Hi Albert,
On Thu, 13 Feb 2014 10:09:15 +0100, Albert ARIBAUD
<albert.u.b...@aribaud.net> wrote:
> Hi Chin,
>
> On Tue, 4 Feb 2014 13:15:22 -0600, Chin Liang See <cl...@altera.com>
> wrote:
>
> > 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 <cl...@altera.com>
> > Cc: Dinh Nguyen <dingu...@altera.com>
> > Cc: Wolfgang Denk <w...@denx.de>
> > CC: Pavel Machek <pa...@denx.de>
> > Cc: Tom Rini <tr...@ti.com>
> > Cc: Albert Aribaud <albert.u.b...@aribaud.net>
> >
> > Signed-off-by: Chin Liang See <cl...@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
>
> Applied to u-boot-arm/master, thanks!
>
> Note that arch/arm/cpu/armv7/socfpga/scan_manager.c had spurious empty
> lines at the end; I fixed that.
>
> Tom: as V1 and V2 were assigned to me, I reassigned this RESEND from
> you to me and fixed V1 and V2 status in patchwork to superseded.
>
> Amicalement,
Correction -- while both patches together do work, the first one does
not, for the reason that it relies on a file which is only created by
the second patch.
Please re-send as a single patch, or in reversed order, so that build
works at each patch.
Amicalement,
--
Albert (who is *really* going to try buildman).
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