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247e9cff SA |
1 | /* |
2 | * Copyright (c) 2012 GCT Semiconductor, Inc. All rights reserved. | |
3 | * | |
4 | * This software is licensed under the terms of the GNU General Public | |
5 | * License version 2, as published by the Free Software Foundation, and | |
6 | * may be copied, distributed, and modified under those terms. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/kernel.h> | |
247e9cff SA |
17 | |
18 | #include <linux/mmc/core.h> | |
19 | #include <linux/mmc/card.h> | |
20 | #include <linux/mmc/sdio_func.h> | |
21 | #include <linux/mmc/sdio_ids.h> | |
22 | ||
23 | #include "gdm_sdio.h" | |
24 | #include "gdm_wimax.h" | |
25 | #include "sdio_boot.h" | |
26 | #include "hci.h" | |
27 | ||
28 | #define TYPE_A_HEADER_SIZE 4 | |
29 | #define TYPE_A_LOOKAHEAD_SIZE 16 | |
30 | ||
31 | #define MAX_NR_RX_BUF 4 | |
32 | ||
33 | #define SDU_TX_BUF_SIZE 2048 | |
34 | #define TX_BUF_SIZE 2048 | |
35 | #define TX_CHUNK_SIZE (2048 - TYPE_A_HEADER_SIZE) | |
36 | #define RX_BUF_SIZE (25*1024) | |
37 | ||
38 | #define TX_HZ 2000 | |
39 | #define TX_INTERVAL (1000000/TX_HZ) | |
40 | ||
41 | /*#define DEBUG*/ | |
42 | ||
43 | static int init_sdio(struct sdiowm_dev *sdev); | |
44 | static void release_sdio(struct sdiowm_dev *sdev); | |
45 | ||
46 | #ifdef DEBUG | |
47 | static void hexdump(char *title, u8 *data, int len) | |
48 | { | |
49 | int i; | |
50 | ||
51 | printk(KERN_DEBUG "%s: length = %d\n", title, len); | |
52 | for (i = 0; i < len; i++) { | |
53 | printk(KERN_DEBUG "%02x ", data[i]); | |
54 | if ((i & 0xf) == 0xf) | |
55 | printk(KERN_DEBUG "\n"); | |
56 | } | |
57 | printk(KERN_DEBUG "\n"); | |
58 | } | |
59 | #endif | |
60 | ||
61 | static struct sdio_tx *alloc_tx_struct(struct tx_cxt *tx) | |
62 | { | |
129575f2 | 63 | struct sdio_tx *t = kzalloc(sizeof(*t), GFP_ATOMIC); |
247e9cff | 64 | |
129575f2 BC |
65 | if (!t) |
66 | return NULL; | |
247e9cff | 67 | |
247e9cff | 68 | t->buf = kmalloc(TX_BUF_SIZE, GFP_ATOMIC); |
129575f2 BC |
69 | if (!t->buf) { |
70 | kfree(t); | |
71 | return NULL; | |
72 | } | |
247e9cff SA |
73 | |
74 | t->tx_cxt = tx; | |
75 | ||
76 | return t; | |
247e9cff SA |
77 | } |
78 | ||
79 | static void free_tx_struct(struct sdio_tx *t) | |
80 | { | |
81 | if (t) { | |
82 | kfree(t->buf); | |
83 | kfree(t); | |
84 | } | |
85 | } | |
86 | ||
87 | static struct sdio_rx *alloc_rx_struct(struct rx_cxt *rx) | |
88 | { | |
129575f2 | 89 | struct sdio_rx *r = kzalloc(sizeof(*r), GFP_ATOMIC); |
247e9cff | 90 | |
129575f2 BC |
91 | if (r) |
92 | r->rx_cxt = rx; | |
247e9cff SA |
93 | |
94 | return r; | |
247e9cff SA |
95 | } |
96 | ||
97 | static void free_rx_struct(struct sdio_rx *r) | |
98 | { | |
99 | kfree(r); | |
100 | } | |
101 | ||
102 | /* Before this function is called, spin lock should be locked. */ | |
103 | static struct sdio_tx *get_tx_struct(struct tx_cxt *tx, int *no_spc) | |
104 | { | |
105 | struct sdio_tx *t; | |
106 | ||
107 | if (list_empty(&tx->free_list)) | |
108 | return NULL; | |
109 | ||
110 | t = list_entry(tx->free_list.prev, struct sdio_tx, list); | |
111 | list_del(&t->list); | |
112 | ||
113 | *no_spc = list_empty(&tx->free_list) ? 1 : 0; | |
114 | ||
115 | return t; | |
116 | } | |
117 | ||
118 | /* Before this function is called, spin lock should be locked. */ | |
119 | static void put_tx_struct(struct tx_cxt *tx, struct sdio_tx *t) | |
120 | { | |
121 | list_add_tail(&t->list, &tx->free_list); | |
122 | } | |
123 | ||
124 | /* Before this function is called, spin lock should be locked. */ | |
125 | static struct sdio_rx *get_rx_struct(struct rx_cxt *rx) | |
126 | { | |
127 | struct sdio_rx *r; | |
128 | ||
129 | if (list_empty(&rx->free_list)) | |
130 | return NULL; | |
131 | ||
132 | r = list_entry(rx->free_list.prev, struct sdio_rx, list); | |
133 | list_del(&r->list); | |
134 | ||
135 | return r; | |
136 | } | |
137 | ||
138 | /* Before this function is called, spin lock should be locked. */ | |
139 | static void put_rx_struct(struct rx_cxt *rx, struct sdio_rx *r) | |
140 | { | |
141 | list_add_tail(&r->list, &rx->free_list); | |
142 | } | |
143 | ||
144 | static int init_sdio(struct sdiowm_dev *sdev) | |
145 | { | |
146 | int ret = 0, i; | |
147 | struct tx_cxt *tx = &sdev->tx; | |
148 | struct rx_cxt *rx = &sdev->rx; | |
149 | struct sdio_tx *t; | |
150 | struct sdio_rx *r; | |
151 | ||
152 | INIT_LIST_HEAD(&tx->free_list); | |
153 | INIT_LIST_HEAD(&tx->sdu_list); | |
154 | INIT_LIST_HEAD(&tx->hci_list); | |
155 | ||
156 | spin_lock_init(&tx->lock); | |
157 | ||
158 | tx->sdu_buf = kmalloc(SDU_TX_BUF_SIZE, GFP_KERNEL); | |
159 | if (tx->sdu_buf == NULL) { | |
160 | printk(KERN_ERR "Failed to allocate SDU tx buffer.\n"); | |
161 | goto fail; | |
162 | } | |
163 | ||
164 | for (i = 0; i < MAX_NR_SDU_BUF; i++) { | |
165 | t = alloc_tx_struct(tx); | |
166 | if (t == NULL) { | |
167 | ret = -ENOMEM; | |
168 | goto fail; | |
169 | } | |
170 | list_add(&t->list, &tx->free_list); | |
171 | } | |
172 | ||
173 | INIT_LIST_HEAD(&rx->free_list); | |
174 | INIT_LIST_HEAD(&rx->req_list); | |
175 | ||
176 | spin_lock_init(&rx->lock); | |
177 | ||
178 | for (i = 0; i < MAX_NR_RX_BUF; i++) { | |
179 | r = alloc_rx_struct(rx); | |
180 | if (r == NULL) { | |
181 | ret = -ENOMEM; | |
182 | goto fail; | |
183 | } | |
184 | list_add(&r->list, &rx->free_list); | |
185 | } | |
186 | ||
187 | rx->rx_buf = kmalloc(RX_BUF_SIZE, GFP_KERNEL); | |
188 | if (rx->rx_buf == NULL) { | |
189 | printk(KERN_ERR "Failed to allocate rx buffer.\n"); | |
190 | goto fail; | |
191 | } | |
192 | ||
193 | return 0; | |
194 | ||
195 | fail: | |
196 | release_sdio(sdev); | |
197 | return ret; | |
198 | } | |
199 | ||
200 | static void release_sdio(struct sdiowm_dev *sdev) | |
201 | { | |
202 | struct tx_cxt *tx = &sdev->tx; | |
203 | struct rx_cxt *rx = &sdev->rx; | |
204 | struct sdio_tx *t, *t_next; | |
205 | struct sdio_rx *r, *r_next; | |
206 | ||
207 | kfree(tx->sdu_buf); | |
208 | ||
209 | list_for_each_entry_safe(t, t_next, &tx->free_list, list) { | |
210 | list_del(&t->list); | |
211 | free_tx_struct(t); | |
212 | } | |
213 | ||
214 | list_for_each_entry_safe(t, t_next, &tx->sdu_list, list) { | |
215 | list_del(&t->list); | |
216 | free_tx_struct(t); | |
217 | } | |
218 | ||
219 | list_for_each_entry_safe(t, t_next, &tx->hci_list, list) { | |
220 | list_del(&t->list); | |
221 | free_tx_struct(t); | |
222 | } | |
223 | ||
224 | kfree(rx->rx_buf); | |
225 | ||
226 | list_for_each_entry_safe(r, r_next, &rx->free_list, list) { | |
227 | list_del(&r->list); | |
228 | free_rx_struct(r); | |
229 | } | |
230 | ||
231 | list_for_each_entry_safe(r, r_next, &rx->req_list, list) { | |
232 | list_del(&r->list); | |
233 | free_rx_struct(r); | |
234 | } | |
235 | } | |
236 | ||
237 | static void send_sdio_pkt(struct sdio_func *func, u8 *data, int len) | |
238 | { | |
239 | int n, blocks, ret, remain; | |
240 | ||
241 | sdio_claim_host(func); | |
242 | ||
243 | blocks = len / func->cur_blksize; | |
244 | n = blocks * func->cur_blksize; | |
245 | if (blocks) { | |
246 | ret = sdio_memcpy_toio(func, 0, data, n); | |
247 | if (ret < 0) { | |
248 | if (ret != -ENOMEDIUM) | |
249 | printk(KERN_ERR "gdmwms: %s error: ret = %d\n", | |
250 | __func__, ret); | |
251 | goto end_io; | |
252 | } | |
253 | } | |
254 | ||
255 | remain = len - n; | |
256 | remain = (remain + 3) & ~3; | |
257 | ||
258 | if (remain) { | |
259 | ret = sdio_memcpy_toio(func, 0, data + n, remain); | |
260 | if (ret < 0) { | |
261 | if (ret != -ENOMEDIUM) | |
262 | printk(KERN_ERR "gdmwms: %s error: ret = %d\n", | |
263 | __func__, ret); | |
264 | goto end_io; | |
265 | } | |
266 | } | |
267 | ||
268 | end_io: | |
269 | sdio_release_host(func); | |
270 | } | |
271 | ||
272 | static void send_sdu(struct sdio_func *func, struct tx_cxt *tx) | |
273 | { | |
274 | struct list_head *l, *next; | |
275 | struct hci_s *hci; | |
276 | struct sdio_tx *t; | |
277 | int pos, len, i, estlen, aggr_num = 0, aggr_len; | |
278 | u8 *buf; | |
279 | unsigned long flags; | |
280 | ||
281 | spin_lock_irqsave(&tx->lock, flags); | |
282 | ||
283 | pos = TYPE_A_HEADER_SIZE + HCI_HEADER_SIZE; | |
284 | list_for_each_entry(t, &tx->sdu_list, list) { | |
285 | estlen = ((t->len + 3) & ~3) + 4; | |
286 | if ((pos + estlen) > SDU_TX_BUF_SIZE) | |
287 | break; | |
288 | ||
289 | aggr_num++; | |
290 | memcpy(tx->sdu_buf + pos, t->buf, t->len); | |
291 | memset(tx->sdu_buf + pos + t->len, 0, estlen - t->len); | |
292 | pos += estlen; | |
293 | } | |
294 | aggr_len = pos; | |
295 | ||
296 | hci = (struct hci_s *)(tx->sdu_buf + TYPE_A_HEADER_SIZE); | |
297 | hci->cmd_evt = H2B(WIMAX_TX_SDU_AGGR); | |
298 | hci->length = H2B(aggr_len - TYPE_A_HEADER_SIZE - HCI_HEADER_SIZE); | |
299 | ||
300 | spin_unlock_irqrestore(&tx->lock, flags); | |
301 | ||
302 | #ifdef DEBUG | |
303 | hexdump("sdio_send", tx->sdu_buf + TYPE_A_HEADER_SIZE, | |
304 | aggr_len - TYPE_A_HEADER_SIZE); | |
305 | #endif | |
306 | ||
307 | for (pos = TYPE_A_HEADER_SIZE; pos < aggr_len; pos += TX_CHUNK_SIZE) { | |
308 | len = aggr_len - pos; | |
309 | len = len > TX_CHUNK_SIZE ? TX_CHUNK_SIZE : len; | |
310 | buf = tx->sdu_buf + pos - TYPE_A_HEADER_SIZE; | |
311 | ||
312 | buf[0] = len & 0xff; | |
313 | buf[1] = (len >> 8) & 0xff; | |
314 | buf[2] = (len >> 16) & 0xff; | |
315 | buf[3] = (pos + len) >= aggr_len ? 0 : 1; | |
316 | send_sdio_pkt(func, buf, len + TYPE_A_HEADER_SIZE); | |
317 | } | |
318 | ||
319 | spin_lock_irqsave(&tx->lock, flags); | |
320 | ||
321 | for (l = tx->sdu_list.next, i = 0; i < aggr_num; i++, l = next) { | |
322 | next = l->next; | |
323 | t = list_entry(l, struct sdio_tx, list); | |
324 | if (t->callback) | |
325 | t->callback(t->cb_data); | |
326 | ||
327 | list_del(l); | |
328 | put_tx_struct(t->tx_cxt, t); | |
329 | } | |
330 | ||
331 | do_gettimeofday(&tx->sdu_stamp); | |
332 | spin_unlock_irqrestore(&tx->lock, flags); | |
333 | } | |
334 | ||
335 | static void send_hci(struct sdio_func *func, struct tx_cxt *tx, | |
336 | struct sdio_tx *t) | |
337 | { | |
338 | unsigned long flags; | |
339 | ||
340 | #ifdef DEBUG | |
341 | hexdump("sdio_send", t->buf + TYPE_A_HEADER_SIZE, | |
342 | t->len - TYPE_A_HEADER_SIZE); | |
343 | #endif | |
344 | send_sdio_pkt(func, t->buf, t->len); | |
345 | ||
346 | spin_lock_irqsave(&tx->lock, flags); | |
347 | if (t->callback) | |
348 | t->callback(t->cb_data); | |
349 | free_tx_struct(t); | |
350 | spin_unlock_irqrestore(&tx->lock, flags); | |
351 | } | |
352 | ||
353 | static void do_tx(struct work_struct *work) | |
354 | { | |
355 | struct sdiowm_dev *sdev = container_of(work, struct sdiowm_dev, ws); | |
356 | struct sdio_func *func = sdev->func; | |
357 | struct tx_cxt *tx = &sdev->tx; | |
358 | struct sdio_tx *t = NULL; | |
359 | struct timeval now, *before; | |
360 | int is_sdu = 0; | |
361 | long diff; | |
362 | unsigned long flags; | |
363 | ||
364 | spin_lock_irqsave(&tx->lock, flags); | |
365 | if (!tx->can_send) { | |
366 | spin_unlock_irqrestore(&tx->lock, flags); | |
367 | return; | |
368 | } | |
369 | ||
370 | if (!list_empty(&tx->hci_list)) { | |
371 | t = list_entry(tx->hci_list.next, struct sdio_tx, list); | |
372 | list_del(&t->list); | |
373 | is_sdu = 0; | |
374 | } else if (!tx->stop_sdu_tx && !list_empty(&tx->sdu_list)) { | |
375 | do_gettimeofday(&now); | |
376 | before = &tx->sdu_stamp; | |
377 | ||
378 | diff = (now.tv_sec - before->tv_sec) * 1000000 + | |
379 | (now.tv_usec - before->tv_usec); | |
380 | if (diff >= 0 && diff < TX_INTERVAL) { | |
381 | schedule_work(&sdev->ws); | |
382 | spin_unlock_irqrestore(&tx->lock, flags); | |
383 | return; | |
384 | } | |
385 | is_sdu = 1; | |
386 | } | |
387 | ||
388 | if (!is_sdu && t == NULL) { | |
389 | spin_unlock_irqrestore(&tx->lock, flags); | |
390 | return; | |
391 | } | |
392 | ||
393 | tx->can_send = 0; | |
394 | ||
395 | spin_unlock_irqrestore(&tx->lock, flags); | |
396 | ||
397 | if (is_sdu) | |
398 | send_sdu(func, tx); | |
399 | else | |
400 | send_hci(func, tx, t); | |
401 | } | |
402 | ||
403 | static int gdm_sdio_send(void *priv_dev, void *data, int len, | |
404 | void (*cb)(void *data), void *cb_data) | |
405 | { | |
406 | struct sdiowm_dev *sdev = priv_dev; | |
407 | struct tx_cxt *tx = &sdev->tx; | |
408 | struct sdio_tx *t; | |
409 | u8 *pkt = data; | |
410 | int no_spc = 0; | |
411 | u16 cmd_evt; | |
412 | unsigned long flags; | |
413 | ||
414 | BUG_ON(len > TX_BUF_SIZE - TYPE_A_HEADER_SIZE); | |
415 | ||
416 | spin_lock_irqsave(&tx->lock, flags); | |
417 | ||
418 | cmd_evt = (pkt[0] << 8) | pkt[1]; | |
419 | if (cmd_evt == WIMAX_TX_SDU) { | |
420 | t = get_tx_struct(tx, &no_spc); | |
421 | if (t == NULL) { | |
422 | /* This case must not happen. */ | |
423 | spin_unlock_irqrestore(&tx->lock, flags); | |
424 | return -ENOSPC; | |
425 | } | |
426 | list_add_tail(&t->list, &tx->sdu_list); | |
427 | ||
428 | memcpy(t->buf, data, len); | |
429 | ||
430 | t->len = len; | |
431 | t->callback = cb; | |
432 | t->cb_data = cb_data; | |
433 | } else { | |
434 | t = alloc_tx_struct(tx); | |
435 | if (t == NULL) { | |
436 | spin_unlock_irqrestore(&tx->lock, flags); | |
437 | return -ENOMEM; | |
438 | } | |
439 | list_add_tail(&t->list, &tx->hci_list); | |
440 | ||
441 | t->buf[0] = len & 0xff; | |
442 | t->buf[1] = (len >> 8) & 0xff; | |
443 | t->buf[2] = (len >> 16) & 0xff; | |
444 | t->buf[3] = 2; | |
445 | memcpy(t->buf + TYPE_A_HEADER_SIZE, data, len); | |
446 | ||
447 | t->len = len + TYPE_A_HEADER_SIZE; | |
448 | t->callback = cb; | |
449 | t->cb_data = cb_data; | |
450 | } | |
451 | ||
452 | if (tx->can_send) | |
453 | schedule_work(&sdev->ws); | |
454 | ||
455 | spin_unlock_irqrestore(&tx->lock, flags); | |
456 | ||
457 | if (no_spc) | |
458 | return -ENOSPC; | |
459 | ||
460 | return 0; | |
461 | } | |
462 | ||
463 | /* | |
464 | * Handle the HCI, WIMAX_SDU_TX_FLOW. | |
465 | */ | |
466 | static int control_sdu_tx_flow(struct sdiowm_dev *sdev, u8 *hci_data, int len) | |
467 | { | |
468 | struct tx_cxt *tx = &sdev->tx; | |
469 | u16 cmd_evt; | |
470 | unsigned long flags; | |
471 | ||
472 | spin_lock_irqsave(&tx->lock, flags); | |
473 | ||
474 | cmd_evt = (hci_data[0] << 8) | (hci_data[1]); | |
475 | if (cmd_evt != WIMAX_SDU_TX_FLOW) | |
476 | goto out; | |
477 | ||
478 | if (hci_data[4] == 0) { | |
479 | #ifdef DEBUG | |
480 | printk(KERN_DEBUG "WIMAX ==> STOP SDU TX\n"); | |
481 | #endif | |
482 | tx->stop_sdu_tx = 1; | |
483 | } else if (hci_data[4] == 1) { | |
484 | #ifdef DEBUG | |
485 | printk(KERN_DEBUG "WIMAX ==> START SDU TX\n"); | |
486 | #endif | |
487 | tx->stop_sdu_tx = 0; | |
488 | if (tx->can_send) | |
489 | schedule_work(&sdev->ws); | |
490 | /* | |
491 | * If free buffer for sdu tx doesn't exist, then tx queue | |
492 | * should not be woken. For this reason, don't pass the command, | |
493 | * START_SDU_TX. | |
494 | */ | |
495 | if (list_empty(&tx->free_list)) | |
496 | len = 0; | |
497 | } | |
498 | ||
499 | out: | |
500 | spin_unlock_irqrestore(&tx->lock, flags); | |
501 | return len; | |
502 | } | |
503 | ||
504 | static void gdm_sdio_irq(struct sdio_func *func) | |
505 | { | |
506 | struct phy_dev *phy_dev = sdio_get_drvdata(func); | |
507 | struct sdiowm_dev *sdev = phy_dev->priv_dev; | |
508 | struct tx_cxt *tx = &sdev->tx; | |
509 | struct rx_cxt *rx = &sdev->rx; | |
510 | struct sdio_rx *r; | |
511 | unsigned long flags; | |
512 | u8 val, hdr[TYPE_A_LOOKAHEAD_SIZE], *buf; | |
513 | u32 len, blocks, n; | |
514 | int ret, remain; | |
515 | ||
516 | /* Check interrupt */ | |
517 | val = sdio_readb(func, 0x13, &ret); | |
518 | if (val & 0x01) | |
519 | sdio_writeb(func, 0x01, 0x13, &ret); /* clear interrupt */ | |
520 | else | |
521 | return; | |
522 | ||
523 | ret = sdio_memcpy_fromio(func, hdr, 0x0, TYPE_A_LOOKAHEAD_SIZE); | |
524 | if (ret) { | |
525 | printk(KERN_ERR "Cannot read from function %d\n", func->num); | |
526 | goto done; | |
527 | } | |
528 | ||
529 | len = (hdr[2] << 16) | (hdr[1] << 8) | hdr[0]; | |
530 | if (len > (RX_BUF_SIZE - TYPE_A_HEADER_SIZE)) { | |
531 | printk(KERN_ERR "Too big Type-A size: %d\n", len); | |
532 | goto done; | |
533 | } | |
534 | ||
535 | if (hdr[3] == 1) { /* Ack */ | |
536 | #ifdef DEBUG | |
537 | u32 *ack_seq = (u32 *)&hdr[4]; | |
538 | #endif | |
539 | spin_lock_irqsave(&tx->lock, flags); | |
540 | tx->can_send = 1; | |
541 | ||
542 | if (!list_empty(&tx->sdu_list) || !list_empty(&tx->hci_list)) | |
543 | schedule_work(&sdev->ws); | |
544 | spin_unlock_irqrestore(&tx->lock, flags); | |
545 | #ifdef DEBUG | |
546 | printk(KERN_DEBUG "Ack... %0x\n", ntohl(*ack_seq)); | |
547 | #endif | |
548 | goto done; | |
549 | } | |
550 | ||
551 | memcpy(rx->rx_buf, hdr + TYPE_A_HEADER_SIZE, | |
552 | TYPE_A_LOOKAHEAD_SIZE - TYPE_A_HEADER_SIZE); | |
553 | ||
554 | buf = rx->rx_buf + TYPE_A_LOOKAHEAD_SIZE - TYPE_A_HEADER_SIZE; | |
555 | remain = len - TYPE_A_LOOKAHEAD_SIZE + TYPE_A_HEADER_SIZE; | |
556 | if (remain <= 0) | |
557 | goto end_io; | |
558 | ||
559 | blocks = remain / func->cur_blksize; | |
560 | ||
561 | if (blocks) { | |
562 | n = blocks * func->cur_blksize; | |
563 | ret = sdio_memcpy_fromio(func, buf, 0x0, n); | |
564 | if (ret) { | |
565 | printk(KERN_ERR "Cannot read from function %d\n", | |
566 | func->num); | |
567 | goto done; | |
568 | } | |
569 | buf += n; | |
570 | remain -= n; | |
571 | } | |
572 | ||
573 | if (remain) { | |
574 | ret = sdio_memcpy_fromio(func, buf, 0x0, remain); | |
575 | if (ret) { | |
576 | printk(KERN_ERR "Cannot read from function %d\n", | |
577 | func->num); | |
578 | goto done; | |
579 | } | |
580 | } | |
581 | ||
582 | end_io: | |
583 | #ifdef DEBUG | |
584 | hexdump("sdio_receive", rx->rx_buf, len); | |
585 | #endif | |
586 | len = control_sdu_tx_flow(sdev, rx->rx_buf, len); | |
587 | ||
588 | spin_lock_irqsave(&rx->lock, flags); | |
589 | ||
590 | if (!list_empty(&rx->req_list)) { | |
591 | r = list_entry(rx->req_list.next, struct sdio_rx, list); | |
592 | spin_unlock_irqrestore(&rx->lock, flags); | |
593 | if (r->callback) | |
594 | r->callback(r->cb_data, rx->rx_buf, len); | |
595 | spin_lock_irqsave(&rx->lock, flags); | |
596 | list_del(&r->list); | |
597 | put_rx_struct(rx, r); | |
598 | } | |
599 | ||
600 | spin_unlock_irqrestore(&rx->lock, flags); | |
601 | ||
602 | done: | |
603 | sdio_writeb(func, 0x00, 0x10, &ret); /* PCRRT */ | |
604 | if (!phy_dev->netdev) | |
54bc1ff1 | 605 | register_wimax_device(phy_dev, &func->dev); |
247e9cff SA |
606 | } |
607 | ||
608 | static int gdm_sdio_receive(void *priv_dev, | |
609 | void (*cb)(void *cb_data, void *data, int len), | |
610 | void *cb_data) | |
611 | { | |
612 | struct sdiowm_dev *sdev = priv_dev; | |
613 | struct rx_cxt *rx = &sdev->rx; | |
614 | struct sdio_rx *r; | |
615 | unsigned long flags; | |
616 | ||
617 | spin_lock_irqsave(&rx->lock, flags); | |
618 | r = get_rx_struct(rx); | |
619 | if (r == NULL) { | |
620 | spin_unlock_irqrestore(&rx->lock, flags); | |
621 | return -ENOMEM; | |
622 | } | |
623 | ||
624 | r->callback = cb; | |
625 | r->cb_data = cb_data; | |
626 | ||
627 | list_add_tail(&r->list, &rx->req_list); | |
628 | spin_unlock_irqrestore(&rx->lock, flags); | |
629 | ||
630 | return 0; | |
631 | } | |
632 | ||
633 | static int sdio_wimax_probe(struct sdio_func *func, | |
634 | const struct sdio_device_id *id) | |
635 | { | |
636 | int ret; | |
637 | struct phy_dev *phy_dev = NULL; | |
638 | struct sdiowm_dev *sdev = NULL; | |
639 | ||
640 | printk(KERN_INFO "Found GDM SDIO VID = 0x%04x PID = 0x%04x...\n", | |
641 | func->vendor, func->device); | |
642 | printk(KERN_INFO "GCT WiMax driver version %s\n", DRIVER_VERSION); | |
643 | ||
644 | sdio_claim_host(func); | |
645 | sdio_enable_func(func); | |
646 | sdio_claim_irq(func, gdm_sdio_irq); | |
647 | ||
648 | ret = sdio_boot(func); | |
649 | if (ret) | |
650 | return ret; | |
651 | ||
c2a1793d | 652 | phy_dev = kzalloc(sizeof(*phy_dev), GFP_KERNEL); |
247e9cff SA |
653 | if (phy_dev == NULL) { |
654 | ret = -ENOMEM; | |
655 | goto out; | |
656 | } | |
c2a1793d | 657 | sdev = kzalloc(sizeof(*sdev), GFP_KERNEL); |
247e9cff SA |
658 | if (sdev == NULL) { |
659 | ret = -ENOMEM; | |
660 | goto out; | |
661 | } | |
662 | ||
247e9cff SA |
663 | phy_dev->priv_dev = (void *)sdev; |
664 | phy_dev->send_func = gdm_sdio_send; | |
665 | phy_dev->rcv_func = gdm_sdio_receive; | |
666 | ||
667 | ret = init_sdio(sdev); | |
f1efd9fe | 668 | if (ret < 0) |
247e9cff SA |
669 | goto out; |
670 | ||
671 | sdev->func = func; | |
672 | ||
673 | sdio_writeb(func, 1, 0x14, &ret); /* Enable interrupt */ | |
674 | sdio_release_host(func); | |
675 | ||
676 | INIT_WORK(&sdev->ws, do_tx); | |
677 | ||
678 | sdio_set_drvdata(func, phy_dev); | |
679 | out: | |
680 | if (ret) { | |
681 | kfree(phy_dev); | |
682 | kfree(sdev); | |
683 | } | |
684 | ||
685 | return ret; | |
686 | } | |
687 | ||
688 | static void sdio_wimax_remove(struct sdio_func *func) | |
689 | { | |
690 | struct phy_dev *phy_dev = sdio_get_drvdata(func); | |
691 | struct sdiowm_dev *sdev = phy_dev->priv_dev; | |
692 | ||
693 | if (phy_dev->netdev) | |
694 | unregister_wimax_device(phy_dev); | |
695 | sdio_claim_host(func); | |
696 | sdio_release_irq(func); | |
697 | sdio_disable_func(func); | |
698 | sdio_release_host(func); | |
699 | release_sdio(sdev); | |
700 | ||
701 | kfree(sdev); | |
702 | kfree(phy_dev); | |
703 | } | |
704 | ||
705 | static const struct sdio_device_id sdio_wimax_ids[] = { | |
706 | { SDIO_DEVICE(0x0296, 0x5347) }, | |
707 | {0} | |
708 | }; | |
709 | ||
710 | MODULE_DEVICE_TABLE(sdio, sdio_wimax_ids); | |
711 | ||
712 | static struct sdio_driver sdio_wimax_driver = { | |
713 | .probe = sdio_wimax_probe, | |
714 | .remove = sdio_wimax_remove, | |
715 | .name = "sdio_wimax", | |
716 | .id_table = sdio_wimax_ids, | |
717 | }; | |
718 | ||
719 | static int __init sdio_gdm_wimax_init(void) | |
720 | { | |
721 | return sdio_register_driver(&sdio_wimax_driver); | |
722 | } | |
723 | ||
724 | static void __exit sdio_gdm_wimax_exit(void) | |
725 | { | |
726 | sdio_unregister_driver(&sdio_wimax_driver); | |
727 | } | |
728 | ||
729 | module_init(sdio_gdm_wimax_init); | |
730 | module_exit(sdio_gdm_wimax_exit); | |
731 | ||
732 | MODULE_VERSION(DRIVER_VERSION); | |
733 | MODULE_DESCRIPTION("GCT WiMax SDIO Device Driver"); | |
734 | MODULE_AUTHOR("Ethan Park"); | |
735 | MODULE_LICENSE("GPL"); |