[PATCH V5 06/26] mmc: core: Support UHS-II card control and access
From: Victor Shih
Date: Wed Oct 19 2022 - 07:40:12 EST
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 V5:
- Added uhs2_tmode0_flag in mmc_blk_rw_rq_prep: block.c
- Added mechanism for confirming the completion of Card initialization
in mmc_start_request: core.c
- Added mechanism for confirming the completion of Card initialization
in mmc_cqe_start_req: core.c
- Added uhs2_tmode0_flag in mmc_send_adtc_data: mmc_ops.c
- Added mechanism for confirming the completion of Card initialization
in mmc_app_cmd: sd_ops.c
- Added uhs2_tmode0_flag in mmc_app_send_scr: sd_ops.c
- Added uhs2_tmode0_flag in mmc_app_sd_status: sd_ops.c
- Added UHS2_PHY_INIT of uhs2_control for detect UHS2
in sd_uhs2_go_dormant: sd_uhs2.c
- Modified the ocr/rocr flow in sd_uhs2_legacy_init: sd_uhs2.c
- Added mmc_decode_cid in sd_uhs2_legacy_init: sd_uhs2.c
- Added remove MMC_UHS2_INITIALIZED of host->flags
in sd_uhs2_remove: sd_uhs2.c
- Added MMC_UHS2_INITIALIZED of host->flags and MMC_UHS2_INITIALIZED of
host->card->uhs2_state in sd_uhs2_init_card: sd_uhs2.c
- Added MMC_UHS2_SUPPORT of host->flags in sd_uhs2_attach: sd_uhs2.c
Update in V4:
1. Rename sd_uhs2_prepare_cmd() into mmc_uhs2_prepare_cmd().
2. Rename ->uhs2_host_operation() into ->uhs2_control().
3. Declare ->uhs2_set_ios() which should be implemented in
mmc/host/sdhci-uhs2.c.
4. Implement call back functions in sd_uhs2_ops.
5. Replace variables which are used as constant with constant
definition.
6. Change data type of uhs2_cmd->payload from u32 to __be32 because of
the use of cpu_to_be32().
7. Add comments to explain format of UHS-II CMD Header and Argument.
8. Add comments to explain format of UHS-II CMD response.
9. Remove unnecessary debug info.
10. Use sd_uhs2_select_voltage() to replace mmc_select_voltage().
11. Use __mmc_poll_for_busy() to replace while loop.
12. Add processing of uhs2_cmd when starting request.
13. Use macro 'mmc_card_can_poweroff_notify' to replace function
"sd_can_poweroff_notify()" and put it to include/linux/mmc/card.h.
14. Embed UHS-II access functionality into the MMC request processing
flow.
Update in V3:
UHS-II card initialization flow is divided into 2 categories: PHY & Card.
Part 1 - PHY Initialization:
Every host controller may need their own avtivation operation to
establish LINK between controller and card. So we add a new member
function(uhs2_detect_init) in struct mmc_host_ops for host controller
use.
Part 2 - Card Initialization:
This part can be divided into 6 substeps.
1. Send UHS-II CCMD DEVICE_INIT to card.
2. Send UHS-II CCMD ENUMERATE to card.
3. Send UHS-II Native Read CCMD to obtain capabilities in CFG_REG of
card.
4. Host compares capabilities of host controller and card, then write
the negotiated values to Setting field in CFG_REG of card through
UHS-II Native Write CCMD.
5. Switch host controller's clock to Range B if it is supported by both
host controller and card.
6. Execute legacy SD initialization flow.
Part 3 - Provide a function to tranaform legacy SD command packet into
UHS-II SD-TRAN DCMD packet.
Most of the code added above came from Intel's original patch[5].
[5]
https://patchwork.kernel.org/project/linux-mmc/patch/1419672479-30852-2-
git-send-email-yi.y.sun@xxxxxxxxx/
---
drivers/mmc/core/block.c | 6 +-
drivers/mmc/core/core.c | 32 +
drivers/mmc/core/mmc_ops.c | 25 +-
drivers/mmc/core/mmc_ops.h | 1 +
drivers/mmc/core/sd.c | 11 +-
drivers/mmc/core/sd.h | 3 +
drivers/mmc/core/sd_ops.c | 18 +
drivers/mmc/core/sd_ops.h | 3 +
drivers/mmc/core/sd_uhs2.c | 1165 +++++++++++++++++++++++++++++++++++-
9 files changed, 1217 insertions(+), 47 deletions(-)
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index db6d8a099910..8245f59e6033 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -1609,6 +1609,9 @@ 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->uhs2_state & MMC_UHS2_INITIALIZED) ? true : false;
mmc_blk_data_prep(mq, mqrq, recovery_mode, &do_rel_wr, &do_data_tag);
@@ -1619,7 +1622,7 @@ 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.
*/
@@ -1632,6 +1635,7 @@ 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 8818a20571f7..025b8017f13d 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -335,6 +335,8 @@ 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);
@@ -352,6 +354,20 @@ int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
if (err)
return err;
+ if (host->card) {
+ if (host->card->uhs2_state & MMC_UHS2_INITIALIZED) {
+ uhs2_cmd.payload = payload;
+ mrq->cmd->uhs2_cmd = &uhs2_cmd;
+ mmc_uhs2_prepare_cmd(host, mrq);
+ }
+ } else {
+ if (host->flags & MMC_UHS2_INITIALIZED) {
+ uhs2_cmd.payload = payload;
+ mrq->cmd->uhs2_cmd = &uhs2_cmd;
+ mmc_uhs2_prepare_cmd(host, mrq);
+ }
+ }
+
led_trigger_event(host->led, LED_FULL);
__mmc_start_request(host, mrq);
@@ -431,6 +447,8 @@ 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;
/*
@@ -451,6 +469,20 @@ int mmc_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq)
if (err)
goto out_err;
+ if (host->card) {
+ if (host->card->uhs2_state & MMC_UHS2_INITIALIZED) {
+ uhs2_cmd.payload = payload;
+ mrq->cmd->uhs2_cmd = &uhs2_cmd;
+ mmc_uhs2_prepare_cmd(host, mrq);
+ }
+ } else {
+ if (host->flags & MMC_UHS2_INITIALIZED) {
+ uhs2_cmd.payload = payload;
+ mrq->cmd->uhs2_cmd = &uhs2_cmd;
+ mmc_uhs2_prepare_cmd(host, mrq);
+ }
+ }
+
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 81c55bfd6e0c..daa1f4ccd99a 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 3662bf5320ce..cab4725209c1 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;
@@ -1611,11 +1611,6 @@ 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;
@@ -1639,7 +1634,7 @@ 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;
@@ -1687,7 +1682,7 @@ static int _mmc_sd_suspend(struct mmc_host *host)
if (mmc_card_suspended(card))
goto out;
- if (sd_can_poweroff_notify(card))
+ if (mmc_card_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..b573a809a0f4 100644
--- a/drivers/mmc/core/sd.h
+++ b/drivers/mmc/core/sd.h
@@ -17,4 +17,7 @@ int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
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..85af5a2ea8ff 100644
--- a/drivers/mmc/core/sd_ops.c
+++ b/drivers/mmc/core/sd_ops.c
@@ -27,6 +27,22 @@ 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 (card) {
+ if (card->uhs2_state & MMC_UHS2_INITIALIZED) {
+ host->uhs2_ios.is_APP_CMD = true;
+ return 0;
+ }
+ } else {
+ if (host->flags & MMC_UHS2_INITIALIZED) {
+ host->uhs2_ios.is_APP_CMD = true;
+ return 0;
+ }
+ }
+
cmd.opcode = MMC_APP_CMD;
if (card) {
@@ -281,6 +297,7 @@ 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 +361,7 @@ 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..29c802dec988 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 +20,12 @@ 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);
#endif
diff --git a/drivers/mmc/core/sd_uhs2.c b/drivers/mmc/core/sd_uhs2.c
index 800957f74632..bccdd4283a67 100644
--- a/drivers/mmc/core/sd_uhs2.c
+++ b/drivers/mmc/core/sd_uhs2.c
@@ -1,48 +1,125 @@
// 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>
+ *
* 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 };
+int sd_uhs2_reinit(struct mmc_host *host);
-static int sd_uhs2_set_ios(struct mmc_host *host)
+/*
+ * Internal function that does the actual ios call to the host driver,
+ * optionally printing some debug output.
+ */
+static inline int sd_uhs2_set_ios(struct mmc_host *host)
{
struct mmc_ios *ios = &host->ios;
+ pr_debug("%s: clock %uHz powermode %u Vdd %u timing %u\n",
+ mmc_hostname(host), ios->clock, ios->power_mode, ios->vdd, ios->timing);
+
return host->ops->uhs2_set_ios(host, ios);
}
static int sd_uhs2_power_up(struct mmc_host *host)
{
+ int err;
+
+ if (host->ios.power_mode == MMC_POWER_ON)
+ return 0;
+
host->ios.vdd = fls(host->ocr_avail) - 1;
host->ios.clock = host->f_init;
host->ios.timing = MMC_TIMING_SD_UHS2;
- host->ios.power_mode = MMC_POWER_UP;
+ host->ios.power_mode = MMC_POWER_ON;
- return sd_uhs2_set_ios(host);
+ err = sd_uhs2_set_ios(host);
+
+ mmc_delay(host->uhs2_ios.power_delay_ms);
+
+ return err;
}
-static void sd_uhs2_power_off(struct mmc_host *host)
+static int sd_uhs2_power_off(struct mmc_host *host)
{
+ if (host->ios.power_mode == MMC_POWER_OFF)
+ return 0;
+
host->ios.vdd = 0;
host->ios.clock = 0;
host->ios.timing = MMC_TIMING_LEGACY;
host->ios.power_mode = MMC_POWER_OFF;
- sd_uhs2_set_ios(host);
+ return sd_uhs2_set_ios(host);
+}
+
+/**
+ * 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;
}
/*
@@ -52,7 +129,15 @@ static void 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;
}
/*
@@ -61,6 +146,88 @@ 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++;
+ }
+ if (cnt == 30) {
+ pr_err("%s: DEVICE_INIT fail, already 30 times!\n",
+ mmc_hostname(host));
+ return -EIO;
+ }
+
return 0;
}
@@ -71,6 +238,52 @@ 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;
}
@@ -81,6 +294,181 @@ 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;
}
@@ -95,9 +483,407 @@ 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);
+
+ 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->uhs2_ios.is_2L_HD_mode = true;
+ nMinDataGap = 1;
+ } else {
+ /* Only support 2L-FD so far */
+ host->uhs2_ios.is_2L_HD_mode = false;
+ nMinDataGap = 3;
+ }
+
+ /*
+ * 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) {
+ card->uhs2_state |= MMC_UHS2_SPEED_B;
+ card->uhs2_config.speed_range_set =
+ UHS2_DEV_CONFIG_PHY_SET_SPEED_B;
+ } else {
+ card->uhs2_config.speed_range_set = UHS2_DEV_CONFIG_PHY_SET_SPEED_A;
+ card->uhs2_state &= ~MMC_UHS2_SPEED_B;
+ }
+
+ 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;
+}
+
+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_change_speed(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
+ };
+
+ /* Change Speed Range at controller side. */
+ err = host->ops->uhs2_control(host, UHS2_SET_SPEED_B);
+ if (err) {
+ pr_err("%s: %s: UHS2 SET_SPEED fail!\n", mmc_hostname(host), __func__);
+ return err;
+ }
+
+ 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 int sd_uhs2_get_ro(struct mmc_host *host)
+{
+ /*
+ * Some systems don't feature a write-protect pin and don't need one.
+ * E.g. because they only have micro-SD card slot. For those systems
+ * assume that the SD card is always read-write.
+ */
+ if (host->caps2 & MMC_CAP2_NO_WRITE_PROTECT)
+ return 0;
+
+ if (!host->ops->get_ro)
+ return -1;
+
+ return host->ops->get_ro(host);
+}
+
+/*
+ * 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.
@@ -107,14 +893,143 @@ static int sd_uhs2_config_write(struct mmc_host *host, struct mmc_card *card)
*/
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[64];
+ 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");
+ return err;
+ }
+
+ /*
+ * Probe SD card working voltage.
+ */
+ err = mmc_send_app_op_cond(host, 0, &ocr);
+ if (err)
+ return 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)
+ return err;
+
+ err = mmc_send_cid(host, cid);
+ if (err)
+ return 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)
+ return err;
+
+ err = mmc_sd_get_csd(card);
+ if (err)
+ return err;
+
+ /*
+ * Select card, as all following commands rely on that.
+ */
+ err = mmc_select_card(card);
+ if (err)
+ return err;
+
+ /*
+ * Fetch SCR from card.
+ */
+ err = mmc_app_send_scr(card);
+ if (err)
+ return err;
+
+ err = mmc_decode_scr(card);
+ if (err)
+ return 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.
+ */
+ 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 = sd_uhs2_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?
+ */
+
return 0;
}
+static void sd_uhs2_remove(struct mmc_host *host)
+{
+ mmc_remove_card(host->card);
+ host->card = NULL;
+ if (host->flags & MMC_UHS2_INITIALIZED)
+ host->flags &= ~MMC_UHS2_INITIALIZED;
+}
+
/*
* 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;
@@ -128,9 +1043,14 @@ 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;
@@ -143,22 +1063,47 @@ static int sd_uhs2_init_card(struct mmc_host *host)
if (err)
goto err;
+ /* Change to Speed Range B if it is supported */
+ if (card->uhs2_state & MMC_UHS2_SPEED_B) {
+ err = sd_uhs2_change_speed(host, node_id);
+ if (err)
+ return err;
+ }
+
+ host->card->uhs2_state |= MMC_UHS2_INITIALIZED;
+ host->flags |= MMC_UHS2_INITIALIZED;
+
err = sd_uhs2_legacy_init(host, card);
if (err)
goto err;
- host->card = card;
return 0;
err:
- mmc_remove_card(card);
+ if (host->card->uhs2_state & MMC_UHS2_INITIALIZED)
+ host->card->uhs2_state &= ~MMC_UHS2_INITIALIZED;
+ if (host->flags & MMC_UHS2_INITIALIZED)
+ host->flags &= ~MMC_UHS2_INITIALIZED;
+ 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;
}
static int sd_uhs2_alive(struct mmc_host *host)
@@ -184,34 +1129,176 @@ static void sd_uhs2_detect(struct mmc_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_card_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_ios.is_APP_CMD) {
+ arg |= UHS2_SD_CMD_APP;
+ host->uhs2_ios.is_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 (host->uhs2_ios.is_2L_HD_mode)
+ 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 = {
@@ -222,7 +1309,7 @@ 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,
};
@@ -230,6 +1317,8 @@ 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;
@@ -238,7 +1327,7 @@ 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;
@@ -251,21 +1340,34 @@ static int sd_uhs2_attach(struct mmc_host *host)
goto remove_card;
mmc_claim_host(host);
+
+ host->ops->uhs2_control(host, UHS2_POST_ATTACH_SD);
+
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);
- return err;
+ host->flags &= ~MMC_UHS2_SUPPORT;
+ return 1;
}
+/**
+ * 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;
@@ -280,6 +1382,9 @@ 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;
--
2.25.1