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/sched/signal.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 */
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 provide its pid to driver.
73 */
74 if (padapter->pid == 0)
75 return;
76 kill_pid(find_vpid(padapter->pid), SIGUSR1, 1);
77 }
78 }
79
80 /* query rx phy status from fw.
81 * Adhoc mode: beacon.
82 * Infrastructure mode: beacon , data.
83 */
query_fw_rx_phy_status(struct _adapter * padapter)84 static void query_fw_rx_phy_status(struct _adapter *padapter)
85 {
86 u32 val32 = 0;
87 int pollingcnts = 50;
88
89 if (check_fwstate(&padapter->mlmepriv, _FW_LINKED)) {
90 r8712_write32(padapter, IOCMD_CTRL_REG, 0xf4000001);
91 msleep(100);
92 /* Wait FW complete IO Cmd */
93 while ((r8712_read32(padapter, IOCMD_CTRL_REG)) &&
94 (pollingcnts > 0)) {
95 pollingcnts--;
96 msleep(20);
97 }
98 if (pollingcnts != 0)
99 val32 = r8712_read32(padapter, IOCMD_DATA_REG);
100 else /* time out */
101 val32 = 0;
102 val32 >>= 4;
103 padapter->recvpriv.fw_rssi =
104 (u8)r8712_signal_scale_mapping(val32);
105 }
106 }
107
108 /* check mlme, hw, phy, or dynamic algorithm status. */
StatusWatchdogCallback(struct _adapter * padapter)109 static void StatusWatchdogCallback(struct _adapter *padapter)
110 {
111 check_hw_pbc(padapter);
112 query_fw_rx_phy_status(padapter);
113 }
114
r871x_internal_cmd_hdl(struct _adapter * padapter,u8 * pbuf)115 static void r871x_internal_cmd_hdl(struct _adapter *padapter, u8 *pbuf)
116 {
117 struct drvint_cmd_parm *pdrvcmd;
118
119 if (!pbuf)
120 return;
121 pdrvcmd = (struct drvint_cmd_parm *)pbuf;
122 switch (pdrvcmd->i_cid) {
123 case WDG_WK_CID:
124 StatusWatchdogCallback(padapter);
125 break;
126 default:
127 break;
128 }
129 kfree(pdrvcmd->pbuf);
130 }
131
read_macreg_hdl(struct _adapter * padapter,u8 * pbuf)132 static u8 read_macreg_hdl(struct _adapter *padapter, u8 *pbuf)
133 {
134 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
135 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
136
137 /* invoke cmd->callback function */
138 pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
139 if (!pcmd_callback)
140 r8712_free_cmd_obj(pcmd);
141 else
142 pcmd_callback(padapter, pcmd);
143 return H2C_SUCCESS;
144 }
145
write_macreg_hdl(struct _adapter * padapter,u8 * pbuf)146 static u8 write_macreg_hdl(struct _adapter *padapter, u8 *pbuf)
147 {
148 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
149 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
150
151 /* invoke cmd->callback function */
152 pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
153 if (!pcmd_callback)
154 r8712_free_cmd_obj(pcmd);
155 else
156 pcmd_callback(padapter, pcmd);
157 return H2C_SUCCESS;
158 }
159
read_bbreg_hdl(struct _adapter * padapter,u8 * pbuf)160 static u8 read_bbreg_hdl(struct _adapter *padapter, u8 *pbuf)
161 {
162 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
163
164 r8712_free_cmd_obj(pcmd);
165 return H2C_SUCCESS;
166 }
167
write_bbreg_hdl(struct _adapter * padapter,u8 * pbuf)168 static u8 write_bbreg_hdl(struct _adapter *padapter, u8 *pbuf)
169 {
170 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
171 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
172
173 pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
174 if (!pcmd_callback)
175 r8712_free_cmd_obj(pcmd);
176 else
177 pcmd_callback(padapter, pcmd);
178 return H2C_SUCCESS;
179 }
180
read_rfreg_hdl(struct _adapter * padapter,u8 * pbuf)181 static u8 read_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
182 {
183 u32 val;
184 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
185 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
186
187 if (pcmd->rsp && pcmd->rspsz > 0)
188 memcpy(pcmd->rsp, (u8 *)&val, pcmd->rspsz);
189 pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
190 if (!pcmd_callback)
191 r8712_free_cmd_obj(pcmd);
192 else
193 pcmd_callback(padapter, pcmd);
194 return H2C_SUCCESS;
195 }
196
write_rfreg_hdl(struct _adapter * padapter,u8 * pbuf)197 static u8 write_rfreg_hdl(struct _adapter *padapter, u8 *pbuf)
198 {
199 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
200 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
201
202 pcmd_callback = cmd_callback[pcmd->cmdcode].callback;
203 if (!pcmd_callback)
204 r8712_free_cmd_obj(pcmd);
205 else
206 pcmd_callback(padapter, pcmd);
207 return H2C_SUCCESS;
208 }
209
sys_suspend_hdl(struct _adapter * padapter,u8 * pbuf)210 static u8 sys_suspend_hdl(struct _adapter *padapter, u8 *pbuf)
211 {
212 struct cmd_obj *pcmd = (struct cmd_obj *)pbuf;
213
214 r8712_free_cmd_obj(pcmd);
215 return H2C_SUCCESS;
216 }
217
cmd_hdl_filter(struct _adapter * padapter,struct cmd_obj * pcmd)218 static struct cmd_obj *cmd_hdl_filter(struct _adapter *padapter,
219 struct cmd_obj *pcmd)
220 {
221 struct cmd_obj *pcmd_r;
222
223 if (!pcmd)
224 return pcmd;
225 pcmd_r = NULL;
226
227 switch (pcmd->cmdcode) {
228 case GEN_CMD_CODE(_Read_MACREG):
229 read_macreg_hdl(padapter, (u8 *)pcmd);
230 pcmd_r = pcmd;
231 break;
232 case GEN_CMD_CODE(_Write_MACREG):
233 write_macreg_hdl(padapter, (u8 *)pcmd);
234 pcmd_r = pcmd;
235 break;
236 case GEN_CMD_CODE(_Read_BBREG):
237 read_bbreg_hdl(padapter, (u8 *)pcmd);
238 break;
239 case GEN_CMD_CODE(_Write_BBREG):
240 write_bbreg_hdl(padapter, (u8 *)pcmd);
241 break;
242 case GEN_CMD_CODE(_Read_RFREG):
243 read_rfreg_hdl(padapter, (u8 *)pcmd);
244 break;
245 case GEN_CMD_CODE(_Write_RFREG):
246 write_rfreg_hdl(padapter, (u8 *)pcmd);
247 break;
248 case GEN_CMD_CODE(_SetUsbSuspend):
249 sys_suspend_hdl(padapter, (u8 *)pcmd);
250 break;
251 case GEN_CMD_CODE(_JoinBss):
252 r8712_joinbss_reset(padapter);
253 /* Before set JoinBss_CMD to FW, driver must ensure FW is in
254 * PS_MODE_ACTIVE. Directly write rpwm to radio on and assign
255 * new pwr_mode to Driver, instead of use workitem to change
256 * state.
257 */
258 if (padapter->pwrctrlpriv.pwr_mode > PS_MODE_ACTIVE) {
259 padapter->pwrctrlpriv.pwr_mode = PS_MODE_ACTIVE;
260 mutex_lock(&padapter->pwrctrlpriv.mutex_lock);
261 r8712_set_rpwm(padapter, PS_STATE_S4);
262 mutex_unlock(&padapter->pwrctrlpriv.mutex_lock);
263 }
264 pcmd_r = pcmd;
265 break;
266 case _DRV_INT_CMD_:
267 r871x_internal_cmd_hdl(padapter, pcmd->parmbuf);
268 r8712_free_cmd_obj(pcmd);
269 pcmd_r = NULL;
270 break;
271 default:
272 pcmd_r = pcmd;
273 break;
274 }
275 return pcmd_r; /* if returning pcmd_r == NULL, pcmd must be free. */
276 }
277
check_cmd_fifo(struct _adapter * padapter,uint sz)278 static u8 check_cmd_fifo(struct _adapter *padapter, uint sz)
279 {
280 return _SUCCESS;
281 }
282
r8712_fw_cmd(struct _adapter * pAdapter,u32 cmd)283 u8 r8712_fw_cmd(struct _adapter *pAdapter, u32 cmd)
284 {
285 int pollingcnts = 50;
286
287 r8712_write32(pAdapter, IOCMD_CTRL_REG, cmd);
288 msleep(100);
289 while ((r8712_read32(pAdapter, IOCMD_CTRL_REG != 0)) &&
290 (pollingcnts > 0)) {
291 pollingcnts--;
292 msleep(20);
293 }
294 if (pollingcnts == 0)
295 return false;
296 return true;
297 }
298
r8712_fw_cmd_data(struct _adapter * pAdapter,u32 * value,u8 flag)299 void r8712_fw_cmd_data(struct _adapter *pAdapter, u32 *value, u8 flag)
300 {
301 if (flag == 0) /* set */
302 r8712_write32(pAdapter, IOCMD_DATA_REG, *value);
303 else /* query */
304 *value = r8712_read32(pAdapter, IOCMD_DATA_REG);
305 }
306
r8712_cmd_thread(void * context)307 int r8712_cmd_thread(void *context)
308 {
309 struct cmd_obj *pcmd;
310 unsigned int cmdsz, wr_sz;
311 __le32 *pcmdbuf;
312 struct tx_desc *pdesc;
313 void (*pcmd_callback)(struct _adapter *dev, struct cmd_obj *pcmd);
314 struct _adapter *padapter = context;
315 struct cmd_priv *pcmdpriv = &(padapter->cmdpriv);
316
317 allow_signal(SIGTERM);
318 while (1) {
319 if (wait_for_completion_interruptible(&pcmdpriv->cmd_queue_comp))
320 break;
321 if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
322 break;
323 if (r8712_register_cmd_alive(padapter) != _SUCCESS)
324 continue;
325 _next:
326 pcmd = r8712_dequeue_cmd(&(pcmdpriv->cmd_queue));
327 if (!(pcmd)) {
328 r8712_unregister_cmd_alive(padapter);
329 continue;
330 }
331 pcmdbuf = (__le32 *)pcmdpriv->cmd_buf;
332 pdesc = (struct tx_desc *)pcmdbuf;
333 memset(pdesc, 0, TXDESC_SIZE);
334 pcmd = cmd_hdl_filter(padapter, pcmd);
335 if (pcmd) { /* if pcmd != NULL, cmd will be handled by f/w */
336 struct dvobj_priv *pdvobj = &padapter->dvobjpriv;
337 u8 blnPending = 0;
338
339 pcmdpriv->cmd_issued_cnt++;
340 cmdsz = round_up(pcmd->cmdsz, 8);
341 wr_sz = TXDESC_SIZE + 8 + cmdsz;
342 pdesc->txdw0 |= cpu_to_le32((wr_sz - TXDESC_SIZE) &
343 0x0000ffff);
344 if (pdvobj->ishighspeed) {
345 if ((wr_sz % 512) == 0)
346 blnPending = 1;
347 } else {
348 if ((wr_sz % 64) == 0)
349 blnPending = 1;
350 }
351 if (blnPending) /* 32 bytes for TX Desc - 8 offset */
352 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
353 OFFSET_SZ + 8) << OFFSET_SHT) &
354 0x00ff0000);
355 else {
356 pdesc->txdw0 |= cpu_to_le32(((TXDESC_SIZE +
357 OFFSET_SZ) <<
358 OFFSET_SHT) &
359 0x00ff0000);
360 }
361 pdesc->txdw0 |= cpu_to_le32(OWN | FSG | LSG);
362 pdesc->txdw1 |= cpu_to_le32((0x13 << QSEL_SHT) &
363 0x00001f00);
364 pcmdbuf += (TXDESC_SIZE >> 2);
365 *pcmdbuf = cpu_to_le32((cmdsz & 0x0000ffff) |
366 (pcmd->cmdcode << 16) |
367 (pcmdpriv->cmd_seq << 24));
368 pcmdbuf += 2; /* 8 bytes alignment */
369 memcpy((u8 *)pcmdbuf, pcmd->parmbuf, pcmd->cmdsz);
370 while (check_cmd_fifo(padapter, wr_sz) == _FAIL) {
371 if (padapter->bDriverStopped ||
372 padapter->bSurpriseRemoved)
373 break;
374 msleep(100);
375 continue;
376 }
377 if (blnPending)
378 wr_sz += 8; /* Append 8 bytes */
379 r8712_write_mem(padapter, RTL8712_DMA_H2CCMD, wr_sz,
380 (u8 *)pdesc);
381 pcmdpriv->cmd_seq++;
382 if (pcmd->cmdcode == GEN_CMD_CODE(_CreateBss)) {
383 pcmd->res = H2C_SUCCESS;
384 pcmd_callback = cmd_callback[pcmd->
385 cmdcode].callback;
386 if (pcmd_callback)
387 pcmd_callback(padapter, pcmd);
388 continue;
389 }
390 if (pcmd->cmdcode == GEN_CMD_CODE(_SetPwrMode)) {
391 if (padapter->pwrctrlpriv.bSleep) {
392 mutex_lock(&padapter->
393 pwrctrlpriv.mutex_lock);
394 r8712_set_rpwm(padapter, PS_STATE_S2);
395 mutex_unlock(&padapter->pwrctrlpriv.mutex_lock);
396 }
397 }
398 r8712_free_cmd_obj(pcmd);
399 if (list_empty(&pcmdpriv->cmd_queue.queue)) {
400 r8712_unregister_cmd_alive(padapter);
401 continue;
402 } else {
403 goto _next;
404 }
405 } else {
406 goto _next;
407 }
408 flush_signals_thread();
409 }
410 /* free all cmd_obj resources */
411 do {
412 pcmd = r8712_dequeue_cmd(&(pcmdpriv->cmd_queue));
413 if (!pcmd)
414 break;
415 r8712_free_cmd_obj(pcmd);
416 } while (1);
417 complete(&pcmdpriv->terminate_cmdthread_comp);
418 thread_exit();
419 }
420
r8712_event_handle(struct _adapter * padapter,__le32 * peventbuf)421 void r8712_event_handle(struct _adapter *padapter, __le32 *peventbuf)
422 {
423 u8 evt_code, evt_seq;
424 u16 evt_sz;
425 void (*event_callback)(struct _adapter *dev, u8 *pbuf);
426 struct evt_priv *pevt_priv = &(padapter->evtpriv);
427
428 if (!peventbuf)
429 goto _abort_event_;
430 evt_sz = (u16)(le32_to_cpu(*peventbuf) & 0xffff);
431 evt_seq = (u8)((le32_to_cpu(*peventbuf) >> 24) & 0x7f);
432 evt_code = (u8)((le32_to_cpu(*peventbuf) >> 16) & 0xff);
433 /* checking event sequence... */
434 if ((evt_seq & 0x7f) != pevt_priv->event_seq) {
435 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
436 goto _abort_event_;
437 }
438 /* checking if event code is valid */
439 if (evt_code >= MAX_C2HEVT) {
440 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
441 goto _abort_event_;
442 } else if ((evt_code == GEN_EVT_CODE(_Survey)) &&
443 (evt_sz > sizeof(struct wlan_bssid_ex))) {
444 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
445 goto _abort_event_;
446 }
447 /* checking if event size match the event parm size */
448 if ((wlanevents[evt_code].parmsize) &&
449 (wlanevents[evt_code].parmsize != evt_sz)) {
450 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
451 goto _abort_event_;
452 } else if ((evt_sz == 0) && (evt_code != GEN_EVT_CODE(_WPS_PBC))) {
453 pevt_priv->event_seq = ((evt_seq + 1) & 0x7f);
454 goto _abort_event_;
455 }
456 pevt_priv->event_seq++; /* update evt_seq */
457 if (pevt_priv->event_seq > 127)
458 pevt_priv->event_seq = 0;
459 /* move to event content, 8 bytes alignment */
460 peventbuf = peventbuf + 2;
461 event_callback = wlanevents[evt_code].event_callback;
462 if (event_callback)
463 event_callback(padapter, (u8 *)peventbuf);
464 pevt_priv->evt_done_cnt++;
465 _abort_event_:
466 return;
467 }
468