Release 4.17 drivers/usb/gadget/udc/pxa25x_udc.h

// SPDX-License-Identifier: GPL-2.0+
/*
 * Intel PXA25x on-chip full speed USB device controller
 *
 * Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>, Pengutronix
 * Copyright (C) 2003 David Brownell
 */

#ifndef __LINUX_USB_GADGET_PXA25X_H

#define __LINUX_USB_GADGET_PXA25X_H

#include <linux/types.h>

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

/* pxa25x has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */

#define UFNRH_SIR	(1 << 7)	
/* SOF interrupt request */

#define UFNRH_SIM	(1 << 6)	
/* SOF interrupt mask */

#define UFNRH_IPE14	(1 << 5)	
/* ISO packet error, ep14 */

#define UFNRH_IPE9	(1 << 4)	
/* ISO packet error, ep9 */

#define UFNRH_IPE4	(1 << 3)	
/* ISO packet error, ep4 */

/* pxa255 has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */

#define	UDCCFR		UDC_RES2	
/* UDC Control Function Register */

#define UDCCFR_AREN	(1 << 7)	
/* ACK response enable (now) */

#define UDCCFR_ACM	(1 << 2)	
/* ACK control mode (wait for AREN) */

/* latest pxa255 errata define new "must be one" bits in UDCCFR */

#define	UDCCFR_MB1	(0xff & ~(UDCCFR_AREN|UDCCFR_ACM))

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

struct pxa25x_udc;


struct pxa25x_ep {
	
struct usb_ep				ep;
	
struct pxa25x_udc			*dev;

	
struct list_head			queue;
	
unsigned long				pio_irqs;

	
unsigned short				fifo_size;
	
u8					bEndpointAddress;
	
u8					bmAttributes;

	
unsigned				stopped : 1;
	
unsigned				dma_fixup : 1;

	/* UDCCS = UDC Control/Status for this EP
         * UBCR = UDC Byte Count Remaining (contents of OUT fifo)
         * UDDR = UDC Endpoint Data Register (the fifo)
         * DRCM = DMA Request Channel Map
         */
	
u32					regoff_udccs;
	
u32					regoff_ubcr;
	
u32					regoff_uddr;
};


struct pxa25x_request {
	
struct usb_request			req;
	
struct list_head			queue;
};


enum ep0_state {
	
EP0_IDLE,
	
EP0_IN_DATA_PHASE,
	
EP0_OUT_DATA_PHASE,
	
EP0_END_XFER,
	
EP0_STALL,
};


#define EP0_FIFO_SIZE	((unsigned)16)

#define BULK_FIFO_SIZE	((unsigned)64)

#define ISO_FIFO_SIZE	((unsigned)256)

#define INT_FIFO_SIZE	((unsigned)8)


struct udc_stats {
	
struct ep0stats {
		
unsigned long		ops;
		
unsigned long		bytes;
	

} read, write;
	
unsigned long			irqs;
};

#ifdef CONFIG_USB_PXA25X_SMALL
/* when memory's tight, SMALL config saves code+data.  */

#define	PXA_UDC_NUM_ENDPOINTS	3
#endif

#ifndef	PXA_UDC_NUM_ENDPOINTS

#define	PXA_UDC_NUM_ENDPOINTS	16
#endif


struct pxa25x_udc {
	
struct usb_gadget			gadget;
	
struct usb_gadget_driver		*driver;

	
enum ep0_state				ep0state;
	
struct udc_stats			stats;
	
unsigned				got_irq : 1,
						
vbus : 1,
						
pullup : 1,
						
has_cfr : 1,
						
req_pending : 1,
						
req_std : 1,
						
req_config : 1,
						
suspended : 1,
						
active : 1;


#define start_watchdog(dev) mod_timer(&dev->timer, jiffies + (HZ/200))
	
struct timer_list			timer;

	
struct device				*dev;
	
struct clk				*clk;
	
struct pxa2xx_udc_mach_info		*mach;
	
struct usb_phy				*transceiver;
	
u64					dma_mask;
	
struct pxa25x_ep			ep [PXA_UDC_NUM_ENDPOINTS];

#ifdef CONFIG_USB_GADGET_DEBUG_FS
	
struct dentry				*debugfs_udc;
#endif
	
void __iomem				*regs;
};

#define to_pxa25x(g)	(container_of((g), struct pxa25x_udc, gadget))

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

#ifdef CONFIG_ARCH_LUBBOCK
#include <mach/lubbock.h>
/* lubbock can also report usb connect/disconnect irqs */
#endif


static struct pxa25x_udc *the_controller;

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

/*
 * Debugging support vanishes in non-debug builds.  DBG_NORMAL should be
 * mostly silent during normal use/testing, with no timing side-effects.
 */

#define DBG_NORMAL	1	
/* error paths, device state transitions */

#define DBG_VERBOSE	2	
/* add some success path trace info */

#define DBG_NOISY	3	
/* ... even more: request level */

#define DBG_VERY_NOISY	4	
/* ... even more: packet level */


#define DMSG(stuff...)	pr_debug("udc: " stuff)

#ifdef DEBUG


static const char *state_name[] = {
	"EP0_IDLE",
	"EP0_IN_DATA_PHASE", "EP0_OUT_DATA_PHASE",
	"EP0_END_XFER", "EP0_STALL"
};

#ifdef VERBOSE_DEBUG

#    define UDC_DEBUG DBG_VERBOSE
#else

#    define UDC_DEBUG DBG_NORMAL
#endif


static void __maybe_unused

dump_udccr(const char *label)
{
	u32	udccr = UDCCR;
	DMSG("%s %02X =%s%s%s%s%s%s%s%s\n",
		label, udccr,
		(udccr & UDCCR_REM) ? " rem" : "",
		(udccr & UDCCR_RSTIR) ? " rstir" : "",
		(udccr & UDCCR_SRM) ? " srm" : "",
		(udccr & UDCCR_SUSIR) ? " susir" : "",
		(udccr & UDCCR_RESIR) ? " resir" : "",
		(udccr & UDCCR_RSM) ? " rsm" : "",
		(udccr & UDCCR_UDA) ? " uda" : "",
		(udccr & UDCCR_UDE) ? " ude" : "");
}

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static void __maybe_unused

dump_udccs0(const char *label)
{
	u32		udccs0 = UDCCS0;

	DMSG("%s %s %02X =%s%s%s%s%s%s%s%s\n",
		label, state_name[the_controller->ep0state], udccs0,
		(udccs0 & UDCCS0_SA) ? " sa" : "",
		(udccs0 & UDCCS0_RNE) ? " rne" : "",
		(udccs0 & UDCCS0_FST) ? " fst" : "",
		(udccs0 & UDCCS0_SST) ? " sst" : "",
		(udccs0 & UDCCS0_DRWF) ? " dwrf" : "",
		(udccs0 & UDCCS0_FTF) ? " ftf" : "",
		(udccs0 & UDCCS0_IPR) ? " ipr" : "",
		(udccs0 & UDCCS0_OPR) ? " opr" : "");
}

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static inline u32 udc_ep_get_UDCCS(struct pxa25x_ep *);


static void __maybe_unused

dump_state(struct pxa25x_udc *dev)
{
	u32		tmp;
	unsigned	i;

	DMSG("%s, uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n",
		state_name[dev->ep0state],
		UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL);
	dump_udccr("udccr");
	if (dev->has_cfr) {
		tmp = UDCCFR;
		DMSG("udccfr %02X =%s%s\n", tmp,
			(tmp & UDCCFR_AREN) ? " aren" : "",
			(tmp & UDCCFR_ACM) ? " acm" : "");
	}

	if (!dev->driver) {
		DMSG("no gadget driver bound\n");
		return;
	} else
		DMSG("ep0 driver '%s'\n", dev->driver->driver.name);

	dump_udccs0 ("udccs0");
	DMSG("ep0 IN %lu/%lu, OUT %lu/%lu\n",
		dev->stats.write.bytes, dev->stats.write.ops,
		dev->stats.read.bytes, dev->stats.read.ops);

	for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++) {
		if (dev->ep[i].ep.desc == NULL)
			continue;
		DMSG ("udccs%d = %02x\n", i, udc_ep_get_UDCCS(&dev->ep[i]));
	}
}

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#else


#define	dump_udccr(x)	do{}while(0)

#define	dump_udccs0(x)	do{}while(0)

#define	dump_state(x)	do{}while(0)


#define UDC_DEBUG ((unsigned)0)

#endif


#define DBG(lvl, stuff...) do{if ((lvl) <= UDC_DEBUG) DMSG(stuff);}while(0)


#define ERR(stuff...)		pr_err("udc: " stuff)

#define WARNING(stuff...)	pr_warn("udc: " stuff)

#define INFO(stuff...)		pr_info("udc: " stuff)


#endif /* __LINUX_USB_GADGET_PXA25X_H */
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Directory: drivers/usb/gadget/udc

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