git.sur5r.net Git - u-boot/blob - drivers/usb/emul/sandbox_hub.c

   1 /*
   2  * (C) Copyright 2015 Google, Inc
   3  * Written by Simon Glass <sjg@chromium.org>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <dm.h>
  10 #include <usb.h>
  11 #include <dm/device-internal.h>
  12
  13 DECLARE_GLOBAL_DATA_PTR;
  14
  15 /* We only support up to 8 */
  16 #define SANDBOX_NUM_PORTS       4
  17
  18 struct sandbox_hub_platdata {
  19         struct usb_dev_platdata plat;
  20         int port;       /* Port number (numbered from 0) */
  21 };
  22
  23 enum {
  24         STRING_MANUFACTURER = 1,
  25         STRING_PRODUCT,
  26         STRING_SERIAL,
  27
  28         STRING_count,
  29 };
  30
  31 static struct usb_string hub_strings[] = {
  32         {STRING_MANUFACTURER,   "sandbox"},
  33         {STRING_PRODUCT,        "hub"},
  34         {STRING_SERIAL,         "2345"},
  35         {},
  36 };
  37
  38 static struct usb_device_descriptor hub_device_desc = {
  39         .bLength =              sizeof(hub_device_desc),
  40         .bDescriptorType =      USB_DT_DEVICE,
  41
  42         .bcdUSB =               __constant_cpu_to_le16(0x0200),
  43
  44         .bDeviceClass =         USB_CLASS_HUB,
  45         .bDeviceSubClass =      0,
  46         .bDeviceProtocol =      0,
  47
  48         .idVendor =             __constant_cpu_to_le16(0x1234),
  49         .idProduct =            __constant_cpu_to_le16(0x5678),
  50         .iManufacturer =        STRING_MANUFACTURER,
  51         .iProduct =             STRING_PRODUCT,
  52         .iSerialNumber =        STRING_SERIAL,
  53         .bNumConfigurations =   1,
  54 };
  55
  56 static struct usb_config_descriptor hub_config1 = {
  57         .bLength                = sizeof(hub_config1),
  58         .bDescriptorType        = USB_DT_CONFIG,
  59
  60         /* wTotalLength is set up by usb-emul-uclass */
  61         .bNumInterfaces         = 1,
  62         .bConfigurationValue    = 0,
  63         .iConfiguration         = 0,
  64         .bmAttributes           = 1 << 7,
  65         .bMaxPower              = 50,
  66 };
  67
  68 static struct usb_interface_descriptor hub_interface0 = {
  69         .bLength                = sizeof(hub_interface0),
  70         .bDescriptorType        = USB_DT_INTERFACE,
  71
  72         .bInterfaceNumber       = 0,
  73         .bAlternateSetting      = 0,
  74         .bNumEndpoints          = 1,
  75         .bInterfaceClass        = USB_CLASS_HUB,
  76         .bInterfaceSubClass     = 0,
  77         .bInterfaceProtocol     = US_PR_CB,
  78         .iInterface             = 0,
  79 };
  80
  81 static struct usb_endpoint_descriptor hub_endpoint0_in = {
  82         .bLength                = USB_DT_ENDPOINT_SIZE,
  83         .bDescriptorType        = USB_DT_ENDPOINT,
  84
  85         .bEndpointAddress       = 1 | USB_DIR_IN,
  86         .bmAttributes           = USB_ENDPOINT_XFER_INT,
  87         .wMaxPacketSize         = __constant_cpu_to_le16(1024),
  88         .bInterval              = 0,
  89 };
  90
  91 static struct usb_hub_descriptor hub_desc = {
  92         .bLength                = sizeof(hub_desc),
  93         .bDescriptorType        = USB_DT_HUB,
  94         .bNbrPorts              = SANDBOX_NUM_PORTS,
  95         .wHubCharacteristics    = __constant_cpu_to_le16(1 << 0 | 1 << 3 |
  96                                                                 1 << 7),
  97         .bPwrOn2PwrGood         = 2,
  98         .bHubContrCurrent       = 5,
  99         {
 100                 {
 101                         /* all ports removeable */
 102                         .DeviceRemovable        = {0, 0xff}
 103                 }
 104         }
 105 #if SANDBOX_NUM_PORTS > 8
 106 #error "This code sets up an incorrect mask"
 107 #endif
 108 };
 109
 110 static void *hub_desc_list[] = {
 111         &hub_device_desc,
 112         &hub_config1,
 113         &hub_interface0,
 114         &hub_endpoint0_in,
 115         &hub_desc,
 116         NULL,
 117 };
 118
 119 struct sandbox_hub_priv {
 120         int status[SANDBOX_NUM_PORTS];
 121         int change[SANDBOX_NUM_PORTS];
 122 };
 123
 124 static struct udevice *hub_find_device(struct udevice *hub, int port)
 125 {
 126         struct udevice *dev;
 127
 128         for (device_find_first_child(hub, &dev);
 129              dev;
 130              device_find_next_child(&dev)) {
 131                 struct sandbox_hub_platdata *plat;
 132
 133                 plat = dev_get_parent_platdata(dev);
 134                 if (plat->port == port)
 135                         return dev;
 136         }
 137
 138         return NULL;
 139 }
 140
 141 static int clrset_post_state(struct udevice *hub, int port, int clear, int set)
 142 {
 143         struct sandbox_hub_priv *priv = dev_get_priv(hub);
 144         int *status = &priv->status[port];
 145         int *change = &priv->change[port];
 146         int ret = 0;
 147
 148         if ((clear | set) & USB_PORT_STAT_POWER) {
 149                 struct udevice *dev = hub_find_device(hub, port);
 150
 151                 if (dev) {
 152                         if (set & USB_PORT_STAT_POWER) {
 153                                 ret = device_probe(dev);
 154                                 debug("%s: %s: power on, probed, ret=%d\n",
 155                                       __func__, dev->name, ret);
 156                                 if (!ret) {
 157                                         set |= USB_PORT_STAT_CONNECTION |
 158                                                 USB_PORT_STAT_ENABLE;
 159                                 }
 160
 161                         } else if (clear & USB_PORT_STAT_POWER) {
 162                                 debug("%s: %s: power off, removed, ret=%d\n",
 163                                       __func__, dev->name, ret);
 164                                 ret = device_remove(dev, DM_REMOVE_NORMAL);
 165                                 clear |= USB_PORT_STAT_CONNECTION;
 166                         }
 167                 }
 168         }
 169         *change |= *status & clear;
 170         *change |= ~*status & set;
 171         *change &= 0x1f;
 172         *status = (*status & ~clear) | set;
 173
 174         return ret;
 175 }
 176
 177 static int sandbox_hub_submit_control_msg(struct udevice *bus,
 178                                           struct usb_device *udev,
 179                                           unsigned long pipe,
 180                                           void *buffer, int length,
 181                                           struct devrequest *setup)
 182 {
 183         struct sandbox_hub_priv *priv = dev_get_priv(bus);
 184         int ret = 0;
 185
 186         if (pipe == usb_rcvctrlpipe(udev, 0)) {
 187                 switch (setup->requesttype) {
 188                 case USB_RT_HUB | USB_DIR_IN:
 189                         switch (setup->request) {
 190                         case USB_REQ_GET_STATUS: {
 191                                 struct usb_hub_status *hubsts = buffer;
 192
 193                                 hubsts->wHubStatus = 0;
 194                                 hubsts->wHubChange = 0;
 195                                 udev->status = 0;
 196                                 udev->act_len = sizeof(*hubsts);
 197                                 return 0;
 198                         }
 199                         default:
 200                                 debug("%s: rx ctl requesttype=%x, request=%x\n",
 201                                       __func__, setup->requesttype,
 202                                       setup->request);
 203                                 break;
 204                         }
 205                 case USB_RT_PORT | USB_DIR_IN:
 206                         switch (setup->request) {
 207                         case USB_REQ_GET_STATUS: {
 208                                 struct usb_port_status *portsts = buffer;
 209                                 int port;
 210
 211                                 port = (setup->index & USB_HUB_PORT_MASK) - 1;
 212                                 portsts->wPortStatus = priv->status[port];
 213                                 portsts->wPortChange = priv->change[port];
 214                                 udev->status = 0;
 215                                 udev->act_len = sizeof(*portsts);
 216                                 return 0;
 217                         }
 218                         }
 219                 default:
 220                         debug("%s: rx ctl requesttype=%x, request=%x\n",
 221                               __func__, setup->requesttype, setup->request);
 222                         break;
 223                 }
 224         } else if (pipe == usb_sndctrlpipe(udev, 0)) {
 225                 switch (setup->requesttype) {
 226                 case USB_RT_PORT:
 227                         switch (setup->request) {
 228                         case USB_REQ_SET_FEATURE: {
 229                                 int port;
 230
 231                                 port = (setup->index & USB_HUB_PORT_MASK) - 1;
 232                                 debug("set feature port=%x, feature=%x\n",
 233                                       port, setup->value);
 234                                 if (setup->value < USB_PORT_FEAT_C_CONNECTION) {
 235                                         ret = clrset_post_state(bus, port, 0,
 236                                                         1 << setup->value);
 237                                 } else {
 238                                         debug("  ** Invalid feature\n");
 239                                 }
 240                                 return ret;
 241                         }
 242                         case USB_REQ_CLEAR_FEATURE: {
 243                                 int port;
 244
 245                                 port = (setup->index & USB_HUB_PORT_MASK) - 1;
 246                                 debug("clear feature port=%x, feature=%x\n",
 247                                       port, setup->value);
 248                                 if (setup->value < USB_PORT_FEAT_C_CONNECTION) {
 249                                         ret = clrset_post_state(bus, port,
 250                                                         1 << setup->value, 0);
 251                                 } else {
 252                                         priv->change[port] &= 1 <<
 253                                                 (setup->value - 16);
 254                                 }
 255                                 udev->status = 0;
 256                                 return 0;
 257                         }
 258                         default:
 259                                 debug("%s: tx ctl requesttype=%x, request=%x\n",
 260                                       __func__, setup->requesttype,
 261                                       setup->request);
 262                                 break;
 263                         }
 264                 default:
 265                         debug("%s: tx ctl requesttype=%x, request=%x\n",
 266                               __func__, setup->requesttype, setup->request);
 267                         break;
 268                 }
 269         }
 270         debug("pipe=%lx\n", pipe);
 271
 272         return -EIO;
 273 }
 274
 275 static int sandbox_hub_bind(struct udevice *dev)
 276 {
 277         return usb_emul_setup_device(dev, PACKET_SIZE_64, hub_strings,
 278                                      hub_desc_list);
 279 }
 280
 281 static int sandbox_child_post_bind(struct udevice *dev)
 282 {
 283         struct sandbox_hub_platdata *plat = dev_get_parent_platdata(dev);
 284
 285         plat->port = dev_read_u32_default(dev, "reg", -1);
 286
 287         return 0;
 288 }
 289
 290 static const struct dm_usb_ops sandbox_usb_hub_ops = {
 291         .control        = sandbox_hub_submit_control_msg,
 292 };
 293
 294 static const struct udevice_id sandbox_usb_hub_ids[] = {
 295         { .compatible = "sandbox,usb-hub" },
 296         { }
 297 };
 298
 299 U_BOOT_DRIVER(usb_sandbox_hub) = {
 300         .name   = "usb_sandbox_hub",
 301         .id     = UCLASS_USB_EMUL,
 302         .of_match = sandbox_usb_hub_ids,
 303         .bind   = sandbox_hub_bind,
 304         .ops    = &sandbox_usb_hub_ops,
 305         .priv_auto_alloc_size = sizeof(struct sandbox_hub_priv),
 306         .per_child_platdata_auto_alloc_size =
 307                         sizeof(struct sandbox_hub_platdata),
 308         .child_post_bind = sandbox_child_post_bind,
 309 };