Sound: Add command for audio playback

This patch adds command to test audio playback.
sound init - Initialises the audio subsystem (i2s and wm8994 codec)
sound play - Plays predefined the audio data when specified length
and frequency.

Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

common/Makefile

@@ -75,6 +75,7 @@ COBJS-$(CONFIG_CMD_CONSOLE) += cmd_console.o
 COBJS-$(CONFIG_CMD_CPLBINFO) += cmd_cplbinfo.o
 COBJS-$(CONFIG_DATAFLASH_MMC_SELECT) += cmd_dataflash_mmc_mux.o
 COBJS-$(CONFIG_CMD_DATE) += cmd_date.o
+COBJS-$(CONFIG_CMD_SOUND) += cmd_sound.o
 ifdef CONFIG_4xx
 COBJS-$(CONFIG_CMD_SETGETDCR) += cmd_dcr.o
 endif

common/cmd_sound.c

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ * Rajeshwari Shinde <rajeshwari.s@samsung.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <fdtdec.h>
+#include <sound.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Initilaise sound subsystem */
+static int do_init(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+	int ret;
+
+	ret = sound_init();
+	if (ret) {
+		printf("Initialise Audio driver failed\n");
+		return CMD_RET_FAILURE;
+	}
+
+	return 0;
+}
+
+/* play sound from buffer */
+static int do_play(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+	int ret = 0;
+	int msec = 1000;
+	int freq = 400;
+
+	if (argc > 1)
+		msec = simple_strtoul(argv[1], NULL, 10);
+	if (argc > 2)
+		freq = simple_strtoul(argv[2], NULL, 10);
+
+	ret = sound_play(msec, freq);
+	if (ret) {
+		printf("play failed");
+		return CMD_RET_FAILURE;
+	}
+
+	return 0;
+}
+
+static cmd_tbl_t cmd_sound_sub[] = {
+	U_BOOT_CMD_MKENT(init, 0, 1, do_init, "", ""),
+	U_BOOT_CMD_MKENT(play, 2, 1, do_play, "", ""),
+};
+
+/* process sound command */
+static int do_sound(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+	cmd_tbl_t *c;
+
+	if (argc < 1)
+		return CMD_RET_USAGE;
+
+	/* Strip off leading 'sound' command argument */
+	argc--;
+	argv++;
+
+	c = find_cmd_tbl(argv[0], &cmd_sound_sub[0], ARRAY_SIZE(cmd_sound_sub));
+
+	if (c)
+		return c->cmd(cmdtp, flag, argc, argv);
+	else
+		return CMD_RET_USAGE;
+}
+
+U_BOOT_CMD(
+	sound, 4, 1, do_sound,
+	"sound sub-system",
+	"init - initialise the sound driver\n"
+	"sound play [len] [freq] - play a sound for len ms at freq hz\n"
+);