filename | src/maple/maple.c |
changeset | 144:7f0714e89aaa |
prev | 121:795fec623ce9 |
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author | nkeynes |
date | Mon May 15 08:28:52 2006 +0000 (16 years ago) |
permissions | -rw-r--r-- |
last change | Rename video_driver to display_driver Add input source to display Implement configuration file support Hook controllers up to configuration |
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nkeynes@31 | 1 | /** |
nkeynes@144 | 2 | * $Id: maple.c,v 1.8 2006-05-15 08:28:52 nkeynes Exp $ |
nkeynes@31 | 3 | * |
nkeynes@31 | 4 | * Implements the core Maple bus, including DMA transfers to and from the bus. |
nkeynes@31 | 5 | * |
nkeynes@31 | 6 | * Copyright (c) 2005 Nathan Keynes. |
nkeynes@31 | 7 | * |
nkeynes@31 | 8 | * This program is free software; you can redistribute it and/or modify |
nkeynes@31 | 9 | * it under the terms of the GNU General Public License as published by |
nkeynes@31 | 10 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@31 | 11 | * (at your option) any later version. |
nkeynes@31 | 12 | * |
nkeynes@31 | 13 | * This program is distributed in the hope that it will be useful, |
nkeynes@31 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@31 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@31 | 16 | * GNU General Public License for more details. |
nkeynes@31 | 17 | */ |
nkeynes@35 | 18 | #define MODULE maple_module |
nkeynes@31 | 19 | |
nkeynes@1 | 20 | #include <assert.h> |
nkeynes@1 | 21 | #include "dream.h" |
nkeynes@1 | 22 | #include "mem.h" |
nkeynes@1 | 23 | #include "asic.h" |
nkeynes@1 | 24 | #include "maple.h" |
nkeynes@1 | 25 | |
nkeynes@15 | 26 | void maple_init( void ); |
nkeynes@15 | 27 | |
nkeynes@15 | 28 | struct dreamcast_module maple_module = { "Maple", maple_init, NULL, NULL, NULL, |
nkeynes@23 | 29 | NULL, NULL, NULL }; |
nkeynes@15 | 30 | |
nkeynes@144 | 31 | struct maple_device_class *maple_device_classes[] = { &controller_class, NULL }; |
nkeynes@144 | 32 | |
nkeynes@15 | 33 | void maple_init( void ) |
nkeynes@15 | 34 | { |
nkeynes@15 | 35 | |
nkeynes@15 | 36 | } |
nkeynes@15 | 37 | |
nkeynes@144 | 38 | maple_device_t maple_new_device( const gchar *name ) |
nkeynes@144 | 39 | { |
nkeynes@144 | 40 | int i; |
nkeynes@144 | 41 | for( i=0; maple_device_classes[i] != NULL; i++ ) { |
nkeynes@144 | 42 | if( g_strcasecmp(maple_device_classes[i]->name, name ) == 0 ) |
nkeynes@144 | 43 | return maple_device_classes[i]->new_device(); |
nkeynes@144 | 44 | } |
nkeynes@144 | 45 | return NULL; |
nkeynes@144 | 46 | } |
nkeynes@144 | 47 | |
nkeynes@144 | 48 | dreamcast_config_entry_t maple_get_device_config( maple_device_t dev ) |
nkeynes@144 | 49 | { |
nkeynes@144 | 50 | if( dev->get_config == NULL ) |
nkeynes@144 | 51 | return NULL; |
nkeynes@144 | 52 | return dev->get_config(dev); |
nkeynes@144 | 53 | } |
nkeynes@144 | 54 | |
nkeynes@2 | 55 | /** |
nkeynes@2 | 56 | * Input data looks like this: |
nkeynes@2 | 57 | * 0: transfer control word |
nkeynes@2 | 58 | * 0: length of data in words (not including 3 word header) |
nkeynes@2 | 59 | * 1: low bit = lightgun mode |
nkeynes@2 | 60 | * 2: low 2 bits = port # (0..3) |
nkeynes@2 | 61 | * 3: 0x80 = last packet, 0x00 = normal packet |
nkeynes@2 | 62 | * 4: output buffer address |
nkeynes@2 | 63 | * 8: Command word |
nkeynes@2 | 64 | * 8: command code |
nkeynes@2 | 65 | * 9: destination address |
nkeynes@2 | 66 | * 10: source address |
nkeynes@2 | 67 | * 11: length of data in words (not including 3 word header) |
nkeynes@2 | 68 | * 12: command-specific data |
nkeynes@2 | 69 | */ |
nkeynes@2 | 70 | |
nkeynes@2 | 71 | /** |
nkeynes@2 | 72 | * array is [port][subperipheral], so [0][0] is main peripheral on port A, |
nkeynes@2 | 73 | * [1][2] is the second subperipheral on port B and so on. |
nkeynes@2 | 74 | */ |
nkeynes@2 | 75 | maple_device_t maple_devices[4][6]; |
nkeynes@2 | 76 | int maple_periph_mask[4]; |
nkeynes@2 | 77 | #define GETBYTE(n) ((uint32_t)(buf[n])) |
nkeynes@2 | 78 | #define GETWORD(n) (*((uint32_t *)(buf+(n)))) |
nkeynes@2 | 79 | #define PUTBYTE(n,x) (buf[n] = (char)x) |
nkeynes@2 | 80 | #define PUTWORD(n,x) (*((uint32_t *)(return_buf+(n))) = (x)) |
nkeynes@2 | 81 | |
nkeynes@144 | 82 | maple_device_t maple_get_device( unsigned int port, unsigned int periph ) { |
nkeynes@144 | 83 | if( port >= 4 ) |
nkeynes@144 | 84 | return NULL; |
nkeynes@144 | 85 | if( periph >= 6 ) |
nkeynes@144 | 86 | return NULL; |
nkeynes@144 | 87 | return maple_devices[port][periph]; |
nkeynes@144 | 88 | } |
nkeynes@144 | 89 | |
nkeynes@1 | 90 | void maple_handle_buffer( uint32_t address ) { |
nkeynes@2 | 91 | unsigned char *buf = (unsigned char *)mem_get_region(address); |
nkeynes@1 | 92 | if( buf == NULL ) { |
nkeynes@1 | 93 | ERROR( "Invalid or unmapped buffer passed to maple (0x%08X)", address ); |
nkeynes@1 | 94 | } else { |
nkeynes@2 | 95 | unsigned int last = 0; |
nkeynes@2 | 96 | int i = 0, count; |
nkeynes@2 | 97 | for( count=0; !last; count++ ) { |
nkeynes@2 | 98 | unsigned int port, length, gun, periph, periph_id, out_length; |
nkeynes@2 | 99 | unsigned int cmd, recv_addr, send_addr; |
nkeynes@2 | 100 | uint32_t return_addr; |
nkeynes@2 | 101 | unsigned char *return_buf; |
nkeynes@1 | 102 | |
nkeynes@2 | 103 | last = GETBYTE(3) & 0x80; /* indicates last packet */ |
nkeynes@2 | 104 | port = GETBYTE(2) & 0x03; |
nkeynes@2 | 105 | gun = GETBYTE(1) & 0x01; |
nkeynes@2 | 106 | length = GETBYTE(0) & 0xFF; |
nkeynes@2 | 107 | return_addr = GETWORD(4); |
nkeynes@2 | 108 | if( return_addr == 0 ) { |
nkeynes@2 | 109 | /* ERROR */ |
nkeynes@2 | 110 | } |
nkeynes@2 | 111 | return_buf = mem_get_region(return_addr); |
nkeynes@2 | 112 | cmd = GETBYTE(8); |
nkeynes@2 | 113 | recv_addr = GETBYTE(9); |
nkeynes@2 | 114 | send_addr = GETBYTE(10); |
nkeynes@2 | 115 | /* Sanity checks */ |
nkeynes@2 | 116 | if( GETBYTE(11) != length || |
nkeynes@2 | 117 | send_addr != (port<<6) || |
nkeynes@2 | 118 | recv_addr >> 6 != port || |
nkeynes@2 | 119 | return_buf == NULL ) { |
nkeynes@2 | 120 | /* ERROR */ |
nkeynes@2 | 121 | } |
nkeynes@2 | 122 | periph = 0; |
nkeynes@2 | 123 | periph_id = recv_addr & 0x3F; |
nkeynes@2 | 124 | if( periph_id != 0x20 ) { |
nkeynes@2 | 125 | for( i=0;i<5;i++ ) { |
nkeynes@2 | 126 | if( periph_id == (1<<i) ) { |
nkeynes@2 | 127 | periph = i+1; |
nkeynes@2 | 128 | break; |
nkeynes@2 | 129 | } |
nkeynes@2 | 130 | } |
nkeynes@2 | 131 | if( periph == 0 ) { /* Bad setting */ |
nkeynes@2 | 132 | /* ERROR */ |
nkeynes@2 | 133 | } |
nkeynes@2 | 134 | } |
nkeynes@2 | 135 | |
nkeynes@2 | 136 | INFO( "Maple packet %d: Cmd %d on port %d device %d", count, cmd, port, periph ); |
nkeynes@2 | 137 | maple_device_t dev = maple_devices[port][periph]; |
nkeynes@2 | 138 | if( dev == NULL ) { |
nkeynes@2 | 139 | /* no device attached */ |
nkeynes@2 | 140 | *((uint32_t *)return_buf) = -1; |
nkeynes@2 | 141 | } else { |
nkeynes@2 | 142 | int status, func, block; |
nkeynes@2 | 143 | out_length = 0; |
nkeynes@2 | 144 | switch( cmd ) { |
nkeynes@2 | 145 | case MAPLE_CMD_INFO: |
nkeynes@2 | 146 | status = MAPLE_RESP_INFO; |
nkeynes@2 | 147 | memcpy( return_buf+4, dev->ident, 112 ); |
nkeynes@2 | 148 | out_length = 0x1C; |
nkeynes@2 | 149 | break; |
nkeynes@2 | 150 | case MAPLE_CMD_EXT_INFO: |
nkeynes@2 | 151 | status = MAPLE_RESP_EXT_INFO; |
nkeynes@2 | 152 | memcpy( return_buf+4, dev->ident, 192 ); |
nkeynes@2 | 153 | out_length = 0x30; |
nkeynes@2 | 154 | break; |
nkeynes@2 | 155 | case MAPLE_CMD_RESET: |
nkeynes@2 | 156 | if( dev->reset == NULL ) |
nkeynes@2 | 157 | status = MAPLE_RESP_ACK; |
nkeynes@2 | 158 | else status = dev->reset(dev); |
nkeynes@2 | 159 | break; |
nkeynes@2 | 160 | case MAPLE_CMD_SHUTDOWN: |
nkeynes@2 | 161 | if( dev->shutdown == NULL ) |
nkeynes@2 | 162 | status = MAPLE_RESP_ACK; |
nkeynes@2 | 163 | else status = dev->shutdown(dev); |
nkeynes@2 | 164 | break; |
nkeynes@2 | 165 | case MAPLE_CMD_GET_COND: |
nkeynes@2 | 166 | func = GETWORD(12); |
nkeynes@2 | 167 | if( dev->get_condition == NULL ) |
nkeynes@2 | 168 | status = MAPLE_ERR_CMD_UNKNOWN; |
nkeynes@2 | 169 | else status = dev->get_condition(dev, func, |
nkeynes@2 | 170 | return_buf+8, |
nkeynes@2 | 171 | &out_length ); |
nkeynes@121 | 172 | out_length++; |
nkeynes@2 | 173 | if( status == 0 ) { |
nkeynes@2 | 174 | status = MAPLE_RESP_DATA; |
nkeynes@2 | 175 | PUTWORD(4,func); |
nkeynes@2 | 176 | } |
nkeynes@2 | 177 | break; |
nkeynes@2 | 178 | case MAPLE_CMD_SET_COND: |
nkeynes@2 | 179 | func = GETWORD(12); |
nkeynes@2 | 180 | if( dev->set_condition == NULL ) |
nkeynes@2 | 181 | status = MAPLE_ERR_CMD_UNKNOWN; |
nkeynes@2 | 182 | else status = dev->set_condition(dev, func, |
nkeynes@2 | 183 | buf+16, |
nkeynes@2 | 184 | length); |
nkeynes@2 | 185 | if( status == 0 ) |
nkeynes@2 | 186 | status = MAPLE_RESP_ACK; |
nkeynes@2 | 187 | break; |
nkeynes@2 | 188 | case MAPLE_CMD_READ_BLOCK: |
nkeynes@2 | 189 | func = GETWORD(12); |
nkeynes@2 | 190 | block = GETWORD(16); |
nkeynes@2 | 191 | if( dev->read_block == NULL ) |
nkeynes@2 | 192 | status = MAPLE_ERR_CMD_UNKNOWN; |
nkeynes@2 | 193 | else status = dev->read_block(dev, func, block, |
nkeynes@2 | 194 | return_buf+12, |
nkeynes@2 | 195 | &out_length ); |
nkeynes@2 | 196 | if( status == 0 ) { |
nkeynes@2 | 197 | status = MAPLE_RESP_DATA; |
nkeynes@2 | 198 | PUTWORD(4,func); |
nkeynes@2 | 199 | PUTWORD(8,block); |
nkeynes@2 | 200 | } |
nkeynes@2 | 201 | break; |
nkeynes@2 | 202 | case MAPLE_CMD_WRITE_BLOCK: |
nkeynes@2 | 203 | func = GETWORD(12); |
nkeynes@2 | 204 | block = GETWORD(16); |
nkeynes@2 | 205 | if( dev->write_block == NULL ) |
nkeynes@2 | 206 | status = MAPLE_ERR_CMD_UNKNOWN; |
nkeynes@2 | 207 | else { |
nkeynes@2 | 208 | status = dev->write_block(dev, func, block, |
nkeynes@2 | 209 | buf+20, length); |
nkeynes@2 | 210 | if( status == 0 ) |
nkeynes@2 | 211 | status = MAPLE_RESP_ACK; |
nkeynes@2 | 212 | } |
nkeynes@2 | 213 | break; |
nkeynes@2 | 214 | default: |
nkeynes@2 | 215 | status = MAPLE_ERR_CMD_UNKNOWN; |
nkeynes@2 | 216 | } |
nkeynes@2 | 217 | return_buf[0] = status; |
nkeynes@2 | 218 | return_buf[1] = send_addr; |
nkeynes@2 | 219 | return_buf[2] = recv_addr; |
nkeynes@2 | 220 | if( periph == 0 ) |
nkeynes@2 | 221 | return_buf[2] |= maple_periph_mask[port]; |
nkeynes@2 | 222 | return_buf[3] = out_length; |
nkeynes@2 | 223 | } |
nkeynes@2 | 224 | buf += 12 + (length<<2); |
nkeynes@2 | 225 | } |
nkeynes@2 | 226 | asic_event( EVENT_MAPLE_DMA ); |
nkeynes@1 | 227 | } |
nkeynes@1 | 228 | } |
nkeynes@2 | 229 | |
nkeynes@2 | 230 | void maple_attach_device( maple_device_t dev, unsigned int port, |
nkeynes@2 | 231 | unsigned int periph ) { |
nkeynes@2 | 232 | assert( port < 4 ); |
nkeynes@2 | 233 | assert( periph < 6 ); |
nkeynes@2 | 234 | |
nkeynes@2 | 235 | if( maple_devices[port][periph] != NULL ) { |
nkeynes@2 | 236 | /* Detach existing peripheral first */ |
nkeynes@2 | 237 | maple_detach_device( port, periph ); |
nkeynes@2 | 238 | } |
nkeynes@2 | 239 | |
nkeynes@2 | 240 | maple_devices[port][periph] = dev; |
nkeynes@2 | 241 | if( periph != 0 ) |
nkeynes@2 | 242 | maple_periph_mask[port] |= (1<<(periph-1)); |
nkeynes@2 | 243 | else maple_periph_mask[port] |= 0x20; |
nkeynes@2 | 244 | if( dev->attach != NULL ) { |
nkeynes@2 | 245 | dev->attach( dev ); |
nkeynes@2 | 246 | } |
nkeynes@2 | 247 | } |
nkeynes@2 | 248 | |
nkeynes@2 | 249 | void maple_detach_device( unsigned int port, unsigned int periph ) { |
nkeynes@2 | 250 | assert( port < 4 ); |
nkeynes@2 | 251 | assert( periph < 6 ); |
nkeynes@2 | 252 | |
nkeynes@2 | 253 | maple_device_t dev = maple_devices[port][periph]; |
nkeynes@2 | 254 | if( dev == NULL ) /* already detached */ |
nkeynes@2 | 255 | return; |
nkeynes@2 | 256 | maple_devices[port][periph] = NULL; |
nkeynes@2 | 257 | if( dev->detach != NULL ) { |
nkeynes@2 | 258 | dev->detach(dev); |
nkeynes@2 | 259 | } |
nkeynes@2 | 260 | if( periph == 0 ) { |
nkeynes@2 | 261 | /* If we detach the main peripheral, we also have to detach all the |
nkeynes@2 | 262 | * subperipherals, or the system could get quite confused |
nkeynes@2 | 263 | */ |
nkeynes@2 | 264 | int i; |
nkeynes@2 | 265 | maple_periph_mask[port] = 0; |
nkeynes@2 | 266 | for( i=1; i<6; i++ ) { |
nkeynes@2 | 267 | maple_detach_device(port,i); |
nkeynes@2 | 268 | } |
nkeynes@2 | 269 | } else { |
nkeynes@2 | 270 | maple_periph_mask[port] &= (~(1<<(periph-1))); |
nkeynes@2 | 271 | } |
nkeynes@144 | 272 | |
nkeynes@2 | 273 | } |
nkeynes@144 | 274 | |
nkeynes@144 | 275 | void maple_detach_all() { |
nkeynes@144 | 276 | int i, j; |
nkeynes@144 | 277 | for( i=0; i<4; i++ ) { |
nkeynes@144 | 278 | for( j=0; j<6; j++ ) { |
nkeynes@144 | 279 | if( maple_devices[i][j] != NULL ) { |
nkeynes@144 | 280 | maple_device_t dev = maple_devices[i][j]; |
nkeynes@144 | 281 | if( dev->detach != NULL ) |
nkeynes@144 | 282 | dev->detach(dev); |
nkeynes@144 | 283 | if( dev->destroy != NULL ) |
nkeynes@144 | 284 | dev->destroy(dev); |
nkeynes@144 | 285 | } |
nkeynes@144 | 286 | } |
nkeynes@144 | 287 | maple_periph_mask[i] = 0; |
nkeynes@144 | 288 | } |
nkeynes@144 | 289 | } |
nkeynes@144 | 290 | |
nkeynes@144 | 291 | void maple_reattach_all() { |
nkeynes@144 | 292 | int i, j; |
nkeynes@144 | 293 | for( i=0; i<4; i++ ) { |
nkeynes@144 | 294 | for( j=0; j<6; j++ ) { |
nkeynes@144 | 295 | if( maple_devices[i][j] != NULL ) { |
nkeynes@144 | 296 | maple_device_t dev = maple_devices[i][j]; |
nkeynes@144 | 297 | if( dev->attach != NULL ) |
nkeynes@144 | 298 | dev->attach(dev); |
nkeynes@144 | 299 | } |
nkeynes@144 | 300 | } |
nkeynes@144 | 301 | } |
nkeynes@144 | 302 | } |
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