/[gxemul]/trunk/src/devices/dev_adb.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
ViewVC logotype

Annotation of /trunk/src/devices/dev_adb.c

Parent Directory Parent Directory | Revision Log Revision Log


Revision 22 - (hide annotations)
Mon Oct 8 16:19:37 2007 UTC (16 years, 6 months ago) by dpavlin
File MIME type: text/plain
File size: 11502 byte(s)
++ trunk/HISTORY	(local)
$Id: HISTORY,v 1.1121 2006/02/18 21:03:08 debug Exp $
20051126	Cobalt and PReP now work with the 21143 NIC.
		Continuing on Alpha dyntrans things.
		Fixing some more left-shift-by-24 to unsigned.
20051127	Working on OpenFirmware emulation; major cleanup/redesign.
		Progress on MacPPC emulation: NetBSD detects two CPUs (when
		running with -n 2), framebuffer output (for text) works.
		Adding quick-hack Bandit PCI controller and "gc" interrupt
		controller for MacPPC.
20051128	Changing from a Bandit to a Uni-North controller for macppc.
		Continuing on OpenFirmware and MacPPC emulation in general
		(obio controller, and wdc attached to the obio seems to work).
20051129	More work on MacPPC emulation (adding a dummy ADB controller).
		Continuing the PCI bus cleanup (endianness and tag composition)
		and rewriting all PCI controllers' access functions.
20051130	Various minor PPC dyntrans optimizations.
		Manually inlining some parts of the framebuffer redraw routine.
		Slowly beginning the conversion of the old MIPS emulation into
		dyntrans (but this will take quite some time to get right).
		Generalizing quick_pc_to_pointers.
20051201	Documentation update (David Muse has made available a kernel
		which simplifies Debian/DECstation installation).
		Continuing on the ADB bus controller.
20051202	Beginning a rewrite of the Zilog serial controller (dev_zs).
20051203	Continuing on the zs rewrite (now called dev_z8530); conversion
		to devinit style.
		Reworking some of the input-only vs output-only vs input-output
		details of src/console.c, better warning messages, and adding
		a debug dump.
		Removing the concept of "device state"; it wasn't really used.
		Changing some debug output (-vv should now be used to show all
		details about devices and busses; not shown during normal
		startup anymore).
		Beginning on some SPARC instruction disassembly support.
20051204	Minor PPC updates (WALNUT skeleton stuff).
		Continuing on the MIPS dyntrans rewrite.
		More progress on the ADB controller (a keyboard is "detected"
		by NetBSD and OpenBSD).
		Downgrading OpenBSD/arc as a guest OS from "working" to
		"almost working" in the documentation.
		Progress on Algor emulation ("v3" PCI controller).
20051205	Minor updates.
20051207	Sorting devices according to address; this reduces complexity
		of device lookups from O(n) to O(log n) in memory_rw (but no
		real performance increase (yet) in experiments).
20051210	Beginning the work on native dyntrans backends (by making a
		simple skeleton; so far only for Alpha hosts).
20051211	Some very minor SPARC updates.
20051215	Fixing a bug in the MIPS mul (note: not mult) instruction,
		so it also works with non-64-bit emulation. (Thanks to Alec
		Voropay for noticing the problem.)
20051216	More work on the fake/empty/simple/skeleton/whatever backend;
		performance doesn't increase, so this isn't really worth it,
		but it was probably worth it to prepare for a real backend
		later.
20051219	More instr call statistics gathering and analysis stuff.
20051220	Another fix for MIPS 'mul'. Also converting mul and {d,}cl{o,z}
		to dyntrans.
		memory_ppc.c syntax error fix (noticed by Peter Valchev).
		Beginning to move out machines from src/machine.c into
		individual files in src/machines (in a way similar to the
		autodev system for devices).
20051222	Updating the documentation regarding NetBSD/pmax 3.0.
20051223	- " - NetBSD/cats 3.0.
20051225	- " - NetBSD/hpcmips 3.0.
20051226	Continuing on the machine registry redesign.
		Adding support for ARM rrx (33-bit rotate).
		Fixing some signed/unsigned issues (exposed by gcc -W).
20051227	Fixing the bug which prevented a NetBSD/prep 3.0 install kernel
		from starting (triggered when an mtmsr was the last instruction
		on a page). Unfortunately not enough to get the kernel to run
		as well as the 2.1 kernels did.
20051230	Some dyntrans refactoring.
20051231	Continuing on the machine registry redesign.
20060101-10	Continuing... moving more machines. Moving MD interrupt stuff
		from machine.c into a new src/machines/interrupts.c.
20060114	Adding various mvmeppc machine skeletons.
20060115	Continuing on mvme* stuff. NetBSD/mvmeppc prints boot messages
		(for MVME1600) and reaches the root device prompt, but no
		specific hardware devices are emulated yet.
20060116	Minor updates to the mvme1600 emulation mode; the Eagle PCI bus
		seems to work without much modification, and a 21143 can be
		detected, interrupts might work (but untested so far).
		Adding a fake MK48Txx (mkclock) device, for NetBSD/mvmeppc.
20060121	Adding an aux control register for ARM. (A BIG thank you to
		Olivier Houchard for tracking down this bug.)
20060122	Adding more ARM instructions (smulXY), and dev_iq80321_7seg.
20060124	Adding disassembly of more ARM instructions (mia*, mra/mar),
		and some semi-bogus XScale and i80321 registers.
20060201-02	Various minor updates. Moving the last machines out of
		machine.c.
20060204	Adding a -c command line option, for running debugger commands
		before the simulation starts, but after all files have been
		loaded.
		Minor iq80321-related updates.
20060209	Minor hacks (DEVINIT macro, etc).
		Preparing for the generalization of the 64-bit dyntrans address
		translation subsystem.
20060216	Adding ARM ldrd (double-register load).
20060217	Continuing on various ARM-related stuff.
20060218	More progress on the ATA/wdc emulation for NetBSD/iq80321.
		NetBSD/evbarm can now be installed :-)  Updating the docs, etc.
		Continuing on Algor emulation.

==============  RELEASE 0.3.8  ==============


1 dpavlin 22 /*
2     * Copyright (C) 2005-2006 Anders Gavare. All rights reserved.
3     *
4     * Redistribution and use in source and binary forms, with or without
5     * modification, are permitted provided that the following conditions are met:
6     *
7     * 1. Redistributions of source code must retain the above copyright
8     * notice, this list of conditions and the following disclaimer.
9     * 2. Redistributions in binary form must reproduce the above copyright
10     * notice, this list of conditions and the following disclaimer in the
11     * documentation and/or other materials provided with the distribution.
12     * 3. The name of the author may not be used to endorse or promote products
13     * derived from this software without specific prior written permission.
14     *
15     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18     * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25     * SUCH DAMAGE.
26     *
27     *
28     * $Id: dev_adb.c,v 1.8 2006/02/09 20:02:58 debug Exp $
29     *
30     * ADB (Apple Desktop Bus) controller.
31     *
32     * Based on intuition from reverse-engineering NetBSD/macppc source code,
33     * so it probably only works with that OS.
34     *
35     * The comment "OK" means that 100% of the functionality used by NetBSD/macppc
36     * is covered.
37     *
38     * TODO:
39     * o) Clean up, don't hardcode values.
40     * o) Convert into a separate controller, bus, device architecture.
41     */
42    
43     #include <stdio.h>
44     #include <stdlib.h>
45     #include <string.h>
46     #include <sys/time.h>
47    
48     #include "console.h"
49     #include "cpu.h"
50     #include "device.h"
51     #include "machine.h"
52     #include "memory.h"
53     #include "misc.h"
54    
55     #include "adb_viareg.h"
56    
57    
58     #define debug fatal
59     /* #define ADB_DEBUG */
60    
61    
62     #define TICK_SHIFT 17
63     #define DEV_ADB_LENGTH 0x2000
64    
65     #define N_VIA_REGS 0x10
66     #define VIA_REG_SHIFT 9
67    
68     #define MAX_BUF 100
69    
70    
71     static char *via_regname[N_VIA_REGS] = {
72     "vBufB", "vBufA", "vDirB", "vDirA",
73     "vT1C", "vT1CH", "vT1L", "vT1LH",
74     "vT2C", "vT2CH", "vSR", "vACR",
75     "vPCR", "vIFR", "vIER", "(unknown)" };
76    
77     struct adb_data {
78     int irq_nr;
79     int int_asserted;
80    
81     int kbd_dev;
82    
83     long long transfer_nr;
84    
85     uint8_t reg[N_VIA_REGS];
86    
87     int cur_output_offset;
88     uint8_t output_buf[MAX_BUF];
89    
90     int cur_input_offset;
91     int cur_input_length;
92     uint8_t input_buf[MAX_BUF];
93    
94     int dir;
95     int int_enable;
96     int ack; /* last ack state */
97     int tip; /* transfer in progress */
98     };
99    
100     #define DIR_INPUT 0
101     #define DIR_OUTPUT 1
102    
103     #define BUFB_nINTR 0x08
104     #define BUFB_ACK 0x10
105     #define BUFB_nTIP 0x20
106     #define IFR_SR 0x04
107     #define IFR_ANY 0x80
108     #define ACR_SR_OUT 0x10
109    
110    
111    
112     /*
113     * dev_adb_tick():
114     */
115     void dev_adb_tick(struct cpu *cpu, void *extra)
116     {
117     struct adb_data *d = extra;
118     int a;
119    
120     a = d->reg[vIFR >> VIA_REG_SHIFT] & IFR_ANY;
121     if (a == IFR_ANY && d->int_enable)
122     a = 1;
123    
124     if (a)
125     cpu_interrupt(cpu, d->irq_nr);
126     else if (d->int_asserted)
127     cpu_interrupt_ack(cpu, d->irq_nr);
128    
129     d->int_asserted = a;
130     }
131    
132    
133     /*
134     * adb_reset():
135     *
136     * Reset registers to default values.
137     */
138     static void adb_reset(struct adb_data *d)
139     {
140     d->kbd_dev = 2;
141    
142     memset(d->reg, 0, sizeof(d->reg));
143     d->reg[vBufB >> VIA_REG_SHIFT] = BUFB_nINTR | BUFB_nTIP;
144    
145     d->cur_output_offset = 0;
146     memset(d->output_buf, 0, sizeof(d->output_buf));
147    
148     d->dir = 0;
149     d->int_enable = 0;
150     d->ack = 0;
151     d->tip = 0;
152     }
153    
154    
155     /*
156     * adb_process_cmd():
157     *
158     * This function should be called whenever a complete ADB command has been
159     * received.
160     */
161     static void adb_process_cmd(struct cpu *cpu, struct adb_data *d)
162     {
163     int i, reg, dev;
164    
165     debug("[ adb: COMMAND:");
166     for (i=0; i<d->cur_output_offset; i++)
167     debug(" %02x", d->output_buf[i]);
168     debug(" ]\n");
169    
170     if (d->cur_output_offset < 2) {
171     fatal("[ adb: WEIRD output length: %i ]\n",
172     d->cur_output_offset);
173     exit(1);
174     }
175    
176     switch (d->output_buf[0]) {
177    
178     case 0: /* ADB commands: */
179     if (d->output_buf[1] == 0x00) {
180     /* Reset. */
181     return;
182     }
183     if ((d->output_buf[1] & 0x0c) == 0x0c) {
184     /* ADBTALK: */
185     reg = d->output_buf[1] & 3;
186     dev = d->output_buf[1] >> 4;
187     fatal("dev=%i reg=%i\n", dev, reg);
188     /* Default values: nothing here */
189     d->input_buf[0] = 0x00;
190     d->input_buf[1] = 0x00;
191     d->input_buf[2] = d->output_buf[1];
192     d->cur_input_length = 3;
193     if (dev == d->kbd_dev) {
194     /* Keyboard. */
195     d->input_buf[0] = 0x01;
196     d->input_buf[1] = 0x01;
197     d->input_buf[2] = d->output_buf[1];
198     d->input_buf[3] = 0x01;
199     d->input_buf[4] = 0x01;
200     d->cur_input_length = 5;
201     }
202     } else if ((d->output_buf[1] & 0x0c) == 0x08) {
203     int new_dev_pos = d->output_buf[2] & 15;
204     /* ADBLISTEN: */
205     if ((d->output_buf[1] >> 4) != d->kbd_dev) {
206     fatal("[ adb: ADBLISTEN not to kbd ]\n");
207     exit(1);
208     }
209     if (d->output_buf[3] != 0xfe ||
210     (d->output_buf[2] & 0xf0) != 0x60) {
211     fatal("[ adb: unknown ADBLISTEN ]\n");
212     exit(1);
213     }
214     /* Move device. */
215     d->kbd_dev = new_dev_pos;
216     } else {
217     fatal("[ adb: unknown ADB command? ]\n");
218     exit(1);
219     }
220     break;
221    
222     case 1: /* PRAM/RTC: */
223     if (d->cur_output_offset == 3 &&
224     d->output_buf[1] == 0x01 &&
225     d->output_buf[2] == 0x01) {
226     /* Autopoll: */
227     d->input_buf[0] = 0x00;
228     d->input_buf[1] = 0x00;
229     d->input_buf[2] = d->output_buf[1];
230     d->cur_input_length = 3;
231     } else if (d->cur_output_offset == 2 &&
232     d->output_buf[1] == 0x03) {
233     /* Read RTC date/time: */
234     struct timeval tv;
235     gettimeofday(&tv, NULL);
236     d->input_buf[0] = tv.tv_sec >> 24;
237     d->input_buf[1] = tv.tv_sec >> 16;
238     d->input_buf[2] = tv.tv_sec >> 8;
239     d->input_buf[3] = tv.tv_sec;
240     d->cur_input_length = 4;
241     } else if (d->cur_output_offset == 2 &&
242     d->output_buf[1] == 0x11) {
243     /* Reboot. */
244     fatal("[ adb: reboot. TODO: make this nicer ]\n");
245     exit(1);
246     } else {
247     fatal("[ adb: UNIMPLEMENTED PRAM/RTC command ]\n");
248     exit(1);
249     }
250     break;
251    
252     default:fatal("[ adb: UNKNOWN command type 0x%02x ]\n",
253     d->output_buf[0]);
254     exit(1);
255     }
256    
257     d->reg[vBufB >> VIA_REG_SHIFT] &= ~BUFB_nINTR;
258     d->reg[vIFR >> VIA_REG_SHIFT] |= IFR_ANY | IFR_SR;
259     d->reg[vSR >> VIA_REG_SHIFT] = 0x00; /* Dummy. */
260     }
261    
262    
263     /*
264     * adb_transfer():
265     *
266     * This function should be called whenever a new transfer is started, a
267     * transfer is finished, or when the next byte in a transfer should be
268     * sent/received.
269     */
270     static void adb_transfer(struct cpu *cpu, struct adb_data *d, int state_change)
271     {
272     unsigned char c = 0x00;
273    
274     if (state_change) {
275     if (d->tip == 0) {
276     debug("[ adb: transfer #%lli done ]\n",
277     (long long)d->transfer_nr);
278     if (d->cur_output_offset > 0)
279     adb_process_cmd(cpu, d);
280     d->transfer_nr ++;
281     return;
282     }
283     debug("[ adb: starting transfer #%lli: %s ]\n", (long long)
284     d->transfer_nr, d->dir == DIR_INPUT? "INPUT" : "OUTPUT");
285     d->cur_input_offset = d->cur_output_offset = 0;
286     }
287    
288     debug("[ adb: transfer #%lli: ", (long long)d->transfer_nr);
289    
290     switch (d->dir) {
291    
292     case DIR_INPUT:
293     if (d->cur_input_offset >= d->cur_input_length)
294     fatal("[ adb: INPUT beyond end of data? ]\n");
295     else
296     c = d->input_buf[d->cur_input_offset ++];
297     debug("input 0x%02x", c);
298     d->reg[vSR >> VIA_REG_SHIFT] = c;
299     d->reg[vIFR >> VIA_REG_SHIFT] |= IFR_ANY | IFR_SR;
300     if (d->cur_input_offset >= d->cur_input_length)
301     d->reg[vBufB >> VIA_REG_SHIFT] |= BUFB_nINTR;
302     break;
303    
304     case DIR_OUTPUT:
305     c = d->reg[vSR >> VIA_REG_SHIFT];
306     debug("output 0x%02x", c);
307     d->reg[vIFR >> VIA_REG_SHIFT] |= IFR_ANY | IFR_SR;
308     d->reg[vBufB >> VIA_REG_SHIFT] |= BUFB_nINTR;
309     d->output_buf[d->cur_output_offset ++] = c;
310     break;
311     }
312    
313     debug(" ]\n");
314     }
315    
316    
317     /*
318     * dev_adb_access():
319     */
320     DEVICE_ACCESS(adb)
321     {
322     uint64_t idata = 0, odata = 0;
323     struct adb_data *d = extra;
324     uint8_t old = 0;
325    
326     if (writeflag == MEM_WRITE)
327     idata = memory_readmax64(cpu, data, len);
328    
329     #ifdef ADB_DEBUG
330     if ((relative_addr & ((1 << VIA_REG_SHIFT) - 1)) != 0)
331     fatal("[ adb: %s non-via register? offset 0x%x ]\n",
332     writeflag == MEM_READ? "read from" : "write to",
333     (int)relative_addr);
334     else if (writeflag == MEM_READ)
335     fatal("[ adb: read from %s: 0x%02x ]\n",
336     via_regname[relative_addr >> VIA_REG_SHIFT],
337     (int)d->reg[relative_addr >> VIA_REG_SHIFT]);
338     else
339     fatal("[ adb: write to %s: 0x%02x ]\n", via_regname[
340     relative_addr >> VIA_REG_SHIFT], (int)idata);
341     #endif
342    
343     if (writeflag == MEM_READ)
344     odata = d->reg[relative_addr >> VIA_REG_SHIFT];
345     else {
346     old = d->reg[relative_addr >> VIA_REG_SHIFT];
347     switch (relative_addr) {
348     case vIFR:
349     /*
350     * vIFR is write-ones-to-clear, and the highest bit
351     * (IFR_ANY) is set if any of the lower bits are set.
352     */
353     d->reg[relative_addr >> VIA_REG_SHIFT] &= ~(idata|0x80);
354     if (d->reg[relative_addr >> VIA_REG_SHIFT] & 0x7f)
355     d->reg[relative_addr >> VIA_REG_SHIFT] |= 0x80;
356     break;
357     default:
358     d->reg[relative_addr >> VIA_REG_SHIFT] = idata;
359     }
360     }
361    
362     switch (relative_addr) {
363    
364     case vBufB:
365     /* OK */
366     if (writeflag == MEM_WRITE) {
367     int old_tip = d->tip;
368     int old_ack = d->ack;
369     if (idata & BUFB_nINTR)
370     idata &= ~BUFB_nINTR;
371     d->ack = 0;
372     if (idata & BUFB_ACK) {
373     idata &= ~BUFB_ACK;
374     d->ack = 1;
375     }
376     d->tip = 1;
377     if (idata & BUFB_nTIP) {
378     idata &= ~BUFB_nTIP;
379     d->tip = 0;
380     }
381     if (idata != 0)
382     fatal("[ adb: WARNING! UNIMPLEMENTED bits in"
383     " vBufB: 0x%02x ]\n", (int)idata);
384     if (old_tip != d->tip)
385     adb_transfer(cpu, d, 1);
386     else if (old_ack != d->ack)
387     adb_transfer(cpu, d, 0);
388     }
389     break;
390    
391     case vDirB:
392     break;
393    
394     case vSR:
395     /* Clear the SR interrupt flag, if set: */
396     d->reg[vIFR >> VIA_REG_SHIFT] &= ~IFR_SR;
397     break;
398    
399     case vACR:
400     /* OK */
401     if (writeflag == MEM_WRITE) {
402     if (idata & ACR_SR_OUT)
403     d->dir = DIR_OUTPUT;
404     else
405     d->dir = DIR_INPUT;
406     }
407     break;
408    
409     case vIFR:
410     /* OK */
411     break;
412    
413     case vIER:
414     /* OK */
415     if (writeflag == MEM_WRITE) {
416     d->int_enable = idata & 0x80? 1 : 0;
417     if (idata != 0x04 && idata != 0x84)
418     fatal("[ adb: WARNING! vIER value 0x%x is"
419     " UNKNOWN ]\n", (int)idata);
420     }
421     break;
422    
423     default:if ((relative_addr & ((1 << VIA_REG_SHIFT) - 1)) != 0)
424     fatal("[ adb: %s non-via register? offset 0x%x ]\n",
425     writeflag == MEM_READ? "read from" : "write to",
426     (int)relative_addr);
427     else if (writeflag == MEM_READ)
428     fatal("[ adb: READ from UNIMPLEMENTED %s ]\n",
429     via_regname[relative_addr >> VIA_REG_SHIFT]);
430     else
431     fatal("[ adb: WRITE to UNIMPLEMENTED %s: 0x%x ]\n",
432     via_regname[relative_addr >> VIA_REG_SHIFT],
433     (int)idata);
434     exit(1);
435     }
436    
437     if (writeflag == MEM_READ)
438     memory_writemax64(cpu, data, len, odata);
439    
440     return 1;
441     }
442    
443    
444     DEVINIT(adb)
445     {
446     struct adb_data *d = malloc(sizeof(struct adb_data));
447    
448     if (d == NULL) {
449     fprintf(stderr, "out of memory\n");
450     exit(1);
451     }
452     memset(d, 0, sizeof(struct adb_data));
453     d->irq_nr = devinit->irq_nr;
454    
455     adb_reset(d);
456    
457     memory_device_register(devinit->machine->memory, devinit->name,
458     devinit->addr, DEV_ADB_LENGTH, dev_adb_access, d, DM_DEFAULT, NULL);
459     machine_add_tickfunction(devinit->machine, dev_adb_tick, d, TICK_SHIFT);
460    
461     return 1;
462     }
463    

  ViewVC Help
Powered by ViewVC 1.1.26