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/*****************************************************************************
* Copyright (c) 2013 IBM Corporation
* All rights reserved.
* This program and the accompanying materials
* are made available under the terms of the BSD License
* which accompanies this distribution, and is available at
* http://www.opensource.org/licenses/bsd-license.php
*
* Contributors:
* IBM Corporation - initial implementation
*****************************************************************************/
#include <stdio.h>
#include <string.h>
#include "usb-core.h"
#undef HUB_DEBUG
//#define HUB_DEBUG
#ifdef HUB_DEBUG
#define dprintf(_x ...) do { printf(_x); } while(0)
#else
#define dprintf(_x ...)
#endif
/*
* USB Spec 1.1
* 11.16.2 Class-specific Requests
*/
struct usb_hub_ps {
uint16_t wPortStatus;
uint16_t wPortChange;
} __attribute__((packed));
#define HUB_PS_CONNECTION (1 << 0)
#define HUB_PS_ENABLE (1 << 1)
#define HUB_PS_SUSPEND (1 << 2)
#define HUB_PS_OVER_CURRENT (1 << 3)
#define HUB_PS_RESET (1 << 4)
#define HUB_PS_POWER (1 << 8)
#define HUB_PS_LOW_SPEED (1 << 9)
#define HUB_PF_CONNECTION 0
#define HUB_PF_ENABLE 1
#define HUB_PF_SUSPEND 2
#define HUB_PF_OVER_CURRENT 3
#define HUB_PF_RESET 4
#define HUB_PF_POWER 8
#define HUB_PF_LOWSPEED 9
#define HUB_PF_C_CONNECTION 16
#define HUB_PF_C_ENABLE 17
#define HUB_PF_C_SUSPEND 18
#define HUB_PF_C_OVER_CURRENT 19
#define HUB_PF_C_RESET 20
static int usb_get_hub_desc(struct usb_dev *dev, void *data, size_t size)
{
struct usb_dev_req req;
if (!dev)
return false;
req.bmRequestType = REQT_DIR_IN | REQT_TYPE_CLASS | REQT_REC_DEVICE;
req.bRequest = REQ_GET_DESCRIPTOR;
req.wIndex = 0;
req.wLength = cpu_to_le16((uint16_t) size);
req.wValue = cpu_to_le16(DESCR_TYPE_HUB << 8);
return usb_send_ctrl(dev->control, &req, data);
}
static int hub_get_port_status(struct usb_dev *dev, int port, void *data, size_t size)
{
struct usb_dev_req req;
if (!dev)
return false;
req.bmRequestType = REQT_DIR_IN | REQT_TYPE_CLASS | REQT_REC_OTHER;
req.bRequest = REQ_GET_STATUS;
req.wValue = 0;
req.wIndex = cpu_to_le16((uint16_t)(port + 1));
req.wLength = cpu_to_le16((uint16_t)size);
return usb_send_ctrl(dev->control, &req, data);
}
static int hub_set_port_feature(struct usb_dev *dev, int port, int feature)
{
struct usb_dev_req req;
if (!dev)
return false;
req.bmRequestType = REQT_DIR_OUT | REQT_TYPE_CLASS | REQT_REC_OTHER;
req.bRequest = REQ_SET_FEATURE;
req.wLength = 0;
req.wValue = cpu_to_le16((uint16_t)feature);
req.wIndex = cpu_to_le16((uint16_t)(port + 1));
return usb_send_ctrl(dev->control, &req, NULL);
}
#if 0
static int hub_clear_port_feature(struct usb_dev *dev, int port, int feature)
{
struct usb_dev_req req;
if (!dev)
return false;
req.bmRequestType = REQT_DIR_OUT | REQT_TYPE_CLASS | REQT_REC_OTHER;
req.bRequest = REQ_CLEAR_FEATURE;
req.wLength = 0;
req.wValue = cpu_to_le16((uint16_t)feature);
req.wIndex = cpu_to_le16((uint16_t)(port + 1));
return usb_send_ctrl(dev->control, &req, NULL);
}
#endif
static int hub_check_port(struct usb_dev *dev, int port)
{
struct usb_hub_ps ps;
uint32_t time;
if (!hub_get_port_status(dev, port, &ps, sizeof(ps)))
return false;
dprintf("Port Status %04X Port Change %04X\n",
le16_to_cpu(ps.wPortStatus),
le16_to_cpu(ps.wPortChange));
if (!(le16_to_cpu(ps.wPortStatus) & HUB_PS_POWER)) {
hub_set_port_feature(dev, port, HUB_PF_POWER);
SLOF_msleep(100);
time = SLOF_GetTimer() + USB_TIMEOUT;
while (time > SLOF_GetTimer()) {
cpu_relax();
hub_get_port_status(dev, port, &ps, sizeof(ps));
if (le16_to_cpu(ps.wPortStatus) & HUB_PS_CONNECTION) {
dprintf("power on Port Status %04X Port Change %04X\n",
le16_to_cpu(ps.wPortStatus),
le16_to_cpu(ps.wPortChange));
break;
}
}
}
if (le16_to_cpu(ps.wPortStatus) & HUB_PS_CONNECTION) {
hub_set_port_feature(dev, port, HUB_PF_RESET);
SLOF_msleep(100);
time = SLOF_GetTimer() + USB_TIMEOUT;
while (time > SLOF_GetTimer()) {
cpu_relax();
hub_get_port_status(dev, port, &ps, sizeof(ps));
if (!(le16_to_cpu(ps.wPortStatus) & HUB_PS_RESET)) {
dprintf("reset Port Status %04X Port Change %04X\n",
le16_to_cpu(ps.wPortStatus),
le16_to_cpu(ps.wPortChange));
return true;
}
}
}
return false;
}
unsigned int usb_hub_init(void *hubdev)
{
struct usb_dev *dev = hubdev;
struct usb_dev_hub_descr hub;
struct usb_dev *newdev;
int i;
dprintf("%s: enter %p\n", __func__, dev);
if (!dev) {
printf("usb-hub: NULL\n");
return false;
}
memset(&hub, 0, sizeof(hub));
usb_get_hub_desc(dev, &hub, sizeof(hub));
dprintf("usb-hub: ports connected %d\n", hub.bNbrPorts);
for (i = 0; i < hub.bNbrPorts; i++) {
dprintf("usb-hub: ports scanning %d\n", i);
if (hub_check_port(dev, i)) {
dprintf("***********************************************\n");
dprintf("\t\tusb-hub: device found %d\n", i);
dprintf("***********************************************\n");
newdev = usb_devpool_get();
dprintf("usb-hub: allocated device %p\n", newdev);
newdev->hcidev = dev->hcidev;
if (!setup_new_device(newdev, i))
printf("usb-hub: unable to setup device on port %d\n", i);
}
}
return true;
}
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