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lxdream.org :: lxdream/src/gdrom/ide.c
lxdream 0.9.1
released Jun 29
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filename src/gdrom/ide.c
changeset 629:2811e8a2debf
prev561:533f6b478071
next678:35eb00945316
author nkeynes
date Fri Feb 08 11:30:04 2008 +0000 (12 years ago)
permissions -rw-r--r--
last change Bail out properly on read errors during a DMA cycle
file annotate diff log raw
nkeynes@31
     1
/**
nkeynes@561
     2
 * $Id$
nkeynes@2
     3
 *
nkeynes@31
     4
 * IDE interface implementation
nkeynes@31
     5
 *
nkeynes@152
     6
 *
nkeynes@152
     7
 * Note: All references to read/write are from the host's point of view.
nkeynes@152
     8
 *
nkeynes@152
     9
 * See: INF-8020 
nkeynes@31
    10
 * Copyright (c) 2005 Nathan Keynes.
nkeynes@31
    11
 *
nkeynes@31
    12
 * This program is free software; you can redistribute it and/or modify
nkeynes@31
    13
 * it under the terms of the GNU General Public License as published by
nkeynes@31
    14
 * the Free Software Foundation; either version 2 of the License, or
nkeynes@31
    15
 * (at your option) any later version.
nkeynes@31
    16
 *
nkeynes@31
    17
 * This program is distributed in the hope that it will be useful,
nkeynes@31
    18
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
nkeynes@31
    19
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nkeynes@31
    20
 * GNU General Public License for more details.
nkeynes@2
    21
 */
nkeynes@35
    22
nkeynes@35
    23
#define MODULE ide_module
nkeynes@35
    24
nkeynes@138
    25
#include <assert.h>
nkeynes@2
    26
#include <stdlib.h>
nkeynes@35
    27
#include "dream.h"
nkeynes@422
    28
#include "mem.h"
nkeynes@125
    29
#include "asic.h"
nkeynes@39
    30
#include "gdrom/ide.h"
nkeynes@125
    31
#include "gdrom/gdrom.h"
nkeynes@142
    32
#include "gdrom/packet.h"
nkeynes@2
    33
nkeynes@138
    34
#define MAX_WRITE_BUF 4096
nkeynes@138
    35
#define MAX_SECTOR_SIZE 2352 /* Audio sector */
nkeynes@138
    36
#define DEFAULT_DATA_SECTORS 8
nkeynes@2
    37
nkeynes@138
    38
static void ide_init( void );
nkeynes@138
    39
static void ide_reset( void );
nkeynes@342
    40
static uint32_t ide_run_slice( uint32_t nanosecs );
nkeynes@138
    41
static void ide_save_state( FILE *f );
nkeynes@138
    42
static int ide_load_state( FILE *f );
nkeynes@138
    43
static void ide_raise_interrupt( void );
nkeynes@138
    44
static void ide_clear_interrupt( void );
nkeynes@152
    45
static void ide_packet_command( unsigned char *data );
nkeynes@342
    46
static void ide_read_next_sector(void);
nkeynes@15
    47
nkeynes@342
    48
struct dreamcast_module ide_module = { "IDE", ide_init, ide_reset, NULL, ide_run_slice,
nkeynes@138
    49
				       NULL, ide_save_state, ide_load_state };
nkeynes@15
    50
nkeynes@2
    51
struct ide_registers idereg;
nkeynes@342
    52
gdrom_disc_t gdrom_disc = NULL;
nkeynes@342
    53
nkeynes@342
    54
unsigned char data_buffer[MAX_SECTOR_SIZE];
nkeynes@2
    55
nkeynes@152
    56
#define WRITE_BUFFER(x16) *((uint16_t *)(data_buffer + idereg.data_offset)) = x16
nkeynes@152
    57
#define READ_BUFFER() *((uint16_t *)(data_buffer + idereg.data_offset))
nkeynes@152
    58
nkeynes@493
    59
/* 10 bytes followed by "SE      REV 6.42990316" */
nkeynes@493
    60
unsigned char default_gdrom_mode[GDROM_MODE_LENGTH] = 
nkeynes@493
    61
    { 0x00, 0x00, 0x00, 0x00, 0x00, 0xb4, 0x19, 0x00, 0x00, 0x08,
nkeynes@493
    62
      0x53, 0x45, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 
nkeynes@493
    63
      0x52, 0x65, 0x76, 0x20, 0x36, 0x2e, 0x34, 0x32, 0x39, 0x39, 0x30, 0x33, 0x31, 0x36 };
nkeynes@493
    64
      
nkeynes@158
    65
unsigned char gdrom_71[] = { 0x3E, 0x0F, 0x90, 0xBE,  0x1D, 0xD9, 0x89, 0x04,  0x28, 0x3A, 0x8E, 0x26,  0x5C, 0x95, 0x10, 0x5A,
nkeynes@158
    66
				 0x0A, 0x99, 0xEE, 0xFB,  0x69, 0xCE, 0xD9, 0x63,  0x00, 0xF5, 0x0A, 0xBC,  0x2C, 0x0D, 0xF8, 0xE2,
nkeynes@158
    67
				 0x05, 0x02, 0x00, 0x7C,  0x03, 0x00, 0x3D, 0x08,  0xD8, 0x8D, 0x08, 0x7A,  0x6D, 0x00, 0x35, 0x06,
nkeynes@158
    68
				 0xBA, 0x66, 0x10, 0x00,  0x91, 0x08, 0x10, 0x29,  0xD0, 0x45, 0xDA, 0x00,  0x2D, 0x05, 0x69, 0x09,
nkeynes@158
    69
				 0x00, 0x5E, 0x0F, 0x70,  0x86, 0x12, 0x6C, 0x77,  0x5A, 0xFB, 0xCD, 0x56,  0xFB, 0xF7, 0xB7, 0x00,
nkeynes@158
    70
				 0x5D, 0x07, 0x19, 0x99,  0xF2, 0xAF, 0x00, 0x63,  0x03, 0x00, 0xF0, 0x10,  0xBE, 0xD7, 0xA0, 0x63,
nkeynes@158
    71
				 0xFA, 0x84, 0xA7, 0x74,  0x94, 0xEF, 0xAD, 0xC2,  0xAC, 0x00, 0x78, 0x07,  0x9F, 0x57, 0x0B, 0x62,
nkeynes@158
    72
				 0x00, 0xFE, 0x08, 0x08,  0x5D, 0x5A, 0x6A, 0x54,  0x00, 0xE2, 0x09, 0x93,  0x7E, 0x62, 0x2A, 0x5E,
nkeynes@158
    73
				 0xDA, 0x00, 0x7E, 0x0F,  0xF0, 0x07, 0x01, 0x6D,  0x50, 0x86, 0xDD, 0x4A,  0x15, 0x54, 0xC7, 0xEC,
nkeynes@158
    74
				 0x00, 0xF2, 0x0B, 0x07,  0xF8, 0x1A, 0xB0, 0x99,  0x3B, 0xF1, 0x36, 0x00,  0x94, 0x07, 0x34, 0xE3,
nkeynes@158
    75
				 0xBC, 0x6E, 0x00, 0x34,  0x0D, 0x6F, 0xDA, 0xBD,  0xEE, 0xF7, 0xCC, 0xCE,  0x39, 0x7E, 0xE3, 0x00,
nkeynes@158
    76
				 0x14, 0x08, 0xDC, 0xD2,  0xB9, 0xF9, 0x31, 0x00,  0xB0, 0x0C, 0x10, 0xA3,  0x45, 0x12, 0xC7, 0xCD,
nkeynes@158
    77
				 0xBF, 0x05, 0x37, 0x00,  0xC4, 0x0D, 0x5F, 0xE0,  0x59, 0xBB, 0x01, 0x59,  0x03, 0xD6, 0x29, 0x9C,
nkeynes@158
    78
				 0x00, 0x01, 0x0A, 0x09,  0xAA, 0xA8, 0xA8, 0x24,  0x0B, 0x66, 0x00, 0x5C,  0x05, 0xA5, 0xCE, 0x00,
nkeynes@158
    79
				 0xC1, 0x0B, 0xB7, 0xA0,  0x6F, 0xE9, 0x2B, 0xCC,  0xB5, 0xFC, 0x00, 0x8D,  0x05, 0xF4, 0xAC, 0x00,
nkeynes@158
    80
				 0x57, 0x04, 0xB6, 0x00,  0xFC, 0x03, 0x00, 0xC3,  0x10, 0x43, 0x3B, 0xBE,  0xA2, 0x96, 0xC3, 0x65,
nkeynes@158
    81
				 0x9F, 0x9A, 0x88, 0xD5,  0x49, 0x68, 0x00, 0xDC,  0x11, 0x56, 0x23, 0x2D,  0xF9, 0xFC, 0xF5, 0x8B,
nkeynes@158
    82
				 0x1B, 0xB1, 0xB7, 0x10,  0x21, 0x1C, 0x12, 0x00,  0x0D, 0x0D, 0xEB, 0x86,  0xA2, 0x49, 0x8D, 0x8D,
nkeynes@158
    83
				 0xBE, 0xA1, 0x6D, 0x53,  0x00, 0xE1, 0x0A, 0x8E,  0x67, 0xAA, 0x16, 0x79,  0x39, 0x59, 0x00, 0x36,
nkeynes@158
    84
				 0x0B, 0x2A, 0x4E, 0xAE,  0x51, 0x4B, 0xD0, 0x66,  0x33, 0x00, 0x8A, 0x07,  0xCD, 0x6F, 0xBA, 0x92,
nkeynes@158
    85
				 0x00, 0x1A, 0x0E, 0xDF,  0x4A, 0xB3, 0x77, 0x1F,  0xA5, 0x90, 0x19, 0xFA,  0x59, 0xD7, 0x00, 0x04,
nkeynes@158
    86
				 0x0F, 0xAC, 0xCA, 0x9F,  0xA4, 0xFC, 0x6D, 0x90,  0x86, 0x9E, 0x1F, 0x44,  0x40, 0x00, 0x9F, 0x04,
nkeynes@158
    87
				 0x56, 0x00, 0x22, 0x03,  0x00, 0xB8, 0x10, 0x2C,  0x7A, 0x53, 0xA4, 0xBF,  0xA3, 0x90, 0x90, 0x14,
nkeynes@158
    88
				 0x9D, 0x46, 0x6C, 0x96,  0x00, 0xC6, 0x0B, 0x9B,  0xBB, 0xB0, 0xAE, 0x60,  0x92, 0x8E, 0x0C, 0x00,
nkeynes@158
    89
				 0x14, 0x06, 0x4B, 0xAE,  0x7F, 0x00, 0x5C, 0x0B,  0x23, 0xFA, 0xE7, 0x51,  0xDA, 0x61, 0x49, 0x5E,
nkeynes@158
    90
				 0x00, 0xD7, 0x0B, 0x01,  0xFC, 0x55, 0x31, 0x84,  0xC5, 0x0C, 0x98, 0x00,  0x97, 0x50, 0x6E, 0xF9,
nkeynes@158
    91
				 0xEE, 0x75, 0x92, 0x53,  0xD3, 0x66, 0xA4, 0xAF,  0x3B, 0xFE, 0x7B, 0x27,  0x30, 0xBB, 0xB6, 0xF2,
nkeynes@158
    92
				 0x76, 0x22, 0x45, 0x42,  0xCA, 0xF9, 0xF0, 0xDE,  0x9F, 0x45, 0x16, 0x68,  0x22, 0xB9, 0x84, 0x28,
nkeynes@158
    93
				 0x8F, 0x2B, 0xB5, 0x5C,  0xD2, 0xF5, 0x45, 0x36,  0x3E, 0x76, 0xC6, 0xBF,  0x32, 0x5C, 0x41, 0xA6,
nkeynes@158
    94
				 0x26, 0xC7, 0x82, 0x2F,  0x2E, 0xB5, 0x75, 0xC6,  0xE6, 0x67, 0x9E, 0x77,  0x94, 0xAF, 0x6A, 0x05,
nkeynes@158
    95
				 0xC0, 0x05, 0x61, 0x71,  0x89, 0x5A, 0xB1, 0xD0,  0xFC, 0x7E, 0xC0, 0x9B,  0xCB, 0x3B, 0x69, 0xD9,
nkeynes@158
    96
				 0x5F, 0xAF, 0xCA, 0xAB,  0x25, 0xD5, 0xBE, 0x8A,  0x6B, 0xB0, 0xFB, 0x61,  0x6C, 0xEB, 0x85, 0x6E,
nkeynes@158
    97
				 0x7A, 0x48, 0xFF, 0x97,  0x91, 0x06, 0x3D, 0x4D,  0x68, 0xD3, 0x65, 0x83,  0x90, 0xA0, 0x08, 0x5C,
nkeynes@158
    98
				 0xFC, 0xEE, 0x7C, 0x33,  0x43, 0x7F, 0x80, 0x52,  0x8B, 0x19, 0x72, 0xF2,  0xC9, 0xAB, 0x93, 0xAF,
nkeynes@158
    99
				 0x16, 0xED, 0x36, 0x48,  0xAB, 0xC9, 0xD1, 0x03,  0xB3, 0xDC, 0x2F, 0xF2,  0x92, 0x3F, 0x0A, 0x19,
nkeynes@158
   100
				 0x25, 0xE2, 0xEF, 0x7A,  0x22, 0xDA, 0xDB, 0xCB,  0x32, 0x12, 0x61, 0x49,  0x5B, 0x74, 0x7C, 0x65,
nkeynes@158
   101
				 0x20, 0x89, 0x54, 0x9E,  0x0E, 0xC9, 0x52, 0xE3,  0xC9, 0x9A, 0x44, 0xC9,  0x5D, 0xA6, 0x77, 0xC0,
nkeynes@158
   102
				 0xE7, 0x60, 0x91, 0x80,  0x50, 0x1F, 0x33, 0xB1,  0xCD, 0xAD, 0xF4, 0x0D,  0xBB, 0x08, 0xB1, 0xD0,
nkeynes@158
   103
				 0x13, 0x95, 0xAE, 0xC9,  0xE2, 0x64, 0xA2, 0x65,  0xFB, 0x8F, 0xE9, 0xA2,  0x8A, 0xBC, 0x98, 0x81,
nkeynes@158
   104
				 0x45, 0xB4, 0x55, 0x4E,  0xB9, 0x74, 0xB4, 0x50,  0x76, 0xBF, 0xF0, 0x45,  0xE7, 0xEE, 0x41, 0x64,
nkeynes@158
   105
				 0x9F, 0xB5, 0xE0, 0xBB,  0x1C, 0xBB, 0x28, 0x66,  0x1B, 0xDD, 0x2B, 0x02,  0x66, 0xBF, 0xFD, 0x7D,
nkeynes@158
   106
				 0x37, 0x35, 0x1D, 0x76,  0x21, 0xC3, 0x8F, 0xAF,  0xF6, 0xF9, 0xE9, 0x27,  0x48, 0xE7, 0x3D, 0x95,
nkeynes@158
   107
				 0x74, 0x0C, 0x77, 0x88,  0x56, 0xD9, 0x84, 0xC8,  0x7D, 0x20, 0x31, 0x43,  0x53, 0xF1, 0xC1, 0xC7,
nkeynes@158
   108
				 0xC9, 0xF7, 0x5C, 0xC0,  0xA6, 0x5A, 0x27, 0x0A,  0x41, 0xD4, 0x44, 0x94,  0x65, 0x4F, 0xE2, 0x53,
nkeynes@158
   109
				 0x60, 0x0B, 0xD1, 0x23,  0x6C, 0x0C, 0xBC, 0x70,  0x6C, 0x26, 0x1A, 0x61,  0x1D, 0x35, 0x88, 0xEC,
nkeynes@158
   110
				 0xB8, 0x15, 0xE3, 0xB4,  0x82, 0xEE, 0xB3, 0x21,  0xAC, 0x6C, 0xB7, 0x33,  0x6D, 0x78, 0x0C, 0x0D,
nkeynes@158
   111
				 0xB4, 0x0B, 0x29, 0xF2,  0xD4, 0x8C, 0x3F, 0xDD,  0x3F, 0x47, 0xDD, 0xF2,  0xD8, 0x39, 0x57, 0x20,
nkeynes@158
   112
				 0x28, 0xD8, 0xDD, 0x32,  0xE2, 0x6A, 0x47, 0x53,  0x57, 0xC6, 0xFA, 0x7A,  0x38, 0x30, 0x31, 0x8F,
nkeynes@158
   113
				 0xE7, 0xD3, 0x84, 0x2B,  0x5D, 0x4F, 0x95, 0x98,  0xED, 0x0B, 0xD7, 0x50,  0x0C, 0x49, 0xDA, 0x59,
nkeynes@158
   114
				 0x15, 0xF1, 0x39, 0xF3,  0x40, 0xDC, 0xDC, 0x25,  0x24, 0x56, 0x6E, 0xA9,  0x2F, 0xF0, 0x00, 0x00 };
nkeynes@158
   115
nkeynes@2
   116
nkeynes@250
   117
char gdrom_status[] = { 
nkeynes@250
   118
    0x00, 0x15, 0x00, 0x64, 0x00, 0x40, 0x00, 0x00, 
nkeynes@250
   119
    0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00,
nkeynes@250
   120
    0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00,
nkeynes@250
   121
    0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00,
nkeynes@250
   122
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
nkeynes@250
   123
    0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00,
nkeynes@250
   124
    0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
nkeynes@250
   125
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
nkeynes@250
   126
    0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x40, 0x40,
nkeynes@250
   127
    0x40, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00,
nkeynes@250
   128
    0x00, 0x40, 0x40, 0x00, 0x00, 0x00, 0x40, 0x40,
nkeynes@250
   129
    0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x40, 0x00,
nkeynes@250
   130
    0x00, 0x40, 0x00, 0x00 };
nkeynes@250
   131
nkeynes@250
   132
nkeynes@138
   133
static void ide_init( void )
nkeynes@138
   134
{
nkeynes@138
   135
    ide_reset();
nkeynes@138
   136
}
nkeynes@138
   137
nkeynes@138
   138
static void ide_reset( void )
nkeynes@138
   139
{
nkeynes@138
   140
    ide_clear_interrupt();
nkeynes@138
   141
    idereg.error = 0x01;
nkeynes@138
   142
    idereg.count = 0x01;
nkeynes@138
   143
    idereg.lba0 = /* 0x21; */ 0x81;
nkeynes@138
   144
    idereg.lba1 = 0x14;
nkeynes@138
   145
    idereg.lba2 = 0xeb;
nkeynes@138
   146
    idereg.feature = 0; /* Indeterminate really */
nkeynes@254
   147
    idereg.status = 0x00;
nkeynes@138
   148
    idereg.device = 0x00;
nkeynes@152
   149
    idereg.state = IDE_STATE_IDLE;
nkeynes@152
   150
    memset( idereg.gdrom_sense, '\0', 10 );
nkeynes@493
   151
    memcpy( idereg.gdrom_mode, default_gdrom_mode, GDROM_MODE_LENGTH );
nkeynes@152
   152
    idereg.data_offset = -1;
nkeynes@152
   153
    idereg.data_length = -1;
nkeynes@245
   154
    idereg.last_read_track = 1;
nkeynes@493
   155
    idereg.current_lba = 150;
nkeynes@493
   156
    idereg.current_mode = 0x28;
nkeynes@342
   157
    idereg.sectors_left = 0;
nkeynes@254
   158
    idereg.was_reset = TRUE;
nkeynes@138
   159
}
nkeynes@138
   160
nkeynes@342
   161
static uint32_t ide_run_slice( uint32_t nanosecs )
nkeynes@342
   162
{
nkeynes@342
   163
    if( gdrom_disc != NULL && gdrom_disc->run_time_slice != NULL ) {
nkeynes@342
   164
	gdrom_disc->run_time_slice(gdrom_disc, nanosecs);
nkeynes@342
   165
    }
nkeynes@342
   166
    return nanosecs;
nkeynes@342
   167
}
nkeynes@342
   168
nkeynes@138
   169
static void ide_save_state( FILE *f )
nkeynes@138
   170
{
nkeynes@152
   171
    fwrite( &idereg, sizeof(idereg), 1, f );
nkeynes@342
   172
    fwrite( data_buffer, MAX_SECTOR_SIZE, 1, f );
nkeynes@138
   173
}
nkeynes@138
   174
nkeynes@138
   175
static int ide_load_state( FILE *f )
nkeynes@138
   176
{
nkeynes@152
   177
    fread( &idereg, sizeof(idereg), 1, f );
nkeynes@342
   178
    fread( data_buffer, MAX_SECTOR_SIZE, 1, f );
nkeynes@138
   179
    return 0;
nkeynes@138
   180
}
nkeynes@125
   181
nkeynes@152
   182
/************************ State transitions *************************/
nkeynes@152
   183
nkeynes@158
   184
void ide_set_packet_result( uint16_t result )
nkeynes@158
   185
{
nkeynes@158
   186
    idereg.gdrom_sense[0] = 0xf0;
nkeynes@158
   187
    idereg.gdrom_sense[2] = result & 0xFF;
nkeynes@158
   188
    idereg.gdrom_sense[8] = (result >> 8) & 0xFF;
nkeynes@158
   189
    idereg.error = (result & 0x0F) << 4;
nkeynes@254
   190
    idereg.count = 3;
nkeynes@158
   191
    if( result != 0 ) {
nkeynes@158
   192
	idereg.status = 0x51;
nkeynes@629
   193
	idereg.state = IDE_STATE_IDLE;
nkeynes@158
   194
	ide_raise_interrupt();
nkeynes@158
   195
    } else {
nkeynes@158
   196
	idereg.status = idereg.status & ~(IDE_STATUS_BSY|IDE_STATUS_CHK);
nkeynes@158
   197
    }
nkeynes@158
   198
}
nkeynes@158
   199
nkeynes@152
   200
/**
nkeynes@152
   201
 * Begin command packet write to the device. This is always 12 bytes of PIO data
nkeynes@152
   202
 */
nkeynes@152
   203
static void ide_start_command_packet_write( )
nkeynes@2
   204
{
nkeynes@152
   205
    idereg.state = IDE_STATE_CMD_WRITE;
nkeynes@254
   206
    idereg.status = 0x58;
nkeynes@152
   207
    idereg.error = idereg.feature & 0x03; /* Copy values of OVL/DMA */
nkeynes@152
   208
    idereg.count = IDE_COUNT_CD;
nkeynes@152
   209
    idereg.data_offset = 0;
nkeynes@152
   210
    idereg.data_length = 12;
nkeynes@2
   211
}
nkeynes@2
   212
nkeynes@152
   213
/**
nkeynes@493
   214
 * Begin PIO/DMA read from the device. The data is assumed to already be
nkeynes@152
   215
 * in the buffer at this point.
nkeynes@152
   216
 */
nkeynes@342
   217
static void ide_start_read( int length, gboolean dma ) 
nkeynes@2
   218
{
nkeynes@152
   219
    idereg.count = IDE_COUNT_IO;
nkeynes@152
   220
    idereg.data_length = length;
nkeynes@152
   221
    idereg.data_offset = 0;
nkeynes@152
   222
    if( dma ) {
nkeynes@152
   223
	idereg.state = IDE_STATE_DMA_READ;
nkeynes@158
   224
	idereg.status = 0xD0;
nkeynes@152
   225
    } else {
nkeynes@152
   226
	idereg.state = IDE_STATE_PIO_READ;
nkeynes@254
   227
	idereg.status = 0x58;
nkeynes@342
   228
	idereg.lba1 = length & 0xFF;
nkeynes@342
   229
	idereg.lba2 = length >> 8; 
nkeynes@158
   230
	ide_raise_interrupt( );
nkeynes@152
   231
    }
nkeynes@152
   232
}
nkeynes@152
   233
nkeynes@493
   234
static void ide_start_write( int length, gboolean dma )
nkeynes@493
   235
{
nkeynes@493
   236
    idereg.count = 0;
nkeynes@493
   237
    idereg.data_length = length;
nkeynes@493
   238
    idereg.data_offset = 0;
nkeynes@493
   239
    if( dma ) {
nkeynes@493
   240
	idereg.state = IDE_STATE_DMA_WRITE;
nkeynes@493
   241
	idereg.status = 0xD0;
nkeynes@493
   242
    }  else {
nkeynes@493
   243
	idereg.state = IDE_STATE_PIO_WRITE;
nkeynes@493
   244
	idereg.status = 0x58;
nkeynes@493
   245
	idereg.lba1 = length & 0xFF;
nkeynes@493
   246
	idereg.lba2 = length >> 8;
nkeynes@493
   247
	ide_raise_interrupt( );
nkeynes@493
   248
    }
nkeynes@493
   249
}
nkeynes@493
   250
nkeynes@342
   251
static void ide_start_packet_read( int length, int sector_count )
nkeynes@152
   252
{
nkeynes@342
   253
    idereg.sectors_left = sector_count;
nkeynes@158
   254
    ide_set_packet_result( PKT_ERR_OK );
nkeynes@342
   255
    ide_start_read( length, (idereg.feature & IDE_FEAT_DMA) ? TRUE : FALSE );
nkeynes@2
   256
}
nkeynes@2
   257
nkeynes@493
   258
static void ide_start_packet_write( int length, int sector_count )
nkeynes@493
   259
{
nkeynes@493
   260
    idereg.sectors_left = sector_count;
nkeynes@493
   261
    ide_set_packet_result( PKT_ERR_OK );
nkeynes@493
   262
    ide_start_write( length, (idereg.feature & IDE_FEAT_DMA) ? TRUE : FALSE );
nkeynes@493
   263
}
nkeynes@493
   264
nkeynes@125
   265
static void ide_raise_interrupt( void )
nkeynes@2
   266
{
nkeynes@125
   267
    if( idereg.intrq_pending == 0 ) {
nkeynes@125
   268
	idereg.intrq_pending = 1;
nkeynes@125
   269
	if( IS_IDE_IRQ_ENABLED() )
nkeynes@125
   270
	    asic_event( EVENT_IDE );
nkeynes@125
   271
    }
nkeynes@125
   272
}
nkeynes@125
   273
nkeynes@125
   274
static void ide_clear_interrupt( void ) 
nkeynes@125
   275
{
nkeynes@125
   276
    if( idereg.intrq_pending != 0 ) {
nkeynes@125
   277
	idereg.intrq_pending = 0;
nkeynes@125
   278
	if( IS_IDE_IRQ_ENABLED() )
nkeynes@125
   279
	    asic_clear_event( EVENT_IDE );
nkeynes@125
   280
    }
nkeynes@125
   281
}
nkeynes@125
   282
nkeynes@125
   283
static void ide_set_error( int error_code )
nkeynes@125
   284
{
nkeynes@125
   285
    idereg.status = 0x51;
nkeynes@125
   286
    idereg.error = error_code;
nkeynes@2
   287
}
nkeynes@2
   288
nkeynes@125
   289
uint8_t ide_read_status( void ) 
nkeynes@125
   290
{
nkeynes@152
   291
    if( (idereg.status & IDE_STATUS_BSY) == 0 )
nkeynes@125
   292
	ide_clear_interrupt();
nkeynes@125
   293
    return idereg.status;
nkeynes@2
   294
}
nkeynes@2
   295
nkeynes@2
   296
uint16_t ide_read_data_pio( void ) {
nkeynes@152
   297
    if( idereg.state == IDE_STATE_PIO_READ ) {
nkeynes@152
   298
	uint16_t rv = READ_BUFFER();
nkeynes@152
   299
	idereg.data_offset += 2;
nkeynes@152
   300
	if( idereg.data_offset >= idereg.data_length ) {
nkeynes@152
   301
	    idereg.state = IDE_STATE_IDLE;
nkeynes@152
   302
	    idereg.status &= ~IDE_STATUS_DRQ;
nkeynes@152
   303
	    idereg.data_offset = -1;
nkeynes@254
   304
	    idereg.count = 3; /* complete */
nkeynes@152
   305
	    ide_raise_interrupt();
nkeynes@342
   306
	    if( idereg.sectors_left > 0 ) {
nkeynes@342
   307
		ide_read_next_sector();
nkeynes@342
   308
	    }
nkeynes@152
   309
	}
nkeynes@152
   310
	return rv;
nkeynes@152
   311
    } else {
nkeynes@2
   312
        return 0xFFFF;
nkeynes@2
   313
    }
nkeynes@2
   314
}
nkeynes@2
   315
nkeynes@152
   316
nkeynes@152
   317
/**
nkeynes@152
   318
 * DMA read request
nkeynes@152
   319
 *
nkeynes@152
   320
 * This method is called from the ASIC side when a DMA read request is
nkeynes@152
   321
 * initiated. If there is a pending DMA transfer already, we copy the
nkeynes@152
   322
 * data immediately, otherwise we record the DMA buffer for use when we
nkeynes@152
   323
 * get to actually doing the transfer.
nkeynes@152
   324
 * @return number of bytes transfered
nkeynes@152
   325
 */
nkeynes@152
   326
uint32_t ide_read_data_dma( uint32_t addr, uint32_t length )
nkeynes@152
   327
{
nkeynes@342
   328
    uint32_t xfercount = 0;
nkeynes@629
   329
    while( xfercount < length && idereg.state == IDE_STATE_DMA_READ ) {
nkeynes@629
   330
	int xferlen = length - xfercount;
nkeynes@629
   331
	int remaining = idereg.data_length - idereg.data_offset;
nkeynes@629
   332
	if( xferlen > remaining ) {
nkeynes@629
   333
	    xferlen = remaining;
nkeynes@629
   334
	}
nkeynes@629
   335
	mem_copy_to_sh4( addr, (data_buffer + idereg.data_offset), xferlen );
nkeynes@629
   336
	xfercount += xferlen;
nkeynes@629
   337
	addr += xferlen;
nkeynes@629
   338
	idereg.data_offset += xferlen;
nkeynes@629
   339
	if( idereg.data_offset >= idereg.data_length ) {
nkeynes@629
   340
	    if( idereg.sectors_left > 0 ) {
nkeynes@629
   341
		ide_read_next_sector();
nkeynes@629
   342
	    } else {
nkeynes@629
   343
		idereg.data_offset = -1;
nkeynes@629
   344
		idereg.state = IDE_STATE_IDLE;
nkeynes@629
   345
		idereg.status = 0x50;
nkeynes@629
   346
		idereg.count = 0x03;
nkeynes@629
   347
		ide_raise_interrupt();
nkeynes@629
   348
		asic_event( EVENT_IDE_DMA );
nkeynes@629
   349
		break;
nkeynes@342
   350
	    }
nkeynes@152
   351
	}
nkeynes@152
   352
    }
nkeynes@342
   353
    return xfercount;
nkeynes@152
   354
}
nkeynes@152
   355
nkeynes@2
   356
void ide_write_data_pio( uint16_t val ) {
nkeynes@152
   357
    if( idereg.state == IDE_STATE_CMD_WRITE ) {
nkeynes@152
   358
	WRITE_BUFFER(val);
nkeynes@152
   359
	idereg.data_offset+=2;
nkeynes@152
   360
	if( idereg.data_offset >= idereg.data_length ) {
nkeynes@152
   361
	    idereg.state = IDE_STATE_BUSY;
nkeynes@152
   362
	    idereg.status = (idereg.status & ~IDE_STATUS_DRQ) | IDE_STATUS_BSY;
nkeynes@152
   363
	    idereg.data_offset = -1;
nkeynes@152
   364
	    ide_packet_command(data_buffer);
nkeynes@152
   365
	}
nkeynes@152
   366
    } else if( idereg.state == IDE_STATE_PIO_WRITE ) {
nkeynes@152
   367
	WRITE_BUFFER(val);
nkeynes@493
   368
	idereg.data_offset +=2;
nkeynes@152
   369
	if( idereg.data_offset >= idereg.data_length ) {
nkeynes@493
   370
	    idereg.state = IDE_STATE_IDLE;
nkeynes@493
   371
	    idereg.status &= ~IDE_STATUS_DRQ;
nkeynes@152
   372
	    idereg.data_offset = -1;
nkeynes@493
   373
	    idereg.count = 3; /* complete */
nkeynes@493
   374
	    ide_raise_interrupt();
nkeynes@493
   375
	    ide_write_buffer( data_buffer, idereg.data_length );
nkeynes@152
   376
	}
nkeynes@2
   377
    }
nkeynes@2
   378
}
nkeynes@2
   379
nkeynes@2
   380
void ide_write_control( uint8_t val ) {
nkeynes@125
   381
    if( IS_IDE_IRQ_ENABLED() ) {
nkeynes@125
   382
	if( (val & 0x02) != 0 && idereg.intrq_pending != 0 )
nkeynes@125
   383
	    asic_clear_event( EVENT_IDE );
nkeynes@125
   384
    } else {
nkeynes@125
   385
	if( (val & 0x02) == 0 && idereg.intrq_pending != 0 )
nkeynes@125
   386
	    asic_event( EVENT_IDE );
nkeynes@125
   387
    }
nkeynes@125
   388
    idereg.control = val;
nkeynes@2
   389
}
nkeynes@2
   390
nkeynes@2
   391
void ide_write_command( uint8_t val ) {
nkeynes@125
   392
    ide_clear_interrupt();
nkeynes@2
   393
    idereg.command = val;
nkeynes@2
   394
    switch( val ) {
nkeynes@240
   395
    case IDE_CMD_NOP: /* Effectively an "abort" */
nkeynes@240
   396
	idereg.state = IDE_STATE_IDLE;
nkeynes@240
   397
	idereg.status = 0x51;
nkeynes@240
   398
	idereg.error = 0x04;
nkeynes@240
   399
	idereg.data_offset = -1;
nkeynes@240
   400
	ide_raise_interrupt();
nkeynes@240
   401
	return;
nkeynes@39
   402
    case IDE_CMD_RESET_DEVICE:
nkeynes@39
   403
	ide_reset();
nkeynes@39
   404
	break;
nkeynes@39
   405
    case IDE_CMD_PACKET:
nkeynes@152
   406
	ide_start_command_packet_write();
nkeynes@39
   407
	break;
nkeynes@39
   408
    case IDE_CMD_SET_FEATURE:
nkeynes@39
   409
	switch( idereg.feature ) {
nkeynes@47
   410
	case IDE_FEAT_SET_TRANSFER_MODE:
nkeynes@47
   411
	    switch( idereg.count & 0xF8 ) {
nkeynes@47
   412
	    case IDE_XFER_PIO:
nkeynes@47
   413
		INFO( "Set PIO default mode: %d", idereg.count&0x07 );
nkeynes@47
   414
		break;
nkeynes@47
   415
	    case IDE_XFER_PIO_FLOW:
nkeynes@47
   416
		INFO( "Set PIO Flow-control mode: %d", idereg.count&0x07 );
nkeynes@47
   417
		break;
nkeynes@47
   418
	    case IDE_XFER_MULTI_DMA:
nkeynes@47
   419
		INFO( "Set Multiword DMA mode: %d", idereg.count&0x07 );
nkeynes@47
   420
		break;
nkeynes@47
   421
	    case IDE_XFER_ULTRA_DMA:
nkeynes@47
   422
		INFO( "Set Ultra DMA mode: %d", idereg.count&0x07 );
nkeynes@47
   423
		break;
nkeynes@47
   424
	    default:
nkeynes@47
   425
		INFO( "Setting unknown transfer mode: %02X", idereg.count );
nkeynes@47
   426
		break;
nkeynes@47
   427
	    }
nkeynes@47
   428
	    break;
nkeynes@39
   429
	default:
nkeynes@39
   430
	    WARN( "IDE: unimplemented feature: %02X", idereg.feature );
nkeynes@39
   431
	}
nkeynes@254
   432
	idereg.status = 0x50;
nkeynes@254
   433
	idereg.error = 0x00;
nkeynes@254
   434
	idereg.lba1 = 0x00;
nkeynes@254
   435
	idereg.lba2 = 0x00;
nkeynes@256
   436
	ide_raise_interrupt();
nkeynes@39
   437
	break;
nkeynes@39
   438
    default:
nkeynes@39
   439
	WARN( "IDE: Unimplemented command: %02X", val );
nkeynes@2
   440
    }
nkeynes@2
   441
}
nkeynes@2
   442
nkeynes@342
   443
uint8_t ide_get_drive_status( void )
nkeynes@342
   444
{
nkeynes@342
   445
    if( gdrom_disc == NULL ) {
nkeynes@342
   446
	return IDE_DISC_NONE;
nkeynes@342
   447
    } else {
nkeynes@342
   448
	return gdrom_disc->drive_status(gdrom_disc);
nkeynes@342
   449
    }
nkeynes@342
   450
}
nkeynes@342
   451
nkeynes@342
   452
#define REQUIRE_DISC() if( gdrom_disc == NULL ) { ide_set_packet_result( PKT_ERR_NODISC ); return; }
nkeynes@342
   453
nkeynes@342
   454
/**
nkeynes@342
   455
 * Read the next sector from the active read, if any
nkeynes@342
   456
 */
nkeynes@342
   457
static void ide_read_next_sector( void )
nkeynes@342
   458
{
nkeynes@422
   459
    uint32_t sector_size;
nkeynes@342
   460
    REQUIRE_DISC();
nkeynes@342
   461
    gdrom_error_t status = 
nkeynes@493
   462
	gdrom_disc->read_sector( gdrom_disc, idereg.current_lba, idereg.current_mode, 
nkeynes@342
   463
				 data_buffer, &sector_size );
nkeynes@342
   464
    if( status != PKT_ERR_OK ) {
nkeynes@342
   465
	ide_set_packet_result( status );
nkeynes@493
   466
	idereg.gdrom_sense[5] = (idereg.current_lba >> 16) & 0xFF;
nkeynes@493
   467
	idereg.gdrom_sense[6] = (idereg.current_lba >> 8) & 0xFF;
nkeynes@493
   468
	idereg.gdrom_sense[7] = idereg.current_lba & 0xFF;
nkeynes@342
   469
	WARN( " => Read CD returned sense key %02X, %02X", status & 0xFF, status >> 8 );
nkeynes@342
   470
    } else {
nkeynes@493
   471
	idereg.current_lba++;
nkeynes@342
   472
	idereg.sectors_left--;
nkeynes@342
   473
	ide_start_read( sector_size, (idereg.feature & IDE_FEAT_DMA) ? TRUE : FALSE );
nkeynes@342
   474
    }
nkeynes@342
   475
}
nkeynes@342
   476
nkeynes@142
   477
/**
nkeynes@142
   478
 * Execute a packet command. This particular method is responsible for parsing
nkeynes@142
   479
 * the command buffers (12 bytes), and generating the appropriate responses, 
nkeynes@142
   480
 * although the actual implementation is mostly delegated to gdrom.c
nkeynes@142
   481
 */
nkeynes@125
   482
void ide_packet_command( unsigned char *cmd )
nkeynes@125
   483
{
nkeynes@422
   484
    uint32_t length;
nkeynes@143
   485
    uint32_t lba, status;
nkeynes@125
   486
nkeynes@125
   487
    /* Okay we have the packet in the command buffer */
nkeynes@166
   488
    INFO( "ATAPI packet: %02X %02X %02X %02X  %02X %02X %02X %02X  %02X %02X %02X %02X", 
nkeynes@166
   489
	  cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], cmd[5], cmd[6], cmd[7],
nkeynes@166
   490
	  cmd[8], cmd[9], cmd[10], cmd[11] );
nkeynes@254
   491
nkeynes@254
   492
    if( cmd[0] != PKT_CMD_SENSE && idereg.was_reset ) {
nkeynes@254
   493
	ide_set_packet_result( PKT_ERR_RESET );
nkeynes@254
   494
	idereg.was_reset = FALSE;
nkeynes@254
   495
	return;
nkeynes@254
   496
    }
nkeynes@254
   497
nkeynes@125
   498
    switch( cmd[0] ) {
nkeynes@142
   499
    case PKT_CMD_TEST_READY:
nkeynes@342
   500
	REQUIRE_DISC();
nkeynes@342
   501
	ide_set_packet_result( 0 );
nkeynes@342
   502
	ide_raise_interrupt();
nkeynes@342
   503
	idereg.status = 0x50;
nkeynes@142
   504
	break;
nkeynes@493
   505
    case PKT_CMD_MODE_SENSE:
nkeynes@140
   506
	lba = cmd[2];
nkeynes@493
   507
	if( lba >= GDROM_MODE_LENGTH ) {
nkeynes@142
   508
	    ide_set_error(PKT_ERR_BADFIELD);
nkeynes@158
   509
	} else {
nkeynes@158
   510
	    length = cmd[4];
nkeynes@493
   511
	    if( lba+length > GDROM_MODE_LENGTH )
nkeynes@493
   512
		length = GDROM_MODE_LENGTH - lba;
nkeynes@493
   513
	    memcpy( data_buffer, idereg.gdrom_mode + lba, length );
nkeynes@342
   514
	    ide_start_packet_read( length, 0 );
nkeynes@140
   515
	}
nkeynes@125
   516
	break;
nkeynes@493
   517
    case PKT_CMD_MODE_SELECT:
nkeynes@493
   518
	lba = cmd[2];
nkeynes@493
   519
	if( lba >= GDROM_MODE_LENGTH ) {
nkeynes@493
   520
	    ide_set_error(PKT_ERR_BADFIELD);
nkeynes@493
   521
	} else {
nkeynes@493
   522
	    length = cmd[4];
nkeynes@493
   523
	    if( lba+length > GDROM_MODE_LENGTH )
nkeynes@493
   524
		length = GDROM_MODE_LENGTH - lba;
nkeynes@493
   525
	    idereg.current_lba = lba;
nkeynes@493
   526
	    ide_start_packet_write( length, 0 );
nkeynes@493
   527
	}
nkeynes@493
   528
	break;
nkeynes@142
   529
    case PKT_CMD_SENSE:
nkeynes@142
   530
	length = cmd[4];
nkeynes@142
   531
	if( length > 10 )
nkeynes@142
   532
	    length = 10;
nkeynes@152
   533
	memcpy( data_buffer, idereg.gdrom_sense, length );
nkeynes@342
   534
	ide_start_packet_read( length, 0 );
nkeynes@142
   535
	break;
nkeynes@125
   536
    case PKT_CMD_READ_TOC:
nkeynes@342
   537
	REQUIRE_DISC();
nkeynes@142
   538
	length = (cmd[3]<<8) | cmd[4];
nkeynes@142
   539
	if( length > sizeof(struct gdrom_toc) )
nkeynes@142
   540
	    length = sizeof(struct gdrom_toc);
nkeynes@152
   541
nkeynes@342
   542
	status = gdrom_disc->read_toc( gdrom_disc, data_buffer );
nkeynes@152
   543
	if( status != PKT_ERR_OK ) {
nkeynes@152
   544
	    ide_set_packet_result( status );
nkeynes@158
   545
	} else {
nkeynes@342
   546
	    ide_start_packet_read( length, 0 );
nkeynes@152
   547
	}
nkeynes@125
   548
	break;
nkeynes@158
   549
    case PKT_CMD_SESSION_INFO:
nkeynes@342
   550
	REQUIRE_DISC();
nkeynes@149
   551
	length = cmd[4];
nkeynes@149
   552
	if( length > 6 )
nkeynes@149
   553
	    length = 6;
nkeynes@342
   554
	status = gdrom_disc->read_session( gdrom_disc, cmd[2], data_buffer );
nkeynes@152
   555
	if( status != PKT_ERR_OK ) {
nkeynes@152
   556
	    ide_set_packet_result( status );
nkeynes@158
   557
	} else {
nkeynes@342
   558
	    ide_start_packet_read( length, 0 );
nkeynes@152
   559
	}
nkeynes@149
   560
	break;
nkeynes@342
   561
    case PKT_CMD_PLAY_AUDIO:
nkeynes@342
   562
	REQUIRE_DISC();
nkeynes@250
   563
	ide_set_packet_result( 0 );
nkeynes@250
   564
	ide_raise_interrupt();
nkeynes@250
   565
	idereg.status = 0x50;
nkeynes@250
   566
	break;
nkeynes@125
   567
    case PKT_CMD_READ_SECTOR:
nkeynes@342
   568
	REQUIRE_DISC();
nkeynes@493
   569
	idereg.current_lba = cmd[2] << 16 | cmd[3] << 8 | cmd[4];
nkeynes@342
   570
	idereg.sectors_left = cmd[8] << 16 | cmd[9] << 8 | cmd[10]; /* blocks */
nkeynes@493
   571
	idereg.current_mode = cmd[1];
nkeynes@342
   572
	ide_read_next_sector();
nkeynes@125
   573
	break;
nkeynes@149
   574
    case PKT_CMD_SPIN_UP:
nkeynes@342
   575
	REQUIRE_DISC();
nkeynes@149
   576
	/* do nothing? */
nkeynes@158
   577
	ide_set_packet_result( PKT_ERR_OK );
nkeynes@158
   578
	ide_raise_interrupt();
nkeynes@158
   579
	break;
nkeynes@245
   580
    case PKT_CMD_STATUS:
nkeynes@342
   581
	REQUIRE_DISC();
nkeynes@245
   582
	length = cmd[4];
nkeynes@342
   583
	switch( cmd[1] ) {
nkeynes@342
   584
	case 0:
nkeynes@342
   585
	    if( length > sizeof(gdrom_status) ) {
nkeynes@342
   586
		length = sizeof(gdrom_status);
nkeynes@245
   587
	    }
nkeynes@342
   588
	    memcpy( data_buffer, gdrom_status, length );
nkeynes@342
   589
	    ide_start_packet_read( length, 0 );
nkeynes@342
   590
	    break;
nkeynes@342
   591
	case 1:
nkeynes@342
   592
	    if( length > 14 ) {
nkeynes@342
   593
		length = 14;
nkeynes@342
   594
	    }
nkeynes@493
   595
	    gdrom_disc->read_position( gdrom_disc, idereg.current_lba, data_buffer );
nkeynes@342
   596
	    data_buffer[0] = 0x00;
nkeynes@342
   597
	    data_buffer[1] = 0x15; /* audio status ? */
nkeynes@342
   598
	    data_buffer[2] = 0x00;
nkeynes@342
   599
	    data_buffer[3] = 0x0E;
nkeynes@342
   600
	    ide_start_packet_read( length, 0 );
nkeynes@342
   601
	    break;
nkeynes@245
   602
	}
nkeynes@245
   603
	break;
nkeynes@158
   604
    case PKT_CMD_71:
nkeynes@158
   605
	/* This is a weird one. As far as I can tell it returns random garbage
nkeynes@158
   606
	 * (and not even the same length each time, never mind the same data).
nkeynes@158
   607
	 * For sake of something to do, it returns the results from a test dump
nkeynes@158
   608
	 */
nkeynes@342
   609
	REQUIRE_DISC();
nkeynes@158
   610
	memcpy( data_buffer, gdrom_71, sizeof(gdrom_71) );
nkeynes@342
   611
	ide_start_packet_read( sizeof(gdrom_71), 0 );
nkeynes@149
   612
	break;
nkeynes@142
   613
    default:
nkeynes@152
   614
	ide_set_packet_result( PKT_ERR_BADCMD ); /* Invalid command */
nkeynes@142
   615
	return;
nkeynes@125
   616
    }
nkeynes@493
   617
    idereg.last_packet_command = cmd[0];
nkeynes@125
   618
}
nkeynes@493
   619
nkeynes@493
   620
void ide_write_buffer( unsigned char *data, uint32_t length )
nkeynes@493
   621
{
nkeynes@493
   622
    switch( idereg.last_packet_command ) {
nkeynes@493
   623
    case PKT_CMD_MODE_SELECT:
nkeynes@493
   624
	if( idereg.current_lba < 10 ) {
nkeynes@493
   625
	    if( idereg.current_lba + length > 10 ) {
nkeynes@493
   626
		length = 10 - idereg.current_lba;
nkeynes@493
   627
	    }
nkeynes@493
   628
	    memcpy( idereg.gdrom_mode + idereg.current_lba, data, length );
nkeynes@493
   629
	}
nkeynes@493
   630
	break;
nkeynes@493
   631
    default:
nkeynes@493
   632
	WARN( "Don't know what to do with received data buffer for command %02X", idereg.last_packet_command );
nkeynes@493
   633
    }
nkeynes@493
   634
}
.