From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XQvGU-0007Mp-Td for barebox@lists.infradead.org; Mon, 08 Sep 2014 09:29:42 +0000 From: Steffen Trumtrar Date: Mon, 8 Sep 2014 11:29:10 +0200 Message-Id: <1410168551-6588-5-git-send-email-s.trumtrar@pengutronix.de> In-Reply-To: <1410168551-6588-1-git-send-email-s.trumtrar@pengutronix.de> References: <1410168551-6588-1-git-send-email-s.trumtrar@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v4 4/5] Firmware: socfpga: Add SoCFPGA FPGA program support To: barebox@lists.infradead.org From: Sascha Hauer Signed-off-by: Sascha Hauer --- arch/arm/dts/socfpga.dtsi | 6 + arch/arm/mach-socfpga/Makefile | 1 + arch/arm/mach-socfpga/include/mach/socfpga-regs.h | 2 + drivers/firmware/Kconfig | 3 + drivers/firmware/Makefile | 1 + drivers/firmware/socfpga.c | 440 ++++++++++++++++++++++ 6 files changed, 453 insertions(+) create mode 100644 drivers/firmware/socfpga.c diff --git a/arch/arm/dts/socfpga.dtsi b/arch/arm/dts/socfpga.dtsi index 3368b459d030..afac867c991d 100644 --- a/arch/arm/dts/socfpga.dtsi +++ b/arch/arm/dts/socfpga.dtsi @@ -465,6 +465,12 @@ status = "disabled"; }; + fpgamgr@ff706000 { + compatible = "altr,socfpga-fpga-mgr"; + reg = <0xff706000 0x1000>, + <0xffb90000 0x1000>; + }; + gpio0: gpio@ff708000 { compatible = "snps,dw-apb-gpio"; reg = <0xff708000 0x1000>; diff --git a/arch/arm/mach-socfpga/Makefile b/arch/arm/mach-socfpga/Makefile index d8bf0674306e..12585c547673 100644 --- a/arch/arm/mach-socfpga/Makefile +++ b/arch/arm/mach-socfpga/Makefile @@ -2,3 +2,4 @@ obj-y += generic.o nic301.o bootsource.o reset-manager.o pbl-y += init.o freeze-controller.o scan-manager.o system-manager.o pbl-y += clock-manager.o iocsr-config-cyclone5.o obj-$(CONFIG_ARCH_SOCFPGA_XLOAD) += xload.o +obj-$(CONFIG_ARCH_SOCFPGA_FPGA) += fpga.o diff --git a/arch/arm/mach-socfpga/include/mach/socfpga-regs.h b/arch/arm/mach-socfpga/include/mach/socfpga-regs.h index 9d1e677cb736..b124ed675cfc 100644 --- a/arch/arm/mach-socfpga/include/mach/socfpga-regs.h +++ b/arch/arm/mach-socfpga/include/mach/socfpga-regs.h @@ -2,10 +2,12 @@ #define __MACH_SOCFPGA_REGS_H #define CYCLONE5_SDMMC_ADDRESS 0xff704000 +#define CYCLONE5_FPGAMGRREGS_ADDRESS 0xff706000 #define CYCLONE5_GPIO0_BASE 0xff708000 #define CYCLONE5_GPIO1_BASE 0xff709000 #define CYCLONE5_GPIO2_BASE 0xff70A000 #define CYCLONE5_L3REGS_ADDRESS 0xff800000 +#define CYCLONE5_FPGAMGRDATA_ADDRESS 0xffb90000 #define CYCLONE5_UART0_ADDRESS 0xffc02000 #define CYCLONE5_UART1_ADDRESS 0xffc03000 #define CYCLONE5_SDR_ADDRESS 0xffc20000 diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index 28a173b63f2a..58660632519e 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 ec6a5a17083d..c3a3c3400485 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 000000000000..a5dc6072aab4 --- /dev/null +++ b/drivers/firmware/socfpga.c @@ -0,0 +1,440 @@ +/* + * + * Copyright (C) 2012 Altera Corporation + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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); -- 2.1.0 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox