filename | src/gdrom/ide.c |
changeset | 125:49bf45f8210a |
prev | 47:da09bcb7ce69 |
next | 138:afabd7e6d26d |
author | nkeynes |
date | Wed Mar 22 14:29:02 2006 +0000 (18 years ago) |
permissions | -rw-r--r-- |
last change | Rename IDE DMA registers appropriately Remove forced irq hack Add correct irq handling for IDE Miscellaneous WIP for the GD-rom drive |
file | annotate | diff | log | raw |
1.1 --- a/src/gdrom/ide.c Tue Dec 27 12:41:33 2005 +00001.2 +++ b/src/gdrom/ide.c Wed Mar 22 14:29:02 2006 +00001.3 @@ -1,5 +1,5 @@1.4 /**1.5 - * $Id: ide.c,v 1.7 2005-12-27 12:41:33 nkeynes Exp $1.6 + * $Id: ide.c,v 1.8 2006-03-22 14:29:02 nkeynes Exp $1.7 *1.8 * IDE interface implementation1.9 *1.10 @@ -20,7 +20,9 @@1.12 #include <stdlib.h>1.13 #include "dream.h"1.14 +#include "asic.h"1.15 #include "gdrom/ide.h"1.16 +#include "gdrom/gdrom.h"1.18 #define MAX_WRITE_BUF 4096;1.20 @@ -32,16 +34,18 @@1.22 struct ide_registers idereg;1.24 -static char command_buffer[12];1.25 +static unsigned char command_buffer[12];1.27 /* "\0\0\0\0\xb4\x19\0\0\x08SE REV 6.42990316" */1.28 -char gdrom_ident[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0xb4, 0x19, 0x00,1.29 +unsigned char gdrom_ident[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0xb4, 0x19, 0x00,1.30 0x00, 0x08, 0x53, 0x45, 0x20, 0x20, 0x20, 0x20,1.31 0x20, 0x20, 0x52, 0x65, 0x76, 0x20, 0x36, 0x2e,1.32 0x34, 0x32, 0x39, 0x39, 0x30, 0x33, 0x31, 0x36 };1.35 -void set_write_buffer( char *buf, int len )1.36 +gdrom_disc_t gdrom_disc = NULL;1.37 +1.38 +static void ide_set_write_buffer( unsigned char *buf, int len )1.39 {1.40 idereg.status |= IDE_ST_DATA;1.41 idereg.data = buf;1.42 @@ -50,7 +54,7 @@1.43 idereg.readptr = NULL;1.44 }1.46 -void set_read_buffer( char *buf, int len )1.47 +static void ide_set_read_buffer( unsigned char *buf, int len, int blocksize )1.48 {1.49 idereg.status |= IDE_ST_DATA;1.50 idereg.data = buf;1.51 @@ -59,11 +63,31 @@1.52 idereg.writeptr = NULL;1.53 idereg.lba1 = len&0xFF;1.54 idereg.lba2 = len>>8;1.55 + idereg.blocksize = idereg.blockleft = blocksize;1.56 }1.58 -void ide_clear_interrupt( void )1.59 +static void ide_raise_interrupt( void )1.60 {1.61 - /* TODO */1.62 + if( idereg.intrq_pending == 0 ) {1.63 + idereg.intrq_pending = 1;1.64 + if( IS_IDE_IRQ_ENABLED() )1.65 + asic_event( EVENT_IDE );1.66 + }1.67 +}1.68 +1.69 +static void ide_clear_interrupt( void )1.70 +{1.71 + if( idereg.intrq_pending != 0 ) {1.72 + idereg.intrq_pending = 0;1.73 + if( IS_IDE_IRQ_ENABLED() )1.74 + asic_clear_event( EVENT_IDE );1.75 + }1.76 +}1.77 +1.78 +static void ide_set_error( int error_code )1.79 +{1.80 + idereg.status = 0x51;1.81 + idereg.error = error_code;1.82 }1.84 void ide_init( void )1.85 @@ -76,13 +100,20 @@1.86 ide_clear_interrupt();1.87 idereg.error = 0x01;1.88 idereg.count = 0x01;1.89 - idereg.lba0 = 0x21;1.90 + idereg.lba0 = /* 0x21; */ 0x81;1.91 idereg.lba1 = 0x14;1.92 idereg.lba2 = 0xeb;1.93 idereg.feature = 0; /* Indeterminate really */1.94 idereg.status = 0x00;1.95 idereg.device = 0x00;1.96 - idereg.disc = IDE_DISC_GDROM | IDE_DISC_READY;1.97 + idereg.disc = (gdrom_disc == NULL ? IDE_DISC_NONE : (IDE_DISC_CDROM|IDE_DISC_READY));1.98 +}1.99 +1.100 +uint8_t ide_read_status( void )1.101 +{1.102 + if( (idereg.status & IDE_ST_BUSY) == 0 )1.103 + ide_clear_interrupt();1.104 + return idereg.status;1.105 }1.107 uint16_t ide_read_data_pio( void ) {1.108 @@ -90,9 +121,13 @@1.109 return 0xFFFF;1.110 uint16_t rv = *idereg.readptr++;1.111 idereg.datalen-=2;1.112 + idereg.blockleft-=2;1.113 if( idereg.datalen <=0 ) {1.114 idereg.readptr = NULL;1.115 idereg.status &= ~IDE_ST_DATA;1.116 + } else if( idereg.blockleft <= 0 ) {1.117 + ide_raise_interrupt();1.118 + idereg.blockleft = idereg.blocksize;1.119 }1.120 return rv;1.121 }1.122 @@ -103,26 +138,33 @@1.123 *idereg.writeptr++ = val;1.124 idereg.datalen-=2;1.125 if( idereg.datalen <= 0 ) {1.126 + int len = ((unsigned char *)idereg.writeptr) - idereg.data;1.127 idereg.writeptr = NULL;1.128 idereg.status &= ~IDE_ST_DATA;1.129 - ide_write_buffer( idereg.data );1.130 + ide_write_buffer( idereg.data, len );1.131 }1.132 }1.134 void ide_write_control( uint8_t val ) {1.135 - /* TODO: In theory we can cause a soft-reset here, but the DC doesn't1.136 - * appear to support it.1.137 - */1.138 + if( IS_IDE_IRQ_ENABLED() ) {1.139 + if( (val & 0x02) != 0 && idereg.intrq_pending != 0 )1.140 + asic_clear_event( EVENT_IDE );1.141 + } else {1.142 + if( (val & 0x02) == 0 && idereg.intrq_pending != 0 )1.143 + asic_event( EVENT_IDE );1.144 + }1.145 + idereg.control = val;1.146 }1.148 void ide_write_command( uint8_t val ) {1.149 + ide_clear_interrupt();1.150 idereg.command = val;1.151 switch( val ) {1.152 case IDE_CMD_RESET_DEVICE:1.153 ide_reset();1.154 break;1.155 case IDE_CMD_PACKET:1.156 - set_write_buffer(command_buffer,12);1.157 + ide_set_write_buffer(command_buffer,12);1.158 break;1.159 case IDE_CMD_SET_FEATURE:1.160 switch( idereg.feature ) {1.161 @@ -148,6 +190,7 @@1.162 default:1.163 WARN( "IDE: unimplemented feature: %02X", idereg.feature );1.164 }1.165 + ide_raise_interrupt( );1.166 break;1.167 default:1.168 WARN( "IDE: Unimplemented command: %02X", val );1.169 @@ -155,24 +198,65 @@1.170 idereg.status |= IDE_ST_READY | IDE_ST_SERV;1.171 }1.173 -void ide_write_buffer( char *data ) {1.174 - uint16_t length;1.175 +void ide_packet_command( unsigned char *cmd )1.176 +{1.177 + uint32_t length;1.178 + uint32_t lba;1.179 + int blocksize = idereg.lba1 + (idereg.lba2<<8);1.180 +1.181 + ide_raise_interrupt( );1.182 + /* Okay we have the packet in the command buffer */1.183 + WARN( "ATAPI: Received Packet command: %02X", cmd[0] );1.184 + fwrite_dump( (unsigned char *)cmd, 12, stderr );1.185 + switch( cmd[0] ) {1.186 + case PKT_CMD_IDENTIFY:1.187 + /* NB: Bios sets cmd[4] = 0x08, no idea what this is for;1.188 + * different values here appear to have no effect.1.189 + */1.190 + length = *((uint16_t*)(cmd+2));1.191 + if( length > sizeof(gdrom_ident) )1.192 + length = sizeof(gdrom_ident);1.193 + ide_set_read_buffer(gdrom_ident, length, blocksize);1.194 + break;1.195 + case PKT_CMD_READ_TOC:1.196 +1.197 + break;1.198 + case PKT_CMD_READ_SECTOR:1.199 + lba = cmd[2] << 16 | cmd[3] << 8 | cmd[4];1.200 + length = cmd[8] << 16 | cmd[9] << 8 | cmd[10]; /* blocks */1.201 + if( gdrom_disc == NULL ) {1.202 + ide_set_error( 0x50 );1.203 + return;1.204 + }1.205 + /*1.206 + if( gdrom_disc->read_data_sectors( lba, length ) == FALSE ) {1.207 + ide_set_error( 0x50 );1.208 + return;1.209 + }1.210 +1.211 + */1.212 + break;1.213 + }1.214 +}1.215 +1.216 +void ide_write_buffer( unsigned char *data, int datalen ) {1.217 switch( idereg.command ) {1.218 case IDE_CMD_PACKET:1.219 - /* Okay we have the packet in the command buffer */1.220 - WARN( "ATAPI: Received Packet command: %02X", data[0] );1.221 -1.222 - switch( command_buffer[0] ) {1.223 - case PKT_CMD_IDENTIFY:1.224 - /* NB: Bios sets data[4] = 0x08, no idea what this is for;1.225 - * different values here appear to have no effect.1.226 - */1.227 - length = *((uint16_t*)(data+2));1.228 - if( length > sizeof(gdrom_ident) )1.229 - length = sizeof(gdrom_ident);1.230 - set_read_buffer(gdrom_ident, length);1.231 - break;1.232 - }1.233 + ide_packet_command( data );1.234 break;1.235 }1.236 }1.237 +1.238 +/**1.239 + * DMA read request1.240 + *1.241 + * This method is called from the ASIC side when a DMA read request is1.242 + * initiated. If there is a pending DMA transfer already, we copy the1.243 + * data immediately, otherwise we record the DMA buffer for use when we1.244 + * get to actually doing the transfer.1.245 + */1.246 +void ide_dma_read_req( uint32_t addr, uint32_t length )1.247 +{1.248 +1.249 +1.250 +}
.