[U-Boot,v2,3/5] usb, g_dnl: make iSerialNumber board configurable

add the possibility to set the iSerialNumber board specific.
Default value for iSerialNumber is 0x0. This value can
changed board specific through the new function
g_dnl_set_serialnumber() which must be called from the
board specific function g_dnl_bind_fixup().

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>

---
changes for v2:
- as Lukasz Majewski suggested, remove CONFIG_G_DNL_SERIAL_STRING
  define
---
 drivers/usb/gadget/g_dnl.c | 20 ++++++++++++++++++++
 include/g_dnl.h            |  1 +
 2 files changed, 21 insertions(+)

Hi Heiko,

> add the possibility to set the iSerialNumber board specific.
> Default value for iSerialNumber is 0x0. This value can
> changed board specific through the new function
> g_dnl_set_serialnumber() which must be called from the
> board specific function g_dnl_bind_fixup().
> 
> Signed-off-by: Heiko Schocher <hs@denx.de>
> Cc: Marek Vasut <marek.vasut@gmail.com>
> Cc: Lukasz Majewski <l.majewski@samsung.com>
> Cc: Kyungmin Park <kyungmin.park@samsung.com>
> 

I tried to apply the patch to the newest origin/master (SHA1:
509dca7a11aad394d781a9d31a7bfa6692562741).

Unfortunately it failed due to some previous patches applied to g_dnl.c
file.

Please rebase on top of origin/master

> ---
> changes for v2:
> - as Lukasz Majewski suggested, remove CONFIG_G_DNL_SERIAL_STRING
>   define
> ---
>  drivers/usb/gadget/g_dnl.c | 20 ++++++++++++++++++++
>  include/g_dnl.h            |  1 +
>  2 files changed, 21 insertions(+)
> 
> diff --git a/drivers/usb/gadget/g_dnl.c b/drivers/usb/gadget/g_dnl.c
> index 40868c0..7a3d507 100644
> --- a/drivers/usb/gadget/g_dnl.c
> +++ b/drivers/usb/gadget/g_dnl.c
> @@ -32,6 +32,9 @@
>  #define STRING_PRODUCT 2
>  /* Index of String Descriptor describing this configuration */
>  #define STRING_USBDOWN 2
> +/* Index of String serial */
> +#define STRING_SERIAL  3
> +#define MAX_STRING_SERIAL	32
>  /* Number of supported configurations */
>  #define CONFIGURATION_NUMBER 1
>  
> @@ -39,8 +42,16 @@
>  
>  static const char shortname[] = "usb_dnl_";
>  static const char product[] = "USB download gadget";
> +static char g_dnl_serial[MAX_STRING_SERIAL];
>  static const char manufacturer[] = CONFIG_G_DNL_MANUFACTURER;
>  
> +void g_dnl_set_serialnumber(char *s)
> +{
> +	memset(g_dnl_serial, 0, MAX_STRING_SERIAL);
> +	if (strlen(s) < MAX_STRING_SERIAL)
> +		strncpy(g_dnl_serial, s, strlen(s));
> +}
> +
>  static struct usb_device_descriptor device_desc = {
>  	.bLength = sizeof device_desc,
>  	.bDescriptorType = USB_DT_DEVICE,
> @@ -52,6 +63,7 @@ static struct usb_device_descriptor device_desc = {
>  	.idVendor = __constant_cpu_to_le16(CONFIG_G_DNL_VENDOR_NUM),
>  	.idProduct =
> __constant_cpu_to_le16(CONFIG_G_DNL_PRODUCT_NUM), .iProduct =
> STRING_PRODUCT,
> +	.iSerialNumber = STRING_SERIAL,
>  	.bNumConfigurations = 1,
>  };
>  
> @@ -62,6 +74,7 @@ static struct usb_device_descriptor device_desc = {
>  static struct usb_string g_dnl_string_defs[] = {
>  	{.s = manufacturer},
>  	{.s = product},
> +	{.s = g_dnl_serial},
>  	{ }		/* end of list */
>  };
>  
> @@ -145,6 +158,13 @@ static int g_dnl_bind(struct usb_composite_dev
> *cdev) g_dnl_string_defs[1].id = id;
>  	device_desc.iProduct = id;
>  
> +	id = usb_string_id(cdev);
> +	if (id < 0)
> +		return id;
> +
> +	g_dnl_string_defs[2].id = id;
> +	device_desc.iSerialNumber = id;
> +
>  	g_dnl_bind_fixup(&device_desc);
>  	ret = g_dnl_config_register(cdev);
>  	if (ret)
> diff --git a/include/g_dnl.h b/include/g_dnl.h
> index 2b2f11a..be3114f 100644
> --- a/include/g_dnl.h
> +++ b/include/g_dnl.h
> @@ -13,6 +13,7 @@
>  int g_dnl_bind_fixup(struct usb_device_descriptor *);
>  int g_dnl_register(const char *s);
>  void g_dnl_unregister(void);
> +void g_dnl_set_serialnumber(char *);
>  
>  /* USB initialization declaration - board specific */
>  void board_usb_init(void);