usb: chipidea: otg: add otg file used to access otgsc

This file is mainly used to access otgsc currently, it may
add otg related things in the future.

Tested-by: Marek Vasut <marex@denx.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/chipidea/Makefile b/drivers/usb/chipidea/Makefile
index 6cf5f68..a99d980 100644 (file)
--- a/drivers/usb/chipidea/Makefile
+++ b/drivers/usb/chipidea/Makefile
@@ -2,7 +2,7 @@ ccflags-$(CONFIG_USB_CHIPIDEA_DEBUG) := -DDEBUG
 
 obj-$(CONFIG_USB_CHIPIDEA)             += ci_hdrc.o
 
-ci_hdrc-y                              := core.o
+ci_hdrc-y                              := core.o otg.o
 ci_hdrc-$(CONFIG_USB_CHIPIDEA_UDC)     += udc.o
 ci_hdrc-$(CONFIG_USB_CHIPIDEA_HOST)    += host.o
 ci_hdrc-$(CONFIG_USB_CHIPIDEA_DEBUG)   += debug.o

diff --git a/drivers/usb/chipidea/bits.h b/drivers/usb/chipidea/bits.h
index 1b23e35..464584c 100644 (file)
--- a/drivers/usb/chipidea/bits.h
+++ b/drivers/usb/chipidea/bits.h
@@ -79,11 +79,21 @@
 #define OTGSC_ASVIS          BIT(18)
 #define OTGSC_BSVIS          BIT(19)
 #define OTGSC_BSEIS          BIT(20)
+#define OTGSC_1MSIS          BIT(21)
+#define OTGSC_DPIS           BIT(22)
 #define OTGSC_IDIE           BIT(24)
 #define OTGSC_AVVIE          BIT(25)
 #define OTGSC_ASVIE          BIT(26)
 #define OTGSC_BSVIE          BIT(27)
 #define OTGSC_BSEIE          BIT(28)
+#define OTGSC_1MSIE          BIT(29)
+#define OTGSC_DPIE           BIT(30)
+#define OTGSC_INT_EN_BITS      (OTGSC_IDIE | OTGSC_AVVIE | OTGSC_ASVIE \
+                               | OTGSC_BSVIE | OTGSC_BSEIE | OTGSC_1MSIE \
+                               | OTGSC_DPIE)
+#define OTGSC_INT_STATUS_BITS  (OTGSC_IDIS | OTGSC_AVVIS | OTGSC_ASVIS \
+                               | OTGSC_BSVIS | OTGSC_BSEIS | OTGSC_1MSIS \
+                               | OTGSC_DPIS)
 
 /* USBMODE */
 #define USBMODE_CM            (0x03UL <<  0)

diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 13dbd51..2f70080 100644 (file)
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -72,6 +72,7 @@
 #include "bits.h"
 #include "host.h"
 #include "debug.h"
+#include "otg.h"
 
 /* Controller register map */
 static uintptr_t ci_regs_nolpm[] = {
@@ -528,7 +529,7 @@ static int ci_hdrc_probe(struct platform_device *pdev)
                goto stop;
 
        if (ci->is_otg)
-               hw_write(ci, OP_OTGSC, OTGSC_IDIE, OTGSC_IDIE);
+               ci_hdrc_otg_init(ci);
 
        ret = dbg_create_files(ci);
        if (!ret)

diff --git a/drivers/usb/chipidea/otg.c b/drivers/usb/chipidea/otg.c
new file mode 100644 (file)
index 0000000..999a085
--- /dev/null
+++ b/drivers/usb/chipidea/otg.c
@@ -0,0 +1,35 @@
+/*
+ * otg.c - ChipIdea USB IP core OTG driver
+ *
+ * Copyright (C) 2013 Freescale Semiconductor, Inc.
+ *
+ * Author: Peter Chen
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * This file mainly handles otgsc register, it may include OTG operation
+ * in the future.
+ */
+
+#include <linux/usb/otg.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/chipidea.h>
+
+#include "ci.h"
+#include "bits.h"
+#include "otg.h"
+
+/**
+ * ci_hdrc_otg_init - initialize otgsc bits
+ * ci: the controller
+ */
+int ci_hdrc_otg_init(struct ci_hdrc *ci)
+{
+       ci_enable_otg_interrupt(ci, OTGSC_IDIE);
+
+       return 0;
+}

diff --git a/drivers/usb/chipidea/otg.h b/drivers/usb/chipidea/otg.h
new file mode 100644 (file)
index 0000000..376eaee
--- /dev/null
+++ b/drivers/usb/chipidea/otg.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2013 Freescale Semiconductor, Inc.
+ *
+ * Author: Peter Chen
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __DRIVERS_USB_CHIPIDEA_OTG_H
+#define __DRIVERS_USB_CHIPIDEA_OTG_H
+
+static inline void ci_clear_otg_interrupt(struct ci_hdrc *ci, u32 bits)
+{
+       /* Only clear request bits */
+       hw_write(ci, OP_OTGSC, OTGSC_INT_STATUS_BITS, bits);
+}
+
+static inline void ci_enable_otg_interrupt(struct ci_hdrc *ci, u32 bits)
+{
+       hw_write(ci, OP_OTGSC, bits, bits);
+}
+
+static inline void ci_disable_otg_interrupt(struct ci_hdrc *ci, u32 bits)
+{
+       hw_write(ci, OP_OTGSC, bits, 0);
+}
+
+int ci_hdrc_otg_init(struct ci_hdrc *ci);
+
+#endif /* __DRIVERS_USB_CHIPIDEA_OTG_H */