1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved. 4 */ 5 #ifndef __ASM_ARCH_MXC_MXC_I2C_H__ 6 #define __ASM_ARCH_MXC_MXC_I2C_H__ 7 #include <asm-generic/gpio.h> 8 #include <asm/mach-imx/iomux-v3.h> 9 #if CONFIG_IS_ENABLED(CLK) 10 #include <clk.h> 11 #endif 12 13 struct i2c_pin_ctrl { 14 iomux_v3_cfg_t i2c_mode; 15 iomux_v3_cfg_t gpio_mode; 16 unsigned char gp; 17 unsigned char spare; 18 }; 19 20 struct i2c_pads_info { 21 struct i2c_pin_ctrl scl; 22 struct i2c_pin_ctrl sda; 23 }; 24 25 /* 26 * Information about i2c controller 27 * struct mxc_i2c_bus - information about the i2c[x] bus 28 * @index: i2c bus index 29 * @base: Address of I2C bus controller 30 * @driver_data: Flags for different platforms, such as I2C_QUIRK_FLAG. 31 * @speed: Speed of I2C bus 32 * @pads_info: pinctrl info for this i2c bus, will be used when pinctrl is ok. 33 * The following two is only to be compatible with non-DM part. 34 * @idle_bus_fn: function to force bus idle 35 * @idle_bus_data: parameter for idle_bus_fun 36 * For DM: 37 * bus: The device structure for i2c bus controller 38 * scl-gpio: specify the gpio related to SCL pin 39 * sda-gpio: specify the gpio related to SDA pin 40 */ 41 struct mxc_i2c_bus { 42 /* 43 * board file can use this index to locate which i2c_pads_info is for 44 * i2c_idle_bus. When pinmux is implement, this entry can be 45 * discarded. Here we do not use dev_seq(dev), because we do not want to 46 * export device to board file. 47 */ 48 int index; 49 ulong base; 50 ulong driver_data; 51 int speed; 52 struct i2c_pads_info *pads_info; 53 #if CONFIG_IS_ENABLED(CLK) 54 struct clk per_clk; 55 #endif 56 #if !CONFIG_IS_ENABLED(DM_I2C) 57 int (*idle_bus_fn)(void *p); 58 void *idle_bus_data; 59 #else 60 struct udevice *bus; 61 /* Use gpio to force bus idle when bus state is abnormal */ 62 struct gpio_desc scl_gpio; 63 struct gpio_desc sda_gpio; 64 #endif 65 }; 66 67 #if defined(CONFIG_MX6QDL) 68 #define I2C_PADS(name, scl_i2c, scl_gpio, scl_gp, sda_i2c, sda_gpio, sda_gp) \ 69 struct i2c_pads_info mx6q_##name = { \ 70 .scl = { \ 71 .i2c_mode = MX6Q_##scl_i2c, \ 72 .gpio_mode = MX6Q_##scl_gpio, \ 73 .gp = scl_gp, \ 74 }, \ 75 .sda = { \ 76 .i2c_mode = MX6Q_##sda_i2c, \ 77 .gpio_mode = MX6Q_##sda_gpio, \ 78 .gp = sda_gp, \ 79 } \ 80 }; \ 81 struct i2c_pads_info mx6s_##name = { \ 82 .scl = { \ 83 .i2c_mode = MX6DL_##scl_i2c, \ 84 .gpio_mode = MX6DL_##scl_gpio, \ 85 .gp = scl_gp, \ 86 }, \ 87 .sda = { \ 88 .i2c_mode = MX6DL_##sda_i2c, \ 89 .gpio_mode = MX6DL_##sda_gpio, \ 90 .gp = sda_gp, \ 91 } \ 92 }; 93 94 95 #define I2C_PADS_INFO(name) \ 96 (is_mx6dq() || is_mx6dqp()) ? &mx6q_##name : &mx6s_##name 97 #endif 98 99 int setup_i2c(unsigned i2c_index, int speed, int slave_addr, 100 struct i2c_pads_info *p); 101 void bus_i2c_init(int index, int speed, int slave_addr, 102 int (*idle_bus_fn)(void *p), void *p); 103 int force_idle_bus(void *priv); 104 int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus); 105 #endif 106