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 <common.h> 11 #include <malloc.h> 12 13 #include <mmc.h> 14 #include <part.h> 15 16 #include <g_dnl.h> 17 #include <usb_mass_storage.h> 18 #include <dfu.h> 19 20 #include "gadget_chips.h" 21 #include "composite.c" 22 23 /* 24 * One needs to define the following: 25 * CONFIG_G_DNL_VENDOR_NUM 26 * CONFIG_G_DNL_PRODUCT_NUM 27 * CONFIG_G_DNL_MANUFACTURER 28 * at e.g. ./include/configs/<board>.h 29 */ 30 31 #define STRING_MANUFACTURER 25 32 #define STRING_PRODUCT 2 33 /* Index of String Descriptor describing this configuration */ 34 #define STRING_USBDOWN 2 35 /* Number of supported configurations */ 36 #define CONFIGURATION_NUMBER 1 37 38 #define DRIVER_VERSION "usb_dnl 2.0" 39 40 static const char shortname[] = "usb_dnl_"; 41 static const char product[] = "USB download gadget"; 42 static const char manufacturer[] = CONFIG_G_DNL_MANUFACTURER; 43 44 static struct usb_device_descriptor device_desc = { 45 .bLength = sizeof device_desc, 46 .bDescriptorType = USB_DT_DEVICE, 47 48 .bcdUSB = __constant_cpu_to_le16(0x0200), 49 .bDeviceClass = USB_CLASS_COMM, 50 .bDeviceSubClass = 0x02, /*0x02:CDC-modem , 0x00:CDC-serial*/ 51 52 .idVendor = __constant_cpu_to_le16(CONFIG_G_DNL_VENDOR_NUM), 53 .idProduct = __constant_cpu_to_le16(CONFIG_G_DNL_PRODUCT_NUM), 54 .iProduct = STRING_PRODUCT, 55 .bNumConfigurations = 1, 56 }; 57 58 /* 59 * static strings, in UTF-8 60 * IDs for those strings are assigned dynamically at g_dnl_bind() 61 */ 62 static struct usb_string g_dnl_string_defs[] = { 63 {.s = manufacturer}, 64 {.s = product}, 65 { } /* end of list */ 66 }; 67 68 static struct usb_gadget_strings g_dnl_string_tab = { 69 .language = 0x0409, /* en-us */ 70 .strings = g_dnl_string_defs, 71 }; 72 73 static struct usb_gadget_strings *g_dnl_composite_strings[] = { 74 &g_dnl_string_tab, 75 NULL, 76 }; 77 78 static int g_dnl_unbind(struct usb_composite_dev *cdev) 79 { 80 struct usb_gadget *gadget = cdev->gadget; 81 82 free(cdev->config); 83 cdev->config = NULL; 84 debug("%s: calling usb_gadget_disconnect for " 85 "controller '%s'\n", shortname, gadget->name); 86 usb_gadget_disconnect(gadget); 87 88 return 0; 89 } 90 91 static int g_dnl_do_config(struct usb_configuration *c) 92 { 93 const char *s = c->cdev->driver->name; 94 int ret = -1; 95 96 debug("%s: configuration: 0x%p composite dev: 0x%p\n", 97 __func__, c, c->cdev); 98 99 printf("GADGET DRIVER: %s\n", s); 100 if (!strcmp(s, "usb_dnl_dfu")) 101 ret = dfu_add(c); 102 else if (!strcmp(s, "usb_dnl_ums")) 103 ret = fsg_add(c); 104 105 return ret; 106 } 107 108 static int g_dnl_config_register(struct usb_composite_dev *cdev) 109 { 110 struct usb_configuration *config; 111 const char *name = "usb_dnload"; 112 113 config = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*config)); 114 if (!config) 115 return -ENOMEM; 116 117 memset(config, 0, sizeof(*config)); 118 119 config->label = name; 120 config->bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER; 121 config->bConfigurationValue = CONFIGURATION_NUMBER; 122 config->iConfiguration = STRING_USBDOWN; 123 config->bind = g_dnl_do_config; 124 125 return usb_add_config(cdev, config); 126 } 127 128 __weak 129 int g_dnl_bind_fixup(struct usb_device_descriptor *dev, const char *name) 130 { 131 return 0; 132 } 133 134 static int g_dnl_bind(struct usb_composite_dev *cdev) 135 { 136 struct usb_gadget *gadget = cdev->gadget; 137 int id, ret; 138 int gcnum; 139 140 debug("%s: gadget: 0x%p cdev: 0x%p\n", __func__, gadget, cdev); 141 142 id = usb_string_id(cdev); 143 144 if (id < 0) 145 return id; 146 g_dnl_string_defs[0].id = id; 147 device_desc.iManufacturer = id; 148 149 id = usb_string_id(cdev); 150 if (id < 0) 151 return id; 152 153 g_dnl_string_defs[1].id = id; 154 device_desc.iProduct = id; 155 156 g_dnl_bind_fixup(&device_desc, cdev->driver->name); 157 ret = g_dnl_config_register(cdev); 158 if (ret) 159 goto error; 160 161 gcnum = usb_gadget_controller_number(gadget); 162 163 debug("gcnum: %d\n", gcnum); 164 if (gcnum >= 0) 165 device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum); 166 else { 167 debug("%s: controller '%s' not recognized\n", 168 shortname, gadget->name); 169 device_desc.bcdDevice = __constant_cpu_to_le16(0x9999); 170 } 171 172 debug("%s: calling usb_gadget_connect for " 173 "controller '%s'\n", shortname, gadget->name); 174 usb_gadget_connect(gadget); 175 176 return 0; 177 178 error: 179 g_dnl_unbind(cdev); 180 return -ENOMEM; 181 } 182 183 static struct usb_composite_driver g_dnl_driver = { 184 .name = NULL, 185 .dev = &device_desc, 186 .strings = g_dnl_composite_strings, 187 188 .bind = g_dnl_bind, 189 .unbind = g_dnl_unbind, 190 }; 191 192 int g_dnl_register(const char *type) 193 { 194 /* We only allow "dfu" atm, so 3 should be enough */ 195 static char name[sizeof(shortname) + 3]; 196 int ret; 197 198 if (!strcmp(type, "dfu")) { 199 strcpy(name, shortname); 200 strcat(name, type); 201 } else if (!strcmp(type, "ums")) { 202 strcpy(name, shortname); 203 strcat(name, type); 204 } else { 205 printf("%s: unknown command: %s\n", __func__, type); 206 return -EINVAL; 207 } 208 209 g_dnl_driver.name = name; 210 211 debug("%s: g_dnl_driver.name: %s\n", __func__, g_dnl_driver.name); 212 ret = usb_composite_register(&g_dnl_driver); 213 214 if (ret) { 215 printf("%s: failed!, error: %d\n", __func__, ret); 216 return ret; 217 } 218 219 return 0; 220 } 221 222 void g_dnl_unregister(void) 223 { 224 usb_composite_unregister(&g_dnl_driver); 225 } 226