From 5b591502f9fc340df8fb1e3bec918009ba3bc313 Mon Sep 17 00:00:00 2001
From: Stefano Babic <sbabic@denx.de>
Date: Wed, 6 Oct 2010 09:00:01 +0200
Subject: MX31: Add support for MXC EHCI controller

The patch adds the EHCI controller for the i.MX31 Soc.

Signed-off-by: Stefano Babic <sbabic@denx.de>

diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 255679a..399520e 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -36,6 +36,7 @@ COBJS-$(CONFIG_USB_SL811HS) += sl811-hcd.o
 # echi
 COBJS-$(CONFIG_USB_EHCI) += ehci-hcd.o
 COBJS-$(CONFIG_USB_EHCI_FSL) += ehci-fsl.o
+COBJS-$(CONFIG_USB_EHCI_MXC) += ehci-mxc.o
 COBJS-$(CONFIG_USB_EHCI_PPC4XX) += ehci-ppc4xx.o
 COBJS-$(CONFIG_USB_EHCI_IXP4XX) += ehci-ixp.o
 COBJS-$(CONFIG_USB_EHCI_KIRKWOOD) += ehci-kirkwood.o
diff --git a/drivers/usb/host/ehci-mxc.c b/drivers/usb/host/ehci-mxc.c
new file mode 100644
index 0000000..af8ee90
--- /dev/null
+++ b/drivers/usb/host/ehci-mxc.c
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
+ *
+ * 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 <common.h>
+#include <usb.h>
+#include <asm/io.h>
+#include <asm/arch/mx31-regs.h>
+#include <usb/ehci-fsl.h>
+#include <errno.h>
+
+#include "ehci.h"
+#include "ehci-core.h"
+
+#define USBCTRL_OTGBASE_OFFSET	0x600
+
+#define MX31_OTG_SIC_SHIFT	29
+#define MX31_OTG_SIC_MASK	(0x3 << MX31_OTG_SIC_SHIFT)
+#define MX31_OTG_PM_BIT		(1 << 24)
+
+#define MX31_H2_SIC_SHIFT	21
+#define MX31_H2_SIC_MASK	(0x3 << MX31_H2_SIC_SHIFT)
+#define MX31_H2_PM_BIT		(1 << 16)
+#define MX31_H2_DT_BIT		(1 << 5)
+
+#define MX31_H1_SIC_SHIFT	13
+#define MX31_H1_SIC_MASK	(0x3 << MX31_H1_SIC_SHIFT)
+#define MX31_H1_PM_BIT		(1 << 8)
+#define MX31_H1_DT_BIT		(1 << 4)
+
+static int mxc_set_usbcontrol(int port, unsigned int flags)
+{
+	unsigned int v;
+#ifdef CONFIG_MX31
+		v = readl(MX31_OTG_BASE_ADDR + USBCTRL_OTGBASE_OFFSET);
+
+		switch (port) {
+		case 0:	/* OTG port */
+			v &= ~(MX31_OTG_SIC_MASK | MX31_OTG_PM_BIT);
+			v |= (flags & MXC_EHCI_INTERFACE_MASK)
+					<< MX31_OTG_SIC_SHIFT;
+			if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
+				v |= MX31_OTG_PM_BIT;
+
+			break;
+		case 1: /* H1 port */
+			v &= ~(MX31_H1_SIC_MASK | MX31_H1_PM_BIT |
+				MX31_H1_DT_BIT);
+			v |= (flags & MXC_EHCI_INTERFACE_MASK)
+						<< MX31_H1_SIC_SHIFT;
+			if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
+				v |= MX31_H1_PM_BIT;
+
+			if (!(flags & MXC_EHCI_TTL_ENABLED))
+				v |= MX31_H1_DT_BIT;
+
+			break;
+		case 2:	/* H2 port */
+			v &= ~(MX31_H2_SIC_MASK | MX31_H2_PM_BIT |
+				MX31_H2_DT_BIT);
+			v |= (flags & MXC_EHCI_INTERFACE_MASK)
+						<< MX31_H2_SIC_SHIFT;
+			if (!(flags & MXC_EHCI_POWER_PINS_ENABLED))
+				v |= MX31_H2_PM_BIT;
+
+			if (!(flags & MXC_EHCI_TTL_ENABLED))
+				v |= MX31_H2_DT_BIT;
+
+			break;
+		default:
+			return -EINVAL;
+		}
+
+		writel(v, MX31_OTG_BASE_ADDR +
+				     USBCTRL_OTGBASE_OFFSET);
+#endif
+		return 0;
+}
+
+int ehci_hcd_init(void)
+{
+	u32 tmp;
+	struct usb_ehci *ehci;
+	struct clock_control_regs *sc_regs =
+		(struct clock_control_regs *)CCM_BASE;
+
+	tmp = __raw_readl(&sc_regs->ccmr);
+	__raw_writel(__raw_readl(&sc_regs->ccmr) | (1 << 9), &sc_regs->ccmr) ;
+
+	udelay(80);
+
+	/* Take USB2 */
+	ehci = (struct usb_ehci *)(MX31_OTG_BASE_ADDR +
+		(0x200 * CONFIG_MXC_USB_PORT));
+	hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
+	hcor = (struct ehci_hcor *)((uint32_t) hccr +
+			HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
+	setbits_le32(&ehci->usbmode, CM_HOST);
+	setbits_le32(&ehci->control, USB_EN);
+
+	__raw_writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc);
+
+	mxc_set_usbcontrol(CONFIG_MXC_USB_PORT, CONFIG_MXC_USB_FLAGS);
+
+	return 0;
+}
+
+/*
+ * Destroy the appropriate control structures corresponding
+ * the the EHCI host controller.
+ */
+int ehci_hcd_stop(void)
+{
+	return 0;
+}
-- 
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