1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2020 NVIDIA CORPORATION. All rights reserved. 4 */ 5 6 #ifndef __TEGRA_CSI_H__ 7 #define __TEGRA_CSI_H__ 8 9 #include <media/media-entity.h> 10 #include <media/v4l2-async.h> 11 #include <media/v4l2-subdev.h> 12 13 /* 14 * Each CSI brick supports max of 4 lanes that can be used as either 15 * one x4 port using both CILA and CILB partitions of a CSI brick or can 16 * be used as two x2 ports with one x2 from CILA and the other x2 from 17 * CILB. 18 */ 19 #define CSI_PORTS_PER_BRICK 2 20 #define CSI_LANES_PER_BRICK 4 21 22 /* Maximum 2 CSI x4 ports can be ganged up for streaming */ 23 #define GANG_PORTS_MAX 2 24 25 /* each CSI channel can have one sink and one source pads */ 26 #define TEGRA_CSI_PADS_NUM 2 27 28 enum tegra_csi_cil_port { 29 PORT_A = 0, 30 PORT_B, 31 }; 32 33 enum tegra_csi_block { 34 CSI_CIL_AB = 0, 35 CSI_CIL_CD, 36 CSI_CIL_EF, 37 }; 38 39 struct tegra_csi; 40 41 /** 42 * struct tegra_csi_channel - Tegra CSI channel 43 * 44 * @list: list head for this entry 45 * @subdev: V4L2 subdevice associated with this channel 46 * @pads: media pads for the subdevice entity 47 * @numpads: number of pads. 48 * @csi: Tegra CSI device structure 49 * @of_node: csi device tree node 50 * @numgangports: number of immediate ports ganged up to meet the 51 * channel bus-width 52 * @numlanes: number of lanes used per port 53 * @csi_port_nums: CSI channel port numbers 54 * @pg_mode: test pattern generator mode for channel 55 * @format: active format of the channel 56 * @framerate: active framerate for TPG 57 * @h_blank: horizontal blanking for TPG active format 58 * @v_blank: vertical blanking for TPG active format 59 * @mipi: mipi device for corresponding csi channel pads, or NULL if not applicable (TPG, error) 60 * @pixel_rate: active pixel rate from the sensor on this channel 61 */ 62 struct tegra_csi_channel { 63 struct list_head list; 64 struct v4l2_subdev subdev; 65 struct media_pad pads[TEGRA_CSI_PADS_NUM]; 66 unsigned int numpads; 67 struct tegra_csi *csi; 68 struct device_node *of_node; 69 u8 numgangports; 70 unsigned int numlanes; 71 u8 csi_port_nums[GANG_PORTS_MAX]; 72 u8 pg_mode; 73 struct v4l2_mbus_framefmt format; 74 unsigned int framerate; 75 unsigned int h_blank; 76 unsigned int v_blank; 77 struct tegra_mipi_device *mipi; 78 unsigned int pixel_rate; 79 }; 80 81 /** 82 * struct tpg_framerate - Tegra CSI TPG framerate configuration 83 * 84 * @frmsize: frame resolution 85 * @code: media bus format code 86 * @h_blank: horizontal blanking used for TPG 87 * @v_blank: vertical blanking interval used for TPG 88 * @framerate: framerate achieved with the corresponding blanking intervals, 89 * format and resolution. 90 */ 91 struct tpg_framerate { 92 struct v4l2_frmsize_discrete frmsize; 93 u32 code; 94 unsigned int h_blank; 95 unsigned int v_blank; 96 unsigned int framerate; 97 }; 98 99 /** 100 * struct tegra_csi_ops - Tegra CSI operations 101 * 102 * @csi_start_streaming: programs csi hardware to enable streaming. 103 * @csi_stop_streaming: programs csi hardware to disable streaming. 104 * @csi_err_recover: csi hardware block recovery in case of any capture errors 105 * due to missing source stream or due to improper csi input from 106 * the external source. 107 */ 108 struct tegra_csi_ops { 109 int (*csi_start_streaming)(struct tegra_csi_channel *csi_chan); 110 void (*csi_stop_streaming)(struct tegra_csi_channel *csi_chan); 111 void (*csi_err_recover)(struct tegra_csi_channel *csi_chan); 112 }; 113 114 /** 115 * struct tegra_csi_soc - NVIDIA Tegra CSI SoC structure 116 * 117 * @ops: csi hardware operations 118 * @csi_max_channels: supported max streaming channels 119 * @clk_names: csi and cil clock names 120 * @num_clks: total clocks count 121 * @tpg_frmrate_table: csi tpg frame rate table with blanking intervals 122 * @tpg_frmrate_table_size: size of frame rate table 123 */ 124 struct tegra_csi_soc { 125 const struct tegra_csi_ops *ops; 126 unsigned int csi_max_channels; 127 const char * const *clk_names; 128 unsigned int num_clks; 129 const struct tpg_framerate *tpg_frmrate_table; 130 unsigned int tpg_frmrate_table_size; 131 }; 132 133 /** 134 * struct tegra_csi - NVIDIA Tegra CSI device structure 135 * 136 * @dev: device struct 137 * @client: host1x_client struct 138 * @iomem: register base 139 * @clks: clock for CSI and CIL 140 * @soc: pointer to SoC data structure 141 * @ops: csi operations 142 * @csi_chans: list head for CSI channels 143 */ 144 struct tegra_csi { 145 struct device *dev; 146 struct host1x_client client; 147 void __iomem *iomem; 148 struct clk_bulk_data *clks; 149 const struct tegra_csi_soc *soc; 150 const struct tegra_csi_ops *ops; 151 struct list_head csi_chans; 152 }; 153 154 void tegra_csi_error_recover(struct v4l2_subdev *subdev); 155 void tegra_csi_calc_settle_time(struct tegra_csi_channel *csi_chan, 156 u8 csi_port_num, 157 u8 *clk_settle_time, 158 u8 *ths_settle_time); 159 #endif 160
