[RFC PATCH v2 2/6] mmc: core: Add UHS-II support in core layer
From: Ben Chuang
Date: Thu Jan 09 2020 - 04:14:01 EST
From: Ben Chuang <ben.chuang@xxxxxxxxxxxxxxxxxxx>
Add UHS-II support in core layer
Signed-off-by: Ben Chuang <ben.chuang@xxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/core/Makefile | 3 +-
drivers/mmc/core/block.c | 7 +-
drivers/mmc/core/bus.c | 5 +-
drivers/mmc/core/core.c | 65 ++-
drivers/mmc/core/core.h | 3 +-
drivers/mmc/core/regulator.c | 14 +
drivers/mmc/core/sd.c | 27 +-
drivers/mmc/core/sd_ops.c | 12 +
drivers/mmc/core/uhs2.c | 992 +++++++++++++++++++++++++++++++++++
drivers/mmc/core/uhs2.h | 23 +
10 files changed, 1139 insertions(+), 12 deletions(-)
create mode 100644 drivers/mmc/core/uhs2.c
create mode 100644 drivers/mmc/core/uhs2.h
diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile
index 95ffe008ebdf..ddfda7a234cb 100644
--- a/drivers/mmc/core/Makefile
+++ b/drivers/mmc/core/Makefile
@@ -8,7 +8,8 @@ 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
+ slot-gpio.o regulator.o \
+ 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/block.c b/drivers/mmc/core/block.c
index 95b41c0891d0..c5f6bfd05d49 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -56,6 +56,7 @@
#include "mmc_ops.h"
#include "quirks.h"
#include "sd_ops.h"
+#include "uhs2.h"
MODULE_ALIAS("mmc:block");
#ifdef MODULE_PARAM_PREFIX
@@ -1551,6 +1552,9 @@ 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_INITIALIZED) ? true : false;
mmc_blk_data_prep(mq, mqrq, disable_multi, &do_rel_wr, &do_data_tag);
@@ -1561,7 +1565,7 @@ 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.
*/
@@ -1574,6 +1578,7 @@ 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/bus.c b/drivers/mmc/core/bus.c
index 74de3f2dda38..c1cd1079c186 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -336,8 +336,9 @@ int mmc_add_card(struct mmc_card *card)
} else {
pr_info("%s: new %s%s%s%s%s%s card at address %04x\n",
mmc_hostname(card->host),
- mmc_card_uhs(card) ? "ultra high speed " :
- (mmc_card_hs(card) ? "high speed " : ""),
+ mmc_card_uhs2(card) ? "ultra high speed 2 " :
+ (mmc_card_uhs(card) ? "ultra high speed 1 " :
+ (mmc_card_hs(card) ? "high speed " : "")),
mmc_card_hs400(card) ? "HS400 " :
(mmc_card_hs200(card) ? "HS200 " : ""),
mmc_card_hs400es(card) ? "Enhanced strobe " : "",
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index abf8f5eb0a1c..8f64dbaea5e6 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -31,6 +31,7 @@
#include <linux/mmc/mmc.h>
#include <linux/mmc/sd.h>
#include <linux/mmc/slot-gpio.h>
+#include <linux/mmc/uhs2.h>
#define CREATE_TRACE_POINTS
#include <trace/events/mmc.h>
@@ -41,6 +42,7 @@
#include "host.h"
#include "sdio_bus.h"
#include "pwrseq.h"
+#include "uhs2.h"
#include "mmc_ops.h"
#include "sd_ops.h"
@@ -51,6 +53,7 @@
#define SD_DISCARD_TIMEOUT_MS (250)
static const unsigned freqs[] = { 400000, 300000, 200000, 100000 };
+static const unsigned int uhs2_freqs[] = { 52000000, 26000000 };
/*
* Enabling software CRCs on the data blocks can be a significant (30%)
@@ -329,6 +332,11 @@ static int mmc_mrq_prep(struct mmc_host *host, struct mmc_request *mrq)
}
}
+ if ((host->flags & MMC_UHS2_SUPPORT) &&
+ (host->flags & MMC_UHS2_INITIALIZED) &&
+ (mrq->cmd->uhs2_cmd == NULL))
+ uhs2_prepare_sd_cmd(host, mrq);
+
return 0;
}
@@ -433,6 +441,14 @@ void mmc_wait_for_req_done(struct mmc_host *host, struct mmc_request *mrq)
__mmc_start_request(host, mrq);
}
+ if (cmd && cmd->uhs2_cmd) {
+ pr_debug("%s: %s free uhs2_cmd!\n",
+ mmc_hostname(host), __func__);
+ kfree(cmd->uhs2_cmd->payload);
+ kfree(cmd->uhs2_cmd);
+ cmd->uhs2_cmd = NULL;
+ }
+
mmc_retune_release(host);
}
EXPORT_SYMBOL(mmc_wait_for_req_done);
@@ -897,7 +913,7 @@ EXPORT_SYMBOL(mmc_put_card);
* Internal function that does the actual ios call to the host driver,
* optionally printing some debug output.
*/
-static inline void mmc_set_ios(struct mmc_host *host)
+void mmc_set_ios(struct mmc_host *host)
{
struct mmc_ios *ios = &host->ios;
@@ -909,14 +925,17 @@ static inline void mmc_set_ios(struct mmc_host *host)
host->ops->set_ios(host, ios);
}
+EXPORT_SYMBOL(mmc_set_ios);
/*
* Control chip select pin on a host.
*/
void mmc_set_chip_select(struct mmc_host *host, int mode)
{
- host->ios.chip_select = mode;
- mmc_set_ios(host);
+ if (!(host->flags & MMC_UHS2_INITIALIZED)) {
+ host->ios.chip_select = mode;
+ mmc_set_ios(host);
+ }
}
/*
@@ -1332,6 +1351,11 @@ void mmc_power_up(struct mmc_host *host, u32 ocr)
if (host->ios.power_mode == MMC_POWER_ON)
return;
+ if (host->flags & MMC_UHS2_SUPPORT) {
+ uhs2_power_up(host);
+ return;
+ }
+
mmc_pwrseq_pre_power_on(host);
host->ios.vdd = fls(ocr) - 1;
@@ -2194,9 +2218,11 @@ static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
if (!mmc_attach_sdio(host))
return 0;
- if (!(host->caps2 & MMC_CAP2_NO_SD))
- if (!mmc_attach_sd(host))
+ if (!(host->caps2 & MMC_CAP2_NO_SD)) {
+ /* set false for SD card */
+ if (!mmc_attach_sd(host, false))
return 0;
+ }
if (!(host->caps2 & MMC_CAP2_NO_MMC))
if (!mmc_attach_mmc(host))
@@ -2278,6 +2304,7 @@ void mmc_rescan(struct work_struct *work)
struct mmc_host *host =
container_of(work, struct mmc_host, detect.work);
int i;
+ int err;
if (host->rescan_disable)
return;
@@ -2329,6 +2356,28 @@ void mmc_rescan(struct work_struct *work)
goto out;
}
+ if (host->caps & MMC_CAP_UHS2) {
+ /*
+ * Start to try UHS-II initialization from 52MHz to 26MHz
+ * (RCLK range) per spec.
+ */
+ for (i = 0; i < ARRAY_SIZE(uhs2_freqs); i++) {
+ err = mmc_uhs2_try_frequency(host,
+ max(uhs2_freqs[i], host->f_min));
+ if (!err) {
+ mmc_release_host(host);
+ goto out;
+ } else if (err == UHS2_PHY_INIT_ERR)
+ /* UHS2 IF detect or Lane Sync error.
+ * Try legacy interface.
+ */
+ break;
+
+ if (uhs2_freqs[i] <= host->f_min)
+ break;
+ }
+ }
+
for (i = 0; i < ARRAY_SIZE(freqs); i++) {
if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min)))
break;
@@ -2350,7 +2399,11 @@ void mmc_start_host(struct mmc_host *host)
if (!(host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)) {
mmc_claim_host(host);
- mmc_power_up(host, host->ocr_avail);
+
+ /* Power up here will make UHS2 init ugly. */
+ if (!(host->caps & MMC_CAP_UHS2))
+ mmc_power_up(host, host->ocr_avail);
+
mmc_release_host(host);
}
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
index 575ac0257af2..1fb10c341b43 100644
--- a/drivers/mmc/core/core.h
+++ b/drivers/mmc/core/core.h
@@ -76,7 +76,7 @@ int _mmc_detect_card_removed(struct mmc_host *host);
int mmc_detect_card_removed(struct mmc_host *host);
int mmc_attach_mmc(struct mmc_host *host);
-int mmc_attach_sd(struct mmc_host *host);
+int mmc_attach_sd(struct mmc_host *host, bool flag_uhs2);
int mmc_attach_sdio(struct mmc_host *host);
/* Module parameters */
@@ -124,6 +124,7 @@ int __mmc_claim_host(struct mmc_host *host, struct mmc_ctx *ctx,
void mmc_release_host(struct mmc_host *host);
void mmc_get_card(struct mmc_card *card, struct mmc_ctx *ctx);
void mmc_put_card(struct mmc_card *card, struct mmc_ctx *ctx);
+void mmc_set_ios(struct mmc_host *host);
/**
* mmc_claim_host - exclusively claim a host
diff --git a/drivers/mmc/core/regulator.c b/drivers/mmc/core/regulator.c
index b6febbcf8978..f9a643f653fe 100644
--- a/drivers/mmc/core/regulator.c
+++ b/drivers/mmc/core/regulator.c
@@ -236,6 +236,7 @@ int mmc_regulator_get_supply(struct mmc_host *mmc)
mmc->supply.vmmc = devm_regulator_get_optional(dev, "vmmc");
mmc->supply.vqmmc = devm_regulator_get_optional(dev, "vqmmc");
+ mmc->supply.vmmc2 = devm_regulator_get_optional(dev, "vmmc2");
if (IS_ERR(mmc->supply.vmmc)) {
if (PTR_ERR(mmc->supply.vmmc) == -EPROBE_DEFER)
@@ -255,6 +256,19 @@ int mmc_regulator_get_supply(struct mmc_host *mmc)
dev_dbg(dev, "No vqmmc regulator found\n");
}
+ if (IS_ERR(mmc->supply.vmmc2)) {
+ if (PTR_ERR(mmc->supply.vmmc2) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_dbg(dev, "No vmmc2 regulator found\n");
+ } else {
+ ret = mmc_regulator_get_ocrmask(mmc->supply.vmmc2);
+ if (ret > 0)
+ mmc->ocr_avail_uhs2 = ret;
+ else
+ dev_warn(dev, "Failed getting UHS2 OCR mask: %d\n",
+ ret);
+ }
+
return 0;
}
EXPORT_SYMBOL_GPL(mmc_regulator_get_supply);
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index fe914ff5f5d6..b079f3f164fe 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -877,6 +877,19 @@ int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
err = mmc_read_switch(card);
if (err)
return err;
+ if (host->flags & MMC_UHS2_INITIALIZED) {
+ u8 status[64];
+ /*
+ * send CMD6 to set Maximum Power Consumption
+ * to get better performance
+ */
+ err = mmc_sd_switch(card, 0, 3,
+ SD_SET_CURRENT_LIMIT_1000, status);
+ if (!err) {
+ err = mmc_sd_switch(card, 1, 3,
+ SD_SET_CURRENT_LIMIT_1000, status);
+ }
+ }
}
/*
@@ -1019,6 +1032,11 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
if (err)
goto free_card;
+ /* For UHS2, skip the UHS-I initialization. */
+ if ((host->flags & MMC_UHS2_SUPPORT) &&
+ (host->flags & MMC_UHS2_INITIALIZED))
+ goto done;
+
/*
* If the card has not been power cycled, it may still be using 1.8V
* signaling. Detect that situation and try to initialize a UHS-I (1.8V)
@@ -1266,7 +1284,7 @@ static const struct mmc_bus_ops mmc_sd_ops = {
/*
* Starting point for SD card init.
*/
-int mmc_attach_sd(struct mmc_host *host)
+int mmc_attach_sd(struct mmc_host *host, bool flag_uhs2)
{
int err;
u32 ocr, rocr;
@@ -1300,6 +1318,13 @@ int mmc_attach_sd(struct mmc_host *host)
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 (flag_uhs2 && !rocr)
+ rocr = host->ocr_avail;
+
/*
* Can we support the voltage(s) of the card(s)?
*/
diff --git a/drivers/mmc/core/sd_ops.c b/drivers/mmc/core/sd_ops.c
index 22bf528294b9..9dc296356928 100644
--- a/drivers/mmc/core/sd_ops.c
+++ b/drivers/mmc/core/sd_ops.c
@@ -26,6 +26,15 @@ 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_SUPPORT &&
+ host->flags & MMC_UHS2_INITIALIZED) {
+ host->flags |= MMC_UHS2_APP_CMD;
+ return 0;
+ }
+
cmd.opcode = MMC_APP_CMD;
if (card) {
@@ -235,6 +244,7 @@ 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;
@@ -282,6 +292,7 @@ int mmc_sd_switch(struct mmc_card *card, int mode, int group,
cmd.arg &= ~(0xF << (group * 4));
cmd.arg |= value << (group * 4);
cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
+ cmd.uhs2_tmode0_flag = 1;
data.blksz = 64;
data.blocks = 1;
@@ -323,6 +334,7 @@ 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/uhs2.c b/drivers/mmc/core/uhs2.c
new file mode 100644
index 000000000000..43ea155ccc59
--- /dev/null
+++ b/drivers/mmc/core/uhs2.c
@@ -0,0 +1,992 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * linux/drivers/mmc/core/uhs2.c - UHS-II driver
+ *
+ * Copyright (C) 2014 Intel Corp, All Rights Reserved.
+ */
+
+#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 "uhs2.h"
+#include "mmc_ops.h"
+#include "sd_ops.h"
+#include "core.h"
+
+#define DBG(f, x...) \
+ pr_warn("[%s()]: " f, __func__, ## x)
+
+/*
+ * Payload, uhs2_cmd are all allocated which should be freed when
+ * response is got.
+ * 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.
+ */
+int uhs2_cmd_assemble(struct mmc_command *cmd, u16 header, u16 arg,
+ u32 *payload, u8 plen, u8 *resp, u8 resp_len)
+{
+ struct uhs2_command *uhs2_cmd;
+
+ if (cmd == NULL)
+ return -EIO;
+
+ uhs2_cmd = kzalloc(sizeof(struct uhs2_command),
+ GFP_KERNEL);
+ if (!uhs2_cmd) {
+ kfree(payload);
+ return -ENOMEM;
+ }
+
+ 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);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(uhs2_cmd_assemble);
+
+int uhs2_prepare_sd_cmd(struct mmc_host *host, struct mmc_request *mrq)
+{
+ struct mmc_command *cmd;
+ u16 header = 0, arg = 0;
+ u32 *payload;
+ u8 plen = 0;
+ int err = 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;
+ }
+
+ if ((cmd->flags & MMC_CMD_MASK) == MMC_CMD_ADTC &&
+ !cmd->uhs2_tmode0_flag) {
+ payload = kzalloc(2*sizeof(u32), GFP_KERNEL);
+ if (!payload)
+ return -ENOMEM;
+ plen = 8 / sizeof(u32);
+
+ 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 = 4 / sizeof(u32);
+ }
+ } else {
+ payload = kzalloc(1 * sizeof(u32), GFP_KERNEL);
+ if (!payload)
+ return -ENOMEM;
+ plen = 4 / sizeof(u32);
+ }
+
+ 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]);
+
+ err = uhs2_cmd_assemble(cmd, header, arg, payload, plen,
+ NULL, 0);
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(uhs2_prepare_sd_cmd);
+
+/*
+ * Apply power to the UHS2 stack. This is a two-stage process.
+ * First, we enable power to the card without the clock running.
+ * We then wait a bit for the power to stabilise. Finally,
+ * enable the bus drivers and clock to the card.
+ *
+ * We must _NOT_ enable the clock prior to power stablising.
+ *
+ * If a host does all the power sequencing itself, ignore the
+ * initial MMC_POWER_UP stage.
+ */
+void uhs2_power_up(struct mmc_host *host)
+{
+ if (host->ios.power_mode == MMC_POWER_ON)
+ return;
+
+ host->ios.vdd = fls(host->ocr_avail) - 1;
+ host->ios.vdd2 = fls(host->ocr_avail_uhs2) - 1;
+ if (mmc_host_is_spi(host))
+ host->ios.chip_select = MMC_CS_HIGH;
+ else
+ host->ios.chip_select = MMC_CS_DONTCARE;
+ host->ios.clock = host->f_init;
+ host->ios.timing = MMC_TIMING_UHS2;
+ host->ios.power_mode = MMC_POWER_ON;
+ mmc_set_ios(host);
+
+ /*
+ * This delay should be sufficient to allow the power supply
+ * to reach the minimum voltage.
+ */
+ mmc_delay(10);
+}
+EXPORT_SYMBOL_GPL(uhs2_power_up);
+
+static int uhs2_dev_init(struct mmc_host *host)
+{
+ struct mmc_command cmd = {0};
+ u32 cnt;
+ u32 dap, gap, gap1;
+ u16 header = 0, arg = 0;
+ u32 *payload;
+ 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 = kcalloc(plen, sizeof(u32), GFP_KERNEL);
+ if (!payload)
+ return -ENOMEM;
+ payload[0] = ((dap & 0xF) << 12) |
+ (cf << 11) |
+ ((gd & 0xF) << 4) |
+ (gap & 0xF);
+
+ err = uhs2_cmd_assemble(&cmd, header, arg, payload, plen,
+ resp, resp_len);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD assembling err = 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ 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;
+ }
+
+#ifdef 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");
+#endif
+
+ 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;
+}
+
+static int uhs2_enum(struct mmc_host *host)
+{
+ struct mmc_command cmd = {0};
+ u16 header = 0, arg = 0;
+ u32 *payload;
+ 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 = kcalloc(plen, sizeof(u32), GFP_KERNEL);
+ if (!payload)
+ return -ENOMEM;
+ payload[0] = (id_f << 4) | id_l;
+
+ DBG("Begin ENUMERATE, header=0x%x, arg=0x%x, payload=0x%x.\n",
+ header, arg, payload[0]);
+ err = uhs2_cmd_assemble(&cmd, header, arg, payload, plen,
+ resp, resp_len);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD assembling err = 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ 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;
+ }
+
+#ifdef 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");
+#endif
+
+ 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;
+}
+
+static int uhs2_config_read(struct mmc_host *host)
+{
+ struct mmc_command cmd = {0};
+ 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).
+ */
+ err = uhs2_cmd_assemble(&cmd, header, arg, NULL, 0,
+ NULL, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD assembling err = 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ 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;
+ }
+
+#ifdef 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");
+#endif
+
+ 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);
+ err = uhs2_cmd_assemble(&cmd, header, arg, NULL, 0,
+ NULL, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD assembling err = 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ 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;
+ }
+
+#ifdef CONFIG_MMC_DEBUG
+ 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");
+#endif
+
+ 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);
+ err = uhs2_cmd_assemble(&cmd, header, arg, NULL, 0,
+ NULL, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD assembling err = 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ 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;
+ }
+
+#ifdef CONFIG_MMC_DEBUG
+ 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");
+#endif
+
+ 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;
+}
+
+static int uhs2_config_write(struct mmc_host *host)
+{
+ struct mmc_command cmd = {0};
+ u16 header = 0, arg = 0;
+ u32 nTry;
+ u32 *payload;
+ u8 nMinDataGap;
+ u8 plen = 1;
+ 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 = kcalloc(plen, sizeof(u32), GFP_KERNEL);
+ 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).
+ */
+ err = uhs2_cmd_assemble(&cmd, header, arg, payload, plen,
+ NULL, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD assembling err = 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ 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;
+ payload = kcalloc(plen, sizeof(u32), GFP_KERNEL);
+
+ 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));
+
+ err = uhs2_cmd_assemble(&cmd, header, arg,
+ payload, plen, resp, resp_len);
+
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD assembling err = 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ 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;
+ payload = kcalloc(plen, sizeof(u32), GFP_KERNEL);
+
+ 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]);
+
+ err = uhs2_cmd_assemble(&cmd, header, arg, payload, plen,
+ NULL, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD assembling err = 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ 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 = kcalloc(plen, sizeof(u32), GFP_KERNEL);
+ 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));
+ err = uhs2_cmd_assemble(&cmd, header, arg, payload, plen,
+ resp, resp_len);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD assembling err = 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ 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, 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};
+ u16 header = 0, arg = 0;
+ u32 *payload;
+ u8 plen = 1;
+ int err;
+
+ /* Disable Normal INT */
+ if (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);
+
+ payload = kcalloc(plen, sizeof(u32), GFP_KERNEL);
+ if (!payload)
+ return -ENOMEM;
+ 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]);
+ err = uhs2_cmd_assemble(&cmd, header, arg, payload, plen,
+ NULL, 0);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD assembling err = 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ 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, CHECK_DORMANT)) {
+ pr_err("%s: %s: UHS2 GO_DORMANT_STATE fail!\n",
+ mmc_hostname(host), __func__);
+ return -EIO;
+ }
+
+ 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, 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);
+ host->ops->uhs2_enable_clk(host);
+
+ /* Enable Normal INT */
+ if (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)) {
+ pr_err("%s: %s: uhs2_detect_init() fail!\n",
+ mmc_hostname(host), __func__);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+int mmc_uhs2_try_frequency(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);
+
+ uhs2_power_up(host);
+ if (host->ops->uhs2_detect_init(host)) {
+ pr_err("%s: fail to detect UHS2!\n", mmc_hostname(host));
+ err = UHS2_PHY_INIT_ERR;
+ goto init_fail;
+ }
+
+ if (uhs2_dev_init(host)) {
+ pr_err("%s: UHS2 DEVICE_INIT fail!\n", mmc_hostname(host));
+ goto init_fail;
+ }
+
+ if (uhs2_enum(host)) {
+ pr_err("%s: UHS2 ENUMERATE fail!\n", mmc_hostname(host));
+ goto init_fail;
+ }
+
+ if (uhs2_config_read(host)) {
+ pr_err("%s: UHS2 INQUIRY_CONFIG fail!\n", mmc_hostname(host));
+ goto init_fail;
+ }
+
+ if (uhs2_config_write(host)) {
+ pr_err("%s: UHS2 SET_COMMON_CONFIG fail!\n",
+ mmc_hostname(host));
+ goto init_fail;
+ }
+
+ 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));
+ goto init_fail;
+ }
+
+ host->flags |= MMC_UHS2_INITIALIZED;
+
+ mmc_send_if_cond(host, host->ocr_avail);
+
+ /* On market, only can some SD cards support UHS-II so only call SD
+ * attach process here.
+ */
+ err = mmc_attach_sd(host, true);
+
+ if (!err)
+ 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_try_frequency);
+
+int uhs2_abort_trans(struct mmc_host *host)
+{
+ struct mmc_command cmd = {0};
+ u16 header = 0, arg = 0;
+ int err;
+ u8 resp[10] = {0};
+ u8 resp_len = 4;
+
+ header = UHS2_NATIVE_PACKET | UHS2_PACKET_TYPE_CCMD |
+ host->uhs2_dev_prop.node_id;
+
+ arg = ((UHS2_DEV_CMD_TRANS_ABORT & 0xFF) << 8) |
+ UHS2_NATIVE_CMD_WRITE |
+ (UHS2_DEV_CMD_TRANS_ABORT >> 8);
+
+ err = uhs2_cmd_assemble(&cmd, header, arg, NULL, 0,
+ resp, resp_len);
+ if (err) {
+ pr_err("%s: %s: UHS2 CMD assembling err = 0x%x!\n",
+ mmc_hostname(host), __func__, err);
+ return -EIO;
+ }
+
+ 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;
+ }
+
+#ifdef CONFIG_MMC_DEBUG
+ int i;
+
+ pr_warn("%s: Abort Tran response is: ", mmc_hostname(host));
+ for (i = 0; i < 0x4; i++)
+ pr_warn("%s: %02x\n", __func__, resp[i]);
+ pr_warn("\n");
+#endif
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(uhs2_abort_trans);
diff --git a/drivers/mmc/core/uhs2.h b/drivers/mmc/core/uhs2.h
new file mode 100644
index 000000000000..60fecf25db0a
--- /dev/null
+++ b/drivers/mmc/core/uhs2.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * driver/mmc/core/uhs2.h - UHS-II driver
+ *
+ * Header file for UHS-II packets, Host Controller registers and I/O
+ * accessors.
+ *
+ * Copyright (C) 2014 Intel Corp, All Rights Reserved.
+ */
+#ifndef MMC_UHS2_H
+#define MMC_UHS2_H
+
+#include <linux/mmc/core.h>
+#include <linux/mmc/host.h>
+
+#define UHS2_PHY_INIT_ERR 1
+
+extern int uhs2_prepare_sd_cmd(struct mmc_host *host, struct mmc_request *mrq);
+extern void uhs2_power_up(struct mmc_host *host);
+extern int mmc_uhs2_try_frequency(struct mmc_host *host, unsigned int freq);
+extern int uhs2_abort_trans(struct mmc_host *host);
+
+#endif /* MMC_UHS2_H */
--
2.24.1