ehci.h 26.9 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1 2
/*
 * Copyright (c) 2001-2002 by David Brownell
3
 *
Linus Torvalds's avatar
Linus Torvalds committed
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef __LINUX_EHCI_HCD_H
#define __LINUX_EHCI_HCD_H

/* definitions used for the EHCI driver */

24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
/*
 * __hc32 and __hc16 are "Host Controller" types, they may be equivalent to
 * __leXX (normally) or __beXX (given EHCI_BIG_ENDIAN_DESC), depending on
 * the host controller implementation.
 *
 * To facilitate the strongest possible byte-order checking from "sparse"
 * and so on, we use __leXX unless that's not practical.
 */
#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
typedef __u32 __bitwise __hc32;
typedef __u16 __bitwise __hc16;
#else
#define __hc32	__le32
#define __hc16	__le16
#endif

Linus Torvalds's avatar
Linus Torvalds committed
40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65
/* statistics can be kept for for tuning/monitoring */
struct ehci_stats {
	/* irq usage */
	unsigned long		normal;
	unsigned long		error;
	unsigned long		reclaim;
	unsigned long		lost_iaa;

	/* termination of urbs from core */
	unsigned long		complete;
	unsigned long		unlink;
};

/* ehci_hcd->lock guards shared data against other CPUs:
 *   ehci_hcd:	async, reclaim, periodic (and shadow), ...
 *   usb_host_endpoint: hcpriv
 *   ehci_qh:	qh_next, qtd_list
 *   ehci_qtd:	qtd_list
 *
 * Also, hold this lock when talking to HC registers or
 * when updating hw_* fields in shared qh/qtd/... structures.
 */

#define	EHCI_MAX_ROOT_PORTS	15		/* see HCS_N_PORTS */

struct ehci_hcd {			/* one per controller */
66 67 68 69 70 71
	/* glue to PCI and HCD framework */
	struct ehci_caps __iomem *caps;
	struct ehci_regs __iomem *regs;
	struct ehci_dbg_port __iomem *debug;

	__u32			hcs_params;	/* cached register copy */
Linus Torvalds's avatar
Linus Torvalds committed
72 73 74 75 76 77 78 79 80 81
	spinlock_t		lock;

	/* async schedule support */
	struct ehci_qh		*async;
	struct ehci_qh		*reclaim;
	unsigned		scanning : 1;

	/* periodic schedule support */
#define	DEFAULT_I_TDPS		1024		/* some HCs can do less */
	unsigned		periodic_size;
82
	__hc32			*periodic;	/* hw periodic table */
Linus Torvalds's avatar
Linus Torvalds committed
83 84 85 86 87 88 89 90 91
	dma_addr_t		periodic_dma;
	unsigned		i_thresh;	/* uframes HC might cache */

	union ehci_shadow	*pshadow;	/* mirror hw periodic table */
	int			next_uframe;	/* scan periodic, start here */
	unsigned		periodic_sched;	/* periodic activity count */

	/* per root hub port */
	unsigned long		reset_done [EHCI_MAX_ROOT_PORTS];
92

93 94 95 96 97
	/* bit vectors (one bit per port) */
	unsigned long		bus_suspended;		/* which ports were
			already suspended at the start of a bus suspend */
	unsigned long		companion_ports;	/* which ports are
			dedicated to the companion controller */
98 99
	unsigned long		owned_ports;		/* which ports are
			owned by the companion during a bus suspend */
100 101
	unsigned long		port_c_suspend;		/* which ports have
			the change-suspend feature turned on */
Linus Torvalds's avatar
Linus Torvalds committed
102 103 104 105 106 107 108

	/* per-HC memory pools (could be per-bus, but ...) */
	struct dma_pool		*qh_pool;	/* qh per active urb */
	struct dma_pool		*qtd_pool;	/* one or more per qh */
	struct dma_pool		*itd_pool;	/* itd per iso urb */
	struct dma_pool		*sitd_pool;	/* sitd per split iso urb */

109
	struct timer_list	iaa_watchdog;
Linus Torvalds's avatar
Linus Torvalds committed
110 111 112 113 114 115
	struct timer_list	watchdog;
	unsigned long		actions;
	unsigned		stamp;
	unsigned long		next_statechange;
	u32			command;

116
	/* SILICON QUIRKS */
117
	unsigned		no_selective_suspend:1;
118
	unsigned		has_fsl_port_bug:1; /* FreeScale */
119
	unsigned		big_endian_mmio:1;
120
	unsigned		big_endian_desc:1;
121

122
	u8			sbrn;		/* packed release number */
Linus Torvalds's avatar
Linus Torvalds committed
123 124 125 126 127 128 129

	/* irq statistics */
#ifdef EHCI_STATS
	struct ehci_stats	stats;
#	define COUNT(x) do { (x)++; } while (0)
#else
#	define COUNT(x) do {} while (0)
130 131 132 133 134 135 136 137
#endif

	/* debug files */
#ifdef DEBUG
	struct dentry		*debug_dir;
	struct dentry		*debug_async;
	struct dentry		*debug_periodic;
	struct dentry		*debug_registers;
Linus Torvalds's avatar
Linus Torvalds committed
138 139 140
#endif
};

141
/* convert between an HCD pointer and the corresponding EHCI_HCD */
Linus Torvalds's avatar
Linus Torvalds committed
142 143 144 145 146 147 148 149 150 151
static inline struct ehci_hcd *hcd_to_ehci (struct usb_hcd *hcd)
{
	return (struct ehci_hcd *) (hcd->hcd_priv);
}
static inline struct usb_hcd *ehci_to_hcd (struct ehci_hcd *ehci)
{
	return container_of ((void *) ehci, struct usb_hcd, hcd_priv);
}


152 153 154 155 156 157 158 159 160 161 162 163 164
static inline void
iaa_watchdog_start(struct ehci_hcd *ehci)
{
	WARN_ON(timer_pending(&ehci->iaa_watchdog));
	mod_timer(&ehci->iaa_watchdog,
			jiffies + msecs_to_jiffies(EHCI_IAA_MSECS));
}

static inline void iaa_watchdog_done(struct ehci_hcd *ehci)
{
	del_timer(&ehci->iaa_watchdog);
}

Linus Torvalds's avatar
Linus Torvalds committed
165 166 167 168 169 170 171 172 173 174 175 176 177 178 179
enum ehci_timer_action {
	TIMER_IO_WATCHDOG,
	TIMER_ASYNC_SHRINK,
	TIMER_ASYNC_OFF,
};

static inline void
timer_action_done (struct ehci_hcd *ehci, enum ehci_timer_action action)
{
	clear_bit (action, &ehci->actions);
}

static inline void
timer_action (struct ehci_hcd *ehci, enum ehci_timer_action action)
{
180 181 182 183 184 185 186 187 188
	/* Don't override timeouts which shrink or (later) disable
	 * the async ring; just the I/O watchdog.  Note that if a
	 * SHRINK were pending, OFF would never be requested.
	 */
	if (timer_pending(&ehci->watchdog)
			&& ((BIT(TIMER_ASYNC_SHRINK) | BIT(TIMER_ASYNC_OFF))
				& ehci->actions))
		return;

Linus Torvalds's avatar
Linus Torvalds committed
189 190 191 192 193 194 195 196 197 198 199 200 201 202 203
	if (!test_and_set_bit (action, &ehci->actions)) {
		unsigned long t;

		switch (action) {
		case TIMER_IO_WATCHDOG:
			t = EHCI_IO_JIFFIES;
			break;
		case TIMER_ASYNC_OFF:
			t = EHCI_ASYNC_JIFFIES;
			break;
		// case TIMER_ASYNC_SHRINK:
		default:
			t = EHCI_SHRINK_JIFFIES;
			break;
		}
204
		mod_timer(&ehci->watchdog, t + jiffies);
Linus Torvalds's avatar
Linus Torvalds committed
205 206 207 208 209 210 211 212 213 214 215 216
	}
}

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

/* EHCI register interface, corresponds to EHCI Revision 0.95 specification */

/* Section 2.2 Host Controller Capability Registers */
struct ehci_caps {
	/* these fields are specified as 8 and 16 bit registers,
	 * but some hosts can't perform 8 or 16 bit PCI accesses.
	 */
217
	u32		hc_capbase;
Linus Torvalds's avatar
Linus Torvalds committed
218 219 220 221 222 223 224
#define HC_LENGTH(p)		(((p)>>00)&0x00ff)	/* bits 7:0 */
#define HC_VERSION(p)		(((p)>>16)&0xffff)	/* bits 31:16 */
	u32		hcs_params;     /* HCSPARAMS - offset 0x4 */
#define HCS_DEBUG_PORT(p)	(((p)>>20)&0xf)	/* bits 23:20, debug port? */
#define HCS_INDICATOR(p)	((p)&(1 << 16))	/* true: has port indicators */
#define HCS_N_CC(p)		(((p)>>12)&0xf)	/* bits 15:12, #companion HCs */
#define HCS_N_PCC(p)		(((p)>>8)&0xf)	/* bits 11:8, ports per CC */
225 226
#define HCS_PORTROUTED(p)	((p)&(1 << 7))	/* true: port routing */
#define HCS_PPC(p)		((p)&(1 << 4))	/* true: port power control */
Linus Torvalds's avatar
Linus Torvalds committed
227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250
#define HCS_N_PORTS(p)		(((p)>>0)&0xf)	/* bits 3:0, ports on HC */

	u32		hcc_params;      /* HCCPARAMS - offset 0x8 */
#define HCC_EXT_CAPS(p)		(((p)>>8)&0xff)	/* for pci extended caps */
#define HCC_ISOC_CACHE(p)       ((p)&(1 << 7))  /* true: can cache isoc frame */
#define HCC_ISOC_THRES(p)       (((p)>>4)&0x7)  /* bits 6:4, uframes cached */
#define HCC_CANPARK(p)		((p)&(1 << 2))  /* true: can park on async qh */
#define HCC_PGM_FRAMELISTLEN(p) ((p)&(1 << 1))  /* true: periodic_size changes*/
#define HCC_64BIT_ADDR(p)       ((p)&(1))       /* true: can use 64-bit addr */
	u8		portroute [8];	 /* nibbles for routing - offset 0xC */
} __attribute__ ((packed));


/* Section 2.3 Host Controller Operational Registers */
struct ehci_regs {

	/* USBCMD: offset 0x00 */
	u32		command;
/* 23:16 is r/w intr rate, in microframes; default "8" == 1/msec */
#define CMD_PARK	(1<<11)		/* enable "park" on async qh */
#define CMD_PARK_CNT(c)	(((c)>>8)&3)	/* how many transfers to park for */
#define CMD_LRESET	(1<<7)		/* partial reset (no ports, etc) */
#define CMD_IAAD	(1<<6)		/* "doorbell" interrupt async advance */
#define CMD_ASE		(1<<5)		/* async schedule enable */
251
#define CMD_PSE		(1<<4)		/* periodic schedule enable */
Linus Torvalds's avatar
Linus Torvalds committed
252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276
/* 3:2 is periodic frame list size */
#define CMD_RESET	(1<<1)		/* reset HC not bus */
#define CMD_RUN		(1<<0)		/* start/stop HC */

	/* USBSTS: offset 0x04 */
	u32		status;
#define STS_ASS		(1<<15)		/* Async Schedule Status */
#define STS_PSS		(1<<14)		/* Periodic Schedule Status */
#define STS_RECL	(1<<13)		/* Reclamation */
#define STS_HALT	(1<<12)		/* Not running (any reason) */
/* some bits reserved */
	/* these STS_* flags are also intr_enable bits (USBINTR) */
#define STS_IAA		(1<<5)		/* Interrupted on async advance */
#define STS_FATAL	(1<<4)		/* such as some PCI access errors */
#define STS_FLR		(1<<3)		/* frame list rolled over */
#define STS_PCD		(1<<2)		/* port change detect */
#define STS_ERR		(1<<1)		/* "error" completion (overflow, ...) */
#define STS_INT		(1<<0)		/* "normal" completion (short, ...) */

	/* USBINTR: offset 0x08 */
	u32		intr_enable;

	/* FRINDEX: offset 0x0C */
	u32		frame_index;	/* current microframe number */
	/* CTRLDSSEGMENT: offset 0x10 */
277
	u32		segment;	/* address bits 63:32 if needed */
Linus Torvalds's avatar
Linus Torvalds committed
278
	/* PERIODICLISTBASE: offset 0x14 */
279
	u32		frame_list;	/* points to periodic list */
Linus Torvalds's avatar
Linus Torvalds committed
280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313
	/* ASYNCLISTADDR: offset 0x18 */
	u32		async_next;	/* address of next async queue head */

	u32		reserved [9];

	/* CONFIGFLAG: offset 0x40 */
	u32		configured_flag;
#define FLAG_CF		(1<<0)		/* true: we'll support "high speed" */

	/* PORTSC: offset 0x44 */
	u32		port_status [0];	/* up to N_PORTS */
/* 31:23 reserved */
#define PORT_WKOC_E	(1<<22)		/* wake on overcurrent (enable) */
#define PORT_WKDISC_E	(1<<21)		/* wake on disconnect (enable) */
#define PORT_WKCONN_E	(1<<20)		/* wake on connect (enable) */
/* 19:16 for port testing */
#define PORT_LED_OFF	(0<<14)
#define PORT_LED_AMBER	(1<<14)
#define PORT_LED_GREEN	(2<<14)
#define PORT_LED_MASK	(3<<14)
#define PORT_OWNER	(1<<13)		/* true: companion hc owns this port */
#define PORT_POWER	(1<<12)		/* true: has power (see PPC) */
#define PORT_USB11(x) (((x)&(3<<10))==(1<<10))	/* USB 1.1 device */
/* 11:10 for detecting lowspeed devices (reset vs release ownership) */
/* 9 reserved */
#define PORT_RESET	(1<<8)		/* reset port */
#define PORT_SUSPEND	(1<<7)		/* suspend port */
#define PORT_RESUME	(1<<6)		/* resume it */
#define PORT_OCC	(1<<5)		/* over current change */
#define PORT_OC		(1<<4)		/* over current active */
#define PORT_PEC	(1<<3)		/* port enable change */
#define PORT_PE		(1<<2)		/* port enable */
#define PORT_CSC	(1<<1)		/* connect status change */
#define PORT_CONNECT	(1<<0)		/* device connected */
314
#define PORT_RWC_BITS   (PORT_CSC | PORT_PEC | PORT_OCC)
Linus Torvalds's avatar
Linus Torvalds committed
315 316
} __attribute__ ((packed));

317 318 319 320 321 322
#define USBMODE		0x68		/* USB Device mode */
#define USBMODE_SDIS	(1<<3)		/* Stream disable */
#define USBMODE_BE	(1<<2)		/* BE/LE endianness select */
#define USBMODE_CM_HC	(3<<0)		/* host controller mode */
#define USBMODE_CM_IDLE	(0<<0)		/* idle state */

Linus Torvalds's avatar
Linus Torvalds committed
323 324 325 326 327 328 329 330 331
/* Appendix C, Debug port ... intended for use with special "debug devices"
 * that can help if there's no serial console.  (nonstandard enumeration.)
 */
struct ehci_dbg_port {
	u32	control;
#define DBGP_OWNER	(1<<30)
#define DBGP_ENABLED	(1<<28)
#define DBGP_DONE	(1<<16)
#define DBGP_INUSE	(1<<10)
332
#define DBGP_ERRCODE(x)	(((x)>>7)&0x07)
Linus Torvalds's avatar
Linus Torvalds committed
333 334 335 336 337 338 339 340
#	define DBGP_ERR_BAD	1
#	define DBGP_ERR_SIGNAL	2
#define DBGP_ERROR	(1<<6)
#define DBGP_GO		(1<<5)
#define DBGP_OUT	(1<<4)
#define DBGP_LEN(x)	(((x)>>0)&0x0f)
	u32	pids;
#define DBGP_PID_GET(x)		(((x)>>16)&0xff)
341
#define DBGP_PID_SET(data,tok)	(((data)<<8)|(tok))
Linus Torvalds's avatar
Linus Torvalds committed
342 343 344
	u32	data03;
	u32	data47;
	u32	address;
345
#define DBGP_EPADDR(dev,ep)	(((dev)<<8)|(ep))
Linus Torvalds's avatar
Linus Torvalds committed
346 347 348 349
} __attribute__ ((packed));

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

350
#define	QTD_NEXT(ehci, dma)	cpu_to_hc32(ehci, (u32)dma)
Linus Torvalds's avatar
Linus Torvalds committed
351 352 353

/*
 * EHCI Specification 0.95 Section 3.5
354
 * QTD: describe data transfer components (buffer, direction, ...)
Linus Torvalds's avatar
Linus Torvalds committed
355 356 357 358 359 360 361
 * See Fig 3-6 "Queue Element Transfer Descriptor Block Diagram".
 *
 * These are associated only with "QH" (Queue Head) structures,
 * used with control, bulk, and interrupt transfers.
 */
struct ehci_qtd {
	/* first part defined by EHCI spec */
362 363 364
	__hc32			hw_next;	/* see EHCI 3.5.1 */
	__hc32			hw_alt_next;    /* see EHCI 3.5.2 */
	__hc32			hw_token;       /* see EHCI 3.5.3 */
Linus Torvalds's avatar
Linus Torvalds committed
365 366 367 368 369 370 371 372 373 374 375 376 377
#define	QTD_TOGGLE	(1 << 31)	/* data toggle */
#define	QTD_LENGTH(tok)	(((tok)>>16) & 0x7fff)
#define	QTD_IOC		(1 << 15)	/* interrupt on complete */
#define	QTD_CERR(tok)	(((tok)>>10) & 0x3)
#define	QTD_PID(tok)	(((tok)>>8) & 0x3)
#define	QTD_STS_ACTIVE	(1 << 7)	/* HC may execute this */
#define	QTD_STS_HALT	(1 << 6)	/* halted on error */
#define	QTD_STS_DBE	(1 << 5)	/* data buffer error (in HC) */
#define	QTD_STS_BABBLE	(1 << 4)	/* device was babbling (qtd halted) */
#define	QTD_STS_XACT	(1 << 3)	/* device gave illegal response */
#define	QTD_STS_MMF	(1 << 2)	/* incomplete split transaction */
#define	QTD_STS_STS	(1 << 1)	/* split transaction state */
#define	QTD_STS_PING	(1 << 0)	/* issue PING? */
378 379 380 381 382 383 384

#define ACTIVE_BIT(ehci)	cpu_to_hc32(ehci, QTD_STS_ACTIVE)
#define HALT_BIT(ehci)		cpu_to_hc32(ehci, QTD_STS_HALT)
#define STATUS_BIT(ehci)	cpu_to_hc32(ehci, QTD_STS_STS)

	__hc32			hw_buf [5];        /* see EHCI 3.5.4 */
	__hc32			hw_buf_hi [5];        /* Appendix B */
Linus Torvalds's avatar
Linus Torvalds committed
385 386 387 388 389 390 391 392 393

	/* the rest is HCD-private */
	dma_addr_t		qtd_dma;		/* qtd address */
	struct list_head	qtd_list;		/* sw qtd list */
	struct urb		*urb;			/* qtd's urb */
	size_t			length;			/* length of buffer */
} __attribute__ ((aligned (32)));

/* mask NakCnt+T in qh->hw_alt_next */
394
#define QTD_MASK(ehci)	cpu_to_hc32 (ehci, ~0x1f)
Linus Torvalds's avatar
Linus Torvalds committed
395 396 397 398 399 400

#define IS_SHORT_READ(token) (QTD_LENGTH (token) != 0 && QTD_PID (token) == 1)

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

/* type tag from {qh,itd,sitd,fstn}->hw_next */
401
#define Q_NEXT_TYPE(ehci,dma)	((dma) & cpu_to_hc32(ehci, 3 << 1))
Linus Torvalds's avatar
Linus Torvalds committed
402

403 404 405 406 407 408 409
/*
 * Now the following defines are not converted using the
 * __constant_cpu_to_le32() macro anymore, since we have to support
 * "dynamic" switching between be and le support, so that the driver
 * can be used on one system with SoC EHCI controller using big-endian
 * descriptors as well as a normal little-endian PCI EHCI controller.
 */
Linus Torvalds's avatar
Linus Torvalds committed
410
/* values for that type tag */
411 412 413 414
#define Q_TYPE_ITD	(0 << 1)
#define Q_TYPE_QH	(1 << 1)
#define Q_TYPE_SITD	(2 << 1)
#define Q_TYPE_FSTN	(3 << 1)
Linus Torvalds's avatar
Linus Torvalds committed
415 416

/* next async queue entry, or pointer to interrupt/periodic QH */
417
#define QH_NEXT(ehci,dma)	(cpu_to_hc32(ehci, (((u32)dma)&~0x01f)|Q_TYPE_QH))
Linus Torvalds's avatar
Linus Torvalds committed
418 419

/* for periodic/async schedules and qtd lists, mark end of list */
420
#define EHCI_LIST_END(ehci)	cpu_to_hc32(ehci, 1) /* "null pointer" to hw */
Linus Torvalds's avatar
Linus Torvalds committed
421 422 423 424 425 426 427 428 429 430

/*
 * Entries in periodic shadow table are pointers to one of four kinds
 * of data structure.  That's dictated by the hardware; a type tag is
 * encoded in the low bits of the hardware's periodic schedule.  Use
 * Q_NEXT_TYPE to get the tag.
 *
 * For entries in the async schedule, the type tag always says "qh".
 */
union ehci_shadow {
431
	struct ehci_qh		*qh;		/* Q_TYPE_QH */
Linus Torvalds's avatar
Linus Torvalds committed
432 433 434
	struct ehci_itd		*itd;		/* Q_TYPE_ITD */
	struct ehci_sitd	*sitd;		/* Q_TYPE_SITD */
	struct ehci_fstn	*fstn;		/* Q_TYPE_FSTN */
435
	__hc32			*hw_next;	/* (all types) */
Linus Torvalds's avatar
Linus Torvalds committed
436 437 438 439 440 441 442 443 444 445 446 447 448 449 450
	void			*ptr;
};

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

/*
 * EHCI Specification 0.95 Section 3.6
 * QH: describes control/bulk/interrupt endpoints
 * See Fig 3-7 "Queue Head Structure Layout".
 *
 * These appear in both the async and (for interrupt) periodic schedules.
 */

struct ehci_qh {
	/* first part defined by EHCI spec */
451 452
	__hc32			hw_next;	/* see EHCI 3.6.1 */
	__hc32			hw_info1;       /* see EHCI 3.6.2 */
Linus Torvalds's avatar
Linus Torvalds committed
453
#define	QH_HEAD		0x00008000
454
	__hc32			hw_info2;        /* see EHCI 3.6.2 */
455 456 457 458 459
#define	QH_SMASK	0x000000ff
#define	QH_CMASK	0x0000ff00
#define	QH_HUBADDR	0x007f0000
#define	QH_HUBPORT	0x3f800000
#define	QH_MULT		0xc0000000
460
	__hc32			hw_current;	/* qtd list - see EHCI 3.6.4 */
461

Linus Torvalds's avatar
Linus Torvalds committed
462
	/* qtd overlay (hardware parts of a struct ehci_qtd) */
463 464 465 466 467
	__hc32			hw_qtd_next;
	__hc32			hw_alt_next;
	__hc32			hw_token;
	__hc32			hw_buf [5];
	__hc32			hw_buf_hi [5];
Linus Torvalds's avatar
Linus Torvalds committed
468 469 470 471 472 473 474 475 476

	/* the rest is HCD-private */
	dma_addr_t		qh_dma;		/* address of qh */
	union ehci_shadow	qh_next;	/* ptr to qh; or periodic */
	struct list_head	qtd_list;	/* sw qtd list */
	struct ehci_qtd		*dummy;
	struct ehci_qh		*reclaim;	/* next to reclaim */

	struct ehci_hcd		*ehci;
477 478 479 480 481 482 483 484

	/*
	 * Do NOT use atomic operations for QH refcounting. On some CPUs
	 * (PPC7448 for example), atomic operations cannot be performed on
	 * memory that is cache-inhibited (i.e. being used for DMA).
	 * Spinlocks are used to protect all QH fields.
	 */
	u32			refcount;
Linus Torvalds's avatar
Linus Torvalds committed
485 486 487 488 489 490 491 492 493 494 495 496 497
	unsigned		stamp;

	u8			qh_state;
#define	QH_STATE_LINKED		1		/* HC sees this */
#define	QH_STATE_UNLINK		2		/* HC may still see this */
#define	QH_STATE_IDLE		3		/* HC doesn't see this */
#define	QH_STATE_UNLINK_WAIT	4		/* LINKED and on reclaim q */
#define	QH_STATE_COMPLETING	5		/* don't touch token.HALT */

	/* periodic schedule info */
	u8			usecs;		/* intr bandwidth */
	u8			gap_uf;		/* uframes split/csplit gap */
	u8			c_usecs;	/* ... split completion bw */
498
	u16			tt_usecs;	/* tt downstream bandwidth */
Linus Torvalds's avatar
Linus Torvalds committed
499 500 501 502 503 504 505 506 507 508 509 510
	unsigned short		period;		/* polling interval */
	unsigned short		start;		/* where polling starts */
#define NO_FRAME ((unsigned short)~0)			/* pick new start */
	struct usb_device	*dev;		/* access to TT */
} __attribute__ ((aligned (32)));

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

/* description of one iso transaction (up to 3 KB data if highspeed) */
struct ehci_iso_packet {
	/* These will be copied to iTD when scheduling */
	u64			bufp;		/* itd->hw_bufp{,_hi}[pg] |= */
511
	__hc32			transaction;	/* itd->hw_transaction[i] |= */
Linus Torvalds's avatar
Linus Torvalds committed
512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532
	u8			cross;		/* buf crosses pages */
	/* for full speed OUT splits */
	u32			buf1;
};

/* temporary schedule data for packets from iso urbs (both speeds)
 * each packet is one logical usb transaction to the device (not TT),
 * beginning at stream->next_uframe
 */
struct ehci_iso_sched {
	struct list_head	td_list;
	unsigned		span;
	struct ehci_iso_packet	packet [0];
};

/*
 * ehci_iso_stream - groups all (s)itds for this endpoint.
 * acts like a qh would, if EHCI had them for ISO.
 */
struct ehci_iso_stream {
	/* first two fields match QH, but info1 == 0 */
533 534
	__hc32			hw_next;
	__hc32			hw_info1;
Linus Torvalds's avatar
Linus Torvalds committed
535 536 537 538 539 540 541 542

	u32			refcount;
	u8			bEndpointAddress;
	u8			highspeed;
	u16			depth;		/* depth in uframes */
	struct list_head	td_list;	/* queued itds/sitds */
	struct list_head	free_list;	/* list of unused itds/sitds */
	struct usb_device	*udev;
543
	struct usb_host_endpoint *ep;
Linus Torvalds's avatar
Linus Torvalds committed
544 545 546 547 548

	/* output of (re)scheduling */
	unsigned long		start;		/* jiffies */
	unsigned long		rescheduled;
	int			next_uframe;
549
	__hc32			splits;
Linus Torvalds's avatar
Linus Torvalds committed
550 551 552 553 554 555

	/* the rest is derived from the endpoint descriptor,
	 * trusting urb->interval == f(epdesc->bInterval) and
	 * including the extra info for hw_bufp[0..2]
	 */
	u8			usecs, c_usecs;
556
	u16			interval;
557
	u16			tt_usecs;
Linus Torvalds's avatar
Linus Torvalds committed
558 559 560 561 562
	u16			maxp;
	u16			raw_mask;
	unsigned		bandwidth;

	/* This is used to initialize iTD's hw_bufp fields */
563 564 565
	__hc32			buf0;
	__hc32			buf1;
	__hc32			buf2;
Linus Torvalds's avatar
Linus Torvalds committed
566 567

	/* this is used to initialize sITD's tt info */
568
	__hc32			address;
Linus Torvalds's avatar
Linus Torvalds committed
569 570 571 572 573 574 575 576 577 578 579 580
};

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

/*
 * EHCI Specification 0.95 Section 3.3
 * Fig 3-4 "Isochronous Transaction Descriptor (iTD)"
 *
 * Schedule records for high speed iso xfers
 */
struct ehci_itd {
	/* first part defined by EHCI spec */
581 582
	__hc32			hw_next;           /* see EHCI 3.3.1 */
	__hc32			hw_transaction [8]; /* see EHCI 3.3.2 */
Linus Torvalds's avatar
Linus Torvalds committed
583 584 585 586 587 588 589
#define EHCI_ISOC_ACTIVE        (1<<31)        /* activate transfer this slot */
#define EHCI_ISOC_BUF_ERR       (1<<30)        /* Data buffer error */
#define EHCI_ISOC_BABBLE        (1<<29)        /* babble detected */
#define EHCI_ISOC_XACTERR       (1<<28)        /* XactErr - transaction error */
#define	EHCI_ITD_LENGTH(tok)	(((tok)>>16) & 0x0fff)
#define	EHCI_ITD_IOC		(1 << 15)	/* interrupt on complete */

590
#define ITD_ACTIVE(ehci)	cpu_to_hc32(ehci, EHCI_ISOC_ACTIVE)
Linus Torvalds's avatar
Linus Torvalds committed
591

592 593
	__hc32			hw_bufp [7];	/* see EHCI 3.3.3 */
	__hc32			hw_bufp_hi [7];	/* Appendix B */
Linus Torvalds's avatar
Linus Torvalds committed
594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611

	/* the rest is HCD-private */
	dma_addr_t		itd_dma;	/* for this itd */
	union ehci_shadow	itd_next;	/* ptr to periodic q entry */

	struct urb		*urb;
	struct ehci_iso_stream	*stream;	/* endpoint's queue */
	struct list_head	itd_list;	/* list of stream's itds */

	/* any/all hw_transactions here may be used by that urb */
	unsigned		frame;		/* where scheduled */
	unsigned		pg;
	unsigned		index[8];	/* in urb->iso_frame_desc */
} __attribute__ ((aligned (32)));

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

/*
612
 * EHCI Specification 0.95 Section 3.4
Linus Torvalds's avatar
Linus Torvalds committed
613 614 615 616 617 618
 * siTD, aka split-transaction isochronous Transfer Descriptor
 *       ... describe full speed iso xfers through TT in hubs
 * see Figure 3-5 "Split-transaction Isochronous Transaction Descriptor (siTD)
 */
struct ehci_sitd {
	/* first part defined by EHCI spec */
619
	__hc32			hw_next;
Linus Torvalds's avatar
Linus Torvalds committed
620
/* uses bit field macros above - see EHCI 0.95 Table 3-8 */
621 622 623
	__hc32			hw_fullspeed_ep;	/* EHCI table 3-9 */
	__hc32			hw_uframe;		/* EHCI table 3-10 */
	__hc32			hw_results;		/* EHCI table 3-11 */
Linus Torvalds's avatar
Linus Torvalds committed
624 625 626 627 628 629 630 631 632 633 634
#define	SITD_IOC	(1 << 31)	/* interrupt on completion */
#define	SITD_PAGE	(1 << 30)	/* buffer 0/1 */
#define	SITD_LENGTH(x)	(0x3ff & ((x)>>16))
#define	SITD_STS_ACTIVE	(1 << 7)	/* HC may execute this */
#define	SITD_STS_ERR	(1 << 6)	/* error from TT */
#define	SITD_STS_DBE	(1 << 5)	/* data buffer error (in HC) */
#define	SITD_STS_BABBLE	(1 << 4)	/* device was babbling */
#define	SITD_STS_XACT	(1 << 3)	/* illegal IN response */
#define	SITD_STS_MMF	(1 << 2)	/* incomplete split transaction */
#define	SITD_STS_STS	(1 << 1)	/* split transaction state */

635
#define SITD_ACTIVE(ehci)	cpu_to_hc32(ehci, SITD_STS_ACTIVE)
Linus Torvalds's avatar
Linus Torvalds committed
636

637 638 639
	__hc32			hw_buf [2];		/* EHCI table 3-12 */
	__hc32			hw_backpointer;		/* EHCI table 3-13 */
	__hc32			hw_buf_hi [2];		/* Appendix B */
Linus Torvalds's avatar
Linus Torvalds committed
640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663

	/* the rest is HCD-private */
	dma_addr_t		sitd_dma;
	union ehci_shadow	sitd_next;	/* ptr to periodic q entry */

	struct urb		*urb;
	struct ehci_iso_stream	*stream;	/* endpoint's queue */
	struct list_head	sitd_list;	/* list of stream's sitds */
	unsigned		frame;
	unsigned		index;
} __attribute__ ((aligned (32)));

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

/*
 * EHCI Specification 0.96 Section 3.7
 * Periodic Frame Span Traversal Node (FSTN)
 *
 * Manages split interrupt transactions (using TT) that span frame boundaries
 * into uframes 0/1; see 4.12.2.2.  In those uframes, a "save place" FSTN
 * makes the HC jump (back) to a QH to scan for fs/ls QH completions until
 * it hits a "restore" FSTN; then it returns to finish other uframe 0/1 work.
 */
struct ehci_fstn {
664 665
	__hc32			hw_next;	/* any periodic q entry */
	__hc32			hw_prev;	/* qh or EHCI_LIST_END */
Linus Torvalds's avatar
Linus Torvalds committed
666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682

	/* the rest is HCD-private */
	dma_addr_t		fstn_dma;
	union ehci_shadow	fstn_next;	/* ptr to periodic q entry */
} __attribute__ ((aligned (32)));

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

#ifdef CONFIG_USB_EHCI_ROOT_HUB_TT

/*
 * Some EHCI controllers have a Transaction Translator built into the
 * root hub. This is a non-standard feature.  Each controller will need
 * to add code to the following inline functions, and call them as
 * needed (mostly in root hub code).
 */

683
#define	ehci_is_TDI(e)			(ehci_to_hcd(e)->has_tt)
Linus Torvalds's avatar
Linus Torvalds committed
684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709

/* Returns the speed of a device attached to a port on the root hub. */
static inline unsigned int
ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc)
{
	if (ehci_is_TDI(ehci)) {
		switch ((portsc>>26)&3) {
		case 0:
			return 0;
		case 1:
			return (1<<USB_PORT_FEAT_LOWSPEED);
		case 2:
		default:
			return (1<<USB_PORT_FEAT_HIGHSPEED);
		}
	}
	return (1<<USB_PORT_FEAT_HIGHSPEED);
}

#else

#define	ehci_is_TDI(e)			(0)

#define	ehci_port_speed(ehci, portsc)	(1<<USB_PORT_FEAT_HIGHSPEED)
#endif

710 711 712 713 714 715 716 717 718 719 720
/*-------------------------------------------------------------------------*/

#ifdef CONFIG_PPC_83xx
/* Some Freescale processors have an erratum in which the TT
 * port number in the queue head was 0..N-1 instead of 1..N.
 */
#define	ehci_has_fsl_portno_bug(e)		((e)->has_fsl_port_bug)
#else
#define	ehci_has_fsl_portno_bug(e)		(0)
#endif

721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736
/*
 * While most USB host controllers implement their registers in
 * little-endian format, a minority (celleb companion chip) implement
 * them in big endian format.
 *
 * This attempts to support either format at compile time without a
 * runtime penalty, or both formats with the additional overhead
 * of checking a flag bit.
 */

#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
#define ehci_big_endian_mmio(e)		((e)->big_endian_mmio)
#else
#define ehci_big_endian_mmio(e)		0
#endif

737 738 739 740 741 742 743 744
/*
 * Big-endian read/write functions are arch-specific.
 * Other arches can be added if/when they're needed.
 *
 * REVISIT: arch/powerpc now has readl/writel_be, so the
 * definition below can die once the 4xx support is
 * finally ported over.
 */
745
#if defined(CONFIG_PPC) && !defined(CONFIG_PPC_MERGE)
746 747 748 749
#define readl_be(addr)		in_be32((__force unsigned *)addr)
#define writel_be(val, addr)	out_be32((__force unsigned *)addr, val)
#endif

750 751 752 753 754
#if defined(CONFIG_ARM) && defined(CONFIG_ARCH_IXP4XX)
#define readl_be(addr)		__raw_readl((__force unsigned *)addr)
#define writel_be(val, addr)	__raw_writel(val, (__force unsigned *)addr)
#endif

755 756
static inline unsigned int ehci_readl(const struct ehci_hcd *ehci,
		__u32 __iomem * regs)
757
{
758
#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
759
	return ehci_big_endian_mmio(ehci) ?
760 761
		readl_be(regs) :
		readl(regs);
762
#else
763
	return readl(regs);
764
#endif
765 766
}

767 768
static inline void ehci_writel(const struct ehci_hcd *ehci,
		const unsigned int val, __u32 __iomem *regs)
769
{
770
#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
771
	ehci_big_endian_mmio(ehci) ?
772 773
		writel_be(val, regs) :
		writel(val, regs);
774
#else
775
	writel(val, regs);
776
#endif
777
}
778

Linus Torvalds's avatar
Linus Torvalds committed
779 780
/*-------------------------------------------------------------------------*/

781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836
/*
 * The AMCC 440EPx not only implements its EHCI registers in big-endian
 * format, but also its DMA data structures (descriptors).
 *
 * EHCI controllers accessed through PCI work normally (little-endian
 * everywhere), so we won't bother supporting a BE-only mode for now.
 */
#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
#define ehci_big_endian_desc(e)		((e)->big_endian_desc)

/* cpu to ehci */
static inline __hc32 cpu_to_hc32 (const struct ehci_hcd *ehci, const u32 x)
{
	return ehci_big_endian_desc(ehci)
		? (__force __hc32)cpu_to_be32(x)
		: (__force __hc32)cpu_to_le32(x);
}

/* ehci to cpu */
static inline u32 hc32_to_cpu (const struct ehci_hcd *ehci, const __hc32 x)
{
	return ehci_big_endian_desc(ehci)
		? be32_to_cpu((__force __be32)x)
		: le32_to_cpu((__force __le32)x);
}

static inline u32 hc32_to_cpup (const struct ehci_hcd *ehci, const __hc32 *x)
{
	return ehci_big_endian_desc(ehci)
		? be32_to_cpup((__force __be32 *)x)
		: le32_to_cpup((__force __le32 *)x);
}

#else

/* cpu to ehci */
static inline __hc32 cpu_to_hc32 (const struct ehci_hcd *ehci, const u32 x)
{
	return cpu_to_le32(x);
}

/* ehci to cpu */
static inline u32 hc32_to_cpu (const struct ehci_hcd *ehci, const __hc32 x)
{
	return le32_to_cpu(x);
}

static inline u32 hc32_to_cpup (const struct ehci_hcd *ehci, const __hc32 *x)
{
	return le32_to_cpup(x);
}

#endif

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

Linus Torvalds's avatar
Linus Torvalds committed
837 838 839 840 841 842 843
#ifndef DEBUG
#define STUB_DEBUG_FILES
#endif	/* DEBUG */

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

#endif /* __LINUX_EHCI_HCD_H */