516 lines
16 KiB
C
516 lines
16 KiB
C
/*
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* Copyright : (C) 2022 Phytium Information Technology, Inc.
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* All Rights Reserved.
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*
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* This program is OPEN SOURCE software: you can redistribute it and/or modify it
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* under the terms of the Phytium Public License as published by the Phytium Technology Co.,Ltd,
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* either version 1.0 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the Phytium Public License for more details.
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*
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*
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* FilePath: fusb_hub.c
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* Date: 2022-02-11 13:33:07
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* LastEditTime: 2022-02-17 17:48:52
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* Description: This files is for implmentation of USB hub function
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* you may refer to chapter 11 Hub specification for details
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*
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* Modify History:
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* Ver Who Date Changes
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* ----- ------ -------- --------------------------------------
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* 1.0 zhugengyu 2022/2/7 init commit
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*/
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#include "fkernel.h"
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#include "fdebug.h"
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#include "fassert.h"
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#include "fusb_private.h"
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#include "fusb_generic_hub.h"
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#define FUSB_DEBUG_TAG "FUSB_HUB"
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#define FUSB_ERROR(format, ...) FT_DEBUG_PRINT_E(FUSB_DEBUG_TAG, format, ##__VA_ARGS__)
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#define FUSB_WARN(format, ...) FT_DEBUG_PRINT_W(FUSB_DEBUG_TAG, format, ##__VA_ARGS__)
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#define FUSB_INFO(format, ...) FT_DEBUG_PRINT_I(FUSB_DEBUG_TAG, format, ##__VA_ARGS__)
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#define FUSB_DEBUG(format, ...) FT_DEBUG_PRINT_D(FUSB_DEBUG_TAG, format, ##__VA_ARGS__)
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/* assume that FUSB_REQ_HOST_TO_DEVICE is overwritten if necessary */
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#define DR_PORT FUsbGenerateReqType(FUSB_REQ_HOST_TO_DEVICE, FUSB_REQ_TYPE_CLASS, FUSB_REQ_RECP_OTHER) /* 10100011B */
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#define DR_HUB FUsbGenerateReqType(FUSB_REQ_HOST_TO_DEVICE, FUSB_REQ_TYPE_CLASS, FUSB_REQ_RECP_DEV) /* 10100000B */
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#define FUSB_HUB_PORT_STATUS 0
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#define FUSB_HUB_PORT_CHANGE 1
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#define FUSB_HUB_PORT_BUF_LEN 2
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/* status (and status change) bits, refer to Table 10-10, Port Status Field in USB spec */
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#define FUSB_HUB_STATUS_PORT_CONNECTION BIT(0) /* reflects if device is currently connected to this port */
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#define FUSB_HUB_STATUS_PORT_ENABLE BIT(1) /* reflects if this port is enabled */
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#define FUSB_HUB_STATUS_PORT_SUSPEND BIT(2) /* reflects if this port is suspend, only for USB2 */
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#define FUSB_HUB_STATUS_PORT_OVER_CURRENT BIT(3) /* reports over-current conditions in this port */
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#define FUSB_HUB_STATUS_PORT_RESET BIT(4) /* reset signaling asserted */
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#define FUSB_HUB_STATUS_BH_PORT_RESET BIT(5) /* warm reset completed */
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#define FUSB_HUB_STATUS_PORT_LINK_STATE BIT(6) /* link state changed */
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#define FUSB_HUB_STATUS_PORT_PORT_CONFIG_ERROR BIT(7) /* port fails to config */
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/* feature selectors (for setting / clearing features), refer to USB spec. Table 10-17. Hub Class Feature Selectors for details */
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#define FUSB_HUB_SEL_PORT_RESET 4
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#define FUSB_HUB_SEL_PORT_POWER 8
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#define FUSB_HUB_SEL_C_PORT_CONNECTION 16
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#define FUSB_HUB_SEL_C_PORT_ENABLE 17 /* USB2 only */
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#define FUSB_HUB_SEL_C_PORT_SUSPEND 18 /* USB2 only */
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#define FUSB_HUB_SEL_C_PORT_OVER_CURRENT 19
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#define FUSB_HUB_SEL_C_PORT_RESET 20
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#define FUSB_HUB_SEL_C_PORT_LINK_STATE 25
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#define FUSB_HUB_SEL_C_PORT_CONFIG_ERROR 26
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#define FUSB_HUB_SEL_C_BH_PORT_RESET 27
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/* request type (USB 3.0 hubs only) */
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#define SET_HUB_DEPTH 12
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/**
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* @name: FUsbHubIntrEp
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* @msg: 获取USB Hub的中断端点
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* @return {FUsbEndpoint *} 中断类型的功能端点
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* @param {FUsbDev} *dev, Hub实例
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*/
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static FUsbEndpoint *FUsbHubIntrEp(FUsbDev *const dev)
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{
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FASSERT(dev);
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int i;
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for (i = 0; i < dev->num_endp; ++i)
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{
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if (dev->endpoints[i].type == FUSB_INTERRUPT_EP &&
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dev->endpoints[i].direction == FUSB_IN)
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{
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return &dev->endpoints[i];
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}
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}
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return NULL;
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}
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/**
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* @name: FUsbHubPortStatusChange
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* @msg: Usb Hub的Port状态变化回调函数
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* @return {FUsbTransCode} USB请求返回值
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* @param {FUsbDev} *dev, Hub实例
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* @param {int} port, Port号
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*/
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static FUsbTransCode FUsbHubPortStatusChange(FUsbDev *const dev, const int port)
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{
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FASSERT(dev);
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unsigned short buf[FUSB_HUB_PORT_BUF_LEN]; /* Hub Status and Change Status */
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FUsbTransCode ret = FUsbGetStatus(dev, port, DR_PORT, sizeof(buf), buf);
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if (ret >= FUSB_CC_ZERO_BYTES)
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{
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ret = buf[FUSB_HUB_PORT_CHANGE] & FUSB_HUB_STATUS_PORT_CONNECTION;
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if (ret)
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{
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ret = FUsbClearFeature(dev, port, FUSB_HUB_SEL_C_PORT_CONNECTION, DR_PORT);
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}
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}
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return ret;
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}
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/**
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* @name: FUsbHubPortConnected
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* @msg: Usb Hub的Port连接回调函数
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* @return {FUsbTransCode} USB请求返回值
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* @param {FUsbDev} *dev, Hub实例
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* @param {int} port, Port号
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*/
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static FUsbTransCode FUsbHubPortConnected(FUsbDev *const dev, const int port)
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{
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FASSERT(dev);
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unsigned short buf[FUSB_HUB_PORT_BUF_LEN]; /* Hub Status and Change Status */
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FUsbTransCode ret = FUsbGetStatus(dev, port, DR_PORT, sizeof(buf), buf);
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if (ret >= FUSB_CC_ZERO_BYTES)
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{
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ret = buf[FUSB_HUB_PORT_STATUS] & FUSB_HUB_STATUS_PORT_CONNECTION;
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}
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return ret;
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}
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/**
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* @name: FUsbHubPortInReset
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* @msg: 检查Hub port是否处于Reset状态
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* @return {FUsbTransCode} USB请求返回值
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* @param {FUsbDev} *dev, Hub实例
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* @param {int} port, Port号
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*/
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static FUsbTransCode FUsbHubPortInReset(FUsbDev *const dev, const int port)
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{
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FASSERT(dev);
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unsigned short buf[FUSB_HUB_PORT_BUF_LEN]; /* Hub Status and Change Status */
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FUsbTransCode ret = FUsbGetStatus(dev, port, DR_PORT, sizeof(buf), buf);
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if (ret >= FUSB_CC_ZERO_BYTES)
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{
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ret = buf[FUSB_HUB_PORT_STATUS] & FUSB_HUB_STATUS_PORT_RESET;
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}
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return ret;
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}
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/**
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* @name: FUsbHubPortEnabled
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* @msg: 检查Hub port是否已使能
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* @return {FUsbTransCode} USB请求返回值
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* @param {FUsbDev} *dev, Hub实例
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* @param {int} port, Port号
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*/
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static FUsbTransCode FUsbHubPortEnabled(FUsbDev *const dev, const int port)
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{
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FASSERT(dev);
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unsigned short buf[FUSB_HUB_PORT_BUF_LEN]; /* Hub Status and Change Status */
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FUsbTransCode ret = FUsbGetStatus(dev, port, DR_PORT, sizeof(buf), buf);
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if (ret >= FUSB_CC_ZERO_BYTES)
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{
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ret = buf[FUSB_HUB_PORT_STATUS] & FUSB_HUB_STATUS_PORT_ENABLE;
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}
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return ret;
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}
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/**
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* @name: FUsbHubPortSpeed
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* @msg: 获取Hub port的速度类型
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* @return {FUsbSpeed} Port的速度类型，支持SuperSpeed和HighSpeed
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* @param {FUsbDev} *dev, Hub实例
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* @param {int} port, Port号
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*/
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static FUsbSpeed FUsbHubPortSpeed(FUsbDev *const dev, const int port)
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{
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FASSERT(dev);
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unsigned short buf[FUSB_HUB_PORT_BUF_LEN]; /* Hub Status and Change Status */
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FUsbTransCode ret = FUsbGetStatus(dev, port, DR_PORT, sizeof(buf), buf);
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int speed;
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if (ret >= FUSB_CC_ZERO_BYTES && (buf[FUSB_HUB_PORT_STATUS] & FUSB_HUB_STATUS_PORT_ENABLE))
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{
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/* SuperSpeed hubs can only have SuperSpeed devices. */
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if (FUsbIsSuperSpeed(dev->speed))
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{
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return dev->speed;
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}
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/*[bit] 10 9 (USB 2.0 port status word)
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* 0 0 full speed
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* 0 1 low speed
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* 1 0 high speed
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* 1 1 invalid
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*/
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speed = (buf[FUSB_HUB_PORT_STATUS] >> 9) & 0x3;
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if (speed != 0x3) /* high-speed device */
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{
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return speed;
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}
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}
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return FUSB_UNKNOWN_SPEED;
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}
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/**
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* @name: FUsbHubEnablePort
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* @msg: 使能Hub port
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* @return {FUsbTransCode} USB请求返回值
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* @param {FUsbDev} *dev, Hub实例
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* @param {int} port, port号
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*/
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static FUsbTransCode FUsbHubEnablePort(FUsbDev *const dev, const int port)
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{
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FASSERT(dev);
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return FUsbSetFeature(dev, port, FUSB_HUB_SEL_PORT_POWER, DR_PORT);
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}
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/**
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* @name: FUsbHubStartPortReset
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* @msg: 开始Reset Hub port
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* @return {FUsbTransCode} USB请求返回值
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* @param {FUsbDev} *dev, Hub实例
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* @param {int} port, port号
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*/
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static FUsbTransCode FUsbHubStartPortReset(FUsbDev *const dev, const int port)
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{
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FASSERT(dev);
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return FUsbSetFeature(dev, port, FUSB_HUB_SEL_PORT_RESET, DR_PORT);
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}
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static void FUsbHubSetHubDepth(FUsbDev *const dev)
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{
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FASSERT(dev);
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FUsbDevReq dr =
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{
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.bmRequestType = FUsbGenerateReqType(FUSB_REQ_HOST_TO_DEVICE,
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FUSB_REQ_TYPE_CLASS, FUSB_REQ_RECP_DEV),
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.bRequest = SET_HUB_DEPTH,
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.wValue = 0,
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.wIndex = 0,
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.wLength = 0,
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};
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FUsbDev *parent = dev;
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FASSERT(dev->controller);
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while (parent->hub > 0)
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{
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FASSERT(dev->controller->devices[parent->hub]);
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parent = dev->controller->devices[parent->hub];
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dr.wValue++;
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}
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FUsbTransCode ret = dev->controller->control(dev, FUSB_OUT, sizeof(dr), &dr, 0, NULL);
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if (ret < FUSB_CC_ZERO_BYTES)
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{
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FUSB_ERROR("Failed SET_HUB_DEPTH(%d) on hub %d: %d ",
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dr.wValue, dev->address, ret);
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}
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return;
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}
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static const FUsbGenericHubOps FUSB_HUB_OPS =
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{
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.hub_status_changed = NULL,
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.port_status_changed = FUsbHubPortStatusChange,
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.port_connected = FUsbHubPortConnected,
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.port_in_reset = FUsbHubPortInReset,
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.port_enabled = FUsbHubPortEnabled,
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.port_speed = FUsbHubPortSpeed,
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.enable_port = FUsbHubEnablePort,
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.disable_port = NULL,
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.start_port_reset = FUsbHubStartPortReset,
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.reset_port = FUsbGenericHubResetPort,
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};
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/* Clear CSC if set and enumerate port if it's connected regardless of change
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bits. Some broken hubs don't set CSC if already connected during reset. */
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static void FUsbHubPortInit(FUsbDev *const dev, const int port)
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{
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FASSERT(dev);
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unsigned short buf[FUSB_HUB_PORT_BUF_LEN]; /* Hub Status and Change Status */
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FUsbTransCode ret = FUsbGetStatus(dev, port, DR_PORT, sizeof(buf), buf);
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if (ret < FUSB_CC_ZERO_BYTES)
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{
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return;
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}
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if (buf[FUSB_HUB_PORT_CHANGE] & FUSB_HUB_STATUS_PORT_CONNECTION)
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{
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FUsbClearFeature(dev, port, FUSB_HUB_SEL_C_PORT_CONNECTION, DR_PORT);
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}
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if (buf[FUSB_HUB_PORT_STATUS] & FUSB_HUB_STATUS_PORT_CONNECTION)
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{
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FUSB_INFO("Usb hub: Port coldplug at %d ", port);
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FUsbGenericHubScanPort(dev, port);
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}
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return;
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}
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/**
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* @name: FUsbHubHandlePortChange
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* @msg: Hub端口状态变化的处理回调函数
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* @return {*}
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* @param {FUsbDev} *dev
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* @param {int} port
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*/
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static FUsbTransCode FUsbHubHandlePortChange(FUsbDev *const dev, const int port)
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{
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FASSERT(dev);
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static const struct
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{
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unsigned short change_bit;
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unsigned short clear_sel;
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} change_bits[] =
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{
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{FUSB_HUB_STATUS_PORT_CONNECTION, FUSB_HUB_SEL_C_PORT_CONNECTION},
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{FUSB_HUB_STATUS_PORT_ENABLE, FUSB_HUB_SEL_C_PORT_ENABLE},
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{FUSB_HUB_STATUS_PORT_SUSPEND, FUSB_HUB_SEL_C_PORT_SUSPEND},
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{FUSB_HUB_STATUS_PORT_OVER_CURRENT, FUSB_HUB_SEL_C_PORT_OVER_CURRENT},
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{FUSB_HUB_STATUS_PORT_RESET, FUSB_HUB_SEL_C_PORT_RESET},
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{FUSB_HUB_STATUS_BH_PORT_RESET, FUSB_HUB_SEL_C_BH_PORT_RESET},
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{FUSB_HUB_STATUS_PORT_LINK_STATE, FUSB_HUB_SEL_C_PORT_LINK_STATE},
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{FUSB_HUB_STATUS_PORT_PORT_CONFIG_ERROR, FUSB_HUB_SEL_C_PORT_CONFIG_ERROR},
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};
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FUsbTransCode ret = 0;
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unsigned int i;
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unsigned short checked_bits = 0;
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unsigned short buf[FUSB_HUB_PORT_BUF_LEN] = {0, 0}; /* Hub Status and Change Status */
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ret = FUsbGetStatus(dev, port, DR_PORT, sizeof(buf), buf);
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if (ret < FUSB_CC_ZERO_BYTES)
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{
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return ret;
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}
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/*
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* Second word holds the change bits. The interrupt transfer shows
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* a logical or of these bits, so we have to clear them all.
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*/
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for (i = 0; i < ARRAY_SIZE(change_bits); ++i)
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{
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if (buf[FUSB_HUB_PORT_CHANGE] & change_bits[i].change_bit)
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{
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/* clear feature if specific change bit = 1 */
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FUsbClearFeature(dev, port, change_bits[i].clear_sel, DR_PORT);
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}
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checked_bits |= change_bits[i].change_bit;
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}
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if (buf[FUSB_HUB_PORT_CHANGE] & ~checked_bits)
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{
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FUSB_DEBUG("Spurious change bit at port %d ", port);
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}
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/* Now, handle connection changes. */
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if (buf[FUSB_HUB_PORT_CHANGE] & FUSB_HUB_STATUS_PORT_CONNECTION)
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{
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FUSB_DEBUG("Port change at %d ", port);
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ret = FUsbGenericHubScanPort(dev, port);
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}
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return ret;
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}
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/**
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* @name: FUsbHubPoll
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* @msg: 轮询Hub的所有端口，检查端口状态变化
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* @return {*}
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* @param {FUsbDev} *dev, Hub设备实例
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*/
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static void FUsbHubPoll(FUsbDev *const dev)
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{
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FASSERT(dev);
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int port, i;
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u8 buf[32] = {0};
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const u8 *ibuf;
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/* First, gather all change bits from finished interrupt transfers. */
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const size_t port_bytes = min(ARRAY_SIZE(buf),
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(size_t)DIV_ROUND_UP(FUSB_GEN_HUB_GET(dev)->num_ports + 1, 8));
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while (NULL != (ibuf = dev->controller->poll_intr_queue(FUSB_GEN_HUB_GET(dev)->data)))
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{
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for (i = 0; (size_t)i < port_bytes; ++i)
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{
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buf[i] |= ibuf[i];
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}
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}
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for (port = 1; port <= FUSB_GEN_HUB_GET(dev)->num_ports; ++port)
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{
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/* ports start at bit1; bit0 is hub status change */
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if (buf[port / 8] & (1 << (port % 8)))
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{
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if (FUsbHubHandlePortChange(dev, port) < 0)
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{
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return;
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}
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}
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}
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return;
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}
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/**
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* @name: FUsbHubDestory
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* @msg: USB Hub的去初始化函数
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* @return {*}
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* @param {FUsbDev} *dev, Hub设备实例
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*/
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static void FUsbHubDestory(FUsbDev *const dev)
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{
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FASSERT(dev);
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FUsbEndpoint *const intr_ep = FUsbHubIntrEp(dev);
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FASSERT(intr_ep); /* interrupt ep must exists */
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dev->controller->destroy_intr_queue(intr_ep, FUSB_GEN_HUB_GET(dev)->data);
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FUsbGenericHubDestory(dev);
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}
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/**
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* @name: FUsbHubInit
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* @msg: USB Hub的初始化函数，由应用程序注册到FUSB框架中
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* @return {*}
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* @param {FUsbDev} *dev, Hub设备实例
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*/
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void FUsbHubInit(FUsbDev *dev)
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{
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FASSERT(dev);
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FUsbEndpoint *const intr_ep = FUsbHubIntrEp(dev); /* get the first intrrupt ep found */
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if (NULL == intr_ep)
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{
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FUSB_ERROR("No interrupt-in endpoint found ");
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return;
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}
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FASSERT(dev->controller);
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/* Get number of ports from hub descriptor */
|
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int type = FUsbIsSuperSpeed(dev->speed) ? FUSB_DESC_TYPE_SUPER_SPEED_HUB : FUSB_DESC_TYPE_HUB; /* similar enough */
|
||
FUsbHubDescriptor desc; /* won't fit the whole thing, we don't care */
|
||
if (FUsbGetDescriptor(dev, FUsbGenerateReqType(FUSB_REQ_DEVICE_TO_HOST, FUSB_REQ_TYPE_CLASS, FUSB_REQ_RECP_DEV), type, 0, &desc, sizeof(desc)) != sizeof(desc))
|
||
{
|
||
FUSB_ERROR("FUsbGetDescriptor(HUB) failed ");
|
||
FUsbDetachDev(dev->controller, dev->address);
|
||
return;
|
||
}
|
||
|
||
if (FUsbIsSuperSpeed(dev->speed))
|
||
{
|
||
FUsbHubSetHubDepth(dev);
|
||
}
|
||
|
||
/*
|
||
* Register interrupt transfer:
|
||
* one bit per port + one bit for the hub,
|
||
* 20 transfers in the queue, like our HID driver,
|
||
* one transfer per 256ms
|
||
*/
|
||
void *const intrq = dev->controller->create_intr_queue(
|
||
intr_ep, intr_ep->maxpacketsize, 20, 256);
|
||
if (NULL == intrq)
|
||
{
|
||
FUsbDetachDev(dev->controller, dev->address);
|
||
return;
|
||
}
|
||
|
||
/*
|
||
* Limit the number of ports by the max packet size of
|
||
* the interrupt endpoint. This shouldn't be necessary
|
||
* but prevents a potential overflow in FUsbHubPoll().
|
||
*/
|
||
const unsigned int num_ports =
|
||
min((int)desc.bNbrPorts, intr_ep->maxpacketsize * 8 - 1);
|
||
if (FUsbGenericHubInit(dev, num_ports, &FUSB_HUB_OPS))
|
||
{
|
||
dev->controller->destroy_intr_queue(intr_ep, intrq);
|
||
FUsbDetachDev(dev->controller, dev->address);
|
||
return;
|
||
}
|
||
|
||
unsigned int port;
|
||
for (port = 1; port <= num_ports; ++port)
|
||
{
|
||
FUsbHubPortInit(dev, port);
|
||
}
|
||
|
||
FUSB_GEN_HUB_GET(dev)->data = intrq;
|
||
dev->poll = FUsbHubPoll;
|
||
dev->destroy = FUsbHubDestory;
|
||
|
||
return;
|
||
}
|