1053 lines
27 KiB
C
1053 lines
27 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* aspeed-vhub -- Driver for Aspeed SoC "vHub" USB gadget
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*
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* hub.c - virtual hub handling
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*
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* Copyright 2017 IBM Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/list.h>
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#include <linux/interrupt.h>
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#include <linux/proc_fs.h>
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#include <linux/prefetch.h>
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#include <linux/clk.h>
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#include <linux/usb/gadget.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/regmap.h>
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#include <linux/dma-mapping.h>
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#include <linux/bcd.h>
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#include <linux/version.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include "vhub.h"
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/* usb 2.0 hub device descriptor
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*
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* A few things we may want to improve here:
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*
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* - We may need to indicate TT support
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* - We may need a device qualifier descriptor
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* as devices can pretend to be usb1 or 2
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* - Make vid/did overridable
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* - make it look like usb1 if usb1 mode forced
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*/
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#define KERNEL_REL bin2bcd(((LINUX_VERSION_CODE >> 16) & 0x0ff))
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#define KERNEL_VER bin2bcd(((LINUX_VERSION_CODE >> 8) & 0x0ff))
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enum {
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AST_VHUB_STR_INDEX_MAX = 4,
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AST_VHUB_STR_MANUF = 3,
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AST_VHUB_STR_PRODUCT = 2,
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AST_VHUB_STR_SERIAL = 1,
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};
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static const struct usb_device_descriptor ast_vhub_dev_desc = {
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.bLength = USB_DT_DEVICE_SIZE,
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.bDescriptorType = USB_DT_DEVICE,
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.bcdUSB = cpu_to_le16(0x0200),
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.bDeviceClass = USB_CLASS_HUB,
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.bDeviceSubClass = 0,
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.bDeviceProtocol = 1,
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.bMaxPacketSize0 = 64,
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.idVendor = cpu_to_le16(0x1d6b),
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.idProduct = cpu_to_le16(0x0107),
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.bcdDevice = cpu_to_le16(0x0100),
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.iManufacturer = AST_VHUB_STR_MANUF,
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.iProduct = AST_VHUB_STR_PRODUCT,
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.iSerialNumber = AST_VHUB_STR_SERIAL,
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.bNumConfigurations = 1,
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};
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/*
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* Configuration descriptor: same comments as above
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* regarding handling USB1 mode.
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*/
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/*
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* We don't use sizeof() as Linux definition of
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* struct usb_endpoint_descriptor contains 2
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* extra bytes
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*/
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#define AST_VHUB_CONF_DESC_SIZE (USB_DT_CONFIG_SIZE + \
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USB_DT_INTERFACE_SIZE + \
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USB_DT_ENDPOINT_SIZE)
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static const struct ast_vhub_full_cdesc ast_vhub_conf_desc = {
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.cfg = {
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.bLength = USB_DT_CONFIG_SIZE,
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.bDescriptorType = USB_DT_CONFIG,
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.wTotalLength = cpu_to_le16(AST_VHUB_CONF_DESC_SIZE),
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.bNumInterfaces = 1,
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.bConfigurationValue = 1,
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.iConfiguration = 0,
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.bmAttributes = USB_CONFIG_ATT_ONE |
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USB_CONFIG_ATT_SELFPOWER |
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USB_CONFIG_ATT_WAKEUP,
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.bMaxPower = 0,
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},
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.intf = {
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.bLength = USB_DT_INTERFACE_SIZE,
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.bDescriptorType = USB_DT_INTERFACE,
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.bInterfaceNumber = 0,
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.bAlternateSetting = 0,
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.bNumEndpoints = 1,
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.bInterfaceClass = USB_CLASS_HUB,
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.bInterfaceSubClass = 0,
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.bInterfaceProtocol = 0,
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.iInterface = 0,
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},
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.ep = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = 0x81,
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.bmAttributes = USB_ENDPOINT_XFER_INT,
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.wMaxPacketSize = cpu_to_le16(1),
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.bInterval = 0x0c,
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},
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};
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#define AST_VHUB_HUB_DESC_SIZE (USB_DT_HUB_NONVAR_SIZE + 2)
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static const struct usb_hub_descriptor ast_vhub_hub_desc = {
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.bDescLength = AST_VHUB_HUB_DESC_SIZE,
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.bDescriptorType = USB_DT_HUB,
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.bNbrPorts = AST_VHUB_NUM_PORTS,
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.wHubCharacteristics = cpu_to_le16(HUB_CHAR_NO_LPSM),
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.bPwrOn2PwrGood = 10,
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.bHubContrCurrent = 0,
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.u.hs.DeviceRemovable[0] = 0,
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.u.hs.DeviceRemovable[1] = 0xff,
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};
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/*
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* These strings converted to UTF-16 must be smaller than
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* our EP0 buffer.
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*/
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static const struct usb_string ast_vhub_str_array[] = {
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{
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.id = AST_VHUB_STR_SERIAL,
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.s = "00000000"
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},
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{
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.id = AST_VHUB_STR_PRODUCT,
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.s = "USB Virtual Hub"
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},
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{
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.id = AST_VHUB_STR_MANUF,
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.s = "Aspeed"
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},
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{ }
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};
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static const struct usb_gadget_strings ast_vhub_strings = {
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.language = 0x0409,
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.strings = (struct usb_string *)ast_vhub_str_array
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};
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static int ast_vhub_hub_dev_status(struct ast_vhub_ep *ep,
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u16 wIndex, u16 wValue)
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{
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u8 st0;
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EPDBG(ep, "GET_STATUS(dev)\n");
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/*
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* Mark it as self-powered, I doubt the BMC is powered off
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* the USB bus ...
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*/
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st0 = 1 << USB_DEVICE_SELF_POWERED;
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/*
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* Need to double check how remote wakeup actually works
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* on that chip and what triggers it.
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*/
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if (ep->vhub->wakeup_en)
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st0 |= 1 << USB_DEVICE_REMOTE_WAKEUP;
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return ast_vhub_simple_reply(ep, st0, 0);
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}
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static int ast_vhub_hub_ep_status(struct ast_vhub_ep *ep,
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u16 wIndex, u16 wValue)
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{
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int ep_num;
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u8 st0 = 0;
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ep_num = wIndex & USB_ENDPOINT_NUMBER_MASK;
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EPDBG(ep, "GET_STATUS(ep%d)\n", ep_num);
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/* On the hub we have only EP 0 and 1 */
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if (ep_num == 1) {
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if (ep->vhub->ep1_stalled)
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st0 |= 1 << USB_ENDPOINT_HALT;
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} else if (ep_num != 0)
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return std_req_stall;
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return ast_vhub_simple_reply(ep, st0, 0);
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}
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static int ast_vhub_hub_dev_feature(struct ast_vhub_ep *ep,
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u16 wIndex, u16 wValue,
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bool is_set)
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{
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EPDBG(ep, "%s_FEATURE(dev val=%02x)\n",
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is_set ? "SET" : "CLEAR", wValue);
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if (wValue != USB_DEVICE_REMOTE_WAKEUP)
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return std_req_stall;
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ep->vhub->wakeup_en = is_set;
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EPDBG(ep, "Hub remote wakeup %s\n",
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is_set ? "enabled" : "disabled");
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return std_req_complete;
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}
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static int ast_vhub_hub_ep_feature(struct ast_vhub_ep *ep,
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u16 wIndex, u16 wValue,
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bool is_set)
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{
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int ep_num;
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u32 reg;
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ep_num = wIndex & USB_ENDPOINT_NUMBER_MASK;
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EPDBG(ep, "%s_FEATURE(ep%d val=%02x)\n",
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is_set ? "SET" : "CLEAR", ep_num, wValue);
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if (ep_num > 1)
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return std_req_stall;
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if (wValue != USB_ENDPOINT_HALT)
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return std_req_stall;
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if (ep_num == 0)
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return std_req_complete;
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EPDBG(ep, "%s stall on EP 1\n",
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is_set ? "setting" : "clearing");
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ep->vhub->ep1_stalled = is_set;
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reg = readl(ep->vhub->regs + AST_VHUB_EP1_CTRL);
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if (is_set) {
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reg |= VHUB_EP1_CTRL_STALL;
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} else {
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reg &= ~VHUB_EP1_CTRL_STALL;
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reg |= VHUB_EP1_CTRL_RESET_TOGGLE;
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}
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writel(reg, ep->vhub->regs + AST_VHUB_EP1_CTRL);
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return std_req_complete;
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}
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static int ast_vhub_rep_desc(struct ast_vhub_ep *ep,
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u8 desc_type, u16 len)
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{
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size_t dsize;
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struct ast_vhub *vhub = ep->vhub;
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EPDBG(ep, "GET_DESCRIPTOR(type:%d)\n", desc_type);
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/*
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* Copy first to EP buffer and send from there, so
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* we can do some in-place patching if needed. We know
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* the EP buffer is big enough but ensure that doesn't
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* change. We do that now rather than later after we
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* have checked sizes etc... to avoid a gcc bug where
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* it thinks len is constant and barfs about read
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* overflows in memcpy.
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*/
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switch(desc_type) {
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case USB_DT_DEVICE:
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dsize = USB_DT_DEVICE_SIZE;
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memcpy(ep->buf, &vhub->vhub_dev_desc, dsize);
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BUILD_BUG_ON(dsize > sizeof(vhub->vhub_dev_desc));
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BUILD_BUG_ON(USB_DT_DEVICE_SIZE >= AST_VHUB_EP0_MAX_PACKET);
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break;
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case USB_DT_CONFIG:
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dsize = AST_VHUB_CONF_DESC_SIZE;
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memcpy(ep->buf, &vhub->vhub_conf_desc, dsize);
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BUILD_BUG_ON(dsize > sizeof(vhub->vhub_conf_desc));
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BUILD_BUG_ON(AST_VHUB_CONF_DESC_SIZE >= AST_VHUB_EP0_MAX_PACKET);
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break;
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case USB_DT_HUB:
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dsize = AST_VHUB_HUB_DESC_SIZE;
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memcpy(ep->buf, &vhub->vhub_hub_desc, dsize);
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BUILD_BUG_ON(dsize > sizeof(vhub->vhub_hub_desc));
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BUILD_BUG_ON(AST_VHUB_HUB_DESC_SIZE >= AST_VHUB_EP0_MAX_PACKET);
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break;
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default:
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return std_req_stall;
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}
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/* Crop requested length */
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if (len > dsize)
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len = dsize;
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/* Shoot it from the EP buffer */
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return ast_vhub_reply(ep, NULL, len);
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}
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static struct usb_gadget_strings*
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ast_vhub_str_of_container(struct usb_gadget_string_container *container)
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{
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return (struct usb_gadget_strings *)container->stash;
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}
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static int ast_vhub_collect_languages(struct ast_vhub *vhub, void *buf,
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size_t size)
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{
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int rc, hdr_len, nlangs, max_langs;
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struct usb_gadget_strings *lang_str;
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struct usb_gadget_string_container *container;
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struct usb_string_descriptor *sdesc = buf;
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nlangs = 0;
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hdr_len = sizeof(struct usb_descriptor_header);
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max_langs = (size - hdr_len) / sizeof(sdesc->wData[0]);
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list_for_each_entry(container, &vhub->vhub_str_desc, list) {
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if (nlangs >= max_langs)
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break;
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lang_str = ast_vhub_str_of_container(container);
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sdesc->wData[nlangs++] = cpu_to_le16(lang_str->language);
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}
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rc = hdr_len + nlangs * sizeof(sdesc->wData[0]);
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sdesc->bLength = rc;
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sdesc->bDescriptorType = USB_DT_STRING;
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return rc;
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}
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static struct usb_gadget_strings *ast_vhub_lookup_string(struct ast_vhub *vhub,
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u16 lang_id)
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{
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struct usb_gadget_strings *lang_str;
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struct usb_gadget_string_container *container;
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list_for_each_entry(container, &vhub->vhub_str_desc, list) {
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lang_str = ast_vhub_str_of_container(container);
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if (lang_str->language == lang_id)
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return lang_str;
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}
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return NULL;
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}
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static int ast_vhub_rep_string(struct ast_vhub_ep *ep,
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u8 string_id, u16 lang_id,
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u16 len)
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{
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int rc;
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u8 buf[256];
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struct ast_vhub *vhub = ep->vhub;
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struct usb_gadget_strings *lang_str;
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if (string_id == 0) {
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rc = ast_vhub_collect_languages(vhub, buf, sizeof(buf));
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} else {
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lang_str = ast_vhub_lookup_string(vhub, lang_id);
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if (!lang_str)
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return std_req_stall;
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rc = usb_gadget_get_string(lang_str, string_id, buf);
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}
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if (rc < 0 || rc >= AST_VHUB_EP0_MAX_PACKET)
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return std_req_stall;
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/* Shoot it from the EP buffer */
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memcpy(ep->buf, buf, rc);
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return ast_vhub_reply(ep, NULL, min_t(u16, rc, len));
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}
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enum std_req_rc ast_vhub_std_hub_request(struct ast_vhub_ep *ep,
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struct usb_ctrlrequest *crq)
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{
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struct ast_vhub *vhub = ep->vhub;
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u16 wValue, wIndex, wLength;
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wValue = le16_to_cpu(crq->wValue);
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wIndex = le16_to_cpu(crq->wIndex);
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wLength = le16_to_cpu(crq->wLength);
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/* First packet, grab speed */
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if (vhub->speed == USB_SPEED_UNKNOWN) {
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u32 ustat = readl(vhub->regs + AST_VHUB_USBSTS);
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if (ustat & VHUB_USBSTS_HISPEED)
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vhub->speed = USB_SPEED_HIGH;
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else
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vhub->speed = USB_SPEED_FULL;
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UDCDBG(vhub, "USB status=%08x speed=%s\n", ustat,
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vhub->speed == USB_SPEED_HIGH ? "high" : "full");
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}
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switch ((crq->bRequestType << 8) | crq->bRequest) {
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/* SET_ADDRESS */
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case DeviceOutRequest | USB_REQ_SET_ADDRESS:
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EPDBG(ep, "SET_ADDRESS: Got address %x\n", wValue);
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writel(wValue, vhub->regs + AST_VHUB_CONF);
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return std_req_complete;
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/* GET_STATUS */
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case DeviceRequest | USB_REQ_GET_STATUS:
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return ast_vhub_hub_dev_status(ep, wIndex, wValue);
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case InterfaceRequest | USB_REQ_GET_STATUS:
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return ast_vhub_simple_reply(ep, 0, 0);
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case EndpointRequest | USB_REQ_GET_STATUS:
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return ast_vhub_hub_ep_status(ep, wIndex, wValue);
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/* SET/CLEAR_FEATURE */
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case DeviceOutRequest | USB_REQ_SET_FEATURE:
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return ast_vhub_hub_dev_feature(ep, wIndex, wValue, true);
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case DeviceOutRequest | USB_REQ_CLEAR_FEATURE:
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return ast_vhub_hub_dev_feature(ep, wIndex, wValue, false);
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case EndpointOutRequest | USB_REQ_SET_FEATURE:
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return ast_vhub_hub_ep_feature(ep, wIndex, wValue, true);
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case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
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return ast_vhub_hub_ep_feature(ep, wIndex, wValue, false);
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/* GET/SET_CONFIGURATION */
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case DeviceRequest | USB_REQ_GET_CONFIGURATION:
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return ast_vhub_simple_reply(ep, 1);
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case DeviceOutRequest | USB_REQ_SET_CONFIGURATION:
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if (wValue != 1)
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return std_req_stall;
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return std_req_complete;
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/* GET_DESCRIPTOR */
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case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
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switch (wValue >> 8) {
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case USB_DT_DEVICE:
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case USB_DT_CONFIG:
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return ast_vhub_rep_desc(ep, wValue >> 8,
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wLength);
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case USB_DT_STRING:
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return ast_vhub_rep_string(ep, wValue & 0xff,
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wIndex, wLength);
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}
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return std_req_stall;
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/* GET/SET_INTERFACE */
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case DeviceRequest | USB_REQ_GET_INTERFACE:
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return ast_vhub_simple_reply(ep, 0);
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case DeviceOutRequest | USB_REQ_SET_INTERFACE:
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if (wValue != 0 || wIndex != 0)
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return std_req_stall;
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return std_req_complete;
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}
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return std_req_stall;
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}
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static void ast_vhub_update_hub_ep1(struct ast_vhub *vhub,
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unsigned int port)
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{
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/* Update HW EP1 response */
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u32 reg = readl(vhub->regs + AST_VHUB_EP1_STS_CHG);
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u32 pmask = (1 << (port + 1));
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if (vhub->ports[port].change)
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reg |= pmask;
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else
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reg &= ~pmask;
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writel(reg, vhub->regs + AST_VHUB_EP1_STS_CHG);
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}
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static void ast_vhub_change_port_stat(struct ast_vhub *vhub,
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unsigned int port,
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u16 clr_flags,
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u16 set_flags,
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bool set_c)
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{
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struct ast_vhub_port *p = &vhub->ports[port];
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u16 prev;
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/* Update port status */
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prev = p->status;
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p->status = (prev & ~clr_flags) | set_flags;
|
|
DDBG(&p->dev, "port %d status %04x -> %04x (C=%d)\n",
|
|
port + 1, prev, p->status, set_c);
|
|
|
|
/* Update change bits if needed */
|
|
if (set_c) {
|
|
u16 chg = p->status ^ prev;
|
|
|
|
/* Only these are relevant for change */
|
|
chg &= USB_PORT_STAT_C_CONNECTION |
|
|
USB_PORT_STAT_C_ENABLE |
|
|
USB_PORT_STAT_C_SUSPEND |
|
|
USB_PORT_STAT_C_OVERCURRENT |
|
|
USB_PORT_STAT_C_RESET |
|
|
USB_PORT_STAT_C_L1;
|
|
|
|
/*
|
|
* We only set USB_PORT_STAT_C_ENABLE if we are disabling
|
|
* the port as per USB spec, otherwise MacOS gets upset
|
|
*/
|
|
if (p->status & USB_PORT_STAT_ENABLE)
|
|
chg &= ~USB_PORT_STAT_C_ENABLE;
|
|
|
|
p->change = chg;
|
|
ast_vhub_update_hub_ep1(vhub, port);
|
|
}
|
|
}
|
|
|
|
static void ast_vhub_send_host_wakeup(struct ast_vhub *vhub)
|
|
{
|
|
u32 reg = readl(vhub->regs + AST_VHUB_CTRL);
|
|
UDCDBG(vhub, "Waking up host !\n");
|
|
reg |= VHUB_CTRL_MANUAL_REMOTE_WAKEUP;
|
|
writel(reg, vhub->regs + AST_VHUB_CTRL);
|
|
}
|
|
|
|
void ast_vhub_device_connect(struct ast_vhub *vhub,
|
|
unsigned int port, bool on)
|
|
{
|
|
if (on)
|
|
ast_vhub_change_port_stat(vhub, port, 0,
|
|
USB_PORT_STAT_CONNECTION, true);
|
|
else
|
|
ast_vhub_change_port_stat(vhub, port,
|
|
USB_PORT_STAT_CONNECTION |
|
|
USB_PORT_STAT_ENABLE,
|
|
0, true);
|
|
|
|
/*
|
|
* If the hub is set to wakup the host on connection events
|
|
* then send a wakeup.
|
|
*/
|
|
if (vhub->wakeup_en)
|
|
ast_vhub_send_host_wakeup(vhub);
|
|
}
|
|
|
|
static void ast_vhub_wake_work(struct work_struct *work)
|
|
{
|
|
struct ast_vhub *vhub = container_of(work,
|
|
struct ast_vhub,
|
|
wake_work);
|
|
unsigned long flags;
|
|
unsigned int i;
|
|
|
|
/*
|
|
* Wake all sleeping ports. If a port is suspended by
|
|
* the host suspend (without explicit state suspend),
|
|
* we let the normal host wake path deal with it later.
|
|
*/
|
|
spin_lock_irqsave(&vhub->lock, flags);
|
|
for (i = 0; i < vhub->max_ports; i++) {
|
|
struct ast_vhub_port *p = &vhub->ports[i];
|
|
|
|
if (!(p->status & USB_PORT_STAT_SUSPEND))
|
|
continue;
|
|
ast_vhub_change_port_stat(vhub, i,
|
|
USB_PORT_STAT_SUSPEND,
|
|
0, true);
|
|
ast_vhub_dev_resume(&p->dev);
|
|
}
|
|
ast_vhub_send_host_wakeup(vhub);
|
|
spin_unlock_irqrestore(&vhub->lock, flags);
|
|
}
|
|
|
|
void ast_vhub_hub_wake_all(struct ast_vhub *vhub)
|
|
{
|
|
/*
|
|
* A device is trying to wake the world, because this
|
|
* can recurse into the device, we break the call chain
|
|
* using a work queue
|
|
*/
|
|
schedule_work(&vhub->wake_work);
|
|
}
|
|
|
|
static void ast_vhub_port_reset(struct ast_vhub *vhub, u8 port)
|
|
{
|
|
struct ast_vhub_port *p = &vhub->ports[port];
|
|
u16 set, clr, speed;
|
|
|
|
/* First mark disabled */
|
|
ast_vhub_change_port_stat(vhub, port,
|
|
USB_PORT_STAT_ENABLE |
|
|
USB_PORT_STAT_SUSPEND,
|
|
USB_PORT_STAT_RESET,
|
|
false);
|
|
|
|
if (!p->dev.driver)
|
|
return;
|
|
|
|
/*
|
|
* This will either "start" the port or reset the
|
|
* device if already started...
|
|
*/
|
|
ast_vhub_dev_reset(&p->dev);
|
|
|
|
/* Grab the right speed */
|
|
speed = p->dev.driver->max_speed;
|
|
if (speed == USB_SPEED_UNKNOWN || speed > vhub->speed)
|
|
speed = vhub->speed;
|
|
|
|
switch (speed) {
|
|
case USB_SPEED_LOW:
|
|
set = USB_PORT_STAT_LOW_SPEED;
|
|
clr = USB_PORT_STAT_HIGH_SPEED;
|
|
break;
|
|
case USB_SPEED_FULL:
|
|
set = 0;
|
|
clr = USB_PORT_STAT_LOW_SPEED |
|
|
USB_PORT_STAT_HIGH_SPEED;
|
|
break;
|
|
case USB_SPEED_HIGH:
|
|
set = USB_PORT_STAT_HIGH_SPEED;
|
|
clr = USB_PORT_STAT_LOW_SPEED;
|
|
break;
|
|
default:
|
|
UDCDBG(vhub, "Unsupported speed %d when"
|
|
" connecting device\n",
|
|
speed);
|
|
return;
|
|
}
|
|
clr |= USB_PORT_STAT_RESET;
|
|
set |= USB_PORT_STAT_ENABLE;
|
|
|
|
/* This should ideally be delayed ... */
|
|
ast_vhub_change_port_stat(vhub, port, clr, set, true);
|
|
}
|
|
|
|
static enum std_req_rc ast_vhub_set_port_feature(struct ast_vhub_ep *ep,
|
|
u8 port, u16 feat)
|
|
{
|
|
struct ast_vhub *vhub = ep->vhub;
|
|
struct ast_vhub_port *p;
|
|
|
|
if (port == 0 || port > vhub->max_ports)
|
|
return std_req_stall;
|
|
port--;
|
|
p = &vhub->ports[port];
|
|
|
|
switch(feat) {
|
|
case USB_PORT_FEAT_SUSPEND:
|
|
if (!(p->status & USB_PORT_STAT_ENABLE))
|
|
return std_req_complete;
|
|
ast_vhub_change_port_stat(vhub, port,
|
|
0, USB_PORT_STAT_SUSPEND,
|
|
false);
|
|
ast_vhub_dev_suspend(&p->dev);
|
|
return std_req_complete;
|
|
case USB_PORT_FEAT_RESET:
|
|
EPDBG(ep, "Port reset !\n");
|
|
ast_vhub_port_reset(vhub, port);
|
|
return std_req_complete;
|
|
case USB_PORT_FEAT_POWER:
|
|
/*
|
|
* On Power-on, we mark the connected flag changed,
|
|
* if there's a connected device, some hosts will
|
|
* otherwise fail to detect it.
|
|
*/
|
|
if (p->status & USB_PORT_STAT_CONNECTION) {
|
|
p->change |= USB_PORT_STAT_C_CONNECTION;
|
|
ast_vhub_update_hub_ep1(vhub, port);
|
|
}
|
|
return std_req_complete;
|
|
case USB_PORT_FEAT_TEST:
|
|
case USB_PORT_FEAT_INDICATOR:
|
|
/* We don't do anything with these */
|
|
return std_req_complete;
|
|
}
|
|
return std_req_stall;
|
|
}
|
|
|
|
static enum std_req_rc ast_vhub_clr_port_feature(struct ast_vhub_ep *ep,
|
|
u8 port, u16 feat)
|
|
{
|
|
struct ast_vhub *vhub = ep->vhub;
|
|
struct ast_vhub_port *p;
|
|
|
|
if (port == 0 || port > vhub->max_ports)
|
|
return std_req_stall;
|
|
port--;
|
|
p = &vhub->ports[port];
|
|
|
|
switch(feat) {
|
|
case USB_PORT_FEAT_ENABLE:
|
|
ast_vhub_change_port_stat(vhub, port,
|
|
USB_PORT_STAT_ENABLE |
|
|
USB_PORT_STAT_SUSPEND, 0,
|
|
false);
|
|
ast_vhub_dev_suspend(&p->dev);
|
|
return std_req_complete;
|
|
case USB_PORT_FEAT_SUSPEND:
|
|
if (!(p->status & USB_PORT_STAT_SUSPEND))
|
|
return std_req_complete;
|
|
ast_vhub_change_port_stat(vhub, port,
|
|
USB_PORT_STAT_SUSPEND, 0,
|
|
false);
|
|
ast_vhub_dev_resume(&p->dev);
|
|
return std_req_complete;
|
|
case USB_PORT_FEAT_POWER:
|
|
/* We don't do power control */
|
|
return std_req_complete;
|
|
case USB_PORT_FEAT_INDICATOR:
|
|
/* We don't have indicators */
|
|
return std_req_complete;
|
|
case USB_PORT_FEAT_C_CONNECTION:
|
|
case USB_PORT_FEAT_C_ENABLE:
|
|
case USB_PORT_FEAT_C_SUSPEND:
|
|
case USB_PORT_FEAT_C_OVER_CURRENT:
|
|
case USB_PORT_FEAT_C_RESET:
|
|
/* Clear state-change feature */
|
|
p->change &= ~(1u << (feat - 16));
|
|
ast_vhub_update_hub_ep1(vhub, port);
|
|
return std_req_complete;
|
|
}
|
|
return std_req_stall;
|
|
}
|
|
|
|
static enum std_req_rc ast_vhub_get_port_stat(struct ast_vhub_ep *ep,
|
|
u8 port)
|
|
{
|
|
struct ast_vhub *vhub = ep->vhub;
|
|
u16 stat, chg;
|
|
|
|
if (port == 0 || port > vhub->max_ports)
|
|
return std_req_stall;
|
|
port--;
|
|
|
|
stat = vhub->ports[port].status;
|
|
chg = vhub->ports[port].change;
|
|
|
|
/* We always have power */
|
|
stat |= USB_PORT_STAT_POWER;
|
|
|
|
EPDBG(ep, " port status=%04x change=%04x\n", stat, chg);
|
|
|
|
return ast_vhub_simple_reply(ep,
|
|
stat & 0xff,
|
|
stat >> 8,
|
|
chg & 0xff,
|
|
chg >> 8);
|
|
}
|
|
|
|
enum std_req_rc ast_vhub_class_hub_request(struct ast_vhub_ep *ep,
|
|
struct usb_ctrlrequest *crq)
|
|
{
|
|
u16 wValue, wIndex, wLength;
|
|
|
|
wValue = le16_to_cpu(crq->wValue);
|
|
wIndex = le16_to_cpu(crq->wIndex);
|
|
wLength = le16_to_cpu(crq->wLength);
|
|
|
|
switch ((crq->bRequestType << 8) | crq->bRequest) {
|
|
case GetHubStatus:
|
|
EPDBG(ep, "GetHubStatus\n");
|
|
return ast_vhub_simple_reply(ep, 0, 0, 0, 0);
|
|
case GetPortStatus:
|
|
EPDBG(ep, "GetPortStatus(%d)\n", wIndex & 0xff);
|
|
return ast_vhub_get_port_stat(ep, wIndex & 0xf);
|
|
case GetHubDescriptor:
|
|
if (wValue != (USB_DT_HUB << 8))
|
|
return std_req_stall;
|
|
EPDBG(ep, "GetHubDescriptor(%d)\n", wIndex & 0xff);
|
|
return ast_vhub_rep_desc(ep, USB_DT_HUB, wLength);
|
|
case SetHubFeature:
|
|
case ClearHubFeature:
|
|
EPDBG(ep, "Get/SetHubFeature(%d)\n", wValue);
|
|
/* No feature, just complete the requests */
|
|
if (wValue == C_HUB_LOCAL_POWER ||
|
|
wValue == C_HUB_OVER_CURRENT)
|
|
return std_req_complete;
|
|
return std_req_stall;
|
|
case SetPortFeature:
|
|
EPDBG(ep, "SetPortFeature(%d,%d)\n", wIndex & 0xf, wValue);
|
|
return ast_vhub_set_port_feature(ep, wIndex & 0xf, wValue);
|
|
case ClearPortFeature:
|
|
EPDBG(ep, "ClearPortFeature(%d,%d)\n", wIndex & 0xf, wValue);
|
|
return ast_vhub_clr_port_feature(ep, wIndex & 0xf, wValue);
|
|
case ClearTTBuffer:
|
|
case ResetTT:
|
|
case StopTT:
|
|
return std_req_complete;
|
|
case GetTTState:
|
|
return ast_vhub_simple_reply(ep, 0, 0, 0, 0);
|
|
default:
|
|
EPDBG(ep, "Unknown class request\n");
|
|
}
|
|
return std_req_stall;
|
|
}
|
|
|
|
void ast_vhub_hub_suspend(struct ast_vhub *vhub)
|
|
{
|
|
unsigned int i;
|
|
|
|
UDCDBG(vhub, "USB bus suspend\n");
|
|
|
|
if (vhub->suspended)
|
|
return;
|
|
|
|
vhub->suspended = true;
|
|
|
|
/*
|
|
* Forward to unsuspended ports without changing
|
|
* their connection status.
|
|
*/
|
|
for (i = 0; i < vhub->max_ports; i++) {
|
|
struct ast_vhub_port *p = &vhub->ports[i];
|
|
|
|
if (!(p->status & USB_PORT_STAT_SUSPEND))
|
|
ast_vhub_dev_suspend(&p->dev);
|
|
}
|
|
}
|
|
|
|
void ast_vhub_hub_resume(struct ast_vhub *vhub)
|
|
{
|
|
unsigned int i;
|
|
|
|
UDCDBG(vhub, "USB bus resume\n");
|
|
|
|
if (!vhub->suspended)
|
|
return;
|
|
|
|
vhub->suspended = false;
|
|
|
|
/*
|
|
* Forward to unsuspended ports without changing
|
|
* their connection status.
|
|
*/
|
|
for (i = 0; i < vhub->max_ports; i++) {
|
|
struct ast_vhub_port *p = &vhub->ports[i];
|
|
|
|
if (!(p->status & USB_PORT_STAT_SUSPEND))
|
|
ast_vhub_dev_resume(&p->dev);
|
|
}
|
|
}
|
|
|
|
void ast_vhub_hub_reset(struct ast_vhub *vhub)
|
|
{
|
|
unsigned int i;
|
|
|
|
UDCDBG(vhub, "USB bus reset\n");
|
|
|
|
/*
|
|
* Is the speed known ? If not we don't care, we aren't
|
|
* initialized yet and ports haven't been enabled.
|
|
*/
|
|
if (vhub->speed == USB_SPEED_UNKNOWN)
|
|
return;
|
|
|
|
/* We aren't suspended anymore obviously */
|
|
vhub->suspended = false;
|
|
|
|
/* No speed set */
|
|
vhub->speed = USB_SPEED_UNKNOWN;
|
|
|
|
/* Wakeup not enabled anymore */
|
|
vhub->wakeup_en = false;
|
|
|
|
/*
|
|
* Clear all port status, disable gadgets and "suspend"
|
|
* them. They will be woken up by a port reset.
|
|
*/
|
|
for (i = 0; i < vhub->max_ports; i++) {
|
|
struct ast_vhub_port *p = &vhub->ports[i];
|
|
|
|
/* Only keep the connected flag */
|
|
p->status &= USB_PORT_STAT_CONNECTION;
|
|
p->change = 0;
|
|
|
|
/* Suspend the gadget if any */
|
|
ast_vhub_dev_suspend(&p->dev);
|
|
}
|
|
|
|
/* Cleanup HW */
|
|
writel(0, vhub->regs + AST_VHUB_CONF);
|
|
writel(0, vhub->regs + AST_VHUB_EP0_CTRL);
|
|
writel(VHUB_EP1_CTRL_RESET_TOGGLE |
|
|
VHUB_EP1_CTRL_ENABLE,
|
|
vhub->regs + AST_VHUB_EP1_CTRL);
|
|
writel(0, vhub->regs + AST_VHUB_EP1_STS_CHG);
|
|
}
|
|
|
|
static void ast_vhub_of_parse_dev_desc(struct ast_vhub *vhub,
|
|
const struct device_node *vhub_np)
|
|
{
|
|
u16 id;
|
|
u32 data;
|
|
|
|
if (!of_property_read_u32(vhub_np, "vhub-vendor-id", &data)) {
|
|
id = (u16)data;
|
|
vhub->vhub_dev_desc.idVendor = cpu_to_le16(id);
|
|
}
|
|
if (!of_property_read_u32(vhub_np, "vhub-product-id", &data)) {
|
|
id = (u16)data;
|
|
vhub->vhub_dev_desc.idProduct = cpu_to_le16(id);
|
|
}
|
|
if (!of_property_read_u32(vhub_np, "vhub-device-revision", &data)) {
|
|
id = (u16)data;
|
|
vhub->vhub_dev_desc.bcdDevice = cpu_to_le16(id);
|
|
}
|
|
}
|
|
|
|
static void ast_vhub_fixup_usb1_dev_desc(struct ast_vhub *vhub)
|
|
{
|
|
vhub->vhub_dev_desc.bcdUSB = cpu_to_le16(0x0100);
|
|
vhub->vhub_dev_desc.bDeviceProtocol = 0;
|
|
}
|
|
|
|
static struct usb_gadget_string_container*
|
|
ast_vhub_str_container_alloc(struct ast_vhub *vhub)
|
|
{
|
|
unsigned int size;
|
|
struct usb_string *str_array;
|
|
struct usb_gadget_strings *lang_str;
|
|
struct usb_gadget_string_container *container;
|
|
|
|
size = sizeof(*container);
|
|
size += sizeof(struct usb_gadget_strings);
|
|
size += sizeof(struct usb_string) * AST_VHUB_STR_INDEX_MAX;
|
|
container = devm_kzalloc(&vhub->pdev->dev, size, GFP_KERNEL);
|
|
if (!container)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
lang_str = ast_vhub_str_of_container(container);
|
|
str_array = (struct usb_string *)(lang_str + 1);
|
|
lang_str->strings = str_array;
|
|
return container;
|
|
}
|
|
|
|
static void ast_vhub_str_deep_copy(struct usb_gadget_strings *dest,
|
|
const struct usb_gadget_strings *src)
|
|
{
|
|
struct usb_string *src_array = src->strings;
|
|
struct usb_string *dest_array = dest->strings;
|
|
|
|
dest->language = src->language;
|
|
if (src_array && dest_array) {
|
|
do {
|
|
*dest_array = *src_array;
|
|
dest_array++;
|
|
src_array++;
|
|
} while (src_array->s);
|
|
}
|
|
}
|
|
|
|
static int ast_vhub_str_alloc_add(struct ast_vhub *vhub,
|
|
const struct usb_gadget_strings *src_str)
|
|
{
|
|
struct usb_gadget_strings *dest_str;
|
|
struct usb_gadget_string_container *container;
|
|
|
|
container = ast_vhub_str_container_alloc(vhub);
|
|
if (IS_ERR(container))
|
|
return PTR_ERR(container);
|
|
|
|
dest_str = ast_vhub_str_of_container(container);
|
|
ast_vhub_str_deep_copy(dest_str, src_str);
|
|
list_add_tail(&container->list, &vhub->vhub_str_desc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct {
|
|
const char *name;
|
|
u8 id;
|
|
} str_id_map[] = {
|
|
{"manufacturer", AST_VHUB_STR_MANUF},
|
|
{"product", AST_VHUB_STR_PRODUCT},
|
|
{"serial-number", AST_VHUB_STR_SERIAL},
|
|
{},
|
|
};
|
|
|
|
static int ast_vhub_of_parse_str_desc(struct ast_vhub *vhub,
|
|
const struct device_node *desc_np)
|
|
{
|
|
u32 langid;
|
|
int ret = 0;
|
|
int i, offset;
|
|
const char *str;
|
|
struct device_node *child;
|
|
struct usb_string str_array[AST_VHUB_STR_INDEX_MAX];
|
|
struct usb_gadget_strings lang_str = {
|
|
.strings = (struct usb_string *)str_array,
|
|
};
|
|
|
|
for_each_child_of_node(desc_np, child) {
|
|
if (of_property_read_u32(child, "reg", &langid))
|
|
continue; /* no language identifier specified */
|
|
|
|
if (!usb_validate_langid(langid))
|
|
continue; /* invalid language identifier */
|
|
|
|
lang_str.language = langid;
|
|
for (i = offset = 0; str_id_map[i].name; i++) {
|
|
str = of_get_property(child, str_id_map[i].name, NULL);
|
|
if (str) {
|
|
str_array[offset].s = str;
|
|
str_array[offset].id = str_id_map[i].id;
|
|
offset++;
|
|
}
|
|
}
|
|
str_array[offset].id = 0;
|
|
str_array[offset].s = NULL;
|
|
|
|
ret = ast_vhub_str_alloc_add(vhub, &lang_str);
|
|
if (ret) {
|
|
of_node_put(child);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ast_vhub_init_desc(struct ast_vhub *vhub)
|
|
{
|
|
int ret;
|
|
struct device_node *desc_np;
|
|
const struct device_node *vhub_np = vhub->pdev->dev.of_node;
|
|
|
|
/* Initialize vhub Device Descriptor. */
|
|
memcpy(&vhub->vhub_dev_desc, &ast_vhub_dev_desc,
|
|
sizeof(vhub->vhub_dev_desc));
|
|
ast_vhub_of_parse_dev_desc(vhub, vhub_np);
|
|
if (vhub->force_usb1)
|
|
ast_vhub_fixup_usb1_dev_desc(vhub);
|
|
|
|
/* Initialize vhub Configuration Descriptor. */
|
|
memcpy(&vhub->vhub_conf_desc, &ast_vhub_conf_desc,
|
|
sizeof(vhub->vhub_conf_desc));
|
|
|
|
/* Initialize vhub Hub Descriptor. */
|
|
memcpy(&vhub->vhub_hub_desc, &ast_vhub_hub_desc,
|
|
sizeof(vhub->vhub_hub_desc));
|
|
vhub->vhub_hub_desc.bNbrPorts = vhub->max_ports;
|
|
|
|
/* Initialize vhub String Descriptors. */
|
|
INIT_LIST_HEAD(&vhub->vhub_str_desc);
|
|
desc_np = of_get_child_by_name(vhub_np, "vhub-strings");
|
|
if (desc_np) {
|
|
ret = ast_vhub_of_parse_str_desc(vhub, desc_np);
|
|
of_node_put(desc_np);
|
|
}
|
|
else
|
|
ret = ast_vhub_str_alloc_add(vhub, &ast_vhub_strings);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int ast_vhub_init_hub(struct ast_vhub *vhub)
|
|
{
|
|
vhub->speed = USB_SPEED_UNKNOWN;
|
|
INIT_WORK(&vhub->wake_work, ast_vhub_wake_work);
|
|
|
|
return ast_vhub_init_desc(vhub);
|
|
}
|