Firmware: socfpga: Add SoCFPGA FPGA program support

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 444 insertions, 0 deletions

diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 28a173b63f..5866063251 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -8,4 +8,7 @@ config FIRMWARE_ALTERA_SERIAL
 	  Programming an Altera FPGA via a few GPIOs for the control lines and
 	  MOSI, MISO and clock from an SPI interface for the data lines
 
+config FIRMWARE_ALTERA_SOCFPGA
+	bool "Altera SoCFPGA fpga loader"
+
 endmenu
diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile
index ec6a5a1708..c3a3c34004 100644
--- a/drivers/firmware/Makefile
+++ b/drivers/firmware/Makefile
@@ -1 +1,2 @@
 obj-$(CONFIG_FIRMWARE_ALTERA_SERIAL) += altera_serial.o
+obj-$(CONFIG_FIRMWARE_ALTERA_SOCFPGA) += socfpga.o
diff --git a/drivers/firmware/socfpga.c b/drivers/firmware/socfpga.c
new file mode 100644
index 0000000000..a5dc6072aa
--- /dev/null
+++ b/drivers/firmware/socfpga.c
@@ -0,0 +1,440 @@
+/*
+ *
+ * Copyright (C) 2012 Altera Corporation <www.altera.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of the Altera Corporation nor the
+ *    names of its contributors may be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL ALTERA CORPORATION BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <firmware.h>
+#include <command.h>
+#include <common.h>
+#include <malloc.h>
+#include <clock.h>
+#include <fcntl.h>
+#include <init.h>
+#include <io.h>
+#include <mach/system-manager.h>
+#include <mach/reset-manager.h>
+#include <mach/socfpga-regs.h>
+#include <mach/sdram.h>
+
+#define FPGAMGRREGS_STAT			0x0
+#define FPGAMGRREGS_CTRL			0x4
+#define FPGAMGRREGS_DCLKCNT			0x8
+#define FPGAMGRREGS_DCLKSTAT			0xc
+
+#define FPGAMGRREGS_MON_GPIO_PORTA_EOI_ADDRESS	0x84c
+#define FPGAMGRREGS_MON_GPIO_EXT_PORTA_ADDRESS	0x850
+
+#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_STAT_MODE_MASK		0x7
+#define FPGAMGRREGS_STAT_MSEL_MASK		0xf8
+#define FPGAMGRREGS_STAT_MSEL_LSB		3
+
+#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
+
+struct fpgamgr {
+	struct firmware_handler fh;
+	struct device_d *dev;
+	void __iomem *regs;
+	void __iomem *regs_data;
+};
+
+/* Get the FPGA mode */
+static uint32_t fpgamgr_get_mode(struct fpgamgr *mgr)
+{
+	return readl(mgr->regs + FPGAMGRREGS_STAT) & FPGAMGRREGS_STAT_MODE_MASK;
+}
+
+static int fpgamgr_dclkcnt_set(struct fpgamgr *mgr, unsigned long cnt)
+{
+	uint64_t start;
+
+	/* clear any existing done status */
+	if (readl(mgr->regs + FPGAMGRREGS_DCLKSTAT))
+		writel(0x1, mgr->regs + FPGAMGRREGS_DCLKSTAT);
+
+	writel(cnt, mgr->regs + FPGAMGRREGS_DCLKCNT);
+
+	/* wait till the dclkcnt done */
+	start = get_time_ns();
+	while (1) {
+		if (readl(mgr->regs + FPGAMGRREGS_DCLKSTAT)) {
+			writel(0x1, mgr->regs + FPGAMGRREGS_DCLKSTAT);
+			return 0;
+		}
+
+		if (is_timeout(start, 100 * MSECOND))
+			return -ETIMEDOUT;
+	}
+}
+
+/* Start the FPGA programming by initialize the FPGA Manager */
+static int fpgamgr_program_init(struct fpgamgr *mgr)
+{
+	unsigned long reg;
+	uint32_t ctrl = 0, ratio;
+	uint64_t start;
+
+	/* get the MSEL value */
+	reg = readl(mgr->regs + FPGAMGRREGS_STAT);
+	reg = ((reg & FPGAMGRREGS_STAT_MSEL_MASK) >> FPGAMGRREGS_STAT_MSEL_LSB);
+
+	if (reg & 0x8)
+		ctrl |= FPGAMGRREGS_CTRL_CFGWDTH_MASK;
+	else
+		ctrl &= ~FPGAMGRREGS_CTRL_CFGWDTH_MASK;
+
+	switch (reg & 0xb) {
+	case 0xa:
+		ratio = CDRATIO_x8;
+		break;
+	case 0x2:
+	case 0x9:
+		ratio = CDRATIO_x4;
+		break;
+	case 0x1:
+		ratio = CDRATIO_x2;
+		break;
+	case 0x8:
+	case 0xb:
+	default:
+		ratio = CDRATIO_x1;
+		break;
+	}
+
+	ctrl |= ratio << FPGAMGRREGS_CTRL_CDRATIO_LSB;
+
+	/* clear nce bit to allow HPS configuration */
+	ctrl &= ~FPGAMGRREGS_CTRL_NCE_MASK;
+
+	/* to enable FPGA Manager drive over configuration line */
+	ctrl |= FPGAMGRREGS_CTRL_EN_MASK;
+
+	/* put FPGA into reset phase */
+	ctrl |= FPGAMGRREGS_CTRL_NCONFIGPULL_MASK;
+
+	writel(ctrl, mgr->regs + FPGAMGRREGS_CTRL);
+
+	/* (1) wait until FPGA enter reset phase */
+	start = get_time_ns();
+	while (1) {
+		if (fpgamgr_get_mode(mgr) == FPGAMGRREGS_MODE_RESETPHASE)
+			break;
+		if (is_timeout(start, 100 * MSECOND))
+			return -ETIMEDOUT;
+	}
+
+	/* release FPGA from reset phase */
+	ctrl = readl(mgr->regs + FPGAMGRREGS_CTRL);
+	ctrl &= ~FPGAMGRREGS_CTRL_NCONFIGPULL_MASK;
+	writel(ctrl, mgr->regs + FPGAMGRREGS_CTRL);
+
+	/* (2) wait until FPGA enter configuration phase */
+	start = get_time_ns();
+	while (1) {
+		if (fpgamgr_get_mode(mgr) == FPGAMGRREGS_MODE_CFGPHASE)
+			break;
+		if (is_timeout(start, 100 * MSECOND))
+			return -ETIMEDOUT;
+	}
+
+	/* clear all interrupt in CB Monitor */
+	writel(0xFFF, (mgr->regs + FPGAMGRREGS_MON_GPIO_PORTA_EOI_ADDRESS));
+
+	/* enable AXI configuration */
+	ctrl = readl(mgr->regs + FPGAMGRREGS_CTRL);
+	ctrl |= FPGAMGRREGS_CTRL_AXICFGEN_MASK;
+	writel(ctrl, mgr->regs + FPGAMGRREGS_CTRL);
+
+	return 0;
+}
+
+/* Ensure the FPGA entering config done */
+static int fpgamgr_program_poll_cd(struct fpgamgr *mgr)
+{
+	unsigned long reg;
+	uint32_t val;
+	uint64_t start;
+
+	/* (3) wait until full config done */
+	start = get_time_ns();
+	while (1) {
+		reg = readl(mgr->regs + FPGAMGRREGS_MON_GPIO_EXT_PORTA_ADDRESS);
+
+		/* config error */
+		if (!(reg & FPGAMGRREGS_MON_GPIO_EXT_PORTA_NS_MASK) &&
+			!(reg & FPGAMGRREGS_MON_GPIO_EXT_PORTA_CD_MASK))
+			return -EIO;
+
+		/* config done without error */
+		if ((reg & FPGAMGRREGS_MON_GPIO_EXT_PORTA_NS_MASK) &&
+			(reg & FPGAMGRREGS_MON_GPIO_EXT_PORTA_CD_MASK))
+			break;
+
+		if (is_timeout(start, 100 * MSECOND))
+			return -ETIMEDOUT;
+	}
+
+	/* disable AXI configuration */
+	val = readl(mgr->regs + FPGAMGRREGS_CTRL);
+	val &= ~FPGAMGRREGS_CTRL_AXICFGEN_MASK;
+	writel(val, mgr->regs + FPGAMGRREGS_CTRL);
+
+	return 0;
+}
+
+/* Ensure the FPGA entering init phase */
+static int fpgamgr_program_poll_initphase(struct fpgamgr *mgr)
+{
+	uint64_t start;
+
+	/* additional clocks for the CB to enter initialization phase */
+	if (fpgamgr_dclkcnt_set(mgr, 0x4) != 0)
+		return -5;
+
+	/* (4) wait until FPGA enter init phase or user mode */
+	start = get_time_ns();
+	while (1) {
+		int mode = fpgamgr_get_mode(mgr);
+
+		if (mode == FPGAMGRREGS_MODE_INITPHASE ||
+				mode == FPGAMGRREGS_MODE_USERMODE)
+			break;
+
+		if (is_timeout(start, 100 * MSECOND))
+			return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+/* Ensure the FPGA entering user mode */
+static int fpgamgr_program_poll_usermode(struct fpgamgr *mgr)
+{
+	uint32_t val;
+	uint64_t start;
+
+	/* additional clocks for the CB to exit initialization phase */
+	if (fpgamgr_dclkcnt_set(mgr, 0x5000) != 0)
+		return -7;
+
+	/* (5) wait until FPGA enter user mode */
+	start = get_time_ns();
+	while (1) {
+		if (fpgamgr_get_mode(mgr) == FPGAMGRREGS_MODE_USERMODE)
+			break;
+		if (is_timeout(start, 100 * MSECOND))
+			return -ETIMEDOUT;
+	}
+
+	/* to release FPGA Manager drive over configuration line */
+	val = readl(mgr->regs + FPGAMGRREGS_CTRL);
+	val &= ~FPGAMGRREGS_CTRL_EN_MASK;
+	writel(val, mgr->regs + FPGAMGRREGS_CTRL);
+
+	return 0;
+}
+
+/*
+ * Using FPGA Manager to program the FPGA
+ * Return 0 for sucess
+ */
+static int fpgamgr_program_start(struct firmware_handler *fh)
+{
+	struct fpgamgr *mgr = container_of(fh, struct fpgamgr, fh);
+	int status;
+
+	/* prior programming the FPGA, all bridges need to be shut off */
+
+	/* disable all signals from hps peripheral controller to fpga */
+	writel(0, SYSMGR_FPGAINTF_MODULE);
+
+	/* disable all signals from fpga to hps sdram */
+	writel(0, (CYCLONE5_SDR_ADDRESS + SDR_CTRLGRP_FPGAPORTRST_ADDRESS));
+
+	/* disable all axi bridge (hps2fpga, lwhps2fpga & fpga2hps) */
+	writel(~0, CYCLONE5_RSTMGR_ADDRESS + RESET_MGR_BRG_MOD_RESET_OFS);
+
+	/* unmap the bridges from NIC-301 */
+	writel(0x1, CYCLONE5_L3REGS_ADDRESS);
+
+	dev_dbg(mgr->dev, "start programming...\n");
+
+	/* initialize the FPGA Manager */
+	status = fpgamgr_program_init(mgr);
+	if (status) {
+		dev_err(mgr->dev, "program init failed with: %s\n",
+				strerror(-status));
+		return status;
+	}
+
+	return 0;
+}
+
+/* Write the RBF data to FPGA Manager */
+static int fpgamgr_program_write_buf(struct firmware_handler *fh, const void *buf,
+		size_t size)
+{
+	struct fpgamgr *mgr = container_of(fh, struct fpgamgr, fh);
+	const uint32_t *buf32 = buf;
+
+	/* write to FPGA Manager AXI data */
+	while (size) {
+		writel(*buf32, mgr->regs_data);
+		readl(mgr->regs + FPGAMGRREGS_MON_GPIO_EXT_PORTA_ADDRESS);
+		buf32++;
+		size -= sizeof(uint32_t);
+	}
+
+	return 0;
+}
+
+static int fpgamgr_program_finish(struct firmware_handler *fh)
+{
+	struct fpgamgr *mgr = container_of(fh, struct fpgamgr, fh);
+	int status;
+
+	/* Ensure the FPGA entering config done */
+	status = fpgamgr_program_poll_cd(mgr);
+	if (status) {
+		dev_err(mgr->dev, "poll for config done failed with: %s\n",
+				strerror(-status));
+		return status;
+	}
+
+	dev_dbg(mgr->dev, "waiting for init phase...\n");
+
+	/* Ensure the FPGA entering init phase */
+	status = fpgamgr_program_poll_initphase(mgr);
+	if (status) {
+		dev_err(mgr->dev, "poll for init phase failed with: %s\n",
+				strerror(-status));
+		return status;
+	}
+
+	dev_dbg(mgr->dev, "waiting for user mode...\n");
+
+	/* Ensure the FPGA entering user mode */
+	status = fpgamgr_program_poll_usermode(mgr);
+	if (status) {
+		dev_err(mgr->dev, "poll for user mode with: %s\n",
+				strerror(-status));
+		return status;
+	}
+
+	return 0;
+}
+
+static int fpgamgr_probe(struct device_d *dev)
+{
+	struct fpgamgr *mgr;
+	struct firmware_handler *fh;
+	const char *alias = of_alias_get(dev->device_node);
+	const char *model = NULL;
+	int ret;
+
+	dev_dbg(dev, "Probing FPGA firmware programmer\n");
+
+	mgr = xzalloc(sizeof(*mgr));
+	fh = &mgr->fh;
+
+	mgr->regs = dev_request_mem_region(dev, 0);
+	if (!mgr->regs) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	mgr->regs_data = dev_request_mem_region(dev, 1);
+	if (!mgr->regs_data) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	if (alias)
+		fh->id = xstrdup(alias);
+	else
+		fh->id = xstrdup("socfpga-fpga");
+
+	fh->open = fpgamgr_program_start;
+	fh->write = fpgamgr_program_write_buf;
+	fh->close = fpgamgr_program_finish;
+	of_property_read_string(dev->device_node, "compatible", &model);
+	if (model)
+		fh->model = xstrdup(model);
+	fh->dev = dev;
+
+	mgr->dev = dev;
+
+	dev_dbg(dev, "Registering FPGA firmware programmer\n");
+
+	ret = firmwaremgr_register(fh);
+	if (ret != 0) {
+		free(mgr);
+		goto out;
+	}
+
+	return 0;
+out:
+	free(fh->id);
+	free(mgr);
+
+	return ret;
+}
+
+static struct of_device_id fpgamgr_id_table[] = {
+	{
+		.compatible = "altr,socfpga-fpga-mgr",
+	},
+};
+
+static struct driver_d fpgamgr_driver = {
+	.name = "socfpa-fpgamgr",
+	.of_compatible = DRV_OF_COMPAT(fpgamgr_id_table),
+	.probe = fpgamgr_probe,
+};
+device_platform_driver(fpgamgr_driver);