zipitz2.c
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/*
* Copyright (C) 2009
* Marek Vasut <marek.vasut@gmail.com>
*
* Heavily based on pxa255_idp platform
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <command.h>
#include <serial.h>
#include <asm/arch/hardware.h>
#include <asm/arch/pxa.h>
#include <asm/arch/regs-mmc.h>
#include <spi.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_CMD_SPI
void lcd_start(void);
#else
inline void lcd_start(void) {};
#endif
/*
* Miscelaneous platform dependent initialisations
*/
int board_init (void)
{
/* We have RAM, disable cache */
dcache_disable();
icache_disable();
/* arch number of Z2 */
gd->bd->bi_arch_number = MACH_TYPE_ZIPIT2;
/* adress of boot parameters */
gd->bd->bi_boot_params = 0xa0000100;
/* Enable LCD */
lcd_start();
return 0;
}
int dram_init(void)
{
pxa2xx_dram_init();
gd->ram_size = PHYS_SDRAM_1_SIZE;
return 0;
}
void dram_init_banksize(void)
{
gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
}
#ifdef CONFIG_CMD_MMC
int board_mmc_init(bd_t *bis)
{
pxa_mmc_register(0);
return 0;
}
#endif
#ifdef CONFIG_CMD_SPI
struct {
unsigned char reg;
unsigned short data;
unsigned char mdelay;
} lcd_data[] = {
{ 0x07, 0x0000, 0 },
{ 0x13, 0x0000, 10 },
{ 0x11, 0x3004, 0 },
{ 0x14, 0x200F, 0 },
{ 0x10, 0x1a20, 0 },
{ 0x13, 0x0040, 50 },
{ 0x13, 0x0060, 0 },
{ 0x13, 0x0070, 200 },
{ 0x01, 0x0127, 0 },
{ 0x02, 0x0700, 0 },
{ 0x03, 0x1030, 0 },
{ 0x08, 0x0208, 0 },
{ 0x0B, 0x0620, 0 },
{ 0x0C, 0x0110, 0 },
{ 0x30, 0x0120, 0 },
{ 0x31, 0x0127, 0 },
{ 0x32, 0x0000, 0 },
{ 0x33, 0x0503, 0 },
{ 0x34, 0x0727, 0 },
{ 0x35, 0x0124, 0 },
{ 0x36, 0x0706, 0 },
{ 0x37, 0x0701, 0 },
{ 0x38, 0x0F00, 0 },
{ 0x39, 0x0F00, 0 },
{ 0x40, 0x0000, 0 },
{ 0x41, 0x0000, 0 },
{ 0x42, 0x013f, 0 },
{ 0x43, 0x0000, 0 },
{ 0x44, 0x013f, 0 },
{ 0x45, 0x0000, 0 },
{ 0x46, 0xef00, 0 },
{ 0x47, 0x013f, 0 },
{ 0x48, 0x0000, 0 },
{ 0x07, 0x0015, 30 },
{ 0x07, 0x0017, 0 },
{ 0x20, 0x0000, 0 },
{ 0x21, 0x0000, 0 },
{ 0x22, 0x0000, 0 },
};
void zipitz2_spi_sda(int set)
{
/* GPIO 13 */
if (set)
writel((1 << 13), GPSR0);
else
writel((1 << 13), GPCR0);
}
void zipitz2_spi_scl(int set)
{
/* GPIO 22 */
if (set)
writel((1 << 22), GPCR0);
else
writel((1 << 22), GPSR0);
}
unsigned char zipitz2_spi_read(void)
{
/* GPIO 40 */
return !!(readl(GPLR1) & (1 << 8));
}
int spi_cs_is_valid(unsigned int bus, unsigned int cs)
{
/* Always valid */
return 1;
}
void spi_cs_activate(struct spi_slave *slave)
{
/* GPIO 88 low */
writel((1 << 24), GPCR2);
}
void spi_cs_deactivate(struct spi_slave *slave)
{
/* GPIO 88 high */
writel((1 << 24), GPSR2);
}
void lcd_start(void)
{
int i;
unsigned char reg[3] = { 0x74, 0x00, 0 };
unsigned char data[3] = { 0x76, 0, 0 };
unsigned char dummy[3] = { 0, 0, 0 };
/* PWM2 AF */
writel(readl(GAFR0_L) | 0x00800000, GAFR0_L);
/* Enable clock to all PWM */
writel(readl(CKEN) | 0x3, CKEN);
/* Configure PWM2 */
writel(0x4f, PWM_CTRL2);
writel(0x2ff, PWM_PWDUTY2);
writel(792, PWM_PERVAL2);
/* Toggle the reset pin to reset the LCD */
writel((1 << 19), GPSR0);
udelay(100000);
writel((1 << 19), GPCR0);
udelay(20000);
writel((1 << 19), GPSR0);
udelay(20000);
/* Program the LCD init sequence */
for (i = 0; i < sizeof(lcd_data) / sizeof(lcd_data[0]); i++) {
reg[0] = 0x74;
reg[1] = 0x0;
reg[2] = lcd_data[i].reg;
spi_xfer(NULL, 24, reg, dummy, SPI_XFER_BEGIN | SPI_XFER_END);
data[0] = 0x76;
data[1] = lcd_data[i].data >> 8;
data[2] = lcd_data[i].data & 0xff;
spi_xfer(NULL, 24, data, dummy, SPI_XFER_BEGIN | SPI_XFER_END);
if (lcd_data[i].mdelay)
udelay(lcd_data[i].mdelay * 1000);
}
writel((1 << 11), GPSR0);
}
#endif