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/*
* Copyright (C) 2012 Spreadtrum Communications Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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.
*/
#ifndef __SBUF_H
#define __SBUF_H
/* flag for CMD/DONE msg type */
#define SMSG_CMD_SBUF_INIT 0x0001
#define SMSG_DONE_SBUF_INIT 0x0002
/* flag for EVENT msg type */
#define SMSG_EVENT_SBUF_WRPTR 0x0001
#define SMSG_EVENT_SBUF_RDPTR 0x0002
/* ring buf header */
struct sbuf_ring_header {
/* send-buffer info */
uint32_t txbuf_addr;
uint32_t txbuf_size;
uint32_t txbuf_rdptr;
uint32_t txbuf_wrptr;
/* recv-buffer info */
uint32_t rxbuf_addr;
uint32_t rxbuf_size;
uint32_t rxbuf_rdptr;
uint32_t rxbuf_wrptr;
};
/* sbuf_mem is the structure of smem for rings */
struct sbuf_smem_header {
uint32_t ringnr;
struct sbuf_ring_header headers[0];
};
struct sbuf_ring {
/* tx/rx buffer info */
volatile struct sbuf_ring_header *header;
void *txbuf_virt;
void *rxbuf_virt;
/* send/recv wait queue */
wait_queue_head_t txwait;
wait_queue_head_t rxwait;
/* send/recv mutex */
struct mutex txlock;
struct mutex rxlock;
void (*handler)(int event, void *data);
void *data;
};
#define SBUF_STATE_IDLE 0
#define SBUF_STATE_READY 1
struct sbuf_mgr {
uint8_t dst;
uint8_t channel;
uint32_t state;
void *smem_virt;
uint32_t smem_addr;
uint32_t smem_size;
uint32_t ringnr;
struct sbuf_ring *rings;
struct task_struct *thread;
};
#endif
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