[U-Boot] [PATCH 1/2] ARM: atmel: switch to main crystal osc for SPL boot

[U-Boot] [PATCH 1/2] ARM: atmel: switch to main crystal osc for SPL boot

[Bo Shen]

If without switch to main crystal oscillator, the sama5d3 SoC will
use internal on chip RC oscillator.
In order to get better accuracy, switch to main crystal oscillator.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
---
 arch/arm/cpu/at91-common/spl.c            | 39 +++++++++++++++++++++++++++++++
 arch/arm/include/asm/arch-at91/at91_pmc.h |  4 ++++
 2 files changed, 43 insertions(+)

diff --git a/arch/arm/cpu/at91-common/spl.c b/arch/arm/cpu/at91-common/spl.c
index 7f4debb..cbb5a52 100644
--- a/arch/arm/cpu/at91-common/spl.c
+++ b/arch/arm/cpu/at91-common/spl.c
@@ -20,6 +20,43 @@ static void at91_disable_wdt(void)
 	writel(AT91_WDT_MR_WDDIS, &wdt->mr);
 }
 
+static void switch_to_main_crystal_osc(void)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+	u32 tmp;
+
+	tmp = readl(&pmc->mor);
+	tmp &= ~AT91_PMC_MOR_OSCOUNT(0xff);
+	tmp &= ~AT91_PMC_MOR_KEY(0xff);
+	tmp |= AT91_PMC_MOR_MOSCEN;
+	tmp |= AT91_PMC_MOR_OSCOUNT(8);
+	tmp |= AT91_PMC_MOR_KEY(0x37);
+	writel(tmp, &pmc->mor);
+	while (!(readl(&pmc->sr) & AT91_PMC_IXR_MOSCS))
+		;
+
+	tmp = readl(&pmc->mor);
+	tmp &= ~AT91_PMC_MOR_OSCBYPASS;
+	tmp &= ~AT91_PMC_MOR_KEY(0xff);
+	tmp |= AT91_PMC_MOR_KEY(0x37);
+	writel(tmp, &pmc->mor);
+
+	tmp = readl(&pmc->mor);
+	tmp |= AT91_PMC_MOR_MOSCSEL;
+	tmp &= ~AT91_PMC_MOR_KEY(0xff);
+	tmp |= AT91_PMC_MOR_KEY(0x37);
+	writel(tmp, &pmc->mor);
+
+	while (!(readl(&pmc->sr) & AT91_PMC_IXR_MOSCSELS))
+		;
+
+	tmp = readl(&pmc->mor);
+	tmp &= ~AT91_PMC_MOR_MOSCRCEN;
+	tmp &= ~AT91_PMC_MOR_KEY(0xff);
+	tmp |= AT91_PMC_MOR_KEY(0x37);
+	writel(tmp, &pmc->mor);
+}
+
 void at91_plla_init(u32 pllar)
 {
 	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
@@ -76,6 +113,8 @@ u32 spl_boot_mode(void)
 
 void s_init(void)
 {
+	switch_to_main_crystal_osc();
+
 	/* disable watchdog */
 	at91_disable_wdt();
 
diff --git a/arch/arm/include/asm/arch-at91/at91_pmc.h b/arch/arm/include/asm/arch-at91/at91_pmc.h
index 4535608..04f6239 100644
--- a/arch/arm/include/asm/arch-at91/at91_pmc.h
+++ b/arch/arm/include/asm/arch-at91/at91_pmc.h
@@ -70,7 +70,10 @@ typedef struct at91_pmc {
 
 #define AT91_PMC_MOR_MOSCEN		0x01
 #define AT91_PMC_MOR_OSCBYPASS		0x02
+#define AT91_PMC_MOR_MOSCRCEN		0x08
 #define AT91_PMC_MOR_OSCOUNT(x)		((x & 0xff) << 8)
+#define AT91_PMC_MOR_KEY(x)		((x & 0xff) << 16)
+#define AT91_PMC_MOR_MOSCSEL		(1 << 24)
 
 #define AT91_PMC_PLLXR_DIV(x)		(x & 0xFF)
 #define AT91_PMC_PLLXR_PLLCOUNT(x)	((x & 0x3F) << 8)
@@ -142,6 +145,7 @@ typedef struct at91_pmc {
 #define AT91_PMC_IXR_PCKRDY1		0x00000200
 #define AT91_PMC_IXR_PCKRDY2		0x00000400
 #define AT91_PMC_IXR_PCKRDY3		0x00000800
+#define AT91_PMC_IXR_MOSCSELS		0x00010000
 
 #define		AT91_PMC_PCK		(1 <<  0)		/* Processor Clock */
 #define		AT91RM9200_PMC_UDP	(1 <<  1)		/* USB Devcice Port Clock [AT91RM9200 only] */
-- 
1.8.5.2

[U-Boot] [PATCH 2/2] ARM: atmel: enable SPL on sama5d3_xplained board

[Bo Shen]

It supports boot from NAND and SD/MMC card.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
---
 board/atmel/sama5d3_xplained/sama5d3_xplained.c | 87 +++++++++++++++++++++++++
 include/configs/sama5d3_xplained.h              | 50 ++++++++++++++
 2 files changed, 137 insertions(+)

diff --git a/board/atmel/sama5d3_xplained/sama5d3_xplained.c b/board/atmel/sama5d3_xplained/sama5d3_xplained.c
index 39f2dc6..92ed4e8 100644
--- a/board/atmel/sama5d3_xplained/sama5d3_xplained.c
+++ b/board/atmel/sama5d3_xplained/sama5d3_xplained.c
@@ -17,6 +17,9 @@
 #include <atmel_mci.h>
 #include <net.h>
 #include <netdev.h>
+#include <spl.h>
+#include <asm/arch/atmel_mpddrc.h>
+#include <asm/arch/at91_wdt.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -128,3 +131,87 @@ int board_mmc_init(bd_t *bis)
 	return 0;
 }
 #endif
+
+/* SPL */
+#ifdef CONFIG_SPL_BUILD
+void spl_board_init(void)
+{
+#ifdef CONFIG_SYS_USE_MMC
+	sama5d3_xplained_mci0_hw_init();
+#elif CONFIG_SYS_USE_NANDFLASH
+	sama5d3_xplained_nand_hw_init();
+#endif
+}
+
+static void ddr2_conf(struct atmel_mpddr *ddr2)
+{
+	ddr2->md = (ATMEL_MPDDRC_MD_DBW_32_BITS | ATMEL_MPDDRC_MD_DDR2_SDRAM);
+
+	ddr2->cr = (ATMEL_MPDDRC_CR_NC_COL_10 |
+		    ATMEL_MPDDRC_CR_NR_ROW_14 |
+		    ATMEL_MPDDRC_CR_CAS_DDR_CAS3 |
+		    ATMEL_MPDDRC_CR_ENRDM_ON |
+		    ATMEL_MPDDRC_CR_NB_8BANKS |
+		    ATMEL_MPDDRC_CR_NDQS_DISABLED |
+		    ATMEL_MPDDRC_CR_DECOD_INTERLEAVED |
+		    ATMEL_MPDDRC_CR_UNAL_SUPPORTED);
+	/*
+	 * As the DDR2-SDRAm device requires a refresh time is 7.8125us
+	 * when DDR run at 133MHz, so it needs (7.8125us * 133MHz / 10^9) clocks
+	 */
+	ddr2->rtr = 0x411;
+
+	ddr2->tpr0 = (6 << ATMEL_MPDDRC_TPR0_TRAS_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TRCD_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TWR_OFFSET |
+		      8 << ATMEL_MPDDRC_TPR0_TRC_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TRP_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TRRD_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TWTR_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR0_TMRD_OFFSET);
+
+	ddr2->tpr1 = (2 << ATMEL_MPDDRC_TPR1_TXP_OFFSET |
+		      200 << ATMEL_MPDDRC_TPR1_TXSRD_OFFSET |
+		      28 << ATMEL_MPDDRC_TPR1_TXSNR_OFFSET |
+		      26 << ATMEL_MPDDRC_TPR1_TRFC_OFFSET);
+
+	ddr2->tpr2 = (7 << ATMEL_MPDDRC_TPR2_TFAW_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR2_TRTP_OFFSET |
+		      2 << ATMEL_MPDDRC_TPR2_TRPA_OFFSET |
+		      7 << ATMEL_MPDDRC_TPR2_TXARDS_OFFSET |
+		      8 << ATMEL_MPDDRC_TPR2_TXARD_OFFSET);
+}
+
+void mem_init(void)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+	struct atmel_mpddr ddr2;
+
+	ddr2_conf(&ddr2);
+
+	/* enable MPDDR clock */
+	at91_periph_clk_enable(ATMEL_ID_MPDDRC);
+	writel(0x4, &pmc->scer);
+
+	/* DDRAM2 Controller initialize */
+	ddr2_init(ATMEL_BASE_DDRCS, &ddr2);
+}
+
+void at91_pmc_init(void)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+	u32 tmp;
+
+	tmp = AT91_PMC_PLLAR_29 |
+	      AT91_PMC_PLLXR_PLLCOUNT(0x3f) |
+	      AT91_PMC_PLLXR_MUL(43) |
+	      AT91_PMC_PLLXR_DIV(1);
+	at91_plla_init(tmp);
+
+	writel(0x3 << 8, &pmc->pllicpr);
+
+	tmp = AT91_PMC_MCKR_MDIV_4 |
+	      AT91_PMC_MCKR_CSS_PLLA;
+	at91_mck_init(tmp);
+}
+#endif
diff --git a/include/configs/sama5d3_xplained.h b/include/configs/sama5d3_xplained.h
index 91cc7d8..1f7d727 100644
--- a/include/configs/sama5d3_xplained.h
+++ b/include/configs/sama5d3_xplained.h
@@ -21,7 +21,11 @@
 
 #define CONFIG_AT91FAMILY
 #define CONFIG_ARCH_CPU_INIT
+
+#ifndef CONFIG_SPL_BUILD
 #define CONFIG_SKIP_LOWLEVEL_INIT
+#endif
+
 #define CONFIG_BOARD_EARLY_INIT_F
 #define CONFIG_DISPLAY_CPUINFO
 
@@ -75,8 +79,12 @@
 #define CONFIG_SYS_SDRAM_BASE           ATMEL_BASE_DDRCS
 #define CONFIG_SYS_SDRAM_SIZE		0x10000000
 
+#ifdef CONFIG_SPL_BUILD
+#define CONFIG_SYS_INIT_SP_ADDR		0x310000
+#else
 #define CONFIG_SYS_INIT_SP_ADDR \
 	(CONFIG_SYS_SDRAM_BASE + 4 * 1024 - GENERATED_GBL_DATA_SIZE)
+#endif
 
 /* NAND flash */
 #define CONFIG_CMD_NAND
@@ -200,4 +208,46 @@
 /* Size of malloc() pool */
 #define CONFIG_SYS_MALLOC_LEN		(4 * 1024 * 1024)
 
+/* SPL */
+#define CONFIG_SPL
+#define CONFIG_SPL_FRAMEWORK
+#define CONFIG_SPL_TEXT_BASE		0x300000
+#define CONFIG_SPL_MAX_SIZE		0x10000
+#define CONFIG_SPL_BSS_START_ADDR	0x20000000
+#define CONFIG_SPL_BSS_MAX_SIZE		0x80000
+#define CONFIG_SYS_SPL_MALLOC_START	0x20080000
+#define CONFIG_SYS_SPL_MALLOC_SIZE	0x80000
+
+#define CONFIG_SPL_LIBCOMMON_SUPPORT
+#define CONFIG_SPL_LIBGENERIC_SUPPORT
+#define CONFIG_SPL_GPIO_SUPPORT
+#define CONFIG_SPL_SERIAL_SUPPORT
+
+#define CONFIG_SPL_BOARD_INIT
+#define CONFIG_SYS_MONITOR_LEN		(512 << 10)
+
+#ifdef CONFIG_SYS_USE_MMC
+#define CONFIG_SPL_LDSCRIPT		arch/arm/cpu/at91-common/u-boot-spl.lds
+#define CONFIG_SPL_MMC_SUPPORT
+#define CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS	0x400
+#define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR 0x200
+#define CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION	1
+#define CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME	"u-boot.img"
+#define CONFIG_SPL_FAT_SUPPORT
+#define CONFIG_SPL_LIBDISK_SUPPORT
+
+#elif CONFIG_SYS_USE_NANDFLASH
+#define CONFIG_SPL_NAND_SUPPORT
+#define CONFIG_SPL_NAND_DRIVERS
+#define CONFIG_SPL_NAND_BASE
+#define CONFIG_SYS_NAND_U_BOOT_OFFS	0x40000
+#define CONFIG_SYS_NAND_5_ADDR_CYCLE
+#define CONFIG_SYS_NAND_PAGE_SIZE	0x800
+#define CONFIG_SYS_NAND_PAGE_COUNT	64
+#define CONFIG_SYS_NAND_OOBSIZE		64
+#define CONFIG_SYS_NAND_BLOCK_SIZE	0x20000
+#define CONFIG_SYS_NAND_BAD_BLOCK_POS	0x0
+
+#endif
+
 #endif
-- 
1.8.5.2

[U-Boot] [U-Boot,2/2] ARM: atmel: enable SPL on sama5d3_xplained board

[Andreas Bießmann]

Dear Bo Shen,

Bo Shen <voice.shen@atmel.com> writes:
>It supports boot from NAND and SD/MMC card.
>
>Signed-off-by: Bo Shen <voice.shen@atmel.com>
>
>---
>board/atmel/sama5d3_xplained/sama5d3_xplained.c | 87 +++++++++++++++++++++++++
> include/configs/sama5d3_xplained.h              | 50 ++++++++++++++
> 2 files changed, 137 insertions(+)

applied to u-boot-atmel/master, thanks!

Best regards,
Andreas Bie?mann

[U-Boot] [U-Boot,1/2] ARM: atmel: switch to main crystal osc for SPL boot

[Andreas Bießmann]

Dear Bo Shen,

Bo Shen <voice.shen@atmel.com> writes:
>If without switch to main crystal oscillator, the sama5d3 SoC will
>use internal on chip RC oscillator.
>In order to get better accuracy, switch to main crystal oscillator.
>
>Signed-off-by: Bo Shen <voice.shen@atmel.com>
>
>---
>arch/arm/cpu/at91-common/spl.c            | 39 +++++++++++++++++++++++++++++++
> arch/arm/include/asm/arch-at91/at91_pmc.h |  4 ++++
> 2 files changed, 43 insertions(+)

applied to u-boot-atmel/master, thanks!

Best regards,
Andreas Bie?mann