From: AKASHI Takahiro <takahiro.akashi@linaro.org>
To: ulf.hansson@linaro.org, adrian.hunter@intel.com
Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
ben.chuang@genesyslogic.com.tw, greg.tu@genesyslogic.com.tw,
AKASHI Takahiro <takahiro.akashi@linaro.org>
Subject: [RFC PATCH v3.1 06/27] mmc: core: UHS-II support, generate UHS-II SD command packet
Date: Fri, 6 Nov 2020 11:27:05 +0900 [thread overview]
Message-ID: <20201106022726.19831-7-takahiro.akashi@linaro.org> (raw)
In-Reply-To: <20201106022726.19831-1-takahiro.akashi@linaro.org>
In SD-TRAN protocol, legacy SD commands should be "encapsulated" in SD
packets as described in SD specification.
Please see section 7.1 and 7.2.1 in "UHS-II Simplified Addendum."
Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
---
drivers/mmc/core/core.c | 18 +++++++++++
drivers/mmc/core/uhs2.c | 70 +++++++++++++++++++++++++++++++++++++++++
drivers/mmc/core/uhs2.h | 1 +
3 files changed, 89 insertions(+)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index a08cb1c0f6d2..ac43e93033e6 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -337,6 +337,8 @@ 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;
+ u32 payload[4]; /* for maximum size */
int err;
init_completion(&mrq->cmd_completion);
@@ -354,6 +356,13 @@ int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
if (err)
return err;
+ if (host->flags & MMC_UHS2_SUPPORT &&
+ host->flags & MMC_UHS2_INITIALIZED) {
+ uhs2_cmd.payload = payload;
+ mrq->cmd->uhs2_cmd = &uhs2_cmd;
+ uhs2_prepare_sd_cmd(host, mrq);
+ }
+
led_trigger_event(host->led, LED_FULL);
__mmc_start_request(host, mrq);
@@ -433,6 +442,8 @@ 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;
+ u32 payload[4]; /* for maximum size */
int err;
/*
@@ -453,6 +464,13 @@ int mmc_cqe_start_req(struct mmc_host *host, struct mmc_request *mrq)
if (err)
goto out_err;
+ if (host->flags & MMC_UHS2_SUPPORT &&
+ host->flags & MMC_UHS2_INITIALIZED) {
+ uhs2_cmd.payload = payload;
+ mrq->cmd->uhs2_cmd = &uhs2_cmd;
+ uhs2_prepare_sd_cmd(host, mrq);
+ }
+
err = host->cqe_ops->cqe_request(host, mrq);
if (err)
goto out_err;
diff --git a/drivers/mmc/core/uhs2.c b/drivers/mmc/core/uhs2.c
index acb46b5b57ef..1f6d0e0cf355 100644
--- a/drivers/mmc/core/uhs2.c
+++ b/drivers/mmc/core/uhs2.c
@@ -807,3 +807,73 @@ int mmc_uhs2_rescan_try_freq(struct mmc_host *host, unsigned int freq)
return err;
}
EXPORT_SYMBOL_GPL(mmc_uhs2_rescan_try_freq);
+
+/**
+ * uhs2_prepare_sd_cmd - prepare for SD command packet
+ * @host: MMC host
+ * @mrq: MMC request
+ *
+ * Initialize and fill in a header and a payload of SD command packet.
+ * The caller should allocate uhs2_command in host->cmd->uhs2_cmd in
+ * advance.
+ *
+ * Return: 0 on success, non-zero error on failure
+ */
+int uhs2_prepare_sd_cmd(struct mmc_host *host, struct mmc_request *mrq)
+{
+ struct mmc_command *cmd;
+ struct uhs2_command *uhs2_cmd;
+ u16 header = 0, arg = 0;
+ u32 *payload;
+ u8 plen = 0;
+
+ cmd = mrq->cmd;
+ header = host->uhs2_dev_prop.node_id;
+ if ((cmd->flags & MMC_CMD_MASK) == MMC_CMD_ADTC)
+ header |= UHS2_PACKET_TYPE_DCMD;
+ else
+ header |= UHS2_PACKET_TYPE_CCMD;
+
+ arg = cmd->opcode << UHS2_SD_CMD_INDEX_POS;
+
+ uhs2_cmd = cmd->uhs2_cmd;
+ payload = uhs2_cmd->payload;
+ plen = 2; /* at the maximum */
+
+ if ((cmd->flags & MMC_CMD_MASK) == MMC_CMD_ADTC &&
+ !cmd->uhs2_tmode0_flag) {
+ if (host->flags & MMC_UHS2_2L_HD)
+ arg |= UHS2_DCMD_2L_HD_MODE;
+
+ arg |= UHS2_DCMD_LM_TLEN_EXIST;
+
+ if (cmd->data->blocks == 1 &&
+ cmd->data->blksz != 512 &&
+ cmd->opcode != MMC_READ_SINGLE_BLOCK &&
+ cmd->opcode != MMC_WRITE_BLOCK) {
+ arg |= UHS2_DCMD_TLUM_BYTE_MODE;
+ payload[1] = uhs2_dcmd_convert_msb(cmd->data->blksz);
+ } else {
+ payload[1] = uhs2_dcmd_convert_msb(cmd->data->blocks);
+ }
+
+ if (cmd->opcode == SD_IO_RW_EXTENDED) {
+ arg &= ~(UHS2_DCMD_LM_TLEN_EXIST |
+ UHS2_DCMD_TLUM_BYTE_MODE |
+ UHS2_NATIVE_DCMD_DAM_IO);
+ payload[1] = 0;
+ plen = 1;
+ }
+ } else {
+ plen = 1;
+ }
+
+ payload[0] = uhs2_dcmd_convert_msb(cmd->arg);
+ pr_debug("%s: %s: sd_cmd->arg = 0x%x, payload[0]= 0x%x.\n",
+ mmc_hostname(host), __func__, cmd->arg, payload[0]);
+
+ uhs2_cmd_assemble(cmd, uhs2_cmd, header, arg, payload, plen, NULL, 0);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(uhs2_prepare_sd_cmd);
diff --git a/drivers/mmc/core/uhs2.h b/drivers/mmc/core/uhs2.h
index e3389d4dda3b..48486ba21062 100644
--- a/drivers/mmc/core/uhs2.h
+++ b/drivers/mmc/core/uhs2.h
@@ -16,5 +16,6 @@
#define UHS2_PHY_INIT_ERR 1
int mmc_uhs2_rescan_try_freq(struct mmc_host *host, unsigned int freq);
+int uhs2_prepare_sd_cmd(struct mmc_host *host, struct mmc_request *mrq);
#endif /* MMC_UHS2_H */
--
2.28.0
next prev parent reply other threads:[~2020-11-06 2:28 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-06 2:26 [RFC PATCH v3.1 00/27] Add support UHS-II for GL9755 AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 01/27] mmc: add UHS-II related definitions in public headers AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 02/27] mmc: core: UHS-II support, modify power-up sequence AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 03/27] mmc: core: UHS-II support, skip set_chip_select() AKASHI Takahiro
2020-11-10 7:15 ` Bough Chen
2020-11-06 2:27 ` [RFC PATCH v3.1 04/27] mmc: core: UHS-II support, try to select UHS-II interface AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 05/27] mmc: core: UHS-II support, skip TMODE setup in some cases AKASHI Takahiro
2020-11-06 2:27 ` AKASHI Takahiro [this message]
2020-11-06 2:27 ` [RFC PATCH v3.1 07/27] mmc: core: UHS-II support, set APP_CMD bit if necessary AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 08/27] mmc: sdhci: add a kernel configuration for enabling UHS-II support AKASHI Takahiro
2020-11-26 8:14 ` Adrian Hunter
2020-11-30 5:17 ` AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 09/27] mmc: sdhci: add UHS-II related definitions in headers AKASHI Takahiro
2020-11-26 8:15 ` Adrian Hunter
2020-11-30 5:21 ` AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 10/27] mmc: sdhci: add UHS-II module AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 11/27] mmc: sdhci-uhs2: dump UHS-II registers AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 12/27] mmc: sdhci-uhs2: add reset function AKASHI Takahiro
2020-11-26 8:16 ` Adrian Hunter
2020-11-30 6:20 ` AKASHI Takahiro
2020-11-30 7:37 ` Adrian Hunter
2020-11-06 2:27 ` [RFC PATCH v3.1 13/27] mmc: sdhci-uhs2: add set_power() to support vdd2 AKASHI Takahiro
2020-11-26 8:16 ` Adrian Hunter
2020-11-30 7:15 ` AKASHI Takahiro
2020-11-30 7:44 ` Adrian Hunter
2020-11-06 2:27 ` [RFC PATCH v3.1 14/27] mmc: sdhci-uhs2: skip signal_voltage_switch() AKASHI Takahiro
2020-11-26 8:16 ` Adrian Hunter
2020-11-30 7:38 ` AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 15/27] mmc: sdhci-uhs2: add set_timeout() AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 16/27] mmc: sdhci-uhs2: add set_ios() AKASHI Takahiro
2020-11-26 8:17 ` Adrian Hunter
2020-11-30 7:51 ` AKASHI Takahiro
2020-12-03 9:51 ` Adrian Hunter
2020-11-06 2:27 ` [RFC PATCH v3.1 17/27] mmc: sdhci-uhs2: add detect_init() to detect the interface AKASHI Takahiro
2020-11-26 8:17 ` Adrian Hunter
2020-12-01 2:25 ` AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 18/27] mmc: sdhci-uhs2: add clock operations AKASHI Takahiro
2020-11-26 8:17 ` Adrian Hunter
2020-12-01 2:27 ` AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 19/27] mmc: sdhci-uhs2: add set_reg() to initialise the interface AKASHI Takahiro
2020-11-26 8:18 ` Adrian Hunter
2020-12-01 2:28 ` AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 20/27] mmc: sdhci-uhs2: add request() and others AKASHI Takahiro
2020-11-26 8:18 ` Adrian Hunter
2020-12-01 2:40 ` AKASHI Takahiro
2020-12-01 11:24 ` Adrian Hunter
2020-11-06 2:27 ` [RFC PATCH v3.1 21/27] mmc: sdhci-uhs2: add irq() " AKASHI Takahiro
2020-12-01 16:46 ` Adrian Hunter
2020-12-08 7:37 ` AKASHI Takahiro
2020-12-08 8:37 ` Adrian Hunter
2020-11-06 2:27 ` [RFC PATCH v3.1 22/27] mmc: sdhci-uhs2: add add_host() and others to set up the driver AKASHI Takahiro
2020-12-03 9:42 ` Adrian Hunter
2020-12-08 7:42 ` AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 23/27] mmc: sdhci-uhs2: add pre-detect_init hook AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 24/27] mmc: core: add post-mmc_attach_sd hook AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 25/27] mmc: sdhci-uhs2: " AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 26/27] mmc: sdhci-pci: add UHS-II support framework AKASHI Takahiro
2020-11-06 2:27 ` [RFC PATCH v3.1 27/27] mmc: sdhci-pci-gli: enable UHS-II mode for GL9755 AKASHI Takahiro
2020-11-25 7:41 ` [RFC PATCH v3.1 00/27] Add support UHS-II " AKASHI Takahiro
2020-11-25 10:43 ` Ulf Hansson
2020-11-26 0:06 ` AKASHI Takahiro
2020-11-26 8:18 ` Adrian Hunter
2020-12-01 3:09 ` AKASHI Takahiro
2020-12-03 9:55 ` Adrian Hunter
2020-12-08 7:58 ` AKASHI Takahiro
2020-12-08 8:48 ` Adrian Hunter
2020-12-03 10:02 ` Adrian Hunter
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