/*
 * Renesas R-Car CMD support
 *
 * Copyright (C) 2015 Renesas Solutions Corp.
 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 * 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.
 */
#include "rsnd.h"

struct rsnd_cmd {
	struct rsnd_mod mod;
};

#define CMD_NAME "cmd"

#define rsnd_cmd_nr(priv) ((priv)->cmd_nr)
#define for_each_rsnd_cmd(pos, priv, i)					\
	for ((i) = 0;							\
	     ((i) < rsnd_cmd_nr(priv)) &&				\
		     ((pos) = (struct rsnd_cmd *)(priv)->cmd + i);	\
	     i++)

static int rsnd_cmd_init(struct rsnd_mod *mod,
			 struct rsnd_dai_stream *io,
			 struct rsnd_priv *priv)
{
	struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
	struct rsnd_mod *mix = rsnd_io_to_mod_mix(io);
	struct device *dev = rsnd_priv_to_dev(priv);
	u32 data;

	if (!mix && !dvc)
		return 0;

	if (mix) {
		struct rsnd_dai *rdai;
		struct rsnd_mod *src;
		struct rsnd_dai_stream *tio;
		int i;
		u32 path[] = {
			[0] = 0,
			[1] = 1 << 0,
			[2] = 0,
			[3] = 0,
			[4] = 0,
			[5] = 1 << 8
		};

		/*
		 * it is assuming that integrater is well understanding about
		 * data path. Here doesn't check impossible connection,
		 * like src2 + src5
		 */
		data = 0;
		for_each_rsnd_dai(rdai, priv, i) {
			tio = &rdai->playback;
			src = rsnd_io_to_mod_src(tio);
			if (mix == rsnd_io_to_mod_mix(tio))
				data |= path[rsnd_mod_id(src)];

			tio = &rdai->capture;
			src = rsnd_io_to_mod_src(tio);
			if (mix == rsnd_io_to_mod_mix(tio))
				data |= path[rsnd_mod_id(src)];
		}

	} else {
		struct rsnd_mod *src = rsnd_io_to_mod_src(io);

		u32 path[] = {
			[0] = 0x30000,
			[1] = 0x30001,
			[2] = 0x40000,
			[3] = 0x10000,
			[4] = 0x20000,
			[5] = 0x40100
		};

		data = path[rsnd_mod_id(src)];
	}

	dev_dbg(dev, "ctu/mix path = 0x%08x", data);

	rsnd_mod_write(mod, CMD_ROUTE_SLCT, data);
	rsnd_mod_write(mod, CMD_BUSIF_DALIGN, rsnd_get_dalign(mod, io));

	rsnd_adg_set_cmd_timsel_gen2(mod, io);

	return 0;
}

static int rsnd_cmd_start(struct rsnd_mod *mod,
			  struct rsnd_dai_stream *io,
			  struct rsnd_priv *priv)
{
	rsnd_mod_write(mod, CMD_CTRL, 0x10);

	return 0;
}

static int rsnd_cmd_stop(struct rsnd_mod *mod,
			 struct rsnd_dai_stream *io,
			 struct rsnd_priv *priv)
{
	rsnd_mod_write(mod, CMD_CTRL, 0);

	return 0;
}

static struct rsnd_mod_ops rsnd_cmd_ops = {
	.name	= CMD_NAME,
	.init	= rsnd_cmd_init,
	.start	= rsnd_cmd_start,
	.stop	= rsnd_cmd_stop,
};

int rsnd_cmd_attach(struct rsnd_dai_stream *io, int id)
{
	struct rsnd_priv *priv = rsnd_io_to_priv(io);
	struct rsnd_mod *mod = rsnd_cmd_mod_get(priv, id);

	return rsnd_dai_connect(mod, io, mod->type);
}

struct rsnd_mod *rsnd_cmd_mod_get(struct rsnd_priv *priv, int id)
{
	if (WARN_ON(id < 0 || id >= rsnd_cmd_nr(priv)))
		id = 0;

	return rsnd_mod_get((struct rsnd_cmd *)(priv->cmd) + id);
}

int rsnd_cmd_probe(struct rsnd_priv *priv)
{
	struct device *dev = rsnd_priv_to_dev(priv);
	struct rsnd_cmd *cmd;
	int i, nr, ret;

	/* This driver doesn't support Gen1 at this point */
	if (rsnd_is_gen1(priv))
		return 0;

	/* same number as DVC */
	nr = priv->dvc_nr;
	if (!nr)
		return 0;

	cmd = devm_kzalloc(dev, sizeof(*cmd) * nr, GFP_KERNEL);
	if (!cmd)
		return -ENOMEM;

	priv->cmd_nr	= nr;
	priv->cmd	= cmd;

	for_each_rsnd_cmd(cmd, priv, i) {
		ret = rsnd_mod_init(priv, rsnd_mod_get(cmd),
				    &rsnd_cmd_ops, NULL,
				    rsnd_mod_get_status, RSND_MOD_CMD, i);
		if (ret)
			return ret;
	}

	return 0;
}

void rsnd_cmd_remove(struct rsnd_priv *priv)
{
	struct rsnd_cmd *cmd;
	int i;

	for_each_rsnd_cmd(cmd, priv, i) {
		rsnd_mod_quit(rsnd_mod_get(cmd));
	}
}
'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>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-30 14:28:22 -0800</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-30 14:28:22 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/ohci-sm501.c?id=54791b276b4000b307339f269d3bf7db877d536f'>54791b276b4000b307339f269d3bf7db877d536f</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/host/ohci-sm501.c?id=54791b276b4000b307339f269d3bf7db877d536f'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=54791b276b4000b307339f269d3bf7db877d536f'>1c2616bd373ce5ea28aac2a53e32f5b5834901ce</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/host/ohci-sm501.c?id=54791b276b4000b307339f269d3bf7db877d536f'>drivers/usb/host/ohci-sm501.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/ohci-sm501.c?id=5d0e7705774dd412a465896d08d59a81a345c1e4'>5d0e7705774dd412a465896d08d59a81a345c1e4</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/host/ohci-sm501.c?id=54791b276b4000b307339f269d3bf7db877d536f&amp;id2=5d0e7705774dd412a465896d08d59a81a345c1e4'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/ohci-sm501.c?id=047487241ff59374fded8c477f21453681f5995c'>047487241ff59374fded8c477f21453681f5995c</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/host/ohci-sm501.c?id=54791b276b4000b307339f269d3bf7db877d536f&amp;id2=047487241ff59374fded8c477f21453681f5995c'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'sparc64-non-resumable-user-error-recovery'</div><div class='commit-msg'>Liam R. Howlett says:

====================
sparc64: Recover from userspace non-resumable PIO &amp; MEM errors

A non-resumable error from userspace is able to cause a kernel panic or trap
loop due to the setup and handling of the queued traps once in the kernel.
This patch series addresses both of these issues.

The queues are fixed by simply zeroing the memory before use.

PIO errors from userspace will result in a SIGBUS being sent to the user
process.

The MEM errors form userspace will result in a SIGKILL and also cause the
offending pages to be claimed so they are no longer used in future tasks.
SIGKILL is used to ensure that the process does not try to coredump and result
in an attempt to read the memory again from within kernel space.  Although
there is a HV call to scrub the memory (mem_scrub), there is no easy way to
guarantee that the real memory address(es) are not used by other tasks.
Clearing the error with mem_scrub would zero the memory and cause the other
processes to proceed with bad data.

The handling of other non-resumable errors remain unchanged and will cause a
panic.
====================

Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=54791b276b4000b307339f269d3bf7db877d536f'>Diffstat</a> (limited to 'drivers/usb/host/ohci-sm501.c')</div><table summary='diffstat' class='diffstat'>