109 lines
2.4 KiB
C
109 lines
2.4 KiB
C
/*
|
|
* Copyright (C) 2011 Renesas Solutions Corp.
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU Lesser
|
|
* General Public License. See the file "COPYING.LIB" in the main
|
|
* directory of this archive for more details.
|
|
*/
|
|
|
|
#include <common.h>
|
|
|
|
#define CONFIG_RAM_BOOT_PHYS 0x4ef80000
|
|
#if defined(CONFIG_SH7757_OFFSET_SPI)
|
|
#define CONFIG_SPI_ADDR 0x00010000
|
|
#else
|
|
#define CONFIG_SPI_ADDR 0x00000000
|
|
#endif
|
|
#define CONFIG_SPI_LENGTH 0x00030000
|
|
#define CONFIG_RAM_BOOT 0x8ef80000
|
|
|
|
#define SPIWDMADR 0xFE001018
|
|
#define SPIWDMCNTR 0xFE001020
|
|
#define SPIDMCOR 0xFE001028
|
|
#define SPIDMINTSR 0xFE001188
|
|
#define SPIDMINTMR 0xFE001190
|
|
|
|
#define SPIDMINTSR_DMEND 0x00000004
|
|
|
|
#define TBR 0xFE002000
|
|
#define RBR 0xFE002000
|
|
|
|
#define CR1 0xFE002008
|
|
#define CR2 0xFE002010
|
|
#define CR3 0xFE002018
|
|
#define CR4 0xFE002020
|
|
|
|
/* CR1 */
|
|
#define SPI_TBE 0x80
|
|
#define SPI_TBF 0x40
|
|
#define SPI_RBE 0x20
|
|
#define SPI_RBF 0x10
|
|
#define SPI_PFONRD 0x08
|
|
#define SPI_SSDB 0x04
|
|
#define SPI_SSD 0x02
|
|
#define SPI_SSA 0x01
|
|
|
|
/* CR2 */
|
|
#define SPI_RSTF 0x80
|
|
#define SPI_LOOPBK 0x40
|
|
#define SPI_CPOL 0x20
|
|
#define SPI_CPHA 0x10
|
|
#define SPI_L1M0 0x08
|
|
|
|
/* CR4 */
|
|
#define SPI_TBEI 0x80
|
|
#define SPI_TBFI 0x40
|
|
#define SPI_RBEI 0x20
|
|
#define SPI_RBFI 0x10
|
|
#define SPI_SSS 0x01
|
|
|
|
#define spi_write(val, addr) (*(volatile unsigned long *)(addr)) = val
|
|
#define spi_read(addr) (*(volatile unsigned long *)(addr))
|
|
|
|
/* M25P80 */
|
|
#define M25_READ 0x03
|
|
|
|
#define __uses_spiboot2 __attribute__((section(".spiboot2.text")))
|
|
static void __uses_spiboot2 spi_reset(void)
|
|
{
|
|
spi_write(0xfe, CR1);
|
|
|
|
spi_write(0, SPIDMCOR);
|
|
spi_write(0x00, CR1);
|
|
|
|
spi_write(spi_read(CR2) | SPI_RSTF, CR2); /* fifo reset */
|
|
spi_write(spi_read(CR2) & ~SPI_RSTF, CR2);
|
|
}
|
|
|
|
static void __uses_spiboot2 spi_read_flash(void *buf, unsigned long addr,
|
|
unsigned long len)
|
|
{
|
|
spi_write(M25_READ, TBR);
|
|
spi_write((addr >> 16) & 0xFF, TBR);
|
|
spi_write((addr >> 8) & 0xFF, TBR);
|
|
spi_write(addr & 0xFF, TBR);
|
|
|
|
spi_write(SPIDMINTSR_DMEND, SPIDMINTSR);
|
|
spi_write((unsigned long)buf, SPIWDMADR);
|
|
spi_write(len & 0xFFFFFFE0, SPIWDMCNTR);
|
|
spi_write(1, SPIDMCOR);
|
|
|
|
spi_write(0xff, CR3);
|
|
spi_write(spi_read(CR1) | SPI_SSDB, CR1);
|
|
spi_write(spi_read(CR1) | SPI_SSA, CR1);
|
|
|
|
while (!(spi_read(SPIDMINTSR) & SPIDMINTSR_DMEND))
|
|
;
|
|
}
|
|
|
|
void __uses_spiboot2 spiboot_main(void)
|
|
{
|
|
void (*_start)(void) = (void *)CONFIG_SYS_TEXT_BASE;
|
|
|
|
spi_reset();
|
|
spi_read_flash((void *)CONFIG_RAM_BOOT_PHYS, CONFIG_SPI_ADDR,
|
|
CONFIG_SPI_LENGTH);
|
|
|
|
_start();
|
|
}
|