Patchwork [U-Boot] USB: S5P: Add ehci support

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Submitter Rajeshwari Birje
Date April 30, 2012, 3:54 p.m.
Message ID <1335801242-7732-1-git-send-email-rajeshwari.s@samsung.com>
Download mbox | patch
Permalink /patch/155920/
State Changes Requested
Headers show

Comments

Rajeshwari Birje - April 30, 2012, 3:54 p.m.
This patch adds ehci driver support  for s5p.

Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
---
 arch/arm/include/asm/arch-exynos/ehci-s5p.h |   66 ++++++++++++++++
 drivers/usb/host/Makefile                   |    1 +
 drivers/usb/host/ehci-s5p.c                 |  113 +++++++++++++++++++++++++++
 3 files changed, 180 insertions(+), 0 deletions(-)
 create mode 100755 arch/arm/include/asm/arch-exynos/ehci-s5p.h
 create mode 100644 drivers/usb/host/ehci-s5p.c

Patch

diff --git a/arch/arm/include/asm/arch-exynos/ehci-s5p.h b/arch/arm/include/asm/arch-exynos/ehci-s5p.h
new file mode 100755
index 0000000..68feb85
--- /dev/null
+++ b/arch/arm/include/asm/arch-exynos/ehci-s5p.h
@@ -0,0 +1,66 @@ 
+/*
+ * SAMSUNG S5P USB HOST EHCI Controller
+ *
+ * Copyright (C) 2012 Samsung Electronics Co.Ltd
+ *	Vivek Gautam <gautam.vivek@samsung.com>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#ifndef __ASM_ARM_ARCH_EXYNOS5_EHCI_S5P_H__
+#define __ASM_ARM_ARCH_EXYNOS5_EHCI_S5P_H__
+
+#define CLK_24MHZ		5
+
+#define HOST_CTRL0_PHYSWRSTALL			(1 << 31)
+#define HOST_CTRL0_COMMONON_N			(1 << 9)
+#define HOST_CTRL0_SIDDQ			(1 << 6)
+#define HOST_CTRL0_FORCESLEEP			(1 << 5)
+#define HOST_CTRL0_FORCESUSPEND			(1 << 4)
+#define HOST_CTRL0_WORDINTERFACE		(1 << 3)
+#define HOST_CTRL0_UTMISWRST			(1 << 2)
+#define HOST_CTRL0_LINKSWRST			(1 << 1)
+#define HOST_CTRL0_PHYSWRST			(1 << 0)
+
+#define HOST_CTRL0_FSEL_MASK			(7 << 16)
+
+#define EHCICTRL_ENAINCRXALIGN			(1 << 29)
+#define EHCICTRL_ENAINCR4			(1 << 28)
+#define EHCICTRL_ENAINCR8			(1 << 27)
+#define EHCICTRL_ENAINCR16			(1 << 26)
+
+/* Register map for PHY control */
+struct s5p_usb_phy {
+	unsigned int usbphyctrl0;
+	unsigned int usbphytune0;
+	unsigned int reserved1[2];
+	unsigned int hsicphyctrl1;
+	unsigned int hsicphytune1;
+	unsigned int reserved2[2];
+	unsigned int hsicphyctrl2;
+	unsigned int hsicphytune2;
+	unsigned int reserved3[2];
+	unsigned int ehcictrl;
+	unsigned int ohcictrl;
+	unsigned int usbotgsys;
+	unsigned int reserved4;
+	unsigned int usbotgtune;
+};
+
+/* Switch on the VBUS power. */
+int board_usb_vbus_init(void);
+
+#endif /* __ASM_ARM_ARCH_EXYNOS5_EHCI_S5P_H__ */
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 0d4657e..59c3e57 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -50,6 +50,7 @@  COBJS-$(CONFIG_USB_EHCI_PPC4XX) += ehci-ppc4xx.o
 COBJS-$(CONFIG_USB_EHCI_IXP4XX) += ehci-ixp.o
 COBJS-$(CONFIG_USB_EHCI_MARVELL) += ehci-marvell.o
 COBJS-$(CONFIG_USB_EHCI_PCI) += ehci-pci.o
+COBJS-$(CONFIG_USB_EHCI_S5P) += ehci-s5p.o
 COBJS-$(CONFIG_USB_EHCI_TEGRA) += ehci-tegra.o
 COBJS-$(CONFIG_USB_EHCI_VCT) += ehci-vct.o
 
diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
new file mode 100644
index 0000000..ac9f061
--- /dev/null
+++ b/drivers/usb/host/ehci-s5p.c
@@ -0,0 +1,113 @@ 
+/*
+ * SAMSUNG S5P USB HOST EHCI Controller
+ *
+ * Copyright (C) 2012 Samsung Electronics Co.Ltd
+ *	Vivek Gautam <gautam.vivek@samsung.com>
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <common.h>
+#include <usb.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/ehci-s5p.h>
+#include "ehci.h"
+#include "ehci-core.h"
+
+/* Setup the EHCI host controller. */
+static void setup_usb_phy(struct s5p_usb_phy *usb)
+{
+	unsigned int hostphy_ctrl0;
+
+	/* Setting up host and device simultaneously */
+	hostphy_ctrl0 = readl(&usb->usbphyctrl0);
+	hostphy_ctrl0 &= ~(HOST_CTRL0_FSEL_MASK |
+			   HOST_CTRL0_COMMONON_N |
+			   /* HOST Phy setting */
+			   HOST_CTRL0_PHYSWRST |
+			   HOST_CTRL0_PHYSWRSTALL |
+			   HOST_CTRL0_SIDDQ |
+			   HOST_CTRL0_FORCESUSPEND |
+			   HOST_CTRL0_FORCESLEEP);
+	hostphy_ctrl0 |= (/* Setting up the ref freq */
+			  CLK_24MHZ << 16 |
+			  /* HOST Phy setting */
+			  HOST_CTRL0_LINKSWRST |
+			  HOST_CTRL0_UTMISWRST);
+	writel(hostphy_ctrl0, &usb->usbphyctrl0);
+	udelay(10);
+	clrbits_le32(&usb->usbphyctrl0,
+			HOST_CTRL0_LINKSWRST |
+			HOST_CTRL0_UTMISWRST);
+	udelay(20);
+
+	/* EHCI Ctrl setting */
+	setbits_le32(&usb->ehcictrl,
+			EHCICTRL_ENAINCRXALIGN |
+			EHCICTRL_ENAINCR4 |
+			EHCICTRL_ENAINCR8 |
+			EHCICTRL_ENAINCR16);
+}
+
+/* Reset the EHCI host controller. */
+static void reset_usb_phy(struct s5p_usb_phy *usb)
+{
+	/* HOST_PHY reset */
+	setbits_le32(&usb->usbphyctrl0,
+			HOST_CTRL0_PHYSWRST |
+			HOST_CTRL0_PHYSWRSTALL |
+			HOST_CTRL0_SIDDQ |
+			HOST_CTRL0_FORCESUSPEND |
+			HOST_CTRL0_FORCESLEEP);
+}
+
+/*
+ * EHCI-initialization
+ * Create the appropriate control structures to manage
+ * a new EHCI host controller.
+ */
+int ehci_hcd_init(void)
+{
+	struct s5p_usb_phy *usb;
+
+	usb = (struct s5p_usb_phy *)samsung_get_base_usb_phy();
+	setup_usb_phy(usb);
+
+	hccr = (struct ehci_hccr *)(EXYNOS5_USB_HOST_EHCI_BASE);
+	hcor = (struct ehci_hcor *)((uint32_t) hccr
+				+ HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
+
+	printf("\n usb cmd addr = %x", &hcor->or_usbcmd);
+	debug("Exynos5-ehci: init hccr %x and hcor %x hc_length %d\n",
+		(uint32_t)hccr, (uint32_t)hcor,
+		(uint32_t)HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
+
+	return 0;
+}
+
+/*
+ * Destroy the appropriate control structures corresponding
+ * the EHCI host controller.
+ */
+int ehci_hcd_stop()
+{
+	struct s5p_usb_phy *usb;
+
+	usb = (struct s5p_usb_phy *)samsung_get_base_usb_phy();
+	reset_usb_phy(usb);
+
+	return 0;
+}