/*	$OpenBSD: usbdi_util.c,v 1.26 2010/12/17 23:14:00 jakemsr Exp $ */
/*	$NetBSD: usbdi_util.c,v 1.40 2002/07/11 21:14:36 augustss Exp $	*/
/*	$FreeBSD: src/sys/dev/usb/usbdi_util.c,v 1.14 1999/11/17 22:33:50 n_hibma Exp $	*/

/*
 * Copyright (c) 1998 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Lennart Augustsson (lennart@augustsson.net) at
 * Carlstedt Research & Technology.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/device.h>

#include <dev/usb/usb.h>
#include <dev/usb/usbhid.h>

#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>

#ifdef USB_DEBUG
#define DPRINTF(x)	do { if (usbdebug) printf x; } while (0)
#define DPRINTFN(n,x)	do { if (usbdebug>(n)) printf x; } while (0)
extern int usbdebug;
#else
#define DPRINTF(x)
#define DPRINTFN(n,x)
#endif

usbd_status
usbd_get_desc(usbd_device_handle dev, int type, int index, int len, void *desc)
{
	usb_device_request_t req;

	DPRINTFN(3,("usbd_get_desc: type=%d, index=%d, len=%d\n", type, index,
	    len));

	req.bmRequestType = UT_READ_DEVICE;
	req.bRequest = UR_GET_DESCRIPTOR;
	USETW2(req.wValue, type, index);
	USETW(req.wIndex, 0);
	USETW(req.wLength, len);
	return (usbd_do_request(dev, &req, desc));
}

usbd_status
usbd_get_config_desc(usbd_device_handle dev, int confidx,
    usb_config_descriptor_t *d)
{
	usbd_status err;

	DPRINTFN(3,("usbd_get_config_desc: confidx=%d\n", confidx));
	err = usbd_get_desc(dev, UDESC_CONFIG, confidx,
	    USB_CONFIG_DESCRIPTOR_SIZE, d);
	if (err)
		return (err);
	if (d->bDescriptorType != UDESC_CONFIG) {
		DPRINTFN(-1,("usbd_get_config_desc: confidx=%d, bad desc "
		    "len=%d type=%d\n", confidx, d->bLength,
		    d->bDescriptorType));
		return (USBD_INVAL);
	}
	return (USBD_NORMAL_COMPLETION);
}

usbd_status
usbd_get_config_desc_full(usbd_device_handle dev, int conf, void *d, int size)
{
	DPRINTFN(3,("usbd_get_config_desc_full: conf=%d\n", conf));
	return (usbd_get_desc(dev, UDESC_CONFIG, conf, size, d));
}

usbd_status
usbd_get_device_desc(usbd_device_handle dev, usb_device_descriptor_t *d)
{
	DPRINTFN(3,("usbd_get_device_desc:\n"));
	return (usbd_get_desc(dev, UDESC_DEVICE, 0, USB_DEVICE_DESCRIPTOR_SIZE,
	    d));
}

usbd_status
usbd_get_device_status(usbd_device_handle dev, usb_status_t *st)
{
	usb_device_request_t req;

	req.bmRequestType = UT_READ_DEVICE;
	req.bRequest = UR_GET_STATUS;
	USETW(req.wValue, 0);
	USETW(req.wIndex, 0);
	USETW(req.wLength, sizeof(usb_status_t));
	return (usbd_do_request(dev, &req, st));
}

usbd_status
usbd_get_hub_status(usbd_device_handle dev, usb_hub_status_t *st)
{
	usb_device_request_t req;

	req.bmRequestType = UT_READ_CLASS_DEVICE;
	req.bRequest = UR_GET_STATUS;
	USETW(req.wValue, 0);
	USETW(req.wIndex, 0);
	USETW(req.wLength, sizeof(usb_hub_status_t));
	return (usbd_do_request(dev, &req, st));
}

usbd_status
usbd_set_address(usbd_device_handle dev, int addr)
{
	usb_device_request_t req;

	req.bmRequestType = UT_WRITE_DEVICE;
	req.bRequest = UR_SET_ADDRESS;
	USETW(req.wValue, addr);
	USETW(req.wIndex, 0);
	USETW(req.wLength, 0);
	return usbd_do_request(dev, &req, 0);
}

usbd_status
usbd_get_port_status(usbd_device_handle dev, int port, usb_port_status_t *ps)
{
	usb_device_request_t req;

	req.bmRequestType = UT_READ_CLASS_OTHER;
	req.bRequest = UR_GET_STATUS;
	USETW(req.wValue, 0);
	USETW(req.wIndex, port);
	USETW(req.wLength, sizeof *ps);
	return (usbd_do_request(dev, &req, ps));
}

usbd_status
usbd_clear_hub_feature(usbd_device_handle dev, int sel)
{
	usb_device_request_t req;

	req.bmRequestType = UT_WRITE_CLASS_DEVICE;
	req.bRequest = UR_CLEAR_FEATURE;
	USETW(req.wValue, sel);
	USETW(req.wIndex, 0);
	USETW(req.wLength, 0);
	return (usbd_do_request(dev, &req, 0));
}

usbd_status
usbd_set_hub_feature(usbd_device_handle dev, int sel)
{
	usb_device_request_t req;

	req.bmRequestType = UT_WRITE_CLASS_DEVICE;
	req.bRequest = UR_SET_FEATURE;
	USETW(req.wValue, sel);
	USETW(req.wIndex, 0);
	USETW(req.wLength, 0);
	return (usbd_do_request(dev, &req, 0));
}

usbd_status
usbd_clear_port_feature(usbd_device_handle dev, int port, int sel)
{
	usb_device_request_t req;

	req.bmRequestType = UT_WRITE_CLASS_OTHER;
	req.bRequest = UR_CLEAR_FEATURE;
	USETW(req.wValue, sel);
	USETW(req.wIndex, port);
	USETW(req.wLength, 0);
	return (usbd_do_request(dev, &req, 0));
}

usbd_status
usbd_set_port_feature(usbd_device_handle dev, int port, int sel)
{
	usb_device_request_t req;

	req.bmRequestType = UT_WRITE_CLASS_OTHER;
	req.bRequest = UR_SET_FEATURE;
	USETW(req.wValue, sel);
	USETW(req.wIndex, port);
	USETW(req.wLength, 0);
	return (usbd_do_request(dev, &req, 0));
}

usbd_status
usbd_get_protocol(usbd_interface_handle iface, u_int8_t *report)
{
	usb_interface_descriptor_t *id = usbd_get_interface_descriptor(iface);
	usbd_device_handle dev;
	usb_device_request_t req;

	DPRINTFN(4, ("usbd_get_protocol: iface=%p, endpt=%d\n", iface,
	    id->bInterfaceNumber));
	if (id == NULL)
		return (USBD_IOERROR);
	usbd_interface2device_handle(iface, &dev);
	req.bmRequestType = UT_READ_CLASS_INTERFACE;
	req.bRequest = UR_GET_PROTOCOL;
	USETW(req.wValue, 0);
	USETW(req.wIndex, id->bInterfaceNumber);
	USETW(req.wLength, 1);
	return (usbd_do_request(dev, &req, report));
}

usbd_status
usbd_set_protocol(usbd_interface_handle iface, int report)
{
	usb_interface_descriptor_t *id = usbd_get_interface_descriptor(iface);
	usbd_device_handle dev;
	usb_device_request_t req;

	DPRINTFN(4, ("usbd_set_protocol: iface=%p, report=%d, endpt=%d\n",
	    iface, report, id->bInterfaceNumber));
	if (id == NULL)
		return (USBD_IOERROR);
	usbd_interface2device_handle(iface, &dev);
	req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
	req.bRequest = UR_SET_PROTOCOL;
	USETW(req.wValue, report);
	USETW(req.wIndex, id->bInterfaceNumber);
	USETW(req.wLength, 0);
	return (usbd_do_request(dev, &req, 0));
}

usbd_status
usbd_set_report(usbd_interface_handle iface, int type, int id, void *data,
    int len)
{
	usb_interface_descriptor_t *ifd = usbd_get_interface_descriptor(iface);
	usbd_device_handle dev;
	usb_device_request_t req;

	DPRINTFN(4, ("usbd_set_report: len=%d\n", len));
	if (ifd == NULL)
		return (USBD_IOERROR);
	usbd_interface2device_handle(iface, &dev);
	req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
	req.bRequest = UR_SET_REPORT;
	USETW2(req.wValue, type, id);
	USETW(req.wIndex, ifd->bInterfaceNumber);
	USETW(req.wLength, len);
	return (usbd_do_request(dev, &req, data));
}

usbd_status
usbd_set_report_async(usbd_interface_handle iface, int type, int id,
    void *data, int len)
{
	usb_interface_descriptor_t *ifd = usbd_get_interface_descriptor(iface);
	usbd_device_handle dev;
	usb_device_request_t req;

	DPRINTFN(4, ("usbd_set_report_async: len=%d\n", len));
	if (ifd == NULL)
		return (USBD_IOERROR);
	usbd_interface2device_handle(iface, &dev);
	req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
	req.bRequest = UR_SET_REPORT;
	USETW2(req.wValue, type, id);
	USETW(req.wIndex, ifd->bInterfaceNumber);
	USETW(req.wLength, len);
	return (usbd_do_request_async(dev, &req, data));
}

usbd_status
usbd_get_report(usbd_interface_handle iface, int type, int id, void *data,
    int len)
{
	usb_interface_descriptor_t *ifd = usbd_get_interface_descriptor(iface);
	usbd_device_handle dev;
	usb_device_request_t req;

	DPRINTFN(4, ("usbd_get_report: len=%d\n", len));
	if (ifd == NULL)
		return (USBD_IOERROR);
	usbd_interface2device_handle(iface, &dev);
	req.bmRequestType = UT_READ_CLASS_INTERFACE;
	req.bRequest = UR_GET_REPORT;
	USETW2(req.wValue, type, id);
	USETW(req.wIndex, ifd->bInterfaceNumber);
	USETW(req.wLength, len);
	return (usbd_do_request(dev, &req, data));
}

usbd_status
usbd_set_idle(usbd_interface_handle iface, int duration, int id)
{
	usb_interface_descriptor_t *ifd = usbd_get_interface_descriptor(iface);
	usbd_device_handle dev;
	usb_device_request_t req;

	DPRINTFN(4, ("usbd_set_idle: %d %d\n", duration, id));
	if (ifd == NULL)
		return (USBD_IOERROR);
	usbd_interface2device_handle(iface, &dev);
	req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
	req.bRequest = UR_SET_IDLE;
	USETW2(req.wValue, duration, id);
	USETW(req.wIndex, ifd->bInterfaceNumber);
	USETW(req.wLength, 0);
	return (usbd_do_request(dev, &req, 0));
}

usbd_status
usbd_get_report_descriptor(usbd_device_handle dev, int ifcno, int size,
    void *d)
{
	usb_device_request_t req;

	req.bmRequestType = UT_READ_INTERFACE;
	req.bRequest = UR_GET_DESCRIPTOR;
	USETW2(req.wValue, UDESC_REPORT, 0); /* report id should be 0 */
	USETW(req.wIndex, ifcno);
	USETW(req.wLength, size);
	return (usbd_do_request(dev, &req, d));
}

usb_hid_descriptor_t *
usbd_get_hid_descriptor(usbd_interface_handle ifc)
{
	usb_interface_descriptor_t *idesc = usbd_get_interface_descriptor(ifc);
	usbd_device_handle dev;
	usb_config_descriptor_t *cdesc;
	usb_hid_descriptor_t *hd;
	char *p, *end;

	if (idesc == NULL)
		return (0);
	usbd_interface2device_handle(ifc, &dev);
	cdesc = usbd_get_config_descriptor(dev);

	p = (char *)idesc + idesc->bLength;
	end = (char *)cdesc + UGETW(cdesc->wTotalLength);

	for (; p < end; p += hd->bLength) {
		hd = (usb_hid_descriptor_t *)p;
		if (p + hd->bLength <= end && hd->bDescriptorType == UDESC_HID)
			return (hd);
		if (hd->bDescriptorType == UDESC_INTERFACE)
			break;
	}
	return (0);
}

usbd_status
usbd_read_report_desc(usbd_interface_handle ifc, void **descp, int *sizep,
    int mem)
{
	usb_interface_descriptor_t *id;
	usb_hid_descriptor_t *hid;
	usbd_device_handle dev;
	usbd_status err;

	usbd_interface2device_handle(ifc, &dev);
	id = usbd_get_interface_descriptor(ifc);
	if (id == NULL)
		return (USBD_INVAL);
	hid = usbd_get_hid_descriptor(ifc);
	if (hid == NULL)
		return (USBD_IOERROR);
	*sizep = UGETW(hid->descrs[0].wDescriptorLength);
	*descp = malloc(*sizep, mem, M_NOWAIT);
	if (*descp == NULL)
		return (USBD_NOMEM);
	err = usbd_get_report_descriptor(dev, id->bInterfaceNumber, *sizep,
	    *descp);
	if (err) {
		free(*descp, mem);
		*descp = NULL;
		return (err);
	}
	return (USBD_NORMAL_COMPLETION);
}

usbd_status
usbd_get_config(usbd_device_handle dev, u_int8_t *conf)
{
	usb_device_request_t req;

	req.bmRequestType = UT_READ_DEVICE;
	req.bRequest = UR_GET_CONFIG;
	USETW(req.wValue, 0);
	USETW(req.wIndex, 0);
	USETW(req.wLength, 1);
	return (usbd_do_request(dev, &req, conf));
}

void usbd_bulk_transfer_cb(usbd_xfer_handle xfer, usbd_private_handle priv,
    usbd_status status);
void
usbd_bulk_transfer_cb(usbd_xfer_handle xfer, usbd_private_handle priv,
    usbd_status status)
{
	wakeup(xfer);
}

usbd_status
usbd_bulk_transfer(usbd_xfer_handle xfer, usbd_pipe_handle pipe,
    u_int16_t flags, u_int32_t timeout, void *buf, u_int32_t *size, char *lbl)
{
	usbd_status err;
	int s, error, pri;

	usbd_setup_xfer(xfer, pipe, 0, buf, *size, flags, timeout,
	    usbd_bulk_transfer_cb);
	DPRINTFN(1, ("usbd_bulk_transfer: start transfer %d bytes\n", *size));
	s = splusb();		/* don't want callback until tsleep() */
	err = usbd_transfer(xfer);
	if (err != USBD_IN_PROGRESS) {
		splx(s);
		return (err);
	}
	pri = timeout == 0 ? (PZERO | PCATCH) : PZERO;
	error = tsleep((caddr_t)xfer, pri, lbl, 0);
	splx(s);
	if (error) {
		DPRINTF(("usbd_bulk_transfer: tsleep=%d\n", error));
		usbd_abort_pipe(pipe);
		return (USBD_INTERRUPTED);
	}
	usbd_get_xfer_status(xfer, NULL, NULL, size, &err);
	DPRINTFN(1,("usbd_bulk_transfer: transferred %d\n", *size));
	if (err) {
		DPRINTF(("usbd_bulk_transfer: error=%d\n", err));
		usbd_clear_endpoint_stall(pipe);
	}
	return (err);
}

void usbd_intr_transfer_cb(usbd_xfer_handle xfer, usbd_private_handle priv,
    usbd_status status);
void
usbd_intr_transfer_cb(usbd_xfer_handle xfer, usbd_private_handle priv,
    usbd_status status)
{
	wakeup(xfer);
}

usbd_status
usbd_intr_transfer(usbd_xfer_handle xfer, usbd_pipe_handle pipe,
    u_int16_t flags, u_int32_t timeout, void *buf, u_int32_t *size, char *lbl)
{
	usbd_status err;
	int s, error, pri;

	usbd_setup_xfer(xfer, pipe, 0, buf, *size, flags, timeout,
	    usbd_intr_transfer_cb);
	DPRINTFN(1, ("usbd_intr_transfer: start transfer %d bytes\n", *size));
	s = splusb();		/* don't want callback until tsleep() */
	err = usbd_transfer(xfer);
	if (err != USBD_IN_PROGRESS) {
		splx(s);
		return (err);
	}
	pri = timeout == 0 ? (PZERO | PCATCH) : PZERO;
	error = tsleep(xfer, pri, lbl, 0);
	splx(s);
	if (error) {
		DPRINTF(("usbd_intr_transfer: tsleep=%d\n", error));
		usbd_abort_pipe(pipe);
		return (USBD_INTERRUPTED);
	}
	usbd_get_xfer_status(xfer, NULL, NULL, size, &err);
	DPRINTFN(1,("usbd_intr_transfer: transferred %d\n", *size));
	if (err) {
		DPRINTF(("usbd_intr_transfer: error=%d\n", err));
		usbd_clear_endpoint_stall(pipe);
	}
	return (err);
}

void
usb_detach_wait(struct device *dv)
{
	DPRINTF(("usb_detach_wait: waiting for %s\n", dv->dv_xname));
	if (tsleep(dv, PZERO, "usbdet", hz * 60))
		printf("usb_detach_wait: %s didn't detach\n", dv->dv_xname);
	DPRINTF(("usb_detach_wait: %s done\n", dv->dv_xname));
}

void
usb_detach_wakeup(struct device *dv)
{
	DPRINTF(("usb_detach_wakeup: for %s\n", dv->dv_xname));
	wakeup(dv);
}

usb_descriptor_t *
usb_find_desc(usbd_device_handle dev, int type)
{
	usb_descriptor_t *desc;
	usb_config_descriptor_t *cd = usbd_get_config_descriptor(dev);
        uByte *p = (uByte *)cd;
        uByte *end = p + UGETW(cd->wTotalLength);

	while (p < end) {
		desc = (usb_descriptor_t *)p;
		if (desc->bDescriptorType == type)
			return (desc);
		p += desc->bLength;
	}

	return (NULL);
}