Revert "Import files from .tar.gz that are missing from upstream git repo."

test/test-pad.c

+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+int
+getbyte(int fd, unsigned char *b)
+{
+    return(read(fd, b, 1) == 1);
+}
+
+int
+putbyte(int fd, unsigned char b)
+{
+    unsigned char ack;
+
+    printf("write %02X\n", b);
+    if (write(fd, &b, 1) != 1) {
+        fprintf(stderr, "error write: %s\n", strerror(errno));
+        return 0;
+    }
+
+    if (!getbyte(fd, &ack)) {
+        fprintf(stderr, "error read: %s\n", strerror(errno));
+        return 0;
+    }
+    printf("read %02X\n", ack);
+
+    if (ack != 0xFA) {
+        fprintf(stderr, "error ack\n");
+        return 0;
+    }
+
+    return 1;
+}
+
+int
+special_cmd(int fd, unsigned char cmd)
+{
+    int i;
+
+    if (putbyte(fd, 0xE6))
+        for (i = 0; i < 4; i++) {
+            printf("special_cmd %i\n", i);
+            if ((!putbyte(fd, 0xE8)) || (!putbyte(fd, (cmd>>6)&0x3)))
+                return 0;
+            cmd<<=2;
+        }
+    else
+        return 0;
+    return 1;
+}
+
+int
+send_cmd(int fd, unsigned char cmd)
+{
+    return (special_cmd(fd, cmd) &&
+            putbyte(fd, 0xE9));
+}
+
+int
+identify(int fd, unsigned long int *ident)
+{
+    unsigned char id[3];
+
+    if (send_cmd(fd, 0x00) &&
+        getbyte(fd, &id[0]) &&
+        getbyte(fd, &id[1]) &&
+        getbyte(fd, &id[2])) {
+        *ident = (id[0]<<16)|(id[1]<<8)|id[2];
+        printf("ident %06X\n", *ident);
+        return 1;
+    } else {
+        fprintf(stderr, "error identify\n");
+        return 0;
+    }
+}
+
+int
+reset(int fd)
+{
+    unsigned char r[2];
+
+    if (!putbyte(fd, 0xFF)) {
+        fprintf(stderr, "error reset\n");
+        return 0;
+    }
+
+    sleep(5);
+
+    if (getbyte(fd, &r[0]) && getbyte(fd, &r[1]))
+        if (r[0] == 0xAA && r[1] == 0x00) {
+            fprintf(stderr, "reset done\n");
+            return 1;
+        }
+    fprintf(stderr, "error reset ack\n");
+    return 0;
+}
+
+int
+main(int argc, char* argv[])
+{
+    int fd;
+    unsigned long int ident;
+
+    fd = open("/dev/psaux", O_RDWR);
+    if (fd == -1) {
+        fprintf(stderr, "error open: %s\n", strerror(errno));
+        exit(0);
+    }
+
+    reset(fd);
+    identify(fd, &ident);
+
+    close(fd);
+
+    exit(0);
+}