diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-socfpga/include/mach/scan_manager.h | 42 | ||||
| -rw-r--r-- | arch/arm/mach-socfpga/scan_manager.c | 47 |
2 files changed, 17 insertions, 72 deletions
diff --git a/arch/arm/mach-socfpga/include/mach/scan_manager.h b/arch/arm/mach-socfpga/include/mach/scan_manager.h index ddf8790..3b55e37 100644 --- a/arch/arm/mach-socfpga/include/mach/scan_manager.h +++ b/arch/arm/mach-socfpga/include/mach/scan_manager.h @@ -17,48 +17,6 @@ struct socfpga_scan_manager { u32 fifo_quad_byte; }; -/* - * 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 - int scan_mgr_configure_iocsr(void); int iocsr_get_config_table(const unsigned int chain_id, const unsigned long **table, diff --git a/arch/arm/mach-socfpga/scan_manager.c b/arch/arm/mach-socfpga/scan_manager.c index a7434e4..dd32195 100644 --- a/arch/arm/mach-socfpga/scan_manager.c +++ b/arch/arm/mach-socfpga/scan_manager.c @@ -18,6 +18,12 @@ */ #define SCANMGR_MAX_DELAY 100 +/* + * Maximum length of TDI_TDO packet payload is 128 bits, + * represented by (length - 1) in TDI_TDO header. + */ +#define TDI_TDO_MAX_PAYLOAD 127 + #define SCANMGR_STAT_ACTIVE (1 << 31) #define SCANMGR_STAT_WFIFOCNT_MASK 0x70000000 @@ -101,13 +107,10 @@ static void scan_mgr_jtag_io(const u32 flags, const u8 iarg, const u32 parg) */ static int scan_mgr_io_scan_chain_prg(const unsigned int io_scan_chain_id) { - uint32_t io_program_iter; - uint32_t io_scan_chain_data_residual; - uint32_t residual; - uint32_t i, ret; - uint32_t index = 0; - uint32_t io_scan_chain_len_in_bits; + u32 residual; + u32 io_scan_chain_len_in_bits; const unsigned long *iocsr_scan_chain; + int i, ret, index = 0; ret = iocsr_get_config_table(io_scan_chain_id, &iocsr_scan_chain, &io_scan_chain_len_in_bits); @@ -136,17 +139,8 @@ static int scan_mgr_io_scan_chain_prg(const unsigned int io_scan_chain_id) */ 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; - /* Program IO scan chain in 128-bit iteration */ - for (i = 0; i < io_program_iter; i++) { + for (i = 0; i < io_scan_chain_len_in_bits / 128; i++) { /* Write TDI_TDO packet header for 128-bit IO scan chain */ scan_mgr_jtag_io(JTAG_BP_INSN | JTAG_BP_2BYTE, 0x0, TDI_TDO_MAX_PAYLOAD); @@ -166,23 +160,18 @@ static int scan_mgr_io_scan_chain_prg(const unsigned int io_scan_chain_id) goto error; } - /* Final TDI_TDO packet if any */ - if (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; + residual = io_scan_chain_len_in_bits % 128; + /* Final TDI_TDO packet (if chain length is not aligned to 128 bits) */ + if (residual) { /* * Program the last part of IO scan chain write TDI_TDO * packet header (2 bytes) to scan manager. */ scan_mgr_jtag_io(JTAG_BP_INSN | JTAG_BP_2BYTE, 0x0, - io_scan_chain_data_residual - 1); + residual - 1); - for (i = 0; i < io_program_iter; i++) { + for (i = 0; i < residual / 32; i++) { /* * write remaining scan chain data into scan * manager WFIFO with 4 bytes write @@ -191,10 +180,8 @@ static int scan_mgr_io_scan_chain_prg(const unsigned int io_scan_chain_id) iocsr_scan_chain[index++]); } - residual = io_scan_chain_data_residual & - IO_SCAN_CHAIN_32BIT_MASK; - - if (IO_SCAN_CHAIN_PAYLOAD_24BIT < residual) { + residual = io_scan_chain_len_in_bits % 32; + if (residual > 24) { /* * write the last 4B scan chain data * into scan manager WFIFO |