/******************************************************************************
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/******************************************************************************
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* *
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* *
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* Minimalistic 1-wire (onewire) master with Avalon MM bus interface *
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* Copyright (C) 2010 Iztok Jeras *
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* Since the code is based on an Altera app note, I kept their license. *
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* *
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* License Agreement *
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* License Agreement *
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* *
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* *
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* Copyright (c) 2008 Altera Corporation, San Jose, California, USA. *
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* Copyright (c) 2008 Altera Corporation, San Jose, California, USA. *
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* All rights reserved. *
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* All rights reserved. *
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* *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the "Software"), *
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* copy of this software and associated documentation files (the "Software"), *
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* to deal in the Software without restriction, including without limitation *
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* to deal in the Software without restriction, including without limitation *
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
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* and/or sell copies of the Software, and to permit persons to whom the *
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* and/or sell copies of the Software, and to permit persons to whom the *
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* Software is furnished to do so, subject to the following conditions: *
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* Software is furnished to do so, subject to the following conditions: *
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* *
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* *
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* The above copyright notice and this permission notice shall be included in *
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* The above copyright notice and this permission notice shall be included in *
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* all copies or substantial portions of the Software. *
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* all copies or substantial portions of the Software. *
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* *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
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* DEALINGS IN THE SOFTWARE. *
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* DEALINGS IN THE SOFTWARE. *
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* *
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* *
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* This agreement shall be governed in all respects by the laws of the State *
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* This agreement shall be governed in all respects by the laws of the State *
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* of California and by the laws of the United States of America. *
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* of California and by the laws of the United States of America. *
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* *
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* *
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******************************************************************************/
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******************************************************************************/
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//////////////////////////////////////////////////////////////////////////////
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// //
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// Minimalistic 1-wire (onewire) master with Avalon MM bus interface //
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// //
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// Copyright (C) 2010 Iztok Jeras //
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// //
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//////////////////////////////////////////////////////////////////////////////
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// //
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// This program is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU Lesser General Public License //
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// as published by the Free Software Foundation, either //
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// version 3 of the License, or (at your option) any later version. //
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// //
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// This program 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 //
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// GNU General 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 //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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// //
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//////////////////////////////////////////////////////////////////////////////
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#include <fcntl.h>
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#include <fcntl.h>
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#include "sys/alt_dev.h"
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#include "sys/alt_dev.h"
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#include "sys/alt_irq.h"
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#include "sys/alt_irq.h"
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#include "sys/ioctl.h"
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#include "sys/ioctl.h"
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#include "sys/alt_errno.h"
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#include "sys/alt_errno.h"
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#include "sockit_owm_regs.h"
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#include "sockit_owm_regs.h"
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#include "sockit_owm.h"
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#include "sockit_owm.h"
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extern sockit_owm_state sockit_owm;
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extern sockit_owm_state sockit_owm;
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#ifndef SOCKIT_OWM_POLLING
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#ifndef SOCKIT_OWM_POLLING
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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// interrupt implementation
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// interrupt implementation
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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#ifdef ALT_ENHANCED_INTERRUPT_API_PRESENT
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#ifdef ALT_ENHANCED_INTERRUPT_API_PRESENT
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static void sockit_owm_irq ();
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static void sockit_owm_irq ();
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#else
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#else
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static void sockit_owm_irq (alt_u32 id);
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static void sockit_owm_irq (alt_u32 id);
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#endif
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#endif
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void sockit_owm_init (alt_u32 irq)
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void sockit_owm_init (alt_u32 irq)
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{
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{
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int error;
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int error;
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// initialize semaphore for transfer locking
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// initialize semaphore for 1-wire cycle locking
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// TODO there is a warning to fix here
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error = ALT_FLAG_CREATE (sockit_owm.irq, 0) ||
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error = ALT_FLAG_CREATE (sockit_owm.irq, 0) ||
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ALT_SEM_CREATE (sockit_owm.trn, 1);
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ALT_SEM_CREATE (sockit_owm.cyc, 1);
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if (!error) {
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if (!error) {
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// enable TX interrupt, RX is unused
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// enable interrupt
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sockit_owm.ena = 0x1;
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sockit_owm.ien = 0x1;
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// register the interrupt handler
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// register the interrupt handler
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#ifdef ALT_ENHANCED_INTERRUPT_API_PRESENT
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#ifdef ALT_ENHANCED_INTERRUPT_API_PRESENT
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alt_ic_isr_register (0, irq, sockit_owm_irq, NULL, 0x0);
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alt_ic_isr_register (0, irq, sockit_owm_irq, NULL, 0x0);
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#else
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#else
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alt_irq_register (irq, NULL, sockit_owm_irq);
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alt_irq_register (irq, NULL, sockit_owm_irq);
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#endif
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#endif
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}
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}
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}
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}
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#ifdef ALT_ENHANCED_INTERRUPT_API_PRESENT
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#ifdef ALT_ENHANCED_INTERRUPT_API_PRESENT
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static void sockit_owm_irq(void * state)
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static void sockit_owm_irq(void * state)
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#else
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#else
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static void sockit_owm_irq(void * state, alt_u32 id)
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static void sockit_owm_irq(void * state, alt_u32 id)
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#endif
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#endif
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{
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{
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// clear onewire interrupts
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// clear onewire interrupts
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IORD_SOCKIT_OWM (sockit_owm.base);
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IORD_SOCKIT_OWM (sockit_owm.base);
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// set the flag indicating a completed transfer
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// set the flag indicating a completed 1-wire cycle
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ALT_FLAG_POST (sockit_owm.irq, 0x1, OS_FLAG_SET);
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ALT_FLAG_POST (sockit_owm.irq, 0x1, OS_FLAG_SET);
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}
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}
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#else
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#else
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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// polling implementation
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// polling implementation
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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#endif
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#endif
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