// SPDX-License-Identifier: GPL-2.0 /* * FB driver for the NHD-1.69-160128UGC3 (Newhaven Display International, Inc.) * using the SEPS525 (Syncoam) LCD Controller * * Copyright (C) 2016 Analog Devices Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include #include #include "fbtft.h" #define DRVNAME "fb_seps525" #define WIDTH 160 #define HEIGHT 128 #define SEPS525_INDEX 0x00 #define SEPS525_STATUS_RD 0x01 #define SEPS525_OSC_CTL 0x02 #define SEPS525_IREF 0x80 #define SEPS525_CLOCK_DIV 0x03 #define SEPS525_REDUCE_CURRENT 0x04 #define SEPS525_SOFT_RST 0x05 #define SEPS525_DISP_ONOFF 0x06 #define SEPS525_PRECHARGE_TIME_R 0x08 #define SEPS525_PRECHARGE_TIME_G 0x09 #define SEPS525_PRECHARGE_TIME_B 0x0A #define SEPS525_PRECHARGE_CURRENT_R 0x0B #define SEPS525_PRECHARGE_CURRENT_G 0x0C #define SEPS525_PRECHARGE_CURRENT_B 0x0D #define SEPS525_DRIVING_CURRENT_R 0x10 #define SEPS525_DRIVING_CURRENT_G 0x11 #define SEPS525_DRIVING_CURRENT_B 0x12 #define SEPS525_DISPLAYMODE_SET 0x13 #define SEPS525_RGBIF 0x14 #define SEPS525_RGB_POL 0x15 #define SEPS525_MEMORY_WRITEMODE 0x16 #define SEPS525_MX1_ADDR 0x17 #define SEPS525_MX2_ADDR 0x18 #define SEPS525_MY1_ADDR 0x19 #define SEPS525_MY2_ADDR 0x1A #define SEPS525_MEMORY_ACCESS_POINTER_X 0x20 #define SEPS525_MEMORY_ACCESS_POINTER_Y 0x21 #define SEPS525_DDRAM_DATA_ACCESS_PORT 0x22 #define SEPS525_GRAY_SCALE_TABLE_INDEX 0x50 #define SEPS525_GRAY_SCALE_TABLE_DATA 0x51 #define SEPS525_DUTY 0x28 #define SEPS525_DSL 0x29 #define SEPS525_D1_DDRAM_FAC 0x2E #define SEPS525_D1_DDRAM_FAR 0x2F #define SEPS525_D2_DDRAM_SAC 0x31 #define SEPS525_D2_DDRAM_SAR 0x32 #define SEPS525_SCR1_FX1 0x33 #define SEPS525_SCR1_FX2 0x34 #define SEPS525_SCR1_FY1 0x35 #define SEPS525_SCR1_FY2 0x36 #define SEPS525_SCR2_SX1 0x37 #define SEPS525_SCR2_SX2 0x38 #define SEPS525_SCR2_SY1 0x39 #define SEPS525_SCR2_SY2 0x3A #define SEPS525_SCREEN_SAVER_CONTEROL 0x3B #define SEPS525_SS_SLEEP_TIMER 0x3C #define SEPS525_SCREEN_SAVER_MODE 0x3D #define SEPS525_SS_SCR1_FU 0x3E #define SEPS525_SS_SCR1_MXY 0x3F #define SEPS525_SS_SCR2_FU 0x40 #define SEPS525_SS_SCR2_MXY 0x41 #define SEPS525_MOVING_DIRECTION 0x42 #define SEPS525_SS_SCR2_SX1 0x47 #define SEPS525_SS_SCR2_SX2 0x48 #define SEPS525_SS_SCR2_SY1 0x49 #define SEPS525_SS_SCR2_SY2 0x4A /* SEPS525_DISPLAYMODE_SET */ #define MODE_SWAP_BGR BIT(7) #define MODE_SM BIT(6) #define MODE_RD BIT(5) #define MODE_CD BIT(4) #define seps525_use_window 0 /* FBTFT doesn't really use it today */ /* Init sequence taken from: Arduino Library for the Adafruit 2.2" display */ static int init_display(struct fbtft_par *par) { par->fbtftops.reset(par); usleep_range(1000, 5000); /* Disable Oscillator Power Down */ write_reg(par, SEPS525_REDUCE_CURRENT, 0x03); usleep_range(1000, 5000); /* Set Normal Driving Current */ write_reg(par, SEPS525_REDUCE_CURRENT, 0x00); usleep_range(1000, 5000); write_reg(par, SEPS525_SCREEN_SAVER_CONTEROL, 0x00); /* Set EXPORT1 Pin at Internal Clock */ write_reg(par, SEPS525_OSC_CTL, 0x01); /* Set Clock as 120 Frames/Sec */ write_reg(par, SEPS525_CLOCK_DIV, 0x90); /* Set Reference Voltage Controlled by External Resister */ write_reg(par, SEPS525_IREF, 0x01); /* precharge time R G B */ write_reg(par, SEPS525_PRECHARGE_TIME_R, 0x04); write_reg(par, SEPS525_PRECHARGE_TIME_G, 0x05); write_reg(par, SEPS525_PRECHARGE_TIME_B, 0x05); /* precharge current R G B (uA) */ write_reg(par, SEPS525_PRECHARGE_CURRENT_R, 0x9D); write_reg(par, SEPS525_PRECHARGE_CURRENT_G, 0x8C); write_reg(par, SEPS525_PRECHARGE_CURRENT_B, 0x57); /* driving current R G B (uA) */ write_reg(par, SEPS525_DRIVING_CURRENT_R, 0x56); write_reg(par, SEPS525_DRIVING_CURRENT_G, 0x4D); write_reg(par, SEPS525_DRIVING_CURRENT_B, 0x46); /* Set Color Sequence */ write_reg(par, SEPS525_DISPLAYMODE_SET, 0xA0); write_reg(par, SEPS525_RGBIF, 0x01); /* Set MCU Interface Mode */ /* Set Memory Write Mode */ write_reg(par, SEPS525_MEMORY_WRITEMODE, 0x66); write_reg(par, SEPS525_DUTY, 0x7F); /* 1/128 Duty (0x0F~0x7F) */ /* Set Mapping RAM Display Start Line (0x00~0x7F) */ write_reg(par, SEPS525_DSL, 0x00); write_reg(par, SEPS525_DISP_ONOFF, 0x01); /* Display On (0x00/0x01) */ /* Set All Internal Register Value as Normal Mode */ write_reg(par, SEPS525_SOFT_RST, 0x00); /* Set RGB Interface Polarity as Active Low */ write_reg(par, SEPS525_RGB_POL, 0x00); write_reg(par, SEPS525_DDRAM_DATA_ACCESS_PORT); return 0; } static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) { if (seps525_use_window) { /* Set Window Xs,Ys Xe,Ye*/ write_reg(par, SEPS525_MX1_ADDR, xs); write_reg(par, SEPS525_MX2_ADDR, xe); write_reg(par, SEPS525_MY1_ADDR, ys); write_reg(par, SEPS525_MY2_ADDR, ye); } /* start position X,Y */ write_reg(par, SEPS525_MEMORY_ACCESS_POINTER_X, xs); write_reg(par, SEPS525_MEMORY_ACCESS_POINTER_Y, ys); write_reg(par, SEPS525_DDRAM_DATA_ACCESS_PORT); } static int set_var(struct fbtft_par *par) { u8 val; switch (par->info->var.rotate) { case 0: val = 0; break; case 180: val = MODE_RD | MODE_CD; break; case 90: case 270: default: return -EINVAL; } /* Memory Access Control */ write_reg(par, SEPS525_DISPLAYMODE_SET, val | (par->bgr ? MODE_SWAP_BGR : 0)); write_reg(par, SEPS525_DDRAM_DATA_ACCESS_PORT); 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, "syncoam,seps525", &display); MODULE_ALIAS("spi:" DRVNAME); MODULE_ALIAS("platform:" DRVNAME); MODULE_ALIAS("spi:seps525"); MODULE_ALIAS("platform:seps525"); MODULE_DESCRIPTION("FB driver for the SEPS525 LCD Controller"); MODULE_AUTHOR("Michael Hennerich "); MODULE_LICENSE("GPL");