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[] = {
33 &controller_class, &keyboard_class, &mouse_class, NULL };
35 void maple_init( void )
40 maple_device_t maple_new_device( const gchar *name )
42 maple_device_class_t clz = maple_get_device_class(name);
44 return clz->new_device();
49 maple_device_class_t maple_get_device_class( const gchar *name )
52 for( i=0; maple_device_classes[i] != NULL; i++ ) {
53 if( g_strcasecmp(maple_device_classes[i]->name, name ) == 0 )
54 return maple_device_classes[i];
59 const struct maple_device_class **maple_get_device_classes()
61 return (const struct maple_device_class **)maple_device_classes;
64 lxdream_config_entry_t maple_get_device_config( maple_device_t dev )
66 if( dev->get_config == NULL )
68 return dev->get_config(dev);
72 * Input data looks like this:
73 * 0: transfer control word
74 * 0: length of data in words (not including 3 word header)
75 * 1: low bit = lightgun mode
76 * 2: low 2 bits = port # (0..3)
77 * 3: 0x80 = last packet, 0x00 = normal packet
78 * 4: output buffer address
81 * 9: destination address
83 * 11: length of data in words (not including 3 word header)
84 * 12: command-specific data
88 * array is [port][subperipheral], so [0][0] is main peripheral on port A,
89 * [1][2] is the second subperipheral on port B and so on.
91 maple_device_t maple_devices[4][6];
92 int maple_periph_mask[4];
93 #define GETBYTE(n) ((uint32_t)(buf[n]))
94 #define GETWORD(n) (*((uint32_t *)(buf+(n))))
95 #define PUTBYTE(n,x) (buf[n] = (char)x)
96 #define PUTWORD(n,x) (*((uint32_t *)(return_buf+(n))) = (x))
98 maple_device_t maple_get_device( unsigned int port, unsigned int periph ) {
103 return maple_devices[port][periph];
106 void maple_handle_buffer( uint32_t address ) {
107 unsigned char *buf = (unsigned char *)mem_get_region(address);
109 ERROR( "Invalid or unmapped buffer passed to maple (0x%08X)", address );
111 unsigned int last = 0;
113 for( count=0; !last; count++ ) {
114 unsigned int port, length, mode, periph, periph_id, out_length;
115 unsigned int cmd, recv_addr, send_addr;
116 uint32_t return_addr;
117 unsigned char *return_buf;
119 last = GETBYTE(3) & 0x80; /* indicates last packet */
120 port = GETBYTE(2) & 0x03;
121 mode = GETBYTE(1) & 0x07;
122 length = GETBYTE(0) & 0xFF;
123 return_addr = GETWORD(4);
127 address +=4; /* skip? */
130 if( (return_addr & 0x1C000000) != 0x0C000000 ) {
131 ERROR( "Bad return address in maple packet: %08X", return_addr );
134 return_buf = mem_get_region(return_addr);
136 recv_addr = GETBYTE(9);
137 send_addr = GETBYTE(10);
139 if( GETBYTE(11) != length ||
140 send_addr >> 6 != port ||
141 recv_addr >> 6 != port ||
142 return_buf == NULL ) {
143 ERROR( "Received bad packet: %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X",
144 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7],
145 buf[8], buf[9], buf[10], buf[11] );
149 periph_id = recv_addr & 0x3F;
150 if( periph_id != 0x20 ) {
152 if( periph_id == (1<<i) ) {
157 if( periph == 0 ) { /* Bad setting */
162 maple_device_t dev = maple_devices[port][periph];
164 /* no device attached */
165 *((uint32_t *)return_buf) = -1;
167 int status, func, block;
171 status = MAPLE_RESP_INFO;
172 memcpy( return_buf+4, dev->ident, 112 );
175 case MAPLE_CMD_EXT_INFO:
176 status = MAPLE_RESP_EXT_INFO;
177 memcpy( return_buf+4, dev->ident, 192 );
180 case MAPLE_CMD_RESET:
181 if( dev->reset == NULL )
182 status = MAPLE_RESP_ACK;
183 else status = dev->reset(dev);
185 case MAPLE_CMD_SHUTDOWN:
186 if( dev->shutdown == NULL )
187 status = MAPLE_RESP_ACK;
188 else status = dev->shutdown(dev);
190 case MAPLE_CMD_GET_COND:
192 if( dev->get_condition == NULL )
193 status = MAPLE_ERR_CMD_UNKNOWN;
194 else status = dev->get_condition(dev, func,
199 status = MAPLE_RESP_DATA;
203 case MAPLE_CMD_SET_COND:
205 if( dev->set_condition == NULL )
206 status = MAPLE_ERR_CMD_UNKNOWN;
207 else status = dev->set_condition(dev, func,
211 status = MAPLE_RESP_ACK;
213 case MAPLE_CMD_READ_BLOCK:
216 if( dev->read_block == NULL )
217 status = MAPLE_ERR_CMD_UNKNOWN;
218 else status = dev->read_block(dev, func, block,
222 status = MAPLE_RESP_DATA;
227 case MAPLE_CMD_WRITE_BLOCK:
230 if( dev->write_block == NULL )
231 status = MAPLE_ERR_CMD_UNKNOWN;
233 status = dev->write_block(dev, func, block,
236 status = MAPLE_RESP_ACK;
240 status = MAPLE_ERR_CMD_UNKNOWN;
242 return_buf[0] = status;
243 return_buf[1] = send_addr;
244 return_buf[2] = recv_addr;
246 return_buf[2] |= maple_periph_mask[port];
247 return_buf[3] = out_length;
249 buf += 12 + (length<<2);
250 address += 12 + (length<<2);
252 asic_event( EVENT_MAPLE_DMA );
256 void maple_attach_device( maple_device_t dev, unsigned int port,
257 unsigned int periph ) {
259 assert( periph < 6 );
261 if( maple_devices[port][periph] != NULL ) {
262 /* Detach existing peripheral first */
263 maple_detach_device( port, periph );
266 maple_devices[port][periph] = dev;
268 maple_periph_mask[port] |= (1<<(periph-1));
269 else maple_periph_mask[port] |= 0x20;
270 if( dev->attach != NULL ) {
275 void maple_detach_device( unsigned int port, unsigned int periph ) {
277 assert( periph < 6 );
279 maple_device_t dev = maple_devices[port][periph];
280 if( dev == NULL ) /* already detached */
282 maple_devices[port][periph] = NULL;
283 if( dev->detach != NULL ) {
286 if( dev->destroy != NULL ) {
290 /* If we detach the main peripheral, we also have to detach all the
291 * subperipherals, or the system could get quite confused
294 maple_periph_mask[port] = 0;
295 for( i=1; i<6; i++ ) {
296 maple_detach_device(port,i);
299 maple_periph_mask[port] &= (~(1<<(periph-1)));
304 void maple_detach_all() {
306 for( i=0; i<4; i++ ) {
307 for( j=0; j<6; j++ ) {
308 if( maple_devices[i][j] != NULL ) {
309 maple_device_t dev = maple_devices[i][j];
310 if( dev->detach != NULL )
312 if( dev->destroy != NULL )
316 maple_periph_mask[i] = 0;
320 void maple_reattach_all() {
322 for( i=0; i<4; i++ ) {
323 for( j=0; j<6; j++ ) {
324 if( maple_devices[i][j] != NULL ) {
325 maple_device_t dev = maple_devices[i][j];
326 if( dev->detach != NULL )
328 if( dev->attach != NULL )
335 void maple_default_destroy( maple_device_t mdev )
.