Annotation of sys/dev/usb/udsbr.c, Revision 1.1.1.1
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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