diff options
Diffstat (limited to 'drivers/staging/fbtft/fb_ili9486.c')
-rw-r--r-- | drivers/staging/fbtft/fb_ili9486.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/staging/fbtft/fb_ili9486.c b/drivers/staging/fbtft/fb_ili9486.c new file mode 100644 index 0000000000..66210a7137 --- /dev/null +++ b/drivers/staging/fbtft/fb_ili9486.c @@ -0,0 +1,103 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * FB driver for the ILI9486 LCD Controller + * + * Copyright (C) 2014 Noralf Tronnes + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <video/mipi_display.h> + +#include "fbtft.h" + +#define DRVNAME "fb_ili9486" +#define WIDTH 320 +#define HEIGHT 480 + +/* this init sequence matches PiScreen */ +static const s16 default_init_sequence[] = { + /* Interface Mode Control */ + -1, 0xb0, 0x0, + -1, MIPI_DCS_EXIT_SLEEP_MODE, + -2, 250, + /* Interface Pixel Format */ + -1, MIPI_DCS_SET_PIXEL_FORMAT, 0x55, + /* Power Control 3 */ + -1, 0xC2, 0x44, + /* VCOM Control 1 */ + -1, 0xC5, 0x00, 0x00, 0x00, 0x00, + /* PGAMCTRL(Positive Gamma Control) */ + -1, 0xE0, 0x0F, 0x1F, 0x1C, 0x0C, 0x0F, 0x08, 0x48, 0x98, + 0x37, 0x0A, 0x13, 0x04, 0x11, 0x0D, 0x00, + /* NGAMCTRL(Negative Gamma Control) */ + -1, 0xE1, 0x0F, 0x32, 0x2E, 0x0B, 0x0D, 0x05, 0x47, 0x75, + 0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00, + /* Digital Gamma Control 1 */ + -1, 0xE2, 0x0F, 0x32, 0x2E, 0x0B, 0x0D, 0x05, 0x47, 0x75, + 0x37, 0x06, 0x10, 0x03, 0x24, 0x20, 0x00, + -1, MIPI_DCS_EXIT_SLEEP_MODE, + -1, MIPI_DCS_SET_DISPLAY_ON, + /* end marker */ + -3 +}; + +static void set_addr_win(struct fbtft_par *par, int xs, int ys, int xe, int ye) +{ + write_reg(par, MIPI_DCS_SET_COLUMN_ADDRESS, + xs >> 8, xs & 0xFF, xe >> 8, xe & 0xFF); + + write_reg(par, MIPI_DCS_SET_PAGE_ADDRESS, + ys >> 8, ys & 0xFF, ye >> 8, ye & 0xFF); + + write_reg(par, MIPI_DCS_WRITE_MEMORY_START); +} + +static int set_var(struct fbtft_par *par) +{ + switch (par->info->var.rotate) { + case 0: + write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, + 0x80 | (par->bgr << 3)); + break; + case 90: + write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, + 0x20 | (par->bgr << 3)); + break; + case 180: + write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, + 0x40 | (par->bgr << 3)); + break; + case 270: + write_reg(par, MIPI_DCS_SET_ADDRESS_MODE, + 0xE0 | (par->bgr << 3)); + break; + default: + break; + } + + return 0; +} + +static struct fbtft_display display = { + .regwidth = 8, + .width = WIDTH, + .height = HEIGHT, + .init_sequence = default_init_sequence, + .fbtftops = { + .set_addr_win = set_addr_win, + .set_var = set_var, + }, +}; + +FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9486", &display); + +MODULE_ALIAS("spi:" DRVNAME); +MODULE_ALIAS("platform:" DRVNAME); +MODULE_ALIAS("spi:ili9486"); +MODULE_ALIAS("platform:ili9486"); + +MODULE_DESCRIPTION("FB driver for the ILI9486 LCD Controller"); +MODULE_AUTHOR("Noralf Tronnes"); +MODULE_LICENSE("GPL"); |