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staging: fbtft: add fb_tinylcd driver
This commit adds the fb_tinylcd 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
735d98cdb8
commit
ef8f9ab5b2
3 changed files with 131 additions and 0 deletions
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@ -127,3 +127,9 @@ config FB_TFT_ST7735R
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depends on FB_TFT
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help
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Generic Framebuffer support for ST7735R
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config FB_TFT_TINYLCD
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tristate "FB driver for tinylcd.com display"
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depends on FB_TFT
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help
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Custom Framebuffer support for tinylcd.com display
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@ -23,3 +23,4 @@ obj-$(CONFIG_FB_TFT_SSD1306) += fb_ssd1306.o
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obj-$(CONFIG_FB_TFT_SSD1331) += fb_ssd1331.o
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obj-$(CONFIG_FB_TFT_SSD1351) += fb_ssd1351.o
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obj-$(CONFIG_FB_TFT_ST7735R) += fb_st7735r.o
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obj-$(CONFIG_FB_TFT_TINYLCD) += fb_tinylcd.o
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124
drivers/staging/fbtft/fb_tinylcd.c
Normal file
124
drivers/staging/fbtft/fb_tinylcd.c
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@ -0,0 +1,124 @@
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/*
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* Custom FB driver for tinylcd.com display
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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/delay.h>
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#include "fbtft.h"
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#define DRVNAME "fb_tinylcd"
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#define WIDTH 320
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#define HEIGHT 480
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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, 0xB0, 0x80);
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write_reg(par, 0xC0, 0x0A, 0x0A);
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write_reg(par, 0xC1, 0x45, 0x07);
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write_reg(par, 0xC2, 0x33);
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write_reg(par, 0xC5, 0x00, 0x42, 0x80);
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write_reg(par, 0xB1, 0xD0, 0x11);
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write_reg(par, 0xB4, 0x02);
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write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
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write_reg(par, 0xB7, 0x07);
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write_reg(par, 0x36, 0x58);
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write_reg(par, 0xF0, 0x36, 0xA5, 0xD3);
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write_reg(par, 0xE5, 0x80);
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write_reg(par, 0xE5, 0x01);
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write_reg(par, 0xB3, 0x00);
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write_reg(par, 0xE5, 0x00);
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write_reg(par, 0xF0, 0x36, 0xA5, 0x53);
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write_reg(par, 0xE0, 0x00, 0x35, 0x33, 0x00, 0x00, 0x00,
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0x00, 0x35, 0x33, 0x00, 0x00, 0x00);
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write_reg(par, 0x3A, 0x55);
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write_reg(par, 0x11);
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udelay(250);
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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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static int set_var(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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switch (par->info->var.rotate) {
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case 270:
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write_reg(par, 0xB6, 0x00, 0x02, 0x3B);
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write_reg(par, 0x36, 0x28);
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break;
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case 180:
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write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
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write_reg(par, 0x36, 0x58);
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break;
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case 90:
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write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
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write_reg(par, 0x36, 0x38);
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break;
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default:
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write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
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write_reg(par, 0x36, 0x08);
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break;
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}
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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, "neosec,tinylcd", &display);
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MODULE_ALIAS("spi:" DRVNAME);
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MODULE_ALIAS("spi:tinylcd");
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MODULE_DESCRIPTION("Custom FB driver for tinylcd.com display");
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MODULE_AUTHOR("Noralf Tronnes");
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MODULE_LICENSE("GPL");
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