Merge remote-tracking branch 'asoc/topic/core' into asoc-next
[linux-2.6-block.git] / drivers / net / wireless / rsi / rsi_91x_sdio_ops.c
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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/firmware.h>
19#include "rsi_sdio.h"
20#include "rsi_common.h"
21
22/**
23 * rsi_sdio_master_access_msword() - This function sets the AHB master access
24 * MS word in the SDIO slave registers.
25 * @adapter: Pointer to the adapter structure.
26 * @ms_word: ms word need to be initialized.
27 *
28 * Return: status: 0 on success, -1 on failure.
29 */
30static int rsi_sdio_master_access_msword(struct rsi_hw *adapter,
31 u16 ms_word)
32{
33 u8 byte;
34 u8 function = 0;
35 int status = 0;
36
37 byte = (u8)(ms_word & 0x00FF);
38
39 rsi_dbg(INIT_ZONE,
40 "%s: MASTER_ACCESS_MSBYTE:0x%x\n", __func__, byte);
41
42 status = rsi_sdio_write_register(adapter,
43 function,
44 SDIO_MASTER_ACCESS_MSBYTE,
45 &byte);
46 if (status) {
47 rsi_dbg(ERR_ZONE,
48 "%s: fail to access MASTER_ACCESS_MSBYTE\n",
49 __func__);
50 return -1;
51 }
52
53 byte = (u8)(ms_word >> 8);
54
55 rsi_dbg(INIT_ZONE, "%s:MASTER_ACCESS_LSBYTE:0x%x\n", __func__, byte);
56 status = rsi_sdio_write_register(adapter,
57 function,
58 SDIO_MASTER_ACCESS_LSBYTE,
59 &byte);
60 return status;
61}
62
63/**
64 * rsi_copy_to_card() - This function includes the actual funtionality of
65 * copying the TA firmware to the card.Basically this
66 * function includes opening the TA file,reading the
67 * TA file and writing their values in blocks of data.
68 * @common: Pointer to the driver private structure.
69 * @fw: Pointer to the firmware value to be written.
70 * @len: length of firmware file.
71 * @num_blocks: Number of blocks to be written to the card.
72 *
73 * Return: 0 on success and -1 on failure.
74 */
75static int rsi_copy_to_card(struct rsi_common *common,
76 const u8 *fw,
77 u32 len,
78 u32 num_blocks)
79{
80 struct rsi_hw *adapter = common->priv;
81 struct rsi_91x_sdiodev *dev =
82 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
83 u32 indx, ii;
84 u32 block_size = dev->tx_blk_size;
85 u32 lsb_address;
86 __le32 data[] = { TA_HOLD_THREAD_VALUE, TA_SOFT_RST_CLR,
87 TA_PC_ZERO, TA_RELEASE_THREAD_VALUE };
88 u32 address[] = { TA_HOLD_THREAD_REG, TA_SOFT_RESET_REG,
89 TA_TH0_PC_REG, TA_RELEASE_THREAD_REG };
90 u32 base_address;
91 u16 msb_address;
92
93 base_address = TA_LOAD_ADDRESS;
94 msb_address = base_address >> 16;
95
96 for (indx = 0, ii = 0; ii < num_blocks; ii++, indx += block_size) {
97 lsb_address = ((u16) base_address | RSI_SD_REQUEST_MASTER);
98 if (rsi_sdio_write_register_multiple(adapter,
99 lsb_address,
100 (u8 *)(fw + indx),
101 block_size)) {
102 rsi_dbg(ERR_ZONE,
103 "%s: Unable to load %s blk\n", __func__,
104 FIRMWARE_RSI9113);
105 return -1;
106 }
107 rsi_dbg(INIT_ZONE, "%s: loading block: %d\n", __func__, ii);
108 base_address += block_size;
109 if ((base_address >> 16) != msb_address) {
110 msb_address += 1;
111 if (rsi_sdio_master_access_msword(adapter,
112 msb_address)) {
113 rsi_dbg(ERR_ZONE,
114 "%s: Unable to set ms word reg\n",
115 __func__);
116 return -1;
117 }
118 }
119 }
120
121 if (len % block_size) {
122 lsb_address = ((u16) base_address | RSI_SD_REQUEST_MASTER);
123 if (rsi_sdio_write_register_multiple(adapter,
124 lsb_address,
125 (u8 *)(fw + indx),
126 len % block_size)) {
127 rsi_dbg(ERR_ZONE,
128 "%s: Unable to load f/w\n", __func__);
129 return -1;
130 }
131 }
132 rsi_dbg(INIT_ZONE,
133 "%s: Succesfully loaded TA instructions\n", __func__);
134
135 if (rsi_sdio_master_access_msword(adapter, TA_BASE_ADDR)) {
136 rsi_dbg(ERR_ZONE,
137 "%s: Unable to set ms word to common reg\n",
138 __func__);
139 return -1;
140 }
141
142 for (ii = 0; ii < ARRAY_SIZE(data); ii++) {
143 /* Bringing TA out of reset */
144 if (rsi_sdio_write_register_multiple(adapter,
145 (address[ii] |
146 RSI_SD_REQUEST_MASTER),
147 (u8 *)&data[ii],
148 4)) {
149 rsi_dbg(ERR_ZONE,
150 "%s: Unable to hold TA threads\n", __func__);
151 return -1;
152 }
153 }
154
155 rsi_dbg(INIT_ZONE, "%s: loaded firmware\n", __func__);
156 return 0;
157}
158
159/**
160 * rsi_load_ta_instructions() - This function includes the actual funtionality
161 * of loading the TA firmware.This function also
162 * includes opening the TA file,reading the TA
163 * file and writing their value in blocks of data.
164 * @common: Pointer to the driver private structure.
165 *
166 * Return: status: 0 on success, -1 on failure.
167 */
168static int rsi_load_ta_instructions(struct rsi_common *common)
169{
170 struct rsi_hw *adapter = common->priv;
171 struct rsi_91x_sdiodev *dev =
172 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
173 u32 len;
174 u32 num_blocks;
5d5cd85f 175 const u8 *fw;
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176 const struct firmware *fw_entry = NULL;
177 u32 block_size = dev->tx_blk_size;
178 int status = 0;
179 u32 base_address;
180 u16 msb_address;
181
182 if (rsi_sdio_master_access_msword(adapter, TA_BASE_ADDR)) {
183 rsi_dbg(ERR_ZONE,
184 "%s: Unable to set ms word to common reg\n",
185 __func__);
186 return -1;
187 }
188 base_address = TA_LOAD_ADDRESS;
189 msb_address = (base_address >> 16);
190
191 if (rsi_sdio_master_access_msword(adapter, msb_address)) {
192 rsi_dbg(ERR_ZONE,
193 "%s: Unable to set ms word reg\n", __func__);
194 return -1;
195 }
196
197 status = request_firmware(&fw_entry, FIRMWARE_RSI9113, adapter->device);
198 if (status < 0) {
199 rsi_dbg(ERR_ZONE, "%s Firmware file %s not found\n",
200 __func__, FIRMWARE_RSI9113);
201 return status;
202 }
203
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204 /* Copy firmware into DMA-accessible memory */
205 fw = kmemdup(fw_entry->data, fw_entry->size, GFP_KERNEL);
206 if (!fw)
207 return -ENOMEM;
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208 len = fw_entry->size;
209
210 if (len % 4)
211 len += (4 - (len % 4));
212
213 num_blocks = (len / block_size);
214
215 rsi_dbg(INIT_ZONE, "%s: Instruction size:%d\n", __func__, len);
216 rsi_dbg(INIT_ZONE, "%s: num blocks: %d\n", __func__, num_blocks);
217
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218 status = rsi_copy_to_card(common, fw, len, num_blocks);
219 kfree(fw);
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220 release_firmware(fw_entry);
221 return status;
222}
223
224/**
225 * rsi_process_pkt() - This Function reads rx_blocks register and figures out
226 * the size of the rx pkt.
227 * @common: Pointer to the driver private structure.
228 *
229 * Return: 0 on success, -1 on failure.
230 */
231static int rsi_process_pkt(struct rsi_common *common)
232{
233 struct rsi_hw *adapter = common->priv;
234 u8 num_blks = 0;
235 u32 rcv_pkt_len = 0;
236 int status = 0;
237
238 status = rsi_sdio_read_register(adapter,
239 SDIO_RX_NUM_BLOCKS_REG,
240 &num_blks);
241
242 if (status) {
243 rsi_dbg(ERR_ZONE,
244 "%s: Failed to read pkt length from the card:\n",
245 __func__);
246 return status;
247 }
248 rcv_pkt_len = (num_blks * 256);
249
250 common->rx_data_pkt = kmalloc(rcv_pkt_len, GFP_KERNEL);
251 if (!common->rx_data_pkt) {
252 rsi_dbg(ERR_ZONE, "%s: Failed in memory allocation\n",
253 __func__);
d50c761a 254 return -ENOMEM;
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255 }
256
257 status = rsi_sdio_host_intf_read_pkt(adapter,
258 common->rx_data_pkt,
259 rcv_pkt_len);
260 if (status) {
261 rsi_dbg(ERR_ZONE, "%s: Failed to read packet from card\n",
262 __func__);
263 goto fail;
264 }
265
266 status = rsi_read_pkt(common, rcv_pkt_len);
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267
268fail:
269 kfree(common->rx_data_pkt);
d50c761a 270 return status;
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271}
272
273/**
274 * rsi_init_sdio_slave_regs() - This function does the actual initialization
275 * of SDBUS slave registers.
276 * @adapter: Pointer to the adapter structure.
277 *
278 * Return: status: 0 on success, -1 on failure.
279 */
280int rsi_init_sdio_slave_regs(struct rsi_hw *adapter)
281{
282 struct rsi_91x_sdiodev *dev =
283 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
284 u8 function = 0;
285 u8 byte;
286 int status = 0;
287
288 if (dev->next_read_delay) {
289 byte = dev->next_read_delay;
290 status = rsi_sdio_write_register(adapter,
291 function,
292 SDIO_NXT_RD_DELAY2,
293 &byte);
294 if (status) {
295 rsi_dbg(ERR_ZONE,
296 "%s: Failed to write SDIO_NXT_RD_DELAY2\n",
297 __func__);
298 return -1;
299 }
300 }
301
302 if (dev->sdio_high_speed_enable) {
303 rsi_dbg(INIT_ZONE, "%s: Enabling SDIO High speed\n", __func__);
304 byte = 0x3;
305
306 status = rsi_sdio_write_register(adapter,
307 function,
308 SDIO_REG_HIGH_SPEED,
309 &byte);
310 if (status) {
311 rsi_dbg(ERR_ZONE,
312 "%s: Failed to enable SDIO high speed\n",
313 __func__);
314 return -1;
315 }
316 }
317
318 /* This tells SDIO FIFO when to start read to host */
319 rsi_dbg(INIT_ZONE, "%s: Initialzing SDIO read start level\n", __func__);
320 byte = 0x24;
321
322 status = rsi_sdio_write_register(adapter,
323 function,
324 SDIO_READ_START_LVL,
325 &byte);
326 if (status) {
327 rsi_dbg(ERR_ZONE,
328 "%s: Failed to write SDIO_READ_START_LVL\n", __func__);
329 return -1;
330 }
331
332 rsi_dbg(INIT_ZONE, "%s: Initialzing FIFO ctrl registers\n", __func__);
333 byte = (128 - 32);
334
335 status = rsi_sdio_write_register(adapter,
336 function,
337 SDIO_READ_FIFO_CTL,
338 &byte);
339 if (status) {
340 rsi_dbg(ERR_ZONE,
341 "%s: Failed to write SDIO_READ_FIFO_CTL\n", __func__);
342 return -1;
343 }
344
345 byte = 32;
346 status = rsi_sdio_write_register(adapter,
347 function,
348 SDIO_WRITE_FIFO_CTL,
349 &byte);
350 if (status) {
351 rsi_dbg(ERR_ZONE,
352 "%s: Failed to write SDIO_WRITE_FIFO_CTL\n", __func__);
353 return -1;
354 }
355
356 return 0;
357}
358
359/**
360 * rsi_interrupt_handler() - This function read and process SDIO interrupts.
361 * @adapter: Pointer to the adapter structure.
362 *
363 * Return: None.
364 */
365void rsi_interrupt_handler(struct rsi_hw *adapter)
366{
367 struct rsi_common *common = adapter->priv;
368 struct rsi_91x_sdiodev *dev =
369 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
370 int status;
371 enum sdio_interrupt_type isr_type;
372 u8 isr_status = 0;
373 u8 fw_status = 0;
374
375 dev->rx_info.sdio_int_counter++;
376
377 do {
378 mutex_lock(&common->tx_rxlock);
379 status = rsi_sdio_read_register(common->priv,
380 RSI_FN1_INT_REGISTER,
381 &isr_status);
382 if (status) {
383 rsi_dbg(ERR_ZONE,
384 "%s: Failed to Read Intr Status Register\n",
385 __func__);
386 mutex_unlock(&common->tx_rxlock);
387 return;
388 }
389
390 if (isr_status == 0) {
391 rsi_set_event(&common->tx_thread.event);
392 dev->rx_info.sdio_intr_status_zero++;
393 mutex_unlock(&common->tx_rxlock);
394 return;
395 }
396
397 rsi_dbg(ISR_ZONE, "%s: Intr_status = %x %d %d\n",
398 __func__, isr_status, (1 << MSDU_PKT_PENDING),
399 (1 << FW_ASSERT_IND));
400
401 do {
402 RSI_GET_SDIO_INTERRUPT_TYPE(isr_status, isr_type);
403
404 switch (isr_type) {
405 case BUFFER_AVAILABLE:
406 dev->rx_info.watch_bufferfull_count = 0;
407 dev->rx_info.buffer_full = false;
f75d3419 408 dev->rx_info.semi_buffer_full = false;
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409 dev->rx_info.mgmt_buffer_full = false;
410 rsi_sdio_ack_intr(common->priv,
411 (1 << PKT_BUFF_AVAILABLE));
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412 rsi_set_event(&common->tx_thread.event);
413
dad0d04f 414 rsi_dbg(ISR_ZONE,
f75d3419 415 "%s: ==> BUFFER_AVAILABLE <==\n",
dad0d04f 416 __func__);
f75d3419 417 dev->rx_info.buf_available_counter++;
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418 break;
419
420 case FIRMWARE_ASSERT_IND:
421 rsi_dbg(ERR_ZONE,
422 "%s: ==> FIRMWARE Assert <==\n",
423 __func__);
424 status = rsi_sdio_read_register(common->priv,
425 SDIO_FW_STATUS_REG,
426 &fw_status);
427 if (status) {
428 rsi_dbg(ERR_ZONE,
429 "%s: Failed to read f/w reg\n",
430 __func__);
431 } else {
432 rsi_dbg(ERR_ZONE,
433 "%s: Firmware Status is 0x%x\n",
434 __func__ , fw_status);
435 rsi_sdio_ack_intr(common->priv,
436 (1 << FW_ASSERT_IND));
437 }
438
439 common->fsm_state = FSM_CARD_NOT_READY;
440 break;
441
442 case MSDU_PACKET_PENDING:
443 rsi_dbg(ISR_ZONE, "Pkt pending interrupt\n");
444 dev->rx_info.total_sdio_msdu_pending_intr++;
445
446 status = rsi_process_pkt(common);
447 if (status) {
448 rsi_dbg(ERR_ZONE,
449 "%s: Failed to read pkt\n",
450 __func__);
451 mutex_unlock(&common->tx_rxlock);
452 return;
453 }
454 break;
455 default:
456 rsi_sdio_ack_intr(common->priv, isr_status);
457 dev->rx_info.total_sdio_unknown_intr++;
458 isr_status = 0;
459 rsi_dbg(ISR_ZONE,
460 "Unknown Interrupt %x\n",
461 isr_status);
462 break;
463 }
464 isr_status ^= BIT(isr_type - 1);
465 } while (isr_status);
466 mutex_unlock(&common->tx_rxlock);
467 } while (1);
468}
469
470/**
471 * rsi_device_init() - This Function Initializes The HAL.
472 * @common: Pointer to the driver private structure.
473 *
474 * Return: 0 on success, -1 on failure.
475 */
476int rsi_sdio_device_init(struct rsi_common *common)
477{
478 if (rsi_load_ta_instructions(common))
479 return -1;
480
481 if (rsi_sdio_master_access_msword(common->priv, MISC_CFG_BASE_ADDR)) {
482 rsi_dbg(ERR_ZONE, "%s: Unable to set ms word reg\n",
483 __func__);
484 return -1;
485 }
486 rsi_dbg(INIT_ZONE,
487 "%s: Setting ms word to 0x41050000\n", __func__);
488
489 return 0;
490}
491
492/**
493 * rsi_sdio_read_buffer_status_register() - This function is used to the read
494 * buffer status register and set
495 * relevant fields in
496 * rsi_91x_sdiodev struct.
497 * @adapter: Pointer to the driver hw structure.
498 * @q_num: The Q number whose status is to be found.
499 *
500 * Return: status: -1 on failure or else queue full/stop is indicated.
501 */
502int rsi_sdio_read_buffer_status_register(struct rsi_hw *adapter, u8 q_num)
503{
504 struct rsi_common *common = adapter->priv;
505 struct rsi_91x_sdiodev *dev =
506 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
507 u8 buf_status = 0;
508 int status = 0;
509
510 status = rsi_sdio_read_register(common->priv,
511 RSI_DEVICE_BUFFER_STATUS_REGISTER,
512 &buf_status);
513
514 if (status) {
515 rsi_dbg(ERR_ZONE,
516 "%s: Failed to read status register\n", __func__);
517 return -1;
518 }
519
520 if (buf_status & (BIT(PKT_MGMT_BUFF_FULL))) {
521 if (!dev->rx_info.mgmt_buffer_full)
522 dev->rx_info.mgmt_buf_full_counter++;
523 dev->rx_info.mgmt_buffer_full = true;
524 } else {
525 dev->rx_info.mgmt_buffer_full = false;
526 }
527
528 if (buf_status & (BIT(PKT_BUFF_FULL))) {
529 if (!dev->rx_info.buffer_full)
530 dev->rx_info.buf_full_counter++;
531 dev->rx_info.buffer_full = true;
532 } else {
533 dev->rx_info.buffer_full = false;
534 }
535
536 if (buf_status & (BIT(PKT_BUFF_SEMI_FULL))) {
537 if (!dev->rx_info.semi_buffer_full)
538 dev->rx_info.buf_semi_full_counter++;
539 dev->rx_info.semi_buffer_full = true;
540 } else {
541 dev->rx_info.semi_buffer_full = false;
542 }
543
544 if ((q_num == MGMT_SOFT_Q) && (dev->rx_info.mgmt_buffer_full))
545 return QUEUE_FULL;
546
547 if (dev->rx_info.buffer_full)
548 return QUEUE_FULL;
549
550 return QUEUE_NOT_FULL;
551}
552
553/**
554 * rsi_sdio_determine_event_timeout() - This Function determines the event
555 * timeout duration.
556 * @adapter: Pointer to the adapter structure.
557 *
558 * Return: timeout duration is returned.
559 */
560int rsi_sdio_determine_event_timeout(struct rsi_hw *adapter)
561{
562 struct rsi_91x_sdiodev *dev =
563 (struct rsi_91x_sdiodev *)adapter->rsi_dev;
564
565 /* Once buffer full is seen, event timeout to occur every 2 msecs */
566 if (dev->rx_info.buffer_full)
567 return 2;
568
569 return EVENT_WAIT_FOREVER;
570}