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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* QMC management
*
* Copyright 2022 CS GROUP France
*
* Author: Herve Codina <herve.codina@bootlin.com>
*/
#ifndef __SOC_FSL_QMC_H__
#define __SOC_FSL_QMC_H__
#include <linux/bits.h>
#include <linux/types.h>
struct device_node;
struct device;
struct qmc_chan;
struct qmc_chan *qmc_chan_get_byphandle(struct device_node *np, const char *phandle_name);
struct qmc_chan *qmc_chan_get_bychild(struct device_node *np);
void qmc_chan_put(struct qmc_chan *chan);
struct qmc_chan *devm_qmc_chan_get_byphandle(struct device *dev, struct device_node *np,
const char *phandle_name);
struct qmc_chan *devm_qmc_chan_get_bychild(struct device *dev, struct device_node *np);
enum qmc_mode {
QMC_TRANSPARENT,
QMC_HDLC,
};
struct qmc_chan_info {
enum qmc_mode mode;
unsigned long rx_fs_rate;
unsigned long rx_bit_rate;
u8 nb_rx_ts;
unsigned long tx_fs_rate;
unsigned long tx_bit_rate;
u8 nb_tx_ts;
};
int qmc_chan_get_info(struct qmc_chan *chan, struct qmc_chan_info *info);
struct qmc_chan_ts_info {
u64 rx_ts_mask_avail;
u64 tx_ts_mask_avail;
u64 rx_ts_mask;
u64 tx_ts_mask;
};
int qmc_chan_get_ts_info(struct qmc_chan *chan, struct qmc_chan_ts_info *ts_info);
int qmc_chan_set_ts_info(struct qmc_chan *chan, const struct qmc_chan_ts_info *ts_info);
struct qmc_chan_param {
enum qmc_mode mode;
union {
struct {
u16 max_rx_buf_size;
u16 max_rx_frame_size;
bool is_crc32;
} hdlc;
struct {
u16 max_rx_buf_size;
} transp;
};
};
int qmc_chan_set_param(struct qmc_chan *chan, const struct qmc_chan_param *param);
int qmc_chan_write_submit(struct qmc_chan *chan, dma_addr_t addr, size_t length,
void (*complete)(void *context), void *context);
/* Flags available (ORed) for read complete() flags parameter in HDLC mode.
* No flags are available in transparent mode and the read complete() flags
* parameter has no meaning in transparent mode.
*/
#define QMC_RX_FLAG_HDLC_LAST BIT(11) /* Last in frame */
#define QMC_RX_FLAG_HDLC_FIRST BIT(10) /* First in frame */
#define QMC_RX_FLAG_HDLC_OVF BIT(5) /* Data overflow */
#define QMC_RX_FLAG_HDLC_UNA BIT(4) /* Unaligned (ie. bits received not multiple of 8) */
#define QMC_RX_FLAG_HDLC_ABORT BIT(3) /* Received an abort sequence (seven consecutive ones) */
#define QMC_RX_FLAG_HDLC_CRC BIT(2) /* CRC error */
int qmc_chan_read_submit(struct qmc_chan *chan, dma_addr_t addr, size_t length,
void (*complete)(void *context, size_t length,
unsigned int flags),
void *context);
#define QMC_CHAN_READ (1<<0)
#define QMC_CHAN_WRITE (1<<1)
#define QMC_CHAN_ALL (QMC_CHAN_READ | QMC_CHAN_WRITE)
int qmc_chan_start(struct qmc_chan *chan, int direction);
int qmc_chan_stop(struct qmc_chan *chan, int direction);
int qmc_chan_reset(struct qmc_chan *chan, int direction);
#endif /* __SOC_FSL_QMC_H__ */
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