From mboxrd@z Thu Jan 1 00:00:00 1970 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 1BD8AECAAD4 for ; Mon, 29 Aug 2022 12:30:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229891AbiH2M3c (ORCPT ); Mon, 29 Aug 2022 08:29:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41272 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229679AbiH2M3N (ORCPT ); Mon, 29 Aug 2022 08:29:13 -0400 Received: from mail.pr-group.ru (mail.pr-group.ru [178.18.215.3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8C19D65CE; Mon, 29 Aug 2022 05:13:05 -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-type:in-reply-to: references; bh=ndJRAHPSStG9ti7V2Hi/JOarZ+ryzpdgNSaAj1FBKKQ=; b=B/WfUzl+CWEzCs8A68sck6XTuyTre2WkrrQD7MvDgqxGgqQqcZuxkKBkt334sLX9Bi+vceN6U7lbB 8Ll9LqLN2pq4NcMQG3c9jdVIRADC2Tr/7OFGDieuFtSbXlAN0ZEsjIuX7uHDZNBeLlRMXeIbbu/yOr tY1Ma4xt/FooZBABdf6Mm3fVZKPdTxYBYU+Gqr7Lvpy2Dny50ZXwOEzyWJtKtwVQtJzVkUhGsx5YM1 4tTog8q3sBB0lk3DAEFzluuGz9zpujGoqdkqc0VUOXBQopq8gysIn/ogqBBkGGyZMtYn+DLuLlHqlf 25HmveseUds7W5VbDISkK9E66AuIy7Q== X-Kerio-Anti-Spam: Build: [Engines: 2.16.4.1445, Stamp: 3], Multi: [Enabled, t: (0.000014,0.071749)], BW: [Enabled, t: (0.000014,0.000001)], RTDA: [Enabled, t: (0.087954), Hit: No, Details: v2.41.0; Id: 15.52k084.1gbkkp236.3g2; 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)); Mon, 29 Aug 2022 14:11:20 +0300 Date: Mon, 29 Aug 2022 14:10:21 +0300 From: Ivan Bornyakov To: Xu Yilun Cc: mdf@kernel.org, hao.wu@intel.com, trix@redhat.com, dg@emlix.com, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, linux-fpga@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, system@metrotek.ru Subject: Re: [PATCH v8 1/2] fpga: lattice-sysconfig-spi: add Lattice sysCONFIG FPGA manager Message-ID: <20220829111021.ee4457xdzzqsxkiw@h-e2.ddg> References: <20220825112433.14583-1-i.bornyakov@metrotek.ru> <20220825112433.14583-2-i.bornyakov@metrotek.ru> <20220829082740.glbcu5464zs3hceh@h-e2.ddg> <20220829110410.uyw5z37guwfb4pyf@h-e2.ddg> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220829110410.uyw5z37guwfb4pyf@h-e2.ddg> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 29, 2022 at 02:04:10PM +0300, Ivan Bornyakov wrote: > On Mon, Aug 29, 2022 at 06:34:44PM +0800, Xu Yilun wrote: > > On 2022-08-29 at 11:27:40 +0300, Ivan Bornyakov wrote: > > > On Mon, Aug 29, 2022 at 03:25:41PM +0800, Xu Yilun wrote: > > > > On 2022-08-25 at 14:24:32 +0300, Ivan Bornyakov wrote: > > > > > 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 | 1 + > > > > > drivers/fpga/lattice-sysconfig-spi.c | 630 +++++++++++++++++++++++++++ > > > > > 3 files changed, 638 insertions(+) > > > > > create mode 100644 drivers/fpga/lattice-sysconfig-spi.c > > > > > > > > > > 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..115dba916024 100644 > > > > > --- a/drivers/fpga/Makefile > > > > > +++ b/drivers/fpga/Makefile > > > > > @@ -20,6 +20,7 @@ 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 > > > > > > > > > > diff --git a/drivers/fpga/lattice-sysconfig-spi.c b/drivers/fpga/lattice-sysconfig-spi.c > > > > > new file mode 100644 > > > > > index 000000000000..145b5b27b88d > > > > > --- /dev/null > > > > > +++ b/drivers/fpga/lattice-sysconfig-spi.c > > > > > @@ -0,0 +1,630 @@ > > > > > +// SPDX-License-Identifier: GPL-2.0 > > > > > +/* > > > > > + * Lattice FPGA programming over slave SPI sysCONFIG interface. > > > > > + */ > > > > > + > > > > > +#include > > > > > +#include > > > > > +#include > > > > > +#include > > > > > + > > > > > +#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_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_POLL_RETRIES 100000 > > > > > + > > > > > +#define ECP5_SPI_MAX_SPEED_HZ 60000000 > > > > > +#define ECP5_ISC_ERASE_OPERAND 0x01 > > > > > + > > > > > +#define MACHXO2_SPI_MAX_SPEED_HZ 66000000 > > > > > +#define MACHXO2_PAGE_SIZE 16 > > > > > +#define MACHXO2_ISC_ENABLE_OPERAND 0x08 > > > > > +#define MACHXO2_ISC_ERASE_OPERAND 0x04 > > > > > > > > You need to deliver the meaning of each operand, rather than just point > > > > out this is for machxo2, that is for esp5. I assume the sysCONFIG will > > > > not deliberately design different commands with the exact same > > > > functionality for different boards. > > > > > > > > We should have a set of common configurations with finer granularity that > > > > board specific fpga manager device could select from, rather than create > > > > more and more similar macros for each new board. > > > > > > > > Back to the 2 operands, what's the meaning of 0x1 & 0x4 for erase, > > > > > > 0x1 - erase SRAM, 0x4 - erase FLASH. I'll redefine them properly in v9 > > > > > > > also 0x0 & 0x8 for enable? > > > > > > > > > > Their meaning is not documented. It's just 0x08 for MachXO2 and 0x00 for > > > ECP5. > > > > > > > > + > > > > > +struct sysconfig_priv { > > > > > + struct gpio_desc *program; > > > > > + struct gpio_desc *init; > > > > > + struct gpio_desc *done; > > > > > + struct spi_device *spi; > > > > > + u8 isc_enable_operand; > > > > > + u8 isc_erase_operand; > > > > > +}; > > > > > + > > > > > +static int sysconfig_poll_busy(struct sysconfig_priv *data) > > > > > +{ > > > > > + const u8 lsc_check_busy[] = SYSCONFIG_LSC_CHECK_BUSY; > > > > > + int ret, retries = SYSCONFIG_POLL_RETRIES; > > > > > + u8 busy; > > > > > + > > > > > + while (retries--) { > > > > > + ret = spi_write_then_read(data->spi, > > > > > + lsc_check_busy, sizeof(lsc_check_busy), > > > > > + &busy, sizeof(busy)); > > > > > + if (ret) > > > > > + return ret; > > > > > + > > > > > + if (!busy) > > > > > + return 0; > > > > > + > > > > > + usleep_range(50, 100); > > > > > + } > > > > > + > > > > > + return -EBUSY; > > > > > +} > > > > > + > > > > > +static int sysconfig_read_status(struct sysconfig_priv *data, u32 *status) > > > > > +{ > > > > > + const u8 lsc_read_status[] = SYSCONFIG_LSC_READ_STATUS; > > > > > + __be32 device_status; > > > > > + int ret; > > > > > + > > > > > + ret = spi_write_then_read(data->spi, > > > > > + 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 *data, u32 *status) > > > > > +{ > > > > > + int ret; > > > > > + > > > > > + ret = sysconfig_poll_busy(data); > > > > > + if (ret) > > > > > + return ret; > > > > > + > > > > > + return sysconfig_read_status(data, status); > > > > > +} > > > > > + > > > > > +static int sysconfig_poll_gpio(struct gpio_desc *gpio, bool is_active) > > > > > +{ > > > > > + int value, retries = SYSCONFIG_POLL_RETRIES; > > > > > + > > > > > + while (retries--) { > > > > > + value = gpiod_get_value(gpio); > > > > > + if (value < 0) > > > > > + return value; > > > > > + > > > > > + if ((!is_active && !value) || (is_active && value)) > > > > > + return 0; > > > > > + > > > > > + ndelay(10); > > > > > + } > > > > > + > > > > > + return -ETIMEDOUT; > > > > > +} > > > > > + > > > > > +static int sysconfig_refresh(struct sysconfig_priv *data) > > > > > +{ > > > > > + static const u8 lsc_refresh[] = SYSCONFIG_LSC_REFRESH; > > > > > + int ret; > > > > > + > > > > > + ret = spi_write(data->spi, lsc_refresh, sizeof(lsc_refresh)); > > > > > + if (ret) > > > > > + return ret; > > > > > + > > > > > + usleep_range(4000, 8000); > > > > > + > > > > > + return 0; > > > > > +} > > > > > + > > > > > +static int sysconfig_isc_enable(struct sysconfig_priv *data) > > > > > +{ > > > > > + u8 isc_enable[] = SYSCONFIG_ISC_ENABLE; > > > > > + u32 status; > > > > > + int ret; > > > > > + > > > > > + isc_enable[1] = data->isc_enable_operand; > > > > > + > > > > > + ret = spi_write(data->spi, isc_enable, sizeof(isc_enable)); > > > > > + if (ret) > > > > > + return ret; > > > > > + > > > > > + ret = sysconfig_poll_status(data, &status); > > > > > + if (ret || (status & SYSCONFIG_STATUS_FAIL)) > > > > > + return ret ? : -EFAULT; > > > > > + > > > > > + return 0; > > > > > +} > > > > > + > > > > > +static int sysconfig_isc_erase(struct sysconfig_priv *data) > > > > > +{ > > > > > + u8 isc_erase[] = SYSCONFIG_ISC_ERASE; > > > > > + u32 status; > > > > > + int ret; > > > > > + > > > > > + isc_erase[1] = data->isc_erase_operand; > > > > > + > > > > > + ret = spi_write(data->spi, isc_erase, sizeof(isc_erase)); > > > > > + if (ret) > > > > > + return ret; > > > > > + > > > > > + ret = sysconfig_poll_status(data, &status); > > > > > + if (ret || (status & SYSCONFIG_STATUS_FAIL)) > > > > > + return ret ? : -EFAULT; > > > > > + > > > > > + return 0; > > > > > +} > > > > > + > > > > > +static int sysconfig_isc_init(struct sysconfig_priv *data) > > > > > +{ > > > > > + int ret; > > > > > + > > > > > + ret = sysconfig_isc_enable(data); > > > > > + if (ret) > > > > > + return ret; > > > > > + > > > > > + return sysconfig_isc_erase(data); > > > > > +} > > > > > + > > > > > +static int sysconfig_lsc_init_addr(struct sysconfig_priv *data) > > > > > +{ > > > > > + const u8 lsc_init_addr[] = SYSCONFIG_LSC_INIT_ADDR; > > > > > + > > > > > + return spi_write(data->spi, lsc_init_addr, sizeof(lsc_init_addr)); > > > > > +} > > > > > + > > > > > +static int sysconfig_lsc_bitstream_burst(struct sysconfig_priv *data) > > > > > +{ > > > > > + const u8 lsc_bitstream_burst[] = SYSCONFIG_LSC_BITSTREAM_BURST; > > > > > + struct spi_transfer xfer = { > > > > > + .tx_buf = lsc_bitstream_burst, > > > > > + .len = sizeof(lsc_bitstream_burst), > > > > > + .cs_change = 1, > > > > > + }; > > > > > + struct spi_message msg; > > > > > + > > > > > + spi_message_init_with_transfers(&msg, &xfer, 1); > > > > > + > > > > > + return spi_sync_locked(data->spi, &msg); > > > > > +} > > > > > + > > > > > +static int sysconfig_isc_prog_done(struct sysconfig_priv *data) > > > > > +{ > > > > > + const u8 isc_prog_done[] = SYSCONFIG_ISC_PROGRAM_DONE; > > > > > + u32 status; > > > > > + int ret; > > > > > + > > > > > + ret = spi_write(data->spi, isc_prog_done, sizeof(isc_prog_done)); > > > > > + if (ret) > > > > > + return ret; > > > > > + > > > > > + ret = sysconfig_poll_status(data, &status); > > > > > + if (ret) > > > > > + return ret; > > > > > + > > > > > + if (status & SYSCONFIG_STATUS_DONE) > > > > > + return 0; > > > > > + > > > > > + return -EFAULT; > > > > > +} > > > > > + > > > > > +static int sysconfig_isc_disable(struct sysconfig_priv *data) > > > > > +{ > > > > > + const u8 isc_disable[] = SYSCONFIG_ISC_DISABLE; > > > > > + > > > > > + return spi_write(data->spi, isc_disable, sizeof(isc_disable)); > > > > > +} > > > > > + > > > > > +static enum fpga_mgr_states ecp5_ops_state(struct fpga_manager *mgr) > > > > > +{ > > > > > + struct sysconfig_priv *priv = mgr->priv; > > > > > + > > > > > + return (gpiod_get_value(priv->done) > 0) ? FPGA_MGR_STATE_OPERATING : > > > > > + FPGA_MGR_STATE_UNKNOWN; > > > > > +} > > > > > + > > > > > +static int ecp5_ops_write_init(struct fpga_manager *mgr, > > > > > + struct fpga_image_info *info, > > > > > + const char *buf, size_t count) > > > > > +{ > > > > > + struct sysconfig_priv *priv = mgr->priv; > > > > > + struct spi_device *spi = priv->spi; > > > > > + struct device *dev = &mgr->dev; > > > > > + struct gpio_desc *program; > > > > > + struct gpio_desc *init; > > > > > + struct gpio_desc *done; > > > > > + int ret; > > > > > + > > > > > + if (info->flags & FPGA_MGR_PARTIAL_RECONFIG) { > > > > > + dev_err(dev, "Partial reconfiguration is not supported\n"); > > > > > + return -EOPNOTSUPP; > > > > > + } > > > > > + > > > > > + program = priv->program; > > > > > + init = priv->init; > > > > > + done = priv->done; > > > > > + > > > > > + /* Enter init mode */ > > > > > + gpiod_set_value(program, 1); > > > > > > > > Same concern, provide gpio or command options for all board specific > > > > fpga manager to select. > > > > > > > > I'll not list each features one by one below. > > > > > > > > some more comments below. > > > > > > > > > + > > > > > + ret = sysconfig_poll_gpio(init, true); > > > > > + if (!ret) > > > > > + ret = sysconfig_poll_gpio(done, false); > > > > > + > > > > > + if (ret) { > > > > > + dev_err(dev, "Failed to go to init mode\n"); > > > > > + return ret; > > > > > + } > > > > > + > > > > > + /* Enter program mode */ > > > > > + gpiod_set_value(program, 0); > > > > > + > > > > > + ret = sysconfig_poll_gpio(init, false); > > > > > + 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; > > > > > + } > > > > > + > > > > > + /* > > > > > + * Lock SPI bus for exclusive usage until FPGA programming is done. > > > > > + * SPI bus will be released in ecp5_ops_write_complete() or on error. > > > > > + */ > > > > > + spi_bus_lock(spi->controller); > > > > > + > > > > > + /* Prepare for bitstream burst write */ > > > > > + ret = sysconfig_lsc_bitstream_burst(priv); > > > > > + if (ret) { > > > > > + dev_err(dev, "Failed to prepare for bitstream burst write\n"); > > > > > + spi_bus_unlock(spi->controller); > > > > > + } > > > > > + > > > > > + return ret; > > > > > +} > > > > > + > > > > > +static int ecp5_ops_write(struct fpga_manager *mgr, const char *buf, size_t count) > > > > > +{ > > > > > + struct sysconfig_priv *priv = mgr->priv; > > > > > + struct spi_device *spi = priv->spi; > > > > > + struct spi_transfer xfer = { > > > > > + .tx_buf = buf, > > > > > + .len = count, > > > > > + .cs_change = 1, > > > > > + }; > > > > > + struct spi_message msg; > > > > > + int ret; > > > > > + > > > > > + spi_message_init_with_transfers(&msg, &xfer, 1); > > > > > + ret = spi_sync_locked(spi, &msg); > > > > > + if (ret) > > > > > + spi_bus_unlock(spi->controller); > > > > > + > > > > > + return ret; > > > > > +} > > > > > + > > > > > +static int ecp5_ops_write_complete(struct fpga_manager *mgr, > > > > > + struct fpga_image_info *info) > > > > > +{ > > > > > + struct sysconfig_priv *priv = mgr->priv; > > > > > + struct spi_device *spi = priv->spi; > > > > > + struct device *dev = &mgr->dev; > > > > > + int ret; > > > > > + > > > > > + /* Bitstream burst write is done, release SPI bus */ > > > > > + spi_bus_unlock(spi->controller); > > > > > + > > > > > + /* Toggle CS and wait for bitstream write to finish */ > > > > > + ret = spi_write(spi, NULL, 0); > > > > > + if (!ret) > > > > > + ret = sysconfig_poll_busy(priv); > > > > > + > > > > > + if (ret) { > > > > > + dev_err(dev, "Error while waiting bitstream write to finish\n"); > > > > > + return ret; > > > > > + } > > > > > + > > > > > + /* Exit ISC mode */ > > > > > + ret = sysconfig_isc_disable(priv); > > > > > + if (!ret) > > > > > + ret = sysconfig_poll_gpio(priv->done, true); > > > > > + > > > > > + if (ret) > > > > > + dev_err(dev, "Failed to finish ISC\n"); > > > > > + > > > > > + return ret; > > > > > +} > > > > > + > > > > > +static const struct fpga_manager_ops ecp5_fpga_ops = { > > > > > + .state = ecp5_ops_state, > > > > > + .write_init = ecp5_ops_write_init, > > > > > + .write = ecp5_ops_write, > > > > > + .write_complete = ecp5_ops_write_complete, > > > > > +}; > > > > > + > > > > > +static int ecp5_probe(struct sysconfig_priv *priv) > > > > > +{ > > > > > + struct spi_device *spi = priv->spi; > > > > > + struct device *dev = &spi->dev; > > > > > + struct fpga_manager *mgr; > > > > > + int ret; > > > > > + > > > > > + if (spi->max_speed_hz > ECP5_SPI_MAX_SPEED_HZ) { > > > > > + dev_err(dev, "SPI speed %u is too high, maximum speed is %u\n", > > > > > + spi->max_speed_hz, ECP5_SPI_MAX_SPEED_HZ); > > > > > + return -EINVAL; > > > > > + } > > > > > + > > > > > + priv->isc_erase_operand = ECP5_ISC_ERASE_OPERAND; > > > > > + > > > > > + priv->done = devm_gpiod_get(dev, "done", GPIOD_IN); > > > > > + if (IS_ERR(priv->done)) { > > > > > + ret = PTR_ERR(priv->done); > > > > > + dev_err(dev, "Failed to get DONE GPIO: %d\n", ret); > > > > > + return ret; > > > > > + } > > > > > + > > > > > + priv->init = devm_gpiod_get(dev, "init", GPIOD_IN); > > > > > + if (IS_ERR(priv->init)) { > > > > > + ret = PTR_ERR(priv->init); > > > > > + dev_err(dev, "Failed to get INIT GPIO: %d\n", ret); > > > > > + return ret; > > > > > + } > > > > > + > > > > > + priv->program = devm_gpiod_get(dev, "program", GPIOD_OUT_LOW); > > > > > + if (IS_ERR(priv->program)) { > > > > > + ret = PTR_ERR(priv->program); > > > > > + dev_err(dev, "Failed to get PROGRAM GPIO: %d\n", ret); > > > > > + return ret; > > > > > + } > > > > > + > > > > > + mgr = devm_fpga_mgr_register(dev, "Lattice ECP5 SPI FPGA Manager", > > > > > + &ecp5_fpga_ops, priv); > > > > > + > > > > > + return PTR_ERR_OR_ZERO(mgr); > > > > > +} > > > > > + > > > > > +static enum fpga_mgr_states machxo2_ops_state(struct fpga_manager *mgr) > > > > > +{ > > > > > + struct sysconfig_priv *priv = mgr->priv; > > > > > + u32 status; > > > > > + int ret; > > > > > + > > > > > + ret = sysconfig_read_status(priv, &status); > > > > > + if (ret || !(status & SYSCONFIG_STATUS_DONE)) > > > > > + return FPGA_MGR_STATE_UNKNOWN; > > > > > + > > > > > + return FPGA_MGR_STATE_OPERATING; > > > > > +} > > > > > + > > > > > +static int machxo2_ops_write_init(struct fpga_manager *mgr, > > > > > + struct fpga_image_info *info, > > > > > + const char *buf, size_t count) > > > > > +{ > > > > > + struct sysconfig_priv *priv = mgr->priv; > > > > > + struct device *dev = &mgr->dev; > > > > > + int ret; > > > > > + > > > > > + if (info->flags & FPGA_MGR_PARTIAL_RECONFIG) { > > > > > + dev_err(dev, "Partial reconfiguration is not supported\n"); > > > > > + return -EOPNOTSUPP; > > > > > + } > > > > > + > > > > > + /* 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; > > > > > +} > > > > > + > > > > > +static int machxo2_ops_write(struct fpga_manager *mgr, const char *buf, size_t count) > > > > > +{ > > > > > + const u8 lsc_progincr[] = SYSCONFIG_LSC_PROG_INCR_NV; > > > > > + struct sysconfig_priv *priv = mgr->priv; > > > > > + struct device *dev = &mgr->dev; > > > > > + struct spi_transfer xfers[2] = { > > > > > + { > > > > > + .tx_buf = lsc_progincr, > > > > > + .len = sizeof(lsc_progincr), > > > > > + }, { > > > > > + .len = MACHXO2_PAGE_SIZE, > > > > > + }, > > > > > + }; > > > > > + size_t i; > > > > > + int ret; > > > > > + > > > > > + if (count % MACHXO2_PAGE_SIZE) { > > > > > + dev_err(dev, "Malformed payload.\n"); > > > > > + return -EINVAL; > > > > > + } > > > > > + > > > > > + for (i = 0; i < count; i += MACHXO2_PAGE_SIZE) { > > > > > + xfers[1].tx_buf = buf + i; > > > > > + > > > > > + ret = spi_sync_transfer(priv->spi, xfers, 2); > > > > > + if (!ret) > > > > > + ret = sysconfig_poll_busy(priv); > > > > > + > > > > > + if (ret) { > > > > > + dev_err(dev, "Failed to write frame %zu of %zu\n", > > > > > + i / MACHXO2_PAGE_SIZE, count / MACHXO2_PAGE_SIZE); > > > > > + return ret; > > > > > + } > > > > > + } > > > > > + > > > > > + return 0; > > > > > +} > > > > > + > > > > > +static void machxo2_cleanup(struct sysconfig_priv *data) > > > > > +{ > > > > > + sysconfig_isc_erase(data); > > > > > + sysconfig_refresh(data); > > > > > +} > > > > > + > > > > > +static int machxo2_ops_write_complete(struct fpga_manager *mgr, > > > > > + struct fpga_image_info *info) > > > > > +{ > > > > > + int ret, retries = SYSCONFIG_POLL_RETRIES; > > > > > + struct sysconfig_priv *priv = mgr->priv; > > > > > + struct device *dev = &mgr->dev; > > > > > + u32 status; > > > > > + > > > > > + ret = sysconfig_isc_prog_done(priv); > > > > > + if (ret) { > > > > > + dev_err(dev, "Failed to enable Self-Download Mode\n"); > > > > > + goto fail; > > > > > + } > > > > > + > > > > > + ret = sysconfig_isc_disable(priv); > > > > > + if (ret) { > > > > > + dev_err(dev, "Failed to disable Configuration Interface\n"); > > > > > + goto fail; > > > > > + } > > > > > + > > > > > + while (retries--) { > > > > > + ret = sysconfig_refresh(priv); > > > > > + if (!ret) > > > > > + ret = sysconfig_read_status(priv, &status); > > > > > + > > > > > + if (ret) { > > > > > + dev_err(dev, "Failed to refresh\n"); > > > > > + break; > > > > > + } > > > > > + > > > > > + if (status & SYSCONFIG_STATUS_DONE && > > > > > + !(status & SYSCONFIG_STATUS_BUSY) && > > > > > + !(status & SYSCONFIG_STATUS_ERR)) > > > > > + return 0; > > > > > + } > > > > > + > > > > > +fail: > > > > > + machxo2_cleanup(priv); > > > > > + > > > > > + return -EFAULT; > > > > > +} > > > > > + > > > > > +static const struct fpga_manager_ops machxo2_fpga_ops = { > > > > > + .state = machxo2_ops_state, > > > > > + .write_init = machxo2_ops_write_init, > > > > > + .write = machxo2_ops_write, > > > > > + .write_complete = machxo2_ops_write_complete, > > > > > +}; > > > > > + > > > > > +static int machxo2_probe(struct sysconfig_priv *priv) > > > > > +{ > > > > > + struct spi_device *spi = priv->spi; > > > > > + struct device *dev = &spi->dev; > > > > > + struct fpga_manager *mgr; > > > > > + > > > > > + if (spi->max_speed_hz > MACHXO2_SPI_MAX_SPEED_HZ) { > > > > > + dev_err(dev, "SPI speed %u is too high, maximum speed is %u\n", > > > > > + spi->max_speed_hz, MACHXO2_SPI_MAX_SPEED_HZ); > > > > > + return -EINVAL; > > > > > + } > > > > > + > > > > > + priv->isc_enable_operand = MACHXO2_ISC_ENABLE_OPERAND; > > > > > + priv->isc_erase_operand = MACHXO2_ISC_ERASE_OPERAND; > > > > > + > > > > > + mgr = devm_fpga_mgr_register(dev, "Lattice MachXO2 SPI FPGA Manager", > > > > > + &machxo2_fpga_ops, priv); > > > > > + > > > > > + return PTR_ERR_OR_ZERO(mgr); > > > > > +} > > > > > + > > > > > +typedef int (*lattice_fpga_probe_func)(struct sysconfig_priv *); > > > > > + > > > > > +static int sysconfig_probe(struct spi_device *spi) > > > > > +{ > > > > > + const struct spi_device_id *dev_id; > > > > > + lattice_fpga_probe_func probe_func; > > > > > + struct device *dev = &spi->dev; > > > > > + struct sysconfig_priv *priv; > > > > > + > > > > > + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); > > > > > + if (!priv) > > > > > + return -ENOMEM; > > > > > + > > > > > + priv->spi = spi; > > > > > + > > > > > + probe_func = of_device_get_match_data(&spi->dev); > > > > > + if (!probe_func) { > > > > > + dev_id = spi_get_device_id(spi); > > > > > + if (!dev_id) > > > > > + return -ENODEV; > > > > > + > > > > > + probe_func = (lattice_fpga_probe_func)dev_id->driver_data; > > > > > + } > > > > > + > > > > > + if (!probe_func) > > > > > + return -EINVAL; > > > > > + > > > > > + return probe_func(priv); > > > > > +} > > > > > + > > > > > +static const struct spi_device_id sysconfig_spi_ids[] = { > > > > > + { > > > > > + .name = "ecp5-fpga-mgr", > > > > > + .driver_data = (kernel_ulong_t)ecp5_probe, > > > > > + }, { > > > > > + .name = "machxo2-fpga-mgr", > > > > > + .driver_data = (kernel_ulong_t)machxo2_probe, > > > > > > > > Putting the whole probe flow in driver_data is the same as providing 2 > > > > drivers. The purpose is not to put all the code in one file. > > > > > > > > > > Sorry, I don't understand what you suggest. Separate file for each > > > specific FPGA? > > > > Sorry, didn't make it clear. I feel like there are still 2 board > > specific drivers although they are now in one file, they have > > separate probes, fpga manager ops, different spi APIs ... > > > > What I expect is, the driver operates the HW according to the configured > > properties specified in sysCONFIG spec, such as having PROGRAMN gpio pin? > > burst? having backup flash? ... > > Ok, got it. But since I have only ECP5 this will be extremely error > prone for other FPGAs. > Also there is no single sysCONFIG spec, but each specific FPGA have its sysCONFIG description in its datasheet. Thus this path might be a slippery slope. > > > > Thanks, > > Yilun > > > > > > > > > Thanks, > > > > Yilun > > > > > > > > > + }, {}, > > > > > +}; > > > > > +MODULE_DEVICE_TABLE(spi, sysconfig_spi_ids); > > > > > + > > > > > +#if IS_ENABLED(CONFIG_OF) > > > > > +static const struct of_device_id sysconfig_of_ids[] = { > > > > > + { > > > > > + .compatible = "lattice,ecp5-fpga-mgr", > > > > > + .data = ecp5_probe, > > > > > + }, { > > > > > + .compatible = "lattice,machxo2-fpga-mgr", > > > > > + .data = machxo2_probe > > > > > + }, {}, > > > > > +}; > > > > > +MODULE_DEVICE_TABLE(of, sysconfig_of_ids); > > > > > +#endif /* IS_ENABLED(CONFIG_OF) */ > > > > > + > > > > > +static struct spi_driver lattice_sysconfig_driver = { > > > > > + .probe = sysconfig_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"); > > > > > -- > > > > > 2.37.2 > > > > > > > > > > > > >