1287 строки
31 KiB
C
1287 строки
31 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* f_sourcesink.c - USB peripheral source/sink configuration driver
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*
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* Copyright (C) 2003-2008 David Brownell
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* Copyright (C) 2008 by Nokia Corporation
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*/
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/* #define VERBOSE_DEBUG */
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/usb/composite.h>
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#include <linux/err.h>
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#include "g_zero.h"
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#include "u_f.h"
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/*
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* SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral
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* controller drivers.
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*
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* This just sinks bulk packets OUT to the peripheral and sources them IN
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* to the host, optionally with specific data patterns for integrity tests.
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* As such it supports basic functionality and load tests.
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*
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* In terms of control messaging, this supports all the standard requests
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* plus two that support control-OUT tests. If the optional "autoresume"
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* mode is enabled, it provides good functional coverage for the "USBCV"
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* test harness from USB-IF.
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*/
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struct f_sourcesink {
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struct usb_function function;
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struct usb_ep *in_ep;
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struct usb_ep *out_ep;
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struct usb_ep *iso_in_ep;
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struct usb_ep *iso_out_ep;
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int cur_alt;
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unsigned pattern;
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unsigned isoc_interval;
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unsigned isoc_maxpacket;
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unsigned isoc_mult;
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unsigned isoc_maxburst;
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unsigned buflen;
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unsigned bulk_qlen;
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unsigned iso_qlen;
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};
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static inline struct f_sourcesink *func_to_ss(struct usb_function *f)
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{
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return container_of(f, struct f_sourcesink, function);
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}
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/*-------------------------------------------------------------------------*/
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static struct usb_interface_descriptor source_sink_intf_alt0 = {
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.bLength = USB_DT_INTERFACE_SIZE,
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.bDescriptorType = USB_DT_INTERFACE,
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.bAlternateSetting = 0,
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.bNumEndpoints = 2,
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.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
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/* .iInterface = DYNAMIC */
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};
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static struct usb_interface_descriptor source_sink_intf_alt1 = {
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.bLength = USB_DT_INTERFACE_SIZE,
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.bDescriptorType = USB_DT_INTERFACE,
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.bAlternateSetting = 1,
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.bNumEndpoints = 4,
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.bInterfaceClass = USB_CLASS_VENDOR_SPEC,
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/* .iInterface = DYNAMIC */
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};
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/* full speed support: */
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static struct usb_endpoint_descriptor fs_source_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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};
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static struct usb_endpoint_descriptor fs_sink_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_OUT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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};
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static struct usb_endpoint_descriptor fs_iso_source_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_ISOC,
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.wMaxPacketSize = cpu_to_le16(1023),
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.bInterval = 4,
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};
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static struct usb_endpoint_descriptor fs_iso_sink_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_OUT,
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.bmAttributes = USB_ENDPOINT_XFER_ISOC,
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.wMaxPacketSize = cpu_to_le16(1023),
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.bInterval = 4,
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};
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static struct usb_descriptor_header *fs_source_sink_descs[] = {
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(struct usb_descriptor_header *) &source_sink_intf_alt0,
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(struct usb_descriptor_header *) &fs_sink_desc,
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(struct usb_descriptor_header *) &fs_source_desc,
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(struct usb_descriptor_header *) &source_sink_intf_alt1,
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#define FS_ALT_IFC_1_OFFSET 3
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(struct usb_descriptor_header *) &fs_sink_desc,
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(struct usb_descriptor_header *) &fs_source_desc,
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(struct usb_descriptor_header *) &fs_iso_sink_desc,
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(struct usb_descriptor_header *) &fs_iso_source_desc,
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NULL,
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};
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/* high speed support: */
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static struct usb_endpoint_descriptor hs_source_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = cpu_to_le16(512),
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};
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static struct usb_endpoint_descriptor hs_sink_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = cpu_to_le16(512),
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};
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static struct usb_endpoint_descriptor hs_iso_source_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bmAttributes = USB_ENDPOINT_XFER_ISOC,
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.wMaxPacketSize = cpu_to_le16(1024),
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.bInterval = 4,
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};
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static struct usb_endpoint_descriptor hs_iso_sink_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bmAttributes = USB_ENDPOINT_XFER_ISOC,
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.wMaxPacketSize = cpu_to_le16(1024),
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.bInterval = 4,
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};
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static struct usb_descriptor_header *hs_source_sink_descs[] = {
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(struct usb_descriptor_header *) &source_sink_intf_alt0,
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(struct usb_descriptor_header *) &hs_source_desc,
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(struct usb_descriptor_header *) &hs_sink_desc,
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(struct usb_descriptor_header *) &source_sink_intf_alt1,
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#define HS_ALT_IFC_1_OFFSET 3
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(struct usb_descriptor_header *) &hs_source_desc,
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(struct usb_descriptor_header *) &hs_sink_desc,
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(struct usb_descriptor_header *) &hs_iso_source_desc,
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(struct usb_descriptor_header *) &hs_iso_sink_desc,
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NULL,
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};
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/* super speed support: */
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static struct usb_endpoint_descriptor ss_source_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = cpu_to_le16(1024),
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};
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static struct usb_ss_ep_comp_descriptor ss_source_comp_desc = {
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.bLength = USB_DT_SS_EP_COMP_SIZE,
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.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
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.bMaxBurst = 0,
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.bmAttributes = 0,
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.wBytesPerInterval = 0,
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};
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static struct usb_endpoint_descriptor ss_sink_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bmAttributes = USB_ENDPOINT_XFER_BULK,
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.wMaxPacketSize = cpu_to_le16(1024),
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};
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static struct usb_ss_ep_comp_descriptor ss_sink_comp_desc = {
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.bLength = USB_DT_SS_EP_COMP_SIZE,
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.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
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.bMaxBurst = 0,
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.bmAttributes = 0,
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.wBytesPerInterval = 0,
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};
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static struct usb_endpoint_descriptor ss_iso_source_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bmAttributes = USB_ENDPOINT_XFER_ISOC,
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.wMaxPacketSize = cpu_to_le16(1024),
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.bInterval = 4,
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};
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static struct usb_ss_ep_comp_descriptor ss_iso_source_comp_desc = {
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.bLength = USB_DT_SS_EP_COMP_SIZE,
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.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
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.bMaxBurst = 0,
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.bmAttributes = 0,
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.wBytesPerInterval = cpu_to_le16(1024),
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};
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static struct usb_endpoint_descriptor ss_iso_sink_desc = {
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.bLength = USB_DT_ENDPOINT_SIZE,
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.bDescriptorType = USB_DT_ENDPOINT,
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.bmAttributes = USB_ENDPOINT_XFER_ISOC,
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.wMaxPacketSize = cpu_to_le16(1024),
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.bInterval = 4,
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};
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static struct usb_ss_ep_comp_descriptor ss_iso_sink_comp_desc = {
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.bLength = USB_DT_SS_EP_COMP_SIZE,
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.bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
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.bMaxBurst = 0,
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.bmAttributes = 0,
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.wBytesPerInterval = cpu_to_le16(1024),
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};
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static struct usb_descriptor_header *ss_source_sink_descs[] = {
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(struct usb_descriptor_header *) &source_sink_intf_alt0,
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(struct usb_descriptor_header *) &ss_source_desc,
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(struct usb_descriptor_header *) &ss_source_comp_desc,
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(struct usb_descriptor_header *) &ss_sink_desc,
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(struct usb_descriptor_header *) &ss_sink_comp_desc,
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(struct usb_descriptor_header *) &source_sink_intf_alt1,
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#define SS_ALT_IFC_1_OFFSET 5
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(struct usb_descriptor_header *) &ss_source_desc,
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(struct usb_descriptor_header *) &ss_source_comp_desc,
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(struct usb_descriptor_header *) &ss_sink_desc,
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(struct usb_descriptor_header *) &ss_sink_comp_desc,
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(struct usb_descriptor_header *) &ss_iso_source_desc,
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(struct usb_descriptor_header *) &ss_iso_source_comp_desc,
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(struct usb_descriptor_header *) &ss_iso_sink_desc,
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(struct usb_descriptor_header *) &ss_iso_sink_comp_desc,
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NULL,
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};
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/* function-specific strings: */
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static struct usb_string strings_sourcesink[] = {
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[0].s = "source and sink data",
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{ } /* end of list */
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};
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static struct usb_gadget_strings stringtab_sourcesink = {
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.language = 0x0409, /* en-us */
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.strings = strings_sourcesink,
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};
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static struct usb_gadget_strings *sourcesink_strings[] = {
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&stringtab_sourcesink,
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NULL,
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};
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/*-------------------------------------------------------------------------*/
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static inline struct usb_request *ss_alloc_ep_req(struct usb_ep *ep, int len)
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{
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return alloc_ep_req(ep, len);
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}
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static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep)
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{
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int value;
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value = usb_ep_disable(ep);
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if (value < 0)
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DBG(cdev, "disable %s --> %d\n", ep->name, value);
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}
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void disable_endpoints(struct usb_composite_dev *cdev,
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struct usb_ep *in, struct usb_ep *out,
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struct usb_ep *iso_in, struct usb_ep *iso_out)
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{
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disable_ep(cdev, in);
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disable_ep(cdev, out);
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if (iso_in)
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disable_ep(cdev, iso_in);
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if (iso_out)
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disable_ep(cdev, iso_out);
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}
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static int
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sourcesink_bind(struct usb_configuration *c, struct usb_function *f)
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{
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struct usb_composite_dev *cdev = c->cdev;
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struct f_sourcesink *ss = func_to_ss(f);
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int id;
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int ret;
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/* allocate interface ID(s) */
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id = usb_interface_id(c, f);
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if (id < 0)
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return id;
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source_sink_intf_alt0.bInterfaceNumber = id;
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source_sink_intf_alt1.bInterfaceNumber = id;
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/* allocate bulk endpoints */
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ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
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if (!ss->in_ep) {
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autoconf_fail:
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ERROR(cdev, "%s: can't autoconfigure on %s\n",
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f->name, cdev->gadget->name);
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return -ENODEV;
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}
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ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc);
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if (!ss->out_ep)
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goto autoconf_fail;
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/* sanity check the isoc module parameters */
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if (ss->isoc_interval < 1)
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ss->isoc_interval = 1;
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if (ss->isoc_interval > 16)
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ss->isoc_interval = 16;
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if (ss->isoc_mult > 2)
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ss->isoc_mult = 2;
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if (ss->isoc_maxburst > 15)
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ss->isoc_maxburst = 15;
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/* fill in the FS isoc descriptors from the module parameters */
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fs_iso_source_desc.wMaxPacketSize = ss->isoc_maxpacket > 1023 ?
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1023 : ss->isoc_maxpacket;
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fs_iso_source_desc.bInterval = ss->isoc_interval;
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fs_iso_sink_desc.wMaxPacketSize = ss->isoc_maxpacket > 1023 ?
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1023 : ss->isoc_maxpacket;
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fs_iso_sink_desc.bInterval = ss->isoc_interval;
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/* allocate iso endpoints */
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ss->iso_in_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_source_desc);
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if (!ss->iso_in_ep)
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goto no_iso;
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ss->iso_out_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_sink_desc);
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if (!ss->iso_out_ep) {
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usb_ep_autoconfig_release(ss->iso_in_ep);
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ss->iso_in_ep = NULL;
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no_iso:
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/*
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* We still want to work even if the UDC doesn't have isoc
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* endpoints, so null out the alt interface that contains
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* them and continue.
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*/
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fs_source_sink_descs[FS_ALT_IFC_1_OFFSET] = NULL;
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hs_source_sink_descs[HS_ALT_IFC_1_OFFSET] = NULL;
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ss_source_sink_descs[SS_ALT_IFC_1_OFFSET] = NULL;
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}
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if (ss->isoc_maxpacket > 1024)
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ss->isoc_maxpacket = 1024;
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/* support high speed hardware */
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hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
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hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
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/*
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* Fill in the HS isoc descriptors from the module parameters.
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* We assume that the user knows what they are doing and won't
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* give parameters that their UDC doesn't support.
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*/
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hs_iso_source_desc.wMaxPacketSize = ss->isoc_maxpacket;
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hs_iso_source_desc.wMaxPacketSize |= ss->isoc_mult << 11;
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hs_iso_source_desc.bInterval = ss->isoc_interval;
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hs_iso_source_desc.bEndpointAddress =
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fs_iso_source_desc.bEndpointAddress;
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hs_iso_sink_desc.wMaxPacketSize = ss->isoc_maxpacket;
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hs_iso_sink_desc.wMaxPacketSize |= ss->isoc_mult << 11;
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hs_iso_sink_desc.bInterval = ss->isoc_interval;
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hs_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
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/* support super speed hardware */
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ss_source_desc.bEndpointAddress =
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fs_source_desc.bEndpointAddress;
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ss_sink_desc.bEndpointAddress =
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fs_sink_desc.bEndpointAddress;
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/*
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* Fill in the SS isoc descriptors from the module parameters.
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* We assume that the user knows what they are doing and won't
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* give parameters that their UDC doesn't support.
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*/
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ss_iso_source_desc.wMaxPacketSize = ss->isoc_maxpacket;
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ss_iso_source_desc.bInterval = ss->isoc_interval;
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ss_iso_source_comp_desc.bmAttributes = ss->isoc_mult;
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ss_iso_source_comp_desc.bMaxBurst = ss->isoc_maxburst;
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ss_iso_source_comp_desc.wBytesPerInterval = ss->isoc_maxpacket *
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(ss->isoc_mult + 1) * (ss->isoc_maxburst + 1);
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ss_iso_source_desc.bEndpointAddress =
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fs_iso_source_desc.bEndpointAddress;
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ss_iso_sink_desc.wMaxPacketSize = ss->isoc_maxpacket;
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ss_iso_sink_desc.bInterval = ss->isoc_interval;
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ss_iso_sink_comp_desc.bmAttributes = ss->isoc_mult;
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ss_iso_sink_comp_desc.bMaxBurst = ss->isoc_maxburst;
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ss_iso_sink_comp_desc.wBytesPerInterval = ss->isoc_maxpacket *
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(ss->isoc_mult + 1) * (ss->isoc_maxburst + 1);
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ss_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
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ret = usb_assign_descriptors(f, fs_source_sink_descs,
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hs_source_sink_descs, ss_source_sink_descs, NULL);
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if (ret)
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return ret;
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DBG(cdev, "%s speed %s: IN/%s, OUT/%s, ISO-IN/%s, ISO-OUT/%s\n",
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(gadget_is_superspeed(c->cdev->gadget) ? "super" :
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(gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
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f->name, ss->in_ep->name, ss->out_ep->name,
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ss->iso_in_ep ? ss->iso_in_ep->name : "<none>",
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ss->iso_out_ep ? ss->iso_out_ep->name : "<none>");
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return 0;
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}
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static void
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sourcesink_free_func(struct usb_function *f)
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{
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struct f_ss_opts *opts;
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opts = container_of(f->fi, struct f_ss_opts, func_inst);
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mutex_lock(&opts->lock);
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opts->refcnt--;
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mutex_unlock(&opts->lock);
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usb_free_all_descriptors(f);
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kfree(func_to_ss(f));
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}
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/* optionally require specific source/sink data patterns */
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static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
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{
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unsigned i;
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u8 *buf = req->buf;
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struct usb_composite_dev *cdev = ss->function.config->cdev;
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int max_packet_size = le16_to_cpu(ss->out_ep->desc->wMaxPacketSize);
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if (ss->pattern == 2)
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return 0;
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|
|
for (i = 0; i < req->actual; i++, buf++) {
|
|
switch (ss->pattern) {
|
|
|
|
/* all-zeroes has no synchronization issues */
|
|
case 0:
|
|
if (*buf == 0)
|
|
continue;
|
|
break;
|
|
|
|
/* "mod63" stays in sync with short-terminated transfers,
|
|
* OR otherwise when host and gadget agree on how large
|
|
* each usb transfer request should be. Resync is done
|
|
* with set_interface or set_config. (We *WANT* it to
|
|
* get quickly out of sync if controllers or their drivers
|
|
* stutter for any reason, including buffer duplication...)
|
|
*/
|
|
case 1:
|
|
if (*buf == (u8)((i % max_packet_size) % 63))
|
|
continue;
|
|
break;
|
|
}
|
|
ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf);
|
|
usb_ep_set_halt(ss->out_ep);
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void reinit_write_data(struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
unsigned i;
|
|
u8 *buf = req->buf;
|
|
int max_packet_size = le16_to_cpu(ep->desc->wMaxPacketSize);
|
|
struct f_sourcesink *ss = ep->driver_data;
|
|
|
|
switch (ss->pattern) {
|
|
case 0:
|
|
memset(req->buf, 0, req->length);
|
|
break;
|
|
case 1:
|
|
for (i = 0; i < req->length; i++)
|
|
*buf++ = (u8) ((i % max_packet_size) % 63);
|
|
break;
|
|
case 2:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void source_sink_complete(struct usb_ep *ep, struct usb_request *req)
|
|
{
|
|
struct usb_composite_dev *cdev;
|
|
struct f_sourcesink *ss = ep->driver_data;
|
|
int status = req->status;
|
|
|
|
/* driver_data will be null if ep has been disabled */
|
|
if (!ss)
|
|
return;
|
|
|
|
cdev = ss->function.config->cdev;
|
|
|
|
switch (status) {
|
|
|
|
case 0: /* normal completion? */
|
|
if (ep == ss->out_ep) {
|
|
check_read_data(ss, req);
|
|
if (ss->pattern != 2)
|
|
memset(req->buf, 0x55, req->length);
|
|
}
|
|
break;
|
|
|
|
/* this endpoint is normally active while we're configured */
|
|
case -ECONNABORTED: /* hardware forced ep reset */
|
|
case -ECONNRESET: /* request dequeued */
|
|
case -ESHUTDOWN: /* disconnect from host */
|
|
VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status,
|
|
req->actual, req->length);
|
|
if (ep == ss->out_ep)
|
|
check_read_data(ss, req);
|
|
free_ep_req(ep, req);
|
|
return;
|
|
|
|
case -EOVERFLOW: /* buffer overrun on read means that
|
|
* we didn't provide a big enough
|
|
* buffer.
|
|
*/
|
|
default:
|
|
#if 1
|
|
DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name,
|
|
status, req->actual, req->length);
|
|
#endif
|
|
case -EREMOTEIO: /* short read */
|
|
break;
|
|
}
|
|
|
|
status = usb_ep_queue(ep, req, GFP_ATOMIC);
|
|
if (status) {
|
|
ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n",
|
|
ep->name, req->length, status);
|
|
usb_ep_set_halt(ep);
|
|
/* FIXME recover later ... somehow */
|
|
}
|
|
}
|
|
|
|
static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in,
|
|
bool is_iso, int speed)
|
|
{
|
|
struct usb_ep *ep;
|
|
struct usb_request *req;
|
|
int i, size, qlen, status = 0;
|
|
|
|
if (is_iso) {
|
|
switch (speed) {
|
|
case USB_SPEED_SUPER:
|
|
size = ss->isoc_maxpacket *
|
|
(ss->isoc_mult + 1) *
|
|
(ss->isoc_maxburst + 1);
|
|
break;
|
|
case USB_SPEED_HIGH:
|
|
size = ss->isoc_maxpacket * (ss->isoc_mult + 1);
|
|
break;
|
|
default:
|
|
size = ss->isoc_maxpacket > 1023 ?
|
|
1023 : ss->isoc_maxpacket;
|
|
break;
|
|
}
|
|
ep = is_in ? ss->iso_in_ep : ss->iso_out_ep;
|
|
qlen = ss->iso_qlen;
|
|
} else {
|
|
ep = is_in ? ss->in_ep : ss->out_ep;
|
|
qlen = ss->bulk_qlen;
|
|
size = ss->buflen;
|
|
}
|
|
|
|
for (i = 0; i < qlen; i++) {
|
|
req = ss_alloc_ep_req(ep, size);
|
|
if (!req)
|
|
return -ENOMEM;
|
|
|
|
req->complete = source_sink_complete;
|
|
if (is_in)
|
|
reinit_write_data(ep, req);
|
|
else if (ss->pattern != 2)
|
|
memset(req->buf, 0x55, req->length);
|
|
|
|
status = usb_ep_queue(ep, req, GFP_ATOMIC);
|
|
if (status) {
|
|
struct usb_composite_dev *cdev;
|
|
|
|
cdev = ss->function.config->cdev;
|
|
ERROR(cdev, "start %s%s %s --> %d\n",
|
|
is_iso ? "ISO-" : "", is_in ? "IN" : "OUT",
|
|
ep->name, status);
|
|
free_ep_req(ep, req);
|
|
return status;
|
|
}
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static void disable_source_sink(struct f_sourcesink *ss)
|
|
{
|
|
struct usb_composite_dev *cdev;
|
|
|
|
cdev = ss->function.config->cdev;
|
|
disable_endpoints(cdev, ss->in_ep, ss->out_ep, ss->iso_in_ep,
|
|
ss->iso_out_ep);
|
|
VDBG(cdev, "%s disabled\n", ss->function.name);
|
|
}
|
|
|
|
static int
|
|
enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss,
|
|
int alt)
|
|
{
|
|
int result = 0;
|
|
int speed = cdev->gadget->speed;
|
|
struct usb_ep *ep;
|
|
|
|
/* one bulk endpoint writes (sources) zeroes IN (to the host) */
|
|
ep = ss->in_ep;
|
|
result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
|
|
if (result)
|
|
return result;
|
|
result = usb_ep_enable(ep);
|
|
if (result < 0)
|
|
return result;
|
|
ep->driver_data = ss;
|
|
|
|
result = source_sink_start_ep(ss, true, false, speed);
|
|
if (result < 0) {
|
|
fail:
|
|
ep = ss->in_ep;
|
|
usb_ep_disable(ep);
|
|
return result;
|
|
}
|
|
|
|
/* one bulk endpoint reads (sinks) anything OUT (from the host) */
|
|
ep = ss->out_ep;
|
|
result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
|
|
if (result)
|
|
goto fail;
|
|
result = usb_ep_enable(ep);
|
|
if (result < 0)
|
|
goto fail;
|
|
ep->driver_data = ss;
|
|
|
|
result = source_sink_start_ep(ss, false, false, speed);
|
|
if (result < 0) {
|
|
fail2:
|
|
ep = ss->out_ep;
|
|
usb_ep_disable(ep);
|
|
goto fail;
|
|
}
|
|
|
|
if (alt == 0)
|
|
goto out;
|
|
|
|
/* one iso endpoint writes (sources) zeroes IN (to the host) */
|
|
ep = ss->iso_in_ep;
|
|
if (ep) {
|
|
result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
|
|
if (result)
|
|
goto fail2;
|
|
result = usb_ep_enable(ep);
|
|
if (result < 0)
|
|
goto fail2;
|
|
ep->driver_data = ss;
|
|
|
|
result = source_sink_start_ep(ss, true, true, speed);
|
|
if (result < 0) {
|
|
fail3:
|
|
ep = ss->iso_in_ep;
|
|
if (ep)
|
|
usb_ep_disable(ep);
|
|
goto fail2;
|
|
}
|
|
}
|
|
|
|
/* one iso endpoint reads (sinks) anything OUT (from the host) */
|
|
ep = ss->iso_out_ep;
|
|
if (ep) {
|
|
result = config_ep_by_speed(cdev->gadget, &(ss->function), ep);
|
|
if (result)
|
|
goto fail3;
|
|
result = usb_ep_enable(ep);
|
|
if (result < 0)
|
|
goto fail3;
|
|
ep->driver_data = ss;
|
|
|
|
result = source_sink_start_ep(ss, false, true, speed);
|
|
if (result < 0) {
|
|
usb_ep_disable(ep);
|
|
goto fail3;
|
|
}
|
|
}
|
|
out:
|
|
ss->cur_alt = alt;
|
|
|
|
DBG(cdev, "%s enabled, alt intf %d\n", ss->function.name, alt);
|
|
return result;
|
|
}
|
|
|
|
static int sourcesink_set_alt(struct usb_function *f,
|
|
unsigned intf, unsigned alt)
|
|
{
|
|
struct f_sourcesink *ss = func_to_ss(f);
|
|
struct usb_composite_dev *cdev = f->config->cdev;
|
|
|
|
disable_source_sink(ss);
|
|
return enable_source_sink(cdev, ss, alt);
|
|
}
|
|
|
|
static int sourcesink_get_alt(struct usb_function *f, unsigned intf)
|
|
{
|
|
struct f_sourcesink *ss = func_to_ss(f);
|
|
|
|
return ss->cur_alt;
|
|
}
|
|
|
|
static void sourcesink_disable(struct usb_function *f)
|
|
{
|
|
struct f_sourcesink *ss = func_to_ss(f);
|
|
|
|
disable_source_sink(ss);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int sourcesink_setup(struct usb_function *f,
|
|
const struct usb_ctrlrequest *ctrl)
|
|
{
|
|
struct usb_configuration *c = f->config;
|
|
struct usb_request *req = c->cdev->req;
|
|
int value = -EOPNOTSUPP;
|
|
u16 w_index = le16_to_cpu(ctrl->wIndex);
|
|
u16 w_value = le16_to_cpu(ctrl->wValue);
|
|
u16 w_length = le16_to_cpu(ctrl->wLength);
|
|
|
|
req->length = USB_COMP_EP0_BUFSIZ;
|
|
|
|
/* composite driver infrastructure handles everything except
|
|
* the two control test requests.
|
|
*/
|
|
switch (ctrl->bRequest) {
|
|
|
|
/*
|
|
* These are the same vendor-specific requests supported by
|
|
* Intel's USB 2.0 compliance test devices. We exceed that
|
|
* device spec by allowing multiple-packet requests.
|
|
*
|
|
* NOTE: the Control-OUT data stays in req->buf ... better
|
|
* would be copying it into a scratch buffer, so that other
|
|
* requests may safely intervene.
|
|
*/
|
|
case 0x5b: /* control WRITE test -- fill the buffer */
|
|
if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR))
|
|
goto unknown;
|
|
if (w_value || w_index)
|
|
break;
|
|
/* just read that many bytes into the buffer */
|
|
if (w_length > req->length)
|
|
break;
|
|
value = w_length;
|
|
break;
|
|
case 0x5c: /* control READ test -- return the buffer */
|
|
if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR))
|
|
goto unknown;
|
|
if (w_value || w_index)
|
|
break;
|
|
/* expect those bytes are still in the buffer; send back */
|
|
if (w_length > req->length)
|
|
break;
|
|
value = w_length;
|
|
break;
|
|
|
|
default:
|
|
unknown:
|
|
VDBG(c->cdev,
|
|
"unknown control req%02x.%02x v%04x i%04x l%d\n",
|
|
ctrl->bRequestType, ctrl->bRequest,
|
|
w_value, w_index, w_length);
|
|
}
|
|
|
|
/* respond with data transfer or status phase? */
|
|
if (value >= 0) {
|
|
VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n",
|
|
ctrl->bRequestType, ctrl->bRequest,
|
|
w_value, w_index, w_length);
|
|
req->zero = 0;
|
|
req->length = value;
|
|
value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC);
|
|
if (value < 0)
|
|
ERROR(c->cdev, "source/sink response, err %d\n",
|
|
value);
|
|
}
|
|
|
|
/* device either stalls (value < 0) or reports success */
|
|
return value;
|
|
}
|
|
|
|
static struct usb_function *source_sink_alloc_func(
|
|
struct usb_function_instance *fi)
|
|
{
|
|
struct f_sourcesink *ss;
|
|
struct f_ss_opts *ss_opts;
|
|
|
|
ss = kzalloc(sizeof(*ss), GFP_KERNEL);
|
|
if (!ss)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
ss_opts = container_of(fi, struct f_ss_opts, func_inst);
|
|
|
|
mutex_lock(&ss_opts->lock);
|
|
ss_opts->refcnt++;
|
|
mutex_unlock(&ss_opts->lock);
|
|
|
|
ss->pattern = ss_opts->pattern;
|
|
ss->isoc_interval = ss_opts->isoc_interval;
|
|
ss->isoc_maxpacket = ss_opts->isoc_maxpacket;
|
|
ss->isoc_mult = ss_opts->isoc_mult;
|
|
ss->isoc_maxburst = ss_opts->isoc_maxburst;
|
|
ss->buflen = ss_opts->bulk_buflen;
|
|
ss->bulk_qlen = ss_opts->bulk_qlen;
|
|
ss->iso_qlen = ss_opts->iso_qlen;
|
|
|
|
ss->function.name = "source/sink";
|
|
ss->function.bind = sourcesink_bind;
|
|
ss->function.set_alt = sourcesink_set_alt;
|
|
ss->function.get_alt = sourcesink_get_alt;
|
|
ss->function.disable = sourcesink_disable;
|
|
ss->function.setup = sourcesink_setup;
|
|
ss->function.strings = sourcesink_strings;
|
|
|
|
ss->function.free_func = sourcesink_free_func;
|
|
|
|
return &ss->function;
|
|
}
|
|
|
|
static inline struct f_ss_opts *to_f_ss_opts(struct config_item *item)
|
|
{
|
|
return container_of(to_config_group(item), struct f_ss_opts,
|
|
func_inst.group);
|
|
}
|
|
|
|
static void ss_attr_release(struct config_item *item)
|
|
{
|
|
struct f_ss_opts *ss_opts = to_f_ss_opts(item);
|
|
|
|
usb_put_function_instance(&ss_opts->func_inst);
|
|
}
|
|
|
|
static struct configfs_item_operations ss_item_ops = {
|
|
.release = ss_attr_release,
|
|
};
|
|
|
|
static ssize_t f_ss_opts_pattern_show(struct config_item *item, char *page)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int result;
|
|
|
|
mutex_lock(&opts->lock);
|
|
result = sprintf(page, "%u\n", opts->pattern);
|
|
mutex_unlock(&opts->lock);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t f_ss_opts_pattern_store(struct config_item *item,
|
|
const char *page, size_t len)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int ret;
|
|
u8 num;
|
|
|
|
mutex_lock(&opts->lock);
|
|
if (opts->refcnt) {
|
|
ret = -EBUSY;
|
|
goto end;
|
|
}
|
|
|
|
ret = kstrtou8(page, 0, &num);
|
|
if (ret)
|
|
goto end;
|
|
|
|
if (num != 0 && num != 1 && num != 2) {
|
|
ret = -EINVAL;
|
|
goto end;
|
|
}
|
|
|
|
opts->pattern = num;
|
|
ret = len;
|
|
end:
|
|
mutex_unlock(&opts->lock);
|
|
return ret;
|
|
}
|
|
|
|
CONFIGFS_ATTR(f_ss_opts_, pattern);
|
|
|
|
static ssize_t f_ss_opts_isoc_interval_show(struct config_item *item, char *page)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int result;
|
|
|
|
mutex_lock(&opts->lock);
|
|
result = sprintf(page, "%u\n", opts->isoc_interval);
|
|
mutex_unlock(&opts->lock);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t f_ss_opts_isoc_interval_store(struct config_item *item,
|
|
const char *page, size_t len)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int ret;
|
|
u8 num;
|
|
|
|
mutex_lock(&opts->lock);
|
|
if (opts->refcnt) {
|
|
ret = -EBUSY;
|
|
goto end;
|
|
}
|
|
|
|
ret = kstrtou8(page, 0, &num);
|
|
if (ret)
|
|
goto end;
|
|
|
|
if (num > 16) {
|
|
ret = -EINVAL;
|
|
goto end;
|
|
}
|
|
|
|
opts->isoc_interval = num;
|
|
ret = len;
|
|
end:
|
|
mutex_unlock(&opts->lock);
|
|
return ret;
|
|
}
|
|
|
|
CONFIGFS_ATTR(f_ss_opts_, isoc_interval);
|
|
|
|
static ssize_t f_ss_opts_isoc_maxpacket_show(struct config_item *item, char *page)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int result;
|
|
|
|
mutex_lock(&opts->lock);
|
|
result = sprintf(page, "%u\n", opts->isoc_maxpacket);
|
|
mutex_unlock(&opts->lock);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t f_ss_opts_isoc_maxpacket_store(struct config_item *item,
|
|
const char *page, size_t len)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int ret;
|
|
u16 num;
|
|
|
|
mutex_lock(&opts->lock);
|
|
if (opts->refcnt) {
|
|
ret = -EBUSY;
|
|
goto end;
|
|
}
|
|
|
|
ret = kstrtou16(page, 0, &num);
|
|
if (ret)
|
|
goto end;
|
|
|
|
if (num > 1024) {
|
|
ret = -EINVAL;
|
|
goto end;
|
|
}
|
|
|
|
opts->isoc_maxpacket = num;
|
|
ret = len;
|
|
end:
|
|
mutex_unlock(&opts->lock);
|
|
return ret;
|
|
}
|
|
|
|
CONFIGFS_ATTR(f_ss_opts_, isoc_maxpacket);
|
|
|
|
static ssize_t f_ss_opts_isoc_mult_show(struct config_item *item, char *page)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int result;
|
|
|
|
mutex_lock(&opts->lock);
|
|
result = sprintf(page, "%u\n", opts->isoc_mult);
|
|
mutex_unlock(&opts->lock);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t f_ss_opts_isoc_mult_store(struct config_item *item,
|
|
const char *page, size_t len)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int ret;
|
|
u8 num;
|
|
|
|
mutex_lock(&opts->lock);
|
|
if (opts->refcnt) {
|
|
ret = -EBUSY;
|
|
goto end;
|
|
}
|
|
|
|
ret = kstrtou8(page, 0, &num);
|
|
if (ret)
|
|
goto end;
|
|
|
|
if (num > 2) {
|
|
ret = -EINVAL;
|
|
goto end;
|
|
}
|
|
|
|
opts->isoc_mult = num;
|
|
ret = len;
|
|
end:
|
|
mutex_unlock(&opts->lock);
|
|
return ret;
|
|
}
|
|
|
|
CONFIGFS_ATTR(f_ss_opts_, isoc_mult);
|
|
|
|
static ssize_t f_ss_opts_isoc_maxburst_show(struct config_item *item, char *page)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int result;
|
|
|
|
mutex_lock(&opts->lock);
|
|
result = sprintf(page, "%u\n", opts->isoc_maxburst);
|
|
mutex_unlock(&opts->lock);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t f_ss_opts_isoc_maxburst_store(struct config_item *item,
|
|
const char *page, size_t len)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int ret;
|
|
u8 num;
|
|
|
|
mutex_lock(&opts->lock);
|
|
if (opts->refcnt) {
|
|
ret = -EBUSY;
|
|
goto end;
|
|
}
|
|
|
|
ret = kstrtou8(page, 0, &num);
|
|
if (ret)
|
|
goto end;
|
|
|
|
if (num > 15) {
|
|
ret = -EINVAL;
|
|
goto end;
|
|
}
|
|
|
|
opts->isoc_maxburst = num;
|
|
ret = len;
|
|
end:
|
|
mutex_unlock(&opts->lock);
|
|
return ret;
|
|
}
|
|
|
|
CONFIGFS_ATTR(f_ss_opts_, isoc_maxburst);
|
|
|
|
static ssize_t f_ss_opts_bulk_buflen_show(struct config_item *item, char *page)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int result;
|
|
|
|
mutex_lock(&opts->lock);
|
|
result = sprintf(page, "%u\n", opts->bulk_buflen);
|
|
mutex_unlock(&opts->lock);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t f_ss_opts_bulk_buflen_store(struct config_item *item,
|
|
const char *page, size_t len)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int ret;
|
|
u32 num;
|
|
|
|
mutex_lock(&opts->lock);
|
|
if (opts->refcnt) {
|
|
ret = -EBUSY;
|
|
goto end;
|
|
}
|
|
|
|
ret = kstrtou32(page, 0, &num);
|
|
if (ret)
|
|
goto end;
|
|
|
|
opts->bulk_buflen = num;
|
|
ret = len;
|
|
end:
|
|
mutex_unlock(&opts->lock);
|
|
return ret;
|
|
}
|
|
|
|
CONFIGFS_ATTR(f_ss_opts_, bulk_buflen);
|
|
|
|
static ssize_t f_ss_opts_bulk_qlen_show(struct config_item *item, char *page)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int result;
|
|
|
|
mutex_lock(&opts->lock);
|
|
result = sprintf(page, "%u\n", opts->bulk_qlen);
|
|
mutex_unlock(&opts->lock);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t f_ss_opts_bulk_qlen_store(struct config_item *item,
|
|
const char *page, size_t len)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int ret;
|
|
u32 num;
|
|
|
|
mutex_lock(&opts->lock);
|
|
if (opts->refcnt) {
|
|
ret = -EBUSY;
|
|
goto end;
|
|
}
|
|
|
|
ret = kstrtou32(page, 0, &num);
|
|
if (ret)
|
|
goto end;
|
|
|
|
opts->bulk_qlen = num;
|
|
ret = len;
|
|
end:
|
|
mutex_unlock(&opts->lock);
|
|
return ret;
|
|
}
|
|
|
|
CONFIGFS_ATTR(f_ss_opts_, bulk_qlen);
|
|
|
|
static ssize_t f_ss_opts_iso_qlen_show(struct config_item *item, char *page)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int result;
|
|
|
|
mutex_lock(&opts->lock);
|
|
result = sprintf(page, "%u\n", opts->iso_qlen);
|
|
mutex_unlock(&opts->lock);
|
|
|
|
return result;
|
|
}
|
|
|
|
static ssize_t f_ss_opts_iso_qlen_store(struct config_item *item,
|
|
const char *page, size_t len)
|
|
{
|
|
struct f_ss_opts *opts = to_f_ss_opts(item);
|
|
int ret;
|
|
u32 num;
|
|
|
|
mutex_lock(&opts->lock);
|
|
if (opts->refcnt) {
|
|
ret = -EBUSY;
|
|
goto end;
|
|
}
|
|
|
|
ret = kstrtou32(page, 0, &num);
|
|
if (ret)
|
|
goto end;
|
|
|
|
opts->iso_qlen = num;
|
|
ret = len;
|
|
end:
|
|
mutex_unlock(&opts->lock);
|
|
return ret;
|
|
}
|
|
|
|
CONFIGFS_ATTR(f_ss_opts_, iso_qlen);
|
|
|
|
static struct configfs_attribute *ss_attrs[] = {
|
|
&f_ss_opts_attr_pattern,
|
|
&f_ss_opts_attr_isoc_interval,
|
|
&f_ss_opts_attr_isoc_maxpacket,
|
|
&f_ss_opts_attr_isoc_mult,
|
|
&f_ss_opts_attr_isoc_maxburst,
|
|
&f_ss_opts_attr_bulk_buflen,
|
|
&f_ss_opts_attr_bulk_qlen,
|
|
&f_ss_opts_attr_iso_qlen,
|
|
NULL,
|
|
};
|
|
|
|
static const struct config_item_type ss_func_type = {
|
|
.ct_item_ops = &ss_item_ops,
|
|
.ct_attrs = ss_attrs,
|
|
.ct_owner = THIS_MODULE,
|
|
};
|
|
|
|
static void source_sink_free_instance(struct usb_function_instance *fi)
|
|
{
|
|
struct f_ss_opts *ss_opts;
|
|
|
|
ss_opts = container_of(fi, struct f_ss_opts, func_inst);
|
|
kfree(ss_opts);
|
|
}
|
|
|
|
static struct usb_function_instance *source_sink_alloc_inst(void)
|
|
{
|
|
struct f_ss_opts *ss_opts;
|
|
|
|
ss_opts = kzalloc(sizeof(*ss_opts), GFP_KERNEL);
|
|
if (!ss_opts)
|
|
return ERR_PTR(-ENOMEM);
|
|
mutex_init(&ss_opts->lock);
|
|
ss_opts->func_inst.free_func_inst = source_sink_free_instance;
|
|
ss_opts->isoc_interval = GZERO_ISOC_INTERVAL;
|
|
ss_opts->isoc_maxpacket = GZERO_ISOC_MAXPACKET;
|
|
ss_opts->bulk_buflen = GZERO_BULK_BUFLEN;
|
|
ss_opts->bulk_qlen = GZERO_SS_BULK_QLEN;
|
|
ss_opts->iso_qlen = GZERO_SS_ISO_QLEN;
|
|
|
|
config_group_init_type_name(&ss_opts->func_inst.group, "",
|
|
&ss_func_type);
|
|
|
|
return &ss_opts->func_inst;
|
|
}
|
|
DECLARE_USB_FUNCTION(SourceSink, source_sink_alloc_inst,
|
|
source_sink_alloc_func);
|
|
|
|
static int __init sslb_modinit(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = usb_function_register(&SourceSinkusb_func);
|
|
if (ret)
|
|
return ret;
|
|
ret = lb_modinit();
|
|
if (ret)
|
|
usb_function_unregister(&SourceSinkusb_func);
|
|
return ret;
|
|
}
|
|
static void __exit sslb_modexit(void)
|
|
{
|
|
usb_function_unregister(&SourceSinkusb_func);
|
|
lb_modexit();
|
|
}
|
|
module_init(sslb_modinit);
|
|
module_exit(sslb_modexit);
|
|
|
|
MODULE_LICENSE("GPL");
|