SheepShaver/src/serial.cpp

/*
 *  serial.cpp - Serial device driver
 *
 *  SheepShaver (C) 1997-2008 Marc Hellwig and Christian Bauer
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "sysdeps.h"
#include "main.h"
#include "macos_util.h"
#include "serial.h"
#include "serial_defs.h"

#define DEBUG 0
#include "debug.h"


// Global variables
SERDPort *the_serd_port[2];

// Function pointers from imported functions
typedef int16 (*iocic_ptr)(uint32, int16);
static uint32 iocic_tvect = 0;
static inline int16 IOCommandIsComplete(uint32 arg1, int16 arg2)
{
        return (int16)CallMacOS2(iocic_ptr, iocic_tvect, arg1, arg2);
}


/*
 *  Empty function (AIn/BIn Open/Close)
 */

int16 SerialNothing(uint32 pb, uint32 dce)
{
        return noErr;
}


/*
 *  Driver Open() routine (output side only)
 */

int16 SerialOpen(uint32 pb, uint32 dce)
{
        D(bug("SerialOpen pb %08lx, dce %08lx\n", pb, dce));

        // Get IOCommandIsComplete function
        iocic_tvect = FindLibSymbol("\021DriverServicesLib", "\023IOCommandIsComplete");
        D(bug("IOCommandIsComplete TVECT at %08lx\n", iocic_tvect));
        if (iocic_tvect == 0) {
                printf("FATAL: SerialOpen(): Can't find IOCommandIsComplete()\n");
                return openErr;
        }

        // Do nothing if port is already open
        SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
        if (the_port->is_open)
                return noErr;

        // Init variables
        the_port->read_pending = the_port->write_pending = false;
        the_port->read_done = the_port->write_done = false;
        the_port->cum_errors = 0;

        // Open port
        int16 res = the_port->open(ReadMacInt16(0x1fc + ((-(int16)ReadMacInt16(dce + dCtlRefNum)-6) & 2)));
        if (res)
                return res;

        // Allocate Deferred Task structures
        if ((the_port->dt_store = Mac_sysalloc(SIZEOF_serdt * 2)) == 0)
                return openErr;
        uint32 input_dt = the_port->input_dt = the_port->dt_store;
        uint32 output_dt = the_port->output_dt = the_port->dt_store + SIZEOF_serdt;
        D(bug(" input_dt %08lx, output_dt %08lx\n", input_dt, output_dt));

        WriteMacInt16(input_dt + qType, dtQType);
        WriteMacInt32(input_dt + dtAddr, input_dt + serdtCode);
        WriteMacInt32(input_dt + dtParam, input_dt + serdtResult);
                                                                                                                        // Deferred function for signalling that Prime is complete (pointer to mydtResult in a1)
        WriteMacInt16(input_dt + serdtCode, 0x2019);                    // move.l       (a1)+,d0        (result)
        WriteMacInt16(input_dt + serdtCode + 2, 0x2251);                // move.l       (a1),a1         (dce)
        WriteMacInt32(input_dt + serdtCode + 4, 0x207808fc);    // move.l       JIODone,a0
        WriteMacInt16(input_dt + serdtCode + 8, 0x4ed0);                // jmp          (a0)

        WriteMacInt16(output_dt + qType, dtQType);
        WriteMacInt32(output_dt + dtAddr, output_dt + serdtCode);
        WriteMacInt32(output_dt + dtParam, output_dt + serdtResult);
                                                                                                                        // Deferred function for signalling that Prime is complete (pointer to mydtResult in a1)
        WriteMacInt16(output_dt + serdtCode, 0x2019);                   // move.l       (a1)+,d0        (result)
        WriteMacInt16(output_dt + serdtCode + 2, 0x2251);               // move.l       (a1),a1         (dce)
        WriteMacInt32(output_dt + serdtCode + 4, 0x207808fc);   // move.l       JIODone,a0
        WriteMacInt16(output_dt + serdtCode + 8, 0x4ed0);               // jmp          (a0)

        the_port->is_open = true;
        return noErr;
}


/*
 *  Driver Prime() routines
 */

int16 SerialPrimeIn(uint32 pb, uint32 dce)
{
        D(bug("SerialPrimeIn pb %08lx, dce %08lx\n", pb, dce));
        int16 res;

        SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
        if (!the_port->is_open)
                res = notOpenErr;
        else {
                if (the_port->read_pending) {
                        printf("FATAL: SerialPrimeIn() called while request is pending\n");
                        res = readErr;
                } else
                        res = the_port->prime_in(pb, dce);
        }

        if (ReadMacInt16(pb + ioTrap) & 0x0200)
                if (res > 0) {
                        WriteMacInt16(pb + ioResult, 0);
                        return 0;       // Command in progress
                } else {
                        WriteMacInt16(pb + ioResult, res);
                        return res;
                }
        else
                if (res > 0)
                        return 0;                                       // Command in progress
                else {
                        IOCommandIsComplete(pb, res);
                        return res;
                }
}

int16 SerialPrimeOut(uint32 pb, uint32 dce)
{
        D(bug("SerialPrimeOut pb %08lx, dce %08lx\n", pb, dce));
        int16 res;

        SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
        if (!the_port->is_open)
                res = notOpenErr;
        else {
                if (the_port->write_pending) {
                        printf("FATAL: SerialPrimeOut() called while request is pending\n");
                        res = writErr;
                } else
                        res = the_port->prime_out(pb, dce);
        }

        if (ReadMacInt16(pb + ioTrap) & 0x0200)
                if (res > 0) {
                        WriteMacInt16(pb + ioResult, 0);
                        return 0;       // Command in progress
                } else {
                        WriteMacInt16(pb + ioResult, res);
                        return res;
                }
        else
                if (res > 0)
                        return 0;                                       // Command in progress
                else {
                        IOCommandIsComplete(pb, res);
                        return res;
                }
}


/*
 *  Driver Control() routine
 */

int16 SerialControl(uint32 pb, uint32 dce)
{
        uint16 code = ReadMacInt16(pb + csCode);
        D(bug("SerialControl %d, pb %08lx, dce %08lx\n", code, pb, dce));
        int16 res;

        SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
        if (!the_port->is_open)
                res = notOpenErr;
        else {
                switch (code) {
                        case kSERDSetPollWrite:
                                res = noErr;
                                break;
                        default:
                                res = the_port->control(pb, dce, code);
                                break;
                }
        }

        if (code == 1)
                return res;
        else if (ReadMacInt16(pb + ioTrap) & 0x0200) {
                WriteMacInt16(pb + ioResult, res);
                return res;
        } else {
                IOCommandIsComplete(pb, res);
                return res;
        }
}


/*
 *  Driver Status() routine
 */

int16 SerialStatus(uint32 pb, uint32 dce)
{
        uint16 code = ReadMacInt16(pb + csCode);
        D(bug("SerialStatus %d, pb %08lx, dce %08lx\n", code, pb, dce));
        int16 res;

        SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
        if (!the_port->is_open)
                res = notOpenErr;
        else {
                switch (code) {
                        case kSERDVersion:
                                WriteMacInt8(pb + csParam, 9);          // Second-generation SerialDMA driver
                                res = noErr;
                                break;

                        case 0x8000:
                                WriteMacInt8(pb + csParam, 9);          // Second-generation SerialDMA driver
                                WriteMacInt16(pb + csParam + 4, 0x1997);        // Date of serial driver
                                WriteMacInt16(pb + csParam + 6, 0x0616);
                                res = noErr;
                                break;
        
                        default:
                                res = the_port->status(pb, dce, code);
                                break;
                }
        }

        if (ReadMacInt16(pb + ioTrap) & 0x0200) {
                WriteMacInt16(pb + ioResult, res);
                return res;
        } else {
                IOCommandIsComplete(pb, res);
                return res;
        }
}


/*
 *  Driver Close() routine
 */

int16 SerialClose(uint32 pb, uint32 dce)
{
        D(bug("SerialClose pb %08lx, dce %08lx\n", pb, dce));

        // Close port if open
        SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
        if (the_port->is_open) {
                Mac_sysfree(the_port->dt_store);
                int16 res = the_port->close();
                the_port->is_open = false;
                return res;
        } else
                return noErr;
}


/*
 *  Serial interrupt - Prime command completed, activate deferred tasks to call IODone
 */

void SerialInterrupt(void)
{
        D(bug("SerialIRQ\n"));

        // Port 0
        if (the_serd_port[0]->is_open) {
                if (the_serd_port[0]->read_pending && the_serd_port[0]->read_done) {
                        Enqueue(the_serd_port[0]->input_dt, 0xd92);
                        the_serd_port[0]->read_pending = the_serd_port[0]->read_done = false;
                }
                if (the_serd_port[0]->write_pending && the_serd_port[0]->write_done) {
                        Enqueue(the_serd_port[0]->output_dt, 0xd92);
                        the_serd_port[0]->write_pending = the_serd_port[0]->write_done = false;
                }
        }

        // Port 1
        if (the_serd_port[1]->is_open) {
                if (the_serd_port[1]->read_pending && the_serd_port[1]->read_done) {
                        Enqueue(the_serd_port[1]->input_dt, 0xd92);
                        the_serd_port[1]->read_pending = the_serd_port[1]->read_done = false;
                }
                if (the_serd_port[1]->write_pending && the_serd_port[1]->write_done) {
                        Enqueue(the_serd_port[1]->output_dt, 0xd92);
                        the_serd_port[1]->write_pending = the_serd_port[1]->write_done = false;
                }
        }
}
1	/*
2	* serial.cpp - Serial device driver
3	*
4	* SheepShaver (C) 1997-2008 Marc Hellwig and Christian Bauer
5	*
6	* This program is free software; you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19	*/
20
21	#include "sysdeps.h"
22	#include "main.h"
23	#include "macos_util.h"
24	#include "serial.h"
25	#include "serial_defs.h"
26
27	#define DEBUG 0
28	#include "debug.h"
29
30
31	// Global variables
32	SERDPort *the_serd_port[2];
33
34	// Function pointers from imported functions
35	typedef int16 (*iocic_ptr)(uint32, int16);
36	static uint32 iocic_tvect = 0;
37	static inline int16 IOCommandIsComplete(uint32 arg1, int16 arg2)
38	{
39	return (int16)CallMacOS2(iocic_ptr, iocic_tvect, arg1, arg2);
40	}
41
42
43	/*
44	* Empty function (AIn/BIn Open/Close)
45	*/
46
47	int16 SerialNothing(uint32 pb, uint32 dce)
48	{
49	return noErr;
50	}
51
52
53	/*
54	* Driver Open() routine (output side only)
55	*/
56
57	int16 SerialOpen(uint32 pb, uint32 dce)
58	{
59	D(bug("SerialOpen pb %08lx, dce %08lx\n", pb, dce));
60
61	// Get IOCommandIsComplete function
62	iocic_tvect = FindLibSymbol("\021DriverServicesLib", "\023IOCommandIsComplete");
63	D(bug("IOCommandIsComplete TVECT at %08lx\n", iocic_tvect));
64	if (iocic_tvect == 0) {
65	printf("FATAL: SerialOpen(): Can't find IOCommandIsComplete()\n");
66	return openErr;
67	}
68
69	// Do nothing if port is already open
70	SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
71	if (the_port->is_open)
72	return noErr;
73
74	// Init variables
75	the_port->read_pending = the_port->write_pending = false;
76	the_port->read_done = the_port->write_done = false;
77	the_port->cum_errors = 0;
78
79	// Open port
80	int16 res = the_port->open(ReadMacInt16(0x1fc + ((-(int16)ReadMacInt16(dce + dCtlRefNum)-6) & 2)));
81	if (res)
82	return res;
83
84	// Allocate Deferred Task structures
85	if ((the_port->dt_store = Mac_sysalloc(SIZEOF_serdt * 2)) == 0)
86	return openErr;
87	uint32 input_dt = the_port->input_dt = the_port->dt_store;
88	uint32 output_dt = the_port->output_dt = the_port->dt_store + SIZEOF_serdt;
89	D(bug(" input_dt %08lx, output_dt %08lx\n", input_dt, output_dt));
90
91	WriteMacInt16(input_dt + qType, dtQType);
92	WriteMacInt32(input_dt + dtAddr, input_dt + serdtCode);
93	WriteMacInt32(input_dt + dtParam, input_dt + serdtResult);
94	// Deferred function for signalling that Prime is complete (pointer to mydtResult in a1)
95	WriteMacInt16(input_dt + serdtCode, 0x2019); // move.l (a1)+,d0 (result)
96	WriteMacInt16(input_dt + serdtCode + 2, 0x2251); // move.l (a1),a1 (dce)
97	WriteMacInt32(input_dt + serdtCode + 4, 0x207808fc); // move.l JIODone,a0
98	WriteMacInt16(input_dt + serdtCode + 8, 0x4ed0); // jmp (a0)
99
100	WriteMacInt16(output_dt + qType, dtQType);
101	WriteMacInt32(output_dt + dtAddr, output_dt + serdtCode);
102	WriteMacInt32(output_dt + dtParam, output_dt + serdtResult);
103	// Deferred function for signalling that Prime is complete (pointer to mydtResult in a1)
104	WriteMacInt16(output_dt + serdtCode, 0x2019); // move.l (a1)+,d0 (result)
105	WriteMacInt16(output_dt + serdtCode + 2, 0x2251); // move.l (a1),a1 (dce)
106	WriteMacInt32(output_dt + serdtCode + 4, 0x207808fc); // move.l JIODone,a0
107	WriteMacInt16(output_dt + serdtCode + 8, 0x4ed0); // jmp (a0)
108
109	the_port->is_open = true;
110	return noErr;
111	}
112
113
114	/*
115	* Driver Prime() routines
116	*/
117
118	int16 SerialPrimeIn(uint32 pb, uint32 dce)
119	{
120	D(bug("SerialPrimeIn pb %08lx, dce %08lx\n", pb, dce));
121	int16 res;
122
123	SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
124	if (!the_port->is_open)
125	res = notOpenErr;
126	else {
127	if (the_port->read_pending) {
128	printf("FATAL: SerialPrimeIn() called while request is pending\n");
129	res = readErr;
130	} else
131	res = the_port->prime_in(pb, dce);
132	}
133
134	if (ReadMacInt16(pb + ioTrap) & 0x0200)
135	if (res > 0) {
136	WriteMacInt16(pb + ioResult, 0);
137	return 0; // Command in progress
138	} else {
139	WriteMacInt16(pb + ioResult, res);
140	return res;
141	}
142	else
143	if (res > 0)
144	return 0; // Command in progress
145	else {
146	IOCommandIsComplete(pb, res);
147	return res;
148	}
149	}
150
151	int16 SerialPrimeOut(uint32 pb, uint32 dce)
152	{
153	D(bug("SerialPrimeOut pb %08lx, dce %08lx\n", pb, dce));
154	int16 res;
155
156	SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
157	if (!the_port->is_open)
158	res = notOpenErr;
159	else {
160	if (the_port->write_pending) {
161	printf("FATAL: SerialPrimeOut() called while request is pending\n");
162	res = writErr;
163	} else
164	res = the_port->prime_out(pb, dce);
165	}
166
167	if (ReadMacInt16(pb + ioTrap) & 0x0200)
168	if (res > 0) {
169	WriteMacInt16(pb + ioResult, 0);
170	return 0; // Command in progress
171	} else {
172	WriteMacInt16(pb + ioResult, res);
173	return res;
174	}
175	else
176	if (res > 0)
177	return 0; // Command in progress
178	else {
179	IOCommandIsComplete(pb, res);
180	return res;
181	}
182	}
183
184
185	/*
186	* Driver Control() routine
187	*/
188
189	int16 SerialControl(uint32 pb, uint32 dce)
190	{
191	uint16 code = ReadMacInt16(pb + csCode);
192	D(bug("SerialControl %d, pb %08lx, dce %08lx\n", code, pb, dce));
193	int16 res;
194
195	SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
196	if (!the_port->is_open)
197	res = notOpenErr;
198	else {
199	switch (code) {
200	case kSERDSetPollWrite:
201	res = noErr;
202	break;
203	default:
204	res = the_port->control(pb, dce, code);
205	break;
206	}
207	}
208
209	if (code == 1)
210	return res;
211	else if (ReadMacInt16(pb + ioTrap) & 0x0200) {
212	WriteMacInt16(pb + ioResult, res);
213	return res;
214	} else {
215	IOCommandIsComplete(pb, res);
216	return res;
217	}
218	}
219
220
221	/*
222	* Driver Status() routine
223	*/
224
225	int16 SerialStatus(uint32 pb, uint32 dce)
226	{
227	uint16 code = ReadMacInt16(pb + csCode);
228	D(bug("SerialStatus %d, pb %08lx, dce %08lx\n", code, pb, dce));
229	int16 res;
230
231	SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
232	if (!the_port->is_open)
233	res = notOpenErr;
234	else {
235	switch (code) {
236	case kSERDVersion:
237	WriteMacInt8(pb + csParam, 9); // Second-generation SerialDMA driver
238	res = noErr;
239	break;
240
241	case 0x8000:
242	WriteMacInt8(pb + csParam, 9); // Second-generation SerialDMA driver
243	WriteMacInt16(pb + csParam + 4, 0x1997); // Date of serial driver
244	WriteMacInt16(pb + csParam + 6, 0x0616);
245	res = noErr;
246	break;
247
248	default:
249	res = the_port->status(pb, dce, code);
250	break;
251	}
252	}
253
254	if (ReadMacInt16(pb + ioTrap) & 0x0200) {
255	WriteMacInt16(pb + ioResult, res);
256	return res;
257	} else {
258	IOCommandIsComplete(pb, res);
259	return res;
260	}
261	}
262
263
264	/*
265	* Driver Close() routine
266	*/
267
268	int16 SerialClose(uint32 pb, uint32 dce)
269	{
270	D(bug("SerialClose pb %08lx, dce %08lx\n", pb, dce));
271
272	// Close port if open
273	SERDPort *the_port = the_serd_port[(-(int16)ReadMacInt16(dce + dCtlRefNum)-6) >> 1];
274	if (the_port->is_open) {
275	Mac_sysfree(the_port->dt_store);
276	int16 res = the_port->close();
277	the_port->is_open = false;
278	return res;
279	} else
280	return noErr;
281	}
282
283
284	/*
285	* Serial interrupt - Prime command completed, activate deferred tasks to call IODone
286	*/
287
288	void SerialInterrupt(void)
289	{
290	D(bug("SerialIRQ\n"));
291
292	// Port 0
293	if (the_serd_port[0]->is_open) {
294	if (the_serd_port[0]->read_pending && the_serd_port[0]->read_done) {
295	Enqueue(the_serd_port[0]->input_dt, 0xd92);
296	the_serd_port[0]->read_pending = the_serd_port[0]->read_done = false;
297	}
298	if (the_serd_port[0]->write_pending && the_serd_port[0]->write_done) {
299	Enqueue(the_serd_port[0]->output_dt, 0xd92);
300	the_serd_port[0]->write_pending = the_serd_port[0]->write_done = false;
301	}
302	}
303
304	// Port 1
305	if (the_serd_port[1]->is_open) {
306	if (the_serd_port[1]->read_pending && the_serd_port[1]->read_done) {
307	Enqueue(the_serd_port[1]->input_dt, 0xd92);
308	the_serd_port[1]->read_pending = the_serd_port[1]->read_done = false;
309	}
310	if (the_serd_port[1]->write_pending && the_serd_port[1]->write_done) {
311	Enqueue(the_serd_port[1]->output_dt, 0xd92);
312	the_serd_port[1]->write_pending = the_serd_port[1]->write_done = false;
313	}
314	}
315	}
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