From patchwork Tue Sep 13 13:07:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ivan Bornyakov X-Patchwork-Id: 12974779 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C088DC54EE9 for ; Tue, 13 Sep 2022 13:10:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232154AbiIMNIx (ORCPT ); Tue, 13 Sep 2022 09:08:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32878 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232022AbiIMNIw (ORCPT ); Tue, 13 Sep 2022 09:08:52 -0400 Received: from mail.pr-group.ru (mail.pr-group.ru [178.18.215.3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 055A343310; Tue, 13 Sep 2022 06:08:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=metrotek.ru; s=mail; h=from:subject:date:message-id:to:cc:mime-version:content-transfer-encoding: in-reply-to:references; bh=deZPdUb1ANohgcKHOaXD5sI5XSVULNmaMmdmzrHJ3AQ=; b=VCW3fEKCULr+ryXWqBJUqyzv6vfMp4Wp2UkME0q0Xfb44sS9LZ0DMN6dRouR+hfu2CdDQUvKl3jE1 DjXdAQ1k7DONgKMw+/+P2+UdXLG6RgSZET5Z85xKkpednjy98bpINsk1YEjweFakcKIAqh0MtbJhIz I5zPIrsOECgwk2/qdnpx6sdQrzef87iKejCytkO+gKRhb0H4REPWY3ahZjcTt3XZTMc8oGzZSIJVAL m/fKgtEt/8Vjss5iZI6ClWBNS31UaCM+MIz9B4XUA9LSEKcdFqfx7hdZlwPvxaKyDVpXzNyFyM1DOh zlcnEod3X3eSs4WhiS5jKd/wUKi11BA== X-Kerio-Anti-Spam: Build: [Engines: 2.16.4.1445, Stamp: 3], Multi: [Enabled, t: (0.000014,0.070188)], BW: [Enabled, t: (0.000016,0.000001)], RTDA: [Enabled, t: (0.088653), Hit: No, Details: v2.41.0; Id: 15.52k2f9.1gcrfeo3m.75r; mclb], total: 0(700) X-Footer: bWV0cm90ZWsucnU= Received: from h-e2.ddg ([85.143.252.66]) (authenticated user i.bornyakov@metrotek.ru) by mail.pr-group.ru with ESMTPSA (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256 bits)); Tue, 13 Sep 2022 16:08:42 +0300 From: Ivan Bornyakov To: mdf@kernel.org, hao.wu@intel.com, yilun.xu@intel.com, trix@redhat.com, dg@emlix.com, j.zink@pengutronix.de, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org Cc: Ivan Bornyakov , linux-fpga@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de, system@metrotek.ru Subject: [PATCH v11 1/2] fpga: lattice-sysconfig-spi: add Lattice sysCONFIG FPGA manager Date: Tue, 13 Sep 2022 16:07:13 +0300 Message-Id: <20220913130714.31404-2-i.bornyakov@metrotek.ru> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20220913130714.31404-1-i.bornyakov@metrotek.ru> References: <20220913130714.31404-1-i.bornyakov@metrotek.ru> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fpga@vger.kernel.org Add support to the FPGA manager for programming Lattice ECP5 and MachXO2 FPGAs over slave SPI sysCONFIG interface. Signed-off-by: Ivan Bornyakov --- drivers/fpga/Kconfig | 7 + drivers/fpga/Makefile | 3 + drivers/fpga/sysconfig-spi.c | 210 ++++++++++++++ drivers/fpga/sysconfig.c | 528 +++++++++++++++++++++++++++++++++++ drivers/fpga/sysconfig.h | 62 ++++ 5 files changed, 810 insertions(+) create mode 100644 drivers/fpga/sysconfig-spi.c create mode 100644 drivers/fpga/sysconfig.c create mode 100644 drivers/fpga/sysconfig.h diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig index 6c416955da53..991d9d976dca 100644 --- a/drivers/fpga/Kconfig +++ b/drivers/fpga/Kconfig @@ -263,4 +263,11 @@ config FPGA_MGR_MICROCHIP_SPI programming over slave SPI interface with .dat formatted bitstream image. +config FPGA_MGR_LATTICE_SPI + tristate "Lattice sysCONFIG SPI FPGA manager" + depends on SPI + help + FPGA manager driver support for Lattice FPGAs programming over slave + SPI sysCONFIG interface. + endif # FPGA diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile index 42ae8b58abce..70e5f58d0c10 100644 --- a/drivers/fpga/Makefile +++ b/drivers/fpga/Makefile @@ -20,9 +20,12 @@ obj-$(CONFIG_FPGA_MGR_ZYNQ_FPGA) += zynq-fpga.o obj-$(CONFIG_FPGA_MGR_ZYNQMP_FPGA) += zynqmp-fpga.o obj-$(CONFIG_FPGA_MGR_VERSAL_FPGA) += versal-fpga.o obj-$(CONFIG_FPGA_MGR_MICROCHIP_SPI) += microchip-spi.o +obj-$(CONFIG_FPGA_MGR_LATTICE_SPI) += lattice-sysconfig-spi.o obj-$(CONFIG_ALTERA_PR_IP_CORE) += altera-pr-ip-core.o obj-$(CONFIG_ALTERA_PR_IP_CORE_PLAT) += altera-pr-ip-core-plat.o +lattice-sysconfig-spi-objs := sysconfig-spi.o sysconfig.o + # FPGA Secure Update Drivers obj-$(CONFIG_FPGA_M10_BMC_SEC_UPDATE) += intel-m10-bmc-sec-update.o diff --git a/drivers/fpga/sysconfig-spi.c b/drivers/fpga/sysconfig-spi.c new file mode 100644 index 000000000000..e2c71bc3b674 --- /dev/null +++ b/drivers/fpga/sysconfig-spi.c @@ -0,0 +1,210 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Lattice FPGA programming over slave SPI sysCONFIG interface. + */ + +#include +#include + +#include "sysconfig.h" + +struct sysconfig_spi_fpga_priv { + const struct sysconfig_fpga_priv *fpga_priv; + u32 max_speed_hz; +}; + +static const struct sysconfig_spi_fpga_priv ecp5_spi_data = { + .fpga_priv = &ecp5_data, + .max_speed_hz = 60000000, +}; + +static const struct sysconfig_spi_fpga_priv machxo2_spi_data = { + .fpga_priv = &machxo2_data, + .max_speed_hz = 66000000, +}; + +static int sysconfig_spi_cmd_write(struct sysconfig_priv *priv, + const void *tx_buf, size_t tx_len) +{ + struct spi_device *spi = to_spi_device(priv->dev); + + if (!spi) + return -ENODEV; + + return spi_write(spi, tx_buf, tx_len); +} + +static int sysconfig_spi_cmd_write_with_data(struct sysconfig_priv *priv, + const void *cmd, size_t cmd_len, + const void *data, size_t data_len) +{ + struct spi_device *spi = to_spi_device(priv->dev); + struct spi_transfer xfers[2] = { + { + .tx_buf = cmd, + .len = cmd_len, + }, { + .tx_buf = data, + .len = data_len, + }, + }; + + if (!spi) + return -ENODEV; + + return spi_sync_transfer(spi, xfers, 2); +} + +static int sysconfig_spi_cmd_write_then_read(struct sysconfig_priv *priv, + const void *tx_buf, size_t tx_len, + void *rx_buf, size_t rx_len) +{ + struct spi_device *spi = to_spi_device(priv->dev); + + if (!spi) + return -ENODEV; + + return spi_write_then_read(spi, tx_buf, tx_len, rx_buf, rx_len); +} + +static int sysconfig_spi_lsc_burst_init(struct sysconfig_priv *priv) +{ + const u8 lsc_bitstream_burst[] = SYSCONFIG_LSC_BITSTREAM_BURST; + struct spi_device *spi = to_spi_device(priv->dev); + struct spi_transfer xfer = { + .tx_buf = lsc_bitstream_burst, + .len = sizeof(lsc_bitstream_burst), + .cs_change = 1, + }; + struct spi_message msg; + int ret; + + if (!spi) + return -ENODEV; + + spi_message_init_with_transfers(&msg, &xfer, 1); + + /* + * Lock SPI bus for exclusive usage until FPGA programming is done. + * SPI bus will be released in sysconfig_spi_lsc_burst_complete(). + */ + spi_bus_lock(spi->controller); + + ret = spi_sync_locked(spi, &msg); + if (ret) + spi_bus_unlock(spi->controller); + + return ret; +} + +static int sysconfig_spi_bitstream_burst_write(struct sysconfig_priv *priv, + const char *buf, size_t count) +{ + struct spi_device *spi = to_spi_device(priv->dev); + struct spi_transfer xfer = { + .tx_buf = buf, + .len = count, + .cs_change = 1, + }; + struct spi_message msg; + + if (!spi) + return -ENODEV; + + spi_message_init_with_transfers(&msg, &xfer, 1); + + return spi_sync_locked(spi, &msg); +} + +static int sysconfig_spi_lsc_burst_complete(struct sysconfig_priv *priv) +{ + struct spi_device *spi = to_spi_device(priv->dev); + + if (!spi) + return -ENODEV; + + /* Bitstream burst write is done, release SPI bus */ + spi_bus_unlock(spi->controller); + + /* Toggle CS to finish bitstream write */ + return spi_write(spi, NULL, 0); +} + +static int sysconfig_spi_probe(struct spi_device *spi) +{ + const struct sysconfig_spi_fpga_priv *spi_fpga_priv; + const struct spi_device_id *dev_id; + struct device *dev = &spi->dev; + struct sysconfig_priv *priv; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + spi_fpga_priv = of_device_get_match_data(dev); + if (!spi_fpga_priv) { + dev_id = spi_get_device_id(spi); + if (!dev_id) + return -ENODEV; + + spi_fpga_priv = (const struct sysconfig_spi_fpga_priv *)dev_id->driver_data; + } + + if (!spi_fpga_priv) + return -EINVAL; + + if (spi->max_speed_hz > spi_fpga_priv->max_speed_hz) { + dev_err(dev, "SPI speed %u is too high, maximum speed is %u\n", + spi->max_speed_hz, spi_fpga_priv->max_speed_hz); + return -EINVAL; + } + + priv->dev = dev; + priv->fpga_priv = spi_fpga_priv->fpga_priv; + priv->command_write = sysconfig_spi_cmd_write; + priv->command_write_with_data = sysconfig_spi_cmd_write_with_data; + priv->command_write_then_read = sysconfig_spi_cmd_write_then_read; + priv->bitstream_burst_write_init = sysconfig_spi_lsc_burst_init; + priv->bitstream_burst_write = sysconfig_spi_bitstream_burst_write; + priv->bitstream_burst_write_complete = sysconfig_spi_lsc_burst_complete; + + return sysconfig_probe(priv); +} + +static const struct spi_device_id sysconfig_spi_ids[] = { + { + .name = "sysconfig-ecp5", + .driver_data = (kernel_ulong_t)&ecp5_spi_data, + }, { + .name = "sysconfig-machxo2", + .driver_data = (kernel_ulong_t)&machxo2_spi_data, + }, {}, +}; +MODULE_DEVICE_TABLE(spi, sysconfig_spi_ids); + +#if IS_ENABLED(CONFIG_OF) +static const struct of_device_id sysconfig_of_ids[] = { + { + .compatible = "lattice,sysconfig-ecp5", + .data = &ecp5_spi_data, + }, { + .compatible = "lattice,sysconfig-machxo2", + .data = &machxo2_spi_data, + }, {}, +}; +MODULE_DEVICE_TABLE(of, sysconfig_of_ids); +#endif /* IS_ENABLED(CONFIG_OF) */ + +static struct spi_driver lattice_sysconfig_driver = { + .probe = sysconfig_spi_probe, + .id_table = sysconfig_spi_ids, + .driver = { + .name = "lattice_sysconfig_spi_fpga_mgr", + .of_match_table = of_match_ptr(sysconfig_of_ids), + }, +}; + +module_spi_driver(lattice_sysconfig_driver); + +MODULE_DESCRIPTION("Lattice sysCONFIG Slave SPI FPGA Manager"); +MODULE_LICENSE("GPL"); diff --git a/drivers/fpga/sysconfig.c b/drivers/fpga/sysconfig.c new file mode 100644 index 000000000000..af697203ed5d --- /dev/null +++ b/drivers/fpga/sysconfig.c @@ -0,0 +1,528 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Lattice FPGA sysCONFIG interface functions independent of port type. + */ + +#include +#include +#include + +#include "sysconfig.h" + +const struct sysconfig_fpga_priv ecp5_data = { + .isc_enable_operand = 0x00, + .burst_write = true, + .internal_flash = false, +}; + +const struct sysconfig_fpga_priv machxo2_data = { + .isc_enable_operand = 0x08, + .burst_write = false, + .internal_flash = true, +}; + +static int sysconfig_cmd_write(struct sysconfig_priv *priv, const void *buf, + size_t buf_len) +{ + return priv->command_write(priv, buf, buf_len); +} + +static int sysconfig_cmd_write_with_data(struct sysconfig_priv *priv, + const void *cmd, size_t cmd_len, + const void *data, size_t data_len) +{ + return priv->command_write_with_data(priv, cmd, cmd_len, data, data_len); +} + +static int sysconfig_cmd_write_then_read(struct sysconfig_priv *priv, + const void *tx_buf, size_t tx_len, + void *rx_buf, size_t rx_len) +{ + return priv->command_write_then_read(priv, tx_buf, tx_len, rx_buf, rx_len); +} + +static int sysconfig_read_busy(struct sysconfig_priv *priv) +{ + const u8 lsc_check_busy[] = SYSCONFIG_LSC_CHECK_BUSY; + u8 busy; + int ret; + + ret = sysconfig_cmd_write_then_read(priv, lsc_check_busy, + sizeof(lsc_check_busy), + &busy, sizeof(busy)); + + return ret ? : busy; +} + +static int sysconfig_poll_busy(struct sysconfig_priv *priv) +{ + size_t retries = SYSCONFIG_POLL_RETRIES; + int ret; + + while (retries--) { + ret = sysconfig_read_busy(priv); + if (ret <= 0) + return ret; + + usleep_range(SYSCONFIG_POLL_INTERVAL_US, + SYSCONFIG_POLL_INTERVAL_US * 2); + } + + return -EBUSY; +} + +static int sysconfig_read_status(struct sysconfig_priv *priv, u32 *status) +{ + const u8 lsc_read_status[] = SYSCONFIG_LSC_READ_STATUS; + __be32 device_status; + int ret; + + ret = sysconfig_cmd_write_then_read(priv, lsc_read_status, + sizeof(lsc_read_status), + &device_status, + sizeof(device_status)); + if (ret) + return ret; + + *status = be32_to_cpu(device_status); + + return 0; +} + +static int sysconfig_poll_status(struct sysconfig_priv *priv, u32 *status) +{ + int ret = sysconfig_poll_busy(priv); + + if (ret) + return ret; + + return sysconfig_read_status(priv, status); +} + +static int sysconfig_poll_gpio(struct gpio_desc *gpio, bool is_active) +{ + size_t retries = SYSCONFIG_POLL_RETRIES; + int value; + + while (retries--) { + value = gpiod_get_value(gpio); + if (value < 0) + return value; + + if ((is_active && value) || (!is_active && !value)) + return 0; + } + + return -ETIMEDOUT; +} + +static int sysconfig_gpio_refresh(struct sysconfig_priv *priv) +{ + struct gpio_desc *program = priv->program; + struct gpio_desc *init = priv->init; + struct gpio_desc *done = priv->done; + int ret; + + /* Enter init mode */ + gpiod_set_value(program, 1); + + ret = sysconfig_poll_gpio(init, true); + if (!ret) + ret = sysconfig_poll_gpio(done, false); + + if (ret) + return ret; + + /* Enter program mode */ + gpiod_set_value(program, 0); + + return sysconfig_poll_gpio(init, false); +} + +static int sysconfig_lsc_refresh(struct sysconfig_priv *priv) +{ + static const u8 lsc_refresh[] = SYSCONFIG_LSC_REFRESH; + int ret; + + ret = sysconfig_cmd_write(priv, lsc_refresh, sizeof(lsc_refresh)); + if (ret) + return ret; + + usleep_range(4000, 8000); + + return 0; +} + +static int sysconfig_refresh(struct sysconfig_priv *priv) +{ + struct gpio_desc *program = priv->program; + struct gpio_desc *init = priv->init; + struct gpio_desc *done = priv->done; + + if (program && init && done) + return sysconfig_gpio_refresh(priv); + + return sysconfig_lsc_refresh(priv); +} + +static int sysconfig_isc_enable(struct sysconfig_priv *priv) +{ + const struct sysconfig_fpga_priv *fpga_priv = priv->fpga_priv; + u8 isc_enable[] = SYSCONFIG_ISC_ENABLE; + u32 status; + int ret; + + isc_enable[1] = fpga_priv->isc_enable_operand; + + ret = sysconfig_cmd_write(priv, isc_enable, sizeof(isc_enable)); + if (ret) + return ret; + + ret = sysconfig_poll_status(priv, &status); + if (ret || (status & SYSCONFIG_STATUS_FAIL)) + return ret ? : -EFAULT; + + return 0; +} + +static int sysconfig_isc_erase(struct sysconfig_priv *priv) +{ + const struct sysconfig_fpga_priv *fpga_priv = priv->fpga_priv; + u8 isc_erase[] = SYSCONFIG_ISC_ERASE; + u32 status; + int ret; + + isc_erase[1] = SYSCONFIG_ISC_ERASE_SRAM; + + if (fpga_priv->internal_flash) + isc_erase[1] |= SYSCONFIG_ISC_ERASE_FLASH; + + ret = sysconfig_cmd_write(priv, isc_erase, sizeof(isc_erase)); + if (ret) + return ret; + + ret = sysconfig_poll_status(priv, &status); + if (ret || (status & SYSCONFIG_STATUS_FAIL)) + return ret ? : -EFAULT; + + return 0; +} + +static int sysconfig_isc_init(struct sysconfig_priv *priv) +{ + int ret = sysconfig_isc_enable(priv); + + if (ret) + return ret; + + return sysconfig_isc_erase(priv); +} + +static int sysconfig_lsc_init_addr(struct sysconfig_priv *priv) +{ + const u8 lsc_init_addr[] = SYSCONFIG_LSC_INIT_ADDR; + + return sysconfig_cmd_write(priv, lsc_init_addr, sizeof(lsc_init_addr)); +} + +static int sysconfig_burst_write_init(struct sysconfig_priv *priv) +{ + if (priv->bitstream_burst_write_init) + return priv->bitstream_burst_write_init(priv); + + return 0; +} + +static int sysconfig_burst_write_complete(struct sysconfig_priv *priv) +{ + if (priv->bitstream_burst_write_complete) + return priv->bitstream_burst_write_complete(priv); + + return 0; +} + +static int sysconfig_bitstream_burst_write(struct sysconfig_priv *priv, + const char *buf, size_t count) +{ + int ret; + + if (priv->bitstream_burst_write) + ret = priv->bitstream_burst_write(priv, buf, count); + else + ret = -EOPNOTSUPP; + + if (ret) + sysconfig_burst_write_complete(priv); + + return ret; +} + +static int sysconfig_bitstream_paged_write(struct sysconfig_priv *priv, + const char *buf, size_t count) +{ + const u8 lsc_progincr[] = SYSCONFIG_LSC_PROG_INCR_NV; + size_t i; + int ret; + + if (count % SYSCONFIG_PAGE_SIZE) + return -EINVAL; + + for (i = 0; i < count; i += SYSCONFIG_PAGE_SIZE) { + ret = sysconfig_cmd_write_with_data(priv, lsc_progincr, + sizeof(lsc_progincr), + buf + i, SYSCONFIG_PAGE_SIZE); + if (!ret) + ret = sysconfig_poll_busy(priv); + + if (ret) + break; + } + + return ret; +} + +static int sysconfig_isc_prog_done(struct sysconfig_priv *priv) +{ + const u8 isc_prog_done[] = SYSCONFIG_ISC_PROGRAM_DONE; + u32 status; + int ret; + + ret = sysconfig_cmd_write(priv, isc_prog_done, sizeof(isc_prog_done)); + if (ret) + return ret; + + ret = sysconfig_poll_status(priv, &status); + if (ret) + return ret; + + if (status & SYSCONFIG_STATUS_DONE) + return 0; + + return -EFAULT; +} + +static int sysconfig_isc_disable(struct sysconfig_priv *priv) +{ + const u8 isc_disable[] = SYSCONFIG_ISC_DISABLE; + + return sysconfig_cmd_write(priv, isc_disable, sizeof(isc_disable)); +} + +static void sysconfig_cleanup(struct sysconfig_priv *priv) +{ + sysconfig_isc_erase(priv); + sysconfig_refresh(priv); +} + +static int sysconfig_isc_finish(struct sysconfig_priv *priv) +{ + const struct sysconfig_fpga_priv *fpga_priv = priv->fpga_priv; + int ret, retries = SYSCONFIG_REFRESH_RETRIES; + struct gpio_desc *done_gpio = priv->done; + u32 status; + + if (done_gpio) { + ret = sysconfig_isc_disable(priv); + if (ret) + return ret; + + return sysconfig_poll_gpio(done_gpio, true); + } + + while (retries--) { + ret = sysconfig_poll_status(priv, &status); + if (ret) + break; + + if ((status & SYSCONFIG_STATUS_DONE) && + !(status & SYSCONFIG_STATUS_BUSY) && + !(status & SYSCONFIG_STATUS_ERR)) { + return sysconfig_isc_disable(priv); + } + + if (fpga_priv->internal_flash) { + ret = sysconfig_refresh(priv); + if (ret) + break; + } + } + + return -EFAULT; +} + +static enum fpga_mgr_states sysconfig_ops_state(struct fpga_manager *mgr) +{ + struct sysconfig_priv *priv = mgr->priv; + struct gpio_desc *done = priv->done; + u32 status; + int ret; + + if (done && (gpiod_get_value(done) > 0)) + return FPGA_MGR_STATE_OPERATING; + + ret = sysconfig_read_status(priv, &status); + if (!ret && (status & SYSCONFIG_STATUS_DONE)) + return FPGA_MGR_STATE_OPERATING; + + return FPGA_MGR_STATE_UNKNOWN; +} + +static int sysconfig_ops_write_init(struct fpga_manager *mgr, + struct fpga_image_info *info, + const char *buf, size_t count) +{ + const struct sysconfig_fpga_priv *fpga_priv; + struct sysconfig_priv *priv; + struct device *dev; + int ret; + + dev = &mgr->dev; + priv = mgr->priv; + fpga_priv = priv->fpga_priv; + + if (info->flags & FPGA_MGR_PARTIAL_RECONFIG) { + dev_err(dev, "Partial reconfiguration is not supported\n"); + return -EOPNOTSUPP; + } + + if (!fpga_priv->internal_flash) { + /* Write directly to SRAM */ + ret = sysconfig_refresh(priv); + if (ret) { + dev_err(dev, "Failed to go to program mode\n"); + return ret; + } + } + + /* Enter ISC mode */ + ret = sysconfig_isc_init(priv); + if (ret) { + dev_err(dev, "Failed to go to ISC mode\n"); + return ret; + } + + /* Initialize the Address Shift Register */ + ret = sysconfig_lsc_init_addr(priv); + if (ret) { + dev_err(dev, + "Failed to initialize the Address Shift Register\n"); + return ret; + } + + if (fpga_priv->burst_write) { + /* Prepare for bitstream burst write */ + ret = sysconfig_burst_write_init(priv); + if (ret) + dev_err(dev, + "Failed to prepare for bitstream burst write\n"); + } + + return ret; +} + +static int sysconfig_ops_write(struct fpga_manager *mgr, const char *buf, + size_t count) +{ + const struct sysconfig_fpga_priv *fpga_priv; + struct sysconfig_priv *priv; + + priv = mgr->priv; + fpga_priv = priv->fpga_priv; + + if (fpga_priv->burst_write) + return sysconfig_bitstream_burst_write(priv, buf, count); + + return sysconfig_bitstream_paged_write(priv, buf, count); +} + +static int sysconfig_ops_write_complete(struct fpga_manager *mgr, + struct fpga_image_info *info) +{ + const struct sysconfig_fpga_priv *fpga_priv; + struct sysconfig_priv *priv; + struct device *dev; + int ret; + + dev = &mgr->dev; + priv = mgr->priv; + fpga_priv = priv->fpga_priv; + + if (fpga_priv->burst_write) { + ret = sysconfig_burst_write_complete(priv); + if (!ret) + ret = sysconfig_poll_busy(priv); + + if (ret) { + dev_err(dev, + "Error while waiting bitstream write to finish\n"); + goto fail; + } + } + + if (fpga_priv->internal_flash) { + ret = sysconfig_isc_prog_done(priv); + if (!ret) + ret = sysconfig_refresh(priv); + + if (ret) { + dev_err(dev, "Failed to enable Self-Download Mode\n"); + goto fail; + } + } + + ret = sysconfig_isc_finish(priv); + +fail: + if (ret) + sysconfig_cleanup(priv); + + return ret; +} + +static const struct fpga_manager_ops sysconfig_fpga_mgr_ops = { + .state = sysconfig_ops_state, + .write_init = sysconfig_ops_write_init, + .write = sysconfig_ops_write, + .write_complete = sysconfig_ops_write_complete, +}; + +int sysconfig_probe(struct sysconfig_priv *priv) +{ + struct gpio_desc *program, *init, *done; + struct device *dev = priv->dev; + struct fpga_manager *mgr; + int ret; + + if (!dev) + return -ENODEV; + + program = devm_gpiod_get_optional(dev, "program", GPIOD_OUT_LOW); + if (IS_ERR(program)) { + ret = PTR_ERR(program); + dev_err(dev, "Failed to get PROGRAM GPIO: %d\n", ret); + return ret; + } + + init = devm_gpiod_get_optional(dev, "init", GPIOD_IN); + if (IS_ERR(init)) { + ret = PTR_ERR(init); + dev_err(dev, "Failed to get INIT GPIO: %d\n", ret); + return ret; + } + + done = devm_gpiod_get_optional(dev, "done", GPIOD_IN); + if (IS_ERR(done)) { + ret = PTR_ERR(done); + dev_err(dev, "Failed to get DONE GPIO: %d\n", ret); + return ret; + } + + priv->program = program; + priv->init = init; + priv->done = done; + + mgr = devm_fpga_mgr_register(dev, "Lattice sysCONFIG FPGA Manager", + &sysconfig_fpga_mgr_ops, priv); + + return PTR_ERR_OR_ZERO(mgr); +} diff --git a/drivers/fpga/sysconfig.h b/drivers/fpga/sysconfig.h new file mode 100644 index 000000000000..decb0958ee51 --- /dev/null +++ b/drivers/fpga/sysconfig.h @@ -0,0 +1,62 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __LATTICE_SYSCONFIG_H +#define __LATTICE_SYSCONFIG_H + +#define SYSCONFIG_ISC_ENABLE {0xC6, 0x00, 0x00, 0x00} +#define SYSCONFIG_ISC_DISABLE {0x26, 0x00, 0x00, 0x00} +#define SYSCONFIG_ISC_ERASE {0x0E, 0x00, 0x00, 0x00} +#define SYSCONFIG_ISC_PROGRAM_DONE {0x5E, 0x00, 0x00, 0x00} +#define SYSCONFIG_LSC_READ_STATUS {0x3C, 0x00, 0x00, 0x00} +#define SYSCONFIG_LSC_CHECK_BUSY {0xF0, 0x00, 0x00, 0x00} +#define SYSCONFIG_LSC_REFRESH {0x79, 0x00, 0x00, 0x00} +#define SYSCONFIG_LSC_INIT_ADDR {0x46, 0x00, 0x00, 0x00} +#define SYSCONFIG_LSC_BITSTREAM_BURST {0x7a, 0x00, 0x00, 0x00} +#define SYSCONFIG_LSC_PROG_INCR_NV {0x70, 0x00, 0x00, 0x01} + +#define SYSCONFIG_ISC_ERASE_SRAM BIT(0) +#define SYSCONFIG_ISC_ERASE_FLASH BIT(2) + +#define SYSCONFIG_STATUS_DONE BIT(8) +#define SYSCONFIG_STATUS_BUSY BIT(12) +#define SYSCONFIG_STATUS_FAIL BIT(13) +#define SYSCONFIG_STATUS_ERR (BIT(23) | BIT(24) | BIT(25)) + +#define SYSCONFIG_REFRESH_RETRIES 16 +#define SYSCONFIG_POLL_RETRIES 1000000 +#define SYSCONFIG_POLL_INTERVAL_US 30 + +#define SYSCONFIG_PAGE_SIZE 16 + +struct sysconfig_fpga_priv { + u8 isc_enable_operand; + bool burst_write; + bool internal_flash; +}; + +extern const struct sysconfig_fpga_priv ecp5_data; +extern const struct sysconfig_fpga_priv machxo2_data; + +struct sysconfig_priv { + const struct sysconfig_fpga_priv *fpga_priv; + struct gpio_desc *program; + struct gpio_desc *init; + struct gpio_desc *done; + struct device *dev; + int (*command_write)(struct sysconfig_priv *priv, + const void *tx_buf, size_t tx_len); + int (*command_write_with_data)(struct sysconfig_priv *priv, + const void *cmd_buf, size_t cmd_len, + const void *data_buf, size_t data_len); + int (*command_write_then_read)(struct sysconfig_priv *priv, + const void *tx_buf, size_t tx_len, + void *rx_buf, size_t rx_len); + int (*bitstream_burst_write_init)(struct sysconfig_priv *priv); + int (*bitstream_burst_write)(struct sysconfig_priv *priv, + const char *tx_buf, size_t tx_len); + int (*bitstream_burst_write_complete)(struct sysconfig_priv *priv); +}; + +int sysconfig_probe(struct sysconfig_priv *priv); + +#endif /* __LATTICE_SYSCONFIG_H */