[U-Boot] [v2 PATCH 12/12] arm, spl, at91: add spl support for the corvus board

Heiko Schocher
2014-10-30T08:15:06Z

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>

---

Changes in v2:
- rename function "nand_erase_one" to "spl_nand_erase_one" as
Scott Wood suggested
- add comment from Andreas Biessmann:
rename "MPDDRC_CR_EBISHARE" to "MPDDRC_CR_DQMS_SHARED"

arch/arm/Kconfig | 1 +
board/siemens/corvus/board.c | 109 ++++++++++++++++++++++++++++++++++++++-----
configs/corvus_defconfig | 5 +-
include/configs/corvus.h | 54 +++++++++++++++++++--
4 files changed, 151 insertions(+), 18 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index abe1317..ff2d84c 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -125,6 +125,7 @@ config TARGET_PM9G45
bool "Support pm9g45"

config TARGET_CORVUS
+ select SUPPORT_SPL
bool "Support corvus"

config TARGET_TAURUS
diff --git a/board/siemens/corvus/board.c b/board/siemens/corvus/board.c
index f1e93ef..0a11540 100644
--- a/board/siemens/corvus/board.c
+++ b/board/siemens/corvus/board.c
@@ -31,12 +31,10 @@

DECLARE_GLOBAL_DATA_PTR;

-#ifdef CONFIG_CMD_NAND
static void corvus_nand_hw_init(void)
{
struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
- struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
unsigned long csa;

/* Enable CS3 */
@@ -63,22 +61,111 @@ static void corvus_nand_hw_init(void)
AT91_SMC_MODE_TDF_CYCLE(3),
&smc->cs[3].mode);

- writel(1 << ATMEL_ID_PIOC, &pmc->pcer);
-
- /* Configure RDY/BSY */
- at91_set_gpio_input(CONFIG_SYS_NAND_READY_PIN, 1);
+ at91_periph_clk_enable(ATMEL_ID_PIOC);

/* Enable NandFlash */
at91_set_gpio_output(CONFIG_SYS_NAND_ENABLE_PIN, 1);
}
+
+#if defined(CONFIG_SPL_BUILD)
+#include <spl.h>
+#include <nand.h>
+
+void at91_spl_board_init(void)
+{
+ /*
+ * For on the sam9m10g45ek board, the chip wm9711 stay in the test
+ * mode, so it need do some action to exit mode.
+ */
+ at91_set_gpio_output(AT91_PIN_PD7, 0);
+ at91_set_gpio_output(AT91_PIN_PD8, 0);
+ at91_set_pio_pullup(AT91_PIO_PORTD, 7, 1);
+ at91_set_pio_pullup(AT91_PIO_PORTD, 8, 1);
+ at91_set_pio_pullup(AT91_PIO_PORTA, 12, 1);
+ at91_set_pio_pullup(AT91_PIO_PORTA, 13, 1);
+ at91_set_pio_pullup(AT91_PIO_PORTA, 15, 1);
+
+ corvus_nand_hw_init();
+
+ /* Configure recovery button PINs */
+ at91_set_gpio_input(AT91_PIN_PB7, 1);
+
+ /* check if button is pressed */
+ if (at91_get_gpio_value(AT91_PIN_PB7) == 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
+ }
+ }
+}

-#ifdef CONFIG_CMD_USB
-static void taurus_usb_hw_init(void)
+#include <asm/arch/atmel_mpddrc.h>
+static void ddr2_conf(struct atmel_mpddr *ddr2)
+{
+ ddr2->md = (ATMEL_MPDDRC_MD_DBW_16_BITS | ATMEL_MPDDRC_MD_DDR2_SDRAM);
+
+ ddr2->cr = (ATMEL_MPDDRC_CR_NC_COL_10 |
+ ATMEL_MPDDRC_CR_NR_ROW_14 |
+ ATMEL_MPDDRC_CR_DIC_DS |
+ ATMEL_MPDDRC_CR_DQMS_SHARED |
+ ATMEL_MPDDRC_CR_CAS_DDR_CAS3);
+ ddr2->rtr = 0x24b;
+
+ ddr2->tpr0 = (6 << ATMEL_MPDDRC_TPR0_TRAS_OFFSET |/* 6*7.5 = 45 ns */
+ 2 << ATMEL_MPDDRC_TPR0_TRCD_OFFSET |/* 2*7.5 = 15 ns */
+ 2 << ATMEL_MPDDRC_TPR0_TWR_OFFSET | /* 2*7.5 = 15 ns */
+ 8 << ATMEL_MPDDRC_TPR0_TRC_OFFSET | /* 8*7.5 = 75 ns */
+ 2 << ATMEL_MPDDRC_TPR0_TRP_OFFSET | /* 2*7.5 = 15 ns */
+ 1 << ATMEL_MPDDRC_TPR0_TRRD_OFFSET | /* 1*7.5= 7.5 ns*/
+ 1 << ATMEL_MPDDRC_TPR0_TWTR_OFFSET | /* 1 clk cycle */
+ 2 << ATMEL_MPDDRC_TPR0_TMRD_OFFSET); /* 2 clk cycles */
+
+ ddr2->tpr1 = (2 << ATMEL_MPDDRC_TPR1_TXP_OFFSET | /* 2*7.5 = 15 ns */
+ 200 << ATMEL_MPDDRC_TPR1_TXSRD_OFFSET |
+ 16 << ATMEL_MPDDRC_TPR1_TXSNR_OFFSET |
+ 14 << ATMEL_MPDDRC_TPR1_TRFC_OFFSET);
+
+ ddr2->tpr2 = (1 << ATMEL_MPDDRC_TPR2_TRTP_OFFSET |
+ 0 << ATMEL_MPDDRC_TPR2_TRPA_OFFSET |
+ 7 << ATMEL_MPDDRC_TPR2_TXARDS_OFFSET |
+ 2 << ATMEL_MPDDRC_TPR2_TXARD_OFFSET);
+}
+
+void mem_init(void)
{
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+ struct at91_matrix *mat = (struct at91_matrix *)ATMEL_BASE_MATRIX;
+ struct atmel_mpddr ddr2;
+ unsigned long csa;
+
+ ddr2_conf(&ddr2);

- writel(1 << ATMEL_ID_PIODE, &pmc->pcer);
+ /* enable DDR2 clock */
+ writel(0x4, &pmc->scer);
+
+ /* Chip select 1 is for DDR2/SDRAM */
+ csa = readl(&mat->ebicsa);
+ csa |= AT91_MATRIX_EBI_CS1A_SDRAMC;
+ csa &= ~AT91_MATRIX_EBI_VDDIOMSEL_3_3V;
+ writel(csa, &mat->ebicsa);
+
+ /* DDRAM2 Controller initialize */
+ ddr2_init(ATMEL_BASE_CS6, &ddr2);
+}
+#endif
+
+#ifdef CONFIG_CMD_USB
+static void taurus_usb_hw_init(void)
+{
+ at91_periph_clk_enable(ATMEL_ID_PIODE);

at91_set_gpio_output(AT91_PIN_PD1, 0);
at91_set_gpio_output(AT91_PIN_PD3, 0);
@@ -88,10 +175,8 @@ static void taurus_usb_hw_init(void)
#ifdef CONFIG_MACB
static void corvus_macb_hw_init(void)
{
- struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-
/* Enable clock */
- writel(1 << ATMEL_ID_EMAC, &pmc->pcer);
+ at91_periph_clk_enable(ATMEL_ID_EMAC);

/*
* Disable pull-up on:
diff --git a/configs/corvus_defconfig b/configs/corvus_defconfig
index 3fc8edb..5d60847 100644
--- a/configs/corvus_defconfig
+++ b/configs/corvus_defconfig
@@ -1,3 +1,4 @@
+CONFIG_SPL=y
CONFIG_SYS_EXTRA_OPTIONS="AT91SAM9M10G45,SYS_USE_NANDFLASH"
-CONFIG_ARM=y
-CONFIG_TARGET_CORVUS=y
++S:CONFIG_ARM=y
++S:CONFIG_TARGET_CORVUS=y
diff --git a/include/configs/corvus.h b/include/configs/corvus.h
index eb1584d..5b50c1d 100644
--- a/include/configs/corvus.h
+++ b/include/configs/corvus.h
@@ -19,7 +19,6 @@
#define MACH_TYPE_CORVUS 2066

#define CONFIG_SYS_GENERIC_BOARD
-
/*
* Warning: changing CONFIG_SYS_TEXT_BASE requires
* adapting the initial boot program.
@@ -27,7 +26,7 @@
* hex number here!
*/

-#define CONFIG_SYS_TEXT_BASE 0x73f00000
+#define CONFIG_SYS_TEXT_BASE 0x72000000

#define CONFIG_ATMEL_LEGACY /* required until (g)pio is fixed */

@@ -107,8 +106,6 @@
/* our CLE is AD22 */
#define CONFIG_SYS_NAND_MASK_CLE (1 << 22)
#define CONFIG_SYS_NAND_ENABLE_PIN AT91_PIN_PC14
-#define CONFIG_SYS_NAND_READY_PIN AT91_PIN_PC8
-
#endif

/* Ethernet */
@@ -159,5 +156,54 @@
*/
#define CONFIG_SYS_MALLOC_LEN ROUND(3 * CONFIG_ENV_SIZE + \
128*1024, 0x1000)
+/* Defines for SPL */
+#define CONFIG_SPL_FRAMEWORK
+#define CONFIG_SPL_TEXT_BASE 0x300000
+#define CONFIG_SPL_MAX_SIZE (12 * 1024)
+#define CONFIG_SPL_STACK (16 * 1024)
+
+#define CONFIG_SPL_BSS_START_ADDR CONFIG_SPL_MAX_SIZE
+#define CONFIG_SPL_BSS_MAX_SIZE (2 * 1024)
+
+#define CONFIG_SPL_LIBCOMMON_SUPPORT
+#define CONFIG_SPL_LIBGENERIC_SUPPORT
+#define CONFIG_SPL_SERIAL_SUPPORT
+
+#define CONFIG_SPL_BOARD_INIT
+#define CONFIG_SPL_GPIO_SUPPORT
+#define CONFIG_SYS_NAND_ENABLE_PIN_SPL (2*32 + 14)
+#define CONFIG_SPL_NAND_SUPPORT
+#define CONFIG_SPL_NAND_DRIVERS
+#define CONFIG_SPL_NAND_BASE
+#define CONFIG_SPL_NAND_ECC
+#define CONFIG_SPL_NAND_RAW_ONLY
+#define CONFIG_SPL_NAND_SOFTECC
+#define CONFIG_SYS_NAND_U_BOOT_OFFS 0x20000
+#define CONFIG_SYS_NAND_U_BOOT_SIZE 0x80000
+#define CONFIG_SYS_NAND_U_BOOT_START CONFIG_SYS_TEXT_BASE
+#define CONFIG_SYS_NAND_U_BOOT_DST CONFIG_SYS_TEXT_BASE
+#define CONFIG_SYS_NAND_5_ADDR_CYCLE
+
+#define CONFIG_SYS_NAND_SIZE (256*1024*1024)
+#define CONFIG_SYS_NAND_PAGE_SIZE 2048
+#define CONFIG_SYS_NAND_BLOCK_SIZE (128*1024)
+#define CONFIG_SYS_NAND_PAGE_COUNT (CONFIG_SYS_NAND_BLOCK_SIZE / \
+ CONFIG_SYS_NAND_PAGE_SIZE)
+#define CONFIG_SYS_NAND_BAD_BLOCK_POS NAND_LARGE_BADBLOCK_POS
+#define CONFIG_SYS_NAND_ECCSIZE 256
+#define CONFIG_SYS_NAND_ECCBYTES 3
+#define CONFIG_SYS_NAND_OOBSIZE 64
+#define CONFIG_SYS_NAND_ECCPOS { 40, 41, 42, 43, 44, 45, 46, 47, \
+ 48, 49, 50, 51, 52, 53, 54, 55, \
+ 56, 57, 58, 59, 60, 61, 62, 63, }
+
+#define CONFIG_SPL_ATMEL_SIZE
+#define CONFIG_SYS_MASTER_CLOCK 132096000
+#define AT91_PLL_LOCK_TIMEOUT 1000000
+#define CONFIG_SYS_AT91_PLLA 0x20c73f03
+#define CONFIG_SYS_MCKR 0x1301
+#define CONFIG_SYS_MCKR_CSS 0x1302
+
+#define ATMEL_BASE_MPDDRC ATMEL_BASE_DDRSDRC0

#endif
--
1.8.3.1