1 From c094e905cb0f542acdeb5d7009ab9edc812897f7 Mon Sep 17 00:00:00 2001
2 From: Yuichi Kusakabe <yuichi.kusakabe@jp.fujitsu.com>
3 Date: Thu, 18 May 2017 17:32:30 +0900
4 Subject: [PATCH 05/15] Add rcar-dma hibernation code
6 Signed-off-by: Yuichi Kusakabe <yuichi.kusakabe@jp.fujitsu.com>
8 drivers/dma/sh/rcar-dmac.c | 27 +++++++++++++++++++++++++++
9 1 file changed, 27 insertions(+)
11 diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c
12 index e5e60ee..3b4a684 100644
13 --- a/drivers/dma/sh/rcar-dmac.c
14 +++ b/drivers/dma/sh/rcar-dmac.c
15 @@ -121,6 +121,7 @@ struct rcar_dmac_desc_page {
16 * struct rcar_dmac_chan - R-Car Gen2 DMA Controller Channel
17 * @chan: base DMA channel object
18 * @iomem: channel I/O memory base
19 + * @backup: channel I/O memory backup base
20 * @index: index of this channel in the controller
21 * @src_xfer_size: size (in bytes) of hardware transfers on the source side
22 * @dst_xfer_size: size (in bytes) of hardware transfers on the destination side
23 @@ -140,6 +141,7 @@ struct rcar_dmac_desc_page {
24 struct rcar_dmac_chan {
30 unsigned int src_xfer_size;
31 @@ -171,6 +173,7 @@ struct rcar_dmac_chan {
32 * @engine: base DMA engine object
33 * @dev: the hardware device
34 * @iomem: remapped I/O memory base
35 + * @backup: remapped I/O memory backup base
36 * @n_channels: number of available channels
37 * @channels: array of DMAC channels
38 * @modules: bitmask of client modules in use
39 @@ -179,6 +182,7 @@ struct rcar_dmac {
40 struct dma_device engine;
45 unsigned int n_channels;
46 struct rcar_dmac_chan *channels;
47 @@ -277,6 +281,7 @@ static void rcar_dmac_write(struct rcar_dmac *dmac, u32 reg, u32 data)
48 writew(data, dmac->iomem + reg);
50 writel(data, dmac->iomem + reg);
51 + writel(data, dmac->backup + reg);
54 static u32 rcar_dmac_read(struct rcar_dmac *dmac, u32 reg)
55 @@ -301,6 +306,7 @@ static void rcar_dmac_chan_write(struct rcar_dmac_chan *chan, u32 reg, u32 data)
56 writew(data, chan->iomem + reg);
58 writel(data, chan->iomem + reg);
59 + writel(data, chan->backup + reg);
62 /* -----------------------------------------------------------------------------
63 @@ -1548,10 +1554,25 @@ static int rcar_dmac_runtime_resume(struct device *dev)
67 +static int rcar_dmac_freeze(struct device *dev)
72 +static int rcar_dmac_restore(struct device *dev)
75 + struct rcar_dmac *dmac = dev_get_drvdata(dev);
76 + ret = rcar_dmac_init(dmac);
80 static const struct dev_pm_ops rcar_dmac_pm = {
81 SET_SYSTEM_SLEEP_PM_OPS(rcar_dmac_sleep_suspend, rcar_dmac_sleep_resume)
82 SET_RUNTIME_PM_OPS(rcar_dmac_runtime_suspend, rcar_dmac_runtime_resume,
84 + .freeze = rcar_dmac_freeze,
85 + .restore = rcar_dmac_restore,
88 /* -----------------------------------------------------------------------------
89 @@ -1571,6 +1592,7 @@ static int rcar_dmac_chan_probe(struct rcar_dmac *dmac,
92 rchan->iomem = dmac->iomem + RCAR_DMAC_CHAN_OFFSET(index);
93 + rchan->backup = dmac->backup + RCAR_DMAC_CHAN_OFFSET(index);
94 rchan->mid_rid = -EINVAL;
96 spin_lock_init(&rchan->lock);
97 @@ -1657,8 +1679,13 @@ static int rcar_dmac_probe(struct platform_device *pdev)
98 /* Request resources. */
99 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
100 dmac->iomem = devm_ioremap_resource(&pdev->dev, mem);
101 + dmac->backup = devm_kzalloc(&pdev->dev, resource_size(mem), GFP_KERNEL);
102 if (IS_ERR(dmac->iomem))
103 return PTR_ERR(dmac->iomem);
104 + dmac->backup = devm_kzalloc(&pdev->dev, resource_size(mem), GFP_KERNEL);
105 + if (IS_ERR(dmac->backup)) {
106 + return PTR_ERR(dmac->backup);
109 irq = platform_get_irq_byname(pdev, "error");