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_hal.h"
22
23 /**
24 * rsi_sdio_set_cmd52_arg() - This function prepares cmd 52 read/write arg.
25 * @rw: Read/write
26 * @func: function number
27 * @raw: indicates whether to perform read after write
28 * @address: address to which to read/write
29 * @writedata: data to write
30 *
31 * Return: argument
32 */
rsi_sdio_set_cmd52_arg(bool rw,u8 func,u8 raw,u32 address,u8 writedata)33 static u32 rsi_sdio_set_cmd52_arg(bool rw,
34 u8 func,
35 u8 raw,
36 u32 address,
37 u8 writedata)
38 {
39 return ((rw & 1) << 31) | ((func & 0x7) << 28) |
40 ((raw & 1) << 27) | (1 << 26) |
41 ((address & 0x1FFFF) << 9) | (1 << 8) |
42 (writedata & 0xFF);
43 }
44
45 /**
46 * rsi_cmd52writebyte() - This function issues cmd52 byte write onto the card.
47 * @card: Pointer to the mmc_card.
48 * @address: Address to write.
49 * @byte: Data to write.
50 *
51 * Return: Write status.
52 */
rsi_cmd52writebyte(struct mmc_card * card,u32 address,u8 byte)53 static int rsi_cmd52writebyte(struct mmc_card *card,
54 u32 address,
55 u8 byte)
56 {
57 struct mmc_command io_cmd;
58 u32 arg;
59
60 memset(&io_cmd, 0, sizeof(io_cmd));
61 arg = rsi_sdio_set_cmd52_arg(1, 0, 0, address, byte);
62 io_cmd.opcode = SD_IO_RW_DIRECT;
63 io_cmd.arg = arg;
64 io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
65
66 return mmc_wait_for_cmd(card->host, &io_cmd, 0);
67 }
68
69 /**
70 * rsi_cmd52readbyte() - This function issues cmd52 byte read onto the card.
71 * @card: Pointer to the mmc_card.
72 * @address: Address to read from.
73 * @byte: Variable to store read value.
74 *
75 * Return: Read status.
76 */
rsi_cmd52readbyte(struct mmc_card * card,u32 address,u8 * byte)77 static int rsi_cmd52readbyte(struct mmc_card *card,
78 u32 address,
79 u8 *byte)
80 {
81 struct mmc_command io_cmd;
82 u32 arg;
83 int err;
84
85 memset(&io_cmd, 0, sizeof(io_cmd));
86 arg = rsi_sdio_set_cmd52_arg(0, 0, 0, address, 0);
87 io_cmd.opcode = SD_IO_RW_DIRECT;
88 io_cmd.arg = arg;
89 io_cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
90
91 err = mmc_wait_for_cmd(card->host, &io_cmd, 0);
92 if ((!err) && (byte))
93 *byte = io_cmd.resp[0] & 0xFF;
94 return err;
95 }
96
97 /**
98 * rsi_issue_sdiocommand() - This function issues sdio commands.
99 * @func: Pointer to the sdio_func structure.
100 * @opcode: Opcode value.
101 * @arg: Arguments to pass.
102 * @flags: Flags which are set.
103 * @resp: Pointer to store response.
104 *
105 * Return: err: command status as 0 or -1.
106 */
rsi_issue_sdiocommand(struct sdio_func * func,u32 opcode,u32 arg,u32 flags,u32 * resp)107 static int rsi_issue_sdiocommand(struct sdio_func *func,
108 u32 opcode,
109 u32 arg,
110 u32 flags,
111 u32 *resp)
112 {
113 struct mmc_command cmd;
114 struct mmc_host *host;
115 int err;
116
117 host = func->card->host;
118
119 memset(&cmd, 0, sizeof(struct mmc_command));
120 cmd.opcode = opcode;
121 cmd.arg = arg;
122 cmd.flags = flags;
123 err = mmc_wait_for_cmd(host, &cmd, 3);
124
125 if ((!err) && (resp))
126 *resp = cmd.resp[0];
127
128 return err;
129 }
130
131 /**
132 * rsi_handle_interrupt() - This function is called upon the occurence
133 * of an interrupt.
134 * @function: Pointer to the sdio_func structure.
135 *
136 * Return: None.
137 */
rsi_handle_interrupt(struct sdio_func * function)138 static void rsi_handle_interrupt(struct sdio_func *function)
139 {
140 struct rsi_hw *adapter = sdio_get_drvdata(function);
141 struct rsi_91x_sdiodev *dev =
142 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
143
144 if (adapter->priv->fsm_state == FSM_FW_NOT_LOADED)
145 return;
146
147 dev->sdio_irq_task = current;
148 rsi_interrupt_handler(adapter);
149 dev->sdio_irq_task = NULL;
150 }
151
152 /**
153 * rsi_reset_card() - This function resets and re-initializes the card.
154 * @pfunction: Pointer to the sdio_func structure.
155 *
156 * Return: None.
157 */
rsi_reset_card(struct sdio_func * pfunction)158 static void rsi_reset_card(struct sdio_func *pfunction)
159 {
160 int ret = 0;
161 int err;
162 struct mmc_card *card = pfunction->card;
163 struct mmc_host *host = card->host;
164 u8 cmd52_resp;
165 u32 clock, resp, i;
166 u16 rca;
167
168 /* Reset 9110 chip */
169 ret = rsi_cmd52writebyte(pfunction->card,
170 SDIO_CCCR_ABORT,
171 (1 << 3));
172
173 /* Card will not send any response as it is getting reset immediately
174 * Hence expect a timeout status from host controller
175 */
176 if (ret != -ETIMEDOUT)
177 rsi_dbg(ERR_ZONE, "%s: Reset failed : %d\n", __func__, ret);
178
179 /* Wait for few milli seconds to get rid of residue charges if any */
180 msleep(20);
181
182 /* Initialize the SDIO card */
183 host->ios.chip_select = MMC_CS_DONTCARE;
184 host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
185 host->ios.power_mode = MMC_POWER_UP;
186 host->ios.bus_width = MMC_BUS_WIDTH_1;
187 host->ios.timing = MMC_TIMING_LEGACY;
188 host->ops->set_ios(host, &host->ios);
189
190 /*
191 * This delay should be sufficient to allow the power supply
192 * to reach the minimum voltage.
193 */
194 msleep(20);
195
196 host->ios.clock = host->f_min;
197 host->ios.power_mode = MMC_POWER_ON;
198 host->ops->set_ios(host, &host->ios);
199
200 /*
201 * This delay must be at least 74 clock sizes, or 1 ms, or the
202 * time required to reach a stable voltage.
203 */
204 msleep(20);
205
206 /* Issue CMD0. Goto idle state */
207 host->ios.chip_select = MMC_CS_HIGH;
208 host->ops->set_ios(host, &host->ios);
209 msleep(20);
210 err = rsi_issue_sdiocommand(pfunction,
211 MMC_GO_IDLE_STATE,
212 0,
213 (MMC_RSP_NONE | MMC_CMD_BC),
214 NULL);
215 host->ios.chip_select = MMC_CS_DONTCARE;
216 host->ops->set_ios(host, &host->ios);
217 msleep(20);
218 host->use_spi_crc = 0;
219
220 if (err)
221 rsi_dbg(ERR_ZONE, "%s: CMD0 failed : %d\n", __func__, err);
222
223 /* Issue CMD5, arg = 0 */
224 err = rsi_issue_sdiocommand(pfunction, SD_IO_SEND_OP_COND, 0,
225 (MMC_RSP_R4 | MMC_CMD_BCR), &resp);
226 if (err)
227 rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n", __func__, err);
228 card->ocr = resp;
229
230 /* Issue CMD5, arg = ocr. Wait till card is ready */
231 for (i = 0; i < 100; i++) {
232 err = rsi_issue_sdiocommand(pfunction, SD_IO_SEND_OP_COND,
233 card->ocr,
234 (MMC_RSP_R4 | MMC_CMD_BCR), &resp);
235 if (err) {
236 rsi_dbg(ERR_ZONE, "%s: CMD5 failed : %d\n",
237 __func__, err);
238 break;
239 }
240
241 if (resp & MMC_CARD_BUSY)
242 break;
243 msleep(20);
244 }
245
246 if ((i == 100) || (err)) {
247 rsi_dbg(ERR_ZONE, "%s: card in not ready : %d %d\n",
248 __func__, i, err);
249 return;
250 }
251
252 /* Issue CMD3, get RCA */
253 err = rsi_issue_sdiocommand(pfunction,
254 SD_SEND_RELATIVE_ADDR,
255 0,
256 (MMC_RSP_R6 | MMC_CMD_BCR),
257 &resp);
258 if (err) {
259 rsi_dbg(ERR_ZONE, "%s: CMD3 failed : %d\n", __func__, err);
260 return;
261 }
262 rca = resp >> 16;
263 host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
264 host->ops->set_ios(host, &host->ios);
265
266 /* Issue CMD7, select card */
267 err = rsi_issue_sdiocommand(pfunction,
268 MMC_SELECT_CARD,
269 (rca << 16),
270 (MMC_RSP_R1 | MMC_CMD_AC),
271 NULL);
272 if (err) {
273 rsi_dbg(ERR_ZONE, "%s: CMD7 failed : %d\n", __func__, err);
274 return;
275 }
276
277 /* Enable high speed */
278 if (card->host->caps & MMC_CAP_SD_HIGHSPEED) {
279 rsi_dbg(ERR_ZONE, "%s: Set high speed mode\n", __func__);
280 err = rsi_cmd52readbyte(card, SDIO_CCCR_SPEED, &cmd52_resp);
281 if (err) {
282 rsi_dbg(ERR_ZONE, "%s: CCCR speed reg read failed: %d\n",
283 __func__, err);
284 } else {
285 err = rsi_cmd52writebyte(card,
286 SDIO_CCCR_SPEED,
287 (cmd52_resp | SDIO_SPEED_EHS));
288 if (err) {
289 rsi_dbg(ERR_ZONE,
290 "%s: CCR speed regwrite failed %d\n",
291 __func__, err);
292 return;
293 }
294 host->ios.timing = MMC_TIMING_SD_HS;
295 host->ops->set_ios(host, &host->ios);
296 }
297 }
298
299 /* Set clock */
300 if (mmc_card_hs(card))
301 clock = 50000000;
302 else
303 clock = card->cis.max_dtr;
304
305 if (clock > host->f_max)
306 clock = host->f_max;
307
308 host->ios.clock = clock;
309 host->ops->set_ios(host, &host->ios);
310
311 if (card->host->caps & MMC_CAP_4_BIT_DATA) {
312 /* CMD52: Set bus width & disable card detect resistor */
313 err = rsi_cmd52writebyte(card,
314 SDIO_CCCR_IF,
315 (SDIO_BUS_CD_DISABLE |
316 SDIO_BUS_WIDTH_4BIT));
317 if (err) {
318 rsi_dbg(ERR_ZONE, "%s: Set bus mode failed : %d\n",
319 __func__, err);
320 return;
321 }
322 host->ios.bus_width = MMC_BUS_WIDTH_4;
323 host->ops->set_ios(host, &host->ios);
324 }
325 }
326
327 /**
328 * rsi_setclock() - This function sets the clock frequency.
329 * @adapter: Pointer to the adapter structure.
330 * @freq: Clock frequency.
331 *
332 * Return: None.
333 */
rsi_setclock(struct rsi_hw * adapter,u32 freq)334 static void rsi_setclock(struct rsi_hw *adapter, u32 freq)
335 {
336 struct rsi_91x_sdiodev *dev =
337 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
338 struct mmc_host *host = dev->pfunction->card->host;
339 u32 clock;
340
341 clock = freq * 1000;
342 if (clock > host->f_max)
343 clock = host->f_max;
344 host->ios.clock = clock;
345 host->ops->set_ios(host, &host->ios);
346 }
347
348 /**
349 * rsi_setblocklength() - This function sets the host block length.
350 * @adapter: Pointer to the adapter structure.
351 * @length: Block length to be set.
352 *
353 * Return: status: 0 on success, -1 on failure.
354 */
rsi_setblocklength(struct rsi_hw * adapter,u32 length)355 static int rsi_setblocklength(struct rsi_hw *adapter, u32 length)
356 {
357 struct rsi_91x_sdiodev *dev =
358 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
359 int status;
360 rsi_dbg(INIT_ZONE, "%s: Setting the block length\n", __func__);
361
362 status = sdio_set_block_size(dev->pfunction, length);
363 dev->pfunction->max_blksize = 256;
364 adapter->block_size = dev->pfunction->max_blksize;
365
366 rsi_dbg(INFO_ZONE,
367 "%s: Operational blk length is %d\n", __func__, length);
368 return status;
369 }
370
371 /**
372 * rsi_setupcard() - This function queries and sets the card's features.
373 * @adapter: Pointer to the adapter structure.
374 *
375 * Return: status: 0 on success, -1 on failure.
376 */
rsi_setupcard(struct rsi_hw * adapter)377 static int rsi_setupcard(struct rsi_hw *adapter)
378 {
379 struct rsi_91x_sdiodev *dev =
380 (struct rsi_91x_sdiodev *)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 */
rsi_sdio_read_register(struct rsi_hw * adapter,u32 addr,u8 * data)402 int rsi_sdio_read_register(struct rsi_hw *adapter,
403 u32 addr,
404 u8 *data)
405 {
406 struct rsi_91x_sdiodev *dev =
407 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
408 u8 fun_num = 0;
409 int status;
410
411 if (likely(dev->sdio_irq_task != current))
412 sdio_claim_host(dev->pfunction);
413
414 if (fun_num == 0)
415 *data = sdio_f0_readb(dev->pfunction, addr, &status);
416 else
417 *data = sdio_readb(dev->pfunction, addr, &status);
418
419 if (likely(dev->sdio_irq_task != current))
420 sdio_release_host(dev->pfunction);
421
422 return status;
423 }
424
425 /**
426 * rsi_sdio_write_register() - This function writes one byte of information
427 * into a register.
428 * @adapter: Pointer to the adapter structure.
429 * @function: Function Number.
430 * @addr: Address of the register.
431 * @data: Pointer to the data tha has to be written.
432 *
433 * Return: 0 on success, -1 on failure.
434 */
rsi_sdio_write_register(struct rsi_hw * adapter,u8 function,u32 addr,u8 * data)435 int rsi_sdio_write_register(struct rsi_hw *adapter,
436 u8 function,
437 u32 addr,
438 u8 *data)
439 {
440 struct rsi_91x_sdiodev *dev =
441 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
442 int status = 0;
443
444 if (likely(dev->sdio_irq_task != current))
445 sdio_claim_host(dev->pfunction);
446
447 if (function == 0)
448 sdio_f0_writeb(dev->pfunction, *data, addr, &status);
449 else
450 sdio_writeb(dev->pfunction, *data, addr, &status);
451
452 if (likely(dev->sdio_irq_task != current))
453 sdio_release_host(dev->pfunction);
454
455 return status;
456 }
457
458 /**
459 * rsi_sdio_ack_intr() - This function acks the interrupt received.
460 * @adapter: Pointer to the adapter structure.
461 * @int_bit: Interrupt bit to write into register.
462 *
463 * Return: None.
464 */
rsi_sdio_ack_intr(struct rsi_hw * adapter,u8 int_bit)465 void rsi_sdio_ack_intr(struct rsi_hw *adapter, u8 int_bit)
466 {
467 int status;
468 status = rsi_sdio_write_register(adapter,
469 1,
470 (SDIO_FUN1_INTR_CLR_REG |
471 RSI_SD_REQUEST_MASTER),
472 &int_bit);
473 if (status)
474 rsi_dbg(ERR_ZONE, "%s: unable to send ack\n", __func__);
475 }
476
477
478
479 /**
480 * rsi_sdio_read_register_multiple() - This function read multiple bytes of
481 * information from the SD card.
482 * @adapter: Pointer to the adapter structure.
483 * @addr: Address of the register.
484 * @count: Number of multiple bytes to be read.
485 * @data: Pointer to the read data.
486 *
487 * Return: 0 on success, -1 on failure.
488 */
rsi_sdio_read_register_multiple(struct rsi_hw * adapter,u32 addr,u8 * data,u16 count)489 static int rsi_sdio_read_register_multiple(struct rsi_hw *adapter,
490 u32 addr,
491 u8 *data,
492 u16 count)
493 {
494 struct rsi_91x_sdiodev *dev =
495 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
496 u32 status;
497
498 if (likely(dev->sdio_irq_task != current))
499 sdio_claim_host(dev->pfunction);
500
501 status = sdio_readsb(dev->pfunction, data, addr, count);
502
503 if (likely(dev->sdio_irq_task != current))
504 sdio_release_host(dev->pfunction);
505
506 if (status != 0)
507 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 read failed\n", __func__);
508 return status;
509 }
510
511 /**
512 * rsi_sdio_write_register_multiple() - This function writes multiple bytes of
513 * information to the SD card.
514 * @adapter: Pointer to the adapter structure.
515 * @addr: Address of the register.
516 * @data: Pointer to the data that has to be written.
517 * @count: Number of multiple bytes to be written.
518 *
519 * Return: 0 on success, -1 on failure.
520 */
rsi_sdio_write_register_multiple(struct rsi_hw * adapter,u32 addr,u8 * data,u16 count)521 int rsi_sdio_write_register_multiple(struct rsi_hw *adapter,
522 u32 addr,
523 u8 *data,
524 u16 count)
525 {
526 struct rsi_91x_sdiodev *dev =
527 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
528 int status;
529
530 if (dev->write_fail > 1) {
531 rsi_dbg(ERR_ZONE, "%s: Stopping card writes\n", __func__);
532 return 0;
533 } else if (dev->write_fail == 1) {
534 /**
535 * Assuming it is a CRC failure, we want to allow another
536 * card write
537 */
538 rsi_dbg(ERR_ZONE, "%s: Continue card writes\n", __func__);
539 dev->write_fail++;
540 }
541
542 if (likely(dev->sdio_irq_task != current))
543 sdio_claim_host(dev->pfunction);
544
545 status = sdio_writesb(dev->pfunction, addr, data, count);
546
547 if (likely(dev->sdio_irq_task != current))
548 sdio_release_host(dev->pfunction);
549
550 if (status) {
551 rsi_dbg(ERR_ZONE, "%s: Synch Cmd53 write failed %d\n",
552 __func__, status);
553 dev->write_fail = 2;
554 } else {
555 memcpy(dev->prev_desc, data, FRAME_DESC_SZ);
556 }
557 return status;
558 }
559
rsi_sdio_load_data_master_write(struct rsi_hw * adapter,u32 base_address,u32 instructions_sz,u16 block_size,u8 * ta_firmware)560 static int rsi_sdio_load_data_master_write(struct rsi_hw *adapter,
561 u32 base_address,
562 u32 instructions_sz,
563 u16 block_size,
564 u8 *ta_firmware)
565 {
566 u32 num_blocks, offset, i;
567 u16 msb_address, lsb_address;
568 u8 temp_buf[block_size];
569 int status;
570
571 num_blocks = instructions_sz / block_size;
572 msb_address = base_address >> 16;
573
574 rsi_dbg(INFO_ZONE, "ins_size: %d, num_blocks: %d\n",
575 instructions_sz, num_blocks);
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 return status;
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 return status;
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 return status;
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 return status;
625 rsi_dbg(INFO_ZONE,
626 "Written Last Block in Address 0x%x Successfully\n",
627 offset | RSI_SD_REQUEST_MASTER);
628 }
629 return 0;
630 }
631
632 #define FLASH_SIZE_ADDR 0x04000016
rsi_sdio_master_reg_read(struct rsi_hw * adapter,u32 addr,u32 * read_buf,u16 size)633 static int rsi_sdio_master_reg_read(struct rsi_hw *adapter, u32 addr,
634 u32 *read_buf, u16 size)
635 {
636 u32 addr_on_bus, *data;
637 u16 ms_addr;
638 int status;
639
640 data = kzalloc(RSI_MASTER_REG_BUF_SIZE, GFP_KERNEL);
641 if (!data)
642 return -ENOMEM;
643
644 data = PTR_ALIGN(data, 8);
645
646 ms_addr = (addr >> 16);
647 status = rsi_sdio_master_access_msword(adapter, ms_addr);
648 if (status < 0) {
649 rsi_dbg(ERR_ZONE,
650 "%s: Unable to set ms word to common reg\n",
651 __func__);
652 goto err;
653 }
654 addr &= 0xFFFF;
655
656 addr_on_bus = (addr & 0xFF000000);
657 if ((addr_on_bus == (FLASH_SIZE_ADDR & 0xFF000000)) ||
658 (addr_on_bus == 0x0))
659 addr_on_bus = (addr & ~(0x3));
660 else
661 addr_on_bus = addr;
662
663 /* Bring TA out of reset */
664 status = rsi_sdio_read_register_multiple
665 (adapter,
666 (addr_on_bus | RSI_SD_REQUEST_MASTER),
667 (u8 *)data, 4);
668 if (status < 0) {
669 rsi_dbg(ERR_ZONE, "%s: AHB register read failed\n", __func__);
670 goto err;
671 }
672 if (size == 2) {
673 if ((addr & 0x3) == 0)
674 *read_buf = *data;
675 else
676 *read_buf = (*data >> 16);
677 *read_buf = (*read_buf & 0xFFFF);
678 } else if (size == 1) {
679 if ((addr & 0x3) == 0)
680 *read_buf = *data;
681 else if ((addr & 0x3) == 1)
682 *read_buf = (*data >> 8);
683 else if ((addr & 0x3) == 2)
684 *read_buf = (*data >> 16);
685 else
686 *read_buf = (*data >> 24);
687 *read_buf = (*read_buf & 0xFF);
688 } else {
689 *read_buf = *data;
690 }
691
692 err:
693 kfree(data);
694 return status;
695 }
696
rsi_sdio_master_reg_write(struct rsi_hw * adapter,unsigned long addr,unsigned long data,u16 size)697 static int rsi_sdio_master_reg_write(struct rsi_hw *adapter,
698 unsigned long addr,
699 unsigned long data, u16 size)
700 {
701 unsigned long *data_aligned;
702 int status;
703
704 data_aligned = kzalloc(RSI_MASTER_REG_BUF_SIZE, GFP_KERNEL);
705 if (!data_aligned)
706 return -ENOMEM;
707
708 data_aligned = PTR_ALIGN(data_aligned, 8);
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 */
rsi_sdio_host_intf_write_pkt(struct rsi_hw * adapter,u8 * pkt,u32 len)753 static int rsi_sdio_host_intf_write_pkt(struct rsi_hw *adapter,
754 u8 *pkt,
755 u32 len)
756 {
757 struct rsi_91x_sdiodev *dev =
758 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
759 u32 block_size = dev->tx_blk_size;
760 u32 num_blocks, address, length;
761 u32 queueno;
762 int status;
763
764 queueno = ((pkt[1] >> 4) & 0xf);
765
766 num_blocks = len / block_size;
767
768 if (len % block_size)
769 num_blocks++;
770
771 address = (num_blocks * block_size | (queueno << 12));
772 length = num_blocks * block_size;
773
774 status = rsi_sdio_write_register_multiple(adapter,
775 address,
776 (u8 *)pkt,
777 length);
778 if (status)
779 rsi_dbg(ERR_ZONE, "%s: Unable to write onto the card: %d\n",
780 __func__, status);
781 rsi_dbg(DATA_TX_ZONE, "%s: Successfully written onto card\n", __func__);
782 return status;
783 }
784
785 /**
786 * rsi_sdio_host_intf_read_pkt() - This function reads the packet
787 from the device.
788 * @adapter: Pointer to the adapter data structure.
789 * @pkt: Pointer to the packet data to be read from the the device.
790 * @length: Length of the data to be read from the device.
791 *
792 * Return: 0 on success, -1 on failure.
793 */
rsi_sdio_host_intf_read_pkt(struct rsi_hw * adapter,u8 * pkt,u32 length)794 int rsi_sdio_host_intf_read_pkt(struct rsi_hw *adapter,
795 u8 *pkt,
796 u32 length)
797 {
798 int status = -EINVAL;
799
800 if (!length) {
801 rsi_dbg(ERR_ZONE, "%s: Pkt size is zero\n", __func__);
802 return status;
803 }
804
805 status = rsi_sdio_read_register_multiple(adapter,
806 length,
807 (u8 *)pkt,
808 length); /*num of bytes*/
809
810 if (status)
811 rsi_dbg(ERR_ZONE, "%s: Failed to read frame: %d\n", __func__,
812 status);
813 return status;
814 }
815
816 /**
817 * rsi_init_sdio_interface() - This function does init specific to SDIO.
818 *
819 * @adapter: Pointer to the adapter data structure.
820 * @pkt: Pointer to the packet data to be read from the the device.
821 *
822 * Return: 0 on success, -1 on failure.
823 */
824
rsi_init_sdio_interface(struct rsi_hw * adapter,struct sdio_func * pfunction)825 static 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 = -ENOMEM;
830
831 rsi_91x_dev = kzalloc(sizeof(*rsi_91x_dev), GFP_KERNEL);
832 if (!rsi_91x_dev)
833 return status;
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 succesfully\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 status;
876 fail:
877 sdio_disable_func(pfunction);
878 sdio_release_host(pfunction);
879 return status;
880 }
881
882 static struct rsi_host_intf_ops sdio_host_intf_ops = {
883 .write_pkt = rsi_sdio_host_intf_write_pkt,
884 .read_pkt = rsi_sdio_host_intf_read_pkt,
885 .master_access_msword = rsi_sdio_master_access_msword,
886 .read_reg_multiple = rsi_sdio_read_register_multiple,
887 .write_reg_multiple = rsi_sdio_write_register_multiple,
888 .master_reg_read = rsi_sdio_master_reg_read,
889 .master_reg_write = rsi_sdio_master_reg_write,
890 .load_data_master_write = rsi_sdio_load_data_master_write,
891 };
892
893 /**
894 * rsi_probe() - This function is called by kernel when the driver provided
895 * Vendor and device IDs are matched. All the initialization
896 * work is done here.
897 * @pfunction: Pointer to the sdio_func structure.
898 * @id: Pointer to sdio_device_id structure.
899 *
900 * Return: 0 on success, 1 on failure.
901 */
rsi_probe(struct sdio_func * pfunction,const struct sdio_device_id * id)902 static int rsi_probe(struct sdio_func *pfunction,
903 const struct sdio_device_id *id)
904 {
905 struct rsi_hw *adapter;
906
907 rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__);
908
909 adapter = rsi_91x_init();
910 if (!adapter) {
911 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n",
912 __func__);
913 return 1;
914 }
915 adapter->rsi_host_intf = RSI_HOST_INTF_SDIO;
916 adapter->host_intf_ops = &sdio_host_intf_ops;
917
918 if (rsi_init_sdio_interface(adapter, pfunction)) {
919 rsi_dbg(ERR_ZONE, "%s: Failed to init sdio interface\n",
920 __func__);
921 goto fail;
922 }
923 sdio_claim_host(pfunction);
924 if (sdio_claim_irq(pfunction, rsi_handle_interrupt)) {
925 rsi_dbg(ERR_ZONE, "%s: Failed to request IRQ\n", __func__);
926 sdio_release_host(pfunction);
927 goto fail;
928 }
929 sdio_release_host(pfunction);
930 rsi_dbg(INIT_ZONE, "%s: Registered Interrupt handler\n", __func__);
931
932 if (rsi_hal_device_init(adapter)) {
933 rsi_dbg(ERR_ZONE, "%s: Failed in device init\n", __func__);
934 sdio_claim_host(pfunction);
935 sdio_release_irq(pfunction);
936 sdio_disable_func(pfunction);
937 sdio_release_host(pfunction);
938 goto fail;
939 }
940 rsi_dbg(INFO_ZONE, "===> RSI Device Init Done <===\n");
941
942 if (rsi_sdio_master_access_msword(adapter, MISC_CFG_BASE_ADDR)) {
943 rsi_dbg(ERR_ZONE, "%s: Unable to set ms word reg\n", __func__);
944 return -EIO;
945 }
946
947 return 0;
948 fail:
949 rsi_91x_deinit(adapter);
950 rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__);
951 return 1;
952 }
953
ulp_read_write(struct rsi_hw * adapter,u16 addr,u32 data,u16 len_in_bits)954 static void ulp_read_write(struct rsi_hw *adapter, u16 addr, u32 data,
955 u16 len_in_bits)
956 {
957 rsi_sdio_master_reg_write(adapter, RSI_GSPI_DATA_REG1,
958 ((addr << 6) | ((data >> 16) & 0xffff)), 2);
959 rsi_sdio_master_reg_write(adapter, RSI_GSPI_DATA_REG0,
960 (data & 0xffff), 2);
961 rsi_sdio_master_reg_write(adapter, RSI_GSPI_CTRL_REG0,
962 RSI_GSPI_CTRL_REG0_VALUE, 2);
963 rsi_sdio_master_reg_write(adapter, RSI_GSPI_CTRL_REG1,
964 ((len_in_bits - 1) | RSI_GSPI_TRIG), 2);
965 msleep(20);
966 }
967
968 /*This function resets and re-initializes the chip.*/
rsi_reset_chip(struct rsi_hw * adapter)969 static void rsi_reset_chip(struct rsi_hw *adapter)
970 {
971 u8 *data;
972 u8 sdio_interrupt_status = 0;
973 u8 request = 1;
974 int ret;
975
976 data = kzalloc(sizeof(u32), GFP_KERNEL);
977 if (!data)
978 return;
979
980 rsi_dbg(INFO_ZONE, "Writing disable to wakeup register\n");
981 ret = rsi_sdio_write_register(adapter, 0, SDIO_WAKEUP_REG, &request);
982 if (ret < 0) {
983 rsi_dbg(ERR_ZONE,
984 "%s: Failed to write SDIO wakeup register\n", __func__);
985 goto err;
986 }
987 msleep(20);
988 ret = rsi_sdio_read_register(adapter, RSI_FN1_INT_REGISTER,
989 &sdio_interrupt_status);
990 if (ret < 0) {
991 rsi_dbg(ERR_ZONE, "%s: Failed to Read Intr Status Register\n",
992 __func__);
993 goto err;
994 }
995 rsi_dbg(INFO_ZONE, "%s: Intr Status Register value = %d\n",
996 __func__, sdio_interrupt_status);
997
998 /* Put Thread-Arch processor on hold */
999 if (rsi_sdio_master_access_msword(adapter, TA_BASE_ADDR)) {
1000 rsi_dbg(ERR_ZONE,
1001 "%s: Unable to set ms word to common reg\n",
1002 __func__);
1003 goto err;
1004 }
1005
1006 put_unaligned_le32(TA_HOLD_THREAD_VALUE, data);
1007 if (rsi_sdio_write_register_multiple(adapter, TA_HOLD_THREAD_REG |
1008 RSI_SD_REQUEST_MASTER,
1009 data, 4)) {
1010 rsi_dbg(ERR_ZONE,
1011 "%s: Unable to hold Thread-Arch processor threads\n",
1012 __func__);
1013 goto err;
1014 }
1015
1016 /* This msleep will ensure Thread-Arch processor to go to hold
1017 * and any pending dma transfers to rf spi in device to finish.
1018 */
1019 msleep(100);
1020
1021 ulp_read_write(adapter, RSI_ULP_RESET_REG, RSI_ULP_WRITE_0, 32);
1022 ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_1, RSI_ULP_WRITE_2, 32);
1023 ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_2, RSI_ULP_WRITE_0, 32);
1024 ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_1, RSI_ULP_WRITE_50,
1025 32);
1026 ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_2, RSI_ULP_WRITE_0,
1027 32);
1028 ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_ENABLE,
1029 RSI_ULP_TIMER_ENABLE, 32);
1030 /* This msleep will be sufficient for the ulp
1031 * read write operations to complete for chip reset.
1032 */
1033 msleep(500);
1034 err:
1035 kfree(data);
1036 return;
1037 }
1038
1039 /**
1040 * rsi_disconnect() - This function performs the reverse of the probe function.
1041 * @pfunction: Pointer to the sdio_func structure.
1042 *
1043 * Return: void.
1044 */
rsi_disconnect(struct sdio_func * pfunction)1045 static void rsi_disconnect(struct sdio_func *pfunction)
1046 {
1047 struct rsi_hw *adapter = sdio_get_drvdata(pfunction);
1048 struct rsi_91x_sdiodev *dev;
1049
1050 if (!adapter)
1051 return;
1052
1053 dev = (struct rsi_91x_sdiodev *)adapter->rsi_dev;
1054 sdio_claim_host(pfunction);
1055 sdio_release_irq(pfunction);
1056 sdio_release_host(pfunction);
1057 mdelay(10);
1058
1059 rsi_mac80211_detach(adapter);
1060 mdelay(10);
1061
1062 /* Reset Chip */
1063 rsi_reset_chip(adapter);
1064
1065 /* Resetting to take care of the case, where-in driver is re-loaded */
1066 sdio_claim_host(pfunction);
1067 rsi_reset_card(pfunction);
1068 sdio_disable_func(pfunction);
1069 sdio_release_host(pfunction);
1070 dev->write_fail = 2;
1071 rsi_91x_deinit(adapter);
1072 rsi_dbg(ERR_ZONE, "##### RSI SDIO device disconnected #####\n");
1073
1074 }
1075
1076 #ifdef CONFIG_PM
rsi_suspend(struct device * dev)1077 static int rsi_suspend(struct device *dev)
1078 {
1079 /* Not yet implemented */
1080 return -ENOSYS;
1081 }
1082
rsi_resume(struct device * dev)1083 static int rsi_resume(struct device *dev)
1084 {
1085 /* Not yet implemented */
1086 return -ENOSYS;
1087 }
1088
1089 static const struct dev_pm_ops rsi_pm_ops = {
1090 .suspend = rsi_suspend,
1091 .resume = rsi_resume,
1092 };
1093 #endif
1094
1095 static const struct sdio_device_id rsi_dev_table[] = {
1096 { SDIO_DEVICE(0x303, 0x100) },
1097 { SDIO_DEVICE(0x041B, 0x0301) },
1098 { SDIO_DEVICE(0x041B, 0x0201) },
1099 { SDIO_DEVICE(0x041B, 0x9330) },
1100 { /* Blank */},
1101 };
1102
1103 static struct sdio_driver rsi_driver = {
1104 .name = "RSI-SDIO WLAN",
1105 .probe = rsi_probe,
1106 .remove = rsi_disconnect,
1107 .id_table = rsi_dev_table,
1108 #ifdef CONFIG_PM
1109 .drv = {
1110 .pm = &rsi_pm_ops,
1111 }
1112 #endif
1113 };
1114
1115 /**
1116 * rsi_module_init() - This function registers the sdio module.
1117 * @void: Void.
1118 *
1119 * Return: 0 on success.
1120 */
rsi_module_init(void)1121 static int rsi_module_init(void)
1122 {
1123 int ret;
1124
1125 ret = sdio_register_driver(&rsi_driver);
1126 rsi_dbg(INIT_ZONE, "%s: Registering driver\n", __func__);
1127 return ret;
1128 }
1129
1130 /**
1131 * rsi_module_exit() - This function unregisters the sdio module.
1132 * @void: Void.
1133 *
1134 * Return: None.
1135 */
rsi_module_exit(void)1136 static void rsi_module_exit(void)
1137 {
1138 sdio_unregister_driver(&rsi_driver);
1139 rsi_dbg(INFO_ZONE, "%s: Unregistering driver\n", __func__);
1140 }
1141
1142 module_init(rsi_module_init);
1143 module_exit(rsi_module_exit);
1144
1145 MODULE_AUTHOR("Redpine Signals Inc");
1146 MODULE_DESCRIPTION("Common SDIO layer for RSI drivers");
1147 MODULE_SUPPORTED_DEVICE("RSI-91x");
1148 MODULE_DEVICE_TABLE(sdio, rsi_dev_table);
1149 MODULE_FIRMWARE(FIRMWARE_RSI9113);
1150 MODULE_VERSION("0.1");
1151 MODULE_LICENSE("Dual BSD/GPL");
1152