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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
22/**
23 * rsi_sdio_set_cmd52_arg() - This function prepares cmd 52 read/write arg.
24 * @rw: Read/write
25 * @func: function number
26 * @raw: indicates whether to perform read after write
27 * @address: address to which to read/write
28 * @writedata: data to write
29 *
30 * Return: argument
31 */
32static u32 rsi_sdio_set_cmd52_arg(bool rw,
33 u8 func,
34 u8 raw,
35 u32 address,
36 u8 writedata)
37{
38 return ((rw & 1) << 31) | ((func & 0x7) << 28) |
39 ((raw & 1) << 27) | (1 << 26) |
40 ((address & 0x1FFFF) << 9) | (1 << 8) |
41 (writedata & 0xFF);
42}
43
44/**
45 * rsi_cmd52writebyte() - This function issues cmd52 byte write onto the card.
46 * @card: Pointer to the mmc_card.
47 * @address: Address to write.
48 * @byte: Data to write.
49 *
50 * Return: Write status.
51 */
52static int rsi_cmd52writebyte(struct mmc_card *card,
53 u32 address,
54 u8 byte)
55{
56 struct mmc_command io_cmd;
57 u32 arg;
58
59 memset(&io_cmd, 0, sizeof(io_cmd));
60 arg = rsi_sdio_set_cmd52_arg(1, 0, 0, address, byte);
61 io_cmd.opcode = SD_IO_RW_DIRECT;
62 io_cmd.arg = arg;
63 io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
64
65 return mmc_wait_for_cmd(card->host, &io_cmd, 0);
66}
67
68/**
69 * rsi_cmd52readbyte() - This function issues cmd52 byte read onto the card.
70 * @card: Pointer to the mmc_card.
71 * @address: Address to read from.
72 * @byte: Variable to store read value.
73 *
74 * Return: Read status.
75 */
76static int rsi_cmd52readbyte(struct mmc_card *card,
77 u32 address,
78 u8 *byte)
79{
80 struct mmc_command io_cmd;
81 u32 arg;
82 int err;
83
84 memset(&io_cmd, 0, sizeof(io_cmd));
85 arg = rsi_sdio_set_cmd52_arg(0, 0, 0, address, 0);
86 io_cmd.opcode = SD_IO_RW_DIRECT;
87 io_cmd.arg = arg;
88 io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
89
90 err = mmc_wait_for_cmd(card->host, &io_cmd, 0);
91 if ((!err) && (byte))
92 *byte = io_cmd.resp[0] & 0xFF;
93 return err;
94}
95
96/**
97 * rsi_issue_sdiocommand() - This function issues sdio commands.
98 * @func: Pointer to the sdio_func structure.
99 * @opcode: Opcode value.
100 * @arg: Arguments to pass.
101 * @flags: Flags which are set.
102 * @resp: Pointer to store response.
103 *
104 * Return: err: command status as 0 or -1.
105 */
106static int rsi_issue_sdiocommand(struct sdio_func *func,
107 u32 opcode,
108 u32 arg,
109 u32 flags,
110 u32 *resp)
111{
112 struct mmc_command cmd;
113 struct mmc_host *host;
114 int err;
115
116 host = func->card->host;
117
118 memset(&cmd, 0, sizeof(struct mmc_command));
119 cmd.opcode = opcode;
120 cmd.arg = arg;
121 cmd.flags = flags;
122 err = mmc_wait_for_cmd(host, &cmd, 3);
123
124 if ((!err) && (resp))
125 *resp = cmd.resp[0];
126
127 return err;
128}
129
130/**
131 * rsi_handle_interrupt() - This function is called upon the occurence
132 * of an interrupt.
133 * @function: Pointer to the sdio_func structure.
134 *
135 * Return: None.
136 */
137static void rsi_handle_interrupt(struct sdio_func *function)
138{
139 struct rsi_hw *adapter = sdio_get_drvdata(function);
140
141 sdio_release_host(function);
142 rsi_interrupt_handler(adapter);
143 sdio_claim_host(function);
144}
145
146/**
147 * rsi_reset_card() - This function resets and re-initializes the card.
148 * @pfunction: Pointer to the sdio_func structure.
149 *
150 * Return: None.
151 */
152static void rsi_reset_card(struct sdio_func *pfunction)
153{
154 int ret = 0;
155 int err;
156 struct mmc_card *card = pfunction->card;
157 struct mmc_host *host = card->host;
158 s32 bit = (fls(host->ocr_avail) - 1);
159 u8 cmd52_resp;
160 u32 clock, resp, i;
161 u16 rca;
162
163 /* Reset 9110 chip */
164 ret = rsi_cmd52writebyte(pfunction->card,
165 SDIO_CCCR_ABORT,
166 (1 << 3));
167
168 /* Card will not send any response as it is getting reset immediately
169 * Hence expect a timeout status from host controller
170 */
171 if (ret != -ETIMEDOUT)
172 rsi_dbg(ERR_ZONE, "%s: Reset failed : %d\n", __func__, ret);
173
174 /* Wait for few milli seconds to get rid of residue charges if any */
175 msleep(20);
176
177 /* Initialize the SDIO card */
178 host->ios.vdd = bit;
179 host->ios.chip_select = MMC_CS_DONTCARE;
180 host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
181 host->ios.power_mode = MMC_POWER_UP;
182 host->ios.bus_width = MMC_BUS_WIDTH_1;
183 host->ios.timing = MMC_TIMING_LEGACY;
184 host->ops->set_ios(host, &host->ios);
185
186 /*
187 * This delay should be sufficient to allow the power supply
188 * to reach the minimum voltage.
189 */
190 msleep(20);
191
192 host->ios.clock = host->f_min;
193 host->ios.power_mode = MMC_POWER_ON;
194 host->ops->set_ios(host, &host->ios);
195
196 /*
197 * This delay must be at least 74 clock sizes, or 1 ms, or the
198 * time required to reach a stable voltage.
199 */
200 msleep(20);
201
202 /* Issue CMD0. Goto idle state */
203 host->ios.chip_select = MMC_CS_HIGH;
204 host->ops->set_ios(host, &host->ios);
205 msleep(20);
206 err = rsi_issue_sdiocommand(pfunction,
207 MMC_GO_IDLE_STATE,
208 0,
209 (MMC_RSP_NONE | MMC_CMD_BC),
210 NULL);
211 host->ios.chip_select = MMC_CS_DONTCARE;
212 host->ops->set_ios(host, &host->ios);
213 msleep(20);
214 host->use_spi_crc = 0;
215
216 if (err)
217 rsi_dbg(ERR_ZONE, "%s: CMD0 failed : %d\n", __func__, err);
218
219 if (!host->ocr_avail) {
220 /* Issue CMD5, arg = 0 */
221 err = rsi_issue_sdiocommand(pfunction,
222 SD_IO_SEND_OP_COND,
223 0,
224 (MMC_RSP_R4 | MMC_CMD_BCR),
225 &resp);
226 if (err)
227 rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n",
228 __func__, err);
229 host->ocr_avail = resp;
230 }
231
232 /* Issue CMD5, arg = ocr. Wait till card is ready */
233 for (i = 0; i < 100; i++) {
234 err = rsi_issue_sdiocommand(pfunction,
235 SD_IO_SEND_OP_COND,
236 host->ocr_avail,
237 (MMC_RSP_R4 | MMC_CMD_BCR),
238 &resp);
239 if (err) {
240 rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n",
241 __func__, err);
242 break;
243 }
244
245 if (resp & MMC_CARD_BUSY)
246 break;
247 msleep(20);
248 }
249
250 if ((i == 100) || (err)) {
251 rsi_dbg(ERR_ZONE, "%s: card in not ready : %d %d\n",
252 __func__, i, err);
253 return;
254 }
255
256 /* Issue CMD3, get RCA */
257 err = rsi_issue_sdiocommand(pfunction,
258 SD_SEND_RELATIVE_ADDR,
259 0,
260 (MMC_RSP_R6 | MMC_CMD_BCR),
261 &resp);
262 if (err) {
263 rsi_dbg(ERR_ZONE, "%s: CMD3 failed : %d\n", __func__, err);
264 return;
265 }
266 rca = resp >> 16;
267 host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
268 host->ops->set_ios(host, &host->ios);
269
270 /* Issue CMD7, select card */
271 err = rsi_issue_sdiocommand(pfunction,
272 MMC_SELECT_CARD,
273 (rca << 16),
274 (MMC_RSP_R1 | MMC_CMD_AC),
275 NULL);
276 if (err) {
277 rsi_dbg(ERR_ZONE, "%s: CMD7 failed : %d\n", __func__, err);
278 return;
279 }
280
281 /* Enable high speed */
282 if (card->host->caps & MMC_CAP_SD_HIGHSPEED) {
283 rsi_dbg(ERR_ZONE, "%s: Set high speed mode\n", __func__);
284 err = rsi_cmd52readbyte(card, SDIO_CCCR_SPEED, &cmd52_resp);
285 if (err) {
286 rsi_dbg(ERR_ZONE, "%s: CCCR speed reg read failed: %d\n",
287 __func__, err);
288 card->state &= ~MMC_STATE_HIGHSPEED;
289 } else {
290 err = rsi_cmd52writebyte(card,
291 SDIO_CCCR_SPEED,
292 (cmd52_resp | SDIO_SPEED_EHS));
293 if (err) {
294 rsi_dbg(ERR_ZONE,
295 "%s: CCR speed regwrite failed %d\n",
296 __func__, err);
297 return;
298 }
299 mmc_card_set_highspeed(card);
300 host->ios.timing = MMC_TIMING_SD_HS;
301 host->ops->set_ios(host, &host->ios);
302 }
303 }
304
305 /* Set clock */
306 if (mmc_card_highspeed(card))
307 clock = 50000000;
308 else
309 clock = card->cis.max_dtr;
310
311 if (clock > host->f_max)
312 clock = host->f_max;
313
314 host->ios.clock = clock;
315 host->ops->set_ios(host, &host->ios);
316
317 if (card->host->caps & MMC_CAP_4_BIT_DATA) {
318 /* CMD52: Set bus width & disable card detect resistor */
319 err = rsi_cmd52writebyte(card,
320 SDIO_CCCR_IF,
321 (SDIO_BUS_CD_DISABLE |
322 SDIO_BUS_WIDTH_4BIT));
323 if (err) {
324 rsi_dbg(ERR_ZONE, "%s: Set bus mode failed : %d\n",
325 __func__, err);
326 return;
327 }
328 host->ios.bus_width = MMC_BUS_WIDTH_4;
329 host->ops->set_ios(host, &host->ios);
330 }
331}
332
333/**
334 * rsi_setclock() - This function sets the clock frequency.
335 * @adapter: Pointer to the adapter structure.
336 * @freq: Clock frequency.
337 *
338 * Return: None.
339 */
340static void rsi_setclock(struct rsi_hw *adapter, u32 freq)
341{
342 struct rsi_91x_sdiodev *dev =
343 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
344 struct mmc_host *host = dev->pfunction->card->host;
345 u32 clock;
346
347 clock = freq * 1000;
348 if (clock > host->f_max)
349 clock = host->f_max;
350 host->ios.clock = clock;
351 host->ops->set_ios(host, &host->ios);
352}
353
354/**
355 * rsi_setblocklength() - This function sets the host block length.
356 * @adapter: Pointer to the adapter structure.
357 * @length: Block length to be set.
358 *
359 * Return: status: 0 on success, -1 on failure.
360 */
361static int rsi_setblocklength(struct rsi_hw *adapter, u32 length)
362{
363 struct rsi_91x_sdiodev *dev =
364 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
365 int status;
366 rsi_dbg(INIT_ZONE, "%s: Setting the block length\n", __func__);
367
368 status = sdio_set_block_size(dev->pfunction, length);
369 dev->pfunction->max_blksize = 256;
370
371 rsi_dbg(INFO_ZONE,
372 "%s: Operational blk length is %d\n", __func__, length);
373 return status;
374}
375
376/**
377 * rsi_setupcard() - This function queries and sets the card's features.
378 * @adapter: Pointer to the adapter structure.
379 *
380 * Return: status: 0 on success, -1 on failure.
381 */
382static int rsi_setupcard(struct rsi_hw *adapter)
383{
384 struct rsi_91x_sdiodev *dev =
385 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
386 int status = 0;
387
388 rsi_setclock(adapter, 50000);
389
390 dev->tx_blk_size = 256;
391 status = rsi_setblocklength(adapter, dev->tx_blk_size);
392 if (status)
393 rsi_dbg(ERR_ZONE,
394 "%s: Unable to set block length\n", __func__);
395 return status;
396}
397
398/**
399 * rsi_sdio_read_register() - This function reads one byte of information
400 * from a register.
401 * @adapter: Pointer to the adapter structure.
402 * @addr: Address of the register.
403 * @data: Pointer to the data that stores the data read.
404 *
405 * Return: 0 on success, -1 on failure.
406 */
407int rsi_sdio_read_register(struct rsi_hw *adapter,
408 u32 addr,
409 u8 *data)
410{
411 struct rsi_91x_sdiodev *dev =
412 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
413 u8 fun_num = 0;
414 int status;
415
416 sdio_claim_host(dev->pfunction);
417
418 if (fun_num == 0)
419 *data = sdio_f0_readb(dev->pfunction, addr, &status);
420 else
421 *data = sdio_readb(dev->pfunction, addr, &status);
422
423 sdio_release_host(dev->pfunction);
424
425 return status;
426}
427
428/**
429 * rsi_sdio_write_register() - This function writes one byte of information
430 * into a register.
431 * @adapter: Pointer to the adapter structure.
432 * @function: Function Number.
433 * @addr: Address of the register.
434 * @data: Pointer to the data tha has to be written.
435 *
436 * Return: 0 on success, -1 on failure.
437 */
438int rsi_sdio_write_register(struct rsi_hw *adapter,
439 u8 function,
440 u32 addr,
441 u8 *data)
442{
443 struct rsi_91x_sdiodev *dev =
444 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
445 int status = 0;
446
447 sdio_claim_host(dev->pfunction);
448
449 if (function == 0)
450 sdio_f0_writeb(dev->pfunction, *data, addr, &status);
451 else
452 sdio_writeb(dev->pfunction, *data, addr, &status);
453
454 sdio_release_host(dev->pfunction);
455
456 return status;
457}
458
459/**
460 * rsi_sdio_ack_intr() - This function acks the interrupt received.
461 * @adapter: Pointer to the adapter structure.
462 * @int_bit: Interrupt bit to write into register.
463 *
464 * Return: None.
465 */
466void rsi_sdio_ack_intr(struct rsi_hw *adapter, u8 int_bit)
467{
468 int status;
469 status = rsi_sdio_write_register(adapter,
470 1,
471 (SDIO_FUN1_INTR_CLR_REG |
472 RSI_SD_REQUEST_MASTER),
473 &int_bit);
474 if (status)
475 rsi_dbg(ERR_ZONE, "%s: unable to send ack\n", __func__);
476}
477
478
479
480/**
481 * rsi_sdio_read_register_multiple() - This function read multiple bytes of
482 * information from the SD card.
483 * @adapter: Pointer to the adapter structure.
484 * @addr: Address of the register.
485 * @count: Number of multiple bytes to be read.
486 * @data: Pointer to the read data.
487 *
488 * Return: 0 on success, -1 on failure.
489 */
490static int rsi_sdio_read_register_multiple(struct rsi_hw *adapter,
491 u32 addr,
492 u32 count,
493 u8 *data)
494{
495 struct rsi_91x_sdiodev *dev =
496 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
497 u32 status;
498
499 sdio_claim_host(dev->pfunction);
500
501 status = sdio_readsb(dev->pfunction, data, addr, count);
502
503 sdio_release_host(dev->pfunction);
504
505 if (status != 0)
506 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 read failed\n", __func__);
507 return status;
508}
509
510/**
511 * rsi_sdio_write_register_multiple() - This function writes multiple bytes of
512 * information to the SD card.
513 * @adapter: Pointer to the adapter structure.
514 * @addr: Address of the register.
515 * @data: Pointer to the data that has to be written.
516 * @count: Number of multiple bytes to be written.
517 *
518 * Return: 0 on success, -1 on failure.
519 */
520int rsi_sdio_write_register_multiple(struct rsi_hw *adapter,
521 u32 addr,
522 u8 *data,
523 u32 count)
524{
525 struct rsi_91x_sdiodev *dev =
526 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
527 int status;
528
529 if (dev->write_fail > 1) {
530 rsi_dbg(ERR_ZONE, "%s: Stopping card writes\n", __func__);
531 return 0;
532 } else if (dev->write_fail == 1) {
533 /**
534 * Assuming it is a CRC failure, we want to allow another
535 * card write
536 */
537 rsi_dbg(ERR_ZONE, "%s: Continue card writes\n", __func__);
538 dev->write_fail++;
539 }
540
541 sdio_claim_host(dev->pfunction);
542
543 status = sdio_writesb(dev->pfunction, addr, data, count);
544
545 sdio_release_host(dev->pfunction);
546
547 if (status) {
548 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 write failed %d\n",
549 __func__, status);
550 dev->write_fail = 2;
551 } else {
552 memcpy(dev->prev_desc, data, FRAME_DESC_SZ);
553 }
554 return status;
555}
556
557/**
558 * rsi_sdio_host_intf_write_pkt() - This function writes the packet to device.
559 * @adapter: Pointer to the adapter structure.
560 * @pkt: Pointer to the data to be written on to the device.
561 * @len: length of the data to be written on to the device.
562 *
563 * Return: 0 on success, -1 on failure.
564 */
565static int rsi_sdio_host_intf_write_pkt(struct rsi_hw *adapter,
566 u8 *pkt,
567 u32 len)
568{
569 struct rsi_91x_sdiodev *dev =
570 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
571 u32 block_size = dev->tx_blk_size;
572 u32 num_blocks, address, length;
573 u32 queueno;
574 int status;
575
576 queueno = ((pkt[1] >> 4) & 0xf);
577
578 num_blocks = len / block_size;
579
580 if (len % block_size)
581 num_blocks++;
582
583 address = (num_blocks * block_size | (queueno << 12));
584 length = num_blocks * block_size;
585
586 status = rsi_sdio_write_register_multiple(adapter,
587 address,
588 (u8 *)pkt,
589 length);
590 if (status)
591 rsi_dbg(ERR_ZONE, "%s: Unable to write onto the card: %d\n",
592 __func__, status);
593 rsi_dbg(DATA_TX_ZONE, "%s: Successfully written onto card\n", __func__);
594 return status;
595}
596
597/**
598 * rsi_sdio_host_intf_read_pkt() - This function reads the packet
599 from the device.
600 * @adapter: Pointer to the adapter data structure.
601 * @pkt: Pointer to the packet data to be read from the the device.
602 * @length: Length of the data to be read from the device.
603 *
604 * Return: 0 on success, -1 on failure.
605 */
606int rsi_sdio_host_intf_read_pkt(struct rsi_hw *adapter,
607 u8 *pkt,
608 u32 length)
609{
610 int status = -EINVAL;
611
612 if (!length) {
613 rsi_dbg(ERR_ZONE, "%s: Pkt size is zero\n", __func__);
614 return status;
615 }
616
617 status = rsi_sdio_read_register_multiple(adapter,
618 length,
619 length, /*num of bytes*/
620 (u8 *)pkt);
621
622 if (status)
623 rsi_dbg(ERR_ZONE, "%s: Failed to read frame: %d\n", __func__,
624 status);
625 return status;
626}
627
628/**
629 * rsi_init_sdio_interface() - This function does init specific to SDIO.
630 *
631 * @adapter: Pointer to the adapter data structure.
632 * @pkt: Pointer to the packet data to be read from the the device.
633 *
634 * Return: 0 on success, -1 on failure.
635 */
636
637static int rsi_init_sdio_interface(struct rsi_hw *adapter,
638 struct sdio_func *pfunction)
639{
640 struct rsi_91x_sdiodev *rsi_91x_dev;
641 int status = -ENOMEM;
642
643 rsi_91x_dev = kzalloc(sizeof(*rsi_91x_dev), GFP_KERNEL);
644 if (!rsi_91x_dev)
645 return status;
646
647 adapter->rsi_dev = rsi_91x_dev;
648
649 sdio_claim_host(pfunction);
650
651 pfunction->enable_timeout = 100;
652 status = sdio_enable_func(pfunction);
653 if (status) {
654 rsi_dbg(ERR_ZONE, "%s: Failed to enable interface\n", __func__);
655 sdio_release_host(pfunction);
656 return status;
657 }
658
659 rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__);
660
661 rsi_91x_dev->pfunction = pfunction;
662 adapter->device = &pfunction->dev;
663
664 sdio_set_drvdata(pfunction, adapter);
665
666 status = rsi_setupcard(adapter);
667 if (status) {
668 rsi_dbg(ERR_ZONE, "%s: Failed to setup card\n", __func__);
669 goto fail;
670 }
671
672 rsi_dbg(INIT_ZONE, "%s: Setup card succesfully\n", __func__);
673
674 status = rsi_init_sdio_slave_regs(adapter);
675 if (status) {
676 rsi_dbg(ERR_ZONE, "%s: Failed to init slave regs\n", __func__);
677 goto fail;
678 }
679 sdio_release_host(pfunction);
680
681 adapter->host_intf_write_pkt = rsi_sdio_host_intf_write_pkt;
682 adapter->host_intf_read_pkt = rsi_sdio_host_intf_read_pkt;
683 adapter->determine_event_timeout = rsi_sdio_determine_event_timeout;
684 adapter->check_hw_queue_status = rsi_sdio_read_buffer_status_register;
685
686#ifdef CONFIG_RSI_DEBUGFS
687 adapter->num_debugfs_entries = MAX_DEBUGFS_ENTRIES;
688#endif
689 return status;
690fail:
691 sdio_disable_func(pfunction);
692 sdio_release_host(pfunction);
693 return status;
694}
695
696/**
697 * rsi_probe() - This function is called by kernel when the driver provided
698 * Vendor and device IDs are matched. All the initialization
699 * work is done here.
700 * @pfunction: Pointer to the sdio_func structure.
701 * @id: Pointer to sdio_device_id structure.
702 *
703 * Return: 0 on success, 1 on failure.
704 */
705static int rsi_probe(struct sdio_func *pfunction,
706 const struct sdio_device_id *id)
707{
708 struct rsi_hw *adapter;
709
710 rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__);
711
712 adapter = rsi_91x_init();
713 if (!adapter) {
714 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n",
715 __func__);
716 return 1;
717 }
718
719 if (rsi_init_sdio_interface(adapter, pfunction)) {
720 rsi_dbg(ERR_ZONE, "%s: Failed to init sdio interface\n",
721 __func__);
722 goto fail;
723 }
724
725 if (rsi_sdio_device_init(adapter->priv)) {
726 rsi_dbg(ERR_ZONE, "%s: Failed in device init\n", __func__);
727 sdio_claim_host(pfunction);
728 sdio_disable_func(pfunction);
729 sdio_release_host(pfunction);
730 goto fail;
731 }
732
733 sdio_claim_host(pfunction);
734 if (sdio_claim_irq(pfunction, rsi_handle_interrupt)) {
735 rsi_dbg(ERR_ZONE, "%s: Failed to request IRQ\n", __func__);
736 sdio_release_host(pfunction);
737 goto fail;
738 }
739
740 sdio_release_host(pfunction);
741 rsi_dbg(INIT_ZONE, "%s: Registered Interrupt handler\n", __func__);
742
743 return 0;
744fail:
745 rsi_91x_deinit(adapter);
746 rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__);
747 return 1;
748}
749
750/**
751 * rsi_disconnect() - This function performs the reverse of the probe function.
752 * @pfunction: Pointer to the sdio_func structure.
753 *
754 * Return: void.
755 */
756static void rsi_disconnect(struct sdio_func *pfunction)
757{
758 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
759 struct rsi_91x_sdiodev *dev;
760
761 if (!adapter)
762 return;
763
764 dev = (struct rsi_91x_sdiodev *)adapter->rsi_dev;
765
766 dev->write_fail = 2;
767 rsi_mac80211_detach(adapter);
768
769 sdio_claim_host(pfunction);
770 sdio_release_irq(pfunction);
771 sdio_disable_func(pfunction);
772 rsi_91x_deinit(adapter);
773 /* Resetting to take care of the case, where-in driver is re-loaded */
774 rsi_reset_card(pfunction);
775 sdio_release_host(pfunction);
776}
777
778#ifdef CONFIG_PM
779static int rsi_suspend(struct device *dev)
780{
781 /* Not yet implemented */
782 return -ENOSYS;
783}
784
785static int rsi_resume(struct device *dev)
786{
787 /* Not yet implemented */
788 return -ENOSYS;
789}
790
791static const struct dev_pm_ops rsi_pm_ops = {
792 .suspend = rsi_suspend,
793 .resume = rsi_resume,
794};
795#endif
796
797static const struct sdio_device_id rsi_dev_table[] = {
798 { SDIO_DEVICE(0x303, 0x100) },
799 { SDIO_DEVICE(0x041B, 0x0301) },
800 { SDIO_DEVICE(0x041B, 0x0201) },
801 { SDIO_DEVICE(0x041B, 0x9330) },
802 { /* Blank */},
803};
804
805static struct sdio_driver rsi_driver = {
806 .name = "RSI-SDIO WLAN",
807 .probe = rsi_probe,
808 .remove = rsi_disconnect,
809 .id_table = rsi_dev_table,
810#ifdef CONFIG_PM
811 .drv = {
812 .pm = &rsi_pm_ops,
813 }
814#endif
815};
816
817/**
818 * rsi_module_init() - This function registers the sdio module.
819 * @void: Void.
820 *
821 * Return: 0 on success.
822 */
823static int rsi_module_init(void)
824{
825 sdio_register_driver(&rsi_driver);
826 rsi_dbg(INIT_ZONE, "%s: Registering driver\n", __func__);
827 return 0;
828}
829
830/**
831 * rsi_module_exit() - This function unregisters the sdio module.
832 * @void: Void.
833 *
834 * Return: None.
835 */
836static void rsi_module_exit(void)
837{
838 sdio_unregister_driver(&rsi_driver);
839 rsi_dbg(INFO_ZONE, "%s: Unregistering driver\n", __func__);
840}
841
842module_init(rsi_module_init);
843module_exit(rsi_module_exit);
844
845MODULE_AUTHOR("Redpine Signals Inc");
846MODULE_DESCRIPTION("Common SDIO layer for RSI drivers");
847MODULE_SUPPORTED_DEVICE("RSI-91x");
848MODULE_DEVICE_TABLE(sdio, rsi_dev_table);
849MODULE_FIRMWARE(FIRMWARE_RSI9113);
850MODULE_VERSION("0.1");
851MODULE_LICENSE("Dual BSD/GPL");