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
33 MODULE_DESCRIPTION("ISDN4Linux: driver for ST5481 USB ISDN adapter");
34 MODULE_AUTHOR("Frode Isaksen");
35 MODULE_LICENSE("GPL");
36
37 static int protocol = 2; /* EURO-ISDN Default */
38 module_param(protocol, int, 0);
39
40 static int number_of_leds = 2; /* 2 LEDs on the adpater default */
41 module_param(number_of_leds, int, 0);
42
43 #ifdef CONFIG_HISAX_DEBUG
44 static int debug = 0;
45 module_param(debug, int, 0);
46 #endif
47 int st5481_debug;
48
49 /* ======================================================================
50 * registration/deregistration with the USB layer
51 */
52
53 /*
54 * This function will be called when the adapter is plugged
55 * into the USB bus.
56 */
probe_st5481(struct usb_interface * intf,const struct usb_device_id * id)57 static int probe_st5481(struct usb_interface *intf,
58 const struct usb_device_id *id)
59 {
60 struct usb_device *dev = interface_to_usbdev(intf);
61 struct st5481_adapter *adapter;
62 struct hisax_b_if *b_if[2];
63 int retval, i;
64
65 printk(KERN_INFO "st541: found adapter VendorId %04x, ProductId %04x, LEDs %d\n",
66 le16_to_cpu(dev->descriptor.idVendor),
67 le16_to_cpu(dev->descriptor.idProduct),
68 number_of_leds);
69
70 adapter = kzalloc(sizeof(struct st5481_adapter), GFP_KERNEL);
71 if (!adapter)
72 return -ENOMEM;
73
74 adapter->number_of_leds = number_of_leds;
75 adapter->usb_dev = dev;
76
77 adapter->hisax_d_if.owner = THIS_MODULE;
78 adapter->hisax_d_if.ifc.priv = adapter;
79 adapter->hisax_d_if.ifc.l2l1 = st5481_d_l2l1;
80
81 for (i = 0; i < 2; i++) {
82 adapter->bcs[i].adapter = adapter;
83 adapter->bcs[i].channel = i;
84 adapter->bcs[i].b_if.ifc.priv = &adapter->bcs[i];
85 adapter->bcs[i].b_if.ifc.l2l1 = st5481_b_l2l1;
86 }
87
88 retval = st5481_setup_usb(adapter);
89 if (retval < 0)
90 goto err;
91
92 retval = st5481_setup_d(adapter);
93 if (retval < 0)
94 goto err_usb;
95
96 retval = st5481_setup_b(&adapter->bcs[0]);
97 if (retval < 0)
98 goto err_d;
99
100 retval = st5481_setup_b(&adapter->bcs[1]);
101 if (retval < 0)
102 goto err_b;
103
104 for (i = 0; i < 2; i++)
105 b_if[i] = &adapter->bcs[i].b_if;
106
107 if (hisax_register(&adapter->hisax_d_if, b_if, "st5481_usb",
108 protocol) != 0)
109 goto err_b1;
110
111 st5481_start(adapter);
112
113 usb_set_intfdata(intf, adapter);
114 return 0;
115
116 err_b1:
117 st5481_release_b(&adapter->bcs[1]);
118 err_b:
119 st5481_release_b(&adapter->bcs[0]);
120 err_d:
121 st5481_release_d(adapter);
122 err_usb:
123 st5481_release_usb(adapter);
124 err:
125 kfree(adapter);
126 return -EIO;
127 }
128
129 /*
130 * This function will be called when the adapter is removed
131 * from the USB bus.
132 */
disconnect_st5481(struct usb_interface * intf)133 static void disconnect_st5481(struct usb_interface *intf)
134 {
135 struct st5481_adapter *adapter = usb_get_intfdata(intf);
136
137 DBG(1, "");
138
139 usb_set_intfdata(intf, NULL);
140 if (!adapter)
141 return;
142
143 st5481_stop(adapter);
144 st5481_release_b(&adapter->bcs[1]);
145 st5481_release_b(&adapter->bcs[0]);
146 st5481_release_d(adapter);
147 // we would actually better wait for completion of outstanding urbs
148 mdelay(2);
149 st5481_release_usb(adapter);
150
151 hisax_unregister(&adapter->hisax_d_if);
152
153 kfree(adapter);
154 }
155
156 /*
157 * The last 4 bits in the Product Id is set with 4 pins on the chip.
158 */
159 static struct usb_device_id st5481_ids[] = {
160 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x0) },
161 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x1) },
162 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x2) },
163 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x3) },
164 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x4) },
165 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x5) },
166 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x6) },
167 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x7) },
168 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x8) },
169 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0x9) },
170 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xA) },
171 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xB) },
172 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xC) },
173 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xD) },
174 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xE) },
175 { USB_DEVICE(ST_VENDOR_ID, ST5481_PRODUCT_ID + 0xF) },
176 { }
177 };
178 MODULE_DEVICE_TABLE(usb, st5481_ids);
179
180 static struct usb_driver st5481_usb_driver = {
181 .name = "st5481_usb",
182 .probe = probe_st5481,
183 .disconnect = disconnect_st5481,
184 .id_table = st5481_ids,
185 .disable_hub_initiated_lpm = 1,
186 };
187
st5481_usb_init(void)188 static int __init st5481_usb_init(void)
189 {
190 int retval;
191
192 #ifdef CONFIG_HISAX_DEBUG
193 st5481_debug = debug;
194 #endif
195
196 printk(KERN_INFO "hisax_st5481: ST5481 USB ISDN driver $Revision: 2.4.2.3 $\n");
197
198 retval = st5481_d_init();
199 if (retval < 0)
200 goto out;
201
202 retval = usb_register(&st5481_usb_driver);
203 if (retval < 0)
204 goto out_d_exit;
205
206 return 0;
207
208 out_d_exit:
209 st5481_d_exit();
210 out:
211 return retval;
212 }
213
st5481_usb_exit(void)214 static void __exit st5481_usb_exit(void)
215 {
216 usb_deregister(&st5481_usb_driver);
217 st5481_d_exit();
218 }
219
220 module_init(st5481_usb_init);
221 module_exit(st5481_usb_exit);
222