dfu: Add optional timeout parameter

When the `dfu` command is called from the U-Boot environment,
it now accepts an optional parameter that specifies a timeout (in seconds).
If a DFU connection is not made within that time the `dfu` command exits
(as it would if Ctrl+C was pressed). If the timeout is left empty or being
zero the `dfu` command behaves as it does now.

This is useful for allowing U-Boot to check to see if anything wants to
upload new firmware before continuing to boot.

The patch is based on the commit
https://github.com/01org/edison-u-boot/commit/5e966ccc3c65c18c9783741fa04e0c45e021780c
by Sebastien Colleur, which has been heavily reworked due to U-Boot changes
in the past.

Signed-off-by: Brad Campbell <bradjc5@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

diff --git a/cmd/dfu.c b/cmd/dfu.c
index 14a8ec8..b30f8a5 100644 (file)
--- a/cmd/dfu.c
+++ b/cmd/dfu.c
@@ -30,7 +30,7 @@ static int do_dfu(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 #if defined(CONFIG_DFU_OVER_USB) || defined(CONFIG_DFU_OVER_TFTP)
        char *interface = NULL;
        char *devstring = NULL;
-#if defined(CONFIG_DFU_OVER_TFTP)
+#if defined(CONFIG_DFU_TIMEOUT) || defined(CONFIG_DFU_OVER_TFTP)
        unsigned long value = 0;
 #endif
 
@@ -39,7 +39,7 @@ static int do_dfu(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
                devstring = argv[3];
        }
 
-#if defined(CONFIG_DFU_OVER_TFTP)
+#if defined(CONFIG_DFU_TIMEOUT) || defined(CONFIG_DFU_OVER_TFTP)
        if (argc == 5 || argc == 3)
                value = simple_strtoul(argv[argc - 1], NULL, 0);
 #endif
@@ -55,6 +55,10 @@ static int do_dfu(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
        if (ret)
                goto done;
 
+#ifdef CONFIG_DFU_TIMEOUT
+       dfu_set_timeout(value * 1000);
+#endif
+
        ret = CMD_RET_SUCCESS;
        if (strcmp(argv[argc - 1], "list") == 0) {
                dfu_show_entities();
@@ -75,10 +79,17 @@ U_BOOT_CMD(dfu, CONFIG_SYS_MAXARGS, 1, do_dfu,
        "Device Firmware Upgrade",
        ""
 #ifdef CONFIG_DFU_OVER_USB
+#ifdef CONFIG_DFU_TIMEOUT
+       "<USB_controller> [<interface> <dev>] [<timeout>] [list]\n"
+#else
        "<USB_controller> [<interface> <dev>] [list]\n"
+#endif
        "  - device firmware upgrade via <USB_controller>\n"
        "    on device <dev>, attached to interface\n"
        "    <interface>\n"
+#ifdef CONFIG_DFU_TIMEOUT
+       "    [<timeout>] - specify inactivity timeout in seconds\n"
+#endif
        "    [list] - list available alt settings\n"
 #endif
 #ifdef CONFIG_DFU_OVER_TFTP

diff --git a/common/dfu.c b/common/dfu.c
index 44d1484..da6289b 100644 (file)
--- a/common/dfu.c
+++ b/common/dfu.c
@@ -35,6 +35,10 @@ int run_usb_dnl_gadget(int usbctrl_index, char *usb_dnl_gadget)
                return CMD_RET_FAILURE;
        }
 
+#ifdef CONFIG_DFU_TIMEOUT
+       unsigned long start_time = get_timer(0);
+#endif
+
        while (1) {
                if (g_dnl_detach()) {
                        /*
@@ -79,6 +83,19 @@ int run_usb_dnl_gadget(int usbctrl_index, char *usb_dnl_gadget)
                        }
                }
 
+#ifdef CONFIG_DFU_TIMEOUT
+               unsigned long wait_time = dfu_get_timeout();
+
+               if (wait_time) {
+                       unsigned long current_time = get_timer(start_time);
+
+                       if (current_time > wait_time) {
+                               debug("Inactivity timeout, abort DFU\n");
+                               goto exit;
+                       }
+               }
+#endif
+
                WATCHDOG_RESET();
                usb_gadget_handle_interrupts(usbctrl_index);
        }

diff --git a/doc/README.dfu b/doc/README.dfu
index 558d347..caf1c99 100644 (file)
--- a/doc/README.dfu
+++ b/doc/README.dfu
@@ -43,6 +43,7 @@ Configuration Options:
   CONFIG_DFU_RAM
   CONFIG_DFU_SF
   CONFIG_DFU_SF_PART
+  CONFIG_DFU_TIMEOUT
   CONFIG_DFU_VIRTUAL
   CONFIG_CMD_DFU
 
@@ -70,12 +71,15 @@ Commands:
   dfu <USB_controller> [<interface> <dev>] list
     list the alternate device defined in "dfu_alt_info"
 
-  dfu <USB_controller> [<interface> <dev>]
+  dfu <USB_controller> [<interface> <dev>] [<timeout>]
     start the dfu stack on the USB instance with the selected medium
     backend and use the "dfu_alt_info" variable to configure the
     alternate setting and link each one with the medium
     The dfu command continue until receive a ^C in console or
-    a DFU detach transaction from HOST.
+    a DFU detach transaction from HOST. If CONFIG_DFU_TIMEOUT option
+    is enabled and <timeout> parameter is present in the command line,
+    the DFU operation will be aborted automatically after <timeout>
+    seconds of waiting remote to initiate DFU session.
 
   The possible values of <interface> are :
   (with <USB controller> = 0 in the dfu command example)

diff --git a/drivers/dfu/Kconfig b/drivers/dfu/Kconfig
index 75fe0a1..9709b62 100644 (file)
--- a/drivers/dfu/Kconfig
+++ b/drivers/dfu/Kconfig
@@ -23,6 +23,12 @@ config DFU_TFTP
 
          Detailed description of this feature can be found at ./doc/README.dfutftp
 
+config DFU_TIMEOUT
+       bool "Timeout waiting for DFU"
+       help
+         This option adds an optional timeout parameter for DFU which, if set,
+         will cause DFU to only wait for that many seconds before exiting.
+
 config DFU_MMC
        bool "MMC back end for DFU"
        help

diff --git a/drivers/dfu/dfu.c b/drivers/dfu/dfu.c
index 38aecd3..df50196 100644 (file)
--- a/drivers/dfu/dfu.c
+++ b/drivers/dfu/dfu.c
@@ -21,6 +21,9 @@ static LIST_HEAD(dfu_list);
 static int dfu_alt_num;
 static int alt_num_cnt;
 static struct hash_algo *dfu_hash_algo;
+#ifdef CONFIG_DFU_TIMEOUT
+static unsigned long dfu_timeout = 0;
+#endif
 
 /*
  * The purpose of the dfu_flush_callback() function is to
@@ -58,6 +61,18 @@ __weak bool dfu_usb_get_reset(void)
 #endif
 }
 
+#ifdef CONFIG_DFU_TIMEOUT
+void dfu_set_timeout(unsigned long timeout)
+{
+       dfu_timeout = timeout;
+}
+
+unsigned long dfu_get_timeout(void)
+{
+       return dfu_timeout;
+}
+#endif
+
 static int dfu_find_alt_num(const char *s)
 {
        int i = 0;

diff --git a/include/dfu.h b/include/dfu.h
index 2e3e91c..fb5260d 100644 (file)
--- a/include/dfu.h
+++ b/include/dfu.h
@@ -178,6 +178,11 @@ unsigned char *dfu_free_buf(void);
 unsigned long dfu_get_buf_size(void);
 bool dfu_usb_get_reset(void);
 
+#ifdef CONFIG_DFU_TIMEOUT
+unsigned long dfu_get_timeout(void);
+void dfu_set_timeout(unsigned long);
+#endif
+
 int dfu_read(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
 int dfu_write(struct dfu_entity *de, void *buf, int size, int blk_seq_num);
 int dfu_flush(struct dfu_entity *de, void *buf, int size, int blk_seq_num);