Staging: sources for ST core
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>
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drivers/staging/ti-st/st_core.c
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drivers/staging/ti-st/st_core.c
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drivers/staging/ti-st/st_core.h
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/*
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* Shared Transport Core header file
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*
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* Copyright (C) 2009 Texas Instruments
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef ST_CORE_H
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#define ST_CORE_H
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#include <linux/skbuff.h>
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#include "st.h"
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/* states of protocol list */
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#define ST_NOTEMPTY 1
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#define ST_EMPTY 0
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/*
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* possible st_states
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*/
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#define ST_INITIALIZING 1
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#define ST_REG_IN_PROGRESS 2
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#define ST_REG_PENDING 3
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#define ST_WAITING_FOR_RESP 4
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/*
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* local data required for ST/KIM/ST-HCI-LL
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*/
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struct st_data_s {
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unsigned long st_state;
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/*
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* an instance of tty_struct & ldisc ops to move around
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*/
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struct tty_struct *tty;
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struct tty_ldisc_ops *ldisc_ops;
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/*
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* the tx skb -
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* if the skb is already dequeued and the tty failed to write the same
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* maintain the skb to write in the next transaction
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*/
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struct sk_buff *tx_skb;
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#define ST_TX_SENDING 1
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#define ST_TX_WAKEUP 2
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unsigned long tx_state;
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/*
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* list of protocol registered
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*/
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struct st_proto_s *list[ST_MAX];
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/*
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* lock
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*/
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unsigned long rx_state;
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unsigned long rx_count;
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struct sk_buff *rx_skb;
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struct sk_buff_head txq, tx_waitq;
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spinlock_t lock; /* ST LL state lock */
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unsigned char protos_registered;
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unsigned long ll_state; /* ST LL power state */
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};
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/* point this to tty->driver->write or tty->ops->write
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* depending upon the kernel version
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*/
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int st_int_write(struct st_data_s*, const unsigned char*, int);
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/* internal write function, passed onto protocol drivers
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* via the write function ptr of protocol struct
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*/
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long st_write(struct sk_buff *);
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/* function to be called from ST-LL
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*/
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void st_ll_send_frame(enum proto_type, struct sk_buff *);
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/* internal wake up function */
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void st_tx_wakeup(struct st_data_s *st_data);
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int st_core_init(struct st_data_s **);
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void st_core_exit(struct st_data_s *);
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void st_kim_ref(struct st_data_s **);
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#define GPS_STUB_TEST
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#ifdef GPS_STUB_TEST
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int gps_chrdrv_stub_write(const unsigned char*, int);
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void gps_chrdrv_stub_init(void);
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#endif
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#endif /*ST_CORE_H */
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