blob: 3915af83723e701ad94395867ecabd51edbce980 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
#ifndef _AT91_I2C_H
#define _AT91_I2C_H
#include <linux/bitops.h>
#define TWI_CR_START BIT(0) /* Send a Start Condition */
#define TWI_CR_MSEN BIT(2) /* Master Transfer Enable */
#define TWI_CR_STOP BIT(1) /* Send a Stop Condition */
#define TWI_CR_SVDIS BIT(5) /* Slave Transfer Disable */
#define TWI_CR_SWRST BIT(7) /* Software Reset */
#define TWI_CR_ACMEN BIT(16) /* Alternative Command Mode Enable */
#define TWI_CR_ACMDIS BIT(17) /* Alternative Command Mode Disable */
#define TWI_CR_LOCKCLR BIT(26) /* Lock Clear */
#define TWI_MMR_MREAD BIT(12) /* Master Read Direction */
#define TWI_MMR_IADRSZ_1 BIT(8) /* Internal Device Address Size */
#define TWI_SR_TXCOMP BIT(0) /* Transmission Complete */
#define TWI_SR_RXRDY BIT(1) /* Receive Holding Register Ready */
#define TWI_SR_TXRDY BIT(2) /* Transmit Holding Register Ready */
#define TWI_SR_OVRE BIT(6) /* Overrun Error */
#define TWI_SR_UNRE BIT(7) /* Underrun Error */
#define TWI_SR_NACK BIT(8) /* Not Acknowledged */
#define TWI_SR_LOCK BIT(23) /* TWI Lock due to Frame Errors */
#define TWI_ACR_DATAL(len) ((len) & 0xff)
#define TWI_ACR_DIR_READ BIT(8)
#define TWI_CWGR_HOLD_MAX 0x1f
#define TWI_CWGR_HOLD(x) (((x) & TWI_CWGR_HOLD_MAX) << 24)
struct at91_i2c_regs {
u32 cr;
u32 mmr;
u32 smr;
u32 iadr;
u32 cwgr;
u32 rev_0[3];
u32 sr;
u32 ier;
u32 idr;
u32 imr;
u32 rhr;
u32 thr;
u32 smbtr;
u32 rev_1;
u32 acr;
u32 filtr;
u32 rev_2;
u32 swmr;
u32 fmr;
u32 flr;
u32 rev_3;
u32 fsr;
u32 fier;
u32 fidr;
u32 fimr;
u32 rev_4[29];
u32 wpmr;
u32 wpsr;
u32 rev_5[6];
};
struct at91_i2c_pdata {
unsigned clk_max_div;
unsigned clk_offset;
};
struct at91_i2c_bus {
struct at91_i2c_regs *regs;
u32 status;
ulong bus_clk_rate;
u32 clock_frequency;
u32 speed;
u32 cwgr_val;
const struct at91_i2c_pdata *pdata;
};
#endif
|
