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Received: from lucky1.263xmail.com ([211.157.147.132]) by desiato.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1lszoG-007IV7-0M; Tue, 15 Jun 2021 03:32:24 +0000 Received: from localhost (unknown [192.168.167.16]) by lucky1.263xmail.com (Postfix) with ESMTP id 87735F4E69; Tue, 15 Jun 2021 11:32:20 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-SKE-CHECKED: 1 X-ANTISPAM-LEVEL: 2 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P16485T139918414178048S1623727934928454_; Tue, 15 Jun 2021 11:32:20 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: X-RL-SENDER: jon.lin@rock-chips.com X-SENDER: jon.lin@rock-chips.com X-LOGIN-NAME: jon.lin@rock-chips.com X-FST-TO: broonie@kernel.org X-RCPT-COUNT: 9 X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-System-Flag: 0 From: Jon Lin To: broonie@kernel.org Cc: jon.lin@rock-chips.com, heiko@sntech.de, robh+dt@kernel.org, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v8 4/6] spi: rockchip: Wait for STB status in slave mode tx_xfer Date: Tue, 15 Jun 2021 11:32:11 +0800 Message-Id: <20210615033213.14241-5-jon.lin@rock-chips.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210615033213.14241-1-jon.lin@rock-chips.com> References: <20210615033213.14241-1-jon.lin@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210615_043223_186780_C14A8B6C X-CRM114-Status: GOOD ( 13.58 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org After ROCKCHIP_SPI_VER2_TYPE2, SR->STB is a more accurate judgment bit for spi slave transmition. Signed-off-by: Jon Lin --- Changes in v8: None Changes in v7: None Changes in v6: None Changes in v5: None Changes in v4: None Changes in v3: None drivers/spi/spi-rockchip.c | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index 0887b19ef3ad..950d3bce443b 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -116,13 +116,14 @@ #define BAUDR_SCKDV_MIN 2 #define BAUDR_SCKDV_MAX 65534 -/* Bit fields in SR, 5bit */ -#define SR_MASK 0x1f +/* Bit fields in SR, 6bit */ +#define SR_MASK 0x3f #define SR_BUSY (1 << 0) #define SR_TF_FULL (1 << 1) #define SR_TF_EMPTY (1 << 2) #define SR_RF_EMPTY (1 << 3) #define SR_RF_FULL (1 << 4) +#define SR_SLAVE_TX_BUSY (1 << 5) /* Bit fields in ISR, IMR, ISR, RISR, 5bit */ #define INT_MASK 0x1f @@ -197,13 +198,19 @@ static inline void spi_enable_chip(struct rockchip_spi *rs, bool enable) writel_relaxed((enable ? 1U : 0U), rs->regs + ROCKCHIP_SPI_SSIENR); } -static inline void wait_for_idle(struct rockchip_spi *rs) +static inline void wait_for_tx_idle(struct rockchip_spi *rs, bool slave_mode) { unsigned long timeout = jiffies + msecs_to_jiffies(5); do { - if (!(readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_BUSY)) - return; + if (slave_mode) { + if (!(readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_SLAVE_TX_BUSY) && + !((readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_BUSY))) + return; + } else { + if (!(readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_BUSY)) + return; + } } while (!time_after(jiffies, timeout)); dev_warn(rs->dev, "spi controller is in busy state!\n"); @@ -383,7 +390,7 @@ static void rockchip_spi_dma_txcb(void *data) return; /* Wait until the FIFO data completely. */ - wait_for_idle(rs); + wait_for_tx_idle(rs, ctlr->slave); spi_enable_chip(rs, false); spi_finalize_current_transfer(ctlr); @@ -545,7 +552,7 @@ static int rockchip_spi_config(struct rockchip_spi *rs, else writel_relaxed(rs->fifo_len / 2 - 1, rs->regs + ROCKCHIP_SPI_RXFTLR); - writel_relaxed(rs->fifo_len / 2, rs->regs + ROCKCHIP_SPI_DMATDLR); + writel_relaxed(rs->fifo_len / 2 - 1, rs->regs + ROCKCHIP_SPI_DMATDLR); writel_relaxed(rockchip_spi_calc_burst_size(xfer->len / rs->n_bytes) - 1, rs->regs + ROCKCHIP_SPI_DMARDLR); writel_relaxed(dmacr, rs->regs + ROCKCHIP_SPI_DMACR);