103 строки
3.6 KiB
C
103 строки
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.
|
|
*/
|
|
|
|
#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), \
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
|
|
/*
|
|
* 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)
|
|
|
|
/*
|
|
* 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)
|
|
|
|
/*
|
|
* Some UFS devices require VS_DebugSaveConfigTime is 0x10,
|
|
* enabling this quirk ensure this.
|
|
*/
|
|
#define UFS_DEVICE_QUIRK_HOST_VS_DEBUGSAVECONFIGTIME (1 << 9)
|
|
|
|
#endif /* UFS_QUIRKS_H_ */
|