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 * hotplug / unregister issues
18 * mod_inc/dec_use_count
19 * unify parts of d/b channel usb handling
20 * file header
21 * avoid copy to isoc buffer?
22 * improve usb delay?
23 * merge l1 state machines?
24 * clean up debug
25 */
26
27#include <linux/module.h>
28#include <linux/init.h>
29#include <linux/usb.h>
30#include <linux/slab.h>
31#include "st5481.h"
32
33MODULE_DESCRIPTION("ISDN4Linux: driver for ST5481 USB ISDN adapter");
34MODULE_AUTHOR("Frode Isaksen");
35MODULE_LICENSE("GPL");
36
37static int protocol = 2;       /* EURO-ISDN Default */
38module_param(protocol, int, 0);
39
40static int number_of_leds = 2;       /* 2 LEDs on the adpater default */
41module_param(number_of_leds, int, 0);
42
43#ifdef CONFIG_HISAX_DEBUG
44static int debug = 0;
45module_param(debug, int, 0);
46#endif
47int st5481_debug;
48
49static LIST_HEAD(adapter_list);
50
51/* ======================================================================
52 * registration/deregistration with the USB layer
53 */
54
55/*
56 * This function will be called when the adapter is plugged
57 * into the USB bus.
58 */
59static int probe_st5481(struct usb_interface *intf,
60			const struct usb_device_id *id)
61{
62	struct usb_device *dev = interface_to_usbdev(intf);
63	struct st5481_adapter *adapter;
64	struct hisax_b_if *b_if[2];
65	int retval, i;
66
67	printk(KERN_INFO "st541: found adapter VendorId %04x, ProductId %04x, LEDs %d\n",
68	     le16_to_cpu(dev->descriptor.idVendor),
69	     le16_to_cpu(dev->descriptor.idProduct),
70	     number_of_leds);
71
72	adapter = kzalloc(sizeof(struct st5481_adapter), GFP_KERNEL);
73	if (!adapter)
74		return -ENOMEM;
75
76	adapter->number_of_leds = number_of_leds;
77	adapter->usb_dev = dev;
78
79	adapter->hisax_d_if.owner = THIS_MODULE;
80	adapter->hisax_d_if.ifc.priv = adapter;
81	adapter->hisax_d_if.ifc.l2l1 = st5481_d_l2l1;
82
83	for (i = 0; i < 2; i++) {
84		adapter->bcs[i].adapter = adapter;
85		adapter->bcs[i].channel = i;
86		adapter->bcs[i].b_if.ifc.priv = &adapter->bcs[i];
87		adapter->bcs[i].b_if.ifc.l2l1 = st5481_b_l2l1;
88	}
89	list_add(&adapter->list, &adapter_list);
90
91	retval = st5481_setup_usb(adapter);
92	if (retval < 0)
93		goto err;
94
95	retval = st5481_setup_d(adapter);
96	if (retval < 0)
97		goto err_usb;
98
99	retval = st5481_setup_b(&adapter->bcs[0]);
100	if (retval < 0)
101		goto err_d;
102
103	retval = st5481_setup_b(&adapter->bcs[1]);
104	if (retval < 0)
105		goto err_b;
106
107	for (i = 0; i < 2; i++)
108		b_if[i] = &adapter->bcs[i].b_if;
109
110	if (hisax_register(&adapter->hisax_d_if, b_if, "st5481_usb",
111			protocol) != 0)
112		goto err_b1;
113
114	st5481_start(adapter);
115
116	usb_set_intfdata(intf, adapter);
117	return 0;
118
119 err_b1:
120	st5481_release_b(&adapter->bcs[1]);
121 err_b:
122	st5481_release_b(&adapter->bcs[0]);
123 err_d:
124	st5481_release_d(adapter);
125 err_usb:
126	st5481_release_usb(adapter);
127 err:
128	return -EIO;
129}
130
131/*
132 * This function will be called when the adapter is removed
133 * from the USB bus.
134 */
135static void disconnect_st5481(struct usb_interface *intf)
136{
137	struct st5481_adapter *adapter = usb_get_intfdata(intf);
138
139	DBG(1,"");
140
141	usb_set_intfdata(intf, NULL);
142	if (!adapter)
143		return;
144
145	list_del(&adapter->list);
146
147	st5481_stop(adapter);
148	st5481_release_b(&adapter->bcs[1]);
149	st5481_release_b(&adapter->bcs[0]);
150	st5481_release_d(adapter);
151	// we would actually better wait for completion of outstanding urbs
152	mdelay(2);
153	st5481_release_usb(adapter);
154
155	hisax_unregister(&adapter->hisax_d_if);
156
157	kfree(adapter);
158}
159
160/*
161 * The last 4 bits in the Product Id is set with 4 pins on the chip.
162 */
163static struct usb_device_id st5481_ids[] = {
164	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x0) },
165	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x1) },
166	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x2) },
167	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x3) },
168	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x4) },
169	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x5) },
170	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x6) },
171	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x7) },
172	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x8) },
173	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0x9) },
174	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xA) },
175	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xB) },
176	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xC) },
177	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xD) },
178	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xE) },
179	{ USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID+0xF) },
180	{ }
181};
182MODULE_DEVICE_TABLE (usb, st5481_ids);
183
184static struct usb_driver st5481_usb_driver = {
185	.name =		"st5481_usb",
186	.probe =	probe_st5481,
187	.disconnect =	disconnect_st5481,
188	.id_table =	st5481_ids,
189};
190
191static int __init st5481_usb_init(void)
192{
193	int retval;
194
195#ifdef CONFIG_HISAX_DEBUG
196	st5481_debug = debug;
197#endif
198
199	printk(KERN_INFO "hisax_st5481: ST5481 USB ISDN driver $Revision: 1.1.1.1 $\n");
200
201	retval = st5481_d_init();
202	if (retval < 0)
203		goto out;
204
205	retval = usb_register(&st5481_usb_driver);
206	if (retval < 0)
207		goto out_d_exit;
208
209	return 0;
210
211 out_d_exit:
212	st5481_d_exit();
213 out:
214	return retval;
215}
216
217static void __exit st5481_usb_exit(void)
218{
219	usb_deregister(&st5481_usb_driver);
220	st5481_d_exit();
221}
222
223module_init(st5481_usb_init);
224module_exit(st5481_usb_exit);
225