staging: fbtft: add fb_st7735r driver
This commit adds the fb_st7735r 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
parent
883daf0a5c
commit
735d98cdb8
|
|
@ -121,3 +121,9 @@ config FB_TFT_SSD1351
|
|||
depends on FB_TFT
|
||||
help
|
||||
Framebuffer support for SSD1351
|
||||
|
||||
config FB_TFT_ST7735R
|
||||
tristate "FB driver for the ST7735R LCD Controller"
|
||||
depends on FB_TFT
|
||||
help
|
||||
Generic Framebuffer support for ST7735R
|
||||
|
|
|
|||
|
|
@ -22,3 +22,4 @@ obj-$(CONFIG_FB_TFT_SSD1289) += fb_ssd1289.o
|
|||
obj-$(CONFIG_FB_TFT_SSD1306) += fb_ssd1306.o
|
||||
obj-$(CONFIG_FB_TFT_SSD1331) += fb_ssd1331.o
|
||||
obj-$(CONFIG_FB_TFT_SSD1351) += fb_ssd1351.o
|
||||
obj-$(CONFIG_FB_TFT_ST7735R) += fb_st7735r.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,195 @@
|
|||
/*
|
||||
* FB driver for the ST7735R LCD Controller
|
||||
*
|
||||
* Copyright (C) 2013 Noralf Tronnes
|
||||
*
|
||||
* 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, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/init.h>
|
||||
|
||||
#include "fbtft.h"
|
||||
|
||||
#define DRVNAME "fb_st7735r"
|
||||
#define DEFAULT_GAMMA "0F 1A 0F 18 2F 28 20 22 1F 1B 23 37 00 07 02 10\n" \
|
||||
"0F 1B 0F 17 33 2C 29 2E 30 30 39 3F 00 07 03 10"
|
||||
|
||||
|
||||
static int default_init_sequence[] = {
|
||||
/* SWRESET - Software reset */
|
||||
-1, 0x01,
|
||||
-2, 150, /* delay */
|
||||
|
||||
/* SLPOUT - Sleep out & booster on */
|
||||
-1, 0x11,
|
||||
-2, 500, /* delay */
|
||||
|
||||
/* FRMCTR1 - frame rate control: normal mode
|
||||
frame rate = fosc / (1 x 2 + 40) * (LINE + 2C + 2D) */
|
||||
-1, 0xB1, 0x01, 0x2C, 0x2D,
|
||||
|
||||
/* FRMCTR2 - frame rate control: idle mode
|
||||
frame rate = fosc / (1 x 2 + 40) * (LINE + 2C + 2D) */
|
||||
-1, 0xB2, 0x01, 0x2C, 0x2D,
|
||||
|
||||
/* FRMCTR3 - frame rate control - partial mode
|
||||
dot inversion mode, line inversion mode */
|
||||
-1, 0xB3, 0x01, 0x2C, 0x2D, 0x01, 0x2C, 0x2D,
|
||||
|
||||
/* INVCTR - display inversion control
|
||||
no inversion */
|
||||
-1, 0xB4, 0x07,
|
||||
|
||||
/* PWCTR1 - Power Control
|
||||
-4.6V, AUTO mode */
|
||||
-1, 0xC0, 0xA2, 0x02, 0x84,
|
||||
|
||||
/* PWCTR2 - Power Control
|
||||
VGH25 = 2.4C VGSEL = -10 VGH = 3 * AVDD */
|
||||
-1, 0xC1, 0xC5,
|
||||
|
||||
/* PWCTR3 - Power Control
|
||||
Opamp current small, Boost frequency */
|
||||
-1, 0xC2, 0x0A, 0x00,
|
||||
|
||||
/* PWCTR4 - Power Control
|
||||
BCLK/2, Opamp current small & Medium low */
|
||||
-1, 0xC3,0x8A,0x2A,
|
||||
|
||||
/* PWCTR5 - Power Control */
|
||||
-1, 0xC4, 0x8A, 0xEE,
|
||||
|
||||
/* VMCTR1 - Power Control */
|
||||
-1, 0xC5, 0x0E,
|
||||
|
||||
/* INVOFF - Display inversion off */
|
||||
-1, 0x20,
|
||||
|
||||
/* COLMOD - Interface pixel format */
|
||||
-1, 0x3A, 0x05,
|
||||
|
||||
/* DISPON - Display On */
|
||||
-1, 0x29,
|
||||
-2, 100, /* delay */
|
||||
|
||||
/* NORON - Partial off (Normal) */
|
||||
-1, 0x13,
|
||||
-2, 10, /* delay */
|
||||
|
||||
/* end marker */
|
||||
-3
|
||||
};
|
||||
|
||||
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 address */
|
||||
write_reg(par, 0x2A, xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF);
|
||||
|
||||
/* Row adress */
|
||||
write_reg(par, 0x2B, ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF);
|
||||
|
||||
/* Memory write */
|
||||
write_reg(par, 0x2C);
|
||||
}
|
||||
|
||||
#define MY (1 << 7)
|
||||
#define MX (1 << 6)
|
||||
#define MV (1 << 5)
|
||||
static int set_var(struct fbtft_par *par)
|
||||
{
|
||||
fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
|
||||
|
||||
/* MADCTL - Memory data access control
|
||||
RGB/BGR:
|
||||
1. Mode selection pin SRGB
|
||||
RGB H/W pin for color filter setting: 0=RGB, 1=BGR
|
||||
2. MADCTL RGB bit
|
||||
RGB-BGR ORDER color filter panel: 0=RGB, 1=BGR */
|
||||
switch (par->info->var.rotate) {
|
||||
case 0:
|
||||
write_reg(par, 0x36, MX | MY | (par->bgr << 3));
|
||||
break;
|
||||
case 270:
|
||||
write_reg(par, 0x36, MY | MV | (par->bgr << 3));
|
||||
break;
|
||||
case 180:
|
||||
write_reg(par, 0x36, (par->bgr << 3));
|
||||
break;
|
||||
case 90:
|
||||
write_reg(par, 0x36, MX | MV | (par->bgr << 3));
|
||||
break;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
Gamma string format:
|
||||
VRF0P VOS0P PK0P PK1P PK2P PK3P PK4P PK5P PK6P PK7P PK8P PK9P SELV0P SELV1P SELV62P SELV63P
|
||||
VRF0N VOS0N PK0N PK1N PK2N PK3N PK4N PK5N PK6N PK7N PK8N PK9N SELV0N SELV1N SELV62N SELV63N
|
||||
*/
|
||||
#define CURVE(num, idx) curves[num*par->gamma.num_values + idx]
|
||||
static int set_gamma(struct fbtft_par *par, unsigned long *curves)
|
||||
{
|
||||
int i,j;
|
||||
|
||||
fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
|
||||
|
||||
/* apply mask */
|
||||
for (i = 0; i < par->gamma.num_curves; i++)
|
||||
for (j = 0; j < par->gamma.num_values; j++)
|
||||
CURVE(i,j) &= 0b111111;
|
||||
|
||||
for (i = 0; i < par->gamma.num_curves; i++)
|
||||
write_reg(par, 0xE0 + i,
|
||||
CURVE(i, 0), CURVE(i, 1), CURVE(i, 2), CURVE(i, 3),
|
||||
CURVE(i, 4), CURVE(i, 5), CURVE(i, 6), CURVE(i, 7),
|
||||
CURVE(i, 8), CURVE(i, 9), CURVE(i, 10), CURVE(i, 11),
|
||||
CURVE(i, 12), CURVE(i, 13), CURVE(i, 14), CURVE(i,15));
|
||||
|
||||
return 0;
|
||||
}
|
||||
#undef CURVE
|
||||
|
||||
|
||||
static struct fbtft_display display = {
|
||||
.regwidth = 8,
|
||||
.width = 128,
|
||||
.height = 160,
|
||||
.init_sequence = default_init_sequence,
|
||||
.gamma_num = 2,
|
||||
.gamma_len = 16,
|
||||
.gamma = DEFAULT_GAMMA,
|
||||
.fbtftops = {
|
||||
.set_addr_win = set_addr_win,
|
||||
.set_var = set_var,
|
||||
.set_gamma = set_gamma,
|
||||
},
|
||||
};
|
||||
FBTFT_REGISTER_DRIVER(DRVNAME, "sitronix,st7735r", &display);
|
||||
|
||||
MODULE_ALIAS("spi:" DRVNAME);
|
||||
MODULE_ALIAS("platform:" DRVNAME);
|
||||
MODULE_ALIAS("spi:st7735r");
|
||||
MODULE_ALIAS("platform:st7735r");
|
||||
|
||||
MODULE_DESCRIPTION("FB driver for the ST7735R LCD Controller");
|
||||
MODULE_AUTHOR("Noralf Tronnes");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue