Re: [RFC PATCH V3 09/21] mmc: sdhci: add UHS-II related definitions in headers

From: Adrian Hunter
Date: Wed Sep 16 2020 - 02:46:28 EST

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On 15/09/20 9:47 am, AKASHI Takahiro wrote:
> Adrian,
>
> On Fri, Aug 21, 2020 at 05:04:16PM +0300, Adrian Hunter wrote:
>> On 10/07/20 2:10 pm, Ben Chuang wrote:
>>> From: AKASHI Takahiro <takahiro.akashi@xxxxxxxxxx>
>>>
>>> Add UHS-II related definitions in shdci.h and sdhci-uhs2.h.
>>>
>>> Signed-off-by: Ben Chuang <ben.chuang@xxxxxxxxxxxxxxxxxxx>
>>> Signed-off-by: AKASHI Takahiro <takahiro.akashi@xxxxxxxxxx>
>>> ---
>>> drivers/mmc/host/sdhci-uhs2.h | 215 ++++++++++++++++++++++++++++++++++
>>> drivers/mmc/host/sdhci.h | 91 +++++++++++++-
>>> 2 files changed, 305 insertions(+), 1 deletion(-)
>>> create mode 100644 drivers/mmc/host/sdhci-uhs2.h
>>>
>>> diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h
>>> new file mode 100644
>>> index 000000000000..a7f53f95d69a
>>> --- /dev/null
>>> +++ b/drivers/mmc/host/sdhci-uhs2.h
>>> @@ -0,0 +1,215 @@
>>> +/* SPDX-License-Identifier: GPL-2.0-or-later */
>>> +/*
>>> + * linux/drivers/mmc/host/sdhci-uhs2.h - Secure Digital Host Controller
>>> + * Interface driver
>>> + *
>>> + * Header file for Host Controller UHS2 related registers and I/O accessors.
>>> + *
>>> + * Copyright (C) 2014 Intel Corp, All Rights Reserved.
>>> + */
>>> +#ifndef __SDHCI_UHS2_H
>>> +#define __SDHCI_UHS2_H
>>> +
>>> +#include <linux/mmc/host.h>
>>> +#include <linux/mmc/core.h>
>>> +#include <linux/mmc/uhs2.h>
>>
>> These includes should not be here unless this file needs them, which doesn't
>> look like it.
>
> Okay.
>
>> Wouldn't hurt to make use of BIT and GENMASK macros since this is a new file.
>
> Will try to convert all.
>
>>> +
>>> +/*
>>> + * UHS-II Controller registers
>>> + * 0x74 preset in sdhci.h
>>> + * 0x80
>>> + * 0x84-0xB4
>>> + * 0xB8-0xCF
>>> + * 0xE0-0xE7
>>> + */
>>> +/* UHS2 */
>>> +#define SDHCI_UHS2_BLOCK_SIZE 0x80
>>> +#define SDHCI_UHS2_MAKE_BLKSZ(dma, blksz) \
>>> + ((((dma) & 0x7) << 12) | ((blksz) & 0xFFF))
>>> +
>>> +#define SDHCI_UHS2_BLOCK_COUNT 0x84
>>> +
>>> +#define SDHCI_UHS2_CMD_PACKET 0x88
>>> +#define SDHCI_UHS2_CMD_PACK_MAX_LEN 20
>>> +
>>> +#define SDHCI_UHS2_TRANS_MODE 0x9C
>>> +#define SDHCI_UHS2_TRNS_DMA 0x0001
>>> +#define SDHCI_UHS2_TRNS_BLK_CNT_EN 0x0002
>>> +#define SDHCI_UHS2_TRNS_DATA_TRNS_WRT 0x0010
>>> +#define SDHCI_UHS2_TRNS_BLK_BYTE_MODE 0x0020
>>> +#define SDHCI_UHS2_TRNS_RES_R5 0x0040
>>> +#define SDHCI_UHS2_TRNS_RES_ERR_CHECK_EN 0x0080
>>> +#define SDHCI_UHS2_TRNS_RES_INT_DIS 0x0100
>>> +#define SDHCI_UHS2_TRNS_WAIT_EBSY 0x4000
>>> +#define SDHCI_UHS2_TRNS_2L_HD 0x8000
>>> +
>>> +#define SDHCI_UHS2_COMMAND 0x9E
>>> +#define SDHCI_UHS2_COMMAND_SUB_CMD 0x0004
>>> +#define SDHCI_UHS2_COMMAND_DATA 0x0020
>>> +#define SDHCI_UHS2_COMMAND_TRNS_ABORT 0x0040
>>> +#define SDHCI_UHS2_COMMAND_CMD12 0x0080
>>> +#define SDHCI_UHS2_COMMAND_DORMANT 0x00C0
>>> +#define SDHCI_UHS2_COMMAND_PACK_LEN_MASK 0x1F00
>>> +#define SDHCI_UHS2_COMMAND_PACK_LEN_SHIFT 8
>>> +
>>> +#define SDHCI_UHS2_RESPONSE 0xA0
>>> +#define SDHCI_UHS2_RESPONSE_MAX_LEN 20
>>> +
>>> +#define SDHCI_UHS2_MSG_SELECT 0xB4
>>> +#define SDHCI_UHS2_MSG_SELECT_CURR 0x0
>>> +#define SDHCI_UHS2_MSG_SELECT_ONE 0x1
>>> +#define SDHCI_UHS2_MSG_SELECT_TWO 0x2
>>> +#define SDHCI_UHS2_MSG_SELECT_THREE 0x3
>>> +
>>> +#define SDHCI_UHS2_MSG 0xB8
>>> +
>>> +#define SDHCI_UHS2_DEV_INT_STATUS 0xBC
>>> +
>>> +#define SDHCI_UHS2_DEV_SELECT 0xBE
>>> +#define SDHCI_UHS2_DEV_SELECT_DEV_SEL_MASK 0x0F
>>> +#define SDHCI_UHS2_DEV_SELECT_INT_MSG_EN 0x80
>>> +
>>> +#define SDHCI_UHS2_DEV_INT_CODE 0xBF
>>> +
>>> +#define SDHCI_UHS2_SW_RESET 0xC0
>>> +#define SDHCI_UHS2_SW_RESET_FULL 0x0001
>>> +#define SDHCI_UHS2_SW_RESET_SD 0x0002
>>> +
>>> +#define SDHCI_UHS2_TIMER_CTRL 0xC2
>>> +#define SDHCI_UHS2_TIMER_CTRL_DEADLOCK_SHIFT 4
>>> +
>>> +#define SDHCI_UHS2_ERR_INT_STATUS 0xC4
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_EN 0xC8
>>> +#define SDHCI_UHS2_ERR_INT_SIG_EN 0xCC
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_HEADER 0x00000001
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_RES 0x00000002
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_RETRY_EXP 0x00000004
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_CRC 0x00000008
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_FRAME 0x00000010
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_TID 0x00000020
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_UNRECOVER 0x00000080
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_EBUSY 0x00000100
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_ADMA 0x00008000
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_RES_TIMEOUT 0x00010000
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_DEADLOCK_TIMEOUT 0x00020000
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_VENDOR 0x08000000
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_MASK \
>>> + (SDHCI_UHS2_ERR_INT_STATUS_HEADER | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_RES | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_RETRY_EXP | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_CRC | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_FRAME | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_TID | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_UNRECOVER | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_EBUSY | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_ADMA | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_RES_TIMEOUT | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_DEADLOCK_TIMEOUT)
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_CMD_MASK \
>>> + (SDHCI_UHS2_ERR_INT_STATUS_HEADER | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_RES | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_FRAME | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_TID | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_RES_TIMEOUT)
>>> +/* CRC Error occurs during a packet receiving */
>>> +#define SDHCI_UHS2_ERR_INT_STATUS_DATA_MASK \
>>> + (SDHCI_UHS2_ERR_INT_STATUS_RETRY_EXP | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_CRC | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_UNRECOVER | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_EBUSY | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_ADMA | \
>>> + SDHCI_UHS2_ERR_INT_STATUS_DEADLOCK_TIMEOUT)
>>> +
>>> +#define SDHCI_UHS2_SET_PTR 0xE0
>>> +#define SDHCI_UHS2_GEN_SET_POWER_LOW 0x0001
>>> +#define SDHCI_UHS2_GEN_SET_N_LANES_POS 8
>>> +#define SDHCI_UHS2_GEN_SET_2L_FD_HD 0x0
>>> +#define SDHCI_UHS2_GEN_SET_2D1U_FD 0x2
>>> +#define SDHCI_UHS2_GEN_SET_1D2U_FD 0x3
>>> +#define SDHCI_UHS2_GEN_SET_2D2U_FD 0x4
>>> +
>>> +#define SDHCI_UHS2_PHY_SET_SPEED_POS 6
>>> +#define SDHCI_UHS2_PHY_SET_HIBER_EN 0x00008000
>>> +#define SDHCI_UHS2_PHY_SET_N_LSS_SYN_MASK 0x000F0000
>>> +#define SDHCI_UHS2_PHY_SET_N_LSS_SYN_POS 16
>>> +#define SDHCI_UHS2_PHY_SET_N_LSS_DIR_MASK 0x00F00000
>>> +#define SDHCI_UHS2_PHY_SET_N_LSS_DIR_POS 20
>>> +
>>> +#define SDHCI_UHS2_TRAN_SET_N_FCU_MASK 0x0000FF00
>>> +#define SDHCI_UHS2_TRAN_SET_N_FCU_POS 8
>>> +#define SDHCI_UHS2_TRAN_SET_RETRY_CNT_MASK 0x00030000
>>> +#define SDHCI_UHS2_TRAN_SET_RETRY_CNT_POS 16
>>> +
>>> +#define SDHCI_UHS2_TRAN_SET_1_N_DAT_GAP_MASK 0x000000FF
>>> +
>>> +#define SDHCI_UHS2_HOST_CAPS_PTR 0xE2
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_OFFSET 0
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_DAP_MASK 0x0000000F
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_GAP_MASK 0x000000F0
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_GAP(gap) ((gap) * 360)
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_GAP_SHIFT 4
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_LANE_MASK 0x00003F00
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_LANE_SHIFT 8
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_2L_HD_FD 1
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_2D1U_FD 2
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_1D2U_FD 4
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_2D2U_FD 8
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_ADDR_64 0x00004000
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_BOOT 0x00008000
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_DEV_TYPE_MASK 0x00030000
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_DEV_TYPE_SHIFT 16
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_DEV_TYPE_RMV 0
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_DEV_TYPE_EMB 1
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_DEV_TYPE_EMB_RMV 2
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_NUM_DEV_MASK 0x003C0000
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_NUM_DEV_SHIFT 18
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_BUS_TOPO_MASK 0x00C00000
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_BUS_TOPO_SHIFT 22
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_BUS_TOPO_P2P 0
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_BUS_TOPO_RING 1
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_BUS_TOPO_HUB 2
>>> +#define SDHCI_UHS2_HOST_CAPS_GEN_BUS_TOPO_HUB_RING 3
>>> +
>>> +#define SDHCI_UHS2_HOST_CAPS_PHY_OFFSET 4
>>> +#define SDHCI_UHS2_HOST_CAPS_PHY_REV_MASK 0x0000003F
>>> +#define SDHCI_UHS2_HOST_CAPS_PHY_RANGE_MASK 0x000000C0
>>> +#define SDHCI_UHS2_HOST_CAPS_PHY_RANGE_SHIFT 6
>>> +#define SDHCI_UHS2_HOST_CAPS_PHY_RANGE_A 0
>>> +#define SDHCI_UHS2_HOST_CAPS_PHY_RANGE_B 1
>>> +#define SDHCI_UHS2_HOST_CAPS_PHY_N_LSS_SYN_MASK 0x000F0000
>>> +#define SDHCI_UHS2_HOST_CAPS_PHY_N_LSS_SYN_SHIFT 16
>>> +#define SDHCI_UHS2_HOST_CAPS_PHY_N_LSS_DIR_MASK 0x00F00000
>>> +#define SDHCI_UHS2_HOST_CAPS_PHY_N_LSS_DIR_SHIFT 20
>>> +#define SDHCI_UHS2_HOST_CAPS_TRAN_OFFSET 8
>>> +#define SDHCI_UHS2_HOST_CAPS_TRAN_LINK_REV_MASK 0x0000003F
>>> +#define SDHCI_UHS2_HOST_CAPS_TRAN_N_FCU_MASK 0x0000FF00
>>> +#define SDHCI_UHS2_HOST_CAPS_TRAN_N_FCU_SHIFT 8
>>> +#define SDHCI_UHS2_HOST_CAPS_TRAN_HOST_TYPE_MASK 0x00070000
>>> +#define SDHCI_UHS2_HOST_CAPS_TRAN_HOST_TYPE_SHIFT 16
>>> +#define SDHCI_UHS2_HOST_CAPS_TRAN_BLK_LEN_MASK 0xFFF00000
>>> +#define SDHCI_UHS2_HOST_CAPS_TRAN_BLK_LEN_SHIFT 20
>>> +
>>> +#define SDHCI_UHS2_HOST_CAPS_TRAN_1_OFFSET 12
>>> +#define SDHCI_UHS2_HOST_CAPS_TRAN_1_N_DATA_GAP_MASK 0x000000FF
>>> +
>>> +#define SDHCI_UHS2_TEST_PTR 0xE4
>>> +#define SDHCI_UHS2_TEST_ERR_HEADER 0x00000001
>>> +#define SDHCI_UHS2_TEST_ERR_RES 0x00000002
>>> +#define SDHCI_UHS2_TEST_ERR_RETRY_EXP 0x00000004
>>> +#define SDHCI_UHS2_TEST_ERR_CRC 0x00000008
>>> +#define SDHCI_UHS2_TEST_ERR_FRAME 0x00000010
>>> +#define SDHCI_UHS2_TEST_ERR_TID 0x00000020
>>> +#define SDHCI_UHS2_TEST_ERR_UNRECOVER 0x00000080
>>> +#define SDHCI_UHS2_TEST_ERR_EBUSY 0x00000100
>>> +#define SDHCI_UHS2_TEST_ERR_ADMA 0x00008000
>>> +#define SDHCI_UHS2_TEST_ERR_RES_TIMEOUT 0x00010000
>>> +#define SDHCI_UHS2_TEST_ERR_DEADLOCK_TIMEOUT 0x00020000
>>> +#define SDHCI_UHS2_TEST_ERR_VENDOR 0x08000000
>>> +
>>> +#define SDHCI_UHS2_EMBED_CTRL 0xE6
>>> +#define SDHCI_UHS2_VENDOR 0xE8
>>> +
>>> +void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask);
>>> +void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set);
>>> +
>>> +#endif /* __SDHCI_UHS2_H */
>>> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
>>> index 0008bbd27127..ecf55394ea46 100644
>>> --- a/drivers/mmc/host/sdhci.h
>>> +++ b/drivers/mmc/host/sdhci.h
>>> @@ -43,8 +43,27 @@
>>> #define SDHCI_TRNS_READ 0x10
>>> #define SDHCI_TRNS_MULTI 0x20
>>>
>>> +/*
>>> + * Defined in Host Version 4.10.
>>> + * 1 - R5 (SDIO)
>>> + * 0 - R1 (Memory)
>>> + */
>>> +#define SDHCI_TRNS_RES_TYPE 0x40
>>> +#define SDHCI_TRNS_RES_ERR_CHECK 0x80
>>> +#define SDHCI_TRNS_RES_INT_DIS 0x0100
>>> +
>>> #define SDHCI_COMMAND 0x0E
>>> #define SDHCI_CMD_RESP_MASK 0x03
>>> +
>>> +/*
>>> + * Host Version 4.10 adds this bit to distinguish a main command or
>>> + * sub command.
>>> + * CMD53(SDIO) - main command
>>> + * CMD52(SDIO) - sub command which doesn't have data block or doesn't
>>> + * indicate busy.
>>> + */
>>> +#define SDHCI_CMD_SUB_CMD 0x04
>>> +
>>> #define SDHCI_CMD_CRC 0x08
>>> #define SDHCI_CMD_INDEX 0x10
>>> #define SDHCI_CMD_DATA 0x20
>>> @@ -60,11 +79,19 @@
>>>
>>> #define SDHCI_RESPONSE 0x10
>>>
>>> +#define SDHCI_RESPONSE_CM_TRAN_ABORT_OFFSET 0x10
>>> +#define SDHCI_RESPONSE_CM_TRAN_ABORT_SIZE 4
>>> +#define SDHCI_RESPONSE_SD_TRAN_ABORT_OFFSET 0x18
>>> +#define SDHCI_RESPONSE_SD_TRAN_ABORT_SIZE 8
>>> +
>>> #define SDHCI_BUFFER 0x20
>>>
>>> #define SDHCI_PRESENT_STATE 0x24
>>> #define SDHCI_CMD_INHIBIT 0x00000001
>>> #define SDHCI_DATA_INHIBIT 0x00000002
>>> +
>>> +#define SDHCI_DATA_HIGH_LVL_MASK 0x000000F0
>>> +
>>> #define SDHCI_DOING_WRITE 0x00000100
>>> #define SDHCI_DOING_READ 0x00000200
>>> #define SDHCI_SPACE_AVAILABLE 0x00000400
>>> @@ -80,6 +107,13 @@
>>> #define SDHCI_DATA_0_LVL_MASK 0x00100000
>>> #define SDHCI_CMD_LVL 0x01000000
>>>
>>> +#define SDHCI_HOST_REGULATOR_STABLE 0x02000000
>>> +#define SDHCI_CMD_NOT_ISSUE_ERR 0x08000000
>>> +#define SDHCI_SUB_CMD_STATUS 0x10000000
>>> +#define SDHCI_UHS2_IN_DORMANT_STATE 0x20000000
>>> +#define SDHCI_UHS2_LANE_SYNC 0x40000000
>>> +#define SDHCI_UHS2_IF_DETECT 0x80000000
>>> +
>>> #define SDHCI_HOST_CONTROL 0x28
>>> #define SDHCI_CTRL_LED 0x01
>>> #define SDHCI_CTRL_4BITBUS 0x02
>>> @@ -100,6 +134,11 @@
>>> #define SDHCI_POWER_300 0x0C
>>> #define SDHCI_POWER_330 0x0E
>>>
>>> +/* VDD2 - UHS2 */
>>> +#define SDHCI_VDD2_POWER_ON 0x10
>>> +#define SDHCI_VDD2_POWER_180 0xA0
>>> +#define SDHCI_VDD2_POWER_120 0x80
>>> +
>>> #define SDHCI_BLOCK_GAP_CONTROL 0x2A
>>>
>>> #define SDHCI_WAKE_UP_CONTROL 0x2B
>>> @@ -110,7 +149,7 @@
>>> #define SDHCI_CLOCK_CONTROL 0x2C
>>> #define SDHCI_DIVIDER_SHIFT 8
>>> #define SDHCI_DIVIDER_HI_SHIFT 6
>>> -#define SDHCI_DIV_MASK 0xFF
>>> +#define SDHCI_DIV_MASK 0xFF
>>> #define SDHCI_DIV_MASK_LEN 8
>>> #define SDHCI_DIV_HI_MASK 0x300
>>> #define SDHCI_PROG_CLOCK_MODE 0x0020
>>> @@ -139,6 +178,10 @@
>>> #define SDHCI_INT_CARD_REMOVE 0x00000080
>>> #define SDHCI_INT_CARD_INT 0x00000100
>>> #define SDHCI_INT_RETUNE 0x00001000
>>> +
>>> +/* Host Version 4.10 */
>>> +#define SDHCI_INT_FX_EVENT 0x00002000
>>> +
>>> #define SDHCI_INT_CQE 0x00004000
>>> #define SDHCI_INT_ERROR 0x00008000
>>> #define SDHCI_INT_TIMEOUT 0x00010000
>>> @@ -152,6 +195,9 @@
>>> #define SDHCI_INT_AUTO_CMD_ERR 0x01000000
>>> #define SDHCI_INT_ADMA_ERROR 0x02000000
>>>
>>> +/* Host Version 4.0 */
>>> +#define SDHCI_INT_RESPONSE_ERROR 0x08000000
>>> +
>>> #define SDHCI_INT_NORMAL_MASK 0x00007FFF
>>> #define SDHCI_INT_ERROR_MASK 0xFFFF8000
>>>
>>> @@ -178,6 +224,9 @@
>>> #define SDHCI_AUTO_CMD_END_BIT 0x00000008
>>> #define SDHCI_AUTO_CMD_INDEX 0x00000010
>>>
>>> +/* Host Version 4.10 */
>>> +#define SDHCI_ACMD_RESPONSE_ERROR 0x0020
>>> +
>>> #define SDHCI_HOST_CONTROL2 0x3E
>>> #define SDHCI_CTRL_UHS_MASK 0x0007
>>> #define SDHCI_CTRL_UHS_SDR12 0x0000
>>> @@ -186,6 +235,7 @@
>>> #define SDHCI_CTRL_UHS_SDR104 0x0003
>>> #define SDHCI_CTRL_UHS_DDR50 0x0004
>>> #define SDHCI_CTRL_HS400 0x0005 /* Non-standard */
>>> +#define SDHCI_CTRL_UHS_2 0x0007 /* UHS-2 */
>>> #define SDHCI_CTRL_VDD_180 0x0008
>>> #define SDHCI_CTRL_DRV_TYPE_MASK 0x0030
>>> #define SDHCI_CTRL_DRV_TYPE_B 0x0000
>>> @@ -194,9 +244,12 @@
>>> #define SDHCI_CTRL_DRV_TYPE_D 0x0030
>>> #define SDHCI_CTRL_EXEC_TUNING 0x0040
>>> #define SDHCI_CTRL_TUNED_CLK 0x0080
>>> +#define SDHCI_CTRL_UHS2_INTERFACE_EN 0x0100 /* UHS-2 */
>>> +#define SDHCI_CTRL_ADMA2_LEN_MODE 0x0400
>>> #define SDHCI_CMD23_ENABLE 0x0800
>>> #define SDHCI_CTRL_V4_MODE 0x1000
>>> #define SDHCI_CTRL_64BIT_ADDR 0x2000
>>> +#define SDHCI_CTRL_ASYNC_INT_EN 0x4000
>>> #define SDHCI_CTRL_PRESET_VAL_ENABLE 0x8000
>>>
>>> #define SDHCI_CAPABILITIES 0x40
>>> @@ -217,11 +270,13 @@
>>> #define SDHCI_CAN_VDD_180 0x04000000
>>> #define SDHCI_CAN_64BIT_V4 0x08000000
>>> #define SDHCI_CAN_64BIT 0x10000000
>>> +#define SDHCI_CAN_ASYNC_INT 0x20000000
>>>
>>> #define SDHCI_CAPABILITIES_1 0x44
>>> #define SDHCI_SUPPORT_SDR50 0x00000001
>>> #define SDHCI_SUPPORT_SDR104 0x00000002
>>> #define SDHCI_SUPPORT_DDR50 0x00000004
>>> +#define SDHCI_SUPPORT_UHS2 0x00000008 /* UHS-2 support */
>>> #define SDHCI_DRIVER_TYPE_A 0x00000010
>>> #define SDHCI_DRIVER_TYPE_C 0x00000020
>>> #define SDHCI_DRIVER_TYPE_D 0x00000040
>>> @@ -230,19 +285,28 @@
>>> #define SDHCI_RETUNING_MODE_MASK GENMASK(15, 14)
>>> #define SDHCI_CLOCK_MUL_MASK GENMASK(23, 16)
>>> #define SDHCI_CAN_DO_ADMA3 0x08000000
>>> +#define SDHCI_SUPPORT_VDD2_180 0x10000000 /* UHS-2 1.8V VDD2 */
>>> +#define SDHCI_RSVD_FOR_VDD2 0x20000000 /* Rsvd for future VDD2 */
>>> #define SDHCI_SUPPORT_HS400 0x80000000 /* Non-standard */
>>>
>>> #define SDHCI_MAX_CURRENT 0x48
>>> +#define SDHCI_MAX_CURRENT_1 0x4C
>>> #define SDHCI_MAX_CURRENT_LIMIT GENMASK(7, 0)
>>> #define SDHCI_MAX_CURRENT_330_MASK GENMASK(7, 0)
>>> #define SDHCI_MAX_CURRENT_300_MASK GENMASK(15, 8)
>>> #define SDHCI_MAX_CURRENT_180_MASK GENMASK(23, 16)
>>> +#define SDHCI_MAX_CURRENT_VDD2_180_MASK GENMASK(7, 0) /* UHS2 */
>>> #define SDHCI_MAX_CURRENT_MULTIPLIER 4
>>>
>>> /* 4C-4F reserved for more max current */
>>>
>>> #define SDHCI_SET_ACMD12_ERROR 0x50
>>> +/* Host Version 4.10 */
>>> +#define SDHCI_SET_ACMD_RESPONSE_ERROR 0x20
>>> #define SDHCI_SET_INT_ERROR 0x52
>>> +/* Host Version 4.10 */
>>> +#define SDHCI_SET_INT_TUNING_ERROR 0x0400
>>> +#define SDHCI_SET_INT_RESPONSE_ERROR 0x0800
>>>
>>> #define SDHCI_ADMA_ERROR 0x54
>>>
>>> @@ -259,10 +323,16 @@
>>> #define SDHCI_PRESET_FOR_SDR104 0x6C
>>> #define SDHCI_PRESET_FOR_DDR50 0x6E
>>> #define SDHCI_PRESET_FOR_HS400 0x74 /* Non-standard */
>>> +
>>> +/* TODO: 0x74 is used for UHS2 in 4.10. How about HS400? */
>>> +/* UHS2 */
>>> +#define SDHCI_PRESET_FOR_UHS2 0x74
>>> #define SDHCI_PRESET_DRV_MASK GENMASK(15, 14)
>>> #define SDHCI_PRESET_CLKGEN_SEL BIT(10)
>>> #define SDHCI_PRESET_SDCLK_FREQ_MASK GENMASK(9, 0)
>>>
>>> +#define SDHCI_ADMA3_ADDRESS 0x78
>>> +
>>> #define SDHCI_SLOT_INT_STATUS 0xFC
>>>
>>> #define SDHCI_HOST_VERSION 0xFE
>>> @@ -653,6 +723,25 @@ struct sdhci_ops {
>>> void (*dump_vendor_regs)(struct sdhci_host *host);
>>> };
>>>
>>> +struct sdhci_uhs2_ops {
>>> + /* UHS-2 support */
>>> + void (*reset)(struct sdhci_host *host, u16 mask);
>>> + void (*set_timeout)(struct sdhci_host *host);
>>> + void (*set_transfer_mode)(struct sdhci_host *host,
>>> + struct mmc_command *cmd);
>>> + void (*send_command)(struct sdhci_host *host,
>>> + struct mmc_command *cmd);
>>> + void (*finish_command)(struct sdhci_host *host);
>>> + void (*do_set_ios)(struct sdhci_host *host, struct mmc_ios *ios);
>>> + int (*do_detect_init)(struct sdhci_host *host);
>>> + int (*do_set_reg)(struct sdhci_host *host, enum uhs2_act act);
>>> + void (*irq)(struct sdhci_host *host);
>>> + int (*add_host)(struct sdhci_host *host, u32 caps1);
>>> + void (*remove_host)(struct sdhci_host *host, int dead);
>>> +};
>>
>> Instead of this structure, please just add functions to sdhci_ops.
>
> I think that one of your requirements is to purge all uhs2-related
> code from sdhci.c and that the structure above meets it.
>
> But I will try to move them to struct sdhci_ops if you really want.

Sorry if it seems like a pain, but yes please.

>
> -Takahiro Akashi
>
>>> +
>>> +extern struct sdhci_uhs2_ops sdhci_uhs2_ops;
>>> +
>>> #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
>>>
>>> static inline void sdhci_writel(struct sdhci_host *host, u32 val, int reg)
>>>
>>

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