filename | src/maple/maple.c |
changeset | 450:207461e79f21 |
prev | 447:3e095bfcb476 |
next | 480:d28c2992f5ee |
author | nkeynes |
date | Wed Oct 17 11:26:45 2007 +0000 (14 years ago) |
permissions | -rw-r--r-- |
last change | Split config management out to config.[ch] Manage config filename Check home dir + sysconfdir for conf file Initial work on a path settings dialog |
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nkeynes@31 | 1 | /** |
nkeynes@450 | 2 | * $Id: maple.c,v 1.11 2007-10-17 11:26:45 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@447 | 40 | maple_device_class_t clz = maple_get_device_class(name); |
nkeynes@447 | 41 | if( clz != NULL ) { |
nkeynes@447 | 42 | return clz->new_device(); |
nkeynes@447 | 43 | } |
nkeynes@447 | 44 | return NULL; |
nkeynes@447 | 45 | } |
nkeynes@447 | 46 | |
nkeynes@447 | 47 | const maple_device_class_t maple_get_device_class( const gchar *name ) |
nkeynes@447 | 48 | { |
nkeynes@144 | 49 | int i; |
nkeynes@144 | 50 | for( i=0; maple_device_classes[i] != NULL; i++ ) { |
nkeynes@144 | 51 | if( g_strcasecmp(maple_device_classes[i]->name, name ) == 0 ) |
nkeynes@447 | 52 | return maple_device_classes[i]; |
nkeynes@144 | 53 | } |
nkeynes@144 | 54 | return NULL; |
nkeynes@144 | 55 | } |
nkeynes@144 | 56 | |
nkeynes@447 | 57 | const struct maple_device_class **maple_get_device_classes() |
nkeynes@447 | 58 | { |
nkeynes@447 | 59 | return maple_device_classes; |
nkeynes@447 | 60 | } |
nkeynes@447 | 61 | |
nkeynes@450 | 62 | lxdream_config_entry_t maple_get_device_config( maple_device_t dev ) |
nkeynes@144 | 63 | { |
nkeynes@144 | 64 | if( dev->get_config == NULL ) |
nkeynes@144 | 65 | return NULL; |
nkeynes@144 | 66 | return dev->get_config(dev); |
nkeynes@144 | 67 | } |
nkeynes@144 | 68 | |
nkeynes@2 | 69 | /** |
nkeynes@2 | 70 | * Input data looks like this: |
nkeynes@2 | 71 | * 0: transfer control word |
nkeynes@2 | 72 | * 0: length of data in words (not including 3 word header) |
nkeynes@2 | 73 | * 1: low bit = lightgun mode |
nkeynes@2 | 74 | * 2: low 2 bits = port # (0..3) |
nkeynes@2 | 75 | * 3: 0x80 = last packet, 0x00 = normal packet |
nkeynes@2 | 76 | * 4: output buffer address |
nkeynes@2 | 77 | * 8: Command word |
nkeynes@2 | 78 | * 8: command code |
nkeynes@2 | 79 | * 9: destination address |
nkeynes@2 | 80 | * 10: source address |
nkeynes@2 | 81 | * 11: length of data in words (not including 3 word header) |
nkeynes@2 | 82 | * 12: command-specific data |
nkeynes@2 | 83 | */ |
nkeynes@2 | 84 | |
nkeynes@2 | 85 | /** |
nkeynes@2 | 86 | * array is [port][subperipheral], so [0][0] is main peripheral on port A, |
nkeynes@2 | 87 | * [1][2] is the second subperipheral on port B and so on. |
nkeynes@2 | 88 | */ |
nkeynes@2 | 89 | maple_device_t maple_devices[4][6]; |
nkeynes@2 | 90 | int maple_periph_mask[4]; |
nkeynes@2 | 91 | #define GETBYTE(n) ((uint32_t)(buf[n])) |
nkeynes@2 | 92 | #define GETWORD(n) (*((uint32_t *)(buf+(n)))) |
nkeynes@2 | 93 | #define PUTBYTE(n,x) (buf[n] = (char)x) |
nkeynes@2 | 94 | #define PUTWORD(n,x) (*((uint32_t *)(return_buf+(n))) = (x)) |
nkeynes@2 | 95 | |
nkeynes@144 | 96 | maple_device_t maple_get_device( unsigned int port, unsigned int periph ) { |
nkeynes@144 | 97 | if( port >= 4 ) |
nkeynes@144 | 98 | return NULL; |
nkeynes@144 | 99 | if( periph >= 6 ) |
nkeynes@144 | 100 | return NULL; |
nkeynes@144 | 101 | return maple_devices[port][periph]; |
nkeynes@144 | 102 | } |
nkeynes@144 | 103 | |
nkeynes@1 | 104 | void maple_handle_buffer( uint32_t address ) { |
nkeynes@2 | 105 | unsigned char *buf = (unsigned char *)mem_get_region(address); |
nkeynes@1 | 106 | if( buf == NULL ) { |
nkeynes@1 | 107 | ERROR( "Invalid or unmapped buffer passed to maple (0x%08X)", address ); |
nkeynes@1 | 108 | } else { |
nkeynes@2 | 109 | unsigned int last = 0; |
nkeynes@2 | 110 | int i = 0, count; |
nkeynes@2 | 111 | for( count=0; !last; count++ ) { |
nkeynes@2 | 112 | unsigned int port, length, gun, periph, periph_id, out_length; |
nkeynes@2 | 113 | unsigned int cmd, recv_addr, send_addr; |
nkeynes@2 | 114 | uint32_t return_addr; |
nkeynes@2 | 115 | unsigned char *return_buf; |
nkeynes@1 | 116 | |
nkeynes@2 | 117 | last = GETBYTE(3) & 0x80; /* indicates last packet */ |
nkeynes@2 | 118 | port = GETBYTE(2) & 0x03; |
nkeynes@2 | 119 | gun = GETBYTE(1) & 0x01; |
nkeynes@2 | 120 | length = GETBYTE(0) & 0xFF; |
nkeynes@2 | 121 | return_addr = GETWORD(4); |
nkeynes@447 | 122 | |
nkeynes@447 | 123 | if( (return_addr & 0x1C000000) != 0x0C000000 ) { |
nkeynes@447 | 124 | ERROR( "Bad return address in maple packet: %08X", return_addr ); |
nkeynes@447 | 125 | break; |
nkeynes@2 | 126 | } |
nkeynes@2 | 127 | return_buf = mem_get_region(return_addr); |
nkeynes@2 | 128 | cmd = GETBYTE(8); |
nkeynes@2 | 129 | recv_addr = GETBYTE(9); |
nkeynes@2 | 130 | send_addr = GETBYTE(10); |
nkeynes@2 | 131 | /* Sanity checks */ |
nkeynes@2 | 132 | if( GETBYTE(11) != length || |
nkeynes@447 | 133 | send_addr >> 6 != port || |
nkeynes@2 | 134 | recv_addr >> 6 != port || |
nkeynes@2 | 135 | return_buf == NULL ) { |
nkeynes@447 | 136 | ERROR( "Received bad packet: %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X", |
nkeynes@447 | 137 | buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7], |
nkeynes@447 | 138 | buf[8], buf[9], buf[10], buf[11] ); |
nkeynes@447 | 139 | break; |
nkeynes@2 | 140 | } |
nkeynes@2 | 141 | periph = 0; |
nkeynes@2 | 142 | periph_id = recv_addr & 0x3F; |
nkeynes@2 | 143 | if( periph_id != 0x20 ) { |
nkeynes@2 | 144 | for( i=0;i<5;i++ ) { |
nkeynes@2 | 145 | if( periph_id == (1<<i) ) { |
nkeynes@2 | 146 | periph = i+1; |
nkeynes@2 | 147 | break; |
nkeynes@2 | 148 | } |
nkeynes@2 | 149 | } |
nkeynes@2 | 150 | if( periph == 0 ) { /* Bad setting */ |
nkeynes@2 | 151 | /* ERROR */ |
nkeynes@2 | 152 | } |
nkeynes@2 | 153 | } |
nkeynes@2 | 154 | |
nkeynes@2 | 155 | maple_device_t dev = maple_devices[port][periph]; |
nkeynes@2 | 156 | if( dev == NULL ) { |
nkeynes@2 | 157 | /* no device attached */ |
nkeynes@2 | 158 | *((uint32_t *)return_buf) = -1; |
nkeynes@2 | 159 | } else { |
nkeynes@2 | 160 | int status, func, block; |
nkeynes@2 | 161 | out_length = 0; |
nkeynes@2 | 162 | switch( cmd ) { |
nkeynes@2 | 163 | case MAPLE_CMD_INFO: |
nkeynes@2 | 164 | status = MAPLE_RESP_INFO; |
nkeynes@2 | 165 | memcpy( return_buf+4, dev->ident, 112 ); |
nkeynes@2 | 166 | out_length = 0x1C; |
nkeynes@2 | 167 | break; |
nkeynes@2 | 168 | case MAPLE_CMD_EXT_INFO: |
nkeynes@2 | 169 | status = MAPLE_RESP_EXT_INFO; |
nkeynes@2 | 170 | memcpy( return_buf+4, dev->ident, 192 ); |
nkeynes@2 | 171 | out_length = 0x30; |
nkeynes@2 | 172 | break; |
nkeynes@2 | 173 | case MAPLE_CMD_RESET: |
nkeynes@2 | 174 | if( dev->reset == NULL ) |
nkeynes@2 | 175 | status = MAPLE_RESP_ACK; |
nkeynes@2 | 176 | else status = dev->reset(dev); |
nkeynes@2 | 177 | break; |
nkeynes@2 | 178 | case MAPLE_CMD_SHUTDOWN: |
nkeynes@2 | 179 | if( dev->shutdown == NULL ) |
nkeynes@2 | 180 | status = MAPLE_RESP_ACK; |
nkeynes@2 | 181 | else status = dev->shutdown(dev); |
nkeynes@2 | 182 | break; |
nkeynes@2 | 183 | case MAPLE_CMD_GET_COND: |
nkeynes@2 | 184 | func = GETWORD(12); |
nkeynes@2 | 185 | if( dev->get_condition == NULL ) |
nkeynes@2 | 186 | status = MAPLE_ERR_CMD_UNKNOWN; |
nkeynes@2 | 187 | else status = dev->get_condition(dev, func, |
nkeynes@2 | 188 | return_buf+8, |
nkeynes@2 | 189 | &out_length ); |
nkeynes@121 | 190 | out_length++; |
nkeynes@2 | 191 | if( status == 0 ) { |
nkeynes@2 | 192 | status = MAPLE_RESP_DATA; |
nkeynes@2 | 193 | PUTWORD(4,func); |
nkeynes@2 | 194 | } |
nkeynes@2 | 195 | break; |
nkeynes@2 | 196 | case MAPLE_CMD_SET_COND: |
nkeynes@2 | 197 | func = GETWORD(12); |
nkeynes@2 | 198 | if( dev->set_condition == NULL ) |
nkeynes@2 | 199 | status = MAPLE_ERR_CMD_UNKNOWN; |
nkeynes@2 | 200 | else status = dev->set_condition(dev, func, |
nkeynes@2 | 201 | buf+16, |
nkeynes@2 | 202 | length); |
nkeynes@2 | 203 | if( status == 0 ) |
nkeynes@2 | 204 | status = MAPLE_RESP_ACK; |
nkeynes@2 | 205 | break; |
nkeynes@2 | 206 | case MAPLE_CMD_READ_BLOCK: |
nkeynes@2 | 207 | func = GETWORD(12); |
nkeynes@2 | 208 | block = GETWORD(16); |
nkeynes@2 | 209 | if( dev->read_block == NULL ) |
nkeynes@2 | 210 | status = MAPLE_ERR_CMD_UNKNOWN; |
nkeynes@2 | 211 | else status = dev->read_block(dev, func, block, |
nkeynes@2 | 212 | return_buf+12, |
nkeynes@2 | 213 | &out_length ); |
nkeynes@2 | 214 | if( status == 0 ) { |
nkeynes@2 | 215 | status = MAPLE_RESP_DATA; |
nkeynes@2 | 216 | PUTWORD(4,func); |
nkeynes@2 | 217 | PUTWORD(8,block); |
nkeynes@2 | 218 | } |
nkeynes@2 | 219 | break; |
nkeynes@2 | 220 | case MAPLE_CMD_WRITE_BLOCK: |
nkeynes@2 | 221 | func = GETWORD(12); |
nkeynes@2 | 222 | block = GETWORD(16); |
nkeynes@2 | 223 | if( dev->write_block == NULL ) |
nkeynes@2 | 224 | status = MAPLE_ERR_CMD_UNKNOWN; |
nkeynes@2 | 225 | else { |
nkeynes@2 | 226 | status = dev->write_block(dev, func, block, |
nkeynes@2 | 227 | buf+20, length); |
nkeynes@2 | 228 | if( status == 0 ) |
nkeynes@2 | 229 | status = MAPLE_RESP_ACK; |
nkeynes@2 | 230 | } |
nkeynes@2 | 231 | break; |
nkeynes@2 | 232 | default: |
nkeynes@2 | 233 | status = MAPLE_ERR_CMD_UNKNOWN; |
nkeynes@2 | 234 | } |
nkeynes@2 | 235 | return_buf[0] = status; |
nkeynes@2 | 236 | return_buf[1] = send_addr; |
nkeynes@2 | 237 | return_buf[2] = recv_addr; |
nkeynes@2 | 238 | if( periph == 0 ) |
nkeynes@2 | 239 | return_buf[2] |= maple_periph_mask[port]; |
nkeynes@2 | 240 | return_buf[3] = out_length; |
nkeynes@2 | 241 | } |
nkeynes@2 | 242 | buf += 12 + (length<<2); |
nkeynes@447 | 243 | address += 12 + (length<<2); |
nkeynes@2 | 244 | } |
nkeynes@2 | 245 | asic_event( EVENT_MAPLE_DMA ); |
nkeynes@1 | 246 | } |
nkeynes@1 | 247 | } |
nkeynes@2 | 248 | |
nkeynes@2 | 249 | void maple_attach_device( maple_device_t dev, unsigned int port, |
nkeynes@2 | 250 | unsigned int periph ) { |
nkeynes@2 | 251 | assert( port < 4 ); |
nkeynes@2 | 252 | assert( periph < 6 ); |
nkeynes@2 | 253 | |
nkeynes@2 | 254 | if( maple_devices[port][periph] != NULL ) { |
nkeynes@2 | 255 | /* Detach existing peripheral first */ |
nkeynes@2 | 256 | maple_detach_device( port, periph ); |
nkeynes@2 | 257 | } |
nkeynes@2 | 258 | |
nkeynes@2 | 259 | maple_devices[port][periph] = dev; |
nkeynes@2 | 260 | if( periph != 0 ) |
nkeynes@2 | 261 | maple_periph_mask[port] |= (1<<(periph-1)); |
nkeynes@2 | 262 | else maple_periph_mask[port] |= 0x20; |
nkeynes@2 | 263 | if( dev->attach != NULL ) { |
nkeynes@2 | 264 | dev->attach( dev ); |
nkeynes@2 | 265 | } |
nkeynes@2 | 266 | } |
nkeynes@2 | 267 | |
nkeynes@2 | 268 | void maple_detach_device( unsigned int port, unsigned int periph ) { |
nkeynes@2 | 269 | assert( port < 4 ); |
nkeynes@2 | 270 | assert( periph < 6 ); |
nkeynes@2 | 271 | |
nkeynes@2 | 272 | maple_device_t dev = maple_devices[port][periph]; |
nkeynes@2 | 273 | if( dev == NULL ) /* already detached */ |
nkeynes@2 | 274 | return; |
nkeynes@2 | 275 | maple_devices[port][periph] = NULL; |
nkeynes@2 | 276 | if( dev->detach != NULL ) { |
nkeynes@2 | 277 | dev->detach(dev); |
nkeynes@2 | 278 | } |
nkeynes@447 | 279 | if( dev->destroy != NULL ) { |
nkeynes@447 | 280 | dev->destroy(dev); |
nkeynes@447 | 281 | } |
nkeynes@2 | 282 | if( periph == 0 ) { |
nkeynes@2 | 283 | /* If we detach the main peripheral, we also have to detach all the |
nkeynes@2 | 284 | * subperipherals, or the system could get quite confused |
nkeynes@2 | 285 | */ |
nkeynes@2 | 286 | int i; |
nkeynes@2 | 287 | maple_periph_mask[port] = 0; |
nkeynes@2 | 288 | for( i=1; i<6; i++ ) { |
nkeynes@2 | 289 | maple_detach_device(port,i); |
nkeynes@2 | 290 | } |
nkeynes@2 | 291 | } else { |
nkeynes@2 | 292 | maple_periph_mask[port] &= (~(1<<(periph-1))); |
nkeynes@2 | 293 | } |
nkeynes@144 | 294 | |
nkeynes@2 | 295 | } |
nkeynes@144 | 296 | |
nkeynes@144 | 297 | void maple_detach_all() { |
nkeynes@144 | 298 | int i, j; |
nkeynes@144 | 299 | for( i=0; i<4; i++ ) { |
nkeynes@144 | 300 | for( j=0; j<6; j++ ) { |
nkeynes@144 | 301 | if( maple_devices[i][j] != NULL ) { |
nkeynes@144 | 302 | maple_device_t dev = maple_devices[i][j]; |
nkeynes@144 | 303 | if( dev->detach != NULL ) |
nkeynes@144 | 304 | dev->detach(dev); |
nkeynes@144 | 305 | if( dev->destroy != NULL ) |
nkeynes@144 | 306 | dev->destroy(dev); |
nkeynes@144 | 307 | } |
nkeynes@144 | 308 | } |
nkeynes@144 | 309 | maple_periph_mask[i] = 0; |
nkeynes@144 | 310 | } |
nkeynes@144 | 311 | } |
nkeynes@144 | 312 | |
nkeynes@144 | 313 | void maple_reattach_all() { |
nkeynes@144 | 314 | int i, j; |
nkeynes@144 | 315 | for( i=0; i<4; i++ ) { |
nkeynes@144 | 316 | for( j=0; j<6; j++ ) { |
nkeynes@144 | 317 | if( maple_devices[i][j] != NULL ) { |
nkeynes@144 | 318 | maple_device_t dev = maple_devices[i][j]; |
nkeynes@144 | 319 | if( dev->attach != NULL ) |
nkeynes@144 | 320 | dev->attach(dev); |
nkeynes@144 | 321 | } |
nkeynes@144 | 322 | } |
nkeynes@144 | 323 | } |
nkeynes@144 | 324 | } |
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