Thomas Petazzoni | ef8f9ab | 2014-12-31 10:11:30 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Custom FB driver for tinylcd.com display |
| 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/delay.h> |
| 25 | |
| 26 | #include "fbtft.h" |
| 27 | |
| 28 | #define DRVNAME "fb_tinylcd" |
| 29 | #define WIDTH 320 |
| 30 | #define HEIGHT 480 |
| 31 | |
| 32 | |
| 33 | static int init_display(struct fbtft_par *par) |
| 34 | { |
| 35 | fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__); |
| 36 | |
| 37 | par->fbtftops.reset(par); |
| 38 | |
| 39 | write_reg(par, 0xB0, 0x80); |
| 40 | write_reg(par, 0xC0, 0x0A, 0x0A); |
| 41 | write_reg(par, 0xC1, 0x45, 0x07); |
| 42 | write_reg(par, 0xC2, 0x33); |
| 43 | write_reg(par, 0xC5, 0x00, 0x42, 0x80); |
| 44 | write_reg(par, 0xB1, 0xD0, 0x11); |
| 45 | write_reg(par, 0xB4, 0x02); |
| 46 | write_reg(par, 0xB6, 0x00, 0x22, 0x3B); |
| 47 | write_reg(par, 0xB7, 0x07); |
| 48 | write_reg(par, 0x36, 0x58); |
| 49 | write_reg(par, 0xF0, 0x36, 0xA5, 0xD3); |
| 50 | write_reg(par, 0xE5, 0x80); |
| 51 | write_reg(par, 0xE5, 0x01); |
| 52 | write_reg(par, 0xB3, 0x00); |
| 53 | write_reg(par, 0xE5, 0x00); |
| 54 | write_reg(par, 0xF0, 0x36, 0xA5, 0x53); |
| 55 | write_reg(par, 0xE0, 0x00, 0x35, 0x33, 0x00, 0x00, 0x00, |
| 56 | 0x00, 0x35, 0x33, 0x00, 0x00, 0x00); |
| 57 | write_reg(par, 0x3A, 0x55); |
| 58 | write_reg(par, 0x11); |
| 59 | udelay(250); |
| 60 | write_reg(par, 0x29); |
| 61 | |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) |
| 66 | { |
| 67 | fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par, |
| 68 | "%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye); |
| 69 | |
| 70 | /* Column address */ |
| 71 | write_reg(par, 0x2A, xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF); |
| 72 | |
Masanari Iida | 92def78 | 2015-03-21 11:48:37 +0900 | [diff] [blame] | 73 | /* Row address */ |
Thomas Petazzoni | ef8f9ab | 2014-12-31 10:11:30 +0100 | [diff] [blame] | 74 | write_reg(par, 0x2B, ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF); |
| 75 | |
| 76 | /* Memory write */ |
| 77 | write_reg(par, 0x2C); |
| 78 | } |
| 79 | |
| 80 | static int set_var(struct fbtft_par *par) |
| 81 | { |
| 82 | fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__); |
| 83 | |
| 84 | switch (par->info->var.rotate) { |
| 85 | case 270: |
| 86 | write_reg(par, 0xB6, 0x00, 0x02, 0x3B); |
| 87 | write_reg(par, 0x36, 0x28); |
| 88 | break; |
| 89 | case 180: |
| 90 | write_reg(par, 0xB6, 0x00, 0x22, 0x3B); |
| 91 | write_reg(par, 0x36, 0x58); |
| 92 | break; |
| 93 | case 90: |
| 94 | write_reg(par, 0xB6, 0x00, 0x22, 0x3B); |
| 95 | write_reg(par, 0x36, 0x38); |
| 96 | break; |
| 97 | default: |
| 98 | write_reg(par, 0xB6, 0x00, 0x22, 0x3B); |
| 99 | write_reg(par, 0x36, 0x08); |
| 100 | break; |
| 101 | } |
| 102 | |
| 103 | return 0; |
| 104 | } |
| 105 | |
| 106 | |
| 107 | static struct fbtft_display display = { |
| 108 | .regwidth = 8, |
| 109 | .width = WIDTH, |
| 110 | .height = HEIGHT, |
| 111 | .fbtftops = { |
| 112 | .init_display = init_display, |
| 113 | .set_addr_win = set_addr_win, |
| 114 | .set_var = set_var, |
| 115 | }, |
| 116 | }; |
| 117 | FBTFT_REGISTER_DRIVER(DRVNAME, "neosec,tinylcd", &display); |
| 118 | |
| 119 | MODULE_ALIAS("spi:" DRVNAME); |
| 120 | MODULE_ALIAS("spi:tinylcd"); |
| 121 | |
| 122 | MODULE_DESCRIPTION("Custom FB driver for tinylcd.com display"); |
| 123 | MODULE_AUTHOR("Noralf Tronnes"); |
| 124 | MODULE_LICENSE("GPL"); |