1 // SPDX-License-Identifier: GPL-2.0+
2 /**
3 * Copyright 2014 Freescale Semiconductor
4 *
5 * This file provides support for the board-specific CPLD used on some Freescale
6 * reference boards.
7 *
8 * The following macros need to be defined:
9 *
10 * CONFIG_SYS_CPLD_BASE-The virtual address of the base of the CPLD register map
11 */
12
13 #include <common.h>
14 #include <command.h>
15 #include <asm/io.h>
16
17 #include "cpld.h"
18
cpld_read(unsigned int reg)19 u8 cpld_read(unsigned int reg)
20 {
21 void *p = (void *)CONFIG_SYS_CPLD_BASE;
22
23 return in_8(p + reg);
24 }
25
cpld_write(unsigned int reg,u8 value)26 void cpld_write(unsigned int reg, u8 value)
27 {
28 void *p = (void *)CONFIG_SYS_CPLD_BASE;
29
30 out_8(p + reg, value);
31 }
32
33 /**
34 * Set the boot bank to the alternate bank
35 */
cpld_set_altbank(void)36 void cpld_set_altbank(void)
37 {
38 u8 reg = CPLD_READ(flash_ctl_status);
39
40 reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_ALTBANK;
41
42 CPLD_WRITE(flash_ctl_status, reg);
43 CPLD_WRITE(reset_ctl1, CPLD_LBMAP_RESET);
44 }
45
46 /**
47 * Set the boot bank to the default bank
48 */
cpld_set_defbank(void)49 void cpld_set_defbank(void)
50 {
51 u8 reg = CPLD_READ(flash_ctl_status);
52
53 reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_DFLTBANK;
54
55 CPLD_WRITE(flash_ctl_status, reg);
56 CPLD_WRITE(reset_ctl1, CPLD_LBMAP_RESET);
57 }
58
59 #ifdef DEBUG
cpld_dump_regs(void)60 static void cpld_dump_regs(void)
61 {
62 printf("cpld_ver = 0x%02x\n", CPLD_READ(cpld_ver));
63 printf("cpld_ver_sub = 0x%02x\n", CPLD_READ(cpld_ver_sub));
64 printf("hw_ver = 0x%02x\n", CPLD_READ(hw_ver));
65 printf("sw_ver = 0x%02x\n", CPLD_READ(sw_ver));
66 printf("reset_ctl1 = 0x%02x\n", CPLD_READ(reset_ctl1));
67 printf("reset_ctl2 = 0x%02x\n", CPLD_READ(reset_ctl2));
68 printf("int_status = 0x%02x\n", CPLD_READ(int_status));
69 printf("flash_ctl_status = 0x%02x\n", CPLD_READ(flash_ctl_status));
70 printf("fan_ctl_status = 0x%02x\n", CPLD_READ(fan_ctl_status));
71 #if defined(CONFIG_TARGET_T1040D4D4RDB) || defined(CONFIG_TARGET_T1042D4RDB)
72 printf("int_mask = 0x%02x\n", CPLD_READ(int_mask));
73 #else
74 printf("led_ctl_status = 0x%02x\n", CPLD_READ(led_ctl_status));
75 #endif
76 printf("sfp_ctl_status = 0x%02x\n", CPLD_READ(sfp_ctl_status));
77 printf("misc_ctl_status = 0x%02x\n", CPLD_READ(misc_ctl_status));
78 printf("boot_override = 0x%02x\n", CPLD_READ(boot_override));
79 printf("boot_config1 = 0x%02x\n", CPLD_READ(boot_config1));
80 printf("boot_config2 = 0x%02x\n", CPLD_READ(boot_config2));
81 putc('\n');
82 }
83 #endif
84
do_cpld(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])85 int do_cpld(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
86 {
87 int rc = 0;
88
89 if (argc <= 1)
90 return cmd_usage(cmdtp);
91
92 if (strcmp(argv[1], "reset") == 0) {
93 if (strcmp(argv[2], "altbank") == 0)
94 cpld_set_altbank();
95 else
96 cpld_set_defbank();
97 #ifdef DEBUG
98 } else if (strcmp(argv[1], "dump") == 0) {
99 cpld_dump_regs();
100 #endif
101 } else
102 rc = cmd_usage(cmdtp);
103
104 return rc;
105 }
106
107 U_BOOT_CMD(
108 cpld, CONFIG_SYS_MAXARGS, 1, do_cpld,
109 "Reset the board or alternate bank",
110 "reset - hard reset to default bank\n"
111 "cpld reset altbank - reset to alternate bank\n"
112 #ifdef DEBUG
113 "cpld dump - display the CPLD registers\n"
114 #endif
115 );
116