1 /* $NetBSD: udsbr.c,v 1.15 2008/05/24 16:40:58 cube 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 1.15 2008/05/24 16:40:58 cube 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 55 #include <dev/usb/usbdevs.h> 56 57 #ifdef UDSBR_DEBUG 58 #define DPRINTF(x) if (udsbrdebug) logprintf x 59 #define DPRINTFN(n,x) if (udsbrdebug>(n)) logprintf x 60 int udsbrdebug = 0; 61 #else 62 #define DPRINTF(x) 63 #define DPRINTFN(n,x) 64 #endif 65 66 #define UDSBR_CONFIG_NO 1 67 68 Static int udsbr_get_info(void *, struct radio_info *); 69 Static int udsbr_set_info(void *, struct radio_info *); 70 71 const struct radio_hw_if udsbr_hw_if = { 72 NULL, /* open */ 73 NULL, /* close */ 74 udsbr_get_info, 75 udsbr_set_info, 76 NULL 77 }; 78 79 struct udsbr_softc { 80 USBBASEDEVICE sc_dev; 81 usbd_device_handle sc_udev; 82 83 char sc_mute; 84 char sc_vol; 85 u_int32_t sc_freq; 86 87 device_t sc_child; 88 89 char sc_dying; 90 }; 91 92 Static int udsbr_req(struct udsbr_softc *sc, int ureq, int value, 93 int index); 94 Static void udsbr_start(struct udsbr_softc *sc); 95 Static void udsbr_stop(struct udsbr_softc *sc); 96 Static void udsbr_setfreq(struct udsbr_softc *sc, int freq); 97 Static int udsbr_status(struct udsbr_softc *sc); 98 99 int udsbr_match(device_t, cfdata_t, void *); 100 void udsbr_attach(device_t, device_t, void *); 101 void udsbr_childdet(device_t, device_t); 102 int udsbr_detach(device_t, int); 103 int udsbr_activate(device_t, enum devact); 104 extern struct cfdriver udsbr_cd; 105 CFATTACH_DECL2_NEW(udsbr, sizeof(struct udsbr_softc), udsbr_match, 106 udsbr_attach, udsbr_detach, udsbr_activate, NULL, udsbr_childdet); 107 108 USB_MATCH(udsbr) 109 { 110 USB_MATCH_START(udsbr, uaa); 111 112 DPRINTFN(50,("udsbr_match\n")); 113 114 if (uaa->vendor != USB_VENDOR_CYPRESS || 115 uaa->product != USB_PRODUCT_CYPRESS_FMRADIO) 116 return (UMATCH_NONE); 117 return (UMATCH_VENDOR_PRODUCT); 118 } 119 120 USB_ATTACH(udsbr) 121 { 122 USB_ATTACH_START(udsbr, sc, uaa); 123 usbd_device_handle dev = uaa->device; 124 char *devinfop; 125 usbd_status err; 126 127 DPRINTFN(10,("udsbr_attach: sc=%p\n", sc)); 128 129 sc->sc_dev = self; 130 131 devinfop = usbd_devinfo_alloc(dev, 0); 132 USB_ATTACH_SETUP; 133 aprint_normal_dev(self, "%s\n", devinfop); 134 usbd_devinfo_free(devinfop); 135 136 err = usbd_set_config_no(dev, UDSBR_CONFIG_NO, 1); 137 if (err) { 138 aprint_error_dev(self, "setting config no failed\n"); 139 USB_ATTACH_ERROR_RETURN; 140 } 141 142 sc->sc_udev = dev; 143 144 DPRINTFN(10, ("udsbr_attach: %p\n", sc->sc_udev)); 145 146 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, 147 USBDEV(sc->sc_dev)); 148 149 sc->sc_child = radio_attach_mi(&udsbr_hw_if, sc, USBDEV(sc->sc_dev)); 150 151 USB_ATTACH_SUCCESS_RETURN; 152 } 153 154 void 155 udsbr_childdet(device_t self, device_t child) 156 { 157 } 158 159 USB_DETACH(udsbr) 160 { 161 USB_DETACH_START(udsbr, sc); 162 int rv = 0; 163 164 if (sc->sc_child != NULL) 165 rv = config_detach(sc->sc_child, flags); 166 167 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, 168 USBDEV(sc->sc_dev)); 169 170 return (rv); 171 } 172 173 int 174 udsbr_activate(device_ptr_t self, enum devact act) 175 { 176 struct udsbr_softc *sc = device_private(self); 177 int rv = 0; 178 179 switch (act) { 180 case DVACT_ACTIVATE: 181 return (EOPNOTSUPP); 182 break; 183 184 case DVACT_DEACTIVATE: 185 sc->sc_dying = 1; 186 if (sc->sc_child != NULL) 187 rv = config_deactivate(sc->sc_child); 188 break; 189 } 190 return (rv); 191 } 192 193 int 194 udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index) 195 { 196 usb_device_request_t req; 197 usbd_status err; 198 u_char data; 199 200 DPRINTFN(1,("udsbr_req: ureq=0x%02x value=0x%04x index=0x%04x\n", 201 ureq, value, index)); 202 req.bmRequestType = UT_READ_VENDOR_DEVICE; 203 req.bRequest = ureq; 204 USETW(req.wValue, value); 205 USETW(req.wIndex, index); 206 USETW(req.wLength, 1); 207 err = usbd_do_request(sc->sc_udev, &req, &data); 208 if (err) { 209 aprint_error_dev(sc->sc_dev, "request failed err=%d\n", err); 210 } 211 return !(data & 1); 212 } 213 214 void 215 udsbr_start(struct udsbr_softc *sc) 216 { 217 (void)udsbr_req(sc, 0x00, 0x0000, 0x00c7); 218 (void)udsbr_req(sc, 0x02, 0x0001, 0x0000); 219 } 220 221 void 222 udsbr_stop(struct udsbr_softc *sc) 223 { 224 (void)udsbr_req(sc, 0x00, 0x0016, 0x001c); 225 (void)udsbr_req(sc, 0x02, 0x0000, 0x0000); 226 } 227 228 void 229 udsbr_setfreq(struct udsbr_softc *sc, int freq) 230 { 231 DPRINTF(("udsbr_setfreq: setfreq=%d\n", freq)); 232 /* 233 * Freq now is in Hz. We need to convert it to the frequency 234 * that the radio wants. This frequency is 10.7MHz above 235 * the actual frequency. We then need to convert to 236 * units of 12.5kHz. We add one to the IFM to make rounding 237 * easier. 238 */ 239 freq = (freq * 1000 + 10700001) / 12500; 240 (void)udsbr_req(sc, 0x01, (freq >> 8) & 0xff, freq & 0xff); 241 (void)udsbr_req(sc, 0x00, 0x0096, 0x00b7); 242 usbd_delay_ms(sc->sc_udev, 240); /* wait for signal to settle */ 243 } 244 245 int 246 udsbr_status(struct udsbr_softc *sc) 247 { 248 return (udsbr_req(sc, 0x00, 0x0000, 0x0024)); 249 } 250 251 252 int 253 udsbr_get_info(void *v, struct radio_info *ri) 254 { 255 struct udsbr_softc *sc = v; 256 257 ri->mute = sc->sc_mute; 258 ri->volume = sc->sc_vol ? 255 : 0; 259 ri->caps = RADIO_CAPS_DETECT_STEREO; 260 ri->rfreq = 0; 261 ri->lock = 0; 262 ri->freq = sc->sc_freq; 263 ri->info = udsbr_status(sc) ? RADIO_INFO_STEREO : 0; 264 265 return (0); 266 } 267 268 int 269 udsbr_set_info(void *v, struct radio_info *ri) 270 { 271 struct udsbr_softc *sc = v; 272 273 sc->sc_mute = ri->mute != 0; 274 sc->sc_vol = ri->volume != 0; 275 sc->sc_freq = ri->freq; 276 udsbr_setfreq(sc, sc->sc_freq); 277 278 if (sc->sc_mute || sc->sc_vol == 0) 279 udsbr_stop(sc); 280 else 281 udsbr_start(sc); 282 283 return (0); 284 } 285