1 /* $OpenBSD: udsbr.c,v 1.26 2015/03/14 03:38:49 jsg 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) 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 usbd_status err; 133 134 DPRINTFN(10,("udsbr_attach: sc=%p\n", sc)); 135 136 err = usbd_set_config_no(dev, UDSBR_CONFIG_NO, 1); 137 if (err) { 138 printf("%s: setting config no failed\n", 139 sc->sc_dev.dv_xname); 140 return; 141 } 142 143 sc->sc_udev = dev; 144 145 DPRINTFN(10, ("udsbr_attach: %p\n", sc->sc_udev)); 146 147 sc->sc_child = radio_attach_mi(&udsbr_hw_if, sc, &sc->sc_dev); 148 } 149 150 int 151 udsbr_detach(struct device *self, int flags) 152 { 153 struct udsbr_softc *sc = (struct udsbr_softc *)self; 154 int rv = 0; 155 156 if (sc->sc_child != NULL) 157 rv = config_detach(sc->sc_child, flags); 158 159 return (rv); 160 } 161 162 int 163 udsbr_activate(struct device *self, int act) 164 { 165 struct udsbr_softc *sc = (struct udsbr_softc *)self; 166 int rv = 0; 167 168 switch (act) { 169 case DVACT_DEACTIVATE: 170 if (sc->sc_child != NULL) 171 rv = config_deactivate(sc->sc_child); 172 break; 173 } 174 return (rv); 175 } 176 177 int 178 udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index) 179 { 180 usb_device_request_t req; 181 usbd_status err; 182 u_char data; 183 184 DPRINTFN(1,("udsbr_req: ureq=0x%02x value=0x%04x index=0x%04x\n", 185 ureq, value, index)); 186 req.bmRequestType = UT_READ_VENDOR_DEVICE; 187 req.bRequest = ureq; 188 USETW(req.wValue, value); 189 USETW(req.wIndex, index); 190 USETW(req.wLength, 1); 191 err = usbd_do_request(sc->sc_udev, &req, &data); 192 if (err) { 193 printf("%s: request failed err=%d\n", sc->sc_dev.dv_xname, 194 err); 195 } 196 return !(data & 1); 197 } 198 199 void 200 udsbr_start(struct udsbr_softc *sc) 201 { 202 (void)udsbr_req(sc, 0x00, 0x0000, 0x00c7); 203 (void)udsbr_req(sc, 0x02, 0x0001, 0x0000); 204 } 205 206 void 207 udsbr_stop(struct udsbr_softc *sc) 208 { 209 (void)udsbr_req(sc, 0x00, 0x0016, 0x001c); 210 (void)udsbr_req(sc, 0x02, 0x0000, 0x0000); 211 } 212 213 void 214 udsbr_setfreq(struct udsbr_softc *sc, int freq) 215 { 216 DPRINTF(("udsbr_setfreq: setfreq=%d\n", freq)); 217 /* 218 * Freq now is in Hz. We need to convert it to the frequency 219 * that the radio wants. This frequency is 10.7MHz above 220 * the actual frequency. We then need to convert to 221 * units of 12.5kHz. We add one to the IFM to make rounding 222 * easier. 223 */ 224 freq = (freq * 1000 + 10700001) / 12500; 225 (void)udsbr_req(sc, 0x01, (freq >> 8) & 0xff, freq & 0xff); 226 (void)udsbr_req(sc, 0x00, 0x0096, 0x00b7); 227 usbd_delay_ms(sc->sc_udev, 240); /* wait for signal to settle */ 228 } 229 230 int 231 udsbr_status(struct udsbr_softc *sc) 232 { 233 return (udsbr_req(sc, 0x00, 0x0000, 0x0024)); 234 } 235 236 237 int 238 udsbr_get_info(void *v, struct radio_info *ri) 239 { 240 struct udsbr_softc *sc = v; 241 242 ri->mute = sc->sc_mute; 243 ri->volume = sc->sc_vol ? 255 : 0; 244 ri->caps = RADIO_CAPS_DETECT_STEREO; 245 ri->rfreq = 0; 246 ri->lock = 0; 247 ri->freq = sc->sc_freq; 248 ri->info = udsbr_status(sc) ? RADIO_INFO_STEREO : 0; 249 250 return (0); 251 } 252 253 int 254 udsbr_set_info(void *v, struct radio_info *ri) 255 { 256 struct udsbr_softc *sc = v; 257 258 sc->sc_mute = ri->mute != 0; 259 sc->sc_vol = ri->volume != 0; 260 sc->sc_freq = ri->freq; 261 udsbr_setfreq(sc, sc->sc_freq); 262 263 if (sc->sc_mute || sc->sc_vol == 0) 264 udsbr_stop(sc); 265 else 266 udsbr_start(sc); 267 268 return (0); 269 } 270