diff options
author | Bertrik Sikken <bertrik@sikken.nl> | 2008-10-26 13:28:52 +0000 |
---|---|---|
committer | Bertrik Sikken <bertrik@sikken.nl> | 2008-10-26 13:28:52 +0000 |
commit | 95726a5c239d37a453efa7fe4e2f7cfdb96f536b (patch) | |
tree | 35f2a66a2ea58ddb1fff97a51018c26cbeefbb51 /firmware | |
parent | 92683778f615a5ff079fec12ea256643c669194a (diff) | |
download | rockbox-95726a5c239d37a453efa7fe4e2f7cfdb96f536b.tar.gz rockbox-95726a5c239d37a453efa7fe4e2f7cfdb96f536b.zip |
FS#9503 - Sansa v2 audio/PMU communication driver (for the AS3525 SoC)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18886 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware')
-rw-r--r-- | firmware/SOURCES | 3 | ||||
-rw-r--r-- | firmware/target/arm/as3525/as3525-codec.c | 132 | ||||
-rw-r--r-- | firmware/target/arm/as3525/as3525-codec.h | 27 |
3 files changed, 162 insertions, 0 deletions
diff --git a/firmware/SOURCES b/firmware/SOURCES index 4407b0e8b9..7a93d058b4 100644 --- a/firmware/SOURCES +++ b/firmware/SOURCES | |||
@@ -1038,6 +1038,7 @@ target/arm/pcm-telechips.c | |||
1038 | #ifndef SIMULATOR | 1038 | #ifndef SIMULATOR |
1039 | target/arm/as3525/sansa-clip/lcd-ssd1303.c | 1039 | target/arm/as3525/sansa-clip/lcd-ssd1303.c |
1040 | target/arm/as3525/sansa-clip/button-clip.c | 1040 | target/arm/as3525/sansa-clip/button-clip.c |
1041 | target/arm/as3525/as3525-codec.c | ||
1041 | #endif /* !SIMULATOR */ | 1042 | #endif /* !SIMULATOR */ |
1042 | #endif /* SANSA_CLIP */ | 1043 | #endif /* SANSA_CLIP */ |
1043 | 1044 | ||
@@ -1045,6 +1046,7 @@ target/arm/as3525/sansa-clip/button-clip.c | |||
1045 | #ifndef SIMULATOR | 1046 | #ifndef SIMULATOR |
1046 | target/arm/as3525/sansa-e200v2/lcd-e200v2.c | 1047 | target/arm/as3525/sansa-e200v2/lcd-e200v2.c |
1047 | target/arm/as3525/sansa-e200v2/button-e200v2.c | 1048 | target/arm/as3525/sansa-e200v2/button-e200v2.c |
1049 | target/arm/as3525/as3525-codec.c | ||
1048 | #endif /* !SIMULATOR */ | 1050 | #endif /* !SIMULATOR */ |
1049 | #endif /* SANSA_E200V2 */ | 1051 | #endif /* SANSA_E200V2 */ |
1050 | 1052 | ||
@@ -1052,6 +1054,7 @@ target/arm/as3525/sansa-e200v2/button-e200v2.c | |||
1052 | #ifndef SIMULATOR | 1054 | #ifndef SIMULATOR |
1053 | target/arm/lcd-ssd1815.c | 1055 | target/arm/lcd-ssd1815.c |
1054 | target/arm/as3525/sansa-m200v2/button-m200v2.c | 1056 | target/arm/as3525/sansa-m200v2/button-m200v2.c |
1057 | target/arm/as3525/as3525-codec.c | ||
1055 | #endif /* !SIMULATOR */ | 1058 | #endif /* !SIMULATOR */ |
1056 | #endif /* SANSA_M200V2 */ | 1059 | #endif /* SANSA_M200V2 */ |
1057 | 1060 | ||
diff --git a/firmware/target/arm/as3525/as3525-codec.c b/firmware/target/arm/as3525/as3525-codec.c new file mode 100644 index 0000000000..1de2f49e1a --- /dev/null +++ b/firmware/target/arm/as3525/as3525-codec.c | |||
@@ -0,0 +1,132 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id: $ | ||
9 | * | ||
10 | * Copyright (C) 2008 by Bertrik Sikken | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | /* | ||
23 | Provides access to the codec/charger/rtc/adc part of the as3525. | ||
24 | This part is on address 0x46 of the internal i2c bus in the as3525. | ||
25 | Registers in the codec part seem to be nearly identical to the registers | ||
26 | in the AS3514 (used in the "v1" versions of the sansa c200 and e200). | ||
27 | |||
28 | I2C register description: | ||
29 | * I2C2_CNTRL needs to be set to 0x51 for transfers to work at all. | ||
30 | bit 1 indicates direction of transfer (0 = write, 1 = read) | ||
31 | * I2C2_SR (status register) indicates in bit 0 if a transfer is busy. | ||
32 | * I2C2_SLAD0 contains the i2c slave address to read from / write to. | ||
33 | * I2C2_CPSR0/1 is the divider from the peripheral clock to the i2c clock. | ||
34 | * I2C2_DACNT sets the number of bytes to transfer and actually starts it. | ||
35 | |||
36 | When a transfer is attempted to a non-existing i2c slave address, | ||
37 | interrupt bit 7 is raised and DACNT is not decremented after the transfer. | ||
38 | */ | ||
39 | |||
40 | #include "as3525-codec.h" | ||
41 | #include "as3525.h" | ||
42 | |||
43 | #define AUDIO_I2C_ADDR 0x46 | ||
44 | |||
45 | #define I2C2_DATA *((volatile unsigned int *)(I2C_AUDIO_BASE + 0x00)) | ||
46 | #define I2C2_SLAD0 *((volatile unsigned int *)(I2C_AUDIO_BASE + 0x04)) | ||
47 | #define I2C2_CNTRL *((volatile unsigned int *)(I2C_AUDIO_BASE + 0x0C)) | ||
48 | #define I2C2_DACNT *((volatile unsigned int *)(I2C_AUDIO_BASE + 0x10)) | ||
49 | #define I2C2_CPSR0 *((volatile unsigned int *)(I2C_AUDIO_BASE + 0x1C)) | ||
50 | #define I2C2_CPSR1 *((volatile unsigned int *)(I2C_AUDIO_BASE + 0x20)) | ||
51 | #define I2C2_IMR *((volatile unsigned int *)(I2C_AUDIO_BASE + 0x24)) | ||
52 | #define I2C2_RIS *((volatile unsigned int *)(I2C_AUDIO_BASE + 0x28)) | ||
53 | #define I2C2_MIS *((volatile unsigned int *)(I2C_AUDIO_BASE + 0x2C)) | ||
54 | #define I2C2_SR *((volatile unsigned int *)(I2C_AUDIO_BASE + 0x30)) | ||
55 | #define I2C2_INT_CLR *((volatile unsigned int *)(I2C_AUDIO_BASE + 0x40)) | ||
56 | #define I2C2_SADDR *((volatile unsigned int *)(I2C_AUDIO_BASE + 0x44)) | ||
57 | |||
58 | |||
59 | /* initialises the internal i2c bus and prepares for transfers to the codec */ | ||
60 | void as3525_codec_init(void) | ||
61 | { | ||
62 | /* reset device */ | ||
63 | CCU_SRC = CCU_SRC_I2C_AUDIO_EN; | ||
64 | CCU_SRL = CCU_SRL_MAGIC_NUMBER; | ||
65 | CCU_SRL = 0; | ||
66 | |||
67 | /* enable clock */ | ||
68 | CGU_PERI |= CGU_I2C_AUDIO_MASTER_CLOCK_ENABLE; | ||
69 | |||
70 | /* prescaler for i2c clock */ | ||
71 | I2C2_CPSR0 = 60; /* 24 MHz / 400 kHz */ | ||
72 | I2C2_CPSR1 = 0; /* MSB */ | ||
73 | |||
74 | /* set i2c slave address of codec part */ | ||
75 | I2C2_SLAD0 = AUDIO_I2C_ADDR << 1; | ||
76 | |||
77 | I2C2_CNTRL = 0x51; | ||
78 | } | ||
79 | |||
80 | |||
81 | /* returns != 0 when busy */ | ||
82 | static int i2c_busy(void) | ||
83 | { | ||
84 | return (I2C2_SR & 1); | ||
85 | } | ||
86 | |||
87 | |||
88 | /* returns 0 on success, <0 otherwise */ | ||
89 | int as3525_codec_write(int index, int value) | ||
90 | { | ||
91 | if (index == 0x21) { | ||
92 | /* prevent setting of the LREG_CP_not bit */ | ||
93 | value &= ~(1 << 5); | ||
94 | } | ||
95 | |||
96 | /* check if still busy */ | ||
97 | if (i2c_busy()) { | ||
98 | return -1; | ||
99 | } | ||
100 | |||
101 | /* start transfer */ | ||
102 | I2C2_SADDR = index; | ||
103 | I2C2_CNTRL &= ~(1 << 1); | ||
104 | I2C2_DATA = value; | ||
105 | I2C2_DACNT = 1; | ||
106 | |||
107 | /* wait for transfer*/ | ||
108 | while (i2c_busy()); | ||
109 | |||
110 | return 0; | ||
111 | } | ||
112 | |||
113 | |||
114 | /* returns value read on success, <0 otherwise */ | ||
115 | int as3525_codec_read(int index) | ||
116 | { | ||
117 | /* check if still busy */ | ||
118 | if (i2c_busy()) { | ||
119 | return -1; | ||
120 | } | ||
121 | |||
122 | /* start transfer */ | ||
123 | I2C2_SADDR = index; | ||
124 | I2C2_CNTRL |= (1 << 1); | ||
125 | I2C2_DACNT = 1; | ||
126 | |||
127 | /* wait for transfer*/ | ||
128 | while (i2c_busy()); | ||
129 | |||
130 | return I2C2_DATA; | ||
131 | } | ||
132 | |||
diff --git a/firmware/target/arm/as3525/as3525-codec.h b/firmware/target/arm/as3525/as3525-codec.h new file mode 100644 index 0000000000..9d694554c6 --- /dev/null +++ b/firmware/target/arm/as3525/as3525-codec.h | |||
@@ -0,0 +1,27 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id: $ | ||
9 | * | ||
10 | * Copyright (C) 2008 by Bertrik Sikken | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | void as3525_codec_init(void); | ||
23 | |||
24 | int as3525_codec_write(int index, int value); | ||
25 | int as3525_codec_read(int index); | ||
26 | |||
27 | |||