drivers/usb/gadget/udc/atmel_usba_udc.h - linux/torvalds/linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Driver for the Atmel USBA high speed USB device controller
  *
  * Copyright (C) 2005-2007 Atmel Corporation
  */
 #ifndef __LINUX_USB_GADGET_USBA_UDC_H__
 #define __LINUX_USB_GADGET_USBA_UDC_H__

 #include <linux/gpio/consumer.h>

 /* USB register offsets */
 #define USBA_CTRL				0x0000
 #define USBA_FNUM				0x0004
 #define USBA_INT_ENB				0x0010
 #define USBA_INT_STA				0x0014
 #define USBA_INT_CLR				0x0018
 #define USBA_EPT_RST				0x001c
 #define USBA_TST				0x00e0

 /* USB endpoint register offsets */
 #define USBA_EPT_CFG				0x0000
 #define USBA_EPT_CTL_ENB			0x0004
 #define USBA_EPT_CTL_DIS			0x0008
 #define USBA_EPT_CTL				0x000c
 #define USBA_EPT_SET_STA			0x0014
 #define USBA_EPT_CLR_STA			0x0018
 #define USBA_EPT_STA				0x001c

 /* USB DMA register offsets */
 #define USBA_DMA_NXT_DSC			0x0000
 #define USBA_DMA_ADDRESS			0x0004
 #define USBA_DMA_CONTROL			0x0008
 #define USBA_DMA_STATUS				0x000c

 /* Bitfields in CTRL */
 #define USBA_DEV_ADDR_OFFSET			0
 #define USBA_DEV_ADDR_SIZE			7
 #define USBA_FADDR_EN				(1 <<  7)
 #define USBA_EN_USBA				(1 <<  8)
 #define USBA_DETACH				(1 <<  9)
 #define USBA_REMOTE_WAKE_UP			(1 << 10)
 #define USBA_PULLD_DIS				(1 << 11)

 #define USBA_ENABLE_MASK			(USBA_EN_USBA | USBA_PULLD_DIS)
 #define USBA_DISABLE_MASK			USBA_DETACH

 /* Bitfields in FNUM */
 #define USBA_MICRO_FRAME_NUM_OFFSET		0
 #define USBA_MICRO_FRAME_NUM_SIZE		3
 #define USBA_FRAME_NUMBER_OFFSET		3
 #define USBA_FRAME_NUMBER_SIZE			11
 #define USBA_FRAME_NUM_ERROR			(1 << 31)

 /* Bitfields in INT_ENB/INT_STA/INT_CLR */
 #define USBA_HIGH_SPEED				(1 <<  0)
 #define USBA_DET_SUSPEND			(1 <<  1)
 #define USBA_MICRO_SOF				(1 <<  2)
 #define USBA_SOF				(1 <<  3)
 #define USBA_END_OF_RESET			(1 <<  4)
 #define USBA_WAKE_UP				(1 <<  5)
 #define USBA_END_OF_RESUME			(1 <<  6)
 #define USBA_UPSTREAM_RESUME			(1 <<  7)
 #define USBA_EPT_INT_OFFSET			8
 #define USBA_EPT_INT_SIZE			16
 #define USBA_DMA_INT_OFFSET			24
 #define USBA_DMA_INT_SIZE			8

 /* Bitfields in EPT_RST */
 #define USBA_RST_OFFSET				0
 #define USBA_RST_SIZE				16

 /* Bitfields in USBA_TST */
 #define USBA_SPEED_CFG_OFFSET			0
 #define USBA_SPEED_CFG_SIZE			2
 #define USBA_TST_J_MODE				(1 <<  2)
 #define USBA_TST_K_MODE				(1 <<  3)
 #define USBA_TST_PKT_MODE			(1 <<  4)
 #define USBA_OPMODE2				(1 <<  5)

 /* Bitfields in EPT_CFG */
 #define USBA_EPT_SIZE_OFFSET			0
 #define USBA_EPT_SIZE_SIZE			3
 #define USBA_EPT_DIR_IN				(1 <<  3)
 #define USBA_EPT_TYPE_OFFSET			4
 #define USBA_EPT_TYPE_SIZE			2
 #define USBA_BK_NUMBER_OFFSET			6
 #define USBA_BK_NUMBER_SIZE			2
 #define USBA_NB_TRANS_OFFSET			8
 #define USBA_NB_TRANS_SIZE			2
 #define USBA_EPT_MAPPED				(1 << 31)

 /* Bitfields in EPT_CTL/EPT_CTL_ENB/EPT_CTL_DIS */
 #define USBA_EPT_ENABLE				(1 <<  0)
 #define USBA_AUTO_VALID				(1 <<  1)
 #define USBA_INTDIS_DMA				(1 <<  3)
 #define USBA_NYET_DIS				(1 <<  4)
 #define USBA_DATAX_RX				(1 <<  6)
 #define USBA_MDATA_RX				(1 <<  7)
 /* Bits 8-15 and 31 enable interrupts for respective bits in EPT_STA */
 #define USBA_BUSY_BANK_IE			(1 << 18)

 /* Bitfields in EPT_SET_STA/EPT_CLR_STA/EPT_STA */
 #define USBA_FORCE_STALL			(1 <<  5)
 #define USBA_TOGGLE_CLR				(1 <<  6)
 #define USBA_TOGGLE_SEQ_OFFSET			6
 #define USBA_TOGGLE_SEQ_SIZE			2
 #define USBA_ERR_OVFLW				(1 <<  8)
 #define USBA_RX_BK_RDY				(1 <<  9)
 #define USBA_KILL_BANK				(1 <<  9)
 #define USBA_TX_COMPLETE			(1 << 10)
 #define USBA_TX_PK_RDY				(1 << 11)
 #define USBA_ISO_ERR_TRANS			(1 << 11)
 #define USBA_RX_SETUP				(1 << 12)
 #define USBA_ISO_ERR_FLOW			(1 << 12)
 #define USBA_STALL_SENT				(1 << 13)
 #define USBA_ISO_ERR_CRC			(1 << 13)
 #define USBA_ISO_ERR_NBTRANS			(1 << 13)
 #define USBA_NAK_IN				(1 << 14)
 #define USBA_ISO_ERR_FLUSH			(1 << 14)
 #define USBA_NAK_OUT				(1 << 15)
 #define USBA_CURRENT_BANK_OFFSET		16
 #define USBA_CURRENT_BANK_SIZE			2
 #define USBA_BUSY_BANKS_OFFSET			18
 #define USBA_BUSY_BANKS_SIZE			2
 #define USBA_BYTE_COUNT_OFFSET			20
 #define USBA_BYTE_COUNT_SIZE			11
 #define USBA_SHORT_PACKET			(1 << 31)

 /* Bitfields in DMA_CONTROL */
 #define USBA_DMA_CH_EN				(1 <<  0)
 #define USBA_DMA_LINK				(1 <<  1)
 #define USBA_DMA_END_TR_EN			(1 <<  2)
 #define USBA_DMA_END_BUF_EN			(1 <<  3)
 #define USBA_DMA_END_TR_IE			(1 <<  4)
 #define USBA_DMA_END_BUF_IE			(1 <<  5)
 #define USBA_DMA_DESC_LOAD_IE			(1 <<  6)
 #define USBA_DMA_BURST_LOCK			(1 <<  7)
 #define USBA_DMA_BUF_LEN_OFFSET			16
 #define USBA_DMA_BUF_LEN_SIZE			16

 /* Bitfields in DMA_STATUS */
 #define USBA_DMA_CH_ACTIVE			(1 <<  1)
 #define USBA_DMA_END_TR_ST			(1 <<  4)
 #define USBA_DMA_END_BUF_ST			(1 <<  5)
 #define USBA_DMA_DESC_LOAD_ST			(1 <<  6)

 /* Constants for SPEED_CFG */
 #define USBA_SPEED_CFG_NORMAL			0
 #define USBA_SPEED_CFG_FORCE_HIGH		2
 #define USBA_SPEED_CFG_FORCE_FULL		3

 /* Constants for EPT_SIZE */
 #define USBA_EPT_SIZE_8				0
 #define USBA_EPT_SIZE_16			1
 #define USBA_EPT_SIZE_32			2
 #define USBA_EPT_SIZE_64			3
 #define USBA_EPT_SIZE_128			4
 #define USBA_EPT_SIZE_256			5
 #define USBA_EPT_SIZE_512			6
 #define USBA_EPT_SIZE_1024			7

 /* Constants for EPT_TYPE */
 #define USBA_EPT_TYPE_CONTROL			0
 #define USBA_EPT_TYPE_ISO			1
 #define USBA_EPT_TYPE_BULK			2
 #define USBA_EPT_TYPE_INT			3

 /* Constants for BK_NUMBER */
 #define USBA_BK_NUMBER_ZERO			0
 #define USBA_BK_NUMBER_ONE			1
 #define USBA_BK_NUMBER_DOUBLE			2
 #define USBA_BK_NUMBER_TRIPLE			3

 /* Bit manipulation macros */
 #define USBA_BF(name, value)					\
 	(((value) & ((1 << USBA_##name##_SIZE) - 1))		\
 	 << USBA_##name##_OFFSET)
 #define USBA_BFEXT(name, value)					\
 	(((value) >> USBA_##name##_OFFSET)			\
 	 & ((1 << USBA_##name##_SIZE) - 1))
 #define USBA_BFINS(name, value, old)				\
 	(((old) & ~(((1 << USBA_##name##_SIZE) - 1)		\
 		    << USBA_##name##_OFFSET))			\
 	 | USBA_BF(name, value))

 /* Register access macros */
 #define usba_readl(udc, reg)					\
 	readl_relaxed((udc)->regs + USBA_##reg)
 #define usba_writel(udc, reg, value)				\
 	writel_relaxed((value), (udc)->regs + USBA_##reg)
 #define usba_ep_readl(ep, reg)					\
 	readl_relaxed((ep)->ep_regs + USBA_EPT_##reg)
 #define usba_ep_writel(ep, reg, value)				\
 	writel_relaxed((value), (ep)->ep_regs + USBA_EPT_##reg)
 #define usba_dma_readl(ep, reg)					\
 	readl_relaxed((ep)->dma_regs + USBA_DMA_##reg)
 #define usba_dma_writel(ep, reg, value)				\
 	writel_relaxed((value), (ep)->dma_regs + USBA_DMA_##reg)

 /* Calculate base address for a given endpoint or DMA controller */
 #define USBA_EPT_BASE(x)	(0x100 + (x) * 0x20)
 #define USBA_DMA_BASE(x)	(0x300 + (x) * 0x10)
 #define USBA_FIFO_BASE(x)	((x) << 16)

 /* Synth parameters */
 #define USBA_NR_DMAS		7

 #define EP0_FIFO_SIZE		64
 #define EP0_EPT_SIZE		USBA_EPT_SIZE_64
 #define EP0_NR_BANKS		1

 #define FIFO_IOMEM_ID	0
 #define CTRL_IOMEM_ID	1

 #define DBG_ERR		0x0001	/* report all error returns */
 #define DBG_HW		0x0002	/* debug hardware initialization */
 #define DBG_GADGET	0x0004	/* calls to/from gadget driver */
 #define DBG_INT		0x0008	/* interrupts */
 #define DBG_BUS		0x0010	/* report changes in bus state */
 #define DBG_QUEUE	0x0020  /* debug request queue processing */
 #define DBG_FIFO	0x0040  /* debug FIFO contents */
 #define DBG_DMA		0x0080  /* debug DMA handling */
 #define DBG_REQ		0x0100	/* print out queued request length */
 #define DBG_ALL		0xffff
 #define DBG_NONE	0x0000

 #define DEBUG_LEVEL	(DBG_ERR)

 #define DBG(level, fmt, ...)					\
 	do {							\
 		if ((level) & DEBUG_LEVEL)			\
 			pr_debug("udc: " fmt, ## __VA_ARGS__);	\
 	} while (0)

 enum usba_ctrl_state {
 	WAIT_FOR_SETUP,
 	DATA_STAGE_IN,
 	DATA_STAGE_OUT,
 	STATUS_STAGE_IN,
 	STATUS_STAGE_OUT,
 	STATUS_STAGE_ADDR,
 	STATUS_STAGE_TEST,
 };
 /*
   EP_STATE_IDLE,
   EP_STATE_SETUP,
   EP_STATE_IN_DATA,
   EP_STATE_OUT_DATA,
   EP_STATE_SET_ADDR_STATUS,
   EP_STATE_RX_STATUS,
   EP_STATE_TX_STATUS,
   EP_STATE_HALT,
 */

 struct usba_dma_desc {
 	dma_addr_t next;
 	dma_addr_t addr;
 	u32 ctrl;
 };

 struct usba_fifo_cfg {
 	u8			hw_ep_num;
 	u16			fifo_size;
 	u8			nr_banks;
 };

 struct usba_ep {
 	int					state;
 	void __iomem				*ep_regs;
 	void __iomem				*dma_regs;
 	void __iomem				*fifo;
 	char					name[8];
 	struct usb_ep				ep;
 	struct usba_udc				*udc;

 	struct list_head			queue;

 	u16					fifo_size;
 	u8					nr_banks;
 	u8					index;
 	unsigned int				can_dma:1;
 	unsigned int				can_isoc:1;
 	unsigned int				is_isoc:1;
 	unsigned int				is_in:1;
 	unsigned long				ept_cfg;
 #ifdef CONFIG_USB_GADGET_DEBUG_FS
 	u32					last_dma_status;
 	struct dentry				*debugfs_dir;
 #endif
 };

 struct usba_ep_config {
 	u8					nr_banks;
 	unsigned int				can_dma:1;
 	unsigned int				can_isoc:1;
 };

 struct usba_request {
 	struct usb_request			req;
 	struct list_head			queue;

 	u32					ctrl;

 	unsigned int				submitted:1;
 	unsigned int				last_transaction:1;
 	unsigned int				using_dma:1;
 	unsigned int				mapped:1;
 };

 struct usba_udc_errata {
 	void (*toggle_bias)(struct usba_udc *udc, int is_on);
 	void (*pulse_bias)(struct usba_udc *udc);
 };

 struct usba_udc_config {
 	const struct usba_udc_errata *errata;
 	const struct usba_ep_config *config;
 	const int num_ep;
 	const bool ep_prealloc;
 };

 struct usba_udc {
 	/* Protect hw registers from concurrent modifications */
 	spinlock_t lock;

 	/* Mutex to prevent concurrent start or stop */
 	struct mutex vbus_mutex;

 	void __iomem *regs;
 	void __iomem *fifo;

 	struct usb_gadget gadget;
 	struct usb_gadget_driver *driver;
 	struct platform_device *pdev;
 	const struct usba_udc_errata *errata;
 	int irq;
 	struct gpio_desc *vbus_pin;
 	int num_ep;
 	struct usba_fifo_cfg *fifo_cfg;
 	struct clk *pclk;
 	struct clk *hclk;
 	struct usba_ep *usba_ep;
 	bool bias_pulse_needed;
 	bool clocked;
 	bool suspended;
 	bool ep_prealloc;

 	u16 devstatus;

 	u16 test_mode;
 	int vbus_prev;

 	u32 int_enb_cache;

 #ifdef CONFIG_USB_GADGET_DEBUG_FS
 	struct dentry *debugfs_root;
 #endif

 	struct regmap *pmc;
 };

 static inline struct usba_ep *to_usba_ep(struct usb_ep *ep)
 {
 	return container_of(ep, struct usba_ep, ep);
 }

 static inline struct usba_request *to_usba_req(struct usb_request *req)
 {
 	return container_of(req, struct usba_request, req);
 }

 static inline struct usba_udc *to_usba_udc(struct usb_gadget *gadget)
 {
 	return container_of(gadget, struct usba_udc, gadget);
 }

 #define ep_is_control(ep)	((ep)->index == 0)
 #define ep_is_idle(ep)		((ep)->state == EP_STATE_IDLE)

 #endif /* __LINUX_USB_GADGET_USBA_UDC_H */
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Driver for the Atmel USBA high speed USB device controller
	*
	* Copyright (C) 2005-2007 Atmel Corporation
	*/
	#ifndef __LINUX_USB_GADGET_USBA_UDC_H__
	#define __LINUX_USB_GADGET_USBA_UDC_H__

	#include <linux/gpio/consumer.h>

	/* USB register offsets */
	#define USBA_CTRL 0x0000
	#define USBA_FNUM 0x0004
	#define USBA_INT_ENB 0x0010
	#define USBA_INT_STA 0x0014
	#define USBA_INT_CLR 0x0018
	#define USBA_EPT_RST 0x001c
	#define USBA_TST 0x00e0

	/* USB endpoint register offsets */
	#define USBA_EPT_CFG 0x0000
	#define USBA_EPT_CTL_ENB 0x0004
	#define USBA_EPT_CTL_DIS 0x0008
	#define USBA_EPT_CTL 0x000c
	#define USBA_EPT_SET_STA 0x0014
	#define USBA_EPT_CLR_STA 0x0018
	#define USBA_EPT_STA 0x001c

	/* USB DMA register offsets */
	#define USBA_DMA_NXT_DSC 0x0000
	#define USBA_DMA_ADDRESS 0x0004
	#define USBA_DMA_CONTROL 0x0008
	#define USBA_DMA_STATUS 0x000c

	/* Bitfields in CTRL */
	#define USBA_DEV_ADDR_OFFSET 0
	#define USBA_DEV_ADDR_SIZE 7
	#define USBA_FADDR_EN (1 << 7)
	#define USBA_EN_USBA (1 << 8)
	#define USBA_DETACH (1 << 9)
	#define USBA_REMOTE_WAKE_UP (1 << 10)
	#define USBA_PULLD_DIS (1 << 11)

	#define USBA_ENABLE_MASK (USBA_EN_USBA \| USBA_PULLD_DIS)
	#define USBA_DISABLE_MASK USBA_DETACH

	/* Bitfields in FNUM */
	#define USBA_MICRO_FRAME_NUM_OFFSET 0
	#define USBA_MICRO_FRAME_NUM_SIZE 3
	#define USBA_FRAME_NUMBER_OFFSET 3
	#define USBA_FRAME_NUMBER_SIZE 11
	#define USBA_FRAME_NUM_ERROR (1 << 31)

	/* Bitfields in INT_ENB/INT_STA/INT_CLR */
	#define USBA_HIGH_SPEED (1 << 0)
	#define USBA_DET_SUSPEND (1 << 1)
	#define USBA_MICRO_SOF (1 << 2)
	#define USBA_SOF (1 << 3)
	#define USBA_END_OF_RESET (1 << 4)
	#define USBA_WAKE_UP (1 << 5)
	#define USBA_END_OF_RESUME (1 << 6)
	#define USBA_UPSTREAM_RESUME (1 << 7)
	#define USBA_EPT_INT_OFFSET 8
	#define USBA_EPT_INT_SIZE 16
	#define USBA_DMA_INT_OFFSET 24
	#define USBA_DMA_INT_SIZE 8

	/* Bitfields in EPT_RST */
	#define USBA_RST_OFFSET 0
	#define USBA_RST_SIZE 16

	/* Bitfields in USBA_TST */
	#define USBA_SPEED_CFG_OFFSET 0
	#define USBA_SPEED_CFG_SIZE 2
	#define USBA_TST_J_MODE (1 << 2)
	#define USBA_TST_K_MODE (1 << 3)
	#define USBA_TST_PKT_MODE (1 << 4)
	#define USBA_OPMODE2 (1 << 5)

	/* Bitfields in EPT_CFG */
	#define USBA_EPT_SIZE_OFFSET 0
	#define USBA_EPT_SIZE_SIZE 3
	#define USBA_EPT_DIR_IN (1 << 3)
	#define USBA_EPT_TYPE_OFFSET 4
	#define USBA_EPT_TYPE_SIZE 2
	#define USBA_BK_NUMBER_OFFSET 6
	#define USBA_BK_NUMBER_SIZE 2
	#define USBA_NB_TRANS_OFFSET 8
	#define USBA_NB_TRANS_SIZE 2
	#define USBA_EPT_MAPPED (1 << 31)

	/* Bitfields in EPT_CTL/EPT_CTL_ENB/EPT_CTL_DIS */
	#define USBA_EPT_ENABLE (1 << 0)
	#define USBA_AUTO_VALID (1 << 1)
	#define USBA_INTDIS_DMA (1 << 3)
	#define USBA_NYET_DIS (1 << 4)
	#define USBA_DATAX_RX (1 << 6)
	#define USBA_MDATA_RX (1 << 7)
	/* Bits 8-15 and 31 enable interrupts for respective bits in EPT_STA */
	#define USBA_BUSY_BANK_IE (1 << 18)

	/* Bitfields in EPT_SET_STA/EPT_CLR_STA/EPT_STA */
	#define USBA_FORCE_STALL (1 << 5)
	#define USBA_TOGGLE_CLR (1 << 6)
	#define USBA_TOGGLE_SEQ_OFFSET 6
	#define USBA_TOGGLE_SEQ_SIZE 2
	#define USBA_ERR_OVFLW (1 << 8)
	#define USBA_RX_BK_RDY (1 << 9)
	#define USBA_KILL_BANK (1 << 9)
	#define USBA_TX_COMPLETE (1 << 10)
	#define USBA_TX_PK_RDY (1 << 11)
	#define USBA_ISO_ERR_TRANS (1 << 11)
	#define USBA_RX_SETUP (1 << 12)
	#define USBA_ISO_ERR_FLOW (1 << 12)
	#define USBA_STALL_SENT (1 << 13)
	#define USBA_ISO_ERR_CRC (1 << 13)
	#define USBA_ISO_ERR_NBTRANS (1 << 13)
	#define USBA_NAK_IN (1 << 14)
	#define USBA_ISO_ERR_FLUSH (1 << 14)
	#define USBA_NAK_OUT (1 << 15)
	#define USBA_CURRENT_BANK_OFFSET 16
	#define USBA_CURRENT_BANK_SIZE 2
	#define USBA_BUSY_BANKS_OFFSET 18
	#define USBA_BUSY_BANKS_SIZE 2
	#define USBA_BYTE_COUNT_OFFSET 20
	#define USBA_BYTE_COUNT_SIZE 11
	#define USBA_SHORT_PACKET (1 << 31)

	/* Bitfields in DMA_CONTROL */
	#define USBA_DMA_CH_EN (1 << 0)
	#define USBA_DMA_LINK (1 << 1)
	#define USBA_DMA_END_TR_EN (1 << 2)
	#define USBA_DMA_END_BUF_EN (1 << 3)
	#define USBA_DMA_END_TR_IE (1 << 4)
	#define USBA_DMA_END_BUF_IE (1 << 5)
	#define USBA_DMA_DESC_LOAD_IE (1 << 6)
	#define USBA_DMA_BURST_LOCK (1 << 7)
	#define USBA_DMA_BUF_LEN_OFFSET 16
	#define USBA_DMA_BUF_LEN_SIZE 16

	/* Bitfields in DMA_STATUS */
	#define USBA_DMA_CH_ACTIVE (1 << 1)
	#define USBA_DMA_END_TR_ST (1 << 4)
	#define USBA_DMA_END_BUF_ST (1 << 5)
	#define USBA_DMA_DESC_LOAD_ST (1 << 6)

	/* Constants for SPEED_CFG */
	#define USBA_SPEED_CFG_NORMAL 0
	#define USBA_SPEED_CFG_FORCE_HIGH 2
	#define USBA_SPEED_CFG_FORCE_FULL 3

	/* Constants for EPT_SIZE */
	#define USBA_EPT_SIZE_8 0
	#define USBA_EPT_SIZE_16 1
	#define USBA_EPT_SIZE_32 2
	#define USBA_EPT_SIZE_64 3
	#define USBA_EPT_SIZE_128 4
	#define USBA_EPT_SIZE_256 5
	#define USBA_EPT_SIZE_512 6
	#define USBA_EPT_SIZE_1024 7

	/* Constants for EPT_TYPE */
	#define USBA_EPT_TYPE_CONTROL 0
	#define USBA_EPT_TYPE_ISO 1
	#define USBA_EPT_TYPE_BULK 2
	#define USBA_EPT_TYPE_INT 3

	/* Constants for BK_NUMBER */
	#define USBA_BK_NUMBER_ZERO 0
	#define USBA_BK_NUMBER_ONE 1
	#define USBA_BK_NUMBER_DOUBLE 2
	#define USBA_BK_NUMBER_TRIPLE 3

	/* Bit manipulation macros */
	#define USBA_BF(name, value) \
	(((value) & ((1 << USBA_##name##_SIZE) - 1)) \
	<< USBA_##name##_OFFSET)
	#define USBA_BFEXT(name, value) \
	(((value) >> USBA_##name##_OFFSET) \
	& ((1 << USBA_##name##_SIZE) - 1))
	#define USBA_BFINS(name, value, old) \
	(((old) & ~(((1 << USBA_##name##_SIZE) - 1) \
	<< USBA_##name##_OFFSET)) \
	\| USBA_BF(name, value))

	/* Register access macros */
	#define usba_readl(udc, reg) \
	readl_relaxed((udc)->regs + USBA_##reg)
	#define usba_writel(udc, reg, value) \
	writel_relaxed((value), (udc)->regs + USBA_##reg)
	#define usba_ep_readl(ep, reg) \
	readl_relaxed((ep)->ep_regs + USBA_EPT_##reg)
	#define usba_ep_writel(ep, reg, value) \
	writel_relaxed((value), (ep)->ep_regs + USBA_EPT_##reg)
	#define usba_dma_readl(ep, reg) \
	readl_relaxed((ep)->dma_regs + USBA_DMA_##reg)
	#define usba_dma_writel(ep, reg, value) \
	writel_relaxed((value), (ep)->dma_regs + USBA_DMA_##reg)

	/* Calculate base address for a given endpoint or DMA controller */
	#define USBA_EPT_BASE(x) (0x100 + (x) * 0x20)
	#define USBA_DMA_BASE(x) (0x300 + (x) * 0x10)
	#define USBA_FIFO_BASE(x) ((x) << 16)

	/* Synth parameters */
	#define USBA_NR_DMAS 7

	#define EP0_FIFO_SIZE 64
	#define EP0_EPT_SIZE USBA_EPT_SIZE_64
	#define EP0_NR_BANKS 1

	#define FIFO_IOMEM_ID 0
	#define CTRL_IOMEM_ID 1

	#define DBG_ERR 0x0001 /* report all error returns */
	#define DBG_HW 0x0002 /* debug hardware initialization */
	#define DBG_GADGET 0x0004 /* calls to/from gadget driver */
	#define DBG_INT 0x0008 /* interrupts */
	#define DBG_BUS 0x0010 /* report changes in bus state */
	#define DBG_QUEUE 0x0020 /* debug request queue processing */
	#define DBG_FIFO 0x0040 /* debug FIFO contents */
	#define DBG_DMA 0x0080 /* debug DMA handling */
	#define DBG_REQ 0x0100 /* print out queued request length */
	#define DBG_ALL 0xffff
	#define DBG_NONE 0x0000

	#define DEBUG_LEVEL (DBG_ERR)

	#define DBG(level, fmt, ...) \
	do { \
	if ((level) & DEBUG_LEVEL) \
	pr_debug("udc: " fmt, ## __VA_ARGS__); \
	} while (0)

	enum usba_ctrl_state {
	WAIT_FOR_SETUP,
	DATA_STAGE_IN,
	DATA_STAGE_OUT,
	STATUS_STAGE_IN,
	STATUS_STAGE_OUT,
	STATUS_STAGE_ADDR,
	STATUS_STAGE_TEST,
	};
	/*
	EP_STATE_IDLE,
	EP_STATE_SETUP,
	EP_STATE_IN_DATA,
	EP_STATE_OUT_DATA,
	EP_STATE_SET_ADDR_STATUS,
	EP_STATE_RX_STATUS,
	EP_STATE_TX_STATUS,
	EP_STATE_HALT,
	*/

	struct usba_dma_desc {
	dma_addr_t next;
	dma_addr_t addr;
	u32 ctrl;
	};

	struct usba_fifo_cfg {
	u8 hw_ep_num;
	u16 fifo_size;
	u8 nr_banks;
	};

	struct usba_ep {
	int state;
	void __iomem *ep_regs;
	void __iomem *dma_regs;
	void __iomem *fifo;
	char name[8];
	struct usb_ep ep;
	struct usba_udc *udc;

	struct list_head queue;

	u16 fifo_size;
	u8 nr_banks;
	u8 index;
	unsigned int can_dma:1;
	unsigned int can_isoc:1;
	unsigned int is_isoc:1;
	unsigned int is_in:1;
	unsigned long ept_cfg;
	#ifdef CONFIG_USB_GADGET_DEBUG_FS
	u32 last_dma_status;
	struct dentry *debugfs_dir;
	#endif
	};

	struct usba_ep_config {
	u8 nr_banks;
	unsigned int can_dma:1;
	unsigned int can_isoc:1;
	};

	struct usba_request {
	struct usb_request req;
	struct list_head queue;

	u32 ctrl;

	unsigned int submitted:1;
	unsigned int last_transaction:1;
	unsigned int using_dma:1;
	unsigned int mapped:1;
	};

	struct usba_udc_errata {
	void (toggle_bias)(struct usba_udc udc, int is_on);
	void (pulse_bias)(struct usba_udc udc);
	};

	struct usba_udc_config {
	const struct usba_udc_errata *errata;
	const struct usba_ep_config *config;
	const int num_ep;
	const bool ep_prealloc;
	};

	struct usba_udc {
	/* Protect hw registers from concurrent modifications */
	spinlock_t lock;

	/* Mutex to prevent concurrent start or stop */
	struct mutex vbus_mutex;

	void __iomem *regs;
	void __iomem *fifo;

	struct usb_gadget gadget;
	struct usb_gadget_driver *driver;
	struct platform_device *pdev;
	const struct usba_udc_errata *errata;
	int irq;
	struct gpio_desc *vbus_pin;
	int num_ep;
	struct usba_fifo_cfg *fifo_cfg;
	struct clk *pclk;
	struct clk *hclk;
	struct usba_ep *usba_ep;
	bool bias_pulse_needed;
	bool clocked;
	bool suspended;
	bool ep_prealloc;

	u16 devstatus;

	u16 test_mode;
	int vbus_prev;

	u32 int_enb_cache;

	#ifdef CONFIG_USB_GADGET_DEBUG_FS
	struct dentry *debugfs_root;
	#endif

	struct regmap *pmc;
	};

	static inline struct usba_ep to_usba_ep(struct usb_ep ep)
	{
	return container_of(ep, struct usba_ep, ep);
	}

	static inline struct usba_request to_usba_req(struct usb_request req)
	{
	return container_of(req, struct usba_request, req);
	}

	static inline struct usba_udc to_usba_udc(struct usb_gadget gadget)
	{
	return container_of(gadget, struct usba_udc, gadget);
	}

	#define ep_is_control(ep) ((ep)->index == 0)
	#define ep_is_idle(ep) ((ep)->state == EP_STATE_IDLE)

	#endif /* __LINUX_USB_GADGET_USBA_UDC_H */