Release 4.11 drivers/staging/fbtft/fb_ili9341.c
/*
* FB driver for the ILI9341 LCD display controller
*
* This display uses 9-bit SPI: Data/Command bit + 8 data bits
* For platforms that doesn't support 9-bit, the driver is capable
* of emulating this using 8-bit transfer.
* This is done by transferring eight 9-bit words in 9 bytes.
*
* Copyright (C) 2013 Christian Vogelgsang
* Based on adafruit22fb.c by Noralf Tronnes
*
* 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.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <video/mipi_display.h>
#include "fbtft.h"
#define DRVNAME "fb_ili9341"
#define WIDTH 240
#define HEIGHT 320
#define TXBUFLEN (4 * PAGE_SIZE)
#define DEFAULT_GAMMA "1F 1A 18 0A 0F 06 45 87 32 0A 07 02 07 05 00\n" \
"00 25 27 05 10 09 3A 78 4D 05 18 0D 38 3A 1F"
static int init_display(struct fbtft_par *par)
{
par->fbtftops.reset(par);
/* startup sequence for MI0283QT-9A */
write_reg(par, MIPI_DCS_SOFT_RESET);
mdelay(5);
write_reg(par, MIPI_DCS_SET_DISPLAY_OFF);
/* --------------------------------------------------------- */
write_reg(par, 0xCF, 0x00, 0x83, 0x30);
write_reg(par, 0xED, 0x64, 0x03, 0x12, 0x81);
write_reg(par, 0xE8, 0x85, 0x01, 0x79);
write_reg(par, 0xCB, 0x39, 0X2C, 0x00, 0x34, 0x02);
write_reg(par, 0xF7, 0x20);
write_reg(par, 0xEA, 0x00, 0x00);
/* ------------power control-------------------------------- */
write_reg(par, 0xC0, 0x26);
write_reg(par, 0xC1, 0x11);
/* ------------VCOM --------- */
write_reg(par, 0xC5, 0x35, 0x3E);
write_reg(par, 0xC7, 0xBE);
/* ------------memory access control------------------------ */
write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, 0x55); /* 16bit pixel */
/* ------------frame rate----------------------------------- */
write_reg(par, 0xB1, 0x00, 0x1B);
/* ------------Gamma---------------------------------------- */
/* write_reg(par, 0xF2, 0x08); */ /* Gamma Function Disable */
write_reg(par, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
/* ------------display-------------------------------------- */
write_reg(par, 0xB7, 0x07); /* entry mode set */
write_reg(par, 0xB6, 0x0A, 0x82, 0x27, 0x00);
write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
mdelay(100);
write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
mdelay(20);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Petazzoni | 241 | 97.57% | 1 | 50.00% |
| Priit Laes | 6 | 2.43% | 1 | 50.00% |
| Total | 247 | 100.00% | 2 | 100.00% |
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) & 0xFF, xs & 0xFF, (xe >> 8) & 0xFF, xe & 0xFF);
write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
(ys >> 8) & 0xFF, ys & 0xFF, (ye >> 8) & 0xFF, ye & 0xFF);
write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Petazzoni | 89 | 96.74% | 1 | 50.00% |
| Priit Laes | 3 | 3.26% | 1 | 50.00% |
| Total | 92 | 100.00% | 2 | 100.00% |
#define MEM_Y BIT(7)
/* MY row address order */
#define MEM_X BIT(6)
/* MX column address order */
#define MEM_V BIT(5)
/* MV row / column exchange */
#define MEM_L BIT(4)
/* ML vertical refresh order */
#define MEM_H BIT(2)
/* MH horizontal refresh order */
#define MEM_BGR (3)
/* RGB-BGR Order */
static int set_var(struct fbtft_par *par)
{
switch (par->info->var.rotate) {
case 0:
write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
MEM_X | (par->bgr << MEM_BGR));
break;
case 270:
write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
MEM_V | MEM_L | (par->bgr << MEM_BGR));
break;
case 180:
write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
MEM_Y | (par->bgr << MEM_BGR));
break;
case 90:
write_reg(par, MIPI_DCS_SET_ADDRESS_MODE,
MEM_Y | MEM_X | MEM_V | (par->bgr << MEM_BGR));
break;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Petazzoni | 112 | 96.55% | 1 | 50.00% |
| Priit Laes | 4 | 3.45% | 1 | 50.00% |
| Total | 116 | 100.00% | 2 | 100.00% |
/*
* Gamma string format:
* Positive: Par1 Par2 [...] Par15
* Negative: Par1 Par2 [...] Par15
*/
#define CURVE(num, idx) curves[num * par->gamma.num_values + idx]
static int set_gamma(struct fbtft_par *par, u32 *curves)
{
int i;
for (i = 0; i < par->gamma.num_curves; i++)
write_reg(par, 0xE0 + i,
CURVE(i, 0), CURVE(i, 1), CURVE(i, 2),
CURVE(i, 3), CURVE(i, 4), CURVE(i, 5),
CURVE(i, 6), CURVE(i, 7), CURVE(i, 8),
CURVE(i, 9), CURVE(i, 10), CURVE(i, 11),
CURVE(i, 12), CURVE(i, 13), CURVE(i, 14));
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Petazzoni | 151 | 99.34% | 1 | 50.00% |
| Arnd Bergmann | 1 | 0.66% | 1 | 50.00% |
| Total | 152 | 100.00% | 2 | 100.00% |
#undef CURVE
static struct fbtft_display display = {
.regwidth = 8,
.width = WIDTH,
.height = HEIGHT,
.txbuflen = TXBUFLEN,
.gamma_num = 2,
.gamma_len = 15,
.gamma = DEFAULT_GAMMA,
.fbtftops = {
.init_display = init_display,
.set_addr_win = set_addr_win,
.set_var = set_var,
.set_gamma = set_gamma,
},
};
FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9341", &display);
MODULE_ALIAS("spi:" DRVNAME);
MODULE_ALIAS("platform:" DRVNAME);
MODULE_ALIAS("spi:ili9341");
MODULE_ALIAS("platform:ili9341");
MODULE_DESCRIPTION("FB driver for the ILI9341 LCD display controller");
MODULE_AUTHOR("Christian Vogelgsang");
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Petazzoni | 778 | 96.89% | 1 | 16.67% |
| Priit Laes | 21 | 2.62% | 1 | 16.67% |
| Anish Bhatt | 2 | 0.25% | 2 | 33.33% |
| Arnd Bergmann | 1 | 0.12% | 1 | 16.67% |
| Eva Rachel Retuya | 1 | 0.12% | 1 | 16.67% |
| Total | 803 | 100.00% | 6 | 100.00% |
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