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author | Michael Sevakis <jethead71@rockbox.org> | 2007-07-14 11:20:31 +0000 |
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committer | Michael Sevakis <jethead71@rockbox.org> | 2007-07-14 11:20:31 +0000 |
commit | 7d759f6b9ca96a4a64c71ac301eb59cb9702e74c (patch) | |
tree | fbaf5104716ccfed888c7d8506dbee15a881d4a2 /firmware/drivers/tuner/s1a0903x01.c | |
parent | b51a20fb9b1cc57b813d1c0b90ad8c010b9eab84 (diff) | |
download | rockbox-7d759f6b9ca96a4a64c71ac301eb59cb9702e74c.tar.gz rockbox-7d759f6b9ca96a4a64c71ac301eb59cb9702e74c.zip |
Do some planned radio interface cleanup since adding in the LV24020LP.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13880 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/drivers/tuner/s1a0903x01.c')
-rw-r--r-- | firmware/drivers/tuner/s1a0903x01.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/firmware/drivers/tuner/s1a0903x01.c b/firmware/drivers/tuner/s1a0903x01.c new file mode 100644 index 0000000000..cdeba2b3b4 --- /dev/null +++ b/firmware/drivers/tuner/s1a0903x01.c | |||
@@ -0,0 +1,172 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * Tuner "middleware" for Samsung S1A0903X01 chip | ||
10 | * | ||
11 | * Copyright (C) 2003 Linus Nielsen Feltzing | ||
12 | * | ||
13 | * All files in this archive are subject to the GNU General Public License. | ||
14 | * See the file COPYING in the source tree root for full license agreement. | ||
15 | * | ||
16 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
17 | * KIND, either express or implied. | ||
18 | * | ||
19 | ****************************************************************************/ | ||
20 | |||
21 | #include <stdbool.h> | ||
22 | #include <stdlib.h> | ||
23 | #include "config.h" | ||
24 | #include "kernel.h" | ||
25 | #include "tuner.h" /* tuner abstraction interface */ | ||
26 | #include "fmradio.h" /* physical interface driver */ | ||
27 | #include "mpeg.h" | ||
28 | #include "sound.h" | ||
29 | |||
30 | #define DEFAULT_IN1 0x100003 /* Mute */ | ||
31 | #define DEFAULT_IN2 0x140884 /* 5kHz, 7.2MHz crystal */ | ||
32 | #define PLL_FREQ_STEP 10000 | ||
33 | |||
34 | static int fm_in1; | ||
35 | static int fm_in2; | ||
36 | static int fm_present = -1; /* unknown */ | ||
37 | |||
38 | /* tuner abstraction layer: set something to the tuner */ | ||
39 | int s1a0903x01_set(int setting, int value) | ||
40 | { | ||
41 | int val = 1; | ||
42 | |||
43 | switch(setting) | ||
44 | { | ||
45 | case RADIO_SLEEP: | ||
46 | if (!value) | ||
47 | { /* wakeup: just unit */ | ||
48 | fm_in1 = DEFAULT_IN1; | ||
49 | fm_in2 = DEFAULT_IN2; | ||
50 | fmradio_set(1, fm_in1); | ||
51 | fmradio_set(2, fm_in2); | ||
52 | } | ||
53 | /* else we have no sleep mode? */ | ||
54 | break; | ||
55 | |||
56 | case RADIO_FREQUENCY: | ||
57 | { | ||
58 | int pll_cnt; | ||
59 | #if CONFIG_CODEC == MAS3587F | ||
60 | /* Shift the MAS internal clock away for certain frequencies to | ||
61 | * avoid interference. */ | ||
62 | int pitch = 1000; | ||
63 | |||
64 | /* 4th harmonic falls in the FM frequency range */ | ||
65 | int if_freq = 4 * mpeg_get_mas_pllfreq(); | ||
66 | |||
67 | /* shift the mas harmonic >= 300 kHz away using the direction | ||
68 | * which needs less shifting. */ | ||
69 | if (value < if_freq) | ||
70 | { | ||
71 | if (if_freq - value < 300000) | ||
72 | pitch = 1003 - (if_freq - value) / 100000; | ||
73 | } | ||
74 | else | ||
75 | { | ||
76 | if (value - if_freq < 300000) | ||
77 | pitch = 997 + (value - if_freq) / 100000; | ||
78 | } | ||
79 | sound_set_pitch(pitch); | ||
80 | #endif | ||
81 | /* We add the standard Intermediate Frequency 10.7MHz | ||
82 | ** before calculating the divisor | ||
83 | ** The reference frequency is set to 50kHz, and the VCO | ||
84 | ** output is prescaled by 2. | ||
85 | */ | ||
86 | |||
87 | pll_cnt = (value + 10700000) / (PLL_FREQ_STEP/2) / 2; | ||
88 | |||
89 | /* 0x100000 == FM mode | ||
90 | ** 0x000002 == Microprocessor controlled Mute | ||
91 | */ | ||
92 | fm_in1 = (fm_in1 & 0xfff00007) | (pll_cnt << 3); | ||
93 | fmradio_set(1, fm_in1); | ||
94 | break; | ||
95 | } | ||
96 | |||
97 | case RADIO_SCAN_FREQUENCY: | ||
98 | /* Tune in and delay */ | ||
99 | s1a0903x01_set(RADIO_FREQUENCY, value); | ||
100 | sleep(1); | ||
101 | /* Start IF measurement */ | ||
102 | fm_in1 |= 4; | ||
103 | fmradio_set(1, fm_in1); | ||
104 | sleep(1); | ||
105 | val = s1a0903x01_get(RADIO_TUNED); | ||
106 | break; | ||
107 | |||
108 | case RADIO_MUTE: | ||
109 | fm_in1 = (fm_in1 & 0xfffffffe) | (value?1:0); | ||
110 | fmradio_set(1, fm_in1); | ||
111 | break; | ||
112 | |||
113 | case RADIO_FORCE_MONO: | ||
114 | fm_in2 = (fm_in2 & 0xfffffffb) | (value?0:4); | ||
115 | fmradio_set(2, fm_in2); | ||
116 | break; | ||
117 | /* NOTE: These were only zeroed when starting the tuner from OFF | ||
118 | but the default values already set them to 0. */ | ||
119 | #if 0 | ||
120 | case S1A0903X01_IF_MEASUREMENT: | ||
121 | fm_in1 = (fm_in1 & 0xfffffffb) | (value?4:0); | ||
122 | fmradio_set(1, fm_in1); | ||
123 | break; | ||
124 | |||
125 | case S1A0903X01_SENSITIVITY: | ||
126 | fm_in2 = (fm_in2 & 0xffff9fff) | ((value & 3) << 13); | ||
127 | fmradio_set(2, fm_in2); | ||
128 | break; | ||
129 | #endif | ||
130 | default: | ||
131 | val = -1; | ||
132 | } | ||
133 | |||
134 | return val; | ||
135 | } | ||
136 | |||
137 | /* tuner abstraction layer: read something from the tuner */ | ||
138 | int s1a0903x01_get(int setting) | ||
139 | { | ||
140 | int val = -1; | ||
141 | switch(setting) | ||
142 | { | ||
143 | case RADIO_PRESENT: | ||
144 | if (fm_present == -1) | ||
145 | { | ||
146 | #ifdef HAVE_TUNER_PWR_CTRL | ||
147 | bool fmstatus = tuner_power(true); | ||
148 | #endif | ||
149 | /* 5kHz, 7.2MHz crystal, test mode 1 */ | ||
150 | fmradio_set(2, 0x140885); | ||
151 | fm_present = (fmradio_read(0) == 0x140885); | ||
152 | #ifdef HAVE_TUNER_PWR_CTRL | ||
153 | if (!fmstatus) | ||
154 | tuner_power(false); | ||
155 | #endif | ||
156 | } | ||
157 | |||
158 | val = fm_present; | ||
159 | break; | ||
160 | |||
161 | case RADIO_TUNED: | ||
162 | val = fmradio_read(3); | ||
163 | val = abs(10700 - ((val & 0x7ffff) / 8)) < 50; /* convert to kHz */ | ||
164 | break; | ||
165 | |||
166 | case RADIO_STEREO: | ||
167 | val = fmradio_read(3); | ||
168 | val = ((val & 0x100000) ? true : false); | ||
169 | break; | ||
170 | } | ||
171 | return val; | ||
172 | } | ||