Merge tag 'sunxi-drivers-for-3.18' of git://git.kernel.org/pub/scm/linux/kernel/git...
[firefly-linux-kernel-4.4.55.git] / drivers / thunderbolt / ctl.h
1 /*
2  * Thunderbolt Cactus Ridge driver - control channel and configuration commands
3  *
4  * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
5  */
6
7 #ifndef _TB_CFG
8 #define _TB_CFG
9
10 #include "nhi.h"
11
12 /* control channel */
13 struct tb_ctl;
14
15 typedef void (*hotplug_cb)(void *data, u64 route, u8 port, bool unplug);
16
17 struct tb_ctl *tb_ctl_alloc(struct tb_nhi *nhi, hotplug_cb cb, void *cb_data);
18 void tb_ctl_start(struct tb_ctl *ctl);
19 void tb_ctl_stop(struct tb_ctl *ctl);
20 void tb_ctl_free(struct tb_ctl *ctl);
21
22 /* configuration commands */
23
24 #define TB_CFG_DEFAULT_TIMEOUT 5000 /* msec */
25
26 enum tb_cfg_space {
27         TB_CFG_HOPS = 0,
28         TB_CFG_PORT = 1,
29         TB_CFG_SWITCH = 2,
30         TB_CFG_COUNTERS = 3,
31 };
32
33 enum tb_cfg_error {
34         TB_CFG_ERROR_PORT_NOT_CONNECTED = 0,
35         TB_CFG_ERROR_INVALID_CONFIG_SPACE = 2,
36         TB_CFG_ERROR_NO_SUCH_PORT = 4,
37         TB_CFG_ERROR_ACK_PLUG_EVENT = 7, /* send as reply to TB_CFG_PKG_EVENT */
38         TB_CFG_ERROR_LOOP = 8,
39 };
40
41 struct tb_cfg_result {
42         u64 response_route;
43         u32 response_port; /*
44                             * If err = 1 then this is the port that send the
45                             * error.
46                             * If err = 0 and if this was a cfg_read/write then
47                             * this is the the upstream port of the responding
48                             * switch.
49                             * Otherwise the field is set to zero.
50                             */
51         int err; /* negative errors, 0 for success, 1 for tb errors */
52         enum tb_cfg_error tb_error; /* valid if err == 1 */
53 };
54
55
56 int tb_cfg_error(struct tb_ctl *ctl, u64 route, u32 port,
57                  enum tb_cfg_error error);
58 struct tb_cfg_result tb_cfg_reset(struct tb_ctl *ctl, u64 route,
59                                   int timeout_msec);
60 struct tb_cfg_result tb_cfg_read_raw(struct tb_ctl *ctl, void *buffer,
61                                      u64 route, u32 port,
62                                      enum tb_cfg_space space, u32 offset,
63                                      u32 length, int timeout_msec);
64 struct tb_cfg_result tb_cfg_write_raw(struct tb_ctl *ctl, void *buffer,
65                                       u64 route, u32 port,
66                                       enum tb_cfg_space space, u32 offset,
67                                       u32 length, int timeout_msec);
68 int tb_cfg_read(struct tb_ctl *ctl, void *buffer, u64 route, u32 port,
69                 enum tb_cfg_space space, u32 offset, u32 length);
70 int tb_cfg_write(struct tb_ctl *ctl, void *buffer, u64 route, u32 port,
71                  enum tb_cfg_space space, u32 offset, u32 length);
72 int tb_cfg_get_upstream_port(struct tb_ctl *ctl, u64 route);
73
74
75 #endif