From patchwork Fri May 11 02:55:55 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Brown X-Patchwork-Id: 10392965 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 4E39360353 for ; Fri, 11 May 2018 02:56:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3813628C56 for ; Fri, 11 May 2018 02:56:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2C23D28CF8; Fri, 11 May 2018 02:56:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8238A28C56 for ; Fri, 11 May 2018 02:56:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752156AbeEKC4Z (ORCPT ); Thu, 10 May 2018 22:56:25 -0400 Received: from heliosphere.sirena.org.uk ([172.104.155.198]:34544 "EHLO heliosphere.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752028AbeEKC4W (ORCPT ); Thu, 10 May 2018 22:56:22 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sirena.org.uk; s=20170815-heliosphere; h=Date:Message-Id:In-Reply-To: Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:References: List-Id:List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner: List-Archive; bh=i3wx1zjdo8YlLY1lYLEbPV04XBR3Wig1QbPZGbTCKoc=; b=GbEej1ccAJnb BKgUPYMHaaZd509uy+s+e+JkBuFOlkUOXGcRx/7Q5Jou96XTssjZrBsVxkU4PmPjwAsUzoXFvV/v5 uz6jOGb4wxgenPS4aHQs5cEXhJKNdzrE/oqM+nxoqf5s0K+FK0YNM81kuBx4k0BnqHlGGqA5fo73/ SkPxY=; Received: from [2001:268:c0cd:b8ca:2aa0:ebb3:99a:5339] (helo=finisterre.ee.mobilebroadband) by heliosphere.sirena.org.uk with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1fGyDu-0002Xb-Us; Fri, 11 May 2018 02:56:00 +0000 Received: by finisterre.ee.mobilebroadband (Postfix, from userid 1000) id 1FAA0440084; Fri, 11 May 2018 03:55:55 +0100 (BST) From: Mark Brown To: Boris Brezillon Cc: Vignesh R , Mark Brown , David Woodhouse , Brian Norris , Marek Vasut , Richard Weinberger , Cyrille Pitchen , linux-mtd@lists.infradead.org, Miquel Raynal , Mark Brown , linux-spi@vger.kernel.org, Peter Pan , Frieder Schrempf , Vignesh R , Yogesh Gaur , =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= , Kamal Dasu , Maxime Chevallier , linux-spi@vger.kernel.org Subject: Applied "spi: ti-qspi: Implement the spi_mem interface" to the spi tree In-Reply-To: <20180426161820.2852-6-boris.brezillon@bootlin.com> Message-Id: <20180511025555.1FAA0440084@finisterre.ee.mobilebroadband> Date: Fri, 11 May 2018 03:55:55 +0100 (BST) Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The patch spi: ti-qspi: Implement the spi_mem interface has been applied to the spi tree at https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark From b95cb394ab591d1d6dcc7281b415fde0a3de2ae1 Mon Sep 17 00:00:00 2001 From: Boris Brezillon Date: Thu, 26 Apr 2018 18:18:18 +0200 Subject: [PATCH] spi: ti-qspi: Implement the spi_mem interface The spi_mem interface is meant to replace the spi_flash_read() one. Implement the ->exec_op() method so that we can smoothly get rid of the old interface. Signed-off-by: Boris Brezillon Reviewed-by: Vignesh R Tested-by: Vignesh R Signed-off-by: Mark Brown --- drivers/spi/spi-ti-qspi.c | 84 +++++++++++++++++++++++++++++++++------ 1 file changed, 71 insertions(+), 13 deletions(-) diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c index c24d9b45a27c..1b12c2ff8be3 100644 --- a/drivers/spi/spi-ti-qspi.c +++ b/drivers/spi/spi-ti-qspi.c @@ -36,6 +36,7 @@ #include #include +#include struct ti_qspi_regs { u32 clkctrl; @@ -50,6 +51,7 @@ struct ti_qspi { struct spi_master *master; void __iomem *base; void __iomem *mmap_base; + size_t mmap_size; struct regmap *ctrl_base; unsigned int ctrl_reg; struct clk *fclk; @@ -434,12 +436,10 @@ static int ti_qspi_dma_xfer(struct ti_qspi *qspi, dma_addr_t dma_dst, return 0; } -static int ti_qspi_dma_bounce_buffer(struct ti_qspi *qspi, - struct spi_flash_read_message *msg) +static int ti_qspi_dma_bounce_buffer(struct ti_qspi *qspi, loff_t offs, + void *to, size_t readsize) { - size_t readsize = msg->len; - void *to = msg->buf; - dma_addr_t dma_src = qspi->mmap_phys_base + msg->from; + dma_addr_t dma_src = qspi->mmap_phys_base + offs; int ret = 0; /* @@ -507,13 +507,14 @@ static void ti_qspi_disable_memory_map(struct spi_device *spi) qspi->mmap_enabled = false; } -static void ti_qspi_setup_mmap_read(struct spi_device *spi, - struct spi_flash_read_message *msg) +static void ti_qspi_setup_mmap_read(struct spi_device *spi, u8 opcode, + u8 data_nbits, u8 addr_width, + u8 dummy_bytes) { struct ti_qspi *qspi = spi_master_get_devdata(spi->master); - u32 memval = msg->read_opcode; + u32 memval = opcode; - switch (msg->data_nbits) { + switch (data_nbits) { case SPI_NBITS_QUAD: memval |= QSPI_SETUP_RD_QUAD; break; @@ -524,8 +525,8 @@ static void ti_qspi_setup_mmap_read(struct spi_device *spi, memval |= QSPI_SETUP_RD_NORMAL; break; } - memval |= ((msg->addr_width - 1) << QSPI_SETUP_ADDR_SHIFT | - msg->dummy_bytes << QSPI_SETUP_DUMMY_SHIFT); + memval |= ((addr_width - 1) << QSPI_SETUP_ADDR_SHIFT | + dummy_bytes << QSPI_SETUP_DUMMY_SHIFT); ti_qspi_write(qspi, memval, QSPI_SPI_SETUP_REG(spi->chip_select)); } @@ -546,13 +547,15 @@ static int ti_qspi_spi_flash_read(struct spi_device *spi, if (!qspi->mmap_enabled) ti_qspi_enable_memory_map(spi); - ti_qspi_setup_mmap_read(spi, msg); + ti_qspi_setup_mmap_read(spi, msg->read_opcode, msg->data_nbits, + msg->addr_width, msg->dummy_bytes); if (qspi->rx_chan) { if (msg->cur_msg_mapped) ret = ti_qspi_dma_xfer_sg(qspi, msg->rx_sg, msg->from); else - ret = ti_qspi_dma_bounce_buffer(qspi, msg); + ret = ti_qspi_dma_bounce_buffer(qspi, msg->from, + msg->buf, msg->len); if (ret) goto err_unlock; } else { @@ -566,6 +569,58 @@ static int ti_qspi_spi_flash_read(struct spi_device *spi, return ret; } +static int ti_qspi_exec_mem_op(struct spi_mem *mem, + const struct spi_mem_op *op) +{ + struct ti_qspi *qspi = spi_master_get_devdata(mem->spi->master); + u32 from = 0; + int ret = 0; + + /* Only optimize read path. */ + if (!op->data.nbytes || op->data.dir != SPI_MEM_DATA_IN || + !op->addr.nbytes || op->addr.nbytes > 4) + return -ENOTSUPP; + + /* Address exceeds MMIO window size, fall back to regular mode. */ + from = op->addr.val; + if (from + op->data.nbytes > qspi->mmap_size) + return -ENOTSUPP; + + mutex_lock(&qspi->list_lock); + + if (!qspi->mmap_enabled) + ti_qspi_enable_memory_map(mem->spi); + ti_qspi_setup_mmap_read(mem->spi, op->cmd.opcode, op->data.buswidth, + op->addr.nbytes, op->dummy.nbytes); + + if (qspi->rx_chan) { + struct sg_table sgt; + + if (virt_addr_valid(op->data.buf.in) && + !spi_controller_dma_map_mem_op_data(mem->spi->master, op, + &sgt)) { + ret = ti_qspi_dma_xfer_sg(qspi, sgt, from); + spi_controller_dma_unmap_mem_op_data(mem->spi->master, + op, &sgt); + } else { + ret = ti_qspi_dma_bounce_buffer(qspi, from, + op->data.buf.in, + op->data.nbytes); + } + } else { + memcpy_fromio(op->data.buf.in, qspi->mmap_base + from, + op->data.nbytes); + } + + mutex_unlock(&qspi->list_lock); + + return ret; +} + +static const struct spi_controller_mem_ops ti_qspi_mem_ops = { + .exec_op = ti_qspi_exec_mem_op, +}; + static int ti_qspi_start_transfer_one(struct spi_master *master, struct spi_message *m) { @@ -673,6 +728,7 @@ static int ti_qspi_probe(struct platform_device *pdev) master->bits_per_word_mask = SPI_BPW_MASK(32) | SPI_BPW_MASK(16) | SPI_BPW_MASK(8); master->spi_flash_read = ti_qspi_spi_flash_read; + master->mem_ops = &ti_qspi_mem_ops; if (!of_property_read_u32(np, "num-cs", &num_cs)) master->num_chipselect = num_cs; @@ -701,6 +757,7 @@ static int ti_qspi_probe(struct platform_device *pdev) "memory mapped resource not required\n"); } } + qspi->mmap_size = resource_size(res_mmap); irq = platform_get_irq(pdev, 0); if (irq < 0) { @@ -785,6 +842,7 @@ static int ti_qspi_probe(struct platform_device *pdev) PTR_ERR(qspi->mmap_base)); qspi->mmap_base = NULL; master->spi_flash_read = NULL; + master->mem_ops = NULL; } } qspi->mmap_enabled = false;