Initial import

1 files changed, 339 insertions, 0 deletions

diff --git a/drivers/usb/host/fsl-mph-dr-of.c b/drivers/usb/host/fsl-mph-dr-of.c
new file mode 100644
index 000000000..7e325e90d
--- /dev/null
+++ b/drivers/usb/host/fsl-mph-dr-of.c
@@ -0,0 +1,339 @@
+/*
+ * Setup platform devices needed by the Freescale multi-port host
+ * and/or dual-role USB controller modules based on the description
+ * in flat device tree.
+ *
+ * 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/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/fsl_devices.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/of_platform.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+
+struct fsl_usb2_dev_data {
+	char *dr_mode;		/* controller mode */
+	char *drivers[3];	/* drivers to instantiate for this mode */
+	enum fsl_usb2_operating_modes op_mode;	/* operating mode */
+};
+
+static struct fsl_usb2_dev_data dr_mode_data[] = {
+	{
+		.dr_mode = "host",
+		.drivers = { "fsl-ehci", NULL, NULL, },
+		.op_mode = FSL_USB2_DR_HOST,
+	},
+	{
+		.dr_mode = "otg",
+		.drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", },
+		.op_mode = FSL_USB2_DR_OTG,
+	},
+	{
+		.dr_mode = "peripheral",
+		.drivers = { "fsl-usb2-udc", NULL, NULL, },
+		.op_mode = FSL_USB2_DR_DEVICE,
+	},
+};
+
+static struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np)
+{
+	const unsigned char *prop;
+	int i;
+
+	prop = of_get_property(np, "dr_mode", NULL);
+	if (prop) {
+		for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) {
+			if (!strcmp(prop, dr_mode_data[i].dr_mode))
+				return &dr_mode_data[i];
+		}
+	}
+	pr_warn("%s: Invalid 'dr_mode' property, fallback to host mode\n",
+		np->full_name);
+	return &dr_mode_data[0]; /* mode not specified, use host */
+}
+
+static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
+{
+	if (!phy_type)
+		return FSL_USB2_PHY_NONE;
+	if (!strcasecmp(phy_type, "ulpi"))
+		return FSL_USB2_PHY_ULPI;
+	if (!strcasecmp(phy_type, "utmi"))
+		return FSL_USB2_PHY_UTMI;
+	if (!strcasecmp(phy_type, "utmi_wide"))
+		return FSL_USB2_PHY_UTMI_WIDE;
+	if (!strcasecmp(phy_type, "serial"))
+		return FSL_USB2_PHY_SERIAL;
+
+	return FSL_USB2_PHY_NONE;
+}
+
+static struct platform_device *fsl_usb2_device_register(
+					struct platform_device *ofdev,
+					struct fsl_usb2_platform_data *pdata,
+					const char *name, int id)
+{
+	struct platform_device *pdev;
+	const struct resource *res = ofdev->resource;
+	unsigned int num = ofdev->num_resources;
+	int retval;
+
+	pdev = platform_device_alloc(name, id);
+	if (!pdev) {
+		retval = -ENOMEM;
+		goto error;
+	}
+
+	pdev->dev.parent = &ofdev->dev;
+
+	pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask;
+	*pdev->dev.dma_mask = *ofdev->dev.dma_mask;
+
+	retval = platform_device_add_data(pdev, pdata, sizeof(*pdata));
+	if (retval)
+		goto error;
+
+	if (num) {
+		retval = platform_device_add_resources(pdev, res, num);
+		if (retval)
+			goto error;
+	}
+
+	retval = platform_device_add(pdev);
+	if (retval)
+		goto error;
+
+	return pdev;
+
+error:
+	platform_device_put(pdev);
+	return ERR_PTR(retval);
+}
+
+static const struct of_device_id fsl_usb2_mph_dr_of_match[];
+
+static int usb_get_ver_info(struct device_node *np)
+{
+	int ver = -1;
+
+	/*
+	 * returns 1 for usb controller version 1.6
+	 * returns 2 for usb controller version 2.2
+	 * returns 0 otherwise
+	 */
+	if (of_device_is_compatible(np, "fsl-usb2-dr")) {
+		if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6"))
+			ver = FSL_USB_VER_1_6;
+		else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2"))
+			ver = FSL_USB_VER_2_2;
+		else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.4"))
+			ver = FSL_USB_VER_2_4;
+		else /* for previous controller versions */
+			ver = FSL_USB_VER_OLD;
+
+		if (ver > -1)
+			return ver;
+	}
+
+	if (of_device_is_compatible(np, "fsl,mpc5121-usb2-dr"))
+		return FSL_USB_VER_OLD;
+
+	if (of_device_is_compatible(np, "fsl-usb2-mph")) {
+		if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6"))
+			ver = FSL_USB_VER_1_6;
+		else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2"))
+			ver = FSL_USB_VER_2_2;
+		else /* for previous controller versions */
+			ver = FSL_USB_VER_OLD;
+	}
+
+	return ver;
+}
+
+static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
+{
+	struct device_node *np = ofdev->dev.of_node;
+	struct platform_device *usb_dev;
+	struct fsl_usb2_platform_data data, *pdata;
+	struct fsl_usb2_dev_data *dev_data;
+	const struct of_device_id *match;
+	const unsigned char *prop;
+	static unsigned int idx;
+	int i;
+
+	if (!of_device_is_available(np))
+		return -ENODEV;
+
+	match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
+	if (!match)
+		return -ENODEV;
+
+	pdata = &data;
+	if (match->data)
+		memcpy(pdata, match->data, sizeof(data));
+	else
+		memset(pdata, 0, sizeof(data));
+
+	dev_data = get_dr_mode_data(np);
+
+	if (of_device_is_compatible(np, "fsl-usb2-mph")) {
+		if (of_get_property(np, "port0", NULL))
+			pdata->port_enables |= FSL_USB2_PORT0_ENABLED;
+
+		if (of_get_property(np, "port1", NULL))
+			pdata->port_enables |= FSL_USB2_PORT1_ENABLED;
+
+		pdata->operating_mode = FSL_USB2_MPH_HOST;
+	} else {
+		if (of_get_property(np, "fsl,invert-drvvbus", NULL))
+			pdata->invert_drvvbus = 1;
+
+		if (of_get_property(np, "fsl,invert-pwr-fault", NULL))
+			pdata->invert_pwr_fault = 1;
+
+		/* setup mode selected in the device tree */
+		pdata->operating_mode = dev_data->op_mode;
+	}
+
+	prop = of_get_property(np, "phy_type", NULL);
+	pdata->phy_mode = determine_usb_phy(prop);
+	pdata->controller_ver = usb_get_ver_info(np);
+
+	if (pdata->have_sysif_regs) {
+		if (pdata->controller_ver < 0) {
+			dev_warn(&ofdev->dev, "Could not get controller version\n");
+			return -ENODEV;
+		}
+	}
+
+	for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
+		if (!dev_data->drivers[i])
+			continue;
+		usb_dev = fsl_usb2_device_register(ofdev, pdata,
+					dev_data->drivers[i], idx);
+		if (IS_ERR(usb_dev)) {
+			dev_err(&ofdev->dev, "Can't register usb device\n");
+			return PTR_ERR(usb_dev);
+		}
+	}
+	idx++;
+	return 0;
+}
+
+static int __unregister_subdev(struct device *dev, void *d)
+{
+	platform_device_unregister(to_platform_device(dev));
+	return 0;
+}
+
+static int fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
+{
+	device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
+	return 0;
+}
+
+#ifdef CONFIG_PPC_MPC512x
+
+#define USBGENCTRL		0x200		/* NOTE: big endian */
+#define GC_WU_INT_CLR		(1 << 5)	/* Wakeup int clear */
+#define GC_ULPI_SEL		(1 << 4)	/* ULPI i/f select (usb0 only)*/
+#define GC_PPP			(1 << 3)	/* Inv. Port Power Polarity */
+#define GC_PFP			(1 << 2)	/* Inv. Power Fault Polarity */
+#define GC_WU_ULPI_EN		(1 << 1)	/* Wakeup on ULPI event */
+#define GC_WU_IE		(1 << 1)	/* Wakeup interrupt enable */
+
+#define ISIPHYCTRL		0x204		/* NOTE: big endian */
+#define PHYCTRL_PHYE		(1 << 4)	/* On-chip UTMI PHY enable */
+#define PHYCTRL_BSENH		(1 << 3)	/* Bit Stuff Enable High */
+#define PHYCTRL_BSEN		(1 << 2)	/* Bit Stuff Enable */
+#define PHYCTRL_LSFE		(1 << 1)	/* Line State Filter Enable */
+#define PHYCTRL_PXE		(1 << 0)	/* PHY oscillator enable */
+
+int fsl_usb2_mpc5121_init(struct platform_device *pdev)
+{
+	struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
+	struct clk *clk;
+	int err;
+
+	clk = devm_clk_get(pdev->dev.parent, "ipg");
+	if (IS_ERR(clk)) {
+		dev_err(&pdev->dev, "failed to get clk\n");
+		return PTR_ERR(clk);
+	}
+	err = clk_prepare_enable(clk);
+	if (err) {
+		dev_err(&pdev->dev, "failed to enable clk\n");
+		return err;
+	}
+	pdata->clk = clk;
+
+	if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
+		u32 reg = 0;
+
+		if (pdata->invert_drvvbus)
+			reg |= GC_PPP;
+
+		if (pdata->invert_pwr_fault)
+			reg |= GC_PFP;
+
+		out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
+		out_be32(pdata->regs + USBGENCTRL, reg);
+	}
+	return 0;
+}
+
+static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
+{
+	struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
+
+	pdata->regs = NULL;
+
+	if (pdata->clk)
+		clk_disable_unprepare(pdata->clk);
+}
+
+static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
+	.big_endian_desc = 1,
+	.big_endian_mmio = 1,
+	.es = 1,
+	.have_sysif_regs = 0,
+	.le_setup_buf = 1,
+	.init = fsl_usb2_mpc5121_init,
+	.exit = fsl_usb2_mpc5121_exit,
+};
+#endif /* CONFIG_PPC_MPC512x */
+
+static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = {
+	.have_sysif_regs = 1,
+};
+
+static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
+	{ .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, },
+	{ .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, },
+#ifdef CONFIG_PPC_MPC512x
+	{ .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
+#endif
+	{},
+};
+
+static struct platform_driver fsl_usb2_mph_dr_driver = {
+	.driver = {
+		.name = "fsl-usb2-mph-dr",
+		.of_match_table = fsl_usb2_mph_dr_of_match,
+	},
+	.probe	= fsl_usb2_mph_dr_of_probe,
+	.remove	= fsl_usb2_mph_dr_of_remove,
+};
+
+module_platform_driver(fsl_usb2_mph_dr_driver);
+
+MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
+MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
+MODULE_LICENSE("GPL");