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bb9f8692 ZY |
1 | /* |
2 | * Intel Wireless Multicomm 3200 WiFi driver | |
3 | * | |
4 | * Copyright (C) 2009 Intel Corporation. All rights reserved. | |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions | |
8 | * are met: | |
9 | * | |
10 | * * Redistributions of source code must retain the above copyright | |
11 | * notice, this list of conditions and the following disclaimer. | |
12 | * * Redistributions in binary form must reproduce the above copyright | |
13 | * notice, this list of conditions and the following disclaimer in | |
14 | * the documentation and/or other materials provided with the | |
15 | * distribution. | |
16 | * * Neither the name of Intel Corporation nor the names of its | |
17 | * contributors may be used to endorse or promote products derived | |
18 | * from this software without specific prior written permission. | |
19 | * | |
20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
24 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
26 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
27 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
28 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
30 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
31 | * | |
32 | * | |
33 | * Intel Corporation <ilw@linux.intel.com> | |
34 | * Samuel Ortiz <samuel.ortiz@intel.com> | |
35 | * Zhu Yi <yi.zhu@intel.com> | |
36 | * | |
37 | */ | |
38 | ||
39 | /* | |
40 | * This is the SDIO bus specific hooks for iwm. | |
41 | * It also is the module's entry point. | |
42 | * | |
43 | * Interesting code paths: | |
44 | * iwm_sdio_probe() (Called by an SDIO bus scan) | |
45 | * -> iwm_if_alloc() (netdev.c) | |
46 | * -> iwm_wdev_alloc() (cfg80211.c, allocates and register our wiphy) | |
47 | * -> wiphy_new() | |
48 | * -> wiphy_register() | |
49 | * -> alloc_netdev_mq() | |
50 | * -> register_netdev() | |
51 | * | |
52 | * iwm_sdio_remove() | |
53 | * -> iwm_if_free() (netdev.c) | |
54 | * -> unregister_netdev() | |
55 | * -> iwm_wdev_free() (cfg80211.c) | |
56 | * -> wiphy_unregister() | |
57 | * -> wiphy_free() | |
58 | * | |
59 | * iwm_sdio_isr() (called in process context from the SDIO core code) | |
60 | * -> queue_work(.., isr_worker) | |
61 | * -- [async] --> iwm_sdio_isr_worker() | |
62 | * -> iwm_rx_handle() | |
63 | */ | |
64 | ||
65 | #include <linux/kernel.h> | |
66 | #include <linux/netdevice.h> | |
67 | #include <linux/debugfs.h> | |
51def0be | 68 | #include <linux/mmc/sdio_ids.h> |
bb9f8692 ZY |
69 | #include <linux/mmc/sdio.h> |
70 | #include <linux/mmc/sdio_func.h> | |
71 | ||
72 | #include "iwm.h" | |
73 | #include "debug.h" | |
74 | #include "bus.h" | |
75 | #include "sdio.h" | |
76 | ||
77 | static void iwm_sdio_isr_worker(struct work_struct *work) | |
78 | { | |
79 | struct iwm_sdio_priv *hw; | |
80 | struct iwm_priv *iwm; | |
81 | struct iwm_rx_info *rx_info; | |
82 | struct sk_buff *skb; | |
83 | u8 *rx_buf; | |
84 | unsigned long rx_size; | |
85 | ||
86 | hw = container_of(work, struct iwm_sdio_priv, isr_worker); | |
87 | iwm = hw_to_iwm(hw); | |
88 | ||
89 | while (!skb_queue_empty(&iwm->rx_list)) { | |
90 | skb = skb_dequeue(&iwm->rx_list); | |
91 | rx_info = skb_to_rx_info(skb); | |
92 | rx_size = rx_info->rx_size; | |
93 | rx_buf = skb->data; | |
94 | ||
95 | IWM_HEXDUMP(iwm, DBG, SDIO, "RX: ", rx_buf, rx_size); | |
96 | if (iwm_rx_handle(iwm, rx_buf, rx_size) < 0) | |
97 | IWM_WARN(iwm, "RX error\n"); | |
98 | ||
99 | kfree_skb(skb); | |
100 | } | |
101 | } | |
102 | ||
103 | static void iwm_sdio_isr(struct sdio_func *func) | |
104 | { | |
105 | struct iwm_priv *iwm; | |
106 | struct iwm_sdio_priv *hw; | |
107 | struct iwm_rx_info *rx_info; | |
108 | struct sk_buff *skb; | |
109 | unsigned long buf_size, read_size; | |
110 | int ret; | |
111 | u8 val; | |
112 | ||
113 | hw = sdio_get_drvdata(func); | |
114 | iwm = hw_to_iwm(hw); | |
115 | ||
116 | buf_size = hw->blk_size; | |
117 | ||
118 | /* We're checking the status */ | |
119 | val = sdio_readb(func, IWM_SDIO_INTR_STATUS_ADDR, &ret); | |
120 | if (val == 0 || ret < 0) { | |
121 | IWM_ERR(iwm, "Wrong INTR_STATUS\n"); | |
122 | return; | |
123 | } | |
124 | ||
125 | /* See if we have free buffers */ | |
126 | if (skb_queue_len(&iwm->rx_list) > IWM_RX_LIST_SIZE) { | |
127 | IWM_ERR(iwm, "No buffer for more Rx frames\n"); | |
128 | return; | |
129 | } | |
130 | ||
131 | /* We first read the transaction size */ | |
132 | read_size = sdio_readb(func, IWM_SDIO_INTR_GET_SIZE_ADDR + 1, &ret); | |
133 | read_size = read_size << 8; | |
134 | ||
135 | if (ret < 0) { | |
136 | IWM_ERR(iwm, "Couldn't read the xfer size\n"); | |
137 | return; | |
138 | } | |
139 | ||
140 | /* We need to clear the INT register */ | |
141 | sdio_writeb(func, 1, IWM_SDIO_INTR_CLEAR_ADDR, &ret); | |
142 | if (ret < 0) { | |
143 | IWM_ERR(iwm, "Couldn't clear the INT register\n"); | |
144 | return; | |
145 | } | |
146 | ||
147 | while (buf_size < read_size) | |
148 | buf_size <<= 1; | |
149 | ||
150 | skb = dev_alloc_skb(buf_size); | |
151 | if (!skb) { | |
152 | IWM_ERR(iwm, "Couldn't alloc RX skb\n"); | |
153 | return; | |
154 | } | |
155 | rx_info = skb_to_rx_info(skb); | |
156 | rx_info->rx_size = read_size; | |
157 | rx_info->rx_buf_size = buf_size; | |
158 | ||
159 | /* Now we can read the actual buffer */ | |
160 | ret = sdio_memcpy_fromio(func, skb_put(skb, read_size), | |
161 | IWM_SDIO_DATA_ADDR, read_size); | |
162 | ||
163 | /* The skb is put on a driver's specific Rx SKB list */ | |
164 | skb_queue_tail(&iwm->rx_list, skb); | |
165 | ||
166 | /* We can now schedule the actual worker */ | |
167 | queue_work(hw->isr_wq, &hw->isr_worker); | |
168 | } | |
169 | ||
170 | static void iwm_sdio_rx_free(struct iwm_sdio_priv *hw) | |
171 | { | |
172 | struct iwm_priv *iwm = hw_to_iwm(hw); | |
173 | ||
174 | flush_workqueue(hw->isr_wq); | |
175 | ||
176 | skb_queue_purge(&iwm->rx_list); | |
177 | } | |
178 | ||
179 | /* Bus ops */ | |
180 | static int if_sdio_enable(struct iwm_priv *iwm) | |
181 | { | |
182 | struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm); | |
183 | int ret; | |
184 | ||
185 | sdio_claim_host(hw->func); | |
186 | ||
187 | ret = sdio_enable_func(hw->func); | |
188 | if (ret) { | |
189 | IWM_ERR(iwm, "Couldn't enable the device: is TOP driver " | |
190 | "loaded and functional?\n"); | |
191 | goto release_host; | |
192 | } | |
193 | ||
194 | iwm_reset(iwm); | |
195 | ||
196 | ret = sdio_claim_irq(hw->func, iwm_sdio_isr); | |
197 | if (ret) { | |
198 | IWM_ERR(iwm, "Failed to claim irq: %d\n", ret); | |
199 | goto release_host; | |
200 | } | |
201 | ||
202 | sdio_writeb(hw->func, 1, IWM_SDIO_INTR_ENABLE_ADDR, &ret); | |
203 | if (ret < 0) { | |
204 | IWM_ERR(iwm, "Couldn't enable INTR: %d\n", ret); | |
205 | goto release_irq; | |
206 | } | |
207 | ||
208 | sdio_release_host(hw->func); | |
209 | ||
210 | IWM_DBG_SDIO(iwm, INFO, "IWM SDIO enable\n"); | |
211 | ||
212 | return 0; | |
213 | ||
214 | release_irq: | |
215 | sdio_release_irq(hw->func); | |
216 | release_host: | |
217 | sdio_release_host(hw->func); | |
218 | ||
219 | return ret; | |
220 | } | |
221 | ||
222 | static int if_sdio_disable(struct iwm_priv *iwm) | |
223 | { | |
224 | struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm); | |
225 | int ret; | |
226 | ||
227 | iwm_reset(iwm); | |
228 | ||
229 | sdio_claim_host(hw->func); | |
230 | sdio_writeb(hw->func, 0, IWM_SDIO_INTR_ENABLE_ADDR, &ret); | |
231 | if (ret < 0) | |
232 | IWM_WARN(iwm, "Couldn't disable INTR: %d\n", ret); | |
233 | ||
234 | sdio_release_irq(hw->func); | |
235 | sdio_disable_func(hw->func); | |
236 | sdio_release_host(hw->func); | |
237 | ||
238 | iwm_sdio_rx_free(hw); | |
239 | ||
240 | IWM_DBG_SDIO(iwm, INFO, "IWM SDIO disable\n"); | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | static int if_sdio_send_chunk(struct iwm_priv *iwm, u8 *buf, int count) | |
246 | { | |
247 | struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm); | |
248 | int aligned_count = ALIGN(count, hw->blk_size); | |
249 | int ret; | |
250 | ||
251 | if ((unsigned long)buf & 0x3) { | |
252 | IWM_ERR(iwm, "buf <%p> is not dword aligned\n", buf); | |
253 | /* TODO: Is this a hardware limitation? use get_unligned */ | |
254 | return -EINVAL; | |
255 | } | |
256 | ||
257 | sdio_claim_host(hw->func); | |
258 | ret = sdio_memcpy_toio(hw->func, IWM_SDIO_DATA_ADDR, buf, | |
259 | aligned_count); | |
260 | sdio_release_host(hw->func); | |
261 | ||
262 | return ret; | |
263 | } | |
264 | ||
265 | /* debugfs hooks */ | |
266 | static int iwm_debugfs_sdio_open(struct inode *inode, struct file *filp) | |
267 | { | |
268 | filp->private_data = inode->i_private; | |
269 | return 0; | |
270 | } | |
271 | ||
272 | static ssize_t iwm_debugfs_sdio_read(struct file *filp, char __user *buffer, | |
273 | size_t count, loff_t *ppos) | |
274 | { | |
275 | struct iwm_priv *iwm = filp->private_data; | |
276 | struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm); | |
277 | char *buf; | |
278 | u8 cccr; | |
279 | int buf_len = 4096, ret; | |
280 | size_t len = 0; | |
281 | ||
282 | if (*ppos != 0) | |
283 | return 0; | |
284 | if (count < sizeof(buf)) | |
285 | return -ENOSPC; | |
286 | ||
287 | buf = kzalloc(buf_len, GFP_KERNEL); | |
288 | if (!buf) | |
289 | return -ENOMEM; | |
290 | ||
291 | sdio_claim_host(hw->func); | |
292 | ||
293 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_IOEx, &ret); | |
294 | if (ret) { | |
295 | IWM_ERR(iwm, "Could not read SDIO_CCCR_IOEx\n"); | |
296 | goto err; | |
297 | } | |
298 | len += snprintf(buf + len, buf_len - len, "CCCR_IOEx: 0x%x\n", cccr); | |
299 | ||
300 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_IORx, &ret); | |
301 | if (ret) { | |
302 | IWM_ERR(iwm, "Could not read SDIO_CCCR_IORx\n"); | |
303 | goto err; | |
304 | } | |
305 | len += snprintf(buf + len, buf_len - len, "CCCR_IORx: 0x%x\n", cccr); | |
306 | ||
307 | ||
308 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_IENx, &ret); | |
309 | if (ret) { | |
310 | IWM_ERR(iwm, "Could not read SDIO_CCCR_IENx\n"); | |
311 | goto err; | |
312 | } | |
313 | len += snprintf(buf + len, buf_len - len, "CCCR_IENx: 0x%x\n", cccr); | |
314 | ||
315 | ||
316 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_INTx, &ret); | |
317 | if (ret) { | |
318 | IWM_ERR(iwm, "Could not read SDIO_CCCR_INTx\n"); | |
319 | goto err; | |
320 | } | |
321 | len += snprintf(buf + len, buf_len - len, "CCCR_INTx: 0x%x\n", cccr); | |
322 | ||
323 | ||
324 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_ABORT, &ret); | |
325 | if (ret) { | |
326 | IWM_ERR(iwm, "Could not read SDIO_CCCR_ABORTx\n"); | |
327 | goto err; | |
328 | } | |
329 | len += snprintf(buf + len, buf_len - len, "CCCR_ABORT: 0x%x\n", cccr); | |
330 | ||
331 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_IF, &ret); | |
332 | if (ret) { | |
333 | IWM_ERR(iwm, "Could not read SDIO_CCCR_IF\n"); | |
334 | goto err; | |
335 | } | |
336 | len += snprintf(buf + len, buf_len - len, "CCCR_IF: 0x%x\n", cccr); | |
337 | ||
338 | ||
339 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_CAPS, &ret); | |
340 | if (ret) { | |
341 | IWM_ERR(iwm, "Could not read SDIO_CCCR_CAPS\n"); | |
342 | goto err; | |
343 | } | |
344 | len += snprintf(buf + len, buf_len - len, "CCCR_CAPS: 0x%x\n", cccr); | |
345 | ||
346 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_CIS, &ret); | |
347 | if (ret) { | |
348 | IWM_ERR(iwm, "Could not read SDIO_CCCR_CIS\n"); | |
349 | goto err; | |
350 | } | |
351 | len += snprintf(buf + len, buf_len - len, "CCCR_CIS: 0x%x\n", cccr); | |
352 | ||
353 | ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len); | |
354 | err: | |
355 | sdio_release_host(hw->func); | |
356 | ||
357 | kfree(buf); | |
358 | ||
359 | return ret; | |
360 | } | |
361 | ||
362 | static const struct file_operations iwm_debugfs_sdio_fops = { | |
363 | .owner = THIS_MODULE, | |
364 | .open = iwm_debugfs_sdio_open, | |
365 | .read = iwm_debugfs_sdio_read, | |
366 | }; | |
367 | ||
368 | static int if_sdio_debugfs_init(struct iwm_priv *iwm, struct dentry *parent_dir) | |
369 | { | |
370 | int result; | |
371 | struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm); | |
372 | ||
373 | hw->cccr_dentry = debugfs_create_file("cccr", 0200, | |
374 | parent_dir, iwm, | |
375 | &iwm_debugfs_sdio_fops); | |
376 | result = PTR_ERR(hw->cccr_dentry); | |
377 | if (IS_ERR(hw->cccr_dentry) && (result != -ENODEV)) { | |
378 | IWM_ERR(iwm, "Couldn't create CCCR entry: %d\n", result); | |
379 | return result; | |
380 | } | |
381 | ||
382 | return 0; | |
383 | } | |
384 | ||
385 | static void if_sdio_debugfs_exit(struct iwm_priv *iwm) | |
386 | { | |
387 | struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm); | |
388 | ||
389 | debugfs_remove(hw->cccr_dentry); | |
390 | } | |
391 | ||
392 | static struct iwm_if_ops if_sdio_ops = { | |
393 | .enable = if_sdio_enable, | |
394 | .disable = if_sdio_disable, | |
395 | .send_chunk = if_sdio_send_chunk, | |
396 | .debugfs_init = if_sdio_debugfs_init, | |
397 | .debugfs_exit = if_sdio_debugfs_exit, | |
398 | .umac_name = "iwmc3200wifi-umac-sdio.bin", | |
939cab83 | 399 | .calib_lmac_name = "iwmc3200wifi-calib-sdio.bin", |
bb9f8692 ZY |
400 | .lmac_name = "iwmc3200wifi-lmac-sdio.bin", |
401 | }; | |
402 | ||
403 | static int iwm_sdio_probe(struct sdio_func *func, | |
404 | const struct sdio_device_id *id) | |
405 | { | |
406 | struct iwm_priv *iwm; | |
407 | struct iwm_sdio_priv *hw; | |
408 | struct device *dev = &func->dev; | |
409 | int ret; | |
410 | ||
411 | /* check if TOP has already initialized the card */ | |
412 | sdio_claim_host(func); | |
413 | ret = sdio_enable_func(func); | |
414 | if (ret) { | |
415 | dev_err(dev, "wait for TOP to enable the device\n"); | |
416 | sdio_release_host(func); | |
417 | return ret; | |
418 | } | |
419 | ||
420 | ret = sdio_set_block_size(func, IWM_SDIO_BLK_SIZE); | |
421 | ||
422 | sdio_disable_func(func); | |
423 | sdio_release_host(func); | |
424 | ||
425 | if (ret < 0) { | |
426 | dev_err(dev, "Failed to set block size: %d\n", ret); | |
427 | return ret; | |
428 | } | |
429 | ||
430 | iwm = iwm_if_alloc(sizeof(struct iwm_sdio_priv), dev, &if_sdio_ops); | |
431 | if (IS_ERR(iwm)) { | |
432 | dev_err(dev, "allocate SDIO interface failed\n"); | |
433 | return PTR_ERR(iwm); | |
434 | } | |
435 | ||
436 | hw = iwm_private(iwm); | |
437 | hw->iwm = iwm; | |
438 | ||
439 | ret = iwm_debugfs_init(iwm); | |
440 | if (ret < 0) { | |
441 | IWM_ERR(iwm, "Debugfs registration failed\n"); | |
442 | goto if_free; | |
443 | } | |
444 | ||
445 | sdio_set_drvdata(func, hw); | |
446 | ||
447 | hw->func = func; | |
448 | hw->blk_size = IWM_SDIO_BLK_SIZE; | |
449 | ||
450 | hw->isr_wq = create_singlethread_workqueue(KBUILD_MODNAME "_sdio"); | |
451 | if (!hw->isr_wq) { | |
452 | ret = -ENOMEM; | |
453 | goto debugfs_exit; | |
454 | } | |
455 | ||
456 | INIT_WORK(&hw->isr_worker, iwm_sdio_isr_worker); | |
457 | ||
d7e057dc ZY |
458 | ret = iwm_if_add(iwm); |
459 | if (ret) { | |
460 | dev_err(dev, "add SDIO interface failed\n"); | |
461 | goto destroy_wq; | |
462 | } | |
463 | ||
bb9f8692 ZY |
464 | dev_info(dev, "IWM SDIO probe\n"); |
465 | ||
466 | return 0; | |
467 | ||
d7e057dc ZY |
468 | destroy_wq: |
469 | destroy_workqueue(hw->isr_wq); | |
bb9f8692 ZY |
470 | debugfs_exit: |
471 | iwm_debugfs_exit(iwm); | |
472 | if_free: | |
473 | iwm_if_free(iwm); | |
474 | return ret; | |
475 | } | |
476 | ||
477 | static void iwm_sdio_remove(struct sdio_func *func) | |
478 | { | |
479 | struct iwm_sdio_priv *hw = sdio_get_drvdata(func); | |
480 | struct iwm_priv *iwm = hw_to_iwm(hw); | |
481 | struct device *dev = &func->dev; | |
482 | ||
d7e057dc | 483 | iwm_if_remove(iwm); |
bb9f8692 | 484 | destroy_workqueue(hw->isr_wq); |
4e9aa52e ZY |
485 | iwm_debugfs_exit(iwm); |
486 | iwm_if_free(iwm); | |
bb9f8692 ZY |
487 | |
488 | sdio_set_drvdata(func, NULL); | |
489 | ||
490 | dev_info(dev, "IWM SDIO remove\n"); | |
491 | ||
492 | return; | |
493 | } | |
494 | ||
495 | static const struct sdio_device_id iwm_sdio_ids[] = { | |
30315ff0 ZY |
496 | /* Global/AGN SKU */ |
497 | { SDIO_DEVICE(SDIO_VENDOR_ID_INTEL, 0x1403) }, | |
498 | /* BGN SKU */ | |
499 | { SDIO_DEVICE(SDIO_VENDOR_ID_INTEL, 0x1408) }, | |
bb9f8692 ZY |
500 | { /* end: all zeroes */ }, |
501 | }; | |
502 | MODULE_DEVICE_TABLE(sdio, iwm_sdio_ids); | |
503 | ||
504 | static struct sdio_driver iwm_sdio_driver = { | |
505 | .name = "iwm_sdio", | |
506 | .id_table = iwm_sdio_ids, | |
507 | .probe = iwm_sdio_probe, | |
508 | .remove = iwm_sdio_remove, | |
509 | }; | |
510 | ||
511 | static int __init iwm_sdio_init_module(void) | |
512 | { | |
257862f3 | 513 | return sdio_register_driver(&iwm_sdio_driver); |
bb9f8692 ZY |
514 | } |
515 | ||
516 | static void __exit iwm_sdio_exit_module(void) | |
517 | { | |
518 | sdio_unregister_driver(&iwm_sdio_driver); | |
519 | } | |
520 | ||
521 | module_init(iwm_sdio_init_module); | |
522 | module_exit(iwm_sdio_exit_module); | |
523 | ||
524 | MODULE_LICENSE("GPL"); | |
525 | MODULE_AUTHOR(IWM_COPYRIGHT " " IWM_AUTHOR); |