1 // SPDX-License-Identifier: GPL-2.0+
3 // Copyright (c) 2013-2014 Freescale Semiconductor, Inc
10 #include <linux/platform_data/dma-mcf-edma.h>
12 #include "fsl-edma-common.h"
20 	struct edma_regs *regs = &mcf_edma->regs;  in mcf_edma_tx_handler()
24 	intmap = ioread32(regs->inth);  in mcf_edma_tx_handler()
26 	intmap |= ioread32(regs->intl);  in mcf_edma_tx_handler()
30 	for (ch = 0; ch < mcf_edma->n_chans; ch++) {  in mcf_edma_tx_handler()
32 			iowrite8(EDMA_MASK_CH(ch), regs->cint);  in mcf_edma_tx_handler()
33 			fsl_edma_tx_chan_handler(&mcf_edma->chans[ch]);  in mcf_edma_tx_handler()
43 	struct edma_regs *regs = &mcf_edma->regs;  in mcf_edma_err_handler()
46 	err = ioread32(regs->errl);  in mcf_edma_err_handler()
52 			fsl_edma_disable_request(&mcf_edma->chans[ch]);  in mcf_edma_err_handler()
53 			iowrite8(EDMA_CERR_CERR(ch), regs->cerr);  in mcf_edma_err_handler()
54 			fsl_edma_err_chan_handler(&mcf_edma->chans[ch]);  in mcf_edma_err_handler()
58 	err = ioread32(regs->errh);  in mcf_edma_err_handler()
63 		if (err & (BIT(ch - (EDMA_CHANNELS / 2)))) {  in mcf_edma_err_handler()
64 			fsl_edma_disable_request(&mcf_edma->chans[ch]);  in mcf_edma_err_handler()
65 			iowrite8(EDMA_CERR_CERR(ch), regs->cerr);  in mcf_edma_err_handler()
66 			mcf_edma->chans[ch].status = DMA_ERROR;  in mcf_edma_err_handler()
80 				IORESOURCE_IRQ, "edma-tx-00-15");  in mcf_edma_irq_init()
82 		return -1;  in mcf_edma_irq_init()
84 	for (ret = 0, i = res->start; i <= res->end; ++i)  in mcf_edma_irq_init()
85 		ret |= request_irq(i, mcf_edma_tx_handler, 0, "eDMA", mcf_edma);  in mcf_edma_irq_init()
90 			IORESOURCE_IRQ, "edma-tx-16-55");  in mcf_edma_irq_init()
92 		return -1;  in mcf_edma_irq_init()
94 	for (ret = 0, i = res->start; i <= res->end; ++i)  in mcf_edma_irq_init()
95 		ret |= request_irq(i, mcf_edma_tx_handler, 0, "eDMA", mcf_edma);  in mcf_edma_irq_init()
99 	ret = platform_get_irq_byname(pdev, "edma-tx-56-63");  in mcf_edma_irq_init()
100 	if (ret != -ENXIO) {  in mcf_edma_irq_init()
102 				  0, "eDMA", mcf_edma);  in mcf_edma_irq_init()
107 	ret = platform_get_irq_byname(pdev, "edma-err");  in mcf_edma_irq_init()
108 	if (ret != -ENXIO) {  in mcf_edma_irq_init()
110 				  0, "eDMA", mcf_edma);  in mcf_edma_irq_init()
125 			IORESOURCE_IRQ, "edma-tx-00-15");  in mcf_edma_irq_free()
127 		for (irq = res->start; irq <= res->end; irq++)  in mcf_edma_irq_free()
132 			IORESOURCE_IRQ, "edma-tx-16-55");  in mcf_edma_irq_free()
134 		for (irq = res->start; irq <= res->end; irq++)  in mcf_edma_irq_free()
138 	irq = platform_get_irq_byname(pdev, "edma-tx-56-63");  in mcf_edma_irq_free()
139 	if (irq != -ENXIO)  in mcf_edma_irq_free()
142 	irq = platform_get_irq_byname(pdev, "edma-err");  in mcf_edma_irq_free()
143 	if (irq != -ENXIO)  in mcf_edma_irq_free()
159 	pdata = dev_get_platdata(&pdev->dev);  in mcf_edma_probe()
161 		dev_err(&pdev->dev, "no platform data supplied\n");  in mcf_edma_probe()
162 		return -EINVAL;  in mcf_edma_probe()
165 	if (!pdata->dma_channels) {  in mcf_edma_probe()
166 		dev_info(&pdev->dev, "setting default channel number to 64");  in mcf_edma_probe()
169 		chans = pdata->dma_channels;  in mcf_edma_probe()
172 	mcf_edma = devm_kzalloc(&pdev->dev, struct_size(mcf_edma, chans, chans),  in mcf_edma_probe()
175 		return -ENOMEM;  in mcf_edma_probe()
177 	mcf_edma->n_chans = chans;  in mcf_edma_probe()
179 	/* Set up drvdata for ColdFire edma */  in mcf_edma_probe()
180 	mcf_edma->drvdata = &mcf_data;  in mcf_edma_probe()
181 	mcf_edma->big_endian = 1;  in mcf_edma_probe()
183 	mutex_init(&mcf_edma->fsl_edma_mutex);  in mcf_edma_probe()
185 	mcf_edma->membase = devm_platform_ioremap_resource(pdev, 0);  in mcf_edma_probe()
186 	if (IS_ERR(mcf_edma->membase))  in mcf_edma_probe()
187 		return PTR_ERR(mcf_edma->membase);  in mcf_edma_probe()
190 	regs = &mcf_edma->regs;  in mcf_edma_probe()
192 	INIT_LIST_HEAD(&mcf_edma->dma_dev.channels);  in mcf_edma_probe()
193 	for (i = 0; i < mcf_edma->n_chans; i++) {  in mcf_edma_probe()
194 		struct fsl_edma_chan *mcf_chan = &mcf_edma->chans[i];  in mcf_edma_probe()
196 		mcf_chan->edma = mcf_edma;  in mcf_edma_probe()
197 		mcf_chan->srcid = i;  in mcf_edma_probe()
198 		mcf_chan->dma_dir = DMA_NONE;  in mcf_edma_probe()
199 		mcf_chan->vchan.desc_free = fsl_edma_free_desc;  in mcf_edma_probe()
200 		vchan_init(&mcf_chan->vchan, &mcf_edma->dma_dev);  in mcf_edma_probe()
201 		mcf_chan->tcd = mcf_edma->membase + EDMA_TCD  in mcf_edma_probe()
206 	iowrite32(~0, regs->inth);  in mcf_edma_probe()
207 	iowrite32(~0, regs->intl);  in mcf_edma_probe()
209 	ret = mcf_edma->drvdata->setup_irq(pdev, mcf_edma);  in mcf_edma_probe()
213 	dma_cap_set(DMA_PRIVATE, mcf_edma->dma_dev.cap_mask);  in mcf_edma_probe()
214 	dma_cap_set(DMA_SLAVE, mcf_edma->dma_dev.cap_mask);  in mcf_edma_probe()
215 	dma_cap_set(DMA_CYCLIC, mcf_edma->dma_dev.cap_mask);  in mcf_edma_probe()
217 	mcf_edma->dma_dev.dev = &pdev->dev;  in mcf_edma_probe()
218 	mcf_edma->dma_dev.device_alloc_chan_resources =  in mcf_edma_probe()
220 	mcf_edma->dma_dev.device_free_chan_resources =  in mcf_edma_probe()
222 	mcf_edma->dma_dev.device_config = fsl_edma_slave_config;  in mcf_edma_probe()
223 	mcf_edma->dma_dev.device_prep_dma_cyclic =  in mcf_edma_probe()
225 	mcf_edma->dma_dev.device_prep_slave_sg = fsl_edma_prep_slave_sg;  in mcf_edma_probe()
226 	mcf_edma->dma_dev.device_tx_status = fsl_edma_tx_status;  in mcf_edma_probe()
227 	mcf_edma->dma_dev.device_pause = fsl_edma_pause;  in mcf_edma_probe()
228 	mcf_edma->dma_dev.device_resume = fsl_edma_resume;  in mcf_edma_probe()
229 	mcf_edma->dma_dev.device_terminate_all = fsl_edma_terminate_all;  in mcf_edma_probe()
230 	mcf_edma->dma_dev.device_issue_pending = fsl_edma_issue_pending;  in mcf_edma_probe()
232 	mcf_edma->dma_dev.src_addr_widths = FSL_EDMA_BUSWIDTHS;  in mcf_edma_probe()
233 	mcf_edma->dma_dev.dst_addr_widths = FSL_EDMA_BUSWIDTHS;  in mcf_edma_probe()
234 	mcf_edma->dma_dev.directions =  in mcf_edma_probe()
237 	mcf_edma->dma_dev.filter.fn = mcf_edma_filter_fn;  in mcf_edma_probe()
238 	mcf_edma->dma_dev.filter.map = pdata->slave_map;  in mcf_edma_probe()
239 	mcf_edma->dma_dev.filter.mapcnt = pdata->slavecnt;  in mcf_edma_probe()
243 	ret = dma_async_device_register(&mcf_edma->dma_dev);  in mcf_edma_probe()
245 		dev_err(&pdev->dev,  in mcf_edma_probe()
246 			"Can't register Freescale eDMA engine. (%d)\n", ret);  in mcf_edma_probe()
251 	iowrite32(EDMA_CR_ERGA | EDMA_CR_ERCA, regs->cr);  in mcf_edma_probe()
261 	fsl_edma_cleanup_vchan(&mcf_edma->dma_dev);  in mcf_edma_remove()
262 	dma_async_device_unregister(&mcf_edma->dma_dev);  in mcf_edma_remove()
267 		.name	= "mcf-edma",
275 	if (chan->device->dev->driver == &mcf_edma_driver.driver) {  in mcf_edma_filter_fn()
278 		return (mcf_chan->srcid == (uintptr_t)param);  in mcf_edma_filter_fn()
297 MODULE_ALIAS("platform:mcf-edma");
298 MODULE_DESCRIPTION("Freescale eDMA engine driver, ColdFire family");