3c1f6e358d
Patches are generated using the "format-patch" command from the following location: *https://www.codeaurora.org/cgit/quic/kernel/galak-msm/log/?h=apq_ipq_base *rev=0771849495b4128cac2faf7d49c85c729fc48b20 Patches numbered 76/77/102/103 have already been integrated in 3.14.12, so they're not in this list. All these patches are either integrated are pending integration into kernel.org, therefore these patches should go away once the kernel gets upgraded to 3.16. Support is currently limited to AP148 board but can be extended to other platforms in the future. These changes do not cover ethernet connectivity. Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org> SVN-Revision: 42334
212 lines
5.7 KiB
Diff
212 lines
5.7 KiB
Diff
From 364532aeb9024d0ff7b88121f9a953f559b1c136 Mon Sep 17 00:00:00 2001
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From: "Ivan T. Ivanov" <iivanov@mm-sol.com>
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Date: Mon, 7 Oct 2013 10:44:57 +0300
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Subject: [PATCH 156/182] usb: dwc3: Add Qualcomm DWC3 glue layer driver
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DWC3 glue layer is hardware layer around Synopsys DesignWare
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USB3 core. Its purpose is to supply Synopsys IP with required
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clocks, voltages and interface it with the rest of the SoC.
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Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
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---
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drivers/usb/dwc3/Kconfig | 8 +++
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drivers/usb/dwc3/Makefile | 1 +
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drivers/usb/dwc3/dwc3-qcom.c | 156 ++++++++++++++++++++++++++++++++++++++++++
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3 files changed, 165 insertions(+)
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create mode 100644 drivers/usb/dwc3/dwc3-qcom.c
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diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
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index e2c730f..2d01983 100644
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--- a/drivers/usb/dwc3/Kconfig
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+++ b/drivers/usb/dwc3/Kconfig
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@@ -59,6 +59,14 @@ config USB_DWC3_EXYNOS
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Recent Exynos5 SoCs ship with one DesignWare Core USB3 IP inside,
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say 'Y' or 'M' if you have one such device.
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+config USB_DWC3_QCOM
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+ tristate "Qualcomm Platforms"
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+ default USB_DWC3
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+ select USB_QCOM_DWC3_PHYS
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+ help
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+ Recent Qualcomm SoCs ship with one DesignWare Core USB3 IP inside,
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+ say 'Y' or 'M' if you have one such device.
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+
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config USB_DWC3_PCI
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tristate "PCIe-based Platforms"
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depends on PCI
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diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile
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index 10ac3e7..4066e4e 100644
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--- a/drivers/usb/dwc3/Makefile
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+++ b/drivers/usb/dwc3/Makefile
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@@ -31,5 +31,6 @@ endif
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obj-$(CONFIG_USB_DWC3_OMAP) += dwc3-omap.o
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obj-$(CONFIG_USB_DWC3_EXYNOS) += dwc3-exynos.o
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+obj-$(CONFIG_USB_DWC3_QCOM) += dwc3-qcom.o
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obj-$(CONFIG_USB_DWC3_PCI) += dwc3-pci.o
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obj-$(CONFIG_USB_DWC3_KEYSTONE) += dwc3-keystone.o
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diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
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new file mode 100644
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index 0000000..8d17360
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--- /dev/null
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+++ b/drivers/usb/dwc3/dwc3-qcom.c
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@@ -0,0 +1,156 @@
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+/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 and
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+ * only version 2 as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ */
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+
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+#include <linux/clk.h>
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+#include <linux/err.h>
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+#include <linux/io.h>
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+#include <linux/module.h>
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+#include <linux/of.h>
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+#include <linux/of_platform.h>
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+#include <linux/platform_device.h>
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+#include <linux/regulator/consumer.h>
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+#include <linux/usb/phy.h>
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+
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+#include "core.h"
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+
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+
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+struct dwc3_qcom {
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+ struct device *dev;
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+
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+ struct clk *core_clk;
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+ struct clk *iface_clk;
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+ struct clk *sleep_clk;
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+
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+ struct regulator *gdsc;
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+};
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+
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+static int dwc3_qcom_probe(struct platform_device *pdev)
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+{
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+ struct device_node *node = pdev->dev.of_node;
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+ struct dwc3_qcom *mdwc;
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+ int ret = 0;
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+
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+ mdwc = devm_kzalloc(&pdev->dev, sizeof(*mdwc), GFP_KERNEL);
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+ if (!mdwc)
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+ return -ENOMEM;
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+
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+ platform_set_drvdata(pdev, mdwc);
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+
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+ mdwc->dev = &pdev->dev;
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+
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+ mdwc->gdsc = devm_regulator_get(mdwc->dev, "gdsc");
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+
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+ mdwc->core_clk = devm_clk_get(mdwc->dev, "core");
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+ if (IS_ERR(mdwc->core_clk)) {
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+ dev_dbg(mdwc->dev, "failed to get core clock\n");
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+ return PTR_ERR(mdwc->core_clk);
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+ }
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+
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+ mdwc->iface_clk = devm_clk_get(mdwc->dev, "iface");
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+ if (IS_ERR(mdwc->iface_clk)) {
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+ dev_dbg(mdwc->dev, "failed to get iface clock, skipping\n");
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+ mdwc->iface_clk = NULL;
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+ }
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+
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+ mdwc->sleep_clk = devm_clk_get(mdwc->dev, "sleep");
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+ if (IS_ERR(mdwc->sleep_clk)) {
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+ dev_dbg(mdwc->dev, "failed to get sleep clock, skipping\n");
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+ mdwc->sleep_clk = NULL;
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+ }
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+
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+ if (!IS_ERR(mdwc->gdsc)) {
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+ ret = regulator_enable(mdwc->gdsc);
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+ if (ret)
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+ dev_err(mdwc->dev, "cannot enable gdsc\n");
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+ }
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+
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+ clk_prepare_enable(mdwc->core_clk);
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+
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+ if (mdwc->iface_clk)
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+ clk_prepare_enable(mdwc->iface_clk);
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+
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+ if (mdwc->sleep_clk)
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+ clk_prepare_enable(mdwc->sleep_clk);
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+
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+ ret = of_platform_populate(node, NULL, NULL, mdwc->dev);
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+ if (ret) {
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+ dev_err(mdwc->dev, "failed to register core - %d\n", ret);
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+ dev_dbg(mdwc->dev, "failed to add create dwc3 core\n");
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+ goto dis_clks;
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+ }
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+
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+ return 0;
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+
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+dis_clks:
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+
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+ dev_err(mdwc->dev, "disabling clocks\n");
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+
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+ if (mdwc->sleep_clk)
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+ clk_disable_unprepare(mdwc->sleep_clk);
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+
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+ if (mdwc->iface_clk)
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+ clk_disable_unprepare(mdwc->iface_clk);
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+
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+ clk_disable_unprepare(mdwc->core_clk);
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+
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+ if (!IS_ERR(mdwc->gdsc)) {
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+ ret = regulator_disable(mdwc->gdsc);
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+ if (ret)
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+ dev_dbg(mdwc->dev, "cannot disable gdsc\n");
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+ }
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+
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+ return ret;
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+}
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+
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+static int dwc3_qcom_remove(struct platform_device *pdev)
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+{
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+ int ret = 0;
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+
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+ struct dwc3_qcom *mdwc = platform_get_drvdata(pdev);
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+
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+ if (mdwc->sleep_clk)
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+ clk_disable_unprepare(mdwc->sleep_clk);
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+
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+ if (mdwc->iface_clk)
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+ clk_disable_unprepare(mdwc->iface_clk);
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+
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+ clk_disable_unprepare(mdwc->core_clk);
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+
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+ if (!IS_ERR(mdwc->gdsc)) {
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+ ret = regulator_disable(mdwc->gdsc);
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+ if (ret)
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+ dev_dbg(mdwc->dev, "cannot disable gdsc\n");
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+ }
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+ return ret;
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+}
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+
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+static const struct of_device_id of_dwc3_match[] = {
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+ { .compatible = "qcom,dwc3" },
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+ { /* Sentinel */ }
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+};
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+MODULE_DEVICE_TABLE(of, of_dwc3_match);
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+
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+static struct platform_driver dwc3_qcom_driver = {
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+ .probe = dwc3_qcom_probe,
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+ .remove = dwc3_qcom_remove,
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+ .driver = {
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+ .name = "qcom-dwc3",
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+ .owner = THIS_MODULE,
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+ .of_match_table = of_dwc3_match,
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+ },
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+};
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+
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+module_platform_driver(dwc3_qcom_driver);
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+
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+MODULE_ALIAS("platform:qcom-dwc3");
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+MODULE_LICENSE("GPL v2");
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+MODULE_DESCRIPTION("DesignWare USB3 QCOM Glue Layer");
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--
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1.7.10.4
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