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4a755f1da5
upper_32_bits() and lower_32_bits() have been ported into linux/compat.h. Start use them now in drivers/usb/host/xhci.h. Signed-off-by: Lijun Pan <Lijun.Pan@freescale.com>
1254 lines
42 KiB
C
1254 lines
42 KiB
C
/*
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* USB HOST XHCI Controller
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*
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* Based on xHCI host controller driver in linux-kernel
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* by Sarah Sharp.
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*
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* Copyright (C) 2008 Intel Corp.
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* Author: Sarah Sharp
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*
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* Copyright (C) 2013 Samsung Electronics Co.Ltd
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* Authors: Vivek Gautam <gautam.vivek@samsung.com>
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* Vikas Sajjan <vikas.sajjan@samsung.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef HOST_XHCI_H_
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#define HOST_XHCI_H_
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#include <asm/cache.h>
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#include <asm/io.h>
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#include <linux/list.h>
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#include <linux/compat.h>
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#define MAX_EP_CTX_NUM 31
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#define XHCI_ALIGNMENT 64
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/* Generic timeout for XHCI events */
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#define XHCI_TIMEOUT 5000
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/* Max number of USB devices for any host controller - limit in section 6.1 */
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#define MAX_HC_SLOTS 256
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/* Section 5.3.3 - MaxPorts */
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#define MAX_HC_PORTS 127
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/* Up to 16 ms to halt an HC */
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#define XHCI_MAX_HALT_USEC (16*1000)
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#define XHCI_MAX_RESET_USEC (250*1000)
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/*
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* These bits are Read Only (RO) and should be saved and written to the
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* registers: 0, 3, 10:13, 30
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* connect status, over-current status, port speed, and device removable.
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* connect status and port speed are also sticky - meaning they're in
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* the AUX well and they aren't changed by a hot, warm, or cold reset.
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*/
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#define XHCI_PORT_RO ((1 << 0) | (1 << 3) | (0xf << 10) | (1 << 30))
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/*
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* These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit:
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* bits 5:8, 9, 14:15, 25:27
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* link state, port power, port indicator state, "wake on" enable state
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*/
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#define XHCI_PORT_RWS ((0xf << 5) | (1 << 9) | (0x3 << 14) | (0x7 << 25))
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/*
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* These bits are RW; writing a 1 sets the bit, writing a 0 has no effect:
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* bit 4 (port reset)
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*/
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#define XHCI_PORT_RW1S ((1 << 4))
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/*
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* These bits are RW; writing a 1 clears the bit, writing a 0 has no effect:
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* bits 1, 17, 18, 19, 20, 21, 22, 23
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* port enable/disable, and
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* change bits: connect, PED,
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* warm port reset changed (reserved zero for USB 2.0 ports),
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* over-current, reset, link state, and L1 change
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*/
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#define XHCI_PORT_RW1CS ((1 << 1) | (0x7f << 17))
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/*
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* Bit 16 is RW, and writing a '1' to it causes the link state control to be
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* latched in
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*/
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#define XHCI_PORT_RW ((1 << 16))
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/*
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* These bits are Reserved Zero (RsvdZ) and zero should be written to them:
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* bits 2, 24, 28:31
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*/
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#define XHCI_PORT_RZ ((1 << 2) | (1 << 24) | (0xf << 28))
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/*
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* XHCI Register Space.
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*/
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struct xhci_hccr {
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uint32_t cr_capbase;
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uint32_t cr_hcsparams1;
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uint32_t cr_hcsparams2;
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uint32_t cr_hcsparams3;
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uint32_t cr_hccparams;
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uint32_t cr_dboff;
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uint32_t cr_rtsoff;
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/* hc_capbase bitmasks */
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/* bits 7:0 - how long is the Capabilities register */
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#define HC_LENGTH(p) XHCI_HC_LENGTH(p)
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/* bits 31:16 */
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#define HC_VERSION(p) (((p) >> 16) & 0xffff)
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/* HCSPARAMS1 - hcs_params1 - bitmasks */
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/* bits 0:7, Max Device Slots */
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#define HCS_MAX_SLOTS(p) (((p) >> 0) & 0xff)
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#define HCS_SLOTS_MASK 0xff
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/* bits 8:18, Max Interrupters */
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#define HCS_MAX_INTRS(p) (((p) >> 8) & 0x7ff)
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/* bits 24:31, Max Ports - max value is 0x7F = 127 ports */
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#define HCS_MAX_PORTS_SHIFT 24
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#define HCS_MAX_PORTS_MASK (0x7f << HCS_MAX_PORTS_SHIFT)
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#define HCS_MAX_PORTS(p) (((p) >> 24) & 0x7f)
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/* HCSPARAMS2 - hcs_params2 - bitmasks */
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/* bits 0:3, frames or uframes that SW needs to queue transactions
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* ahead of the HW to meet periodic deadlines */
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#define HCS_IST(p) (((p) >> 0) & 0xf)
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/* bits 4:7, max number of Event Ring segments */
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#define HCS_ERST_MAX(p) (((p) >> 4) & 0xf)
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/* bit 26 Scratchpad restore - for save/restore HW state - not used yet */
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/* bits 27:31 number of Scratchpad buffers SW must allocate for the HW */
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#define HCS_MAX_SCRATCHPAD(p) (((p) >> 27) & 0x1f)
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/* HCSPARAMS3 - hcs_params3 - bitmasks */
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/* bits 0:7, Max U1 to U0 latency for the roothub ports */
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#define HCS_U1_LATENCY(p) (((p) >> 0) & 0xff)
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/* bits 16:31, Max U2 to U0 latency for the roothub ports */
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#define HCS_U2_LATENCY(p) (((p) >> 16) & 0xffff)
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/* HCCPARAMS - hcc_params - bitmasks */
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/* true: HC can use 64-bit address pointers */
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#define HCC_64BIT_ADDR(p) ((p) & (1 << 0))
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/* true: HC can do bandwidth negotiation */
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#define HCC_BANDWIDTH_NEG(p) ((p) & (1 << 1))
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/* true: HC uses 64-byte Device Context structures
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* FIXME 64-byte context structures aren't supported yet.
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*/
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#define HCC_64BYTE_CONTEXT(p) ((p) & (1 << 2))
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/* true: HC has port power switches */
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#define HCC_PPC(p) ((p) & (1 << 3))
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/* true: HC has port indicators */
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#define HCS_INDICATOR(p) ((p) & (1 << 4))
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/* true: HC has Light HC Reset Capability */
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#define HCC_LIGHT_RESET(p) ((p) & (1 << 5))
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/* true: HC supports latency tolerance messaging */
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#define HCC_LTC(p) ((p) & (1 << 6))
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/* true: no secondary Stream ID Support */
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#define HCC_NSS(p) ((p) & (1 << 7))
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/* Max size for Primary Stream Arrays - 2^(n+1), where n is bits 12:15 */
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#define HCC_MAX_PSA(p) (1 << ((((p) >> 12) & 0xf) + 1))
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/* Extended Capabilities pointer from PCI base - section 5.3.6 */
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#define HCC_EXT_CAPS(p) XHCI_HCC_EXT_CAPS(p)
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/* db_off bitmask - bits 0:1 reserved */
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#define DBOFF_MASK (~0x3)
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/* run_regs_off bitmask - bits 0:4 reserved */
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#define RTSOFF_MASK (~0x1f)
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};
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struct xhci_hcor_port_regs {
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volatile uint32_t or_portsc;
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volatile uint32_t or_portpmsc;
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volatile uint32_t or_portli;
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volatile uint32_t reserved_3;
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};
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struct xhci_hcor {
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volatile uint32_t or_usbcmd;
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volatile uint32_t or_usbsts;
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volatile uint32_t or_pagesize;
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volatile uint32_t reserved_0[2];
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volatile uint32_t or_dnctrl;
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volatile uint64_t or_crcr;
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volatile uint32_t reserved_1[4];
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volatile uint64_t or_dcbaap;
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volatile uint32_t or_config;
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volatile uint32_t reserved_2[241];
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struct xhci_hcor_port_regs portregs[CONFIG_SYS_USB_XHCI_MAX_ROOT_PORTS];
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uint32_t reserved_4[CONFIG_SYS_USB_XHCI_MAX_ROOT_PORTS * 254];
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};
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/* USBCMD - USB command - command bitmasks */
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/* start/stop HC execution - do not write unless HC is halted*/
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#define CMD_RUN XHCI_CMD_RUN
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/* Reset HC - resets internal HC state machine and all registers (except
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* PCI config regs). HC does NOT drive a USB reset on the downstream ports.
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* The xHCI driver must reinitialize the xHC after setting this bit.
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*/
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#define CMD_RESET (1 << 1)
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/* Event Interrupt Enable - a '1' allows interrupts from the host controller */
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#define CMD_EIE XHCI_CMD_EIE
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/* Host System Error Interrupt Enable - get out-of-band signal for HC errors */
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#define CMD_HSEIE XHCI_CMD_HSEIE
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/* bits 4:6 are reserved (and should be preserved on writes). */
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/* light reset (port status stays unchanged) - reset completed when this is 0 */
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#define CMD_LRESET (1 << 7)
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/* host controller save/restore state. */
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#define CMD_CSS (1 << 8)
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#define CMD_CRS (1 << 9)
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/* Enable Wrap Event - '1' means xHC generates an event when MFINDEX wraps. */
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#define CMD_EWE XHCI_CMD_EWE
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/* MFINDEX power management - '1' means xHC can stop MFINDEX counter if all root
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* hubs are in U3 (selective suspend), disconnect, disabled, or powered-off.
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* '0' means the xHC can power it off if all ports are in the disconnect,
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* disabled, or powered-off state.
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*/
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#define CMD_PM_INDEX (1 << 11)
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/* bits 12:31 are reserved (and should be preserved on writes). */
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/* USBSTS - USB status - status bitmasks */
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/* HC not running - set to 1 when run/stop bit is cleared. */
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#define STS_HALT XHCI_STS_HALT
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/* serious error, e.g. PCI parity error. The HC will clear the run/stop bit. */
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#define STS_FATAL (1 << 2)
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/* event interrupt - clear this prior to clearing any IP flags in IR set*/
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#define STS_EINT (1 << 3)
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/* port change detect */
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#define STS_PORT (1 << 4)
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/* bits 5:7 reserved and zeroed */
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/* save state status - '1' means xHC is saving state */
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#define STS_SAVE (1 << 8)
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/* restore state status - '1' means xHC is restoring state */
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#define STS_RESTORE (1 << 9)
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/* true: save or restore error */
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#define STS_SRE (1 << 10)
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/* true: Controller Not Ready to accept doorbell or op reg writes after reset */
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#define STS_CNR XHCI_STS_CNR
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/* true: internal Host Controller Error - SW needs to reset and reinitialize */
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#define STS_HCE (1 << 12)
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/* bits 13:31 reserved and should be preserved */
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/*
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* DNCTRL - Device Notification Control Register - dev_notification bitmasks
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* Generate a device notification event when the HC sees a transaction with a
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* notification type that matches a bit set in this bit field.
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*/
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#define DEV_NOTE_MASK (0xffff)
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#define ENABLE_DEV_NOTE(x) (1 << (x))
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/* Most of the device notification types should only be used for debug.
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* SW does need to pay attention to function wake notifications.
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*/
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#define DEV_NOTE_FWAKE ENABLE_DEV_NOTE(1)
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/* CRCR - Command Ring Control Register - cmd_ring bitmasks */
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/* bit 0 is the command ring cycle state */
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/* stop ring operation after completion of the currently executing command */
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#define CMD_RING_PAUSE (1 << 1)
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/* stop ring immediately - abort the currently executing command */
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#define CMD_RING_ABORT (1 << 2)
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/* true: command ring is running */
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#define CMD_RING_RUNNING (1 << 3)
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/* bits 4:5 reserved and should be preserved */
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/* Command Ring pointer - bit mask for the lower 32 bits. */
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#define CMD_RING_RSVD_BITS (0x3f)
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/* CONFIG - Configure Register - config_reg bitmasks */
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/* bits 0:7 - maximum number of device slots enabled (NumSlotsEn) */
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#define MAX_DEVS(p) ((p) & 0xff)
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/* bits 8:31 - reserved and should be preserved */
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/* PORTSC - Port Status and Control Register - port_status_base bitmasks */
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/* true: device connected */
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#define PORT_CONNECT (1 << 0)
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/* true: port enabled */
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#define PORT_PE (1 << 1)
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/* bit 2 reserved and zeroed */
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/* true: port has an over-current condition */
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#define PORT_OC (1 << 3)
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/* true: port reset signaling asserted */
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#define PORT_RESET (1 << 4)
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/* Port Link State - bits 5:8
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* A read gives the current link PM state of the port,
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* a write with Link State Write Strobe set sets the link state.
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*/
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#define PORT_PLS_MASK (0xf << 5)
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#define XDEV_U0 (0x0 << 5)
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#define XDEV_U2 (0x2 << 5)
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#define XDEV_U3 (0x3 << 5)
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#define XDEV_RESUME (0xf << 5)
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/* true: port has power (see HCC_PPC) */
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#define PORT_POWER (1 << 9)
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/* bits 10:13 indicate device speed:
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* 0 - undefined speed - port hasn't be initialized by a reset yet
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* 1 - full speed
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* 2 - low speed
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* 3 - high speed
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* 4 - super speed
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* 5-15 reserved
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*/
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#define DEV_SPEED_MASK (0xf << 10)
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#define XDEV_FS (0x1 << 10)
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#define XDEV_LS (0x2 << 10)
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#define XDEV_HS (0x3 << 10)
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#define XDEV_SS (0x4 << 10)
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#define DEV_UNDEFSPEED(p) (((p) & DEV_SPEED_MASK) == (0x0<<10))
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#define DEV_FULLSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_FS)
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#define DEV_LOWSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_LS)
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#define DEV_HIGHSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_HS)
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#define DEV_SUPERSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_SS)
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/* Bits 20:23 in the Slot Context are the speed for the device */
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#define SLOT_SPEED_FS (XDEV_FS << 10)
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#define SLOT_SPEED_LS (XDEV_LS << 10)
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#define SLOT_SPEED_HS (XDEV_HS << 10)
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#define SLOT_SPEED_SS (XDEV_SS << 10)
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/* Port Indicator Control */
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#define PORT_LED_OFF (0 << 14)
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#define PORT_LED_AMBER (1 << 14)
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#define PORT_LED_GREEN (2 << 14)
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#define PORT_LED_MASK (3 << 14)
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/* Port Link State Write Strobe - set this when changing link state */
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#define PORT_LINK_STROBE (1 << 16)
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/* true: connect status change */
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#define PORT_CSC (1 << 17)
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/* true: port enable change */
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#define PORT_PEC (1 << 18)
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/* true: warm reset for a USB 3.0 device is done. A "hot" reset puts the port
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* into an enabled state, and the device into the default state. A "warm" reset
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* also resets the link, forcing the device through the link training sequence.
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* SW can also look at the Port Reset register to see when warm reset is done.
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*/
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#define PORT_WRC (1 << 19)
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/* true: over-current change */
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#define PORT_OCC (1 << 20)
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/* true: reset change - 1 to 0 transition of PORT_RESET */
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#define PORT_RC (1 << 21)
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/* port link status change - set on some port link state transitions:
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* Transition Reason
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* --------------------------------------------------------------------------
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* - U3 to Resume Wakeup signaling from a device
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* - Resume to Recovery to U0 USB 3.0 device resume
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* - Resume to U0 USB 2.0 device resume
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* - U3 to Recovery to U0 Software resume of USB 3.0 device complete
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* - U3 to U0 Software resume of USB 2.0 device complete
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* - U2 to U0 L1 resume of USB 2.1 device complete
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* - U0 to U0 (???) L1 entry rejection by USB 2.1 device
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* - U0 to disabled L1 entry error with USB 2.1 device
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* - Any state to inactive Error on USB 3.0 port
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*/
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#define PORT_PLC (1 << 22)
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/* port configure error change - port failed to configure its link partner */
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#define PORT_CEC (1 << 23)
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/* bit 24 reserved */
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/* wake on connect (enable) */
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#define PORT_WKCONN_E (1 << 25)
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/* wake on disconnect (enable) */
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#define PORT_WKDISC_E (1 << 26)
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/* wake on over-current (enable) */
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#define PORT_WKOC_E (1 << 27)
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/* bits 28:29 reserved */
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/* true: device is removable - for USB 3.0 roothub emulation */
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#define PORT_DEV_REMOVE (1 << 30)
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/* Initiate a warm port reset - complete when PORT_WRC is '1' */
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#define PORT_WR (1 << 31)
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/* We mark duplicate entries with -1 */
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#define DUPLICATE_ENTRY ((u8)(-1))
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/* Port Power Management Status and Control - port_power_base bitmasks */
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/* Inactivity timer value for transitions into U1, in microseconds.
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* Timeout can be up to 127us. 0xFF means an infinite timeout.
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*/
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#define PORT_U1_TIMEOUT(p) ((p) & 0xff)
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/* Inactivity timer value for transitions into U2 */
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#define PORT_U2_TIMEOUT(p) (((p) & 0xff) << 8)
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/* Bits 24:31 for port testing */
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/* USB2 Protocol PORTSPMSC */
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#define PORT_L1S_MASK 7
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#define PORT_L1S_SUCCESS 1
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#define PORT_RWE (1 << 3)
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#define PORT_HIRD(p) (((p) & 0xf) << 4)
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#define PORT_HIRD_MASK (0xf << 4)
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#define PORT_L1DS(p) (((p) & 0xff) << 8)
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#define PORT_HLE (1 << 16)
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/**
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* struct xhci_intr_reg - Interrupt Register Set
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* @irq_pending: IMAN - Interrupt Management Register. Used to enable
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* interrupts and check for pending interrupts.
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* @irq_control: IMOD - Interrupt Moderation Register.
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* Used to throttle interrupts.
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* @erst_size: Number of segments in the
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Event Ring Segment Table (ERST).
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* @erst_base: ERST base address.
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* @erst_dequeue: Event ring dequeue pointer.
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*
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* Each interrupter (defined by a MSI-X vector) has an event ring and an Event
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* Ring Segment Table (ERST) associated with it.
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* The event ring is comprised of multiple segments of the same size.
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* The HC places events on the ring and "updates the Cycle bit in the TRBs to
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* indicate to software the current position of the Enqueue Pointer."
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* The HCD (Linux) processes those events and updates the dequeue pointer.
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*/
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struct xhci_intr_reg {
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volatile __le32 irq_pending;
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volatile __le32 irq_control;
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volatile __le32 erst_size;
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volatile __le32 rsvd;
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volatile __le64 erst_base;
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volatile __le64 erst_dequeue;
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};
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/* irq_pending bitmasks */
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#define ER_IRQ_PENDING(p) ((p) & 0x1)
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/* bits 2:31 need to be preserved */
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/* THIS IS BUGGY - FIXME - IP IS WRITE 1 TO CLEAR */
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#define ER_IRQ_CLEAR(p) ((p) & 0xfffffffe)
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#define ER_IRQ_ENABLE(p) ((ER_IRQ_CLEAR(p)) | 0x2)
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#define ER_IRQ_DISABLE(p) ((ER_IRQ_CLEAR(p)) & ~(0x2))
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/* irq_control bitmasks */
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/* Minimum interval between interrupts (in 250ns intervals). The interval
|
|
* between interrupts will be longer if there are no events on the event ring.
|
|
* Default is 4000 (1 ms).
|
|
*/
|
|
#define ER_IRQ_INTERVAL_MASK (0xffff)
|
|
/* Counter used to count down the time to the next interrupt - HW use only */
|
|
#define ER_IRQ_COUNTER_MASK (0xffff << 16)
|
|
|
|
/* erst_size bitmasks */
|
|
/* Preserve bits 16:31 of erst_size */
|
|
#define ERST_SIZE_MASK (0xffff << 16)
|
|
|
|
/* erst_dequeue bitmasks */
|
|
/* Dequeue ERST Segment Index (DESI) - Segment number (or alias)
|
|
* where the current dequeue pointer lies. This is an optional HW hint.
|
|
*/
|
|
#define ERST_DESI_MASK (0x7)
|
|
/* Event Handler Busy (EHB) - is the event ring scheduled to be serviced by
|
|
* a work queue (or delayed service routine)?
|
|
*/
|
|
#define ERST_EHB (1 << 3)
|
|
#define ERST_PTR_MASK (0xf)
|
|
|
|
/**
|
|
* struct xhci_run_regs
|
|
* @microframe_index: MFINDEX - current microframe number
|
|
*
|
|
* Section 5.5 Host Controller Runtime Registers:
|
|
* "Software should read and write these registers using only Dword (32 bit)
|
|
* or larger accesses"
|
|
*/
|
|
struct xhci_run_regs {
|
|
__le32 microframe_index;
|
|
__le32 rsvd[7];
|
|
struct xhci_intr_reg ir_set[128];
|
|
};
|
|
|
|
/**
|
|
* struct doorbell_array
|
|
*
|
|
* Bits 0 - 7: Endpoint target
|
|
* Bits 8 - 15: RsvdZ
|
|
* Bits 16 - 31: Stream ID
|
|
*
|
|
* Section 5.6
|
|
*/
|
|
struct xhci_doorbell_array {
|
|
volatile __le32 doorbell[256];
|
|
};
|
|
|
|
#define DB_VALUE(ep, stream) ((((ep) + 1) & 0xff) | ((stream) << 16))
|
|
#define DB_VALUE_HOST 0x00000000
|
|
|
|
/**
|
|
* struct xhci_protocol_caps
|
|
* @revision: major revision, minor revision, capability ID,
|
|
* and next capability pointer.
|
|
* @name_string: Four ASCII characters to say which spec this xHC
|
|
* follows, typically "USB ".
|
|
* @port_info: Port offset, count, and protocol-defined information.
|
|
*/
|
|
struct xhci_protocol_caps {
|
|
u32 revision;
|
|
u32 name_string;
|
|
u32 port_info;
|
|
};
|
|
|
|
#define XHCI_EXT_PORT_MAJOR(x) (((x) >> 24) & 0xff)
|
|
#define XHCI_EXT_PORT_OFF(x) ((x) & 0xff)
|
|
#define XHCI_EXT_PORT_COUNT(x) (((x) >> 8) & 0xff)
|
|
|
|
/**
|
|
* struct xhci_container_ctx
|
|
* @type: Type of context. Used to calculated offsets to contained contexts.
|
|
* @size: Size of the context data
|
|
* @bytes: The raw context data given to HW
|
|
* @dma: dma address of the bytes
|
|
*
|
|
* Represents either a Device or Input context. Holds a pointer to the raw
|
|
* memory used for the context (bytes) and dma address of it (dma).
|
|
*/
|
|
struct xhci_container_ctx {
|
|
unsigned type;
|
|
#define XHCI_CTX_TYPE_DEVICE 0x1
|
|
#define XHCI_CTX_TYPE_INPUT 0x2
|
|
|
|
int size;
|
|
u8 *bytes;
|
|
};
|
|
|
|
/**
|
|
* struct xhci_slot_ctx
|
|
* @dev_info: Route string, device speed, hub info, and last valid endpoint
|
|
* @dev_info2: Max exit latency for device number, root hub port number
|
|
* @tt_info: tt_info is used to construct split transaction tokens
|
|
* @dev_state: slot state and device address
|
|
*
|
|
* Slot Context - section 6.2.1.1. This assumes the HC uses 32-byte context
|
|
* structures. If the HC uses 64-byte contexts, there is an additional 32 bytes
|
|
* reserved at the end of the slot context for HC internal use.
|
|
*/
|
|
struct xhci_slot_ctx {
|
|
__le32 dev_info;
|
|
__le32 dev_info2;
|
|
__le32 tt_info;
|
|
__le32 dev_state;
|
|
/* offset 0x10 to 0x1f reserved for HC internal use */
|
|
__le32 reserved[4];
|
|
};
|
|
|
|
/* dev_info bitmasks */
|
|
/* Route String - 0:19 */
|
|
#define ROUTE_STRING_MASK (0xfffff)
|
|
/* Device speed - values defined by PORTSC Device Speed field - 20:23 */
|
|
#define DEV_SPEED (0xf << 20)
|
|
/* bit 24 reserved */
|
|
/* Is this LS/FS device connected through a HS hub? - bit 25 */
|
|
#define DEV_MTT (0x1 << 25)
|
|
/* Set if the device is a hub - bit 26 */
|
|
#define DEV_HUB (0x1 << 26)
|
|
/* Index of the last valid endpoint context in this device context - 27:31 */
|
|
#define LAST_CTX_MASK (0x1f << 27)
|
|
#define LAST_CTX(p) ((p) << 27)
|
|
#define LAST_CTX_TO_EP_NUM(p) (((p) >> 27) - 1)
|
|
#define SLOT_FLAG (1 << 0)
|
|
#define EP0_FLAG (1 << 1)
|
|
|
|
/* dev_info2 bitmasks */
|
|
/* Max Exit Latency (ms) - worst case time to wake up all links in dev path */
|
|
#define MAX_EXIT (0xffff)
|
|
/* Root hub port number that is needed to access the USB device */
|
|
#define ROOT_HUB_PORT(p) (((p) & 0xff) << 16)
|
|
#define ROOT_HUB_PORT_MASK (0xff)
|
|
#define ROOT_HUB_PORT_SHIFT (16)
|
|
#define DEVINFO_TO_ROOT_HUB_PORT(p) (((p) >> 16) & 0xff)
|
|
/* Maximum number of ports under a hub device */
|
|
#define XHCI_MAX_PORTS(p) (((p) & 0xff) << 24)
|
|
|
|
/* tt_info bitmasks */
|
|
/*
|
|
* TT Hub Slot ID - for low or full speed devices attached to a high-speed hub
|
|
* The Slot ID of the hub that isolates the high speed signaling from
|
|
* this low or full-speed device. '0' if attached to root hub port.
|
|
*/
|
|
#define TT_SLOT (0xff)
|
|
/*
|
|
* The number of the downstream facing port of the high-speed hub
|
|
* '0' if the device is not low or full speed.
|
|
*/
|
|
#define TT_PORT (0xff << 8)
|
|
#define TT_THINK_TIME(p) (((p) & 0x3) << 16)
|
|
|
|
/* dev_state bitmasks */
|
|
/* USB device address - assigned by the HC */
|
|
#define DEV_ADDR_MASK (0xff)
|
|
/* bits 8:26 reserved */
|
|
/* Slot state */
|
|
#define SLOT_STATE (0x1f << 27)
|
|
#define GET_SLOT_STATE(p) (((p) & (0x1f << 27)) >> 27)
|
|
|
|
#define SLOT_STATE_DISABLED 0
|
|
#define SLOT_STATE_ENABLED SLOT_STATE_DISABLED
|
|
#define SLOT_STATE_DEFAULT 1
|
|
#define SLOT_STATE_ADDRESSED 2
|
|
#define SLOT_STATE_CONFIGURED 3
|
|
|
|
/**
|
|
* struct xhci_ep_ctx
|
|
* @ep_info: endpoint state, streams, mult, and interval information.
|
|
* @ep_info2: information on endpoint type, max packet size, max burst size,
|
|
* error count, and whether the HC will force an event for all
|
|
* transactions.
|
|
* @deq: 64-bit ring dequeue pointer address. If the endpoint only
|
|
* defines one stream, this points to the endpoint transfer ring.
|
|
* Otherwise, it points to a stream context array, which has a
|
|
* ring pointer for each flow.
|
|
* @tx_info:
|
|
* Average TRB lengths for the endpoint ring and
|
|
* max payload within an Endpoint Service Interval Time (ESIT).
|
|
*
|
|
* Endpoint Context - section 6.2.1.2.This assumes the HC uses 32-byte context
|
|
* structures.If the HC uses 64-byte contexts, there is an additional 32 bytes
|
|
* reserved at the end of the endpoint context for HC internal use.
|
|
*/
|
|
struct xhci_ep_ctx {
|
|
__le32 ep_info;
|
|
__le32 ep_info2;
|
|
__le64 deq;
|
|
__le32 tx_info;
|
|
/* offset 0x14 - 0x1f reserved for HC internal use */
|
|
__le32 reserved[3];
|
|
};
|
|
|
|
/* ep_info bitmasks */
|
|
/*
|
|
* Endpoint State - bits 0:2
|
|
* 0 - disabled
|
|
* 1 - running
|
|
* 2 - halted due to halt condition - ok to manipulate endpoint ring
|
|
* 3 - stopped
|
|
* 4 - TRB error
|
|
* 5-7 - reserved
|
|
*/
|
|
#define EP_STATE_MASK (0xf)
|
|
#define EP_STATE_DISABLED 0
|
|
#define EP_STATE_RUNNING 1
|
|
#define EP_STATE_HALTED 2
|
|
#define EP_STATE_STOPPED 3
|
|
#define EP_STATE_ERROR 4
|
|
/* Mult - Max number of burtst within an interval, in EP companion desc. */
|
|
#define EP_MULT(p) (((p) & 0x3) << 8)
|
|
#define CTX_TO_EP_MULT(p) (((p) >> 8) & 0x3)
|
|
/* bits 10:14 are Max Primary Streams */
|
|
/* bit 15 is Linear Stream Array */
|
|
/* Interval - period between requests to an endpoint - 125u increments. */
|
|
#define EP_INTERVAL(p) (((p) & 0xff) << 16)
|
|
#define EP_INTERVAL_TO_UFRAMES(p) (1 << (((p) >> 16) & 0xff))
|
|
#define CTX_TO_EP_INTERVAL(p) (((p) >> 16) & 0xff)
|
|
#define EP_MAXPSTREAMS_MASK (0x1f << 10)
|
|
#define EP_MAXPSTREAMS(p) (((p) << 10) & EP_MAXPSTREAMS_MASK)
|
|
/* Endpoint is set up with a Linear Stream Array (vs. Secondary Stream Array) */
|
|
#define EP_HAS_LSA (1 << 15)
|
|
|
|
/* ep_info2 bitmasks */
|
|
/*
|
|
* Force Event - generate transfer events for all TRBs for this endpoint
|
|
* This will tell the HC to ignore the IOC and ISP flags (for debugging only).
|
|
*/
|
|
#define FORCE_EVENT (0x1)
|
|
#define ERROR_COUNT(p) (((p) & 0x3) << 1)
|
|
#define ERROR_COUNT_SHIFT (1)
|
|
#define ERROR_COUNT_MASK (0x3)
|
|
#define CTX_TO_EP_TYPE(p) (((p) >> 3) & 0x7)
|
|
#define EP_TYPE(p) ((p) << 3)
|
|
#define EP_TYPE_SHIFT (3)
|
|
#define ISOC_OUT_EP 1
|
|
#define BULK_OUT_EP 2
|
|
#define INT_OUT_EP 3
|
|
#define CTRL_EP 4
|
|
#define ISOC_IN_EP 5
|
|
#define BULK_IN_EP 6
|
|
#define INT_IN_EP 7
|
|
/* bit 6 reserved */
|
|
/* bit 7 is Host Initiate Disable - for disabling stream selection */
|
|
#define MAX_BURST(p) (((p)&0xff) << 8)
|
|
#define MAX_BURST_MASK (0xff)
|
|
#define MAX_BURST_SHIFT (8)
|
|
#define CTX_TO_MAX_BURST(p) (((p) >> 8) & 0xff)
|
|
#define MAX_PACKET(p) (((p)&0xffff) << 16)
|
|
#define MAX_PACKET_MASK (0xffff)
|
|
#define MAX_PACKET_DECODED(p) (((p) >> 16) & 0xffff)
|
|
#define MAX_PACKET_SHIFT (16)
|
|
|
|
/* Get max packet size from ep desc. Bit 10..0 specify the max packet size.
|
|
* USB2.0 spec 9.6.6.
|
|
*/
|
|
#define GET_MAX_PACKET(p) ((p) & 0x7ff)
|
|
|
|
/* tx_info bitmasks */
|
|
#define AVG_TRB_LENGTH_FOR_EP(p) ((p) & 0xffff)
|
|
#define MAX_ESIT_PAYLOAD_FOR_EP(p) (((p) & 0xffff) << 16)
|
|
#define CTX_TO_MAX_ESIT_PAYLOAD(p) (((p) >> 16) & 0xffff)
|
|
|
|
/* deq bitmasks */
|
|
#define EP_CTX_CYCLE_MASK (1 << 0)
|
|
|
|
|
|
/**
|
|
* struct xhci_input_control_context
|
|
* Input control context; see section 6.2.5.
|
|
*
|
|
* @drop_context: set the bit of the endpoint context you want to disable
|
|
* @add_context: set the bit of the endpoint context you want to enable
|
|
*/
|
|
struct xhci_input_control_ctx {
|
|
volatile __le32 drop_flags;
|
|
volatile __le32 add_flags;
|
|
__le32 rsvd2[6];
|
|
};
|
|
|
|
|
|
/**
|
|
* struct xhci_device_context_array
|
|
* @dev_context_ptr array of 64-bit DMA addresses for device contexts
|
|
*/
|
|
struct xhci_device_context_array {
|
|
/* 64-bit device addresses; we only write 32-bit addresses */
|
|
__le64 dev_context_ptrs[MAX_HC_SLOTS];
|
|
};
|
|
/* TODO: write function to set the 64-bit device DMA address */
|
|
/*
|
|
* TODO: change this to be dynamically sized at HC mem init time since the HC
|
|
* might not be able to handle the maximum number of devices possible.
|
|
*/
|
|
|
|
|
|
struct xhci_transfer_event {
|
|
/* 64-bit buffer address, or immediate data */
|
|
__le64 buffer;
|
|
__le32 transfer_len;
|
|
/* This field is interpreted differently based on the type of TRB */
|
|
volatile __le32 flags;
|
|
};
|
|
|
|
/* Transfer event TRB length bit mask */
|
|
/* bits 0:23 */
|
|
#define EVENT_TRB_LEN(p) ((p) & 0xffffff)
|
|
|
|
/** Transfer Event bit fields **/
|
|
#define TRB_TO_EP_ID(p) (((p) >> 16) & 0x1f)
|
|
|
|
/* Completion Code - only applicable for some types of TRBs */
|
|
#define COMP_CODE_MASK (0xff << 24)
|
|
#define COMP_CODE_SHIFT (24)
|
|
#define GET_COMP_CODE(p) (((p) & COMP_CODE_MASK) >> 24)
|
|
|
|
typedef enum {
|
|
COMP_SUCCESS = 1,
|
|
/* Data Buffer Error */
|
|
COMP_DB_ERR, /* 2 */
|
|
/* Babble Detected Error */
|
|
COMP_BABBLE, /* 3 */
|
|
/* USB Transaction Error */
|
|
COMP_TX_ERR, /* 4 */
|
|
/* TRB Error - some TRB field is invalid */
|
|
COMP_TRB_ERR, /* 5 */
|
|
/* Stall Error - USB device is stalled */
|
|
COMP_STALL, /* 6 */
|
|
/* Resource Error - HC doesn't have memory for that device configuration */
|
|
COMP_ENOMEM, /* 7 */
|
|
/* Bandwidth Error - not enough room in schedule for this dev config */
|
|
COMP_BW_ERR, /* 8 */
|
|
/* No Slots Available Error - HC ran out of device slots */
|
|
COMP_ENOSLOTS, /* 9 */
|
|
/* Invalid Stream Type Error */
|
|
COMP_STREAM_ERR, /* 10 */
|
|
/* Slot Not Enabled Error - doorbell rung for disabled device slot */
|
|
COMP_EBADSLT, /* 11 */
|
|
/* Endpoint Not Enabled Error */
|
|
COMP_EBADEP,/* 12 */
|
|
/* Short Packet */
|
|
COMP_SHORT_TX, /* 13 */
|
|
/* Ring Underrun - doorbell rung for an empty isoc OUT ep ring */
|
|
COMP_UNDERRUN, /* 14 */
|
|
/* Ring Overrun - isoc IN ep ring is empty when ep is scheduled to RX */
|
|
COMP_OVERRUN, /* 15 */
|
|
/* Virtual Function Event Ring Full Error */
|
|
COMP_VF_FULL, /* 16 */
|
|
/* Parameter Error - Context parameter is invalid */
|
|
COMP_EINVAL, /* 17 */
|
|
/* Bandwidth Overrun Error - isoc ep exceeded its allocated bandwidth */
|
|
COMP_BW_OVER,/* 18 */
|
|
/* Context State Error - illegal context state transition requested */
|
|
COMP_CTX_STATE,/* 19 */
|
|
/* No Ping Response Error - HC didn't get PING_RESPONSE in time to TX */
|
|
COMP_PING_ERR,/* 20 */
|
|
/* Event Ring is full */
|
|
COMP_ER_FULL,/* 21 */
|
|
/* Incompatible Device Error */
|
|
COMP_DEV_ERR,/* 22 */
|
|
/* Missed Service Error - HC couldn't service an isoc ep within interval */
|
|
COMP_MISSED_INT,/* 23 */
|
|
/* Successfully stopped command ring */
|
|
COMP_CMD_STOP, /* 24 */
|
|
/* Successfully aborted current command and stopped command ring */
|
|
COMP_CMD_ABORT, /* 25 */
|
|
/* Stopped - transfer was terminated by a stop endpoint command */
|
|
COMP_STOP,/* 26 */
|
|
/* Same as COMP_EP_STOPPED, but the transferred length in the event
|
|
* is invalid */
|
|
COMP_STOP_INVAL, /* 27*/
|
|
/* Control Abort Error - Debug Capability - control pipe aborted */
|
|
COMP_DBG_ABORT, /* 28 */
|
|
/* Max Exit Latency Too Large Error */
|
|
COMP_MEL_ERR,/* 29 */
|
|
/* TRB type 30 reserved */
|
|
/* Isoc Buffer Overrun - an isoc IN ep sent more data than could fit in TD */
|
|
COMP_BUFF_OVER = 31,
|
|
/* Event Lost Error - xHC has an "internal event overrun condition" */
|
|
COMP_ISSUES, /* 32 */
|
|
/* Undefined Error - reported when other error codes don't apply */
|
|
COMP_UNKNOWN, /* 33 */
|
|
/* Invalid Stream ID Error */
|
|
COMP_STRID_ERR, /* 34 */
|
|
/* Secondary Bandwidth Error - may be returned by a Configure Endpoint cmd */
|
|
COMP_2ND_BW_ERR, /* 35 */
|
|
/* Split Transaction Error */
|
|
COMP_SPLIT_ERR /* 36 */
|
|
|
|
} xhci_comp_code;
|
|
|
|
struct xhci_link_trb {
|
|
/* 64-bit segment pointer*/
|
|
volatile __le64 segment_ptr;
|
|
volatile __le32 intr_target;
|
|
volatile __le32 control;
|
|
};
|
|
|
|
/* control bitfields */
|
|
#define LINK_TOGGLE (0x1 << 1)
|
|
|
|
/* Command completion event TRB */
|
|
struct xhci_event_cmd {
|
|
/* Pointer to command TRB, or the value passed by the event data trb */
|
|
volatile __le64 cmd_trb;
|
|
volatile __le32 status;
|
|
volatile __le32 flags;
|
|
};
|
|
|
|
/* flags bitmasks */
|
|
/* bits 16:23 are the virtual function ID */
|
|
/* bits 24:31 are the slot ID */
|
|
#define TRB_TO_SLOT_ID(p) (((p) & (0xff << 24)) >> 24)
|
|
#define TRB_TO_SLOT_ID_SHIFT (24)
|
|
#define TRB_TO_SLOT_ID_MASK (0xff << TRB_TO_SLOT_ID_SHIFT)
|
|
#define SLOT_ID_FOR_TRB(p) (((p) & 0xff) << 24)
|
|
#define SLOT_ID_FOR_TRB_MASK (0xff)
|
|
#define SLOT_ID_FOR_TRB_SHIFT (24)
|
|
|
|
/* Stop Endpoint TRB - ep_index to endpoint ID for this TRB */
|
|
#define TRB_TO_EP_INDEX(p) ((((p) & (0x1f << 16)) >> 16) - 1)
|
|
#define EP_ID_FOR_TRB(p) ((((p) + 1) & 0x1f) << 16)
|
|
|
|
#define SUSPEND_PORT_FOR_TRB(p) (((p) & 1) << 23)
|
|
#define TRB_TO_SUSPEND_PORT(p) (((p) & (1 << 23)) >> 23)
|
|
#define LAST_EP_INDEX 30
|
|
|
|
/* Set TR Dequeue Pointer command TRB fields */
|
|
#define TRB_TO_STREAM_ID(p) ((((p) & (0xffff << 16)) >> 16))
|
|
#define STREAM_ID_FOR_TRB(p) ((((p)) & 0xffff) << 16)
|
|
|
|
|
|
/* Port Status Change Event TRB fields */
|
|
/* Port ID - bits 31:24 */
|
|
#define GET_PORT_ID(p) (((p) & (0xff << 24)) >> 24)
|
|
#define PORT_ID_SHIFT (24)
|
|
#define PORT_ID_MASK (0xff << PORT_ID_SHIFT)
|
|
|
|
/* Normal TRB fields */
|
|
/* transfer_len bitmasks - bits 0:16 */
|
|
#define TRB_LEN(p) ((p) & 0x1ffff)
|
|
#define TRB_LEN_MASK (0x1ffff)
|
|
/* Interrupter Target - which MSI-X vector to target the completion event at */
|
|
#define TRB_INTR_TARGET_SHIFT (22)
|
|
#define TRB_INTR_TARGET_MASK (0x3ff)
|
|
#define TRB_INTR_TARGET(p) (((p) & 0x3ff) << 22)
|
|
#define GET_INTR_TARGET(p) (((p) >> 22) & 0x3ff)
|
|
#define TRB_TBC(p) (((p) & 0x3) << 7)
|
|
#define TRB_TLBPC(p) (((p) & 0xf) << 16)
|
|
|
|
/* Cycle bit - indicates TRB ownership by HC or HCD */
|
|
#define TRB_CYCLE (1<<0)
|
|
/*
|
|
* Force next event data TRB to be evaluated before task switch.
|
|
* Used to pass OS data back after a TD completes.
|
|
*/
|
|
#define TRB_ENT (1<<1)
|
|
/* Interrupt on short packet */
|
|
#define TRB_ISP (1<<2)
|
|
/* Set PCIe no snoop attribute */
|
|
#define TRB_NO_SNOOP (1<<3)
|
|
/* Chain multiple TRBs into a TD */
|
|
#define TRB_CHAIN (1<<4)
|
|
/* Interrupt on completion */
|
|
#define TRB_IOC (1<<5)
|
|
/* The buffer pointer contains immediate data */
|
|
#define TRB_IDT (1<<6)
|
|
|
|
/* Block Event Interrupt */
|
|
#define TRB_BEI (1<<9)
|
|
|
|
/* Control transfer TRB specific fields */
|
|
#define TRB_DIR_IN (1<<16)
|
|
#define TRB_TX_TYPE(p) ((p) << 16)
|
|
#define TRB_TX_TYPE_SHIFT (16)
|
|
#define TRB_DATA_OUT 2
|
|
#define TRB_DATA_IN 3
|
|
|
|
/* Isochronous TRB specific fields */
|
|
#define TRB_SIA (1 << 31)
|
|
|
|
struct xhci_generic_trb {
|
|
volatile __le32 field[4];
|
|
};
|
|
|
|
union xhci_trb {
|
|
struct xhci_link_trb link;
|
|
struct xhci_transfer_event trans_event;
|
|
struct xhci_event_cmd event_cmd;
|
|
struct xhci_generic_trb generic;
|
|
};
|
|
|
|
/* TRB bit mask */
|
|
#define TRB_TYPE_BITMASK (0xfc00)
|
|
#define TRB_TYPE(p) ((p) << 10)
|
|
#define TRB_TYPE_SHIFT (10)
|
|
#define TRB_FIELD_TO_TYPE(p) (((p) & TRB_TYPE_BITMASK) >> 10)
|
|
|
|
/* TRB type IDs */
|
|
typedef enum {
|
|
/* bulk, interrupt, isoc scatter/gather, and control data stage */
|
|
TRB_NORMAL = 1,
|
|
/* setup stage for control transfers */
|
|
TRB_SETUP, /* 2 */
|
|
/* data stage for control transfers */
|
|
TRB_DATA, /* 3 */
|
|
/* status stage for control transfers */
|
|
TRB_STATUS, /* 4 */
|
|
/* isoc transfers */
|
|
TRB_ISOC, /* 5 */
|
|
/* TRB for linking ring segments */
|
|
TRB_LINK, /* 6 */
|
|
/* TRB for EVENT DATA */
|
|
TRB_EVENT_DATA, /* 7 */
|
|
/* Transfer Ring No-op (not for the command ring) */
|
|
TRB_TR_NOOP, /* 8 */
|
|
/* Command TRBs */
|
|
/* Enable Slot Command */
|
|
TRB_ENABLE_SLOT, /* 9 */
|
|
/* Disable Slot Command */
|
|
TRB_DISABLE_SLOT, /* 10 */
|
|
/* Address Device Command */
|
|
TRB_ADDR_DEV, /* 11 */
|
|
/* Configure Endpoint Command */
|
|
TRB_CONFIG_EP, /* 12 */
|
|
/* Evaluate Context Command */
|
|
TRB_EVAL_CONTEXT, /* 13 */
|
|
/* Reset Endpoint Command */
|
|
TRB_RESET_EP, /* 14 */
|
|
/* Stop Transfer Ring Command */
|
|
TRB_STOP_RING, /* 15 */
|
|
/* Set Transfer Ring Dequeue Pointer Command */
|
|
TRB_SET_DEQ, /* 16 */
|
|
/* Reset Device Command */
|
|
TRB_RESET_DEV, /* 17 */
|
|
/* Force Event Command (opt) */
|
|
TRB_FORCE_EVENT, /* 18 */
|
|
/* Negotiate Bandwidth Command (opt) */
|
|
TRB_NEG_BANDWIDTH, /* 19 */
|
|
/* Set Latency Tolerance Value Command (opt) */
|
|
TRB_SET_LT, /* 20 */
|
|
/* Get port bandwidth Command */
|
|
TRB_GET_BW, /* 21 */
|
|
/* Force Header Command - generate a transaction or link management packet */
|
|
TRB_FORCE_HEADER, /* 22 */
|
|
/* No-op Command - not for transfer rings */
|
|
TRB_CMD_NOOP, /* 23 */
|
|
/* TRB IDs 24-31 reserved */
|
|
/* Event TRBS */
|
|
/* Transfer Event */
|
|
TRB_TRANSFER = 32,
|
|
/* Command Completion Event */
|
|
TRB_COMPLETION, /* 33 */
|
|
/* Port Status Change Event */
|
|
TRB_PORT_STATUS, /* 34 */
|
|
/* Bandwidth Request Event (opt) */
|
|
TRB_BANDWIDTH_EVENT, /* 35 */
|
|
/* Doorbell Event (opt) */
|
|
TRB_DOORBELL, /* 36 */
|
|
/* Host Controller Event */
|
|
TRB_HC_EVENT, /* 37 */
|
|
/* Device Notification Event - device sent function wake notification */
|
|
TRB_DEV_NOTE, /* 38 */
|
|
/* MFINDEX Wrap Event - microframe counter wrapped */
|
|
TRB_MFINDEX_WRAP, /* 39 */
|
|
/* TRB IDs 40-47 reserved, 48-63 is vendor-defined */
|
|
/* Nec vendor-specific command completion event. */
|
|
TRB_NEC_CMD_COMP = 48, /* 48 */
|
|
/* Get NEC firmware revision. */
|
|
TRB_NEC_GET_FW, /* 49 */
|
|
} trb_type;
|
|
|
|
#define TRB_TYPE_LINK(x) (((x) & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK))
|
|
/* Above, but for __le32 types -- can avoid work by swapping constants: */
|
|
#define TRB_TYPE_LINK_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \
|
|
cpu_to_le32(TRB_TYPE(TRB_LINK)))
|
|
#define TRB_TYPE_NOOP_LE32(x) (((x) & cpu_to_le32(TRB_TYPE_BITMASK)) == \
|
|
cpu_to_le32(TRB_TYPE(TRB_TR_NOOP)))
|
|
|
|
/*
|
|
* TRBS_PER_SEGMENT must be a multiple of 4,
|
|
* since the command ring is 64-byte aligned.
|
|
* It must also be greater than 16.
|
|
*/
|
|
#define TRBS_PER_SEGMENT 64
|
|
/* Allow two commands + a link TRB, along with any reserved command TRBs */
|
|
#define MAX_RSVD_CMD_TRBS (TRBS_PER_SEGMENT - 3)
|
|
#define SEGMENT_SIZE (TRBS_PER_SEGMENT*16)
|
|
/* SEGMENT_SHIFT should be log2(SEGMENT_SIZE).
|
|
* Change this if you change TRBS_PER_SEGMENT!
|
|
*/
|
|
#define SEGMENT_SHIFT 10
|
|
/* TRB buffer pointers can't cross 64KB boundaries */
|
|
#define TRB_MAX_BUFF_SHIFT 16
|
|
#define TRB_MAX_BUFF_SIZE (1 << TRB_MAX_BUFF_SHIFT)
|
|
|
|
struct xhci_segment {
|
|
union xhci_trb *trbs;
|
|
/* private to HCD */
|
|
struct xhci_segment *next;
|
|
};
|
|
|
|
struct xhci_ring {
|
|
struct xhci_segment *first_seg;
|
|
union xhci_trb *enqueue;
|
|
struct xhci_segment *enq_seg;
|
|
union xhci_trb *dequeue;
|
|
struct xhci_segment *deq_seg;
|
|
/*
|
|
* Write the cycle state into the TRB cycle field to give ownership of
|
|
* the TRB to the host controller (if we are the producer), or to check
|
|
* if we own the TRB (if we are the consumer). See section 4.9.1.
|
|
*/
|
|
volatile u32 cycle_state;
|
|
unsigned int num_segs;
|
|
};
|
|
|
|
struct xhci_erst_entry {
|
|
/* 64-bit event ring segment address */
|
|
__le64 seg_addr;
|
|
__le32 seg_size;
|
|
/* Set to zero */
|
|
__le32 rsvd;
|
|
};
|
|
|
|
struct xhci_erst {
|
|
struct xhci_erst_entry *entries;
|
|
unsigned int num_entries;
|
|
/* Num entries the ERST can contain */
|
|
unsigned int erst_size;
|
|
};
|
|
|
|
/*
|
|
* Each segment table entry is 4*32bits long. 1K seems like an ok size:
|
|
* (1K bytes * 8bytes/bit) / (4*32 bits) = 64 segment entries in the table,
|
|
* meaning 64 ring segments.
|
|
* Initial allocated size of the ERST, in number of entries */
|
|
#define ERST_NUM_SEGS 3
|
|
/* Initial number of event segment rings allocated */
|
|
#define ERST_ENTRIES 3
|
|
/* Initial allocated size of the ERST, in number of entries */
|
|
#define ERST_SIZE 64
|
|
/* Poll every 60 seconds */
|
|
#define POLL_TIMEOUT 60
|
|
/* Stop endpoint command timeout (secs) for URB cancellation watchdog timer */
|
|
#define XHCI_STOP_EP_CMD_TIMEOUT 5
|
|
/* XXX: Make these module parameters */
|
|
|
|
struct xhci_virt_ep {
|
|
struct xhci_ring *ring;
|
|
unsigned int ep_state;
|
|
#define SET_DEQ_PENDING (1 << 0)
|
|
#define EP_HALTED (1 << 1) /* For stall handling */
|
|
#define EP_HALT_PENDING (1 << 2) /* For URB cancellation */
|
|
/* Transitioning the endpoint to using streams, don't enqueue URBs */
|
|
#define EP_GETTING_STREAMS (1 << 3)
|
|
#define EP_HAS_STREAMS (1 << 4)
|
|
/* Transitioning the endpoint to not using streams, don't enqueue URBs */
|
|
#define EP_GETTING_NO_STREAMS (1 << 5)
|
|
};
|
|
|
|
#define CTX_SIZE(_hcc) (HCC_64BYTE_CONTEXT(_hcc) ? 64 : 32)
|
|
|
|
struct xhci_virt_device {
|
|
struct usb_device *udev;
|
|
/*
|
|
* Commands to the hardware are passed an "input context" that
|
|
* tells the hardware what to change in its data structures.
|
|
* The hardware will return changes in an "output context" that
|
|
* software must allocate for the hardware. We need to keep
|
|
* track of input and output contexts separately because
|
|
* these commands might fail and we don't trust the hardware.
|
|
*/
|
|
struct xhci_container_ctx *out_ctx;
|
|
/* Used for addressing devices and configuration changes */
|
|
struct xhci_container_ctx *in_ctx;
|
|
/* Rings saved to ensure old alt settings can be re-instated */
|
|
#define XHCI_MAX_RINGS_CACHED 31
|
|
struct xhci_virt_ep eps[31];
|
|
};
|
|
|
|
/* TODO: copied from ehci.h - can be refactored? */
|
|
/* xHCI spec says all registers are little endian */
|
|
static inline unsigned int xhci_readl(uint32_t volatile *regs)
|
|
{
|
|
return readl(regs);
|
|
}
|
|
|
|
static inline void xhci_writel(uint32_t volatile *regs, const unsigned int val)
|
|
{
|
|
writel(val, regs);
|
|
}
|
|
|
|
/*
|
|
* Registers should always be accessed with double word or quad word accesses.
|
|
* Some xHCI implementations may support 64-bit address pointers. Registers
|
|
* with 64-bit address pointers should be written to with dword accesses by
|
|
* writing the low dword first (ptr[0]), then the high dword (ptr[1]) second.
|
|
* xHCI implementations that do not support 64-bit address pointers will ignore
|
|
* the high dword, and write order is irrelevant.
|
|
*/
|
|
static inline u64 xhci_readq(__le64 volatile *regs)
|
|
{
|
|
__u32 *ptr = (__u32 *)regs;
|
|
u64 val_lo = readl(ptr);
|
|
u64 val_hi = readl(ptr + 1);
|
|
return val_lo + (val_hi << 32);
|
|
}
|
|
|
|
static inline void xhci_writeq(__le64 volatile *regs, const u64 val)
|
|
{
|
|
__u32 *ptr = (__u32 *)regs;
|
|
u32 val_lo = lower_32_bits(val);
|
|
/* FIXME */
|
|
u32 val_hi = upper_32_bits(val);
|
|
writel(val_lo, ptr);
|
|
writel(val_hi, ptr + 1);
|
|
}
|
|
|
|
int xhci_hcd_init(int index, struct xhci_hccr **ret_hccr,
|
|
struct xhci_hcor **ret_hcor);
|
|
void xhci_hcd_stop(int index);
|
|
|
|
|
|
/*************************************************************
|
|
EXTENDED CAPABILITY DEFINITIONS
|
|
*************************************************************/
|
|
/* Up to 16 ms to halt an HC */
|
|
#define XHCI_MAX_HALT_USEC (16*1000)
|
|
/* HC not running - set to 1 when run/stop bit is cleared. */
|
|
#define XHCI_STS_HALT (1 << 0)
|
|
|
|
/* HCCPARAMS offset from PCI base address */
|
|
#define XHCI_HCC_PARAMS_OFFSET 0x10
|
|
/* HCCPARAMS contains the first extended capability pointer */
|
|
#define XHCI_HCC_EXT_CAPS(p) (((p)>>16)&0xffff)
|
|
|
|
/* Command and Status registers offset from the Operational Registers address */
|
|
#define XHCI_CMD_OFFSET 0x00
|
|
#define XHCI_STS_OFFSET 0x04
|
|
|
|
#define XHCI_MAX_EXT_CAPS 50
|
|
|
|
/* Capability Register */
|
|
/* bits 7:0 - how long is the Capabilities register */
|
|
#define XHCI_HC_LENGTH(p) (((p) >> 00) & 0x00ff)
|
|
|
|
/* Extended capability register fields */
|
|
#define XHCI_EXT_CAPS_ID(p) (((p) >> 0) & 0xff)
|
|
#define XHCI_EXT_CAPS_NEXT(p) (((p) >> 8) & 0xff)
|
|
#define XHCI_EXT_CAPS_VAL(p) ((p) >> 16)
|
|
/* Extended capability IDs - ID 0 reserved */
|
|
#define XHCI_EXT_CAPS_LEGACY 1
|
|
#define XHCI_EXT_CAPS_PROTOCOL 2
|
|
#define XHCI_EXT_CAPS_PM 3
|
|
#define XHCI_EXT_CAPS_VIRT 4
|
|
#define XHCI_EXT_CAPS_ROUTE 5
|
|
/* IDs 6-9 reserved */
|
|
#define XHCI_EXT_CAPS_DEBUG 10
|
|
/* USB Legacy Support Capability - section 7.1.1 */
|
|
#define XHCI_HC_BIOS_OWNED (1 << 16)
|
|
#define XHCI_HC_OS_OWNED (1 << 24)
|
|
|
|
/* USB Legacy Support Capability - section 7.1.1 */
|
|
/* Add this offset, plus the value of xECP in HCCPARAMS to the base address */
|
|
#define XHCI_LEGACY_SUPPORT_OFFSET (0x00)
|
|
|
|
/* USB Legacy Support Control and Status Register - section 7.1.2 */
|
|
/* Add this offset, plus the value of xECP in HCCPARAMS to the base address */
|
|
#define XHCI_LEGACY_CONTROL_OFFSET (0x04)
|
|
/* bits 1:2, 5:12, and 17:19 need to be preserved; bits 21:28 should be zero */
|
|
#define XHCI_LEGACY_DISABLE_SMI ((0x3 << 1) + (0xff << 5) + (0x7 << 17))
|
|
|
|
/* USB 2.0 xHCI 0.96 L1C capability - section 7.2.2.1.3.2 */
|
|
#define XHCI_L1C (1 << 16)
|
|
|
|
/* USB 2.0 xHCI 1.0 hardware LMP capability - section 7.2.2.1.3.2 */
|
|
#define XHCI_HLC (1 << 19)
|
|
|
|
/* command register values to disable interrupts and halt the HC */
|
|
/* start/stop HC execution - do not write unless HC is halted*/
|
|
#define XHCI_CMD_RUN (1 << 0)
|
|
/* Event Interrupt Enable - get irq when EINT bit is set in USBSTS register */
|
|
#define XHCI_CMD_EIE (1 << 2)
|
|
/* Host System Error Interrupt Enable - get irq when HSEIE bit set in USBSTS */
|
|
#define XHCI_CMD_HSEIE (1 << 3)
|
|
/* Enable Wrap Event - '1' means xHC generates an event when MFINDEX wraps. */
|
|
#define XHCI_CMD_EWE (1 << 10)
|
|
|
|
#define XHCI_IRQS (XHCI_CMD_EIE | XHCI_CMD_HSEIE | XHCI_CMD_EWE)
|
|
|
|
/* true: Controller Not Ready to accept doorbell or op reg writes after reset */
|
|
#define XHCI_STS_CNR (1 << 11)
|
|
|
|
struct xhci_ctrl {
|
|
struct xhci_hccr *hccr; /* R/O registers, not need for volatile */
|
|
struct xhci_hcor *hcor;
|
|
struct xhci_doorbell_array *dba;
|
|
struct xhci_run_regs *run_regs;
|
|
struct xhci_device_context_array *dcbaa \
|
|
__attribute__ ((aligned(ARCH_DMA_MINALIGN)));
|
|
struct xhci_ring *event_ring;
|
|
struct xhci_ring *cmd_ring;
|
|
struct xhci_ring *transfer_ring;
|
|
struct xhci_segment *seg;
|
|
struct xhci_intr_reg *ir_set;
|
|
struct xhci_erst erst;
|
|
struct xhci_erst_entry entry[ERST_NUM_SEGS];
|
|
struct xhci_virt_device *devs[MAX_HC_SLOTS];
|
|
int rootdev;
|
|
};
|
|
|
|
unsigned long trb_addr(struct xhci_segment *seg, union xhci_trb *trb);
|
|
struct xhci_input_control_ctx
|
|
*xhci_get_input_control_ctx(struct xhci_container_ctx *ctx);
|
|
struct xhci_slot_ctx *xhci_get_slot_ctx(struct xhci_ctrl *ctrl,
|
|
struct xhci_container_ctx *ctx);
|
|
struct xhci_ep_ctx *xhci_get_ep_ctx(struct xhci_ctrl *ctrl,
|
|
struct xhci_container_ctx *ctx,
|
|
unsigned int ep_index);
|
|
void xhci_endpoint_copy(struct xhci_ctrl *ctrl,
|
|
struct xhci_container_ctx *in_ctx,
|
|
struct xhci_container_ctx *out_ctx,
|
|
unsigned int ep_index);
|
|
void xhci_slot_copy(struct xhci_ctrl *ctrl,
|
|
struct xhci_container_ctx *in_ctx,
|
|
struct xhci_container_ctx *out_ctx);
|
|
void xhci_setup_addressable_virt_dev(struct usb_device *udev);
|
|
void xhci_queue_command(struct xhci_ctrl *ctrl, u8 *ptr,
|
|
u32 slot_id, u32 ep_index, trb_type cmd);
|
|
void xhci_acknowledge_event(struct xhci_ctrl *ctrl);
|
|
union xhci_trb *xhci_wait_for_event(struct xhci_ctrl *ctrl, trb_type expected);
|
|
int xhci_bulk_tx(struct usb_device *udev, unsigned long pipe,
|
|
int length, void *buffer);
|
|
int xhci_ctrl_tx(struct usb_device *udev, unsigned long pipe,
|
|
struct devrequest *req, int length, void *buffer);
|
|
int xhci_check_maxpacket(struct usb_device *udev);
|
|
void xhci_flush_cache(uint32_t addr, u32 type_len);
|
|
void xhci_inval_cache(uint32_t addr, u32 type_len);
|
|
void xhci_cleanup(struct xhci_ctrl *ctrl);
|
|
struct xhci_ring *xhci_ring_alloc(unsigned int num_segs, bool link_trbs);
|
|
int xhci_alloc_virt_device(struct usb_device *udev);
|
|
int xhci_mem_init(struct xhci_ctrl *ctrl, struct xhci_hccr *hccr,
|
|
struct xhci_hcor *hcor);
|
|
|
|
#endif /* HOST_XHCI_H_ */
|