1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /**
3  * Copyright 2014 Freescale Semiconductor
4  *
5  * Author: Chunhe Lan <Chunhe.Lan@freescale.com>
6  *
7  * This file provides support for the ngPIXIS, a board-specific FPGA used on
8  * some Freescale reference boards.
9  */
10 
11 /*
12  * CPLD register set. Feel free to add board-specific #ifdefs where necessary.
13  */
14 struct cpld_data {
15 	u8 chip_id1;	/* 0x00 - CPLD Chip ID1 Register */
16 	u8 chip_id2;	/* 0x01 - CPLD Chip ID2 Register */
17 	u8 sw_maj_ver;	/* 0x02 - CPLD Code Major Version Register */
18 	u8 sw_min_ver;	/* 0x03 - CPLD Code Minor Version Register */
19 	u8 hw_ver;	/* 0x04 - PCBA Version Register */
20 	u8 software_on;	/* 0x05 - Override Physical Switch Enable Register */
21 	u8 cfg_rcw_src;	/* 0x06 - RCW Source Location Control Register */
22 	u8 res0;	/* 0x07 - not used */
23 	u8 vbank;	/* 0x08 - Flash Bank Selection Control Register */
24 	u8 sw1_sysclk;	/* 0x09 - SW1 Status Read Back Register */
25 	u8 sw2_status;	/* 0x0a - SW2 Status Read Back Register */
26 	u8 sw3_status;	/* 0x0b - SW3 Status Read Back Register */
27 	u8 sw4_status;	/* 0x0c - SW4 Status Read Back Register */
28 	u8 sys_reset;	/* 0x0d - Reset System With Reserving Registers Value*/
29 	u8 global_reset;/* 0x0e - Reset System With Default Registers Value */
30 	u8 res1;	/* 0x0f - not used */
31 };
32 
33 #define CPLD_BANK_SEL_MASK	0x07
34 #define CPLD_BANK_SEL_EN	0x04
35 #define CPLD_SYSTEM_RESET	0x01
36 #define CPLD_SELECT_BANK0	0x00
37 #define CPLD_SELECT_BANK4	0x04
38 #define CPLD_DEFAULT_BANK	0x01
39 
40 /* Pointer to the CPLD register set */
41 
42 u8 cpld_read(unsigned int reg);
43 void cpld_write(unsigned int reg, u8 value);
44 
45 #define CPLD_READ(reg) cpld_read(offsetof(struct cpld_data, reg))
46 #define CPLD_WRITE(reg, value) \
47 		cpld_write(offsetof(struct cpld_data, reg), value)
48 
49