author | Florian Pose <fp@igh-essen.com> |
Thu, 06 Dec 2012 13:54:09 +0100 | |
branch | stable-1.5 |
changeset 2480 | 8b1e26cc88ac |
parent 2443 | 2c3ccdde3919 |
child 2521 | 3d68bb0047a1 |
permissions | -rw-r--r-- |
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/****************************************************************************** |
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* |
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* $Id$ |
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* |
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* Copyright (C) 2012 Florian Pose, Ingenieurgemeinschaft IgH |
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* |
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* This file is part of the IgH EtherCAT Master. |
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* |
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* The IgH EtherCAT Master is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License version 2, as |
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* published by the Free Software Foundation. |
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* |
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* The IgH EtherCAT Master is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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* Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with the IgH EtherCAT Master; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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* |
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* --- |
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* |
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* The license mentioned above concerns the source code only. Using the |
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* EtherCAT technology and brand is only permitted in compliance with the |
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* industrial property and similar rights of Beckhoff Automation GmbH. |
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* |
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*****************************************************************************/ |
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|
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/** \file |
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* Register request functions. |
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*/ |
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/*****************************************************************************/ |
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#include <linux/module.h> |
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#include <linux/jiffies.h> |
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#include <linux/slab.h> |
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#include "reg_request.h" |
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/*****************************************************************************/ |
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void ec_reg_request_clear_data(ec_reg_request_t *); |
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/*****************************************************************************/ |
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/** Register request constructor. |
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*/ |
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int ec_reg_request_init( |
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ec_reg_request_t *reg, /**< Register request. */ |
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size_t size /**< Memory size. */ |
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) |
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{ |
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if (!(reg->data = (uint8_t *) kmalloc(size, GFP_KERNEL))) { |
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EC_ERR("Failed to allocate %zu bytes of register memory.\n", size); |
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return -ENOMEM; |
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} |
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INIT_LIST_HEAD(®->list); |
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reg->mem_size = size; |
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memset(reg->data, 0x00, size); |
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reg->dir = EC_DIR_INVALID; |
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reg->address = 0; |
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reg->transfer_size = 0; |
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reg->state = EC_INT_REQUEST_INIT; |
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return 0; |
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} |
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/*****************************************************************************/ |
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/** Register request destructor. |
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*/ |
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void ec_reg_request_clear( |
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ec_reg_request_t *reg /**< Register request. */ |
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) |
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{ |
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if (reg->data) { |
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kfree(reg->data); |
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} |
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} |
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|
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/***************************************************************************** |
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* Application interface. |
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****************************************************************************/ |
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uint8_t *ecrt_reg_request_data(ec_reg_request_t *reg) |
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{ |
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return reg->data; |
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} |
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/*****************************************************************************/ |
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ec_request_state_t ecrt_reg_request_state(const ec_reg_request_t *reg) |
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{ |
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return ec_request_state_translation_table[reg->state]; |
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} |
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|
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/*****************************************************************************/ |
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void ecrt_reg_request_write(ec_reg_request_t *reg, uint16_t address, |
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size_t size) |
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{ |
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reg->dir = EC_DIR_OUTPUT; |
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reg->address = address; |
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reg->transfer_size = min(size, reg->mem_size); |
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reg->state = EC_INT_REQUEST_QUEUED; |
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} |
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|
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/*****************************************************************************/ |
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void ecrt_reg_request_read(ec_reg_request_t *reg, uint16_t address, |
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size_t size) |
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{ |
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reg->dir = EC_DIR_INPUT; |
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reg->address = address; |
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parents:
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117 |
reg->transfer_size = min(size, reg->mem_size); |
2c3ccdde3919
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parents:
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118 |
reg->state = EC_INT_REQUEST_QUEUED; |
2c3ccdde3919
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119 |
} |
2c3ccdde3919
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120 |
|
2c3ccdde3919
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121 |
/*****************************************************************************/ |
2c3ccdde3919
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122 |
|
2c3ccdde3919
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123 |
/** \cond */ |
2c3ccdde3919
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124 |
|
2c3ccdde3919
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125 |
EXPORT_SYMBOL(ecrt_reg_request_data); |
2c3ccdde3919
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parents:
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126 |
EXPORT_SYMBOL(ecrt_reg_request_state); |
2c3ccdde3919
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127 |
EXPORT_SYMBOL(ecrt_reg_request_write); |
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128 |
EXPORT_SYMBOL(ecrt_reg_request_read); |
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129 |
|
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130 |
/** \endcond */ |
2c3ccdde3919
Added interface to read/write register contents; re-worked register requests.
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parents:
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131 |
|
2c3ccdde3919
Added interface to read/write register contents; re-worked register requests.
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132 |
/*****************************************************************************/ |