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 { } /* end of list */ 73 }; 74 75 static struct usb_gadget_strings g_dnl_string_tab = { 76 .language = 0x0409, /* en-us */ 77 .strings = g_dnl_string_defs, 78 }; 79 80 static struct usb_gadget_strings *g_dnl_composite_strings[] = { 81 &g_dnl_string_tab, 82 NULL, 83 }; 84 85 static int g_dnl_unbind(struct usb_composite_dev *cdev) 86 { 87 struct usb_gadget *gadget = cdev->gadget; 88 89 debug("%s: calling usb_gadget_disconnect for " 90 "controller '%s'\n", shortname, gadget->name); 91 usb_gadget_disconnect(gadget); 92 93 return 0; 94 } 95 96 static int g_dnl_do_config(struct usb_configuration *c) 97 { 98 const char *s = c->cdev->driver->name; 99 int ret = -1; 100 101 debug("%s: configuration: 0x%p composite dev: 0x%p\n", 102 __func__, c, c->cdev); 103 104 printf("GADGET DRIVER: %s\n", s); 105 if (!strcmp(s, "usb_dnl_dfu")) 106 ret = dfu_add(c); 107 108 return ret; 109 } 110 111 static int g_dnl_config_register(struct usb_composite_dev *cdev) 112 { 113 static struct usb_configuration config = { 114 .label = "usb_dnload", 115 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, 116 .bConfigurationValue = CONFIG_USBDOWNLOADER, 117 .iConfiguration = STRING_USBDOWN, 118 119 .bind = g_dnl_do_config, 120 }; 121 122 return usb_add_config(cdev, &config); 123 } 124 125 static int g_dnl_bind(struct usb_composite_dev *cdev) 126 { 127 struct usb_gadget *gadget = cdev->gadget; 128 int id, ret; 129 int gcnum; 130 131 debug("%s: gadget: 0x%p cdev: 0x%p\n", __func__, gadget, cdev); 132 133 id = usb_string_id(cdev); 134 135 if (id < 0) 136 return id; 137 g_dnl_string_defs[0].id = id; 138 device_desc.iManufacturer = id; 139 140 id = usb_string_id(cdev); 141 if (id < 0) 142 return id; 143 144 g_dnl_string_defs[1].id = id; 145 device_desc.iProduct = id; 146 147 ret = g_dnl_config_register(cdev); 148 if (ret) 149 goto error; 150 151 gcnum = usb_gadget_controller_number(gadget); 152 153 debug("gcnum: %d\n", gcnum); 154 if (gcnum >= 0) 155 device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum); 156 else { 157 debug("%s: controller '%s' not recognized\n", 158 shortname, gadget->name); 159 device_desc.bcdDevice = __constant_cpu_to_le16(0x9999); 160 } 161 162 debug("%s: calling usb_gadget_connect for " 163 "controller '%s'\n", shortname, gadget->name); 164 usb_gadget_connect(gadget); 165 166 return 0; 167 168 error: 169 g_dnl_unbind(cdev); 170 return -ENOMEM; 171 } 172 173 static struct usb_composite_driver g_dnl_driver = { 174 .name = NULL, 175 .dev = &device_desc, 176 .strings = g_dnl_composite_strings, 177 178 .bind = g_dnl_bind, 179 .unbind = g_dnl_unbind, 180 }; 181 182 int g_dnl_register(const char *type) 183 { 184 /* We only allow "dfu" atm, so 3 should be enough */ 185 static char name[sizeof(shortname) + 3]; 186 int ret; 187 188 if (!strcmp(type, "dfu")) { 189 strcpy(name, shortname); 190 strcat(name, type); 191 } else { 192 printf("%s: unknown command: %s\n", __func__, type); 193 return -EINVAL; 194 } 195 196 g_dnl_driver.name = name; 197 198 debug("%s: g_dnl_driver.name: %s\n", __func__, g_dnl_driver.name); 199 ret = usb_composite_register(&g_dnl_driver); 200 201 if (ret) { 202 printf("%s: failed!, error: %d\n", __func__, ret); 203 return ret; 204 } 205 206 return 0; 207 } 208 209 void g_dnl_unregister(void) 210 { 211 usb_composite_unregister(&g_dnl_driver); 212 } 213