[PATCH 6/8] CI13xxx: Add i.MX233/i.MX28 binding code

[Marek Vasut]

This codes connects the CI13xxx driver with the core found inside of
the Freescale i.MX244/i.MX28 CPU.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Alan Stern <stern at rowland.harvard.edu>
Cc: Detlev Zundel <dzu at denx.de>
CC: Dong Aisheng <b29396 at freescale.com>
CC: Fabio Estevam <fabio.estevam at freescale.com>
Cc: Felipe Balbi <balbi at ti.com>
Cc: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Cc: Linux ARM kernel <linux-arm-kernel at lists.infradead.org>
Cc: linux-i2c at vger.kernel.org
CC: Sascha Hauer <s.hauer at pengutronix.de>
CC: Shawn Guo <shawn.guo at linaro.org>
Cc: Stefano Babic <sbabic at denx.de>
CC: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
Cc: Wolfgang Denk <wd at denx.de>
Cc: Wolfram Sang <w.sang at pengutronix.de>
---
 drivers/usb/chipidea/Makefile      |    4 +
 drivers/usb/chipidea/ci13xxx_mxs.c |  201 ++++++++++++++++++++++++++++++++++++
 2 files changed, 205 insertions(+)
 create mode 100644 drivers/usb/chipidea/ci13xxx_mxs.c

diff --git a/drivers/usb/chipidea/Makefile b/drivers/usb/chipidea/Makefile
index cc34937..266d57d 100644
--- a/drivers/usb/chipidea/Makefile
+++ b/drivers/usb/chipidea/Makefile
@@ -12,3 +12,7 @@ endif
 ifneq ($(CONFIG_ARCH_MSM),)
 	obj-$(CONFIG_USB_CHIPIDEA)	+= ci13xxx_msm.o
 endif
+
+ifneq ($(CONFIG_ARCH_MXS),)
+	obj-$(CONFIG_USB_CHIPIDEA)	+= ci13xxx_mxs.o
+endif
diff --git a/drivers/usb/chipidea/ci13xxx_mxs.c b/drivers/usb/chipidea/ci13xxx_mxs.c
new file mode 100644
index 0000000..fcca90b
--- /dev/null
+++ b/drivers/usb/chipidea/ci13xxx_mxs.c
@@ -0,0 +1,201 @@
+/*
+ * drivers/usb/chipidea/ci13xxx_mxs.c
+ *
+ * Freescale i.MX233/i.MX28 USB glue driver to CI13xxx core.
+ *
+ * Copyright (C) 2012 Marek Vasut <marex at denx.de>
+ * on behalf of DENX Software Engineering GmbH
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+
+#include <linux/usb.h>
+#include <linux/usb/chipidea.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/hcd.h>
+#include <linux/usb/ehci_def.h>
+
+#include <linux/usb/mxs-usb.h>
+
+#include "ci.h"
+
+static void ci13xxx_mxs_notify(struct ci13xxx *ci, unsigned event)
+{
+	uint32_t status;
+	struct usb_phy *phy;
+	struct mxs_ci13xxx_phy_notify notify;
+
+	phy = usb_get_transceiver();
+	if (!phy)
+		return;
+
+	if (event != CI13XXX_CONTROLLER_HOST_IRQ_EVENT)
+		return;
+
+	status = hw_read(ci, OP_USBSTS, ~0);
+
+	notify.discon = status & STS_PCD;
+
+	usb_phy_notify(phy, &notify);
+}
+
+static struct ci13xxx_udc_driver ci13xxx_mxs_udc_driver = {
+	.name			= "ci13xxx_mxs",
+	.flags			= /*CI13XXX_REGS_SHARED |*/
+				  CI13XXX_REQUIRE_TRANSCEIVER |
+				  CI13XXX_PULLUP_ON_VBUS |
+				  CI13XXX_DISABLE_STREAMING,
+	.capoffset		= 0x100,
+	.notify_event		= ci13xxx_mxs_notify,
+};
+
+struct ci13xxx_mxs_data {
+	struct clk		*clk;
+	struct platform_device	*pdev;
+};
+
+static int __devinit ci13xxx_mxs_probe(struct platform_device *pdev)
+{
+	struct ci13xxx_mxs_data *data;
+	int ret;
+	struct usb_phy *phy;
+
+	phy = usb_get_transceiver();
+	if (!phy)
+		return -EPROBE_DEFER;
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data) {
+		dev_err(&pdev->dev, "Failed to allocate CI13xxx-MXS data!\n");
+		return -ENOMEM;
+	}
+
+	ret = usb_phy_init(phy);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to initialize PHY!\n");
+		return -EINVAL;
+	}
+
+	data->pdev = platform_device_alloc("ci_hdrc", -1);
+	if (!data->pdev) {
+		dev_err(&pdev->dev,
+			"Failed to allocate ci_hdrc platform device!\n");
+		ret = -ENOMEM;
+		goto put_phy;
+	}
+
+	/* Add DMA mask */
+	data->pdev->dev.dma_mask = devm_kzalloc(&pdev->dev,
+					sizeof(*data->pdev->dev.dma_mask),
+					GFP_KERNEL);
+	if (!data->pdev->dev.dma_mask) {
+		ret = -ENOMEM;
+		goto put_platform;
+	}
+
+	*data->pdev->dev.dma_mask = DMA_BIT_MASK(32);
+	data->pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+
+	ret = platform_device_add_resources(data->pdev, pdev->resource,
+					    pdev->num_resources);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"Failed to add resources to platform device!\n");
+		goto put_platform;
+	}
+
+	ret = platform_device_add_data(data->pdev, &ci13xxx_mxs_udc_driver,
+				       sizeof(ci13xxx_mxs_udc_driver));
+	if (ret) {
+		dev_err(&pdev->dev,
+			"Failed to add platform data to platform device!\n");
+		goto put_platform;
+	}
+
+	/* Claim the Host clock. */
+	data->clk = clk_get(&pdev->dev, "usb");
+	if (IS_ERR(data->clk)) {
+		dev_err(&pdev->dev, "Failed to claim clock for USB Host\n");
+		ret = PTR_ERR(data->clk);
+		goto put_platform;
+	}
+
+	/* Prepare Host clock. */
+	ret = clk_prepare_enable(data->clk);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to enable clock for USB Host.\n");
+		goto put_clk;
+	}
+
+	ret = platform_device_add(data->pdev);
+	if (ret)
+		goto put_clk;
+
+	dev_set_drvdata(&pdev->dev, data);
+
+	pm_runtime_no_callbacks(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
+
+	return 0;
+
+put_clk:
+	clk_put(data->clk);
+put_platform:
+	platform_device_put(data->pdev);
+put_phy:
+	usb_phy_shutdown(phy);
+	return ret;
+}
+
+static int __devexit ci13xxx_mxs_remove(struct platform_device *pdev)
+{
+	struct ci13xxx_mxs_data *data = dev_get_drvdata(&pdev->dev);
+	struct usb_phy *phy = usb_get_transceiver();
+
+	clk_disable_unprepare(data->clk);
+	clk_put(data->clk);
+
+	if (phy)
+		usb_phy_shutdown(phy);
+
+	platform_device_del(data->pdev);
+	platform_device_put(data->pdev);
+
+	return 0;
+}
+
+static struct platform_driver ci13xxx_mxs_driver = {
+	.probe		= ci13xxx_mxs_probe,
+	.remove		= __devexit_p(ci13xxx_mxs_remove),
+	.driver		= {
+		.name	= "mxs-usb",
+		.owner	= THIS_MODULE,
+	},
+};
+
+module_platform_driver(ci13xxx_mxs_driver);
+
+MODULE_ALIAS("platform:mxs-usb");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("CI13xxx MXS USB binding");
+MODULE_AUTHOR("Marek Vasut <marex at denx.de>");
-- 
1.7.10