freebsd-dev/sys/dev/usb/ufm.c
Ed Schouten 6bfa9a2d66 Replace all calls to minor() with dev2unit().
After I removed all the unit2minor()/minor2unit() calls from the kernel
yesterday, I realised calling minor() everywhere is quite confusing.
Character devices now only have the ability to store a unit number, not
a minor number. Remove the confusion by using dev2unit() everywhere.

This commit could also be considered as a bug fix. A lot of drivers call
minor(), while they should actually be calling dev2unit(). In -CURRENT
this isn't a problem, but it turns out we never had any problem reports
related to that issue in the past. I suspect not many people connect
more than 256 pieces of the same hardware.

Reviewed by:	kib
2008-09-27 08:51:18 +00:00

377 lines
8.6 KiB
C

/*-
* Copyright (c) 2001-2007 M. Warner Losh
* All rights reserved.
*
* 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 AUTHOR 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 AUTHOR 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.
*
* This code is based on ugen.c and ulpt.c developed by Lennart Augustsson.
* This code includes software developed by the NetBSD Foundation, Inc. and
* its contributors.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/ioccom.h>
#include <sys/fcntl.h>
#include <sys/filio.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/selinfo.h>
#include <sys/poll.h>
#include <sys/sysctl.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include "usbdevs.h"
#include <dev/usb/dsbr100io.h>
#ifdef USB_DEBUG
#define DPRINTF(x) if (ufmdebug) printf x
#define DPRINTFN(n,x) if (ufmdebug>(n)) printf x
int ufmdebug = 0;
SYSCTL_NODE(_hw_usb, OID_AUTO, ufm, CTLFLAG_RW, 0, "USB ufm");
SYSCTL_INT(_hw_usb_ufm, OID_AUTO, debug, CTLFLAG_RW,
&ufmdebug, 0, "ufm debug level");
#else
#define DPRINTF(x)
#define DPRINTFN(n,x)
#endif
d_open_t ufmopen;
d_close_t ufmclose;
d_ioctl_t ufmioctl;
static struct cdevsw ufm_cdevsw = {
.d_version = D_VERSION,
.d_flags = D_NEEDGIANT,
.d_open = ufmopen,
.d_close = ufmclose,
.d_ioctl = ufmioctl,
.d_name = "ufm",
};
#define FM_CMD0 0x00
#define FM_CMD_SET_FREQ 0x01
#define FM_CMD2 0x02
struct ufm_softc {
device_t sc_dev;
usbd_device_handle sc_udev;
usbd_interface_handle sc_iface;
int sc_opened;
int sc_epaddr;
int sc_freq;
int sc_refcnt;
};
#define UFMUNIT(n) (dev2unit(n))
static device_probe_t ufm_match;
static device_attach_t ufm_attach;
static device_detach_t ufm_detach;
static device_method_t ufm_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ufm_match),
DEVMETHOD(device_attach, ufm_attach),
DEVMETHOD(device_detach, ufm_detach),
{ 0, 0 }
};
static driver_t ufm_driver = {
"ufm",
ufm_methods,
sizeof(struct ufm_softc)
};
static devclass_t ufm_devclass;
static int
ufm_match(device_t self)
{
struct usb_attach_arg *uaa = device_get_ivars(self);
usb_device_descriptor_t *dd;
DPRINTFN(10,("ufm_match\n"));
if (!uaa->iface)
return UMATCH_NONE;
dd = usbd_get_device_descriptor(uaa->device);
if (dd &&
((UGETW(dd->idVendor) == USB_VENDOR_CYPRESS &&
UGETW(dd->idProduct) == USB_PRODUCT_CYPRESS_FMRADIO)))
return UMATCH_VENDOR_PRODUCT;
else
return UMATCH_NONE;
}
static int
ufm_attach(device_t self)
{
struct ufm_softc *sc = device_get_softc(self);
struct usb_attach_arg *uaa = device_get_ivars(self);
usb_endpoint_descriptor_t *edesc;
usbd_device_handle udev;
usbd_interface_handle iface;
u_int8_t epcount;
usbd_status r;
char * ermsg = "<none>";
DPRINTFN(10,("ufm_attach: sc=%p\n", sc));
sc->sc_dev = self;
sc->sc_udev = udev = uaa->device;
if ((!uaa->device) || (!uaa->iface)) {
ermsg = "device or iface";
goto nobulk;
}
sc->sc_iface = iface = uaa->iface;
sc->sc_opened = 0;
sc->sc_refcnt = 0;
r = usbd_endpoint_count(iface, &epcount);
if (r != USBD_NORMAL_COMPLETION) {
ermsg = "endpoints";
goto nobulk;
}
edesc = usbd_interface2endpoint_descriptor(iface, 0);
if (!edesc) {
ermsg = "interface endpoint";
goto nobulk;
}
sc->sc_epaddr = edesc->bEndpointAddress;
/* XXX no error trapping, no storing of struct cdev **/
(void) make_dev(&ufm_cdevsw, device_get_unit(self),
UID_ROOT, GID_OPERATOR,
0644, "ufm%d", device_get_unit(self));
DPRINTFN(10, ("ufm_attach: %p\n", sc->sc_udev));
return 0;
nobulk:
device_printf(sc->sc_dev, "could not find %s\n", ermsg);
return ENXIO;
}
int
ufmopen(struct cdev *dev, int flag, int mode, struct thread *td)
{
struct ufm_softc *sc;
int unit = UFMUNIT(dev);
sc = devclass_get_softc(ufm_devclass, unit);
if (sc == NULL)
return (ENXIO);
DPRINTFN(5, ("ufmopen: flag=%d, mode=%d, unit=%d\n",
flag, mode, unit));
if (sc->sc_opened)
return (EBUSY);
if ((flag & (FWRITE|FREAD)) != (FWRITE|FREAD))
return (EACCES);
sc->sc_opened = 1;
return (0);
}
int
ufmclose(struct cdev *dev, int flag, int mode, struct thread *td)
{
struct ufm_softc *sc;
int unit = UFMUNIT(dev);
sc = devclass_get_softc(ufm_devclass, unit);
DPRINTFN(5, ("ufmclose: flag=%d, mode=%d, unit=%d\n", flag, mode, unit));
sc->sc_opened = 0;
sc->sc_refcnt = 0;
return 0;
}
static int
ufm_do_req(struct ufm_softc *sc, u_int8_t reqtype, u_int8_t request,
u_int16_t value, u_int16_t index, u_int8_t len, void *retbuf)
{
int s;
usb_device_request_t req;
usbd_status err;
s = splusb();
req.bmRequestType = reqtype;
req.bRequest = request;
USETW(req.wValue, value);
USETW(req.wIndex, index);
USETW(req.wLength, len);
err = usbd_do_request_flags(sc->sc_udev, &req, retbuf, 0, NULL,
USBD_DEFAULT_TIMEOUT);
splx(s);
if (err)
return (EIO);
return (0);
}
static int
ufm_set_freq(struct ufm_softc *sc, caddr_t addr)
{
int freq = *(int *)addr;
u_int8_t ret;
/*
* Freq now is in Hz. We need to convert it to the frequency
* that the radio wants. This frequency is 10.7MHz above
* the actual frequency. We then need to convert to
* units of 12.5kHz. We add one to the IFM to make rounding
* easier.
*/
sc->sc_freq = freq;
freq = (freq + 10700001) / 12500;
/* This appears to set the frequency */
if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD_SET_FREQ, freq >> 8,
freq, 1, &ret) != 0)
return (EIO);
/* Not sure what this does */
if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x96, 0xb7, 1,
&ret) != 0)
return (EIO);
return (0);
}
static int
ufm_get_freq(struct ufm_softc *sc, caddr_t addr)
{
int *valp = (int *)addr;
*valp = sc->sc_freq;
return (0);
}
static int
ufm_start(struct ufm_softc *sc, caddr_t addr)
{
u_int8_t ret;
if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x00, 0xc7,
1, &ret))
return (EIO);
if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD2, 0x01, 0x00,
1, &ret))
return (EIO);
if (ret & 0x1)
return (EIO);
return (0);
}
static int
ufm_stop(struct ufm_softc *sc, caddr_t addr)
{
u_int8_t ret;
if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x16, 0x1C,
1, &ret))
return (EIO);
if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD2, 0x00, 0x00,
1, &ret))
return (EIO);
return (0);
}
static int
ufm_get_stat(struct ufm_softc *sc, caddr_t addr)
{
u_int8_t ret;
/*
* Note, there's a 240ms settle time before the status
* will be valid, so tsleep that amount. hz/4 is a good
* approximation of that. Since this is a short sleep
* we don't try to catch any signals to keep things
* simple.
*/
tsleep(sc, 0, "ufmwait", hz/4);
if (ufm_do_req(sc, UT_READ_VENDOR_DEVICE, FM_CMD0, 0x00, 0x24,
1, &ret))
return (EIO);
*(int *)addr = ret;
return (0);
}
int
ufmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
{
struct ufm_softc *sc;
int unit = UFMUNIT(dev);
int error = 0;
sc = devclass_get_softc(ufm_devclass, unit);
switch (cmd) {
case FM_SET_FREQ:
error = ufm_set_freq(sc, addr);
break;
case FM_GET_FREQ:
error = ufm_get_freq(sc, addr);
break;
case FM_START:
error = ufm_start(sc, addr);
break;
case FM_STOP:
error = ufm_stop(sc, addr);
break;
case FM_GET_STAT:
error = ufm_get_stat(sc, addr);
break;
default:
return ENOTTY;
break;
}
return error;
}
static int
ufm_detach(device_t self)
{
return 0;
}
MODULE_DEPEND(ufm, usb, 1, 1, 1);
DRIVER_MODULE(ufm, uhub, ufm_driver, ufm_devclass, usbd_driver_load, 0);