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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 | // SPDX-License-Identifier: GPL-2.0+ /* * Custom FB driver for tinylcd.com display * * Copyright (C) 2013 Noralf Tronnes */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/delay.h> #include <video/mipi_display.h> #include "fbtft.h" #define DRVNAME "fb_tinylcd" #define WIDTH 320 #define HEIGHT 480 static int init_display(struct fbtft_par *par) { par->fbtftops.reset(par); write_reg(par, 0xB0, 0x80); write_reg(par, 0xC0, 0x0A, 0x0A); write_reg(par, 0xC1, 0x45, 0x07); write_reg(par, 0xC2, 0x33); write_reg(par, 0xC5, 0x00, 0x42, 0x80); write_reg(par, 0xB1, 0xD0, 0x11); write_reg(par, 0xB4, 0x02); write_reg(par, 0xB6, 0x00, 0x22, 0x3B); write_reg(par, 0xB7, 0x07); write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0x58); write_reg(par, 0xF0, 0x36, 0xA5, 0xD3); write_reg(par, 0xE5, 0x80); write_reg(par, 0xE5, 0x01); write_reg(par, 0xB3, 0x00); write_reg(par, 0xE5, 0x00); write_reg(par, 0xF0, 0x36, 0xA5, 0x53); write_reg(par, 0xE0, 0x00, 0x35, 0x33, 0x00, 0x00, 0x00, 0x00, 0x35, 0x33, 0x00, 0x00, 0x00); write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, 0x55); write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE); udelay(250); write_reg(par, MIPI_DCS_SET_DISPLAY_ON); return 0; } static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) { write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS, xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF); write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS, ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF); write_reg(par, MIPI_DCS_WRITE_MEMORY_START); } static int set_var(struct fbtft_par *par) { switch (par->info->var.rotate) { case 270: write_reg(par, 0xB6, 0x00, 0x02, 0x3B); write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0x28); break; case 180: write_reg(par, 0xB6, 0x00, 0x22, 0x3B); write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0x58); break; case 90: write_reg(par, 0xB6, 0x00, 0x22, 0x3B); write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0x38); break; default: write_reg(par, 0xB6, 0x00, 0x22, 0x3B); write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0x08); break; } return 0; } static struct fbtft_display display = { .regwidth = 8, .width = WIDTH, .height = HEIGHT, .fbtftops = { .init_display = init_display, .set_addr_win = set_addr_win, .set_var = set_var, }, }; FBTFT_REGISTER_DRIVER(DRVNAME, "neosec,tinylcd", &display); MODULE_ALIAS("spi:" DRVNAME); MODULE_ALIAS("spi:tinylcd"); MODULE_DESCRIPTION("Custom FB driver for tinylcd.com display"); MODULE_AUTHOR("Noralf Tronnes"); MODULE_LICENSE("GPL"); |