/* $OpenBSD: udsbr.c,v 1.25 2013/11/07 12:06:25 pirofti 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 #include #include #include #include #include #include #include #include #include #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; struct usbd_device *sc_udev; char sc_mute; char sc_vol; u_int32_t sc_freq; struct device *sc_child; }; 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; struct usbd_device *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: 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); }