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Diffstat (limited to 'Src/osmocom-bb/src/target/firmware/display/ssd1783.c')
-rw-r--r--Src/osmocom-bb/src/target/firmware/display/ssd1783.c257
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diff --git a/Src/osmocom-bb/src/target/firmware/display/ssd1783.c b/Src/osmocom-bb/src/target/firmware/display/ssd1783.c
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+++ b/Src/osmocom-bb/src/target/firmware/display/ssd1783.c
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+/* Solomon SSD1783 LCD Driver (Epson S1D15G10D08B000 clone) */
+
+/* (C) 2010 by Steve Markgraf <steve@steve-m.de>
+ * (C) 2010 by Harald Welte <laforge@gnumonks.org>
+ *
+ * All Rights Reserved
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+//#define DEBUG
+#include <debug.h>
+#include <delay.h>
+#include <uwire.h>
+#include <display.h>
+#include <display/ssd1783.h>
+#include <calypso/clock.h>
+
+#define LCD_COLUMNS 98
+#define LCD_ROWS 67
+#define LCD_TOP_FREE_ROWS 3
+#define LCD_LEFT_FREE_COLS 0
+#define PIXEL_BYTES 3
+#define SSD1783_UWIRE_BITLEN 9
+#define SSD1783_DEV_ID 0
+#define FONT_HEIGHT 8
+#define FONT_WIDTH 8
+
+static const uint8_t rgb8_palette[] ={
+ 0x00, //P01 Intermediate red tone 000
+ 0x03, //P02 Intermediate red tone 001
+ 0x05, //P03 Intermediate red tone 010
+ 0x07, //P04 Intermediate red tone 011
+ 0x09, //P05 Intermediate red tone 100
+ 0x0b, //P06 Intermediate red tone 101
+ 0x0d, //P07 Intermediate red tone 110
+ 0x0f, //P08 Intermediate red tone 111
+ 0x00, //P09 Intermediate green tone 000
+ 0x03, //P10 Intermediate green tone 001
+ 0x05, //P11 Intermediate green tone 010
+ 0x07, //P12 Intermediate green tone 011
+ 0x09, //P13 Intermediate green tone 100
+ 0x0b, //P14 Intermediate green tone 101
+ 0x0d, //P15 Intermediate green tone 110
+ 0x0f, //P16 Intermediate green tone 111
+ 0x00, //P17 Intermediate blue tone 00
+ 0x05, //P18 Intermediate blue tone 01
+ 0x0a, //P19 Intermediate blue tone 10
+ 0x0f, //P20 Intermediate blue tone 11
+};
+
+static void ssd1783_cmd_write(const uint8_t cmd)
+{
+ uint16_t cmd_out = cmd;
+ uwire_xfer(SSD1783_DEV_ID, SSD1783_UWIRE_BITLEN, &cmd_out, NULL);
+}
+
+static void ssd1783_data_write(const uint8_t data)
+{
+ uint16_t data_out = ((0x01 << 8) + data);
+ uwire_xfer(SSD1783_DEV_ID, SSD1783_UWIRE_BITLEN, &data_out, NULL);
+}
+
+static void ssd1783_clrscr(void)
+{
+ uint16_t i;
+
+ /* Select the whole display area for clearing */
+ ssd1783_cmd_write(CMD_PASET); /* Page address set [2] */
+ ssd1783_data_write(0x00); /* Start page: 0x00 */
+ ssd1783_data_write(LCD_ROWS-1); /* End page */
+ ssd1783_cmd_write(CMD_CASET); /* Column address set [2] */
+ ssd1783_data_write(0x00); /* Start column: 0x00 */
+ ssd1783_data_write((LCD_COLUMNS/2)-1); /* End column (2 pixels per column) */
+ ssd1783_cmd_write(CMD_RAMWR); /* Write to memory */
+
+ /* Fill the display with white */
+ for(i=0; i < (LCD_ROWS * (LCD_COLUMNS/2) * PIXEL_BYTES); i++){
+ ssd1783_data_write(0xff);
+ }
+ ssd1783_cmd_write(CMD_NOP); /* Terminate RAMWR with NOP */
+}
+
+static void ssd1783_init(void)
+{
+ unsigned int i;
+
+ calypso_reset_set(RESET_EXT, 0);
+ uwire_init();
+ delay_ms(3);
+
+ /* Begin SSD1783 initialization sequence */
+ ssd1783_cmd_write(CMD_OSCON); /* Internal OSC on */
+ ssd1783_cmd_write(CMD_SLPOUT); /* Sleep out (Leave sleep mode) */
+
+ ssd1783_cmd_write(CMD_COMSCN); /* Common scan direction [1] */
+ ssd1783_data_write(0x01); /* Scan 1 -> 68, 132 <- 69 */
+ ssd1783_cmd_write(CMD_DATCTL); /* Data Scan Direction [3] */
+ ssd1783_data_write(0x00); /* Normal page address, normal rotation,
+ * scan direction in column direction */
+ ssd1783_data_write(0x00); /* RGB arrangement: RGB-RGB */
+ ssd1783_data_write(0x02); /* Gray-scale setup: 16 gray-scale Type A, 8-bit mode */
+
+ /* Initialize RGB8 palette for 8-Bit color mode */
+ ssd1783_cmd_write(CMD_RGBSET8); /* 256-color position set [20] */
+ for(i=0; i < sizeof(rgb8_palette); i++){
+ ssd1783_data_write(rgb8_palette[i]);
+ }
+
+ ssd1783_cmd_write(CMD_DISCTL); /* Display control [3] */
+ ssd1783_data_write(0xff); /* no clock division, F1, F2 switching period = field */
+ ssd1783_data_write(0x10); /* Drive duty, P24 = 1 */
+ ssd1783_data_write(0x01); /* FR inverse set, P30=1 */
+ ssd1783_cmd_write(CMD_SCSTART); /* Scroll start set [1] */
+ ssd1783_data_write(0x00); /* Start block address 0x00 */
+
+ /* Turn on the power regulator which generates VLCD */
+ ssd1783_cmd_write(CMD_PWRCTR); /* Power Control [1] */
+ ssd1783_data_write(0x0b); /* Booster, follower and regulator circuit on */
+
+ /* FIXME: put this in a separate function (ssd1783_set_contrast) */
+ ssd1783_cmd_write(CMD_VOLCTR); /* Electronic Volume Control [2] */
+ ssd1783_data_write(0x29); /* Set contrast */
+ ssd1783_data_write(0x05); /* Set contrast */
+
+ ssd1783_cmd_write(CMD_DISINV); /* Invert Display */
+ ssd1783_cmd_write(CMD_TMPGRD); /* Temperature gradient set */
+ ssd1783_data_write(0x00); /* default temperature gradient (-0.05% / °C) */
+ ssd1783_cmd_write(CMD_BIASSET); /* Set biasing ratio [1] */
+ ssd1783_data_write(0x03); /* 1/10 bias */
+ ssd1783_cmd_write(CMD_FREQSET); /* Set frequency and n-line inversion [2] */
+ ssd1783_data_write(0x08); /* frequency: 75Hz (POR) */
+ ssd1783_data_write(0x06); /* n-line inversion: 6 lines */
+ ssd1783_cmd_write(CMD_RESCMD); /* reserved command in datasheet? */
+ ssd1783_cmd_write(CMD_PWMSEL); /* Select PWM/FRC, Full/8 color mode [3] */
+ ssd1783_data_write(0x28); /* fixed */
+ ssd1783_data_write(0x2c); /* 5 bits PWM + 1 bit FRC (POR) */
+ ssd1783_data_write(0x05); /* Full color mode (0x45 would be 8 color powersaving) */
+
+ ssd1783_cmd_write(CMD_DISON); /* Display ON */
+ ssd1783_clrscr(); /* Clear the display */
+}
+
+extern const unsigned char fontdata_r8x8_horiz[];
+
+/*
+ * Pixel format for 8-bit mode, 12-bit color, 2 Pixel per 3 byte
+ * D7, D6, D5, D4, D3, D2, D1, D0: RRRRGGGG (8 bits) 1st write
+ * D7, D6, D5, D4, D3, D2, D1, D0: BBBBRRRR (8 bits) 2nd write
+ * D7, D6, D5, D4, D3, D2, D1, D0: GGGGBBBB (8 bits) 3rd write
+*/
+
+static void ssd1783_goto_xy(int xpos, int ypos)
+{
+ ssd1783_cmd_write(CMD_PASET);
+ ssd1783_data_write(xpos);
+ ssd1783_data_write(xpos + (FONT_HEIGHT-1));
+
+ ssd1783_cmd_write(CMD_CASET);
+ ssd1783_data_write(ypos);
+ ssd1783_data_write(ypos + ((FONT_WIDTH/2)-1));
+
+ ssd1783_cmd_write(CMD_NOP);
+}
+
+static int ssd1783_putc_col(unsigned char c, int fColor, int bColor)
+{
+ int i, j;
+ uint8_t cols = FONT_WIDTH;
+ uint8_t rows = FONT_HEIGHT;
+ uint8_t row_slice;
+ uint8_t rowmask;
+ uint16_t pixel0; /* left pixel */
+ uint16_t pixel1; /* right pixel */
+
+ ssd1783_cmd_write(CMD_RAMWR);
+
+ for (i = 0; i < rows; i++) {
+ row_slice = fontdata_r8x8_horiz[(FONT_WIDTH * c)+i];
+ printd("\nSSD1783 FontData=0x%02hx", row_slice);
+ rowmask = 0x80;
+ for (j = 0; j < cols; j += 2) {
+ if (!(row_slice & rowmask))
+ pixel0 = bColor;
+ else
+ pixel0 = fColor;
+ rowmask = rowmask >> 1;
+ if (!(row_slice & rowmask))
+ pixel1 = bColor;
+ else
+ pixel1 = fColor;
+ rowmask = rowmask >> 1;
+ /* Write the RGB-RGB pixel data */
+ ssd1783_data_write((pixel0 >> 4) & 0xff);
+ ssd1783_data_write(((pixel0 & 0x00f) << 4) | ((pixel1 >> 8) & 0x00f));
+ ssd1783_data_write(pixel1 & 0xff);
+ }
+ }
+ ssd1783_cmd_write(CMD_NOP);
+
+ return c;
+}
+
+static int ssd1783_puts_col(const char *str, int txtline, int fColor, int bColor)
+{
+ int i;
+ for (i = 0; *str != 0x00; i += (FONT_WIDTH/2)) {
+ ssd1783_goto_xy(((txtline*FONT_HEIGHT)+LCD_TOP_FREE_ROWS),
+ (i + LCD_LEFT_FREE_COLS));
+ ssd1783_putc_col(*str++, fColor, bColor);
+ }
+
+ return 0;
+}
+
+/* interface to display driver core */
+
+static void ssd1783_set_attr(unsigned long attr)
+{
+ /* FIXME */
+}
+
+static int ssd1783_putc(unsigned int c)
+{
+ return ssd1783_putc_col(c, BLACK, WHITE);
+}
+
+static int ssd1783_puts(const char *str)
+{
+ return ssd1783_puts_col(str, 0, BLACK, WHITE);
+}
+
+const struct display_driver ssd1783_display = {
+ .name = "ssd1783",
+ .init = &ssd1783_init,
+ .set_attr = &ssd1783_set_attr,
+ .unset_attr = &ssd1783_set_attr,
+ .clrscr = &ssd1783_clrscr,
+ .goto_xy = &ssd1783_goto_xy,
+ .putc = &ssd1783_putc,
+ .puts = &ssd1783_puts,
+};