--- /dev/null
+/*
+ * f_sourcesink.c - USB peripheral source/sink configuration driver
+ *
+ * Copyright (C) 2003-2008 David Brownell
+ * Copyright (C) 2008 by Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+/* #define VERBOSE_DEBUG */
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/usb/composite.h>
+#include <linux/err.h>
+
+#include "g_zero.h"
+#include "gadget_chips.h"
+#include "u_f.h"
+
+/*
+ * SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral
+ * controller drivers.
+ *
+ * This just sinks bulk packets OUT to the peripheral and sources them IN
+ * to the host, optionally with specific data patterns for integrity tests.
+ * As such it supports basic functionality and load tests.
+ *
+ * In terms of control messaging, this supports all the standard requests
+ * plus two that support control-OUT tests. If the optional "autoresume"
+ * mode is enabled, it provides good functional coverage for the "USBCV"
+ * test harness from USB-IF.
+ *
+ * Note that because this doesn't queue more than one request at a time,
+ * some other function must be used to test queueing logic. The network
+ * link (g_ether) is the best overall option for that, since its TX and RX
+ * queues are relatively independent, will receive a range of packet sizes,
+ * and can often be made to run out completely. Those issues are important
+ * when stress testing peripheral controller drivers.
+ *
+ *
+ * This is currently packaged as a configuration driver, which can't be
+ * combined with other functions to make composite devices. However, it
+ * can be combined with other independent configurations.
+ */
+struct f_sourcesink {
+ struct usb_function function;
+
+ struct usb_ep *in_ep;
+ struct usb_ep *out_ep;
+ struct usb_ep *iso_in_ep;
+ struct usb_ep *iso_out_ep;
+ int cur_alt;
+};
+
+static inline struct f_sourcesink *func_to_ss(struct usb_function *f)
+{
+ return container_of(f, struct f_sourcesink, function);
+}
+
+static unsigned pattern;
+static unsigned isoc_interval;
+static unsigned isoc_maxpacket;
+static unsigned isoc_mult;
+static unsigned isoc_maxburst;
+static unsigned buflen;
+
+/*-------------------------------------------------------------------------*/
+
+static struct usb_interface_descriptor source_sink_intf_alt0 = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 2,
+ .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
+ /* .iInterface = DYNAMIC */
+};
+
+static struct usb_interface_descriptor source_sink_intf_alt1 = {
+ .bLength = USB_DT_INTERFACE_SIZE,
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bAlternateSetting = 1,
+ .bNumEndpoints = 4,
+ .bInterfaceClass = USB_CLASS_VENDOR_SPEC,
+ /* .iInterface = DYNAMIC */
+};
+
+/* full speed support: */
+
+static struct usb_endpoint_descriptor fs_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor fs_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor fs_iso_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .wMaxPacketSize = cpu_to_le16(1023),
+ .bInterval = 4,
+};
+
+static struct usb_endpoint_descriptor fs_iso_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .wMaxPacketSize = cpu_to_le16(1023),
+ .bInterval = 4,
+};
+
+static struct usb_descriptor_header *fs_source_sink_descs[] = {
+ (struct usb_descriptor_header *) &source_sink_intf_alt0,
+ (struct usb_descriptor_header *) &fs_sink_desc,
+ (struct usb_descriptor_header *) &fs_source_desc,
+ (struct usb_descriptor_header *) &source_sink_intf_alt1,
+#define FS_ALT_IFC_1_OFFSET 3
+ (struct usb_descriptor_header *) &fs_sink_desc,
+ (struct usb_descriptor_header *) &fs_source_desc,
+ (struct usb_descriptor_header *) &fs_iso_sink_desc,
+ (struct usb_descriptor_header *) &fs_iso_source_desc,
+ NULL,
+};
+
+/* high speed support: */
+
+static struct usb_endpoint_descriptor hs_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor hs_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor hs_iso_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .wMaxPacketSize = cpu_to_le16(1024),
+ .bInterval = 4,
+};
+
+static struct usb_endpoint_descriptor hs_iso_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .wMaxPacketSize = cpu_to_le16(1024),
+ .bInterval = 4,
+};
+
+static struct usb_descriptor_header *hs_source_sink_descs[] = {
+ (struct usb_descriptor_header *) &source_sink_intf_alt0,
+ (struct usb_descriptor_header *) &hs_source_desc,
+ (struct usb_descriptor_header *) &hs_sink_desc,
+ (struct usb_descriptor_header *) &source_sink_intf_alt1,
+#define HS_ALT_IFC_1_OFFSET 3
+ (struct usb_descriptor_header *) &hs_source_desc,
+ (struct usb_descriptor_header *) &hs_sink_desc,
+ (struct usb_descriptor_header *) &hs_iso_source_desc,
+ (struct usb_descriptor_header *) &hs_iso_sink_desc,
+ NULL,
+};
+
+/* super speed support: */
+
+static struct usb_endpoint_descriptor ss_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_ss_ep_comp_descriptor ss_source_comp_desc = {
+ .bLength = USB_DT_SS_EP_COMP_SIZE,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ .bMaxBurst = 0,
+ .bmAttributes = 0,
+ .wBytesPerInterval = 0,
+};
+
+static struct usb_endpoint_descriptor ss_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_BULK,
+ .wMaxPacketSize = cpu_to_le16(1024),
+};
+
+static struct usb_ss_ep_comp_descriptor ss_sink_comp_desc = {
+ .bLength = USB_DT_SS_EP_COMP_SIZE,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ .bMaxBurst = 0,
+ .bmAttributes = 0,
+ .wBytesPerInterval = 0,
+};
+
+static struct usb_endpoint_descriptor ss_iso_source_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .wMaxPacketSize = cpu_to_le16(1024),
+ .bInterval = 4,
+};
+
+static struct usb_ss_ep_comp_descriptor ss_iso_source_comp_desc = {
+ .bLength = USB_DT_SS_EP_COMP_SIZE,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ .bMaxBurst = 0,
+ .bmAttributes = 0,
+ .wBytesPerInterval = cpu_to_le16(1024),
+};
+
+static struct usb_endpoint_descriptor ss_iso_sink_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_ISOC,
+ .wMaxPacketSize = cpu_to_le16(1024),
+ .bInterval = 4,
+};
+
+static struct usb_ss_ep_comp_descriptor ss_iso_sink_comp_desc = {
+ .bLength = USB_DT_SS_EP_COMP_SIZE,
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+
+ .bMaxBurst = 0,
+ .bmAttributes = 0,
+ .wBytesPerInterval = cpu_to_le16(1024),
+};
+
+static struct usb_descriptor_header *ss_source_sink_descs[] = {
+ (struct usb_descriptor_header *) &source_sink_intf_alt0,
+ (struct usb_descriptor_header *) &ss_source_desc,
+ (struct usb_descriptor_header *) &ss_source_comp_desc,
+ (struct usb_descriptor_header *) &ss_sink_desc,
+ (struct usb_descriptor_header *) &ss_sink_comp_desc,
+ (struct usb_descriptor_header *) &source_sink_intf_alt1,
+#define SS_ALT_IFC_1_OFFSET 5
+ (struct usb_descriptor_header *) &ss_source_desc,
+ (struct usb_descriptor_header *) &ss_source_comp_desc,
+ (struct usb_descriptor_header *) &ss_sink_desc,
+ (struct usb_descriptor_header *) &ss_sink_comp_desc,
+ (struct usb_descriptor_header *) &ss_iso_source_desc,
+ (struct usb_descriptor_header *) &ss_iso_source_comp_desc,
+ (struct usb_descriptor_header *) &ss_iso_sink_desc,
+ (struct usb_descriptor_header *) &ss_iso_sink_comp_desc,
+ NULL,
+};
+
+/* function-specific strings: */
+
+static struct usb_string strings_sourcesink[] = {
+ [0].s = "source and sink data",
+ { } /* end of list */
+};
+
+static struct usb_gadget_strings stringtab_sourcesink = {
+ .language = 0x0409, /* en-us */
+ .strings = strings_sourcesink,
+};
+
+static struct usb_gadget_strings *sourcesink_strings[] = {
+ &stringtab_sourcesink,
+ NULL,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static inline struct usb_request *ss_alloc_ep_req(struct usb_ep *ep, int len)
+{
+ return alloc_ep_req(ep, len, buflen);
+}
+
+void free_ep_req(struct usb_ep *ep, struct usb_request *req)
+{
+ kfree(req->buf);
+ usb_ep_free_request(ep, req);
+}
+
+static void disable_ep(struct usb_composite_dev *cdev, struct usb_ep *ep)
+{
+ int value;
+
+ if (ep->driver_data) {
+ value = usb_ep_disable(ep);
+ if (value < 0)
+ DBG(cdev, "disable %s --> %d\n",
+ ep->name, value);
+ ep->driver_data = NULL;
+ }
+}
+
+void disable_endpoints(struct usb_composite_dev *cdev,
+ struct usb_ep *in, struct usb_ep *out,
+ struct usb_ep *iso_in, struct usb_ep *iso_out)
+{
+ disable_ep(cdev, in);
+ disable_ep(cdev, out);
+ if (iso_in)
+ disable_ep(cdev, iso_in);
+ if (iso_out)
+ disable_ep(cdev, iso_out);
+}
+
+static int
+sourcesink_bind(struct usb_configuration *c, struct usb_function *f)
+{
+ struct usb_composite_dev *cdev = c->cdev;
+ struct f_sourcesink *ss = func_to_ss(f);
+ int id;
+ int ret;
+
+ /* allocate interface ID(s) */
+ id = usb_interface_id(c, f);
+ if (id < 0)
+ return id;
+ source_sink_intf_alt0.bInterfaceNumber = id;
+ source_sink_intf_alt1.bInterfaceNumber = id;
+
+ /* allocate bulk endpoints */
+ ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc);
+ if (!ss->in_ep) {
+autoconf_fail:
+ ERROR(cdev, "%s: can't autoconfigure on %s\n",
+ f->name, cdev->gadget->name);
+ return -ENODEV;
+ }
+ ss->in_ep->driver_data = cdev; /* claim */
+
+ ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc);
+ if (!ss->out_ep)
+ goto autoconf_fail;
+ ss->out_ep->driver_data = cdev; /* claim */
+
+ /* sanity check the isoc module parameters */
+ if (isoc_interval < 1)
+ isoc_interval = 1;
+ if (isoc_interval > 16)
+ isoc_interval = 16;
+ if (isoc_mult > 2)
+ isoc_mult = 2;
+ if (isoc_maxburst > 15)
+ isoc_maxburst = 15;
+
+ /* fill in the FS isoc descriptors from the module parameters */
+ fs_iso_source_desc.wMaxPacketSize = isoc_maxpacket > 1023 ?
+ 1023 : isoc_maxpacket;
+ fs_iso_source_desc.bInterval = isoc_interval;
+ fs_iso_sink_desc.wMaxPacketSize = isoc_maxpacket > 1023 ?
+ 1023 : isoc_maxpacket;
+ fs_iso_sink_desc.bInterval = isoc_interval;
+
+ /* allocate iso endpoints */
+ ss->iso_in_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_source_desc);
+ if (!ss->iso_in_ep)
+ goto no_iso;
+ ss->iso_in_ep->driver_data = cdev; /* claim */
+
+ ss->iso_out_ep = usb_ep_autoconfig(cdev->gadget, &fs_iso_sink_desc);
+ if (ss->iso_out_ep) {
+ ss->iso_out_ep->driver_data = cdev; /* claim */
+ } else {
+ ss->iso_in_ep->driver_data = NULL;
+ ss->iso_in_ep = NULL;
+no_iso:
+ /*
+ * We still want to work even if the UDC doesn't have isoc
+ * endpoints, so null out the alt interface that contains
+ * them and continue.
+ */
+ fs_source_sink_descs[FS_ALT_IFC_1_OFFSET] = NULL;
+ hs_source_sink_descs[HS_ALT_IFC_1_OFFSET] = NULL;
+ ss_source_sink_descs[SS_ALT_IFC_1_OFFSET] = NULL;
+ }
+
+ if (isoc_maxpacket > 1024)
+ isoc_maxpacket = 1024;
+
+ /* support high speed hardware */
+ hs_source_desc.bEndpointAddress = fs_source_desc.bEndpointAddress;
+ hs_sink_desc.bEndpointAddress = fs_sink_desc.bEndpointAddress;
+
+ /*
+ * Fill in the HS isoc descriptors from the module parameters.
+ * We assume that the user knows what they are doing and won't
+ * give parameters that their UDC doesn't support.
+ */
+ hs_iso_source_desc.wMaxPacketSize = isoc_maxpacket;
+ hs_iso_source_desc.wMaxPacketSize |= isoc_mult << 11;
+ hs_iso_source_desc.bInterval = isoc_interval;
+ hs_iso_source_desc.bEndpointAddress =
+ fs_iso_source_desc.bEndpointAddress;
+
+ hs_iso_sink_desc.wMaxPacketSize = isoc_maxpacket;
+ hs_iso_sink_desc.wMaxPacketSize |= isoc_mult << 11;
+ hs_iso_sink_desc.bInterval = isoc_interval;
+ hs_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
+
+ /* support super speed hardware */
+ ss_source_desc.bEndpointAddress =
+ fs_source_desc.bEndpointAddress;
+ ss_sink_desc.bEndpointAddress =
+ fs_sink_desc.bEndpointAddress;
+
+ /*
+ * Fill in the SS isoc descriptors from the module parameters.
+ * We assume that the user knows what they are doing and won't
+ * give parameters that their UDC doesn't support.
+ */
+ ss_iso_source_desc.wMaxPacketSize = isoc_maxpacket;
+ ss_iso_source_desc.bInterval = isoc_interval;
+ ss_iso_source_comp_desc.bmAttributes = isoc_mult;
+ ss_iso_source_comp_desc.bMaxBurst = isoc_maxburst;
+ ss_iso_source_comp_desc.wBytesPerInterval =
+ isoc_maxpacket * (isoc_mult + 1) * (isoc_maxburst + 1);
+ ss_iso_source_desc.bEndpointAddress =
+ fs_iso_source_desc.bEndpointAddress;
+
+ ss_iso_sink_desc.wMaxPacketSize = isoc_maxpacket;
+ ss_iso_sink_desc.bInterval = isoc_interval;
+ ss_iso_sink_comp_desc.bmAttributes = isoc_mult;
+ ss_iso_sink_comp_desc.bMaxBurst = isoc_maxburst;
+ ss_iso_sink_comp_desc.wBytesPerInterval =
+ isoc_maxpacket * (isoc_mult + 1) * (isoc_maxburst + 1);
+ ss_iso_sink_desc.bEndpointAddress = fs_iso_sink_desc.bEndpointAddress;
+
+ ret = usb_assign_descriptors(f, fs_source_sink_descs,
+ hs_source_sink_descs, ss_source_sink_descs);
+ if (ret)
+ return ret;
+
+ DBG(cdev, "%s speed %s: IN/%s, OUT/%s, ISO-IN/%s, ISO-OUT/%s\n",
+ (gadget_is_superspeed(c->cdev->gadget) ? "super" :
+ (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")),
+ f->name, ss->in_ep->name, ss->out_ep->name,
+ ss->iso_in_ep ? ss->iso_in_ep->name : "<none>",
+ ss->iso_out_ep ? ss->iso_out_ep->name : "<none>");
+ return 0;
+}
+
+static void
+sourcesink_free_func(struct usb_function *f)
+{
+ struct f_ss_opts *opts;
+
+ opts = container_of(f->fi, struct f_ss_opts, func_inst);
+
+ mutex_lock(&opts->lock);
+ opts->refcnt--;
+ mutex_unlock(&opts->lock);
+
+ usb_free_all_descriptors(f);
+ kfree(func_to_ss(f));
+}
+
+/* optionally require specific source/sink data patterns */
+static int check_read_data(struct f_sourcesink *ss, struct usb_request *req)
+{
+ unsigned i;
+ u8 *buf = req->buf;
+ struct usb_composite_dev *cdev = ss->function.config->cdev;
+
+ if (pattern == 2)
+ return 0;
+
+ for (i = 0; i < req->actual; i++, buf++) {
+ switch (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 % 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;
+
+ switch (pattern) {
+ case 0:
+ memset(req->buf, 0, req->length);
+ break;
+ case 1:
+ for (i = 0; i < req->length; i++)
+ *buf++ = (u8) (i % 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 (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, status;
+
+ for (i = 0; i < 8; i++) {
+ if (is_iso) {
+ switch (speed) {
+ case USB_SPEED_SUPER:
+ size = isoc_maxpacket * (isoc_mult + 1) *
+ (isoc_maxburst + 1);
+ break;
+ case USB_SPEED_HIGH:
+ size = isoc_maxpacket * (isoc_mult + 1);
+ break;
+ default:
+ size = isoc_maxpacket > 1023 ?
+ 1023 : isoc_maxpacket;
+ break;
+ }
+ ep = is_in ? ss->iso_in_ep : ss->iso_out_ep;
+ req = ss_alloc_ep_req(ep, size);
+ } else {
+ ep = is_in ? ss->in_ep : ss->out_ep;
+ req = ss_alloc_ep_req(ep, 0);
+ }
+
+ if (!req)
+ return -ENOMEM;
+
+ req->complete = source_sink_complete;
+ if (is_in)
+ reinit_write_data(ep, req);
+ else if (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);
+ }
+
+ if (!is_iso)
+ break;
+ }
+
+ 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);
+ ep->driver_data = NULL;
+ 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);
+ ep->driver_data = NULL;
+ 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);
+ ep->driver_data = NULL;
+ }
+ 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);
+ ep->driver_data = NULL;
+ 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;
+
+ if (ss->in_ep->driver_data)
+ 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 NULL;
+
+ ss_opts = container_of(fi, struct f_ss_opts, func_inst);
+
+ mutex_lock(&ss_opts->lock);
+ ss_opts->refcnt++;
+ mutex_unlock(&ss_opts->lock);
+
+ pattern = ss_opts->pattern;
+ isoc_interval = ss_opts->isoc_interval;
+ isoc_maxpacket = ss_opts->isoc_maxpacket;
+ isoc_mult = ss_opts->isoc_mult;
+ isoc_maxburst = ss_opts->isoc_maxburst;
+ buflen = ss_opts->bulk_buflen;
+
+ 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);
+}
+
+CONFIGFS_ATTR_STRUCT(f_ss_opts);
+CONFIGFS_ATTR_OPS(f_ss_opts);
+
+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,
+ .show_attribute = f_ss_opts_attr_show,
+ .store_attribute = f_ss_opts_attr_store,
+};
+
+static ssize_t f_ss_opts_pattern_show(struct f_ss_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%u", opts->pattern);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t f_ss_opts_pattern_store(struct f_ss_opts *opts,
+ const char *page, size_t len)
+{
+ 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;
+}
+
+static struct f_ss_opts_attribute f_ss_opts_pattern =
+ __CONFIGFS_ATTR(pattern, S_IRUGO | S_IWUSR,
+ f_ss_opts_pattern_show,
+ f_ss_opts_pattern_store);
+
+static ssize_t f_ss_opts_isoc_interval_show(struct f_ss_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%u", opts->isoc_interval);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t f_ss_opts_isoc_interval_store(struct f_ss_opts *opts,
+ const char *page, size_t len)
+{
+ 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;
+}
+
+static struct f_ss_opts_attribute f_ss_opts_isoc_interval =
+ __CONFIGFS_ATTR(isoc_interval, S_IRUGO | S_IWUSR,
+ f_ss_opts_isoc_interval_show,
+ f_ss_opts_isoc_interval_store);
+
+static ssize_t f_ss_opts_isoc_maxpacket_show(struct f_ss_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%u", opts->isoc_maxpacket);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t f_ss_opts_isoc_maxpacket_store(struct f_ss_opts *opts,
+ const char *page, size_t len)
+{
+ 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;
+}
+
+static struct f_ss_opts_attribute f_ss_opts_isoc_maxpacket =
+ __CONFIGFS_ATTR(isoc_maxpacket, S_IRUGO | S_IWUSR,
+ f_ss_opts_isoc_maxpacket_show,
+ f_ss_opts_isoc_maxpacket_store);
+
+static ssize_t f_ss_opts_isoc_mult_show(struct f_ss_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%u", opts->isoc_mult);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t f_ss_opts_isoc_mult_store(struct f_ss_opts *opts,
+ const char *page, size_t len)
+{
+ 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;
+}
+
+static struct f_ss_opts_attribute f_ss_opts_isoc_mult =
+ __CONFIGFS_ATTR(isoc_mult, S_IRUGO | S_IWUSR,
+ f_ss_opts_isoc_mult_show,
+ f_ss_opts_isoc_mult_store);
+
+static ssize_t f_ss_opts_isoc_maxburst_show(struct f_ss_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%u", opts->isoc_maxburst);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t f_ss_opts_isoc_maxburst_store(struct f_ss_opts *opts,
+ const char *page, size_t len)
+{
+ 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;
+}
+
+static struct f_ss_opts_attribute f_ss_opts_isoc_maxburst =
+ __CONFIGFS_ATTR(isoc_maxburst, S_IRUGO | S_IWUSR,
+ f_ss_opts_isoc_maxburst_show,
+ f_ss_opts_isoc_maxburst_store);
+
+static ssize_t f_ss_opts_bulk_buflen_show(struct f_ss_opts *opts, char *page)
+{
+ int result;
+
+ mutex_lock(&opts->lock);
+ result = sprintf(page, "%u", opts->bulk_buflen);
+ mutex_unlock(&opts->lock);
+
+ return result;
+}
+
+static ssize_t f_ss_opts_bulk_buflen_store(struct f_ss_opts *opts,
+ const char *page, size_t len)
+{
+ 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;
+}
+
+static struct f_ss_opts_attribute f_ss_opts_bulk_buflen =
+ __CONFIGFS_ATTR(buflen, S_IRUGO | S_IWUSR,
+ f_ss_opts_bulk_buflen_show,
+ f_ss_opts_bulk_buflen_store);
+
+static struct configfs_attribute *ss_attrs[] = {
+ &f_ss_opts_pattern.attr,
+ &f_ss_opts_isoc_interval.attr,
+ &f_ss_opts_isoc_maxpacket.attr,
+ &f_ss_opts_isoc_mult.attr,
+ &f_ss_opts_isoc_maxburst.attr,
+ &f_ss_opts_bulk_buflen.attr,
+ NULL,
+};
+
+static 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;
+
+ 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");
Code Review / kvmfornfv.git / blobdiff