/*
 * L3 code
 *
 *  Copyright (C) 2008, Christian Pellegrin <chripell@evolware.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *
 * based on:
 *
 * L3 bus algorithm module.
 *
 *  Copyright (C) 2001 Russell King, All Rights Reserved.
 *
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/gpio.h>

#include <sound/l3.h>

/*
 * Send one byte of data to the chip.  Data is latched into the chip on
 * the rising edge of the clock.
 */
static void sendbyte(struct l3_pins *adap, unsigned int byte)
{
	int i;

	for (i = 0; i < 8; i++) {
		adap->setclk(adap, 0);
		udelay(adap->data_hold);
		adap->setdat(adap, byte & 1);
		udelay(adap->data_setup);
		adap->setclk(adap, 1);
		udelay(adap->clock_high);
		byte >>= 1;
	}
}

/*
 * Send a set of bytes to the chip.  We need to pulse the MODE line
 * between each byte, but never at the start nor at the end of the
 * transfer.
 */
static void sendbytes(struct l3_pins *adap, const u8 *buf,
		      int len)
{
	int i;

	for (i = 0; i < len; i++) {
		if (i) {
			udelay(adap->mode_hold);
			adap->setmode(adap, 0);
			udelay(adap->mode);
		}
		adap->setmode(adap, 1);
		udelay(adap->mode_setup);
		sendbyte(adap, buf[i]);
	}
}

int l3_write(struct l3_pins *adap, u8 addr, u8 *data, int len)
{
	adap->setclk(adap, 1);
	adap->setdat(adap, 1);
	adap->setmode(adap, 1);
	udelay(adap->mode);

	adap->setmode(adap, 0);
	udelay(adap->mode_setup);
	sendbyte(adap, addr);
	udelay(adap->mode_hold);

	sendbytes(adap, data, len);

	adap->setclk(adap, 1);
	adap->setdat(adap, 1);
	adap->setmode(adap, 0);

	return len;
}
EXPORT_SYMBOL_GPL(l3_write);


static void l3_set_clk(struct l3_pins *adap, int val)
{
	gpio_set_value(adap->gpio_clk, val);
}

static void l3_set_data(struct l3_pins *adap, int val)
{
	gpio_set_value(adap->gpio_data, val);
}

static void l3_set_mode(struct l3_pins *adap, int val)
{
	gpio_set_value(adap->gpio_mode, val);
}

int l3_set_gpio_ops(struct device *dev, struct l3_pins *adap)
{
	int ret;

	if (!adap->use_gpios)
		return -EINVAL;

	ret = devm_gpio_request_one(dev, adap->gpio_data,
				GPIOF_OUT_INIT_LOW, "l3_data");
	if (ret < 0)
		return ret;
	adap->setdat = l3_set_data;

	ret = devm_gpio_request_one(dev, adap->gpio_clk,
				GPIOF_OUT_INIT_LOW, "l3_clk");
	if (ret < 0)
		return ret;
	adap->setclk = l3_set_clk;

	ret = devm_gpio_request_one(dev, adap->gpio_mode,
				GPIOF_OUT_INIT_LOW, "l3_mode");
	if (ret < 0)
		return ret;
	adap->setmode = l3_set_mode;

	return 0;
}
EXPORT_SYMBOL_GPL(l3_set_gpio_ops);

MODULE_DESCRIPTION("L3 bit-banging driver");
MODULE_AUTHOR("Christian Pellegrin <chripell@evolware.org>");
MODULE_LICENSE("GPL");
thod='get'><input type='hidden' name='id' value='59331c215daf600a650e281b6e8ef3e1ed1174c2'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-16 11:23:34 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-16 11:23:34 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net?id=59331c215daf600a650e281b6e8ef3e1ed1174c2'>59331c215daf600a650e281b6e8ef3e1ed1174c2</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net?id=59331c215daf600a650e281b6e8ef3e1ed1174c2'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=59331c215daf600a650e281b6e8ef3e1ed1174c2'>f62bf3253fe48d7dd8b09b040c8e7fd9b2c02a86</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net?id=59331c215daf600a650e281b6e8ef3e1ed1174c2'>net</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net?id=ff0f962ca3c38239b299a70e7eea27abfbb979c3'>ff0f962ca3c38239b299a70e7eea27abfbb979c3</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net?id=59331c215daf600a650e281b6e8ef3e1ed1174c2&amp;id2=ff0f962ca3c38239b299a70e7eea27abfbb979c3'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net?id=45ee2c1d66185e5bd27702c60cce3c43fa3370d2'>45ee2c1d66185e5bd27702c60cce3c43fa3370d2</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net?id=59331c215daf600a650e281b6e8ef3e1ed1174c2&amp;id2=45ee2c1d66185e5bd27702c60cce3c43fa3370d2'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'ceph-for-4.10-rc1' of git://github.com/ceph/ceph-client</div><div class='commit-msg'>Pull ceph updates from Ilya Dryomov:
 "A varied set of changes:

   - a large rework of cephx auth code to cope with CONFIG_VMAP_STACK
     (myself). Also fixed a deadlock caused by a bogus allocation on the
     writeback path and authorize reply verification.

   - a fix for long stalls during fsync (Jeff Layton). The client now
     has a way to force the MDS log flush, leading to ~100x speedups in
     some synthetic tests.

   - a new [no]require_active_mds mount option (Zheng Yan).

     On mount, we will now check whether any of the MDSes are available
     and bail rather than block if none are. This check can be avoided
     by specifying the "no" option.

   - a couple of MDS cap handling fixes and a few assorted patches
     throughout"

* tag 'ceph-for-4.10-rc1' of git://github.com/ceph/ceph-client: (32 commits)
  libceph: remove now unused finish_request() wrapper
  libceph: always signal completion when done
  ceph: avoid creating orphan object when checking pool permission
  ceph: properly set issue_seq for cap release
  ceph: add flags parameter to send_cap_msg
  ceph: update cap message struct version to 10
  ceph: define new argument structure for send_cap_msg
  ceph: move xattr initialzation before the encoding past the ceph_mds_caps
  ceph: fix minor typo in unsafe_request_wait
  ceph: record truncate size/seq for snap data writeback
  ceph: check availability of mds cluster on mount
  ceph: fix splice read for no Fc capability case
  ceph: try getting buffer capability for readahead/fadvise
  ceph: fix scheduler warning due to nested blocking
  ceph: fix printing wrong return variable in ceph_direct_read_write()
  crush: include mapper.h in mapper.c
  rbd: silence bogus -Wmaybe-uninitialized warning
  libceph: no need to drop con-&gt;mutex for -&gt;get_authorizer()
  libceph: drop len argument of *verify_authorizer_reply()
  libceph: verify authorize reply on connect
  ...
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=59331c215daf600a650e281b6e8ef3e1ed1174c2'>Diffstat</a> (limited to 'net')</div><table summary='diffstat' class='diffstat'>