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 | |
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) */ |
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, addr: address, err_ret: &ret); |
127 | |
128 | return ret; |
129 | } |
130 | |
131 | /* Read length bytes from device address into buffer (CMD53) */ |
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, dst: buffer, addr: address, count: length); |
138 | } |
139 | |
140 | /* Write single byte to device address (CMD52) */ |
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, b: byte, addr: address, err_ret: &ret); |
148 | |
149 | return ret; |
150 | } |
151 | |
152 | /* Write length bytes to device address from buffer (CMD53) */ |
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, addr: address, src: buffer, count: length); |
159 | } |
160 | |
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(v: &priv->sleepstatus.doze_request, i: 0); |
167 | |
168 | if (atomic_read(v: &priv->sleepstatus.status) == 0) { |
169 | ret = ks7010_sdio_writeb(priv, GCR_B_REG, byte: GCR_B_DOZE); |
170 | if (ret) { |
171 | netdev_err(dev: priv->net_dev, format: "write GCR_B_REG\n" ); |
172 | goto set_sleep_mode; |
173 | } |
174 | atomic_set(v: &priv->sleepstatus.status, i: 1); |
175 | priv->last_doze = jiffies; |
176 | } |
177 | |
178 | set_sleep_mode: |
179 | priv->sleep_mode = atomic_read(v: &priv->sleepstatus.status); |
180 | } |
181 | |
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(v: &priv->sleepstatus.wakeup_request, i: 0); |
188 | |
189 | if (atomic_read(v: &priv->sleepstatus.status) == 1) { |
190 | ret = ks7010_sdio_writeb(priv, WAKEUP_REG, WAKEUP_REQ); |
191 | if (ret) { |
192 | netdev_err(dev: priv->net_dev, format: "write WAKEUP_REG\n" ); |
193 | goto set_sleep_mode; |
194 | } |
195 | atomic_set(v: &priv->sleepstatus.status, i: 0); |
196 | priv->last_wakeup = jiffies; |
197 | ++priv->wakeup_count; |
198 | } |
199 | |
200 | set_sleep_mode: |
201 | priv->sleep_mode = atomic_read(v: &priv->sleepstatus.status); |
202 | } |
203 | |
204 | void ks_wlan_hw_wakeup_request(struct ks_wlan_private *priv) |
205 | { |
206 | int ret; |
207 | |
208 | if (atomic_read(v: &priv->psstatus.status) == PS_SNOOZE) { |
209 | ret = ks7010_sdio_writeb(priv, WAKEUP_REG, WAKEUP_REQ); |
210 | if (ret) |
211 | netdev_err(dev: priv->net_dev, format: "write WAKEUP_REG\n" ); |
212 | |
213 | priv->last_wakeup = jiffies; |
214 | ++priv->wakeup_count; |
215 | } |
216 | } |
217 | |
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(status: priv->connect_status)) |
230 | return; |
231 | |
232 | if (priv->dev_state != DEVICE_STATE_SLEEP) |
233 | return; |
234 | |
235 | if (atomic_read(v: &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(v: &priv->psstatus.confirm_wait) || |
250 | atomic_read(v: &priv->psstatus.snooze_guard) || |
251 | txq_has_space(priv)) { |
252 | queue_delayed_work(wq: priv->wq, dwork: &priv->rw_dwork, delay: 0); |
253 | return; |
254 | } |
255 | |
256 | ret = ks7010_sdio_readb(priv, INT_PENDING_REG, byte: &byte); |
257 | if (ret) { |
258 | netdev_err(dev: priv->net_dev, format: "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, byte: GCR_B_DOZE); |
265 | if (ret) { |
266 | netdev_err(dev: priv->net_dev, format: "write GCR_B_REG\n" ); |
267 | goto queue_delayed_work; |
268 | } |
269 | atomic_set(v: &priv->psstatus.status, i: PS_SNOOZE); |
270 | |
271 | return; |
272 | |
273 | queue_delayed_work: |
274 | queue_delayed_work(wq: priv->wq, dwork: &priv->rw_dwork, delay: 1); |
275 | } |
276 | |
277 | int ks_wlan_hw_power_save(struct ks_wlan_private *priv) |
278 | { |
279 | queue_delayed_work(wq: priv->wq, dwork: &priv->rw_dwork, delay: 1); |
280 | return 0; |
281 | } |
282 | |
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(dev: priv->net_dev, format: "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(objp: p); |
314 | if (complete_handler) |
315 | (*complete_handler)(priv, skb); |
316 | |
317 | return ret; |
318 | } |
319 | |
320 | /* write data */ |
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(dev: priv->net_dev, format: "unknown event=%04X\n" , hdr->event); |
332 | return 0; |
333 | } |
334 | |
335 | ret = ks7010_sdio_write(priv, DATA_WINDOW, buffer, length: size); |
336 | if (ret) { |
337 | netdev_err(dev: priv->net_dev, format: "write DATA_WINDOW\n" ); |
338 | return ret; |
339 | } |
340 | |
341 | ret = ks7010_sdio_writeb(priv, WRITE_STATUS_REG, byte: REG_STATUS_BUSY); |
342 | if (ret) { |
343 | netdev_err(dev: priv->net_dev, format: "write WRITE_STATUS_REG\n" ); |
344 | return ret; |
345 | } |
346 | |
347 | return 0; |
348 | } |
349 | |
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(v: &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, buffer: sp->sendp, size: sp->size); |
362 | if (ret) { |
363 | netdev_err(dev: priv->net_dev, |
364 | format: "write_to_device error !!(%d)\n" , ret); |
365 | queue_delayed_work(wq: priv->wq, dwork: &priv->rw_dwork, delay: 1); |
366 | return; |
367 | } |
368 | } |
369 | kfree(objp: 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(wq: priv->wq, dwork: &priv->rw_dwork, delay: 0); |
376 | } |
377 | |
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(dev: priv->net_dev, format: "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(lock: &priv->tx_dev.tx_dev_lock); |
399 | result = enqueue_txdev(priv, p, size, complete_handler, skb); |
400 | spin_unlock_bh(lock: &priv->tx_dev.tx_dev_lock); |
401 | |
402 | if (txq_has_space(priv)) |
403 | queue_delayed_work(wq: priv->wq, dwork: &priv->rw_dwork, delay: 0); |
404 | |
405 | return result; |
406 | } |
407 | |
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, p: rp->data, size: rp->size); |
416 | inc_rxqhead(priv); |
417 | |
418 | if (rxq_has_space(priv)) |
419 | tasklet_schedule(t: &priv->rx_bh_task); |
420 | } |
421 | } |
422 | |
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(dev: priv->net_dev, format: "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, buffer: &rx_buffer->data[0], |
438 | length: 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 | byte: REG_STATUS_IDLE); |
451 | if (ret) |
452 | netdev_err(dev: priv->net_dev, format: "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, byte: REG_STATUS_IDLE); |
464 | if (ret) |
465 | netdev_err(dev: priv->net_dev, format: "write READ_STATUS_REG\n" ); |
466 | |
467 | if (atomic_read(v: &priv->psstatus.confirm_wait) && is_hif_conf(event)) { |
468 | netdev_dbg(priv->net_dev, "IS_HIF_CONF true !!\n" ); |
469 | atomic_dec(v: &priv->psstatus.confirm_wait); |
470 | } |
471 | |
472 | tasklet_schedule(t: &priv->rx_bh_task); |
473 | } |
474 | |
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(wq: priv->wq, dwork: &priv->rw_dwork, delay: 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(msecs: 30); |
497 | } |
498 | |
499 | sdio_claim_host(func); |
500 | |
501 | /* power save wakeup */ |
502 | if (atomic_read(v: &priv->psstatus.status) == PS_SNOOZE) { |
503 | if (txq_has_space(priv)) { |
504 | ks_wlan_hw_wakeup_request(priv); |
505 | queue_delayed_work(wq: priv->wq, dwork: &priv->rw_dwork, delay: 1); |
506 | } |
507 | goto release_host; |
508 | } |
509 | |
510 | /* sleep mode doze */ |
511 | if (atomic_read(v: &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(v: &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: &byte); |
523 | if (ret) { |
524 | netdev_err(dev: priv->net_dev, format: "read WSTATUS_RSIZE_REG psstatus=%d\n" , |
525 | atomic_read(v: &priv->psstatus.status)); |
526 | goto release_host; |
527 | } |
528 | |
529 | if (byte & RSIZE_MASK) { /* Read schedule */ |
530 | ks_wlan_hw_rx(priv, size: (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 | |
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, byte: &status); |
555 | if (ret) { |
556 | netdev_err(dev: priv->net_dev, format: "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(v: &priv->psstatus.status) == PS_SNOOZE) { |
567 | ret = ks7010_sdio_readb(priv, GCR_B_REG, byte: &byte); |
568 | if (ret) { |
569 | netdev_err(dev: priv->net_dev, format: "read GCR_B_REG\n" ); |
570 | goto queue_delayed_work; |
571 | } |
572 | if (byte == GCR_B_ACTIVE) { |
573 | if (atomic_read(v: &priv->psstatus.status) == PS_SNOOZE) { |
574 | atomic_set(v: &priv->psstatus.status, i: 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: &byte); |
584 | if (ret) { |
585 | netdev_err(dev: priv->net_dev, format: "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: (size_t)(rsize << 4)); |
591 | |
592 | if (byte & WSTATUS_MASK) { |
593 | if (atomic_read(v: &priv->psstatus.status) == PS_SNOOZE) { |
594 | if (txq_has_space(priv)) { |
595 | ks_wlan_hw_wakeup_request(priv); |
596 | queue_delayed_work(wq: priv->wq, |
597 | dwork: &priv->rw_dwork, delay: 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(wq: priv->wq, dwork: &priv->rw_dwork, delay: 0); |
608 | } |
609 | |
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(t: &priv->rx_bh_task, callback: rx_event_task); |
622 | |
623 | return 0; |
624 | } |
625 | |
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(objp: 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(t: &priv->rx_bh_task); |
640 | } |
641 | |
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(p: &index, size: sizeof(u32), GFP_KERNEL); |
648 | if (!data_buf) |
649 | return -ENOMEM; |
650 | |
651 | ret = ks7010_sdio_write(priv, WRITE_INDEX_REG, buffer: data_buf, length: sizeof(index)); |
652 | if (ret) |
653 | goto err_free_data_buf; |
654 | |
655 | ret = ks7010_sdio_write(priv, READ_INDEX_REG, buffer: data_buf, length: sizeof(index)); |
656 | if (ret) |
657 | goto err_free_data_buf; |
658 | |
659 | return 0; |
660 | |
661 | err_free_data_buf: |
662 | kfree(objp: data_buf); |
663 | |
664 | return ret; |
665 | } |
666 | |
667 | #define ROM_BUFF_SIZE (64 * 1024) |
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, buffer: read_buf, length: size); |
679 | if (ret) |
680 | goto err_free_read_buf; |
681 | |
682 | if (memcmp(p: data, q: read_buf, size) != 0) { |
683 | ret = -EIO; |
684 | netdev_err(dev: priv->net_dev, format: "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(objp: read_buf); |
692 | |
693 | return ret; |
694 | } |
695 | |
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, buffer: rom_buf, length: size); |
732 | if (ret) |
733 | goto free_rom_buf; |
734 | |
735 | ret = ks7010_sdio_data_compare(priv, |
736 | DATA_WINDOW, data: 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, byte: GCR_A_REMAP); |
745 | |
746 | free_rom_buf: |
747 | kfree(objp: rom_buf); |
748 | return ret; |
749 | } |
750 | |
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: &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: &fw_entry, ROM_FILE, |
773 | device: &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(min: 10000, max: 11000); /* wait_ms(10); */ |
784 | ret = ks7010_sdio_readb(priv, GCR_A_REG, byte: &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(dev: priv->net_dev, format: "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: fw_entry); |
801 | release_host: |
802 | sdio_release_host(func); |
803 | |
804 | return ret; |
805 | } |
806 | |
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, event: init_events[ev]); |
822 | } |
823 | |
824 | static void ks7010_card_init(struct ks_wlan_private *priv) |
825 | { |
826 | init_completion(x: &priv->confirm_wait); |
827 | |
828 | /* get mac address & firmware version */ |
829 | hostif_sme_enqueue(priv, event: SME_START); |
830 | |
831 | if (!wait_for_completion_interruptible_timeout |
832 | (x: &priv->confirm_wait, timeout: 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 | (x: &priv->confirm_wait, timeout: 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 | |
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 | |
879 | static int ks7010_sdio_setup_irqs(struct sdio_func *func) |
880 | { |
881 | int ret; |
882 | |
883 | /* interrupt disable */ |
884 | sdio_writeb(func, b: 0, INT_ENABLE_REG, err_ret: &ret); |
885 | if (ret) |
886 | goto irq_error; |
887 | |
888 | sdio_writeb(func, b: 0xff, INT_PENDING_REG, err_ret: &ret); |
889 | if (ret) |
890 | goto irq_error; |
891 | |
892 | /* setup interrupt handler */ |
893 | ret = sdio_claim_irq(func, handler: ks_sdio_interrupt); |
894 | |
895 | irq_error: |
896 | return ret; |
897 | } |
898 | |
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, byte: 0xff); |
912 | sdio_release_host(func); |
913 | if (ret) |
914 | netdev_err(dev: priv->net_dev, format: "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(dev: priv->net_dev, format: "write INT_ENABLE_REG\n" ); |
923 | } |
924 | |
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(v: &priv->sleepstatus.status, i: 0); |
943 | atomic_set(v: &priv->sleepstatus.doze_request, i: 0); |
944 | atomic_set(v: &priv->sleepstatus.wakeup_request, i: 0); |
945 | |
946 | trx_device_init(priv); |
947 | hostif_init(priv); |
948 | ks_wlan_net_start(dev: netdev); |
949 | ks7010_init_defaults(priv); |
950 | } |
951 | |
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(size: 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(dev: netdev, name: "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(dev: 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(dev: priv->net_dev, |
1013 | format: "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(fmt: "wq" , flags: WQ_MEM_RECLAIM, max_active: 1); |
1022 | if (!priv->wq) { |
1023 | netdev_err(dev: priv->net_dev, format: "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(dev: priv->net_dev); |
1031 | if (ret) |
1032 | goto err_destroy_wq; |
1033 | |
1034 | return 0; |
1035 | |
1036 | err_destroy_wq: |
1037 | destroy_workqueue(wq: priv->wq); |
1038 | err_free_netdev: |
1039 | free_netdev(dev: 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(objp: card); |
1049 | |
1050 | return -ENODEV; |
1051 | } |
1052 | |
1053 | /* send stop request to MAC */ |
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(size: hif_align_size(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(priv: card->priv, buffer: (u8 *)pp, size: hif_align_size(size: sizeof(*pp))); |
1072 | sdio_release_host(func); |
1073 | |
1074 | kfree(objp: pp); |
1075 | return 0; |
1076 | } |
1077 | |
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(dev: priv->net_dev); |
1094 | |
1095 | /* interrupt disable */ |
1096 | sdio_claim_host(func); |
1097 | sdio_writeb(func, b: 0, INT_ENABLE_REG, err_ret: &ret); |
1098 | sdio_writeb(func, b: 0xff, INT_PENDING_REG, err_ret: &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(wq: priv->wq); |
1107 | |
1108 | hostif_exit(priv); |
1109 | |
1110 | unregister_netdev(dev: priv->net_dev); |
1111 | |
1112 | trx_device_exit(priv); |
1113 | free_netdev(dev: 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(objp: 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 | |