staging: fbtft: add fb_hx8347d driver
This commit adds the fb_hx8347d driver from the fbtft project at https://github.com/notro/fbtft. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Noralf Tronnes <notro@tronnes.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Petazzoni
Greg Kroah-Hartman
Родитель
39e3d67f8e
Коммит
66c06c8379
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@ -25,3 +25,9 @@ config FB_TFT_HX8340BN
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depends on FB_TFT
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help
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Generic Framebuffer support for HX8340BN
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config FB_TFT_HX8347D
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tristate "FB driver for the HX8347D LCD Controller"
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depends on FB_TFT
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help
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Generic Framebuffer support for HX8347D
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@ -6,3 +6,4 @@ fbtft-y += fbtft-core.o fbtft-sysfs.o fbtft-bus.o fbtft
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obj-$(CONFIG_FB_TFT_AGM1264K_FL) += fb_agm1264k-fl.o
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obj-$(CONFIG_FB_TFT_BD663474) += fb_bd663474.o
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obj-$(CONFIG_FB_TFT_HX8340BN) += fb_hx8340bn.o
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obj-$(CONFIG_FB_TFT_HX8347D) += fb_hx8347d.o
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@ -0,0 +1,181 @@
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/*
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* FB driver for the HX8347D LCD Controller
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*
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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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 "fbtft.h"
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#define DRVNAME "fb_hx8347d"
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#define WIDTH 320
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#define HEIGHT 240
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#define DEFAULT_GAMMA "0 0 0 0 0 0 0 0 0 0 0 0 0 0\n" \
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"0 0 0 0 0 0 0 0 0 0 0 0 0 0"
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static int init_display(struct fbtft_par *par)
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{
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fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
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par->fbtftops.reset(par);
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/* driving ability */
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write_reg(par, 0xEA, 0x00);
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write_reg(par, 0xEB, 0x20);
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write_reg(par, 0xEC, 0x0C);
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write_reg(par, 0xED, 0xC4);
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write_reg(par, 0xE8, 0x40);
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write_reg(par, 0xE9, 0x38);
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write_reg(par, 0xF1, 0x01);
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write_reg(par, 0xF2, 0x10);
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write_reg(par, 0x27, 0xA3);
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/* power voltage */
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write_reg(par, 0x1B, 0x1B);
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write_reg(par, 0x1A, 0x01);
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write_reg(par, 0x24, 0x2F);
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write_reg(par, 0x25, 0x57);
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/* VCOM offset */
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write_reg(par, 0x23, 0x8D); /* for flicker adjust */
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/* power on */
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write_reg(par, 0x18, 0x36);
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write_reg(par, 0x19, 0x01); /* start osc */
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write_reg(par, 0x01, 0x00); /* wakeup */
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write_reg(par, 0x1F, 0x88);
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mdelay(5);
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write_reg(par, 0x1F, 0x80);
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mdelay(5);
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write_reg(par, 0x1F, 0x90);
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mdelay(5);
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write_reg(par, 0x1F, 0xD0);
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mdelay(5);
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/* color selection */
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write_reg(par, 0x17, 0x05); /* 65k */
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/*panel characteristic */
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write_reg(par, 0x36, 0x00);
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/*display on */
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write_reg(par, 0x28, 0x38);
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mdelay(40);
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write_reg(par, 0x28, 0x3C);
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/* orientation */
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write_reg(par, 0x16, 0x60 | (par->bgr << 3));
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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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fbtft_par_dbg(DEBUG_SET_ADDR_WIN, par,
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"%s(xs=%d, ys=%d, xe=%d, ye=%d)\n", __func__, xs, ys, xe, ye);
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write_reg(par, 0x02, (xs >> 8) & 0xFF);
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write_reg(par, 0x03, xs & 0xFF);
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write_reg(par, 0x04, (xe >> 8) & 0xFF);
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write_reg(par, 0x05, xe & 0xFF);
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write_reg(par, 0x06, (ys >> 8) & 0xFF);
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write_reg(par, 0x07, ys & 0xFF);
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write_reg(par, 0x08, (ye >> 8) & 0xFF);
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write_reg(par, 0x09, ye & 0xFF);
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write_reg(par, 0x22);
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}
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/*
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Gamma string format:
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VRP0 VRP1 VRP2 VRP3 VRP4 VRP5 PRP0 PRP1 PKP0 PKP1 PKP2 PKP3 PKP4 CGM
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VRN0 VRN1 VRN2 VRN3 VRN4 VRN5 PRN0 PRN1 PKN0 PKN1 PKN2 PKN3 PKN4 CGM
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*/
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#define CURVE(num, idx) curves[num*par->gamma.num_values + idx]
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static int set_gamma(struct fbtft_par *par, unsigned long *curves)
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{
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unsigned long mask[] = {
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0b111111, 0b111111, 0b111111, 0b111111, 0b111111, 0b111111,
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0b1111111, 0b1111111,
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0b11111, 0b11111, 0b11111, 0b11111, 0b11111,
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0b1111};
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int i, j;
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int acc = 0;
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fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
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/* apply mask */
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for (i = 0; i < par->gamma.num_curves; i++)
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for (j = 0; j < par->gamma.num_values; j++) {
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acc += CURVE(i, j);
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CURVE(i, j) &= mask[j];
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}
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if (acc == 0) /* skip if all values are zero */
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return 0;
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for (i = 0; i < par->gamma.num_curves; i++) {
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write_reg(par, 0x40 + (i * 0x10), CURVE(i, 0));
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write_reg(par, 0x41 + (i * 0x10), CURVE(i, 1));
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write_reg(par, 0x42 + (i * 0x10), CURVE(i, 2));
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write_reg(par, 0x43 + (i * 0x10), CURVE(i, 3));
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write_reg(par, 0x44 + (i * 0x10), CURVE(i, 4));
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write_reg(par, 0x45 + (i * 0x10), CURVE(i, 5));
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write_reg(par, 0x46 + (i * 0x10), CURVE(i, 6));
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write_reg(par, 0x47 + (i * 0x10), CURVE(i, 7));
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write_reg(par, 0x48 + (i * 0x10), CURVE(i, 8));
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write_reg(par, 0x49 + (i * 0x10), CURVE(i, 9));
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write_reg(par, 0x4A + (i * 0x10), CURVE(i, 10));
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write_reg(par, 0x4B + (i * 0x10), CURVE(i, 11));
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write_reg(par, 0x4C + (i * 0x10), CURVE(i, 12));
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}
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write_reg(par, 0x5D, (CURVE(1, 0) << 4) | CURVE(0, 0));
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return 0;
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}
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#undef CURVE
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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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.gamma = DEFAULT_GAMMA,
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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_gamma = set_gamma,
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},
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};
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FBTFT_REGISTER_DRIVER(DRVNAME, "himax,hx8347d", &display);
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MODULE_ALIAS("spi:" DRVNAME);
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MODULE_ALIAS("platform:" DRVNAME);
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MODULE_ALIAS("spi:hx8347d");
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MODULE_ALIAS("platform:hx8347d");
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MODULE_DESCRIPTION("FB driver for the HX8347D LCD Controller");
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MODULE_AUTHOR("Christian Vogelgsang");
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MODULE_LICENSE("GPL");
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