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1287 lines
31 KiB
1287 lines
31 KiB
// 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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|
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/* #define VERBOSE_DEBUG */ |
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|
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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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|
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#include "g_zero.h" |
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#include "u_f.h" |
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|
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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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|
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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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|
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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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|
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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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/*-------------------------------------------------------------------------*/ |
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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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|
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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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|
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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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|
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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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|
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/* full speed support: */ |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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/* high speed support: */ |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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/* super speed support: */ |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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/* function-specific strings: */ |
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|
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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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/*-------------------------------------------------------------------------*/ |
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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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|
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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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|
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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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|
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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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|
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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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|
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if (ss->isoc_maxpacket > 1024) |
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ss->isoc_maxpacket = 1024; |
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|
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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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/* |
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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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|
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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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/* |
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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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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; |
|
|
|
for (i = 0; i < req->actual; i++, buf++) { |
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switch (ss->pattern) { |
|
|
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/* 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 |
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* stutter for any reason, including buffer duplication...) |
|
*/ |
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case 1: |
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if (*buf == (u8)((i % max_packet_size) % 63)) |
|
continue; |
|
break; |
|
} |
|
ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf); |
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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); |
|
break; |
|
#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");
|
|
|