forked from Imagelibrary/rtems
33f6e34b2d
This patch changes the license to BSD-2 for all source files where the copyright is held by Aeroflex Gaisler, Cobham Gaisler, or Gaisler Research. Some files also includes copyright right statements from OAR and/or embedded Brains in addition to Gaisler. Updates #3053.
247 lines
8.5 KiB
C
247 lines
8.5 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/* ADC / DAC (GRADCDAC) interface
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*
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* COPYRIGHT (c) 2009.
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* Cobham Gaisler AB.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __GRADCDAC_H__
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#define __GRADCDAC_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct gradcdac_regs {
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volatile unsigned int config; /* 0x00 Configuration Register */
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volatile unsigned int status; /* 0x04 Status Register */
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int unused0[2];
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volatile unsigned int adc_din; /* 0x10 ADC Data Input Register */
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volatile unsigned int dac_dout; /* 0x14 DAC Data Output Register */
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int unused1[2];
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volatile unsigned int adrin; /* 0x20 Address Input Register */
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volatile unsigned int adrout; /* 0x24 Address Output Register */
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volatile unsigned int adrdir; /* 0x28 Address Direction Register */
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int unused2[1];
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volatile unsigned int data_in; /* 0x30 Data Input Register */
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volatile unsigned int data_out; /* 0x34 Data Output Register */
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volatile unsigned int data_dir; /* 0x38 Data Direction Register */
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};
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#define GRADCDAC_CFG_DACWS 0x00f80000
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#define GRADCDAC_CFG_WRPOL 0x00040000
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#define GRADCDAC_CFG_DACDW 0x00030000
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#define GRADCDAC_CFG_ADCWS 0x0000f800
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#define GRADCDAC_CFG_RCPOL 0x00000400
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#define GRADCDAC_CFG_CSMODE 0x00000300
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#define GRADCDAC_CFG_CSPOL 0x00000080
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#define GRADCDAC_CFG_RDYMODE 0x00000040
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#define GRADCDAC_CFG_RDYPOL 0x00000020
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#define GRADCDAC_CFG_TRIGPOL 0x00000010
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#define GRADCDAC_CFG_TRIGMODE 0x0000000c
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#define GRADCDAC_CFG_ADCDW 0x00000003
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#define GRADCDAC_CFG_DACWS_BIT 19
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#define GRADCDAC_CFG_WRPOL_BIT 18
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#define GRADCDAC_CFG_DACDW_BIT 16
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#define GRADCDAC_CFG_ADCWS_BIT 11
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#define GRADCDAC_CFG_RCPOL_BIT 10
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#define GRADCDAC_CFG_CSMODE_BIT 8
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#define GRADCDAC_CFG_CSPOL_BIT 7
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#define GRADCDAC_CFG_RDYMODE_BIT 6
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#define GRADCDAC_CFG_RDYPOL_BIT 5
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#define GRADCDAC_CFG_TRIGPOL_BIT 4
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#define GRADCDAC_CFG_TRIGMODE_BIT 2
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#define GRADCDAC_CFG_ADCDW_BIT 0
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#define GRADCDAC_STATUS_DACNO 0x40
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#define GRADCDAC_STATUS_DACRDY 0x20
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#define GRADCDAC_STATUS_DACON 0x10
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#define GRADCDAC_STATUS_ADCTO 0x08
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#define GRADCDAC_STATUS_ADCNO 0x04
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#define GRADCDAC_STATUS_ADCRDY 0x02
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#define GRADCDAC_STATUS_ADCON 0x01
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#define GRADCDAC_STATUS_DACNO_BIT 6
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#define GRADCDAC_STATUS_DACRDY_BIT 5
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#define GRADCDAC_STATUS_DACON_BIT 4
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#define GRADCDAC_STATUS_ADCTO_BIT 3
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#define GRADCDAC_STATUS_ADCNO_BIT 2
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#define GRADCDAC_STATUS_ADCRDY_BIT 1
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#define GRADCDAC_STATUS_ADCON_BIT 0
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#define GRADCDAC_IRQ_DAC 1
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#define GRADCDAC_IRQ_ADC 0
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struct gradcdac_config {
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unsigned char dac_ws;
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char wr_pol;
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unsigned char dac_dw;
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unsigned char adc_ws;
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char rc_pol;
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unsigned char cs_mode;
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char cs_pol;
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char ready_mode;
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char ready_pol;
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char trigg_pol;
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unsigned char trigg_mode;
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unsigned char adc_dw;
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};
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extern void *gradcdac_open(char *devname);
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extern void gradcdac_set_config(void *cookie, struct gradcdac_config *cfg);
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extern void gradcdac_get_config(void *cookie, struct gradcdac_config *cfg);
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extern void gradcdac_set_cfg(void *cookie, unsigned int config);
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extern unsigned int gradcdac_get_cfg(void *cookie);
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extern unsigned int gradcdac_get_status(void *cookie);
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static int __inline__ gradcdac_DAC_ReqRej(unsigned int status)
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{
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return (status & GRADCDAC_STATUS_DACNO);
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}
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static int __inline__ gradcdac_DAC_isCompleted(unsigned int status)
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{
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return (status & GRADCDAC_STATUS_DACRDY);
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}
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static int __inline__ gradcdac_DAC_isOngoing(unsigned int status)
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{
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return (status & GRADCDAC_STATUS_DACON);
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}
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static int __inline__ gradcdac_ADC_isTimeouted(unsigned int status)
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{
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return (status & GRADCDAC_STATUS_ADCTO);
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}
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static int __inline__ gradcdac_ADC_ReqRej(unsigned int status)
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{
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return (status & GRADCDAC_STATUS_ADCNO);
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}
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static int __inline__ gradcdac_ADC_isCompleted(unsigned int status)
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{
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return (status & GRADCDAC_STATUS_ADCRDY);
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}
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static int __inline__ gradcdac_ADC_isOngoing(unsigned int status)
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{
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return (status & GRADCDAC_STATUS_ADCON);
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}
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#define GRADCDAC_ISR_BOTH 3
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#define GRADCDAC_ISR_DAC 2
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#define GRADCDAC_ISR_ADC 1
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/* Install IRQ handler for ADC and/or DAC interrupt.
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* The installed IRQ handler(ISR) must read the status
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* register to clear the pending interrupt avoiding multiple
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* entries to the ISR caused by the same IRQ.
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*
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* \param adc 1=ADC interrupt, 2=ADC interrupt, 3=ADC and DAC interrupt
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* \param isr Interrupt service routine called when IRQ is fired
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* \param arg custom argument passed to ISR when called.
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*/
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extern int gradcdac_install_irq_handler
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(void *cookie, int adc, void (*isr)(void *cookie, void *arg), void *arg);
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extern void gradcdac_uninstall_irq_handler(void *cookie, int adc);
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/* Make the ADC circuitry initialize a analogue to digital
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* conversion. The result can be read out by gradcdac_adc_convert_try
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* or gradcdac_adc_convert.
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*/
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extern void gradcdac_adc_convert_start(void *cookie);
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/* Tries to read the conversion result. If the circuitry is busy
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* converting the function return a non-zero value, if the conversion
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* has successfully finished the function return zero.
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*
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* \param digital_value the resulting converted value is placed here
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* \return zero = ADC conversion complete, digital_value contain current conversion result
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* positive = ADC busy, digital_value contain previous conversion result
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* negative = Conversion request failed.
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*/
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extern int gradcdac_adc_convert_try(void *cookie, unsigned short *digital_value);
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/* Waits until the ADC circuity has finished a digital to analogue
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* conversion. The Waiting is implemented as a busy loop utilizing
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* 100% CPU load.
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*
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* \return zero = Conversion ok
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* negative = Conversion request failed.
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*/
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extern int gradcdac_adc_convert(void *cookie, unsigned short *digital_value);
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/* Try to make the DAC circuitry initialize a digital to analogue
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* conversion. If the circuitry is busy by a previous conversion
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* the function return a non-zero value, if the conversion is
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* successfully initialized the function return zero.
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*/
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extern int gradcdac_dac_convert_try(void *cookie, unsigned short digital_value);
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/* Initializes a digital to analogue conversion by waiting until
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* previous conversions is finished before procceding with the
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* conversion. The Waiting is implemented as a busy loop utilizing
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* 100% CPU load.
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*/
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extern void gradcdac_dac_convert(void *cookie, unsigned short digital_value);
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extern unsigned int gradcdac_get_adrinput(void *cookie);
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extern void gradcdac_set_adrinput(void *cookie, unsigned int input);
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extern unsigned int gradcdac_get_adroutput(void *cookie);
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extern void gradcdac_set_adroutput(void *cookie, unsigned int output);
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extern unsigned int gradcdac_get_adrdir(void *cookie);
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extern void gradcdac_set_adrdir(void *cookie, unsigned int dir);
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extern unsigned int gradcdac_get_datainput(void *cookie);
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extern void gradcdac_set_datainput(void *cookie, unsigned int input);
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extern unsigned int gradcdac_get_dataoutput(void *cookie);
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extern void gradcdac_set_dataoutput(void *cookie, unsigned int output);
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extern unsigned int gradcdac_get_datadir(void *cookie);
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extern void gradcdac_set_datadir(void *cookie, unsigned int dir);
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/* Show one or all GRADCDAC cores. If cookie is NULL all GRADCDAC's are shown */
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extern void grAdcDacShow(void *cookie);
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/* Register Driver routine */
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extern void gradcdac_register_drv (void);
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#ifdef __cplusplus
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}
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#endif
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#endif
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