ARM: at91: xload-mmc: add sama5d3_atmci_start_image() helper

This helper should be called from the xloader

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.barebox.org/20210423142829.29468-3-o.rempel@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 55 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 810c00d495..28a82c1a93 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -45,6 +45,7 @@ config HAVE_AT91_DDRAMC
 
 config AT91_MCI_PBL
 	bool
+	depends on MCI_ATMEL_PBL
 	depends on MCI_ATMEL_SDHCI_PBL
 	default y
 
@@ -610,6 +611,7 @@ config MACH_MICROCHIP_KSZ9477_EVB
 	bool "Microchip EVB-KSZ9477 Evaluation Kit"
 	select SOC_SAMA5D3
 	select OFDEVICE
+	select MCI_ATMEL_PBL
 	select COMMON_CLK_OF_PROVIDER
 	help
 	  Select this if you are using Microchip's EVB-KSZ9477 Evaluation Kit.
diff --git a/arch/arm/mach-at91/include/mach/xload.h b/arch/arm/mach-at91/include/mach/xload.h
index 9201e7d0b7..bbc70af210 100644
--- a/arch/arm/mach-at91/include/mach/xload.h
+++ b/arch/arm/mach-at91/include/mach/xload.h
@@ -5,6 +5,8 @@
 #include <pbl.h>
 
 void __noreturn sama5d2_sdhci_start_image(u32 r4);
+void __noreturn sama5d3_atmci_start_image(u32 r4, unsigned int clock,
+					  unsigned int slot);
 
 int at91_sdhci_bio_init(struct pbl_bio *bio, void __iomem *base);
 int at91_mci_bio_init(struct pbl_bio *bio, void __iomem *base,
diff --git a/arch/arm/mach-at91/xload-mmc.c b/arch/arm/mach-at91/xload-mmc.c
index e9edeccb7f..8d4f653d1e 100644
--- a/arch/arm/mach-at91/xload-mmc.c
+++ b/arch/arm/mach-at91/xload-mmc.c
@@ -3,6 +3,7 @@
 #include <mach/sama5_bootsource.h>
 #include <mach/hardware.h>
 #include <mach/sama5d2_ll.h>
+#include <mach/sama5d3_ll.h>
 #include <mach/gpio.h>
 #include <linux/sizes.h>
 #include <asm/cache.h>
@@ -82,3 +83,53 @@ void __noreturn sama5d2_sdhci_start_image(u32 r4)
 out_panic:
 	panic("FAT chainloading failed\n");
 }
+
+static const struct atmci_instance {
+	void __iomem *base;
+	unsigned id;
+	u8 periph;
+	s8 pins[15];
+} sama5d3_atmci_instances[] = {
+	[0] = {
+		.base = IOMEM(SAMA5D3_BASE_HSMCI0),
+		.id = SAMA5D3_ID_HSMCI0,
+		.periph = AT91_MUX_PERIPH_A,
+		.pins = {
+			AT91_PIN_PD0, AT91_PIN_PD1, AT91_PIN_PD2, AT91_PIN_PD3,
+			AT91_PIN_PD4, AT91_PIN_PD5, AT91_PIN_PD6, AT91_PIN_PD7,
+			AT91_PIN_PD8, AT91_PIN_PD9, -1 }
+	},
+};
+
+void __noreturn sama5d3_atmci_start_image(u32 boot_src, unsigned int clock,
+					  unsigned int slot)
+{
+	void *buf = (void *)SAMA5_DDRCS;
+	const struct atmci_instance *instance;
+	struct pbl_bio bio;
+	const s8 *pin;
+	int ret;
+
+	ret = sama5_bootsource_instance(boot_src);
+	if (ret > ARRAY_SIZE(sama5d3_atmci_instances) - 1)
+		panic("Couldn't determine boot MCI instance\n");
+
+	instance = &sama5d3_atmci_instances[boot_src];
+
+	sama5d3_pmc_enable_periph_clock(SAMA5D2_ID_PIOD);
+	for (pin = instance->pins; *pin >= 0; pin++) {
+		at91_mux_pio3_pin(IOMEM(SAMA5D3_BASE_PIOD),
+					 pin_to_mask(*pin), instance->periph, 0);
+	}
+
+	sama5d3_pmc_enable_periph_clock(instance->id);
+
+	ret = at91_mci_bio_init(&bio, instance->base, clock, slot);
+	if (ret)
+		goto out_panic;
+
+	at91_fat_start_image(&bio, buf, SZ_16M, boot_src);
+
+out_panic:
+	panic("FAT chainloading failed\n");
+}