+++ /dev/null
-/*
- * 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_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 0;
- }
- return 1;
-}
-
-/* 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. In
- * this, its the chain 3.
- */
- if (io_scan_chain_id == 3)
- 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_chain_engine_is_idle(SCAN_MAX_DELAY))
- 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->fifo_double_byte);
-
- /* calculate array index. Multiply by 4 as write 4 x 32bits */
- index = i * 4;
-
- /* write 4 successive 32-bit IO scan chain data into WFIFO */
- writel(iocsr_scan_chain[index],
- &scan_manager_base->fifo_quad_byte);
- writel(iocsr_scan_chain[index + 1],
- &scan_manager_base->fifo_quad_byte);
- writel(iocsr_scan_chain[index + 2],
- &scan_manager_base->fifo_quad_byte);
- writel(iocsr_scan_chain[index + 3],
- &scan_manager_base->fifo_quad_byte);
-
- /*
- * Check if the scan chain engine has completed the
- * IO scan chain data shifting
- */
- if (!scan_chain_engine_is_idle(SCAN_MAX_DELAY))
- goto error;
- }
-
- /* Calculate array index for final TDI_TDO packet */
- index = io_program_iter * 4;
-
- /* 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;
-
- /*
- * 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->fifo_double_byte);
-
- 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->fifo_quad_byte);
- }
-
- 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->fifo_quad_byte);
- } 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->fifo_single_byte);
- }
- }
-
- /*
- * Check if the scan chain engine has completed the
- * IO scan chain data shifting
- */
- if (!scan_chain_engine_is_idle(SCAN_MAX_DELAY))
- goto error;
- }
-
- /* Disable IO Scan chain when configuration done*/
- clrbits_le32(&scan_manager_base->en, 1 << io_scan_chain_id);
- return 0;
-
-error:
- /* Disable IO Scan chain when error detected */
- clrbits_le32(&scan_manager_base->en, 1 << io_scan_chain_id);
- return 1;
-}
-
-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;
-}
projects / karo-tx-uboot.git / blobdiff