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Untested attempt at a Clip+ LCD driver using SSP (PrimeCell PL022)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24523 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rafaël Carré 2010-02-05 15:12:08 +00:00
parent 507d7bdb0e
commit c8ea43f095
2 changed files with 69 additions and 7 deletions
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62
firmware/target/arm/as3525/sansa-clip/lcd-ssd1303.c
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@ -73,10 +73,11 @@
#define LCD_CNTL_HIGHCOL 0x10 /* Upper column address */
#define LCD_CNTL_LOWCOL 0x00 /* Lower column address */
/* DBOP initialisation, do what OF does */
static void ams3525_dbop_init(void)
static void lcd_hw_init(void)
{
#ifdef SANSA_CLIP
#if defined(SANSA_CLIP)
/* DBOP initialisation, do what OF does */
CGU_DBOP = (1<<3) | AS3525_DBOP_DIV;
GPIOB_AFSEL = 0x08; /* DBOP on pin 3 */
@ -85,13 +86,21 @@ static void ams3525_dbop_init(void)
DBOP_CTRL = 0x51008;
DBOP_TIMPOL_01 = 0x6E167;
DBOP_TIMPOL_23 = 0xA167E06F;
#else /* SANSA_CLIPV2 */
#elif defined(SANSA_CLIPV2)
/* DBOP initialisation, do what OF does */
CCU_IO |= (1<<12); /* ?? */
CGU_DBOP |= /*(1<<3)*/ 0x18 | AS3525_DBOP_DIV;
DBOP_CTRL = 0x51004;
DBOP_TIMPOL_01 = 0x36A12F;
DBOP_TIMPOL_23 = 0xE037E037;
#elif defined(SANSA_CLIPPLUS)
CGU_PERI |= CGU_SSP_CLOCK_ENABLE;
SSP_CPSR; /* No clock prescale */
SSP_CR0 = 0 | 7; /* Motorola SPI frame format, 8 bits */
SSP_CR1 = 1<<1; /* SSP Operation enabled */
SSP_IMSC = 0; /* No interrupts */
#endif
}
@ -101,6 +110,7 @@ static void ams3525_dbop_init(void)
#define LCD_DELAY 10
#endif
#if defined(SANSA_CLIP) || defined(SANSA_CLIPV2)
void lcd_write_command(int byte)
{
volatile int i = 0;
@ -126,7 +136,21 @@ void lcd_write_command(int byte)
DBOP_TIMPOL_23 = 0xE037E037;
#endif
}
#elif defined(SANSA_CLIPPLUS)
void lcd_write_command(int byte)
{
while(SSP_SR & (1<<4)) /* BSY flag */
;
GPIOB_PIN(2) = 0;
SSP_DATA = byte;
while(SSP_SR & (1<<4)) /* BSY flag */
;
}
#endif
#if defined(SANSA_CLIP) || defined(SANSA_CLIPV2)
void lcd_write_data(const fb_data* p_bytes, int count)
{
volatile int i = 0;
@ -152,6 +176,23 @@ void lcd_write_data(const fb_data* p_bytes, int count)
/* While push fifo is not empty */
while ((DBOP_STAT & (1<<10)) == 0);
}
#elif defined(SANSA_CLIPPLUS)
void lcd_write_data(const fb_data* p_bytes, int count)
{
GPIOB_PIN(2) = (1<<2);
SSP_CR0 = 0 | 15; /* Motorola SPI frame format, 16 bits */
while (count--)
{
while(SSP_SR & (1<<1)) /* Transmit FIFO is not full */
SSP_DATA = *p_bytes++;
while(!(SSP_SR & (1<<0))) /* Transmit FIFO is not empty */
;
}
SSP_CR0 = 0 | 7; /* Motorola SPI frame format, 8 bits */
}
#endif
/** globals **/
@ -234,9 +275,9 @@ void lcd_init_device(void)
#define LCD_FULLSCREEN (128+4)
fb_data p_bytes[LCD_FULLSCREEN]; /* framebuffer used to clear the screen */
ams3525_dbop_init();
lcd_hw_init();
#ifdef SANSA_CLIP
#if defined(SANSA_CLIP)
GPIOA_DIR |= 0x33; /* pins 5:4 and 1:0 out */
GPIOB_DIR |= 0x40; /* pin 6 out */
@ -244,9 +285,16 @@ void lcd_init_device(void)
GPIOA_PIN(0) = (1<<0);
GPIOA_PIN(4) = 0;
GPIOB_PIN(6) = (1<<6);
#else /* SANSA_CLIPV2 */
#elif defined(SANSA_CLIPV2)
GPIOB_DIR |= (1<<2)|(1<<5);
GPIOB_PIN(5) = (1<<5);
#elif defined(SANSA_CLIPPLUS)
GPIOA_DIR |= (1<<5);
GPIOB_DIR |= (1<<2) | (1<<7);
GPIOA_PIN(5) = 0;
GPIOA_DIR &= (1<<0);
GPIOA_PIN(0) = (1<<0);
GPIOB_PIN(7) = (1<<7);
#endif
/* Set display clock (divide ratio = 1) and oscillator frequency (1) */