| 1 | /* $NetBSD: udsbr.c,v 1.24 2016/07/07 06:55:42 msaitoh 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 1.24 2016/07/07 06:55:42 msaitoh 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 | #include <dev/usb/usbdivar.h> |
| 55 | |
| 56 | #include <dev/usb/usbdevs.h> |
| 57 | |
| 58 | #ifdef UDSBR_DEBUG |
| 59 | #define DPRINTF(x) if (udsbrdebug) printf x |
| 60 | #define DPRINTFN(n,x) if (udsbrdebug>(n)) printf x |
| 61 | int udsbrdebug = 0; |
| 62 | #else |
| 63 | #define DPRINTF(x) |
| 64 | #define DPRINTFN(n,x) |
| 65 | #endif |
| 66 | |
| 67 | #define UDSBR_CONFIG_NO 1 |
| 68 | |
| 69 | Static int udsbr_get_info(void *, struct radio_info *); |
| 70 | Static int udsbr_set_info(void *, struct radio_info *); |
| 71 | |
| 72 | const struct radio_hw_if udsbr_hw_if = { |
| 73 | NULL, /* open */ |
| 74 | NULL, /* close */ |
| 75 | udsbr_get_info, |
| 76 | udsbr_set_info, |
| 77 | NULL |
| 78 | }; |
| 79 | |
| 80 | struct udsbr_softc { |
| 81 | device_t sc_dev; |
| 82 | struct usbd_device * sc_udev; |
| 83 | |
| 84 | char sc_mute; |
| 85 | char sc_vol; |
| 86 | uint32_t sc_freq; |
| 87 | |
| 88 | device_t sc_child; |
| 89 | |
| 90 | char sc_dying; |
| 91 | }; |
| 92 | |
| 93 | Static int udsbr_req(struct udsbr_softc *, int, int, |
| 94 | int); |
| 95 | Static void udsbr_start(struct udsbr_softc *); |
| 96 | Static void udsbr_stop(struct udsbr_softc *); |
| 97 | Static void udsbr_setfreq(struct udsbr_softc *, int); |
| 98 | Static int udsbr_status(struct udsbr_softc *); |
| 99 | |
| 100 | int udsbr_match(device_t, cfdata_t, void *); |
| 101 | void udsbr_attach(device_t, device_t, void *); |
| 102 | void udsbr_childdet(device_t, device_t); |
| 103 | int udsbr_detach(device_t, int); |
| 104 | int udsbr_activate(device_t, enum devact); |
| 105 | extern struct cfdriver udsbr_cd; |
| 106 | CFATTACH_DECL2_NEW(udsbr, sizeof(struct udsbr_softc), udsbr_match, |
| 107 | udsbr_attach, udsbr_detach, udsbr_activate, NULL, udsbr_childdet); |
| 108 | |
| 109 | int |
| 110 | udsbr_match(device_t parent, cfdata_t match, void *aux) |
| 111 | { |
| 112 | struct usb_attach_arg *uaa = aux; |
| 113 | |
| 114 | DPRINTFN(50,("udsbr_match\n" )); |
| 115 | |
| 116 | if (uaa->uaa_vendor != USB_VENDOR_CYPRESS || |
| 117 | uaa->uaa_product != USB_PRODUCT_CYPRESS_FMRADIO) |
| 118 | return UMATCH_NONE; |
| 119 | return UMATCH_VENDOR_PRODUCT; |
| 120 | } |
| 121 | |
| 122 | void |
| 123 | udsbr_attach(device_t parent, device_t self, void *aux) |
| 124 | { |
| 125 | struct udsbr_softc *sc = device_private(self); |
| 126 | struct usb_attach_arg *uaa = aux; |
| 127 | struct usbd_device * dev = uaa->uaa_device; |
| 128 | char *devinfop; |
| 129 | usbd_status err; |
| 130 | |
| 131 | DPRINTFN(10,("udsbr_attach: sc=%p\n" , sc)); |
| 132 | |
| 133 | sc->sc_dev = self; |
| 134 | |
| 135 | aprint_naive("\n" ); |
| 136 | aprint_normal("\n" ); |
| 137 | |
| 138 | devinfop = usbd_devinfo_alloc(dev, 0); |
| 139 | aprint_normal_dev(self, "%s\n" , devinfop); |
| 140 | usbd_devinfo_free(devinfop); |
| 141 | |
| 142 | err = usbd_set_config_no(dev, UDSBR_CONFIG_NO, 1); |
| 143 | if (err) { |
| 144 | aprint_error_dev(self, "failed to set configuration" |
| 145 | ", err=%s\n" , usbd_errstr(err)); |
| 146 | return; |
| 147 | } |
| 148 | |
| 149 | sc->sc_udev = dev; |
| 150 | |
| 151 | DPRINTFN(10, ("udsbr_attach: %p\n" , sc->sc_udev)); |
| 152 | |
| 153 | usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); |
| 154 | |
| 155 | sc->sc_child = radio_attach_mi(&udsbr_hw_if, sc, sc->sc_dev); |
| 156 | |
| 157 | return; |
| 158 | } |
| 159 | |
| 160 | void |
| 161 | udsbr_childdet(device_t self, device_t child) |
| 162 | { |
| 163 | } |
| 164 | |
| 165 | int |
| 166 | udsbr_detach(device_t self, int flags) |
| 167 | { |
| 168 | struct udsbr_softc *sc = device_private(self); |
| 169 | int rv = 0; |
| 170 | |
| 171 | if (sc->sc_child != NULL) |
| 172 | rv = config_detach(sc->sc_child, flags); |
| 173 | |
| 174 | usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); |
| 175 | |
| 176 | return rv; |
| 177 | } |
| 178 | |
| 179 | int |
| 180 | udsbr_activate(device_t self, enum devact act) |
| 181 | { |
| 182 | struct udsbr_softc *sc = device_private(self); |
| 183 | |
| 184 | switch (act) { |
| 185 | case DVACT_DEACTIVATE: |
| 186 | sc->sc_dying = 1; |
| 187 | return 0; |
| 188 | default: |
| 189 | return EOPNOTSUPP; |
| 190 | } |
| 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 | |