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-rw-r--r--firmware/target/arm/s3c2440/gigabeat-fx/adc-meg-fx.c140
-rw-r--r--firmware/target/arm/s3c2440/gigabeat-fx/i2c-meg-fx.c144
-rw-r--r--firmware/target/arm/s3c2440/gigabeat-fx/i2c-meg-fx.h46
-rw-r--r--firmware/target/arm/s3c2440/gigabeat-fx/wmcodec-meg-fx.c2
4 files changed, 1 insertions, 331 deletions
diff --git a/firmware/target/arm/s3c2440/gigabeat-fx/adc-meg-fx.c b/firmware/target/arm/s3c2440/gigabeat-fx/adc-meg-fx.c
deleted file mode 100644
index fd5151a3bf..0000000000
--- a/firmware/target/arm/s3c2440/gigabeat-fx/adc-meg-fx.c
+++ /dev/null
@@ -1,140 +0,0 @@
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2006 by Wade Brown
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#include "cpu.h"
22#include "system.h"
23#include "adc.h"
24#include "adc-target.h"
25#include "kernel.h"
26
27static unsigned short adc_readings[NUM_ADC_CHANNELS];
28
29/* prototypes */
30static unsigned short __adc_read(int channel);
31static void adc_tick(void);
32
33void adc_init(void)
34{
35 int i;
36
37 /* Turn on the ADC PCLK */
38 s3c_regset32(&CLKCON, 1<<15);
39
40 /* Set channel 0, normal mode, disable "start by read" */
41 ADCCON &= ~(0x3F);
42
43 /* No start delay. Use normal conversion mode. */
44 ADCDLY = 0x1;
45
46 /* Set and enable the prescaler */
47 ADCCON = (ADCCON & ~(0xff<<6)) | (0x19<<6);
48 ADCCON |= (1<<14);
49
50 /* prefill the adc channels */
51 for (i = 0; i < NUM_ADC_CHANNELS; i++)
52 {
53 adc_readings[i] = __adc_read(i);
54 }
55
56 /* start at zero so when the tick starts it is at zero */
57 adc_readings[0] = __adc_read(0);
58
59 /* attach the adc reading to the tick */
60 tick_add_task(adc_tick);
61}
62
63/* Called to get the recent ADC reading */
64inline unsigned short adc_read(int channel)
65{
66 return adc_readings[channel];
67}
68
69/**
70 * Read the ADC by polling
71 * @param channel The ADC channel to read
72 * @return 10bit reading from ADC channel or ADC_READ_ERROR if timeout
73 */
74static unsigned short __adc_read(int channel)
75{
76 int i;
77
78 /* Set the channel */
79 ADCCON = (ADCCON & ~(0x7<<3)) | (channel<<3);
80
81 /* Start the conversion process */
82 ADCCON |= 0x1;
83
84 /* Wait for a low Enable_start */
85 for (i = 20000;;)
86 {
87 if(0 == (ADCCON & 0x1))
88 {
89 break;
90 }
91 else
92 {
93 i--;
94 if (0 == i)
95 {
96 /* Ran out of time */
97 return ADC_READ_ERROR;
98 }
99 }
100 }
101
102 /* Wait for high End_of_Conversion */
103 for(i = 20000;;)
104 {
105 if(ADCCON & (1<<15))
106 {
107 break;
108 }
109 else
110 {
111 i--;
112 if(0 == i)
113 {
114 /* Ran out of time */
115 return ADC_READ_ERROR;
116 }
117 }
118 }
119 return (ADCDAT0 & 0x3ff);
120}
121
122/* add this to the tick so that the ADC converts are done in the background */
123static void adc_tick(void)
124{
125 static unsigned channel;
126
127 /* Check if the End Of Conversion is set */
128 if (ADCCON & (1<<15))
129 {
130 adc_readings[channel] = (ADCDAT0 & 0x3FF);
131 if (++channel >= NUM_ADC_CHANNELS)
132 {
133 channel = 0;
134 }
135
136 /* setup the next conversion and start it*/
137 ADCCON = (ADCCON & ~(0x7<<3)) | (channel<<3) | 0x01;
138 }
139}
140
diff --git a/firmware/target/arm/s3c2440/gigabeat-fx/i2c-meg-fx.c b/firmware/target/arm/s3c2440/gigabeat-fx/i2c-meg-fx.c
deleted file mode 100644
index 836dedd462..0000000000
--- a/firmware/target/arm/s3c2440/gigabeat-fx/i2c-meg-fx.c
+++ /dev/null
@@ -1,144 +0,0 @@
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2007 by Michael Sevakis
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#include "system.h"
22#include "i2c-meg-fx.h"
23
24static struct wakeup i2c_wake; /* Transfer completion signal */
25static struct mutex i2c_mtx; /* Mutual exclusion */
26static unsigned char *buf_ptr; /* Next byte to transfer */
27static int buf_count; /* Number of bytes remaining to transfer */
28
29static void i2c_stop(void)
30{
31 /* Generate STOP */
32 IICSTAT = I2C_MODE_MASTER | I2C_MODE_TX | I2C_RXTX_ENB;
33
34 /* No more interrupts, clear pending interrupt to continue */
35 IICCON &= ~(I2C_TXRX_INTPND | I2C_TXRX_INTENB);
36}
37
38void i2c_write(int addr, const unsigned char *buf, int count)
39{
40 if (count <= 0)
41 return;
42
43 mutex_lock(&i2c_mtx);
44
45 /* Turn on I2C clock */
46 s3c_regset32(&CLKCON, 1 << 16);
47
48 /* Set mode to master transmitter and enable lines */
49 IICSTAT = I2C_MODE_MASTER | I2C_MODE_TX | I2C_RXTX_ENB;
50
51 /* Set buffer start and count */
52 buf_ptr = (unsigned char *)buf;
53 buf_count = count;
54
55 /* Send slave address and then data */
56 SRCPND = IIC_MASK;
57 INTPND = IIC_MASK;
58
59 IICCON |= I2C_TXRX_INTENB;
60
61 /* Load slave address into shift register */
62 IICDS = addr & 0xfe;
63
64 /* Generate START */
65 IICSTAT = I2C_MODE_MASTER | I2C_MODE_TX | I2C_START | I2C_RXTX_ENB;
66
67 if (wakeup_wait(&i2c_wake, HZ) != OBJ_WAIT_SUCCEEDED)
68 {
69 /* Something went wrong - stop transmission */
70 int oldlevel = disable_irq_save();
71 i2c_stop();
72 restore_irq(oldlevel);
73 }
74
75 /* Go back to slave receive mode and disable lines */
76 IICSTAT = 0;
77
78 /* Turn off I2C clock */
79 s3c_regclr32(&CLKCON, 1 << 16);
80
81 mutex_unlock(&i2c_mtx);
82}
83
84void i2c_init(void)
85{
86 /* Init kernel objects */
87 wakeup_init(&i2c_wake);
88 mutex_init(&i2c_mtx);
89
90 /* Clear pending source */
91 SRCPND = IIC_MASK;
92 INTPND = IIC_MASK;
93
94 /* Enable i2c interrupt in controller */
95 s3c_regclr32(&INTMOD, IIC_MASK);
96 s3c_regclr32(&INTMSK, IIC_MASK);
97
98 /* Turn on I2C clock */
99 s3c_regset32(&CLKCON, 1 << 16);
100
101 /* Set GPE15 (IICSDA) and GPE14 (IICSCL) to IIC */
102 GPECON = (GPECON & ~((3 << 30) | (3 << 28))) |
103 ((2 << 30) | (2 << 28));
104
105 /* Bus ACK, IICCLK: fPCLK / 16, Rx/Tx Int: Disable, Tx clock: IICCLK/8 */
106 /* OF PCLK: 49.1568MHz / 16 / 8 = 384.0375 kHz */
107 IICCON = (7 << 0);
108
109 /* SDA line delayed 0 PCLKs */
110 IICLC = (0 << 0);
111
112 /* Turn off I2C clock */
113 s3c_regclr32(&CLKCON, 1 << 16);
114}
115
116void IIC(void)
117{
118 for (;;)
119 {
120 /* If ack was received from last byte and bytes are remaining */
121 if (--buf_count >= 0 && (IICSTAT & I2C_ACK_L) == 0)
122 {
123 /* Write next byte to shift register */
124 IICDS = *buf_ptr++;
125
126 /* Clear pending interrupt to continue */
127 IICCON &= ~I2C_TXRX_INTPND;
128 break;
129 }
130
131 /* Finished */
132
133 /* Generate STOP */
134 i2c_stop();
135
136 /* Signal thread */
137 wakeup_signal(&i2c_wake);
138 break;
139 }
140
141 /* Ack */
142 SRCPND = IIC_MASK;
143 INTPND = IIC_MASK;
144}
diff --git a/firmware/target/arm/s3c2440/gigabeat-fx/i2c-meg-fx.h b/firmware/target/arm/s3c2440/gigabeat-fx/i2c-meg-fx.h
deleted file mode 100644
index 793ee213fd..0000000000
--- a/firmware/target/arm/s3c2440/gigabeat-fx/i2c-meg-fx.h
+++ /dev/null
@@ -1,46 +0,0 @@
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2007 by Michael Sevakis
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/* chip-specific i2c functions */
23
24/* IICCON */
25#define I2C_ACKGEN (1 << 7)
26#define I2C_TXCLK_512 (1 << 6)
27#define I2C_TXRX_INTENB (1 << 5)
28#define I2C_TXRX_INTPND (1 << 4)
29
30/* IICSTAT */
31#define I2C_MODE_MASTER (2 << 6)
32#define I2C_MODE_TX (1 << 6)
33#define I2C_BUSY (1 << 5)
34#define I2C_START (1 << 5)
35#define I2C_RXTX_ENB (1 << 4)
36#define I2C_BUS_ARB_FAILED (1 << 3)
37#define I2C_S_ADDR_STAT (1 << 2)
38#define I2C_S_ADDR_MATCH (1 << 1)
39#define I2C_ACK_L (1 << 0)
40
41/* IICLC */
42#define I2C_FLT_ENB (1 << 2)
43
44void i2c_init(void);
45void i2c_write(int addr, const unsigned char *data, int count);
46
diff --git a/firmware/target/arm/s3c2440/gigabeat-fx/wmcodec-meg-fx.c b/firmware/target/arm/s3c2440/gigabeat-fx/wmcodec-meg-fx.c
index 52c26b898d..01b177da6c 100644
--- a/firmware/target/arm/s3c2440/gigabeat-fx/wmcodec-meg-fx.c
+++ b/firmware/target/arm/s3c2440/gigabeat-fx/wmcodec-meg-fx.c
@@ -28,7 +28,7 @@
28#include "cpu.h" 28#include "cpu.h"
29#include "kernel.h" 29#include "kernel.h"
30#include "sound.h" 30#include "sound.h"
31#include "i2c-meg-fx.h" 31#include "i2c-s3c2440.h"
32#include "system-target.h" 32#include "system-target.h"
33#include "timer.h" 33#include "timer.h"
34#include "wmcodec.h" 34#include "wmcodec.h"
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-12 18:57:22 +0000