add udev-find prog and ertm_usb_by_function to seek SillyCon Labs

a40f30db · Juan David González Cobas · 623f74da · a40f30db · a40f30db · a40f30db
Commit a40f30db authored Mar 30, 2021 by Juan David González Cobas
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Showing with 37 additions and 8 deletions

private.h libertm/private.h +1 -0

udev-find.c libertm/udev-find.c +21 -0

udev-serial.c libertm/udev-serial.c +15 -8

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--- a/libertm/private.h
+++ b/libertm/private.h
@@ -77,3 +77,4 @@ static const int ertm_ntemperatures =

 extern int ertm_get_board_config(struct ertm_status *st, struct ertm14_board_state *bs);
 extern char *ertm_find_usb_port(void);
+extern char *ertm_usb_by_function(char *func);
--- a/libertm/udev-find.c
+++ b/libertm/udev-find.c
+#include <stdio.h>
+#include <string.h>
+
+#include "private.h"
+
+int main(int argc, char *argv[])
+{
+	char *devnode;
+
+	if (argc != 2) {
+		fprintf(stderr, "usage: %s {mmc15|mmc14|wrc|wrc-console}\n", argv[0]);
+		exit(1);
+	}
+	devnode = ertm_usb_by_function(argv[1]);
+	if (devnode == NULL) {
+		fprintf(stderr, "could not find function %s\n", argv[1]);
+		exit(1);
+	}
+	printf("%s\n", devnode);
+	return 0;
+}
--- a/libertm/udev-serial.c
+++ b/libertm/udev-serial.c
@@ -70,16 +70,23 @@ char *ertm_find_usb_port(void)
 	return sl_cp2108_port[2].devnode;
 }

-static int __attribute__((__unused__)) udev_main(void)
+static char *functions[] = {
+	"mmc15",
+	"mmc14",
+	"wrc",
+	"wrc-console",
+};
+
+char *ertm_usb_by_function(char *func)
 {
 	int i;
+	int err;

-	printf("control port is %s\n", ertm_find_usb_port());
+	err = ertm_search_dongle(SILICON_LABS_ID, CP2108_UART_TO_USB, sl_cp2108_port);
+	if (err < 0)
+		return NULL;
 	for (i = 0; i < 4; i++)
-		printf("port %d:   %s  at %s\n",
-			sl_cp2108_port[i].port,
-			sl_cp2108_port[i].devnode,
-			sl_cp2108_port[i].symlink);
-
-	return 0;
+		if (strcmp(func, functions[i]) == 0)
+			return sl_cp2108_port[i].devnode;
+	return NULL;
 }