1/* $Id: teleint.c,v 1.16.2.5 2004/01/19 15:31:50 keil Exp $
2 *
3 * low level stuff for TeleInt isdn cards
4 *
5 * Author       Karsten Keil
6 * Copyright    by Karsten Keil      <keil@isdn4linux.de>
7 *
8 * This software may be used and distributed according to the terms
9 * of the GNU General Public License, incorporated herein by reference.
10 *
11 */
12
13#include <linux/init.h>
14#include "hisax.h"
15#include "isac.h"
16#include "hfc_2bs0.h"
17#include "isdnl1.h"
18
19static const char *TeleInt_revision = "$Revision: 1.16.2.5 $";
20
21#define byteout(addr, val) outb(val, addr)
22#define bytein(addr) inb(addr)
23
24static inline u_char
25readreg(unsigned int ale, unsigned int adr, u_char off)
26{
27	register u_char ret;
28	int max_delay = 2000;
29
30	byteout(ale, off);
31	ret = HFC_BUSY & bytein(ale);
32	while (ret && --max_delay)
33		ret = HFC_BUSY & bytein(ale);
34	if (!max_delay) {
35		printk(KERN_WARNING "TeleInt Busy not inactive\n");
36		return (0);
37	}
38	ret = bytein(adr);
39	return (ret);
40}
41
42static inline void
43readfifo(unsigned int ale, unsigned int adr, u_char off, u_char *data, int size)
44{
45	register u_char ret;
46	register int max_delay = 20000;
47	register int i;
48
49	byteout(ale, off);
50	for (i = 0; i < size; i++) {
51		ret = HFC_BUSY & bytein(ale);
52		while (ret && --max_delay)
53			ret = HFC_BUSY & bytein(ale);
54		if (!max_delay) {
55			printk(KERN_WARNING "TeleInt Busy not inactive\n");
56			return;
57		}
58		data[i] = bytein(adr);
59	}
60}
61
62
63static inline void
64writereg(unsigned int ale, unsigned int adr, u_char off, u_char data)
65{
66	register u_char ret;
67	int max_delay = 2000;
68
69	byteout(ale, off);
70	ret = HFC_BUSY & bytein(ale);
71	while (ret && --max_delay)
72		ret = HFC_BUSY & bytein(ale);
73	if (!max_delay) {
74		printk(KERN_WARNING "TeleInt Busy not inactive\n");
75		return;
76	}
77	byteout(adr, data);
78}
79
80static inline void
81writefifo(unsigned int ale, unsigned int adr, u_char off, u_char *data, int size)
82{
83	register u_char ret;
84	register int max_delay = 20000;
85	register int i;
86
87	byteout(ale, off);
88	for (i = 0; i < size; i++) {
89		ret = HFC_BUSY & bytein(ale);
90		while (ret && --max_delay)
91			ret = HFC_BUSY & bytein(ale);
92		if (!max_delay) {
93			printk(KERN_WARNING "TeleInt Busy not inactive\n");
94			return;
95		}
96		byteout(adr, data[i]);
97	}
98}
99
100/* Interface functions */
101
102static u_char
103ReadISAC(struct IsdnCardState *cs, u_char offset)
104{
105	cs->hw.hfc.cip = offset;
106	return (readreg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, offset));
107}
108
109static void
110WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value)
111{
112	cs->hw.hfc.cip = offset;
113	writereg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, offset, value);
114}
115
116static void
117ReadISACfifo(struct IsdnCardState *cs, u_char *data, int size)
118{
119	cs->hw.hfc.cip = 0;
120	readfifo(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, 0, data, size);
121}
122
123static void
124WriteISACfifo(struct IsdnCardState *cs, u_char *data, int size)
125{
126	cs->hw.hfc.cip = 0;
127	writefifo(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, 0, data, size);
128}
129
130static u_char
131ReadHFC(struct IsdnCardState *cs, int data, u_char reg)
132{
133	register u_char ret;
134
135	if (data) {
136		cs->hw.hfc.cip = reg;
137		byteout(cs->hw.hfc.addr | 1, reg);
138		ret = bytein(cs->hw.hfc.addr);
139		if (cs->debug & L1_DEB_HSCX_FIFO && (data != 2))
140			debugl1(cs, "hfc RD %02x %02x", reg, ret);
141	} else
142		ret = bytein(cs->hw.hfc.addr | 1);
143	return (ret);
144}
145
146static void
147WriteHFC(struct IsdnCardState *cs, int data, u_char reg, u_char value)
148{
149	byteout(cs->hw.hfc.addr | 1, reg);
150	cs->hw.hfc.cip = reg;
151	if (data)
152		byteout(cs->hw.hfc.addr, value);
153	if (cs->debug & L1_DEB_HSCX_FIFO && (data != 2))
154		debugl1(cs, "hfc W%c %02x %02x", data ? 'D' : 'C', reg, value);
155}
156
157static irqreturn_t
158TeleInt_interrupt(int intno, void *dev_id)
159{
160	struct IsdnCardState *cs = dev_id;
161	u_char val;
162	u_long flags;
163
164	spin_lock_irqsave(&cs->lock, flags);
165	val = readreg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, ISAC_ISTA);
166Start_ISAC:
167	if (val)
168		isac_interrupt(cs, val);
169	val = readreg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, ISAC_ISTA);
170	if (val) {
171		if (cs->debug & L1_DEB_ISAC)
172			debugl1(cs, "ISAC IntStat after IntRoutine");
173		goto Start_ISAC;
174	}
175	writereg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, ISAC_MASK, 0xFF);
176	writereg(cs->hw.hfc.addr | 1, cs->hw.hfc.addr, ISAC_MASK, 0x0);
177	spin_unlock_irqrestore(&cs->lock, flags);
178	return IRQ_HANDLED;
179}
180
181static void
182TeleInt_Timer(struct IsdnCardState *cs)
183{
184	int stat = 0;
185	u_long flags;
186
187	spin_lock_irqsave(&cs->lock, flags);
188	if (cs->bcs[0].mode) {
189		stat |= 1;
190		main_irq_hfc(&cs->bcs[0]);
191	}
192	if (cs->bcs[1].mode) {
193		stat |= 2;
194		main_irq_hfc(&cs->bcs[1]);
195	}
196	spin_unlock_irqrestore(&cs->lock, flags);
197	stat = HZ / 100;
198	if (!stat)
199		stat = 1;
200	cs->hw.hfc.timer.expires = jiffies + stat;
201	add_timer(&cs->hw.hfc.timer);
202}
203
204static void
205release_io_TeleInt(struct IsdnCardState *cs)
206{
207	del_timer(&cs->hw.hfc.timer);
208	releasehfc(cs);
209	if (cs->hw.hfc.addr)
210		release_region(cs->hw.hfc.addr, 2);
211}
212
213static void
214reset_TeleInt(struct IsdnCardState *cs)
215{
216	printk(KERN_INFO "TeleInt: resetting card\n");
217	cs->hw.hfc.cirm |= HFC_RESET;
218	byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.cirm);	/* Reset On */
219	mdelay(10);
220	cs->hw.hfc.cirm &= ~HFC_RESET;
221	byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.cirm);	/* Reset Off */
222	mdelay(10);
223}
224
225static int
226TeleInt_card_msg(struct IsdnCardState *cs, int mt, void *arg)
227{
228	u_long flags;
229	int delay;
230
231	switch (mt) {
232	case CARD_RESET:
233		spin_lock_irqsave(&cs->lock, flags);
234		reset_TeleInt(cs);
235		spin_unlock_irqrestore(&cs->lock, flags);
236		return (0);
237	case CARD_RELEASE:
238		release_io_TeleInt(cs);
239		return (0);
240	case CARD_INIT:
241		spin_lock_irqsave(&cs->lock, flags);
242		reset_TeleInt(cs);
243		inithfc(cs);
244		clear_pending_isac_ints(cs);
245		initisac(cs);
246		/* Reenable all IRQ */
247		cs->writeisac(cs, ISAC_MASK, 0);
248		cs->writeisac(cs, ISAC_CMDR, 0x41);
249		spin_unlock_irqrestore(&cs->lock, flags);
250		delay = HZ / 100;
251		if (!delay)
252			delay = 1;
253		cs->hw.hfc.timer.expires = jiffies + delay;
254		add_timer(&cs->hw.hfc.timer);
255		return (0);
256	case CARD_TEST:
257		return (0);
258	}
259	return (0);
260}
261
262int setup_TeleInt(struct IsdnCard *card)
263{
264	struct IsdnCardState *cs = card->cs;
265	char tmp[64];
266
267	strcpy(tmp, TeleInt_revision);
268	printk(KERN_INFO "HiSax: TeleInt driver Rev. %s\n", HiSax_getrev(tmp));
269	if (cs->typ != ISDN_CTYPE_TELEINT)
270		return (0);
271
272	cs->hw.hfc.addr = card->para[1] & 0x3fe;
273	cs->irq = card->para[0];
274	cs->hw.hfc.cirm = HFC_CIRM;
275	cs->hw.hfc.isac_spcr = 0x00;
276	cs->hw.hfc.cip = 0;
277	cs->hw.hfc.ctmt = HFC_CTMT | HFC_CLTIMER;
278	cs->bcs[0].hw.hfc.send = NULL;
279	cs->bcs[1].hw.hfc.send = NULL;
280	cs->hw.hfc.fifosize = 7 * 1024 + 512;
281	cs->hw.hfc.timer.function = (void *) TeleInt_Timer;
282	cs->hw.hfc.timer.data = (long) cs;
283	init_timer(&cs->hw.hfc.timer);
284	if (!request_region(cs->hw.hfc.addr, 2, "TeleInt isdn")) {
285		printk(KERN_WARNING
286		       "HiSax: TeleInt config port %x-%x already in use\n",
287		       cs->hw.hfc.addr,
288		       cs->hw.hfc.addr + 2);
289		return (0);
290	}
291	/* HW IO = IO */
292	byteout(cs->hw.hfc.addr, cs->hw.hfc.addr & 0xff);
293	byteout(cs->hw.hfc.addr | 1, ((cs->hw.hfc.addr & 0x300) >> 8) | 0x54);
294	switch (cs->irq) {
295	case 3:
296		cs->hw.hfc.cirm |= HFC_INTA;
297		break;
298	case 4:
299		cs->hw.hfc.cirm |= HFC_INTB;
300		break;
301	case 5:
302		cs->hw.hfc.cirm |= HFC_INTC;
303		break;
304	case 7:
305		cs->hw.hfc.cirm |= HFC_INTD;
306		break;
307	case 10:
308		cs->hw.hfc.cirm |= HFC_INTE;
309		break;
310	case 11:
311		cs->hw.hfc.cirm |= HFC_INTF;
312		break;
313	default:
314		printk(KERN_WARNING "TeleInt: wrong IRQ\n");
315		release_io_TeleInt(cs);
316		return (0);
317	}
318	byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.cirm);
319	byteout(cs->hw.hfc.addr | 1, cs->hw.hfc.ctmt);
320
321	printk(KERN_INFO "TeleInt: defined at 0x%x IRQ %d\n",
322	       cs->hw.hfc.addr, cs->irq);
323
324	setup_isac(cs);
325	cs->readisac = &ReadISAC;
326	cs->writeisac = &WriteISAC;
327	cs->readisacfifo = &ReadISACfifo;
328	cs->writeisacfifo = &WriteISACfifo;
329	cs->BC_Read_Reg = &ReadHFC;
330	cs->BC_Write_Reg = &WriteHFC;
331	cs->cardmsg = &TeleInt_card_msg;
332	cs->irq_func = &TeleInt_interrupt;
333	ISACVersion(cs, "TeleInt:");
334	return (1);
335}
336