543 lines
15 KiB
C
543 lines
15 KiB
C
/*
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* HUB "Driver"
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* Probes device for being a hub and configure it
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*/
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#include <stdint.h>
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#include "bas_string.h"
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#include "bas_printf.h"
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#include "util.h" /* for byte swap funcs */
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#include "wait.h"
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#include <stdarg.h>
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#include "usb.h"
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#include "usb_hub.h"
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#define DEBUG_HUB
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#ifdef DEBUG_HUB
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#define dbg(format, arg...) do { xprintf("DEBUG: %s(): " format, __FUNCTION__, ##arg); } while (0)
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#else
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#define dbg(format, arg...) do { ; } while (0)
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#endif /* DEBUG_HUB */
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static struct usb_hub_device hub_dev[USB_MAX_BUS][USB_MAX_HUB];
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static int usb_hub_index[USB_MAX_BUS];
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int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
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{
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return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
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USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB, USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
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}
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int usb_clear_hub_feature(struct usb_device *dev, int feature)
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{
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return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature, 0, NULL, 0, USB_CNTL_TIMEOUT);
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}
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int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
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{
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return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT);
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}
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int usb_set_port_feature(struct usb_device *dev, int port, int feature)
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{
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return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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USB_REQ_SET_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT);
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}
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int usb_get_hub_status(struct usb_device *dev, void *data)
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{
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return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
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USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0, data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
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}
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int usb_get_port_status(struct usb_device *dev, int port, void *data)
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{
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return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
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USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port, data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
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}
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static void usb_hub_power_on(struct usb_hub_device *hub)
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{
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int i;
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struct usb_device *dev;
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dev = hub->pusb_dev;
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/* Enable power to the ports */
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dbg("enabling power on all ports\r\n");
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for (i = 0; i < dev->maxchild; i++)
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{
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usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
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dbg("port %d returns %lX\r\n", i + 1, dev->status);
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wait(hub->desc.bPwrOn2PwrGood * 2 * 1000);
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}
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}
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void usb_hub_reset(int bus_index)
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{
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usb_hub_index[bus_index] = 0;
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}
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struct usb_hub_device *usb_hub_allocate(void)
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{
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if (usb_hub_index[bus_index] < USB_MAX_HUB)
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return &hub_dev[bus_index][usb_hub_index[bus_index]++];
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dbg("ERROR: USB_MAX_HUB (%d) reached\r\n", USB_MAX_HUB);
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return NULL;
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}
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#define MAX_TRIES 5
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static inline char *portspeed(int portstatus)
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{
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if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
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return "480 Mb/s";
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else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
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return "1.5 Mb/s";
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else
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return "12 Mb/s";
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}
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int hub_port_reset(struct usb_device *dev, int port, unsigned short *portstat)
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{
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int tries;
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struct usb_port_status portsts;
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unsigned short portstatus, portchange;
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dbg("hub_port_reset: resetting port %d...\r\n", port + 1);
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for (tries = 0; tries < MAX_TRIES; tries++)
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{
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usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
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#ifdef USB_POLL_HUB
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if (pxCurrentTCB != NULL)
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vTaskDelay((200*configTICK_RATE_HZ)/1000);
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else
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#endif
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wait(10000);
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if (usb_get_port_status(dev, port + 1, &portsts) < 0)
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{
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dbg("get_port_status failed status %lX\r\n", dev->status);
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return -1;
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}
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portstatus = swpw(portsts.wPortStatus);
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portchange = swpw(portsts.wPortChange);
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dbg("USB %d portstatus 0x%x, change 0x%x, %s\r\n", dev->usbnum, portstatus, portchange, portspeed(portstatus));
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dbg("STAT_C_CONNECTION = %d STAT_CONNECTION = %d USB_PORT_STAT_ENABLE = %d\r\n",
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(portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
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(portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
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(portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
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if ((portchange & USB_PORT_STAT_C_CONNECTION) || !(portstatus & USB_PORT_STAT_CONNECTION))
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return -1;
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if (portstatus & USB_PORT_STAT_ENABLE)
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break;
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#ifdef USB_POLL_HUB
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if (pxCurrentTCB != NULL)
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vTaskDelay((200*configTICK_RATE_HZ)/1000);
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else
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#endif
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wait(20000);
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}
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if (tries == MAX_TRIES)
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{
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dbg("USB %d, cannot enable port %d after %d retries, disabling port.\r\n", dev->usbnum, port + 1, MAX_TRIES);
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dbg("Maybe the USB cable is bad?\r\n");
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return -1;
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}
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usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
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*portstat = portstatus;
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return 0;
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}
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void usb_hub_port_connect_change(struct usb_device *dev, int port)
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{
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struct usb_device *usb;
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struct usb_port_status portsts;
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unsigned short portstatus;
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/* Check status */
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if (usb_get_port_status(dev, port + 1, &portsts) < 0)
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{
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dbg("USB %d get_port_status failed\r\n", dev->usbnum);
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return;
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}
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portstatus = swpw(portsts.wPortStatus);
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#ifdef USB_DEBUG
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{
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unsigned short portchange;
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portchange = swpw(portsts.wPortChange);
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dbg("USB %d, portstatus %x, change %x, %s\r\n", dev->usbnum, portstatus, portchange, portspeed(portstatus));
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}
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#endif /* USB_DEBUG */
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/* Clear the connection change status */
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usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
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/* Disconnect any existing devices under this port */
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if (((!(portstatus & USB_PORT_STAT_CONNECTION))
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&& (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port]))
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{
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dbg("USB %d port %i disconnected\r\n", dev->usbnum, port + 1);
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usb_disconnect(&dev->children[port]);
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/* Return now if nothing is connected */
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if (!(portstatus & USB_PORT_STAT_CONNECTION))
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return;
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}
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#ifdef USB_POLL_HUB
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if (pxCurrentTCB != NULL)
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vTaskDelay((200*configTICK_RATE_HZ)/1000);
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else
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#endif
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wait(2000);
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/* Reset the port */
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if (hub_port_reset(dev, port, &portstatus) < 0)
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{
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dbg("USB %d cannot reset port %i!?\r\n", dev->usbnum, port + 1);
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return;
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}
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#ifdef USB_POLL_HUB
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if (pxCurrentTCB != NULL)
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vTaskDelay((200*configTICK_RATE_HZ)/1000);
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else
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#endif
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wait(2000);
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/* Allocate a new device struct for it */
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usb = usb_alloc_new_device(dev->usbnum, dev->priv_hcd);
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if (portstatus & USB_PORT_STAT_HIGH_SPEED)
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usb->speed = USB_SPEED_HIGH;
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else if (portstatus & USB_PORT_STAT_LOW_SPEED)
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usb->speed = USB_SPEED_LOW;
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else
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usb->speed = USB_SPEED_FULL;
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dbg("usb=%p\r\n", usb);
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dev->children[port] = usb;
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usb->parent = dev;
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/* Run it through the hoops (find a driver, etc) */
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if (usb_new_device(usb))
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{
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/* Woops, disable the port */
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dbg("USB %d hub: disabling port %d\r\n", dev->usbnum, port + 1);
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usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
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}
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#ifdef USB_POLL_HUB
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else if (pxCurrentTCB != NULL)
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{
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#ifdef CONFIG_USB_KEYBOARD
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usb_kbd_register(usb);
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#endif /* CONFIG_USB_KEYBOARD */
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#ifdef CONFIG_USB_MOUSE
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usb_mouse_register(usb);
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#endif /* CONFIG_USB_MOUSE */
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#ifdef CONFIG_USB_STORAGE
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usb_stor_register(usb);
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#endif /* CONFIG_USB_STORAGE */
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}
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#endif
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}
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static void usb_hub_events(struct usb_device *dev)
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{
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int i;
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struct usb_hub_device *hub = dev->hub;
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if (hub == NULL)
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return;
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for (i = 0; i < dev->maxchild; i++)
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{
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struct usb_port_status portsts;
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unsigned short portstatus, portchange;
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if (usb_get_port_status(dev, i + 1, &portsts) < 0)
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{
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dbg("get_port_status failed\r\n");
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continue;
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}
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portstatus = swpw(portsts.wPortStatus);
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portchange = swpw(portsts.wPortChange);
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dbg("USB %d Port %d Status %X Change %X\r\n", dev->usbnum, i + 1, portstatus, portchange);
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if (portchange & USB_PORT_STAT_C_CONNECTION)
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{
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dbg("USB %d port %d connection change\r\n", dev->usbnum, i + 1);
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usb_hub_port_connect_change(dev, i);
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}
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if (portchange & USB_PORT_STAT_C_ENABLE)
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{
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dbg("USB %d port %d enable change, status %x\r\n", dev->usbnum, i + 1, portstatus);
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usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_ENABLE);
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/* EM interference sometimes causes bad shielded USB
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* devices to be shutdown by the hub, this hack enables
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* them again. Works at least with mouse driver */
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if (!(portstatus & USB_PORT_STAT_ENABLE) && (portstatus & USB_PORT_STAT_CONNECTION) && ((dev->children[i])))
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{
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dbg("USB %d already running port %i disabled by hub (EMI?), re-enabling...\r\n", dev->usbnum, i + 1);
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usb_hub_port_connect_change(dev, i);
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}
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}
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if (portstatus & USB_PORT_STAT_SUSPEND)
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{
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dbg("USB %d port %d suspend change\r\n", dev->usbnum, i + 1);
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usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_SUSPEND);
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}
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if (portchange & USB_PORT_STAT_C_OVERCURRENT)
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{
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dbg("USB %d port %d over-current change\r\n", dev->usbnum, i + 1);
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usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_OVER_CURRENT);
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usb_hub_power_on(hub);
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}
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if (portchange & USB_PORT_STAT_C_RESET)
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{
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dbg("USB %d port %d reset change\r\n", dev->usbnum, i + 1);
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usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);
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}
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} /* end for i all ports */
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}
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#ifdef USB_POLL_HUB
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void usb_poll_hub_task(void *pvParameters)
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{
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int index_bus = 0;
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portTickType timeout = configTICK_RATE_HZ/10;
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if (pvParameters);
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while(1)
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{
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if (xQueueAltReceive(queue_poll_hub, &index_bus, timeout) == pdPASS)
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{
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if ((index_bus >= 0) && (index_bus < USB_MAX_BUS) && (controller_priv[index_bus] != NULL))
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{
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dbg("USB %d event change\r\n", index_bus);
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#ifdef CONFIG_USB_INTERRUPT_POLLING
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*vblsem = 0;
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#endif
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usb_hub_events(&usb_dev[index_bus * USB_MAX_DEVICE]);
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#ifdef CONFIG_USB_INTERRUPT_POLLING
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*vblsem = 1;
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#endif
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}
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}
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else /* timeout */
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{
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int i;
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#ifdef CONFIG_USB_INTERRUPT_POLLING
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*vblsem = 0;
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#endif
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for (i = 0; i < USB_MAX_BUS ; i++)
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{
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if (controller_priv[i] != NULL)
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usb_hub_events(&usb_dev[i * USB_MAX_DEVICE]);
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}
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#ifdef CONFIG_USB_INTERRUPT_POLLING
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*vblsem = 1;
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#endif
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}
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timeout = portMAX_DELAY;
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}
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}
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#endif /* USB_POLL_HUB */
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int usb_hub_configure(struct usb_device *dev)
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{
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unsigned char *buffer, *bitmap;
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struct usb_hub_descriptor *descriptor;
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int i;
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struct usb_hub_device *hub;
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/* "allocate" Hub device */
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hub = usb_hub_allocate();
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dev->hub = hub;
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if (hub == NULL)
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return -1;
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hub->pusb_dev = dev;
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buffer = (unsigned char *) driver_mem_alloc(USB_BUFSIZ);
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if (buffer == NULL)
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{
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dbg("driver_mem_alloc() failure\r\n");
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return -1;
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}
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/* Get the the hub descriptor */
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if (usb_get_hub_descriptor(dev, buffer, 4) < 0)
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{
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dbg("failed to get hub descriptor, giving up %lX\r\n", dev->status);
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driver_mem_free(buffer);
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return -1;
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}
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dbg("bLength:%02X bDescriptorType:%02X bNbrPorts:%02X\r\n", buffer[0], buffer[1], buffer[2]);
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descriptor = (struct usb_hub_descriptor *)buffer;
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/* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
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i = descriptor->bLength;
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if (i > USB_BUFSIZ)
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{
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dbg("failed to get hub descriptor - too long: %d\r\n", descriptor->bLength);
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driver_mem_free(buffer);
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return -1;
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}
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if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0)
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{
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dbg("failed to get hub descriptor 2nd giving up %lX\r\n", dev->status);
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driver_mem_free(buffer);
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return -1;
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}
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memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
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/* adjust 16bit values */
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hub->desc.wHubCharacteristics = swpw(descriptor->wHubCharacteristics);
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/* set the bitmap */
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bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
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/* devices not removable by default */
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memset(bitmap, 0xff, (USB_MAXCHILDREN + 1 + 7) / 8);
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bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
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memset(bitmap, 0xff, (USB_MAXCHILDREN + 1 + 7) / 8); /* PowerMask = 1B */
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for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7) / 8); i++)
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hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
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for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
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hub->desc.DeviceRemovable[i] = descriptor->PortPowerCtrlMask[i];
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dev->maxchild = descriptor->bNbrPorts;
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dbg("USB %d, %d ports detected\r\n", dev->usbnum, dev->maxchild);
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if (dev->maxchild >= 10)
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dev->maxchild = 10;
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switch(hub->desc.wHubCharacteristics & HUB_CHAR_LPSM)
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{
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case 0x00: dbg("ganged power switching\r\n"); break;
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case 0x01: dbg("individual port power switching\r\n"); break;
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case 0x02:
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case 0x03: dbg("unknown reserved power switching mode\r\n"); break;
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}
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if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
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{
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dbg("part of a compound device\r\n");
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}
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else
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{
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dbg("standalone hub\r\n");
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}
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switch(hub->desc.wHubCharacteristics & HUB_CHAR_OCPM)
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{
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case 0x00: dbg("global over-current protection\r\n"); break;
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case 0x08: dbg("individual port over-current protection\r\n"); break;
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case 0x10:
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case 0x18: dbg("no over-current protection\r\n"); break;
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}
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dbg("power on to power good time: %dms\r\n", descriptor->bPwrOn2PwrGood * 2);
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dbg("hub controller current requirement: %dmA\r\n", descriptor->bHubContrCurrent);
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for (i = 0; i < dev->maxchild; i++)
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{
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dbg("USB %d port %d is%s removable\r\n", dev->usbnum, i + 1, hub->desc.DeviceRemovable[(i + 1) / 8] & (1 << ((i + 1) % 8)) ? " not" : "");
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}
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if (sizeof(struct usb_hub_status) > USB_BUFSIZ)
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{
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dbg("usb_hub_configure: failed to get Status - too long: %d\r\n", descriptor->bLength);
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driver_mem_free(buffer);
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return -1;
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}
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if (usb_get_hub_status(dev, buffer) < 0)
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{
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dbg("usb_hub_configure: failed to get Status %lX\r\n", dev->status);
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driver_mem_free(buffer);
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return -1;
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}
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#ifdef USB_DEBUG
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{
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struct usb_hub_status *hubsts;
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hubsts = (struct usb_hub_status *)buffer;
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dbg("get_hub_status returned status %X, change %X\r\n",
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swpw(hubsts->wHubStatus), swpw(hubsts->wHubChange));
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dbg("local power source is %s\r\n",
|
|
(swpw(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? "lost (inactive)" : "good");
|
|
dbg("%sover-current condition exists\r\n",
|
|
(swpw(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? "" : "no ");
|
|
}
|
|
#endif /* USB_DEBUG */
|
|
|
|
usb_hub_power_on(hub);
|
|
|
|
#ifdef USB_POLL_HUB
|
|
if ((queue_poll_hub == NULL) && (pxCurrentTCB != NULL))
|
|
{
|
|
queue_poll_hub = xQueueCreate(64, sizeof(int));
|
|
if (queue_poll_hub != NULL)
|
|
{
|
|
/* Create poll/event task */
|
|
if (xTaskCreate(usb_poll_hub_task, (void *)"USBHub", configMINIMAL_STACK_SIZE, NULL, 16, NULL) != pdPASS)
|
|
{
|
|
vQueueDelete(queue_poll_hub);
|
|
queue_poll_hub = NULL;
|
|
}
|
|
}
|
|
vTaskDelay(configTICK_RATE_HZ);
|
|
}
|
|
if (queue_poll_hub == NULL)
|
|
#endif
|
|
usb_hub_events(dev);
|
|
driver_mem_free(buffer);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int usb_hub_probe(struct usb_device *dev, int ifnum)
|
|
{
|
|
struct usb_interface_descriptor *iface;
|
|
struct usb_endpoint_descriptor *ep;
|
|
int ret;
|
|
|
|
iface = &dev->config.if_desc[ifnum];
|
|
|
|
/* Is it a hub? */
|
|
if (iface->bInterfaceClass != USB_CLASS_HUB)
|
|
{
|
|
dbg("iface->bInterfaceClass != USB_CLASS_HUB (%d), %d instead\r\n", USB_CLASS_HUB, iface->bInterfaceClass);
|
|
return 0;
|
|
}
|
|
|
|
/* Some hubs have a subclass of 1, which AFAICT according to the */
|
|
/* specs is not defined, but it works */
|
|
if ((iface->bInterfaceSubClass != 0) && (iface->bInterfaceSubClass != 1))
|
|
return 0;
|
|
|
|
/* Multiple endpoints? What kind of mutant ninja-hub is this? */
|
|
if (iface->bNumEndpoints != 1)
|
|
return 0;
|
|
|
|
ep = &iface->ep_desc[0];
|
|
|
|
/* Output endpoint? Curiousier and curiousier.. */
|
|
if (!(ep->bEndpointAddress & USB_DIR_IN))
|
|
return 0;
|
|
|
|
/* If it's not an interrupt endpoint, we'd better punt! */
|
|
if ((ep->bmAttributes & 3) != 3)
|
|
return 0;
|
|
|
|
/* We found a hub */
|
|
dbg("USB %d hub found\r\n", dev->usbnum);
|
|
ret = usb_hub_configure(dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|