[PATCH v1 6/6] ARM: at91: sama5d3: add multiimage support for the microchip-ksz9477-evb
Oleksij Rempel
o.rempel at pengutronix.de
Fri Apr 9 14:11:49 BST 2021
Rework the lowlevel init code to make it multiimage capable. With this
patch we can build first and second stage in one run.
Signed-off-by: Oleksij Rempel <o.rempel at pengutronix.de>
---
.../boards/microchip-ksz9477-evb/lowlevel.c | 33 ++++---
.../include/mach/sama5d3-xplained-ddramc.h | 88 +++++++++++++++++++
images/Makefile.at91 | 5 ++
3 files changed, 114 insertions(+), 12 deletions(-)
create mode 100644 arch/arm/mach-at91/include/mach/sama5d3-xplained-ddramc.h
diff --git a/arch/arm/boards/microchip-ksz9477-evb/lowlevel.c b/arch/arm/boards/microchip-ksz9477-evb/lowlevel.c
index 30a5760da6..93ae481975 100644
--- a/arch/arm/boards/microchip-ksz9477-evb/lowlevel.c
+++ b/arch/arm/boards/microchip-ksz9477-evb/lowlevel.c
@@ -8,20 +8,16 @@
#include <init.h>
#include <asm/barebox-arm-head.h>
-#include <asm/barebox-arm.h>
-#include <mach/at91_pmc_ll.h>
-
-#include <mach/hardware.h>
-#include <mach/iomux.h>
#include <debug_ll.h>
-#include <mach/at91_dbgu.h>
+#include <mach/barebox-arm.h>
+#include <mach/iomux.h>
+#include <mach/sama5d3.h>
+#include <mach/sama5d3-xplained-ddramc.h>
+#include <mach/xload.h>
/* PCK = 528MHz, MCK = 132MHz */
#define MASTER_CLOCK 132000000
-#define sama5d3_pmc_enable_periph_clock(clk) \
- at91_pmc_enable_periph_clock(IOMEM(SAMA5D3_BASE_PMC), clk)
-
static void dbgu_init(void)
{
void __iomem *pio = IOMEM(SAMA5D3_BASE_PIOB);
@@ -36,14 +32,27 @@ static void dbgu_init(void)
putc_ll('>');
}
+SAMA5_ENTRY_FUNCTION(start_sama5d3_xplained_ung8071_xload_mmc, r4)
+{
+ sama5d3_lowlevel_init();
+
+ relocate_to_current_adr();
+ setup_c();
+
+ sama5d3_udelay_init(MASTER_CLOCK);
+ sama5d3_xplained_ddrconf();
+ if (IS_ENABLED(CONFIG_DEBUG_LL))
+ dbgu_init();
+
+ sama5d3_atmci_start_image(0, MASTER_CLOCK, 0);
+}
+
extern char __dtb_z_at91_microchip_ksz9477_evb_start[];
-ENTRY_FUNCTION(start_sama5d3_xplained_ung8071, r0, r1, r2)
+SAMA5_ENTRY_FUNCTION(start_sama5d3_xplained_ung8071, r4)
{
void *fdt;
- arm_cpu_lowlevel_init();
-
arm_setup_stack(SAMA5D3_SRAM_BASE + SAMA5D3_SRAM_SIZE);
if (IS_ENABLED(CONFIG_DEBUG_LL))
diff --git a/arch/arm/mach-at91/include/mach/sama5d3-xplained-ddramc.h b/arch/arm/mach-at91/include/mach/sama5d3-xplained-ddramc.h
new file mode 100644
index 0000000000..6f829282c6
--- /dev/null
+++ b/arch/arm/mach-at91/include/mach/sama5d3-xplained-ddramc.h
@@ -0,0 +1,88 @@
+/* SPDX-License-Identifier: BSD-1-Clause
+ *
+ * Copyright (C) 2014, Atmel Corporation
+ *
+ * SAMA5D27 System-in-Package DDRAMC configuration
+ */
+
+#include <mach/at91_ddrsdrc.h>
+#include <mach/ddramc.h>
+#include <mach/sama5d3_ll.h>
+
+static inline void sama5d3_xplained_ddrconf(void)
+{
+ const struct at91_ddramc_register conf = {
+ .mdr = AT91_DDRC2_DBW_32_BITS | AT91_DDRC2_MD_DDR2_SDRAM,
+
+ .cr = AT91_DDRC2_NC_DDR10_SDR9
+ | AT91_DDRC2_NR_13
+ | AT91_DDRC2_CAS_3
+ | AT91_DDRC2_DISABLE_RESET_DLL
+ | AT91_DDRC2_ENABLE_DLL
+ | AT91_DDRC2_ENRDM_ENABLE
+ | AT91_DDRC2_NB_BANKS_8
+ | AT91_DDRC2_NDQS_DISABLED
+ | AT91_DDRC2_DECOD_INTERLEAVED
+ | AT91_DDRC2_UNAL_SUPPORTED,
+
+ /*
+ * The DDR2-SDRAM device requires a refresh every 15.625 us or 7.81 us.
+ * With a 133 MHz frequency, the refresh timer count register must to be
+ * set with (15.625 x 133 MHz) ~ 2084 i.e. 0x824
+ * or (7.81 x 133 MHz) ~ 1039 i.e. 0x40F.
+ */
+ .rtr = 0x40F, /* Refresh timer: 7.812us */
+
+ /* One clock cycle @ 133 MHz = 7.5 ns */
+ .t0pr = AT91_DDRC2_TRAS_(6) /* 6 * 7.5 = 45 ns */
+ | AT91_DDRC2_TRCD_(2) /* 2 * 7.5 = 22.5 ns */
+ | AT91_DDRC2_TWR_(2) /* 2 * 7.5 = 15 ns */
+ | AT91_DDRC2_TRC_(8) /* 8 * 7.5 = 75 ns */
+ | AT91_DDRC2_TRP_(2) /* 2 * 7.5 = 15 ns */
+ | AT91_DDRC2_TRRD_(2) /* 2 * 7.5 = 15 ns */
+ | AT91_DDRC2_TWTR_(2) /* 2 clock cycles min */
+ | AT91_DDRC2_TMRD_(2), /* 2 clock cycles */
+
+ .t1pr = AT91_DDRC2_TXP_(2) /* 2 clock cycles */
+ | AT91_DDRC2_TXSRD_(200) /* 200 clock cycles */
+ | AT91_DDRC2_TXSNR_(19) /* 19 * 7.5 = 142.5 ns */
+ | AT91_DDRC2_TRFC_(17), /* 17 * 7.5 = 127.5 ns */
+
+ .t2pr = AT91_DDRC2_TFAW_(6) /* 6 * 7.5 = 45 ns */
+ | AT91_DDRC2_TRTP_(2) /* 2 clock cycles min */
+ | AT91_DDRC2_TRPA_(2) /* 2 * 7.5 = 15 ns */
+ | AT91_DDRC2_TXARDS_(8) /* = TXARD */
+ | AT91_DDRC2_TXARD_(8), /* MR12 = 1 */
+ };
+ u32 reg;
+
+ /* enable ddr2 clock */
+ sama5d3_pmc_enable_periph_clock(SAMA5D3_ID_MPDDRC);
+ at91_pmc_enable_system_clock(IOMEM(SAMA5D3_BASE_PMC), AT91CAP9_PMC_DDR);
+
+
+ /* Init the special register for sama5d3x */
+ /* MPDDRC DLL Slave Offset Register: DDR2 configuration */
+ reg = AT91_MPDDRC_S0OFF_1
+ | AT91_MPDDRC_S2OFF_1
+ | AT91_MPDDRC_S3OFF_1;
+ writel(reg, SAMA5D3_BASE_MPDDRC + AT91_MPDDRC_DLL_SOR);
+
+ /* MPDDRC DLL Master Offset Register */
+ /* write master + clk90 offset */
+ reg = AT91_MPDDRC_MOFF_7
+ | AT91_MPDDRC_CLK90OFF_31
+ | AT91_MPDDRC_SELOFF_ENABLED | AT91_MPDDRC_KEY;
+ writel(reg, SAMA5D3_BASE_MPDDRC + AT91_MPDDRC_DLL_MOR);
+
+ /* MPDDRC I/O Calibration Register */
+ /* DDR2 RZQ = 50 Ohm */
+ /* TZQIO = 4 */
+ reg = AT91_MPDDRC_RDIV_DDR2_RZQ_50
+ | AT91_MPDDRC_TZQIO_4;
+ writel(reg, SAMA5D3_BASE_MPDDRC + AT91_MPDDRC_IO_CALIBR);
+
+ /* DDRAM2 Controller initialize */
+ at91_ddram_initialize(IOMEM(SAMA5D3_BASE_MPDDRC), IOMEM(SAMA5_DDRCS),
+ &conf);
+}
diff --git a/images/Makefile.at91 b/images/Makefile.at91
index 00fa4cab27..7c32049270 100644
--- a/images/Makefile.at91
+++ b/images/Makefile.at91
@@ -14,6 +14,11 @@ pblb-$(CONFIG_MACH_MICROCHIP_KSZ9477_EVB) += start_sama5d3_xplained_ung8071
FILE_barebox-microchip-ksz9477-evb.img = start_sama5d3_xplained_ung8071.pblb
image-$(CONFIG_MACH_MICROCHIP_KSZ9477_EVB) += barebox-microchip-ksz9477-evb.img
+pblb-$(CONFIG_MACH_MICROCHIP_KSZ9477_EVB) += start_sama5d3_xplained_ung8071_xload_mmc
+MAX_PBL_IMAGE_SIZE_start_sama5d3_xplained_ung8071_xload_mmc = 0xffff
+FILE_barebox-microchip-ksz9477-evb-xload-mmc.img = start_sama5d3_xplained_ung8071_xload_mmc.pblb
+image-$(CONFIG_MACH_MICROCHIP_KSZ9477_EVB) += barebox-microchip-ksz9477-evb-xload-mmc.img
+
pblb-$(CONFIG_MACH_SAMA5D27_SOM1) += start_sama5d27_som1_ek
FILE_barebox-sama5d27-som1-ek.img = start_sama5d27_som1_ek.pblb
image-$(CONFIG_MACH_SAMA5D27_SOM1) += barebox-sama5d27-som1-ek.img
--
2.29.2
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