| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * FB driver for the uPD161704 LCD Controller |
| * |
| * Copyright (C) 2014 Seong-Woo Kim |
| * |
| * Based on fb_ili9325.c by Noralf Tronnes |
| * Based on ili9325.c by Jeroen Domburg |
| * Init code from UTFT library by Henning Karlsen |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| |
| #include "fbtft.h" |
| |
| #define DRVNAME "fb_bd663474" |
| #define WIDTH 240 |
| #define HEIGHT 320 |
| #define BPP 16 |
| |
| static int init_display(struct fbtft_par *par) |
| { |
| par->fbtftops.reset(par); |
| |
| /* Initialization sequence from Lib_UTFT */ |
| |
| /* oscillator start */ |
| write_reg(par, 0x000, 0x0001); /*oscillator 0: stop, 1: operation */ |
| mdelay(10); |
| |
| /* Power settings */ |
| write_reg(par, 0x100, 0x0000); /* power supply setup */ |
| write_reg(par, 0x101, 0x0000); |
| write_reg(par, 0x102, 0x3110); |
| write_reg(par, 0x103, 0xe200); |
| write_reg(par, 0x110, 0x009d); |
| write_reg(par, 0x111, 0x0022); |
| write_reg(par, 0x100, 0x0120); |
| mdelay(20); |
| |
| write_reg(par, 0x100, 0x3120); |
| mdelay(80); |
| /* Display control */ |
| write_reg(par, 0x001, 0x0100); |
| write_reg(par, 0x002, 0x0000); |
| write_reg(par, 0x003, 0x1230); |
| write_reg(par, 0x006, 0x0000); |
| write_reg(par, 0x007, 0x0101); |
| write_reg(par, 0x008, 0x0808); |
| write_reg(par, 0x009, 0x0000); |
| write_reg(par, 0x00b, 0x0000); |
| write_reg(par, 0x00c, 0x0000); |
| write_reg(par, 0x00d, 0x0018); |
| /* LTPS control settings */ |
| write_reg(par, 0x012, 0x0000); |
| write_reg(par, 0x013, 0x0000); |
| write_reg(par, 0x018, 0x0000); |
| write_reg(par, 0x019, 0x0000); |
| |
| write_reg(par, 0x203, 0x0000); |
| write_reg(par, 0x204, 0x0000); |
| |
| write_reg(par, 0x210, 0x0000); |
| write_reg(par, 0x211, 0x00ef); |
| write_reg(par, 0x212, 0x0000); |
| write_reg(par, 0x213, 0x013f); |
| write_reg(par, 0x214, 0x0000); |
| write_reg(par, 0x215, 0x0000); |
| write_reg(par, 0x216, 0x0000); |
| write_reg(par, 0x217, 0x0000); |
| |
| /* Gray scale settings */ |
| write_reg(par, 0x300, 0x5343); |
| write_reg(par, 0x301, 0x1021); |
| write_reg(par, 0x302, 0x0003); |
| write_reg(par, 0x303, 0x0011); |
| write_reg(par, 0x304, 0x050a); |
| write_reg(par, 0x305, 0x4342); |
| write_reg(par, 0x306, 0x1100); |
| write_reg(par, 0x307, 0x0003); |
| write_reg(par, 0x308, 0x1201); |
| write_reg(par, 0x309, 0x050a); |
| |
| /* RAM access settings */ |
| write_reg(par, 0x400, 0x4027); |
| write_reg(par, 0x401, 0x0000); |
| write_reg(par, 0x402, 0x0000); /* First screen drive position (1) */ |
| write_reg(par, 0x403, 0x013f); /* First screen drive position (2) */ |
| write_reg(par, 0x404, 0x0000); |
| |
| write_reg(par, 0x200, 0x0000); |
| write_reg(par, 0x201, 0x0000); |
| write_reg(par, 0x100, 0x7120); |
| write_reg(par, 0x007, 0x0103); |
| mdelay(10); |
| write_reg(par, 0x007, 0x0113); |
| |
| return 0; |
| } |
| |
| static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) |
| { |
| switch (par->info->var.rotate) { |
| /* R200h = Horizontal GRAM Start Address */ |
| /* R201h = Vertical GRAM Start Address */ |
| case 0: |
| write_reg(par, 0x0200, xs); |
| write_reg(par, 0x0201, ys); |
| break; |
| case 180: |
| write_reg(par, 0x0200, WIDTH - 1 - xs); |
| write_reg(par, 0x0201, HEIGHT - 1 - ys); |
| break; |
| case 270: |
| write_reg(par, 0x0200, WIDTH - 1 - ys); |
| write_reg(par, 0x0201, xs); |
| break; |
| case 90: |
| write_reg(par, 0x0200, ys); |
| write_reg(par, 0x0201, HEIGHT - 1 - xs); |
| break; |
| } |
| write_reg(par, 0x202); /* Write Data to GRAM */ |
| } |
| |
| static int set_var(struct fbtft_par *par) |
| { |
| switch (par->info->var.rotate) { |
| /* AM: GRAM update direction */ |
| case 0: |
| write_reg(par, 0x003, 0x1230); |
| break; |
| case 180: |
| write_reg(par, 0x003, 0x1200); |
| break; |
| case 270: |
| write_reg(par, 0x003, 0x1228); |
| break; |
| case 90: |
| write_reg(par, 0x003, 0x1218); |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static struct fbtft_display display = { |
| .regwidth = 16, |
| .width = WIDTH, |
| .height = HEIGHT, |
| .bpp = BPP, |
| .fbtftops = { |
| .init_display = init_display, |
| .set_addr_win = set_addr_win, |
| .set_var = set_var, |
| }, |
| }; |
| |
| FBTFT_REGISTER_DRIVER(DRVNAME, "hitachi,bd663474", &display); |
| |
| MODULE_ALIAS("spi:" DRVNAME); |
| MODULE_ALIAS("platform:" DRVNAME); |
| MODULE_ALIAS("spi:bd663474"); |
| MODULE_ALIAS("platform:bd663474"); |
| |
| MODULE_DESCRIPTION("FB driver for the uPD161704 LCD Controller"); |
| MODULE_AUTHOR("Seong-Woo Kim"); |
| MODULE_LICENSE("GPL"); |