From: Tien Fong Chee tien.fong.chee@intel.com
This patch triggers warm reset to recover the MPFE NoC from corruption due to high frequency transient clock output from HPS EMIF IOPLL at VCO startup after peripheral RBF is programmed.
Signed-off-by: Tien Fong Chee tien.fong.chee@intel.com Signed-off-by: Sin Hui Kho sin.hui.kho@intel.com --- arch/arm/mach-socfpga/include/mach/misc.h | 5 +- .../include/mach/reset_manager_arria10.h | 6 +- .../include/mach/system_manager_arria10.h | 4 + arch/arm/mach-socfpga/misc_arria10.c | 90 ++++++++++++++++- arch/arm/mach-socfpga/spl_a10.c | 96 ++++++++++++++++++- 5 files changed, 195 insertions(+), 6 deletions(-)
diff --git a/arch/arm/mach-socfpga/include/mach/misc.h b/arch/arm/mach-socfpga/include/mach/misc.h index 649d2f6ce2..74e8e2590f 100644 --- a/arch/arm/mach-socfpga/include/mach/misc.h +++ b/arch/arm/mach-socfpga/include/mach/misc.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0 */ /* - * Copyright (C) 2016-2017 Intel Corporation + * Copyright (C) 2016-2021 Intel Corporation */
#ifndef _SOCFPGA_MISC_H_ @@ -45,7 +45,10 @@ int is_fpga_config_ready(void); #endif
void do_bridge_reset(int enable, unsigned int mask); +bool is_regular_boot_valid(void); +void set_regular_boot(unsigned int status); void socfpga_pl310_clear(void); void socfpga_get_managers_addr(void); +int qspi_flash_software_reset(void);
#endif /* _SOCFPGA_MISC_H_ */ diff --git a/arch/arm/mach-socfpga/include/mach/reset_manager_arria10.h b/arch/arm/mach-socfpga/include/mach/reset_manager_arria10.h index 19507c292d..26faa628a0 100644 --- a/arch/arm/mach-socfpga/include/mach/reset_manager_arria10.h +++ b/arch/arm/mach-socfpga/include/mach/reset_manager_arria10.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0 */ /* - * Copyright (C) 2016-2017 Intel Corporation + * Copyright (C) 2016-2021 Intel Corporation */
#ifndef _RESET_MANAGER_ARRIA10_H_ @@ -22,6 +22,7 @@ int socfpga_bridges_reset(void); #define RSTMGR_A10_PER1MODRST 0x28 #define RSTMGR_A10_BRGMODRST 0x2c #define RSTMGR_A10_SYSMODRST 0x30 +#define RSTMGR_A10_SYSWARMMASK 0x50
#define RSTMGR_CTRL RSTMGR_A10_CTRL
@@ -115,4 +116,7 @@ int socfpga_bridges_reset(void); #define ALT_RSTMGR_HDSKEN_FPGAHSEN_SET_MSK BIT(2) #define ALT_RSTMGR_HDSKEN_ETRSTALLEN_SET_MSK BIT(3)
+#define ALT_RSTMGR_FPGAMGRWARMMASK_S2F_SET_MSK BIT(3) +#define ALT_RSTMGR_SYSWARMMASK_S2F_SET_MSK BIT(4) + #endif /* _RESET_MANAGER_ARRIA10_H_ */ diff --git a/arch/arm/mach-socfpga/include/mach/system_manager_arria10.h b/arch/arm/mach-socfpga/include/mach/system_manager_arria10.h index 75e1fcd80f..0afe63e647 100644 --- a/arch/arm/mach-socfpga/include/mach/system_manager_arria10.h +++ b/arch/arm/mach-socfpga/include/mach/system_manager_arria10.h @@ -31,7 +31,11 @@ #define SYSMGR_A10_NOC_IDLEACK 0xd0 #define SYSMGR_A10_NOC_IDLESTATUS 0xd4 #define SYSMGR_A10_FPGA2SOC_CTRL 0xd8 +#define SYSMGR_A10_ROMCODE_CTRL 0x204 #define SYSMGR_A10_ROMCODE_INITSWSTATE 0x20C +#define SYSMGR_A10_ROMCODE_QSPIRESETCOMMAND 0x208 +#define SYSMGR_A10_ISW_HANDOFF_BASE 0x230 +#define SYSMGR_A10_ISW_HANDOFF_7 0x1c
#define SYSMGR_SDMMC SYSMGR_A10_SDMMC
diff --git a/arch/arm/mach-socfpga/misc_arria10.c b/arch/arm/mach-socfpga/misc_arria10.c index bf978053ca..634e63ed42 100644 --- a/arch/arm/mach-socfpga/misc_arria10.c +++ b/arch/arm/mach-socfpga/misc_arria10.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Copyright (C) 2016-2017 Intel Corporation + * Copyright (C) 2016-2021 Intel Corporation */
#include <altera.h> @@ -11,6 +11,7 @@ #include <miiphy.h> #include <netdev.h> #include <ns16550.h> +#include <spi_flash.h> #include <watchdog.h> #include <asm/arch/misc.h> #include <asm/arch/pinmux.h> @@ -21,6 +22,7 @@ #include <asm/arch/nic301.h> #include <asm/io.h> #include <asm/pl310.h> +#include <linux/sizes.h>
#define PINMUX_UART0_TX_SHARED_IO_OFFSET_Q1_3 0x08 #define PINMUX_UART0_TX_SHARED_IO_OFFSET_Q2_11 0x58 @@ -29,6 +31,12 @@ #define PINMUX_UART1_TX_SHARED_IO_OFFSET_Q3_7 0x78 #define PINMUX_UART1_TX_SHARED_IO_OFFSET_Q4_3 0x98
+#define REGULAR_BOOT_MAGIC 0xd15ea5e + +#define QSPI_S25FL_SOFT_RESET_COMMAND 0x00f0ff82 +#define QSPI_N25_SOFT_RESET_COMMAND 0x00000001 +#define QSPI_NO_SOFT_RESET 0x00000000 + /* * FPGA programming support for SoC FPGA Arria 10 */ @@ -122,3 +130,83 @@ void do_bridge_reset(int enable, unsigned int mask) else socfpga_bridges_reset(); } + +/* + * This function set/unset magic number "0xd15ea5e" to + * handoff register isw_handoff[7] - 0xffd0624c + * This magic number is part of boot progress tracking + * and it's required for warm reset workaround on MPFE hang issue. + */ +void set_regular_boot(unsigned int status) +{ + if (status) + writel(REGULAR_BOOT_MAGIC, socfpga_get_sysmgr_addr() + + SYSMGR_A10_ISW_HANDOFF_BASE + SYSMGR_A10_ISW_HANDOFF_7); + else + writel(0, socfpga_get_sysmgr_addr() + + SYSMGR_A10_ISW_HANDOFF_BASE + SYSMGR_A10_ISW_HANDOFF_7); +} + +/* + * This function is used to check whether + * handoff register isw_handoff[7] contains + * magic number "0xd15ea5e". + */ +bool is_regular_boot_valid(void) +{ + unsigned int status; + + status = readl(socfpga_get_sysmgr_addr() + + SYSMGR_A10_ISW_HANDOFF_BASE + SYSMGR_A10_ISW_HANDOFF_7); + + if (status == REGULAR_BOOT_MAGIC) + return true; + else + return false; +} + +#if IS_ENABLED(CONFIG_CADENCE_QSPI) +/* This function is used to trigger software reset + * to the QSPI flash. On some boards, the QSPI flash reset may + * not be connected to the HPS warm reset. + */ +int qspi_flash_software_reset(void) +{ + struct udevice *flash; + int ret; + + /* Get the flash info */ + ret = spi_flash_probe_bus_cs(CONFIG_SF_DEFAULT_BUS, + CONFIG_SF_DEFAULT_CS, + CONFIG_SF_DEFAULT_SPEED, + CONFIG_SF_DEFAULT_MODE, + &flash); + + if (ret) { + debug("Failed to initialize SPI flash at "); + debug("%u:%u (error %d)\n", CONFIG_SF_DEFAULT_BUS, + CONFIG_SF_DEFAULT_CS, ret); + return -ENODEV; + } + + if (!flash) + return -EINVAL; + + /* + * QSPI flash software reset command, for the case where + * no HPS reset connected to QSPI flash reset + */ + if (!memcmp(flash->name, "N25", SZ_1 + SZ_2)) + writel(QSPI_N25_SOFT_RESET_COMMAND, socfpga_get_sysmgr_addr() + + SYSMGR_A10_ROMCODE_QSPIRESETCOMMAND); + else if (!memcmp(flash->name, "S25FL", SZ_1 + SZ_4)) + writel(QSPI_S25FL_SOFT_RESET_COMMAND, + socfpga_get_sysmgr_addr() + + SYSMGR_A10_ROMCODE_QSPIRESETCOMMAND); + else /* No software reset */ + writel(QSPI_NO_SOFT_RESET, socfpga_get_sysmgr_addr() + + SYSMGR_A10_ROMCODE_QSPIRESETCOMMAND); + + return 0; +} +#endif diff --git a/arch/arm/mach-socfpga/spl_a10.c b/arch/arm/mach-socfpga/spl_a10.c index f6c4b5708d..6450f75058 100644 --- a/arch/arm/mach-socfpga/spl_a10.c +++ b/arch/arm/mach-socfpga/spl_a10.c @@ -30,10 +30,14 @@ #include <asm/arch/fpga_manager.h> #include <mmc.h> #include <memalign.h> +#include <linux/delay.h>
#define FPGA_BUFSIZ 16 * 1024 #define FSBL_IMAGE_IS_VALID 0x49535756
+#define FSBL_IMAGE_IS_INVALID 0x0 +#define BOOTROM_CONFIGURES_IO_PINMUX 0x3 + DECLARE_GLOBAL_DATA_PTR;
#define BOOTROM_SHARED_MEM_SIZE 0x800 /* 2KB */ @@ -107,6 +111,8 @@ u32 spl_mmc_boot_mode(const u32 boot_device)
void spl_board_init(void) { + int ret; + ALLOC_CACHE_ALIGN_BUFFER(char, buf, FPGA_BUFSIZ);
/* enable console uart printing */ @@ -117,8 +123,7 @@ void spl_board_init(void)
/* If the full FPGA is already loaded, ie.from EPCQ, config fpga pins */ if (is_fpgamgr_user_mode()) { - int ret = config_pins(gd->fdt_blob, "shared"); - + ret = config_pins(gd->fdt_blob, "shared"); if (ret) return;
@@ -131,8 +136,93 @@ void spl_board_init(void) }
/* If the IOSSM/full FPGA is already loaded, start DDR */ - if (is_fpgamgr_early_user_mode() || is_fpgamgr_user_mode()) + if (is_fpgamgr_early_user_mode() || is_fpgamgr_user_mode()) { + if (!is_regular_boot_valid()) { + /* + * Ensure all signals in stable state before triggering + * warm reset. This value is recommended from stress + * test. + */ + mdelay(10); + +#if IS_ENABLED(CONFIG_CADENCE_QSPI) + /* + * Trigger software reset to QSPI flash. + * On some boards, the QSPI flash reset may not be + * connected to the HPS warm reset. + */ + qspi_flash_software_reset(); +#endif + + ret = readl(socfpga_get_rstmgr_addr() + + RSTMGR_A10_SYSWARMMASK); + /* + * Masking s2f & FPGA manager module reset from warm + * reset + */ + writel(ret & (~(ALT_RSTMGR_SYSWARMMASK_S2F_SET_MSK | + ALT_RSTMGR_FPGAMGRWARMMASK_S2F_SET_MSK)), + socfpga_get_rstmgr_addr() + + RSTMGR_A10_SYSWARMMASK); + + /* + * BootROM will configure both IO and pin mux after a + * warm reset + */ + ret = readl(socfpga_get_sysmgr_addr() + + SYSMGR_A10_ROMCODE_CTRL); + writel(ret | BOOTROM_CONFIGURES_IO_PINMUX, + socfpga_get_sysmgr_addr() + + SYSMGR_A10_ROMCODE_CTRL); + + /* + * Up to here, image is considered valid and should be + * set as valid before warm reset is triggered + */ + writel(FSBL_IMAGE_IS_VALID, socfpga_get_sysmgr_addr() + + SYSMGR_A10_ROMCODE_INITSWSTATE); + + /* + * Set this flag to scratch register, so that a proper + * boot progress before / after warm reset can be + * tracked by FSBL + */ + set_regular_boot(true); + + WATCHDOG_RESET(); + + reset_cpu(); + } + + /* + * Reset this flag to scratch register, so that a proper + * boot progress before / after warm reset can be + * tracked by FSBL + */ + set_regular_boot(false); + + ret = readl(socfpga_get_rstmgr_addr() + + RSTMGR_A10_SYSWARMMASK); + + /* + * Unmasking s2f & FPGA manager module reset from warm + * reset + */ + writel(ret | ALT_RSTMGR_SYSWARMMASK_S2F_SET_MSK | + ALT_RSTMGR_FPGAMGRWARMMASK_S2F_SET_MSK, + socfpga_get_rstmgr_addr() + RSTMGR_A10_SYSWARMMASK); + + /* + * Up to here, MPFE hang workaround is considered done and + * should be reset as invalid until FSBL successfully loading + * SSBL, and prepare jumping to SSBL, then only setting as + * valid + */ + writel(FSBL_IMAGE_IS_INVALID, socfpga_get_sysmgr_addr() + + SYSMGR_A10_ROMCODE_INITSWSTATE); + ddr_calibration_sequence(); + }
if (!is_fpgamgr_user_mode()) fpgamgr_program(buf, FPGA_BUFSIZ, 0);