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: NPavan Savoy <pavan_savoy@ti.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/ti-st/st_core.h

+/*
+ *  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 */