drivers/usb/gadget/g_dnl.c

   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 #include <thor.h>
  20
  21 #include "gadget_chips.h"
  22 #include "composite.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 /* Index of String serial */
  37 #define STRING_SERIAL  3
  38 #define MAX_STRING_SERIAL       32
  39 /* Number of supported configurations */
  40 #define CONFIGURATION_NUMBER 1
  41
  42 #define DRIVER_VERSION          "usb_dnl 2.0"
  43
  44 static const char shortname[] = "usb_dnl_";
  45 static const char product[] = "USB download gadget";
  46 static char g_dnl_serial[MAX_STRING_SERIAL];
  47 static const char manufacturer[] = CONFIG_G_DNL_MANUFACTURER;
  48
  49 void g_dnl_set_serialnumber(char *s)
  50 {
  51         memset(g_dnl_serial, 0, MAX_STRING_SERIAL);
  52         if (strlen(s) < MAX_STRING_SERIAL)
  53                 strncpy(g_dnl_serial, s, strlen(s));
  54 }
  55
  56 static struct usb_device_descriptor device_desc = {
  57         .bLength = sizeof device_desc,
  58         .bDescriptorType = USB_DT_DEVICE,
  59
  60         .bcdUSB = __constant_cpu_to_le16(0x0200),
  61         .bDeviceClass = USB_CLASS_COMM,
  62         .bDeviceSubClass = 0x02, /*0x02:CDC-modem , 0x00:CDC-serial*/
  63
  64         .idVendor = __constant_cpu_to_le16(CONFIG_G_DNL_VENDOR_NUM),
  65         .idProduct = __constant_cpu_to_le16(CONFIG_G_DNL_PRODUCT_NUM),
  66         .iProduct = STRING_PRODUCT,
  67         .iSerialNumber = STRING_SERIAL,
  68         .bNumConfigurations = 1,
  69 };
  70
  71 /*
  72  * static strings, in UTF-8
  73  * IDs for those strings are assigned dynamically at g_dnl_bind()
  74  */
  75 static struct usb_string g_dnl_string_defs[] = {
  76         {.s = manufacturer},
  77         {.s = product},
  78         {.s = g_dnl_serial},
  79         { }             /* end of list */
  80 };
  81
  82 static struct usb_gadget_strings g_dnl_string_tab = {
  83         .language = 0x0409, /* en-us */
  84         .strings = g_dnl_string_defs,
  85 };
  86
  87 static struct usb_gadget_strings *g_dnl_composite_strings[] = {
  88         &g_dnl_string_tab,
  89         NULL,
  90 };
  91
  92 static int g_dnl_unbind(struct usb_composite_dev *cdev)
  93 {
  94         struct usb_gadget *gadget = cdev->gadget;
  95
  96         free(cdev->config);
  97         cdev->config = NULL;
  98         debug("%s: calling usb_gadget_disconnect for "
  99                         "controller '%s'\n", shortname, gadget->name);
 100         usb_gadget_disconnect(gadget);
 101
 102         return 0;
 103 }
 104
 105 static int g_dnl_do_config(struct usb_configuration *c)
 106 {
 107         const char *s = c->cdev->driver->name;
 108         int ret = -1;
 109
 110         debug("%s: configuration: 0x%p composite dev: 0x%p\n",
 111               __func__, c, c->cdev);
 112
 113         printf("GADGET DRIVER: %s\n", s);
 114         if (!strcmp(s, "usb_dnl_dfu"))
 115                 ret = dfu_add(c);
 116         else if (!strcmp(s, "usb_dnl_ums"))
 117                 ret = fsg_add(c);
 118         else if (!strcmp(s, "usb_dnl_thor"))
 119                 ret = thor_add(c);
 120
 121         return ret;
 122 }
 123
 124 static int g_dnl_config_register(struct usb_composite_dev *cdev)
 125 {
 126         struct usb_configuration *config;
 127         const char *name = "usb_dnload";
 128
 129         config = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*config));
 130         if (!config)
 131                 return -ENOMEM;
 132
 133         memset(config, 0, sizeof(*config));
 134
 135         config->label = name;
 136         config->bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER;
 137         config->bConfigurationValue = CONFIGURATION_NUMBER;
 138         config->iConfiguration = STRING_USBDOWN;
 139         config->bind = g_dnl_do_config;
 140
 141         return usb_add_config(cdev, config);
 142 }
 143
 144 __weak
 145 int g_dnl_bind_fixup(struct usb_device_descriptor *dev, const char *name)
 146 {
 147         return 0;
 148 }
 149
 150 __weak int g_dnl_get_board_bcd_device_number(int gcnum)
 151 {
 152         return gcnum;
 153 }
 154
 155 static int g_dnl_get_bcd_device_number(struct usb_composite_dev *cdev)
 156 {
 157         struct usb_gadget *gadget = cdev->gadget;
 158         int gcnum;
 159
 160         gcnum = usb_gadget_controller_number(gadget);
 161         if (gcnum > 0)
 162                 gcnum += 0x200;
 163
 164         return g_dnl_get_board_bcd_device_number(gcnum);
 165 }
 166
 167 static int g_dnl_bind(struct usb_composite_dev *cdev)
 168 {
 169         struct usb_gadget *gadget = cdev->gadget;
 170         int id, ret;
 171         int gcnum;
 172
 173         debug("%s: gadget: 0x%p cdev: 0x%p\n", __func__, gadget, cdev);
 174
 175         id = usb_string_id(cdev);
 176
 177         if (id < 0)
 178                 return id;
 179         g_dnl_string_defs[0].id = id;
 180         device_desc.iManufacturer = id;
 181
 182         id = usb_string_id(cdev);
 183         if (id < 0)
 184                 return id;
 185
 186         g_dnl_string_defs[1].id = id;
 187         device_desc.iProduct = id;
 188
 189         id = usb_string_id(cdev);
 190         if (id < 0)
 191                 return id;
 192
 193         g_dnl_string_defs[2].id = id;
 194         device_desc.iSerialNumber = id;
 195
 196         g_dnl_bind_fixup(&device_desc, cdev->driver->name);
 197         ret = g_dnl_config_register(cdev);
 198         if (ret)
 199                 goto error;
 200
 201         gcnum = g_dnl_get_bcd_device_number(cdev);
 202         if (gcnum >= 0)
 203                 device_desc.bcdDevice = cpu_to_le16(gcnum);
 204         else {
 205                 debug("%s: controller '%s' not recognized\n",
 206                         shortname, gadget->name);
 207                 device_desc.bcdDevice = __constant_cpu_to_le16(0x9999);
 208         }
 209
 210         debug("%s: calling usb_gadget_connect for "
 211                         "controller '%s'\n", shortname, gadget->name);
 212         usb_gadget_connect(gadget);
 213
 214         return 0;
 215
 216  error:
 217         g_dnl_unbind(cdev);
 218         return -ENOMEM;
 219 }
 220
 221 static struct usb_composite_driver g_dnl_driver = {
 222         .name = NULL,
 223         .dev = &device_desc,
 224         .strings = g_dnl_composite_strings,
 225
 226         .bind = g_dnl_bind,
 227         .unbind = g_dnl_unbind,
 228 };
 229
 230 int g_dnl_register(const char *type)
 231 {
 232         /* The largest function name is 4 */
 233         static char name[sizeof(shortname) + 4];
 234         int ret;
 235
 236         if (!strcmp(type, "dfu")) {
 237                 strcpy(name, shortname);
 238                 strcat(name, type);
 239         } else if (!strcmp(type, "ums")) {
 240                 strcpy(name, shortname);
 241                 strcat(name, type);
 242         } else if (!strcmp(type, "thor")) {
 243                 strcpy(name, shortname);
 244                 strcat(name, type);
 245         } else {
 246                 printf("%s: unknown command: %s\n", __func__, type);
 247                 return -EINVAL;
 248         }
 249
 250         g_dnl_driver.name = name;
 251
 252         debug("%s: g_dnl_driver.name: %s\n", __func__, g_dnl_driver.name);
 253         ret = usb_composite_register(&g_dnl_driver);
 254
 255         if (ret) {
 256                 printf("%s: failed!, error: %d\n", __func__, ret);
 257                 return ret;
 258         }
 259
 260         return 0;
 261 }
 262
 263 void g_dnl_unregister(void)
 264 {
 265         usb_composite_unregister(&g_dnl_driver);
 266 }