board: arm: Add support for Broadcom BCM7445
Add support for loading U-Boot on the Broadcom 7445 SoC. This port
assumes Broadcom's BOLT bootloader is acting as the second stage
bootloader, and U-Boot is acting as the third stage bootloader, loaded
as an ELF program by BOLT.
Signed-off-by: Thomas Fitzsimmons <fitzsim@fitzsim.org>
Cc: Stefan Roese <sr@denx.de>
Cc: Tom Rini <trini@konsulko.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
diff --git a/board/broadcom/bcmstb/MAINTAINERS b/board/broadcom/bcmstb/MAINTAINERS
new file mode 100644
index 0000000..5851cb9
--- /dev/null
+++ b/board/broadcom/bcmstb/MAINTAINERS
@@ -0,0 +1,7 @@
+BCM7445 BOARD
+M: Thomas Fitzsimmons <fitzsim@fitzsim.org>
+S: Maintained
+F: board/broadcom/bcmstb/
+F: include/configs/bcmstb.h
+F: include/configs/bcm7445.h
+F: configs/bcm7445_defconfig
diff --git a/board/broadcom/bcmstb/Makefile b/board/broadcom/bcmstb/Makefile
new file mode 100644
index 0000000..9609887
--- /dev/null
+++ b/board/broadcom/bcmstb/Makefile
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2018 Cisco Systems, Inc.
+#
+# Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
+#
+
+obj-y := bcmstb.o
diff --git a/board/broadcom/bcmstb/bcmstb.c b/board/broadcom/bcmstb/bcmstb.c
new file mode 100644
index 0000000..25cd354
--- /dev/null
+++ b/board/broadcom/bcmstb/bcmstb.c
@@ -0,0 +1,194 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2018 Cisco Systems, Inc.
+ *
+ * Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
+ */
+
+#include <linux/types.h>
+#include <common.h>
+#include <asm/io.h>
+#include <asm/bootm.h>
+#include <mach/sdhci.h>
+#include <mach/timer.h>
+#include <mmc.h>
+#include <fdtdec.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define BCMSTB_DATA_SECTION __attribute__((section(".data")))
+
+struct bcmstb_boot_parameters bcmstb_boot_parameters BCMSTB_DATA_SECTION;
+
+phys_addr_t prior_stage_fdt_address BCMSTB_DATA_SECTION;
+
+union reg_value_union {
+ const char *data;
+ const phys_addr_t *address;
+};
+
+int board_init(void)
+{
+ return 0;
+}
+
+u32 get_board_rev(void)
+{
+ return 0;
+}
+
+void reset_cpu(ulong ignored)
+{
+}
+
+int print_cpuinfo(void)
+{
+ return 0;
+}
+
+int dram_init(void)
+{
+ if (fdtdec_setup_memory_size() != 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+int dram_init_banksize(void)
+{
+ fdtdec_setup_memory_banksize();
+
+ /*
+ * On this SoC, U-Boot is running as an ELF file. Change the
+ * relocation address to CONFIG_SYS_TEXT_BASE, so that in
+ * setup_reloc, gd->reloc_off works out to 0, effectively
+ * disabling relocation. Otherwise U-Boot hangs in the setup
+ * instructions just before relocate_code in
+ * arch/arm/lib/crt0.S.
+ */
+ gd->relocaddr = CONFIG_SYS_TEXT_BASE;
+
+ return 0;
+}
+
+void enable_caches(void)
+{
+ /*
+ * This port assumes that the prior stage bootloader has
+ * enabled I-cache and D-cache already. Implementing this
+ * function silences the warning in the default function.
+ */
+}
+
+static const phys_addr_t bcmstb_sdhci_address(u32 alias_index)
+{
+ int node = 0;
+ int ret = 0;
+ char sdhci[16] = { 0 };
+ const void *fdt = gd->fdt_blob;
+ const char *path = NULL;
+ struct fdt_resource resource = { 0 };
+
+ if (!fdt) {
+ printf("%s: Invalid gd->fdt_blob\n", __func__);
+ return 0;
+ }
+
+ node = fdt_path_offset(fdt, "/aliases");
+ if (node < 0) {
+ printf("%s: Failed to find /aliases node\n", __func__);
+ return 0;
+ }
+
+ sprintf(sdhci, "sdhci%d", alias_index);
+ path = fdt_getprop(fdt, node, sdhci, NULL);
+ if (!path) {
+ printf("%s: Failed to find alias for %s\n", __func__, sdhci);
+ return 0;
+ }
+
+ node = fdt_path_offset(fdt, path);
+ if (node < 0) {
+ printf("%s: Failed to resolve BCMSTB SDHCI alias\n", __func__);
+ return 0;
+ }
+
+ ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
+ "host", &resource);
+ if (ret) {
+ printf("%s: Failed to read BCMSTB SDHCI host resource\n",
+ __func__);
+ return 0;
+ }
+
+ return resource.start;
+}
+
+int board_mmc_init(bd_t *bis)
+{
+ phys_addr_t sdhci_base_address = 0;
+
+ sdhci_base_address = bcmstb_sdhci_address(CONFIG_BCMSTB_SDHCI_INDEX);
+
+ if (!sdhci_base_address) {
+ sdhci_base_address = BCMSTB_SDHCI_BASE;
+ printf("%s: Assuming BCMSTB SDHCI address: 0x%p\n",
+ __func__, (void *)sdhci_base_address);
+ }
+
+ debug("BCMSTB SDHCI base address: 0x%p\n", (void *)sdhci_base_address);
+
+ bcmstb_sdhci_init(sdhci_base_address);
+
+ return 0;
+}
+
+int timer_init(void)
+{
+ gd->arch.timer_rate_hz = readl(BCMSTB_TIMER_FREQUENCY);
+
+ return 0;
+}
+
+ulong get_tbclk(void)
+{
+ return gd->arch.timer_rate_hz;
+}
+
+uint64_t get_ticks(void)
+{
+ gd->timebase_h = readl(BCMSTB_TIMER_HIGH);
+ gd->timebase_l = readl(BCMSTB_TIMER_LOW);
+
+ return ((uint64_t)gd->timebase_h << 32) | gd->timebase_l;
+}
+
+int board_late_init(void)
+{
+ debug("Arguments from prior stage bootloader:\n");
+ debug("General Purpose Register 0: 0x%x\n", bcmstb_boot_parameters.r0);
+ debug("General Purpose Register 1: 0x%x\n", bcmstb_boot_parameters.r1);
+ debug("General Purpose Register 2: 0x%x\n", bcmstb_boot_parameters.r2);
+ debug("General Purpose Register 3: 0x%x\n", bcmstb_boot_parameters.r3);
+ debug("Stack Pointer Register: 0x%x\n", bcmstb_boot_parameters.sp);
+ debug("Link Register: 0x%x\n", bcmstb_boot_parameters.lr);
+ debug("Assuming timer frequency register at: 0x%p\n",
+ (void *)BCMSTB_TIMER_FREQUENCY);
+ debug("Read timer frequency (in Hz): %ld\n", gd->arch.timer_rate_hz);
+ debug("Prior stage provided DTB at: 0x%p\n",
+ (void *)prior_stage_fdt_address);
+
+ /*
+ * Set fdtcontroladdr in the environment so that scripts can
+ * refer to it, for example, to reuse it for fdtaddr.
+ */
+ env_set_hex("fdtcontroladdr", prior_stage_fdt_address);
+
+ /*
+ * Do not set machid to the machine identifier value provided
+ * by the prior stage bootloader (bcmstb_boot_parameters.r1)
+ * because we're using a device tree to boot Linux.
+ */
+
+ return 0;
+}