290 lines
7.1 KiB
C
290 lines
7.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Thunderbolt driver - Port/Switch config area registers
|
|
*
|
|
* Every thunderbolt device consists (logically) of a switch with multiple
|
|
* ports. Every port contains up to four config regions (HOPS, PORT, SWITCH,
|
|
* COUNTERS) which are used to configure the device.
|
|
*
|
|
* Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
|
|
* Copyright (C) 2018, Intel Corporation
|
|
*/
|
|
|
|
#ifndef _TB_REGS
|
|
#define _TB_REGS
|
|
|
|
#include <linux/types.h>
|
|
|
|
|
|
#define TB_ROUTE_SHIFT 8 /* number of bits in a port entry of a route */
|
|
|
|
|
|
/*
|
|
* TODO: should be 63? But we do not know how to receive frames larger than 256
|
|
* bytes at the frame level. (header + checksum = 16, 60*4 = 240)
|
|
*/
|
|
#define TB_MAX_CONFIG_RW_LENGTH 60
|
|
|
|
enum tb_switch_cap {
|
|
TB_SWITCH_CAP_VSE = 0x05,
|
|
};
|
|
|
|
enum tb_switch_vse_cap {
|
|
TB_VSE_CAP_PLUG_EVENTS = 0x01, /* also EEPROM */
|
|
TB_VSE_CAP_TIME2 = 0x03,
|
|
TB_VSE_CAP_IECS = 0x04,
|
|
TB_VSE_CAP_LINK_CONTROLLER = 0x06, /* also IECS */
|
|
};
|
|
|
|
enum tb_port_cap {
|
|
TB_PORT_CAP_PHY = 0x01,
|
|
TB_PORT_CAP_TIME1 = 0x03,
|
|
TB_PORT_CAP_ADAP = 0x04,
|
|
TB_PORT_CAP_VSE = 0x05,
|
|
};
|
|
|
|
enum tb_port_state {
|
|
TB_PORT_DISABLED = 0, /* tb_cap_phy.disable == 1 */
|
|
TB_PORT_CONNECTING = 1, /* retry */
|
|
TB_PORT_UP = 2,
|
|
TB_PORT_UNPLUGGED = 7,
|
|
};
|
|
|
|
/* capability headers */
|
|
|
|
struct tb_cap_basic {
|
|
u8 next;
|
|
/* enum tb_cap cap:8; prevent "narrower than values of its type" */
|
|
u8 cap; /* if cap == 0x05 then we have a extended capability */
|
|
} __packed;
|
|
|
|
/**
|
|
* struct tb_cap_extended_short - Switch extended short capability
|
|
* @next: Pointer to the next capability. If @next and @length are zero
|
|
* then we have a long cap.
|
|
* @cap: Base capability ID (see &enum tb_switch_cap)
|
|
* @vsec_id: Vendor specific capability ID (see &enum switch_vse_cap)
|
|
* @length: Length of this capability
|
|
*/
|
|
struct tb_cap_extended_short {
|
|
u8 next;
|
|
u8 cap;
|
|
u8 vsec_id;
|
|
u8 length;
|
|
} __packed;
|
|
|
|
/**
|
|
* struct tb_cap_extended_long - Switch extended long capability
|
|
* @zero1: This field should be zero
|
|
* @cap: Base capability ID (see &enum tb_switch_cap)
|
|
* @vsec_id: Vendor specific capability ID (see &enum switch_vse_cap)
|
|
* @zero2: This field should be zero
|
|
* @next: Pointer to the next capability
|
|
* @length: Length of this capability
|
|
*/
|
|
struct tb_cap_extended_long {
|
|
u8 zero1;
|
|
u8 cap;
|
|
u8 vsec_id;
|
|
u8 zero2;
|
|
u16 next;
|
|
u16 length;
|
|
} __packed;
|
|
|
|
/* capabilities */
|
|
|
|
struct tb_cap_link_controller {
|
|
struct tb_cap_extended_long cap_header;
|
|
u32 count:4; /* number of link controllers */
|
|
u32 unknown1:4;
|
|
u32 base_offset:8; /*
|
|
* offset (into this capability) of the configuration
|
|
* area of the first link controller
|
|
*/
|
|
u32 length:12; /* link controller configuration area length */
|
|
u32 unknown2:4; /* TODO check that length is correct */
|
|
} __packed;
|
|
|
|
struct tb_cap_phy {
|
|
struct tb_cap_basic cap_header;
|
|
u32 unknown1:16;
|
|
u32 unknown2:14;
|
|
bool disable:1;
|
|
u32 unknown3:11;
|
|
enum tb_port_state state:4;
|
|
u32 unknown4:2;
|
|
} __packed;
|
|
|
|
struct tb_eeprom_ctl {
|
|
bool clock:1; /* send pulse to transfer one bit */
|
|
bool access_low:1; /* set to 0 before access */
|
|
bool data_out:1; /* to eeprom */
|
|
bool data_in:1; /* from eeprom */
|
|
bool access_high:1; /* set to 1 before access */
|
|
bool not_present:1; /* should be 0 */
|
|
bool unknown1:1;
|
|
bool present:1; /* should be 1 */
|
|
u32 unknown2:24;
|
|
} __packed;
|
|
|
|
struct tb_cap_plug_events {
|
|
struct tb_cap_extended_short cap_header;
|
|
u32 __unknown1:2;
|
|
u32 plug_events:5;
|
|
u32 __unknown2:25;
|
|
u32 __unknown3;
|
|
u32 __unknown4;
|
|
struct tb_eeprom_ctl eeprom_ctl;
|
|
u32 __unknown5[7];
|
|
u32 drom_offset; /* 32 bit register, but eeprom addresses are 16 bit */
|
|
} __packed;
|
|
|
|
/* device headers */
|
|
|
|
/* Present on port 0 in TB_CFG_SWITCH at address zero. */
|
|
struct tb_regs_switch_header {
|
|
/* DWORD 0 */
|
|
u16 vendor_id;
|
|
u16 device_id;
|
|
/* DWORD 1 */
|
|
u32 first_cap_offset:8;
|
|
u32 upstream_port_number:6;
|
|
u32 max_port_number:6;
|
|
u32 depth:3;
|
|
u32 __unknown1:1;
|
|
u32 revision:8;
|
|
/* DWORD 2 */
|
|
u32 route_lo;
|
|
/* DWORD 3 */
|
|
u32 route_hi:31;
|
|
bool enabled:1;
|
|
/* DWORD 4 */
|
|
u32 plug_events_delay:8; /*
|
|
* RW, pause between plug events in
|
|
* milliseconds. Writing 0x00 is interpreted
|
|
* as 255ms.
|
|
*/
|
|
u32 __unknown4:16;
|
|
u32 thunderbolt_version:8;
|
|
} __packed;
|
|
|
|
enum tb_port_type {
|
|
TB_TYPE_INACTIVE = 0x000000,
|
|
TB_TYPE_PORT = 0x000001,
|
|
TB_TYPE_NHI = 0x000002,
|
|
/* TB_TYPE_ETHERNET = 0x020000, lower order bits are not known */
|
|
/* TB_TYPE_SATA = 0x080000, lower order bits are not known */
|
|
TB_TYPE_DP_HDMI_IN = 0x0e0101,
|
|
TB_TYPE_DP_HDMI_OUT = 0x0e0102,
|
|
TB_TYPE_PCIE_DOWN = 0x100101,
|
|
TB_TYPE_PCIE_UP = 0x100102,
|
|
/* TB_TYPE_USB = 0x200000, lower order bits are not known */
|
|
};
|
|
|
|
/* Present on every port in TB_CF_PORT at address zero. */
|
|
struct tb_regs_port_header {
|
|
/* DWORD 0 */
|
|
u16 vendor_id;
|
|
u16 device_id;
|
|
/* DWORD 1 */
|
|
u32 first_cap_offset:8;
|
|
u32 max_counters:11;
|
|
u32 __unknown1:5;
|
|
u32 revision:8;
|
|
/* DWORD 2 */
|
|
enum tb_port_type type:24;
|
|
u32 thunderbolt_version:8;
|
|
/* DWORD 3 */
|
|
u32 __unknown2:20;
|
|
u32 port_number:6;
|
|
u32 __unknown3:6;
|
|
/* DWORD 4 */
|
|
u32 nfc_credits;
|
|
/* DWORD 5 */
|
|
u32 max_in_hop_id:11;
|
|
u32 max_out_hop_id:11;
|
|
u32 __unknown4:10;
|
|
/* DWORD 6 */
|
|
u32 __unknown5;
|
|
/* DWORD 7 */
|
|
u32 __unknown6;
|
|
|
|
} __packed;
|
|
|
|
/* DWORD 4 */
|
|
#define TB_PORT_NFC_CREDITS_MASK GENMASK(19, 0)
|
|
#define TB_PORT_MAX_CREDITS_SHIFT 20
|
|
#define TB_PORT_MAX_CREDITS_MASK GENMASK(26, 20)
|
|
/* DWORD 5 */
|
|
#define TB_PORT_LCA_SHIFT 22
|
|
#define TB_PORT_LCA_MASK GENMASK(28, 22)
|
|
|
|
/* Display Port adapter registers */
|
|
|
|
/* DWORD 0 */
|
|
#define TB_DP_VIDEO_HOPID_SHIFT 16
|
|
#define TB_DP_VIDEO_HOPID_MASK GENMASK(26, 16)
|
|
#define TB_DP_AUX_EN BIT(30)
|
|
#define TB_DP_VIDEO_EN BIT(31)
|
|
/* DWORD 1 */
|
|
#define TB_DP_AUX_TX_HOPID_MASK GENMASK(10, 0)
|
|
#define TB_DP_AUX_RX_HOPID_SHIFT 11
|
|
#define TB_DP_AUX_RX_HOPID_MASK GENMASK(21, 11)
|
|
/* DWORD 2 */
|
|
#define TB_DP_HDP BIT(6)
|
|
/* DWORD 3 */
|
|
#define TB_DP_HPDC BIT(9)
|
|
/* DWORD 4 */
|
|
#define TB_DP_LOCAL_CAP 0x4
|
|
/* DWORD 5 */
|
|
#define TB_DP_REMOTE_CAP 0x5
|
|
|
|
/* PCIe adapter registers */
|
|
|
|
#define TB_PCI_EN BIT(31)
|
|
|
|
/* Hop register from TB_CFG_HOPS. 8 byte per entry. */
|
|
struct tb_regs_hop {
|
|
/* DWORD 0 */
|
|
u32 next_hop:11; /*
|
|
* hop to take after sending the packet through
|
|
* out_port (on the incoming port of the next switch)
|
|
*/
|
|
u32 out_port:6; /* next port of the path (on the same switch) */
|
|
u32 initial_credits:8;
|
|
u32 unknown1:6; /* set to zero */
|
|
bool enable:1;
|
|
|
|
/* DWORD 1 */
|
|
u32 weight:4;
|
|
u32 unknown2:4; /* set to zero */
|
|
u32 priority:3;
|
|
bool drop_packages:1;
|
|
u32 counter:11; /* index into TB_CFG_COUNTERS on this port */
|
|
bool counter_enable:1;
|
|
bool ingress_fc:1;
|
|
bool egress_fc:1;
|
|
bool ingress_shared_buffer:1;
|
|
bool egress_shared_buffer:1;
|
|
bool pending:1;
|
|
u32 unknown3:3; /* set to zero */
|
|
} __packed;
|
|
|
|
/* Common link controller registers */
|
|
#define TB_LC_DESC 0x02
|
|
#define TB_LC_DESC_NLC_MASK GENMASK(3, 0)
|
|
#define TB_LC_DESC_SIZE_SHIFT 8
|
|
#define TB_LC_DESC_SIZE_MASK GENMASK(15, 8)
|
|
#define TB_LC_DESC_PORT_SIZE_SHIFT 16
|
|
#define TB_LC_DESC_PORT_SIZE_MASK GENMASK(27, 16)
|
|
#define TB_LC_FUSE 0x03
|
|
|
|
/* Link controller registers */
|
|
#define TB_LC_SX_CTRL 0x96
|
|
#define TB_LC_SX_CTRL_L1C BIT(16)
|
|
#define TB_LC_SX_CTRL_L2C BIT(20)
|
|
#define TB_LC_SX_CTRL_UPSTREAM BIT(30)
|
|
#define TB_LC_SX_CTRL_SLP BIT(31)
|
|
|
|
#endif
|