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
|
/*
* (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 <asm/arch/imx_spi.h>
static u32 pmic_tx, pmic_rx;
/*!
* To read/write to a PMIC register. For write, it does another read for the
* actual register value.
*
* @param reg register number inside the PMIC
* @param val data to be written to the register; don't care for read
* @param write 0 for read; 1 for write
*
* @return the actual data in the PMIC register
*/
u32 pmic_reg(struct spi_slave *slave, u32 reg, u32 val, u32 write)
{
if (!slave)
return 0;
if (reg > 63 || write > 1) {
printf("<reg num> = %d is invalide. Should be less then 63\n",
reg);
return 0;
}
pmic_tx = (write << 31) | (reg << 25) | (val & 0x00FFFFFF);
debug("reg=0x%x, val=0x%08x\n", reg, pmic_tx);
if (spi_xfer(slave, 4 << 3, (u8 *)&pmic_tx, (u8 *)&pmic_rx,
SPI_XFER_BEGIN | SPI_XFER_END)) {
return -1;
}
if (write) {
pmic_tx &= ~(1 << 31);
if (spi_xfer(slave, 4 << 3, (u8 *)&pmic_tx, (u8 *)&pmic_rx,
SPI_XFER_BEGIN | SPI_XFER_END)) {
return -1;
}
}
return pmic_rx;
}
void show_pmic_info(struct spi_slave *slave)
{
volatile u32 rev_id;
if (!slave)
return;
rev_id = pmic_reg(slave, 7, 0, 0);
debug("PMIC ID: 0x%08x [Rev: ", rev_id);
switch (rev_id & 0x1F) {
case 0x1:
printf("1.0");
break;
case 0x9:
printf("1.1");
break;
case 0xA:
printf("1.2");
break;
case 0x10:
printf("2.0");
break;
case 0x11:
printf("2.1");
break;
case 0x18:
printf("3.0");
break;
case 0x19:
printf("3.1");
break;
case 0x1A:
printf("3.2");
break;
case 0x2:
printf("3.2A");
break;
case 0x1B:
printf("3.3");
break;
case 0x1D:
printf("3.5");
break;
default:
printf("unknown");
break;
}
printf("]\n");
}
struct spi_slave *spi_pmic_probe(void)
{
return spi_setup_slave(0, CONFIG_IMX_SPI_PMIC_CS, 2500000, 0);
}
void spi_pmic_free(struct spi_slave *slave)
{
if (slave)
spi_free_slave(slave);
}
|
