diff options
Diffstat (limited to 'drivers/staging/fbtft/fb_bd663474.c')
| -rw-r--r-- | drivers/staging/fbtft/fb_bd663474.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/drivers/staging/fbtft/fb_bd663474.c b/drivers/staging/fbtft/fb_bd663474.c new file mode 100644 index 000000000000..7e00c609c7fe --- /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"); |