staging: fbtft: add fb_tinylcd driver

This commit adds the fb_tinylcd 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 6bc2121..dd740bf 100644 (file)
--- a/drivers/staging/fbtft/Kconfig
+++ b/drivers/staging/fbtft/Kconfig
@@ -127,3 +127,9 @@ config FB_TFT_ST7735R
        depends on FB_TFT
        help
          Generic Framebuffer support for ST7735R
+
+config FB_TFT_TINYLCD
+       tristate "FB driver for tinylcd.com display"
+       depends on FB_TFT
+       help
+         Custom Framebuffer support for tinylcd.com display

diff --git a/drivers/staging/fbtft/Makefile b/drivers/staging/fbtft/Makefile
index 2771e60..a5c2d15 100644 (file)
--- a/drivers/staging/fbtft/Makefile
+++ b/drivers/staging/fbtft/Makefile
@@ -23,3 +23,4 @@ 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
+obj-$(CONFIG_FB_TFT_TINYLCD)     += fb_tinylcd.o

diff --git a/drivers/staging/fbtft/fb_tinylcd.c b/drivers/staging/fbtft/fb_tinylcd.c
new file mode 100644 (file)
index 0000000..ca98bfb
--- /dev/null
+++ b/drivers/staging/fbtft/fb_tinylcd.c
@@ -0,0 +1,124 @@
+/*
+ * Custom FB driver for tinylcd.com display
+ *
+ * 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 <linux/delay.h>
+
+#include "fbtft.h"
+
+#define DRVNAME                "fb_tinylcd"
+#define WIDTH          320
+#define HEIGHT         480
+
+
+static int init_display(struct fbtft_par *par)
+{
+       fbtft_par_dbg(DEBUG_INIT_DISPLAY, par, "%s()\n", __func__);
+
+       par->fbtftops.reset(par);
+
+       write_reg(par, 0xB0, 0x80);
+       write_reg(par, 0xC0, 0x0A, 0x0A);
+       write_reg(par, 0xC1, 0x45, 0x07);
+       write_reg(par, 0xC2, 0x33);
+       write_reg(par, 0xC5, 0x00, 0x42, 0x80);
+       write_reg(par, 0xB1, 0xD0, 0x11);
+       write_reg(par, 0xB4, 0x02);
+       write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
+       write_reg(par, 0xB7, 0x07);
+       write_reg(par, 0x36, 0x58);
+       write_reg(par, 0xF0, 0x36, 0xA5, 0xD3);
+       write_reg(par, 0xE5, 0x80);
+       write_reg(par, 0xE5, 0x01);
+       write_reg(par, 0xB3, 0x00);
+       write_reg(par, 0xE5, 0x00);
+       write_reg(par, 0xF0, 0x36, 0xA5, 0x53);
+       write_reg(par, 0xE0, 0x00, 0x35, 0x33, 0x00, 0x00, 0x00,
+                            0x00, 0x35, 0x33, 0x00, 0x00, 0x00);
+       write_reg(par, 0x3A, 0x55);
+       write_reg(par, 0x11);
+       udelay(250);
+       write_reg(par, 0x29);
+
+       return 0;
+}
+
+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 270:
+               write_reg(par, 0xB6, 0x00, 0x02, 0x3B);
+               write_reg(par, 0x36, 0x28);
+               break;
+       case 180:
+               write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
+               write_reg(par, 0x36, 0x58);
+               break;
+       case 90:
+               write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
+               write_reg(par, 0x36, 0x38);
+               break;
+       default:
+               write_reg(par, 0xB6, 0x00, 0x22, 0x3B);
+               write_reg(par, 0x36, 0x08);
+               break;
+       }
+
+       return 0;
+}
+
+
+static struct fbtft_display display = {
+       .regwidth = 8,
+       .width = WIDTH,
+       .height = HEIGHT,
+       .fbtftops = {
+               .init_display = init_display,
+               .set_addr_win = set_addr_win,
+               .set_var = set_var,
+       },
+};
+FBTFT_REGISTER_DRIVER(DRVNAME, "neosec,tinylcd", &display);
+
+MODULE_ALIAS("spi:" DRVNAME);
+MODULE_ALIAS("spi:tinylcd");
+
+MODULE_DESCRIPTION("Custom FB driver for tinylcd.com display");
+MODULE_AUTHOR("Noralf Tronnes");
+MODULE_LICENSE("GPL");