LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Liming Sun <lsun@mellanox.com>
To: Ulf Hansson <ulf.hansson@linaro.org>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Jaehoon Chung <jh80.chung@samsung.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>
Cc: Liming Sun <lsun@mellanox.com>,
	linux-mmc@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/3] mmc: dw_mmc-bluefield: Add driver extension
Date: Mon, 23 Apr 2018 11:32:20 -0400	[thread overview]
Message-ID: <026fa942828c54fda5bad225981e56abc808b949.1524497286.git.lsun@mellanox.com> (raw)

This commit adds extension to the dw_mmc driver for Mellanox BlueField
SoC. It updates the UHS_REG_EXT register to bring up the eMMC card on
this SoC.

Signed-off-by: Liming Sun <lsun@mellanox.com>
---
 drivers/mmc/host/Kconfig            |  9 +++++
 drivers/mmc/host/Makefile           |  1 +
 drivers/mmc/host/dw_mmc-bluefield.c | 72 +++++++++++++++++++++++++++++++++++++
 3 files changed, 82 insertions(+)
 create mode 100644 drivers/mmc/host/dw_mmc-bluefield.c

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 9589f9c..26ac6b5 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -717,6 +717,15 @@ config MMC_DW_K3
 	  Synopsys DesignWare Memory Card Interface driver. Select this option
 	  for platforms based on Hisilicon K3 SoC's.
 
+config MMC_DW_BLUEFIELD
+	tristate "BlueField specific extensions for Synopsys DW Memory Card Interface"
+	depends on MMC_DW
+	select MMC_DW_PLTFM
+	help
+	  This selects support for Mellanox BlueField SoC specific extensions to
+	  the Synopsys DesignWare Memory Card Interface driver. Select this
+	  option for platforms based on Mellanox BlueField SoC's.
+
 config MMC_DW_PCI
 	tristate "Synopsys Designware MCI support on PCI bus"
 	depends on MMC_DW && PCI
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 6aead24..267b3f1 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -55,6 +55,7 @@ obj-$(CONFIG_MMC_DW_K3)		+= dw_mmc-k3.o
 obj-$(CONFIG_MMC_DW_PCI)	+= dw_mmc-pci.o
 obj-$(CONFIG_MMC_DW_ROCKCHIP)	+= dw_mmc-rockchip.o
 obj-$(CONFIG_MMC_DW_ZX)		+= dw_mmc-zx.o
+obj-$(CONFIG_MMC_DW_BLUEFIELD)	+= dw_mmc-bluefield.o
 obj-$(CONFIG_MMC_SH_MMCIF)	+= sh_mmcif.o
 obj-$(CONFIG_MMC_JZ4740)	+= jz4740_mmc.o
 obj-$(CONFIG_MMC_VUB300)	+= vub300.o
diff --git a/drivers/mmc/host/dw_mmc-bluefield.c b/drivers/mmc/host/dw_mmc-bluefield.c
new file mode 100644
index 0000000..12067b1
--- /dev/null
+++ b/drivers/mmc/host/dw_mmc-bluefield.c
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 Mellanox Technologies.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include <linux/of.h>
+
+#include "dw_mmc.h"
+#include "dw_mmc-pltfm.h"
+
+static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct mmc_ios *ios)
+{
+	u32 regs;
+
+	/* Set drive=4 (bit 29:23) and sample=2 (bit 22:16) in UHS_REG_EXT. */
+	regs = mci_readl(host, UHS_REG_EXT);
+	regs = (regs & ~0x3F100000 & ~0x7F0000) | (4 << 23) | (2 << 16);
+	mci_writel(host, UHS_REG_EXT, regs);
+}
+
+static const struct dw_mci_drv_data bluefield_drv_data = {
+	.set_ios		= dw_mci_bluefield_set_ios
+};
+
+static const struct of_device_id dw_mci_bluefield_match[] = {
+	{ .compatible = "mellanox,bluefield-dw-mshc",
+		.data = &bluefield_drv_data },
+	{},
+};
+MODULE_DEVICE_TABLE(of, dw_mci_bluefield_match);
+
+static int dw_mci_bluefield_probe(struct platform_device *pdev)
+{
+	const struct dw_mci_drv_data *drv_data = NULL;
+	const struct of_device_id *match;
+
+	if (pdev->dev.of_node) {
+		match = of_match_node(dw_mci_bluefield_match,
+				      pdev->dev.of_node);
+		drv_data = match->data;
+	}
+
+	return dw_mci_pltfm_register(pdev, drv_data);
+}
+
+static struct platform_driver dw_mci_bluefield_pltfm_driver = {
+	.probe		= dw_mci_bluefield_probe,
+	.remove		= dw_mci_pltfm_remove,
+	.driver		= {
+		.name		= "dwmmc_bluefield",
+		.of_match_table	= dw_mci_bluefield_match,
+		.pm		= &dw_mci_pltfm_pmops,
+	},
+};
+
+module_platform_driver(dw_mci_bluefield_pltfm_driver);
+
+MODULE_DESCRIPTION("BlueField DW Multimedia Card driver");
+MODULE_AUTHOR("Mellanox Technologies");
+MODULE_LICENSE("GPL v2");
-- 
1.8.3.1

             reply	other threads:[~2018-04-23 15:34 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-23 15:32 Liming Sun [this message]
2018-04-23 15:32 ` [PATCH v2 2/3] Documentation: bluefield-dw-mshc: add DT description Liming Sun
2018-04-27 19:50   ` Rob Herring
2018-04-30 14:57     ` Liming Sun
2018-04-23 15:32 ` [PATCH v2 3/3] arm64: defconfig: Enable dw_mmc-bluefield driver Liming Sun
2018-04-24  1:11 ` [PATCH v2 1/3] mmc: dw_mmc-bluefield: Add driver extension Shawn Lin
2018-05-08 13:06   ` Liming Sun
2018-05-08 18:55   ` Liming Sun
2018-04-30 14:51 ` [PATCH v3 " Liming Sun
2018-04-30 14:51 ` [PATCH v3 2/3] dt-bindings: mmc: Add binding for BlueField SoC Liming Sun
2018-05-01 12:48   ` Rob Herring
2018-05-01 14:36     ` Liming Sun
2018-04-30 14:51 ` [PATCH v3 3/3] arm64: defconfig: Enable dw_mmc-bluefield driver Liming Sun
2018-05-01 14:32 ` [PATCH v4 1/3] mmc: dw_mmc-bluefield: Add driver extension Liming Sun
2018-05-01 14:32 ` [PATCH v4 2/3] dt-bindings: mmc: Add binding for BlueField SoC Liming Sun
2018-05-01 16:24   ` Rob Herring
2018-05-01 19:10     ` Liming Sun
2018-05-01 14:32 ` [PATCH v4 3/3] arm64: defconfig: Enable dw_mmc-bluefield driver Liming Sun
2018-05-01 18:19 ` [PATCH v5 1/3] mmc: dw_mmc-bluefield: Add driver extension Liming Sun
2018-05-02  1:02   ` Shawn Lin
2018-05-02 12:45     ` Liming Sun
2018-05-03  7:25       ` Shawn Lin
2018-05-03 14:35         ` Liming Sun
2018-05-02  8:16   ` Jaehoon Chung
2018-05-03 15:52     ` Liming Sun
2018-05-01 18:19 ` [PATCH v5 2/3] dt-bindings: mmc: Add binding for BlueField SoC Liming Sun
2018-05-01 18:19 ` [PATCH v5 3/3] arm64: defconfig: Enable dw_mmc-bluefield driver Liming Sun
2018-05-03 15:45 ` [PATCH v6 1/3] mmc: dw_mmc-bluefield: Add driver extension Liming Sun
2018-05-03 15:45 ` [PATCH v6 2/3] dt-bindings: mmc: Add binding for BlueField SoC Liming Sun
2018-05-03 15:45 ` [PATCH v6 3/3] arm64: defconfig: Enable dw_mmc-bluefield driver Liming Sun
2018-05-08 18:46 ` [PATCH v7 1/3] mmc: dw_mmc-bluefield: Add driver extension Liming Sun
2018-05-09  1:45   ` Shawn Lin
2018-05-21 11:36   ` Ulf Hansson
2019-01-18 10:06   ` Thomas Gleixner
2018-05-08 18:46 ` [PATCH v7 2/3] dt-bindings: mmc: Add binding for BlueField SoC Liming Sun
2018-05-21 11:36   ` Ulf Hansson
2018-05-08 18:46 ` [PATCH v7 3/3] arm64: defconfig: Enable dw_mmc-bluefield driver Liming Sun
2018-05-21 11:36   ` Ulf Hansson
2018-05-21 19:35     ` Liming Sun

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=026fa942828c54fda5bad225981e56abc808b949.1524497286.git.lsun@mellanox.com \
    --to=lsun@mellanox.com \
    --cc=catalin.marinas@arm.com \
    --cc=devicetree@vger.kernel.org \
    --cc=jh80.chung@samsung.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mmc@vger.kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=robh+dt@kernel.org \
    --cc=ulf.hansson@linaro.org \
    --cc=will.deacon@arm.com \
    --subject='Re: [PATCH v2 1/3] mmc: dw_mmc-bluefield: Add driver extension' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).