[MFD] Add multimedia communication port core support

Add support for the core of the multimedia communication port
framework.  This is a port used to communicate with devices
with two DMA paths and a control path.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 66 insertions, 0 deletions

diff --git a/drivers/mfd/mcp.h b/drivers/mfd/mcp.h
new file mode 100644
index 000000000000..c093a93b8808
--- /dev/null
+++ b/drivers/mfd/mcp.h
@@ -0,0 +1,66 @@
+/*
+ *  linux/drivers/mfd/mcp.h
+ *
+ *  Copyright (C) 2001 Russell King, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+ */
+#ifndef MCP_H
+#define MCP_H
+
+struct mcp_ops;
+
+struct mcp {
+        struct module   *owner;
+        struct mcp_ops  *ops;
+        spinlock_t      lock;
+        int             use_count;
+        unsigned int    sclk_rate;
+        unsigned int    rw_timeout;
+        dma_device_t    dma_audio_rd;
+        dma_device_t    dma_audio_wr;
+        dma_device_t    dma_telco_rd;
+        dma_device_t    dma_telco_wr;
+        struct device   attached_device;
+};
+
+struct mcp_ops {
+        void            (*set_telecom_divisor)(struct mcp *, unsigned int);
+        void            (*set_audio_divisor)(struct mcp *, unsigned int);
+        void            (*reg_write)(struct mcp *, unsigned int, unsigned int);
+        unsigned int    (*reg_read)(struct mcp *, unsigned int);
+        void            (*enable)(struct mcp *);
+        void            (*disable)(struct mcp *);
+};
+
+void mcp_set_telecom_divisor(struct mcp *, unsigned int);
+void mcp_set_audio_divisor(struct mcp *, unsigned int);
+void mcp_reg_write(struct mcp *, unsigned int, unsigned int);
+unsigned int mcp_reg_read(struct mcp *, unsigned int);
+void mcp_enable(struct mcp *);
+void mcp_disable(struct mcp *);
+#define mcp_get_sclk_rate(mcp)  ((mcp)->sclk_rate)
+
+struct mcp *mcp_host_alloc(struct device *, size_t);
+int mcp_host_register(struct mcp *);
+void mcp_host_unregister(struct mcp *);
+
+struct mcp_driver {
+        struct device_driver drv;
+        int (*probe)(struct mcp *);
+        void (*remove)(struct mcp *);
+        int (*suspend)(struct mcp *, pm_message_t);
+        int (*resume)(struct mcp *);
+};
+
+int mcp_driver_register(struct mcp_driver *);
+void mcp_driver_unregister(struct mcp_driver *);
+
+#define mcp_get_drvdata(mcp)    dev_get_drvdata(&(mcp)->attached_device)
+#define mcp_set_drvdata(mcp,d)  dev_set_drvdata(&(mcp)->attached_device, d)
+
+#define mcp_priv(mcp)           ((void *)((mcp)+1))
+
+#endif