From patchwork Thu May 26 18:13:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ivan Bornyakov X-Patchwork-Id: 12862638 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 2E028C433F5 for ; Thu, 26 May 2022 18:38:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348048AbiEZSgx (ORCPT ); Thu, 26 May 2022 14:36:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52172 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344476AbiEZSgo (ORCPT ); Thu, 26 May 2022 14:36:44 -0400 Received: from mail.pr-group.ru (mail.pr-group.ru [178.18.215.3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2AE6A18E19; Thu, 26 May 2022 11:36:33 -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; bh=IkK3NzS1hE22RMP5L50ms4I3ob/gyfjbQFcGjzH7xkg=; b=P3dWYu1PYOhk9mk9iZ7ETuRujcfz48FkqWZl84k6Khs1PVEfOc+1Uz7Lh++ZcAr5/g7E/UwJofVVG Bwpg2lu4lJBYQT9zWBYc31q0Tsf02proVtbXgl08ud6iFaQvut36EPIgqgMdDD9Lnw3da8W0JyK1Ur o+3L4tE3XLxHUe8RoUYtfQKyOx1LmeAcFqIqKnKHYtaRSPR2gbitR9UhbqXpQmR0aQK4zaQQohDNmP 6XrtRrWlk8y5S7lMuvXABCoz7nDrGKLy0sD+ONvvLhQw1cMTK9lPChUYI5PjgHE4X+m3fd2mJY5SDE Rhfh4vC7xv68YFPqyRiEMfbhAPKvVVQ== X-Kerio-Anti-Spam: Build: [Engines: 2.16.3.1424, Stamp: 3], Multi: [Enabled, t: (0.000014,0.014531)], BW: [Enabled, t: (0.000014,0.000001)], RTDA: [Enabled, t: (0.188538), Hit: No, Details: v2.39.0; Id: 15.52ka9n.1g40qf6ik.1ho6f; mclb], total: 0(700) X-Footer: bWV0cm90ZWsucnU= Received: from localhost.localdomain ([178.70.36.174]) (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)); Thu, 26 May 2022 21:36:07 +0300 From: Ivan Bornyakov To: mdf@kernel.org, hao.wu@intel.com, yilun.xu@intel.com, trix@redhat.com, Conor.Dooley@microchip.com Cc: Ivan Bornyakov , 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: [PATCH v13 0/3] Microchip Polarfire FPGA manager Date: Thu, 26 May 2022 21:13:41 +0300 Message-Id: <20220526181344.2088-1-i.bornyakov@metrotek.ru> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fpga@vger.kernel.org Add support to the FPGA manager for programming Microchip Polarfire FPGAs over slave SPI interface with .dat formatted bitsream image. Changelog: v1 -> v2: fix printk formating v2 -> v3: * replace "microsemi" with "microchip" * replace prefix "microsemi_fpga_" with "mpf_" * more sensible .compatible and .name strings * remove unused defines STATUS_SPI_VIOLATION and STATUS_SPI_ERROR v3 -> v4: fix unused variable warning Put 'mpf_of_ids' definition under conditional compilation, so it would not hang unused if CONFIG_OF is not enabled. v4 -> v5: * prefix defines with MPF_ * mdelay() -> usleep_range() * formatting fixes * add DT bindings doc * rework fpga_manager_ops.write() to fpga_manager_ops.write_sg() We can't parse image header in write_init() because image header size is not known beforehand. Thus parsing need to be done in fpga_manager_ops.write() callback, but fpga_manager_ops.write() also need to be reenterable. On the other hand, fpga_manager_ops.write_sg() is called once. Thus, rework usage of write() callback to write_sg(). v5 -> v6: fix patch applying I forgot to clean up unrelated local changes which lead to error on patch 0001-fpga-microchip-spi-add-Microchip-MPF-FPGA-manager.patch applying on vanilla kernel. v6 -> v7: fix binding doc to pass dt_binding_check v7 -> v8: another fix for dt_binding_check warning v8 -> v9: * add another patch to support bitstream offset in FPGA image buffer * rework fpga_manager_ops.write_sg() back to fpga_manager_ops.write() * move image header parsing from write() to write_init() v9 -> v10: * add parse_header() callback to fpga_manager_ops * adjust fpga_mgr_write_init[_buf|_sg]() for parse_header() usage * implement parse_header() in microchip-spi driver v10 -> v11: include missing unaligned.h to microchip-spi fix error: implicit declaration of function 'get_unaligned_le[16|32]' v11 -> v12: * microchip-spi: double read hw status, ignore first read, because it can be unreliable. * microchip-spi: remove sleep between status readings in poll_status_not_busy() to save a few seconds. Status is polled on every 16 byte writes - that is quite often, therefore usleep_range() accumulate to a considerable number of seconds. v12 -> v13: * fpga-mgr: separate fpga_mgr_parse_header_buf() from fpga_mgr_write_init_buf() * fpga-mgr: introduce FPGA_MGR_STATE_PARSE_HEADER and FPGA_MGR_STATE_PARSE_HEADER_ERR fpga_mgr_states * fpga-mgr: rename fpga_mgr_write_init_sg() to fpga_mgr_prepare_sg() and rework with respect to a new fpga_mgr_parse_header_buf() * fpga-mgr: rework write accounting in fpga_mgr_buf_load_sg() for better clarity * microchip-spi: rename MPF_STATUS_POLL_TIMEOUT to MPF_STATUS_POLL_RETRIES * microchip-spi: add comment about status reading quirk to mpf_read_status() * microchip-spi: rename poll_status_not_busy() to mpf_poll_status() and add comment. * microchip-spi: make if statement in mpf_poll_status() easier to read. Ivan Bornyakov (3): fpga: fpga-mgr: support bitstream offset in image buffer fpga: microchip-spi: add Microchip MPF FPGA manager dt-bindings: fpga: add binding doc for microchip-spi fpga mgr .../fpga/microchip,mpf-spi-fpga-mgr.yaml | 44 ++ drivers/fpga/Kconfig | 9 + drivers/fpga/Makefile | 1 + drivers/fpga/fpga-mgr.c | 174 ++++++-- drivers/fpga/microchip-spi.c | 386 ++++++++++++++++++ include/linux/fpga/fpga-mgr.h | 17 +- 6 files changed, 599 insertions(+), 32 deletions(-) create mode 100644 Documentation/devicetree/bindings/fpga/microchip,mpf-spi-fpga-mgr.yaml create mode 100644 drivers/fpga/microchip-spi.c