diff options
author | Heiner Kallweit <hkallweit1@gmail.com> | 2015-05-31 14:44:54 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-06-01 06:26:30 +0900 |
commit | 9cd491e8c390d403bdf881808ef409d83266f4b2 (patch) | |
tree | fc6969f71d9fa14e3ea1fb700b8ed50eebf89ae1 /drivers/staging/fbtft/fb_hx8357d.c | |
parent | 5df5910b13e423c54930c4e9f662fd94da856d4f (diff) | |
download | op-kernel-dev-9cd491e8c390d403bdf881808ef409d83266f4b2.zip op-kernel-dev-9cd491e8c390d403bdf881808ef409d83266f4b2.tar.gz |
staging: fbtft: Add support for Himax HX8357D controller
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@kosagi.com>
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@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/fbtft/fb_hx8357d.c')
-rw-r--r-- | drivers/staging/fbtft/fb_hx8357d.c | 222 |
1 files changed, 222 insertions, 0 deletions
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@kosagi.com>"); +MODULE_LICENSE("GPL"); |