staging: fbtft: add fb_ili9486 driver

This commit adds the fb_ili9486 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>

diff --git a/drivers/staging/fbtft/Kconfig b/drivers/staging/fbtft/Kconfig
index 86a1bee..ca73537 100644 (file)
--- a/drivers/staging/fbtft/Kconfig
+++ b/drivers/staging/fbtft/Kconfig
@@ -67,3 +67,9 @@ config FB_TFT_ILI9481
        depends on FB_TFT
        help
          Generic Framebuffer support for ILI9481
+
+config FB_TFT_ILI9486
+       tristate "FB driver for the ILI9486 LCD Controller"
+       depends on FB_TFT
+       help
+         Generic Framebuffer support for ILI9486

diff --git a/drivers/staging/fbtft/Makefile b/drivers/staging/fbtft/Makefile
index 0740641..8e633cf 100644 (file)
--- a/drivers/staging/fbtft/Makefile
+++ b/drivers/staging/fbtft/Makefile
@@ -13,3 +13,4 @@ obj-$(CONFIG_FB_TFT_ILI9325)     += fb_ili9325.o
 obj-$(CONFIG_FB_TFT_ILI9340)     += fb_ili9340.o
 obj-$(CONFIG_FB_TFT_ILI9341)     += fb_ili9341.o
 obj-$(CONFIG_FB_TFT_ILI9481)     += fb_ili9481.o
+obj-$(CONFIG_FB_TFT_ILI9486)     += fb_ili9486.o

diff --git a/drivers/staging/fbtft/fb_ili9486.c b/drivers/staging/fbtft/fb_ili9486.c
new file mode 100644 (file)
index 0000000..95b8999
--- /dev/null
+++ b/drivers/staging/fbtft/fb_ili9486.c
@@ -0,0 +1,121 @@
+/*
+ * FB driver for the ILI9486 LCD Controller
+ *
+ * Copyright (C) 2014 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_ili9486"
+#define WIDTH          320
+#define HEIGHT         480
+
+
+/* this init sequence matches PiScreen */
+static int default_init_sequence[] = {
+       /* Interface Mode Control */
+       -1, 0xb0, 0x0,
+       /* Sleep OUT */
+       -1, 0x11,
+       -2, 250,
+       /* Interface Pixel Format */
+       -1, 0x3A, 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,
+       /* Sleep OUT */
+       -1, 0x11,
+       /* Display ON */
+       -1, 0x29,
+       /* 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);
+}
+
+static int set_var(struct fbtft_par *par)
+{
+       fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
+
+       switch (par->info->var.rotate) {
+       case 0:
+               write_reg(par, 0x36, 0x80 | (par->bgr << 3));
+               break;
+       case 90:
+               write_reg(par, 0x36, 0x20 | (par->bgr << 3));
+               break;
+       case 180:
+               write_reg(par, 0x36, 0x40 | (par->bgr << 3));
+               break;
+       case 270:
+               write_reg(par, 0x36, 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");