[net-next-2.6.git] / net / caif / cfveil.c

/*
 * Copyright (C) ST-Ericsson AB 2010
 * Author:	Sjur Brendeland/sjur.brandeland@stericsson.com
 * License terms: GNU General Public License (GPL) version 2
 */

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

#include <linux/stddef.h>
#include <linux/slab.h>
#include <net/caif/caif_layer.h>
#include <net/caif/cfsrvl.h>
#include <net/caif/cfpkt.h>

#define VEI_PAYLOAD  0x00
#define VEI_CMD_BIT  0x80
#define VEI_FLOW_OFF 0x81
#define VEI_FLOW_ON  0x80
#define VEI_SET_PIN  0x82
#define VEI_CTRL_PKT_SIZE 1
#define container_obj(layr) container_of(layr, struct cfsrvl, layer)

static int cfvei_receive(struct cflayer *layr, struct cfpkt *pkt);
static int cfvei_transmit(struct cflayer *layr, struct cfpkt *pkt);

struct cflayer *cfvei_create(u8 channel_id, struct dev_info *dev_info)
{
	struct cfsrvl *vei = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
	if (!vei) {
		pr_warn("Out of memory\n");
		return NULL;
	}
	caif_assert(offsetof(struct cfsrvl, layer) == 0);
	memset(vei, 0, sizeof(struct cfsrvl));
	cfsrvl_init(vei, channel_id, dev_info, true);
	vei->layer.receive = cfvei_receive;
	vei->layer.transmit = cfvei_transmit;
	snprintf(vei->layer.name, CAIF_LAYER_NAME_SZ - 1, "vei%d", channel_id);
	return &vei->layer;
}

static int cfvei_receive(struct cflayer *layr, struct cfpkt *pkt)
{
	u8 cmd;
	int ret;
	caif_assert(layr->up != NULL);
	caif_assert(layr->receive != NULL);
	caif_assert(layr->ctrlcmd != NULL);


	if (cfpkt_extr_head(pkt, &cmd, 1) < 0) {
		pr_err("Packet is erroneous!\n");
		cfpkt_destroy(pkt);
		return -EPROTO;
	}
	switch (cmd) {
	case VEI_PAYLOAD:
		ret = layr->up->receive(layr->up, pkt);
		return ret;
	case VEI_FLOW_OFF:
		layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_OFF_IND, 0);
		cfpkt_destroy(pkt);
		return 0;
	case VEI_FLOW_ON:
		layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_ON_IND, 0);
		cfpkt_destroy(pkt);
		return 0;
	case VEI_SET_PIN:	/* SET RS232 PIN */
		cfpkt_destroy(pkt);
		return 0;
	default:		/* SET RS232 PIN */
		pr_warn("Unknown VEI control packet %d (0x%x)!\n", cmd, cmd);
		cfpkt_destroy(pkt);
		return -EPROTO;
	}
}

static int cfvei_transmit(struct cflayer *layr, struct cfpkt *pkt)
{
	u8 tmp = 0;
	struct caif_payload_info *info;
	int ret;
	struct cfsrvl *service = container_obj(layr);
	if (!cfsrvl_ready(service, &ret))
		return ret;
	caif_assert(layr->dn != NULL);
	caif_assert(layr->dn->transmit != NULL);

	if (cfpkt_add_head(pkt, &tmp, 1) < 0) {
		pr_err("Packet is erroneous!\n");
		return -EPROTO;
	}

	/* Add info-> for MUX-layer to route the packet out. */
	info = cfpkt_info(pkt);
	info->channel_id = service->layer.id;
	info->hdr_len = 1;
	info->dev_info = &service->dev_info;
	ret = layr->dn->transmit(layr->dn, pkt);
	if (ret < 0)
		cfpkt_extr_head(pkt, &tmp, 1);
	return ret;
}
Commit	Line	Data
b482cd20 SB	1	/*
	2	* Copyright (C) ST-Ericsson AB 2010
	3	* Author: Sjur Brendeland/sjur.brandeland@stericsson.com
	4	* License terms: GNU General Public License (GPL) version 2
	5	*/
	6
b31fa5ba JP	7	#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
b31fa5ba JP	8
b482cd20 SB	9	#include <linux/stddef.h>
	10	#include <linux/slab.h>
	11	#include <net/caif/caif_layer.h>
	12	#include <net/caif/cfsrvl.h>
	13	#include <net/caif/cfpkt.h>
	14
	15	#define VEI_PAYLOAD 0x00
	16	#define VEI_CMD_BIT 0x80
	17	#define VEI_FLOW_OFF 0x81
	18	#define VEI_FLOW_ON 0x80
	19	#define VEI_SET_PIN 0x82
	20	#define VEI_CTRL_PKT_SIZE 1
	21	#define container_obj(layr) container_of(layr, struct cfsrvl, layer)
	22
	23	static int cfvei_receive(struct cflayer layr, struct cfpkt pkt);
	24	static int cfvei_transmit(struct cflayer layr, struct cfpkt pkt);
	25
	26	struct cflayer cfvei_create(u8 channel_id, struct dev_info dev_info)
	27	{
	28	struct cfsrvl *vei = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
	29	if (!vei) {
b31fa5ba	30	pr_warn("Out of memory\n");
b482cd20 SB	31	return NULL;
	32	}
	33	caif_assert(offsetof(struct cfsrvl, layer) == 0);
	34	memset(vei, 0, sizeof(struct cfsrvl));
b1c74247	35	cfsrvl_init(vei, channel_id, dev_info, true);
b482cd20 SB	36	vei->layer.receive = cfvei_receive;
	37	vei->layer.transmit = cfvei_transmit;
	38	snprintf(vei->layer.name, CAIF_LAYER_NAME_SZ - 1, "vei%d", channel_id);
	39	return &vei->layer;
	40	}
	41
	42	static int cfvei_receive(struct cflayer layr, struct cfpkt pkt)
	43	{
	44	u8 cmd;
	45	int ret;
	46	caif_assert(layr->up != NULL);
	47	caif_assert(layr->receive != NULL);
	48	caif_assert(layr->ctrlcmd != NULL);
	49
	50
	51	if (cfpkt_extr_head(pkt, &cmd, 1) < 0) {
b31fa5ba	52	pr_err("Packet is erroneous!\n");
b482cd20 SB	53	cfpkt_destroy(pkt);
	54	return -EPROTO;
	55	}
	56	switch (cmd) {
	57	case VEI_PAYLOAD:
	58	ret = layr->up->receive(layr->up, pkt);
	59	return ret;
	60	case VEI_FLOW_OFF:
	61	layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_OFF_IND, 0);
	62	cfpkt_destroy(pkt);
	63	return 0;
	64	case VEI_FLOW_ON:
	65	layr->ctrlcmd(layr, CAIF_CTRLCMD_FLOW_ON_IND, 0);
	66	cfpkt_destroy(pkt);
	67	return 0;
	68	case VEI_SET_PIN: /* SET RS232 PIN */
	69	cfpkt_destroy(pkt);
	70	return 0;
	71	default: /* SET RS232 PIN */
b31fa5ba	72	pr_warn("Unknown VEI control packet %d (0x%x)!\n", cmd, cmd);
b482cd20 SB	73	cfpkt_destroy(pkt);
	74	return -EPROTO;
	75	}
	76	}
	77
	78	static int cfvei_transmit(struct cflayer layr, struct cfpkt pkt)
	79	{
	80	u8 tmp = 0;
	81	struct caif_payload_info *info;
	82	int ret;
	83	struct cfsrvl *service = container_obj(layr);
	84	if (!cfsrvl_ready(service, &ret))
	85	return ret;
	86	caif_assert(layr->dn != NULL);
	87	caif_assert(layr->dn->transmit != NULL);
b482cd20 SB	88
b482cd20 SB	89	if (cfpkt_add_head(pkt, &tmp, 1) < 0) {
b31fa5ba	90	pr_err("Packet is erroneous!\n");
b482cd20 SB	91	return -EPROTO;
	92	}
	93
	94	/* Add info-> for MUX-layer to route the packet out. */
	95	info = cfpkt_info(pkt);
	96	info->channel_id = service->layer.id;
	97	info->hdr_len = 1;
	98	info->dev_info = &service->dev_info;
	99	ret = layr->dn->transmit(layr->dn, pkt);
	100	if (ret < 0)
	101	cfpkt_extr_head(pkt, &tmp, 1);
	102	return ret;
	103	}