1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Driver for KeyStream, KS7010 based SDIO cards.
4 *
5 * Copyright (C) 2006-2008 KeyStream Corp.
6 * Copyright (C) 2009 Renesas Technology Corp.
7 * Copyright (C) 2016 Sang Engineering, Wolfram Sang
8 */
9
10 #include <linux/atomic.h>
11 #include <linux/firmware.h>
12 #include <linux/jiffies.h>
13 #include <linux/mmc/card.h>
14 #include <linux/mmc/sdio_func.h>
15 #include <linux/module.h>
16 #include <linux/workqueue.h>
17 #include "ks_wlan.h"
18 #include "ks_hostif.h"
19
20 #define ROM_FILE "ks7010sd.rom"
21
22 /* SDIO KeyStream vendor and device */
23 #define SDIO_VENDOR_ID_KS_CODE_A 0x005b
24 #define SDIO_VENDOR_ID_KS_CODE_B 0x0023
25
26 /* Older sources suggest earlier versions were named 7910 or 79xx */
27 #define SDIO_DEVICE_ID_KS_7010 0x7910
28
29 /* Read/Write Status Register */
30 #define READ_STATUS_REG 0x000000
31 #define WRITE_STATUS_REG 0x00000C
32 enum reg_status_type {
33 REG_STATUS_BUSY,
34 REG_STATUS_IDLE
35 };
36
37 /* Read Index Register */
38 #define READ_INDEX_REG 0x000004
39
40 /* Read Data Size Register */
41 #define READ_DATA_SIZE_REG 0x000008
42
43 /* Write Index Register */
44 #define WRITE_INDEX_REG 0x000010
45
46 /*
47 * Write Status/Read Data Size Register
48 * for network packet (less than 2048 bytes data)
49 */
50 #define WSTATUS_RSIZE_REG 0x000014
51
52 /* Write Status Register value */
53 #define WSTATUS_MASK 0x80
54
55 /* Read Data Size Register value [10:4] */
56 #define RSIZE_MASK 0x7F
57
58 /* ARM to SD interrupt Enable */
59 #define INT_ENABLE_REG 0x000020
60 /* ARM to SD interrupt Pending */
61 #define INT_PENDING_REG 0x000024
62
63 #define INT_GCR_B BIT(7)
64 #define INT_GCR_A BIT(6)
65 #define INT_WRITE_STATUS BIT(5)
66 #define INT_WRITE_INDEX BIT(4)
67 #define INT_WRITE_SIZE BIT(3)
68 #define INT_READ_STATUS BIT(2)
69 #define INT_READ_INDEX BIT(1)
70 #define INT_READ_SIZE BIT(0)
71
72 /* General Communication Register A */
73 #define GCR_A_REG 0x000028
74 enum gen_com_reg_a {
75 GCR_A_INIT,
76 GCR_A_REMAP,
77 GCR_A_RUN
78 };
79
80 /* General Communication Register B */
81 #define GCR_B_REG 0x00002C
82 enum gen_com_reg_b {
83 GCR_B_ACTIVE,
84 GCR_B_DOZE
85 };
86
87 /* Wakeup Register */
88 #define WAKEUP_REG 0x008018
89 #define WAKEUP_REQ 0x5a
90
91 /* AHB Data Window 0x010000-0x01FFFF */
92 #define DATA_WINDOW 0x010000
93 #define WINDOW_SIZE (64 * 1024)
94
95 #define KS7010_IRAM_ADDRESS 0x06000000
96
97 #define KS7010_IO_BLOCK_SIZE 512
98
99 /**
100 * struct ks_sdio_card - SDIO device data.
101 *
102 * Structure is used as the &struct sdio_func private data.
103 *
104 * @func: Pointer to the SDIO function device.
105 * @priv: Pointer to the &struct net_device private data.
106 */
107 struct ks_sdio_card {
108 struct sdio_func *func;
109 struct ks_wlan_private *priv;
110 };
111
ks7010_to_func(struct ks_wlan_private * priv)112 static struct sdio_func *ks7010_to_func(struct ks_wlan_private *priv)
113 {
114 struct ks_sdio_card *ks_sdio = priv->if_hw;
115
116 return ks_sdio->func;
117 }
118
119 /* Read single byte from device address into byte (CMD52) */
ks7010_sdio_readb(struct ks_wlan_private * priv,u32 address,u8 * byte)120 static int ks7010_sdio_readb(struct ks_wlan_private *priv,
121 u32 address, u8 *byte)
122 {
123 struct sdio_func *func = ks7010_to_func(priv);
124 int ret;
125
126 *byte = sdio_readb(func, address, &ret);
127
128 return ret;
129 }
130
131 /* Read length bytes from device address into buffer (CMD53) */
ks7010_sdio_read(struct ks_wlan_private * priv,u32 address,u8 * buffer,unsigned int length)132 static int ks7010_sdio_read(struct ks_wlan_private *priv, u32 address,
133 u8 *buffer, unsigned int length)
134 {
135 struct sdio_func *func = ks7010_to_func(priv);
136
137 return sdio_memcpy_fromio(func, buffer, address, length);
138 }
139
140 /* Write single byte to device address (CMD52) */
ks7010_sdio_writeb(struct ks_wlan_private * priv,u32 address,u8 byte)141 static int ks7010_sdio_writeb(struct ks_wlan_private *priv,
142 u32 address, u8 byte)
143 {
144 struct sdio_func *func = ks7010_to_func(priv);
145 int ret;
146
147 sdio_writeb(func, byte, address, &ret);
148
149 return ret;
150 }
151
152 /* Write length bytes to device address from buffer (CMD53) */
ks7010_sdio_write(struct ks_wlan_private * priv,u32 address,u8 * buffer,unsigned int length)153 static int ks7010_sdio_write(struct ks_wlan_private *priv, u32 address,
154 u8 *buffer, unsigned int length)
155 {
156 struct sdio_func *func = ks7010_to_func(priv);
157
158 return sdio_memcpy_toio(func, address, buffer, length);
159 }
160
ks_wlan_hw_sleep_doze_request(struct ks_wlan_private * priv)161 static void ks_wlan_hw_sleep_doze_request(struct ks_wlan_private *priv)
162 {
163 int ret;
164
165 /* clear request */
166 atomic_set(&priv->sleepstatus.doze_request, 0);
167
168 if (atomic_read(&priv->sleepstatus.status) == 0) {
169 ret = ks7010_sdio_writeb(priv, GCR_B_REG, GCR_B_DOZE);
170 if (ret) {
171 netdev_err(priv->net_dev, "write GCR_B_REG\n");
172 goto set_sleep_mode;
173 }
174 atomic_set(&priv->sleepstatus.status, 1);
175 priv->last_doze = jiffies;
176 }
177
178 set_sleep_mode:
179 priv->sleep_mode = atomic_read(&priv->sleepstatus.status);
180 }
181
ks_wlan_hw_sleep_wakeup_request(struct ks_wlan_private * priv)182 static void ks_wlan_hw_sleep_wakeup_request(struct ks_wlan_private *priv)
183 {
184 int ret;
185
186 /* clear request */
187 atomic_set(&priv->sleepstatus.wakeup_request, 0);
188
189 if (atomic_read(&priv->sleepstatus.status) == 1) {
190 ret = ks7010_sdio_writeb(priv, WAKEUP_REG, WAKEUP_REQ);
191 if (ret) {
192 netdev_err(priv->net_dev, "write WAKEUP_REG\n");
193 goto set_sleep_mode;
194 }
195 atomic_set(&priv->sleepstatus.status, 0);
196 priv->last_wakeup = jiffies;
197 ++priv->wakeup_count;
198 }
199
200 set_sleep_mode:
201 priv->sleep_mode = atomic_read(&priv->sleepstatus.status);
202 }
203
ks_wlan_hw_wakeup_request(struct ks_wlan_private * priv)204 void ks_wlan_hw_wakeup_request(struct ks_wlan_private *priv)
205 {
206 int ret;
207
208 if (atomic_read(&priv->psstatus.status) == PS_SNOOZE) {
209 ret = ks7010_sdio_writeb(priv, WAKEUP_REG, WAKEUP_REQ);
210 if (ret)
211 netdev_err(priv->net_dev, "write WAKEUP_REG\n");
212
213 priv->last_wakeup = jiffies;
214 ++priv->wakeup_count;
215 }
216 }
217
_ks_wlan_hw_power_save(struct ks_wlan_private * priv)218 static void _ks_wlan_hw_power_save(struct ks_wlan_private *priv)
219 {
220 u8 byte;
221 int ret;
222
223 if (priv->reg.power_mgmt == POWER_MGMT_ACTIVE)
224 return;
225
226 if (priv->reg.operation_mode != MODE_INFRASTRUCTURE)
227 return;
228
229 if (!is_connect_status(priv->connect_status))
230 return;
231
232 if (priv->dev_state != DEVICE_STATE_SLEEP)
233 return;
234
235 if (atomic_read(&priv->psstatus.status) == PS_SNOOZE)
236 return;
237
238 netdev_dbg(priv->net_dev,
239 "STATUS:\n"
240 "- psstatus.status = %d\n"
241 "- psstatus.confirm_wait = %d\n"
242 "- psstatus.snooze_guard = %d\n"
243 "- txq_count = %d\n",
244 atomic_read(&priv->psstatus.status),
245 atomic_read(&priv->psstatus.confirm_wait),
246 atomic_read(&priv->psstatus.snooze_guard),
247 txq_count(priv));
248
249 if (atomic_read(&priv->psstatus.confirm_wait) ||
250 atomic_read(&priv->psstatus.snooze_guard) ||
251 txq_has_space(priv)) {
252 queue_delayed_work(priv->wq, &priv->rw_dwork, 0);
253 return;
254 }
255
256 ret = ks7010_sdio_readb(priv, INT_PENDING_REG, &byte);
257 if (ret) {
258 netdev_err(priv->net_dev, "read INT_PENDING_REG\n");
259 goto queue_delayed_work;
260 }
261 if (byte)
262 goto queue_delayed_work;
263
264 ret = ks7010_sdio_writeb(priv, GCR_B_REG, GCR_B_DOZE);
265 if (ret) {
266 netdev_err(priv->net_dev, "write GCR_B_REG\n");
267 goto queue_delayed_work;
268 }
269 atomic_set(&priv->psstatus.status, PS_SNOOZE);
270
271 return;
272
273 queue_delayed_work:
274 queue_delayed_work(priv->wq, &priv->rw_dwork, 1);
275 }
276
ks_wlan_hw_power_save(struct ks_wlan_private * priv)277 int ks_wlan_hw_power_save(struct ks_wlan_private *priv)
278 {
279 queue_delayed_work(priv->wq, &priv->rw_dwork, 1);
280 return 0;
281 }
282
enqueue_txdev(struct ks_wlan_private * priv,unsigned char * p,unsigned long size,void (* complete_handler)(struct ks_wlan_private * priv,struct sk_buff * skb),struct sk_buff * skb)283 static int enqueue_txdev(struct ks_wlan_private *priv, unsigned char *p,
284 unsigned long size,
285 void (*complete_handler)(struct ks_wlan_private *priv,
286 struct sk_buff *skb),
287 struct sk_buff *skb)
288 {
289 struct tx_device_buffer *sp;
290 int ret;
291
292 if (priv->dev_state < DEVICE_STATE_BOOT) {
293 ret = -EPERM;
294 goto err_complete;
295 }
296
297 if ((TX_DEVICE_BUFF_SIZE - 1) <= txq_count(priv)) {
298 netdev_err(priv->net_dev, "tx buffer overflow\n");
299 ret = -EOVERFLOW;
300 goto err_complete;
301 }
302
303 sp = &priv->tx_dev.tx_dev_buff[priv->tx_dev.qtail];
304 sp->sendp = p;
305 sp->size = size;
306 sp->complete_handler = complete_handler;
307 sp->skb = skb;
308 inc_txqtail(priv);
309
310 return 0;
311
312 err_complete:
313 kfree(p);
314 if (complete_handler)
315 (*complete_handler)(priv, skb);
316
317 return ret;
318 }
319
320 /* write data */
write_to_device(struct ks_wlan_private * priv,u8 * buffer,unsigned long size)321 static int write_to_device(struct ks_wlan_private *priv, u8 *buffer,
322 unsigned long size)
323 {
324 struct hostif_hdr *hdr;
325 int ret;
326
327 hdr = (struct hostif_hdr *)buffer;
328
329 if (le16_to_cpu(hdr->event) < HIF_DATA_REQ ||
330 le16_to_cpu(hdr->event) > HIF_REQ_MAX) {
331 netdev_err(priv->net_dev, "unknown event=%04X\n", hdr->event);
332 return 0;
333 }
334
335 ret = ks7010_sdio_write(priv, DATA_WINDOW, buffer, size);
336 if (ret) {
337 netdev_err(priv->net_dev, "write DATA_WINDOW\n");
338 return ret;
339 }
340
341 ret = ks7010_sdio_writeb(priv, WRITE_STATUS_REG, REG_STATUS_BUSY);
342 if (ret) {
343 netdev_err(priv->net_dev, "write WRITE_STATUS_REG\n");
344 return ret;
345 }
346
347 return 0;
348 }
349
tx_device_task(struct ks_wlan_private * priv)350 static void tx_device_task(struct ks_wlan_private *priv)
351 {
352 struct tx_device_buffer *sp;
353 int ret;
354
355 if (!txq_has_space(priv) ||
356 atomic_read(&priv->psstatus.status) == PS_SNOOZE)
357 return;
358
359 sp = &priv->tx_dev.tx_dev_buff[priv->tx_dev.qhead];
360 if (priv->dev_state >= DEVICE_STATE_BOOT) {
361 ret = write_to_device(priv, sp->sendp, sp->size);
362 if (ret) {
363 netdev_err(priv->net_dev,
364 "write_to_device error !!(%d)\n", ret);
365 queue_delayed_work(priv->wq, &priv->rw_dwork, 1);
366 return;
367 }
368 }
369 kfree(sp->sendp);
370 if (sp->complete_handler) /* TX Complete */
371 (*sp->complete_handler)(priv, sp->skb);
372 inc_txqhead(priv);
373
374 if (txq_has_space(priv))
375 queue_delayed_work(priv->wq, &priv->rw_dwork, 0);
376 }
377
ks_wlan_hw_tx(struct ks_wlan_private * priv,void * p,unsigned long size,void (* complete_handler)(struct ks_wlan_private * priv,struct sk_buff * skb),struct sk_buff * skb)378 int ks_wlan_hw_tx(struct ks_wlan_private *priv, void *p, unsigned long size,
379 void (*complete_handler)(struct ks_wlan_private *priv,
380 struct sk_buff *skb),
381 struct sk_buff *skb)
382 {
383 int result;
384 struct hostif_hdr *hdr;
385
386 hdr = (struct hostif_hdr *)p;
387
388 if (le16_to_cpu(hdr->event) < HIF_DATA_REQ ||
389 le16_to_cpu(hdr->event) > HIF_REQ_MAX) {
390 netdev_err(priv->net_dev, "unknown event=%04X\n", hdr->event);
391 return 0;
392 }
393
394 /* add event to hostt buffer */
395 priv->hostt.buff[priv->hostt.qtail] = le16_to_cpu(hdr->event);
396 priv->hostt.qtail = (priv->hostt.qtail + 1) % SME_EVENT_BUFF_SIZE;
397
398 spin_lock_bh(&priv->tx_dev.tx_dev_lock);
399 result = enqueue_txdev(priv, p, size, complete_handler, skb);
400 spin_unlock_bh(&priv->tx_dev.tx_dev_lock);
401
402 if (txq_has_space(priv))
403 queue_delayed_work(priv->wq, &priv->rw_dwork, 0);
404
405 return result;
406 }
407
rx_event_task(struct tasklet_struct * t)408 static void rx_event_task(struct tasklet_struct *t)
409 {
410 struct ks_wlan_private *priv = from_tasklet(priv, t, rx_bh_task);
411 struct rx_device_buffer *rp;
412
413 if (rxq_has_space(priv) && priv->dev_state >= DEVICE_STATE_BOOT) {
414 rp = &priv->rx_dev.rx_dev_buff[priv->rx_dev.qhead];
415 hostif_receive(priv, rp->data, rp->size);
416 inc_rxqhead(priv);
417
418 if (rxq_has_space(priv))
419 tasklet_schedule(&priv->rx_bh_task);
420 }
421 }
422
ks_wlan_hw_rx(struct ks_wlan_private * priv,size_t size)423 static void ks_wlan_hw_rx(struct ks_wlan_private *priv, size_t size)
424 {
425 int ret;
426 struct rx_device_buffer *rx_buffer;
427 struct hostif_hdr *hdr;
428 u16 event = 0;
429
430 /* receive data */
431 if (rxq_count(priv) >= (RX_DEVICE_BUFF_SIZE - 1)) {
432 netdev_err(priv->net_dev, "rx buffer overflow\n");
433 return;
434 }
435 rx_buffer = &priv->rx_dev.rx_dev_buff[priv->rx_dev.qtail];
436
437 ret = ks7010_sdio_read(priv, DATA_WINDOW, &rx_buffer->data[0],
438 hif_align_size(size));
439 if (ret)
440 return;
441
442 /* length check */
443 if (size > 2046 || size == 0) {
444 #ifdef DEBUG
445 print_hex_dump_bytes("INVALID DATA dump: ",
446 DUMP_PREFIX_OFFSET,
447 rx_buffer->data, 32);
448 #endif
449 ret = ks7010_sdio_writeb(priv, READ_STATUS_REG,
450 REG_STATUS_IDLE);
451 if (ret)
452 netdev_err(priv->net_dev, "write READ_STATUS_REG\n");
453
454 /* length check fail */
455 return;
456 }
457
458 hdr = (struct hostif_hdr *)&rx_buffer->data[0];
459 rx_buffer->size = le16_to_cpu(hdr->size) + sizeof(hdr->size);
460 event = le16_to_cpu(hdr->event);
461 inc_rxqtail(priv);
462
463 ret = ks7010_sdio_writeb(priv, READ_STATUS_REG, REG_STATUS_IDLE);
464 if (ret)
465 netdev_err(priv->net_dev, "write READ_STATUS_REG\n");
466
467 if (atomic_read(&priv->psstatus.confirm_wait) && is_hif_conf(event)) {
468 netdev_dbg(priv->net_dev, "IS_HIF_CONF true !!\n");
469 atomic_dec(&priv->psstatus.confirm_wait);
470 }
471
472 tasklet_schedule(&priv->rx_bh_task);
473 }
474
ks7010_rw_function(struct work_struct * work)475 static void ks7010_rw_function(struct work_struct *work)
476 {
477 struct ks_wlan_private *priv = container_of(work,
478 struct ks_wlan_private,
479 rw_dwork.work);
480 struct sdio_func *func = ks7010_to_func(priv);
481 u8 byte;
482 int ret;
483
484 /* wait after DOZE */
485 if (time_after(priv->last_doze + msecs_to_jiffies(30), jiffies)) {
486 netdev_dbg(priv->net_dev, "wait after DOZE\n");
487 queue_delayed_work(priv->wq, &priv->rw_dwork, 1);
488 return;
489 }
490
491 /* wait after WAKEUP */
492 while (time_after(priv->last_wakeup + msecs_to_jiffies(30), jiffies)) {
493 netdev_dbg(priv->net_dev, "wait after WAKEUP\n");
494 dev_info(&func->dev, "wake: %lu %lu\n",
495 priv->last_wakeup + msecs_to_jiffies(30), jiffies);
496 msleep(30);
497 }
498
499 sdio_claim_host(func);
500
501 /* power save wakeup */
502 if (atomic_read(&priv->psstatus.status) == PS_SNOOZE) {
503 if (txq_has_space(priv)) {
504 ks_wlan_hw_wakeup_request(priv);
505 queue_delayed_work(priv->wq, &priv->rw_dwork, 1);
506 }
507 goto release_host;
508 }
509
510 /* sleep mode doze */
511 if (atomic_read(&priv->sleepstatus.doze_request) == 1) {
512 ks_wlan_hw_sleep_doze_request(priv);
513 goto release_host;
514 }
515 /* sleep mode wakeup */
516 if (atomic_read(&priv->sleepstatus.wakeup_request) == 1) {
517 ks_wlan_hw_sleep_wakeup_request(priv);
518 goto release_host;
519 }
520
521 /* read (WriteStatus/ReadDataSize FN1:00_0014) */
522 ret = ks7010_sdio_readb(priv, WSTATUS_RSIZE_REG, &byte);
523 if (ret) {
524 netdev_err(priv->net_dev, "read WSTATUS_RSIZE_REG psstatus=%d\n",
525 atomic_read(&priv->psstatus.status));
526 goto release_host;
527 }
528
529 if (byte & RSIZE_MASK) { /* Read schedule */
530 ks_wlan_hw_rx(priv, (size_t)((byte & RSIZE_MASK) << 4));
531 }
532 if ((byte & WSTATUS_MASK))
533 tx_device_task(priv);
534
535 _ks_wlan_hw_power_save(priv);
536
537 release_host:
538 sdio_release_host(func);
539 }
540
ks_sdio_interrupt(struct sdio_func * func)541 static void ks_sdio_interrupt(struct sdio_func *func)
542 {
543 int ret;
544 struct ks_sdio_card *card;
545 struct ks_wlan_private *priv;
546 u8 status, rsize, byte;
547
548 card = sdio_get_drvdata(func);
549 priv = card->priv;
550
551 if (priv->dev_state < DEVICE_STATE_BOOT)
552 goto queue_delayed_work;
553
554 ret = ks7010_sdio_readb(priv, INT_PENDING_REG, &status);
555 if (ret) {
556 netdev_err(priv->net_dev, "read INT_PENDING_REG\n");
557 goto queue_delayed_work;
558 }
559
560 /* schedule task for interrupt status */
561 /* bit7 -> Write General Communication B register */
562 /* read (General Communication B register) */
563 /* bit5 -> Write Status Idle */
564 /* bit2 -> Read Status Busy */
565 if (status & INT_GCR_B ||
566 atomic_read(&priv->psstatus.status) == PS_SNOOZE) {
567 ret = ks7010_sdio_readb(priv, GCR_B_REG, &byte);
568 if (ret) {
569 netdev_err(priv->net_dev, "read GCR_B_REG\n");
570 goto queue_delayed_work;
571 }
572 if (byte == GCR_B_ACTIVE) {
573 if (atomic_read(&priv->psstatus.status) == PS_SNOOZE) {
574 atomic_set(&priv->psstatus.status, PS_WAKEUP);
575 priv->wakeup_count = 0;
576 }
577 complete(&priv->psstatus.wakeup_wait);
578 }
579 }
580
581 do {
582 /* read (WriteStatus/ReadDataSize FN1:00_0014) */
583 ret = ks7010_sdio_readb(priv, WSTATUS_RSIZE_REG, &byte);
584 if (ret) {
585 netdev_err(priv->net_dev, "read WSTATUS_RSIZE_REG\n");
586 goto queue_delayed_work;
587 }
588 rsize = byte & RSIZE_MASK;
589 if (rsize != 0) /* Read schedule */
590 ks_wlan_hw_rx(priv, (size_t)(rsize << 4));
591
592 if (byte & WSTATUS_MASK) {
593 if (atomic_read(&priv->psstatus.status) == PS_SNOOZE) {
594 if (txq_has_space(priv)) {
595 ks_wlan_hw_wakeup_request(priv);
596 queue_delayed_work(priv->wq,
597 &priv->rw_dwork, 1);
598 return;
599 }
600 } else {
601 tx_device_task(priv);
602 }
603 }
604 } while (rsize);
605
606 queue_delayed_work:
607 queue_delayed_work(priv->wq, &priv->rw_dwork, 0);
608 }
609
trx_device_init(struct ks_wlan_private * priv)610 static int trx_device_init(struct ks_wlan_private *priv)
611 {
612 priv->tx_dev.qhead = 0;
613 priv->tx_dev.qtail = 0;
614
615 priv->rx_dev.qhead = 0;
616 priv->rx_dev.qtail = 0;
617
618 spin_lock_init(&priv->tx_dev.tx_dev_lock);
619 spin_lock_init(&priv->rx_dev.rx_dev_lock);
620
621 tasklet_setup(&priv->rx_bh_task, rx_event_task);
622
623 return 0;
624 }
625
trx_device_exit(struct ks_wlan_private * priv)626 static void trx_device_exit(struct ks_wlan_private *priv)
627 {
628 struct tx_device_buffer *sp;
629
630 /* tx buffer clear */
631 while (txq_has_space(priv)) {
632 sp = &priv->tx_dev.tx_dev_buff[priv->tx_dev.qhead];
633 kfree(sp->sendp);
634 if (sp->complete_handler) /* TX Complete */
635 (*sp->complete_handler)(priv, sp->skb);
636 inc_txqhead(priv);
637 }
638
639 tasklet_kill(&priv->rx_bh_task);
640 }
641
ks7010_sdio_update_index(struct ks_wlan_private * priv,u32 index)642 static int ks7010_sdio_update_index(struct ks_wlan_private *priv, u32 index)
643 {
644 int ret;
645 unsigned char *data_buf;
646
647 data_buf = kmemdup(&index, sizeof(u32), GFP_KERNEL);
648 if (!data_buf)
649 return -ENOMEM;
650
651 ret = ks7010_sdio_write(priv, WRITE_INDEX_REG, data_buf, sizeof(index));
652 if (ret)
653 goto err_free_data_buf;
654
655 ret = ks7010_sdio_write(priv, READ_INDEX_REG, data_buf, sizeof(index));
656 if (ret)
657 goto err_free_data_buf;
658
659 return 0;
660
661 err_free_data_buf:
662 kfree(data_buf);
663
664 return ret;
665 }
666
667 #define ROM_BUFF_SIZE (64 * 1024)
ks7010_sdio_data_compare(struct ks_wlan_private * priv,u32 address,u8 * data,unsigned int size)668 static int ks7010_sdio_data_compare(struct ks_wlan_private *priv, u32 address,
669 u8 *data, unsigned int size)
670 {
671 int ret;
672 u8 *read_buf;
673
674 read_buf = kmalloc(ROM_BUFF_SIZE, GFP_KERNEL);
675 if (!read_buf)
676 return -ENOMEM;
677
678 ret = ks7010_sdio_read(priv, address, read_buf, size);
679 if (ret)
680 goto err_free_read_buf;
681
682 if (memcmp(data, read_buf, size) != 0) {
683 ret = -EIO;
684 netdev_err(priv->net_dev, "data compare error (%d)\n", ret);
685 goto err_free_read_buf;
686 }
687
688 return 0;
689
690 err_free_read_buf:
691 kfree(read_buf);
692
693 return ret;
694 }
695
ks7010_copy_firmware(struct ks_wlan_private * priv,const struct firmware * fw_entry)696 static int ks7010_copy_firmware(struct ks_wlan_private *priv,
697 const struct firmware *fw_entry)
698 {
699 unsigned int length;
700 unsigned int size;
701 unsigned int offset;
702 unsigned int n = 0;
703 u8 *rom_buf;
704 int ret;
705
706 rom_buf = kmalloc(ROM_BUFF_SIZE, GFP_KERNEL);
707 if (!rom_buf)
708 return -ENOMEM;
709
710 length = fw_entry->size;
711
712 do {
713 if (length >= ROM_BUFF_SIZE) {
714 size = ROM_BUFF_SIZE;
715 length = length - ROM_BUFF_SIZE;
716 } else {
717 size = length;
718 length = 0;
719 }
720 if (size == 0)
721 break;
722
723 memcpy(rom_buf, fw_entry->data + n, size);
724
725 offset = n;
726 ret = ks7010_sdio_update_index(priv,
727 KS7010_IRAM_ADDRESS + offset);
728 if (ret)
729 goto free_rom_buf;
730
731 ret = ks7010_sdio_write(priv, DATA_WINDOW, rom_buf, size);
732 if (ret)
733 goto free_rom_buf;
734
735 ret = ks7010_sdio_data_compare(priv,
736 DATA_WINDOW, rom_buf, size);
737 if (ret)
738 goto free_rom_buf;
739
740 n += size;
741
742 } while (size);
743
744 ret = ks7010_sdio_writeb(priv, GCR_A_REG, GCR_A_REMAP);
745
746 free_rom_buf:
747 kfree(rom_buf);
748 return ret;
749 }
750
ks7010_upload_firmware(struct ks_sdio_card * card)751 static int ks7010_upload_firmware(struct ks_sdio_card *card)
752 {
753 struct ks_wlan_private *priv = card->priv;
754 struct sdio_func *func = ks7010_to_func(priv);
755 unsigned int n;
756 u8 byte = 0;
757 int ret;
758 const struct firmware *fw_entry = NULL;
759
760 sdio_claim_host(func);
761
762 /* Firmware running ? */
763 ret = ks7010_sdio_readb(priv, GCR_A_REG, &byte);
764 if (ret)
765 goto release_host;
766 if (byte == GCR_A_RUN) {
767 netdev_dbg(priv->net_dev, "MAC firmware running ...\n");
768 ret = -EBUSY;
769 goto release_host;
770 }
771
772 ret = request_firmware(&fw_entry, ROM_FILE,
773 &func->dev);
774 if (ret)
775 goto release_host;
776
777 ret = ks7010_copy_firmware(priv, fw_entry);
778 if (ret)
779 goto release_firmware;
780
781 /* Firmware running check */
782 for (n = 0; n < 50; ++n) {
783 usleep_range(10000, 11000); /* wait_ms(10); */
784 ret = ks7010_sdio_readb(priv, GCR_A_REG, &byte);
785 if (ret)
786 goto release_firmware;
787
788 if (byte == GCR_A_RUN)
789 break;
790 }
791 if ((50) <= n) {
792 netdev_err(priv->net_dev, "firmware can't start\n");
793 ret = -EIO;
794 goto release_firmware;
795 }
796
797 ret = 0;
798
799 release_firmware:
800 release_firmware(fw_entry);
801 release_host:
802 sdio_release_host(func);
803
804 return ret;
805 }
806
ks7010_sme_enqueue_events(struct ks_wlan_private * priv)807 static void ks7010_sme_enqueue_events(struct ks_wlan_private *priv)
808 {
809 static const u16 init_events[] = {
810 SME_GET_EEPROM_CKSUM, SME_STOP_REQUEST,
811 SME_RTS_THRESHOLD_REQUEST, SME_FRAGMENTATION_THRESHOLD_REQUEST,
812 SME_WEP_INDEX_REQUEST, SME_WEP_KEY1_REQUEST,
813 SME_WEP_KEY2_REQUEST, SME_WEP_KEY3_REQUEST,
814 SME_WEP_KEY4_REQUEST, SME_WEP_FLAG_REQUEST,
815 SME_RSN_ENABLED_REQUEST, SME_MODE_SET_REQUEST,
816 SME_START_REQUEST
817 };
818 int ev;
819
820 for (ev = 0; ev < ARRAY_SIZE(init_events); ev++)
821 hostif_sme_enqueue(priv, init_events[ev]);
822 }
823
ks7010_card_init(struct ks_wlan_private * priv)824 static void ks7010_card_init(struct ks_wlan_private *priv)
825 {
826 init_completion(&priv->confirm_wait);
827
828 /* get mac address & firmware version */
829 hostif_sme_enqueue(priv, SME_START);
830
831 if (!wait_for_completion_interruptible_timeout
832 (&priv->confirm_wait, 5 * HZ)) {
833 netdev_dbg(priv->net_dev, "wait time out!! SME_START\n");
834 }
835
836 if (priv->mac_address_valid && priv->version_size != 0)
837 priv->dev_state = DEVICE_STATE_PREINIT;
838
839 ks7010_sme_enqueue_events(priv);
840
841 if (!wait_for_completion_interruptible_timeout
842 (&priv->confirm_wait, 5 * HZ)) {
843 netdev_dbg(priv->net_dev, "wait time out!! wireless parameter set\n");
844 }
845
846 if (priv->dev_state >= DEVICE_STATE_PREINIT) {
847 netdev_dbg(priv->net_dev, "DEVICE READY!!\n");
848 priv->dev_state = DEVICE_STATE_READY;
849 }
850 }
851
ks7010_init_defaults(struct ks_wlan_private * priv)852 static void ks7010_init_defaults(struct ks_wlan_private *priv)
853 {
854 priv->reg.tx_rate = TX_RATE_AUTO;
855 priv->reg.preamble = LONG_PREAMBLE;
856 priv->reg.power_mgmt = POWER_MGMT_ACTIVE;
857 priv->reg.scan_type = ACTIVE_SCAN;
858 priv->reg.beacon_lost_count = 20;
859 priv->reg.rts = 2347UL;
860 priv->reg.fragment = 2346UL;
861 priv->reg.phy_type = D_11BG_COMPATIBLE_MODE;
862 priv->reg.cts_mode = CTS_MODE_FALSE;
863 priv->reg.rate_set.body[11] = TX_RATE_54M;
864 priv->reg.rate_set.body[10] = TX_RATE_48M;
865 priv->reg.rate_set.body[9] = TX_RATE_36M;
866 priv->reg.rate_set.body[8] = TX_RATE_18M;
867 priv->reg.rate_set.body[7] = TX_RATE_9M;
868 priv->reg.rate_set.body[6] = TX_RATE_24M | BASIC_RATE;
869 priv->reg.rate_set.body[5] = TX_RATE_12M | BASIC_RATE;
870 priv->reg.rate_set.body[4] = TX_RATE_6M | BASIC_RATE;
871 priv->reg.rate_set.body[3] = TX_RATE_11M | BASIC_RATE;
872 priv->reg.rate_set.body[2] = TX_RATE_5M | BASIC_RATE;
873 priv->reg.rate_set.body[1] = TX_RATE_2M | BASIC_RATE;
874 priv->reg.rate_set.body[0] = TX_RATE_1M | BASIC_RATE;
875 priv->reg.tx_rate = TX_RATE_FULL_AUTO;
876 priv->reg.rate_set.size = 12;
877 }
878
ks7010_sdio_setup_irqs(struct sdio_func * func)879 static int ks7010_sdio_setup_irqs(struct sdio_func *func)
880 {
881 int ret;
882
883 /* interrupt disable */
884 sdio_writeb(func, 0, INT_ENABLE_REG, &ret);
885 if (ret)
886 goto irq_error;
887
888 sdio_writeb(func, 0xff, INT_PENDING_REG, &ret);
889 if (ret)
890 goto irq_error;
891
892 /* setup interrupt handler */
893 ret = sdio_claim_irq(func, ks_sdio_interrupt);
894
895 irq_error:
896 return ret;
897 }
898
ks7010_sdio_init_irqs(struct sdio_func * func,struct ks_wlan_private * priv)899 static void ks7010_sdio_init_irqs(struct sdio_func *func,
900 struct ks_wlan_private *priv)
901 {
902 u8 byte;
903 int ret;
904
905 /*
906 * interrupt setting
907 * clear Interrupt status write
908 * (ARMtoSD_InterruptPending FN1:00_0024)
909 */
910 sdio_claim_host(func);
911 ret = ks7010_sdio_writeb(priv, INT_PENDING_REG, 0xff);
912 sdio_release_host(func);
913 if (ret)
914 netdev_err(priv->net_dev, "write INT_PENDING_REG\n");
915
916 /* enable ks7010sdio interrupt */
917 byte = (INT_GCR_B | INT_READ_STATUS | INT_WRITE_STATUS);
918 sdio_claim_host(func);
919 ret = ks7010_sdio_writeb(priv, INT_ENABLE_REG, byte);
920 sdio_release_host(func);
921 if (ret)
922 netdev_err(priv->net_dev, "write INT_ENABLE_REG\n");
923 }
924
ks7010_private_init(struct ks_wlan_private * priv,struct ks_sdio_card * card,struct net_device * netdev)925 static void ks7010_private_init(struct ks_wlan_private *priv,
926 struct ks_sdio_card *card,
927 struct net_device *netdev)
928 {
929 /* private memory initialize */
930 priv->if_hw = card;
931
932 priv->dev_state = DEVICE_STATE_PREBOOT;
933 priv->net_dev = netdev;
934 priv->firmware_version[0] = '\0';
935 priv->version_size = 0;
936 priv->last_doze = jiffies;
937 priv->last_wakeup = jiffies;
938 memset(&priv->nstats, 0, sizeof(priv->nstats));
939 memset(&priv->wstats, 0, sizeof(priv->wstats));
940
941 /* sleep mode */
942 atomic_set(&priv->sleepstatus.status, 0);
943 atomic_set(&priv->sleepstatus.doze_request, 0);
944 atomic_set(&priv->sleepstatus.wakeup_request, 0);
945
946 trx_device_init(priv);
947 hostif_init(priv);
948 ks_wlan_net_start(netdev);
949 ks7010_init_defaults(priv);
950 }
951
ks7010_sdio_probe(struct sdio_func * func,const struct sdio_device_id * device)952 static int ks7010_sdio_probe(struct sdio_func *func,
953 const struct sdio_device_id *device)
954 {
955 struct ks_wlan_private *priv = NULL;
956 struct net_device *netdev = NULL;
957 struct ks_sdio_card *card;
958 int ret;
959
960 card = kzalloc(sizeof(*card), GFP_KERNEL);
961 if (!card)
962 return -ENOMEM;
963
964 card->func = func;
965
966 sdio_claim_host(func);
967
968 ret = sdio_set_block_size(func, KS7010_IO_BLOCK_SIZE);
969 if (ret)
970 goto err_free_card;
971
972 dev_dbg(&card->func->dev, "multi_block=%d sdio_set_block_size()=%d %d\n",
973 func->card->cccr.multi_block, func->cur_blksize, ret);
974
975 ret = sdio_enable_func(func);
976 if (ret)
977 goto err_free_card;
978
979 ret = ks7010_sdio_setup_irqs(func);
980 if (ret)
981 goto err_disable_func;
982
983 sdio_release_host(func);
984
985 sdio_set_drvdata(func, card);
986
987 dev_dbg(&card->func->dev, "class = 0x%X, vendor = 0x%X, device = 0x%X\n",
988 func->class, func->vendor, func->device);
989
990 /* private memory allocate */
991 netdev = alloc_etherdev(sizeof(*priv));
992 if (!netdev) {
993 dev_err(&card->func->dev, "Unable to alloc new net device\n");
994 goto err_release_irq;
995 }
996
997 ret = dev_alloc_name(netdev, "wlan%d");
998 if (ret < 0) {
999 dev_err(&card->func->dev, "Couldn't get name!\n");
1000 goto err_free_netdev;
1001 }
1002
1003 priv = netdev_priv(netdev);
1004
1005 card->priv = priv;
1006 SET_NETDEV_DEV(netdev, &card->func->dev);
1007
1008 ks7010_private_init(priv, card, netdev);
1009
1010 ret = ks7010_upload_firmware(card);
1011 if (ret) {
1012 netdev_err(priv->net_dev,
1013 "firmware load failed !! ret = %d\n", ret);
1014 goto err_free_netdev;
1015 }
1016
1017 ks7010_sdio_init_irqs(func, priv);
1018
1019 priv->dev_state = DEVICE_STATE_BOOT;
1020
1021 priv->wq = alloc_workqueue("wq", WQ_MEM_RECLAIM, 1);
1022 if (!priv->wq) {
1023 netdev_err(priv->net_dev, "create_workqueue failed !!\n");
1024 goto err_free_netdev;
1025 }
1026
1027 INIT_DELAYED_WORK(&priv->rw_dwork, ks7010_rw_function);
1028 ks7010_card_init(priv);
1029
1030 ret = register_netdev(priv->net_dev);
1031 if (ret)
1032 goto err_destroy_wq;
1033
1034 return 0;
1035
1036 err_destroy_wq:
1037 destroy_workqueue(priv->wq);
1038 err_free_netdev:
1039 free_netdev(netdev);
1040 err_release_irq:
1041 sdio_claim_host(func);
1042 sdio_release_irq(func);
1043 err_disable_func:
1044 sdio_disable_func(func);
1045 err_free_card:
1046 sdio_release_host(func);
1047 sdio_set_drvdata(func, NULL);
1048 kfree(card);
1049
1050 return -ENODEV;
1051 }
1052
1053 /* send stop request to MAC */
send_stop_request(struct sdio_func * func)1054 static int send_stop_request(struct sdio_func *func)
1055 {
1056 struct hostif_stop_request *pp;
1057 struct ks_sdio_card *card;
1058 size_t size;
1059
1060 card = sdio_get_drvdata(func);
1061
1062 pp = kzalloc(hif_align_size(sizeof(*pp)), GFP_KERNEL);
1063 if (!pp)
1064 return -ENOMEM;
1065
1066 size = sizeof(*pp) - sizeof(pp->header.size);
1067 pp->header.size = cpu_to_le16(size);
1068 pp->header.event = cpu_to_le16(HIF_STOP_REQ);
1069
1070 sdio_claim_host(func);
1071 write_to_device(card->priv, (u8 *)pp, hif_align_size(sizeof(*pp)));
1072 sdio_release_host(func);
1073
1074 kfree(pp);
1075 return 0;
1076 }
1077
ks7010_sdio_remove(struct sdio_func * func)1078 static void ks7010_sdio_remove(struct sdio_func *func)
1079 {
1080 int ret;
1081 struct ks_sdio_card *card;
1082 struct ks_wlan_private *priv;
1083
1084 card = sdio_get_drvdata(func);
1085
1086 if (!card)
1087 return;
1088
1089 priv = card->priv;
1090 if (!priv)
1091 goto err_free_card;
1092
1093 ks_wlan_net_stop(priv->net_dev);
1094
1095 /* interrupt disable */
1096 sdio_claim_host(func);
1097 sdio_writeb(func, 0, INT_ENABLE_REG, &ret);
1098 sdio_writeb(func, 0xff, INT_PENDING_REG, &ret);
1099 sdio_release_host(func);
1100
1101 ret = send_stop_request(func);
1102 if (ret) /* memory allocation failure */
1103 goto err_free_card;
1104
1105 if (priv->wq)
1106 destroy_workqueue(priv->wq);
1107
1108 hostif_exit(priv);
1109
1110 unregister_netdev(priv->net_dev);
1111
1112 trx_device_exit(priv);
1113 free_netdev(priv->net_dev);
1114 card->priv = NULL;
1115
1116 sdio_claim_host(func);
1117 sdio_release_irq(func);
1118 sdio_disable_func(func);
1119 sdio_release_host(func);
1120 err_free_card:
1121 sdio_set_drvdata(func, NULL);
1122 kfree(card);
1123 }
1124
1125 static const struct sdio_device_id ks7010_sdio_ids[] = {
1126 {SDIO_DEVICE(SDIO_VENDOR_ID_KS_CODE_A, SDIO_DEVICE_ID_KS_7010)},
1127 {SDIO_DEVICE(SDIO_VENDOR_ID_KS_CODE_B, SDIO_DEVICE_ID_KS_7010)},
1128 { /* all zero */ }
1129 };
1130 MODULE_DEVICE_TABLE(sdio, ks7010_sdio_ids);
1131
1132 static struct sdio_driver ks7010_sdio_driver = {
1133 .name = "ks7010_sdio",
1134 .id_table = ks7010_sdio_ids,
1135 .probe = ks7010_sdio_probe,
1136 .remove = ks7010_sdio_remove,
1137 };
1138
1139 module_driver(ks7010_sdio_driver, sdio_register_driver, sdio_unregister_driver);
1140 MODULE_AUTHOR("Sang Engineering, Qi-Hardware, KeyStream");
1141 MODULE_DESCRIPTION("Driver for KeyStream KS7010 based SDIO cards");
1142 MODULE_LICENSE("GPL v2");
1143 MODULE_FIRMWARE(ROM_FILE);
1144