1 /*
2 * Copyright (C) 2003-2008 Takahiro Hirofuchi
3 *
4 * This is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
17 * USA.
18 */
19
20 #include <linux/platform_device.h>
21 #include "../../usb/core/hcd.h"
22
23
24 struct vhci_device {
25 struct usb_device *udev;
26
27 /*
28 * devid specifies a remote usb device uniquely instead
29 * of combination of busnum and devnum.
30 */
31 __u32 devid;
32
33 /* speed of a remote device */
34 enum usb_device_speed speed;
35
36 /* vhci root-hub port to which this device is attached */
37 __u32 rhport;
38
39 struct usbip_device ud;
40
41
42 /* lock for the below link lists */
43 spinlock_t priv_lock;
44
45 /* vhci_priv is linked to one of them. */
46 struct list_head priv_tx;
47 struct list_head priv_rx;
48
49 /* vhci_unlink is linked to one of them */
50 struct list_head unlink_tx;
51 struct list_head unlink_rx;
52
53 /* vhci_tx thread sleeps for this queue */
54 wait_queue_head_t waitq_tx;
55 };
56
57
58 /* urb->hcpriv, use container_of() */
59 struct vhci_priv {
60 unsigned long seqnum;
61 struct list_head list;
62
63 struct vhci_device *vdev;
64 struct urb *urb;
65 };
66
67
68 struct vhci_unlink {
69 /* seqnum of this request */
70 unsigned long seqnum;
71
72 struct list_head list;
73
74 /* seqnum of the unlink target */
75 unsigned long unlink_seqnum;
76 };
77
78 /*
79 * The number of ports is less than 16 ?
80 * USB_MAXCHILDREN is statically defined to 16 in usb.h. Its maximum value
81 * would be 31 because the event_bits[1] of struct usb_hub is defined as
82 * unsigned long in hub.h
83 */
84 #define VHCI_NPORTS 8
85
86 /* for usb_bus.hcpriv */
87 struct vhci_hcd {
88 spinlock_t lock;
89
90 u32 port_status[VHCI_NPORTS];
91
92 unsigned resuming:1;
93 unsigned long re_timeout;
94
95 atomic_t seqnum;
96
97 /*
98 * NOTE:
99 * wIndex shows the port number and begins from 1.
100 * But, the index of this array begins from 0.
101 */
102 struct vhci_device vdev[VHCI_NPORTS];
103
104 /* vhci_device which has not been assiged its address yet */
105 int pending_port;
106 };
107
108
109 extern struct vhci_hcd *the_controller;
110 extern struct attribute_group dev_attr_group;
111
112
113 /*-------------------------------------------------------------------------*/
114 /* prototype declaration */
115
116 /* vhci_hcd.c */
117 void rh_port_connect(int rhport, enum usb_device_speed speed);
118 void rh_port_disconnect(int rhport);
119 void vhci_rx_loop(struct usbip_task *ut);
120 void vhci_tx_loop(struct usbip_task *ut);
121
122 #define hardware (&the_controller->pdev.dev)
123
124 static inline struct vhci_device *port_to_vdev(__u32 port)
125 {
126 return &the_controller->vdev[port];
127 }
128
129 static inline struct vhci_hcd *hcd_to_vhci(struct usb_hcd *hcd)
130 {
131 return (struct vhci_hcd *) (hcd->hcd_priv);
132 }
133
134 static inline struct usb_hcd *vhci_to_hcd(struct vhci_hcd *vhci)
135 {
136 return container_of((void *) vhci, struct usb_hcd, hcd_priv);
137 }
138
139 static inline struct device *vhci_dev(struct vhci_hcd *vhci)
140 {
141 return vhci_to_hcd(vhci)->self.controller;
142 }
143
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