build+tools: fw_content.conf 填 audiod/audio CLI md5; 新增诊断工具 sndprobe(PCM设备探测)/tonepcm2(HW_REFINE能力探测+写计时时钟验证) — 无声定位用。M2.90(0.7.85) 已打包 504bc74b 回验0diff

patch_v2/tools/sndprobe.c

@@ -0,0 +1,39 @@
+/* sndprobe.c — 探测 /dev/snd/pcmC0D{p,c}* 的 SNDRV_PCM_IOCTL_INFO（id/name/subs），
+ * 定位 R3 Pro II 耳机输出到底在哪个 PCM 设备。静态 mipsel，只读不写参数。 */
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sound/asound.h>
+
+int main(void)
+{
+    static const char *devs[] = {
+        "/dev/snd/pcmC0D0p", "/dev/snd/pcmC0D1p", "/dev/snd/pcmC0D0c", "/dev/snd/pcmC0D1c",
+    };
+    for (int i = 0; i < 4; i++) {
+        int fd = open(devs[i], O_RDWR | O_NONBLOCK);
+        if (fd < 0) { printf("%s: open fail\n", devs[i]); continue; }
+        struct snd_pcm_info info;
+        memset(&info, 0, sizeof info);
+        if (ioctl(fd, SNDRV_PCM_IOCTL_INFO, &info) == 0)
+            printf("%s: card=%d dev=%d sub=%d id=\"%s\" name=\"%s\" subname=\"%s\" subs=%u/%u\n",
+                   devs[i], info.card, info.device, info.subdevice,
+                   info.id, info.name, info.subname, info.subdevices_avail, info.subdevices_count);
+        else
+            printf("%s: INFO ioctl fail\n", devs[i]);
+        close(fd);
+    }
+    /* 控制设备：看卡名 */
+    int cf = open("/dev/snd/controlC0", O_RDONLY);
+    if (cf >= 0) {
+        struct snd_ctl_card_info ci;
+        memset(&ci, 0, sizeof ci);
+        if (ioctl(cf, SNDRV_CTL_IOCTL_CARD_INFO, &ci) == 0)
+            printf("controlC0: id=\"%s\" driver=\"%s\" name=\"%s\" longname=\"%s\"\n",
+                   ci.id, ci.driver, ci.name, ci.longname);
+        close(cf);
+    }
+    return 0;
+}