1 /* $NetBSD: udsbr.c,v 1.26 2016/12/04 10:12:35 skrll 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 1.26 2016/12/04 10:12:35 skrll Exp $"); 42 43 #ifdef _KERNEL_OPT 44 #include "opt_usb.h" 45 #endif 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <sys/device.h> 51 52 #include <sys/radioio.h> 53 #include <dev/radio_if.h> 54 55 #include <dev/usb/usb.h> 56 #include <dev/usb/usbdi.h> 57 #include <dev/usb/usbdi_util.h> 58 #include <dev/usb/usbdivar.h> 59 60 #include <dev/usb/usbdevs.h> 61 62 #ifdef UDSBR_DEBUG 63 #define DPRINTF(x) if (udsbrdebug) printf x 64 #define DPRINTFN(n,x) if (udsbrdebug>(n)) printf x 65 int udsbrdebug = 0; 66 #else 67 #define DPRINTF(x) 68 #define DPRINTFN(n,x) 69 #endif 70 71 #define UDSBR_CONFIG_NO 1 72 73 Static int udsbr_get_info(void *, struct radio_info *); 74 Static int udsbr_set_info(void *, struct radio_info *); 75 76 const struct radio_hw_if udsbr_hw_if = { 77 NULL, /* open */ 78 NULL, /* close */ 79 udsbr_get_info, 80 udsbr_set_info, 81 NULL 82 }; 83 84 struct udsbr_softc { 85 device_t sc_dev; 86 struct usbd_device * sc_udev; 87 88 char sc_mute; 89 char sc_vol; 90 uint32_t sc_freq; 91 92 device_t sc_child; 93 94 char sc_dying; 95 }; 96 97 Static int udsbr_req(struct udsbr_softc *, int, int, 98 int); 99 Static void udsbr_start(struct udsbr_softc *); 100 Static void udsbr_stop(struct udsbr_softc *); 101 Static void udsbr_setfreq(struct udsbr_softc *, int); 102 Static int udsbr_status(struct udsbr_softc *); 103 104 int udsbr_match(device_t, cfdata_t, void *); 105 void udsbr_attach(device_t, device_t, void *); 106 void udsbr_childdet(device_t, device_t); 107 int udsbr_detach(device_t, int); 108 int udsbr_activate(device_t, enum devact); 109 extern struct cfdriver udsbr_cd; 110 CFATTACH_DECL2_NEW(udsbr, sizeof(struct udsbr_softc), udsbr_match, 111 udsbr_attach, udsbr_detach, udsbr_activate, NULL, udsbr_childdet); 112 113 int 114 udsbr_match(device_t parent, cfdata_t match, void *aux) 115 { 116 struct usb_attach_arg *uaa = aux; 117 118 DPRINTFN(50,("udsbr_match\n")); 119 120 if (uaa->uaa_vendor != USB_VENDOR_CYPRESS || 121 uaa->uaa_product != USB_PRODUCT_CYPRESS_FMRADIO) 122 return UMATCH_NONE; 123 return UMATCH_VENDOR_PRODUCT; 124 } 125 126 void 127 udsbr_attach(device_t parent, device_t self, void *aux) 128 { 129 struct udsbr_softc *sc = device_private(self); 130 struct usb_attach_arg *uaa = aux; 131 struct usbd_device * dev = uaa->uaa_device; 132 char *devinfop; 133 usbd_status err; 134 135 DPRINTFN(10,("udsbr_attach: sc=%p\n", sc)); 136 137 sc->sc_dev = self; 138 139 aprint_naive("\n"); 140 aprint_normal("\n"); 141 142 devinfop = usbd_devinfo_alloc(dev, 0); 143 aprint_normal_dev(self, "%s\n", devinfop); 144 usbd_devinfo_free(devinfop); 145 146 err = usbd_set_config_no(dev, UDSBR_CONFIG_NO, 1); 147 if (err) { 148 aprint_error_dev(self, "failed to set configuration" 149 ", err=%s\n", usbd_errstr(err)); 150 return; 151 } 152 153 sc->sc_udev = dev; 154 155 DPRINTFN(10, ("udsbr_attach: %p\n", sc->sc_udev)); 156 157 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); 158 159 sc->sc_child = radio_attach_mi(&udsbr_hw_if, sc, sc->sc_dev); 160 161 return; 162 } 163 164 void 165 udsbr_childdet(device_t self, device_t child) 166 { 167 } 168 169 int 170 udsbr_detach(device_t self, int flags) 171 { 172 struct udsbr_softc *sc = device_private(self); 173 int rv = 0; 174 175 if (sc->sc_child != NULL) 176 rv = config_detach(sc->sc_child, flags); 177 178 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); 179 180 return rv; 181 } 182 183 int 184 udsbr_activate(device_t self, enum devact act) 185 { 186 struct udsbr_softc *sc = device_private(self); 187 188 switch (act) { 189 case DVACT_DEACTIVATE: 190 sc->sc_dying = 1; 191 return 0; 192 default: 193 return EOPNOTSUPP; 194 } 195 } 196 197 int 198 udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index) 199 { 200 usb_device_request_t req; 201 usbd_status err; 202 u_char data; 203 204 DPRINTFN(1,("udsbr_req: ureq=0x%02x value=0x%04x index=0x%04x\n", 205 ureq, value, index)); 206 req.bmRequestType = UT_READ_VENDOR_DEVICE; 207 req.bRequest = ureq; 208 USETW(req.wValue, value); 209 USETW(req.wIndex, index); 210 USETW(req.wLength, 1); 211 err = usbd_do_request(sc->sc_udev, &req, &data); 212 if (err) { 213 aprint_error_dev(sc->sc_dev, "request failed err=%d\n", err); 214 } 215 return !(data & 1); 216 } 217 218 void 219 udsbr_start(struct udsbr_softc *sc) 220 { 221 (void)udsbr_req(sc, 0x00, 0x0000, 0x00c7); 222 (void)udsbr_req(sc, 0x02, 0x0001, 0x0000); 223 } 224 225 void 226 udsbr_stop(struct udsbr_softc *sc) 227 { 228 (void)udsbr_req(sc, 0x00, 0x0016, 0x001c); 229 (void)udsbr_req(sc, 0x02, 0x0000, 0x0000); 230 } 231 232 void 233 udsbr_setfreq(struct udsbr_softc *sc, int freq) 234 { 235 DPRINTF(("udsbr_setfreq: setfreq=%d\n", freq)); 236 /* 237 * Freq now is in Hz. We need to convert it to the frequency 238 * that the radio wants. This frequency is 10.7MHz above 239 * the actual frequency. We then need to convert to 240 * units of 12.5kHz. We add one to the IFM to make rounding 241 * easier. 242 */ 243 freq = (freq * 1000 + 10700001) / 12500; 244 (void)udsbr_req(sc, 0x01, (freq >> 8) & 0xff, freq & 0xff); 245 (void)udsbr_req(sc, 0x00, 0x0096, 0x00b7); 246 usbd_delay_ms(sc->sc_udev, 240); /* wait for signal to settle */ 247 } 248 249 int 250 udsbr_status(struct udsbr_softc *sc) 251 { 252 return udsbr_req(sc, 0x00, 0x0000, 0x0024); 253 } 254 255 256 int 257 udsbr_get_info(void *v, struct radio_info *ri) 258 { 259 struct udsbr_softc *sc = v; 260 261 ri->mute = sc->sc_mute; 262 ri->volume = sc->sc_vol ? 255 : 0; 263 ri->caps = RADIO_CAPS_DETECT_STEREO; 264 ri->rfreq = 0; 265 ri->lock = 0; 266 ri->freq = sc->sc_freq; 267 ri->info = udsbr_status(sc) ? RADIO_INFO_STEREO : 0; 268 269 return 0; 270 } 271 272 int 273 udsbr_set_info(void *v, struct radio_info *ri) 274 { 275 struct udsbr_softc *sc = v; 276 277 sc->sc_mute = ri->mute != 0; 278 sc->sc_vol = ri->volume != 0; 279 sc->sc_freq = ri->freq; 280 udsbr_setfreq(sc, sc->sc_freq); 281 282 if (sc->sc_mute || sc->sc_vol == 0) 283 udsbr_stop(sc); 284 else 285 udsbr_start(sc); 286 287 return 0; 288 } 289