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cc54a0f7 TK |
1 | /* |
2 | * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved. | |
3 | * | |
1a459660 | 4 | * SPDX-License-Identifier: GPL-2.0+ |
cc54a0f7 TK |
5 | */ |
6 | #ifndef __ASM_ARCH_MXC_MXC_I2C_H__ | |
7 | #define __ASM_ARCH_MXC_MXC_I2C_H__ | |
e1bed802 | 8 | #include <asm-generic/gpio.h> |
552a848e | 9 | #include <asm/mach-imx/iomux-v3.h> |
cc54a0f7 TK |
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 | ||
71204e95 PF |
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 | |
e1bed802 PF |
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 | |
71204e95 PF |
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; | |
e1bed802 PF |
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; | |
71204e95 PF |
59 | #endif |
60 | }; | |
61 | ||
c6c2492a NK |
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 | ||
edbf8b4f SG |
95 | int setup_i2c(unsigned i2c_index, int speed, int slave_addr, |
96 | struct i2c_pads_info *p); | |
71204e95 | 97 | void bus_i2c_init(int index, int speed, int slave_addr, |
cc54a0f7 | 98 | int (*idle_bus_fn)(void *p), void *p); |
71204e95 PF |
99 | int force_idle_bus(void *priv); |
100 | int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus); | |
cc54a0f7 | 101 | #endif |