Initial

1 files changed, 617 insertions, 0 deletions

diff --git a/src/os/netbsd_usb.c b/src/os/netbsd_usb.c
new file mode 100644
index 0000000..74833f6
--- /dev/null
+++ b/src/os/netbsd_usb.c
@@ -0,0 +1,617 @@
+/*
+ * Copyright © 2011 Martin Pieuchot <mpi@openbsd.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <config.h>
+
+#include <sys/time.h>
+#include <sys/types.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <dev/usb/usb.h>
+
+#include "libusbi.h"
+
+struct device_priv {
+	char devnode[16];
+	int fd;
+
+	usb_config_descriptor_t *cdesc;		/* active config descriptor */
+};
+
+struct handle_priv {
+	int endpoints[USB_MAX_ENDPOINTS];
+};
+
+/*
+ * Backend functions
+ */
+static int netbsd_get_device_list(struct libusb_context *,
+    struct discovered_devs **);
+static int netbsd_open(struct libusb_device_handle *);
+static void netbsd_close(struct libusb_device_handle *);
+
+static int netbsd_get_active_config_descriptor(struct libusb_device *,
+    void *, size_t);
+static int netbsd_get_config_descriptor(struct libusb_device *, uint8_t,
+    void *, size_t);
+
+static int netbsd_get_configuration(struct libusb_device_handle *, uint8_t *);
+static int netbsd_set_configuration(struct libusb_device_handle *, int);
+
+static int netbsd_claim_interface(struct libusb_device_handle *, uint8_t);
+static int netbsd_release_interface(struct libusb_device_handle *, uint8_t);
+
+static int netbsd_set_interface_altsetting(struct libusb_device_handle *,
+    uint8_t, uint8_t);
+static int netbsd_clear_halt(struct libusb_device_handle *, unsigned char);
+static void netbsd_destroy_device(struct libusb_device *);
+
+static int netbsd_submit_transfer(struct usbi_transfer *);
+static int netbsd_cancel_transfer(struct usbi_transfer *);
+static int netbsd_handle_transfer_completion(struct usbi_transfer *);
+
+/*
+ * Private functions
+ */
+static int _errno_to_libusb(int);
+static int _cache_active_config_descriptor(struct libusb_device *, int);
+static int _sync_control_transfer(struct usbi_transfer *);
+static int _sync_gen_transfer(struct usbi_transfer *);
+static int _access_endpoint(struct libusb_transfer *);
+
+const struct usbi_os_backend usbi_backend = {
+	.name = "Synchronous NetBSD backend",
+	.caps = 0,
+	.get_device_list = netbsd_get_device_list,
+	.open = netbsd_open,
+	.close = netbsd_close,
+
+	.get_active_config_descriptor = netbsd_get_active_config_descriptor,
+	.get_config_descriptor = netbsd_get_config_descriptor,
+
+	.get_configuration = netbsd_get_configuration,
+	.set_configuration = netbsd_set_configuration,
+
+	.claim_interface = netbsd_claim_interface,
+	.release_interface = netbsd_release_interface,
+
+	.set_interface_altsetting = netbsd_set_interface_altsetting,
+	.clear_halt = netbsd_clear_halt,
+
+	.destroy_device = netbsd_destroy_device,
+
+	.submit_transfer = netbsd_submit_transfer,
+	.cancel_transfer = netbsd_cancel_transfer,
+
+	.handle_transfer_completion = netbsd_handle_transfer_completion,
+
+	.device_priv_size = sizeof(struct device_priv),
+	.device_handle_priv_size = sizeof(struct handle_priv),
+};
+
+int
+netbsd_get_device_list(struct libusb_context * ctx,
+	struct discovered_devs **discdevs)
+{
+	struct libusb_device *dev;
+	struct device_priv *dpriv;
+	struct usb_device_info di;
+	usb_device_descriptor_t ddesc;
+	unsigned long session_id;
+	char devnode[16];
+	int fd, err, i;
+
+	usbi_dbg(ctx, " ");
+
+	/* Only ugen(4) is supported */
+	for (i = 0; i < USB_MAX_DEVICES; i++) {
+		/* Control endpoint is always .00 */
+		snprintf(devnode, sizeof(devnode), "/dev/ugen%d.00", i);
+
+		if ((fd = open(devnode, O_RDONLY)) < 0) {
+			if (errno != ENOENT && errno != ENXIO)
+				usbi_err(ctx, "could not open %s", devnode);
+			continue;
+		}
+
+		if (ioctl(fd, USB_GET_DEVICEINFO, &di) < 0)
+			continue;
+
+		session_id = (di.udi_bus << 8 | di.udi_addr);
+		dev = usbi_get_device_by_session_id(ctx, session_id);
+
+		if (dev == NULL) {
+			dev = usbi_alloc_device(ctx, session_id);
+			if (dev == NULL)
+				return (LIBUSB_ERROR_NO_MEM);
+
+			dev->bus_number = di.udi_bus;
+			dev->device_address = di.udi_addr;
+			dev->speed = di.udi_speed;
+
+			dpriv = usbi_get_device_priv(dev);
+			strlcpy(dpriv->devnode, devnode, sizeof(devnode));
+			dpriv->fd = -1;
+
+			if (ioctl(fd, USB_GET_DEVICE_DESC, &ddesc) < 0) {
+				err = errno;
+				goto error;
+			}
+
+			static_assert(sizeof(dev->device_descriptor) == sizeof(ddesc),
+				      "mismatch between libusb and OS device descriptor sizes");
+			memcpy(&dev->device_descriptor, &ddesc, LIBUSB_DT_DEVICE_SIZE);
+			usbi_localize_device_descriptor(&dev->device_descriptor);
+
+			if (_cache_active_config_descriptor(dev, fd)) {
+				err = errno;
+				goto error;
+			}
+
+			if ((err = usbi_sanitize_device(dev)))
+				goto error;
+		}
+		close(fd);
+
+		if (discovered_devs_append(*discdevs, dev) == NULL)
+			return (LIBUSB_ERROR_NO_MEM);
+
+		libusb_unref_device(dev);
+	}
+
+	return (LIBUSB_SUCCESS);
+
+error:
+	close(fd);
+	libusb_unref_device(dev);
+	return _errno_to_libusb(err);
+}
+
+int
+netbsd_open(struct libusb_device_handle *handle)
+{
+	struct device_priv *dpriv = usbi_get_device_priv(handle->dev);
+	struct handle_priv *hpriv = usbi_get_device_handle_priv(handle);
+	int i;
+
+	dpriv->fd = open(dpriv->devnode, O_RDWR);
+	if (dpriv->fd < 0) {
+		dpriv->fd = open(dpriv->devnode, O_RDONLY);
+		if (dpriv->fd < 0)
+			return _errno_to_libusb(errno);
+	}
+
+	for (i = 0; i < USB_MAX_ENDPOINTS; i++)
+		hpriv->endpoints[i] = -1;
+
+	usbi_dbg(HANDLE_CTX(handle), "open %s: fd %d", dpriv->devnode, dpriv->fd);
+
+	return (LIBUSB_SUCCESS);
+}
+
+void
+netbsd_close(struct libusb_device_handle *handle)
+{
+	struct device_priv *dpriv = usbi_get_device_priv(handle->dev);
+
+	usbi_dbg(HANDLE_CTX(handle), "close: fd %d", dpriv->fd);
+
+	close(dpriv->fd);
+	dpriv->fd = -1;
+}
+
+int
+netbsd_get_active_config_descriptor(struct libusb_device *dev,
+    void *buf, size_t len)
+{
+	struct device_priv *dpriv = usbi_get_device_priv(dev);
+
+	len = MIN(len, (size_t)UGETW(dpriv->cdesc->wTotalLength));
+
+	usbi_dbg(DEVICE_CTX(dev), "len %zu", len);
+
+	memcpy(buf, dpriv->cdesc, len);
+
+	return (int)len;
+}
+
+int
+netbsd_get_config_descriptor(struct libusb_device *dev, uint8_t idx,
+    void *buf, size_t len)
+{
+	struct device_priv *dpriv = usbi_get_device_priv(dev);
+	struct usb_full_desc ufd;
+	int fd, err;
+
+	usbi_dbg(DEVICE_CTX(dev), "index %u, len %zu", idx, len);
+
+	/* A config descriptor may be requested before opening the device */
+	if (dpriv->fd >= 0) {
+		fd = dpriv->fd;
+	} else {
+		fd = open(dpriv->devnode, O_RDONLY);
+		if (fd < 0)
+			return _errno_to_libusb(errno);
+	}
+
+	ufd.ufd_config_index = idx;
+	ufd.ufd_size = len;
+	ufd.ufd_data = buf;
+
+	if ((ioctl(fd, USB_GET_FULL_DESC, &ufd)) < 0) {
+		err = errno;
+		if (dpriv->fd < 0)
+			close(fd);
+		return _errno_to_libusb(err);
+	}
+
+	if (dpriv->fd < 0)
+		close(fd);
+
+	return (int)len;
+}
+
+int
+netbsd_get_configuration(struct libusb_device_handle *handle, uint8_t *config)
+{
+	struct device_priv *dpriv = usbi_get_device_priv(handle->dev);
+	int tmp;
+
+	usbi_dbg(HANDLE_CTX(handle), " ");
+
+	if (ioctl(dpriv->fd, USB_GET_CONFIG, &tmp) < 0)
+		return _errno_to_libusb(errno);
+
+	usbi_dbg(HANDLE_CTX(handle), "configuration %d", tmp);
+	*config = (uint8_t)tmp;
+
+	return (LIBUSB_SUCCESS);
+}
+
+int
+netbsd_set_configuration(struct libusb_device_handle *handle, int config)
+{
+	struct device_priv *dpriv = usbi_get_device_priv(handle->dev);
+
+	usbi_dbg(HANDLE_CTX(handle), "configuration %d", config);
+
+	if (ioctl(dpriv->fd, USB_SET_CONFIG, &config) < 0)
+		return _errno_to_libusb(errno);
+
+	return _cache_active_config_descriptor(handle->dev, dpriv->fd);
+}
+
+int
+netbsd_claim_interface(struct libusb_device_handle *handle, uint8_t iface)
+{
+	struct handle_priv *hpriv = usbi_get_device_handle_priv(handle);
+	int i;
+
+	UNUSED(iface);
+
+	for (i = 0; i < USB_MAX_ENDPOINTS; i++)
+		hpriv->endpoints[i] = -1;
+
+	return (LIBUSB_SUCCESS);
+}
+
+int
+netbsd_release_interface(struct libusb_device_handle *handle, uint8_t iface)
+{
+	struct handle_priv *hpriv = usbi_get_device_handle_priv(handle);
+	int i;
+
+	UNUSED(iface);
+
+	for (i = 0; i < USB_MAX_ENDPOINTS; i++)
+		if (hpriv->endpoints[i] >= 0)
+			close(hpriv->endpoints[i]);
+
+	return (LIBUSB_SUCCESS);
+}
+
+int
+netbsd_set_interface_altsetting(struct libusb_device_handle *handle, uint8_t iface,
+    uint8_t altsetting)
+{
+	struct device_priv *dpriv = usbi_get_device_priv(handle->dev);
+	struct usb_alt_interface intf;
+
+	usbi_dbg(HANDLE_CTX(handle), "iface %u, setting %u", iface, altsetting);
+
+	memset(&intf, 0, sizeof(intf));
+
+	intf.uai_interface_index = iface;
+	intf.uai_alt_no = altsetting;
+
+	if (ioctl(dpriv->fd, USB_SET_ALTINTERFACE, &intf) < 0)
+		return _errno_to_libusb(errno);
+
+	return (LIBUSB_SUCCESS);
+}
+
+int
+netbsd_clear_halt(struct libusb_device_handle *handle, unsigned char endpoint)
+{
+	struct device_priv *dpriv = usbi_get_device_priv(handle->dev);
+	struct usb_ctl_request req;
+
+	usbi_dbg(HANDLE_CTX(handle), " ");
+
+	req.ucr_request.bmRequestType = UT_WRITE_ENDPOINT;
+	req.ucr_request.bRequest = UR_CLEAR_FEATURE;
+	USETW(req.ucr_request.wValue, UF_ENDPOINT_HALT);
+	USETW(req.ucr_request.wIndex, endpoint);
+	USETW(req.ucr_request.wLength, 0);
+
+	if (ioctl(dpriv->fd, USB_DO_REQUEST, &req) < 0)
+		return _errno_to_libusb(errno);
+
+	return (LIBUSB_SUCCESS);
+}
+
+void
+netbsd_destroy_device(struct libusb_device *dev)
+{
+	struct device_priv *dpriv = usbi_get_device_priv(dev);
+
+	usbi_dbg(DEVICE_CTX(dev), " ");
+
+	free(dpriv->cdesc);
+}
+
+int
+netbsd_submit_transfer(struct usbi_transfer *itransfer)
+{
+	struct libusb_transfer *transfer;
+	int err = 0;
+
+	usbi_dbg(ITRANSFER_CTX(itransfer), " ");
+
+	transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
+
+	switch (transfer->type) {
+	case LIBUSB_TRANSFER_TYPE_CONTROL:
+		err = _sync_control_transfer(itransfer);
+		break;
+	case LIBUSB_TRANSFER_TYPE_ISOCHRONOUS:
+		if (IS_XFEROUT(transfer)) {
+			/* Isochronous write is not supported */
+			err = LIBUSB_ERROR_NOT_SUPPORTED;
+			break;
+		}
+		err = _sync_gen_transfer(itransfer);
+		break;
+	case LIBUSB_TRANSFER_TYPE_BULK:
+	case LIBUSB_TRANSFER_TYPE_INTERRUPT:
+		if (IS_XFEROUT(transfer) &&
+		    transfer->flags & LIBUSB_TRANSFER_ADD_ZERO_PACKET) {
+			err = LIBUSB_ERROR_NOT_SUPPORTED;
+			break;
+		}
+		err = _sync_gen_transfer(itransfer);
+		break;
+	case LIBUSB_TRANSFER_TYPE_BULK_STREAM:
+		err = LIBUSB_ERROR_NOT_SUPPORTED;
+		break;
+	}
+
+	if (err)
+		return (err);
+
+	usbi_signal_transfer_completion(itransfer);
+
+	return (LIBUSB_SUCCESS);
+}
+
+int
+netbsd_cancel_transfer(struct usbi_transfer *itransfer)
+{
+	UNUSED(itransfer);
+
+	usbi_dbg(ITRANSFER_CTX(itransfer), " ");
+
+	return (LIBUSB_ERROR_NOT_SUPPORTED);
+}
+
+int
+netbsd_handle_transfer_completion(struct usbi_transfer *itransfer)
+{
+	return usbi_handle_transfer_completion(itransfer, LIBUSB_TRANSFER_COMPLETED);
+}
+
+int
+_errno_to_libusb(int err)
+{
+	switch (err) {
+	case EIO:
+		return (LIBUSB_ERROR_IO);
+	case EACCES:
+		return (LIBUSB_ERROR_ACCESS);
+	case ENOENT:
+		return (LIBUSB_ERROR_NO_DEVICE);
+	case ENOMEM:
+		return (LIBUSB_ERROR_NO_MEM);
+	case EWOULDBLOCK:
+	case ETIMEDOUT:
+		return (LIBUSB_ERROR_TIMEOUT);
+	}
+
+	usbi_dbg(NULL, "error: %s", strerror(err));
+
+	return (LIBUSB_ERROR_OTHER);
+}
+
+int
+_cache_active_config_descriptor(struct libusb_device *dev, int fd)
+{
+	struct device_priv *dpriv = usbi_get_device_priv(dev);
+	struct usb_config_desc ucd;
+	struct usb_full_desc ufd;
+	void *buf;
+	int len;
+
+	usbi_dbg(DEVICE_CTX(dev), "fd %d", fd);
+
+	ucd.ucd_config_index = USB_CURRENT_CONFIG_INDEX;
+
+	if ((ioctl(fd, USB_GET_CONFIG_DESC, &ucd)) < 0)
+		return _errno_to_libusb(errno);
+
+	usbi_dbg(DEVICE_CTX(dev), "active bLength %d", ucd.ucd_desc.bLength);
+
+	len = UGETW(ucd.ucd_desc.wTotalLength);
+	buf = malloc((size_t)len);
+	if (buf == NULL)
+		return (LIBUSB_ERROR_NO_MEM);
+
+	ufd.ufd_config_index = ucd.ucd_config_index;
+	ufd.ufd_size = len;
+	ufd.ufd_data = buf;
+
+	usbi_dbg(DEVICE_CTX(dev), "index %d, len %d", ufd.ufd_config_index, len);
+
+	if ((ioctl(fd, USB_GET_FULL_DESC, &ufd)) < 0) {
+		free(buf);
+		return _errno_to_libusb(errno);
+	}
+
+	if (dpriv->cdesc)
+		free(dpriv->cdesc);
+	dpriv->cdesc = buf;
+
+	return (0);
+}
+
+int
+_sync_control_transfer(struct usbi_transfer *itransfer)
+{
+	struct libusb_transfer *transfer;
+	struct libusb_control_setup *setup;
+	struct device_priv *dpriv;
+	struct usb_ctl_request req;
+
+	transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
+	dpriv = usbi_get_device_priv(transfer->dev_handle->dev);
+	setup = (struct libusb_control_setup *)transfer->buffer;
+
+	usbi_dbg(ITRANSFER_CTX(itransfer), "type %d request %d value %d index %d length %d timeout %d",
+	    setup->bmRequestType, setup->bRequest,
+	    libusb_le16_to_cpu(setup->wValue),
+	    libusb_le16_to_cpu(setup->wIndex),
+	    libusb_le16_to_cpu(setup->wLength), transfer->timeout);
+
+	req.ucr_request.bmRequestType = setup->bmRequestType;
+	req.ucr_request.bRequest = setup->bRequest;
+	/* Don't use USETW, libusb already deals with the endianness */
+	(*(uint16_t *)req.ucr_request.wValue) = setup->wValue;
+	(*(uint16_t *)req.ucr_request.wIndex) = setup->wIndex;
+	(*(uint16_t *)req.ucr_request.wLength) = setup->wLength;
+	req.ucr_data = transfer->buffer + LIBUSB_CONTROL_SETUP_SIZE;
+
+	if ((transfer->flags & LIBUSB_TRANSFER_SHORT_NOT_OK) == 0)
+		req.ucr_flags = USBD_SHORT_XFER_OK;
+
+	if ((ioctl(dpriv->fd, USB_SET_TIMEOUT, &transfer->timeout)) < 0)
+		return _errno_to_libusb(errno);
+
+	if ((ioctl(dpriv->fd, USB_DO_REQUEST, &req)) < 0)
+		return _errno_to_libusb(errno);
+
+	itransfer->transferred = req.ucr_actlen;
+
+	usbi_dbg(ITRANSFER_CTX(itransfer), "transferred %d", itransfer->transferred);
+
+	return (0);
+}
+
+int
+_access_endpoint(struct libusb_transfer *transfer)
+{
+	struct handle_priv *hpriv;
+	struct device_priv *dpriv;
+	char *s, devnode[16];
+	int fd, endpt;
+	mode_t mode;
+
+	hpriv = usbi_get_device_handle_priv(transfer->dev_handle);
+	dpriv = usbi_get_device_priv(transfer->dev_handle->dev);
+
+	endpt = UE_GET_ADDR(transfer->endpoint);
+	mode = IS_XFERIN(transfer) ? O_RDONLY : O_WRONLY;
+
+	usbi_dbg(TRANSFER_CTX(transfer), "endpoint %d mode %d", endpt, mode);
+
+	if (hpriv->endpoints[endpt] < 0) {
+		/* Pick the right node given the control one */
+		strlcpy(devnode, dpriv->devnode, sizeof(devnode));
+		s = strchr(devnode, '.');
+		snprintf(s, 4, ".%02d", endpt);
+
+		/* We may need to read/write to the same endpoint later. */
+		if (((fd = open(devnode, O_RDWR)) < 0) && (errno == ENXIO))
+			if ((fd = open(devnode, mode)) < 0)
+				return (-1);
+
+		hpriv->endpoints[endpt] = fd;
+	}
+
+	return (hpriv->endpoints[endpt]);
+}
+
+int
+_sync_gen_transfer(struct usbi_transfer *itransfer)
+{
+	struct libusb_transfer *transfer;
+	int fd, nr = 1;
+
+	transfer = USBI_TRANSFER_TO_LIBUSB_TRANSFER(itransfer);
+
+	/*
+	 * Bulk, Interrupt or Isochronous transfer depends on the
+	 * endpoint and thus the node to open.
+	 */
+	if ((fd = _access_endpoint(transfer)) < 0)
+		return _errno_to_libusb(errno);
+
+	if ((ioctl(fd, USB_SET_TIMEOUT, &transfer->timeout)) < 0)
+		return _errno_to_libusb(errno);
+
+	if (IS_XFERIN(transfer)) {
+		if ((transfer->flags & LIBUSB_TRANSFER_SHORT_NOT_OK) == 0)
+			if ((ioctl(fd, USB_SET_SHORT_XFER, &nr)) < 0)
+				return _errno_to_libusb(errno);
+
+		nr = read(fd, transfer->buffer, transfer->length);
+	} else {
+		nr = write(fd, transfer->buffer, transfer->length);
+	}
+
+	if (nr < 0)
+		return _errno_to_libusb(errno);
+
+	itransfer->transferred = nr;
+
+	return (0);
+}