1 ==================
2 Driver i2c-mlxcpld
3 ==================
4
5 Author: Michael Shych <michaelsh@mellanox.com>
6
7 This is the Mellanox I2C controller logic, imp
8 device.
9
10 Device supports:
11 - Master mode.
12 - One physical bus.
13 - Polling mode.
14
15 This controller is equipped within the next Me
16 "msx6710", "msx6720", "msb7700", "msn2700", "m
17 "msn2740", "msn2100".
18
19 The next transaction types are supported:
20 - Receive Byte/Block.
21 - Send Byte/Block.
22 - Read Byte/Block.
23 - Write Byte/Block.
24
25 Registers:
26
27 =============== === ==========================
28 CPBLTY 0x0 - capability reg.
29 Bits [6:5] - transacti
30 36B in other case.
31 Bit 7 - SMBus block re
32 CTRL 0x1 - control reg.
33 Resets all the registe
34 HALF_CYC 0x4 - cycle reg.
35 Configure the width of
36 units).
37 I2C_HOLD 0x5 - hold reg.
38 OE (output enable) is
39 (in LPC_CLK units)
40 CMD 0x6 - command reg.
41 Bit 0, 0 = write, 1 =
42 Bits [7:1] - the 7bit
43 It should be written l
44 NUM_DATA 0x7 - data size reg.
45 Number of data bytes t
46 NUM_ADDR 0x8 - address reg.
47 Number of address byte
48 STATUS 0x9 - status reg.
49 Bit 0 - transaction is
50 Bit 4 - ACK/NACK.
51 DATAx 0xa - 0x54 - 68 bytes data bu
52 For write transaction
53 (DATA1 - DATA4), data
54 For read transactions
55 specified in the four
56 starting from DATA0.
57 =============== === ==========================
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