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staging: fbtft: add fb_ssd1289 driver
This commit adds the fb_ssd1289 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
7a39e9654b
commit
5dc5e4fb11
@ -97,3 +97,9 @@ config FB_TFT_S6D1121
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depends on FB_TFT
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help
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Generic Framebuffer support for S6D1121
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config FB_TFT_SSD1289
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tristate "FB driver for the SSD1289 LCD Controller"
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depends on FB_TFT
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help
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Framebuffer support for SSD1289
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@ -18,3 +18,4 @@ obj-$(CONFIG_FB_TFT_PCD8544) += fb_pcd8544.o
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obj-$(CONFIG_FB_TFT_RA8875) += fb_ra8875.o
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obj-$(CONFIG_FB_TFT_S6D02A1) += fb_s6d02a1.o
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obj-$(CONFIG_FB_TFT_S6D1121) += fb_s6d1121.o
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obj-$(CONFIG_FB_TFT_SSD1289) += fb_ssd1289.o
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206
drivers/staging/fbtft/fb_ssd1289.c
Normal file
206
drivers/staging/fbtft/fb_ssd1289.c
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@ -0,0 +1,206 @@
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/*
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* FB driver for the SSD1289 LCD Controller
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*
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* Copyright (C) 2013 Noralf Tronnes
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*
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* Init sequence taken from ITDB02_Graph16.cpp - (C)2010-2011 Henning Karlsen
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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 "fbtft.h"
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#define DRVNAME "fb_ssd1289"
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#define WIDTH 240
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#define HEIGHT 320
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#define DEFAULT_GAMMA "02 03 2 5 7 7 4 2 4 2\n" \
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"02 03 2 5 7 5 4 2 4 2"
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static unsigned reg11 = 0x6040;
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module_param(reg11, uint, 0);
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MODULE_PARM_DESC(reg11, "Register 11h value");
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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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if (par->gpio.cs != -1)
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gpio_set_value(par->gpio.cs, 0); /* Activate chip */
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write_reg(par, 0x00, 0x0001);
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write_reg(par, 0x03, 0xA8A4);
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write_reg(par, 0x0C, 0x0000);
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write_reg(par, 0x0D, 0x080C);
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write_reg(par, 0x0E, 0x2B00);
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write_reg(par, 0x1E, 0x00B7);
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write_reg(par, 0x01,
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(1 << 13) | (par->bgr << 11) | (1 << 9) | (HEIGHT - 1));
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write_reg(par, 0x02, 0x0600);
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write_reg(par, 0x10, 0x0000);
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write_reg(par, 0x05, 0x0000);
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write_reg(par, 0x06, 0x0000);
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write_reg(par, 0x16, 0xEF1C);
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write_reg(par, 0x17, 0x0003);
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write_reg(par, 0x07, 0x0233);
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write_reg(par, 0x0B, 0x0000);
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write_reg(par, 0x0F, 0x0000);
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write_reg(par, 0x41, 0x0000);
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write_reg(par, 0x42, 0x0000);
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write_reg(par, 0x48, 0x0000);
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write_reg(par, 0x49, 0x013F);
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write_reg(par, 0x4A, 0x0000);
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write_reg(par, 0x4B, 0x0000);
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write_reg(par, 0x44, 0xEF00);
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write_reg(par, 0x45, 0x0000);
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write_reg(par, 0x46, 0x013F);
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write_reg(par, 0x23, 0x0000);
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write_reg(par, 0x24, 0x0000);
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write_reg(par, 0x25, 0x8000);
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write_reg(par, 0x4f, 0x0000);
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write_reg(par, 0x4e, 0x0000);
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write_reg(par, 0x22);
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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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switch (par->info->var.rotate) {
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/* R4Eh - Set GDDRAM X address counter */
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/* R4Fh - Set GDDRAM Y address counter */
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case 0:
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write_reg(par, 0x4e, xs);
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write_reg(par, 0x4f, ys);
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break;
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case 180:
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write_reg(par, 0x4e, par->info->var.xres - 1 - xs);
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write_reg(par, 0x4f, par->info->var.yres - 1 - ys);
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break;
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case 270:
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write_reg(par, 0x4e, par->info->var.yres - 1 - ys);
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write_reg(par, 0x4f, xs);
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break;
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case 90:
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write_reg(par, 0x4e, ys);
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write_reg(par, 0x4f, par->info->var.xres - 1 - xs);
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break;
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}
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/* R22h - RAM data write */
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write_reg(par, 0x22);
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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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if (par->fbtftops.init_display != init_display) {
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/* don't risk messing up register 11h */
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fbtft_par_dbg(DEBUG_INIT_DISPLAY, par,
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"%s: skipping since custom init_display() is used\n",
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__func__);
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return 0;
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}
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switch (par->info->var.rotate) {
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case 0:
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write_reg(par, 0x11, reg11 | 0b110000);
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break;
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case 270:
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write_reg(par, 0x11, reg11 | 0b101000);
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break;
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case 180:
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write_reg(par, 0x11, reg11 | 0b000000);
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break;
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case 90:
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write_reg(par, 0x11, reg11 | 0b011000);
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break;
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}
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return 0;
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}
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/*
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Gamma string format:
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VRP0 VRP1 PRP0 PRP1 PKP0 PKP1 PKP2 PKP3 PKP4 PKP5
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VRN0 VRN1 PRN0 PRN1 PKN0 PKN1 PKN2 PKN3 PKN4 PKN5
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*/
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#define CURVE(num, idx) curves[num*par->gamma.num_values + idx]
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static int set_gamma(struct fbtft_par *par, unsigned long *curves)
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{
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unsigned long mask[] = {
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0b11111, 0b11111, 0b111, 0b111, 0b111,
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0b111, 0b111, 0b111, 0b111, 0b111,
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0b11111, 0b11111, 0b111, 0b111, 0b111,
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0b111, 0b111, 0b111, 0b111, 0b111 };
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int i, j;
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fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
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/* apply mask */
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for (i = 0; i < 2; i++)
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for (j = 0; j < 10; j++)
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CURVE(i, j) &= mask[i*par->gamma.num_values + j];
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write_reg(par, 0x0030, CURVE(0, 5) << 8 | CURVE(0, 4));
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write_reg(par, 0x0031, CURVE(0, 7) << 8 | CURVE(0, 6));
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write_reg(par, 0x0032, CURVE(0, 9) << 8 | CURVE(0, 8));
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write_reg(par, 0x0033, CURVE(0, 3) << 8 | CURVE(0, 2));
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write_reg(par, 0x0034, CURVE(1, 5) << 8 | CURVE(1, 4));
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write_reg(par, 0x0035, CURVE(1, 7) << 8 | CURVE(1, 6));
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write_reg(par, 0x0036, CURVE(1, 9) << 8 | CURVE(1, 8));
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write_reg(par, 0x0037, CURVE(1, 3) << 8 | CURVE(1, 2));
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write_reg(par, 0x003A, CURVE(0, 1) << 8 | CURVE(0, 0));
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write_reg(par, 0x003B, CURVE(1, 1) << 8 | CURVE(1, 0));
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return 0;
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}
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#undef CURVE
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static struct fbtft_display display = {
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.regwidth = 16,
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.width = WIDTH,
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.height = HEIGHT,
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.gamma_num = 2,
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.gamma_len = 10,
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.gamma = DEFAULT_GAMMA,
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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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.set_gamma = set_gamma,
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},
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};
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FBTFT_REGISTER_DRIVER(DRVNAME, "solomon,ssd1289", &display);
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MODULE_ALIAS("spi:" DRVNAME);
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MODULE_ALIAS("platform:" DRVNAME);
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MODULE_ALIAS("spi:ssd1289");
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MODULE_ALIAS("platform:ssd1289");
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MODULE_DESCRIPTION("FB driver for the SSD1289 LCD Controller");
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MODULE_AUTHOR("Noralf Tronnes");
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MODULE_LICENSE("GPL");
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