1/*
2 * PCBIT-D low-layer interface definitions
3 *
4 * Copyright (C) 1996 Universidade de Lisboa
5 *
6 * Written by Pedro Roque Marques (roque@di.fc.ul.pt)
7 *
8 * This software may be used and distributed according to the terms of
9 * the GNU General Public License, incorporated herein by reference.
10 */
11
12/*
13 * 19991203 - Fernando Carvalho - takion@superbofh.org
14 * Hacked to compile with egcs and run with current version of isdn modules
15 */
16
17#ifndef LAYER2_H
18#define LAYER2_H
19
20#include <linux/interrupt.h>
21
22#include <asm/byteorder.h>
23
24#define BANK1 0x0000U /* PC -> Board */
25#define BANK2 0x01ffU /* Board -> PC */
26#define BANK3 0x03feU /* Att Board */
27#define BANK4 0x03ffU /* Att PC */
28
29#define BANKLEN 0x01FFU
30
31#define LOAD_ZONE_START 0x03f8U
32#define LOAD_ZONE_END   0x03fdU
33
34#define LOAD_RETRY      18000000
35
36
37
38/* TAM - XX - C - S  - NUM */
39#define PREHDR_LEN 8
40/* TT  - M  - I - TH - TD  */
41#define FRAME_HDR_LEN  8
42
43#define MSG_CONN_REQ		0x08000100
44#define MSG_CONN_CONF		0x00000101
45#define MSG_CONN_IND		0x00000102
46#define MSG_CONN_RESP		0x08000103
47
48#define MSG_CONN_ACTV_REQ	0x08000300
49#define MSG_CONN_ACTV_CONF	0x00000301
50#define MSG_CONN_ACTV_IND	0x00000302
51#define MSG_CONN_ACTV_RESP	0x08000303
52
53#define MSG_DISC_REQ		0x08000400
54#define MSG_DISC_CONF		0x00000401
55#define MSG_DISC_IND		0x00000402
56#define MSG_DISC_RESP		0x08000403
57
58#define MSG_TDATA_REQ		0x0908E200
59#define MSG_TDATA_CONF		0x0000E201
60#define MSG_TDATA_IND		0x0000E202
61#define MSG_TDATA_RESP		0x0908E203
62
63#define MSG_SELP_REQ		0x09004000
64#define MSG_SELP_CONF		0x00004001
65
66#define MSG_ACT_TRANSP_REQ      0x0908E000
67#define MSG_ACT_TRANSP_CONF     0x0000E001
68
69#define MSG_STPROT_REQ		0x09004100
70#define MSG_STPROT_CONF		0x00004101
71
72#define MSG_PING188_REQ		0x09030500
73#define MSG_PING188_CONF        0x000005bc
74
75#define MSG_WATCH188	        0x09030400
76
77#define MSG_API_ON              0x08020102
78#define MSG_POOL_PCBIT          0x08020400
79#define MSG_POOL_PCBIT_CONF     0x00000401
80
81#define MSG_INFO_IND            0x00002602
82#define MSG_INFO_RESP           0x08002603
83
84#define MSG_DEBUG_188           0x0000ff00
85
86/*
87
88  long  4 3 2 1
89  Intel 1 2 3 4
90*/
91
92#ifdef __LITTLE_ENDIAN
93#define SET_MSG_SCMD(msg, ch)	(msg = (msg & 0xffffff00) | (((ch) & 0xff)))
94#define SET_MSG_CMD(msg, ch)	(msg = (msg & 0xffff00ff) | (((ch) & 0xff) << 8))
95#define SET_MSG_PROC(msg, ch)	(msg = (msg & 0xff00ffff) | (((ch) & 0xff) << 16))
96#define SET_MSG_CPU(msg, ch)	(msg = (msg & 0x00ffffff) | (((ch) & 0xff) << 24))
97
98#define GET_MSG_SCMD(msg)	((msg) & 0xFF)
99#define GET_MSG_CMD(msg)	((msg) >> 8 & 0xFF)
100#define GET_MSG_PROC(msg)	((msg) >> 16 & 0xFF)
101#define GET_MSG_CPU(msg)	((msg) >> 24)
102
103#else
104#error "Non-Intel CPU"
105#endif
106
107#define MAX_QUEUED 7
108
109#define SCHED_READ    0x01
110#define SCHED_WRITE   0x02
111
112#define SET_RUN_TIMEOUT 2 * HZ /* 2 seconds */
113
114struct frame_buf {
115	ulong msg;
116	unsigned int refnum;
117	unsigned int dt_len;
118	unsigned int hdr_len;
119	struct sk_buff *skb;
120	unsigned int copied;
121	struct frame_buf *next;
122};
123
124extern int pcbit_l2_write(struct pcbit_dev *dev, ulong msg, ushort refnum,
125			  struct sk_buff *skb, unsigned short hdr_len);
126
127extern irqreturn_t pcbit_irq_handler(int interrupt, void *);
128
129extern struct pcbit_dev *dev_pcbit[MAX_PCBIT_CARDS];
130
131#ifdef DEBUG
132static __inline__ void log_state(struct pcbit_dev *dev) {
133	printk(KERN_DEBUG "writeptr = %ld\n",
134	       (ulong) (dev->writeptr - dev->sh_mem));
135	printk(KERN_DEBUG "readptr  = %ld\n",
136	       (ulong) (dev->readptr - (dev->sh_mem + BANK2)));
137	printk(KERN_DEBUG "{rcv_seq=%01x, send_seq=%01x, unack_seq=%01x}\n",
138	       dev->rcv_seq, dev->send_seq, dev->unack_seq);
139}
140#endif
141
142static __inline__ struct pcbit_dev *chan2dev(struct pcbit_chan *chan)
143{
144	struct pcbit_dev *dev;
145	int i;
146
147
148	for (i = 0; i < MAX_PCBIT_CARDS; i++)
149		if ((dev = dev_pcbit[i]))
150			if (dev->b1 == chan || dev->b2 == chan)
151				return dev;
152	return NULL;
153
154}
155
156static __inline__ struct pcbit_dev *finddev(int id)
157{
158	struct pcbit_dev *dev;
159	int i;
160
161	for (i = 0; i < MAX_PCBIT_CARDS; i++)
162		if ((dev = dev_pcbit[i]))
163			if (dev->id == id)
164				return dev;
165	return NULL;
166}
167
168
169/*
170 *  Support routines for reading and writing in the board
171 */
172
173static __inline__ void pcbit_writeb(struct pcbit_dev *dev, unsigned char dt)
174{
175	writeb(dt, dev->writeptr++);
176	if (dev->writeptr == dev->sh_mem + BANKLEN)
177		dev->writeptr = dev->sh_mem;
178}
179
180static __inline__ void pcbit_writew(struct pcbit_dev *dev, unsigned short dt)
181{
182	int dist;
183
184	dist = BANKLEN - (dev->writeptr - dev->sh_mem);
185	switch (dist) {
186	case 2:
187		writew(dt, dev->writeptr);
188		dev->writeptr = dev->sh_mem;
189		break;
190	case 1:
191		writeb((u_char) (dt & 0x00ffU), dev->writeptr);
192		dev->writeptr = dev->sh_mem;
193		writeb((u_char) (dt >> 8), dev->writeptr++);
194		break;
195	default:
196		writew(dt, dev->writeptr);
197		dev->writeptr += 2;
198		break;
199	};
200}
201
202static __inline__ void memcpy_topcbit(struct pcbit_dev *dev, u_char *data,
203				      int len)
204{
205	int diff;
206
207	diff = len - (BANKLEN - (dev->writeptr - dev->sh_mem));
208
209	if (diff > 0)
210	{
211		memcpy_toio(dev->writeptr, data, len - diff);
212		memcpy_toio(dev->sh_mem, data + (len - diff), diff);
213		dev->writeptr = dev->sh_mem + diff;
214	}
215	else
216	{
217		memcpy_toio(dev->writeptr, data, len);
218
219		dev->writeptr += len;
220		if (diff == 0)
221			dev->writeptr = dev->sh_mem;
222	}
223}
224
225static __inline__ unsigned char pcbit_readb(struct pcbit_dev *dev)
226{
227	unsigned char val;
228
229	val = readb(dev->readptr++);
230	if (dev->readptr == dev->sh_mem + BANK2 + BANKLEN)
231		dev->readptr = dev->sh_mem + BANK2;
232
233	return val;
234}
235
236static __inline__ unsigned short pcbit_readw(struct pcbit_dev *dev)
237{
238	int dist;
239	unsigned short val;
240
241	dist = BANKLEN - (dev->readptr - (dev->sh_mem + BANK2));
242	switch (dist) {
243	case 2:
244		val = readw(dev->readptr);
245		dev->readptr = dev->sh_mem + BANK2;
246		break;
247	case 1:
248		val = readb(dev->readptr);
249		dev->readptr = dev->sh_mem + BANK2;
250		val = (readb(dev->readptr++) << 8) | val;
251		break;
252	default:
253		val = readw(dev->readptr);
254		dev->readptr += 2;
255		break;
256	};
257	return val;
258}
259
260static __inline__ void memcpy_frompcbit(struct pcbit_dev *dev, u_char *data, int len)
261{
262	int diff;
263
264	diff = len - (BANKLEN - (dev->readptr - (dev->sh_mem + BANK2)));
265	if (diff > 0)
266	{
267		memcpy_fromio(data, dev->readptr, len - diff);
268		memcpy_fromio(data + (len - diff), dev->sh_mem + BANK2 , diff);
269		dev->readptr = dev->sh_mem + BANK2 + diff;
270	}
271	else
272	{
273		memcpy_fromio(data, dev->readptr, len);
274		dev->readptr += len;
275		if (diff == 0)
276			dev->readptr = dev->sh_mem + BANK2;
277	}
278}
279
280
281#endif
282