Add a small "hdajacksensetest" helper

I previously had a small python script doing the same thing,
but it depended on hda-analyzer, which always breaks when something
new is added to the codec proc file.

I got tired and rewrote it as a small C program instead, which I
hope will be a useful addition to alsa-tools.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

hdajacksensetest/Makefile.am

@@ -0,0 +1,12 @@
+MYNAME = hdajacksensetest
+AUTOMAKE_OPTIONS = foreign
+bin_PROGRAMS = hdajacksensetest
+AM_CFLAGS = @GLIB_CFLAGS@ -I "../hdajackretask/" -I "../hda-verb/"
+hdajacksensetest_SOURCES = hdajacksensetest.c ../hdajackretask/sysfs-pin-configs.c
+hdajacksensetest_LDADD = @GLIB_LIBS@
+
+alsa-dist: distdir
+	@rm -rf ../distdir/$(MYNAME)
+	@mkdir -p ../distdir/$(MYNAME)
+	@cp -RLpv $(distdir)/* ../distdir/$(MYNAME)
+	@rm -rf $(distdir)

hdajacksensetest/configure.ac

@@ -0,0 +1,10 @@
+AC_INIT(hdajacksensetest, 0.20141006)
+AM_INIT_AUTOMAKE(subdir-objects)
+AM_MAINTAINER_MODE([enable])
+AC_PROG_CC
+AC_PROG_INSTALL
+AC_HEADER_STDC
+
+PKG_CHECK_MODULES([GLIB], [glib-2.0])
+
+AC_OUTPUT(Makefile)

hdajacksensetest/gitcompile

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+aclocal $ACLOCAL_FLAGS || exit 1
+automake --foreign --add-missing || exit 1
+autoconf || exit 1
+export CFLAGS='-O2 -Wall -pipe -g'
+echo "CFLAGS=$CFLAGS"
+echo "./configure $@"
+./configure $@ || exit 1
+unset CFLAGS
+if [ -z "$GITCOMPILE_NO_MAKE" ]; then
+  make || exit 1
+fi

hdajacksensetest/hdajacksensetest.c

@@ -0,0 +1,146 @@
+/*
+ * Checks the current pin/jack status of the codec
+ *
+ * Copyright (c) 2014 David Henningsson, Canonical Ltd. <david.henningsson@canonical.com>
+ * (With some minor pieces copy-pasted from hda-verb by Takashi Iwai)
+ *
+ * Licensed under GPL v2 or later.
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <glib.h>
+#include <errno.h>
+#include "sysfs-pin-configs.h"
+
+#include <sys/ioctl.h>
+#include <stdint.h>
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+#include "hda_hwdep.h"
+
+gint card_index, codec_index;
+gboolean try_all_pins, set_pin_sense;
+
+static GOptionEntry arg_entries[] =
+{
+  { "card", 'c', 0, G_OPTION_ARG_INT, &card_index, "card index (as can be seen in /proc/asound/cards)", "X" },
+  { "codec", 'd', 0, G_OPTION_ARG_INT, &codec_index, "codec device index (as can be seen in /proc/asound/cardX/codecY)", "Y" },
+  { "allpins", 'a', 0, G_OPTION_ARG_NONE, &try_all_pins, "try all pins, even those who (probably) does not have a physical jack", NULL },
+  { "setpinsense", 's', 0, G_OPTION_ARG_NONE, &set_pin_sense, "execute 'Set pin sense' before the pin sense is measured", NULL },
+  { NULL }
+};
+
+static void parse_command_line(int argc, char **argv)
+{
+	GError *error = NULL;
+	GOptionContext *context = g_option_context_new("- check current jack/pin sense");
+	g_option_context_add_main_entries(context, arg_entries, NULL);
+	if (!g_option_context_parse (context, &argc, &argv, &error)) {
+		fprintf(stderr, "Option parsing failed: %s\n", error->message);
+		exit(1);
+	}
+	g_option_context_free(context);
+}
+
+
+static gboolean should_check_pin(pin_configs_t *pin)
+{
+	unsigned long defcfg = actual_pin_config(pin);
+	if (try_all_pins)
+		return TRUE;
+	if (get_port_conn(defcfg) != 0)
+		return FALSE; // Not a jack
+	if (defcfg & (1 << 8)) // Jack has NO_PRESENCE set
+		return FALSE;
+	return TRUE;
+}
+
+int fd;
+
+static void codec_open()
+{
+	char filename[64];
+	int version = 0;
+
+	snprintf(filename, 64, "/dev/snd/hwC%dD%d", card_index, codec_index);
+	fd = open(filename, O_RDWR);
+	if (fd < 0) {
+		if (errno == EACCES)
+			fprintf(stderr, "Permission error (hint: this program usually requires root)\n");
+		else
+			fprintf(stderr, "Ioctl call failed with error %d\n", errno);
+		exit(1);
+	}
+
+	if (ioctl(fd, HDA_IOCTL_PVERSION, &version) < 0) {
+		fprintf(stderr, "Ioctl call failed with error %d\n", errno);
+		fprintf(stderr, "Looks like an invalid hwdep device...\n");
+		close(fd);
+		exit(1);
+	}
+	if (version < HDA_HWDEP_VERSION) {
+		fprintf(stderr, "Invalid version number 0x%x\n", version);
+		fprintf(stderr, "Looks like an invalid hwdep device...\n");
+		close(fd);
+		exit(1);
+	}
+}
+
+static unsigned long codec_rw(int nid, int verb, int param)
+{
+	struct hda_verb_ioctl val;
+
+	val.verb = HDA_VERB(nid, verb, param);
+	if (ioctl(fd, HDA_IOCTL_VERB_WRITE, &val) < 0) {
+		fprintf(stderr, "Ioctl call failed with error %d\n", errno);
+		close(fd);
+		exit(1);
+	}
+	return val.res;
+}
+
+#define AC_VERB_GET_PIN_SENSE	0x0f09
+#define AC_VERB_SET_PIN_SENSE	0x709
+
+#define MAX_PINS 32
+
+pin_configs_t pin_configs[MAX_PINS];
+
+int main(int argc, char **argv)
+{
+	int pin_count, i;
+
+	parse_command_line(argc, argv);
+	pin_count = get_pin_configs_list(pin_configs, MAX_PINS, card_index, codec_index);
+	if (pin_count == 0) {
+		fprintf(stderr, "No pins found for card %d codec %d, did you pick the right one?\n", card_index, codec_index);
+		exit(1);
+	}
+
+	codec_open();
+
+	if (set_pin_sense) {
+		for (i = 0; i < pin_count; i++)
+			if (should_check_pin(&pin_configs[i])) {
+				codec_rw(pin_configs[i].nid, AC_VERB_SET_PIN_SENSE, 0);
+			}
+		sleep(1);
+	}
+
+	for (i = 0; i < pin_count; i++)
+		if (should_check_pin(&pin_configs[i])) {
+			gchar *desc = get_config_description(actual_pin_config(&pin_configs[i]));
+			unsigned long present = codec_rw(pin_configs[i].nid, AC_VERB_GET_PIN_SENSE, 0);
+			printf("Pin 0x%.2x (%s): present = %s\n", pin_configs[i].nid, desc, present & 0x80000000 ? "Yes" : "No");
+			g_free(desc);
+		}
+
+	close(fd);
+	return 0;
+}