udsbr.c revision 1.17 
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
60int	udsbrdebug = 0;
61#else
62#define DPRINTF(x)
63#define DPRINTFN(n,x)
64#endif
65
66#define UDSBR_CONFIG_NO		1
67
68Static	int     udsbr_get_info(void *, struct radio_info *);
69Static	int     udsbr_set_info(void *, struct radio_info *);
70
71const 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
79struct 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
92Static	int	udsbr_req(struct udsbr_softc *sc, int ureq, int value,
93			  int index);
94Static	void	udsbr_start(struct udsbr_softc *sc);
95Static	void	udsbr_stop(struct udsbr_softc *sc);
96Static	void	udsbr_setfreq(struct udsbr_softc *sc, int freq);
97Static	int	udsbr_status(struct udsbr_softc *sc);
98
99int udsbr_match(device_t, cfdata_t, void *);
100void udsbr_attach(device_t, device_t, void *);
101void udsbr_childdet(device_t, device_t);
102int udsbr_detach(device_t, int);
103int udsbr_activate(device_t, enum devact);
104extern struct cfdriver udsbr_cd;
105CFATTACH_DECL2_NEW(udsbr, sizeof(struct udsbr_softc), udsbr_match,
106    udsbr_attach, udsbr_detach, udsbr_activate, NULL, udsbr_childdet);
107
108USB_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
120USB_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
156void
157udsbr_childdet(device_t self, device_t child)
158{
159}
160
161USB_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
175int
176udsbr_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
189int
190udsbr_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
210void
211udsbr_start(struct udsbr_softc *sc)
212{
213	(void)udsbr_req(sc, 0x00, 0x0000, 0x00c7);
214	(void)udsbr_req(sc, 0x02, 0x0001, 0x0000);
215}
216
217void
218udsbr_stop(struct udsbr_softc *sc)
219{
220	(void)udsbr_req(sc, 0x00, 0x0016, 0x001c);
221	(void)udsbr_req(sc, 0x02, 0x0000, 0x0000);
222}
223
224void
225udsbr_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
241int
242udsbr_status(struct udsbr_softc *sc)
243{
244	return (udsbr_req(sc, 0x00, 0x0000, 0x0024));
245}
246
247
248int
249udsbr_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
264int
265udsbr_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