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>

MAINTAINERS

@@ -107,6 +107,16 @@ F:	drivers/video/bcm2835.c
 F:	include/dm/platform_data/serial_bcm283x_mu.h
 F:	drivers/pinctrl/broadcom/
 
+ARM BROADCOM BCMSTB
+M:	Thomas Fitzsimmons <fitzsim@fitzsim.org>
+S:	Maintained
+F:	arch/arm/mach-bcmstb/
+F:	board/broadcom/bcmstb/
+F:	configs/bcm7445_defconfig
+F:	doc/README.bcm7xxx
+F:	drivers/mmc/bcmstb_sdhci.c
+F:	drivers/spi/bcmstb_spi.c
+
 ARM FREESCALE IMX
 M:	Stefano Babic <sbabic@denx.de>
 M:	Fabio Estevam <fabio.estevam@nxp.com>

arch/arm/Kconfig

@@ -542,6 +542,16 @@ config TARGET_VEXPRESS_CA15_TC2
 	select CPU_V7_HAS_VIRT
 	select PL011_SERIAL
 
+config ARCH_BCMSTB
+	bool "Broadcom BCM7XXX family"
+	select CPU_V7A
+	select DM
+	select OF_CONTROL
+	select OF_PRIOR_STAGE
+	help
+	  This enables support for Broadcom ARM-based set-top box
+	  chipsets, including the 7445 family of chips.
+
 config TARGET_VEXPRESS_CA5X2
 	bool "Support vexpress_ca5x2"
 	select CPU_V7A
@@ -1326,6 +1336,8 @@ source "arch/arm/mach-at91/Kconfig"
 
 source "arch/arm/mach-bcm283x/Kconfig"
 
+source "arch/arm/mach-bcmstb/Kconfig"
+
 source "arch/arm/mach-davinci/Kconfig"
 
 source "arch/arm/mach-exynos/Kconfig"

arch/arm/Makefile

@@ -54,6 +54,7 @@ PLATFORM_CPPFLAGS += $(arch-y) $(tune-y)
 machine-$(CONFIG_ARCH_ASPEED)		+= aspeed
 machine-$(CONFIG_ARCH_AT91)		+= at91
 machine-$(CONFIG_ARCH_BCM283X)		+= bcm283x
+machine-$(CONFIG_ARCH_BCMSTB)		+= bcmstb
 machine-$(CONFIG_ARCH_DAVINCI)		+= davinci
 machine-$(CONFIG_ARCH_EXYNOS)		+= exynos
 machine-$(CONFIG_ARCH_HIGHBANK)		+= highbank

arch/arm/mach-bcmstb/Kconfig

@@ -0,0 +1,36 @@
+if ARCH_BCMSTB
+
+config TARGET_BCM7445
+	bool "Broadcom 7445 TSBL"
+	depends on ARCH_BCMSTB
+	help
+	  Support for the Broadcom 7445 SoC.  This port assumes BOLT
+	  is acting as the second stage bootloader, and U-Boot is
+	  acting as the third stage bootloader (TSBL), loaded by BOLT.
+	  This port may work on other BCM7xxx boards with
+	  configuration changes.
+
+config SYS_CPU
+	default "armv7"
+
+config SYS_BOARD
+	default "bcmstb"
+
+config SYS_VENDOR
+	default "broadcom"
+
+config SYS_SOC
+	default "bcmstb"
+
+config SYS_CONFIG_NAME
+	default "bcm7445"
+
+config SYS_FDT_SAVE_ADDRESS
+	hex "Address to which the prior stage provided DTB will be copied"
+	default 0x1f00000
+
+config BCMSTB_SDHCI_INDEX
+	int "Index of preferred BCMSTB SDHCI alias in DTB"
+	default 1
+
+endif

arch/arm/mach-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	:= lowlevel_init.o

arch/arm/mach-bcmstb/include/mach/gpio.h

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2018  Cisco Systems, Inc.
+ *
+ * Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
+ */
+
+#ifndef _BCMSTB_GPIO_H
+#define _BCMSTB_GPIO_H
+
+#endif /* _BCMSTB_GPIO_H */

arch/arm/mach-bcmstb/include/mach/hardware.h

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2018  Cisco Systems, Inc.
+ *
+ * Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
+ */
+
+#ifndef _BCMSTB_HARDWARE_H
+#define _BCMSTB_HARDWARE_H
+
+#endif /* _BCMSTB_HARDWARE_H */

arch/arm/mach-bcmstb/include/mach/prior_stage.h

@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2018  Cisco Systems, Inc.
+ *
+ * Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
+ */
+
+#ifndef _BCMSTB_PRIOR_STAGE_H
+#define _BCMSTB_PRIOR_STAGE_H
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+
+struct bcmstb_boot_parameters {
+	u32 r0;
+	u32 r1;
+	u32 r2;
+	u32 r3;
+	u32 sp;
+	u32 lr;
+};
+
+extern struct bcmstb_boot_parameters bcmstb_boot_parameters;
+
+extern phys_addr_t prior_stage_fdt_address;
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _BCMSTB_PRIOR_STAGE_H */

arch/arm/mach-bcmstb/include/mach/sdhci.h

@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2018  Cisco Systems, Inc.
+ *
+ * Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
+ */
+
+#ifndef _BCMSTB_SDHCI_H
+#define _BCMSTB_SDHCI_H
+
+#include <linux/types.h>
+
+int bcmstb_sdhci_init(phys_addr_t regbase);
+
+#endif /* _BCMSTB_SDHCI_H */

arch/arm/mach-bcmstb/include/mach/timer.h

@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2018  Cisco Systems, Inc.
+ *
+ * Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
+ */
+
+#ifndef _BCMSTB_TIMER_H
+#define _BCMSTB_TIMER_H
+
+unsigned long timer_read_counter(void);
+
+#endif /* _BCMSTB_TIMER_H */

arch/arm/mach-bcmstb/lowlevel_init.S

@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2018  Cisco Systems, Inc.
+ *
+ * Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
+ */
+
+#include <linux/linkage.h>
+
+ENTRY(save_boot_params)
+	ldr	r6, =bcmstb_boot_parameters
+	str	r0, [r6, #0]
+	str	r1, [r6, #4]
+	str	r2, [r6, #8]
+	str	r3, [r6, #12]
+	str	sp, [r6, #16]
+	str	lr, [r6, #20]
+	ldr	r6, =prior_stage_fdt_address
+	str	r2, [r6]
+	b	save_boot_params_ret
+ENDPROC(save_boot_params)

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

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