Staging: sources for HCI LL PM protocol
Texas Instruments BT, FM and GPS combo chips/drivers make use of a single TTY to communicate with the chip. This module constitutes the proprietary power management protocol from TI for the BT/FM/GPS combo chips Signed-off-by: Pavan Savoy <pavan_savoy@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Pavan Savoy
Greg Kroah-Hartman
parent
d0088ce183
commit
1d065ab683
|
|
@ -0,0 +1,147 @@
|
|||
/*
|
||||
* Shared Transport driver
|
||||
* HCI-LL module responsible for TI proprietary HCI_LL protocol
|
||||
* Copyright (C) 2009 Texas Instruments
|
||||
*
|
||||
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*
|
||||
*/
|
||||
|
||||
#define pr_fmt(fmt) "(stll) :" fmt
|
||||
#include "st_ll.h"
|
||||
|
||||
/**********************************************************************/
|
||||
/* internal functions */
|
||||
static void send_ll_cmd(struct st_data_s *st_data,
|
||||
unsigned char cmd)
|
||||
{
|
||||
|
||||
pr_info("%s: writing %x", __func__, cmd);
|
||||
st_int_write(st_data, &cmd, 1);
|
||||
return;
|
||||
}
|
||||
|
||||
static void ll_device_want_to_sleep(struct st_data_s *st_data)
|
||||
{
|
||||
pr_info("%s", __func__);
|
||||
/* sanity check */
|
||||
if (st_data->ll_state != ST_LL_AWAKE)
|
||||
pr_err("ERR hcill: ST_LL_GO_TO_SLEEP_IND"
|
||||
"in state %ld", st_data->ll_state);
|
||||
|
||||
send_ll_cmd(st_data, LL_SLEEP_ACK);
|
||||
/* update state */
|
||||
st_data->ll_state = ST_LL_ASLEEP;
|
||||
}
|
||||
|
||||
static void ll_device_want_to_wakeup(struct st_data_s *st_data)
|
||||
{
|
||||
/* diff actions in diff states */
|
||||
switch (st_data->ll_state) {
|
||||
case ST_LL_ASLEEP:
|
||||
send_ll_cmd(st_data, LL_WAKE_UP_ACK); /* send wake_ack */
|
||||
break;
|
||||
case ST_LL_ASLEEP_TO_AWAKE:
|
||||
/* duplicate wake_ind */
|
||||
pr_err("duplicate wake_ind while waiting for Wake ack");
|
||||
break;
|
||||
case ST_LL_AWAKE:
|
||||
/* duplicate wake_ind */
|
||||
pr_err("duplicate wake_ind already AWAKE");
|
||||
break;
|
||||
case ST_LL_AWAKE_TO_ASLEEP:
|
||||
/* duplicate wake_ind */
|
||||
pr_err("duplicate wake_ind");
|
||||
break;
|
||||
}
|
||||
/* update state */
|
||||
st_data->ll_state = ST_LL_AWAKE;
|
||||
}
|
||||
|
||||
/**********************************************************************/
|
||||
/* functions invoked by ST Core */
|
||||
|
||||
/* called when ST Core wants to
|
||||
* enable ST LL */
|
||||
void st_ll_enable(struct st_data_s *ll)
|
||||
{
|
||||
ll->ll_state = ST_LL_AWAKE;
|
||||
}
|
||||
|
||||
/* called when ST Core /local module wants to
|
||||
* disable ST LL */
|
||||
void st_ll_disable(struct st_data_s *ll)
|
||||
{
|
||||
ll->ll_state = ST_LL_INVALID;
|
||||
}
|
||||
|
||||
/* called when ST Core wants to update the state */
|
||||
void st_ll_wakeup(struct st_data_s *ll)
|
||||
{
|
||||
if (likely(ll->ll_state != ST_LL_AWAKE)) {
|
||||
send_ll_cmd(ll, LL_WAKE_UP_IND); /* WAKE_IND */
|
||||
ll->ll_state = ST_LL_ASLEEP_TO_AWAKE;
|
||||
} else {
|
||||
/* don't send the duplicate wake_indication */
|
||||
pr_err(" Chip already AWAKE ");
|
||||
}
|
||||
}
|
||||
|
||||
/* called when ST Core wants the state */
|
||||
unsigned long st_ll_getstate(struct st_data_s *ll)
|
||||
{
|
||||
pr_info(" returning state %ld", ll->ll_state);
|
||||
return ll->ll_state;
|
||||
}
|
||||
|
||||
/* called from ST Core, when a PM related packet arrives */
|
||||
unsigned long st_ll_sleep_state(struct st_data_s *st_data,
|
||||
unsigned char cmd)
|
||||
{
|
||||
switch (cmd) {
|
||||
case LL_SLEEP_IND: /* sleep ind */
|
||||
pr_info("sleep indication recvd");
|
||||
ll_device_want_to_sleep(st_data);
|
||||
break;
|
||||
case LL_SLEEP_ACK: /* sleep ack */
|
||||
pr_err("sleep ack rcvd: host shouldn't");
|
||||
break;
|
||||
case LL_WAKE_UP_IND: /* wake ind */
|
||||
pr_info("wake indication recvd");
|
||||
ll_device_want_to_wakeup(st_data);
|
||||
break;
|
||||
case LL_WAKE_UP_ACK: /* wake ack */
|
||||
pr_info("wake ack rcvd");
|
||||
st_data->ll_state = ST_LL_AWAKE;
|
||||
break;
|
||||
default:
|
||||
pr_err(" unknown input/state ");
|
||||
return ST_ERR_FAILURE;
|
||||
}
|
||||
return ST_SUCCESS;
|
||||
}
|
||||
|
||||
/* Called from ST CORE to initialize ST LL */
|
||||
long st_ll_init(struct st_data_s *ll)
|
||||
{
|
||||
/* set state to invalid */
|
||||
ll->ll_state = ST_LL_INVALID;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Called from ST CORE to de-initialize ST LL */
|
||||
long st_ll_deinit(struct st_data_s *ll)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,62 @@
|
|||
/*
|
||||
* Shared Transport Low Level (ST LL)
|
||||
*
|
||||
* Copyright (C) 2009 Texas Instruments
|
||||
*
|
||||
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef ST_LL_H
|
||||
#define ST_LL_H
|
||||
|
||||
#include <linux/skbuff.h>
|
||||
#include "st.h"
|
||||
#include "st_core.h"
|
||||
|
||||
/* ST LL receiver states */
|
||||
#define ST_W4_PACKET_TYPE 0
|
||||
#define ST_BT_W4_EVENT_HDR 1
|
||||
#define ST_BT_W4_ACL_HDR 2
|
||||
#define ST_BT_W4_SCO_HDR 3
|
||||
#define ST_BT_W4_DATA 4
|
||||
#define ST_FM_W4_EVENT_HDR 5
|
||||
#define ST_GPS_W4_EVENT_HDR 6
|
||||
|
||||
/* ST LL state machines */
|
||||
#define ST_LL_ASLEEP 0
|
||||
#define ST_LL_ASLEEP_TO_AWAKE 1
|
||||
#define ST_LL_AWAKE 2
|
||||
#define ST_LL_AWAKE_TO_ASLEEP 3
|
||||
#define ST_LL_INVALID 4
|
||||
|
||||
#define LL_SLEEP_IND 0x30
|
||||
#define LL_SLEEP_ACK 0x31
|
||||
#define LL_WAKE_UP_IND 0x32
|
||||
#define LL_WAKE_UP_ACK 0x33
|
||||
|
||||
/* initialize and de-init ST LL */
|
||||
long st_ll_init(struct st_data_s *);
|
||||
long st_ll_deinit(struct st_data_s *);
|
||||
|
||||
/* enable/disable ST LL along with KIM start/stop
|
||||
* called by ST Core
|
||||
*/
|
||||
void st_ll_enable(struct st_data_s *);
|
||||
void st_ll_disable(struct st_data_s *);
|
||||
|
||||
unsigned long st_ll_getstate(struct st_data_s *);
|
||||
unsigned long st_ll_sleep_state(struct st_data_s *, unsigned char);
|
||||
void st_ll_wakeup(struct st_data_s *);
|
||||
#endif /* ST_LL_H */
|
||||
Loading…
Reference in New Issue