Scan Manager driver will be called to configure the IOCSR scan chain. This configuration will setup the IO buffer settings
Signed-off-by: Chin Liang See clsee@altera.com Cc: Dinh Nguyen dinguyen@altera.com Cc: Wolfgang Denk wd@denx.de CC: Pavel Machek pavel@denx.de Cc: Tom Rini trini@ti.com Cc: Albert Aribaud albert.u.boot@aribaud.net
Signed-off-by: Chin Liang See clsee@altera.com --- Changes for v2 - rebase with latest v2014.01-rc1 --- arch/arm/cpu/armv7/socfpga/Makefile | 2 +- arch/arm/cpu/armv7/socfpga/scan_manager.c | 231 ++++++++++++++++++++ arch/arm/cpu/armv7/socfpga/spl.c | 4 + arch/arm/include/asm/arch-socfpga/scan_manager.h | 97 ++++++++ .../include/asm/arch-socfpga/socfpga_base_addrs.h | 1 + include/configs/socfpga_cyclone5.h | 1 + 6 files changed, 335 insertions(+), 1 deletion(-) create mode 100644 arch/arm/cpu/armv7/socfpga/scan_manager.c create mode 100644 arch/arm/include/asm/arch-socfpga/scan_manager.h
diff --git a/arch/arm/cpu/armv7/socfpga/Makefile b/arch/arm/cpu/armv7/socfpga/Makefile index 3e84a0c..4edc5d4 100644 --- a/arch/arm/cpu/armv7/socfpga/Makefile +++ b/arch/arm/cpu/armv7/socfpga/Makefile @@ -9,4 +9,4 @@
obj-y := lowlevel_init.o obj-y += misc.o timer.o reset_manager.o system_manager.o -obj-$(CONFIG_SPL_BUILD) += spl.o freeze_controller.o +obj-$(CONFIG_SPL_BUILD) += spl.o freeze_controller.o scan_manager.o diff --git a/arch/arm/cpu/armv7/socfpga/scan_manager.c b/arch/arm/cpu/armv7/socfpga/scan_manager.c new file mode 100644 index 0000000..30cbb8b --- /dev/null +++ b/arch/arm/cpu/armv7/socfpga/scan_manager.c @@ -0,0 +1,231 @@ +/* + * Copyright (C) 2013 Altera Corporation <www.altera.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/freeze_controller.h> +#include <asm/arch/scan_manager.h> + +DECLARE_GLOBAL_DATA_PTR; + +static const struct socfpga_scan_manager *scan_manager_base = + (void *)(SOCFPGA_SCANMGR_ADDRESS); +static const struct socfpga_freeze_controller *freeze_controller_base = + (void *)(SOCFPGA_SYSMGR_ADDRESS + SYSMGR_FRZCTRL_ADDRESS); + +/* + * Function to check IO scan chain engine status and wait if the engine is + * is active. Poll the IO scan chain engine till maximum iteration reached. + */ +static inline uint32_t scan_mgr_io_scan_chain_engine_is_idle(uint32_t max_iter) +{ + uint32_t scanmgr_status; + + scanmgr_status = readl(&scan_manager_base->stat); + + /* Poll the engine until the scan engine is inactive */ + while (SCANMGR_STAT_ACTIVE_GET(scanmgr_status) + || (SCANMGR_STAT_WFIFOCNT_GET(scanmgr_status) > 0)) { + + max_iter--; + + if (max_iter > 0) + scanmgr_status = readl(&scan_manager_base->stat); + else + return SCAN_MGR_IO_SCAN_ENGINE_STATUS_ACTIVE; + } + return SCAN_MGR_IO_SCAN_ENGINE_STATUS_IDLE; +} + + + +/* Program HPS IO Scan Chain */ +uint32_t scan_mgr_io_scan_chain_prg( + uint32_t io_scan_chain_id, + uint32_t io_scan_chain_len_in_bits, + const uint32_t *iocsr_scan_chain) +{ + + uint16_t tdi_tdo_header; + uint32_t io_program_iter; + uint32_t io_scan_chain_data_residual; + uint32_t residual; + uint32_t i; + uint32_t index = 0; + + /* De-assert reinit if the IO scan chain is intended for HIO */ + if (3 == io_scan_chain_id) + clrbits_le32(&freeze_controller_base->hioctrl, + SYSMGR_FRZCTRL_HIOCTRL_DLLRST_MASK); + + /* + * Check if the scan chain engine is inactive and the + * WFIFO is empty before enabling the IO scan chain + */ + if (SCAN_MGR_IO_SCAN_ENGINE_STATUS_IDLE + != scan_mgr_io_scan_chain_engine_is_idle( + MAX_WAITING_DELAY_IO_SCAN_ENGINE)) { + return 1; + } + + /* + * Enable IO Scan chain based on scan chain id + * Note: only one chain can be enabled at a time + */ + setbits_le32(&scan_manager_base->en, 1 << io_scan_chain_id); + + /* + * Calculate number of iteration needed for full 128-bit (4 x32-bits) + * bits shifting. Each TDI_TDO packet can shift in maximum 128-bits + */ + io_program_iter = io_scan_chain_len_in_bits >> + IO_SCAN_CHAIN_128BIT_SHIFT; + io_scan_chain_data_residual = io_scan_chain_len_in_bits & + IO_SCAN_CHAIN_128BIT_MASK; + + /* Construct TDI_TDO packet for 128-bit IO scan chain (2 bytes) */ + tdi_tdo_header = TDI_TDO_HEADER_FIRST_BYTE | (TDI_TDO_MAX_PAYLOAD << + TDI_TDO_HEADER_SECOND_BYTE_SHIFT); + + /* Program IO scan chain in 128-bit iteration */ + for (i = 0; i < io_program_iter; i++) { + + /* write TDI_TDO packet header to scan manager */ + writel(tdi_tdo_header, &scan_manager_base->fifodoublebyte); + + /* calculate array index */ + index = i * 4; + + /* write 4 successive 32-bit IO scan chain data into WFIFO */ + writel(iocsr_scan_chain[index], + &scan_manager_base->fifoquadbyte); + writel(iocsr_scan_chain[index + 1], + &scan_manager_base->fifoquadbyte); + writel(iocsr_scan_chain[index + 2], + &scan_manager_base->fifoquadbyte); + writel(iocsr_scan_chain[index + 3], + &scan_manager_base->fifoquadbyte); + + /* + * Check if the scan chain engine has completed the + * IO scan chain data shifting + */ + if (SCAN_MGR_IO_SCAN_ENGINE_STATUS_IDLE + != scan_mgr_io_scan_chain_engine_is_idle( + MAX_WAITING_DELAY_IO_SCAN_ENGINE)) { + /* Disable IO Scan chain when error detected */ + clrbits_le32(&scan_manager_base->en, + 1 << io_scan_chain_id); + return 1; + } + } + + /* Calculate array index for final TDI_TDO packet */ + index = io_program_iter * 4; + + /* Final TDI_TDO packet if any */ + if (0 != io_scan_chain_data_residual) { + + /* + * Calculate number of quad bytes FIFO write + * needed for the final TDI_TDO packet + */ + io_program_iter = io_scan_chain_data_residual >> + IO_SCAN_CHAIN_32BIT_SHIFT; + + /* + * Construct TDI_TDO packet for remaining IO + * scan chain (2 bytes) + */ + tdi_tdo_header = TDI_TDO_HEADER_FIRST_BYTE | + ((io_scan_chain_data_residual - 1) + << TDI_TDO_HEADER_SECOND_BYTE_SHIFT); + + /* + * Program the last part of IO scan chain write TDI_TDO packet + * header (2 bytes) to scan manager + */ + writel(tdi_tdo_header, &scan_manager_base->fifodoublebyte); + + for (i = 0; i < io_program_iter; i++) { + /* + * write remaining scan chain data into scan + * manager WFIFO with 4 bytes write + */ + writel(iocsr_scan_chain[index + i], + &scan_manager_base->fifoquadbyte); + } + + index += io_program_iter; + residual = io_scan_chain_data_residual & + IO_SCAN_CHAIN_32BIT_MASK; + + if (IO_SCAN_CHAIN_PAYLOAD_24BIT < residual) { + /* + * write the last 4B scan chain data + * into scan manager WFIFO + */ + writel(iocsr_scan_chain[index], + &scan_manager_base->fifoquadbyte); + + } else { + /* + * write the remaining 1 - 3 bytes scan chain + * data into scan manager WFIFO byte by byte + * to prevent JTAG engine shifting unused data + * from the FIFO and mistaken the data as a + * valid command (even though unused bits are + * set to 0, but just to prevent hardware + * glitch) + */ + for (i = 0; i < residual; i += 8) { + writel(((iocsr_scan_chain[index] >> i) + & IO_SCAN_CHAIN_BYTE_MASK), + &scan_manager_base->fifosinglebyte); + + } + } + + /* + * Check if the scan chain engine has completed the + * IO scan chain data shifting + */ + if (SCAN_MGR_IO_SCAN_ENGINE_STATUS_IDLE + != scan_mgr_io_scan_chain_engine_is_idle( + MAX_WAITING_DELAY_IO_SCAN_ENGINE)) { + /* Disable IO Scan chain when error detected */ + clrbits_le32(&scan_manager_base->en, + 1 << io_scan_chain_id); + return 1; + } + } /* if (io_scan_chain_data_residual) */ + + /* Disable IO Scan chain when configuration done*/ + clrbits_le32(&scan_manager_base->en, + 1 << io_scan_chain_id); + + return 0; +} + +int scan_mgr_configure_iocsr(void) +{ + int status = 0; + + /* configure the IOCSR through scan chain */ + status |= scan_mgr_io_scan_chain_prg(0, + CONFIG_HPS_IOCSR_SCANCHAIN0_LENGTH, iocsr_scan_chain0_table); + status |= scan_mgr_io_scan_chain_prg(1, + CONFIG_HPS_IOCSR_SCANCHAIN1_LENGTH, iocsr_scan_chain1_table); + status |= scan_mgr_io_scan_chain_prg(2, + CONFIG_HPS_IOCSR_SCANCHAIN2_LENGTH, iocsr_scan_chain2_table); + status |= scan_mgr_io_scan_chain_prg(3, + CONFIG_HPS_IOCSR_SCANCHAIN3_LENGTH, iocsr_scan_chain3_table); + return status; +} + + + diff --git a/arch/arm/cpu/armv7/socfpga/spl.c b/arch/arm/cpu/armv7/socfpga/spl.c index 36a00c3..8a49a1a 100644 --- a/arch/arm/cpu/armv7/socfpga/spl.c +++ b/arch/arm/cpu/armv7/socfpga/spl.c @@ -32,6 +32,10 @@ void spl_board_init(void) /* freeze all IO banks */ sys_mgr_frzctrl_freeze_req();
+ /* configure the IOCSR / IO buffer settings */ + if (scan_mgr_configure_iocsr()) + hang(); + /* configure the pin muxing through system manager */ sysmgr_pinmux_init(); #endif /* CONFIG_SOCFPGA_VIRTUAL_TARGET */ diff --git a/arch/arm/include/asm/arch-socfpga/scan_manager.h b/arch/arm/include/asm/arch-socfpga/scan_manager.h new file mode 100644 index 0000000..dfbfade --- /dev/null +++ b/arch/arm/include/asm/arch-socfpga/scan_manager.h @@ -0,0 +1,97 @@ +/* + * Copyright (C) 2013 Altera Corporation <www.altera.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _SCAN_MANAGER_H_ +#define _SCAN_MANAGER_H_ + +struct socfpga_scan_manager { + u32 stat; + u32 en; + u32 padding[2]; + u32 fifosinglebyte; + u32 fifodoublebyte; + u32 fifoquadbyte; +}; + +/* + * Shift count to get number of IO scan chain data in granularity + * of 128-bit ( N / 128 ) + */ +#define IO_SCAN_CHAIN_128BIT_SHIFT (7) + +/* + * Mask to get residual IO scan chain data in + * granularity of 128-bit ( N mod 128 ) + */ +#define IO_SCAN_CHAIN_128BIT_MASK (0x7F) + +/* + * Shift count to get number of IO scan chain + * data in granularity of 32-bit ( N / 32 ) + */ +#define IO_SCAN_CHAIN_32BIT_SHIFT (5) + +/* + * Mask to get residual IO scan chain data in + * granularity of 32-bit ( N mod 32 ) + */ +#define IO_SCAN_CHAIN_32BIT_MASK (0x1F) + +/* Byte mask */ +#define IO_SCAN_CHAIN_BYTE_MASK (0xFF) + +/* 24-bits (3 bytes) IO scan chain payload definition */ +#define IO_SCAN_CHAIN_PAYLOAD_24BIT (24) + +/* + * Maximum length of TDI_TDO packet payload is 128 bits, + * represented by (length - 1) in TDI_TDO header + */ +#define TDI_TDO_MAX_PAYLOAD (127) + +/* TDI_TDO packet header for IO scan chain program */ +#define TDI_TDO_HEADER_FIRST_BYTE (0x80) + +/* Position of second command byte for TDI_TDO packet */ +#define TDI_TDO_HEADER_SECOND_BYTE_SHIFT (8) + +/* IO scan chain engine is idle */ +#define SCAN_MGR_IO_SCAN_ENGINE_STATUS_IDLE (0) + +/* IO scan chain engine is active */ +#define SCAN_MGR_IO_SCAN_ENGINE_STATUS_ACTIVE (1) + +/* + * Maximum polling loop to wait for IO scan chain engine + * becomes idle to prevent infinite loop + */ +#define MAX_WAITING_DELAY_IO_SCAN_ENGINE (100) + +#define SCANMGR_STAT_ACTIVE_GET(x) (((x) & 0x80000000) >> 31) +#define SCANMGR_STAT_WFIFOCNT_GET(x) (((x) & 0x70000000) >> 28) + +/* + * Program HPS IO Scan Chain + * io_scan_chain_id - IO scan chain ID + * io_scan_chain_len_in_bits - IO scan chain length in bits + * iocsr_scan_chain - IO scan chain table + */ +uint32_t scan_mgr_io_scan_chain_prg( + uint32_t io_scan_chain_id, + uint32_t io_scan_chain_len_in_bits, + const uint32_t *iocsr_scan_chain); + + +extern const uint32_t iocsr_scan_chain0_table[ + ((CONFIG_HPS_IOCSR_SCANCHAIN0_LENGTH / 32) + 1)]; +extern const uint32_t iocsr_scan_chain1_table[ + ((CONFIG_HPS_IOCSR_SCANCHAIN1_LENGTH / 32) + 1)]; +extern const uint32_t iocsr_scan_chain2_table[ + ((CONFIG_HPS_IOCSR_SCANCHAIN2_LENGTH / 32) + 1)]; +extern const uint32_t iocsr_scan_chain3_table[ + ((CONFIG_HPS_IOCSR_SCANCHAIN3_LENGTH / 32) + 1)]; + +#endif /* _SCAN_MANAGER_H_ */ diff --git a/arch/arm/include/asm/arch-socfpga/socfpga_base_addrs.h b/arch/arm/include/asm/arch-socfpga/socfpga_base_addrs.h index 50c4ebd..8d329cf 100644 --- a/arch/arm/include/asm/arch-socfpga/socfpga_base_addrs.h +++ b/arch/arm/include/asm/arch-socfpga/socfpga_base_addrs.h @@ -13,5 +13,6 @@ #define SOCFPGA_OSC1TIMER0_ADDRESS 0xffd00000 #define SOCFPGA_RSTMGR_ADDRESS 0xffd05000 #define SOCFPGA_SYSMGR_ADDRESS 0xffd08000 +#define SOCFPGA_SCANMGR_ADDRESS 0xfff02000
#endif /* _SOCFPGA_BASE_ADDRS_H_ */ diff --git a/include/configs/socfpga_cyclone5.h b/include/configs/socfpga_cyclone5.h index 608578a..3d553f7 100644 --- a/include/configs/socfpga_cyclone5.h +++ b/include/configs/socfpga_cyclone5.h @@ -8,6 +8,7 @@
#include <asm/arch/socfpga_base_addrs.h> #include "../../board/altera/socfpga/pinmux_config.h" +#include "../../board/altera/socfpga/iocsr_config.h"
/* * High level configuration