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staging: fbtft: add fb_ili9340 driver
This commit adds the fb_ili9340 driver from the fbtft project at https://github.com/notro/fbtft. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Noralf Tronnes <notro@tronnes.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Petazzoni
Greg Kroah-Hartman
parent
2fc51f76cf
commit
8f7fdaafff
3 changed files with 170 additions and 0 deletions
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@ -49,3 +49,9 @@ config FB_TFT_ILI9325
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depends on FB_TFT
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help
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Generic Framebuffer support for ILI9325
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config FB_TFT_ILI9340
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tristate "FB driver for the ILI9340 LCD Controller"
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depends on FB_TFT
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help
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Generic Framebuffer support for ILI9340
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@ -10,3 +10,4 @@ obj-$(CONFIG_FB_TFT_HX8347D) += fb_hx8347d.o
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obj-$(CONFIG_FB_TFT_HX8353D) += fb_hx8353d.o
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obj-$(CONFIG_FB_TFT_ILI9320) += fb_ili9320.o
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obj-$(CONFIG_FB_TFT_ILI9325) += fb_ili9325.o
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obj-$(CONFIG_FB_TFT_ILI9340) += fb_ili9340.o
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163
drivers/staging/fbtft/fb_ili9340.c
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163
drivers/staging/fbtft/fb_ili9340.c
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@ -0,0 +1,163 @@
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/*
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* FB driver for the ILI9340 LCD Controller
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*
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* Copyright (C) 2013 Noralf Tronnes
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/gpio.h>
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#include <linux/delay.h>
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#include "fbtft.h"
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#define DRVNAME "fb_ili9340"
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#define WIDTH 240
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#define HEIGHT 320
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/* Init sequence taken from: Arduino Library for the Adafruit 2.2" display */
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static int init_display(struct fbtft_par *par)
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{
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fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
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par->fbtftops.reset(par);
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write_reg(par, 0xEF, 0x03, 0x80, 0x02);
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write_reg(par, 0xCF, 0x00 , 0XC1 , 0X30);
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write_reg(par, 0xED, 0x64 , 0x03 , 0X12 , 0X81);
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write_reg(par, 0xE8, 0x85 , 0x00 , 0x78);
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write_reg(par, 0xCB, 0x39 , 0x2C , 0x00 , 0x34 , 0x02);
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write_reg(par, 0xF7, 0x20);
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write_reg(par, 0xEA, 0x00 , 0x00);
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/* Power Control 1 */
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write_reg(par, 0xC0, 0x23);
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/* Power Control 2 */
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write_reg(par, 0xC1, 0x10);
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/* VCOM Control 1 */
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write_reg(par, 0xC5, 0x3e, 0x28);
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/* VCOM Control 2 */
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write_reg(par, 0xC7, 0x86);
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/* COLMOD: Pixel Format Set */
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/* 16 bits/pixel */
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write_reg(par, 0x3A, 0x55);
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/* Frame Rate Control */
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/* Division ratio = fosc, Frame Rate = 79Hz */
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write_reg(par, 0xB1, 0x00, 0x18);
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/* Display Function Control */
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write_reg(par, 0xB6, 0x08, 0x82, 0x27);
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/* Gamma Function Disable */
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write_reg(par, 0xF2, 0x00);
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/* Gamma curve selected */
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write_reg(par, 0x26, 0x01);
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/* Positive Gamma Correction */
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write_reg(par, 0xE0,
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0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1,
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0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00);
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/* Negative Gamma Correction */
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write_reg(par, 0xE1,
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0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1,
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0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F);
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/* Sleep OUT */
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write_reg(par, 0x11);
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mdelay(120);
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/* Display ON */
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write_reg(par, 0x29);
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return 0;
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}
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static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
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{
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fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par,
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"%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye);
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/* Column address */
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write_reg(par, 0x2A, xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
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/* Row adress */
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write_reg(par, 0x2B, ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
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/* Memory write */
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write_reg(par, 0x2C);
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}
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#define ILI9340_MADCTL_MV 0x20
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#define ILI9340_MADCTL_MX 0x40
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#define ILI9340_MADCTL_MY 0x80
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static int set_var(struct fbtft_par *par)
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{
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u8 val;
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fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
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switch (par->info->var.rotate) {
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case 270:
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val = ILI9340_MADCTL_MV;
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break;
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case 180:
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val = ILI9340_MADCTL_MY;
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break;
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case 90:
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val = ILI9340_MADCTL_MV | ILI9340_MADCTL_MY | ILI9340_MADCTL_MX;
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break;
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default:
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val = ILI9340_MADCTL_MX;
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break;
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}
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/* Memory Access Control */
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write_reg(par, 0x36, val | (par->bgr << 3));
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return 0;
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}
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static struct fbtft_display display = {
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.regwidth = 8,
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.width = WIDTH,
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.height = HEIGHT,
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.fbtftops = {
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.init_display = init_display,
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.set_addr_win = set_addr_win,
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.set_var = set_var,
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},
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};
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FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9340", &display);
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MODULE_ALIAS("spi:" DRVNAME);
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MODULE_ALIAS("platform:" DRVNAME);
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MODULE_ALIAS("spi:ili9340");
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MODULE_ALIAS("platform:ili9340");
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MODULE_DESCRIPTION("FB driver for the ILI9340 LCD Controller");
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MODULE_AUTHOR("Noralf Tronnes");
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MODULE_LICENSE("GPL");
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