usb: chipidea: add support for roles
Add some generic code for roles and implement simple role switching
based on ID pin state and/or a sysfs file. At this, we also rename
the device to ci_hdrc, which is what it is.
The "manual" switch is made into a sysfs file and not debugfs, because
it might be useful even in non-debug context. For some boards, like
sheevaplug, it seems to be the only way to switch roles without modifying
the hardware, since the ID pin is always grounded.
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/bits.h b/drivers/usb/chipidea/bits.h
index 5fbff11..62c35af 100644
--- a/drivers/usb/chipidea/bits.h
+++ b/drivers/usb/chipidea/bits.h
@@ -50,6 +50,24 @@
#define DEVLC_PSPD (0x03UL << 25)
#define DEVLC_PSPD_HS (0x02UL << 25)
+/* OTGSC */
+#define OTGSC_IDPU BIT(5)
+#define OTGSC_ID BIT(8)
+#define OTGSC_AVV BIT(9)
+#define OTGSC_ASV BIT(10)
+#define OTGSC_BSV BIT(11)
+#define OTGSC_BSE BIT(12)
+#define OTGSC_IDIS BIT(16)
+#define OTGSC_AVVIS BIT(17)
+#define OTGSC_ASVIS BIT(18)
+#define OTGSC_BSVIS BIT(19)
+#define OTGSC_BSEIS BIT(20)
+#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)
+
/* USBMODE */
#define USBMODE_CM (0x03UL << 0)
#define USBMODE_CM_IDLE (0x00UL << 0)