git.sur5r.net Git - u-boot/blob - 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
  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         debug("%s: calling usb_gadget_disconnect for "
  83                         "controller '%s'\n", shortname, gadget->name);
  84         usb_gadget_disconnect(gadget);
  85
  86         return 0;
  87 }
  88
  89 static int g_dnl_do_config(struct usb_configuration *c)
  90 {
  91         const char *s = c->cdev->driver->name;
  92         int ret = -1;
  93
  94         debug("%s: configuration: 0x%p composite dev: 0x%p\n",
  95               __func__, c, c->cdev);
  96
  97         printf("GADGET DRIVER: %s\n", s);
  98         if (!strcmp(s, "usb_dnl_dfu"))
  99                 ret = dfu_add(c);
 100         else if (!strcmp(s, "usb_dnl_ums"))
 101                 ret = fsg_add(c);
 102
 103         return ret;
 104 }
 105
 106 static int g_dnl_config_register(struct usb_composite_dev *cdev)
 107 {
 108         static struct usb_configuration config = {
 109                 .label = "usb_dnload",
 110                 .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
 111                 .bConfigurationValue =  CONFIGURATION_NUMBER,
 112                 .iConfiguration =       STRING_USBDOWN,
 113
 114                 .bind = g_dnl_do_config,
 115         };
 116
 117         return usb_add_config(cdev, &config);
 118 }
 119
 120 __weak
 121 int g_dnl_bind_fixup(struct usb_device_descriptor *dev)
 122 {
 123         return 0;
 124 }
 125
 126 static int g_dnl_bind(struct usb_composite_dev *cdev)
 127 {
 128         struct usb_gadget *gadget = cdev->gadget;
 129         int id, ret;
 130         int gcnum;
 131
 132         debug("%s: gadget: 0x%p cdev: 0x%p\n", __func__, gadget, cdev);
 133
 134         id = usb_string_id(cdev);
 135
 136         if (id < 0)
 137                 return id;
 138         g_dnl_string_defs[0].id = id;
 139         device_desc.iManufacturer = id;
 140
 141         id = usb_string_id(cdev);
 142         if (id < 0)
 143                 return id;
 144
 145         g_dnl_string_defs[1].id = id;
 146         device_desc.iProduct = id;
 147
 148         g_dnl_bind_fixup(&device_desc);
 149         ret = g_dnl_config_register(cdev);
 150         if (ret)
 151                 goto error;
 152
 153         gcnum = usb_gadget_controller_number(gadget);
 154
 155         debug("gcnum: %d\n", gcnum);
 156         if (gcnum >= 0)
 157                 device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum);
 158         else {
 159                 debug("%s: controller '%s' not recognized\n",
 160                         shortname, gadget->name);
 161                 device_desc.bcdDevice = __constant_cpu_to_le16(0x9999);
 162         }
 163
 164         debug("%s: calling usb_gadget_connect for "
 165                         "controller '%s'\n", shortname, gadget->name);
 166         usb_gadget_connect(gadget);
 167
 168         return 0;
 169
 170  error:
 171         g_dnl_unbind(cdev);
 172         return -ENOMEM;
 173 }
 174
 175 static struct usb_composite_driver g_dnl_driver = {
 176         .name = NULL,
 177         .dev = &device_desc,
 178         .strings = g_dnl_composite_strings,
 179
 180         .bind = g_dnl_bind,
 181         .unbind = g_dnl_unbind,
 182 };
 183
 184 int g_dnl_register(const char *type)
 185 {
 186         /* We only allow "dfu" atm, so 3 should be enough */
 187         static char name[sizeof(shortname) + 3];
 188         int ret;
 189
 190         if (!strcmp(type, "dfu")) {
 191                 strcpy(name, shortname);
 192                 strcat(name, type);
 193         } else if (!strcmp(type, "ums")) {
 194                 strcpy(name, shortname);
 195                 strcat(name, type);
 196         } else {
 197                 printf("%s: unknown command: %s\n", __func__, type);
 198                 return -EINVAL;
 199         }
 200
 201         g_dnl_driver.name = name;
 202
 203         debug("%s: g_dnl_driver.name: %s\n", __func__, g_dnl_driver.name);
 204         ret = usb_composite_register(&g_dnl_driver);
 205
 206         if (ret) {
 207                 printf("%s: failed!, error: %d\n", __func__, ret);
 208                 return ret;
 209         }
 210
 211         return 0;
 212 }
 213
 214 void g_dnl_unregister(void)
 215 {
 216         usb_composite_unregister(&g_dnl_driver);
 217 }