linux/drivers/media/cec/platform/stm32/stm32-cec.c

// SPDX-License-Identifier: GPL-2.0
/*
 * STM32 CEC driver
 * Copyright (C) STMicroelectronics SA 2017
 *
 */

#include <linux/clk.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>

#include <media/cec.h>

#define CEC_NAME …

/* CEC registers  */
#define CEC_CR …
#define CEC_CFGR …
#define CEC_TXDR …
#define CEC_RXDR …
#define CEC_ISR …
#define CEC_IER …

#define TXEOM …
#define TXSOM …
#define CECEN …

#define LSTN …
#define OAR …
#define SFTOP …
#define BRDNOGEN …
#define LBPEGEN …
#define BREGEN …
#define BRESTP …
#define RXTOL …
#define SFT …
#define FULL_CFG …

#define TXACKE …
#define TXERR …
#define TXUDR …
#define TXEND …
#define TXBR …
#define ARBLST …
#define RXACKE …
#define RXOVR …
#define RXEND …
#define RXBR …

#define ALL_TX_IT …
#define ALL_RX_IT …

/*
 * 400 ms is the time it takes for one 16 byte message to be
 * transferred and 5 is the maximum number of retries. Add
 * another 100 ms as a margin.
 */
#define CEC_XFER_TIMEOUT_MS …

struct stm32_cec { … };

static void cec_hw_init(struct stm32_cec *cec)
{ … }

static void stm32_tx_done(struct stm32_cec *cec, u32 status)
{ … }

static void stm32_rx_done(struct stm32_cec *cec, u32 status)
{ … }

static irqreturn_t stm32_cec_irq_thread(int irq, void *arg)
{ … }

static irqreturn_t stm32_cec_irq_handler(int irq, void *arg)
{ … }

static int stm32_cec_adap_enable(struct cec_adapter *adap, bool enable)
{ … }

static int stm32_cec_adap_log_addr(struct cec_adapter *adap, u8 logical_addr)
{ … }

static int stm32_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
				   u32 signal_free_time, struct cec_msg *msg)
{ … }

static const struct cec_adap_ops stm32_cec_adap_ops = …;

static const struct regmap_config stm32_cec_regmap_cfg = …;

static int stm32_cec_probe(struct platform_device *pdev)
{ … }

static void stm32_cec_remove(struct platform_device *pdev)
{ … }

static const struct of_device_id stm32_cec_of_match[] = …;
MODULE_DEVICE_TABLE(of, stm32_cec_of_match);

static struct platform_driver stm32_cec_driver = …;

module_platform_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;