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u-boot/drivers/sed156x.c
wdenk 5a8c51cd5e * 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
2004-04-15 21:16:42 +00:00

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/*
* (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 */
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