215 lines
5.8 KiB
Diff
215 lines
5.8 KiB
Diff
From da67b773b1fcd150b4fce3af576ca96813cbf334 Mon Sep 17 00:00:00 2001
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From: Yang Deokgyu <secugyu@gmail.com>
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Date: Thu, 21 Nov 2019 15:17:36 +0900
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Subject: [PATCH 28/75] ODROID-XU4: drivers/fbtft: Add fb_hktft32 module for
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Hardkernel 3.2 inch TFT LCD
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No longer use flexfb, fbtft_device that is deprecated since kernel 5.4.
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Signed-off-by: Yang Deokgyu <secugyu@gmail.com>
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Change-Id: Iebd014360f90eab5210722102d54c6169be5e28e
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---
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drivers/staging/fbtft/Kconfig | 14 +++
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drivers/staging/fbtft/Makefile | 2 +
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drivers/staging/fbtft/fb_hktft32.c | 156 +++++++++++++++++++++++++++++
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3 files changed, 172 insertions(+)
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create mode 100644 drivers/staging/fbtft/fb_hktft32.c
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diff --git a/drivers/staging/fbtft/Kconfig b/drivers/staging/fbtft/Kconfig
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index dad1ddcd7b0c..408ef1a2f978 100644
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--- a/drivers/staging/fbtft/Kconfig
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+++ b/drivers/staging/fbtft/Kconfig
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@@ -206,3 +206,17 @@ config FB_TFT_WATTEROTT
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depends on FB_TFT
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help
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Generic Framebuffer support for WATTEROTT
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+
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+config FB_TFT_HKTFT35
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+ tristate "FB driver for the Hardkernel 3.5 inch TFT LCD"
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+ depends on FB_TFT
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+ help
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+ Generic Framebuffer support for the Hardkernel 3.5 inch TFT LCD
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+ that uses the ILI9488 LCD Controller
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+
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+config FB_TFT_HKTFT32
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+ tristate "FB driver for the Hardkernel 3.2 inch TFT LCD"
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+ depends on FB_TFT
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+ help
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+ Generic Framebuffer support for the Hardkernel 3.2 inch TFT LCD
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+ that uses the ILI9340 LCD Controller
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diff --git a/drivers/staging/fbtft/Makefile b/drivers/staging/fbtft/Makefile
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index e87193f7df14..34a5a14d1ab4 100644
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--- a/drivers/staging/fbtft/Makefile
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+++ b/drivers/staging/fbtft/Makefile
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@@ -37,3 +37,5 @@ obj-$(CONFIG_FB_TFT_UC1611) += fb_uc1611.o
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obj-$(CONFIG_FB_TFT_UC1701) += fb_uc1701.o
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obj-$(CONFIG_FB_TFT_UPD161704) += fb_upd161704.o
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obj-$(CONFIG_FB_TFT_WATTEROTT) += fb_watterott.o
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+obj-$(CONFIG_FB_TFT_HKTFT35) += fb_hktft35.o
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+obj-$(CONFIG_FB_TFT_HKTFT32) += fb_hktft32.o
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diff --git a/drivers/staging/fbtft/fb_hktft32.c b/drivers/staging/fbtft/fb_hktft32.c
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new file mode 100644
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index 000000000000..33ac19603cad
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--- /dev/null
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+++ b/drivers/staging/fbtft/fb_hktft32.c
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@@ -0,0 +1,156 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/*
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+ * FB driver for the Hardkernel 3.2 inch TFT LCD
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+ * that uses the ILI9340 LCD Controller
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+ *
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+ * Copyright (C) 2019 Yang Deokgyu
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+ *
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+ * Based on fb_ili9340.c by Noralf Tronnes
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/kernel.h>
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+#include <linux/init.h>
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+#include <linux/gpio/consumer.h>
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+#include <linux/delay.h>
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+#include <video/mipi_display.h>
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+
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+#include "fbtft.h"
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+
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+#define DRVNAME "fb_hktft32"
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+#define WIDTH 240
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+#define HEIGHT 320
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+
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+/* Init sequence taken from: Arduino Library for the Adafruit 2.2" display */
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+static int init_display(struct fbtft_par *par)
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+{
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+ par->fbtftops.reset(par);
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+
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+ write_reg(par, 0xEF, 0x03, 0x80, 0x02);
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+ write_reg(par, 0xCF, 0x00, 0XC1, 0X30);
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+ write_reg(par, 0xED, 0x64, 0x03, 0X12, 0X81);
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+ write_reg(par, 0xE8, 0x85, 0x00, 0x78);
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+ write_reg(par, 0xCB, 0x39, 0x2C, 0x00, 0x34, 0x02);
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+ write_reg(par, 0xF7, 0x20);
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+ write_reg(par, 0xEA, 0x00, 0x00);
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+
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+ /* Power Control 1 */
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+ write_reg(par, 0xC0, 0x23);
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+
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+ /* Power Control 2 */
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+ write_reg(par, 0xC1, 0x10);
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+
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+ /* VCOM Control 1 */
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+ write_reg(par, 0xC5, 0x3e, 0x28);
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+
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+ /* VCOM Control 2 */
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+ write_reg(par, 0xC7, 0x86);
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+
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+ /* COLMOD: Pixel Format Set */
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+ /* 16 bits/pixel */
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+ write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, 0x55);
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+
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+ /* Frame Rate Control */
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+ /* Division ratio = fosc, Frame Rate = 79Hz */
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+ write_reg(par, 0xB1, 0x00, 0x18);
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+
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+ /* Display Function Control */
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+ write_reg(par, 0xB6, 0x08, 0x82, 0x27);
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+
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+ /* Gamma Function Disable */
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+ write_reg(par, 0xF2, 0x00);
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+
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+ /* Gamma curve selection */
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+ write_reg(par, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
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+
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+ /* Positive Gamma Correction */
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+ write_reg(par, 0xE0,
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+ 0x0F, 0x31, 0x2B, 0x0C, 0x0E, 0x08, 0x4E, 0xF1,
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+ 0x37, 0x07, 0x10, 0x03, 0x0E, 0x09, 0x00);
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+
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+ /* Negative Gamma Correction */
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+ write_reg(par, 0xE1,
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+ 0x00, 0x0E, 0x14, 0x03, 0x11, 0x07, 0x31, 0xC1,
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+ 0x48, 0x08, 0x0F, 0x0C, 0x31, 0x36, 0x0F);
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+
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+ write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
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+
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+ mdelay(120);
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+
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+ write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
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+
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+ return 0;
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+}
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+
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+static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
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+{
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+ write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
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+ xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
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+
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+ write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
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+ ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
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+
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+ write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
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+}
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+
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+#define ILI9340_MADCTL_MV 0x20
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+#define ILI9340_MADCTL_MX 0x40
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+#define ILI9340_MADCTL_MY 0x80
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+static int set_var(struct fbtft_par *par)
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+{
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+ u8 val;
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+
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+ switch (par->info->var.rotate) {
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+ case 270:
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+ val = ILI9340_MADCTL_MV;
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+ break;
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+ case 180:
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+ val = ILI9340_MADCTL_MY;
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+ break;
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+ case 90:
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+ val = ILI9340_MADCTL_MV | ILI9340_MADCTL_MY | ILI9340_MADCTL_MX;
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+ break;
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+ default:
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+ val = ILI9340_MADCTL_MX;
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+ break;
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+ }
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+ /* Memory Access Control */
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+ write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, val | (par->bgr << 3));
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+
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+ return 0;
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+}
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+
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+static void reset(struct fbtft_par *par)
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+{
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+ if (!par->gpio.reset)
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+ return;
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+ fbtft_par_dbg(DEBUG_RESET, par, "%s()\n", __func__);
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+ gpiod_set_value_cansleep(par->gpio.reset, 0);
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+ usleep_range(20, 40);
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+ gpiod_set_value_cansleep(par->gpio.reset, 1);
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+ msleep(120);
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+}
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+
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+static struct fbtft_display display = {
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+ .regwidth = 8,
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+ .buswidth = 8,
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+ .width = WIDTH,
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+ .height = HEIGHT,
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+ .fbtftops = {
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+ .init_display = init_display,
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+ .set_addr_win = set_addr_win,
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+ .set_var = set_var,
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+ .reset = reset,
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+ },
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+};
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+
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+FBTFT_REGISTER_DRIVER(DRVNAME, "odroid,hktft32", &display);
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+
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+MODULE_ALIAS("spi:" DRVNAME);
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+MODULE_ALIAS("platform:" DRVNAME);
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+MODULE_ALIAS("spi:hktft32");
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+MODULE_ALIAS("platform:hktft32");
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+
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+MODULE_DESCRIPTION("FB driver for the Hardkernel 3.2 inch TFT LCD uses the ILI9340 LCD Controller");
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+MODULE_AUTHOR("Yang Deokgyu");
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+MODULE_LICENSE("GPL");
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--
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2.25.1
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