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WSL2-Linux-Kernel/include/linux/comedi/comedi_8254.h

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staging: comedi: drivers: Cleanup malformed licence identifier This patch fixes multiple occurences of the checkpatch.pl warning: WARNING: Missing or malformed SPDX-License-Identifier tag in line 1 NB. This is an additional patch and does not overlap the patch sent yesterday for 8255.h. Should have sent them all together. Newb mistake. Cc: Ian Abbott <abbotti@mev.co.uk> Cc: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Stephen Davies <davo2002@tpg.com.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-29 04:49:18 +03:00
/* SPDX-License-Identifier: GPL-2.0+ */
staging: comedi: comedi_8254: introduce module for 8254 timer support A 8254 timer/counter is commonly used on data acquisition boards to provide the internal pacer clock used to acquire analog input samples. Some boards also to allow the timers to be used externally. Currently the 8254 timers are supported by comedi using the 8253.h header and a number of inline functions. This works for the internal pacer clock but requires the drivers to implement subdevice code necessary to use the timers externally. Introduce a new module to support both the internal pacer clock and the external counter subdevice. This will allow removing a bunch of duplicated code in the drivers and standardizes the comedi 8254 timer support. This implementation is based on the 8253.h inline functions and the various subdevice functionality in the comedi drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 00:57:28 +03:00
/*
* comedi_8254.h
* Generic 8254 timer/counter support
* Copyright (C) 2014 H Hartley Sweeten <hsweeten@visionengravers.com>
*
* COMEDI - Linux Control and Measurement Device Interface
* Copyright (C) 2000 David A. Schleef <ds@schleef.org>
*/
#ifndef _COMEDI_8254_H
#define _COMEDI_8254_H
staging: comedi: comedi_8254.h: make self-reliant The Comedi "comedi_8254.h" header file is included by various Comedi drivers with timer/counters based on the 8254 chip. The drivers do not compile cleanly if this header file is included first. It uses pointers to the `struct comedi_device`, `struct comedi_subdevice`, and `struct comedi_insn` structures in various function prototypes, so declare those as incomplete types. It use the `bool` type, so include <linux/types.h>. It also uses the `__iomem` tag, but that seems to be taken care of indirectly by including <linux/types.h>. Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-05-22 20:32:31 +03:00
#include <linux/types.h>
struct comedi_device;
struct comedi_insn;
struct comedi_subdevice;
staging: comedi: comedi_8254: introduce module for 8254 timer support A 8254 timer/counter is commonly used on data acquisition boards to provide the internal pacer clock used to acquire analog input samples. Some boards also to allow the timers to be used externally. Currently the 8254 timers are supported by comedi using the 8253.h header and a number of inline functions. This works for the internal pacer clock but requires the drivers to implement subdevice code necessary to use the timers externally. Introduce a new module to support both the internal pacer clock and the external counter subdevice. This will allow removing a bunch of duplicated code in the drivers and standardizes the comedi 8254 timer support. This implementation is based on the 8253.h inline functions and the various subdevice functionality in the comedi drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 00:57:28 +03:00
/*
* Common oscillator base values in nanoseconds
*/
#define I8254_OSC_BASE_10MHZ 100
#define I8254_OSC_BASE_5MHZ 200
#define I8254_OSC_BASE_4MHZ 250
#define I8254_OSC_BASE_2MHZ 500
#define I8254_OSC_BASE_1MHZ 1000
#define I8254_OSC_BASE_100KHZ 10000
#define I8254_OSC_BASE_10KHZ 100000
#define I8254_OSC_BASE_1KHZ 1000000
/*
* I/O access size used to read/write registers
*/
#define I8254_IO8 1
#define I8254_IO16 2
#define I8254_IO32 4
/*
* Register map for generic 8254 timer (I8254_IO8 with 0 regshift)
*/
#define I8254_COUNTER0_REG 0x00
#define I8254_COUNTER1_REG 0x01
#define I8254_COUNTER2_REG 0x02
#define I8254_CTRL_REG 0x03
#define I8254_CTRL_SEL_CTR(x) ((x) << 6)
staging: comedi: comedi_8254.h: tidy up the register map defines Tidy up the defines to fix the checkpatch.pl issues: CHECK: Prefer using the BIT macro Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-04-11 21:32:18 +03:00
#define I8254_CTRL_READBACK(x) (I8254_CTRL_SEL_CTR(3) | BIT(x))
#define I8254_CTRL_READBACK_COUNT I8254_CTRL_READBACK(4)
#define I8254_CTRL_READBACK_STATUS I8254_CTRL_READBACK(5)
staging: comedi: comedi_8254: introduce module for 8254 timer support A 8254 timer/counter is commonly used on data acquisition boards to provide the internal pacer clock used to acquire analog input samples. Some boards also to allow the timers to be used externally. Currently the 8254 timers are supported by comedi using the 8253.h header and a number of inline functions. This works for the internal pacer clock but requires the drivers to implement subdevice code necessary to use the timers externally. Introduce a new module to support both the internal pacer clock and the external counter subdevice. This will allow removing a bunch of duplicated code in the drivers and standardizes the comedi 8254 timer support. This implementation is based on the 8253.h inline functions and the various subdevice functionality in the comedi drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 00:57:28 +03:00
#define I8254_CTRL_READBACK_SEL_CTR(x) (2 << (x))
staging: comedi: comedi_8254.h: tidy up the register map defines Tidy up the defines to fix the checkpatch.pl issues: CHECK: Prefer using the BIT macro Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-04-11 21:32:18 +03:00
#define I8254_CTRL_RW(x) (((x) & 0x3) << 4)
#define I8254_CTRL_LATCH I8254_CTRL_RW(0)
#define I8254_CTRL_LSB_ONLY I8254_CTRL_RW(1)
#define I8254_CTRL_MSB_ONLY I8254_CTRL_RW(2)
#define I8254_CTRL_LSB_MSB I8254_CTRL_RW(3)
staging: comedi: comedi_8254: introduce module for 8254 timer support A 8254 timer/counter is commonly used on data acquisition boards to provide the internal pacer clock used to acquire analog input samples. Some boards also to allow the timers to be used externally. Currently the 8254 timers are supported by comedi using the 8253.h header and a number of inline functions. This works for the internal pacer clock but requires the drivers to implement subdevice code necessary to use the timers externally. Introduce a new module to support both the internal pacer clock and the external counter subdevice. This will allow removing a bunch of duplicated code in the drivers and standardizes the comedi 8254 timer support. This implementation is based on the 8253.h inline functions and the various subdevice functionality in the comedi drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 00:57:28 +03:00
/* counter maps zero to 0x10000 */
#define I8254_MAX_COUNT 0x10000
/**
* struct comedi_8254 - private data used by this module
* @iobase: PIO base address of the registers (in/out)
* @mmio: MMIO base address of the registers (read/write)
* @iosize: I/O size used to access the registers (b/w/l)
* @regshift: register gap shift
* @osc_base: cascaded oscillator speed in ns
* @divisor: divisor for single counter
* @divisor1: divisor loaded into first cascaded counter
* @divisor2: divisor loaded into second cascaded counter
* #next_div: next divisor for single counter
* @next_div1: next divisor to use for first cascaded counter
* @next_div2: next divisor to use for second cascaded counter
staging: comedi: amplc_dio200_common: convert driver to use the comedi_8254 module Convert this driver to use the comedi_8254 module to provide the 8254 timer support. Add 'clock_src' and 'gate_src' members to the comedi_8254 data for convienence. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 20:38:49 +03:00
* @clock_src; current clock source for each counter (driver specific)
* @gate_src; current gate source for each counter (driver specific)
staging: comedi: comedi_8254: introduce module for 8254 timer support A 8254 timer/counter is commonly used on data acquisition boards to provide the internal pacer clock used to acquire analog input samples. Some boards also to allow the timers to be used externally. Currently the 8254 timers are supported by comedi using the 8253.h header and a number of inline functions. This works for the internal pacer clock but requires the drivers to implement subdevice code necessary to use the timers externally. Introduce a new module to support both the internal pacer clock and the external counter subdevice. This will allow removing a bunch of duplicated code in the drivers and standardizes the comedi 8254 timer support. This implementation is based on the 8253.h inline functions and the various subdevice functionality in the comedi drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 00:57:28 +03:00
* @busy: flags used to indicate that a counter is "busy"
* @insn_config: driver specific (*insn_config) callback
*/
struct comedi_8254 {
unsigned long iobase;
void __iomem *mmio;
unsigned int iosize;
unsigned int regshift;
unsigned int osc_base;
unsigned int divisor;
unsigned int divisor1;
unsigned int divisor2;
unsigned int next_div;
unsigned int next_div1;
unsigned int next_div2;
staging: comedi: amplc_dio200_common: convert driver to use the comedi_8254 module Convert this driver to use the comedi_8254 module to provide the 8254 timer support. Add 'clock_src' and 'gate_src' members to the comedi_8254 data for convienence. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 20:38:49 +03:00
unsigned int clock_src[3];
unsigned int gate_src[3];
staging: comedi: comedi_8254: introduce module for 8254 timer support A 8254 timer/counter is commonly used on data acquisition boards to provide the internal pacer clock used to acquire analog input samples. Some boards also to allow the timers to be used externally. Currently the 8254 timers are supported by comedi using the 8253.h header and a number of inline functions. This works for the internal pacer clock but requires the drivers to implement subdevice code necessary to use the timers externally. Introduce a new module to support both the internal pacer clock and the external counter subdevice. This will allow removing a bunch of duplicated code in the drivers and standardizes the comedi 8254 timer support. This implementation is based on the 8253.h inline functions and the various subdevice functionality in the comedi drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 00:57:28 +03:00
bool busy[3];
staging: comedi: comedi_8254.h: add identifiers to function parameters Fix checkpatch.pl warnings of the form "function definition argument 'foo' should also have an identifier name". Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-15 16:19:41 +03:00
int (*insn_config)(struct comedi_device *dev,
struct comedi_subdevice *s,
struct comedi_insn *insn, unsigned int *data);
staging: comedi: comedi_8254: introduce module for 8254 timer support A 8254 timer/counter is commonly used on data acquisition boards to provide the internal pacer clock used to acquire analog input samples. Some boards also to allow the timers to be used externally. Currently the 8254 timers are supported by comedi using the 8253.h header and a number of inline functions. This works for the internal pacer clock but requires the drivers to implement subdevice code necessary to use the timers externally. Introduce a new module to support both the internal pacer clock and the external counter subdevice. This will allow removing a bunch of duplicated code in the drivers and standardizes the comedi 8254 timer support. This implementation is based on the 8253.h inline functions and the various subdevice functionality in the comedi drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 00:57:28 +03:00
};
staging: comedi: comedi_8254.h: add identifiers to function parameters Fix checkpatch.pl warnings of the form "function definition argument 'foo' should also have an identifier name". Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-15 16:19:41 +03:00
unsigned int comedi_8254_status(struct comedi_8254 *i8254,
unsigned int counter);
unsigned int comedi_8254_read(struct comedi_8254 *i8254, unsigned int counter);
void comedi_8254_write(struct comedi_8254 *i8254,
staging: comedi: comedi_8254: introduce module for 8254 timer support A 8254 timer/counter is commonly used on data acquisition boards to provide the internal pacer clock used to acquire analog input samples. Some boards also to allow the timers to be used externally. Currently the 8254 timers are supported by comedi using the 8253.h header and a number of inline functions. This works for the internal pacer clock but requires the drivers to implement subdevice code necessary to use the timers externally. Introduce a new module to support both the internal pacer clock and the external counter subdevice. This will allow removing a bunch of duplicated code in the drivers and standardizes the comedi 8254 timer support. This implementation is based on the 8253.h inline functions and the various subdevice functionality in the comedi drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 00:57:28 +03:00
unsigned int counter, unsigned int val);
staging: comedi: comedi_8254.h: add identifiers to function parameters Fix checkpatch.pl warnings of the form "function definition argument 'foo' should also have an identifier name". Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-15 16:19:41 +03:00
int comedi_8254_set_mode(struct comedi_8254 *i8254,
staging: comedi: comedi_8254: introduce module for 8254 timer support A 8254 timer/counter is commonly used on data acquisition boards to provide the internal pacer clock used to acquire analog input samples. Some boards also to allow the timers to be used externally. Currently the 8254 timers are supported by comedi using the 8253.h header and a number of inline functions. This works for the internal pacer clock but requires the drivers to implement subdevice code necessary to use the timers externally. Introduce a new module to support both the internal pacer clock and the external counter subdevice. This will allow removing a bunch of duplicated code in the drivers and standardizes the comedi 8254 timer support. This implementation is based on the 8253.h inline functions and the various subdevice functionality in the comedi drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 00:57:28 +03:00
unsigned int counter, unsigned int mode);
staging: comedi: comedi_8254.h: add identifiers to function parameters Fix checkpatch.pl warnings of the form "function definition argument 'foo' should also have an identifier name". Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-15 16:19:41 +03:00
int comedi_8254_load(struct comedi_8254 *i8254,
staging: comedi: comedi_8254: introduce module for 8254 timer support A 8254 timer/counter is commonly used on data acquisition boards to provide the internal pacer clock used to acquire analog input samples. Some boards also to allow the timers to be used externally. Currently the 8254 timers are supported by comedi using the 8253.h header and a number of inline functions. This works for the internal pacer clock but requires the drivers to implement subdevice code necessary to use the timers externally. Introduce a new module to support both the internal pacer clock and the external counter subdevice. This will allow removing a bunch of duplicated code in the drivers and standardizes the comedi 8254 timer support. This implementation is based on the 8253.h inline functions and the various subdevice functionality in the comedi drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 00:57:28 +03:00
unsigned int counter, unsigned int val, unsigned int mode);
staging: comedi: comedi_8254.h: add identifiers to function parameters Fix checkpatch.pl warnings of the form "function definition argument 'foo' should also have an identifier name". Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-15 16:19:41 +03:00
void comedi_8254_pacer_enable(struct comedi_8254 *i8254,
staging: comedi: comedi_8254: introduce module for 8254 timer support A 8254 timer/counter is commonly used on data acquisition boards to provide the internal pacer clock used to acquire analog input samples. Some boards also to allow the timers to be used externally. Currently the 8254 timers are supported by comedi using the 8253.h header and a number of inline functions. This works for the internal pacer clock but requires the drivers to implement subdevice code necessary to use the timers externally. Introduce a new module to support both the internal pacer clock and the external counter subdevice. This will allow removing a bunch of duplicated code in the drivers and standardizes the comedi 8254 timer support. This implementation is based on the 8253.h inline functions and the various subdevice functionality in the comedi drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 00:57:28 +03:00
unsigned int counter1, unsigned int counter2,
bool enable);
staging: comedi: comedi_8254.h: add identifiers to function parameters Fix checkpatch.pl warnings of the form "function definition argument 'foo' should also have an identifier name". Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-15 16:19:41 +03:00
void comedi_8254_update_divisors(struct comedi_8254 *i8254);
void comedi_8254_cascade_ns_to_timer(struct comedi_8254 *i8254,
staging: comedi: comedi_8254: introduce module for 8254 timer support A 8254 timer/counter is commonly used on data acquisition boards to provide the internal pacer clock used to acquire analog input samples. Some boards also to allow the timers to be used externally. Currently the 8254 timers are supported by comedi using the 8253.h header and a number of inline functions. This works for the internal pacer clock but requires the drivers to implement subdevice code necessary to use the timers externally. Introduce a new module to support both the internal pacer clock and the external counter subdevice. This will allow removing a bunch of duplicated code in the drivers and standardizes the comedi 8254 timer support. This implementation is based on the 8253.h inline functions and the various subdevice functionality in the comedi drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 00:57:28 +03:00
unsigned int *nanosec, unsigned int flags);
staging: comedi: comedi_8254.h: add identifiers to function parameters Fix checkpatch.pl warnings of the form "function definition argument 'foo' should also have an identifier name". Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-15 16:19:41 +03:00
void comedi_8254_ns_to_timer(struct comedi_8254 *i8254,
staging: comedi: comedi_8254: introduce module for 8254 timer support A 8254 timer/counter is commonly used on data acquisition boards to provide the internal pacer clock used to acquire analog input samples. Some boards also to allow the timers to be used externally. Currently the 8254 timers are supported by comedi using the 8253.h header and a number of inline functions. This works for the internal pacer clock but requires the drivers to implement subdevice code necessary to use the timers externally. Introduce a new module to support both the internal pacer clock and the external counter subdevice. This will allow removing a bunch of duplicated code in the drivers and standardizes the comedi 8254 timer support. This implementation is based on the 8253.h inline functions and the various subdevice functionality in the comedi drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 00:57:28 +03:00
unsigned int *nanosec, unsigned int flags);
staging: comedi: comedi_8254.h: add identifiers to function parameters Fix checkpatch.pl warnings of the form "function definition argument 'foo' should also have an identifier name". Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-15 16:19:41 +03:00
void comedi_8254_set_busy(struct comedi_8254 *i8254,
staging: comedi: comedi_8254: introduce module for 8254 timer support A 8254 timer/counter is commonly used on data acquisition boards to provide the internal pacer clock used to acquire analog input samples. Some boards also to allow the timers to be used externally. Currently the 8254 timers are supported by comedi using the 8253.h header and a number of inline functions. This works for the internal pacer clock but requires the drivers to implement subdevice code necessary to use the timers externally. Introduce a new module to support both the internal pacer clock and the external counter subdevice. This will allow removing a bunch of duplicated code in the drivers and standardizes the comedi 8254 timer support. This implementation is based on the 8253.h inline functions and the various subdevice functionality in the comedi drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 00:57:28 +03:00
unsigned int counter, bool busy);
staging: comedi: comedi_8254.h: add identifiers to function parameters Fix checkpatch.pl warnings of the form "function definition argument 'foo' should also have an identifier name". Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-15 16:19:41 +03:00
void comedi_8254_subdevice_init(struct comedi_subdevice *s,
struct comedi_8254 *i8254);
staging: comedi: comedi_8254: introduce module for 8254 timer support A 8254 timer/counter is commonly used on data acquisition boards to provide the internal pacer clock used to acquire analog input samples. Some boards also to allow the timers to be used externally. Currently the 8254 timers are supported by comedi using the 8253.h header and a number of inline functions. This works for the internal pacer clock but requires the drivers to implement subdevice code necessary to use the timers externally. Introduce a new module to support both the internal pacer clock and the external counter subdevice. This will allow removing a bunch of duplicated code in the drivers and standardizes the comedi 8254 timer support. This implementation is based on the 8253.h inline functions and the various subdevice functionality in the comedi drivers. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-02-24 00:57:28 +03:00
struct comedi_8254 *comedi_8254_init(unsigned long iobase,
unsigned int osc_base,
unsigned int iosize,
unsigned int regshift);
struct comedi_8254 *comedi_8254_mm_init(void __iomem *mmio,
unsigned int osc_base,
unsigned int iosize,
unsigned int regshift);
#endif /* _COMEDI_8254_H */