Thomas Petazzoni | 8f7fdaaf | 2014-12-31 10:11:17 +0100 | [diff] [blame] | 1 | /* |
| 2 | * FB driver for the ILI9340 LCD Controller |
| 3 | * |
| 4 | * Copyright (C) 2013 Noralf Tronnes |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19 | */ |
| 20 | |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/init.h> |
| 24 | #include <linux/gpio.h> |
| 25 | #include <linux/delay.h> |
| 26 | |
| 27 | #include "fbtft.h" |
| 28 | |
| 29 | #define DRVNAME "fb_ili9340" |
| 30 | #define WIDTH 240 |
| 31 | #define HEIGHT 320 |
| 32 | |
| 33 | |
| 34 | /* Init sequence taken from: Arduino Library for the Adafruit 2.2" display */ |
| 35 | static int init_display(struct fbtft_par *par) |
| 36 | { |
| 37 | fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__); |
| 38 | |
| 39 | par->fbtftops.reset(par); |
| 40 | |
| 41 | write_reg(par, 0xEF, 0x03, 0x80, 0x02); |
Aya Mahfouz | 43da0d9 | 2015-02-19 04:43:51 +0200 | [diff] [blame] | 42 | write_reg(par, 0xCF, 0x00, 0XC1, 0X30); |
| 43 | write_reg(par, 0xED, 0x64, 0x03, 0X12, 0X81); |
| 44 | write_reg(par, 0xE8, 0x85, 0x00, 0x78); |
| 45 | write_reg(par, 0xCB, 0x39, 0x2C, 0x00, 0x34, 0x02); |
Thomas Petazzoni | 8f7fdaaf | 2014-12-31 10:11:17 +0100 | [diff] [blame] | 46 | write_reg(par, 0xF7, 0x20); |
Aya Mahfouz | 43da0d9 | 2015-02-19 04:43:51 +0200 | [diff] [blame] | 47 | write_reg(par, 0xEA, 0x00, 0x00); |
Thomas Petazzoni | 8f7fdaaf | 2014-12-31 10:11:17 +0100 | [diff] [blame] | 48 | |
| 49 | /* Power Control 1 */ |
| 50 | write_reg(par, 0xC0, 0x23); |
| 51 | |
| 52 | /* Power Control 2 */ |
| 53 | write_reg(par, 0xC1, 0x10); |
| 54 | |
| 55 | /* VCOM Control 1 */ |
| 56 | write_reg(par, 0xC5, 0x3e, 0x28); |
| 57 | |
| 58 | /* VCOM Control 2 */ |
| 59 | write_reg(par, 0xC7, 0x86); |
| 60 | |
| 61 | /* COLMOD: Pixel Format Set */ |
| 62 | /* 16 bits/pixel */ |
| 63 | write_reg(par, 0x3A, 0x55); |
| 64 | |
| 65 | /* Frame Rate Control */ |
| 66 | /* Division ratio = fosc, Frame Rate = 79Hz */ |
| 67 | write_reg(par, 0xB1, 0x00, 0x18); |
| 68 | |
| 69 | /* Display Function Control */ |
| 70 | write_reg(par, 0xB6, 0x08, 0x82, 0x27); |
| 71 | |
| 72 | /* Gamma Function Disable */ |
| 73 | write_reg(par, 0xF2, 0x00); |
| 74 | |
| 75 | /* Gamma curve selected */ |
| 76 | write_reg(par, 0x26, 0x01); |
| 77 | |
| 78 | /* Positive Gamma Correction */ |
| 79 | write_reg(par, 0xE0, |
| 80 | 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1, |
| 81 | 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00); |
| 82 | |
| 83 | /* Negative Gamma Correction */ |
| 84 | write_reg(par, 0xE1, |
| 85 | 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1, |
| 86 | 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F); |
| 87 | |
| 88 | /* Sleep OUT */ |
| 89 | write_reg(par, 0x11); |
| 90 | |
| 91 | mdelay(120); |
| 92 | |
| 93 | /* Display ON */ |
| 94 | write_reg(par, 0x29); |
| 95 | |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) |
| 100 | { |
| 101 | fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par, |
| 102 | "%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye); |
| 103 | |
| 104 | /* Column address */ |
| 105 | write_reg(par, 0x2A, xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF); |
| 106 | |
Masanari Iida | 92def78 | 2015-03-21 11:48:37 +0900 | [diff] [blame] | 107 | /* Row address */ |
Thomas Petazzoni | 8f7fdaaf | 2014-12-31 10:11:17 +0100 | [diff] [blame] | 108 | write_reg(par, 0x2B, ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF); |
| 109 | |
| 110 | /* Memory write */ |
| 111 | write_reg(par, 0x2C); |
| 112 | } |
| 113 | |
| 114 | #define ILI9340_MADCTL_MV 0x20 |
| 115 | #define ILI9340_MADCTL_MX 0x40 |
| 116 | #define ILI9340_MADCTL_MY 0x80 |
| 117 | static int set_var(struct fbtft_par *par) |
| 118 | { |
| 119 | u8 val; |
| 120 | |
| 121 | fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__); |
| 122 | |
| 123 | switch (par->info->var.rotate) { |
| 124 | case 270: |
| 125 | val = ILI9340_MADCTL_MV; |
| 126 | break; |
| 127 | case 180: |
| 128 | val = ILI9340_MADCTL_MY; |
| 129 | break; |
| 130 | case 90: |
| 131 | val = ILI9340_MADCTL_MV | ILI9340_MADCTL_MY | ILI9340_MADCTL_MX; |
| 132 | break; |
| 133 | default: |
| 134 | val = ILI9340_MADCTL_MX; |
| 135 | break; |
| 136 | } |
| 137 | /* Memory Access Control */ |
| 138 | write_reg(par, 0x36, val | (par->bgr << 3)); |
| 139 | |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | |
| 144 | static struct fbtft_display display = { |
| 145 | .regwidth = 8, |
| 146 | .width = WIDTH, |
| 147 | .height = HEIGHT, |
| 148 | .fbtftops = { |
| 149 | .init_display = init_display, |
| 150 | .set_addr_win = set_addr_win, |
| 151 | .set_var = set_var, |
| 152 | }, |
| 153 | }; |
| 154 | FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9340", &display); |
| 155 | |
| 156 | MODULE_ALIAS("spi:" DRVNAME); |
| 157 | MODULE_ALIAS("platform:" DRVNAME); |
| 158 | MODULE_ALIAS("spi:ili9340"); |
| 159 | MODULE_ALIAS("platform:ili9340"); |
| 160 | |
| 161 | MODULE_DESCRIPTION("FB driver for the ILI9340 LCD Controller"); |
| 162 | MODULE_AUTHOR("Noralf Tronnes"); |
| 163 | MODULE_LICENSE("GPL"); |