From 33cd3da5ada6f99ff03d707fe7f00732febc5b83 Mon Sep 17 00:00:00 2001
From: Jiucheng Xu <Jiucheng.Xu@freescale.com>
Date: Tue, 28 Aug 2012 15:34:14 +0000
Subject: TDM: Add a directly R/W API for tdm core

Tdm core exported the simple function interfaces for user in kernel space.

Signed-off-by: Jiucheng Xu <Jiucheng.Xu@freescale.com>
Signed-off-by: Kai.Jiang <Kai.Jiang@freescale.com>
Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com>
Signed-off-by: Xie Xiaobo <X.Xie@freescale.com>
Change-Id: Ifc8ef6b14f7cbc3c88fcfc5e4a1afd59564d8059
Reviewed-on: http://git.am.freescale.net:8181/904
Reviewed-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>
Tested-by: Fleming Andrew-AFLEMING <AFLEMING@freescale.com>

diff --git a/drivers/tdm/tdm-core.c b/drivers/tdm/tdm-core.c
index 666710a..3fd3242 100644
--- a/drivers/tdm/tdm-core.c
+++ b/drivers/tdm/tdm-core.c
@@ -1,6 +1,6 @@
 /* driver/tdm/tdm-core.c
  *
- * Copyright (C) 2012 Freescale Semiconductor, Inc, All rights reserved.
+ * Copyright 2012 Freescale Semiconductor, Inc.
  *
  * TDM core is the interface between TDM clients and TDM devices.
  * It is also intended to serve as an interface for line controld
@@ -359,6 +359,54 @@ module_exit(tdm_exit);
 
 /* Interface to the tdm device/adapter */
 
+/* tdm_read_direct - issue a TDM read
+ * @adap: Handle to TDM device
+ * @buf: Data that will be read from the TDM device
+ * @len: How many bytes to read
+ *
+ * Returns negative errno, or else 0.
+ */
+int tdm_read_direct(struct tdm_adapter *adap, u8 *buf, u32 len)
+{
+	int res;
+
+	if (adap->algo->tdm_read_simple)
+		res = adap->algo->tdm_read_simple(adap, buf, len);
+	else {
+		pr_err("TDM level read not supported\n");
+		return -EOPNOTSUPP;
+	}
+	/* If everything went ok (i.e. frame received), return #bytes
+	transmitted, else error code. */
+
+	return res;
+
+
+}
+EXPORT_SYMBOL(tdm_read_direct);
+
+/* tdm_write_direct - issue a TDM write
+ * @adap: Handle to TDM device
+ * @buf: Data that will be written to the TDM device
+ * @len: How many bytes to write
+ *
+ * Returns negative errno, or else 0.
+ */
+int tdm_write_direct(struct tdm_adapter *adap, u8 *buf, u32 len)
+{
+	int res;
+
+	if (adap->algo->tdm_write_simple)
+		res = adap->algo->tdm_write_simple(adap, buf, len);
+	else {
+		pr_err("TDM level write not supported\n");
+		return -EOPNOTSUPP;
+	}
+
+	return res;
+}
+EXPORT_SYMBOL(tdm_write_direct);
+
 /* tdm_adap_send - issue a TDM write
  * @adap: Handle to TDM device
  * @buf: Data that will be written to the TDM device
diff --git a/include/linux/tdm.h b/include/linux/tdm.h
index 8cf4ef5..1b64cb8 100644
--- a/include/linux/tdm.h
+++ b/include/linux/tdm.h
@@ -1,6 +1,6 @@
 /* include/linux/tdm.h
  *
- * Copyright (C) 2012 Freescale Semiconductor, Inc, All rights reserved.
+ * Copyright 2012 Freescale Semiconductor, Inc.
  *
  * tdm.h - definitions for the tdm-device framework interface
  *
@@ -62,6 +62,11 @@ static inline int ALIGN_SIZE(u64 size, u32 alignment)
 	return (size + alignment - 1) & (~(alignment - 1));
 }
 
+int tdm_master_send(struct tdm_adapter *adap, void **buf, int count);
+int tdm_master_recv(struct tdm_adapter *adap, void **buf);
+int tdm_read_direct(struct tdm_adapter *adap, u8 *buf, u32 len);
+int tdm_write_direct(struct tdm_adapter *adap, u8 *buf, u32 len);
+
 /**
  * struct tdm_driver - represent an TDM device driver
  * @class: What kind of tdm device we instantiate (for detect)
@@ -221,6 +226,8 @@ struct tdm_channel {
 struct tdm_adapt_algorithm {
 	u32 (*tdm_read)(struct tdm_adapter *, u16 **);
 	u32 (*tdm_get_write_buf)(struct tdm_adapter *, u16 **);
+	int (*tdm_read_simple)(struct tdm_adapter *, u8 *, u32 len);
+	int (*tdm_write_simple)(struct tdm_adapter *, u8 *, u32 len);
 	u32 (*tdm_write)(struct tdm_adapter *, void * , unsigned int len);
 	int (*tdm_enable)(struct tdm_adapter *);
 	int (*tdm_disable)(struct tdm_adapter *);
-- 
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