From mboxrd@z Thu Jan 1 00:00:00 1970 From: Albert ARIBAUD Date: Thu, 13 Feb 2014 10:09:15 +0100 Subject: [U-Boot] [RESEND PATCH 1/2 v2] socfpga: Adding Scan Manager driver In-Reply-To: <1391541322-3052-1-git-send-email-clsee@altera.com> References: <1391541322-3052-1-git-send-email-clsee@altera.com> Message-ID: <20140213100915.2e64398c@lilith> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi Chin, On Tue, 4 Feb 2014 13:15:22 -0600, Chin Liang See 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 > Cc: Dinh Nguyen > Cc: Wolfgang Denk > CC: Pavel Machek > Cc: Tom Rini > Cc: Albert Aribaud > > Signed-off-by: Chin Liang See > --- > 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 > + * > + * SPDX-License-Identifier: GPL-2.0+ > + */ > + > + > +#include > +#include > +#include > +#include > + > +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 > + * > + * 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 > #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, -- Albert.