LXR uboot/arch/arm/include/asm/mach-imx/mxc

   1/*
   2 * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0+
   5 */
   6#ifndef __ASM_ARCH_MXC_MXC_I2C_H__
   7#define __ASM_ARCH_MXC_MXC_I2C_H__
   8#include <asm-generic/gpio.h>
   9#include <asm/mach-imx/iomux-v3.h>
  10
  11struct i2c_pin_ctrl {
  12        iomux_v3_cfg_t i2c_mode;
  13        iomux_v3_cfg_t gpio_mode;
  14        unsigned char gp;
  15        unsigned char spare;
  16};
  17
  18struct i2c_pads_info {
  19        struct i2c_pin_ctrl scl;
  20        struct i2c_pin_ctrl sda;
  21};
  22
  23/*
  24 * Information about i2c controller
  25 * struct mxc_i2c_bus - information about the i2c[x] bus
  26 * @index: i2c bus index
  27 * @base: Address of I2C bus controller
  28 * @driver_data: Flags for different platforms, such as I2C_QUIRK_FLAG.
  29 * @speed: Speed of I2C bus
  30 * @pads_info: pinctrl info for this i2c bus, will be used when pinctrl is ok.
  31 * The following two is only to be compatible with non-DM part.
  32 * @idle_bus_fn: function to force bus idle
  33 * @idle_bus_data: parameter for idle_bus_fun
  34 * For DM:
  35 * bus: The device structure for i2c bus controller
  36 * scl-gpio: specify the gpio related to SCL pin
  37 * sda-gpio: specify the gpio related to SDA pin
  38 */
  39struct mxc_i2c_bus {
  40        /*
  41         * board file can use this index to locate which i2c_pads_info is for
  42         * i2c_idle_bus. When pinmux is implement, this entry can be
  43         * discarded. Here we do not use dev->seq, because we do not want to
  44         * export device to board file.
  45         */
  46        int index;
  47        ulong base;
  48        ulong driver_data;
  49        int speed;
  50        struct i2c_pads_info *pads_info;
  51#ifndef CONFIG_DM_I2C
  52        int (*idle_bus_fn)(void *p);
  53        void *idle_bus_data;
  54#else
  55        struct udevice *bus;
  56        /* Use gpio to force bus idle when bus state is abnormal */
  57        struct gpio_desc scl_gpio;
  58        struct gpio_desc sda_gpio;
  59#endif
  60};
  61
  62#if defined(CONFIG_MX6QDL)
  63#define I2C_PADS(name, scl_i2c, scl_gpio, scl_gp, sda_i2c, sda_gpio, sda_gp) \
  64        struct i2c_pads_info mx6q_##name = {            \
  65                .scl = {                                \
  66                        .i2c_mode = MX6Q_##scl_i2c,     \
  67                        .gpio_mode = MX6Q_##scl_gpio,   \
  68                        .gp = scl_gp,                   \
  69                },                                      \
  70                .sda = {                                \
  71                        .i2c_mode = MX6Q_##sda_i2c,     \
  72                        .gpio_mode = MX6Q_##sda_gpio,   \
  73                        .gp = sda_gp,                   \
  74                }                                       \
  75        };                                              \
  76        struct i2c_pads_info mx6s_##name = {            \
  77                .scl = {                                \
  78                        .i2c_mode = MX6DL_##scl_i2c,    \
  79                        .gpio_mode = MX6DL_##scl_gpio,  \
  80                        .gp = scl_gp,                   \
  81                },                                      \
  82                .sda = {                                \
  83                        .i2c_mode = MX6DL_##sda_i2c,    \
  84                        .gpio_mode = MX6DL_##sda_gpio,  \
  85                        .gp = sda_gp,                   \
  86                }                                       \
  87        };
  88
  89
  90#define I2C_PADS_INFO(name)     \
  91        (is_cpu_type(MXC_CPU_MX6Q) || is_cpu_type(MXC_CPU_MX6D)) ? \
  92                                        &mx6q_##name : &mx6s_##name
  93#endif
  94
  95int setup_i2c(unsigned i2c_index, int speed, int slave_addr,
  96              struct i2c_pads_info *p);
  97void bus_i2c_init(int index, int speed, int slave_addr,
  98                int (*idle_bus_fn)(void *p), void *p);
  99int force_idle_bus(void *priv);
 100int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus);
 101#endif
 102