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