[U-Boot] [PATCH v11 6/6] arm: socfpga: Add FPGA driver support for Arria 10

[Chee, Tien Fong <tien.fong.chee@intel.com>]

On Rab, 2017-07-12 at 13:00 +0200, Marek Vasut wrote:
> On 07/03/2017 11:07 AM, tien.fong.chee at intel.com wrote:
> > 
> > From: Tien Fong Chee <tien.fong.chee@intel.com>
> > 
> > Add FPGA driver support for Arria 10.
> > 
> > Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
> > Reviewed-by: Ley Foon Tan <ley.foon.tan@intel.com>
> > Reviewed-by: Dinh Nguyen <dinguyen@kernel.org>
> [...]
> 
> > 
> > diff --git a/configs/socfpga_arria10_defconfig
> > b/configs/socfpga_arria10_defconfig
> > index 46bda47..53ab66f 100644
> > --- a/configs/socfpga_arria10_defconfig
> > +++ b/configs/socfpga_arria10_defconfig
> defconfig stuff should be in separate patch.
> 
Okay.
> > 
> > @@ -6,6 +6,7 @@ CONFIG_IDENT_STRING="socfpga_arria10"
> >  CONFIG_DEFAULT_DEVICE_TREE="socfpga_arria10_socdk_sdmmc"
> >  CONFIG_DEFAULT_FDT_FILE="socfpga_arria10_socdk_sdmmc.dtb"
> >  CONFIG_SPL=y
> > +CONFIG_SPL_FPGA_SUPPORT=y
> >  CONFIG_CMD_BOOTZ=y
> >  # CONFIG_CMD_IMLS is not set
> >  CONFIG_CMD_ASKENV=y
> > @@ -22,6 +23,7 @@ CONFIG_DOS_PARTITION=y
> >  # CONFIG_SPL_DOS_PARTITION is not set
> >  CONFIG_SPL_DM=y
> >  CONFIG_SPL_DM_SEQ_ALIAS=y
> > +CONFIG_FPGA_SOCFPGA=y
> >  CONFIG_DM_GPIO=y
> >  CONFIG_DWAPB_GPIO=y
> >  CONFIG_DM_MMC=y
> > diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile
> > index b65e5ba..08c9ff8 100644
> > --- a/drivers/fpga/Makefile
> > +++ b/drivers/fpga/Makefile
> > @@ -21,4 +21,5 @@ obj-$(CONFIG_FPGA_STRATIX_II) += stratixII.o
> >  obj-$(CONFIG_FPGA_STRATIX_V) += stratixv.o
> >  obj-$(CONFIG_FPGA_SOCFPGA) += socfpga.o
> >  obj-$(CONFIG_TARGET_SOCFPGA_GEN5) += socfpga_gen5.o
> > +obj-$(CONFIG_TARGET_SOCFPGA_ARRIA10) += socfpga_arria10.o
> >  endif
> > diff --git a/drivers/fpga/socfpga_arria10.c
> > b/drivers/fpga/socfpga_arria10.c
> > new file mode 100644
> > index 0000000..5c717a8
> > --- /dev/null
> > +++ b/drivers/fpga/socfpga_arria10.c
> > @@ -0,0 +1,479 @@
> > +/*
> > + * Copyright (C) 2017 Intel Corporation <www.intel.com>
> > + *
> > + * SPDX-License-Identifier:    GPL-2.0
> > + */
> > +
> > +#include <asm/io.h>
> > +#include <asm/arch/fpga_manager.h>
> > +#include <asm/arch/reset_manager.h>
> > +#include <asm/arch/system_manager.h>
> > +#include <asm/arch/sdram.h>
> > +#include <asm/arch/misc.h>
> > +#include <altera.h>
> > +#include <common.h>
> > +#include <errno.h>
> > +#include <wait_bit.h>
> > +#include <watchdog.h>
> > +
> > +#define CFGWDTH_32	1
> > +#define MIN_BITSTREAM_SIZECHECK	230
> > +#define ENCRYPTION_OFFSET	69
> > +#define COMPRESSION_OFFSET	229
> > +#define FPGA_TIMEOUT_MSEC	1000  /* timeout in ms */
> > +#define FPGA_TIMEOUT_CNT	0x1000000
> > +
> > +DECLARE_GLOBAL_DATA_PTR;
> > +
> > +static const struct socfpga_fpga_manager *fpga_manager_base =
> > +		(void *)SOCFPGA_FPGAMGRREGS_ADDRESS;
> > +
> > +static const struct socfpga_system_manager *system_manager_base =
> > +		(void *)SOCFPGA_SYSMGR_ADDRESS;
> > +
> > +static void fpgamgr_set_cd_ratio(unsigned long ratio);
> > +
> > +static uint32_t fpgamgr_get_msel(void)
> > +{
> > +	u32 reg;
> > +
> > +	reg = readl(&fpga_manager_base->imgcfg_stat);
> > +	reg = (reg & ALT_FPGAMGR_IMGCFG_STAT_F2S_MSEL_SET_MSD) >>
> > +		ALT_FPGAMGR_IMGCFG_STAT_F2S_MSEL0_LSB;
> > +
> > +	return reg;
> > +}
> > +
> > +static void fpgamgr_set_cfgwdth(int width)
> > +{
> > +	if (width)
> > +		setbits_le32(&fpga_manager_base->imgcfg_ctrl_02,
> > +			ALT_FPGAMGR_IMGCFG_CTL_02_CFGWIDTH_SET_MSK
> > );
> > +	else
> > +		clrbits_le32(&fpga_manager_base->imgcfg_ctrl_02,
> > +			ALT_FPGAMGR_IMGCFG_CTL_02_CFGWIDTH_SET_MSK
> > );
> > +}
> > +
> > +int is_fpgamgr_user_mode(void)
> > +{
> > +	return (readl(&fpga_manager_base->imgcfg_stat) &
> > +		ALT_FPGAMGR_IMGCFG_STAT_F2S_USERMODE_SET_MSK) !=
> > 0;
> > +}
> > +
> > +static int wait_for_user_mode(void)
> > +{
> > +	return wait_for_bit(__func__,
> > +		&fpga_manager_base->imgcfg_stat,
> > +		ALT_FPGAMGR_IMGCFG_STAT_F2S_USERMODE_SET_MSK,
> > +		1, FPGA_TIMEOUT_MSEC, false);
> > +}
> > +
> > +static int is_fpgamgr_early_user_mode(void)
> > +{
> > +	return (readl(&fpga_manager_base->imgcfg_stat) &
> > +		ALT_FPGAMGR_IMGCFG_STAT_F2S_EARLY_USERMODE_SET_MSK
> > ) != 0;
> > +}
> > +
> > +int fpgamgr_wait_early_user_mode(void)
> > +{
> > +	u32 sync_data = 0xffffffff;
> > +	u32 i = 0;
> > +	unsigned start = get_timer(0);
> > +	unsigned long cd_ratio;
> > +
> > +	/* Getting existing CDRATIO */
> > +	cd_ratio = (readl(&fpga_manager_base->imgcfg_ctrl_02) &
> > +		ALT_FPGAMGR_IMGCFG_CTL_02_CDRATIO_SET_MSK) >>
> > +		ALT_FPGAMGR_IMGCFG_CTL_02_CDRATIO_LSB;
> > +
> > +	/* Using CDRATIO_X1 for better compatibility */
> > +	fpgamgr_set_cd_ratio(CDRATIO_x1);
> > +
> > +	while (!(is_fpgamgr_early_user_mode())) {
> The parens around is_fpga.... are superfluous, drop them.
> 
Okay.
> > 
> > +		if (get_timer(start) > FPGA_TIMEOUT_MSEC)
> > +			return -ETIMEDOUT;
> > +		fpgamgr_program_write((const long unsigned int
> > *)&sync_data,
> > +				sizeof(sync_data));
> > +		udelay(FPGA_TIMEOUT_MSEC);
> > +		i++;
> > +	}
> > +
> > +	debug("Additional %i sync word needed\n", i);
> > +
> > +	/* restoring original CDRATIO */
> > +	fpgamgr_set_cd_ratio(cd_ratio);
> > +
> > +	return 0;
> > +}
> > +
> > +/* Read f2s_nconfig_pin and f2s_nstatus_pin; loop until de-
> > asserted */
> > +static int wait_for_nconfig_pin_and_nstatus_pin(void)
> > +{
> > +	unsigned long mask =
> > ALT_FPGAMGR_IMGCFG_STAT_F2S_NCONFIG_PIN_SET_MSK |
> > +				ALT_FPGAMGR_IMGCFG_STAT_F2S_NSTATU
> > S_PIN_SET_MSK;
> > +
> > +	/* Poll until f2s_nconfig_pin and f2s_nstatus_pin; loop
> > until de-asserted,
> > +	 * timeout at 1000ms
> > +	 */
> > +	return wait_for_bit(__func__,
> > +			    &fpga_manager_base->imgcfg_stat,
> > +			    mask,
> > +			    false, FPGA_TIMEOUT_MSEC, false);
> > +}
> > +
> > +static int wait_for_f2s_nstatus_pin(unsigned long value)
> > +{
> > +	/* Poll until f2s to specific value, timeout at 1000ms */
> > +	return wait_for_bit(__func__,
> > +			    &fpga_manager_base->imgcfg_stat,
> > +			    ALT_FPGAMGR_IMGCFG_STAT_F2S_NSTATUS_PI
> > N_SET_MSK,
> > +			    value, FPGA_TIMEOUT_MSEC, false);
> > +}
> > +
> > +/* set CD ratio */
> > +static void fpgamgr_set_cd_ratio(unsigned long ratio)
> > +{
> > +	clrbits_le32(&fpga_manager_base->imgcfg_ctrl_02,
> > +		ALT_FPGAMGR_IMGCFG_CTL_02_CDRATIO_SET_MSK);
> > +
> > +	setbits_le32(&fpga_manager_base->imgcfg_ctrl_02,
> > +		(ratio << ALT_FPGAMGR_IMGCFG_CTL_02_CDRATIO_LSB) &
> > +		ALT_FPGAMGR_IMGCFG_CTL_02_CDRATIO_SET_MSK);
> > +}
> > +
> > +/* get the MSEL value, verify we are set for FPP configuration
> > mode */
> > +static int fpgamgr_verify_msel(void)
> > +{
> > +	u32 msel = fpgamgr_get_msel();
> > +
> > +	if ((msel != 0) && (msel != 1)) {
> You mean if (msel & ~BIT(0)) ?
> 
yes.
> > 
> > +		printf("Fail: read msel=%d\n", msel);
> > +		return -EPERM;
> > +	}
> > +
> > +	return 0;
> > +}
> > +
> > +/*
> > + * Write cdratio and cdwidth based on whether the bitstream is
> > compressed
> > + * and/or encoded
> > + */
> > +static int fpgamgr_set_cdratio_cdwidth(unsigned int cfg_width, u32
> > *rbf_data,
> > +				       size_t rbf_size)
> > +{
> > +	unsigned int cd_ratio;
> > +	bool encrypt, compress;
> > +
> > +	/*
> > +         * According to the bitstream specification,
> > +	 * both encryption and compression status are
> > +         * in location before offset 230 of the buffer.
> > +         */
> > +	if (rbf_size < MIN_BITSTREAM_SIZECHECK)
> > +		return -EINVAL;
> > +
> > +	encrypt = (rbf_data[ENCRYPTION_OFFSET] >> 2) & 3;
> > +	encrypt = encrypt != 0;
> > +
> > +	compress = (rbf_data[COMPRESSION_OFFSET] >> 1) & 1;
> > +	compress = !compress;
> > +
> > +	debug("header word %d = %08x\n", 69, rbf_data[69]);
> > +	debug("header word %d = %08x\n", 229, rbf_data[229]);
> > +	debug("read from rbf header: encrypt=%d compress=%d\n",
> > encrypt, compress);
> > +
> > +	/*
> > +	 * from the register map description of cdratio in
> > imgcfg_ctrl_02:
> > +	 *  Normal Configuration    : 32bit Passive Parallel
> > +	 *  Partial Reconfiguration : 16bit Passive Parallel
> > +	 */
> > +
> > +	/*
> > +	 * cd ratio is dependent on cfg width and whether the
> > bitstream
> > +	 * is encrypted and/or compressed.
> > +	 *
> > +	 * | width | encr. | compr. | cd ratio |
> > +	 * |  16   |   0   |   0    |     1    |
> > +	 * |  16   |   0   |   1    |     4    |
> > +	 * |  16   |   1   |   0    |     2    |
> > +	 * |  16   |   1   |   1    |     4    |
> > +	 * |  32   |   0   |   0    |     1    |
> > +	 * |  32   |   0   |   1    |     8    |
> > +	 * |  32   |   1   |   0    |     4    |
> > +	 * |  32   |   1   |   1    |     8    |
> > +	 */
> > +	if (!compress && !encrypt) {
> > +		cd_ratio = CDRATIO_x1;
> > +	} else {
> > +		if (compress)
> > +			cd_ratio = CDRATIO_x4;
> > +		else
> > +			cd_ratio = CDRATIO_x2;
> > +
> > +		/* if 32 bit, double the cd ratio (so register
> > +		   field setting is incremented) */
> > +		if (cfg_width == CFGWDTH_32)
> > +			cd_ratio += 1;
> > +	}
> > +
> > +	fpgamgr_set_cfgwdth(cfg_width);
> > +	fpgamgr_set_cd_ratio(cd_ratio);
> > +
> > +	return 0;
> > +}
> [...]
> 
> > 
> > diff --git a/include/configs/socfpga_common.h
> > b/include/configs/socfpga_common.h
> > index 1b79c03..edd973a 100644
> > --- a/include/configs/socfpga_common.h
> > +++ b/include/configs/socfpga_common.h
> > @@ -105,11 +105,10 @@
> >  /*
> >   * FPGA Driver
> >   */
> > -#ifdef CONFIG_TARGET_SOCFPGA_GEN5
> >  #ifdef CONFIG_CMD_FPGA
> >  #define CONFIG_FPGA_COUNT		1
> >  #endif
> > -#endif
> Should be in separate patch, cf above.
> 
okay.
> > 
> >  /*
> >   * L4 OSC1 Timer 0
> >   */
> > 
>