summaryrefslogtreecommitdiff
path: root/drivers/staging/vt6655/power.c
blob: 2340d2f0399b20da7db606837e53c64807986c55 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
/*
 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 *
 * File: power.c
 *
 * Purpose: Handles 802.11 power management  functions
 *
 * Author: Lyndon Chen
 *
 * Date: July 17, 2002
 *
 * Functions:
 *      PSvEnablePowerSaving - Enable Power Saving Mode
 *      PSvDiasblePowerSaving - Disable Power Saving Mode
 *      PSbConsiderPowerDown - Decide if we can Power Down
 *      PSvSendPSPOLL - Send PS-POLL packet
 *      PSbSendNullPacket - Send Null packet
 *      PSbIsNextTBTTWakeUp - Decide if we need to wake up at next Beacon
 *
 * Revision History:
 *
 */

#include "ttype.h"
#include "mac.h"
#include "device.h"
#include "wmgr.h"
#include "power.h"
#include "wcmd.h"
#include "rxtx.h"
#include "card.h"

/*---------------------  Static Definitions -------------------------*/

/*---------------------  Static Classes  ----------------------------*/

/*---------------------  Static Variables  --------------------------*/
static int msglevel = MSG_LEVEL_INFO;
/*---------------------  Static Functions  --------------------------*/

/*---------------------  Export Variables  --------------------------*/

/*---------------------  Export Functions  --------------------------*/

/*+
 *
 * Routine Description:
 * Enable hw power saving functions
 *
 * Return Value:
 *    None.
 *
 -*/

void
PSvEnablePowerSaving(
	void *hDeviceContext,
	unsigned short wListenInterval
)
{
	PSDevice        pDevice = (PSDevice)hDeviceContext;
	PSMgmtObject    pMgmt = pDevice->pMgmt;
	unsigned short wAID = pMgmt->wCurrAID | BIT14 | BIT15;

	// set period of power up before TBTT
	VNSvOutPortW(pDevice->PortOffset + MAC_REG_PWBT, C_PWBT);
	if (pDevice->eOPMode != OP_MODE_ADHOC) {
		// set AID
		VNSvOutPortW(pDevice->PortOffset + MAC_REG_AIDATIM, wAID);
	} else {
		// set ATIM Window
		MACvWriteATIMW(pDevice->PortOffset, pMgmt->wCurrATIMWindow);
	}
	// Set AutoSleep
	MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
	// Set HWUTSF
	MACvRegBitsOn(pDevice->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);

	if (wListenInterval >= 2) {
		// clear always listen beacon
		MACvRegBitsOff(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
		//pDevice->wCFG &= ~CFG_ALB;
		// first time set listen next beacon
		MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_LNBCN);
		pMgmt->wCountToWakeUp = wListenInterval;
	} else {
		// always listen beacon
		MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);
		//pDevice->wCFG |= CFG_ALB;
		pMgmt->wCountToWakeUp = 0;
	}

	// enable power saving hw function
	MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_PSEN);
	pDevice->bEnablePSMode = true;

	if (pDevice->eOPMode == OP_MODE_ADHOC) {
//        bMgrPrepareBeaconToSend((void *)pDevice, pMgmt);
	}
	// We don't send null pkt in ad hoc mode since beacon will handle this.
	else if (pDevice->eOPMode == OP_MODE_INFRASTRUCTURE) {
		PSbSendNullPacket(pDevice);
	}
	pDevice->bPWBitOn = true;
	DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "PS:Power Saving Mode Enable... \n");
	return;
}

/*+
 *
 * Routine Description:
 * Disable hw power saving functions
 *
 * Return Value:
 *    None.
 *
 -*/

void
PSvDisablePowerSaving(
	void *hDeviceContext
)
{
	PSDevice        pDevice = (PSDevice)hDeviceContext;
//    PSMgmtObject    pMgmt = pDevice->pMgmt;

	// disable power saving hw function
	MACbPSWakeup(pDevice->PortOffset);
	//clear AutoSleep
	MACvRegBitsOff(pDevice->PortOffset, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
	//clear HWUTSF
	MACvRegBitsOff(pDevice->PortOffset, MAC_REG_TFTCTL, TFTCTL_HWUTSF);
	// set always listen beacon
	MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_ALBCN);

	pDevice->bEnablePSMode = false;

	if (pDevice->eOPMode == OP_MODE_INFRASTRUCTURE) {
		PSbSendNullPacket(pDevice);
	}
	pDevice->bPWBitOn = false;
	return;
}

/*+
 *
 * Routine Description:
 * Consider to power down when no more packets to tx or rx.
 *
 * Return Value:
 *    true, if power down success
 *    false, if fail
 -*/

bool
PSbConsiderPowerDown(
	void *hDeviceContext,
	bool bCheckRxDMA,
	bool bCheckCountToWakeUp
)
{
	PSDevice        pDevice = (PSDevice)hDeviceContext;
	PSMgmtObject    pMgmt = pDevice->pMgmt;
	unsigned int uIdx;

	// check if already in Doze mode
	if (MACbIsRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_PS))
		return true;

	if (pMgmt->eCurrMode != WMAC_MODE_IBSS_STA) {
		// check if in TIM wake period
		if (pMgmt->bInTIMWake)
			return false;
	}

	// check scan state
	if (pDevice->bCmdRunning)
		return false;

	// Force PSEN on
	MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_PSEN);

	// check if all TD are empty,
	for (uIdx = 0; uIdx < TYPE_MAXTD; uIdx++) {
		if (pDevice->iTDUsed[uIdx] != 0)
			return false;
	}

	// check if rx isr is clear
	if (bCheckRxDMA &&
	    ((pDevice->dwIsr & ISR_RXDMA0) != 0) &&
	    ((pDevice->dwIsr & ISR_RXDMA1) != 0)) {
		return false;
	}

	if (pMgmt->eCurrMode != WMAC_MODE_IBSS_STA) {
		if (bCheckCountToWakeUp &&
		    (pMgmt->wCountToWakeUp == 0 || pMgmt->wCountToWakeUp == 1)) {
			return false;
		}
	}

	// no Tx, no Rx isr, now go to Doze
	MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_GO2DOZE);
	DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Go to Doze ZZZZZZZZZZZZZZZ\n");
	return true;
}

/*+
 *
 * Routine Description:
 * Send PS-POLL packet
 *
 * Return Value:
 *    None.
 *
 -*/

void
PSvSendPSPOLL(
	void *hDeviceContext
)
{
	PSDevice            pDevice = (PSDevice)hDeviceContext;
	PSMgmtObject        pMgmt = pDevice->pMgmt;
	PSTxMgmtPacket      pTxPacket = NULL;

	memset(pMgmt->pbyPSPacketPool, 0, sizeof(STxMgmtPacket) + WLAN_HDR_ADDR2_LEN);
	pTxPacket = (PSTxMgmtPacket)pMgmt->pbyPSPacketPool;
	pTxPacket->p80211Header = (PUWLAN_80211HDR)((unsigned char *)pTxPacket + sizeof(STxMgmtPacket));
	pTxPacket->p80211Header->sA2.wFrameCtl = cpu_to_le16(
		(
			WLAN_SET_FC_FTYPE(WLAN_TYPE_CTL) |
			WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_PSPOLL) |
			WLAN_SET_FC_PWRMGT(0)
));
	pTxPacket->p80211Header->sA2.wDurationID = pMgmt->wCurrAID | BIT14 | BIT15;
	memcpy(pTxPacket->p80211Header->sA2.abyAddr1, pMgmt->abyCurrBSSID, WLAN_ADDR_LEN);
	memcpy(pTxPacket->p80211Header->sA2.abyAddr2, pMgmt->abyMACAddr, WLAN_ADDR_LEN);
	pTxPacket->cbMPDULen = WLAN_HDR_ADDR2_LEN;
	pTxPacket->cbPayloadLen = 0;
	// send the frame
	if (csMgmt_xmit(pDevice, pTxPacket) != CMD_STATUS_PENDING) {
		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Send PS-Poll packet failed..\n");
	} else {
//        DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Send PS-Poll packet success..\n");
	};

	return;
}

/*+
 *
 * Routine Description:
 * Send NULL packet to AP for notification power state of STA
 *
 * Return Value:
 *    None.
 *
 -*/
bool
PSbSendNullPacket(
	void *hDeviceContext
)
{
	PSDevice            pDevice = (PSDevice)hDeviceContext;
	PSTxMgmtPacket      pTxPacket = NULL;
	PSMgmtObject        pMgmt = pDevice->pMgmt;
	unsigned int uIdx;

	if (pDevice->bLinkPass == false) {
		return false;
	}
#ifdef TxInSleep
	if ((pDevice->bEnablePSMode == false) &&
	    (pDevice->fTxDataInSleep == false)) {
		return false;
	}
#else
	if (pDevice->bEnablePSMode == false) {
		return false;
	}
#endif
	if (pDevice->bEnablePSMode) {
		for (uIdx = 0; uIdx < TYPE_MAXTD; uIdx++) {
			if (pDevice->iTDUsed[uIdx] != 0)
				return false;
		}
	}

	memset(pMgmt->pbyPSPacketPool, 0, sizeof(STxMgmtPacket) + WLAN_NULLDATA_FR_MAXLEN);
	pTxPacket = (PSTxMgmtPacket)pMgmt->pbyPSPacketPool;
	pTxPacket->p80211Header = (PUWLAN_80211HDR)((unsigned char *)pTxPacket + sizeof(STxMgmtPacket));

	if (pDevice->bEnablePSMode) {
		pTxPacket->p80211Header->sA3.wFrameCtl = cpu_to_le16(
			(
				WLAN_SET_FC_FTYPE(WLAN_TYPE_DATA) |
				WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_NULL) |
				WLAN_SET_FC_PWRMGT(1)
));
	} else {
		pTxPacket->p80211Header->sA3.wFrameCtl = cpu_to_le16(
			(
				WLAN_SET_FC_FTYPE(WLAN_TYPE_DATA) |
				WLAN_SET_FC_FSTYPE(WLAN_FSTYPE_NULL) |
				WLAN_SET_FC_PWRMGT(0)
));
	}

	if (pMgmt->eCurrMode != WMAC_MODE_IBSS_STA) {
		pTxPacket->p80211Header->sA3.wFrameCtl |= cpu_to_le16((unsigned short)WLAN_SET_FC_TODS(1));
	}

	memcpy(pTxPacket->p80211Header->sA3.abyAddr1, pMgmt->abyCurrBSSID, WLAN_ADDR_LEN);
	memcpy(pTxPacket->p80211Header->sA3.abyAddr2, pMgmt->abyMACAddr, WLAN_ADDR_LEN);
	memcpy(pTxPacket->p80211Header->sA3.abyAddr3, pMgmt->abyCurrBSSID, WLAN_BSSID_LEN);
	pTxPacket->cbMPDULen = WLAN_HDR_ADDR3_LEN;
	pTxPacket->cbPayloadLen = 0;
	// send the frame
	if (csMgmt_xmit(pDevice, pTxPacket) != CMD_STATUS_PENDING) {
		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Send Null Packet failed !\n");
		return false;
	} else {
//            DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Send Null Packet success....\n");
	}

	return true;
}

/*+
 *
 * Routine Description:
 * Check if Next TBTT must wake up
 *
 * Return Value:
 *    None.
 *
 -*/

bool
PSbIsNextTBTTWakeUp(
	void *hDeviceContext
)
{
	PSDevice         pDevice = (PSDevice)hDeviceContext;
	PSMgmtObject        pMgmt = pDevice->pMgmt;
	bool bWakeUp = false;

	if (pMgmt->wListenInterval >= 2) {
		if (pMgmt->wCountToWakeUp == 0) {
			pMgmt->wCountToWakeUp = pMgmt->wListenInterval;
		}

		pMgmt->wCountToWakeUp--;

		if (pMgmt->wCountToWakeUp == 1) {
			// Turn on wake up to listen next beacon
			MACvRegBitsOn(pDevice->PortOffset, MAC_REG_PSCTL, PSCTL_LNBCN);
			bWakeUp = true;
		}

	}

	return bWakeUp;
}