1 /* Copyright (c) 2014-2017, The Linux Foundation. All rights reserved.
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
14 #ifndef _UFS_QUIRKS_H_
15 #define _UFS_QUIRKS_H_
17 /* return true if s1 is a prefix of s2 */
18 #define STR_PRFX_EQUAL(s1, s2) !strncmp(s1, s2, strlen(s1))
20 #define UFS_ANY_VENDOR -1
21 #define UFS_ANY_MODEL "ANY_MODEL"
23 #define MAX_MODEL_LEN 16
25 #define UFS_VENDOR_TOSHIBA 0x198
26 #define UFS_VENDOR_SAMSUNG 0x1CE
27 #define UFS_VENDOR_HYNIX 0x1AD
29 /* UFS TOSHIBA MODELS */
30 #define UFS_MODEL_TOSHIBA_32GB "THGLF2G8D4KBADR"
31 #define UFS_MODEL_TOSHIBA_64GB "THGLF2G9D8KBADG"
34 * ufs_card_info - ufs device details
35 * @wmanufacturerid: card details
38 struct ufs_card_info {
44 * ufs_card_fix - ufs device quirk info
45 * @card: ufs card details
46 * @quirk: device quirk
49 struct ufs_card_info card;
53 #define END_FIX { { 0 } , 0 }
55 /* add specific device quirk */
56 #define UFS_FIX(_vendor, _model, _quirk) \
58 .card.wmanufacturerid = (_vendor),\
59 .card.model = (_model), \
64 * If UFS device is having issue in processing LCC (Line Control
65 * Command) coming from UFS host controller then enable this quirk.
66 * When this quirk is enabled, host controller driver should disable
67 * the LCC transmission on UFS host controller (by clearing
68 * TX_LCC_ENABLE attribute of host to 0).
70 #define UFS_DEVICE_QUIRK_BROKEN_LCC (1 << 0)
73 * Some UFS devices don't need VCCQ rail for device operations. Enabling this
74 * quirk for such devices will make sure that VCCQ rail is not voted.
76 #define UFS_DEVICE_NO_VCCQ (1 << 1)
79 * Some vendor's UFS device sends back to back NACs for the DL data frames
80 * causing the host controller to raise the DFES error status. Sometimes
81 * such UFS devices send back to back NAC without waiting for new
82 * retransmitted DL frame from the host and in such cases it might be possible
83 * the Host UniPro goes into bad state without raising the DFES error
84 * interrupt. If this happens then all the pending commands would timeout
85 * only after respective SW command (which is generally too large).
87 * We can workaround such device behaviour like this:
88 * - As soon as SW sees the DL NAC error, it should schedule the error handler
89 * - Error handler would sleep for 50ms to see if there are any fatal errors
90 * raised by UFS controller.
91 * - If there are fatal errors then SW does normal error recovery.
92 * - If there are no fatal errors then SW sends the NOP command to device
93 * to check if link is alive.
94 * - If NOP command times out, SW does normal error recovery
95 * - If NOP command succeed, skip the error handling.
97 * If DL NAC error is seen multiple times with some vendor's UFS devices then
98 * enable this quirk to initiate quick error recovery and also silence related
99 * error logs to reduce spamming of kernel logs.
101 #define UFS_DEVICE_QUIRK_RECOVERY_FROM_DL_NAC_ERRORS (1 << 2)
104 * Some UFS devices may not work properly after resume if the link was kept
105 * in off state during suspend. Enabling this quirk will not allow the
106 * link to be kept in off state during suspend.
108 #define UFS_DEVICE_QUIRK_NO_LINK_OFF (1 << 3)
111 * Few Toshiba UFS device models advertise RX_MIN_ACTIVATETIME_CAPABILITY as
112 * 600us which may not be enough for reliable hibern8 exit hardware sequence
114 * To workaround this issue, host should set its PA_TACTIVATE time to 1ms even
115 * if device advertises RX_MIN_ACTIVATETIME_CAPABILITY less than 1ms.
117 #define UFS_DEVICE_QUIRK_PA_TACTIVATE (1 << 4)
120 * Some UFS memory devices may have really low read/write throughput in
121 * FAST AUTO mode, enable this quirk to make sure that FAST AUTO mode is
122 * never enabled for such devices.
124 #define UFS_DEVICE_NO_FASTAUTO (1 << 5)
127 * Some UFS devices require host PA_TACTIVATE to be lower than device
128 * PA_TACTIVATE, enabling this quirk ensure this.
130 #define UFS_DEVICE_QUIRK_HOST_PA_TACTIVATE (1 << 6)
133 * The max. value PA_SaveConfigTime is 250 (10us) but this is not enough for
135 * Gear switch from PWM to HS may fail even with this max. PA_SaveConfigTime.
136 * Gear switch can be issued by host controller as an error recovery and any
137 * software delay will not help on this case so we need to increase
138 * PA_SaveConfigTime to >32us as per vendor recommendation.
140 #define UFS_DEVICE_QUIRK_HOST_PA_SAVECONFIGTIME (1 << 7)
143 * Some UFS devices may stop responding after switching from HS-G1 to HS-G3.
144 * Also, it is found that these devices work fine if we do 2 steps switch:
145 * HS-G1 to HS-G2 followed by HS-G2 to HS-G3. Enabling this quirk for such
146 * device would apply this 2 steps gear switch workaround.
148 #define UFS_DEVICE_QUIRK_HS_G1_TO_HS_G3_SWITCH (1 << 8)
151 void ufs_advertise_fixup_device(struct ufs_hba *hba);
152 #endif /* UFS_QUIRKS_H_ */