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 11 struct 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 18 struct 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 */ 39 struct 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_mx6dq() || is_mx6dqp()) ? &mx6q_##name : &mx6s_##name 92 #endif 93 94 int setup_i2c(unsigned i2c_index, int speed, int slave_addr, 95 struct i2c_pads_info *p); 96 void bus_i2c_init(int index, int speed, int slave_addr, 97 int (*idle_bus_fn)(void *p), void *p); 98 int force_idle_bus(void *priv); 99 int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus); 100 #endif 101