serial gadget: enable/disable on request

- add a usbserial command to enable/disable the serial gadget
- allow dfu and usbserial to cohexist in the same barebox
- add a timeout in u_serial so that we don't get locked if the user
enable usbserial from a UART console but doesn't consume the data
on the usbserial port created on the PC
- remove debug or verbose printf
- tested on i.MX25 & i.MX35 & usb-a926x

Signed-off-by: Eric Bénard <eric@eukrea.com>
Tested-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 109 insertions, 0 deletions

diff --git a/commands/Makefile b/commands/Makefile
index 24753be80d..43630e1274 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -47,6 +47,7 @@ obj-$(CONFIG_CMD_LSMOD)		+= lsmod.o
 obj-$(CONFIG_CMD_INSMOD)	+= insmod.o
 obj-$(CONFIG_CMD_BMP)		+= bmp.o
 obj-$(CONFIG_USB_GADGET_DFU)	+= dfu.o
+obj-$(CONFIG_USB_GADGET_SERIAL)	+= usbserial.o
 obj-$(CONFIG_CMD_GPIO)		+= gpio.o
 obj-$(CONFIG_CMD_UNCOMPRESS)	+= uncompress.o
 obj-$(CONFIG_CMD_I2C)		+= i2c.o
diff --git a/commands/usbserial.c b/commands/usbserial.c
new file mode 100644
index 0000000000..eb31934d76
--- /dev/null
+++ b/commands/usbserial.c
@@ -0,0 +1,108 @@
+/*
+ * usbserial.c - usb serial gadget command
+ *
+ * Copyright (c) 2011 Eric Bénard <eric@eukrea.com>, Eukréa Electromatique
+ * based on dfu.c which is :
+ * Copyright (c) 2009 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include <common.h>
+#include <command.h>
+#include <errno.h>
+#include <malloc.h>
+#include <getopt.h>
+#include <fs.h>
+#include <xfuncs.h>
+#include <usb/usbserial.h>
+
+static int do_usbserial(struct command *cmdtp, int argc, char *argv[])
+{
+	int opt;
+	struct usb_serial_pdata pdata;
+	char *argstr;
+	char *manufacturer = "barebox";
+	char *productname = CONFIG_BOARDINFO;
+	u16 idVendor = 0, idProduct = 0;
+	int mode = 0;
+
+	while ((opt = getopt(argc, argv, "m:p:V:P:asd")) > 0) {
+		switch (opt) {
+		case 'm':
+			manufacturer = optarg;
+			break;
+		case 'p':
+			productname = optarg;
+			break;
+		case 'V':
+			idVendor = simple_strtoul(optarg, NULL, 0);
+			break;
+		case 'P':
+			idProduct = simple_strtoul(optarg, NULL, 0);
+			break;
+		case 'a':
+			mode = 0;
+			break;
+#ifdef HAVE_OBEX
+		case 'o':
+			mode = 1;
+			break;
+#endif
+		case 's':
+			mode = 2;
+			break;
+		case 'd':
+			usb_serial_unregister();
+			return 0;
+		}
+	}
+
+	argstr = argv[optind];
+
+	pdata.manufacturer = manufacturer;
+	pdata.productname = productname;
+	pdata.idVendor = idVendor;
+	pdata.idProduct = idProduct;
+	pdata.mode = mode;
+
+	return usb_serial_register(&pdata);
+}
+
+BAREBOX_CMD_HELP_START(usbserial)
+BAREBOX_CMD_HELP_USAGE("usbserial [OPTIONS] <description>\n")
+BAREBOX_CMD_HELP_SHORT("Enable/disable a serial gadget on the USB device interface.\n")
+BAREBOX_CMD_HELP_OPT  ("-m <str>",  "Manufacturer string (barebox)\n")
+BAREBOX_CMD_HELP_OPT  ("-p <str>",  "product string (" CONFIG_BOARDINFO ")\n")
+BAREBOX_CMD_HELP_OPT  ("-V <id>",   "vendor id\n")
+BAREBOX_CMD_HELP_OPT  ("-P <id>",   "product id\n")
+BAREBOX_CMD_HELP_OPT  ("-a",   "CDC ACM (default)\n")
+#ifdef HAVE_OBEX
+BAREBOX_CMD_HELP_OPT  ("-o",   "CDC OBEX\n")
+#endif
+BAREBOX_CMD_HELP_OPT  ("-s",   "Generic Serial\n")
+BAREBOX_CMD_HELP_OPT  ("-d",   "Disable the serial gadget\n")
+BAREBOX_CMD_HELP_END
+
+/**
+ * @page usbserial_command
+ */
+
+BAREBOX_CMD_START(usbserial)
+	.cmd		= do_usbserial,
+	.usage		= "Serial gadget enable/disable",
+	BAREBOX_CMD_HELP(cmd_usbserial_help)
+BAREBOX_CMD_END