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22#include <linux/module.h>
23#include <linux/etherdevice.h>
24
25#include "usbatm.h"
26
27
28#define XUSBATM_DRIVERS_MAX 8
29
30#define XUSBATM_PARM(name, type, parmtype, desc) \
31 static type name[XUSBATM_DRIVERS_MAX]; \
32 static unsigned int num_##name; \
33 module_param_array(name, parmtype, &num_##name, 0444); \
34 MODULE_PARM_DESC(name, desc)
35
36XUSBATM_PARM(vendor, unsigned short, ushort, "USB device vendor");
37XUSBATM_PARM(product, unsigned short, ushort, "USB device product");
38
39XUSBATM_PARM(rx_endpoint, unsigned char, byte, "rx endpoint number");
40XUSBATM_PARM(tx_endpoint, unsigned char, byte, "tx endpoint number");
41XUSBATM_PARM(rx_padding, unsigned char, byte, "rx padding (default 0)");
42XUSBATM_PARM(tx_padding, unsigned char, byte, "tx padding (default 0)");
43XUSBATM_PARM(rx_altsetting, unsigned char, byte, "rx altsetting (default 0)");
44XUSBATM_PARM(tx_altsetting, unsigned char, byte, "rx altsetting (default 0)");
45
46static const char xusbatm_driver_name[] = "xusbatm";
47
48static struct usbatm_driver xusbatm_drivers[XUSBATM_DRIVERS_MAX];
49static struct usb_device_id xusbatm_usb_ids[XUSBATM_DRIVERS_MAX + 1];
50static struct usb_driver xusbatm_usb_driver;
51
52static struct usb_interface *xusbatm_find_intf(struct usb_device *usb_dev, int altsetting, u8 ep)
53{
54 struct usb_host_interface *alt;
55 struct usb_interface *intf;
56 int i, j;
57
58 for (i = 0; i < usb_dev->actconfig->desc.bNumInterfaces; i++)
59 if ((intf = usb_dev->actconfig->interface[i]) && (alt = usb_altnum_to_altsetting(intf, altsetting)))
60 for (j = 0; j < alt->desc.bNumEndpoints; j++)
61 if (alt->endpoint[j].desc.bEndpointAddress == ep)
62 return intf;
63 return NULL;
64}
65
66static int xusbatm_capture_intf(struct usbatm_data *usbatm, struct usb_device *usb_dev,
67 struct usb_interface *intf, int altsetting, int claim)
68{
69 int ifnum = intf->altsetting->desc.bInterfaceNumber;
70 int ret;
71
72 if (claim && (ret = usb_driver_claim_interface(&xusbatm_usb_driver, intf, usbatm))) {
73 usb_err(usbatm, "%s: failed to claim interface %2d (%d)!\n", __func__, ifnum, ret);
74 return ret;
75 }
76 if ((ret = usb_set_interface(usb_dev, ifnum, altsetting))) {
77 usb_err(usbatm, "%s: altsetting %2d for interface %2d failed (%d)!\n", __func__, altsetting, ifnum, ret);
78 return ret;
79 }
80 return 0;
81}
82
83static void xusbatm_release_intf(struct usb_device *usb_dev, struct usb_interface *intf, int claimed)
84{
85 if (claimed) {
86 usb_set_intfdata(intf, NULL);
87 usb_driver_release_interface(&xusbatm_usb_driver, intf);
88 }
89}
90
91static int xusbatm_bind(struct usbatm_data *usbatm,
92 struct usb_interface *intf, const struct usb_device_id *id)
93{
94 struct usb_device *usb_dev = interface_to_usbdev(intf);
95 int drv_ix = id - xusbatm_usb_ids;
96 int rx_alt = rx_altsetting[drv_ix];
97 int tx_alt = tx_altsetting[drv_ix];
98 struct usb_interface *rx_intf = xusbatm_find_intf(usb_dev, rx_alt, rx_endpoint[drv_ix]);
99 struct usb_interface *tx_intf = xusbatm_find_intf(usb_dev, tx_alt, tx_endpoint[drv_ix]);
100 int ret;
101
102 usb_dbg(usbatm, "%s: binding driver %d: vendor %04x product %04x"
103 " rx: ep %02x padd %d alt %2d tx: ep %02x padd %d alt %2d\n",
104 __func__, drv_ix, vendor[drv_ix], product[drv_ix],
105 rx_endpoint[drv_ix], rx_padding[drv_ix], rx_alt,
106 tx_endpoint[drv_ix], tx_padding[drv_ix], tx_alt);
107
108 if (!rx_intf || !tx_intf) {
109 if (!rx_intf)
110 usb_dbg(usbatm, "%s: no interface contains endpoint %02x in altsetting %2d\n",
111 __func__, rx_endpoint[drv_ix], rx_alt);
112 if (!tx_intf)
113 usb_dbg(usbatm, "%s: no interface contains endpoint %02x in altsetting %2d\n",
114 __func__, tx_endpoint[drv_ix], tx_alt);
115 return -ENODEV;
116 }
117
118 if ((rx_intf != intf) && (tx_intf != intf))
119 return -ENODEV;
120
121 if ((rx_intf == tx_intf) && (rx_alt != tx_alt)) {
122 usb_err(usbatm, "%s: altsettings clash on interface %2d (%2d vs %2d)!\n", __func__,
123 rx_intf->altsetting->desc.bInterfaceNumber, rx_alt, tx_alt);
124 return -EINVAL;
125 }
126
127 usb_dbg(usbatm, "%s: rx If#=%2d; tx If#=%2d\n", __func__,
128 rx_intf->altsetting->desc.bInterfaceNumber,
129 tx_intf->altsetting->desc.bInterfaceNumber);
130
131 if ((ret = xusbatm_capture_intf(usbatm, usb_dev, rx_intf, rx_alt, rx_intf != intf)))
132 return ret;
133
134 if ((tx_intf != rx_intf) && (ret = xusbatm_capture_intf(usbatm, usb_dev, tx_intf, tx_alt, tx_intf != intf))) {
135 xusbatm_release_intf(usb_dev, rx_intf, rx_intf != intf);
136 return ret;
137 }
138
139 return 0;
140}
141
142static void xusbatm_unbind(struct usbatm_data *usbatm,
143 struct usb_interface *intf)
144{
145 struct usb_device *usb_dev = interface_to_usbdev(intf);
146 int i;
147
148 usb_dbg(usbatm, "%s entered\n", __func__);
149
150 for (i = 0; i < usb_dev->actconfig->desc.bNumInterfaces; i++) {
151 struct usb_interface *cur_intf = usb_dev->actconfig->interface[i];
152
153 if (cur_intf && (usb_get_intfdata(cur_intf) == usbatm)) {
154 usb_set_intfdata(cur_intf, NULL);
155 usb_driver_release_interface(&xusbatm_usb_driver, cur_intf);
156 }
157 }
158}
159
160static int xusbatm_atm_start(struct usbatm_data *usbatm,
161 struct atm_dev *atm_dev)
162{
163 atm_dbg(usbatm, "%s entered\n", __func__);
164
165
166 random_ether_addr(atm_dev->esi);
167
168 return 0;
169}
170
171
172static int xusbatm_usb_probe(struct usb_interface *intf,
173 const struct usb_device_id *id)
174{
175 return usbatm_usb_probe(intf, id,
176 xusbatm_drivers + (id - xusbatm_usb_ids));
177}
178
179static struct usb_driver xusbatm_usb_driver = {
180 .name = xusbatm_driver_name,
181 .probe = xusbatm_usb_probe,
182 .disconnect = usbatm_usb_disconnect,
183 .id_table = xusbatm_usb_ids
184};
185
186static int __init xusbatm_init(void)
187{
188 int i;
189
190 dbg("xusbatm_init");
191
192 if (!num_vendor ||
193 num_vendor != num_product ||
194 num_vendor != num_rx_endpoint ||
195 num_vendor != num_tx_endpoint) {
196 printk(KERN_WARNING "xusbatm: malformed module parameters\n");
197 return -EINVAL;
198 }
199
200 for (i = 0; i < num_vendor; i++) {
201 rx_endpoint[i] |= USB_DIR_IN;
202 tx_endpoint[i] &= USB_ENDPOINT_NUMBER_MASK;
203
204 xusbatm_usb_ids[i].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
205 xusbatm_usb_ids[i].idVendor = vendor[i];
206 xusbatm_usb_ids[i].idProduct = product[i];
207
208 xusbatm_drivers[i].driver_name = xusbatm_driver_name;
209 xusbatm_drivers[i].bind = xusbatm_bind;
210 xusbatm_drivers[i].unbind = xusbatm_unbind;
211 xusbatm_drivers[i].atm_start = xusbatm_atm_start;
212 xusbatm_drivers[i].bulk_in = rx_endpoint[i];
213 xusbatm_drivers[i].bulk_out = tx_endpoint[i];
214 xusbatm_drivers[i].rx_padding = rx_padding[i];
215 xusbatm_drivers[i].tx_padding = tx_padding[i];
216 }
217
218 return usb_register(&xusbatm_usb_driver);
219}
220module_init(xusbatm_init);
221
222static void __exit xusbatm_exit(void)
223{
224 dbg("xusbatm_exit entered");
225
226 usb_deregister(&xusbatm_usb_driver);
227}
228module_exit(xusbatm_exit);
229
230MODULE_AUTHOR("Roman Kagan, Duncan Sands");
231MODULE_DESCRIPTION("Driver for USB ADSL modems initialized in userspace");
232MODULE_LICENSE("GPL");
233MODULE_VERSION("0.1");
234
