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8#include <common.h>
9#include <command.h>
10#include <asm/io.h>
11#include "cpld.h"
12
13u8 cpld_read(unsigned int reg)
14{
15 void *p = (void *)CFG_SYS_CPLD_BASE;
16
17 return in_8(p + reg);
18}
19
20void cpld_write(unsigned int reg, u8 value)
21{
22 void *p = (void *)CFG_SYS_CPLD_BASE;
23
24 out_8(p + reg, value);
25}
26
27
28void cpld_set_altbank(void)
29{
30 u16 reg = CPLD_CFG_RCW_SRC_NOR;
31 u8 reg4 = CPLD_READ(soft_mux_on);
32 u8 reg5 = (u8)(reg >> 1);
33 u8 reg6 = (u8)(reg & 1);
34 u8 reg7 = CPLD_READ(vbank);
35
36 cpld_rev_bit(®5);
37
38 CPLD_WRITE(soft_mux_on, reg4 | CPLD_SW_MUX_BANK_SEL | 1);
39
40 CPLD_WRITE(cfg_rcw_src1, reg5);
41 CPLD_WRITE(cfg_rcw_src2, reg6);
42
43 reg7 = (reg7 & ~CPLD_BANK_SEL_MASK) | CPLD_BANK_SEL_ALTBANK;
44 CPLD_WRITE(vbank, reg7);
45
46 CPLD_WRITE(system_rst, 1);
47}
48
49
50void cpld_set_defbank(void)
51{
52 u16 reg = CPLD_CFG_RCW_SRC_NOR;
53 u8 reg4 = CPLD_READ(soft_mux_on);
54 u8 reg5 = (u8)(reg >> 1);
55 u8 reg6 = (u8)(reg & 1);
56
57 cpld_rev_bit(®5);
58
59 CPLD_WRITE(soft_mux_on, reg4 | CPLD_SW_MUX_BANK_SEL | 1);
60
61 CPLD_WRITE(cfg_rcw_src1, reg5);
62 CPLD_WRITE(cfg_rcw_src2, reg6);
63
64 CPLD_WRITE(vbank, 0);
65
66 CPLD_WRITE(system_rst, 1);
67}
68
69void cpld_set_nand(void)
70{
71 u16 reg = CPLD_CFG_RCW_SRC_NAND;
72
73 if (CPLD_READ(cpld_ver) > 0x2)
74 reg = CPLD_CFG_RCW_SRC_NAND_4K;
75
76 u8 reg5 = (u8)(reg >> 1);
77 u8 reg6 = (u8)(reg & 1);
78
79 cpld_rev_bit(®5);
80
81 CPLD_WRITE(soft_mux_on, 1);
82
83 CPLD_WRITE(cfg_rcw_src1, reg5);
84 CPLD_WRITE(cfg_rcw_src2, reg6);
85
86 CPLD_WRITE(system_rst, 1);
87}
88
89void cpld_set_sd(void)
90{
91 u16 reg = CPLD_CFG_RCW_SRC_SD;
92 u8 reg5 = (u8)(reg >> 1);
93 u8 reg6 = (u8)(reg & 1);
94
95 cpld_rev_bit(®5);
96
97 CPLD_WRITE(soft_mux_on, 1);
98
99 CPLD_WRITE(cfg_rcw_src1, reg5);
100 CPLD_WRITE(cfg_rcw_src2, reg6);
101
102 CPLD_WRITE(system_rst, 1);
103}
104#ifdef DEBUG
105static void cpld_dump_regs(void)
106{
107 printf("cpld_ver = %x\n", CPLD_READ(cpld_ver));
108 printf("cpld_ver_sub = %x\n", CPLD_READ(cpld_ver_sub));
109 printf("pcba_ver = %x\n", CPLD_READ(pcba_ver));
110 printf("soft_mux_on = %x\n", CPLD_READ(soft_mux_on));
111 printf("cfg_rcw_src1 = %x\n", CPLD_READ(cfg_rcw_src1));
112 printf("cfg_rcw_src2 = %x\n", CPLD_READ(cfg_rcw_src2));
113 printf("vbank = %x\n", CPLD_READ(vbank));
114 printf("sysclk_sel = %x\n", CPLD_READ(sysclk_sel));
115 printf("uart_sel = %x\n", CPLD_READ(uart_sel));
116 printf("sd1refclk_sel = %x\n", CPLD_READ(sd1refclk_sel));
117 printf("tdmclk_mux_sel = %x\n", CPLD_READ(tdmclk_mux_sel));
118 printf("sdhc_spics_sel = %x\n", CPLD_READ(sdhc_spics_sel));
119 printf("status_led = %x\n", CPLD_READ(status_led));
120 putc('\n');
121}
122#endif
123
124void cpld_rev_bit(unsigned char *value)
125{
126 u8 rev_val, val;
127 int i;
128
129 val = *value;
130 rev_val = val & 1;
131 for (i = 1; i <= 7; i++) {
132 val >>= 1;
133 rev_val <<= 1;
134 rev_val |= val & 1;
135 }
136
137 *value = rev_val;
138}
139
140int do_cpld(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
141{
142 int rc = 0;
143
144 if (argc <= 1)
145 return cmd_usage(cmdtp);
146
147 if (strcmp(argv[1], "reset") == 0) {
148 if (strcmp(argv[2], "altbank") == 0)
149 cpld_set_altbank();
150 else if (strcmp(argv[2], "nand") == 0)
151 cpld_set_nand();
152 else if (strcmp(argv[2], "sd") == 0)
153 cpld_set_sd();
154 else
155 cpld_set_defbank();
156#ifdef DEBUG
157 } else if (strcmp(argv[1], "dump") == 0) {
158 cpld_dump_regs();
159#endif
160 } else {
161 rc = cmd_usage(cmdtp);
162 }
163
164 return rc;
165}
166
167U_BOOT_CMD(
168 cpld, CONFIG_SYS_MAXARGS, 1, do_cpld,
169 "Reset the board or alternate bank",
170 "reset: reset to default bank\n"
171 "cpld reset altbank: reset to alternate bank\n"
172 "cpld reset nand: reset to boot from NAND flash\n"
173 "cpld reset sd: reset to boot from SD card\n"
174#ifdef DEBUG
175 "cpld dump - display the CPLD registers\n"
176#endif
177);
178