunction);
1237 rsi_reset_card(pfunction);
1238 sdio_disable_func(pfunction);
1239 sdio_release_host(pfunction);
1240 dev->write_fail = 2;
1241 rsi_91x_deinit(adapter);
1242 rsi_dbg(ERR_ZONE, "##### RSI SDIO device disconnected #####\n");
1243
1244}
1245
1246#ifdef CONFIG_PM
1247static int rsi_set_sdio_pm_caps(struct rsi_hw *adapter)
1248{
1249 struct rsi_91x_sdiodev *dev = adapter->rsi_dev;
1250 struct sdio_func *func = dev->pfunction;
1251 int ret;
1252
1253 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1254 if (ret)
1255 rsi_dbg(ERR_ZONE, "Set sdio keep pwr flag failed: %d\n", ret);
1256
1257 return ret;
1258}
1259
1260static int rsi_sdio_disable_interrupts(struct sdio_func *pfunc)
1261{
1262 struct rsi_hw *adapter = sdio_get_drvdata(pfunc);
1263 u8 isr_status = 0, data = 0;
1264 int ret;
1265 unsigned long t1;
1266
1267 rsi_dbg(INFO_ZONE, "Waiting for interrupts to be cleared..");
1268 t1 = jiffies;
1269 do {
1270 rsi_sdio_read_register(adapter, RSI_FN1_INT_REGISTER,
1271 &isr_status);
1272 rsi_dbg(INFO_ZONE, ".");
1273 } while ((isr_status) && (jiffies_to_msecs(jiffies - t1) < 20));
1274 rsi_dbg(INFO_ZONE, "Interrupts cleared\n");
1275
1276 sdio_claim_host(pfunc);
1277 ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1278 if (ret < 0) {
1279 rsi_dbg(ERR_ZONE,
1280 "%s: Failed to read int enable register\n",
1281 __func__);
1282 goto done;
1283 }
1284
1285 data &= RSI_INT_ENABLE_MASK;
1286 ret = rsi_cmd52writebyte(pfunc->card, RSI_INT_ENABLE_REGISTER, data);
1287 if (ret < 0) {
1288 rsi_dbg(ERR_ZONE,
1289 "%s: Failed to write to int enable register\n",
1290 __func__);
1291 goto done;
1292 }
1293 ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1294 if (ret < 0) {
1295 rsi_dbg(ERR_ZONE,
1296 "%s: Failed to read int enable register\n",
1297 __func__);
1298 goto done;
1299 }
1300 rsi_dbg(INFO_ZONE, "int enable reg content = %x\n", data);
1301
1302done:
1303 sdio_release_host(pfunc);
1304 return ret;
1305}
1306
1307static int rsi_sdio_enable_interrupts(struct sdio_func *pfunc)
1308{
1309 u8 data;
1310 int ret;
1311 struct rsi_hw *adapter = sdio_get_drvdata(pfunc);
1312 struct rsi_common *common = adapter->priv;
1313
1314 sdio_claim_host(pfunc);
1315 ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1316 if (ret < 0) {
1317 rsi_dbg(ERR_ZONE,
1318 "%s: Failed to read int enable register\n", __func__);
1319 goto done;
1320 }
1321
1322 data |= ~RSI_INT_ENABLE_MASK & 0xff;
1323
1324 ret = rsi_cmd52writebyte(pfunc->card, RSI_INT_ENABLE_REGISTER, data);
1325 if (ret < 0) {
1326 rsi_dbg(ERR_ZONE,
1327 "%s: Failed to write to int enable register\n",
1328 __func__);
1329 goto done;
1330 }
1331
1332 if ((common->wow_flags & RSI_WOW_ENABLED) &&
1333 (common->wow_flags & RSI_WOW_NO_CONNECTION))
1334 rsi_dbg(ERR_ZONE,
1335 "##### Device can not wake up through WLAN\n");
1336
1337 ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1338 if (ret < 0) {
1339 rsi_dbg(ERR_ZONE,
1340 "%s: Failed to read int enable register\n", __func__);
1341 goto done;
1342 }
1343 rsi_dbg(INFO_ZONE, "int enable reg content = %x\n", data);
1344
1345done:
1346 sdio_release_host(pfunc);
1347 return ret;
1348}
1349
1350static int rsi_suspend(struct device *dev)
1351{
1352 int ret;
1353 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1354 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1355 struct rsi_common *common;
1356
1357 if (!adapter) {
1358 rsi_dbg(ERR_ZONE, "Device is not ready\n");
1359 return -ENODEV;
1360 }
1361 common = adapter->priv;
1362 rsi_sdio_disable_interrupts(pfunction);
1363
1364 ret = rsi_set_sdio_pm_caps(adapter);
1365 if (ret)
1366 rsi_dbg(INFO_ZONE,
1367 "Setting power management caps failed\n");
1368 common->fsm_state = FSM_CARD_NOT_READY;
1369
1370 return 0;
1371}
1372
1373static int rsi_resume(struct device *dev)
1374{
1375 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1376 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1377 struct rsi_common *common = adapter->priv;
1378
1379 common->fsm_state = FSM_MAC_INIT_DONE;
1380 rsi_sdio_enable_interrupts(pfunction);
1381
1382 return 0;
1383}
1384
1385static int rsi_freeze(struct device *dev)
1386{
1387 int ret;
1388 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1389 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1390 struct rsi_common *common;
1391 struct rsi_91x_sdiodev *sdev;
1392
1393 rsi_dbg(INFO_ZONE, "SDIO Bus freeze ===>\n");
1394
1395 if (!adapter) {
1396 rsi_dbg(ERR_ZONE, "Device is not ready\n");
1397 return -ENODEV;
1398 }
1399 common = adapter->priv;
1400 sdev = adapter->rsi_dev;
1401
1402 if ((common->wow_flags & RSI_WOW_ENABLED) &&
1403 (common->wow_flags & RSI_WOW_NO_CONNECTION))
1404 rsi_dbg(ERR_ZONE,
1405 "##### Device can not wake up through WLAN\n");
1406
1407 if (IS_ENABLED(CONFIG_RSI_COEX) && common->coex_mode > 1 &&
1408 common->bt_adapter) {
1409 rsi_bt_ops.detach(common->bt_adapter);
1410 common->bt_adapter = NULL;
1411 }
1412
1413 ret = rsi_sdio_disable_interrupts(pfunction);
1414
1415 if (sdev->write_fail)
1416 rsi_dbg(INFO_ZONE, "###### Device is not ready #######\n");
1417
1418 ret = rsi_set_sdio_pm_caps(adapter);
1419 if (ret)
1420 rsi_dbg(INFO_ZONE, "Setting power management caps failed\n");
1421
1422 rsi_dbg(INFO_ZONE, "***** RSI module freezed *****\n");
1423
1424 return 0;
1425}
1426
1427static int rsi_thaw(struct device *dev)
1428{
1429 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1430 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1431 struct rsi_common *common = adapter->priv;
1432
1433 rsi_dbg(ERR_ZONE, "SDIO Bus thaw =====>\n");
1434
1435 common->hibernate_resume = true;
1436 common->fsm_state = FSM_CARD_NOT_READY;
1437 common->iface_down = true;
1438
1439 rsi_sdio_enable_interrupts(pfunction);
1440
1441 rsi_dbg(INFO_ZONE, "***** RSI module thaw done *****\n");
1442
1443 return 0;
1444}
1445
1446static void rsi_shutdown(struct device *dev)
1447{
1448 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1449 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1450 struct rsi_91x_sdiodev *sdev = adapter->rsi_dev;
1451 struct ieee80211_hw *hw = adapter->hw;
1452
1453 rsi_dbg(ERR_ZONE, "SDIO Bus shutdown =====>\n");
1454
1455 if (hw && hw->wiphy && hw->wiphy->wowlan_config) {
1456 if (rsi_config_wowlan(adapter, hw->wiphy->wowlan_config))
1457 rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
1458 }
1459
1460 if (IS_ENABLED(CONFIG_RSI_COEX) && adapter->priv->coex_mode > 1 &&
1461 adapter->priv->bt_adapter) {
1462 rsi_bt_ops.detach(adapter->priv->bt_adapter);
1463 adapter->priv->bt_adapter = NULL;
1464 }
1465
1466 rsi_sdio_disable_interrupts(sdev->pfunction);
1467
1468 if (sdev->write_fail)
1469 rsi_dbg(INFO_ZONE, "###### Device is not ready #######\n");
1470
1471 rsi_dbg(INFO_ZONE, "***** RSI module shut down *****\n");
1472}
1473
1474static int rsi_restore(struct device *dev)
1475{
1476 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1477 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1478 struct rsi_common *common = adapter->priv;
1479
1480 rsi_dbg(INFO_ZONE, "SDIO Bus restore ======>\n");
1481 common->hibernate_resume = true;
1482 common->fsm_state = FSM_FW_NOT_LOADED;
1483 common->iface_down = true;
1484
1485 adapter->sc_nvifs = 0;
1486 adapter->ps_state = PS_NONE;
1487
1488 common->wow_flags = 0;
1489 common->iface_down = false;
1490
1491 rsi_dbg(INFO_ZONE, "RSI module restored\n");
1492
1493 return 0;
1494}
1495static const struct dev_pm_ops rsi_pm_ops = {
1496 .suspend = rsi_suspend,
1497 .resume_noirq = rsi_resume,
1498 .freeze = rsi_freeze,
1499 .thaw = rsi_thaw,
1500 .restore = rsi_restore,
1501};
1502#endif
1503
1504static const struct sdio_device_id rsi_dev_table[] = {
1505 { SDIO_DEVICE(SDIO_VENDOR_ID_RSI, SDIO_DEVICE_ID_RSI_9113) },
1506 { SDIO_DEVICE(SDIO_VENDOR_ID_RSI, SDIO_DEVICE_ID_RSI_9116) },
1507 { /* Blank */},
1508};
1509
1510static struct sdio_driver rsi_driver = {
1511 .name = "RSI-SDIO WLAN",
1512 .probe = rsi_probe,
1513 .remove = rsi_disconnect,
1514 .id_table = rsi_dev_table,
1515#ifdef CONFIG_PM
1516 .drv = {
1517 .pm = &rsi_pm_ops,
1518 .shutdown = rsi_shutdown,
1519 }
1520#endif
1521};
1522
1523/**
1524 * rsi_module_init() - This function registers the sdio module.
1525 * @void: Void.
1526 *
1527 * Return: 0 on success.
1528 */
1529static int rsi_module_init(void)
1530{
1531 int ret;
1532
1533 ret = sdio_register_driver(&rsi_driver);
1534 rsi_dbg(INIT_ZONE, "%s: Registering driver\n", __func__);
1535 return ret;
1536}
1537
1538/**
1539 * rsi_module_exit() - This function unregisters the sdio module.
1540 * @void: Void.
1541 *
1542 * Return: None.
1543 */
1544static void rsi_module_exit(void)
1545{
1546 sdio_unregister_driver(&rsi_driver);
1547 rsi_dbg(INFO_ZONE, "%s: Unregistering driver\n", __func__);
1548}
1549
1550module_init(rsi_module_init);
1551module_exit(rsi_module_exit);
1552
1553MODULE_AUTHOR("Redpine Signals Inc");
1554MODULE_DESCRIPTION("Common SDIO layer for RSI drivers");
1555MODULE_DEVICE_TABLE(sdio, rsi_dev_table);
1556MODULE_FIRMWARE(FIRMWARE_RSI9113);
1557MODULE_VERSION("0.1");
1558MODULE_LICENSE("Dual BSD/GPL");
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 */
25static u16 dev_oper_mode = DEV_OPMODE_STA_BT_DUAL;
26module_param(dev_oper_mode, ushort, 0444);
27MODULE_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 */
42static 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 */
62static 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 */
86static 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 */
116static 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 occurence
142 * of an interrupt.
143 * @function: Pointer to the sdio_func structure.
144 *
145 * Return: None.
146 */
147static 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 */
167static 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 s32 bit = (fls(host->ocr_avail) - 1);
174 u8 cmd52_resp;
175 u32 clock, resp, i;
176 u16 rca;
177
178 /* Reset 9110 chip */
179 ret = rsi_cmd52writebyte(pfunction->card,
180 SDIO_CCCR_ABORT,
181 (1 << 3));
182
183 /* Card will not send any response as it is getting reset immediately
184 * Hence expect a timeout status from host controller
185 */
186 if (ret != -ETIMEDOUT)
187 rsi_dbg(ERR_ZONE, "%s: Reset failed : %d\n", __func__, ret);
188
189 /* Wait for few milli seconds to get rid of residue charges if any */
190 msleep(20);
191
192 /* Initialize the SDIO card */
193 host->ios.vdd = bit;
194 host->ios.chip_select = MMC_CS_DONTCARE;
195 host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
196 host->ios.power_mode = MMC_POWER_UP;
197 host->ios.bus_width = MMC_BUS_WIDTH_1;
198 host->ios.timing = MMC_TIMING_LEGACY;
199 host->ops->set_ios(host, &host->ios);
200
201 /*
202 * This delay should be sufficient to allow the power supply
203 * to reach the minimum voltage.
204 */
205 msleep(20);
206
207 host->ios.clock = host->f_min;
208 host->ios.power_mode = MMC_POWER_ON;
209 host->ops->set_ios(host, &host->ios);
210
211 /*
212 * This delay must be at least 74 clock sizes, or 1 ms, or the
213 * time required to reach a stable voltage.
214 */
215 msleep(20);
216
217 /* Issue CMD0. Goto idle state */
218 host->ios.chip_select = MMC_CS_HIGH;
219 host->ops->set_ios(host, &host->ios);
220 msleep(20);
221 err = rsi_issue_sdiocommand(pfunction,
222 MMC_GO_IDLE_STATE,
223 0,
224 (MMC_RSP_NONE | MMC_CMD_BC),
225 NULL);
226 host->ios.chip_select = MMC_CS_DONTCARE;
227 host->ops->set_ios(host, &host->ios);
228 msleep(20);
229 host->use_spi_crc = 0;
230
231 if (err)
232 rsi_dbg(ERR_ZONE, "%s: CMD0 failed : %d\n", __func__, err);
233
234 /* Issue CMD5, arg = 0 */
235 err = rsi_issue_sdiocommand(pfunction, SD_IO_SEND_OP_COND, 0,
236 (MMC_RSP_R4 | MMC_CMD_BCR), &resp);
237 if (err)
238 rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n", __func__, err);
239 card->ocr = resp;
240
241 /* Issue CMD5, arg = ocr. Wait till card is ready */
242 for (i = 0; i < 100; i++) {
243 err = rsi_issue_sdiocommand(pfunction, SD_IO_SEND_OP_COND,
244 card->ocr,
245 (MMC_RSP_R4 | MMC_CMD_BCR), &resp);
246 if (err) {
247 rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n",
248 __func__, err);
249 break;
250 }
251
252 if (resp & MMC_CARD_BUSY)
253 break;
254 msleep(20);
255 }
256
257 if ((i == 100) || (err)) {
258 rsi_dbg(ERR_ZONE, "%s: card in not ready : %d %d\n",
259 __func__, i, err);
260 return;
261 }
262
263 /* Issue CMD3, get RCA */
264 err = rsi_issue_sdiocommand(pfunction,
265 SD_SEND_RELATIVE_ADDR,
266 0,
267 (MMC_RSP_R6 | MMC_CMD_BCR),
268 &resp);
269 if (err) {
270 rsi_dbg(ERR_ZONE, "%s: CMD3 failed : %d\n", __func__, err);
271 return;
272 }
273 rca = resp >> 16;
274 host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
275 host->ops->set_ios(host, &host->ios);
276
277 /* Issue CMD7, select card */
278 err = rsi_issue_sdiocommand(pfunction,
279 MMC_SELECT_CARD,
280 (rca << 16),
281 (MMC_RSP_R1 | MMC_CMD_AC),
282 NULL);
283 if (err) {
284 rsi_dbg(ERR_ZONE, "%s: CMD7 failed : %d\n", __func__, err);
285 return;
286 }
287
288 /* Enable high speed */
289 if (card->host->caps & MMC_CAP_SD_HIGHSPEED) {
290 rsi_dbg(ERR_ZONE, "%s: Set high speed mode\n", __func__);
291 err = rsi_cmd52readbyte(card, SDIO_CCCR_SPEED, &cmd52_resp);
292 if (err) {
293 rsi_dbg(ERR_ZONE, "%s: CCCR speed reg read failed: %d\n",
294 __func__, err);
295 } else {
296 err = rsi_cmd52writebyte(card,
297 SDIO_CCCR_SPEED,
298 (cmd52_resp | SDIO_SPEED_EHS));
299 if (err) {
300 rsi_dbg(ERR_ZONE,
301 "%s: CCR speed regwrite failed %d\n",
302 __func__, err);
303 return;
304 }
305 host->ios.timing = MMC_TIMING_SD_HS;
306 host->ops->set_ios(host, &host->ios);
307 }
308 }
309
310 /* Set clock */
311 if (mmc_card_hs(card))
312 clock = 50000000;
313 else
314 clock = card->cis.max_dtr;
315
316 if (clock > host->f_max)
317 clock = host->f_max;
318
319 host->ios.clock = clock;
320 host->ops->set_ios(host, &host->ios);
321
322 if (card->host->caps & MMC_CAP_4_BIT_DATA) {
323 /* CMD52: Set bus width & disable card detect resistor */
324 err = rsi_cmd52writebyte(card,
325 SDIO_CCCR_IF,
326 (SDIO_BUS_CD_DISABLE |
327 SDIO_BUS_WIDTH_4BIT));
328 if (err) {
329 rsi_dbg(ERR_ZONE, "%s: Set bus mode failed : %d\n",
330 __func__, err);
331 return;
332 }
333 host->ios.bus_width = MMC_BUS_WIDTH_4;
334 host->ops->set_ios(host, &host->ios);
335 }
336}
337
338/**
339 * rsi_setclock() - This function sets the clock frequency.
340 * @adapter: Pointer to the adapter structure.
341 * @freq: Clock frequency.
342 *
343 * Return: None.
344 */
345static void rsi_setclock(struct rsi_hw *adapter, u32 freq)
346{
347 struct rsi_91x_sdiodev *dev =
348 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
349 struct mmc_host *host = dev->pfunction->card->host;
350 u32 clock;
351
352 clock = freq * 1000;
353 if (clock > host->f_max)
354 clock = host->f_max;
355 host->ios.clock = clock;
356 host->ops->set_ios(host, &host->ios);
357}
358
359/**
360 * rsi_setblocklength() - This function sets the host block length.
361 * @adapter: Pointer to the adapter structure.
362 * @length: Block length to be set.
363 *
364 * Return: status: 0 on success, -1 on failure.
365 */
366static int rsi_setblocklength(struct rsi_hw *adapter, u32 length)
367{
368 struct rsi_91x_sdiodev *dev =
369 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
370 int status;
371 rsi_dbg(INIT_ZONE, "%s: Setting the block length\n", __func__);
372
373 status = sdio_set_block_size(dev->pfunction, length);
374 dev->pfunction->max_blksize = 256;
375 adapter->block_size = dev->pfunction->max_blksize;
376
377 rsi_dbg(INFO_ZONE,
378 "%s: Operational blk length is %d\n", __func__, length);
379 return status;
380}
381
382/**
383 * rsi_setupcard() - This function queries and sets the card's features.
384 * @adapter: Pointer to the adapter structure.
385 *
386 * Return: status: 0 on success, -1 on failure.
387 */
388static int rsi_setupcard(struct rsi_hw *adapter)
389{
390 struct rsi_91x_sdiodev *dev =
391 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
392 int status = 0;
393
394 rsi_setclock(adapter, 50000);
395
396 dev->tx_blk_size = 256;
397 status = rsi_setblocklength(adapter, dev->tx_blk_size);
398 if (status)
399 rsi_dbg(ERR_ZONE,
400 "%s: Unable to set block length\n", __func__);
401 return status;
402}
403
404/**
405 * rsi_sdio_read_register() - This function reads one byte of information
406 * from a register.
407 * @adapter: Pointer to the adapter structure.
408 * @addr: Address of the register.
409 * @data: Pointer to the data that stores the data read.
410 *
411 * Return: 0 on success, -1 on failure.
412 */
413int rsi_sdio_read_register(struct rsi_hw *adapter,
414 u32 addr,
415 u8 *data)
416{
417 struct rsi_91x_sdiodev *dev =
418 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
419 u8 fun_num = 0;
420 int status;
421
422 if (likely(dev->sdio_irq_task != current))
423 sdio_claim_host(dev->pfunction);
424
425 if (fun_num == 0)
426 *data = sdio_f0_readb(dev->pfunction, addr, &status);
427 else
428 *data = sdio_readb(dev->pfunction, addr, &status);
429
430 if (likely(dev->sdio_irq_task != current))
431 sdio_release_host(dev->pfunction);
432
433 return status;
434}
435
436/**
437 * rsi_sdio_write_register() - This function writes one byte of information
438 * into a register.
439 * @adapter: Pointer to the adapter structure.
440 * @function: Function Number.
441 * @addr: Address of the register.
442 * @data: Pointer to the data tha has to be written.
443 *
444 * Return: 0 on success, -1 on failure.
445 */
446int rsi_sdio_write_register(struct rsi_hw *adapter,
447 u8 function,
448 u32 addr,
449 u8 *data)
450{
451 struct rsi_91x_sdiodev *dev =
452 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
453 int status = 0;
454
455 if (likely(dev->sdio_irq_task != current))
456 sdio_claim_host(dev->pfunction);
457
458 if (function == 0)
459 sdio_f0_writeb(dev->pfunction, *data, addr, &status);
460 else
461 sdio_writeb(dev->pfunction, *data, addr, &status);
462
463 if (likely(dev->sdio_irq_task != current))
464 sdio_release_host(dev->pfunction);
465
466 return status;
467}
468
469/**
470 * rsi_sdio_ack_intr() - This function acks the interrupt received.
471 * @adapter: Pointer to the adapter structure.
472 * @int_bit: Interrupt bit to write into register.
473 *
474 * Return: None.
475 */
476void rsi_sdio_ack_intr(struct rsi_hw *adapter, u8 int_bit)
477{
478 int status;
479 status = rsi_sdio_write_register(adapter,
480 1,
481 (SDIO_FUN1_INTR_CLR_REG |
482 RSI_SD_REQUEST_MASTER),
483 &int_bit);
484 if (status)
485 rsi_dbg(ERR_ZONE, "%s: unable to send ack\n", __func__);
486}
487
488
489
490/**
491 * rsi_sdio_read_register_multiple() - This function read multiple bytes of
492 * information from the SD card.
493 * @adapter: Pointer to the adapter structure.
494 * @addr: Address of the register.
495 * @count: Number of multiple bytes to be read.
496 * @data: Pointer to the read data.
497 *
498 * Return: 0 on success, -1 on failure.
499 */
500static int rsi_sdio_read_register_multiple(struct rsi_hw *adapter,
501 u32 addr,
502 u8 *data,
503 u16 count)
504{
505 struct rsi_91x_sdiodev *dev =
506 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
507 u32 status;
508
509 if (likely(dev->sdio_irq_task != current))
510 sdio_claim_host(dev->pfunction);
511
512 status = sdio_readsb(dev->pfunction, data, addr, count);
513
514 if (likely(dev->sdio_irq_task != current))
515 sdio_release_host(dev->pfunction);
516
517 if (status != 0)
518 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 read failed\n", __func__);
519 return status;
520}
521
522/**
523 * rsi_sdio_write_register_multiple() - This function writes multiple bytes of
524 * information to the SD card.
525 * @adapter: Pointer to the adapter structure.
526 * @addr: Address of the register.
527 * @data: Pointer to the data that has to be written.
528 * @count: Number of multiple bytes to be written.
529 *
530 * Return: 0 on success, -1 on failure.
531 */
532int rsi_sdio_write_register_multiple(struct rsi_hw *adapter,
533 u32 addr,
534 u8 *data,
535 u16 count)
536{
537 struct rsi_91x_sdiodev *dev =
538 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
539 int status;
540
541 if (dev->write_fail > 1) {
542 rsi_dbg(ERR_ZONE, "%s: Stopping card writes\n", __func__);
543 return 0;
544 } else if (dev->write_fail == 1) {
545 /**
546 * Assuming it is a CRC failure, we want to allow another
547 * card write
548 */
549 rsi_dbg(ERR_ZONE, "%s: Continue card writes\n", __func__);
550 dev->write_fail++;
551 }
552
553 if (likely(dev->sdio_irq_task != current))
554 sdio_claim_host(dev->pfunction);
555
556 status = sdio_writesb(dev->pfunction, addr, data, count);
557
558 if (likely(dev->sdio_irq_task != current))
559 sdio_release_host(dev->pfunction);
560
561 if (status) {
562 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 write failed %d\n",
563 __func__, status);
564 dev->write_fail = 2;
565 } else {
566 memcpy(dev->prev_desc, data, FRAME_DESC_SZ);
567 }
568 return status;
569}
570
571static int rsi_sdio_load_data_master_write(struct rsi_hw *adapter,
572 u32 base_address,
573 u32 instructions_sz,
574 u16 block_size,
575 u8 *ta_firmware)
576{
577 u32 num_blocks, offset, i;
578 u16 msb_address, lsb_address;
579 u8 *temp_buf;
580 int status;
581
582 num_blocks = instructions_sz / block_size;
583 msb_address = base_address >> 16;
584
585 rsi_dbg(INFO_ZONE, "ins_size: %d, num_blocks: %d\n",
586 instructions_sz, num_blocks);
587
588 temp_buf = kmalloc(block_size, GFP_KERNEL);
589 if (!temp_buf)
590 return -ENOMEM;
591
592 /* Loading DM ms word in the sdio slave */
593 status = rsi_sdio_master_access_msword(adapter, msb_address);
594 if (status < 0) {
595 rsi_dbg(ERR_ZONE, "%s: Unable to set ms word reg\n", __func__);
596 goto out_free;
597 }
598
599 for (offset = 0, i = 0; i < num_blocks; i++, offset += block_size) {
600 memcpy(temp_buf, ta_firmware + offset, block_size);
601 lsb_address = (u16)base_address;
602 status = rsi_sdio_write_register_multiple
603 (adapter,
604 lsb_address | RSI_SD_REQUEST_MASTER,
605 temp_buf, block_size);
606 if (status < 0) {
607 rsi_dbg(ERR_ZONE, "%s: failed to write\n", __func__);
608 goto out_free;
609 }
610 rsi_dbg(INFO_ZONE, "%s: loading block: %d\n", __func__, i);
611 base_address += block_size;
612
613 if ((base_address >> 16) != msb_address) {
614 msb_address += 1;
615
616 /* Loading DM ms word in the sdio slave */
617 status = rsi_sdio_master_access_msword(adapter,
618 msb_address);
619 if (status < 0) {
620 rsi_dbg(ERR_ZONE,
621 "%s: Unable to set ms word reg\n",
622 __func__);
623 goto out_free;
624 }
625 }
626 }
627
628 if (instructions_sz % block_size) {
629 memset(temp_buf, 0, block_size);
630 memcpy(temp_buf, ta_firmware + offset,
631 instructions_sz % block_size);
632 lsb_address = (u16)base_address;
633 status = rsi_sdio_write_register_multiple
634 (adapter,
635 lsb_address | RSI_SD_REQUEST_MASTER,
636 temp_buf,
637 instructions_sz % block_size);
638 if (status < 0)
639 goto out_free;
640 rsi_dbg(INFO_ZONE,
641 "Written Last Block in Address 0x%x Successfully\n",
642 offset | RSI_SD_REQUEST_MASTER);
643 }
644
645 status = 0;
646out_free:
647 kfree(temp_buf);
648 return status;
649}
650
651#define FLASH_SIZE_ADDR 0x04000016
652static int rsi_sdio_master_reg_read(struct rsi_hw *adapter, u32 addr,
653 u32 *read_buf, u16 size)
654{
655 u32 addr_on_bus, *data;
656 u16 ms_addr;
657 int status;
658
659 data = kzalloc(RSI_MASTER_REG_BUF_SIZE, GFP_KERNEL);
660 if (!data)
661 return -ENOMEM;
662
663 data = PTR_ALIGN(data, 8);
664
665 ms_addr = (addr >> 16);
666 status = rsi_sdio_master_access_msword(adapter, ms_addr);
667 if (status < 0) {
668 rsi_dbg(ERR_ZONE,
669 "%s: Unable to set ms word to common reg\n",
670 __func__);
671 goto err;
672 }
673 addr &= 0xFFFF;
674
675 addr_on_bus = (addr & 0xFF000000);
676 if ((addr_on_bus == (FLASH_SIZE_ADDR & 0xFF000000)) ||
677 (addr_on_bus == 0x0))
678 addr_on_bus = (addr & ~(0x3));
679 else
680 addr_on_bus = addr;
681
682 /* Bring TA out of reset */
683 status = rsi_sdio_read_register_multiple
684 (adapter,
685 (addr_on_bus | RSI_SD_REQUEST_MASTER),
686 (u8 *)data, 4);
687 if (status < 0) {
688 rsi_dbg(ERR_ZONE, "%s: AHB register read failed\n", __func__);
689 goto err;
690 }
691 if (size == 2) {
692 if ((addr & 0x3) == 0)
693 *read_buf = *data;
694 else
695 *read_buf = (*data >> 16);
696 *read_buf = (*read_buf & 0xFFFF);
697 } else if (size == 1) {
698 if ((addr & 0x3) == 0)
699 *read_buf = *data;
700 else if ((addr & 0x3) == 1)
701 *read_buf = (*data >> 8);
702 else if ((addr & 0x3) == 2)
703 *read_buf = (*data >> 16);
704 else
705 *read_buf = (*data >> 24);
706 *read_buf = (*read_buf & 0xFF);
707 } else {
708 *read_buf = *data;
709 }
710
711err:
712 kfree(data);
713 return status;
714}
715
716static int rsi_sdio_master_reg_write(struct rsi_hw *adapter,
717 unsigned long addr,
718 unsigned long data, u16 size)
719{
720 unsigned long *data_aligned;
721 int status;
722
723 data_aligned = kzalloc(RSI_MASTER_REG_BUF_SIZE, GFP_KERNEL);
724 if (!data_aligned)
725 return -ENOMEM;
726
727 data_aligned = PTR_ALIGN(data_aligned, 8);
728
729 if (size == 2) {
730 *data_aligned = ((data << 16) | (data & 0xFFFF));
731 } else if (size == 1) {
732 u32 temp_data = data & 0xFF;
733
734 *data_aligned = ((temp_data << 24) | (temp_data << 16) |
735 (temp_data << 8) | temp_data);
736 } else {
737 *data_aligned = data;
738 }
739 size = 4;
740
741 status = rsi_sdio_master_access_msword(adapter, (addr >> 16));
742 if (status < 0) {
743 rsi_dbg(ERR_ZONE,
744 "%s: Unable to set ms word to common reg\n",
745 __func__);
746 kfree(data_aligned);
747 return -EIO;
748 }
749 addr = addr & 0xFFFF;
750
751 /* Bring TA out of reset */
752 status = rsi_sdio_write_register_multiple
753 (adapter,
754 (addr | RSI_SD_REQUEST_MASTER),
755 (u8 *)data_aligned, size);
756 if (status < 0)
757 rsi_dbg(ERR_ZONE,
758 "%s: Unable to do AHB reg write\n", __func__);
759
760 kfree(data_aligned);
761 return status;
762}
763
764/**
765 * rsi_sdio_host_intf_write_pkt() - This function writes the packet to device.
766 * @adapter: Pointer to the adapter structure.
767 * @pkt: Pointer to the data to be written on to the device.
768 * @len: length of the data to be written on to the device.
769 *
770 * Return: 0 on success, -1 on failure.
771 */
772static int rsi_sdio_host_intf_write_pkt(struct rsi_hw *adapter,
773 u8 *pkt,
774 u32 len)
775{
776 struct rsi_91x_sdiodev *dev =
777 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
778 u32 block_size = dev->tx_blk_size;
779 u32 num_blocks, address, length;
780 u32 queueno;
781 int status;
782
783 queueno = ((pkt[1] >> 4) & 0xf);
784 if (queueno == RSI_BT_MGMT_Q || queueno == RSI_BT_DATA_Q)
785 queueno = RSI_BT_Q;
786
787 num_blocks = len / block_size;
788
789 if (len % block_size)
790 num_blocks++;
791
792 address = (num_blocks * block_size | (queueno << 12));
793 length = num_blocks * block_size;
794
795 status = rsi_sdio_write_register_multiple(adapter,
796 address,
797 (u8 *)pkt,
798 length);
799 if (status)
800 rsi_dbg(ERR_ZONE, "%s: Unable to write onto the card: %d\n",
801 __func__, status);
802 rsi_dbg(DATA_TX_ZONE, "%s: Successfully written onto card\n", __func__);
803 return status;
804}
805
806/**
807 * rsi_sdio_host_intf_read_pkt() - This function reads the packet
808 from the device.
809 * @adapter: Pointer to the adapter data structure.
810 * @pkt: Pointer to the packet data to be read from the the device.
811 * @length: Length of the data to be read from the device.
812 *
813 * Return: 0 on success, -1 on failure.
814 */
815int rsi_sdio_host_intf_read_pkt(struct rsi_hw *adapter,
816 u8 *pkt,
817 u32 length)
818{
819 int status = -EINVAL;
820
821 if (!length) {
822 rsi_dbg(ERR_ZONE, "%s: Pkt size is zero\n", __func__);
823 return status;
824 }
825
826 status = rsi_sdio_read_register_multiple(adapter,
827 length,
828 (u8 *)pkt,
829 length); /*num of bytes*/
830
831 if (status)
832 rsi_dbg(ERR_ZONE, "%s: Failed to read frame: %d\n", __func__,
833 status);
834 return status;
835}
836
837/**
838 * rsi_init_sdio_interface() - This function does init specific to SDIO.
839 *
840 * @adapter: Pointer to the adapter data structure.
841 * @pkt: Pointer to the packet data to be read from the the device.
842 *
843 * Return: 0 on success, -1 on failure.
844 */
845
846static int rsi_init_sdio_interface(struct rsi_hw *adapter,
847 struct sdio_func *pfunction)
848{
849 struct rsi_91x_sdiodev *rsi_91x_dev;
850 int status = -ENOMEM;
851
852 rsi_91x_dev = kzalloc(sizeof(*rsi_91x_dev), GFP_KERNEL);
853 if (!rsi_91x_dev)
854 return status;
855
856 adapter->rsi_dev = rsi_91x_dev;
857
858 sdio_claim_host(pfunction);
859
860 pfunction->enable_timeout = 100;
861 status = sdio_enable_func(pfunction);
862 if (status) {
863 rsi_dbg(ERR_ZONE, "%s: Failed to enable interface\n", __func__);
864 sdio_release_host(pfunction);
865 return status;
866 }
867
868 rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__);
869
870 rsi_91x_dev->pfunction = pfunction;
871 adapter->device = &pfunction->dev;
872
873 sdio_set_drvdata(pfunction, adapter);
874
875 status = rsi_setupcard(adapter);
876 if (status) {
877 rsi_dbg(ERR_ZONE, "%s: Failed to setup card\n", __func__);
878 goto fail;
879 }
880
881 rsi_dbg(INIT_ZONE, "%s: Setup card succesfully\n", __func__);
882
883 status = rsi_init_sdio_slave_regs(adapter);
884 if (status) {
885 rsi_dbg(ERR_ZONE, "%s: Failed to init slave regs\n", __func__);
886 goto fail;
887 }
888 sdio_release_host(pfunction);
889
890 adapter->determine_event_timeout = rsi_sdio_determine_event_timeout;
891 adapter->check_hw_queue_status = rsi_sdio_check_buffer_status;
892
893#ifdef CONFIG_RSI_DEBUGFS
894 adapter->num_debugfs_entries = MAX_DEBUGFS_ENTRIES;
895#endif
896 return status;
897fail:
898 sdio_disable_func(pfunction);
899 sdio_release_host(pfunction);
900 return status;
901}
902
903static int rsi_sdio_reinit_device(struct rsi_hw *adapter)
904{
905 struct rsi_91x_sdiodev *sdev = adapter->rsi_dev;
906 struct sdio_func *pfunction = sdev->pfunction;
907 int ii;
908
909 for (ii = 0; ii < NUM_SOFT_QUEUES; ii++)
910 skb_queue_purge(&adapter->priv->tx_queue[ii]);
911
912 /* Initialize device again */
913 sdio_claim_host(pfunction);
914
915 sdio_release_irq(pfunction);
916 rsi_reset_card(pfunction);
917
918 sdio_enable_func(pfunction);
919 rsi_setupcard(adapter);
920 rsi_init_sdio_slave_regs(adapter);
921 sdio_claim_irq(pfunction, rsi_handle_interrupt);
922 rsi_hal_device_init(adapter);
923
924 sdio_release_host(pfunction);
925
926 return 0;
927}
928
929static struct rsi_host_intf_ops sdio_host_intf_ops = {
930 .write_pkt = rsi_sdio_host_intf_write_pkt,
931 .read_pkt = rsi_sdio_host_intf_read_pkt,
932 .master_access_msword = rsi_sdio_master_access_msword,
933 .read_reg_multiple = rsi_sdio_read_register_multiple,
934 .write_reg_multiple = rsi_sdio_write_register_multiple,
935 .master_reg_read = rsi_sdio_master_reg_read,
936 .master_reg_write = rsi_sdio_master_reg_write,
937 .load_data_master_write = rsi_sdio_load_data_master_write,
938 .reinit_device = rsi_sdio_reinit_device,
939};
940
941/**
942 * rsi_probe() - This function is called by kernel when the driver provided
943 * Vendor and device IDs are matched. All the initialization
944 * work is done here.
945 * @pfunction: Pointer to the sdio_func structure.
946 * @id: Pointer to sdio_device_id structure.
947 *
948 * Return: 0 on success, 1 on failure.
949 */
950static int rsi_probe(struct sdio_func *pfunction,
951 const struct sdio_device_id *id)
952{
953 struct rsi_hw *adapter;
954 struct rsi_91x_sdiodev *sdev;
955 int status;
956
957 rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__);
958
959 adapter = rsi_91x_init(dev_oper_mode);
960 if (!adapter) {
961 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n",
962 __func__);
963 return -EINVAL;
964 }
965 adapter->rsi_host_intf = RSI_HOST_INTF_SDIO;
966 adapter->host_intf_ops = &sdio_host_intf_ops;
967
968 if (rsi_init_sdio_interface(adapter, pfunction)) {
969 rsi_dbg(ERR_ZONE, "%s: Failed to init sdio interface\n",
970 __func__);
971 status = -EIO;
972 goto fail_free_adapter;
973 }
974 sdev = (struct rsi_91x_sdiodev *)adapter->rsi_dev;
975 rsi_init_event(&sdev->rx_thread.event);
976 status = rsi_create_kthread(adapter->priv, &sdev->rx_thread,
977 rsi_sdio_rx_thread, "SDIO-RX-Thread");
978 if (status) {
979 rsi_dbg(ERR_ZONE, "%s: Unable to init rx thrd\n", __func__);
980 goto fail_kill_thread;
981 }
982 skb_queue_head_init(&sdev->rx_q.head);
983 sdev->rx_q.num_rx_pkts = 0;
984
985 sdio_claim_host(pfunction);
986 if (sdio_claim_irq(pfunction, rsi_handle_interrupt)) {
987 rsi_dbg(ERR_ZONE, "%s: Failed to request IRQ\n", __func__);
988 sdio_release_host(pfunction);
989 status = -EIO;
990 goto fail_claim_irq;
991 }
992 sdio_release_host(pfunction);
993 rsi_dbg(INIT_ZONE, "%s: Registered Interrupt handler\n", __func__);
994
995 if (rsi_hal_device_init(adapter)) {
996 rsi_dbg(ERR_ZONE, "%s: Failed in device init\n", __func__);
997 status = -EINVAL;
998 goto fail_dev_init;
999 }
1000 rsi_dbg(INFO_ZONE, "===> RSI Device Init Done <===\n");
1001
1002 if (rsi_sdio_master_access_msword(adapter, MISC_CFG_BASE_ADDR)) {
1003 rsi_dbg(ERR_ZONE, "%s: Unable to set ms word reg\n", __func__);
1004 status = -EIO;
1005 goto fail_dev_init;
1006 }
1007
1008 adapter->priv->hibernate_resume = false;
1009 adapter->priv->reinit_hw = false;
1010 return 0;
1011
1012fail_dev_init:
1013 sdio_claim_host(pfunction);
1014 sdio_release_irq(pfunction);
1015 sdio_release_host(pfunction);
1016fail_claim_irq:
1017 rsi_kill_thread(&sdev->rx_thread);
1018fail_kill_thread:
1019 sdio_claim_host(pfunction);
1020 sdio_disable_func(pfunction);
1021 sdio_release_host(pfunction);
1022fail_free_adapter:
1023 rsi_91x_deinit(adapter);
1024 rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__);
1025 return status;
1026}
1027
1028static void ulp_read_write(struct rsi_hw *adapter, u16 addr, u32 data,
1029 u16 len_in_bits)
1030{
1031 rsi_sdio_master_reg_write(adapter, RSI_GSPI_DATA_REG1,
1032 ((addr << 6) | ((data >> 16) & 0xffff)), 2);
1033 rsi_sdio_master_reg_write(adapter, RSI_GSPI_DATA_REG0,
1034 (data & 0xffff), 2);
1035 rsi_sdio_master_reg_write(adapter, RSI_GSPI_CTRL_REG0,
1036 RSI_GSPI_CTRL_REG0_VALUE, 2);
1037 rsi_sdio_master_reg_write(adapter, RSI_GSPI_CTRL_REG1,
1038 ((len_in_bits - 1) | RSI_GSPI_TRIG), 2);
1039 msleep(20);
1040}
1041
1042/*This function resets and re-initializes the chip.*/
1043static void rsi_reset_chip(struct rsi_hw *adapter)
1044{
1045 __le32 data;
1046 u8 sdio_interrupt_status = 0;
1047 u8 request = 1;
1048 int ret;
1049
1050 rsi_dbg(INFO_ZONE, "Writing disable to wakeup register\n");
1051 ret = rsi_sdio_write_register(adapter, 0, SDIO_WAKEUP_REG, &request);
1052 if (ret < 0) {
1053 rsi_dbg(ERR_ZONE,
1054 "%s: Failed to write SDIO wakeup register\n", __func__);
1055 return;
1056 }
1057 msleep(20);
1058 ret = rsi_sdio_read_register(adapter, RSI_FN1_INT_REGISTER,
1059 &sdio_interrupt_status);
1060 if (ret < 0) {
1061 rsi_dbg(ERR_ZONE, "%s: Failed to Read Intr Status Register\n",
1062 __func__);
1063 return;
1064 }
1065 rsi_dbg(INFO_ZONE, "%s: Intr Status Register value = %d\n",
1066 __func__, sdio_interrupt_status);
1067
1068 /* Put Thread-Arch processor on hold */
1069 if (rsi_sdio_master_access_msword(adapter, TA_BASE_ADDR)) {
1070 rsi_dbg(ERR_ZONE,
1071 "%s: Unable to set ms word to common reg\n",
1072 __func__);
1073 return;
1074 }
1075
1076 data = TA_HOLD_THREAD_VALUE;
1077 if (rsi_sdio_write_register_multiple(adapter, TA_HOLD_THREAD_REG |
1078 RSI_SD_REQUEST_MASTER,
1079 (u8 *)&data, 4)) {
1080 rsi_dbg(ERR_ZONE,
1081 "%s: Unable to hold Thread-Arch processor threads\n",
1082 __func__);
1083 return;
1084 }
1085
1086 /* This msleep will ensure Thread-Arch processor to go to hold
1087 * and any pending dma transfers to rf spi in device to finish.
1088 */
1089 msleep(100);
1090
1091 ulp_read_write(adapter, RSI_ULP_RESET_REG, RSI_ULP_WRITE_0, 32);
1092 ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_1, RSI_ULP_WRITE_2, 32);
1093 ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_2, RSI_ULP_WRITE_0, 32);
1094 ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_1, RSI_ULP_WRITE_50,
1095 32);
1096 ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_2, RSI_ULP_WRITE_0,
1097 32);
1098 ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_ENABLE,
1099 RSI_ULP_TIMER_ENABLE, 32);
1100 /* This msleep will be sufficient for the ulp
1101 * read write operations to complete for chip reset.
1102 */
1103 msleep(500);
1104}
1105
1106/**
1107 * rsi_disconnect() - This function performs the reverse of the probe function.
1108 * @pfunction: Pointer to the sdio_func structure.
1109 *
1110 * Return: void.
1111 */
1112static void rsi_disconnect(struct sdio_func *pfunction)
1113{
1114 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1115 struct rsi_91x_sdiodev *dev;
1116
1117 if (!adapter)
1118 return;
1119
1120 dev = (struct rsi_91x_sdiodev *)adapter->rsi_dev;
1121
1122 rsi_kill_thread(&dev->rx_thread);
1123 sdio_claim_host(pfunction);
1124 sdio_release_irq(pfunction);
1125 sdio_release_host(pfunction);
1126 mdelay(10);
1127
1128 rsi_mac80211_detach(adapter);
1129 mdelay(10);
1130
1131 /* Reset Chip */
1132 rsi_reset_chip(adapter);
1133
1134 /* Resetting to take care of the case, where-in driver is re-loaded */
1135 sdio_claim_host(pfunction);
1136 rsi_reset_card(pfunction);
1137 sdio_disable_func(pfunction);
1138 sdio_release_host(pfunction);
1139 dev->write_fail = 2;
1140 rsi_91x_deinit(adapter);
1141 rsi_dbg(ERR_ZONE, "##### RSI SDIO device disconnected #####\n");
1142
1143}
1144
1145#ifdef CONFIG_PM
1146static int rsi_set_sdio_pm_caps(struct rsi_hw *adapter)
1147{
1148 struct rsi_91x_sdiodev *dev =
1149 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
1150 struct sdio_func *func = dev->pfunction;
1151 int ret;
1152
1153 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1154 if (ret)
1155 rsi_dbg(ERR_ZONE, "Set sdio keep pwr flag failed: %d\n", ret);
1156
1157 return ret;
1158}
1159
1160static int rsi_sdio_disable_interrupts(struct sdio_func *pfunc)
1161{
1162 struct rsi_hw *adapter = sdio_get_drvdata(pfunc);
1163 u8 isr_status = 0, data = 0;
1164 int ret;
1165 unsigned long t1;
1166
1167 rsi_dbg(INFO_ZONE, "Waiting for interrupts to be cleared..");
1168 t1 = jiffies;
1169 do {
1170 rsi_sdio_read_register(adapter, RSI_FN1_INT_REGISTER,
1171 &isr_status);
1172 rsi_dbg(INFO_ZONE, ".");
1173 } while ((isr_status) && (jiffies_to_msecs(jiffies - t1) < 20));
1174 rsi_dbg(INFO_ZONE, "Interrupts cleared\n");
1175
1176 sdio_claim_host(pfunc);
1177 ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1178 if (ret < 0) {
1179 rsi_dbg(ERR_ZONE,
1180 "%s: Failed to read int enable register\n",
1181 __func__);
1182 goto done;
1183 }
1184
1185 data &= RSI_INT_ENABLE_MASK;
1186 ret = rsi_cmd52writebyte(pfunc->card, RSI_INT_ENABLE_REGISTER, data);
1187 if (ret < 0) {
1188 rsi_dbg(ERR_ZONE,
1189 "%s: Failed to write to int enable register\n",
1190 __func__);
1191 goto done;
1192 }
1193 ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1194 if (ret < 0) {
1195 rsi_dbg(ERR_ZONE,
1196 "%s: Failed to read int enable register\n",
1197 __func__);
1198 goto done;
1199 }
1200 rsi_dbg(INFO_ZONE, "int enable reg content = %x\n", data);
1201
1202done:
1203 sdio_release_host(pfunc);
1204 return ret;
1205}
1206
1207static int rsi_sdio_enable_interrupts(struct sdio_func *pfunc)
1208{
1209 u8 data;
1210 int ret;
1211 struct rsi_hw *adapter = sdio_get_drvdata(pfunc);
1212 struct rsi_common *common = adapter->priv;
1213
1214 sdio_claim_host(pfunc);
1215 ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1216 if (ret < 0) {
1217 rsi_dbg(ERR_ZONE,
1218 "%s: Failed to read int enable register\n", __func__);
1219 goto done;
1220 }
1221
1222 data |= ~RSI_INT_ENABLE_MASK & 0xff;
1223
1224 ret = rsi_cmd52writebyte(pfunc->card, RSI_INT_ENABLE_REGISTER, data);
1225 if (ret < 0) {
1226 rsi_dbg(ERR_ZONE,
1227 "%s: Failed to write to int enable register\n",
1228 __func__);
1229 goto done;
1230 }
1231
1232 if ((common->wow_flags & RSI_WOW_ENABLED) &&
1233 (common->wow_flags & RSI_WOW_NO_CONNECTION))
1234 rsi_dbg(ERR_ZONE,
1235 "##### Device can not wake up through WLAN\n");
1236
1237 ret = rsi_cmd52readbyte(pfunc->card, RSI_INT_ENABLE_REGISTER, &data);
1238 if (ret < 0) {
1239 rsi_dbg(ERR_ZONE,
1240 "%s: Failed to read int enable register\n", __func__);
1241 goto done;
1242 }
1243 rsi_dbg(INFO_ZONE, "int enable reg content = %x\n", data);
1244
1245done:
1246 sdio_release_host(pfunc);
1247 return ret;
1248}
1249
1250static int rsi_suspend(struct device *dev)
1251{
1252 int ret;
1253 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1254 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1255 struct rsi_common *common;
1256
1257 if (!adapter) {
1258 rsi_dbg(ERR_ZONE, "Device is not ready\n");
1259 return -ENODEV;
1260 }
1261 common = adapter->priv;
1262 rsi_sdio_disable_interrupts(pfunction);
1263
1264 ret = rsi_set_sdio_pm_caps(adapter);
1265 if (ret)
1266 rsi_dbg(INFO_ZONE,
1267 "Setting power management caps failed\n");
1268 common->fsm_state = FSM_CARD_NOT_READY;
1269
1270 return 0;
1271}
1272
1273static int rsi_resume(struct device *dev)
1274{
1275 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1276 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1277 struct rsi_common *common = adapter->priv;
1278
1279 common->fsm_state = FSM_MAC_INIT_DONE;
1280 rsi_sdio_enable_interrupts(pfunction);
1281
1282 return 0;
1283}
1284
1285static int rsi_freeze(struct device *dev)
1286{
1287 int ret;
1288 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1289 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1290 struct rsi_common *common;
1291 struct rsi_91x_sdiodev *sdev;
1292
1293 rsi_dbg(INFO_ZONE, "SDIO Bus freeze ===>\n");
1294
1295 if (!adapter) {
1296 rsi_dbg(ERR_ZONE, "Device is not ready\n");
1297 return -ENODEV;
1298 }
1299 common = adapter->priv;
1300 sdev = (struct rsi_91x_sdiodev *)adapter->rsi_dev;
1301
1302 if ((common->wow_flags & RSI_WOW_ENABLED) &&
1303 (common->wow_flags & RSI_WOW_NO_CONNECTION))
1304 rsi_dbg(ERR_ZONE,
1305 "##### Device can not wake up through WLAN\n");
1306
1307 ret = rsi_sdio_disable_interrupts(pfunction);
1308
1309 if (sdev->write_fail)
1310 rsi_dbg(INFO_ZONE, "###### Device is not ready #######\n");
1311
1312 ret = rsi_set_sdio_pm_caps(adapter);
1313 if (ret)
1314 rsi_dbg(INFO_ZONE, "Setting power management caps failed\n");
1315
1316 rsi_dbg(INFO_ZONE, "***** RSI module freezed *****\n");
1317
1318 return 0;
1319}
1320
1321static int rsi_thaw(struct device *dev)
1322{
1323 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1324 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1325 struct rsi_common *common = adapter->priv;
1326
1327 rsi_dbg(ERR_ZONE, "SDIO Bus thaw =====>\n");
1328
1329 common->hibernate_resume = true;
1330 common->fsm_state = FSM_CARD_NOT_READY;
1331 common->iface_down = true;
1332
1333 rsi_sdio_enable_interrupts(pfunction);
1334
1335 rsi_dbg(INFO_ZONE, "***** RSI module thaw done *****\n");
1336
1337 return 0;
1338}
1339
1340static void rsi_shutdown(struct device *dev)
1341{
1342 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1343 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1344 struct rsi_91x_sdiodev *sdev =
1345 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
1346 struct ieee80211_hw *hw = adapter->hw;
1347 struct cfg80211_wowlan *wowlan = hw->wiphy->wowlan_config;
1348
1349 rsi_dbg(ERR_ZONE, "SDIO Bus shutdown =====>\n");
1350
1351 if (rsi_config_wowlan(adapter, wowlan))
1352 rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
1353
1354 rsi_sdio_disable_interrupts(sdev->pfunction);
1355
1356 if (sdev->write_fail)
1357 rsi_dbg(INFO_ZONE, "###### Device is not ready #######\n");
1358
1359 if (rsi_set_sdio_pm_caps(adapter))
1360 rsi_dbg(INFO_ZONE, "Setting power management caps failed\n");
1361
1362 rsi_dbg(INFO_ZONE, "***** RSI module shut down *****\n");
1363}
1364
1365static int rsi_restore(struct device *dev)
1366{
1367 struct sdio_func *pfunction = dev_to_sdio_func(dev);
1368 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1369 struct rsi_common *common = adapter->priv;
1370
1371 rsi_dbg(INFO_ZONE, "SDIO Bus restore ======>\n");
1372 common->hibernate_resume = true;
1373 common->fsm_state = FSM_FW_NOT_LOADED;
1374 common->iface_down = true;
1375
1376 adapter->sc_nvifs = 0;
1377 ieee80211_restart_hw(adapter->hw);
1378
1379 common->wow_flags = 0;
1380 common->iface_down = false;
1381
1382 rsi_dbg(INFO_ZONE, "RSI module restored\n");
1383
1384 return 0;
1385}
1386static const struct dev_pm_ops rsi_pm_ops = {
1387 .suspend = rsi_suspend,
1388 .resume = rsi_resume,
1389 .freeze = rsi_freeze,
1390 .thaw = rsi_thaw,
1391 .restore = rsi_restore,
1392};
1393#endif
1394
1395static const struct sdio_device_id rsi_dev_table[] = {
1396 { SDIO_DEVICE(0x303, 0x100) },
1397 { SDIO_DEVICE(0x041B, 0x0301) },
1398 { SDIO_DEVICE(0x041B, 0x0201) },
1399 { SDIO_DEVICE(0x041B, 0x9330) },
1400 { /* Blank */},
1401};
1402
1403static struct sdio_driver rsi_driver = {
1404 .name = "RSI-SDIO WLAN",
1405 .probe = rsi_probe,
1406 .remove = rsi_disconnect,
1407 .id_table = rsi_dev_table,
1408#ifdef CONFIG_PM
1409 .drv = {
1410 .pm = &rsi_pm_ops,
1411 .shutdown = rsi_shutdown,
1412 }
1413#endif
1414};
1415
1416/**
1417 * rsi_module_init() - This function registers the sdio module.
1418 * @void: Void.
1419 *
1420 * Return: 0 on success.
1421 */
1422static int rsi_module_init(void)
1423{
1424 int ret;
1425
1426 ret = sdio_register_driver(&rsi_driver);
1427 rsi_dbg(INIT_ZONE, "%s: Registering driver\n", __func__);
1428 return ret;
1429}
1430
1431/**
1432 * rsi_module_exit() - This function unregisters the sdio module.
1433 * @void: Void.
1434 *
1435 * Return: None.
1436 */
1437static void rsi_module_exit(void)
1438{
1439 sdio_unregister_driver(&rsi_driver);
1440 rsi_dbg(INFO_ZONE, "%s: Unregistering driver\n", __func__);
1441}
1442
1443module_init(rsi_module_init);
1444module_exit(rsi_module_exit);
1445
1446MODULE_AUTHOR("Redpine Signals Inc");
1447MODULE_DESCRIPTION("Common SDIO layer for RSI drivers");
1448MODULE_SUPPORTED_DEVICE("RSI-91x");
1449MODULE_DEVICE_TABLE(sdio, rsi_dev_table);
1450MODULE_FIRMWARE(FIRMWARE_RSI9113);
1451MODULE_VERSION("0.1");
1452MODULE_LICENSE("Dual BSD/GPL");