cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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fb_ili9340.c (3212B)

      1// SPDX-License-Identifier: GPL-2.0+
      2/*
      3 * FB driver for the ILI9340 LCD Controller
      4 *
      5 * Copyright (C) 2013 Noralf Tronnes
      6 */
      7
      8#include <linux/module.h>
      9#include <linux/kernel.h>
     10#include <linux/init.h>
     11#include <linux/delay.h>
     12#include <video/mipi_display.h>
     13
     14#include "fbtft.h"
     15
     16#define DRVNAME		"fb_ili9340"
     17#define WIDTH		240
     18#define HEIGHT		320
     19
     20/* Init sequence taken from: Arduino Library for the Adafruit 2.2" display */
     21static int init_display(struct fbtft_par *par)
     22{
     23	par->fbtftops.reset(par);
     24
     25	write_reg(par, 0xEF, 0x03, 0x80, 0x02);
     26	write_reg(par, 0xCF, 0x00, 0XC1, 0X30);
     27	write_reg(par, 0xED, 0x64, 0x03, 0X12, 0X81);
     28	write_reg(par, 0xE8, 0x85, 0x00, 0x78);
     29	write_reg(par, 0xCB, 0x39, 0x2C, 0x00, 0x34, 0x02);
     30	write_reg(par, 0xF7, 0x20);
     31	write_reg(par, 0xEA, 0x00, 0x00);
     32
     33	/* Power Control 1 */
     34	write_reg(par, 0xC0, 0x23);
     35
     36	/* Power Control 2 */
     37	write_reg(par, 0xC1, 0x10);
     38
     39	/* VCOM Control 1 */
     40	write_reg(par, 0xC5, 0x3e, 0x28);
     41
     42	/* VCOM Control 2 */
     43	write_reg(par, 0xC7, 0x86);
     44
     45	/* COLMOD: Pixel Format Set */
     46	/* 16 bits/pixel */
     47	write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, 0x55);
     48
     49	/* Frame Rate Control */
     50	/* Division ratio = fosc, Frame Rate = 79Hz */
     51	write_reg(par, 0xB1, 0x00, 0x18);
     52
     53	/* Display Function Control */
     54	write_reg(par, 0xB6, 0x08, 0x82, 0x27);
     55
     56	/* Gamma Function Disable */
     57	write_reg(par, 0xF2, 0x00);
     58
     59	/* Gamma curve selection */
     60	write_reg(par, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
     61
     62	/* Positive Gamma Correction */
     63	write_reg(par, 0xE0,
     64		  0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1,
     65		  0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00);
     66
     67	/* Negative Gamma Correction */
     68	write_reg(par, 0xE1,
     69		  0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1,
     70		  0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F);
     71
     72	write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
     73
     74	mdelay(120);
     75
     76	write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
     77
     78	return 0;
     79}
     80
     81static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
     82{
     83	write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
     84		  xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
     85
     86	write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
     87		  ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
     88
     89	write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
     90}
     91
     92#define ILI9340_MADCTL_MV  0x20
     93#define ILI9340_MADCTL_MX  0x40
     94#define ILI9340_MADCTL_MY  0x80
     95static int set_var(struct fbtft_par *par)
     96{
     97	u8 val;
     98
     99	switch (par->info->var.rotate) {
    100	case 270:
    101		val = ILI9340_MADCTL_MV;
    102		break;
    103	case 180:
    104		val = ILI9340_MADCTL_MY;
    105		break;
    106	case 90:
    107		val = ILI9340_MADCTL_MV | ILI9340_MADCTL_MY | ILI9340_MADCTL_MX;
    108		break;
    109	default:
    110		val = ILI9340_MADCTL_MX;
    111		break;
    112	}
    113	/* Memory Access Control  */
    114	write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, val | (par->bgr << 3));
    115
    116	return 0;
    117}
    118
    119static struct fbtft_display display = {
    120	.regwidth = 8,
    121	.width = WIDTH,
    122	.height = HEIGHT,
    123	.fbtftops = {
    124		.init_display = init_display,
    125		.set_addr_win = set_addr_win,
    126		.set_var = set_var,
    127	},
    128};
    129
    130FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9340", &display);
    131
    132MODULE_ALIAS("spi:" DRVNAME);
    133MODULE_ALIAS("platform:" DRVNAME);
    134MODULE_ALIAS("spi:ili9340");
    135MODULE_ALIAS("platform:ili9340");
    136
    137MODULE_DESCRIPTION("FB driver for the ILI9340 LCD Controller");
    138MODULE_AUTHOR("Noralf Tronnes");
    139MODULE_LICENSE("GPL");