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Staging: sources for ST core

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Texas Instruments BT, FM and GPS combo chips/drivers
make use of a single TTY to communicate with the chip.
This module constitutes the core logic, TTY ldisc driver
and the exported symbols for registering/unregistering of
the protocol drivers such as BT/FM/GPS.

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 2010-04-08 13:16:53 -05:00 committed by Greg Kroah-Hartman
parent fb2a8c88bf
commit 53618cc1e5
2 changed files with 1160 additions and 0 deletions
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drivers/staging/ti-st/st_core.c Normal file
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/*
* Shared Transport Core header file
*
* 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_CORE_H
#define ST_CORE_H
#include <linux/skbuff.h>
#include "st.h"
/* states of protocol list */
#define ST_NOTEMPTY 1
#define ST_EMPTY 0
/*
* possible st_states
*/
#define ST_INITIALIZING 1
#define ST_REG_IN_PROGRESS 2
#define ST_REG_PENDING 3
#define ST_WAITING_FOR_RESP 4
/*
* local data required for ST/KIM/ST-HCI-LL
*/
struct st_data_s {
unsigned long st_state;
/*
* an instance of tty_struct & ldisc ops to move around
*/
struct tty_struct *tty;
struct tty_ldisc_ops *ldisc_ops;
/*
* the tx skb -
* if the skb is already dequeued and the tty failed to write the same
* maintain the skb to write in the next transaction
*/
struct sk_buff *tx_skb;
#define ST_TX_SENDING 1
#define ST_TX_WAKEUP 2
unsigned long tx_state;
/*
* list of protocol registered
*/
struct st_proto_s *list[ST_MAX];
/*
* lock
*/
unsigned long rx_state;
unsigned long rx_count;
struct sk_buff *rx_skb;
struct sk_buff_head txq, tx_waitq;
spinlock_t lock; /* ST LL state lock */
unsigned char protos_registered;
unsigned long ll_state; /* ST LL power state */
};
/* point this to tty->driver->write or tty->ops->write
* depending upon the kernel version
*/
int st_int_write(struct st_data_s*, const unsigned char*, int);
/* internal write function, passed onto protocol drivers
* via the write function ptr of protocol struct
*/
long st_write(struct sk_buff *);
/* function to be called from ST-LL
*/
void st_ll_send_frame(enum proto_type, struct sk_buff *);
/* internal wake up function */
void st_tx_wakeup(struct st_data_s *st_data);
int st_core_init(struct st_data_s **);
void st_core_exit(struct st_data_s *);
void st_kim_ref(struct st_data_s **);
#define GPS_STUB_TEST
#ifdef GPS_STUB_TEST
int gps_chrdrv_stub_write(const unsigned char*, int);
void gps_chrdrv_stub_init(void);
#endif
#endif /*ST_CORE_H */