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/* $OpenBSD: udsbr.c,v 1.23 2011/07/03 15:47:17 matthew Exp $ */
/* $NetBSD: udsbr.c,v 1.7 2002/07/11 21:14:27 augustss Exp $ */
/*
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Lennart Augustsson (lennart@augustsson.net).
*
* 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.
*/
/*
* Driver for the D-Link DSB-R100 FM radio.
* I apologize for the magic hex constants, but this is what happens
* when you have to reverse engineer the driver.
* Parts of the code borrowed from Linux and parts from Warner Losh's
* FreeBSD driver.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/radioio.h>
#include <dev/radio_if.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdevs.h>
#ifdef UDSBR_DEBUG
#define DPRINTF(x) do { if (udsbrdebug) printf x; } while (0)
#define DPRINTFN(n,x) do { if (udsbrdebug>(n)) printf x; } while (0)
int udsbrdebug = 0;
#else
#define DPRINTF(x)
#define DPRINTFN(n,x)
#endif
#define UDSBR_CONFIG_NO 1
int udsbr_get_info(void *, struct radio_info *);
int udsbr_set_info(void *, struct radio_info *);
struct radio_hw_if udsbr_hw_if = {
NULL, /* open */
NULL, /* close */
udsbr_get_info,
udsbr_set_info,
NULL
};
struct udsbr_softc {
struct device sc_dev;
usbd_device_handle sc_udev;
char sc_mute;
char sc_vol;
u_int32_t sc_freq;
struct device *sc_child;
char sc_dying;
};
int udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index);
void udsbr_start(struct udsbr_softc *sc);
void udsbr_stop(struct udsbr_softc *sc);
void udsbr_setfreq(struct udsbr_softc *sc, int freq);
int udsbr_status(struct udsbr_softc *sc);
int udsbr_match(struct device *, void *, void *);
void udsbr_attach(struct device *, struct device *, void *);
int udsbr_detach(struct device *, int);
int udsbr_activate(struct device *, int);
struct cfdriver udsbr_cd = {
NULL, "udsbr", DV_DULL
};
const struct cfattach udsbr_ca = {
sizeof(struct udsbr_softc),
udsbr_match,
udsbr_attach,
udsbr_detach,
udsbr_activate,
};
int
udsbr_match(struct device *parent, void *match, void *aux)
{
struct usb_attach_arg *uaa = aux;
DPRINTFN(50,("udsbr_match\n"));
if (uaa->iface != NULL)
return (UMATCH_NONE);
if (uaa->vendor != USB_VENDOR_CYPRESS ||
uaa->product != USB_PRODUCT_CYPRESS_FMRADIO)
return (UMATCH_NONE);
return (UMATCH_VENDOR_PRODUCT);
}
void
udsbr_attach(struct device *parent, struct device *self, void *aux)
{
struct udsbr_softc *sc = (struct udsbr_softc *)self;
struct usb_attach_arg *uaa = aux;
usbd_device_handle dev = uaa->device;
usbd_status err;
DPRINTFN(10,("udsbr_attach: sc=%p\n", sc));
err = usbd_set_config_no(dev, UDSBR_CONFIG_NO, 1);
if (err) {
printf("%s: setting config no failed\n",
sc->sc_dev.dv_xname);
return;
}
sc->sc_udev = dev;
DPRINTFN(10, ("udsbr_attach: %p\n", sc->sc_udev));
sc->sc_child = radio_attach_mi(&udsbr_hw_if, sc, &sc->sc_dev);
}
int
udsbr_detach(struct device *self, int flags)
{
struct udsbr_softc *sc = (struct udsbr_softc *)self;
int rv = 0;
if (sc->sc_child != NULL)
rv = config_detach(sc->sc_child, flags);
return (rv);
}
int
udsbr_activate(struct device *self, int act)
{
struct udsbr_softc *sc = (struct udsbr_softc *)self;
int rv = 0;
switch (act) {
case DVACT_DEACTIVATE:
sc->sc_dying = 1;
if (sc->sc_child != NULL)
rv = config_deactivate(sc->sc_child);
break;
}
return (rv);
}
int
udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index)
{
usb_device_request_t req;
usbd_status err;
u_char data;
DPRINTFN(1,("udsbr_req: ureq=0x%02x value=0x%04x index=0x%04x\n",
ureq, value, index));
req.bmRequestType = UT_READ_VENDOR_DEVICE;
req.bRequest = ureq;
USETW(req.wValue, value);
USETW(req.wIndex, index);
USETW(req.wLength, 1);
err = usbd_do_request(sc->sc_udev, &req, &data);
if (err) {
printf("%s: request failed err=%d\n", sc->sc_dev.dv_xname,
err);
}
return !(data & 1);
}
void
udsbr_start(struct udsbr_softc *sc)
{
(void)udsbr_req(sc, 0x00, 0x0000, 0x00c7);
(void)udsbr_req(sc, 0x02, 0x0001, 0x0000);
}
void
udsbr_stop(struct udsbr_softc *sc)
{
(void)udsbr_req(sc, 0x00, 0x0016, 0x001c);
(void)udsbr_req(sc, 0x02, 0x0000, 0x0000);
}
void
udsbr_setfreq(struct udsbr_softc *sc, int freq)
{
DPRINTF(("udsbr_setfreq: setfreq=%d\n", freq));
/*
* 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.
*/
freq = (freq * 1000 + 10700001) / 12500;
(void)udsbr_req(sc, 0x01, (freq >> 8) & 0xff, freq & 0xff);
(void)udsbr_req(sc, 0x00, 0x0096, 0x00b7);
usbd_delay_ms(sc->sc_udev, 240); /* wait for signal to settle */
}
int
udsbr_status(struct udsbr_softc *sc)
{
return (udsbr_req(sc, 0x00, 0x0000, 0x0024));
}
int
udsbr_get_info(void *v, struct radio_info *ri)
{
struct udsbr_softc *sc = v;
ri->mute = sc->sc_mute;
ri->volume = sc->sc_vol ? 255 : 0;
ri->caps = RADIO_CAPS_DETECT_STEREO;
ri->rfreq = 0;
ri->lock = 0;
ri->freq = sc->sc_freq;
ri->info = udsbr_status(sc) ? RADIO_INFO_STEREO : 0;
return (0);
}
int
udsbr_set_info(void *v, struct radio_info *ri)
{
struct udsbr_softc *sc = v;
sc->sc_mute = ri->mute != 0;
sc->sc_vol = ri->volume != 0;
sc->sc_freq = ri->freq;
udsbr_setfreq(sc, sc->sc_freq);
if (sc->sc_mute || sc->sc_vol == 0)
udsbr_stop(sc);
else
udsbr_start(sc);
return (0);
}
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