* Copyright (c) 2001 The NetBSD Foundation, Inc.

/* $NetBSD: uplcom.c,v 1.94 2022/07/06 15:24:14 hannken Exp $ */

/*
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Ichiro FUKUHARA ([email protected]).
*
* 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.
*/

/*
* General information: http://www.prolific.com.tw/fr_pl2303.htm
* http://www.hitachi-hitec.com/jyouhou/prolific/2303.pdf
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uplcom.c,v 1.94 2022/07/06 15:24:14 hannken Exp $");

#ifdef _KERNEL_OPT
#include "opt_usb.h"
#endif

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/kmem.h>
#include <sys/ioctl.h>
#include <sys/conf.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/select.h>
#include <sys/proc.h>
#include <sys/device.h>
#include <sys/poll.h>
#include <sys/sysctl.h>

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

#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdevs.h>
#include <dev/usb/usb_quirks.h>
#include <dev/usb/usbhist.h>

#include <dev/usb/ucomvar.h>

#ifdef USB_DEBUG
#ifndef UPLCOM_DEBUG
#define uplcomdebug 0
#else
int uplcomdebug = 0;

SYSCTL_SETUP(sysctl_hw_uplcom_setup, "sysctl hw.uplcom setup")
{
int err;
const struct sysctlnode *rnode;
const struct sysctlnode *cnode;

err = sysctl_createv(clog, 0, NULL, &rnode,
CTLFLAG_PERMANENT, CTLTYPE_NODE, "uplcom",
SYSCTL_DESCR("uplcom global controls"),
NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL);

if (err)
goto fail;

/* control debugging printfs */
err = sysctl_createv(clog, 0, &rnode, &cnode,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT,
"debug", SYSCTL_DESCR("Enable debugging output"),
NULL, 0, &uplcomdebug, sizeof(uplcomdebug), CTL_CREATE, CTL_EOL);
if (err)
goto fail;

return;
fail:
aprint_error("%s: sysctl_createv failed (err = %d)\n", __func__, err);
}

#endif /* UCOM_DEBUG */
#endif /* USB_DEBUG */

#define DPRINTF(FMT,A,B,C,D) USBHIST_LOGN(uplcomdebug,1,FMT,A,B,C,D)
#define DPRINTFN(N,FMT,A,B,C,D) USBHIST_LOGN(uplcomdebug,N,FMT,A,B,C,D)
#define UPLCOMHIST_FUNC() USBHIST_FUNC()
#define UPLCOMHIST_CALLED(name) USBHIST_CALLED(uplcomdebug)

#define UPLCOM_CONFIG_INDEX 0
#define UPLCOM_IFACE_INDEX 0
#define UPLCOM_SECOND_IFACE_INDEX 1

#define UPLCOM_SET_REQUEST 0x01
#define UPLCOM_SET_CRTSCTS_0 0x41
#define UPLCOM_SET_CRTSCTS_HX 0x61
#define UPLCOM_HX_STATUS_REG 0x8080

#define UPLCOM_N_SERIAL_CTS 0x80

#define UPLCOM_HXN_SET_REQUEST 0x80
#define UPLCOM_HXN_SET_CRTSCTS_REG 0x0A
#define UPLCOM_HXN_SET_CRTSCTS 0xFA

enum pl2303_type {
UPLCOM_TYPE_0, /* we use this for all non-HX variants */
UPLCOM_TYPE_HX,
UPLCOM_TYPE_HXN,
};

struct uplcom_softc {
device_t sc_dev; /* base device */
struct usbd_device * sc_udev; /* USB device */
struct usbd_interface * sc_iface; /* interface */
int sc_iface_number; /* interface number */

struct usbd_interface * sc_intr_iface; /* interrupt interface */
int sc_intr_number; /* interrupt number */
struct usbd_pipe * sc_intr_pipe; /* interrupt pipe */
u_char *sc_intr_buf; /* interrupt buffer */
int sc_isize;

usb_cdc_line_state_t sc_line_state; /* current line state */
int sc_dtr; /* current DTR state */
int sc_rts; /* current RTS state */

device_t sc_subdev; /* ucom device */

bool sc_dying; /* disconnecting */

u_char sc_lsr; /* Local status register */
u_char sc_msr; /* uplcom status register */

enum pl2303_type sc_type; /* PL2303 chip type */
};

/*
* These are the maximum number of bytes transferred per frame.
* The output buffer size cannot be increased due to the size encoding.
*/
#define UPLCOMIBUFSIZE 256
#define UPLCOMOBUFSIZE 256

static usbd_status uplcom_reset(struct uplcom_softc *);
static usbd_status uplcom_set_line_coding(struct uplcom_softc *,
usb_cdc_line_state_t *);
static usbd_status uplcom_set_crtscts(struct uplcom_softc *);
static void uplcom_intr(struct usbd_xfer *, void *, usbd_status);

static void uplcom_set(void *, int, int, int);
static void uplcom_dtr(struct uplcom_softc *, int);
static void uplcom_rts(struct uplcom_softc *, int);
static void uplcom_break(struct uplcom_softc *, int);
static void uplcom_set_line_state(struct uplcom_softc *);
static void uplcom_get_status(void *, int, u_char *, u_char *);
#if TODO
static int uplcom_ioctl(void *, int, u_long, void *, int, proc_t *);
#endif
static int uplcom_param(void *, int, struct termios *);
static int uplcom_open(void *, int);
static void uplcom_close(void *, int);
static usbd_status uplcom_vendor_control_write(struct usbd_device *, uint16_t, uint16_t);
static void uplcom_close_pipe(struct uplcom_softc *);

static const struct ucom_methods uplcom_methods = {
.ucom_get_status = uplcom_get_status,
.ucom_set = uplcom_set,
.ucom_param = uplcom_param,
.ucom_ioctl = NULL, /* TODO */
.ucom_open = uplcom_open,
.ucom_close = uplcom_close,
};

static const struct usb_devno uplcom_devs[] = {
/* I/O DATA USB-RSAQ2 */
{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_RSAQ2 },
/* I/O DATA USB-RSAQ3 */
{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_RSAQ3 },
/* I/O DATA USB-RSAQ */
{ USB_VENDOR_IODATA, USB_PRODUCT_IODATA_USBRSAQ },
/* I/O DATA USB-RSAQ5 */
{ USB_VENDOR_IODATA, USB_PRODUCT_IODATA_USBRSAQ5 },
/* PLANEX USB-RS232 URS-03 */
{ USB_VENDOR_ATEN, USB_PRODUCT_ATEN_UC232A },
/* various */
{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2303 },
/* SMART Technologies USB to serial */
{ USB_VENDOR_PROLIFIC2, USB_PRODUCT_PROLIFIC2_PL2303 },
/* IOGEAR/ATENTRIPPLITE */
{ USB_VENDOR_TRIPPLITE, USB_PRODUCT_TRIPPLITE_U209 },
/* ELECOM UC-SGT */
{ USB_VENDOR_ELECOM, USB_PRODUCT_ELECOM_UCSGT },
/* ELECOM UC-SGT0 */
{ USB_VENDOR_ELECOM, USB_PRODUCT_ELECOM_UCSGT0 },
/* Panasonic 50" Touch Panel */
{ USB_VENDOR_PANASONIC, USB_PRODUCT_PANASONIC_TYTP50P6S },
/* RATOC REX-USB60 */
{ USB_VENDOR_RATOC, USB_PRODUCT_RATOC_REXUSB60 },
/* TDK USB-PHS Adapter UHA6400 */
{ USB_VENDOR_TDK, USB_PRODUCT_TDK_UHA6400 },
/* TDK USB-PDC Adapter UPA9664 */
{ USB_VENDOR_TDK, USB_PRODUCT_TDK_UPA9664 },
/* Sony Ericsson USB Cable */
{ USB_VENDOR_SUSTEEN, USB_PRODUCT_SUSTEEN_DCU10 },
/* SOURCENEXT KeikaiDenwa 8 */
{ USB_VENDOR_SOURCENEXT, USB_PRODUCT_SOURCENEXT_KEIKAI8 },
/* SOURCENEXT KeikaiDenwa 8 with charger */
{ USB_VENDOR_SOURCENEXT, USB_PRODUCT_SOURCENEXT_KEIKAI8_CHG },
/* HAL Corporation Crossam2+USB */
{ USB_VENDOR_HAL, USB_PRODUCT_HAL_IMR001 },
/* Sitecom USB to serial cable */
{ USB_VENDOR_SITECOM, USB_PRODUCT_SITECOM_CN104 },
/* Pharos USB GPS - Microsoft version */
{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2303X },
/* Willcom WS002IN (DD) */
{ USB_VENDOR_NETINDEX, USB_PRODUCT_NETINDEX_WS002IN },
/* COREGA CG-USBRS232R */
{ USB_VENDOR_COREGA, USB_PRODUCT_COREGA_CGUSBRS232R },
/* Sharp CE-175TU (USB to Zaurus option port 15 adapter) */
{ USB_VENDOR_SHARP, USB_PRODUCT_SHARP_CE175TU },
/* Various */
{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2303GB },
{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2303GC },
{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2303GE },
{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2303GL },
{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2303GS },
{ USB_VENDOR_PROLIFIC, USB_PRODUCT_PROLIFIC_PL2303GT },
};
#define uplcom_lookup(v, p) usb_lookup(uplcom_devs, v, p)

static int uplcom_match(device_t, cfdata_t, void *);
static void uplcom_attach(device_t, device_t, void *);
static void uplcom_childdet(device_t, device_t);
static int uplcom_detach(device_t, int);

CFATTACH_DECL2_NEW(uplcom, sizeof(struct uplcom_softc), uplcom_match,
uplcom_attach, uplcom_detach, NULL, NULL, uplcom_childdet);

static int
uplcom_match(device_t parent, cfdata_t match, void *aux)
{
struct usb_attach_arg *uaa = aux;

return uplcom_lookup(uaa->uaa_vendor, uaa->uaa_product) != NULL ?
UMATCH_VENDOR_PRODUCT : UMATCH_NONE;
}

static void
uplcom_attach(device_t parent, device_t self, void *aux)
{
struct uplcom_softc *sc = device_private(self);
struct usb_attach_arg *uaa = aux;
struct usbd_device *dev = uaa->uaa_device;
usb_device_descriptor_t *ddesc;
usb_config_descriptor_t *cdesc;
usb_interface_descriptor_t *id;
usb_endpoint_descriptor_t *ed;
usb_device_request_t req;
char *devinfop;
const char *devname = device_xname(self);
usbd_status err;
uint8_t val;
int i;
struct ucom_attach_args ucaa;

UPLCOMHIST_FUNC(); UPLCOMHIST_CALLED();
DPRINTF("sc=%#jx", (uintptr_t)sc, 0, 0, 0);

sc->sc_dev = self;
sc->sc_dying = false;

aprint_naive("\n");
aprint_normal("\n");

devinfop = usbd_devinfo_alloc(dev, 0);
aprint_normal_dev(self, "%s\n", devinfop);
usbd_devinfo_free(devinfop);

sc->sc_udev = dev;

/* initialize endpoints */
ucaa.ucaa_bulkin = ucaa.ucaa_bulkout = -1;
sc->sc_intr_number = -1;
sc->sc_intr_pipe = NULL;

/* Move the device into the configured state. */
err = usbd_set_config_index(dev, UPLCOM_CONFIG_INDEX, 1);
if (err) {
aprint_error("\n%s: failed to set configuration, err=%s\n",
devname, usbd_errstr(err));
sc->sc_dying = true;
return;
}

/* determine chip type */
ddesc = usbd_get_device_descriptor(dev);
if (ddesc->bDeviceClass != UDCLASS_COMM &&
ddesc->bMaxPacketSize == 0x40)
sc->sc_type = UPLCOM_TYPE_HX;

if (sc->sc_type == UPLCOM_TYPE_HX) {
req.bmRequestType = UT_READ_VENDOR_DEVICE;
req.bRequest = UPLCOM_SET_REQUEST;
USETW(req.wValue, UPLCOM_HX_STATUS_REG);
USETW(req.wIndex, sc->sc_iface_number);
USETW(req.wLength, 1);

err = usbd_do_request(sc->sc_udev, &req, &val);
if (err)
sc->sc_type = UPLCOM_TYPE_HXN;
}

#ifdef UPLCOM_DEBUG
/* print the chip type */
if (sc->sc_type == UPLCOM_TYPE_HXN) {
DPRINTF("chiptype HXN", 0, 0, 0, 0);
} else if (sc->sc_type == UPLCOM_TYPE_HX) {
DPRINTF("chiptype HX", 0, 0, 0, 0);
} else {
DPRINTF("chiptype 0", 0, 0, 0, 0);
}
#endif

/* Move the device into the configured state. */
err = usbd_set_config_index(dev, UPLCOM_CONFIG_INDEX, 1);
if (err) {
aprint_error_dev(self, "failed to set configuration: %s\n",
usbd_errstr(err));
sc->sc_dying = true;
return;
}

/* get the config descriptor */
cdesc = usbd_get_config_descriptor(sc->sc_udev);

if (cdesc == NULL) {
aprint_error_dev(self,
"failed to get configuration descriptor\n");
sc->sc_dying = true;
return;
}

/* get the (first/common) interface */
err = usbd_device2interface_handle(dev, UPLCOM_IFACE_INDEX,
&sc->sc_iface);
if (err) {
aprint_error("\n%s: failed to get interface, err=%s\n",
devname, usbd_errstr(err));
sc->sc_dying = true;
return;
}

/* Find the interrupt endpoints */

id = usbd_get_interface_descriptor(sc->sc_iface);
sc->sc_iface_number = id->bInterfaceNumber;

for (i = 0; i < id->bNumEndpoints; i++) {
ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i);
if (ed == NULL) {
aprint_error_dev(self,
"no endpoint descriptor for %d\n", i);
sc->sc_dying = true;
return;
}

if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) {
sc->sc_intr_number = ed->bEndpointAddress;
sc->sc_isize = UGETW(ed->wMaxPacketSize);
}
}

if (sc->sc_intr_number== -1) {
aprint_error_dev(self, "Could not find interrupt in\n");
sc->sc_dying = true;
return;
}

/* keep interface for interrupt */
sc->sc_intr_iface = sc->sc_iface;

/*
* USB-RSAQ1 has two interface
*
* USB-RSAQ1 | USB-RSAQ2
* -----------------+-----------------
* Interface 0 |Interface 0
* Interrupt(0x81) | Interrupt(0x81)
* -----------------+ BulkIN(0x02)
* Interface 1 | BulkOUT(0x83)
* BulkIN(0x02) |
* BulkOUT(0x83) |
*/
if (cdesc->bNumInterface == 2) {
err = usbd_device2interface_handle(dev,
UPLCOM_SECOND_IFACE_INDEX, &sc->sc_iface);
if (err) {
aprint_error("\n%s: failed to get second interface, "
"err=%s\n", devname, usbd_errstr(err));
sc->sc_dying = true;
return;
}
}

/* Find the bulk{in,out} endpoints */

id = usbd_get_interface_descriptor(sc->sc_iface);
sc->sc_iface_number = id->bInterfaceNumber;

for (i = 0; i < id->bNumEndpoints; i++) {
ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i);
if (ed == NULL) {
aprint_error_dev(self,
"no endpoint descriptor for %d\n", i);
sc->sc_dying = true;
return;
}

if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
ucaa.ucaa_bulkin = ed->bEndpointAddress;
} else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
ucaa.ucaa_bulkout = ed->bEndpointAddress;
}
}

if (ucaa.ucaa_bulkin == -1) {
aprint_error_dev(self, "Could not find data bulk in\n");
sc->sc_dying = true;
return;
}

if (ucaa.ucaa_bulkout == -1) {
aprint_error_dev(self, "Could not find data bulk out\n");
sc->sc_dying = true;
return;
}

sc->sc_dtr = sc->sc_rts = -1;
ucaa.ucaa_portno = UCOM_UNK_PORTNO;
/* ucaa_bulkin, ucaa_bulkout set above */
ucaa.ucaa_ibufsize = UPLCOMIBUFSIZE;
ucaa.ucaa_obufsize = UPLCOMOBUFSIZE;
ucaa.ucaa_ibufsizepad = UPLCOMIBUFSIZE;
ucaa.ucaa_opkthdrlen = 0;
ucaa.ucaa_device = dev;
ucaa.ucaa_iface = sc->sc_iface;
ucaa.ucaa_methods = &uplcom_methods;
ucaa.ucaa_arg = sc;
ucaa.ucaa_info = NULL;

err = uplcom_reset(sc);

if (err) {
aprint_error_dev(self, "reset failed, %s\n", usbd_errstr(err));
sc->sc_dying = true;
return;
}

usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev);

DPRINTF("in=%#jx out=%#jx intr=%#jx",
ucaa.ucaa_bulkin, ucaa.ucaa_bulkout, sc->sc_intr_number, 0);
sc->sc_subdev = config_found(self, &ucaa, ucomprint,
CFARGS(.submatch = ucomsubmatch));

if (!pmf_device_register(self, NULL, NULL))
aprint_error_dev(self, "couldn't establish power handler\n");

return;
}

static void
uplcom_childdet(device_t self, device_t child)
{
struct uplcom_softc *sc = device_private(self);

UPLCOMHIST_FUNC(); UPLCOMHIST_CALLED();

KASSERT(sc->sc_subdev == child);
sc->sc_subdev = NULL;
}

static void
uplcom_close_pipe(struct uplcom_softc *sc)
{

if (sc->sc_intr_pipe != NULL) {
usbd_abort_pipe(sc->sc_intr_pipe);
usbd_close_pipe(sc->sc_intr_pipe);
sc->sc_intr_pipe = NULL;
}
if (sc->sc_intr_buf != NULL) {
kmem_free(sc->sc_intr_buf, sc->sc_isize);
sc->sc_intr_buf = NULL;
}
}

static int
uplcom_detach(device_t self, int flags)
{
struct uplcom_softc *sc = device_private(self);
int rv = 0;

UPLCOMHIST_FUNC(); UPLCOMHIST_CALLED();
DPRINTF("sc=%#jx flags=%jd", (uintptr_t)sc, flags, 0, 0);

sc->sc_dying = true;

uplcom_close_pipe(sc);

if (sc->sc_subdev != NULL) {
rv = config_detach(sc->sc_subdev, flags);
sc->sc_subdev = NULL;
}

usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev);

pmf_device_deregister(self);

return rv;
}

usbd_status
uplcom_reset(struct uplcom_softc *sc)
{
usb_device_request_t req;
usbd_status err;

if (sc->sc_type == UPLCOM_TYPE_HXN)
return 0;

req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
req.bRequest = UPLCOM_SET_REQUEST;
USETW(req.wValue, 0);
USETW(req.wIndex, sc->sc_iface_number);
USETW(req.wLength, 0);

err = usbd_do_request(sc->sc_udev, &req, 0);
if (err)
return EIO;

return 0;
}

struct pl2303x_init {
uint8_t req_type;
uint8_t request;
uint16_t value;
uint16_t index;
};

static const struct pl2303x_init pl2303x[] = {
{ UT_READ_VENDOR_DEVICE, UPLCOM_SET_REQUEST, 0x8484, 0 },
{ UT_WRITE_VENDOR_DEVICE, UPLCOM_SET_REQUEST, 0x0404, 0 },
{ UT_READ_VENDOR_DEVICE, UPLCOM_SET_REQUEST, 0x8484, 0 },
{ UT_READ_VENDOR_DEVICE, UPLCOM_SET_REQUEST, 0x8383, 0 },
{ UT_READ_VENDOR_DEVICE, UPLCOM_SET_REQUEST, 0x8484, 0 },
{ UT_WRITE_VENDOR_DEVICE, UPLCOM_SET_REQUEST, 0x0404, 1 },
{ UT_READ_VENDOR_DEVICE, UPLCOM_SET_REQUEST, 0x8484, 0 },
{ UT_READ_VENDOR_DEVICE, UPLCOM_SET_REQUEST, 0x8383, 0 },
{ UT_WRITE_VENDOR_DEVICE, UPLCOM_SET_REQUEST, 0, 1 },
{ UT_WRITE_VENDOR_DEVICE, UPLCOM_SET_REQUEST, 1, 0 },
{ UT_WRITE_VENDOR_DEVICE, UPLCOM_SET_REQUEST, 2, 0x44 }
};
#define N_PL2302X_INIT (sizeof(pl2303x)/sizeof(pl2303x[0]))

static usbd_status
uplcom_pl2303x_init(struct uplcom_softc *sc)
{
usb_device_request_t req;
usbd_status err;
int i;

for (i = 0; i < N_PL2302X_INIT; i++) {
char buf[1];
void *b;

req.bmRequestType = pl2303x[i].req_type;
req.bRequest = pl2303x[i].request;
USETW(req.wValue, pl2303x[i].value);
USETW(req.wIndex, pl2303x[i].index);
if (UT_GET_DIR(req.bmRequestType) == UT_READ) {
b = buf;
USETW(req.wLength, sizeof(buf));
} else {
b = NULL;
USETW(req.wLength, 0);
}

err = usbd_do_request(sc->sc_udev, &req, b);
if (err) {
aprint_error_dev(sc->sc_dev,
"uplcom_pl2303x_init failed: %s\n",
usbd_errstr(err));
return EIO;
}
}

return 0;
}

static void
uplcom_set_line_state(struct uplcom_softc *sc)
{
usb_device_request_t req;
int ls;

/* make sure we have initialized state for sc_dtr and sc_rts */
if (sc->sc_dtr == -1)
sc->sc_dtr = 0;
if (sc->sc_rts == -1)
sc->sc_rts = 0;

ls = (sc->sc_dtr ? UCDC_LINE_DTR : 0) |
(sc->sc_rts ? UCDC_LINE_RTS : 0);

req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
req.bRequest = UCDC_SET_CONTROL_LINE_STATE;
USETW(req.wValue, ls);
USETW(req.wIndex, sc->sc_iface_number);
USETW(req.wLength, 0);

(void)usbd_do_request(sc->sc_udev, &req, 0);
}

static void
uplcom_set(void *addr, int portno, int reg, int onoff)
{
struct uplcom_softc *sc = addr;

if (sc->sc_dying)
return;

switch (reg) {
case UCOM_SET_DTR:
uplcom_dtr(sc, onoff);
break;
case UCOM_SET_RTS:
uplcom_rts(sc, onoff);
break;
case UCOM_SET_BREAK:
uplcom_break(sc, onoff);
break;
default:
break;
}
}

static void
uplcom_dtr(struct uplcom_softc *sc, int onoff)
{

UPLCOMHIST_FUNC(); UPLCOMHIST_CALLED();
DPRINTF("onoff=%jd", onoff, 0, 0, 0);

if (sc->sc_dtr != -1 && !sc->sc_dtr == !onoff)
return;

sc->sc_dtr = !!onoff;

uplcom_set_line_state(sc);
}

static void
uplcom_rts(struct uplcom_softc *sc, int onoff)
{
UPLCOMHIST_FUNC(); UPLCOMHIST_CALLED();
DPRINTF("onoff=%jd", onoff, 0, 0, 0);

if (sc->sc_rts != -1 && !sc->sc_rts == !onoff)
return;

sc->sc_rts = !!onoff;

uplcom_set_line_state(sc);
}

static void
uplcom_break(struct uplcom_softc *sc, int onoff)
{
usb_device_request_t req;

UPLCOMHIST_FUNC(); UPLCOMHIST_CALLED();
DPRINTF("onoff=%jd", onoff, 0, 0, 0);

req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
req.bRequest = UCDC_SEND_BREAK;
USETW(req.wValue, onoff ? UCDC_BREAK_ON : UCDC_BREAK_OFF);
USETW(req.wIndex, sc->sc_iface_number);
USETW(req.wLength, 0);

(void)usbd_do_request(sc->sc_udev, &req, 0);
}

static usbd_status
uplcom_set_crtscts(struct uplcom_softc *sc)
{
usb_device_request_t req;
usbd_status err;

UPLCOMHIST_FUNC(); UPLCOMHIST_CALLED();

req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
if (sc->sc_type == UPLCOM_TYPE_HXN) {
req.bRequest = UPLCOM_HXN_SET_REQUEST;
USETW(req.wValue, UPLCOM_HXN_SET_CRTSCTS_REG);
} else {
req.bRequest = UPLCOM_SET_REQUEST;
USETW(req.wValue, 0);
}

if (sc->sc_type == UPLCOM_TYPE_HXN)
USETW(req.wIndex, UPLCOM_HXN_SET_CRTSCTS);
else if (sc->sc_type == UPLCOM_TYPE_HX)
USETW(req.wIndex, UPLCOM_SET_CRTSCTS_HX);
else
USETW(req.wIndex, UPLCOM_SET_CRTSCTS_0);
USETW(req.wLength, 0);

err = usbd_do_request(sc->sc_udev, &req, 0);
if (err) {
DPRINTF("failed, err=%jd", err, 0, 0, 0);
return err;
}

return USBD_NORMAL_COMPLETION;
}

static usbd_status
uplcom_set_line_coding(struct uplcom_softc *sc, usb_cdc_line_state_t *state)
{
usb_device_request_t req;
usbd_status err;

UPLCOMHIST_FUNC(); UPLCOMHIST_CALLED();

DPRINTF("rate=%jd fmt=%jd parity=%jd bits=%jd",
UGETDW(state->dwDTERate), state->bCharFormat,
state->bParityType, state->bDataBits);

if (memcmp(state, &sc->sc_line_state, UCDC_LINE_STATE_LENGTH) == 0) {
DPRINTF("already set", 0, 0, 0, 0);
return USBD_NORMAL_COMPLETION;
}

req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
req.bRequest = UCDC_SET_LINE_CODING;
USETW(req.wValue, 0);
USETW(req.wIndex, sc->sc_iface_number);
USETW(req.wLength, UCDC_LINE_STATE_LENGTH);

err = usbd_do_request(sc->sc_udev, &req, state);
if (err) {
DPRINTF("failed, err=%ju", err, 0, 0, 0);
return err;
}

sc->sc_line_state = *state;

return USBD_NORMAL_COMPLETION;
}

static int
uplcom_param(void *addr, int portno, struct termios *t)
{
struct uplcom_softc *sc = addr;
usbd_status err;
usb_cdc_line_state_t ls;

UPLCOMHIST_FUNC(); UPLCOMHIST_CALLED();
DPRINTF("sc=%#jx", (uintptr_t)sc, 0, 0, 0);

if (sc->sc_dying)
return EIO;

USETDW(ls.dwDTERate, t->c_ospeed);
if (ISSET(t->c_cflag, CSTOPB))
ls.bCharFormat = UCDC_STOP_BIT_2;
else
ls.bCharFormat = UCDC_STOP_BIT_1;
if (ISSET(t->c_cflag, PARENB)) {
if (ISSET(t->c_cflag, PARODD))
ls.bParityType = UCDC_PARITY_ODD;
else
ls.bParityType = UCDC_PARITY_EVEN;
} else
ls.bParityType = UCDC_PARITY_NONE;
switch (ISSET(t->c_cflag, CSIZE)) {
case CS5:
ls.bDataBits = 5;
break;
case CS6:
ls.bDataBits = 6;
break;
case CS7:
ls.bDataBits = 7;
break;
case CS8:
ls.bDataBits = 8;
break;
}

err = uplcom_set_line_coding(sc, &ls);
if (err) {
DPRINTF("err=%jd", err, 0, 0, 0);
return EIO;
}

if (ISSET(t->c_cflag, CRTSCTS))
uplcom_set_crtscts(sc);

if (sc->sc_rts == -1 || sc->sc_dtr == -1)
uplcom_set_line_state(sc);

if (err) {
DPRINTF("err=%jd", err, 0, 0, 0);
return EIO;
}

return 0;
}

static usbd_status
uplcom_vendor_control_write(struct usbd_device *dev, uint16_t value,
uint16_t index)
{
usb_device_request_t req;
usbd_status err;

UPLCOMHIST_FUNC(); UPLCOMHIST_CALLED();

req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
req.bRequest = UPLCOM_SET_REQUEST;
USETW(req.wValue, value);
USETW(req.wIndex, index);
USETW(req.wLength, 0);

err = usbd_do_request(dev, &req, NULL);

if (err) {
DPRINTF("vendor write failed, err=%jd", err, 0, 0, 0);
}

return err;
}

static int
uplcom_open(void *addr, int portno)
{
struct uplcom_softc *sc = addr;
usbd_status err = 0;

UPLCOMHIST_FUNC(); UPLCOMHIST_CALLED();
DPRINTF("sc=%#jx", (uintptr_t)sc, 0, 0, 0);

if (sc->sc_dying)
return EIO;

/* Some unknown device frobbing. */
if (sc->sc_type == UPLCOM_TYPE_HX)
uplcom_vendor_control_write(sc->sc_udev, 2, 0x44);
else
uplcom_vendor_control_write(sc->sc_udev, 2, 0x24);

if (sc->sc_intr_number != -1 && sc->sc_intr_pipe == NULL) {
sc->sc_intr_buf = kmem_alloc(sc->sc_isize, KM_SLEEP);
err = usbd_open_pipe_intr(sc->sc_intr_iface, sc->sc_intr_number,
USBD_SHORT_XFER_OK, &sc->sc_intr_pipe, sc,
sc->sc_intr_buf, sc->sc_isize,
uplcom_intr, USBD_DEFAULT_INTERVAL);
if (err) {
DPRINTF("cannot open interrupt pipe (addr %jd)",
sc->sc_intr_number, 0, 0, 0);
}
}

if (err == 0 && sc->sc_type == UPLCOM_TYPE_HX)
err = uplcom_pl2303x_init(sc);

return err;
}

static void
uplcom_close(void *addr, int portno)
{
struct uplcom_softc *sc = addr;

UPLCOMHIST_FUNC(); UPLCOMHIST_CALLED();
DPRINTF("sc=%#jx", (uintptr_t)sc, 0, 0, 0);

if (sc->sc_dying)
return;

uplcom_close_pipe(sc);
}

static void
uplcom_intr(struct usbd_xfer *xfer, void *priv, usbd_status status)
{
struct uplcom_softc *sc = priv;
u_char *buf = sc->sc_intr_buf;
u_char pstatus;

UPLCOMHIST_FUNC(); UPLCOMHIST_CALLED();

if (sc->sc_dying)
return;

if (status != USBD_NORMAL_COMPLETION) {
if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
return;

DPRINTF("abnormal status: %ju", status, 0, 0, 0);
usbd_clear_endpoint_stall_async(sc->sc_intr_pipe);
return;
}

DPRINTF("uplcom status = %02jx", buf[8], 0, 0, 0);

sc->sc_lsr = sc->sc_msr = 0;
pstatus = buf[8];
if (ISSET(pstatus, UPLCOM_N_SERIAL_CTS))
sc->sc_msr |= UMSR_CTS;
if (ISSET(pstatus, UCDC_N_SERIAL_RI))
sc->sc_msr |= UMSR_RI;
if (ISSET(pstatus, UCDC_N_SERIAL_DSR))
sc->sc_msr |= UMSR_DSR;
if (ISSET(pstatus, UCDC_N_SERIAL_DCD))
sc->sc_msr |= UMSR_DCD;
ucom_status_change(device_private(sc->sc_subdev));
}

static void
uplcom_get_status(void *addr, int portno, u_char *lsr, u_char *msr)
{
struct uplcom_softc *sc = addr;

UPLCOMHIST_FUNC(); UPLCOMHIST_CALLED();

if (sc->sc_dying)
return;

*lsr = sc->sc_lsr;
*msr = sc->sc_msr;
}

#if TODO
static int
uplcom_ioctl(void *addr, int portno, u_long cmd, void *data, int flag,
proc_t *p)
{
struct uplcom_softc *sc = addr;
int error = 0;

UPLCOMHIST_FUNC(); UPLCOMHIST_CALLED();

if (sc->sc_dying)
return EIO;

DPRINTF("cmd=0x%08lx", cmd, 0, 0, 0);

switch (cmd) {
case TIOCNOTTY:
case TIOCMGET:
case TIOCMSET:
case USB_GET_CM_OVER_DATA:
case USB_SET_CM_OVER_DATA:
break;

default:
DPRINTF("unknown", 0, 0, 0, 0);
error = ENOTTY;
break;
}

return error;
}
#endif