usb: cdns3: Add support for DRD CDNSP

Patch adds support for Cadence DRD Super Speed Plus controller(CDNSP).
CDNSP DRD is a part of Cadence CDNSP controller.
The DRD CDNSP controller has a lot of difference on hardware level but on
software level is quite compatible with CDNS3 DRD. For this reason
CDNS3 DRD part of CDNS3 driver was reused for CDNSP driver.

Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Tested-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>

1 files changed, 55 insertions, 12 deletions

diff --git a/drivers/usb/cdns3/drd.h b/drivers/usb/cdns3/drd.h
index f1ccae285a16..a767b6893938 100644
--- a/drivers/usb/cdns3/drd.h
+++ b/drivers/usb/cdns3/drd.h
@@ -1,8 +1,8 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /*
- * Cadence USB3 DRD header file.
+ * Cadence USB3 and USBSSP DRD header file.
  *
- * Copyright (C) 2018-2019 Cadence.
+ * Copyright (C) 2018-2020 Cadence.
  *
  * Author: Pawel Laszczak <pawell@cadence.com>
  */
@@ -13,7 +13,7 @@
 #include <linux/phy/phy.h>
 #include "core.h"
 
-/*  DRD register interface for version v1. */
+/*  DRD register interface for version v1 of cdns3 driver. */
 struct cdns3_otg_regs {
 	__le32 did;
 	__le32 rid;
@@ -38,7 +38,7 @@ struct cdns3_otg_regs {
 	__le32 ctrl2;
 };
 
-/*  DRD register interface for version v0. */
+/*  DRD register interface for version v0 of cdns3 driver. */
 struct cdns3_otg_legacy_regs {
 	__le32 cmd;
 	__le32 sts;
@@ -57,14 +57,45 @@ struct cdns3_otg_legacy_regs {
 	__le32 ctrl1;
 };
 
+/* DRD register interface for cdnsp driver */
+struct cdnsp_otg_regs {
+	__le32 did;
+	__le32 rid;
+	__le32 cfgs1;
+	__le32 cfgs2;
+	__le32 cmd;
+	__le32 sts;
+	__le32 state;
+	__le32 ien;
+	__le32 ivect;
+	__le32 tmr;
+	__le32 simulate;
+	__le32 adpbc_sts;
+	__le32 adp_ramp_time;
+	__le32 adpbc_ctrl1;
+	__le32 adpbc_ctrl2;
+	__le32 override;
+	__le32 vbusvalid_dbnc_cfg;
+	__le32 sessvalid_dbnc_cfg;
+	__le32 susp_timing_ctrl;
+};
+
+#define OTG_CDNSP_DID	0x0004034E
+
 /*
- * Common registers interface for both version of DRD.
+ * Common registers interface for both CDNS3 and CDNSP version of DRD.
  */
 struct cdns3_otg_common_regs {
 	__le32 cmd;
 	__le32 sts;
 	__le32 state;
-	__le32 different1;
+};
+
+/*
+ * Interrupt related registers. This registers are mapped in different
+ * location for CDNSP controller.
+ */
+struct cdns3_otg_irq_regs {
 	__le32 ien;
 	__le32 ivect;
 };
@@ -92,9 +123,9 @@ struct cdns3_otg_common_regs {
 #define OTGCMD_DEV_BUS_DROP		BIT(8)
 /* Drop the bus for Host mode*/
 #define OTGCMD_HOST_BUS_DROP		BIT(9)
-/* Power Down USBSS-DEV. */
+/* Power Down USBSS-DEV - only for CDNS3.*/
 #define OTGCMD_DEV_POWER_OFF		BIT(11)
-/* Power Down CDNSXHCI. */
+/* Power Down CDNSXHCI - only for CDNS3. */
 #define OTGCMD_HOST_POWER_OFF		BIT(12)
 
 /* OTGIEN - bitmasks */
@@ -123,20 +154,31 @@ struct cdns3_otg_common_regs {
 #define OTGSTS_OTG_NRDY_MASK		BIT(11)
 #define OTGSTS_OTG_NRDY(p)		((p) & OTGSTS_OTG_NRDY_MASK)
 /*
- * Value of the strap pins.
+ * Value of the strap pins for:
+ * CDNS3:
  * 000 - no default configuration
  * 010 - Controller initiall configured as Host
  * 100 - Controller initially configured as Device
+ * CDNSP:
+ * 000 - No default configuration.
+ * 010 - Controller initiall configured as Host.
+ * 100 - Controller initially configured as Device.
  */
 #define OTGSTS_STRAP(p)			(((p) & GENMASK(14, 12)) >> 12)
 #define OTGSTS_STRAP_NO_DEFAULT_CFG	0x00
 #define OTGSTS_STRAP_HOST_OTG		0x01
 #define OTGSTS_STRAP_HOST		0x02
 #define OTGSTS_STRAP_GADGET		0x04
+#define OTGSTS_CDNSP_STRAP_HOST		0x01
+#define OTGSTS_CDNSP_STRAP_GADGET	0x02
+
 /* Host mode is turned on. */
-#define OTGSTS_XHCI_READY		BIT(26)
+#define OTGSTS_CDNS3_XHCI_READY		BIT(26)
+#define OTGSTS_CDNSP_XHCI_READY		BIT(27)
+
 /* "Device mode is turned on .*/
-#define OTGSTS_DEV_READY		BIT(27)
+#define OTGSTS_CDNS3_DEV_READY		BIT(27)
+#define OTGSTS_CDNSP_DEV_READY		BIT(26)
 
 /* OTGSTATE- bitmasks */
 #define OTGSTATE_DEV_STATE_MASK		GENMASK(2, 0)
@@ -152,6 +194,8 @@ struct cdns3_otg_common_regs {
 #define OVERRIDE_IDPULLUP		BIT(0)
 /* Only for CDNS3_CONTROLLER_V0 version */
 #define OVERRIDE_IDPULLUP_V0		BIT(24)
+/* Vbusvalid/Sesvalid override select. */
+#define OVERRIDE_SESS_VLD_SEL		BIT(10)
 
 /* PHYRST_CFG - bitmasks */
 #define PHYRST_CFG_PHYRST_A_ENABLE     BIT(0)
@@ -170,6 +214,5 @@ int cdns3_drd_gadget_on(struct cdns3 *cdns);
 void cdns3_drd_gadget_off(struct cdns3 *cdns);
 int cdns3_drd_host_on(struct cdns3 *cdns);
 void cdns3_drd_host_off(struct cdns3 *cdns);
-int cdns3_set_mode(struct cdns3 *cdns, enum usb_dr_mode mode);
 
 #endif /* __LINUX_CDNS3_DRD */