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 #include "f_mass_storage.c" 35 36 /* 37 * One needs to define the following: 38 * CONFIG_G_DNL_VENDOR_NUM 39 * CONFIG_G_DNL_PRODUCT_NUM 40 * CONFIG_G_DNL_MANUFACTURER 41 * at e.g. ./include/configs/<board>.h 42 */ 43 44 #define STRING_MANUFACTURER 25 45 #define STRING_PRODUCT 2 46 #define STRING_USBDOWN 2 47 #define CONFIG_USBDOWNLOADER 2 48 49 #define DRIVER_VERSION "usb_dnl 2.0" 50 51 static const char shortname[] = "usb_dnl_"; 52 static const char product[] = "USB download gadget"; 53 static const char manufacturer[] = CONFIG_G_DNL_MANUFACTURER; 54 55 static struct usb_device_descriptor device_desc = { 56 .bLength = sizeof device_desc, 57 .bDescriptorType = USB_DT_DEVICE, 58 59 .bcdUSB = __constant_cpu_to_le16(0x0200), 60 .bDeviceClass = USB_CLASS_COMM, 61 .bDeviceSubClass = 0x02, /*0x02:CDC-modem , 0x00:CDC-serial*/ 62 63 .idVendor = __constant_cpu_to_le16(CONFIG_G_DNL_VENDOR_NUM), 64 .idProduct = __constant_cpu_to_le16(CONFIG_G_DNL_PRODUCT_NUM), 65 .iProduct = STRING_PRODUCT, 66 .bNumConfigurations = 1, 67 }; 68 69 /* static strings, in UTF-8 */ 70 static struct usb_string g_dnl_string_defs[] = { 71 { 0, manufacturer, }, 72 { 1, product, }, 73 { } /* end of list */ 74 }; 75 76 static struct usb_gadget_strings g_dnl_string_tab = { 77 .language = 0x0409, /* en-us */ 78 .strings = g_dnl_string_defs, 79 }; 80 81 static struct usb_gadget_strings *g_dnl_composite_strings[] = { 82 &g_dnl_string_tab, 83 NULL, 84 }; 85 86 static int g_dnl_unbind(struct usb_composite_dev *cdev) 87 { 88 struct usb_gadget *gadget = cdev->gadget; 89 90 debug("%s: calling usb_gadget_disconnect for " 91 "controller '%s'\n", shortname, gadget->name); 92 usb_gadget_disconnect(gadget); 93 94 return 0; 95 } 96 97 static int g_dnl_do_config(struct usb_configuration *c) 98 { 99 const char *s = c->cdev->driver->name; 100 int ret = -1; 101 102 debug("%s: configuration: 0x%p composite dev: 0x%p\n", 103 __func__, c, c->cdev); 104 105 printf("GADGET DRIVER: %s\n", s); 106 if (!strcmp(s, "usb_dnl_dfu")) 107 ret = dfu_add(c); 108 else if (!strcmp(s, "usb_dnl_ums")) 109 ret = fsg_add(c); 110 111 return ret; 112 } 113 114 static int g_dnl_config_register(struct usb_composite_dev *cdev) 115 { 116 static struct usb_configuration config = { 117 .label = "usb_dnload", 118 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, 119 .bConfigurationValue = CONFIG_USBDOWNLOADER, 120 .iConfiguration = STRING_USBDOWN, 121 122 .bind = g_dnl_do_config, 123 }; 124 125 return usb_add_config(cdev, &config); 126 } 127 128 static int g_dnl_bind(struct usb_composite_dev *cdev) 129 { 130 struct usb_gadget *gadget = cdev->gadget; 131 int id, ret; 132 int gcnum; 133 134 debug("%s: gadget: 0x%p cdev: 0x%p\n", __func__, gadget, cdev); 135 136 id = usb_string_id(cdev); 137 138 if (id < 0) 139 return id; 140 g_dnl_string_defs[0].id = id; 141 device_desc.iManufacturer = id; 142 143 id = usb_string_id(cdev); 144 if (id < 0) 145 return id; 146 147 g_dnl_string_defs[1].id = id; 148 device_desc.iProduct = id; 149 150 ret = g_dnl_config_register(cdev); 151 if (ret) 152 goto error; 153 154 gcnum = usb_gadget_controller_number(gadget); 155 156 debug("gcnum: %d\n", gcnum); 157 if (gcnum >= 0) 158 device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum); 159 else { 160 debug("%s: controller '%s' not recognized\n", 161 shortname, gadget->name); 162 device_desc.bcdDevice = __constant_cpu_to_le16(0x9999); 163 } 164 165 debug("%s: calling usb_gadget_connect for " 166 "controller '%s'\n", shortname, gadget->name); 167 usb_gadget_connect(gadget); 168 169 return 0; 170 171 error: 172 g_dnl_unbind(cdev); 173 return -ENOMEM; 174 } 175 176 static struct usb_composite_driver g_dnl_driver = { 177 .name = NULL, 178 .dev = &device_desc, 179 .strings = g_dnl_composite_strings, 180 181 .bind = g_dnl_bind, 182 .unbind = g_dnl_unbind, 183 }; 184 185 int g_dnl_register(const char *type) 186 { 187 /* We only allow "dfu" atm, so 3 should be enough */ 188 static char name[sizeof(shortname) + 3]; 189 int ret; 190 191 if (!strcmp(type, "dfu")) { 192 strcpy(name, shortname); 193 strcat(name, type); 194 } else if (!strcmp(type, "ums")) { 195 strcpy(name, shortname); 196 strcat(name, type); 197 } else { 198 printf("%s: unknown command: %s\n", __func__, type); 199 return -EINVAL; 200 } 201 202 g_dnl_driver.name = name; 203 204 debug("%s: g_dnl_driver.name: %s\n", __func__, g_dnl_driver.name); 205 ret = usb_composite_register(&g_dnl_driver); 206 207 if (ret) { 208 printf("%s: failed!, error: %d\n", __func__, ret); 209 return ret; 210 } 211 212 return 0; 213 } 214 215 void g_dnl_unregister(void) 216 { 217 usb_composite_unregister(&g_dnl_driver); 218 } 219