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78c00ccc52
Now that the SPDX tag is in all fbtft files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
201 lines
4 KiB
C
201 lines
4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* FB driver for the HX8357D LCD Controller
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* Copyright (C) 2015 Adafruit Industries
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*
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* Based on the HX8347D FB driver
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* Copyright (C) 2013 Christian Vogelgsang
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*
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* Based on driver code found here: https://github.com/watterott/r61505u-Adapter
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <video/mipi_display.h>
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#include "fbtft.h"
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#include "fb_hx8357d.h"
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#define DRVNAME "fb_hx8357d"
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#define WIDTH 320
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#define HEIGHT 480
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static int init_display(struct fbtft_par *par)
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{
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par->fbtftops.reset(par);
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/* Reset things like Gamma */
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write_reg(par, MIPI_DCS_SOFT_RESET);
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usleep_range(5000, 7000);
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/* setextc */
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write_reg(par, HX8357D_SETC, 0xFF, 0x83, 0x57);
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msleep(150);
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/* setRGB which also enables SDO */
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write_reg(par, HX8357_SETRGB, 0x00, 0x00, 0x06, 0x06);
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/* -1.52V */
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write_reg(par, HX8357D_SETCOM, 0x25);
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/* Normal mode 70Hz, Idle mode 55 Hz */
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write_reg(par, HX8357_SETOSC, 0x68);
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/* Set Panel - BGR, Gate direction swapped */
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write_reg(par, HX8357_SETPANEL, 0x05);
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write_reg(par, HX8357_SETPWR1,
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0x00, /* Not deep standby */
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0x15, /* BT */
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0x1C, /* VSPR */
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0x1C, /* VSNR */
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0x83, /* AP */
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0xAA); /* FS */
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write_reg(par, HX8357D_SETSTBA,
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0x50, /* OPON normal */
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0x50, /* OPON idle */
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0x01, /* STBA */
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0x3C, /* STBA */
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0x1E, /* STBA */
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0x08); /* GEN */
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write_reg(par, HX8357D_SETCYC,
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0x02, /* NW 0x02 */
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0x40, /* RTN */
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0x00, /* DIV */
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0x2A, /* DUM */
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0x2A, /* DUM */
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0x0D, /* GDON */
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0x78); /* GDOFF */
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write_reg(par, HX8357D_SETGAMMA,
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0x02,
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0x0A,
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0x11,
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0x1d,
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0x23,
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0x35,
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0x41,
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0x4b,
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0x4b,
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0x42,
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0x3A,
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0x27,
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0x1B,
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0x08,
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0x09,
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0x03,
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0x02,
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0x0A,
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0x11,
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0x1d,
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0x23,
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0x35,
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0x41,
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0x4b,
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0x4b,
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0x42,
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0x3A,
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0x27,
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0x1B,
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0x08,
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0x09,
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0x03,
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0x00,
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0x01);
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/* 16 bit */
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write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, 0x55);
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write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, 0xC0);
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/* TE off */
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write_reg(par, MIPI_DCS_SET_TEAR_ON, 0x00);
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/* tear line */
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write_reg(par, MIPI_DCS_SET_TEAR_SCANLINE, 0x00, 0x02);
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/* Exit Sleep */
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write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
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msleep(150);
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/* display on */
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write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
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usleep_range(5000, 7000);
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return 0;
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}
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static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye)
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{
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write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS,
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xs >> 8, xs & 0xff, /* XSTART */
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xe >> 8, xe & 0xff); /* XEND */
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write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS,
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ys >> 8, ys & 0xff, /* YSTART */
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ye >> 8, ye & 0xff); /* YEND */
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write_reg(par, MIPI_DCS_WRITE_MEMORY_START);
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}
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#define HX8357D_MADCTL_MY 0x80
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#define HX8357D_MADCTL_MX 0x40
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#define HX8357D_MADCTL_MV 0x20
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#define HX8357D_MADCTL_ML 0x10
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#define HX8357D_MADCTL_RGB 0x00
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#define HX8357D_MADCTL_BGR 0x08
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#define HX8357D_MADCTL_MH 0x04
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static int set_var(struct fbtft_par *par)
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{
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u8 val;
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switch (par->info->var.rotate) {
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case 270:
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val = HX8357D_MADCTL_MV | HX8357D_MADCTL_MX;
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break;
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case 180:
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val = 0;
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break;
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case 90:
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val = HX8357D_MADCTL_MV | HX8357D_MADCTL_MY;
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break;
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default:
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val = HX8357D_MADCTL_MX | HX8357D_MADCTL_MY;
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break;
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}
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val |= (par->bgr ? HX8357D_MADCTL_RGB : HX8357D_MADCTL_BGR);
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/* Memory Access Control */
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write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, val);
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return 0;
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}
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static struct fbtft_display display = {
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.regwidth = 8,
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.width = WIDTH,
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.height = HEIGHT,
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.gamma_num = 2,
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.gamma_len = 14,
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.fbtftops = {
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.init_display = init_display,
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.set_addr_win = set_addr_win,
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.set_var = set_var,
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},
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};
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FBTFT_REGISTER_DRIVER(DRVNAME, "himax,hx8357d", &display);
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MODULE_ALIAS("spi:" DRVNAME);
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MODULE_ALIAS("platform:" DRVNAME);
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MODULE_ALIAS("spi:hx8357d");
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MODULE_ALIAS("platform:hx8357d");
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MODULE_DESCRIPTION("FB driver for the HX8357D LCD Controller");
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MODULE_AUTHOR("Sean Cross <xobs@kosagi.com>");
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MODULE_LICENSE("GPL");
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