[PATCH 18/19] mci: imx-esdhc-pbl: implement esdhc xload for ls1028a

[Sascha Hauer]

This implements esdhc xload support for LS1028a. Unlike LS1046a we use
TF-A rather than obsoleted PPA for EL3, so this code also starts the
TF-A.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 drivers/mci/imx-esdhc-pbl.c          | 55 +++++++++++++++++++++++++++-
 firmware/Kconfig                     |  3 ++
 firmware/Makefile                    |  1 +
 include/mach/layerscape/layerscape.h | 12 ++++++
 include/mach/layerscape/xload.h      |  4 ++
 5 files changed, 74 insertions(+), 1 deletion(-)

diff --git a/drivers/mci/imx-esdhc-pbl.c b/drivers/mci/imx-esdhc-pbl.c
index c13830d726..2c74d101e4 100644
--- a/drivers/mci/imx-esdhc-pbl.c
+++ b/drivers/mci/imx-esdhc-pbl.c
@@ -9,6 +9,8 @@
 #include <asm/sections.h>
 #include <asm/cache.h>
 #include <mach/imx/xload.h>
+#include <firmware.h>
+#include <asm/atf_common.h>
 #ifdef CONFIG_ARCH_IMX
 #include <mach/imx/atf.h>
 #include <mach/imx/imx6-regs.h>
@@ -319,7 +321,8 @@ static int layerscape_esdhc_load_image(struct fsl_esdhc_host *host, void *adr, u
 	val |= div_val;
 	sdhci_write32(&host->sdhci, SDHCI_CLOCK_CONTROL__TIMEOUT_CONTROL__SOFTWARE_RESET, val);
 
-	sdhci_write32(&host->sdhci, ESDHC_DMA_SYSCTL, ESDHC_SYSCTL_DMA_SNOOP);
+	sdhci_write32(&host->sdhci, ESDHC_DMA_SYSCTL,
+		      ESDHC_SYSCTL_DMA_SNOOP | ESDHC_SYSCTL_PERIPHERAL_CLK_SEL);
 
 	ret = esdhc_read_blocks(host, adr, size);
 	if (ret) {
@@ -373,4 +376,54 @@ int ls1046a_esdhc_start_image(unsigned long r0, unsigned long r1, unsigned long
 
 	return -EINVAL;
 }
+
+static int ls1028a_esdhc_start_image(void __iomem *base, struct dram_regions_info *dram_info)
+{
+	struct esdhc_soc_data data = {
+		.flags = ESDHC_FLAG_MULTIBLK_NO_INT,
+	};
+	struct fsl_esdhc_host host = {
+		.sdhci.base = base,
+		.socdata = &data,
+	};
+	void *sdram = (void *)0x80000000;
+	void (*bl31)(void) = (void *)0xfbe00000;
+	size_t bl31_size;
+	void *bl31_image;
+	struct bl2_to_bl31_params_mem_v2 *params;
+	unsigned long size = ALIGN(barebox_image_size + LS1046A_SD_IMAGE_OFFSET, 512);
+	void (*barebox)(unsigned long, unsigned long, unsigned long) =
+		(sdram + LS1046A_SD_IMAGE_OFFSET);
+	int ret;
+
+	ret = layerscape_esdhc_load_image(&host, sdram, size, 8 << 4);
+	if (ret)
+		return ret;
+
+	get_builtin_firmware_ext(ls1028a_bl31_bin, barebox, &bl31_image, &bl31_size);
+	memcpy(bl31, bl31_image, bl31_size);
+
+	/* Setup an initial stack for EL2 */
+	asm volatile("msr sp_el2, %0" : : "r" ((unsigned long)barebox - 16) : "cc");
+
+	params = bl2_plat_get_bl31_params_v2(0, (uintptr_t)barebox, 0);
+	params->bl31_ep_info.args.arg3 = (unsigned long)dram_info;
+
+	printf("Starting bl31\n");
+
+	bl31_entry_v2((uintptr_t)bl31, &params->bl_params, NULL);
+
+	return -EINVAL;
+}
+
+int ls1028a_esdhc1_start_image(struct dram_regions_info *dram_info)
+{
+	return ls1028a_esdhc_start_image(IOMEM(0x2140000), dram_info);
+}
+
+int ls1028a_esdhc2_start_image(struct dram_regions_info *dram_info)
+{
+	return ls1028a_esdhc_start_image(IOMEM(0x2150000), dram_info);
+}
+
 #endif
diff --git a/firmware/Kconfig b/firmware/Kconfig
index 38fbf85555..2785c4aabe 100644
--- a/firmware/Kconfig
+++ b/firmware/Kconfig
@@ -58,4 +58,7 @@ config FIRMWARE_CCBV2_OPTEE
 	depends on MACH_WEBASTO_CCBV2 && PBL_OPTEE
 	default y
 
+config FIRMWARE_LS1028A_ATF
+	bool
+
 endmenu
diff --git a/firmware/Makefile b/firmware/Makefile
index 51d98d54bf..9c3ffa4289 100644
--- a/firmware/Makefile
+++ b/firmware/Makefile
@@ -29,6 +29,7 @@ pbl-firmware-$(CONFIG_ARCH_RK3399_OPTEE) += rk3399-op-tee.bin
 firmware-$(CONFIG_DRIVER_NET_FSL_FMAN) += fsl_fman_ucode_ls1046_r1.0_106_4_18.bin
 
 firmware-$(CONFIG_ARCH_LAYERSCAPE_PPA) += ppa-ls1046a.bin
+fw-external-$(CONFIG_FIRMWARE_LS1028A_ATF) += ls1028a-bl31.bin
 
 pbl-firmware-$(CONFIG_FIRMWARE_CCBV2_OPTEE) += ccbv2_optee.bin
 
diff --git a/include/mach/layerscape/layerscape.h b/include/mach/layerscape/layerscape.h
index 95c230b8f3..ceb7b983f6 100644
--- a/include/mach/layerscape/layerscape.h
+++ b/include/mach/layerscape/layerscape.h
@@ -29,4 +29,16 @@ static inline int ls1046a_ppa_init(resource_size_t ppa_start,
 }
 #endif
 
+struct dram_region_info {
+        uint64_t addr;
+        uint64_t size;
+};
+#define NUM_DRAM_REGIONS  3
+
+struct dram_regions_info {
+        uint64_t num_dram_regions;
+        int64_t total_dram_size;
+        struct dram_region_info region[NUM_DRAM_REGIONS];
+};
+
 #endif /* __MACH_LAYERSCAPE_H */
diff --git a/include/mach/layerscape/xload.h b/include/mach/layerscape/xload.h
index 0aeedc2834..86327c63e6 100644
--- a/include/mach/layerscape/xload.h
+++ b/include/mach/layerscape/xload.h
@@ -3,7 +3,11 @@
 #ifndef __MACH_LAYERSCAPE_XLOAD_H
 #define __MACH_LAYERSCAPE_XLOAD_H
 
+struct dram_regions_info;
+
 int ls1046a_esdhc_start_image(unsigned long r0, unsigned long r1, unsigned long r2);
+int ls1028a_esdhc1_start_image(struct dram_regions_info *dram_info);
+int ls1028a_esdhc2_start_image(struct dram_regions_info *dram_info);
 int ls1046a_qspi_start_image(unsigned long r0, unsigned long r1,
 					     unsigned long r2);
 int ls1021a_qspi_start_image(unsigned long r0, unsigned long r1,
-- 
2.39.2