| /* |
| * FB driver for the ILI9340 LCD Controller |
| * |
| * Copyright (C) 2013 Noralf Tronnes |
| * |
| * 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 <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/gpio.h> |
| #include <linux/delay.h> |
| |
| #include "fbtft.h" |
| |
| #define DRVNAME "fb_ili9340" |
| #define WIDTH 240 |
| #define HEIGHT 320 |
| |
| /* Init sequence taken from: Arduino Library for the Adafruit 2.2" display */ |
| static int init_display(struct fbtft_par *par) |
| { |
| par->fbtftops.reset(par); |
| |
| write_reg(par, 0xEF, 0x03, 0x80, 0x02); |
| write_reg(par, 0xCF, 0x00, 0XC1, 0X30); |
| write_reg(par, 0xED, 0x64, 0x03, 0X12, 0X81); |
| write_reg(par, 0xE8, 0x85, 0x00, 0x78); |
| write_reg(par, 0xCB, 0x39, 0x2C, 0x00, 0x34, 0x02); |
| write_reg(par, 0xF7, 0x20); |
| write_reg(par, 0xEA, 0x00, 0x00); |
| |
| /* Power Control 1 */ |
| write_reg(par, 0xC0, 0x23); |
| |
| /* Power Control 2 */ |
| write_reg(par, 0xC1, 0x10); |
| |
| /* VCOM Control 1 */ |
| write_reg(par, 0xC5, 0x3e, 0x28); |
| |
| /* VCOM Control 2 */ |
| write_reg(par, 0xC7, 0x86); |
| |
| /* COLMOD: Pixel Format Set */ |
| /* 16 bits/pixel */ |
| write_reg(par, 0x3A, 0x55); |
| |
| /* Frame Rate Control */ |
| /* Division ratio = fosc, Frame Rate = 79Hz */ |
| write_reg(par, 0xB1, 0x00, 0x18); |
| |
| /* Display Function Control */ |
| write_reg(par, 0xB6, 0x08, 0x82, 0x27); |
| |
| /* Gamma Function Disable */ |
| write_reg(par, 0xF2, 0x00); |
| |
| /* Gamma curve selected */ |
| write_reg(par, 0x26, 0x01); |
| |
| /* Positive Gamma Correction */ |
| write_reg(par, 0xE0, |
| 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1, |
| 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00); |
| |
| /* Negative Gamma Correction */ |
| write_reg(par, 0xE1, |
| 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1, |
| 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F); |
| |
| /* Sleep OUT */ |
| write_reg(par, 0x11); |
| |
| mdelay(120); |
| |
| /* Display ON */ |
| write_reg(par, 0x29); |
| |
| return 0; |
| } |
| |
| static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) |
| { |
| /* Column address */ |
| write_reg(par, 0x2A, xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF); |
| |
| /* Row address */ |
| write_reg(par, 0x2B, ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF); |
| |
| /* Memory write */ |
| write_reg(par, 0x2C); |
| } |
| |
| #define ILI9340_MADCTL_MV 0x20 |
| #define ILI9340_MADCTL_MX 0x40 |
| #define ILI9340_MADCTL_MY 0x80 |
| static int set_var(struct fbtft_par *par) |
| { |
| u8 val; |
| |
| switch (par->info->var.rotate) { |
| case 270: |
| val = ILI9340_MADCTL_MV; |
| break; |
| case 180: |
| val = ILI9340_MADCTL_MY; |
| break; |
| case 90: |
| val = ILI9340_MADCTL_MV | ILI9340_MADCTL_MY | ILI9340_MADCTL_MX; |
| break; |
| default: |
| val = ILI9340_MADCTL_MX; |
| break; |
| } |
| /* Memory Access Control */ |
| write_reg(par, 0x36, val | (par->bgr << 3)); |
| |
| 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, "ilitek,ili9340", &display); |
| |
| MODULE_ALIAS("spi:" DRVNAME); |
| MODULE_ALIAS("platform:" DRVNAME); |
| MODULE_ALIAS("spi:ili9340"); |
| MODULE_ALIAS("platform:ili9340"); |
| |
| MODULE_DESCRIPTION("FB driver for the ILI9340 LCD Controller"); |
| MODULE_AUTHOR("Noralf Tronnes"); |
| MODULE_LICENSE("GPL"); |