include/video/exynos_mipi_dsim.h

   1 /* include/video/exynos_mipi_dsim.h
   2  *
   3  * Platform data header for Samsung SoC MIPI-DSIM.
   4  *
   5  * Copyright (c) 2012 Samsung Electronics Co., Ltd
   6  *
   7  * InKi Dae <inki.dae@samsung.com>
   8  * Donghwa Lee <dh09.lee@samsung.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13 */
  14
  15 #ifndef _EXYNOS_MIPI_DSIM_H
  16 #define _EXYNOS_MIPI_DSIM_H
  17
  18 #include <linux/device.h>
  19 #include <linux/fb.h>
  20
  21 #define PANEL_NAME_SIZE         (32)
  22
  23 /*
  24  * Enumerate display interface type.
  25  *
  26  * DSIM_COMMAND means cpu interface and rgb interface for DSIM_VIDEO.
  27  *
  28  * P.S. MIPI DSI Master has two display controller intefaces, RGB Interface
  29  *      for main display and CPU Interface(same as I80 Interface) for main
  30  *      and sub display.
  31  */
  32 enum mipi_dsim_interface_type {
  33         DSIM_COMMAND,
  34         DSIM_VIDEO
  35 };
  36
  37 enum mipi_dsim_virtual_ch_no {
  38         DSIM_VIRTUAL_CH_0,
  39         DSIM_VIRTUAL_CH_1,
  40         DSIM_VIRTUAL_CH_2,
  41         DSIM_VIRTUAL_CH_3
  42 };
  43
  44 enum mipi_dsim_burst_mode_type {
  45         DSIM_NON_BURST_SYNC_EVENT,
  46         DSIM_BURST_SYNC_EVENT,
  47         DSIM_NON_BURST_SYNC_PULSE,
  48         DSIM_BURST,
  49         DSIM_NON_VIDEO_MODE
  50 };
  51
  52 enum mipi_dsim_no_of_data_lane {
  53         DSIM_DATA_LANE_1,
  54         DSIM_DATA_LANE_2,
  55         DSIM_DATA_LANE_3,
  56         DSIM_DATA_LANE_4
  57 };
  58
  59 enum mipi_dsim_byte_clk_src {
  60         DSIM_PLL_OUT_DIV8,
  61         DSIM_EXT_CLK_DIV8,
  62         DSIM_EXT_CLK_BYPASS
  63 };
  64
  65 enum mipi_dsim_pixel_format {
  66         DSIM_CMD_3BPP,
  67         DSIM_CMD_8BPP,
  68         DSIM_CMD_12BPP,
  69         DSIM_CMD_16BPP,
  70         DSIM_VID_16BPP_565,
  71         DSIM_VID_18BPP_666PACKED,
  72         DSIM_18BPP_666LOOSELYPACKED,
  73         DSIM_24BPP_888
  74 };
  75
  76 /*
  77  * struct mipi_dsim_config - interface for configuring mipi-dsi controller.
  78  *
  79  * @auto_flush: enable or disable Auto flush of MD FIFO using VSYNC pulse.
  80  * @eot_disable: enable or disable EoT packet in HS mode.
  81  * @auto_vertical_cnt: specifies auto vertical count mode.
  82  *      in Video mode, the vertical line transition uses line counter
  83  *      configured by VSA, VBP, and Vertical resolution.
  84  *      If this bit is set to '1', the line counter does not use VSA and VBP
  85  *      registers.(in command mode, this variable is ignored)
  86  * @hse: set horizontal sync event mode.
  87  *      In VSYNC pulse and Vporch area, MIPI DSI master transfers only HSYNC
  88  *      start packet to MIPI DSI slave at MIPI DSI spec1.1r02.
  89  *      this bit transfers HSYNC end packet in VSYNC pulse and Vporch area
  90  *      (in mommand mode, this variable is ignored)
  91  * @hfp: specifies HFP disable mode.
  92  *      if this variable is set, DSI master ignores HFP area in VIDEO mode.
  93  *      (in command mode, this variable is ignored)
  94  * @hbp: specifies HBP disable mode.
  95  *      if this variable is set, DSI master ignores HBP area in VIDEO mode.
  96  *      (in command mode, this variable is ignored)
  97  * @hsa: specifies HSA disable mode.
  98  *      if this variable is set, DSI master ignores HSA area in VIDEO mode.
  99  *      (in command mode, this variable is ignored)
 100  * @cma_allow: specifies the number of horizontal lines, where command packet
 101  *      transmission is allowed after Stable VFP period.
 102  * @e_interface: specifies interface to be used.(CPU or RGB interface)
 103  * @e_virtual_ch: specifies virtual channel number that main or
 104  *      sub diaplsy uses.
 105  * @e_pixel_format: specifies pixel stream format for main or sub display.
 106  * @e_burst_mode: selects Burst mode in Video mode.
 107  *      in Non-burst mode, RGB data area is filled with RGB data and NULL
 108  *      packets, according to input bandwidth of RGB interface.
 109  *      In Burst mode, RGB data area is filled with RGB data only.
 110  * @e_no_data_lane: specifies data lane count to be used by Master.
 111  * @e_byte_clk: select byte clock source. (it must be DSIM_PLL_OUT_DIV8)
 112  *      DSIM_EXT_CLK_DIV8 and DSIM_EXT_CLK_BYPASSS are not supported.
 113  * @pll_stable_time: specifies the PLL Timer for stability of the ganerated
 114  *      clock(System clock cycle base)
 115  *      if the timer value goes to 0x00000000, the clock stable bit of status
 116  *      and interrupt register is set.
 117  * @esc_clk: specifies escape clock frequency for getting the escape clock
 118  *      prescaler value.
 119  * @stop_holding_cnt: specifies the interval value between transmitting
 120  *      read packet(or write "set_tear_on" command) and BTA request.
 121  *      after transmitting read packet or write "set_tear_on" command,
 122  *      BTA requests to D-PHY automatically. this counter value specifies
 123  *      the interval between them.
 124  * @bta_timeout: specifies the timer for BTA.
 125  *      this register specifies time out from BTA request to change
 126  *      the direction with respect to Tx escape clock.
 127  * @rx_timeout: specifies the timer for LP Rx mode timeout.
 128  *      this register specifies time out on how long RxValid deasserts,
 129  *      after RxLpdt asserts with respect to Tx escape clock.
 130  *      - RxValid specifies Rx data valid indicator.
 131  *      - RxLpdt specifies an indicator that D-PHY is under RxLpdt mode.
 132  *      - RxValid and RxLpdt specifies signal from D-PHY.
 133  */
 134 struct mipi_dsim_config {
 135         unsigned char                   auto_flush;
 136         unsigned char                   eot_disable;
 137
 138         unsigned char                   auto_vertical_cnt;
 139         unsigned char                   hse;
 140         unsigned char                   hfp;
 141         unsigned char                   hbp;
 142         unsigned char                   hsa;
 143         unsigned char                   cmd_allow;
 144
 145         enum mipi_dsim_interface_type   e_interface;
 146         enum mipi_dsim_virtual_ch_no    e_virtual_ch;
 147         enum mipi_dsim_pixel_format     e_pixel_format;
 148         enum mipi_dsim_burst_mode_type  e_burst_mode;
 149         enum mipi_dsim_no_of_data_lane  e_no_data_lane;
 150         enum mipi_dsim_byte_clk_src     e_byte_clk;
 151
 152         /*
 153          * ===========================================
 154          * |    P    |    M    |    S    |    MHz    |
 155          * -------------------------------------------
 156          * |    3    |   100   |    3    |    100    |
 157          * |    3    |   100   |    2    |    200    |
 158          * |    3    |    63   |    1    |    252    |
 159          * |    4    |   100   |    1    |    300    |
 160          * |    4    |   110   |    1    |    330    |
 161          * |   12    |   350   |    1    |    350    |
 162          * |    3    |   100   |    1    |    400    |
 163          * |    4    |   150   |    1    |    450    |
 164          * |    6    |   118   |    1    |    472    |
 165          * |    3    |   120   |    1    |    480    |
 166          * |   12    |   250   |    0    |    500    |
 167          * |    4    |   100   |    0    |    600    |
 168          * |    3    |    81   |    0    |    648    |
 169          * |    3    |    88   |    0    |    704    |
 170          * |    3    |    90   |    0    |    720    |
 171          * |    3    |   100   |    0    |    800    |
 172          * |   12    |   425   |    0    |    850    |
 173          * |    4    |   150   |    0    |    900    |
 174          * |   12    |   475   |    0    |    950    |
 175          * |    6    |   250   |    0    |   1000    |
 176          * -------------------------------------------
 177          */
 178
 179         /*
 180          * pms could be calculated as the following.
 181          * M * 24 / P * 2 ^ S = MHz
 182          */
 183         unsigned char                   p;
 184         unsigned short                  m;
 185         unsigned char                   s;
 186
 187         unsigned int                    pll_stable_time;
 188         unsigned long                   esc_clk;
 189
 190         unsigned short                  stop_holding_cnt;
 191         unsigned char                   bta_timeout;
 192         unsigned short                  rx_timeout;
 193 };
 194
 195 /*
 196  * struct mipi_dsim_device - global interface for mipi-dsi driver.
 197  *
 198  * @dev: driver model representation of the device.
 199  * @id: unique device id.
 200  * @clock: pointer to MIPI-DSI clock of clock framework.
 201  * @irq: interrupt number to MIPI-DSI controller.
 202  * @reg_base: base address to memory mapped SRF of MIPI-DSI controller.
 203  *      (virtual address)
 204  * @lock: the mutex protecting this data structure.
 205  * @dsim_info: infomation for configuring mipi-dsi controller.
 206  * @master_ops: callbacks to mipi-dsi operations.
 207  * @dsim_lcd_dev: pointer to activated ddi device.
 208  *      (it would be registered by mipi-dsi driver.)
 209  * @dsim_lcd_drv: pointer to activated_ddi driver.
 210  *      (it would be registered by mipi-dsi driver.)
 211  * @lcd_info: pointer to mipi_lcd_info structure.
 212  * @state: specifies status of MIPI-DSI controller.
 213  *      the status could be RESET, INIT, STOP, HSCLKEN and ULPS.
 214  * @data_lane: specifiec enabled data lane number.
 215  *      this variable would be set by driver according to e_no_data_lane
 216  *      automatically.
 217  * @e_clk_src: select byte clock source.
 218  * @pd: pointer to MIPI-DSI driver platform data.
 219  * @phy: pointer to the MIPI-DSI PHY
 220  */
 221 struct mipi_dsim_device {
 222         struct device                   *dev;
 223         int                             id;
 224         struct clk                      *clock;
 225         unsigned int                    irq;
 226         void __iomem                    *reg_base;
 227         struct mutex                    lock;
 228
 229         struct mipi_dsim_config         *dsim_config;
 230         struct mipi_dsim_master_ops     *master_ops;
 231         struct mipi_dsim_lcd_device     *dsim_lcd_dev;
 232         struct mipi_dsim_lcd_driver     *dsim_lcd_drv;
 233
 234         unsigned int                    state;
 235         unsigned int                    data_lane;
 236         unsigned int                    e_clk_src;
 237         bool                            suspended;
 238
 239         struct mipi_dsim_platform_data  *pd;
 240         struct phy                      *phy;
 241 };
 242
 243 /*
 244  * struct mipi_dsim_platform_data - interface to platform data
 245  *      for mipi-dsi driver.
 246  *
 247  * @lcd_panel_name: specifies lcd panel name registered to mipi-dsi driver.
 248  *      lcd panel driver searched would be actived.
 249  * @dsim_config: pointer of structure for configuring mipi-dsi controller.
 250  * @enabled: indicate whether mipi controller got enabled or not.
 251  * @lcd_panel_info: pointer for lcd panel specific structure.
 252  *      this structure specifies width, height, timing and polarity and so on.
 253  */
 254 struct mipi_dsim_platform_data {
 255         char                            lcd_panel_name[PANEL_NAME_SIZE];
 256
 257         struct mipi_dsim_config         *dsim_config;
 258         unsigned int                    enabled;
 259         void                            *lcd_panel_info;
 260 };
 261
 262 /*
 263  * struct mipi_dsim_master_ops - callbacks to mipi-dsi operations.
 264  *
 265  * @cmd_write: transfer command to lcd panel at LP mode.
 266  * @cmd_read: read command from rx register.
 267  * @get_dsim_frame_done: get the status that all screen data have been
 268  *      transferred to mipi-dsi.
 269  * @clear_dsim_frame_done: clear frame done status.
 270  * @get_fb_frame_done: get frame done status of display controller.
 271  * @trigger: trigger display controller.
 272  *      - this one would be used only in case of CPU mode.
 273  *  @set_early_blank_mode: set framebuffer blank mode.
 274  *      - this callback should be called prior to fb_blank() by a client driver
 275  *      only if needing.
 276  *  @set_blank_mode: set framebuffer blank mode.
 277  *      - this callback should be called after fb_blank() by a client driver
 278  *      only if needing.
 279  */
 280
 281 struct mipi_dsim_master_ops {
 282         int (*cmd_write)(struct mipi_dsim_device *dsim, unsigned int data_id,
 283                 const unsigned char *data0, unsigned int data1);
 284         int (*cmd_read)(struct mipi_dsim_device *dsim, unsigned int data_id,
 285                 unsigned int data0, unsigned int req_size, u8 *rx_buf);
 286         int (*get_dsim_frame_done)(struct mipi_dsim_device *dsim);
 287         int (*clear_dsim_frame_done)(struct mipi_dsim_device *dsim);
 288
 289         int (*get_fb_frame_done)(struct fb_info *info);
 290         void (*trigger)(struct fb_info *info);
 291         int (*set_early_blank_mode)(struct mipi_dsim_device *dsim, int power);
 292         int (*set_blank_mode)(struct mipi_dsim_device *dsim, int power);
 293 };
 294
 295 /*
 296  * device structure for mipi-dsi based lcd panel.
 297  *
 298  * @name: name of the device to use with this device, or an
 299  *      alias for that name.
 300  * @dev: driver model representation of the device.
 301  * @id: id of device to be registered.
 302  * @bus_id: bus id for identifing connected bus
 303  *      and this bus id should be same as id of mipi_dsim_device.
 304  * @irq: irq number for signaling when framebuffer transfer of
 305  *      lcd panel module is completed.
 306  *      this irq would be used only for MIPI-DSI based CPU mode lcd panel.
 307  * @master: pointer to mipi-dsi master device object.
 308  * @platform_data: lcd panel specific platform data.
 309  */
 310 struct mipi_dsim_lcd_device {
 311         char                    *name;
 312         struct device           dev;
 313         int                     id;
 314         int                     bus_id;
 315         int                     irq;
 316         int                     panel_reverse;
 317
 318         struct mipi_dsim_device *master;
 319         void                    *platform_data;
 320 };
 321
 322 /*
 323  * driver structure for mipi-dsi based lcd panel.
 324  *
 325  * this structure should be registered by lcd panel driver.
 326  * mipi-dsi driver seeks lcd panel registered through name field
 327  * and calls these callback functions in appropriate time.
 328  *
 329  * @name: name of the driver to use with this device, or an
 330  *      alias for that name.
 331  * @id: id of driver to be registered.
 332  *      this id would be used for finding device object registered.
 333  */
 334 struct mipi_dsim_lcd_driver {
 335         char                    *name;
 336         int                     id;
 337
 338         void    (*power_on)(struct mipi_dsim_lcd_device *dsim_dev, int enable);
 339         void    (*set_sequence)(struct mipi_dsim_lcd_device *dsim_dev);
 340         int     (*probe)(struct mipi_dsim_lcd_device *dsim_dev);
 341         int     (*remove)(struct mipi_dsim_lcd_device *dsim_dev);
 342         void    (*shutdown)(struct mipi_dsim_lcd_device *dsim_dev);
 343         int     (*suspend)(struct mipi_dsim_lcd_device *dsim_dev);
 344         int     (*resume)(struct mipi_dsim_lcd_device *dsim_dev);
 345 };
 346
 347 /*
 348  * register mipi_dsim_lcd_device to mipi-dsi master.
 349  */
 350 int exynos_mipi_dsi_register_lcd_device(struct mipi_dsim_lcd_device
 351                                                 *lcd_dev);
 352 /**
 353  * register mipi_dsim_lcd_driver object defined by lcd panel driver
 354  * to mipi-dsi driver.
 355  */
 356 int exynos_mipi_dsi_register_lcd_driver(struct mipi_dsim_lcd_driver
 357                                                 *lcd_drv);
 358 #endif /* _EXYNOS_MIPI_DSIM_H */