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 /* 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 /*
  60  * static strings, in UTF-8
  61  * IDs for those strings are assigned dynamically at g_dnl_bind()
  62  */
  63 static struct usb_string g_dnl_string_defs[] = {
  64         {.s = manufacturer},
  65         {.s = product},
  66         { }             /* end of list */
  67 };
  68
  69 static struct usb_gadget_strings g_dnl_string_tab = {
  70         .language = 0x0409, /* en-us */
  71         .strings = g_dnl_string_defs,
  72 };
  73
  74 static struct usb_gadget_strings *g_dnl_composite_strings[] = {
  75         &g_dnl_string_tab,
  76         NULL,
  77 };
  78
  79 static int g_dnl_unbind(struct usb_composite_dev *cdev)
  80 {
  81         struct usb_gadget *gadget = cdev->gadget;
  82
  83         free(cdev->config);
  84         cdev->config = NULL;
  85         debug("%s: calling usb_gadget_disconnect for "
  86                         "controller '%s'\n", shortname, gadget->name);
  87         usb_gadget_disconnect(gadget);
  88
  89         return 0;
  90 }
  91
  92 static int g_dnl_do_config(struct usb_configuration *c)
  93 {
  94         const char *s = c->cdev->driver->name;
  95         int ret = -1;
  96
  97         debug("%s: configuration: 0x%p composite dev: 0x%p\n",
  98               __func__, c, c->cdev);
  99
 100         printf("GADGET DRIVER: %s\n", s);
 101         if (!strcmp(s, "usb_dnl_dfu"))
 102                 ret = dfu_add(c);
 103         else if (!strcmp(s, "usb_dnl_ums"))
 104                 ret = fsg_add(c);
 105         else if (!strcmp(s, "usb_dnl_thor"))
 106                 ret = thor_add(c);
 107
 108         return ret;
 109 }
 110
 111 static int g_dnl_config_register(struct usb_composite_dev *cdev)
 112 {
 113         struct usb_configuration *config;
 114         const char *name = "usb_dnload";
 115
 116         config = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*config));
 117         if (!config)
 118                 return -ENOMEM;
 119
 120         memset(config, 0, sizeof(*config));
 121
 122         config->label = name;
 123         config->bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER;
 124         config->bConfigurationValue = CONFIGURATION_NUMBER;
 125         config->iConfiguration = STRING_USBDOWN;
 126         config->bind = g_dnl_do_config;
 127
 128         return usb_add_config(cdev, config);
 129 }
 130
 131 __weak
 132 int g_dnl_bind_fixup(struct usb_device_descriptor *dev, const char *name)
 133 {
 134         return 0;
 135 }
 136
 137 static int g_dnl_bind(struct usb_composite_dev *cdev)
 138 {
 139         struct usb_gadget *gadget = cdev->gadget;
 140         int id, ret;
 141         int gcnum;
 142
 143         debug("%s: gadget: 0x%p cdev: 0x%p\n", __func__, gadget, cdev);
 144
 145         id = usb_string_id(cdev);
 146
 147         if (id < 0)
 148                 return id;
 149         g_dnl_string_defs[0].id = id;
 150         device_desc.iManufacturer = id;
 151
 152         id = usb_string_id(cdev);
 153         if (id < 0)
 154                 return id;
 155
 156         g_dnl_string_defs[1].id = id;
 157         device_desc.iProduct = id;
 158
 159         g_dnl_bind_fixup(&device_desc, cdev->driver->name);
 160         ret = g_dnl_config_register(cdev);
 161         if (ret)
 162                 goto error;
 163
 164         gcnum = usb_gadget_controller_number(gadget);
 165
 166         debug("gcnum: %d\n", gcnum);
 167         if (gcnum >= 0)
 168                 device_desc.bcdDevice = cpu_to_le16(0x0200 + gcnum);
 169         else {
 170                 debug("%s: controller '%s' not recognized\n",
 171                         shortname, gadget->name);
 172                 device_desc.bcdDevice = __constant_cpu_to_le16(0x9999);
 173         }
 174
 175         debug("%s: calling usb_gadget_connect for "
 176                         "controller '%s'\n", shortname, gadget->name);
 177         usb_gadget_connect(gadget);
 178
 179         return 0;
 180
 181  error:
 182         g_dnl_unbind(cdev);
 183         return -ENOMEM;
 184 }
 185
 186 static struct usb_composite_driver g_dnl_driver = {
 187         .name = NULL,
 188         .dev = &device_desc,
 189         .strings = g_dnl_composite_strings,
 190
 191         .bind = g_dnl_bind,
 192         .unbind = g_dnl_unbind,
 193 };
 194
 195 int g_dnl_register(const char *type)
 196 {
 197         /* The largest function name is 4 */
 198         static char name[sizeof(shortname) + 4];
 199         int ret;
 200
 201         if (!strcmp(type, "dfu")) {
 202                 strcpy(name, shortname);
 203                 strcat(name, type);
 204         } else if (!strcmp(type, "ums")) {
 205                 strcpy(name, shortname);
 206                 strcat(name, type);
 207         } else if (!strcmp(type, "thor")) {
 208                 strcpy(name, shortname);
 209                 strcat(name, type);
 210         } else {
 211                 printf("%s: unknown command: %s\n", __func__, type);
 212                 return -EINVAL;
 213         }
 214
 215         g_dnl_driver.name = name;
 216
 217         debug("%s: g_dnl_driver.name: %s\n", __func__, g_dnl_driver.name);
 218         ret = usb_composite_register(&g_dnl_driver);
 219
 220         if (ret) {
 221                 printf("%s: failed!, error: %d\n", __func__, ret);
 222                 return ret;
 223         }
 224
 225         return 0;
 226 }
 227
 228 void g_dnl_unregister(void)
 229 {
 230         usb_composite_unregister(&g_dnl_driver);
 231 }