/******************************************************************************
*
* $Id$
*
* Copyright (C) 2006-2008 Florian Pose, Ingenieurgemeinschaft IgH
*
* This file is part of the IgH EtherCAT Master.
*
* The IgH EtherCAT Master 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.
*
* The IgH EtherCAT Master is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with the IgH EtherCAT Master; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* ---
*
* The license mentioned above concerns the source code only. Using the
* EtherCAT technology and brand is only permitted in compliance with the
* industrial property and similar rights of Beckhoff Automation GmbH.
*
*****************************************************************************/
/**
\file
EtherCAT CoE state machines.
*/
/*****************************************************************************/
#include "globals.h"
#include "master.h"
#include "mailbox.h"
#include "fsm_coe.h"
/*****************************************************************************/
/** Maximum time in ms to wait for responses when reading out the dictionary.
*/
#define EC_FSM_COE_DICT_TIMEOUT 1000
/** CoE download request header size.
*/
#define EC_COE_DOWN_REQ_HEADER_SIZE 10
/** CoE download segment request header size.
*/
#define EC_COE_DOWN_SEG_REQ_HEADER_SIZE 3
/** Minimum size of download segment.
*/
#define EC_COE_DOWN_SEG_MIN_DATA_SIZE 7
/** Enable debug output for CoE retries.
*/
#define DEBUG_RETRIES 0
/** Enable warning output if transfers take too long.
*/
#define DEBUG_LONG 0
/*****************************************************************************/
void ec_fsm_coe_dict_start(ec_fsm_coe_t *);
void ec_fsm_coe_dict_request(ec_fsm_coe_t *);
void ec_fsm_coe_dict_check(ec_fsm_coe_t *);
void ec_fsm_coe_dict_response(ec_fsm_coe_t *);
void ec_fsm_coe_dict_desc_request(ec_fsm_coe_t *);
void ec_fsm_coe_dict_desc_check(ec_fsm_coe_t *);
void ec_fsm_coe_dict_desc_response(ec_fsm_coe_t *);
void ec_fsm_coe_dict_entry_request(ec_fsm_coe_t *);
void ec_fsm_coe_dict_entry_check(ec_fsm_coe_t *);
void ec_fsm_coe_dict_entry_response(ec_fsm_coe_t *);
void ec_fsm_coe_down_start(ec_fsm_coe_t *);
void ec_fsm_coe_down_request(ec_fsm_coe_t *);
void ec_fsm_coe_down_check(ec_fsm_coe_t *);
void ec_fsm_coe_down_response(ec_fsm_coe_t *);
void ec_fsm_coe_down_seg_check(ec_fsm_coe_t *);
void ec_fsm_coe_down_seg_response(ec_fsm_coe_t *);
void ec_fsm_coe_up_start(ec_fsm_coe_t *);
void ec_fsm_coe_up_request(ec_fsm_coe_t *);
void ec_fsm_coe_up_check(ec_fsm_coe_t *);
void ec_fsm_coe_up_response(ec_fsm_coe_t *);
void ec_fsm_coe_up_seg_request(ec_fsm_coe_t *);
void ec_fsm_coe_up_seg_check(ec_fsm_coe_t *);
void ec_fsm_coe_up_seg_response(ec_fsm_coe_t *);
void ec_fsm_coe_end(ec_fsm_coe_t *);
void ec_fsm_coe_error(ec_fsm_coe_t *);
/*****************************************************************************/
/**
SDO abort messages.
The "abort SDO transfer request" supplies an abort code,
which can be translated to clear text. This table does
the mapping of the codes and messages.
*/
const ec_code_msg_t sdo_abort_messages[] = {
{0x05030000, "Toggle bit not changed"},
{0x05040000, "SDO protocol timeout"},
{0x05040001, "Client/Server command specifier not valid or unknown"},
{0x05040005, "Out of memory"},
{0x06010000, "Unsupported access to an object"},
{0x06010001, "Attempt to read a write-only object"},
{0x06010002, "Attempt to write a read-only object"},
{0x06020000, "This object does not exist in the object directory"},
{0x06040041, "The object cannot be mapped into the PDO"},
{0x06040042, "The number and length of the objects to be mapped would"
" exceed the PDO length"},
{0x06040043, "General parameter incompatibility reason"},
{0x06040047, "Gerneral internal incompatibility in device"},
{0x06060000, "Access failure due to a hardware error"},
{0x06070010, "Data type does not match, length of service parameter does"
" not match"},
{0x06070012, "Data type does not match, length of service parameter too"
" high"},
{0x06070013, "Data type does not match, length of service parameter too"
" low"},
{0x06090011, "Subindex does not exist"},
{0x06090030, "Value range of parameter exceeded"},
{0x06090031, "Value of parameter written too high"},
{0x06090032, "Value of parameter written too low"},
{0x06090036, "Maximum value is less than minimum value"},
{0x08000000, "General error"},
{0x08000020, "Data cannot be transferred or stored to the application"},
{0x08000021, "Data cannot be transferred or stored to the application"
" because of local control"},
{0x08000022, "Data cannot be transferred or stored to the application"
" because of the present device state"},
{0x08000023, "Object dictionary dynamic generation fails or no object"
" dictionary is present"},
{}
};
/*****************************************************************************/
/** Outputs an SDO abort message.
*/
void ec_canopen_abort_msg(const ec_slave_t *slave, uint32_t abort_code)
{
const ec_code_msg_t *abort_msg;
for (abort_msg = sdo_abort_messages; abort_msg->code; abort_msg++) {
if (abort_msg->code == abort_code) {
EC_SLAVE_ERR(slave, "SDO abort message 0x%08X: \"%s\".\n",
abort_msg->code, abort_msg->message);
return;
}
}
EC_SLAVE_ERR(slave, "Unknown SDO abort code 0x%08X.\n", abort_code);
}
/*****************************************************************************/
/**
Constructor.
*/
void ec_fsm_coe_init(ec_fsm_coe_t *fsm, /**< finite state machine */
ec_mailbox_t *mbox /**< mailbox */
)
{
fsm->state = NULL;
fsm->mbox = mbox;
}
/*****************************************************************************/
/**
Destructor.
*/
void ec_fsm_coe_clear(ec_fsm_coe_t *fsm /**< finite state machine */)
{
}
/*****************************************************************************/
/**
Starts reading a slaves' SDO dictionary.
*/
void ec_fsm_coe_dictionary(ec_fsm_coe_t *fsm, /**< finite state machine */
ec_slave_t *slave /**< EtherCAT slave */
)
{
fsm->slave = slave;
fsm->state = ec_fsm_coe_dict_start;
}
/*****************************************************************************/
/**
Starts to transfer an SDO to/from a slave.
*/
void ec_fsm_coe_transfer(
ec_fsm_coe_t *fsm, /**< State machine. */
ec_slave_t *slave, /**< EtherCAT slave. */
ec_sdo_request_t *request /**< SDO request. */
)
{
fsm->slave = slave;
fsm->request = request;
if (request->dir == EC_DIR_OUTPUT)
fsm->state = ec_fsm_coe_down_start;
else
fsm->state = ec_fsm_coe_up_start;
}
/*****************************************************************************/
/**
Executes the current state of the state machine.
\return false, if state machine has terminated
*/
int ec_fsm_coe_exec(ec_fsm_coe_t *fsm /**< finite state machine */)
{
fsm->state(fsm);
return fsm->state != ec_fsm_coe_end && fsm->state != ec_fsm_coe_error;
}
/*****************************************************************************/
/**
Returns, if the state machine terminated with success.
\return non-zero if successful.
*/
int ec_fsm_coe_success(ec_fsm_coe_t *fsm /**< Finite state machine */)
{
return fsm->state == ec_fsm_coe_end;
}
/*****************************************************************************/
/** Check if the received data are a CoE emergency request.
*
* If the check is positive, the emergency request is output.
*
* \return The data were an emergency request.
*/
int ec_fsm_coe_check_emergency(
ec_fsm_coe_t *fsm, /**< Finite state machine */
const uint8_t *data, /**< CoE mailbox data. */
size_t size /**< CoE mailbox data size. */
)
{
if (size < 2 || ((EC_READ_U16(data) >> 12) & 0x0F) != 0x01)
return 0;
if (size < 10) {
EC_SLAVE_WARN(fsm->slave, "Received incomplete CoE Emergency"
" request:\n");
ec_print_data(data, size);
return 1;
}
EC_SLAVE_WARN(fsm->slave, "CoE Emergency Request received:\n"
"Error code 0x%04X, Error register 0x%02X, data:\n",
EC_READ_U16(data + 2), EC_READ_U8(data + 4));
ec_print_data(data + 5, 5);
return 1;
}
/******************************************************************************
* CoE dictionary state machine
*****************************************************************************/
/**
CoE state: DICT START.
*/
void ec_fsm_coe_dict_start(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_slave_t *slave = fsm->slave;
uint8_t *data;
if (!(slave->sii.mailbox_protocols & EC_MBOX_COE)) {
EC_SLAVE_ERR(slave, "Slave does not support CoE!\n");
fsm->state = ec_fsm_coe_error;
return;
}
if (slave->sii.has_general && !slave->sii.coe_details.enable_sdo_info) {
EC_SLAVE_ERR(slave, "Slave does not support"
" SDO information service!\n");
fsm->state = ec_fsm_coe_error;
return;
}
data = ec_slave_mbox_prepare_send(slave, mbox, 0x03, 8);
if (IS_ERR(data)) {
fsm->state = ec_fsm_coe_error;
return;
}
EC_WRITE_U16(data, 0x8 << 12); // SDO information
EC_WRITE_U8 (data + 2, 0x01); // Get OD List Request
EC_WRITE_U8 (data + 3, 0x00);
EC_WRITE_U16(data + 4, 0x0000);
EC_WRITE_U16(data + 6, 0x0001); // deliver all SDOs!
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_request;
}
/*****************************************************************************/
/**
CoE state: DICT REQUEST.
\todo Timeout behavior
*/
void ec_fsm_coe_dict_request(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return; // FIXME: request again?
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE dictionary"
" request datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE dictionary request failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
fsm->jiffies_start = datagram->jiffies_sent;
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_check;
}
/*****************************************************************************/
/**
CoE state: DICT CHECK.
*/
void ec_fsm_coe_dict_check(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return;
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE mailbox check datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE mailbox check"
" datagram failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
if (!ec_slave_mbox_check(mbox)) {
unsigned long diff_ms =
(datagram->jiffies_received - fsm->jiffies_start) * 1000 / HZ;
if (diff_ms >= EC_FSM_COE_DICT_TIMEOUT) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Timeout while waiting for"
" SDO dictionary list response.\n");
return;
}
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
return;
}
// Fetch response
ec_slave_mbox_prepare_fetch(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_response;
}
/*****************************************************************************/
/**
CoE state: DICT RESPONSE.
\todo Timeout behavior
*/
void ec_fsm_coe_dict_response(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
uint8_t *data, mbox_prot;
size_t rec_size;
unsigned int sdo_count, i;
uint16_t sdo_index, fragments_left;
ec_sdo_t *sdo;
bool first_segment;
size_t index_list_offset;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return; // FIXME: request again?
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE dictionary"
" response datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE dictionary response failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
data = ec_slave_mbox_fetch(slave, mbox, &mbox_prot, &rec_size);
if (IS_ERR(data)) {
fsm->state = ec_fsm_coe_error;
return;
}
if (mbox_prot != 0x03) { // CoE
EC_SLAVE_ERR(slave, "Received mailbox protocol 0x%02X as response.\n",
mbox_prot);
fsm->state = ec_fsm_coe_error;
return;
}
if (ec_fsm_coe_check_emergency(fsm, data, rec_size)) {
// check for CoE response again
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_check;
return;
}
if (rec_size < 3) {
EC_SLAVE_ERR(slave, "Received corrupted SDO dictionary response"
" (size %zu).\n", rec_size);
fsm->state = ec_fsm_coe_error;
return;
}
if (EC_READ_U16(data) >> 12 == 0x8 && // SDO information
(EC_READ_U8(data + 2) & 0x7F) == 0x07) { // error response
EC_SLAVE_ERR(slave, "SDO information error response!\n");
if (rec_size < 10) {
EC_SLAVE_ERR(slave, "Incomplete SDO information"
" error response:\n");
ec_print_data(data, rec_size);
} else {
ec_canopen_abort_msg(slave, EC_READ_U32(data + 6));
}
fsm->state = ec_fsm_coe_error;
return;
}
if (EC_READ_U16(data) >> 12 != 0x8 || // SDO information
(EC_READ_U8 (data + 2) & 0x7F) != 0x02) { // Get OD List response
if (fsm->slave->master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Invalid SDO list response!"
" Retrying...\n");
ec_print_data(data, rec_size);
}
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_check;
return;
}
first_segment = list_empty(&slave->sdo_dictionary) ? true : false;
index_list_offset = first_segment ? 8 : 6;
if (rec_size < index_list_offset || rec_size % 2) {
EC_SLAVE_ERR(slave, "Invalid data size %zu !\n", rec_size);
ec_print_data(data, rec_size);
fsm->state = ec_fsm_coe_error;
return;
}
sdo_count = (rec_size - index_list_offset) / 2;
for (i = 0; i < sdo_count; i++) {
sdo_index = EC_READ_U16(data + index_list_offset + i * 2);
if (!sdo_index) {
EC_SLAVE_DBG(slave, 1, "SDO dictionary contains index 0x0000.\n");
continue;
}
if (!(sdo = (ec_sdo_t *) kmalloc(sizeof(ec_sdo_t), GFP_KERNEL))) {
EC_SLAVE_ERR(slave, "Failed to allocate memory for SDO!\n");
fsm->state = ec_fsm_coe_error;
return;
}
ec_sdo_init(sdo, slave, sdo_index);
list_add_tail(&sdo->list, &slave->sdo_dictionary);
}
fragments_left = EC_READ_U16(data + 4);
if (fragments_left) {
EC_SLAVE_DBG(slave, 1, "SDO list fragments left: %u\n",
fragments_left);
}
if (EC_READ_U8(data + 2) & 0x80 || fragments_left) {
// more messages waiting. check again.
fsm->jiffies_start = datagram->jiffies_sent;
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_check;
return;
}
if (list_empty(&slave->sdo_dictionary)) {
// no SDOs in dictionary. finished.
fsm->state = ec_fsm_coe_end; // success
return;
}
// fetch SDO descriptions
fsm->sdo = list_entry(slave->sdo_dictionary.next, ec_sdo_t, list);
data = ec_slave_mbox_prepare_send(slave, mbox, 0x03, 8);
if (IS_ERR(data)) {
fsm->state = ec_fsm_coe_error;
return;
}
EC_WRITE_U16(data, 0x8 << 12); // SDO information
EC_WRITE_U8 (data + 2, 0x03); // Get object description request
EC_WRITE_U8 (data + 3, 0x00);
EC_WRITE_U16(data + 4, 0x0000);
EC_WRITE_U16(data + 6, fsm->sdo->index); // SDO index
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_desc_request;
}
/*****************************************************************************/
/**
CoE state: DICT DESC REQUEST.
\todo Timeout behavior
*/
void ec_fsm_coe_dict_desc_request(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--)
return; // FIXME: check for response first?
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE SDO"
" description request datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE SDO description"
" request failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
fsm->jiffies_start = datagram->jiffies_sent;
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_desc_check;
}
/*****************************************************************************/
/**
CoE state: DICT DESC CHECK.
*/
void ec_fsm_coe_dict_desc_check(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return;
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE mailbox check datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE mailbox check"
" datagram failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
if (!ec_slave_mbox_check(mbox)) {
unsigned long diff_ms =
(datagram->jiffies_received - fsm->jiffies_start) * 1000 / HZ;
if (diff_ms >= EC_FSM_COE_DICT_TIMEOUT) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Timeout while waiting for"
" SDO 0x%04x object description response.\n",
fsm->sdo->index);
return;
}
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
return;
}
// Fetch response
ec_slave_mbox_prepare_fetch(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_desc_response;
}
/*****************************************************************************/
/**
CoE state: DICT DESC RESPONSE.
\todo Timeout behavior
*/
void ec_fsm_coe_dict_desc_response(ec_fsm_coe_t *fsm
/**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
ec_sdo_t *sdo = fsm->sdo;
uint8_t *data, mbox_prot;
size_t rec_size, name_size;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return; // FIXME: request again?
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE SDO description"
" response datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE SDO description"
" response failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
data = ec_slave_mbox_fetch(slave, mbox, &mbox_prot, &rec_size);
if (IS_ERR(data)) {
fsm->state = ec_fsm_coe_error;
return;
}
if (mbox_prot != 0x03) { // CoE
EC_SLAVE_ERR(slave, "Received mailbox protocol 0x%02X as response.\n",
mbox_prot);
fsm->state = ec_fsm_coe_error;
return;
}
if (ec_fsm_coe_check_emergency(fsm, data, rec_size)) {
// check for CoE response again
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_desc_check;
return;
}
if (rec_size < 3) {
EC_SLAVE_ERR(slave, "Received corrupted SDO description response"
" (size %zu).\n", rec_size);
fsm->state = ec_fsm_coe_error;
return;
}
if (EC_READ_U16(data) >> 12 == 0x8 && // SDO information
(EC_READ_U8 (data + 2) & 0x7F) == 0x07) { // error response
EC_SLAVE_ERR(slave, "SDO information error response while"
" fetching SDO 0x%04X!\n", sdo->index);
ec_canopen_abort_msg(slave, EC_READ_U32(data + 6));
fsm->state = ec_fsm_coe_error;
return;
}
if (rec_size < 8) {
EC_SLAVE_ERR(slave, "Received corrupted SDO"
" description response (size %zu).\n", rec_size);
fsm->state = ec_fsm_coe_error;
return;
}
if (EC_READ_U16(data) >> 12 != 0x8 || // SDO information
(EC_READ_U8 (data + 2) & 0x7F) != 0x04 || // Object desc. response
EC_READ_U16(data + 6) != sdo->index) { // SDO index
if (fsm->slave->master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Invalid object description response while"
" fetching SDO 0x%04X!\n", sdo->index);
ec_print_data(data, rec_size);
}
// check for CoE response again
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_desc_check;
return;
}
if (rec_size < 12) {
EC_SLAVE_ERR(slave, "Invalid data size!\n");
ec_print_data(data, rec_size);
fsm->state = ec_fsm_coe_error;
return;
}
sdo->max_subindex = EC_READ_U8(data + 10);
sdo->object_code = EC_READ_U8(data + 11);
name_size = rec_size - 12;
if (name_size) {
if (!(sdo->name = kmalloc(name_size + 1, GFP_KERNEL))) {
EC_SLAVE_ERR(slave, "Failed to allocate SDO name!\n");
fsm->state = ec_fsm_coe_error;
return;
}
memcpy(sdo->name, data + 12, name_size);
sdo->name[name_size] = 0;
}
if (EC_READ_U8(data + 2) & 0x80) {
EC_SLAVE_ERR(slave, "Fragment follows (not implemented)!\n");
fsm->state = ec_fsm_coe_error;
return;
}
// start fetching entries
fsm->subindex = 0;
data = ec_slave_mbox_prepare_send(slave, mbox, 0x03, 10);
if (IS_ERR(data)) {
fsm->state = ec_fsm_coe_error;
return;
}
EC_WRITE_U16(data, 0x8 << 12); // SDO information
EC_WRITE_U8 (data + 2, 0x05); // Get entry description request
EC_WRITE_U8 (data + 3, 0x00);
EC_WRITE_U16(data + 4, 0x0000);
EC_WRITE_U16(data + 6, sdo->index); // SDO index
EC_WRITE_U8 (data + 8, fsm->subindex); // SDO subindex
EC_WRITE_U8 (data + 9, 0x01); // value info (access rights only)
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_entry_request;
}
/*****************************************************************************/
/**
CoE state: DICT ENTRY REQUEST.
\todo Timeout behavior
*/
void ec_fsm_coe_dict_entry_request(ec_fsm_coe_t *fsm
/**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return; // FIXME: check for response first?
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE SDO entry"
" request datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE SDO entry request failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
fsm->jiffies_start = datagram->jiffies_sent;
ec_slave_mbox_prepare_check(slave, mbox); // can not fail
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_entry_check;
}
/*****************************************************************************/
/**
CoE state: DICT ENTRY CHECK.
*/
void ec_fsm_coe_dict_entry_check(ec_fsm_coe_t *fsm
/**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return;
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE mailbox check datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE mailbox check"
" datagram failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
if (!ec_slave_mbox_check(mbox)) {
unsigned long diff_ms =
(datagram->jiffies_received - fsm->jiffies_start) * 1000 / HZ;
if (diff_ms >= EC_FSM_COE_DICT_TIMEOUT) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Timeout while waiting for"
" SDO entry 0x%04x:%x description response.\n",
fsm->sdo->index, fsm->subindex);
return;
}
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
return;
}
// Fetch response
ec_slave_mbox_prepare_fetch(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_entry_response;
}
/*****************************************************************************/
/**
CoE state: DICT ENTRY RESPONSE.
\todo Timeout behavior
*/
void ec_fsm_coe_dict_entry_response(ec_fsm_coe_t *fsm
/**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
ec_sdo_t *sdo = fsm->sdo;
uint8_t *data, mbox_prot;
size_t rec_size, data_size;
ec_sdo_entry_t *entry;
u16 word;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return; // FIXME: request again?
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE SDO"
" description response datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE SDO description"
" response failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
data = ec_slave_mbox_fetch(slave, mbox, &mbox_prot, &rec_size);
if (IS_ERR(data)) {
fsm->state = ec_fsm_coe_error;
return;
}
if (mbox_prot != 0x03) { // CoE
EC_SLAVE_ERR(slave, "Received mailbox protocol"
" 0x%02X as response.\n", mbox_prot);
fsm->state = ec_fsm_coe_error;
return;
}
if (ec_fsm_coe_check_emergency(fsm, data, rec_size)) {
// check for CoE response again
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_entry_check;
return;
}
if (rec_size < 3) {
EC_SLAVE_ERR(slave, "Received corrupted SDO entry"
" description response (size %zu).\n", rec_size);
fsm->state = ec_fsm_coe_error;
return;
}
if (EC_READ_U16(data) >> 12 == 0x8 && // SDO information
(EC_READ_U8 (data + 2) & 0x7F) == 0x07) { // error response
EC_SLAVE_WARN(slave, "SDO information error response while"
" fetching SDO entry 0x%04X:%02X!\n",
sdo->index, fsm->subindex);
ec_canopen_abort_msg(slave, EC_READ_U32(data + 6));
/* There may be gaps in the subindices, so try to continue with next
* subindex. */
} else {
if (rec_size < 9) {
EC_SLAVE_ERR(slave, "Received corrupted SDO entry"
" description response (size %zu).\n", rec_size);
fsm->state = ec_fsm_coe_error;
return;
}
if (EC_READ_U16(data) >> 12 != 0x8 || // SDO information
(EC_READ_U8(data + 2) & 0x7F) != 0x06 || // Entry desc. resp.
EC_READ_U16(data + 6) != sdo->index || // SDO index
EC_READ_U8(data + 8) != fsm->subindex) { // SDO subindex
if (fsm->slave->master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Invalid entry description response"
" while fetching SDO entry 0x%04X:%02X!\n",
sdo->index, fsm->subindex);
ec_print_data(data, rec_size);
}
// check for CoE response again
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_entry_check;
return;
}
if (rec_size < 16) {
EC_SLAVE_ERR(slave, "Invalid data size %zu!\n", rec_size);
ec_print_data(data, rec_size);
fsm->state = ec_fsm_coe_error;
return;
}
data_size = rec_size - 16;
if (!(entry = (ec_sdo_entry_t *)
kmalloc(sizeof(ec_sdo_entry_t), GFP_KERNEL))) {
EC_SLAVE_ERR(slave, "Failed to allocate entry!\n");
fsm->state = ec_fsm_coe_error;
return;
}
ec_sdo_entry_init(entry, sdo, fsm->subindex);
entry->data_type = EC_READ_U16(data + 10);
entry->bit_length = EC_READ_U16(data + 12);
// read access rights
word = EC_READ_U16(data + 14);
entry->read_access[EC_SDO_ENTRY_ACCESS_PREOP] = word & 0x0001;
entry->read_access[EC_SDO_ENTRY_ACCESS_SAFEOP] = (word >> 1) & 0x0001;
entry->read_access[EC_SDO_ENTRY_ACCESS_OP] = (word >> 2) & 0x0001;
entry->write_access[EC_SDO_ENTRY_ACCESS_PREOP] = (word >> 3) & 0x0001;
entry->write_access[EC_SDO_ENTRY_ACCESS_SAFEOP] = (word >> 4) & 0x0001;
entry->write_access[EC_SDO_ENTRY_ACCESS_OP] = (word >> 5) & 0x0001;
if (data_size) {
uint8_t *desc;
if (!(desc = kmalloc(data_size + 1, GFP_KERNEL))) {
EC_SLAVE_ERR(slave, "Failed to allocate SDO entry name!\n");
fsm->state = ec_fsm_coe_error;
return;
}
memcpy(desc, data + 16, data_size);
desc[data_size] = 0;
entry->description = desc;
}
list_add_tail(&entry->list, &sdo->entries);
}
if (fsm->subindex < sdo->max_subindex) {
fsm->subindex++;
data = ec_slave_mbox_prepare_send(slave, mbox, 0x03, 10);
if (IS_ERR(data)) {
fsm->state = ec_fsm_coe_error;
return;
}
EC_WRITE_U16(data, 0x8 << 12); // SDO information
EC_WRITE_U8 (data + 2, 0x05); // Get entry description request
EC_WRITE_U8 (data + 3, 0x00);
EC_WRITE_U16(data + 4, 0x0000);
EC_WRITE_U16(data + 6, sdo->index); // SDO index
EC_WRITE_U8 (data + 8, fsm->subindex); // SDO subindex
EC_WRITE_U8 (data + 9, 0x00); // value info (no values)
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_entry_request;
return;
}
// another SDO description to fetch?
if (fsm->sdo->list.next != &slave->sdo_dictionary) {
fsm->sdo = list_entry(fsm->sdo->list.next, ec_sdo_t, list);
data = ec_slave_mbox_prepare_send(slave, mbox, 0x03, 8);
if (IS_ERR(data)) {
fsm->state = ec_fsm_coe_error;
return;
}
EC_WRITE_U16(data, 0x8 << 12); // SDO information
EC_WRITE_U8 (data + 2, 0x03); // Get object description request
EC_WRITE_U8 (data + 3, 0x00);
EC_WRITE_U16(data + 4, 0x0000);
EC_WRITE_U16(data + 6, fsm->sdo->index); // SDO index
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_dict_desc_request;
return;
}
fsm->state = ec_fsm_coe_end;
}
/******************************************************************************
* CoE state machine
*****************************************************************************/
/** CoE state: DOWN START.
*/
void ec_fsm_coe_down_start(
ec_fsm_coe_t *fsm /**< finite state machine */
)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_slave_t *slave = fsm->slave;
ec_sdo_request_t *request = fsm->request;
uint8_t *data;
uint8_t data_set_size;
if (fsm->slave->master->debug_level) {
char subidxstr[10];
if (request->complete_access) {
subidxstr[0] = 0x00;
} else {
sprintf(subidxstr, ":%02X", request->subindex);
}
EC_SLAVE_DBG(slave, 1, "Downloading SDO 0x%04X%s.\n",
request->index, subidxstr);
ec_print_data(request->data, request->data_size);
}
if (!(slave->sii.mailbox_protocols & EC_MBOX_COE)) {
EC_SLAVE_ERR(slave, "Slave does not support CoE!\n");
request->errno = EPROTONOSUPPORT;
fsm->state = ec_fsm_coe_error;
return;
}
if (slave->configured_rx_mailbox_size <
EC_MBOX_HEADER_SIZE + EC_COE_DOWN_REQ_HEADER_SIZE) {
EC_SLAVE_ERR(slave, "Mailbox too small!\n");
request->errno = EOVERFLOW;
fsm->state = ec_fsm_coe_error;
return;
}
if (request->data_size <= 4) { // use expedited transfer type
data = ec_slave_mbox_prepare_send(slave, mbox, 0x03,
EC_COE_DOWN_REQ_HEADER_SIZE);
if (IS_ERR(data)) {
request->errno = PTR_ERR(data);
fsm->state = ec_fsm_coe_error;
return;
}
fsm->remaining = 0;
data_set_size = 4 - request->data_size;
EC_WRITE_U16(data, 0x2 << 12); // SDO request
EC_WRITE_U8 (data + 2, (0x3 // size specified, expedited
| data_set_size << 2
| ((request->complete_access ? 1 : 0) << 4)
| 0x1 << 5)); // Download request
EC_WRITE_U16(data + 3, request->index);
EC_WRITE_U8 (data + 5,
request->complete_access ? 0x00 : request->subindex);
memcpy(data + 6, request->data, request->data_size);
memset(data + 6 + request->data_size, 0x00, 4 - request->data_size);
if (slave->master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Expedited download request:\n");
ec_print_data(data, EC_COE_DOWN_REQ_HEADER_SIZE);
}
}
else { // request->data_size > 4, use normal transfer type
size_t data_size,
max_data_size =
slave->configured_rx_mailbox_size - EC_MBOX_HEADER_SIZE,
required_data_size =
EC_COE_DOWN_REQ_HEADER_SIZE + request->data_size;
if (max_data_size < required_data_size) {
// segmenting needed
data_size = max_data_size;
} else {
data_size = required_data_size;
}
data = ec_slave_mbox_prepare_send(slave, mbox, 0x03,
data_size);
if (IS_ERR(data)) {
request->errno = PTR_ERR(data);
fsm->state = ec_fsm_coe_error;
return;
}
fsm->offset = 0;
fsm->remaining = request->data_size;
EC_WRITE_U16(data, 0x2 << 12); // SDO request
EC_WRITE_U8(data + 2,
0x1 // size indicator, normal
| ((request->complete_access ? 1 : 0) << 4)
| 0x1 << 5); // Download request
EC_WRITE_U16(data + 3, request->index);
EC_WRITE_U8 (data + 5,
request->complete_access ? 0x00 : request->subindex);
EC_WRITE_U32(data + 6, request->data_size);
if (data_size > EC_COE_DOWN_REQ_HEADER_SIZE) {
size_t segment_size = data_size - EC_COE_DOWN_REQ_HEADER_SIZE;
memcpy(data + EC_COE_DOWN_REQ_HEADER_SIZE,
request->data, segment_size);
fsm->offset += segment_size;
fsm->remaining -= segment_size;
}
if (slave->master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Normal download request:\n");
ec_print_data(data, data_size);
}
}
fsm->request->jiffies_sent = jiffies;
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_down_request;
}
/*****************************************************************************/
/**
CoE state: DOWN REQUEST.
\todo Timeout behavior
*/
void ec_fsm_coe_down_request(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
unsigned long diff_ms;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return; // FIXME: check for response first?
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE download"
" request datagram: ");
ec_datagram_print_state(datagram);
return;
}
diff_ms = (jiffies - fsm->request->jiffies_sent) * 1000 / HZ;
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
if (ec_mbox_is_datagram_wc(mbox, 0)) {
if (diff_ms < fsm->request->response_timeout) {
#if DEBUG_RETRIES
EC_SLAVE_DBG(slave, 1, "Slave did not respond to SDO"
" download request. Retrying after %lu ms...\n",
diff_ms);
#endif
// no response; send request datagram again
return;
}
}
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE download request"
" for SDO 0x%04x:%x failed with timeout after %lu ms: ",
fsm->request->index, fsm->request->subindex, diff_ms);
ec_datagram_print_wc_error(datagram);
return;
}
#if DEBUG_LONG
if (diff_ms > 200) {
EC_SLAVE_WARN(slave, "SDO 0x%04x:%x download took %lu ms.\n",
fsm->request->index, fsm->request->subindex, diff_ms);
}
#endif
fsm->jiffies_start = datagram->jiffies_sent;
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_down_check;
}
/*****************************************************************************/
/** CoE state: DOWN CHECK.
*/
void ec_fsm_coe_down_check(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return;
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE mailbox check"
" datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE mailbox check"
" datagram failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
if (!ec_slave_mbox_check(mbox)) {
unsigned long diff_ms =
(datagram->jiffies_received - fsm->jiffies_start) * 1000 / HZ;
if (diff_ms >= fsm->request->response_timeout) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Timeout after %lu ms while waiting"
" for SDO 0x%04x:%x download response.\n", diff_ms,
fsm->request->index, fsm->request->subindex);
return;
}
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
return;
}
// Fetch response
ec_slave_mbox_prepare_fetch(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_down_response;
}
/*****************************************************************************/
/** Prepare a download segment request.
*/
void ec_fsm_coe_down_prepare_segment_request(
ec_fsm_coe_t *fsm /**< finite state machine */
)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_slave_t *slave = fsm->slave;
ec_sdo_request_t *request = fsm->request;
size_t max_segment_size =
slave->configured_rx_mailbox_size
- EC_MBOX_HEADER_SIZE
- EC_COE_DOWN_SEG_REQ_HEADER_SIZE;
size_t segment_size, data_size;
uint8_t last_segment, seg_data_size, *data;
if (fsm->remaining > max_segment_size) {
segment_size = max_segment_size;
last_segment = 0;
} else {
segment_size = fsm->remaining;
last_segment = 1;
}
if (segment_size > EC_COE_DOWN_SEG_MIN_DATA_SIZE) {
seg_data_size = 0x00;
data_size = EC_COE_DOWN_SEG_REQ_HEADER_SIZE + segment_size;
} else {
seg_data_size = EC_COE_DOWN_SEG_MIN_DATA_SIZE - segment_size;
data_size = EC_COE_DOWN_SEG_REQ_HEADER_SIZE
+ EC_COE_DOWN_SEG_MIN_DATA_SIZE;
}
data = ec_slave_mbox_prepare_send(slave, mbox, 0x03,
data_size);
if (IS_ERR(data)) {
request->errno = PTR_ERR(data);
fsm->state = ec_fsm_coe_error;
return;
}
EC_WRITE_U16(data, 0x2 << 12); // SDO request
EC_WRITE_U8(data + 2, (last_segment ? 1 : 0)
| (seg_data_size << 1)
| (fsm->toggle << 4)
| (0x00 << 5)); // Download segment request
memcpy(data + EC_COE_DOWN_SEG_REQ_HEADER_SIZE,
request->data + fsm->offset, segment_size);
if (segment_size < EC_COE_DOWN_SEG_MIN_DATA_SIZE) {
memset(data + EC_COE_DOWN_SEG_REQ_HEADER_SIZE + segment_size, 0x00,
EC_COE_DOWN_SEG_MIN_DATA_SIZE - segment_size);
}
fsm->offset += segment_size;
fsm->remaining -= segment_size;
if (slave->master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Download segment request:\n");
ec_print_data(data, data_size);
}
fsm->state = ec_fsm_coe_down_seg_check;
}
/*****************************************************************************/
/**
CoE state: DOWN RESPONSE.
\todo Timeout behavior
*/
void ec_fsm_coe_down_response(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = fsm->mbox->datagram;
ec_slave_t *slave = fsm->slave;
uint8_t *data, mbox_prot;
size_t rec_size;
ec_sdo_request_t *request = fsm->request;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return; // FIXME: request again?
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE download"
" response datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE download response failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
data = ec_slave_mbox_fetch(slave, mbox, &mbox_prot, &rec_size);
if (IS_ERR(data)) {
request->errno = PTR_ERR(data);
fsm->state = ec_fsm_coe_error;
return;
}
if (mbox_prot != 0x03) { // CoE
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Received mailbox protocol 0x%02X as response.\n",
mbox_prot);
return;
}
if (ec_fsm_coe_check_emergency(fsm, data, rec_size)) {
// check for CoE response again
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_down_check;
return;
}
if (slave->master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Download response:\n");
ec_print_data(data, rec_size);
}
if (rec_size < 6) {
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Received data are too small (%zu bytes):\n",
rec_size);
ec_print_data(data, rec_size);
return;
}
if (EC_READ_U16(data) >> 12 == 0x2 && // SDO request
EC_READ_U8 (data + 2) >> 5 == 0x4) { // abort SDO transfer request
char subidxstr[10];
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
if (request->complete_access) {
subidxstr[0] = 0x00;
} else {
sprintf(subidxstr, ":%02X", request->subindex);
}
EC_SLAVE_ERR(slave, "SDO download 0x%04X%s (%zu bytes) aborted.\n",
request->index, subidxstr, request->data_size);
if (rec_size < 10) {
EC_SLAVE_ERR(slave, "Incomplete abort command:\n");
ec_print_data(data, rec_size);
} else {
fsm->request->abort_code = EC_READ_U32(data + 6);
ec_canopen_abort_msg(slave, fsm->request->abort_code);
}
return;
}
if (EC_READ_U16(data) >> 12 != 0x3 || // SDO response
EC_READ_U8 (data + 2) >> 5 != 0x3 || // Download response
EC_READ_U16(data + 3) != request->index || // index
EC_READ_U8 (data + 5) != request->subindex) { // subindex
if (slave->master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Invalid SDO download response!"
" Retrying...\n");
ec_print_data(data, rec_size);
}
// check for CoE response again
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_down_check;
return;
}
if (fsm->remaining) { // more segments to download
fsm->toggle = 0;
ec_fsm_coe_down_prepare_segment_request(fsm);
} else {
fsm->state = ec_fsm_coe_end; // success
}
}
/*****************************************************************************/
/**
CoE state: DOWN SEG CHECK.
*/
void ec_fsm_coe_down_seg_check(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return;
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE mailbox check datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE mailbox segment check"
" datagram failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
if (!ec_slave_mbox_check(mbox)) {
unsigned long diff_ms =
(datagram->jiffies_received - fsm->jiffies_start) * 1000 / HZ;
if (diff_ms >= fsm->request->response_timeout) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Timeout while waiting for SDO download"
" segment response.\n");
return;
}
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
return;
}
// Fetch response
ec_slave_mbox_prepare_fetch(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_down_seg_response;
}
/*****************************************************************************/
/**
CoE state: DOWN SEG RESPONSE.
\todo Timeout behavior
*/
void ec_fsm_coe_down_seg_response(
ec_fsm_coe_t *fsm /**< finite state machine */
)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
uint8_t *data, mbox_prot;
size_t rec_size;
ec_sdo_request_t *request = fsm->request;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return; // FIXME: request again?
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE download response"
" datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE download response failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
data = ec_slave_mbox_fetch(slave, mbox, &mbox_prot, &rec_size);
if (IS_ERR(data)) {
request->errno = PTR_ERR(data);
fsm->state = ec_fsm_coe_error;
return;
}
if (mbox_prot != 0x03) { // CoE
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Received mailbox protocol 0x%02X as response.\n",
mbox_prot);
return;
}
if (ec_fsm_coe_check_emergency(fsm, data, rec_size)) {
// check for CoE response again
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_down_check;
return;
}
if (slave->master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Download response:\n");
ec_print_data(data, rec_size);
}
if (rec_size < 6) {
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Received data are too small (%zu bytes):\n",
rec_size);
ec_print_data(data, rec_size);
return;
}
if (EC_READ_U16(data) >> 12 == 0x2 && // SDO request
EC_READ_U8 (data + 2) >> 5 == 0x4) { // abort SDO transfer request
char subidxstr[10];
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
if (request->complete_access) {
subidxstr[0] = 0x00;
} else {
sprintf(subidxstr, ":%02X", request->subindex);
}
EC_SLAVE_ERR(slave, "SDO download 0x%04X%s (%zu bytes) aborted.\n",
request->index, subidxstr, request->data_size);
if (rec_size < 10) {
EC_SLAVE_ERR(slave, "Incomplete abort command:\n");
ec_print_data(data, rec_size);
} else {
fsm->request->abort_code = EC_READ_U32(data + 6);
ec_canopen_abort_msg(slave, fsm->request->abort_code);
}
return;
}
if (EC_READ_U16(data) >> 12 != 0x3 ||
((EC_READ_U8(data + 2) >> 5) != 0x01)) { // segment response
if (slave->master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Invalid SDO download response!"
" Retrying...\n");
ec_print_data(data, rec_size);
}
// check for CoE response again
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_down_seg_check;
return;
}
if (((EC_READ_U8(data + 2) >> 4) & 0x01) != fsm->toggle) {
EC_SLAVE_ERR(slave, "Invalid toggle received during"
" segmented download:\n");
ec_print_data(data, rec_size);
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
return;
}
if (fsm->remaining) { // more segments to download
fsm->toggle = !fsm->toggle;
ec_fsm_coe_down_prepare_segment_request(fsm);
} else {
fsm->state = ec_fsm_coe_end; // success
}
}
/*****************************************************************************/
/**
CoE state: UP START.
*/
void ec_fsm_coe_up_start(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_slave_t *slave = fsm->slave;
ec_master_t *master = slave->master;
ec_sdo_request_t *request = fsm->request;
uint8_t *data;
EC_SLAVE_DBG(slave, 1, "Uploading SDO 0x%04X:%02X.\n",
request->index, request->subindex);
if (!(slave->sii.mailbox_protocols & EC_MBOX_COE)) {
EC_SLAVE_ERR(slave, "Slave does not support CoE!\n");
request->errno = EPROTONOSUPPORT;
fsm->state = ec_fsm_coe_error;
return;
}
data = ec_slave_mbox_prepare_send(slave, mbox, 0x03, 10);
if (IS_ERR(data)) {
request->errno = PTR_ERR(data);
fsm->state = ec_fsm_coe_error;
return;
}
EC_WRITE_U16(data, 0x2 << 12); // SDO request
EC_WRITE_U8 (data + 2, 0x2 << 5); // initiate upload request
EC_WRITE_U16(data + 3, request->index);
EC_WRITE_U8 (data + 5, request->subindex);
memset(data + 6, 0x00, 4);
if (master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Upload request:\n");
ec_print_data(data, 10);
}
fsm->request->jiffies_sent = jiffies;
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_up_request;
}
/*****************************************************************************/
/**
CoE state: UP REQUEST.
\todo Timeout behavior
*/
void ec_fsm_coe_up_request(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
unsigned long diff_ms;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return; // FIXME: check for response first?
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE upload request: ");
ec_datagram_print_state(datagram);
return;
}
diff_ms = (jiffies - fsm->request->jiffies_sent) * 1000 / HZ;
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
if (ec_mbox_is_datagram_wc(mbox, 0)) {
if (diff_ms < fsm->request->response_timeout) {
#if DEBUG_RETRIES
EC_SLAVE_DBG(slave, 1, "Slave did not respond to"
" SDO upload request. Retrying after %lu ms...\n",
diff_ms);
#endif
// no response; send request datagram again
return;
}
}
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE upload request for"
" SDO 0x%04x:%x failed with timeout after %lu ms: ",
fsm->request->index, fsm->request->subindex, diff_ms);
ec_datagram_print_wc_error(datagram);
return;
}
#if DEBUG_LONG
if (diff_ms > 200) {
EC_SLAVE_WARN(slave, "SDO 0x%04x:%x upload took %lu ms.\n",
fsm->request->index, fsm->request->subindex, diff_ms);
}
#endif
fsm->jiffies_start = datagram->jiffies_sent;
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_up_check;
}
/*****************************************************************************/
/**
CoE state: UP CHECK.
*/
void ec_fsm_coe_up_check(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return;
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE mailbox check datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE mailbox check"
" datagram failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
if (!ec_slave_mbox_check(mbox)) {
unsigned long diff_ms =
(datagram->jiffies_received - fsm->jiffies_start) * 1000 / HZ;
if (diff_ms >= fsm->request->response_timeout) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Timeout after %lu ms while waiting for"
" SDO 0x%04x:%x upload response.\n", diff_ms,
fsm->request->index, fsm->request->subindex);
return;
}
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
return;
}
// Fetch response
ec_slave_mbox_prepare_fetch(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_up_response;
}
/*****************************************************************************/
/** Prepare an SDO upload segment request.
*/
void ec_fsm_coe_up_prepare_segment_request(
ec_fsm_coe_t *fsm /**< Finite state machine */
)
{
uint8_t *data =
ec_slave_mbox_prepare_send(fsm->slave, fsm->mbox, 0x03, 10);
if (IS_ERR(data)) {
fsm->request->errno = PTR_ERR(data);
fsm->state = ec_fsm_coe_error;
return;
}
EC_WRITE_U16(data, 0x2 << 12); // SDO request
EC_WRITE_U8 (data + 2, (fsm->toggle << 4 // toggle
| 0x3 << 5)); // upload segment request
memset(data + 3, 0x00, 7);
if (fsm->slave->master->debug_level) {
EC_SLAVE_DBG(fsm->slave, 1, "Upload segment request:\n");
ec_print_data(data, 10);
}
}
/*****************************************************************************/
/**
CoE state: UP RESPONSE.
\todo Timeout behavior
*/
void ec_fsm_coe_up_response(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
ec_master_t *master = slave->master;
uint16_t rec_index;
uint8_t *data, mbox_prot, rec_subindex;
size_t rec_size, data_size;
ec_sdo_request_t *request = fsm->request;
unsigned int expedited, size_specified;
int ret;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return; // FIXME: request again?
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE upload response"
" datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE upload response failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
data = ec_slave_mbox_fetch(slave, mbox, &mbox_prot, &rec_size);
if (IS_ERR(data)) {
request->errno = PTR_ERR(data);
fsm->state = ec_fsm_coe_error;
return;
}
if (master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Upload response:\n");
ec_print_data(data, rec_size);
}
if (mbox_prot != 0x03) { // CoE
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_WARN(slave, "Received mailbox protocol 0x%02X"
" as response.\n", mbox_prot);
return;
}
if (ec_fsm_coe_check_emergency(fsm, data, rec_size)) {
// check for CoE response again
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_up_check;
return;
}
if (rec_size < 6) {
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Received currupted SDO upload response"
" (%zu bytes)!\n", rec_size);
ec_print_data(data, rec_size);
return;
}
if (EC_READ_U16(data) >> 12 == 0x2 && // SDO request
EC_READ_U8(data + 2) >> 5 == 0x4) { // abort SDO transfer request
EC_SLAVE_ERR(slave, "SDO upload 0x%04X:%02X aborted.\n",
request->index, request->subindex);
if (rec_size >= 10) {
request->abort_code = EC_READ_U32(data + 6);
ec_canopen_abort_msg(slave, request->abort_code);
} else {
EC_SLAVE_ERR(slave, "No abort message.\n");
}
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
return;
}
if (EC_READ_U16(data) >> 12 != 0x3 || // SDO response
EC_READ_U8(data + 2) >> 5 != 0x2) { // upload response
EC_SLAVE_ERR(slave, "Received unknown response while"
" uploading SDO 0x%04X:%02X.\n",
request->index, request->subindex);
ec_print_data(data, rec_size);
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
return;
}
rec_index = EC_READ_U16(data + 3);
rec_subindex = EC_READ_U8(data + 5);
if (rec_index != request->index || rec_subindex != request->subindex) {
EC_SLAVE_ERR(slave, "Received upload response for wrong SDO"
" (0x%04X:%02X, requested: 0x%04X:%02X).\n",
rec_index, rec_subindex, request->index, request->subindex);
ec_print_data(data, rec_size);
// check for CoE response again
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_up_check;
return;
}
// normal or expedited?
expedited = EC_READ_U8(data + 2) & 0x02;
if (expedited) {
size_specified = EC_READ_U8(data + 2) & 0x01;
if (size_specified) {
fsm->complete_size = 4 - ((EC_READ_U8(data + 2) & 0x0C) >> 2);
} else {
fsm->complete_size = 4;
}
if (rec_size < 6 + fsm->complete_size) {
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Received corrupted SDO expedited upload"
" response (only %zu bytes)!\n", rec_size);
ec_print_data(data, rec_size);
return;
}
ret = ec_sdo_request_copy_data(request, data + 6, fsm->complete_size);
if (ret) {
request->errno = -ret;
fsm->state = ec_fsm_coe_error;
return;
}
} else { // normal
if (rec_size < 10) {
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Received currupted SDO normal upload"
" response (only %zu bytes)!\n", rec_size);
ec_print_data(data, rec_size);
return;
}
data_size = rec_size - 10;
fsm->complete_size = EC_READ_U32(data + 6);
if (!fsm->complete_size) {
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "No complete size supplied!\n");
ec_print_data(data, rec_size);
return;
}
ret = ec_sdo_request_alloc(request, fsm->complete_size);
if (ret) {
request->errno = -ret;
fsm->state = ec_fsm_coe_error;
return;
}
ret = ec_sdo_request_copy_data(request, data + 10, data_size);
if (ret) {
request->errno = -ret;
fsm->state = ec_fsm_coe_error;
return;
}
fsm->toggle = 0;
if (data_size < fsm->complete_size) {
EC_SLAVE_DBG(slave, 1, "SDO data incomplete (%zu / %u)."
" Segmenting...\n", data_size, fsm->complete_size);
ec_fsm_coe_up_prepare_segment_request(fsm);
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_up_seg_request;
return;
}
}
if (master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Uploaded data:\n");
ec_print_data(request->data, request->data_size);
}
fsm->state = ec_fsm_coe_end; // success
}
/*****************************************************************************/
/**
CoE state: UP REQUEST.
\todo Timeout behavior
*/
void ec_fsm_coe_up_seg_request(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return; // FIXME: check for response first?
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE upload segment"
" request datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE upload segment"
" request failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
fsm->jiffies_start = datagram->jiffies_sent;
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_up_seg_check;
}
/*****************************************************************************/
/**
CoE state: UP CHECK.
*/
void ec_fsm_coe_up_seg_check(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return;
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE mailbox check"
" datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE mailbox check datagram"
" failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
if (!ec_slave_mbox_check(mbox)) {
unsigned long diff_ms =
(datagram->jiffies_received - fsm->jiffies_start) * 1000 / HZ;
if (diff_ms >= fsm->request->response_timeout) {
fsm->request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Timeout while waiting for SDO upload"
" segment response.\n");
return;
}
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
return;
}
// Fetch response
ec_slave_mbox_prepare_fetch(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_up_seg_response;
}
/*****************************************************************************/
/**
CoE state: UP RESPONSE.
\todo Timeout behavior
*/
void ec_fsm_coe_up_seg_response(ec_fsm_coe_t *fsm /**< finite state machine */)
{
ec_mailbox_t *mbox = fsm->mbox;
ec_datagram_t *datagram = mbox->datagram;
ec_slave_t *slave = fsm->slave;
ec_master_t *master = slave->master;
uint8_t *data, mbox_prot;
size_t rec_size, data_size;
ec_sdo_request_t *request = fsm->request;
unsigned int last_segment;
if (ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_TIMED_OUT)
&& fsm->retries--) {
return; // FIXME: request again?
}
if (!ec_mbox_is_datagram_state(mbox, EC_DATAGRAM_RECEIVED)) {
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Failed to receive CoE upload segment"
" response datagram: ");
ec_datagram_print_state(datagram);
return;
}
if (!ec_mbox_is_datagram_wc(mbox, 1)) {
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
EC_SLAVE_ERR(slave, "Reception of CoE upload segment"
" response failed: ");
ec_datagram_print_wc_error(datagram);
return;
}
data = ec_slave_mbox_fetch(slave, mbox, &mbox_prot, &rec_size);
if (IS_ERR(data)) {
request->errno = PTR_ERR(data);
fsm->state = ec_fsm_coe_error;
return;
}
if (master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Upload segment response:\n");
ec_print_data(data, rec_size);
}
if (mbox_prot != 0x03) { // CoE
EC_SLAVE_ERR(slave, "Received mailbox protocol 0x%02X as response.\n",
mbox_prot);
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
return;
}
if (ec_fsm_coe_check_emergency(fsm, data, rec_size)) {
// check for CoE response again
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_up_seg_check;
return;
}
if (rec_size < 10) {
EC_SLAVE_ERR(slave, "Received currupted SDO upload"
" segment response!\n");
ec_print_data(data, rec_size);
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
return;
}
if (EC_READ_U16(data) >> 12 == 0x2 && // SDO request
EC_READ_U8 (data + 2) >> 5 == 0x4) { // abort SDO transfer request
EC_SLAVE_ERR(slave, "SDO upload 0x%04X:%02X aborted.\n",
request->index, request->subindex);
request->abort_code = EC_READ_U32(data + 6);
ec_canopen_abort_msg(slave, request->abort_code);
request->errno = EIO;
fsm->state = ec_fsm_coe_error;
return;
}
if (EC_READ_U16(data) >> 12 != 0x3 || // SDO response
EC_READ_U8 (data + 2) >> 5 != 0x0) { // upload segment response
if (fsm->slave->master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Invalid SDO upload segment response!\n");
ec_print_data(data, rec_size);
}
// check for CoE response again
ec_slave_mbox_prepare_check(slave, mbox); // can not fail.
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_up_seg_check;
return;
}
data_size = rec_size - 3; /* Header of segment upload is smaller than
normal upload */
if (rec_size == 10) {
uint8_t seg_size = (EC_READ_U8(data + 2) & 0xE) >> 1;
data_size -= seg_size;
}
if (request->data_size + data_size > fsm->complete_size) {
EC_SLAVE_ERR(slave, "SDO upload 0x%04X:%02X failed: Fragment"
" exceeding complete size!\n",
request->index, request->subindex);
request->errno = EOVERFLOW;
fsm->state = ec_fsm_coe_error;
return;
}
memcpy(request->data + request->data_size, data + 3, data_size);
request->data_size += data_size;
last_segment = EC_READ_U8(data + 2) & 0x01;
if (!last_segment) {
fsm->toggle = !fsm->toggle;
ec_fsm_coe_up_prepare_segment_request(fsm);
fsm->retries = EC_FSM_RETRIES;
fsm->state = ec_fsm_coe_up_seg_request;
return;
}
if (request->data_size != fsm->complete_size) {
EC_SLAVE_WARN(slave, "SDO upload 0x%04X:%02X: Assembled data"
" size (%zu) does not match complete size (%u)!\n",
request->index, request->subindex,
request->data_size, fsm->complete_size);
}
if (master->debug_level) {
EC_SLAVE_DBG(slave, 1, "Uploaded data:\n");
ec_print_data(request->data, request->data_size);
}
fsm->state = ec_fsm_coe_end; // success
}
/*****************************************************************************/
/**
State: ERROR.
*/
void ec_fsm_coe_error(ec_fsm_coe_t *fsm /**< finite state machine */)
{
}
/*****************************************************************************/
/**
State: END.
*/
void ec_fsm_coe_end(ec_fsm_coe_t *fsm /**< finite state machine */)
{
}
/*****************************************************************************/