1 /* linux/include/asm-arm/arch-msm/msm_smd.h
3 * Copyright (C) 2007 Google, Inc.
4 * Author: Brian Swetland <swetland@google.com>
6 * This software is licensed under the terms of the GNU General Public
7 * License version 2, as published by the Free Software Foundation, and
8 * may be copied, distributed, and modified under those terms.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
17 #ifndef __ASM_ARCH_MSM_SMD_H
18 #define __ASM_ARCH_MSM_SMD_H
20 typedef struct smd_channel smd_channel_t
;
22 /* warning: notify() may be called before open returns */
23 int smd_open(const char *name
, smd_channel_t
**ch
, void *priv
,
24 void (*notify
)(void *priv
, unsigned event
));
26 #define SMD_EVENT_DATA 1
27 #define SMD_EVENT_OPEN 2
28 #define SMD_EVENT_CLOSE 3
30 int smd_close(smd_channel_t
*ch
);
32 /* passing a null pointer for data reads and discards */
33 int smd_read(smd_channel_t
*ch
, void *data
, int len
);
35 /* Write to stream channels may do a partial write and return
36 ** the length actually written.
37 ** Write to packet channels will never do a partial write --
38 ** it will return the requested length written or an error.
40 int smd_write(smd_channel_t
*ch
, const void *data
, int len
);
42 int smd_write_avail(smd_channel_t
*ch
);
43 int smd_read_avail(smd_channel_t
*ch
);
45 /* Returns the total size of the current packet being read.
46 ** Returns 0 if no packets available or a stream channel.
48 int smd_cur_packet_size(smd_channel_t
*ch
);
50 /* used for tty unthrottling and the like -- causes the notify()
51 ** callback to be called from the same lock context as is used
52 ** when it is called from channel updates
54 void smd_kick(smd_channel_t
*ch
);
58 /* these are interruptable waits which will block you until the specified
59 ** number of bytes are readable or writable.
61 int smd_wait_until_readable(smd_channel_t
*ch
, int bytes
);
62 int smd_wait_until_writable(smd_channel_t
*ch
, int bytes
);
73 SMD_PORT_MEMCPY_SPARE1
,
101 SMD_PORT_CS_APPS_MODEM
,
102 SMD_PORT_CS_APPS_DSP
,
103 SMD_PORT_CS_MODEM_DSP
,