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 | |
13 | static const u8 s6e63m0_dbi_read_commands[] = { |
14 | MCS_READ_ID1, |
15 | MCS_READ_ID2, |
16 | MCS_READ_ID3, |
17 | 0, /* sentinel */ |
18 | }; |
19 | |
20 | static 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, val: data); |
27 | if (ret) |
28 | dev_err(dev, "error on DBI read command %02x\n" , cmd); |
29 | |
30 | return ret; |
31 | } |
32 | |
33 | static 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, cmd: data[0], data: (data + 1), len: (len - 1)); |
40 | usleep_range(min: 300, max: 310); |
41 | |
42 | return ret; |
43 | } |
44 | |
45 | static 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, size: 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, err: ret, fmt: "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, trsp: dbi, dcs_read: s6e63m0_spi_dcs_read, |
62 | dcs_write: s6e63m0_spi_dcs_write, dsi_mode: false); |
63 | } |
64 | |
65 | static void s6e63m0_spi_remove(struct spi_device *spi) |
66 | { |
67 | s6e63m0_remove(dev: &spi->dev); |
68 | } |
69 | |
70 | static const struct of_device_id s6e63m0_spi_of_match[] = { |
71 | { .compatible = "samsung,s6e63m0" }, |
72 | { /* sentinel */ } |
73 | }; |
74 | MODULE_DEVICE_TABLE(of, s6e63m0_spi_of_match); |
75 | |
76 | static 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 | }; |
84 | module_spi_driver(s6e63m0_spi_driver); |
85 | |
86 | MODULE_AUTHOR("Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>" ); |
87 | MODULE_DESCRIPTION("s6e63m0 LCD SPI Driver" ); |
88 | MODULE_LICENSE("GPL v2" ); |
89 | |