arch/arm/include/asm/imx-common/mxc_i2c.h

   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/imx-common/iomux-v3.h>
   9
  10 struct i2c_pin_ctrl {
  11         iomux_v3_cfg_t i2c_mode;
  12         iomux_v3_cfg_t gpio_mode;
  13         unsigned char gp;
  14         unsigned char spare;
  15 };
  16
  17 struct i2c_pads_info {
  18         struct i2c_pin_ctrl scl;
  19         struct i2c_pin_ctrl sda;
  20 };
  21
  22 /*
  23  * Information about i2c controller
  24  * struct mxc_i2c_bus - information about the i2c[x] bus
  25  * @index: i2c bus index
  26  * @base: Address of I2C bus controller
  27  * @driver_data: Flags for different platforms, such as I2C_QUIRK_FLAG.
  28  * @speed: Speed of I2C bus
  29  * @pads_info: pinctrl info for this i2c bus, will be used when pinctrl is ok.
  30  * The following two is only to be compatible with non-DM part.
  31  * @idle_bus_fn: function to force bus idle
  32  * @idle_bus_data: parameter for idle_bus_fun
  33  */
  34 struct mxc_i2c_bus {
  35         /*
  36          * board file can use this index to locate which i2c_pads_info is for
  37          * i2c_idle_bus. When pinmux is implement, this entry can be
  38          * discarded. Here we do not use dev->seq, because we do not want to
  39          * export device to board file.
  40          */
  41         int index;
  42         ulong base;
  43         ulong driver_data;
  44         int speed;
  45         struct i2c_pads_info *pads_info;
  46 #ifndef CONFIG_DM_I2C
  47         int (*idle_bus_fn)(void *p);
  48         void *idle_bus_data;
  49 #endif
  50 };
  51
  52 #if defined(CONFIG_SOC_MX6QDL)
  53 #define I2C_PADS(name, scl_i2c, scl_gpio, scl_gp, sda_i2c, sda_gpio, sda_gp) \
  54         struct i2c_pads_info mx6q_##name = {            \
  55                 .scl = {                                \
  56                         .i2c_mode = MX6Q_##scl_i2c,     \
  57                         .gpio_mode = MX6Q_##scl_gpio,   \
  58                         .gp = scl_gp,                   \
  59                 },                                      \
  60                 .sda = {                                \
  61                         .i2c_mode = MX6Q_##sda_i2c,     \
  62                         .gpio_mode = MX6Q_##sda_gpio,   \
  63                         .gp = sda_gp,                   \
  64                 }                                       \
  65         };                                              \
  66         struct i2c_pads_info mx6s_##name = {            \
  67                 .scl = {                                \
  68                         .i2c_mode = MX6DL_##scl_i2c,    \
  69                         .gpio_mode = MX6DL_##scl_gpio,  \
  70                         .gp = scl_gp,                   \
  71                 },                                      \
  72                 .sda = {                                \
  73                         .i2c_mode = MX6DL_##sda_i2c,    \
  74                         .gpio_mode = MX6DL_##sda_gpio,  \
  75                         .gp = sda_gp,                   \
  76                 }                                       \
  77         };
  78
  79
  80 #define I2C_PADS_INFO(name)     \
  81         (is_cpu_type(MXC_CPU_MX6Q) || is_cpu_type(MXC_CPU_MX6D)) ? \
  82                                         &mx6q_##name : &mx6s_##name
  83 #endif
  84
  85 int setup_i2c(unsigned i2c_index, int speed, int slave_addr,
  86               struct i2c_pads_info *p);
  87 void bus_i2c_init(int index, int speed, int slave_addr,
  88                 int (*idle_bus_fn)(void *p), void *p);
  89 int force_idle_bus(void *priv);
  90 int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus);
  91 #endif