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 .DeviceRemovable = {0, 0xff}, /* all ports removeable */ 100 #if SANDBOX_NUM_PORTS > 8 101 #error "This code sets up an incorrect mask" 102 #endif 103 }; 104 105 static void *hub_desc_list[] = { 106 &hub_device_desc, 107 &hub_config1, 108 &hub_interface0, 109 &hub_endpoint0_in, 110 &hub_desc, 111 NULL, 112 }; 113 114 struct sandbox_hub_priv { 115 int status[SANDBOX_NUM_PORTS]; 116 int change[SANDBOX_NUM_PORTS]; 117 }; 118 119 static struct udevice *hub_find_device(struct udevice *hub, int port) 120 { 121 struct udevice *dev; 122 123 for (device_find_first_child(hub, &dev); 124 dev; 125 device_find_next_child(&dev)) { 126 struct sandbox_hub_platdata *plat; 127 128 plat = dev_get_parent_platdata(dev); 129 if (plat->port == port) 130 return dev; 131 } 132 133 return NULL; 134 } 135 136 static int clrset_post_state(struct udevice *hub, int port, int clear, int set) 137 { 138 struct sandbox_hub_priv *priv = dev_get_priv(hub); 139 int *status = &priv->status[port]; 140 int *change = &priv->change[port]; 141 int ret = 0; 142 143 if ((clear | set) & USB_PORT_STAT_POWER) { 144 struct udevice *dev = hub_find_device(hub, port); 145 146 if (dev) { 147 if (set & USB_PORT_STAT_POWER) { 148 ret = device_probe(dev); 149 debug("%s: %s: power on, probed, ret=%d\n", 150 __func__, dev->name, ret); 151 if (!ret) { 152 set |= USB_PORT_STAT_CONNECTION | 153 USB_PORT_STAT_ENABLE; 154 } 155 156 } else if (clear & USB_PORT_STAT_POWER) { 157 debug("%s: %s: power off, removed, ret=%d\n", 158 __func__, dev->name, ret); 159 ret = device_remove(dev, DM_REMOVE_NORMAL); 160 clear |= USB_PORT_STAT_CONNECTION; 161 } 162 } 163 } 164 *change |= *status & clear; 165 *change |= ~*status & set; 166 *change &= 0x1f; 167 *status = (*status & ~clear) | set; 168 169 return ret; 170 } 171 172 static int sandbox_hub_submit_control_msg(struct udevice *bus, 173 struct usb_device *udev, 174 unsigned long pipe, 175 void *buffer, int length, 176 struct devrequest *setup) 177 { 178 struct sandbox_hub_priv *priv = dev_get_priv(bus); 179 int ret = 0; 180 181 if (pipe == usb_rcvctrlpipe(udev, 0)) { 182 switch (setup->requesttype) { 183 case USB_RT_HUB | USB_DIR_IN: 184 switch (setup->request) { 185 case USB_REQ_GET_STATUS: { 186 struct usb_hub_status *hubsts = buffer; 187 188 hubsts->wHubStatus = 0; 189 hubsts->wHubChange = 0; 190 udev->status = 0; 191 udev->act_len = sizeof(*hubsts); 192 return 0; 193 } 194 default: 195 debug("%s: rx ctl requesttype=%x, request=%x\n", 196 __func__, setup->requesttype, 197 setup->request); 198 break; 199 } 200 case USB_RT_PORT | USB_DIR_IN: 201 switch (setup->request) { 202 case USB_REQ_GET_STATUS: { 203 struct usb_port_status *portsts = buffer; 204 int port; 205 206 port = (setup->index & USB_HUB_PORT_MASK) - 1; 207 portsts->wPortStatus = priv->status[port]; 208 portsts->wPortChange = priv->change[port]; 209 udev->status = 0; 210 udev->act_len = sizeof(*portsts); 211 return 0; 212 } 213 } 214 default: 215 debug("%s: rx ctl requesttype=%x, request=%x\n", 216 __func__, setup->requesttype, setup->request); 217 break; 218 } 219 } else if (pipe == usb_sndctrlpipe(udev, 0)) { 220 switch (setup->requesttype) { 221 case USB_RT_PORT: 222 switch (setup->request) { 223 case USB_REQ_SET_FEATURE: { 224 int port; 225 226 port = (setup->index & USB_HUB_PORT_MASK) - 1; 227 debug("set feature port=%x, feature=%x\n", 228 port, setup->value); 229 if (setup->value < USB_PORT_FEAT_C_CONNECTION) { 230 ret = clrset_post_state(bus, port, 0, 231 1 << setup->value); 232 } else { 233 debug(" ** Invalid feature\n"); 234 } 235 return ret; 236 } 237 case USB_REQ_CLEAR_FEATURE: { 238 int port; 239 240 port = (setup->index & USB_HUB_PORT_MASK) - 1; 241 debug("clear feature port=%x, feature=%x\n", 242 port, setup->value); 243 if (setup->value < USB_PORT_FEAT_C_CONNECTION) { 244 ret = clrset_post_state(bus, port, 245 1 << setup->value, 0); 246 } else { 247 priv->change[port] &= 1 << 248 (setup->value - 16); 249 } 250 udev->status = 0; 251 return 0; 252 } 253 default: 254 debug("%s: tx ctl requesttype=%x, request=%x\n", 255 __func__, setup->requesttype, 256 setup->request); 257 break; 258 } 259 default: 260 debug("%s: tx ctl requesttype=%x, request=%x\n", 261 __func__, setup->requesttype, setup->request); 262 break; 263 } 264 } 265 debug("pipe=%lx\n", pipe); 266 267 return -EIO; 268 } 269 270 static int sandbox_hub_bind(struct udevice *dev) 271 { 272 return usb_emul_setup_device(dev, PACKET_SIZE_64, hub_strings, 273 hub_desc_list); 274 } 275 276 static int sandbox_child_post_bind(struct udevice *dev) 277 { 278 struct sandbox_hub_platdata *plat = dev_get_parent_platdata(dev); 279 280 plat->port = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev), "reg", 281 -1); 282 283 return 0; 284 } 285 286 static const struct dm_usb_ops sandbox_usb_hub_ops = { 287 .control = sandbox_hub_submit_control_msg, 288 }; 289 290 static const struct udevice_id sandbox_usb_hub_ids[] = { 291 { .compatible = "sandbox,usb-hub" }, 292 { } 293 }; 294 295 U_BOOT_DRIVER(usb_sandbox_hub) = { 296 .name = "usb_sandbox_hub", 297 .id = UCLASS_USB_EMUL, 298 .of_match = sandbox_usb_hub_ids, 299 .bind = sandbox_hub_bind, 300 .ops = &sandbox_usb_hub_ops, 301 .priv_auto_alloc_size = sizeof(struct sandbox_hub_priv), 302 .per_child_platdata_auto_alloc_size = 303 sizeof(struct sandbox_hub_platdata), 304 .child_post_bind = sandbox_child_post_bind, 305 }; 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