1/* $Id: b1isa.c,v 1.1.1.1 2008/10/15 03:26:33 james26_jang Exp $
2 *
3 * Module for AVM B1 ISA-card.
4 *
5 * Copyright 1999 by Carsten Paeth <calle@calle.de>
6 *
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
9 *
10 */
11
12#include <linux/module.h>
13#include <linux/kernel.h>
14#include <linux/skbuff.h>
15#include <linux/delay.h>
16#include <linux/mm.h>
17#include <linux/interrupt.h>
18#include <linux/ioport.h>
19#include <linux/capi.h>
20#include <linux/init.h>
21#include <asm/io.h>
22#include "capicmd.h"
23#include "capiutil.h"
24#include "capilli.h"
25#include "avmcard.h"
26
27static char *revision = "$Revision: 1.1.1.1 $";
28
29/* ------------------------------------------------------------- */
30
31MODULE_DESCRIPTION("CAPI4Linux: Driver for AVM B1 ISA card");
32MODULE_AUTHOR("Carsten Paeth");
33MODULE_LICENSE("GPL");
34
35/* ------------------------------------------------------------- */
36
37static void b1isa_interrupt(int interrupt, void *devptr, struct pt_regs *regs)
38{
39	avmcard *card;
40
41	card = (avmcard *) devptr;
42
43	if (!card) {
44		printk(KERN_WARNING "b1_interrupt: wrong device\n");
45		return;
46	}
47	if (card->interrupt) {
48		printk(KERN_ERR "b1_interrupt: reentering interrupt hander (%s)\n", card->name);
49		return;
50	}
51
52	card->interrupt = 1;
53
54	b1_handle_interrupt(card);
55
56	card->interrupt = 0;
57}
58/* ------------------------------------------------------------- */
59
60static struct capi_driver_interface *di;
61
62/* ------------------------------------------------------------- */
63
64static void b1isa_remove_ctr(struct capi_ctr *ctrl)
65{
66	avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
67	avmcard *card = cinfo->card;
68	unsigned int port = card->port;
69
70	b1_reset(port);
71	b1_reset(port);
72
73	di->detach_ctr(ctrl);
74	free_irq(card->irq, card);
75	release_region(card->port, AVMB1_PORTLEN);
76	kfree(card->ctrlinfo);
77	kfree(card);
78
79	MOD_DEC_USE_COUNT;
80}
81
82/* ------------------------------------------------------------- */
83
84static int b1isa_add_card(struct capi_driver *driver, struct capicardparams *p)
85{
86	avmctrl_info *cinfo;
87	avmcard *card;
88	int retval;
89
90	MOD_INC_USE_COUNT;
91
92	card = (avmcard *) kmalloc(sizeof(avmcard), GFP_ATOMIC);
93
94	if (!card) {
95		printk(KERN_WARNING "b1isa: no memory.\n");
96	        MOD_DEC_USE_COUNT;
97		return -ENOMEM;
98	}
99	memset(card, 0, sizeof(avmcard));
100        cinfo = (avmctrl_info *) kmalloc(sizeof(avmctrl_info), GFP_ATOMIC);
101	if (!cinfo) {
102		printk(KERN_WARNING "b1isa: no memory.\n");
103		kfree(card);
104	        MOD_DEC_USE_COUNT;
105		return -ENOMEM;
106	}
107	memset(cinfo, 0, sizeof(avmctrl_info));
108	card->ctrlinfo = cinfo;
109	cinfo->card = card;
110	sprintf(card->name, "b1isa-%x", p->port);
111	card->port = p->port;
112	card->irq = p->irq;
113	card->cardtype = avm_b1isa;
114
115	if (check_region(card->port, AVMB1_PORTLEN)) {
116		printk(KERN_WARNING
117		       "b1isa: ports 0x%03x-0x%03x in use.\n",
118		       card->port, card->port + AVMB1_PORTLEN);
119	        kfree(card->ctrlinfo);
120		kfree(card);
121	        MOD_DEC_USE_COUNT;
122		return -EBUSY;
123	}
124	if (b1_irq_table[card->irq & 0xf] == 0) {
125		printk(KERN_WARNING "b1isa: irq %d not valid.\n", card->irq);
126	        kfree(card->ctrlinfo);
127		kfree(card);
128	        MOD_DEC_USE_COUNT;
129		return -EINVAL;
130	}
131	if (   card->port != 0x150 && card->port != 0x250
132	    && card->port != 0x300 && card->port != 0x340) {
133		printk(KERN_WARNING "b1isa: illegal port 0x%x.\n", card->port);
134	        kfree(card->ctrlinfo);
135		kfree(card);
136	        MOD_DEC_USE_COUNT;
137		return -EINVAL;
138	}
139	b1_reset(card->port);
140	if ((retval = b1_detect(card->port, card->cardtype)) != 0) {
141		printk(KERN_NOTICE "b1isa: NO card at 0x%x (%d)\n",
142					card->port, retval);
143	        kfree(card->ctrlinfo);
144		kfree(card);
145	        MOD_DEC_USE_COUNT;
146		return -EIO;
147	}
148	b1_reset(card->port);
149	b1_getrevision(card);
150
151	request_region(p->port, AVMB1_PORTLEN, card->name);
152
153	retval = request_irq(card->irq, b1isa_interrupt, 0, card->name, card);
154	if (retval) {
155		printk(KERN_ERR "b1isa: unable to get IRQ %d.\n", card->irq);
156		release_region(card->port, AVMB1_PORTLEN);
157	        kfree(card->ctrlinfo);
158		kfree(card);
159	        MOD_DEC_USE_COUNT;
160		return -EBUSY;
161	}
162
163	cinfo->capi_ctrl = di->attach_ctr(driver, card->name, cinfo);
164	if (!cinfo->capi_ctrl) {
165		printk(KERN_ERR "b1isa: attach controller failed.\n");
166		free_irq(card->irq, card);
167		release_region(card->port, AVMB1_PORTLEN);
168	        kfree(card->ctrlinfo);
169		kfree(card);
170	        MOD_DEC_USE_COUNT;
171		return -EBUSY;
172	}
173
174	printk(KERN_INFO
175		"%s: AVM B1 ISA at i/o %#x, irq %d, revision %d\n",
176		driver->name, card->port, card->irq, card->revision);
177
178	return 0;
179}
180
181static char *b1isa_procinfo(struct capi_ctr *ctrl)
182{
183	avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
184
185	if (!cinfo)
186		return "";
187	sprintf(cinfo->infobuf, "%s %s 0x%x %d r%d",
188		cinfo->cardname[0] ? cinfo->cardname : "-",
189		cinfo->version[VER_DRIVER] ? cinfo->version[VER_DRIVER] : "-",
190		cinfo->card ? cinfo->card->port : 0x0,
191		cinfo->card ? cinfo->card->irq : 0,
192		cinfo->card ? cinfo->card->revision : 0
193		);
194	return cinfo->infobuf;
195}
196
197/* ------------------------------------------------------------- */
198
199static struct capi_driver b1isa_driver = {
200    name: "b1isa",
201    revision: "0.0",
202    load_firmware: b1_load_firmware,
203    reset_ctr: b1_reset_ctr,
204    remove_ctr: b1isa_remove_ctr,
205    register_appl: b1_register_appl,
206    release_appl: b1_release_appl,
207    send_message: b1_send_message,
208
209    procinfo: b1isa_procinfo,
210    ctr_read_proc: b1ctl_read_proc,
211    driver_read_proc: 0,	/* use standard driver_read_proc */
212
213    add_card: b1isa_add_card,
214};
215
216static int __init b1isa_init(void)
217{
218	struct capi_driver *driver = &b1isa_driver;
219	char *p;
220	int retval = 0;
221
222	MOD_INC_USE_COUNT;
223
224	if ((p = strchr(revision, ':')) != 0 && p[1]) {
225		strncpy(driver->revision, p + 2, sizeof(driver->revision));
226		driver->revision[sizeof(driver->revision)-1] = 0;
227		if ((p = strchr(driver->revision, '$')) != 0 && p > driver->revision)
228			*(p-1) = 0;
229	}
230
231	printk(KERN_INFO "%s: revision %s\n", driver->name, driver->revision);
232
233        di = attach_capi_driver(driver);
234
235	if (!di) {
236		printk(KERN_ERR "%s: failed to attach capi_driver\n",
237				driver->name);
238		retval = -EIO;
239	}
240	MOD_DEC_USE_COUNT;
241	return retval;
242}
243
244static void __exit b1isa_exit(void)
245{
246    detach_capi_driver(&b1isa_driver);
247}
248
249module_init(b1isa_init);
250module_exit(b1isa_exit);
251