Annotation of sys/dev/isa/sf16fmr.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: sf16fmr.c,v 1.1 2002/04/25 04:56:59 mickey Exp $ */
2:
3: /*
4: * Copyright (c) 2002 Vladimir Popov <jumbo@narod.ru>
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: *
16: * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19: * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26: */
27:
28: /* SoundForte RadioLink SF16-FMR FM Radio Card device driver */
29:
30: #include <sys/param.h>
31: #include <sys/systm.h>
32: #include <sys/proc.h>
33: #include <sys/errno.h>
34: #include <sys/ioctl.h>
35: #include <sys/device.h>
36: #include <sys/radioio.h>
37:
38: #include <dev/isa/isavar.h>
39: #include <dev/radio_if.h>
40:
41: #include <dev/ic/tc921x.h>
42: #include <dev/ic/pt2254a.h>
43:
44: #define SF16FMR_BASE_VALID(x) (x == 0x384 || x == 0x284)
45:
46: #define SF16FMR_CAPABILITIES 0
47:
48: #define SF16FMR_FREQ_DATA 0
49: #define SF16FMR_FREQ_CLOCK 1
50: #define SF16FMR_FREQ_PERIOD 2
51:
52: #define SF16FMR_FREQ_STEADY (1 << SF16FMR_FREQ_DATA) | \
53: (1 << SF16FMR_FREQ_CLOCK) | \
54: (1 << SF16FMR_FREQ_PERIOD)
55:
56: #define SF16FMR_VOLU_STROBE_ON (1 << 3)
57: #define SF16FMR_VOLU_STROBE_OFF (0 << 3)
58: #define SF16FMR_VOLU_CLOCK_ON (1 << 4)
59: #define SF16FMR_VOLU_CLOCK_OFF (0 << 4)
60: #define SF16FMR_VOLU_DATA_ON (1 << 5)
61: #define SF16FMR_VOLU_DATA_OFF (0 << 5)
62:
63: int sfr_probe(struct device *, void *, void *);
64: void sfr_attach(struct device *, struct device * self, void *);
65:
66: int sfr_get_info(void *, struct radio_info *);
67: int sfr_set_info(void *, struct radio_info *);
68:
69: /* define our interface to the higher level radio driver */
70: struct radio_hw_if sfr_hw_if = {
71: NULL, /* open */
72: NULL, /* close */
73: sfr_get_info,
74: sfr_set_info,
75: NULL
76: };
77:
78: struct sfr_softc {
79: struct device sc_dev;
80:
81: u_int32_t freq;
82: u_int8_t vol;
83: int mute;
84:
85: struct tc921x_t c;
86: };
87:
88: struct cfattach sfr_ca = {
89: sizeof(struct sfr_softc), sfr_probe, sfr_attach
90: };
91:
92: struct cfdriver sfr_cd = {
93: NULL, "sfr", DV_DULL
94: };
95:
96: int sfr_find(bus_space_tag_t, bus_space_handle_t);
97: u_int32_t sfr_set_freq(struct tc921x_t *, u_int32_t);
98: u_int32_t sfr_get_freq(struct tc921x_t *);
99: u_int8_t sfr_set_vol(bus_space_tag_t, bus_space_handle_t, u_int8_t, int);
100: void sfr_send_volume(bus_space_tag_t, bus_space_handle_t, u_int32_t);
101:
102: int
103: sfr_probe(struct device *parent, void *match, void *aux)
104: {
105: struct isa_attach_args *ia = aux;
106: bus_space_tag_t iot = ia->ia_iot;
107: bus_space_handle_t ioh;
108: int iosize = 1, iobase = ia->ia_iobase;
109:
110: if (!SF16FMR_BASE_VALID(iobase)) {
111: printf("sfr: configured iobase 0x%x invalid\n", iobase);
112: return (0);
113: }
114:
115: if (bus_space_map(iot, iobase, iosize, 0, &ioh))
116: return (0);
117:
118: if (!sfr_find(iot, ioh)) {
119: bus_space_unmap(iot, ioh, iosize);
120: return (0);
121: }
122:
123: bus_space_unmap(iot, ioh, iosize);
124: ia->ia_iosize = iosize;
125: return (1);
126: }
127:
128: void
129: sfr_attach(struct device *parent, struct device *self, void *aux)
130: {
131: struct sfr_softc *sc = (void *) self;
132: struct isa_attach_args *ia = aux;
133:
134: sc->c.iot = ia->ia_iot;
135: sc->mute = 0;
136: sc->vol = 0;
137: sc->freq = MIN_FM_FREQ;
138: sc->c.period = SF16FMR_FREQ_PERIOD;
139: sc->c.clock = SF16FMR_FREQ_CLOCK;
140: sc->c.data = SF16FMR_FREQ_DATA;
141:
142: /* remap I/O */
143: if (bus_space_map(sc->c.iot, ia->ia_iobase, ia->ia_iosize,
144: 0, &sc->c.ioh)) {
145: printf(": bus_space_map() failed\n");
146: return;
147: }
148:
149: printf(": SoundForte RadioLink SF16-FMR\n");
150: sfr_set_freq(&sc->c, sc->freq);
151: sfr_set_vol(sc->c.iot, sc->c.ioh, sc->vol, sc->mute);
152:
153: radio_attach_mi(&sfr_hw_if, sc, &sc->sc_dev);
154: }
155:
156: int
157: sfr_find(bus_space_tag_t iot, bus_space_handle_t ioh)
158: {
159: struct sfr_softc sc;
160: u_int32_t freq;
161:
162: sc.c.iot = iot;
163: sc.c.ioh = ioh;
164: sc.c.offset = 0;
165: sc.c.period = SF16FMR_FREQ_PERIOD;
166: sc.c.clock = SF16FMR_FREQ_CLOCK;
167: sc.c.data = SF16FMR_FREQ_DATA;
168:
169: /*
170: * Let's try to write and read a frequency.
171: * If the written and read frequencies are
172: * the same then success.
173: */
174: sc.freq = MIN_FM_FREQ;
175: /* Initialize the tc921x chip */
176: sfr_set_freq(&sc.c, sc.freq);
177: /* Do actual frequency setting */
178: freq = sfr_set_freq(&sc.c, sc.freq);
179: if (sc.freq == freq)
180: return 1;
181:
182: return 0;
183: }
184:
185: int
186: sfr_get_info(void *v, struct radio_info *ri)
187: {
188: struct sfr_softc *sc = v;
189:
190: ri->mute = sc->mute;
191: ri->volume = sc->vol;
192: ri->caps = SF16FMR_CAPABILITIES;
193: ri->freq = sc->freq = sfr_get_freq(&sc->c);
194:
195: /* Not supported */
196: ri->stereo = 1; /* Always stereo */
197: ri->rfreq = 0;
198: ri->lock = 0;
199:
200: return (0);
201: }
202:
203: int
204: sfr_set_info(void *v, struct radio_info *ri)
205: {
206: struct sfr_softc *sc = v;
207:
208: sc->mute = ri->mute ? 1 : 0;
209: sc->vol = ri->volume;
210: sc->freq = sfr_set_freq(&sc->c, ri->freq);
211: sc->vol = sfr_set_vol(sc->c.iot, sc->c.ioh, sc->vol, sc->mute);
212:
213: return (0);
214: }
215:
216: u_int32_t
217: sfr_set_freq(struct tc921x_t *c, u_int32_t freq) {
218: u_int32_t data = 0ul;
219:
220: data |= tc921x_encode_freq(freq);
221: data |= TC921X_D0_REF_FREQ_10_KHZ;
222: data |= TC921X_D0_PULSE_SWALLOW_FM_MODE;
223: data |= TC921X_D0_OSC_7POINT2_MHZ;
224: data |= TC921X_D0_OUT_CONTROL_ON;
225: tc921x_write_addr(c, 0xD0, data);
226:
227: data = TC921X_D2_IO_PORT_OUTPUT(4);
228: tc921x_write_addr(c, 0xD2, data);
229:
230: return sfr_get_freq(c);
231: }
232:
233: u_int32_t
234: sfr_get_freq(struct tc921x_t *c) {
235: return tc921x_decode_freq(tc921x_read_addr(c, 0xD1));
236: }
237:
238: u_int8_t
239: sfr_set_vol(bus_space_tag_t iot, bus_space_handle_t ioh, u_int8_t vol, int mute) {
240: u_int32_t v;
241: u_int8_t ret;
242:
243: ret = mute ? 0 : vol;
244:
245: v = pt2254a_encode_volume(&ret, 255);
246:
247: sfr_send_volume(iot, ioh,
248: pt2254a_compose_register(v, v, USE_CHANNEL, USE_CHANNEL));
249:
250: return ret;
251: }
252:
253: void
254: sfr_send_volume(bus_space_tag_t iot, bus_space_handle_t ioh, u_int32_t vol) {
255: u_int8_t one, zero;
256: int i;
257:
258: one = zero = SF16FMR_FREQ_STEADY;
259: one = zero |= SF16FMR_VOLU_STROBE_OFF;
260:
261: one |= SF16FMR_VOLU_DATA_ON;
262: zero |= SF16FMR_VOLU_DATA_OFF;
263:
264: bus_space_write_1(iot, ioh, 0, SF16FMR_VOLU_STROBE_OFF | SF16FMR_FREQ_STEADY);
265:
266: for (i = 0; i < PT2254A_REGISTER_LENGTH; i++) {
267: if (vol & (1 << i)) {
268: bus_space_write_1(iot, ioh, 0,
269: one | SF16FMR_VOLU_CLOCK_OFF);
270: bus_space_write_1(iot, ioh, 0,
271: one | SF16FMR_VOLU_CLOCK_ON);
272: } else {
273: bus_space_write_1(iot, ioh, 0,
274: zero | SF16FMR_VOLU_CLOCK_OFF);
275: bus_space_write_1(iot, ioh, 0,
276: zero | SF16FMR_VOLU_CLOCK_ON);
277: }
278: }
279:
280: /* Latch the data */
281: bus_space_write_1(iot, ioh, 0, SF16FMR_VOLU_STROBE_ON | SF16FMR_FREQ_STEADY);
282: bus_space_write_1(iot, ioh, 0, SF16FMR_VOLU_STROBE_OFF | SF16FMR_FREQ_STEADY);
283: }
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