[deliverable/linux.git] / drivers / net / wireless / ti / wl1251 / event.c

/*
 * This file is part of wl1251
 *
 * Copyright (c) 1998-2007 Texas Instruments Incorporated
 * Copyright (C) 2008 Nokia Corporation
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * 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 St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include "wl1251.h"
#include "reg.h"
#include "io.h"
#include "event.h"
#include "ps.h"

static int wl1251_event_scan_complete(struct wl1251 *wl,
				      struct event_mailbox *mbox)
{
	int ret = 0;

	wl1251_debug(DEBUG_EVENT, "status: 0x%x, channels: %d",
		     mbox->scheduled_scan_status,
		     mbox->scheduled_scan_channels);

	if (wl->scanning) {
		ieee80211_scan_completed(wl->hw, false);
		wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan completed");
		wl->scanning = false;
		if (wl->hw->conf.flags & IEEE80211_CONF_IDLE)
			ret = wl1251_ps_set_mode(wl, STATION_IDLE);
	}

	return ret;
}

#define WL1251_PSM_ENTRY_RETRIES  3
static int wl1251_event_ps_report(struct wl1251 *wl,
				  struct event_mailbox *mbox)
{
	int ret = 0;

	wl1251_debug(DEBUG_EVENT, "ps status: %x", mbox->ps_status);

	switch (mbox->ps_status) {
	case EVENT_ENTER_POWER_SAVE_FAIL:
		wl1251_debug(DEBUG_PSM, "PSM entry failed");

		if (wl->station_mode != STATION_POWER_SAVE_MODE) {
			/* remain in active mode */
			wl->psm_entry_retry = 0;
			break;
		}

		if (wl->psm_entry_retry < WL1251_PSM_ENTRY_RETRIES) {
			wl->psm_entry_retry++;
			ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
		} else {
			wl1251_error("Power save entry failed, giving up");
			wl->psm_entry_retry = 0;
		}
		break;
	case EVENT_ENTER_POWER_SAVE_SUCCESS:
	case EVENT_EXIT_POWER_SAVE_FAIL:
	case EVENT_EXIT_POWER_SAVE_SUCCESS:
	default:
		wl->psm_entry_retry = 0;
		break;
	}

	return 0;
}

static void wl1251_event_mbox_dump(struct event_mailbox *mbox)
{
	wl1251_debug(DEBUG_EVENT, "MBOX DUMP:");
	wl1251_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
	wl1251_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
}

static int wl1251_event_process(struct wl1251 *wl, struct event_mailbox *mbox)
{
	int ret;
	u32 vector;

	wl1251_event_mbox_dump(mbox);

	vector = mbox->events_vector & ~(mbox->events_mask);
	wl1251_debug(DEBUG_EVENT, "vector: 0x%x", vector);

	if (vector & SCAN_COMPLETE_EVENT_ID) {
		ret = wl1251_event_scan_complete(wl, mbox);
		if (ret < 0)
			return ret;
	}

	if (vector & BSS_LOSE_EVENT_ID) {
		wl1251_debug(DEBUG_EVENT, "BSS_LOSE_EVENT");

		if (wl->psm_requested &&
		    wl->station_mode != STATION_ACTIVE_MODE) {
			ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
			if (ret < 0)
				return ret;
		}
	}

	if (vector & PS_REPORT_EVENT_ID) {
		wl1251_debug(DEBUG_EVENT, "PS_REPORT_EVENT");
		ret = wl1251_event_ps_report(wl, mbox);
		if (ret < 0)
			return ret;
	}

	if (vector & SYNCHRONIZATION_TIMEOUT_EVENT_ID) {
		wl1251_debug(DEBUG_EVENT, "SYNCHRONIZATION_TIMEOUT_EVENT");

		/* indicate to the stack, that beacons have been lost */
		if (wl->vif && wl->vif->type == NL80211_IFTYPE_STATION)
			ieee80211_beacon_loss(wl->vif);
	}

	if (vector & REGAINED_BSS_EVENT_ID) {
		if (wl->psm_requested) {
			ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
			if (ret < 0)
				return ret;
		}
	}

	if (wl->vif && wl->rssi_thold) {
		if (vector & ROAMING_TRIGGER_LOW_RSSI_EVENT_ID) {
			wl1251_debug(DEBUG_EVENT,
				     "ROAMING_TRIGGER_LOW_RSSI_EVENT");
			ieee80211_cqm_rssi_notify(wl->vif,
				NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
				GFP_KERNEL);
		}

		if (vector & ROAMING_TRIGGER_REGAINED_RSSI_EVENT_ID) {
			wl1251_debug(DEBUG_EVENT,
				     "ROAMING_TRIGGER_REGAINED_RSSI_EVENT");
			ieee80211_cqm_rssi_notify(wl->vif,
				NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
				GFP_KERNEL);
		}
	}

	return 0;
}

/*
 * Poll the mailbox event field until any of the bits in the mask is set or a
 * timeout occurs (WL1251_EVENT_TIMEOUT in msecs)
 */
int wl1251_event_wait(struct wl1251 *wl, u32 mask, int timeout_ms)
{
	u32 events_vector, event;
	unsigned long timeout;

	timeout = jiffies + msecs_to_jiffies(timeout_ms);

	do {
		if (time_after(jiffies, timeout))
			return -ETIMEDOUT;

		msleep(1);

		/* read from both event fields */
		wl1251_mem_read(wl, wl->mbox_ptr[0], &events_vector,
				sizeof(events_vector));
		event = events_vector & mask;
		wl1251_mem_read(wl, wl->mbox_ptr[1], &events_vector,
				sizeof(events_vector));
		event |= events_vector & mask;
	} while (!event);

	return 0;
}

int wl1251_event_unmask(struct wl1251 *wl)
{
	int ret;

	ret = wl1251_acx_event_mbox_mask(wl, ~(wl->event_mask));
	if (ret < 0)
		return ret;

	return 0;
}

void wl1251_event_mbox_config(struct wl1251 *wl)
{
	wl->mbox_ptr[0] = wl1251_reg_read32(wl, REG_EVENT_MAILBOX_PTR);
	wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);

	wl1251_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
		     wl->mbox_ptr[0], wl->mbox_ptr[1]);
}

int wl1251_event_handle(struct wl1251 *wl, u8 mbox_num)
{
	struct event_mailbox mbox;
	int ret;

	wl1251_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);

	if (mbox_num > 1)
		return -EINVAL;

	/* first we read the mbox descriptor */
	wl1251_mem_read(wl, wl->mbox_ptr[mbox_num], &mbox,
			    sizeof(struct event_mailbox));

	/* process the descriptor */
	ret = wl1251_event_process(wl, &mbox);
	if (ret < 0)
		return ret;

	/* then we let the firmware know it can go on...*/
	wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);

	return 0;
}
Commit	Line	Data
2f01a1f5	1	/*
80301cdc	2	* This file is part of wl1251
2f01a1f5 KV	3	*
	4	* Copyright (c) 1998-2007 Texas Instruments Incorporated
	5	* Copyright (C) 2008 Nokia Corporation
	6	*
2f01a1f5 KV	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License
	9	* version 2 as published by the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	19	* 02110-1301 USA
	20	*
	21	*/
	22
13674118	23	#include "wl1251.h"
9bc6772e KV	24	#include "reg.h"
	25	#include "io.h"
	26	#include "event.h"
	27	#include "ps.h"
2f01a1f5	28
80301cdc	29	static int wl1251_event_scan_complete(struct wl1251 *wl,
2f01a1f5 KV	30	struct event_mailbox *mbox)
2f01a1f5 KV	31	{
f1e3e051 JB	32	int ret = 0;
f1e3e051 JB	33
80301cdc	34	wl1251_debug(DEBUG_EVENT, "status: 0x%x, channels: %d",
2f01a1f5 KV	35	mbox->scheduled_scan_status,
	36	mbox->scheduled_scan_channels);
	37
	38	if (wl->scanning) {
2f01a1f5	39	ieee80211_scan_completed(wl->hw, false);
2789da9e	40	wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan completed");
2f01a1f5	41	wl->scanning = false;
f1e3e051 JB	42	if (wl->hw->conf.flags & IEEE80211_CONF_IDLE)
f1e3e051 JB	43	ret = wl1251_ps_set_mode(wl, STATION_IDLE);
2f01a1f5 KV	44	}
2f01a1f5 KV	45
f1e3e051	46	return ret;
2f01a1f5 KV	47	}
2f01a1f5 KV	48
f7ad1eed DG	49	#define WL1251_PSM_ENTRY_RETRIES 3
	50	static int wl1251_event_ps_report(struct wl1251 *wl,
	51	struct event_mailbox *mbox)
	52	{
	53	int ret = 0;
	54
	55	wl1251_debug(DEBUG_EVENT, "ps status: %x", mbox->ps_status);
	56
	57	switch (mbox->ps_status) {
	58	case EVENT_ENTER_POWER_SAVE_FAIL:
	59	wl1251_debug(DEBUG_PSM, "PSM entry failed");
	60
	61	if (wl->station_mode != STATION_POWER_SAVE_MODE) {
	62	/* remain in active mode */
	63	wl->psm_entry_retry = 0;
	64	break;
	65	}
	66
	67	if (wl->psm_entry_retry < WL1251_PSM_ENTRY_RETRIES) {
	68	wl->psm_entry_retry++;
	69	ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
	70	} else {
	71	wl1251_error("Power save entry failed, giving up");
	72	wl->psm_entry_retry = 0;
	73	}
	74	break;
	75	case EVENT_ENTER_POWER_SAVE_SUCCESS:
	76	case EVENT_EXIT_POWER_SAVE_FAIL:
	77	case EVENT_EXIT_POWER_SAVE_SUCCESS:
	78	default:
	79	wl->psm_entry_retry = 0;
	80	break;
	81	}
	82
	83	return 0;
	84	}
	85
80301cdc	86	static void wl1251_event_mbox_dump(struct event_mailbox *mbox)
2f01a1f5	87	{
80301cdc KV	88	wl1251_debug(DEBUG_EVENT, "MBOX DUMP:");
	89	wl1251_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
	90	wl1251_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
2f01a1f5 KV	91	}
2f01a1f5 KV	92
80301cdc	93	static int wl1251_event_process(struct wl1251 wl, struct event_mailbox mbox)
2f01a1f5 KV	94	{
	95	int ret;
	96	u32 vector;
	97
80301cdc	98	wl1251_event_mbox_dump(mbox);
2f01a1f5 KV	99
2f01a1f5 KV	100	vector = mbox->events_vector & ~(mbox->events_mask);
80301cdc	101	wl1251_debug(DEBUG_EVENT, "vector: 0x%x", vector);
2f01a1f5 KV	102
2f01a1f5 KV	103	if (vector & SCAN_COMPLETE_EVENT_ID) {
80301cdc	104	ret = wl1251_event_scan_complete(wl, mbox);
2f01a1f5 KV	105	if (ret < 0)
	106	return ret;
	107	}
	108
	109	if (vector & BSS_LOSE_EVENT_ID) {
80301cdc	110	wl1251_debug(DEBUG_EVENT, "BSS_LOSE_EVENT");
2f01a1f5	111
a0bbb58b JN	112	if (wl->psm_requested &&
a0bbb58b JN	113	wl->station_mode != STATION_ACTIVE_MODE) {
80301cdc	114	ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
2f01a1f5 KV	115	if (ret < 0)
	116	return ret;
	117	}
	118	}
	119
f7ad1eed DG	120	if (vector & PS_REPORT_EVENT_ID) {
	121	wl1251_debug(DEBUG_EVENT, "PS_REPORT_EVENT");
	122	ret = wl1251_event_ps_report(wl, mbox);
	123	if (ret < 0)
	124	return ret;
	125	}
	126
e5b02f64	127	if (vector & SYNCHRONIZATION_TIMEOUT_EVENT_ID) {
287f6f96 JO	128	wl1251_debug(DEBUG_EVENT, "SYNCHRONIZATION_TIMEOUT_EVENT");
	129
	130	/* indicate to the stack, that beacons have been lost */
e5b02f64 GI	131	if (wl->vif && wl->vif->type == NL80211_IFTYPE_STATION)
e5b02f64 GI	132	ieee80211_beacon_loss(wl->vif);
287f6f96 JO	133	}
287f6f96 JO	134
33d51fac VG	135	if (vector & REGAINED_BSS_EVENT_ID) {
	136	if (wl->psm_requested) {
	137	ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
	138	if (ret < 0)
	139	return ret;
	140	}
	141	}
	142
8964e492 DG	143	if (wl->vif && wl->rssi_thold) {
	144	if (vector & ROAMING_TRIGGER_LOW_RSSI_EVENT_ID) {
	145	wl1251_debug(DEBUG_EVENT,
	146	"ROAMING_TRIGGER_LOW_RSSI_EVENT");
	147	ieee80211_cqm_rssi_notify(wl->vif,
	148	NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
	149	GFP_KERNEL);
	150	}
	151
	152	if (vector & ROAMING_TRIGGER_REGAINED_RSSI_EVENT_ID) {
	153	wl1251_debug(DEBUG_EVENT,
	154	"ROAMING_TRIGGER_REGAINED_RSSI_EVENT");
	155	ieee80211_cqm_rssi_notify(wl->vif,
	156	NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
	157	GFP_KERNEL);
	158	}
	159	}
	160
2f01a1f5 KV	161	return 0;
	162	}
	163
7273b970 GI	164	/*
	165	* Poll the mailbox event field until any of the bits in the mask is set or a
	166	* timeout occurs (WL1251_EVENT_TIMEOUT in msecs)
	167	*/
	168	int wl1251_event_wait(struct wl1251 *wl, u32 mask, int timeout_ms)
	169	{
	170	u32 events_vector, event;
	171	unsigned long timeout;
	172
	173	timeout = jiffies + msecs_to_jiffies(timeout_ms);
	174
	175	do {
	176	if (time_after(jiffies, timeout))
	177	return -ETIMEDOUT;
	178
	179	msleep(1);
	180
	181	/* read from both event fields */
	182	wl1251_mem_read(wl, wl->mbox_ptr[0], &events_vector,
	183	sizeof(events_vector));
	184	event = events_vector & mask;
	185	wl1251_mem_read(wl, wl->mbox_ptr[1], &events_vector,
	186	sizeof(events_vector));
	187	event \|= events_vector & mask;
	188	} while (!event);
	189
	190	return 0;
	191	}
	192
80301cdc	193	int wl1251_event_unmask(struct wl1251 *wl)
2f01a1f5 KV	194	{
	195	int ret;
	196
80301cdc	197	ret = wl1251_acx_event_mbox_mask(wl, ~(wl->event_mask));
2f01a1f5 KV	198	if (ret < 0)
	199	return ret;
	200
	201	return 0;
	202	}
	203
80301cdc	204	void wl1251_event_mbox_config(struct wl1251 *wl)
2f01a1f5	205	{
80301cdc	206	wl->mbox_ptr[0] = wl1251_reg_read32(wl, REG_EVENT_MAILBOX_PTR);
2f01a1f5 KV	207	wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);
2f01a1f5 KV	208
80301cdc	209	wl1251_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
2f01a1f5 KV	210	wl->mbox_ptr[0], wl->mbox_ptr[1]);
	211	}
	212
80301cdc	213	int wl1251_event_handle(struct wl1251 *wl, u8 mbox_num)
2f01a1f5 KV	214	{
	215	struct event_mailbox mbox;
	216	int ret;
	217
80301cdc	218	wl1251_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
2f01a1f5 KV	219
	220	if (mbox_num > 1)
	221	return -EINVAL;
	222
	223	/* first we read the mbox descriptor */
0764de64	224	wl1251_mem_read(wl, wl->mbox_ptr[mbox_num], &mbox,
2f01a1f5 KV	225	sizeof(struct event_mailbox));
	226
	227	/* process the descriptor */
80301cdc	228	ret = wl1251_event_process(wl, &mbox);
2f01a1f5 KV	229	if (ret < 0)
	230	return ret;
	231
	232	/* then we let the firmware know it can go on...*/
80301cdc	233	wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);
2f01a1f5 KV	234
	235	return 0;
	236	}