From patchwork Fri May 22 00:07:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 11564219 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 941F713B4 for ; Fri, 22 May 2020 00:08:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 857EE20884 for ; Fri, 22 May 2020 00:08:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730466AbgEVAI3 (ORCPT ); Thu, 21 May 2020 20:08:29 -0400 Received: from mail.baikalelectronics.com ([87.245.175.226]:41188 "EHLO mail.baikalelectronics.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730127AbgEVAI0 (ORCPT ); Thu, 21 May 2020 20:08:26 -0400 Received: from localhost (unknown [127.0.0.1]) by mail.baikalelectronics.ru (Postfix) with ESMTP id 3CF698030791; Fri, 22 May 2020 00:08:24 +0000 (UTC) X-Virus-Scanned: amavisd-new at baikalelectronics.ru Received: from mail.baikalelectronics.ru ([127.0.0.1]) by localhost (mail.baikalelectronics.ru [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id J3Bik7PTjQr3; Fri, 22 May 2020 03:08:23 +0300 (MSK) From: Serge Semin To: Mark Brown CC: Serge Semin , Serge Semin , Georgy Vlasov , Ramil Zaripov , Alexey Malahov , Thomas Bogendoerfer , Paul Burton , Ralf Baechle , Arnd Bergmann , Andy Shevchenko , Rob Herring , , , Wan Ahmad Zainie , Jarkko Nikula , Thomas Gleixner , , Subject: [PATCH v4 02/16] spi: dw: Enable interrupts in accordance with DMA xfer mode Date: Fri, 22 May 2020 03:07:51 +0300 Message-ID: <20200522000806.7381-3-Sergey.Semin@baikalelectronics.ru> In-Reply-To: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> References: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org It's pointless to track the Tx overrun interrupts if Rx-only SPI transfer is issued. Similarly there is no need in handling the Rx overrun/underrun interrupts if Tx-only SPI transfer is executed. So lets unmask the interrupts only if corresponding SPI transactions are implied. Co-developed-by: Georgy Vlasov Signed-off-by: Georgy Vlasov Signed-off-by: Serge Semin Cc: Ramil Zaripov Cc: Alexey Malahov Cc: Thomas Bogendoerfer Cc: Paul Burton Cc: Ralf Baechle Cc: Arnd Bergmann Cc: Andy Shevchenko Cc: Rob Herring Cc: linux-mips@vger.kernel.org Cc: devicetree@vger.kernel.org --- drivers/spi/spi-dw-mid.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c index 2152c0cb3953..f24fcd925b48 100644 --- a/drivers/spi/spi-dw-mid.c +++ b/drivers/spi/spi-dw-mid.c @@ -297,19 +297,23 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_rx(struct dw_spi *dws, static int mid_spi_dma_setup(struct dw_spi *dws, struct spi_transfer *xfer) { - u16 dma_ctrl = 0; + u16 imr = 0, dma_ctrl = 0; dw_writel(dws, DW_SPI_DMARDLR, 0xf); dw_writel(dws, DW_SPI_DMATDLR, 0x10); - if (xfer->tx_buf) + if (xfer->tx_buf) { dma_ctrl |= SPI_DMA_TDMAE; - if (xfer->rx_buf) + imr |= SPI_INT_TXOI; + } + if (xfer->rx_buf) { dma_ctrl |= SPI_DMA_RDMAE; + imr |= SPI_INT_RXUI | SPI_INT_RXOI; + } dw_writel(dws, DW_SPI_DMACR, dma_ctrl); /* Set the interrupt mask */ - spi_umask_intr(dws, SPI_INT_TXOI | SPI_INT_RXUI | SPI_INT_RXOI); + spi_umask_intr(dws, imr); dws->transfer_handler = dma_transfer; From patchwork Fri May 22 00:07:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 11564223 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3313F60D for ; Fri, 22 May 2020 00:08:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 199A82078B for ; Fri, 22 May 2020 00:08:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729771AbgEVAIg (ORCPT ); Thu, 21 May 2020 20:08:36 -0400 Received: from mail.baikalelectronics.com ([87.245.175.226]:41256 "EHLO mail.baikalelectronics.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730127AbgEVAId (ORCPT ); Thu, 21 May 2020 20:08:33 -0400 Received: from localhost (unknown [127.0.0.1]) by mail.baikalelectronics.ru (Postfix) with ESMTP id 5481C8029EC9; Fri, 22 May 2020 00:08:30 +0000 (UTC) X-Virus-Scanned: amavisd-new at baikalelectronics.ru Received: from mail.baikalelectronics.ru ([127.0.0.1]) by localhost (mail.baikalelectronics.ru [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 1txSgPY95X9Q; Fri, 22 May 2020 03:08:29 +0300 (MSK) From: Serge Semin To: Mark Brown CC: Serge Semin , Serge Semin , Andy Shevchenko , Georgy Vlasov , Ramil Zaripov , Alexey Malahov , Thomas Bogendoerfer , Paul Burton , Ralf Baechle , Arnd Bergmann , Rob Herring , , , Wan Ahmad Zainie , Linus Walleij , Clement Leger , , Subject: [PATCH v4 04/16] spi: dw: Discard unused void priv pointer Date: Fri, 22 May 2020 03:07:53 +0300 Message-ID: <20200522000806.7381-5-Sergey.Semin@baikalelectronics.ru> In-Reply-To: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> References: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Seeing the "void *priv" member of the dw_spi data structure is unused let's remove it. The glue-layers can embed the DW APB SSI controller descriptor into their private data object. MMIO driver for instance already utilizes that design pattern. Signed-off-by: Serge Semin Reviewed-by: Andy Shevchenko Cc: Georgy Vlasov Cc: Ramil Zaripov Cc: Alexey Malahov Cc: Thomas Bogendoerfer Cc: Paul Burton Cc: Ralf Baechle Cc: Andy Shevchenko Cc: Arnd Bergmann Cc: Rob Herring Cc: linux-mips@vger.kernel.org Cc: devicetree@vger.kernel.org --- Changelog v2: - It's a new patch created as a result of more thorough driver study. --- drivers/spi/spi-dw.h | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h index 60e9e430ce7b..b6ab81e0c747 100644 --- a/drivers/spi/spi-dw.h +++ b/drivers/spi/spi-dw.h @@ -147,8 +147,6 @@ struct dw_spi { dma_addr_t dma_addr; /* phy address of the Data register */ const struct dw_spi_dma_ops *dma_ops; - /* Bus interface info */ - void *priv; #ifdef CONFIG_DEBUG_FS struct dentry *debugfs; #endif From patchwork Fri May 22 00:07:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 11564233 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 39CEB60D for ; Fri, 22 May 2020 00:08:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2CFFD20899 for ; Fri, 22 May 2020 00:08:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730562AbgEVAIm (ORCPT ); Thu, 21 May 2020 20:08:42 -0400 Received: from mail.baikalelectronics.com ([87.245.175.226]:41308 "EHLO mail.baikalelectronics.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730549AbgEVAIl (ORCPT ); Thu, 21 May 2020 20:08:41 -0400 Received: from localhost (unknown [127.0.0.1]) by mail.baikalelectronics.ru (Postfix) with ESMTP id 564D88030790; Fri, 22 May 2020 00:08:37 +0000 (UTC) X-Virus-Scanned: amavisd-new at baikalelectronics.ru Received: from mail.baikalelectronics.ru ([127.0.0.1]) by localhost (mail.baikalelectronics.ru [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bI3rmLVYnrDc; Fri, 22 May 2020 03:08:36 +0300 (MSK) From: Serge Semin To: Mark Brown CC: Serge Semin , Serge Semin , Georgy Vlasov , Ramil Zaripov , Alexey Malahov , Thomas Bogendoerfer , Paul Burton , Ralf Baechle , Arnd Bergmann , Andy Shevchenko , Rob Herring , , , Wan Ahmad Zainie , Thomas Gleixner , Jarkko Nikula , , Subject: [PATCH v4 06/16] spi: dw: Parameterize the DMA Rx/Tx burst length Date: Fri, 22 May 2020 03:07:55 +0300 Message-ID: <20200522000806.7381-7-Sergey.Semin@baikalelectronics.ru> In-Reply-To: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> References: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org It isn't good to have numeric literals in the code especially if there are multiple of them and they are related. Let's replace the Tx and Rx burst level literals with the corresponding constants. Co-developed-by: Georgy Vlasov Signed-off-by: Georgy Vlasov Co-developed-by: Ramil Zaripov Signed-off-by: Ramil Zaripov Signed-off-by: Serge Semin Cc: Alexey Malahov Cc: Thomas Bogendoerfer Cc: Paul Burton Cc: Ralf Baechle Cc: Arnd Bergmann Cc: Andy Shevchenko Cc: Rob Herring Cc: linux-mips@vger.kernel.org Cc: devicetree@vger.kernel.org --- Changelog v3: - Discard the dws->fifo_len utilization in the Tx FIFO DMA threshold setting. --- drivers/spi/spi-dw-mid.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c index c39bc8758339..1598c36c905f 100644 --- a/drivers/spi/spi-dw-mid.c +++ b/drivers/spi/spi-dw-mid.c @@ -20,7 +20,9 @@ #define WAIT_RETRIES 5 #define RX_BUSY 0 +#define RX_BURST_LEVEL 16 #define TX_BUSY 1 +#define TX_BURST_LEVEL 16 static bool mid_spi_dma_chan_filter(struct dma_chan *chan, void *param) { @@ -198,7 +200,7 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_tx(struct dw_spi *dws, memset(&txconf, 0, sizeof(txconf)); txconf.direction = DMA_MEM_TO_DEV; txconf.dst_addr = dws->dma_addr; - txconf.dst_maxburst = 16; + txconf.dst_maxburst = TX_BURST_LEVEL; txconf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; txconf.dst_addr_width = convert_dma_width(dws->n_bytes); txconf.device_fc = false; @@ -273,7 +275,7 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_rx(struct dw_spi *dws, memset(&rxconf, 0, sizeof(rxconf)); rxconf.direction = DMA_DEV_TO_MEM; rxconf.src_addr = dws->dma_addr; - rxconf.src_maxburst = 16; + rxconf.src_maxburst = RX_BURST_LEVEL; rxconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; rxconf.src_addr_width = convert_dma_width(dws->n_bytes); rxconf.device_fc = false; @@ -298,8 +300,8 @@ static int mid_spi_dma_setup(struct dw_spi *dws, struct spi_transfer *xfer) { u16 imr = 0, dma_ctrl = 0; - dw_writel(dws, DW_SPI_DMARDLR, 0xf); - dw_writel(dws, DW_SPI_DMATDLR, 0x10); + dw_writel(dws, DW_SPI_DMARDLR, RX_BURST_LEVEL - 1); + dw_writel(dws, DW_SPI_DMATDLR, TX_BURST_LEVEL); if (xfer->tx_buf) { dma_ctrl |= SPI_DMA_TDMAE; From patchwork Fri May 22 00:07:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 11564227 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9278560D for ; Fri, 22 May 2020 00:08:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 84070206BE for ; Fri, 22 May 2020 00:08:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730585AbgEVAIp (ORCPT ); Thu, 21 May 2020 20:08:45 -0400 Received: from mail.baikalelectronics.com ([87.245.175.226]:41334 "EHLO mail.baikalelectronics.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730533AbgEVAIp (ORCPT ); Thu, 21 May 2020 20:08:45 -0400 Received: from localhost (unknown [127.0.0.1]) by mail.baikalelectronics.ru (Postfix) with ESMTP id 4084280005E8; Fri, 22 May 2020 00:08:41 +0000 (UTC) X-Virus-Scanned: amavisd-new at baikalelectronics.ru Received: from mail.baikalelectronics.ru ([127.0.0.1]) by localhost (mail.baikalelectronics.ru [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Po0_OGsCYQ-u; Fri, 22 May 2020 03:08:40 +0300 (MSK) From: Serge Semin To: Mark Brown CC: Serge Semin , Serge Semin , Andy Shevchenko , Alexey Malahov , Thomas Bogendoerfer , Paul Burton , Ralf Baechle , Arnd Bergmann , Rob Herring , , , Georgy Vlasov , Ramil Zaripov , Wan Ahmad Zainie , Thomas Gleixner , Jarkko Nikula , Clement Leger , Linus Walleij , , Subject: [PATCH v4 07/16] spi: dw: Use DMA max burst to set the request thresholds Date: Fri, 22 May 2020 03:07:56 +0300 Message-ID: <20200522000806.7381-8-Sergey.Semin@baikalelectronics.ru> In-Reply-To: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> References: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Each channel of DMA controller may have a limited length of burst transaction (number of IO operations performed at ones in a single DMA client request). This parameter can be used to setup the most optimal DMA Tx/Rx data level values. In order to avoid the Tx buffer overrun we can set the DMA Tx level to be of FIFO depth minus the maximum burst transactions length. To prevent the Rx buffer underflow the DMA Rx level should be set to the maximum burst transactions length. This commit setups the DMA channels and the DW SPI DMA Tx/Rx levels in accordance with these rules. Signed-off-by: Serge Semin Reviewed-by: Andy Shevchenko Cc: Alexey Malahov Cc: Thomas Bogendoerfer Cc: Paul Burton Cc: Ralf Baechle Cc: Arnd Bergmann Cc: Andy Shevchenko Cc: Rob Herring Cc: linux-mips@vger.kernel.org Cc: devicetree@vger.kernel.org --- Changelog v3: - Use min() method to calculate the optimal burst values. --- drivers/spi/spi-dw-mid.c | 37 +++++++++++++++++++++++++++++++++---- drivers/spi/spi-dw.h | 2 ++ 2 files changed, 35 insertions(+), 4 deletions(-) diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c index 1598c36c905f..ac96b99ef226 100644 --- a/drivers/spi/spi-dw-mid.c +++ b/drivers/spi/spi-dw-mid.c @@ -35,6 +35,31 @@ static bool mid_spi_dma_chan_filter(struct dma_chan *chan, void *param) return true; } +static void mid_spi_maxburst_init(struct dw_spi *dws) +{ + struct dma_slave_caps caps; + u32 max_burst, def_burst; + int ret; + + def_burst = dws->fifo_len / 2; + + ret = dma_get_slave_caps(dws->rxchan, &caps); + if (!ret && caps.max_burst) + max_burst = caps.max_burst; + else + max_burst = RX_BURST_LEVEL; + + dws->rxburst = min(max_burst, def_burst); + + ret = dma_get_slave_caps(dws->txchan, &caps); + if (!ret && caps.max_burst) + max_burst = caps.max_burst; + else + max_burst = TX_BURST_LEVEL; + + dws->txburst = min(max_burst, def_burst); +} + static int mid_spi_dma_init_mfld(struct device *dev, struct dw_spi *dws) { struct dw_dma_slave slave = { @@ -70,6 +95,8 @@ static int mid_spi_dma_init_mfld(struct device *dev, struct dw_spi *dws) dws->master->dma_rx = dws->rxchan; dws->master->dma_tx = dws->txchan; + mid_spi_maxburst_init(dws); + return 0; free_rxchan: @@ -95,6 +122,8 @@ static int mid_spi_dma_init_generic(struct device *dev, struct dw_spi *dws) dws->master->dma_rx = dws->rxchan; dws->master->dma_tx = dws->txchan; + mid_spi_maxburst_init(dws); + return 0; } @@ -200,7 +229,7 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_tx(struct dw_spi *dws, memset(&txconf, 0, sizeof(txconf)); txconf.direction = DMA_MEM_TO_DEV; txconf.dst_addr = dws->dma_addr; - txconf.dst_maxburst = TX_BURST_LEVEL; + txconf.dst_maxburst = dws->txburst; txconf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; txconf.dst_addr_width = convert_dma_width(dws->n_bytes); txconf.device_fc = false; @@ -275,7 +304,7 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_rx(struct dw_spi *dws, memset(&rxconf, 0, sizeof(rxconf)); rxconf.direction = DMA_DEV_TO_MEM; rxconf.src_addr = dws->dma_addr; - rxconf.src_maxburst = RX_BURST_LEVEL; + rxconf.src_maxburst = dws->rxburst; rxconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; rxconf.src_addr_width = convert_dma_width(dws->n_bytes); rxconf.device_fc = false; @@ -300,8 +329,8 @@ static int mid_spi_dma_setup(struct dw_spi *dws, struct spi_transfer *xfer) { u16 imr = 0, dma_ctrl = 0; - dw_writel(dws, DW_SPI_DMARDLR, RX_BURST_LEVEL - 1); - dw_writel(dws, DW_SPI_DMATDLR, TX_BURST_LEVEL); + dw_writel(dws, DW_SPI_DMARDLR, dws->rxburst - 1); + dw_writel(dws, DW_SPI_DMATDLR, dws->fifo_len - dws->txburst); if (xfer->tx_buf) { dma_ctrl |= SPI_DMA_TDMAE; diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h index 4902f937c3d7..d0c8b7d3a5d2 100644 --- a/drivers/spi/spi-dw.h +++ b/drivers/spi/spi-dw.h @@ -141,7 +141,9 @@ struct dw_spi { /* DMA info */ struct dma_chan *txchan; + u32 txburst; struct dma_chan *rxchan; + u32 rxburst; unsigned long dma_chan_busy; dma_addr_t dma_addr; /* phy address of the Data register */ const struct dw_spi_dma_ops *dma_ops; From patchwork Fri May 22 00:08:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 11564235 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 98EFC913 for ; Fri, 22 May 2020 00:09:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8B2B520823 for ; Fri, 22 May 2020 00:09:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730368AbgEVAJI (ORCPT ); Thu, 21 May 2020 20:09:08 -0400 Received: from mail.baikalelectronics.com ([87.245.175.226]:41478 "EHLO mail.baikalelectronics.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730278AbgEVAJI (ORCPT ); Thu, 21 May 2020 20:09:08 -0400 Received: from localhost (unknown [127.0.0.1]) by mail.baikalelectronics.ru (Postfix) with ESMTP id AD53D803087B; Fri, 22 May 2020 00:09:05 +0000 (UTC) X-Virus-Scanned: amavisd-new at baikalelectronics.ru Received: from mail.baikalelectronics.ru ([127.0.0.1]) by localhost (mail.baikalelectronics.ru [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id f4R0N35N_5n6; Fri, 22 May 2020 03:09:05 +0300 (MSK) From: Serge Semin To: Mark Brown CC: Serge Semin , Serge Semin , Georgy Vlasov , Ramil Zaripov , Andy Shevchenko , Alexey Malahov , Thomas Bogendoerfer , Paul Burton , Ralf Baechle , Rob Herring , Arnd Bergmann , , , John Garry , Chuanhong Guo , Masahisa Kojima , Gregory CLEMENT , Chris Packham , Tomer Maimon , Krzysztof Kozlowski , , Subject: [PATCH v4 11/16] spi: dw: Remove DW DMA code dependency from DW_DMAC_PCI Date: Fri, 22 May 2020 03:08:00 +0300 Message-ID: <20200522000806.7381-12-Sergey.Semin@baikalelectronics.ru> In-Reply-To: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> References: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Since there is a generic method available to initialize the DW SPI DMA interface on any DT and ACPI-based platforms, which in general can be designed with not only DW DMAC but with any DMA engine on board, we can freely remove the CONFIG_DW_DMAC_PCI config from dependency list of CONFIG_SPI_DW_DMA. Especially seeing that we don't use anything DW DMAC specific in the new driver. Co-developed-by: Georgy Vlasov Signed-off-by: Georgy Vlasov Co-developed-by: Ramil Zaripov Signed-off-by: Ramil Zaripov Signed-off-by: Serge Semin Reviewed-by: Andy Shevchenko Cc: Alexey Malahov Cc: Thomas Bogendoerfer Cc: Paul Burton Cc: Ralf Baechle Cc: Rob Herring Cc: Arnd Bergmann Cc: Andy Shevchenko Cc: linux-mips@vger.kernel.org Cc: devicetree@vger.kernel.org --- drivers/spi/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 03b061975f70..6a84f3dad35c 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -228,7 +228,7 @@ config SPI_DESIGNWARE config SPI_DW_DMA bool "DMA support for DW SPI controller" - depends on SPI_DESIGNWARE && DW_DMAC_PCI + depends on SPI_DESIGNWARE config SPI_DW_PCI tristate "PCI interface driver for DW SPI core" From patchwork Fri May 22 00:08:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 11564241 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 064AF60D for ; Fri, 22 May 2020 00:09:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ED2732078B for ; Fri, 22 May 2020 00:09:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730652AbgEVAJL (ORCPT ); Thu, 21 May 2020 20:09:11 -0400 Received: from mail.baikalelectronics.com ([87.245.175.226]:41502 "EHLO mail.baikalelectronics.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730554AbgEVAJK (ORCPT ); Thu, 21 May 2020 20:09:10 -0400 Received: from localhost (unknown [127.0.0.1]) by mail.baikalelectronics.ru (Postfix) with ESMTP id BEFF88030790; Fri, 22 May 2020 00:09:07 +0000 (UTC) X-Virus-Scanned: amavisd-new at baikalelectronics.ru Received: from mail.baikalelectronics.ru ([127.0.0.1]) by localhost (mail.baikalelectronics.ru [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8aP5j2B4pers; Fri, 22 May 2020 03:09:07 +0300 (MSK) From: Serge Semin To: Mark Brown CC: Serge Semin , Serge Semin , Georgy Vlasov , Ramil Zaripov , Andy Shevchenko , Alexey Malahov , Thomas Bogendoerfer , Paul Burton , Ralf Baechle , Arnd Bergmann , Rob Herring , , , John Garry , Chuanhong Guo , Joe Perches , Chris Packham , Tomer Maimon , Masahisa Kojima , Krzysztof Kozlowski , , Subject: [PATCH v4 12/16] spi: dw: Add DW SPI DMA/PCI/MMIO dependency on the DW SPI core Date: Fri, 22 May 2020 03:08:01 +0300 Message-ID: <20200522000806.7381-13-Sergey.Semin@baikalelectronics.ru> In-Reply-To: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> References: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Seeing all of the DW SPI driver components like DW SPI DMA/PCI/MMIO depend on the DW SPI core code it's better to use the if-endif conditional kernel config statement to signify that common dependency. Co-developed-by: Georgy Vlasov Signed-off-by: Georgy Vlasov Co-developed-by: Ramil Zaripov Signed-off-by: Ramil Zaripov Signed-off-by: Serge Semin Reviewed-by: Andy Shevchenko Cc: Alexey Malahov Cc: Thomas Bogendoerfer Cc: Paul Burton Cc: Ralf Baechle Cc: Arnd Bergmann Cc: Andy Shevchenko Cc: Rob Herring Cc: linux-mips@vger.kernel.org Cc: devicetree@vger.kernel.org --- drivers/spi/Kconfig | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 6a84f3dad35c..3cdf8310d185 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -226,17 +226,20 @@ config SPI_DESIGNWARE help general driver for SPI controller core from DesignWare +if SPI_DESIGNWARE + config SPI_DW_DMA bool "DMA support for DW SPI controller" - depends on SPI_DESIGNWARE config SPI_DW_PCI tristate "PCI interface driver for DW SPI core" - depends on SPI_DESIGNWARE && PCI + depends on PCI config SPI_DW_MMIO tristate "Memory-mapped io interface driver for DW SPI core" - depends on SPI_DESIGNWARE + depends on HAS_IOMEM + +endif config SPI_DLN2 tristate "Diolan DLN-2 USB SPI adapter" From patchwork Fri May 22 00:08:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 11564243 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id F262460D for ; Fri, 22 May 2020 00:09:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E28FE207D8 for ; Fri, 22 May 2020 00:09:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730663AbgEVAJW (ORCPT ); Thu, 21 May 2020 20:09:22 -0400 Received: from mail.baikalelectronics.com ([87.245.175.226]:41566 "EHLO mail.baikalelectronics.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730255AbgEVAJW (ORCPT ); Thu, 21 May 2020 20:09:22 -0400 Received: from localhost (unknown [127.0.0.1]) by mail.baikalelectronics.ru (Postfix) with ESMTP id 9DA118029EC9; Fri, 22 May 2020 00:09:19 +0000 (UTC) X-Virus-Scanned: amavisd-new at baikalelectronics.ru Received: from mail.baikalelectronics.ru ([127.0.0.1]) by localhost (mail.baikalelectronics.ru [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id WRc5ToI_dDpy; Fri, 22 May 2020 03:09:19 +0300 (MSK) From: Serge Semin To: Mark Brown CC: Serge Semin , Serge Semin , Georgy Vlasov , Ramil Zaripov , Andy Shevchenko , Alexey Malahov , Thomas Bogendoerfer , Paul Burton , Ralf Baechle , Arnd Bergmann , Rob Herring , , , Wan Ahmad Zainie , Gareth Williams , Thomas Gleixner , Phil Edworthy , Jarkko Nikula , YueHaibing , Stephen Boyd , , Subject: [PATCH v4 14/16] spi: dw: Add DMA support to the DW SPI MMIO driver Date: Fri, 22 May 2020 03:08:03 +0300 Message-ID: <20200522000806.7381-15-Sergey.Semin@baikalelectronics.ru> In-Reply-To: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> References: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Since the common code in the spi-dw-dma.c driver is ready to be used by the MMIO driver and now provides a method to generically (on any DT or ACPI-based platforms) retrieve the Tx/Rx DMA channel handlers, we can use it and a set of the common DW SPI DMA callbacks to enable DMA at least for generic "snps,dw-apb-ssi" and "snps,dwc-ssi-1.01a" devices. Co-developed-by: Georgy Vlasov Signed-off-by: Georgy Vlasov Co-developed-by: Ramil Zaripov Signed-off-by: Ramil Zaripov Signed-off-by: Serge Semin Reviewed-by: Andy Shevchenko Cc: Alexey Malahov Cc: Thomas Bogendoerfer Cc: Paul Burton Cc: Ralf Baechle Cc: Arnd Bergmann Cc: Andy Shevchenko Cc: Rob Herring Cc: linux-mips@vger.kernel.org Cc: devicetree@vger.kernel.org --- drivers/spi/spi-dw-mmio.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c index 0894b4c09496..e23d0c53a664 100644 --- a/drivers/spi/spi-dw-mmio.c +++ b/drivers/spi/spi-dw-mmio.c @@ -149,6 +149,8 @@ static int dw_spi_dw_apb_init(struct platform_device *pdev, /* Register hook to configure CTRLR0 */ dwsmmio->dws.update_cr0 = dw_spi_update_cr0; + dw_spi_dma_setup_generic(&dwsmmio->dws); + return 0; } @@ -158,6 +160,8 @@ static int dw_spi_dwc_ssi_init(struct platform_device *pdev, /* Register hook to configure CTRLR0 */ dwsmmio->dws.update_cr0 = dw_spi_update_cr0_v1_01a; + dw_spi_dma_setup_generic(&dwsmmio->dws); + return 0; } From patchwork Fri May 22 00:08:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 11564247 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EA55A60D for ; Fri, 22 May 2020 00:09:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D8C20207D8 for ; Fri, 22 May 2020 00:09:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730255AbgEVAJh (ORCPT ); Thu, 21 May 2020 20:09:37 -0400 Received: from mail.baikalelectronics.com ([87.245.175.226]:41640 "EHLO mail.baikalelectronics.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730225AbgEVAJh (ORCPT ); Thu, 21 May 2020 20:09:37 -0400 Received: from localhost (unknown [127.0.0.1]) by mail.baikalelectronics.ru (Postfix) with ESMTP id 1CA898030790; Fri, 22 May 2020 00:09:31 +0000 (UTC) X-Virus-Scanned: amavisd-new at baikalelectronics.ru Received: from mail.baikalelectronics.ru ([127.0.0.1]) by localhost (mail.baikalelectronics.ru [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id dqPEJ_MjpqpO; Fri, 22 May 2020 03:09:29 +0300 (MSK) From: Serge Semin To: Mark Brown , Rob Herring CC: Serge Semin , Serge Semin , Georgy Vlasov , Ramil Zaripov , Alexey Malahov , Thomas Bogendoerfer , Paul Burton , Ralf Baechle , Arnd Bergmann , Andy Shevchenko , , Wan Ahmad Zainie , Gareth Williams , , , Subject: [PATCH v4 16/16] dt-bindings: spi: Convert DW SPI binding to DT schema Date: Fri, 22 May 2020 03:08:05 +0300 Message-ID: <20200522000806.7381-17-Sergey.Semin@baikalelectronics.ru> In-Reply-To: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> References: <20200522000806.7381-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Modern device tree bindings are supposed to be created as YAML-files in accordance with dt-schema. This commit replaces two DW SPI legacy bare text bindings with YAML file. As before the bindings file states that the corresponding dts node is supposed to be compatible either with generic DW APB SSI controller or with Microsemi/Amazon/Renesas/Intel vendors-specific controllers, to have registers, interrupts and clocks properties. Though in case of Microsemi version of the controller there must be two registers resources specified. Properties like clock-names, reg-io-width, cs-gpio, num-cs, DMA and slave device sub-nodes are optional. Signed-off-by: Serge Semin Cc: Georgy Vlasov Cc: Ramil Zaripov Cc: Alexey Malahov Cc: Thomas Bogendoerfer Cc: Paul Burton Cc: Ralf Baechle Cc: Arnd Bergmann Cc: Andy Shevchenko Cc: linux-mips@vger.kernel.org Reviewed-by: Rob Herring --- .../bindings/spi/snps,dw-apb-ssi.txt | 44 ------ .../bindings/spi/snps,dw-apb-ssi.yaml | 127 ++++++++++++++++++ .../devicetree/bindings/spi/spi-dw.txt | 24 ---- 3 files changed, 127 insertions(+), 68 deletions(-) delete mode 100644 Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt create mode 100644 Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml delete mode 100644 Documentation/devicetree/bindings/spi/spi-dw.txt diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt deleted file mode 100644 index 020e3168ee41..000000000000 --- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.txt +++ /dev/null @@ -1,44 +0,0 @@ -Synopsys DesignWare AMBA 2.0 Synchronous Serial Interface. - -Required properties: -- compatible : "snps,dw-apb-ssi" or "mscc,-spi", where soc is "ocelot" or - "jaguar2", or "amazon,alpine-dw-apb-ssi", or "snps,dwc-ssi-1.01a" or - "intel,keembay-ssi" -- reg : The register base for the controller. For "mscc,-spi", a second - register set is required (named ICPU_CFG:SPI_MST) -- interrupts : One interrupt, used by the controller. -- #address-cells : <1>, as required by generic SPI binding. -- #size-cells : <0>, also as required by generic SPI binding. -- clocks : phandles for the clocks, see the description of clock-names below. - The phandle for the "ssi_clk" is required. The phandle for the "pclk" clock - is optional. If a single clock is specified but no clock-name, it is the - "ssi_clk" clock. If both clocks are listed, the "ssi_clk" must be first. - -Optional properties: -- clock-names : Contains the names of the clocks: - "ssi_clk", for the core clock used to generate the external SPI clock. - "pclk", the interface clock, required for register access. If a clock domain - used to enable this clock then it should be named "pclk_clkdomain". -- cs-gpios : Specifies the gpio pins to be used for chipselects. -- num-cs : The number of chipselects. If omitted, this will default to 4. -- reg-io-width : The I/O register width (in bytes) implemented by this - device. Supported values are 2 or 4 (the default). -- dmas : Phandle + identifiers of Tx and Rx DMA channels. -- dma-names : Contains the names of the DMA channels. Must be "tx" and "rx". - -Child nodes as per the generic SPI binding. - -Example: - - spi@fff00000 { - compatible = "snps,dw-apb-ssi"; - reg = <0xfff00000 0x1000>; - interrupts = <0 154 4>; - #address-cells = <1>; - #size-cells = <0>; - clocks = <&spi_m_clk>; - num-cs = <2>; - cs-gpios = <&gpio0 13 0>, - <&gpio0 14 0>; - }; - diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml new file mode 100644 index 000000000000..1fcab6415136 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml @@ -0,0 +1,127 @@ +# SPDX-License-Identifier: GPL-2.0-only +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/spi/snps,dw-apb-ssi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Synopsys DesignWare AMBA 2.0 Synchronous Serial Interface + +maintainers: + - Mark Brown + +allOf: + - $ref: "spi-controller.yaml#" + - if: + properties: + compatible: + contains: + enum: + - mscc,ocelot-spi + - mscc,jaguar2-spi + then: + properties: + reg: + minItems: 2 + +properties: + compatible: + oneOf: + - description: Generic DW SPI Controller + enum: + - snps,dw-apb-ssi + - snps,dwc-ssi-1.01a + - description: Microsemi Ocelot/Jaguar2 SoC SPI Controller + items: + - enum: + - mscc,ocelot-spi + - mscc,jaguar2-spi + - const: snps,dw-apb-ssi + - description: Amazon Alpine SPI Controller + const: amazon,alpine-dw-apb-ssi + - description: Renesas RZ/N1 SPI Controller + items: + - const: renesas,rzn1-spi + - const: snps,dw-apb-ssi + - description: Intel Keem Bay SPI Controller + const: intel,keembay-ssi + + reg: + minItems: 1 + items: + - description: DW APB SSI controller memory mapped registers + - description: SPI MST region map + + interrupts: + maxItems: 1 + + clocks: + minItems: 1 + items: + - description: SPI Controller reference clock source + - description: APB interface clock source + + clock-names: + minItems: 1 + items: + - const: ssi_clk + - const: pclk + + reg-io-width: + $ref: /schemas/types.yaml#/definitions/uint32 + description: I/O register width (in bytes) implemented by this device + default: 4 + enum: [ 2, 4 ] + + num-cs: + default: 4 + minimum: 1 + maximum: 4 + + dmas: + items: + - description: TX DMA Channel + - description: RX DMA Channel + + dma-names: + items: + - const: tx + - const: rx + +patternProperties: + "^.*@[0-9a-f]+$": + type: object + properties: + reg: + minimum: 0 + maximum: 3 + + spi-rx-bus-width: + const: 1 + + spi-tx-bus-width: + const: 1 + +unevaluatedProperties: false + +required: + - compatible + - reg + - "#address-cells" + - "#size-cells" + - interrupts + - clocks + +examples: + - | + spi@fff00000 { + compatible = "snps,dw-apb-ssi"; + reg = <0xfff00000 0x1000>; + #address-cells = <1>; + #size-cells = <0>; + interrupts = <0 154 4>; + clocks = <&spi_m_clk>; + num-cs = <2>; + cs-gpios = <&gpio0 13 0>, + <&gpio0 14 0>; + }; +... diff --git a/Documentation/devicetree/bindings/spi/spi-dw.txt b/Documentation/devicetree/bindings/spi/spi-dw.txt deleted file mode 100644 index 7b63ed601990..000000000000 --- a/Documentation/devicetree/bindings/spi/spi-dw.txt +++ /dev/null @@ -1,24 +0,0 @@ -Synopsys DesignWare SPI master - -Required properties: -- compatible: should be "snps,designware-spi" -- #address-cells: see spi-bus.txt -- #size-cells: see spi-bus.txt -- reg: address and length of the spi master registers -- interrupts: should contain one interrupt -- clocks: spi clock phandle -- num-cs: see spi-bus.txt - -Optional properties: -- cs-gpios: see spi-bus.txt - -Example: - -spi: spi@4020a000 { - compatible = "snps,designware-spi"; - interrupts = <11 1>; - reg = <0x4020a000 0x1000>; - clocks = <&pclk>; - num-cs = <2>; - cs-gpios = <&banka 0 0>; -};