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Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.19.8/0590-mmc-sdhci-Add-sd-host-v4-mode.patch')
-rw-r--r--common/recipes-kernel/linux/linux-yocto-4.19.8/0590-mmc-sdhci-Add-sd-host-v4-mode.patch96
1 files changed, 96 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.19.8/0590-mmc-sdhci-Add-sd-host-v4-mode.patch b/common/recipes-kernel/linux/linux-yocto-4.19.8/0590-mmc-sdhci-Add-sd-host-v4-mode.patch
new file mode 100644
index 00000000..3e25dc05
--- /dev/null
+++ b/common/recipes-kernel/linux/linux-yocto-4.19.8/0590-mmc-sdhci-Add-sd-host-v4-mode.patch
@@ -0,0 +1,96 @@
+From 7ccbef3080857fcbef86c50a23235b7b3eaf9db7 Mon Sep 17 00:00:00 2001
+From: Sudheesh Mavila <sudheesh.mavila@amd.com>
+Date: Thu, 24 Jan 2019 11:46:45 +0530
+Subject: [PATCH 0590/2940] mmc: sdhci: Add sd host v4 mode
+
+Signed-off-by: Sudheesh Mavila <sudheesh.mavila@amd.com>
+---
+ drivers/mmc/host/sdhci.c | 29 +++++++++++++++++++++++++++++
+ drivers/mmc/host/sdhci.h | 3 +++
+ 2 files changed, 32 insertions(+)
+
+diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
+index f22a89b1cfeb..c067cd5461d4 100644
+--- a/drivers/mmc/host/sdhci.c
++++ b/drivers/mmc/host/sdhci.c
+@@ -123,6 +123,29 @@ EXPORT_SYMBOL_GPL(sdhci_dumpregs);
+ * *
+ \*****************************************************************************/
+
++static void sdhci_do_enable_v4_mode(struct sdhci_host *host)
++{
++ u16 ctrl2;
++
++ ctrl2 = sdhci_readb(host, SDHCI_HOST_CONTROL2);
++ if (ctrl2 & SDHCI_CTRL_V4_MODE)
++ return;
++
++ ctrl2 |= SDHCI_CTRL_V4_MODE;
++ sdhci_writeb(host, ctrl2, SDHCI_HOST_CONTROL);
++}
++
++/*
++ * This can be called before sdhci_add_host() by Vendor's host controller
++ * driver to enable v4 mode if supported.
++ */
++void sdhci_enable_v4_mode(struct sdhci_host *host)
++{
++ host->v4_mode = true;
++ sdhci_do_enable_v4_mode(host);
++}
++EXPORT_SYMBOL_GPL(sdhci_enable_v4_mode);
++
+ static inline bool sdhci_data_line_cmd(struct mmc_command *cmd)
+ {
+ return cmd->data || cmd->flags & MMC_RSP_BUSY;
+@@ -252,6 +275,9 @@ static void sdhci_init(struct sdhci_host *host, int soft)
+ else
+ sdhci_do_reset(host, SDHCI_RESET_ALL);
+
++ if (host->v4_mode)
++ sdhci_do_enable_v4_mode(host);
++
+ sdhci_set_default_irqs(host);
+
+ host->cqe_on = false;
+@@ -3394,6 +3420,9 @@ void __sdhci_read_caps(struct sdhci_host *host, u16 *ver, u32 *caps, u32 *caps1)
+
+ sdhci_do_reset(host, SDHCI_RESET_ALL);
+
++ if (host->v4_mode)
++ sdhci_do_enable_v4_mode(host);
++
+ of_property_read_u64(mmc_dev(host->mmc)->of_node,
+ "sdhci-caps-mask", &dt_caps_mask);
+ of_property_read_u64(mmc_dev(host->mmc)->of_node,
+diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
+index db7cb4b388fe..f1b56bbc84fb 100755
+--- a/drivers/mmc/host/sdhci.h
++++ b/drivers/mmc/host/sdhci.h
+@@ -184,6 +184,7 @@
+ #define SDHCI_CTRL_DRV_TYPE_D 0x0030
+ #define SDHCI_CTRL_EXEC_TUNING 0x0040
+ #define SDHCI_CTRL_TUNED_CLK 0x0080
++#define SDHCI_CTRL_V4_MODE 0x1000
+ #define SDHCI_CTRL_PRESET_VAL_ENABLE 0x8000
+
+ #define SDHCI_CAPABILITIES 0x40
+@@ -504,6 +505,7 @@ struct sdhci_host {
+ bool preset_enabled; /* Preset is enabled */
+ bool pending_reset; /* Cmd/data reset is pending */
+ bool irq_wake_enabled; /* IRQ wakeup is enabled */
++ bool v4_mode; /* Host Version 4 Enable */
+
+ struct mmc_request *mrqs_done[SDHCI_MAX_MRQS]; /* Requests done */
+ struct mmc_command *cmd; /* Current command */
+@@ -759,6 +761,7 @@ bool sdhci_cqe_irq(struct sdhci_host *host, u32 intmask, int *cmd_error,
+ int *data_error);
+
+ void sdhci_dumpregs(struct sdhci_host *host);
++void sdhci_enable_v4_mode(struct sdhci_host *host);
+
+ void sdhci_start_tuning(struct sdhci_host *host);
+ void sdhci_end_tuning(struct sdhci_host *host);
+--
+2.17.1
+