1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
/*
* (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <config.h>
#include <common.h>
#include <spi.h>
#include <asm/errno.h>
#include <linux/types.h>
#include <fsl_pmic.h>
static struct spi_slave *slave;
struct spi_slave *pmic_spi_probe(void)
{
return spi_setup_slave(CONFIG_FSL_PMIC_BUS,
CONFIG_FSL_PMIC_CS,
CONFIG_FSL_PMIC_CLK,
CONFIG_FSL_PMIC_MODE);
}
void pmic_spi_free(struct spi_slave *slave)
{
if (slave)
spi_free_slave(slave);
}
u32 pmic_reg(u32 reg, u32 val, u32 write)
{
u32 pmic_tx, pmic_rx;
u32 tmp;
if (!slave) {
slave = pmic_spi_probe();
if (!slave)
return -1;
}
if (reg > 63 || write > 1) {
printf("<reg num> = %d is invalid. Should be less then 63\n",
reg);
return -1;
}
if (spi_claim_bus(slave))
return -1;
pmic_tx = (write << 31) | (reg << 25) | (val & 0x00FFFFFF);
tmp = cpu_to_be32(pmic_tx);
if (spi_xfer(slave, 4 << 3, &tmp, &pmic_rx,
SPI_XFER_BEGIN | SPI_XFER_END)) {
spi_release_bus(slave);
return -1;
}
if (write) {
pmic_tx &= ~(1 << 31);
tmp = cpu_to_be32(pmic_tx);
if (spi_xfer(slave, 4 << 3, &tmp, &pmic_rx,
SPI_XFER_BEGIN | SPI_XFER_END)) {
spi_release_bus(slave);
return -1;
}
}
spi_release_bus(slave);
return cpu_to_be32(pmic_rx);
}
void pmic_reg_write(u32 reg, u32 value)
{
pmic_reg(reg, value, 1);
}
u32 pmic_reg_read(u32 reg)
{
return pmic_reg(reg, 0, 0);
}
void pmic_show_pmic_info(void)
{
u32 rev_id;
rev_id = pmic_reg_read(REG_IDENTIFICATION);
printf("PMIC ID: 0x%08x [Rev: ", rev_id);
switch (rev_id & 0x1F) {
case 0x1:
puts("1.0");
break;
case 0x9:
puts("1.1");
break;
case 0xA:
puts("1.2");
break;
case 0x10:
puts("2.0");
break;
case 0x11:
puts("2.1");
break;
case 0x18:
puts("3.0");
break;
case 0x19:
puts("3.1");
break;
case 0x1A:
puts("3.2");
break;
case 0x2:
puts("3.2A");
break;
case 0x1B:
puts("3.3");
break;
case 0x1D:
puts("3.5");
break;
default:
puts("unknown");
break;
}
puts("]\n");
}
static void pmic_dump(int numregs)
{
u32 val;
int i;
pmic_show_pmic_info();
for (i = 0; i < numregs; i++) {
val = pmic_reg_read(i);
if (!(i % 8))
printf ("\n0x%02x: ", i);
printf("%08x ", val);
}
puts("\n");
}
int do_pmic(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
char *cmd;
int nregs;
u32 val;
/* at least two arguments please */
if (argc < 2)
return cmd_usage(cmdtp);
cmd = argv[1];
if (strcmp(cmd, "dump") == 0) {
if (argc < 3)
return cmd_usage(cmdtp);
nregs = simple_strtoul(argv[2], NULL, 16);
pmic_dump(nregs);
return 0;
}
if (strcmp(cmd, "write") == 0) {
if (argc < 4)
return cmd_usage(cmdtp);
nregs = simple_strtoul(argv[2], NULL, 16);
val = simple_strtoul(argv[3], NULL, 16);
pmic_reg_write(nregs, val);
return 0;
}
/* No subcommand found */
return 1;
}
U_BOOT_CMD(
pmic, CONFIG_SYS_MAXARGS, 1, do_pmic,
"Freescale PMIC (Atlas)",
"dump [numregs] dump registers\n"
"pmic write <reg> <value> - write register"
);
|
