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Release 4.14 drivers/spi/spi-fsl-lib.c

Directory: drivers/spi
/*
 * Freescale SPI/eSPI controller driver library.
 *
 * Maintainer: Kumar Gala
 *
 * Copyright (C) 2006 Polycom, Inc.
 *
 * CPM SPI and QE buffer descriptors mode support:
 * Copyright (c) 2009  MontaVista Software, Inc.
 * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
 *
 * Copyright 2010 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */
#include <linux/dma-mapping.h>
#include <linux/fsl_devices.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/spi/spi.h>
#ifdef CONFIG_FSL_SOC
#include <sysdev/fsl_soc.h>
#endif

#include "spi-fsl-lib.h"


#define MPC8XXX_SPI_RX_BUF(type) 					  \
void mpc8xxx_spi_rx_buf_##type(u32 data, struct mpc8xxx_spi *mpc8xxx_spi) \
{                                                                         \
        type *rx = mpc8xxx_spi->rx;                                       \
        *rx++ = (type)(data >> mpc8xxx_spi->rx_shift);                    \
        mpc8xxx_spi->rx = rx;                                             \
}                                                                         \
EXPORT_SYMBOL_GPL(mpc8xxx_spi_rx_buf_##type);


#define MPC8XXX_SPI_TX_BUF(type)				\
u32 mpc8xxx_spi_tx_buf_##type(struct mpc8xxx_spi *mpc8xxx_spi)  \
{                                                               \
        u32 data;                                               \
        const type *tx = mpc8xxx_spi->tx;                       \
        if (!tx)                                                \
                return 0;                                       \
        data = *tx++ << mpc8xxx_spi->tx_shift;                  \
        mpc8xxx_spi->tx = tx;                                   \
        return data;                                            \
}                                                               \
EXPORT_SYMBOL_GPL(mpc8xxx_spi_tx_buf_##type);


MPC8XXX_SPI_RX_BUF(u8)
MPC8XXX_SPI_RX_BUF(u16)
MPC8XXX_SPI_RX_BUF(u32)
MPC8XXX_SPI_TX_BUF(u8)
MPC8XXX_SPI_TX_BUF(u16)
MPC8XXX_SPI_TX_BUF(u32)


struct mpc8xxx_spi_probe_info *to_of_pinfo(struct fsl_spi_platform_data *pdata) { return container_of(pdata, struct mpc8xxx_spi_probe_info, pdata); }

Contributors

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Mingkai Hu23100.00%1100.00%
Total23100.00%1100.00%

EXPORT_SYMBOL_GPL(to_of_pinfo);
const char *mpc8xxx_spi_strmode(unsigned int flags) { if (flags & SPI_QE_CPU_MODE) { return "QE CPU"; } else if (flags & SPI_CPM_MODE) { if (flags & SPI_QE) return "QE"; else if (flags & SPI_CPM2) return "CPM2"; else return "CPM1"; } return "CPU"; }

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Mingkai Hu57100.00%1100.00%
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EXPORT_SYMBOL_GPL(mpc8xxx_spi_strmode);
void mpc8xxx_spi_probe(struct device *dev, struct resource *mem, unsigned int irq) { struct fsl_spi_platform_data *pdata = dev_get_platdata(dev); struct spi_master *master; struct mpc8xxx_spi *mpc8xxx_spi; master = dev_get_drvdata(dev); /* the spi->mode bits understood by this driver: */ master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST | SPI_LOOP; master->dev.of_node = dev->of_node; mpc8xxx_spi = spi_master_get_devdata(master); mpc8xxx_spi->dev = dev; mpc8xxx_spi->get_rx = mpc8xxx_spi_rx_buf_u8; mpc8xxx_spi->get_tx = mpc8xxx_spi_tx_buf_u8; mpc8xxx_spi->flags = pdata->flags; mpc8xxx_spi->spibrg = pdata->sysclk; mpc8xxx_spi->irq = irq; mpc8xxx_spi->rx_shift = 0; mpc8xxx_spi->tx_shift = 0; master->bus_num = pdata->bus_num; master->num_chipselect = pdata->max_chipselect; init_completion(&mpc8xxx_spi->done); }

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Mingkai Hu15097.40%133.33%
Jingoo Han31.95%133.33%
Heiner Kallweit10.65%133.33%
Total154100.00%3100.00%

EXPORT_SYMBOL_GPL(mpc8xxx_spi_probe);
int of_mpc8xxx_spi_probe(struct platform_device *ofdev) { struct device *dev = &ofdev->dev; struct device_node *np = ofdev->dev.of_node; struct mpc8xxx_spi_probe_info *pinfo; struct fsl_spi_platform_data *pdata; const void *prop; int ret = -ENOMEM; pinfo = devm_kzalloc(&ofdev->dev, sizeof(*pinfo), GFP_KERNEL); if (!pinfo) return ret; pdata = &pinfo->pdata; dev->platform_data = pdata; /* Allocate bus num dynamically. */ pdata->bus_num = -1; #ifdef CONFIG_FSL_SOC /* SPI controller is either clocked from QE or SoC clock. */ pdata->sysclk = get_brgfreq(); if (pdata->sysclk == -1) { pdata->sysclk = fsl_get_sys_freq(); if (pdata->sysclk == -1) return -ENODEV; } #else ret = of_property_read_u32(np, "clock-frequency", &pdata->sysclk); if (ret) return ret; #endif prop = of_get_property(np, "mode", NULL); if (prop && !strcmp(prop, "cpu-qe")) pdata->flags = SPI_QE_CPU_MODE; else if (prop && !strcmp(prop, "qe")) pdata->flags = SPI_CPM_MODE | SPI_QE; else if (of_device_is_compatible(np, "fsl,cpm2-spi")) pdata->flags = SPI_CPM_MODE | SPI_CPM2; else if (of_device_is_compatible(np, "fsl,cpm1-spi")) pdata->flags = SPI_CPM_MODE | SPI_CPM1; return 0; }

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PersonTokensPropCommitsCommitProp
Mingkai Hu21885.49%125.00%
Andreas Larsson259.80%125.00%
Axel Lin114.31%125.00%
Zhao Qiang10.39%125.00%
Total255100.00%4100.00%

EXPORT_SYMBOL_GPL(of_mpc8xxx_spi_probe); MODULE_LICENSE("GPL");

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PersonTokensPropCommitsCommitProp
Mingkai Hu50886.10%110.00%
Esben Haabendal305.08%110.00%
Andreas Larsson305.08%110.00%
Axel Lin111.86%110.00%
Xiubo Li40.68%110.00%
Jingoo Han30.51%110.00%
Grant C. Likely20.34%220.00%
Zhao Qiang10.17%110.00%
Heiner Kallweit10.17%110.00%
Total590100.00%10100.00%
Directory: drivers/spi
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