--- /dev/null
+/*
+ * 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.
+ */
+
+#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)
+{
+ 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)
+{
+ /* 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;
+
+ 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");
Code Review / kvmfornfv.git / blobdiff