Release 4.17 drivers/usb/gadget/udc/omap_udc.c

Directory: drivers/usb/gadget/udc
// SPDX-License-Identifier: GPL-2.0+
/*
 * omap_udc.c -- for OMAP full speed udc; most chips support OTG.
 *
 * Copyright (C) 2004 Texas Instruments, Inc.
 * Copyright (C) 2004-2005 David Brownell
 *
 * OMAP2 & DMA support by Kyungmin Park <kyungmin.park@samsung.com>
 */

#undef	DEBUG
#undef	VERBOSE

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/timer.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/proc_fs.h>
#include <linux/mm.h>
#include <linux/moduleparam.h>
#include <linux/platform_device.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
#include <linux/dma-mapping.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/prefetch.h>
#include <linux/io.h>

#include <asm/byteorder.h>
#include <asm/irq.h>
#include <asm/unaligned.h>
#include <asm/mach-types.h>

#include <linux/omap-dma.h>

#include <mach/usb.h>

#include "omap_udc.h"

#undef	USB_TRACE

/* bulk DMA seems to be behaving for both IN and OUT */

#define	USE_DMA

/* ISO too */

#define	USE_ISO


#define	DRIVER_DESC	"OMAP UDC driver"

#define	DRIVER_VERSION	"4 October 2004"


#define OMAP_DMA_USB_W2FC_TX0		29

#define OMAP_DMA_USB_W2FC_RX0		26

/*
 * The OMAP UDC needs _very_ early endpoint setup:  before enabling the
 * D+ pullup to allow enumeration.  That's too early for the gadget
 * framework to use from usb_endpoint_enable(), which happens after
 * enumeration as part of activating an interface.  (But if we add an
 * optional new "UDC not yet running" state to the gadget driver model,
 * even just during driver binding, the endpoint autoconfig logic is the
 * natural spot to manufacture new endpoints.)
 *
 * So instead of using endpoint enable calls to control the hardware setup,
 * this driver defines a "fifo mode" parameter.  It's used during driver
 * initialization to choose among a set of pre-defined endpoint configs.
 * See omap_udc_setup() for available modes, or to add others.  That code
 * lives in an init section, so use this driver as a module if you need
 * to change the fifo mode after the kernel boots.
 *
 * Gadget drivers normally ignore endpoints they don't care about, and
 * won't include them in configuration descriptors.  That means only
 * misbehaving hosts would even notice they exist.
 */
#ifdef	USE_ISO

static unsigned fifo_mode = 3;
#else

static unsigned fifo_mode;
#endif

/* "modprobe omap_udc fifo_mode=42", or else as a kernel
 * boot parameter "omap_udc:fifo_mode=42"
 */
module_param(fifo_mode, uint, 0);
MODULE_PARM_DESC(fifo_mode, "endpoint configuration");

#ifdef	USE_DMA

static bool use_dma = 1;

/* "modprobe omap_udc use_dma=y", or else as a kernel
 * boot parameter "omap_udc:use_dma=y"
 */
module_param(use_dma, bool, 0);
MODULE_PARM_DESC(use_dma, "enable/disable DMA");
#else	/* !USE_DMA */

/* save a bit of code */

#define	use_dma		0
#endif	/* !USE_DMA */



static const char driver_name[] = "omap_udc";

static const char driver_desc[] = DRIVER_DESC;

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

/* there's a notion of "current endpoint" for modifying endpoint
 * state, and PIO access to its FIFO.
 */



static void use_ep(struct omap_ep *ep, u16 select)
{
	u16	num = ep->bEndpointAddress & 0x0f;

	if (ep->bEndpointAddress & USB_DIR_IN)
		num |= UDC_EP_DIR;
	omap_writew(num | select, UDC_EP_NUM);
	/* when select, MUST deselect later !! */
}

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static inline void deselect_ep(void)
{
	u16 w;

	w = omap_readw(UDC_EP_NUM);
	w &= ~UDC_EP_SEL;
	omap_writew(w, UDC_EP_NUM);
	/* 6 wait states before TX will happen */
}

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static void dma_channel_claim(struct omap_ep *ep, unsigned preferred);

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



static int omap_ep_enable(struct usb_ep *_ep,
		const struct usb_endpoint_descriptor *desc)
{
	struct omap_ep	*ep = container_of(_ep, struct omap_ep, ep);
	struct omap_udc	*udc;
	unsigned long	flags;
	u16		maxp;

	/* catch various bogus parameters */
	if (!_ep || !desc
			|| desc->bDescriptorType != USB_DT_ENDPOINT
			|| ep->bEndpointAddress != desc->bEndpointAddress
			|| ep->maxpacket < usb_endpoint_maxp(desc)) {
		DBG("%s, bad ep or descriptor\n", __func__);
		return -EINVAL;
	}
	maxp = usb_endpoint_maxp(desc);
	if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
				&& maxp != ep->maxpacket)
			|| usb_endpoint_maxp(desc) > ep->maxpacket
			|| !desc->wMaxPacketSize) {
		DBG("%s, bad %s maxpacket\n", __func__, _ep->name);
		return -ERANGE;
	}

#ifdef	USE_ISO
	if ((desc->bmAttributes == USB_ENDPOINT_XFER_ISOC
				&& desc->bInterval != 1)) {
		/* hardware wants period = 1; USB allows 2^(Interval-1) */
		DBG("%s, unsupported ISO period %dms\n", _ep->name,
				1 << (desc->bInterval - 1));
		return -EDOM;
	}
#else
	if (desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
		DBG("%s, ISO nyet\n", _ep->name);
		return -EDOM;
	}
#endif

	/* xfer types must match, except that interrupt ~= bulk */
	if (ep->bmAttributes != desc->bmAttributes
			&& ep->bmAttributes != USB_ENDPOINT_XFER_BULK
			&& desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
		DBG("%s, %s type mismatch\n", __func__, _ep->name);
		return -EINVAL;
	}

	udc = ep->udc;
	if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) {
		DBG("%s, bogus device state\n", __func__);
		return -ESHUTDOWN;
	}

	spin_lock_irqsave(&udc->lock, flags);

	ep->ep.desc = desc;
	ep->irqs = 0;
	ep->stopped = 0;
	ep->ep.maxpacket = maxp;

	/* set endpoint to initial state */
	ep->dma_channel = 0;
	ep->has_dma = 0;
	ep->lch = -1;
	use_ep(ep, UDC_EP_SEL);
	omap_writew(udc->clr_halt, UDC_CTRL);
	ep->ackwait = 0;
	deselect_ep();

	if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
		list_add(&ep->iso, &udc->iso);

	/* maybe assign a DMA channel to this endpoint */
	if (use_dma && desc->bmAttributes == USB_ENDPOINT_XFER_BULK)
		/* FIXME ISO can dma, but prefers first channel */
		dma_channel_claim(ep, 0);

	/* PIO OUT may RX packets */
	if (desc->bmAttributes != USB_ENDPOINT_XFER_ISOC
			&& !ep->has_dma
			&& !(ep->bEndpointAddress & USB_DIR_IN)) {
		omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
		ep->ackwait = 1 + ep->double_buf;
	}

	spin_unlock_irqrestore(&udc->lock, flags);
	VDBG("%s enabled\n", _ep->name);
	return 0;
}

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Ido Shayevitz 2 0.42% 1 14.29%
Total 476 100.00% 7 100.00%

static void nuke(struct omap_ep *, int status);



static int omap_ep_disable(struct usb_ep *_ep)
{
	struct omap_ep	*ep = container_of(_ep, struct omap_ep, ep);
	unsigned long	flags;

	if (!_ep || !ep->ep.desc) {
		DBG("%s, %s not enabled\n", __func__,
			_ep ? ep->ep.name : NULL);
		return -EINVAL;
	}

	spin_lock_irqsave(&ep->udc->lock, flags);
	ep->ep.desc = NULL;
	nuke(ep, -ESHUTDOWN);
	ep->ep.maxpacket = ep->maxpacket;
	ep->has_dma = 0;
	omap_writew(UDC_SET_HALT, UDC_CTRL);
	list_del_init(&ep->iso);
	del_timer(&ep->timer);

	spin_unlock_irqrestore(&ep->udc->lock, flags);

	VDBG("%s disabled\n", _ep->name);
	return 0;
}

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Harvey Harrison 1 0.64% 1 16.67%
Total 156 100.00% 6 100.00%

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


static struct usb_request *

omap_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
{
	struct omap_req	*req;

	req = kzalloc(sizeof(*req), gfp_flags);
	if (!req)
		return NULL;

	INIT_LIST_HEAD(&req->queue);

	return &req->req;
}

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Total 56 100.00% 4 100.00%


static void

omap_free_request(struct usb_ep *ep, struct usb_request *_req)
{
	struct omap_req	*req = container_of(_req, struct omap_req, req);

	kfree(req);
}

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


static void

done(struct omap_ep *ep, struct omap_req *req, int status)
{
	struct omap_udc		*udc = ep->udc;
	unsigned		stopped = ep->stopped;

	list_del_init(&req->queue);

	if (req->req.status == -EINPROGRESS)
		req->req.status = status;
	else
		status = req->req.status;

	if (use_dma && ep->has_dma)
		usb_gadget_unmap_request(&udc->gadget, &req->req,
				(ep->bEndpointAddress & USB_DIR_IN));

#ifndef	USB_TRACE
	if (status && status != -ESHUTDOWN)
#endif
		VDBG("complete %s req %p stat %d len %u/%u\n",
			ep->ep.name, &req->req, status,
			req->req.actual, req->req.length);

	/* don't modify queue heads during completion callback */
	ep->stopped = 1;
	spin_unlock(&ep->udc->lock);
	usb_gadget_giveback_request(&ep->ep, &req->req);
	spin_lock(&ep->udc->lock);
	ep->stopped = stopped;
}

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


#define UDC_FIFO_FULL		(UDC_NON_ISO_FIFO_FULL | UDC_ISO_FIFO_FULL)

#define UDC_FIFO_UNWRITABLE	(UDC_EP_HALTED | UDC_FIFO_FULL)


#define FIFO_EMPTY	(UDC_NON_ISO_FIFO_EMPTY | UDC_ISO_FIFO_EMPTY)

#define FIFO_UNREADABLE (UDC_EP_HALTED | FIFO_EMPTY)


static inline int

write_packet(u8 *buf, struct omap_req *req, unsigned max)
{
	unsigned	len;
	u16		*wp;

	len = min(req->req.length - req->req.actual, max);
	req->req.actual += len;

	max = len;
	if (likely((((int)buf) & 1) == 0)) {
		wp = (u16 *)buf;
		while (max >= 2) {
			omap_writew(*wp++, UDC_DATA);
			max -= 2;
		}
		buf = (u8 *)wp;
	}
	while (max--)
		omap_writeb(*buf++, UDC_DATA);
	return len;
}

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/* FIXME change r/w fifo calling convention */


/* return:  0 = still running, 1 = completed, negative = errno */


static int write_fifo(struct omap_ep *ep, struct omap_req *req)
{
	u8		*buf;
	unsigned	count;
	int		is_last;
	u16		ep_stat;

	buf = req->req.buf + req->req.actual;
	prefetch(buf);

	/* PIO-IN isn't double buffered except for iso */
	ep_stat = omap_readw(UDC_STAT_FLG);
	if (ep_stat & UDC_FIFO_UNWRITABLE)
		return 0;

	count = ep->ep.maxpacket;
	count = write_packet(buf, req, count);
	omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
	ep->ackwait = 1;

	/* last packet is often short (sometimes a zlp) */
	if (count != ep->ep.maxpacket)
		is_last = 1;
	else if (req->req.length == req->req.actual
			&& !req->req.zero)
		is_last = 1;
	else
		is_last = 0;

	/* NOTE:  requests complete when all IN data is in a
         * FIFO (or sometimes later, if a zlp was needed).
         * Use usb_ep_fifo_status() where needed.
         */
	if (is_last)
		done(ep, req, 0);
	return is_last;
}

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static inline int

read_packet(u8 *buf, struct omap_req *req, unsigned avail)
{
	unsigned	len;
	u16		*wp;

	len = min(req->req.length - req->req.actual, avail);
	req->req.actual += len;
	avail = len;

	if (likely((((int)buf) & 1) == 0)) {
		wp = (u16 *)buf;
		while (avail >= 2) {
			*wp++ = omap_readw(UDC_DATA);
			avail -= 2;
		}
		buf = (u8 *)wp;
	}
	while (avail--)
		*buf++ = omap_readb(UDC_DATA);
	return len;
}

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/* return:  0 = still running, 1 = queue empty, negative = errno */


static int read_fifo(struct omap_ep *ep, struct omap_req *req)
{
	u8		*buf;
	unsigned	count, avail;
	int		is_last;

	buf = req->req.buf + req->req.actual;
	prefetchw(buf);

	for (;;) {
		u16	ep_stat = omap_readw(UDC_STAT_FLG);

		is_last = 0;
		if (ep_stat & FIFO_EMPTY) {
			if (!ep->double_buf)
				break;
			ep->fnf = 1;
		}
		if (ep_stat & UDC_EP_HALTED)
			break;

		if (ep_stat & UDC_FIFO_FULL)
			avail = ep->ep.maxpacket;
		else  {
			avail = omap_readw(UDC_RXFSTAT);
			ep->fnf = ep->double_buf;
		}
		count = read_packet(buf, req, avail);

		/* partial packet reads may not be errors */
		if (count < ep->ep.maxpacket) {
			is_last = 1;
			/* overflowed this request?  flush extra data */
			if (count != avail) {
				req->req.status = -EOVERFLOW;
				avail -= count;
				while (avail--)
					omap_readw(UDC_DATA);
			}
		} else if (req->req.length == req->req.actual)
			is_last = 1;
		else
			is_last = 0;

		if (!ep->bEndpointAddress)
			break;
		if (is_last)
			done(ep, req, 0);
		break;
	}
	return is_last;
}

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



static u16 dma_src_len(struct omap_ep *ep, dma_addr_t start)
{
	dma_addr_t	end;

	/* IN-DMA needs this on fault/cancel paths, so 15xx misreports
         * the last transfer's bytecount by more than a FIFO's worth.
         */
	if (cpu_is_omap15xx())
		return 0;

	end = omap_get_dma_src_pos(ep->lch);
	if (end == ep->dma_counter)
		return 0;

	end |= start & (0xffff << 16);
	if (end < start)
		end += 0x10000;
	return end - start;
}

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static u16 dma_dest_len(struct omap_ep *ep, dma_addr_t start)
{
	dma_addr_t	end;

	end = omap_get_dma_dst_pos(ep->lch);
	if (end == ep->dma_counter)
		return 0;

	end |= start & (0xffff << 16);
	if (cpu_is_omap15xx())
		end++;
	if (end < start)
		end += 0x10000;
	return end - start;
}


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/* Each USB transfer request using DMA maps to one or more DMA transfers.
 * When DMA completion isn't request completion, the UDC continues with
 * the next DMA transfer for that USB transfer.
 */



static void next_in_dma(struct omap_ep *ep, struct omap_req *req)
{
	u16		txdma_ctrl, w;
	unsigned	length = req->req.length - req->req.actual;
	const int	sync_mode = cpu_is_omap15xx()
				? OMAP_DMA_SYNC_FRAME
				: OMAP_DMA_SYNC_ELEMENT;
	int		dma_trigger = 0;

	/* measure length in either bytes or packets */
	if ((cpu_is_omap16xx() && length <= UDC_TXN_TSC)
			|| (cpu_is_omap15xx() && length < ep->maxpacket)) {
		txdma_ctrl = UDC_TXN_EOT | length;
		omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S8,
				length, 1, sync_mode, dma_trigger, 0);
	} else {
		length = min(length / ep->maxpacket,
				(unsigned) UDC_TXN_TSC + 1);
		txdma_ctrl = length;
		omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S16,
				ep->ep.maxpacket >> 1, length, sync_mode,
				dma_trigger, 0);
		length *= ep->maxpacket;
	}
	omap_set_dma_src_params(ep->lch, OMAP_DMA_PORT_EMIFF,
		OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual,
		0, 0);

	omap_start_dma(ep->lch);
	ep->dma_counter = omap_get_dma_src_pos(ep->lch);
	w = omap_readw(UDC_DMA_IRQ_EN);
	w |= UDC_TX_DONE_IE(ep->dma_channel);
	omap_writew(w, UDC_DMA_IRQ_EN);
	omap_writew(UDC_TXN_START | txdma_ctrl, UDC_TXDMA(ep->dma_channel));
	req->dma_bytes = length;
}

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static void finish_in_dma(struct omap_ep *ep, struct omap_req *req, int status)
{
	u16 w;

	if (status == 0) {
		req->req.actual += req->dma_bytes;

		/* return if this request needs to send data or zlp */
		if (req->req.actual < req->req.length)
			return;
		if (req->req.zero
				&& req->dma_bytes != 0
				&& (req->req.actual % ep->maxpacket) == 0)
			return;
	} else
		req->req.actual += dma_src_len(ep, req->req.dma
							+ req->req.actual);

	/* tx completion */
	omap_stop_dma(ep->lch);
	w = omap_readw(UDC_DMA_IRQ_EN);
	w &= ~UDC_TX_DONE_IE(ep->dma_channel);
	omap_writew(w, UDC_DMA_IRQ_EN);
	done(ep, req, status);
}

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static void next_out_dma(struct omap_ep *ep, struct omap_req *req)
{
	unsigned packets = req->req.length - req->req.actual;
	int dma_trigger = 0;
	u16 w;

	/* set up this DMA transfer, enable the fifo, start */
	packets /= ep->ep.maxpacket;
	packets = min(packets, (unsigned)UDC_RXN_TC + 1);
	req->dma_bytes = packets * ep->ep.maxpacket;
	omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S16,
			ep->ep.maxpacket >> 1, packets,
			OMAP_DMA_SYNC_ELEMENT,
			dma_trigger, 0);
	omap_set_dma_dest_params(ep->lch, OMAP_DMA_PORT_EMIFF,
		OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual,
		0, 0);
	ep->dma_counter = omap_get_dma_dst_pos(ep->lch);

	omap_writew(UDC_RXN_STOP | (packets - 1), UDC_RXDMA(ep->dma_channel));
	w = omap_readw(UDC_DMA_IRQ_EN);
	w |= UDC_RX_EOT_IE(ep->dma_channel);
	omap_writew(w, UDC_DMA_IRQ_EN);
	omap_writew(ep->bEndpointAddress & 0xf, UDC_EP_NUM);
	omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);

	omap_start_dma(ep->lch);
}

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Total 203 100.00% 7 100.00%


static void

finish_out_dma(struct omap_ep *ep, struct omap_req *req, int status, int one)
{
	u16	count, w;

	if (status == 0)
		ep->dma_counter = (u16) (req->req.dma + req->req.actual);
	count = dma_dest_len(ep, req->req.dma + req->req.actual);
	count += req->req.actual;
	if (one)
		count--;
	if (count <= req->req.length)
		req->req.actual = count;

	if (count != req->dma_bytes || status)
		omap_stop_dma(ep->lch);

	/* if this wasn't short, request may need another transfer */
	else if (req->req.actual < req->req.length)
		return;

	/* rx completion */
	w = omap_readw(UDC_DMA_IRQ_EN);
	w &= ~UDC_RX_EOT_IE(ep->dma_channel);
	omap_writew(w, UDC_DMA_IRQ_EN);
	done(ep, req, status);
}

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static void dma_irq(struct omap_udc *udc, u16 irq_src)
{
	u16		dman_stat = omap_readw(UDC_DMAN_STAT);
	struct omap_ep	*ep;
	struct omap_req	*req;

	/* IN dma: tx to host */
	if (irq_src & UDC_TXN_DONE) {
		ep = &udc->ep[16 + UDC_DMA_TX_SRC(dman_stat)];
		ep->irqs++;
		/* can see TXN_DONE after dma abort */
		if (!list_empty(&ep->queue)) {
			req = container_of(ep->queue.next,
						struct omap_req, queue);
			finish_in_dma(ep, req, 0);
		}
		omap_writew(UDC_TXN_DONE, UDC_IRQ_SRC);

		if (!list_empty(&ep->queue)) {
			req = container_of(ep->queue.next,
					struct omap_req, queue);
			next_in_dma(ep, req);
		}
	}

	/* OUT dma: rx from host */
	if (irq_src & UDC_RXN_EOT) {
		ep = &udc->ep[UDC_DMA_RX_SRC(dman_stat)];
		ep->irqs++;
		/* can see RXN_EOT after dma abort */
		if (!list_empty(&ep->queue)) {
			req = container_of(ep->queue.next,
					struct omap_req, queue);
			finish_out_dma(ep, req, 0, dman_stat & UDC_DMA_RX_SB);
		}
		omap_writew(UDC_RXN_EOT, UDC_IRQ_SRC);

		if (!list_empty(&ep->queue)) {
			req = container_of(ep->queue.next,
					struct omap_req, queue);
			next_out_dma(ep, req);
		}
	}

	if (irq_src & UDC_RXN_CNT) {
		ep = &udc->ep[UDC_DMA_RX_SRC(dman_stat)];
		ep->irqs++;
		/* omap15xx does this unasked... */
		VDBG("%s, RX_CNT irq?\n", ep->ep.name);
		omap_writew(UDC_RXN_CNT, UDC_IRQ_SRC);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 282 93.69% 3 75.00%
Tony Lindgren 19 6.31% 1 25.00%
Total 301 100.00% 4 100.00%



static void dma_error(int lch, u16 ch_status, void *data)
{
	struct omap_ep	*ep = data;

	/* if ch_status & OMAP_DMA_DROP_IRQ ... */
	/* if ch_status & OMAP1_DMA_TOUT_IRQ ... */
	ERR("%s dma error, lch %d status %02x\n", ep->ep.name, lch, ch_status);

	/* complete current transfer ... */
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 40 97.56% 1 50.00%
Tony Lindgren 1 2.44% 1 50.00%
Total 41 100.00% 2 100.00%



static void dma_channel_claim(struct omap_ep *ep, unsigned channel)
{
	u16	reg;
	int	status, restart, is_in;
	int	dma_channel;

	is_in = ep->bEndpointAddress & USB_DIR_IN;
	if (is_in)
		reg = omap_readw(UDC_TXDMA_CFG);
	else
		reg = omap_readw(UDC_RXDMA_CFG);
	reg |= UDC_DMA_REQ;		/* "pulse" activated */

	ep->dma_channel = 0;
	ep->lch = -1;
	if (channel == 0 || channel > 3) {
		if ((reg & 0x0f00) == 0)
			channel = 3;
		else if ((reg & 0x00f0) == 0)
			channel = 2;
		else if ((reg & 0x000f) == 0)	/* preferred for ISO */
			channel = 1;
		else {
			status = -EMLINK;
			goto just_restart;
		}
	}
	reg |= (0x0f & ep->bEndpointAddress) << (4 * (channel - 1));
	ep->dma_channel = channel;

	if (is_in) {
		dma_channel = OMAP_DMA_USB_W2FC_TX0 - 1 + channel;
		status = omap_request_dma(dma_channel,
			ep->ep.name, dma_error, ep, &ep->lch);
		if (status == 0) {
			omap_writew(reg, UDC_TXDMA_CFG);
			/* EMIFF or SDRC */
			omap_set_dma_src_burst_mode(ep->lch,
						OMAP_DMA_DATA_BURST_4);
			omap_set_dma_src_data_pack(ep->lch, 1);
			/* TIPB */
			omap_set_dma_dest_params(ep->lch,
				OMAP_DMA_PORT_TIPB,
				OMAP_DMA_AMODE_CONSTANT,
				UDC_DATA_DMA,
				0, 0);
		}
	} else {
		dma_channel = OMAP_DMA_USB_W2FC_RX0 - 1 + channel;
		status = omap_request_dma(dma_channel,
			ep->ep.name, dma_error, ep, &ep->lch);
		if (status == 0) {
			omap_writew(reg, UDC_RXDMA_CFG);
			/* TIPB */
			omap_set_dma_src_params(ep->lch,
				OMAP_DMA_PORT_TIPB,
				OMAP_DMA_AMODE_CONSTANT,
				UDC_DATA_DMA,
				0, 0);
			/* EMIFF or SDRC */
			omap_set_dma_dest_burst_mode(ep->lch,
						OMAP_DMA_DATA_BURST_4);
			omap_set_dma_dest_data_pack(ep->lch, 1);
		}
	}
	if (status)
		ep->dma_channel = 0;
	else {
		ep->has_dma = 1;
		omap_disable_dma_irq(ep->lch, OMAP_DMA_BLOCK_IRQ);

		/* channel type P: hw synch (fifo) */
		if (!cpu_is_omap15xx())
			omap_set_dma_channel_mode(ep->lch, OMAP_DMA_LCH_P);
	}

just_restart:
	/* restart any queue, even if the claim failed  */
	restart = !ep->stopped && !list_empty(&ep->queue);

	if (status)
		DBG("%s no dma channel: %d%s\n", ep->ep.name, status,
			restart ? " (restart)" : "");
	else
		DBG("%s claimed %cxdma%d lch %d%s\n", ep->ep.name,
			is_in ? 't' : 'r',
			ep->dma_channel - 1, ep->lch,
			restart ? " (restart)" : "");

	if (restart) {
		struct omap_req	*req;
		req = container_of(ep->queue.next, struct omap_req, queue);
		if (ep->has_dma)
			(is_in ? next_in_dma : next_out_dma)(ep, req);
		else {
			use_ep(ep, UDC_EP_SEL);
			(is_in ? write_fifo : read_fifo)(ep, req);
			deselect_ep();
			if (!is_in) {
				omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
				ep->ackwait = 1 + ep->double_buf;
			}
			/* IN: 6 wait states before it'll tx */
		}
	}
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 507 91.19% 4 57.14%
Tony Lindgren 28 5.04% 2 28.57%
Kyungmin Park 21 3.78% 1 14.29%
Total 556 100.00% 7 100.00%



static void dma_channel_release(struct omap_ep *ep)
{
	int		shift = 4 * (ep->dma_channel - 1);
	u16		mask = 0x0f << shift;
	struct omap_req	*req;
	int		active;

	/* abort any active usb transfer request */
	if (!list_empty(&ep->queue))
		req = container_of(ep->queue.next, struct omap_req, queue);
	else
		req = NULL;

	active = omap_get_dma_active_status(ep->lch);

	DBG("%s release %s %cxdma%d %p\n", ep->ep.name,
			active ? "active" : "idle",
			(ep->bEndpointAddress & USB_DIR_IN) ? 't' : 'r',
			ep->dma_channel - 1, req);

	/* NOTE: re-setting RX_REQ/TX_REQ because of a chip bug (before
         * OMAP 1710 ES2.0) where reading the DMA_CFG can clear them.
         */

	/* wait till current packet DMA finishes, and fifo empties */
	if (ep->bEndpointAddress & USB_DIR_IN) {
		omap_writew((omap_readw(UDC_TXDMA_CFG) & ~mask) | UDC_DMA_REQ,
					UDC_TXDMA_CFG);

		if (req) {
			finish_in_dma(ep, req, -ECONNRESET);

			/* clear FIFO; hosts probably won't empty it */
			use_ep(ep, UDC_EP_SEL);
			omap_writew(UDC_CLR_EP, UDC_CTRL);
			deselect_ep();
		}
		while (omap_readw(UDC_TXDMA_CFG) & mask)
			udelay(10);
	} else {
		omap_writew((omap_readw(UDC_RXDMA_CFG) & ~mask) | UDC_DMA_REQ,
					UDC_RXDMA_CFG);

		/* dma empties the fifo */
		while (omap_readw(UDC_RXDMA_CFG) & mask)
			udelay(10);
		if (req)
			finish_out_dma(ep, req, -ECONNRESET, 0);
	}
	omap_free_dma(ep->lch);
	ep->dma_channel = 0;
	ep->lch = -1;
	/* has_dma still set, till endpoint is fully quiesced */
}


Contributors
Person Tokens Prop Commits CommitProp
David Brownell 235 88.01% 5 71.43%
Tony Lindgren 32 11.99% 2 28.57%
Total 267 100.00% 7 100.00%

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


static int

omap_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
{
	struct omap_ep	*ep = container_of(_ep, struct omap_ep, ep);
	struct omap_req	*req = container_of(_req, struct omap_req, req);
	struct omap_udc	*udc;
	unsigned long	flags;
	int		is_iso = 0;

	/* catch various bogus parameters */
	if (!_req || !req->req.complete || !req->req.buf
			|| !list_empty(&req->queue)) {
		DBG("%s, bad params\n", __func__);
		return -EINVAL;
	}
	if (!_ep || (!ep->ep.desc && ep->bEndpointAddress)) {
		DBG("%s, bad ep\n", __func__);
		return -EINVAL;
	}
	if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
		if (req->req.length > ep->ep.maxpacket)
			return -EMSGSIZE;
		is_iso = 1;
	}

	/* this isn't bogus, but OMAP DMA isn't the only hardware to
         * have a hard time with partial packet reads...  reject it.
         */
	if (use_dma
			&& ep->has_dma
			&& ep->bEndpointAddress != 0
			&& (ep->bEndpointAddress & USB_DIR_IN) == 0
			&& (req->req.length % ep->ep.maxpacket) != 0) {
		DBG("%s, no partial packet OUT reads\n", __func__);
		return -EMSGSIZE;
	}

	udc = ep->udc;
	if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
		return -ESHUTDOWN;

	if (use_dma && ep->has_dma)
		usb_gadget_map_request(&udc->gadget, &req->req,
				(ep->bEndpointAddress & USB_DIR_IN));

	VDBG("%s queue req %p, len %d buf %p\n",
		ep->ep.name, _req, _req->length, _req->buf);

	spin_lock_irqsave(&udc->lock, flags);

	req->req.status = -EINPROGRESS;
	req->req.actual = 0;

	/* maybe kickstart non-iso i/o queues */
	if (is_iso) {
		u16 w;

		w = omap_readw(UDC_IRQ_EN);
		w |= UDC_SOF_IE;
		omap_writew(w, UDC_IRQ_EN);
	} else if (list_empty(&ep->queue) && !ep->stopped && !ep->ackwait) {
		int	is_in;

		if (ep->bEndpointAddress == 0) {
			if (!udc->ep0_pending || !list_empty(&ep->queue)) {
				spin_unlock_irqrestore(&udc->lock, flags);
				return -EL2HLT;
			}

			/* empty DATA stage? */
			is_in = udc->ep0_in;
			if (!req->req.length) {

				/* chip became CONFIGURED or ADDRESSED
                                 * earlier; drivers may already have queued
                                 * requests to non-control endpoints
                                 */
				if (udc->ep0_set_config) {
					u16	irq_en = omap_readw(UDC_IRQ_EN);

					irq_en |= UDC_DS_CHG_IE | UDC_EP0_IE;
					if (!udc->ep0_reset_config)
						irq_en |= UDC_EPN_RX_IE
							| UDC_EPN_TX_IE;
					omap_writew(irq_en, UDC_IRQ_EN);
				}

				/* STATUS for zero length DATA stages is
                                 * always an IN ... even for IN transfers,
                                 * a weird case which seem to stall OMAP.
                                 */
				omap_writew(UDC_EP_SEL | UDC_EP_DIR,
						UDC_EP_NUM);
				omap_writew(UDC_CLR_EP, UDC_CTRL);
				omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
				omap_writew(UDC_EP_DIR, UDC_EP_NUM);

				/* cleanup */
				udc->ep0_pending = 0;
				done(ep, req, 0);
				req = NULL;

			/* non-empty DATA stage */
			} else if (is_in) {
				omap_writew(UDC_EP_SEL | UDC_EP_DIR,
						UDC_EP_NUM);
			} else {
				if (udc->ep0_setup)
					goto irq_wait;
				omap_writew(UDC_EP_SEL, UDC_EP_NUM);
			}
		} else {
			is_in = ep->bEndpointAddress & USB_DIR_IN;
			if (!ep->has_dma)
				use_ep(ep, UDC_EP_SEL);
			/* if ISO: SOF IRQs must be enabled/disabled! */
		}

		if (ep->has_dma)
			(is_in ? next_in_dma : next_out_dma)(ep, req);
		else if (req) {
			if ((is_in ? write_fifo : read_fifo)(ep, req) == 1)
				req = NULL;
			deselect_ep();
			if (!is_in) {
				omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
				ep->ackwait = 1 + ep->double_buf;
			}
			/* IN: 6 wait states before it'll tx */
		}
	}

irq_wait:
	/* irq handler advances the queue */
	if (req != NULL)
		list_add_tail(&req->queue, &ep->queue);
	spin_unlock_irqrestore(&udc->lock, flags);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 630 89.49% 3 30.00%
Tony Lindgren 65 9.23% 2 20.00%
Harvey Harrison 3 0.43% 1 10.00%
Felipe Balbi 2 0.28% 1 10.00%
Ido Shayevitz 2 0.28% 1 10.00%
Al Viro 1 0.14% 1 10.00%
Joe Perches 1 0.14% 1 10.00%
Total 704 100.00% 10 100.00%



static int omap_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
	struct omap_ep	*ep = container_of(_ep, struct omap_ep, ep);
	struct omap_req	*req;
	unsigned long	flags;

	if (!_ep || !_req)
		return -EINVAL;

	spin_lock_irqsave(&ep->udc->lock, flags);

	/* make sure it's actually queued on this endpoint */
	list_for_each_entry(req, &ep->queue, queue) {
		if (&req->req == _req)
			break;
	}
	if (&req->req != _req) {
		spin_unlock_irqrestore(&ep->udc->lock, flags);
		return -EINVAL;
	}

	if (use_dma && ep->dma_channel && ep->queue.next == &req->queue) {
		int channel = ep->dma_channel;

		/* releasing the channel cancels the request,
                 * reclaiming the channel restarts the queue
                 */
		dma_channel_release(ep);
		dma_channel_claim(ep, channel);
	} else
		done(ep, req, -ECONNRESET);
	spin_unlock_irqrestore(&ep->udc->lock, flags);
	return 0;
}

Contributors
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David Brownell 179 100.00% 2 100.00%
Total 179 100.00% 2 100.00%

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



static int omap_ep_set_halt(struct usb_ep *_ep, int value)
{
	struct omap_ep	*ep = container_of(_ep, struct omap_ep, ep);
	unsigned long	flags;
	int		status = -EOPNOTSUPP;

	spin_lock_irqsave(&ep->udc->lock, flags);

	/* just use protocol stalls for ep0; real halts are annoying */
	if (ep->bEndpointAddress == 0) {
		if (!ep->udc->ep0_pending)
			status = -EINVAL;
		else if (value) {
			if (ep->udc->ep0_set_config) {
				WARNING("error changing config?\n");
				omap_writew(UDC_CLR_CFG, UDC_SYSCON2);
			}
			omap_writew(UDC_STALL_CMD, UDC_SYSCON2);
			ep->udc->ep0_pending = 0;
			status = 0;
		} else /* NOP */
			status = 0;

	/* otherwise, all active non-ISO endpoints can halt */
	} else if (ep->bmAttributes != USB_ENDPOINT_XFER_ISOC && ep->ep.desc) {

		/* IN endpoints must already be idle */
		if ((ep->bEndpointAddress & USB_DIR_IN)
				&& !list_empty(&ep->queue)) {
			status = -EAGAIN;
			goto done;
		}

		if (value) {
			int	channel;

			if (use_dma && ep->dma_channel
					&& !list_empty(&ep->queue)) {
				channel = ep->dma_channel;
				dma_channel_release(ep);
			} else
				channel = 0;

			use_ep(ep, UDC_EP_SEL);
			if (omap_readw(UDC_STAT_FLG) & UDC_NON_ISO_FIFO_EMPTY) {
				omap_writew(UDC_SET_HALT, UDC_CTRL);
				status = 0;
			} else
				status = -EAGAIN;
			deselect_ep();

			if (channel)
				dma_channel_claim(ep, channel);
		} else {
			use_ep(ep, 0);
			omap_writew(ep->udc->clr_halt, UDC_CTRL);
			ep->ackwait = 0;
			if (!(ep->bEndpointAddress & USB_DIR_IN)) {
				omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
				ep->ackwait = 1 + ep->double_buf;
			}
		}
	}
done:
	VDBG("%s %s halt stat %d\n", ep->ep.name,
		value ? "set" : "clear", status);

	spin_unlock_irqrestore(&ep->udc->lock, flags);
	return status;
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 331 90.93% 3 50.00%
Tony Lindgren 30 8.24% 1 16.67%
Ido Shayevitz 2 0.55% 1 16.67%
Arjan van de Ven 1 0.27% 1 16.67%
Total 364 100.00% 6 100.00%


static const struct usb_ep_ops omap_ep_ops = {
	.enable		= omap_ep_enable,
	.disable	= omap_ep_disable,

	.alloc_request	= omap_alloc_request,
	.free_request	= omap_free_request,

	.queue		= omap_ep_queue,
	.dequeue	= omap_ep_dequeue,

	.set_halt	= omap_ep_set_halt,
	/* fifo_status ... report bytes in fifo */
	/* fifo_flush ... flush fifo */
};

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



static int omap_get_frame(struct usb_gadget *gadget)
{
	u16	sof = omap_readw(UDC_SOF);
	return (sof & UDC_TS_OK) ? (sof & UDC_TS) : -EL2NSYNC;
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 31 88.57% 1 50.00%
Tony Lindgren 4 11.43% 1 50.00%
Total 35 100.00% 2 100.00%



static int omap_wakeup(struct usb_gadget *gadget)
{
	struct omap_udc	*udc;
	unsigned long	flags;
	int		retval = -EHOSTUNREACH;

	udc = container_of(gadget, struct omap_udc, gadget);

	spin_lock_irqsave(&udc->lock, flags);
	if (udc->devstat & UDC_SUS) {
		/* NOTE:  OTG spec erratum says that OTG devices may
                 * issue wakeups without host enable.
                 */
		if (udc->devstat & (UDC_B_HNP_ENABLE|UDC_R_WK_OK)) {
			DBG("remote wakeup...\n");
			omap_writew(UDC_RMT_WKP, UDC_SYSCON2);
			retval = 0;
		}

	/* NOTE:  non-OTG systems may use SRP TOO... */
	} else if (!(udc->devstat & UDC_ATT)) {
		if (!IS_ERR_OR_NULL(udc->transceiver))
			retval = otg_start_srp(udc->transceiver->otg);
	}
	spin_unlock_irqrestore(&udc->lock, flags);

	return retval;
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 127 92.03% 1 25.00%
Tony Lindgren 5 3.62% 1 25.00%
Kishon Vijay Abraham I 4 2.90% 1 25.00%
Heikki Krogerus 2 1.45% 1 25.00%
Total 138 100.00% 4 100.00%


static int

omap_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered)
{
	struct omap_udc	*udc;
	unsigned long	flags;
	u16		syscon1;

	gadget->is_selfpowered = (is_selfpowered != 0);
	udc = container_of(gadget, struct omap_udc, gadget);
	spin_lock_irqsave(&udc->lock, flags);
	syscon1 = omap_readw(UDC_SYSCON1);
	if (is_selfpowered)
		syscon1 |= UDC_SELF_PWR;
	else
		syscon1 &= ~UDC_SELF_PWR;
	omap_writew(syscon1, UDC_SYSCON1);
	spin_unlock_irqrestore(&udc->lock, flags);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 80 80.81% 1 33.33%
Peter Chen 10 10.10% 1 33.33%
Tony Lindgren 9 9.09% 1 33.33%
Total 99 100.00% 3 100.00%



static int can_pullup(struct omap_udc *udc)
{
	return udc->driver && udc->softconnect && udc->vbus_active;
}

Contributors
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David Brownell 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%



static void pullup_enable(struct omap_udc *udc)
{
	u16 w;

	w = omap_readw(UDC_SYSCON1);
	w |= UDC_PULLUP_EN;
	omap_writew(w, UDC_SYSCON1);
	if (!gadget_is_otg(&udc->gadget) && !cpu_is_omap15xx()) {
		u32 l;

		l = omap_readl(OTG_CTRL);
		l |= OTG_BSESSVLD;
		omap_writel(l, OTG_CTRL);
	}
	omap_writew(UDC_DS_CHG_IE, UDC_IRQ_EN);
}

Contributors
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Tony Lindgren 43 55.84% 1 20.00%
David Brownell 34 44.16% 4 80.00%
Total 77 100.00% 5 100.00%



static void pullup_disable(struct omap_udc *udc)
{
	u16 w;

	if (!gadget_is_otg(&udc->gadget) && !cpu_is_omap15xx()) {
		u32 l;

		l = omap_readl(OTG_CTRL);
		l &= ~OTG_BSESSVLD;
		omap_writel(l, OTG_CTRL);
	}
	omap_writew(UDC_DS_CHG_IE, UDC_IRQ_EN);
	w = omap_readw(UDC_SYSCON1);
	w &= ~UDC_PULLUP_EN;
	omap_writew(w, UDC_SYSCON1);
}

Contributors
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Tony Lindgren 43 54.43% 1 20.00%
David Brownell 36 45.57% 4 80.00%
Total 79 100.00% 5 100.00%


static struct omap_udc *udc;



static void omap_udc_enable_clock(int enable)
{
	if (udc == NULL || udc->dc_clk == NULL || udc->hhc_clk == NULL)
		return;

	if (enable) {
		clk_enable(udc->dc_clk);
		clk_enable(udc->hhc_clk);
		udelay(100);
	} else {
		clk_disable(udc->hhc_clk);
		clk_disable(udc->dc_clk);
	}
}

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David Brownell 70 100.00% 1 100.00%
Total 70 100.00% 1 100.00%

/*
 * Called by whatever detects VBUS sessions:  external transceiver
 * driver, or maybe GPIO0 VBUS IRQ.  May request 48 MHz clock.
 */


static int omap_vbus_session(struct usb_gadget *gadget, int is_active)
{
	struct omap_udc	*udc;
	unsigned long	flags;
	u32 l;

	udc = container_of(gadget, struct omap_udc, gadget);
	spin_lock_irqsave(&udc->lock, flags);
	VDBG("VBUS %s\n", is_active ? "on" : "off");
	udc->vbus_active = (is_active != 0);
	if (cpu_is_omap15xx()) {
		/* "software" detect, ignored if !VBUS_MODE_1510 */
		l = omap_readl(FUNC_MUX_CTRL_0);
		if (is_active)
			l |= VBUS_CTRL_1510;
		else
			l &= ~VBUS_CTRL_1510;
		omap_writel(l, FUNC_MUX_CTRL_0);
	}
	if (udc->dc_clk != NULL && is_active) {
		if (!udc->clk_requested) {
			omap_udc_enable_clock(1);
			udc->clk_requested = 1;
		}
	}
	if (can_pullup(udc))
		pullup_enable(udc);
	else
		pullup_disable(udc);
	if (udc->dc_clk != NULL && !is_active) {
		if (udc->clk_requested) {
			omap_udc_enable_clock(0);
			udc->clk_requested = 0;
		}
	}
	spin_unlock_irqrestore(&udc->lock, flags);
	return 0;
}

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David Brownell 181 90.50% 3 75.00%
Tony Lindgren 19 9.50% 1 25.00%
Total 200 100.00% 4 100.00%



static int omap_vbus_draw(struct usb_gadget *gadget, unsigned mA)
{
	struct omap_udc	*udc;

	udc = container_of(gadget, struct omap_udc, gadget);
	if (!IS_ERR_OR_NULL(udc->transceiver))
		return usb_phy_set_power(udc->transceiver, mA);
	return -EOPNOTSUPP;
}

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Heikki Krogerus 1 1.82% 1 33.33%
Total 55 100.00% 3 100.00%



static int omap_pullup(struct usb_gadget *gadget, int is_on)
{
	struct omap_udc	*udc;
	unsigned long	flags;

	udc = container_of(gadget, struct omap_udc, gadget);
	spin_lock_irqsave(&udc->lock, flags);
	udc->softconnect = (is_on != 0);
	if (can_pullup(udc))
		pullup_enable(udc);
	else
		pullup_disable(udc);
	spin_unlock_irqrestore(&udc->lock, flags);
	return 0;
}

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static int omap_udc_start(struct usb_gadget *g,
		struct usb_gadget_driver *driver);
static int omap_udc_stop(struct usb_gadget *g);


static const struct usb_gadget_ops omap_gadget_ops = {
	.get_frame		= omap_get_frame,
	.wakeup			= omap_wakeup,
	.set_selfpowered	= omap_set_selfpowered,
	.vbus_session		= omap_vbus_session,
	.vbus_draw		= omap_vbus_draw,
	.pullup			= omap_pullup,
	.udc_start		= omap_udc_start,
	.udc_stop		= omap_udc_stop,
};

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

/* dequeue ALL requests; caller holds udc->lock */


static void nuke(struct omap_ep *ep, int status)
{
	struct omap_req	*req;

	ep->stopped = 1;

	if (use_dma && ep->dma_channel)
		dma_channel_release(ep);

	use_ep(ep, 0);
	omap_writew(UDC_CLR_EP, UDC_CTRL);
	if (ep->bEndpointAddress && ep->bmAttributes != USB_ENDPOINT_XFER_ISOC)
		omap_writew(UDC_SET_HALT, UDC_CTRL);

	while (!list_empty(&ep->queue)) {
		req = list_entry(ep->queue.next, struct omap_req, queue);
		done(ep, req, status);
	}
}

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Total 109 100.00% 2 100.00%

/* caller holds udc->lock */


static void udc_quiesce(struct omap_udc *udc)
{
	struct omap_ep	*ep;

	udc->gadget.speed = USB_SPEED_UNKNOWN;
	nuke(&udc->ep[0], -ESHUTDOWN);
	list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list)
		nuke(ep, -ESHUTDOWN);
}

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Total 54 100.00% 1 100.00%

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



static void update_otg(struct omap_udc *udc)
{
	u16	devstat;

	if (!gadget_is_otg(&udc->gadget))
		return;

	if (omap_readl(OTG_CTRL) & OTG_ID)
		devstat = omap_readw(UDC_DEVSTAT);
	else
		devstat = 0;

	udc->gadget.b_hnp_enable = !!(devstat & UDC_B_HNP_ENABLE);
	udc->gadget.a_hnp_support = !!(devstat & UDC_A_HNP_SUPPORT);
	udc->gadget.a_alt_hnp_support = !!(devstat & UDC_A_ALT_HNP_SUPPORT);

	/* Enable HNP early, avoiding races on suspend irq path.
         * ASSUMES OTG state machine B_BUS_REQ input is true.
         */
	if (udc->gadget.b_hnp_enable) {
		u32 l;

		l = omap_readl(OTG_CTRL);
		l |= OTG_B_HNPEN | OTG_B_BUSREQ;
		l &= ~OTG_PULLUP;
		omap_writel(l, OTG_CTRL);
	}
}

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Tony Lindgren 31 24.22% 1 25.00%
Total 128 100.00% 4 100.00%



static void ep0_irq(struct omap_udc *udc, u16 irq_src)
{
	struct omap_ep	*ep0 = &udc->ep[0];
	struct omap_req	*req = NULL;

	ep0->irqs++;

	/* Clear any pending requests and then scrub any rx/tx state
         * before starting to handle the SETUP request.
         */
	if (irq_src & UDC_SETUP) {
		u16	ack = irq_src & (UDC_EP0_TX|UDC_EP0_RX);

		nuke(ep0, 0);
		if (ack) {
			omap_writew(ack, UDC_IRQ_SRC);
			irq_src = UDC_SETUP;
		}
	}

	/* IN/OUT packets mean we're in the DATA or STATUS stage.
         * This driver uses only uses protocol stalls (ep0 never halts),
         * and if we got this far the gadget driver already had a
         * chance to stall.  Tries to be forgiving of host oddities.
         *
         * NOTE:  the last chance gadget drivers have to stall control
         * requests is during their request completion callback.
         */
	if (!list_empty(&ep0->queue))
		req = container_of(ep0->queue.next, struct omap_req, queue);

	/* IN == TX to host */
	if (irq_src & UDC_EP0_TX) {
		int	stat;

		omap_writew(UDC_EP0_TX, UDC_IRQ_SRC);
		omap_writew(UDC_EP_SEL|UDC_EP_DIR, UDC_EP_NUM);
		stat = omap_readw(UDC_STAT_FLG);
		if (stat & UDC_ACK) {
			if (udc->ep0_in) {
				/* write next IN packet from response,
                                 * or set up the status stage.
                                 */
				if (req)
					stat = write_fifo(ep0, req);
				omap_writew(UDC_EP_DIR, UDC_EP_NUM);
				if (!req && udc->ep0_pending) {
					omap_writew(UDC_EP_SEL, UDC_EP_NUM);
					omap_writew(UDC_CLR_EP, UDC_CTRL);
					omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
					omap_writew(0, UDC_EP_NUM);
					udc->ep0_pending = 0;
				} /* else:  6 wait states before it'll tx */
			} else {
				/* ack status stage of OUT transfer */
				omap_writew(UDC_EP_DIR, UDC_EP_NUM);
				if (req)
					done(ep0, req, 0);
			}
			req = NULL;
		} else if (stat & UDC_STALL) {
			omap_writew(UDC_CLR_HALT, UDC_CTRL);
			omap_writew(UDC_EP_DIR, UDC_EP_NUM);
		} else {
			omap_writew(UDC_EP_DIR, UDC_EP_NUM);
		}
	}

	/* OUT == RX from host */
	if (irq_src & UDC_EP0_RX) {
		int	stat;

		omap_writew(UDC_EP0_RX, UDC_IRQ_SRC);
		omap_writew(UDC_EP_SEL, UDC_EP_NUM);
		stat = omap_readw(UDC_STAT_FLG);
		if (stat & UDC_ACK) {
			if (!udc->ep0_in) {
				stat = 0;
				/* read next OUT packet of request, maybe
                                 * reactiviting the fifo; stall on errors.
                                 */
				stat = read_fifo(ep0, req);
				if (!req || stat < 0) {
					omap_writew(UDC_STALL_CMD, UDC_SYSCON2);
					udc->ep0_pending = 0;
					stat = 0;
				} else if (stat == 0)
					omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
				omap_writew(0, UDC_EP_NUM);

				/* activate status stage */
				if (stat == 1) {
					done(ep0, req, 0);
					/* that may have STALLed ep0... */
					omap_writew(UDC_EP_SEL | UDC_EP_DIR,
							UDC_EP_NUM);
					omap_writew(UDC_CLR_EP, UDC_CTRL);
					omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
					omap_writew(UDC_EP_DIR, UDC_EP_NUM);
					udc->ep0_pending = 0;
				}
			} else {
				/* ack status stage of IN transfer */
				omap_writew(0, UDC_EP_NUM);
				if (req)
					done(ep0, req, 0);
			}
		} else if (stat & UDC_STALL) {
			omap_writew(UDC_CLR_HALT, UDC_CTRL);
			omap_writew(0, UDC_EP_NUM);
		} else {
			omap_writew(0, UDC_EP_NUM);
		}
	}

	/* SETUP starts all control transfers */
	if (irq_src & UDC_SETUP) {
		
union u {
			
u16			word[4];
			
struct usb_ctrlrequest	r;
		} u;
		int			status = -EINVAL;
		struct omap_ep		*ep;

		/* read the (latest) SETUP message */
		do {
			omap_writew(UDC_SETUP_SEL, UDC_EP_NUM);
			/* two bytes at a time */
			u.word[0] = omap_readw(UDC_DATA);
			u.word[1] = omap_readw(UDC_DATA);
			u.word[2] = omap_readw(UDC_DATA);
			u.word[3] = omap_readw(UDC_DATA);
			omap_writew(0, UDC_EP_NUM);
		} while (omap_readw(UDC_IRQ_SRC) & UDC_SETUP);


#define	w_value		le16_to_cpu(u.r.wValue)

#define	w_index		le16_to_cpu(u.r.wIndex)

#define	w_length	le16_to_cpu(u.r.wLength)

		/* Delegate almost all control requests to the gadget driver,
                 * except for a handful of ch9 status/feature requests that
                 * hardware doesn't autodecode _and_ the gadget API hides.
                 */
		udc->ep0_in = (u.r.bRequestType & USB_DIR_IN) != 0;
		udc->ep0_set_config = 0;
		udc->ep0_pending = 1;
		ep0->stopped = 0;
		ep0->ackwait = 0;
		switch (u.r.bRequest) {
		case USB_REQ_SET_CONFIGURATION:
			/* udc needs to know when ep != 0 is valid */
			if (u.r.bRequestType != USB_RECIP_DEVICE)
				goto delegate;
			if (w_length != 0)
				goto do_stall;
			udc->ep0_set_config = 1;
			udc->ep0_reset_config = (w_value == 0);
			VDBG("set config %d\n", w_value);

			/* update udc NOW since gadget driver may start
                         * queueing requests immediately; clear config
                         * later if it fails the request.
                         */
			if (udc->ep0_reset_config)
				omap_writew(UDC_CLR_CFG, UDC_SYSCON2);
			else
				omap_writew(UDC_DEV_CFG, UDC_SYSCON2);
			update_otg(udc);
			goto delegate;
		case USB_REQ_CLEAR_FEATURE:
			/* clear endpoint halt */
			if (u.r.bRequestType != USB_RECIP_ENDPOINT)
				goto delegate;
			if (w_value != USB_ENDPOINT_HALT
					|| w_length != 0)
				goto do_stall;
			ep = &udc->ep[w_index & 0xf];
			if (ep != ep0) {
				if (w_index & USB_DIR_IN)
					ep += 16;
				if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
						|| !ep->ep.desc)
					goto do_stall;
				use_ep(ep, 0);
				omap_writew(udc->clr_halt, UDC_CTRL);
				ep->ackwait = 0;
				if (!(ep->bEndpointAddress & USB_DIR_IN)) {
					omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
					ep->ackwait = 1 + ep->double_buf;
				}
				/* NOTE:  assumes the host behaves sanely,
                                 * only clearing real halts.  Else we may
                                 * need to kill pending transfers and then
                                 * restart the queue... very messy for DMA!
                                 */
			}
			VDBG("%s halt cleared by host\n", ep->name);
			goto ep0out_status_stage;
		case USB_REQ_SET_FEATURE:
			/* set endpoint halt */
			if (u.r.bRequestType != USB_RECIP_ENDPOINT)
				goto delegate;
			if (w_value != USB_ENDPOINT_HALT
					|| w_length != 0)
				goto do_stall;
			ep = &udc->ep[w_index & 0xf];
			if (w_index & USB_DIR_IN)
				ep += 16;
			if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
					|| ep == ep0 || !ep->ep.desc)
				goto do_stall;
			if (use_dma && ep->has_dma) {
				/* this has rude side-effects (aborts) and
                                 * can't really work if DMA-IN is active
                                 */
				DBG("%s host set_halt, NYET\n", ep->name);
				goto do_stall;
			}
			use_ep(ep, 0);
			/* can't halt if fifo isn't empty... */
			omap_writew(UDC_CLR_EP, UDC_CTRL);
			omap_writew(UDC_SET_HALT, UDC_CTRL);
			VDBG("%s halted by host\n", ep->name);
ep0out_status_stage:
			status = 0;
			omap_writew(UDC_EP_SEL|UDC_EP_DIR, UDC_EP_NUM);
			omap_writew(UDC_CLR_EP, UDC_CTRL);
			omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
			omap_writew(UDC_EP_DIR, UDC_EP_NUM);
			udc->ep0_pending = 0;
			break;
		case USB_REQ_GET_STATUS:
			/* USB_ENDPOINT_HALT status? */
			if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT))
				goto intf_status;

			/* ep0 never stalls */
			if (!(w_index & 0xf))
				goto zero_status;

			/* only active endpoints count */
			ep = &udc->ep[w_index & 0xf];
			if (w_index & USB_DIR_IN)
				ep += 16;
			if (!ep->ep.desc)
				goto do_stall;

			/* iso never stalls */
			if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
				goto zero_status;

			/* FIXME don't assume non-halted endpoints!! */
			ERR("%s status, can't report\n", ep->ep.name);
			goto do_stall;

intf_status:
			/* return interface status.  if we were pedantic,
                         * we'd detect non-existent interfaces, and stall.
                         */
			if (u.r.bRequestType
					!= (USB_DIR_IN|USB_RECIP_INTERFACE))
				goto delegate;

zero_status:
			/* return two zero bytes */
			omap_writew(UDC_EP_SEL|UDC_EP_DIR, UDC_EP_NUM);
			omap_writew(0, UDC_DATA);
			omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
			omap_writew(UDC_EP_DIR, UDC_EP_NUM);
			status = 0;
			VDBG("GET_STATUS, interface %d\n", w_index);
			/* next, status stage */
			break;
		default:
delegate:
			/* activate the ep0out fifo right away */
			if (!udc->ep0_in && w_length) {
				omap_writew(0, UDC_EP_NUM);
				omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
			}

			/* gadget drivers see class/vendor specific requests,
                         * {SET,GET}_{INTERFACE,DESCRIPTOR,CONFIGURATION},
                         * and more
                         */
			VDBG("SETUP %02x.%02x v%04x i%04x l%04x\n",
				u.r.bRequestType, u.r.bRequest,
				w_value, w_index, w_length);

#undef	w_value
#undef	w_index
#undef	w_length

			/* The gadget driver may return an error here,
                         * causing an immediate protocol stall.
                         *
                         * Else it must issue a response, either queueing a
                         * response buffer for the DATA stage, or halting ep0
                         * (causing a protocol stall, not a real halt).  A
                         * zero length buffer means no DATA stage.
                         *
                         * It's fine to issue that response after the setup()
                         * call returns, and this IRQ was handled.
                         */
			udc->ep0_setup = 1;
			spin_unlock(&udc->lock);
			status = udc->driver->setup(&udc->gadget, &u.r);
			spin_lock(&udc->lock);
			udc->ep0_setup = 0;
		}

		if (status < 0) {
do_stall:
			VDBG("req %02x.%02x protocol STALL; stat %d\n",
					u.r.bRequestType, u.r.bRequest, status);
			if (udc->ep0_set_config) {
				if (udc->ep0_reset_config)
					WARNING("error resetting config?\n");
				else
					omap_writew(UDC_CLR_CFG, UDC_SYSCON2);
			}
			omap_writew(UDC_STALL_CMD, UDC_SYSCON2);
			udc->ep0_pending = 0;
		}
	}
}

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David Brownell 1157 81.19% 7 63.64%
Tony Lindgren 253 17.75% 1 9.09%
Felipe Balbi 8 0.56% 1 9.09%
Ido Shayevitz 6 0.42% 1 9.09%
Arjan van de Ven 1 0.07% 1 9.09%
Total 1425 100.00% 11 100.00%

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


#define OTG_FLAGS (UDC_B_HNP_ENABLE|UDC_A_HNP_SUPPORT|UDC_A_ALT_HNP_SUPPORT)



static void devstate_irq(struct omap_udc *udc, u16 irq_src)
{
	u16	devstat, change;

	devstat = omap_readw(UDC_DEVSTAT);
	change = devstat ^ udc->devstat;
	udc->devstat = devstat;

	if (change & (UDC_USB_RESET|UDC_ATT)) {
		udc_quiesce(udc);

		if (change & UDC_ATT) {
			/* driver for any external transceiver will
                         * have called omap_vbus_session() already
                         */
			if (devstat & UDC_ATT) {
				udc->gadget.speed = USB_SPEED_FULL;
				VDBG("connect\n");
				if (IS_ERR_OR_NULL(udc->transceiver))
					pullup_enable(udc);
				/* if (driver->connect) call it */
			} else if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
				udc->gadget.speed = USB_SPEED_UNKNOWN;
				if (IS_ERR_OR_NULL(udc->transceiver))
					pullup_disable(udc);
				DBG("disconnect, gadget %s\n",
					udc->driver->driver.name);
				if (udc->driver->disconnect) {
					spin_unlock(&udc->lock);
					udc->driver->disconnect(&udc->gadget);
					spin_lock(&udc->lock);
				}
			}
			change &= ~UDC_ATT;
		}

		if (change & UDC_USB_RESET) {
			if (devstat & UDC_USB_RESET) {
				VDBG("RESET=1\n");
			} else {
				udc->gadget.speed = USB_SPEED_FULL;
				INFO("USB reset done, gadget %s\n",
					udc->driver->driver.name);
				/* ep0 traffic is legal from now on */
				omap_writew(UDC_DS_CHG_IE | UDC_EP0_IE,
						UDC_IRQ_EN);
			}
			change &= ~UDC_USB_RESET;
		}
	}
	if (change & UDC_SUS) {
		if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
			/* FIXME tell isp1301 to suspend/resume (?) */
			if (devstat & UDC_SUS) {
				VDBG("suspend\n");
				update_otg(udc);
				/* HNP could be under way already */
				if (udc->gadget.speed == USB_SPEED_FULL
						&& udc->driver->suspend) {
					spin_unlock(&udc->lock);
					udc->driver->suspend(&udc->gadget);
					spin_lock(&udc->lock);
				}
				if (!IS_ERR_OR_NULL(udc->transceiver))
					usb_phy_set_suspend(
							udc->transceiver, 1);
			} else {
				VDBG("resume\n");
				if (!IS_ERR_OR_NULL(udc->transceiver))
					usb_phy_set_suspend(
							udc->transceiver, 0);
				if (udc->gadget.speed == USB_SPEED_FULL
						&& udc->driver->resume) {
					spin_unlock(&udc->lock);
					udc->driver->resume(&udc->gadget);
					spin_lock(&udc->lock);
				}
			}
		}
		change &= ~UDC_SUS;
	}
	if (!cpu_is_omap15xx() && (change & OTG_FLAGS)) {
		update_otg(udc);
		change &= ~OTG_FLAGS;
	}

	change &= ~(UDC_CFG|UDC_DEF|UDC_ADD);
	if (change)
		VDBG("devstat %03x, ignore change %03x\n",
			devstat,  change);

	omap_writew(UDC_DS_CHG, UDC_IRQ_SRC);
}

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David Brownell 431 87.78% 2 28.57%
Juha Yrjölä 28 5.70% 1 14.29%
Tony Lindgren 14 2.85% 1 14.29%
Kishon Vijay Abraham I 14 2.85% 1 14.29%
Heikki Krogerus 2 0.41% 1 14.29%
Felipe Balbi 2 0.41% 1 14.29%
Total 491 100.00% 7 100.00%



static irqreturn_t omap_udc_irq(int irq, void *_udc)
{
	struct omap_udc	*udc = _udc;
	u16		irq_src;
	irqreturn_t	status = IRQ_NONE;
	unsigned long	flags;

	spin_lock_irqsave(&udc->lock, flags);
	irq_src = omap_readw(UDC_IRQ_SRC);

	/* Device state change (usb ch9 stuff) */
	if (irq_src & UDC_DS_CHG) {
		devstate_irq(_udc, irq_src);
		status = IRQ_HANDLED;
		irq_src &= ~UDC_DS_CHG;
	}

	/* EP0 control transfers */
	if (irq_src & (UDC_EP0_RX|UDC_SETUP|UDC_EP0_TX)) {
		ep0_irq(_udc, irq_src);
		status = IRQ_HANDLED;
		irq_src &= ~(UDC_EP0_RX|UDC_SETUP|UDC_EP0_TX);
	}

	/* DMA transfer completion */
	if (use_dma && (irq_src & (UDC_TXN_DONE|UDC_RXN_CNT|UDC_RXN_EOT))) {
		dma_irq(_udc, irq_src);
		status = IRQ_HANDLED;
		irq_src &= ~(UDC_TXN_DONE|UDC_RXN_CNT|UDC_RXN_EOT);
	}

	irq_src &= ~(UDC_IRQ_SOF | UDC_EPN_TX|UDC_EPN_RX);
	if (irq_src)
		DBG("udc_irq, unhandled %03x\n", irq_src);
	spin_unlock_irqrestore(&udc->lock, flags);

	return status;
}

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David Brownell 182 97.33% 1 50.00%
Tony Lindgren 5 2.67% 1 50.00%
Total 187 100.00% 2 100.00%

/* workaround for seemingly-lost IRQs for RX ACKs... */

#define PIO_OUT_TIMEOUT	(jiffies + HZ/3)

#define HALF_FULL(f)	(!((f)&(UDC_NON_ISO_FIFO_FULL|UDC_NON_ISO_FIFO_EMPTY)))



static void pio_out_timer(struct timer_list *t)
{
	struct omap_ep	*ep = from_timer(ep, t, timer);
	unsigned long	flags;
	u16		stat_flg;

	spin_lock_irqsave(&ep->udc->lock, flags);
	if (!list_empty(&ep->queue) && ep->ackwait) {
		use_ep(ep, UDC_EP_SEL);
		stat_flg = omap_readw(UDC_STAT_FLG);

		if ((stat_flg & UDC_ACK) && (!(stat_flg & UDC_FIFO_EN)
				|| (ep->double_buf && HALF_FULL(stat_flg)))) {
			struct omap_req	*req;

			VDBG("%s: lose, %04x\n", ep->ep.name, stat_flg);
			req = container_of(ep->queue.next,
					struct omap_req, queue);
			(void) read_fifo(ep, req);
			omap_writew(ep->bEndpointAddress, UDC_EP_NUM);
			omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
			ep->ackwait = 1 + ep->double_buf;
		} else
			deselect_ep();
	}
	mod_timer(&ep->timer, PIO_OUT_TIMEOUT);
	spin_unlock_irqrestore(&ep->udc->lock, flags);
}

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Tony Lindgren 14 6.97% 1 25.00%
Kees Cook 12 5.97% 1 25.00%
Total 201 100.00% 4 100.00%



static irqreturn_t omap_udc_pio_irq(int irq, void *_dev)
{
	u16		epn_stat, irq_src;
	irqreturn_t	status = IRQ_NONE;
	struct omap_ep	*ep;
	int		epnum;
	struct omap_udc	*udc = _dev;
	struct omap_req	*req;
	unsigned long	flags;

	spin_lock_irqsave(&udc->lock, flags);
	epn_stat = omap_readw(UDC_EPN_STAT);
	irq_src = omap_readw(UDC_IRQ_SRC);

	/* handle OUT first, to avoid some wasteful NAKs */
	if (irq_src & UDC_EPN_RX) {
		epnum = (epn_stat >> 8) & 0x0f;
		omap_writew(UDC_EPN_RX, UDC_IRQ_SRC);
		status = IRQ_HANDLED;
		ep = &udc->ep[epnum];
		ep->irqs++;

		omap_writew(epnum | UDC_EP_SEL, UDC_EP_NUM);
		ep->fnf = 0;
		if (omap_readw(UDC_STAT_FLG) & UDC_ACK) {
			ep->ackwait--;
			if (!list_empty(&ep->queue)) {
				int stat;
				req = container_of(ep->queue.next,
						struct omap_req, queue);
				stat = read_fifo(ep, req);
				if (!ep->double_buf)
					ep->fnf = 1;
			}
		}
		/* min 6 clock delay before clearing EP_SEL ... */
		epn_stat = omap_readw(UDC_EPN_STAT);
		epn_stat = omap_readw(UDC_EPN_STAT);
		omap_writew(epnum, UDC_EP_NUM);

		/* enabling fifo _after_ clearing ACK, contrary to docs,
                 * reduces lossage; timer still needed though (sigh).
                 */
		if (ep->fnf) {
			omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
			ep->ackwait = 1 + ep->double_buf;
		}
		mod_timer(&ep->timer, PIO_OUT_TIMEOUT);
	}

	/* then IN transfers */
	else if (irq_src & UDC_EPN_TX) {
		epnum = epn_stat & 0x0f;
		omap_writew(UDC_EPN_TX, UDC_IRQ_SRC);
		status = IRQ_HANDLED;
		ep = &udc->ep[16 + epnum];
		ep->irqs++;

		omap_writew(epnum | UDC_EP_DIR | UDC_EP_SEL, UDC_EP_NUM);
		if (omap_readw(UDC_STAT_FLG) & UDC_ACK) {
			ep->ackwait = 0;
			if (!list_empty(&ep->queue)) {
				req = container_of(ep->queue.next,
						struct omap_req, queue);
				(void) write_fifo(ep, req);
			}
		}
		/* min 6 clock delay before clearing EP_SEL ... */
		epn_stat = omap_readw(UDC_EPN_STAT);
		epn_stat = omap_readw(UDC_EPN_STAT);
		omap_writew(epnum | UDC_EP_DIR, UDC_EP_NUM);
		/* then 6 clocks before it'd tx */
	}

	spin_unlock_irqrestore(&udc->lock, flags);
	return status;
}

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David Brownell 341 83.58% 2 66.67%
Tony Lindgren 67 16.42% 1 33.33%
Total 408 100.00% 3 100.00%

#ifdef	USE_ISO


static irqreturn_t omap_udc_iso_irq(int irq, void *_dev)
{
	struct omap_udc	*udc = _dev;
	struct omap_ep	*ep;
	int		pending = 0;
	unsigned long	flags;

	spin_lock_irqsave(&udc->lock, flags);

	/* handle all non-DMA ISO transfers */
	list_for_each_entry(ep, &udc->iso, iso) {
		u16		stat;
		struct omap_req	*req;

		if (ep->has_dma || list_empty(&ep->queue))
			continue;
		req = list_entry(ep->queue.next, struct omap_req, queue);

		use_ep(ep, UDC_EP_SEL);
		stat = omap_readw(UDC_STAT_FLG);

		/* NOTE: like the other controller drivers, this isn't
                 * currently reporting lost or damaged frames.
                 */
		if (ep->bEndpointAddress & USB_DIR_IN) {
			if (stat & UDC_MISS_IN)
				/* done(ep, req, -EPROTO) */;
			else
				write_fifo(ep, req);
		} else {
			int	status = 0;

			if (stat & UDC_NO_RXPACKET)
				status = -EREMOTEIO;
			else if (stat & UDC_ISO_ERR)
				status = -EILSEQ;
			else if (stat & UDC_DATA_FLUSH)
				status = -ENOSR;

			if (status)
				/* done(ep, req, status) */;
			else
				read_fifo(ep, req);
		}
		deselect_ep();
		/* 6 wait states before next EP */

		ep->irqs++;
		if (!list_empty(&ep->queue))
			pending = 1;
	}
	if (!pending) {
		u16 w;

		w = omap_readw(UDC_IRQ_EN);
		w &= ~UDC_SOF_IE;
		omap_writew(w, UDC_IRQ_EN);
	}
	omap_writew(UDC_IRQ_SOF, UDC_IRQ_SRC);

	spin_unlock_irqrestore(&udc->lock, flags);
	return IRQ_HANDLED;
}
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Tony Lindgren 30 11.32% 1 50.00%
Total 265 100.00% 2 100.00%

#endif

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



static inline int machine_without_vbus_sense(void)
{
	return machine_is_omap_innovator()
		|| machine_is_omap_osk()
		|| machine_is_sx1()
		/* No known omap7xx boards with vbus sense */
		|| cpu_is_omap7xx();
}

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Cory Maccarrone 3 13.04% 1 20.00%
Felipe Balbi 1 4.35% 1 20.00%
Total 23 100.00% 5 100.00%



static int omap_udc_start(struct usb_gadget *g,
		struct usb_gadget_driver *driver)
{
	int		status = -ENODEV;
	struct omap_ep	*ep;
	unsigned long	flags;


	spin_lock_irqsave(&udc->lock, flags);
	/* reset state */
	list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
		ep->irqs = 0;
		if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
			continue;
		use_ep(ep, 0);
		omap_writew(UDC_SET_HALT, UDC_CTRL);
	}
	udc->ep0_pending = 0;
	udc->ep[0].irqs = 0;
	udc->softconnect = 1;

	/* hook up the driver */
	driver->driver.bus = NULL;
	udc->driver = driver;
	spin_unlock_irqrestore(&udc->lock, flags);

	if (udc->dc_clk != NULL)
		omap_udc_enable_clock(1);

	omap_writew(UDC_IRQ_SRC_MASK, UDC_IRQ_SRC);

	/* connect to bus through transceiver */
	if (!IS_ERR_OR_NULL(udc->transceiver)) {
		status = otg_set_peripheral(udc->transceiver->otg,
						&udc->gadget);
		if (status < 0) {
			ERR("can't bind to transceiver\n");
			udc->driver = NULL;
			goto done;
		}
	} else {
		if (can_pullup(udc))
			pullup_enable(udc);
		else
			pullup_disable(udc);
	}

	/* boards that don't have VBUS sensing can't autogate 48MHz;
         * can't enter deep sleep while a gadget driver is active.
         */
	if (machine_without_vbus_sense())
		omap_vbus_session(&udc->gadget, 1);

done:
	if (udc->dc_clk != NULL)
		omap_udc_enable_clock(0);

	return status;
}

Contributors
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David Brownell 229 89.80% 6 46.15%
Tony Lindgren 10 3.92% 1 7.69%
Sebastian Andrzej Siewior 6 2.35% 2 15.38%
Kishon Vijay Abraham I 4 1.57% 1 7.69%
Heikki Krogerus 2 0.78% 1 7.69%
Uwe Kleine-König 2 0.78% 1 7.69%
Felipe Balbi 2 0.78% 1 7.69%
Total 255 100.00% 13 100.00%



static int omap_udc_stop(struct usb_gadget *g)
{
	unsigned long	flags;
	int		status = -ENODEV;

	if (udc->dc_clk != NULL)
		omap_udc_enable_clock(1);

	if (machine_without_vbus_sense())
		omap_vbus_session(&udc->gadget, 0);

	if (!IS_ERR_OR_NULL(udc->transceiver))
		(void) otg_set_peripheral(udc->transceiver->otg, NULL);
	else
		pullup_disable(udc);

	spin_lock_irqsave(&udc->lock, flags);
	udc_quiesce(udc);
	spin_unlock_irqrestore(&udc->lock, flags);

	udc->driver = NULL;

	if (udc->dc_clk != NULL)
		omap_udc_enable_clock(0);

	return status;
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 115 91.27% 6 60.00%
Kishon Vijay Abraham I 4 3.17% 1 10.00%
Felipe Balbi 3 2.38% 1 10.00%
Sebastian Andrzej Siewior 2 1.59% 1 10.00%
Heikki Krogerus 2 1.59% 1 10.00%
Total 126 100.00% 10 100.00%

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

#ifdef CONFIG_USB_GADGET_DEBUG_FILES

#include <linux/seq_file.h>


static const char proc_filename[] = "driver/udc";


#define FOURBITS "%s%s%s%s"

#define EIGHTBITS "%s%s%s%s%s%s%s%s"



static void proc_ep_show(struct seq_file *s, struct omap_ep *ep)
{
	u16		stat_flg;
	struct omap_req	*req;
	char		buf[20];

	use_ep(ep, 0);

	if (use_dma && ep->has_dma)
		snprintf(buf, sizeof buf, "(%cxdma%d lch%d) ",
			(ep->bEndpointAddress & USB_DIR_IN) ? 't' : 'r',
			ep->dma_channel - 1, ep->lch);
	else
		buf[0] = 0;

	stat_flg = omap_readw(UDC_STAT_FLG);
	seq_printf(s,
		"\n%s %s%s%sirqs %ld stat %04x " EIGHTBITS FOURBITS "%s\n",
		ep->name, buf,
		ep->double_buf ? "dbuf " : "",
		({ char *s;
                switch (ep->ackwait) {
                case 0:
                        s = "";
                        break;
                case 1:
                        s = "(ackw) ";
                        break;
                case 2:
                        s = "(ackw2) ";
                        break;
                default:
                        s = "(?) ";
                        break;
                } s; }),
		ep->irqs, stat_flg,
		(stat_flg & UDC_NO_RXPACKET) ? "no_rxpacket " : "",
		(stat_flg & UDC_MISS_IN) ? "miss_in " : "",
		(stat_flg & UDC_DATA_FLUSH) ? "data_flush " : "",
		(stat_flg & UDC_ISO_ERR) ? "iso_err " : "",
		(stat_flg & UDC_ISO_FIFO_EMPTY) ? "iso_fifo_empty " : "",
		(stat_flg & UDC_ISO_FIFO_FULL) ? "iso_fifo_full " : "",
		(stat_flg & UDC_EP_HALTED) ? "HALT " : "",
		(stat_flg & UDC_STALL) ? "STALL " : "",
		(stat_flg & UDC_NAK) ? "NAK " : "",
		(stat_flg & UDC_ACK) ? "ACK " : "",
		(stat_flg & UDC_FIFO_EN) ? "fifo_en " : "",
		(stat_flg & UDC_NON_ISO_FIFO_EMPTY) ? "fifo_empty " : "",
		(stat_flg & UDC_NON_ISO_FIFO_FULL) ? "fifo_full " : "");

	if (list_empty(&ep->queue))
		seq_printf(s, "\t(queue empty)\n");
	else
		list_for_each_entry(req, &ep->queue, queue) {
			unsigned	length = req->req.actual;

			if (use_dma && buf[0]) {
				length += ((ep->bEndpointAddress & USB_DIR_IN)
						? dma_src_len : dma_dest_len)
					(ep, req->req.dma + length);
				buf[0] = 0;
			}
			seq_printf(s, "\treq %p len %d/%d buf %p\n",
					&req->req, length,
					req->req.length, req->req.buf);
		}
}

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David Brownell 291 96.04% 2 50.00%
Felipe Balbi 8 2.64% 1 25.00%
Tony Lindgren 4 1.32% 1 25.00%
Total 303 100.00% 4 100.00%



static char *trx_mode(unsigned m, int enabled)
{
	switch (m) {
	case 0:
		return enabled ? "*6wire" : "unused";
	case 1:
		return "4wire";
	case 2:
		return "3wire";
	case 3:
		return "6wire";
	default:
		return "unknown";
	}
}

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David Brownell 51 100.00% 2 100.00%
Total 51 100.00% 2 100.00%



static int proc_otg_show(struct seq_file *s)
{
	u32		tmp;
	u32		trans = 0;
	char		*ctrl_name = "(UNKNOWN)";

	tmp = omap_readl(OTG_REV);
	ctrl_name = "tranceiver_ctrl";
	trans = omap_readw(USB_TRANSCEIVER_CTRL);
	seq_printf(s, "\nOTG rev %d.%d, %s %05x\n",
		tmp >> 4, tmp & 0xf, ctrl_name, trans);
	tmp = omap_readw(OTG_SYSCON_1);
	seq_printf(s, "otg_syscon1 %08x usb2 %s, usb1 %s, usb0 %s,"
			FOURBITS "\n", tmp,
		trx_mode(USB2_TRX_MODE(tmp), trans & CONF_USB2_UNI_R),
		trx_mode(USB1_TRX_MODE(tmp), trans & CONF_USB1_UNI_R),
		(USB0_TRX_MODE(tmp) == 0 && !cpu_is_omap1710())
			? "internal"
			: trx_mode(USB0_TRX_MODE(tmp), 1),
		(tmp & OTG_IDLE_EN) ? " !otg" : "",
		(tmp & HST_IDLE_EN) ? " !host" : "",
		(tmp & DEV_IDLE_EN) ? " !dev" : "",
		(tmp & OTG_RESET_DONE) ? " reset_done" : " reset_active");
	tmp = omap_readl(OTG_SYSCON_2);
	seq_printf(s, "otg_syscon2 %08x%s" EIGHTBITS
			" b_ase_brst=%d hmc=%d\n", tmp,
		(tmp & OTG_EN) ? " otg_en" : "",
		(tmp & USBX_SYNCHRO) ? " synchro" : "",
		/* much more SRP stuff */
		(tmp & SRP_DATA) ? " srp_data" : "",
		(tmp & SRP_VBUS) ? " srp_vbus" : "",
		(tmp & OTG_PADEN) ? " otg_paden" : "",
		(tmp & HMC_PADEN) ? " hmc_paden" : "",
		(tmp & UHOST_EN) ? " uhost_en" : "",
		(tmp & HMC_TLLSPEED) ? " tllspeed" : "",
		(tmp & HMC_TLLATTACH) ? " tllattach" : "",
		B_ASE_BRST(tmp),
		OTG_HMC(tmp));
	tmp = omap_readl(OTG_CTRL);
	seq_printf(s, "otg_ctrl    %06x" EIGHTBITS EIGHTBITS "%s\n", tmp,
		(tmp & OTG_ASESSVLD) ? " asess" : "",
		(tmp & OTG_BSESSEND) ? " bsess_end" : "",
		(tmp & OTG_BSESSVLD) ? " bsess" : "",
		(tmp & OTG_VBUSVLD) ? " vbus" : "",
		(tmp & OTG_ID) ? " id" : "",
		(tmp & OTG_DRIVER_SEL) ? " DEVICE" : " HOST",
		(tmp & OTG_A_SETB_HNPEN) ? " a_setb_hnpen" : "",
		(tmp & OTG_A_BUSREQ) ? " a_bus" : "",
		(tmp & OTG_B_HNPEN) ? " b_hnpen" : "",
		(tmp & OTG_B_BUSREQ) ? " b_bus" : "",
		(tmp & OTG_BUSDROP) ? " busdrop" : "",
		(tmp & OTG_PULLDOWN) ? " down" : "",
		(tmp & OTG_PULLUP) ? " up" : "",
		(tmp & OTG_DRV_VBUS) ? " drv" : "",
		(tmp & OTG_PD_VBUS) ? " pd_vb" : "",
		(tmp & OTG_PU_VBUS) ? " pu_vb" : "",
		(tmp & OTG_PU_ID) ? " pu_id" : ""
		);
	tmp = omap_readw(OTG_IRQ_EN);
	seq_printf(s, "otg_irq_en  %04x" "\n", tmp);
	tmp = omap_readw(OTG_IRQ_SRC);
	seq_printf(s, "otg_irq_src %04x" "\n", tmp);
	tmp = omap_readw(OTG_OUTCTRL);
	seq_printf(s, "otg_outctrl %04x" "\n", tmp);
	tmp = omap_readw(OTG_TEST);
	seq_printf(s, "otg_test    %04x" "\n", tmp);
	return 0;
}

Contributors
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David Brownell 421 91.13% 6 60.00%
Tony Lindgren 32 6.93% 1 10.00%
Paul Walmsley 4 0.87% 1 10.00%
Dmitry Baryshkov 4 0.87% 1 10.00%
Felipe Balbi 1 0.22% 1 10.00%
Total 462 100.00% 10 100.00%



static int proc_udc_show(struct seq_file *s, void *_)
{
	u32		tmp;
	struct omap_ep	*ep;
	unsigned long	flags;

	spin_lock_irqsave(&udc->lock, flags);

	seq_printf(s, "%s, version: " DRIVER_VERSION
#ifdef	USE_ISO
		" (iso)"
#endif
		"%s\n",
		driver_desc,
		use_dma ?  " (dma)" : "");

	tmp = omap_readw(UDC_REV) & 0xff;
	seq_printf(s,
		"UDC rev %d.%d, fifo mode %d, gadget %s\n"
		"hmc %d, transceiver %s\n",
		tmp >> 4, tmp & 0xf,
		fifo_mode,
		udc->driver ? udc->driver->driver.name : "(none)",
		HMC,
		udc->transceiver
			? udc->transceiver->label
			: (cpu_is_omap1710()
				? "external" : "(none)"));
	seq_printf(s, "ULPD control %04x req %04x status %04x\n",
		omap_readw(ULPD_CLOCK_CTRL),
		omap_readw(ULPD_SOFT_REQ),
		omap_readw(ULPD_STATUS_REQ));

	/* OTG controller registers */
	if (!cpu_is_omap15xx())
		proc_otg_show(s);

	tmp = omap_readw(UDC_SYSCON1);
	seq_printf(s, "\nsyscon1     %04x" EIGHTBITS "\n", tmp,
		(tmp & UDC_CFG_LOCK) ? " cfg_lock" : "",
		(tmp & UDC_DATA_ENDIAN) ? " data_endian" : "",
		(tmp & UDC_DMA_ENDIAN) ? " dma_endian" : "",
		(tmp & UDC_NAK_EN) ? " nak" : "",
		(tmp & UDC_AUTODECODE_DIS) ? " autodecode_dis" : "",
		(tmp & UDC_SELF_PWR) ? " self_pwr" : "",
		(tmp & UDC_SOFF_DIS) ? " soff_dis" : "",
		(tmp & UDC_PULLUP_EN) ? " PULLUP" : "");
	/* syscon2 is write-only */

	/* UDC controller registers */
	if (!(tmp & UDC_PULLUP_EN)) {
		seq_printf(s, "(suspended)\n");
		spin_unlock_irqrestore(&udc->lock, flags);
		return 0;
	}

	tmp = omap_readw(UDC_DEVSTAT);
	seq_printf(s, "devstat     %04x" EIGHTBITS "%s%s\n", tmp,
		(tmp & UDC_B_HNP_ENABLE) ? " b_hnp" : "",
		(tmp & UDC_A_HNP_SUPPORT) ? " a_hnp" : "",
		(tmp & UDC_A_ALT_HNP_SUPPORT) ? " a_alt_hnp" : "",
		(tmp & UDC_R_WK_OK) ? " r_wk_ok" : "",
		(tmp & UDC_USB_RESET) ? " usb_reset" : "",
		(tmp & UDC_SUS) ? " SUS" : "",
		(tmp & UDC_CFG) ? " CFG" : "",
		(tmp & UDC_ADD) ? " ADD" : "",
		(tmp & UDC_DEF) ? " DEF" : "",
		(tmp & UDC_ATT) ? " ATT" : "");
	seq_printf(s, "sof         %04x\n", omap_readw(UDC_SOF));
	tmp = omap_readw(UDC_IRQ_EN);
	seq_printf(s, "irq_en      %04x" FOURBITS "%s\n", tmp,
		(tmp & UDC_SOF_IE) ? " sof" : "",
		(tmp & UDC_EPN_RX_IE) ? " epn_rx" : "",
		(tmp & UDC_EPN_TX_IE) ? " epn_tx" : "",
		(tmp & UDC_DS_CHG_IE) ? " ds_chg" : "",
		(tmp & UDC_EP0_IE) ? " ep0" : "");
	tmp = omap_readw(UDC_IRQ_SRC);
	seq_printf(s, "irq_src     %04x" EIGHTBITS "%s%s\n", tmp,
		(tmp & UDC_TXN_DONE) ? " txn_done" : "",
		(tmp & UDC_RXN_CNT) ? " rxn_cnt" : "",
		(tmp & UDC_RXN_EOT) ? " rxn_eot" : "",
		(tmp & UDC_IRQ_SOF) ? " sof" : "",
		(tmp & UDC_EPN_RX) ? " epn_rx" : "",
		(tmp & UDC_EPN_TX) ? " epn_tx" : "",
		(tmp & UDC_DS_CHG) ? " ds_chg" : "",
		(tmp & UDC_SETUP) ? " setup" : "",
		(tmp & UDC_EP0_RX) ? " ep0out" : "",
		(tmp & UDC_EP0_TX) ? " ep0in" : "");
	if (use_dma) {
		unsigned i;

		tmp = omap_readw(UDC_DMA_IRQ_EN);
		seq_printf(s, "dma_irq_en  %04x%s" EIGHTBITS "\n", tmp,
			(tmp & UDC_TX_DONE_IE(3)) ? " tx2_done" : "",
			(tmp & UDC_RX_CNT_IE(3)) ? " rx2_cnt" : "",
			(tmp & UDC_RX_EOT_IE(3)) ? " rx2_eot" : "",

			(tmp & UDC_TX_DONE_IE(2)) ? " tx1_done" : "",
			(tmp & UDC_RX_CNT_IE(2)) ? " rx1_cnt" : "",
			(tmp & UDC_RX_EOT_IE(2)) ? " rx1_eot" : "",

			(tmp & UDC_TX_DONE_IE(1)) ? " tx0_done" : "",
			(tmp & UDC_RX_CNT_IE(1)) ? " rx0_cnt" : "",
			(tmp & UDC_RX_EOT_IE(1)) ? " rx0_eot" : "");

		tmp = omap_readw(UDC_RXDMA_CFG);
		seq_printf(s, "rxdma_cfg   %04x\n", tmp);
		if (tmp) {
			for (i = 0; i < 3; i++) {
				if ((tmp & (0x0f << (i * 4))) == 0)
					continue;
				seq_printf(s, "rxdma[%d]    %04x\n", i,
						omap_readw(UDC_RXDMA(i + 1)));
			}
		}
		tmp = omap_readw(UDC_TXDMA_CFG);
		seq_printf(s, "txdma_cfg   %04x\n", tmp);
		if (tmp) {
			for (i = 0; i < 3; i++) {
				if (!(tmp & (0x0f << (i * 4))))
					continue;
				seq_printf(s, "txdma[%d]    %04x\n", i,
						omap_readw(UDC_TXDMA(i + 1)));
			}
		}
	}

	tmp = omap_readw(UDC_DEVSTAT);
	if (tmp & UDC_ATT) {
		proc_ep_show(s, &udc->ep[0]);
		if (tmp & UDC_ADD) {
			list_for_each_entry(ep, &udc->gadget.ep_list,
					ep.ep_list) {
				if (ep->ep.desc)
					proc_ep_show(s, ep);
			}
		}
	}
	spin_unlock_irqrestore(&udc->lock, flags);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 915 94.33% 4 57.14%
Tony Lindgren 52 5.36% 1 14.29%
Ido Shayevitz 2 0.21% 1 14.29%
Felipe Balbi 1 0.10% 1 14.29%
Total 970 100.00% 7 100.00%



static int proc_udc_open(struct inode *inode, struct file *file)
{
	return single_open(file, proc_udc_show, NULL);
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 26 100.00% 2 100.00%
Total 26 100.00% 2 100.00%


static const struct file_operations proc_ops = {
	.owner		= THIS_MODULE,
	.open		= proc_udc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};



static void create_proc_file(void)
{
	proc_create(proc_filename, 0, NULL, &proc_ops);
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 17 85.00% 1 50.00%
Denis V. Lunev 3 15.00% 1 50.00%
Total 20 100.00% 2 100.00%



static void remove_proc_file(void)
{
	remove_proc_entry(proc_filename, NULL);
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 15 100.00% 2 100.00%
Total 15 100.00% 2 100.00%

#else



static inline void create_proc_file(void) {}
Contributors
Person Tokens Prop Commits CommitProp
David Brownell 8 100.00% 1 100.00%
Total 8 100.00% 1 100.00%



static inline void remove_proc_file(void) {}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 8 100.00% 1 100.00%
Total 8 100.00% 1 100.00%

#endif

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

/* Before this controller can enumerate, we need to pick an endpoint
 * configuration, or "fifo_mode"  That involves allocating 2KB of packet
 * buffer space among the endpoints we'll be operating.
 *
 * NOTE: as of OMAP 1710 ES2.0, writing a new endpoint config when
 * UDC_SYSCON_1.CFG_LOCK is set can now work.  We won't use that
 * capability yet though.
 */

static unsigned

omap_ep_setup(char *name, u8 addr, u8 type,
		unsigned buf, unsigned maxp, int dbuf)
{
	struct omap_ep	*ep;
	u16		epn_rxtx = 0;

	/* OUT endpoints first, then IN */
	ep = &udc->ep[addr & 0xf];
	if (addr & USB_DIR_IN)
		ep += 16;

	/* in case of ep init table bugs */
	BUG_ON(ep->name[0]);

	/* chip setup ... bit values are same for IN, OUT */
	if (type == USB_ENDPOINT_XFER_ISOC) {
		switch (maxp) {
		case 8:
			epn_rxtx = 0 << 12;
			break;
		case 16:
			epn_rxtx = 1 << 12;
			break;
		case 32:
			epn_rxtx = 2 << 12;
			break;
		case 64:
			epn_rxtx = 3 << 12;
			break;
		case 128:
			epn_rxtx = 4 << 12;
			break;
		case 256:
			epn_rxtx = 5 << 12;
			break;
		case 512:
			epn_rxtx = 6 << 12;
			break;
		default:
			BUG();
		}
		epn_rxtx |= UDC_EPN_RX_ISO;
		dbuf = 1;
	} else {
		/* double-buffering "not supported" on 15xx,
                 * and ignored for PIO-IN on newer chips
                 * (for more reliable behavior)
                 */
		if (!use_dma || cpu_is_omap15xx())
			dbuf = 0;

		switch (maxp) {
		case 8:
			epn_rxtx = 0 << 12;
			break;
		case 16:
			epn_rxtx = 1 << 12;
			break;
		case 32:
			epn_rxtx = 2 << 12;
			break;
		case 64:
			epn_rxtx = 3 << 12;
			break;
		default:
			BUG();
		}
		if (dbuf && addr)
			epn_rxtx |= UDC_EPN_RX_DB;
		timer_setup(&ep->timer, pio_out_timer, 0);
	}
	if (addr)
		epn_rxtx |= UDC_EPN_RX_VALID;
	BUG_ON(buf & 0x07);
	epn_rxtx |= buf >> 3;

	DBG("%s addr %02x rxtx %04x maxp %d%s buf %d\n",
		name, addr, epn_rxtx, maxp, dbuf ? "x2" : "", buf);

	if (addr & USB_DIR_IN)
		omap_writew(epn_rxtx, UDC_EP_TX(addr & 0xf));
	else
		omap_writew(epn_rxtx, UDC_EP_RX(addr));

	/* next endpoint's buffer starts after this one's */
	buf += maxp;
	if (dbuf)
		buf += maxp;
	BUG_ON(buf > 2048);

	/* set up driver data structures */
	BUG_ON(strlen(name) >= sizeof ep->name);
	strlcpy(ep->name, name, sizeof ep->name);
	INIT_LIST_HEAD(&ep->queue);
	INIT_LIST_HEAD(&ep->iso);
	ep->bEndpointAddress = addr;
	ep->bmAttributes = type;
	ep->double_buf = dbuf;
	ep->udc = udc;

	switch (type) {
	case USB_ENDPOINT_XFER_CONTROL:
		ep->ep.caps.type_control = true;
		ep->ep.caps.dir_in = true;
		ep->ep.caps.dir_out = true;
		break;
	case USB_ENDPOINT_XFER_ISOC:
		ep->ep.caps.type_iso = true;
		break;
	case USB_ENDPOINT_XFER_BULK:
		ep->ep.caps.type_bulk = true;
		break;
	case USB_ENDPOINT_XFER_INT:
		ep->ep.caps.type_int = true;
		break;
	};

	if (addr & USB_DIR_IN)
		ep->ep.caps.dir_in = true;
	else
		ep->ep.caps.dir_out = true;

	ep->ep.name = ep->name;
	ep->ep.ops = &omap_ep_ops;
	ep->maxpacket = maxp;
	usb_ep_set_maxpacket_limit(&ep->ep, ep->maxpacket);
	list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);

	return buf;
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 443 76.38% 3 37.50%
Robert Baldyga 120 20.69% 2 25.00%
Tony Lindgren 12 2.07% 1 12.50%
Kees Cook 5 0.86% 2 25.00%
Total 580 100.00% 8 100.00%



static void omap_udc_release(struct device *dev)
{
	complete(udc->done);
	kfree(udc);
	udc = NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 27 100.00% 2 100.00%
Total 27 100.00% 2 100.00%


static int

omap_udc_setup(struct platform_device *odev, struct usb_phy *xceiv)
{
	unsigned	tmp, buf;

	/* abolish any previous hardware state */
	omap_writew(0, UDC_SYSCON1);
	omap_writew(0, UDC_IRQ_EN);
	omap_writew(UDC_IRQ_SRC_MASK, UDC_IRQ_SRC);
	omap_writew(0, UDC_DMA_IRQ_EN);
	omap_writew(0, UDC_RXDMA_CFG);
	omap_writew(0, UDC_TXDMA_CFG);

	/* UDC_PULLUP_EN gates the chip clock */
	/* OTG_SYSCON_1 |= DEV_IDLE_EN; */

	udc = kzalloc(sizeof(*udc), GFP_KERNEL);
	if (!udc)
		return -ENOMEM;

	spin_lock_init(&udc->lock);

	udc->gadget.ops = &omap_gadget_ops;
	udc->gadget.ep0 = &udc->ep[0].ep;
	INIT_LIST_HEAD(&udc->gadget.ep_list);
	INIT_LIST_HEAD(&udc->iso);
	udc->gadget.speed = USB_SPEED_UNKNOWN;
	udc->gadget.max_speed = USB_SPEED_FULL;
	udc->gadget.name = driver_name;
	udc->transceiver = xceiv;

	/* ep0 is special; put it right after the SETUP buffer */
	buf = omap_ep_setup("ep0", 0, USB_ENDPOINT_XFER_CONTROL,
			8 /* after SETUP */, 64 /* maxpacket */, 0);
	list_del_init(&udc->ep[0].ep.ep_list);

	/* initially disable all non-ep0 endpoints */
	for (tmp = 1; tmp < 15; tmp++) {
		omap_writew(0, UDC_EP_RX(tmp));
		omap_writew(0, UDC_EP_TX(tmp));
	}


#define OMAP_BULK_EP(name, addr) \
	buf = omap_ep_setup(name "-bulk", addr, \
                        USB_ENDPOINT_XFER_BULK, buf, 64, 1);

#define OMAP_INT_EP(name, addr, maxp) \
	buf = omap_ep_setup(name "-int", addr, \
                        USB_ENDPOINT_XFER_INT, buf, maxp, 0);

#define OMAP_ISO_EP(name, addr, maxp) \
	buf = omap_ep_setup(name "-iso", addr, \
                        USB_ENDPOINT_XFER_ISOC, buf, maxp, 1);

	switch (fifo_mode) {
	case 0:
		OMAP_BULK_EP("ep1in",  USB_DIR_IN  | 1);
		OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
		OMAP_INT_EP("ep3in",   USB_DIR_IN  | 3, 16);
		break;
	case 1:
		OMAP_BULK_EP("ep1in",  USB_DIR_IN  | 1);
		OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
		OMAP_INT_EP("ep9in",   USB_DIR_IN  | 9, 16);

		OMAP_BULK_EP("ep3in",  USB_DIR_IN  | 3);
		OMAP_BULK_EP("ep4out", USB_DIR_OUT | 4);
		OMAP_INT_EP("ep10in",  USB_DIR_IN  | 10, 16);

		OMAP_BULK_EP("ep5in",  USB_DIR_IN  | 5);
		OMAP_BULK_EP("ep5out", USB_DIR_OUT | 5);
		OMAP_INT_EP("ep11in",  USB_DIR_IN  | 11, 16);

		OMAP_BULK_EP("ep6in",  USB_DIR_IN  | 6);
		OMAP_BULK_EP("ep6out", USB_DIR_OUT | 6);
		OMAP_INT_EP("ep12in",  USB_DIR_IN  | 12, 16);

		OMAP_BULK_EP("ep7in",  USB_DIR_IN  | 7);
		OMAP_BULK_EP("ep7out", USB_DIR_OUT | 7);
		OMAP_INT_EP("ep13in",  USB_DIR_IN  | 13, 16);
		OMAP_INT_EP("ep13out", USB_DIR_OUT | 13, 16);

		OMAP_BULK_EP("ep8in",  USB_DIR_IN  | 8);
		OMAP_BULK_EP("ep8out", USB_DIR_OUT | 8);
		OMAP_INT_EP("ep14in",  USB_DIR_IN  | 14, 16);
		OMAP_INT_EP("ep14out", USB_DIR_OUT | 14, 16);

		OMAP_BULK_EP("ep15in",  USB_DIR_IN  | 15);
		OMAP_BULK_EP("ep15out", USB_DIR_OUT | 15);

		break;

#ifdef	USE_ISO
	case 2:			/* mixed iso/bulk */
		OMAP_ISO_EP("ep1in",   USB_DIR_IN  | 1, 256);
		OMAP_ISO_EP("ep2out",  USB_DIR_OUT | 2, 256);
		OMAP_ISO_EP("ep3in",   USB_DIR_IN  | 3, 128);
		OMAP_ISO_EP("ep4out",  USB_DIR_OUT | 4, 128);

		OMAP_INT_EP("ep5in",   USB_DIR_IN  | 5, 16);

		OMAP_BULK_EP("ep6in",  USB_DIR_IN  | 6);
		OMAP_BULK_EP("ep7out", USB_DIR_OUT | 7);
		OMAP_INT_EP("ep8in",   USB_DIR_IN  | 8, 16);
		break;
	case 3:			/* mixed bulk/iso */
		OMAP_BULK_EP("ep1in",  USB_DIR_IN  | 1);
		OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
		OMAP_INT_EP("ep3in",   USB_DIR_IN  | 3, 16);

		OMAP_BULK_EP("ep4in",  USB_DIR_IN  | 4);
		OMAP_BULK_EP("ep5out", USB_DIR_OUT | 5);
		OMAP_INT_EP("ep6in",   USB_DIR_IN  | 6, 16);

		OMAP_ISO_EP("ep7in",   USB_DIR_IN  | 7, 256);
		OMAP_ISO_EP("ep8out",  USB_DIR_OUT | 8, 256);
		OMAP_INT_EP("ep9in",   USB_DIR_IN  | 9, 16);
		break;
#endif

	/* add more modes as needed */

	default:
		ERR("unsupported fifo_mode #%d\n", fifo_mode);
		return -ENODEV;
	}
	omap_writew(UDC_CFG_LOCK|UDC_SELF_PWR, UDC_SYSCON1);
	INFO("fifo mode %d, %d bytes not used\n", fifo_mode, 2048 - buf);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 695 91.81% 2 25.00%
Tony Lindgren 47 6.21% 1 12.50%
Michal Nazarewicz 8 1.06% 1 12.50%
Eric Sesterhenn / Snakebyte 4 0.53% 1 12.50%
Heikki Krogerus 1 0.13% 1 12.50%
Felipe Balbi 1 0.13% 1 12.50%
Christoph Lameter 1 0.13% 1 12.50%
Total 757 100.00% 8 100.00%



static int omap_udc_probe(struct platform_device *pdev)
{
	int			status = -ENODEV;
	int			hmc;
	struct usb_phy		*xceiv = NULL;
	const char		*type = NULL;
	struct omap_usb_config	*config = dev_get_platdata(&pdev->dev);
	struct clk		*dc_clk = NULL;
	struct clk		*hhc_clk = NULL;

	if (cpu_is_omap7xx())
		use_dma = 0;

	/* NOTE:  "knows" the order of the resources! */
	if (!request_mem_region(pdev->resource[0].start,
			pdev->resource[0].end - pdev->resource[0].start + 1,
			driver_name)) {
		DBG("request_mem_region failed\n");
		return -EBUSY;
	}

	if (cpu_is_omap16xx()) {
		dc_clk = clk_get(&pdev->dev, "usb_dc_ck");
		hhc_clk = clk_get(&pdev->dev, "usb_hhc_ck");
		BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
		/* can't use omap_udc_enable_clock yet */
		clk_enable(dc_clk);
		clk_enable(hhc_clk);
		udelay(100);
	}

	if (cpu_is_omap7xx()) {
		dc_clk = clk_get(&pdev->dev, "usb_dc_ck");
		hhc_clk = clk_get(&pdev->dev, "l3_ocpi_ck");
		BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
		/* can't use omap_udc_enable_clock yet */
		clk_enable(dc_clk);
		clk_enable(hhc_clk);
		udelay(100);
	}

	INFO("OMAP UDC rev %d.%d%s\n",
		omap_readw(UDC_REV) >> 4, omap_readw(UDC_REV) & 0xf,
		config->otg ? ", Mini-AB" : "");

	/* use the mode given to us by board init code */
	if (cpu_is_omap15xx()) {
		hmc = HMC_1510;
		type = "(unknown)";

		if (machine_without_vbus_sense()) {
			/* just set up software VBUS detect, and then
                         * later rig it so we always report VBUS.
                         * FIXME without really sensing VBUS, we can't
                         * know when to turn PULLUP_EN on/off; and that
                         * means we always "need" the 48MHz clock.
                         */
			u32 tmp = omap_readl(FUNC_MUX_CTRL_0);
			tmp &= ~VBUS_CTRL_1510;
			omap_writel(tmp, FUNC_MUX_CTRL_0);
			tmp |= VBUS_MODE_1510;
			tmp &= ~VBUS_CTRL_1510;
			omap_writel(tmp, FUNC_MUX_CTRL_0);
		}
	} else {
		/* The transceiver may package some GPIO logic or handle
                 * loopback and/or transceiverless setup; if we find one,
                 * use it.  Except for OTG, we don't _need_ to talk to one;
                 * but not having one probably means no VBUS detection.
                 */
		xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
		if (!IS_ERR_OR_NULL(xceiv))
			type = xceiv->label;
		else if (config->otg) {
			DBG("OTG requires external transceiver!\n");
			goto cleanup0;
		}

		hmc = HMC_1610;

		switch (hmc) {
		case 0:			/* POWERUP DEFAULT == 0 */
		case 4:
		case 12:
		case 20:
			if (!cpu_is_omap1710()) {
				type = "integrated";
				break;
			}
			/* FALL THROUGH */
		case 3:
		case 11:
		case 16:
		case 19:
		case 25:
			if (IS_ERR_OR_NULL(xceiv)) {
				DBG("external transceiver not registered!\n");
				type = "unknown";
			}
			break;
		case 21:			/* internal loopback */
			type = "loopback";
			break;
		case 14:			/* transceiverless */
			if (cpu_is_omap1710())
				goto bad_on_1710;
			/* FALL THROUGH */
		case 13:
		case 15:
			type = "no";
			break;

		default:
bad_on_1710:
			ERR("unrecognized UDC HMC mode %d\n", hmc);
			goto cleanup0;
		}
	}

	INFO("hmc mode %d, %s transceiver\n", hmc, type);

	/* a "gadget" abstracts/virtualizes the controller */
	status = omap_udc_setup(pdev, xceiv);
	if (status)
		goto cleanup0;

	xceiv = NULL;
	/* "udc" is now valid */
	pullup_disable(udc);
#if	IS_ENABLED(CONFIG_USB_OHCI_HCD)
	udc->gadget.is_otg = (config->otg != 0);
#endif

	/* starting with omap1710 es2.0, clear toggle is a separate bit */
	if (omap_readw(UDC_REV) >= 0x61)
		udc->clr_halt = UDC_RESET_EP | UDC_CLRDATA_TOGGLE;
	else
		udc->clr_halt = UDC_RESET_EP;

	/* USB general purpose IRQ:  ep0, state changes, dma, etc */
	status = request_irq(pdev->resource[1].start, omap_udc_irq,
			0, driver_name, udc);
	if (status != 0) {
		ERR("can't get irq %d, err %d\n",
			(int) pdev->resource[1].start, status);
		goto cleanup1;
	}

	/* USB "non-iso" IRQ (PIO for all but ep0) */
	status = request_irq(pdev->resource[2].start, omap_udc_pio_irq,
			0, "omap_udc pio", udc);
	if (status != 0) {
		ERR("can't get irq %d, err %d\n",
			(int) pdev->resource[2].start, status);
		goto cleanup2;
	}
#ifdef	USE_ISO
	status = request_irq(pdev->resource[3].start, omap_udc_iso_irq,
			0, "omap_udc iso", udc);
	if (status != 0) {
		ERR("can't get irq %d, err %d\n",
			(int) pdev->resource[3].start, status);
		goto cleanup3;
	}
#endif
	if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
		udc->dc_clk = dc_clk;
		udc->hhc_clk = hhc_clk;
		clk_disable(hhc_clk);
		clk_disable(dc_clk);
	}

	create_proc_file();
	status = usb_add_gadget_udc_release(&pdev->dev, &udc->gadget,
			omap_udc_release);
	if (status)
		goto cleanup4;

	return 0;

cleanup4:
	remove_proc_file();

#ifdef	USE_ISO
cleanup3:
	free_irq(pdev->resource[2].start, udc);
#endif

cleanup2:
	free_irq(pdev->resource[1].start, udc);

cleanup1:
	kfree(udc);
	udc = NULL;

cleanup0:
	if (!IS_ERR_OR_NULL(xceiv))
		usb_put_phy(xceiv);

	if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
		clk_disable(hhc_clk);
		clk_disable(dc_clk);
		clk_put(hhc_clk);
		clk_put(dc_clk);
	}

	release_mem_region(pdev->resource[0].start,
			pdev->resource[0].end - pdev->resource[0].start + 1);

	return status;
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 750 80.99% 7 30.43%
Cory Maccarrone 63 6.80% 1 4.35%
Tony Lindgren 33 3.56% 2 8.70%
Russell King 19 2.05% 1 4.35%
Felipe Balbi 19 2.05% 4 17.39%
Sebastian Andrzej Siewior 19 2.05% 1 4.35%
Kishon Vijay Abraham I 16 1.73% 3 13.04%
Jingoo Han 4 0.43% 1 4.35%
Yong Zhang 1 0.11% 1 4.35%
Heikki Krogerus 1 0.11% 1 4.35%
Javier Martinez Canillas 1 0.11% 1 4.35%
Total 926 100.00% 23 100.00%



static int omap_udc_remove(struct platform_device *pdev)
{
	DECLARE_COMPLETION_ONSTACK(done);

	if (!udc)
		return -ENODEV;

	usb_del_gadget_udc(&udc->gadget);
	if (udc->driver)
		return -EBUSY;

	udc->done = &done;

	pullup_disable(udc);
	if (!IS_ERR_OR_NULL(udc->transceiver)) {
		usb_put_phy(udc->transceiver);
		udc->transceiver = NULL;
	}
	omap_writew(0, UDC_SYSCON1);

	remove_proc_file();

#ifdef	USE_ISO
	free_irq(pdev->resource[3].start, udc);
#endif
	free_irq(pdev->resource[2].start, udc);
	free_irq(pdev->resource[1].start, udc);

	if (udc->dc_clk) {
		if (udc->clk_requested)
			omap_udc_enable_clock(0);
		clk_put(udc->hhc_clk);
		clk_put(udc->dc_clk);
	}

	release_mem_region(pdev->resource[0].start,
			pdev->resource[0].end - pdev->resource[0].start + 1);

	wait_for_completion(&done);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 184 87.20% 4 40.00%
Russell King 8 3.79% 1 10.00%
Sebastian Andrzej Siewior 8 3.79% 1 10.00%
Kishon Vijay Abraham I 5 2.37% 2 20.00%
Tony Lindgren 5 2.37% 1 10.00%
Peter Zijlstra 1 0.47% 1 10.00%
Total 211 100.00% 10 100.00%

/* suspend/resume/wakeup from sysfs (echo > power/state) or when the
 * system is forced into deep sleep
 *
 * REVISIT we should probably reject suspend requests when there's a host
 * session active, rather than disconnecting, at least on boards that can
 * report VBUS irqs (UDC_DEVSTAT.UDC_ATT).  And in any case, we need to
 * make host resumes and VBUS detection trigger OMAP wakeup events; that
 * may involve talking to an external transceiver (e.g. isp1301).
 */



static int omap_udc_suspend(struct platform_device *dev, pm_message_t message)
{
	u32	devstat;

	devstat = omap_readw(UDC_DEVSTAT);

	/* we're requesting 48 MHz clock if the pullup is enabled
         * (== we're attached to the host) and we're not suspended,
         * which would prevent entry to deep sleep...
         */
	if ((devstat & UDC_ATT) != 0 && (devstat & UDC_SUS) == 0) {
		WARNING("session active; suspend requires disconnect\n");
		omap_pullup(&udc->gadget, 0);
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 56 88.89% 2 33.33%
Tony Lindgren 4 6.35% 1 16.67%
Russell King 1 1.59% 1 16.67%
Arjan van de Ven 1 1.59% 1 16.67%
Pavel Machek 1 1.59% 1 16.67%
Total 63 100.00% 6 100.00%



static int omap_udc_resume(struct platform_device *dev)
{
	DBG("resume + wakeup/SRP\n");
	omap_pullup(&udc->gadget, 1);

	/* maybe the host would enumerate us if we nudged it */
	msleep(100);
	return omap_wakeup(&udc->gadget);
}

Contributors
Person Tokens Prop Commits CommitProp
David Brownell 40 97.56% 1 50.00%
Russell King 1 2.44% 1 50.00%
Total 41 100.00% 2 100.00%

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


static struct platform_driver udc_driver = {
	.probe		= omap_udc_probe,
	.remove		= omap_udc_remove,
	.suspend	= omap_udc_suspend,
	.resume		= omap_udc_resume,
	.driver		= {
		.name	= (char *) driver_name,
        },
};

module_platform_driver(udc_driver);

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:omap_udc");
Overall Contributors
Person Tokens Prop Commits CommitProp
David Brownell 12776 87.98% 17 21.52%
Tony Lindgren 1103 7.60% 6 7.59%
Robert Baldyga 120 0.83% 2 2.53%
Felipe Balbi 84 0.58% 9 11.39%
Cory Maccarrone 66 0.45% 1 1.27%
Kishon Vijay Abraham I 54 0.37% 3 3.80%
Sebastian Andrzej Siewior 50 0.34% 2 2.53%
Russell King 45 0.31% 2 2.53%
Kyungmin Park 39 0.27% 1 1.27%
Juha Yrjölä 28 0.19% 1 1.27%
Ido Shayevitz 22 0.15% 2 2.53%
Arnd Bergmann 18 0.12% 1 1.27%
Kees Cook 17 0.12% 2 2.53%
Heikki Krogerus 11 0.08% 3 3.80%
Peter Chen 10 0.07% 1 1.27%
Harvey Harrison 8 0.06% 1 1.27%
Eric Sesterhenn / Snakebyte 8 0.06% 1 1.27%
Michal Nazarewicz 8 0.06% 1 1.27%
Denis V. Lunev 8 0.06% 1 1.27%
Kay Sievers 5 0.03% 1 1.27%
Paul Walmsley 4 0.03% 1 1.27%
Dmitry Baryshkov 4 0.03% 1 1.27%
Jingoo Han 4 0.03% 1 1.27%
Lokesh Vutla 4 0.03% 1 1.27%
Arjan van de Ven 3 0.02% 1 1.27%
Linus Torvalds 3 0.02% 1 1.27%
Kuninori Morimoto 3 0.02% 1 1.27%
Uwe Kleine-König 2 0.01% 1 1.27%
Greg Kroah-Hartman 2 0.01% 2 2.53%
Al Viro 2 0.01% 1 1.27%
Pavel Machek 1 0.01% 1 1.27%
Peter Zijlstra 1 0.01% 1 1.27%
Yong Zhang 1 0.01% 1 1.27%
Bhumika Goyal 1 0.01% 1 1.27%
Rusty Russell 1 0.01% 1 1.27%
Christoph Lameter 1 0.01% 1 1.27%
Javier Martinez Canillas 1 0.01% 1 1.27%
Luiz Fernando N. Capitulino 1 0.01% 1 1.27%
Joe Perches 1 0.01% 1 1.27%
Michal Sojka 1 0.01% 1 1.27%
David Howells 0.00% 0 0.00%
Total 14521 100.00% 79 100.00%
Directory: drivers/usb/gadget/udc

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
David Brownell	40	88.89%	1	50.00%
Tony Lindgren	5	11.11%	1	50.00%
Total	45	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.17 drivers/usb/gadget/udc/omap_udc.c

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