usb: gadget: bcm_udc_otg files

Add the required files for the Broadcom UDC OTG interface.

Signed-off-by: Jiandong Zheng <jdzheng@broadcom.com>
Signed-off-by: Steve Rae <srae@broadcom.com>

3 files changed, 80 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-bcm281xx/sysmap.h b/arch/arm/include/asm/arch-bcm281xx/sysmap.h
index 93ebf3429a..dbcc88cb90 100644
--- a/arch/arm/include/asm/arch-bcm281xx/sysmap.h
+++ b/arch/arm/include/asm/arch-bcm281xx/sysmap.h
@@ -27,4 +27,11 @@
 #define SECWD2_BASE_ADDR	0x35002f40
 #define TIMER_BASE_ADDR		0x3e00d000
 
+#define HSOTG_DCTL_OFFSET					0x00000804
+#define    HSOTG_DCTL_SFTDISCON_MASK				0x00000002
+
+#define HSOTG_CTRL_PHY_P1CTL_OFFSET				0x00000008
+#define    HSOTG_CTRL_PHY_P1CTL_SOFT_RESET_MASK			0x00000002
+#define    HSOTG_CTRL_PHY_P1CTL_NON_DRIVING_MASK		0x00000001
+
 #endif
diff --git a/drivers/usb/gadget/bcm_udc_otg.h b/drivers/usb/gadget/bcm_udc_otg.h
new file mode 100644
index 0000000000..d47aefaa89
--- /dev/null
+++ b/drivers/usb/gadget/bcm_udc_otg.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright 2015 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __BCM_UDC_OTG_H
+#define __BCM_UDC_OTG_H
+
+#include <common.h>
+
+static inline void wfld_set(uintptr_t addr, uint32_t fld_val, uint32_t fld_mask)
+{
+	writel(((readl(addr) & ~(fld_mask)) | (fld_val)), (addr));
+}
+
+static inline void wfld_clear(uintptr_t addr, uint32_t fld_mask)
+{
+	writel((readl(addr) & ~(fld_mask)), (addr));
+}
+
+#endif
diff --git a/drivers/usb/gadget/bcm_udc_otg_phy.c b/drivers/usb/gadget/bcm_udc_otg_phy.c
new file mode 100644
index 0000000000..f8690b034c
--- /dev/null
+++ b/drivers/usb/gadget/bcm_udc_otg_phy.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2015 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <config.h>
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/sysmap.h>
+
+#include <usb/s3c_udc.h>
+#include "bcm_udc_otg.h"
+
+void otg_phy_init(struct s3c_udc *dev)
+{
+	/* set Phy to driving mode */
+	wfld_clear(HSOTG_CTRL_BASE_ADDR + HSOTG_CTRL_PHY_P1CTL_OFFSET,
+		   HSOTG_CTRL_PHY_P1CTL_NON_DRIVING_MASK);
+
+	udelay(100);
+
+	/* clear Soft Disconnect */
+	wfld_clear(HSOTG_BASE_ADDR + HSOTG_DCTL_OFFSET,
+		   HSOTG_DCTL_SFTDISCON_MASK);
+
+	/* invoke Reset (active low) */
+	wfld_clear(HSOTG_CTRL_BASE_ADDR + HSOTG_CTRL_PHY_P1CTL_OFFSET,
+		   HSOTG_CTRL_PHY_P1CTL_SOFT_RESET_MASK);
+
+	/* Reset needs to be asserted for 2ms */
+	udelay(2000);
+
+	/* release Reset */
+	wfld_set(HSOTG_CTRL_BASE_ADDR + HSOTG_CTRL_PHY_P1CTL_OFFSET,
+		 HSOTG_CTRL_PHY_P1CTL_SOFT_RESET_MASK,
+		 HSOTG_CTRL_PHY_P1CTL_SOFT_RESET_MASK);
+}
+
+void otg_phy_off(struct s3c_udc *dev)
+{
+	/* Soft Disconnect */
+	wfld_set(HSOTG_BASE_ADDR + HSOTG_DCTL_OFFSET,
+		 HSOTG_DCTL_SFTDISCON_MASK,
+		 HSOTG_DCTL_SFTDISCON_MASK);
+
+	/* set Phy to non-driving (reset) mode */
+	wfld_set(HSOTG_CTRL_BASE_ADDR + HSOTG_CTRL_PHY_P1CTL_OFFSET,
+		 HSOTG_CTRL_PHY_P1CTL_NON_DRIVING_MASK,
+		 HSOTG_CTRL_PHY_P1CTL_NON_DRIVING_MASK);
+}