cmd: allow sound command to play multiple sounds

Currently the sound command accepts only one value each for duration and
frequency. Allowing more duration and frequency arguments enables playing a
tune.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/cmd/sound.c b/cmd/sound.c
index 20ac3f7..cef71be 100644 (file)
--- a/cmd/sound.c
+++ b/cmd/sound.c
@@ -39,26 +39,39 @@ static int do_play(struct cmd_tbl *cmdtp, int flag, int argc,
        int ret = 0;
        int msec = 1000;
        int freq = 400;
-
-       if (argc > 1)
-               msec = dectoul(argv[1], NULL);
-       if (argc > 2)
-               freq = dectoul(argv[2], NULL);
+       bool first = true;
 
        ret = uclass_first_device_err(UCLASS_SOUND, &dev);
-       if (!ret)
+       if (ret)
+               goto err;
+       --argc;
+       ++argv;
+       while (argc || first) {
+               first = false;
+               if (argc && *argv[0] != '-') {
+                       msec = dectoul(argv[0], NULL);
+                       --argc;
+                       ++argv;
+               }
+               if (argc && *argv[0] != '-') {
+                       freq = dectoul(argv[0], NULL);
+                       --argc;
+                       ++argv;
+               }
                ret = sound_beep(dev, msec, freq);
-       if (ret) {
-               printf("Sound device failed to play (err=%d)\n", ret);
-               return CMD_RET_FAILURE;
+               if (ret)
+                       goto err;
        }
-
        return 0;
+
+err:
+       printf("Sound device failed to play (err=%d)\n", ret);
+       return CMD_RET_FAILURE;
 }
 
 static struct cmd_tbl cmd_sound_sub[] = {
        U_BOOT_CMD_MKENT(init, 0, 1, do_init, "", ""),
-       U_BOOT_CMD_MKENT(play, 2, 1, do_play, "", ""),
+       U_BOOT_CMD_MKENT(play, INT_MAX, 1, do_play, "", ""),
 };
 
 /* process sound command */
@@ -83,8 +96,10 @@ static int do_sound(struct cmd_tbl *cmdtp, int flag, int argc,
 }
 
 U_BOOT_CMD(
-       sound, 4, 1, do_sound,
+       sound, INT_MAX, 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"
+       "sound play [[[-q|-s] len [freq]] ...] - play sounds\n"
+       "  len - duration in ms\n"
+       "  freq - frequency in Hz\n"
 );

diff --git a/doc/usage/cmd/sound.rst b/doc/usage/cmd/sound.rst
index d3fac24..2cfe9b7 100644 (file)
--- a/doc/usage/cmd/sound.rst
+++ b/doc/usage/cmd/sound.rst
@@ -10,12 +10,12 @@ Synopsis
 ::
 
     sound init
-    sound play [len [freq]]
+    sound play [[len freq] ...] [len [freq]]
 
 Description
 -----------
 
-The *sound* command is used to play a beep sound.
+The *sound* command is used to play one or multiple beep sounds.
 
 sound init
     initializes the sound driver.
@@ -30,6 +30,25 @@ len
 freq
     frequency of the sound in Hz, defaults to 400 Hz
 
+Examples
+--------
+
+Beep at 400 Hz for 1000 ms::
+
+    sound play
+
+Beep at 400 Hz for 600 ms::
+
+    sound play 600
+
+Beep at 500 Hz for 600 ms::
+
+    sound play 600 500
+
+Play melody::
+
+    sound play 500 1047 500 880 500 0 500 1047 500 880 500 0 500 784 500 698 500 784 1000 698
+
 Configuration
 -------------