drivers/scsi/ufs/ufs_quirks.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.
   4  */
   5
   6 #ifndef _UFS_QUIRKS_H_
   7 #define _UFS_QUIRKS_H_
   8
   9 /* return true if s1 is a prefix of s2 */
  10 #define STR_PRFX_EQUAL(s1, s2) !strncmp(s1, s2, strlen(s1))
  11
  12 #define UFS_ANY_VENDOR 0xFFFF
  13 #define UFS_ANY_MODEL  "ANY_MODEL"
  14
  15 #define UFS_VENDOR_MICRON      0x12C
  16 #define UFS_VENDOR_SAMSUNG     0x1CE
  17 #define UFS_VENDOR_SKHYNIX     0x1AD
  18 #define UFS_VENDOR_TOSHIBA     0x198
  19 #define UFS_VENDOR_WDC         0x145
  20
  21 /**
  22  * ufs_dev_fix - ufs device quirk info
  23  * @card: ufs card details
  24  * @quirk: device quirk
  25  */
  26 struct ufs_dev_fix {
  27         u16 wmanufacturerid;
  28         u8 *model;
  29         unsigned int quirk;
  30 };
  31
  32 #define END_FIX { }
  33
  34 /* add specific device quirk */
  35 #define UFS_FIX(_vendor, _model, _quirk) { \
  36         .wmanufacturerid = (_vendor),\
  37         .model = (_model),                 \
  38         .quirk = (_quirk),                 \
  39 }
  40
  41 /*
  42  * Some vendor's UFS device sends back to back NACs for the DL data frames
  43  * causing the host controller to raise the DFES error status. Sometimes
  44  * such UFS devices send back to back NAC without waiting for new
  45  * retransmitted DL frame from the host and in such cases it might be possible
  46  * the Host UniPro goes into bad state without raising the DFES error
  47  * interrupt. If this happens then all the pending commands would timeout
  48  * only after respective SW command (which is generally too large).
  49  *
  50  * We can workaround such device behaviour like this:
  51  * - As soon as SW sees the DL NAC error, it should schedule the error handler
  52  * - Error handler would sleep for 50ms to see if there are any fatal errors
  53  *   raised by UFS controller.
  54  *    - If there are fatal errors then SW does normal error recovery.
  55  *    - If there are no fatal errors then SW sends the NOP command to device
  56  *      to check if link is alive.
  57  *        - If NOP command times out, SW does normal error recovery
  58  *        - If NOP command succeed, skip the error handling.
  59  *
  60  * If DL NAC error is seen multiple times with some vendor's UFS devices then
  61  * enable this quirk to initiate quick error recovery and also silence related
  62  * error logs to reduce spamming of kernel logs.
  63  */
  64 #define UFS_DEVICE_QUIRK_RECOVERY_FROM_DL_NAC_ERRORS (1 << 2)
  65
  66 /*
  67  * Few Toshiba UFS device models advertise RX_MIN_ACTIVATETIME_CAPABILITY as
  68  * 600us which may not be enough for reliable hibern8 exit hardware sequence
  69  * from UFS device.
  70  * To workaround this issue, host should set its PA_TACTIVATE time to 1ms even
  71  * if device advertises RX_MIN_ACTIVATETIME_CAPABILITY less than 1ms.
  72  */
  73 #define UFS_DEVICE_QUIRK_PA_TACTIVATE   (1 << 4)
  74
  75 /*
  76  * It seems some UFS devices may keep drawing more than sleep current
  77  * (atleast for 500us) from UFS rails (especially from VCCQ rail).
  78  * To avoid this situation, add 2ms delay before putting these UFS
  79  * rails in LPM mode.
  80  */
  81 #define UFS_DEVICE_QUIRK_DELAY_BEFORE_LPM       (1 << 6)
  82
  83 /*
  84  * Some UFS devices require host PA_TACTIVATE to be lower than device
  85  * PA_TACTIVATE, enabling this quirk ensure this.
  86  */
  87 #define UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE      (1 << 7)
  88
  89 /*
  90  * The max. value PA_SaveConfigTime is 250 (10us) but this is not enough for
  91  * some vendors.
  92  * Gear switch from PWM to HS may fail even with this max. PA_SaveConfigTime.
  93  * Gear switch can be issued by host controller as an error recovery and any
  94  * software delay will not help on this case so we need to increase
  95  * PA_SaveConfigTime to >32us as per vendor recommendation.
  96  */
  97 #define UFS_DEVICE_QUIRK_HOST_PA_SAVECONFIGTIME (1 << 8)
  98
  99 /*
 100  * Some UFS devices require VS_DebugSaveConfigTime is 0x10,
 101  * enabling this quirk ensure this.
 102  */
 103 #define UFS_DEVICE_QUIRK_HOST_VS_DEBUGSAVECONFIGTIME    (1 << 9)
 104
 105 /*
 106  * Some pre-3.1 UFS devices can support extended features by upgrading
 107  * the firmware. Enable this quirk to make UFS core driver probe and enable
 108  * supported features on such devices.
 109  */
 110 #define UFS_DEVICE_QUIRK_SUPPORT_EXTENDED_FEATURES (1 << 10)
 111
 112 /*
 113  * Some UFS devices require delay after VCC power rail is turned-off.
 114  * Enable this quirk to introduce 5ms delays after VCC power-off during
 115  * suspend flow.
 116  */
 117 #define UFS_DEVICE_QUIRK_DELAY_AFTER_LPM        (1 << 11)
 118
 119 #endif /* UFS_QUIRKS_H_ */