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From 63f957c06c366e02bb5ea89a0b57ea5971befd77 Mon Sep 17 00:00:00 2001
From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Date: Thu, 30 Mar 2017 11:16:04 +0900
Subject: [PATCH 133/286] usb: gadget: udc: renesas_usb3: add USB ID signal
monitoring
This usb 3.0 peripheral controller has a register (USB_OTG_STA) to monitor
the USB ID signal. So, this patch adds the ID signal monitoring to change
the mode to host (A-Host) or peripheral (B-Peripheral).
This patch also removes hardcoded setting as B-Peripheral mode.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
(cherry picked from commit 77172a1f886a696bab5b4d3006ccf55ee4b1bfe5)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
---
drivers/usb/gadget/udc/renesas_usb3.c | 67 +++++++++++++++++++++++++++++++---
1 file changed, 63 insertions(+), 4 deletions(-)
--- a/drivers/usb/gadget/udc/renesas_usb3.c
+++ b/drivers/usb/gadget/udc/renesas_usb3.c
@@ -37,6 +37,9 @@
#define USB3_USB_INT_ENA_2 0x22c
#define USB3_STUP_DAT_0 0x230
#define USB3_STUP_DAT_1 0x234
+#define USB3_USB_OTG_STA 0x268
+#define USB3_USB_OTG_INT_STA 0x26c
+#define USB3_USB_OTG_INT_ENA 0x270
#define USB3_P0_MOD 0x280
#define USB3_P0_CON 0x288
#define USB3_P0_STA 0x28c
@@ -124,6 +127,9 @@
/* USB_INT_ENA_2 and USB_INT_STA_2 */
#define USB_INT_2_PIPE(n) BIT(n)
+/* USB_OTG_STA, USB_OTG_INT_STA and USB_OTG_INT_ENA */
+#define USB_OTG_IDMON BIT(4)
+
/* P0_MOD */
#define P0_MOD_DIR BIT(6)
@@ -362,10 +368,6 @@ static void usb3_init_axi_bridge(struct
static void usb3_init_epc_registers(struct renesas_usb3 *usb3)
{
- /* FIXME: How to change host / peripheral mode as well? */
- usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
- usb3_clear_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
-
usb3_write(usb3, ~0, USB3_USB_INT_STA_1);
usb3_enable_irq_1(usb3, USB_INT_1_VBUS_CNG);
}
@@ -538,11 +540,49 @@ static void usb3_check_vbus(struct renes
}
}
+static void usb3_set_mode(struct renesas_usb3 *usb3, bool host)
+{
+ if (host)
+ usb3_clear_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
+ else
+ usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
+}
+
+static void usb3_vbus_out(struct renesas_usb3 *usb3, bool enable)
+{
+ if (enable)
+ usb3_set_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
+ else
+ usb3_clear_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
+}
+
+static void usb3_mode_config(struct renesas_usb3 *usb3, bool host, bool a_dev)
+{
+ usb3_set_mode(usb3, host);
+ usb3_vbus_out(usb3, a_dev);
+}
+
+static bool usb3_is_a_device(struct renesas_usb3 *usb3)
+{
+ return !(usb3_read(usb3, USB3_USB_OTG_STA) & USB_OTG_IDMON);
+}
+
+static void usb3_check_id(struct renesas_usb3 *usb3)
+{
+ if (usb3_is_a_device(usb3))
+ usb3_mode_config(usb3, true, true);
+ else
+ usb3_mode_config(usb3, false, false);
+}
+
static void renesas_usb3_init_controller(struct renesas_usb3 *usb3)
{
usb3_init_axi_bridge(usb3);
usb3_init_epc_registers(usb3);
+ usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_STA);
+ usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_ENA);
+ usb3_check_id(usb3);
usb3_check_vbus(usb3);
}
@@ -551,6 +591,7 @@ static void renesas_usb3_stop_controller
usb3_disconnect(usb3);
usb3_write(usb3, 0, USB3_P0_INT_ENA);
usb3_write(usb3, 0, USB3_PN_INT_ENA);
+ usb3_write(usb3, 0, USB3_USB_OTG_INT_ENA);
usb3_write(usb3, 0, USB3_USB_INT_ENA_1);
usb3_write(usb3, 0, USB3_USB_INT_ENA_2);
usb3_write(usb3, 0, USB3_AXI_INT_ENA);
@@ -1509,10 +1550,22 @@ static void usb3_irq_epc_int_2(struct re
}
}
+static void usb3_irq_idmon_change(struct renesas_usb3 *usb3)
+{
+ usb3_check_id(usb3);
+}
+
+static void usb3_irq_otg_int(struct renesas_usb3 *usb3, u32 otg_int_sta)
+{
+ if (otg_int_sta & USB_OTG_IDMON)
+ usb3_irq_idmon_change(usb3);
+}
+
static void usb3_irq_epc(struct renesas_usb3 *usb3)
{
u32 int_sta_1 = usb3_read(usb3, USB3_USB_INT_STA_1);
u32 int_sta_2 = usb3_read(usb3, USB3_USB_INT_STA_2);
+ u32 otg_int_sta = usb3_read(usb3, USB3_USB_OTG_INT_STA);
int_sta_1 &= usb3_read(usb3, USB3_USB_INT_ENA_1);
if (int_sta_1) {
@@ -1523,6 +1576,12 @@ static void usb3_irq_epc(struct renesas_
int_sta_2 &= usb3_read(usb3, USB3_USB_INT_ENA_2);
if (int_sta_2)
usb3_irq_epc_int_2(usb3, int_sta_2);
+
+ otg_int_sta &= usb3_read(usb3, USB3_USB_OTG_INT_ENA);
+ if (otg_int_sta) {
+ usb3_write(usb3, otg_int_sta, USB3_USB_OTG_INT_STA);
+ usb3_irq_otg_int(usb3, otg_int_sta);
+ }
}
static irqreturn_t renesas_usb3_irq(int irq, void *_usb3)
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