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1 /*-
2  * Copyright (c) 2019 Vladimir Kondratyev <wulf@FreeBSD.org>
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23  * SUCH DAMAGE.
24  */
25
26 #ifndef _HID_HIDBUS_H_
27 #define _HID_HIDBUS_H_
28
29 enum {
30         HIDBUS_IVAR_USAGE,
31         HIDBUS_IVAR_INDEX,
32         HIDBUS_IVAR_FLAGS,
33 #define HIDBUS_FLAG_AUTOCHILD   (0<<1)  /* Child is autodiscovered */
34 #define HIDBUS_FLAG_CAN_POLL    (1<<1)  /* Child can work during panic */
35         HIDBUS_IVAR_DRIVER_INFO,
36         HIDBUS_IVAR_LOCK,
37 };
38
39 #define HIDBUS_ACCESSOR(A, B, T)                                        \
40         __BUS_ACCESSOR(hidbus, A, HIDBUS, B, T)
41
42 HIDBUS_ACCESSOR(usage,          USAGE,          int32_t)
43 HIDBUS_ACCESSOR(index,          INDEX,          uint8_t)
44 HIDBUS_ACCESSOR(flags,          FLAGS,          uint32_t)
45 HIDBUS_ACCESSOR(driver_info,    DRIVER_INFO,    uintptr_t)
46 HIDBUS_ACCESSOR(lock,           LOCK,           struct mtx *)
47
48 /*
49  * The following structure is used when looking up an HID driver for
50  * an HID device. It is inspired by the structure called "usb_device_id".
51  * which is originated in Linux and ported to FreeBSD.
52  */
53 struct hid_device_id {
54
55         /* Select which fields to match against */
56 #if BYTE_ORDER == LITTLE_ENDIAN
57         uint16_t
58                 match_flag_page:1,
59                 match_flag_usage:1,
60                 match_flag_bus:1,
61                 match_flag_vendor:1,
62                 match_flag_product:1,
63                 match_flag_ver_lo:1,
64                 match_flag_ver_hi:1,
65                 match_flag_pnp:1,
66                 match_flag_unused:8;
67 #else
68         uint16_t
69                 match_flag_unused:8,
70                 match_flag_pnp:1,
71                 match_flag_ver_hi:1,
72                 match_flag_ver_lo:1,
73                 match_flag_product:1,
74                 match_flag_vendor:1,
75                 match_flag_bus:1,
76                 match_flag_usage:1,
77                 match_flag_page:1;
78 #endif
79
80         /* Used for top level collection usage matches */
81         uint16_t page;
82         uint16_t usage;
83
84         /* Used for product specific matches; the Version range is inclusive */
85         uint8_t idBus;
86         uint16_t idVendor;
87         uint16_t idProduct;
88         uint16_t idVersion_lo;
89         uint16_t idVersion_hi;
90         char *idPnP;
91
92         /* Hook for driver specific information */
93         uintptr_t driver_info;
94 };
95
96 #define HID_STD_PNP_INFO                                        \
97   "M16:mask;U16:page;U16:usage;U8:bus;U16:vendor;U16:product;"  \
98   "L16:version;G16:version;Z:_HID"
99 #define HID_PNP_INFO(table)                     \
100   MODULE_PNP_INFO(HID_STD_PNP_INFO, hidbus, table, table, nitems(table))
101
102 #define HID_TLC(pg,usg)                         \
103   .match_flag_page = 1, .match_flag_usage = 1, .page = (pg), .usage = (usg)
104
105 #define HID_BUS(bus)                            \
106   .match_flag_bus = 1, .idBus = (bus)
107
108 #define HID_VENDOR(vend)                        \
109   .match_flag_vendor = 1, .idVendor = (vend)
110
111 #define HID_PRODUCT(prod)                       \
112   .match_flag_product = 1, .idProduct = (prod)
113
114 #define HID_VP(vend,prod)                       \
115   HID_VENDOR(vend), HID_PRODUCT(prod)
116
117 #define HID_BVP(bus,vend,prod)                  \
118   HID_BUS(bus), HID_VENDOR(vend), HID_PRODUCT(prod)
119
120 #define HID_BVPI(bus,vend,prod,info)            \
121   HID_BUS(bus), HID_VENDOR(vend), HID_PRODUCT(prod), HID_DRIVER_INFO(info)
122
123 #define HID_VERSION_GTEQ(lo)    /* greater than or equal */     \
124   .match_flag_ver_lo = 1, .idVersion_lo = (lo)
125
126 #define HID_VERSION_LTEQ(hi)    /* less than or equal */        \
127   .match_flag_ver_hi = 1, .idVersion_hi = (hi)
128
129 #define HID_PNP(pnp)                            \
130   .match_flag_pnp = 1, .idPnP = (pnp)
131
132 #define HID_DRIVER_INFO(n)                      \
133   .driver_info = (n)
134
135 #define HID_GET_DRIVER_INFO(did)                \
136   (did)->driver_info
137
138 #define HIDBUS_LOOKUP_ID(d, h)  hidbus_lookup_id((d), (h), nitems(h))
139 #define HIDBUS_LOOKUP_DRIVER_INFO(d, h)         \
140         hidbus_lookup_driver_info((d), (h), nitems(h))
141
142 /*
143  * Walk through all HID items hi belonging Top Level Collection #tlc_index
144  */
145 #define HIDBUS_FOREACH_ITEM(hd, hi, tlc_index)                          \
146         for (uint8_t _iter = 0;                                         \
147             _iter <= (tlc_index) && hid_get_item((hd), (hi));           \
148             _iter += (hi)->kind == hid_endcollection && (hi)->collevel == 0) \
149                 if (_iter == (tlc_index))
150
151 int     hidbus_locate(const void *desc, hid_size_t size, int32_t u,
152             enum hid_kind k, uint8_t tlc_index, uint8_t index,
153             struct hid_location *loc, uint32_t *flags, uint8_t *id,
154             struct hid_absinfo *ai);
155
156 const struct hid_device_id *hidbus_lookup_id(device_t,
157                     const struct hid_device_id *, int);
158 struct hid_rdesc_info *hidbus_get_rdesc_info(device_t);
159 int             hidbus_lookup_driver_info(device_t,
160                     const struct hid_device_id *, int);
161 void            hidbus_set_intr(device_t, hid_intr_t*, void *);
162 int             hidbus_intr_start(device_t);
163 int             hidbus_intr_stop(device_t);
164 void            hidbus_intr_poll(device_t);
165 void            hidbus_set_desc(device_t, const char *);
166 device_t        hidbus_find_child(device_t, int32_t);
167
168 /* hidbus HID interface */
169 int     hid_get_report_descr(device_t, void **, hid_size_t *);
170 int     hid_set_report_descr(device_t, const void *, hid_size_t);
171
172 const struct hid_device_info *hid_get_device_info(device_t);
173
174 extern devclass_t hidbus_devclass;
175
176 #endif  /* _HID_HIDBUS_H_ */