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>
lime2-spi
Thomas Fitzsimmons 6 years ago committed by Tom Rini
parent d154ca6003
commit 894c3ad27f
  1. 10
      MAINTAINERS
  2. 12
      arch/arm/Kconfig
  3. 1
      arch/arm/Makefile
  4. 36
      arch/arm/mach-bcmstb/Kconfig
  5. 8
      arch/arm/mach-bcmstb/Makefile
  6. 11
      arch/arm/mach-bcmstb/include/mach/gpio.h
  7. 11
      arch/arm/mach-bcmstb/include/mach/hardware.h
  8. 30
      arch/arm/mach-bcmstb/include/mach/prior_stage.h
  9. 15
      arch/arm/mach-bcmstb/include/mach/sdhci.h
  10. 13
      arch/arm/mach-bcmstb/include/mach/timer.h
  11. 21
      arch/arm/mach-bcmstb/lowlevel_init.S
  12. 7
      board/broadcom/bcmstb/MAINTAINERS
  13. 8
      board/broadcom/bcmstb/Makefile
  14. 194
      board/broadcom/bcmstb/bcmstb.c
  15. 27
      configs/bcm7445_defconfig
  16. 150
      doc/README.bcm7xxx
  17. 11
      drivers/mmc/Kconfig
  18. 1
      drivers/mmc/Makefile
  19. 67
      drivers/mmc/bcmstb_sdhci.c
  20. 7
      drivers/spi/Kconfig
  21. 1
      drivers/spi/Makefile
  22. 439
      drivers/spi/bcmstb_spi.c
  23. 2
      drivers/spi/spi-uclass.c
  24. 7
      dts/Kconfig
  25. 26
      include/configs/bcm7445.h
  26. 183
      include/configs/bcmstb.h
  27. 4
      include/fdtdec.h
  28. 4
      lib/fdtdec.c

@ -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>

@ -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"

@ -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

@ -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

@ -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

@ -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 */

@ -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 */

@ -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 */

@ -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 */

@ -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 */

@ -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)

@ -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

@ -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

@ -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;
}

@ -0,0 +1,27 @@
CONFIG_ARM=y
CONFIG_ARCH_BCMSTB=y
CONFIG_TARGET_BCM7445=y
CONFIG_USE_PRIVATE_LIBGCC=y
CONFIG_OF_CONTROL=y
CONFIG_OF_PRIOR_STAGE=y
CONFIG_DM=y
CONFIG_DM_SPI=y
CONFIG_DM_SPI_FLASH=y
CONFIG_SPI=y
CONFIG_SPI_FLASH=y
CONFIG_ENV_IS_IN_SPI_FLASH=y
CONFIG_BCMSTB_SPI=y
CONFIG_FIT=y
CONFIG_FIT_SIGNATURE=y
CONFIG_RSA=y
CONFIG_BLK=n
CONFIG_SDHCI=y
CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_BCMSTB=y
CONFIG_CONS_INDEX=3
CONFIG_BOOTDELAY=1
CONFIG_SYS_PROMPT="U-Boot>"
CONFIG_HUSH_PARSER=y
CONFIG_SYS_TEXT_BASE=0x80100000
CONFIG_SYS_NS16550_COM3=0xf040ab00
CONFIG_EFI_LOADER=n

@ -0,0 +1,150 @@
Summary
=======
This document describes how to use U-Boot on the Broadcom 7445 SoC, as
a third stage bootloader loaded by Broadcom's BOLT bootloader.
BOLT loads U-Boot as a generic ELF binary. Some U-Boot features such
as networking are not yet available but other important features are,
including:
- ext4 file system traversal
- support for loading FIT images
- advanced scripting
- support for FIT-provided DTBs instead of relying on the
BOLT-provided DTB
A customized version of this port has been used in production. The
same approach may work on other BCM7xxx boards, with some
configuration adjustments and memory layout experimentation.
Build
=====
make bcm7445_defconfig
make
${CROSS_COMPILE}strip u-boot
Run
===
Flash the u-boot binary into board storage, then invoke it from BOLT.
For example:
BOLT> boot -bsu -elf flash0.u-boot1
This port assumes that I-cache and D-cache are already enabled when
U-Boot is entered.
Flattened Image Tree Support
============================
What follows is an example FIT image source file. Build it with:
mkimage -f image.its image.itb
Booting the resulting image.itb was tested on BOLT v1.20, with the
following kernels:
https://github.com/Broadcom/stblinux-3.14
https://github.com/Broadcom/stblinux-4.1
https://github.com/Broadcom/stblinux-4.9
and with a generic ARMv7 root file system.
image.its:
/dts-v1/;
/ {
description = "BCM7445 FIT";
images {
kernel@1 {
description = "Linux kernel";
/*
* This kernel image output format can be
* generated with:
*
* make vmlinux
* ${CROSS_COMPILE}objcopy -O binary -S vmlinux vmlinux.bin
* gzip -9 vmlinux.bin
*
* For stblinux-3.14, the specific Broadcom
* board type should be configured in the
* kernel, for example CONFIG_BCM7445D0=y.
*/
data = /incbin/("<vmlinux.bin.gz>");
type = "kernel";
arch = "arm";
os = "linux";
compression = "gzip";
load = <0x8000>;
entry = <0x8000>;
hash@1 {
algo = "sha256";
};
};
ramdisk@1 {
description = "Initramfs root file system";
data = /incbin/("<initramfs.cpio.gz>");
type = "ramdisk";
arch = "arm";
os = "linux";
compression = "gzip";
/*
* Set the environment variable initrd_high to
* 0xffffffff, and set "load" and "entry" here
* to 0x0 to keep initramfs in-place and to
* accommodate stblinux bmem/CMA reservations.
*/
load = <0x0>;
entry = <0x0>;
hash@1 {
algo = "sha256";
};
};
fdt@1 {
description = "Device tree dumped from BOLT";
/*
* This DTB should be similar to the
* BOLT-generated device tree, after BOLT has
* done its runtime modifications to it. For
* example, it can be dumped from within
* U-Boot (at ${fdtcontroladdr}), after BOLT
* has loaded U-Boot. The result can be added
* to the Linux source tree as a .dts file.
*
* To support modifications to the device tree
* in-place in U-Boot, add to Linux's
* arch/arm/boot/dts/Makefile:
*
* DTC_FLAGS ?= -p 4096
*
* This will leave some padding in the DTB and
* thus reserve room for node additions.
*
* Also, set the environment variable fdt_high
* to 0xffffffff to keep the DTB in-place and
* to accommodate stblinux bmem/CMA
* reservations.
*/
data = /incbin/("<bolt-<version>.dtb");
type = "flat_dt";
arch = "arm";
compression = "none";
hash@1 {
algo = "sha256";
};
};
};
configurations {
default = "conf@bcm7445";
conf@bcm7445 {
description = "BCM7445 configuration";
kernel = "kernel@1";
ramdisk = "ramdisk@1";
fdt = "fdt@1";
};
};
};

@ -379,6 +379,17 @@ config MMC_SDHCI_BCM2835
If unsure, say N.
config MMC_SDHCI_BCMSTB
tristate "SDHCI support for the BCMSTB SD/MMC Controller"
depends on MMC_SDHCI
help
This selects the Broadcom set-top box SD/MMC controller.
If you have a BCMSTB platform with SD or MMC devices,
say Y here.
If unsure, say N.
config MMC_SDHCI_CADENCE
bool "SDHCI support for the Cadence SD/SDIO/eMMC controller"
depends on BLK && DM_MMC

@ -45,6 +45,7 @@ obj-$(CONFIG_STM32_SDMMC2) += stm32_sdmmc2.o
obj-$(CONFIG_MMC_SDHCI) += sdhci.o
obj-$(CONFIG_MMC_SDHCI_ATMEL) += atmel_sdhci.o
obj-$(CONFIG_MMC_SDHCI_BCM2835) += bcm2835_sdhci.o
obj-$(CONFIG_MMC_SDHCI_BCMSTB) += bcmstb_sdhci.o
obj-$(CONFIG_MMC_SDHCI_CADENCE) += sdhci-cadence.o
obj-$(CONFIG_MMC_SDHCI_KONA) += kona_sdhci.o
obj-$(CONFIG_MMC_SDHCI_MSM) += msm_sdhci.o

@ -0,0 +1,67 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2018 Cisco Systems, Inc.
*
* Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
*/
#include <common.h>
#include <mach/sdhci.h>
#include <malloc.h>
#include <sdhci.h>
/*
* The BCMSTB SDHCI has a quirk in that its actual maximum frequency
* capability is 100 MHz. The divisor that is eventually written to
* SDHCI_CLOCK_CONTROL is calculated based on what the MMC device
* reports, and relative to this maximum frequency.
*
* This define used to be set to 52000000 (52 MHz), the desired
* maximum frequency, but that would result in the communication
* actually running at 100 MHz (seemingly without issue), which is
* out-of-spec.
*
* Now, by setting this to 0 (auto-detect), 100 MHz will be read from
* the capabilities register, and the resulting divisor will be
* doubled, meaning that the clock control register will be set to the
* in-spec 52 MHz value.
*/
#define BCMSTB_SDHCI_MAXIMUM_CLOCK_FREQUENCY 0
/*
* When the minimum clock frequency is set to 0 (auto-detect), U-Boot
* sets it to 100 MHz divided by SDHCI_MAX_DIV_SPEC_300, or 48,875 Hz,
* which results in the controller timing out when trying to
* communicate with the MMC device. Hard-code this value to 400000
* (400 kHz) to prevent this.
*/
#define BCMSTB_SDHCI_MINIMUM_CLOCK_FREQUENCY 400000
static char *BCMSTB_SDHCI_NAME = "bcmstb-sdhci";
/*
* This driver has only been tested with eMMC devices; SD devices may
* not work.
*/
int bcmstb_sdhci_init(phys_addr_t regbase)
{
struct sdhci_host *host = NULL;
host = (struct sdhci_host *)malloc(sizeof(struct sdhci_host));
if (!host) {
printf("%s: Failed to allocate memory\n", __func__);
return 1;
}
memset(host, 0, sizeof(*host));
host->name = BCMSTB_SDHCI_NAME;
host->ioaddr = (void *)regbase;
host->quirks = 0;
host->cfg.part_type = PART_TYPE_DOS;
host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
return add_sdhci(host,
BCMSTB_SDHCI_MAXIMUM_CLOCK_FREQUENCY,
BCMSTB_SDHCI_MINIMUM_CLOCK_FREQUENCY);
}

@ -66,6 +66,13 @@ config BCM63XX_SPI
access the SPI NOR flash on platforms embedding these Broadcom
SPI cores.
config BCMSTB_SPI
bool "BCMSTB SPI driver"
help
Enable the Broadcom set-top box SPI driver. This driver can
be used to access the SPI flash on platforms embedding this
Broadcom SPI core.
config CADENCE_QSPI
bool "Cadence QSPI driver"
help

@ -18,6 +18,7 @@ obj-$(CONFIG_ATH79_SPI) += ath79_spi.o
obj-$(CONFIG_ATMEL_SPI) += atmel_spi.o
obj-$(CONFIG_BCM63XX_HSSPI) += bcm63xx_hsspi.o
obj-$(CONFIG_BCM63XX_SPI) += bcm63xx_spi.o
obj-$(CONFIG_BCMSTB_SPI) += bcmstb_spi.o
obj-$(CONFIG_CADENCE_QSPI) += cadence_qspi.o cadence_qspi_apb.o
obj-$(CONFIG_CF_SPI) += cf_spi.o
obj-$(CONFIG_DAVINCI_SPI) += davinci_spi.o

@ -0,0 +1,439 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2018 Cisco Systems, Inc.
*
* Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
*/
#include <asm/io.h>
#include <command.h>
#include <config.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <log.h>
#include <malloc.h>
#include <spi.h>
#include <time.h>
DECLARE_GLOBAL_DATA_PTR;
#define SPBR_MIN 8
#define BITS_PER_WORD 8
#define NUM_TXRAM 32
#define NUM_RXRAM 32
#define NUM_CDRAM 16
/* hif_mspi register structure. */
struct bcmstb_hif_mspi_regs {
u32 spcr0_lsb; /* 0x000 */
u32 spcr0_msb; /* 0x004 */
u32 spcr1_lsb; /* 0x008 */
u32 spcr1_msb; /* 0x00c */
u32 newqp; /* 0x010 */
u32 endqp; /* 0x014 */
u32 spcr2; /* 0x018 */
u32 reserved0; /* 0x01c */
u32 mspi_status; /* 0x020 */
u32 cptqp; /* 0x024 */
u32 spcr3; /* 0x028 */
u32 revision; /* 0x02c */
u32 reserved1[4]; /* 0x030 */
u32 txram[NUM_TXRAM]; /* 0x040 */
u32 rxram[NUM_RXRAM]; /* 0x0c0 */
u32 cdram[NUM_CDRAM]; /* 0x140 */
u32 write_lock; /* 0x180 */
};
/* hif_mspi masks. */
#define HIF_MSPI_SPCR2_CONT_AFTER_CMD_MASK 0x00000080
#define HIF_MSPI_SPCR2_SPE_MASK 0x00000040
#define HIF_MSPI_SPCR2_SPIFIE_MASK 0x00000020
#define HIF_MSPI_WRITE_LOCK_WRITE_LOCK_MASK 0x00000001
/* bspi offsets. */
#define BSPI_MAST_N_BOOT_CTRL 0x008
/* bspi_raf is not used in this driver. */
/* hif_spi_intr2 offsets and masks. */
#define HIF_SPI_INTR2_CPU_CLEAR 0x08
#define HIF_SPI_INTR2_CPU_MASK_SET 0x10
#define HIF_SPI_INTR2_CPU_MASK_CLEAR 0x14
#define HIF_SPI_INTR2_CPU_SET_MSPI_DONE_MASK 0x00000020
/* SPI transfer timeout in milliseconds. */
#define HIF_MSPI_WAIT 10
enum bcmstb_base_type {
HIF_MSPI,
BSPI,
HIF_SPI_INTR2,
CS_REG,
BASE_LAST,
};
struct bcmstb_spi_platdata {
void *base[4];
};
struct bcmstb_spi_priv {
struct bcmstb_hif_mspi_regs *regs;
void *bspi;
void *hif_spi_intr2;
void *cs_reg;
int default_cs;
int curr_cs;
uint tx_slot;
uint rx_slot;
u8 saved_cmd[NUM_CDRAM];
uint saved_cmd_len;
void *saved_din_addr;
};
static int bcmstb_spi_ofdata_to_platdata(struct udevice *bus)
{
struct bcmstb_spi_platdata *plat = dev_get_platdata(bus);
const void *fdt = gd->fdt_blob;
int node = dev_of_offset(bus);
int ret = 0;
int i = 0;
struct fdt_resource resource = { 0 };
char *names[BASE_LAST] = { "hif_mspi", "bspi", "hif_spi_intr2",
"cs_reg" };
const phys_addr_t defaults[BASE_LAST] = { BCMSTB_HIF_MSPI_BASE,
BCMSTB_BSPI_BASE,
BCMSTB_HIF_SPI_INTR2,
BCMSTB_CS_REG };
for (i = 0; i < BASE_LAST; i++) {
plat->base[i] = (void *)defaults[i];
ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
names[i], &resource);
if (ret) {
printf("%s: Assuming BCMSTB SPI %s address 0x0x%p\n",
__func__, names[i], (void *)defaults[i]);
} else {
plat->base[i] = (void *)resource.start;
debug("BCMSTB SPI %s address: 0x0x%p\n",
names[i], (void *)plat->base[i]);
}
}
return 0;
}
static void bcmstb_spi_hw_set_parms(struct bcmstb_spi_priv *priv)
{
writel(SPBR_MIN, &priv->regs->spcr0_lsb);
writel(BITS_PER_WORD << 2 | SPI_MODE_3, &priv->regs->spcr0_msb);
}
static void bcmstb_spi_enable_interrupt(void *base, u32 mask)
{
void *reg = base + HIF_SPI_INTR2_CPU_MASK_CLEAR;
writel(readl(reg) | mask, reg);
readl(reg);
}
static void bcmstb_spi_disable_interrupt(void *base, u32 mask)
{
void *reg = base + HIF_SPI_INTR2_CPU_MASK_SET;
writel(readl(reg) | mask, reg);
readl(reg);
}
static void bcmstb_spi_clear_interrupt(void *base, u32 mask)
{
void *reg = base + HIF_SPI_INTR2_CPU_CLEAR;
writel(readl(reg) | mask, reg);
readl(reg);
}
static int bcmstb_spi_probe(struct udevice *bus)
{
struct bcmstb_spi_platdata *plat = dev_get_platdata(bus);
struct bcmstb_spi_priv *priv = dev_get_priv(bus);
priv->regs = plat->base[HIF_MSPI];
priv->bspi = plat->base[BSPI];
priv->hif_spi_intr2 = plat->base[HIF_SPI_INTR2];
priv->cs_reg = plat->base[CS_REG];
priv->default_cs = 0;
priv->curr_cs = -1;
priv->tx_slot = 0;
priv->rx_slot = 0;
memset(priv->saved_cmd, 0, NUM_CDRAM);
priv->saved_cmd_len = 0;
priv->saved_din_addr = NULL;
debug("spi_xfer: tx regs: 0x%p\n", &priv->regs->txram[0]);
debug("spi_xfer: rx regs: 0x%p\n", &priv->regs->rxram[0]);
/* Disable BSPI. */
writel(1, priv->bspi + BSPI_MAST_N_BOOT_CTRL);
readl(priv->bspi + BSPI_MAST_N_BOOT_CTRL);
/* Set up interrupts. */
bcmstb_spi_disable_interrupt(priv->hif_spi_intr2, 0xffffffff);
bcmstb_spi_clear_interrupt(priv->hif_spi_intr2, 0xffffffff);
bcmstb_spi_enable_interrupt(priv->hif_spi_intr2,
HIF_SPI_INTR2_CPU_SET_MSPI_DONE_MASK);
/* Set up control registers. */
writel(0, &priv->regs->spcr1_lsb);
writel(0, &priv->regs->spcr1_msb);
writel(0, &priv->regs->newqp);
writel(0, &priv->regs->endqp);
writel(HIF_MSPI_SPCR2_SPIFIE_MASK, &priv->regs->spcr2);
writel(0, &priv->regs->spcr3);
bcmstb_spi_hw_set_parms(priv);
return 0;
}
static void bcmstb_spi_submit(struct bcmstb_spi_priv *priv, bool done)
{
debug("WR NEWQP: %d\n", 0);
writel(0, &priv->regs->newqp);
debug("WR ENDQP: %d\n", priv->tx_slot - 1);
writel(priv->tx_slot - 1, &priv->regs->endqp);
if (done) {
debug("WR CDRAM[%d]: %02x\n", priv->tx_slot - 1,
readl(&priv->regs->cdram[priv->tx_slot - 1]) & ~0x80);
writel(readl(&priv->regs->cdram[priv->tx_slot - 1]) & ~0x80,
&priv->regs->cdram[priv->tx_slot - 1]);
}
/* Force chip select first time. */
if (priv->curr_cs != priv->default_cs) {
debug("spi_xfer: switching chip select to %d\n",
priv->default_cs);
writel((readl(priv->cs_reg) & ~0xff) | (1 << priv->default_cs),
priv->cs_reg);
readl(priv->cs_reg);
udelay(10);
priv->curr_cs = priv->default_cs;
}
debug("WR WRITE_LOCK: %02x\n", 1);
writel((readl(&priv->regs->write_lock) &
~HIF_MSPI_WRITE_LOCK_WRITE_LOCK_MASK) | 1,
&priv->regs->write_lock);
readl(&priv->regs->write_lock);
debug("WR SPCR2: %02x\n",
HIF_MSPI_SPCR2_SPIFIE_MASK |
HIF_MSPI_SPCR2_SPE_MASK |
HIF_MSPI_SPCR2_CONT_AFTER_CMD_MASK);
writel(HIF_MSPI_SPCR2_SPIFIE_MASK |
HIF_MSPI_SPCR2_SPE_MASK |
HIF_MSPI_SPCR2_CONT_AFTER_CMD_MASK,
&priv->regs->spcr2);
}
static int bcmstb_spi_wait(struct bcmstb_spi_priv *priv)
{
u32 start_time = get_timer(0);
u32 status = readl(&priv->regs->mspi_status);
while (!(status & 1)) {
if (get_timer(start_time) > HIF_MSPI_WAIT)
return -ETIMEDOUT;
status = readl(&priv->regs->mspi_status);
}
writel(readl(&priv->regs->mspi_status) & ~1, &priv->regs->mspi_status);
bcmstb_spi_clear_interrupt(priv->hif_spi_intr2,
HIF_SPI_INTR2_CPU_SET_MSPI_DONE_MASK);
return 0;
}
static int bcmstb_spi_xfer(struct udevice *dev, unsigned int bitlen,
const void *dout, void *din, unsigned long flags)
{
uint len = bitlen / 8;
uint tx_len = len;
uint rx_len = len;
const u8 *out_bytes = (u8 *)dout;
u8 *in_bytes = (u8 *)din;
struct udevice *bus = dev_get_parent(dev);
struct bcmstb_spi_priv *priv = dev_get_priv(bus);
struct bcmstb_hif_mspi_regs *regs = priv->regs;
debug("spi_xfer: %d, t: 0x%p, r: 0x%p, f: %lx\n",
len, dout, din, flags);
debug("spi_xfer: chip select: %x\n", readl(priv->cs_reg) & 0xff);
debug("spi_xfer: tx addr: 0x%p\n", &regs->txram[0]);
debug("spi_xfer: rx addr: 0x%p\n", &regs->rxram[0]);
debug("spi_xfer: cd addr: 0x%p\n", &regs->cdram[0]);
if (flags & SPI_XFER_END) {
debug("spi_xfer: clearing saved din address: 0x%p\n",
priv->saved_din_addr);
priv->saved_din_addr = NULL;
priv->saved_cmd_len = 0;
memset(priv->saved_cmd, 0, NUM_CDRAM);
}
if (bitlen == 0)
return 0;
if (bitlen % 8) {
printf("%s: Non-byte-aligned transfer\n", __func__);
return -EOPNOTSUPP;
}
if (flags & ~(SPI_XFER_BEGIN | SPI_XFER_END)) {
printf("%s: Unsupported flags: %lx\n", __func__, flags);
return -EOPNOTSUPP;
}
if (flags & SPI_XFER_BEGIN) {
priv->tx_slot = 0;
priv->rx_slot = 0;
if (out_bytes && len > NUM_CDRAM) {
printf("%s: Unable to save transfer\n", __func__);
return -EOPNOTSUPP;
}
if (out_bytes && !(flags & SPI_XFER_END)) {
/*
* This is the start of a transmit operation
* that will need repeating if the calling
* code polls for the result. Save it for
* subsequent transmission.
*/
debug("spi_xfer: saving command: %x, %d\n",
out_bytes[0], len);
priv->saved_cmd_len = len;
memcpy(priv->saved_cmd, out_bytes, priv->saved_cmd_len);
}
}
if (!(flags & (SPI_XFER_BEGIN | SPI_XFER_END))) {
if (priv->saved_din_addr == din) {
/*
* The caller is polling for status. Repeat
* the last transmission.
*/
int ret = 0;
debug("spi_xfer: Making recursive call\n");
ret = bcmstb_spi_xfer(dev, priv->saved_cmd_len * 8,
priv->saved_cmd, NULL,
SPI_XFER_BEGIN);
if (ret) {
printf("%s: Recursive call failed\n", __func__);
return ret;
}
} else {
debug("spi_xfer: saving din address: 0x%p\n", din);
priv->saved_din_addr = din;
}
}
while (rx_len > 0) {
priv->rx_slot = priv->tx_slot;
while (priv->tx_slot < NUM_CDRAM && tx_len > 0) {
bcmstb_spi_hw_set_parms(priv);
debug("WR TXRAM[%d]: %02x\n", priv->tx_slot,
out_bytes ? out_bytes[len - tx_len] : 0xff);
writel(out_bytes ? out_bytes[len - tx_len] : 0xff,
&regs->txram[priv->tx_slot << 1]);
debug("WR CDRAM[%d]: %02x\n", priv->tx_slot, 0x8e);
writel(0x8e, &regs->cdram[priv->tx_slot]);
priv->tx_slot++;
tx_len--;
if (!in_bytes)
rx_len--;
}
debug("spi_xfer: early return clauses: %d, %d, %d\n",
len <= NUM_CDRAM,
!in_bytes,
(flags & (SPI_XFER_BEGIN |
SPI_XFER_END)) == SPI_XFER_BEGIN);
if (len <= NUM_CDRAM &&
!in_bytes &&
(flags & (SPI_XFER_BEGIN | SPI_XFER_END)) == SPI_XFER_BEGIN)
return 0;
bcmstb_spi_submit(priv, tx_len == 0);
if (bcmstb_spi_wait(priv) == -ETIMEDOUT) {
printf("%s: Timed out\n", __func__);
return -ETIMEDOUT;
}
priv->tx_slot %= NUM_CDRAM;
if (in_bytes) {
while (priv->rx_slot < NUM_CDRAM && rx_len > 0) {
in_bytes[len - rx_len] =
readl(&regs->rxram[(priv->rx_slot << 1)
+ 1])
& 0xff;
debug("RD RXRAM[%d]: %02x\n",
priv->rx_slot, in_bytes[len - rx_len]);
priv->rx_slot++;
rx_len--;
}
}
}
if (flags & SPI_XFER_END) {
debug("WR WRITE_LOCK: %02x\n", 0);
writel((readl(&priv->regs->write_lock) &
~HIF_MSPI_WRITE_LOCK_WRITE_LOCK_MASK) | 0,
&priv->regs->write_lock);
readl(&priv->regs->write_lock);
}
return 0;
}
static int bcmstb_spi_set_speed(struct udevice *dev, uint speed)
{
return 0;
}
static int bcmstb_spi_set_mode(struct udevice *dev, uint mode)
{
return 0;
}
static const struct dm_spi_ops bcmstb_spi_ops = {
.xfer = bcmstb_spi_xfer,
.set_speed = bcmstb_spi_set_speed,
.set_mode = bcmstb_spi_set_mode,
};
static const struct udevice_id bcmstb_spi_id[] = {
{ .compatible = "brcm,spi-brcmstb" },
{ }
};
U_BOOT_DRIVER(bcmstb_spi) = {
.name = "bcmstb_spi",
.id = UCLASS_SPI,
.of_match = bcmstb_spi_id,
.ops = &bcmstb_spi_ops,
.ofdata_to_platdata = bcmstb_spi_ofdata_to_platdata,
.probe = bcmstb_spi_probe,
.platdata_auto_alloc_size = sizeof(struct bcmstb_spi_platdata),
.priv_auto_alloc_size = sizeof(struct bcmstb_spi_priv),
};

@ -273,7 +273,7 @@ int spi_get_bus_and_cs(int busnum, int cs, int speed, int mode,
bool created = false;
int ret;
#if CONFIG_IS_ENABLED(OF_PLATDATA)
#if CONFIG_IS_ENABLED(OF_PLATDATA) || CONFIG_IS_ENABLED(OF_PRIOR_STAGE)
ret = uclass_first_device_err(UCLASS_SPI, &bus);
#else
ret = uclass_get_device_by_seq(UCLASS_SPI, busnum, &bus);

@ -101,6 +101,13 @@ config OF_HOSTFILE
This is only useful for Sandbox. Use the -d flag to U-Boot to
specify the file to read.
config OF_PRIOR_STAGE
bool "Prior stage bootloader DTB for DT control"
help
If this option is enabled, the device tree used for DT
control will be read from a device tree binary, at a memory
location passed to U-Boot by the prior stage bootloader.
endchoice
config DEFAULT_DEVICE_TREE

@ -0,0 +1,26 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2018 Cisco Systems, Inc.
*
* Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
*
* Configuration settings for the Broadcom BCM7445 SoC family.
*/
#ifndef __CONFIG_H
#define __CONFIG_H
#include "bcmstb.h"
#define CONFIG_SYS_NS16550_COM3 0xf040ab00
#define BCMSTB_SDHCI_BASE 0xf03e0200
#define BCMSTB_TIMER_LOW 0xf0412008
#define BCMSTB_TIMER_HIGH 0xf041200c
#define BCMSTB_TIMER_FREQUENCY 0xf0412020
#define BCMSTB_HIF_MSPI_BASE 0xf03e3400
#define BCMSTB_BSPI_BASE 0xf03e3200
#define BCMSTB_HIF_SPI_INTR2 0xf03e1a00
#define BCMSTB_CS_REG 0xf03e0920
#endif /* __CONFIG_H */

@ -0,0 +1,183 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2018 Cisco Systems, Inc.
*
* Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
*
* Configuration settings for the Broadcom BCMSTB SoC family.
*/
#ifndef __BCMSTB_H
#define __BCMSTB_H
#include "version.h"
#include <linux/sizes.h>
#include <asm/arch/prior_stage.h>
/*
* Generic board configuration.
*/
#define CONFIG_SYS_GENERIC_BOARD
/*
* CPU configuration.
*/
#define CONFIG_SKIP_LOWLEVEL_INIT
/*
* Memory configuration.
*
* The prior stage BOLT bootloader sets up memory for us.
*
* An example boot memory layout after loading everything is:
*
* 0x0000 8000 vmlinux.bin.gz
* : [~31 MiB uncompressed max]
* 0x01ef f000 FIT containing signed public key
* : [~2 KiB in size]
* 0x01f0 0000 DTB copied from prior-stage-provided region
* : [~1 MiB max]
* 0x0200 0000 FIT containing ramdisk and device tree
* : initramfs.cpio.gz
* : [~208 MiB uncompressed max, to CMA/bmem low address]
* : [~80 MiB compressed max, to PSB low address]
* : device tree binary
* : [~60 KiB]
* 0x0700 0000 Prior stage bootloader (PSB)
* :
* 0x0761 7000 Prior-stage-provided device tree binary (DTB)
* : [~40 KiB in size]
* 0x0f00 0000 Contiguous memory allocator (CMA/bmem) low address
* :
* 0x8010 0000 U-Boot code at ELF load address
* : [~500 KiB in size, stripped]
* 0xc000 0000 Top of RAM
*
* Setting gd->relocaddr to CONFIG_SYS_TEXT_BASE in dram_init_banksize
* prevents U-Boot from relocating itself when it is run as an ELF
* program by the prior stage bootloader.
*
* We want to keep the ramdisk and FDT in the FIT image in-place, to
* accommodate stblinux's bmem and CMA regions. To accomplish this,
* we set initrd_high and fdt_high to 0xffffffff, and the load and
* entry addresses of the FIT ramdisk entry to 0x0.
*
* Overwriting the prior stage bootloader causes memory instability,
* so the compressed initramfs needs to fit between the load address
* and the PSB low address. In BOLT's default configuration this
* limits the compressed size of the initramfs to approximately 80
* MiB. However, BOLT can be configured to allow loading larger
* initramfs images, in which case this limitation is eliminated.
*/
#define CONFIG_NR_DRAM_BANKS 3
#define CONFIG_SYS_SDRAM_BASE 0x00000000
#define CONFIG_SYS_TEXT_BASE 0x80100000
#define CONFIG_SYS_INIT_RAM_ADDR 0x80200000
#define CONFIG_SYS_INIT_RAM_SIZE 0x100000
#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_INIT_RAM_ADDR + \
CONFIG_SYS_INIT_RAM_SIZE - \
GENERATED_GBL_DATA_SIZE)
#define CONFIG_SYS_MALLOC_LEN ((10 * 1024) << 10) /* 10 MiB */
#define CONFIG_SYS_LOAD_ADDR 0x2000000
/*
* CONFIG_SYS_LOAD_ADDR - 1 MiB.
*/
#define CONFIG_SYS_FDT_SAVE_ADDRESS 0x1f00000
#define CONFIG_SYS_CBSIZE 512
#define CONFIG_SYS_MAXARGS 32
/*
* Large kernel image bootm configuration.
*/
#define CONFIG_SYS_BOOTM_LEN SZ_64M
/*
* NS16550 configuration.
*/
#define V_NS16550_CLK 81000000
#define CONFIG_SYS_NS16550
#define CONFIG_SYS_NS16550_SERIAL
#define CONFIG_SYS_NS16550_REG_SIZE (-4)
#define CONFIG_SYS_NS16550_CLK V_NS16550_CLK
/*
* Serial console configuration.
*/
#define CONFIG_SERIAL3 3
#define CONFIG_BAUDRATE 115200
#define CONFIG_SYS_BAUDRATE_TABLE {4800, 9600, 19200, 38400, 57600, \
115200}
/*
* Informational display configuration.
*/
#define CONFIG_REVISION_TAG
/*
* Command configuration.
*/
#define CONFIG_CMD_ASKENV
#define CONFIG_CMD_CACHE
#define CONFIG_CMD_EXT2
#define CONFIG_CMD_SF
#define CONFIG_CMD_SPI
#define CONFIG_CMD_SF_TEST
#define CONFIG_CMD_MMC
/*
* Flash configuration.
*/
#define CONFIG_ST_SMI
#define CONFIG_SPI_FLASH_STMICRO
#define CONFIG_SPI_FLASH_MACRONIX
/*
* Filesystem configuration.
*/
#define CONFIG_DOS_PARTITION
#define CONFIG_CMD_EXT4
#define CONFIG_FS_EXT4
#define CONFIG_CMD_FS_GENERIC
/*
* Environment configuration.
*/
#define CONFIG_SYS_REDUNDAND_ENVIRONMENT
#define CONFIG_ENV_IS_IN_SPI_FLASH 1
#define CONFIG_ENV_OFFSET 0x1e0000
#define CONFIG_ENV_SIZE (64 << 10) /* 64 KiB */
#define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE
#define CONFIG_ENV_OFFSET_REDUND (CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE)
#define CONFIG_ENV_OVERWRITE
/*
* Save the prior stage provided DTB.
*/
#define CONFIG_PREBOOT \
"fdt addr ${fdtcontroladdr};" \
"fdt move ${fdtcontroladdr} ${fdtsaveaddr};" \
"fdt addr ${fdtsaveaddr};"
/*
* Enable in-place RFS with this initrd_high setting.
*/
#define CONFIG_EXTRA_ENV_SETTINGS \
"fdtsaveaddr=" __stringify(CONFIG_SYS_FDT_SAVE_ADDRESS) "\0" \
"initrd_high=0xffffffff\0" \
"fdt_high=0xffffffff\0"
/*
* Set fdtaddr to prior stage-provided DTB in board_late_init, when
* writeable environment is available.
*/
#define CONFIG_BOARD_LATE_INIT
#define CONFIG_SYS_MAX_FLASH_BANKS 1
#define CONFIG_DM_SPI 1
#endif /* __BCMSTB_H */

@ -49,6 +49,10 @@ struct bd_info;
#define SPL_BUILD 0
#endif
#if CONFIG_IS_ENABLED(OF_PRIOR_STAGE)
extern phys_addr_t prior_stage_fdt_address;
#endif
/*
* Information about a resource. start is the first address of the resource
* and end is the last address (inclusive). The length of the resource will

@ -1324,8 +1324,12 @@ int fdtdec_setup(void)
# endif
# ifndef CONFIG_SPL_BUILD
/* Allow the early environment to override the fdt address */
# if CONFIG_IS_ENABLED(OF_PRIOR_STAGE)
gd->fdt_blob = (void *)prior_stage_fdt_address;
# else
gd->fdt_blob = (void *)env_get_ulong("fdtcontroladdr", 16,
(uintptr_t)gd->fdt_blob);
# endif
# endif
# if CONFIG_IS_ENABLED(MULTI_DTB_FIT)

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