1 files changed, 82 insertions, 0 deletions
diff --git a/arch/arm/mach-ux500/include/mach/mbox_channels-db5500.h b/arch/arm/mach-ux500/include/mach/mbox_channels-db5500.h
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+++ b/arch/arm/mach-ux500/include/mach/mbox_channels-db5500.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2011
+ * Author: Marcin Mielczarczyk <marcin.mielczarczyk@tieto.com> for ST-Ericsson.
+ *         Bibek Basu <bibek.basu@stericsson.com>
+ * License terms: GNU General Public License (GPL), version 2.
+ */
+
+#ifndef __INC_MBOX_CHANNELS_H
+#define __INC_MBOX_CHANNELS_H
+
+/* Maximum number of datawords which can be send in one PDU */
+#define MAILBOX_NR_OF_DATAWORDS	3
+
+/* Number of buffers */
+#define NUM_DSP_BUFFER		32
+
+/**
+ * mbox_channel_cb_t - Definition of the mailbox channel callback.
+ * @data:	Pointer to the data.
+ * @length:	Length of the data.
+ * @priv:	The client's private data.
+ *
+ * This function will be called upon reception of complete mbox channel PDU
+ * or after completion of send operation.
+ */
+typedef void mbox_channel_cb_t (u32 *data, u32 length, void *priv);
+
+/**
+ * struct mbox_channel_msg - Definition of mbox channel message
+ * @channel:	Channel number.
+ * @data:	Pointer to data to be sent.
+ * @length:	Length of data to be sent.
+ * @cb:	Pointer to the callback function to be called when send
+ *		operation will be finished.
+ * @priv:	The client's private data.
+ *
+ * This structure describes mailbox channel message.
+ */
+struct mbox_channel_msg {
+	u16			channel;
+	u32			*data;
+	u8			length;
+	mbox_channel_cb_t	*cb;
+	void			*priv;
+};
+
+/**
+ * mbox_channel_register - Set up a given mailbox channel.
+ * @channel:	Mailbox channel number.
+ * @cb:	Pointer to the callback function to be called when a new message
+ *		is received.
+ * @priv:	Client user data which will be returned in the callback.
+ *
+ * Returns 0 on success or a negative error code on error.
+ */
+int mbox_channel_register(u16 channel, mbox_channel_cb_t *cb, void *priv);
+
+/**
+ * mbox_channel_send - Send data on given mailbox channel.
+ * @msg:	Mailbox channel message to be sent.
+ *
+ * Returns 0 on success or a negative error code on error.
+ */
+int mbox_channel_send(struct mbox_channel_msg *msg);
+
+/**
+ * mbox_channel_revoke_messages - Revoke messages on given mailbox channel.
+ * @channel:	Mailbox channel number.
+ *
+ * Returns 0 on success or a negative error code on error.
+ */
+int mbox_channel_revoke_messages(u16 channel);
+
+/**
+ * mbox_channel_deregister - de-register given mailbox channel.
+ * @channel:    Mailbox channel number.
+ *
+ * Returns 0 on success or a negative error code on error.
+ */
+int mbox_channel_deregister(u16 channel);
+
+#endif /*INC_STE_MBOX_H*/