1 /*
2 * Copyright (c) 2020 Teslabs Engineering S.L.
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <errno.h>
8
9 #include <zephyr/drivers/mipi_dsi.h>
10
mipi_dsi_generic_read(const struct device * dev,uint8_t channel,const void * params,size_t nparams,void * buf,size_t len)11 ssize_t mipi_dsi_generic_read(const struct device *dev, uint8_t channel,
12 const void *params, size_t nparams,
13 void *buf, size_t len)
14 {
15 struct mipi_dsi_msg msg = {
16 .tx_len = nparams,
17 .tx_buf = params,
18 .rx_len = len,
19 .rx_buf = buf
20 };
21
22 switch (nparams) {
23 case 0U:
24 msg.type = MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM;
25 break;
26
27 case 1U:
28 msg.type = MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM;
29 break;
30
31 case 2U:
32 msg.type = MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM;
33 break;
34
35 default:
36 return -EINVAL;
37 }
38
39 return mipi_dsi_transfer(dev, channel, &msg);
40 }
41
mipi_dsi_generic_write(const struct device * dev,uint8_t channel,const void * buf,size_t len)42 ssize_t mipi_dsi_generic_write(const struct device *dev, uint8_t channel,
43 const void *buf, size_t len)
44 {
45 struct mipi_dsi_msg msg = {
46 .tx_buf = buf,
47 .tx_len = len
48 };
49
50 switch (len) {
51 case 0U:
52 msg.type = MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM;
53 break;
54
55 case 1U:
56 msg.type = MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM;
57 break;
58
59 case 2U:
60 msg.type = MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM;
61 break;
62
63 default:
64 msg.type = MIPI_DSI_GENERIC_LONG_WRITE;
65 break;
66 }
67
68 return mipi_dsi_transfer(dev, channel, &msg);
69 }
70
mipi_dsi_dcs_read(const struct device * dev,uint8_t channel,uint8_t cmd,void * buf,size_t len)71 ssize_t mipi_dsi_dcs_read(const struct device *dev, uint8_t channel,
72 uint8_t cmd, void *buf, size_t len)
73 {
74 struct mipi_dsi_msg msg = {
75 .type = MIPI_DSI_DCS_READ,
76 .cmd = cmd,
77 .rx_buf = buf,
78 .rx_len = len
79 };
80
81 return mipi_dsi_transfer(dev, channel, &msg);
82 }
83
mipi_dsi_dcs_write(const struct device * dev,uint8_t channel,uint8_t cmd,const void * buf,size_t len)84 ssize_t mipi_dsi_dcs_write(const struct device *dev, uint8_t channel,
85 uint8_t cmd, const void *buf, size_t len)
86 {
87 struct mipi_dsi_msg msg = {
88 .cmd = cmd,
89 .tx_buf = buf,
90 .tx_len = len
91 };
92
93 switch (len) {
94 case 0U:
95 msg.type = MIPI_DSI_DCS_SHORT_WRITE;
96 break;
97
98 case 1U:
99 msg.type = MIPI_DSI_DCS_SHORT_WRITE_PARAM;
100 break;
101
102 default:
103 msg.type = MIPI_DSI_DCS_LONG_WRITE;
104 break;
105 }
106
107 return mipi_dsi_transfer(dev, channel, &msg);
108 }
109
