arm: socfpga: fpga: Add SoCFPGA FPGA programming interface
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@denx.de>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Chin Liang See <clsee@altera.com>
Cc: Dinh Nguyen <dinguyen@altera.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Tom Rini <trini@ti.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Pavel Machek <pavel@denx.de>
V2: Move the not-CPU specific stuff into drivers/fpga/ and base
this on the cleaned up altera FPGA support.
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..43fd2fe
--- /dev/null
+++ b/arch/arm/cpu/armv7/socfpga/fpga_manager.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2012 Altera Corporation <www.altera.com>
+ * All rights reserved.
+ *
+ * This file contains only support functions used also by the SoCFPGA
+ * platform code, the real meat is located in drivers/fpga/socfpga.c .
+ *
+ * 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;
+
+/* 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 */
+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;
+}
diff --git a/arch/arm/cpu/armv7/socfpga/misc.c b/arch/arm/cpu/armv7/socfpga/misc.c
index f41c329..b07d97e 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>
@@ -93,6 +94,39 @@
}
#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 arch_cpu_init(void)
{
/*
@@ -108,5 +142,7 @@
int misc_init_r(void)
{
+ /* Add device descriptor to FPGA device table */
+ socfpga_fpga_add();
return 0;
}
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..a077e22
--- /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_
+
+#include <altera.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);
+int fpgamgr_get_mode(void);
+
+#endif /* _FPGA_MANAGER_H_ */