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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _LINUX_I2C_ALGO_PCA_H |
3 | #define _LINUX_I2C_ALGO_PCA_H | |
4 | ||
eff9ec95 MAC |
5 | /* Chips known to the pca algo */ |
6 | #define I2C_PCA_CHIP_9564 0x00 | |
7 | #define I2C_PCA_CHIP_9665 0x01 | |
8 | ||
9 | /* Internal period for PCA9665 oscilator */ | |
10 | #define I2C_PCA_OSC_PER 3 /* e10-8s */ | |
11 | ||
12 | /* Clock speeds for the bus for PCA9564*/ | |
c01b0831 WS |
13 | #define I2C_PCA_CON_330kHz 0x00 |
14 | #define I2C_PCA_CON_288kHz 0x01 | |
15 | #define I2C_PCA_CON_217kHz 0x02 | |
16 | #define I2C_PCA_CON_146kHz 0x03 | |
17 | #define I2C_PCA_CON_88kHz 0x04 | |
18 | #define I2C_PCA_CON_59kHz 0x05 | |
19 | #define I2C_PCA_CON_44kHz 0x06 | |
20 | #define I2C_PCA_CON_36kHz 0x07 | |
21 | ||
22 | /* PCA9564 registers */ | |
23 | #define I2C_PCA_STA 0x00 /* STATUS Read Only */ | |
24 | #define I2C_PCA_TO 0x00 /* TIMEOUT Write Only */ | |
25 | #define I2C_PCA_DAT 0x01 /* DATA Read/Write */ | |
26 | #define I2C_PCA_ADR 0x02 /* OWN ADR Read/Write */ | |
27 | #define I2C_PCA_CON 0x03 /* CONTROL Read/Write */ | |
28 | ||
eff9ec95 MAC |
29 | /* PCA9665 registers */ |
30 | #define I2C_PCA_INDPTR 0x00 /* INDIRECT Pointer Write Only */ | |
31 | #define I2C_PCA_IND 0x02 /* INDIRECT Read/Write */ | |
32 | ||
33 | /* PCA9665 indirect registers */ | |
34 | #define I2C_PCA_ICOUNT 0x00 /* Byte Count for buffered mode */ | |
35 | #define I2C_PCA_IADR 0x01 /* OWN ADR */ | |
36 | #define I2C_PCA_ISCLL 0x02 /* SCL LOW period */ | |
37 | #define I2C_PCA_ISCLH 0x03 /* SCL HIGH period */ | |
38 | #define I2C_PCA_ITO 0x04 /* TIMEOUT */ | |
39 | #define I2C_PCA_IPRESET 0x05 /* Parallel bus reset */ | |
40 | #define I2C_PCA_IMODE 0x06 /* I2C Bus mode */ | |
41 | ||
42 | /* PCA9665 I2C bus mode */ | |
43 | #define I2C_PCA_MODE_STD 0x00 /* Standard mode */ | |
44 | #define I2C_PCA_MODE_FAST 0x01 /* Fast mode */ | |
45 | #define I2C_PCA_MODE_FASTP 0x02 /* Fast Plus mode */ | |
46 | #define I2C_PCA_MODE_TURBO 0x03 /* Turbo mode */ | |
47 | ||
48 | ||
c01b0831 WS |
49 | #define I2C_PCA_CON_AA 0x80 /* Assert Acknowledge */ |
50 | #define I2C_PCA_CON_ENSIO 0x40 /* Enable */ | |
51 | #define I2C_PCA_CON_STA 0x20 /* Start */ | |
52 | #define I2C_PCA_CON_STO 0x10 /* Stop */ | |
53 | #define I2C_PCA_CON_SI 0x08 /* Serial Interrupt */ | |
54 | #define I2C_PCA_CON_CR 0x07 /* Clock Rate (MASK) */ | |
55 | ||
0a355aeb EN |
56 | /** |
57 | * struct pca_i2c_bus_settings - The configured PCA i2c bus settings | |
58 | * @mode: Configured i2c bus mode | |
59 | * @tlow: Configured SCL LOW period | |
60 | * @thi: Configured SCL HIGH period | |
61 | * @clock_freq: The configured clock frequency | |
62 | */ | |
63 | struct pca_i2c_bus_settings { | |
64 | int mode; | |
65 | int tlow; | |
66 | int thi; | |
67 | int clock_freq; | |
68 | }; | |
69 | ||
1da177e4 | 70 | struct i2c_algo_pca_data { |
c01b0831 WS |
71 | void *data; /* private low level data */ |
72 | void (*write_byte) (void *data, int reg, int val); | |
73 | int (*read_byte) (void *data, int reg); | |
74 | int (*wait_for_completion) (void *data); | |
75 | void (*reset_chip) (void *data); | |
eff9ec95 MAC |
76 | /* For PCA9564, use one of the predefined frequencies: |
77 | * 330000, 288000, 217000, 146000, 88000, 59000, 44000, 36000 | |
78 | * For PCA9665, use the frequency you want here. */ | |
c01b0831 | 79 | unsigned int i2c_clock; |
a76e7c68 | 80 | unsigned int chip; |
0a355aeb | 81 | struct pca_i2c_bus_settings bus_settings; |
1da177e4 LT |
82 | }; |
83 | ||
1da177e4 | 84 | int i2c_pca_add_bus(struct i2c_adapter *); |
c01b0831 | 85 | int i2c_pca_add_numbered_bus(struct i2c_adapter *); |
1da177e4 LT |
86 | |
87 | #endif /* _LINUX_I2C_ALGO_PCA_H */ |