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Message-ID: <20201111023317.GB14896@b29397-desktop>
Date: Wed, 11 Nov 2020 02:33:46 +0000
From: Peter Chen <peter.chen@....com>
To: Pawel Laszczak <pawell@...ence.com>
CC: "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"balbi@...nel.org" <balbi@...nel.org>,
"colin.king@...onical.com" <colin.king@...onical.com>,
"rogerq@...com" <rogerq@...com>,
"kurahul@...ence.com" <kurahul@...ence.com>,
"nsekhar@...com" <nsekhar@...com>
Subject: Re: [PATCH v2 06/10] usb: cdnsp: Device side header file for CDNSP
driver
On 20-11-06 12:42:56, Pawel Laszczak wrote:
> Patch defines macros, registers and structures used by
> Device side driver.
>
> Because the size of main patch is very big, I’ve decided to create
> separate patch for cdnsp-gadget.h. It should simplify reviewing the code.
>
> Signed-off-by: Pawel Laszczak <pawell@...ence.com>
> ---
> drivers/usb/cdns3/cdnsp-gadget.h | 1463 ++++++++++++++++++++++++++++++
> 1 file changed, 1463 insertions(+)
> create mode 100644 drivers/usb/cdns3/cdnsp-gadget.h
>
> diff --git a/drivers/usb/cdns3/cdnsp-gadget.h b/drivers/usb/cdns3/cdnsp-gadget.h
> new file mode 100644
> index 000000000000..29d5e2d00879
> --- /dev/null
> +++ b/drivers/usb/cdns3/cdnsp-gadget.h
> @@ -0,0 +1,1463 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Cadence CDNSP DRD Driver.
> + *
> + * Copyright (C) 2020 Cadence.
> + *
> + * Author: Pawel Laszczak <pawell@...ence.com>
> + *
> + * Code based on Linux XHCI driver.
> + * Origin: Copyright (C) 2008 Intel Corp.
> + */
> +#ifndef __LINUX_CDNSP_GADGET_H
> +#define __LINUX_CDNSP_GADGET_H
> +
> +#include <linux/io-64-nonatomic-lo-hi.h>
> +#include <linux/usb/gadget.h>
> +#include <linux/irq.h>
> +
> +/* Max number slots - only 1 is allowed. */
> +#define CDNSP_DEV_MAX_SLOTS 1
> +
> +#define CDNSP_EP0_SETUP_SIZE 512
> +
> +/*16 for in and 16 for out. */
> +#define CDNSP_ENDPOINTS_NUM 32
> +
> +/* Best Effort Service Latency. */
> +#define CDNSP_DEFAULT_BESL 0
> +
> +/* Device Controller command default timeout value in us */
> +#define CDNSP_CMD_TIMEOUT (15 * 1000)
> +
> +/* Up to 16 ms to halt an device controller */
> +#define CDNSP_MAX_HALT_USEC (16 * 1000)
> +
> +#define CDNSP_CTX_SIZE 2112
> +
> +/*
> + * Controller register interface.
> + */
> +
> +/**
> + * struct cdnsp_cap_regs - CDNSP Registers.
> + * @hc_capbase: Length of the capabilities register and controller
> + * version number
> + * @hcs_params1: HCSPARAMS1 - Structural Parameters 1
> + * @hcs_params2: HCSPARAMS2 - Structural Parameters 2
> + * @hcs_params3: HCSPARAMS3 - Structural Parameters 3
> + * @hcc_params: HCCPARAMS - Capability Parameters
> + * @db_off: DBOFF - Doorbell array offset
> + * @run_regs_off: RTSOFF - Runtime register space offset
> + * @hcc_params2: HCCPARAMS2 Capability Parameters 2,
> + */
> +struct cdnsp_cap_regs {
> + __le32 hc_capbase;
> + __le32 hcs_params1;
> + __le32 hcs_params2;
> + __le32 hcs_params3;
> + __le32 hcc_params;
> + __le32 db_off;
> + __le32 run_regs_off;
> + __le32 hcc_params2;
> + /* Reserved up to (CAPLENGTH - 0x1C) */
> +};
> +
> +/* hc_capbase bitmasks. */
> +/* bits 7:0 - how long is the Capabilities register. */
> +#define HC_LENGTH(p) (((p) >> 00) & GENMASK(7, 0))
> +/* bits 31:16 */
> +#define HC_VERSION(p) (((p) >> 16) & GENMASK(15, 1))
> +
> +/* HCSPARAMS1 - hcs_params1 - bitmasks */
> +/* bits 0:7, Max Device Endpoints */
> +#define HCS_ENDPOINTS_MASK GENMASK(7, 0)
> +#define HCS_ENDPOINTS(p) (((p) & HCS_ENDPOINTS_MASK) >> 0)
> +
> +/* HCCPARAMS offset from PCI base address */
> +#define HCC_PARAMS_OFFSET 0x10
> +
> +/* HCCPARAMS - hcc_params - bitmasks */
> +/* true: device controller can use 64-bit address pointers. */
What does "true" mean at above comment?
> +#define HCC_64BIT_ADDR(p) ((p) & BIT(0))
> +/* true: device controller uses 64-byte Device Context structures. */
ditto
> +#define HCC_64BYTE_CONTEXT(p) ((p) & BIT(2))
> +/* Max size for Primary Stream Arrays - 2^(n+1), where n is bits 12:15. */
> +#define HCC_MAX_PSA(p) ((((p) >> 12) & 0xf) + 1)
> +/* Extended Capabilities pointer from PCI base. */
> +#define HCC_EXT_CAPS(p) (((p) & GENMASK(31, 16)) >> 16)
> +
> +#define CTX_SIZE(_hcc) (HCC_64BYTE_CONTEXT(_hcc) ? 64 : 32)
> +
> +/* db_off bitmask - bits 0:1 reserved. */
> +#define DBOFF_MASK GENMASK(31, 2)
> +
> +/* run_regs_off bitmask - bits 0:4 reserved. */
> +#define RTSOFF_MASK GENMASK(31, 5)
> +
> +/**
> + * struct cdnsp_op_regs - Device Controller Operational Registers.
> + * @command: USBCMD - Controller command register.
> + * @status: USBSTS - Controller status register.
> + * @page_size: This indicates the page size that the device controller supports.
> + * If bit n is set, the controller supports a page size of 2^(n+12),
> + * up to a 128MB page size. 4K is the minimum page size.
> + * @dnctrl: DNCTRL - Device notification control register.
> + * @cmd_ring: CRP - 64-bit Command Ring Pointer.
> + * @dcbaa_ptr: DCBAAP - 64-bit Device Context Base Address Array Pointer.
> + * @config_reg: CONFIG - Configure Register
> + * @port_reg_base: PORTSCn - base address for Port Status and Control
> + * Each port has a Port Status and Control register,
> + * followed by a Port Power Management Status and Control
> + * register, a Port Link Info register, and a reserved
> + * register.
> + */
> +struct cdnsp_op_regs {
> + __le32 command;
> + __le32 status;
> + __le32 page_size;
> + __le32 reserved1;
> + __le32 reserved2;
> + __le32 dnctrl;
> + __le64 cmd_ring;
> + /* rsvd: offset 0x20-2F. */
> + __le32 reserved3[4];
> + __le64 dcbaa_ptr;
> + __le32 config_reg;
> + /* rsvd: offset 0x3C-3FF. */
> + __le32 reserved4[241];
> + /* port 1 registers, which serve as a base address for other ports. */
> + __le32 port_reg_base;
> +};
> +
> +/* Number of registers per port. */
> +#define NUM_PORT_REGS 4
> +
> +/**
> + * struct cdnsp_port_regs - Port Registers.
> + * @portsc: PORTSC - Port Status and Control Register.
> + * @portpmsc: PORTPMSC - Port Power Managements Status and Control Register.
> + * @portli: PORTLI - Port Link Info register.
> + */
> +struct cdnsp_port_regs {
> + __le32 portsc;
> + __le32 portpmsc;
> + __le32 portli;
> + __le32 reserved;
> +};
> +
> +/*
> + * These bits are Read Only (RO) and should be saved and written to the
> + * registers: 0 (connect status) and 10:13 (port speed).
> + * These bits are also sticky - meaning they're in the AUX well and they aren't
> + * changed by a hot and warm.
> + */
> +#define CDNSP_PORT_RO (PORT_CONNECT | DEV_SPEED_MASK)
> +
> +/*
> + * These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit:
> + * bits 5:8 (link state), 25:26 ("wake on" enable state)
> + */
> +#define CDNSP_PORT_RWS (PORT_PLS_MASK | PORT_WKCONN_E | PORT_WKDISC_E)
> +
> +/*
> + * These bits are RW; writing a 1 clears the bit, writing a 0 has no effect:
> + * bits 1 (port enable/disable), 17 ( connect changed),
> + * 21 (port reset changed) , 22 (Port Link State Change),
> + */
> +#define CDNSP_PORT_RW1CS (PORT_PED | PORT_CSC | PORT_RC | PORT_PLC)
> +
> +/* USBCMD - USB command - bitmasks. */
> +/* Run/Stop, controller execution - do not write unless controller is halted.*/
> +#define CMD_R_S BIT(0)
> +/*
> + * Reset device controller - resets internal controller state machine and all
> + * registers (except PCI config regs).
> + */
> +#define CMD_RESET BIT(1)
> +/* Event Interrupt Enable - a '1' allows interrupts from the controller. */
> +#define CMD_INTE BIT(2)
> +/*
> + * Device System Error Interrupt Enable - get out-of-band signal for
> + * controller errors.
> + */
> +#define CMD_DSEIE BIT(3)
> +/* device controller save/restore state. */
> +#define CMD_CSS BIT(8)
> +#define CMD_CRS BIT(9)
> +/*
> + * Enable Wrap Event - '1' means device controller generates an event
> + * when MFINDEX wraps.
> + */
> +#define CMD_EWE BIT(10)
> +/*bit 13 CEM Enable (CME) */
Unless code?
> +#define CMD_DEVEN BIT(17)
> +/* bits 16:31 are reserved (and should be preserved on writes). */
> +
> +/* Command register values to disable interrupts. */
> +#define CDNSP_IRQS (CMD_INTE | CMD_DSEIE | CMD_EWE)
> +
> +/* USBSTS - USB status - bitmasks */
> +/* controller not running - set to 1 when run/stop bit is cleared. */
> +#define STS_HALT BIT(0)
> +/*
> + * serious error, e.g. PCI parity error. The controller will clear
> + * the run/stop bit.
> + */
> +#define STS_FATAL BIT(2)
> +/* event interrupt - clear this prior to clearing any IP flags in IR set.*/
> +#define STS_EINT BIT(3)
> +/* port change detect */
> +#define STS_PCD BIT(4)
> +/* save state status - '1' means device controller is saving state. */
> +#define STS_SSS BIT(8)
> +/* restore state status - '1' means controllers is restoring state. */
> +#define STS_RSS BIT(9)
> +/* true: save or restore error */
> +#define STS_SRE BIT(10)
> +/* true: device Not Ready to accept doorbell or op reg writes after reset. */
> +#define STS_CNR BIT(11)
> +/* true: internal Device Controller Error.*/
> +#define STS_HCE BIT(12)
> +
> +/* CRCR - Command Ring Control Register - cmd_ring bitmasks. */
> +/* bit 0 is the command ring cycle state. */
> +#define CMD_RING_CS BIT(0)
> +/* stop ring immediately - abort the currently executing command. */
> +#define CMD_RING_ABORT BIT(2)
> +/*
> + * Command Ring Busy.
> + * Set when Doorbell register is written with DB for command and cleared when
> + * the controller reached end of CR.
> + */
> +#define CMD_RING_BUSY(p) ((p) & BIT(4))
> +/* true: command ring is running */
> +#define CMD_RING_RUNNING BIT(3)
> +/* Command Ring pointer - bit mask for the lower 32 bits. */
> +#define CMD_RING_RSVD_BITS GENMASK(5, 0)
> +
> +/* CONFIG - Configure Register - config_reg bitmasks. */
> +/* bits 0:7 - maximum number of device slots enabled. */
> +#define MAX_DEVS GENMASK(7, 0)
> +/* bit 8: U3 Entry Enabled, assert PLC when controller enters U3. */
> +#define CONFIG_U3E BIT(8)
> +
> +/* PORTSC - Port Status and Control Register - port_reg_base bitmasks */
> +/* true: device connected. */
> +#define PORT_CONNECT BIT(0)
> +/* true: port enabled. */
> +#define PORT_PED BIT(1)
> +/* true: port reset signaling asserted. */
> +#define PORT_RESET BIT(4)
> +/*
> + * Port Link State - bits 5:8
> + * A read gives the current link PM state of the port,
> + * a write with Link State Write Strobe set sets the link state.
Duplicate "set"
> + */
> +#define PORT_PLS_MASK GENMASK(8, 5)
> +#define XDEV_U0 (0x0 << 5)
> +#define XDEV_U1 (0x1 << 5)
> +#define XDEV_U2 (0x2 << 5)
> +#define XDEV_U3 (0x3 << 5)
> +#define XDEV_DISABLED (0x4 << 5)
> +#define XDEV_RXDETECT (0x5 << 5)
> +#define XDEV_INACTIVE (0x6 << 5)
> +#define XDEV_POLLING (0x7 << 5)
> +#define XDEV_RECOVERY (0x8 << 5)
> +#define XDEV_HOT_RESET (0x9 << 5)
> +#define XDEV_COMP_MODE (0xa << 5)
> +#define XDEV_TEST_MODE (0xb << 5)
> +#define XDEV_RESUME (0xf << 5)
> +/* true: port has power. */
ditto
> +#define PORT_POWER BIT(9)
> +/*
> + * bits 10:13 indicate device speed:
> + * 0 - undefined speed - port hasn't be initialized by a reset yet
> + * 1 - full speed
> + * 2 - Reserved (Low Speed not supported
> + * 3 - high speed
> + * 4 - super speed
> + * 5 - super speed
> + * 6-15 reserved
> + */
> +#define DEV_SPEED_MASK GENMASK(13, 10)
> +#define XDEV_FS (0x1 << 10)
> +#define XDEV_HS (0x3 << 10)
> +#define XDEV_SS (0x4 << 10)
> +#define XDEV_SSP (0x5 << 10)
> +#define DEV_UNDEFSPEED(p) (((p) & DEV_SPEED_MASK) == (0x0 << 10))
> +#define DEV_FULLSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_FS)
> +#define DEV_HIGHSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_HS)
> +#define DEV_SUPERSPEED(p) (((p) & DEV_SPEED_MASK) == XDEV_SS)
> +#define DEV_SUPERSPEEDPLUS(p) (((p) & DEV_SPEED_MASK) == XDEV_SSP)
> +#define DEV_SUPERSPEED_ANY(p) (((p) & DEV_SPEED_MASK) >= XDEV_SS)
> +#define DEV_PORT_SPEED(p) (((p) >> 10) & 0x0f)
> +/* Port Link State Write Strobe - set this when changing link state */
> +#define PORT_LINK_STROBE BIT(16)
> +/* true: connect status change */
> +#define PORT_CSC BIT(17)
> +/* true: warm reset for a USB 3.0 device is done. */
> +#define PORT_WRC BIT(19)
> +/* true: reset change - 1 to 0 transition of PORT_RESET */
> +#define PORT_RC BIT(21)
> +/*
> + * port link status change - set on some port link state transitions:
> + * Transition Reason
> + * ----------------------------------------------------------------------------
> + * - U3 to Resume Wakeup signaling from a device
> + * - Resume to Recovery to U0 USB 3.0 device resume
> + * - Resume to U0 USB 2.0 device resume
> + * - U3 to Recovery to U0 Software resume of USB 3.0 device complete
> + * - U3 to U0 Software resume of USB 2.0 device complete
> + * - U2 to U0 L1 resume of USB 2.1 device complete
> + * - U0 to U0 L1 entry rejection by USB 2.1 device
> + * - U0 to disabled L1 entry error with USB 2.1 device
> + * - Any state to inactive Error on USB 3.0 port
> + */
> +#define PORT_PLC BIT(22)
> +/* Port configure error change - port failed to configure its link partner. */
> +#define PORT_CEC BIT(23)
> +/* Wake on connect (enable). */
> +#define PORT_WKCONN_E BIT(25)
> +/* Wake on disconnect (enable). */
> +#define PORT_WKDISC_E BIT(26)
> +/* Indicates if Warm Reset is being received. */
> +#define PORT_WR BIT(31)
> +
> +#define PORT_CHANGE_BITS (PORT_CSC | PORT_WRC | PORT_RC | PORT_PLC | PORT_CEC)
> +
> +/* PORTPMSCUSB3 - Port Power Management Status and Control - bitmasks. */
> +/* Enables U1 entry. */
> +#define PORT_U1_TIMEOUT_MASK GENMASK(7, 0)
> +#define PORT_U1_TIMEOUT(p) ((p) & PORT_U1_TIMEOUT_MASK)
> +/* Enables U2 entry .*/
> +#define PORT_U2_TIMEOUT_MASK GENMASK(14, 8)
> +#define PORT_U2_TIMEOUT(p) (((p) << 8) & PORT_U2_TIMEOUT_MASK)
> +
> +/* PORTPMSCUSB2 - Port Power Management Status and Control - bitmasks. */
> +#define PORT_L1S_MASK GENMASK(2, 0)
> +#define PORT_L1S(p) ((p) & PORT_L1S_MASK)
> +#define PORT_L1S_ACK PORT_L1S(1)
> +#define PORT_L1S_NYET PORT_L1S(2)
> +#define PORT_L1S_STALL PORT_L1S(3)
> +#define PORT_L1S_TIMEOUT PORT_L1S(4)
> +/* Remote Wake Enable. */
> +#define PORT_RWE BIT(3)
> +/* Best Effort Service Latency (BESL). */
> +#define PORT_BESL(p) (((p) << 4) & GENMASK(7, 4))
> +/* Hardware LPM Enable (HLE). */
> +#define PORT_HLE BIT(16)
> +/* Received Best Effort Service Latency (BESL). */
> +#define PORT_RRBESL(p) (((p) & GENMASK(20, 17)) >> 17)
> +/* Port Test Control. */
> +#define PORT_TEST_MODE_MASK GENMASK(31, 28)
> +#define PORT_TEST_MODE(p) (((p) << 28) & PORT_TEST_MODE_MASK)
> +
> +/**
> + * struct cdnsp_intr_reg - Interrupt Register Set.
> + * @irq_pending: IMAN - Interrupt Management Register. Used to enable
> + * interrupts and check for pending interrupts.
> + * @irq_control: IMOD - Interrupt Moderation Register.
> + * Used to throttle interrupts.
> + * @erst_size: Number of segments in the Event Ring Segment Table (ERST).
> + * @erst_base: ERST base address.
> + * @erst_dequeue: Event ring dequeue pointer.
> + *
> + * Each interrupter (defined by a MSI-X vector) has an event ring and an Event
> + * Ring Segment Table (ERST) associated with it. The event ring is comprised of
> + * multiple segments of the same size. The controller places events on the ring
> + * and "updates the Cycle bit in the TRBs to indicate to software the current
> + * position of the Enqueue Pointer." The driver processes those events and
> + * updates the dequeue pointer.
> + */
> +struct cdnsp_intr_reg {
> + __le32 irq_pending;
> + __le32 irq_control;
> + __le32 erst_size;
> + __le32 rsvd;
> + __le64 erst_base;
> + __le64 erst_dequeue;
> +};
> +
> +/* IMAN - Interrupt Management Register - irq_pending bitmasks l. */
> +#define IMAN_IE BIT(1)
> +#define IMAN_IP BIT(0)
> +/* bits 2:31 need to be preserved */
> +#define IMAN_IE_SET(p) (((p) & IMAN_IE) | 0x2)
> +#define IMAN_IE_CLEAR(p) (((p) & IMAN_IE) & ~(0x2))
> +
> +/* IMOD - Interrupter Moderation Register - irq_control bitmasks. */
> +/*
> + * 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 IMOD_INTERVAL_MASK GENMASK(15, 0)
> +/* Counter used to count down the time to the next interrupt - HW use only */
> +#define IMOD_COUNTER_MASK GENMASK(31, 16)
> +#define IMOD_DEFAULT_INTERVAL 0
> +
> +/* erst_size bitmasks. */
> +/* Preserve bits 16:31 of erst_size. */
> +#define ERST_SIZE_MASK GENMASK(31, 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 GENMASK(2, 0)
> +/* Event Handler Busy (EHB) - is the event ring scheduled to be serviced. */
> +#define ERST_EHB BIT(3)
> +#define ERST_PTR_MASK GENMASK(3, 0)
> +
> +/**
> + * struct cdnsp_run_regs
> + * @microframe_index: MFINDEX - current microframe number.
> + * @ir_set: Array of Interrupter registers.
> + *
> + * Device Controller Runtime Registers:
> + * "Software should read and write these registers using only Dword (32 bit)
> + * or larger accesses"
> + */
> +struct cdnsp_run_regs {
> + __le32 microframe_index;
> + __le32 rsvd[7];
> + struct cdnsp_intr_reg ir_set[128];
> +};
> +
> +/**
> + * USB2.0 Port Peripheral Configuration Registers.
> + * @ext_cap: Header register for Extended Capability.
> + * @port_reg1: Timer Configuration Register.
> + * @port_reg2: Timer Configuration Register.
> + * @port_reg3: Timer Configuration Register.
> + * @port_reg4: Timer Configuration Register.
> + * @port_reg5: Timer Configuration Register.
> + * @port_reg6: Chicken bits for USB20PPP.
> + */
> +struct cdnsp_20port_cap {
> + __le32 ext_cap;
> + __le32 port_reg1;
> + __le32 port_reg2;
> + __le32 port_reg3;
> + __le32 port_reg4;
> + __le32 port_reg5;
> + __le32 port_reg6;
> +};
> +
> +/* Extended capability register fields */
> +#define EXT_CAPS_ID(p) (((p) >> 0) & GENMASK(7, 0))
> +#define EXT_CAPS_NEXT(p) (((p) >> 8) & GENMASK(7, 0))
> +/* Extended capability IDs - ID 0 reserved */
> +#define EXT_CAPS_PROTOCOL 2
> +
> +/* USB 2.0 Port Peripheral Configuration Extended Capability */
> +#define EXT_CAP_CFG_DEV_20PORT_CAP_ID 0xC1
> +/*
> + * Setting this bit to '1' enables automatic wakeup from L1 state on transfer
> + * TRB prepared when USBSSP operates in USB2.0 mode.
> + */
> +#define PORT_REG6_L1_L0_HW_EN BIT(1)
> +/*
> + * Setting this bit to '1' forces Full Speed when USBSSP operates in USB2.0
> + * mode (disables High Speed).
> + */
> +#define PORT_REG6_FORCE_FS BIT(0)
> +
> +/**
> + * USB3.x Port Peripheral Configuration Registers.
> + * @ext_cap: Header register for Extended Capability.
> + * @mode_addr: Miscellaneous 3xPORT operation mode configuration register.
> + * @mode_2: 3x Port Control Register 2.
> + */
> +struct cdnsp_3xport_cap {
> + __le32 ext_cap;
> + __le32 mode_addr;
> + __le32 reserved[52];
> + __le32 mode_2;
> +};
> +
> +/* Extended Capability Header for 3XPort Configuration Registers. */
> +#define D_XEC_CFG_3XPORT_CAP 0xC0
> +#define CFG_3XPORT_SSP_SUPPORT BIT(31)
> +#define CFG_3XPORT_U1_PIPE_CLK_GATE_EN BIT(0)
> +
> +/* Revision Extended Capability ID */
> +#define RTL_REV_CAP 0xC4
> +#define RTL_REV_CAP_RX_BUFF_CMD_SIZE BITMASK(31, 24)
> +#define RTL_REV_CAP_RX_BUFF_SIZE BITMASK(15, 0)
> +#define RTL_REV_CAP_TX_BUFF_CMD_SIZE BITMASK(31, 24)
> +#define RTL_REV_CAP_TX_BUFF_SIZE BITMASK(15, 0)
> +
> +#define CDNSP_VER_1 0x00000000
> +#define CDNSP_VER_2 0x10000000
> +
> +#define CDNSP_IF_EP_EXIST(pdev, ep_num, dir) ((pdev)->rev_cap.ep_supported & \
> + (BIT(ep_num) << ((dir) ? 0 : 16)))
> +
> +/**
> + * struct cdnsp_rev_cap - controller capabilities .
> + * @ext_cap: Header for RTL Revision Extended Capability.
> + * @rtl_revision: RTL revision.
> + * @rx_buff_size: Rx buffer sizes.
> + * @tx_buff_size: Tx buffer sizes.
> + * @ep_supported: Supported endpoints.
> + * @ctrl_revision: Controller revision ID.
> + */
> +struct cdnsp_rev_cap {
> + __le32 ext_cap;
> + __le32 rtl_revision;
> + __le32 rx_buff_size;
> + __le32 tx_buff_size;
> + __le32 ep_supported;
> + __le32 ctrl_revision;
> +};
> +
> +/* USB2.0 Port Peripheral Configuration Registers. */
> +#define D_XEC_PRE_REGS_CAP 0xC8
> +#define REG_CHICKEN_BITS_2_OFFSET 0x48
> +#define CHICKEN_XDMA_2_TP_CACHE_DIS BIT(28)
> +
> +/* XBUF Extended Capability ID. */
> +#define XBUF_CAP_ID 0xCB
> +#define XBUF_RX_TAG_MASK_0_OFFSET 0x1C
> +#define XBUF_RX_TAG_MASK_1_OFFSET 0x24
> +#define XBUF_TX_CMD_OFFSET 0x2C
> +
> +/**
> + * struct cdnsp_doorbell_array.
> + * @cmd_db: Command ring doorbell register.
> + * @ep_db: Endpoint ring doorbell register.
> + * Bits 0 - 7: Endpoint target.
> + * Bits 8 - 15: RsvdZ.
> + * Bits 16 - 31: Stream ID.
> + */
> +struct cdnsp_doorbell_array {
> + __le32 cmd_db;
> + __le32 ep_db;
> +};
> +
> +#define DB_VALUE(ep, stream) ((((ep) + 1) & 0xff) | ((stream) << 16))
> +#define DB_VALUE_EP0_OUT(ep, stream) ((ep) & 0xff)
> +#define DB_VALUE_CMD 0x00000000
> +
> +/**
> + * struct cdnsp_container_ctx.
> + * @type: Type of context. Used to calculated offsets to contained contexts.
> + * @size: Size of the context data.
> + * @ctx_size: context data structure size - 64 or 32 bits.
> + * @dma: dma address of the bytes.
> + * @bytes: The raw context data given to HW.
> + *
> + * 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 cdnsp_container_ctx {
> + unsigned int type;
> +#define CDNSP_CTX_TYPE_DEVICE 0x1
> +#define CDNSP_CTX_TYPE_INPUT 0x2
> + int size;
> + int ctx_size;
> + dma_addr_t dma;
> + u8 *bytes;
> +};
> +
> +/**
> + * struct cdnsp_slot_ctx
> + * @dev_info: Device speed, and last valid endpoint.
> + * @dev_port: Device port number that is needed to access the USB device.
> + * @int_target: Interrupter target number.
> + * @dev_state: Slot state and device address.
> + *
> + * Slot Context - This assumes the controller uses 32-byte context
> + * structures. If the controller uses 64-byte contexts, there is an additional
> + * 32 bytes reserved at the end of the slot context for controller internal use.
> + */
> +struct cdnsp_slot_ctx {
> + __le32 dev_info;
> + __le32 dev_port;
> + __le32 int_target;
> + __le32 dev_state;
> + /* offset 0x10 to 0x1f reserved for controller internal use. */
> + __le32 reserved[4];
> +};
> +
> +/* Bits 20:23 in the Slot Context are the speed for the device. */
> +#define SLOT_SPEED_FS (XDEV_FS << 10)
> +#define SLOT_SPEED_HS (XDEV_HS << 10)
> +#define SLOT_SPEED_SS (XDEV_SS << 10)
> +#define SLOT_SPEED_SSP (XDEV_SSP << 10)
> +
> +/* dev_info bitmasks. */
> +/* Device speed - values defined by PORTSC Device Speed field - 20:23. */
> +#define DEV_SPEED GENMASK(23, 20)
> +#define GET_DEV_SPEED(n) (((n) & DEV_SPEED) >> 20)
> +/* Index of the last valid endpoint context in this device context - 27:31. */
> +#define LAST_CTX_MASK GENMASK(31, 27)
> +#define LAST_CTX(p) ((p) << 27)
> +#define LAST_CTX_TO_EP_NUM(p) (((p) >> 27) - 1)
> +#define SLOT_FLAG BIT(0)
> +#define EP0_FLAG BIT(1)
> +
> +/* dev_port bitmasks */
> +/* Device port number that is needed to access the USB device. */
> +#define DEV_PORT(p) (((p) & 0xff) << 16)
> +
> +/* dev_state bitmasks */
> +/* USB device address - assigned by the controller. */
> +#define DEV_ADDR_MASK GENMASK(7, 0)
> +/* Slot state */
> +#define SLOT_STATE GENMASK(31, 27)
> +#define GET_SLOT_STATE(p) (((p) & SLOT_STATE) >> 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 cdnsp_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 controller 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 - This assumes the controller uses 32-byte context
> + * structures. If the controller uses 64-byte contexts, there is an additional
> + * 32 bytes reserved at the end of the endpoint context for controller internal
> + * use.
> + */
> +struct cdnsp_ep_ctx {
> + __le32 ep_info;
> + __le32 ep_info2;
> + __le64 deq;
> + __le32 tx_info;
> + /* offset 0x14 - 0x1f reserved for controller internal use. */
> + __le32 reserved[3];
> +};
> +
> +/* ep_info bitmasks. */
> +/*
> + * Endpoint State - bits 0:2:
> + * 0 - disabled
> + * 1 - running
> + * 2 - halted due to halt condition
> + * 3 - stopped
> + * 4 - TRB error
> + * 5-7 - reserved
> + */
> +#define EP_STATE_MASK GENMASK(3, 0)
> +#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
> +#define GET_EP_CTX_STATE(ctx) (le32_to_cpu((ctx)->ep_info) & EP_STATE_MASK)
> +
> +/* Mult - Max number of burst within an interval, in EP companion desc. */
> +#define EP_MULT(p) (((p) << 8) & GENMASK(9, 8))
> +#define CTX_TO_EP_MULT(p) (((p) & GENMASK(9, 8)) >> 8)
> +/* 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) << 16) & GENMASK(23, 16))
> +#define EP_INTERVAL_TO_UFRAMES(p) (1 << (((p) & GENMASK(23, 16)) >> 16))
> +#define CTX_TO_EP_INTERVAL(p) (((p) & GENMASK(23, 16)) >> 16)
> +#define EP_MAXPSTREAMS_MASK GENMASK(14, 10)
> +#define EP_MAXPSTREAMS(p) (((p) << 10) & EP_MAXPSTREAMS_MASK)
> +#define CTX_TO_EP_MAXPSTREAMS(p) (((p) & EP_MAXPSTREAMS_MASK) >> 10)
> +/* Endpoint is set up with a Linear Stream Array (vs. Secondary Stream Array) */
> +#define EP_HAS_LSA BIT(15)
> +
> +/* ep_info2 bitmasks */
> +#define ERROR_COUNT(p) (((p) & 0x3) << 1)
> +#define CTX_TO_EP_TYPE(p) (((p) >> 3) & 0x7)
> +#define EP_TYPE(p) ((p) << 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 Device Initiate Disable - for disabling stream selection. */
> +#define MAX_BURST(p) (((p) << 8) & GENMASK(15, 8))
> +#define CTX_TO_MAX_BURST(p) (((p) & GENMASK(15, 8)) >> 8)
> +#define MAX_PACKET(p) (((p) << 16) & GENMASK(31, 16))
> +#define MAX_PACKET_MASK GENMASK(31, 16)
> +#define MAX_PACKET_DECODED(p) (((p) & GENMASK(31, 16)) >> 16)
> +
> +/* tx_info bitmasks. */
> +#define EP_AVG_TRB_LENGTH(p) ((p) & GENMASK(15, 0))
> +#define EP_MAX_ESIT_PAYLOAD_LO(p) (((p) << 16) & GENMASK(31, 16))
> +#define EP_MAX_ESIT_PAYLOAD_HI(p) ((((p) & GENMASK(23, 16)) >> 16) << 24)
> +#define CTX_TO_MAX_ESIT_PAYLOAD_LO(p) (((p) & GENMASK(31, 16)) >> 16)
> +#define CTX_TO_MAX_ESIT_PAYLOAD_HI(p) (((p) & GENMASK(31, 24)) >> 24)
> +
> +/* deq bitmasks. */
> +#define EP_CTX_CYCLE_MASK BIT(0)
> +#define CTX_DEQ_MASK (~0xfL)
> +
> +/**
> + * struct cdnsp_input_control_context
> + * Input control context;
> + *
> + * @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 cdnsp_input_control_ctx {
> + __le32 drop_flags;
> + __le32 add_flags;
> + __le32 rsvd2[6];
> +};
> +
> +/**
> + * Represents everything that is needed to issue a command on the command ring.
> + *
> + * @in_ctx: Pointer to input context structure.
> + * @status: Command Completion Code for last command.
> + * @command_trb: Pointer to command TRB.
> + */
> +struct cdnsp_command {
> + /* Input context for changing device state. */
> + struct cdnsp_container_ctx *in_ctx;
> + u32 status;
> + union cdnsp_trb *command_trb;
> +};
> +
> +/**
> + * Stream context structure.
> + *
> + * @stream_ring: 64-bit stream ring address, cycle state, and stream type.
> + * @reserved: offset 0x14 - 0x1f reserved for controller internal use.
> + */
> +struct cdnsp_stream_ctx {
> + __le64 stream_ring;
> + __le32 reserved[2];
> +};
> +
> +/* Stream Context Types - bits 3:1 of stream ctx deq ptr. */
> +#define SCT_FOR_CTX(p) (((p) << 1) & GENMASK(3, 1))
> +/* Secondary stream array type, dequeue pointer is to a transfer ring. */
> +#define SCT_SEC_TR 0
> +/* Primary stream array type, dequeue pointer is to a transfer ring. */
> +#define SCT_PRI_TR 1
> +
> +/**
> + * struct cdnsp_stream_info: Representing everything that is needed to
> + * supports stream capable endpoints.
> + * @stream_rings: Array of pointers containing Transfer rings for all
> + * supported streams.
> + * @num_streams: Number of streams, including stream 0.
> + * @stream_ctx_array: The stream context array may be bigger than the number
> + * of streams the driver asked for.
> + * @num_stream_ctxs: Number of streams.
> + * @ctx_array_dma: Dma address of Context Stream Array.
> + * @trb_address_map: For mapping physical TRB addresses to segments in
> + * stream rings.
> + * @td_count: Number of TDs associated with endpoint.
> + * @first_prime_det: First PRIME packet detected.
> + * @drbls_count: Number of allowed doorbells.
> + */
> +struct cdnsp_stream_info {
> + struct cdnsp_ring **stream_rings;
> + unsigned int num_streams;
> + struct cdnsp_stream_ctx *stream_ctx_array;
> + unsigned int num_stream_ctxs;
> + dma_addr_t ctx_array_dma;
> + struct radix_tree_root trb_address_map;
> + int td_count;
> + u8 first_prime_det;
> +#define STREAM_DRBL_FIFO_DEPTH 2
> + u8 drbls_count;
> +};
> +
> +#define STREAM_LOG_STREAMS 4
> +#define STREAM_NUM_STREAMS BIT(STREAM_LOG_STREAMS)
> +
> +#if STREAM_LOG_STREAMS > 16 && STREAM_LOG_STREAMS < 1
> +#error "Not suupported stream value"
> +#endif
> +
> +/**
> + * struct cdnsp_ep - extended device side representation of USB endpoint.
> + * @endpoint: usb endpoint
> + * @pending_req_list: List of requests queuing on transfer ring.
> + * @pdev: Device associated with this endpoint.
> + * @number: Endpoint number (1 - 15).
> + * idx: The device context index (DCI).
> + * interval: Interval between packets used for ISOC endpoint.
> + * @name: A human readable name e.g. ep1out.
> + * @direction: Endpoint direction.
> + * @buffering: Number of on-chip buffers related to endpoint.
> + * @buffering_period; Number of on-chip buffers related to periodic endpoint.
> + * @in_ctx: Pointer to input endpoint context structure.
> + * @out_ctx: Pointer to output endpoint context structure.
> + * @ring: Pointer to transfer ring.
> + * @stream_info: Hold stream information.
> + * @ep_state: Current state of endpoint.
> + * skip: Sometimes the controller can not process isochronous endpoint ring
add "@"
Peter
> + * quickly enough, and it will miss some isoc tds on the ring and
> + * generate Missed Service Error Event.
> + * Set skip flag when receive a Missed Service Error Event and
> + * process the missed tds on the endpoint ring.
> + */
> +struct cdnsp_ep {
> + struct usb_ep endpoint;
> + struct list_head pending_list;
> + struct cdnsp_device *pdev;
> + u8 number;
> + u8 idx;
> + u32 interval;
> + char name[20];
> + u8 direction;
> + u8 buffering;
> + u8 buffering_period;
> + struct cdnsp_ep_ctx *in_ctx;
> + struct cdnsp_ep_ctx *out_ctx;
> + struct cdnsp_ring *ring;
> + struct cdnsp_stream_info stream_info;
> + unsigned int ep_state;
> +#define EP_ENABLED BIT(0)
> +#define EP_DIS_IN_RROGRESS BIT(1)
> +#define EP_HALTED BIT(2)
> +#define EP_STOPPED BIT(3)
> +#define EP_WEDGE BIT(4)
> +#define EP0_HALTED_STATUS BIT(5)
> +#define EP_HAS_STREAMS BIT(6)
> +
> + bool skip;
> +};
> +
> +/**
> + * struct cdnsp_device_context_array
> + * @dev_context_ptr: Array of 64-bit DMA addresses for device contexts.
> + * @dma: DMA address for device contexts structure.
> + */
> +struct cdnsp_device_context_array {
> + __le64 dev_context_ptrs[CDNSP_DEV_MAX_SLOTS + 1];
> + dma_addr_t dma;
> +};
> +
> +/**
> + * struct cdnsp_transfer_event.
> + * @buffer: 64-bit buffer address, or immediate data.
> + * @transfer_len: Data length transferred.
> + * @flags: Field is interpreted differently based on the type of TRB.
> + */
> +struct cdnsp_transfer_event {
> + __le64 buffer;
> + __le32 transfer_len;
> + __le32 flags;
> +};
> +
> +/* Invalidate event after disabling endpoint. */
> +#define TRB_EVENT_INVALIDATE 8
> +
> +/* Transfer event TRB length bit mask. */
> +/* bits 0:23 */
> +#define EVENT_TRB_LEN(p) ((p) & GENMASK(23, 0))
> +/* Completion Code - only applicable for some types of TRBs */
> +#define COMP_CODE_MASK (0xff << 24)
> +#define GET_COMP_CODE(p) (((p) & COMP_CODE_MASK) >> 24)
> +#define COMP_INVALID 0
> +#define COMP_SUCCESS 1
> +#define COMP_DATA_BUFFER_ERROR 2
> +#define COMP_BABBLE_DETECTED_ERROR 3
> +#define COMP_TRB_ERROR 5
> +#define COMP_RESOURCE_ERROR 7
> +#define COMP_NO_SLOTS_AVAILABLE_ERROR 9
> +#define COMP_INVALID_STREAM_TYPE_ERROR 10
> +#define COMP_SLOT_NOT_ENABLED_ERROR 11
> +#define COMP_ENDPOINT_NOT_ENABLED_ERROR 12
> +#define COMP_SHORT_PACKET 13
> +#define COMP_RING_UNDERRUN 14
> +#define COMP_RING_OVERRUN 15
> +#define COMP_VF_EVENT_RING_FULL_ERROR 16
> +#define COMP_PARAMETER_ERROR 17
> +#define COMP_CONTEXT_STATE_ERROR 19
> +#define COMP_EVENT_RING_FULL_ERROR 21
> +#define COMP_INCOMPATIBLE_DEVICE_ERROR 22
> +#define COMP_MISSED_SERVICE_ERROR 23
> +#define COMP_COMMAND_RING_STOPPED 24
> +#define COMP_COMMAND_ABORTED 25
> +#define COMP_STOPPED 26
> +#define COMP_STOPPED_LENGTH_INVALID 27
> +#define COMP_STOPPED_SHORT_PACKET 28
> +#define COMP_MAX_EXIT_LATENCY_TOO_LARGE_ERROR 29
> +#define COMP_ISOCH_BUFFER_OVERRUN 31
> +#define COMP_EVENT_LOST_ERROR 32
> +#define COMP_UNDEFINED_ERROR 33
> +#define COMP_INVALID_STREAM_ID_ERROR 34
> +
> +/*Transfer Event NRDY bit fields */
> +#define TRB_TO_DEV_STREAM(p) ((p) & GENMASK(16, 0))
> +#define TRB_TO_HOST_STREAM(p) ((p) & GENMASK(16, 0))
> +#define STREAM_PRIME_ACK 0xFFFE
> +#define STREAM_REJECTED 0xFFFF
> +
> +/** Transfer Event bit fields **/
> +#define TRB_TO_EP_ID(p) (((p) & GENMASK(20, 16)) >> 16)
> +
> +/**
> + * struct cdnsp_link_trb
> + * @segment_ptr: 64-bit segment pointer.
> + * @intr_target: Interrupter target.
> + * @control: Flags.
> + */
> +struct cdnsp_link_trb {
> + __le64 segment_ptr;
> + __le32 intr_target;
> + __le32 control;
> +};
> +
> +/* control bitfields */
> +#define LINK_TOGGLE BIT(1)
> +
> +/**
> + * struct cdnsp_event_cmd - Command completion event TRB.
> + * cmd_trb: Pointer to command TRB, or the value passed by the event data trb
> + * status: Command completion parameters and error code.
> + * flags: Flags.
> + */
> +struct cdnsp_event_cmd {
> + __le64 cmd_trb;
> + __le32 status;
> + __le32 flags;
> +};
> +
> +/* flags bitmasks */
> +
> +/* Address device - disable SetAddress. */
> +#define TRB_BSR BIT(9)
> +
> +/* Configure Endpoint - Deconfigure. */
> +#define TRB_DC BIT(9)
> +
> +/* Force Header */
> +#define TRB_FH_TO_PACKET_TYPE(p) ((p) & GENMASK(4, 0))
> +#define TRB_FH_TR_PACKET 0x4
> +#define TRB_FH_TO_DEVICE_ADDRESS(p) (((p) << 25) & GENMASK(31, 25))
> +#define TRB_FH_TR_PACKET_DEV_NOT 0x6
> +#define TRB_FH_TO_NOT_TYPE(p) (((p) << 4) & GENMASK(7, 4))
> +#define TRB_FH_TR_PACKET_FUNCTION_WAKE 0x1
> +#define TRB_FH_TO_INTERFACE(p) (((p) << 8) & GENMASK(15, 8))
> +
> +enum cdnsp_setup_dev {
> + SETUP_CONTEXT_ONLY,
> + SETUP_CONTEXT_ADDRESS,
> +};
> +
> +/* bits 24:31 are the slot ID. */
> +#define TRB_TO_SLOT_ID(p) (((p) & GENMASK(31, 24)) >> 24)
> +#define SLOT_ID_FOR_TRB(p) (((p) << 24) & GENMASK(31, 24))
> +
> +/* Stop Endpoint TRB - ep_index to endpoint ID for this TRB. */
> +#define TRB_TO_EP_INDEX(p) (((p) >> 16) & 0x1f)
> +
> +#define EP_ID_FOR_TRB(p) ((((p) + 1) << 16) & GENMASK(20, 16))
> +
> +#define SUSPEND_PORT_FOR_TRB(p) (((p) & 1) << 23)
> +#define TRB_TO_SUSPEND_PORT(p) (((p) >> 23) & 0x1)
> +#define LAST_EP_INDEX 30
> +
> +/* Set TR Dequeue Pointer command TRB fields. */
> +#define TRB_TO_STREAM_ID(p) ((((p) & GENMASK(31, 16)) >> 16))
> +#define STREAM_ID_FOR_TRB(p) ((((p)) << 16) & GENMASK(31, 16))
> +#define SCT_FOR_TRB(p) (((p) << 1) & 0x7)
> +
> +/* Link TRB specific fields. */
> +#define TRB_TC BIT(1)
> +
> +/* Port Status Change Event TRB fields. */
> +/* Port ID - bits 31:24. */
> +#define GET_PORT_ID(p) (((p) & GENMASK(31, 24)) >> 24)
> +#define SET_PORT_ID(p) (((p) << 24) & GENMASK(31, 24))
> +#define EVENT_DATA BIT(2)
> +
> +/* Normal TRB fields. */
> +/* transfer_len bitmasks - bits 0:16. */
> +#define TRB_LEN(p) ((p) & GENMASK(16, 0))
> +/* TD Size, packets remaining in this TD, bits 21:17 (5 bits, so max 31). */
> +#define TRB_TD_SIZE(p) (min((p), (u32)31) << 17)
> +#define GET_TD_SIZE(p) (((p) & GENMASK(21, 17)) >> 17)
> +/*
> + * Controller uses the TD_SIZE field for TBC if Extended TBC
> + * is enabled (ETE).
> + */
> +#define TRB_TD_SIZE_TBC(p) (min((p), (u32)31) << 17)
> +/* Interrupter Target - which MSI-X vector to target the completion event at. */
> +#define TRB_INTR_TARGET(p) (((p) << 22) & GENMASK(31, 22))
> +#define GET_INTR_TARGET(p) (((p) & GENMASK(31, 22)) >> 22)
> +/*
> + * Total burst count field, Rsvdz on controller with Extended TBC
> + * enabled (ETE).
> + */
> +#define TRB_TBC(p) (((p) & 0x3) << 7)
> +#define TRB_TLBPC(p) (((p) & 0xf) << 16)
> +
> +/* Cycle bit - indicates TRB ownership by driver or driver.*/
> +#define TRB_CYCLE BIT(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 BIT(1)
> +/* Interrupt on short packet. */
> +#define TRB_ISP BIT(2)
> +/* Set PCIe no snoop attribute. */
> +#define TRB_NO_SNOOP BIT(3)
> +/* Chain multiple TRBs into a TD. */
> +#define TRB_CHAIN BIT(4)
> +/* Interrupt on completion. */
> +#define TRB_IOC BIT(5)
> +/* The buffer pointer contains immediate data. */
> +#define TRB_IDT BIT(6)
> +/* 0 - NRDY during data stage, 1 - NRDY during status stage (only control). */
> +#define TRB_STAT BIT(7)
> +/* Block Event Interrupt. */
> +#define TRB_BEI BIT(9)
> +
> +/* Control transfer TRB specific fields. */
> +#define TRB_DIR_IN BIT(16)
> +
> +/* TRB bit mask in Data Stage TRB */
> +#define TRB_SETUPID_BITMASK GENMASK(9, 8)
> +#define TRB_SETUPID(p) ((p) << 8)
> +#define TRB_SETUPID_TO_TYPE(p) (((p) & TRB_SETUPID_BITMASK) >> 8)
> +
> +#define TRB_SETUP_SPEEDID_USB3 0x1
> +#define TRB_SETUP_SPEEDID_USB2 0x0
> +#define TRB_SETUP_SPEEDID(p) ((p) & (1 << 7))
> +
> +#define TRB_SETUPSTAT_ACK 0x1
> +#define TRB_SETUPSTAT_STALL 0x0
> +#define TRB_SETUPSTAT(p) ((p) << 6)
> +
> +/* Isochronous TRB specific fields */
> +#define TRB_SIA BIT(31)
> +#define TRB_FRAME_ID(p) (((p) << 20) & GENMASK(30, 20))
> +
> +struct cdnsp_generic_trb {
> + __le32 field[4];
> +};
> +
> +union cdnsp_trb {
> + struct cdnsp_link_trb link;
> + struct cdnsp_transfer_event trans_event;
> + struct cdnsp_event_cmd event_cmd;
> + struct cdnsp_generic_trb generic;
> +};
> +
> +/* TRB bit mask. */
> +#define TRB_TYPE_BITMASK GENMASK(15, 10)
> +#define TRB_TYPE(p) ((p) << 10)
> +#define TRB_FIELD_TO_TYPE(p) (((p) & TRB_TYPE_BITMASK) >> 10)
> +
> +/* TRB type IDs. */
> +/* bulk, interrupt, isoc scatter/gather, and control data stage. */
> +#define TRB_NORMAL 1
> +/* Setup Stage for control transfers. */
> +#define TRB_SETUP 2
> +/* Data Stage for control transfers. */
> +#define TRB_DATA 3
> +/* Status Stage for control transfers. */
> +#define TRB_STATUS 4
> +/* ISOC transfers. */
> +#define TRB_ISOC 5
> +/* TRB for linking ring segments. */
> +#define TRB_LINK 6
> +#define TRB_EVENT_DATA 7
> +/* Transfer Ring No-op (not for the command ring). */
> +#define TRB_TR_NOOP 8
> +
> +/* Command TRBs */
> +/* Enable Slot Command. */
> +#define TRB_ENABLE_SLOT 9
> +/* Disable Slot Command. */
> +#define TRB_DISABLE_SLOT 10
> +/* Address Device Command. */
> +#define TRB_ADDR_DEV 11
> +/* Configure Endpoint Command. */
> +#define TRB_CONFIG_EP 12
> +/* Evaluate Context Command. */
> +#define TRB_EVAL_CONTEXT 13
> +/* Reset Endpoint Command. */
> +#define TRB_RESET_EP 14
> +/* Stop Transfer Ring Command. */
> +#define TRB_STOP_RING 15
> +/* Set Transfer Ring Dequeue Pointer Command. */
> +#define TRB_SET_DEQ 16
> +/* Reset Device Command. */
> +#define TRB_RESET_DEV 17
> +/* Force Event Command (opt). */
> +#define TRB_FORCE_EVENT 18
> +/* Force Header Command - generate a transaction or link management packet. */
> +#define TRB_FORCE_HEADER 22
> +/* No-op Command - not for transfer rings. */
> +#define TRB_CMD_NOOP 23
> +/* TRB IDs 24-31 reserved. */
> +
> +/* Event TRBS. */
> +/* Transfer Event. */
> +#define TRB_TRANSFER 32
> +/* Command Completion Event. */
> +#define TRB_COMPLETION 33
> +/* Port Status Change Event. */
> +#define TRB_PORT_STATUS 34
> +/* Device Controller Event. */
> +#define TRB_HC_EVENT 37
> +/* MFINDEX Wrap Event - microframe counter wrapped. */
> +#define TRB_MFINDEX_WRAP 39
> +/* TRB IDs 40-47 reserved. */
> +/* Endpoint Not Ready Event. */
> +#define TRB_ENDPOINT_NRDY 48
> +/* TRB IDs 49-53 reserved. */
> +/* Halt Endpoint Command. */
> +#define TRB_HALT_ENDPOINT 54
> +/* Doorbell Overflow Event. */
> +#define TRB_DRB_OVERFLOW 57
> +/* Flush Endpoint Command. */
> +#define TRB_FLUSH_ENDPOINT 58
> +
> +#define TRB_TYPE_LINK(x) (((x) & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK))
> +#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.
> + * The command ring is 64-byte aligned, so it must also be greater than 16.
> + */
> +#define TRBS_PER_SEGMENT 256
> +#define TRBS_PER_EVENT_SEGMENT 256
> +#define TRBS_PER_EV_DEQ_UPDATE 100
> +#define TRB_SEGMENT_SIZE (TRBS_PER_SEGMENT * 16)
> +#define TRB_SEGMENT_SHIFT (ilog2(TRB_SEGMENT_SIZE))
> +/* TRB buffer pointers can't cross 64KB boundaries. */
> +#define TRB_MAX_BUFF_SHIFT 16
> +#define TRB_MAX_BUFF_SIZE BIT(TRB_MAX_BUFF_SHIFT)
> +/* How much data is left before the 64KB boundary? */
> +#define TRB_BUFF_LEN_UP_TO_BOUNDARY(addr) (TRB_MAX_BUFF_SIZE - \
> + ((addr) & (TRB_MAX_BUFF_SIZE - 1)))
> +
> +/**
> + * struct cdnsp_segment - segment related data.
> + * @trbs: Array of Transfer Request Blocks.
> + * @next: Pointer to the next segment.
> + * @dma: DMA address of current segment.
> + * @bounce_dma: Bounce buffer DMA address .
> + * @bounce_buf: Bounce buffer virtual address.
> + * bounce_offs: Bounce buffer offset.
> + * bounce_len: Bounce buffer length.
> + */
> +struct cdnsp_segment {
> + union cdnsp_trb *trbs;
> + struct cdnsp_segment *next;
> + dma_addr_t dma;
> + /* Max packet sized bounce buffer for td-fragmant alignment */
> + dma_addr_t bounce_dma;
> + void *bounce_buf;
> + unsigned int bounce_offs;
> + unsigned int bounce_len;
> +};
> +
> +/**
> + * struct cdnsp_td - Transfer Descriptor object.
> + * @td_list: Used for binding TD with ep_ring->td_list.
> + * @preq: Request associated with this TD
> + * @start_seg: Segment containing the first_trb in TD.
> + * @first_trb: First TRB for this TD.
> + * @last_trb: Last TRB related with TD.
> + * @bounce_seg: Bounce segment for this TD.
> + * @request_length_set: actual_length of the request has already been set.
> + * @drbl - TD has been added to HW scheduler - only for stream capable
> + * endpoints.
> + */
> +struct cdnsp_td {
> + struct list_head td_list;
> + struct cdnsp_request *preq;
> + struct cdnsp_segment *start_seg;
> + union cdnsp_trb *first_trb;
> + union cdnsp_trb *last_trb;
> + struct cdnsp_segment *bounce_seg;
> + bool request_length_set;
> + bool drbl;
> +};
> +
> +/**
> + * struct cdnsp_dequeue_state - New dequeue pointer for Transfer Ring.
> + * @new_deq_seg: New dequeue segment.
> + * @new_deq_ptr: New dequeue pointer.
> + * @new_cycle_state: New cycle state.
> + * @stream_id: stream id for which new dequeue pointer has been selected.
> + */
> +struct cdnsp_dequeue_state {
> + struct cdnsp_segment *new_deq_seg;
> + union cdnsp_trb *new_deq_ptr;
> + int new_cycle_state;
> + unsigned int stream_id;
> +};
> +
> +enum cdnsp_ring_type {
> + TYPE_CTRL = 0,
> + TYPE_ISOC,
> + TYPE_BULK,
> + TYPE_INTR,
> + TYPE_STREAM,
> + TYPE_COMMAND,
> + TYPE_EVENT,
> +};
> +
> +/**
> + * struct cdnsp_ring - information describing transfer, command or event ring.
> + * @first_seg: First segment on transfer ring.
> + * @last_seg: Last segment on transfer ring.
> + * @enqueue: SW enqueue pointer address.
> + * @enq_seg: SW enqueue segment address.
> + * @dequeue: SW dequeue pointer address.
> + * @deq_seg: SW dequeue segment address.
> + * @td_list: transfer descriptor list associated with this ring.
> + * @cycle_state: Current cycle bit. Write the cycle state into the TRB cycle
> + * field to give ownership of the TRB to the device controller
> + * (if we are the producer) or to check if we own the TRB
> + * (if we are the consumer).
> + * @stream_id: Stream id
> + * @stream_active: Stream is active - PRIME packet has been detected.
> + * @stream_rejected: This ring has been rejected by host.
> + * @num_tds: Number of TDs associated with ring.
> + * @num_segs: Number of segments.
> + * @num_trbs_free: Number of free TRBs on the ring.
> + * @bounce_buf_len: Length of bounce buffer.
> + * @type: Ring type - event, transfer, or command ring.
> + * @last_td_was_short - TD is short TD.
> + * @trb_address_map: For mapping physical TRB addresses to segments in
> + * stream rings.
> + */
> +struct cdnsp_ring {
> + struct cdnsp_segment *first_seg;
> + struct cdnsp_segment *last_seg;
> + union cdnsp_trb *enqueue;
> + struct cdnsp_segment *enq_seg;
> + union cdnsp_trb *dequeue;
> + struct cdnsp_segment *deq_seg;
> + struct list_head td_list;
> + u32 cycle_state;
> + unsigned int stream_id;
> + unsigned int stream_active;
> + unsigned int stream_rejected;
> + int num_tds;
> + unsigned int num_segs;
> + unsigned int num_trbs_free;
> + unsigned int bounce_buf_len;
> + enum cdnsp_ring_type type;
> + bool last_td_was_short;
> + struct radix_tree_root *trb_address_map;
> +};
> +
> +/**
> + * struct cdnsp_erst_entry - even ring segment table entry object.
> + * @seg_addr: 64-bit event ring segment address.
> + * seg_size: Number of TRBs in segment.;
> + */
> +struct cdnsp_erst_entry {
> + __le64 seg_addr;
> + __le32 seg_size;
> + /* Set to zero */
> + __le32 rsvd;
> +};
> +
> +/**
> + * struct cdnsp_erst - even ring segment table for event ring.
> + * @entries: Array of event ring segments
> + * @num_entries: Number of segments in entries array.
> + * @erst_dma_addr: DMA address for entries array.
> + */
> +struct cdnsp_erst {
> + struct cdnsp_erst_entry *entries;
> + unsigned int num_entries;
> + dma_addr_t erst_dma_addr;
> +};
> +
> +/**
> + * struct cdnsp_request - extended device side representation of usb_request
> + * object .
> + * @td: Transfer descriptor associated with this request.
> + * @request: Generic usb_request object describing single I/O request.
> + * @list: Used to adding request to endpoint pending_list.
> + * @pep: Extended representation of usb_ep object
> + * @epnum: Endpoint number associated with usb request.
> + * @direction: Endpoint direction for usb request.
> + */
> +struct cdnsp_request {
> + struct cdnsp_td td;
> + struct usb_request request;
> + struct list_head list;
> + struct cdnsp_ep *pep;
> + u8 epnum;
> + unsigned direction:1;
> +};
> +
> +#define ERST_NUM_SEGS 1
> +
> +/* Stages used during enumeration process.*/
> +enum cdnsp_ep0_stage {
> + CDNSP_SETUP_STAGE,
> + CDNSP_DATA_STAGE,
> + CDNSP_STATUS_STAGE,
> +};
> +
> +/**
> + * struct cdnsp_port - holds information about detected ports.
> + * @port_num: Port number.
> + * @exist: Indicate if port exist.
> + * maj_rev: Major revision.
> + * min_rev: Minor revision.
> + */
> +struct cdnsp_port {
> + struct cdnsp_port_regs __iomem *regs;
> + u8 port_num;
> + u8 exist;
> + u8 maj_rev;
> + u8 min_rev;
> +};
> +
> +#define CDNSP_EXT_PORT_MAJOR(x) (((x) >> 24) & 0xff)
> +#define CDNSP_EXT_PORT_MINOR(x) (((x) >> 16) & 0xff)
> +#define CDNSP_EXT_PORT_OFF(x) ((x) & 0xff)
> +#define CDNSP_EXT_PORT_COUNT(x) (((x) >> 8) & 0xff)
> +
> +/**
> + * struct cdnsp_device - represent USB device.
> + * @dev: Pointer to device structure associated whit this controller.
> + * @gadget: Device side representation of the peripheral controller.
> + * @gadget_driver: Pointer to the gadget driver.
> + * @irq: IRQ line number used by device side.
> + * @regs:IO device memory.
> + * @cap_regs: Capability registers.
> + * @op_regs: Operational registers.
> + * @run_regs: Runtime registers.
> + * @dba: Device base address register.
> + * @ir_set: Current interrupter register set.
> + * @port20_regs: Port 2.0 Peripheral Configuration Registers.
> + * @port3x_regs: USB3.x Port Peripheral Configuration Registers.
> + * @hcs_params1: Cached register copies of read-only HCSPARAMS1
> + * @hcc_params: Cached register copies of read-only HCCPARAMS1
> + * @rev_cap: Controller capability.
> + * @setup: Temporary buffer for setup packet.
> + * @ep0_preq: Internal allocated request used during enumeration.
> + * @ep0_stage: ep0 stage during enumeration process.
> + * @three_stage_setup: Three state or two state setup.
> + * @ep0_expect_in: Data IN expected for control transfer.
> + * @setup_id: Setup identifier.
> + * @setup_speed - Speed detected for current SETUP packet.
> + * @setup_buf: Buffer for SETUP packet.
> + * @device_address: Current device address.
> + * @may_wakeup: remote wakeup enabled/disabled.
> + * @lock: Lock used in interrupt thread context.
> + * @hci_version: device controller version.
> + * @dcbaa: Device context base address array.
> + * @cmd_ring: Command ring.
> + * @cmd: Represent all what is needed to issue command on Command Ring.
> + * @event_ring: Event ring.
> + * @erst: Event Ring Segment table
> + * @slot_id: Current Slot ID. Should be 0 or 1.
> + * @out_ctx: Output context.
> + * @in_ctx: Input context.
> + * @eps: array of endpoints object associated with device.
> + * @usb2_hw_lpm_capable: hardware lpm is enabled;
> + * @u1_allowed: Allow device transition to U1 state.
> + * @u2_allowed: Allow device transition to U2 state
> + * @device_pool: DMA pool for allocating input and output context.
> + * @segment_pool: DMA pool for allocating new segments.
> + * @cdnsp_state: Current state of controller.
> + * @link_state: Current link state.
> + * @usb2_port - Port USB 2.0.
> + * @usb3_port - Port USB 3.0.
> + * @active_port - Current selected Port.
> + * @test_mode: selected Test Mode.
> + */
> +struct cdnsp_device {
> + struct device *dev;
> + struct usb_gadget gadget;
> + struct usb_gadget_driver *gadget_driver;
> + unsigned int irq;
> + void __iomem *regs;
> +
> + /* Registers map */
> + struct cdnsp_cap_regs __iomem *cap_regs;
> + struct cdnsp_op_regs __iomem *op_regs;
> + struct cdnsp_run_regs __iomem *run_regs;
> + struct cdnsp_doorbell_array __iomem *dba;
> + struct cdnsp_intr_reg __iomem *ir_set;
> + struct cdnsp_20port_cap __iomem *port20_regs;
> + struct cdnsp_3xport_cap __iomem *port3x_regs;
> +
> + /* Cached register copies of read-only CDNSP data */
> + __u32 hcs_params1;
> + __u32 hcs_params3;
> + __u32 hcc_params;
> + struct cdnsp_rev_cap rev_cap;
> + /* Lock used in interrupt thread context. */
> + spinlock_t lock;
> + struct usb_ctrlrequest setup;
> + struct cdnsp_request ep0_preq;
> + enum cdnsp_ep0_stage ep0_stage;
> + u8 three_stage_setup;
> + u8 ep0_expect_in;
> + u8 setup_id;
> + u8 setup_speed;
> + void *setup_buf;
> + u8 device_address;
> + int may_wakeup;
> + u16 hci_version;
> +
> + /* data structures */
> + struct cdnsp_device_context_array *dcbaa;
> + struct cdnsp_ring *cmd_ring;
> + struct cdnsp_command cmd;
> + struct cdnsp_ring *event_ring;
> + struct cdnsp_erst erst;
> + int slot_id;
> +
> + /*
> + * 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. .
> + */
> + struct cdnsp_container_ctx out_ctx;
> + struct cdnsp_container_ctx in_ctx;
> + struct cdnsp_ep eps[CDNSP_ENDPOINTS_NUM];
> + u8 usb2_hw_lpm_capable:1;
> + u8 u1_allowed:1;
> + u8 u2_allowed:1;
> +
> + /* DMA pools */
> + struct dma_pool *device_pool;
> + struct dma_pool *segment_pool;
> +
> +#define CDNSP_STATE_HALTED BIT(1)
> +#define CDNSP_STATE_DYING BIT(2)
> +#define CDNSP_STATE_DISCONNECT_PENDING BIT(3)
> +#define CDNSP_WAKEUP_PENDING BIT(4)
> + unsigned int cdnsp_state;
> + unsigned int link_state;
> +
> + struct cdnsp_port usb2_port;
> + struct cdnsp_port usb3_port;
> + struct cdnsp_port *active_port;
> + u16 test_mode;
> +};
> +
> +#endif /* __LINUX_CDNSP_GADGET_H */
> --
> 2.17.1
>
--
Thanks,
Peter Chen
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