This patch adds simple API to shared memory driver based on msm-smd.h
This is required in order to add support for support Qualcomm BT chips
via SMD
Signed-off-by: Lukasz Rymanowski <lukasz.rymanowski@xxxxxxxxx>
---
include/linux/smd.h | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 69 insertions(+)
create mode 100644 include/linux/smd.h
diff --git a/include/linux/smd.h b/include/linux/smd.h
new file mode 100644
index 0000000..58de0d4
--- /dev/null
+++ b/include/linux/smd.h
@@ -0,0 +1,69 @@
+/*
+* smd.h - API for Shared Memory Driver
+*
+* Copyright (c) 2014 Intel Corporation
+*
+* 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.
+*/
+
+#ifndef _SMD_H_
+#define _SMD_H_
+
+#include <linux/platform_device.h>
+
+/**
+* Events from smd device.
+*/
+#define SMD_EVENT_DATA 1
+#define SMD_EVENT_OPEN 2
+#define SMD_EVENT_CLOSE 3
+
+struct smd_channel;
+struct smd_notify_data;
+struct smd_data;
+
+/**
+* struct smd_ops - specific operation for smd channel
+*
+* @open: Open SMD channel. It should return zero once device is opened.
+* On open there is need to pass notification cb which is used
+* for notifications form SMD device.
+* @close Close SMD channel
+* @write: Write data to SMD channel. It should return number of written
+* bytes or negative value in case of error.
+* @read: Read data from SMD channel.It should return number of written
+* bytes or negative value in case of error.
+*@read_avail: Returns number of bytes ready to be read. This should be called
+* before read in order to allocate enought skb
+*
+*/
+struct smd_ops {
+ int (*open)(struct smd_data *s,
+ void (*notify)(struct platform_device *pdev,
+ unsigned int event));
+ int (*close)(struct smd_data *s);
+ int (*write)(struct smd_data *s, const void *data, int len);
+ int (*read)(struct smd_data *s, void *buf, int len);
+ int (*read_avail)(struct smd_data *s);
+};
+/**
+* struct smd_data - smd device data for shared memory channel
+*
+* @pdev: Platform device for given smd channel.
+* @ops: SMD specific operations for this smd channel.
+* @ch: SMD channel which is used by SMD device. Should not be
+* used by the driver
+* @notifier: SMD notifier data. Shall not be used by driver.
+*
+* smd_data are initialized by the platform and are available for driver
+* in platform_data.
+*/
+struct smd_data {
+ struct platform_device *pdev;
+ struct smd_ops ops;
+ struct smd_channel *ch;
+ struct smd_notify_data *notify_data;
+};
+#endif
--
1.8.4
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