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linux-pinenote/drivers/usb/dwc3/core.h
Felipe Balbi 2c4cbe6e5a usb: dwc3: add tracepoints to aid debugging 
When we're debugging hard-to-reproduce and time-sensitive
use cases, printk() poses too much overhead. That's when
the kernel's tracing infrastructure comes into play.

This patch implements a few initial tracepoints for the
dwc3 driver. More traces can be added as necessary in order
to ease the task of debugging dwc3.

Reviewed-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2014-09-05 09:55:51 -05:00

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/**
* core.h - DesignWare USB3 DRD Core Header
*
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
*
* Authors: Felipe Balbi <balbi@ti.com>,
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 of
* the License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __DRIVERS_USB_DWC3_CORE_H
#define __DRIVERS_USB_DWC3_CORE_H
#include <linux/device.h>
#include <linux/spinlock.h>
#include <linux/ioport.h>
#include <linux/list.h>
#include <linux/dma-mapping.h>
#include <linux/mm.h>
#include <linux/debugfs.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
#include <linux/phy/phy.h>
#define DWC3_MSG_MAX 500
/* Global constants */
#define DWC3_EP0_BOUNCE_SIZE 512
#define DWC3_ENDPOINTS_NUM 32
#define DWC3_XHCI_RESOURCES_NUM 2
#define DWC3_SCRATCHBUF_SIZE 4096 /* each buffer is assumed to be 4KiB */
#define DWC3_EVENT_SIZE 4 /* bytes */
#define DWC3_EVENT_MAX_NUM 64 /* 2 events/endpoint */
#define DWC3_EVENT_BUFFERS_SIZE (DWC3_EVENT_SIZE * DWC3_EVENT_MAX_NUM)
#define DWC3_EVENT_TYPE_MASK 0xfe
#define DWC3_EVENT_TYPE_DEV 0
#define DWC3_EVENT_TYPE_CARKIT 3
#define DWC3_EVENT_TYPE_I2C 4
#define DWC3_DEVICE_EVENT_DISCONNECT 0
#define DWC3_DEVICE_EVENT_RESET 1
#define DWC3_DEVICE_EVENT_CONNECT_DONE 2
#define DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE 3
#define DWC3_DEVICE_EVENT_WAKEUP 4
#define DWC3_DEVICE_EVENT_HIBER_REQ 5
#define DWC3_DEVICE_EVENT_EOPF 6
#define DWC3_DEVICE_EVENT_SOF 7
#define DWC3_DEVICE_EVENT_ERRATIC_ERROR 9
#define DWC3_DEVICE_EVENT_CMD_CMPL 10
#define DWC3_DEVICE_EVENT_OVERFLOW 11
#define DWC3_GEVNTCOUNT_MASK 0xfffc
#define DWC3_GSNPSID_MASK 0xffff0000
#define DWC3_GSNPSREV_MASK 0xffff
/* DWC3 registers memory space boundries */
#define DWC3_XHCI_REGS_START 0x0
#define DWC3_XHCI_REGS_END 0x7fff
#define DWC3_GLOBALS_REGS_START 0xc100
#define DWC3_GLOBALS_REGS_END 0xc6ff
#define DWC3_DEVICE_REGS_START 0xc700
#define DWC3_DEVICE_REGS_END 0xcbff
#define DWC3_OTG_REGS_START 0xcc00
#define DWC3_OTG_REGS_END 0xccff
/* Global Registers */
#define DWC3_GSBUSCFG0 0xc100
#define DWC3_GSBUSCFG1 0xc104
#define DWC3_GTXTHRCFG 0xc108
#define DWC3_GRXTHRCFG 0xc10c
#define DWC3_GCTL 0xc110
#define DWC3_GEVTEN 0xc114
#define DWC3_GSTS 0xc118
#define DWC3_GSNPSID 0xc120
#define DWC3_GGPIO 0xc124
#define DWC3_GUID 0xc128
#define DWC3_GUCTL 0xc12c
#define DWC3_GBUSERRADDR0 0xc130
#define DWC3_GBUSERRADDR1 0xc134
#define DWC3_GPRTBIMAP0 0xc138
#define DWC3_GPRTBIMAP1 0xc13c
#define DWC3_GHWPARAMS0 0xc140
#define DWC3_GHWPARAMS1 0xc144
#define DWC3_GHWPARAMS2 0xc148
#define DWC3_GHWPARAMS3 0xc14c
#define DWC3_GHWPARAMS4 0xc150
#define DWC3_GHWPARAMS5 0xc154
#define DWC3_GHWPARAMS6 0xc158
#define DWC3_GHWPARAMS7 0xc15c
#define DWC3_GDBGFIFOSPACE 0xc160
#define DWC3_GDBGLTSSM 0xc164
#define DWC3_GPRTBIMAP_HS0 0xc180
#define DWC3_GPRTBIMAP_HS1 0xc184
#define DWC3_GPRTBIMAP_FS0 0xc188
#define DWC3_GPRTBIMAP_FS1 0xc18c
#define DWC3_GUSB2PHYCFG(n) (0xc200 + (n * 0x04))
#define DWC3_GUSB2I2CCTL(n) (0xc240 + (n * 0x04))
#define DWC3_GUSB2PHYACC(n) (0xc280 + (n * 0x04))
#define DWC3_GUSB3PIPECTL(n) (0xc2c0 + (n * 0x04))
#define DWC3_GTXFIFOSIZ(n) (0xc300 + (n * 0x04))
#define DWC3_GRXFIFOSIZ(n) (0xc380 + (n * 0x04))
#define DWC3_GEVNTADRLO(n) (0xc400 + (n * 0x10))
#define DWC3_GEVNTADRHI(n) (0xc404 + (n * 0x10))
#define DWC3_GEVNTSIZ(n) (0xc408 + (n * 0x10))
#define DWC3_GEVNTCOUNT(n) (0xc40c + (n * 0x10))
#define DWC3_GHWPARAMS8 0xc600
/* Device Registers */
#define DWC3_DCFG 0xc700
#define DWC3_DCTL 0xc704
#define DWC3_DEVTEN 0xc708
#define DWC3_DSTS 0xc70c
#define DWC3_DGCMDPAR 0xc710
#define DWC3_DGCMD 0xc714
#define DWC3_DALEPENA 0xc720
#define DWC3_DEPCMDPAR2(n) (0xc800 + (n * 0x10))
#define DWC3_DEPCMDPAR1(n) (0xc804 + (n * 0x10))
#define DWC3_DEPCMDPAR0(n) (0xc808 + (n * 0x10))
#define DWC3_DEPCMD(n) (0xc80c + (n * 0x10))
/* OTG Registers */
#define DWC3_OCFG 0xcc00
#define DWC3_OCTL 0xcc04
#define DWC3_OEVT 0xcc08
#define DWC3_OEVTEN 0xcc0C
#define DWC3_OSTS 0xcc10
/* Bit fields */
/* Global Configuration Register */
#define DWC3_GCTL_PWRDNSCALE(n) ((n) << 19)
#define DWC3_GCTL_U2RSTECN (1 << 16)
#define DWC3_GCTL_RAMCLKSEL(x) (((x) & DWC3_GCTL_CLK_MASK) << 6)
#define DWC3_GCTL_CLK_BUS (0)
#define DWC3_GCTL_CLK_PIPE (1)
#define DWC3_GCTL_CLK_PIPEHALF (2)
#define DWC3_GCTL_CLK_MASK (3)
#define DWC3_GCTL_PRTCAP(n) (((n) & (3 << 12)) >> 12)
#define DWC3_GCTL_PRTCAPDIR(n) ((n) << 12)
#define DWC3_GCTL_PRTCAP_HOST 1
#define DWC3_GCTL_PRTCAP_DEVICE 2
#define DWC3_GCTL_PRTCAP_OTG 3
#define DWC3_GCTL_CORESOFTRESET (1 << 11)
#define DWC3_GCTL_SOFITPSYNC (1 << 10)
#define DWC3_GCTL_SCALEDOWN(n) ((n) << 4)
#define DWC3_GCTL_SCALEDOWN_MASK DWC3_GCTL_SCALEDOWN(3)
#define DWC3_GCTL_DISSCRAMBLE (1 << 3)
#define DWC3_GCTL_GBLHIBERNATIONEN (1 << 1)
#define DWC3_GCTL_DSBLCLKGTNG (1 << 0)
/* Global USB2 PHY Configuration Register */
#define DWC3_GUSB2PHYCFG_PHYSOFTRST (1 << 31)
#define DWC3_GUSB2PHYCFG_SUSPHY (1 << 6)
/* Global USB3 PIPE Control Register */
#define DWC3_GUSB3PIPECTL_PHYSOFTRST (1 << 31)
#define DWC3_GUSB3PIPECTL_SUSPHY (1 << 17)
/* Global TX Fifo Size Register */
#define DWC3_GTXFIFOSIZ_TXFDEF(n) ((n) & 0xffff)
#define DWC3_GTXFIFOSIZ_TXFSTADDR(n) ((n) & 0xffff0000)
/* Global Event Size Registers */
#define DWC3_GEVNTSIZ_INTMASK (1 << 31)
#define DWC3_GEVNTSIZ_SIZE(n) ((n) & 0xffff)
/* Global HWPARAMS1 Register */
#define DWC3_GHWPARAMS1_EN_PWROPT(n) (((n) & (3 << 24)) >> 24)
#define DWC3_GHWPARAMS1_EN_PWROPT_NO 0
#define DWC3_GHWPARAMS1_EN_PWROPT_CLK 1
#define DWC3_GHWPARAMS1_EN_PWROPT_HIB 2
#define DWC3_GHWPARAMS1_PWROPT(n) ((n) << 24)
#define DWC3_GHWPARAMS1_PWROPT_MASK DWC3_GHWPARAMS1_PWROPT(3)
/* Global HWPARAMS3 Register */
#define DWC3_GHWPARAMS3_SSPHY_IFC(n) ((n) & 3)
#define DWC3_GHWPARAMS3_SSPHY_IFC_DIS 0
#define DWC3_GHWPARAMS3_SSPHY_IFC_ENA 1
#define DWC3_GHWPARAMS3_HSPHY_IFC(n) (((n) & (3 << 2)) >> 2)
#define DWC3_GHWPARAMS3_HSPHY_IFC_DIS 0
#define DWC3_GHWPARAMS3_HSPHY_IFC_UTMI 1
#define DWC3_GHWPARAMS3_HSPHY_IFC_ULPI 2
#define DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI 3
#define DWC3_GHWPARAMS3_FSPHY_IFC(n) (((n) & (3 << 4)) >> 4)
#define DWC3_GHWPARAMS3_FSPHY_IFC_DIS 0
#define DWC3_GHWPARAMS3_FSPHY_IFC_ENA 1
/* Global HWPARAMS4 Register */
#define DWC3_GHWPARAMS4_HIBER_SCRATCHBUFS(n) (((n) & (0x0f << 13)) >> 13)
#define DWC3_MAX_HIBER_SCRATCHBUFS 15
/* Device Configuration Register */
#define DWC3_DCFG_DEVADDR(addr) ((addr) << 3)
#define DWC3_DCFG_DEVADDR_MASK DWC3_DCFG_DEVADDR(0x7f)
#define DWC3_DCFG_SPEED_MASK (7 << 0)
#define DWC3_DCFG_SUPERSPEED (4 << 0)
#define DWC3_DCFG_HIGHSPEED (0 << 0)
#define DWC3_DCFG_FULLSPEED2 (1 << 0)
#define DWC3_DCFG_LOWSPEED (2 << 0)
#define DWC3_DCFG_FULLSPEED1 (3 << 0)
#define DWC3_DCFG_LPM_CAP (1 << 22)
/* Device Control Register */
#define DWC3_DCTL_RUN_STOP (1 << 31)
#define DWC3_DCTL_CSFTRST (1 << 30)
#define DWC3_DCTL_LSFTRST (1 << 29)
#define DWC3_DCTL_HIRD_THRES_MASK (0x1f << 24)
#define DWC3_DCTL_HIRD_THRES(n) ((n) << 24)
#define DWC3_DCTL_APPL1RES (1 << 23)
/* These apply for core versions 1.87a and earlier */
#define DWC3_DCTL_TRGTULST_MASK (0x0f << 17)
#define DWC3_DCTL_TRGTULST(n) ((n) << 17)
#define DWC3_DCTL_TRGTULST_U2 (DWC3_DCTL_TRGTULST(2))
#define DWC3_DCTL_TRGTULST_U3 (DWC3_DCTL_TRGTULST(3))
#define DWC3_DCTL_TRGTULST_SS_DIS (DWC3_DCTL_TRGTULST(4))
#define DWC3_DCTL_TRGTULST_RX_DET (DWC3_DCTL_TRGTULST(5))
#define DWC3_DCTL_TRGTULST_SS_INACT (DWC3_DCTL_TRGTULST(6))
/* These apply for core versions 1.94a and later */
#define DWC3_DCTL_KEEP_CONNECT (1 << 19)
#define DWC3_DCTL_L1_HIBER_EN (1 << 18)
#define DWC3_DCTL_CRS (1 << 17)
#define DWC3_DCTL_CSS (1 << 16)
#define DWC3_DCTL_INITU2ENA (1 << 12)
#define DWC3_DCTL_ACCEPTU2ENA (1 << 11)
#define DWC3_DCTL_INITU1ENA (1 << 10)
#define DWC3_DCTL_ACCEPTU1ENA (1 << 9)
#define DWC3_DCTL_TSTCTRL_MASK (0xf << 1)
#define DWC3_DCTL_ULSTCHNGREQ_MASK (0x0f << 5)
#define DWC3_DCTL_ULSTCHNGREQ(n) (((n) << 5) & DWC3_DCTL_ULSTCHNGREQ_MASK)
#define DWC3_DCTL_ULSTCHNG_NO_ACTION (DWC3_DCTL_ULSTCHNGREQ(0))
#define DWC3_DCTL_ULSTCHNG_SS_DISABLED (DWC3_DCTL_ULSTCHNGREQ(4))
#define DWC3_DCTL_ULSTCHNG_RX_DETECT (DWC3_DCTL_ULSTCHNGREQ(5))
#define DWC3_DCTL_ULSTCHNG_SS_INACTIVE (DWC3_DCTL_ULSTCHNGREQ(6))
#define DWC3_DCTL_ULSTCHNG_RECOVERY (DWC3_DCTL_ULSTCHNGREQ(8))
#define DWC3_DCTL_ULSTCHNG_COMPLIANCE (DWC3_DCTL_ULSTCHNGREQ(10))
#define DWC3_DCTL_ULSTCHNG_LOOPBACK (DWC3_DCTL_ULSTCHNGREQ(11))
/* Device Event Enable Register */
#define DWC3_DEVTEN_VNDRDEVTSTRCVEDEN (1 << 12)
#define DWC3_DEVTEN_EVNTOVERFLOWEN (1 << 11)
#define DWC3_DEVTEN_CMDCMPLTEN (1 << 10)
#define DWC3_DEVTEN_ERRTICERREN (1 << 9)
#define DWC3_DEVTEN_SOFEN (1 << 7)
#define DWC3_DEVTEN_EOPFEN (1 << 6)
#define DWC3_DEVTEN_HIBERNATIONREQEVTEN (1 << 5)
#define DWC3_DEVTEN_WKUPEVTEN (1 << 4)
#define DWC3_DEVTEN_ULSTCNGEN (1 << 3)
#define DWC3_DEVTEN_CONNECTDONEEN (1 << 2)
#define DWC3_DEVTEN_USBRSTEN (1 << 1)
#define DWC3_DEVTEN_DISCONNEVTEN (1 << 0)
/* Device Status Register */
#define DWC3_DSTS_DCNRD (1 << 29)
/* This applies for core versions 1.87a and earlier */
#define DWC3_DSTS_PWRUPREQ (1 << 24)
/* These apply for core versions 1.94a and later */
#define DWC3_DSTS_RSS (1 << 25)
#define DWC3_DSTS_SSS (1 << 24)
#define DWC3_DSTS_COREIDLE (1 << 23)
#define DWC3_DSTS_DEVCTRLHLT (1 << 22)
#define DWC3_DSTS_USBLNKST_MASK (0x0f << 18)
#define DWC3_DSTS_USBLNKST(n) (((n) & DWC3_DSTS_USBLNKST_MASK) >> 18)
#define DWC3_DSTS_RXFIFOEMPTY (1 << 17)
#define DWC3_DSTS_SOFFN_MASK (0x3fff << 3)
#define DWC3_DSTS_SOFFN(n) (((n) & DWC3_DSTS_SOFFN_MASK) >> 3)
#define DWC3_DSTS_CONNECTSPD (7 << 0)
#define DWC3_DSTS_SUPERSPEED (4 << 0)
#define DWC3_DSTS_HIGHSPEED (0 << 0)
#define DWC3_DSTS_FULLSPEED2 (1 << 0)
#define DWC3_DSTS_LOWSPEED (2 << 0)
#define DWC3_DSTS_FULLSPEED1 (3 << 0)
/* Device Generic Command Register */
#define DWC3_DGCMD_SET_LMP 0x01
#define DWC3_DGCMD_SET_PERIODIC_PAR 0x02
#define DWC3_DGCMD_XMIT_FUNCTION 0x03
/* These apply for core versions 1.94a and later */
#define DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO 0x04
#define DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI 0x05
#define DWC3_DGCMD_SELECTED_FIFO_FLUSH 0x09
#define DWC3_DGCMD_ALL_FIFO_FLUSH 0x0a
#define DWC3_DGCMD_SET_ENDPOINT_NRDY 0x0c
#define DWC3_DGCMD_RUN_SOC_BUS_LOOPBACK 0x10
#define DWC3_DGCMD_STATUS(n) (((n) >> 15) & 1)
#define DWC3_DGCMD_CMDACT (1 << 10)
#define DWC3_DGCMD_CMDIOC (1 << 8)
/* Device Generic Command Parameter Register */
#define DWC3_DGCMDPAR_FORCE_LINKPM_ACCEPT (1 << 0)
#define DWC3_DGCMDPAR_FIFO_NUM(n) ((n) << 0)
#define DWC3_DGCMDPAR_RX_FIFO (0 << 5)
#define DWC3_DGCMDPAR_TX_FIFO (1 << 5)
#define DWC3_DGCMDPAR_LOOPBACK_DIS (0 << 0)
#define DWC3_DGCMDPAR_LOOPBACK_ENA (1 << 0)
/* Device Endpoint Command Register */
#define DWC3_DEPCMD_PARAM_SHIFT 16
#define DWC3_DEPCMD_PARAM(x) ((x) << DWC3_DEPCMD_PARAM_SHIFT)
#define DWC3_DEPCMD_GET_RSC_IDX(x) (((x) >> DWC3_DEPCMD_PARAM_SHIFT) & 0x7f)
#define DWC3_DEPCMD_STATUS(x) (((x) >> 15) & 1)
#define DWC3_DEPCMD_HIPRI_FORCERM (1 << 11)
#define DWC3_DEPCMD_CMDACT (1 << 10)
#define DWC3_DEPCMD_CMDIOC (1 << 8)
#define DWC3_DEPCMD_DEPSTARTCFG (0x09 << 0)
#define DWC3_DEPCMD_ENDTRANSFER (0x08 << 0)
#define DWC3_DEPCMD_UPDATETRANSFER (0x07 << 0)
#define DWC3_DEPCMD_STARTTRANSFER (0x06 << 0)
#define DWC3_DEPCMD_CLEARSTALL (0x05 << 0)
#define DWC3_DEPCMD_SETSTALL (0x04 << 0)
/* This applies for core versions 1.90a and earlier */
#define DWC3_DEPCMD_GETSEQNUMBER (0x03 << 0)
/* This applies for core versions 1.94a and later */
#define DWC3_DEPCMD_GETEPSTATE (0x03 << 0)
#define DWC3_DEPCMD_SETTRANSFRESOURCE (0x02 << 0)
#define DWC3_DEPCMD_SETEPCONFIG (0x01 << 0)
/* The EP number goes 0..31 so ep0 is always out and ep1 is always in */
#define DWC3_DALEPENA_EP(n) (1 << n)
#define DWC3_DEPCMD_TYPE_CONTROL 0
#define DWC3_DEPCMD_TYPE_ISOC 1
#define DWC3_DEPCMD_TYPE_BULK 2
#define DWC3_DEPCMD_TYPE_INTR 3
/* Structures */
struct dwc3_trb;
/**
* struct dwc3_event_buffer - Software event buffer representation
* @buf: _THE_ buffer
* @length: size of this buffer
* @lpos: event offset
* @count: cache of last read event count register
* @flags: flags related to this event buffer
* @dma: dma_addr_t
* @dwc: pointer to DWC controller
*/
struct dwc3_event_buffer {
void *buf;
unsigned length;
unsigned int lpos;
unsigned int count;
unsigned int flags;
#define DWC3_EVENT_PENDING BIT(0)
dma_addr_t dma;
struct dwc3 *dwc;
};
#define DWC3_EP_FLAG_STALLED (1 << 0)
#define DWC3_EP_FLAG_WEDGED (1 << 1)
#define DWC3_EP_DIRECTION_TX true
#define DWC3_EP_DIRECTION_RX false
#define DWC3_TRB_NUM 32
#define DWC3_TRB_MASK (DWC3_TRB_NUM - 1)
/**
* struct dwc3_ep - device side endpoint representation
* @endpoint: usb endpoint
* @request_list: list of requests for this endpoint
* @req_queued: list of requests on this ep which have TRBs setup
* @trb_pool: array of transaction buffers
* @trb_pool_dma: dma address of @trb_pool
* @free_slot: next slot which is going to be used
* @busy_slot: first slot which is owned by HW
* @desc: usb_endpoint_descriptor pointer
* @dwc: pointer to DWC controller
* @saved_state: ep state saved during hibernation
* @flags: endpoint flags (wedged, stalled, ...)
* @current_trb: index of current used trb
* @number: endpoint number (1 - 15)
* @type: set to bmAttributes & USB_ENDPOINT_XFERTYPE_MASK
* @resource_index: Resource transfer index
* @interval: the interval on which the ISOC transfer is started
* @name: a human readable name e.g. ep1out-bulk
* @direction: true for TX, false for RX
* @stream_capable: true when streams are enabled
*/
struct dwc3_ep {
struct usb_ep endpoint;
struct list_head request_list;
struct list_head req_queued;
struct dwc3_trb *trb_pool;
dma_addr_t trb_pool_dma;
u32 free_slot;
u32 busy_slot;
const struct usb_ss_ep_comp_descriptor *comp_desc;
struct dwc3 *dwc;
u32 saved_state;
unsigned flags;
#define DWC3_EP_ENABLED (1 << 0)
#define DWC3_EP_STALL (1 << 1)
#define DWC3_EP_WEDGE (1 << 2)
#define DWC3_EP_BUSY (1 << 4)
#define DWC3_EP_PENDING_REQUEST (1 << 5)
#define DWC3_EP_MISSED_ISOC (1 << 6)
/* This last one is specific to EP0 */
#define DWC3_EP0_DIR_IN (1 << 31)
unsigned current_trb;
u8 number;
u8 type;
u8 resource_index;
u32 interval;
char name[20];
unsigned direction:1;
unsigned stream_capable:1;
};
enum dwc3_phy {
DWC3_PHY_UNKNOWN = 0,
DWC3_PHY_USB3,
DWC3_PHY_USB2,
};
enum dwc3_ep0_next {
DWC3_EP0_UNKNOWN = 0,
DWC3_EP0_COMPLETE,
DWC3_EP0_NRDY_DATA,
DWC3_EP0_NRDY_STATUS,
};
enum dwc3_ep0_state {
EP0_UNCONNECTED = 0,
EP0_SETUP_PHASE,
EP0_DATA_PHASE,
EP0_STATUS_PHASE,
};
enum dwc3_link_state {
/* In SuperSpeed */
DWC3_LINK_STATE_U0 = 0x00, /* in HS, means ON */
DWC3_LINK_STATE_U1 = 0x01,
DWC3_LINK_STATE_U2 = 0x02, /* in HS, means SLEEP */
DWC3_LINK_STATE_U3 = 0x03, /* in HS, means SUSPEND */
DWC3_LINK_STATE_SS_DIS = 0x04,
DWC3_LINK_STATE_RX_DET = 0x05, /* in HS, means Early Suspend */
DWC3_LINK_STATE_SS_INACT = 0x06,
DWC3_LINK_STATE_POLL = 0x07,
DWC3_LINK_STATE_RECOV = 0x08,
DWC3_LINK_STATE_HRESET = 0x09,
DWC3_LINK_STATE_CMPLY = 0x0a,
DWC3_LINK_STATE_LPBK = 0x0b,
DWC3_LINK_STATE_RESET = 0x0e,
DWC3_LINK_STATE_RESUME = 0x0f,
DWC3_LINK_STATE_MASK = 0x0f,
};
/* TRB Length, PCM and Status */
#define DWC3_TRB_SIZE_MASK (0x00ffffff)
#define DWC3_TRB_SIZE_LENGTH(n) ((n) & DWC3_TRB_SIZE_MASK)
#define DWC3_TRB_SIZE_PCM1(n) (((n) & 0x03) << 24)
#define DWC3_TRB_SIZE_TRBSTS(n) (((n) & (0x0f << 28)) >> 28)
#define DWC3_TRBSTS_OK 0
#define DWC3_TRBSTS_MISSED_ISOC 1
#define DWC3_TRBSTS_SETUP_PENDING 2
#define DWC3_TRB_STS_XFER_IN_PROG 4
/* TRB Control */
#define DWC3_TRB_CTRL_HWO (1 << 0)
#define DWC3_TRB_CTRL_LST (1 << 1)
#define DWC3_TRB_CTRL_CHN (1 << 2)
#define DWC3_TRB_CTRL_CSP (1 << 3)
#define DWC3_TRB_CTRL_TRBCTL(n) (((n) & 0x3f) << 4)
#define DWC3_TRB_CTRL_ISP_IMI (1 << 10)
#define DWC3_TRB_CTRL_IOC (1 << 11)
#define DWC3_TRB_CTRL_SID_SOFN(n) (((n) & 0xffff) << 14)
#define DWC3_TRBCTL_NORMAL DWC3_TRB_CTRL_TRBCTL(1)
#define DWC3_TRBCTL_CONTROL_SETUP DWC3_TRB_CTRL_TRBCTL(2)
#define DWC3_TRBCTL_CONTROL_STATUS2 DWC3_TRB_CTRL_TRBCTL(3)
#define DWC3_TRBCTL_CONTROL_STATUS3 DWC3_TRB_CTRL_TRBCTL(4)
#define DWC3_TRBCTL_CONTROL_DATA DWC3_TRB_CTRL_TRBCTL(5)
#define DWC3_TRBCTL_ISOCHRONOUS_FIRST DWC3_TRB_CTRL_TRBCTL(6)
#define DWC3_TRBCTL_ISOCHRONOUS DWC3_TRB_CTRL_TRBCTL(7)
#define DWC3_TRBCTL_LINK_TRB DWC3_TRB_CTRL_TRBCTL(8)
/**
* struct dwc3_trb - transfer request block (hw format)
* @bpl: DW0-3
* @bph: DW4-7
* @size: DW8-B
* @trl: DWC-F
*/
struct dwc3_trb {
u32 bpl;
u32 bph;
u32 size;
u32 ctrl;
} __packed;
/**
* dwc3_hwparams - copy of HWPARAMS registers
* @hwparams0 - GHWPARAMS0
* @hwparams1 - GHWPARAMS1
* @hwparams2 - GHWPARAMS2
* @hwparams3 - GHWPARAMS3
* @hwparams4 - GHWPARAMS4
* @hwparams5 - GHWPARAMS5
* @hwparams6 - GHWPARAMS6
* @hwparams7 - GHWPARAMS7
* @hwparams8 - GHWPARAMS8
*/
struct dwc3_hwparams {
u32 hwparams0;
u32 hwparams1;
u32 hwparams2;
u32 hwparams3;
u32 hwparams4;
u32 hwparams5;
u32 hwparams6;
u32 hwparams7;
u32 hwparams8;
};
/* HWPARAMS0 */
#define DWC3_MODE(n) ((n) & 0x7)
#define DWC3_MDWIDTH(n) (((n) & 0xff00) >> 8)
/* HWPARAMS1 */
#define DWC3_NUM_INT(n) (((n) & (0x3f << 15)) >> 15)
/* HWPARAMS3 */
#define DWC3_NUM_IN_EPS_MASK (0x1f << 18)
#define DWC3_NUM_EPS_MASK (0x3f << 12)
#define DWC3_NUM_EPS(p) (((p)->hwparams3 & \
(DWC3_NUM_EPS_MASK)) >> 12)
#define DWC3_NUM_IN_EPS(p) (((p)->hwparams3 & \
(DWC3_NUM_IN_EPS_MASK)) >> 18)
/* HWPARAMS7 */
#define DWC3_RAM1_DEPTH(n) ((n) & 0xffff)
struct dwc3_request {
struct usb_request request;
struct list_head list;
struct dwc3_ep *dep;
u32 start_slot;
u8 epnum;
struct dwc3_trb *trb;
dma_addr_t trb_dma;
unsigned direction:1;
unsigned mapped:1;
unsigned queued:1;
};
/*
* struct dwc3_scratchpad_array - hibernation scratchpad array
* (format defined by hw)
*/
struct dwc3_scratchpad_array {
__le64 dma_adr[DWC3_MAX_HIBER_SCRATCHBUFS];
};
/**
* struct dwc3 - representation of our controller
* @ctrl_req: usb control request which is used for ep0
* @ep0_trb: trb which is used for the ctrl_req
* @ep0_bounce: bounce buffer for ep0
* @setup_buf: used while precessing STD USB requests
* @ctrl_req_addr: dma address of ctrl_req
* @ep0_trb: dma address of ep0_trb
* @ep0_usb_req: dummy req used while handling STD USB requests
* @ep0_bounce_addr: dma address of ep0_bounce
* @scratch_addr: dma address of scratchbuf
* @lock: for synchronizing
* @dev: pointer to our struct device
* @xhci: pointer to our xHCI child
* @event_buffer_list: a list of event buffers
* @gadget: device side representation of the peripheral controller
* @gadget_driver: pointer to the gadget driver
* @regs: base address for our registers
* @regs_size: address space size
* @nr_scratch: number of scratch buffers
* @num_event_buffers: calculated number of event buffers
* @u1u2: only used on revisions <1.83a for workaround
* @maximum_speed: maximum speed requested (mainly for testing purposes)
* @revision: revision register contents
* @dr_mode: requested mode of operation
* @usb2_phy: pointer to USB2 PHY
* @usb3_phy: pointer to USB3 PHY
* @usb2_generic_phy: pointer to USB2 PHY
* @usb3_generic_phy: pointer to USB3 PHY
* @dcfg: saved contents of DCFG register
* @gctl: saved contents of GCTL register
* @isoch_delay: wValue from Set Isochronous Delay request;
* @u2sel: parameter from Set SEL request.
* @u2pel: parameter from Set SEL request.
* @u1sel: parameter from Set SEL request.
* @u1pel: parameter from Set SEL request.
* @num_out_eps: number of out endpoints
* @num_in_eps: number of in endpoints
* @ep0_next_event: hold the next expected event
* @ep0state: state of endpoint zero
* @link_state: link state
* @speed: device speed (super, high, full, low)
* @mem: points to start of memory which is used for this struct.
* @hwparams: copy of hwparams registers
* @root: debugfs root folder pointer
* @regset: debugfs pointer to regdump file
* @test_mode: true when we're entering a USB test mode
* @test_mode_nr: test feature selector
* @delayed_status: true when gadget driver asks for delayed status
* @ep0_bounced: true when we used bounce buffer
* @ep0_expect_in: true when we expect a DATA IN transfer
* @has_hibernation: true when dwc3 was configured with Hibernation
* @is_selfpowered: true when we are selfpowered
* @needs_fifo_resize: not all users might want fifo resizing, flag it
* @pullups_connected: true when Run/Stop bit is set
* @resize_fifos: tells us it's ok to reconfigure our TxFIFO sizes.
* @setup_packet_pending: true when there's a Setup Packet in FIFO. Workaround
* @start_config_issued: true when StartConfig command has been issued
* @three_stage_setup: set if we perform a three phase setup
*/
struct dwc3 {
struct usb_ctrlrequest *ctrl_req;
struct dwc3_trb *ep0_trb;
void *ep0_bounce;
void *scratchbuf;
u8 *setup_buf;
dma_addr_t ctrl_req_addr;
dma_addr_t ep0_trb_addr;
dma_addr_t ep0_bounce_addr;
dma_addr_t scratch_addr;
struct dwc3_request ep0_usb_req;
/* device lock */
spinlock_t lock;
struct device *dev;
struct platform_device *xhci;
struct resource xhci_resources[DWC3_XHCI_RESOURCES_NUM];
struct dwc3_event_buffer **ev_buffs;
struct dwc3_ep *eps[DWC3_ENDPOINTS_NUM];
struct usb_gadget gadget;
struct usb_gadget_driver *gadget_driver;
struct usb_phy *usb2_phy;
struct usb_phy *usb3_phy;
struct phy *usb2_generic_phy;
struct phy *usb3_generic_phy;
void __iomem *regs;
size_t regs_size;
enum usb_dr_mode dr_mode;
/* used for suspend/resume */
u32 dcfg;
u32 gctl;
u32 nr_scratch;
u32 num_event_buffers;
u32 u1u2;
u32 maximum_speed;
u32 revision;
#define DWC3_REVISION_173A 0x5533173a
#define DWC3_REVISION_175A 0x5533175a
#define DWC3_REVISION_180A 0x5533180a
#define DWC3_REVISION_183A 0x5533183a
#define DWC3_REVISION_185A 0x5533185a
#define DWC3_REVISION_187A 0x5533187a
#define DWC3_REVISION_188A 0x5533188a
#define DWC3_REVISION_190A 0x5533190a
#define DWC3_REVISION_194A 0x5533194a
#define DWC3_REVISION_200A 0x5533200a
#define DWC3_REVISION_202A 0x5533202a
#define DWC3_REVISION_210A 0x5533210a
#define DWC3_REVISION_220A 0x5533220a
#define DWC3_REVISION_230A 0x5533230a
#define DWC3_REVISION_240A 0x5533240a
#define DWC3_REVISION_250A 0x5533250a
#define DWC3_REVISION_260A 0x5533260a
#define DWC3_REVISION_270A 0x5533270a
#define DWC3_REVISION_280A 0x5533280a
enum dwc3_ep0_next ep0_next_event;
enum dwc3_ep0_state ep0state;
enum dwc3_link_state link_state;
u16 isoch_delay;
u16 u2sel;
u16 u2pel;
u8 u1sel;
u8 u1pel;
u8 speed;
u8 num_out_eps;
u8 num_in_eps;
void *mem;
struct dwc3_hwparams hwparams;
struct dentry *root;
struct debugfs_regset32 *regset;
u8 test_mode;
u8 test_mode_nr;
unsigned delayed_status:1;
unsigned ep0_bounced:1;
unsigned ep0_expect_in:1;
unsigned has_hibernation:1;
unsigned is_selfpowered:1;
unsigned needs_fifo_resize:1;
unsigned pullups_connected:1;
unsigned resize_fifos:1;
unsigned setup_packet_pending:1;
unsigned start_config_issued:1;
unsigned three_stage_setup:1;
};
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
struct dwc3_event_type {
u32 is_devspec:1;
u32 type:7;
u32 reserved8_31:24;
} __packed;
#define DWC3_DEPEVT_XFERCOMPLETE 0x01
#define DWC3_DEPEVT_XFERINPROGRESS 0x02
#define DWC3_DEPEVT_XFERNOTREADY 0x03
#define DWC3_DEPEVT_RXTXFIFOEVT 0x04
#define DWC3_DEPEVT_STREAMEVT 0x06
#define DWC3_DEPEVT_EPCMDCMPLT 0x07
/**
* struct dwc3_event_depvt - Device Endpoint Events
* @one_bit: indicates this is an endpoint event (not used)
* @endpoint_number: number of the endpoint
* @endpoint_event: The event we have:
* 0x00 - Reserved
* 0x01 - XferComplete
* 0x02 - XferInProgress
* 0x03 - XferNotReady
* 0x04 - RxTxFifoEvt (IN->Underrun, OUT->Overrun)
* 0x05 - Reserved
* 0x06 - StreamEvt
* 0x07 - EPCmdCmplt
* @reserved11_10: Reserved, don't use.
* @status: Indicates the status of the event. Refer to databook for
* more information.
* @parameters: Parameters of the current event. Refer to databook for
* more information.
*/
struct dwc3_event_depevt {
u32 one_bit:1;
u32 endpoint_number:5;
u32 endpoint_event:4;
u32 reserved11_10:2;
u32 status:4;
/* Within XferNotReady */
#define DEPEVT_STATUS_TRANSFER_ACTIVE (1 << 3)
/* Within XferComplete */
#define DEPEVT_STATUS_BUSERR (1 << 0)
#define DEPEVT_STATUS_SHORT (1 << 1)
#define DEPEVT_STATUS_IOC (1 << 2)
#define DEPEVT_STATUS_LST (1 << 3)
/* Stream event only */
#define DEPEVT_STREAMEVT_FOUND 1
#define DEPEVT_STREAMEVT_NOTFOUND 2
/* Control-only Status */
#define DEPEVT_STATUS_CONTROL_DATA 1
#define DEPEVT_STATUS_CONTROL_STATUS 2
u32 parameters:16;
} __packed;
/**
* struct dwc3_event_devt - Device Events
* @one_bit: indicates this is a non-endpoint event (not used)
* @device_event: indicates it's a device event. Should read as 0x00
* @type: indicates the type of device event.
* 0 - DisconnEvt
* 1 - USBRst
* 2 - ConnectDone
* 3 - ULStChng
* 4 - WkUpEvt
* 5 - Reserved
* 6 - EOPF
* 7 - SOF
* 8 - Reserved
* 9 - ErrticErr
* 10 - CmdCmplt
* 11 - EvntOverflow
* 12 - VndrDevTstRcved
* @reserved15_12: Reserved, not used
* @event_info: Information about this event
* @reserved31_25: Reserved, not used
*/
struct dwc3_event_devt {
u32 one_bit:1;
u32 device_event:7;
u32 type:4;
u32 reserved15_12:4;
u32 event_info:9;
u32 reserved31_25:7;
} __packed;
/**
* struct dwc3_event_gevt - Other Core Events
* @one_bit: indicates this is a non-endpoint event (not used)
* @device_event: indicates it's (0x03) Carkit or (0x04) I2C event.
* @phy_port_number: self-explanatory
* @reserved31_12: Reserved, not used.
*/
struct dwc3_event_gevt {
u32 one_bit:1;
u32 device_event:7;
u32 phy_port_number:4;
u32 reserved31_12:20;
} __packed;
/**
* union dwc3_event - representation of Event Buffer contents
* @raw: raw 32-bit event
* @type: the type of the event
* @depevt: Device Endpoint Event
* @devt: Device Event
* @gevt: Global Event
*/
union dwc3_event {
u32 raw;
struct dwc3_event_type type;
struct dwc3_event_depevt depevt;
struct dwc3_event_devt devt;
struct dwc3_event_gevt gevt;
};
/**
* struct dwc3_gadget_ep_cmd_params - representation of endpoint command
* parameters
* @param2: third parameter
* @param1: second parameter
* @param0: first parameter
*/
struct dwc3_gadget_ep_cmd_params {
u32 param2;
u32 param1;
u32 param0;
};
/*
* DWC3 Features to be used as Driver Data
*/
#define DWC3_HAS_PERIPHERAL BIT(0)
#define DWC3_HAS_XHCI BIT(1)
#define DWC3_HAS_OTG BIT(3)
/* prototypes */
void dwc3_set_mode(struct dwc3 *dwc, u32 mode);
int dwc3_gadget_resize_tx_fifos(struct dwc3 *dwc);
#if IS_ENABLED(CONFIG_USB_DWC3_HOST) || IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)
int dwc3_host_init(struct dwc3 *dwc);
void dwc3_host_exit(struct dwc3 *dwc);
#else
static inline int dwc3_host_init(struct dwc3 *dwc)
{ return 0; }
static inline void dwc3_host_exit(struct dwc3 *dwc)
{ }
#endif
#if IS_ENABLED(CONFIG_USB_DWC3_GADGET) || IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)
int dwc3_gadget_init(struct dwc3 *dwc);
void dwc3_gadget_exit(struct dwc3 *dwc);
int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode);
int dwc3_gadget_get_link_state(struct dwc3 *dwc);
int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state);
int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
unsigned cmd, struct dwc3_gadget_ep_cmd_params *params);
int dwc3_send_gadget_generic_command(struct dwc3 *dwc, unsigned cmd, u32 param);
#else
static inline int dwc3_gadget_init(struct dwc3 *dwc)
{ return 0; }
static inline void dwc3_gadget_exit(struct dwc3 *dwc)
{ }
static inline int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode)
{ return 0; }
static inline int dwc3_gadget_get_link_state(struct dwc3 *dwc)
{ return 0; }
static inline int dwc3_gadget_set_link_state(struct dwc3 *dwc,
enum dwc3_link_state state)
{ return 0; }
static inline int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
unsigned cmd, struct dwc3_gadget_ep_cmd_params *params)
{ return 0; }
static inline int dwc3_send_gadget_generic_command(struct dwc3 *dwc,
int cmd, u32 param)
{ return 0; }
#endif
/* power management interface */
#if !IS_ENABLED(CONFIG_USB_DWC3_HOST)
int dwc3_gadget_prepare(struct dwc3 *dwc);
void dwc3_gadget_complete(struct dwc3 *dwc);
int dwc3_gadget_suspend(struct dwc3 *dwc);
int dwc3_gadget_resume(struct dwc3 *dwc);
#else
static inline int dwc3_gadget_prepare(struct dwc3 *dwc)
{
return 0;
}
static inline void dwc3_gadget_complete(struct dwc3 *dwc)
{
}
static inline int dwc3_gadget_suspend(struct dwc3 *dwc)
{
return 0;
}
static inline int dwc3_gadget_resume(struct dwc3 *dwc)
{
return 0;
}
#endif /* !IS_ENABLED(CONFIG_USB_DWC3_HOST) */
#endif /* __DRIVERS_USB_DWC3_CORE_H */
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