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
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2020 Samsung Electronics Co., Ltd.
* Copyright 2020 Google LLC.
* Copyright 2024 Linaro Ltd.
*/
#include <linux/bitfield.h>
#include <linux/firmware/samsung/exynos-acpm-protocol.h>
#include <linux/ktime.h>
#include <linux/types.h>
#include "exynos-acpm.h"
#include "exynos-acpm-pmic.h"
#define ACPM_PMIC_CHANNEL GENMASK(15, 12)
#define ACPM_PMIC_TYPE GENMASK(11, 8)
#define ACPM_PMIC_REG GENMASK(7, 0)
#define ACPM_PMIC_RETURN GENMASK(31, 24)
#define ACPM_PMIC_MASK GENMASK(23, 16)
#define ACPM_PMIC_VALUE GENMASK(15, 8)
#define ACPM_PMIC_FUNC GENMASK(7, 0)
#define ACPM_PMIC_BULK_SHIFT 8
#define ACPM_PMIC_BULK_MASK GENMASK(7, 0)
#define ACPM_PMIC_BULK_MAX_COUNT 8
enum exynos_acpm_pmic_func {
ACPM_PMIC_READ,
ACPM_PMIC_WRITE,
ACPM_PMIC_UPDATE,
ACPM_PMIC_BULK_READ,
ACPM_PMIC_BULK_WRITE,
};
static inline u32 acpm_pmic_set_bulk(u32 data, unsigned int i)
{
return (data & ACPM_PMIC_BULK_MASK) << (ACPM_PMIC_BULK_SHIFT * i);
}
static inline u32 acpm_pmic_get_bulk(u32 data, unsigned int i)
{
return (data >> (ACPM_PMIC_BULK_SHIFT * i)) & ACPM_PMIC_BULK_MASK;
}
static void acpm_pmic_set_xfer(struct acpm_xfer *xfer, u32 *cmd, size_t cmdlen,
unsigned int acpm_chan_id)
{
xfer->txd = cmd;
xfer->rxd = cmd;
xfer->txlen = cmdlen;
xfer->rxlen = cmdlen;
xfer->acpm_chan_id = acpm_chan_id;
}
static void acpm_pmic_init_read_cmd(u32 cmd[4], u8 type, u8 reg, u8 chan)
{
cmd[0] = FIELD_PREP(ACPM_PMIC_TYPE, type) |
FIELD_PREP(ACPM_PMIC_REG, reg) |
FIELD_PREP(ACPM_PMIC_CHANNEL, chan);
cmd[1] = FIELD_PREP(ACPM_PMIC_FUNC, ACPM_PMIC_READ);
cmd[3] = ktime_to_ms(ktime_get());
}
int acpm_pmic_read_reg(const struct acpm_handle *handle,
unsigned int acpm_chan_id, u8 type, u8 reg, u8 chan,
u8 *buf)
{
struct acpm_xfer xfer;
u32 cmd[4] = {0};
int ret;
acpm_pmic_init_read_cmd(cmd, type, reg, chan);
acpm_pmic_set_xfer(&xfer, cmd, sizeof(cmd), acpm_chan_id);
ret = acpm_do_xfer(handle, &xfer);
if (ret)
return ret;
*buf = FIELD_GET(ACPM_PMIC_VALUE, xfer.rxd[1]);
return FIELD_GET(ACPM_PMIC_RETURN, xfer.rxd[1]);
}
static void acpm_pmic_init_bulk_read_cmd(u32 cmd[4], u8 type, u8 reg, u8 chan,
u8 count)
{
cmd[0] = FIELD_PREP(ACPM_PMIC_TYPE, type) |
FIELD_PREP(ACPM_PMIC_REG, reg) |
FIELD_PREP(ACPM_PMIC_CHANNEL, chan);
cmd[1] = FIELD_PREP(ACPM_PMIC_FUNC, ACPM_PMIC_BULK_READ) |
FIELD_PREP(ACPM_PMIC_VALUE, count);
}
int acpm_pmic_bulk_read(const struct acpm_handle *handle,
unsigned int acpm_chan_id, u8 type, u8 reg, u8 chan,
u8 count, u8 *buf)
{
struct acpm_xfer xfer;
u32 cmd[4] = {0};
int i, ret;
if (count > ACPM_PMIC_BULK_MAX_COUNT)
return -EINVAL;
acpm_pmic_init_bulk_read_cmd(cmd, type, reg, chan, count);
acpm_pmic_set_xfer(&xfer, cmd, sizeof(cmd), acpm_chan_id);
ret = acpm_do_xfer(handle, &xfer);
if (ret)
return ret;
ret = FIELD_GET(ACPM_PMIC_RETURN, xfer.rxd[1]);
if (ret)
return ret;
for (i = 0; i < count; i++) {
if (i < 4)
buf[i] = acpm_pmic_get_bulk(xfer.rxd[2], i);
else
buf[i] = acpm_pmic_get_bulk(xfer.rxd[3], i - 4);
}
return 0;
}
static void acpm_pmic_init_write_cmd(u32 cmd[4], u8 type, u8 reg, u8 chan,
u8 value)
{
cmd[0] = FIELD_PREP(ACPM_PMIC_TYPE, type) |
FIELD_PREP(ACPM_PMIC_REG, reg) |
FIELD_PREP(ACPM_PMIC_CHANNEL, chan);
cmd[1] = FIELD_PREP(ACPM_PMIC_FUNC, ACPM_PMIC_WRITE) |
FIELD_PREP(ACPM_PMIC_VALUE, value);
cmd[3] = ktime_to_ms(ktime_get());
}
int acpm_pmic_write_reg(const struct acpm_handle *handle,
unsigned int acpm_chan_id, u8 type, u8 reg, u8 chan,
u8 value)
{
struct acpm_xfer xfer;
u32 cmd[4] = {0};
int ret;
acpm_pmic_init_write_cmd(cmd, type, reg, chan, value);
acpm_pmic_set_xfer(&xfer, cmd, sizeof(cmd), acpm_chan_id);
ret = acpm_do_xfer(handle, &xfer);
if (ret)
return ret;
return FIELD_GET(ACPM_PMIC_RETURN, xfer.rxd[1]);
}
static void acpm_pmic_init_bulk_write_cmd(u32 cmd[4], u8 type, u8 reg, u8 chan,
u8 count, const u8 *buf)
{
int i;
cmd[0] = FIELD_PREP(ACPM_PMIC_TYPE, type) |
FIELD_PREP(ACPM_PMIC_REG, reg) |
FIELD_PREP(ACPM_PMIC_CHANNEL, chan);
cmd[1] = FIELD_PREP(ACPM_PMIC_FUNC, ACPM_PMIC_BULK_WRITE) |
FIELD_PREP(ACPM_PMIC_VALUE, count);
for (i = 0; i < count; i++) {
if (i < 4)
cmd[2] |= acpm_pmic_set_bulk(buf[i], i);
else
cmd[3] |= acpm_pmic_set_bulk(buf[i], i - 4);
}
}
int acpm_pmic_bulk_write(const struct acpm_handle *handle,
unsigned int acpm_chan_id, u8 type, u8 reg, u8 chan,
u8 count, const u8 *buf)
{
struct acpm_xfer xfer;
u32 cmd[4] = {0};
int ret;
if (count > ACPM_PMIC_BULK_MAX_COUNT)
return -EINVAL;
acpm_pmic_init_bulk_write_cmd(cmd, type, reg, chan, count, buf);
acpm_pmic_set_xfer(&xfer, cmd, sizeof(cmd), acpm_chan_id);
ret = acpm_do_xfer(handle, &xfer);
if (ret)
return ret;
return FIELD_GET(ACPM_PMIC_RETURN, xfer.rxd[1]);
}
static void acpm_pmic_init_update_cmd(u32 cmd[4], u8 type, u8 reg, u8 chan,
u8 value, u8 mask)
{
cmd[0] = FIELD_PREP(ACPM_PMIC_TYPE, type) |
FIELD_PREP(ACPM_PMIC_REG, reg) |
FIELD_PREP(ACPM_PMIC_CHANNEL, chan);
cmd[1] = FIELD_PREP(ACPM_PMIC_FUNC, ACPM_PMIC_UPDATE) |
FIELD_PREP(ACPM_PMIC_VALUE, value) |
FIELD_PREP(ACPM_PMIC_MASK, mask);
cmd[3] = ktime_to_ms(ktime_get());
}
int acpm_pmic_update_reg(const struct acpm_handle *handle,
unsigned int acpm_chan_id, u8 type, u8 reg, u8 chan,
u8 value, u8 mask)
{
struct acpm_xfer xfer;
u32 cmd[4] = {0};
int ret;
acpm_pmic_init_update_cmd(cmd, type, reg, chan, value, mask);
acpm_pmic_set_xfer(&xfer, cmd, sizeof(cmd), acpm_chan_id);
ret = acpm_do_xfer(handle, &xfer);
if (ret)
return ret;
return FIELD_GET(ACPM_PMIC_RETURN, xfer.rxd[1]);
}
|
