summaryrefslogtreecommitdiff
path: root/drivers/spi/spi_fsl_lib.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/spi/spi_fsl_lib.c')
-rw-r--r--drivers/spi/spi_fsl_lib.c236
1 files changed, 0 insertions, 236 deletions
diff --git a/drivers/spi/spi_fsl_lib.c b/drivers/spi/spi_fsl_lib.c
deleted file mode 100644
index ff59f42ae990..000000000000
--- a/drivers/spi/spi_fsl_lib.c
+++ /dev/null
@@ -1,236 +0,0 @@
-/*
- * 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/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/fsl_devices.h>
-#include <linux/dma-mapping.h>
-#include <linux/mm.h>
-#include <linux/of_platform.h>
-#include <linux/of_spi.h>
-#include <sysdev/fsl_soc.h>
-
-#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; \
-}
-
-#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; \
-}
-
-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);
-}
-
-void mpc8xxx_spi_work(struct work_struct *work)
-{
- struct mpc8xxx_spi *mpc8xxx_spi = container_of(work, struct mpc8xxx_spi,
- work);
-
- spin_lock_irq(&mpc8xxx_spi->lock);
- while (!list_empty(&mpc8xxx_spi->queue)) {
- struct spi_message *m = container_of(mpc8xxx_spi->queue.next,
- struct spi_message, queue);
-
- list_del_init(&m->queue);
- spin_unlock_irq(&mpc8xxx_spi->lock);
-
- if (mpc8xxx_spi->spi_do_one_msg)
- mpc8xxx_spi->spi_do_one_msg(m);
-
- spin_lock_irq(&mpc8xxx_spi->lock);
- }
- spin_unlock_irq(&mpc8xxx_spi->lock);
-}
-
-int mpc8xxx_spi_transfer(struct spi_device *spi,
- struct spi_message *m)
-{
- struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(spi->master);
- unsigned long flags;
-
- m->actual_length = 0;
- m->status = -EINPROGRESS;
-
- spin_lock_irqsave(&mpc8xxx_spi->lock, flags);
- list_add_tail(&m->queue, &mpc8xxx_spi->queue);
- queue_work(mpc8xxx_spi->workqueue, &mpc8xxx_spi->work);
- spin_unlock_irqrestore(&mpc8xxx_spi->lock, flags);
-
- return 0;
-}
-
-void mpc8xxx_spi_cleanup(struct spi_device *spi)
-{
- kfree(spi->controller_state);
-}
-
-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";
-}
-
-int mpc8xxx_spi_probe(struct device *dev, struct resource *mem,
- unsigned int irq)
-{
- struct fsl_spi_platform_data *pdata = dev->platform_data;
- struct spi_master *master;
- struct mpc8xxx_spi *mpc8xxx_spi;
- int ret = 0;
-
- 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->transfer = mpc8xxx_spi_transfer;
- master->cleanup = mpc8xxx_spi_cleanup;
- 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;
-
- init_completion(&mpc8xxx_spi->done);
-
- master->bus_num = pdata->bus_num;
- master->num_chipselect = pdata->max_chipselect;
-
- spin_lock_init(&mpc8xxx_spi->lock);
- init_completion(&mpc8xxx_spi->done);
- INIT_WORK(&mpc8xxx_spi->work, mpc8xxx_spi_work);
- INIT_LIST_HEAD(&mpc8xxx_spi->queue);
-
- mpc8xxx_spi->workqueue = create_singlethread_workqueue(
- dev_name(master->dev.parent));
- if (mpc8xxx_spi->workqueue == NULL) {
- ret = -EBUSY;
- goto err;
- }
-
- return 0;
-
-err:
- return ret;
-}
-
-int __devexit mpc8xxx_spi_remove(struct device *dev)
-{
- struct mpc8xxx_spi *mpc8xxx_spi;
- struct spi_master *master;
-
- master = dev_get_drvdata(dev);
- mpc8xxx_spi = spi_master_get_devdata(master);
-
- flush_workqueue(mpc8xxx_spi->workqueue);
- destroy_workqueue(mpc8xxx_spi->workqueue);
- spi_unregister_master(master);
-
- free_irq(mpc8xxx_spi->irq, mpc8xxx_spi);
-
- if (mpc8xxx_spi->spi_remove)
- mpc8xxx_spi->spi_remove(mpc8xxx_spi);
-
- return 0;
-}
-
-int __devinit 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 = kzalloc(sizeof(*pinfo), GFP_KERNEL);
- if (!pinfo)
- return -ENOMEM;
-
- pdata = &pinfo->pdata;
- dev->platform_data = pdata;
-
- /* Allocate bus num dynamically. */
- pdata->bus_num = -1;
-
- /* 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) {
- ret = -ENODEV;
- goto err;
- }
- }
-
- 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;
-
-err:
- kfree(pinfo);
- return ret;
-}
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-24 00:05:00 +0000