From: Victor Shih <victorshihgli@gmail.com>
To: ulf.hansson@linaro.org, adrian.hunter@intel.com
Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
benchuanggli@gmail.com, HL.Liu@genesyslogic.com.tw,
Greg.tu@genesyslogic.com.tw, takahiro.akashi@linaro.org,
dlunev@chromium.org,
Victor Shih <victor.shih@genesyslogic.com.tw>,
Ben Chuang <ben.chuang@genesyslogic.com.tw>
Subject: [PATCH V6 13/24] mmc: sdhci-uhs2: add set_timeout()
Date: Tue, 13 Dec 2022 17:00:36 +0800 [thread overview]
Message-ID: <20221213090047.3805-14-victor.shih@genesyslogic.com.tw> (raw)
In-Reply-To: <20221213090047.3805-1-victor.shih@genesyslogic.com.tw>
This is a UHS-II version of sdhci's set_timeout() operation.
Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Victor Shih <victor.shih@genesyslogic.com.tw>
---
drivers/mmc/host/sdhci-uhs2.c | 72 +++++++++++++++++++++++++++++++++++
drivers/mmc/host/sdhci-uhs2.h | 1 +
2 files changed, 73 insertions(+)
diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c
index 2342c05c4cdb..00b1b69b49ea 100644
--- a/drivers/mmc/host/sdhci-uhs2.c
+++ b/drivers/mmc/host/sdhci-uhs2.c
@@ -13,6 +13,7 @@
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/iopoll.h>
+#include <linux/bitfield.h>
#include "sdhci.h"
#include "sdhci-uhs2.h"
@@ -141,6 +142,77 @@ static void sdhci_uhs2_set_power(struct sdhci_host *host, unsigned char mode,
}
}
+static u8 sdhci_calc_timeout_uhs2(struct sdhci_host *host, u8 *cmd_res, u8 *dead_lock)
+{
+ u8 count;
+ unsigned int cmd_res_timeout, dead_lock_timeout, current_timeout;
+ /* timeout in us */
+ cmd_res_timeout = 5 * 1000;
+ dead_lock_timeout = 1 * 1000 * 1000;
+
+ /*
+ * Figure out needed cycles.
+ * We do this in steps in order to fit inside a 32 bit int.
+ * The first step is the minimum timeout, which will have a
+ * minimum resolution of 6 bits:
+ * (1) 2^13*1000 > 2^22,
+ * (2) host->timeout_clk < 2^16
+ * =>
+ * (1) / (2) > 2^6
+ */
+ count = 0;
+ current_timeout = (1 << 13) * 1000 / host->timeout_clk;
+ while (current_timeout < cmd_res_timeout) {
+ count++;
+ current_timeout <<= 1;
+ if (count >= 0xF)
+ break;
+ }
+
+ if (count >= 0xF) {
+ DBG("%s: Too large timeout 0x%x requested for CMD_RES!\n",
+ mmc_hostname(host->mmc), count);
+ count = 0xE;
+ }
+ *cmd_res = count;
+
+ count = 0;
+ current_timeout = (1 << 13) * 1000 / host->timeout_clk;
+ while (current_timeout < dead_lock_timeout) {
+ count++;
+ current_timeout <<= 1;
+ if (count >= 0xF)
+ break;
+ }
+
+ if (count >= 0xF) {
+ DBG("%s: Too large timeout 0x%x requested for DEADLOCK!\n",
+ mmc_hostname(host->mmc), count);
+ count = 0xE;
+ }
+ *dead_lock = count;
+
+ return count;
+}
+
+static void __sdhci_uhs2_set_timeout(struct sdhci_host *host)
+{
+ u8 cmd_res, dead_lock;
+
+ sdhci_calc_timeout_uhs2(host, &cmd_res, &dead_lock);
+ cmd_res |= FIELD_PREP(SDHCI_UHS2_TIMER_CTRL_DEADLOCK_MASK, dead_lock);
+ sdhci_writeb(host, cmd_res, SDHCI_UHS2_TIMER_CTRL);
+}
+
+void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
+{
+ __sdhci_set_timeout(host, cmd);
+
+ if (sdhci_uhs2_mode(host))
+ __sdhci_uhs2_set_timeout(host);
+}
+EXPORT_SYMBOL_GPL(sdhci_uhs2_set_timeout);
+
/*****************************************************************************\
* *
* MMC callbacks *
diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h
index 03b9f6675cdc..a58ef19c08aa 100644
--- a/drivers/mmc/host/sdhci-uhs2.h
+++ b/drivers/mmc/host/sdhci-uhs2.h
@@ -177,5 +177,6 @@ struct sdhci_host;
void sdhci_uhs2_dump_regs(struct sdhci_host *host);
bool sdhci_uhs2_mode(struct sdhci_host *host);
void sdhci_uhs2_reset(struct sdhci_host *host, u16 mask);
+void sdhci_uhs2_set_timeout(struct sdhci_host *host, struct mmc_command *cmd);
#endif /* __SDHCI_UHS2_H */
--
2.25.1
next prev parent reply other threads:[~2022-12-13 9:03 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-13 9:00 [PATCH V6 00/24] Add support UHS-II for GL9755 Victor Shih
2022-12-13 9:00 ` [PATCH V6 01/24] mmc: core: Cleanup printing of speed mode at card insertion Victor Shih
2023-01-05 21:22 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 02/24] mmc: core: Prepare to support SD UHS-II cards Victor Shih
2022-12-13 9:00 ` [PATCH V6 03/24] mmc: core: Announce successful insertion of an SD UHS-II card Victor Shih
2022-12-13 9:00 ` [PATCH V6 04/24] mmc: core: Extend support for mmc regulators with a vqmmc2 Victor Shih
2022-12-13 9:00 ` [PATCH V6 05/24] mmc: core: Add definitions for SD UHS-II cards Victor Shih
2023-02-06 16:13 ` Ulf Hansson
2023-02-24 10:23 ` Victor Shih
2023-02-27 15:29 ` Ulf Hansson
2023-02-07 10:59 ` Ulf Hansson
2022-12-13 9:00 ` [PATCH V6 06/24] mmc: core: Support UHS-II card control and access Victor Shih
2023-01-05 21:26 ` Adrian Hunter
2023-02-08 15:30 ` Ulf Hansson
2023-02-24 10:23 ` Victor Shih
2023-02-27 15:19 ` Ulf Hansson
2022-12-13 9:00 ` [PATCH V6 07/24] mmc: sdhci: add UHS-II related definitions in headers Victor Shih
2023-01-05 21:22 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 08/24] mmc: sdhci: add UHS-II module and add a kernel configuration Victor Shih
2022-12-13 9:00 ` [PATCH V6 09/24] mmc: sdhci-uhs2: dump UHS-II registers Victor Shih
2023-01-05 21:26 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 10/24] mmc: sdhci-uhs2: add reset function and uhs2_mode function Victor Shih
2022-12-13 9:00 ` [PATCH V6 11/24] mmc: sdhci-uhs2: add set_power() to support vdd2 Victor Shih
2023-01-05 21:27 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 12/24] mmc: sdhci-uhs2: skip signal_voltage_switch() Victor Shih
2022-12-13 9:00 ` Victor Shih [this message]
2022-12-13 9:00 ` [PATCH V6 14/24] mmc: sdhci-uhs2: add set_ios() Victor Shih
2023-01-05 21:27 ` Adrian Hunter
2023-01-26 10:58 ` Victor Shih
2023-01-30 13:16 ` Adrian Hunter
2023-02-24 10:23 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 15/24] mmc: sdhci-uhs2: add detect_init() to detect the interface Victor Shih
2023-01-05 21:28 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 16/24] mmc: sdhci-uhs2: add clock operations Victor Shih
2022-12-13 9:00 ` [PATCH V6 17/24] mmc: sdhci-uhs2: add uhs2_control() to initialise the interface Victor Shih
2023-01-05 21:28 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 18/24] mmc: sdhci-uhs2: add request() and others Victor Shih
2023-01-05 21:29 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 19/24] mmc: sdhci-uhs2: add irq() " Victor Shih
2023-01-05 21:30 ` Adrian Hunter
2023-02-24 10:22 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 20/24] mmc: sdhci-uhs2: add add_host() and others to set up the driver Victor Shih
2023-01-05 21:30 ` Adrian Hunter
2023-02-24 10:23 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 21/24] mmc: sdhci-uhs2: add pre-detect_init hook Victor Shih
2022-12-13 9:00 ` [PATCH V6 22/24] mmc: sdhci-uhs2: add post-mmc_attach_sd hook Victor Shih
2023-01-05 21:31 ` Adrian Hunter
2023-02-24 10:23 ` Victor Shih
2022-12-13 9:00 ` [PATCH V6 23/24] mmc: sdhci-pci: add UHS-II support framework Victor Shih
2022-12-13 9:00 ` [PATCH V6 24/24] mmc: sdhci-pci-gli: enable UHS-II mode for GL9755 Victor Shih
2023-02-08 11:35 ` Ulf Hansson
2023-01-03 11:04 ` [PATCH V6 00/24] Add support UHS-II " Victor Shih
2023-01-03 11:47 ` Ulf Hansson
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