fb_s6d02a1.c

  1// SPDX-License-Identifier: GPL-2.0+
  2/*
  3 * FB driver for the S6D02A1 LCD Controller
  4 *
  5 * Based on fb_st7735r.c by Noralf Tronnes
  6 * Init code from UTFT library by Henning Karlsen
  7 */
  8
  9#include <linux/module.h>
 10#include <linux/kernel.h>
 11#include <linux/init.h>
 12#include <video/mipi_display.h>
 13
 14#include "fbtft.h"
 15
 16#define DRVNAME "fb_s6d02a1"
 17
 18static const s16 default_init_sequence[] = {
 19	-1, 0xf0, 0x5a, 0x5a,
 20
 21	-1, 0xfc, 0x5a, 0x5a,
 22
 23	-1, 0xfa, 0x02, 0x1f, 0x00, 0x10, 0x22, 0x30, 0x38,
 24	0x3A, 0x3A, 0x3A, 0x3A, 0x3A, 0x3d, 0x02, 0x01,
 25
 26	-1, 0xfb, 0x21, 0x00, 0x02, 0x04, 0x07, 0x0a, 0x0b,
 27	0x0c, 0x0c, 0x16, 0x1e, 0x30, 0x3f, 0x01, 0x02,
 28
 29	/* power setting sequence */
 30	-1, 0xfd, 0x00, 0x00, 0x00, 0x17, 0x10, 0x00, 0x01,
 31	0x01, 0x00, 0x1f, 0x1f,
 32
 33	-1, 0xf4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x3f,
 34	0x07, 0x00, 0x3C, 0x36, 0x00, 0x3C, 0x36, 0x00,
 35
 36	-1, 0xf5, 0x00, 0x70, 0x66, 0x00, 0x00, 0x00, 0x00,
 37	0x00, 0x00, 0x00, 0x6d, 0x66, 0x06,
 38
 39	-1, 0xf6, 0x02, 0x00, 0x3f, 0x00, 0x00, 0x00, 0x02,
 40	0x00, 0x06, 0x01, 0x00,
 41
 42	-1, 0xf2, 0x00, 0x01, 0x03, 0x08, 0x08, 0x04, 0x00,
 43	0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x04, 0x08, 0x08,
 44
 45	-1, 0xf8, 0x11,
 46
 47	-1, 0xf7, 0xc8, 0x20, 0x00, 0x00,
 48
 49	-1, 0xf3, 0x00, 0x00,
 50
 51	-1, MIPI_DCS_EXIT_SLEEP_MODE,
 52	-2, 50,
 53
 54	-1, 0xf3, 0x00, 0x01,
 55	-2, 50,
 56	-1, 0xf3, 0x00, 0x03,
 57	-2, 50,
 58	-1, 0xf3, 0x00, 0x07,
 59	-2, 50,
 60	-1, 0xf3, 0x00, 0x0f,
 61	-2, 50,
 62
 63	-1, 0xf4, 0x00, 0x04, 0x00, 0x00, 0x00, 0x3f, 0x3f,
 64	0x07, 0x00, 0x3C, 0x36, 0x00, 0x3C, 0x36, 0x00,
 65	-2, 50,
 66
 67	-1, 0xf3, 0x00, 0x1f,
 68	-2, 50,
 69	-1, 0xf3, 0x00, 0x7f,
 70	-2, 50,
 71
 72	-1, 0xf3, 0x00, 0xff,
 73	-2, 50,
 74
 75	-1, 0xfd, 0x00, 0x00, 0x00, 0x17, 0x10, 0x00, 0x00,
 76	0x01, 0x00, 0x16, 0x16,
 77
 78	-1, 0xf4, 0x00, 0x09, 0x00, 0x00, 0x00, 0x3f, 0x3f,
 79	0x07, 0x00, 0x3C, 0x36, 0x00, 0x3C, 0x36, 0x00,
 80
 81	/* initializing sequence */
 82
 83	-1, MIPI_DCS_SET_ADDRESS_MODE, 0x08,
 84
 85	-1, MIPI_DCS_SET_TEAR_ON, 0x00,
 86
 87	-1, MIPI_DCS_SET_PIXEL_FORMAT, 0x05,
 88
 89	/* gamma setting - possible values 0x01, 0x02, 0x04, 0x08 */
 90	-1, MIPI_DCS_SET_GAMMA_CURVE, 0x01,
 91
 92	-2, 150,
 93	-1, MIPI_DCS_SET_DISPLAY_ON,
 94	-1, MIPI_DCS_WRITE_MEMORY_START,
 95	/* end marker */
 96	-3
 97
 98};
 99
100static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
101{
102	write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
103		  xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
104
105	write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
106		  ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
107
108	write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
109}
110
111#define MY BIT(7)
112#define MX BIT(6)
113#define MV BIT(5)
114static int set_var(struct fbtft_par *par)
115{
116	/*
117	 * Memory data access control (0x36h)
118	 * RGB/BGR:
119	 *	1. Mode selection pin SRGB
120	 *		RGB H/W pin for color filter setting: 0=RGB, 1=BGR
121	 *	2. MADCTL RGB bit
122	 *		RGB-BGR ORDER color filter panel: 0=RGB, 1=BGR
123	 */
124	switch (par->info->var.rotate) {
125	case 0:
126		write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
127			  MX | MY | (par->bgr << 3));
128		break;
129	case 270:
130		write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
131			  MY | MV | (par->bgr << 3));
132		break;
133	case 180:
134		write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
135			  par->bgr << 3);
136		break;
137	case 90:
138		write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
139			  MX | MV | (par->bgr << 3));
140		break;
141	}
142
143	return 0;
144}
145
146static struct fbtft_display display = {
147	.regwidth = 8,
148	.width = 128,
149	.height = 160,
150	.init_sequence = default_init_sequence,
151	.fbtftops = {
152		.set_addr_win = set_addr_win,
153		.set_var = set_var,
154	},
155};
156
157FBTFT_REGISTER_DRIVER(DRVNAME, "samsung,s6d02a1", &display);
158
159MODULE_ALIAS("spi:" DRVNAME);
160MODULE_ALIAS("platform:" DRVNAME);
161MODULE_ALIAS("spi:s6d02a1");
162MODULE_ALIAS("platform:s6d02a1");
163
164MODULE_DESCRIPTION("FB driver for the S6D02A1 LCD Controller");
165MODULE_AUTHOR("WOLFGANG BUENING");
166MODULE_LICENSE("GPL");