1 /* $NetBSD: udsbr.c,v 1.32 2023/05/10 00:12:36 riastradh 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 (at) 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 1.32 2023/05/10 00:12:36 riastradh 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 static 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 static int udsbr_match(device_t, cfdata_t, void *); 105 static void udsbr_attach(device_t, device_t, void *); 106 static void udsbr_childdet(device_t, device_t); 107 static int udsbr_detach(device_t, int); 108 static int udsbr_activate(device_t, enum devact); 109 110 CFATTACH_DECL2_NEW(udsbr, sizeof(struct udsbr_softc), udsbr_match, 111 udsbr_attach, udsbr_detach, udsbr_activate, NULL, udsbr_childdet); 112 113 static 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 static 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 static void 165 udsbr_childdet(device_t self, device_t child) 166 { 167 } 168 169 static int 170 udsbr_detach(device_t self, int flags) 171 { 172 struct udsbr_softc *sc = device_private(self); 173 int error; 174 175 error = config_detach_children(self, flags); 176 if (error) 177 return error; 178 179 if (sc->sc_udev != NULL) 180 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, 181 sc->sc_dev); 182 183 return 0; 184 } 185 186 static int 187 udsbr_activate(device_t self, enum devact act) 188 { 189 struct udsbr_softc *sc = device_private(self); 190 191 switch (act) { 192 case DVACT_DEACTIVATE: 193 sc->sc_dying = 1; 194 return 0; 195 default: 196 return EOPNOTSUPP; 197 } 198 } 199 200 int 201 udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index) 202 { 203 usb_device_request_t req; 204 usbd_status err; 205 u_char data; 206 207 DPRINTFN(1,("udsbr_req: ureq=0x%02x value=0x%04x index=0x%04x\n", 208 ureq, value, index)); 209 req.bmRequestType = UT_READ_VENDOR_DEVICE; 210 req.bRequest = ureq; 211 USETW(req.wValue, value); 212 USETW(req.wIndex, index); 213 USETW(req.wLength, 1); 214 err = usbd_do_request(sc->sc_udev, &req, &data); 215 if (err) { 216 aprint_error_dev(sc->sc_dev, "request failed err=%d\n", err); 217 } 218 return !(data & 1); 219 } 220 221 void 222 udsbr_start(struct udsbr_softc *sc) 223 { 224 (void)udsbr_req(sc, 0x00, 0x0000, 0x00c7); 225 (void)udsbr_req(sc, 0x02, 0x0001, 0x0000); 226 } 227 228 void 229 udsbr_stop(struct udsbr_softc *sc) 230 { 231 (void)udsbr_req(sc, 0x00, 0x0016, 0x001c); 232 (void)udsbr_req(sc, 0x02, 0x0000, 0x0000); 233 } 234 235 void 236 udsbr_setfreq(struct udsbr_softc *sc, int freq) 237 { 238 DPRINTF(("udsbr_setfreq: setfreq=%d\n", freq)); 239 /* 240 * Freq now is in Hz. We need to convert it to the frequency 241 * that the radio wants. This frequency is 10.7MHz above 242 * the actual frequency. We then need to convert to 243 * units of 12.5kHz. We add one to the IFM to make rounding 244 * easier. 245 */ 246 freq = (freq * 1000 + 10700001) / 12500; 247 (void)udsbr_req(sc, 0x01, (freq >> 8) & 0xff, freq & 0xff); 248 (void)udsbr_req(sc, 0x00, 0x0096, 0x00b7); 249 usbd_delay_ms(sc->sc_udev, 240); /* wait for signal to settle */ 250 } 251 252 int 253 udsbr_status(struct udsbr_softc *sc) 254 { 255 return udsbr_req(sc, 0x00, 0x0000, 0x0024); 256 } 257 258 259 int 260 udsbr_get_info(void *v, struct radio_info *ri) 261 { 262 struct udsbr_softc *sc = v; 263 264 ri->mute = sc->sc_mute; 265 ri->volume = sc->sc_vol ? 255 : 0; 266 ri->caps = RADIO_CAPS_DETECT_STEREO; 267 ri->rfreq = 0; 268 ri->lock = 0; 269 ri->freq = sc->sc_freq; 270 ri->info = udsbr_status(sc) ? RADIO_INFO_STEREO : 0; 271 272 return 0; 273 } 274 275 int 276 udsbr_set_info(void *v, struct radio_info *ri) 277 { 278 struct udsbr_softc *sc = v; 279 280 sc->sc_mute = ri->mute != 0; 281 sc->sc_vol = ri->volume != 0; 282 sc->sc_freq = ri->freq; 283 udsbr_setfreq(sc, sc->sc_freq); 284 285 if (sc->sc_mute || sc->sc_vol == 0) 286 udsbr_stop(sc); 287 else 288 udsbr_start(sc); 289 290 return 0; 291 } 292
Indexes created Sun Oct 25 00:26:45 UTC 2026