/*
 * simple-card-utils.c
 *
 * Copyright (c) 2016 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 <linux/clk.h>
#include <linux/module.h>
#include <linux/of.h>
#include <sound/simple_card_utils.h>

int asoc_simple_card_parse_daifmt(struct device *dev,
				  struct device_node *node,
				  struct device_node *codec,
				  char *prefix,
				  unsigned int *retfmt)
{
	struct device_node *bitclkmaster = NULL;
	struct device_node *framemaster = NULL;
	int prefix_len = prefix ? strlen(prefix) : 0;
	unsigned int daifmt;

	daifmt = snd_soc_of_parse_daifmt(node, prefix,
					 &bitclkmaster, &framemaster);
	daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;

	if (prefix_len && !bitclkmaster && !framemaster) {
		/*
		 * No dai-link level and master setting was not found from
		 * sound node level, revert back to legacy DT parsing and
		 * take the settings from codec node.
		 */
		dev_dbg(dev, "Revert to legacy daifmt parsing\n");

		daifmt = snd_soc_of_parse_daifmt(codec, NULL, NULL, NULL) |
			(daifmt & ~SND_SOC_DAIFMT_CLOCK_MASK);
	} else {
		if (codec == bitclkmaster)
			daifmt |= (codec == framemaster) ?
				SND_SOC_DAIFMT_CBM_CFM : SND_SOC_DAIFMT_CBM_CFS;
		else
			daifmt |= (codec == framemaster) ?
				SND_SOC_DAIFMT_CBS_CFM : SND_SOC_DAIFMT_CBS_CFS;
	}

	of_node_put(bitclkmaster);
	of_node_put(framemaster);

	*retfmt = daifmt;

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_card_parse_daifmt);

int asoc_simple_card_set_dailink_name(struct device *dev,
				      struct snd_soc_dai_link *dai_link,
				      const char *fmt, ...)
{
	va_list ap;
	char *name = NULL;
	int ret = -ENOMEM;

	va_start(ap, fmt);
	name = devm_kvasprintf(dev, GFP_KERNEL, fmt, ap);
	va_end(ap);

	if (name) {
		ret = 0;

		dai_link->name		= name;
		dai_link->stream_name	= name;
	}

	return ret;
}
EXPORT_SYMBOL_GPL(asoc_simple_card_set_dailink_name);

int asoc_simple_card_parse_card_name(struct snd_soc_card *card,
				     char *prefix)
{
	char prop[128];
	int ret;

	snprintf(prop, sizeof(prop), "%sname", prefix);

	/* Parse the card name from DT */
	ret = snd_soc_of_parse_card_name(card, prop);
	if (ret < 0)
		return ret;

	if (!card->name && card->dai_link)
		card->name = card->dai_link->name;

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_card_parse_card_name);

int asoc_simple_card_parse_clk(struct device_node *node,
			       struct device_node *dai_of_node,
			       struct asoc_simple_dai *simple_dai)
{
	struct clk *clk;
	u32 val;

	/*
	 * Parse dai->sysclk come from "clocks = <&xxx>"
	 * (if system has common clock)
	 *  or "system-clock-frequency = <xxx>"
	 *  or device's module clock.
	 */
	clk = of_clk_get(node, 0);
	if (!IS_ERR(clk)) {
		simple_dai->sysclk = clk_get_rate(clk);
		simple_dai->clk = clk;
	} else if (!of_property_read_u32(node, "system-clock-frequency", &val)) {
		simple_dai->sysclk = val;
	} else {
		clk = of_clk_get(dai_of_node, 0);
		if (!IS_ERR(clk))
			simple_dai->sysclk = clk_get_rate(clk);
	}

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_card_parse_clk);

int asoc_simple_card_parse_dai(struct device_node *node,
				    struct device_node **dai_of_node,
				    const char **dai_name,
				    const char *list_name,
				    const char *cells_name,
				    int *is_single_link)
{
	struct of_phandle_args args;
	int ret;

	if (!node)
		return 0;

	/*
	 * Get node via "sound-dai = <&phandle port>"
	 * it will be used as xxx_of_node on soc_bind_dai_link()
	 */
	ret = of_parse_phandle_with_args(node, list_name, cells_name, 0, &args);
	if (ret)
		return ret;

	/* Get dai->name */
	if (dai_name) {
		ret = snd_soc_of_get_dai_name(node, dai_name);
		if (ret < 0)
			return ret;
	}

	*dai_of_node = args.np;

	if (is_single_link)
		*is_single_link = !args.args_count;

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_card_parse_dai);

int asoc_simple_card_init_dai(struct snd_soc_dai *dai,
			      struct asoc_simple_dai *simple_dai)
{
	int ret;

	if (simple_dai->sysclk) {
		ret = snd_soc_dai_set_sysclk(dai, 0, simple_dai->sysclk, 0);
		if (ret && ret != -ENOTSUPP) {
			dev_err(dai->dev, "simple-card: set_sysclk error\n");
			return ret;
		}
	}

	if (simple_dai->slots) {
		ret = snd_soc_dai_set_tdm_slot(dai,
					       simple_dai->tx_slot_mask,
					       simple_dai->rx_slot_mask,
					       simple_dai->slots,
					       simple_dai->slot_width);
		if (ret && ret != -ENOTSUPP) {
			dev_err(dai->dev, "simple-card: set_tdm_slot error\n");
			return ret;
		}
	}

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_card_init_dai);

int asoc_simple_card_canonicalize_dailink(struct snd_soc_dai_link *dai_link)
{
	/* Assumes platform == cpu */
	if (!dai_link->platform_of_node)
		dai_link->platform_of_node = dai_link->cpu_of_node;

	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_card_canonicalize_dailink);

void asoc_simple_card_canonicalize_cpu(struct snd_soc_dai_link *dai_link,
				       int is_single_links)
{
	/*
	 * In soc_bind_dai_link() will check cpu name after
	 * of_node matching if dai_link has cpu_dai_name.
	 * but, it will never match if name was created by
	 * fmt_single_name() remove cpu_dai_name if cpu_args
	 * was 0. See:
	 *	fmt_single_name()
	 *	fmt_multiple_name()
	 */
	if (is_single_links)
		dai_link->cpu_dai_name = NULL;
}
EXPORT_SYMBOL_GPL(asoc_simple_card_canonicalize_cpu);

int asoc_simple_card_clean_reference(struct snd_soc_card *card)
{
	struct snd_soc_dai_link *dai_link;
	int num_links;

	for (num_links = 0, dai_link = card->dai_link;
	     num_links < card->num_links;
	     num_links++, dai_link++) {
		of_node_put(dai_link->cpu_of_node);
		of_node_put(dai_link->codec_of_node);
	}
	return 0;
}
EXPORT_SYMBOL_GPL(asoc_simple_card_clean_reference);

/* Module information */
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");
MODULE_LICENSE("GPL v2");
RNING: CPU: 1 PID: 6768 at net/core/dev.c:2439 skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2434
lo: caps=(0x000000a2803b7c69, 0x0000000000000000) len=138 data_len=0 gso_size=15883 gso_type=4 ip_summed=0
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 6768 Comm: syz-executor1 Not tainted 4.9.0 #5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801c063ecd8 ffffffff82346bdf ffffffff00000001 1ffff100380c7d2e
 ffffed00380c7d26 0000000041b58ab3 ffffffff84b37e38 ffffffff823468f1
 ffffffff84820740 ffffffff84f289c0 dffffc0000000000 ffff8801c063ee20
Call Trace:
 [&lt;ffffffff82346bdf&gt;] __dump_stack lib/dump_stack.c:15 [inline]
 [&lt;ffffffff82346bdf&gt;] dump_stack+0x2ee/0x3ef lib/dump_stack.c:51
 [&lt;ffffffff81827e34&gt;] panic+0x1fb/0x412 kernel/panic.c:179
 [&lt;ffffffff8141f704&gt;] __warn+0x1c4/0x1e0 kernel/panic.c:542
 [&lt;ffffffff8141f7e5&gt;] warn_slowpath_fmt+0xc5/0x100 kernel/panic.c:565
 [&lt;ffffffff8356cbaf&gt;] skb_warn_bad_offload+0x2af/0x390 net/core/dev.c:2434
 [&lt;ffffffff83585cd2&gt;] __skb_gso_segment+0x482/0x780 net/core/dev.c:2706
 [&lt;ffffffff83586f19&gt;] skb_gso_segment include/linux/netdevice.h:3985 [inline]
 [&lt;ffffffff83586f19&gt;] validate_xmit_skb+0x5c9/0xc20 net/core/dev.c:2969
 [&lt;ffffffff835892bb&gt;] __dev_queue_xmit+0xe6b/0x1e70 net/core/dev.c:3383
 [&lt;ffffffff8358a2d7&gt;] dev_queue_xmit+0x17/0x20 net/core/dev.c:3424
 [&lt;ffffffff83ad161d&gt;] packet_snd net/packet/af_packet.c:2930 [inline]
 [&lt;ffffffff83ad161d&gt;] packet_sendmsg+0x32ed/0x4d30 net/packet/af_packet.c:2955
 [&lt;ffffffff834f0aaa&gt;] sock_sendmsg_nosec net/socket.c:621 [inline]
 [&lt;ffffffff834f0aaa&gt;] sock_sendmsg+0xca/0x110 net/socket.c:631
 [&lt;ffffffff834f329a&gt;] ___sys_sendmsg+0x8fa/0x9f0 net/socket.c:1954
 [&lt;ffffffff834f5e58&gt;] __sys_sendmsg+0x138/0x300 net/socket.c:1988
 [&lt;ffffffff834f604d&gt;] SYSC_sendmsg net/socket.c:1999 [inline]
 [&lt;ffffffff834f604d&gt;] SyS_sendmsg+0x2d/0x50 net/socket.c:1995
 [&lt;ffffffff84371941&gt;] entry_SYSCALL_64_fastpath+0x1f/0xc2

Signed-off-by: Eric Dumazet &lt;edumazet@google.com&gt;
Reported-by: Dmitry Vyukov  &lt;dvyukov@google.com&gt;
Cc: Willem de Bruijn &lt;willemb@google.com&gt;
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=b2504a5dbef3305ef41988ad270b0e8ec289331c'>Diffstat</a> (limited to 'net')</div><table summary='diffstat' class='diffstat'><tr><td class='mode'>-rw-r--r--</td><td class='upd'><a href='/cgit.cgi/linux/net-next.git/diff/net/core/dev.c?id=b2504a5dbef3305ef41988ad270b0e8ec289331c'>net/core/dev.c</a></td><td class='right'>12</td><td class='graph'><table summary='file diffstat' width='12%'><tr><td class='add' style='width: 75.0%;'/><td class='rem' style='width: 25.0%;'/><td class='none' style='width: 0.0%;'/></tr></table></td></tr>
</table><div class='diffstat-summary'>1 files changed, 9 insertions, 3 deletions</div><table summary='diff' class='diff'><tr><td><div class='head'>diff --git a/net/core/dev.c b/net/core/dev.c