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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 87ea2c0ff345ad59280bdf4702c3450a81e3c265 / . / board / keymile / kmp204x / qrio.c
blob: 49f9aa2546242d421d45d5ec47af1ab05f38260d [file] [log] [blame]
Valentin Longchamp87ea2c02014-01-27 11:49:05 +0100[diff] [blame^]1/*
2 * (C) Copyright 2013 Keymile AG
3 * Valentin Longchamp <valentin.longchamp@keymile.com>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8#include <common.h>
9
10#include "../common/common.h"
11#include "kmp204x.h"
12
13/* QRIO GPIO register offsets */
14#define DIRECT_OFF 0x18
15#define GPRT_OFF 0x1c
16
17int qrio_get_gpio(u8 port_off, u8 gpio_nr)
18{
19 u32 gprt;
20
21 void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
22
23 gprt = in_be32(qrio_base + port_off + GPRT_OFF);
24
25 return (gprt >> gpio_nr) & 1U;
26}
27
28void qrio_set_gpio(u8 port_off, u8 gpio_nr, bool value)
29{
30 u32 gprt, mask;
31
32 void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
33
34 mask = 1U << gpio_nr;
35
36 gprt = in_be32(qrio_base + port_off + GPRT_OFF);
37 if (value)
38 gprt |= mask;
39 else
40 gprt &= ~mask;
41
42 out_be32(qrio_base + port_off + GPRT_OFF, gprt);
43}
44
45void qrio_gpio_direction_output(u8 port_off, u8 gpio_nr, bool value)
46{
47 u32 direct, mask;
48
49 void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
50
51 mask = 1U << gpio_nr;
52
53 direct = in_be32(qrio_base + port_off + DIRECT_OFF);
54 direct |= mask;
55 out_be32(qrio_base + port_off + DIRECT_OFF, direct);
56
57 qrio_set_gpio(port_off, gpio_nr, value);
58}
59
60void qrio_gpio_direction_input(u8 port_off, u8 gpio_nr)
61{
62 u32 direct, mask;
63
64 void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
65
66 mask = 1U << gpio_nr;
67
68 direct = in_be32(qrio_base + port_off + DIRECT_OFF);
69 direct &= ~mask;
70 out_be32(qrio_base + port_off + DIRECT_OFF, direct);
71}
72
73void qrio_set_opendrain_gpio(u8 port_off, u8 gpio_nr, u8 val)
74{
75 u32 direct, mask;
76
77 void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
78
79 mask = 1U << gpio_nr;
80
81 direct = in_be32(qrio_base + port_off + DIRECT_OFF);
82 if (val == 0)
83 /* set to output -> GPIO drives low */
84 direct |= mask;
85 else
86 /* set to input -> GPIO floating */
87 direct &= ~mask;
88
89 out_be32(qrio_base + port_off + DIRECT_OFF, direct);
90}
91
92#define WDMASK_OFF 0x16
93
94static void qrio_wdmask(u8 bit, bool wden)
95{
96 u16 wdmask;
97 void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
98
99 wdmask = in_be16(qrio_base + WDMASK_OFF);
100
101 if (wden)
102 wdmask |= (1 << bit);
103 else
104 wdmask &= ~(1 << bit);
105
106 out_be16(qrio_base + WDMASK_OFF, wdmask);
107}
108
109#define PRST_OFF 0x1a
110
111void qrio_prst(u8 bit, bool en, bool wden)
112{
113 u16 prst;
114 void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
115
116 qrio_wdmask(bit, wden);
117
118 prst = in_be16(qrio_base + PRST_OFF);
119
120 if (en)
121 prst &= ~(1 << bit);
122 else
123 prst |= (1 << bit);
124
125 out_be16(qrio_base + PRST_OFF, prst);
126}
127
128#define PRSTCFG_OFF 0x1c
129
130void qrio_prstcfg(u8 bit, u8 mode)
131{
132 u32 prstcfg;
133 u8 i;
134 void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
135
136 prstcfg = in_be32(qrio_base + PRSTCFG_OFF);
137
138 for (i = 0; i < 2; i++) {
139 if (mode & (1<<i))
140 set_bit(2*bit+i, &prstcfg);
141 else
142 clear_bit(2*bit+i, &prstcfg);
143 }
144
145 out_be32(qrio_base + PRSTCFG_OFF, prstcfg);
146}