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  */
  12 enum 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 asserted at end of sequence
  30  * @cs: chip select toggle
  31  * @set_config: set peripheral config
  32  * @rx_len: receive length for buffer
  33  */
  34 struct 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
  49 enum 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  */
  69 struct 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 */