ti-eqep.c | Explore in Territory

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2019 David Lechner <[email protected]>
 *
 * Counter driver for Texas Instruments Enhanced Quadrature Encoder Pulse (eQEP)
 */

#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/counter.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/types.h>

/* 32-bit registers */
#define QPOSCNT …
#define QPOSINIT …
#define QPOSMAX …
#define QPOSCMP …
#define QPOSILAT …
#define QPOSSLAT …
#define QPOSLAT …
#define QUTMR …
#define QUPRD …

/* 16-bit registers */
#define QWDTMR …
#define QWDPRD …
#define QDECCTL …
#define QEPCTL …
#define QCAPCTL …
#define QPOSCTL …
#define QEINT …
#define QFLG …
#define QCLR …
#define QFRC …
#define QEPSTS …
#define QCTMR …
#define QCPRD …
#define QCTMRLAT …
#define QCPRDLAT …

#define QDECCTL_QSRC_SHIFT …
#define QDECCTL_QSRC …
#define QDECCTL_SOEN …
#define QDECCTL_SPSEL …
#define QDECCTL_XCR …
#define QDECCTL_SWAP …
#define QDECCTL_IGATE …
#define QDECCTL_QAP …
#define QDECCTL_QBP …
#define QDECCTL_QIP …
#define QDECCTL_QSP …

#define QEPCTL_FREE_SOFT …
#define QEPCTL_PCRM …
#define QEPCTL_SEI …
#define QEPCTL_IEI …
#define QEPCTL_SWI …
#define QEPCTL_SEL …
#define QEPCTL_IEL …
#define QEPCTL_PHEN …
#define QEPCTL_QCLM …
#define QEPCTL_UTE …
#define QEPCTL_WDE …

#define QEINT_UTO …
#define QEINT_IEL …
#define QEINT_SEL …
#define QEINT_PCM …
#define QEINT_PCR …
#define QEINT_PCO …
#define QEINT_PCU …
#define QEINT_WTO …
#define QEINT_QDC …
#define QEINT_PHE …
#define QEINT_PCE …

#define QFLG_UTO …
#define QFLG_IEL …
#define QFLG_SEL …
#define QFLG_PCM …
#define QFLG_PCR …
#define QFLG_PCO …
#define QFLG_PCU …
#define QFLG_WTO …
#define QFLG_QDC …
#define QFLG_PHE …
#define QFLG_PCE …
#define QFLG_INT …

#define QCLR_UTO …
#define QCLR_IEL …
#define QCLR_SEL …
#define QCLR_PCM …
#define QCLR_PCR …
#define QCLR_PCO …
#define QCLR_PCU …
#define QCLR_WTO …
#define QCLR_QDC …
#define QCLR_PHE …
#define QCLR_PCE …
#define QCLR_INT …

/* EQEP Inputs */
enum { … };

/* Position Counter Input Modes */
enum ti_eqep_count_func { … };

struct ti_eqep_cnt { … };

static int ti_eqep_count_read(struct counter_device *counter,
			      struct counter_count *count, u64 *val)
{ … }

static int ti_eqep_count_write(struct counter_device *counter,
			       struct counter_count *count, u64 val)
{ … }

static int ti_eqep_function_read(struct counter_device *counter,
				 struct counter_count *count,
				 enum counter_function *function)
{ … }

static int ti_eqep_function_write(struct counter_device *counter,
				  struct counter_count *count,
				  enum counter_function function)
{ … }

static int ti_eqep_action_read(struct counter_device *counter,
			       struct counter_count *count,
			       struct counter_synapse *synapse,
			       enum counter_synapse_action *action)
{ … }

static int ti_eqep_events_configure(struct counter_device *counter)
{ … }

static int ti_eqep_watch_validate(struct counter_device *counter,
				  const struct counter_watch *watch)
{ … }

static const struct counter_ops ti_eqep_counter_ops = …;

static int ti_eqep_position_ceiling_read(struct counter_device *counter,
					 struct counter_count *count,
					 u64 *ceiling)
{ … }

static int ti_eqep_position_ceiling_write(struct counter_device *counter,
					  struct counter_count *count,
					  u64 ceiling)
{ … }

static int ti_eqep_position_enable_read(struct counter_device *counter,
					struct counter_count *count, u8 *enable)
{ … }

static int ti_eqep_position_enable_write(struct counter_device *counter,
					 struct counter_count *count, u8 enable)
{ … }

static struct counter_comp ti_eqep_position_ext[] = …;

static struct counter_signal ti_eqep_signals[] = …;

static const enum counter_function ti_eqep_position_functions[] = …;

static const enum counter_synapse_action ti_eqep_position_synapse_actions[] = …;

static struct counter_synapse ti_eqep_position_synapses[] = …;

static struct counter_count ti_eqep_counts[] = …;

static irqreturn_t ti_eqep_irq_handler(int irq, void *dev_id)
{ … }

static const struct regmap_config ti_eqep_regmap32_config = …;

static const struct regmap_config ti_eqep_regmap16_config = …;

static int ti_eqep_probe(struct platform_device *pdev)
{ … }

static void ti_eqep_remove(struct platform_device *pdev)
{ … }

static const struct of_device_id ti_eqep_of_match[] = …;
MODULE_DEVICE_TABLE(of, ti_eqep_of_match);

static struct platform_driver ti_eqep_driver = …;
module_platform_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;
MODULE_IMPORT_NS(…);
linux/drivers/counter/ti-eqep.c
