The Himax HX8357D is used e.g. by the Adafruit PITFT Plus 3.5". Adafruit 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. Original author: Sean Cross <xobs@xxxxxxxxxx> 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@xxxxxxxxx> --- v2: added author tag to the patch description fixed checkpatch errors adjusted waits in init_display to match the chip spec and changed from mdelay to msleep --- drivers/staging/fbtft/Kconfig | 6 + drivers/staging/fbtft/Makefile | 1 + drivers/staging/fbtft/fb_hx8357d.c | 222 +++++++++++++++++++++++++++++++++++++ drivers/staging/fbtft/fb_hx8357d.h | 102 +++++++++++++++++ 4 files changed, 331 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 6cf0c58..3a0739d 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..8c7bb3a --- /dev/null +++ b/drivers/staging/fbtft/fb_hx8357d.c @@ -0,0 +1,222 @@ +/* + * FB driver for the HX8357D LCD Controller + * Copyright (C) 2015 Adafruit Industries + * + * Based on the HX8347D FB driver + * 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, see <http://www.gnu.org/licenses/>. + */ + +#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); + usleep_range(5000, 7000); + + /* setextc */ + write_reg(par, HX8357D_SETC, 0xFF, 0x83, 0x57); + msleep(150); + + /* 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); + msleep(150); + + /* display on */ + write_reg(par, HX8357_DISPON); + usleep_range(5000, 7000); + + 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@xxxxxxxxxx>"); +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..de05e8c --- /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__ */ -- 2.4.2 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
