/*
   * (C) Copyright 2001
   * Denis Peter, MPL AG Switzerland
   *

   * SPDX-License-Identifier:	GPL-2.0+

   * Note: Part of this code has been derived from linux
   *
   */
  #ifndef _USB_H_
  #define _USB_H_
  
  #include <usb_defs.h>

  #include <linux/usb/ch9.h>

  /*
   * The EHCI spec says that we must align to at least 32 bytes.  However,
   * some platforms require larger alignment.
   */
  #if ARCH_DMA_MINALIGN > 32
  #define USB_DMA_MINALIGN	ARCH_DMA_MINALIGN
  #else
  #define USB_DMA_MINALIGN	32
  #endif

  /* Everything is aribtrary */

  #define USB_ALTSETTINGALLOC		4
  #define USB_MAXALTSETTING		128	/* Hard limit */

  #define USB_MAX_DEVICE			32
  #define USB_MAXCONFIG			8
  #define USB_MAXINTERFACES		8
  #define USB_MAXENDPOINTS		16
  #define USB_MAXCHILDREN			8	/* This is arbitrary */
  #define USB_MAX_HUB			16

  
  #define USB_CNTL_TIMEOUT 100 /* 100ms timeout */

  /*
   * This is the timeout to allow for submitting an urb in ms. We allow more
   * time for a BULK device to react - some are slow.
   */

  #define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000)

  /* device request (setup) */
  struct devrequest {

  	unsigned char	requesttype;
  	unsigned char	request;
  	unsigned short	value;
  	unsigned short	index;
  	unsigned short	length;

  } __attribute__ ((packed));

  /* Interface */
  struct usb_interface {
  	struct usb_interface_descriptor desc;

  
  	unsigned char	no_of_ep;
  	unsigned char	num_altsetting;
  	unsigned char	act_altsetting;

  	struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];

  	/*
  	 * Super Speed Device will have Super Speed Endpoint
  	 * Companion Descriptor  (section 9.6.7 of usb 3.0 spec)
  	 * Revision 1.0 June 6th 2011
  	 */
  	struct usb_ss_ep_comp_descriptor ss_ep_comp_desc[USB_MAXENDPOINTS];

  } __attribute__ ((packed));

  /* Configuration information.. */
  struct usb_config {

  	struct usb_config_descriptor desc;

  
  	unsigned char	no_of_if;	/* number of interfaces */

  	struct usb_interface if_desc[USB_MAXINTERFACES];

  } __attribute__ ((packed));

  enum {
  	/* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
  	PACKET_SIZE_8   = 0,
  	PACKET_SIZE_16  = 1,
  	PACKET_SIZE_32  = 2,
  	PACKET_SIZE_64  = 3,
  };

  
  struct usb_device {

  	int	devnum;			/* Device number on USB bus */

  	int	speed;			/* full/low/high */

  	char	mf[32];			/* manufacturer */
  	char	prod[32];		/* product */
  	char	serial[32];		/* serial number */

  	/* Maximum packet size; one of: PACKET_SIZE_* */
  	int maxpacketsize;
  	/* one bit for each endpoint ([0] = IN, [1] = OUT) */
  	unsigned int toggle[2];

  	/* endpoint halts; one bit per endpoint # & direction;
  	 * [0] = IN, [1] = OUT
  	 */

  	unsigned int halted[2];

  	int epmaxpacketin[16];		/* INput endpoint specific maximums */
  	int epmaxpacketout[16];		/* OUTput endpoint specific maximums */
  
  	int configno;			/* selected config number */

  	/* Device Descriptor */
  	struct usb_device_descriptor descriptor
  		__attribute__((aligned(ARCH_DMA_MINALIGN)));

  	struct usb_config config; /* config descriptor */

  
  	int have_langid;		/* whether string_langid is valid yet */
  	int string_langid;		/* language ID for strings */
  	int (*irq_handle)(struct usb_device *dev);
  	unsigned long irq_status;

  	int irq_act_len;		/* transfered bytes */

  	void *privptr;
  	/*
  	 * Child devices -  if this is a hub device
  	 * Each instance needs its own set of data structures.
  	 */
  	unsigned long status;
  	int act_len;			/* transfered bytes */
  	int maxchild;			/* Number of ports if hub */

  	int portnr;

  	struct usb_device *parent;
  	struct usb_device *children[USB_MAXCHILDREN];

  
  	void *controller;		/* hardware controller private data */

  	/* slot_id - for xHCI enabled devices */
  	unsigned int slot_id;

  };

  /*
   * You can initialize platform's USB host or device
   * ports by passing this enum as an argument to
   * board_usb_init().
   */
  enum usb_init_type {
  	USB_INIT_HOST,
  	USB_INIT_DEVICE
  };

  /**********************************************************************
   * this is how the lowlevel part communicate with the outer world
   */

  #if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \

  	defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \

  	defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \

  	defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \

  	defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \

  	defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X) || \

  	defined(CONFIG_USB_MUSB_DSPS) || defined(CONFIG_USB_MUSB_AM35X) || \

  	defined(CONFIG_USB_MUSB_OMAP2PLUS) || defined(CONFIG_USB_XHCI)

  int usb_lowlevel_init(int index, enum usb_init_type init, void **controller);

  int usb_lowlevel_stop(int index);

  int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
  			void *buffer, int transfer_len);

  int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,

  			int transfer_len, struct devrequest *setup);

  int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
  			int transfer_len, int interval);
  
  /* Defines */

  #define USB_UHCI_VEND_ID	0x8086
  #define USB_UHCI_DEV_ID		0x7112

  /*
   * PXA25x can only act as USB device. There are drivers
   * which works with USB CDC gadgets implementations.
   * Some of them have common routines which can be used
   * in boards init functions e.g. udc_disconnect() used for
   * forced device disconnection from host.
   */
  #elif defined(CONFIG_USB_GADGET_PXA2XX)
  
  extern void udc_disconnect(void);

  #endif

  /*

   * board-specific hardware initialization, called by
   * usb drivers and u-boot commands
   *
   * @param index USB controller number
   * @param init initializes controller as USB host or device
   */

  int board_usb_init(int index, enum usb_init_type init);

  
  /*
   * can be used to clean up after failed USB initialization attempt
   * vide: board_usb_init()
   *
   * @param index USB controller number for selective cleanup

   * @param init usb_init_type passed to board_usb_init()

   */

  int board_usb_cleanup(int index, enum usb_init_type init);

  /*
   * If CONFIG_USB_CABLE_CHECK is set then this function
   * should be defined in board file.
   *
   * @return 1 if cable is connected and 0 otherwise.
   */
  #ifdef CONFIG_USB_CABLE_CHECK
  int usb_cable_connected(void);
  #endif

  #ifdef CONFIG_USB_STORAGE
  
  #define USB_MAX_STOR_DEV 5
  block_dev_desc_t *usb_stor_get_dev(int index);
  int usb_stor_scan(int mode);

  int usb_stor_info(void);

  
  #endif

  #ifdef CONFIG_USB_HOST_ETHER
  
  #define USB_MAX_ETH_DEV 5
  int usb_host_eth_scan(int mode);
  
  #endif

  #ifdef CONFIG_USB_KEYBOARD
  
  int drv_usb_kbd_init(void);
  int usb_kbd_deregister(void);
  
  #endif
  /* routines */
  int usb_init(void); /* initialize the USB Controller */
  int usb_stop(void); /* stop the USB Controller */
  
  
  int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);

  int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
  			int report_id);
  struct usb_device *usb_get_dev_index(int index);

  int usb_control_msg(struct usb_device *dev, unsigned int pipe,
  			unsigned char request, unsigned char requesttype,
  			unsigned short value, unsigned short index,
  			void *data, unsigned short size, int timeout);
  int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
  			void *data, int len, int *actual_length, int timeout);
  int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,

  			void *buffer, int transfer_len, int interval);

  int usb_disable_asynch(int disable);

  int usb_maxpacket(struct usb_device *dev, unsigned long pipe);

  int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer,
  				int cfgno);
  int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
  			unsigned char id, void *buf, int size);

  int usb_get_class_descriptor(struct usb_device *dev, int ifnum,

  			unsigned char type, unsigned char id, void *buf,
  			int size);

  int usb_clear_halt(struct usb_device *dev, int pipe);
  int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
  int usb_set_interface(struct usb_device *dev, int interface, int alternate);
  
  /* big endian -> little endian conversion */

  /* some CPUs are already little endian e.g. the ARM920T */

  #define __swap_16(x) \

  	({ unsigned short x_ = (unsigned short)x; \
  	 (unsigned short)( \

  		((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \

  	})

  #define __swap_32(x) \

  	({ unsigned long x_ = (unsigned long)x; \
  	 (unsigned long)( \
  		((x_ & 0x000000FFUL) << 24) | \

  		((x_ & 0x0000FF00UL) <<	 8) | \
  		((x_ & 0x00FF0000UL) >>	 8) | \

  		((x_ & 0xFF000000UL) >> 24)); \

  	})

  #ifdef __LITTLE_ENDIAN

  # define swap_16(x) (x)
  # define swap_32(x) (x)
  #else
  # define swap_16(x) __swap_16(x)
  # define swap_32(x) __swap_32(x)

  #endif

  
  /*
   * Calling this entity a "pipe" is glorifying it. A USB pipe
   * is something embarrassingly simple: it basically consists
   * of the following information:
   *  - device number (7 bits)
   *  - endpoint number (4 bits)
   *  - current Data0/1 state (1 bit)
   *  - direction (1 bit)

   *  - speed (2 bits)

   *  - max packet size (2 bits: 8, 16, 32 or 64)
   *  - pipe type (2 bits: control, interrupt, bulk, isochronous)
   *
   * That's 18 bits. Really. Nothing more. And the USB people have
   * documented these eighteen bits as some kind of glorious
   * virtual data structure.
   *
   * Let's not fall in that trap. We'll just encode it as a simple
   * unsigned int. The encoding is:
   *
   *  - max size:		bits 0-1	(00 = 8, 01 = 16, 10 = 32, 11 = 64)

   *  - direction:	bit 7		(0 = Host-to-Device [Out],
   *					(1 = Device-to-Host [In])

   *  - device:		bits 8-14
   *  - endpoint:		bits 15-18
   *  - Data0/1:		bit 19

   *  - pipe type:	bits 30-31	(00 = isochronous, 01 = interrupt,
   *					 10 = control, 11 = bulk)

   *
   * Why? Because it's arbitrary, and whatever encoding we select is really
   * up to us. This one happens to share a lot of bit positions with the UHCI
   * specification, so that much of the uhci driver can just mask the bits
   * appropriately.
   */
  /* Create various pipes... */
  #define create_pipe(dev,endpoint) \

  		(((dev)->devnum << 8) | ((endpoint) << 15) | \

  		(dev)->maxpacketsize)

  #define default_pipe(dev) ((dev)->speed << 26)

  
  #define usb_sndctrlpipe(dev, endpoint)	((PIPE_CONTROL << 30) | \
  					 create_pipe(dev, endpoint))
  #define usb_rcvctrlpipe(dev, endpoint)	((PIPE_CONTROL << 30) | \
  					 create_pipe(dev, endpoint) | \
  					 USB_DIR_IN)
  #define usb_sndisocpipe(dev, endpoint)	((PIPE_ISOCHRONOUS << 30) | \
  					 create_pipe(dev, endpoint))
  #define usb_rcvisocpipe(dev, endpoint)	((PIPE_ISOCHRONOUS << 30) | \
  					 create_pipe(dev, endpoint) | \
  					 USB_DIR_IN)
  #define usb_sndbulkpipe(dev, endpoint)	((PIPE_BULK << 30) | \
  					 create_pipe(dev, endpoint))
  #define usb_rcvbulkpipe(dev, endpoint)	((PIPE_BULK << 30) | \
  					 create_pipe(dev, endpoint) | \
  					 USB_DIR_IN)
  #define usb_sndintpipe(dev, endpoint)	((PIPE_INTERRUPT << 30) | \
  					 create_pipe(dev, endpoint))
  #define usb_rcvintpipe(dev, endpoint)	((PIPE_INTERRUPT << 30) | \
  					 create_pipe(dev, endpoint) | \
  					 USB_DIR_IN)
  #define usb_snddefctrl(dev)		((PIPE_CONTROL << 30) | \
  					 default_pipe(dev))
  #define usb_rcvdefctrl(dev)		((PIPE_CONTROL << 30) | \
  					 default_pipe(dev) | \
  					 USB_DIR_IN)

  
  /* The D0/D1 toggle bits */
  #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)

  #define usb_dotoggle(dev, ep, out)  ((dev)->toggle[out] ^= (1 << ep))

  #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
  						((dev)->toggle[out] & \
  						 ~(1 << ep)) | ((bit) << ep))

  
  /* Endpoint halt control/status */
  #define usb_endpoint_out(ep_dir)	(((ep_dir >> 7) & 1) ^ 1)
  #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
  #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
  #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))

  #define usb_packetid(pipe)	(((pipe) & USB_DIR_IN) ? USB_PID_IN : \
  				 USB_PID_OUT)

  
  #define usb_pipeout(pipe)	((((pipe) >> 7) & 1) ^ 1)
  #define usb_pipein(pipe)	(((pipe) >> 7) & 1)
  #define usb_pipedevice(pipe)	(((pipe) >> 8) & 0x7f)
  #define usb_pipe_endpdev(pipe)	(((pipe) >> 8) & 0x7ff)
  #define usb_pipeendpoint(pipe)	(((pipe) >> 15) & 0xf)
  #define usb_pipedata(pipe)	(((pipe) >> 19) & 1)

  #define usb_pipetype(pipe)	(((pipe) >> 30) & 3)
  #define usb_pipeisoc(pipe)	(usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
  #define usb_pipeint(pipe)	(usb_pipetype((pipe)) == PIPE_INTERRUPT)
  #define usb_pipecontrol(pipe)	(usb_pipetype((pipe)) == PIPE_CONTROL)
  #define usb_pipebulk(pipe)	(usb_pipetype((pipe)) == PIPE_BULK)

  #define usb_pipe_ep_index(pipe)	\
  		usb_pipecontrol(pipe) ? (usb_pipeendpoint(pipe) * 2) : \
  				((usb_pipeendpoint(pipe) * 2) - \
  				 (usb_pipein(pipe) ? 0 : 1))

  
  /*************************************************************************
   * Hub Stuff
   */
  struct usb_port_status {
  	unsigned short wPortStatus;
  	unsigned short wPortChange;
  } __attribute__ ((packed));
  
  struct usb_hub_status {
  	unsigned short wHubStatus;
  	unsigned short wHubChange;
  } __attribute__ ((packed));
  
  
  /* Hub descriptor */
  struct usb_hub_descriptor {
  	unsigned char  bLength;
  	unsigned char  bDescriptorType;
  	unsigned char  bNbrPorts;
  	unsigned short wHubCharacteristics;
  	unsigned char  bPwrOn2PwrGood;
  	unsigned char  bHubContrCurrent;
  	unsigned char  DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
  	unsigned char  PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];

  	/* DeviceRemovable and PortPwrCtrlMask want to be variable-length

  	   bitmaps that hold max 255 entries. (bit0 is ignored) */
  } __attribute__ ((packed));
  
  
  struct usb_hub_device {
  	struct usb_device *pusb_dev;
  	struct usb_hub_descriptor desc;
  };

  int usb_hub_probe(struct usb_device *dev, int ifnum);
  void usb_hub_reset(void);
  int hub_port_reset(struct usb_device *dev, int port,
  			  unsigned short *portstat);

  struct usb_device *usb_alloc_new_device(void *controller);

  int usb_new_device(struct usb_device *dev);

  void usb_free_device(void);

  int usb_alloc_device(struct usb_device *dev);

  #endif /*_USB_H_ */