Annotation of sys/dev/isa/radiotrack2.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: radiotrack2.c,v 1.3 2002/01/07 18:32:19 mickey Exp $ */
2: /* $RuOBSD: radiotrack2.c,v 1.2 2001/10/18 16:51:36 pva Exp $ */
3:
4: /*
5: * Copyright (c) 2001 Maxim Tsyplakov <tm@oganer.net>,
6: * Vladimir Popov <jumbo@narod.ru>
7: * All rights reserved.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
19: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21: * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
22: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28: */
29:
30: /* AIMS Lab Radiotrack II FM Radio Card device driver */
31:
32: /*
33: * Philips TEA5757H AM/FM Self Tuned Radio:
34: * http://www.semiconductors.philips.com/pip/TEA5757H
35: */
36:
37: #include <sys/param.h>
38: #include <sys/systm.h>
39: #include <sys/proc.h>
40: #include <sys/errno.h>
41: #include <sys/ioctl.h>
42: #include <sys/device.h>
43: #include <sys/radioio.h>
44:
45: #include <dev/isa/isavar.h>
46: #include <dev/radio_if.h>
47: #include <dev/ic/tea5757.h>
48:
49: #define RTII_BASE_VALID(x) ((x == 0x20C) || (x == 0x30C))
50: #define RTII_CAPABILITIES RADIO_CAPS_DETECT_STEREO | \
51: RADIO_CAPS_DETECT_SIGNAL | \
52: RADIO_CAPS_SET_MONO | \
53: RADIO_CAPS_LOCK_SENSITIVITY | \
54: RADIO_CAPS_HW_AFC | \
55: RADIO_CAPS_HW_SEARCH
56:
57: #if 0
58: #define RTII_SIGNAL (1 << 3)
59: #define RTII_STEREO (1 << 3)
60: #endif /* 0 */
61:
62: #define RTII_MUTE 0x01
63: #define RTII_UNMUTE 0x00
64:
65: #define RTII_RESET 0xC8
66:
67: #define RTII_DATA_ON (1 << 2)
68: #define RTII_DATA_OFF (0 << 2)
69:
70: #define RTII_CLCK_ON (1 << 1)
71: #define RTII_CLCK_OFF (0 << 1)
72:
73: #define RTII_WREN_ON (0 << 0)
74: #define RTII_WREN_OFF (1 << 0)
75:
76: #define RTII_READ_CLOCK_LOW (RTII_DATA_ON | RTII_CLCK_OFF | RTII_WREN_OFF)
77: #define RTII_READ_CLOCK_HIGH (RTII_DATA_ON | RTII_CLCK_ON | RTII_WREN_OFF)
78:
79: int rtii_probe(struct device *, void *, void *);
80: void rtii_attach(struct device *, struct device * self, void *);
81:
82: int rtii_get_info(void *, struct radio_info *);
83: int rtii_set_info(void *, struct radio_info *);
84: int rtii_search(void *, int);
85:
86: /* define our interface to the higher level radio driver */
87: struct radio_hw_if rtii_hw_if = {
88: NULL, /* open */
89: NULL, /* close */
90: rtii_get_info,
91: rtii_set_info,
92: rtii_search
93: };
94:
95: struct rtii_softc {
96: struct device dev;
97:
98: u_int32_t freq;
99: u_int32_t stereo;
100: u_int32_t lock;
101: u_int8_t vol;
102: int mute;
103:
104: struct tea5757_t tea;
105: };
106:
107: struct cfattach rtii_ca = {
108: sizeof(struct rtii_softc), rtii_probe, rtii_attach
109: };
110:
111: struct cfdriver rtii_cd = {
112: NULL, "rtii", DV_DULL
113: };
114:
115: void rtii_set_mute(struct rtii_softc *);
116: int rtii_find(bus_space_tag_t, bus_space_handle_t, int);
117:
118: u_int32_t rtii_hw_read(bus_space_tag_t, bus_space_handle_t, bus_size_t);
119:
120: void rtii_init(bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int32_t);
121: void rtii_rset(bus_space_tag_t, bus_space_handle_t, bus_size_t, u_int32_t);
122: void rtii_write_bit(bus_space_tag_t, bus_space_handle_t, bus_size_t, int);
123:
124: int
125: rtii_probe(struct device *parent, void *match, void *aux)
126: {
127: struct isa_attach_args *ia = aux;
128: bus_space_tag_t iot = ia->ia_iot;
129: bus_space_handle_t ioh;
130: struct cfdata *cf = match;
131: int iosize = 1, iobase = ia->ia_iobase;
132:
133: if (!RTII_BASE_VALID(iobase)) {
134: printf("rtii: configured iobase 0x%x invalid\n", iobase);
135: return (0);
136: }
137:
138: if (bus_space_map(iot, iobase, iosize, 0, &ioh))
139: return (0);
140:
141: if (!rtii_find(iot, ioh, cf->cf_flags)) {
142: bus_space_unmap(iot, ioh, iosize);
143: return (0);
144: }
145:
146: bus_space_unmap(iot, ioh, iosize);
147: ia->ia_iosize = iosize;
148: return (1);
149: }
150:
151: void
152: rtii_attach(struct device *parent, struct device *self, void *aux)
153: {
154: struct rtii_softc *sc = (void *) self;
155: struct isa_attach_args *ia = aux;
156: struct cfdata *cf = sc->dev.dv_cfdata;
157:
158: sc->tea.iot = ia->ia_iot;
159: sc->mute = 0;
160: sc->vol = 0;
161: sc->freq = MIN_FM_FREQ;
162: sc->stereo = TEA5757_STEREO;
163: sc->lock = TEA5757_S030;
164:
165: /* remap I/O */
166: if (bus_space_map(sc->tea.iot, ia->ia_iobase, ia->ia_iosize,
167: 0, &sc->tea.ioh)) {
168: printf(": bus_space_map() failed\n");
169: return;
170: }
171:
172: sc->tea.offset = 0;
173: sc->tea.flags = cf->cf_flags;
174:
175: sc->tea.init = rtii_init;
176: sc->tea.rset = rtii_rset;
177: sc->tea.write_bit = rtii_write_bit;
178: sc->tea.read = rtii_hw_read;
179:
180: printf(": AIMS Lab Radiotrack II\n");
181: tea5757_set_freq(&sc->tea, sc->stereo, sc->lock, sc->freq);
182: rtii_set_mute(sc);
183:
184: radio_attach_mi(&rtii_hw_if, sc, &sc->dev);
185: }
186:
187: /*
188: * Mute/unmute the card
189: */
190: void
191: rtii_set_mute(struct rtii_softc *sc)
192: {
193: u_int8_t mute;
194:
195: mute = (sc->mute || !sc->vol) ? RTII_MUTE : RTII_UNMUTE;
196: bus_space_write_1(sc->tea.iot, sc->tea.ioh, 0, mute);
197: DELAY(6);
198: bus_space_write_1(sc->tea.iot, sc->tea.ioh, 0, mute);
199: }
200:
201: void
202: rtii_init(bus_space_tag_t iot, bus_space_handle_t ioh, bus_size_t off, u_int32_t d)
203: {
204: bus_space_write_1(iot, ioh, off, RTII_RESET | RTII_WREN_OFF);
205: bus_space_write_1(iot, ioh, off, RTII_RESET | RTII_WREN_ON);
206: bus_space_write_1(iot, ioh, off, RTII_RESET | RTII_WREN_ON);
207: }
208:
209: void
210: rtii_rset(bus_space_tag_t iot, bus_space_handle_t ioh, bus_size_t off, u_int32_t d)
211: {
212: bus_space_write_1(iot, ioh, off, RTII_RESET | RTII_WREN_OFF);
213: }
214:
215: int
216: rtii_find(bus_space_tag_t iot, bus_space_handle_t ioh, int flags)
217: {
218: struct rtii_softc sc;
219: u_int32_t freq;
220:
221: sc.tea.iot = iot;
222: sc.tea.ioh = ioh;
223: sc.tea.offset = 0;
224: sc.tea.flags = flags;
225: sc.tea.init = rtii_init;
226: sc.tea.rset = rtii_rset;
227: sc.tea.write_bit = rtii_write_bit;
228: sc.tea.read = rtii_hw_read;
229: sc.lock = TEA5757_S030;
230: sc.stereo = TEA5757_STEREO;
231:
232: /*
233: * Let's try to write and read a frequency.
234: * If the written and read frequencies are
235: * the same then success.
236: */
237: sc.freq = MIN_FM_FREQ;
238: tea5757_set_freq(&sc.tea, sc.stereo, sc.lock, sc.freq);
239: rtii_set_mute(&sc);
240: freq = rtii_hw_read(iot, ioh, sc.tea.offset);
241: if (tea5757_decode_freq(freq, sc.tea.flags & TEA5757_TEA5759)
242: == sc.freq)
243: return 1;
244:
245: return 0;
246: }
247:
248: void
249: rtii_write_bit(bus_space_tag_t iot, bus_space_handle_t ioh, bus_size_t off, int bit)
250: {
251: u_int8_t data;
252:
253: data = bit ? RTII_DATA_ON : RTII_DATA_OFF;
254:
255: bus_space_write_1(iot, ioh, off, RTII_WREN_ON | RTII_CLCK_OFF | data);
256: bus_space_write_1(iot, ioh, off, RTII_WREN_ON | RTII_CLCK_ON | data);
257: bus_space_write_1(iot, ioh, off, RTII_WREN_ON | RTII_CLCK_OFF | data);
258: }
259:
260: u_int32_t
261: rtii_hw_read(bus_space_tag_t iot, bus_space_handle_t ioh, bus_size_t off)
262: {
263: u_int8_t i;
264: u_int32_t res = 0;
265:
266: bus_space_write_1(iot, ioh, off, RTII_READ_CLOCK_LOW);
267: DELAY(6);
268:
269: i = 24;
270: while ( i-- ) {
271: bus_space_write_1(iot, ioh, off, RTII_READ_CLOCK_HIGH);
272: DELAY(6);
273: bus_space_write_1(iot, ioh, off, RTII_READ_CLOCK_LOW);
274: res |= bus_space_read_1(iot, ioh, off) & RTII_DATA_ON ? 1 : 0;
275: DELAY(6);
276: res <<= 1;
277: }
278:
279: return (res & (TEA5757_DATA | TEA5757_FREQ)) >> 1;
280: }
281:
282: int
283: rtii_get_info(void *v, struct radio_info *ri)
284: {
285: struct rtii_softc *sc = v;
286:
287: ri->mute = sc->mute;
288: ri->volume = sc->vol ? 255 : 0;
289: ri->stereo = sc->stereo == TEA5757_STEREO ? 1 : 0;
290: ri->caps = RTII_CAPABILITIES;
291: ri->rfreq = 0;
292: ri->lock = tea5757_decode_lock(sc->lock);
293:
294: ri->freq = sc->freq = tea5757_decode_freq(rtii_hw_read(sc->tea.iot,
295: sc->tea.ioh, sc->tea.offset), sc->tea.flags & TEA5757_TEA5759);
296:
297: switch (bus_space_read_1(sc->tea.iot, sc->tea.ioh, 0)) {
298: case 0xFD:
299: ri->info = RADIO_INFO_SIGNAL | RADIO_INFO_STEREO;
300: break;
301: case 0xFF:
302: ri->info = 0;
303: break;
304: default:
305: ri->info = RADIO_INFO_SIGNAL;
306: }
307:
308: return (0);
309: }
310:
311: int
312: rtii_set_info(void *v, struct radio_info *ri)
313: {
314: struct rtii_softc *sc = v;
315:
316: sc->mute = ri->mute ? 1 : 0;
317: sc->vol = ri->volume ? 255 : 0;
318: sc->stereo = ri->stereo ? TEA5757_STEREO: TEA5757_MONO;
319: sc->lock = tea5757_encode_lock(ri->lock);
320: ri->freq = sc->freq = tea5757_set_freq(&sc->tea,
321: sc->lock, sc->stereo, ri->freq);
322: rtii_set_mute(sc);
323:
324: return (0);
325: }
326:
327: int
328: rtii_search(void *v, int f)
329: {
330: struct rtii_softc *sc = v;
331:
332: tea5757_search(&sc->tea, sc->lock, sc->stereo, f);
333: rtii_set_mute(sc);
334:
335: return (0);
336: }
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