arm, at91, spl: add spl support for the taurus board
replaces the at91bootstrap code with SPL code.
make the spl image with:
./tools/mkimage -T atmelimage -d spl/u-boot-spl.bin spl/boot.bin
this writes the length of the spl image into the 6th
execption vector. This is needed from the ROM bootloader.
Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/board/siemens/taurus/taurus.c b/board/siemens/taurus/taurus.c
index 76609c7..b8ff478 100644
--- a/board/siemens/taurus/taurus.c
+++ b/board/siemens/taurus/taurus.c
@@ -21,6 +21,8 @@
#include <asm/arch/at91_rstc.h>
#include <asm/arch/gpio.h>
#include <asm/arch/at91sam9_sdramc.h>
+#include <asm/arch/clk.h>
+#include <linux/mtd/nand.h>
#include <atmel_mci.h>
#include <asm/arch/at91_spi.h>
#include <spi.h>
@@ -30,7 +32,6 @@
DECLARE_GLOBAL_DATA_PTR;
-#ifdef CONFIG_CMD_NAND
static void taurus_nand_hw_init(void)
{
struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
@@ -63,15 +64,77 @@
/* Enable NandFlash */
at91_set_gpio_output(CONFIG_SYS_NAND_ENABLE_PIN, 1);
}
+
+#if defined(CONFIG_SPL_BUILD)
+#include <spl.h>
+#include <nand.h>
+
+void matrix_init(void)
+{
+ struct at91_matrix *mat = (struct at91_matrix *)ATMEL_BASE_MATRIX;
+
+ writel((readl(&mat->scfg[3]) & (~AT91_MATRIX_SLOT_CYCLE))
+ | AT91_MATRIX_SLOT_CYCLE_(0x40),
+ &mat->scfg[3]);
+}
+
+void at91_spl_board_init(void)
+{
+ taurus_nand_hw_init();
+
+ /* Configure recovery button PINs */
+ at91_set_gpio_input(AT91_PIN_PA31, 1);
+
+ /* check if button is pressed */
+ if (at91_get_gpio_value(AT91_PIN_PA31) == 0) {
+ u32 boot_device;
+
+ debug("Recovery button pressed\n");
+ boot_device = spl_boot_device();
+ switch (boot_device) {
+#ifdef CONFIG_SPL_NAND_SUPPORT
+ case BOOT_DEVICE_NAND:
+ nand_init();
+ spl_nand_erase_one(0, 0);
+ break;
+#endif
+ }
+ }
+}
+
+void mem_init(void)
+{
+ struct at91_matrix *ma = (struct at91_matrix *)ATMEL_BASE_MATRIX;
+ struct sdramc_reg setting;
+
+ at91_sdram_hw_init();
+ setting.cr = (AT91_SDRAMC_NC_9 |
+ AT91_SDRAMC_NR_13 |
+ AT91_SDRAMC_CAS_3 |
+ AT91_SDRAMC_NB_4 |
+ AT91_SDRAMC_DBW_32 |
+ AT91_SDRAMC_TWR_VAL(3) |
+ AT91_SDRAMC_TRC_VAL(9) |
+ AT91_SDRAMC_TRP_VAL(3) |
+ AT91_SDRAMC_TRCD_VAL(3) |
+ AT91_SDRAMC_TRAS_VAL(6) |
+ AT91_SDRAMC_TXSR_VAL(10));
+ setting.mdr = AT91_SDRAMC_MD_SDRAM;
+ setting.tr = (CONFIG_SYS_MASTER_CLOCK * 7) / 1000000;
+
+
+ writel(readl(&ma->ebicsa) | AT91_MATRIX_CS1A_SDRAMC |
+ AT91_MATRIX_VDDIOMSEL_3_3V | AT91_MATRIX_EBI_IOSR_SEL,
+ &ma->ebicsa);
+ sdramc_initialize(ATMEL_BASE_CS1, &setting);
+}
#endif
#ifdef CONFIG_MACB
static void taurus_macb_hw_init(void)
{
- struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
/* Enable EMAC clock */
- writel(1 << ATMEL_ID_EMAC0, &pmc->pcer);
+ at91_periph_clk_enable(ATMEL_ID_EMAC0);
/*
* Disable pull-up on:
@@ -119,12 +182,12 @@
int board_early_init_f(void)
{
- struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
/* Enable clocks for all PIOs */
- writel((1 << ATMEL_ID_PIOA) | (1 << ATMEL_ID_PIOB) |
- (1 << ATMEL_ID_PIOC),
- &pmc->pcer);
+ at91_periph_clk_enable(ATMEL_ID_PIOA);
+ at91_periph_clk_enable(ATMEL_ID_PIOB);
+ at91_periph_clk_enable(ATMEL_ID_PIOC);
+
+ at91_seriald_hw_init();
return 0;
}
@@ -149,7 +212,6 @@
/* adress of boot parameters */
gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
- at91_seriald_hw_init();
#ifdef CONFIG_CMD_NAND
taurus_nand_hw_init();
#endif