Commit | Line | Data |
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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> | |
5a0e3ad6 | 66 | #include <linux/slab.h> |
bb9f8692 ZY |
67 | #include <linux/netdevice.h> |
68 | #include <linux/debugfs.h> | |
51def0be | 69 | #include <linux/mmc/sdio_ids.h> |
bb9f8692 ZY |
70 | #include <linux/mmc/sdio.h> |
71 | #include <linux/mmc/sdio_func.h> | |
72 | ||
73 | #include "iwm.h" | |
74 | #include "debug.h" | |
75 | #include "bus.h" | |
76 | #include "sdio.h" | |
77 | ||
78 | static void iwm_sdio_isr_worker(struct work_struct *work) | |
79 | { | |
80 | struct iwm_sdio_priv *hw; | |
81 | struct iwm_priv *iwm; | |
82 | struct iwm_rx_info *rx_info; | |
83 | struct sk_buff *skb; | |
84 | u8 *rx_buf; | |
85 | unsigned long rx_size; | |
86 | ||
87 | hw = container_of(work, struct iwm_sdio_priv, isr_worker); | |
88 | iwm = hw_to_iwm(hw); | |
89 | ||
90 | while (!skb_queue_empty(&iwm->rx_list)) { | |
91 | skb = skb_dequeue(&iwm->rx_list); | |
92 | rx_info = skb_to_rx_info(skb); | |
93 | rx_size = rx_info->rx_size; | |
94 | rx_buf = skb->data; | |
95 | ||
96 | IWM_HEXDUMP(iwm, DBG, SDIO, "RX: ", rx_buf, rx_size); | |
97 | if (iwm_rx_handle(iwm, rx_buf, rx_size) < 0) | |
98 | IWM_WARN(iwm, "RX error\n"); | |
99 | ||
100 | kfree_skb(skb); | |
101 | } | |
102 | } | |
103 | ||
104 | static void iwm_sdio_isr(struct sdio_func *func) | |
105 | { | |
106 | struct iwm_priv *iwm; | |
107 | struct iwm_sdio_priv *hw; | |
108 | struct iwm_rx_info *rx_info; | |
109 | struct sk_buff *skb; | |
110 | unsigned long buf_size, read_size; | |
111 | int ret; | |
112 | u8 val; | |
113 | ||
114 | hw = sdio_get_drvdata(func); | |
115 | iwm = hw_to_iwm(hw); | |
116 | ||
117 | buf_size = hw->blk_size; | |
118 | ||
119 | /* We're checking the status */ | |
120 | val = sdio_readb(func, IWM_SDIO_INTR_STATUS_ADDR, &ret); | |
121 | if (val == 0 || ret < 0) { | |
122 | IWM_ERR(iwm, "Wrong INTR_STATUS\n"); | |
123 | return; | |
124 | } | |
125 | ||
126 | /* See if we have free buffers */ | |
127 | if (skb_queue_len(&iwm->rx_list) > IWM_RX_LIST_SIZE) { | |
128 | IWM_ERR(iwm, "No buffer for more Rx frames\n"); | |
129 | return; | |
130 | } | |
131 | ||
132 | /* We first read the transaction size */ | |
133 | read_size = sdio_readb(func, IWM_SDIO_INTR_GET_SIZE_ADDR + 1, &ret); | |
134 | read_size = read_size << 8; | |
135 | ||
136 | if (ret < 0) { | |
137 | IWM_ERR(iwm, "Couldn't read the xfer size\n"); | |
138 | return; | |
139 | } | |
140 | ||
141 | /* We need to clear the INT register */ | |
142 | sdio_writeb(func, 1, IWM_SDIO_INTR_CLEAR_ADDR, &ret); | |
143 | if (ret < 0) { | |
144 | IWM_ERR(iwm, "Couldn't clear the INT register\n"); | |
145 | return; | |
146 | } | |
147 | ||
148 | while (buf_size < read_size) | |
149 | buf_size <<= 1; | |
150 | ||
151 | skb = dev_alloc_skb(buf_size); | |
152 | if (!skb) { | |
153 | IWM_ERR(iwm, "Couldn't alloc RX skb\n"); | |
154 | return; | |
155 | } | |
156 | rx_info = skb_to_rx_info(skb); | |
157 | rx_info->rx_size = read_size; | |
158 | rx_info->rx_buf_size = buf_size; | |
159 | ||
160 | /* Now we can read the actual buffer */ | |
161 | ret = sdio_memcpy_fromio(func, skb_put(skb, read_size), | |
162 | IWM_SDIO_DATA_ADDR, read_size); | |
163 | ||
164 | /* The skb is put on a driver's specific Rx SKB list */ | |
165 | skb_queue_tail(&iwm->rx_list, skb); | |
166 | ||
167 | /* We can now schedule the actual worker */ | |
168 | queue_work(hw->isr_wq, &hw->isr_worker); | |
169 | } | |
170 | ||
171 | static void iwm_sdio_rx_free(struct iwm_sdio_priv *hw) | |
172 | { | |
173 | struct iwm_priv *iwm = hw_to_iwm(hw); | |
174 | ||
175 | flush_workqueue(hw->isr_wq); | |
176 | ||
177 | skb_queue_purge(&iwm->rx_list); | |
178 | } | |
179 | ||
180 | /* Bus ops */ | |
181 | static int if_sdio_enable(struct iwm_priv *iwm) | |
182 | { | |
183 | struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm); | |
184 | int ret; | |
185 | ||
186 | sdio_claim_host(hw->func); | |
187 | ||
188 | ret = sdio_enable_func(hw->func); | |
189 | if (ret) { | |
190 | IWM_ERR(iwm, "Couldn't enable the device: is TOP driver " | |
191 | "loaded and functional?\n"); | |
192 | goto release_host; | |
193 | } | |
194 | ||
195 | iwm_reset(iwm); | |
196 | ||
197 | ret = sdio_claim_irq(hw->func, iwm_sdio_isr); | |
198 | if (ret) { | |
199 | IWM_ERR(iwm, "Failed to claim irq: %d\n", ret); | |
200 | goto release_host; | |
201 | } | |
202 | ||
203 | sdio_writeb(hw->func, 1, IWM_SDIO_INTR_ENABLE_ADDR, &ret); | |
204 | if (ret < 0) { | |
205 | IWM_ERR(iwm, "Couldn't enable INTR: %d\n", ret); | |
206 | goto release_irq; | |
207 | } | |
208 | ||
209 | sdio_release_host(hw->func); | |
210 | ||
211 | IWM_DBG_SDIO(iwm, INFO, "IWM SDIO enable\n"); | |
212 | ||
213 | return 0; | |
214 | ||
215 | release_irq: | |
216 | sdio_release_irq(hw->func); | |
217 | release_host: | |
218 | sdio_release_host(hw->func); | |
219 | ||
220 | return ret; | |
221 | } | |
222 | ||
223 | static int if_sdio_disable(struct iwm_priv *iwm) | |
224 | { | |
225 | struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm); | |
226 | int ret; | |
227 | ||
bb9f8692 ZY |
228 | sdio_claim_host(hw->func); |
229 | sdio_writeb(hw->func, 0, IWM_SDIO_INTR_ENABLE_ADDR, &ret); | |
230 | if (ret < 0) | |
231 | IWM_WARN(iwm, "Couldn't disable INTR: %d\n", ret); | |
232 | ||
233 | sdio_release_irq(hw->func); | |
234 | sdio_disable_func(hw->func); | |
235 | sdio_release_host(hw->func); | |
236 | ||
237 | iwm_sdio_rx_free(hw); | |
238 | ||
f96cca84 SO |
239 | iwm_reset(iwm); |
240 | ||
bb9f8692 ZY |
241 | IWM_DBG_SDIO(iwm, INFO, "IWM SDIO disable\n"); |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | static int if_sdio_send_chunk(struct iwm_priv *iwm, u8 *buf, int count) | |
247 | { | |
248 | struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm); | |
249 | int aligned_count = ALIGN(count, hw->blk_size); | |
250 | int ret; | |
251 | ||
252 | if ((unsigned long)buf & 0x3) { | |
253 | IWM_ERR(iwm, "buf <%p> is not dword aligned\n", buf); | |
254 | /* TODO: Is this a hardware limitation? use get_unligned */ | |
255 | return -EINVAL; | |
256 | } | |
257 | ||
258 | sdio_claim_host(hw->func); | |
259 | ret = sdio_memcpy_toio(hw->func, IWM_SDIO_DATA_ADDR, buf, | |
260 | aligned_count); | |
261 | sdio_release_host(hw->func); | |
262 | ||
263 | return ret; | |
264 | } | |
265 | ||
266 | /* debugfs hooks */ | |
267 | static int iwm_debugfs_sdio_open(struct inode *inode, struct file *filp) | |
268 | { | |
269 | filp->private_data = inode->i_private; | |
270 | return 0; | |
271 | } | |
272 | ||
273 | static ssize_t iwm_debugfs_sdio_read(struct file *filp, char __user *buffer, | |
274 | size_t count, loff_t *ppos) | |
275 | { | |
276 | struct iwm_priv *iwm = filp->private_data; | |
277 | struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm); | |
278 | char *buf; | |
279 | u8 cccr; | |
280 | int buf_len = 4096, ret; | |
281 | size_t len = 0; | |
282 | ||
283 | if (*ppos != 0) | |
284 | return 0; | |
285 | if (count < sizeof(buf)) | |
286 | return -ENOSPC; | |
287 | ||
288 | buf = kzalloc(buf_len, GFP_KERNEL); | |
289 | if (!buf) | |
290 | return -ENOMEM; | |
291 | ||
292 | sdio_claim_host(hw->func); | |
293 | ||
294 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_IOEx, &ret); | |
295 | if (ret) { | |
296 | IWM_ERR(iwm, "Could not read SDIO_CCCR_IOEx\n"); | |
297 | goto err; | |
298 | } | |
299 | len += snprintf(buf + len, buf_len - len, "CCCR_IOEx: 0x%x\n", cccr); | |
300 | ||
301 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_IORx, &ret); | |
302 | if (ret) { | |
303 | IWM_ERR(iwm, "Could not read SDIO_CCCR_IORx\n"); | |
304 | goto err; | |
305 | } | |
306 | len += snprintf(buf + len, buf_len - len, "CCCR_IORx: 0x%x\n", cccr); | |
307 | ||
308 | ||
309 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_IENx, &ret); | |
310 | if (ret) { | |
311 | IWM_ERR(iwm, "Could not read SDIO_CCCR_IENx\n"); | |
312 | goto err; | |
313 | } | |
314 | len += snprintf(buf + len, buf_len - len, "CCCR_IENx: 0x%x\n", cccr); | |
315 | ||
316 | ||
317 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_INTx, &ret); | |
318 | if (ret) { | |
319 | IWM_ERR(iwm, "Could not read SDIO_CCCR_INTx\n"); | |
320 | goto err; | |
321 | } | |
322 | len += snprintf(buf + len, buf_len - len, "CCCR_INTx: 0x%x\n", cccr); | |
323 | ||
324 | ||
325 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_ABORT, &ret); | |
326 | if (ret) { | |
327 | IWM_ERR(iwm, "Could not read SDIO_CCCR_ABORTx\n"); | |
328 | goto err; | |
329 | } | |
330 | len += snprintf(buf + len, buf_len - len, "CCCR_ABORT: 0x%x\n", cccr); | |
331 | ||
332 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_IF, &ret); | |
333 | if (ret) { | |
334 | IWM_ERR(iwm, "Could not read SDIO_CCCR_IF\n"); | |
335 | goto err; | |
336 | } | |
337 | len += snprintf(buf + len, buf_len - len, "CCCR_IF: 0x%x\n", cccr); | |
338 | ||
339 | ||
340 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_CAPS, &ret); | |
341 | if (ret) { | |
342 | IWM_ERR(iwm, "Could not read SDIO_CCCR_CAPS\n"); | |
343 | goto err; | |
344 | } | |
345 | len += snprintf(buf + len, buf_len - len, "CCCR_CAPS: 0x%x\n", cccr); | |
346 | ||
347 | cccr = sdio_f0_readb(hw->func, SDIO_CCCR_CIS, &ret); | |
348 | if (ret) { | |
349 | IWM_ERR(iwm, "Could not read SDIO_CCCR_CIS\n"); | |
350 | goto err; | |
351 | } | |
352 | len += snprintf(buf + len, buf_len - len, "CCCR_CIS: 0x%x\n", cccr); | |
353 | ||
354 | ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len); | |
355 | err: | |
356 | sdio_release_host(hw->func); | |
357 | ||
358 | kfree(buf); | |
359 | ||
360 | return ret; | |
361 | } | |
362 | ||
363 | static const struct file_operations iwm_debugfs_sdio_fops = { | |
364 | .owner = THIS_MODULE, | |
365 | .open = iwm_debugfs_sdio_open, | |
366 | .read = iwm_debugfs_sdio_read, | |
6038f373 | 367 | .llseek = default_llseek, |
bb9f8692 ZY |
368 | }; |
369 | ||
1f55c12c | 370 | static void if_sdio_debugfs_init(struct iwm_priv *iwm, struct dentry *parent_dir) |
bb9f8692 | 371 | { |
bb9f8692 ZY |
372 | struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm); |
373 | ||
374 | hw->cccr_dentry = debugfs_create_file("cccr", 0200, | |
375 | parent_dir, iwm, | |
376 | &iwm_debugfs_sdio_fops); | |
bb9f8692 ZY |
377 | } |
378 | ||
379 | static void if_sdio_debugfs_exit(struct iwm_priv *iwm) | |
380 | { | |
381 | struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm); | |
382 | ||
383 | debugfs_remove(hw->cccr_dentry); | |
384 | } | |
385 | ||
386 | static struct iwm_if_ops if_sdio_ops = { | |
387 | .enable = if_sdio_enable, | |
388 | .disable = if_sdio_disable, | |
389 | .send_chunk = if_sdio_send_chunk, | |
390 | .debugfs_init = if_sdio_debugfs_init, | |
391 | .debugfs_exit = if_sdio_debugfs_exit, | |
392 | .umac_name = "iwmc3200wifi-umac-sdio.bin", | |
939cab83 | 393 | .calib_lmac_name = "iwmc3200wifi-calib-sdio.bin", |
bb9f8692 ZY |
394 | .lmac_name = "iwmc3200wifi-lmac-sdio.bin", |
395 | }; | |
328aca32 BH |
396 | MODULE_FIRMWARE("iwmc3200wifi-umac-sdio.bin"); |
397 | MODULE_FIRMWARE("iwmc3200wifi-calib-sdio.bin"); | |
398 | MODULE_FIRMWARE("iwmc3200wifi-lmac-sdio.bin"); | |
bb9f8692 ZY |
399 | |
400 | static int iwm_sdio_probe(struct sdio_func *func, | |
401 | const struct sdio_device_id *id) | |
402 | { | |
403 | struct iwm_priv *iwm; | |
404 | struct iwm_sdio_priv *hw; | |
405 | struct device *dev = &func->dev; | |
406 | int ret; | |
407 | ||
408 | /* check if TOP has already initialized the card */ | |
409 | sdio_claim_host(func); | |
410 | ret = sdio_enable_func(func); | |
411 | if (ret) { | |
412 | dev_err(dev, "wait for TOP to enable the device\n"); | |
413 | sdio_release_host(func); | |
414 | return ret; | |
415 | } | |
416 | ||
417 | ret = sdio_set_block_size(func, IWM_SDIO_BLK_SIZE); | |
418 | ||
419 | sdio_disable_func(func); | |
420 | sdio_release_host(func); | |
421 | ||
422 | if (ret < 0) { | |
423 | dev_err(dev, "Failed to set block size: %d\n", ret); | |
424 | return ret; | |
425 | } | |
426 | ||
427 | iwm = iwm_if_alloc(sizeof(struct iwm_sdio_priv), dev, &if_sdio_ops); | |
428 | if (IS_ERR(iwm)) { | |
429 | dev_err(dev, "allocate SDIO interface failed\n"); | |
430 | return PTR_ERR(iwm); | |
431 | } | |
432 | ||
433 | hw = iwm_private(iwm); | |
434 | hw->iwm = iwm; | |
435 | ||
1f55c12c | 436 | iwm_debugfs_init(iwm); |
bb9f8692 ZY |
437 | |
438 | sdio_set_drvdata(func, hw); | |
439 | ||
440 | hw->func = func; | |
441 | hw->blk_size = IWM_SDIO_BLK_SIZE; | |
442 | ||
443 | hw->isr_wq = create_singlethread_workqueue(KBUILD_MODNAME "_sdio"); | |
444 | if (!hw->isr_wq) { | |
445 | ret = -ENOMEM; | |
446 | goto debugfs_exit; | |
447 | } | |
448 | ||
449 | INIT_WORK(&hw->isr_worker, iwm_sdio_isr_worker); | |
450 | ||
d7e057dc ZY |
451 | ret = iwm_if_add(iwm); |
452 | if (ret) { | |
453 | dev_err(dev, "add SDIO interface failed\n"); | |
454 | goto destroy_wq; | |
455 | } | |
456 | ||
bb9f8692 ZY |
457 | dev_info(dev, "IWM SDIO probe\n"); |
458 | ||
459 | return 0; | |
460 | ||
d7e057dc ZY |
461 | destroy_wq: |
462 | destroy_workqueue(hw->isr_wq); | |
bb9f8692 ZY |
463 | debugfs_exit: |
464 | iwm_debugfs_exit(iwm); | |
bb9f8692 ZY |
465 | iwm_if_free(iwm); |
466 | return ret; | |
467 | } | |
468 | ||
469 | static void iwm_sdio_remove(struct sdio_func *func) | |
470 | { | |
471 | struct iwm_sdio_priv *hw = sdio_get_drvdata(func); | |
472 | struct iwm_priv *iwm = hw_to_iwm(hw); | |
473 | struct device *dev = &func->dev; | |
474 | ||
d7e057dc | 475 | iwm_if_remove(iwm); |
bb9f8692 | 476 | destroy_workqueue(hw->isr_wq); |
4e9aa52e ZY |
477 | iwm_debugfs_exit(iwm); |
478 | iwm_if_free(iwm); | |
bb9f8692 ZY |
479 | |
480 | sdio_set_drvdata(func, NULL); | |
481 | ||
482 | dev_info(dev, "IWM SDIO remove\n"); | |
bb9f8692 ZY |
483 | } |
484 | ||
485 | static const struct sdio_device_id iwm_sdio_ids[] = { | |
30315ff0 ZY |
486 | /* Global/AGN SKU */ |
487 | { SDIO_DEVICE(SDIO_VENDOR_ID_INTEL, 0x1403) }, | |
488 | /* BGN SKU */ | |
489 | { SDIO_DEVICE(SDIO_VENDOR_ID_INTEL, 0x1408) }, | |
bb9f8692 ZY |
490 | { /* end: all zeroes */ }, |
491 | }; | |
492 | MODULE_DEVICE_TABLE(sdio, iwm_sdio_ids); | |
493 | ||
494 | static struct sdio_driver iwm_sdio_driver = { | |
495 | .name = "iwm_sdio", | |
496 | .id_table = iwm_sdio_ids, | |
497 | .probe = iwm_sdio_probe, | |
498 | .remove = iwm_sdio_remove, | |
499 | }; | |
500 | ||
501 | static int __init iwm_sdio_init_module(void) | |
502 | { | |
257862f3 | 503 | return sdio_register_driver(&iwm_sdio_driver); |
bb9f8692 ZY |
504 | } |
505 | ||
506 | static void __exit iwm_sdio_exit_module(void) | |
507 | { | |
508 | sdio_unregister_driver(&iwm_sdio_driver); | |
509 | } | |
510 | ||
511 | module_init(iwm_sdio_init_module); | |
512 | module_exit(iwm_sdio_exit_module); | |
513 | ||
514 | MODULE_LICENSE("GPL"); | |
515 | MODULE_AUTHOR(IWM_COPYRIGHT " " IWM_AUTHOR); |