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ODROID-COMMON: staging/fbtft: Add fb_hktft32 module for Hardkernel 3.2 inch TFT LCD

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This is for Odroid-N2/C4. Slightly different from the one for Odroid-XU4.

Signed-off-by: Deokgyu Yang <secugyu@gmail.com>
Change-Id: I615bd5494191c69c75fe6c98d399ebad27fac80b
This commit is contained in:
Deokgyu Yang
2019-11-21 15:17:36 +09:00
parent 8d4a280349
commit 677244d300
3 changed files with 153 additions and 4 deletions
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7
drivers/staging/fbtft/Kconfig
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@@ -215,3 +215,10 @@ config FB_TFT_HKTFT35
help
Generic Framebuffer support for the Hardkernel 3.5 inch TFT LCD
that uses the ILI9488 LCD Controller
config FB_TFT_HKTFT32
tristate "FB driver for the Hardkernel 3.2 inch TFT LCD"
depends on FB_TFT
help
Generic Framebuffer support for the Hardkernel 3.2 inch TFT LCD
that uses the ILI9340 LCD Controller

5
drivers/staging/fbtft/Makefile
View File

@@ -35,7 +35,4 @@ obj-$(CONFIG_FB_TFT_UC1701) += fb_uc1701.o
obj-$(CONFIG_FB_TFT_UPD161704) += fb_upd161704.o
obj-$(CONFIG_FB_TFT_WATTEROTT) += fb_watterott.o
obj-$(CONFIG_FB_TFT_HKTFT35) += fb_hktft35.o
obj-$(CONFIG_FB_FLEX) += flexfb.o
# Device modules
obj-$(CONFIG_FB_TFT_FBTFT_DEVICE) += fbtft_device.o
obj-$(CONFIG_FB_TFT_HKTFT32) += fb_hktft32.o

145
drivers/staging/fbtft/fb_hktft32.c Normal file
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@@ -0,0 +1,145 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* FB driver for the Hardkernel 3.2 inch TFT LCD
* that uses the ILI9340 LCD Controller
* for Odroid-N2/C4 using kernel 4.9
*
* Copyright (C) 2020 Deokgyu Yang
*
* Based on fb_ili9340.c by Noralf Tronnes
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/gpio/consumer.h>
#include <linux/delay.h>
#include <video/mipi_display.h>
#include "fbtft.h"
#define DRVNAME "fb_hktft32"
#define WIDTH 240
#define HEIGHT 320
/* Init sequence taken from: Arduino Library for the Adafruit 2.2" display */
static int init_display(struct fbtft_par *par)
{
par->fbtftops.reset(par);
write_reg(par, 0xEF, 0x03, 0x80, 0x02);
write_reg(par, 0xCF, 0x00, 0XC1, 0X30);
write_reg(par, 0xED, 0x64, 0x03, 0X12, 0X81);
write_reg(par, 0xE8, 0x85, 0x00, 0x78);
write_reg(par, 0xCB, 0x39, 0x2C, 0x00, 0x34, 0x02);
write_reg(par, 0xF7, 0x20);
write_reg(par, 0xEA, 0x00, 0x00);
/* Power Control 1 */
write_reg(par, 0xC0, 0x23);
/* Power Control 2 */
write_reg(par, 0xC1, 0x10);
/* VCOM Control 1 */
write_reg(par, 0xC5, 0x3e, 0x28);
/* VCOM Control 2 */
write_reg(par, 0xC7, 0x86);
/* COLMOD: Pixel Format Set */
/* 16 bits/pixel */
write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, 0x55);
/* Frame Rate Control */
/* Division ratio = fosc, Frame Rate = 79Hz */
write_reg(par, 0xB1, 0x00, 0x18);
/* Display Function Control */
write_reg(par, 0xB6, 0x08, 0x82, 0x27);
/* Gamma Function Disable */
write_reg(par, 0xF2, 0x00);
/* Gamma curve selection */
write_reg(par, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
/* Positive Gamma Correction */
write_reg(par, 0xE0,
0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1,
0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00);
/* Negative Gamma Correction */
write_reg(par, 0xE1,
0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1,
0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F);
write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
mdelay(120);
write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
return 0;
}
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 ILI9340_MADCTL_MV 0x20
#define ILI9340_MADCTL_MX 0x40
#define ILI9340_MADCTL_MY 0x80
static int set_var(struct fbtft_par *par)
{
u8 val;
switch (par->info->var.rotate) {
case 270:
val = ILI9340_MADCTL_MV;
break;
case 180:
val = ILI9340_MADCTL_MY;
break;
case 90:
val = ILI9340_MADCTL_MV | ILI9340_MADCTL_MY | ILI9340_MADCTL_MX;
break;
default:
val = ILI9340_MADCTL_MX;
break;
}
/* Memory Access Control */
write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, val | (par->bgr << 3));
return 0;
}
static struct fbtft_display display = {
.regwidth = 8,
.buswidth = 8,
.width = WIDTH,
.height = HEIGHT,
.fbtftops = {
.init_display = init_display,
.set_addr_win = set_addr_win,
.set_var = set_var,
},
};
FBTFT_REGISTER_DRIVER(DRVNAME, "odroid,hktft32", &display);
MODULE_ALIAS("spi:" DRVNAME);
MODULE_ALIAS("platform:" DRVNAME);
MODULE_ALIAS("spi:hktft32");
MODULE_ALIAS("platform:hktft32");
MODULE_DESCRIPTION("FB driver for the Hardkernel 3.2 inch TFT LCD uses the ILI9340 LCD Controller");
MODULE_AUTHOR("Deokgyu Yang");
MODULE_LICENSE("GPL");