return 0;
}
+/******************************************************************************
+ * Detect if a USB device has been plugged or unplugged.
+ */
+int usb_detect_change(void)
+{
+ int i, j;
+ int change = 0;
+
+ for (j = 0; j < USB_MAX_DEVICE; j++) {
+ for (i = 0; i < usb_dev[j].maxchild; i++) {
+ struct usb_port_status status;
+
+ if (usb_get_port_status(&usb_dev[j], i + 1,
+ &status) < 0)
+ /* USB request failed */
+ continue;
+
+ if (le16_to_cpu(status.wPortChange) &
+ USB_PORT_STAT_C_CONNECTION)
+ change++;
+ }
+ }
+
+ return change;
+}
+
/*
* disables the asynch behaviour of the control message. This is used for data
* transfers that uses the exclusiv access to the control and bulk messages.
void *data, unsigned short size, int timeout)
{
ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1);
+ int err;
if ((timeout == 0) && (!asynch_allowed)) {
/* request for a asynch control pipe is not allowed */
request, requesttype, value, index, size);
dev->status = USB_ST_NOT_PROC; /*not yet processed */
- if (submit_control_msg(dev, pipe, data, size, setup_packet) < 0)
- return -EIO;
+ err = submit_control_msg(dev, pipe, data, size, setup_packet);
+ if (err < 0)
+ return err;
if (timeout == 0)
return (int)size;
}
#endif /* !CONFIG_DM_USB */
-#ifndef CONFIG_DM_USB
-int usb_legacy_port_reset(struct usb_device *hub, int portnr)
+static int usb_hub_port_reset(struct usb_device *dev, struct usb_device *hub)
{
if (hub) {
unsigned short portstatus;
int err;
/* reset the port for the second time */
- err = legacy_hub_port_reset(hub, portnr - 1, &portstatus);
+ err = legacy_hub_port_reset(hub, dev->portnr - 1, &portstatus);
if (err < 0) {
- printf("\n Couldn't reset port %i\n", portnr);
+ printf("\n Couldn't reset port %i\n", dev->portnr);
return err;
}
} else {
- usb_reset_root_port();
+ usb_reset_root_port(dev);
}
return 0;
}
-#endif
static int get_descriptor_len(struct usb_device *dev, int len, int expect_len)
{
static int usb_setup_descriptor(struct usb_device *dev, bool do_read)
{
- __maybe_unused struct usb_device_descriptor *desc;
-
/*
* This is a Windows scheme of initialization sequence, with double
* reset of the device (Linux uses the same sequence)
* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
* only 18 bytes long, this will terminate with a short packet. But if
* the maxpacket size is 8 or 16 the device may be waiting to transmit
- * some more, or keeps on retransmitting the 8 byte header. */
+ * some more, or keeps on retransmitting the 8 byte header.
+ */
- dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
- /* Default to 64 byte max packet size */
- dev->maxpacketsize = PACKET_SIZE_64;
- dev->epmaxpacketin[0] = 64;
- dev->epmaxpacketout[0] = 64;
+ if (dev->speed == USB_SPEED_LOW) {
+ dev->descriptor.bMaxPacketSize0 = 8;
+ dev->maxpacketsize = PACKET_SIZE_8;
+ } else {
+ dev->descriptor.bMaxPacketSize0 = 64;
+ dev->maxpacketsize = PACKET_SIZE_64;
+ }
+ dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
+ dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
if (do_read) {
int err;
}
static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read,
- struct usb_device *parent, int portnr)
+ struct usb_device *parent)
{
int err;
err = usb_setup_descriptor(dev, do_read);
if (err)
return err;
- err = usb_legacy_port_reset(parent, portnr);
+ err = usb_hub_port_reset(dev, parent);
if (err)
return err;
}
int usb_setup_device(struct usb_device *dev, bool do_read,
- struct usb_device *parent, int portnr)
+ struct usb_device *parent)
{
int addr;
int ret;
addr = dev->devnum;
dev->devnum = 0;
- ret = usb_prepare_device(dev, addr, do_read, parent, portnr);
+ ret = usb_prepare_device(dev, addr, do_read, parent);
if (ret)
return ret;
ret = usb_select_config(dev);
#ifdef CONFIG_USB_XHCI
do_read = false;
#endif
- err = usb_setup_device(dev, do_read, dev->parent, dev->portnr);
+ err = usb_setup_device(dev, do_read, dev->parent);
if (err)
return err;