cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

fb_tinylcd.c (2548B)

      1// SPDX-License-Identifier: GPL-2.0+
      2/*
      3 * Custom FB driver for tinylcd.com display
      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_tinylcd"
     17#define WIDTH		320
     18#define HEIGHT		480
     19
     20static int init_display(struct fbtft_par *par)
     21{
     22	par->fbtftops.reset(par);
     23
     24	write_reg(par, 0xB0, 0x80);
     25	write_reg(par, 0xC0, 0x0A, 0x0A);
     26	write_reg(par, 0xC1, 0x45, 0x07);
     27	write_reg(par, 0xC2, 0x33);
     28	write_reg(par, 0xC5, 0x00, 0x42, 0x80);
     29	write_reg(par, 0xB1, 0xD0, 0x11);
     30	write_reg(par, 0xB4, 0x02);
     31	write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
     32	write_reg(par, 0xB7, 0x07);
     33	write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0x58);
     34	write_reg(par, 0xF0, 0x36, 0xA5, 0xD3);
     35	write_reg(par, 0xE5, 0x80);
     36	write_reg(par, 0xE5, 0x01);
     37	write_reg(par, 0xB3, 0x00);
     38	write_reg(par, 0xE5, 0x00);
     39	write_reg(par, 0xF0, 0x36, 0xA5, 0x53);
     40	write_reg(par, 0xE0, 0x00, 0x35, 0x33, 0x00, 0x00, 0x00,
     41		       0x00, 0x35, 0x33, 0x00, 0x00, 0x00);
     42	write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, 0x55);
     43	write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
     44	udelay(250);
     45	write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
     46
     47	return 0;
     48}
     49
     50static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
     51{
     52	write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
     53		  xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
     54
     55	write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
     56		  ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
     57
     58	write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
     59}
     60
     61static int set_var(struct fbtft_par *par)
     62{
     63	switch (par->info->var.rotate) {
     64	case 270:
     65		write_reg(par, 0xB6, 0x00, 0x02, 0x3B);
     66		write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0x28);
     67		break;
     68	case 180:
     69		write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
     70		write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0x58);
     71		break;
     72	case 90:
     73		write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
     74		write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0x38);
     75		break;
     76	default:
     77		write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
     78		write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0x08);
     79		break;
     80	}
     81
     82	return 0;
     83}
     84
     85static struct fbtft_display display = {
     86	.regwidth = 8,
     87	.width = WIDTH,
     88	.height = HEIGHT,
     89	.fbtftops = {
     90		.init_display = init_display,
     91		.set_addr_win = set_addr_win,
     92		.set_var = set_var,
     93	},
     94};
     95
     96FBTFT_REGISTER_DRIVER(DRVNAME, "neosec,tinylcd", &display);
     97
     98MODULE_ALIAS("spi:" DRVNAME);
     99MODULE_ALIAS("spi:tinylcd");
    100
    101MODULE_DESCRIPTION("Custom FB driver for tinylcd.com display");
    102MODULE_AUTHOR("Noralf Tronnes");
    103MODULE_LICENSE("GPL");