MLK-12425-2: video: epdc: introduce epdc support

Support EPDC.
E-Ink feature is supported by i.MX6DL/SL and i.MX7D.
For now this driver only supports i.MX6DL/SL, because the
i.MX7D EPDC driver needs pxp support which is not included
in U-Boot.

Support user defined logo file, if there is no logo file, it will
draw a black border around a white screen.

If need to enable EPDC, a waveform file is required to let all
work.

Since we need LCD_MONOCHROME mode for EPDC, we introduce LCD_MONOCHROME
support.

Please refer to Linux Reference Manual for how to flash WAVEFORM file.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Robby Cai <R63905@freescale.com>
Signed-off-by: Nitin Garg <nitin.garg@freescale.com>
Signed-off-by: Ye.Li <B37916@freescale.com>
(cherry picked from commit a7244f279cc3c3994bcd103f5e9a183b1075ae71)

2 files changed, 220 insertions, 0 deletions

diff --git a/board/freescale/common/Makefile b/board/freescale/common/Makefile
index 802b490..7df6af2 100644
--- a/board/freescale/common/Makefile
+++ b/board/freescale/common/Makefile
@@ -63,6 +63,7 @@ obj-$(CONFIG_ZM7300)		+= zm7300.o
 obj-$(CONFIG_POWER_PFUZE100)	+= pfuze.o
 obj-$(CONFIG_POWER_MC34VR500)	+= mc34vr500.o
 obj-$(CONFIG_DM_PMIC_PFUZE100)	+= pfuze_dm.o
+obj-$(CONFIG_MXC_EPDC)		+= epdc_setup.o
 
 obj-$(CONFIG_LS102XA_STREAM_ID)	+= ls102xa_stream_id.o
 
diff --git a/board/freescale/common/epdc_setup.c b/board/freescale/common/epdc_setup.c
new file mode 100644
index 0000000..cd92167
--- /dev/null
+++ b/board/freescale/common/epdc_setup.c
@@ -0,0 +1,219 @@
+/*
+ * Copyright (C) 2016 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * Peng Fan <Peng.Fan@freescale.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <common.h>
+#include <lcd.h>
+#include <linux/err.h>
+#include <linux/types.h>
+#include <malloc.h>
+#include <mxc_epdc_fb.h>
+
+#define is_digit(c)	((c) >= '0' && (c) <= '9')
+__weak int mmc_get_env_devno(void)
+{
+	return 0;
+}
+__weak int check_mmc_autodetect(void)
+{
+	return 0;
+}
+
+int board_setup_waveform_file(ulong waveform_buf)
+{
+	char *fs_argv[5];
+	char addr[17];
+	ulong file_len, mmc_dev;
+
+	if (!check_mmc_autodetect())
+		mmc_dev = getenv_ulong("mmcdev", 10, 0);
+	else
+		mmc_dev = mmc_get_env_devno();
+
+	sprintf(addr, "%lx", waveform_buf);
+
+	fs_argv[0] = "fatload";
+	fs_argv[1] = "mmc";
+	fs_argv[2] = simple_itoa(mmc_dev);
+	fs_argv[3] = addr;
+	fs_argv[4] = getenv("epdc_waveform");
+
+	if (!fs_argv[4])
+		fs_argv[4] = "epdc_splash.bin";
+
+	if (do_fat_fsload(NULL, 0, 5, fs_argv)) {
+		printf("File %s not found on MMC Device %lu!\n", fs_argv[4], mmc_dev);
+		return -1;
+	}
+
+	file_len = getenv_hex("filesize", 0);
+	if (!file_len)
+		return -1;
+
+	flush_cache(waveform_buf, file_len);
+
+	return 0;
+}
+
+int board_setup_logo_file(void *display_buf)
+{
+	int logo_width, logo_height;
+	char *fs_argv[5];
+	char addr[17];
+	int array[3];
+	ulong file_len, mmc_dev;
+	char *buf, *s;
+	int arg = 0, val = 0, pos = 0;
+	int i, j, max_check_length;
+	int row, col, row_end, col_end;
+
+	if (!display_buf)
+		return -EINVAL;
+
+	/* Assume PGM header not exceeds 128 bytes */
+	max_check_length = 128;
+
+	if (!check_mmc_autodetect())
+		mmc_dev = getenv_ulong("mmcdev", 10, 0);
+	else
+		mmc_dev = mmc_get_env_devno();
+
+	memset(display_buf, 0xFF, panel_info.vl_col * panel_info.vl_row);
+
+	fs_argv[0] = "fatsize";
+	fs_argv[1] = "mmc";
+	fs_argv[2] = simple_itoa(mmc_dev);
+	fs_argv[3] = getenv("epdc_logo");
+	if (!fs_argv[3])
+		fs_argv[3] = "epdc_logo.pgm";
+	if (do_fat_size(NULL, 0, 4, fs_argv)) {
+		debug("File %s not found on MMC Device %lu, use black border\n", fs_argv[3], mmc_dev);
+		/* Draw black border around framebuffer*/
+		memset(display_buf, 0x0, 24 * panel_info.vl_col);
+		for (i = 24; i < (panel_info.vl_row - 24); i++) {
+			memset((u8 *)display_buf + i * panel_info.vl_col,
+			       0x00, 24);
+			memset((u8 *)display_buf + i * panel_info.vl_col
+				+ panel_info.vl_col - 24, 0x00, 24);
+		}
+		memset((u8 *)display_buf +
+		       panel_info.vl_col * (panel_info.vl_row - 24),
+		       0x00, 24 * panel_info.vl_col);
+		return 0;
+	}
+
+	file_len = getenv_hex("filesize", 0);
+	if (!file_len)
+		return -EINVAL;
+
+	buf = memalign(ARCH_DMA_MINALIGN, file_len);
+	if (!buf)
+		return -ENOMEM;
+
+	sprintf(addr, "%lx", (ulong)buf);
+
+	fs_argv[0] = "fatload";
+	fs_argv[1] = "mmc";
+	fs_argv[2] = simple_itoa(mmc_dev);
+	fs_argv[3] = addr;
+	fs_argv[4] = getenv("epdc_logo");
+
+	if (!fs_argv[4])
+		fs_argv[4] = "epdc_logo.pgm";
+
+	if (do_fat_fsload(NULL, 0, 5, fs_argv)) {
+		printf("File %s not found on MMC Device %lu!\n", fs_argv[4], mmc_dev);
+		free(buf);
+		return -1;
+	}
+
+	if (strncmp(buf, "P5", 2)) {
+		printf("Wrong format for epdc logo, use PGM-P5 format.\n");
+		free(buf);
+		return -EINVAL;
+	}
+	/* Skip P5\n */
+	pos += 3;
+	arg = 0;
+	for (i = 3; i < max_check_length; ) {
+		/* skip \n \t and space */
+		if ((buf[i] == '\n') || (buf[i] == '\t') || (buf[i] == ' ')) {
+			i++;
+			continue;
+		}
+		/* skip comment */
+		if (buf[i] == '#') {
+			while (buf[i++] != '\n')
+				;
+			continue;
+		}
+
+		/* HEIGTH, WIDTH, MAX PIXEL VLAUE total 3 args */
+		if (arg > 2)
+			break;
+		val = 0;
+		while (is_digit(buf[i])) {
+			val = val * 10 + buf[i] - '0';
+			i++;
+		}
+		array[arg++] = val;
+
+		i++;
+	}
+
+	/* Point to data area */
+	pos = i;
+
+	logo_width = array[0];
+	logo_height = array[1];
+
+	if ((logo_width > panel_info.vl_col) ||
+	    (logo_height > panel_info.vl_row)) {
+		printf("Picture: too big\n");
+		free(buf);
+		return -EINVAL;
+	}
+
+	/* m,m means center of screen */
+	row = 0;
+	col = 0;
+	s = getenv("splashpos");
+	if (s) {
+		if (s[0] == 'm')
+			col = (panel_info.vl_col  - logo_width) >> 1;
+		else
+			col = simple_strtol(s, NULL, 0);
+		s = strchr(s + 1, ',');
+		if (s != NULL) {
+			if (s[1] == 'm')
+				row = (panel_info.vl_row  - logo_height) >> 1;
+			else
+				row = simple_strtol(s + 1, NULL, 0);
+		}
+	}
+	if ((col + logo_width > panel_info.vl_col) ||
+	    (row + logo_height > panel_info.vl_row)) {
+		printf("Incorrect pos, use (0, 0)\n");
+		row = 0;
+		col = 0;
+	}
+
+	/* Draw picture at the center of screen */
+	row_end = row + logo_height;
+	col_end = col + logo_width;
+	for (i = row; i < row_end; i++) {
+		for (j = col; j < col_end; j++) {
+			*((u8 *)display_buf + i * (panel_info.vl_col) + j) =
+				 buf[pos++];
+		}
+	}
+
+	free(buf);
+
+	flush_cache((ulong)display_buf, file_len - pos - 1);
+
+	return 0;
+}