From patchwork Wed Feb 21 19:50:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Charles Perry X-Patchwork-Id: 13566256 Received: from mail.savoirfairelinux.com (mail.savoirfairelinux.com [208.88.110.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D292186130; Wed, 21 Feb 2024 19:52:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=208.88.110.44 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708545136; cv=none; b=kWmvzFgiGFH4Lh2st2NVBd59MtjC5o320/nhLzkWn2tldleLVXAfI6TrSJigRKzWLrEUWeLy2vqXDNKj1KqMcn8BONgk+gr6oWhiB1JF3kj7G0yw14ppRvu8Up3/QDP/cWXoy/bTA2B61/Ymoe5I4fvvx9QUsE5JXvKyKkGICiw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708545136; c=relaxed/simple; bh=NR5SjOtitKYacXAEEruvJ6JXFK2gpzJixBo6UISsrYc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tnlncYln82yXOTI0dMCjk5APDGjNWdglWeSYqCTuHY79RKRlKrtrbqflA43ncSZMVr+z5/g84qn/5blvX1Uw0wTI8R4ZryQvXxtiLK8Z7p69AxWqdRGGCoNf4UgiMcFr19Ed0rGB3KXb1BLGjHsjAJ4pM+8MLujz8JQF6P8bdgE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=savoirfairelinux.com; spf=pass smtp.mailfrom=savoirfairelinux.com; dkim=pass (2048-bit key) header.d=savoirfairelinux.com header.i=@savoirfairelinux.com header.b=cHFOniY0; arc=none smtp.client-ip=208.88.110.44 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=savoirfairelinux.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=savoirfairelinux.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=savoirfairelinux.com header.i=@savoirfairelinux.com header.b="cHFOniY0" Received: from localhost (localhost [127.0.0.1]) by mail.savoirfairelinux.com (Postfix) with ESMTP id AA2C09C4BD8; Wed, 21 Feb 2024 14:52:12 -0500 (EST) Received: from mail.savoirfairelinux.com ([127.0.0.1]) by localhost (mail.savoirfairelinux.com [127.0.0.1]) (amavis, port 10032) with ESMTP id cFCGRLPkRvWD; Wed, 21 Feb 2024 14:52:11 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mail.savoirfairelinux.com (Postfix) with ESMTP id 6CDC39C4BE8; Wed, 21 Feb 2024 14:52:11 -0500 (EST) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.savoirfairelinux.com 6CDC39C4BE8 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=savoirfairelinux.com; s=DFC430D2-D198-11EC-948E-34200CB392D2; t=1708545131; bh=ly1997o8a0kUOAeldUVP9gf71MeRB6+Tnu3YuBit5iE=; h=From:To:Date:Message-ID:MIME-Version; b=cHFOniY08786Xn1+A44yHKrzrwGhSu742BX1wi/PYKm6OEreBci/ayqmuoEkb5xN+ PQA3CwjhzM8DFnhInwD8l6LNHduMx07oyknCAUhaP2WMr3wqlkA43RYcYghlpQbQpQ U56ALZQTxF+RzuFldWlckDUQFwI1C8JFVk43j/EugPWBi2iYdsqhTwwP7VI45+LSBO +wTWxJtMl2jPR8N7ejT8d94K300O/5yeKrgf1Cr7f7SBFVlv9Ot+1UcFhngNr73B1D H3vfG8K1g8796kCsRH1RBDJ99ExfUu3tbwIPBLk0hMd9U996DlrsmIYyLZns7apoAj dg7alOL/1NB3Q== X-Virus-Scanned: amavis at mail.savoirfairelinux.com Received: from mail.savoirfairelinux.com ([127.0.0.1]) by localhost (mail.savoirfairelinux.com [127.0.0.1]) (amavis, port 10026) with ESMTP id cx5z08vs187s; Wed, 21 Feb 2024 14:52:11 -0500 (EST) Received: from pcperry.mtl.sfl (unknown [192.168.51.254]) by mail.savoirfairelinux.com (Postfix) with ESMTPSA id 489079C4BD8; Wed, 21 Feb 2024 14:52:11 -0500 (EST) From: Charles Perry To: mdf@kernel.org Cc: avandiver@markem-imaje.com, bcody@markem-imaje.com, Charles Perry , Wu Hao , Xu Yilun , Tom Rix , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Michal Simek , linux-fpga@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 3/3] fpga: xilinx-selectmap: add new driver Date: Wed, 21 Feb 2024 14:50:49 -0500 Message-ID: <20240221195058.1281973-4-charles.perry@savoirfairelinux.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240221195058.1281973-1-charles.perry@savoirfairelinux.com> References: <20240221195058.1281973-1-charles.perry@savoirfairelinux.com> Precedence: bulk X-Mailing-List: linux-fpga@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Xilinx 7 series FPGA can be programmed using a parallel port named the SelectMAP interface in the datasheet. This interface is compatible with the i.MX6 EIM bus controller but other types of external memory mapped parallel bus might work. xilinx-selectmap currently only supports the x8 mode where data is loaded at one byte per rising edge of the clock, with the MSb of each byte presented to the D0 pin. Signed-off-by: Charles Perry --- drivers/fpga/Kconfig | 8 +++ drivers/fpga/Makefile | 1 + drivers/fpga/xilinx-selectmap.c | 97 +++++++++++++++++++++++++++++++++ 3 files changed, 106 insertions(+) create mode 100644 drivers/fpga/xilinx-selectmap.c diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig index d27a1ebf40838..37b35f58f0dfb 100644 --- a/drivers/fpga/Kconfig +++ b/drivers/fpga/Kconfig @@ -67,6 +67,14 @@ config FPGA_MGR_STRATIX10_SOC config FPGA_MGR_XILINX_CORE tristate +config FPGA_MGR_XILINX_SELECTMAP + tristate "Xilinx Configuration over SelectMAP" + depends on HAS_IOMEM + select FPGA_MGR_XILINX_CORE + help + FPGA manager driver support for Xilinx FPGA configuration + over SelectMAP interface. + config FPGA_MGR_XILINX_SPI tristate "Xilinx Configuration over Slave Serial (SPI)" depends on SPI diff --git a/drivers/fpga/Makefile b/drivers/fpga/Makefile index 7ec795b6a5a70..aeb89bb13517e 100644 --- a/drivers/fpga/Makefile +++ b/drivers/fpga/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_FPGA_MGR_SOCFPGA_A10) += socfpga-a10.o obj-$(CONFIG_FPGA_MGR_STRATIX10_SOC) += stratix10-soc.o obj-$(CONFIG_FPGA_MGR_TS73XX) += ts73xx-fpga.o obj-$(CONFIG_FPGA_MGR_XILINX_CORE) += xilinx-core.o +obj-$(CONFIG_FPGA_MGR_XILINX_SELECTMAP) += xilinx-selectmap.o obj-$(CONFIG_FPGA_MGR_XILINX_SPI) += xilinx-spi.o obj-$(CONFIG_FPGA_MGR_ZYNQ_FPGA) += zynq-fpga.o obj-$(CONFIG_FPGA_MGR_ZYNQMP_FPGA) += zynqmp-fpga.o diff --git a/drivers/fpga/xilinx-selectmap.c b/drivers/fpga/xilinx-selectmap.c new file mode 100644 index 0000000000000..b63f4623f8b2c --- /dev/null +++ b/drivers/fpga/xilinx-selectmap.c @@ -0,0 +1,97 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Xilinx Spartan6 and 7 Series SelectMAP interface driver + * + * (C) 2024 Charles Perry + * + * Manage Xilinx FPGA firmware loaded over the SelectMAP configuration + * interface. + */ + +#include "xilinx-core.h" + +#include +#include +#include +#include +#include +#include + +struct xilinx_selectmap_conf { + struct xilinx_fpga_core core; + void __iomem *base; +}; + +#define to_xilinx_selectmap_conf(obj) \ + container_of(obj, struct xilinx_selectmap_conf, core) + +static int xilinx_selectmap_write(struct xilinx_fpga_core *core, + const char *buf, size_t count) +{ + struct xilinx_selectmap_conf *conf = to_xilinx_selectmap_conf(core); + u32 i; + + for (i = 0; i < count; ++i) + writeb(buf[i], conf->base); + + return 0; +} + +static int xilinx_selectmap_probe(struct platform_device *pdev) +{ + struct xilinx_selectmap_conf *conf; + struct resource *r; + void __iomem *base; + struct gpio_desc *csi_b; + struct gpio_desc *rdwr_b; + + conf = devm_kzalloc(&pdev->dev, sizeof(*conf), GFP_KERNEL); + if (!conf) + return -ENOMEM; + + conf->core.dev = &pdev->dev; + conf->core.write = xilinx_selectmap_write; + + base = devm_platform_get_and_ioremap_resource(pdev, 0, &r); + if (IS_ERR(base)) + return dev_err_probe(&pdev->dev, PTR_ERR(base), + "ioremap error\n"); + conf->base = base; + + /* CSI_B is active low */ + csi_b = devm_gpiod_get_optional(&pdev->dev, "csi", GPIOD_OUT_HIGH); + if (IS_ERR(csi_b)) + return dev_err_probe(&pdev->dev, PTR_ERR(csi_b), + "Failed to get CSI_B gpio\n"); + + /* RDWR_B is active low */ + rdwr_b = devm_gpiod_get_optional(&pdev->dev, "rdwr", GPIOD_OUT_HIGH); + if (IS_ERR(rdwr_b)) + return dev_err_probe(&pdev->dev, PTR_ERR(rdwr_b), + "Failed to get RDWR_B gpio\n"); + + return xilinx_core_probe(&conf->core); +} + +static const struct of_device_id xlnx_selectmap_of_match[] = { + { .compatible = "xlnx,fpga-xc7s-selectmap", }, // Spartan-7 + { .compatible = "xlnx,fpga-xc7a-selectmap", }, // Artix-7 + { .compatible = "xlnx,fpga-xc7k-selectmap", }, // Kintex-7 + { .compatible = "xlnx,fpga-xc7v-selectmap", }, // Virtex-7 + {}, +}; +MODULE_DEVICE_TABLE(of, xlnx_selectmap_of_match); + +static struct platform_driver xilinx_selectmap_driver = { + .driver = { + .name = "xilinx-selectmap", + .of_match_table = xlnx_selectmap_of_match, + }, + .probe = xilinx_selectmap_probe, +}; + +module_platform_driver(xilinx_selectmap_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Charles Perry "); +MODULE_DESCRIPTION("Load Xilinx FPGA firmware over SelectMap");