LXR linux/include/linux/dma/qcom-gpi-dma.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Copyright (c) 2020, Linaro Limited
   4 */
   5
   6#ifndef QCOM_GPI_DMA_H
   7#define QCOM_GPI_DMA_H
   8
   9/**
  10 * enum spi_transfer_cmd - spi transfer commands
  11 */
  12enum spi_transfer_cmd {
  13        SPI_TX = 1,
  14        SPI_RX,
  15        SPI_DUPLEX,
  16};
  17
  18/**
  19 * struct gpi_spi_config - spi config for peripheral
  20 *
  21 * @loopback_en: spi loopback enable when set
  22 * @clock_pol_high: clock polarity
  23 * @data_pol_high: data polarity
  24 * @pack_en: process tx/rx buffers as packed
  25 * @word_len: spi word length
  26 * @clk_div: source clock divider
  27 * @clk_src: serial clock
  28 * @cmd: spi cmd
  29 * @fragmentation: keep CS assserted at end of sequence
  30 * @cs: chip select toggle
  31 * @set_config: set peripheral config
  32 * @rx_len: receive length for buffer
  33 */
  34struct gpi_spi_config {
  35        u8 set_config;
  36        u8 loopback_en;
  37        u8 clock_pol_high;
  38        u8 data_pol_high;
  39        u8 pack_en;
  40        u8 word_len;
  41        u8 fragmentation;
  42        u8 cs;
  43        u32 clk_div;
  44        u32 clk_src;
  45        enum spi_transfer_cmd cmd;
  46        u32 rx_len;
  47};
  48
  49enum i2c_op {
  50        I2C_WRITE = 1,
  51        I2C_READ,
  52};
  53
  54/**
  55 * struct gpi_i2c_config - i2c config for peripheral
  56 *
  57 * @pack_enable: process tx/rx buffers as packed
  58 * @cycle_count: clock cycles to be sent
  59 * @high_count: high period of clock
  60 * @low_count: low period of clock
  61 * @clk_div: source clock divider
  62 * @addr: i2c bus address
  63 * @stretch: stretch the clock at eot
  64 * @set_config: set peripheral config
  65 * @rx_len: receive length for buffer
  66 * @op: i2c cmd
  67 * @muli-msg: is part of multi i2c r-w msgs
  68 */
  69struct gpi_i2c_config {
  70        u8 set_config;
  71        u8 pack_enable;
  72        u8 cycle_count;
  73        u8 high_count;
  74        u8 low_count;
  75        u8 addr;
  76        u8 stretch;
  77        u16 clk_div;
  78        u32 rx_len;
  79        enum i2c_op op;
  80        bool multi_msg;
  81};
  82
  83#endif /* QCOM_GPI_DMA_H */
  84