[U-Boot] [PATCH 3/3] arm: mvebu: theadorable: Add StratixV FPGA programming support
Stefan Roese
sr at denx.de
Fri Feb 12 13:52:18 CET 2016
This patch adds support for Altera StratixV bitstream programming. 2 FPGAs
are connected to the SPI busses. This patch uses board specific write
code to program the bitstream via SPI direct write mode.
Signed-off-by: Stefan Roese <sr at denx.de>
Cc: Luka Perkov <luka.perkov at sartura.hr>
---
arch/arm/dts/armada-xp-theadorable.dts | 21 ++++
board/theadorable/Makefile | 1 +
board/theadorable/fpga.c | 179 +++++++++++++++++++++++++++++++++
board/theadorable/theadorable.c | 3 +
board/theadorable/theadorable.h | 12 +++
configs/theadorable_debug_defconfig | 3 +-
configs/theadorable_defconfig | 2 +-
include/configs/theadorable.h | 5 +
8 files changed, 224 insertions(+), 2 deletions(-)
create mode 100644 board/theadorable/fpga.c
create mode 100644 board/theadorable/theadorable.h
diff --git a/arch/arm/dts/armada-xp-theadorable.dts b/arch/arm/dts/armada-xp-theadorable.dts
index cf1be2a..7087ccf 100644
--- a/arch/arm/dts/armada-xp-theadorable.dts
+++ b/arch/arm/dts/armada-xp-theadorable.dts
@@ -69,6 +69,7 @@
aliases {
spi0 = &spi0;
+ spi1 = &spi1;
ethernet0 = ð0;
};
@@ -137,6 +138,26 @@
reg = <0>; /* Chip select 0 */
spi-max-frequency = <27777777>;
};
+
+ fpga at 1 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "spi-generic-device";
+ reg = <1>; /* Chip select 1 */
+ spi-max-frequency = <27777777>;
+ };
+ };
+
+ spi1: spi at 10680 {
+ status = "okay";
+
+ fpga at 2 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "spi-generic-device";
+ reg = <2>; /* Chip select 2 */
+ spi-max-frequency = <27777777>;
+ };
};
};
};
diff --git a/board/theadorable/Makefile b/board/theadorable/Makefile
index 9d5b39e..ef5a519 100644
--- a/board/theadorable/Makefile
+++ b/board/theadorable/Makefile
@@ -5,3 +5,4 @@
#
obj-y := theadorable.o
+obj-y += fpga.o
diff --git a/board/theadorable/fpga.c b/board/theadorable/fpga.c
new file mode 100644
index 0000000..6f068c3
--- /dev/null
+++ b/board/theadorable/fpga.c
@@ -0,0 +1,179 @@
+/*
+ * Copyright (C) 2016 Stefan Roese <sr at denx.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <altera.h>
+#include <errno.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/soc.h>
+#include <asm/arch-mvebu/spi.h>
+#include "theadorable.h"
+
+/*
+ * FPGA programming support
+ */
+static int fpga_pre_fn(int cookie)
+{
+ int gpio_config = COOKIE2CONFIG(cookie);
+ int gpio_done = COOKIE2DONE(cookie);
+ int ret;
+
+ debug("%s (%d): cookie=%08x gpio_config=%d gpio_done=%d\n",
+ __func__, __LINE__, cookie, gpio_config, gpio_done);
+
+ /* Configure config pin */
+ /* Set to output */
+ ret = gpio_request(gpio_config, "CONFIG");
+ if (ret < 0)
+ return ret;
+ gpio_direction_output(gpio_config, 1);
+
+ /* Configure done pin */
+ /* Set to input */
+ ret = gpio_request(gpio_done, "DONE");
+ if (ret < 0)
+ return ret;
+
+ gpio_direction_input(gpio_done);
+
+ return 0;
+}
+
+static int fpga_config_fn(int assert, int flush, int cookie)
+{
+ int gpio_config = COOKIE2CONFIG(cookie);
+
+ debug("%s (%d): cookie=%08x gpio_config=%d\n",
+ __func__, __LINE__, cookie, gpio_config);
+
+ if (assert)
+ gpio_set_value(gpio_config, 1);
+ else
+ gpio_set_value(gpio_config, 0);
+
+ return 0;
+}
+
+static int fpga_write_fn(const void *buf, size_t len, int flush, int cookie)
+{
+ int spi_bus = COOKIE2SPI_BUS(cookie);
+ int spi_dev = COOKIE2SPI_DEV(cookie);
+ struct kwspi_registers *reg;
+ u32 control_reg;
+ u32 config_reg;
+ void *dst;
+
+ /*
+ * Write data to FPGA attached to SPI bus via SPI direct write.
+ * This results in the fastest and easiest way to program the
+ * bitstream into the FPGA.
+ */
+ debug("%s (%d): cookie=%08x spi_bus=%d spi_dev=%d\n",
+ __func__, __LINE__, cookie, spi_bus, spi_dev);
+
+ if (spi_bus == 0) {
+ reg = (struct kwspi_registers *)MVEBU_REGISTER(0x10600);
+ dst = (void *)SPI_BUS0_DEV1_BASE;
+ } else {
+ reg = (struct kwspi_registers *)MVEBU_REGISTER(0x10680);
+ dst = (void *)SPI_BUS1_DEV2_BASE;
+ }
+
+ /* Configure SPI controller for direct access mode */
+ control_reg = readl(®->ctrl);
+ config_reg = readl(®->cfg);
+ writel(0x00000214, ®->cfg); /* 27MHz clock */
+ writel(0x00000000, ®->dw_cfg); /* don't de-asset CS */
+ writel(KWSPI_CSN_ACT, ®->ctrl); /* activate CS */
+
+ /* Copy data to the SPI direct mapped window */
+ memcpy(dst, buf, len);
+
+ /* Restore original register values */
+ writel(control_reg, ®->ctrl);
+ writel(config_reg, ®->cfg);
+
+ return 0;
+}
+
+/* Returns the state of CONF_DONE Pin */
+static int fpga_done_fn(int cookie)
+{
+ int gpio_done = COOKIE2DONE(cookie);
+ unsigned long ts;
+
+ debug("%s (%d): cookie=%08x gpio_done=%d\n",
+ __func__, __LINE__, cookie, gpio_done);
+
+ ts = get_timer(0);
+ do {
+ if (gpio_get_value(gpio_done))
+ return 0;
+ } while (get_timer(ts) < 1000);
+
+ /* timeout so return error */
+ return -ENODEV;
+}
+
+static altera_board_specific_func stratixv_fns = {
+ .pre = fpga_pre_fn,
+ .config = fpga_config_fn,
+ .write = fpga_write_fn,
+ .done = fpga_done_fn,
+};
+
+static Altera_desc altera_fpga[] = {
+ {
+ /* Family */
+ Altera_StratixV,
+ /* Interface type */
+ passive_serial,
+ /* No limitation as additional data will be ignored */
+ -1,
+ /* Device function table */
+ (void *)&stratixv_fns,
+ /* Base interface address specified in driver */
+ NULL,
+ /* Cookie implementation */
+ /*
+ * In this 32bit word the following information is coded:
+ * Bit 31 ... Bit 0
+ * SPI-Bus | SPI-Dev | Config-Pin | Done-Pin
+ */
+ FPGA_COOKIE(0, 1, 26, 7)
+ },
+ {
+ /* Family */
+ Altera_StratixV,
+ /* Interface type */
+ passive_serial,
+ /* No limitation as additional data will be ignored */
+ -1,
+ /* Device function table */
+ (void *)&stratixv_fns,
+ /* Base interface address specified in driver */
+ NULL,
+ /* Cookie implementation */
+ /*
+ * In this 32bit word the following information is coded:
+ * Bit 31 ... Bit 0
+ * SPI-Bus | SPI-Dev | Config-Pin | Done-Pin
+ */
+ FPGA_COOKIE(1, 2, 29, 9)
+ },
+};
+
+/* Add device descriptor to FPGA device table */
+void board_fpga_add(void)
+{
+ int i;
+
+ fpga_init();
+ for (i = 0; i < ARRAY_SIZE(altera_fpga); i++)
+ fpga_add(fpga_altera, &altera_fpga[i]);
+}
diff --git a/board/theadorable/theadorable.c b/board/theadorable/theadorable.c
index 0e23265..3c7f15a 100644
--- a/board/theadorable/theadorable.c
+++ b/board/theadorable/theadorable.c
@@ -11,6 +11,7 @@
#ifdef CONFIG_NET
#include <netdev.h>
#endif
+#include "theadorable.h"
#include "../drivers/ddr/marvell/axp/ddr3_hw_training.h"
#include "../arch/arm/mach-mvebu/serdes/axp/high_speed_env_spec.h"
@@ -143,6 +144,8 @@ int checkboard(void)
{
puts("Board: theadorable\n");
+ board_fpga_add();
+
return 0;
}
diff --git a/board/theadorable/theadorable.h b/board/theadorable/theadorable.h
new file mode 100644
index 0000000..89fe117
--- /dev/null
+++ b/board/theadorable/theadorable.h
@@ -0,0 +1,12 @@
+/*
+ * Copyright (C) 2016 Stefan Roese <sr at denx.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/* Base addresses for the SPI direct access mode */
+#define SPI_BUS0_DEV1_BASE 0xe0000000
+#define SPI_BUS0_DEV1_SIZE (1 << 20)
+#define SPI_BUS1_DEV2_BASE (SPI_BUS0_DEV1_BASE + SPI_BUS0_DEV1_SIZE)
+
+void board_fpga_add(void);
diff --git a/configs/theadorable_debug_defconfig b/configs/theadorable_debug_defconfig
index fbed23c..086d220 100644
--- a/configs/theadorable_debug_defconfig
+++ b/configs/theadorable_debug_defconfig
@@ -2,6 +2,7 @@ CONFIG_ARM=y
CONFIG_ARCH_MVEBU=y
CONFIG_SYS_MALLOC_F_LEN=0x2000
CONFIG_TARGET_THEADORABLE=y
+CONFIG_DM_GPIO=y
CONFIG_DEFAULT_DEVICE_TREE="armada-xp-theadorable"
# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
CONFIG_SPL=y
@@ -9,7 +10,7 @@ CONFIG_SPL=y
# CONFIG_CMD_FLASH is not set
CONFIG_CMD_SF=y
CONFIG_CMD_USB=y
-# CONFIG_CMD_FPGA is not set
+CONFIG_CMD_GPIO=y
# CONFIG_CMD_SETEXPR is not set
CONFIG_NET_RANDOM_ETHADDR=y
CONFIG_SPL_OF_TRANSLATE=y
diff --git a/configs/theadorable_defconfig b/configs/theadorable_defconfig
index cce4669..7e01495 100644
--- a/configs/theadorable_defconfig
+++ b/configs/theadorable_defconfig
@@ -2,13 +2,13 @@ CONFIG_ARM=y
CONFIG_ARCH_MVEBU=y
CONFIG_SYS_MALLOC_F_LEN=0x2000
CONFIG_TARGET_THEADORABLE=y
+CONFIG_DM_GPIO=y
CONFIG_DEFAULT_DEVICE_TREE="armada-xp-theadorable"
# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
CONFIG_SPL=y
# CONFIG_CMD_IMLS is not set
# CONFIG_CMD_FLASH is not set
CONFIG_CMD_SF=y
-# CONFIG_CMD_FPGA is not set
# CONFIG_CMD_SETEXPR is not set
# CONFIG_CMD_NET is not set
# CONFIG_CMD_NFS is not set
diff --git a/include/configs/theadorable.h b/include/configs/theadorable.h
index cd9d6b6..5a14e84 100644
--- a/include/configs/theadorable.h
+++ b/include/configs/theadorable.h
@@ -115,6 +115,11 @@
#define CONFIG_VGA_AS_SINGLE_DEVICE
#define CONFIG_CMD_BMP
+/* FPGA programming support */
+#define CONFIG_FPGA
+#define CONFIG_FPGA_ALTERA
+#define CONFIG_FPGA_STRATIX_V
+
/*
* mv-common.h should be defined after CMD configs since it used them
* to enable certain macros
--
2.7.1
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