mirror of https://gitee.com/openkylin/linux.git
135 lines
4.8 KiB
C
135 lines
4.8 KiB
C
/*
|
|
* Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 and
|
|
* only version 2 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 _UFS_QUIRKS_H_
|
|
#define _UFS_QUIRKS_H_
|
|
|
|
/* return true if s1 is a prefix of s2 */
|
|
#define STR_PRFX_EQUAL(s1, s2) !strncmp(s1, s2, strlen(s1))
|
|
|
|
#define UFS_ANY_VENDOR 0xFFFF
|
|
#define UFS_ANY_MODEL "ANY_MODEL"
|
|
|
|
#define UFS_VENDOR_TOSHIBA 0x198
|
|
#define UFS_VENDOR_SAMSUNG 0x1CE
|
|
#define UFS_VENDOR_SKHYNIX 0x1AD
|
|
|
|
/**
|
|
* ufs_dev_fix - ufs device quirk info
|
|
* @card: ufs card details
|
|
* @quirk: device quirk
|
|
*/
|
|
struct ufs_dev_fix {
|
|
struct ufs_dev_desc card;
|
|
unsigned int quirk;
|
|
};
|
|
|
|
#define END_FIX { { 0 }, 0 }
|
|
|
|
/* add specific device quirk */
|
|
#define UFS_FIX(_vendor, _model, _quirk) { \
|
|
.card.wmanufacturerid = (_vendor),\
|
|
.card.model = (_model), \
|
|
.quirk = (_quirk), \
|
|
}
|
|
|
|
/*
|
|
* If UFS device is having issue in processing LCC (Line Control
|
|
* Command) coming from UFS host controller then enable this quirk.
|
|
* When this quirk is enabled, host controller driver should disable
|
|
* the LCC transmission on UFS host controller (by clearing
|
|
* TX_LCC_ENABLE attribute of host to 0).
|
|
*/
|
|
#define UFS_DEVICE_QUIRK_BROKEN_LCC (1 << 0)
|
|
|
|
/*
|
|
* Some UFS devices don't need VCCQ rail for device operations. Enabling this
|
|
* quirk for such devices will make sure that VCCQ rail is not voted.
|
|
*/
|
|
#define UFS_DEVICE_NO_VCCQ (1 << 1)
|
|
|
|
/*
|
|
* Some vendor's UFS device sends back to back NACs for the DL data frames
|
|
* causing the host controller to raise the DFES error status. Sometimes
|
|
* such UFS devices send back to back NAC without waiting for new
|
|
* retransmitted DL frame from the host and in such cases it might be possible
|
|
* the Host UniPro goes into bad state without raising the DFES error
|
|
* interrupt. If this happens then all the pending commands would timeout
|
|
* only after respective SW command (which is generally too large).
|
|
*
|
|
* We can workaround such device behaviour like this:
|
|
* - As soon as SW sees the DL NAC error, it should schedule the error handler
|
|
* - Error handler would sleep for 50ms to see if there are any fatal errors
|
|
* raised by UFS controller.
|
|
* - If there are fatal errors then SW does normal error recovery.
|
|
* - If there are no fatal errors then SW sends the NOP command to device
|
|
* to check if link is alive.
|
|
* - If NOP command times out, SW does normal error recovery
|
|
* - If NOP command succeed, skip the error handling.
|
|
*
|
|
* If DL NAC error is seen multiple times with some vendor's UFS devices then
|
|
* enable this quirk to initiate quick error recovery and also silence related
|
|
* error logs to reduce spamming of kernel logs.
|
|
*/
|
|
#define UFS_DEVICE_QUIRK_RECOVERY_FROM_DL_NAC_ERRORS (1 << 2)
|
|
|
|
/*
|
|
* Some UFS devices may not work properly after resume if the link was kept
|
|
* in off state during suspend. Enabling this quirk will not allow the
|
|
* link to be kept in off state during suspend.
|
|
*/
|
|
#define UFS_DEVICE_QUIRK_NO_LINK_OFF (1 << 3)
|
|
|
|
/*
|
|
* Few Toshiba UFS device models advertise RX_MIN_ACTIVATETIME_CAPABILITY as
|
|
* 600us which may not be enough for reliable hibern8 exit hardware sequence
|
|
* from UFS device.
|
|
* To workaround this issue, host should set its PA_TACTIVATE time to 1ms even
|
|
* if device advertises RX_MIN_ACTIVATETIME_CAPABILITY less than 1ms.
|
|
*/
|
|
#define UFS_DEVICE_QUIRK_PA_TACTIVATE (1 << 4)
|
|
|
|
/*
|
|
* Some UFS memory devices may have really low read/write throughput in
|
|
* FAST AUTO mode, enable this quirk to make sure that FAST AUTO mode is
|
|
* never enabled for such devices.
|
|
*/
|
|
#define UFS_DEVICE_NO_FASTAUTO (1 << 5)
|
|
|
|
/*
|
|
* It seems some UFS devices may keep drawing more than sleep current
|
|
* (atleast for 500us) from UFS rails (especially from VCCQ rail).
|
|
* To avoid this situation, add 2ms delay before putting these UFS
|
|
* rails in LPM mode.
|
|
*/
|
|
#define UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM (1 << 6)
|
|
|
|
/*
|
|
* Some UFS devices require host PA_TACTIVATE to be lower than device
|
|
* PA_TACTIVATE, enabling this quirk ensure this.
|
|
*/
|
|
#define UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE (1 << 7)
|
|
|
|
/*
|
|
* The max. value PA_SaveConfigTime is 250 (10us) but this is not enough for
|
|
* some vendors.
|
|
* Gear switch from PWM to HS may fail even with this max. PA_SaveConfigTime.
|
|
* Gear switch can be issued by host controller as an error recovery and any
|
|
* software delay will not help on this case so we need to increase
|
|
* PA_SaveConfigTime to >32us as per vendor recommendation.
|
|
*/
|
|
#define UFS_DEVICE_QUIRK_HOST_PA_SAVECONFIGTIME (1 << 8)
|
|
|
|
#endif /* UFS_QUIRKS_H_ */
|