| shdmac.c (597473720f4dc69749542bfcfed4a927a43d935e) | shdmac.c (8b229a01a5b846bf7a45c8ef11bc3b81326c9409) |
|---|---|
| 1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * Renesas SuperH DMA Engine support 4 * 5 * base is drivers/dma/flsdma.c 6 * 7 * Copyright (C) 2011-2012 Guennadi Liakhovetski <g.liakhovetski@gmx.de> 8 * Copyright (C) 2009 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com> --- 664 unchanged lines hidden (view full) --- 673 DMA_SLAVE_BUSWIDTH_16_BYTES | DMA_SLAVE_BUSWIDTH_32_BYTES; 674 const struct sh_dmae_pdata *pdata; 675 unsigned long chan_flag[SH_DMAE_MAX_CHANNELS] = {}; 676 int chan_irq[SH_DMAE_MAX_CHANNELS]; 677 unsigned long irqflags = 0; 678 int err, errirq, i, irq_cnt = 0, irqres = 0, irq_cap = 0; 679 struct sh_dmae_device *shdev; 680 struct dma_device *dma_dev; | 1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * Renesas SuperH DMA Engine support 4 * 5 * base is drivers/dma/flsdma.c 6 * 7 * Copyright (C) 2011-2012 Guennadi Liakhovetski <g.liakhovetski@gmx.de> 8 * Copyright (C) 2009 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com> --- 664 unchanged lines hidden (view full) --- 673 DMA_SLAVE_BUSWIDTH_16_BYTES | DMA_SLAVE_BUSWIDTH_32_BYTES; 674 const struct sh_dmae_pdata *pdata; 675 unsigned long chan_flag[SH_DMAE_MAX_CHANNELS] = {}; 676 int chan_irq[SH_DMAE_MAX_CHANNELS]; 677 unsigned long irqflags = 0; 678 int err, errirq, i, irq_cnt = 0, irqres = 0, irq_cap = 0; 679 struct sh_dmae_device *shdev; 680 struct dma_device *dma_dev; |
| 681 struct resource *chan, *dmars, *errirq_res, *chanirq_res; | 681 struct resource *dmars, *errirq_res, *chanirq_res; |
| 682 683 if (pdev->dev.of_node) 684 pdata = of_device_get_match_data(&pdev->dev); 685 else 686 pdata = dev_get_platdata(&pdev->dev); 687 688 /* get platform data */ 689 if (!pdata || !pdata->channel_num) 690 return -ENODEV; 691 | 682 683 if (pdev->dev.of_node) 684 pdata = of_device_get_match_data(&pdev->dev); 685 else 686 pdata = dev_get_platdata(&pdev->dev); 687 688 /* get platform data */ 689 if (!pdata || !pdata->channel_num) 690 return -ENODEV; 691 |
| 692 chan = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
| 693 /* DMARS area is optional */ 694 dmars = platform_get_resource(pdev, IORESOURCE_MEM, 1); 695 /* 696 * IRQ resources: 697 * 1. there always must be at least one IRQ IO-resource. On SH4 it is 698 * the error IRQ, in which case it is the only IRQ in this resource: 699 * start == end. If it is the only IRQ resource, all channels also 700 * use the same IRQ. 701 * 2. DMA channel IRQ resources can be specified one per resource or in 702 * ranges (start != end) 703 * 3. iff all events (channels and, optionally, error) on this 704 * controller use the same IRQ, only one IRQ resource can be 705 * specified, otherwise there must be one IRQ per channel, even if 706 * some of them are equal 707 * 4. if all IRQs on this controller are equal or if some specific IRQs 708 * specify IORESOURCE_IRQ_SHAREABLE in their resources, they will be 709 * requested with the IRQF_SHARED flag 710 */ 711 errirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | 692 /* DMARS area is optional */ 693 dmars = platform_get_resource(pdev, IORESOURCE_MEM, 1); 694 /* 695 * IRQ resources: 696 * 1. there always must be at least one IRQ IO-resource. On SH4 it is 697 * the error IRQ, in which case it is the only IRQ in this resource: 698 * start == end. If it is the only IRQ resource, all channels also 699 * use the same IRQ. 700 * 2. DMA channel IRQ resources can be specified one per resource or in 701 * ranges (start != end) 702 * 3. iff all events (channels and, optionally, error) on this 703 * controller use the same IRQ, only one IRQ resource can be 704 * specified, otherwise there must be one IRQ per channel, even if 705 * some of them are equal 706 * 4. if all IRQs on this controller are equal or if some specific IRQs 707 * specify IORESOURCE_IRQ_SHAREABLE in their resources, they will be 708 * requested with the IRQF_SHARED flag 709 */ 710 errirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 712 if (!chan || !errirq_res) | 711 if (!errirq_res) |
| 713 return -ENODEV; 714 715 shdev = devm_kzalloc(&pdev->dev, sizeof(struct sh_dmae_device), 716 GFP_KERNEL); 717 if (!shdev) 718 return -ENOMEM; 719 720 dma_dev = &shdev->shdma_dev.dma_dev; 721 | 712 return -ENODEV; 713 714 shdev = devm_kzalloc(&pdev->dev, sizeof(struct sh_dmae_device), 715 GFP_KERNEL); 716 if (!shdev) 717 return -ENOMEM; 718 719 dma_dev = &shdev->shdma_dev.dma_dev; 720 |
| 722 shdev->chan_reg = devm_ioremap_resource(&pdev->dev, chan); | 721 shdev->chan_reg = devm_platform_ioremap_resource(pdev, 0); |
| 723 if (IS_ERR(shdev->chan_reg)) 724 return PTR_ERR(shdev->chan_reg); 725 if (dmars) { 726 shdev->dmars = devm_ioremap_resource(&pdev->dev, dmars); 727 if (IS_ERR(shdev->dmars)) 728 return PTR_ERR(shdev->dmars); 729 } 730 --- 208 unchanged lines hidden --- | 722 if (IS_ERR(shdev->chan_reg)) 723 return PTR_ERR(shdev->chan_reg); 724 if (dmars) { 725 shdev->dmars = devm_ioremap_resource(&pdev->dev, dmars); 726 if (IS_ERR(shdev->dmars)) 727 return PTR_ERR(shdev->dmars); 728 } 729 --- 208 unchanged lines hidden --- |