1/*
2 * Driver for ST5481 USB ISDN modem
3 *
4 * Author       Frode Isaksen
5 * Copyright    2001 by Frode Isaksen      <fisaksen@bewan.com>
6 *              2001 by Kai Germaschewski  <kai.germaschewski@gmx.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/*
14 * TODO:
15 *
16 * b layer1 delay?
17 * hdlc as module
18 * hotplug / unregister issues
19 * mod_inc/dec_use_count
20 * unify parts of d/b channel usb handling
21 * file header
22 * avoid copy to isoc buffer?
23 * improve usb delay?
24 * merge l1 state machines?
25 * clean up debug
26 */
27
28#include <linux/config.h>
29#include <linux/version.h>
30#include <linux/module.h>
31#include <linux/init.h>
32#include <linux/usb.h>
33#include <linux/slab.h>
34#include "st5481.h"
35
36MODULE_DESCRIPTION("ISDN4Linux: driver for ST5481 USB ISDN adapter");
37MODULE_AUTHOR("Frode Isaksen");
38MODULE_LICENSE("GPL");
39
40static int protocol = 2;       /* EURO-ISDN Default */
41MODULE_PARM(protocol, "i");
42
43static int number_of_leds = 2;       /* 2 LEDs on the adpater default */
44MODULE_PARM(number_of_leds, "i");
45
46#ifdef CONFIG_HISAX_DEBUG
47static int debug = 0x1;
48MODULE_PARM(debug, "i");
49int st5481_debug;
50#endif
51
52static LIST_HEAD(adapter_list);
53
54/* ======================================================================
55 * registration/deregistration with the USB layer
56 */
57
58/*
59 * This function will be called when the adapter is plugged
60 * into the USB bus.
61 */
62static void * __devinit probe_st5481(struct usb_device *dev,
63				     unsigned int ifnum,
64				     const struct usb_device_id *id)
65{
66	struct st5481_adapter *adapter;
67	struct hisax_b_if *b_if[2];
68	int retval, i;
69
70	printk(KERN_INFO "st541: found adapter VendorId %04x, ProductId %04x, LEDs %d\n",
71	     dev->descriptor.idVendor, dev->descriptor.idProduct,
72	     number_of_leds);
73
74	adapter = kmalloc(sizeof(struct st5481_adapter), GFP_KERNEL);
75	if (!adapter)
76		return NULL;
77
78	memset(adapter, 0, sizeof(struct st5481_adapter));
79
80	adapter->number_of_leds = number_of_leds;
81	adapter->usb_dev = dev;
82
83	SET_MODULE_OWNER(&adapter->hisax_d_if);
84	adapter->hisax_d_if.ifc.priv = adapter;
85	adapter->hisax_d_if.ifc.l2l1 = st5481_d_l2l1;
86
87	for (i = 0; i < 2; i++) {
88		adapter->bcs[i].adapter = adapter;
89		adapter->bcs[i].channel = i;
90		adapter->bcs[i].b_if.ifc.priv = &adapter->bcs[i];
91		adapter->bcs[i].b_if.ifc.l2l1 = st5481_b_l2l1;
92	}
93	list_add(&adapter->list, &adapter_list);
94
95	retval = st5481_setup_usb(adapter);
96	if (retval < 0)
97		goto err;
98
99	retval = st5481_setup_d(adapter);
100	if (retval < 0)
101		goto err_usb;
102
103	retval = st5481_setup_b(&adapter->bcs[0]);
104	if (retval < 0)
105		goto err_d;
106
107	retval = st5481_setup_b(&adapter->bcs[1]);
108	if (retval < 0)
109		goto err_b;
110
111	for (i = 0; i < 2; i++)
112		b_if[i] = &adapter->bcs[i].b_if;
113
114	hisax_register(&adapter->hisax_d_if, b_if, "st5481_usb", protocol);
115	st5481_start(adapter);
116
117	return adapter;
118
119 err_b:
120	st5481_release_b(&adapter->bcs[0]);
121 err_d:
122	st5481_release_d(adapter);
123 err_usb:
124	st5481_release_usb(adapter);
125 err:
126	return NULL;
127}
128
129/*
130 * This function will be called when the adapter is removed
131 * from the USB bus.
132 */
133static void __devexit disconnect_st5481(struct usb_device *dev, void *arg)
134{
135	struct st5481_adapter *adapter = arg;
136
137	DBG(1,"");
138
139	list_del(&adapter->list);
140
141	st5481_stop(adapter);
142	st5481_release_b(&adapter->bcs[1]);
143	st5481_release_b(&adapter->bcs[0]);
144	st5481_release_d(adapter);
145	// we would actually better wait for completion of outstanding urbs
146	mdelay(2);
147	st5481_release_usb(adapter);
148
149	hisax_unregister(&adapter->hisax_d_if);
150
151	kfree(adapter);
152}
153
154/*
155 * The last 4 bits in the Product Id is set with 4 pins on the chip.
156 */
157static struct usb_device_id st5481_ids[] = {
158	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x0) },
159	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x1) },
160	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x2) },
161	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x3) },
162	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x4) },
163	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x5) },
164	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x6) },
165	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x7) },
166	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x8) },
167	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x9) },
168	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xA) },
169	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xB) },
170	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xC) },
171	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xD) },
172	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xE) },
173	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xF) },
174	{ }
175};
176MODULE_DEVICE_TABLE (usb, st5481_ids);
177
178static struct usb_driver st5481_usb_driver = {
179	name: "st5481_usb",
180	probe: probe_st5481,
181	disconnect: __devexit_p(disconnect_st5481),
182	id_table: st5481_ids,
183};
184
185static int __init st5481_usb_init(void)
186{
187	int retval;
188
189#ifdef CONFIG_HISAX_DEBUG
190	st5481_debug = debug;
191#endif
192
193	printk(KERN_INFO "hiax_st5481: ST5481 USB ISDN driver v0.1.0\n");
194
195	retval = st5481_d_init();
196	if (retval < 0)
197		goto out;
198
199	retval = usb_register(&st5481_usb_driver);
200	if (retval < 0)
201		goto out_d_exit;
202
203	return 0;
204
205 out_d_exit:
206	st5481_d_exit();
207 out:
208	return retval;
209}
210
211static void __exit st5481_usb_exit(void)
212{
213	usb_deregister(&st5481_usb_driver);
214}
215
216module_init(st5481_usb_init);
217module_exit(st5481_usb_exit);
218