1 /* $OpenBSD: udsbr.c,v 1.23 2011/07/03 15:47:17 matthew 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/kernel.h> 44 #include <sys/device.h> 45 46 #include <sys/radioio.h> 47 #include <dev/radio_if.h> 48 49 #include <dev/usb/usb.h> 50 #include <dev/usb/usbdi.h> 51 #include <dev/usb/usbdi_util.h> 52 53 #include <dev/usb/usbdevs.h> 54 55 #ifdef UDSBR_DEBUG 56 #define DPRINTF(x) do { if (udsbrdebug) printf x; } while (0) 57 #define DPRINTFN(n,x) do { if (udsbrdebug>(n)) printf x; } while (0) 58 int udsbrdebug = 0; 59 #else 60 #define DPRINTF(x) 61 #define DPRINTFN(n,x) 62 #endif 63 64 #define UDSBR_CONFIG_NO 1 65 66 int udsbr_get_info(void *, struct radio_info *); 67 int udsbr_set_info(void *, struct radio_info *); 68 69 struct radio_hw_if udsbr_hw_if = { 70 NULL, /* open */ 71 NULL, /* close */ 72 udsbr_get_info, 73 udsbr_set_info, 74 NULL 75 }; 76 77 struct udsbr_softc { 78 struct device sc_dev; 79 usbd_device_handle sc_udev; 80 81 char sc_mute; 82 char sc_vol; 83 u_int32_t sc_freq; 84 85 struct device *sc_child; 86 87 char sc_dying; 88 }; 89 90 int udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index); 91 void udsbr_start(struct udsbr_softc *sc); 92 void udsbr_stop(struct udsbr_softc *sc); 93 void udsbr_setfreq(struct udsbr_softc *sc, int freq); 94 int udsbr_status(struct udsbr_softc *sc); 95 96 int udsbr_match(struct device *, void *, void *); 97 void udsbr_attach(struct device *, struct device *, void *); 98 int udsbr_detach(struct device *, int); 99 int udsbr_activate(struct device *, int); 100 101 struct cfdriver udsbr_cd = { 102 NULL, "udsbr", DV_DULL 103 }; 104 105 const struct cfattach udsbr_ca = { 106 sizeof(struct udsbr_softc), 107 udsbr_match, 108 udsbr_attach, 109 udsbr_detach, 110 udsbr_activate, 111 }; 112 113 int 114 udsbr_match(struct device *parent, void *match, void *aux) 115 { 116 struct usb_attach_arg *uaa = aux; 117 118 DPRINTFN(50,("udsbr_match\n")); 119 120 if (uaa->iface != NULL) 121 return (UMATCH_NONE); 122 123 if (uaa->vendor != USB_VENDOR_CYPRESS || 124 uaa->product != USB_PRODUCT_CYPRESS_FMRADIO) 125 return (UMATCH_NONE); 126 return (UMATCH_VENDOR_PRODUCT); 127 } 128 129 void 130 udsbr_attach(struct device *parent, struct device *self, void *aux) 131 { 132 struct udsbr_softc *sc = (struct udsbr_softc *)self; 133 struct usb_attach_arg *uaa = aux; 134 usbd_device_handle dev = uaa->device; 135 usbd_status err; 136 137 DPRINTFN(10,("udsbr_attach: sc=%p\n", sc)); 138 139 err = usbd_set_config_no(dev, UDSBR_CONFIG_NO, 1); 140 if (err) { 141 printf("%s: setting config no failed\n", 142 sc->sc_dev.dv_xname); 143 return; 144 } 145 146 sc->sc_udev = dev; 147 148 DPRINTFN(10, ("udsbr_attach: %p\n", sc->sc_udev)); 149 150 sc->sc_child = radio_attach_mi(&udsbr_hw_if, sc, &sc->sc_dev); 151 } 152 153 int 154 udsbr_detach(struct device *self, int flags) 155 { 156 struct udsbr_softc *sc = (struct udsbr_softc *)self; 157 int rv = 0; 158 159 if (sc->sc_child != NULL) 160 rv = config_detach(sc->sc_child, flags); 161 162 return (rv); 163 } 164 165 int 166 udsbr_activate(struct device *self, int act) 167 { 168 struct udsbr_softc *sc = (struct udsbr_softc *)self; 169 int rv = 0; 170 171 switch (act) { 172 case DVACT_DEACTIVATE: 173 sc->sc_dying = 1; 174 if (sc->sc_child != NULL) 175 rv = config_deactivate(sc->sc_child); 176 break; 177 } 178 return (rv); 179 } 180 181 int 182 udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index) 183 { 184 usb_device_request_t req; 185 usbd_status err; 186 u_char data; 187 188 DPRINTFN(1,("udsbr_req: ureq=0x%02x value=0x%04x index=0x%04x\n", 189 ureq, value, index)); 190 req.bmRequestType = UT_READ_VENDOR_DEVICE; 191 req.bRequest = ureq; 192 USETW(req.wValue, value); 193 USETW(req.wIndex, index); 194 USETW(req.wLength, 1); 195 err = usbd_do_request(sc->sc_udev, &req, &data); 196 if (err) { 197 printf("%s: request failed err=%d\n", sc->sc_dev.dv_xname, 198 err); 199 } 200 return !(data & 1); 201 } 202 203 void 204 udsbr_start(struct udsbr_softc *sc) 205 { 206 (void)udsbr_req(sc, 0x00, 0x0000, 0x00c7); 207 (void)udsbr_req(sc, 0x02, 0x0001, 0x0000); 208 } 209 210 void 211 udsbr_stop(struct udsbr_softc *sc) 212 { 213 (void)udsbr_req(sc, 0x00, 0x0016, 0x001c); 214 (void)udsbr_req(sc, 0x02, 0x0000, 0x0000); 215 } 216 217 void 218 udsbr_setfreq(struct udsbr_softc *sc, int freq) 219 { 220 DPRINTF(("udsbr_setfreq: setfreq=%d\n", freq)); 221 /* 222 * Freq now is in Hz. We need to convert it to the frequency 223 * that the radio wants. This frequency is 10.7MHz above 224 * the actual frequency. We then need to convert to 225 * units of 12.5kHz. We add one to the IFM to make rounding 226 * easier. 227 */ 228 freq = (freq * 1000 + 10700001) / 12500; 229 (void)udsbr_req(sc, 0x01, (freq >> 8) & 0xff, freq & 0xff); 230 (void)udsbr_req(sc, 0x00, 0x0096, 0x00b7); 231 usbd_delay_ms(sc->sc_udev, 240); /* wait for signal to settle */ 232 } 233 234 int 235 udsbr_status(struct udsbr_softc *sc) 236 { 237 return (udsbr_req(sc, 0x00, 0x0000, 0x0024)); 238 } 239 240 241 int 242 udsbr_get_info(void *v, struct radio_info *ri) 243 { 244 struct udsbr_softc *sc = v; 245 246 ri->mute = sc->sc_mute; 247 ri->volume = sc->sc_vol ? 255 : 0; 248 ri->caps = RADIO_CAPS_DETECT_STEREO; 249 ri->rfreq = 0; 250 ri->lock = 0; 251 ri->freq = sc->sc_freq; 252 ri->info = udsbr_status(sc) ? RADIO_INFO_STEREO : 0; 253 254 return (0); 255 } 256 257 int 258 udsbr_set_info(void *v, struct radio_info *ri) 259 { 260 struct udsbr_softc *sc = v; 261 262 sc->sc_mute = ri->mute != 0; 263 sc->sc_vol = ri->volume != 0; 264 sc->sc_freq = ri->freq; 265 udsbr_setfreq(sc, sc->sc_freq); 266 267 if (sc->sc_mute || sc->sc_vol == 0) 268 udsbr_stop(sc); 269 else 270 udsbr_start(sc); 271 272 return (0); 273 } 274