2 * $Id: maple.c,v 1.13 2007-11-06 12:23:25 nkeynes Exp $
4 * Implements the core Maple bus, including DMA transfers to and from the bus.
6 * Copyright (c) 2005 Nathan Keynes.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 #define MODULE maple_module
21 #include <glib/gstrfuncs.h>
27 void maple_init( void );
29 struct dreamcast_module maple_module = { "Maple", maple_init, NULL, NULL, NULL,
32 struct maple_device_class *maple_device_classes[] = { &controller_class, NULL };
34 void maple_init( void )
39 maple_device_t maple_new_device( const gchar *name )
41 maple_device_class_t clz = maple_get_device_class(name);
43 return clz->new_device();
48 maple_device_class_t maple_get_device_class( const gchar *name )
51 for( i=0; maple_device_classes[i] != NULL; i++ ) {
52 if( g_strcasecmp(maple_device_classes[i]->name, name ) == 0 )
53 return maple_device_classes[i];
58 const struct maple_device_class **maple_get_device_classes()
60 return (const struct maple_device_class **)maple_device_classes;
63 lxdream_config_entry_t maple_get_device_config( maple_device_t dev )
65 if( dev->get_config == NULL )
67 return dev->get_config(dev);
71 * Input data looks like this:
72 * 0: transfer control word
73 * 0: length of data in words (not including 3 word header)
74 * 1: low bit = lightgun mode
75 * 2: low 2 bits = port # (0..3)
76 * 3: 0x80 = last packet, 0x00 = normal packet
77 * 4: output buffer address
80 * 9: destination address
82 * 11: length of data in words (not including 3 word header)
83 * 12: command-specific data
87 * array is [port][subperipheral], so [0][0] is main peripheral on port A,
88 * [1][2] is the second subperipheral on port B and so on.
90 maple_device_t maple_devices[4][6];
91 int maple_periph_mask[4];
92 #define GETBYTE(n) ((uint32_t)(buf[n]))
93 #define GETWORD(n) (*((uint32_t *)(buf+(n))))
94 #define PUTBYTE(n,x) (buf[n] = (char)x)
95 #define PUTWORD(n,x) (*((uint32_t *)(return_buf+(n))) = (x))
97 maple_device_t maple_get_device( unsigned int port, unsigned int periph ) {
102 return maple_devices[port][periph];
105 void maple_handle_buffer( uint32_t address ) {
106 unsigned char *buf = (unsigned char *)mem_get_region(address);
108 ERROR( "Invalid or unmapped buffer passed to maple (0x%08X)", address );
110 unsigned int last = 0;
112 for( count=0; !last; count++ ) {
113 unsigned int port, length, mode, periph, periph_id, out_length;
114 unsigned int cmd, recv_addr, send_addr;
115 uint32_t return_addr;
116 unsigned char *return_buf;
118 last = GETBYTE(3) & 0x80; /* indicates last packet */
119 port = GETBYTE(2) & 0x03;
120 mode = GETBYTE(1) & 0x07;
121 length = GETBYTE(0) & 0xFF;
122 return_addr = GETWORD(4);
126 address +=4; /* skip? */
129 if( (return_addr & 0x1C000000) != 0x0C000000 ) {
130 ERROR( "Bad return address in maple packet: %08X", return_addr );
133 return_buf = mem_get_region(return_addr);
135 recv_addr = GETBYTE(9);
136 send_addr = GETBYTE(10);
138 if( GETBYTE(11) != length ||
139 send_addr >> 6 != port ||
140 recv_addr >> 6 != port ||
141 return_buf == NULL ) {
142 ERROR( "Received bad packet: %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X",
143 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7],
144 buf[8], buf[9], buf[10], buf[11] );
148 periph_id = recv_addr & 0x3F;
149 if( periph_id != 0x20 ) {
151 if( periph_id == (1<<i) ) {
156 if( periph == 0 ) { /* Bad setting */
161 maple_device_t dev = maple_devices[port][periph];
163 /* no device attached */
164 *((uint32_t *)return_buf) = -1;
166 int status, func, block;
170 status = MAPLE_RESP_INFO;
171 memcpy( return_buf+4, dev->ident, 112 );
174 case MAPLE_CMD_EXT_INFO:
175 status = MAPLE_RESP_EXT_INFO;
176 memcpy( return_buf+4, dev->ident, 192 );
179 case MAPLE_CMD_RESET:
180 if( dev->reset == NULL )
181 status = MAPLE_RESP_ACK;
182 else status = dev->reset(dev);
184 case MAPLE_CMD_SHUTDOWN:
185 if( dev->shutdown == NULL )
186 status = MAPLE_RESP_ACK;
187 else status = dev->shutdown(dev);
189 case MAPLE_CMD_GET_COND:
191 if( dev->get_condition == NULL )
192 status = MAPLE_ERR_CMD_UNKNOWN;
193 else status = dev->get_condition(dev, func,
198 status = MAPLE_RESP_DATA;
202 case MAPLE_CMD_SET_COND:
204 if( dev->set_condition == NULL )
205 status = MAPLE_ERR_CMD_UNKNOWN;
206 else status = dev->set_condition(dev, func,
210 status = MAPLE_RESP_ACK;
212 case MAPLE_CMD_READ_BLOCK:
215 if( dev->read_block == NULL )
216 status = MAPLE_ERR_CMD_UNKNOWN;
217 else status = dev->read_block(dev, func, block,
221 status = MAPLE_RESP_DATA;
226 case MAPLE_CMD_WRITE_BLOCK:
229 if( dev->write_block == NULL )
230 status = MAPLE_ERR_CMD_UNKNOWN;
232 status = dev->write_block(dev, func, block,
235 status = MAPLE_RESP_ACK;
239 status = MAPLE_ERR_CMD_UNKNOWN;
241 return_buf[0] = status;
242 return_buf[1] = send_addr;
243 return_buf[2] = recv_addr;
245 return_buf[2] |= maple_periph_mask[port];
246 return_buf[3] = out_length;
248 buf += 12 + (length<<2);
249 address += 12 + (length<<2);
251 asic_event( EVENT_MAPLE_DMA );
255 void maple_attach_device( maple_device_t dev, unsigned int port,
256 unsigned int periph ) {
258 assert( periph < 6 );
260 if( maple_devices[port][periph] != NULL ) {
261 /* Detach existing peripheral first */
262 maple_detach_device( port, periph );
265 maple_devices[port][periph] = dev;
267 maple_periph_mask[port] |= (1<<(periph-1));
268 else maple_periph_mask[port] |= 0x20;
269 if( dev->attach != NULL ) {
274 void maple_detach_device( unsigned int port, unsigned int periph ) {
276 assert( periph < 6 );
278 maple_device_t dev = maple_devices[port][periph];
279 if( dev == NULL ) /* already detached */
281 maple_devices[port][periph] = NULL;
282 if( dev->detach != NULL ) {
285 if( dev->destroy != NULL ) {
289 /* If we detach the main peripheral, we also have to detach all the
290 * subperipherals, or the system could get quite confused
293 maple_periph_mask[port] = 0;
294 for( i=1; i<6; i++ ) {
295 maple_detach_device(port,i);
298 maple_periph_mask[port] &= (~(1<<(periph-1)));
303 void maple_detach_all() {
305 for( i=0; i<4; i++ ) {
306 for( j=0; j<6; j++ ) {
307 if( maple_devices[i][j] != NULL ) {
308 maple_device_t dev = maple_devices[i][j];
309 if( dev->detach != NULL )
311 if( dev->destroy != NULL )
315 maple_periph_mask[i] = 0;
319 void maple_reattach_all() {
321 for( i=0; i<4; i++ ) {
322 for( j=0; j<6; j++ ) {
323 if( maple_devices[i][j] != NULL ) {
324 maple_device_t dev = maple_devices[i][j];
325 if( dev->attach != NULL )
.