xref: /rk3399_rockchip-uboot/board/freescale/common/qixis.c (revision 2ae4e8d9587a3ca9a642ff634c070f66235b571d)
1 /*
2  * Copyright 2011 Freescale Semiconductor
3  * Author: Shengzhou Liu <Shengzhou.Liu@freescale.com>
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License as published by the Free
7  * Software Foundation; either version 2 of the License, or (at your option)
8  * any later version.
9  *
10  * This file provides support for the QIXIS of some Freescale reference boards.
11  *
12  */
13 
14 #include <common.h>
15 #include <command.h>
16 #include <asm/io.h>
17 #include <linux/time.h>
18 #include "qixis.h"
19 
20 u8 qixis_read(unsigned int reg)
21 {
22 	void *p = (void *)QIXIS_BASE;
23 
24 	return in_8(p + reg);
25 }
26 
27 void qixis_write(unsigned int reg, u8 value)
28 {
29 	void *p = (void *)QIXIS_BASE;
30 
31 	out_8(p + reg, value);
32 }
33 
34 u16 qixis_read_minor(void)
35 {
36 	u16 minor;
37 
38 	/* this data is in little endian */
39 	QIXIS_WRITE(tagdata, 5);
40 	minor = QIXIS_READ(tagdata);
41 	QIXIS_WRITE(tagdata, 6);
42 	minor += QIXIS_READ(tagdata) << 8;
43 
44 	return minor;
45 }
46 
47 char *qixis_read_time(char *result)
48 {
49 	time_t time = 0;
50 	int i;
51 
52 	/* timestamp is in 32-bit big endian */
53 	for (i = 8; i <= 11; i++) {
54 		QIXIS_WRITE(tagdata, i);
55 		time =  (time << 8) + QIXIS_READ(tagdata);
56 	}
57 
58 	return ctime_r(&time, result);
59 }
60 
61 char *qixis_read_tag(char *buf)
62 {
63 	int i;
64 	char tag, *ptr = buf;
65 
66 	for (i = 16; i <= 63; i++) {
67 		QIXIS_WRITE(tagdata, i);
68 		tag = QIXIS_READ(tagdata);
69 		*(ptr++) = tag;
70 		if (!tag)
71 			break;
72 	}
73 	if (i > 63)
74 		*ptr = '\0';
75 
76 	return buf;
77 }
78 
79 void qixis_reset(void)
80 {
81 	QIXIS_WRITE(rst_ctl, QIXIS_RST_CTL_RESET);
82 }
83 
84 void qixis_bank_reset(void)
85 {
86 	QIXIS_WRITE(rcfg_ctl, QIXIS_RCFG_CTL_RECONFIG_IDLE);
87 	QIXIS_WRITE(rcfg_ctl, QIXIS_RCFG_CTL_RECONFIG_START);
88 }
89 
90 /* Set the boot bank to the power-on default bank */
91 void clear_altbank(void)
92 {
93 	u8 reg;
94 
95 	reg = QIXIS_READ(brdcfg[0]);
96 	reg = (reg & ~QIXIS_LBMAP_MASK) | QIXIS_LBMAP_DFLTBANK;
97 	QIXIS_WRITE(brdcfg[0], reg);
98 }
99 
100 /* Set the boot bank to the alternate bank */
101 void set_altbank(void)
102 {
103 	u8 reg;
104 
105 	reg = QIXIS_READ(brdcfg[0]);
106 	reg = (reg & ~QIXIS_LBMAP_MASK) | QIXIS_LBMAP_ALTBANK;
107 	QIXIS_WRITE(brdcfg[0], reg);
108 }
109 
110 #ifdef DEBUG
111 static void qixis_dump_regs(void)
112 {
113 	int i;
114 
115 	printf("id	= %02x\n", QIXIS_READ(id));
116 	printf("arch	= %02x\n", QIXIS_READ(arch));
117 	printf("scver	= %02x\n", QIXIS_READ(scver));
118 	printf("model	= %02x\n", QIXIS_READ(model));
119 	printf("rst_ctl	= %02x\n", QIXIS_READ(rst_ctl));
120 	printf("aux	= %02x\n", QIXIS_READ(aux));
121 	for (i = 0; i < 16; i++)
122 		printf("brdcfg%02d = %02x\n", i, QIXIS_READ(brdcfg[i]));
123 	for (i = 0; i < 16; i++)
124 		printf("dutcfg%02d = %02x\n", i, QIXIS_READ(dutcfg[i]));
125 	printf("sclk	= %02x%02x%02x\n", QIXIS_READ(sclk[0]),
126 		QIXIS_READ(sclk[1]), QIXIS_READ(sclk[2]));
127 	printf("dclk	= %02x%02x%02x\n", QIXIS_READ(dclk[0]),
128 		QIXIS_READ(dclk[1]), QIXIS_READ(dclk[2]));
129 	printf("aux     = %02x\n", QIXIS_READ(aux));
130 	printf("watch	= %02x\n", QIXIS_READ(watch));
131 	printf("ctl_sys	= %02x\n", QIXIS_READ(ctl_sys));
132 	printf("rcw_ctl = %02x\n", QIXIS_READ(rcw_ctl));
133 	printf("present = %02x\n", QIXIS_READ(present));
134 	printf("present2 = %02x\n", QIXIS_READ(present2));
135 	printf("clk_spd = %02x\n", QIXIS_READ(clk_spd));
136 	printf("stat_dut = %02x\n", QIXIS_READ(stat_dut));
137 	printf("stat_sys = %02x\n", QIXIS_READ(stat_sys));
138 	printf("stat_alrm = %02x\n", QIXIS_READ(stat_alrm));
139 }
140 #endif
141 
142 int qixis_reset_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
143 {
144 	int i;
145 
146 	if (argc <= 1) {
147 		clear_altbank();
148 		qixis_reset();
149 	} else if (strcmp(argv[1], "altbank") == 0) {
150 		set_altbank();
151 		qixis_bank_reset();
152 	} else if (strcmp(argv[1], "watchdog") == 0) {
153 		static char *period[9] = {"2s", "4s", "8s", "16s", "32s",
154 					  "1min", "2min", "4min", "8min"};
155 		u8 rcfg = QIXIS_READ(rcfg_ctl);
156 
157 		if (argv[2] == NULL) {
158 			printf("qixis watchdog <watchdog_period>\n");
159 			return 0;
160 		}
161 		for (i = 0; i < ARRAY_SIZE(period); i++) {
162 			if (strcmp(argv[2], period[i]) == 0) {
163 				/* disable watchdog */
164 				QIXIS_WRITE(rcfg_ctl,
165 					rcfg & ~QIXIS_RCFG_CTL_WATCHDOG_ENBLE);
166 				QIXIS_WRITE(watch, ((i<<2) - 1));
167 				QIXIS_WRITE(rcfg_ctl, rcfg);
168 				return 0;
169 			}
170 		}
171 	}
172 
173 #ifdef DEBUG
174 	else if (strcmp(argv[1], "dump") == 0) {
175 		qixis_dump_regs();
176 		return 0;
177 	}
178 #endif
179 
180 	else {
181 		printf("Invalid option: %s\n", argv[1]);
182 		return 1;
183 	}
184 
185 	return 0;
186 }
187 
188 U_BOOT_CMD(
189 	qixis_reset, CONFIG_SYS_MAXARGS, 1, qixis_reset_cmd,
190 	"Reset the board using the FPGA sequencer",
191 	"- hard reset to default bank\n"
192 	"qixis_reset altbank - reset to alternate bank\n"
193 	"qixis watchdog <watchdog_period> - set the watchdog period\n"
194 	"	period: 1s 2s 4s 8s 16s 32s 1min 2min 4min 8min\n"
195 #ifdef DEBUG
196 	"qixis_reset dump - display the QIXIS registers\n"
197 #endif
198 	);
199