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ethercat
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EoE frame receiving; regarding open/stop commands.

This commit is contained in:
Florian Pose 2006-04-26 16:43:01 +00:00
parent d6ec03088b
commit 83220ba14f
2 changed files with 89 additions and 21 deletions
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109
master/ethernet.c
View File

@ -28,6 +28,8 @@
/*****************************************************************************/
#include <linux/etherdevice.h>
#include "../include/ecrt.h"
#include "globals.h"
#include "master.h"
@ -55,6 +57,7 @@ int ec_eoedev_open(struct net_device *);
int ec_eoedev_stop(struct net_device *);
int ec_eoedev_tx(struct sk_buff *, struct net_device *);
struct net_device_stats *ec_eoedev_stats(struct net_device *);
void ec_eoedev_rx(struct net_device *, const uint8_t *, size_t);
/*****************************************************************************/
@ -69,6 +72,7 @@ int ec_eoe_init(ec_eoe_t *eoe, ec_slave_t *slave)
eoe->slave = slave;
eoe->rx_state = EC_EOE_IDLE;
eoe->opened = 0;
if (!(eoe->dev =
alloc_netdev(sizeof(ec_eoedev_priv_t), "eoe%d", ec_eoedev_init))) {
@ -120,11 +124,10 @@ void ec_eoe_run(ec_eoe_t *eoe)
uint8_t *data;
ec_master_t *master;
size_t rec_size;
unsigned int i;
uint8_t fragment_number;
uint8_t complete_size;
uint8_t frame_number;
uint8_t last_fragment;
uint8_t fragment_number, frame_number, last_fragment, time_appended;
uint8_t fragment_offset, frame_type;
if (!eoe->opened) return;
master = eoe->slave->master;
@ -163,25 +166,44 @@ void ec_eoe_run(ec_eoe_t *eoe)
return;
}
fragment_number = EC_READ_U16(data + 2) & 0x003F;
complete_size = (EC_READ_U16(data + 2) >> 6) & 0x003F;
frame_number = (EC_READ_U16(data + 2) >> 12) & 0x0003;
last_fragment = (EC_READ_U16(data + 2) >> 15) & 0x0001;
frame_type = EC_READ_U16(data) & 0x000F;
EC_DBG("EOE %s received, fragment: %i, complete size: %i (0x%02X),"
" frame %i%s\n",
fragment_number ? "fragment" : "initiate", fragment_number,
(complete_size - 31) / 32, complete_size, frame_number,
last_fragment ? ", last fragment" : "");
EC_DBG("");
for (i = 0; i < rec_size - 2; i++) {
printk("%02X ", data[i + 2]);
if ((i + 1) % 16 == 0) {
printk("\n");
EC_DBG("");
if (frame_type == 0x00) { // EoE Fragment Request
last_fragment = (EC_READ_U16(data) >> 8) & 0x0001;
time_appended = (EC_READ_U16(data) >> 9) & 0x0001;
fragment_number = EC_READ_U16(data + 2) & 0x003F;
fragment_offset = (EC_READ_U16(data + 2) >> 6) & 0x003F;
frame_number = (EC_READ_U16(data + 2) >> 12) & 0x000F;
#if 0
EC_DBG("EOE fragment req received, fragment: %i, offset: %i,"
" frame %i%s%s, %i bytes\n", fragment_number,
fragment_offset, frame_number,
last_fragment ? ", last fragment" : "",
time_appended ? ", + timestamp" : "",
time_appended ? rec_size - 8 : rec_size - 4);
#if 0
EC_DBG("");
for (i = 0; i < rec_size - 4; i++) {
printk("%02X ", data[i + 4]);
if ((i + 1) % 16 == 0) {
printk("\n");
EC_DBG("");
}
}
printk("\n");
#endif
#endif
ec_eoedev_rx(eoe->dev, data + 4,
time_appended ? rec_size - 8 : rec_size - 4);
}
else {
#if 1
EC_DBG("other frame received.\n");
#endif
}
printk("\n");
eoe->rx_state = EC_EOE_IDLE;
return;
@ -198,6 +220,8 @@ void ec_eoe_print(const ec_eoe_t *eoe)
{
EC_INFO(" EoE slave %i\n", eoe->slave->ring_position);
EC_INFO(" RX State %i\n", eoe->rx_state);
EC_INFO(" Assigned device: %s (%s)\n", eoe->dev->name,
eoe->opened ? "opened" : "closed");
}
/*****************************************************************************/
@ -209,6 +233,7 @@ void ec_eoe_print(const ec_eoe_t *eoe)
void ec_eoedev_init(struct net_device *dev /**< pointer to the net_device */)
{
ec_eoedev_priv_t *priv;
unsigned int i;
// initialize net_device
ether_setup(dev);
@ -217,6 +242,8 @@ void ec_eoedev_init(struct net_device *dev /**< pointer to the net_device */)
dev->hard_start_xmit = ec_eoedev_tx;
dev->get_stats = ec_eoedev_stats;
for (i = 0; i < 6; i++) dev->dev_addr[i] = (i + 1) | (i + 1) << 4;
// initialize private data
priv = netdev_priv(dev);
memset(priv, 0, sizeof(ec_eoedev_priv_t));
@ -231,6 +258,7 @@ void ec_eoedev_init(struct net_device *dev /**< pointer to the net_device */)
int ec_eoedev_open(struct net_device *dev /**< EoE net_device */)
{
ec_eoedev_priv_t *priv = netdev_priv(dev);
priv->eoe->opened = 1;
netif_start_queue(dev);
EC_INFO("%s (slave %i) opened.\n", dev->name,
priv->eoe->slave->ring_position);
@ -247,6 +275,7 @@ int ec_eoedev_stop(struct net_device *dev /**< EoE net_device */)
{
ec_eoedev_priv_t *priv = netdev_priv(dev);
netif_stop_queue(dev);
priv->eoe->opened = 0;
EC_INFO("%s (slave %i) stopped.\n", dev->name,
priv->eoe->slave->ring_position);
return 0;
@ -271,6 +300,44 @@ int ec_eoedev_tx(struct sk_buff *skb, /**< transmit socket buffer */
/*****************************************************************************/
/**
Receives data from the bus and passes it to the network stack.
*/
void ec_eoedev_rx(struct net_device *dev, /**< EoE net_device */
const uint8_t *data, /**< pointer to the data */
size_t size /**< size of the received data */
)
{
ec_eoedev_priv_t *priv = netdev_priv(dev);
struct sk_buff *skb;
// allocate socket buffer
if (!(skb = dev_alloc_skb(size + 2))) {
if (printk_ratelimit())
EC_WARN("EoE RX: low on mem. frame dropped.\n");
priv->stats.rx_dropped++;
return;
}
// copy received data to socket buffer
memcpy(skb_put(skb, size), data, size);
// set socket buffer fields
skb->dev = dev;
skb->protocol = eth_type_trans(skb, dev);
skb->ip_summed = CHECKSUM_UNNECESSARY;
// update statistics
priv->stats.rx_packets++;
priv->stats.rx_bytes += size;
// pass socket buffer to network stack
netif_rx(skb);
}
/*****************************************************************************/
/**
Gets statistics about the virtual network device.
*/

1
master/ethernet.h
View File

@ -64,6 +64,7 @@ typedef struct
ec_slave_t *slave; /**< pointer to the corresponding slave */
ec_eoe_state_t rx_state; /**< state of the state machine */
struct net_device *dev; /**< net_device for virtual ethernet device */
uint8_t opened; /**< net_device is opened */
}
ec_eoe_t;