diff options
Diffstat (limited to 'drivers/comedi/drivers/comedi_8254.h')
| -rw-r--r-- | drivers/comedi/drivers/comedi_8254.h | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/drivers/comedi/drivers/comedi_8254.h b/drivers/comedi/drivers/comedi_8254.h deleted file mode 100644 index d8264417e53c..000000000000 --- a/drivers/comedi/drivers/comedi_8254.h +++ /dev/null @@ -1,134 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0+ */ -/* - * 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 - -#include <linux/types.h> - -struct comedi_device; -struct comedi_insn; -struct comedi_subdevice; - -/* - * 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) -#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) -#define I8254_CTRL_READBACK_SEL_CTR(x) (2 << (x)) -#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) - -/* 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 - * @clock_src; current clock source for each counter (driver specific) - * @gate_src; current gate source for each counter (driver specific) - * @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; - unsigned int clock_src[3]; - unsigned int gate_src[3]; - bool busy[3]; - - int (*insn_config)(struct comedi_device *dev, - struct comedi_subdevice *s, - struct comedi_insn *insn, unsigned int *data); -}; - -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, - unsigned int counter, unsigned int val); - -int comedi_8254_set_mode(struct comedi_8254 *i8254, - unsigned int counter, unsigned int mode); -int comedi_8254_load(struct comedi_8254 *i8254, - unsigned int counter, unsigned int val, unsigned int mode); - -void comedi_8254_pacer_enable(struct comedi_8254 *i8254, - unsigned int counter1, unsigned int counter2, - bool enable); -void comedi_8254_update_divisors(struct comedi_8254 *i8254); -void comedi_8254_cascade_ns_to_timer(struct comedi_8254 *i8254, - unsigned int *nanosec, unsigned int flags); -void comedi_8254_ns_to_timer(struct comedi_8254 *i8254, - unsigned int *nanosec, unsigned int flags); - -void comedi_8254_set_busy(struct comedi_8254 *i8254, - unsigned int counter, bool busy); - -void comedi_8254_subdevice_init(struct comedi_subdevice *s, - struct comedi_8254 *i8254); - -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 */ |