1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * QMC management 4 * 5 * Copyright 2022 CS GROUP France 6 * 7 * Author: Herve Codina <herve.codina@bootlin.com> 8 */ 9 #ifndef __SOC_FSL_QMC_H__ 10 #define __SOC_FSL_QMC_H__ 11 12 #include <linux/types.h> 13 14 struct device_node; 15 struct device; 16 struct qmc_chan; 17 18 struct qmc_chan *qmc_chan_get_byphandle(struct device_node *np, const char *phandle_name); 19 void qmc_chan_put(struct qmc_chan *chan); 20 struct qmc_chan *devm_qmc_chan_get_byphandle(struct device *dev, struct device_node *np, 21 const char *phandle_name); 22 23 enum qmc_mode { 24 QMC_TRANSPARENT, 25 QMC_HDLC, 26 }; 27 28 struct qmc_chan_info { 29 enum qmc_mode mode; 30 unsigned long rx_fs_rate; 31 unsigned long rx_bit_rate; 32 u8 nb_rx_ts; 33 unsigned long tx_fs_rate; 34 unsigned long tx_bit_rate; 35 u8 nb_tx_ts; 36 }; 37 38 int qmc_chan_get_info(struct qmc_chan *chan, struct qmc_chan_info *info); 39 40 struct qmc_chan_param { 41 enum qmc_mode mode; 42 union { 43 struct { 44 u16 max_rx_buf_size; 45 u16 max_rx_frame_size; 46 bool is_crc32; 47 } hdlc; 48 struct { 49 u16 max_rx_buf_size; 50 } transp; 51 }; 52 }; 53 54 int qmc_chan_set_param(struct qmc_chan *chan, const struct qmc_chan_param *param); 55 56 int qmc_chan_write_submit(struct qmc_chan *chan, dma_addr_t addr, size_t length, 57 void (*complete)(void *context), void *context); 58 59 int qmc_chan_read_submit(struct qmc_chan *chan, dma_addr_t addr, size_t length, 60 void (*complete)(void *context, size_t length), 61 void *context); 62 63 #define QMC_CHAN_READ (1<<0) 64 #define QMC_CHAN_WRITE (1<<1) 65 #define QMC_CHAN_ALL (QMC_CHAN_READ | QMC_CHAN_WRITE) 66 67 int qmc_chan_start(struct qmc_chan *chan, int direction); 68 int qmc_chan_stop(struct qmc_chan *chan, int direction); 69 int qmc_chan_reset(struct qmc_chan *chan, int direction); 70 71 #endif /* __SOC_FSL_QMC_H__ */ 72