diff options
Diffstat (limited to 'drivers/fpga/socfpga_arria10.c')
| -rw-r--r-- | drivers/fpga/socfpga_arria10.c | 479 |
1 files changed, 479 insertions, 0 deletions
diff --git a/drivers/fpga/socfpga_arria10.c b/drivers/fpga/socfpga_arria10.c new file mode 100644 index 0000000000..5c1a68a009 --- /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()) { + 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_NSTATUS_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_PIN_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 & ~BIT(0)) { + 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; +} + +static int fpgamgr_reset(void) +{ + unsigned long reg; + + /* S2F_NCONFIG = 0 */ + clrbits_le32(&fpga_manager_base->imgcfg_ctrl_00, + ALT_FPGAMGR_IMGCFG_CTL_00_S2F_NCONFIG_SET_MSK); + + /* Wait for f2s_nstatus == 0 */ + if (wait_for_f2s_nstatus_pin(0)) + return -ETIME; + + /* S2F_NCONFIG = 1 */ + setbits_le32(&fpga_manager_base->imgcfg_ctrl_00, + ALT_FPGAMGR_IMGCFG_CTL_00_S2F_NCONFIG_SET_MSK); + + /* Wait for f2s_nstatus == 1 */ + if (wait_for_f2s_nstatus_pin(1)) + return -ETIME; + + /* read and confirm f2s_condone_pin = 0 and f2s_condone_oe = 1 */ + reg = readl(&fpga_manager_base->imgcfg_stat); + if ((reg & ALT_FPGAMGR_IMGCFG_STAT_F2S_CONDONE_PIN_SET_MSK) != 0) + return -EPERM; + + if ((reg & ALT_FPGAMGR_IMGCFG_STAT_F2S_CONDONE_OE_SET_MSK) == 0) + return -EPERM; + + return 0; +} + +/* Start the FPGA programming by initialize the FPGA Manager */ +int fpgamgr_program_init(u32 * rbf_data, size_t rbf_size) +{ + int ret; + + /* Step 1 */ + if (fpgamgr_verify_msel()) + return -EPERM; + + /* Step 2 */ + if (fpgamgr_set_cdratio_cdwidth(CFGWDTH_32, rbf_data, rbf_size)) + return -EPERM; + + /* + * Step 3: + * Make sure no other external devices are trying to interfere with + * programming: + */ + if (wait_for_nconfig_pin_and_nstatus_pin()) + return -ETIME; + + /* + * Step 4: + * Deassert the signal drives from HPS + * + * S2F_NCE = 1 + * S2F_PR_REQUEST = 0 + * EN_CFG_CTRL = 0 + * EN_CFG_DATA = 0 + * S2F_NCONFIG = 1 + * S2F_NSTATUS_OE = 0 + * S2F_CONDONE_OE = 0 + */ + setbits_le32(&fpga_manager_base->imgcfg_ctrl_01, + ALT_FPGAMGR_IMGCFG_CTL_01_S2F_NCE_SET_MSK); + + clrbits_le32(&fpga_manager_base->imgcfg_ctrl_01, + ALT_FPGAMGR_IMGCFG_CTL_01_S2F_PR_REQUEST_SET_MSK); + + clrbits_le32(&fpga_manager_base->imgcfg_ctrl_02, + ALT_FPGAMGR_IMGCFG_CTL_02_EN_CFG_DATA_SET_MSK | + ALT_FPGAMGR_IMGCFG_CTL_02_EN_CFG_CTRL_SET_MSK); + + setbits_le32(&fpga_manager_base->imgcfg_ctrl_00, + ALT_FPGAMGR_IMGCFG_CTL_00_S2F_NCONFIG_SET_MSK); + + clrbits_le32(&fpga_manager_base->imgcfg_ctrl_00, + ALT_FPGAMGR_IMGCFG_CTL_00_S2F_NSTATUS_OE_SET_MSK | + ALT_FPGAMGR_IMGCFG_CTL_00_S2F_CONDONE_OE_SET_MSK); + + /* + * Step 5: + * Enable overrides + * S2F_NENABLE_CONFIG = 0 + * S2F_NENABLE_NCONFIG = 0 + */ + clrbits_le32(&fpga_manager_base->imgcfg_ctrl_01, + ALT_FPGAMGR_IMGCFG_CTL_01_S2F_NENABLE_CONFIG_SET_MSK); + clrbits_le32(&fpga_manager_base->imgcfg_ctrl_00, + ALT_FPGAMGR_IMGCFG_CTL_00_S2F_NENABLE_NCONFIG_SET_MSK); + + /* + * Disable driving signals that HPS doesn't need to drive. + * S2F_NENABLE_NSTATUS = 1 + * S2F_NENABLE_CONDONE = 1 + */ + setbits_le32(&fpga_manager_base->imgcfg_ctrl_00, + ALT_FPGAMGR_IMGCFG_CTL_00_S2F_NENABLE_NSTATUS_SET_MSK | + ALT_FPGAMGR_IMGCFG_CTL_00_S2F_NENABLE_CONDONE_SET_MSK); + + /* + * Step 6: + * Drive chip select S2F_NCE = 0 + */ + clrbits_le32(&fpga_manager_base->imgcfg_ctrl_01, + ALT_FPGAMGR_IMGCFG_CTL_01_S2F_NCE_SET_MSK); + + /* Step 7 */ + if (wait_for_nconfig_pin_and_nstatus_pin()) + return -ETIME; + + /* Step 8 */ + ret = fpgamgr_reset(); + + if (ret) + return ret; + + /* + * Step 9: + * EN_CFG_CTRL and EN_CFG_DATA = 1 + */ + setbits_le32(&fpga_manager_base->imgcfg_ctrl_02, + ALT_FPGAMGR_IMGCFG_CTL_02_EN_CFG_DATA_SET_MSK | + ALT_FPGAMGR_IMGCFG_CTL_02_EN_CFG_CTRL_SET_MSK); + + return 0; +} + +/* Ensure the FPGA entering config done */ +static int fpgamgr_program_poll_cd(void) +{ + unsigned long reg, i; + + for (i = 0; i < FPGA_TIMEOUT_CNT; i++) { + reg = readl(&fpga_manager_base->imgcfg_stat); + if (reg & ALT_FPGAMGR_IMGCFG_STAT_F2S_CONDONE_PIN_SET_MSK) + return 0; + + if ((reg & ALT_FPGAMGR_IMGCFG_STAT_F2S_NSTATUS_PIN_SET_MSK) == 0) { + printf("nstatus == 0 while waiting for condone\n"); + return -EPERM; + } + } + + if (i == FPGA_TIMEOUT_CNT) + return -ETIME; + + return 0; +} + +/* Ensure the FPGA entering user mode */ +static int fpgamgr_program_poll_usermode(void) +{ + unsigned long reg; + int ret = 0; + + if (fpgamgr_dclkcnt_set(0xf)) + return -ETIME; + + ret = wait_for_user_mode(); + if (ret < 0) { + printf("%s: Failed to enter user mode with ", __func__); + printf("error code %d\n", ret); + return ret; + } + + /* + * Step 14: + * Stop DATA path and Dclk + * EN_CFG_CTRL and EN_CFG_DATA = 0 + */ + clrbits_le32(&fpga_manager_base->imgcfg_ctrl_02, + ALT_FPGAMGR_IMGCFG_CTL_02_EN_CFG_DATA_SET_MSK | + ALT_FPGAMGR_IMGCFG_CTL_02_EN_CFG_CTRL_SET_MSK); + + /* + * Step 15: + * Disable overrides + * S2F_NENABLE_CONFIG = 1 + * S2F_NENABLE_NCONFIG = 1 + */ + setbits_le32(&fpga_manager_base->imgcfg_ctrl_01, + ALT_FPGAMGR_IMGCFG_CTL_01_S2F_NENABLE_CONFIG_SET_MSK); + setbits_le32(&fpga_manager_base->imgcfg_ctrl_00, + ALT_FPGAMGR_IMGCFG_CTL_00_S2F_NENABLE_NCONFIG_SET_MSK); + + /* Disable chip select S2F_NCE = 1 */ + setbits_le32(&fpga_manager_base->imgcfg_ctrl_01, + ALT_FPGAMGR_IMGCFG_CTL_01_S2F_NCE_SET_MSK); + + /* + * Step 16: + * Final check + */ + reg = readl(&fpga_manager_base->imgcfg_stat); + if (((reg & ALT_FPGAMGR_IMGCFG_STAT_F2S_USERMODE_SET_MSK) != + ALT_FPGAMGR_IMGCFG_STAT_F2S_USERMODE_SET_MSK) || + ((reg & ALT_FPGAMGR_IMGCFG_STAT_F2S_CONDONE_PIN_SET_MSK) != + ALT_FPGAMGR_IMGCFG_STAT_F2S_CONDONE_PIN_SET_MSK) || + ((reg & ALT_FPGAMGR_IMGCFG_STAT_F2S_NSTATUS_PIN_SET_MSK) != + ALT_FPGAMGR_IMGCFG_STAT_F2S_NSTATUS_PIN_SET_MSK)) + return -EPERM; + + return 0; +} + +int fpgamgr_program_finish(void) +{ + /* Ensure the FPGA entering config done */ + int status = fpgamgr_program_poll_cd(); + + if (status) { + printf("FPGA: Poll CD failed with error code %d\n", status); + return -EPERM; + } + WATCHDOG_RESET(); + + /* Ensure the FPGA entering user mode */ + status = fpgamgr_program_poll_usermode(); + if (status) { + printf("FPGA: Poll usermode failed with error code %d\n", + status); + return -EPERM; + } + + printf("Full Configuration Succeeded.\n"); + + return 0; +} + +/* + * FPGA Manager to program the FPGA. This is the interface used by FPGA driver. + * Return 0 for sucess, non-zero for error. + */ +int socfpga_load(Altera_desc *desc, const void *rbf_data, size_t rbf_size) +{ + unsigned long status; + + /* disable all signals from hps peripheral controller to fpga */ + writel(0, &system_manager_base->fpgaintf_en_global); + + /* disable all axi bridge (hps2fpga, lwhps2fpga & fpga2hps) */ + socfpga_bridges_reset(); + + /* Initialize the FPGA Manager */ + status = fpgamgr_program_init((u32 *)rbf_data, rbf_size); + if (status) + return status; + + /* Write the RBF data to FPGA Manager */ + fpgamgr_program_write(rbf_data, rbf_size); + + return fpgamgr_program_finish(); +} |