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/*
* g_dnl.c -- USB Downloader Gadget
*
* Copyright (C) 2012 Samsung Electronics
* Lukasz Majewski <l.majewski@samsung.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <malloc.h>
#include <mmc.h>
#include <part.h>
#include <g_dnl.h>
#include <usb_mass_storage.h>
#include <dfu.h>
#include "gadget_chips.h"
#include "composite.c"
/*
* One needs to define the following:
* CONFIG_G_DNL_VENDOR_NUM
* CONFIG_G_DNL_PRODUCT_NUM
* CONFIG_G_DNL_MANUFACTURER
* at e.g. ./include/configs/<board>.h
*/
#define STRING_MANUFACTURER 25
#define STRING_PRODUCT 2
/* Index of String Descriptor describing this configuration */
#define STRING_USBDOWN 2
/* Number of supported configurations */
#define CONFIGURATION_NUMBER 1
#define DRIVER_VERSION "usb_dnl 2.0"
static const char shortname[] = "usb_dnl_";
static const char product[] = "USB download gadget";
static const char manufacturer[] = CONFIG_G_DNL_MANUFACTURER;
static struct usb_device_descriptor device_desc = {
.bLength = sizeof device_desc,
.bDescriptorType = USB_DT_DEVICE,
.bcdUSB = __constant_cpu_to_le16(0x0200),
.bDeviceClass = USB_CLASS_COMM,
.bDeviceSubClass = 0x02, /*0x02:CDC-modem , 0x00:CDC-serial*/
.idVendor = __constant_cpu_to_le16(CONFIG_G_DNL_VENDOR_NUM),
.idProduct = __constant_cpu_to_le16(CONFIG_G_DNL_PRODUCT_NUM),
.iProduct = STRING_PRODUCT,
.bNumConfigurations = 1,
};
/*
* static strings, in UTF-8
* IDs for those strings are assigned dynamically at g_dnl_bind()
*/
static struct usb_string g_dnl_string_defs[] = {
{.s = manufacturer},
{.s = product},
{ } /* end of list */
};
static struct usb_gadget_strings g_dnl_string_tab = {
.language = 0x0409, /* en-us */
.strings = g_dnl_string_defs,
};
static struct usb_gadget_strings *g_dnl_composite_strings[] = {
&g_dnl_string_tab,
NULL,
};
static int g_dnl_unbind(struct usb_composite_dev *cdev)
{
struct usb_gadget *gadget = cdev->gadget;
debug("%s: calling usb_gadget_disconnect for "
"controller '%s'\n", shortname, gadget->name);
usb_gadget_disconnect(gadget);
return 0;
}
static int g_dnl_do_config(struct usb_configuration *c)
{
const char *s = c->cdev->driver->name;
int ret = -1;
debug("%s: configuration: 0x%p composite dev: 0x%p\n",
__func__, c, c->cdev);
printf("GADGET DRIVER: %s\n", s);
if (!strcmp(s, "usb_dnl_dfu"))
ret = dfu_add(c);
else if (!strcmp(s, "usb_dnl_ums"))
ret = fsg_add(c);
return ret;
}
static int g_dnl_config_register(struct usb_composite_dev *cdev)
{
static struct usb_configuration config = {
.label = "usb_dnload",
.bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
.bConfigurationValue = CONFIGURATION_NUMBER,
.iConfiguration = STRING_USBDOWN,
.bind = g_dnl_do_config,
};
return usb_add_config(cdev, &config);
}
__weak
int g_dnl_bind_fixup(struct usb_device_descriptor *dev)
{
return 0;
}
static int g_dnl_bind(struct usb_composite_dev *cdev)
{
struct usb_gadget *gadget = cdev->gadget;
int id, ret;
int gcnum;
debug("%s: gadget: 0x%p cdev: 0x%p\n", __func__, gadget, cdev);
id = usb_string_id(cdev);
if (id < 0)
return id;
g_dnl_string_defs[0].id = id;
device_desc.iManufacturer = id;
id = usb_string_id(cdev);
if (id < 0)
return id;
g_dnl_string_defs[1].id = id;
device_desc.iProduct = id;
g_dnl_bind_fixup(&device_desc);
ret = g_dnl_config_register(cdev);
if (ret)
goto error;
gcnum = usb_gadget_controller_number(gadget);
debug("gcnum: %d\n", gcnum);
if (gcnum >= 0)
device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum);
else {
debug("%s: controller '%s' not recognized\n",
shortname, gadget->name);
device_desc.bcdDevice = __constant_cpu_to_le16(0x9999);
}
debug("%s: calling usb_gadget_connect for "
"controller '%s'\n", shortname, gadget->name);
usb_gadget_connect(gadget);
return 0;
error:
g_dnl_unbind(cdev);
return -ENOMEM;
}
static struct usb_composite_driver g_dnl_driver = {
.name = NULL,
.dev = &device_desc,
.strings = g_dnl_composite_strings,
.bind = g_dnl_bind,
.unbind = g_dnl_unbind,
};
int g_dnl_register(const char *type)
{
/* We only allow "dfu" atm, so 3 should be enough */
static char name[sizeof(shortname) + 3];
int ret;
if (!strcmp(type, "dfu")) {
strcpy(name, shortname);
strcat(name, type);
} else if (!strcmp(type, "ums")) {
strcpy(name, shortname);
strcat(name, type);
} else {
printf("%s: unknown command: %s\n", __func__, type);
return -EINVAL;
}
g_dnl_driver.name = name;
debug("%s: g_dnl_driver.name: %s\n", __func__, g_dnl_driver.name);
ret = usb_composite_register(&g_dnl_driver);
if (ret) {
printf("%s: failed!, error: %d\n", __func__, ret);
return ret;
}
return 0;
}
void g_dnl_unregister(void)
{
usb_composite_unregister(&g_dnl_driver);
}
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