Annotation of sys/dev/usb/udsbr.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: udsbr.c,v 1.18 2007/06/14 10:11:15 mbalmer Exp $ */
! 2: /* $NetBSD: udsbr.c,v 1.7 2002/07/11 21:14:27 augustss Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 2002 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Lennart Augustsson (lennart@augustsson.net).
! 10: *
! 11: * Redistribution and use in source and binary forms, with or without
! 12: * modification, are permitted provided that the following conditions
! 13: * are met:
! 14: * 1. Redistributions of source code must retain the above copyright
! 15: * notice, this list of conditions and the following disclaimer.
! 16: * 2. Redistributions in binary form must reproduce the above copyright
! 17: * notice, this list of conditions and the following disclaimer in the
! 18: * documentation and/or other materials provided with the distribution.
! 19: * 3. All advertising materials mentioning features or use of this software
! 20: * must display the following acknowledgement:
! 21: * This product includes software developed by the NetBSD
! 22: * Foundation, Inc. and its contributors.
! 23: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 24: * contributors may be used to endorse or promote products derived
! 25: * from this software without specific prior written permission.
! 26: *
! 27: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 28: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 37: * POSSIBILITY OF SUCH DAMAGE.
! 38: */
! 39:
! 40: /*
! 41: * Driver for the D-Link DSB-R100 FM radio.
! 42: * I apologize for the magic hex constants, but this is what happens
! 43: * when you have to reverse engineer the driver.
! 44: * Parts of the code borrowed from Linux and parts from Warner Losh's
! 45: * FreeBSD driver.
! 46: */
! 47:
! 48: #include <sys/param.h>
! 49: #include <sys/systm.h>
! 50: #include <sys/kernel.h>
! 51: #include <sys/device.h>
! 52:
! 53: #include <sys/radioio.h>
! 54: #include <dev/radio_if.h>
! 55:
! 56: #include <dev/usb/usb.h>
! 57: #include <dev/usb/usbdi.h>
! 58: #include <dev/usb/usbdi_util.h>
! 59:
! 60: #include <dev/usb/usbdevs.h>
! 61:
! 62: #ifdef UDSBR_DEBUG
! 63: #define DPRINTF(x) do { if (udsbrdebug) printf x; } while (0)
! 64: #define DPRINTFN(n,x) do { if (udsbrdebug>(n)) printf x; } while (0)
! 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: int udsbr_get_info(void *, struct radio_info *);
! 74: int udsbr_set_info(void *, struct radio_info *);
! 75:
! 76: 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: struct device sc_dev;
! 86: usbd_device_handle sc_udev;
! 87:
! 88: char sc_mute;
! 89: char sc_vol;
! 90: u_int32_t sc_freq;
! 91:
! 92: struct device *sc_child;
! 93:
! 94: char sc_dying;
! 95: };
! 96:
! 97: int udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index);
! 98: void udsbr_start(struct udsbr_softc *sc);
! 99: void udsbr_stop(struct udsbr_softc *sc);
! 100: void udsbr_setfreq(struct udsbr_softc *sc, int freq);
! 101: int udsbr_status(struct udsbr_softc *sc);
! 102:
! 103: int udsbr_match(struct device *, void *, void *);
! 104: void udsbr_attach(struct device *, struct device *, void *);
! 105: int udsbr_detach(struct device *, int);
! 106: int udsbr_activate(struct device *, enum devact);
! 107:
! 108: struct cfdriver udsbr_cd = {
! 109: NULL, "udsbr", DV_DULL
! 110: };
! 111:
! 112: const struct cfattach udsbr_ca = {
! 113: sizeof(struct udsbr_softc),
! 114: udsbr_match,
! 115: udsbr_attach,
! 116: udsbr_detach,
! 117: udsbr_activate,
! 118: };
! 119:
! 120: int
! 121: udsbr_match(struct device *parent, void *match, void *aux)
! 122: {
! 123: struct usb_attach_arg *uaa = aux;
! 124:
! 125: DPRINTFN(50,("udsbr_match\n"));
! 126:
! 127: if (uaa->iface != NULL)
! 128: return (UMATCH_NONE);
! 129:
! 130: if (uaa->vendor != USB_VENDOR_CYPRESS ||
! 131: uaa->product != USB_PRODUCT_CYPRESS_FMRADIO)
! 132: return (UMATCH_NONE);
! 133: return (UMATCH_VENDOR_PRODUCT);
! 134: }
! 135:
! 136: void
! 137: udsbr_attach(struct device *parent, struct device *self, void *aux)
! 138: {
! 139: struct udsbr_softc *sc = (struct udsbr_softc *)self;
! 140: struct usb_attach_arg *uaa = aux;
! 141: usbd_device_handle dev = uaa->device;
! 142: char *devinfop;
! 143: usbd_status err;
! 144:
! 145: DPRINTFN(10,("udsbr_attach: sc=%p\n", sc));
! 146:
! 147: devinfop = usbd_devinfo_alloc(dev, 0);
! 148: printf("\n%s: %s\n", sc->sc_dev.dv_xname, devinfop);
! 149: usbd_devinfo_free(devinfop);
! 150:
! 151: err = usbd_set_config_no(dev, UDSBR_CONFIG_NO, 1);
! 152: if (err) {
! 153: printf("%s: setting config no failed\n",
! 154: sc->sc_dev.dv_xname);
! 155: return;
! 156: }
! 157:
! 158: sc->sc_udev = dev;
! 159:
! 160: DPRINTFN(10, ("udsbr_attach: %p\n", sc->sc_udev));
! 161:
! 162: usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev,
! 163: &sc->sc_dev);
! 164:
! 165: sc->sc_child = radio_attach_mi(&udsbr_hw_if, sc, &sc->sc_dev);
! 166: }
! 167:
! 168: int
! 169: udsbr_detach(struct device *self, int flags)
! 170: {
! 171: struct udsbr_softc *sc = (struct udsbr_softc *)self;
! 172: int rv = 0;
! 173:
! 174: if (sc->sc_child != NULL)
! 175: rv = config_detach(sc->sc_child, flags);
! 176:
! 177: usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev,
! 178: &sc->sc_dev);
! 179:
! 180: return (rv);
! 181: }
! 182:
! 183: int
! 184: udsbr_activate(struct device *self, enum devact act)
! 185: {
! 186: struct udsbr_softc *sc = (struct udsbr_softc *)self;
! 187: int rv = 0;
! 188:
! 189: switch (act) {
! 190: case DVACT_ACTIVATE:
! 191: break;
! 192:
! 193: case DVACT_DEACTIVATE:
! 194: sc->sc_dying = 1;
! 195: if (sc->sc_child != NULL)
! 196: rv = config_deactivate(sc->sc_child);
! 197: break;
! 198: }
! 199: return (rv);
! 200: }
! 201:
! 202: int
! 203: udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index)
! 204: {
! 205: usb_device_request_t req;
! 206: usbd_status err;
! 207: u_char data;
! 208:
! 209: DPRINTFN(1,("udsbr_req: ureq=0x%02x value=0x%04x index=0x%04x\n",
! 210: ureq, value, index));
! 211: req.bmRequestType = UT_READ_VENDOR_DEVICE;
! 212: req.bRequest = ureq;
! 213: USETW(req.wValue, value);
! 214: USETW(req.wIndex, index);
! 215: USETW(req.wLength, 1);
! 216: err = usbd_do_request(sc->sc_udev, &req, &data);
! 217: if (err) {
! 218: printf("%s: request failed err=%d\n", sc->sc_dev.dv_xname,
! 219: err);
! 220: }
! 221: return !(data & 1);
! 222: }
! 223:
! 224: void
! 225: udsbr_start(struct udsbr_softc *sc)
! 226: {
! 227: (void)udsbr_req(sc, 0x00, 0x0000, 0x00c7);
! 228: (void)udsbr_req(sc, 0x02, 0x0001, 0x0000);
! 229: }
! 230:
! 231: void
! 232: udsbr_stop(struct udsbr_softc *sc)
! 233: {
! 234: (void)udsbr_req(sc, 0x00, 0x0016, 0x001c);
! 235: (void)udsbr_req(sc, 0x02, 0x0000, 0x0000);
! 236: }
! 237:
! 238: void
! 239: udsbr_setfreq(struct udsbr_softc *sc, int freq)
! 240: {
! 241: DPRINTF(("udsbr_setfreq: setfreq=%d\n", freq));
! 242: /*
! 243: * Freq now is in Hz. We need to convert it to the frequency
! 244: * that the radio wants. This frequency is 10.7MHz above
! 245: * the actual frequency. We then need to convert to
! 246: * units of 12.5kHz. We add one to the IFM to make rounding
! 247: * easier.
! 248: */
! 249: freq = (freq * 1000 + 10700001) / 12500;
! 250: (void)udsbr_req(sc, 0x01, (freq >> 8) & 0xff, freq & 0xff);
! 251: (void)udsbr_req(sc, 0x00, 0x0096, 0x00b7);
! 252: usbd_delay_ms(sc->sc_udev, 240); /* wait for signal to settle */
! 253: }
! 254:
! 255: int
! 256: udsbr_status(struct udsbr_softc *sc)
! 257: {
! 258: return (udsbr_req(sc, 0x00, 0x0000, 0x0024));
! 259: }
! 260:
! 261:
! 262: int
! 263: udsbr_get_info(void *v, struct radio_info *ri)
! 264: {
! 265: struct udsbr_softc *sc = v;
! 266:
! 267: ri->mute = sc->sc_mute;
! 268: ri->volume = sc->sc_vol ? 255 : 0;
! 269: ri->caps = RADIO_CAPS_DETECT_STEREO;
! 270: ri->rfreq = 0;
! 271: ri->lock = 0;
! 272: ri->freq = sc->sc_freq;
! 273: ri->info = udsbr_status(sc) ? RADIO_INFO_STEREO : 0;
! 274:
! 275: return (0);
! 276: }
! 277:
! 278: int
! 279: udsbr_set_info(void *v, struct radio_info *ri)
! 280: {
! 281: struct udsbr_softc *sc = v;
! 282:
! 283: sc->sc_mute = ri->mute != 0;
! 284: sc->sc_vol = ri->volume != 0;
! 285: sc->sc_freq = ri->freq;
! 286: udsbr_setfreq(sc, sc->sc_freq);
! 287:
! 288: if (sc->sc_mute || sc->sc_vol == 0)
! 289: udsbr_stop(sc);
! 290: else
! 291: udsbr_start(sc);
! 292:
! 293: return (0);
! 294: }
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