staging: fbtft: add fb_bd663474 driver

This commit adds the fb_bd663474 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>

diff --git a/drivers/staging/fbtft/Kconfig b/drivers/staging/fbtft/Kconfig
index d552af65773291669416a85126e12ac566e91ee9..400492a5f6407d74b846a3190577cb4acdd1dbad 100644 (file)
--- a/drivers/staging/fbtft/Kconfig
+++ b/drivers/staging/fbtft/Kconfig
@@ -13,3 +13,9 @@ config FB_TFT_AGM1264K_FL
        depends on FB_TFT
        help
          Framebuffer support for the AGM1264K-FL LCD display (two Samsung KS0108 compatable chips)
+
+config FB_TFT_BD663474
+       tristate "FB driver for the BD663474 LCD Controller"
+       depends on FB_TFT
+       help
+         Generic Framebuffer support for BD663474

diff --git a/drivers/staging/fbtft/Makefile b/drivers/staging/fbtft/Makefile
index eb13cc545747abad2363000d881ae9057b888651..9f80a6ecd60c605e1cc1793d665a71771782d08f 100644 (file)
--- a/drivers/staging/fbtft/Makefile
+++ b/drivers/staging/fbtft/Makefile
@@ -4,3 +4,4 @@ fbtft-y                          += fbtft-core.o fbtft-sysfs.o fbtft-bus.o fbtft
 
 # drivers
 obj-$(CONFIG_FB_TFT_AGM1264K_FL) += fb_agm1264k-fl.o
+obj-$(CONFIG_FB_TFT_BD663474)    += fb_bd663474.o

diff --git a/drivers/staging/fbtft/fb_bd663474.c b/drivers/staging/fbtft/fb_bd663474.c
new file mode 100644 (file)
index 0000000..7e00c60
--- /dev/null
+++ b/drivers/staging/fbtft/fb_bd663474.c
@@ -0,0 +1,193 @@
+/*
+ * FB driver for the uPD161704 LCD Controller
+ *
+ * Copyright (C) 2014 Seong-Woo Kim
+ *
+ * Based on fb_ili9325.c by Noralf Tronnes
+ * Based on ili9325.c by Jeroen Domburg
+ * Init code from UTFT library by Henning Karlsen
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+
+#include "fbtft.h"
+
+#define DRVNAME                "fb_bd663474"
+#define WIDTH          240
+#define HEIGHT         320
+#define BPP            16
+
+static int init_display(struct fbtft_par *par)
+{
+       fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
+
+       if (par->gpio.cs != -1)
+               gpio_set_value(par->gpio.cs, 0);  /* Activate chip */
+
+       par->fbtftops.reset(par);
+
+       /* Initialization sequence from Lib_UTFT */
+
+       /* oscillator start */
+       write_reg(par, 0x000,0x0001);   /*oscillator 0: stop, 1: operation */
+       mdelay(10);
+
+       /* Power settings */
+       write_reg(par, 0x100, 0x0000 ); /* power supply setup */
+       write_reg(par, 0x101, 0x0000 );
+       write_reg(par, 0x102, 0x3110 );
+       write_reg(par, 0x103, 0xe200 );
+       write_reg(par, 0x110, 0x009d );
+       write_reg(par, 0x111, 0x0022 );
+       write_reg(par, 0x100, 0x0120 );
+       mdelay( 20 );
+
+       write_reg(par, 0x100, 0x3120 );
+       mdelay( 80 );
+       /* Display control */
+       write_reg(par, 0x001, 0x0100 );
+       write_reg(par, 0x002, 0x0000 );
+       write_reg(par, 0x003, 0x1230 );
+       write_reg(par, 0x006, 0x0000 );
+       write_reg(par, 0x007, 0x0101 );
+       write_reg(par, 0x008, 0x0808 );
+       write_reg(par, 0x009, 0x0000 );
+       write_reg(par, 0x00b, 0x0000 );
+       write_reg(par, 0x00c, 0x0000 );
+       write_reg(par, 0x00d, 0x0018 );
+       /* LTPS control settings */
+       write_reg(par, 0x012, 0x0000 );
+       write_reg(par, 0x013, 0x0000 );
+       write_reg(par, 0x018, 0x0000 );
+       write_reg(par, 0x019, 0x0000 );
+
+       write_reg(par, 0x203, 0x0000 );
+       write_reg(par, 0x204, 0x0000 );
+
+       write_reg(par, 0x210, 0x0000 );
+       write_reg(par, 0x211, 0x00ef );
+       write_reg(par, 0x212, 0x0000 );
+       write_reg(par, 0x213, 0x013f );
+       write_reg(par, 0x214, 0x0000 );
+       write_reg(par, 0x215, 0x0000 );
+       write_reg(par, 0x216, 0x0000 );
+       write_reg(par, 0x217, 0x0000 );
+
+       /* Gray scale settings */
+       write_reg(par, 0x300, 0x5343);
+       write_reg(par, 0x301, 0x1021);
+       write_reg(par, 0x302, 0x0003);
+       write_reg(par, 0x303, 0x0011);
+       write_reg(par, 0x304, 0x050a);
+       write_reg(par, 0x305, 0x4342);
+       write_reg(par, 0x306, 0x1100);
+       write_reg(par, 0x307, 0x0003);
+       write_reg(par, 0x308, 0x1201);
+       write_reg(par, 0x309, 0x050a);
+
+       /* RAM access settings */
+       write_reg(par, 0x400, 0x4027 );
+       write_reg(par, 0x401, 0x0000 );
+       write_reg(par, 0x402, 0x0000 );  /* First screen drive position (1) */
+       write_reg(par, 0x403, 0x013f );  /* First screen drive position (2) */
+       write_reg(par, 0x404, 0x0000 );
+
+       write_reg(par, 0x200, 0x0000 );
+       write_reg(par, 0x201, 0x0000 );
+       write_reg(par, 0x100, 0x7120 );
+       write_reg(par, 0x007, 0x0103 );
+       mdelay( 10 );
+       write_reg(par, 0x007, 0x0113 );
+
+       return 0;
+}
+
+static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
+{
+       fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par,
+               "%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye);
+       switch (par->info->var.rotate) {
+       /* R200h = Horizontal GRAM Start Address */
+       /* R201h = Vertical GRAM Start Address */
+       case 0:
+               write_reg(par, 0x0200, xs);
+               write_reg(par, 0x0201, ys);
+               break;
+       case 180:
+               write_reg(par, 0x0200, WIDTH - 1 - xs);
+               write_reg(par, 0x0201, HEIGHT - 1 - ys);
+               break;
+       case 270:
+               write_reg(par, 0x0200, WIDTH - 1 - ys);
+               write_reg(par, 0x0201, xs);
+               break;
+       case 90:
+               write_reg(par, 0x0200, ys);
+               write_reg(par, 0x0201, HEIGHT - 1 - xs);
+               break;
+       }
+       write_reg(par, 0x202); /* Write Data to GRAM */
+}
+
+static int set_var(struct fbtft_par *par)
+{
+       fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
+
+       switch (par->info->var.rotate) {
+       /* AM: GRAM update direction */
+       case 0:
+               write_reg(par, 0x003, 0x1230);
+               break;
+       case 180:
+               write_reg(par, 0x003, 0x1200);
+               break;
+       case 270:
+               write_reg(par, 0x003, 0x1228);
+               break;
+       case 90:
+               write_reg(par, 0x003, 0x1218);
+               break;
+       }
+
+       return 0;
+}
+
+static struct fbtft_display display = {
+       .regwidth = 16,
+       .width = WIDTH,
+       .height = HEIGHT,
+       .bpp = BPP,
+       .fbtftops = {
+               .init_display = init_display,
+               .set_addr_win = set_addr_win,
+               .set_var = set_var,
+       },
+};
+FBTFT_REGISTER_DRIVER(DRVNAME, "hitachi,bd663474", &display);
+
+MODULE_ALIAS("spi:" DRVNAME);
+MODULE_ALIAS("platform:" DRVNAME);
+MODULE_ALIAS("spi:bd663474");
+MODULE_ALIAS("platform:bd663474");
+
+MODULE_DESCRIPTION("FB driver for the uPD161704 LCD Controller");
+MODULE_AUTHOR("Seong-Woo Kim");
+MODULE_LICENSE("GPL");