[U-Boot] [PATCH 25/35] arm: socfpga: fpga: Add SoCFPGA FPGA programming interface
Marek Vasut
marex at denx.de
Mon Sep 15 13:06:18 CEST 2014
From: Pavel Machek <pavel at denx.de>
Add code necessary to program the FPGA part of SoCFPGA from U-Boot
with an RBF blob. This patch also integrates the code into the
FPGA driver framework in U-Boot so it can be used via the 'fpga'
command.
Signed-off-by: Pavel Machek <pavel at denx.de>
Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Chin Liang See <clsee at altera.com>
Cc: Dinh Nguyen <dinguyen at altera.com>
Cc: Albert Aribaud <albert.u.boot at aribaud.net>
Cc: Tom Rini <trini at ti.com>
Cc: Wolfgang Denk <wd at denx.de>
Cc: Pavel Machek <pavel at denx.de>
---
arch/arm/cpu/armv7/socfpga/Makefile | 3 +-
arch/arm/cpu/armv7/socfpga/fpga_manager.c | 354 +++++++++++++++++++++++
arch/arm/cpu/armv7/socfpga/misc.c | 37 +++
arch/arm/include/asm/arch-socfpga/fpga_manager.h | 77 +++++
drivers/fpga/altera.c | 21 ++
include/altera.h | 1 +
6 files changed, 492 insertions(+), 1 deletion(-)
create mode 100644 arch/arm/cpu/armv7/socfpga/fpga_manager.c
create mode 100644 arch/arm/include/asm/arch-socfpga/fpga_manager.h
diff --git a/arch/arm/cpu/armv7/socfpga/Makefile b/arch/arm/cpu/armv7/socfpga/Makefile
index eb33f2c..8b6e108 100644
--- a/arch/arm/cpu/armv7/socfpga/Makefile
+++ b/arch/arm/cpu/armv7/socfpga/Makefile
@@ -8,5 +8,6 @@
#
obj-y := lowlevel_init.o
-obj-y += misc.o timer.o reset_manager.o system_manager.o clock_manager.o
+obj-y += misc.o timer.o reset_manager.o system_manager.o clock_manager.o \
+ fpga_manager.o
obj-$(CONFIG_SPL_BUILD) += spl.o freeze_controller.o scan_manager.o
diff --git a/arch/arm/cpu/armv7/socfpga/fpga_manager.c b/arch/arm/cpu/armv7/socfpga/fpga_manager.c
new file mode 100644
index 0000000..38d48f8
--- /dev/null
+++ b/arch/arm/cpu/armv7/socfpga/fpga_manager.c
@@ -0,0 +1,354 @@
+/*
+ * Copyright (C) 2012 Altera Corporation <www.altera.com>
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+#include <asm/arch/fpga_manager.h>
+#include <asm/arch/reset_manager.h>
+#include <asm/arch/system_manager.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Timeout count */
+#define FPGA_TIMEOUT_CNT 0x1000000
+
+static struct socfpga_fpga_manager *fpgamgr_regs =
+ (struct socfpga_fpga_manager *)SOCFPGA_FPGAMGRREGS_ADDRESS;
+static struct socfpga_system_manager *sysmgr_regs =
+ (struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
+
+/* Check whether FPGA Init_Done signal is high */
+static int is_fpgamgr_initdone_high(void)
+{
+ unsigned long val;
+ val = readl(&fpgamgr_regs->gpio_ext_porta);
+ return val & FPGAMGRREGS_MON_GPIO_EXT_PORTA_ID_MASK;
+}
+
+/* Get the FPGA mode */
+static int fpgamgr_get_mode(void)
+{
+ unsigned long val;
+ val = readl(&fpgamgr_regs->stat);
+ return val & FPGAMGRREGS_STAT_MODE_MASK;
+}
+
+/* Check whether FPGA is ready to be accessed */
+int fpgamgr_test_fpga_ready(void)
+{
+ /* Check for init done signal */
+ if (!is_fpgamgr_initdone_high())
+ return 0;
+
+ /* Check again to avoid false glitches */
+ if (!is_fpgamgr_initdone_high())
+ return 0;
+
+ if (fpgamgr_get_mode() != FPGAMGRREGS_MODE_USERMODE)
+ return 0;
+
+ return 1;
+}
+
+/* Poll until FPGA is ready to be accessed or timeout occurred */
+int fpgamgr_poll_fpga_ready(void)
+{
+ unsigned long i;
+
+ /* If FPGA is blank, wait till WD invoke warm reset */
+ for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
+ /* check for init done signal */
+ if (!is_fpgamgr_initdone_high())
+ continue;
+ /* check again to avoid false glitches */
+ if (!is_fpgamgr_initdone_high())
+ continue;
+ return 1;
+ }
+
+ return 0;
+}
+
+/* Set CD ratio */
+static void fpgamgr_set_cd_ratio(unsigned long ratio)
+{
+ clrsetbits_le32(&fpgamgr_regs->ctrl,
+ 0x3 << FPGAMGRREGS_CTRL_CDRATIO_LSB,
+ (ratio & 0x3) << FPGAMGRREGS_CTRL_CDRATIO_LSB);
+}
+
+static int fpgamgr_dclkcnt_set(unsigned long cnt)
+{
+ unsigned long i;
+
+ /* Clear any existing done status */
+ if (readl(&fpgamgr_regs->dclkstat))
+ writel(0x1, &fpgamgr_regs->dclkstat);
+
+ /* Write the dclkcnt */
+ writel(cnt, &fpgamgr_regs->dclkcnt);
+
+ /* Wait till the dclkcnt done */
+ for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
+ if (!readl(&fpgamgr_regs->dclkstat))
+ continue;
+
+ writel(0x1, &fpgamgr_regs->dclkstat);
+ return 0;
+ }
+
+ return -ETIMEDOUT;
+}
+
+/* Start the FPGA programming by initialize the FPGA Manager */
+static int fpgamgr_program_init(void)
+{
+ unsigned long msel, i;
+
+ /* Get the MSEL value */
+ msel = readl(&fpgamgr_regs->stat);
+ msel &= FPGAMGRREGS_STAT_MSEL_MASK;
+ msel >>= FPGAMGRREGS_STAT_MSEL_LSB;
+
+ /*
+ * Set the cfg width
+ * If MSEL[3] = 1, cfg width = 32 bit
+ */
+ if (msel & 0x8) {
+ setbits_le32(&fpgamgr_regs->ctrl,
+ FPGAMGRREGS_CTRL_CFGWDTH_MASK);
+
+ /* To determine the CD ratio */
+ /* MSEL[1:0] = 0, CD Ratio = 1 */
+ if ((msel & 0x3) == 0x0)
+ fpgamgr_set_cd_ratio(CDRATIO_x1);
+ /* MSEL[1:0] = 1, CD Ratio = 4 */
+ else if ((msel & 0x3) == 0x1)
+ fpgamgr_set_cd_ratio(CDRATIO_x4);
+ /* MSEL[1:0] = 2, CD Ratio = 8 */
+ else if ((msel & 0x3) == 0x2)
+ fpgamgr_set_cd_ratio(CDRATIO_x8);
+
+ } else { /* MSEL[3] = 0 */
+ clrbits_le32(&fpgamgr_regs->ctrl,
+ FPGAMGRREGS_CTRL_CFGWDTH_MASK);
+
+ /* To determine the CD ratio */
+ /* MSEL[1:0] = 0, CD Ratio = 1 */
+ if ((msel & 0x3) == 0x0)
+ fpgamgr_set_cd_ratio(CDRATIO_x1);
+ /* MSEL[1:0] = 1, CD Ratio = 2 */
+ else if ((msel & 0x3) == 0x1)
+ fpgamgr_set_cd_ratio(CDRATIO_x2);
+ /* MSEL[1:0] = 2, CD Ratio = 4 */
+ else if ((msel & 0x3) == 0x2)
+ fpgamgr_set_cd_ratio(CDRATIO_x4);
+ }
+
+ /* To enable FPGA Manager configuration */
+ clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_NCE_MASK);
+
+ /* To enable FPGA Manager drive over configuration line */
+ setbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_EN_MASK);
+
+ /* Put FPGA into reset phase */
+ setbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_NCONFIGPULL_MASK);
+
+ /* (1) wait until FPGA enter reset phase */
+ for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
+ if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_RESETPHASE)
+ break;
+ }
+
+ /* If not in reset state, return error */
+ if (fpgamgr_get_mode() != FPGAMGRREGS_MODE_RESETPHASE) {
+ puts("FPGA: Could not reset\n");
+ return -1;
+ }
+
+ /* Release FPGA from reset phase */
+ clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_NCONFIGPULL_MASK);
+
+ /* (2) wait until FPGA enter configuration phase */
+ for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
+ if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_CFGPHASE)
+ break;
+ }
+
+ /* If not in configuration state, return error */
+ if (fpgamgr_get_mode() != FPGAMGRREGS_MODE_CFGPHASE) {
+ puts("FPGA: Could not configure\n");
+ return -2;
+ }
+
+ /* Clear all interrupts in CB Monitor */
+ writel(0xFFF, &fpgamgr_regs->gpio_porta_eoi);
+
+ /* Enable AXI configuration */
+ setbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_AXICFGEN_MASK);
+
+ return 0;
+}
+
+/* Write the RBF data to FPGA Manager */
+static noinline void fpgamgr_program_write(const unsigned long *rbf_data,
+ unsigned long rbf_size)
+{
+ uint32_t src = (uint32_t)rbf_data;
+ uint32_t dst = SOCFPGA_FPGAMGRDATA_ADDRESS;
+
+ /* Number of loops for 32-byte long copying. */
+ uint32_t loops32 = rbf_size / 32;
+ /* Number of loops for 4-byte long copying + trailing bytes */
+ uint32_t loops4 = DIV_ROUND_UP(rbf_size % 32, 4);
+
+ asm volatile(
+ "1: ldmia %0!, {r0-r7}\n"
+ " stmia %1!, {r0-r7}\n"
+ " sub %1, #32\n"
+ " subs %2, #1\n"
+ " bne 1b\n"
+ "2: ldr %2, [%0], #4\n"
+ " str %2, [%1]\n"
+ " subs %3, #1\n"
+ " bne 2b\n"
+ : "+r"(src), "+r"(dst), "+r"(loops32), "+r"(loops4) :
+ : "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "cc");
+}
+
+/* Ensure the FPGA entering config done */
+static int fpgamgr_program_poll_cd(void)
+{
+ const uint32_t mask = FPGAMGRREGS_MON_GPIO_EXT_PORTA_NS_MASK |
+ FPGAMGRREGS_MON_GPIO_EXT_PORTA_CD_MASK;
+ unsigned long reg, i;
+
+ /* (3) wait until full config done */
+ for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
+ reg = readl(&fpgamgr_regs->gpio_ext_porta);
+
+ /* Config error */
+ if (!(reg & mask)) {
+ printf("FPGA: Configuration error.\n");
+ return -3;
+ }
+
+ /* Config done without error */
+ if (reg & mask)
+ break;
+ }
+
+ /* Timeout happened, return error */
+ if (i == FPGA_TIMEOUT_CNT) {
+ printf("FPGA: Timeout waiting for program.\n");
+ return -4;
+ }
+
+ /* Disable AXI configuration */
+ clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_AXICFGEN_MASK);
+
+ return 0;
+}
+
+/* Ensure the FPGA entering init phase */
+static int fpgamgr_program_poll_initphase(void)
+{
+ unsigned long i;
+
+ /* Additional clocks for the CB to enter initialization phase */
+ if (fpgamgr_dclkcnt_set(0x4))
+ return -5;
+
+ /* (4) wait until FPGA enter init phase or user mode */
+ for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
+ if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_INITPHASE)
+ break;
+ if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_USERMODE)
+ break;
+ }
+
+ /* If not in configuration state, return error */
+ if (i == FPGA_TIMEOUT_CNT)
+ return -6;
+
+ return 0;
+}
+
+/* Ensure the FPGA entering user mode */
+static int fpgamgr_program_poll_usermode(void)
+{
+ unsigned long i;
+
+ /* Additional clocks for the CB to exit initialization phase */
+ if (fpgamgr_dclkcnt_set(0x5000))
+ return -7;
+
+ /* (5) wait until FPGA enter user mode */
+ for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
+ if (fpgamgr_get_mode() == FPGAMGRREGS_MODE_USERMODE)
+ break;
+ }
+ /* If not in configuration state, return error */
+ if (i == FPGA_TIMEOUT_CNT)
+ return -8;
+
+ /* To release FPGA Manager drive over configuration line */
+ clrbits_le32(&fpgamgr_regs->ctrl, FPGAMGRREGS_CTRL_EN_MASK);
+
+ 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 fpgamgr_program_fpga(const unsigned long *rbf_data, unsigned long rbf_size)
+{
+ unsigned long status;
+
+ if ((uint32_t)rbf_data & 0x3) {
+ puts("FPGA: Unaligned data, realign to 32bit boundary.\n");
+ return -EINVAL;
+ }
+
+ /* Prior programming the FPGA, all bridges need to be shut off */
+
+ /* Disable all signals from hps peripheral controller to fpga */
+ writel(0, &sysmgr_regs->fpgaintfgrp_module);
+
+ /* Disable all signals from FPGA to HPS SDRAM */
+#define SDR_CTRLGRP_FPGAPORTRST_ADDRESS 0x5080
+ writel(0, SOCFPGA_SDR_ADDRESS + SDR_CTRLGRP_FPGAPORTRST_ADDRESS);
+
+ /* Disable all axi bridge (hps2fpga, lwhps2fpga & fpga2hps) */
+ socfpga_bridges_reset(1);
+
+ /* Unmap the bridges from NIC-301 */
+ writel(0x1, SOCFPGA_L3REGS_ADDRESS);
+
+ /* Initialize the FPGA Manager */
+ status = fpgamgr_program_init();
+ if (status)
+ return status;
+
+ /* Write the RBF data to FPGA Manager */
+ fpgamgr_program_write(rbf_data, rbf_size);
+
+ /* Ensure the FPGA entering config done */
+ status = fpgamgr_program_poll_cd();
+ if (status)
+ return status;
+
+ /* Ensure the FPGA entering init phase */
+ status = fpgamgr_program_poll_initphase();
+ if (status)
+ return status;
+
+ /* Ensure the FPGA entering user mode */
+ return fpgamgr_program_poll_usermode();
+}
diff --git a/arch/arm/cpu/armv7/socfpga/misc.c b/arch/arm/cpu/armv7/socfpga/misc.c
index 51be55c..8e25f09 100644
--- a/arch/arm/cpu/armv7/socfpga/misc.c
+++ b/arch/arm/cpu/armv7/socfpga/misc.c
@@ -6,6 +6,7 @@
#include <common.h>
#include <asm/io.h>
+#include <altera.h>
#include <miiphy.h>
#include <netdev.h>
#include <asm/arch/reset_manager.h>
@@ -93,8 +94,44 @@ int overwrite_console(void)
}
#endif
+#ifdef CONFIG_FPGA
+/*
+ * FPGA programming support for SoC FPGA Cyclone V
+ */
+static Altera_desc altera_fpga[] = {
+ {
+ /* Family */
+ Altera_SoCFPGA,
+ /* Interface type */
+ fast_passive_parallel,
+ /* No limitation as additional data will be ignored */
+ -1,
+ /* No device function table */
+ NULL,
+ /* Base interface address specified in driver */
+ NULL,
+ /* No cookie implementation */
+ 0
+ },
+};
+
+/* add device descriptor to FPGA device table */
+static void socfpga_fpga_add(void)
+{
+ int i;
+ fpga_init();
+ for (i = 0; i < ARRAY_SIZE(altera_fpga); i++)
+ fpga_add(fpga_altera, &altera_fpga[i]);
+}
+#else
+static inline void socfpga_fpga_add(void) {}
+#endif
+
int misc_init_r(void)
{
+ /* Add device descriptor to FPGA device table */
+ socfpga_fpga_add();
+
/* This is needed, otherwise kernel is rebooted by watchdog. */
watchdog_disable();
diff --git a/arch/arm/include/asm/arch-socfpga/fpga_manager.h b/arch/arm/include/asm/arch-socfpga/fpga_manager.h
new file mode 100644
index 0000000..4812591
--- /dev/null
+++ b/arch/arm/include/asm/arch-socfpga/fpga_manager.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2012 Altera Corporation <www.altera.com>
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef _FPGA_MANAGER_H_
+#define _FPGA_MANAGER_H_
+
+struct socfpga_fpga_manager {
+ /* FPGA Manager Module */
+ u32 stat; /* 0x00 */
+ u32 ctrl;
+ u32 dclkcnt;
+ u32 dclkstat;
+ u32 gpo; /* 0x10 */
+ u32 gpi;
+ u32 misci; /* 0x18 */
+ u32 _pad_0x1c_0x82c[517];
+
+ /* Configuration Monitor (MON) Registers */
+ u32 gpio_inten; /* 0x830 */
+ u32 gpio_intmask;
+ u32 gpio_inttype_level;
+ u32 gpio_int_polarity;
+ u32 gpio_intstatus; /* 0x840 */
+ u32 gpio_raw_intstatus;
+ u32 _pad_0x848;
+ u32 gpio_porta_eoi;
+ u32 gpio_ext_porta; /* 0x850 */
+ u32 _pad_0x854_0x85c[3];
+ u32 gpio_1s_sync; /* 0x860 */
+ u32 _pad_0x864_0x868[2];
+ u32 gpio_ver_id_code;
+ u32 gpio_config_reg2; /* 0x870 */
+ u32 gpio_config_reg1;
+};
+
+#define FPGAMGRREGS_STAT_MODE_MASK 0x7
+#define FPGAMGRREGS_STAT_MSEL_MASK 0xf8
+#define FPGAMGRREGS_STAT_MSEL_LSB 3
+
+#define FPGAMGRREGS_CTRL_CFGWDTH_MASK 0x200
+#define FPGAMGRREGS_CTRL_AXICFGEN_MASK 0x100
+#define FPGAMGRREGS_CTRL_NCONFIGPULL_MASK 0x4
+#define FPGAMGRREGS_CTRL_NCE_MASK 0x2
+#define FPGAMGRREGS_CTRL_EN_MASK 0x1
+#define FPGAMGRREGS_CTRL_CDRATIO_LSB 6
+
+#define FPGAMGRREGS_MON_GPIO_EXT_PORTA_CRC_MASK 0x8
+#define FPGAMGRREGS_MON_GPIO_EXT_PORTA_ID_MASK 0x4
+#define FPGAMGRREGS_MON_GPIO_EXT_PORTA_CD_MASK 0x2
+#define FPGAMGRREGS_MON_GPIO_EXT_PORTA_NS_MASK 0x1
+
+/* FPGA Mode */
+#define FPGAMGRREGS_MODE_FPGAOFF 0x0
+#define FPGAMGRREGS_MODE_RESETPHASE 0x1
+#define FPGAMGRREGS_MODE_CFGPHASE 0x2
+#define FPGAMGRREGS_MODE_INITPHASE 0x3
+#define FPGAMGRREGS_MODE_USERMODE 0x4
+#define FPGAMGRREGS_MODE_UNKNOWN 0x5
+
+/* FPGA CD Ratio Value */
+#define CDRATIO_x1 0x0
+#define CDRATIO_x2 0x1
+#define CDRATIO_x4 0x2
+#define CDRATIO_x8 0x3
+
+/* SoCFPGA support functions */
+int fpgamgr_test_fpga_ready(void);
+int fpgamgr_poll_fpga_ready(void);
+
+/* FPGA driver API function */
+int fpgamgr_program_fpga(const unsigned long *rbf_data, unsigned long rbf_size);
+
+#endif /* _FPGA_MANAGER_H_ */
diff --git a/drivers/fpga/altera.c b/drivers/fpga/altera.c
index 6e34a8e..d20b7be 100644
--- a/drivers/fpga/altera.c
+++ b/drivers/fpga/altera.c
@@ -1,4 +1,7 @@
/*
+ * (C) Copyright 2013
+ * Altera Corporation <www.altera.com>
+ *
* (C) Copyright 2003
* Steven Scholz, imc Measurement & Control, steven.scholz at imc-berlin.de
*
@@ -14,6 +17,9 @@
#include <common.h>
#include <ACEX1K.h>
#include <stratixII.h>
+#if defined(CONFIG_FPGA_SOCFPGA)
+#include <asm/arch/fpga_manager.h>
+#endif
/* Define FPGA_DEBUG to get debug printf's */
/* #define FPGA_DEBUG */
@@ -59,6 +65,13 @@ int altera_load(Altera_desc *desc, const void *buf, size_t bsize)
ret_val = StratixII_load (desc, buf, bsize);
break;
#endif
+#if defined(CONFIG_FPGA_SOCFPGA)
+ case Altera_SoCFPGA:
+ PRINTF("%s: Launching the SoC FPGA Loader...\n",
+ __func__);
+ ret_val = fpgamgr_program_fpga(buf, bsize);
+ break;
+#endif
default:
printf ("%s: Unsupported family type, %d\n",
__FUNCTION__, desc->family);
@@ -94,6 +107,11 @@ int altera_dump(Altera_desc *desc, const void *buf, size_t bsize)
ret_val = StratixII_dump (desc, buf, bsize);
break;
#endif
+ case Altera_SoCFPGA:
+ printf("%s: Unsupported due to security reason, %d\n",
+ __func__, desc->family);
+ ret_val = FPGA_SUCCESS;
+ break;
default:
printf ("%s: Unsupported family type, %d\n",
__FUNCTION__, desc->family);
@@ -119,6 +137,9 @@ int altera_info( Altera_desc *desc )
case Altera_StratixII:
printf ("Stratix II\n");
break;
+ case Altera_SoCFPGA:
+ printf("SoC FPGA\n");
+ break;
/* Add new family types here */
default:
printf ("Unknown family type, %d\n", desc->family);
diff --git a/include/altera.h b/include/altera.h
index ae5f7ee..c7f78fc 100644
--- a/include/altera.h
+++ b/include/altera.h
@@ -27,6 +27,7 @@ typedef enum { /* typedef Altera_Family */
Altera_ACEX1K, /* ACEX1K Family */
Altera_CYC2, /* CYCLONII Family */
Altera_StratixII, /* StratixII Family */
+ Altera_SoCFPGA, /* SoCFPGA Family */
/* Add new models here */
max_altera_type /* insert all new types before this */
} Altera_Family; /* end, typedef Altera_Family */
--
2.1.0
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