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// SPDX-License-Identifier: GPL-2.0+
/*
* FB driver for the S6D02A1 LCD Controller
*
* Based on fb_st7735r.c by Noralf Tronnes
* Init code from UTFT library by Henning Karlsen
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <video/mipi_display.h>
#include "fbtft.h"
#define DRVNAME "fb_s6d02a1"
static const s16 default_init_sequence[] = {
-1, 0xf0, 0x5a, 0x5a,
-1, 0xfc, 0x5a, 0x5a,
-1, 0xfa, 0x02, 0x1f, 0x00, 0x10, 0x22, 0x30, 0x38,
0x3A, 0x3A, 0x3A, 0x3A, 0x3A, 0x3d, 0x02, 0x01,
-1, 0xfb, 0x21, 0x00, 0x02, 0x04, 0x07, 0x0a, 0x0b,
0x0c, 0x0c, 0x16, 0x1e, 0x30, 0x3f, 0x01, 0x02,
/* power setting sequence */
-1, 0xfd, 0x00, 0x00, 0x00, 0x17, 0x10, 0x00, 0x01,
0x01, 0x00, 0x1f, 0x1f,
-1, 0xf4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x3f,
0x07, 0x00, 0x3C, 0x36, 0x00, 0x3C, 0x36, 0x00,
-1, 0xf5, 0x00, 0x70, 0x66, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x6d, 0x66, 0x06,
-1, 0xf6, 0x02, 0x00, 0x3f, 0x00, 0x00, 0x00, 0x02,
0x00, 0x06, 0x01, 0x00,
-1, 0xf2, 0x00, 0x01, 0x03, 0x08, 0x08, 0x04, 0x00,
0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x04, 0x08, 0x08,
-1, 0xf8, 0x11,
-1, 0xf7, 0xc8, 0x20, 0x00, 0x00,
-1, 0xf3, 0x00, 0x00,
-1, MIPI_DCS_EXIT_SLEEP_MODE,
-2, 50,
-1, 0xf3, 0x00, 0x01,
-2, 50,
-1, 0xf3, 0x00, 0x03,
-2, 50,
-1, 0xf3, 0x00, 0x07,
-2, 50,
-1, 0xf3, 0x00, 0x0f,
-2, 50,
-1, 0xf4, 0x00, 0x04, 0x00, 0x00, 0x00, 0x3f, 0x3f,
0x07, 0x00, 0x3C, 0x36, 0x00, 0x3C, 0x36, 0x00,
-2, 50,
-1, 0xf3, 0x00, 0x1f,
-2, 50,
-1, 0xf3, 0x00, 0x7f,
-2, 50,
-1, 0xf3, 0x00, 0xff,
-2, 50,
-1, 0xfd, 0x00, 0x00, 0x00, 0x17, 0x10, 0x00, 0x00,
0x01, 0x00, 0x16, 0x16,
-1, 0xf4, 0x00, 0x09, 0x00, 0x00, 0x00, 0x3f, 0x3f,
0x07, 0x00, 0x3C, 0x36, 0x00, 0x3C, 0x36, 0x00,
/* initializing sequence */
-1, MIPI_DCS_SET_ADDRESS_MODE, 0x08,
-1, MIPI_DCS_SET_TEAR_ON, 0x00,
-1, MIPI_DCS_SET_PIXEL_FORMAT, 0x05,
/* gamma setting - possible values 0x01, 0x02, 0x04, 0x08 */
-1, MIPI_DCS_SET_GAMMA_CURVE, 0x01,
-2, 150,
-1, MIPI_DCS_SET_DISPLAY_ON,
-1, MIPI_DCS_WRITE_MEMORY_START,
/* end marker */
-3
};
static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
{
write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
}
#define MY BIT(7)
#define MX BIT(6)
#define MV BIT(5)
static int set_var(struct fbtft_par *par)
{
/*
* Memory data access control (0x36h)
* RGB/BGR:
* 1. Mode selection pin SRGB
* RGB H/W pin for color filter setting: 0=RGB, 1=BGR
* 2. MADCTL RGB bit
* RGB-BGR ORDER color filter panel: 0=RGB, 1=BGR
*/
switch (par->info->var.rotate) {
case 0:
write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
MX | MY | (par->bgr << 3));
break;
case 270:
write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
MY | MV | (par->bgr << 3));
break;
case 180:
write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
par->bgr << 3);
break;
case 90:
write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
MX | MV | (par->bgr << 3));
break;
}
return 0;
}
static struct fbtft_display display = {
.regwidth = 8,
.width = 128,
.height = 160,
.init_sequence = default_init_sequence,
.fbtftops = {
.set_addr_win = set_addr_win,
.set_var = set_var,
},
};
FBTFT_REGISTER_DRIVER(DRVNAME, "samsung,s6d02a1", &display);
MODULE_ALIAS("spi:" DRVNAME);
MODULE_ALIAS("platform:" DRVNAME);
MODULE_ALIAS("spi:s6d02a1");
MODULE_ALIAS("platform:s6d02a1");
MODULE_DESCRIPTION("FB driver for the S6D02A1 LCD Controller");
MODULE_AUTHOR("WOLFGANG BUENING");
MODULE_LICENSE("GPL");
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