usb: chipidea: add support for USB OTG controller on LSI Zevio SoCs

The USB controller in TI-NSPIRE calculators (LSI Zevio SoC) are based off either
Freescale's USB OTG controller or the USB controller found in the IMX233, both
of which are Chipidea compatible.

This patch adds a device tree binding for the controller.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Daniel Tang <dt.tangr@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 73 insertions, 0 deletions

diff --git a/drivers/usb/chipidea/Makefile b/drivers/usb/chipidea/Makefile
index 7345d2115af2..480bd4d5710a 100644
--- a/drivers/usb/chipidea/Makefile
+++ b/drivers/usb/chipidea/Makefile
@@ -10,6 +10,7 @@ ci_hdrc-$(CONFIG_USB_CHIPIDEA_DEBUG)	+= debug.o
 # Glue/Bridge layers go here
 
 obj-$(CONFIG_USB_CHIPIDEA)      += ci_hdrc_msm.o
+obj-$(CONFIG_USB_CHIPIDEA)      += ci_hdrc_zevio.o
 
 # PCI doesn't provide stubs, need to check
 ifneq ($(CONFIG_PCI),)
diff --git a/drivers/usb/chipidea/ci_hdrc_zevio.c b/drivers/usb/chipidea/ci_hdrc_zevio.c
new file mode 100644
index 000000000000..3bf6489ef5ec
--- /dev/null
+++ b/drivers/usb/chipidea/ci_hdrc_zevio.c
@@ -0,0 +1,72 @@
+/*
+ *      Copyright (C) 2013 Daniel Tang <tangrs@tangrs.id.au>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ * Based off drivers/usb/chipidea/ci_hdrc_msm.c
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/chipidea.h>
+
+#include "ci.h"
+
+static struct ci_hdrc_platform_data ci_hdrc_zevio_platdata = {
+        .name                   = "ci_hdrc_zevio",
+        .flags                  = CI_HDRC_REGS_SHARED,
+        .capoffset              = DEF_CAPOFFSET,
+};
+
+static int ci_hdrc_zevio_probe(struct platform_device *pdev)
+{
+        struct platform_device *ci_pdev;
+
+        dev_dbg(&pdev->dev, "ci_hdrc_zevio_probe\n");
+
+        ci_pdev = ci_hdrc_add_device(&pdev->dev,
+                                pdev->resource, pdev->num_resources,
+                                &ci_hdrc_zevio_platdata);
+
+        if (IS_ERR(ci_pdev)) {
+                dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
+                return PTR_ERR(ci_pdev);
+        }
+
+        platform_set_drvdata(pdev, ci_pdev);
+
+        return 0;
+}
+
+static int ci_hdrc_zevio_remove(struct platform_device *pdev)
+{
+        struct platform_device *ci_pdev = platform_get_drvdata(pdev);
+
+        ci_hdrc_remove_device(ci_pdev);
+
+        return 0;
+}
+
+static const struct of_device_id ci_hdrc_zevio_dt_ids[] = {
+        { .compatible = "lsi,zevio-usb", },
+        { /* sentinel */ }
+};
+
+static struct platform_driver ci_hdrc_zevio_driver = {
+        .probe = ci_hdrc_zevio_probe,
+        .remove = ci_hdrc_zevio_remove,
+        .driver = {
+                .name = "zevio_usb",
+                .owner = THIS_MODULE,
+                .of_match_table = ci_hdrc_zevio_dt_ids,
+        },
+};
+
+MODULE_DEVICE_TABLE(of, ci_hdrc_zevio_dt_ids);
+module_platform_driver(ci_hdrc_zevio_driver);
+
+MODULE_LICENSE("GPL v2");