1 /* 2 * g_dnl.c -- USB Downloader Gadget 3 * 4 * Copyright (C) 2012 Samsung Electronics 5 * Lukasz Majewski <l.majewski@samsung.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 */ 21 22 #include <errno.h> 23 #include <common.h> 24 #include <malloc.h> 25 26 #include <mmc.h> 27 #include <part.h> 28 29 #include <g_dnl.h> 30 #include "f_dfu.h" 31 32 #include "gadget_chips.h" 33 #include "composite.c" 34 35 /* 36 * One needs to define the following: 37 * CONFIG_G_DNL_VENDOR_NUM 38 * CONFIG_G_DNL_PRODUCT_NUM 39 * CONFIG_G_DNL_MANUFACTURER 40 * at e.g. ./include/configs/<board>.h 41 */ 42 43 #define STRING_MANUFACTURER 25 44 #define STRING_PRODUCT 2 45 #define STRING_USBDOWN 2 46 #define CONFIG_USBDOWNLOADER 2 47 48 #define DRIVER_VERSION "usb_dnl 2.0" 49 50 static const char shortname[] = "usb_dnl_"; 51 static const char product[] = "USB download gadget"; 52 static const char manufacturer[] = CONFIG_G_DNL_MANUFACTURER; 53 54 static struct usb_device_descriptor device_desc = { 55 .bLength = sizeof device_desc, 56 .bDescriptorType = USB_DT_DEVICE, 57 58 .bcdUSB = __constant_cpu_to_le16(0x0200), 59 .bDeviceClass = USB_CLASS_COMM, 60 .bDeviceSubClass = 0x02, /*0x02:CDC-modem , 0x00:CDC-serial*/ 61 62 .idVendor = __constant_cpu_to_le16(CONFIG_G_DNL_VENDOR_NUM), 63 .idProduct = __constant_cpu_to_le16(CONFIG_G_DNL_PRODUCT_NUM), 64 .iProduct = STRING_PRODUCT, 65 .bNumConfigurations = 1, 66 }; 67 68 /* static strings, in UTF-8 */ 69 static struct usb_string g_dnl_string_defs[] = { 70 { 0, manufacturer, }, 71 { 1, product, }, 72 }; 73 74 static struct usb_gadget_strings g_dnl_string_tab = { 75 .language = 0x0409, /* en-us */ 76 .strings = g_dnl_string_defs, 77 }; 78 79 static struct usb_gadget_strings *g_dnl_composite_strings[] = { 80 &g_dnl_string_tab, 81 NULL, 82 }; 83 84 static int g_dnl_unbind(struct usb_composite_dev *cdev) 85 { 86 debug("%s\n", __func__); 87 return 0; 88 } 89 90 static int g_dnl_do_config(struct usb_configuration *c) 91 { 92 const char *s = c->cdev->driver->name; 93 int ret = -1; 94 95 debug("%s: configuration: 0x%p composite dev: 0x%p\n", 96 __func__, c, c->cdev); 97 98 printf("GADGET DRIVER: %s\n", s); 99 if (!strcmp(s, "usb_dnl_dfu")) 100 ret = dfu_add(c); 101 102 return ret; 103 } 104 105 static int g_dnl_config_register(struct usb_composite_dev *cdev) 106 { 107 static struct usb_configuration config = { 108 .label = "usb_dnload", 109 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, 110 .bConfigurationValue = CONFIG_USBDOWNLOADER, 111 .iConfiguration = STRING_USBDOWN, 112 113 .bind = g_dnl_do_config, 114 }; 115 116 return usb_add_config(cdev, &config); 117 } 118 119 static int g_dnl_bind(struct usb_composite_dev *cdev) 120 { 121 struct usb_gadget *gadget = cdev->gadget; 122 int id, ret; 123 int gcnum; 124 125 debug("%s: gadget: 0x%p cdev: 0x%p\n", __func__, gadget, cdev); 126 127 id = usb_string_id(cdev); 128 129 if (id < 0) 130 return id; 131 g_dnl_string_defs[0].id = id; 132 device_desc.iManufacturer = id; 133 134 id = usb_string_id(cdev); 135 if (id < 0) 136 return id; 137 138 g_dnl_string_defs[1].id = id; 139 device_desc.iProduct = id; 140 141 ret = g_dnl_config_register(cdev); 142 if (ret) 143 goto error; 144 145 gcnum = usb_gadget_controller_number(gadget); 146 147 debug("gcnum: %d\n", gcnum); 148 if (gcnum >= 0) 149 device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum); 150 else { 151 debug("%s: controller '%s' not recognized\n", 152 shortname, gadget->name); 153 device_desc.bcdDevice = __constant_cpu_to_le16(0x9999); 154 } 155 156 return 0; 157 158 error: 159 g_dnl_unbind(cdev); 160 return -ENOMEM; 161 } 162 163 static struct usb_composite_driver g_dnl_driver = { 164 .name = NULL, 165 .dev = &device_desc, 166 .strings = g_dnl_composite_strings, 167 168 .bind = g_dnl_bind, 169 .unbind = g_dnl_unbind, 170 }; 171 172 int g_dnl_register(const char *type) 173 { 174 /* We only allow "dfu" atm, so 3 should be enough */ 175 static char name[sizeof(shortname) + 3]; 176 int ret; 177 178 if (!strcmp(type, "dfu")) { 179 strcpy(name, shortname); 180 strcat(name, type); 181 } else { 182 printf("%s: unknown command: %s\n", __func__, type); 183 return -EINVAL; 184 } 185 186 g_dnl_driver.name = name; 187 188 debug("%s: g_dnl_driver.name: %s\n", __func__, g_dnl_driver.name); 189 ret = usb_composite_register(&g_dnl_driver); 190 191 if (ret) { 192 printf("%s: failed!, error: %d\n", __func__, ret); 193 return ret; 194 } 195 196 return 0; 197 } 198 199 void g_dnl_unregister(void) 200 { 201 usb_composite_unregister(&g_dnl_driver); 202 } 203