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068a0023 AH |
1 | /* |
2 | * MIPI DSI Bus | |
3 | * | |
4 | * Copyright (C) 2012-2013, Samsung Electronics, Co., Ltd. | |
5 | * Andrzej Hajda <a.hajda@samsung.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #ifndef __DRM_MIPI_DSI_H__ | |
13 | #define __DRM_MIPI_DSI_H__ | |
14 | ||
15 | #include <linux/device.h> | |
16 | ||
17 | struct mipi_dsi_host; | |
18 | struct mipi_dsi_device; | |
19 | ||
20 | /** | |
21 | * struct mipi_dsi_msg - read/write DSI buffer | |
22 | * @channel: virtual channel id | |
23 | * @type: payload data type | |
24 | * @tx_len: length of @tx_buf | |
25 | * @tx_buf: data to be written | |
26 | * @rx_len: length of @rx_buf | |
27 | * @rx_buf: data to be read, or NULL | |
28 | */ | |
29 | struct mipi_dsi_msg { | |
30 | u8 channel; | |
31 | u8 type; | |
32 | ||
33 | size_t tx_len; | |
34 | const void *tx_buf; | |
35 | ||
36 | size_t rx_len; | |
37 | void *rx_buf; | |
38 | }; | |
39 | ||
40 | /** | |
41 | * struct mipi_dsi_host_ops - DSI bus operations | |
42 | * @attach: attach DSI device to DSI host | |
43 | * @detach: detach DSI device from DSI host | |
44 | * @transfer: send and/or receive DSI packet, return number of received bytes, | |
45 | * or error | |
46 | */ | |
47 | struct mipi_dsi_host_ops { | |
48 | int (*attach)(struct mipi_dsi_host *host, | |
49 | struct mipi_dsi_device *dsi); | |
50 | int (*detach)(struct mipi_dsi_host *host, | |
51 | struct mipi_dsi_device *dsi); | |
52 | ssize_t (*transfer)(struct mipi_dsi_host *host, | |
53 | struct mipi_dsi_msg *msg); | |
54 | }; | |
55 | ||
56 | /** | |
57 | * struct mipi_dsi_host - DSI host device | |
58 | * @dev: driver model device node for this DSI host | |
59 | * @ops: DSI host operations | |
60 | */ | |
61 | struct mipi_dsi_host { | |
62 | struct device *dev; | |
63 | const struct mipi_dsi_host_ops *ops; | |
64 | }; | |
65 | ||
66 | int mipi_dsi_host_register(struct mipi_dsi_host *host); | |
67 | void mipi_dsi_host_unregister(struct mipi_dsi_host *host); | |
68 | ||
69 | /* DSI mode flags */ | |
70 | ||
71 | /* video mode */ | |
72 | #define MIPI_DSI_MODE_VIDEO BIT(0) | |
73 | /* video burst mode */ | |
74 | #define MIPI_DSI_MODE_VIDEO_BURST BIT(1) | |
75 | /* video pulse mode */ | |
76 | #define MIPI_DSI_MODE_VIDEO_SYNC_PULSE BIT(2) | |
77 | /* enable auto vertical count mode */ | |
78 | #define MIPI_DSI_MODE_VIDEO_AUTO_VERT BIT(3) | |
79 | /* enable hsync-end packets in vsync-pulse and v-porch area */ | |
80 | #define MIPI_DSI_MODE_VIDEO_HSE BIT(4) | |
81 | /* disable hfront-porch area */ | |
82 | #define MIPI_DSI_MODE_VIDEO_HFP BIT(5) | |
83 | /* disable hback-porch area */ | |
84 | #define MIPI_DSI_MODE_VIDEO_HBP BIT(6) | |
85 | /* disable hsync-active area */ | |
86 | #define MIPI_DSI_MODE_VIDEO_HSA BIT(7) | |
87 | /* flush display FIFO on vsync pulse */ | |
88 | #define MIPI_DSI_MODE_VSYNC_FLUSH BIT(8) | |
89 | /* disable EoT packets in HS mode */ | |
90 | #define MIPI_DSI_MODE_EOT_PACKET BIT(9) | |
91 | ||
92 | enum mipi_dsi_pixel_format { | |
93 | MIPI_DSI_FMT_RGB888, | |
94 | MIPI_DSI_FMT_RGB666, | |
95 | MIPI_DSI_FMT_RGB666_PACKED, | |
96 | MIPI_DSI_FMT_RGB565, | |
97 | }; | |
98 | ||
99 | /** | |
100 | * struct mipi_dsi_device - DSI peripheral device | |
101 | * @host: DSI host for this peripheral | |
102 | * @dev: driver model device node for this peripheral | |
103 | * @channel: virtual channel assigned to the peripheral | |
104 | * @format: pixel format for video mode | |
105 | * @lanes: number of active data lanes | |
106 | * @mode_flags: DSI operation mode related flags | |
107 | */ | |
108 | struct mipi_dsi_device { | |
109 | struct mipi_dsi_host *host; | |
110 | struct device dev; | |
111 | ||
112 | unsigned int channel; | |
113 | unsigned int lanes; | |
114 | enum mipi_dsi_pixel_format format; | |
115 | unsigned long mode_flags; | |
116 | }; | |
117 | ||
118 | #define to_mipi_dsi_device(d) container_of(d, struct mipi_dsi_device, dev) | |
119 | ||
120 | int mipi_dsi_attach(struct mipi_dsi_device *dsi); | |
121 | int mipi_dsi_detach(struct mipi_dsi_device *dsi); | |
122 | int mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, unsigned int channel, | |
123 | const void *data, size_t len); | |
124 | ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, unsigned int channel, | |
125 | u8 cmd, void *data, size_t len); | |
126 | ||
127 | /** | |
128 | * struct mipi_dsi_driver - DSI driver | |
129 | * @driver: device driver model driver | |
130 | * @probe: callback for device binding | |
131 | * @remove: callback for device unbinding | |
132 | */ | |
133 | struct mipi_dsi_driver { | |
134 | struct device_driver driver; | |
135 | int(*probe)(struct mipi_dsi_device *dsi); | |
136 | int(*remove)(struct mipi_dsi_device *dsi); | |
137 | }; | |
138 | ||
139 | #define to_mipi_dsi_driver(d) container_of(d, struct mipi_dsi_driver, driver) | |
140 | ||
141 | static inline void *mipi_dsi_get_drvdata(const struct mipi_dsi_device *dsi) | |
142 | { | |
143 | return dev_get_drvdata(&dsi->dev); | |
144 | } | |
145 | ||
146 | static inline void mipi_dsi_set_drvdata(struct mipi_dsi_device *dsi, void *data) | |
147 | { | |
148 | dev_set_drvdata(&dsi->dev, data); | |
149 | } | |
150 | ||
151 | int mipi_dsi_driver_register(struct mipi_dsi_driver *driver); | |
152 | void mipi_dsi_driver_unregister(struct mipi_dsi_driver *driver); | |
153 | ||
154 | #define module_mipi_dsi_driver(__mipi_dsi_driver) \ | |
155 | module_driver(__mipi_dsi_driver, mipi_dsi_driver_register, \ | |
156 | mipi_dsi_driver_unregister) | |
157 | ||
158 | #endif /* __DRM_MIPI_DSI__ */ |