From: Matthijs Kooijman <matthijs@xxxxxxxx>
This adds a dwc_platform.ko module that can be loaded by using
compatible = "snps,dwc2" in a device tree.
Signed-off-by: Matthijs Kooijman <matthijs@xxxxxxxx>
Signed-off-by: Paul Zimmerman <paulz@xxxxxxxxxxxx>
---
Documentation/devicetree/bindings/staging/dwc2.txt | 15 +++
drivers/staging/dwc2/Kconfig | 6 +-
drivers/staging/dwc2/Makefile | 2 +
drivers/staging/dwc2/hcd.c | 1 +
drivers/staging/dwc2/platform.c | 145 +++++++++++++++++++++
5 files changed, 167 insertions(+), 2 deletions(-)
create mode 100644 Documentation/devicetree/bindings/staging/dwc2.txt
create mode 100644 drivers/staging/dwc2/platform.c
diff --git a/Documentation/devicetree/bindings/staging/dwc2.txt b/Documentation/devicetree/bindings/staging/dwc2.txt
new file mode 100644
index 0000000..1a1b7cf
--- /dev/null
+++ b/Documentation/devicetree/bindings/staging/dwc2.txt
@@ -0,0 +1,15 @@
+Platform DesignWare HS OTG USB 2.0 controller
+-----------------------------------------------------
+
+Required properties:
+- compatible : "snps,dwc2"
+- reg : Should contain 1 register range (address and length)
+- interrupts : Should contain 1 interrupt
+
+Example:
+
+ usb@101c0000 {
+ compatible = "ralink,rt3050-usb, snps,dwc2";
+ reg = <0x101c0000 40000>;
+ interrupts = <18>;
+ };
diff --git a/drivers/staging/dwc2/Kconfig b/drivers/staging/dwc2/Kconfig
index 2f75be7..f0b4739 100644
--- a/drivers/staging/dwc2/Kconfig
+++ b/drivers/staging/dwc2/Kconfig
@@ -8,9 +8,11 @@ config USB_DWC2
USB controller based on the DesignWare HSOTG IP Core.
If you choose to build this driver as dynamically linked
- modules, the core module will be called dwc2.ko, and the
+ modules, the core module will be called dwc2.ko, the
PCI bus interface module (if you have a PCI bus system)
- will be called dwc2_pci.ko.
+ will be called dwc2_pci.ko and the platform interface module
+ (for controllers directly connected to the CPU) will be called
+ dwc2_platform.ko.
NOTE: This driver at present only implements the Host mode
of the controller. The existing s3c-hsotg driver supports
diff --git a/drivers/staging/dwc2/Makefile b/drivers/staging/dwc2/Makefile
index 6dccf46..11529d3 100644
--- a/drivers/staging/dwc2/Makefile
+++ b/drivers/staging/dwc2/Makefile
@@ -19,5 +19,7 @@ dwc2-y += hcd_queue.o hcd_ddma.o
ifneq ($(CONFIG_PCI),)
obj-$(CONFIG_USB_DWC2) += dwc2_pci.o
endif
+obj-$(CONFIG_USB_DWC2) += dwc2_platform.o
dwc2_pci-y += pci.o
+dwc2_platform-y += platform.o
diff --git a/drivers/staging/dwc2/hcd.c b/drivers/staging/dwc2/hcd.c
index 65b7348..827ab78 100644
--- a/drivers/staging/dwc2/hcd.c
+++ b/drivers/staging/dwc2/hcd.c
@@ -2693,6 +2693,7 @@ void dwc2_set_all_params(struct dwc2_core_params *params, int value)
for (i = 0; i < size; i++)
p[i] = -1;
}
+EXPORT_SYMBOL_GPL(dwc2_set_all_params);
/*
* Initializes the HCD. This function allocates memory for and initializes the
diff --git a/drivers/staging/dwc2/platform.c b/drivers/staging/dwc2/platform.c
new file mode 100644
index 0000000..1f3d581
--- /dev/null
+++ b/drivers/staging/dwc2/platform.c
@@ -0,0 +1,145 @@
+/*
+ * platform.c - DesignWare HS OTG Controller platform driver
+ *
+ * Copyright (C) Matthijs Kooijman <matthijs@xxxxxxxx>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation; either version 2 of the License, or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+
+#include "core.h"
+#include "hcd.h"
+
+static const char dwc2_driver_name[] = "dwc2";
+
+/**
+ * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
+ * DWC_otg driver
+ *
+ * @dev: Platform device
+ *
+ * This routine is called, for example, when the rmmod command is executed. The
+ * device may or may not be electrically present. If it is present, the driver
+ * stops device processing. Any resources used on behalf of this device are
+ * freed.
+ */
+static int dwc2_driver_remove(struct platform_device *dev)
+{
+ struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
+
+ dwc2_hcd_remove(hsotg);
+
+ return 0;
+}
+
+/**
+ * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
+ * driver
+ *
+ * @dev: Platform device
+ *
+ * This routine creates the driver components required to control the device
+ * (core, HCD, and PCD) and initializes the device. The driver components are
+ * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
+ * in the device private data. This allows the driver to access the dwc2_hsotg
+ * structure on subsequent calls to driver methods for this device.
+ */
+static int dwc2_driver_probe(struct platform_device *dev)
+{
+ struct dwc2_hsotg *hsotg;
+ struct resource *res;
+ int retval;
+ int irq;
+ struct dwc2_core_params params;
+
+ /* Default all params to autodetect */
+ dwc2_set_all_params(¶ms, -1);
+
+ hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
+ if (!hsotg)
+ return -ENOMEM;
+
+ hsotg->dev = &dev->dev;
+
+ irq = platform_get_irq(dev, 0);
+ if (irq < 0) {
+ dev_err(&dev->dev, "missing IRQ resource\n");
+ return -EINVAL;
+ }
+
+ res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&dev->dev, "missing memory base resource\n");
+ return -EINVAL;
+ }
+
+ hsotg->regs = devm_ioremap_resource(&dev->dev, res);
+ if (IS_ERR(hsotg->regs))
+ return PTR_ERR(hsotg->regs);
+
+ dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
+ (unsigned long)res->start, hsotg->regs);
+
+ retval = dwc2_hcd_init(hsotg, irq, ¶ms);
+ if (retval)
+ return retval;
+
+ platform_set_drvdata(dev, hsotg);
+
+ return retval;
+}
+
+static const struct of_device_id dwc2_of_match_table[] = {
+ { .compatible = "snps,dwc2" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
+
+static struct platform_driver dwc2_platform_driver = {
+ .driver = {
+ .name = (char *)dwc2_driver_name,
+ .of_match_table = dwc2_of_match_table,
+ },
+ .probe = dwc2_driver_probe,
+ .remove = dwc2_driver_remove,
+};
+
+module_platform_driver(dwc2_platform_driver);
+
+MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue");
+MODULE_AUTHOR("Matthijs Kooijman <matthijs@xxxxxxxx>");
+MODULE_LICENSE("Dual BSD/GPL");
--
1.8.2.rc0.16.g20a599e
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