ENGR00116558: MX233: USB pin detect

MX233: Restructure the STMP378xxx USB Host and Gadget device structures
to be similar to MXC structures. Enable fsl_otg_arc driver to work on
MX233 platform. Remove FSL_USB2_DONT_REMAP requirement.

Signed-off-by: Dinh Nguyen <Dinh.Nguyen@freescale.com>

Conflicts:

	arch/arm/mach-stmp3xxx/Kconfig
	arch/arm/mach-stmp3xxx/Makefile
	arch/arm/mach-stmp3xxx/devices.c
	arch/arm/mach-stmp3xxx/include/mach/stmp3xxx.h
	arch/arm/mach-stmp3xxx/stmp378x_devb.c

1 files changed, 312 insertions, 0 deletions

diff --git a/arch/arm/plat-stmp3xxx/usb_common.c b/arch/arm/plat-stmp3xxx/usb_common.c
new file mode 100644
index 000000000000..aac884cd1eb6
--- /dev/null
+++ b/arch/arm/plat-stmp3xxx/usb_common.c
@@ -0,0 +1,312 @@
+/*
+ * Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ *	otg_{get,set}_transceiver() are from arm/plat-omap/usb.c.
+ *	which is Copyright (C) 2004 Texas Instruments, Inc.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+/*!
+ *@defgroup USB ARC OTG USB Driver
+ */
+
+/*!
+ * @file usb_common.c
+ *
+ * @brief platform related part of usb driver.
+ * @ingroup USB
+ */
+
+/*!
+ *Include files
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/fsl_devices.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/fsl_xcvr.h>
+#include <mach/arc_otg.h>
+#include <mach/platform.h>
+#include <mach/regs-power.h>
+#include <mach/regs-digctl.h>
+#include <mach/regs-clkctrl.h>
+#include <mach/regs-usbctrl.h>
+#include <mach/regs-usbphy.h>
+#include <mach/pinmux.h>
+
+#define MXC_NUMBER_USB_TRANSCEIVER 6
+struct fsl_xcvr_ops *g_xc_ops[MXC_NUMBER_USB_TRANSCEIVER] = { NULL };
+
+void fsl_usb_xcvr_register(struct fsl_xcvr_ops *xcvr_ops)
+{
+	int i;
+
+	pr_debug("%s\n", __func__);
+	for (i = 0; i < MXC_NUMBER_USB_TRANSCEIVER; i++) {
+		if (g_xc_ops[i] == NULL) {
+			g_xc_ops[i] = xcvr_ops;
+			return;
+		}
+	}
+
+	pr_debug("Failed %s\n", __func__);
+}
+EXPORT_SYMBOL(fsl_usb_xcvr_register);
+
+void fsl_usb_xcvr_unregister(struct fsl_xcvr_ops *xcvr_ops)
+{
+	int i;
+
+	pr_debug("%s\n", __func__);
+	for (i = 0; i < MXC_NUMBER_USB_TRANSCEIVER; i++) {
+		if (g_xc_ops[i] == xcvr_ops) {
+			g_xc_ops[i] = NULL;
+			return;
+		}
+	}
+
+	pr_debug("Failed %s\n", __func__);
+}
+EXPORT_SYMBOL(fsl_usb_xcvr_unregister);
+
+#if defined(CONFIG_USB_OTG)
+static struct otg_transceiver *xceiv;
+
+/**
+ * otg_get_transceiver - find the (single) OTG transceiver driver
+ *
+ * Returns the transceiver driver, after getting a refcount to it; or
+ * null if there is no such transceiver.  The caller is responsible for
+ * releasing that count.
+ */
+struct otg_transceiver *otg_get_transceiver(void)
+{
+	pr_debug("%s xceiv=0x%p\n", __func__, xceiv);
+	if (xceiv)
+		get_device(xceiv->dev);
+	return xceiv;
+}
+EXPORT_SYMBOL(otg_get_transceiver);
+
+int otg_set_transceiver(struct otg_transceiver *x)
+{
+	pr_debug("%s xceiv=0x%p  x=0x%p\n", __func__, xceiv, x);
+	/*
+	if (x == NULL)
+		stmp3xxx_release_pin_group(&usb_mux_pins, "usb");
+		*/
+	if (xceiv && x)
+		return -EBUSY;
+	xceiv = x;
+	return 0;
+}
+EXPORT_SYMBOL(otg_set_transceiver);
+
+static struct resource *otg_resources;
+
+struct resource *otg_get_resources(void)
+{
+	pr_debug("otg_get_resources\n");
+	return otg_resources;
+}
+EXPORT_SYMBOL(otg_get_resources);
+
+int otg_set_resources(struct resource *resources)
+{
+	//stmp3xxx_request_pin_group(&usb_mux_pins, "usb");
+	otg_resources = resources;
+	return 0;
+}
+EXPORT_SYMBOL(otg_set_resources);
+#endif
+
+static struct fsl_xcvr_ops *fsl_usb_get_xcvr(char *name)
+{
+	int i;
+
+	pr_debug("%s\n", __func__);
+	if (name == NULL) {
+		printk(KERN_ERR "get_xcvr(): No tranceiver name\n");
+		return NULL;
+	}
+
+	for (i = 0; i < MXC_NUMBER_USB_TRANSCEIVER; i++) {
+		if (strcmp(g_xc_ops[i]->name, name) == 0) {
+			return g_xc_ops[i];
+		}
+	}
+	pr_debug("Failed %s\n", __func__);
+	return NULL;
+}
+
+/* The dmamask must be set for EHCI to work */
+static u64 ehci_dmamask = ~(u32) 0;
+
+static int instance_id;
+struct platform_device *host_pdev_register(struct resource *res, int n_res,
+					   struct fsl_usb2_platform_data *config)
+{
+	struct platform_device *pdev;
+	int rc;
+	instance_id = 0;
+
+	pr_debug("register host res=0x%p, size=%d\n", res, n_res);
+
+	pdev = platform_device_register_simple("fsl-ehci",
+					       instance_id, res, n_res);
+	if (IS_ERR(pdev)) {
+		pr_debug("can't register %s Host, %ld\n",
+			 config->name, PTR_ERR(pdev));
+		return NULL;
+	}
+
+	pdev->dev.coherent_dma_mask = 0xffffffff;
+	pdev->dev.dma_mask = &ehci_dmamask;
+
+	/*
+	 * platform_device_add_data() makes a copy of
+	 * the platform_data passed in.  That makes it
+	 * impossible to share the same config struct for
+	 * all OTG devices (host,gadget,otg).  So, just
+	 * set the platorm_data pointer ourselves.
+	 */
+	rc = platform_device_add_data(pdev, config,
+				      sizeof(struct fsl_usb2_platform_data));
+	if (rc) {
+		platform_device_unregister(pdev);
+		return NULL;
+	}
+
+	pr_debug(KERN_INFO "usb: %s host (%s) registered\n", config->name,
+	       config->transceiver);
+	pr_debug("pdev=0x%p  dev=0x%p  resources=0x%p  pdata=0x%p\n",
+		 pdev, &pdev->dev, pdev->resource, pdev->dev.platform_data);
+
+	instance_id++;
+
+	return pdev;
+}
+
+int usb_phy_enable(void)
+{
+	u32 tmp;
+	/*
+	* Set these bits so that we can force the OTG bits high
+	* so the ARC core operates properly
+	*/
+	stmp3xxx_clearl(BM_POWER_CTRL_CLKGATE,
+		      REGS_POWER_BASE + HW_POWER_CTRL);
+	stmp3xxx_setl(BM_POWER_DEBUG_VBUSVALIDPIOLOCK |
+			 BM_POWER_DEBUG_AVALIDPIOLOCK |
+			 BM_POWER_DEBUG_BVALIDPIOLOCK,
+			 REGS_POWER_BASE + HW_POWER_DEBUG);
+	tmp = __raw_readl(REGS_POWER_BASE + HW_POWER_STS);
+	tmp |= BM_POWER_STS_BVALID | BM_POWER_STS_AVALID |
+		       BM_POWER_STS_VBUSVALID;
+	__raw_writel(tmp, REGS_POWER_BASE + HW_POWER_STS);
+
+	/* Reset USBPHY module */
+	stmp3xxx_setl(BM_USBPHY_CTRL_SFTRST,
+		      REGS_USBPHY_BASE + HW_USBPHY_CTRL);
+	udelay(10);
+
+	/* Remove CLKGATE and SFTRST */
+	stmp3xxx_clearl(BM_USBPHY_CTRL_CLKGATE | BM_USBPHY_CTRL_SFTRST,
+		      REGS_USBPHY_BASE + HW_USBPHY_CTRL);
+
+	/* Turn on the USB clocks */
+	stmp3xxx_setl(BM_CLKCTRL_PLLCTRL0_EN_USB_CLKS,
+		     REGS_CLKCTRL_BASE + HW_CLKCTRL_PLLCTRL0);
+	stmp3xxx_clearl(BM_DIGCTL_CTRL_USB_CLKGATE,
+		      REGS_DIGCTL_BASE + HW_DIGCTL_CTRL);
+
+	/* set UTMI xcvr */
+	/* Workaround an IC issue for ehci driver:
+	 * when turn off root hub port power, EHCI set
+	 * PORTSC reserved bits to be 0, but PTW with 0
+	 * means 8 bits tranceiver width, here change
+	 * it back to be 16 bits and do PHY diable and
+	 * then enable.
+	 */
+	tmp = __raw_readl(REGS_USBCTRL_BASE + HW_USBCTRL_PORTSC1) & ~PORTSC_PTS_MASK;
+	tmp |= (PORTSC_PTS_UTMI | PORTSC_PTW);
+	__raw_writel(tmp, REGS_USBCTRL_BASE + HW_USBCTRL_PORTSC1);
+
+	/* Power up the PHY */
+	__raw_writel(0, REGS_USBPHY_BASE + HW_USBPHY_PWD);
+
+	/*
+	* Set precharge bit to cure overshoot problems at the
+	* start of packets
+	*/
+	stmp3xxx_setl(1, REGS_USBPHY_BASE + HW_USBPHY_CTRL);
+
+#if defined(CONFIG_USB_EHCI_HCD) || defined(CONFIG_USB_EHCI_HCD_MODULE)
+	/* enable disconnect detector */
+	/* enable disconnect detector must be after entry high speed mode*/
+	/*HW_USBPHY_CTRL_SET(BM_USBPHY_CTRL_ENHOSTDISCONDETECT);
+	*/
+#endif
+	return 0;
+}
+EXPORT_SYMBOL(usb_phy_enable);
+
+static int otg_used;
+
+int usbotg_init(struct platform_device *pdev)
+{
+	struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
+	struct fsl_xcvr_ops *xops;
+
+	pr_debug("%s: pdev=0x%p  pdata=0x%p\n", __func__, pdev, pdata);
+
+	xops = fsl_usb_get_xcvr(pdata->transceiver);
+	if (!xops) {
+		printk(KERN_ERR "DR transceiver ops missing\n");
+		return -EINVAL;
+	}
+	pdata->xcvr_ops = xops;
+	pdata->xcvr_type = xops->xcvr_type;
+	pdata->pdev = pdev;
+
+	otg_used = 0;
+	if (!otg_used) {
+		pr_debug("%s: grab pins\n", __func__);
+		if (xops->init)
+			xops->init(xops);
+		usb_phy_enable();
+	}
+
+	otg_used++;
+	pr_debug("%s: success\n", __func__);
+	return 0;
+}
+EXPORT_SYMBOL(usbotg_init);
+
+void usbotg_uninit(struct fsl_usb2_platform_data *pdata)
+{
+	pr_debug("%s\n", __func__);
+
+	if (pdata->xcvr_ops && pdata->xcvr_ops->uninit)
+		pdata->xcvr_ops->uninit(pdata->xcvr_ops);
+
+	pdata->regs = NULL;
+	otg_used--;
+}
+EXPORT_SYMBOL(usbotg_uninit);