diff options
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 000000000000..8c7bb3ac8030 --- /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"); |