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-rw-r--r--firmware/SOURCES1
-rw-r--r--firmware/target/arm/gigabeat/meg-fx/i2c-meg-fx.c121
2 files changed, 122 insertions, 0 deletions
diff --git a/firmware/SOURCES b/firmware/SOURCES
index 423fe0ee38..ffc2387e66 100644
--- a/firmware/SOURCES
+++ b/firmware/SOURCES
@@ -302,6 +302,7 @@ target/arm/gigabeat/meg-fx/usb-meg-fx.c
302target/arm/gigabeat/meg-fx/lcd-meg-fx.c 302target/arm/gigabeat/meg-fx/lcd-meg-fx.c
303target/arm/gigabeat/meg-fx/sc606-meg-fx.c 303target/arm/gigabeat/meg-fx/sc606-meg-fx.c
304target/arm/gigabeat/meg-fx/adc-meg-fx.c 304target/arm/gigabeat/meg-fx/adc-meg-fx.c
305target/arm/gigabeat/meg-fx/i2c-meg-fx.c
305#endif 306#endif
306#endif 307#endif
307 308
diff --git a/firmware/target/arm/gigabeat/meg-fx/i2c-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/i2c-meg-fx.c
new file mode 100644
index 0000000000..c0e9fb4fc3
--- /dev/null
+++ b/firmware/target/arm/gigabeat/meg-fx/i2c-meg-fx.c
@@ -0,0 +1,121 @@
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2006 by Linus Nielsen Feltzing
11 *
12 * All files in this archive are subject to the GNU General Public License.
13 * See the file COPYING in the source tree root for full license agreement.
14 *
15 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
16 * KIND, either express or implied.
17 *
18 ****************************************************************************/
19#include "config.h"
20#include "cpu.h"
21#include <stdbool.h>
22#include "kernel.h"
23#include "system.h"
24#include "hwcompat.h"
25#include "logf.h"
26#include "debug.h"
27#include "string.h"
28#include "generic_i2c.h"
29
30void i2c_sda_output(void)
31{
32 GPECON |= (1 << 30);
33}
34
35void i2c_sda_input(void)
36{
37 GPECON &= ~(3 << 30);
38}
39
40void i2c_sda_lo(void)
41{
42 GPEDAT &= ~(1 << 15);
43}
44
45void i2c_sda_hi(void)
46{
47 GPEDAT |= (1 << 15);
48}
49
50int i2c_sda(void)
51{
52 return GPEDAT & (1 << 15);
53}
54
55void i2c_scl_output(void)
56{
57 GPECON |= (1 << 28);
58}
59
60void i2c_scl_input(void)
61{
62 GPECON &= ~(3 << 28);
63}
64
65void i2c_scl_lo(void)
66{
67 GPEDAT &= ~(1 << 14);
68}
69
70int i2c_scl(void)
71{
72 return GPEDAT & (1 << 14);
73}
74
75void i2c_scl_hi(void)
76{
77 i2c_scl_input();
78 while(!i2c_scl());
79 GPEDAT |= (1 << 14);
80 i2c_scl_output();
81}
82
83void i2c_delay(void)
84{
85 do { int _x; for(_x=0;_x<2000;_x++);} while (0);
86}
87
88struct i2c_interface s3c2440_i2c = {
89 0x34, /* Address */
90
91 /* Bit-banged interface definitions */
92 i2c_scl_hi, /* Drive SCL high, might sleep on clk stretch */
93 i2c_scl_lo, /* Drive SCL low */
94 i2c_sda_hi, /* Drive SDA high */
95 i2c_sda_lo, /* Drive SDA low */
96 i2c_sda_input, /* Set SDA as input */
97 i2c_sda_output, /* Set SDA as output */
98 i2c_scl_input, /* Set SCL as input */
99 i2c_scl_output, /* Set SCL as output */
100 i2c_scl, /* Read SCL, returns 0 or nonzero */
101 i2c_sda, /* Read SDA, returns 0 or nonzero */
102
103 i2c_delay, /* START SDA hold time (tHD:SDA) */
104 i2c_delay, /* SDA hold time (tHD:DAT) */
105 i2c_delay, /* SDA setup time (tSU:DAT) */
106 i2c_delay, /* STOP setup time (tSU:STO) */
107 i2c_delay, /* Rep. START setup time (tSU:STA) */
108 i2c_delay, /* SCL high period (tHIGH) */
109};
110
111void i2c_init(void)
112{
113 /* Set GPE15 (SDA) and GPE14 (SCL) to 1 */
114 GPECON = (GPECON & ~(0xF<<28)) | 5<<28;
115 i2c_add_node(&s3c2440_i2c);
116}
117
118void i2c_send(int bus_address, int reg_address, const unsigned char buf)
119{
120 i2c_write_data(bus_address, reg_address, &buf, 1);
121}