1 /* $NetBSD: udsbr.c,v 1.21 2012/03/11 01:06:07 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (lennart@augustsson.net). 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Driver for the D-Link DSB-R100 FM radio. 34 * I apologize for the magic hex constants, but this is what happens 35 * when you have to reverse engineer the driver. 36 * Parts of the code borrowed from Linux and parts from Warner Losh's 37 * FreeBSD driver. 38 */ 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: udsbr.c,v 1.21 2012/03/11 01:06:07 mrg Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/device.h> 47 48 #include <sys/radioio.h> 49 #include <dev/radio_if.h> 50 51 #include <dev/usb/usb.h> 52 #include <dev/usb/usbdi.h> 53 #include <dev/usb/usbdi_util.h> 54 #include <dev/usb/usbdivar.h> 55 56 #include <dev/usb/usbdevs.h> 57 58 #ifdef UDSBR_DEBUG 59 #define DPRINTF(x) if (udsbrdebug) printf x 60 #define DPRINTFN(n,x) if (udsbrdebug>(n)) printf x 61 int udsbrdebug = 0; 62 #else 63 #define DPRINTF(x) 64 #define DPRINTFN(n,x) 65 #endif 66 67 #define UDSBR_CONFIG_NO 1 68 69 Static int udsbr_get_info(void *, struct radio_info *); 70 Static int udsbr_set_info(void *, struct radio_info *); 71 72 const struct radio_hw_if udsbr_hw_if = { 73 NULL, /* open */ 74 NULL, /* close */ 75 udsbr_get_info, 76 udsbr_set_info, 77 NULL 78 }; 79 80 struct udsbr_softc { 81 device_t sc_dev; 82 usbd_device_handle sc_udev; 83 84 char sc_mute; 85 char sc_vol; 86 u_int32_t sc_freq; 87 88 device_t sc_child; 89 90 char sc_dying; 91 }; 92 93 Static int udsbr_req(struct udsbr_softc *sc, int ureq, int value, 94 int index); 95 Static void udsbr_start(struct udsbr_softc *sc); 96 Static void udsbr_stop(struct udsbr_softc *sc); 97 Static void udsbr_setfreq(struct udsbr_softc *sc, int freq); 98 Static int udsbr_status(struct udsbr_softc *sc); 99 100 int udsbr_match(device_t, cfdata_t, void *); 101 void udsbr_attach(device_t, device_t, void *); 102 void udsbr_childdet(device_t, device_t); 103 int udsbr_detach(device_t, int); 104 int udsbr_activate(device_t, enum devact); 105 extern struct cfdriver udsbr_cd; 106 CFATTACH_DECL2_NEW(udsbr, sizeof(struct udsbr_softc), udsbr_match, 107 udsbr_attach, udsbr_detach, udsbr_activate, NULL, udsbr_childdet); 108 109 int 110 udsbr_match(device_t parent, cfdata_t match, void *aux) 111 { 112 struct usb_attach_arg *uaa = aux; 113 114 DPRINTFN(50,("udsbr_match\n")); 115 116 if (uaa->vendor != USB_VENDOR_CYPRESS || 117 uaa->product != USB_PRODUCT_CYPRESS_FMRADIO) 118 return (UMATCH_NONE); 119 return (UMATCH_VENDOR_PRODUCT); 120 } 121 122 void 123 udsbr_attach(device_t parent, device_t self, void *aux) 124 { 125 struct udsbr_softc *sc = device_private(self); 126 struct usb_attach_arg *uaa = aux; 127 usbd_device_handle dev = uaa->device; 128 char *devinfop; 129 usbd_status err; 130 131 DPRINTFN(10,("udsbr_attach: sc=%p\n", sc)); 132 133 sc->sc_dev = self; 134 135 aprint_naive("\n"); 136 aprint_normal("\n"); 137 138 devinfop = usbd_devinfo_alloc(dev, 0); 139 aprint_normal_dev(self, "%s\n", devinfop); 140 usbd_devinfo_free(devinfop); 141 142 err = usbd_set_config_no(dev, UDSBR_CONFIG_NO, 1); 143 if (err) { 144 aprint_error_dev(self, "setting config no failed\n"); 145 return; 146 } 147 148 sc->sc_udev = dev; 149 150 DPRINTFN(10, ("udsbr_attach: %p\n", sc->sc_udev)); 151 152 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, 153 sc->sc_dev); 154 155 sc->sc_child = radio_attach_mi(&udsbr_hw_if, sc, sc->sc_dev); 156 157 return; 158 } 159 160 void 161 udsbr_childdet(device_t self, device_t child) 162 { 163 } 164 165 int 166 udsbr_detach(device_t self, int flags) 167 { 168 struct udsbr_softc *sc = device_private(self); 169 int rv = 0; 170 171 if (sc->sc_child != NULL) 172 rv = config_detach(sc->sc_child, flags); 173 174 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, 175 sc->sc_dev); 176 177 return (rv); 178 } 179 180 int 181 udsbr_activate(device_t self, enum devact act) 182 { 183 struct udsbr_softc *sc = device_private(self); 184 185 switch (act) { 186 case DVACT_DEACTIVATE: 187 sc->sc_dying = 1; 188 return 0; 189 default: 190 return EOPNOTSUPP; 191 } 192 } 193 194 int 195 udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index) 196 { 197 usb_device_request_t req; 198 usbd_status err; 199 u_char data; 200 201 DPRINTFN(1,("udsbr_req: ureq=0x%02x value=0x%04x index=0x%04x\n", 202 ureq, value, index)); 203 req.bmRequestType = UT_READ_VENDOR_DEVICE; 204 req.bRequest = ureq; 205 USETW(req.wValue, value); 206 USETW(req.wIndex, index); 207 USETW(req.wLength, 1); 208 err = usbd_do_request(sc->sc_udev, &req, &data); 209 if (err) { 210 aprint_error_dev(sc->sc_dev, "request failed err=%d\n", err); 211 } 212 return !(data & 1); 213 } 214 215 void 216 udsbr_start(struct udsbr_softc *sc) 217 { 218 (void)udsbr_req(sc, 0x00, 0x0000, 0x00c7); 219 (void)udsbr_req(sc, 0x02, 0x0001, 0x0000); 220 } 221 222 void 223 udsbr_stop(struct udsbr_softc *sc) 224 { 225 (void)udsbr_req(sc, 0x00, 0x0016, 0x001c); 226 (void)udsbr_req(sc, 0x02, 0x0000, 0x0000); 227 } 228 229 void 230 udsbr_setfreq(struct udsbr_softc *sc, int freq) 231 { 232 DPRINTF(("udsbr_setfreq: setfreq=%d\n", freq)); 233 /* 234 * Freq now is in Hz. We need to convert it to the frequency 235 * that the radio wants. This frequency is 10.7MHz above 236 * the actual frequency. We then need to convert to 237 * units of 12.5kHz. We add one to the IFM to make rounding 238 * easier. 239 */ 240 freq = (freq * 1000 + 10700001) / 12500; 241 (void)udsbr_req(sc, 0x01, (freq >> 8) & 0xff, freq & 0xff); 242 (void)udsbr_req(sc, 0x00, 0x0096, 0x00b7); 243 usbd_delay_ms(sc->sc_udev, 240); /* wait for signal to settle */ 244 } 245 246 int 247 udsbr_status(struct udsbr_softc *sc) 248 { 249 return (udsbr_req(sc, 0x00, 0x0000, 0x0024)); 250 } 251 252 253 int 254 udsbr_get_info(void *v, struct radio_info *ri) 255 { 256 struct udsbr_softc *sc = v; 257 258 ri->mute = sc->sc_mute; 259 ri->volume = sc->sc_vol ? 255 : 0; 260 ri->caps = RADIO_CAPS_DETECT_STEREO; 261 ri->rfreq = 0; 262 ri->lock = 0; 263 ri->freq = sc->sc_freq; 264 ri->info = udsbr_status(sc) ? RADIO_INFO_STEREO : 0; 265 266 return (0); 267 } 268 269 int 270 udsbr_set_info(void *v, struct radio_info *ri) 271 { 272 struct udsbr_softc *sc = v; 273 274 sc->sc_mute = ri->mute != 0; 275 sc->sc_vol = ri->volume != 0; 276 sc->sc_freq = ri->freq; 277 udsbr_setfreq(sc, sc->sc_freq); 278 279 if (sc->sc_mute || sc->sc_vol == 0) 280 udsbr_stop(sc); 281 else 282 udsbr_start(sc); 283 284 return (0); 285 } 286