Composite USB download gadget support (g_dnl) for download functions. This code works on top of composite gadget.
Signed-off-by: Lukasz Majewski l.majewski@samsung.com Signed-off-by: Kyungmin Park kyungmin.park@samsung.com Cc: Marek Vasut marex@denx.de
--- Changes for v2:
- G_DNL_{VENDOR_NUM, PRODUCT_NUM and MANUFACTURER} defined at ./include/configs/<board>.h - Suspend and resume stub methods removed - '\0' repleaced with plain 0
Changes for v3: - Remove unused #includes - Replace strncpy and strncat with strcpy and strcat. It was possible due to new approach to g_dnl name generation (at g_dnl_register function) - Rename the g_dnl_{init|cleanup} to g_dnl_{register|unregister} - Replace the G_DNL_* CONFIG_G_DNL_*
Changes for v4: - Remove unnecessary otg calls - odin prefix replaced with g_dnl - Single space indentation between type and variable name --- drivers/usb/gadget/Makefile | 1 + drivers/usb/gadget/g_dnl.c | 202 +++++++++++++++++++++++++++++++++++++++++++ include/g_dnl.h | 33 +++++++ 3 files changed, 236 insertions(+), 0 deletions(-) create mode 100644 drivers/usb/gadget/g_dnl.c create mode 100644 include/g_dnl.h
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile index 87d1918..2c067c8 100644 --- a/drivers/usb/gadget/Makefile +++ b/drivers/usb/gadget/Makefile @@ -29,6 +29,7 @@ LIB := $(obj)libusb_gadget.o ifdef CONFIG_USB_GADGET COBJS-y += epautoconf.o config.o usbstring.o COBJS-$(CONFIG_USB_GADGET_S3C_UDC_OTG) += s3c_udc_otg.o +COBJS-$(CONFIG_USBDOWNLOAD_GADGET) += g_dnl.o endif ifdef CONFIG_USB_ETHER COBJS-y += ether.o epautoconf.o config.o usbstring.o diff --git a/drivers/usb/gadget/g_dnl.c b/drivers/usb/gadget/g_dnl.c new file mode 100644 index 0000000..7d87050 --- /dev/null +++ b/drivers/usb/gadget/g_dnl.c @@ -0,0 +1,202 @@ +/* + * g_dnl.c -- USB Downloader Gadget + * + * Copyright (C) 2012 Samsung Electronics + * Lukasz Majewski l.majewski@samsung.com + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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 <errno.h> +#include <common.h> +#include <malloc.h> + +#include <mmc.h> +#include <part.h> + +#include <g_dnl.h> +#include "f_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 +#define STRING_USBDOWN 2 +#define CONFIG_USBDOWNLOADER 2 + +#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 */ +static struct usb_string g_dnl_string_defs[] = { + { 0, manufacturer, }, + { 1, product, }, +}; + +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) +{ + debug("%s\n", __func__); + 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); + + 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 = CONFIG_USBDOWNLOADER, + .iConfiguration = STRING_USBDOWN, + + .bind = g_dnl_do_config, + }; + + return usb_add_config(cdev, &config); +} + +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; + + 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); + } + + 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 { + 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); +} diff --git a/include/g_dnl.h b/include/g_dnl.h new file mode 100644 index 0000000..0ec7440 --- /dev/null +++ b/include/g_dnl.h @@ -0,0 +1,33 @@ +/* + * Copyright (C) 2012 Samsung Electronics + * Lukasz Majewski l.majewski@samsung.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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 + */ + +#ifndef __G_DOWNLOAD_H_ +#define __G_DOWNLOAD_H_ + +#include <linux/usb/ch9.h> +#include <usbdescriptors.h> +#include <linux/usb/gadget.h> + +int g_dnl_register(const char *s); +void g_dnl_unregister(void); + +/* USB initialization declaration - board specific */ +void board_usb_init(void); +#endif /* __G_DOWNLOAD_H_ */