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/*
* Copyright : (C) 2022 Phytium Information Technology, Inc.
* All Rights Reserved.
*
* This program is OPEN SOURCE software: you can redistribute it and/or modify it
* under the terms of the Phytium Public License as published by the Phytium Technology Co.,Ltd,
* either version 1.0 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the Phytium Public License for more details.
*
*
* FilePath: fusb_generic_hub.c
* Date: 2022-02-11 13:33:11
* LastEditTime: 2022-02-18 09:19:27
* Description: This files is for implmentation of generic hub function
*
* Modify History:
* Ver Who Date Changes
* ----- ------ -------- --------------------------------------
* 1.0 Zhugengyu 2022/2/7 init commit
*/
#include "fsleep.h"
#include "fdebug.h"
#include "fusb.h"
#include "fusb_generic_hub.h"
#define FUSB_DEBUG_TAG "FUSB_HUB"
#define FUSB_ERROR(format, ...) FT_DEBUG_PRINT_E(FUSB_DEBUG_TAG, format, ##__VA_ARGS__)
#define FUSB_WARN(format, ...) FT_DEBUG_PRINT_W(FUSB_DEBUG_TAG, format, ##__VA_ARGS__)
#define FUSB_INFO(format, ...) FT_DEBUG_PRINT_I(FUSB_DEBUG_TAG, format, ##__VA_ARGS__)
#define FUSB_DEBUG(format, ...) FT_DEBUG_PRINT_D(FUSB_DEBUG_TAG, format, ##__VA_ARGS__)
void FUsbGenericHubDestory(FUsbDev *const dev)
{
FUsbGenericHub *const hub = FUSB_GEN_HUB_GET(dev);
FUsb *instace = dev->controller->usb;
if (!hub)
return;
/* First, detach all devices behind this hub */
int port;
for (port = 1; port <= hub->num_ports; ++port)
{
if (hub->ports[port] >= 0)
{
FUSB_INFO("generic_hub: Detachment at port %d ", port);
FUsbDetachDev(dev->controller, hub->ports[port]);
hub->ports[port] = FUSB_NO_DEV_ADDR;
}
}
/* Disable all ports */
if (hub->ops->disable_port)
{
for (port = 1; port <= hub->num_ports; ++port)
hub->ops->disable_port(dev, port);
}
FUSB_FREE(instace, hub->ports); // free(hub->ports);
FUSB_FREE(instace, hub); // free(hub);
}
static int FUsbGenericHubDebounce(FUsbDev *const dev, const int port)
{
FUsbGenericHub *const hub = FUSB_GEN_HUB_GET(dev);
const int step_ms = 1; /* linux uses 25ms, we're busy anyway */
const int at_least_ms = 100; /* 100ms as in usb20 spec 9.1.2 */
const int timeout_ms = 1500; /* linux uses this value */
int total_ms = 0;
int stable_ms = 0;
while (stable_ms < at_least_ms && total_ms < timeout_ms)
{
fsleep_millisec(step_ms);
const int changed = hub->ops->port_status_changed(dev, port);
const int connected = hub->ops->port_connected(dev, port);
if (changed < 0 || connected < 0)
return -1;
if (!changed && connected)
{
stable_ms += step_ms;
}
else
{
FUSB_INFO("generic_hub: Unstable connection at %d ",
port);
stable_ms = 0;
}
total_ms += step_ms;
}
if (total_ms >= timeout_ms)
FUSB_INFO("generic_hub: Debouncing timed out at %d ", port);
return 0; /* ignore timeouts, try to always go on */
}
int FUsbGenericHubWaitForPort(FUsbDev *const dev, const int port,
const int wait_for,
int (*const port_op)(FUsbDev *, int),
int timeout_steps, const int step_us)
{
int state;
do
{
state = port_op(dev, port);
if (state < 0)
return -1;
else if (!!state == wait_for)
return timeout_steps;
fsleep_microsec(step_us);
--timeout_steps;
}
while (timeout_steps);
return 0;
}
int FUsbGenericHubResetPort(FUsbDev *const dev, const int port)
{
FUsbGenericHub *const hub = FUSB_GEN_HUB_GET(dev);
if (hub->ops->start_port_reset(dev, port) < 0)
return -1;
/* wait for 10ms (usb20 spec 11.5.1.5: reset should take 10 to 20ms) */
fsleep_millisec(10);
/* now wait 12ms for the hub to finish the reset */
const int ret = FUsbGenericHubWaitForPort(
/* time out after 120 * 100us = 12ms */
dev, port, 0, hub->ops->port_in_reset, 120, 100);
if (ret < 0)
return -1;
else if (!ret)
FUSB_INFO("generic_hub: Reset timed out at port %d ", port);
return 0; /* ignore timeouts, try to always go on */
}
static int FUsbGenericHubDetachDev(FUsbDev *const dev, const int port)
{
FUsbGenericHub *const hub = FUSB_GEN_HUB_GET(dev);
FUsbDetachDev(dev->controller, hub->ports[port]);
hub->ports[port] = FUSB_NO_DEV_ADDR;
return 0;
}
static int FUsbGenericHubAttachDev(FUsbDev *const dev, const int port)
{
FUsbGenericHub *const hub = FUSB_GEN_HUB_GET(dev);
if (FUsbGenericHubDebounce(dev, port) < 0)
return -1;
if (hub->ops->reset_port)
{
if (hub->ops->reset_port(dev, port) < 0)
return -1;
if (!hub->ops->port_connected(dev, port))
{
FUSB_INFO(
"generic_hub: Port %d disconnected after "
"reset. Possibly upgraded, rescan required. ",
port);
return 0;
}
/* after reset the port will be enabled automatically */
const int ret = FUsbGenericHubWaitForPort(
/* time out after 1,000 * 10us = 10ms */
dev, port, 1, hub->ops->port_enabled, 1000, 10);
if (ret < 0)
return -1;
else if (!ret)
FUSB_INFO("generic_hub: Port %d still "
"disabled after 10ms ",
port);
}
const FUsbSpeed speed = hub->ops->port_speed(dev, port);
if (speed >= 0)
{
FUSB_DEBUG("generic_hub: Success at port %d ", port);
if (hub->ops->reset_port)
fsleep_millisec(10); /* Reset recovery time
(usb20 spec 7.1.7.5) */
hub->ports[port] = FUsbAttachDev(
dev->controller, dev->address, port, speed);
}
return 0;
}
int FUsbGenericHubScanPort(FUsbDev *const dev, const int port)
{
FUsbGenericHub *const hub = FUSB_GEN_HUB_GET(dev);
if (hub->ports[port] >= 0)
{
FUSB_INFO("generic_hub: Detachment at port %d ", port);
const int ret = FUsbGenericHubDetachDev(dev, port);
if (ret < 0)
return ret;
}
if (hub->ops->port_connected(dev, port))
{
FUSB_INFO("generic_hub: Attachment at port %d ", port);
return FUsbGenericHubAttachDev(dev, port);
}
return 0;
}
static void FUsbGenericHubPoll(FUsbDev *const dev)
{
FUsbGenericHub *const hub = FUSB_GEN_HUB_GET(dev);
if (!hub)
return;
if (hub->ops->hub_status_changed &&
hub->ops->hub_status_changed(dev) != FUSB_CC_SUCCESS)
{
return;
}
int port;
for (port = 1; port <= hub->num_ports; ++port)
{
const FUsbTransCode ret = hub->ops->port_status_changed(dev, port);
if (ret < 0)
{
FUSB_WARN("Transcode %d", ret);
return;
}
else if (ret == FUSB_CC_SUCCESS)
{
FUSB_INFO("generic_hub: Port change at %d ", port);
if (FUsbGenericHubScanPort(dev, port) < 0)
return;
}
}
}
int FUsbGenericHubInit(FUsbDev *const dev, const int num_ports,
const FUsbGenericHubOps *const ops)
{
int port;
FUsb *instance = dev->controller->usb;
dev->destroy = FUsbGenericHubDestory;
dev->poll = FUsbGenericHubPoll;
FASSERT(NULL == dev->data);
dev->data = FUSB_ALLOCATE(instance, sizeof(FUsbGenericHub), FUSB_DEFAULT_ALIGN);
if (NULL == dev->data)
{
FUSB_ERROR("generic_hub: ERROR: Out of memory ");
return -1;
}
FUsbGenericHub *const hub = FUSB_GEN_HUB_GET(dev);
hub->num_ports = num_ports;
FASSERT(NULL == hub->ports);
hub->ports = FUSB_ALLOCATE(instance, sizeof(*hub->ports) * (num_ports + 1), FUSB_DEFAULT_ALIGN);
hub->ops = ops;
if (NULL == hub->ports)
{
FUSB_ERROR("generic_hub: ERROR: Out of memory ");
FUSB_FREE(instance, dev->data);
dev->data = NULL;
return -1;
}
for (port = 1; port <= num_ports; ++port)
hub->ports[port] = FUSB_NO_DEV_ADDR;
/* Enable all ports */
if (ops->enable_port)
{
for (port = 1; port <= num_ports; ++port)
ops->enable_port(dev, port);
/* wait once for all ports */
fsleep_millisec(20);
}
return 0;
}
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