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Diffstat (limited to 'drivers/dma/mcf-edma.c')
-rw-r--r--drivers/dma/mcf-edma.c330
1 files changed, 0 insertions, 330 deletions
diff --git a/drivers/dma/mcf-edma.c b/drivers/dma/mcf-edma.c
deleted file mode 100644
index e12b754e6398..000000000000
--- a/drivers/dma/mcf-edma.c
+++ /dev/null
@@ -1,330 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-//
-// Copyright (c) 2013-2014 Freescale Semiconductor, Inc
-// Copyright (c) 2017 Sysam, Angelo Dureghello <angelo@sysam.it>
-
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/dmaengine.h>
-#include <linux/platform_device.h>
-#include <linux/platform_data/dma-mcf-edma.h>
-
-#include "fsl-edma-common.h"
-
-#define EDMA_CHANNELS 64
-#define EDMA_MASK_CH(x) ((x) & GENMASK(5, 0))
-
-static irqreturn_t mcf_edma_tx_handler(int irq, void *dev_id)
-{
- struct fsl_edma_engine *mcf_edma = dev_id;
- struct edma_regs *regs = &mcf_edma->regs;
- unsigned int ch;
- struct fsl_edma_chan *mcf_chan;
- u64 intmap;
-
- intmap = ioread32(regs->inth);
- intmap <<= 32;
- intmap |= ioread32(regs->intl);
- if (!intmap)
- return IRQ_NONE;
-
- for (ch = 0; ch < mcf_edma->n_chans; ch++) {
- if (intmap & BIT(ch)) {
- iowrite8(EDMA_MASK_CH(ch), regs->cint);
-
- mcf_chan = &mcf_edma->chans[ch];
-
- spin_lock(&mcf_chan->vchan.lock);
-
- if (!mcf_chan->edesc) {
- /* terminate_all called before */
- spin_unlock(&mcf_chan->vchan.lock);
- continue;
- }
-
- if (!mcf_chan->edesc->iscyclic) {
- list_del(&mcf_chan->edesc->vdesc.node);
- vchan_cookie_complete(&mcf_chan->edesc->vdesc);
- mcf_chan->edesc = NULL;
- mcf_chan->status = DMA_COMPLETE;
- mcf_chan->idle = true;
- } else {
- vchan_cyclic_callback(&mcf_chan->edesc->vdesc);
- }
-
- if (!mcf_chan->edesc)
- fsl_edma_xfer_desc(mcf_chan);
-
- spin_unlock(&mcf_chan->vchan.lock);
- }
- }
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t mcf_edma_err_handler(int irq, void *dev_id)
-{
- struct fsl_edma_engine *mcf_edma = dev_id;
- struct edma_regs *regs = &mcf_edma->regs;
- unsigned int err, ch;
-
- err = ioread32(regs->errl);
- if (!err)
- return IRQ_NONE;
-
- for (ch = 0; ch < (EDMA_CHANNELS / 2); ch++) {
- if (err & BIT(ch)) {
- fsl_edma_disable_request(&mcf_edma->chans[ch]);
- iowrite8(EDMA_CERR_CERR(ch), regs->cerr);
- mcf_edma->chans[ch].status = DMA_ERROR;
- mcf_edma->chans[ch].idle = true;
- }
- }
-
- err = ioread32(regs->errh);
- if (!err)
- return IRQ_NONE;
-
- for (ch = (EDMA_CHANNELS / 2); ch < EDMA_CHANNELS; ch++) {
- if (err & (BIT(ch - (EDMA_CHANNELS / 2)))) {
- fsl_edma_disable_request(&mcf_edma->chans[ch]);
- iowrite8(EDMA_CERR_CERR(ch), regs->cerr);
- mcf_edma->chans[ch].status = DMA_ERROR;
- mcf_edma->chans[ch].idle = true;
- }
- }
-
- return IRQ_HANDLED;
-}
-
-static int mcf_edma_irq_init(struct platform_device *pdev,
- struct fsl_edma_engine *mcf_edma)
-{
- int ret = 0, i;
- struct resource *res;
-
- res = platform_get_resource_byname(pdev,
- IORESOURCE_IRQ, "edma-tx-00-15");
- if (!res)
- return -1;
-
- for (ret = 0, i = res->start; i <= res->end; ++i)
- ret |= request_irq(i, mcf_edma_tx_handler, 0, "eDMA", mcf_edma);
- if (ret)
- return ret;
-
- res = platform_get_resource_byname(pdev,
- IORESOURCE_IRQ, "edma-tx-16-55");
- if (!res)
- return -1;
-
- for (ret = 0, i = res->start; i <= res->end; ++i)
- ret |= request_irq(i, mcf_edma_tx_handler, 0, "eDMA", mcf_edma);
- if (ret)
- return ret;
-
- ret = platform_get_irq_byname(pdev, "edma-tx-56-63");
- if (ret != -ENXIO) {
- ret = request_irq(ret, mcf_edma_tx_handler,
- 0, "eDMA", mcf_edma);
- if (ret)
- return ret;
- }
-
- ret = platform_get_irq_byname(pdev, "edma-err");
- if (ret != -ENXIO) {
- ret = request_irq(ret, mcf_edma_err_handler,
- 0, "eDMA", mcf_edma);
- if (ret)
- return ret;
- }
-
- return 0;
-}
-
-static void mcf_edma_irq_free(struct platform_device *pdev,
- struct fsl_edma_engine *mcf_edma)
-{
- int irq;
- struct resource *res;
-
- res = platform_get_resource_byname(pdev,
- IORESOURCE_IRQ, "edma-tx-00-15");
- if (res) {
- for (irq = res->start; irq <= res->end; irq++)
- free_irq(irq, mcf_edma);
- }
-
- res = platform_get_resource_byname(pdev,
- IORESOURCE_IRQ, "edma-tx-16-55");
- if (res) {
- for (irq = res->start; irq <= res->end; irq++)
- free_irq(irq, mcf_edma);
- }
-
- irq = platform_get_irq_byname(pdev, "edma-tx-56-63");
- if (irq != -ENXIO)
- free_irq(irq, mcf_edma);
-
- irq = platform_get_irq_byname(pdev, "edma-err");
- if (irq != -ENXIO)
- free_irq(irq, mcf_edma);
-}
-
-static struct fsl_edma_drvdata mcf_data = {
- .version = v2,
- .setup_irq = mcf_edma_irq_init,
-};
-
-static int mcf_edma_probe(struct platform_device *pdev)
-{
- struct mcf_edma_platform_data *pdata;
- struct fsl_edma_engine *mcf_edma;
- struct fsl_edma_chan *mcf_chan;
- struct edma_regs *regs;
- struct resource *res;
- int ret, i, len, chans;
-
- pdata = dev_get_platdata(&pdev->dev);
- if (!pdata) {
- dev_err(&pdev->dev, "no platform data supplied\n");
- return -EINVAL;
- }
-
- chans = pdata->dma_channels;
- len = sizeof(*mcf_edma) + sizeof(*mcf_chan) * chans;
- mcf_edma = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
- if (!mcf_edma)
- return -ENOMEM;
-
- mcf_edma->n_chans = chans;
-
- /* Set up drvdata for ColdFire edma */
- mcf_edma->drvdata = &mcf_data;
- mcf_edma->big_endian = 1;
-
- if (!mcf_edma->n_chans) {
- dev_info(&pdev->dev, "setting default channel number to 64");
- mcf_edma->n_chans = 64;
- }
-
- mutex_init(&mcf_edma->fsl_edma_mutex);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-
- mcf_edma->membase = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(mcf_edma->membase))
- return PTR_ERR(mcf_edma->membase);
-
- fsl_edma_setup_regs(mcf_edma);
- regs = &mcf_edma->regs;
-
- INIT_LIST_HEAD(&mcf_edma->dma_dev.channels);
- for (i = 0; i < mcf_edma->n_chans; i++) {
- struct fsl_edma_chan *mcf_chan = &mcf_edma->chans[i];
-
- mcf_chan->edma = mcf_edma;
- mcf_chan->slave_id = i;
- mcf_chan->idle = true;
- mcf_chan->dma_dir = DMA_NONE;
- mcf_chan->vchan.desc_free = fsl_edma_free_desc;
- vchan_init(&mcf_chan->vchan, &mcf_edma->dma_dev);
- iowrite32(0x0, &regs->tcd[i].csr);
- }
-
- iowrite32(~0, regs->inth);
- iowrite32(~0, regs->intl);
-
- ret = mcf_edma->drvdata->setup_irq(pdev, mcf_edma);
- if (ret)
- return ret;
-
- dma_cap_set(DMA_PRIVATE, mcf_edma->dma_dev.cap_mask);
- dma_cap_set(DMA_SLAVE, mcf_edma->dma_dev.cap_mask);
- dma_cap_set(DMA_CYCLIC, mcf_edma->dma_dev.cap_mask);
-
- mcf_edma->dma_dev.dev = &pdev->dev;
- mcf_edma->dma_dev.device_alloc_chan_resources =
- fsl_edma_alloc_chan_resources;
- mcf_edma->dma_dev.device_free_chan_resources =
- fsl_edma_free_chan_resources;
- mcf_edma->dma_dev.device_config = fsl_edma_slave_config;
- mcf_edma->dma_dev.device_prep_dma_cyclic =
- fsl_edma_prep_dma_cyclic;
- mcf_edma->dma_dev.device_prep_slave_sg = fsl_edma_prep_slave_sg;
- mcf_edma->dma_dev.device_tx_status = fsl_edma_tx_status;
- mcf_edma->dma_dev.device_pause = fsl_edma_pause;
- mcf_edma->dma_dev.device_resume = fsl_edma_resume;
- mcf_edma->dma_dev.device_terminate_all = fsl_edma_terminate_all;
- mcf_edma->dma_dev.device_issue_pending = fsl_edma_issue_pending;
-
- mcf_edma->dma_dev.src_addr_widths = FSL_EDMA_BUSWIDTHS;
- mcf_edma->dma_dev.dst_addr_widths = FSL_EDMA_BUSWIDTHS;
- mcf_edma->dma_dev.directions =
- BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
-
- mcf_edma->dma_dev.filter.fn = mcf_edma_filter_fn;
- mcf_edma->dma_dev.filter.map = pdata->slave_map;
- mcf_edma->dma_dev.filter.mapcnt = pdata->slavecnt;
-
- platform_set_drvdata(pdev, mcf_edma);
-
- ret = dma_async_device_register(&mcf_edma->dma_dev);
- if (ret) {
- dev_err(&pdev->dev,
- "Can't register Freescale eDMA engine. (%d)\n", ret);
- return ret;
- }
-
- /* Enable round robin arbitration */
- iowrite32(EDMA_CR_ERGA | EDMA_CR_ERCA, regs->cr);
-
- return 0;
-}
-
-static int mcf_edma_remove(struct platform_device *pdev)
-{
- struct fsl_edma_engine *mcf_edma = platform_get_drvdata(pdev);
-
- mcf_edma_irq_free(pdev, mcf_edma);
- fsl_edma_cleanup_vchan(&mcf_edma->dma_dev);
- dma_async_device_unregister(&mcf_edma->dma_dev);
-
- return 0;
-}
-
-static struct platform_driver mcf_edma_driver = {
- .driver = {
- .name = "mcf-edma",
- },
- .probe = mcf_edma_probe,
- .remove = mcf_edma_remove,
-};
-
-bool mcf_edma_filter_fn(struct dma_chan *chan, void *param)
-{
- if (chan->device->dev->driver == &mcf_edma_driver.driver) {
- struct fsl_edma_chan *mcf_chan = to_fsl_edma_chan(chan);
-
- return (mcf_chan->slave_id == (uintptr_t)param);
- }
-
- return false;
-}
-EXPORT_SYMBOL(mcf_edma_filter_fn);
-
-static int __init mcf_edma_init(void)
-{
- return platform_driver_register(&mcf_edma_driver);
-}
-subsys_initcall(mcf_edma_init);
-
-static void __exit mcf_edma_exit(void)
-{
- platform_driver_unregister(&mcf_edma_driver);
-}
-module_exit(mcf_edma_exit);
-
-MODULE_ALIAS("platform:mcf-edma");
-MODULE_DESCRIPTION("Freescale eDMA engine driver, ColdFire family");
-MODULE_LICENSE("GPL v2");
generated by cgit (git 2.34.1) at 2025-12-25 08:48:44 +0000