1 /* $NetBSD: udsbr.c,v 1.17 2009/11/12 19:51:44 dyoung 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 1.17 2009/11/12 19:51:44 dyoung 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 aprint_naive("\n"); 132 aprint_normal("\n"); 133 134 devinfop = usbd_devinfo_alloc(dev, 0); 135 aprint_normal_dev(self, "%s\n", devinfop); 136 usbd_devinfo_free(devinfop); 137 138 err = usbd_set_config_no(dev, UDSBR_CONFIG_NO, 1); 139 if (err) { 140 aprint_error_dev(self, "setting config no failed\n"); 141 USB_ATTACH_ERROR_RETURN; 142 } 143 144 sc->sc_udev = dev; 145 146 DPRINTFN(10, ("udsbr_attach: %p\n", sc->sc_udev)); 147 148 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, 149 USBDEV(sc->sc_dev)); 150 151 sc->sc_child = radio_attach_mi(&udsbr_hw_if, sc, USBDEV(sc->sc_dev)); 152 153 USB_ATTACH_SUCCESS_RETURN; 154 } 155 156 void 157 udsbr_childdet(device_t self, device_t child) 158 { 159 } 160 161 USB_DETACH(udsbr) 162 { 163 USB_DETACH_START(udsbr, sc); 164 int rv = 0; 165 166 if (sc->sc_child != NULL) 167 rv = config_detach(sc->sc_child, flags); 168 169 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, 170 USBDEV(sc->sc_dev)); 171 172 return (rv); 173 } 174 175 int 176 udsbr_activate(device_ptr_t self, enum devact act) 177 { 178 struct udsbr_softc *sc = device_private(self); 179 180 switch (act) { 181 case DVACT_DEACTIVATE: 182 sc->sc_dying = 1; 183 return 0; 184 default: 185 return EOPNOTSUPP; 186 } 187 } 188 189 int 190 udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index) 191 { 192 usb_device_request_t req; 193 usbd_status err; 194 u_char data; 195 196 DPRINTFN(1,("udsbr_req: ureq=0x%02x value=0x%04x index=0x%04x\n", 197 ureq, value, index)); 198 req.bmRequestType = UT_READ_VENDOR_DEVICE; 199 req.bRequest = ureq; 200 USETW(req.wValue, value); 201 USETW(req.wIndex, index); 202 USETW(req.wLength, 1); 203 err = usbd_do_request(sc->sc_udev, &req, &data); 204 if (err) { 205 aprint_error_dev(sc->sc_dev, "request failed err=%d\n", err); 206 } 207 return !(data & 1); 208 } 209 210 void 211 udsbr_start(struct udsbr_softc *sc) 212 { 213 (void)udsbr_req(sc, 0x00, 0x0000, 0x00c7); 214 (void)udsbr_req(sc, 0x02, 0x0001, 0x0000); 215 } 216 217 void 218 udsbr_stop(struct udsbr_softc *sc) 219 { 220 (void)udsbr_req(sc, 0x00, 0x0016, 0x001c); 221 (void)udsbr_req(sc, 0x02, 0x0000, 0x0000); 222 } 223 224 void 225 udsbr_setfreq(struct udsbr_softc *sc, int freq) 226 { 227 DPRINTF(("udsbr_setfreq: setfreq=%d\n", freq)); 228 /* 229 * Freq now is in Hz. We need to convert it to the frequency 230 * that the radio wants. This frequency is 10.7MHz above 231 * the actual frequency. We then need to convert to 232 * units of 12.5kHz. We add one to the IFM to make rounding 233 * easier. 234 */ 235 freq = (freq * 1000 + 10700001) / 12500; 236 (void)udsbr_req(sc, 0x01, (freq >> 8) & 0xff, freq & 0xff); 237 (void)udsbr_req(sc, 0x00, 0x0096, 0x00b7); 238 usbd_delay_ms(sc->sc_udev, 240); /* wait for signal to settle */ 239 } 240 241 int 242 udsbr_status(struct udsbr_softc *sc) 243 { 244 return (udsbr_req(sc, 0x00, 0x0000, 0x0024)); 245 } 246 247 248 int 249 udsbr_get_info(void *v, struct radio_info *ri) 250 { 251 struct udsbr_softc *sc = v; 252 253 ri->mute = sc->sc_mute; 254 ri->volume = sc->sc_vol ? 255 : 0; 255 ri->caps = RADIO_CAPS_DETECT_STEREO; 256 ri->rfreq = 0; 257 ri->lock = 0; 258 ri->freq = sc->sc_freq; 259 ri->info = udsbr_status(sc) ? RADIO_INFO_STEREO : 0; 260 261 return (0); 262 } 263 264 int 265 udsbr_set_info(void *v, struct radio_info *ri) 266 { 267 struct udsbr_softc *sc = v; 268 269 sc->sc_mute = ri->mute != 0; 270 sc->sc_vol = ri->volume != 0; 271 sc->sc_freq = ri->freq; 272 udsbr_setfreq(sc, sc->sc_freq); 273 274 if (sc->sc_mute || sc->sc_vol == 0) 275 udsbr_stop(sc); 276 else 277 udsbr_start(sc); 278 279 return (0); 280 } 281