usb: phytium: Add support for Phytium USB controller

Documentation/devicetree/bindings/usb/phytium,usb2.yaml

@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/phytium,usb2.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Phytium USBHS-DRD controller bindings
+
+maintainers:
+  - Chen Baozi <[email protected]>
+
+properties:
+  compatible:
+    const: phytium,usb2
+
+  reg:
+    items:
+      - description: USB controller registers
+      - description: PHY registers
+
+  interrupts:
+    maxItems: 1
+
+  dr_mode:
+    enum: [host, otg, peripheral]
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    usb2_0: usb2@31800000 {
+      compatible = "phytium,usb2";
+      reg = <0x0 0x31800000 0x0 0x80000>,
+            <0x0 0x31990000 0x0 0x10000>;
+      interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
+    };

drivers/usb/Kconfig

@@ -129,6 +129,8 @@ source "drivers/usb/chipidea/Kconfig"
 
 source "drivers/usb/isp1760/Kconfig"
 
+source "drivers/usb/phytium/Kconfig"
+
 comment "USB port drivers"
 
 if USB

drivers/usb/Makefile

@@ -18,6 +18,7 @@ obj-$(CONFIG_USB_CDNS3)		+= cdns3/
 obj-$(CONFIG_USB_CDNSP_PCI)	+= cdns3/
 
 obj-$(CONFIG_USB_FOTG210)	+= fotg210/
+obj-$(CONFIG_USB_PHYTIUM)	+= phytium/
 
 obj-$(CONFIG_USB_MON)		+= mon/
 obj-$(CONFIG_USB_MTU3)		+= mtu3/

drivers/usb/phytium/Kconfig

@@ -0,0 +1,22 @@
+config USB_PHYTIUM
+	tristate "PHYTIUM USB Support"
+	depends on USB
+	depends on USB_GADGET
+	help
+	  Say Y or M here if your system has a OTG USB Controller based on PHYTIUM SOC.
+	  like Pe220x.
+
+	  If you choose to build this driver is a dynamically linked modules, the module will
+	  be called phytium-usb.ko
+
+config USB_PHYTIUM_PCI
+	tristate "PHYTIUM PCI USB Support"
+	default n
+	depends on USB
+	depends on USB_GADGET
+	help
+	  Say Y or M here if your system has a OTG USB Controller based on PHYTIUM SOC.
+	  like Pe220x.
+
+	  If you choose to build this driver is a dynamically linked modules, the module will
+	  be called phytium-usb.ko

drivers/usb/phytium/Makefile

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_USB_PHYTIUM) += phytium-usb.o
+obj-$(CONFIG_USB_PHYTIUM_PCI) += phytium-usb-pci.o
+
+phytium-usb-y := core.o dma.o platform.o host.o gadget.o
+phytium-usb-pci-y := core.o dma.o pci.o host.o gadget.o

drivers/usb/phytium/core.c

@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include "core.h"
+
+int phytium_core_reset(struct phytium_cusb *config, bool skip_wait)
+{
+	if (!config)
+		return 0;
+
+	spin_lock_init(&config->lock);
+
+	return 0;
+}
+
+uint32_t phytium_read32(uint32_t *address)
+{
+	return readl(address);
+}
+
+void phytium_write32(uint32_t *address, uint32_t value)
+{
+	writel(value, address);
+}
+
+uint16_t phytium_read16(uint16_t *address)
+{
+	return readw(address);
+}
+
+void phytium_write16(uint16_t *address, uint16_t value)
+{
+	writew(value, address);
+}
+
+uint8_t phytium_read8(uint8_t *address)
+{
+	return readb(address);
+}
+
+void phytium_write8(uint8_t *address, uint8_t value)
+{
+	writeb(value, address);
+}
+

drivers/usb/phytium/core.h

@@ -0,0 +1,98 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __PHYTIUM_CORE_H__
+#define __PHYTIUM_CORE_H__
+
+#include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
+#include "host_api.h"
+#include "gadget.h"
+
+#define MAX_EPS_CHANNELS	16
+
+struct phytium_ep {
+	struct phytium_cusb	*config;
+	u16			max_packet;
+	u8			ep_num;
+	struct GADGET_EP	*gadget_ep;
+	struct list_head	req_list;
+	struct usb_ep		end_point;
+	char			name[12];
+	u8 is_tx;
+	const struct usb_endpoint_descriptor	*desc;
+	u8			busy;
+};
+
+struct phytium_request {
+	struct usb_request request;
+	struct GADGET_REQ	*gadget_request;
+	struct list_head	list;
+	struct phytium_ep	*ep;
+	struct phytium_cusb	*config;
+	u8			is_tx;
+	u8			epnum;
+};
+
+struct phytium_cusb {
+	struct device		*dev;
+	void __iomem		*regs;
+	void __iomem		*phy_regs;
+	int			irq;
+	spinlock_t		lock;
+	enum usb_dr_mode	dr_mode;
+
+	struct GADGET_OBJ	*gadget_obj;
+	struct GADGET_CFG	gadget_cfg;
+	struct GADGET_CALLBACKS gadget_callbacks;
+	struct GADGET_SYSREQ	gadget_sysreq;
+	struct GADGET_DEV	*gadget_dev;
+	void			*gadget_priv;
+
+	struct usb_gadget	gadget;
+	struct usb_gadget_driver *gadget_driver;
+	struct phytium_ep	endpoints_tx[MAX_EPS_CHANNELS];
+	struct phytium_ep	endpoints_rx[MAX_EPS_CHANNELS];
+	u8			ep0_data_stage_is_tx;
+
+	struct HOST_OBJ		*host_obj;
+	struct HOST_CFG		host_cfg;
+	struct HOST_CALLBACKS	host_callbacks;
+	struct HOST_SYSREQ	host_sysreq;
+	void			*host_priv;
+	struct usb_hcd          *hcd;
+
+	struct DMA_OBJ		*dma_obj;
+	struct DMA_CFG		dma_cfg;
+	struct DMA_CALLBACKS	dma_callbacks;
+	struct DMA_SYSREQ	dma_sysreq;
+	bool	isVhubHost;
+};
+
+int phytium_core_reset(struct phytium_cusb *config, bool skip_wait);
+
+int phytium_host_init(struct phytium_cusb *config);
+int phytium_host_uninit(struct phytium_cusb *config);
+
+#ifdef CONFIG_PM
+int phytium_host_resume(void *priv);
+int phytium_host_suspend(void *priv);
+int phytium_gadget_resume(void *priv);
+int phytium_gadget_suspend(void *priv);
+#endif
+
+int phytium_gadget_init(struct phytium_cusb *config);
+int phytium_gadget_uninit(struct phytium_cusb *config);
+
+uint32_t phytium_read32(uint32_t *address);
+
+void phytium_write32(uint32_t *address, uint32_t value);
+
+uint16_t phytium_read16(uint16_t *address);
+
+void phytium_write16(uint16_t *address, uint16_t value);
+
+uint8_t phytium_read8(uint8_t *address);
+
+void phytium_write8(uint8_t *address, uint8_t value);
+
+#endif