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