* Patches by Pantelis Antoniou, 30 Mar 2004:

  - add support for the Epson 156x series of graphical displays
    (These displays are serial and not suitable for using a normal
    framebuffer console on them)
  - add infrastructure needed in order to POST any DSPs in a board

1 files changed, 566 insertions, 0 deletions

diff --git a/drivers/sed156x.c b/drivers/sed156x.c
new file mode 100644
index 0000000..e9d5ed4
--- /dev/null
+++ b/drivers/sed156x.c
@@ -0,0 +1,566 @@
+/*
+ * (C) Copyright 2003
+ *
+ * Pantelis Antoniou <panto@intracom.gr>
+ * Intracom S.A.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <watchdog.h>
+
+#include <sed156x.h>
+
+#ifdef CONFIG_SED156X
+
+/* configure according to the selected display */
+#if defined(CONFIG_SED156X_PG12864Q)
+#define LCD_WIDTH	128
+#define LCD_HEIGHT	64
+#define LCD_LINES	64
+#define LCD_PAGES	9
+#define LCD_COLUMNS	132
+#else
+#error Unsupported SED156x configuration
+#endif
+
+/* include the font data */
+#include <video_font.h>
+
+#if VIDEO_FONT_WIDTH != 8 || VIDEO_FONT_HEIGHT != 16
+#error Expecting VIDEO_FONT_WIDTH == 8 && VIDEO_FONT_HEIGHT == 16
+#endif
+
+#define LCD_BYTE_WIDTH		(LCD_WIDTH / 8)
+#define VIDEO_FONT_BYTE_WIDTH	(VIDEO_FONT_WIDTH / 8)
+
+#define LCD_TEXT_WIDTH	(LCD_WIDTH / VIDEO_FONT_WIDTH)
+#define LCD_TEXT_HEIGHT (LCD_HEIGHT / VIDEO_FONT_HEIGHT)
+
+#define LCD_BYTE_LINESZ		(LCD_BYTE_WIDTH * VIDEO_FONT_HEIGHT)
+
+const int sed156x_text_width = LCD_TEXT_WIDTH;
+const int sed156x_text_height = LCD_TEXT_HEIGHT;
+
+/**************************************************************************************/
+
+#define SED156X_SPI_RXD() (SED156X_SPI_RXD_PORT & SED156X_SPI_RXD_MASK)
+
+#define SED156X_SPI_TXD(x) \
+	do { \
+		if (x) \
+			SED156X_SPI_TXD_PORT |=	 SED156X_SPI_TXD_MASK; \
+		else \
+			SED156X_SPI_TXD_PORT &= ~SED156X_SPI_TXD_MASK; \
+	} while(0)
+
+#define SED156X_SPI_CLK(x) \
+	do { \
+		if (x) \
+			SED156X_SPI_CLK_PORT |=	 SED156X_SPI_CLK_MASK; \
+		else \
+			SED156X_SPI_CLK_PORT &= ~SED156X_SPI_CLK_MASK; \
+	} while(0)
+
+#define SED156X_SPI_CLK_TOGGLE() (SED156X_SPI_CLK_PORT ^= SED156X_SPI_CLK_MASK)
+
+#define SED156X_SPI_BIT_DELAY() /* no delay */
+
+#define SED156X_CS(x) \
+	do { \
+		if (x) \
+			SED156X_CS_PORT |=  SED156X_CS_MASK; \
+		else \
+			SED156X_CS_PORT &= ~SED156X_CS_MASK; \
+	} while(0)
+
+#define SED156X_A0(x) \
+	do { \
+		if (x) \
+			SED156X_A0_PORT |=  SED156X_A0_MASK; \
+		else \
+			SED156X_A0_PORT &= ~SED156X_A0_MASK; \
+	} while(0)
+
+/**************************************************************************************/
+
+/*** LCD Commands ***/
+
+#define LCD_ON		0xAF	/* Display ON					      */
+#define LCD_OFF		0xAE	/* Display OFF					      */
+#define LCD_LADDR	0x40	/* Display start line set + (6-bit) address	      */
+#define LCD_PADDR	0xB0	/* Page address set + (4-bit) page		      */
+#define LCD_CADRH	0x10	/* Column address set upper + (4-bit) column hi	      */
+#define LCD_CADRL	0x00	/* Column address set lower + (4-bit) column lo	      */
+#define LCD_ADC_NRM	0xA0	/* ADC select Normal				      */
+#define LCD_ADC_REV	0xA1	/* ADC select Reverse				      */
+#define LCD_DSP_NRM	0xA6	/* LCD display Normal				      */
+#define LCD_DSP_REV	0xA7	/* LCD display Reverse				      */
+#define LCD_DPT_NRM	0xA4	/* Display all points Normal			      */
+#define LCD_DPT_ALL	0xA5	/* Display all points ON			      */
+#define LCD_BIAS9	0xA2	/* LCD bias set 1/9				      */
+#define LCD_BIAS7	0xA3	/* LCD bias set 1/7				      */
+#define LCD_CAINC	0xE0	/* Read/modify/write				      */
+#define LCD_CAEND	0xEE	/* End						      */
+#define LCD_RESET	0xE2	/* Reset					      */
+#define LCD_C_NRM	0xC0	/* Common output mode select Normal direction	      */
+#define LCD_C_RVS	0xC8	/* Common output mode select Reverse direction	      */
+#define LCD_PWRMD	0x28	/* Power control set + (3-bit) mode		      */
+#define LCD_RESRT	0x20	/* V5 v. reg. int. resistor ratio set + (3-bit) ratio */
+#define LCD_EVSET	0x81	/* Electronic volume mode set + byte = (6-bit) volume */
+#define LCD_SIOFF	0xAC	/* Static indicator OFF				      */
+#define LCD_SION	0xAD	/* Static indicator ON + byte = (2-bit) mode	      */
+#define LCD_NOP		0xE3	/* NOP						      */
+#define LCD_TEST	0xF0	/* Test/Test mode reset (Note: *DO NOT USE*)	      */
+
+/*-------------------------------------------------------------------------------
+  Compound commands
+  -------------------------------------------------------------------------------
+  Command	Description			Commands
+  ----------	------------------------	-------------------------------------
+  POWS_ON	POWER SAVER ON command		LCD_OFF, LCD_D_ALL
+  POWS_OFF	POWER SAVER OFF command		LCD_D_NRM
+  SLEEPON	SLEEP mode			LCD_SIOFF, POWS_ON
+  SLEEPOFF	SLEEP mode cancel		LCD_D_NRM, LCD_SION, LCD_SIS_???
+  STDBYON	STAND BY mode			LCD_SION, POWS_ON
+  STDBYOFF	STAND BY mode cancel		LCD_D_NRM
+  -------------------------------------------------------------------------------*/
+
+/*** LCD various parameters ***/
+#define LCD_PPB		8	/* Pixels per byte (display is B/W, 1 bit per pixel) */
+
+/*** LCD Status byte masks ***/
+#define LCD_S_BUSY	0x80	/* Status Read - BUSY mask   */
+#define LCD_S_ADC	0x40	/* Status Read - ADC mask    */
+#define LCD_S_ONOFF	0x20	/* Status Read - ON/OFF mask */
+#define LCD_S_RESET	0x10	/* Status Read - RESET mask  */
+
+/*** LCD commands parameter masks ***/
+#define LCD_M_LADDR	0x3F	/* Display start line (6-bit) address mask	     */
+#define LCD_M_PADDR	0x0F	/* Page address (4-bit) page mask		     */
+#define LCD_M_CADRH	0x0F	/* Column address upper (4-bit) column hi mask	     */
+#define LCD_M_CADRL	0x0F	/* Column address lower (4-bit) column lo mask	     */
+#define LCD_M_PWRMD	0x07	/* Power control (3-bit) mode mask		     */
+#define LCD_M_RESRT	0x07	/* V5 v. reg. int. resistor ratio (3-bit) ratio mask */
+#define LCD_M_EVSET	0x3F	/* Electronic volume mode byte (6-bit) volume mask   */
+#define LCD_M_SION	0x03	/* Static indicator ON (2-bit) mode mask	     */
+
+/*** LCD Power control cirquits control masks ***/
+#define LCD_PWRBSTR	0x04	/* Power control mode - Booster cirquit ON	     */
+#define LCD_PWRVREG	0x02	/* Power control mode - Voltage regulator cirquit ON */
+#define LCD_PWRVFOL	0x01	/* Power control mode - Voltage follower cirquit ON  */
+
+/*** LCD Static indicator states ***/
+#define LCD_SIS_OFF	0x00	/* Static indicator register set - OFF state		 */
+#define LCD_SIS_BL	0x01	/* Static indicator register set - 1s blink state	 */
+#define LCD_SIS_RBL	0x02	/* Static indicator register set - .5s rapid blink state */
+#define LCD_SIS_ON	0x03	/* Static indicator register set - constantly on state	 */
+
+/*** LCD functions special parameters (commands) ***/
+#define LCD_PREVP	0x80	/* Page number for moving to previous */
+#define LCD_NEXTP	0x81	/* or next page */
+#define LCD_ERR_P	0xFF	/* Error in page number */
+
+/*** LCD initialization settings ***/
+#define LCD_BIAS	LCD_BIAS9	/* Bias: 1/9		      */
+#define LCD_ADCMODE	LCD_ADC_NRM	/* ADC mode: normal	      */
+#define LCD_COMDIR	LCD_C_NRM	/* Common output mode: normal */
+#define LCD_RRATIO	0		/* Resistor ratio: 0	      */
+#define LCD_CNTRST	0x1C		/* electronic volume: 1Ch     */
+#define LCD_POWERM	(LCD_PWRBSTR | LCD_PWRVREG | LCD_PWRVFOL)	/* Power mode: All on */
+
+/**************************************************************************************/
+
+static inline unsigned int sed156x_transfer(unsigned int val)
+{
+	unsigned int rx;
+	int b;
+
+	rx = 0; b = 8;
+	while (--b >= 0) {
+		SED156X_SPI_TXD(val & 0x80);
+		val <<= 1;
+		SED156X_SPI_CLK_TOGGLE();
+		SED156X_SPI_BIT_DELAY();
+		rx <<= 1;
+		if (SED156X_SPI_RXD())
+			rx |= 1;
+		SED156X_SPI_CLK_TOGGLE();
+		SED156X_SPI_BIT_DELAY();
+	}
+
+	return rx;
+}
+
+unsigned int sed156x_data_transfer(unsigned int val)
+{
+	unsigned int rx;
+
+	SED156X_SPI_CLK(1);
+	SED156X_CS(0);
+	SED156X_A0(1);
+
+	rx = sed156x_transfer(val);
+
+	SED156X_CS(1);
+
+	return rx;
+}
+
+void sed156x_data_block_transfer(const u8 *p, int size)
+{
+	SED156X_SPI_CLK(1);
+	SED156X_CS(0);
+	SED156X_A0(1);
+
+	while (--size >= 0)
+		sed156x_transfer(*p++);
+
+	SED156X_CS(1);
+}
+
+unsigned int sed156x_cmd_transfer(unsigned int val)
+{
+	unsigned int rx;
+
+	SED156X_SPI_CLK(1);
+	SED156X_CS(0);
+	SED156X_A0(0);
+
+	rx = sed156x_transfer(val);
+
+	SED156X_CS(1);
+	SED156X_A0(1);
+
+	return rx;
+}
+
+/******************************************************************************/
+
+static u8 hw_screen[LCD_PAGES][LCD_COLUMNS];
+static u8 last_hw_screen[LCD_PAGES][LCD_COLUMNS];
+static u8 sw_screen[LCD_BYTE_WIDTH * LCD_HEIGHT];
+
+void sed156x_sync(void)
+{
+	int i, j, last_page;
+	u8 *d;
+	const u8 *s, *e, *b, *r;
+	u8 v0, v1, v2, v3, v4, v5, v6, v7;
+
+	/* copy and rotate sw_screen to hw_screen */
+	for (i = 0; i < LCD_HEIGHT / 8; i++) {
+
+		d = &hw_screen[i][0];
+		s = &sw_screen[LCD_BYTE_WIDTH * 8 * i + LCD_BYTE_WIDTH - 1];
+
+		for (j = 0; j < LCD_WIDTH / 8; j++) {
+
+			v0 = s[0 * LCD_BYTE_WIDTH];
+			v1 = s[1 * LCD_BYTE_WIDTH];
+			v2 = s[2 * LCD_BYTE_WIDTH];
+			v3 = s[3 * LCD_BYTE_WIDTH];
+			v4 = s[4 * LCD_BYTE_WIDTH];
+			v5 = s[5 * LCD_BYTE_WIDTH];
+			v6 = s[6 * LCD_BYTE_WIDTH];
+			v7 = s[7 * LCD_BYTE_WIDTH];
+
+			d[0] =	((v7 & 0x01) << 7) |
+				((v6 & 0x01) << 6) |
+				((v5 & 0x01) << 5) |
+				((v4 & 0x01) << 4) |
+				((v3 & 0x01) << 3) |
+				((v2 & 0x01) << 2) |
+				((v1 & 0x01) << 1) |
+				 (v0 & 0x01)	   ;
+
+			d[1] =	((v7 & 0x02) << 6) |
+				((v6 & 0x02) << 5) |
+				((v5 & 0x02) << 4) |
+				((v4 & 0x02) << 3) |
+				((v3 & 0x02) << 2) |
+				((v2 & 0x02) << 1) |
+				((v1 & 0x02) << 0) |
+				((v0 & 0x02) >> 1) ;
+
+			d[2] =	((v7 & 0x04) << 5) |
+				((v6 & 0x04) << 4) |
+				((v5 & 0x04) << 3) |
+				((v4 & 0x04) << 2) |
+				((v3 & 0x04) << 1) |
+				 (v2 & 0x04)	   |
+				((v1 & 0x04) >> 1) |
+				((v0 & 0x04) >> 2) ;
+
+			d[3] =	((v7 & 0x08) << 4) |
+				((v6 & 0x08) << 3) |
+				((v5 & 0x08) << 2) |
+				((v4 & 0x08) << 1) |
+				 (v3 & 0x08)	   |
+				((v2 & 0x08) >> 1) |
+				((v1 & 0x08) >> 2) |
+				((v0 & 0x08) >> 3) ;
+
+			d[4] =	((v7 & 0x10) << 3) |
+				((v6 & 0x10) << 2) |
+				((v5 & 0x10) << 1) |
+				 (v4 & 0x10)	   |
+				((v3 & 0x10) >> 1) |
+				((v2 & 0x10) >> 2) |
+				((v1 & 0x10) >> 3) |
+				((v0 & 0x10) >> 4) ;
+
+			d[5] =	((v7 & 0x20) << 2) |
+				((v6 & 0x20) << 1) |
+				 (v5 & 0x20)	   |
+				((v4 & 0x20) >> 1) |
+				((v3 & 0x20) >> 2) |
+				((v2 & 0x20) >> 3) |
+				((v1 & 0x20) >> 4) |
+				((v0 & 0x20) >> 5) ;
+
+			d[6] =	((v7 & 0x40) << 1) |
+				 (v6 & 0x40)	   |
+				((v5 & 0x40) >> 1) |
+				((v4 & 0x40) >> 2) |
+				((v3 & 0x40) >> 3) |
+				((v2 & 0x40) >> 4) |
+				((v1 & 0x40) >> 5) |
+				((v0 & 0x40) >> 6) ;
+
+			d[7] =	 (v7 & 0x80)	   |
+				((v6 & 0x80) >> 1) |
+				((v5 & 0x80) >> 2) |
+				((v4 & 0x80) >> 3) |
+				((v3 & 0x80) >> 4) |
+				((v2 & 0x80) >> 5) |
+				((v1 & 0x80) >> 6) |
+				((v0 & 0x80) >> 7) ;
+
+			d += 8;
+			s--;
+		}
+	}
+
+	/* and now output only the differences */
+	for (i = 0; i < LCD_PAGES; i++) {
+
+		b = &hw_screen[i][0];
+		e = &hw_screen[i][LCD_COLUMNS];
+
+		d = &last_hw_screen[i][0];
+		s = b;
+
+		last_page = -1;
+
+		/* update only the differences */
+		do {
+			while (s < e && *s == *d) {
+				s++;
+				d++;
+			}
+			if (s == e)
+				break;
+			r = s;
+			while (s < e && *s != *d)
+				*d++ = *s++;
+
+			j = r - b;
+
+			if (i != last_page) {
+				sed156x_cmd_transfer(LCD_PADDR | i);
+				last_page = i;
+			}
+
+			sed156x_cmd_transfer(LCD_CADRH | ((j >> 4) & 0x0F));
+			sed156x_cmd_transfer(LCD_CADRL | (j & 0x0F));
+			sed156x_data_block_transfer(r, s - r);
+
+		} while (s < e);
+	}
+
+/********
+	for (i = 0; i < LCD_PAGES; i++) {
+		sed156x_cmd_transfer(LCD_PADDR | i);
+		sed156x_cmd_transfer(LCD_CADRH | 0);
+		sed156x_cmd_transfer(LCD_CADRL | 0);
+		sed156x_data_block_transfer(&hw_screen[i][0], LCD_COLUMNS);
+	}
+	memcpy(last_hw_screen, hw_screen, sizeof(last_hw_screen));
+********/
+}
+
+void sed156x_clear(void)
+{
+	memset(sw_screen, 0, sizeof(sw_screen));
+}
+
+void sed156x_output_at(int x, int y, const char *str, int size)
+{
+	int i, j;
+	u8 *p;
+	const u8 *s;
+
+	if ((unsigned int)y >= LCD_TEXT_HEIGHT || (unsigned int)x >= LCD_TEXT_WIDTH)
+		return;
+
+	p = &sw_screen[y * VIDEO_FONT_HEIGHT * LCD_BYTE_WIDTH + x * VIDEO_FONT_BYTE_WIDTH];
+
+	while (--size >= 0) {
+
+		s = &video_fontdata[((int)*str++ & 0xff) * VIDEO_FONT_BYTE_WIDTH * VIDEO_FONT_HEIGHT];
+		for (i = 0; i < VIDEO_FONT_HEIGHT; i++) {
+			for (j = 0; j < VIDEO_FONT_BYTE_WIDTH; j++)
+				*p++ = *s++;
+			p += LCD_BYTE_WIDTH - VIDEO_FONT_BYTE_WIDTH;
+		}
+		p -= (LCD_BYTE_LINESZ - VIDEO_FONT_BYTE_WIDTH);
+
+		if (x >= LCD_TEXT_WIDTH)
+			break;
+		x++;
+	}
+}
+
+void sed156x_reverse_at(int x, int y, int size)
+{
+	int i, j;
+	u8 *p;
+
+	if ((unsigned int)y >= LCD_TEXT_HEIGHT || (unsigned int)x >= LCD_TEXT_WIDTH)
+		return;
+
+	p = &sw_screen[y * VIDEO_FONT_HEIGHT * LCD_BYTE_WIDTH + x * VIDEO_FONT_BYTE_WIDTH];
+
+	while (--size >= 0) {
+
+		for (i = 0; i < VIDEO_FONT_HEIGHT; i++) {
+			for (j = 0; j < VIDEO_FONT_BYTE_WIDTH; j++, p++)
+				*p = ~*p;
+			p += LCD_BYTE_WIDTH - VIDEO_FONT_BYTE_WIDTH;
+		}
+		p -= (LCD_BYTE_LINESZ - VIDEO_FONT_BYTE_WIDTH);
+
+		if (x >= LCD_TEXT_WIDTH)
+			break;
+		x++;
+	}
+}
+
+void sed156x_scroll_line(void)
+{
+	memmove(&sw_screen[0],
+			&sw_screen[LCD_BYTE_LINESZ],
+			LCD_BYTE_WIDTH * (LCD_HEIGHT - VIDEO_FONT_HEIGHT));
+}
+
+void sed156x_scroll(int dx, int dy)
+{
+	u8 *p1 = NULL, *p2 = NULL, *p3 = NULL;	/* pacify gcc */
+	int adx, ady, i, sz;
+
+	adx = dx > 0 ? dx : -dx;
+	ady = dy > 0 ? dy : -dy;
+
+	/* overscroll? erase everything */
+	if (adx >= LCD_TEXT_WIDTH || ady >= LCD_TEXT_HEIGHT) {
+		memset(sw_screen, 0, sizeof(sw_screen));
+		return;
+	}
+
+	sz = LCD_BYTE_LINESZ * ady;
+	if (dy > 0) {
+		p1 = &sw_screen[0];
+		p2 = &sw_screen[sz];
+		p3 = &sw_screen[LCD_BYTE_WIDTH * LCD_HEIGHT - sz];
+	} else if (dy < 0) {
+		p1 = &sw_screen[sz];
+		p2 = &sw_screen[0];
+		p3 = &sw_screen[0];
+	}
+
+	if (ady > 0) {
+		memmove(p1, p2, LCD_BYTE_WIDTH * LCD_HEIGHT - sz);
+		memset(p3, 0, sz);
+	}
+
+	sz = VIDEO_FONT_BYTE_WIDTH * adx;
+	if (dx > 0) {
+		p1 = &sw_screen[0];
+		p2 = &sw_screen[0] + sz;
+		p3 = &sw_screen[0] + LCD_BYTE_WIDTH - sz;
+	} else if (dx < 0) {
+		p1 = &sw_screen[0] + sz;
+		p2 = &sw_screen[0];
+		p3 = &sw_screen[0];
+	}
+
+	/* xscroll */
+	if (adx > 0) {
+		for (i = 0; i < LCD_HEIGHT; i++) {
+			memmove(p1, p2, LCD_BYTE_WIDTH - sz);
+			memset(p3, 0, sz);
+			p1 += LCD_BYTE_WIDTH;
+			p2 += LCD_BYTE_WIDTH;
+			p3 += LCD_BYTE_WIDTH;
+		}
+	}
+}
+
+void sed156x_init(void)
+{
+	int i;
+
+	SED156X_CS(1);
+	SED156X_A0(1);
+
+	/* Send initialization commands to the LCD */
+	sed156x_cmd_transfer(LCD_OFF);			/* Turn display OFF	  */
+	sed156x_cmd_transfer(LCD_BIAS);			/* set the LCD Bias,	  */
+	sed156x_cmd_transfer(LCD_ADCMODE);		/* ADC mode,		  */
+	sed156x_cmd_transfer(LCD_COMDIR);		/* common output mode,	  */
+	sed156x_cmd_transfer(LCD_RESRT | LCD_RRATIO);	/* resistor ratio,	  */
+	sed156x_cmd_transfer(LCD_EVSET);		/* electronic volume,	  */
+	sed156x_cmd_transfer(LCD_CNTRST);
+	sed156x_cmd_transfer(LCD_PWRMD | LCD_POWERM);	/* and power mode	  */
+	sed156x_cmd_transfer(LCD_PADDR | 0);		/* cursor home		  */
+	sed156x_cmd_transfer(LCD_CADRH | 0);
+	sed156x_cmd_transfer(LCD_CADRL | 0);
+	sed156x_cmd_transfer(LCD_LADDR | 0);		/* and display start line */
+	sed156x_cmd_transfer(LCD_DSP_NRM);		/* LCD display Normal	  */
+
+	/* clear everything */
+	memset(sw_screen, 0, sizeof(sw_screen));
+	memset(hw_screen, 0, sizeof(hw_screen));
+	memset(last_hw_screen, 0, sizeof(last_hw_screen));
+
+	for (i = 0; i < LCD_PAGES; i++) {
+		sed156x_cmd_transfer(LCD_PADDR | i);
+		sed156x_cmd_transfer(LCD_CADRH | 0);
+		sed156x_cmd_transfer(LCD_CADRL | 0);
+		sed156x_data_block_transfer(&hw_screen[i][0], LCD_COLUMNS);
+	}
+
+	sed156x_clear();
+	sed156x_sync();
+	sed156x_cmd_transfer(LCD_ON);			/* Turn display ON	  */
+}
+
+#endif	/* CONFIG_SED156X */