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
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
// SPDX-License-Identifier: GPL-2.0+
/*
* NEC NL8048HL11 Panel Driver
*
* Copyright (C) 2019 Texas Instruments Incorporated
*
* Based on the omapdrm-specific panel-nec-nl8048hl11 driver
*
* Copyright (C) 2010 Texas Instruments Incorporated
* Author: Erik Gilling <konkers@android.com>
*/
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/spi/spi.h>
#include <drm/drm_connector.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
struct nl8048_panel {
struct drm_panel panel;
struct spi_device *spi;
struct gpio_desc *reset_gpio;
};
#define to_nl8048_device(p) container_of(p, struct nl8048_panel, panel)
static int nl8048_write(struct nl8048_panel *lcd, unsigned char addr,
unsigned char value)
{
u8 data[4] = { value, 0x01, addr, 0x00 };
int ret;
ret = spi_write(lcd->spi, data, sizeof(data));
if (ret)
dev_err(&lcd->spi->dev, "SPI write to %u failed: %d\n",
addr, ret);
return ret;
}
static int nl8048_init(struct nl8048_panel *lcd)
{
static const struct {
unsigned char addr;
unsigned char data;
} nl8048_init_seq[] = {
{ 3, 0x01 }, { 0, 0x00 }, { 1, 0x01 }, { 4, 0x00 },
{ 5, 0x14 }, { 6, 0x24 }, { 16, 0xd7 }, { 17, 0x00 },
{ 18, 0x00 }, { 19, 0x55 }, { 20, 0x01 }, { 21, 0x70 },
{ 22, 0x1e }, { 23, 0x25 }, { 24, 0x25 }, { 25, 0x02 },
{ 26, 0x02 }, { 27, 0xa0 }, { 32, 0x2f }, { 33, 0x0f },
{ 34, 0x0f }, { 35, 0x0f }, { 36, 0x0f }, { 37, 0x0f },
{ 38, 0x0f }, { 39, 0x00 }, { 40, 0x02 }, { 41, 0x02 },
{ 42, 0x02 }, { 43, 0x0f }, { 44, 0x0f }, { 45, 0x0f },
{ 46, 0x0f }, { 47, 0x0f }, { 48, 0x0f }, { 49, 0x0f },
{ 50, 0x00 }, { 51, 0x02 }, { 52, 0x02 }, { 53, 0x02 },
{ 80, 0x0c }, { 83, 0x42 }, { 84, 0x42 }, { 85, 0x41 },
{ 86, 0x14 }, { 89, 0x88 }, { 90, 0x01 }, { 91, 0x00 },
{ 92, 0x02 }, { 93, 0x0c }, { 94, 0x1c }, { 95, 0x27 },
{ 98, 0x49 }, { 99, 0x27 }, { 102, 0x76 }, { 103, 0x27 },
{ 112, 0x01 }, { 113, 0x0e }, { 114, 0x02 }, { 115, 0x0c },
{ 118, 0x0c }, { 121, 0x30 }, { 130, 0x00 }, { 131, 0x00 },
{ 132, 0xfc }, { 134, 0x00 }, { 136, 0x00 }, { 138, 0x00 },
{ 139, 0x00 }, { 140, 0x00 }, { 141, 0xfc }, { 143, 0x00 },
{ 145, 0x00 }, { 147, 0x00 }, { 148, 0x00 }, { 149, 0x00 },
{ 150, 0xfc }, { 152, 0x00 }, { 154, 0x00 }, { 156, 0x00 },
{ 157, 0x00 },
};
unsigned int i;
int ret;
for (i = 0; i < ARRAY_SIZE(nl8048_init_seq); ++i) {
ret = nl8048_write(lcd, nl8048_init_seq[i].addr,
nl8048_init_seq[i].data);
if (ret < 0)
return ret;
}
udelay(20);
return nl8048_write(lcd, 2, 0x00);
}
static int nl8048_disable(struct drm_panel *panel)
{
struct nl8048_panel *lcd = to_nl8048_device(panel);
gpiod_set_value_cansleep(lcd->reset_gpio, 0);
return 0;
}
static int nl8048_enable(struct drm_panel *panel)
{
struct nl8048_panel *lcd = to_nl8048_device(panel);
gpiod_set_value_cansleep(lcd->reset_gpio, 1);
return 0;
}
static const struct drm_display_mode nl8048_mode = {
/* NEC PIX Clock Ratings MIN:21.8MHz TYP:23.8MHz MAX:25.7MHz */
.clock = 23800,
.hdisplay = 800,
.hsync_start = 800 + 6,
.hsync_end = 800 + 6 + 1,
.htotal = 800 + 6 + 1 + 4,
.vdisplay = 480,
.vsync_start = 480 + 3,
.vsync_end = 480 + 3 + 1,
.vtotal = 480 + 3 + 1 + 4,
.vrefresh = 60,
.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
.width_mm = 89,
.height_mm = 53,
};
static int nl8048_get_modes(struct drm_panel *panel)
{
struct drm_connector *connector = panel->connector;
struct drm_display_mode *mode;
mode = drm_mode_duplicate(panel->drm, &nl8048_mode);
if (!mode)
return -ENOMEM;
drm_mode_set_name(mode);
drm_mode_probed_add(connector, mode);
connector->display_info.width_mm = nl8048_mode.width_mm;
connector->display_info.height_mm = nl8048_mode.height_mm;
connector->display_info.bus_flags = DRM_BUS_FLAG_DE_HIGH
| DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE
| DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE;
return 1;
}
static const struct drm_panel_funcs nl8048_funcs = {
.disable = nl8048_disable,
.enable = nl8048_enable,
.get_modes = nl8048_get_modes,
};
static int __maybe_unused nl8048_suspend(struct device *dev)
{
struct nl8048_panel *lcd = dev_get_drvdata(dev);
nl8048_write(lcd, 2, 0x01);
msleep(40);
return 0;
}
static int __maybe_unused nl8048_resume(struct device *dev)
{
struct nl8048_panel *lcd = dev_get_drvdata(dev);
/* Reinitialize the panel. */
spi_setup(lcd->spi);
nl8048_write(lcd, 2, 0x00);
nl8048_init(lcd);
return 0;
}
static SIMPLE_DEV_PM_OPS(nl8048_pm_ops, nl8048_suspend, nl8048_resume);
static int nl8048_probe(struct spi_device *spi)
{
struct nl8048_panel *lcd;
int ret;
lcd = devm_kzalloc(&spi->dev, sizeof(*lcd), GFP_KERNEL);
if (!lcd)
return -ENOMEM;
spi_set_drvdata(spi, lcd);
lcd->spi = spi;
lcd->reset_gpio = devm_gpiod_get(&spi->dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(lcd->reset_gpio)) {
dev_err(&spi->dev, "failed to parse reset gpio\n");
return PTR_ERR(lcd->reset_gpio);
}
spi->mode = SPI_MODE_0;
spi->bits_per_word = 32;
ret = spi_setup(spi);
if (ret < 0) {
dev_err(&spi->dev, "failed to setup SPI: %d\n", ret);
return ret;
}
ret = nl8048_init(lcd);
if (ret < 0)
return ret;
drm_panel_init(&lcd->panel);
lcd->panel.dev = &lcd->spi->dev;
lcd->panel.funcs = &nl8048_funcs;
return drm_panel_add(&lcd->panel);
}
static int nl8048_remove(struct spi_device *spi)
{
struct nl8048_panel *lcd = spi_get_drvdata(spi);
drm_panel_remove(&lcd->panel);
drm_panel_disable(&lcd->panel);
drm_panel_unprepare(&lcd->panel);
return 0;
}
static const struct of_device_id nl8048_of_match[] = {
{ .compatible = "nec,nl8048hl11", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, nl8048_of_match);
static struct spi_driver nl8048_driver = {
.probe = nl8048_probe,
.remove = nl8048_remove,
.driver = {
.name = "panel-nec-nl8048hl11",
.pm = &nl8048_pm_ops,
.of_match_table = nl8048_of_match,
},
};
module_spi_driver(nl8048_driver);
MODULE_ALIAS("spi:nec,nl8048hl11");
MODULE_AUTHOR("Erik Gilling <konkers@android.com>");
MODULE_DESCRIPTION("NEC-NL8048HL11 Driver");
MODULE_LICENSE("GPL");
|
