drivers/console: Making console input generic

Input line length can be modified via Kconfig.

Change-Id: I3423fce9814e04b11d11e5d391f85fe1efbe8d17
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>

drivers/console/Kconfig

@@ -12,6 +12,13 @@ menuconfig CONSOLE
 
 if CONSOLE
 
+config CONSOLE_INPUT_MAX_LINE_LEN
+	int "Console maximum input line length"
+	default 128
+	help
+	This option can be used to modify the maximum length a console input
+	can be.
+
 config CONSOLE_HAS_DRIVER
 	bool
 	default n

include/drivers/console/console.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2017 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef __CONSOLE_H__
+#define __CONSOLE_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define CONSOLE_MAX_LINE_LEN CONFIG_CONSOLE_INPUT_MAX_LINE_LEN
+
+/** @brief Console input representation
+ *
+ * This struct is used to represent an input line from a console.
+ * Recorded line must be NULL terminated.
+ */
+struct console_input {
+	/** FIFO uses first 4 bytes itself, reserve space */
+	int _unused;
+	/** Buffer where the input line is recorded */
+	char line[CONSOLE_MAX_LINE_LEN];
+};
+
+/** @brief Console input processing handler signature
+ *
+ *  Input processing is started when string is typed in the console.
+ *  Carriage return is translated to NULL making string always NULL
+ *  terminated. Application before calling register function need to
+ *  initialize two fifo queues mentioned below.
+ *
+ *  @param avail k_fifo queue keeping available input slots
+ *  @param lines k_fifo queue of entered lines which to be processed
+ *         in the application code.
+ *  @param completion callback for tab completion of entered commands
+ *
+ *  @return N/A
+ */
+typedef void (*console_input_fn)(struct k_fifo *avail, struct k_fifo *lines,
+				 uint8_t (*completion)(char *str, uint8_t len));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __CONSOLE_H__ */