From patchwork Wed Oct 30 08:44:46 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?Q3PDs2vDoXMgQmVuY2U=?= X-Patchwork-Id: 13856129 Received: from fw2.prolan.hu (fw2.prolan.hu [193.68.50.107]) (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 58BBE149C64; Wed, 30 Oct 2024 08:45:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.68.50.107 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730277926; cv=none; b=br+0jSo7NVkiuAtt5pkxP5FtbBKqmNkTCXhHdoKGJzjROTn/DwJBZs/ODlN4UR2+rDUCZM0At3ajBqTX4mSoUEQH6iqTq05R1/8sOgd0I5DTcpxwOmVgSF0oO1XTP4w8omtMjY3OMhzvJ3zdbGpdqOFRfcPo1JSl7SpfE2QGy9w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730277926; c=relaxed/simple; bh=DjrKVkjupKb3hhQGkeCeNIG5gSTj6ohY3jj7zadFT4A=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=RBHBqFOH6+ARRVMaBFiX+CllYpJEjzrywZRiAxkL/uEhlN0D8CIaP8RQKCWceBMG2rOH9lxPFY66ElJR5dpSn5CZnlUnSWgMQS9z6l5himojhk573yMlLlp2fnXpAnD9N66k2q+gmpVtiIIj3g/N6o7a0O5F/RgFBZZ95lkc9mg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=prolan.hu; spf=pass smtp.mailfrom=prolan.hu; dkim=pass (4096-bit key) header.d=prolan.hu header.i=@prolan.hu header.b=hKbnog0k; arc=none smtp.client-ip=193.68.50.107 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=prolan.hu Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=prolan.hu Authentication-Results: smtp.subspace.kernel.org; dkim=pass (4096-bit key) header.d=prolan.hu header.i=@prolan.hu header.b="hKbnog0k" Received: from proxmox-mailgw.intranet.prolan.hu (localhost.localdomain [127.0.0.1]) by proxmox-mailgw.intranet.prolan.hu (Proxmox) with ESMTP id BD22FA11B6; Wed, 30 Oct 2024 09:45:18 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=prolan.hu; h=cc :cc:content-transfer-encoding:content-type:content-type:date :from:from:message-id:mime-version:reply-to:subject:subject:to :to; s=mail; bh=pCTs7xE1RNDjOAhXIwJf35Ye4AhjEVbQRROagoMzs9M=; b= hKbnog0k6h+HIXxGMurg+nml0X6WXIn5lG2XxzpBOxmO9phmczQsE0Ls7CoIkhCF h4tf10MLv1VQSp/STabqL6oOywt/sdbVRp3nu2cU6drXIq8rHBUlFz+QAUokHp9j vWLzsLP00CqjMFhCIv9DqQU6xapuFhYyfXCXOFbcTU5gFNAt5JpnPzkNsgpU9y3E yzzBR8TP2O2VjmErg4EMsx3n6AuLfIZfYbsNEVItEqXUdF5+yiHL1k3fhS8+n7Oq TQLZBb/xNULYZK8g3ohtmsv8aBjFZrPbrMfssnKUCk1733DDURhQzYlj284ulbbo RfVB5kxbkpQykVu5jsLPsW0k3iE0xWZ3EeSHjqaJkoALEugCRbszR+MANLCn8ejk ToFwZ5v03vbNPc8lOdxcGYjvIqUDUfjG/xDbAgH1HKpnEiwiO8amJBthOR9UuArg uC+4R2Ym9Y+anBkywKz1Jd/Y/pJJicL11y6i7c6Nsxt8DkV0MuE+9X4Ps0D4uSyu eE1CL3lH3DHcBetJO1c/IxFz0DcXaV7ApzvxjDpFW8J49uxQ0XF4hfggGGawtMgk OTYm51/Bqmo59x2NXBhoMyiuBkT5mB0xNftFUghNNHQaSxfwqm+6nUIpNRFFxMMv /JNmrSHtg5shKP7Kwp80DeD1F+BguUJGBV3sDksZLjo= From: =?utf-8?b?Q3PDs2vDoXMsIEJlbmNl?= To: , , CC: =?utf-8?b?Q3PDs2vDoXMsIEJlbmNl?= , "Tudor Ambarus" , Varshini Rajendran , Mark Brown , "Nicolas Ferre" , Alexandre Belloni , Claudiu Beznea Subject: [PATCH v2] spi: atmel-quadspi: Create `atmel_qspi_ops` to support newer SoC families Date: Wed, 30 Oct 2024 09:44:46 +0100 Message-ID: <20241030084445.2438750-1-csokas.bence@prolan.hu> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ESET-AS: R=OK;S=0;OP=CALC;TIME=1730277917;VERSION=7979;MC=2867805427;ID=197345;TRN=0;CRV=0;IPC=;SP=0;SIPS=0;PI=3;F=0 X-ESET-Antispam: OK X-EsetResult: clean, is OK X-EsetId: 37303A2980D94855667763 Refactor the code to introduce an ops struct, to prepare for merging support for later SoCs, such as SAMA7G5. This code was based on the vendor's kernel (linux4microchip). Cc'ing original contributors. Cc: Tudor Ambarus Cc: Varshini Rajendran Signed-off-by: Csókás, Bence --- Notes: Changes in v2: * Remove obsolete SPI naming drivers/spi/atmel-quadspi.c | 111 +++++++++++++++++++++++++----------- 1 file changed, 77 insertions(+), 34 deletions(-) diff --git a/drivers/spi/atmel-quadspi.c b/drivers/spi/atmel-quadspi.c index 95cdfc28361e..1d256ab3f7f2 100644 --- a/drivers/spi/atmel-quadspi.c +++ b/drivers/spi/atmel-quadspi.c @@ -138,11 +138,15 @@ #define QSPI_WPSR_WPVSRC_MASK GENMASK(15, 8) #define QSPI_WPSR_WPVSRC(src) (((src) << 8) & QSPI_WPSR_WPVSRC) +#define ATMEL_QSPI_TIMEOUT 1000 /* ms */ + struct atmel_qspi_caps { bool has_qspick; bool has_ricr; }; +struct atmel_qspi_ops; + struct atmel_qspi { void __iomem *regs; void __iomem *mem; @@ -150,13 +154,22 @@ struct atmel_qspi { struct clk *qspick; struct platform_device *pdev; const struct atmel_qspi_caps *caps; + const struct atmel_qspi_ops *ops; resource_size_t mmap_size; u32 pending; + u32 irq_mask; u32 mr; u32 scr; struct completion cmd_completion; }; +struct atmel_qspi_ops { + int (*set_cfg)(struct atmel_qspi *aq, const struct spi_mem_op *op, + u32 *offset); + int (*transfer)(struct spi_mem *mem, const struct spi_mem_op *op, + u32 offset); +}; + struct atmel_qspi_mode { u8 cmd_buswidth; u8 addr_buswidth; @@ -404,10 +417,60 @@ static int atmel_qspi_set_cfg(struct atmel_qspi *aq, return 0; } +static int atmel_qspi_wait_for_completion(struct atmel_qspi *aq, u32 irq_mask) +{ + int err = 0; + u32 sr; + + /* Poll INSTRuction End status */ + sr = atmel_qspi_read(aq, QSPI_SR); + if ((sr & irq_mask) == irq_mask) + return 0; + + /* Wait for INSTRuction End interrupt */ + reinit_completion(&aq->cmd_completion); + aq->pending = sr & irq_mask; + aq->irq_mask = irq_mask; + atmel_qspi_write(irq_mask, aq, QSPI_IER); + if (!wait_for_completion_timeout(&aq->cmd_completion, + msecs_to_jiffies(ATMEL_QSPI_TIMEOUT))) + err = -ETIMEDOUT; + atmel_qspi_write(irq_mask, aq, QSPI_IDR); + + return err; +} + +static int atmel_qspi_transfer(struct spi_mem *mem, + const struct spi_mem_op *op, u32 offset) +{ + struct atmel_qspi *aq = spi_controller_get_devdata(mem->spi->controller); + + /* Skip to the final steps if there is no data */ + if (!op->data.nbytes) + return atmel_qspi_wait_for_completion(aq, + QSPI_SR_CMD_COMPLETED); + + /* Dummy read of QSPI_IFR to synchronize APB and AHB accesses */ + (void)atmel_qspi_read(aq, QSPI_IFR); + + /* Send/Receive data */ + if (op->data.dir == SPI_MEM_DATA_IN) + memcpy_fromio(op->data.buf.in, aq->mem + offset, + op->data.nbytes); + else + memcpy_toio(aq->mem + offset, op->data.buf.out, + op->data.nbytes); + + /* Release the chip-select */ + atmel_qspi_write(QSPI_CR_LASTXFER, aq, QSPI_CR); + + return atmel_qspi_wait_for_completion(aq, QSPI_SR_CMD_COMPLETED); +} + static int atmel_qspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) { struct atmel_qspi *aq = spi_controller_get_devdata(mem->spi->controller); - u32 sr, offset; + u32 offset; int err; /* @@ -416,46 +479,20 @@ static int atmel_qspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) * when the flash memories overrun the controller's memory space. */ if (op->addr.val + op->data.nbytes > aq->mmap_size) - return -ENOTSUPP; + return -EOPNOTSUPP; + + if (op->addr.nbytes > 4) + return -EOPNOTSUPP; err = pm_runtime_resume_and_get(&aq->pdev->dev); if (err < 0) return err; - err = atmel_qspi_set_cfg(aq, op, &offset); + err = aq->ops->set_cfg(aq, op, &offset); if (err) goto pm_runtime_put; - /* Skip to the final steps if there is no data */ - if (op->data.nbytes) { - /* Dummy read of QSPI_IFR to synchronize APB and AHB accesses */ - (void)atmel_qspi_read(aq, QSPI_IFR); - - /* Send/Receive data */ - if (op->data.dir == SPI_MEM_DATA_IN) - memcpy_fromio(op->data.buf.in, aq->mem + offset, - op->data.nbytes); - else - memcpy_toio(aq->mem + offset, op->data.buf.out, - op->data.nbytes); - - /* Release the chip-select */ - atmel_qspi_write(QSPI_CR_LASTXFER, aq, QSPI_CR); - } - - /* Poll INSTRuction End status */ - sr = atmel_qspi_read(aq, QSPI_SR); - if ((sr & QSPI_SR_CMD_COMPLETED) == QSPI_SR_CMD_COMPLETED) - goto pm_runtime_put; - - /* Wait for INSTRuction End interrupt */ - reinit_completion(&aq->cmd_completion); - aq->pending = sr & QSPI_SR_CMD_COMPLETED; - atmel_qspi_write(QSPI_SR_CMD_COMPLETED, aq, QSPI_IER); - if (!wait_for_completion_timeout(&aq->cmd_completion, - msecs_to_jiffies(1000))) - err = -ETIMEDOUT; - atmel_qspi_write(QSPI_SR_CMD_COMPLETED, aq, QSPI_IDR); + err = aq->ops->transfer(mem, op, offset); pm_runtime_put: pm_runtime_mark_last_busy(&aq->pdev->dev); @@ -571,12 +608,17 @@ static irqreturn_t atmel_qspi_interrupt(int irq, void *dev_id) return IRQ_NONE; aq->pending |= pending; - if ((aq->pending & QSPI_SR_CMD_COMPLETED) == QSPI_SR_CMD_COMPLETED) + if ((aq->pending & aq->irq_mask) == aq->irq_mask) complete(&aq->cmd_completion); return IRQ_HANDLED; } +static const struct atmel_qspi_ops atmel_qspi_ops = { + .set_cfg = atmel_qspi_set_cfg, + .transfer = atmel_qspi_transfer, +}; + static int atmel_qspi_probe(struct platform_device *pdev) { struct spi_controller *ctrl; @@ -601,6 +643,7 @@ static int atmel_qspi_probe(struct platform_device *pdev) init_completion(&aq->cmd_completion); aq->pdev = pdev; + aq->ops = &atmel_qspi_ops; /* Map the registers */ aq->regs = devm_platform_ioremap_resource_byname(pdev, "qspi_base");