/*
 * Copyright (C) ST-Ericsson AB 2010
 * Author:	Sjur Brendeland
 * License terms: GNU General Public License (GPL) version 2
 */

#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <net/caif/caif_layer.h>
#include <net/caif/cfsrvl.h>
#include <net/caif/cfpkt.h>

#define container_obj(layr) ((struct cfsrvl *) layr)
#define UTIL_PAYLOAD  0x00
#define UTIL_CMD_BIT  0x80
#define UTIL_REMOTE_SHUTDOWN 0x82
#define UTIL_FLOW_OFF 0x81
#define UTIL_FLOW_ON  0x80

static int cfutill_receive(struct cflayer *layr, struct cfpkt *pkt);
static int cfutill_transmit(struct cflayer *layr, struct cfpkt *pkt);

struct cflayer *cfutill_create(u8 channel_id, struct dev_info *dev_info)
{
	struct cfsrvl *util = kzalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
	if (!util)
		return NULL;
	caif_assert(offsetof(struct cfsrvl, layer) == 0);
	cfsrvl_init(util, channel_id, dev_info, true);
	util->layer.receive = cfutill_receive;
	util->layer.transmit = cfutill_transmit;
	snprintf(util->layer.name, CAIF_LAYER_NAME_SZ - 1, "util1");
	return &util->layer;
}

static int cfutill_receive(struct cflayer *layr, struct cfpkt *pkt)
{
	u8 cmd = -1;
	struct cfsrvl *service = container_obj(layr);
	caif_assert(layr != NULL);
	caif_assert(layr->up != NULL);
	caif_assert(layr->up->receive != NULL);
	caif_assert(layr->up->ctrlcmd != NULL);
	if (cfpkt_extr_head(pkt, &cmd, 1) < 0) {
		pr_err("Packet is erroneous!\n");
		cfpkt_destroy(pkt);
		return -EPROTO;
	}

	switch (cmd) {
	case UTIL_PAYLOAD:
		return layr->up->receive(layr->up, pkt);
	case UTIL_FLOW_OFF:
		layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_OFF_IND, 0);
		cfpkt_destroy(pkt);
		return 0;
	case UTIL_FLOW_ON:
		layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_ON_IND, 0);
		cfpkt_destroy(pkt);
		return 0;
	case UTIL_REMOTE_SHUTDOWN:	/* Remote Shutdown Request */
		pr_err("REMOTE SHUTDOWN REQUEST RECEIVED\n");
		layr->ctrlcmd(layr, CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND, 0);
		service->open = false;
		cfpkt_destroy(pkt);
		return 0;
	default:
		cfpkt_destroy(pkt);
		pr_warn("Unknown service control %d (0x%x)\n", cmd, cmd);
		return -EPROTO;
	}
}

static int cfutill_transmit(struct cflayer *layr, struct cfpkt *pkt)
{
	u8 zero = 0;
	struct caif_payload_info *info;
	int ret;
	struct cfsrvl *service = container_obj(layr);
	caif_assert(layr != NULL);
	caif_assert(layr->dn != NULL);
	caif_assert(layr->dn->transmit != NULL);

	if (!cfsrvl_ready(service, &ret)) {
		cfpkt_destroy(pkt);
		return ret;
	}

	cfpkt_add_head(pkt, &zero, 1);
	/* Add info for MUX-layer to route the packet out. */
	info = cfpkt_info(pkt);
	info->channel_id = service->layer.id;
	/*
	 * To optimize alignment, we add up the size of CAIF header before
	 * payload.
	 */
	info->hdr_len = 1;
	info->dev_info = &service->dev_info;
	return layr->dn->transmit(layr->dn, pkt);
}
b674eb6ce594b0e9e8940495e95f33'>sound</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='53a20465e6b674eb6ce594b0e9e8940495e95f33'/><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>Mark Brown &lt;broonie@kernel.org&gt;</td><td class='right'>2016-11-15 15:01:09 +0000</td></tr>
<tr><th>committer</th><td>Mark Brown &lt;broonie@kernel.org&gt;</td><td class='right'>2016-11-15 15:22:10 +0000</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/sound?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>53a20465e6b674eb6ce594b0e9e8940495e95f33</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/sound?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>4d4c29c7c68ab2a1b69e4bd3903949356d2467e8</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/sound?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>include/sound</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/sound?id=1001354ca34179f3db924eb66672442a173147dc'>1001354ca34179f3db924eb66672442a173147dc</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/sound?id=53a20465e6b674eb6ce594b0e9e8940495e95f33&amp;id2=1001354ca34179f3db924eb66672442a173147dc'>diff</a>)</td></tr></table>
<div class='commit-subject'>regulator: pwm: Add missing quotes to DT example</div><div class='commit-msg'>Reported-by: Peter Rosin &lt;peda@axentia.se&gt;
Signed-off-by: Mark Brown &lt;broonie@kernel.org&gt;
Acked-by: Rob Herring &lt;robh@kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=53a20465e6b674eb6ce594b0e9e8940495e95f33'>Diffstat</a> (limited to 'include/sound')</div><table summary='diffstat' class='diffstat'>