263 lines
6.8 KiB
Diff
263 lines
6.8 KiB
Diff
From: Andreas Noever <andreas.noever@gmail.com>
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Date: Tue, 3 Jun 2014 22:04:01 +0200
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Subject: [04/31] thunderbolt: Add tb_regs.h
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Origin: https://git.kernel.org/linus/7adf60972c692b0b3d0958cd7322e22a67187111
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Every thunderbolt device consists (logically) of a switch with multiple
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ports. Every port contains up to four config regions (HOPS, PORT,
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SWITCH, COUNTERS) which are used to configure the device.
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The tb_regs.h file contains all known registers and capabilities from
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these config regions.
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Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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drivers/thunderbolt/tb.c | 5 +
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drivers/thunderbolt/tb_regs.h | 213 ++++++++++++++++++++++++++++++++++++++++++
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2 files changed, 218 insertions(+)
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create mode 100644 drivers/thunderbolt/tb_regs.h
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diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
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index 6920979..164dea0 100644
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--- a/drivers/thunderbolt/tb.c
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+++ b/drivers/thunderbolt/tb.c
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@@ -9,6 +9,7 @@
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#include <linux/delay.h>
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#include "tb.h"
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+#include "tb_regs.h"
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/* hotplug handling */
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@@ -100,6 +101,10 @@ struct tb *thunderbolt_alloc_and_start(struct tb_nhi *nhi)
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{
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struct tb *tb;
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+ BUILD_BUG_ON(sizeof(struct tb_regs_switch_header) != 5 * 4);
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+ BUILD_BUG_ON(sizeof(struct tb_regs_port_header) != 8 * 4);
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+ BUILD_BUG_ON(sizeof(struct tb_regs_hop) != 2 * 4);
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+
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tb = kzalloc(sizeof(*tb), GFP_KERNEL);
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if (!tb)
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return NULL;
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diff --git a/drivers/thunderbolt/tb_regs.h b/drivers/thunderbolt/tb_regs.h
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new file mode 100644
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index 0000000..6577af7
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--- /dev/null
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+++ b/drivers/thunderbolt/tb_regs.h
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@@ -0,0 +1,213 @@
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+/*
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+ * Thunderbolt Cactus Ridge driver - Port/Switch config area registers
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+ *
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+ * Every thunderbolt device consists (logically) of a switch with multiple
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+ * ports. Every port contains up to four config regions (HOPS, PORT, SWITCH,
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+ * COUNTERS) which are used to configure the device.
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+ *
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+ * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
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+ */
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+
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+#ifndef _TB_REGS
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+#define _TB_REGS
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+
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+#include <linux/types.h>
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+
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+
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+#define TB_ROUTE_SHIFT 8 /* number of bits in a port entry of a route */
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+
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+
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+/*
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+ * TODO: should be 63? But we do not know how to receive frames larger than 256
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+ * bytes at the frame level. (header + checksum = 16, 60*4 = 240)
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+ */
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+#define TB_MAX_CONFIG_RW_LENGTH 60
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+
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+enum tb_cap {
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+ TB_CAP_PHY = 0x0001,
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+ TB_CAP_TIME1 = 0x0003,
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+ TB_CAP_PCIE = 0x0004,
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+ TB_CAP_I2C = 0x0005,
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+ TB_CAP_PLUG_EVENTS = 0x0105, /* also EEPROM */
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+ TB_CAP_TIME2 = 0x0305,
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+ TB_CAL_IECS = 0x0405,
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+ TB_CAP_LINK_CONTROLLER = 0x0605, /* also IECS */
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+};
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+
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+enum tb_port_state {
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+ TB_PORT_DISABLED = 0, /* tb_cap_phy.disable == 1 */
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+ TB_PORT_CONNECTING = 1, /* retry */
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+ TB_PORT_UP = 2,
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+ TB_PORT_UNPLUGGED = 7,
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+};
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+
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+/* capability headers */
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+
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+struct tb_cap_basic {
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+ u8 next;
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+ /* enum tb_cap cap:8; prevent "narrower than values of its type" */
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+ u8 cap; /* if cap == 0x05 then we have a extended capability */
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+} __packed;
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+
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+struct tb_cap_extended_short {
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+ u8 next; /* if next and length are zero then we have a long cap */
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+ enum tb_cap cap:16;
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+ u8 length;
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+} __packed;
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+
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+struct tb_cap_extended_long {
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+ u8 zero1;
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+ enum tb_cap cap:16;
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+ u8 zero2;
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+ u16 next;
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+ u16 length;
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+} __packed;
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+
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+/* capabilities */
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+
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+struct tb_cap_link_controller {
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+ struct tb_cap_extended_long cap_header;
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+ u32 count:4; /* number of link controllers */
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+ u32 unknown1:4;
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+ u32 base_offset:8; /*
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+ * offset (into this capability) of the configuration
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+ * area of the first link controller
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+ */
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+ u32 length:12; /* link controller configuration area length */
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+ u32 unknown2:4; /* TODO check that length is correct */
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+} __packed;
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+
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+struct tb_cap_phy {
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+ struct tb_cap_basic cap_header;
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+ u32 unknown1:16;
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+ u32 unknown2:14;
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+ bool disable:1;
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+ u32 unknown3:11;
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+ enum tb_port_state state:4;
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+ u32 unknown4:2;
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+} __packed;
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+
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+struct tb_eeprom_ctl {
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+ bool clock:1; /* send pulse to transfer one bit */
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+ bool access_low:1; /* set to 0 before access */
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+ bool data_out:1; /* to eeprom */
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+ bool data_in:1; /* from eeprom */
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+ bool access_high:1; /* set to 1 before access */
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+ bool not_present:1; /* should be 0 */
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+ bool unknown1:1;
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+ bool present:1; /* should be 1 */
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+ u32 unknown2:24;
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+} __packed;
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+
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+struct tb_cap_plug_events {
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+ struct tb_cap_extended_short cap_header;
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+ u32 __unknown1:2;
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+ u32 plug_events:5;
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+ u32 __unknown2:25;
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+ u32 __unknown3;
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+ u32 __unknown4;
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+ struct tb_eeprom_ctl eeprom_ctl;
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+ u32 __unknown5[7];
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+ u32 drom_offset; /* 32 bit register, but eeprom addresses are 16 bit */
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+} __packed;
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+
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+/* device headers */
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+
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+/* Present on port 0 in TB_CFG_SWITCH at address zero. */
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+struct tb_regs_switch_header {
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+ /* DWORD 0 */
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+ u16 vendor_id;
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+ u16 device_id;
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+ /* DWORD 1 */
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+ u32 first_cap_offset:8;
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+ u32 upstream_port_number:6;
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+ u32 max_port_number:6;
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+ u32 depth:3;
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+ u32 __unknown1:1;
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+ u32 revision:8;
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+ /* DWORD 2 */
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+ u32 route_lo;
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+ /* DWORD 3 */
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+ u32 route_hi:31;
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+ bool enabled:1;
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+ /* DWORD 4 */
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+ u32 plug_events_delay:8; /*
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+ * RW, pause between plug events in
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+ * milliseconds. Writing 0x00 is interpreted
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+ * as 255ms.
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+ */
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+ u32 __unknown4:16;
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+ u32 thunderbolt_version:8;
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+} __packed;
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+
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+enum tb_port_type {
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+ TB_TYPE_INACTIVE = 0x000000,
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+ TB_TYPE_PORT = 0x000001,
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+ TB_TYPE_NHI = 0x000002,
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+ /* TB_TYPE_ETHERNET = 0x020000, lower order bits are not known */
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+ /* TB_TYPE_SATA = 0x080000, lower order bits are not known */
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+ TB_TYPE_DP_HDMI_IN = 0x0e0101,
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+ TB_TYPE_DP_HDMI_OUT = 0x0e0102,
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+ TB_TYPE_PCIE_DOWN = 0x100101,
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+ TB_TYPE_PCIE_UP = 0x100102,
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+ /* TB_TYPE_USB = 0x200000, lower order bits are not known */
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+};
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+
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+/* Present on every port in TB_CF_PORT at address zero. */
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+struct tb_regs_port_header {
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+ /* DWORD 0 */
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+ u16 vendor_id;
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+ u16 device_id;
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+ /* DWORD 1 */
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+ u32 first_cap_offset:8;
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+ u32 max_counters:11;
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+ u32 __unknown1:5;
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+ u32 revision:8;
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+ /* DWORD 2 */
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+ enum tb_port_type type:24;
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+ u32 thunderbolt_version:8;
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+ /* DWORD 3 */
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+ u32 __unknown2:20;
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+ u32 port_number:6;
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+ u32 __unknown3:6;
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+ /* DWORD 4 */
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+ u32 nfc_credits;
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+ /* DWORD 5 */
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+ u32 max_in_hop_id:11;
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+ u32 max_out_hop_id:11;
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+ u32 __unkown4:10;
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+ /* DWORD 6 */
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+ u32 __unknown5;
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+ /* DWORD 7 */
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+ u32 __unknown6;
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+
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+} __packed;
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+
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+/* Hop register from TB_CFG_HOPS. 8 byte per entry. */
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+struct tb_regs_hop {
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+ /* DWORD 0 */
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+ u32 next_hop:11; /*
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+ * hop to take after sending the packet through
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+ * out_port (on the incoming port of the next switch)
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+ */
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+ u32 out_port:6; /* next port of the path (on the same switch) */
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+ u32 initial_credits:8;
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+ u32 unknown1:6; /* set to zero */
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+ bool enable:1;
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+
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+ /* DWORD 1 */
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+ u32 weight:4;
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+ u32 unknown2:4; /* set to zero */
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+ u32 priority:3;
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+ bool drop_packages:1;
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+ u32 counter:11; /* index into TB_CFG_COUNTERS on this port */
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+ bool counter_enable:1;
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+ bool ingress_fc:1;
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+ bool egress_fc:1;
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+ bool ingress_shared_buffer:1;
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+ bool egress_shared_buffer:1;
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+ u32 unknown3:4; /* set to zero */
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+} __packed;
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+
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+
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+#endif
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