1 /* $OpenBSD: udsbr.c,v 1.27 2016/11/06 12:58:01 mpi Exp $ */ 2 /* $NetBSD: udsbr.c,v 1.7 2002/07/11 21:14:27 augustss Exp $ */ 3 4 /* 5 * Copyright (c) 2002 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Lennart Augustsson (lennart@augustsson.net). 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Driver for the D-Link DSB-R100 FM radio. 35 * I apologize for the magic hex constants, but this is what happens 36 * when you have to reverse engineer the driver. 37 * Parts of the code borrowed from Linux and parts from Warner Losh's 38 * FreeBSD driver. 39 */ 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/device.h> 44 45 #include <sys/radioio.h> 46 #include <dev/radio_if.h> 47 48 #include <dev/usb/usb.h> 49 #include <dev/usb/usbdi.h> 50 #include <dev/usb/usbdi_util.h> 51 52 #include <dev/usb/usbdevs.h> 53 54 #ifdef UDSBR_DEBUG 55 #define DPRINTF(x) do { if (udsbrdebug) printf x; } while (0) 56 #define DPRINTFN(n,x) do { if (udsbrdebug>(n)) printf x; } while (0) 57 int udsbrdebug = 0; 58 #else 59 #define DPRINTF(x) 60 #define DPRINTFN(n,x) 61 #endif 62 63 #define UDSBR_CONFIG_NO 1 64 65 int udsbr_get_info(void *, struct radio_info *); 66 int udsbr_set_info(void *, struct radio_info *); 67 68 struct radio_hw_if udsbr_hw_if = { 69 NULL, /* open */ 70 NULL, /* close */ 71 udsbr_get_info, 72 udsbr_set_info, 73 NULL 74 }; 75 76 struct udsbr_softc { 77 struct device sc_dev; 78 struct usbd_device *sc_udev; 79 80 char sc_mute; 81 char sc_vol; 82 u_int32_t sc_freq; 83 84 struct device *sc_child; 85 }; 86 87 int udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index); 88 void udsbr_start(struct udsbr_softc *sc); 89 void udsbr_stop(struct udsbr_softc *sc); 90 void udsbr_setfreq(struct udsbr_softc *sc, int freq); 91 int udsbr_status(struct udsbr_softc *sc); 92 93 int udsbr_match(struct device *, void *, void *); 94 void udsbr_attach(struct device *, struct device *, void *); 95 int udsbr_detach(struct device *, int); 96 int udsbr_activate(struct device *, int); 97 98 struct cfdriver udsbr_cd = { 99 NULL, "udsbr", DV_DULL 100 }; 101 102 const struct cfattach udsbr_ca = { 103 sizeof(struct udsbr_softc), 104 udsbr_match, 105 udsbr_attach, 106 udsbr_detach, 107 udsbr_activate, 108 }; 109 110 int 111 udsbr_match(struct device *parent, void *match, void *aux) 112 { 113 struct usb_attach_arg *uaa = aux; 114 115 DPRINTFN(50,("udsbr_match\n")); 116 117 if (uaa->iface == NULL || uaa->configno != UDSBR_CONFIG_NO) 118 return (UMATCH_NONE); 119 120 if (uaa->vendor != USB_VENDOR_CYPRESS || 121 uaa->product != USB_PRODUCT_CYPRESS_FMRADIO) 122 return (UMATCH_NONE); 123 return (UMATCH_VENDOR_PRODUCT); 124 } 125 126 void 127 udsbr_attach(struct device *parent, struct device *self, void *aux) 128 { 129 struct udsbr_softc *sc = (struct udsbr_softc *)self; 130 struct usb_attach_arg *uaa = aux; 131 struct usbd_device *dev = uaa->device; 132 133 sc->sc_udev = dev; 134 sc->sc_child = radio_attach_mi(&udsbr_hw_if, sc, &sc->sc_dev); 135 } 136 137 int 138 udsbr_detach(struct device *self, int flags) 139 { 140 struct udsbr_softc *sc = (struct udsbr_softc *)self; 141 int rv = 0; 142 143 if (sc->sc_child != NULL) 144 rv = config_detach(sc->sc_child, flags); 145 146 return (rv); 147 } 148 149 int 150 udsbr_activate(struct device *self, int act) 151 { 152 struct udsbr_softc *sc = (struct udsbr_softc *)self; 153 int rv = 0; 154 155 switch (act) { 156 case DVACT_DEACTIVATE: 157 if (sc->sc_child != NULL) 158 rv = config_deactivate(sc->sc_child); 159 break; 160 } 161 return (rv); 162 } 163 164 int 165 udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index) 166 { 167 usb_device_request_t req; 168 usbd_status err; 169 u_char data; 170 171 DPRINTFN(1,("udsbr_req: ureq=0x%02x value=0x%04x index=0x%04x\n", 172 ureq, value, index)); 173 req.bmRequestType = UT_READ_VENDOR_DEVICE; 174 req.bRequest = ureq; 175 USETW(req.wValue, value); 176 USETW(req.wIndex, index); 177 USETW(req.wLength, 1); 178 err = usbd_do_request(sc->sc_udev, &req, &data); 179 if (err) { 180 printf("%s: request failed err=%d\n", sc->sc_dev.dv_xname, 181 err); 182 } 183 return !(data & 1); 184 } 185 186 void 187 udsbr_start(struct udsbr_softc *sc) 188 { 189 (void)udsbr_req(sc, 0x00, 0x0000, 0x00c7); 190 (void)udsbr_req(sc, 0x02, 0x0001, 0x0000); 191 } 192 193 void 194 udsbr_stop(struct udsbr_softc *sc) 195 { 196 (void)udsbr_req(sc, 0x00, 0x0016, 0x001c); 197 (void)udsbr_req(sc, 0x02, 0x0000, 0x0000); 198 } 199 200 void 201 udsbr_setfreq(struct udsbr_softc *sc, int freq) 202 { 203 DPRINTF(("udsbr_setfreq: setfreq=%d\n", freq)); 204 /* 205 * Freq now is in Hz. We need to convert it to the frequency 206 * that the radio wants. This frequency is 10.7MHz above 207 * the actual frequency. We then need to convert to 208 * units of 12.5kHz. We add one to the IFM to make rounding 209 * easier. 210 */ 211 freq = (freq * 1000 + 10700001) / 12500; 212 (void)udsbr_req(sc, 0x01, (freq >> 8) & 0xff, freq & 0xff); 213 (void)udsbr_req(sc, 0x00, 0x0096, 0x00b7); 214 usbd_delay_ms(sc->sc_udev, 240); /* wait for signal to settle */ 215 } 216 217 int 218 udsbr_status(struct udsbr_softc *sc) 219 { 220 return (udsbr_req(sc, 0x00, 0x0000, 0x0024)); 221 } 222 223 224 int 225 udsbr_get_info(void *v, struct radio_info *ri) 226 { 227 struct udsbr_softc *sc = v; 228 229 ri->mute = sc->sc_mute; 230 ri->volume = sc->sc_vol ? 255 : 0; 231 ri->caps = RADIO_CAPS_DETECT_STEREO; 232 ri->rfreq = 0; 233 ri->lock = 0; 234 ri->freq = sc->sc_freq; 235 ri->info = udsbr_status(sc) ? RADIO_INFO_STEREO : 0; 236 237 return (0); 238 } 239 240 int 241 udsbr_set_info(void *v, struct radio_info *ri) 242 { 243 struct udsbr_softc *sc = v; 244 245 sc->sc_mute = ri->mute != 0; 246 sc->sc_vol = ri->volume != 0; 247 sc->sc_freq = ri->freq; 248 udsbr_setfreq(sc, sc->sc_freq); 249 250 if (sc->sc_mute || sc->sc_vol == 0) 251 udsbr_stop(sc); 252 else 253 udsbr_start(sc); 254 255 return (0); 256 } 257