common/cmd_ethsw: Add generic commands for Ethernet Switches

This patch creates a flexible parser for Ethernet Switch
configurations that should support complex commands.
The parser searches for predefined keywords in the command
and calls the proper function when a match is found.
Also, the parser allows for optional keywords, such as
"port", to apply the command on a port
or on all ports. For now, the defined commands are:
ethsw [port <port_no>] { enable | disable | show }

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/include/ethsw.h b/include/ethsw.h
new file mode 100644
index 0000000..9e80095
--- /dev/null
+++ b/include/ethsw.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:      GPL-2.0+
+ *
+ * Ethernet Switch commands
+ */
+
+#ifndef _CMD_ETHSW_H_
+#define _CMD_ETHSW_H_
+
+#define ETHSW_MAX_CMD_PARAMS 20
+#define ETHSW_CMD_PORT_ALL -1
+
+/* IDs used to track keywords in a command */
+enum ethsw_keyword_id {
+	ethsw_id_key_end = -1,
+	ethsw_id_help,
+	ethsw_id_show,
+	ethsw_id_port,
+	ethsw_id_enable,
+	ethsw_id_disable,
+	ethsw_id_count,	/* keep last */
+};
+
+enum ethsw_keyword_opt_id {
+	ethsw_id_port_no = ethsw_id_count + 1,
+	ethsw_id_count_all,	/* keep last */
+};
+
+struct ethsw_command_def {
+	int cmd_to_keywords[ETHSW_MAX_CMD_PARAMS];
+	int cmd_keywords_nr;
+	int port;
+	int (*cmd_function)(struct ethsw_command_def *parsed_cmd);
+};
+
+/* Structure to be created and initialized by an Ethernet Switch driver */
+struct ethsw_command_func {
+	const char *ethsw_name;
+	int (*port_enable)(struct ethsw_command_def *parsed_cmd);
+	int (*port_disable)(struct ethsw_command_def *parsed_cmd);
+	int (*port_show)(struct ethsw_command_def *parsed_cmd);
+};
+
+int ethsw_define_functions(const struct ethsw_command_func *cmd_func);
+
+#endif /* _CMD_ETHSW_H_ */