From patchwork Fri Feb 15 15:52:23 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Larsson X-Patchwork-Id: 2148751 Return-Path: X-Original-To: patchwork-spi-devel-general@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from lists.sourceforge.net (lists.sourceforge.net [216.34.181.88]) by patchwork1.kernel.org (Postfix) with ESMTP id C6E4D3FDF1 for ; Fri, 15 Feb 2013 15:52:58 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=sfs-ml-4.v29.ch3.sourceforge.com) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1U6Nas-0006cp-4H; Fri, 15 Feb 2013 15:52:58 +0000 Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1U6Nap-0006c4-SO for spi-devel-general@lists.sourceforge.net; Fri, 15 Feb 2013 15:52:55 +0000 X-ACL-Warn: Received: from vsp-authed02.binero.net ([195.74.38.226] helo=vsp-authed-02-02.binero.net) by sog-mx-3.v43.ch3.sourceforge.com with smtp (Exim 4.76) id 1U6Naj-0007uM-RJ for spi-devel-general@lists.sourceforge.net; Fri, 15 Feb 2013 15:52:55 +0000 Received: from smtp01.binero.se (unknown [195.74.38.28]) by vsp-authed-02-02.binero.net (Halon Mail Gateway) with ESMTP; Fri, 15 Feb 2013 16:52:37 +0100 (CET) Received: from localhost.localdomain (static-92-33-28-242.sme.bredbandsbolaget.se [92.33.28.242]) (Authenticated sender: andreas@gaisler.com) by smtp-05-01.atm.binero.net (Postfix) with ESMTPA id 160363A166; Fri, 15 Feb 2013 16:52:37 +0100 (CET) From: Andreas Larsson To: Grant Likely Subject: [PATCH v3 3/7] spi: spi-fsl-spi: Move setting non-zero tx and rx shifts to a function accessed by a function pointer Date: Fri, 15 Feb 2013 16:52:23 +0100 Message-Id: <1360943547-2186-4-git-send-email-andreas@gaisler.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1360943547-2186-1-git-send-email-andreas@gaisler.com> References: <1360943547-2186-1-git-send-email-andreas@gaisler.com> X-Spam-Score: 0.0 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [195.74.38.226 listed in list.dnswl.org] X-Headers-End: 1U6Naj-0007uM-RJ Cc: Joakim Tjernlund , software@gaisler.com, Mark Brown , linux-kernel@vger.kernel.org, Anton Vorontsov , Peter Korsgaard , spi-devel-general@lists.sourceforge.net, Mingkai Hu X-BeenThere: spi-devel-general@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: Linux SPI core/device drivers discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: spi-devel-general-bounces@lists.sourceforge.net Acked-by: Anton Vorontsov Signed-off-by: Andreas Larsson --- drivers/spi/spi-fsl-lib.h | 5 ++++ drivers/spi/spi-fsl-spi.c | 51 +++++++++++++++++++++++++++----------------- 2 files changed, 36 insertions(+), 20 deletions(-) diff --git a/drivers/spi/spi-fsl-lib.h b/drivers/spi/spi-fsl-lib.h index d785595..eae54b6 100644 --- a/drivers/spi/spi-fsl-lib.h +++ b/drivers/spi/spi-fsl-lib.h @@ -69,6 +69,11 @@ struct mpc8xxx_spi { unsigned int flags; +#ifdef CONFIG_SPI_FSL_SPI + void (*set_shifts)(u32 *rx_shift, u32 *tx_shift, + int bits_per_word, int msb_first); +#endif + struct workqueue_struct *workqueue; struct work_struct work; diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c index 527ac35..aff8bdd 100644 --- a/drivers/spi/spi-fsl-spi.c +++ b/drivers/spi/spi-fsl-spi.c @@ -91,6 +91,25 @@ static void fsl_spi_chipselect(struct spi_device *spi, int value) } } +static void fsl_spi_qe_cpu_set_shifts(u32 *rx_shift, u32 *tx_shift, + int bits_per_word, int msb_first) +{ + *rx_shift = 0; + *tx_shift = 0; + if (msb_first) { + if (bits_per_word <= 8) { + *rx_shift = 16; + *tx_shift = 24; + } else if (bits_per_word <= 16) { + *rx_shift = 16; + *tx_shift = 16; + } + } else { + if (bits_per_word <= 8) + *rx_shift = 8; + } +} + static int mspi_apply_cpu_mode_quirks(struct spi_mpc8xxx_cs *cs, struct spi_device *spi, struct mpc8xxx_spi *mpc8xxx_spi, @@ -101,31 +120,20 @@ static int mspi_apply_cpu_mode_quirks(struct spi_mpc8xxx_cs *cs, if (bits_per_word <= 8) { cs->get_rx = mpc8xxx_spi_rx_buf_u8; cs->get_tx = mpc8xxx_spi_tx_buf_u8; - if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) { - cs->rx_shift = 16; - cs->tx_shift = 24; - } } else if (bits_per_word <= 16) { cs->get_rx = mpc8xxx_spi_rx_buf_u16; cs->get_tx = mpc8xxx_spi_tx_buf_u16; - if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) { - cs->rx_shift = 16; - cs->tx_shift = 16; - } } else if (bits_per_word <= 32) { cs->get_rx = mpc8xxx_spi_rx_buf_u32; cs->get_tx = mpc8xxx_spi_tx_buf_u32; } else return -EINVAL; - if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE && - spi->mode & SPI_LSB_FIRST) { - cs->tx_shift = 0; - if (bits_per_word <= 8) - cs->rx_shift = 8; - else - cs->rx_shift = 0; - } + if (mpc8xxx_spi->set_shifts) + mpc8xxx_spi->set_shifts(&cs->rx_shift, &cs->tx_shift, + bits_per_word, + !(spi->mode & SPI_LSB_FIRST)); + mpc8xxx_spi->rx_shift = cs->rx_shift; mpc8xxx_spi->tx_shift = cs->tx_shift; mpc8xxx_spi->get_rx = cs->get_rx; @@ -487,10 +495,13 @@ static struct spi_master * fsl_spi_probe(struct device *dev, if (ret) goto err_cpm_init; - if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) { - mpc8xxx_spi->rx_shift = 16; - mpc8xxx_spi->tx_shift = 24; - } + if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE) + mpc8xxx_spi->set_shifts = fsl_spi_qe_cpu_set_shifts; + + if (mpc8xxx_spi->set_shifts) + /* 8 bits per word and MSB first */ + mpc8xxx_spi->set_shifts(&mpc8xxx_spi->rx_shift, + &mpc8xxx_spi->tx_shift, 8, 1); mpc8xxx_spi->reg_base = ioremap(mem->start, resource_size(mem)); if (mpc8xxx_spi->reg_base == NULL) {