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linux_dsm_epyc7002/drivers/usb/cdns3/gadget.h
Pawel Laszczak 6bbf87a131 usb:cdns3 Fix for stuck packets in on-chip OUT buffer. 
Controller for OUT endpoints has shared on-chip buffers for all incoming
packets, including ep0out. It's FIFO buffer, so packets must be handled
by DMA in correct order. If the first packet in the buffer will not be
handled, then the following packets directed for other endpoints and
functions will be blocked.

Additionally the packets directed to one endpoint can block entire on-chip
buffers. In this case transfer to other endpoints also will blocked.

To resolve this issue after raising the descriptor missing interrupt
driver prepares internal usb_request object and use it to arm DMA
transfer.

The problematic situation was observed in case when endpoint has
been enabled but no usb_request were queued. Driver try detects
such endpoints and will use this workaround only for these endpoint.

Driver use limited number of buffer. This number can be set by macro
CDNS_WA2_NUM_BUFFERS.

Such blocking situation was observed on ACM gadget. For this function
host send OUT data packet but ACM function is not prepared for
this packet. It's cause that buffer placed in on chip memory block
transfer to other endpoints.

Issue has been fixed for DEV_VER_V2 version of controller.

Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2019-08-29 10:59:05 +03:00

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* USBSS device controller driver header file
*
* Copyright (C) 2018-2019 Cadence.
* Copyright (C) 2017-2018 NXP
*
* Author: Pawel Laszczak <pawell@cadence.com>
* Pawel Jez <pjez@cadence.com>
* Peter Chen <peter.chen@nxp.com>
*/
#ifndef __LINUX_CDNS3_GADGET
#define __LINUX_CDNS3_GADGET
#include <linux/usb/gadget.h>
/*
* USBSS-DEV register interface.
* This corresponds to the USBSS Device Controller Interface
*/
/**
* struct cdns3_usb_regs - device controller registers.
* @usb_conf: Global Configuration.
* @usb_sts: Global Status.
* @usb_cmd: Global Command.
* @usb_itpn: ITP/SOF number.
* @usb_lpm: Global Command.
* @usb_ien: USB Interrupt Enable.
* @usb_ists: USB Interrupt Status.
* @ep_sel: Endpoint Select.
* @ep_traddr: Endpoint Transfer Ring Address.
* @ep_cfg: Endpoint Configuration.
* @ep_cmd: Endpoint Command.
* @ep_sts: Endpoint Status.
* @ep_sts_sid: Endpoint Status.
* @ep_sts_en: Endpoint Status Enable.
* @drbl: Doorbell.
* @ep_ien: EP Interrupt Enable.
* @ep_ists: EP Interrupt Status.
* @usb_pwr: Global Power Configuration.
* @usb_conf2: Global Configuration 2.
* @usb_cap1: Capability 1.
* @usb_cap2: Capability 2.
* @usb_cap3: Capability 3.
* @usb_cap4: Capability 4.
* @usb_cap5: Capability 5.
* @usb_cap6: Capability 6.
* @usb_cpkt1: Custom Packet 1.
* @usb_cpkt2: Custom Packet 2.
* @usb_cpkt3: Custom Packet 3.
* @ep_dma_ext_addr: Upper address for DMA operations.
* @buf_addr: Address for On-chip Buffer operations.
* @buf_data: Data for On-chip Buffer operations.
* @buf_ctrl: On-chip Buffer Access Control.
* @dtrans: DMA Transfer Mode.
* @tdl_from_trb: Source of TD Configuration.
* @tdl_beh: TDL Behavior Configuration.
* @ep_tdl: Endpoint TDL.
* @tdl_beh2: TDL Behavior 2 Configuration.
* @dma_adv_td: DMA Advance TD Configuration.
* @reserved1: Reserved.
* @cfg_regs: Configuration.
* @reserved2: Reserved.
* @dma_axi_ctrl: AXI Control.
* @dma_axi_id: AXI ID register.
* @dma_axi_cap: AXI Capability.
* @dma_axi_ctrl0: AXI Control 0.
* @dma_axi_ctrl1: AXI Control 1.
*/
struct cdns3_usb_regs {
__le32 usb_conf;
__le32 usb_sts;
__le32 usb_cmd;
__le32 usb_itpn;
__le32 usb_lpm;
__le32 usb_ien;
__le32 usb_ists;
__le32 ep_sel;
__le32 ep_traddr;
__le32 ep_cfg;
__le32 ep_cmd;
__le32 ep_sts;
__le32 ep_sts_sid;
__le32 ep_sts_en;
__le32 drbl;
__le32 ep_ien;
__le32 ep_ists;
__le32 usb_pwr;
__le32 usb_conf2;
__le32 usb_cap1;
__le32 usb_cap2;
__le32 usb_cap3;
__le32 usb_cap4;
__le32 usb_cap5;
__le32 usb_cap6;
__le32 usb_cpkt1;
__le32 usb_cpkt2;
__le32 usb_cpkt3;
__le32 ep_dma_ext_addr;
__le32 buf_addr;
__le32 buf_data;
__le32 buf_ctrl;
__le32 dtrans;
__le32 tdl_from_trb;
__le32 tdl_beh;
__le32 ep_tdl;
__le32 tdl_beh2;
__le32 dma_adv_td;
__le32 reserved1[26];
__le32 cfg_reg1;
__le32 dbg_link1;
__le32 dbg_link2;
__le32 cfg_regs[74];
__le32 reserved2[51];
__le32 dma_axi_ctrl;
__le32 dma_axi_id;
__le32 dma_axi_cap;
__le32 dma_axi_ctrl0;
__le32 dma_axi_ctrl1;
};
/* USB_CONF - bitmasks */
/* Reset USB device configuration. */
#define USB_CONF_CFGRST BIT(0)
/* Set Configuration. */
#define USB_CONF_CFGSET BIT(1)
/* Disconnect USB device in SuperSpeed. */
#define USB_CONF_USB3DIS BIT(3)
/* Disconnect USB device in HS/FS */
#define USB_CONF_USB2DIS BIT(4)
/* Little Endian access - default */
#define USB_CONF_LENDIAN BIT(5)
/*
* Big Endian access. Driver assume that byte order for
* SFRs access always is as Little Endian so this bit
* is not used.
*/
#define USB_CONF_BENDIAN BIT(6)
/* Device software reset. */
#define USB_CONF_SWRST BIT(7)
/* Singular DMA transfer mode. Only for VER < DEV_VER_V3*/
#define USB_CONF_DSING BIT(8)
/* Multiple DMA transfers mode. Only for VER < DEV_VER_V3 */
#define USB_CONF_DMULT BIT(9)
/* DMA clock turn-off enable. */
#define USB_CONF_DMAOFFEN BIT(10)
/* DMA clock turn-off disable. */
#define USB_CONF_DMAOFFDS BIT(11)
/* Clear Force Full Speed. */
#define USB_CONF_CFORCE_FS BIT(12)
/* Set Force Full Speed. */
#define USB_CONF_SFORCE_FS BIT(13)
/* Device enable. */
#define USB_CONF_DEVEN BIT(14)
/* Device disable. */
#define USB_CONF_DEVDS BIT(15)
/* L1 LPM state entry enable (used in HS/FS mode). */
#define USB_CONF_L1EN BIT(16)
/* L1 LPM state entry disable (used in HS/FS mode). */
#define USB_CONF_L1DS BIT(17)
/* USB 2.0 clock gate disable. */
#define USB_CONF_CLK2OFFEN BIT(18)
/* USB 2.0 clock gate enable. */
#define USB_CONF_CLK2OFFDS BIT(19)
/* L0 LPM state entry request (used in HS/FS mode). */
#define USB_CONF_LGO_L0 BIT(20)
/* USB 3.0 clock gate disable. */
#define USB_CONF_CLK3OFFEN BIT(21)
/* USB 3.0 clock gate enable. */
#define USB_CONF_CLK3OFFDS BIT(22)
/* Bit 23 is reserved*/
/* U1 state entry enable (used in SS mode). */
#define USB_CONF_U1EN BIT(24)
/* U1 state entry disable (used in SS mode). */
#define USB_CONF_U1DS BIT(25)
/* U2 state entry enable (used in SS mode). */
#define USB_CONF_U2EN BIT(26)
/* U2 state entry disable (used in SS mode). */
#define USB_CONF_U2DS BIT(27)
/* U0 state entry request (used in SS mode). */
#define USB_CONF_LGO_U0 BIT(28)
/* U1 state entry request (used in SS mode). */
#define USB_CONF_LGO_U1 BIT(29)
/* U2 state entry request (used in SS mode). */
#define USB_CONF_LGO_U2 BIT(30)
/* SS.Inactive state entry request (used in SS mode) */
#define USB_CONF_LGO_SSINACT BIT(31)
/* USB_STS - bitmasks */
/*
* Configuration status.
* 1 - device is in the configured state.
* 0 - device is not configured.
*/
#define USB_STS_CFGSTS_MASK BIT(0)
#define USB_STS_CFGSTS(p) ((p) & USB_STS_CFGSTS_MASK)
/*
* On-chip memory overflow.
* 0 - On-chip memory status OK.
* 1 - On-chip memory overflow.
*/
#define USB_STS_OV_MASK BIT(1)
#define USB_STS_OV(p) ((p) & USB_STS_OV_MASK)
/*
* SuperSpeed connection status.
* 0 - USB in SuperSpeed mode disconnected.
* 1 - USB in SuperSpeed mode connected.
*/
#define USB_STS_USB3CONS_MASK BIT(2)
#define USB_STS_USB3CONS(p) ((p) & USB_STS_USB3CONS_MASK)
/*
* DMA transfer configuration status.
* 0 - single request.
* 1 - multiple TRB chain
* Supported only for controller version < DEV_VER_V3
*/
#define USB_STS_DTRANS_MASK BIT(3)
#define USB_STS_DTRANS(p) ((p) & USB_STS_DTRANS_MASK)
/*
* Device speed.
* 0 - Undefined (value after reset).
* 1 - Low speed
* 2 - Full speed
* 3 - High speed
* 4 - Super speed
*/
#define USB_STS_USBSPEED_MASK GENMASK(6, 4)
#define USB_STS_USBSPEED(p) (((p) & USB_STS_USBSPEED_MASK) >> 4)
#define USB_STS_LS (0x1 << 4)
#define USB_STS_FS (0x2 << 4)
#define USB_STS_HS (0x3 << 4)
#define USB_STS_SS (0x4 << 4)
#define DEV_UNDEFSPEED(p) (((p) & USB_STS_USBSPEED_MASK) == (0x0 << 4))
#define DEV_LOWSPEED(p) (((p) & USB_STS_USBSPEED_MASK) == USB_STS_LS)
#define DEV_FULLSPEED(p) (((p) & USB_STS_USBSPEED_MASK) == USB_STS_FS)
#define DEV_HIGHSPEED(p) (((p) & USB_STS_USBSPEED_MASK) == USB_STS_HS)
#define DEV_SUPERSPEED(p) (((p) & USB_STS_USBSPEED_MASK) == USB_STS_SS)
/*
* Endianness for SFR access.
* 0 - Little Endian order (default after hardware reset).
* 1 - Big Endian order
*/
#define USB_STS_ENDIAN_MASK BIT(7)
#define USB_STS_ENDIAN(p) ((p) & USB_STS_ENDIAN_MASK)
/*
* HS/FS clock turn-off status.
* 0 - hsfs clock is always on.
* 1 - hsfs clock turn-off in L2 (HS/FS mode) is enabled
* (default after hardware reset).
*/
#define USB_STS_CLK2OFF_MASK BIT(8)
#define USB_STS_CLK2OFF(p) ((p) & USB_STS_CLK2OFF_MASK)
/*
* PCLK clock turn-off status.
* 0 - pclk clock is always on.
* 1 - pclk clock turn-off in U3 (SS mode) is enabled
* (default after hardware reset).
*/
#define USB_STS_CLK3OFF_MASK BIT(9)
#define USB_STS_CLK3OFF(p) ((p) & USB_STS_CLK3OFF_MASK)
/*
* Controller in reset state.
* 0 - Internal reset is active.
* 1 - Internal reset is not active and controller is fully operational.
*/
#define USB_STS_IN_RST_MASK BIT(10)
#define USB_STS_IN_RST(p) ((p) & USB_STS_IN_RST_MASK)
/*
* Status of the "TDL calculation basing on TRB" feature.
* 0 - disabled
* 1 - enabled
* Supported only for DEV_VER_V2 controller version.
*/
#define USB_STS_TDL_TRB_ENABLED BIT(11)
/*
* Device enable Status.
* 0 - USB device is disabled (VBUS input is disconnected from internal logic).
* 1 - USB device is enabled (VBUS input is connected to the internal logic).
*/
#define USB_STS_DEVS_MASK BIT(14)
#define USB_STS_DEVS(p) ((p) & USB_STS_DEVS_MASK)
/*
* Address status.
* 0 - USB device is default state.
* 1 - USB device is at least in address state.
*/
#define USB_STS_ADDRESSED_MASK BIT(15)
#define USB_STS_ADDRESSED(p) ((p) & USB_STS_ADDRESSED_MASK)
/*
* L1 LPM state enable status (used in HS/FS mode).
* 0 - Entering to L1 LPM state disabled.
* 1 - Entering to L1 LPM state enabled.
*/
#define USB_STS_L1ENS_MASK BIT(16)
#define USB_STS_L1ENS(p) ((p) & USB_STS_L1ENS_MASK)
/*
* Internal VBUS connection status (used both in HS/FS and SS mode).
* 0 - internal VBUS is not detected.
* 1 - internal VBUS is detected.
*/
#define USB_STS_VBUSS_MASK BIT(17)
#define USB_STS_VBUSS(p) ((p) & USB_STS_VBUSS_MASK)
/*
* HS/FS LPM state (used in FS/HS mode).
* 0 - L0 State
* 1 - L1 State
* 2 - L2 State
* 3 - L3 State
*/
#define USB_STS_LPMST_MASK GENMASK(19, 18)
#define DEV_L0_STATE(p) (((p) & USB_STS_LPMST_MASK) == (0x0 << 18))
#define DEV_L1_STATE(p) (((p) & USB_STS_LPMST_MASK) == (0x1 << 18))
#define DEV_L2_STATE(p) (((p) & USB_STS_LPMST_MASK) == (0x2 << 18))
#define DEV_L3_STATE(p) (((p) & USB_STS_LPMST_MASK) == (0x3 << 18))
/*
* Disable HS status (used in FS/HS mode).
* 0 - the disconnect bit for HS/FS mode is set .
* 1 - the disconnect bit for HS/FS mode is not set.
*/
#define USB_STS_USB2CONS_MASK BIT(20)
#define USB_STS_USB2CONS(p) ((p) & USB_STS_USB2CONS_MASK)
/*
* HS/FS mode connection status (used in FS/HS mode).
* 0 - High Speed operations in USB2.0 (FS/HS) mode not disabled.
* 1 - High Speed operations in USB2.0 (FS/HS).
*/
#define USB_STS_DISABLE_HS_MASK BIT(21)
#define USB_STS_DISABLE_HS(p) ((p) & USB_STS_DISABLE_HS_MASK)
/*
* U1 state enable status (used in SS mode).
* 0 - Entering to U1 state disabled.
* 1 - Entering to U1 state enabled.
*/
#define USB_STS_U1ENS_MASK BIT(24)
#define USB_STS_U1ENS(p) ((p) & USB_STS_U1ENS_MASK)
/*
* U2 state enable status (used in SS mode).
* 0 - Entering to U2 state disabled.
* 1 - Entering to U2 state enabled.
*/
#define USB_STS_U2ENS_MASK BIT(25)
#define USB_STS_U2ENS(p) ((p) & USB_STS_U2ENS_MASK)
/*
* SuperSpeed Link LTSSM state. This field reflects USBSS-DEV current
* SuperSpeed link state
*/
#define USB_STS_LST_MASK GENMASK(29, 26)
#define DEV_LST_U0 (((p) & USB_STS_LST_MASK) == (0x0 << 26))
#define DEV_LST_U1 (((p) & USB_STS_LST_MASK) == (0x1 << 26))
#define DEV_LST_U2 (((p) & USB_STS_LST_MASK) == (0x2 << 26))
#define DEV_LST_U3 (((p) & USB_STS_LST_MASK) == (0x3 << 26))
#define DEV_LST_DISABLED (((p) & USB_STS_LST_MASK) == (0x4 << 26))
#define DEV_LST_RXDETECT (((p) & USB_STS_LST_MASK) == (0x5 << 26))
#define DEV_LST_INACTIVE (((p) & USB_STS_LST_MASK) == (0x6 << 26))
#define DEV_LST_POLLING (((p) & USB_STS_LST_MASK) == (0x7 << 26))
#define DEV_LST_RECOVERY (((p) & USB_STS_LST_MASK) == (0x8 << 26))
#define DEV_LST_HOT_RESET (((p) & USB_STS_LST_MASK) == (0x9 << 26))
#define DEV_LST_COMP_MODE (((p) & USB_STS_LST_MASK) == (0xa << 26))
#define DEV_LST_LB_STATE (((p) & USB_STS_LST_MASK) == (0xb << 26))
/*
* DMA clock turn-off status.
* 0 - DMA clock is always on (default after hardware reset).
* 1 - DMA clock turn-off in U1, U2 and U3 (SS mode) is enabled.
*/
#define USB_STS_DMAOFF_MASK BIT(30)
#define USB_STS_DMAOFF(p) ((p) & USB_STS_DMAOFF_MASK)
/*
* SFR Endian status.
* 0 - Little Endian order (default after hardware reset).
* 1 - Big Endian order.
*/
#define USB_STS_ENDIAN2_MASK BIT(31)
#define USB_STS_ENDIAN2(p) ((p) & USB_STS_ENDIAN2_MASK)
/* USB_CMD - bitmasks */
/* Set Function Address */
#define USB_CMD_SET_ADDR BIT(0)
/*
* Function Address This field is saved to the device only when the field
* SET_ADDR is set '1 ' during write to USB_CMD register.
* Software is responsible for entering the address of the device during
* SET_ADDRESS request service. This field should be set immediately after
* the SETUP packet is decoded, and prior to confirmation of the status phase
*/
#define USB_CMD_FADDR_MASK GENMASK(7, 1)
#define USB_CMD_FADDR(p) (((p) << 1) & USB_CMD_FADDR_MASK)
/* Send Function Wake Device Notification TP (used only in SS mode). */
#define USB_CMD_SDNFW BIT(8)
/* Set Test Mode (used only in HS/FS mode). */
#define USB_CMD_STMODE BIT(9)
/* Test mode selector (used only in HS/FS mode) */
#define USB_STS_TMODE_SEL_MASK GENMASK(11, 10)
#define USB_STS_TMODE_SEL(p) (((p) << 10) & USB_STS_TMODE_SEL_MASK)
/*
* Send Latency Tolerance Message Device Notification TP (used only
* in SS mode).
*/
#define USB_CMD_SDNLTM BIT(12)
/* Send Custom Transaction Packet (used only in SS mode) */
#define USB_CMD_SPKT BIT(13)
/*Device Notification 'Function Wake' - Interface value (only in SS mode. */
#define USB_CMD_DNFW_INT_MASK GENMASK(23, 16)
#define USB_STS_DNFW_INT(p) (((p) << 16) & USB_CMD_DNFW_INT_MASK)
/*
* Device Notification 'Latency Tolerance Message' -373 BELT value [7:0]
* (used only in SS mode).
*/
#define USB_CMD_DNLTM_BELT_MASK GENMASK(27, 16)
#define USB_STS_DNLTM_BELT(p) (((p) << 16) & USB_CMD_DNLTM_BELT_MASK)
/* USB_ITPN - bitmasks */
/*
* ITP(SS) / SOF (HS/FS) number
* In SS mode this field represent number of last ITP received from host.
* In HS/FS mode this field represent number of last SOF received from host.
*/
#define USB_ITPN_MASK GENMASK(13, 0)
#define USB_ITPN(p) ((p) & USB_ITPN_MASK)
/* USB_LPM - bitmasks */
/* Host Initiated Resume Duration. */
#define USB_LPM_HIRD_MASK GENMASK(3, 0)
#define USB_LPM_HIRD(p) ((p) & USB_LPM_HIRD_MASK)
/* Remote Wakeup Enable (bRemoteWake). */
#define USB_LPM_BRW BIT(4)
/* USB_IEN - bitmasks */
/* SS connection interrupt enable */
#define USB_IEN_CONIEN BIT(0)
/* SS disconnection interrupt enable. */
#define USB_IEN_DISIEN BIT(1)
/* USB SS warm reset interrupt enable. */
#define USB_IEN_UWRESIEN BIT(2)
/* USB SS hot reset interrupt enable */
#define USB_IEN_UHRESIEN BIT(3)
/* SS link U3 state enter interrupt enable (suspend).*/
#define USB_IEN_U3ENTIEN BIT(4)
/* SS link U3 state exit interrupt enable (wakeup). */
#define USB_IEN_U3EXTIEN BIT(5)
/* SS link U2 state enter interrupt enable.*/
#define USB_IEN_U2ENTIEN BIT(6)
/* SS link U2 state exit interrupt enable.*/
#define USB_IEN_U2EXTIEN BIT(7)
/* SS link U1 state enter interrupt enable.*/
#define USB_IEN_U1ENTIEN BIT(8)
/* SS link U1 state exit interrupt enable.*/
#define USB_IEN_U1EXTIEN BIT(9)
/* ITP/SOF packet detected interrupt enable.*/
#define USB_IEN_ITPIEN BIT(10)
/* Wakeup interrupt enable.*/
#define USB_IEN_WAKEIEN BIT(11)
/* Send Custom Packet interrupt enable.*/
#define USB_IEN_SPKTIEN BIT(12)
/* HS/FS mode connection interrupt enable.*/
#define USB_IEN_CON2IEN BIT(16)
/* HS/FS mode disconnection interrupt enable.*/
#define USB_IEN_DIS2IEN BIT(17)
/* USB reset (HS/FS mode) interrupt enable.*/
#define USB_IEN_U2RESIEN BIT(18)
/* LPM L2 state enter interrupt enable.*/
#define USB_IEN_L2ENTIEN BIT(20)
/* LPM L2 state exit interrupt enable.*/
#define USB_IEN_L2EXTIEN BIT(21)
/* LPM L1 state enter interrupt enable.*/
#define USB_IEN_L1ENTIEN BIT(24)
/* LPM L1 state exit interrupt enable.*/
#define USB_IEN_L1EXTIEN BIT(25)
/* Configuration reset interrupt enable.*/
#define USB_IEN_CFGRESIEN BIT(26)
/* Start of the USB SS warm reset interrupt enable.*/
#define USB_IEN_UWRESSIEN BIT(28)
/* End of the USB SS warm reset interrupt enable.*/
#define USB_IEN_UWRESEIEN BIT(29)
#define USB_IEN_INIT (USB_IEN_U2RESIEN | USB_ISTS_DIS2I | USB_IEN_CON2IEN \
| USB_IEN_UHRESIEN | USB_IEN_UWRESIEN | USB_IEN_DISIEN \
| USB_IEN_CONIEN | USB_IEN_U3EXTIEN | USB_IEN_L2ENTIEN \
| USB_IEN_L2EXTIEN | USB_IEN_L1ENTIEN | USB_IEN_U3ENTIEN)
/* USB_ISTS - bitmasks */
/* SS Connection detected. */
#define USB_ISTS_CONI BIT(0)
/* SS Disconnection detected. */
#define USB_ISTS_DISI BIT(1)
/* UUSB warm reset detectede. */
#define USB_ISTS_UWRESI BIT(2)
/* USB hot reset detected. */
#define USB_ISTS_UHRESI BIT(3)
/* U3 link state enter detected (suspend).*/
#define USB_ISTS_U3ENTI BIT(4)
/* U3 link state exit detected (wakeup). */
#define USB_ISTS_U3EXTI BIT(5)
/* U2 link state enter detected.*/
#define USB_ISTS_U2ENTI BIT(6)
/* U2 link state exit detected.*/
#define USB_ISTS_U2EXTI BIT(7)
/* U1 link state enter detected.*/
#define USB_ISTS_U1ENTI BIT(8)
/* U1 link state exit detected.*/
#define USB_ISTS_U1EXTI BIT(9)
/* ITP/SOF packet detected.*/
#define USB_ISTS_ITPI BIT(10)
/* Wakeup detected.*/
#define USB_ISTS_WAKEI BIT(11)
/* Send Custom Packet detected.*/
#define USB_ISTS_SPKTI BIT(12)
/* HS/FS mode connection detected.*/
#define USB_ISTS_CON2I BIT(16)
/* HS/FS mode disconnection detected.*/
#define USB_ISTS_DIS2I BIT(17)
/* USB reset (HS/FS mode) detected.*/
#define USB_ISTS_U2RESI BIT(18)
/* LPM L2 state enter detected.*/
#define USB_ISTS_L2ENTI BIT(20)
/* LPM L2 state exit detected.*/
#define USB_ISTS_L2EXTI BIT(21)
/* LPM L1 state enter detected.*/
#define USB_ISTS_L1ENTI BIT(24)
/* LPM L1 state exit detected.*/
#define USB_ISTS_L1EXTI BIT(25)
/* USB configuration reset detected.*/
#define USB_ISTS_CFGRESI BIT(26)
/* Start of the USB warm reset detected.*/
#define USB_ISTS_UWRESSI BIT(28)
/* End of the USB warm reset detected.*/
#define USB_ISTS_UWRESEI BIT(29)
/* USB_SEL - bitmasks */
#define EP_SEL_EPNO_MASK GENMASK(3, 0)
/* Endpoint number. */
#define EP_SEL_EPNO(p) ((p) & EP_SEL_EPNO_MASK)
/* Endpoint direction bit - 0 - OUT, 1 - IN. */
#define EP_SEL_DIR BIT(7)
#define select_ep_in(nr) (EP_SEL_EPNO(p) | EP_SEL_DIR)
#define select_ep_out (EP_SEL_EPNO(p))
/* EP_TRADDR - bitmasks */
/* Transfer Ring address. */
#define EP_TRADDR_TRADDR(p) ((p))
/* EP_CFG - bitmasks */
/* Endpoint enable */
#define EP_CFG_ENABLE BIT(0)
/*
* Endpoint type.
* 1 - isochronous
* 2 - bulk
* 3 - interrupt
*/
#define EP_CFG_EPTYPE_MASK GENMASK(2, 1)
#define EP_CFG_EPTYPE(p) (((p) << 1) & EP_CFG_EPTYPE_MASK)
/* Stream support enable (only in SS mode). */
#define EP_CFG_STREAM_EN BIT(3)
/* TDL check (only in SS mode for BULK EP). */
#define EP_CFG_TDL_CHK BIT(4)
/* SID check (only in SS mode for BULK OUT EP). */
#define EP_CFG_SID_CHK BIT(5)
/* DMA transfer endianness. */
#define EP_CFG_EPENDIAN BIT(7)
/* Max burst size (used only in SS mode). */
#define EP_CFG_MAXBURST_MASK GENMASK(11, 8)
#define EP_CFG_MAXBURST(p) (((p) << 8) & EP_CFG_MAXBURST_MASK)
/* ISO max burst. */
#define EP_CFG_MULT_MASK GENMASK(15, 14)
#define EP_CFG_MULT(p) (((p) << 14) & EP_CFG_MULT_MASK)
/* ISO max burst. */
#define EP_CFG_MAXPKTSIZE_MASK GENMASK(26, 16)
#define EP_CFG_MAXPKTSIZE(p) (((p) << 16) & EP_CFG_MAXPKTSIZE_MASK)
/* Max number of buffered packets. */
#define EP_CFG_BUFFERING_MASK GENMASK(31, 27)
#define EP_CFG_BUFFERING(p) (((p) << 27) & EP_CFG_BUFFERING_MASK)
/* EP_CMD - bitmasks */
/* Endpoint reset. */
#define EP_CMD_EPRST BIT(0)
/* Endpoint STALL set. */
#define EP_CMD_SSTALL BIT(1)
/* Endpoint STALL clear. */
#define EP_CMD_CSTALL BIT(2)
/* Send ERDY TP. */
#define EP_CMD_ERDY BIT(3)
/* Request complete. */
#define EP_CMD_REQ_CMPL BIT(5)
/* Transfer descriptor ready. */
#define EP_CMD_DRDY BIT(6)
/* Data flush. */
#define EP_CMD_DFLUSH BIT(7)
/*
* Transfer Descriptor Length write (used only for Bulk Stream capable
* endpoints in SS mode).
* Bit Removed from DEV_VER_V3 controller version.
*/
#define EP_CMD_STDL BIT(8)
/*
* Transfer Descriptor Length (used only in SS mode for bulk endpoints).
* Bits Removed from DEV_VER_V3 controller version.
*/
#define EP_CMD_TDL_MASK GENMASK(15, 9)
#define EP_CMD_TDL_SET(p) (((p) << 9) & EP_CMD_TDL_MASK)
#define EP_CMD_TDL_GET(p) (((p) & EP_CMD_TDL_MASK) >> 9)
/* ERDY Stream ID value (used in SS mode). */
#define EP_CMD_ERDY_SID_MASK GENMASK(31, 16)
#define EP_CMD_ERDY_SID(p) (((p) << 16) & EP_CMD_ERDY_SID_MASK)
/* EP_STS - bitmasks */
/* Setup transfer complete. */
#define EP_STS_SETUP BIT(0)
/* Endpoint STALL status. */
#define EP_STS_STALL(p) ((p) & BIT(1))
/* Interrupt On Complete. */
#define EP_STS_IOC BIT(2)
/* Interrupt on Short Packet. */
#define EP_STS_ISP BIT(3)
/* Transfer descriptor missing. */
#define EP_STS_DESCMIS BIT(4)
/* Stream Rejected (used only in SS mode) */
#define EP_STS_STREAMR BIT(5)
/* EXIT from MOVE DATA State (used only for stream transfers in SS mode). */
#define EP_STS_MD_EXIT BIT(6)
/* TRB error. */
#define EP_STS_TRBERR BIT(7)
/* Not ready (used only in SS mode). */
#define EP_STS_NRDY BIT(8)
/* DMA busy bit. */
#define EP_STS_DBUSY BIT(9)
/* Endpoint Buffer Empty */
#define EP_STS_BUFFEMPTY(p) ((p) & BIT(10))
/* Current Cycle Status */
#define EP_STS_CCS(p) ((p) & BIT(11))
/* Prime (used only in SS mode. */
#define EP_STS_PRIME BIT(12)
/* Stream error (used only in SS mode). */
#define EP_STS_SIDERR BIT(13)
/* OUT size mismatch. */
#define EP_STS_OUTSMM BIT(14)
/* ISO transmission error. */
#define EP_STS_ISOERR BIT(15)
/* Host Packet Pending (only for SS mode). */
#define EP_STS_HOSTPP(p) ((p) & BIT(16))
/* Stream Protocol State Machine State (only for Bulk stream endpoints). */
#define EP_STS_SPSMST_MASK GENMASK(18, 17)
#define EP_STS_SPSMST_DISABLED(p) (((p) & EP_STS_SPSMST_MASK) >> 17)
#define EP_STS_SPSMST_IDLE(p) (((p) & EP_STS_SPSMST_MASK) >> 17)
#define EP_STS_SPSMST_START_STREAM(p) (((p) & EP_STS_SPSMST_MASK) >> 17)
#define EP_STS_SPSMST_MOVE_DATA(p) (((p) & EP_STS_SPSMST_MASK) >> 17)
/* Interrupt On Transfer complete. */
#define EP_STS_IOT BIT(19)
/* OUT queue endpoint number. */
#define EP_STS_OUTQ_NO_MASK GENMASK(27, 24)
#define EP_STS_OUTQ_NO(p) (((p) & EP_STS_OUTQ_NO_MASK) >> 24)
/* OUT queue valid flag. */
#define EP_STS_OUTQ_VAL_MASK BIT(28)
#define EP_STS_OUTQ_VAL(p) ((p) & EP_STS_OUTQ_VAL_MASK)
/* SETUP WAIT. */
#define EP_STS_STPWAIT BIT(31)
/* EP_STS_SID - bitmasks */
/* Stream ID (used only in SS mode). */
#define EP_STS_SID_MASK GENMASK(15, 0)
#define EP_STS_SID(p) ((p) & EP_STS_SID_MASK)
/* EP_STS_EN - bitmasks */
/* SETUP interrupt enable. */
#define EP_STS_EN_SETUPEN BIT(0)
/* OUT transfer missing descriptor enable. */
#define EP_STS_EN_DESCMISEN BIT(4)
/* Stream Rejected enable. */
#define EP_STS_EN_STREAMREN BIT(5)
/* Move Data Exit enable.*/
#define EP_STS_EN_MD_EXITEN BIT(6)
/* TRB enable. */
#define EP_STS_EN_TRBERREN BIT(7)
/* NRDY enable. */
#define EP_STS_EN_NRDYEN BIT(8)
/* Prime enable. */
#define EP_STS_EN_PRIMEEEN BIT(12)
/* Stream error enable. */
#define EP_STS_EN_SIDERREN BIT(13)
/* OUT size mismatch enable. */
#define EP_STS_EN_OUTSMMEN BIT(14)
/* ISO transmission error enable. */
#define EP_STS_EN_ISOERREN BIT(15)
/* Interrupt on Transmission complete enable. */
#define EP_STS_EN_IOTEN BIT(19)
/* Setup Wait interrupt enable. */
#define EP_STS_EN_STPWAITEN BIT(31)
/* DRBL- bitmasks */
#define DB_VALUE_BY_INDEX(index) (1 << (index))
#define DB_VALUE_EP0_OUT BIT(0)
#define DB_VALUE_EP0_IN BIT(16)
/* EP_IEN - bitmasks */
#define EP_IEN(index) (1 << (index))
#define EP_IEN_EP_OUT0 BIT(0)
#define EP_IEN_EP_IN0 BIT(16)
/* EP_ISTS - bitmasks */
#define EP_ISTS(index) (1 << (index))
#define EP_ISTS_EP_OUT0 BIT(0)
#define EP_ISTS_EP_IN0 BIT(16)
/* USB_PWR- bitmasks */
/*Power Shut Off capability enable*/
#define PUSB_PWR_PSO_EN BIT(0)
/*Power Shut Off capability disable*/
#define PUSB_PWR_PSO_DS BIT(1)
/*
* Enables turning-off Reference Clock.
* This bit is optional and implemented only when support for OTG is
* implemented (indicated by OTG_READY bit set to '1').
*/
#define PUSB_PWR_STB_CLK_SWITCH_EN BIT(8)
/*
* Status bit indicating that operation required by STB_CLK_SWITCH_EN write
* is completed
*/
#define PUSB_PWR_STB_CLK_SWITCH_DONE BIT(9)
/* This bit informs if Fast Registers Access is enabled. */
#define PUSB_PWR_FST_REG_ACCESS_STAT BIT(30)
/* Fast Registers Access Enable. */
#define PUSB_PWR_FST_REG_ACCESS BIT(31)
/* USB_CONF2- bitmasks */
/*
* Writing 1 disables TDL calculation basing on TRB feature in controller
* for DMULT mode.
* Bit supported only for DEV_VER_V2 version.
*/
#define USB_CONF2_DIS_TDL_TRB BIT(1)
/*
* Writing 1 enables TDL calculation basing on TRB feature in controller
* for DMULT mode.
* Bit supported only for DEV_VER_V2 version.
*/
#define USB_CONF2_EN_TDL_TRB BIT(2)
/* USB_CAP1- bitmasks */
/*
* SFR Interface type
* These field reflects type of SFR interface implemented:
* 0x0 - OCP
* 0x1 - AHB,
* 0x2 - PLB
* 0x3 - AXI
* 0x4-0xF - reserved
*/
#define USB_CAP1_SFR_TYPE_MASK GENMASK(3, 0)
#define DEV_SFR_TYPE_OCP(p) (((p) & USB_CAP1_SFR_TYPE_MASK) == 0x0)
#define DEV_SFR_TYPE_AHB(p) (((p) & USB_CAP1_SFR_TYPE_MASK) == 0x1)
#define DEV_SFR_TYPE_PLB(p) (((p) & USB_CAP1_SFR_TYPE_MASK) == 0x2)
#define DEV_SFR_TYPE_AXI(p) (((p) & USB_CAP1_SFR_TYPE_MASK) == 0x3)
/*
* SFR Interface width
* These field reflects width of SFR interface implemented:
* 0x0 - 8 bit interface,
* 0x1 - 16 bit interface,
* 0x2 - 32 bit interface
* 0x3 - 64 bit interface
* 0x4-0xF - reserved
*/
#define USB_CAP1_SFR_WIDTH_MASK GENMASK(7, 4)
#define DEV_SFR_WIDTH_8(p) (((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x0 << 4))
#define DEV_SFR_WIDTH_16(p) (((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x1 << 4))
#define DEV_SFR_WIDTH_32(p) (((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x2 << 4))
#define DEV_SFR_WIDTH_64(p) (((p) & USB_CAP1_SFR_WIDTH_MASK) == (0x3 << 4))
/*
* DMA Interface type
* These field reflects type of DMA interface implemented:
* 0x0 - OCP
* 0x1 - AHB,
* 0x2 - PLB
* 0x3 - AXI
* 0x4-0xF - reserved
*/
#define USB_CAP1_DMA_TYPE_MASK GENMASK(11, 8)
#define DEV_DMA_TYPE_OCP(p) (((p) & USB_CAP1_DMA_TYPE_MASK) == (0x0 << 8))
#define DEV_DMA_TYPE_AHB(p) (((p) & USB_CAP1_DMA_TYPE_MASK) == (0x1 << 8))
#define DEV_DMA_TYPE_PLB(p) (((p) & USB_CAP1_DMA_TYPE_MASK) == (0x2 << 8))
#define DEV_DMA_TYPE_AXI(p) (((p) & USB_CAP1_DMA_TYPE_MASK) == (0x3 << 8))
/*
* DMA Interface width
* These field reflects width of DMA interface implemented:
* 0x0 - reserved,
* 0x1 - reserved,
* 0x2 - 32 bit interface
* 0x3 - 64 bit interface
* 0x4-0xF - reserved
*/
#define USB_CAP1_DMA_WIDTH_MASK GENMASK(15, 12)
#define DEV_DMA_WIDTH_32(p) (((p) & USB_CAP1_DMA_WIDTH_MASK) == (0x2 << 12))
#define DEV_DMA_WIDTH_64(p) (((p) & USB_CAP1_DMA_WIDTH_MASK) == (0x3 << 12))
/*
* USB3 PHY Interface type
* These field reflects type of USB3 PHY interface implemented:
* 0x0 - USB PIPE,
* 0x1 - RMMI,
* 0x2-0xF - reserved
*/
#define USB_CAP1_U3PHY_TYPE_MASK GENMASK(19, 16)
#define DEV_U3PHY_PIPE(p) (((p) & USB_CAP1_U3PHY_TYPE_MASK) == (0x0 << 16))
#define DEV_U3PHY_RMMI(p) (((p) & USB_CAP1_U3PHY_TYPE_MASK) == (0x1 << 16))
/*
* USB3 PHY Interface width
* These field reflects width of USB3 PHY interface implemented:
* 0x0 - 8 bit PIPE interface,
* 0x1 - 16 bit PIPE interface,
* 0x2 - 32 bit PIPE interface,
* 0x3 - 64 bit PIPE interface
* 0x4-0xF - reserved
* Note: When SSIC interface is implemented this field shows the width of
* internal PIPE interface. The RMMI interface is always 20bit wide.
*/
#define USB_CAP1_U3PHY_WIDTH_MASK GENMASK(23, 20)
#define DEV_U3PHY_WIDTH_8(p) \
(((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x0 << 20))
#define DEV_U3PHY_WIDTH_16(p) \
(((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x1 << 16))
#define DEV_U3PHY_WIDTH_32(p) \
(((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x2 << 20))
#define DEV_U3PHY_WIDTH_64(p) \
(((p) & USB_CAP1_U3PHY_WIDTH_MASK) == (0x3 << 16))
/*
* USB2 PHY Interface enable
* These field informs if USB2 PHY interface is implemented:
* 0x0 - interface NOT implemented,
* 0x1 - interface implemented
*/
#define USB_CAP1_U2PHY_EN(p) ((p) & BIT(24))
/*
* USB2 PHY Interface type
* These field reflects type of USB2 PHY interface implemented:
* 0x0 - UTMI,
* 0x1 - ULPI
*/
#define DEV_U2PHY_ULPI(p) ((p) & BIT(25))
/*
* USB2 PHY Interface width
* These field reflects width of USB2 PHY interface implemented:
* 0x0 - 8 bit interface,
* 0x1 - 16 bit interface,
* Note: The ULPI interface is always 8bit wide.
*/
#define DEV_U2PHY_WIDTH_16(p) ((p) & BIT(26))
/*
* OTG Ready
* 0x0 - pure device mode
* 0x1 - some features and ports for CDNS USB OTG controller are implemented.
*/
#define USB_CAP1_OTG_READY(p) ((p) & BIT(27))
/*
* When set, indicates that controller supports automatic internal TDL
* calculation basing on the size provided in TRB (TRB[22:17]) for DMULT mode
* Supported only for DEV_VER_V2 controller version.
*/
#define USB_CAP1_TDL_FROM_TRB(p) ((p) & BIT(28))
/* USB_CAP2- bitmasks */
/*
* The actual size of the connected On-chip RAM memory in kB:
* - 0 means 256 kB (max supported mem size)
* - value other than 0 reflects the mem size in kB
*/
#define USB_CAP2_ACTUAL_MEM_SIZE(p) ((p) & GENMASK(7, 0))
/*
* Max supported mem size
* These field reflects width of on-chip RAM address bus width,
* which determines max supported mem size:
* 0x0-0x7 - reserved,
* 0x8 - support for 4kB mem,
* 0x9 - support for 8kB mem,
* 0xA - support for 16kB mem,
* 0xB - support for 32kB mem,
* 0xC - support for 64kB mem,
* 0xD - support for 128kB mem,
* 0xE - support for 256kB mem,
* 0xF - reserved
*/
#define USB_CAP2_MAX_MEM_SIZE(p) ((p) & GENMASK(11, 8))
/* USB_CAP3- bitmasks */
#define EP_IS_IMPLEMENTED(reg, index) ((reg) & (1 << (index)))
/* USB_CAP4- bitmasks */
#define EP_SUPPORT_ISO(reg, index) ((reg) & (1 << (index)))
/* USB_CAP5- bitmasks */
#define EP_SUPPORT_STREAM(reg, index) ((reg) & (1 << (index)))
/* USB_CAP6- bitmasks */
/* The USBSS-DEV Controller Internal build number. */
#define GET_DEV_BASE_VERSION(p) ((p) & GENMASK(23, 0))
/* The USBSS-DEV Controller version number. */
#define GET_DEV_CUSTOM_VERSION(p) ((p) & GENMASK(31, 24))
#define DEV_VER_NXP_V1 0x00024502
#define DEV_VER_TI_V1 0x00024509
#define DEV_VER_V2 0x0002450C
#define DEV_VER_V3 0x0002450d
/* DBG_LINK1- bitmasks */
/*
* LFPS_MIN_DET_U1_EXIT value This parameter configures the minimum
* time required for decoding the received LFPS as an LFPS.U1_Exit.
*/
#define DBG_LINK1_LFPS_MIN_DET_U1_EXIT(p) ((p) & GENMASK(7, 0))
/*
* LFPS_MIN_GEN_U1_EXIT value This parameter configures the minimum time for
* phytxelecidle deassertion when LFPS.U1_Exit
*/
#define DBG_LINK1_LFPS_MIN_GEN_U1_EXIT_MASK GENMASK(15, 8)
#define DBG_LINK1_LFPS_MIN_GEN_U1_EXIT(p) (((p) << 8) & GENMASK(15, 8))
/*
* RXDET_BREAK_DIS value This parameter configures terminating the Far-end
* Receiver termination detection sequence:
* 0: it is possible that USBSS_DEV will terminate Farend receiver
* termination detection sequence
* 1: USBSS_DEV will not terminate Far-end receiver termination
* detection sequence
*/
#define DBG_LINK1_RXDET_BREAK_DIS BIT(16)
/* LFPS_GEN_PING value This parameter configures the LFPS.Ping generation */
#define DBG_LINK1_LFPS_GEN_PING(p) (((p) << 17) & GENMASK(21, 17))
/*
* Set the LFPS_MIN_DET_U1_EXIT value Writing '1' to this bit writes the
* LFPS_MIN_DET_U1_EXIT field value to the device. This bit is automatically
* cleared. Writing '0' has no effect
*/
#define DBG_LINK1_LFPS_MIN_DET_U1_EXIT_SET BIT(24)
/*
* Set the LFPS_MIN_GEN_U1_EXIT value. Writing '1' to this bit writes the
* LFPS_MIN_GEN_U1_EXIT field value to the device. This bit is automatically
* cleared. Writing '0' has no effect
*/
#define DBG_LINK1_LFPS_MIN_GEN_U1_EXIT_SET BIT(25)
/*
* Set the RXDET_BREAK_DIS value Writing '1' to this bit writes
* the RXDET_BREAK_DIS field value to the device. This bit is automatically
* cleared. Writing '0' has no effect
*/
#define DBG_LINK1_RXDET_BREAK_DIS_SET BIT(26)
/*
* Set the LFPS_GEN_PING_SET value Writing '1' to this bit writes
* the LFPS_GEN_PING field value to the device. This bit is automatically
* cleared. Writing '0' has no effect."
*/
#define DBG_LINK1_LFPS_GEN_PING_SET BIT(27)
/* DMA_AXI_CTRL- bitmasks */
/* The mawprot pin configuration. */
#define DMA_AXI_CTRL_MARPROT(p) ((p) & GENMASK(2, 0))
/* The marprot pin configuration. */
#define DMA_AXI_CTRL_MAWPROT(p) (((p) & GENMASK(2, 0)) << 16)
#define DMA_AXI_CTRL_NON_SECURE 0x02
#define gadget_to_cdns3_device(g) (container_of(g, struct cdns3_device, gadget))
#define ep_to_cdns3_ep(ep) (container_of(ep, struct cdns3_endpoint, endpoint))
/*-------------------------------------------------------------------------*/
/*
* USBSS-DEV DMA interface.
*/
#define TRBS_PER_SEGMENT 40
#define ISO_MAX_INTERVAL 10
#if TRBS_PER_SEGMENT < 2
#error "Incorrect TRBS_PER_SEGMENT. Minimal Transfer Ring size is 2."
#endif
/*
*Only for ISOC endpoints - maximum number of TRBs is calculated as
* pow(2, bInterval-1) * number of usb requests. It is limitation made by
* driver to save memory. Controller must prepare TRB for each ITP even
* if bInterval > 1. It's the reason why driver needs so many TRBs for
* isochronous endpoints.
*/
#define TRBS_PER_ISOC_SEGMENT (ISO_MAX_INTERVAL * 8)
#define GET_TRBS_PER_SEGMENT(ep_type) ((ep_type) == USB_ENDPOINT_XFER_ISOC ? \
TRBS_PER_ISOC_SEGMENT : TRBS_PER_SEGMENT)
/**
* struct cdns3_trb - represent Transfer Descriptor block.
* @buffer: pointer to buffer data
* @length: length of data
* @control: control flags.
*
* This structure describes transfer block serviced by DMA module.
*/
struct cdns3_trb {
__le32 buffer;
__le32 length;
__le32 control;
};
#define TRB_SIZE (sizeof(struct cdns3_trb))
#define TRB_RING_SIZE (TRB_SIZE * TRBS_PER_SEGMENT)
#define TRB_ISO_RING_SIZE (TRB_SIZE * TRBS_PER_ISOC_SEGMENT)
#define TRB_CTRL_RING_SIZE (TRB_SIZE * 2)
/* 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 , and control data stage */
#define TRB_NORMAL 1
/* TRB for linking ring segments */
#define TRB_LINK 6
/* Cycle bit - indicates TRB ownership by driver or hw*/
#define TRB_CYCLE BIT(0)
/*
* When set to '1', the device will toggle its interpretation of the Cycle bit
*/
#define TRB_TOGGLE BIT(1)
/*
* Short Packet (SP). OUT EPs at DMULT=1 only. Indicates if the TRB was
* processed while USB short packet was received. No more buffers defined by
* the TD will be used. DMA will automatically advance to next TD.
* - Shall be set to 0 by Software when putting TRB on the Transfer Ring
* - Shall be set to 1 by Controller when Short Packet condition for this TRB
* is detected independent if ISP is set or not.
*/
#define TRB_SP BIT(1)
/* Interrupt on short packet*/
#define TRB_ISP BIT(2)
/*Setting this bit enables FIFO DMA operation mode*/
#define TRB_FIFO_MODE BIT(3)
/* Set PCIe no snoop attribute */
#define TRB_CHAIN BIT(4)
/* Interrupt on completion */
#define TRB_IOC BIT(5)
/* stream ID bitmasks. */
#define TRB_STREAM_ID_BITMASK GENMASK(31, 16)
#define TRB_STREAM_ID(p) ((p) << 16)
#define TRB_FIELD_TO_STREAMID(p) (((p) & TRB_STREAM_ID_BITMASK) >> 16)
/* Size of TD expressed in USB packets for HS/FS mode. */
#define TRB_TDL_HS_SIZE(p) (((p) << 16) & GENMASK(31, 16))
#define TRB_TDL_HS_SIZE_GET(p) (((p) & GENMASK(31, 16)) >> 16)
/* transfer_len bitmasks. */
#define TRB_LEN(p) ((p) & GENMASK(16, 0))
/* Size of TD expressed in USB packets for SS mode. */
#define TRB_TDL_SS_SIZE(p) (((p) << 17) & GENMASK(23, 17))
#define TRB_TDL_SS_SIZE_GET(p) (((p) & GENMASK(23, 17)) >> 17)
/* transfer_len bitmasks - bits 31:24 */
#define TRB_BURST_LEN(p) (((p) << 24) & GENMASK(31, 24))
#define TRB_BURST_LEN_GET(p) (((p) & GENMASK(31, 24)) >> 24)
/* Data buffer pointer bitmasks*/
#define TRB_BUFFER(p) ((p) & GENMASK(31, 0))
/*-------------------------------------------------------------------------*/
/* Driver numeric constants */
/* Such declaration should be added to ch9.h */
#define USB_DEVICE_MAX_ADDRESS 127
/* Endpoint init values */
#define CDNS3_EP_MAX_PACKET_LIMIT 1024
#define CDNS3_EP_MAX_STREAMS 15
#define CDNS3_EP0_MAX_PACKET_LIMIT 512
/* All endpoints including EP0 */
#define CDNS3_ENDPOINTS_MAX_COUNT 32
#define CDNS3_EP_ZLP_BUF_SIZE 1024
#define CDNS3_EP_BUF_SIZE 2 /* KB */
#define CDNS3_EP_ISO_HS_MULT 3
#define CDNS3_EP_ISO_SS_BURST 3
#define CDNS3_MAX_NUM_DESCMISS_BUF 32
#define CDNS3_DESCMIS_BUF_SIZE 2048 /* Bytes */
#define CDNS3_WA2_NUM_BUFFERS 128
/*-------------------------------------------------------------------------*/
/* Used structs */
struct cdns3_device;
/**
* struct cdns3_endpoint - extended device side representation of USB endpoint.
* @endpoint: usb endpoint
* @pending_req_list: list of requests queuing on transfer ring.
* @deferred_req_list: list of requests waiting for queuing on transfer ring.
* @wa2_descmiss_req_list: list of requests internally allocated by driver.
* @trb_pool: transfer ring - array of transaction buffers
* @trb_pool_dma: dma address of transfer ring
* @cdns3_dev: device associated with this endpoint
* @name: a human readable name e.g. ep1out
* @flags: specify the current state of endpoint
* @descmis_req: internal transfer object used for getting data from on-chip
* buffer. It can happen only if function driver doesn't send usb_request
* object on time.
* @dir: endpoint direction
* @num: endpoint number (1 - 15)
* @type: set to bmAttributes & USB_ENDPOINT_XFERTYPE_MASK
* @interval: interval between packets used for ISOC endpoint.
* @free_trbs: number of free TRBs in transfer ring
* @num_trbs: number of all TRBs in transfer ring
* @pcs: producer cycle state
* @ccs: consumer cycle state
* @enqueue: enqueue index in transfer ring
* @dequeue: dequeue index in transfer ring
* @trb_burst_size: number of burst used in trb.
*/
struct cdns3_endpoint {
struct usb_ep endpoint;
struct list_head pending_req_list;
struct list_head deferred_req_list;
struct list_head wa2_descmiss_req_list;
int wa2_counter;
struct cdns3_trb *trb_pool;
dma_addr_t trb_pool_dma;
struct cdns3_device *cdns3_dev;
char name[20];
#define EP_ENABLED BIT(0)
#define EP_STALLED BIT(1)
#define EP_STALL_PENDING BIT(2)
#define EP_WEDGE BIT(3)
#define EP_TRANSFER_STARTED BIT(4)
#define EP_UPDATE_EP_TRBADDR BIT(5)
#define EP_PENDING_REQUEST BIT(6)
#define EP_RING_FULL BIT(7)
#define EP_CLAIMED BIT(8)
#define EP_DEFERRED_DRDY BIT(9)
#define EP_QUIRK_ISO_OUT_EN BIT(10)
#define EP_QUIRK_END_TRANSFER BIT(11)
#define EP_QUIRK_EXTRA_BUF_DET BIT(12)
#define EP_QUIRK_EXTRA_BUF_EN BIT(13)
u32 flags;
struct cdns3_request *descmis_req;
u8 dir;
u8 num;
u8 type;
int interval;
int free_trbs;
int num_trbs;
u8 pcs;
u8 ccs;
int enqueue;
int dequeue;
u8 trb_burst_size;
unsigned int wa1_set:1;
struct cdns3_trb *wa1_trb;
unsigned int wa1_trb_index;
unsigned int wa1_cycle_bit:1;
};
/**
* struct cdns3_aligned_buf - represent aligned buffer used for DMA transfer
* @buf: aligned to 8 bytes data buffer. Buffer address used in
* TRB shall be aligned to 8.
* @dma: dma address
* @size: size of buffer
* @in_use: inform if this buffer is associated with usb_request
* @list: used to adding instance of this object to list
*/
struct cdns3_aligned_buf {
void *buf;
dma_addr_t dma;
u32 size;
int in_use:1;
struct list_head list;
};
/**
* struct cdns3_request - extended device side representation of usb_request
* object .
* @request: generic usb_request object describing single I/O request.
* @priv_ep: extended representation of usb_ep object
* @trb: the first TRB association with this request
* @start_trb: number of the first TRB in transfer ring
* @end_trb: number of the last TRB in transfer ring
* @aligned_buf: object holds information about aligned buffer associated whit
* this endpoint
* @flags: flag specifying special usage of request
* @list: used by internally allocated request to add to wa2_descmiss_req_list.
*/
struct cdns3_request {
struct usb_request request;
struct cdns3_endpoint *priv_ep;
struct cdns3_trb *trb;
int start_trb;
int end_trb;
struct cdns3_aligned_buf *aligned_buf;
#define REQUEST_PENDING BIT(0)
#define REQUEST_INTERNAL BIT(1)
#define REQUEST_INTERNAL_CH BIT(2)
#define REQUEST_ZLP BIT(3)
#define REQUEST_UNALIGNED BIT(4)
u32 flags;
struct list_head list;
};
#define to_cdns3_request(r) (container_of(r, struct cdns3_request, request))
/*Stages used during enumeration process.*/
#define CDNS3_SETUP_STAGE 0x0
#define CDNS3_DATA_STAGE 0x1
#define CDNS3_STATUS_STAGE 0x2
/**
* struct cdns3_device - represent USB device.
* @dev: pointer to device structure associated whit this controller
* @sysdev: pointer to the DMA capable device
* @gadget: device side representation of the peripheral controller
* @gadget_driver: pointer to the gadget driver
* @dev_ver: device controller version.
* @lock: for synchronizing
* @regs: base address for device side registers
* @setup_buf: used while processing usb control requests
* @setup_dma: dma address for setup_buf
* @zlp_buf - zlp buffer
* @ep0_stage: ep0 stage during enumeration process.
* @ep0_data_dir: direction for control transfer
* @eps: array of pointers to all endpoints with exclusion ep0
* @aligned_buf_list: list of aligned buffers internally allocated by driver
* @aligned_buf_wq: workqueue freeing no longer used aligned buf.
* @selected_ep: actually selected endpoint. It's used only to improve
* performance.
* @isoch_delay: value from Set Isoch Delay request. Only valid on SS/SSP.
* @u1_allowed: allow device transition to u1 state
* @u2_allowed: allow device transition to u2 state
* @is_selfpowered: device is self powered
* @setup_pending: setup packet is processing by gadget driver
* @hw_configured_flag: hardware endpoint configuration was set.
* @wake_up_flag: allow device to remote up the host
* @status_completion_no_call: indicate that driver is waiting for status s
* stage completion. It's used in deferred SET_CONFIGURATION request.
* @onchip_buffers: number of available on-chip buffers.
* @onchip_used_size: actual size of on-chip memory assigned to endpoints.
* @pending_status_wq: workqueue handling status stage for deferred requests.
* @pending_status_request: request for which status stage was deferred
*/
struct cdns3_device {
struct device *dev;
struct device *sysdev;
struct usb_gadget gadget;
struct usb_gadget_driver *gadget_driver;
#define CDNS_REVISION_V0 0x00024501
#define CDNS_REVISION_V1 0x00024509
u32 dev_ver;
/* generic spin-lock for drivers */
spinlock_t lock;
struct cdns3_usb_regs __iomem *regs;
struct usb_ctrlrequest *setup_buf;
dma_addr_t setup_dma;
void *zlp_buf;
u8 ep0_stage;
int ep0_data_dir;
struct cdns3_endpoint *eps[CDNS3_ENDPOINTS_MAX_COUNT];
struct list_head aligned_buf_list;
struct work_struct aligned_buf_wq;
u32 selected_ep;
u16 isoch_delay;
unsigned wait_for_setup:1;
unsigned u1_allowed:1;
unsigned u2_allowed:1;
unsigned is_selfpowered:1;
unsigned setup_pending:1;
int hw_configured_flag:1;
int wake_up_flag:1;
unsigned status_completion_no_call:1;
int out_mem_is_allocated;
struct work_struct pending_status_wq;
struct usb_request *pending_status_request;
/*in KB */
u16 onchip_buffers;
u16 onchip_used_size;
};
void cdns3_set_register_bit(void __iomem *ptr, u32 mask);
dma_addr_t cdns3_trb_virt_to_dma(struct cdns3_endpoint *priv_ep,
struct cdns3_trb *trb);
enum usb_device_speed cdns3_get_speed(struct cdns3_device *priv_dev);
void cdns3_pending_setup_status_handler(struct work_struct *work);
void cdns3_hw_reset_eps_config(struct cdns3_device *priv_dev);
void cdns3_set_hw_configuration(struct cdns3_device *priv_dev);
void cdns3_select_ep(struct cdns3_device *priv_dev, u32 ep);
void cdns3_allow_enable_l1(struct cdns3_device *priv_dev, int enable);
struct usb_request *cdns3_next_request(struct list_head *list);
int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
struct usb_request *request);
void cdns3_rearm_transfer(struct cdns3_endpoint *priv_ep, u8 rearm);
int cdns3_allocate_trb_pool(struct cdns3_endpoint *priv_ep);
u8 cdns3_ep_addr_to_index(u8 ep_addr);
int cdns3_gadget_ep_set_wedge(struct usb_ep *ep);
int cdns3_gadget_ep_set_halt(struct usb_ep *ep, int value);
void __cdns3_gadget_ep_set_halt(struct cdns3_endpoint *priv_ep);
int __cdns3_gadget_ep_clear_halt(struct cdns3_endpoint *priv_ep);
struct usb_request *cdns3_gadget_ep_alloc_request(struct usb_ep *ep,
gfp_t gfp_flags);
void cdns3_gadget_ep_free_request(struct usb_ep *ep,
struct usb_request *request);
int cdns3_gadget_ep_dequeue(struct usb_ep *ep, struct usb_request *request);
void cdns3_gadget_giveback(struct cdns3_endpoint *priv_ep,
struct cdns3_request *priv_req,
int status);
int cdns3_init_ep0(struct cdns3_device *priv_dev,
struct cdns3_endpoint *priv_ep);
void cdns3_ep0_config(struct cdns3_device *priv_dev);
void cdns3_ep_config(struct cdns3_endpoint *priv_ep);
void cdns3_check_ep0_interrupt_proceed(struct cdns3_device *priv_dev, int dir);
int __cdns3_gadget_wakeup(struct cdns3_device *priv_dev);
#endif /* __LINUX_CDNS3_GADGET */
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