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801185efa2
In commit 8caab75fd2 ("spi: Generalize SPI "master" to "controller"")
some functions and struct members were renamed. To not break all drivers
compatibility macros were provided.
To be able to remove these compatibility macros push the renaming into
this driver.
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/b3d724ca2b641f1d717a7ddb9810bdf27168dc35.1707324794.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
162 lines
4.1 KiB
C
162 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Freescale SPI/eSPI controller driver library.
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*
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* Maintainer: Kumar Gala
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*
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* Copyright (C) 2006 Polycom, Inc.
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*
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* CPM SPI and QE buffer descriptors mode support:
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* Copyright (c) 2009 MontaVista Software, Inc.
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* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
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*
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* Copyright 2010 Freescale Semiconductor, Inc.
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*/
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#include <linux/dma-mapping.h>
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#include <linux/fsl_devices.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/spi/spi.h>
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#ifdef CONFIG_FSL_SOC
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#include <sysdev/fsl_soc.h>
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#endif
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#include "spi-fsl-lib.h"
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#define MPC8XXX_SPI_RX_BUF(type) \
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void mpc8xxx_spi_rx_buf_##type(u32 data, struct mpc8xxx_spi *mpc8xxx_spi) \
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{ \
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type *rx = mpc8xxx_spi->rx; \
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*rx++ = (type)(data >> mpc8xxx_spi->rx_shift); \
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mpc8xxx_spi->rx = rx; \
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} \
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EXPORT_SYMBOL_GPL(mpc8xxx_spi_rx_buf_##type);
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#define MPC8XXX_SPI_TX_BUF(type) \
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u32 mpc8xxx_spi_tx_buf_##type(struct mpc8xxx_spi *mpc8xxx_spi) \
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{ \
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u32 data; \
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const type *tx = mpc8xxx_spi->tx; \
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if (!tx) \
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return 0; \
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data = *tx++ << mpc8xxx_spi->tx_shift; \
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mpc8xxx_spi->tx = tx; \
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return data; \
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} \
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EXPORT_SYMBOL_GPL(mpc8xxx_spi_tx_buf_##type);
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MPC8XXX_SPI_RX_BUF(u8)
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MPC8XXX_SPI_RX_BUF(u16)
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MPC8XXX_SPI_RX_BUF(u32)
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MPC8XXX_SPI_TX_BUF(u8)
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MPC8XXX_SPI_TX_BUF(u16)
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MPC8XXX_SPI_TX_BUF(u32)
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struct mpc8xxx_spi_probe_info *to_of_pinfo(struct fsl_spi_platform_data *pdata)
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{
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return container_of(pdata, struct mpc8xxx_spi_probe_info, pdata);
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}
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EXPORT_SYMBOL_GPL(to_of_pinfo);
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const char *mpc8xxx_spi_strmode(unsigned int flags)
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{
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if (flags & SPI_QE_CPU_MODE) {
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return "QE CPU";
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} else if (flags & SPI_CPM_MODE) {
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if (flags & SPI_QE)
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return "QE";
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else if (flags & SPI_CPM2)
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return "CPM2";
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else
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return "CPM1";
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}
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return "CPU";
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}
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EXPORT_SYMBOL_GPL(mpc8xxx_spi_strmode);
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void mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
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unsigned int irq)
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{
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struct fsl_spi_platform_data *pdata = dev_get_platdata(dev);
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struct spi_controller *ctlr;
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struct mpc8xxx_spi *mpc8xxx_spi;
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ctlr = dev_get_drvdata(dev);
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/* the spi->mode bits understood by this driver: */
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ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH
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| SPI_LSB_FIRST | SPI_LOOP;
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ctlr->dev.of_node = dev->of_node;
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mpc8xxx_spi = spi_controller_get_devdata(ctlr);
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mpc8xxx_spi->dev = dev;
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mpc8xxx_spi->get_rx = mpc8xxx_spi_rx_buf_u8;
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mpc8xxx_spi->get_tx = mpc8xxx_spi_tx_buf_u8;
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mpc8xxx_spi->flags = pdata->flags;
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mpc8xxx_spi->spibrg = pdata->sysclk;
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mpc8xxx_spi->irq = irq;
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mpc8xxx_spi->rx_shift = 0;
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mpc8xxx_spi->tx_shift = 0;
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ctlr->bus_num = pdata->bus_num;
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ctlr->num_chipselect = pdata->max_chipselect;
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init_completion(&mpc8xxx_spi->done);
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}
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EXPORT_SYMBOL_GPL(mpc8xxx_spi_probe);
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int of_mpc8xxx_spi_probe(struct platform_device *ofdev)
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{
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struct device *dev = &ofdev->dev;
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struct device_node *np = ofdev->dev.of_node;
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struct mpc8xxx_spi_probe_info *pinfo;
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struct fsl_spi_platform_data *pdata;
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const void *prop;
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int ret = -ENOMEM;
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pinfo = devm_kzalloc(&ofdev->dev, sizeof(*pinfo), GFP_KERNEL);
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if (!pinfo)
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return ret;
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pdata = &pinfo->pdata;
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dev->platform_data = pdata;
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/* Allocate bus num dynamically. */
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pdata->bus_num = -1;
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#ifdef CONFIG_FSL_SOC
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/* SPI controller is either clocked from QE or SoC clock. */
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pdata->sysclk = get_brgfreq();
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if (pdata->sysclk == -1) {
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pdata->sysclk = fsl_get_sys_freq();
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if (pdata->sysclk == -1)
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return -ENODEV;
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}
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#else
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ret = of_property_read_u32(np, "clock-frequency", &pdata->sysclk);
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if (ret)
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return ret;
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#endif
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prop = of_get_property(np, "mode", NULL);
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if (prop && !strcmp(prop, "cpu-qe"))
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pdata->flags = SPI_QE_CPU_MODE;
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else if (prop && !strcmp(prop, "qe"))
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pdata->flags = SPI_CPM_MODE | SPI_QE;
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else if (of_device_is_compatible(np, "fsl,cpm2-spi"))
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pdata->flags = SPI_CPM_MODE | SPI_CPM2;
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else if (of_device_is_compatible(np, "fsl,cpm1-spi"))
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pdata->flags = SPI_CPM_MODE | SPI_CPM1;
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return 0;
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}
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EXPORT_SYMBOL_GPL(of_mpc8xxx_spi_probe);
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MODULE_LICENSE("GPL");
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