1 /* $OpenBSD: udsbr.c,v 1.28 2022/03/21 19:22:42 miod 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 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * Driver for the D-Link DSB-R100 FM radio.
35 * I apologize for the magic hex constants, but this is what happens
36 * when you have to reverse engineer the driver.
37 * Parts of the code borrowed from Linux and parts from Warner Losh's
38 * FreeBSD driver.
39 */
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/device.h>
44
45 #include <sys/radioio.h>
46 #include <dev/radio_if.h>
47
48 #include <dev/usb/usb.h>
49 #include <dev/usb/usbdi.h>
50 #include <dev/usb/usbdi_util.h>
51
52 #include <dev/usb/usbdevs.h>
53
54 #ifdef UDSBR_DEBUG
55 #define DPRINTF(x) do { if (udsbrdebug) printf x; } while (0)
56 #define DPRINTFN(n,x) do { if (udsbrdebug>(n)) printf x; } while (0)
57 int udsbrdebug = 0;
58 #else
59 #define DPRINTF(x)
60 #define DPRINTFN(n,x)
61 #endif
62
63 #define UDSBR_CONFIG_NO 1
64
65 int udsbr_get_info(void *, struct radio_info *);
66 int udsbr_set_info(void *, struct radio_info *);
67
68 const struct radio_hw_if udsbr_hw_if = {
69 NULL, /* open */
70 NULL, /* close */
71 udsbr_get_info,
72 udsbr_set_info,
73 NULL
74 };
75
76 struct udsbr_softc {
77 struct device sc_dev;
78 struct usbd_device *sc_udev;
79
80 char sc_mute;
81 char sc_vol;
82 u_int32_t sc_freq;
83
84 struct device *sc_child;
85 };
86
87 int udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index);
88 void udsbr_start(struct udsbr_softc *sc);
89 void udsbr_stop(struct udsbr_softc *sc);
90 void udsbr_setfreq(struct udsbr_softc *sc, int freq);
91 int udsbr_status(struct udsbr_softc *sc);
92
93 int udsbr_match(struct device *, void *, void *);
94 void udsbr_attach(struct device *, struct device *, void *);
95 int udsbr_detach(struct device *, int);
96 int udsbr_activate(struct device *, int);
97
98 struct cfdriver udsbr_cd = {
99 NULL, "udsbr", DV_DULL
100 };
101
102 const struct cfattach udsbr_ca = {
103 sizeof(struct udsbr_softc),
104 udsbr_match,
105 udsbr_attach,
106 udsbr_detach,
107 udsbr_activate,
108 };
109
110 int
udsbr_match(struct device * parent,void * match,void * aux)111 udsbr_match(struct device *parent, void *match, void *aux)
112 {
113 struct usb_attach_arg *uaa = aux;
114
115 DPRINTFN(50,("udsbr_match\n"));
116
117 if (uaa->iface == NULL || uaa->configno != UDSBR_CONFIG_NO)
118 return (UMATCH_NONE);
119
120 if (uaa->vendor != USB_VENDOR_CYPRESS ||
121 uaa->product != USB_PRODUCT_CYPRESS_FMRADIO)
122 return (UMATCH_NONE);
123 return (UMATCH_VENDOR_PRODUCT);
124 }
125
126 void
udsbr_attach(struct device * parent,struct device * self,void * aux)127 udsbr_attach(struct device *parent, struct device *self, void *aux)
128 {
129 struct udsbr_softc *sc = (struct udsbr_softc *)self;
130 struct usb_attach_arg *uaa = aux;
131 struct usbd_device *dev = uaa->device;
132
133 sc->sc_udev = dev;
134 sc->sc_child = radio_attach_mi(&udsbr_hw_if, sc, &sc->sc_dev);
135 }
136
137 int
udsbr_detach(struct device * self,int flags)138 udsbr_detach(struct device *self, int flags)
139 {
140 struct udsbr_softc *sc = (struct udsbr_softc *)self;
141 int rv = 0;
142
143 if (sc->sc_child != NULL)
144 rv = config_detach(sc->sc_child, flags);
145
146 return (rv);
147 }
148
149 int
udsbr_activate(struct device * self,int act)150 udsbr_activate(struct device *self, int act)
151 {
152 struct udsbr_softc *sc = (struct udsbr_softc *)self;
153 int rv = 0;
154
155 switch (act) {
156 case DVACT_DEACTIVATE:
157 if (sc->sc_child != NULL)
158 rv = config_deactivate(sc->sc_child);
159 break;
160 }
161 return (rv);
162 }
163
164 int
udsbr_req(struct udsbr_softc * sc,int ureq,int value,int index)165 udsbr_req(struct udsbr_softc *sc, int ureq, int value, int index)
166 {
167 usb_device_request_t req;
168 usbd_status err;
169 u_char data;
170
171 DPRINTFN(1,("udsbr_req: ureq=0x%02x value=0x%04x index=0x%04x\n",
172 ureq, value, index));
173 req.bmRequestType = UT_READ_VENDOR_DEVICE;
174 req.bRequest = ureq;
175 USETW(req.wValue, value);
176 USETW(req.wIndex, index);
177 USETW(req.wLength, 1);
178 err = usbd_do_request(sc->sc_udev, &req, &data);
179 if (err) {
180 printf("%s: request failed err=%d\n", sc->sc_dev.dv_xname,
181 err);
182 }
183 return !(data & 1);
184 }
185
186 void
udsbr_start(struct udsbr_softc * sc)187 udsbr_start(struct udsbr_softc *sc)
188 {
189 (void)udsbr_req(sc, 0x00, 0x0000, 0x00c7);
190 (void)udsbr_req(sc, 0x02, 0x0001, 0x0000);
191 }
192
193 void
udsbr_stop(struct udsbr_softc * sc)194 udsbr_stop(struct udsbr_softc *sc)
195 {
196 (void)udsbr_req(sc, 0x00, 0x0016, 0x001c);
197 (void)udsbr_req(sc, 0x02, 0x0000, 0x0000);
198 }
199
200 void
udsbr_setfreq(struct udsbr_softc * sc,int freq)201 udsbr_setfreq(struct udsbr_softc *sc, int freq)
202 {
203 DPRINTF(("udsbr_setfreq: setfreq=%d\n", freq));
204 /*
205 * Freq now is in Hz. We need to convert it to the frequency
206 * that the radio wants. This frequency is 10.7MHz above
207 * the actual frequency. We then need to convert to
208 * units of 12.5kHz. We add one to the IFM to make rounding
209 * easier.
210 */
211 freq = (freq * 1000 + 10700001) / 12500;
212 (void)udsbr_req(sc, 0x01, (freq >> 8) & 0xff, freq & 0xff);
213 (void)udsbr_req(sc, 0x00, 0x0096, 0x00b7);
214 usbd_delay_ms(sc->sc_udev, 240); /* wait for signal to settle */
215 }
216
217 int
udsbr_status(struct udsbr_softc * sc)218 udsbr_status(struct udsbr_softc *sc)
219 {
220 return (udsbr_req(sc, 0x00, 0x0000, 0x0024));
221 }
222
223
224 int
udsbr_get_info(void * v,struct radio_info * ri)225 udsbr_get_info(void *v, struct radio_info *ri)
226 {
227 struct udsbr_softc *sc = v;
228
229 ri->mute = sc->sc_mute;
230 ri->volume = sc->sc_vol ? 255 : 0;
231 ri->caps = RADIO_CAPS_DETECT_STEREO;
232 ri->rfreq = 0;
233 ri->lock = 0;
234 ri->freq = sc->sc_freq;
235 ri->info = udsbr_status(sc) ? RADIO_INFO_STEREO : 0;
236
237 return (0);
238 }
239
240 int
udsbr_set_info(void * v,struct radio_info * ri)241 udsbr_set_info(void *v, struct radio_info *ri)
242 {
243 struct udsbr_softc *sc = v;
244
245 sc->sc_mute = ri->mute != 0;
246 sc->sc_vol = ri->volume != 0;
247 sc->sc_freq = ri->freq;
248 udsbr_setfreq(sc, sc->sc_freq);
249
250 if (sc->sc_mute || sc->sc_vol == 0)
251 udsbr_stop(sc);
252 else
253 udsbr_start(sc);
254
255 return (0);
256 }
257