xref: /openbmc/u-boot/drivers/i2c/s3c24x0_i2c.h (revision e8f80a5a)
1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * Copyright (C) 2012 Samsung Electronics
4  */
5 
6 #ifndef _S3C24X0_I2C_H
7 #define _S3C24X0_I2C_H
8 
9 struct s3c24x0_i2c {
10 	u32	iiccon;
11 	u32	iicstat;
12 	u32	iicadd;
13 	u32	iicds;
14 	u32	iiclc;
15 };
16 
17 struct exynos5_hsi2c {
18 	u32	usi_ctl;
19 	u32	usi_fifo_ctl;
20 	u32	usi_trailing_ctl;
21 	u32	usi_clk_ctl;
22 	u32	usi_clk_slot;
23 	u32	spi_ctl;
24 	u32	uart_ctl;
25 	u32	res1;
26 	u32	usi_int_en;
27 	u32	usi_int_stat;
28 	u32	usi_modem_stat;
29 	u32	usi_error_stat;
30 	u32	usi_fifo_stat;
31 	u32	usi_txdata;
32 	u32	usi_rxdata;
33 	u32	res2;
34 	u32	usi_conf;
35 	u32	usi_auto_conf;
36 	u32	usi_timeout;
37 	u32	usi_manual_cmd;
38 	u32	usi_trans_status;
39 	u32	usi_timing_hs1;
40 	u32	usi_timing_hs2;
41 	u32	usi_timing_hs3;
42 	u32	usi_timing_fs1;
43 	u32	usi_timing_fs2;
44 	u32	usi_timing_fs3;
45 	u32	usi_timing_sla;
46 	u32	i2c_addr;
47 };
48 
49 struct s3c24x0_i2c_bus {
50 	bool active;	/* port is active and available */
51 	int node;	/* device tree node */
52 	int bus_num;	/* i2c bus number */
53 	struct s3c24x0_i2c *regs;
54 	struct exynos5_hsi2c *hsregs;
55 	int is_highspeed;	/* High speed type, rather than I2C */
56 	unsigned clock_frequency;
57 	int id;
58 	unsigned clk_cycle;
59 	unsigned clk_div;
60 };
61 
62 #define	I2C_WRITE	0
63 #define I2C_READ	1
64 
65 #define I2C_OK		0
66 #define I2C_NOK		1
67 #define I2C_NACK	2
68 #define I2C_NOK_LA	3	/* Lost arbitration */
69 #define I2C_NOK_TOUT	4	/* time out */
70 
71 /* S3C I2C Controller bits */
72 #define I2CSTAT_BSY	0x20	/* Busy bit */
73 #define I2CSTAT_NACK	0x01	/* Nack bit */
74 #define I2CCON_ACKGEN	0x80	/* Acknowledge generation */
75 #define I2CCON_IRPND	0x10	/* Interrupt pending bit */
76 #define I2C_MODE_MT	0xC0	/* Master Transmit Mode */
77 #define I2C_MODE_MR	0x80	/* Master Receive Mode */
78 #define I2C_START_STOP	0x20	/* START / STOP */
79 #define I2C_TXRX_ENA	0x10	/* I2C Tx/Rx enable */
80 
81 #define I2C_TIMEOUT_MS 10		/* 10 ms */
82 
83 #endif /* _S3C24X0_I2C_H */
84