drivers/usb/gadget/goku_udc.h - kernel/prism - Git at Google

 /*
  * Toshiba TC86C001 ("Goku-S") USB Device Controller driver
  *
  * Copyright (C) 2000-2002 Lineo
  *      by Stuart Lynne, Tom Rushworth, and Bruce Balden
  * Copyright (C) 2002 Toshiba Corporation
  * Copyright (C) 2003 MontaVista Software (source@mvista.com)
  *
  * This file is licensed under the terms of the GNU General Public
  * License version 2.  This program is licensed "as is" without any
  * warranty of any kind, whether express or implied.
  */

 /*
  * PCI BAR 0 points to these registers.
  */
 struct goku_udc_regs {
 	/* irq management */
 	u32	int_status;		/* 0x000 */
 	u32	int_enable;
 #define INT_SUSPEND		0x00001		/* or resume */
 #define INT_USBRESET		0x00002
 #define INT_ENDPOINT0		0x00004
 #define INT_SETUP		0x00008
 #define INT_STATUS		0x00010
 #define INT_STATUSNAK		0x00020
 #define INT_EPxDATASET(n)	(0x00020 << (n))	/* 0 < n < 4 */
 #	define INT_EP1DATASET		0x00040
 #	define INT_EP2DATASET		0x00080
 #	define INT_EP3DATASET		0x00100
 #define INT_EPnNAK(n)		(0x00100 < (n))		/* 0 < n < 4 */
 #	define INT_EP1NAK		0x00200
 #	define INT_EP2NAK		0x00400
 #	define INT_EP3NAK		0x00800
 #define INT_SOF			0x01000
 #define INT_ERR			0x02000
 #define INT_MSTWRSET		0x04000
 #define INT_MSTWREND		0x08000
 #define INT_MSTWRTMOUT		0x10000
 #define INT_MSTRDEND		0x20000
 #define INT_SYSERROR		0x40000
 #define INT_PWRDETECT		0x80000

 #define	INT_DEVWIDE \
 	(INT_PWRDETECT|INT_SYSERROR/*|INT_ERR*/|INT_USBRESET|INT_SUSPEND)
 #define	INT_EP0 \
 	(INT_SETUP|INT_ENDPOINT0/*|INT_STATUS*/|INT_STATUSNAK)

 	u32	dma_master;
 #define MST_EOPB_DIS		0x0800
 #define MST_EOPB_ENA		0x0400
 #define MST_TIMEOUT_DIS		0x0200
 #define MST_TIMEOUT_ENA		0x0100
 #define MST_RD_EOPB		0x0080		/* write-only */
 #define MST_RD_RESET		0x0040
 #define MST_WR_RESET		0x0020
 #define MST_RD_ENA		0x0004		/* 1:start, 0:ignore */
 #define MST_WR_ENA		0x0002		/* 1:start, 0:ignore */
 #define MST_CONNECTION		0x0001		/* 0 for ep1out/ep2in */

 #define MST_R_BITS		(MST_EOPB_DIS|MST_EOPB_ENA \
 					|MST_RD_ENA|MST_RD_RESET)
 #define MST_W_BITS		(MST_TIMEOUT_DIS|MST_TIMEOUT_ENA \
 					|MST_WR_ENA|MST_WR_RESET)
 #define MST_RW_BITS		(MST_R_BITS|MST_W_BITS \
 					|MST_CONNECTION)

 /* these values assume (dma_master & MST_CONNECTION) == 0 */
 #define UDC_MSTWR_ENDPOINT        1
 #define UDC_MSTRD_ENDPOINT        2

 	/* dma master write */
 	u32	out_dma_start;
 	u32	out_dma_end;
 	u32	out_dma_current;

 	/* dma master read */
 	u32	in_dma_start;
 	u32	in_dma_end;
 	u32	in_dma_current;

 	u32	power_detect;
 #define PW_DETECT		0x04
 #define PW_RESETB		0x02
 #define PW_PULLUP		0x01

 	u8	_reserved0 [0x1d8];

 	/* endpoint registers */
 	u32	ep_fifo [4];		/* 0x200 */
 	u8	_reserved1 [0x10];
 	u32	ep_mode [4];		/* only 1-3 valid */
 	u8	_reserved2 [0x10];

 	u32	ep_status [4];
 #define EPxSTATUS_TOGGLE	0x40
 #define EPxSTATUS_SUSPEND	0x20
 #define EPxSTATUS_EP_MASK	(0x07<<2)
 #	define EPxSTATUS_EP_READY	(0<<2)
 #	define EPxSTATUS_EP_DATAIN	(1<<2)
 #	define EPxSTATUS_EP_FULL	(2<<2)
 #	define EPxSTATUS_EP_TX_ERR	(3<<2)
 #	define EPxSTATUS_EP_RX_ERR	(4<<2)
 #	define EPxSTATUS_EP_BUSY	(5<<2)
 #	define EPxSTATUS_EP_STALL	(6<<2)
 #	define EPxSTATUS_EP_INVALID	(7<<2)
 #define EPxSTATUS_FIFO_DISABLE	0x02
 #define EPxSTATUS_STAGE_ERROR	0x01

 	u8	_reserved3 [0x10];
 	u32	EPxSizeLA[4];
 #define PACKET_ACTIVE		(1<<7)
 #define DATASIZE		0x7f
 	u8	_reserved3a [0x10];
 	u32	EPxSizeLB[4];		/* only 1,2 valid */
 	u8	_reserved3b [0x10];
 	u32	EPxSizeHA[4];		/* only 1-3 valid */
 	u8	_reserved3c [0x10];
 	u32	EPxSizeHB[4];		/* only 1,2 valid */
 	u8	_reserved4[0x30];

 	/* SETUP packet contents */
 	u32	bRequestType;		/* 0x300 */
 	u32	bRequest;
 	u32	wValueL;
 	u32	wValueH;
 	u32	wIndexL;
 	u32	wIndexH;
 	u32	wLengthL;
 	u32	wLengthH;

 	/* command interaction/handshaking */
 	u32	SetupRecv;		/* 0x320 */
 	u32	CurrConfig;
 	u32	StdRequest;
 	u32	Request;
 	u32	DataSet;
 #define DATASET_A(epnum)	(1<<(2*(epnum)))
 #define DATASET_B(epnum)	(2<<(2*(epnum)))
 #define DATASET_AB(epnum)	(3<<(2*(epnum)))
 	u8	_reserved5[4];

 	u32	UsbState;
 #define USBSTATE_CONFIGURED	0x04
 #define USBSTATE_ADDRESSED	0x02
 #define USBSTATE_DEFAULT	0x01

 	u32	EOP;

 	u32	Command;		/* 0x340 */
 #define COMMAND_SETDATA0	2
 #define COMMAND_RESET		3
 #define COMMAND_STALL		4
 #define COMMAND_INVALID		5
 #define COMMAND_FIFO_DISABLE	7
 #define COMMAND_FIFO_ENABLE	8
 #define COMMAND_INIT_DESCRIPTOR	9
 #define COMMAND_FIFO_CLEAR	10	/* also stall */
 #define COMMAND_STALL_CLEAR	11
 #define COMMAND_EP(n)		((n) << 4)

 	u32	EPxSingle;
 	u8	_reserved6[4];
 	u32	EPxBCS;
 	u8	_reserved7[8];
 	u32	IntControl;
 #define ICONTROL_STATUSNAK	1
 	u8	_reserved8[4];

 	u32	reqmode;	// 0x360 standard request mode, low 8 bits
 #define G_REQMODE_SET_INTF	(1<<7)
 #define G_REQMODE_GET_INTF	(1<<6)
 #define G_REQMODE_SET_CONF	(1<<5)
 #define G_REQMODE_GET_CONF	(1<<4)
 #define G_REQMODE_GET_DESC	(1<<3)
 #define G_REQMODE_SET_FEAT	(1<<2)
 #define G_REQMODE_CLEAR_FEAT	(1<<1)
 #define G_REQMODE_GET_STATUS	(1<<0)

 	u32	ReqMode;
 	u8	_reserved9[0x18];
 	u32	PortStatus;		/* 0x380 */
 	u8	_reserved10[8];
 	u32	address;
 	u32	buff_test;
 	u8	_reserved11[4];
 	u32	UsbReady;
 	u8	_reserved12[4];
 	u32	SetDescStall;		/* 0x3a0 */
 	u8	_reserved13[0x45c];

 	/* hardware could handle limited GET_DESCRIPTOR duties */
 #define	DESC_LEN	0x80
 	u32	descriptors[DESC_LEN];	/* 0x800 */
 	u8	_reserved14[0x600];

 } __attribute__ ((packed));

 #define	MAX_FIFO_SIZE	64
 #define	MAX_EP0_SIZE	8		/* ep0 fifo is bigger, though */


 /*-------------------------------------------------------------------------*/

 /* DRIVER DATA STRUCTURES and UTILITIES */

 struct goku_ep {
 	struct usb_ep				ep;
 	struct goku_udc				*dev;
 	unsigned long				irqs;

 	unsigned				num:8,
 						dma:1,
 						is_in:1,
 						stopped:1;

 	/* analogous to a host-side qh */
 	struct list_head			queue;
 	const struct usb_endpoint_descriptor	*desc;

 	u32 __iomem				*reg_fifo;
 	u32 __iomem				*reg_mode;
 	u32 __iomem				*reg_status;
 };

 struct goku_request {
 	struct usb_request		req;
 	struct list_head		queue;

 	unsigned			mapped:1;
 };

 enum ep0state {
 	EP0_DISCONNECT,		/* no host */
 	EP0_IDLE,		/* between STATUS ack and SETUP report */
 	EP0_IN, EP0_OUT,	/* data stage */
 	EP0_STATUS,		/* status stage */
 	EP0_STALL,		/* data or status stages */
 	EP0_SUSPEND,		/* usb suspend */
 };

 struct goku_udc {
 	/* each pci device provides one gadget, several endpoints */
 	struct usb_gadget		gadget;
 	spinlock_t			lock;
 	struct goku_ep			ep[4];
 	struct usb_gadget_driver	*driver;

 	enum ep0state			ep0state;
 	unsigned			got_irq:1,
 					got_region:1,
 					req_config:1,
 					configured:1,
 					enabled:1;

 	/* pci state used to access those endpoints */
 	struct pci_dev			*pdev;
 	struct goku_udc_regs __iomem	*regs;
 	u32				int_enable;

 	/* statistics... */
 	unsigned long			irqs;
 };

 /*-------------------------------------------------------------------------*/

 #define xprintk(dev,level,fmt,args...) \
 	printk(level "%s %s: " fmt , driver_name , \
 			pci_name(dev->pdev) , ## args)

 #ifdef DEBUG
 #define DBG(dev,fmt,args...) \
 	xprintk(dev , KERN_DEBUG , fmt , ## args)
 #else
 #define DBG(dev,fmt,args...) \
 	do { } while (0)
 #endif /* DEBUG */

 #ifdef VERBOSE
 #define VDBG DBG
 #else
 #define VDBG(dev,fmt,args...) \
 	do { } while (0)
 #endif	/* VERBOSE */

 #define ERROR(dev,fmt,args...) \
 	xprintk(dev , KERN_ERR , fmt , ## args)
 #define WARNING(dev,fmt,args...) \
 	xprintk(dev , KERN_WARNING , fmt , ## args)
 #define INFO(dev,fmt,args...) \
 	xprintk(dev , KERN_INFO , fmt , ## args)
	/*
	* Toshiba TC86C001 ("Goku-S") USB Device Controller driver
	*
	* Copyright (C) 2000-2002 Lineo
	* by Stuart Lynne, Tom Rushworth, and Bruce Balden
	* Copyright (C) 2002 Toshiba Corporation
	* Copyright (C) 2003 MontaVista Software (source@mvista.com)
	*
	* This file is licensed under the terms of the GNU General Public
	* License version 2. This program is licensed "as is" without any
	* warranty of any kind, whether express or implied.
	*/

	/*
	* PCI BAR 0 points to these registers.
	*/
	struct goku_udc_regs {
	/* irq management */
	u32 int_status; /* 0x000 */
	u32 int_enable;
	#define INT_SUSPEND 0x00001 /* or resume */
	#define INT_USBRESET 0x00002
	#define INT_ENDPOINT0 0x00004
	#define INT_SETUP 0x00008
	#define INT_STATUS 0x00010
	#define INT_STATUSNAK 0x00020
	#define INT_EPxDATASET(n) (0x00020 << (n)) /* 0 < n < 4 */
	# define INT_EP1DATASET 0x00040
	# define INT_EP2DATASET 0x00080
	# define INT_EP3DATASET 0x00100
	#define INT_EPnNAK(n) (0x00100 < (n)) /* 0 < n < 4 */
	# define INT_EP1NAK 0x00200
	# define INT_EP2NAK 0x00400
	# define INT_EP3NAK 0x00800
	#define INT_SOF 0x01000
	#define INT_ERR 0x02000
	#define INT_MSTWRSET 0x04000
	#define INT_MSTWREND 0x08000
	#define INT_MSTWRTMOUT 0x10000
	#define INT_MSTRDEND 0x20000
	#define INT_SYSERROR 0x40000
	#define INT_PWRDETECT 0x80000

	#define INT_DEVWIDE \
	(INT_PWRDETECT\|INT_SYSERROR/\|INT_ERR/\|INT_USBRESET\|INT_SUSPEND)
	#define INT_EP0 \
	(INT_SETUP\|INT_ENDPOINT0/\|INT_STATUS/\|INT_STATUSNAK)

	u32 dma_master;
	#define MST_EOPB_DIS 0x0800
	#define MST_EOPB_ENA 0x0400
	#define MST_TIMEOUT_DIS 0x0200
	#define MST_TIMEOUT_ENA 0x0100
	#define MST_RD_EOPB 0x0080 /* write-only */
	#define MST_RD_RESET 0x0040
	#define MST_WR_RESET 0x0020
	#define MST_RD_ENA 0x0004 /* 1:start, 0:ignore */
	#define MST_WR_ENA 0x0002 /* 1:start, 0:ignore */
	#define MST_CONNECTION 0x0001 /* 0 for ep1out/ep2in */

	#define MST_R_BITS (MST_EOPB_DIS\|MST_EOPB_ENA \
	\|MST_RD_ENA\|MST_RD_RESET)
	#define MST_W_BITS (MST_TIMEOUT_DIS\|MST_TIMEOUT_ENA \
	\|MST_WR_ENA\|MST_WR_RESET)
	#define MST_RW_BITS (MST_R_BITS\|MST_W_BITS \
	\|MST_CONNECTION)

	/* these values assume (dma_master & MST_CONNECTION) == 0 */
	#define UDC_MSTWR_ENDPOINT 1
	#define UDC_MSTRD_ENDPOINT 2

	/* dma master write */
	u32 out_dma_start;
	u32 out_dma_end;
	u32 out_dma_current;

	/* dma master read */
	u32 in_dma_start;
	u32 in_dma_end;
	u32 in_dma_current;

	u32 power_detect;
	#define PW_DETECT 0x04
	#define PW_RESETB 0x02
	#define PW_PULLUP 0x01

	u8 _reserved0 [0x1d8];

	/* endpoint registers */
	u32 ep_fifo [4]; /* 0x200 */
	u8 _reserved1 [0x10];
	u32 ep_mode [4]; /* only 1-3 valid */
	u8 _reserved2 [0x10];

	u32 ep_status [4];
	#define EPxSTATUS_TOGGLE 0x40
	#define EPxSTATUS_SUSPEND 0x20
	#define EPxSTATUS_EP_MASK (0x07<<2)
	# define EPxSTATUS_EP_READY (0<<2)
	# define EPxSTATUS_EP_DATAIN (1<<2)
	# define EPxSTATUS_EP_FULL (2<<2)
	# define EPxSTATUS_EP_TX_ERR (3<<2)
	# define EPxSTATUS_EP_RX_ERR (4<<2)
	# define EPxSTATUS_EP_BUSY (5<<2)
	# define EPxSTATUS_EP_STALL (6<<2)
	# define EPxSTATUS_EP_INVALID (7<<2)
	#define EPxSTATUS_FIFO_DISABLE 0x02
	#define EPxSTATUS_STAGE_ERROR 0x01

	u8 _reserved3 [0x10];
	u32 EPxSizeLA[4];
	#define PACKET_ACTIVE (1<<7)
	#define DATASIZE 0x7f
	u8 _reserved3a [0x10];
	u32 EPxSizeLB[4]; /* only 1,2 valid */
	u8 _reserved3b [0x10];
	u32 EPxSizeHA[4]; /* only 1-3 valid */
	u8 _reserved3c [0x10];
	u32 EPxSizeHB[4]; /* only 1,2 valid */
	u8 _reserved4[0x30];

	/* SETUP packet contents */
	u32 bRequestType; /* 0x300 */
	u32 bRequest;
	u32 wValueL;
	u32 wValueH;
	u32 wIndexL;
	u32 wIndexH;
	u32 wLengthL;
	u32 wLengthH;

	/* command interaction/handshaking */
	u32 SetupRecv; /* 0x320 */
	u32 CurrConfig;
	u32 StdRequest;
	u32 Request;
	u32 DataSet;
	#define DATASET_A(epnum) (1<<(2*(epnum)))
	#define DATASET_B(epnum) (2<<(2*(epnum)))
	#define DATASET_AB(epnum) (3<<(2*(epnum)))
	u8 _reserved5[4];

	u32 UsbState;
	#define USBSTATE_CONFIGURED 0x04
	#define USBSTATE_ADDRESSED 0x02
	#define USBSTATE_DEFAULT 0x01

	u32 EOP;

	u32 Command; /* 0x340 */
	#define COMMAND_SETDATA0 2
	#define COMMAND_RESET 3
	#define COMMAND_STALL 4
	#define COMMAND_INVALID 5
	#define COMMAND_FIFO_DISABLE 7
	#define COMMAND_FIFO_ENABLE 8
	#define COMMAND_INIT_DESCRIPTOR 9
	#define COMMAND_FIFO_CLEAR 10 /* also stall */
	#define COMMAND_STALL_CLEAR 11
	#define COMMAND_EP(n) ((n) << 4)

	u32 EPxSingle;
	u8 _reserved6[4];
	u32 EPxBCS;
	u8 _reserved7[8];
	u32 IntControl;
	#define ICONTROL_STATUSNAK 1
	u8 _reserved8[4];

	u32 reqmode; // 0x360 standard request mode, low 8 bits
	#define G_REQMODE_SET_INTF (1<<7)
	#define G_REQMODE_GET_INTF (1<<6)
	#define G_REQMODE_SET_CONF (1<<5)
	#define G_REQMODE_GET_CONF (1<<4)
	#define G_REQMODE_GET_DESC (1<<3)
	#define G_REQMODE_SET_FEAT (1<<2)
	#define G_REQMODE_CLEAR_FEAT (1<<1)
	#define G_REQMODE_GET_STATUS (1<<0)

	u32 ReqMode;
	u8 _reserved9[0x18];
	u32 PortStatus; /* 0x380 */
	u8 _reserved10[8];
	u32 address;
	u32 buff_test;
	u8 _reserved11[4];
	u32 UsbReady;
	u8 _reserved12[4];
	u32 SetDescStall; /* 0x3a0 */
	u8 _reserved13[0x45c];

	/* hardware could handle limited GET_DESCRIPTOR duties */
	#define DESC_LEN 0x80
	u32 descriptors[DESC_LEN]; /* 0x800 */
	u8 _reserved14[0x600];

	} __attribute__ ((packed));

	#define MAX_FIFO_SIZE 64
	#define MAX_EP0_SIZE 8 /* ep0 fifo is bigger, though */


	/-------------------------------------------------------------------------/

	/* DRIVER DATA STRUCTURES and UTILITIES */

	struct goku_ep {
	struct usb_ep ep;
	struct goku_udc *dev;
	unsigned long irqs;

	unsigned num:8,
	dma:1,
	is_in:1,
	stopped:1;

	/* analogous to a host-side qh */
	struct list_head queue;
	const struct usb_endpoint_descriptor *desc;

	u32 __iomem *reg_fifo;
	u32 __iomem *reg_mode;
	u32 __iomem *reg_status;
	};

	struct goku_request {
	struct usb_request req;
	struct list_head queue;

	unsigned mapped:1;
	};

	enum ep0state {
	EP0_DISCONNECT, /* no host */
	EP0_IDLE, /* between STATUS ack and SETUP report */
	EP0_IN, EP0_OUT, /* data stage */
	EP0_STATUS, /* status stage */
	EP0_STALL, /* data or status stages */
	EP0_SUSPEND, /* usb suspend */
	};

	struct goku_udc {
	/* each pci device provides one gadget, several endpoints */
	struct usb_gadget gadget;
	spinlock_t lock;
	struct goku_ep ep[4];
	struct usb_gadget_driver *driver;

	enum ep0state ep0state;
	unsigned got_irq:1,
	got_region:1,
	req_config:1,
	configured:1,
	enabled:1;

	/* pci state used to access those endpoints */
	struct pci_dev *pdev;
	struct goku_udc_regs __iomem *regs;
	u32 int_enable;

	/* statistics... */
	unsigned long irqs;
	};

	/-------------------------------------------------------------------------/

	#define xprintk(dev,level,fmt,args...) \
	printk(level "%s %s: " fmt , driver_name , \
	pci_name(dev->pdev) , ## args)

	#ifdef DEBUG
	#define DBG(dev,fmt,args...) \
	xprintk(dev , KERN_DEBUG , fmt , ## args)
	#else
	#define DBG(dev,fmt,args...) \
	do { } while (0)
	#endif /* DEBUG */

	#ifdef VERBOSE
	#define VDBG DBG
	#else
	#define VDBG(dev,fmt,args...) \
	do { } while (0)
	#endif /* VERBOSE */

	#define ERROR(dev,fmt,args...) \
	xprintk(dev , KERN_ERR , fmt , ## args)
	#define WARNING(dev,fmt,args...) \
	xprintk(dev , KERN_WARNING , fmt , ## args)
	#define INFO(dev,fmt,args...) \
	xprintk(dev , KERN_INFO , fmt , ## args)