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 struct usb_gadget *gadget = cdev->gadget; 87 88 debug("%s: calling usb_gadget_disconnect for " 89 "controller '%s'\n", shortname, gadget->name); 90 usb_gadget_disconnect(gadget); 91 92 return 0; 93 } 94 95 static int g_dnl_do_config(struct usb_configuration *c) 96 { 97 const char *s = c->cdev->driver->name; 98 int ret = -1; 99 100 debug("%s: configuration: 0x%p composite dev: 0x%p\n", 101 __func__, c, c->cdev); 102 103 printf("GADGET DRIVER: %s\n", s); 104 if (!strcmp(s, "usb_dnl_dfu")) 105 ret = dfu_add(c); 106 107 return ret; 108 } 109 110 static int g_dnl_config_register(struct usb_composite_dev *cdev) 111 { 112 static struct usb_configuration config = { 113 .label = "usb_dnload", 114 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, 115 .bConfigurationValue = CONFIG_USBDOWNLOADER, 116 .iConfiguration = STRING_USBDOWN, 117 118 .bind = g_dnl_do_config, 119 }; 120 121 return usb_add_config(cdev, &config); 122 } 123 124 static int g_dnl_bind(struct usb_composite_dev *cdev) 125 { 126 struct usb_gadget *gadget = cdev->gadget; 127 int id, ret; 128 int gcnum; 129 130 debug("%s: gadget: 0x%p cdev: 0x%p\n", __func__, gadget, cdev); 131 132 id = usb_string_id(cdev); 133 134 if (id < 0) 135 return id; 136 g_dnl_string_defs[0].id = id; 137 device_desc.iManufacturer = id; 138 139 id = usb_string_id(cdev); 140 if (id < 0) 141 return id; 142 143 g_dnl_string_defs[1].id = id; 144 device_desc.iProduct = id; 145 146 ret = g_dnl_config_register(cdev); 147 if (ret) 148 goto error; 149 150 gcnum = usb_gadget_controller_number(gadget); 151 152 debug("gcnum: %d\n", gcnum); 153 if (gcnum >= 0) 154 device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum); 155 else { 156 debug("%s: controller '%s' not recognized\n", 157 shortname, gadget->name); 158 device_desc.bcdDevice = __constant_cpu_to_le16(0x9999); 159 } 160 161 debug("%s: calling usb_gadget_connect for " 162 "controller '%s'\n", shortname, gadget->name); 163 usb_gadget_connect(gadget); 164 165 return 0; 166 167 error: 168 g_dnl_unbind(cdev); 169 return -ENOMEM; 170 } 171 172 static struct usb_composite_driver g_dnl_driver = { 173 .name = NULL, 174 .dev = &device_desc, 175 .strings = g_dnl_composite_strings, 176 177 .bind = g_dnl_bind, 178 .unbind = g_dnl_unbind, 179 }; 180 181 int g_dnl_register(const char *type) 182 { 183 /* We only allow "dfu" atm, so 3 should be enough */ 184 static char name[sizeof(shortname) + 3]; 185 int ret; 186 187 if (!strcmp(type, "dfu")) { 188 strcpy(name, shortname); 189 strcat(name, type); 190 } else { 191 printf("%s: unknown command: %s\n", __func__, type); 192 return -EINVAL; 193 } 194 195 g_dnl_driver.name = name; 196 197 debug("%s: g_dnl_driver.name: %s\n", __func__, g_dnl_driver.name); 198 ret = usb_composite_register(&g_dnl_driver); 199 200 if (ret) { 201 printf("%s: failed!, error: %d\n", __func__, ret); 202 return ret; 203 } 204 205 return 0; 206 } 207 208 void g_dnl_unregister(void) 209 { 210 usb_composite_unregister(&g_dnl_driver); 211 } 212