On Mon, Jul 31, 2023 at 11:29 PM Adrian Hunter <adrian.hunter@xxxxxxxxx> wrote:
>
> On 21/07/23 13:13, Victor Shih wrote:
> > From: Victor Shih <victor.shih@xxxxxxxxxxxxxxxxxxx>
> >
> > Embed UHS-II access/control functionality into the MMC request
> > processing flow.
> >
> > Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
> > Signed-off-by: Jason Lai <jason.lai@xxxxxxxxxxxxxxxxxxx>
> > Signed-off-by: Victor Shih <victor.shih@xxxxxxxxxxxxxxxxxxx>
> > ---
> >
> > Updates in V8:
> > - Add MMC_UHS2_SUPPORT to be cleared in sd_uhs2_detect().
> > - Modify return value in sd_uhs2_attach().
> >
> > Updates in V7:
> > - Add mmc_uhs2_card_prepare_cmd helper function in sd_ops.h.
> > - Drop uhs2_state in favor of ios->timing.
> > - Remove unnecessary functions.
> >
> > ---
> >
> > drivers/mmc/core/block.c | 18 +-
> > drivers/mmc/core/core.c | 8 +
> > drivers/mmc/core/mmc_ops.c | 25 +-
> > drivers/mmc/core/mmc_ops.h | 1 +
> > drivers/mmc/core/sd.c | 13 +-
> > drivers/mmc/core/sd.h | 4 +
> > drivers/mmc/core/sd_ops.c | 11 +
> > drivers/mmc/core/sd_ops.h | 18 +
> > drivers/mmc/core/sd_uhs2.c | 1137 +++++++++++++++++++++++++++++++++++-
> > 9 files changed, 1176 insertions(+), 59 deletions(-)
> >
> > diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
> > index f701efb1fa78..6617ae9fc840 100644
> > --- a/drivers/mmc/core/block.c
> > +++ b/drivers/mmc/core/block.c
> > @@ -918,15 +918,9 @@ static int mmc_sd_num_wr_blocks(struct mmc_card *card, u32 *written_blocks)
> >
> > struct scatterlist sg;
> >
> > - cmd.opcode = MMC_APP_CMD;
> > - cmd.arg = card->rca << 16;
> > - cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
> > -
> > - err = mmc_wait_for_cmd(card->host, &cmd, 0);
> > - if (err)
> > - return err;
> > - if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
> > - return -EIO;
> > + err = mmc_app_cmd(card->host, card);
> > + if (err)
> > + return err;
> >
> > memset(&cmd, 0, sizeof(struct mmc_command));
> >
> > @@ -1612,6 +1606,9 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
> > struct request *req = mmc_queue_req_to_req(mqrq);
> > struct mmc_blk_data *md = mq->blkdata;
> > bool do_rel_wr, do_data_tag;
> > + bool do_multi;
> > +
> > + do_multi = (card->host->flags & MMC_UHS2_SD_TRAN) ? true : false;
> >
> > mmc_blk_data_prep(mq, mqrq, recovery_mode, &do_rel_wr, &do_data_tag);
> >
> > @@ -1622,7 +1619,7 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
> > brq->cmd.arg <<= 9;
> > brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
> >
> > - if (brq->data.blocks > 1 || do_rel_wr) {
> > + if (brq->data.blocks > 1 || do_rel_wr || do_multi) {
> > /* SPI multiblock writes terminate using a special
> > * token, not a STOP_TRANSMISSION request.
> > */
> > @@ -1635,6 +1632,7 @@ static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
> > brq->mrq.stop = NULL;
> > readcmd = MMC_READ_SINGLE_BLOCK;
> > writecmd = MMC_WRITE_BLOCK;
> > + brq->cmd.uhs2_tmode0_flag = 1;
> > }
> > brq->cmd.opcode = rq_data_dir(req) == READ ? readcmd : writecmd;
> >
> > diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> > index ba8808cd9318..f5dc653eafb0 100644
> > --- a/drivers/mmc/core/core.c
> > +++ b/drivers/mmc/core/core.c
> > @@ -334,6 +334,8 @@ static int mmc_mrq_prep(struct mmc_host *host, struct mmc_request *mrq)
> >
> > int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
> > {
> > + struct uhs2_command uhs2_cmd;
> > + __be32 payload[4]; /* for maximum size */
> > int err;
> >
> > init_completion(&mrq->cmd_completion);
> > @@ -351,6 +353,8 @@ int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
> > if (err)
> > return err;
> >
> > + mmc_uhs2_card_prepare_cmd(host, mrq, uhs2_cmd, payload);
> > +
> > led_trigger_event(host->led, LED_FULL);
> > __mmc_start_request(host, mrq);
>
> Same comment as for V8:
>
> Refer:
> https://lore.kernel.org/linux-mmc/047c746f-0787-37ec-7989-cd932f288564@xxxxxxxxx/
>
>
> __mmc_start_request() is also called by mmc_wait_for_req_done()
> but uhs2_cmd is local to mmc_start_request(), so if mmc_wait_for_req_done()
> is ever called in UHS2 case with cmd->retries, it looks like
> host controller might try to access uhs2_cmd which is no
> longer valid?
>
> There is perhaps mmc_send_status() used in block.c ?
>
> Need to get Ulf's view, but putting "struct uhs2_command uhs2_cmd"
> and "__be32 payload[4]" in struct mmc_command or struct mmc_request
> would seem to be options. If size is a concern, some optimization
> to reduce the size of struct uhs2_command looks possible, and is
> max payload len actually only 2 at the moment.
>
Hi, Ulf
Could I get your opinion on this matter?
Or maybe we could try the Adrian’s opinion first?
Thanks, Victor Shih
> >
> > @@ -430,6 +434,8 @@ EXPORT_SYMBOL(mmc_wait_for_req_done);
> > */
> > int mmc_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq)
> > {
> > + struct uhs2_command uhs2_cmd;
> > + __be32 payload[4]; /* for maximum size */
> > int err;
> >
> > /*
> > @@ -450,6 +456,8 @@ int mmc_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq)
> > if (err)
> > goto out_err;
> >
> > + mmc_uhs2_card_prepare_cmd(host, mrq, uhs2_cmd, payload);
> > +
> > err = host->cqe_ops->cqe_request(host, mrq);
> > if (err)
> > goto out_err;
> > diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
> > index 3b3adbddf664..8ae205a07f9b 100644
> > --- a/drivers/mmc/core/mmc_ops.c
> > +++ b/drivers/mmc/core/mmc_ops.c
> > @@ -144,10 +144,24 @@ int mmc_set_dsr(struct mmc_host *host)
> > return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
> > }
> >
> > +int __mmc_go_idle(struct mmc_host *host)
> > +{
> > + struct mmc_command cmd = {};
> > + int err;
> > +
> > + cmd.opcode = MMC_GO_IDLE_STATE;
> > + cmd.arg = 0;
> > + cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC;
> > +
> > + err = mmc_wait_for_cmd(host, &cmd, 0);
> > + mmc_delay(1);
> > +
> > + return err;
> > +}
> > +
> > int mmc_go_idle(struct mmc_host *host)
> > {
> > int err;
> > - struct mmc_command cmd = {};
> >
> > /*
> > * Non-SPI hosts need to prevent chipselect going active during
> > @@ -163,13 +177,7 @@ int mmc_go_idle(struct mmc_host *host)
> > mmc_delay(1);
> > }
> >
> > - cmd.opcode = MMC_GO_IDLE_STATE;
> > - cmd.arg = 0;
> > - cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC;
> > -
> > - err = mmc_wait_for_cmd(host, &cmd, 0);
> > -
> > - mmc_delay(1);
> > + err = __mmc_go_idle(host);
> >
> > if (!mmc_host_is_spi(host)) {
> > mmc_set_chip_select(host, MMC_CS_DONTCARE);
> > @@ -300,6 +308,7 @@ int mmc_send_adtc_data(struct mmc_card *card, struct mmc_host *host, u32 opcode,
> > * not R1 plus a data block.
> > */
> > cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
> > + cmd.uhs2_tmode0_flag = 1;
> >
> > data.blksz = len;
> > data.blocks = 1;
> > diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h
> > index 09ffbc00908b..abda7492d578 100644
> > --- a/drivers/mmc/core/mmc_ops.h
> > +++ b/drivers/mmc/core/mmc_ops.h
> > @@ -25,6 +25,7 @@ struct mmc_command;
> > int mmc_select_card(struct mmc_card *card);
> > int mmc_deselect_cards(struct mmc_host *host);
> > int mmc_set_dsr(struct mmc_host *host);
> > +int __mmc_go_idle(struct mmc_host *host);
> > int mmc_go_idle(struct mmc_host *host);
> > int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr);
> > int mmc_set_relative_addr(struct mmc_card *card);
> > diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
> > index 246ce027ae0a..15e465f0cc3f 100644
> > --- a/drivers/mmc/core/sd.c
> > +++ b/drivers/mmc/core/sd.c
> > @@ -207,7 +207,7 @@ static int mmc_decode_csd(struct mmc_card *card)
> > /*
> > * Given a 64-bit response, decode to our card SCR structure.
> > */
> > -static int mmc_decode_scr(struct mmc_card *card)
> > +int mmc_decode_scr(struct mmc_card *card)
> > {
> > struct sd_scr *scr = &card->scr;
> > unsigned int scr_struct;
> > @@ -904,7 +904,7 @@ int mmc_sd_get_csd(struct mmc_card *card)
> > return 0;
> > }
> >
> > -static int mmc_sd_get_ro(struct mmc_host *host)
> > +int mmc_sd_get_ro(struct mmc_host *host)
> > {
> > int ro;
> >
> > @@ -1616,11 +1616,6 @@ static void mmc_sd_detect(struct mmc_host *host)
> > }
> > }
> >
> > -static int sd_can_poweroff_notify(struct mmc_card *card)
> > -{
> > - return card->ext_power.feature_support & SD_EXT_POWER_OFF_NOTIFY;
> > -}
> > -
> > static int sd_busy_poweroff_notify_cb(void *cb_data, bool *busy)
> > {
> > struct sd_busy_data *data = cb_data;
> > @@ -1644,7 +1639,7 @@ static int sd_busy_poweroff_notify_cb(void *cb_data, bool *busy)
> > return 0;
> > }
> >
> > -static int sd_poweroff_notify(struct mmc_card *card)
> > +int sd_poweroff_notify(struct mmc_card *card)
> > {
> > struct sd_busy_data cb_data;
> > u8 *reg_buf;
> > @@ -1692,7 +1687,7 @@ static int _mmc_sd_suspend(struct mmc_host *host)
> > if (mmc_card_suspended(card))
> > goto out;
> >
> > - if (sd_can_poweroff_notify(card))
> > + if (mmc_sd_can_poweroff_notify(card))
> > err = sd_poweroff_notify(card);
> > else if (!mmc_host_is_spi(host))
> > err = mmc_deselect_cards(host);
> > diff --git a/drivers/mmc/core/sd.h b/drivers/mmc/core/sd.h
> > index 1af5a038bae9..d31259919ee5 100644
> > --- a/drivers/mmc/core/sd.h
> > +++ b/drivers/mmc/core/sd.h
> > @@ -11,10 +11,14 @@ struct mmc_card;
> >
> > int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr);
> > int mmc_sd_get_csd(struct mmc_card *card);
> > +int mmc_sd_get_ro(struct mmc_host *host);
> > void mmc_decode_cid(struct mmc_card *card);
> > int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
> > bool reinit);
> > unsigned mmc_sd_get_max_clock(struct mmc_card *card);
> > int mmc_sd_switch_hs(struct mmc_card *card);
> >
> > +/* These call back functions were also used by UHS2 sd card */
> > +int sd_poweroff_notify(struct mmc_card *card);
> > +
> > #endif
> > diff --git a/drivers/mmc/core/sd_ops.c b/drivers/mmc/core/sd_ops.c
> > index ef8d1dce5af1..1f9580491ad0 100644
> > --- a/drivers/mmc/core/sd_ops.c
> > +++ b/drivers/mmc/core/sd_ops.c
> > @@ -27,6 +27,15 @@ int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
> > if (WARN_ON(card && card->host != host))
> > return -EINVAL;
> >
> > + /*
> > + * UHS2 packet has APP bit so only set APP_CMD flag here.
> > + * Will set the APP bit when assembling UHS2 packet.
> > + */
> > + if (host->flags & MMC_UHS2_SD_TRAN) {
> > + host->uhs2_app_cmd = true;
> > + return 0;
> > + }
> > +
> > cmd.opcode = MMC_APP_CMD;
> >
> > if (card) {
> > @@ -281,6 +290,7 @@ int mmc_app_send_scr(struct mmc_card *card)
> > cmd.opcode = SD_APP_SEND_SCR;
> > cmd.arg = 0;
> > cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
> > + cmd.uhs2_tmode0_flag = 1;
> >
> > data.blksz = 8;
> > data.blocks = 1;
> > @@ -344,6 +354,7 @@ int mmc_app_sd_status(struct mmc_card *card, void *ssr)
> > cmd.opcode = SD_APP_SD_STATUS;
> > cmd.arg = 0;
> > cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_ADTC;
> > + cmd.uhs2_tmode0_flag = 1;
> >
> > data.blksz = 64;
> > data.blocks = 1;
> > diff --git a/drivers/mmc/core/sd_ops.h b/drivers/mmc/core/sd_ops.h
> > index 3ba7b3cf4652..8c2da57ca2c2 100644
> > --- a/drivers/mmc/core/sd_ops.h
> > +++ b/drivers/mmc/core/sd_ops.h
> > @@ -11,6 +11,7 @@
> > #include <linux/types.h>
> >
> > struct mmc_card;
> > +struct mmc_command;
> > struct mmc_host;
> >
> > int mmc_app_set_bus_width(struct mmc_card *card, int width);
> > @@ -19,10 +20,27 @@ int mmc_send_if_cond(struct mmc_host *host, u32 ocr);
> > int mmc_send_if_cond_pcie(struct mmc_host *host, u32 ocr);
> > int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca);
> > int mmc_app_send_scr(struct mmc_card *card);
> > +int mmc_decode_scr(struct mmc_card *card);
> > int mmc_sd_switch(struct mmc_card *card, int mode, int group,
> > u8 value, u8 *resp);
> > int mmc_app_sd_status(struct mmc_card *card, void *ssr);
> > int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card);
> > +void mmc_uhs2_prepare_cmd(struct mmc_host *host, struct mmc_request *mrq);
> > +
> > +static inline void mmc_uhs2_card_prepare_cmd(struct mmc_host *host, struct mmc_request *mrq,
> > + struct uhs2_command uhs2_cmd, __be32 payload[4])
> > +{
> > + if (host->flags & MMC_UHS2_SD_TRAN) {
> > + uhs2_cmd.payload = payload;
> > + mrq->cmd->uhs2_cmd = &uhs2_cmd;
> > + mmc_uhs2_prepare_cmd(host, mrq);
> > + }
> > +}
> > +
> > +static inline int mmc_sd_can_poweroff_notify(struct mmc_card *card)
> > +{
> > + return card->ext_power.feature_support & SD_EXT_POWER_OFF_NOTIFY;
> > +}
> >
> > #endif
> >
> > diff --git a/drivers/mmc/core/sd_uhs2.c b/drivers/mmc/core/sd_uhs2.c
> > index 06b2aab52b93..0a1b00b59499 100644
> > --- a/drivers/mmc/core/sd_uhs2.c
> > +++ b/drivers/mmc/core/sd_uhs2.c
> > @@ -1,23 +1,51 @@
> > // SPDX-License-Identifier: GPL-2.0-only
> > /*
> > * Copyright (C) 2021 Linaro Ltd
> > - *
> > * Author: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
> > *
> > + * Copyright (C) 2014 Intel Corp, All Rights Reserved.
> > + * Author: Yi Sun <yi.y.sun@xxxxxxxxx>
> > + *
> > + * Copyright (C) 2020 Genesys Logic, Inc.
> > + * Authors: Ben Chuang <ben.chuang@xxxxxxxxxxxxxxxxxxx>
> > + *
> > + * Copyright (C) 2020 Linaro Limited
> > + * Author: AKASHI Takahiro <takahiro.akashi@xxxxxxxxxx>
> > + *
> > + * Copyright (C) 2022 Genesys Logic, Inc.
> > + * Authors: Jason Lai <jason.lai@xxxxxxxxxxxxxxxxxxx>
> > + *
> > + * Copyright (C) 2023 Genesys Logic, Inc.
> > + * Authors: Victor Shih <victor.shih@xxxxxxxxxxxxxxxxxxx>
> > + *
> > * Support for SD UHS-II cards
> > */
> > #include <linux/err.h>
> > +#include <linux/pm_runtime.h>
> >
> > #include <linux/mmc/host.h>
> > #include <linux/mmc/card.h>
> > +#include <linux/mmc/mmc.h>
> > +#include <linux/mmc/sd.h>
> > +#include <linux/mmc/sd_uhs2.h>
> >
> > +#include "card.h"
> > #include "core.h"
> > #include "bus.h"
> > #include "sd.h"
> > +#include "sd_ops.h"
> > #include "mmc_ops.h"
> >
> > +#define UHS2_WAIT_CFG_COMPLETE_PERIOD_US (1 * 1000) /* 1ms */
> > +#define UHS2_WAIT_CFG_COMPLETE_TIMEOUT_MS 100 /* 100ms */
> > +
> > static const unsigned int sd_uhs2_freqs[] = { 52000000, 26000000 };
> >
> > +struct sd_uhs2_wait_active_state_data {
> > + struct mmc_host *host;
> > + struct mmc_command *cmd;
> > +};
> > +
> > static int sd_uhs2_power_up(struct mmc_host *host)
> > {
> > int err;
> > @@ -50,6 +78,43 @@ static int sd_uhs2_power_off(struct mmc_host *host)
> > return host->ops->uhs2_control(host, UHS2_SET_IOS);
> > }
> >
> > +/*
> > + * sd_uhs2_cmd_assemble() - build up UHS-II command packet which is embedded in
> > + * mmc_command structure
> > + * @cmd: MMC command to executed
> > + * @uhs2_cmd: UHS2 command corresponded to MMC command
> > + * @header: Header field of UHS-II command cxpacket
> > + * @arg: Argument field of UHS-II command packet
> > + * @payload: Payload field of UHS-II command packet
> > + * @plen: Payload length
> > + * @resp: Response buffer is allocated by caller and it is used to keep
> > + * the response of CM-TRAN command. For SD-TRAN command, uhs2_resp
> > + * should be null and SD-TRAN command response should be stored in
> > + * resp of mmc_command.
> > + * @resp_len: Response buffer length
> > + *
> > + * The uhs2_command structure contains message packets which are transmited/
> > + * received on UHS-II bus. This function fills in the contents of uhs2_command
> > + * structure and embededs UHS2 command into mmc_command structure, which is used
> > + * in legacy SD operation functions.
> > + *
> > + */
> > +static void sd_uhs2_cmd_assemble(struct mmc_command *cmd,
> > + struct uhs2_command *uhs2_cmd,
> > + u16 header, u16 arg, __be32 *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;
> > +}
> > +
> > /*
> > * 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
> > @@ -57,7 +122,15 @@ static int sd_uhs2_power_off(struct mmc_host *host)
> > */
> > static int sd_uhs2_phy_init(struct mmc_host *host)
> > {
> > - return 0;
> > + int err = 0;
> > +
> > + err = host->ops->uhs2_control(host, UHS2_PHY_INIT);
> > + if (err) {
> > + pr_err("%s: failed to initial phy for UHS-II!\n",
> > + mmc_hostname(host));
> > + }
> > +
> > + return err;
> > }
> >
> > /*
> > @@ -66,6 +139,82 @@ static int sd_uhs2_phy_init(struct mmc_host *host)
> > */
> > 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, resp_gap;
> > + u16 header, arg;
> > + __be32 payload[UHS2_DEV_INIT_PAYLOAD_LEN];
> > + u8 gd = 0;
> > + u8 resp[UHS2_DEV_ENUM_RESP_LEN] = {0};
> > + int err;
> > +
> > + dap = host->uhs2_caps.dap;
> > + gap = host->uhs2_caps.gap;
> > +
> > + /*
> > + * Refer to UHS-II Addendum Version 1.02 Figure 6-21 to see DEVICE_INIT CCMD format.
> > + * Head:
> > + * - Control Write(R/W=1) with 4-Byte payload(PLEN=01b).
> > + * - IOADR = CMD_BASE + 002h
> > + * Payload:
> > + * - bit [3:0] : GAP(Group Allocated Power)
> > + * - bit [7:4] : GD(Group Descriptor)
> > + * - bit [11] : Complete Flag
> > + * - bit [15:12]: DAP(Device Allocated Power)
> > + */
> > + 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);
> > +
> > + /*
> > + * Refer to UHS-II Addendum Version 1.02 section 6.3.1.
> > + * Max. time from DEVICE_INIT CCMD EOP reception on Device
> > + * Rx to its SOP transmission on Device Tx(Tfwd_init_cmd) is
> > + * 1 second.
> > + */
> > + cmd.busy_timeout = 1000;
> > +
> > + /*
> > + * Refer to UHS-II Addendum Version 1.02 section 6.2.6.3.
> > + * When the number of the DEVICE_INIT commands is reach to
> > + * 30 tiems, Host shall stop issuing DEVICE_INIT command
> > + * and regard it as an error.
> > + */
> > + for (cnt = 0; cnt < 30; cnt++) {
> > + payload[0] = ((dap & 0xF) << 12) |
> > + UHS2_DEV_INIT_COMPLETE_FLAG |
> > + ((gd & 0xF) << 4) |
> > + (gap & 0xF);
> > +
> > + sd_uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg,
> > + payload, UHS2_DEV_INIT_PAYLOAD_LEN,
> > + resp, UHS2_DEV_INIT_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 err;
> > + }
> > +
> > + 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) {
> > + host->uhs2_caps.group_desc = gd;
> > + return 0;
> > + }
> > + resp_gap = resp[4] & 0x0F;
> > + if (gap == resp_gap)
> > + gd++;
> > + }
> > +
> > return 0;
> > }
> >
> > @@ -76,6 +225,52 @@ static int sd_uhs2_dev_init(struct mmc_host *host)
> > */
> > static int sd_uhs2_enum(struct mmc_host *host, u32 *node_id)
> > {
> > + struct mmc_command cmd = {0};
> > + struct uhs2_command uhs2_cmd = {};
> > + u16 header, arg;
> > + __be32 payload[UHS2_DEV_ENUM_PAYLOAD_LEN];
> > + u8 id_f = 0xF, id_l = 0x0;
> > + u8 resp[UHS2_DEV_ENUM_RESP_LEN] = {0};
> > + int err;
> > +
> > + /*
> > + * Refer to UHS-II Addendum Version 1.02 Figure 6-28 to see ENUMERATE CCMD format.
> > + * Header:
> > + * - Control Write(R/W=1) with 4-Byte payload(PLEN=01b).
> > + * - IOADR = CMD_BASE + 003h
> > + * Payload:
> > + * - bit [3:0]: ID_L(Last Node ID)
> > + * - bit [7:4]: ID_F(First Node ID)
> > + */
> > + 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;
> > + payload[0] = cpu_to_be32(payload[0]);
> > +
> > + sd_uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, UHS2_DEV_ENUM_PAYLOAD_LEN,
> > + resp, UHS2_DEV_ENUM_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 err;
> > + }
> > +
> > + 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;
> > + *node_id = id_f;
> > +
> > return 0;
> > }
> >
> > @@ -86,6 +281,181 @@ static int sd_uhs2_enum(struct mmc_host *host, u32 *node_id)
> > */
> > static int sd_uhs2_config_read(struct mmc_host *host, struct mmc_card *card)
> > {
> > + struct mmc_command cmd = {0};
> > + struct uhs2_command uhs2_cmd = {};
> > + u16 header, arg;
> > + u32 cap;
> > + int err;
> > +
> > + /*
> > + * Use Control Read CCMD to read Generic Capability from Configuration Register.
> > + * - Control Write(R/W=1) with 4-Byte payload(PLEN=01b).
> > + * - IOADR = Generic Capability Register(CFG_BASE + 000h)
> > + */
> > + header = UHS2_NATIVE_PACKET | UHS2_PACKET_TYPE_CCMD | card->uhs2_config.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);
> > +
> > + /*
> > + * 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).
> > + */
> > + sd_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 err;
> > + }
> > +
> > + /*
> > + * Generic Capability Register:
> > + * bit [7:0] : Reserved
> > + * bit [13:8] : Device-Specific Number of Lanes and Functionality
> > + * bit 8: 2L-HD
> > + * bit 9: 2D-1U FD
> > + * bit 10: 1D-2U FD
> > + * bit 11: 2D-2U FD
> > + * Others: Reserved
> > + * bit [14] : DADR Length
> > + * 0: 4 bytes
> > + * 1: Reserved
> > + * bit [23:16]: Application Type
> > + * bit 16: 0=Non-SD memory, 1=SD memory
> > + * bit 17: 0=Non-SDIO, 1=SDIO
> > + * bit 18: 0=Card, 1=Embedded
> > + * bit [63:24]: Reserved
> > + */
> > + cap = cmd.resp[0];
> > + card->uhs2_config.n_lanes =
> > + (cap >> UHS2_DEV_CONFIG_N_LANES_POS) &
> > + UHS2_DEV_CONFIG_N_LANES_MASK;
> > + card->uhs2_config.dadr_len =
> > + (cap >> UHS2_DEV_CONFIG_DADR_POS) &
> > + UHS2_DEV_CONFIG_DADR_MASK;
> > + card->uhs2_config.app_type =
> > + (cap >> UHS2_DEV_CONFIG_APP_POS) &
> > + UHS2_DEV_CONFIG_APP_MASK;
> > +
> > + /*
> > + * Use Control Read CCMD to read PHY Capability from Configuration Register.
> > + * - Control Write(R/W=1) with 8-Byte payload(PLEN=10b).
> > + * - IOADR = PHY Capability Register(CFG_BASE + 002h)
> > + */
> > + arg = ((UHS2_DEV_CONFIG_PHY_CAPS & 0xFF) << 8) |
> > + UHS2_NATIVE_CMD_READ |
> > + UHS2_NATIVE_CMD_PLEN_8B |
> > + (UHS2_DEV_CONFIG_PHY_CAPS >> 8);
> > +
> > + sd_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 err;
> > + }
> > +
> > + /*
> > + * PHY Capability Register:
> > + * bit [3:0] : PHY Minor Revision
> > + * bit [5:4] : PHY Major Revision
> > + * bit [15] : Support Hibernate Mode
> > + * 0: Not support Hibernate Mode
> > + * 1: Support Hibernate Mode
> > + * bit [31:16]: Reserved
> > + * bit [35:32]: Device-Specific N_LSS_SYN
> > + * bit [39:36]: Device-Specific N_LSS_DIR
> > + * bit [63:40]: Reserved
> > + */
> > + cap = cmd.resp[0];
> > + card->uhs2_config.phy_minor_rev =
> > + cap & UHS2_DEV_CONFIG_PHY_MINOR_MASK;
> > + card->uhs2_config.phy_major_rev =
> > + (cap >> UHS2_DEV_CONFIG_PHY_MAJOR_POS) &
> > + UHS2_DEV_CONFIG_PHY_MAJOR_MASK;
> > + card->uhs2_config.can_hibernate =
> > + (cap >> UHS2_DEV_CONFIG_CAN_HIBER_POS) &
> > + UHS2_DEV_CONFIG_CAN_HIBER_MASK;
> > +
> > + cap = cmd.resp[1];
> > + card->uhs2_config.n_lss_sync =
> > + cap & UHS2_DEV_CONFIG_N_LSS_SYN_MASK;
> > + card->uhs2_config.n_lss_dir =
> > + (cap >> UHS2_DEV_CONFIG_N_LSS_DIR_POS) &
> > + UHS2_DEV_CONFIG_N_LSS_DIR_MASK;
> > + if (card->uhs2_config.n_lss_sync == 0)
> > + card->uhs2_config.n_lss_sync = 16 << 2;
> > + else
> > + card->uhs2_config.n_lss_sync <<= 2;
> > +
> > + if (card->uhs2_config.n_lss_dir == 0)
> > + card->uhs2_config.n_lss_dir = 16 << 3;
> > + else
> > + card->uhs2_config.n_lss_dir <<= 3;
> > +
> > + /*
> > + * Use Control Read CCMD to read LINK/TRAN Capability from Configuration Register.
> > + * - Control Write(R/W=1) with 8-Byte payload(PLEN=10b).
> > + * - IOADR = LINK/TRAN Capability Register(CFG_BASE + 004h)
> > + */
> > + 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);
> > +
> > + sd_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 err;
> > + }
> > +
> > + /*
> > + * LINK/TRAN Capability Register:
> > + * bit [3:0] : LINK_TRAN Minor Revision
> > + * bit [5:4] : LINK/TRAN Major Revision
> > + * bit [7:6] : Reserved
> > + * bit [15:8] : Device-Specific N_FCU
> > + * bit [18:16]: Device Type
> > + * 001b=Host
> > + * 010b=Device
> > + * 011b=Reserved for CMD issuable Device
> > + * bit [19] : Reserved
> > + * bit [31:20]: Device-Specific MAX_BLKLEN
> > + * bit [39:32]: Device-Specific N_DATA_GAP
> > + * bit [63:40]: Reserved
> > + */
> > + cap = cmd.resp[0];
> > + card->uhs2_config.link_minor_rev =
> > + cap & UHS2_DEV_CONFIG_LT_MINOR_MASK;
> > + card->uhs2_config.link_major_rev =
> > + (cap >> UHS2_DEV_CONFIG_LT_MAJOR_POS) &
> > + UHS2_DEV_CONFIG_LT_MAJOR_MASK;
> > + card->uhs2_config.n_fcu =
> > + (cap >> UHS2_DEV_CONFIG_N_FCU_POS) &
> > + UHS2_DEV_CONFIG_N_FCU_MASK;
> > + card->uhs2_config.dev_type =
> > + (cap >> UHS2_DEV_CONFIG_DEV_TYPE_POS) &
> > + UHS2_DEV_CONFIG_DEV_TYPE_MASK;
> > + card->uhs2_config.maxblk_len =
> > + (cap >> UHS2_DEV_CONFIG_MAX_BLK_LEN_POS) &
> > + UHS2_DEV_CONFIG_MAX_BLK_LEN_MASK;
> > +
> > + cap = cmd.resp[1];
> > + card->uhs2_config.n_data_gap =
> > + cap & UHS2_DEV_CONFIG_N_DATA_GAP_MASK;
> > + if (card->uhs2_config.n_fcu == 0)
> > + card->uhs2_config.n_fcu = 256;
> > +
> > return 0;
> > }
> >
> > @@ -100,26 +470,357 @@ static int sd_uhs2_config_read(struct mmc_host *host, struct mmc_card *card)
> > */
> > static int sd_uhs2_config_write(struct mmc_host *host, struct mmc_card *card)
> > {
> > + struct mmc_command cmd = {0};
> > + struct uhs2_command uhs2_cmd = {};
> > + u16 header, arg;
> > + __be32 payload[UHS2_CFG_WRITE_PAYLOAD_LEN];
> > + u8 nMinDataGap;
> > + int err;
> > + u8 resp[5] = {0};
> > +
> > + /*
> > + * Use Control Write CCMD to set Generic Setting in Configuration Register.
> > + * - Control Write(R/W=1) with 8-Byte payload(PLEN=10b).
> > + * - IOADR = Generic Setting Register(CFG_BASE + 008h)
> > + * - Payload = New contents to be written to Generic Setting Register
> > + */
> > + header = UHS2_NATIVE_PACKET | UHS2_PACKET_TYPE_CCMD | card->uhs2_config.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);
> > +
> > + /*
> > + * Most UHS-II cards only support FD and 2L-HD mode. Other lane numbers
> > + * defined in UHS-II addendem Ver1.01 are optional.
> > + */
> > + host->uhs2_caps.n_lanes_set = UHS2_DEV_CONFIG_GEN_SET_2L_FD_HD;
> > + card->uhs2_config.n_lanes_set = UHS2_DEV_CONFIG_GEN_SET_2L_FD_HD;
> > +
> > + payload[0] = card->uhs2_config.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]);
> > +
> > + /*
> > + * 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).
> > + */
> > + sd_uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, UHS2_CFG_WRITE_PAYLOAD_LEN,
> > + 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 err;
> > + }
> > +
> > + /*
> > + * Use Control Write CCMD to set PHY Setting in Configuration Register.
> > + * - Control Write(R/W=1) with 8-Byte payload(PLEN=10b).
> > + * - IOADR = PHY Setting Register(CFG_BASE + 00Ah)
> > + * - Payload = New contents to be written to PHY Setting Register
> > + */
> > + arg = ((UHS2_DEV_CONFIG_PHY_SET & 0xFF) << 8) |
> > + UHS2_NATIVE_CMD_WRITE |
> > + UHS2_NATIVE_CMD_PLEN_8B |
> > + (UHS2_DEV_CONFIG_PHY_SET >> 8);
> > +
> > + if (host->uhs2_caps.speed_range == UHS2_DEV_CONFIG_PHY_SET_SPEED_B) {
> > + if (card->uhs2_config.n_lanes == UHS2_DEV_CONFIG_2L_HD_FD &&
> > + host->uhs2_caps.n_lanes == UHS2_DEV_CONFIG_2L_HD_FD) {
> > + /* Support HD */
> > + host->ios.timing = MMC_TIMING_UHS2_SPEED_B_HD;
> > + nMinDataGap = 1;
> > + } else {
> > + /* Only support 2L-FD so far */
> > + host->ios.timing = MMC_TIMING_UHS2_SPEED_B;
> > + nMinDataGap = 3;
> > + }
> > + card->uhs2_config.speed_range_set = UHS2_DEV_CONFIG_PHY_SET_SPEED_B;
> > + } else {
> > + if (card->uhs2_config.n_lanes == UHS2_DEV_CONFIG_2L_HD_FD &&
> > + host->uhs2_caps.n_lanes == UHS2_DEV_CONFIG_2L_HD_FD) {
> > + /* Support HD */
> > + host->ios.timing = MMC_TIMING_UHS2_SPEED_A_HD;
> > + nMinDataGap = 1;
> > + } else {
> > + /* Only support 2L-FD so far */
> > + host->ios.timing = MMC_TIMING_UHS2_SPEED_A;
> > + nMinDataGap = 3;
> > + }
> > + card->uhs2_config.speed_range_set = UHS2_DEV_CONFIG_PHY_SET_SPEED_A;
> > + }
> > +
> > + payload[0] = card->uhs2_config.speed_range_set << UHS2_DEV_CONFIG_PHY_SET_SPEED_POS;
> > +
> > + card->uhs2_config.n_lss_sync_set = (max(card->uhs2_config.n_lss_sync,
> > + host->uhs2_caps.n_lss_sync) >> 2) &
> > + UHS2_DEV_CONFIG_N_LSS_SYN_MASK;
> > + host->uhs2_caps.n_lss_sync_set = card->uhs2_config.n_lss_sync_set;
> > +
> > + card->uhs2_config.n_lss_dir_set = (max(card->uhs2_config.n_lss_dir,
> > + host->uhs2_caps.n_lss_dir) >> 3) &
> > + UHS2_DEV_CONFIG_N_LSS_DIR_MASK;
> > + host->uhs2_caps.n_lss_dir_set = card->uhs2_config.n_lss_dir_set;
> > +
> > + payload[1] = (card->uhs2_config.n_lss_dir_set << UHS2_DEV_CONFIG_N_LSS_DIR_POS) |
> > + card->uhs2_config.n_lss_sync_set;
> > + payload[0] = cpu_to_be32(payload[0]);
> > + payload[1] = cpu_to_be32(payload[1]);
> > +
> > + memset(resp, 0, sizeof(resp));
> > +
> > + sd_uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, UHS2_CFG_WRITE_PAYLOAD_LEN,
> > + resp, UHS2_CFG_WRITE_PHY_SET_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 err;
> > + }
> > +
> > + if ((resp[2] & 0x80)) {
> > + pr_err("%s: %s: UHS2 CMD not accepted, resp= 0x%x!\n",
> > + mmc_hostname(host), __func__, resp[2]);
> > + return -EIO;
> > + }
> > +
> > + /*
> > + * Use Control Write CCMD to set LINK/TRAN Setting in Configuration Register.
> > + * - Control Write(R/W=1) with 8-Byte payload(PLEN=10b).
> > + * - IOADR = LINK/TRAN Setting Register(CFG_BASE + 00Ch)
> > + * - Payload = New contents to be written to LINK/TRAN Setting Register
> > + */
> > + 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);
> > +
> > + if (card->uhs2_config.app_type == UHS2_DEV_CONFIG_APP_SD_MEM)
> > + card->uhs2_config.maxblk_len_set = UHS2_DEV_CONFIG_LT_SET_MAX_BLK_LEN;
> > + else
> > + card->uhs2_config.maxblk_len_set = min(card->uhs2_config.maxblk_len,
> > + host->uhs2_caps.maxblk_len);
> > + host->uhs2_caps.maxblk_len_set = card->uhs2_config.maxblk_len_set;
> > +
> > + card->uhs2_config.n_fcu_set = min(card->uhs2_config.n_fcu, host->uhs2_caps.n_fcu);
> > + host->uhs2_caps.n_fcu_set = card->uhs2_config.n_fcu_set;
> > +
> > + card->uhs2_config.n_data_gap_set = max(nMinDataGap, card->uhs2_config.n_data_gap);
> > + host->uhs2_caps.n_data_gap_set = card->uhs2_config.n_data_gap_set;
> > +
> > + host->uhs2_caps.max_retry_set = 3;
> > + card->uhs2_config.max_retry_set = host->uhs2_caps.max_retry_set;
> > +
> > + payload[0] = (card->uhs2_config.maxblk_len_set << UHS2_DEV_CONFIG_MAX_BLK_LEN_POS) |
> > + (card->uhs2_config.max_retry_set << UHS2_DEV_CONFIG_LT_SET_MAX_RETRY_POS) |
> > + (card->uhs2_config.n_fcu_set << UHS2_DEV_CONFIG_N_FCU_POS);
> > + payload[1] = card->uhs2_config.n_data_gap_set;
> > + payload[0] = cpu_to_be32(payload[0]);
> > + payload[1] = cpu_to_be32(payload[1]);
> > +
> > + sd_uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, UHS2_CFG_WRITE_PAYLOAD_LEN,
> > + 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 err;
> > + }
> > +
> > + /*
> > + * Use Control Write CCMD to set Config Completion(payload bit 63) in Generic Setting
> > + * Register.
> > + * Header:
> > + * - Control Write(R/W=1) with 8-Byte payload(PLEN=10b).
> > + * - IOADR = PGeneric Setting Register(CFG_BASE + 008h)
> > + * Payload:
> > + * - bit [63]: Config Completion
> > + *
> > + * DLSM transits to Active state immediately when Config Completion is set to 1.
> > + */
> > + arg = ((UHS2_DEV_CONFIG_GEN_SET & 0xFF) << 8) |
> > + UHS2_NATIVE_CMD_WRITE |
> > + UHS2_NATIVE_CMD_PLEN_8B |
> > + (UHS2_DEV_CONFIG_GEN_SET >> 8);
> > +
> > + 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]);
> > +
> > + memset(resp, 0, sizeof(resp));
> > + sd_uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, UHS2_CFG_WRITE_PAYLOAD_LEN,
> > + resp, UHS2_CFG_WRITE_GENERIC_SET_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 err;
> > + }
> > +
> > + /* Set host Config Setting registers */
> > + err = host->ops->uhs2_control(host, UHS2_SET_CONFIG);
> > + if (err) {
> > + pr_err("%s: %s: UHS2 SET_CONFIG fail!\n", mmc_hostname(host), __func__);
> > + return err;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int sd_uhs2_go_dormant(struct mmc_host *host, u32 node_id)
> > +{
> > + struct mmc_command cmd = {0};
> > + struct uhs2_command uhs2_cmd = {};
> > + u16 header, arg;
> > + __be32 payload[1];
> > + int err;
> > +
> > + /* Disable Normal INT */
> > + err = host->ops->uhs2_control(host, UHS2_DISABLE_INT);
> > + if (err) {
> > + pr_err("%s: %s: UHS2 DISABLE_INT fail!\n",
> > + mmc_hostname(host), __func__);
> > + return err;
> > + }
> > +
> > + /*
> > + * Refer to UHS-II Addendum Version 1.02 Figure 6-17 to see GO_DORMANT_STATE CCMD format.
> > + * Header:
> > + * - Control Write(R/W=1) with 4-Byte payload(PLEN=01b).
> > + * - IOADR = CMD_BASE + 001h
> > + * Payload:
> > + * - bit [7]: HBR(Entry to Hibernate Mode)
> > + * 1: Host intends to enter Hibernate mode during Dormant state.
> > + * The default setting is 0 because hibernate is currently not supported.
> > + */
> > + header = UHS2_NATIVE_PACKET | UHS2_PACKET_TYPE_CCMD | 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);
> > +
> > + sd_uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, payload, UHS2_GO_DORMANT_PAYLOAD_LEN,
> > + 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 err;
> > + }
> > +
> > + /* Check Dormant State in Present */
> > + err = host->ops->uhs2_control(host, UHS2_CHECK_DORMANT);
> > + if (err)
> > + return err;
> > +
> > + /* Disable UHS2 card clock */
> > + err = host->ops->uhs2_control(host, UHS2_DISABLE_CLK);
> > + if (err)
> > + return err;
> > +
> > + /* Restore sd clock */
> > + mmc_delay(5);
> > + err = host->ops->uhs2_control(host, UHS2_ENABLE_CLK);
> > + if (err)
> > + return err;
> > +
> > + /* Enable Normal INT */
> > + err = host->ops->uhs2_control(host, UHS2_ENABLE_INT);
> > + if (err)
> > + return err;
> > +
> > + /* Detect UHS2 */
> > + err = host->ops->uhs2_control(host, UHS2_PHY_INIT);
> > + if (err)
> > + return err;
> > +
> > 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, struct mmc_card *card)
> > +static int __sd_uhs2_wait_active_state_cb(void *cb_data, bool *busy)
> > {
> > + struct sd_uhs2_wait_active_state_data *data = cb_data;
> > + struct mmc_host *host = data->host;
> > + struct mmc_command *cmd = data->cmd;
> > + int err;
> > +
> > + err = mmc_wait_for_cmd(host, cmd, 0);
> > + if (err)
> > + return err;
> > +
> > + if (cmd->resp[1] & UHS2_DEV_CONFIG_GEN_SET_CFG_COMPLETE)
> > + *busy = false;
> > + else
> > + *busy = true;
> > +
> > return 0;
> > }
> >
> > +static int sd_uhs2_go_dormant_state(struct mmc_host *host, u32 node_id)
> > +{
> > + struct mmc_command cmd = {0};
> > + struct uhs2_command uhs2_cmd = {};
> > + u16 header, arg;
> > + int err;
> > + struct sd_uhs2_wait_active_state_data cb_data = {
> > + .host = host,
> > + .cmd = &cmd
> > + };
> > +
> > + err = sd_uhs2_go_dormant(host, node_id);
> > + if (err) {
> > + pr_err("%s: %s: UHS2 GO_DORMANT_STATE fail, err= 0x%x!\n",
> > + mmc_hostname(host), __func__, err);
> > + return err;
> > + }
> > +
> > + /*
> > + * Use Control Read CCMD to check Config Completion(bit 63) in Generic Setting Register.
> > + * - Control Read(R/W=0) with 8-Byte payload(PLEN=10b).
> > + * - IOADR = Generic Setting Register(CFG_BASE + 008h)
> > + *
> > + * When UHS-II card been switched to new speed mode, it will set Config Completion to 1.
> > + */
> > + header = UHS2_NATIVE_PACKET | UHS2_PACKET_TYPE_CCMD | node_id;
> > + arg = ((UHS2_DEV_CONFIG_GEN_SET & 0xFF) << 8) |
> > + UHS2_NATIVE_CMD_READ |
> > + UHS2_NATIVE_CMD_PLEN_8B |
> > + (UHS2_DEV_CONFIG_GEN_SET >> 8);
> > +
> > + sd_uhs2_cmd_assemble(&cmd, &uhs2_cmd, header, arg, NULL, 0, NULL, 0);
> > + err = __mmc_poll_for_busy(host, UHS2_WAIT_CFG_COMPLETE_PERIOD_US,
> > + UHS2_WAIT_CFG_COMPLETE_TIMEOUT_MS,
> > + &__sd_uhs2_wait_active_state_cb, &cb_data);
> > + if (err) {
> > + pr_err("%s: %s: Not switch to Active in 100 ms\n", mmc_hostname(host), __func__);
> > + return err;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static void sd_uhs2_remove(struct mmc_host *host)
> > +{
> > + mmc_remove_card(host->card);
> > + host->card = NULL;
> > +}
> > +
> > /*
> > * Allocate the data structure for the mmc_card and run the UHS-II specific
> > * initialization sequence.
> > */
> > -static int sd_uhs2_init_card(struct mmc_host *host)
> > +static int sd_uhs2_init_card(struct mmc_host *host, struct mmc_card *oldcard)
> > {
> > struct mmc_card *card;
> > u32 node_id;
> > @@ -133,9 +834,14 @@ static int sd_uhs2_init_card(struct mmc_host *host)
> > if (err)
> > return err;
> >
> > - card = mmc_alloc_card(host, &sd_type);
> > - if (IS_ERR(card))
> > - return PTR_ERR(card);
> > + if (oldcard) {
> > + card = oldcard;
> > + } else {
> > + card = mmc_alloc_card(host, &sd_type);
> > + if (IS_ERR(card))
> > + return PTR_ERR(card);
> > + }
> > + host->card = card;
> >
> > card->uhs2_config.node_id = node_id;
> > card->type = MMC_TYPE_SD;
> > @@ -148,18 +854,226 @@ static int sd_uhs2_init_card(struct mmc_host *host)
> > if (err)
> > goto err;
> >
> > - host->card = card;
> > + /* If change speed to Range B, need to GO_DORMANT_STATE */
> > + if (host->ios.timing == MMC_TIMING_UHS2_SPEED_B ||
> > + host->ios.timing == MMC_TIMING_UHS2_SPEED_B_HD) {
> > + err = sd_uhs2_go_dormant_state(host, node_id);
> > + if (err)
> > + return err;
> > + }
> > +
> > + host->flags |= MMC_UHS2_SD_TRAN;
> > +
> > return 0;
> >
> > err:
> > - mmc_remove_card(card);
> > + sd_uhs2_remove(host);
> > return err;
> > }
> >
> > -static void sd_uhs2_remove(struct mmc_host *host)
> > +int sd_uhs2_reinit(struct mmc_host *host)
> > {
> > - mmc_remove_card(host->card);
> > - host->card = NULL;
> > + struct mmc_card *card = host->card;
> > + int err;
> > +
> > + sd_uhs2_power_up(host);
> > + err = sd_uhs2_phy_init(host);
> > + if (err)
> > + return err;
> > +
> > + err = sd_uhs2_init_card(host, card);
> > + if (err)
> > + return err;
> > +
> > + mmc_card_set_present(card);
> > + return err;
> > +}
> > +
> > +/*
> > + * Mask off any voltages we don't support and select
> > + * the lowest voltage
> > + */
> > +u32 sd_uhs2_select_voltage(struct mmc_host *host, u32 ocr)
> > +{
> > + int bit;
> > + int err;
> > +
> > + /*
> > + * Sanity check the voltages that the card claims to
> > + * support.
> > + */
> > + if (ocr & 0x7F) {
> > + dev_warn(mmc_dev(host), "card claims to support voltages below defined range\n");
> > + ocr &= ~0x7F;
> > + }
> > +
> > + ocr &= host->ocr_avail;
> > + if (!ocr) {
> > + dev_warn(mmc_dev(host), "no support for card's volts\n");
> > + return 0;
> > + }
> > +
> > + if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) {
> > + bit = ffs(ocr) - 1;
> > + ocr &= 3 << bit;
> > + /* Power cycle */
> > + err = sd_uhs2_power_off(host);
> > + if (err)
> > + return 0;
> > + err = sd_uhs2_reinit(host);
> > + if (err)
> > + return 0;
> > + } else {
> > + bit = fls(ocr) - 1;
> > + ocr &= 3 << bit;
> > + if (bit != host->ios.vdd)
> > + dev_warn(mmc_dev(host), "exceeding card's volts\n");
> > + }
> > +
> > + return ocr;
> > +}
> > +
> > +/*
> > + * 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, struct mmc_card *card)
> > +{
> > + int err;
> > + u32 cid[4];
> > + u32 ocr;
> > + u32 rocr;
> > + u8 *status;
> > + int ro;
> > +
> > + /* Send CMD0 to reset SD card */
> > + err = __mmc_go_idle(host);
> > + if (err)
> > + return err;
> > +
> > + mmc_delay(1);
> > +
> > + /* Send CMD8 to communicate SD interface operation condition */
> > + err = mmc_send_if_cond(host, host->ocr_avail);
> > + if (err) {
> > + dev_warn(mmc_dev(host), "CMD8 error\n");
> > + goto err;
> > + }
> > +
> > + /*
> > + * Probe SD card working voltage.
> > + */
> > + err = mmc_send_app_op_cond(host, 0, &ocr);
> > + if (err)
> > + goto err;
> > +
> > + card->ocr = ocr;
> > +
> > + /*
> > + * 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 = sd_uhs2_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;
> > +
> > + rocr |= (SD_OCR_CCS | SD_OCR_XPC);
> > +
> > + /* Wait SD power on ready */
> > + ocr = rocr;
> > +
> > + err = mmc_send_app_op_cond(host, ocr, &rocr);
> > + if (err)
> > + goto err;
> > +
> > + err = mmc_send_cid(host, cid);
> > + if (err)
> > + goto err;
> > +
> > + memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
> > + mmc_decode_cid(card);
> > +
> > + /*
> > + * For native busses: get card RCA and quit open drain mode.
> > + */
> > + err = mmc_send_relative_addr(host, &card->rca);
> > + if (err)
> > + goto err;
> > +
> > + err = mmc_sd_get_csd(card);
> > + if (err)
> > + goto err;
> > +
> > + /*
> > + * Select card, as all following commands rely on that.
> > + */
> > + err = mmc_select_card(card);
> > + if (err)
> > + goto err;
> > +
> > + /*
> > + * Fetch SCR from card.
> > + */
> > + err = mmc_app_send_scr(card);
> > + if (err)
> > + goto err;
> > +
> > + err = mmc_decode_scr(card);
> > + if (err)
> > + goto err;
> > +
> > + /*
> > + * Switch to high power consumption mode.
> > + * Even switch failed, sd card can still work at lower power consumption mode, but
> > + * performance will be lower than high power consumption mode.
> > + */
> > + status = kmalloc(64, GFP_KERNEL);
> > + if (!status)
> > + return -ENOMEM;
> > +
> > + if (!(card->csd.cmdclass & CCC_SWITCH)) {
> > + pr_warn("%s: card lacks mandatory switch function, performance might suffer\n",
> > + mmc_hostname(card->host));
> > + } else {
> > + /* send CMD6 to set Maximum Power Consumption to get better performance */
> > + err = mmc_sd_switch(card, 0, 3, SD4_SET_POWER_LIMIT_1_80W, status);
> > + if (!err)
> > + err = mmc_sd_switch(card, 1, 3, SD4_SET_POWER_LIMIT_1_80W, status);
> > +
> > + err = 0;
> > + }
> > +
> > + /*
> > + * Check if read-only switch is active.
> > + */
> > + ro = mmc_sd_get_ro(host);
> > + if (ro < 0) {
> > + pr_warn("%s: host does not support read-only switch, assuming write-enable\n",
> > + mmc_hostname(host));
> > + } else if (ro > 0) {
> > + mmc_card_set_readonly(card);
> > + }
> > +
> > + /*
> > + * NOTE:
> > + * Should we read Externsion Register to check power notification feature here?
> > + */
> > +
> > + kfree(status);
> > +
> > + return 0;
> > +
> > +err:
> > + sd_uhs2_remove(host);
> > + return err;
> > }
> >
> > static int sd_uhs2_alive(struct mmc_host *host)
> > @@ -181,38 +1095,181 @@ static void sd_uhs2_detect(struct mmc_host *host)
> > mmc_claim_host(host);
> > mmc_detach_bus(host);
> > sd_uhs2_power_off(host);
> > + host->flags &= ~MMC_UHS2_SUPPORT;
> > mmc_release_host(host);
> > }
> > }
> >
> > +static int _sd_uhs2_suspend(struct mmc_host *host)
> > +{
> > + struct mmc_card *card = host->card;
> > + int err = 0;
> > +
> > + mmc_claim_host(host);
> > +
> > + if (mmc_card_suspended(card))
> > + goto out;
> > +
> > + if (mmc_sd_can_poweroff_notify(card))
> > + err = sd_poweroff_notify(card);
> > +
> > + if (!err) {
> > + sd_uhs2_power_off(host);
> > + mmc_card_set_suspended(card);
> > + }
> > +
> > +out:
> > + mmc_release_host(host);
> > + return err;
> > +}
> > +
> > +/*
> > + * Callback for suspend
> > + */
> > static int sd_uhs2_suspend(struct mmc_host *host)
> > {
> > - return 0;
> > + int err;
> > +
> > + err = _sd_uhs2_suspend(host);
> > + if (!err) {
> > + pm_runtime_disable(&host->card->dev);
> > + pm_runtime_set_suspended(&host->card->dev);
> > + }
> > +
> > + return err;
> > }
> >
> > +/*
> > + * This function tries to determine if the same card is still present
> > + * and, if so, restore all state to it.
> > + */
> > +static int _mmc_sd_uhs2_resume(struct mmc_host *host)
> > +{
> > + int err = 0;
> > +
> > + mmc_claim_host(host);
> > +
> > + if (!mmc_card_suspended(host->card))
> > + goto out;
> > +
> > + /* Power up UHS2 SD card and re-initialize it. */
> > + err = sd_uhs2_reinit(host);
> > + mmc_card_clr_suspended(host->card);
> > +
> > +out:
> > + mmc_release_host(host);
> > + return err;
> > +}
> > +
> > +/*
> > + * Callback for resume
> > + */
> > static int sd_uhs2_resume(struct mmc_host *host)
> > {
> > + pm_runtime_enable(&host->card->dev);
> > return 0;
> > }
> >
> > +/*
> > + * Callback for runtime_suspend.
> > + */
> > static int sd_uhs2_runtime_suspend(struct mmc_host *host)
> > {
> > - return 0;
> > + int err;
> > +
> > + if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
> > + return 0;
> > +
> > + err = _sd_uhs2_suspend(host);
> > + if (err)
> > + pr_err("%s: error %d doing aggressive suspend\n", mmc_hostname(host), err);
> > +
> > + return err;
> > }
> >
> > static int sd_uhs2_runtime_resume(struct mmc_host *host)
> > {
> > - return 0;
> > + int err;
> > +
> > + err = _mmc_sd_uhs2_resume(host);
> > + if (err && err != -ENOMEDIUM)
> > + pr_err("%s: error %d doing runtime resume\n", mmc_hostname(host), err);
> > +
> > + return err;
> > }
> >
> > -static int sd_uhs2_shutdown(struct mmc_host *host)
> > +static int sd_uhs2_hw_reset(struct mmc_host *host)
> > {
> > - return 0;
> > + int err;
> > +
> > + sd_uhs2_power_off(host);
> > + /* Wait at least 1 ms according to SD spec */
> > + mmc_delay(1);
> > + sd_uhs2_power_up(host);
> > +
> > + err = sd_uhs2_reinit(host);
> > +
> > + return err;
> > }
> >
> > -static int sd_uhs2_hw_reset(struct mmc_host *host)
> > +/*
> > + * mmc_uhs2_prepare_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
> > + */
> > +void mmc_uhs2_prepare_cmd(struct mmc_host *host, struct mmc_request *mrq)
> > {
> > - return 0;
> > + struct mmc_command *cmd;
> > + struct uhs2_command *uhs2_cmd;
> > + u16 header, arg;
> > + __be32 *payload;
> > + u8 plen;
> > +
> > + cmd = mrq->cmd;
> > + header = host->card->uhs2_config.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->uhs2_app_cmd) {
> > + arg |= UHS2_SD_CMD_APP;
> > + host->uhs2_app_cmd = false;
> > + }
> > +
> > + 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 (mmc_card_uhs2_hd_mode(host))
> > + 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] = cpu_to_be32(cmd->data->blksz);
> > + } else {
> > + payload[1] = cpu_to_be32(cmd->data->blocks);
> > + }
> > + } else {
> > + plen = 1;
> > + }
> > +
> > + payload[0] = cpu_to_be32(cmd->arg);
> > + sd_uhs2_cmd_assemble(cmd, uhs2_cmd, header, arg, payload, plen, NULL, 0);
> > }
> >
> > static const struct mmc_bus_ops sd_uhs2_ops = {
> > @@ -223,7 +1280,7 @@ static const struct mmc_bus_ops sd_uhs2_ops = {
> > .resume = sd_uhs2_resume,
> > .runtime_suspend = sd_uhs2_runtime_suspend,
> > .runtime_resume = sd_uhs2_runtime_resume,
> > - .shutdown = sd_uhs2_shutdown,
> > + .shutdown = sd_uhs2_suspend,
> > .hw_reset = sd_uhs2_hw_reset,
> > };
> >
> > @@ -231,6 +1288,8 @@ static int sd_uhs2_attach(struct mmc_host *host)
> > {
> > int err;
> >
> > + host->flags |= MMC_UHS2_SUPPORT;
> > +
> > err = sd_uhs2_power_up(host);
> > if (err)
> > goto err;
> > @@ -239,7 +1298,7 @@ static int sd_uhs2_attach(struct mmc_host *host)
> > if (err)
> > goto err;
> >
> > - err = sd_uhs2_init_card(host);
> > + err = sd_uhs2_init_card(host, NULL);
> > if (err)
> > goto err;
> >
> > @@ -256,21 +1315,32 @@ static int sd_uhs2_attach(struct mmc_host *host)
> > goto remove_card;
> >
> > mmc_claim_host(host);
> > +
> > return 0;
> >
> > remove_card:
> > - mmc_remove_card(host->card);
> > - host->card = NULL;
> > + sd_uhs2_remove(host);
> > mmc_claim_host(host);
> > - mmc_detach_bus(host);
> > +
> > err:
> > + mmc_detach_bus(host);
> > sd_uhs2_power_off(host);
> > + host->flags &= ~MMC_UHS2_SUPPORT;
> > return err;
> > }
> >
> > +/**
> > + * mmc_attach_sd_uhs2 - select UHS2 interface
> > + * @host: MMC host
> > + *
> > + * 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_attach_sd_uhs2(struct mmc_host *host)
> > {
> > - int i, err = 0;
> > + int i, err;
> >
> > if (!(host->caps2 & MMC_CAP2_SD_UHS2))
> > return -EOPNOTSUPP;
> > @@ -285,6 +1355,9 @@ int mmc_attach_sd_uhs2(struct mmc_host *host)
> > */
> > for (i = 0; i < ARRAY_SIZE(sd_uhs2_freqs); i++) {
> > host->f_init = sd_uhs2_freqs[i];
> > + pr_info("%s: %s: trying to init UHS-II card at %u Hz\n",
> > + mmc_hostname(host), __func__, host->f_init);
> > +
> > err = sd_uhs2_attach(host);
> > if (!err)
> > break;
>
