| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * V4L2 fwnode binding parsing library |
| 3 | * |
| 4 | * Copyright (c) 2016 Intel Corporation. |
| 5 | * Author: Sakari Ailus <sakari.ailus@linux.intel.com> |
| 6 | * |
| 7 | * Copyright (C) 2012 - 2013 Samsung Electronics Co., Ltd. |
| 8 | * Author: Sylwester Nawrocki <s.nawrocki@samsung.com> |
| 9 | * |
| 10 | * Copyright (C) 2012 Renesas Electronics Corp. |
| 11 | * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de> |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or modify |
| 14 | * it under the terms of version 2 of the GNU General Public License as |
| 15 | * published by the Free Software Foundation. |
| 16 | */ |
| 17 | #ifndef _V4L2_FWNODE_H |
| 18 | #define _V4L2_FWNODE_H |
| 19 | |
| 20 | #include <linux/errno.h> |
| 21 | #include <linux/fwnode.h> |
| 22 | #include <linux/list.h> |
| 23 | #include <linux/types.h> |
| 24 | |
| 25 | #include <media/v4l2-mediabus.h> |
| 26 | |
| 27 | struct fwnode_handle; |
| 28 | |
| 29 | #define V4L2_FWNODE_CSI2_MAX_DATA_LANES 4 |
| 30 | |
| 31 | /** |
| 32 | * struct v4l2_fwnode_bus_mipi_csi2 - MIPI CSI-2 bus data structure |
| 33 | * @flags: media bus (V4L2_MBUS_*) flags |
| 34 | * @data_lanes: an array of physical data lane indexes |
| 35 | * @clock_lane: physical lane index of the clock lane |
| 36 | * @num_data_lanes: number of data lanes |
| 37 | * @lane_polarities: polarity of the lanes. The order is the same of |
| 38 | * the physical lanes. |
| 39 | */ |
| 40 | struct v4l2_fwnode_bus_mipi_csi2 { |
| 41 | unsigned int flags; |
| 42 | unsigned char data_lanes[V4L2_FWNODE_CSI2_MAX_DATA_LANES]; |
| 43 | unsigned char clock_lane; |
| 44 | unsigned short num_data_lanes; |
| 45 | bool lane_polarities[1 + V4L2_FWNODE_CSI2_MAX_DATA_LANES]; |
| 46 | }; |
| 47 | |
| 48 | /** |
| 49 | * struct v4l2_fwnode_bus_parallel - parallel data bus data structure |
| 50 | * @flags: media bus (V4L2_MBUS_*) flags |
| 51 | * @bus_width: bus width in bits |
| 52 | * @data_shift: data shift in bits |
| 53 | */ |
| 54 | struct v4l2_fwnode_bus_parallel { |
| 55 | unsigned int flags; |
| 56 | unsigned char bus_width; |
| 57 | unsigned char data_shift; |
| 58 | }; |
| 59 | |
| 60 | /** |
| 61 | * struct v4l2_fwnode_bus_mipi_csi1 - CSI-1/CCP2 data bus structure |
| 62 | * @clock_inv: polarity of clock/strobe signal |
| 63 | * false - not inverted, true - inverted |
| 64 | * @strobe: false - data/clock, true - data/strobe |
| 65 | * @lane_polarity: the polarities of the clock (index 0) and data lanes |
| 66 | * index (1) |
| 67 | * @data_lane: the number of the data lane |
| 68 | * @clock_lane: the number of the clock lane |
| 69 | */ |
| 70 | struct v4l2_fwnode_bus_mipi_csi1 { |
| 71 | bool clock_inv; |
| 72 | bool strobe; |
| 73 | bool lane_polarity[2]; |
| 74 | unsigned char data_lane; |
| 75 | unsigned char clock_lane; |
| 76 | }; |
| 77 | |
| 78 | /** |
| 79 | * struct v4l2_fwnode_endpoint - the endpoint data structure |
| 80 | * @base: fwnode endpoint of the v4l2_fwnode |
| 81 | * @bus_type: bus type |
| 82 | * @bus: bus configuration data structure |
| 83 | * @link_frequencies: array of supported link frequencies |
| 84 | * @nr_of_link_frequencies: number of elements in link_frequenccies array |
| 85 | */ |
| 86 | struct v4l2_fwnode_endpoint { |
| 87 | struct fwnode_endpoint base; |
| 88 | /* |
| 89 | * Fields below this line will be zeroed by |
| 90 | * v4l2_fwnode_parse_endpoint() |
| 91 | */ |
| 92 | enum v4l2_mbus_type bus_type; |
| 93 | union { |
| 94 | struct v4l2_fwnode_bus_parallel parallel; |
| 95 | struct v4l2_fwnode_bus_mipi_csi1 mipi_csi1; |
| 96 | struct v4l2_fwnode_bus_mipi_csi2 mipi_csi2; |
| 97 | } bus; |
| 98 | u64 *link_frequencies; |
| 99 | unsigned int nr_of_link_frequencies; |
| 100 | }; |
| 101 | |
| 102 | /** |
| 103 | * struct v4l2_fwnode_link - a link between two endpoints |
| 104 | * @local_node: pointer to device_node of this endpoint |
| 105 | * @local_port: identifier of the port this endpoint belongs to |
| 106 | * @remote_node: pointer to device_node of the remote endpoint |
| 107 | * @remote_port: identifier of the port the remote endpoint belongs to |
| 108 | */ |
| 109 | struct v4l2_fwnode_link { |
| 110 | struct fwnode_handle *local_node; |
| 111 | unsigned int local_port; |
| 112 | struct fwnode_handle *remote_node; |
| 113 | unsigned int remote_port; |
| 114 | }; |
| 115 | |
| 116 | int v4l2_fwnode_endpoint_parse(struct fwnode_handle *fwnode, |
| 117 | struct v4l2_fwnode_endpoint *vep); |
| 118 | struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse( |
| 119 | struct fwnode_handle *fwnode); |
| 120 | void v4l2_fwnode_endpoint_free(struct v4l2_fwnode_endpoint *vep); |
| 121 | int v4l2_fwnode_parse_link(struct fwnode_handle *fwnode, |
| 122 | struct v4l2_fwnode_link *link); |
| 123 | void v4l2_fwnode_put_link(struct v4l2_fwnode_link *link); |
| 124 | |
| 125 | #endif /* _V4L2_FWNODE_H */ |