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Date: Fri, 29 Nov 2013 02:35:41 +0100
From: Andreas Noever <andreas.noever@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Andreas Noever <andreas.noever@...il.com>
Subject: [PATCH 04/12] thunderbolt: Add tb_regs.h
Every thunderbolt device consists (logically) of a switch with multiple
ports. Every port contains multiple config regions (HOPS, PORT, SWITCH,
COUNTERS) which are used to configure the device.
The tb_regs.h file contains all known registers and capabilities from these
config regions.
Signed-off-by: Andreas Noever <andreas.noever@...il.com>
---
drivers/thunderbolt/tb_regs.h | 187 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 187 insertions(+)
create mode 100644 drivers/thunderbolt/tb_regs.h
diff --git a/drivers/thunderbolt/tb_regs.h b/drivers/thunderbolt/tb_regs.h
new file mode 100644
index 0000000..bd3ad67
--- /dev/null
+++ b/drivers/thunderbolt/tb_regs.h
@@ -0,0 +1,187 @@
+/*
+ * Thunderbolt Port/Switch config area registers
+ *
+ * Copyright (c) 2013 Andreas Noever <andreas.noever@...il.com>
+ */
+
+#ifndef _TB_REGS
+#define _TB_REGS
+
+#include <linux/types.h>
+
+/*
+ * TODO: should be 63? But we do not know how to receive frames larger than 256
+ * bytes. (header + checksum = 16, 60*4 = 240)
+ */
+#define TB_MAX_CONFIG_RW_LENGTH 60
+
+enum tb_cap {
+ TB_CAP_PHY = 0x0001,
+ TB_CAP_TIME1 = 0x0003,
+ TB_CAP_PCIE = 0x0004,
+ TB_CAP_I2C = 0x0005,
+ TB_CAP_PLUG_EVENTS = 0x0105, /* also EEPROM */
+ TB_CAP_TIME2 = 0x0305,
+ TB_CAL_IECS = 0x0405,
+ TB_CAP_LINK_CONTROLLER = 0x0605, /* also IECS */
+};
+
+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 {
+ u8 next; /* if next and length are zero then we have a long cap */
+ enum tb_cap cap:16;
+ u8 length;
+} __packed;
+
+struct tb_cap_extended_long {
+ u8 zero1;
+ enum tb_cap cap:16;
+ 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_cap_plug_events {
+ struct tb_cap_extended_short cap_header;
+ u32 __unknown1:2;
+ u32 plug_events:5;
+ u32 __unknown2:25;
+} __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 __unknown1:16;
+ 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 __unkown4:10;
+ /* DWORD 6 */
+ u32 __unknown5;
+ /* DWORD 7 */
+ u32 __unknown6;
+
+} __packed;
+
+/* 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;
+ u32 unknown3:4; /* set to zero */
+} __packed;
+
+
+#endif
--
1.8.4.2
--
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