[linux-2.6-block.git] / drivers / staging / rtl8712 / rtl871x_pwrctrl.c

/******************************************************************************
 * rtl871x_pwrctrl.c
 *
 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
 * Linux device driver for RTL8192SU
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License 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 Street, Fifth Floor, Boston, MA 02110, USA
 *
 * Modifications for inclusion into the Linux staging tree are
 * Copyright(c) 2010 Larry Finger. All rights reserved.
 *
 * Contact information:
 * WLAN FAE <wlanfae@realtek.com>
 * Larry Finger <Larry.Finger@lwfinger.net>
 *
 ******************************************************************************/

#define _RTL871X_PWRCTRL_C_

#include "osdep_service.h"
#include "drv_types.h"
#include "osdep_intf.h"

#define RTL8712_SDIO_LOCAL_BASE 0X10100000
#define SDIO_HCPWM (RTL8712_SDIO_LOCAL_BASE + 0x0081)

void r8712_set_rpwm(struct _adapter *padapter, u8 val8)
{
	u8	rpwm;
	struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;

	if (pwrpriv->rpwm == val8) {
		if (pwrpriv->rpwm_retry == 0)
			return;
	}
	if ((padapter->bDriverStopped == true) ||
	    (padapter->bSurpriseRemoved == true))
		return;
	rpwm = val8 | pwrpriv->tog;
	switch (val8) {
	case PS_STATE_S1:
		pwrpriv->cpwm = val8;
		break;
	case PS_STATE_S2:/* only for USB normal powersave mode use,
			  * temp mark some code. */
	case PS_STATE_S3:
	case PS_STATE_S4:
		pwrpriv->cpwm = val8;
		break;
	default:
		break;
	}
	pwrpriv->rpwm_retry = 0;
	pwrpriv->rpwm = val8;
	r8712_write8(padapter, 0x1025FE58, rpwm);
	pwrpriv->tog += 0x80;
}

void r8712_set_ps_mode(struct _adapter *padapter, uint ps_mode, uint smart_ps)
{
	struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;

	if (ps_mode > PM_Card_Disable)
		return;
	/* if driver is in active state, we dont need set smart_ps.*/
	if (ps_mode == PS_MODE_ACTIVE)
		smart_ps = 0;
	if ((pwrpriv->pwr_mode != ps_mode) || (pwrpriv->smart_ps != smart_ps)) {
		if (pwrpriv->pwr_mode == PS_MODE_ACTIVE)
			pwrpriv->bSleep = true;
		else
			pwrpriv->bSleep = false;
		pwrpriv->pwr_mode = ps_mode;
		pwrpriv->smart_ps = smart_ps;
		_set_workitem(&(pwrpriv->SetPSModeWorkItem));
	}
}

/*
 * Caller:ISR handler...
 *
 * This will be called when CPWM interrupt is up.
 *
 * using to update cpwn of drv; and drv will make a decision to up or
 * down pwr level
 */
void r8712_cpwm_int_hdl(struct _adapter *padapter,
			struct reportpwrstate_parm *preportpwrstate)
{
	struct pwrctrl_priv *pwrpriv = &(padapter->pwrctrlpriv);
	struct cmd_priv	*pcmdpriv = &(padapter->cmdpriv);

	if (pwrpriv->cpwm_tog == ((preportpwrstate->state) & 0x80))
		return;
	_cancel_timer_ex(&padapter->pwrctrlpriv. rpwm_check_timer);
	_enter_pwrlock(&pwrpriv->lock);
	pwrpriv->cpwm = (preportpwrstate->state) & 0xf;
	if (pwrpriv->cpwm >= PS_STATE_S2) {
		if (pwrpriv->alives & CMD_ALIVE)
			up(&(pcmdpriv->cmd_queue_sema));
	}
	pwrpriv->cpwm_tog = (preportpwrstate->state) & 0x80;
	up(&pwrpriv->lock);
}

static inline void register_task_alive(struct pwrctrl_priv *pwrctrl, uint tag)
{
		pwrctrl->alives |= tag;
}

static inline void unregister_task_alive(struct pwrctrl_priv *pwrctrl, uint tag)
{
	if (pwrctrl->alives & tag)
		pwrctrl->alives ^= tag;
}

static void _rpwm_check_handler (struct _adapter *padapter)
{
	struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;

	if (padapter->bDriverStopped == true ||
	    padapter->bSurpriseRemoved == true)
		return;
	if (pwrpriv->cpwm != pwrpriv->rpwm)
		_set_workitem(&(pwrpriv->rpwm_workitem));
}

static void SetPSModeWorkItemCallback(struct work_struct *work)
{
	struct pwrctrl_priv *pwrpriv = container_of(work,
				       struct pwrctrl_priv, SetPSModeWorkItem);
	struct _adapter *padapter = container_of(pwrpriv,
				    struct _adapter, pwrctrlpriv);
	if (!pwrpriv->bSleep) {
		_enter_pwrlock(&pwrpriv->lock);
		if (pwrpriv->pwr_mode == PS_MODE_ACTIVE)
			r8712_set_rpwm(padapter, PS_STATE_S4);
		up(&pwrpriv->lock);
	}
}

static void rpwm_workitem_callback(struct work_struct *work)
{
	struct pwrctrl_priv *pwrpriv = container_of(work,
				       struct pwrctrl_priv, rpwm_workitem);
	struct _adapter *padapter = container_of(pwrpriv,
				    struct _adapter, pwrctrlpriv);
	u8 cpwm = pwrpriv->cpwm;
	if (pwrpriv->cpwm != pwrpriv->rpwm) {
		_enter_pwrlock(&pwrpriv->lock);
		cpwm = r8712_read8(padapter, SDIO_HCPWM);
		pwrpriv->rpwm_retry = 1;
		r8712_set_rpwm(padapter, pwrpriv->rpwm);
		up(&pwrpriv->lock);
	}
}

static void rpwm_check_handler (void *FunctionContext)
{
	struct _adapter *adapter = (struct _adapter *)FunctionContext;
	_rpwm_check_handler(adapter);
}

void r8712_init_pwrctrl_priv(struct _adapter *padapter)
{
	struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv;

	memset((unsigned char *)pwrctrlpriv, 0, sizeof(struct pwrctrl_priv));
	sema_init(&pwrctrlpriv->lock, 1);
	pwrctrlpriv->cpwm = PS_STATE_S4;
	pwrctrlpriv->pwr_mode = PS_MODE_ACTIVE;
	pwrctrlpriv->smart_ps = 0;
	pwrctrlpriv->tog = 0x80;
/* clear RPWM to ensure driver and fw back to initial state. */
	r8712_write8(padapter, 0x1025FE58, 0);
	_init_workitem(&(pwrctrlpriv->SetPSModeWorkItem),
		       SetPSModeWorkItemCallback, padapter);
	_init_workitem(&(pwrctrlpriv->rpwm_workitem),
		       rpwm_workitem_callback, padapter);
	_init_timer(&(pwrctrlpriv->rpwm_check_timer),
		    padapter->pnetdev, rpwm_check_handler, (u8 *)padapter);
}

/*
Caller: r8712_cmd_thread

Check if the fw_pwrstate is okay for issuing cmd.
If not (cpwm should be is less than P2 state), then the sub-routine
will raise the cpwm to be greater than or equal to P2.

Calling Context: Passive

Return Value:

_SUCCESS: r8712_cmd_thread can issue cmds to firmware afterwards.
_FAIL: r8712_cmd_thread can not do anything.
*/
sint r8712_register_cmd_alive(struct _adapter *padapter)
{
	uint res = _SUCCESS;
	struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv;

	_enter_pwrlock(&pwrctrl->lock);
	register_task_alive(pwrctrl, CMD_ALIVE);
	if (pwrctrl->cpwm < PS_STATE_S2) {
		r8712_set_rpwm(padapter, PS_STATE_S3);
		res = _FAIL;
	}
	up(&pwrctrl->lock);
	return res;
}

/*
Caller: ISR

If ISR's txdone,
No more pkts for TX,
Then driver shall call this fun. to power down firmware again.
*/

void r8712_unregister_cmd_alive(struct _adapter *padapter)
{
	struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv;

	_enter_pwrlock(&pwrctrl->lock);
	unregister_task_alive(pwrctrl, CMD_ALIVE);
	if ((pwrctrl->cpwm > PS_STATE_S2) &&
	   (pwrctrl->pwr_mode > PS_MODE_ACTIVE)) {
		if ((pwrctrl->alives == 0) &&
		    (check_fwstate(&padapter->mlmepriv,
		     _FW_UNDER_LINKING) != true)) {
			r8712_set_rpwm(padapter, PS_STATE_S0);
		}
	}
	up(&pwrctrl->lock);
}
Commit	Line	Data
2865d42c LF	1	/******************************************************************************
	2	* rtl871x_pwrctrl.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 _RTL871X_PWRCTRL_C_
	30
	31	#include "osdep_service.h"
	32	#include "drv_types.h"
	33	#include "osdep_intf.h"
	34
	35	#define RTL8712_SDIO_LOCAL_BASE 0X10100000
	36	#define SDIO_HCPWM (RTL8712_SDIO_LOCAL_BASE + 0x0081)
	37
	38	void r8712_set_rpwm(struct _adapter *padapter, u8 val8)
	39	{
	40	u8 rpwm;
	41	struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
	42
	43	if (pwrpriv->rpwm == val8) {
	44	if (pwrpriv->rpwm_retry == 0)
	45	return;
	46	}
	47	if ((padapter->bDriverStopped == true) \|\|
	48	(padapter->bSurpriseRemoved == true))
	49	return;
	50	rpwm = val8 \| pwrpriv->tog;
	51	switch (val8) {
	52	case PS_STATE_S1:
	53	pwrpriv->cpwm = val8;
	54	break;
	55	case PS_STATE_S2:/* only for USB normal powersave mode use,
	56	* temp mark some code. */
	57	case PS_STATE_S3:
	58	case PS_STATE_S4:
	59	pwrpriv->cpwm = val8;
	60	break;
	61	default:
	62	break;
	63	}
	64	pwrpriv->rpwm_retry = 0;
65	pwrpriv->rpwm = val8;
66	r8712_write8(padapter, 0x1025FE58, rpwm);
67	pwrpriv->tog += 0x80;
68	}
69
70	void r8712_set_ps_mode(struct _adapter *padapter, uint ps_mode, uint smart_ps)
71	{
72	struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
73
74	if (ps_mode > PM_Card_Disable)
75	return;
76	/* if driver is in active state, we dont need set smart_ps.*/
77	if (ps_mode == PS_MODE_ACTIVE)
78	smart_ps = 0;
79	if ((pwrpriv->pwr_mode != ps_mode) \|\| (pwrpriv->smart_ps != smart_ps)) {
80	if (pwrpriv->pwr_mode == PS_MODE_ACTIVE)
81	pwrpriv->bSleep = true;
82	else
83	pwrpriv->bSleep = false;
84	pwrpriv->pwr_mode = ps_mode;
85	pwrpriv->smart_ps = smart_ps;
86	_set_workitem(&(pwrpriv->SetPSModeWorkItem));
87	}
88	}
89
90	/*
91	* Caller:ISR handler...
92	*
93	* This will be called when CPWM interrupt is up.
94	*
3cbeb42e	95	* using to update cpwn of drv; and drv will make a decision to up or
2865d42c LF	96	* down pwr level
	97	*/
	98	void r8712_cpwm_int_hdl(struct _adapter *padapter,
	99	struct reportpwrstate_parm *preportpwrstate)
	100	{
	101	struct pwrctrl_priv *pwrpriv = &(padapter->pwrctrlpriv);
	102	struct cmd_priv *pcmdpriv = &(padapter->cmdpriv);
2865d42c LF	103
	104	if (pwrpriv->cpwm_tog == ((preportpwrstate->state) & 0x80))
	105	return;
	106	_cancel_timer_ex(&padapter->pwrctrlpriv. rpwm_check_timer);
	107	_enter_pwrlock(&pwrpriv->lock);
	108	pwrpriv->cpwm = (preportpwrstate->state) & 0xf;
	109	if (pwrpriv->cpwm >= PS_STATE_S2) {
	110	if (pwrpriv->alives & CMD_ALIVE)
	111	up(&(pcmdpriv->cmd_queue_sema));
2865d42c LF	112	}
	113	pwrpriv->cpwm_tog = (preportpwrstate->state) & 0x80;
	114	up(&pwrpriv->lock);
	115	}
	116
	117	static inline void register_task_alive(struct pwrctrl_priv *pwrctrl, uint tag)
	118	{
	119	pwrctrl->alives \|= tag;
	120	}
	121
	122	static inline void unregister_task_alive(struct pwrctrl_priv *pwrctrl, uint tag)
	123	{
	124	if (pwrctrl->alives & tag)
	125	pwrctrl->alives ^= tag;
	126	}
	127
	128	static void _rpwm_check_handler (struct _adapter *padapter)
	129	{
	130	struct pwrctrl_priv *pwrpriv = &padapter->pwrctrlpriv;
	131
	132	if (padapter->bDriverStopped == true \|\|
	133	padapter->bSurpriseRemoved == true)
	134	return;
	135	if (pwrpriv->cpwm != pwrpriv->rpwm)
	136	_set_workitem(&(pwrpriv->rpwm_workitem));
	137	}
	138
	139	static void SetPSModeWorkItemCallback(struct work_struct *work)
	140	{
	141	struct pwrctrl_priv *pwrpriv = container_of(work,
	142	struct pwrctrl_priv, SetPSModeWorkItem);
	143	struct _adapter *padapter = container_of(pwrpriv,
	144	struct _adapter, pwrctrlpriv);
2865d42c	145	if (!pwrpriv->bSleep) {
86587b67	146	_enter_pwrlock(&pwrpriv->lock);
2865d42c LF	147	if (pwrpriv->pwr_mode == PS_MODE_ACTIVE)
2865d42c LF	148	r8712_set_rpwm(padapter, PS_STATE_S4);
86587b67	149	up(&pwrpriv->lock);
2865d42c	150	}
2865d42c LF	151	}
	152
	153	static void rpwm_workitem_callback(struct work_struct *work)
	154	{
	155	struct pwrctrl_priv *pwrpriv = container_of(work,
	156	struct pwrctrl_priv, rpwm_workitem);
	157	struct _adapter *padapter = container_of(pwrpriv,
	158	struct _adapter, pwrctrlpriv);
	159	u8 cpwm = pwrpriv->cpwm;
2865d42c	160	if (pwrpriv->cpwm != pwrpriv->rpwm) {
86587b67	161	_enter_pwrlock(&pwrpriv->lock);
2865d42c LF	162	cpwm = r8712_read8(padapter, SDIO_HCPWM);
	163	pwrpriv->rpwm_retry = 1;
	164	r8712_set_rpwm(padapter, pwrpriv->rpwm);
86587b67	165	up(&pwrpriv->lock);
2865d42c	166	}
2865d42c LF	167	}
	168
	169	static void rpwm_check_handler (void *FunctionContext)
	170	{
	171	struct _adapter adapter = (struct _adapter )FunctionContext;
	172	_rpwm_check_handler(adapter);
	173	}
	174
	175	void r8712_init_pwrctrl_priv(struct _adapter *padapter)
	176	{
	177	struct pwrctrl_priv *pwrctrlpriv = &padapter->pwrctrlpriv;
	178
	179	memset((unsigned char *)pwrctrlpriv, 0, sizeof(struct pwrctrl_priv));
	180	sema_init(&pwrctrlpriv->lock, 1);
	181	pwrctrlpriv->cpwm = PS_STATE_S4;
	182	pwrctrlpriv->pwr_mode = PS_MODE_ACTIVE;
	183	pwrctrlpriv->smart_ps = 0;
	184	pwrctrlpriv->tog = 0x80;
	185	/* clear RPWM to ensure driver and fw back to initial state. */
	186	r8712_write8(padapter, 0x1025FE58, 0);
	187	_init_workitem(&(pwrctrlpriv->SetPSModeWorkItem),
	188	SetPSModeWorkItemCallback, padapter);
	189	_init_workitem(&(pwrctrlpriv->rpwm_workitem),
	190	rpwm_workitem_callback, padapter);
	191	_init_timer(&(pwrctrlpriv->rpwm_check_timer),
	192	padapter->pnetdev, rpwm_check_handler, (u8 *)padapter);
	193	}
	194
	195	/*
	196	Caller: r8712_cmd_thread
	197
	198	Check if the fw_pwrstate is okay for issuing cmd.
	199	If not (cpwm should be is less than P2 state), then the sub-routine
	200	will raise the cpwm to be greater than or equal to P2.
	201
	202	Calling Context: Passive
	203
	204	Return Value:
	205
	206	_SUCCESS: r8712_cmd_thread can issue cmds to firmware afterwards.
	207	_FAIL: r8712_cmd_thread can not do anything.
	208	*/
	209	sint r8712_register_cmd_alive(struct _adapter *padapter)
	210	{
	211	uint res = _SUCCESS;
	212	struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv;
	213
	214	_enter_pwrlock(&pwrctrl->lock);
	215	register_task_alive(pwrctrl, CMD_ALIVE);
	216	if (pwrctrl->cpwm < PS_STATE_S2) {
	217	r8712_set_rpwm(padapter, PS_STATE_S3);
	218	res = _FAIL;
	219	}
	220	up(&pwrctrl->lock);
	221	return res;
	222	}
	223
	224	/*
	225	Caller: ISR
	226
	227	If ISR's txdone,
	228	No more pkts for TX,
	229	Then driver shall call this fun. to power down firmware again.
	230	*/
231
232	void r8712_unregister_cmd_alive(struct _adapter *padapter)
233	{
234	struct pwrctrl_priv *pwrctrl = &padapter->pwrctrlpriv;
235
236	_enter_pwrlock(&pwrctrl->lock);
237	unregister_task_alive(pwrctrl, CMD_ALIVE);
238	if ((pwrctrl->cpwm > PS_STATE_S2) &&
239	(pwrctrl->pwr_mode > PS_MODE_ACTIVE)) {
240	if ((pwrctrl->alives == 0) &&
241	(check_fwstate(&padapter->mlmepriv,
242	_FW_UNDER_LINKING) != true)) {
243	r8712_set_rpwm(padapter, PS_STATE_S0);
244	}
245	}
246	up(&pwrctrl->lock);
247	}