2 * Thunderbolt Cactus Ridge driver - Port/Switch config area registers
4 * Every thunderbolt device consists (logically) of a switch with multiple
5 * ports. Every port contains up to four config regions (HOPS, PORT, SWITCH,
6 * COUNTERS) which are used to configure the device.
8 * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
14 #include <linux/types.h>
17 #define TB_ROUTE_SHIFT 8 /* number of bits in a port entry of a route */
21 * TODO: should be 63? But we do not know how to receive frames larger than 256
22 * bytes at the frame level. (header + checksum = 16, 60*4 = 240)
24 #define TB_MAX_CONFIG_RW_LENGTH 60
28 TB_CAP_TIME1 = 0x0003,
31 TB_CAP_PLUG_EVENTS = 0x0105, /* also EEPROM */
32 TB_CAP_TIME2 = 0x0305,
34 TB_CAP_LINK_CONTROLLER = 0x0605, /* also IECS */
38 TB_PORT_DISABLED = 0, /* tb_cap_phy.disable == 1 */
39 TB_PORT_CONNECTING = 1, /* retry */
41 TB_PORT_UNPLUGGED = 7,
44 /* capability headers */
48 /* enum tb_cap cap:8; prevent "narrower than values of its type" */
49 u8 cap; /* if cap == 0x05 then we have a extended capability */
52 struct tb_cap_extended_short {
53 u8 next; /* if next and length are zero then we have a long cap */
58 struct tb_cap_extended_long {
68 struct tb_cap_link_controller {
69 struct tb_cap_extended_long cap_header;
70 u32 count:4; /* number of link controllers */
73 * offset (into this capability) of the configuration
74 * area of the first link controller
76 u32 length:12; /* link controller configuration area length */
77 u32 unknown2:4; /* TODO check that length is correct */
81 struct tb_cap_basic cap_header;
86 enum tb_port_state state:4;
90 struct tb_eeprom_ctl {
91 bool clock:1; /* send pulse to transfer one bit */
92 bool access_low:1; /* set to 0 before access */
93 bool data_out:1; /* to eeprom */
94 bool data_in:1; /* from eeprom */
95 bool access_high:1; /* set to 1 before access */
96 bool not_present:1; /* should be 0 */
98 bool present:1; /* should be 1 */
102 struct tb_cap_plug_events {
103 struct tb_cap_extended_short cap_header;
109 struct tb_eeprom_ctl eeprom_ctl;
111 u32 drom_offset; /* 32 bit register, but eeprom addresses are 16 bit */
116 /* Present on port 0 in TB_CFG_SWITCH at address zero. */
117 struct tb_regs_switch_header {
122 u32 first_cap_offset:8;
123 u32 upstream_port_number:6;
124 u32 max_port_number:6;
134 u32 plug_events_delay:8; /*
135 * RW, pause between plug events in
136 * milliseconds. Writing 0x00 is interpreted
140 u32 thunderbolt_version:8;
144 TB_TYPE_INACTIVE = 0x000000,
145 TB_TYPE_PORT = 0x000001,
146 TB_TYPE_NHI = 0x000002,
147 /* TB_TYPE_ETHERNET = 0x020000, lower order bits are not known */
148 /* TB_TYPE_SATA = 0x080000, lower order bits are not known */
149 TB_TYPE_DP_HDMI_IN = 0x0e0101,
150 TB_TYPE_DP_HDMI_OUT = 0x0e0102,
151 TB_TYPE_PCIE_DOWN = 0x100101,
152 TB_TYPE_PCIE_UP = 0x100102,
153 /* TB_TYPE_USB = 0x200000, lower order bits are not known */
156 /* Present on every port in TB_CF_PORT at address zero. */
157 struct tb_regs_port_header {
162 u32 first_cap_offset:8;
167 enum tb_port_type type:24;
168 u32 thunderbolt_version:8;
176 u32 max_in_hop_id:11;
177 u32 max_out_hop_id:11;
186 /* Hop register from TB_CFG_HOPS. 8 byte per entry. */
190 * hop to take after sending the packet through
191 * out_port (on the incoming port of the next switch)
193 u32 out_port:6; /* next port of the path (on the same switch) */
194 u32 initial_credits:8;
195 u32 unknown1:6; /* set to zero */
200 u32 unknown2:4; /* set to zero */
202 bool drop_packages:1;
203 u32 counter:11; /* index into TB_CFG_COUNTERS on this port */
204 bool counter_enable:1;
207 bool ingress_shared_buffer:1;
208 bool egress_shared_buffer:1;
209 u32 unknown3:4; /* set to zero */