/*
 * linux/drivers/usb/gadget/s3c2410_udc.h
 * Samsung on-chip full speed USB device controllers
 *
 * Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard
 *	Additional cleanups by Ben Dooks <ben-linux@fluff.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#ifndef _S3C2410_UDC_H
#define _S3C2410_UDC_H

struct s3c2410_ep {
	struct list_head		queue;
	unsigned long			last_io;	/* jiffies timestamp */
	struct usb_gadget		*gadget;
	struct s3c2410_udc		*dev;
	struct usb_ep			ep;
	u8				num;

	unsigned short			fifo_size;
	u8				bEndpointAddress;
	u8				bmAttributes;

	unsigned			halted : 1;
	unsigned			already_seen : 1;
	unsigned			setup_stage : 1;
};


/* Warning : ep0 has a fifo of 16 bytes */
/* Don't try to set 32 or 64            */
/* also testusb 14 fails  wit 16 but is */
/* fine with 8                          */
#define EP0_FIFO_SIZE		 8
#define EP_FIFO_SIZE		64
#define DEFAULT_POWER_STATE	0x00

#define S3C2440_EP_FIFO_SIZE	128

static const char ep0name [] = "ep0";

static const char *const ep_name[] = {
	ep0name,                                /* everyone has ep0 */
	/* s3c2410 four bidirectional bulk endpoints */
	"ep1-bulk", "ep2-bulk", "ep3-bulk", "ep4-bulk",
};

#define S3C2410_ENDPOINTS       ARRAY_SIZE(ep_name)

struct s3c2410_request {
	struct list_head		queue;		/* ep's requests */
	struct usb_request		req;
};

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

static const char *ep0states[]= {
        "EP0_IDLE",
        "EP0_IN_DATA_PHASE",
        "EP0_OUT_DATA_PHASE",
        "EP0_END_XFER",
        "EP0_STALL",
};

struct s3c2410_udc {
	spinlock_t			lock;

	struct s3c2410_ep		ep[S3C2410_ENDPOINTS];
	int				address;
	struct usb_gadget		gadget;
	struct usb_gadget_driver	*driver;
	struct s3c2410_request		fifo_req;
	u8				fifo_buf[EP_FIFO_SIZE];
	u16				devstatus;

	u32				port_status;
	int				ep0state;

	unsigned			got_irq : 1;

	unsigned			req_std : 1;
	unsigned			req_config : 1;
	unsigned			req_pending : 1;
	u8				vbus;
	struct dentry			*regs_info;
};
#define to_s3c2410(g)	(container_of((g), struct s3c2410_udc, gadget))

#endif
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=1fc576b82b96d9bb033ff0098e1c0bf68de282b2'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?h=nds-private-remove&amp;id=1fc576b82b96d9bb033ff0098e1c0bf68de282b2'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc?h=nds-private-remove&amp;id=1fc576b82b96d9bb033ff0098e1c0bf68de282b2'>soc</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/soc-utils.c?h=nds-private-remove&amp;id=1fc576b82b96d9bb033ff0098e1c0bf68de282b2'>soc-utils.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/soc-utils.c?h=nds-private-remove&amp;id=1fc576b82b96d9bb033ff0098e1c0bf68de282b2&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
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<tr><th>author</th><td>Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;</td><td class='right'>2017-02-01 17:45:02 +0000</td></tr>
<tr><th>committer</th><td>Ingo Molnar &lt;mingo@kernel.org&gt;</td><td class='right'>2017-02-01 21:17:49 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/ppc/daca.c?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>c8f325a59cfc718d13a50fbc746ed9b415c25e92</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/ppc/daca.c?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>d53fbdac9d0781e39a13b2ac6b2bd258cf3b4140</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/ppc/daca.c?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>sound/ppc/daca.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/ppc/daca.c?h=nds-private-remove&amp;id=bf29bddf0417a4783da3b24e8c9e017ac649326f'>bf29bddf0417a4783da3b24e8c9e017ac649326f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/ppc/daca.c?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92&amp;id2=bf29bddf0417a4783da3b24e8c9e017ac649326f'>diff</a>)</td></tr></table>
<div class='commit-subject'>efi/fdt: Avoid FDT manipulation after ExitBootServices()</div><div class='commit-msg'>Some AArch64 UEFI implementations disable the MMU in ExitBootServices(),
after which unaligned accesses to RAM are no longer supported.

Commit:

  abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel")

fixed an issue in the memory map handling of the stub FDT code, but
inadvertently created an issue with such firmware, by moving some
of the FDT manipulation to after the invocation of ExitBootServices().

Given that the stub's libfdt implementation uses the ordinary, accelerated
string functions, which rely on hardware handling of unaligned accesses,
manipulating the FDT with the MMU off may result in alignment faults.

So fix the situation by moving the update_fdt_memmap() call into the
callback function invoked by efi_exit_boot_services() right before it
calls the ExitBootServices() UEFI service (which is arguably a better
place for it anyway)

Note that disabling the MMU in ExitBootServices() is not compliant with
the UEFI spec, and carries great risk due to the fact that switching from
cached to uncached memory accesses halfway through compiler generated code
(i.e., involving a stack) can never be done in a way that is architecturally
safe.

Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel")
Signed-off-by: Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;
Tested-by: Riku Voipio &lt;riku.voipio@linaro.org&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Cc: mark.rutland@arm.com
Cc: linux-efi@vger.kernel.org
Cc: matt@codeblueprint.co.uk
Cc: leif.lindholm@linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>Diffstat</a> (limited to 'sound/ppc/daca.c')</div><table summary='diffstat' class='diffstat'>