[PATCH] staging: fbtft: Add support for Himax HX8357D controller
Heiner Kallweit
hkallweit1 at gmail.com
Thu May 21 20:10:35 UTC 2015
The Himax HX8357D is used e.g. by the Adafruit PITFT Plus 3.5".
They added HX8357D support to an own fork of fbtft and support Raspbian
only (https://github.com/adafruit/adafruit-rpi-fbtft/).
They don't intend to push it upstream but gave me the ok to do so.
I just applied small changes to the driver to align it with the other
fbtft drivers.
- add "compatible" argument to FBTFT_REGISTER_DRIVER call
- add missing MODULE_ALIAS declarations
Tested successfully with this display on an RPI2 under Arch Linux ARM
(kernel 3.18.13).
Signed-off-by: Heiner Kallweit <hkallweit1 at gmail.com>
---
drivers/staging/fbtft/Kconfig | 6 +
drivers/staging/fbtft/Makefile | 1 +
drivers/staging/fbtft/fb_hx8357d.c | 220 +++++++++++++++++++++++++++++++++++++
drivers/staging/fbtft/fb_hx8357d.h | 102 +++++++++++++++++
4 files changed, 329 insertions(+)
create mode 100644 drivers/staging/fbtft/fb_hx8357d.c
create mode 100644 drivers/staging/fbtft/fb_hx8357d.h
diff --git a/drivers/staging/fbtft/Kconfig b/drivers/staging/fbtft/Kconfig
index 346f189..d401878 100644
--- a/drivers/staging/fbtft/Kconfig
+++ b/drivers/staging/fbtft/Kconfig
@@ -38,6 +38,12 @@ config FB_TFT_HX8353D
help
Generic Framebuffer support for HX8353D
+config FB_TFT_HX8357D
+ tristate "FB driver for the HX8357D LCD Controller"
+ depends on FB_TFT
+ help
+ Generic Framebuffer support for HX8357D
+
config FB_TFT_ILI9163
tristate "FB driver for the ILI9163 LCD Controller"
depends on FB_TFT
diff --git a/drivers/staging/fbtft/Makefile b/drivers/staging/fbtft/Makefile
index 9e73bee..554b526 100644
--- a/drivers/staging/fbtft/Makefile
+++ b/drivers/staging/fbtft/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_FB_TFT_BD663474) += fb_bd663474.o
obj-$(CONFIG_FB_TFT_HX8340BN) += fb_hx8340bn.o
obj-$(CONFIG_FB_TFT_HX8347D) += fb_hx8347d.o
obj-$(CONFIG_FB_TFT_HX8353D) += fb_hx8353d.o
+obj-$(CONFIG_FB_TFT_HX8357D) += fb_hx8357d.o
obj-$(CONFIG_FB_TFT_ILI9163) += fb_ili9163.o
obj-$(CONFIG_FB_TFT_ILI9320) += fb_ili9320.o
obj-$(CONFIG_FB_TFT_ILI9325) += fb_ili9325.o
diff --git a/drivers/staging/fbtft/fb_hx8357d.c b/drivers/staging/fbtft/fb_hx8357d.c
new file mode 100644
index 0000000..27efd47
--- /dev/null
+++ b/drivers/staging/fbtft/fb_hx8357d.c
@@ -0,0 +1,220 @@
+/*
+ * FB driver for the HX8347D LCD Controller
+ *
+ * Copyright (C) 2013 Christian Vogelgsang
+ *
+ * Based on driver code found here: https://github.com/watterott/r61505u-Adapter
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+
+#include "fbtft.h"
+#include "fb_hx8357d.h"
+
+#define DRVNAME "fb_hx8357d"
+#define WIDTH 320
+#define HEIGHT 480
+
+
+static int init_display(struct fbtft_par *par)
+{
+ fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
+
+ par->fbtftops.reset(par);
+
+ /* Reset things like Gamma */
+ write_reg(par, HX8357B_SWRESET);
+
+ /* setextc */
+ write_reg(par, HX8357D_SETC, 0xFF, 0x83, 0x57);
+ mdelay(300);
+
+ /* setRGB which also enables SDO */
+ write_reg(par, HX8357_SETRGB, 0x00, 0x00, 0x06, 0x06);
+
+ /* -1.52V */
+ write_reg(par, HX8357D_SETCOM, 0x25);
+
+ /* Normal mode 70Hz, Idle mode 55 Hz */
+ write_reg(par, HX8357_SETOSC, 0x68);
+
+ /* Set Panel - BGR, Gate direction swapped */
+ write_reg(par, HX8357_SETPANEL, 0x05);
+
+ write_reg(par, HX8357_SETPWR1,
+ 0x00, // Not deep standby
+ 0x15, //BT
+ 0x1C, //VSPR
+ 0x1C, //VSNR
+ 0x83, //AP
+ 0xAA); //FS
+
+ write_reg(par, HX8357D_SETSTBA,
+ 0x50, //OPON normal
+ 0x50, //OPON idle
+ 0x01, //STBA
+ 0x3C, //STBA
+ 0x1E, //STBA
+ 0x08); //GEN
+
+ write_reg(par, HX8357D_SETCYC,
+ 0x02, //NW 0x02
+ 0x40, //RTN
+ 0x00, //DIV
+ 0x2A, //DUM
+ 0x2A, //DUM
+ 0x0D, //GDON
+ 0x78); //GDOFF
+
+ write_reg(par, HX8357D_SETGAMMA,
+ 0x02,
+ 0x0A,
+ 0x11,
+ 0x1d,
+ 0x23,
+ 0x35,
+ 0x41,
+ 0x4b,
+ 0x4b,
+ 0x42,
+ 0x3A,
+ 0x27,
+ 0x1B,
+ 0x08,
+ 0x09,
+ 0x03,
+ 0x02,
+ 0x0A,
+ 0x11,
+ 0x1d,
+ 0x23,
+ 0x35,
+ 0x41,
+ 0x4b,
+ 0x4b,
+ 0x42,
+ 0x3A,
+ 0x27,
+ 0x1B,
+ 0x08,
+ 0x09,
+ 0x03,
+ 0x00,
+ 0x01);
+
+ /* 16 bit */
+ write_reg(par, HX8357_COLMOD, 0x55);
+
+ write_reg(par, HX8357_MADCTL, 0xC0);
+
+ /* TE off */
+ write_reg(par, HX8357_TEON, 0x00);
+
+ /* tear line */
+ write_reg(par, HX8357_TEARLINE, 0x00, 0x02);
+
+ /* Exit Sleep */
+ write_reg(par, HX8357_SLPOUT);
+ mdelay(150);
+
+ /* display on */
+ write_reg(par, HX8357_DISPON);
+ mdelay(50);
+
+ return 0;
+}
+
+static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
+{
+ fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par,
+ "%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye);
+
+ /* Column addr set */
+ write_reg(par, HX8357_CASET,
+ xs >> 8, xs & 0xff, /* XSTART */
+ xe >> 8, xe & 0xff); /* XEND */
+
+ /* Row addr set */
+ write_reg(par, HX8357_PASET,
+ ys >> 8, ys & 0xff, /* YSTART */
+ ye >> 8, ye & 0xff); /* YEND */
+
+ /* write to RAM */
+ write_reg(par, HX8357_RAMWR);
+}
+
+#define HX8357D_MADCTL_MY 0x80
+#define HX8357D_MADCTL_MX 0x40
+#define HX8357D_MADCTL_MV 0x20
+#define HX8357D_MADCTL_ML 0x10
+#define HX8357D_MADCTL_RGB 0x00
+#define HX8357D_MADCTL_BGR 0x08
+#define HX8357D_MADCTL_MH 0x04
+static int set_var(struct fbtft_par *par)
+{
+ u8 val;
+
+ fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
+
+ switch (par->info->var.rotate) {
+ case 270:
+ val = HX8357D_MADCTL_MV | HX8357D_MADCTL_MX;
+ break;
+ case 180:
+ val = 0;
+ break;
+ case 90:
+ val = HX8357D_MADCTL_MV | HX8357D_MADCTL_MY;
+ break;
+ default:
+ val = HX8357D_MADCTL_MX | HX8357D_MADCTL_MY;
+ break;
+ }
+
+ val |= (par->bgr ? HX8357D_MADCTL_RGB : HX8357D_MADCTL_BGR);
+
+ /* Memory Access Control */
+ write_reg(par, HX8357_MADCTL, val);
+
+ return 0;
+}
+
+static struct fbtft_display display = {
+ .regwidth = 8,
+ .width = WIDTH,
+ .height = HEIGHT,
+ .gamma_num = 2,
+ .gamma_len = 14,
+ .fbtftops = {
+ .init_display = init_display,
+ .set_addr_win = set_addr_win,
+ .set_var = set_var,
+ },
+};
+FBTFT_REGISTER_DRIVER(DRVNAME, "himax,hx8357d", &display);
+
+MODULE_ALIAS("spi:" DRVNAME);
+MODULE_ALIAS("platform:" DRVNAME);
+MODULE_ALIAS("spi:hx8357d");
+MODULE_ALIAS("platform:hx8357d");
+
+MODULE_DESCRIPTION("FB driver for the HX8357D LCD Controller");
+MODULE_AUTHOR("Sean Cross <xobs at kosagi.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/staging/fbtft/fb_hx8357d.h b/drivers/staging/fbtft/fb_hx8357d.h
new file mode 100644
index 0000000..1c86845
--- /dev/null
+++ b/drivers/staging/fbtft/fb_hx8357d.h
@@ -0,0 +1,102 @@
+/***************************************************
+ This is our library for the Adafruit ILI9341 Breakout and Shield
+ ----> http://www.adafruit.com/products/1651
+
+ Check out the links above for our tutorials and wiring diagrams
+ These displays use SPI to communicate, 4 or 5 pins are required to
+ interface (RST is optional)
+ Adafruit invests time and resources providing this open source code,
+ please support Adafruit and open-source hardware by purchasing
+ products from Adafruit!
+
+ Written by Limor Fried/Ladyada for Adafruit Industries.
+ MIT license, all text above must be included in any redistribution
+ ****************************************************/
+
+#ifndef __HX8357_H__
+#define __HX8357_H__
+
+#define HX8357D 0xD
+#define HX8357B 0xB
+
+#define HX8357_TFTWIDTH 320
+#define HX8357_TFTHEIGHT 480
+
+#define HX8357B_NOP 0x00
+#define HX8357B_SWRESET 0x01
+#define HX8357B_RDDID 0x04
+#define HX8357B_RDDST 0x09
+
+#define HX8357B_RDPOWMODE 0x0A
+#define HX8357B_RDMADCTL 0x0B
+#define HX8357B_RDCOLMOD 0x0C
+#define HX8357B_RDDIM 0x0D
+#define HX8357B_RDDSDR 0x0F
+
+#define HX8357_SLPIN 0x10
+#define HX8357_SLPOUT 0x11
+#define HX8357B_PTLON 0x12
+#define HX8357B_NORON 0x13
+
+#define HX8357_INVOFF 0x20
+#define HX8357_INVON 0x21
+#define HX8357_DISPOFF 0x28
+#define HX8357_DISPON 0x29
+
+#define HX8357_CASET 0x2A
+#define HX8357_PASET 0x2B
+#define HX8357_RAMWR 0x2C
+#define HX8357_RAMRD 0x2E
+
+#define HX8357B_PTLAR 0x30
+#define HX8357_TEON 0x35
+#define HX8357_TEARLINE 0x44
+#define HX8357_MADCTL 0x36
+#define HX8357_COLMOD 0x3A
+
+#define HX8357_SETOSC 0xB0
+#define HX8357_SETPWR1 0xB1
+#define HX8357B_SETDISPLAY 0xB2
+#define HX8357_SETRGB 0xB3
+#define HX8357D_SETCOM 0xB6
+
+#define HX8357B_SETDISPMODE 0xB4
+#define HX8357D_SETCYC 0xB4
+#define HX8357B_SETOTP 0xB7
+#define HX8357D_SETC 0xB9
+
+#define HX8357B_SET_PANEL_DRIVING 0xC0
+#define HX8357D_SETSTBA 0xC0
+#define HX8357B_SETDGC 0xC1
+#define HX8357B_SETID 0xC3
+#define HX8357B_SETDDB 0xC4
+#define HX8357B_SETDISPLAYFRAME 0xC5
+#define HX8357B_GAMMASET 0xC8
+#define HX8357B_SETCABC 0xC9
+#define HX8357_SETPANEL 0xCC
+
+#define HX8357B_SETPOWER 0xD0
+#define HX8357B_SETVCOM 0xD1
+#define HX8357B_SETPWRNORMAL 0xD2
+
+#define HX8357B_RDID1 0xDA
+#define HX8357B_RDID2 0xDB
+#define HX8357B_RDID3 0xDC
+#define HX8357B_RDID4 0xDD
+
+#define HX8357D_SETGAMMA 0xE0
+
+#define HX8357B_SETGAMMA 0xC8
+#define HX8357B_SETPANELRELATED 0xE9
+
+// Color definitions
+#define HX8357_BLACK 0x0000
+#define HX8357_BLUE 0x001F
+#define HX8357_RED 0xF800
+#define HX8357_GREEN 0x07E0
+#define HX8357_CYAN 0x07FF
+#define HX8357_MAGENTA 0xF81F
+#define HX8357_YELLOW 0xFFE0
+#define HX8357_WHITE 0xFFFF
+
+#endif /* __HX8357_H__ */
--
2.4.1
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