This patch makes it possible to set the chipidea udc
into full-speed only mode. It can be set by the oftree
property "force-full-speed".
Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
---
drivers/usb/chipidea/bits.h | 1 +
drivers/usb/chipidea/core.c | 5 +++++
include/linux/usb/chipidea.h | 1 +
3 files changed, 7 insertions(+)
diff --git a/drivers/usb/chipidea/bits.h b/drivers/usb/chipidea/bits.h
index 3cded5f..85b6b09 100644
--- a/drivers/usb/chipidea/bits.h
+++ b/drivers/usb/chipidea/bits.h
@@ -51,6 +51,7 @@
#define PORTSC_PTS (BIT(31) | BIT(30))
#define PORTSC_PTW BIT(28)
#define PORTSC_STS BIT(29)
+#define PORTSC_PFSC BIT(24)
/* DEVLC */
#define DEVLC_PSPD (0x03UL << 25)
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 7e80f1b..bc99cea 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -230,6 +230,9 @@ void hw_portsc_configure(struct ci13xxx *ci)
hw_write(ci, OP_PORTSC, PORTSC_PTS, 0x3 << ffs_nr(PORTSC_PTS));
hw_write(ci, OP_PORTSC, PORTSC_STS, 0x1 << ffs_nr(PORTSC_STS));
}
+
+ if (ci->platdata->flags & CI13XXX_PORTSC_PFSC)
+ hw_write(ci, OP_PORTSC, PORTSC_PFSC, 0x1 << ffs_nr(PORTSC_PFSC));
}
/**
@@ -566,6 +569,8 @@ void ci13xxx_get_dr_flags(struct device_node *of_node, struct ci13xxx_platform_d
pr_err("no phy interface defined\n");
}
+ if (of_find_property(of_node, "force-full-speed", NULL))
+ pdata->flags |= CI13XXX_PORTSC_PFSC;
}
EXPORT_SYMBOL_GPL(ci13xxx_get_dr_flags);
diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
index cafca23..9ffe105 100644
--- a/include/linux/usb/chipidea.h
+++ b/include/linux/usb/chipidea.h
@@ -26,6 +26,7 @@ struct ci13xxx_platform_data {
#define CI13XXX_PORTSC_PTS_UTMI BIT(8)
#define CI13XXX_PORTSC_PTS_ULPI BIT(9)
#define CI13XXX_PORTSC_PTS_FSLS BIT(10)
+#define CI13XXX_PORTSC_PFSC BIT(11)
#define CI13XXX_DR_MODE_MASK \
(CI13XXX_DR_MODE_HOST | CI13XXX_DR_MODE_PERIPHERAL)
--
1.7.10.4
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