Lines Matching +full:fu540 +full:- +full:c000
1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * SiFive FU540 Platform DMA driver
7 * - drivers/dma/fsl-edma.c
8 * - drivers/dma/dw-edma/
9 * - drivers/dma/pxa-dma.c
12 * - Chapter 12 "Platform DMA Engine (PDMA)" of
13 * SiFive FU540-C000 v1.0
14 * https://static.dev.sifive.com/FU540-C000-v1.0.pdf
21 #include <linux/dma-mapping.h>
25 #include "sf-pdma.h"
57 spin_lock_irqsave(&chan->lock, flags); in sf_pdma_alloc_desc()
59 if (chan->desc && !chan->desc->in_use) { in sf_pdma_alloc_desc()
60 spin_unlock_irqrestore(&chan->lock, flags); in sf_pdma_alloc_desc()
61 return chan->desc; in sf_pdma_alloc_desc()
64 spin_unlock_irqrestore(&chan->lock, flags); in sf_pdma_alloc_desc()
70 desc->chan = chan; in sf_pdma_alloc_desc()
78 desc->xfer_type = PDMA_FULL_SPEED; in sf_pdma_fill_desc()
79 desc->xfer_size = size; in sf_pdma_fill_desc()
80 desc->dst_addr = dst; in sf_pdma_fill_desc()
81 desc->src_addr = src; in sf_pdma_fill_desc()
86 struct pdma_regs *regs = &chan->regs; in sf_pdma_disclaim_chan()
88 writel(PDMA_CLEAR_CTRL, regs->ctrl); in sf_pdma_disclaim_chan()
100 dev_err(chan->pdma->dma_dev.dev, in sf_pdma_prep_dma_memcpy()
109 desc->in_use = true; in sf_pdma_prep_dma_memcpy()
110 desc->dirn = DMA_MEM_TO_MEM; in sf_pdma_prep_dma_memcpy()
111 desc->async_tx = vchan_tx_prep(&chan->vchan, &desc->vdesc, flags); in sf_pdma_prep_dma_memcpy()
113 spin_lock_irqsave(&chan->vchan.lock, iflags); in sf_pdma_prep_dma_memcpy()
114 chan->desc = desc; in sf_pdma_prep_dma_memcpy()
116 spin_unlock_irqrestore(&chan->vchan.lock, iflags); in sf_pdma_prep_dma_memcpy()
118 return desc->async_tx; in sf_pdma_prep_dma_memcpy()
126 memcpy(&chan->cfg, cfg, sizeof(*cfg)); in sf_pdma_slave_config()
134 struct pdma_regs *regs = &chan->regs; in sf_pdma_alloc_chan_resources()
137 writel(PDMA_CLAIM_MASK, regs->ctrl); in sf_pdma_alloc_chan_resources()
144 struct pdma_regs *regs = &chan->regs; in sf_pdma_disable_request()
146 writel(readl(regs->ctrl) & ~PDMA_RUN_MASK, regs->ctrl); in sf_pdma_disable_request()
155 spin_lock_irqsave(&chan->vchan.lock, flags); in sf_pdma_free_chan_resources()
157 kfree(chan->desc); in sf_pdma_free_chan_resources()
158 chan->desc = NULL; in sf_pdma_free_chan_resources()
159 vchan_get_all_descriptors(&chan->vchan, &head); in sf_pdma_free_chan_resources()
161 spin_unlock_irqrestore(&chan->vchan.lock, flags); in sf_pdma_free_chan_resources()
162 vchan_dma_desc_free_list(&chan->vchan, &head); in sf_pdma_free_chan_resources()
169 struct pdma_regs *regs = &chan->regs; in sf_pdma_desc_residue()
175 spin_lock_irqsave(&chan->vchan.lock, flags); in sf_pdma_desc_residue()
177 tx = &chan->desc->vdesc.tx; in sf_pdma_desc_residue()
178 if (cookie == tx->chan->completed_cookie) in sf_pdma_desc_residue()
181 if (cookie == tx->cookie) { in sf_pdma_desc_residue()
182 residue = readq(regs->residue); in sf_pdma_desc_residue()
184 vd = vchan_find_desc(&chan->vchan, cookie); in sf_pdma_desc_residue()
189 residue = desc->xfer_size; in sf_pdma_desc_residue()
193 spin_unlock_irqrestore(&chan->vchan.lock, flags); in sf_pdma_desc_residue()
219 spin_lock_irqsave(&chan->vchan.lock, flags); in sf_pdma_terminate_all()
221 kfree(chan->desc); in sf_pdma_terminate_all()
222 chan->desc = NULL; in sf_pdma_terminate_all()
223 chan->xfer_err = false; in sf_pdma_terminate_all()
224 vchan_get_all_descriptors(&chan->vchan, &head); in sf_pdma_terminate_all()
225 spin_unlock_irqrestore(&chan->vchan.lock, flags); in sf_pdma_terminate_all()
226 vchan_dma_desc_free_list(&chan->vchan, &head); in sf_pdma_terminate_all()
233 struct pdma_regs *regs = &chan->regs; in sf_pdma_enable_request()
241 writel(v, regs->ctrl); in sf_pdma_enable_request()
246 struct sf_pdma_desc *desc = chan->desc; in sf_pdma_xfer_desc()
247 struct pdma_regs *regs = &chan->regs; in sf_pdma_xfer_desc()
250 dev_err(chan->pdma->dma_dev.dev, "NULL desc.\n"); in sf_pdma_xfer_desc()
254 writel(desc->xfer_type, regs->xfer_type); in sf_pdma_xfer_desc()
255 writeq(desc->xfer_size, regs->xfer_size); in sf_pdma_xfer_desc()
256 writeq(desc->dst_addr, regs->dst_addr); in sf_pdma_xfer_desc()
257 writeq(desc->src_addr, regs->src_addr); in sf_pdma_xfer_desc()
259 chan->desc = desc; in sf_pdma_xfer_desc()
260 chan->status = DMA_IN_PROGRESS; in sf_pdma_xfer_desc()
269 spin_lock_irqsave(&chan->vchan.lock, flags); in sf_pdma_issue_pending()
271 if (vchan_issue_pending(&chan->vchan) && chan->desc) in sf_pdma_issue_pending()
274 spin_unlock_irqrestore(&chan->vchan.lock, flags); in sf_pdma_issue_pending()
282 desc->in_use = false; in sf_pdma_free_desc()
290 spin_lock_irqsave(&chan->lock, flags); in sf_pdma_donebh_tasklet()
291 if (chan->xfer_err) { in sf_pdma_donebh_tasklet()
292 chan->retries = MAX_RETRY; in sf_pdma_donebh_tasklet()
293 chan->status = DMA_COMPLETE; in sf_pdma_donebh_tasklet()
294 chan->xfer_err = false; in sf_pdma_donebh_tasklet()
296 spin_unlock_irqrestore(&chan->lock, flags); in sf_pdma_donebh_tasklet()
298 spin_lock_irqsave(&chan->vchan.lock, flags); in sf_pdma_donebh_tasklet()
299 list_del(&chan->desc->vdesc.node); in sf_pdma_donebh_tasklet()
300 vchan_cookie_complete(&chan->desc->vdesc); in sf_pdma_donebh_tasklet()
301 spin_unlock_irqrestore(&chan->vchan.lock, flags); in sf_pdma_donebh_tasklet()
307 struct sf_pdma_desc *desc = chan->desc; in sf_pdma_errbh_tasklet()
310 spin_lock_irqsave(&chan->lock, flags); in sf_pdma_errbh_tasklet()
311 if (chan->retries <= 0) { in sf_pdma_errbh_tasklet()
313 spin_unlock_irqrestore(&chan->lock, flags); in sf_pdma_errbh_tasklet()
314 dmaengine_desc_get_callback_invoke(desc->async_tx, NULL); in sf_pdma_errbh_tasklet()
317 chan->retries--; in sf_pdma_errbh_tasklet()
318 chan->xfer_err = true; in sf_pdma_errbh_tasklet()
319 chan->status = DMA_ERROR; in sf_pdma_errbh_tasklet()
322 spin_unlock_irqrestore(&chan->lock, flags); in sf_pdma_errbh_tasklet()
329 struct pdma_regs *regs = &chan->regs; in sf_pdma_done_isr()
332 spin_lock(&chan->vchan.lock); in sf_pdma_done_isr()
333 writel((readl(regs->ctrl)) & ~PDMA_DONE_STATUS_MASK, regs->ctrl); in sf_pdma_done_isr()
334 residue = readq(regs->residue); in sf_pdma_done_isr()
337 tasklet_hi_schedule(&chan->done_tasklet); in sf_pdma_done_isr()
340 struct sf_pdma_desc *desc = chan->desc; in sf_pdma_done_isr()
342 desc->src_addr += desc->xfer_size - residue; in sf_pdma_done_isr()
343 desc->dst_addr += desc->xfer_size - residue; in sf_pdma_done_isr()
344 desc->xfer_size = residue; in sf_pdma_done_isr()
349 spin_unlock(&chan->vchan.lock); in sf_pdma_done_isr()
357 struct pdma_regs *regs = &chan->regs; in sf_pdma_err_isr()
359 spin_lock(&chan->lock); in sf_pdma_err_isr()
360 writel((readl(regs->ctrl)) & ~PDMA_ERR_STATUS_MASK, regs->ctrl); in sf_pdma_err_isr()
361 spin_unlock(&chan->lock); in sf_pdma_err_isr()
363 tasklet_schedule(&chan->err_tasklet); in sf_pdma_err_isr()
369 * sf_pdma_irq_init() - Init PDMA IRQ Handlers
374 * make sure the pointer passed in are non-NULL. This function should be called
380 * * 0 - OK to init all IRQ handlers
381 * * -EINVAL - Fail to request IRQ
388 for (i = 0; i < pdma->n_chans; i++) { in sf_pdma_irq_init()
389 chan = &pdma->chans[i]; in sf_pdma_irq_init()
393 dev_err(&pdev->dev, "ch(%d) Can't get done irq.\n", i); in sf_pdma_irq_init()
394 return -EINVAL; in sf_pdma_irq_init()
397 r = devm_request_irq(&pdev->dev, irq, sf_pdma_done_isr, 0, in sf_pdma_irq_init()
398 dev_name(&pdev->dev), (void *)chan); in sf_pdma_irq_init()
400 dev_err(&pdev->dev, "Fail to attach done ISR: %d\n", r); in sf_pdma_irq_init()
401 return -EINVAL; in sf_pdma_irq_init()
404 chan->txirq = irq; in sf_pdma_irq_init()
408 dev_err(&pdev->dev, "ch(%d) Can't get err irq.\n", i); in sf_pdma_irq_init()
409 return -EINVAL; in sf_pdma_irq_init()
412 r = devm_request_irq(&pdev->dev, irq, sf_pdma_err_isr, 0, in sf_pdma_irq_init()
413 dev_name(&pdev->dev), (void *)chan); in sf_pdma_irq_init()
415 dev_err(&pdev->dev, "Fail to attach err ISR: %d\n", r); in sf_pdma_irq_init()
416 return -EINVAL; in sf_pdma_irq_init()
419 chan->errirq = irq; in sf_pdma_irq_init()
426 * sf_pdma_setup_chans() - Init settings of each channel
430 * the pointer passed in are non-NULL. This function should be called only
442 INIT_LIST_HEAD(&pdma->dma_dev.channels); in sf_pdma_setup_chans()
444 for (i = 0; i < pdma->n_chans; i++) { in sf_pdma_setup_chans()
445 chan = &pdma->chans[i]; in sf_pdma_setup_chans()
447 chan->regs.ctrl = in sf_pdma_setup_chans()
449 chan->regs.xfer_type = in sf_pdma_setup_chans()
451 chan->regs.xfer_size = in sf_pdma_setup_chans()
453 chan->regs.dst_addr = in sf_pdma_setup_chans()
455 chan->regs.src_addr = in sf_pdma_setup_chans()
457 chan->regs.act_type = in sf_pdma_setup_chans()
459 chan->regs.residue = in sf_pdma_setup_chans()
461 chan->regs.cur_dst_addr = in sf_pdma_setup_chans()
463 chan->regs.cur_src_addr = in sf_pdma_setup_chans()
466 chan->pdma = pdma; in sf_pdma_setup_chans()
467 chan->pm_state = RUNNING; in sf_pdma_setup_chans()
468 chan->slave_id = i; in sf_pdma_setup_chans()
469 chan->xfer_err = false; in sf_pdma_setup_chans()
470 spin_lock_init(&chan->lock); in sf_pdma_setup_chans()
472 chan->vchan.desc_free = sf_pdma_free_desc; in sf_pdma_setup_chans()
473 vchan_init(&chan->vchan, &pdma->dma_dev); in sf_pdma_setup_chans()
475 writel(PDMA_CLEAR_CTRL, chan->regs.ctrl); in sf_pdma_setup_chans()
477 tasklet_setup(&chan->done_tasklet, sf_pdma_donebh_tasklet); in sf_pdma_setup_chans()
478 tasklet_setup(&chan->err_tasklet, sf_pdma_errbh_tasklet); in sf_pdma_setup_chans()
497 pdma = devm_kzalloc(&pdev->dev, len, GFP_KERNEL); in sf_pdma_probe()
499 return -ENOMEM; in sf_pdma_probe()
501 pdma->n_chans = chans; in sf_pdma_probe()
504 pdma->membase = devm_ioremap_resource(&pdev->dev, res); in sf_pdma_probe()
505 if (IS_ERR(pdma->membase)) in sf_pdma_probe()
506 return PTR_ERR(pdma->membase); in sf_pdma_probe()
514 pdma->dma_dev.dev = &pdev->dev; in sf_pdma_probe()
517 dma_cap_set(DMA_MEMCPY, pdma->dma_dev.cap_mask); in sf_pdma_probe()
518 pdma->dma_dev.copy_align = 2; in sf_pdma_probe()
519 pdma->dma_dev.src_addr_widths = widths; in sf_pdma_probe()
520 pdma->dma_dev.dst_addr_widths = widths; in sf_pdma_probe()
521 pdma->dma_dev.directions = BIT(DMA_MEM_TO_MEM); in sf_pdma_probe()
522 pdma->dma_dev.residue_granularity = DMA_RESIDUE_GRANULARITY_DESCRIPTOR; in sf_pdma_probe()
523 pdma->dma_dev.descriptor_reuse = true; in sf_pdma_probe()
526 pdma->dma_dev.device_alloc_chan_resources = in sf_pdma_probe()
528 pdma->dma_dev.device_free_chan_resources = in sf_pdma_probe()
530 pdma->dma_dev.device_tx_status = sf_pdma_tx_status; in sf_pdma_probe()
531 pdma->dma_dev.device_prep_dma_memcpy = sf_pdma_prep_dma_memcpy; in sf_pdma_probe()
532 pdma->dma_dev.device_config = sf_pdma_slave_config; in sf_pdma_probe()
533 pdma->dma_dev.device_terminate_all = sf_pdma_terminate_all; in sf_pdma_probe()
534 pdma->dma_dev.device_issue_pending = sf_pdma_issue_pending; in sf_pdma_probe()
538 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); in sf_pdma_probe()
540 dev_warn(&pdev->dev, in sf_pdma_probe()
543 ret = dma_async_device_register(&pdma->dma_dev); in sf_pdma_probe()
545 dev_err(&pdev->dev, in sf_pdma_probe()
560 ch = &pdma->chans[i]; in sf_pdma_remove()
562 devm_free_irq(&pdev->dev, ch->txirq, ch); in sf_pdma_remove()
563 devm_free_irq(&pdev->dev, ch->errirq, ch); in sf_pdma_remove()
564 list_del(&ch->vchan.chan.device_node); in sf_pdma_remove()
565 tasklet_kill(&ch->vchan.task); in sf_pdma_remove()
566 tasklet_kill(&ch->done_tasklet); in sf_pdma_remove()
567 tasklet_kill(&ch->err_tasklet); in sf_pdma_remove()
570 dma_async_device_unregister(&pdma->dma_dev); in sf_pdma_remove()
576 { .compatible = "sifive,fu540-c000-pdma" },
585 .name = "sf-pdma",