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    Subject[RFC PATCH v3.2 29/29] mmc: core: Apply Ulf's patch for supporting UHS-II card
    Date
    1. mmc: core: core.c: Modify definition name from MMC_TIMING_UHS2 to MMC_TIMING_SD_UHS2.
    2. mmc: core: bus.c: Apply Ulf's coding style to function mmc_add_card().
    3. mmc: core: sd_uhs2.c: Move functions from uhs2.c to corespondding functions in sd_uhs2.c and remove uhs2.c from kernel source code.

    Signed-off-by: Jason Lai <jason.lai@genesyslogic.com.tw>
    ---
    drivers/mmc/core/Makefile | 2 +-
    drivers/mmc/core/core.c | 2 +-
    drivers/mmc/core/sd.c | 2 +-
    drivers/mmc/core/sd.h | 1 +
    drivers/mmc/core/sd_uhs2.c | 1157 ++++++++++++++++++++++++++++++++++++
    drivers/mmc/core/uhs2.h | 1 +
    drivers/mmc/host/sdhci-uhs2.c | 5 +++++
    include/linux/mmc/uhs2.h | 1 +
    8 files changed, 1171 insertions(+), 3 deletions(-)
    create mode 100644 drivers/mmc/core/sd_uhs2.c

    diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile
    index 3d3a55bc7e45..10f1c3ca5e4a 100644
    --- a/drivers/mmc/core/Makefile
    +++ b/drivers/mmc/core/Makefile
    @@ -8,7 +8,7 @@ mmc_core-y := core.o bus.o host.o \
    mmc.o mmc_ops.o sd.o sd_ops.o \
    sdio.o sdio_ops.o sdio_bus.o \
    sdio_cis.o sdio_io.o sdio_irq.o \
    - slot-gpio.o regulator.o uhs2.o
    + slot-gpio.o regulator.o sd_uhs2.o
    mmc_core-$(CONFIG_OF) += pwrseq.o
    obj-$(CONFIG_PWRSEQ_SIMPLE) += pwrseq_simple.o
    obj-$(CONFIG_PWRSEQ_SD8787) += pwrseq_sd8787.o
    diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
    index 9413dea60612..2624d7b30cd2 100644
    --- a/drivers/mmc/core/core.c
    +++ b/drivers/mmc/core/core.c
    @@ -1349,7 +1349,7 @@ void mmc_power_up(struct mmc_host *host, u32 ocr)
    host->ios.chip_select = MMC_CS_HIGH;
    else
    host->ios.chip_select = MMC_CS_DONTCARE;
    - host->ios.timing = MMC_TIMING_SD_UHS2;
    + host->ios.timing = MMC_TIMING_UHS2;
    } else {
    mmc_pwrseq_pre_power_on(host);

    diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
    index f984d5a9301a..93e741e3b5a3 100644
    --- a/drivers/mmc/core/sd.c
    +++ b/drivers/mmc/core/sd.c
    @@ -1014,7 +1014,7 @@ static bool mmc_sd_card_using_v18(struct mmc_card *card)
    * In the case of a resume, "oldcard" will contain the card
    * we're trying to reinitialise.
    */
    -static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
    +int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
    struct mmc_card *oldcard)
    {
    struct mmc_card *card;
    diff --git a/drivers/mmc/core/sd.h b/drivers/mmc/core/sd.h
    index 1af5a038bae9..4fbd990d33e5 100644
    --- a/drivers/mmc/core/sd.h
    +++ b/drivers/mmc/core/sd.h
    @@ -9,6 +9,7 @@ extern struct device_type sd_type;
    struct mmc_host;
    struct mmc_card;

    +int mmc_sd_init_card(struct mmc_host *host, u32 ocr, struct mmc_card *oldcard);
    int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr);
    int mmc_sd_get_csd(struct mmc_card *card);
    void mmc_decode_cid(struct mmc_card *card);
    diff --git a/drivers/mmc/core/sd_uhs2.c b/drivers/mmc/core/sd_uhs2.c
    new file mode 100644
    index 000000000000..55853202cbea
    --- /dev/null
    +++ b/drivers/mmc/core/sd_uhs2.c
    @@ -0,0 +1,1157 @@
    +// SPDX-License-Identifier: GPL-2.0-only
    +/*
    + * Copyright (C) 2021 Linaro Ltd
    + *
    + * Author: Ulf Hansson <ulf.hansson@linaro.org>
    + *
    + * Support for SD UHS-II cards
    + */
    +#include <asm/byteorder.h>
    +#include <linux/err.h>
    +#include <linux/slab.h>
    +
    +#include <linux/mmc/host.h>
    +#include <linux/mmc/card.h>
    +#include <linux/mmc/mmc.h>
    +#include <linux/mmc/core.h>
    +#include <linux/mmc/sdio.h>
    +#include <linux/mmc/slot-gpio.h>
    +#include <linux/mmc/uhs2.h>
    +
    +#include "core.h"
    +#include "bus.h"
    +#include "sd_ops.h"
    +#include "sd.h"
    +#include "mmc_ops.h"
    +#include "uhs2.h"
    +
    +#define DBG(f, x...) \
    + pr_warn("[%s()]: " f, __func__, ## x)
    +
    +//static const unsigned int sd_uhs2_freqs[] = { 52000000, 26000000 };
    +
    +/* This function is part of sdhci_uhs2_set_ios() in sdhci-uhs2.c
    +static int sd_uhs2_set_ios(struct mmc_host *host)
    +{
    + struct mmc_ios *ios = &host->ios;
    +
    + return host->ops->uhs2_set_ios(host, ios);
    +}
    +*/
    +
    +/* This function is part of mmc_power_up() in core.c
    +static int sd_uhs2_power_up(struct mmc_host *host)
    +{
    + host->ios.vdd = fls(host->ocr_avail) - 1;
    + host->ios.clock = host->f_init;
    + host->ios.timing = MMC_TIMING_SD_UHS2;
    + host->ios.power_mode = MMC_POWER_UP;
    +
    + return sd_uhs2_set_ios(host);
    +}*/
    +
    +/* This function is part of mmc_power_off() in core.c
    +static void sd_uhs2_power_off(struct mmc_host *host)
    +{
    + host->ios.vdd = 0;
    + host->ios.clock = 0;
    + host->ios.timing = MMC_TIMING_LEGACY;
    + host->ios.power_mode = MMC_POWER_OFF;
    +
    + sd_uhs2_set_ios(host);
    +}
    +*/
    +
    +/**
    + * uhs2_cmd_assemble - assemble and build up uhs2 command
    + * @cmd: MMC command
    + * @uhs2_cmd: UHS2 command
    + * @header: Value of packet header
    + * @arg: Argument of packet
    + * @payload: Payload of packet
    + * @plen: Payload length
    + * @resp: Buffer for response
    + * @resp_len: Response buffer length
    + *
    + * resp is inputted outside which should be a variable created by caller
    + * so caller should handle it. For SD command, there is no uhs2_resp and
    + * response should be stored in resp of mmc_command.
    + */
    +static void uhs2_cmd_assemble(struct mmc_command *cmd,
    + struct uhs2_command *uhs2_cmd,
    + u16 header, u16 arg,
    + u32 *payload, u8 plen, u8 *resp, u8 resp_len)
    +{
    + uhs2_cmd->header = header;
    + uhs2_cmd->arg = arg;
    + uhs2_cmd->payload = payload;
    + uhs2_cmd->payload_len = plen * sizeof(u32);
    + uhs2_cmd->packet_len = uhs2_cmd->payload_len + 4;
    +
    + cmd->uhs2_cmd = uhs2_cmd;
    + cmd->uhs2_resp = resp;
    + cmd->uhs2_resp_len = resp_len;
    +
    + pr_debug("%s: uhs2_cmd: header=0x%x arg=0x%x\n",
    + __func__, uhs2_cmd->header, uhs2_cmd->arg);
    + pr_debug("%s: payload_len=%d packet_len=%d resp_len=%d\n",
    + __func__, uhs2_cmd->payload_len, uhs2_cmd->packet_len,
    + cmd->uhs2_resp_len);
    +}
    +
    +/*
    + * Do the early initialization of the card, by sending the device init broadcast
    + * command and wait for the process to be completed.
    + */
    +static int sd_uhs2_dev_init(struct mmc_host *host)
    +{
    + struct mmc_command cmd = {0};
    + struct uhs2_command uhs2_cmd = {};
    + u32 cnt;
    + u32 dap, gap, gap1;
    + u16 header = 0, arg = 0;
    + u32 payload[1];
    + u8 plen = 1;
    + u8 gd = 0, cf = 1;
    + u8 resp[6] = {0};
    + u8 resp_len = 6;
    + int err;
    +
    + dap = host->uhs2_caps.dap;
    + gap = host->uhs2_caps.gap;
    +
    + header = UHS2_NATIVE_PACKET | UHS2_PACKET_TYPE_CCMD;
    + arg = ((UHS2_DEV_CMD_DEVICE_INIT & 0xFF) << 8) |
    + UHS2_NATIVE_CMD_WRITE |
    + UHS2_NATIVE_CMD_PLEN_4B |
    + (UHS2_DEV_CMD_DEVICE_INIT >> 8);
    +
    + /* need this for some cards */
    + cmd.busy_timeout = 1000;
    +
    + for (cnt = 0; cnt < 30; cnt++) {
    + payload[0] = ((dap & 0xF) << 12) |
    + (cf << 11) |
    + ((gd & 0xF) << 4) |
    + (gap & 0xF);
    +
    + uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg,
    + payload, plen, resp, resp_len);
    +
    + DBG("Begin DEVICE_INIT, header=0x%x, arg=0x%x, payload=0x%x.\n",
    + header, arg, payload[0]);
    +
    + DBG("Sending DEVICE_INIT. Count = %d\n", cnt);
    + err = mmc_wait_for_cmd(host, &cmd, 0);
    +
    + if (err) {
    + pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
    + mmc_hostname(host), __func__, err);
    + return -EIO;
    + }
    +
    + if (IS_ENABLED(CONFIG_MMC_DEBUG)) {
    + int i;
    +
    + pr_warn("%s: DEVICE_INIT response is: ",
    + mmc_hostname(host));
    + for (i = 0; i < resp_len; i++)
    + pr_warn("0x%x ", resp[i]);
    + pr_warn("\n");
    + }
    +
    + if (resp[3] != (UHS2_DEV_CMD_DEVICE_INIT & 0xFF)) {
    + pr_err("%s: DEVICE_INIT response is wrong!\n",
    + mmc_hostname(host));
    + return -EIO;
    + }
    +
    + if (resp[5] & 0x8) {
    + DBG("CF is set, device is initialized!\n");
    + host->group_desc = gd;
    + break;
    + }
    + gap1 = resp[4] & 0x0F;
    + if (gap == gap1)
    + gd++;
    + }
    + if (cnt == 30) {
    + pr_err("%s: DEVICE_INIT fail, already 30 times!\n",
    + mmc_hostname(host));
    + return -EIO;
    + }
    +
    + return 0;
    +}
    +
    +/*
    + * Run the enumeration process by sending the enumerate command to the card.
    + * Note that, we currently support only the point to point connection, which
    + * means only one card can be attached per host/slot.
    + */
    +//static int sd_uhs2_enum(struct mmc_host *host, u32 *node_id) // node_id had been saved in host->uhs2_dev_prop.node_id
    +static int sd_uhs2_enum(struct mmc_host *host)
    +{
    + struct mmc_command cmd = {0};
    + struct uhs2_command uhs2_cmd = {};
    + u16 header = 0, arg = 0;
    + u32 payload[1];
    + u8 plen = 1;
    + u8 id_f = 0xF, id_l = 0x0;
    + u8 resp[8] = {0};
    + u8 resp_len = 8;
    + int err;
    +
    + header = UHS2_NATIVE_PACKET | UHS2_PACKET_TYPE_CCMD;
    + arg = ((UHS2_DEV_CMD_ENUMERATE & 0xFF) << 8) |
    + UHS2_NATIVE_CMD_WRITE |
    + UHS2_NATIVE_CMD_PLEN_4B |
    + (UHS2_DEV_CMD_ENUMERATE >> 8);
    +
    + payload[0] = (id_f << 4) | id_l;
    +
    + DBG("Begin ENUMERATE, header=0x%x, arg=0x%x, payload=0x%x.\n",
    + header, arg, payload[0]);
    + uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, plen,
    + resp, resp_len);
    +
    + err = mmc_wait_for_cmd(host, &cmd, 0);
    + if (err) {
    + pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
    + mmc_hostname(host), __func__, err);
    + return -EIO;
    + }
    +
    + if (IS_ENABLED(CONFIG_MMC_DEBUG)) {
    + int i;
    +
    + pr_warn("%s: ENUMERATE response is: ", mmc_hostname(host));
    + for (i = 0; i < resp_len; i++)
    + pr_warn("0x%x ", resp[i]);
    + pr_warn("\n");
    + }
    +
    + if (resp[3] != (UHS2_DEV_CMD_ENUMERATE & 0xFF)) {
    + pr_err("%s: ENUMERATE response is wrong!\n",
    + mmc_hostname(host));
    + return -EIO;
    + }
    +
    + id_f = (resp[4] >> 4) & 0xF;
    + id_l = resp[4] & 0xF;
    + DBG("id_f = %d, id_l = %d.\n", id_f, id_l);
    + DBG("Enumerate Cmd Completed. No. of Devices connected = %d\n",
    + id_l - id_f + 1);
    + host->uhs2_dev_prop.node_id = id_f;
    +
    + return 0;
    +}
    +
    +/*
    + * Read the UHS-II configuration registers (CFG_REG) of the card, by sending it
    + * commands and by parsing the responses. Store a copy of the relevant data in
    + * card->uhs2_config.
    + */
    +//static int sd_uhs2_config_read(struct mmc_host *host, struct mmc_card *card)
    +static int sd_uhs2_config_read(struct mmc_host *host)
    +{
    + struct mmc_command cmd = {0};
    + struct uhs2_command uhs2_cmd = {};
    + u16 header = 0, arg = 0;
    + u32 cap;
    + int err;
    +
    + DBG("INQUIRY_CFG: read Generic Caps.\n");
    + header = UHS2_NATIVE_PACKET |
    + UHS2_PACKET_TYPE_CCMD |
    + host->uhs2_dev_prop.node_id;
    + arg = ((UHS2_DEV_CONFIG_GEN_CAPS & 0xFF) << 8) |
    + UHS2_NATIVE_CMD_READ |
    + UHS2_NATIVE_CMD_PLEN_4B |
    + (UHS2_DEV_CONFIG_GEN_CAPS >> 8);
    +
    + DBG("Begin INQUIRY_CFG, header=0x%x, arg=0x%x.\n",
    + header, arg);
    + /* There is no payload because per spec, there should be
    + * no payload field for read CCMD.
    + * Plen is set in arg. Per spec, plen for read CCMD
    + * represents the len of read data which is assigned in payload
    + * of following RES (p136).
    + */
    + uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, NULL, 0, NULL, 0);
    +
    + err = mmc_wait_for_cmd(host, &cmd, 0);
    + if (err) {
    + pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
    + mmc_hostname(host), __func__, err);
    + return -EIO;
    + }
    +
    + if (IS_ENABLED(CONFIG_MMC_DEBUG)) {
    + int i;
    +
    + pr_warn("%s: INQUIRY_CFG generic response is: ",
    + mmc_hostname(host));
    + for (i = 0; i < 2; i++)
    + pr_warn("0x%x ", cmd.resp[i]);
    + pr_warn("\n");
    + }
    +
    + cap = cmd.resp[0];
    + DBG("Device Generic Caps (0-31) is: 0x%x.\n", cap);
    + host->uhs2_dev_prop.n_lanes = (cap >> UHS2_DEV_CONFIG_N_LANES_POS) &
    + UHS2_DEV_CONFIG_N_LANES_MASK;
    + host->uhs2_dev_prop.dadr_len = (cap >> UHS2_DEV_CONFIG_DADR_POS) &
    + UHS2_DEV_CONFIG_DADR_MASK;
    + host->uhs2_dev_prop.app_type = (cap >> UHS2_DEV_CONFIG_APP_POS) &
    + UHS2_DEV_CONFIG_APP_MASK;
    +
    + DBG("INQUIRY_CFG: read PHY Caps.\n");
    + arg = ((UHS2_DEV_CONFIG_PHY_CAPS & 0xFF) << 8) |
    + UHS2_NATIVE_CMD_READ |
    + UHS2_NATIVE_CMD_PLEN_8B |
    + (UHS2_DEV_CONFIG_PHY_CAPS >> 8);
    +
    + DBG("Begin INQUIRY_CFG, header=0x%x, arg=0x%x.\n",
    + header, arg);
    + uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, NULL, 0, NULL, 0);
    +
    + err = mmc_wait_for_cmd(host, &cmd, 0);
    + if (err) {
    + pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
    + mmc_hostname(host), __func__, err);
    + return -EIO;
    + }
    +
    + if (IS_ENABLED(CONFIG_MMC_DEBUG)) {
    + int i;
    +
    + pr_warn("%s: INQUIRY_CFG PHY response is: ",
    + mmc_hostname(host));
    + for (i = 0; i < 2; i++)
    + pr_warn("0x%x ", cmd.resp[i]);
    + pr_warn("\n");
    + }
    +
    + cap = cmd.resp[0];
    + DBG("Device PHY Caps (0-31) is: 0x%x.\n", cap);
    + host->uhs2_dev_prop.phy_minor_rev = cap &
    + UHS2_DEV_CONFIG_PHY_MINOR_MASK;
    + host->uhs2_dev_prop.phy_major_rev = (cap >>
    + UHS2_DEV_CONFIG_PHY_MAJOR_POS) &
    + UHS2_DEV_CONFIG_PHY_MAJOR_MASK;
    + host->uhs2_dev_prop.can_hibernate = (cap >>
    + UHS2_DEV_CONFIG_CAN_HIBER_POS) &
    + UHS2_DEV_CONFIG_CAN_HIBER_MASK;
    +
    + cap = cmd.resp[1];
    + DBG("Device PHY Caps (32-63) is: 0x%x.\n", cap);
    + host->uhs2_dev_prop.n_lss_sync = cap & UHS2_DEV_CONFIG_N_LSS_SYN_MASK;
    + host->uhs2_dev_prop.n_lss_dir = (cap >>
    + UHS2_DEV_CONFIG_N_LSS_DIR_POS) &
    + UHS2_DEV_CONFIG_N_LSS_DIR_MASK;
    + if (host->uhs2_dev_prop.n_lss_sync == 0)
    + host->uhs2_dev_prop.n_lss_sync = 16 << 2;
    + else
    + host->uhs2_dev_prop.n_lss_sync <<= 2;
    +
    + if (host->uhs2_dev_prop.n_lss_dir == 0)
    + host->uhs2_dev_prop.n_lss_dir = 16 << 3;
    + else
    + host->uhs2_dev_prop.n_lss_dir <<= 3;
    +
    + DBG("INQUIRY_CFG: read LINK-TRAN Caps.\n");
    + arg = ((UHS2_DEV_CONFIG_LINK_TRAN_CAPS & 0xFF) << 8) |
    + UHS2_NATIVE_CMD_READ |
    + UHS2_NATIVE_CMD_PLEN_8B |
    + (UHS2_DEV_CONFIG_LINK_TRAN_CAPS >> 8);
    +
    + DBG("Begin INQUIRY_CFG, header=0x%x, arg=0x%x.\n",
    + header, arg);
    + uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, NULL, 0, NULL, 0);
    +
    + err = mmc_wait_for_cmd(host, &cmd, 0);
    + if (err) {
    + pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
    + mmc_hostname(host), __func__, err);
    + return -EIO;
    + }
    +
    + if (IS_ENABLED(CONFIG_MMC_DEBUG)) {
    + int i;
    +
    + pr_warn("%s: INQUIRY_CFG Link-Tran response is: ",
    + mmc_hostname(host));
    + for (i = 0; i < 2; i++)
    + pr_warn("0x%x ", cmd.resp[i]);
    + pr_warn("\n");
    + }
    +
    + cap = cmd.resp[0];
    + DBG("Device LINK-TRAN Caps (0-31) is: 0x%x.\n", cap);
    + host->uhs2_dev_prop.link_minor_rev = cap &
    + UHS2_DEV_CONFIG_LT_MINOR_MASK;
    + host->uhs2_dev_prop.link_major_rev = (cap >>
    + UHS2_DEV_CONFIG_LT_MAJOR_POS) &
    + UHS2_DEV_CONFIG_LT_MAJOR_MASK;
    + host->uhs2_dev_prop.n_fcu = (cap >> UHS2_DEV_CONFIG_N_FCU_POS) &
    + UHS2_DEV_CONFIG_N_FCU_MASK;
    + host->uhs2_dev_prop.dev_type = (cap >> UHS2_DEV_CONFIG_DEV_TYPE_POS) &
    + UHS2_DEV_CONFIG_DEV_TYPE_MASK;
    + host->uhs2_dev_prop.maxblk_len = (cap >>
    + UHS2_DEV_CONFIG_MAX_BLK_LEN_POS) &
    + UHS2_DEV_CONFIG_MAX_BLK_LEN_MASK;
    +
    + cap = cmd.resp[1];
    + DBG("Device LINK-TRAN Caps (32-63) is: 0x%x.\n", cap);
    + host->uhs2_dev_prop.n_data_gap = cap & UHS2_DEV_CONFIG_N_DATA_GAP_MASK;
    + if (host->uhs2_dev_prop.n_fcu == 0)
    + host->uhs2_dev_prop.n_fcu = 256;
    +
    + return 0;
    +}
    +
    +/*
    + * Based on the card's and host's UHS-II capabilities, let's update the
    + * configuration of the card and the host. This may also include to move to a
    + * greater speed range/mode. Depending on the updated configuration, we may need
    + * to do a soft reset of the card via sending it a GO_DORMANT_STATE command.
    + *
    + * In the final step, let's check if the card signals "config completion", which
    + * indicates that the card has moved from config state into active state.
    + */
    +//static int sd_uhs2_config_write(struct mmc_host *host, struct mmc_card *card)
    +static int sd_uhs2_config_write(struct mmc_host *host)
    +{
    + struct mmc_command cmd = {0};
    + struct uhs2_command uhs2_cmd = {};
    + u16 header = 0, arg = 0;
    + u32 nTry;
    + u32 payload[2];
    + u8 nMinDataGap;
    + u8 plen;
    + int err;
    + u8 resp[5] = {0};
    + u8 resp_len = 5;
    + /*
    + * must long enough for RECV_SW_DIR == 2;
    + * need lss_dir at least 4 for GL9755 device
    + * max compitable gLssDir = 0
    + */
    + u32 gLssDir = 0;
    +
    + DBG("SET_COMMON_CFG: write Generic Settings.\n");
    + header = UHS2_NATIVE_PACKET |
    + UHS2_PACKET_TYPE_CCMD | host->uhs2_dev_prop.node_id;
    + arg = ((UHS2_DEV_CONFIG_GEN_SET & 0xFF) << 8) |
    + UHS2_NATIVE_CMD_WRITE |
    + UHS2_NATIVE_CMD_PLEN_8B |
    + (UHS2_DEV_CONFIG_GEN_SET >> 8);
    +
    + if (host->uhs2_dev_prop.n_lanes == UHS2_DEV_CONFIG_2L_HD_FD &&
    + host->uhs2_caps.n_lanes == UHS2_DEV_CONFIG_2L_HD_FD) {
    + /* Support HD */
    + DBG("Both Host and device support 2L-HD.\n");
    + host->flags |= MMC_UHS2_2L_HD;
    + host->uhs2_caps.n_lanes_set = UHS2_DEV_CONFIG_GEN_SET_2L_FD_HD;
    + host->uhs2_dev_prop.n_lanes_set =
    + UHS2_DEV_CONFIG_GEN_SET_2L_FD_HD;
    + nMinDataGap = 1;
    + } else {
    + /* Only support 2L-FD so far */
    + host->flags &= ~MMC_UHS2_2L_HD;
    + host->uhs2_caps.n_lanes_set = UHS2_DEV_CONFIG_GEN_SET_2L_FD_HD;
    + host->uhs2_dev_prop.n_lanes_set =
    + UHS2_DEV_CONFIG_GEN_SET_2L_FD_HD;
    + nMinDataGap = 3;
    + }
    +
    + plen = 2;
    + payload[0] = host->uhs2_dev_prop.n_lanes_set <<
    + UHS2_DEV_CONFIG_N_LANES_POS;
    + payload[1] = 0;
    + payload[0] = cpu_to_be32(payload[0]);
    + payload[1] = cpu_to_be32(payload[1]);
    +
    + DBG("Begin SET_COMMON_CFG, header=0x%x, arg=0x%x\n", header, arg);
    + DBG("UHS2 write Generic Settings %08x %08x\n",
    + payload[0], payload[1]);
    + DBG("flags=%08x dev_prop.n_lanes_set=%x host_caps.n_lanes_set=%x\n",
    + host->flags,
    + host->uhs2_dev_prop.n_lanes_set,
    + host->uhs2_caps.n_lanes_set);
    +
    + /*
    + * There is no payload because per spec, there should be
    + * no payload field for read CCMD.
    + * Plen is set in arg. Per spec, plen for read CCMD
    + * represents the len of read data which is assigned in payload
    + * of following RES (p136).
    + */
    + uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, plen, NULL, 0);
    +
    + err = mmc_wait_for_cmd(host, &cmd, 0);
    + if (err) {
    + pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
    + mmc_hostname(host), __func__, err);
    + return -EIO;
    + }
    +
    + DBG("SET_COMMON_CFG: PHY Settings.\n");
    + arg = ((UHS2_DEV_CONFIG_PHY_SET & 0xFF) << 8) |
    + UHS2_NATIVE_CMD_WRITE |
    + UHS2_NATIVE_CMD_PLEN_8B |
    + (UHS2_DEV_CONFIG_PHY_SET >> 8);
    +
    + for (nTry = 0; nTry < 2; nTry++) {
    + plen = 2;
    +
    + if (host->uhs2_caps.speed_range ==
    + UHS2_DEV_CONFIG_PHY_SET_SPEED_B) {
    + host->flags |= MMC_UHS2_SPEED_B;
    + host->uhs2_dev_prop.speed_range_set =
    + UHS2_DEV_CONFIG_PHY_SET_SPEED_B;
    + DBG("set dev_prop.speed_range_set to SPEED_B\n");
    + } else {
    + host->uhs2_dev_prop.speed_range_set =
    + UHS2_DEV_CONFIG_PHY_SET_SPEED_A;
    + host->flags &= ~MMC_UHS2_SPEED_B;
    + DBG("set dev_prop.speed_range_set to SPEED_A\n");
    + }
    +
    + payload[0] = host->uhs2_dev_prop.speed_range_set <<
    + UHS2_DEV_CONFIG_PHY_SET_SPEED_POS;
    +
    + host->uhs2_dev_prop.n_lss_sync_set =
    + (min(host->uhs2_dev_prop.n_lss_sync,
    + host->uhs2_caps.n_lss_sync) >> 2) &
    + UHS2_DEV_CONFIG_N_LSS_SYN_MASK;
    + host->uhs2_caps.n_lss_sync_set =
    + host->uhs2_dev_prop.n_lss_sync_set;
    +
    + if (nTry) {
    + host->uhs2_dev_prop.n_lss_dir_set =
    + (max(host->uhs2_dev_prop.n_lss_dir,
    + host->uhs2_caps.n_lss_dir) >> 3) &
    + UHS2_DEV_CONFIG_N_LSS_DIR_MASK;
    + host->uhs2_caps.n_lss_dir_set =
    + host->uhs2_dev_prop.n_lss_dir_set;
    + payload[1] = (host->uhs2_dev_prop.n_lss_dir_set <<
    + UHS2_DEV_CONFIG_N_LSS_DIR_POS) |
    + host->uhs2_dev_prop.n_lss_sync_set;
    + } else {
    + host->uhs2_caps.n_lss_dir_set =
    + (host->uhs2_dev_prop.n_lss_dir >> 3) &
    + UHS2_DEV_CONFIG_N_LSS_DIR_MASK;
    + host->uhs2_dev_prop.n_lss_dir_set =
    + ((host->uhs2_caps.n_lss_dir >> 3) + 1) &
    + UHS2_DEV_CONFIG_N_LSS_DIR_MASK;
    + }
    +
    + if (!gLssDir) {
    + host->uhs2_dev_prop.n_lss_dir_set = 0;
    + } else {
    + host->uhs2_dev_prop.n_lss_dir_set =
    + max((u8)gLssDir,
    + host->uhs2_dev_prop.n_lss_dir_set);
    + }
    +
    + payload[1] = (host->uhs2_dev_prop.n_lss_dir_set <<
    + UHS2_DEV_CONFIG_N_LSS_DIR_POS) |
    + host->uhs2_dev_prop.n_lss_sync_set;
    + payload[0] = cpu_to_be32(payload[0]);
    + payload[1] = cpu_to_be32(payload[1]);
    +
    + DBG("UHS2 SET PHY Settings %08x %08x\n",
    + payload[0], payload[1]);
    + DBG("host->flags=%08x dev_prop.speed_range_set=%x\n",
    + host->flags,
    + host->uhs2_dev_prop.speed_range_set);
    + DBG("dev_prop.n_lss_sync_set=%x host_caps.n_lss_sync_set=%x\n",
    + host->uhs2_dev_prop.n_lss_sync_set,
    + host->uhs2_caps.n_lss_sync_set);
    + DBG("dev_prop.n_lss_dir_set=%x host_caps.n_lss_dir_set=%x\n",
    + host->uhs2_dev_prop.n_lss_dir_set,
    + host->uhs2_caps.n_lss_dir_set);
    +
    + DBG("Begin SET_COMMON_CFG header=0x%x arg=0x%x\n",
    + header, arg);
    + DBG("\t\tpayload[0]=0x%x payload[1]=0x%x\n",
    + payload[0], payload[1]);
    +
    + resp_len = 4;
    + memset(resp, 0, sizeof(resp));
    +
    + uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg,
    + payload, plen, resp, resp_len);
    +
    + err = mmc_wait_for_cmd(host, &cmd, 0);
    + if (err) {
    + pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
    + mmc_hostname(host), __func__, err);
    + return -EIO;
    + }
    +
    + if (!(resp[2] & 0x80))
    + break;
    +
    + DBG("%s: %s: UHS2 SET PHY Settings fail, res= 0x%x!\n",
    + mmc_hostname(host), __func__, resp[2]);
    + }
    +
    + DBG("SET_COMMON_CFG: LINK-TRAN Settings.\n");
    + arg = ((UHS2_DEV_CONFIG_LINK_TRAN_SET & 0xFF) << 8) |
    + UHS2_NATIVE_CMD_WRITE |
    + UHS2_NATIVE_CMD_PLEN_8B |
    + (UHS2_DEV_CONFIG_LINK_TRAN_SET >> 8);
    +
    + plen = 2;
    +
    + if (host->uhs2_dev_prop.app_type == UHS2_DEV_CONFIG_APP_SD_MEM)
    + host->uhs2_dev_prop.maxblk_len_set =
    + UHS2_DEV_CONFIG_LT_SET_MAX_BLK_LEN;
    + else
    + host->uhs2_dev_prop.maxblk_len_set =
    + min(host->uhs2_dev_prop.maxblk_len,
    + host->uhs2_caps.maxblk_len);
    + host->uhs2_caps.maxblk_len_set = host->uhs2_dev_prop.maxblk_len_set;
    +
    + host->uhs2_dev_prop.n_fcu_set =
    + min(host->uhs2_dev_prop.n_fcu,
    + host->uhs2_caps.n_fcu);
    + host->uhs2_caps.n_fcu_set = host->uhs2_dev_prop.n_fcu_set;
    +
    + host->uhs2_dev_prop.n_data_gap_set =
    + max(nMinDataGap, host->uhs2_dev_prop.n_data_gap);
    +
    + host->uhs2_caps.n_data_gap_set = host->uhs2_dev_prop.n_data_gap_set;
    +
    + host->uhs2_caps.max_retry_set = 3;
    + host->uhs2_dev_prop.max_retry_set = host->uhs2_caps.max_retry_set;
    +
    + payload[0] = (host->uhs2_dev_prop.maxblk_len_set <<
    + UHS2_DEV_CONFIG_MAX_BLK_LEN_POS) |
    + (host->uhs2_dev_prop.max_retry_set <<
    + UHS2_DEV_CONFIG_LT_SET_MAX_RETRY_POS) |
    + (host->uhs2_dev_prop.n_fcu_set <<
    + UHS2_DEV_CONFIG_N_FCU_POS);
    + payload[1] = host->uhs2_dev_prop.n_data_gap_set;
    + payload[0] = cpu_to_be32(payload[0]);
    + payload[1] = cpu_to_be32(payload[1]);
    +
    + DBG("Begin SET_COMMON_CFG header=0x%x arg=0x%x\n", header, arg);
    + DBG("\t\tpayload[0]=0x%x payload[1]=0x%x\n", payload[0], payload[1]);
    +
    + uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, plen, NULL, 0);
    +
    + err = mmc_wait_for_cmd(host, &cmd, 0);
    + if (err) {
    + pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
    + mmc_hostname(host), __func__, err);
    + return -EIO;
    + }
    +
    + DBG("SET_COMMON_CFG: Set Config Completion.\n");
    + arg = ((UHS2_DEV_CONFIG_GEN_SET & 0xFF) << 8) |
    + UHS2_NATIVE_CMD_WRITE |
    + UHS2_NATIVE_CMD_PLEN_8B |
    + (UHS2_DEV_CONFIG_GEN_SET >> 8);
    +
    + plen = 2;
    + payload[0] = 0;
    + payload[1] = UHS2_DEV_CONFIG_GEN_SET_CFG_COMPLETE;
    + payload[0] = cpu_to_be32(payload[0]);
    + payload[1] = cpu_to_be32(payload[1]);
    +
    + DBG("Begin SET_COMMON_CFG, header=0x%x, arg=0x%x, payload[0] = 0x%x.\n",
    + header, arg, payload[0]);
    + resp_len = 5;
    + memset(resp, 0, sizeof(resp));
    + uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, plen,
    + resp, resp_len);
    +
    + err = mmc_wait_for_cmd(host, &cmd, 0);
    + if (err) {
    + pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
    + mmc_hostname(host), __func__, err);
    + return -EIO;
    + }
    +
    + /* Set host Config Setting registers */
    + if (!host->ops->uhs2_set_reg ||
    + host->ops->uhs2_set_reg(host, SET_CONFIG)) {
    + pr_err("%s: %s: UHS2 SET_CONFIG fail!\n",
    + mmc_hostname(host), __func__);
    + return -EIO;
    + }
    +
    + return 0;
    +}
    +
    +static int uhs2_go_dormant(struct mmc_host *host, bool hibernate)
    +{
    + struct mmc_command cmd = {0};
    + struct uhs2_command uhs2_cmd = {};
    + u16 header = 0, arg = 0;
    + u32 payload[1];
    + u8 plen = 1;
    + int err;
    +
    + /* Disable Normal INT */
    + if (!host->ops->uhs2_set_reg ||
    + host->ops->uhs2_set_reg(host, DISABLE_INT)) {
    + pr_err("%s: %s: UHS2 DISABLE_INT fail!\n",
    + mmc_hostname(host), __func__);
    + return -EIO;
    + }
    +
    + header = UHS2_NATIVE_PACKET | UHS2_PACKET_TYPE_CCMD |
    + host->uhs2_dev_prop.node_id;
    +
    + arg = ((UHS2_DEV_CMD_GO_DORMANT_STATE & 0xFF) << 8) |
    + UHS2_NATIVE_CMD_WRITE |
    + UHS2_NATIVE_CMD_PLEN_4B |
    + (UHS2_DEV_CMD_GO_DORMANT_STATE >> 8);
    +
    + if (hibernate)
    + payload[0] = UHS2_DEV_CMD_DORMANT_HIBER;
    +
    + DBG("Begin GO_DORMANT_STATE, header=0x%x, arg=0x%x, payload=0x%x.\n",
    + header, arg, payload[0]);
    + uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, plen, NULL, 0);
    +
    + err = mmc_wait_for_cmd(host, &cmd, 0);
    + if (err) {
    + pr_err("%s: %s: UHS2 CMD send fail, err= 0x%x!\n",
    + mmc_hostname(host), __func__, err);
    + return -EIO;
    + }
    +
    + /* Check Dormant State in Present */
    + if (!host->ops->uhs2_set_reg ||
    + host->ops->uhs2_set_reg(host, CHECK_DORMANT)) {
    + pr_err("%s: %s: UHS2 GO_DORMANT_STATE fail!\n",
    + mmc_hostname(host), __func__);
    + return -EIO;
    + }
    +
    + if (host->ops->uhs2_disable_clk)
    + host->ops->uhs2_disable_clk(host);
    +
    + return 0;
    +}
    +
    +static int uhs2_change_speed(struct mmc_host *host)
    +{
    + int err;
    +
    + /* Change Speed Range */
    + if (!host->ops->uhs2_set_reg ||
    + host->ops->uhs2_set_reg(host, SET_SPEED_B)) {
    + pr_err("%s: %s: UHS2 SET_SPEED fail!\n",
    + mmc_hostname(host), __func__);
    + return -EIO;
    + }
    +
    + err = uhs2_go_dormant(host, false);
    + if (err) {
    + pr_err("%s: %s: UHS2 GO_DORMANT_STATE fail, err= 0x%x!\n",
    + mmc_hostname(host), __func__, err);
    + return -EIO;
    + }
    +
    + /* restore sd clock */
    + mdelay(5);
    + if (host->ops->uhs2_enable_clk)
    + host->ops->uhs2_enable_clk(host);
    +
    + /* Enable Normal INT */
    + if (!host->ops->uhs2_set_reg ||
    + host->ops->uhs2_set_reg(host, ENABLE_INT)) {
    + pr_err("%s: %s: UHS2 ENABLE_INT fail!\n",
    + mmc_hostname(host), __func__);
    + return -EIO;
    + }
    +
    + if (!host->ops->uhs2_detect_init ||
    + host->ops->uhs2_detect_init(host)) {
    + pr_err("%s: %s: uhs2_detect_init() fail!\n",
    + mmc_hostname(host), __func__);
    + return -EIO;
    + }
    +
    + return 0;
    +}
    +
    +/*
    + * Initialize the UHS-II card through the SD-TRAN transport layer. This enables
    + * commands/requests to be backwards compatible through the legacy SD protocol.
    + * UHS-II cards has a specific power limit specified for VDD1/VDD2, that should
    + * be set through a legacy CMD6. Note that, the power limit that becomes set,
    + * survives a soft reset through the GO_DORMANT_STATE command.
    + */
    +static int sd_uhs2_legacy_init(struct mmc_host *host)
    +{
    + int err;
    + u32 ocr, rocr;
    +
    + WARN_ON(!host->claimed);
    +
    + // Jason test
    + mmc_go_idle(host);
    + mmc_delay(10);
    +
    + err = mmc_send_if_cond(host, host->ocr_avail);
    + if (err) {
    + pr_err("%s: %s: UHS2 CMD8 fail!\n", mmc_hostname(host), __func__);
    + //return err;
    + }
    +
    + err = mmc_send_app_op_cond(host, 0, &ocr);
    + if (err)
    + return err;
    +
    + if (host->ocr_avail_sd)
    + host->ocr_avail = host->ocr_avail_sd;
    +
    + /*
    + * Some SD cards claims an out of spec VDD voltage range. Let's treat
    + * these bits as being in-valid and especially also bit7.
    + */
    + ocr &= ~0x7FFF;
    +
    + rocr = mmc_select_voltage(host, ocr);
    +
    + /*
    + * Some cards have zero value of rocr in UHS-II mode. Assign host's ocr
    + * value to rocr.
    + */
    + if (!rocr)
    + rocr = host->ocr_avail;
    +
    + /*
    + * Can we support the voltage(s) of the card(s)?
    + */
    + if (!rocr) {
    + pr_err("%s: UHS2: there is no valid OCR.\n", mmc_hostname(host));
    + return -EINVAL;
    + }
    +
    + /*
    + * Detect and init the card.
    + */
    + err = mmc_sd_init_card(host, rocr, NULL);
    + if (err)
    + return err;
    +
    + return 0;
    +}
    +
    +/*
    + * Run the phy initialization sequence, which mainly relies on the UHS-II host
    + * to check that we reach the expected electrical state, between the host and
    + * the card.
    + */
    +static int sd_uhs2_phy_init(struct mmc_host *host)
    +{
    + if (!host->ops->uhs2_detect_init ||
    + host->ops->uhs2_detect_init(host)) {
    + pr_err("%s: fail to detect UHS2!\n", mmc_hostname(host));
    + return UHS2_PHY_INIT_ERR;
    + }
    + return 0;
    +}
    +
    +static void sd_uhs2_remove(struct mmc_host *host)
    +{
    + mmc_remove_card(host->card);
    + host->card = NULL;
    +}
    +
    +static int sd_uhs2_alive(struct mmc_host *host)
    +{
    + return mmc_send_status(host->card, NULL);
    +}
    +
    +static void sd_uhs2_detect(struct mmc_host *host)
    +{
    + int err;
    +
    + mmc_get_card(host->card, NULL);
    + err = _mmc_detect_card_removed(host);
    + mmc_put_card(host->card, NULL);
    +
    + if (err) {
    + sd_uhs2_remove(host);
    +
    + mmc_claim_host(host);
    + mmc_detach_bus(host);
    + mmc_power_off(host);
    + mmc_release_host(host);
    + }
    +}
    +
    +static int sd_uhs2_suspend(struct mmc_host *host)
    +{
    + return 0;
    +}
    +
    +static int sd_uhs2_resume(struct mmc_host *host)
    +{
    + return 0;
    +}
    +
    +static int sd_uhs2_runtime_suspend(struct mmc_host *host)
    +{
    + return 0;
    +}
    +
    +static int sd_uhs2_runtime_resume(struct mmc_host *host)
    +{
    + return 0;
    +}
    +
    +static int sd_uhs2_shutdown(struct mmc_host *host)
    +{
    + return 0;
    +}
    +
    +
    +/**
    + * sd_uhs2_hw_reset - invoke SW reset
    + * @host: MMC host
    + *
    + * Invoke SW reset, depending on a bit in @mask and wait for completion.
    + */
    +static int sd_uhs2_hw_reset(struct mmc_host *host)
    +{
    + int err = 0;
    +
    + if (!host->ops->uhs2_set_reg ||
    + host->ops->uhs2_set_reg(host, UHS2_SW_RESET)) {
    + pr_err("%s: %s: UHS2_SW_RESET fail!\n",
    + mmc_hostname(host), __func__);
    + return -EIO;
    + }
    +
    + return err;
    +}
    +
    +static int sd_uhs2_attach(struct mmc_host *host)
    +{
    + int err;
    +
    + err = sd_uhs2_phy_init(host);
    + if (err)
    + return err;
    +
    + err = sd_uhs2_init_card(host);
    + if (err)
    + return err;
    +
    + mmc_release_host(host);
    + err = mmc_add_card(host->card);
    + if (err) {
    + mmc_remove_card(host->card);
    + host->card = NULL;
    + mmc_detach_bus(host);
    + mmc_claim_host(host);
    + return err;;
    + }
    +
    + mmc_claim_host(host);
    +
    + /* TODO: Is this the right place? */
    + if (host->ops->uhs2_post_attach_sd)
    + host->ops->uhs2_post_attach_sd(host);
    +
    + return 0;
    +}
    +
    +/**
    + * uhs2_prepare_sd_cmd - prepare for SD command packet
    + * @host: MMC host
    + * @mrq: MMC request
    + *
    + * Initialize and fill in a header and a payload of SD command packet.
    + * The caller should allocate uhs2_command in host->cmd->uhs2_cmd in
    + * advance.
    + *
    + * Return: 0 on success, non-zero error on failure
    + */
    +int uhs2_prepare_sd_cmd(struct mmc_host *host, struct mmc_request *mrq)
    +{
    + struct mmc_command *cmd;
    + struct uhs2_command *uhs2_cmd;
    + u16 header = 0, arg = 0;
    + u32 *payload;
    + u8 plen = 0;
    +
    + cmd = mrq->cmd;
    + header = host->uhs2_dev_prop.node_id;
    + if ((cmd->flags & MMC_CMD_MASK) == MMC_CMD_ADTC)
    + header |= UHS2_PACKET_TYPE_DCMD;
    + else
    + header |= UHS2_PACKET_TYPE_CCMD;
    +
    + arg = cmd->opcode << UHS2_SD_CMD_INDEX_POS;
    + if (host->flags & MMC_UHS2_APP_CMD) {
    + arg |= UHS2_SD_CMD_APP;
    + host->flags &= ~MMC_UHS2_APP_CMD;
    + }
    +
    + uhs2_cmd = cmd->uhs2_cmd;
    + payload = uhs2_cmd->payload;
    + plen = 2; /* at the maximum */
    +
    + if ((cmd->flags & MMC_CMD_MASK) == MMC_CMD_ADTC &&
    + !cmd->uhs2_tmode0_flag) {
    + if (host->flags & MMC_UHS2_2L_HD)
    + arg |= UHS2_DCMD_2L_HD_MODE;
    +
    + arg |= UHS2_DCMD_LM_TLEN_EXIST;
    +
    + if (cmd->data->blocks == 1 &&
    + cmd->data->blksz != 512 &&
    + cmd->opcode != MMC_READ_SINGLE_BLOCK &&
    + cmd->opcode != MMC_WRITE_BLOCK) {
    + arg |= UHS2_DCMD_TLUM_BYTE_MODE;
    + payload[1] = uhs2_dcmd_convert_msb(cmd->data->blksz);
    + } else {
    + payload[1] = uhs2_dcmd_convert_msb(cmd->data->blocks);
    + }
    +
    + if (cmd->opcode == SD_IO_RW_EXTENDED) {
    + arg &= ~(UHS2_DCMD_LM_TLEN_EXIST |
    + UHS2_DCMD_TLUM_BYTE_MODE |
    + UHS2_NATIVE_DCMD_DAM_IO);
    + payload[1] = 0;
    + plen = 1;
    + }
    + } else {
    + plen = 1;
    + }
    +
    + payload[0] = uhs2_dcmd_convert_msb(cmd->arg);
    + pr_debug("%s: %s: sd_cmd->arg = 0x%x, payload[0]= 0x%x.\n",
    + mmc_hostname(host), __func__, cmd->arg, payload[0]);
    +
    + uhs2_cmd_assemble(cmd, uhs2_cmd, header, arg, payload, plen, NULL, 0);
    +
    + return 0;
    +}
    +EXPORT_SYMBOL_GPL(uhs2_prepare_sd_cmd);
    +
    +static const struct mmc_bus_ops sd_uhs2_ops = {
    + .remove = sd_uhs2_remove,
    + .alive = sd_uhs2_alive,
    + .detect = sd_uhs2_detect,
    + .suspend = sd_uhs2_suspend,
    + .resume = sd_uhs2_resume,
    + .runtime_suspend = sd_uhs2_runtime_suspend,
    + .runtime_resume = sd_uhs2_runtime_resume,
    + .shutdown = sd_uhs2_shutdown,
    + .hw_reset = sd_uhs2_hw_reset,
    +};
    +
    +/*
    + * Allocate the data structure for the mmc_card and run the UHS-II specific
    + * initialization sequence.
    + */
    +int sd_uhs2_init_card(struct mmc_host *host)
    +{
    +// struct mmc_card *card;
    +// u32 node_id;
    + int err = -EIO;
    +
    + if (sd_uhs2_dev_init(host)) {
    + pr_err("%s: UHS2 DEVICE_INIT fail!\n", mmc_hostname(host));
    + return err;
    + }
    +
    + if (sd_uhs2_enum(host))
    + {
    + pr_err("%s: UHS2 ENUMERATE fail!\n", mmc_hostname(host));
    + return err;
    + }
    +
    + if (sd_uhs2_config_read(host)) {
    + pr_err("%s: UHS2 INQUIRY_CONFIG fail!\n", mmc_hostname(host));
    + return err;
    + }
    +
    + if (sd_uhs2_config_write(host)) {
    + pr_err("%s: UHS2 SET_COMMON_CONFIG fail!\n", mmc_hostname(host));
    + return err;
    + }
    +
    + mmc_delay(10);
    +
    + /* Change to Speed Range B if it is supported */
    + if (host->flags & MMC_UHS2_SPEED_B) {
    + if (uhs2_change_speed(host)) {
    + pr_err("%s: UHS2 uhs2_change_speed() fail!\n",
    + mmc_hostname(host));
    + return err;
    + }
    + }
    +
    + host->flags |= MMC_UHS2_INITIALIZED;
    +
    + mmc_attach_bus(host, &sd_uhs2_ops);
    +
    + if (sd_uhs2_legacy_init(host)) {
    + pr_err("%s: sd_uhs2_legacy_init: error %d.\n", mmc_hostname(host), err);
    + mmc_detach_bus(host);
    + return err;
    + }
    +
    + return 0;
    +}
    +
    +/**
    + * mmc_uhs2_rescan_try_freq - select UHS2 interface
    + * @host: MMC host
    + * @freq: Bus speed
    + *
    + * Try to select UHS2 interface and initialize the bus for a given
    + * frequency, @freq.
    + *
    + * Return: 0 on success, non-zero error on failure
    + */
    +int mmc_uhs2_rescan_try_freq(struct mmc_host *host, unsigned int freq)
    +{
    + int err = -EIO;
    +
    + host->flags |= MMC_UHS2_SUPPORT;
    + host->f_init = freq;
    +
    + pr_debug("%s: %s: trying to init card at %u Hz\n",
    + mmc_hostname(host), __func__, host->f_init);
    +
    + if (!(host->caps2 & MMC_CAP2_NO_SDIO))
    + pr_info("mmc_attach_sdio\n");
    + if (!(host->caps2 & MMC_CAP2_NO_SD))
    + pr_info("mmc_attach_sd\n");
    +
    + mmc_power_up(host, 0);
    +
    + err = sd_uhs2_attach(host);
    + if (err) {
    + pr_err("%s: sd_uhs2_attach fail!\n", mmc_hostname(host));
    + goto init_fail;
    + }
    + else
    + return 0;
    +
    +//--------------------------------------------------------------------------------------
    +
    +init_fail:
    + mmc_power_off(host);
    + if (host->flags & MMC_UHS2_INITIALIZED)
    + host->flags &= ~MMC_UHS2_INITIALIZED;
    + host->flags &= ~MMC_UHS2_SUPPORT;
    +
    + return err;
    +}
    +EXPORT_SYMBOL_GPL(mmc_uhs2_rescan_try_freq);
    diff --git a/drivers/mmc/core/uhs2.h b/drivers/mmc/core/uhs2.h
    index 48486ba21062..d05a4c28df3e 100644
    --- a/drivers/mmc/core/uhs2.h
    +++ b/drivers/mmc/core/uhs2.h
    @@ -16,6 +16,7 @@
    #define UHS2_PHY_INIT_ERR 1

    int mmc_uhs2_rescan_try_freq(struct mmc_host *host, unsigned int freq);
    +int sd_uhs2_init_card(struct mmc_host *host);
    int uhs2_prepare_sd_cmd(struct mmc_host *host, struct mmc_request *mrq);

    #endif /* MMC_UHS2_H */
    diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
    index 3dd81c89d8f1..a5af2bd950f8 100644--
    --- a/drivers/mmc/host/sdhci-uhs2.c2.32.0
    +++ b/drivers/mmc/host/sdhci-uhs2.c
    @@ -545,6 +545,10 @@ static int sdhci_uhs2_set_reg(struct mmc_host *mmc, enum uhs2_act act)
    case CHECK_DORMANT:
    err = sdhci_uhs2_check_dormant(host);
    break;
    + case UHS2_SW_RESET:
    + sdhci_uhs2_reset(host, SDHCI_UHS2_SW_RESET_FULL);
    + /* FIXED IT : Modify return type of sdhci_uhs2_reset()? */
    + err = 0;
    + break;
    default:
    pr_err("%s: input action %d is wrong!\n",
    mmc_hostname(host->mmc), act);
    diff --git a/include/linux/mmc/uhs2.h b/include/linux/mmc/uhs2.h
    index 298ac7cd8904..ef249098b46f 100644
    --- a/include/linux/mmc/uhs2.h
    +++ b/include/linux/mmc/uhs2.h
    @@ -189,6 +189,7 @@ enum uhs2_act {
    DISABLE_INT,
    SET_SPEED_B,
    CHECK_DORMANT,
    + UHS2_SW_RESET,
    };

    /* UHS-II Device Registers */
    \
     
     \ /
      Last update: 2021-07-22 06:10    [W:4.493 / U:0.168 seconds]
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