summaryrefslogtreecommitdiff
path: root/drivers/isdn/hysdn/boardergo.c
blob: 160f22fa594176551c8d5d7bc1a04224463f72bf (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
/* $Id: boardergo.c,v 1.5.6.7 2001/11/06 21:58:19 kai Exp $
 *
 * Linux driver for HYSDN cards, specific routines for ergo type boards.
 *
 * Author    Werner Cornelius (werner@titro.de) for Hypercope GmbH
 * Copyright 1999 by Werner Cornelius (werner@titro.de)
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 * As all Linux supported cards Champ2, Ergo and Metro2/4 use the same
 * DPRAM interface and layout with only minor differences all related
 * stuff is done here, not in separate modules.
 *
 */

#include <linux/sched.h>
#include <linux/signal.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <asm/io.h>

#include "hysdn_defs.h"
#include "boardergo.h"

#define byteout(addr,val) outb(val,addr)
#define bytein(addr) inb(addr)

/***************************************************/
/* The cards interrupt handler. Called from system */
/***************************************************/
static irqreturn_t
ergo_interrupt(int intno, void *dev_id)
{
	hysdn_card *card = dev_id;	/* parameter from irq */
	tErgDpram *dpr;
	unsigned long flags;
	unsigned char volatile b;

	if (!card)
		return IRQ_NONE;		/* error -> spurious interrupt */
	if (!card->irq_enabled)
		return IRQ_NONE;		/* other device interrupting or irq switched off */

	save_flags(flags);
	cli();			/* no further irqs allowed */

	if (!(bytein(card->iobase + PCI9050_INTR_REG) & PCI9050_INTR_REG_STAT1)) {
		restore_flags(flags);	/* restore old state */
		return IRQ_NONE;		/* no interrupt requested by E1 */
	}
	/* clear any pending ints on the board */
	dpr = card->dpram;
	b = dpr->ToPcInt;	/* clear for ergo */
	b |= dpr->ToPcIntMetro;	/* same for metro */
	b |= dpr->ToHyInt;	/* and for champ */

	/* start kernel task immediately after leaving all interrupts */
	if (!card->hw_lock)
		schedule_work(&card->irq_queue);
	restore_flags(flags);
	return IRQ_HANDLED;
}				/* ergo_interrupt */

/******************************************************************************/
/* ergo_irq_bh is the function called by the immediate kernel task list after */
/* being activated with queue_task and no interrupts active. This task is the */
/* only one handling data transfer from or to the card after booting. The task */
/* may be queued from everywhere (interrupts included).                       */
/******************************************************************************/
static void
ergo_irq_bh(hysdn_card * card)
{
	tErgDpram *dpr;
	int again;
	unsigned long flags;

	if (card->state != CARD_STATE_RUN)
		return;		/* invalid call */

	dpr = card->dpram;	/* point to DPRAM */

	save_flags(flags);
	cli();
	if (card->hw_lock) {
		restore_flags(flags);	/* hardware currently unavailable */
		return;
	}
	card->hw_lock = 1;	/* we now lock the hardware */

	do {
		sti();		/* reenable other ints */
		again = 0;	/* assume loop not to be repeated */

		if (!dpr->ToHyFlag) {
			/* we are able to send a buffer */

			if (hysdn_sched_tx(card, dpr->ToHyBuf, &dpr->ToHySize, &dpr->ToHyChannel,
					   ERG_TO_HY_BUF_SIZE)) {
				dpr->ToHyFlag = 1;	/* enable tx */
				again = 1;	/* restart loop */
			}
		}		/* we are able to send a buffer */
		if (dpr->ToPcFlag) {
			/* a message has arrived for us, handle it */

			if (hysdn_sched_rx(card, dpr->ToPcBuf, dpr->ToPcSize, dpr->ToPcChannel)) {
				dpr->ToPcFlag = 0;	/* we worked the data */
				again = 1;	/* restart loop */
			}
		}		/* a message has arrived for us */
		cli();		/* no further ints */
		if (again) {
			dpr->ToHyInt = 1;
			dpr->ToPcInt = 1;	/* interrupt to E1 for all cards */
		} else
			card->hw_lock = 0;	/* free hardware again */
	} while (again);	/* until nothing more to do */

	restore_flags(flags);
}				/* ergo_irq_bh */


/*********************************************************/
/* stop the card (hardware reset) and disable interrupts */
/*********************************************************/
static void
ergo_stopcard(hysdn_card * card)
{
	unsigned long flags;
	unsigned char val;

	hysdn_net_release(card);	/* first release the net device if existing */
#ifdef CONFIG_HYSDN_CAPI
	hycapi_capi_stop(card);
#endif /* CONFIG_HYSDN_CAPI */
	save_flags(flags);
	cli();
	val = bytein(card->iobase + PCI9050_INTR_REG);	/* get actual value */
	val &= ~(PCI9050_INTR_REG_ENPCI | PCI9050_INTR_REG_EN1);	/* mask irq */
	byteout(card->iobase + PCI9050_INTR_REG, val);
	card->irq_enabled = 0;
	byteout(card->iobase + PCI9050_USER_IO, PCI9050_E1_RESET);	/* reset E1 processor */
	card->state = CARD_STATE_UNUSED;
	card->err_log_state = ERRLOG_STATE_OFF;		/* currently no log active */

	restore_flags(flags);
}				/* ergo_stopcard */

/**************************************************************************/
/* enable or disable the cards error log. The event is queued if possible */
/**************************************************************************/
static void
ergo_set_errlog_state(hysdn_card * card, int on)
{
	unsigned long flags;

	if (card->state != CARD_STATE_RUN) {
		card->err_log_state = ERRLOG_STATE_OFF;		/* must be off */
		return;
	}
	save_flags(flags);
	cli();

	if (((card->err_log_state == ERRLOG_STATE_OFF) && !on) ||
	    ((card->err_log_state == ERRLOG_STATE_ON) && on)) {
		restore_flags(flags);
		return;		/* nothing to do */
	}
	if (on)
		card->err_log_state = ERRLOG_STATE_START;	/* request start */
	else
		card->err_log_state = ERRLOG_STATE_STOP;	/* request stop */

	restore_flags(flags);
	schedule_work(&card->irq_queue);
}				/* ergo_set_errlog_state */

/******************************************/
/* test the cards RAM and return 0 if ok. */
/******************************************/
static const char TestText[36] = "This Message is filler, why read it";

static int
ergo_testram(hysdn_card * card)
{
	tErgDpram *dpr = card->dpram;

	memset(dpr->TrapTable, 0, sizeof(dpr->TrapTable));	/* clear all Traps */
	dpr->ToHyInt = 1;	/* E1 INTR state forced */

	memcpy(&dpr->ToHyBuf[ERG_TO_HY_BUF_SIZE - sizeof(TestText)], TestText,
	       sizeof(TestText));
	if (memcmp(&dpr->ToHyBuf[ERG_TO_HY_BUF_SIZE - sizeof(TestText)], TestText,
		   sizeof(TestText)))
		return (-1);

	memcpy(&dpr->ToPcBuf[ERG_TO_PC_BUF_SIZE - sizeof(TestText)], TestText,
	       sizeof(TestText));
	if (memcmp(&dpr->ToPcBuf[ERG_TO_PC_BUF_SIZE - sizeof(TestText)], TestText,
		   sizeof(TestText)))
		return (-1);

	return (0);
}				/* ergo_testram */

/*****************************************************************************/
/* this function is intended to write stage 1 boot image to the cards buffer */
/* this is done in two steps. First the 1024 hi-words are written (offs=0),  */
/* then the 1024 lo-bytes are written. The remaining DPRAM is cleared, the   */
/* PCI-write-buffers flushed and the card is taken out of reset.             */
/* The function then waits for a reaction of the E1 processor or a timeout.  */
/* Negative return values are interpreted as errors.                         */
/*****************************************************************************/
static int
ergo_writebootimg(struct HYSDN_CARD *card, unsigned char *buf,
			unsigned long offs)
{
	unsigned char *dst;
	tErgDpram *dpram;
	int cnt = (BOOT_IMG_SIZE >> 2);		/* number of words to move and swap (byte order!) */
	
	if (card->debug_flags & LOG_POF_CARD)
		hysdn_addlog(card, "ERGO: write bootldr offs=0x%lx ", offs);

	dst = card->dpram;	/* pointer to start of DPRAM */
	dst += (offs + ERG_DPRAM_FILL_SIZE);	/* offset in the DPRAM */
	while (cnt--) {
		*dst++ = *(buf + 1);	/* high byte */
		*dst++ = *buf;	/* low byte */
		dst += 2;	/* point to next longword */
		buf += 2;	/* buffer only filled with words */
	}

	/* if low words (offs = 2) have been written, clear the rest of the DPRAM, */
	/* flush the PCI-write-buffer and take the E1 out of reset */
	if (offs) {
		memset(card->dpram, 0, ERG_DPRAM_FILL_SIZE);	/* fill the DPRAM still not cleared */
		dpram = card->dpram;	/* get pointer to dpram structure */
		dpram->ToHyNoDpramErrLog = 0xFF;	/* write a dpram register */
		while (!dpram->ToHyNoDpramErrLog);	/* reread volatile register to flush PCI */

		byteout(card->iobase + PCI9050_USER_IO, PCI9050_E1_RUN);	/* start E1 processor */
		/* the interrupts are still masked */

		sti();
		msleep_interruptible(20);		/* Timeout 20ms */

		if (((tDpramBootSpooler *) card->dpram)->Len != DPRAM_SPOOLER_DATA_SIZE) {
			if (card->debug_flags & LOG_POF_CARD)
				hysdn_addlog(card, "ERGO: write bootldr no answer");
			return (-ERR_BOOTIMG_FAIL);
		}
	}			/* start_boot_img */
	return (0);		/* successful */
}				/* ergo_writebootimg */

/********************************************************************************/
/* ergo_writebootseq writes the buffer containing len bytes to the E1 processor */
/* using the boot spool mechanism. If everything works fine 0 is returned. In   */
/* case of errors a negative error value is returned.                           */
/********************************************************************************/
static int
ergo_writebootseq(struct HYSDN_CARD *card, unsigned char *buf, int len)
{
	tDpramBootSpooler *sp = (tDpramBootSpooler *) card->dpram;
	unsigned char *dst;
	unsigned char buflen;
	int nr_write;
	unsigned char tmp_rdptr;
	unsigned char wr_mirror;
	int i;

	if (card->debug_flags & LOG_POF_CARD)
		hysdn_addlog(card, "ERGO: write boot seq len=%d ", len);

	dst = sp->Data;		/* point to data in spool structure */
	buflen = sp->Len;	/* maximum len of spooled data */
	wr_mirror = sp->WrPtr;	/* only once read */
	sti();

	/* try until all bytes written or error */
	i = 0x1000;		/* timeout value */
	while (len) {

		/* first determine the number of bytes that may be buffered */
		do {
			tmp_rdptr = sp->RdPtr;	/* first read the pointer */
			i--;	/* decrement timeout */
		} while (i && (tmp_rdptr != sp->RdPtr));	/* wait for stable pointer */

		if (!i) {
			if (card->debug_flags & LOG_POF_CARD)
				hysdn_addlog(card, "ERGO: write boot seq timeout");
			return (-ERR_BOOTSEQ_FAIL);	/* value not stable -> timeout */
		}
		if ((nr_write = tmp_rdptr - wr_mirror - 1) < 0)
			nr_write += buflen;	/* now we got number of free bytes - 1 in buffer */

		if (!nr_write)
			continue;	/* no free bytes in buffer */

		if (nr_write > len)
			nr_write = len;		/* limit if last few bytes */
		i = 0x1000;	/* reset timeout value */

		/* now we know how much bytes we may put in the puffer */
		len -= nr_write;	/* we savely could adjust len before output */
		while (nr_write--) {
			*(dst + wr_mirror) = *buf++;	/* output one byte */
			if (++wr_mirror >= buflen)
				wr_mirror = 0;
			sp->WrPtr = wr_mirror;	/* announce the next byte to E1 */
		}		/* while (nr_write) */

	}			/* while (len) */
	return (0);
}				/* ergo_writebootseq */

/***********************************************************************************/
/* ergo_waitpofready waits for a maximum of 10 seconds for the completition of the */
/* boot process. If the process has been successful 0 is returned otherwise a     */
/* negative error code is returned.                                                */
/***********************************************************************************/
static int
ergo_waitpofready(struct HYSDN_CARD *card)
{
	tErgDpram *dpr = card->dpram;	/* pointer to DPRAM structure */
	int timecnt = 10000 / 50;	/* timeout is 10 secs max. */
	unsigned long flags;
	int msg_size;
	int i;

	if (card->debug_flags & LOG_POF_CARD)
		hysdn_addlog(card, "ERGO: waiting for pof ready");
	while (timecnt--) {
		/* wait until timeout  */

		if (dpr->ToPcFlag) {
			/* data has arrived */

			if ((dpr->ToPcChannel != CHAN_SYSTEM) ||
			    (dpr->ToPcSize < MIN_RDY_MSG_SIZE) ||
			    (dpr->ToPcSize > MAX_RDY_MSG_SIZE) ||
			    ((*(unsigned long *) dpr->ToPcBuf) != RDY_MAGIC))
				break;	/* an error occurred */

			/* Check for additional data delivered during SysReady */
			msg_size = dpr->ToPcSize - RDY_MAGIC_SIZE;
			if (msg_size > 0)
				if (EvalSysrTokData(card, dpr->ToPcBuf + RDY_MAGIC_SIZE, msg_size))
					break;

			if (card->debug_flags & LOG_POF_RECORD)
				hysdn_addlog(card, "ERGO: pof boot success");
			save_flags(flags);
			cli();

			card->state = CARD_STATE_RUN;	/* now card is running */
			/* enable the cards interrupt */
			byteout(card->iobase + PCI9050_INTR_REG,
				bytein(card->iobase + PCI9050_INTR_REG) |
			(PCI9050_INTR_REG_ENPCI | PCI9050_INTR_REG_EN1));
			card->irq_enabled = 1;	/* we are ready to receive interrupts */

			dpr->ToPcFlag = 0;	/* reset data indicator */
			dpr->ToHyInt = 1;
			dpr->ToPcInt = 1;	/* interrupt to E1 for all cards */

			restore_flags(flags);
			if ((hynet_enable & (1 << card->myid)) 
			    && (i = hysdn_net_create(card))) 
			{
				ergo_stopcard(card);
				card->state = CARD_STATE_BOOTERR;
				return (i);
			}
#ifdef CONFIG_HYSDN_CAPI
			if((i = hycapi_capi_create(card))) {
				printk(KERN_WARNING "HYSDN: failed to create capi-interface.\n");
			}
#endif /* CONFIG_HYSDN_CAPI */
			return (0);	/* success */
		}		/* data has arrived */
		sti();
		msleep_interruptible(50);		/* Timeout 50ms */
	}			/* wait until timeout */

	if (card->debug_flags & LOG_POF_CARD)
		hysdn_addlog(card, "ERGO: pof boot ready timeout");
	return (-ERR_POF_TIMEOUT);
}				/* ergo_waitpofready */



/************************************************************************************/
/* release the cards hardware. Before releasing do a interrupt disable and hardware */
/* reset. Also unmap dpram.                                                         */
/* Use only during module release.                                                  */
/************************************************************************************/
static void
ergo_releasehardware(hysdn_card * card)
{
	ergo_stopcard(card);	/* first stop the card if not already done */
	free_irq(card->irq, card);	/* release interrupt */
	release_region(card->iobase + PCI9050_INTR_REG, 1);	/* release all io ports */
	release_region(card->iobase + PCI9050_USER_IO, 1);
	vfree(card->dpram);
	card->dpram = NULL;	/* release shared mem */
}				/* ergo_releasehardware */


/*********************************************************************************/
/* acquire the needed hardware ports and map dpram. If an error occurs a nonzero */
/* value is returned.                                                            */
/* Use only during module init.                                                  */
/*********************************************************************************/
int
ergo_inithardware(hysdn_card * card)
{
	if (!request_region(card->iobase + PCI9050_INTR_REG, 1, "HYSDN")) 
		return (-1);
	if (!request_region(card->iobase + PCI9050_USER_IO, 1, "HYSDN")) {
		release_region(card->iobase + PCI9050_INTR_REG, 1);
		return (-1);	/* ports already in use */
	}
	card->memend = card->membase + ERG_DPRAM_PAGE_SIZE - 1;
	if (!(card->dpram = ioremap(card->membase, ERG_DPRAM_PAGE_SIZE))) {
		release_region(card->iobase + PCI9050_INTR_REG, 1);
		release_region(card->iobase + PCI9050_USER_IO, 1);
		return (-1);
	}

	ergo_stopcard(card);	/* disable interrupts */
	if (request_irq(card->irq, ergo_interrupt, IRQF_SHARED, "HYSDN", card)) {
		ergo_releasehardware(card); /* return the acquired hardware */
		return (-1);
	}
	/* success, now setup the function pointers */
	card->stopcard = ergo_stopcard;
	card->releasehardware = ergo_releasehardware;
	card->testram = ergo_testram;
	card->writebootimg = ergo_writebootimg;
	card->writebootseq = ergo_writebootseq;
	card->waitpofready = ergo_waitpofready;
	card->set_errlog_state = ergo_set_errlog_state;
	INIT_WORK(&card->irq_queue, (void *) (void *) ergo_irq_bh, card);

	return (0);
}				/* ergo_inithardware */