1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/device.h>
4#include <linux/module.h>
5#include <linux/spi/spi.h>
6#include <linux/delay.h>
7
8#include <drm/drm_mipi_dbi.h>
9#include <drm/drm_print.h>
10
11#include "panel-samsung-s6e63m0.h"
12
13static const u8 s6e63m0_dbi_read_commands[] = {
14	MCS_READ_ID1,
15	MCS_READ_ID2,
16	MCS_READ_ID3,
17	0, /* sentinel */
18};
19
20static int s6e63m0_spi_dcs_read(struct device *dev, void *trsp,
21				const u8 cmd, u8 *data)
22{
23	struct mipi_dbi *dbi = trsp;
24	int ret;
25
26	ret = mipi_dbi_command_read(dbi, cmd, data);
27	if (ret)
28		dev_err(dev, "error on DBI read command %02x\n", cmd);
29
30	return ret;
31}
32
33static int s6e63m0_spi_dcs_write(struct device *dev, void *trsp,
34				 const u8 *data, size_t len)
35{
36	struct mipi_dbi *dbi = trsp;
37	int ret;
38
39	ret = mipi_dbi_command_stackbuf(dbi, data[0], (data + 1), (len - 1));
40	usleep_range(300, 310);
41
42	return ret;
43}
44
45static int s6e63m0_spi_probe(struct spi_device *spi)
46{
47	struct device *dev = &spi->dev;
48	struct mipi_dbi *dbi;
49	int ret;
50
51	dbi = devm_kzalloc(dev, sizeof(*dbi), GFP_KERNEL);
52	if (!dbi)
53		return -ENOMEM;
54
55	ret = mipi_dbi_spi_init(spi, dbi, NULL);
56	if (ret)
57		return dev_err_probe(dev, ret, "MIPI DBI init failed\n");
58	/* Register our custom MCS read commands */
59	dbi->read_commands = s6e63m0_dbi_read_commands;
60
61	return s6e63m0_probe(dev, dbi, s6e63m0_spi_dcs_read,
62			     s6e63m0_spi_dcs_write, false);
63}
64
65static void s6e63m0_spi_remove(struct spi_device *spi)
66{
67	s6e63m0_remove(&spi->dev);
68}
69
70static const struct of_device_id s6e63m0_spi_of_match[] = {
71	{ .compatible = "samsung,s6e63m0" },
72	{ /* sentinel */ }
73};
74MODULE_DEVICE_TABLE(of, s6e63m0_spi_of_match);
75
76static struct spi_driver s6e63m0_spi_driver = {
77	.probe			= s6e63m0_spi_probe,
78	.remove			= s6e63m0_spi_remove,
79	.driver			= {
80		.name		= "panel-samsung-s6e63m0",
81		.of_match_table = s6e63m0_spi_of_match,
82	},
83};
84module_spi_driver(s6e63m0_spi_driver);
85
86MODULE_AUTHOR("Pawe�� Chmiel <pawel.mikolaj.chmiel@gmail.com>");
87MODULE_DESCRIPTION("s6e63m0 LCD SPI Driver");
88MODULE_LICENSE("GPL v2");
89