1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id $
*
* Copyright (C) 2006,2007 by Marcoen Hirschberg
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "cpu.h"
#include "kernel.h"
#include "thread.h"
#include "system.h"
#include "power.h"
#include "panic.h"
#include "pcf50606.h"
#include "ata-target.h"
#include "mmu-meg-fx.h"
#include "backlight-target.h"
/* ARESET on C7C68300 and RESET on ATA interface (Active Low) */
#define ATA_RESET_ENABLE GPGDAT &= ~(1 << 10)
#define ATA_RESET_DISABLE GPGDAT |= (1 << 10)
/* ATA_EN on C7C68300 */
#define USB_ATA_ENABLE GPBDAT |= (1 << 5)
#define USB_ATA_DISABLE GPBDAT &= ~(1 << 5)
void ata_reset(void)
{
ATA_RESET_ENABLE;
sleep(1); /* > 25us */
ATA_RESET_DISABLE;
sleep(1); /* > 2ms */
}
/* This function is called before enabling the USB bus */
void ata_enable(bool on)
{
GPBCON=( GPBCON&~(1<<11) ) | (1<<10); /* Make the pin an output */
GPBUP|=1<<5; /* Disable pullup in SOC as we are now driving */
if(on)
USB_ATA_DISABLE;
else
USB_ATA_ENABLE;
}
bool ata_is_coldstart(void)
{
/* Check the pin configuration - return true when pin is unconfigured */
return (GPGCON & 0x00300000) == 0;
}
void ata_device_init(void)
{
GPGCON=( GPGCON&~(1<<21) ) | (1<<20); /* Make the pin an output */
GPGUP |= 1<<10; /* Disable pullup in SOC as we are now driving */
/* ATA reset */
ATA_RESET_DISABLE; /* Set the pin to disable an active low reset */
}
#if !defined(BOOTLOADER)
void copy_read_sectors(unsigned char* buf, int wordcount)
{
__buttonlight_trigger();
/* Unaligned transfer - slow copy */
if ( (unsigned long)buf & 1)
{ /* not 16-bit aligned, copy byte by byte */
unsigned short tmp = 0;
unsigned char* bufend = buf + wordcount*2;
do
{
tmp = ATA_DATA;
*buf++ = tmp & 0xff; /* I assume big endian */
*buf++ = tmp >> 8; /* and don't use the SWAB16 macro */
} while (buf < bufend); /* tail loop is faster */
return;
}
/* This should never happen, but worth watching for */
if(wordcount > (1 << 18))
panicf("atd-meg-fx.c: copy_read_sectors: too many sectors per read!");
//#define GIGABEAT_DEBUG_ATA
#ifdef GIGABEAT_DEBUG_ATA
static int line = 0;
static char str[256];
snprintf(str, sizeof(str), "ODD DMA to %08x, %d", buf, wordcount);
lcd_puts(10, line, str);
line = (line+1) % 32;
lcd_update();
#endif
/* Reset the channel */
DMASKTRIG0 |= 4;
/* Wait for DMA controller to be ready */
while(DMASKTRIG0 & 0x2)
;
while(DSTAT0 & (1 << 20))
;
/* Source is ATA_DATA, on AHB Bus, Fixed */
DISRC0 = (int) 0x18000000;
DISRCC0 = 0x1;
/* Dest mapped to physical address, on AHB bus, increment */
DIDST0 = (int) buf;
if(DIDST0 < 0x30000000)
DIDST0 += 0x30000000;
DIDSTC0 = 0;
/* DACK/DREQ Sync to AHB, Whole service, No reload, 16-bit transfers */
DCON0 = ((1 << 30) | (1<<27) | (1<<22) | (1<<20)) | wordcount;
/* Activate the channel */
DMASKTRIG0 = 0x2;
invalidate_dcache_range((void *)buf, wordcount*2);
/* Start DMA */
DMASKTRIG0 |= 0x1;
/* Wait for transfer to complete */
while((DSTAT0 & 0x000fffff))
priority_yield();
/* Dump cache for the buffer */
}
#endif
|
