patch-2.2.18 linux/drivers/usb/ohci.h

• Lines: 350
• Date: Thu Jan 1 01:00:00 1970
• Orig file: v2.2.17/drivers/usb/ohci.h
• Orig date: Fri Apr 21 12:46:37 2000

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/usb/ohci.h linux/drivers/usb/ohci.h
@@ -1,349 +0,0 @@
-#ifndef __LINUX_OHCI_H
-#define __LINUX_OHCI_H
-
-/*
- * Open Host Controller Interface data structures and defines.
- *
- * (C) Copyright 1999 Gregory P. Smith <greg@electricrain.com>
- *
- * $Id: ohci.h,v 1.15 1999/05/09 23:25:49 greg Exp $
- */
-
-#include <linux/list.h>
-#include <asm/io.h>
-
-#include "usb.h"
-
-struct ohci_ed;
-
-/*
- * Each TD must be aligned on a 16-byte boundary.  From the OHCI v1.0 spec
- * it does not state that TDs must be contiguious in memory (due to the
- * use of the next_td field).  This gives us extra room at the end of a
- * TD for our own driver specific data.
- *
- * This structure's size must be a multiple of 16 bytes. ?? no way, I
- * don't see why.  Alignment should be all that matters.
- */
-struct ohci_td {
-    	/* OHCI Hardware fields */
-    	__u32 info;		/* TD status & type flags */
-	__u32 cur_buf;		/* Current Buffer Pointer (bus address) */
-	__u32 next_td;		/* Next TD Pointer (bus address) */
-	__u32 buf_end;		/* Memory Buffer End Pointer (bus address) */
-
-	/* Driver specific fields */
-	struct ohci_ed *ed;		/* address of the ED this TD is on */
-	struct ohci_td *next_dl_td;	/* used during donelist processing */
-	void *data;			/* virt. address of the the buffer */
-	usb_device_irq completed;	/* Completion handler routine */
-	int allocated;			/* boolean: is this TD allocated? */
-
-	/* User or Device class driver specific fields */
-	void *dev_id;	/* user defined pointer passed to irq handler */
-} __attribute((aligned(16)));
-
-#define OHCI_TD_ROUND	(1 << 18)	/* buffer rounding bit */
-#define OHCI_TD_D	(3 << 19)	/* direction of xfer: */
-#define OHCI_TD_D_IN	(2 << 19)
-#define OHCI_TD_D_OUT	(1 << 19)
-#define OHCI_TD_D_SETUP (0 << 19)
-#define td_set_dir_in(d)	((d) ? OHCI_TD_D_IN : OHCI_TD_D_OUT )
-#define td_set_dir_out(d)	((d) ? OHCI_TD_D_OUT : OHCI_TD_D_IN )
-#define OHCI_TD_IOC_DELAY (7 << 21)	/* frame delay allowed before int. */
-#define OHCI_TD_IOC_OFF	(OHCI_TD_IOC_DELAY)	/* no interrupt on complete */
-#define OHCI_TD_DT	(3 << 24)	/* data toggle bits */
-#define TOGGLE_AUTO	(0 << 24)	/* automatic (from the ED) */
-#define TOGGLE_DATA0	(2 << 24)	/* force Data0 */
-#define TOGGLE_DATA1	(3 << 24)	/* force Data1 */
-#define td_force_toggle(b)	(((b) | 2) << 24)
-#define OHCI_TD_ERRCNT	(3 << 26)	/* error count */
-#define td_errorcount(td)	(((td).info >> 26) & 3)
-#define OHCI_TD_CC	(0xf << 28)	/* condition code */
-#define OHCI_TD_CC_GET(td_i) (((td_i) >> 28) & 0xf)
-#define OHCI_TD_CC_NEW	(OHCI_TD_CC)	/* set this on all unaccessed TDs! */
-#define td_cc_notaccessed(td)	(((td).info >> 29) == 7)
-#define td_cc_accessed(td)	(((td).info >> 29) != 7)
-#define td_cc_noerror(td)	((((td).info) & OHCI_TD_CC) == 0)
-#define td_active(td)	(!td_cc_noerror((td)) && (td_errorcount((td)) < 3))
-#define td_done(td)	(td_cc_noerror((td)) || (td_errorcount((td)) == 3))
-
-#define td_allocated(td)	((td).allocated)
-#define allocate_td(td)		((td)->allocated = 1)
-#define ohci_free_td(td)	((td)->allocated = 0)
-
-
-/*
- * The endpoint descriptors also requires 16-byte alignment
- */
-struct ohci_ed {
-	/* OHCI hardware fields */
-	__u32 status;
-	__u32 tail_td;	/* TD Queue tail pointer */
-	__u32 _head_td;	/* TD Queue head pointer, toggle carry & halted bits */
-	__u32 next_ed;	/* Next ED */
-} __attribute((aligned(16)));
-
-/* get the head_td */
-#define ed_head_td(ed)	((ed)->_head_td & 0xfffffff0)
-
-/* save the carry flag while setting the head_td */
-#define set_ed_head_td(ed, td)	((ed)->_head_td = (td) | ((ed)->_head_td & 3))
-
-#define OHCI_ED_SKIP	(1 << 14)
-#define OHCI_ED_MPS	(0x7ff << 16)
-/* FIXME: should cap at the USB max packet size [0x4ff] */
-#define ed_set_maxpacket(s)	(((s) << 16) & OHCI_ED_MPS)
-#define OHCI_ED_F_NORM	(0)
-#define OHCI_ED_F_ISOC	(1 << 15)
-#define ed_set_type_isoc(i)	((i) ? OHCI_ED_F_ISOC : OHCI_ED_F_NORM)
-#define OHCI_ED_S_LOW	(1 << 13)
-#define OHCI_ED_S_HIGH	(0)
-#define ed_set_speed(s)		((s) ? OHCI_ED_S_LOW : OHCI_ED_S_HIGH)
-#define OHCI_ED_D	(3 << 11)
-#define OHCI_ED_D_IN	(2 << 11)
-#define OHCI_ED_D_OUT	(1 << 11)
-#define ed_set_dir_in(d)	((d) ? OHCI_ED_D_IN : OHCI_ED_D_OUT)
-#define ed_set_dir_out(d)	((d) ? OHCI_ED_D_OUT : OHCI_ED_D_IN)
-#define OHCI_ED_EN	(0xf << 7)
-#define OHCI_ED_FA	(0x7f)
-
-
-/* NOTE: bits 27-31 of the status dword are reserved for the driver */
-/*
- * We'll use this status flag for to mark if an ED is in use by the
- * driver or not.  If the bit is set, it is used.
- *
- * FIXME: implement this!
- */
-#define ED_USED	(1 << 31)
-
-/*
- * The HCCA (Host Controller Communications Area) is a 256 byte
- * structure defined in the OHCI spec. that the host controller is
- * told the base address of.  It must be 256-byte aligned.
- */
-#define NUM_INTS 32	/* part of the OHCI standard */
-struct ohci_hcca {
-    	__u32	int_table[NUM_INTS];	/* Interrupt ED table */
-	__u16	frame_no;		/* current frame number */
-	__u16	pad1;			/* set to 0 on each frame_no change */
-	__u32	donehead;		/* info returned for an interrupt */
-	u8	reserved_for_hc[116];
-} __attribute((aligned(256)));
-
-/*
- * The TD entries here are pre-allocated as Linus did with his simple
- * UHCI implementation.  With the current state of this driver that
- * shouldn't be a problem.  However if someone ever connects 127
- * supported devices to this driver and tries to use them all at once:
- * 	a)  They're insane!
- * 	b)  They should code in dynamic allocation
- */
-struct ohci;
-
-/*
- *  Warning: These constants must not be so large as to cause the
- *  ohci_device structure to exceed one 4096 byte page.  Or "weird
- *  things will happen" as the alloc_ohci() function assumes that
- *  its less than one page.  (FIXME)
- */
-#define NUM_TDS	32		/* num of preallocated transfer descriptors */
-#define DATA_BUF_LEN 16		/* num of unsigned long's for the data buf */
-
-/*
- * For this "simple" driver we only support a single ED for each
- * polling rate.
- *
- * Later on this driver should be extended to use a full tree of EDs
- * so that there can be 32 different 32ms polling frames, etc.
- * Individual devices shouldn't need as many as the root hub in that
- * case; complicating how things are done at the moment.
- *
- * Bulk and Control transfers hang off of their own ED lists.
- */
-#define NUM_EDS 16		/* num of preallocated endpoint descriptors */
-
-#define ohci_to_usb(ohci)	((ohci)->usb)
-#define usb_to_ohci(usb)	((struct ohci_device *)(usb)->hcpriv)
-
-/* The usb_device must be first! */
-struct ohci_device {
-    	struct usb_device	*usb;
-
-	struct ohci		*ohci;
-	struct ohci_hcca 	*hcca;		/* OHCI mem. mapped IO area */
-
-	struct ohci_ed		ed[NUM_EDS];	/* Endpoint Descriptors */
-	struct ohci_td		td[NUM_TDS];	/* Transfer Descriptors */
-
-	unsigned long		data[DATA_BUF_LEN];
-};
-
-/* .... */
-
-#define ED_INT_1	0
-#define ED_INT_2	1
-#define ED_INT_4	2
-#define ED_INT_8	3
-#define ED_INT_16	4
-#define ED_INT_32	5
-#define ED_CONTROL	6
-#define ED_BULK		7
-#define ED_ISO		ED_INT_1	/* same as 1ms interrupt queue */
-#define ED_FIRST_AVAIL  8		/* first non-reserved ED */
-
-/*
- * Given a period p in ms, convert it to the closest endpoint
- * interrupt frequency; rounding down.  This is a gross macro.
- * Feel free to toss it for actual code. (gasp!)
- */
-#define ms_to_ed_int(p) \
-	((p >= 32) ? ED_INT_32 : \
-	 ((p & 16) ? ED_INT_16 : \
-	  ((p & 8) ? ED_INT_8 : \
-	   ((p & 4) ? ED_INT_4 : \
-	    ((p & 2) ? ED_INT_2 : \
-	     ED_INT_1)))))  /* hmm.. scheme or lisp anyone? */
-
-/*
- * This is the maximum number of root hub ports.  I don't think we'll
- * ever see more than two as that's the space available on an ATX
- * motherboard's case, but it could happen.  The OHCI spec allows for
- * up to 15... (which is insane!)
- * 
- * Although I suppose several "ports" could be connected directly to
- * internal laptop devices such as a keyboard, mouse, camera and
- * serial/parallel ports.  hmm...  That'd be neat.
- */
-#define MAX_ROOT_PORTS	15	/* maximum OHCI root hub ports */
-
-/*
- * This is the structure of the OHCI controller's memory mapped I/O
- * region.  This is Memory Mapped I/O.  You must use the readl() and
- * writel() macros defined in asm/io.h to access these!!
- */
-struct ohci_regs {
-	/* control and status registers */
-	__u32	revision;
-	__u32	control;
-	__u32	cmdstatus;
-	__u32	intrstatus;
-	__u32	intrenable;
-	__u32	intrdisable;
-	/* memory pointers */
-	__u32	hcca;
-	__u32	ed_periodcurrent;
-	__u32	ed_controlhead;
-	__u32	ed_controlcurrent;
-	__u32	ed_bulkhead;
-	__u32	ed_bulkcurrent;
-	__u32	current_donehead; /* The driver should get this from the HCCA */
-	/* frame counters */
-	__u32	fminterval;
-	__u32	fmremaining;
-	__u32	fmnumber;
-	__u32	periodicstart;
-	__u32	lsthresh;
-	/* Root hub ports */
-	struct	ohci_roothub_regs {
-		__u32	a;
-		__u32	b;
-		__u32	status;
-		__u32	portstatus[MAX_ROOT_PORTS];
-	} roothub;
-} __attribute((aligned(32)));
-
-/* 
- * Read a MMIO register and re-write it after ANDing with (m)
- */
-#define writel_mask(m, a) writel( (readl((__u32)(a))) & (__u32)(m), (__u32)(a) )
-
-/*
- * Read a MMIO register and re-write it after ORing with (b)
- */
-#define writel_set(b, a) writel( (readl((__u32)(a))) | (__u32)(b), (__u32)(a) )
-
-
-#define PORT_CCS	(1)		/* port current connect status */
-#define PORT_PES	(1 << 1)	/* port enable status */
-#define PORT_PSS	(1 << 2)	/* port suspend status */
-#define PORT_POCI	(1 << 3)	/* port overcurrent indicator */
-#define PORT_PRS	(1 << 4)	/* port reset status */
-#define PORT_PPS	(1 << 8)	/* port power status */
-#define PORT_LSDA	(1 << 9)	/* port low speed dev. attached */
-#define PORT_CSC	(1 << 16)	/* port connect status change */
-#define PORT_PESC	(1 << 17)	/* port enable status change */
-#define PORT_PSSC	(1 << 18)	/* port suspend status change */
-#define PORT_OCIC	(1 << 19)	/* port over current indicator chg */
-#define PORT_PRSC	(1 << 20)	/* port reset status change */
-
-/*
- * Root Hub status register masks
- */
-#define OHCI_ROOT_LPS	(1)		/* turn off root hub ports power */
-#define OHCI_ROOT_OCI	(1 << 1)	/* Overcurrent Indicator */
-#define OHCI_ROOT_DRWE	(1 << 15)	/* Device remote wakeup enable */
-#define OHCI_ROOT_LPSC	(1 << 16)	/* turn on root hub ports power */
-#define OHCI_ROOT_OCIC	(1 << 17)	/* Overcurrent indicator change */
-#define OHCI_ROOT_CRWE	(1 << 31)	/* Clear RemoteWakeupEnable */
-
-/*
- * Interrupt register masks
- */
-#define OHCI_INTR_SO	(1)
-#define OHCI_INTR_WDH	(1 << 1)
-#define OHCI_INTR_SF	(1 << 2)
-#define OHCI_INTR_RD	(1 << 3)
-#define OHCI_INTR_UE	(1 << 4)
-#define OHCI_INTR_FNO	(1 << 5)
-#define OHCI_INTR_RHSC	(1 << 6)
-#define OHCI_INTR_OC	(1 << 30)
-#define OHCI_INTR_MIE	(1 << 31)
-
-/*
- * Control register masks
- */
-#define OHCI_USB_OPER		(2 << 6)
-#define OHCI_USB_SUSPEND	(3 << 6)
-#define OHCI_USB_PLE		(1 << 2)  /* Periodic (interrupt) list enable */
-#define OHCI_USB_IE		(1 << 3)  /* Isochronous list enable */
-#define OHCI_USB_CLE		(1 << 4)  /* Control list enable */
-#define OHCI_USB_BLE		(1 << 5)  /* Bulk list enable */
-
-/*
- * Command status register masks
- */
-#define OHCI_CMDSTAT_HCR	(1)
-#define OHCI_CMDSTAT_CLF	(1 << 1)
-#define OHCI_CMDSTAT_BLF	(1 << 2)
-#define OHCI_CMDSTAT_OCR	(1 << 3)
-#define OHCI_CMDSTAT_SOC	(3 << 16)
-
-/*
- * This is the full ohci controller description
- *
- * Note how the "proper" USB information is just
- * a subset of what the full implementation needs. (Linus)
- */
-struct ohci {
-    	int irq;
-	struct ohci_regs *regs;			/* OHCI controller's memory */
-	struct usb_bus *bus;
-	struct ohci_device *root_hub;		/* Root hub & controller */
-	struct list_head interrupt_list;	/* List of interrupt active TDs for this OHCI */
-};
-
-#define OHCI_TIMER
-#define OHCI_TIMER_FREQ	(1)		/* frequency of OHCI status checks */
-
-/* Debugging code */
-void show_ohci_ed(struct ohci_ed *ed);
-void show_ohci_td(struct ohci_td *td);
-void show_ohci_status(struct ohci *ohci);
-void show_ohci_device(struct ohci_device *dev);
-void show_ohci_hcca(struct ohci_hcca *hcca);
-
-#endif
-/* vim:sw=8
- */