1 files changed, 54 insertions, 0 deletions
diff --git a/chip/g/spp.h b/chip/g/spp.h
new file mode 100644
index 0000000000..fcf0cea3fe
--- /dev/null
+++ b/chip/g/spp.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2015 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef __CROS_EC_INCLUDE_SPP_H
+#define __CROS_EC_INCLUDE_SPP_H
+
+#include "spi.h"
+#include "util.h"
+
+/* SPP Control Mode */
+enum spp_mode {
+	SPP_GENERIC_MODE = 0,
+	SPP_SWETLAND_MODE = 1,
+	SPP_ROM_MODE = 2,
+	SPP_UNDEF_MODE = 3,
+};
+
+/* Receive and transmit FIFO size and mask. */
+#define SPP_FIFO_SIZE		BIT(10)
+#define SPP_FIFO_MASK		(SPP_FIFO_SIZE - 1)
+
+/*
+ * Tx interrupt callback function prototype. This function returns a portion
+ * of the received SPI data and current status of the CS line. When CS is
+ * deasserted, this function is called with data_size of zero and a non-zero
+ * cs_status. This allows the recipient to delineate the SPP frames.
+ */
+typedef void (*rx_handler_f)(uint8_t *data, size_t data_size, int cs_disabled);
+
+/*
+ * Push data to the SPP TX FIFO
+ * @param data Pointer to 8-bit data
+ * @param data_size Number of bytes to transmit
+ * @return : actual number of bytes placed into tx fifo
+ */
+int spp_transmit(uint8_t *data, size_t data_size);
+
+/*
+ * These functions return zero on success or non-zero on failure (attempt to
+ * register a callback on top of existing one, or attempt to unregister
+ * non-existing callback.
+ *
+ * rx_fifo_threshold value of zero means 'default'.
+ */
+int spp_register_rx_handler(enum spp_mode mode,
+			    rx_handler_f rx_handler,
+			    unsigned rx_fifo_threshold);
+int spp_unregister_rx_handler(void);
+void spp_tx_status(uint8_t byte);
+
+#endif