1 /* 2 * g_dnl.c -- USB Downloader Gadget 3 * 4 * Copyright (C) 2012 Samsung Electronics 5 * Lukasz Majewski <l.majewski@samsung.com> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <errno.h> 11 #include <common.h> 12 #include <malloc.h> 13 14 #include <mmc.h> 15 #include <part.h> 16 17 #include <g_dnl.h> 18 #include "f_dfu.h" 19 20 #include "gadget_chips.h" 21 #include "composite.c" 22 #include "f_mass_storage.c" 23 24 /* 25 * One needs to define the following: 26 * CONFIG_G_DNL_VENDOR_NUM 27 * CONFIG_G_DNL_PRODUCT_NUM 28 * CONFIG_G_DNL_MANUFACTURER 29 * at e.g. ./include/configs/<board>.h 30 */ 31 32 #define STRING_MANUFACTURER 25 33 #define STRING_PRODUCT 2 34 /* Index of String Descriptor describing this configuration */ 35 #define STRING_USBDOWN 2 36 /* Number of supported configurations */ 37 #define CONFIGURATION_NUMBER 1 38 39 #define DRIVER_VERSION "usb_dnl 2.0" 40 41 static const char shortname[] = "usb_dnl_"; 42 static const char product[] = "USB download gadget"; 43 static const char manufacturer[] = CONFIG_G_DNL_MANUFACTURER; 44 45 static struct usb_device_descriptor device_desc = { 46 .bLength = sizeof device_desc, 47 .bDescriptorType = USB_DT_DEVICE, 48 49 .bcdUSB = __constant_cpu_to_le16(0x0200), 50 .bDeviceClass = USB_CLASS_COMM, 51 .bDeviceSubClass = 0x02, /*0x02:CDC-modem , 0x00:CDC-serial*/ 52 53 .idVendor = __constant_cpu_to_le16(CONFIG_G_DNL_VENDOR_NUM), 54 .idProduct = __constant_cpu_to_le16(CONFIG_G_DNL_PRODUCT_NUM), 55 .iProduct = STRING_PRODUCT, 56 .bNumConfigurations = 1, 57 }; 58 59 /* static strings, in UTF-8 */ 60 static struct usb_string g_dnl_string_defs[] = { 61 { 0, manufacturer, }, 62 { 1, product, }, 63 { } /* end of list */ 64 }; 65 66 static struct usb_gadget_strings g_dnl_string_tab = { 67 .language = 0x0409, /* en-us */ 68 .strings = g_dnl_string_defs, 69 }; 70 71 static struct usb_gadget_strings *g_dnl_composite_strings[] = { 72 &g_dnl_string_tab, 73 NULL, 74 }; 75 76 static int g_dnl_unbind(struct usb_composite_dev *cdev) 77 { 78 struct usb_gadget *gadget = cdev->gadget; 79 80 debug("%s: calling usb_gadget_disconnect for " 81 "controller '%s'\n", shortname, gadget->name); 82 usb_gadget_disconnect(gadget); 83 84 return 0; 85 } 86 87 static int g_dnl_do_config(struct usb_configuration *c) 88 { 89 const char *s = c->cdev->driver->name; 90 int ret = -1; 91 92 debug("%s: configuration: 0x%p composite dev: 0x%p\n", 93 __func__, c, c->cdev); 94 95 printf("GADGET DRIVER: %s\n", s); 96 if (!strcmp(s, "usb_dnl_dfu")) 97 ret = dfu_add(c); 98 else if (!strcmp(s, "usb_dnl_ums")) 99 ret = fsg_add(c); 100 101 return ret; 102 } 103 104 static int g_dnl_config_register(struct usb_composite_dev *cdev) 105 { 106 static struct usb_configuration config = { 107 .label = "usb_dnload", 108 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, 109 .bConfigurationValue = CONFIGURATION_NUMBER, 110 .iConfiguration = STRING_USBDOWN, 111 112 .bind = g_dnl_do_config, 113 }; 114 115 return usb_add_config(cdev, &config); 116 } 117 118 __weak 119 int g_dnl_bind_fixup(struct usb_device_descriptor *dev) 120 { 121 return 0; 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 g_dnl_bind_fixup(&device_desc); 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 if (!strcmp(type, "ums")) { 192 strcpy(name, shortname); 193 strcat(name, type); 194 } else { 195 printf("%s: unknown command: %s\n", __func__, type); 196 return -EINVAL; 197 } 198 199 g_dnl_driver.name = name; 200 201 debug("%s: g_dnl_driver.name: %s\n", __func__, g_dnl_driver.name); 202 ret = usb_composite_register(&g_dnl_driver); 203 204 if (ret) { 205 printf("%s: failed!, error: %d\n", __func__, ret); 206 return ret; 207 } 208 209 return 0; 210 } 211 212 void g_dnl_unregister(void) 213 { 214 usb_composite_unregister(&g_dnl_driver); 215 } 216