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