1 /******************************************************************************
2 * rtl8712_cmd.c
3 *
4 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
5 * Linux device driver for RTL8192SU
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
19 *
20 * Modifications for inclusion into the Linux staging tree are
21 * Copyright(c) 2010 Larry Finger. All rights reserved.
22 *
23 * Contact information:
24 * WLAN FAE <wlanfae@realtek.com>.
25 * Larry Finger <Larry.Finger@lwfinger.net>
26 *
27 ******************************************************************************/
28
29 #define _RTL8712_CMD_C_
30
31 #include <linux/compiler.h>
32 #include <linux/kernel.h>
33 #include <linux/errno.h>
34 #include <linux/init.h>
35 #include <linux/slab.h>
36 #include <linux/module.h>
37 #include <linux/kref.h>
38 #include <linux/netdevice.h>
39 #include <linux/skbuff.h>
40 #include <linux/usb.h>
41 #include <linux/usb/ch9.h>
42 #include <linux/circ_buf.h>
43 #include <linux/uaccess.h>
44 #include <asm/byteorder.h>
45 #include <linux/atomic.h>
46 #include <linux/semaphore.h>
47 #include <linux/rtnetlink.h>
48
49 #include "osdep_service.h"
50 #include "drv_types.h"
51 #include "recv_osdep.h"
52 #include "mlme_osdep.h"
53 #include "rtl871x_byteorder.h"
54 #include "rtl871x_ioctl_set.h"
55
check_hw_pbc(struct _adapter * padapter)56 static void check_hw_pbc(struct _adapter *padapter)
57 {
58 u8 tmp1byte;
59
60 r8712_write8(padapter, MAC_PINMUX_CTRL, (GPIOMUX_EN | GPIOSEL_GPIO));
61 tmp1byte = r8712_read8(padapter, GPIO_IO_SEL);
62 tmp1byte &= ~(HAL_8192S_HW_GPIO_WPS_BIT);
63 r8712_write8(padapter, GPIO_IO_SEL, tmp1byte);
64 tmp1byte = r8712_read8(padapter, GPIO_CTRL);
65 if (tmp1byte == 0xff)
66 return ;
67 if (tmp1byte&HAL_8192S_HW_GPIO_WPS_BIT) {
68 /* Here we only set bPbcPressed to true
69 * After trigger PBC, the variable will be set to false */
70 DBG_8712("CheckPbcGPIO - PBC is pressed !!!!\n");
71 /* 0 is the default value and it means the application monitors
72 * the HW PBC doesn't privde its pid to driver. */
73 if (padapter->pid == 0)
74 return;
75 kill_pid(find_vpid(padapter->pid), SIGUSR1, 1);
76 }
77 }
78
79 /* query rx phy status from fw.
80 * Adhoc mode: beacon.
81 * Infrastructure mode: beacon , data. */
query_fw_rx_phy_status(struct _adapter * padapter)82 static void query_fw_rx_phy_status(struct _adapter *padapter)
83 {
84 u32 val32 = 0;
85 int pollingcnts = 50;
86
87 if (check_fwstate(&padapter->mlmepriv, _FW_LINKED) == true) {
88 r8712_write32(padapter, IOCMD_CTRL_REG, 0xf4000001);
89 msleep(100);
90 /* Wait FW complete IO Cmd */
91 while ((r8712_read32(padapter, IOCMD_CTRL_REG)) &&
92 (pollingcnts > 0)) {
93 pollingcnts--;
94 msleep(20);
95 }
96 if (pollingcnts != 0)
97 val32 = r8712_read32(padapter, IOCMD_DATA_REG);
98 else /* time out */
99 val32 = 0;
100 val32 = val32 >> 4;
101 padapter->recvpriv.fw_rssi =
102 (u8)r8712_signal_scale_mapping(val32);
103 }
104 }
105
106 /* check mlme, hw, phy, or dynamic algorithm status. */
StatusWatchdogCallback(struct _adapter * padapter)107 static void StatusWatchdogCallback(struct _adapter *padapter)
108 {
109 check_hw_pbc(padapter);
110 query_fw_rx_phy_status(padapter);
111 }
112
r871x_internal_cmd_hdl(struct _adapter * padapter,u8 * pbuf)113 static void r871x_internal_cmd_hdl(struct _adapter *padapter, u8 *pbuf)
114 {
115 struct drvint_cmd_parm *pdrvcmd;
116
117 if (!pbuf)
118 return;
119 pdrvcmd = (struct drvint_cmd_parm *)pbuf;
120 switch (pdrvcmd->i_cid) {
121 case WDG_WK_CID:
122 StatusWatchdogCallback(padapter);
123 break;
124 default:
125 break;
126 }
127 kfree(pdrvcmd->pbuf);
128 }
129
read_macreg_hdl(struct _adapter * padapter,u8 * pbuf)130 static u8 read_macreg_hdl(struct _adapter *padapter, u8 *pbuf)
131 {
132 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
133 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
134
135 /* invoke cmd->callback function */
136 pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
137 if (pcmd_callback == NULL)
138 r8712_free_cmd_obj(pcmd);
139 else
140 pcmd_callback(padapter, pcmd);
141 return H2C_SUCCESS;
142 }
143
write_macreg_hdl(struct _adapter * padapter,u8 * pbuf)144 static u8 write_macreg_hdl(struct _adapter *padapter, u8 *pbuf)
145 {
146 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
147 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
148
149 /* invoke cmd->callback function */
150 pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
151 if (pcmd_callback == NULL)
152 r8712_free_cmd_obj(pcmd);
153 else
154 pcmd_callback(padapter, pcmd);
155 return H2C_SUCCESS;
156 }
157
read_bbreg_hdl(struct _adapter * padapter,u8 * pbuf)158 static u8 read_bbreg_hdl(struct _adapter *padapter, u8 *pbuf)
159 {
160 u32 val;
161 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
162 struct readBB_parm *prdbbparm;
163 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
164
165 prdbbparm = (struct readBB_parm *)pcmd->parmbuf;
166 if (pcmd->rsp && pcmd->rspsz > 0)
167 memcpy(pcmd->rsp, (u8 *)&val, pcmd->rspsz);
168 pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
169 if (pcmd_callback == NULL)
170 r8712_free_cmd_obj(pcmd);
171 else
172 pcmd_callback(padapter, pcmd);
173 return H2C_SUCCESS;
174 }
175
write_bbreg_hdl(struct _adapter * padapter,u8 * pbuf)176 static u8 write_bbreg_hdl(struct _adapter *padapter, u8 *pbuf)
177 {
178 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
179 struct writeBB_parm *pwritebbparm;
180 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
181
182 pwritebbparm = (struct writeBB_parm *)pcmd->parmbuf;
183 pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
184 if (pcmd_callback == NULL)
185 r8712_free_cmd_obj(pcmd);
186 else
187 pcmd_callback(padapter, pcmd);
188 return H2C_SUCCESS;
189 }
190
read_rfreg_hdl(struct _adapter * padapter,u8 * pbuf)191 static u8 read_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
192 {
193 u32 val;
194 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
195 struct readRF_parm *prdrfparm;
196 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
197
198 prdrfparm = (struct readRF_parm *)pcmd->parmbuf;
199 if (pcmd->rsp && pcmd->rspsz > 0)
200 memcpy(pcmd->rsp, (u8 *)&val, pcmd->rspsz);
201 pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
202 if (pcmd_callback == NULL)
203 r8712_free_cmd_obj(pcmd);
204 else
205 pcmd_callback(padapter, pcmd);
206 return H2C_SUCCESS;
207 }
208
write_rfreg_hdl(struct _adapter * padapter,u8 * pbuf)209 static u8 write_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
210 {
211 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
212 struct writeRF_parm *pwriterfparm;
213 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
214
215 pwriterfparm = (struct writeRF_parm *)pcmd->parmbuf;
216 pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
217 if (pcmd_callback == NULL)
218 r8712_free_cmd_obj(pcmd);
219 else
220 pcmd_callback(padapter, pcmd);
221 return H2C_SUCCESS;
222 }
223
sys_suspend_hdl(struct _adapter * padapter,u8 * pbuf)224 static u8 sys_suspend_hdl(struct _adapter *padapter, u8 *pbuf)
225 {
226 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
227 struct usb_suspend_parm *psetusbsuspend;
228
229 psetusbsuspend = (struct usb_suspend_parm *)pcmd->parmbuf;
230 r8712_free_cmd_obj(pcmd);
231 return H2C_SUCCESS;
232 }
233
cmd_hdl_filter(struct _adapter * padapter,struct cmd_obj * pcmd)234 static struct cmd_obj *cmd_hdl_filter(struct _adapter *padapter,
235 struct cmd_obj *pcmd)
236 {
237 struct cmd_obj *pcmd_r;
238
239 if (pcmd == NULL)
240 return pcmd;
241 pcmd_r = NULL;
242
243 switch (pcmd->cmdcode) {
244 case GEN_CMD_CODE(_Read_MACREG):
245 read_macreg_hdl(padapter, (u8 *)pcmd);
246 pcmd_r = pcmd;
247 break;
248 case GEN_CMD_CODE(_Write_MACREG):
249 write_macreg_hdl(padapter, (u8 *)pcmd);
250 pcmd_r = pcmd;
251 break;
252 case GEN_CMD_CODE(_Read_BBREG):
253 read_bbreg_hdl(padapter, (u8 *)pcmd);
254 break;
255 case GEN_CMD_CODE(_Write_BBREG):
256 write_bbreg_hdl(padapter, (u8 *)pcmd);
257 break;
258 case GEN_CMD_CODE(_Read_RFREG):
259 read_rfreg_hdl(padapter, (u8 *)pcmd);
260 break;
261 case GEN_CMD_CODE(_Write_RFREG):
262 write_rfreg_hdl(padapter, (u8 *)pcmd);
263 break;
264 case GEN_CMD_CODE(_SetUsbSuspend):
265 sys_suspend_hdl(padapter, (u8 *)pcmd);
266 break;
267 case GEN_CMD_CODE(_JoinBss):
268 r8712_joinbss_reset(padapter);
269 /* Before set JoinBss_CMD to FW, driver must ensure FW is in
270 * PS_MODE_ACTIVE. Directly write rpwm to radio on and assign
271 * new pwr_mode to Driver, instead of use workitem to change
272 * state. */
273 if (padapter->pwrctrlpriv.pwr_mode > PS_MODE_ACTIVE) {
274 padapter->pwrctrlpriv.pwr_mode = PS_MODE_ACTIVE;
275 _enter_pwrlock(&(padapter->pwrctrlpriv.lock));
276 r8712_set_rpwm(padapter, PS_STATE_S4);
277 up(&(padapter->pwrctrlpriv.lock));
278 }
279 pcmd_r = pcmd;
280 break;
281 case _DRV_INT_CMD_:
282 r871x_internal_cmd_hdl(padapter, pcmd->parmbuf);
283 r8712_free_cmd_obj(pcmd);
284 pcmd_r = NULL;
285 break;
286 default:
287 pcmd_r = pcmd;
288 break;
289 }
290 return pcmd_r; /* if returning pcmd_r == NULL, pcmd must be free. */
291 }
292
check_cmd_fifo(struct _adapter * padapter,uint sz)293 static u8 check_cmd_fifo(struct _adapter *padapter, uint sz)
294 {
295 u8 res = _SUCCESS;
296 return res;
297 }
298
r8712_fw_cmd(struct _adapter * pAdapter,u32 cmd)299 u8 r8712_fw_cmd(struct _adapter *pAdapter, u32 cmd)
300 {
301 int pollingcnts = 50;
302
303 r8712_write32(pAdapter, IOCMD_CTRL_REG, cmd);
304 msleep(100);
305 while ((0 != r8712_read32(pAdapter, IOCMD_CTRL_REG)) &&
306 (pollingcnts > 0)) {
307 pollingcnts--;
308 msleep(20);
309 }
310 if (pollingcnts == 0)
311 return false;
312 return true;
313 }
314
r8712_fw_cmd_data(struct _adapter * pAdapter,u32 * value,u8 flag)315 void r8712_fw_cmd_data(struct _adapter *pAdapter, u32 *value, u8 flag)
316 {
317 if (flag == 0) /* set */
318 r8712_write32(pAdapter, IOCMD_DATA_REG, *value);
319 else /* query */
320 *value = r8712_read32(pAdapter, IOCMD_DATA_REG);
321 }
322
r8712_cmd_thread(void * context)323 int r8712_cmd_thread(void *context)
324 {
325 struct cmd_obj *pcmd;
326 unsigned int cmdsz, wr_sz, *pcmdbuf, *prspbuf;
327 struct tx_desc *pdesc;
328 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
329 struct _adapter *padapter = (struct _adapter *)context;
330 struct cmd_priv *pcmdpriv = &(padapter->cmdpriv);
331
332 thread_enter(padapter);
333 while (1) {
334 if ((_down_sema(&(pcmdpriv->cmd_queue_sema))) == _FAIL)
335 break;
336 if ((padapter->bDriverStopped == true) ||
337 (padapter->bSurpriseRemoved == true))
338 break;
339 if (r8712_register_cmd_alive(padapter) != _SUCCESS)
340 continue;
341 _next:
342 pcmd = r8712_dequeue_cmd(&(pcmdpriv->cmd_queue));
343 if (!(pcmd)) {
344 r8712_unregister_cmd_alive(padapter);
345 continue;
346 }
347 pcmdbuf = (unsigned int *)pcmdpriv->cmd_buf;
348 prspbuf = (unsigned int *)pcmdpriv->rsp_buf;
349 pdesc = (struct tx_desc *)pcmdbuf;
350 memset(pdesc, 0, TXDESC_SIZE);
351 pcmd = cmd_hdl_filter(padapter, pcmd);
352 if (pcmd) { /* if pcmd != NULL, cmd will be handled by f/w */
353 struct dvobj_priv *pdvobj = (struct dvobj_priv *)
354 &padapter->dvobjpriv;
355 u8 blnPending = 0;
356 pcmdpriv->cmd_issued_cnt++;
357 cmdsz = _RND8((pcmd->cmdsz)); /* _RND8 */
358 wr_sz = TXDESC_SIZE + 8 + cmdsz;
359 pdesc->txdw0 |= cpu_to_le32((wr_sz-TXDESC_SIZE) &
360 0x0000ffff);
361 if (pdvobj->ishighspeed) {
362 if ((wr_sz % 512) == 0)
363 blnPending = 1;
364 } else {
365 if ((wr_sz % 64) == 0)
366 blnPending = 1;
367 }
368 if (blnPending) /* 32 bytes for TX Desc - 8 offset */
369 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
370 OFFSET_SZ + 8) << OFFSET_SHT) &
371 0x00ff0000);
372 else {
373 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
374 OFFSET_SZ) <<
375 OFFSET_SHT) &
376 0x00ff0000);
377 }
378 pdesc->txdw0 |= cpu_to_le32(OWN | FSG | LSG);
379 pdesc->txdw1 |= cpu_to_le32((0x13 << QSEL_SHT) &
380 0x00001f00);
381 pcmdbuf += (TXDESC_SIZE >> 2);
382 *pcmdbuf = cpu_to_le32((cmdsz & 0x0000ffff) |
383 (pcmd->cmdcode << 16) |
384 (pcmdpriv->cmd_seq << 24));
385 pcmdbuf += 2 ; /* 8 bytes aligment */
386 memcpy((u8 *)pcmdbuf, pcmd->parmbuf, pcmd->cmdsz);
387 while (check_cmd_fifo(padapter, wr_sz) == _FAIL) {
388 if ((padapter->bDriverStopped == true) ||
389 (padapter->bSurpriseRemoved == true))
390 break;
391 msleep(100);
392 continue;
393 }
394 if (blnPending)
395 wr_sz += 8; /* Append 8 bytes */
396 r8712_write_mem(padapter, RTL8712_DMA_H2CCMD, wr_sz,
397 (u8 *)pdesc);
398 pcmdpriv->cmd_seq++;
399 if (pcmd->cmdcode == GEN_CMD_CODE(_CreateBss)) {
400 pcmd->res = H2C_SUCCESS;
401 pcmd_callback = cmd_callback[pcmd->
402 cmdcode].callback;
403 if (pcmd_callback)
404 pcmd_callback(padapter, pcmd);
405 continue;
406 }
407 if (pcmd->cmdcode == GEN_CMD_CODE(_SetPwrMode)) {
408 if (padapter->pwrctrlpriv.bSleep) {
409 _enter_pwrlock(&(padapter->
410 pwrctrlpriv.lock));
411 r8712_set_rpwm(padapter, PS_STATE_S2);
412 up(&padapter->pwrctrlpriv.lock);
413 }
414 }
415 r8712_free_cmd_obj(pcmd);
416 if (_queue_empty(&(pcmdpriv->cmd_queue))) {
417 r8712_unregister_cmd_alive(padapter);
418 continue;
419 } else
420 goto _next;
421 } else
422 goto _next;
423 flush_signals_thread();
424 }
425 /* free all cmd_obj resources */
426 do {
427 pcmd = r8712_dequeue_cmd(&(pcmdpriv->cmd_queue));
428 if (pcmd == NULL)
429 break;
430 r8712_free_cmd_obj(pcmd);
431 } while (1);
432 up(&pcmdpriv->terminate_cmdthread_sema);
433 thread_exit();
434 }
435
r8712_event_handle(struct _adapter * padapter,uint * peventbuf)436 void r8712_event_handle(struct _adapter *padapter, uint *peventbuf)
437 {
438 u8 evt_code, evt_seq;
439 u16 evt_sz;
440 void (*event_callback)(struct _adapter *dev, u8 *pbuf);
441 struct evt_priv *pevt_priv = &(padapter->evtpriv);
442
443 if (peventbuf == NULL)
444 goto _abort_event_;
445 evt_sz = (u16)(le32_to_cpu(*peventbuf) & 0xffff);
446 evt_seq = (u8)((le32_to_cpu(*peventbuf) >> 24) & 0x7f);
447 evt_code = (u8)((le32_to_cpu(*peventbuf) >> 16) & 0xff);
448 /* checking event sequence... */
449 if ((evt_seq & 0x7f) != pevt_priv->event_seq) {
450 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
451 goto _abort_event_;
452 }
453 /* checking if event code is valid */
454 if (evt_code >= MAX_C2HEVT) {
455 pevt_priv->event_seq = ((evt_seq+1) & 0x7f);
456 goto _abort_event_;
457 } else if ((evt_code == GEN_EVT_CODE(_Survey)) &&
458 (evt_sz > sizeof(struct wlan_bssid_ex))) {
459 pevt_priv->event_seq = ((evt_seq+1)&0x7f);
460 goto _abort_event_;
461 }
462 /* checking if event size match the event parm size */
463 if ((wlanevents[evt_code].parmsize) &&
464 (wlanevents[evt_code].parmsize != evt_sz)) {
465 pevt_priv->event_seq = ((evt_seq+1)&0x7f);
466 goto _abort_event_;
467 } else if ((evt_sz == 0) && (evt_code != GEN_EVT_CODE(_WPS_PBC))) {
468 pevt_priv->event_seq = ((evt_seq+1)&0x7f);
469 goto _abort_event_;
470 }
471 pevt_priv->event_seq++; /* update evt_seq */
472 if (pevt_priv->event_seq > 127)
473 pevt_priv->event_seq = 0;
474 peventbuf = peventbuf + 2; /* move to event content, 8 bytes aligment */
475 if (peventbuf) {
476 event_callback = wlanevents[evt_code].event_callback;
477 if (event_callback)
478 event_callback(padapter, (u8 *)peventbuf);
479 }
480 pevt_priv->evt_done_cnt++;
481 _abort_event_:
482 return;
483 }
484