staging: fbtft: add fb_s6d02a1 driver

This commit adds the fb_s6d02a1 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 d66281e..34676db 100644 (file)
--- a/drivers/staging/fbtft/Kconfig
+++ b/drivers/staging/fbtft/Kconfig
@@ -85,3 +85,9 @@ config FB_TFT_RA8875
         depends on FB_TFT
        help
          Generic Framebuffer support for RA8875
+
+config FB_TFT_S6D02A1
+       tristate "FB driver for the S6D02A1 LCD Controller"
+       depends on FB_TFT
+       help
+         Generic Framebuffer support for S6D02A1

diff --git a/drivers/staging/fbtft/Makefile b/drivers/staging/fbtft/Makefile
index d9aa2b3..e349e7f 100644 (file)
--- a/drivers/staging/fbtft/Makefile
+++ b/drivers/staging/fbtft/Makefile
@@ -16,3 +16,4 @@ obj-$(CONFIG_FB_TFT_ILI9481)     += fb_ili9481.o
 obj-$(CONFIG_FB_TFT_ILI9486)     += fb_ili9486.o
 obj-$(CONFIG_FB_TFT_PCD8544)     += fb_pcd8544.o
 obj-$(CONFIG_FB_TFT_RA8875)      += fb_ra8875.o
+obj-$(CONFIG_FB_TFT_S6D02A1)     += fb_s6d02a1.o

diff --git a/drivers/staging/fbtft/fb_s6d02a1.c b/drivers/staging/fbtft/fb_s6d02a1.c
new file mode 100644 (file)
index 0000000..e412a42
--- /dev/null
+++ b/drivers/staging/fbtft/fb_s6d02a1.c
@@ -0,0 +1,168 @@
+/*
+ * FB driver for the S6D02A1 LCD Controller
+ *
+ * Based on fb_st7735r.c by Noralf Tronnes
+ * Init code from UTFT library by Henning Karlsen
+ *
+ * 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_s6d02a1"
+
+static int default_init_sequence[] = {
+
+       -1, 0xf0, 0x5a, 0x5a,
+
+       -1, 0xfc, 0x5a, 0x5a,
+
+       -1, 0xfa, 0x02, 0x1f, 0x00, 0x10, 0x22, 0x30, 0x38, 0x3A, 0x3A, 0x3A, 0x3A, 0x3A, 0x3d, 0x02, 0x01,
+
+       -1, 0xfb, 0x21, 0x00, 0x02, 0x04, 0x07, 0x0a, 0x0b, 0x0c, 0x0c, 0x16, 0x1e, 0x30, 0x3f, 0x01, 0x02,
+
+       /* power setting sequence */
+       -1, 0xfd, 0x00, 0x00, 0x00, 0x17, 0x10, 0x00, 0x01, 0x01, 0x00, 0x1f, 0x1f,
+
+       -1, 0xf4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x3f, 0x07, 0x00, 0x3C, 0x36, 0x00, 0x3C, 0x36, 0x00,
+
+       -1, 0xf5, 0x00, 0x70, 0x66, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x6d, 0x66, 0x06,
+
+       -1, 0xf6, 0x02, 0x00, 0x3f, 0x00, 0x00, 0x00, 0x02, 0x00, 0x06, 0x01, 0x00,
+
+       -1, 0xf2, 0x00, 0x01, 0x03, 0x08, 0x08, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x04, 0x08, 0x08,
+
+       -1, 0xf8, 0x11,
+
+       -1, 0xf7, 0xc8, 0x20, 0x00, 0x00,
+
+       -1, 0xf3, 0x00, 0x00,
+
+       -1, 0x11,
+       -2, 50,
+
+       -1, 0xf3, 0x00, 0x01,
+       -2, 50,
+       -1, 0xf3, 0x00, 0x03,
+       -2, 50,
+       -1, 0xf3, 0x00, 0x07,
+       -2, 50,
+       -1, 0xf3, 0x00, 0x0f,
+       -2, 50,
+
+       -1, 0xf4, 0x00, 0x04, 0x00, 0x00, 0x00, 0x3f, 0x3f, 0x07, 0x00, 0x3C, 0x36, 0x00, 0x3C, 0x36, 0x00,
+       -2, 50,
+
+       -1, 0xf3, 0x00, 0x1f,
+       -2, 50,
+       -1, 0xf3, 0x00, 0x7f,
+       -2, 50,
+
+       -1, 0xf3, 0x00, 0xff,
+       -2, 50,
+
+       -1, 0xfd, 0x00, 0x00, 0x00, 0x17, 0x10, 0x00, 0x00, 0x01, 0x00, 0x16, 0x16,
+
+       -1, 0xf4, 0x00, 0x09, 0x00, 0x00, 0x00, 0x3f, 0x3f, 0x07, 0x00, 0x3C, 0x36, 0x00, 0x3C, 0x36, 0x00,
+
+       /* initializing sequence */
+
+       -1, 0x36, 0x08,
+
+       -1, 0x35, 0x00,
+
+       -1, 0x3a, 0x05,
+
+       /* gamma setting sequence */
+       -1, 0x26, 0x01, /* preset gamma curves, possible values 0x01, 0x02, 0x04, 0x08 */
+
+       -2, 150,
+       -1, 0x29,
+       -1, 0x2c,
+       /* 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;
+}
+
+static struct fbtft_display display = {
+       .regwidth = 8,
+       .width = 128,
+       .height = 160,
+       .init_sequence = default_init_sequence,
+       .fbtftops = {
+               .set_addr_win = set_addr_win,
+               .set_var = set_var,
+       },
+};
+FBTFT_REGISTER_DRIVER(DRVNAME, "samsung,s6d02a1", &display);
+
+MODULE_ALIAS("spi:" DRVNAME);
+MODULE_ALIAS("platform:" DRVNAME);
+MODULE_ALIAS("spi:s6d02a1");
+MODULE_ALIAS("platform:s6d02a1");
+
+MODULE_DESCRIPTION("FB driver for the S6D02A1 LCD Controller");
+MODULE_AUTHOR("WOLFGANG BUENING");
+MODULE_LICENSE("GPL");