root/drivers/staging/fbtft/fb_ili9486.c

DEFINITIONS

1. set_addr_win
2. set_var

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * FB driver for the ILI9486 LCD Controller
   4  *
   5  * Copyright (C) 2014 Noralf Tronnes
   6  */
   7 
   8 #include <linux/module.h>
   9 #include <linux/kernel.h>
  10 #include <linux/init.h>
  11 #include <video/mipi_display.h>
  12 
  13 #include "fbtft.h"
  14 
  15 #define DRVNAME         "fb_ili9486"
  16 #define WIDTH           320
  17 #define HEIGHT          480
  18 
  19 /* this init sequence matches PiScreen */
  20 static const s16 default_init_sequence[] = {
  21         /* Interface Mode Control */
  22         -1, 0xb0, 0x0,
  23         -1, MIPI_DCS_EXIT_SLEEP_MODE,
  24         -2, 250,
  25         /* Interface Pixel Format */
  26         -1, MIPI_DCS_SET_PIXEL_FORMAT, 0x55,
  27         /* Power Control 3 */
  28         -1, 0xC2, 0x44,
  29         /* VCOM Control 1 */
  30         -1, 0xC5, 0x00, 0x00, 0x00, 0x00,
  31         /* PGAMCTRL(Positive Gamma Control) */
  32         -1, 0xE0, 0x0F, 0x1F, 0x1C, 0x0C, 0x0F, 0x08, 0x48, 0x98,
  33                   0x37, 0x0A, 0x13, 0x04, 0x11, 0x0D, 0x00,
  34         /* NGAMCTRL(Negative Gamma Control) */
  35         -1, 0xE1, 0x0F, 0x32, 0x2E, 0x0B, 0x0D, 0x05, 0x47, 0x75,
  36                   0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00,
  37         /* Digital Gamma Control 1 */
  38         -1, 0xE2, 0x0F, 0x32, 0x2E, 0x0B, 0x0D, 0x05, 0x47, 0x75,
  39                   0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00,
  40         -1, MIPI_DCS_EXIT_SLEEP_MODE,
  41         -1, MIPI_DCS_SET_DISPLAY_ON,
  42         /* end marker */
  43         -3
  44 };
  45 
  46 static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
  47 {
  48         write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
  49                   xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
  50 
  51         write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
  52                   ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
  53 
  54         write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
  55 }
  56 
  57 static int set_var(struct fbtft_par *par)
  58 {
  59         switch (par->info->var.rotate) {
  60         case 0:
  61                 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  62                           0x80 | (par->bgr << 3));
  63                 break;
  64         case 90:
  65                 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  66                           0x20 | (par->bgr << 3));
  67                 break;
  68         case 180:
  69                 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  70                           0x40 | (par->bgr << 3));
  71                 break;
  72         case 270:
  73                 write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
  74                           0xE0 | (par->bgr << 3));
  75                 break;
  76         default:
  77                 break;
  78         }
  79 
  80         return 0;
  81 }
  82 
  83 static struct fbtft_display display = {
  84         .regwidth = 8,
  85         .width = WIDTH,
  86         .height = HEIGHT,
  87         .init_sequence = default_init_sequence,
  88         .fbtftops = {
  89                 .set_addr_win = set_addr_win,
  90                 .set_var = set_var,
  91         },
  92 };
  93 
  94 FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9486", &display);
  95 
  96 MODULE_ALIAS("spi:" DRVNAME);
  97 MODULE_ALIAS("platform:" DRVNAME);
  98 MODULE_ALIAS("spi:ili9486");
  99 MODULE_ALIAS("platform:ili9486");
 100 
 101 MODULE_DESCRIPTION("FB driver for the ILI9486 LCD Controller");
 102 MODULE_AUTHOR("Noralf Tronnes");
 103 MODULE_LICENSE("GPL");